| 摘要 |
PURPOSE: A structure reinforcement spiral tube for a water pipe is provided to reinforce weak points in the water pipe on applying the biased load onto the water pipe. CONSTITUTION: Hollow parts are stacked in two or three layers. The stacked hollow parts are bent at both walls to form a bending band and upper and lower hollow parts(24) with being integral with a melting band(13). A depth portion is divided into two or three parts to integrate a melt reinforcing layer with upper and lower surfaces(15,16) of the hollow parts. The weak ports on the water pipe are reinforced to endure the biased load applied onto the water pipe.
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