| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a small duct sleeve which reduces an economical burden of facilities and can be manufactured at low cost and easily installed. SOLUTION: In a multipurpose underground conduit, etc., the small duct sleeve 10 connects the underground conduit 2 with a special part 1 such as a hand hole and a manhole, etc., and comprises a tubular pipe component. The small duct sleeve 10 has a fixed part 11 which penetrates a wall 3 of the special part 1 and is buried and fixed, and a guiding part 12 for extending and contracting which extends from the fixed part 11 to the external of the special part 1 and in which the underground conduit 2 is fitted and mounted movably in the direction of an axis of the pipe. A trumpet shape guiding face 14 expanding toward outside is formed on an inner face of an end of the special part 1 in the fixed part 11. An inner face of the guiding part 12 is partially thinned and an annular groove 19 for mounting a sealing ring is formed.</p> |
