| 摘要 |
PROBLEM TO BE SOLVED: To provide a lock ring which forms a stabler joint structure.SOLUTION: There is provided a lock ring 1 for pipe joint such that: a ring part 2 is tapered to be larger in diameter on the side of an opening of a socket 11, and also divided at one place to be elastically expandable in diameter; the ring part 2 is provided with a plurality of leg projections 3 raised in outer-diameter directions; when the ring part 2 is put in a lock ring groove 13, a large-diameter end of the ring part 2 and the leg projections 3 restrict movement in a pipe axial direction; when pulling-out force is applied on an insertion hole 12 from the socket 11, an anti-loosening projection 16 at an outer periphery of the insertion hole 12 abuts on a small-diameter end of the ring part 2 to stop the insertion hole 12 from coming out of the socket 11. A leg projection which faces the division part of the ring part 2 among the leg projections 3 is formed by bending both ends at an angle of inclination to a peripheral direction, and an end face of the leg projection 3 is in level with a small diameter-side end face of the ring part 2 while connecting with a base part. |
