| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of defects in conventional flexible pipe joints that twisting or elongation cannot be easily performed as reinforcement elements are spirally wound around them. SOLUTION: In this flexible pipe joint, a plurality of hard rings are integrally formed on an outer circumferential surface of a soft cylinder main body having a smooth inner surface and flexibility except for both end parts to be separate from each other in the axial direction. In the hard ring, reinforcement elements are incorporated. The hard ring has a through hole in the axial direction, and material forming the cylinder parts is inserted into the through hole. The hard ring has protrusions in its inner circumferential surface, and the protrusions are inserted into the flexible cylinder main body. COPYRIGHT: (C)2005,JPO&NCIPI
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