US3759189A - Anti-back-up device for work carriers on power-and-free conveyor systems - Google Patents

Anti-back-up device for work carriers on power-and-free conveyor systems Download PDF

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Publication number
US3759189A
US3759189A US00180401A US3759189DA US3759189A US 3759189 A US3759189 A US 3759189A US 00180401 A US00180401 A US 00180401A US 3759189D A US3759189D A US 3759189DA US 3759189 A US3759189 A US 3759189A
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US
United States
Prior art keywords
track
cam
work
work carrier
cams
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
US00180401A
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English (en)
Inventor
D Desilets
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STANDARD ALLIANCE IND
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STANDARD ALLIANCE IND
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Application filed by STANDARD ALLIANCE IND filed Critical STANDARD ALLIANCE IND
Application granted granted Critical
Publication of US3759189A publication Critical patent/US3759189A/en
Assigned to SECURITY PACIFIC BUSINESS CREDIT INC., 228 EAST 45TH, NEW YORK, NEW YORK, 10017, A CORP OF DELAWARE reassignment SECURITY PACIFIC BUSINESS CREDIT INC., 228 EAST 45TH, NEW YORK, NEW YORK, 10017, A CORP OF DELAWARE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ANCHOR CONVEYORS, INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B10/00—Power and free systems
    • B61B10/02—Power and free systems with suspended vehicles
    • B61B10/025—Coupling and uncoupling means between power track abd vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B10/00—Power and free systems
    • B61B10/02—Power and free systems with suspended vehicles
    • B61B10/022—Vehicles; trolleys

Definitions

  • a work carrier for a power-and-free conveyor system has anti-back-up means comprising a pair of serrated cams mounted on the carrier frame and weight-biased into one-way frictional engagement with the undersurfaces of the track channels.
  • the invention relates to power-and-free conveyor systems of the type shown in U. S. Pat. No. 3,415,201 issued Dec. I0, 1968 to A. Czarnecki.
  • the invention is particularly applicable to work carriers having front and rear trolleys constructed so as to permit closepacking or accumulation, and which pass through transfer points.
  • a pair of cams are rockably mounted on the trolley frame of a work carrier, in this case on the rear trolley of a work carrier having front and rear trolleys connected by a load bar.
  • the cams have serrated edges engageable with the lower flanges of the track channels, and are located between the load carrying wheels of the trolley, thus acting as a trolley hold-down and preventing the cam plate from tipping up in accumulation.
  • the provision oftwo antiback-up cams on each carrier compensates for the presence of auxiliary devices required on certain systems which extend below the channel flanges and might disengage one of the cams.
  • the result is an anti-,back-up device which positively prevents a work carrier from backing up in accumulation and at transfer points regardless of the speed of the conveyor of the inertia induced in the carriers.
  • the pendulum action of the workpiece is quickly dissipated due to the stabilizing effect the anti-back-up cams have on the load bar.
  • the anti-back-up cams also allow accumulation of carriers on slight vertical inclines without the use of any auxiliary equipment.
  • the location of the cams under the channels increases reliability because the only tolerance which need be taken into account is that of the lower flange thickness of the channels. Additionally, the space available under the channels allows provision of an effective anti-back-up device.
  • each work carrier comprises interconnected front and rear trolleys, the rear trolley of one carrier 11 being indicated generally at 14. This trolley is connected to the front trolley (not shown) by a load bar indicated partially at 15 below track 12.
  • Track 12 comprises a pair of spaced channels 16 and 17 in facing relation, each channel having an upper flange l8 and a lower flange 19.
  • Rear trolley 14 has a frame generally indicated at 21 extending between tracks 16 and 17.
  • the frame has two pairs of wheels 22 and 23 in spaced relation, these wheels being disposed within channels 16 and 17 and resting on lower flanges 19.
  • a pair of guiding rollers 24 and 25 are carried by frame 21 between flanges 19 for lateral stability of the trolley.
  • a cam plate 26 surrnounts frame 21 and is disposed above track 12. As described further in the aforementioned patent, this cam plate is bifurcated and otherwise so shaped as to accomplish the close-packing or nesting function of adjacent work carriers.
  • Frame 21 has a depending portion 27 below the portion 28 thereof connected to load bar 15.
  • a shaft 29 extends through frame portion 27 beneath track 12.
  • a pair of bushings 30 and 31 are mounted on this shaft and rockably support a pair of anti-back-up cams indicated generally at 32 and 33 respectively.
  • cams are of identical construction, each having an upwardly extending portion 34 with a slightly convex serrated upper edge 35, the teeth of which may be slightly crowned.
  • the curvature of edge 35 is such that its leading end 36 is closer to the axis of shaft 29 than is its trailing end 37.
  • the thickness of portion 34 is relatively small, as compared with a weighted portion 38'which extends below shaft 37. The weighted portion thus tends to hold serrated edge 35 against the undersurface 39 of flange 19.
  • the cams are held in place by washers 41, nuts 42 and cotter pins 43.
  • a stop 44 projects from each side of frame 21 and is engageable by a shoulder 45 when cam 32 or 33 swings clockwise from its FIG. 1 position. This will prevent the cam from flipping over. Should the dimension between shaft 28'and surface 39 increase due to wear or some other reason, stop 44 will engage the other end of surface 45, preventing the cam from flipping counterclockwise. It should be noted that if either cam were to flip around in either direction and cause edge 35 to recontact surface 39, conveyor flow in the direction of arrow 13 would be prevented.
  • cams 32 and 33 will be inactive during I the normal powered movement of work carrier 11 in the direction of arrow 7 13. During such movement, edges 35 will be lightly dragged along undersurfaces 39 of track channel flanges 19. However, should there be any tendency for the work carrier to move in a direction opposite that of arrow 13, the teeth of serrated edges 35 will immediately bite into undersurfaces 39 and prevent such retrogression.
  • At least one cam rockably mounted on said work carrier beneath said track said cam having an upper portion with a frictional edge engageable with the undersurface of the track, means constantly urging the frictional edge into engagement with the track, the frictional edge being so shaped as to freely permit work carrier movement in a forward direction but preventing backup movement by frictional engagement with the track, said cam having a shoulder thereon, and a stop extending from said work carrier and engageable by said shoulder to prevent said cam from flipping over in either direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chain Conveyers (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
US00180401A 1971-09-14 1971-09-14 Anti-back-up device for work carriers on power-and-free conveyor systems Expired - Lifetime US3759189A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18040171A 1971-09-14 1971-09-14

