Fluid introduction type hollow hole forming tube and tube system using this tube

摘要

[Problem] To provide a fluid introduction type hollow bore-forming tube in which large diameter openings on both ends and a large diameter hollow bore in the inside are formed extending in a straight line from a folded state, wherein the large diameter hollow bore can be used as a multipurpose passage. [Solution] The fluid introduction type hollow bore-forming tube of the present invention is provided with a plurality of small diameter hoses (31-310) of a predetermined length which are opened at at least one end, have a hollow bore in the inside which is in communication with the opening, and which expand when a fluid is injected into the hollow bore from the opening on the one end. These small diameter hoses are spirally wound, with the openings of the hoses at the one end aligned, in the longitudinal direction on the circumference of a circle or oval having a diameter of a size in which, when the fluid is injected into the hollow bores, large diameter openings on both ends and a large diameter hollow bore in the inside communicating with the large diameter openings are formed. The small diameter hoses are in a state capable of being folded or wound before the fluid is injected. When the fluid is injected from the one end, the other end is closed so that the small diameter hoses expand in turn from the pressure of the fluid, and extend from the folded or wound state to form the large diameter openings (2a, 2b) and the large diameter hollow bore.