US3439795A - Flat wire conveyor belt having slotted bar links - Google Patents

Flat wire conveyor belt having slotted bar links Download PDF

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Publication number
US3439795A
US3439795A US687205A US3439795DA US3439795A US 3439795 A US3439795 A US 3439795A US 687205 A US687205 A US 687205A US 3439795D A US3439795D A US 3439795DA US 3439795 A US3439795 A US 3439795A
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United States
Prior art keywords
tractive
belt
links
bar
members
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
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US687205A
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English (en)
Inventor
Gerald C Roinestad
John F Rodman Jr
John S Burnett
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Ashworth Bros Inc
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Ashworth Bros Inc
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    • 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
    • B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
    • B65G17/06—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms
    • B65G17/063—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms the load carrying surface being formed by profiles, rods, bars, rollers or the like attached to more than one traction element
    • B65G17/064—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms the load carrying surface being formed by profiles, rods, bars, rollers or the like attached to more than one traction element the profiles, rods, bars, rollers or the like being interconnected by a mesh or grid-like structure
    • 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
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/02—Articles

Definitions

  • a flat wire conveyor belt comprising; a plurality of slotted tractive links, a plurality of tractive cross pins for interconnecting the tractive links, and a plurality of slotted bar links positioned adjacent the edges of the belt and connected thereto by the cross pins for carrying most of the tractive load of the belt as it travels around lateral curves.
  • This invention relates to a flat wire conveyor belt having means for obviating fatigue failure of the tractive links of the belt resulting from the repeated elastic deformation of the tractive links which occurs when the belt travels around lateral curves. More specifically, the invention concerns a flat wire conveyor belt having a plurality of slotted bar links positioned along the edges of the belt adjacent the tractive links thereof, which bar links carry substantially the entire tractive load of the belt as it travels around lateral curves to thus substantially eliminate elastic deformation and resultant fatigue failure of the tractive links.
  • each link is connected by transversely extending connecting members which form with the tractive members a plurality of wedge-shaped segments.
  • the segments defined by each link may be nestably received within the segments defined by the longitudinally adjacent links, permitting the belt to collapse longitudinally.
  • the belt When the belt travels around a lateral curve, it collapses longitudinally in a graduated manner across its Width.
  • the segments nearer the inner concave edge of the belt are nestably received further within the longitudinally adjacent segments than are the segments positioned progressively closer to the outer convex edge of the belt.
  • the entire tractive load of the belt is carried by a relatively few of the tractive members which are positioned nearest the outer edge thereof.
  • the present invention offers an improved solution to the problem of fatigue failure of the tractive links of a flat wire conveyor belt by providing means other than the tractive links or carrying the tractive load of the belt when the belt travels around lateral curves.
  • Such means comprise a plurality of slotted bar links which are positioned adjacent the tractive links along the edges of the belt and which are connected to the belt by the cross pins which interconnect the tractive links.
  • a preferred embodiment of the invention comprises: a plurality of transversely disposed tractive links of flat wire each integrally including a plurality of laterally spaced substantially longitudinaly disposed tractive members and a plurality of transversely disposed connecting members each connecting adjacent ones of said tractive members, adjacent ones of said connecting members extending between opposite ends of said tractive members so that the tractive and connecting members of each tractive link form a plurality of alternating oppositely opening Wedge-shaped segments, each of said tractive members having a pair of longitudinally spaced first openings extending laterally therethrough, at least one of said first openings in each tractive member forming a longitudinally extending first slot; a plurality of pivotal tractive cross pins extending through said first openings to interconnect the tractive links, said cross pins being slidable along said first slots to permit longitudinal collapsing of the belt transversely thereof during travel of the belt around lateral curves with the wedge-shaped segments formed by one tractive link being nestably received within the segments formed by the
  • tractive links of a flat wire conveyor belt constructed in this manner will experience virtually no elastic deformation and resultant fatigue failure incident to travel of the belt around lateral curves.
  • FIG, 1 is a plan view of a preferred embodiment of the flat wire conveyor belt of the invention showing the relationship of the structural elements of the belt when it travels along a substantially straight path, with portions of the belt being shown in section;
  • FIG. 2 is an elev-ational view of the conveyor belt shown in FIG. 1, with portions of the belt being shown in section;
  • FIG. 3 is a plan view of the conveyor belt shown in FIG. 1 showing the relationship of the structural elements of the belt when it travels around a lateral curve, with portions of the belt being shown in section;
  • FIG. 4 is an enlarged perspective view of one of the bar links and a portion of one of the tractive links of the conveyor belt shown in FIG. 1.
  • conveyor belt comprises a plurality of transversely disposed tractive links 12, a plurality of pivotal tractive cross pins 14 which interconnect the tractive links, and a plurality of substantially longitudinally disposed bar links 16 positioned adjacent tractive links 12 along each edge of belt 10 and connected to the belt by cross pins 14.
  • Tractive links 12 are fabricated from continuous strips of flat wire and are formed to provide a plurality of integral tractive wire members 18 which extend substantially longitudinally of belt 10. Adjacent ones of the tractive members are connected by integral connecting members 20 which extend substantially transversely of the belt. As shown in FIGS. 1 and 3, adjacent ones of the connecting members extend between opposite ends of the tractive members and the tractive members are slightly laterally inclined so that the tractive and connecting members of each tractive link 12 form a plurality of alternating oppositely opening wedge-shaped segments 22.
  • Each tractive member 18 has a pair of longitudinally spaced, longitudinally extending slots 24 extending laterally therethrough.
  • Cross pins 14 extend through slots 24 to interconnect tractive links 12 and are slidable there- -along to permit belt 10 to collapse longitudinally, with the wedge-shaped segments 22 defined by one tractive link being nestably received within the segments defined by the longitudinally adjacent tractive links, as shown in FIG. 3.
