| 摘要 |
<p>PURPOSE:To enhance working efficiency of a bridging structure and a joint part strong for detachment by bridging and joining the interval of a pair of thermally weldable sheet members which are opposed. CONSTITUTION:The bridging joint parts of a pair of sheet members 1, 2 are formed by a bridging member 3 having an I-section which is constituted of two sheets of thermally weldable sheets. The bridging member 3 is sandwiched between the electroconductive jigs 4, 4 for deposition and arranged in the prescribed planned joint position between a pair of sheet members 1, 2 spread in the interval of the upper and lower electrodes 5, 6 of a high-frequency welding device. Welded parts are formed between the respective members by energizing operation of one time. Thereby the bridge joint parts strong for detachment are welded by considerably simpler operations. Operation for turning over the long-sized sheet material is made unnecessary and working efficiency is remarkably improved.</p> |
