Patent ID: 7762757

Claim:
A workpiece transfer system comprising a bracket rotatably supported on a support part, a rotary drive device provided on the support part in order to rotate the bracket, a workpiece support arm vertically, swingably and axially supported on the bracket, a swing drive device provided on the bracket in order to swing the workpiece support arm, a workpiece retaining device provided on a tip end part of the workpiece support arm and-configured to retain a workpiece that is to be transferred, and a restricting device for restricting an angle of the workpiece support arm, which is swung vertically by operation of the swing drive device at a predetermined fixed angle so that when the workpiece is retained by the workpiece retaining device a center of gravity of the workpiece will be located on an axis of rotation of the rotary drive device or in the vicinity thereof , and operation of the rotary drive device enabling the bracket to be rotated while the workpiece support arm is set at the predetermined swing angle by the restricting device.