US3804232A - Structurally balanced plastic conveyor chain - Google Patents

Structurally balanced plastic conveyor chain Download PDF

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Publication number
US3804232A
US3804232A US00311969A US31196972A US3804232A US 3804232 A US3804232 A US 3804232A US 00311969 A US00311969 A US 00311969A US 31196972 A US31196972 A US 31196972A US 3804232 A US3804232 A US 3804232A
Authority
US
United States
Prior art keywords
link
chain
pitch line
side bars
conveyor chain
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
Application number
US00311969A
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English (en)
Inventor
E Freiwald
R Thomson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
REX-PT Inc A CORP OF
Original Assignee
Rexnord Inc
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 Rexnord Inc filed Critical Rexnord Inc
Priority to US00311969A priority Critical patent/US3804232A/en
Priority to AU62921/73A priority patent/AU485160B2/en
Priority to DE2359541A priority patent/DE2359541C3/de
Priority to NLAANVRAGE7316421,A priority patent/NL169714C/xx
Priority to CA187,224A priority patent/CA992903A/en
Priority to FR7342954A priority patent/FR2208830B1/fr
Priority to JP48135667A priority patent/JPS4987081A/ja
Priority to GB5597573A priority patent/GB1424470A/en
Priority to SE7316264A priority patent/SE404349B/xx
Priority to ZA739144A priority patent/ZA739144B/xx
Priority to BE138439A priority patent/BE808133A/xx
Priority to AR251329A priority patent/AR201929A1/es
Priority to DK651473A priority patent/DK133238C/da
Priority to ES421131A priority patent/ES421131A1/es
Priority to BR9518/73A priority patent/BR7309518D0/pt
Priority to IT32155/73A priority patent/IT1002269B/it
Application granted granted Critical
Publication of US3804232A publication Critical patent/US3804232A/en
Assigned to WADE, WILLIAM J., RODNEY SQUARE NORTH, WILMINGTON DELAWARE 19890, TRUSTEE, WILMINGTON TRUST COMPANY, RODNEY SQUARE NORTH, WILMINGTON DELAWARE 19890, A CORP. OF DE. reassignment WADE, WILLIAM J., RODNEY SQUARE NORTH, WILMINGTON DELAWARE 19890, TRUSTEE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: REXNORD INC.
Assigned to REX-PT, INC., A CORP. OF DE reassignment REX-PT, INC., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: REXNORD INC.
Assigned to WILMINGTON TRUST COMPANY, RODNEY SQUARE N., WILMINGTON, DE 19890, A DE CORP., WADE, WILLIAM J., RODNEY SQUARE N., WILMINGTON, DE 19890 reassignment WILMINGTON TRUST COMPANY, RODNEY SQUARE N., WILMINGTON, DE 19890, A DE CORP. TO AMEND THE TERMS AND CONDITIONS OF THE SECURITY AGREEMENT DATED APRIL 30, 1987. (SEE RECORD FOR DETAILS) Assignors: REX-PT, INC., A DE CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B65G17/08—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 surface being formed by the traction element
    • B65G17/086—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 surface being formed by the traction element specially adapted to follow a curved path
    • 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

