| 摘要 |
PURPOSE: A stud chuck for welding a stud bolt is provided to prevent the loosening of screw coupling by interposing a washer between an elasticity reinforcing nut and a flange. CONSTITUTION: A stud chuck for welding a stud bolt comprises elastic pieces(111), an elasticity reinforcing blade(92), and a washer(8). The elasticity reinforcing blade is formed in a fastening nut(9) for fixing a chuck adapter(4) and a stud chuck(1) and applies a fixed pressure to the elastic piece while surrounding the elastic pieces divided by cut grooves(101). The washer is formed between the fastening nut and the stud chuck and tightly fixes the stud chuck to the chuck adapter in order to prevent the loosening of the fastening nut. The washer is formed into a disk shape with angled saw teeth cut at regular intervals.
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