| 摘要 |
PROBLEM TO BE SOLVED: To provide a tool for preventing the movement of a joint capable of locking a lock claw of a lock portion with a peripheral surface of an insertion port without damaging the insertion port when both openings tend to move relative to each other. SOLUTION: A lock portion 12 comprises a first lock claw 16a for locking the lock portion 12 with the peripheral surface of an insertion port by inclining the lock portion 12 inside of a recessed part in the case wherein both openings are being to be relatively moved in separating directions, in which both the openings are separated in the pipe axial direction, a second lock claw 16b to be locked with the peripheral surface of the insertion port when both the openings are being to be relatively moved in opposite directions each other, and an abutment portion 15 for transmitting reaction force to the first or the second lock claws 16a or 16b by abutting on the inner wall when the lock portion 12 is inclined. A cross-sectional shape of the lock portion 12 including the pipe axis is formed into a nearly symmetrical shape by arranging the abutment part 15 around a cross line D, which nearly crosses the pipe axis, on the cross line D or near there, and arranging both the claws 16a and 16b nearly symmetrically. COPYRIGHT: (C)2009,JPO&INPIT |
