| 摘要 |
PROBLEM TO BE SOLVED: To set the number of projections of corrugate pipes projected from a retainer without using a spacer, etc. SOLUTION: This coupler is furnished with a coupler main body 2 having a connecting hole 10 and a screw part 28, a nut 4 having a through hole 42 and a screw part 44 and a retainer 6 arranged in the connecting hole 10 of the coupler main body 2 free to be detached. In this case, the retainer 6 has a base part and a plural number of engagement click parts 34 provided with intervals in the peripheral direction, the base part 32 is installed on an inner peripheral surface of the connecting hole 10 of the coupler main body 2 free to be detached, and the nut 4 has a pressing part 46 to work on the base part of the retainer 6. When the nut 4 is fastened against the coupler main body 2, the pressing part 46 of the nut 4 works on the base part of the retainer 6, and consequently, the retainer 6 is detached from the coupler main body 2 and moves.
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