| 摘要 |
PROBLEM TO BE SOLVED: To prevent the other piece from being co-rotated when a screw member is rotated so as to fasten one piece and the other piece in an axis direction, by interposing a thrust bearing between the pushing/pressing surface of the screw member and the other piece. SOLUTION: One piece on a side of container valve is formed of a joint piece 10, and the other piece which is sealed and attached to piping 2, is formed of a joint piece 20. A ring-shaped elastic member 26 is mounted on the seal surface 25 of the joint piece 20 so as to be brought into tight contact with the seal surface 25 of the joint piece 10. Then, a thrust bearing 40 is interposed between the pushing/pressing surface 33 of a nut member 30 as a screw member and the engaging part 21 of the joint piece 20, thereby frictional force generated between the nut member 30 and the joint piece 20 can be reduced. Hereby, even though the nut member 30 is rotated, such a state can be prevented that the joint piece 20 is followed after the nut member 30 so as to be co-rotated. |
