| 摘要 |
PROBLEM TO BE SOLVED: To feed a bolt to be welded not from a side but from an upper part to a part to be welded of a work from its feed source without through any special feed device. SOLUTION: A pair of bolt receivers 25, 25 are provided on a vertically moving electrode holder 22 in an elevating/lowering and opening/closing manner, a receiving part to form a tip-recessed receiver 51 across a lower side of an upper electrode 23 is formed on a lower part of both bolt receivers 25, 25, and a chute part 48 to introduce a bolt B to be welded into the tip-recessed receiver 51 is provided an upper part of a receiving part of one bolt receiver 25. The bolt B is directly introduced from its feed source immediately below the upper electrode 23, and fed from an upper part to a part to be welded of a work.
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