Note: Descriptions are shown in the official language in which they were submitted.
Device for the protection of openings on the con-_
veyin~ means inlet or outlet side_in belt conveyors
1 The invention concerns a device for the protec-
tion of openings on the conveying means inlet or
outlet side between the peripheral region close to
the supporting frame of a deflector or feeding or
delivery roll or roller respectively or Pulley or
guide and/or pressure roller or pulley for the con-
veying means of a band conveyor, which`preferably is
designed in single or multiple band or belt construc-
tion or as plate or hinged load supporting element
conveyor and the front end close to the roller or
pulley of the supporting frame of the same and/or the
supporting piece of the bearing device for this or
- these roller(s) or ~ulley~s) against risks of accident
` by inadvertent or unauthorized intervention in such an
opening.
:a~2~81~
-- 2 --
1 It is a known fact that such openings in band
conveyors of the type described represent a feared
source of danger in that fingers or parts of clsthing
get into them during conveying and can be drawn in
between the conveying means and the roll or pulley
concerned, which according to experience can lead to
serious accidents, of which contusions of the limbs
are to be regarded as of slight severity. In addition
such openings, which in conveyors working in one plane
are present both in the region of the conveyed ~roduct
eeding station and of the ccnveyed product delivery
station~ and this being irrespective of'whether the
drive takes ~lace through the feeding roller or pulley
set or through the delivery roller or pulley set or
through a separate drive roller or pulley set arranged
between the two, and in conveyors with kinks along the
path of the strands in addition to these places also
in the regions on the conveying means approach side and
runoff side of the de1ector roller or pulley set or
zo of the holding down roller or pulley set, this being in
all cases both in the re~ion of the upper strand and
also of the lower strand of the conveyin~ means, offer
undesired possibilities for dirt or foreign bodies to
fall iri or be brought into the interior or the suppor-
ting frame of the band conveyor where hereby the risk
of operating faults and/or of impairments in the hygiene
is caused and corresponding maintenance or cleaning
measures with the corresponding feared operating dead
times become necessary already aEter relatively short
operating intervals. It is therefore very highly desired
to be able to remedy these defects in band co~veyors
with simple and inex~ensive means and those which
where required can also be brought into efect quicXly
and conveniently by means of retrofittin~ and to be
able to protect the band conveyor agairls~ dangerous
entry of limbs or clothin~ as ~yell as against un-
desired penetration of dir~ or forei~n bodies at the
described openings.
~z~
1 This is achieved in a surprislngly simple and
economic manner according to the invention by a
covering device bridging over the access-endangered
intermediate space between,the peripheral region of
the roller or pulley close to -the supporting frame
and runoff edge close to the roller or pulley o~ the
supporting frame for the conveying means or its front
sur~ace close to the roller or pulley extending from
the supporting Erame side in the direction of the cen-
tral longitudinal plane of the band conveyor normal
' to the surface of the conveying means on the conveyed
product side at l'east up to a distance to the s~d
band conveyor granting a movement play for the upper
and/or the lower strand of the conveying means.
; In this case accor,ding to a lower-ranking basic
idea of the invention.developing the ihvention further~
the covering device can possess in each case at least
one coveriny member extending like a wing into;:the
access-endangered intermediate space between each
- . 20 - ---supporting frame side and the associated side edge
of the upper and/or of the lower strand of the con-
veying means. This can extend with advantage over the
described access-endangered intermediate'space up ~o
above the associated side edye of the upper and/or of
the lower strand of the co~veying means and furthermore
preferably overlap the associated lower strand of the
conveying means, whereby ~urthermore.preferably the
or at least one of the covering memberls) can be
arranged overlapplng the associated upper strand of
the conveying means and/or the or at least one of the
covering member(s~ can be arranged overlapping an~/or
underlapping the associated lower strand of the c'on~
veying means.
Another proven verslon of the invention ls
characterized in that the covering devlce possesses
at least one covering member overlappin~ -the lnternal
intermediate space between bo-~h supporting frame sides
and underlapping the upper strand of the conveying means
and/or at least one co~ering member underlapping and~or
o~erlapping the lnternal intermediate space between
both supportin~ ~rame sides. In this case independent
:~2~
1 of whether it is a question of the upper or the
lower strand of the conveying means, it is always
meant with underlapping that the covering member
lies on the side of the conveying means remote from
the conveyed product or its inner side, whilst over-
lapping means that the covPring member extends over
the side of the conveying means on the side of the
conveyed product or on its outer side.
According to the des~ign of the band conveyor,
an access-endanqered o~ening of the described type
can occur on one or both supporting frame s{dels~,
and is then protected by means of a covering member
according to the invention or several af the same,
whereby this applies both for the feeding and also
lS for the delivery end of the band conveyor just as for
the approach and/or the runoff region of a separate
drive station possibly arranged between the ~wo and
also for the approach and/or runoff region of the
. ` guide device and/or of the holding down devlce at the
20 kinking point of a design with a k.ink along the path
- of the strands. In this case it must be further-more
emphasized that the invention not.withstanding the
previously descri~ed typ~ of.use can find application
for the protection of access-endangered openings both
in the region in each case of the upper strand or of
the lower strand of the conveying means alone or else
simultaneously of both strands.
It is basically immaterial according to the con-
cept of the invention which distance as regards to
30 height the covering mer~er~s3 have to the associated
strand of the conveying means, however, a version of
the invention according to a lower-ranking basic idea
of the invention has proven its~lf in particular, accor-
ding to which the or at least one of the covering member(s
s
is formed as guide device for the feeding or delivery of
the upper or lower strand of the conveying means to
or from respectively the rollerls~ or pulley~s). In this
case the covering member formed as guide device can
with advantage be arranged serving on the inside of
the supporting frame or else also on the outside of
the supporting frame as support of the associated
upper or lower strand of the conveying means for its
surface distant from the conveyed product or as en-
closure for its surface on the conveyed product side.
In these cases namely each covering member is also
still utili2ed with a further function in an advan-
tageous manner, in that it is also made use o~ corres--
ponding to its surface contouring and in particular
lS also its arrangement in addition to its protecting
function to serve as support and quide for the side
regions of the strand of the conveying means con-
cerned adjoining the access-endangered openings or
bounding these openings, so that even larger lengths
of such openings existing between sùpporting frame
and conveying strand side region can be protected in
the conveying direction or longitudinal direction of
the band conveyor and simultaneously a su-o~ort pro-
tecting the conveyinc~ means strand against undesired
or inadmissable sagging loading can ~e offered in the
corresponding length region of the conveying medium
strand~ This then is o~ effect particularly advanta-
geously if it is a question of longer lengths of the
strand of the conveying means in the conVeyincJ direction
which without such a utilization o~ the coveriny mem-
b~r or of the covering~bers according to the invention
also as guide device ~or -the strand of the conveying
means concern~d frequently would be subjected to an
inadmissably high operating loading because of excessi~e-
Ly long free sagc~ing lengths.
E'urthermore it has also proven to be particularly
advantageous, if accorcling to another lower-rankinc;
basic idea of the inventioll, the covering device
possesses at least a pair of covering members stretching
~2~
-- 6 --
1 from the opposite longitudinal beams or side webs of
the supporting frame in the direction of the central
longitudinal plane of the band conveyor normal to the
surface on the conveyed product ~ide of th~ upper and~
or of the lower ~trand of the conveying means. The ln-
vention is namely not restricted to designs of band
conveyors with a supporting frame formed from two
opposite longitudinal beams and a number of cross
beams arranged at a distance from one another and
possibly a covering and/or chu~e and/or apron sheet
or else a distance piece connected ~ith the two longi-
tudinalrbeams, but it can find application expediently
also in any other supporting frame design, such as
for example in a supporting frame formed as single
piece U or C section with or without stiffening by
cross beams. The version according to the last des-
cribed lower-ranking basic idea of the invention never-
theless comes into consideration only for such band
conveyors in which access-endangexed apenings of the
descrlbed type are present on bot}l sicles of the stralld
of the conveying means concerned between this and the
adjoining longitudinal beam of a made up supportlng
frame or the adjoining side web of a supporting frame
formed as single piece section.
