Patent ID: 9194528
Filing Date: 2015-11-24
Classification: F16L

Abstract:
1. A pipe rehabilitation method in which segments are linked in the circumferential and pipe-length directions to install a rehabilitation pipe inside an existing pipe, each of the segments comprising an inner surface plate, side plates provided upright on both sides extending in the circumferential direction of the inner surface plate, and inner plates provided upright between the side plates, the method comprising: securing a plurality of nuts to the segments along the circumferential direction thereof; preparing a linking member that can be screwed into one of the secured nuts; inserting the linking member into a segment; temporarily locking the linking member to the segment to prevent the inserted linking member from falling out of the segment using a temporary lock comprised of a sheet having at its center an opening for admitting insertion of the linking member; disposing the temporary lock in the segment so that the linking member can pass through the opening of the temporary lock, the linking member being temporarily locked to the segment due to a frictional resistance produced between the opening of the temporary lock and the linking member; aligning together the segment into which the linking member is inserted and one of the segments to which the nut is secured; and screwing the linking member into the nut to fasten both segments together and link them in the pipe-length direction.