| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a pipe joint that is telescopic and allows reduction of sealing parts. <P>SOLUTION: The pipe joint 10 includes an inner pipe 20, a middle pipe 30 and an outer pipe 40, and by making a screw 42 formed in an inner circumferential surface 40B of the outer pipe 40 to be screwed with a screw 35 formed on an inner circumferential surface 32C of a cylinder part 32 of the middle pipe 30, the inner pipe 12 can be displaced relatively together with the outer pipe 40 axially with respect to the middle pipe 30. Further, an inner circumferential part 32B of the cylinder part 32 of the middle pipe 30 and an outer circumferential part 14A of a first cylinder part 14 of the inner pipe 12 constitute a sliding surface, and the inner circumferential part 32B of the cylinder part 32 of the middle pipe 30 and the outer circumferential part 14A of the first cylinder part 14 of the inner pipe 12 are sealed by an o-ring 52. <P>COPYRIGHT: (C)2013,JPO&INPIT |