In further expedient development, the or at least
one of ~the covèring memberls ) can be arranged perma-
nently fixed to the supporting frame. Both for first
equipment and also for retrofitting purposes o existing
band conveyors it can fur-ther be recommended if in
further inventive development the or at least one of
the coverinc3 memherls) is fastened in a detachable manner
to the supporting frame.
Basically it is accordinc3 to the concept of the
invention also of no consequence if the covering member(s)
are heid at the supporting frame of the ba~d conveyor,
if a change in the length of the opening to be protected
8~
-- 7 --
1 in the conveying-direction is to be expected, as for
example can be the case in the course of changing the
axial distance of the two deflector rolls or rollers
or pulley sets of the conveying means on operating
the tensioning station for the said conveying means,
for the covering member(s) according to the invention
can be held adjustable in the conveying direction in
relation to the supporting frame, However~ a version
according to an alternative lower-ranking basic idea
of the invention has proven itself in particular,
according to which the covering device possesses at
least a pair of covering members extending from oppo-
site supporting pieces o~ a bearing de~ice for one or
several rollerls) ox pulley(s) on the same axis in
the direction of the central longitudinal plane of
the band conveyor normal to the surface on the con-
veyed product side of the upper and/or of the lower
strand of the conveying means.
In this case in expedient development of this
lower-ranking basic idea of the invention in parti-
cular in versions with supporting pieces of the bea-
- ' - ring device for the roller(s~ or pulley(s) which are
changable in position in the longitudinal direction
- in relation to the supportiny f rame, the or at least
one of the covering member~s~ can be arranged perma-
nently attached to the supporting piece and in this
case with aclvantage can be formed as one piece with
the supporting piece. On the other hand, however, it
has proven to be particularly exped~ent both in first
equipment and also for retrofitting purposes if the
or at least one of the covering memberis~ is fastened
in a detachable manner to the associated support piece
for the bearing device for the roller(s~ or the pulley(s).
In this connection attention must be clrawn to the
3S fact that versions of the invention can also be ex-
pedient in which one or several c~vering member(s~
f ixed permanently to the supporting arm and fixed per-
manently to the supporting piece jointly are used,
-- 8 --
1 which then jointly contribute to ~ulfilling the protec-
tion task according to the invention and possibly at
the same time also supporting the strand. In all versions
with detachably fastened coveriny member(s) it can prove
to be advantageous if in further inventive dev~olQpment
the covering member (5) is or are astenened on the
outside or on the inside of the associated longltudinal
beam or side web of the supporting frame or of the
.~ associated supporting piece of the bearing device for
the rolle.r(s~ or Pulley(s). Here design aspects can
be decisive in paxticular with regard to economical
manufacture of the covering members and/or requirements
regarding the oPeration of the band conveyor and the
hygiene of the same as well a5 the type of installation
and where necessary OL the connection of the same to
units of a conveying track connected in front or behind
as well as also with regard to the simplicity and
. quickness of the assem~ly and disassembly.
Further it has proven itself ln particular if
according to another lower-ranking basic idea of the
invention for versions in which covering members are
provided at the same time both for the upper strarld
and also for the lower strand of the conveyin~ means,
the covering members for upper and lower strand of the
conveying means associated with the longitudinal beam
of the supportin~ frame or with a supporting plece of
the bearin~ device for the roller(s) or pulley(s) are
arranged with the same distance from the adjoining lon-
gitudinal edge of the longitudinal beam or supporti.n~
piece, preferably in alignment with this. It has keen
further shown to be of advantage from the same aspect,
if in such versions with uppe~ and lower strand of the
conveying means protected according to the invention,
the covering members for upper and lower stxand of the
conveying means associated with a longitudinal beam of
the supporting rame or with a supporting piece of the
bearin~ device for the roller~s) or pulley~s) are
arranged with the same distance ~rom th~ front edge of
the longitudinal beam or suppoxting piece placed on the
other side.
- 9 -
1 of the roller or pulley axle. Further rationalizations
of inventory of individual parts required for the pro-
duction o~ band conveyors of different versions and
sizes and of their assembly can be obtained in the
sense of the objective forming the basis of the in-
vention by both measures on their own and all the more
by their interplay, since in such cases hoth longitu-
dinal beams for the production of the supporting frame
and sectional pieces forming its entire width as well
as the supporting pieces for the production vf the
bearing device of the requi ed roller(s) or pulleyls~
no longer need to be kept in stock in right hand a~d
left hand version, but one can manage with one single
version of these individual parts in each case.
In the interest of using existing longitudinal
- beams and/or supporting pieces, which serve for ver-
sions of band conveyors of conventional type, it has
proven to be of advantage both for the first production
of band conveyors according to the invention and also
for the conversion or retrofitting of conventional
versions to the invention, if according to another
lower-ranking basic iclea of the invention the or at
least one of the covering member(s) is formed as angle
piece preferably of plate or plastic, which is fastened
~5 with its one angle side parallel to a plane of the ad-
joining longitudinal beam and of the side web of the
~support frame or of the adjoining supporting piece of
the bearing device for the roller(s) or pulley(s)
parallel to the central longitudinal plane of the band
conveyor, to this longitudinal beam or side web or to
this supporting piece respectively. This attachment of
the anyle piece can take place in this case with ad-
vantage in each case so that its free angle side func-
tioning as co~ering and should the occasion arise also
as guide angle side not ~astened to the longitudinal
beam or side web of the supporting frame or to the
supporting piece of the bearing device runs parallel to
the longitudinal axis of this longitudinal beam or side
web cr supporting piece. Basically such a formation and
arrangement is indeed in no way necessary~ since the
-- 10 --
1 angle pieces forming the protection cover according -to
the invention and should the occasion arise at the same
time also support for the conveying means for the pur-
pose of guiding the same can also be in workiny posi-`
5 - tion with their free arm side inclined in relation to
the longitudinal beam axis, especially as in some
versions of band conveyors the main course of the
strand concerned runs in a plane other than the corres-
ponding tangential plane to the roller(s) or pulley(s)
deflecting the strand of the conveying means concerned.
However, one version and arrangement of this angle
~ piece with ree arm side parallel to the longi-tudinal.
beam longitudinal axis also offers here as well as
in the previously described lower-ranking basic idea
of the invention of the formation and arrangement of
the covering membexs symmetrical with regard-to the
sectional height of the longitudinal beams or side
webs of the supporting frame and also of the symmetry
of the formation and arrangement of covering members
for at the same time upper and lower.strand of the
conveying means supported by a supporting piece of the
bearing device,the advantage with regard to the outer
edge oE the supporting piece distant from the suppor-
ting frame, to be able to dispense w~th right hand and
let hand versions and instead of this to be able to
manage wlth a single ver~ion.
