| 摘要 |
PROBLEM TO BE SOLVED: To provide a rigid fluid pipe joint wherein it does not cause looseness semipermanently while using a screw joint for the joint part of constituting components of a fluid pipe joint, in order to prevent the loosening of threading part of the fluid pipe joint in use and the trouble of a fluid pipe coming off a joint body resulting from the looseness. SOLUTION: The fluid pipe joint 70 comprises the joint body 10, a cylinder part 40 into which the connection end of the fluid pipe P is inserted, and engaging parts 17, 42 for threading the joint body 10 to the cylinder part 40. The threading part consists of a male screw portion 17a and a female screw portion 42a. A diameter-enlargeable cylindrical portion 17b is formed at the front end of the male screw portion and a recessed portion 42b is formed at the base end of the female screw portion where a diameter enlarged portion of the male screw portion enters. Both screw portions are threaded to each other and the diameter enlarged portion of the male screw portion is diameter-enlarged by a punch 100 for engaging with the recessed portion of the female screw portion to prevent the looseness. COPYRIGHT: (C)2009,JPO&INPIT
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