| 摘要 |
PURPOSE: A wire bracket welding jig of a crane boom is provided to control welding angle and location of a wire bracket and to weld the wire bracket at an exact position. CONSTITUTION: A wire bracket welding jig of a crane boom comprises a vertical positioning board(3), a torsion preventing board(4) and a side board(5). The vertical positioning board is rectangular board-shape having the same width as the width of a boom. The vertical positioning board has first insertion protrusions(31) in four edges. The torsion preventing board has a first insertion groove(41) and a second insertion protrusion(42). The second insertion protrusion is welded in the back and forth of the vertical positioning board.
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