For certain versLons of band conveyors t and indeed
in partlcular those in which for reasons oE special
light construction an additional stiffening o the to~al
structure of both supporting frame rollers and bearlng
device for the roller(s) or pulley~s~ shoulcl be dls-
pensed wlth, it has proven to be expedient lf according
to an alternative lower-ranking bas:Lc idea or the in-
ven-tion the or at least one of the covering membert~) Ls
1 formed as U or C section preferably from plate or
- plastic, which is fastened with its side webs parallel
to a plane of the adjoining longitudinal beam or side
web of the supporting frame or of the adjoining suppor-
ting piece of the bearing device for the roller(s~
or pulley(s) parallel to the central longitudinal plane
of the band conveyor in each case. In this case here
as well the covering member design and arrangement can
be made so that it is located in a working position
in which its bridge-like central web runs parallel to
the longitudinal axis of the longitudinal beam or side
web or supporting piece holding it. It is apparent
that here whilst retaining the alxeady described ad-
vantages of the covering members formed as angle
pieces, a not infrequently desired bri~e-like sti~fe-
ning of the band conveyor can be achieved for improving
the bending and twisting stiffness of the entire frame-
work structure of the band conveyor by the formation
of the covering member according to this lower-ranking
basic idea of the invention.
In particular, but in no way exclusively, it can
be a requirement in retrofitting tasks, that no machi-
ning work should or may be performed on an already
installed band conveyor plant, which, however, is-to
be equipped with the invention. In such cases diffi-
culties with regard to the supporting of the covering
-- - - member or of the covering members at the supporting
frame or else at a supporting piece of the bearing
device can result. Here a version according to another
lower-ranking basic idea of the invention can be of
assistance according to which the or at/ln3S~of the
covering member(s) is supported in relation to the
axle of the roller(s) or pulley(s). This axle namely
is usually available as support with sufficient width,
- 12 -
l but is generally not readily used as such, because
expert opinion considers an addltional roller bearlng
to be necessary for thls, in order to avoid grinding
with corresponding ~ear and undesired noiæ annoyance.
However, experience has shown that this is in no way
necessary, that one can rath~r manage by all means
also with simple resting of the covering member con~
cerned on the roller or pulley set axle and at all
events inexpensive lining of the bearing place with
plastic material~ such as for example tetrafluorethylene
can be adequat~ in order to exclude all undesired defects
effectively.
IndependPnt of whether covering members extending
solely from the supporting frame or supporting piece
side into the intermediate space between the two oppo-
site longitudinal beams or side webs of the supporting
frame or ~upporting pieces o the bearing device or
if only one of the same on one side of the strand of
. the conveying means concerned or else a covering member
- 20 structure spanning this intermediate space like a bridge
is used, it has proven to be recommendable for many
applications if according to a further lower-ranking
basic idea of the invention, which re~ers both to
covering members ixed to the supporting frame and to
those fixed to the s~pporting piece, the covering mem-
ber~s~ for the upper strand and/or the covering member(s)
for the lower strand of the~conveying means possesses
or possess a tongue extending from its or their faste-
ning point furthest distant from the roller ox pulley
axis in the longitudinal direction of the band con-
veyor somewhat like a flag into the intermediate
space between the opposite longitudinal beams or side
we~s of its supporting frame or supporting pieces of
the bearing device for the roller(s) or pulley(s). In
this case in expedient development, the flag~like tongue
can possess a length extending up to above the ad-
joining front side of ~he suppor~ing frame or of a
8~L~
- 13
l possibly provided chute and/or apron sheet or covering
sheet of the same~ Such designs can also be extremely
sensible in band conveyors in which the co~ering
member(s) according to the invention is or are supported
fixed to the supporting frame or else by supporting
pieces of the roller or pulley bearing device, whlch
are subjected to no displacements in relation to the
front edge of the supporting frame, as is frequently
the case for example in drive stations provided on the
front side of the frame. In such versions~ such 1ag
like covering member extensions can then be recommended
if indeed an as large as possible covering length in the
longitudinal frame direction or conveying direction is
desired, but no possibility is provided for fastening
a covering member according to the invention of corres-
ponding length above this to the associated longitudinal
beam or side web of the supporting frame or supporting
piece of the bearing device, as for example because
certain partial regions of this total length of such
a covering member are occupied by bolt connections or
the like for other purposçs, 50 that these are to be
evaded by a corresponding flag lîke extension region of
the covering member accordlng to the invention con-
cerned. For versions of band conveyors with supporting
pieces of the bearing device for the roller(s3 or
pulley(sj movable in position in relation to the
supporting frame in the longitudinal direction of the
same, as can be the case in particular with tensioning
station of the band conveyor arranged on the supporting
frame head xide, a further development of this lower-
ranking basic idea of the invention has proven to be
particularly expedient, according to which the flag
like tongue possesses a length stretching -e~en in a
position o~ the associated supporting piecc~s), in
which this or these possesses or possess a maximum
distance in relation to the front edge of the associated
longitudinal beam or side we~ of the supportiny frame,
~%~
1 up to beyond the adjoining front edge of the suppor~
ting fxame or of a possibly provided chute and/or
apron sheet or covering sheet of the same. Here in
dependent of whether the protectlng cover according
to the invention is designed as covering members ex-
tending on both sides freely into ~he space between the
two supporting pieces of the bearing device or else
as bridge like structure o'verlapping these, it can
be guaranteed extremely simply that independent of the
type and size of the respective offset movement ~f the
-roller or pulley axis in relation to the front edge of
the supporting frame for example in the course of ope-
rating a tensioning station for the conveying means,
to which this bearing station belongs, each access-
endangered opening to the internal space between the
two strands of the conveying means lying in its range
remains held protected reliably by corresponding cove-
ring effective constantly over the total length of this
opening, and this being the case without any impair~ent
~o of a possibly desired guiding or supporting function
for the associated strand-of the conveying means in
its side edge region or else, if deslred, over its
entire width.
' For versions of the invention with detachably .
2S fastened covering member(s) it has further proven to
be particularly expedient for reasons of rationalizing
the manufac,ture and assembly and base~ on the ~now-
ledge that covering members changable relatively in
relation to the supporting structural part are indeed
possible/ ~ut in most cases by no means necessary, in,
order to assume the corresponding protection and where
necessary also supporting and/or guiding function, if
according to another lower-ranking basic idea of the
invention the covering member(s) is or are fastened
3S so that their relative position cannot be changed in
relation to the associated longitudinal beam or side
web of the supporting frame or the associated suppor-
ting piece of the bearing device for the rollerls )
or.pulley(s~.
.
:~L2;2~8:1~
-- 15 --
1 In this case the covering member(s) can be fastened
with advantage in each case by means of at least on~
screw element. However, on the other hand it has proven
to be even more expedient for most applications,
because more simply and more economically capable of
manufacture and to assemble or disassemble, if the
covering member(s) in each case is or are fastened
by means of a plug connection arranged distant from the
supporting frame and/or a plug connection arranged
close to the supporting frame or by means of two plug
connections on the side distant from the supportin~
frame or on the side close to the supporting frame or
on both sides of the rollerts~ ox pulley(s) conslsting
in each case of a pin f ixed to the longitudinal beam
or side web or supporting piece and an accepting ~ush
fixed to the covering member for this or a pin fixed
to the covering member and an accepting bush fixed
~o the longitudinal beam or side web or supporting
piece. This design namely makes it possibl~ to dispense
with xelatively expensive screw elements even if ~hese
are commercially available or the production o
~hreaded holes by the possibility of using simple round
bar steel sections in cooperation with for example
punched holes whlch can be produced during the pres-
sing of the parts forming the frame in these or else
simple drilled holes.
However, fbr certain applications a co~ering member
holder has proven itself in particular in versions of
the invention with detachably fastened covering member(s)
in which the covering member~s3 is or are fastened
to the associated longitu~inal beam or side web of the
- supportillg fxame or the associated supporting piece
of the bearing device for the rollerls) or pulley(s~
capable of swivelling in relation to this. In thls case
.
