| 摘要 |
PURPOSE:To shorten drastically the length of a tube whose diameter is enlarged and the length of a cylindrical supporting body, by enlarging the tube having rubbery elasticity in its radial direction by using an expandable hollow body and the cylindrical supporting body, winding the rubber tube from both ends of the tube and fixing it on the cylindrical supporting body. CONSTITUTION:A cylindrical supporting body 2 is placed coaxially on the central part of a tube 3 having rubbery elasticity. An expandable hollow body 4 which is properly folded in a free shape in such a way that it can be extended in the axial direction of the tube and can be enlarged in the outer diameter being the same as or larger than the inner diameter of the cylindrical supporting body 2 is inserted through the above described tube 3, which is expanded by pouring a pressurized fluid therein. The above described tube 3 having rubbery elasticity is uniformly wound in the circular circumferencial direction toward the above described cylindrical supporting body 2 by making the end parts of the tube 3, whose diameter is enlarged, and having rubber elasticity, as the centers. The tube 3 having rubbery elasticity wound on the both ends of the above described supporting body 2 is fixed and thereafter the pressurized fluid is released to pull the expanded hollow body out. The tube 3 can be thereby supported by the hollow cylindrical supporting body 2 and an elastic self-shrinkable properties is given to it. |
