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WO2003068639A1 - Cylindre non commande d'entrainement de courroie transporteuse et installations le comprenant - Google Patents

Cylindre non commande d'entrainement de courroie transporteuse et installations le comprenant Download PDF

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Publication number
WO2003068639A1
WO2003068639A1 PCT/IB2003/000444 IB0300444W WO03068639A1 WO 2003068639 A1 WO2003068639 A1 WO 2003068639A1 IB 0300444 W IB0300444 W IB 0300444W WO 03068639 A1 WO03068639 A1 WO 03068639A1
Authority
WO
WIPO (PCT)
Prior art keywords
idler roller
conveyor belt
assembly
drag
roller
Prior art date
Application number
PCT/IB2003/000444
Other languages
English (en)
Inventor
Douglas John Cumberlege
Original Assignee
Douglas John Cumberlege
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Douglas John Cumberlege filed Critical Douglas John Cumberlege
Priority to AU2003245717A priority Critical patent/AU2003245717A1/en
Publication of WO2003068639A1 publication Critical patent/WO2003068639A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors 
    • B65G39/02—Adaptations of individual rollers and supports therefor
    • B65G39/07—Other adaptations of sleeves
    • B65G39/071—Other adaptations of sleeves for aligning belts or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors 
    • B65G39/10—Arrangements of rollers
    • B65G39/12—Arrangements of rollers mounted on framework
    • B65G39/16—Arrangements of rollers mounted on framework for aligning belts or chains