- 16 -
l the covering member~s~ can with advantage be fastened
in each case by means of a plug connection arranged
on the side distant from the supporting *ramP or on
the side close to the supporting frame of the roller~s)
or pulley~s~ consisting of a pin fixed to the longi-
tudinal beam or side web or supporting piece and an
accepting bush fixed to the covering member for this
or of a pin fixed to the covering member and an accep-
ting bush for this rixed to thP longitudinal beam or
side web or supporting piece. Here as well the already
described advantages of such plug connections arise.
The articulation of the coverin~ member or of the
co~ering members opens up not infrequently a parti-
cular design freedom of movement and can contribute
not inconsiderably to simplifying the assembly and/or
disassembly of the same for example for inspection or
maintenance purposes and also otherwise simplify the
handling.
Furthermore it can be provided expediently that
the covering member(s) in each case is or are supported
fixed to the supporting frame for sliding movement
at its end distant from the roller or pulley to be
designated as tail end.Furthermore the covering member(s)
can possess in advantageous development of the invention
an offset end distant. from the roller or pulley. Irres-
pective of the type, where and how the support of ~he
~ covering member or of the covering memb~rs according
to the invention taXes place, this or -these can possess
according to another further development of ~he in-
vention a somewhat z-shaped end distant from the r~ller
or pulley angled in relation to lts or their end
close to the roller or pulley. Further it can be ad-
vantageous if the covering member(s) is or are supported
by means of a sliding guide device on the lon~itudina
beam or side web side. h particularly simple and yet
adequately reliable design is characteri~ed in that
- 17 -
l the covering member~s) is or are supported by resting
on a cross beam of the supporting frame.
Although within the scope of the invention covering
member designs of.pxactically arbitrary type are
possible and can ~e expedient differently for the
most widely dlfferent appllcations, a further develop-
ment of the invention ha~ proven itself especially in
particular, but not e~clusively, for retrofitting pur-
poses of existing band conveyors of conventional design,
according to which the covering member(s) in each case
is or are fastened with its or their end close to the
roller or pulley to a supporting rod fastened to the
associated longitudinal beam or side web of the suppor-
ting frame or supporting piece of the bearing device
for the roller(s) or pulley(s), preferably when two
covering me~bers opposing one another in pairs or a
single covering member bxidging over the intermediate
. . space between these opposing longitudinal beams or
side webs or supporting pieces is or are fastened ~o
- 20 a supporting rod fastened to these longitudinal beams
or side webs or supporting pieces. In this case the
covering member(s~ can be fastened in each cas~ to the
associated supporting rod by welding, ce~lenting~
screwing, clamping or pinning, whereby its or their
- 25 connection area(s) distant from the roller or pulley
with regard to this fastening place is or are flanged
. around this supporting rod. Obviously su-ch a version of
the invention can be produced particularly simply and
practically at any operating site of a band conveyor
without the need of larger o.r mechanical and correspon-
dingly expensive tool equipment and .it can be brought
into its working position extremely simply.
It can further be worthy of recommendation above
all for special cases, if with another development of
the invention the covering device i5 formed for changing
the size of the distance grantir1g the movement play
1 for the upper and/or the lower strand of -the con--
veying means. In this case the covering device can
possess with advantage at least one covering member
adjustable in its effective width in the direction of
the central longitudinal plane of the band conveyor
normal to the surface of the conveying means on thP
conveyed product side. In this way it is generally
possible, in the interests of'the rationalization
aimed for by the invention, to be able to prefabrlcate
and keep in stock covering members which should be
usable equally well for different band conveyor versions
or sizes or types.
Another expedient development of the invention
is directed in the same direction according to which
the covering device is formed for changing the siz~
-of its distance to the associated roller or pulley
arranyement. In this case the or at least one of the
covering member~s~ can expediently be held displacable
for changing ~ts dlstance to the associate~ roller or
pulle,y arrangement and attachable in the desired working
position to the associated longitudlnal beam(s~ or
side webls) or the ~upportiny frame or to the associated
supporting piece 151 of the bearinq device for the
roller~s) or pulley(sl.
In the following, the invention is explained
more closely purely by way of example by reference
~ to some preferred design examples, as displayed dia
gramatically in ~e drawings, in this case:
Fig. 1 shows in graphical representation with bxoken
' out central piece of a longitudinal beam one
side of a supporting fralne of a band conveyor
device according to the invention,
- 19 ~
l Fig. 2 shows in representation corresponding to the
representation according to Fig. 1 another design
version of a supporting piece of the bearing
device for a de1ector or feecling or delivery
roller,
Fig. 3 shows in representatlon corresponding to the
representation according to Fig.2 a covering
hood for the supporting frame,
Fig. 4 shows in representation corresponding to the
representation according to Fig.1 one side of a
kinking fitting of the supporting fra~P of a
band conveyor device formed with a kink along
the path of the strands J
Fig. 5 shows in ~iagramatical representation of a ver-
tical longitudinal section the end on the de-
flector roller side of a band conveyor device
without displaying the supporting frame and
Fig. 6 shows in plan view two different versions of
covering members fastened detachably to the
supporting frame. In this case individual parts
corresponding to one another are marked in each
- case with the same reference symbols.
The band conveyor device according to the in~ention
designated as entity with 1 possesses a supporting
frame designated in Fig. 1 with 3, which is formed from
one or several longitudinal beams 5 arranged after one
another in the suppbrting frame longitudinal direction
and connected with one another, which lie opposite one
another in pairs and of which only one is shown with its
two end regions, whilst its central region is broken
away and on both sides in each case of a pair of sup-
porting pieces 13 or 23 of bearing devices for deflector
or feeding or delivery rollers, or which one is shown
in Fig. 5 and designated with 20. In the design example
~2~
- 20 -
1 shown in Fig. 1, the suppork~ng frame 3 possesses
longitudinal beams formed as C section, which in each
case are connected with one another in pairs lying
opposite to one another by cross beams and are stiffened,
of which one is shown in Fig. 5 and ls designated with
25. However, the supporting frame 3 could also be
formed as one piec~ in the transverse direction, with-
out this being shown, in that a C sectlon part pre-
senting a supporting surface supporting the upper
strand 29a of the conveying means 29 from its lowe.r
side is arranged forming the support frame with its
bottom web parallel to the strand of the conveying
means and its side webs parallel to the centra3. longi-
tudinal plane of the supporting frame.
In the design example displayed, the supporting
pieces 13 of the beari~g device for for exa~ple the
drive roller of the band conveying device and 23 ~or
- - for example the deflector or tensioning roller for the
conveying means 29 of the same are inserted in a manner
which is in itself known into the free profile opening
of the longitudinal beams 5 of the supporting frame 3
with their guide pieces 14 or 24 and are held fastened
in working position by means of screw elements engaging
in the fasteniny slots 15 of the same, whereby in
2.5 general necessary adjustment work or retensionlng
measures can he performed for example by means of screw
elements supporting themselves in relation to th~
supporting frame and engaging in threaded holes 18 in
~ensioning projections 17 on the associated supporting
piece 13 or 23 or else by means cf screw elements
supporting thems~lves on one hand in relaticn to-the
suppoxting frame and on the other hand in relation to
a side projection 27 on the supporting piece for example
-~hrough a threaded hole 28, as is illustrated in the
case of the right supporting piece 23 in Fig. 1. The
two supporting pieces 23 of the righ bearing device
in Fig. 1 possess open slots 26 on the front side
serving hoth as suspension takeup and also as sliding
. guides for the axle or shaft 21 ~show~ in Fig. 5) of a
~2~98~ L
- 21 ~
l deflector or feeding ox delivery roller 20 or of a
deflector or feeding or delivery roller or pulley set,
whilst in the case of the bearing device shown i~ Fig.1
Ol1 the left, it is shown that this axle or shaft 21
~an also be supported by a correspondlng takeup hole 16
in the supporting piece pair concerned. It is obvious
that instead of the slot 26~ the supporting piece 23
could possess such a shaft or axle takeup hole and
vice versa the supporting piece 13 instead of such a
hole 16 could possess a take~p or guide slot 26.
