| 摘要 |
<p>A pipe-coupling device comprises a joint body 2 having an opening 2h with external threads 2d to receive a pipe P, a locknut 5 having internal threads 5a engaged with the external threads 2d of the joint body 2, an annular core member 6 disposed within the locknut 6, and a plurality of locking members 7 retained in apertures 6d of the core member 6 to be spaced circumferentially apart from each other. Upon tightening rotation of the locknut 5 around the joint body 2, the internal conical surface 5c of the locknut 5 slidably contacts with the conical surfaces 7a of the locking members 7 so as to press the locking members 7 radially inwardly, to cause the gripping portions 7b of the locking members 7 come into gripping engagement with the outer periphery of the inserted pipe P, thereby strongly preventing withdrawal of the pipe P from the joint body 2 even when the pipe is made of hard material. <IMAGE></p> |
