Note: Descriptions are shown in the official language in which they were submitted.
:
`' r~373~a
LOUVERED ROLL SHUTTER
The invention relates to a louvered roll shu$$er with at least one
pull chain, the chain links of which are articulated to one another
and to lamellar louver slats that can be louvered, and with at least
one adjusting chain, the chain links of which are articulated to one
another and to the louver slats, whereby the roll shutter is guided by
the pu}l chain links in the fixed guide profiles.
Such roll shutters have been known, for example, from
EP-A-330,192, and DE-A-34 37 346. A similar roll shutter is also
known from EP-A-189,091. However~ the louverable slats thereof
are guided by way of slot chain links in the fixed guide profiles.
In the manufacturing and installation of roll shutters, several
tasks are always to be accomplished at the same time. Firstly, the
shutter slats with the associated pull and adjusting chain links are to
exhibit a maximally constant cross sec$ion over $he entire width of
the roll shutter in order to ensure a safe and compact rolling up of
the roll shu$ter in the shutter housing. Secondly, there is to be a
minimum number of gaps between the individual components and
the fixed *acts wherein the roll shutter is guided in order to prevent
peeping in, penetration of, for example, water or dust, or the attack
of burglary tools. Thirdly, the outside face of the closed roll shutter
is to have a maximally uniform and even and thus pleasant
appearance.
Under these viewpoints, the roll shutters known from EP-A~
330,192 and DE-A-34 37 346 exhibit substantial drawbacks.
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Another task is to be able to manufacture the roll shutters in a
maximally compact and economical fashion. This means that the
pull chain and, in particular, the adjusting chain are arranged if at all
possible at the rim of the roll shutter and with the use of a minimum
number of parts and that the louver slats are machined as little as
possible and as a consequence are not weakened in partial regions.
In this respect, the roll shutter known from EP-A-189,091 has
the disadvantage that, for connecting the pull chain links with the
connecting supports, there either are sectional slats provided or the
slats must be equipped with appropriate cutouts for the pull chain
links and~ respectively, the adjusting elements.
It is an object of the invention to indicate a louvered roll
shutter avoiding the aforedescribed disadvantages of the prior art.
According to the invention, this object has been attained in a
roll shutter of the above described general type by the feature that
the adjusting chain links overlap the pull chain links, and that the
joints or part of the joints between pull chain links are located on
that side of the joints of the adjusting chain links which is directed
away from the fixed guide profile.
ln order to eliminate the aforedescribed problem of gap
formation between individual parts, in the discussed instance, for
example, between the louver slats and the adjoining pull chain links,
the provision can be made according to this invention that the louver
slats overlap at least partially the pull chain links.
As known per se from the state of the art, the
invention can be further developed by locating the connecting joints
between the pull chain links and the louver slats in the zone of the
upper longitudinal rim of the louver slats and/or by positioning the
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connecting joints between the adjusting chain links and the louver
slats in the region of the lower longitudinal rirn of the louver slats.
According to an especially preferred embodiment of the
invention, the latter can be characterized in that the joints of the
5 pull chain links are flush with the joints of the adjusting chain links
in the closed condition of the roll shutter. In this way, the roll
shutter can be rolled up in the shutter housing without any
problems and without tension.
According to this invention, one of the two hinge eyes
10 of the pull chain links and, respectively, adjusting chain links is
preferably a slotted hole. This embodiment ensures that the louver
slats, after they have been pivoted downwardly, i.e. closed, can be
~shifted even further toward one another so that it is possible, inter
alia, to lock the leaf-like louver slats by way of suitable devices to
~ ~ 15 be described hereinbelow and secure them against unintentional or
`~; ;; forcib!e outward swing.
Since there is a constant desire for reducing the number
of pa~rts for louvered roll shutters and for simplifying the installation
thereof, the provision can be made according to an especially
~; 20 preferred embodiment of the invention that the joints between the
pull chain links and/or the adjusting chain links are constituted by
profiled guide means arranged at the pull chain links and,
respectively, adjusting chain links, the pull chail1 links and adjusting
chain links, respectively, being conl1ected with one another by way
25 of these guide means.
~ ~ 2137350
Joints and connecting hinges formed by profile guide -
means exhibi~ the great advantage that no pins or axles are required
for creating the joints whereby, on the one hand, the number of
, .~ . .~, -
components is reduced and, on the other hand, the assembly of the
components is simplified. The individual parts need merely be
hooked one into the other by way of the profile guide means whicll
can be constructed similarly to the conventional tongue-and-groove
system, or be inserted one in the other in the longitudinal direction
. . .
of the louver slats. -
An especially simple connection of the louver slats with
the pull chain links can be characterized in that the connecting ;~
hinges between the louver slats and the pull chain links are
....
arranged one below the oth~er approximately below the connecting
hinges between the respective pull chain links. The particular
advantage of this embodiment resides in that the connections
~: between the louver slats and the pull chain links do not affect or
interfere with~the connections between the pull chain links with one
another whereby the manufacture of the individual components as
well as the assembly of the roll shutter are simplified.
Also when using profiled guide means as the connecting
hinges and joints, it is advantageous if, as described hereinabove,
the louver slats, after closing, can be additionally shifted toward one
another in order to lock the lamellar louver slats in place. This is
ensured according to one embodiment of the invention by
fashioning the connecting hinges between the pull chain links and
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the adjusting chain links to be movable in~ the direction of
movement of the roll shutter.
In order to secure the louver slats against unintentional
or forcible swinging open, the provision can be made according to
5 the invention that a groove is arranged at the lower longitudinal rim
of the louver slats and/or of the adjusting chain links, this groove
cooperating, in the closed condition of the roll shutter, with a web
provided in the zone of the upper longitudinal rim of the pull chain
Iinks or of the louver slats and/or of the adjusting chain links, or that
l 0 webs are provided at the lower longitudinal rim of the louver slats
and/or of the adjusting chain links, these webs cooperating in
shape-mating fashion with webs of the neighboring pull chain links
or louver slats and/or adjusting chain links in the closed condition
ofthe roll shutter.
1~1s~ ~ ; Roll shutters are customarily guided along their lateral
edges in fixed track profiles attached to the apertures to be closed
.
. :up.
,
According to the invention, the provision can be made
for this purpose to arrange an extension at the pull chain links, by
20 way of which the pull chain links, in the installed condition, are
; guided in fixed track profiles.
One problem arising, in particular, whell old roll shutters
are replaced by new ones Is that the new roll shutters do not fit into
the existing, fixed track profiles because they are either too wide or
25 have too much clearance in the track profiles. In order to overcome
this problem, the invention suggests to arrange sliding elements on
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21 3 73 5 0
the extensions, the thickness of these elements being adapted to the
groove width of the fixed track moldings.
One problem encountered when installing roll shutters
especially into very wide openings such as, for example, shop
5 windows is that the louver slats can sag on account of their inherent
weight whereby safe functioning of the roll shutter is no longer
ensured. Furthermore, especially in case of very broad building
wall apertures, the strength of the louver slats becomes so low that
protection from burglaries is then very much diminished.
