Jig for welding

PURPOSE: To simply position a frame and to enable sure removal of the frame even in the event of a welding deformation by pressing the frame arranged in a fitting groove against the fitting groove via a ball plunger for positioning. CONSTITUTION: A welding jig is constituted of a base 2 and a plural number of the positioning tools 5 which are fixed on the prescribed position on the base and by which the fitting groove 51a is formed. In these positioning tools 5, the ball plunger 6 is provided which is composed of a ball 62 facing inside the fitting groove 51a and of a spring by which the ball 62 is energized in the direction to protrude to the fitting groove. Then, the positioning is done by pressing the frame 5, by which the fitting groove 51a is arranged, against the fitting groove 51a via the ball plunger 6. Thus, the frame is simply and surely removed with a little force. COPYRIGHT: (C)1993,JPO&Japio