| 摘要 |
PROBLEM TO BE SOLVED: To provide an anti-decoupling pipe joint which can save time in contracting the diameter of a lock ring, which can securely contract the diameter of the lock ring by a required force over its entire perimeter, and which can engage the lock ring with an outer peripheral groove of an insertion port. SOLUTION: A lock-ring housing groove 15 is formed on the inner periphery of a receiving port 12, and the outer peripheral groove 17 is formed on the outer periphery of the insertion port 14. The lock ring 18 housed in the lock-ring housing groove 15 receives a force in the diameter-contraction direction from an elastic body 25, and its part on the inner peripheral side gets caught in the outer peripheral groove 17 in a state where its part on the outer peripheral side is housed in the lock-ring housing groove 15. The elastic body 25 is constituted by arranging a plurality of pieces 32 formed in a three-dimensional structure by plate materials along the circumferential direction of the lock ring 18. The force in the diameter-contraction direction can be exerted on the lock ring 18 by the elastic deformation of each piece 32 in a flat state. COPYRIGHT: (C)2010,JPO&INPIT
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