Definitions

  • This invention relates to a conveyor belt training idler roller assembly of the type that is adapted to slew about a pivot axis generally transverse to the plane of the conveyor belt in order to steer the belt back towards a central position on the idler roller when the belt tends to drift laterally to one or other side of the intended conveyor path.
  • the invention also relates to conveyor belt installations including such a training idler roller.
  • the invention is concerned with a conveyor belt training idler roller that can be used effectively in conveyor belt installations in which the belt moves rather slowly such as are typical in the food industry.
  • conveyor belts in general require some form of steering facility for returning a conveyor belt to a central position on its support rollers whenever it tends to drift laterally to one or other side of the desired path of movement during operation.
  • Various solutions have been proposed and implemented.
  • the other general category of training rollers is that of freely rotatable training idler rollers wherein the lateral movement of the belt itself is arranged to achieve the steering effect and it is to this category that the present invention belongs.
  • a training idler roller is pivotally mounted centrally of the length of the roller (in other words centrally across the width of the conveyor) and internally on a support shaft so as to be capable of slewing within limits around an axis transverse, and in particular, at right angles to, the conveyor belt that is being supported.
  • the outer surface of the roller is crowned so that its outer diameter decreases from the centre of the roller towards each end and drag created by engagement of the belt with the roller surface tends to slew the idler roller about the pivot axis when the belt drifts laterally towards one or other end of the roller.
  • These slow-moving conveyor belts may, for example, move at speeds of from 1 mm to 500 mm (about 0.04 to about 20 inches) per second, and are often composed of mono film belting, extruded plastic sheet or even textile or webbing materials that may be as thin as 1 mm (about 0.04 inches) or even less in some instances, have not been successfully tracked, as far as applicant is aware, utilizing training idler rollers of this general type.
  • a training idler roller assembly comprising an operatively generally horizontal freely rotatable idler roller having an outer surface for contacting and supporting a generally flat conveyor belt in use, the idler roller being rotatably supported by a support assembly that enables the roller to slew about an axis that is operatively transverse to a conveyor belt supported by the idler roller, and a drag affording element associated with each end of the idler roller such that lateral drift of a conveyor belt supported by the assembly, in use, imposes a slewing force on the assembly to tend to correct such lateral drift and return the conveyor belt to a central desired path, the idler roller assembly being characterized in that at least a part of the operative surface of the drag affording elements is, in each case, in line with an operative part of the outer surface of the idler roller and positioned immediately adjacent an end of the idler roller; in that the length of the idler roller is less than the width of a conveyor belt to be supported thereby;
  • the drag affording element in each case, to be either a non-rotatable element, conveniently a disc, providing a skid surface adjacent and in line with the operative support surface of the roller so that a conveyor belt supported by the assembly will remain substantially flat, in particular towards its edges, or, alternatively, for the drag affording element to be a rotatable element that has an optionally adjustable braking mechanism inhibiting its freedom to rotate so as to provide controlled drag that is imposed on the assembly to slew the roller about said axis; and for the diameter of the outer surface of the idler roller to be constant along the entire length of the roller (other than in the region of any central low friction band when said band is defined by a groove as is discussed hereinafter) or, alternatively, for the end regions of the outer surface of the idler roller to be tapered, preferably with an angle of taper of about one to about three degrees, so as to enhance the steering effect of the present invention with the well-known expedient of the prior art.
  • the idler roller may, as indicated above, have a central band of relatively low friction as set out more fully in my copending patent application of even date and filed under an identical title and claiming convention priority from the same basic application as this application, namely, so that in provisional patent application number 2002/1133 filed on 11 February 2002 and an identical title to the present application.
  • the content of my said copending patent application is incorporated herein by reference.
  • Such a low friction band may be a recessed band so that there is no contact between the belt and band in that area in use thereby creating a zero friction situation, or alternatively, the surface of the band is defined by a material different from the material defining the balance of the outer surface of the roller, typically a low friction material such as polytetrafluoroethylene (PTFE), high-density polyethylene, a silicon based low friction material or other low friction material.
  • PTFE polytetrafluoroethylene
  • high-density polyethylene high-density polyethylene
  • silicon based low friction material silicon based low friction material
  • the support assembly may comprise a pivot arrangement positioned generally centrally of the length of a tubular roller and internally thereof such that the pivot axis may be operatively transverse to a conveyor belt in contact with the outer surface of the roller.
  • a conveyor belt installation comprising a series of support rollers supporting a conveyor belt in conventional endless manner with at least one training idler roller assembly as defined above operatively supporting a zone of the conveyor belt, the installation being characterised in that the conveyor belt is generally flat in the transverse direction; the width of the belt is greater than the length of the idler roller; and the drag affording elements are such that, at least when the conveyor belt follows its desired path, both edges of the belt contact their associated drag affording element on a continuous basis.
  • a further feature of this aspect of the invention provides for the training idler roller to be installed in the return pass of the conveyor belt between two non- training idler rollers with the angle of contact (wrap) between the conveyor belt and training idler roller being from 15 to 180 degrees, preferably from about 40 to about 150 degrees.
  • Figure 1 is a schematic plan view illustrating the general mode of operation of a training idler roller according to the invention
  • Figure 2 is a schematic side elevation of a portion of the length of one form of conveyor belt installation including a training idler roller according to the invention and illustrating the angle of wrap;
  • Figure 3 is a sectional elevation of one embodiment of idler roller assembly according to the invention.
  • Figure 4 is an end view of one variation of idler roller assembly of the type illustrated in Figure 3;
  • Figure 5 is an end view of an alternative variation of idler roller assembly of the type illustrated in Figure 3;
  • Figure 6 is a sectional elevation similar to Figure 3 but showing a number of variations that may be made within the scope of the invention.
  • the training idler roller assembly according to the invention is most effectively, but not necessarily, introduced into a conveyor belt installation in the return pass (2) of a conveyor belt (3).
  • the idler roller is installed between two freely rotatable conventional idler rollers (4) supporting the return pass of the conveyor belt below the level of the two coplanar horizontal rollers (4) so that an increased angle of wrap around the training idler roller is achieved.
  • the exact angle of wrap required will vary from one application to the next and according to the nature of the belt and the nature of the surface of the rollers themselves and will generally have to be established empirically at the present state of development of the invention for each particular application.
  • the angle of wrap is indicated by the letter "A" in Figure 2. Clearly, this angle can be easily changed simply by adjusting the spacing between the two conventional rollers (4) or adjusting the vertical position of the training idler roller (1).
  • the training idler roller assembly is mounted so that it is freely rotatable, within restricted limits, about a generally vertical axis that is indicated by numeral (5) so that it can rotate about this axis when subjected to unequal forces (drag) on each side of the centre of the conveyor in order to direct the conveyor belt back to a central position.
  • the exact direction in which the axis (5) extends relative to the conveyor belt will usually be at right angles to the belt, but certain steering effect can be achieved by inclining the axis somewhat forwards or rearwards relative to the direction of travel of the belt.
  • the general functioning of such a training idler roller is set out in the earlier patents referred to above as well as earlier US patent No 1 ,833,180 and the disclosure of those patents is incorporated herein by reference.
  • the training idler roller assembly (4) comprises a tubular idler roller (6) freely rotatable about its own axis.
  • the idler roller is mounted by means of a pair of laterally spaced bearings (7) carried on an inner sleeve (8) through which a support shaft (9) passes with appreciable clearance that is indicated by numeral (10).
  • the inner sleeve is carried by a pivot and journal arrangement indicated by numeral (11) so that the roller and sleeve can slew about the axis (5) in order to achieve the steering effect referred to above.
  • the axis of the pivot will be generally transverse and, in particular, generally at right angles to the belt where it passes over the roller. It should be pointed out that this axis could be at an incline to the belt but in that case the belt itself is restricted to movement in only one direction, that is, the direction towards which the pivot is inclined.
  • the outer surface of the roller is defined by that of an elastomeric layer (12) bonded onto a tubular base and the surface of which is of constant outer diameter for the entire length of the roller.
  • the idler roller may have a central band of relatively low coefficient of friction, either in the form of a groove (13) that simply remains out of contact with the belt and therefore exhibits no friction with the belt (9) (as shown in the lower half of Figure 3), or it may assume the form of a somewhat broader band (14) of material that exhibits a lower coefficient of friction than the outer regions (as shown in the upper half of Figure 3).
  • a drag affording element in this case in the form of a skid disc (15).
  • the outer diameter of the skid discs is substantially the same as the outer diameter of the idler roller itself and the outer surface (16) of the skid disc forms substantially a continuation of the outer surface of the idler roller.
  • the skid discs are mounted non-rotatably on the inner sleeve (8) so that, when the conveyor belt moves in contact with the idler roller, the latter rotates whilst the skid discs remain stationary.
  • the length of the idler roller is somewhat less than the width of the conveyor belt so that the edges (17) of the conveyor belt ride continuously on the periphery of the skid discs.
  • the extent to which the edge of the belt overlaps the skid discs is preferably about 50% of the width of the disc so that whenever the belt drifts laterally with respect to the idler roller assembly it will contact the greater portion of the width of one disc and a lesser portion of the width of the other disc thereby increasing the drag on one side and decreasing the drag on the other side. This then provides a substantially equal and opposite turning force to the two sides of the training idler assembly that tends to react more rapidly to cause the conveyor belt to return to the central position when the drag on the two skid discs is substantially equal.
  • the skid disc may be a complete disc thereby extending around the entire periphery of the end of the roller or, alternatively, as illustrated in Figure 5, and indicated by numeral (15a), it may extend only around a part of the end of the roller. Still further, the skid disc could be rotatable itself provided that there is adequate resistance to rotation so as to create a drag by cooperation with the belt to impart a steering force to the idler roller assembly. Any suitable mechanism could be used for this purpose and the mechanism could be adjustable such as that described in prior US patent 2,570, 364 to which reference is made above and the disclosure of which is incorporated herein by reference for this purpose. Numerous other modifications may be made to the embodiment of the invention described above without departing from the scope hereof.
  • Figure 6 illustrates a few possible variations.
  • the outer surface of the idler roller itself could be provided with slightly tapering surfaces towards each end thereof in order to further enhance the steering effect that the conveyor has on the idler roller assembly.
  • tapered regions that are indicated by numeral (18) could extend for approximately one-third of the length of the roller and the central region (19) could be of right circular cylindrical shape.
  • skid discs (20) are shown in this case is being mounted directly onto the shaft (21) instead of the inner sleeve (22) which, in this case, is rather short and not spaced from the inner surface of the roller itself.
  • any sort of bearing assembly could be used and there is illustrated in Figure 6 a self aligning bearing (23) with auxiliary lateral supports (24).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Belt Conveyors (AREA)

