| 摘要 |
PROBLEM TO BE SOLVED: To provide a pipe joint separation prevention structure capable of exhibiting a separation prevention function by the contact of a lock member with an engaging protrusion of an inserting part.SOLUTION: At a socket side end 23 of a socket part 13, insertion/removal recessed parts 25 and retainer walls 26 which prevent coming-off movement by contacting latch pieces 31 from the shaft center direction when a lock member 30 inserted through the insertion/removal recessed parts 25 is rotated around the shaft center to a lock position, are formed. A restricting member 40 is provided that restricts the rotation in the circumferential direction with the lock member 30 rotated to the lock position. The lock member 30, formed in an annular shape, has the latch pieces 31 at one side and a flange 32 at the other side. A notch 35 to which the restricting member 40 can be fitted is provided in a part in the circumferential direction of the flange 32. The restricting member 40 is fixed to the socket side end 23 of the socket part 13 being fitted to the notch 35 of the lock member 30 and to the insertion/removal recessed parts 25 of the socket part 13 at the lock position of the lock member 30. |
