| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of satisfactorily manufacturing a high grade flexible tube satisfied with push-in, torque transfer and follow-up properties at the same time, without crushing the shape of lumina. SOLUTION: The method of manufacturing the flexible tube comprises, at least, (1) a core contained inner tube forming step of forming a core contained inner tube consisting of an inner tube having an approximately circular outer periphery and a plurality of cores arranged in the inner tube, passing between both ends in the axial direction without contacting one another, (2) a reinforcing material layer forming step of braiding one or more wire material to be meshed so that angles to the axial direction of the inner tube are changed stepwise or continuously along the axial direction to form a reinforcing layer on the outer surface of the core contained inner tube, (3) an outer tube forming step of forming an approximately cylindrical outer tube to be fixed to the outer surface of the core contained inner tube via the reinforcing material layer, and (4) a core pull-out step for pulling the cores out of the core contained inner tube. |
