| 摘要 |
PURPOSE:To execute the inner lining of an existing pipe by a method wherein spiral pipes are inserted successively into the existing pipe, the front ends of the spiral pipes are fixed to the existing pipe, a wire rod buried into an engaging section is drawn and broken only in the mutually superposed one engaging section of beltlike bodies, the other engaging section is slid, and the diameters of the spiral pipes are expanded. CONSTITUTION:A spiral pipe 10' manufactured in a specified diameter by a pipe making machine 20 is introduced successively into a sewer pipe 81, and propelled in the axial direction while being turned. The front end section of the spiral pipe 10' is fastened to the sewer pipe 81, and the pipe making machine 20 is driven while a wire rod 30 extended to the front end section of the spiral pipe 10' is drawn in the axial direction of the wire rod 30. The wire rod 30 cuts the base end section of the strut section 18a of a fitting projection 18 into which the wire rod 30 is buried. A beltlike body 10 is fed in succession by the pipe making machine 20, the fitting recessed strips 15 of the beltlike body in the spiral pipe 10' and the inserting section 13b of a fitting projection 13 fitted into said fitting recessed strip 15 are slid mutually, and the diameter of the spiral pipe 10' is expanded from the fixed front end side. The spiral pipe 10' is fast stuck onto the inner circumferential surface of the dewer pipe 81. |
