| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly-rigid spindle structure wherein wear-correction and replacement work of a thrust washer or the like are facilitated, and the machining accuracy of components is lowered to prevent deviation of opposing electrodes. SOLUTION: An X-shaped portable gun is constituted so that gun arms 3, 4 with opposing electrodes 1, 2 provided on the chip ends are freely turnably supported by a spindle 9 and the electrodes 1, 2 are opened/closed by a presser 6. The X-shaped portable gun includes one gun arm 3 fixed and fastened to the spindle 9 by a fastener 22 and the other gun arm 4 across the gun arm from both outer sides in the axial direction, bearings 8, 14 for supporting the other gun arm 4 by the spindle 9, flanges 10, 15 and spacers 11, 16 on both end sides of the spindle 9, and the spindle 9. The spacers 11, 16 are arranged between both outer sides of the other gun arm 4 and the flanges 10, 15. The spacers 11, 16 are adjustably fastened in the axial direction by the flanges 10, 15, and the tip ends of the opposing electrodes 1, 2 are fixed at the normal positions. COPYRIGHT: (C)2011,JPO&INPIT
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