| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrical swinging arm gun using a motor as driving force for swinging the swinging arm, simple in constitution and small in tact- time loss, and excellent in cost performance and a welding speed. SOLUTION: In the electrical swinging arm gun having the arm 5 swung by the motor 10, electrodes 2, 3 are disposed respectively in the reverse direction at both sides in the top of a fixed arm 1 which is secured to a gun bracket 4, each of electrodes 8, 9 which is disposed respectively at both sides in the top of the swinging arms capable of swinging to the gun bracket 4 by the rotation of the motor, is opposed to the electrodes 2, 3 at the fixed arm, and the electrode of the swinging arm is operated in such a way that while one electrode is contact with the electrode of the fixed arm, another electrode is opening.
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