WORKPIECE LENGTH DETECTION DEVICE IN INSERT FORMATION SYSTEM BY ROBOT

摘要

PURPOSE:To dispense with stoppage of a robot, and to shorten tact time by providing a rotating deviation meter which rotates when the tip end of a workpiece retained at a plate insertion port is abutted thereon during movement of an escape plate, and by measuring the workpiece with the rotation angle. CONSTITUTION:A workpiece 12 fed from a parts feeder 11 is inserted into a workpiece insertion port 13 of an escape plate 10. Next, a rotary actuator 14 turns at 90 degrees to start escape motion, and the workpiece 12 abuts against the tip end inclination face 17a of a plate 17, and then the plate 17 is rotated. Due to the rotation angle, internal resistance changes, and output current varies by charging a specified current. Hereat, in case of a long and short workpieces, the rotation angles differ, and the difference between the lengths of workpieces come to be the difference between the amounts of current. This current amount, therefore, is electrically read out to judge inferiority in the lengths of workpieces.