| 摘要 |
PCT No. PCT/JP90/00366 Sec. 371 Date Nov. 19, 1990 Sec. 102(e) Date Nov. 19, 1990 PCT Filed Mar. 19, 1990 PCT Pub. No. WO90/11160 PCT Pub. Date Oct. 4, 1990.A variable pitch spot welding gun assembly for a welding robot has a fixed base (16) directly attached to the robot wrist (12) of an industrial welding robot, welding transformers (24, 26) fixed to the fixed base (16), a fixed spot welding gun (22) provided apart from the welding transformers (24, 26), a movable spot welding gun (20) provided apart from the welding transfomers (24, 26) and capable of being moved relative to the fixed spot welding gun (22), to adjust a pitch between the fixed spot welding gun (22) and the movable spot welding gun (20), and secondary conductors (44a to 44e) connecting the fixed and movable spot welding guns (22, 90) respectively to the welding transformers (24, 26).
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