Note: Descriptions are shown in the official language in which they were submitted.
"T~ead Element fo~ ~oving Pavement or Escalato~
_. .
The inven~ion relate3 to a ~read element ~or a moving
pavemen~ or escalator, ~he ~re~d element having a t~e~d
plate to r~ceive th~ person to be tran~ported, the tread
plate havlng ~ecured co it a no~ing near at le~6t one o~
its longitudinal edges,
Tread element6 can o~ cour~e have extecnal no~ing6 and
moulding6 or the like; unfo~tunately. ~ecuring them by
means of a few sccew6 to the tread ele~nt i6 in~dequace
in the long term for the ~ou~h operati.ng condit~on~ to
whlch they are Qub;e~t, and brea~age~ of nosing6 o~ the
jamming of. no6es betweon relativel~ movirlg part~ ef a
moving pav~ment or ~n e~calator cau~e unwanted
disturbances in operation.
I~ i6 known to use so-c~ d compact step ele~ents
i.e., unit~Ly dle cast s~ep el~mant~ mada o an
aluminium alloy. These are 6t~0nger and lighter than
com~o~ite step elements but have the di~dvantage of
requiring replacement of the entire ~tep elemant in th~
2n event of damaye to the ribbing on the ou~ide edge~ of
the tread ~urface, a relatively elaborate and expensive
op~ration.
3~
IC is the object o~ the invention tO p~ovide a tre~d
elem2nt which i9 free ~om these di.sadvantages an~ which
enables the no~ing oc the ll~e to be secu~ed ov~r the
en~ire lsn~th o ~t lea~t one of its longitudin~l ed~
5 Accordinq to the invention, therafo~e, th~ nostng
engage~ below a pa-t of ~he tread pla~e ~long at leas~
one o~ its two longitudinaL qdges and i6 ~igid~y secured
to t~e tread ~late batween lts ~wo lon~udinal edge~ by
~dditional securing means.
1t~ Con~eniently, for an ev~n ~trorlger connectiorl between
the no~ing and the tread slement. the tr~ad plate has
the noEing on at lea3t one of its outside edg~s and each
no~ing engages along both i~3 lon;~itudinal edges below
~rt of the trQad plate.
Advantageously in this case, the no~in~ ~ngages, alony
its lon~i~udinal edge di~ected ~owacd~ the inte~or of
the ~ead pla~e, in at least ona rece~s the~ein.
C:onvenien~ly, the nosing engages, alon~ its Iongi~udinal
edge extending alony ~he tread plate outside sur~ace,
below the out~ide oE tho ~read plate.
~L%3~
It i~ advdntageou~. more par~cula~ly on ~h~ fLont
longit~dinal edge of a ~ead el~ment, if the no3ing
engagea at an angle a~ound the longit-ldin~l edge o the
tread plate and engage~ along each of i~s ~wo
longitlldin~l edges in a ~3C~S6 in the teead elemen~.
Conveniently, to en~ure that mo~e pa~ticula~ly nosings
or the like secured laterally and at ~he rear to the
Cread plate do no~ drop of~ in the ovent o~ accidental
release of their additional securing means whilo the
1n element is in use, the lateral gap betwe~n, on the one
han~. the no~ing an~, on the othe~ hand, a com~onent
i.mmediately ad~acent the same, di~posed at the same
hei~h~ aa oc D~vjectin~ beyond the noslng and movable
~elatively to t~e t~ead plate which has th~ noain~ 18
le~a than ~he ~obility of the nosin~ pe~pendicula~ly to
its length in the operative zone o~ the two zone~ wheLe
the nosing engages below the tr~a~ plate.
Conveniently too, for an optimal connection between the
no3ing or tho like and the ~read elem~nt, the
zn interengaging ~art6 of the nosing and tredd plate orm
two longitudinal guide~ which extend along the ~wo
lorlgitudinal edgea of the nosi.ng and which permit
longitudinal movement ~he~eof telatively to the tread
plate but not movement tran~verRely of nosing length.
~23~
Advantageously, to en6ure that ln the event o~ the
additional ~ecuring means being lost a no6ing ~r the
like dispose~ l~terally on the tread ~lat~ cannot
accldentally drop of, ~he ~osing ex~ending along the
tread element ~ront wall ex~end~ ovsr -theentire wid~h o~
the tread ~late and thereEore pLevents the two lateral
~o~ing~ from projecting out ln ~hair guide~ beyond the
~ront wa-l.
