| 摘要 |
PURPOSE:To improve the reliability in piping by forming the engagement part of a stopper remember into an arcuate form and increasing the engagement area. CONSTITUTION:In the state where the first and second members 1 and 2 communicate, the engagement part of a stopper member 3 is formed to an arcuate form, and the engagement area by the stop member 3 can be increased. Accordingly, the engagement force in the axial direction of the first and second members 1 and 2 can be increased. Accordingly, even if a force to pulling out the second member 2 from the first member 1 acts, the second member 2 is not pulled out. Further, even if the second member 2 is to be inserted into a receiving hole 11 furthermore, the second member 2 can not be inserted furthermore, since a ring-shaped projection part 21 contacts the top part edge 10e of the main cylinder part 10 of the first member 1. Accordingly, the chattering in the axial direction of the first and second members 1 and 2 can be suppressed surely. Accordingly, the reliability of piping can be improved. |
