| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable reasonable and smooth following relative oscillation in the allowable oscillation angle range of two pipe parts as an effect for preventing separation between two pipe parts is improved by firmly fastening and fixing a slip-off preventing ring body against the outer peripheral surface of an insertion pipe part and an effect to prevent separation between two pipe parts is improved by increasing an engaging margin in the direction of a diameter between the lock part of the slip-off preventing ring body and the protrusion part on the outer peripheral side of a hub pipe part. SOLUTION: A slip-off preventing ring body A provided with a slip-off preventing member 4 capable of cutting through the outer peripheral surface of an insertion pipe part 2 and a lock part 6a to block pull-off movement of two pipes 1 and 2 making contact with a protrusion part 1d of a hub pipe part 1 from the direction of a pipe axis X is divided into a first slip-off preventing ring body 5 having a holding part of the slip-off preventing member 5a of the slip-off preventing member 4 and a second slip-off ring body 6 having a lock part 66a. A bending coupling means 7 is provided to bendably intercouple the first and second slip-off preventing ring bodies 5 and 6 in a state that relative oscillation in a set oscillation range of the two pipe parts 1 and 2 is allowed.</p> |
