| 摘要 |
PROBLEM TO BE SOLVED: To provide a connecting structure of pipe lines of service water pipes etc. capable of preventing the connection part from slipping off using a simple configuration and facilitating the length adjustment of the connection part. SOLUTION: The connecting structure of the pipe lines of service water pipes etc. is configured so that a socket 1 furnished with a flange part 13 is formed at one end of each pipe, a rubber ring 3 is set on a connection pipe 2 which is inserted into the socket, and that the flange part 13 and a press ring 4 are coupled together by a bolt 5 and a nut 6 in such an arrangement that the press ring 4 presses the rubber ring 3 so as to secure the water-tightness. An engaging projection 21 is formed on the periphery in a part near the tip on the insertion side of the connection pipe 2, while a spiral groove 12 to admit fitting-in of the projection 21 is provided at the internal circumferential surface of the socket (receiving part 11), and upon putting projection 21 alongside the spiral groove 12 and inserting the connection pipe to the specified depth, the rubber ring 3 is pinched in pressure by the flange part 13 and the press ring 4 and coupled as in the conventional manner, whereby the water-tightness of the line connection part can be secured, and the straight movement in the slipoff direction of the connection pipe in the applicable position can be prevented owing to the engagement of the projection with the groove. COPYRIGHT: (C)2005,JPO&NCIPI
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