| 摘要 |
PROBLEM TO BE SOLVED: To stably seal by a packing by installing the packing in contact with a corrugated recess part and a connecting port inside face of a joint body and a spacer providing a packing installation part drawing the packing to the side face of the corrugated recess part and installing it therein in the corrugated recess part of a corrugated pipe. SOLUTION: A plastic corrugated pipe 10 is formed by providing an independent corrugated pipe 12 having an annular independent corrugated crest in the outside of a cylindrical pipe 11, and the corrugated pipes 10, 10 are connected by a joint 20. The joint 20 has a stopper 21 extended to the inside in the central part and tapered cylindrical connecting ports 22, 22 opened to an opening side are connected to its both sides. In connecting the corrugated pipes 10, 10, a plastic spacer 30 of a circumferentially two-split structure and a rubber packing 40 of a wedge-shaped cross section are installed on the corrugated recess 13 of a first crest in the end of each pipe 10 and each pipe 10 is inserted in the joint 20 in such a state that the side of the corrugated recess of the pipe 10 end is allowed to abut on the side face of the stopper 21.
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