In order to solve this problem, it is suggested according
to this invention to have the pull chain links extend over the entire
width of the roll shutter. The pull chain links create, so to speak,
a i'fundamental roll shutter" which can be designed in
~correspondence~with the desired strength requirements;the louver
15 ~slats can optionally be supported in this fundamental roll shutter
o ver their entire length whereby the problem of unintentional
sagging of the louver slats as well as the low strength against break~
ins has~been solved.
In order to ensure adequate see-through capability with
20 the louver slats being opened, especially in case of puli chain links
that extend over the entire width of the roll shutter, the provision
can be made tliat the pull chain links exhibit perforations bounded
by webs. The width of the webs and of the~perforations between
t he webs can be designed in correspondence with tlie respective
25 requirements.
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, 2137350
According to another embodiment of the invention, for
solving the aforedescribed problem, the provision can be made that
the pull chain links consist of profiled rods extending in the
longitudinal direction of the louver slats, these rods being connected
5 with one another by way of webs. The advantage resulting from
this feature is that the profiled rods can be manufactured as
semifinished parts in any desired length, are cut off when needed
in a length corresponding approximately to the width of the roll
shutter, and can be connected by means of an arbitrary number of
10 webs of the desired width so that maximum flexibility is afforded
with regard to the width of the roll shutter and the strength of the
pull chain links determined by the shape and number of the webs
As mentioned in the foregoing, it is desirable for the total
cross section of the louver slats to be as constallt as possible over
15 the total width of the roll shutter. For this purpose, it is necessary
for the joint total cross section of the pull chain links and of the
adjusting chain links to correspond, in the closed condition of the
:
roll ~shutter, substantially to the cross section of the louver slats.
According to the invention, the roll shutter can be
20 designed in this case so that free spaces are provided at the pull
chain links accommodating, in the closed condition of the roll
shutter, the conllectillg hinges of the adjusting chain links and
optionally of the sliding chain links. No dimensioning problems are
-~....
thereby encountered whell designing the connecting hinges and the
25 pull chain links since these do not interfere with one another.
.....
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~ 2137350
.. ~ ...................................................................... ..
In case of the connecting hinges designed in profiled
fashion, it is advantageous to secure the thus-joined parts against
shifting relatively to one another in order to ensure functioning of
the roll shutter without complaints. ; `;
S For this purpose, according to one embodiment of the ~ ~;
invention, the provision can be made that, in the connecting hinges
designed with a profile, one part carries a cutout and the other part I
carries a tang which latter can be bent into the cutout. This
embodiment, by the way, not only ensures safe functioning of the
1 0 roll shutter but also provides simplified installation since these parts, ~; -
after assembly has taken place, can no longer shift with respect to -
one anotherduring further installation. -;
.,.
In order to trigger the shuttering step, one embodiment
of the invention provides that an angular part is pivotably mounted
~15 ~at the uppermost louver slat or at-the uppermost member of the
louvering chain which part can cooperate with a hook-shaped,
stationary part. ~ `
~; ~ According to an advantageous embodiment of the `
invention, ~the provision can be made herein that the hook-shaped
~ .
part exhibits a hook at its lower end, that it has a vertical,
downwardly open slot exhibiting at its upper end a passage hole for
the angular part, that the passage hole is covered at least in part by
: ~ flat springs, and that it has flat springs inclined frol~ the hook
obliquely downwardly toward the roll shutter, these flat springs
forming between them an extension of the slot. ;
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2~;3~7350
According to another preferred embodiment, the
provision can be made that the hook-shaped part is fast-ioned to be
resilient and has, in its upper zone, a horizontally extending slot,
that the lower rim of the slot is formed by a deflecting member
S pointing obliquely upwardly awayfrom the roll shutter, and thatthe
upper rim of the slot is formed by a guide-in member projecting
obliquely downwardly away from the roll shutter, this guide-in
member projecting past the deflecting member, this embodiment
being distinguished by its special simplicity.
10As mentioned above, the shape of the louver slats as well
as the design of the chain links have a substantial effect on the roll-
up diameter of the roll shutter when rolled up in the shutter
housing. However, the roll diameter can be affected not only by
the~ structural design of the louver slats proper but also by the shape
15of the shah on which it is wound up in the shutter housing. ~`
According to a preferred embodiment of the invention, the provision
can be made for solving this problem of providing a shaft for
winding up~the roll shutter wherein the outer radius of this shaft,
measured from the axis of rotation of the shaft, is smaller in a
20 certain zone than along the remaining periphery of the shaft.
In this zone, closer to ille axis of rotation, the uppern~ost i ` - -
and/or first slat is located when the roll shutter is being rolled up.
On account of the configuration of the shaft according to this
invention, the bulge, known from the state of the art, is avoided
25 which arises when the first louver slat, after the initial winding lap,
is covered by the subsequent lap, since in the invention the coiling
g ... , .. ,., ,~
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2 1 ~ 7 ~ ~0
diameter of the roll shutter increases continuously rat!-er than jump~
like while the roll-up step covers the first slat and the subsequent
slats, inasmuch as the first slat is positioned radially farther toward
the inside
Accordingto a preferred embodiment ofthe invention,
the provision can be made that the shaft has an approximately ~;;
polygonal cross section, and that one side of the polygon is in
closer proximity to the axis of rotation of the shaft than the
rema~ining sides of the polygon By this measure, the outer contoùr
of the wound-up portion of the roll shutter can be still further
smoothed out ` -;
T he provision can be made according to an
advantageous further development of the inventioll that inwardly
projecting webs are provided at the shaft, the inner surfaces of these ;~
webs Iying on the circumference of a circle the center of which is
congruent with the axis of rotation of the shaft In this way, a drive
motor can be mounted, for example, eccentrically in the shaft so
that~the shaft, when the motor is in the driving mode, moves
eccentrically about the axis of rotation of the motor 1~ 1
In accordance with another preferred embodiment even
a relatively large motor can find accommodation in the shaft, the
shaft bearing being arranged eccentrically in the shaft and,
respectively, with regard to the motor bearing, by the provision that
the shah exhibits an inner diameter determined at least in part by ;
webs projecting from the shaft inwardly, the center of this inner
diameter Iying eccentrically to the axis of rotation of the shaft
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An especially simple attachment of the slat to the shaft
is made possible by providing a groove in the shaft extending in the
longitudinal direction of the shaft; this groove can receive a pin or
the like for attaching the roll shutter to the shaft.
The provision can here be made according to the
invention that the uppermost and/or first slat of the roll shutter is
connected to the shaft by way of a flat spring or the like, offering
the advantage that the first slat need not be fastened directly to the
shaft.
