| 摘要 |
PROBLEM TO BE SOLVED: To provide a hose allowed to be automatically expanded in a longitudinal direction and a lateral direction by applying pressure to fluid in the hose and allowed to be automatically contracted when pressure of the fluid in the hose is released.SOLUTION: A hose 10 includes an inside tube 14 made of an elastic material and an outside tube 12 made of a non-elastic material. The inside tube 14 is concentrically located on the inside of the outside tube 12 in both of a contracted state and an expanded state. The outside tube 12 is fixed on the inside tube 14 only on a first end part 18 of the inside and outside tubes 14, 12 and a second end part 16 of the inside and outside tubes. The outside tube 12, when the tube is transferred between the contracted state and the expanded state, moves in the lateral direction and the longitudinal direction against the inside tube 14. |