Conveniently. a~ lea~t one o~ the two lateral nosings
1~ extends to the tread element front wall and has ~n
abutment which co-o~e~ates with the tread ~late and
whi~h permit~ introduction o~ the nosi.ng ~rom ~he t~e~d
plate side op~osite the front wall i.nto its associaled
longitudinal gulde but prevent~ movement of the nOai.n9
in ~uch guide boyond tha front wall.
Claim~a lO t~ 17 set out othe~ advantageous ~urther
develo~men~s o~ the tread ~lement a~ording ~o the
invention ~
The Invention also ~late~ to a tread elament ~ a
moving pavement or e~calator, the tread element having a
tr~ad plate to receive the peL~on ~o ~e ~ransported, the
tread ele~ent having a ~arning ~trip extending alonq an
out~ide Oe the tread pl~te, çharacterised in that the
warnin~ ~trip i~ a di~erently colour~d nosin4 which i~
~3~
_ 5 _ 26197-2
inserted in the -tread plate, is at a distance from the outside
thereof, forms part of the tread plate tread surface and is rigidly
attached to the tread plate by additional securing means.
In accordance with the present invention there is
provided a uni-tary die cast tread element for a moving pavement or
escalator, the tread element having a tread plate to receive the
person to be transported, the tread plate having secured to its top
surface a nosing along at least one of its longitudinal edges, in
which -the nosing engages below a part or embraces the outside edge
of the tread plate along at least -the outside one of the two longit-
udinal edges of the nosing and is rigidly secured to the top sur-
face of the tread plate between the two longitudinal edges of the
nosing by additional securing means.
Claims 19 to 23 set out convenient further developments
of this subject of the invention.
The inven-tion will be described further below, by way of
example, with reference to the accompanying drawings, wherein:
Figure 1 is a perspective view of a part of an escalator
having tread elements in accordance with the invention;
Figure 2 is a sec-tion on the line II-II of Figure l;
Figure 3 is a sec-tion on the line III-III of Figure l;
Figure ~ is a section IV-IV of Figure l;
Figure 5 is a plan view of a part of -the tread pla-te of
-the escalator step shown in Figure l;
Figure 6 is a section on -the line VI-VI of Figure 5;
~fi~
Figu~ 7 iB a pe~spectiv~ view o a part o~ a ~econd
exemplary embodiment o an eecalator ~dving tread
al~ments ~n ~ccordance with the lnvention~
E`icJure 9 i~ a section on ~he line VIII-~III o~ ~igure 7;
Figure 9 is a ~ection on the line IX--IX of Fi~3ura 7;
Figu~e 10 i3 a section on the l~ne X-X o E'igure 7:
~'igur3 11 iB a ~ection on the l~ne XI-XI o~ Pigure 7;
Fi~ure 12 i~ a section on the line XII-XlI of Figure 7;
~'igure 13 1~ a sec~ion on the line XIII-XlI~ o~ ~ligure
1(~ 7, and
F'igure 14 i~ a view in ~ec~lon of another exemplary
em~odiment ~or ~ecllring a noBing o~ ed~e strip or th~
like,
As can be gathered ~rom Figure 1, a tread element or
e~calator 6tap 1 o~ ~e escalator ~hown has a tread
plate Z adapted to re~eive the pet30n to be
tran~po~ted~ The tread plate 2 ha~ no6ing~ or edge
6trips or the like 3.4.5 lntrodu~d into it and ~ecured
~o it.
~L~3g~
As can be gathered rrom Figure~ 2 and 4 . the relatively
heavily expo6~d no~in~s 3,5 engage along bo~h th~ir
longitudinal edges 3a, 3b and 5a. 5b ov~r their entire
length in each case below a re~pective pa~t 6-9 o~ t~e
step 1 and aLe thu~ secuLed along theiL two out~ide
edge6 3~,3b and 5a,5b over their enti~e length to the
8tep 1. ~180, 6crew6 10 are provided whlch rigidly
6ecure the no~in~6 3.5 to the t~ead ~late 2 b~twoen
their ~wo longi~udinal edge~ 3d, 3b and ~,5b
1(] reseectively re~aine~ b~ the tread plate ~.
