| 摘要 |
<p>PROBLEM TO BE SOLVED: To facilitate removal by engaging a hook for removal provided on a running body in a thrusting pipe with the hook of a linear and radially inward moving the liner. SOLUTION: A liner 21 alternately adheres a plurality of metal-made body parts 23 and elastic members to be formed annularly. In the case where the liner 21 is removed, while a liner removing device 31 is traveled in a pipeline by a winch and observed by a CCD camera 52, a hook for removal 50 is stopped at a position where it approaches the liner 21, and the device 31 is temporarily welded on a pipe inside face. Next, a pantograph mechanism 47 is rotated to match the phase of the hook 50 to the hook 28 of the liner 21, and after the pantograph 47 is opened to match the radial position of the hook 50 to the hook 28, the hook 50 is engaged with the hook 28. After the device 31 is fixed on the pipe inside face, the pantograph is closed to act radial inward force to the body part 23 of the liner 21, and the elastic part is deformed to move the liner 21 to the pipe inside. As a result, removal can be easily performed.</p> |
