| 摘要 |
<p>An apparatus including: a sealing case having a branch-shaped branch hole formed in a first separate case and extending in the radial direction of an existing pipe; and a rubber packing for sealing a gap between the sealing case and the existing pipe, wherein: the first separate case is provided with a flange for allowing for attachment and removal of a boring machine; the sealing case is capable of reciprocating in the pipe axis direction; and the rubber packing forms: a first sealed area surrounding a portion of the sealing case where the branch hole is provided for shutting the branch hole; and a second sealed area being adjacent to the first sealed area, sealed against the first sealed area, displaced from the first sealed area in the pipe axis direction, and sized so as to be able to shut the opening bored by a cutter.</p> |
