Railways – Traction – Chain
Patent
1974-11-29
1977-06-21
Paperner, L. J.
Railways
Traction
Chain
198680, B61B 1300
Patent
active
040304230
ABSTRACT:
A material handling system for conveying or accumulating parts between work stations. The system permits accumulation in all portions of a closed loop, including upwardly or downwardly extending legs. The system comprises a series of trolleys supported for free movement alongside a powered endless member, each trolley having a retarding dog and a driven dog. In the downwardly extending legs, the retarding dogs normally rest against driving dogs on the constantly moving endless member, and are thus transported at a controlled rate. If trolleys are obstructed on these legs and are to be accumulated, the driving dogs will slip past the retarding dogs, which are resiliently mounted. If no accumulation is needed on an upward leg, a fixed cam immediately before this leg moves the driven dog of each trolley into position to be engaged by a driving dog. If accumulation is desired on an upward leg, a fixed member alongside the leg will hold the retarding dog in position to be engaged by a driving dog so that the trolley may be driven upwardly until it reaches a fixed retaining pawl which will keep it from dropping back. Retaining pawls may be provided for individual or stacks of trolleys, depending on weight. Components are disclosed for either upwardly cascading or downwardly cascading accumulation. Release of accumulated trolleys on an upward leg is by swinging the driven dogs into position to be engaged by driving dogs.
REFERENCES:
patent: 3044416 (1962-07-01), Reibel et al.
patent: 3230897 (1966-01-01), Orwin
patent: 3285195 (1966-11-01), Babson
patent: 3391652 (1968-07-01), Lauber
patent: 3664267 (1972-05-01), Di Rosa
patent: 3726233 (1973-04-01), Swartz
patent: 3793965 (1974-02-01), Winters
patent: 3830165 (1974-08-01), Turner
patent: 3874304 (1975-04-01), Robert
Paperner L. J.
Slattery James M.
Standard Conveyor Company
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