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Coordination of robot and conveyor

  • US 3,958,682 A
  • Filed: 06/09/1975
  • Issued: 05/25/1976
  • Est. Priority Date: 11/05/1973
  • Status: Expired due to Term
First Claim
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1. In combination, an industrial robot having a work head operable through a range of positions and having control means programmed for causing the work head to perform an automatic program of operations and three-dimensional motions relative to a work-piece at rest, a conveyor including a work carrier for transporting the work-piece along a path in the operative range of the work head, the work-piece and its work carrier forming a work unit, and means for modifying the control of the work head by the programmed control means in accordance with the travel of the work unit, said modifying means including means for providing corrective output having a starting condition, and means for operating said corrective output means out of said starting condition in synchronism with the travel of the work unit, said operating means including an endless chain, means for supporting said chain and for disposing a length thereof for movement along a chain-advance path adjacent and parallel to said path of the work carrier, said chain-supporting means including at least one sprocket and said chain being operable endlessly in one direction about said sprocket, transmission means for providing drive of said corrective output means by said sprocket, locking means for coupling said chain to said work unit to be driven thereby and for operating said corrective output means throughout the automatic program of the work head and for thereafter releasing the chain from the work unit, and means for restoring said corrective output means to its starting condition after completion of said automatic program while said chain is operated at any rate including zero in said one direction.

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