In accordance with another preferred embodiment ofthe
inventionj the provision can be made that the flat spring is attached
in the groove of the shaft by way of a pin or the like and coils
around the shaft approximately once, this version offering the
adyantage that the length of the roll shutter taken up in the shutter
l S housillO in the completely lowered condition of the roll shutter andthus not being visible need not be constituted by expensive as well
as~bulky slats. ` - -
Additional features and advantages can be seen from the i`~
dependent claims and the following description of embodiments of
the invention with reference to the drawings wherein: --
Figure l shows an embodiment of the invention in an ; ~ `
oblique elevation and in a sectional view, ~,','."''!'',~'~,`'''''.'`~''`''
Figure 2 shows a section through a roll shutter slat along
line ll-ll in Figure 3, the portion of the louver slat invisible on "~,~.!, ~',
1 . '~ ~,', ' ;
25 accountofthe section taken being denoted bydot-dash Iines,
-- 1 1 --
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21~7350
Figure 3 shows a section through the roll shutter slat
along line lll-lll in Figure 2,
Figure 4 shows a view of the roll shutter slat from the left
in Figure 2 in an embodiment slightly altered as compared with
Figure 3,
Figure 5 is a section through the roll shutter slat along
line V-V in Figure 2,
l~igure 6 is a section through the roll shutter slat along
line Vl-VI in Figure 2, -
Figure 7 is a section through the roll shutter slat along -
line VII-VII in Figure 2,
Figure 8 shows part of a roll shutter according to the :
invention in a partially louvered condition,
Figure 9 shows a part of the roll shutter in the entirely
louvered, i.e. opened conditioll, but without the adjusting chain,
:: ~ Figures10andll showviewsoftherollshutterasseen
from the left in Figure 2, illustrating two different embodiments of i
sliding chain links,
:: : Figure l 2 likewise shows a view of a roll shutter from the
1 2 0 left in Figure 2 with a sliding cap,
Figures 13-34 show embodiments of roll shutters
according to this invention, the connecting hinges between the
individual components being constituted by profiled guide means,
wherein
Figure 13 represents a section througll a roll shutter slat
which cannot be louvered,
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Figure 14 shows a section througll a roll shutter slat that
can be louvered, and
Figure 15 shows a section through a roll shutter slat in
the region of the adjusting chain,
S Figure 16 shows a view from the front of part of a roll
shutter in the completely louvered-open condition and 1
Figure 17 is a section through the roll shutter of Figure ~:~
i 6: along line A-B,
: `
Figure 18 shows how the individual roll shutter slats can
be mutually pivoted andthus rolled up,
Figure 19 shows how the individual roll shutter slats can
be shifted toward one another and how the pivotable roll shutter . ` i.
slats can be secured against swinging open, `i i:
Figure 20 shows a functional sketch of the roll shutter in .~,.,.. `
15 ~ the opened condition,
Figure 21 shows a further embodiment of a roll shutter
accor Ing to this invention in a partial sectional view and in
oblique~elevation,
Figure 22 is an enlarged illustration of part of the roll -; ` .
20; shutter o f Figure~21 in an oblique elevation,
Figures 23-28 show various embodiments of the pull `~
chain links, of the adjusting chain links, of the sliding elements, and ,''~
: ~ of the pivotable louver slats,
... . , ~ , .
Figure 29 shows a further emibodimellt of tlle inventioll,
~ Figures 30:and 31 are sections through the roll shutter of
Figure 29 in the closed and open conditiolls, ` -
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~ 2137350
--.i.. , , , :
Figure 32 shows a section through the roll shutter in the : -~
closed and locked condition,
Figure 33 shows a section through the roll shutter in the
region of the adjusting chain, and ;~
SFigure 34 shows a section through the roll shutter in the `~
zone of the sliding chain in the fixed track,
Figure 35 shows a device for triggering thé louvering
process, ~
,.
Figure 36 shows the device of Figure 35 in-an oblique
1 0elevation,
Figures 37 and 38 show a further embodiment of a
device;~for triggering the louvering process in an oblique elevation
and in lateral view,
Figure 39 shows a third embodiment of a device for
5 ~ ~triggering the louvering step in an oblique elevation,
Figures 40 and 41 show a locking device for preventing
lateral shihillg of the pull chain links and:of tlle louver slats witl
; respect: to one another, in a sectional view and in oblique 1
elevational view,
20: Figure 42 shows how the: roll shutter of this:invention is
r~olled up on a shaft having a polygonal cross section, and
Figures 43 and 44 show two embodiments of shafts
;~ improved in accordance with~ this invention, a roll shutter having
been wound up onto these shafts.
25In Figure l, a part of a roll shutter slat is shown in
oblique elevational view, composed of a louverable, larnellar louver
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2~373~;~
slat 1, a pull chain link 2, and an adjusting chain link 5. As can be
seen from Figure 2, in particular, the pull chain link has at one end
bifurcate extensions 16 and at the other end a projection 17
carrying the hinge eyes of tl-e pull chain link. The pull chain link
5 2 furthermore includes an extension 6 running in the longitudinal
direction of the roll shutter slat; this extension, in the present
embodirnent, extends through underneath the adjusting chain link
- ~ 5 and up into fixed guide means, not shown, for the roll shutter
; The louver slat 1 exhibits a tang 30 and the adjusting chain link has
a tang 35j by means of whicl1 both extend over the pull chain link
2. In this way, any gap is avoided that would extend through the
entire roll shutter slat.
The puli chain link 2 and the adjusting chain link S have
cross sections corresponding together, in the conditiol1 shown in
Figure 1, essentially to the cross section of the louver slat 1. In this
~way, a constant cross section extending all the way through is
obtained for the roll shutter slat, affording advantages when the roll
shutter is wouild up onto a shaft and also offering a smooth,
~; uninterrupted surface and consequently an optically pleasing
~ , ~, . . . .
appearance. ~,
Figure 3 shows in a sectional view how a sliding chain
link 3 is placed over the extension 6 of the pull chail1 1ink 2 and is
.. ..
connected therewith in shape-mating fashion via a dovetail-like
guide. In place of the sliding chain links 3, simple sliding caps can
also be placed over the extensiol1 6. The sliding chain links 3
and/or the slip caps have the purpose of adapting the roll shutter to
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373~0
any desired groove width of a fixed track groove, provided, for
example, at the masonry of a window openillg, in order to ensure
satisfactory sliding and a noise-attenuated operation of the roll
shutter. A lateral shifting of the sliding chain links or slip caps can
be prevented, for example, by notches.
The sliding chain link 3 shown in Figure 3 exhibits at
one end a slot-shaped cutout 26 and at the other end a projection
24 which latter can be inserted in the slot-like cutout 26 of the
subsequent sliding chaill link and can be connected therewith by
1 0 way of a pi n 24 .
In the same way, the pull chain links 2 and the adjusting
chain links S have slot-shaped cutouts defined by extensions 8 and
16, as well as~ projections 9 and l 7 for connection, by way of pins
7, 19, with the neigllborillg adjustment chain links 5 and/or pull
chain links 2.
To prevent the possibility of pivoting, i.e. opening, the
louver~slats 1 and tlle ~djustmellt chain links S unintentionally or by
force, the~louver slats 1 exhibit a groove lS along their bottom
longitudinal rim; this groove can collaborate with a web 14
provided at the upper longitudillal rim of the louver slats 1. It is
necessary for this purpose that the roll shutter slats can be shifted
with respect to one anotller in the direction of movement of the roll
shutter. In order to make this possible, the pull chain links and the
adjusting chain links, as well as the optionally included sliding
chain links, exhibit on their webs 17, 9 and, respectively 24 bores
20, 2l and 22 of slotted-hole shape. The pins 7, 19 and 25,
- 16 ~
~` , 21~73~0
respectively, are displaceably received in these bores. It is thereby
possible for the pull chain, the adjusting chain and optionally the
sliding chain to be "pushed together" and consequently also the
Iouver slats 1 can be joined in tongue/groove fashion and can be locked.
