| 摘要 |
The spot welding head comprises a spot electrode 6, a spot electrode supporter 3 holding the electrode 6 on its tip, a base member 2 holding the supporter 3 in such a manner that the supporter can swing on a first pin 4, a frame 1 holding the base member 2 in such a manner that the member can swing on a pivot pin 14 as a second pin, a guide 17 for guiding the base member 2 relatively to the frame 1 in such a manner that the member can slide longitudinally, a first actuator 5 connected at its one end to the supporter 3 for swinging the supporter relatively to the base member 2 when a steel strap is spot-welded, and a second actuator 9 connected at its one end to the frame 1 and at its other end to the base member 2 for swinging or sliding the member relatively to the frame.
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