| 摘要 |
Provided is a flexible hose 1 in which an inner core 10 is covered by a tube main body 11, and a helical uneven surface is formed on the tube main body 11 by winding an outer core 15 around the tube main body 11 so as to form a double helix structure together with the inner core 10. The inner core 10 is molded using a resin material so as to have a square cross section. The tube main body 11 is seamlessly molded using a resin material. The outer core 15 is molded using a resin material. The flexible hose is structured such that displacement between the inner core and the outer core is unlikely to occur due to the adoption of a structure in which a constrictive layer 17 is formed that inwardly presses and covers an outer circumferential surface of the outer core 15, that is fused to the outer circumferential surface of the outer core 15, and that restrains bulging of the inner core 10 in a radial direction. |