Abstract

L'invention concerne un cylindre non commandé d'entraînement (4) comprenant un cylindre non commandé à rotation libre fonctionnant généralement horizontalement (6) doté d'une surface externe afin de venir en contact avec et de soutenir une courroie transporteuse généralement plate (2). Ce cylindre non commandé est soutenu par rotation au moyen d'un dispositif de support (7, 8, 11) qui permet au cylindre de pivoter autour d'un axe (5) qui est opérationnellement transversal à une courroie transporteuse soutenue par le cylindre non commandé. Un élément de résistance (15) généralement en forme d'un disque de freinage est associé à chaque extrémité du cylindre non commandé de manière à être en contact continu avec la courroie transporteuse au moins lorsqu'il suit un trajet voulu. Le mouvement latéral de la courroie transporteuse maintenu par le dispositif, lorsqu'il est utilisé, est corrigé par une force de rotation sur le dispositif imprimée par une résistance inégale sur les deux éléments de résistance. Le mouvement latéral entraîne l'augmentation de la résistance sur un élément alors que la résistance sur l'autre élément diminue, ce qui améliore l'action correctrice appliquée sur l'ensemble cylindre non commandé.
PCT/IB2003/000444 2002-02-11 2003-02-11 Cylindre non commande d'entrainement de courroie transporteuse et installations le comprenant WO2003068639A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003245717A AU2003245717A1 (en) 2002-02-11 2003-02-11 Conveyor belt training idler roller assembly and installations inclduing same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2002/1133 2002-02-11
ZA200201133 2002-02-11