  • the longitudinally spaced openings in the tractive members may comprise a single longitudinally extending slot and a circular hole, as shown in the aforementioned Bechtel patent, instead of the two longitudinally extending slots 24 employed in the preferred embodiment of the conveyor belt of the invention illustrated in the drawings. In either instance, the belt is permitted to collapse longitudinally incident to the sliding of cross pins 14 along the slots.
  • belt 10 When belt 10 travels around a lateral curve, as shown in FIG. 3, it collapses longitudinally in a graduated manner across the width thereof with the segments 22 nearer the inner concave edge of the belt being nestably received further within the longitudinally adjacent segments than the segments progressively closer to the outer edge of the belt.
  • cross pins 14 slide away from the outer ends of slots 24 and the inner surfaces of the adjacent connecting members 20 which are nearest the inner edge of the belt so that the tractive members 18 nearest the inner edge of the belt carry substantially none of the tractive load, Consequently, in the absence of bar links 16, the tractive members nearest the outer edge of the belt would carry substantially the entire tractive load.
  • tractive members 18 and connecting members 20 nearest the outer edge of the belt will be subjected to bending forces which cause tractive links 12 to elastically deform or flex, particularly at the junctures between the tractive and connecting members. Repeated elastic deformation of the tractive links induces fatigue failure at the aforementioned junctures, necessitating frequent replacement of the links.
  • bar links 16 which, similarly to tractive links 12, preferably are fabricated from flat wire. As shown in the drawings, the bar links are substantially longitudinally disposed and are positioned adjacent tractive links 12 along each edge of belt 10. Bar links 16 each have a pair of longitudinally spaced, longitudinally extending slots 26 extending laterally therethrough through which cross pins 14 extend for connecting the bar links to the belt. The cross pins are transversely restrained by appropriate means, such as by enlarged head portions 27.
  • the longitudinally spaced openings in the bar links may comprise a single longitudinally extending slot and a circular hole, similar to the aforementioned alternative openings which may be employed in the tractive members.
  • the slots in the bar links similarly to the slots in the tractive members permit the belt to collapse longitudinally.
  • the bar links will carry a tractive load when the cross pins engage the bearing surfaces formed by the outer ends of the openings therein. In the preferred embodiment of the invention, this occurs when cross pins 14 engage the bearing surfaces formed by the outer ends of slots 26.
  • each bar link is correlated with the longitudinal spacing between the aforementioned bearing surfaces of each tractive member so that when the belt travels along a substantially straight path most of the tractive load of the belt will be carried by the tractive members and when the belt travels around a lateral curve a substantial portion of the tractive load will be carried by the bar links disposed along the outer convex edge of the belt.
  • the spacing between the bearing surfaces of each bar link should be at least as great, and preferably be greater than the spacing between the bearing surfaces of each tractive member. As shown in FIG. 4, in the preferred embodiment of the invention the longitudinal spacing between the bearing surfaces of each bar link is greater than the longitudinal spacing between the hearing surfaces of each tractive member by a distance x.
  • This longitudinal spacing differential need not be great and preferably is only a few thousandths of an inch.
  • each bar link By spacing the bearing surfaces of each bar link a greater distance apart than the bearing surfaces of each tractive member so that the bar links carry substantially none of the tractive load of the belt when it travels along a straight path, the bar links do not continuously subject the ends of cross pins 14 to concentrated bending forces and the cross pins are less likely to fail.
  • the longitudinal spacing differential between therespective bearing surfaces, distance x should not be too great or the bearing surfaces formed by the outer ends of slots 26 in the bar links will not be engaged by cross pins 14 when the belt travels around lateral curves.
  • a plurality of bar links 16 are positioned adjacent tractive links 12 along each edge of belt 10.
  • the bar links may be positioned along only one edge of the belt if, for example, the path of the belt is such that only one edge thereof is primarily disposed on the outside of the lateral curves negotiated by the belt.
  • the bar links are arranged in longitudinally extending rows with each of the slots 26 in each bar link longitudinally overlapping one of the slots 26 in one of the longitudinally adjacent bar links.
  • the preferred embodiment of the invention shown in the drawings has two such rows positioned along each edge of the belt to provide a structure which is suitable for most conveyor belt installations.
  • a flat wire conveyor belt comprising:
  • a plurality of transversely disposed tractive links of flat wire each integrally including a plurality of laterally spaced substantially longitudinally disposed tractive members and a. plurality of transversely disposed connecting members each connecting adjacent ones of said tractive members, adjacent ones of said connecting members extending between opposite ends of said tractive members so that the tractive and connecting members of each tractive link form a plurality of altrenating oppositely opening nestable segments, each of said tractive members having a pair of longitudinally spaced first openings extending laterally therethrough, at least one of said first openings in each tractive member forming a longitudinally extending first slot;
  • each of said bar links being positioned adjacent the tractive links and arranged in at least one longitudinally extending row along each edge of the belt, each of said bar links having a pair of longitudinally spaced second openings extending laterally therethrough, said cross pins extending through said second openings to connect the bar links to the belt, at least one of said second openings in each bar link forming a longitudinally extending second slot to permit said longitudinal collapsing of the belt, the outer ends of said first and second openings forming first and second bearing surfaces, respectively, for engaging the cross pins, the longitudinal spacing between said first bearing surfaces of each tractive member being correlated with the longitudinal spacing between said second bearing surfaces of each bar link so that the tratcive members carry a substantial tractive load when the belt travels along a substantially straight path but the bar links disposed along the outer convex edge of the belt carry a substantial tractive load when the belt travels around lateral curves, thereby minimizing flexure and resultant fatigue failure
  • each of said first and second openings forms a longitudinally extending slot.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Belt Conveyors (AREA)
  • Structure Of Belt Conveyors (AREA)
US687205A 1967-12-01 1967-12-01 Flat wire conveyor belt having slotted bar links Expired - Lifetime US3439795A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US68720567A 1967-12-01 1967-12-01