A preferred type of a support of a supporting
piece 13 on the supporting frame side is illustrated
in Fig. 5 in that namely a thrust angle 19 serving as
stop is inserted between the lower edge of the suppor-
*ing piece and the side web of a longitudinal beam
sect~on S (not shown in Fig. 53, the free end of which
thrust angle overlaps the front edge of the longitudinal
beam section 5, which can be for example the front
edge 38 shown in Fig. 1 and thereby is supported at
and in relation to this longitudinal beam profile 5
and thus the supportin~ frame 3. In this case a supporting
surface for a screw element screwed into the threaded
hole 18 o the projection 17, which is solely indicated
by its dash-and-do-t center line, i5 formed by thls
thrust angle 19.
It is apparent with particular clarity rom Fig.
that approximat~iy from the a~ial len~th of the rear
surface distant from the rol:Ler axis of the ree shank
- of the thrust angel 19, which corresponds to the front
- 30 edge 3~ of the longitudinal beam section 5 o the
supporting frame 3, up to approximately the tangential
approach position of the upper strand 29a of the con-
veying means 29 or to the tangential runoff posi-tion of
the lower strand 29b of the same, an acess-endangered
- 2~ -
l space between side edges of the strand concerned of the
conveying means 29a or 29b and the adjoining supporting
frame section, e.g. 5, is formed. This is shown for
example in the lower half of Fig. 6 and designated with
41, whilst the entire intermediate space between the
opposite section parts forming the supporting frame
sides, which -as in Fig. 1- can be formed as open hollow
section in the shape of a C section 5 or else - as
shown in Fig. 6 - as solid section 7 or as closed hollow
section 8, is designated with 40 ~e.g. Fi.g. 1 and Fig. 6).
In order to protect and secure this inavoidable
intermediate space 41 in conventional designs of band
conveying devices between the front edge 38 serving
as runoff or approach edge for the strand 29a or 29b
concerned of the conveying means 29 and the adjoining
position in the supporting frame longitudinal direction
A of the tangential approach or runoff of the strand
20a or 29b concerned of the conveying means 29 to
for example the adjoining deflector or feeding or
.delivery roller 20 on one hand and the outer surface
of the supporting frame section on the inside, for
e~ample of the outer plane 4a or the side web 4 of
. the longitudinal beam section 5 in the design example
according to Fig. 1, and the adjoining front side
surface of the conveying means 29 on the other hand,
which is open towards the interior o the supporting
frame, agail1st unauthorized just as against inadvertent
access in particular during the operation of the band
-- conveying device 1, a covering device i5 provided for
by the invention. This can possess different design
shapes, of which some are shown in Fig. 1 to 6 and
described in the following~ In this case it is of parti-
cular importance that these covering device designs
.
- 23 -
1 in any event close this previously described access-
endangered intermediate space 41 at least to the
e~tent that an entry or drawing in of clo~hing or
~he like is practically excluded during conveying.
This is achieved in that - as illustrated by way of
example in the upper half of Fig. 6 - a covering memb~r
supported by the supporting frame 3 is arranged bridging
over the access-endangered intermediate space 41 at least
up to a distance 39 granting solely a movement play
for the upper and/or the liower strand 29a or 29b re-
spectively of the conveying means 29.
In the case of the design example according to
Fig. 1, it is indicated that the covering device desig-
nated ~uite generally with 2 can be formed by approxi~
mately ear-shaped covering members 22 shaped onto the
supporting piecPs 13 or 23 extending in the direction
oî the central longitudlnal plane m normal to the
surface on the conveyed product side of the conveying
means 29~ which covering members can extend from the
supporting frame or supporting piece side-at least
- up to a distance 39 for sufficient movement play from
the front side s~rface of the strand 29a or 29b con-
cerned of the conveying means 29 and can possess with
advantage - as shown in Fig. 1 - an extension in the
transverse direction such that they also still under-
lap the strand 29a or 29b concerned of the conveyillg
-- mean~ 29. In this way not only is a cover fixed to
the supporting frame created in the region between front
edges 38 on the roller side of the supportin~ frame 3
and approach or runoff positions oE the strand 29a or
29b of the COnVeyinCJ means at the roller(s) or pulley(s)
concerned, but a bearing support for the strand of the
conveying means concerned is also created. In this case,
according to roller or pulley diamPter and guide height
of the strand 29a or 29b concerned of the conveying
means or profile height of -the supporting frame 3 or
arrangement with regard to height of a possi~ly pro-
vided ch~te and/or apron sheet or the like, the
- 24 -
1 covering elements 22 fixed to the supporting piece
other than as shown in Fi~. 1 - can also be arranged
running with inclination in xelation to the front
surface o -the supporting piece or o~ the supporting
frame 3 or i of its longitudinal beam section 5 pointing
up~ards or downwards.
Further, another version which still can be brought
into use alternativel~ to the previously described
covering device fixed to the supporting piece and which
is designatedias entity with 3~ and is particularly
suitable for retrofitting existing band conveying
devices with the invention is also shown in Fig. 1.
This covering device 32 consists of a.pair of covering
brackets, of which one is shown in Fig. 1. Each of the
same is fastened with its side web 31 at the side web 4
of the longitudinal beam section 5 of the supporting
frame 3 by means of screw elements, which are solely
indicated by their dash-and-dot center lines and desig-
nated with 47, engaging ïn threaded holes in this
side web 31 of the covering bracket 32 or in threaded
. holes provided in the side web 4 of the longitudinal
- profile 5 and penetrating corresponding complementarily
arranged through holes in the other web in each case
or penetrating through holes provided in mutually com-
25. plementary arrangement in both ~ebs 31, 4 lying against
. one another and which are to be joined with one another.
: A5 shown, the holes in at least.one of the webs named
can be formed as slotted holes, which are designated .in
Fig. 1 with 6~ for example in the side web 4 of the
longitudinal beam section 5. The arrangement of the
covering bracket 32 on the supporting frame 3 or on
its longitudinal beam section 5 is made expediently and
with advantage so that its top web 30 underlaps in a
supporting manner the strand concerned o~ the conveying
means 29, here the upper strand 29a of the same, from
its lower side.distant from the co~veyed product. As
shown, the top web 30 of the covering bracket 32
possesses an extension tongue 30a extending in the
- 25 -
l direction of the adjoining roller or pulley or of
a possible roller or pulley set, with which the
most endangered region of the intermediate space
40 to ~1 to be protected is covered over. The
attachment of the covering bracket 32 taking place
by slotted holes 6 to the supporting frame 3 or to
its longitudinal beam section 5 makes it possible
to adapt itself by corresponding displacement of the
covering bracket 32 in the frame longitudinal direction
A relative to the supporting frame 3 to any offsetting
movements of the roller or pulley axis and thus also
of the roller~s) or pulley(s) relative to the adjoining
approach or runoff front edge of the supporting frame 3
affected for example by necessary retensioning
measures for the conveying means 29, so that good
protective covering of the access-endangered inter-
mediate space 40 or 41 is always guaranteed.
