| 摘要 |
PROBLEM TO BE SOLVED: To prevent the lateral deflection of an inserted fluid duct by providing a sleeve between two telescopic holding arms, and providing a fastening means with an axial extensible rib adjacent to a fluid duct holding rib to be inserted through an insertion opening of the sleeve. SOLUTION: A plug-in coupling is used so as to connect pipe socket-shaped fluid ducts 1, and provided with a fluid duct 1 capable of being fitted in a tubular fluid duct 5. The coupling is also provided with a cylindrical sleeve 6, a fastening means 7, two seal rings 8, a spacer ring 9 arranged between the seal rings 8, and a protecting cover ring 10 made of a rubber expandable member. The fastening means 7 is formed of a closed ring 17 having two telescopic holding arms 18 and two telescopic releasing arms 19 formed on the holding arms 18, and a hook 20 provided in the holding arm 18 is engaged with a free end of the holding rib 2 at the time of fitting the fluid duct 1 to the fastening means 7. |
