| 摘要 |
<p>PURPOSE:To surely apply a seal by mounting a cylindrical seal material inflow-preventing plug, possible to spread its size, to an end part opening, which communicates with the main pipe of a branch pipe, and filling a part, between the peripheral surface of a lining pipe and the internal peripheral surface of the main pipe and between the lining pipe and a water stop cock, with a seal material from a through hole. CONSTITUTION:When a seal material inflow-preventing plug 10 is mounted into a main pipe 81, a water stop member 12 is attached to a main pipe internal peripheral surface in a liquid- tight condition by fitting a protruding part 11k into a branch pipe 82 and placing an outer protruding stepped part 11h in a condition that it is adapted to an end part opening peripheral edge part of the branch pipe 82. Under this condition, a helical pipe 83, serving as a lining pipe, is inserted into the main pipe 81 and closely attached to an internal surface, a seal material is injected from a through hole 11p of the helical pipe 83 drilled by a drilling machine, space between the helical pipe 82 and a cock unit 11 of the seal material inflow- preventing plug 10 is filled with the seal material and an inflow into the branch pipe 82 is impeded by a check valve 11n. Next after the seal material is hardened, an opening part is formed so that the inside of the helical pipe 83 communicates with the branch pipe 82. In this way, a communication part with the branch pipe can be surely sealed by the seal material.</p> |
