| 摘要 |
PROBLEM TO BE SOLVED: To provide a pipe joint using an inner core which can be simply fitted to a fluid pipe, which can prevent from coming off even though no relative movement between a tapered surface and a lock ring is prevent. SOLUTION: An inner core 8 is composed of a cylindrical body part 8a having a thin wall thickness, and an introduction part 8b having an outer diameter which is small than the outer diameter of the body part 8a and as well smaller than the inner diameter of the fluid pipe 2. The diameter changing part which is a border point between the body part 8a and the introduction part 8b is arranged in the vicinity of a rock ring 5 after they are joined together, and accordingly, it can be inserted in a part of the inner core 8 having a diameter which is smaller than the inner diameter of the fluid pipe 2. The efficiency of the insertion of the pipe joint can be enhanced, thereby it is possible to facilitate the fitting thereof. |