  • ABSTRACT A molded plastic conveyor chain link is constructed such that the pitch line of the link is offset upwardly from the horizontal centerline of the link. The relative increase in the volume of link material below the pitch line provides more nearly equal section moduli above and below the pitch line. As a result, the resistance of the chain link to transient bending stresses induced by variations in the line of chain pull vertically from the pitch line is substantially balanced.
  • the present invention pertains to the art of flat top article carrying chains in which adjacent links having interfitting knuckles are pin connected to form a chain with a contiguous flatconveying surface.
  • Such a chain is adapted to be sprocket driven and operated upon'a pair of spaced parallel supporting strips or guideways. More particularly, this invention relates to improvements in links of suchchains molded from plastic and to means for attaining a more structurallybalanced design.
  • Molded plastic conveyor chains are well'known in the art and are used to'convey a wide variety of articles in relatively light load applications.
  • Each link of such a chain is generally of unitary construction and includes a flat, article carrying top plate, and link interconnecting means dependingfrom the underside of the top plate and provided with lateral bores for the receipt of connecting pins, all in a manner known in the art and shown, for example in U. S. Pat. No. 2,911,091.
  • the link interconnecting means includes portions on both the forward and rearward edges of the link adapted to interfit with the complimentary portion of the next adjacent link such that the bores may be aligned for receipt of a connecting pin.
  • Tensile strength and rigidity is incorporated into the link by providing interconnecting means comprising laterally spaced side bars or reinforcing ribs, which also serve as lateral guide means for thechain operating in the guideways.
  • interconnecting means comprising laterally spaced side bars or reinforcing ribs, which also serve as lateral guide means for thechain operating in the guideways.
  • the pin receiving bores of the link are located such'that the line extending longitudinally between their centers, called the pitch line, bisects the link section. Theoretically, then, chain pull occurs directly along the pitch line and there is 'no bending moment induced in the links by chain tension. Practically, however, variations in manufacturing, wear within the pin receiving bores through operation, and variations in the guideways and other conveyor structure cause the chain pull to be offset from the pitch line. As a result, a bending moment is induced and the link is subjected to a bending stress in addition to the normal tensile stress.
  • the portion of the link below the pitch line comprises only the lower portions of two spaced side bars.
  • the section modulus, in comparison to the portion of the link above the pitch line, is very low, and the comparative bending stress induced by a given bending moment will be significantly greater below the pitch line than above it. In high load applications, transient bending moments in the chain links will thus create a critical bending stress situation first in the lower link portion.
  • FIG. 1 is a front elevation of a conveyor chain link of the present invention.
  • FIG. 2 is a bottom plan view of the link shown in FIG. 1
  • FIG. 3 is a side elevation of the link shown in FIG. 1.
  • a molded plastic conveyor chain link 1 includes a flat, laterally elongated top plate 2 and a pair of integral, downwardly depending side bars 3.
