| 摘要 |
<p>PROBLEM TO BE SOLVED: To reliably block the breakage of a tube body through proper elongation of a tube body even when an improper external force is exerted on a flexible tube. SOLUTION: A plate 9 is fitted in externally of an expandable tube body l, having two end parts at which respective joints 3 are arranged, so that the deformation thereof is blocked and the two end parts of the plate 9 are fixed on the outer peripheral surface of the joint 3 by a fixing means. In a so formed flexible tube, with the tube body 1 contracted, the tube body is incorporated in the blade 9 and when an external force is exerted, the blade 9 is broken or the blade 9 is released from a fixed state prior to the breakage of the tube body 1.</p> |