Publications (1)

Publication Number Publication Date
US3759189A true US3759189A (en) 1973-09-18

Family

ID=22660317

Family Applications (1)

Application Number Title Priority Date Filing Date
US00180401A Expired - Lifetime US3759189A (en) 1971-09-14 1971-09-14 Anti-back-up device for work carriers on power-and-free conveyor systems

Country Status (9)

Country Link
US (1) US3759189A (enExample)
JP (1) JPS5430192B2 (enExample)
BR (1) BR7206337D0 (enExample)
CA (1) CA962965A (enExample)
DE (1) DE2243315C3 (enExample)
FR (1) FR2154022A5 (enExample)
GB (1) GB1361364A (enExample)
IT (1) IT963588B (enExample)
SE (1) SE393574B (enExample)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986458A (en) * 1974-03-21 1976-10-19 Pohlig-Heckel-Bleichert Vereinigte Maschinenfabriken Aktiengesellschaft Power and free conveyor
US4075949A (en) * 1976-02-19 1978-02-28 General Mills, Inc. Cart pushing apparatus
US4326466A (en) * 1980-03-13 1982-04-27 Acco Industries Inc. Anti-back up device for conveyor trolley
US5046588A (en) * 1990-09-14 1991-09-10 Ronald Boben Cam-operated rail clamp
US5180036A (en) * 1990-09-14 1993-01-19 Boben Ronald J Cam operated rail clamping device
US5320211A (en) * 1992-06-04 1994-06-14 Tsubakimoto Chain Co. Backstop device of carrier in trolley conveyor
US5524548A (en) * 1995-02-09 1996-06-11 Fox; Richard D. Festoon brake system
US5884564A (en) * 1997-04-15 1999-03-23 Custom Conveyor & Supply Corp. Anti-backup device for power-and-free conveyor systems
WO2011037608A1 (en) * 2009-09-28 2011-03-31 Karl Imhoff Locking safety mechanism for suspended transport apparatus
US8342047B1 (en) 2008-09-17 2013-01-01 Honda Motor Co., Ltd. Ratchet style anti-back device for conveyor dollies
US11273991B2 (en) 2018-09-03 2022-03-15 Ocs Holding Ab Overhead conveyor system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5751157Y2 (enExample) * 1978-04-28 1982-11-08
JPS6023238Y2 (ja) * 1978-11-20 1985-07-10 株式会社ダイフク アンチバツク機構付きコンベヤ用トロリ−
US4464997A (en) * 1982-01-18 1984-08-14 Jervis B. Webb Company Conveyor trolley and track
DE3213779C2 (de) * 1982-04-08 1984-08-30 Louis Schierholz Kg, 2800 Bremen Schienengeführtes Laufwerk für Power-and-Free-Anlage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US648258A (en) * 1899-12-27 1900-04-24 Charles William Hill Rail-clamp.
US2326377A (en) * 1941-11-08 1943-08-10 American Car & Foundry Co Slack adjuster for railway brakes
US2623614A (en) * 1949-06-28 1952-12-30 Armstrong Cork Co Safety device for conveyers or the like
US3200768A (en) * 1963-09-04 1965-08-17 Mechanical Handling Sys Inc Conveyor system with accumulating trolley units
US3415201A (en) * 1966-01-10 1968-12-10 Standard Alliance Ind Power-and-free conveyor system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH411020A (de) * 1963-12-27 1966-04-15 Meszaros Zoltan Start- und Prüfvorrichtung in einer Seilbahnstation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US648258A (en) * 1899-12-27 1900-04-24 Charles William Hill Rail-clamp.
US2326377A (en) * 1941-11-08 1943-08-10 American Car & Foundry Co Slack adjuster for railway brakes
US2623614A (en) * 1949-06-28 1952-12-30 Armstrong Cork Co Safety device for conveyers or the like
US3200768A (en) * 1963-09-04 1965-08-17 Mechanical Handling Sys Inc Conveyor system with accumulating trolley units
US3415201A (en) * 1966-01-10 1968-12-10 Standard Alliance Ind Power-and-free conveyor system