  • the side bars 3' are laterallyspaced and extend rearwardly from the forward edge 4 of the link and are joined rearwardly of the trailing edge 5 by a barrel portion 6.
  • the spaced side bars 3 are provided, near their forward ends, with pin receiving bores 7.
  • the barrel portion 6 joining the rearward endsof the side bars is provided with a bore 8 which is preferably flared at its ends or elongated in the direction of chain travel, as at 9.
  • the links are assembled into a conveyor chain in a manner well known inthe art by placing the barrel portion f one link between the spaced side bars 30f another link such that the bores'7 and 8 are-aligned.
  • a connecting pin (not shown) is inserted through the bores and its ends are held within the bores 7 by an interference fit.
  • the fit of the pin in bore 8 is loose to allow articulation of the link relative to the adjacent inter'connected link and the flared ends 9 allow side flexing of the chain for travel around a curve, all in a well known manner.
  • the pitch line P of the link extends throughthe centers of the bores 7 and 8.
  • the link section below the pitch line is increased substantially.
  • the areas of the lower sections 10 below the axis A of the bores 7 are more nearly equal to the area of the upper section 11.
  • the combined section modulus of the areas 10 is correspondingly increased and made to approach that of upper area 11.
  • the construction of the present invention takes advantage of the known side bar formation wherein the outer surfaces 12 thereof are downwardly divergent to engage correspondingly divergent surfaces 13 on the aligned bores for the pins of the chain and a crosswise top plate merging with the side bars such that the upper surface of the plate is flush with the upper dimensions of the side bars, the improvement wherein the axes of said bores defining the pitch line of the chain are'offset upwardly from the longitudinal centerline of the link whereby the effective section modulus of the link above and below the pitch line is substantially equal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chain Conveyers (AREA)
US00311969A 1972-12-04 1972-12-04 Structurally balanced plastic conveyor chain Expired - Lifetime US3804232A (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
US00311969A US3804232A (en) 1972-12-04 1972-12-04 Structurally balanced plastic conveyor chain
AU62921/73A AU485160B2 (en) 1972-12-04 1973-11-27 Improved conveyor chainlink of unitary construction
DE2359541A DE2359541C3 (de) 1972-12-04 1973-11-29 Tragplatte für einen Plattenbandförderer
NLAANVRAGE7316421,A NL169714C (nl) 1972-12-04 1973-11-30 Eendelige kettingschalm van kunststof.
AR251329A AR201929A1 (es) 1972-12-04 1973-12-03 Eslabon de cadenas transportadoras
JP48135667A JPS4987081A (US06589383-20030708-C00041.png) 1972-12-04 1973-12-03
GB5597573A GB1424470A (en) 1972-12-04 1973-12-03 Conveyor chain link
SE7316264A SE404349B (sv) 1972-12-04 1973-12-03 Konstruktivt balanserad kedjelenk
ZA739144A ZA739144B (en) 1972-12-04 1973-12-03 Structurally balanced plastic conveyor chain
BE138439A BE808133A (fr) 1972-12-04 1973-12-03 Chaine transporteuse en matiere plastique
CA187,224A CA992903A (en) 1972-12-04 1973-12-03 Structurally balanced plastic conveyor chain
DK651473A DK133238C (da) 1972-12-04 1973-12-03 Kedeled til transportkeder
FR7342954A FR2208830B1 (US06589383-20030708-C00041.png) 1972-12-04 1973-12-03
ES421131A ES421131A1 (es) 1972-12-04 1973-12-04 Perfeccionamientos en eslabones de cadenas transportadoras de construccion enteriza.
BR9518/73A BR7309518D0 (pt) 1972-12-04 1973-12-04 Aperfeicoamentos em elo de corrente de construcao unitari
IT32155/73A IT1002269B (it) 1972-12-04 1973-12-27 Catena trasportatrice in plastica strutturalmente equilibrata

