| 摘要 |
A more improved pipe-connecting device is provided in which a seal portion formed by a basal end portion of an inner ring and a pipe joint body satisfactorily functions, and a tip-end portion of the inner ring is not excessively diameter-contracted and deformed. In a pipe-connecting device having a pipe joint body 1, a union nut 2, and an inner ring 3 which is to be press-inserted into an end of a tube, a seal element portion y is formed in a basal end portion of the inner ring 3, and a seal forming portion k of the pipe joint body 1 is formed. The pipe-connecting device has a configuration where, in an assembled state, the seal element portion y and the seal forming portion k are pressed against each other, and a diameter-contracted tube portion 4c which is in a tube end portion 4C, and which is fitted onto a base-contracted diameter-contracted outer circumferential surface 3c, and a tubular screwing portion 1A are pressed against each other by a contact pressure which is lower than a contact pressure between the seal element portion y and the seal forming portion k, or separated from each other. |
