| 摘要 |
A welder head comprises a pair of welding electrodes arranged opposite to each other through workpiece to be welded, an electrode holder including a sliding member for holding one of welding electrodes and a support member for supporting the sliding member slidably in an opposing direction of welding electrodes, a pressure mechanism for pressing the one of the welding electrodes toward the other of the welding electrodes through the electrode holder, an elastic member for urging the sliding member toward the opposing direction of the welding electrodes, and a U-shaped electricity feeder provided between the one of the welding electrodes and the support member of the electrode holder and for supplying a welding current to the one of the welding electrodes.
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