It is apparent that in the same manner covering
devices fixed to the supporting piece can also be
formed in that the supporting pieces concerned, for
example 13 and/or 23, do not need to possess the
single piece shaped on covering members 22 described
' previously, but can ~e equipped with covering brackets
- fastened detachably to them in the manner of the
covering brackets 32 described, which are fastened
withladvantage in the described manner to the in each
' , case associated supporting piece and can possess an
extension tongue similar to the extension tongue 30a
of the covering bracket 32 extending in the direction
of the roller or pu,lley arrangement supported by the
said supporting piece and/or extending in the direction
of the supporting supporting frame paxt, e.g. of the
adjoining frame longitudinal beam 5. Such a version
- 26 -
1 is obviously suitable with advantage for retrofitting
purposes on conventional versions of band conveying
devices.
This design version according to Fig. 2 corres-
ponds essentially to that according to Fig. 1, where- ¦
by solely as example the version corresponding to the
left supporting piece 13 of the roller or pulley bearing
device of the same is shown with a takeup hole desig-
nated here with 56 for the roller or pulley set axle,
but the supporting piece 53 reproduced here could in-
stead of this ~lso have been equipped with a takeup
slot in the same manner as is the case in the suppor-
ting piece 23 according to Fig. 1 and is described
for this above. The vPrsion according to Fig. 2 differs
from the previously described versions by the fact
- that the supporting piece 23 shown here possesses
covering members 2~a and 22b both for the forwards
running and for the backwards xunning strand of the
conveying means 29. These apporximately ear-shaped
~o covering elements 22a, 22b are arranged in the same
manner as is shown in the case of the covering ~lements
22 of the supporting pieces 13 and 23 according to
Fig. 1, with their external surfaces in alignment with
the upper and lower front side surface of ~he supporting
piece 53. However, they could also be arrangeci at a
distance Erom the respectively adjoinin~ front side
surface of the supporting piece 53, whereby, however,
this distance should be prefera~ly the same, in order
to guarantee the use of such a supporting piece versior
for both supporting frame sides a~d thereby to avoid
ri~ht hand and left hand versions for the beariny
supporting pieces. The aligned version sho~n in Fig. 2
is also suita~le and provided for use on both sides.
Compared with the supporting piece versions 13 and
23 according to Fig. 1, the ~upporting piece 53 accor-
ding to Fig. 2 also differs in that its central web 54
does not extend beyond the front side close to the
supporting frame of the approximately ear-shaped co~eri~g
members 22a, 22b. The reason for this is`tnat the
.
- 27
i
1 version according to Fig. 2 is provided for faste-
ning to the supporting fr2me 3 or to its longitudinal
beam section 5 overlapping the associated front end
of the supporting frame 3 or of its longitudinal beam
section 3 or capable of being fixed on its inside.
For this reason it possesses instead of a fastening
slot 15, which by the way by all means could also
ha~e found use here, to rows of slotted holes 55,
through ~hich screw elements are to be pushed, which
either engage in threaded holes provided in corres-
ponding arrangement in the associated supporting frame
section or else pass through holes provided in-corres-
ponding arrangement and by means of which the suppor-
ting piece 53 can be fastened to the supporting frame
3 after selection of the suitable working position by
displacement in the longitudinal direction of these
slotted holes 55 in the said supporting piece 53.
Corresponding re-tensioning measures or adjusting work
can be performed extremely simply in the same mann~r.
However, lt must be emphasized that a version according
to Fig. 2 can also be equipped with guide pieces accor-
ding to thè type of the guide pieces 14 and 24 o the
supporting pieces 13 and 23 respecti~ely accordin~
to Fig. 1 extending beyond the front surface of the
covering members 22a, 22b on the supporting frame side.
In this case, if it should appear to be desira~le that
the length of these guide pieces is not chosen parti-
cularly long, eith~r the covering elements 22a and/or
22b can possess corresponding engagemen~ slots for
the side webs 4 o longitudinal beam sections 5 formed
C-shaped of the supporting frame 3 or else these side
webs can possess corresponding engagement slots for
~he co~ering elements 22a and/or 22b, in order to
guarantee sufficient size of the possible relative
displacement distance of the supporting piece and
supporting frame. The same applies in general for the
~ ~v~
- 2~ -
l support~ng pieces 13 and/or 23 according to Fig. 1
and the adjoining front ends in each case of the
longitudinal beam sec~ions 5. In g~neral the side
webs 4 in the end regions on the front side can also
be notched to corresponding length or removed.
In ~he design example shown in Fig. 3, lt ls
a question of a covering device in the shape of a
covering bracket 63 with covering members 22a and 22b,
which extend away from a central web ~4 in the same
.; lO manner as is described previously for the design
example according to Fig. 2. This covering b.-acket 63,
which can be desi~ned with advantage as sheet pressing,
in order tQ offer particularly economically a component
of low weight which can be manufactured simply and
quickly and brought conveniently and rapidly into a
working posi~ion, possesses in similar arrangement as
already described for the version according to Fig. 2
two rows of slotted holes 65. Obviously this version is
equally suitable in particular for retrofitting pur-
pGSes on existing belt conveyors of convent~onal design,
in that ln kha access-endangered regions the covering
-angle piece 63 can be astened from the outside over-
lapping the associa~ed frame section or else the sup-
; porting piece or else it can be astened to ~he said
frame section so that its approximately ear-shaped
covering member 22a covers protectingly the access-
enclangered intermediate space 41 in the region of the
upper strand 29a of the conveying means 29 and its
co~ering member 22b covers protectingly a corresponding
access-endangered intermediate space in the region of
the lower strand of the same. Here as well, the covering
me~bers 22a and/or 22b could basically be formed with
extension tongues extending over the front edge of the
central web 64, but the manufacture of this version
29 -
l would become more expensive in this way, without a
significant advantage being achieved compared with a
corresponding enlargement of the total length of such
a part.
In general reference i~ also made to the fact
that the versions accordlng to Fig. 2 and 3 are par-
ticularly suitable for use in conjunction with sup-
po~ing frame versions with so-called open one part
C section, which is also designatecl as so-called
half box section, although they are not limited to
such an appiication, hut can also find applica ion
in connection with supporting frame versions o~
longitudinal beam sections connected wi~h one another
and stiffened by cross beams as for example accordin~
to Fig. 1.
The version according to Fig. 4 designed for
band conveying devices formed with kinks along the
path o the strands corresponds in principle to the
one according to Fig. 1, whereby nevextheless`the
'regions of outer p~rt 3.3 and inner part 34 of the,
kinking ~itting according to Flg. 4 corxesponding to
the reyions of ~he bearing support pieces 13 or 23
according to Fig. 1 supporting the roller or pulley
'' axle or shaft are formed in a customary manner, in that
' they possess a.common drilled hole 37 for the passage
of a swivel axle to be designed in a conv'entional
. manner ,(not shown) and a slot 36 shaped as an arc of
. a circl~ concentric'to its central point or axis of
, rotation, through which a screw element which is not
shown,engages in a conventiona]. mann'erj by means of
which the outer part 33 and inner part 34 of this
kinking itting can be fastened to one another in the
angular arrangement selected a~ working position. The
outer part 33 is equipped similarly to the supporting
piece 23 accoxding to Fig. 1 with guide pieces 34 and
a fastening slot 35 between these as well as with a
side projection 27 extend'ing away to the outside with
a threadecl hol.e 28 for the acceptance o~ a screw
- 30 -
1 element, by means of which the entire kinking fitting
can be held relatively displacable and in the desired
working position ln relation to the supporting frame
part or section associated with the outer part 33 of
~he same. ~he inner part 34 of this kinking fitting i~
equlpped in a similar manner with gui~e pieces 44 and
with a fastening slot 45 between these and could
equally possess a side projection 27 extending away
to the outside with threaded hole 28 like the outer
part 33, or else just as with the latter projections 17
extending downwards with threaded holes 18, like that
shown in the case of the bearing supporting pieces 13
and 22 according to Fig. 1 and as is already descrihed
previously. The inner part 43 is moreover - as shown -
formed by means of an offset web 46 so that its guide
pieces 44 lie in the same outer plane as the guide
pieces 34 o the outer part 33 of the kinking fitting
or the guide pleces 44 and 43 of the inner and ou~er
pa~t of the same are in alignment with one another.
