| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a structure preventing a sleeve from slipping off after connection for a pipe joint, not generating variation of connection strength with a simple work without causing leaking or breaking for a long time. SOLUTION: A cylindrical part fitting into an inner circumference of a pipe to be connected is provided on an end part of a joint body. A roughly cylindrical resin sleeve having an inner diameter fitting onto an outer diameter of the pipe is positioned on the outer circumference of the cylindrical part. One end of the sleeve 20 is large in the inner and outer diameters and another end of the sleeve is small in the inner and outer diameters. Section area of a stepped part at a center part is reduced. The stepped part at the center of the sleeve 20 is cut (sheared) by compressing the sleeve in an axial direction and a diameter of the small diameter part is reduced by override of the large diameter part on the small diameter part. The pipe is cramped between the joint body cylindrical part and the sleeve and is connected by reducing diameter of the small diameter part. A function of locking the large diameter part is added on the outer circumference of the smaller diameter part of the sleeve 20.</p> |