S In order to simplify the assembly of the sliding chain
links 3, the slotted hole 22 in the sliding chain link 3 can exhibit a
slot 23 into which the pin 25 can be hooked in a sirnple way.
To ensure an opening up of the adjustable louver slats 1
without any problems, the provision is made according to the
i nvention that the adjusting chain links S are articulated together in
the zone of their lower end by way of a pin 12 in a bore 13 in the
adjusting chain link 5 as well as a bore 13' in the louver slat 1. In
` ~ the zone of its upper longitudinal rim, the louver slat is articulated ` to the hinge pin 7 of the pull chain links.
~ As can be seen from Figures 5, 6 and, in particular, 7,
the~pin 12 and the bores 13, 13' are spaced by the distance A from
th~e plane whereill tl1e hinge pins 7 and the siotted holes 21 lie in
the closed conditiol1 of the roll shutter. Thus, if the adjusting chain
is retained during the openil1g of the louver slats 1 and the roll
shutter is still further lowered, as will be described in greater detaii
below, then the louver slats 1 are swung upward without any
- problems due to the just-described spacing A between the pin 12
and the pin 7, on account of the lever effect.
T riggering and/or bringing aboutthe louver motion ofthe
louver slats 1 can, however, also be effected in any other desired
fashion, besides by the just-described arrangeme!1t.
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3 7 35 ~
As can be seen from Figure 3, the sliding chain link 3 ~:
has a bore 27 corresponding to the bore 13 in the sliding chain link
S. This bore 27 can be present, even though it does not actually
have a function, in case the adjusting chain link 5 and the sliding
S chain link 3 exhibit the same cross section, i.e. have been
produced, for example, with the same extrusion tool. If the sliding
chain links 3 are manufactured by means of a different tool, the
bore 27 can, of course, be omitted. In this case, it is also possible
to provide larger rounded portions along the outer edges 28 of the `
10 sliding chain links 3 in order to permit an improved sliding ofthe
sliding chain links 3 in the fixed tracks.
The pull chain link 2, illustrated, intèr alia, in Figure S,
can be used with unchanged cross section but omitting the
extension 6 also in the central zone of the roll shutter with a pull
15 chain in orderto impart higher strength to the roll shutter. In this
case, care must be taken that the cross sections of the pull chain
link 2 and of the remaining residual cross section (as in case of the
tang 30) of the louver slat 1 are chosen so that the louver slat 1 in
this region is weakened as little as possible. ~ ~
20Figures 8 and 9 show how the roll shutter of this ~ ;
invention can be opened up by louver action, the adjusting chain
having been omitted from Figure 9.
In Figures 10 and 11, the sliding cllain links 3 alid 4 of
Figures 3 and 4 are illustrated joined into a sliding chail1 wherein
25the slotted hole 22 of the sliding chain 3 has a slot 23 whereas the
slotted hole 22 of the sliding chail1 link 4 is closed up. `~
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.,2~37350
In Figures l û-l 2, the fixed guide groove 7l is indicated
in dashed lines, B characterizing a wider guide groove 71 and C .~ - .
denoting a narrower guide groove 71. .~ :
In Figure 12, an embodiment is illustrated wherein the -.-- `;
S sliding element is placed as a cap 33 onto the extension 6 of the
pull chain link 2. In order to adapt the roll shutter to the varying
groove widths B and C, respectively, the round top 34 of the sliding
cap ;33 either can be eliminated, as illùstrated in Figure 12, or can -~
be:left intact as indicated in Figure 12, in order to adapt the roll ~`-
:shutter to a broader guide groove B. ` ` ~
As can be seen, in particular, from Figures 1, 2 as well - ` -as 6 and 7, the extension 6 has a smaller width than the pull chain ; `~-
link 2 whereby vacant spaces 10 and 11 are created. The joints 8,
9; 2~6, 24 of the adjusting and sliding chain links can be -`
15~ ~ accommodated without any problems in these vacant spaces 10 and
whereby, on the one hand, no dimensioning problems arise in
the-design and arrangemellt of the joints since each roll shutter slat ` `
is~to havé the~same total cross section in this zole as the louver slat
. .,. "
1 and,:~on~the other halld, the connecting pins 19, 25 of the ~ ::
~: 20~ ad~usting chain links 5 and the sliding chain links 3 can align with ;:
the hinge or connecting pillS 7 of the pu!l chain links 2 with one : :
- another and with~the louver slats 1 whereby a joint pivoting axis is
defined for al l chain l inks.
Embodiments of the invention will be described below
wherein the joints between the individual chaill links, ~ormed by : `
: ~ . ~ ....
means of pins in corresponding bores, and, respectively, the
- 19 ~
, ~ 21373~
connecting joints between the pull chain links and the pivotable
louver slats are replaced by profiled guide means extending in the
lon~,itudinal direction of the roll shutter slats.
As shown in Figures 13 and 14, the joints between the
pull chain links 2 are constituted, on the one hand, by substantially
U-shaped grooves 40 with an inwardly bent leg 41 and, on the
other hand, by webs 42 exhibiting at their free end a hook-shaped
projection 43 which can be received in the groove 40. Connection
of~the web 42 with the groove 41 can here take place, for example,
by pushing the web 42 of a pull chain link 2 in the longitudinal
direction of the louver slat into the groove 40 of a neighboring pull
chain link 2. The pivotability of such a hinged connection is
illustrated, for example, in Figure 28.
I t can be seen that it is possible, in a very simple way,
1-5 to ~replace a hinged connection usually formed by pins in bores by
a connection which, on the one hand, requires a smaller number of
- `~parts and, on the other hand, can be mounted in a simp!er and
~,
faster fashion.
The connection of the adjusting chain links S takes place ` ~
essentially in the same way, as illustrated in Figure 15 wherein the ~ ~-
groove 40 and the web 42 are arranged at the adjusting chain links ~ ~
5. ` ~ - ;
In order to accommodate the hinged connection of the
adjusting chain links 5 at the roll shutter slat without any problems, `~
~the pull chain links 2, overlapped by the adjusting chain links 5,
exhibit in the region of the grooves 40 and webs 42 vacant spaces
~,
- 20 -
~. 21373SO . ~
j".., .~".,~, :`
10 and 1 1 wherein the hinged connections can be accommodated
without any problems. This arrangement, in turn, also ensures that - :
~ .: ., . .: ,:, .
the hinged connections between the adjusting chain links 5 are in
alignment with the hinged connections between the pull chain links
5 2 so that a smooth windup of the roll shutter in the shutter housing
is ensured.
As can be seen from Figures 13 and 14, the louver slats
1 are likewise articulated to the pull chain links 2 by way of
profiled guide means. The Joints are formed herein in a similar
10 -manner as the joints between the pull chain links 2 and the
adjusting chain links 5, on the one hand, by grooves 44 with
inwardly bent legs 45, 46 arranged at the pull chain links 2, as well
.. .. ...
as webs 47 with hook-shaped projections 48 provided at the upper
longitudinal rims of the pivotable louver slats 1. Figure 20, for
l~5 exarnple, shows in greater detail how pivoting of the louver slats 1
at the pull chain links 2 can be accomplished.
