| 摘要 |
PROBLEM TO BE SOLVED: To freely rotate an attached pipe. SOLUTION: With axial displacement of a pipe P, a retaining ring 2 moves along an inclined surface 3b to be diametrically contracted, a locking claw 2a of the retaining ring 2 is bitten into an outer peripheral surface P2 of the pipe P, an outer cylinder 3 is integrally attached to the pipe P through the retaining ring 2. In this state, the pipe P is capable of rotating against a nipple portion 1 through a packing 4. |
