Patent ID: 8376122

Claim:
A stop device which stops a workpiece being conveyed by abutting against the workpiece, comprising: a swinging unit which includes a workpiece abutment portion which stops the workpiece being conveyed by abutting against the workpiece, and is pivotal between an abutment position at which the workpiece abutment portion protrudes to a level higher than a lower surface of the workpiece and abuts against the workpiece and a retraction position at which the workpiece abutment portion retracts to a level lower than the lower surface of the workpiece and the workpiece is not in contact with the workpiece abutment portion; an elastic member for said swinging unit which gives a biasing force to said swinging unit in a direction to locate said swinging unit at the abutment position; an electromotive drive unit including a movable portion which is coupled to said swinging unit and a driving portion which moves the movable portion in a direction in which said swinging unit pivots toward the retraction position; and a pivot restricting member which performs pivot restriction of said swinging unit by moving to engage with said swinging unit in response to movement of the movable portion and releases the pivot restriction.