This has the advantage that the supporting frame struc-
ture can be designed in the same manner on both sides
of the kinking fitting.
The inner part 43 just as the outer part 33 of the
kinking itting according to Fig. 4, of which naturally
a complementary counterpart is provided on the opposite
supporting frame side, possess in each case an approxi-
mately ear-shaped covering member 22 extending in the
direction of the supporting frame central longitudinal
plane m i~ the same manner as described for the versions
accor~ing to Fig. 1 or 2 and 3. Here it also applies
that when - as shown - the guide pieces 44 or 34 are
not longer in the supporting frame longitudinal direction
than the covering members 22/ either the in each case
~..2~63~
- 31 -
1 associated supportlng frame longitudinal beam
profiles 5, insofar as these should be formed as C
or other independent hollow section, possess guide
slots or corresponding recesses for the acceptance
of the covering members 22 o~ else these possess
corresponding acceptance slots for the engagement of
corresponding web regions of the associated suppor~ing
frame longitudinal beam section. Such slots in the
covering members~22 are~ however, not shown in Fig. 4,
since the kinking fitting of a kinking fittiilg pair
of a band conveyor with kinks along the path of the
strands is designed for use in connection with a
supporting frame design which is a slngle piece in
cross section in the shape of a ~ or C section. However,
it must be emphasized in general that the guide pieces
44 of the inner part 43 andJor the guide pieces 34
o~ the outer part 33 of the kinking fitting can possess
lengths projecting in the same manner beyond the front
surface on the supporting frame side o~ the associated
- 20 covering member 22, as is shown in ~he case of ~he
bearing supporting pieces 13 and 23 according to Fig. 1
and is d~scribed previously for these just as fQr the
version according to Fig. 2.
Apart from the different design possibilities for
the s~pporting frame structure, ~ig. 6 shows two
other preferred design versions of covering devices
according to the invention~ Thus a covering member 42
is shown in the lower half of Fig. 6 which can be
formed as angle plate, in order to co~er over protecting
a~ainst unauthorized or inadvertent access or drawing
in of clothing or the like an open and correspondingly
access-endangered intermediate space 41 between the
rame side region/ like this formed by the longitu-
dinal beam formed as hollow section 8, and the front
side sur~ace or side edg~ of the strand 29a of the
conveying means. In this case it must be pointed out
- 32 -
1 that for example the hearing device for a deflector or
feeding or delivery roller or a corresponding pulley
~et is located to the right of the covering member 42
shown without itself being shown, in that this 1s held
either directly in the supp~rting frame end or capable
of rotation by interposition of corresponding suppor-
ting pieces of a bearing device, which equally or
reasons of better clarity are not shown and can be
equipped in any desired manner, and that, joining on
the left side onto the covering member 42, a cover '~
of the intermediate space 40 between the two suppor-
ting frame sides or longitudinal beam sections 8
lying opposite one another is provided in the shape
of an indeed not shown bridging apron or supporting
plate, which is fastened b~tween the two opposite
supporting frame sides or longitudinal beams 8, under-
lapping the strand concerned of the conveying means,
here the upper strand 29a shown fragmentarily. The
angular covering member 42 is held de~acha~ly to the
'20 supporting frame 3 by means of two pins 11a,which
engage in corresponding accepting holes in the asso-
ciated longitudinal beam section 8, which because of
the design of the same as hollow SeGtiOn can be
lined expediently with a bush 10.'In this case its
width extension is 'selected so that its angle web
pointing downwards (shown in the lower half of Fig. 6
by a broken line) remains at a distan'ce 39 which is
not dangerous for unauthorized or inadver'tent access
to the front side surface or edse of the strand con-
cçrned of the conveylng means, here for example the
upper strand 29a of the conveying means 29, which how-
ever guarantees adequate movement play to the said
strand.
However, a further design version designated with
42a is also indicated in dash-and -dot lines in the
lower half of Fig. 6, in which the covering member
e~tends down to below the strand concerned cf the
conveying medium, for example, the displayed upper
.
- 33 -
l strand 29a. In this way the same effect is reached
as for example in the cas~ of the covering members
22 or 32 according to Fig. 1. In this case the cove-
- ring member 42a can be formed by a correspondingly
arranged T section held fixed to the supporting
frame by the two pins 11a or else also by an angle
section, which is held fixed to the supporting frame
according to the manner of the covering bracket 32
accordin~ to Fig. 1. But a U section arranged with its
inside region opening downwards can also be used,
this being the case both in the version designated
with 42 and in the version ~esignated with 42a. In
both cases it would be preferable solely to drill
-through ~he one side flange of the U section, in order
to b~ able to pu h a pin 11a through this, whic~ could
push up against: the inside of the opposite side web
of this section and b~ fastened there and/or on the
inside of the hole penetrated by it by welding, for
example by means of a few spot we1ds.
Another preferred design version o the invention
is illustrated in the upper half of Fig. 6. It is true
- that here the supporting frame is shown in the shape
of a piece of a longitudinal beam 7 ormed as solid
part~ but the supportin~ frame 3 could also be deslgned
~5 without difficulty as hollow section 3, as for example
in the lower half of Fig. 6, or as ~ section, as in
Fig. 1, or else in the shape of another section which
is not shown, or example also o a~C or U sect.ion in
one piece in cross-section wlth side webs forming the
supporting frame sldas. In ~ac~ case, an accepting or
socket hole 9 for the pin 11a oE a supporting rod 11
with which a covering member 12 is connected possibly
by langing round, as i5 shown for example in ~ig.5,
and where necessary by appropriate fastening ~y m~ans
of cementing, pinching~ welding, brazing or ~he li~e
3~ -
l is provided at a suitable place of a web or flange
of the supporting frame structure approximately
parallel to the frame central longitudinal plane m.
This supporting rod extends bxidging ove~ the entire
intermediate space 40 between the two opposite suppor-
ting frame sides or longitudinal beams 7 over practi-
cally the entire conveyor width, and its pins 11a are
inserted in the accepting holes 9 on the supporting
frame section side, which in the case of a hollow
sectional design, as sho~n in the lower hàlf of Fig. 6,
can be expediently lined with a bush 11a. The supporting
rod 11 supports in this case a single piec~ covering
member 12 overlapping the entire stated intermediate
space 40 except for a movement play 39, which is
shown in the upper half of Fig~ 6 or else narrower
covering members fastened close to the s-1pporting frame
in appropriate arrangement. The special feature of this
design is that here the covering member 12 is not held
in a predetermined position by t'ne measures depicted
or by other measures, but possesses the degree of
freedom to be able to swivelrelati~e to the structural
part supporting it. Apart from generally exlsting
manu.acturing engineering and assembly adva~tages,
this can also be accompanied ~y further design simpli-
fications and operat.ing simplifications. It is narnely
apparent that such a design needs solely to be insexted
with.the pins 11a of its supporting rad 11 in a straight
- hole usually present in conventional band con~eyo~
devices or a hole lattice arrangement in the supporting
fram~ side wall without making it necessary further
work intensive measures, if care is taken that the
length of its covering member 12 is so large that th.is
- 35 -
1 is supported by a cross beam 25 connecting two opposite
supporting frame longitudinal beams 5 or 7 or 8 with
one another, so that its tail end formed by a flag-
llke extension cannot fall downwards ~nd get into
conflict with the lower strand 29b of the conveying
means 29.
