Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
--- S P ~ A T I ~ N.
~ 'he invention relates to a roller conve~or-belt, closed in the peri~heral direc-
tion and havinp overlappin~ belt-edges, the sald belt beln~ ada~te(l to pass through
a pluralit~ of support-roller stations, the said stations being provi~ed with a
plurality of belt-support rollers bearing uporl the external periphery Or th~ rolled
b~lt
German ~S 36 20 906 disclose~ a roLled belt exhibitinp~ the characteristics of tle
preamble to the main claim. 1n addition to -this, only a common belt-support roller
is provided between the conveying ~return strands of the conveyor. lt is known that
rolled-belt conveyors do not alway,s maintain tt~e geometry necessary for an optimal
arrangement o~ th~ belt-support ro:Llers. In the case of all known ar~rangernents of
this kind, the ed~e of the external overlappin~ edRe Or the belt enga~es the edge
of a bel-t-su~Fort roller, as a result of which the belt i~ heavily damaged and is
rendered prernaturely unserviceable. Even if cables are incorporated into the outer
parts of ~he belt, i.e. the edge-areas, these are also attac.ked and finally wear
through.
A wide varlety Or aids are used to improve the guidance of the rolled belt, in
or to reduce or pr~vent wandering. For example guide- and control-ro~ls are used
or belt-support rollers are set at an angle (~ee German OS 31 ~5 g991 for example)~
However~ all of these deviceg have the disadvanta~e of increasing c08tS and the
additional friction introduced leads to premature wear as well as increasing the
power required to drive the conveyor.
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It is therefore the purpose of the invention to
provide a rolled belt which is closed in a peripheral
direction with overlapping belt edges such that it can move
freely, in the peripheral direction, along the path of the
conveyor, without touching any of the edges of the belt-
suppoxt rollers, within the rollers, so that it may at all
times assume its optimal position, depending upon the
loading condition and external factors such as sun, rain,
or the like, with any opening of the belt along the path of
the conveyor being prevented.
According to the invention, this purpose is
; accomplished in that the belt-support rollers are arranged
at the periphery of the rolled belt in such a manner that
they overlap without touching each other. In particular,
each belt~support roller is overlapped at one end by the
next belt-support roller following in the peripheral
direction in such a manner that an axial projection of the
running surface of each belt-support roller intersects the
running surface of the next belt-support roller as seen in
the peripheral direction. Additionallyj the direction of
overlap of the belt-support rollers corresponds to the
direction of overlap of the belt edges. This ensures that
the overlapping edges, i.eO the radially outward edge of the
rolled belt, when rotated peripherally, do not engage the
edges of the following belt-support rollers. This prevents
damage to the edges of the belt, thus increasing the life
thereof. If the belt is rotated, the outer edge runs
directly on the running surface of the following belt-
support roller (wedge-action).
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The object of the invention may be used either
with stationary belt-support rollers or with support-roller
garlands, although different numbers of rollers are
required, to wit an odd number (5,7,9) in the case of
stationary rollers and an even number (preferably 6) in the
case of garlands.
The arrangement o~ belt-support rollers is such
that each roller is overlapped at one end by the following
roller, all of the rollers being arranged clockwise or
anticlockwise, for example, depending upon the overlap of
the edges of the conveyor-belt. In any case, the rollers
and the belt must overlap in the same direction. The
inclination of each following belt-support roller causes
the rolled belt to move further in the peripheral direction,
without offering any resistance to the relevant belt-edge.
Reverse rotation of the rolled belt also presents no
problems, since there is no Pngagement of the overlapping
edyes of the belt with the rollers.
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76
lhe design and arrangement, according to the invention, of the belt-support
roller~ enables the rolled belt to move freely in the ~,erlpherai. direction WittlOUt
the useorconstrictive forces. Depending upon circumstances,thebelt cansèek it~,o~n
opti.rnal position, with no danger Or inadvertent opening of the belt along the path
of the conveyor and with no engagement between the edges of the belt and the outer
edge of a roller with destructive consequences.
'~he invent,ion is described hereinarter in conjunction with the drawing attached
hereto, wherein;
Fi~s, 1 to 3 are di.agral(lmatical repre3entations o~ various
embodime,nts Or the rolled belt according to
the invention.
Yig, 1 illustrates a rolled belt-conveyor held in a support-roller station, showr
only in part, by upper and lower roller-~arlands 1 and 2, each of which consists of
three belt-support rollers 3,~,5 and 6,7,~, runni.ng surfaces 9 of which bear against
outer periphery 10 of tl~e rolled belt. Iocated in the vici.ni.t~ of roller ~, which is
arranged substantiall,y horizontally, is ove,rlap-area 11 where edges 12,13 o.~ the belt
lie one u~on the other.
~ elt-support rollers 3 - 8 are connected together at single hinge,-poi.nts ll,
arranged in such a manner that tne said rollers overlap each other. ThiS overl.ap
is obtaine,d by difrerent distances a,b an~ it ~revent~ edge 13 of the belt, for
example, from en~aginR with sd~e 15 of the following roller 5. In t,his case the
number oi' belt-su~port rollers is even~
Fi~. 2 ghow~ a rolled belt-conveyor Or similar desi.gn to that ~n l~l.g, 1 and
hav~n~, ove,rlappin~ belt-edKes 12~13. In thi~ case~ however, only .ri.ve 5tationar,v
rollers 16,17,1~,,19,20 ar~ provi.ded and overlap area 11 is agai.n in tile viclnit,y
of a roller 16 runninF approx,i~tely horiz,ontally. 'rhis overlapping Or roll~,rs
16-20 a~ai.n prevents edge 13 Or thH belt from engaRinR edge 21 of following roller
17, If the, bf~,lt is rotated clockwise, ed&e 13 Or the belt runs di.rectly upon
running sur.race 22 of roller 17 and i~ thus protected from damage.
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Fig. ~ show9 a rolled belt ~laving 8iX belt-3upport rollers which are arranged
in such a manner as to form an approximately V-shaped support at the top and bottom
of the beJt whereas lateral roller~ 2~27 are arran~ed substantiall,y vertically.
Here again, rollsrs 23-2~ overlap so that edge 13 of the belt cannot co~e up against
ed~e 29 of following roller 23. In thi3 example, overiap area 11 is at about 30 to
the vertical and bears a~ainst roller 2~.