Figure 14 furthermore shows that the pivotable louver
slats 1 exhi~bit, along their lower longitudinal rim, a groove 49
extending in the longitudii1al direction of the roll shutter slat; this
20 groove is associated with a web 50 at the upper longitudinal rim of
the neighboring pull chain link 2. In this way, the louver slats 1
can be locked, in a manl1er described above, in the form of the
groove/,~ongue system against unintended or forcible opening when
- ... . ~ .:
the pull chain links 2 are pushed entirely toward one another.
25~ In order to make this possible, the grooves 40 of the
joints between the individual pull chain links 2 and the adjusting
-- 21 -- : -: ~ ~
--! ~ 2 1 3 7 3
chain links are designed to be so deep that the webs 42 with the
hook-shaped projections 43 of the neighboring pull chain links 2
and adjusting chain links 5 are displaceable in the grooves 40 in the
direction ~f movement of the roll shutter, i.e. transversely to the
5 longitudinal extension of the roll shutter slats.
In order to lock the adjusting chain links S, the latter are
equipped at their lower longitudinal rims with grooves 51 and at
their upper longitudinal rirns with webs 52 so that also the adjusting
chain links 5 can be locked in the manner of a tongue-and-groove
i
joint.
Figure 13 illustrates an ernbodimel1t of louver slats 1
which are attached without louvering to the pull chain links 2.
Such roll shutter slats are customarily utilized as the uppermost roll
shutter slats of a roll shutter, which last-mentioned slats are
designed sothatthey cannot be louvered. In orderto connectthe
non-louverable roll shutter slats 1 firmly and shape-rnatingly with
~the pull chain links 2, the roll shutter slats 1 have, in the zone of
their lower longitudinal rirn, a projection 53, and the pull chain
Iinks have~an associated projection 54, so that here again a guide
means is provided extending in the longitudinal direction of the roll
shutter sla~, preventing the roll shutter slat 1 from being detached or
pivoted away from the pull chain link 2.
Figure 14 illustrates a roll shutter that can be louvered as
described hereinabove.
As has been set forth above, problems with strength or
safety occur frequently in roll shutters on account of lack of
- 22 -
-- 2:L373~Q
resistance force of the roll shutter. In order to solve this problem,
it is suggested according to this invention to have the pull chain
links extend over the entire width of the roll shutter. One example
of this is shown in Figures 16 and 17, wherein the pull chain links
2 are, however, illustrated only partially in their central zone, i.e
without those zones wherein the adjusting chain links 5 are
arranged. As can be seen in Figure 16 and also in a sectional view
in Figure 14, the pull chain links 2 exhibit cutouts 55 defined by
webs 56. In this way, in spite of a very high stability of the pull
chain links 2 and therefore of the entire roll shutter, an adequate
possibility of seeingthrough the rol! shutter with louvered-open slats
is ensured.
Figure 18 shows how the roll shutter slats can be pivoted
with respect to one another with the rigidly attached and not
louverable roll shutter slats 1. In the same way, the pull chain links
2 with the pivotably moul1ted louver slats 1 and the associated
adjusting chain links 5 can also be pivoted with respect to one
another.
Figure 19 shows that the pivotable louver slats 1 are
- ~ - .
~ ~ ~ 20 locked against an opening swing-out motion by way of groove 49
; . ~,;
and tongue 50 when the pull chain links 2 have been placed in
complete juxtaposition with one another. ;~
A substantial advantage exhibited by the embodiment
described in connection with Figure 16, with pull chain links r
extending over the entire width of the roll shutter in conjunction
with profiled guide means as the connectil1g hinges resides in that ;;
,. ~, .
,,; ",
. . . . . ....... . . ... . . .
-~ . 21~73~0
a continuous connection of the pull chain links with one another
and with the louver slats 1 is provided over the entire width of the
roll shutter whicl1 can be produced in a very simple way and also
can be mounted in a very simple manner.
In order to establish the connection between the
adjusting chain links 5 and the louver slats 1, a bore 57 is provided
in the extension of the groove 41 at the lower longitudinal rim of
the adjusting chail1 links 5, this bore being partially open toward the
groove 51 and being associated with a bore 58, arranged in the
1 0 same way, in `the extension of the groove 49 at the pivotable louver
slat 1. A peg 59 is inserted in the bores 57 and 58 and optionally
pressed to fit into one of the two bores 57, 58 in order to prevent
axial displacement of the,peg 59, whereby the peg 59 forms a
connecting hinge between the adjusting chain links S and the
louver slats 1.
Figures 21-28 illustrate embodiments of the invention
constituting a further development of the invention as shown in
Figures 13-20. The most significant difference as compared with the
:
~:: above-described embodiment resides in that the pull chain links,
20 though also extending over the entire width of the roll shutter, are
no longer made of one piece but rather are composed of several
sections, namely of an upper profiled rod 60 carrying the hinge web
- : : 42 with the hook-shaped projection 43, as well as the groove 44 for
connection with the louver slat 1, of a lower profiled rod 61
carrying the profiled groove 40 for connection with the web 42 of
the neighboring, upper profiled rod 60, as well as of one or several
- 2 4 -
" ~
~ ' '~'' ~
2 1 3 7 3 ~ 0 : ~
..... ; . ,.
. . .
cen~ral webs 62 and marginal webs 63 at the two ends of the pull
chain links wherein the central webs 62 and the marginal webs 63 ; .
connect the upper 60 and the lower 61 profiled rod with each
other.
... .-. . . .
S Connection ofthe central webs 62 and marginal webs 63 ; -
with the upper 60 and lower 61 profiled rods can be accomplished
. . ~,
in a great variety of ways. Figures 23, 24 and 25 show exemplary
embodiments. In the example illustrated in Figure 23, the upper
profiled rods 60 exhibit T-shaped grooves 64 and the lower profiled ;
rods 61 have T-shaped grooves 65 which face each other. The
central webs 62 exhibit at their upper and lower longitudinal rims
correspondingly profiled, T-shaped webs which are received in the -
. - . ~
T-shaped grooves 64, 65, ~ihereby a firm connection is established
between the upper 60 and the lower 61 profiled rods. The central
webs 62 can optionally be secured against shifting, for example by
cem;enting or press-fitting.
Figure 24 shows a roll shutter slat whicl1, in principle, is
~: of the ~same structure as the roll shutter slat shown in Figure 23 as
regards the hinged connectiol1s between the individual pull chain
links 2 as well as with the louver slats 1, but in this case the central
: :
webs 62 are welded to the upper 60 and lower 61 profiled rods, as ;- ::
iilustrated at 66 and 67. : . ~ -
The embodiment showl1 in Figure 25 corresponds
essentially to that illustrated in Figure 23, but in this case the T-
shaped grooves 64 and 65 are replaced by snap conl1ections 68 and
69, similar to a T-shaped groove.
