| 摘要 |
PROBLEM TO BE SOLVED: To provide a pipe coupling capable of preventing slipping-out of a pipe body in pressurization, by eliminating an insertion shortage of the pipe body. SOLUTION: A coupling body 3 has a large diameter part 3a, a small diameter part 3b and a first through-hole 3c forming a screw groove 3e in an outer peripheral part. Core metal 10 is fitted to and inserted into the tip part inner peripheral side of a hose 13, and the inner end side of the core metal 10 is arranged in the first through-hole 3c. A sleeve 11 is fitted to and inserted into the tip part outer peripheral side of the hose 13. A fastening nut 9 is connected to the pipe body connecting side end of the coupling body 3 while diametrlly contracting the sleeve 11 by threadedly engaging with the screw groove 3e of the coupling body 3. When completely fastening the fastening nut 9, clearance C1 is formed between the large diameter part 3a and the fastening nut 9. A through-hole 15 for visually confirming the inside of the coupling body 3, is formed in a place capable of forming the clearance C1 in the small diameter part 3b. COPYRIGHT: (C)2006,JPO&NCIPI
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