| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-size pipe joint structure surely preventing a male pipe and a female pipe from being pulled out. SOLUTION: This pipe joint connecting the male pipe 1 to the female pipe 2 by fitting is formed with radially opposed annular recessed grooves 14 and 26 in the mutually fitted internal and outer circumferential faces 11 and 24 of the male pipe 1 and the female pipe 2 and an insertion hole 27 penetrating from the recessed groove 26 of the female pipe 2 to the outer circumferential face. A wire rod 3 is inserted into the recessed grooves 14 and 26 from the outer circumferential part of the female pipe 2 via the insertion hole 27 with the male pipe 1 and the female pipe 2 fitted to each other, the radial movement of the wire rod 3 is limited in the bottoms of the both recessed grooves 14 and 26 so that the wire rod 3 is engaged thereto over the recessed groove 14 of the male pipe and the recessed groove 26 of the female pipe. A lock portion 31 is bently formed in the tip of the wire rod 3, the lock portion 31 is engaged with a lock hole 15 formed in the bottom of the recessed groove 14 of the male pipe 1, and the male pipe 1 and the female pipe 2 are relatively rotated so that the wire rod 3 is automatically inserted into the recessed grooves 14 and 26.
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