| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrode jig for welding a sink having the assembling structure of sheets consisting of a longitudinal material and a lateral material. SOLUTION: The electrode jig is composed of a back bar having a similar figure to the weld focus of a lap joint part formed by lapping a flange formed on the periphery of the opening part of the above water bath part and the periphery of the opening part of a top board by inserting the water bath part into the opening part of the top board of the sink, the lateral material including the copying cam of a weld line, which induces the above weld joint part on the center line of the pressure of the above electrode ring together with the above back bar, the longitudinal material assembled freely attachably and detachably on the above back bar and the above copying cam and a base plate assembled attachably and detachably on the above copying cam. The above longitudinal material is composed of plural sheet materials and it is conditioned that the above longitudinal material has been assembled in a four-sided figure.
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