Modular work indexing machine and method of constructing such a

Details Modular work indexing machine and method of constructing such a Modular work indexing machine and method of constructing such a

1987-09-28

1989-11-21

Spar, Robert J.

Conveyors: power-driven

With means to facilitate working, treating, or inspecting...

Means engaging conveyor or load on a conveyor to align load...

198816, 198851, 1988602, B65G 2120

Patent

active

048816337

ABSTRACT:
A precision indexing conveyor for moving workpieces incrementally along a longitudinal pathway from work station to work station, has a pair of in-line sprockets provided at opposite ends of a frame. An endless conveyor, comprising longitudinally spaced apart workpiece carriers mounting on a series of prestretched equal length, flexible, spirally wound cable links having precisely longitudinally spaced apart, rigid pins fixed to their ends at locations such as to provide a common cable length at a time when the cables are all under a predetermined common tensile load, is trained around the sprockets. A drive drives the conveyor in increments of revolution punctuated by periods of dwell sufficient for a work operation to be performed at the work stations and the mechanism maintains a predetermined tensile load on the conveyor substantially equal to the load applied to the cables when the pins are fixed thereto. The workpiece carriers are disclosed as including platens and work support plates which are joined to the platens in a manner to provide a longitudinal float to permit shot pins to seek a precise location.

REFERENCES:
patent: 1756136 (1930-04-01), Ryther
patent: 3379298 (1968-04-01), Willis
patent: 3643792 (1972-02-01), Resener
patent: 3934701 (1976-01-01), Mooney et al.
patent: 3967721 (1976-07-01), Rhoden
patent: 4096943 (1978-06-01), Gentsch
patent: 4301915 (1981-11-01), Michalik et al.
patent: 4706796 (1987-11-01), Chambers

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