Destal structure of the ribbed pipe and the production mannered null inner skin of the wave

摘要

PROBLEM TO BE SOLVED: To provide the end structure of a corrugated pipe and its manufacturing method capable of easily connecting to a pipe body made of a different material from the corrugated pipe without using a pipe joint and considerably reducing the outside diameter of the connecting section. ;SOLUTION: The end structure for a corrugated pipe is formed connecting a polyethylene corrugated pipe 1 whose inner peripheral face is smooth and whose outer peripheral face has ridges 11 and valleys 12 sequentially and alternatively formed in parallel, with a straight hard polyvinyl chloride pipe 6. A spigot 21 of a transparent connecting socket 2 made of hard polyvinyl chloride having a socket 22 to which the straight pipe 6 is connected, is fitted to the inner periphery of the corrugated pipe 1. A polyethylene resin made fixing ring 3 is injection-molded astride both the outer periphery of the socket 22 of the connecting socket 2 and the outer periphery of the corrugated pipe end to fix them in a fitted and locked condition.;COPYRIGHT: (C)2003,JPO