It is indicated by solid lines in the upper half
of Fig.. 6 that the covering member 12, which here needs
in no way to serve as support for the adjoining strand
" 10 of the conveying means 29, for example of its upper
strand 29a, but can do this with corresponding design,
possesses a tail region 12b extending away in the
direction of the adjoining roller or pulley arrangement
solely in the central region of the intermediate space
40 between the two supporting frame sides or longi-
tudinal beams 5 or 7 or 8. However, it is also indicated
by a dot-and dash line, that the 1ag region locat~d
between this and the central region of the covering
- member 12 bounded by a solid line needs in no way to
be notched or removed, but that rather the covering
member 12 can extend over its entire leng~h with un-
changed width.
Whilst it is fund~nentally illus-trated in Fig. 6
that and how such covering members 42 or 12 can be
held on the supporting frame side to a part remaining
, '' ' stationary of the supporting beam 3, for example to a
longitudinal beam section 5 or 7 or 8 of the same, Fig.
shows that in the same.manner this is also possible by
attachment to a supporting piece or a supporting piece
pair,of a roller or pulley bearing. In Fig. S is shown
by way of example a supporting rod 11, which is supported
in a supporting piece 13 of a bearing device for a
roller 20 with axle or shaft 21 capable of swivelling
relatively close to the upper strand 29a of the con-
veying means 29 and which possesses a covering member
. 12c which is offset in a suitable manner ln order to
bring a tail region 12c of sufficient length to come
- 36 -
-l to rest on a cross b~am 25. However, a supporting
rod 11, which supports a covering member 12, the tail
part 12d of which is angled approximately Z shaped
and possesses a free end region of sufficient length
in order to be suppor~ed by a cross beam 25~ in the
design example shown the same cross beam which also
supports the covering member 12 with the tail Pnd close
to the upper strand is also shown likewise astened
to the supporting piece 13 capable of swivelling close
to the lower strand. It is obvious that in this design,
for which in general the same applies with regard to
the type of fastening as already described previously
for the two design versions according to Fig. 6~ the
covering members 12, since they are supported by a
supporting piece 13 of a shaft or pulley bearing device,
follow in the direction of the double arrow A, as
could be the case for example in the course of adjust-
ment or retensioning measures, any possible offset
movement of the roller or pulley axle 21 relative to
the front edge 38 fo~ming the runof or approach edge
of the supportin~ frame 3, which may with regard to
association correspond to the inside or outside of
the free shank of the supporting bracket 19 according
to Fig. 5, without in this case exposing in any way
at all-the access-endangered intermediate space 41
to be protected, since the coveriny members 12 possess
- adequate tail lengths supported by the cross beam(s)
25~ with which they are guided and supported capable
of movement sliding on the cross beam concerned.
- Without this being shown, however, a attachment of a
previously descri~ed covering member 4~ in the manner of
the lower half of Fig. 6 is also possibl~ without diffi-
cult~ even when supporting the same by a supporting
piece of a roller or pulley bearing device relatively
displacahle in relation to the supportin~ frame 3.
~- 37 -
l If in this case it still possesses -tongues extending
in the longitudinal direction approximately in the
manner of the extension tongue 30a of the covering
bracket 32 according to Fig.1, then h~re as well com-
plete coverings of the access-endangered intermediate
space 41 can be accomplished constantly independently
of the displacement position of the roller or-~pulley
axle or shaft 21 relative to the adjoinin~ end of the
supporting frame 3 or of its approach or runoff edge
38 ~or the associated strand of the conveying means.
In aonclusion reference must still be made to
the fact that indeed not for the upper strand 29a
of the conveying means 29, which is loaded on its
outer side with conveyed produc~, but certainly for
the lower strand 29b of the conveying means 23, the
coverin~ device ~ or 12 or 22 or 32 or 42 or 42a
respectlvely can be arranged so that it protects the
access-endangered intermediate space either on the
- outside or else on the inside or else should the
occasion arise also overlapping both sides, whilst
for the upper strand 29a of the conveying means 29
only a protection on its lower side can come into
question. For design verslons of the invention, in
which for the purpose o avoiding right hand and left
hand version of individual components, such as for exampl~
supporting pieces of a roller or pulley bearin~ device
holding covering members, avoiding versions of thèse
components are envisaged, therefore practically only
one such design of the same can come into question in
which both for the upper. and for the lower strand 29a
or 29b respectively of the conveying means 29 the
associated covering member is arranged undexlapping this,
i.e.placed on its inside~
In ~eneral, although it has been displayed and
explained solely by reference to some preferred design
examples, the invention is not restricted to these,
but rather manifold possibilities are open to the
expert to adapt them by other combination o~ their
\
-38-
features or replacement of the same against
equivalent means to the most widely different
circumstances of a material and/or production
engineering and/or design or application induced
nature and/or the requirements of the individual
application, without department because of this
from the framework of the invention.
R e f e r e n c e s y m b o 1 1 i s t
============ ~
1 = Band conveyor
2 = Covering device
3 = Supporting frame
4 = Side web of a longitudinal beam
4a = Outer plane of the side web
5 = Longitudin~l beam of the supporting frame
6 = Elongated hole
7 = Solid section
8 = Hollow section
9 = Insertion hole
= Insertion bush
11 = Supporting rod
lla = Pin
12a = Flag-like extension of the coverlng member
in the side region
12b = F`lay-like extension of the covering member
in the central region
12c = Offset end of the covering member
12d = Offset end of the covering member
13 = Supporting piece of a bearing device
14 = guide piece of the supporting piece
= Fastening slot
16 = Axle accepting hole
17 = Projection
18 = Threaded hole
19 = Supporting bracket
= Deflector roller for conveying means
21 = Axle or shaft of the deflector roller
22 = Shaped covering member
22a = Covering member on the upper strand side
22b = Covering member on the lower strand side
23 = Supporting piece oE a bearing device
24 = Guide piece of the supporting piece
- 25 = Cross beam
26 = Axle accepting slot
27 = Side projection
28 = Threaded hole
29 = Conveying means
29a = Upper strand~of the conveying means
29b = Lower strand of the conveying means
= Top web of the covering bracket
30a = Extension of the covering bracket
31 = Side web of the covering bracket
32 = Covering bracket
33 = Outer part of a kinking fitting
34 = Guide pieces of the outer part
= Fastening slot
36 = Circular arc slotted hole
37 - Swivel axis hole of the kink.ing fitting
38 = Runoof or front edge of the supporting frame
39 = Distance for movement play
= Intermediate space between longitudinal beams or
the like
., ' ~
4l = Accass-endangered intermediate space
42 = Detachable covering member
42a = Lateral extension of the covering member
43 = Inner part-of a kinking fitting
44 = Guide piece of the inner part
= Fastening slot
46 = Offset of the inner part
47 = Extension of the covering mem`oer overlapping the
conveying means
53 = Supporting piece with shaped op covering member
on the upper and lower strand side
54 = Central web of the supporting piece
= Elongated hole
63 = Covering hood for supporting frame
64 = Central web of the covering hood
= Elongated hole