Publications (1)

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US3439795A true US3439795A (en) 1969-04-22

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US687205A Expired - Lifetime US3439795A (en) 1967-12-01 1967-12-01 Flat wire conveyor belt having slotted bar links

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US (1) US3439795A (xx)
BE (1) BE724665A (xx)
DE (1) DE1810835B2 (xx)
FR (1) FR1598228A (xx)
GB (1) GB1180378A (xx)
SE (1) SE344045B (xx)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4845381U (xx) * 1971-09-30 1973-06-13
US3941316A (en) * 1973-10-23 1976-03-02 Pierce Edgar M Apparatus for comminuting and extracting
DE2808052A1 (de) * 1977-02-25 1978-11-16 Ashworth Bros Inc Foerdersystem und foerderband zum durchlaufen von kurven mit engen radien
EP0032797A2 (en) * 1980-01-15 1981-07-29 U.M.E.C.-Boydell (Belting) Limited Conveyor belt of the honeycomb type
US4878362A (en) * 1988-06-27 1989-11-07 Liquid Carbonic Corporation Chiller with expanding spiral conveyor belt
US4923067A (en) * 1988-11-10 1990-05-08 The Boeing Company Automated drill sorting system and method
US4933074A (en) * 1988-11-10 1990-06-12 The Boeing Company Article singulating system and method
US4932925A (en) * 1988-03-21 1990-06-12 Ashworth Bros., Inc. Link having a work-hardened area
US4940133A (en) * 1987-08-10 1990-07-10 Ashworth Bros., Inc. Conveyor belt and system with a non-collapsing inside edge
US4940128A (en) * 1988-11-10 1990-07-10 The Boeing Company Article orientation system and method
US4951807A (en) * 1987-08-10 1990-08-28 Ashworth Bros., Inc. Non-collapsing inside edge conveyor belt with dual pitch links
US5033071A (en) * 1989-02-24 1991-07-16 The Boeing Company Material composition analyzer and method
WO1992005096A1 (en) * 1990-09-25 1992-04-02 Liquid Carbonic Corporation Belt overlay apparatus
US5139150A (en) * 1988-11-10 1992-08-18 The Boeing Company Article sorting apparatus and method
US5141102A (en) * 1987-08-10 1992-08-25 Ashworth Bros., Inc. Conveyor belt and system with a non-collapsing inside edge
US5271491A (en) * 1993-02-18 1993-12-21 Guy Irwin Bi-directional short radius turn conveyor belt
US20070080048A1 (en) * 2005-09-30 2007-04-12 Cambridge International Inc. Variable spaced conveyor belt
US20070272522A1 (en) * 2006-05-24 2007-11-29 Kuo Yee T Conveyor belt driver chain
USD739110S1 (en) 2014-06-09 2015-09-15 Cambridge International Inc. Mesh panel

