| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite motor-driven welding gun wherein an adjustment of pressurizing force and an adjustment of a releasing stroke in each welding gun are extremely easy, moreover pressurizing force of electrodes is not affected by wear of the electrodes and bearings and deflection of a gun arm changing every pressurizing or the like, correct pressurizing force is outputted to set pressurizing force by simple control, and stable pressurizing force is obtained, in a composite motor driven welding gun provided with a C-C type having plural movable arms, a C-X type having the movable arm and a rocking arm which rocks, or an X-X type having plural rocking arms. SOLUTION: An arm 2 in which plural electrodes 3, 4 are disposed or plural arms in which the electrode is respectively disposed are fixed to the side of a gun bracket 1, the electrodes provided in the fixed arm are respectively faced to the electrodes 11, 12 provided in the respective movable arms 13, 14, a reduction gear connected to the output shaft of an electric motor 7 is attached to the gun bracket side, a rocking lever 10 is attached to the output side of the reduction gear, and respective movable arms are advanced or retreated toward or from the rocking bar via a roller 19 and a guide member 17 or via a link.
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