- 25 - ~- : ~ . ` `
~'- ' '`"`''`` '' `''
~ 21~73SO
In order to secure the louver slats 1 against unintentional
swinging open, an upwardly projecting web 50 is, in turn, provided
at the upper profiled rod 60 in the embodiments according to
Figures 23-25; this web forms with the web 42 an upwardly open
channel into which enter, 011 the one hand, a leg of the groove 40
of the hinged connection between the pull chain links 2 and, on the
other hand, the lower rim of the louver slats 1 in the pushed-
together condition of the roll shutter, so that the louver slats 1 are
secured against swinging open.
The marginal webs 63 exhibit essentially the same profile
as the central webs 62; they are conl1ected, just as the latter, to the
upper 60 and lower 61 profiled rods and extend from the lateral rim
of the upper 60 and lower.61 profiled rods up into the fixed guide
profiles 71 of which one is illustrated in Figures 21 and 22. Care
must be taken here to provide a sufficiently long and firm
- ; connection between the upper 60 and the lower 61 profiled rods
- and the margil1al webs 63. Optionally, the marginal webs 63, as
described above, can exhibit free spaces for the hinged connections
between the louver chain links 5.
Figure 26 shows how the adjusting chain link 5 overlaps
the extension 70 of the marginal web 63 of the pull chain link 2.
bepending on the shape of the marginal web 63 and, respectively,
of the extension 70 and the adjustil1g chail1 links 5, here again
vacant spaces can be arranged at the marginal webs 63 so that the
articulated conl1ectiol1s find room without any problems between
the adjusting chain links 5.
:
- 2 6 ~
,, ,. ., ~ `
: ` . - . :
,~ : ': ',
"2~73~0 ~
Figure 27 shows an embodiment of the inventio~
wherein the sliding chain link 3 is welded to the extension 70 of the
marginal web 63. In order to make do with a minimum of different ;
profile configurations in the roll shutter according to this invention,
5 the provision can also be made, for example, to utilize the same
profiles for the adjusting chaill links 5 and the sliding chain links 3.
The louver slats 1 in Figure 24 as well as the adjusting ~ ~:
chain links 5 in Figure 26 and the sliding chain links 3 in Figure 27
are~roll-forrned profiles. In order to be able to connect the louver
10 slats 1 ~and the adjusting chain links 5 with one another via hinge
pins 76, a shell 73 is riveted to the louver slat 1 in Figure 24, and
a: shel~l 73 is welded on in Figure 26 to accommodate the hinge pin
76. - `;s-~
Figure 28 shows a connection between the extension 70
~ , ... - ....,. ~
15~ ~ of the marginal web 63, as well as a sliding chain link 3,
correspollding essentially to the embodil-nent of Figure 23.
Figures Z9-34 show an embodimellt of the invention with
profiled connecting hinges but with pull chain links 2 that do not
extend all the way through. The roll shutter has central pull chain
20~ links Z~'~and marginal pull chain links 2" which have the same
profile shape and exhibit at their lower longitudinal rim a groove 40
and ~at their upper longitudillal rim a web 42 with a hook-like
projection 43 in order to establish the hinged connection between
the individual pull chain links 2', 2". Below the web 42 there is
25 again a groove 44 into whicll a louver slat 1 can be suspended with
a web 47 having a hook-like projection 48. The pull chain links 2"
- 27 ~
, ~ ,
. , . ... .. , . .~ .. ., .. . . .. i. . . . . ~ . . . - . . . - ...
2~1373~0
on the rim side moreover exhibit vacant spaces 10 and 11 wherein
the joints between the adjusting chain links 5 are accommodated
when the roll shutter is not louvered open.
The louver slats 1 likewise exhibit vacant spaces 74 and
5 75 at their lower longitudinal rims in those zones where the pull
chain links 2', 2" are located; the joints 40, 42 of the pull chain
links 2' and 2" are accommodated in these spaces in the closed
condition of the roll shutter.
The adjusting chain links 5 are connected with one
10 another in a manner described above by way of webs 42 at their
upper longitudil1al rims and grooves 40 at their lower longitudinal
- rims. In order to connect the adjusting chain links 5 with the louver
slats 1, the adjusting chail1- links 5 again carry bores 13 and the
louver slats 1 have bores 13' in whicl1 a pin or rivet 76 is inserted
15 and is optionally secured against displacement by press-fitting into
the bore l 3'. .
In order to secure tl1e louver slats 1 against unintentional
opening, they have, in turn, a groove 15 at their lower longitudinal
rim;; this groove can be placed over the upper longitudinal rim 14
20 of the louver slats 1 whel1 the roll shutter has been completely
lowered.
To adapt the roll shutter of Figure 29 to various groove
widths of the fixed guide grooves 71, sliding elements 33 are
provided whicl1 are fixedly joined to the pull chain links 2" on the
. ~ .
25 marginal side. For this purpose, the sliding elements 33 exhibit, as
showll in Figures 29 and 34, a hook-shaped web 78 at their upper
- 28 ~
2 ~ 3 7 3
longitudinal rim by means of whicll they can be hung into the
groove 44 at the pull chain links 2". The siiding elements 33
furthermore have a lug 79 at a certain distance from their lower
longitudinal rim; with this lug, the elements are suspended on a
5 web 80 atthe pull chain links 2".
Figures 32 and 34 show the structure of the roll shutter
slats 77 which are utilized as the uppermost roll shutter slats of a
roll shutter and consequently need not be louvered. It can be seen
that ~ the cross section of the roll shutter slats 77 corresponds
10 essentially to the total cross section of the louver slats 1 and,
respectively, the adJusting chain links 5 and the sliding elements 33
in conjunction with the pull chain links 2' and 2".
All of the parts of the disclosed ernbodiments of the roll
shutter according to this invention can be manufactured either of a
synthetic resin or of metallic materials, such as, for example,
aluminum alloys, and they can be either extruded profile moldings
or, in case of metallic materials, roll-formed profiies; it is also
possible to employ differing materials for different parts of the roll
shùtte~rs. !n this connection, the choice of materials is primarily
~ ~ . ... . ..
dependent~on the manufacturing costs and the requirements with ~ : -
regard to strength to be met by the individual components. For
example, synthetic resin moldings can be produced very favorably
from an expense viewpoint, but show disadvantages as compared 1
with profiles made from metallic materials due to lack of thermal
stability, i.e. resistance to heat, cold, UV radiation, and the like.
-- 2 9 ~
~ ., '~.,
.`'~''..`.~ ~.i'
2137350
It is furthermore pointed out that, of course, individual
components of all disclosed embodiments of the roll shutter
according to this invention can be readily exchanged one for the
other as long as the function of the individual parts remains
S preserved. For example, it is possible to utilize, in a single roll
shutter, pins accommodated in bores, for example to connect the
pull chain links 2 with the louver slats 1, as well as profiled guide
means, for exarnple to connect the adjusting chain links S; in this
connection, any other possible combination is likewise feasible.
10Figures 35-38 show devices for triggering the louver
motion. Both devices basically consist of a movable, approximately
angular part 81 which latter will be denoted hereinbelow as roll
shutter hook and is arranged at the first louver slat 1 or at the
adjusting chain link S associated therewith; and of a fixed hook-
5 shaped member 82 which latter is arranged in the zone of the upper
~ . ~
edge of the~ opening to be closed off and is designed to be resilient
" ~ ~ or is mounted resiliently; this member will be denoted as spring
- hook hereinbelow.
