OPENING-DEGREE DETECTING APPARATUS FOR WELDING GUN

摘要

A degree of opening detecting apparatus for a welding gun of the type in which a pair of arm holders for holding a pair of gun arms are pivotally supported on a gun bracket and the piston rod of a pressure cylinder attached to one of the arm holders is connected to the other arm holder so that the gun arms of the welding gun may be opened and closed by operation of the pressure cylinder, said apparatus comprising a displacement detector attached to the pressure cylinder so as to detect displacement of the piston rod.