| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a welding torch. SOLUTION: The welding torch is provided with a torch main body 4, first flow passages 5a-5d, second flow passages 6a-6d, and a first communicating part. The first flow passages 5a-5d are arranged in the torch main body 4 along the axial direction of the body 4, and the cooling water flowing toward the front end side of the torch main body 4 passes through the first flow passages 5a-5d. The second flow passages 6a-6d are arranged in the torch main body 4 along the axial direction of the body 4, and the cooling water flowing toward the base end side of the torch main body 4, which is opposite to the front end side, passes through the second flow passages 6a-6d. The first communicating part makes the first flow passages 5a-5d communicate with the second flow passages 6a-6d. The first flow passages 5a-5d and the second flow passages 6a-6d are arranged on the same circumference on the cross section perpendicular to the axis of the torch main body 4. COPYRIGHT: (C)2009,JPO&INPIT
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