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986458A (en) * 1974-03-21 1976-10-19 Pohlig-Heckel-Bleichert Vereinigte Maschinenfabriken Aktiengesellschaft Power and free conveyor
US4075949A (en) * 1976-02-19 1978-02-28 General Mills, Inc. Cart pushing apparatus
US4326466A (en) * 1980-03-13 1982-04-27 Acco Industries Inc. Anti-back up device for conveyor trolley
US5046588A (en) * 1990-09-14 1991-09-10 Ronald Boben Cam-operated rail clamp
US5180036A (en) * 1990-09-14 1993-01-19 Boben Ronald J Cam operated rail clamping device
US5320211A (en) * 1992-06-04 1994-06-14 Tsubakimoto Chain Co. Backstop device of carrier in trolley conveyor
US5524548A (en) * 1995-02-09 1996-06-11 Fox; Richard D. Festoon brake system
WO1997046434A1 (en) * 1995-02-09 1997-12-11 Fox Richard D Festoon brake system
US5884564A (en) * 1997-04-15 1999-03-23 Custom Conveyor & Supply Corp. Anti-backup device for power-and-free conveyor systems
US8342047B1 (en) 2008-09-17 2013-01-01 Honda Motor Co., Ltd. Ratchet style anti-back device for conveyor dollies
WO2011037608A1 (en) * 2009-09-28 2011-03-31 Karl Imhoff Locking safety mechanism for suspended transport apparatus
US20110072580A1 (en) * 2009-09-28 2011-03-31 Karl Imhoff Locking Safety Mechanism for Suspended Transport Apparatus
GB2488263A (en) * 2009-09-28 2012-08-22 Karl Imhoff Locking safety mechanism for suspended transport apparatus
US8296878B2 (en) 2009-09-28 2012-10-30 Karl Imhoff Locking safety mechanism for suspended transport apparatus
US8650675B2 (en) 2009-09-28 2014-02-18 Karl Imhoff Locking safety mechanism for suspended transport apparatus
GB2488263B (en) * 2009-09-28 2014-03-19 Karl Imhoff Locking safety mechanism for suspended transport apparatus
US11273991B2 (en) 2018-09-03 2022-03-15 Ocs Holding Ab Overhead conveyor system

Also Published As

Publication number Publication date
SE393574B (sv) 1977-05-16
GB1361364A (en) 1974-07-24
JPS5430192B2 (enExample) 1979-09-28
DE2243315B2 (de) 1977-11-03
BR7206337D0 (pt) 1974-12-31
CA962965A (en) 1975-02-18
DE2243315C3 (de) 1978-06-22
FR2154022A5 (enExample) 1973-05-04
IT963588B (it) 1974-01-21
DE2243315A1 (de) 1973-03-22
JPS4872861A (enExample) 1973-10-01

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Owner name: SECURITY PACIFIC BUSINESS CREDIT INC., 228 EAST 45

Free format text: SECURITY INTEREST;ASSIGNOR:ANCHOR CONVEYORS, INC.;REEL/FRAME:004520/0885