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00311969A US3804232A (en) 1972-12-04 1972-12-04 Structurally balanced plastic conveyor chain

Publications (1)

Publication Number Publication Date
US3804232A true US3804232A (en) 1974-04-16

Family

ID=23209277

Family Applications (1)

Application Number Title Priority Date Filing Date
US00311969A Expired - Lifetime US3804232A (en) 1972-12-04 1972-12-04 Structurally balanced plastic conveyor chain

Country Status (15)

Country Link
US (1) US3804232A (US06589383-20030708-C00041.png)
JP (1) JPS4987081A (US06589383-20030708-C00041.png)
AR (1) AR201929A1 (US06589383-20030708-C00041.png)
BE (1) BE808133A (US06589383-20030708-C00041.png)
BR (1) BR7309518D0 (US06589383-20030708-C00041.png)
CA (1) CA992903A (US06589383-20030708-C00041.png)
DE (1) DE2359541C3 (US06589383-20030708-C00041.png)
DK (1) DK133238C (US06589383-20030708-C00041.png)
ES (1) ES421131A1 (US06589383-20030708-C00041.png)
FR (1) FR2208830B1 (US06589383-20030708-C00041.png)
GB (1) GB1424470A (US06589383-20030708-C00041.png)
IT (1) IT1002269B (US06589383-20030708-C00041.png)
NL (1) NL169714C (US06589383-20030708-C00041.png)
SE (1) SE404349B (US06589383-20030708-C00041.png)
ZA (1) ZA739144B (US06589383-20030708-C00041.png)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2589451A1 (fr) * 1985-10-31 1987-05-07 Rexnord Kette Gmbh & Co Kg Convoyeur a chaine courbe
US4880107A (en) * 1987-07-31 1989-11-14 Rexnord Corporation Table top chain link with rib
US4893709A (en) * 1988-08-18 1990-01-16 Rexnord Corporation Back-flexing article carrying chain
US5176247A (en) * 1991-08-12 1993-01-05 Rexnord Corporation Sideflexing conveyor chain including low centerline hinge pin
EP0569071A1 (en) * 1992-05-07 1993-11-10 BETT SISTEMI s.r.l. Conveyor chain
US5303818A (en) * 1990-05-21 1994-04-19 Ucc Corporation Modular conveyor belt
US5330045A (en) * 1981-06-02 1994-07-19 Rexnord Corporation Low backline pressure chain
US5346060A (en) * 1993-08-31 1994-09-13 Precision Handling Devices, Inc. Link assemblies which are interconnected to provide a self-tensioning conveyor belt
US5402880A (en) * 1988-08-18 1995-04-04 Rexnord Corporation Article carrying chain having free tab
WO2000012913A1 (de) * 1998-08-31 2000-03-09 Kabelschlepp Gmbh Energieführungskette zum führen von leitungen mit räumlich beweglichen kettengliedern
US6383105B1 (en) 1999-11-24 2002-05-07 Tsubakimoto Chain Co. Guide plate for a silent chain
US6585110B2 (en) 2000-04-13 2003-07-01 Span Tech Llc Modular conveyor system with side flexing belt having roller support
US6732856B2 (en) 2001-02-27 2004-05-11 Maryland Wire Belts, Inc. Modular conveyor belt
USRE38543E1 (en) 1994-09-09 2004-07-06 Rexnord Flattop Europe B.V. Chain for a chain conveyor, and conveying system comprising such chain
US20060054469A1 (en) * 2004-08-25 2006-03-16 Dieter Guldenfels Belt module with oblong pivot hole
US20080280717A1 (en) * 2004-05-05 2008-11-13 Herbert Wehler Chain link for a power transmission chain, and power transmission chain having an expanded useful cross section
CN102410341A (zh) * 2010-09-25 2012-04-11 金雁冰 瓦销式齿型链
CN102424239A (zh) * 2011-08-12 2012-04-25 吉林大学 一种双节距变节距齿形输送链条

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR7904193A (pt) * 1978-07-03 1980-03-25 Amsted Siemag Kette Gmbh Cinta transportadora de placas com mobilidade sobre curvas
DE3541364C2 (de) * 1985-06-17 1995-11-09 Rexnord Corp Tragglied für Gliederbandförderer
DE4037354A1 (de) * 1990-11-20 1992-05-21 Mannesmann Ag Transportzahnkette
JPH1035847A (ja) * 1996-07-25 1998-02-10 Yoshino Kogyosho Co Ltd 搬送チェーン装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2911091A (en) * 1955-04-07 1959-11-03 Chain Belt Co Plastic flat top conveyer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2911091A (en) * 1955-04-07 1959-11-03 Chain Belt Co Plastic flat top conveyer

