US3804232A - Structurally balanced plastic conveyor chain - Google Patents
Structurally balanced plastic conveyor chain Download PDFInfo
- 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
Links
Images
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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chain Conveyers (AREA)
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 (US07655688-20100202-C00086.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 (US07655688-20100202-C00086.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)
Cited By (18)
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2911091A (en) * | 1955-04-07 | 1959-11-03 | Chain Belt Co | Plastic flat top conveyer |
-
1972
- 1972-12-04 US US00311969A patent/US3804232A/en not_active Expired - Lifetime
-
1973
- 1973-11-29 DE DE2359541A patent/DE2359541C3/de not_active Expired
- 1973-11-30 NL NLAANVRAGE7316421,A patent/NL169714C/xx not_active IP Right Cessation
- 1973-12-03 DK DK651473A patent/DK133238C/da not_active IP Right Cessation
- 1973-12-03 JP JP48135667A patent/JPS4987081A/ja active Pending
- 1973-12-03 ZA ZA739144A patent/ZA739144B/xx unknown
- 1973-12-03 BE BE138439A patent/BE808133A/xx not_active IP Right Cessation
- 1973-12-03 GB GB5597573A patent/GB1424470A/en not_active Expired
- 1973-12-03 SE SE7316264A patent/SE404349B/xx unknown
- 1973-12-03 AR AR251329A patent/AR201929A1/es active
- 1973-12-03 FR FR7342954A patent/FR2208830B1/fr not_active Expired
- 1973-12-03 CA CA187,224A patent/CA992903A/en not_active Expired
- 1973-12-04 ES ES421131A patent/ES421131A1/es not_active Expired
- 1973-12-04 BR BR9518/73A patent/BR7309518D0/pt unknown
- 1973-12-27 IT IT32155/73A patent/IT1002269B/it active
Patent Citations (1)
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)
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 (US07655688-20100202-C00086.png) | 1974-08-20 |
GB1424470A (en) | 1976-02-11 |
NL169714C (nl) | 1982-08-16 |
ZA739144B (en) | 1974-11-27 |
FR2208830B1 (US07655688-20100202-C00086.png) | 1980-01-25 |
DE2359541A1 (de) | 1974-06-06 |
FR2208830A1 (US07655688-20100202-C00086.png) | 1974-06-28 |
DE2359541C3 (de) | 1978-11-23 |
NL7316421A (US07655688-20100202-C00086.png) | 1974-06-06 |
DK133238C (da) | 1976-09-20 |
NL169714B (nl) | 1982-03-16 |
AR201929A1 (es) | 1975-04-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
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 Effective date: 19870430 Owner name: WILMINGTON TRUST COMPANY, RODNEY SQUARE NORTH, WIL Free format text: SECURITY INTEREST;ASSIGNOR:REXNORD INC.;REEL/FRAME:004817/0047 Effective date: 19870430 |
|
AS | Assignment |
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 |
|
AS | Assignment |
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 Effective date: 19880816 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 |