| 摘要 |
PROBLEM TO BE SOLVED: To prevent slipping-out by upward parting of a quick fastener by increasing frictional force, by constituting it of leg piece parts to which tip parts of the leg piece parts are connected and a long hole which is formed between these leg piece parts and to/on which an outside weir part of a recessed groove is fitted/locked in a close contact state. SOLUTION: The opening part side of respective leg piece parts 21 and 22 of a quick fastener 20 is pressed in the piping connecting direction after butting an outside weir part 3 of a three-way connecting pipe 1 and an inside weir part 19 of an adapter. The respective leg piece parts 21 and 22 of the quick fastener 20 are fitted to/locked on respective recessed grooves 6A of the three-way connecting pipe 1 and a recessed groove 17 of the adapter by moving backward in the contracting direction by the elasticity after expansively opening outward. The outside weir part 3 of the three-way connecting pipe 1 and the inside weir part 19 of the adapter are fitted to/locked on a long hole 25 of the quick fastener 20 in a close contact state. Therefore, the three- way connecting pipe 1 and a through pipe 10 can be communicated with/connected to each other by very simple operation. Slipping-out by upward parting of the quick fastener 20 can be prevented by improving frictional force by largely securing the butting area of the leg piece parts. |
