PROBLEM TO BE SOLVED: To solve a problem of a conventional flexible tube that the flexible tube buckles when the flexible tube is bent frequently by providing a flexible tube having a net and an outer sheath that hardly detach even when an endoscope is used for a long time.SOLUTION: The flexible tube includes a spiral tube 74 formed by spirally winding a strip-shaped plate, the net 76 covering the outer periphery surface of the spiral tube 74 and formed in a mesh by intercrossing a plurality of filaments 77, and the outer sheath 80 made of a resin and covering the outer periphery surface of the net 76. The filaments 77 of the net 76 is made of a fiber bundle in which three or more fibers are arranged in parallel. A resin fiber 77A having affinity toward the resin outer sheath 80 is arranged in the middle row of the fiber bundle, and metal fibers 77B are arranged in the other rows. In the flexible tube, the outer sheath 80 and the resin fiber 77A of the net 76 are bonded.COPYRIGHT: (C)2013,JPO&INPIT【課題】内視鏡を長時間使用してもネットと外皮とが剥離しにくいので、可撓管が頻繁に曲げ動作しても可撓管が座屈するという従来の問題を解決することができる。【解決手段】帯状板を螺旋状に巻回して形成した螺管74と、螺管74の外周面を被覆し、多数本の細線77を互いに交差させて網目状に編成したネット76と、ネット76の外周面を被覆する樹脂製の外皮80とで構成され、ネット76の細線77は3本以上の繊維を並列した繊維束で形成され、該繊維束の中心列に樹脂製の外皮80と親和性を有する樹脂繊維77Aが配置されると共にその他の列に金属繊維77Bが配置され、外皮80とネット76の樹脂繊維77Aとが接合されて成る。【選択図】図5