Tl1e roll shutter hook is designed in such a way and is
~; ~ 20 arranged in hidden fashion in the roll shutter slat so that it will flipout of the roll shutter slat either due to gravity or with the support
of a spring as soon as it has left the shutter housing. The roll shutter
hook 81 can drop, for example, toward the outside by an angle of
about 30.
25The embodiment of the spring hook 82 shown in Figures
35 and 36 consists of a hook part 83 resiliently attached to a
- 30 -
,,,~,`~,,,.""-", ~
13~3~0
bracket 88. The hook part 83 has a hook 84 at its lower end as
well as a slot 85 which extends in the direction of movement of the
roll shutter and is open toward the bottom in the region of the
hook. At its end Iying in opposition to the hook 84, the slot 85
5 terminates into a rectangular through hole 86.
On the side of the hook part 83 facing the roll shutter,
flat springs 87 are attached on both sides of the slot 85 and extend
from the hook 84 further downwardly and obliquely to the roll
shutter. The free ends 122 of the flat springs 87 are rounded to
- ~ 10 ~avoiddamageor~scratchingoftherollshutterwhenthesesprings
are in contact with the roll shutter. At their upper ends 89, the flat
springs 87 extend into the zone of the rectangular passage hole 86
and prevent the roll shutter- hook 81 from coming into engagement
with the spring hook 82 while the roll shutter is being lowered.
l5 ~ As~ described above, the roll shutter hook 81 drops
outwardly by its own weight or is urged outwardly by a spring as
soon as it has left the shutter housing, not shown.~ Subsequently,
the roll shuner hook 81, during lowering of the roll shutter, is urged
agaln into the direction toward the roll sl1utter by tl1e upper ends 89
2Q ; of the flat springs 87, then by the hook member 83, and finally by
the lower ends I 22 of the flat springs, untiI the rolI shutter hook can
again drop toward the outside below the ends 122.
If it is intended to~open the louvers of the roll shutter, it
must thereafter be pulled upwards again; during this step, the
25 approximately T-shaped roll shutter hook 81 is urged with its
transverse beam 90 over the lower ends 122 of the flat springs 87
-- 3 1
213735D
toward the outside and glides upwardly along the flat springs 87
until it has passed the hook 84. When the roll shutter is then again
lowered, the roll shutter hook 81 hangs up with its transverse beam
90 in the hook 84, and the louver slats 1 are retained and opened
5 by way of the adjusting chain when the roll shutter is lowered
further.
In case the roll shutter is again pulled completely
upwardly, the roll shutter hook 81 slides through the slot 8~
upwards; the transverse beam 90 passes through the passage hole
~1 i0 86 and slides upwards along the upper ends 89 of the flat springs
87, the latter being bent in the direction toward the roll shutter until ;
the transverse beam 90 of the roll shutter hook 81 releases these
springs and they can again spring toward the outside. `
Once the roll shutter ~has been pulled completely
15 upwards, the spring hook 82 can pivot inwardly toward the window
.
- aperture or the like, i.e. toward the left in the clockwise direction
in Figure 35, and comes into contact with the upper edge of the
~; masonry opening.
- To compensate for a lateral play of the roll shutter and
20 thus of the roll shutter hook 81, the provision can be made that the
hook part 83 is slightly displaceable laterally and thus can adapt to
the lateral position of the roll shutter hook 81.
Figures 37 and 38 show another, substantially simplified
embodiment of a spring hook 82 which merely consists of a single
25 component, punched out, for example, of spring steel. The spring
hook according to Figures 37 and 38 consists of a mounting
- 32 - ~ ~
, 2~37~5 0
element 91 and a spring member 92 separated from the mounting ~ ~:
element 91 by slots 93 and 94 defined by webs 95 and 96. The
.., ~ ....
spring member 92 consists of an upper spring portion 92' and a
lower spring portion 92" separated from each other by a transverse
5 slot 97. At its lower end, the spring portion 92" exhibits a hook
102. At its upper end, the lower spring portion 92" has a deflecting
member 98 pOilltillg upwards away from the roll shutter and
delimiting the transverse slot 97 Oll its underside, and the upper
spring portion 92' has at its lower end a guide-in member 99
10 pointing downwards away from the roll shutter and delimitingthe
transverse slot 97 on its topside and projecting past the upper rim
of the deflecting member~98. At its upper end, the spring portion
92' furthermore has an inlet guide member 100 pointing upwards
away from the rol l shutter.
l S During lowering of the roll shutter, the roll shutter hook
81, in the present example being approximately of an L-shape, first
:~ slides along the guide-in member 100 inwardly, then downwardly
along the upper spring portion 92', until it can drop slightly toward
the outside, and subsequently slides along the deflecting member 91
20 and further downwardly from the lower spring portion 92' until it
can swing toward the outside underneath the hook l 02. When the
roll shutter, to open the louvers, is again pulled upwardly, then the
roll shutter hook 81 slides along the hook 102 toward the outside
and over this hook, the lower spring portion 92" being bent in the
25 direction toward the roll shutter until it can hook into the hook 102
- 3 3 -
~ I ~ 21373SO
during the renewed lowering of the roll shutter. The roll shutter can
then be louvered open, as described above.
If the roll shutter is subsequently again pulled completely
upwards, the roll shutter hook 81 slides upwardly until it is urged
again toward the roll shutter by way of the deflecting member 98
and underneath the guide-in member 89 through the slot 97, and
thus can pass the spring hook 82. - ;~
In order to ensure adequate overlapping of the guide-in
member 99 over the deflecting member 98, a folded section 101 -
can be provided at the mounting member 91 whereby the mounting ~
member 91 is shortened. The mounting member 91 can ~ ~-
furthermore exhibit bores 103 in order to be threaded, for example,
to a fixed guide profile 71 for the roll shutter. The folded section
101 can also be used as a stop lug for abutment against the ~ I
underside of the box wherein the roll shutter is rolled up; this
substantially facilitates the measuring~work during installation.
Figure 39 shows an embodiment of a spring hook 82
substantially simplified as compared with the embodiment
~` illustrated in Figures 37 and 38. The spring hook according to
Figure 39 consists likewise of a mounting member 91 and a spring ;~
part 92, a hook 102 being arranged at the lower end of the spring ~ ~ ~
part 92. The spring hook is arranged in a roll box 123 or the like, ~;
; tliè forward free side 124 of which is angled and extends with its
lower longitudinal rim obliquely downwardly and away from the ~ ~ :
wall opening toward the outside. ;
...-,..-
- 34 - `;`~,.
....... ... . ..
2 1 3 7 3 5 0
. . .
