| 摘要 |
PURPOSE:To smoothly apply lining to a bent part, by increasing or decreasing the supply pressure of compressed air while a cable is pulled by constant tensile force when the reversed leading end part of a lining hose is stopped at the bent part of a pipe. CONSTITUTION:When the reversed leading end part 29 of a lining hose 5 is stopped at the bent part A2 of a pipe 2, the tensile force of a cable 16 is increased at first to be held to a constant value. In this state, a pressure reducing valve 12 is operated to reduce the internal pressure of the chamber 9 of a lining hose supply machine 6 and the leading end part 29 is shrunk. Next, when the pressure reducing valve 12 is operated to increase the pressure in the chamber 9 of the lining hose supply machine 6, the lining hose 5 is closely brought into contact with the inner peripheral surface of the bent part A2 of the pipe 2 to slightly advance and becomes a state 29b. By this method, by repeatedly increasing and increasing the pressure of compressed air, the lining hose 5 in the state pulled by the cable 6 can be advanced little by little at the bent part A2. |
