| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a joining structure of a sleeve which can achieve joining strength stably while keeping good joining condition between a socket member and spigot member, and shorten time required for construction working remarkably by making adhesion between the socket member and spigot member unnecessary and eliminate influence on environment during construction. <P>SOLUTION: A first engaging piece 214 radially projected outward is arranged in an outer peripheral surface of tip side part 212 of spigot member 21 arranged in one side end of a first small diameter sleeve 111, and second engaging pieces 224 radially projected inward from its circumferential 4 locations are arranged in an inner circumferential surface of tip side part 222 of socket member 22. Furthermore, a notch part 23 making each second engaging piece 224 permit elastically deforming toward a radial outside of it is arranged on the socket member 22, and a first vertical surface 215 of the first engaging piece 214 is made to be engaged with a vertical surface 220 of each second engaging piece 224 naturally and smoothly by getting over each second engaging piece 224 when the spigot member 21 is inserted into the socket member 22. <P>COPYRIGHT: (C)2012,JPO&INPIT |