Publications (1)

Publication Number Publication Date
WO2003068639A1 true WO2003068639A1 (fr) 2003-08-21

Family

ID=27735416

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/IB2003/000443 WO2003068638A1 (fr) 2002-02-11 2003-02-11 Rouleau inferieur d'entrainement d'une courroie transporteuse et installations comportant ce rouleau
PCT/IB2003/000444 WO2003068639A1 (fr) 2002-02-11 2003-02-11 Cylindre non commande d'entrainement de courroie transporteuse et installations le comprenant

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/IB2003/000443 WO2003068638A1 (fr) 2002-02-11 2003-02-11 Rouleau inferieur d'entrainement d'une courroie transporteuse et installations comportant ce rouleau

Country Status (2)

Country Link
AU (2) AU2003245717A1 (fr)
WO (2) WO2003068638A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2483179A4 (fr) * 2009-09-28 2014-03-19 Dematic Corp Transporteur à entraînement à courroie avec prise d'énergie
WO2014194344A1 (fr) * 2013-06-03 2014-12-11 Berndorf Band Gmbh Courroie sans fin pourvue de rouleaux d'appui

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005024692A1 (de) * 2005-05-30 2006-12-07 Kaindl Flooring Gmbh Vorrichtung zur Herstellung eines Zwischenprodukts oder des Endprodukts der Fertigung von Platten auf Holzbasis
CN201746030U (zh) * 2010-06-07 2011-02-16 苏州亿帝电子科技有限公司 自校偏传送装置
DE102012107413B4 (de) * 2012-08-13 2017-09-14 Maschinenbau Krumscheid Gmbh Korrekturrolle
DE102021108695B4 (de) * 2021-04-08 2022-10-27 Scrapetec Gmbh Vorrichtung mit Führungseinheit zur Führung eines Fördergurtes
CN115158976A (zh) * 2022-08-05 2022-10-11 北京雨润华科技开发有限公司 一种带式输送机胶带自动纠偏装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570364A (en) 1948-11-01 1951-10-09 Jeffrey Mfg Co Self-aligning belt idler
US2655252A (en) * 1952-07-10 1953-10-13 Samuel J Spurgeon Self-aligning idler for conveyers and the like
US2795147A (en) * 1952-10-21 1957-06-11 American Mach & Foundry Self-centering roller
US5911304A (en) 1994-09-20 1999-06-15 Alucais Inc. Conveyor tracking idler
US6173830B1 (en) 1996-06-10 2001-01-16 Tru-Trac Roller (Proprietary) Ltd. Tracking assembly adapted to be mounted to a support frame of a conveyor belt installation in order to keep the conveyor belt centrally aligned

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1051155A (fr) *
US2330923A (en) 1941-05-15 1943-10-05 Robins Conveying Belt Co Training device for conveyer belts

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570364A (en) 1948-11-01 1951-10-09 Jeffrey Mfg Co Self-aligning belt idler
US2655252A (en) * 1952-07-10 1953-10-13 Samuel J Spurgeon Self-aligning idler for conveyers and the like
US2795147A (en) * 1952-10-21 1957-06-11 American Mach & Foundry Self-centering roller
US5911304A (en) 1994-09-20 1999-06-15 Alucais Inc. Conveyor tracking idler
US6173830B1 (en) 1996-06-10 2001-01-16 Tru-Trac Roller (Proprietary) Ltd. Tracking assembly adapted to be mounted to a support frame of a conveyor belt installation in order to keep the conveyor belt centrally aligned

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2483179A4 (fr) * 2009-09-28 2014-03-19 Dematic Corp Transporteur à entraînement à courroie avec prise d'énergie
WO2014194344A1 (fr) * 2013-06-03 2014-12-11 Berndorf Band Gmbh Courroie sans fin pourvue de rouleaux d'appui

Also Published As

Publication number Publication date
WO2003068638A1 (fr) 2003-08-21
AU2003245717A1 (en) 2003-09-04
AU2003205967A1 (en) 2003-09-04

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