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5742886Y2 (xx) * 1978-10-25 1982-09-21
DE69510423T2 (de) * 1994-04-15 2000-02-24 Jorgen Draebel Förderkette mit einer tragfläche aufgebaut aus kettengliedern quer zur längsrichtung dieser förderkette

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2872023A (en) * 1955-09-30 1959-02-03 Ashworth Bros Inc Flat wire conveyor belt
US3261451A (en) * 1964-06-29 1966-07-19 Ashworth Bros Inc Flat wire conveyor belt having tapered pin slots

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2872023A (en) * 1955-09-30 1959-02-03 Ashworth Bros Inc Flat wire conveyor belt
US3261451A (en) * 1964-06-29 1966-07-19 Ashworth Bros Inc Flat wire conveyor belt having tapered pin slots

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4845381U (xx) * 1971-09-30 1973-06-13
US3941316A (en) * 1973-10-23 1976-03-02 Pierce Edgar M Apparatus for comminuting and extracting
DE2808052A1 (de) * 1977-02-25 1978-11-16 Ashworth Bros Inc Foerdersystem und foerderband zum durchlaufen von kurven mit engen radien
EP0032797A2 (en) * 1980-01-15 1981-07-29 U.M.E.C.-Boydell (Belting) Limited Conveyor belt of the honeycomb type
EP0032797A3 (en) * 1980-01-15 1981-08-12 U.M.E.C.-Boydell (Belting) Limited Conveyor belt of the honeycomb type
US5141102A (en) * 1987-08-10 1992-08-25 Ashworth Bros., Inc. Conveyor belt and system with a non-collapsing inside edge
US4951807A (en) * 1987-08-10 1990-08-28 Ashworth Bros., Inc. Non-collapsing inside edge conveyor belt with dual pitch links
US4940133A (en) * 1987-08-10 1990-07-10 Ashworth Bros., Inc. Conveyor belt and system with a non-collapsing inside edge
US4932925A (en) * 1988-03-21 1990-06-12 Ashworth Bros., Inc. Link having a work-hardened area
US4878362A (en) * 1988-06-27 1989-11-07 Liquid Carbonic Corporation Chiller with expanding spiral conveyor belt
US4940128A (en) * 1988-11-10 1990-07-10 The Boeing Company Article orientation system and method
US4933074A (en) * 1988-11-10 1990-06-12 The Boeing Company Article singulating system and method
US5139150A (en) * 1988-11-10 1992-08-18 The Boeing Company Article sorting apparatus and method
US4923067A (en) * 1988-11-10 1990-05-08 The Boeing Company Automated drill sorting system and method
US5033071A (en) * 1989-02-24 1991-07-16 The Boeing Company Material composition analyzer and method
WO1992005096A1 (en) * 1990-09-25 1992-04-02 Liquid Carbonic Corporation Belt overlay apparatus
US5141099A (en) * 1990-09-25 1992-08-25 Liquid Carbonic Corporation Belt overlay apparatus
US5271491A (en) * 1993-02-18 1993-12-21 Guy Irwin Bi-directional short radius turn conveyor belt
US20070080048A1 (en) * 2005-09-30 2007-04-12 Cambridge International Inc. Variable spaced conveyor belt
US7494005B2 (en) 2005-09-30 2009-02-24 Cambridge International, Inc. Variable spaced conveyor belt
US20070272522A1 (en) * 2006-05-24 2007-11-29 Kuo Yee T Conveyor belt driver chain
USD739110S1 (en) 2014-06-09 2015-09-15 Cambridge International Inc. Mesh panel

Also Published As

Publication number Publication date
DE1810835A1 (de) 1969-07-03
FR1598228A (xx) 1970-07-06
GB1180378A (en) 1970-02-04
SE344045B (xx) 1972-03-27
BE724665A (xx) 1969-05-02
DE1810835B2 (de) 1975-02-13

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