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5330045A (en) * 1981-06-02 1994-07-19 Rexnord Corporation Low backline pressure chain
FR2589451A1 (fr) * 1985-10-31 1987-05-07 Rexnord Kette Gmbh & Co Kg Convoyeur a chaine courbe
US4880107A (en) * 1987-07-31 1989-11-14 Rexnord Corporation Table top chain link with rib
US4893709A (en) * 1988-08-18 1990-01-16 Rexnord Corporation Back-flexing article carrying chain
US5402880A (en) * 1988-08-18 1995-04-04 Rexnord Corporation Article carrying chain having free tab
US5303818A (en) * 1990-05-21 1994-04-19 Ucc Corporation Modular conveyor belt
US5176247A (en) * 1991-08-12 1993-01-05 Rexnord Corporation Sideflexing conveyor chain including low centerline hinge pin
EP0527584A1 (en) * 1991-08-12 1993-02-17 Rexnord Corporation Sideflexing conveyor chain
EP0569071A1 (en) * 1992-05-07 1993-11-10 BETT SISTEMI s.r.l. Conveyor chain
US5346060A (en) * 1993-08-31 1994-09-13 Precision Handling Devices, Inc. Link assemblies which are interconnected to provide a self-tensioning conveyor belt
USRE38543E1 (en) 1994-09-09 2004-07-06 Rexnord Flattop Europe B.V. Chain for a chain conveyor, and conveying system comprising such chain
US6550232B1 (en) 1998-08-31 2003-04-22 Kabelschlepp Gmbh Energy guide chain for guiding lines comprising chain links which can move in three dimensions
WO2000012913A1 (de) * 1998-08-31 2000-03-09 Kabelschlepp Gmbh Energieführungskette zum führen von leitungen mit räumlich beweglichen kettengliedern
US6383105B1 (en) 1999-11-24 2002-05-07 Tsubakimoto Chain Co. Guide plate for a silent chain
US6585110B2 (en) 2000-04-13 2003-07-01 Span Tech Llc Modular conveyor system with side flexing belt having roller support
US6732856B2 (en) 2001-02-27 2004-05-11 Maryland Wire Belts, Inc. Modular conveyor belt
US20080280717A1 (en) * 2004-05-05 2008-11-13 Herbert Wehler Chain link for a power transmission chain, and power transmission chain having an expanded useful cross section
US20060054469A1 (en) * 2004-08-25 2006-03-16 Dieter Guldenfels Belt module with oblong pivot hole
US7080729B2 (en) 2004-08-25 2006-07-25 Habasit Ag Belt module with oblong pivot hole
CN102410341A (zh) * 2010-09-25 2012-04-11 金雁冰 瓦销式齿型链
CN102424239A (zh) * 2011-08-12 2012-04-25 吉林大学 一种双节距变节距齿形输送链条
CN102424239B (zh) * 2011-08-12 2013-04-17 吉林大学 一种双节距变节距齿形输送链条

Also Published As

Publication number Publication date
IT1002269B (it) 1976-05-20
ES421131A1 (es) 1976-04-16
AU6292173A (en) 1975-05-29
BE808133A (fr) 1974-03-29
DE2359541B2 (de) 1978-03-23
BR7309518D0 (pt) 1974-08-29
CA992903A (en) 1976-07-13
DK133238B (da) 1976-04-12
SE404349B (sv) 1978-10-02
JPS4987081A (US06589383-20030708-C00041.png) 1974-08-20
GB1424470A (en) 1976-02-11
NL169714C (nl) 1982-08-16
ZA739144B (en) 1974-11-27
FR2208830B1 (US06589383-20030708-C00041.png) 1980-01-25
DE2359541A1 (de) 1974-06-06
FR2208830A1 (US06589383-20030708-C00041.png) 1974-06-28
DE2359541C3 (de) 1978-11-23
NL7316421A (US06589383-20030708-C00041.png) 1974-06-06
DK133238C (da) 1976-09-20
NL169714B (nl) 1982-03-16
AR201929A1 (es) 1975-04-30

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STCF Information on status: patent grant

Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES)

AS Assignment

Owner name: WADE, WILLIAM J., RODNEY SQUARE NORTH, WILMINGTON

Free format text: SECURITY INTEREST;ASSIGNOR:REXNORD INC.;REEL/FRAME:004817/0047

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Owner name: WILMINGTON TRUST COMPANY, RODNEY SQUARE NORTH, WIL

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Owner name: REX-PT, INC., A CORP. OF DE, WISCONSIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:REXNORD INC.;REEL/FRAME:005005/0369

Effective date: 19880816

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Owner name: WADE, WILLIAM J., RODNEY SQUARE N., WILMINGTON, DE

Free format text: TO AMEND THE TERMS AND CONDITIONS OF THE SECURITY AGREEMENT DATED APRIL 30, 1987.;ASSIGNOR:REX-PT, INC., A DE CORP.;REEL/FRAME:004998/0232

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Owner name: WILMINGTON TRUST COMPANY, RODNEY SQUARE N., WILMIN

Free format text: TO AMEND THE TERMS AND CONDITIONS OF THE SECURITY AGREEMENT DATED APRIL 30, 1987.;ASSIGNOR:REX-PT, INC., A DE CORP.;REEL/FRAME:004998/0232

Effective date: 19880816