As Figure Z shows, the ~ront nasi.nt~R 3 ~n~a~e at an
angle arou~d the ront longitudinal edge o~ the tread
plat~ 2 - i.e., of the ~tep 1 - and en~age along both
~h~ir longi~ldinal ed~es 3a,3b in a rece~s with which
15 the ~tep 1 is ~o~med below a pro,oction 6.7
re~pectiv~ly. Also, the two longitudi.nal e~ges 3a,3b o~
~he angulaL cros~-6e~tion no~ingB 3 projec~ at least
~3ubstantially perpentlicularly to the tread plate ~ and
the ~ront wall 11 and ~nga~e in a coL~e~ponding groove
ZO in ~he ~tep 1. The no~ing 3 i~ theref ore prevon~et~ ~rom
moving in the direction A or B per~endicula~ to itB
coLre~pondingl~ dovised longitudinal edge 3a and 3b and
paLallel to the tread ~late 2 and front wa~1 11
~ esp~t lvely.
a
Th~ noRinq 3 ha~ on it~ o~tside rib6 L4 of the ~ame
pitch a6 the rib~ of the ~read plate 2 and ~ront wall 11.
~s can be gathe~ed f rom Figure ~. the lateral no~ings or
edging6 or the like 5 engage, along their lonqitl1dinal
edge 5a directed towards the intaLior o~ the t~ead plate
2, in a recess with whlch the t~ead plate 2 i~ formed
b~low a projection 8 and are thus secured over the whole
leng~h o~ the edge 5a ~o the ~tep 1.
Along their longi~udinal odge 5~ which extcnds ~long the
outside edge 9 of the tread ~late 2, th~ no~in~s 5
extend below the out~ide o the tread plat~ 2 and ara
therafore s~cured along the entire length of thei
second lonqitud~nal edge 5b to ~e 6tep 1.
Those p~rt~ of ~he no~ing S whi~h engage below th~
lr~ projection 8 and the outsid~ ~dge 9 are of a leng-th ~uch
tha~ their engagem~nt l~ngth a and b re~pectively i~
gr~ater than th~ 1it~ral gap~ s b~twe~n the no~ing 5 and
the ~ixedly di~po~ed ~ide curtainlng 20 ~ee al~o Figure
1), so that even ~hould the addition~1 securi.n~ elements
10 d~op out, th~ no6ing 5 would not dro~) out a6 well.
A6 can be gathered from ~igure 3, the rear no~iny or
edging 4 engages. along its lon~itudinal ~dgo 4b
sxtendlng along the out~lde edge lS of the eread ~late
-
~2~3`9ti3~3
2. below the out6ide the~eo~ and i~ therefor~ ~ecuLed
over the whole length of ~he edge 4b to the tread plate
2.
Along lt~ second longitudinal edge 4a the re~r no~ing or
edging or the lika 4 i~ rlgidly 6ecured tO ~he t~ead
olate 2 by th~ ~crew~ 10.
Also, the longitudin~l odge 4a of the no~ing 4 p~ojects
~ubstanti~lly perpendicularly to the tread plate 2 and
engages below the tread plata. The r~3ulting catch rib
16 engage~ in a correspondin~ clined groove 17 in the
3tep 1 50 that ths no~ng 4 i~ prevented from a movem~nt
C p~rp~ndicular to itC correspondingly de~lsed
lon~itudinal edge 4a and parallel to the tread plate Z
or In any othcr di~ection ~xtending in such plan ove~
its whole length; con~equently, the nosing 4 can be
;ntroduced into it~ two lateral longitudinal guide~ onl~
lengthwi~e of it~elf~
~'o reduce the C08t 0~ no~ing production and to reduce to
a mihimum the e~ect of pitch error~ of tha ~ibs on the
~[] no~ings and to reduco ~e~y con~idsrably the effoct o
expan~ion errors, the nosings ar~, convsni.ently, and a~
shown in Figuro S, aub-divided o~er thei~ length into a
number o~ se~menta 3',3'' and 3'''. the various ~egm~nt6
3~,3l~,3~' being formed for lateral ccntering, in the
~g~
manne~ visibl~ in Figure 6, with a rece~s 18 whioh i~ in
their under~ide and in which a c~ntering projection 19
o~ tha step 1 angages eenteringly. Of course this kind
of cente~ing is po66ible only in the casa o~ such
nosings or the like as do not have to be lnt~odu~ed
lengthwi6e in lateral guid~s.
Sin~e this kind of a~cho~a~e of the no~ings 3,4,5 to the
s~ep 1 cau~e for a relatlvely complicated ~nchoraga zone
th~rein, this con~tructlon i~ particul~rly sui~ahle ~or
compact tread elements ~roduced as a~ alumi.nium alloy
die ca6tin~, where anchorag~ ~acilitie6 o~ this ~ind can
be pro~ided relatlvely simply.
