| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a connection unit which is used for turning the direction of the holes of a multi-holes conduit which consists of a number of connected multi-holes block which are made of concrete and having a plurality of parallel holes, respectively. SOLUTION: A connection unit is composed of a plurality of resin pipes 13 and a connection block 15 which holds the one side ends of the resin pipes 13. As the resin pipes 13 having flexible corrugated pipe parts 13a, they can be beat. The connection block 15 holds the straight pipe parts 13b of the resin parts 13. Therefore the spacings between the corrugated pipes 13a can be reduced and the block can be compact. As the flange-shaped stoppers 13c of the resin pipes 13 are retained by the recess trenches 21 of the connection block 15, the resin pipes 13 are not drawn out of the connection block 15.</p> |