Figure 39 furthermore indicates a fixed guide rail 71
which can be of a conventional design. The spring hook 82, in
turn, has bores 103, with the aid of whicll it can be threaded or
riveted to the shutter housing 123 or an extension of the guide rail
5 71. The spring hook 82 is arranged in the angled zone of the front
wall l 24 of the shutter housing 123 and is in contact with this wall
with its upper longitudinal rim 125, or has only a small spacing
therefrom. Thereby, the roll shutter hook 81 first glides downwardly
.. .. .
along the front wall 124 and then directly on the side of the spring
l O hook 82 facing the roll shutter without being able to engage into the
hook 102 while the roll shutter is being lowered.
When the roll shutter, after having been lowered ~ -
completely, is pul!ed up again, the roll shutter hook 81 slides with
.
its transverse beam 90 along the hook 102 toward the outside, the
~l5; springpart92witlltllehook102beingbellttowardtherollshutter
until the transverse beam 90 has passed the hook 102. When the
roll shutter is then lowered again, the roll shutter hook 81 can hook
into the hook 102, and the rol! shutter can have its louvers opened
~ However, if the roll shutter is pulled further upwardly,
20then the angled portion of the front wall 124 of the roll box 123
takes over the function of a guide-in rnember, and the roll shutter
hoQk 81, with continued upward pulling of the roll shutter, is swung
increasingly further inwards; simultaneously, the spring part 92 of
the spring hook 82 also moves resiliently toward the inside until the
25transverse beam 90 of the roll shutter hook 81 has passed the spring
_ 35 ~
.' !
. ~137350
hook 82, and the lat~er can spring back again toward the outside in
the direction toward the front wall 124.
The spring hook 82 illustrated in Figure 39, in
conjunction with the angled front wall 124 of the shutter housing
S 123, not only has the advantage that the spring hook 82 is of a ver
simple structure but also has the advantage that the spring hook 82
is entirely accommodated in the shutter housing 123, offering not
only advantages froln an optical viewpoint but also protection from
damage of the spring hook 82.
For purposes of improved illustration, Figure 39 shows
a portion of the front wall 124 broken away wherein the outer
contour of the front wall 1 24 has been indicated in dot-dash lines
- for a better representation of the structure.
It is understood that the embodiments of spring hooks
15 and roll shutter hooks shown in Figures 35-39 are not restricted to
any specific structure of a roll shutter but rather can be utilized in
any desired roll shutter.
`
Since the roll shutter hook 81 il lustrated in Figures 37-39
is of a very flat design, it is not absolutely necessary for the hook to -
20 be received in a cutout of the louver slat 1; rather, the hook can
also contact the first louver slat 1 directly on the outside.
Figures 40 and 41 show how lateral shifting of the ~ ;
individual parts with respect to one another can be prevented in a '~ ,,'J,`," `'',`"
hinged connection of individual parts by way of profiled guide
means. For this purpose, for example, a cutout 105 is provided at u
the web 42 of the pull chain link 2, and by two cuts 107, 108 a
. ...; ,
-- 3 6 -- ~ . . " . . . `. - "
` ~;', ., .`.".'. '''
:,, .' ', . ,: ~',
~ '~1373~0
tang 109 is formed at one leg 106 of the groove 40; in the
assembled condition of the hinged connection 40, 42, this tang can
be bent into the cutout 105. It is, of course, also possible to
provide a cutout at one or both legs 41 or 106 of the groove 40 and
5 to bend a tang arranged at the web 42 into one of these cutouts.
Furthermore, this way of securement can be utilized not only in
case of the pull chain links 2 with one another, but also in the
connection between the adjusting chain links 5 and the connection
between the louver slats 1 and the pull chain links 2, just as in case
10 of the sliding chain links 3, 4 or the connectiol1 between the sliding
chain links 3,4 and the pull chain links 2.
Figure 42 shows an octagonal shaft onto which a roll
shutter according to this invention is wound up; it can be seen that
the roll shutter can be rolled up without any problems by the
~ mutually aligned connecting pins 7, 19 and 25 of the pull,
adjusting, and sliding chail1 links.
In Figure 43, a shaft 111 is illustrated onto which a roll
shutter has been wound up completely. The shaft 111 exhibits an
axis of rotation 112 and is supported via bearings, not shown, in the
shutter housing which is not illustrated, either. The shaft 111 has
an approximately polygonal cross section with rounded sides and
edges, a region 113 of the polygon havil1g a smaller distance from
the axis of rotation 112 of the shaft 111 than the remaining
circumference of the polygon. A groove is provided beside this
2S region 113 wherein a pin 114 is housed. Via this pin 114, a flat
spring 115 isattachedtotheshaft111 and iswound approximately
- 37 ~
37~5~
once around the shaft 111; with its other end, the spring is
connected to the first or uppermost leaf 77.
This first leaf 77 is in contact with the shaft 111
approximately in the zone 113 where this shaft has the smallest
S outer radius. The leaf 77 is offset radially toward the inside by
about the amount of its thickness in this embodiment, so that no
bulge will ~orm when the subsequent leaves are wound up over the
leaf 77. On account of this eccentric structure and/or support of the
shaft 111, an outer roll-up circle 116 is thus created in total, having
10its center in the axis of rotation 112 of the shaft 111, the periphery
of the wound-up roll shutter lacking any bulge. The outermost
winding diameter of the roll shutter can thus be reduced by double
the extent of eccentricity of a bulge present in the prior art, with the
final result that the roll shutter becomes more compact.
l SThe shaft 1 1 1, in the embodiment shown in Figure 43,
i has inwardly projecting webs 117 extending in the longitudinal
direction of the shaft 111 whereil1 the web 117 Iying in opposition
to the inwardly offset region 113 of the shaft 111 is the longest.
The surfaces of the webs 117 facing the axis of rotation 112 are
2 0 located on a circle 118, the center of the latter Iying on the axis of
rotation 112 of the shaft 111. The webs 1 17 accommodate shaft
bearings, not shown, or a motor for driving the roll shutter, or the
like.
Figure 44 shows another embodiment of the shaft 111
25 wherein the webs 117, as compared with Figure 1, are either
shortened or entirely omitted so that a larger space is created in the
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interior of the shah 111 wherein a relatively large motor or the like
can be housed. The center 1 19 of a circle 120 which can now be
drawn in the shaft 111 lies eccentrically to the axis of rotation 112
of the shaft 111. In order to compensate for this, the motor mount
121 or the shaft journal is arranged in the axis of rotation 112. The
shaft 111 now runs again eccentrically and cornpensates for the
bulge so that once more the rolled-up form has the ideal smaller
diameter 116.
In the embodilllellts according to Figures 43 and 44, an
approximately polygonal shaft is always referred to. However, the
invention also covers, for example, shafts with a circular periphery,
which shafts are eccentrically supported.
In summation, - the invention can be described, for
example, as fol lows~
The roll shutter, whicll can be louvered, exhibits at least
one pull chain~ the chaill links 2 of which are articulated together
with onè another and with pivotable, lamellar louver slats l, and at
least one adjusting chain, tlle chain links 5 of which are articulated
together with one another~and with the louver slats l. The
ad~usting chain links 5 overlap the pull chain links 2, and preferably
the louver slats l also overlap the pull chain links 5 at least
partially. Thereby, gaps extending through the roll shutter are
avoided; the roll shutter is of a very compact structure; and the roll
shutter slats exhibit a constallt cross section all the way through.
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- 39
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