0~ ~our~e, securing ele~ent6 other than Che screw6 19
can be us~d, such aa plastics anchorage pins which are
formed on the no6inqs cr the lika and wh;ch, af~er th~3ir
~ntroduction into corre~Dondingly pre shaped bore~ in
the tt~ad element, are deformed ~t the end projecting
~rom the bore by h~at and, there~ole. anchored~
l~he tread ~late ~ can of course have in it6 exte~nal
~0 zone~ coloured marki~qs to indicate to t,he 2er~on on the
e~cala~oL that he should lt at all po66ible ~cep ~way
from thase outer zones o~ the tread plate.
I)nortunat~1Y~ thess coloured markings have the
~Z3~
11
di3advantago that the~ ver~ quickly cea~a to be striking
becau6e ~he colou~ coaring ~ears.
To obviata ~hi~ and to enable ~he tread pl~te outer
zone~ to be p~oduced as a unltary die casting with the
remainder of the tread elemerlt, the wa~nirlg s~rip takes
~he ~orm~ as can b~ gatheLed more partiGularly ~ro~
Pigure 7, of edgo 6trip6 3' g',5' in3erted i.n ~he tread
p].ate 2 and dlspoGed at a dis~ance ~rom lts o~tside
wall. The latter nosings ~orm a p~rt o~ the t~ead plate
tread ~u~face and hava ~he s~me width pi~ch ~ ~he
latter and ampli~y it6 r~b~ continuou~ly to ~orm cib~
extencling over the entire tre~d ~ur~ace. The no6ing~
3~ ,4~ ,s~ u~3ed ~or thi~ pu~eose can be made, for examE)le,
o~ yellow plastics or of a yellow anodiz~d aluminium
alloy; in t:he lat~er e~ent th~ no3ings can be prQduced,
for example, by drawirlg o~ continuous ca6ting.
The edging~ 3',4',$' are secured, as can be gathered
from Pigu~es 8 to 13, by each eng~ging along one
longituhinal edcJo 3b,4b,~b ~e~pecti~ely below a
'~0 pro~cting part of the tread plate 2, ~o a~ to be
6~ factorily secured thereto over th~i~ whole length.
To en~ura that ~he no~in~s 3',4',5' cannot shift
Late~ally, orepo~ite longitudinal edges 3a,4a,5a engage
e~ch with an abutment 21 formed in th~ tread plate 2.
l'he foot o~ th~ no~ings or edglng~ o~ the like thu~
1~
~n~agi.ng in a ~ec~s~ in ~he pl~te 2 1~ so de~i6ed that
t~e variou~ nosing~ can be remo~ed from the ~r~ad
e1ement if they are first ~ilted around their
longit1~dinal edge 3b,4b,Sb dispo3ed bolow the respective
~o3ec~ion 23 ~ the ~read pla~e Z.
Aeter the nosin~6 3',4',$' have been introduced into the
tread pldte 2, the no~ings are rigidly ~ecured thereto
by mean~ o~ additional ~ecuring means 1.0, such as 6crew6.
To en6ure that in the ev~nt o~ any screwG 10 dropping
1~J out the no~ing~ 3',4',5' cannot drop out, ~he la~ter are
interlac~d by means o~ averlapp~ng projec~ion~ Z4.
~lowever. to ~rlable ~ny of the ~our nosing~ to be
introduced or removed, ~he no~ing 4' i~, a~ ~hown in
~igure 13, movable lengthwi~e by an amount d g~eater
r~ than the overlap e of lt6 projectlon 24 over ~he
con~.kJuou6 no~ing 5'.
~o removing the nosing6 thu~ cecured g~om the pla~e ~,
all th~ 6crew~ 10 are ~ir~t ramoved. wherea~ter the re~r
no~in~ 4' i~ disengaged again~t ~,he fo~ce of a
comurer~r~ion ~p~ing 22 ~rom the noaing 5' it ove~aps,
whelea~te~ ~he no~ing 5, then the ~ront no~ing 3', then
the two ~ide no~ings 5' and ~inally the reaL nv~in~3 4'
c~n be remoYed ~rom the ~read plate 2. Al~o, the
- 13
nosings 3'.4',5' Cdll b~ sQcured by their ov~rlapping
a~rangement without this addltional ~ecuring.
FiguLe 14 shows, the nosing can be ~ntroduced in a
recess in the t~ead plate 2. such rece~s cente~ing the
nosing ~t leas~ laterally ~nd pre~e~ably n~rrowing
downwa~dly.
