| 摘要 |
<p>PURPOSE:To facilitate burrying work and to reduce cost by splitting a plastic pipe into two such that one of two splitted tubes has central angle in the range of 180 deg.-240 deg. then forming a dovetail groove and tenon, respectively, in the inner face at the splitted edge of one splitted tube and the outer face at the splitted edge of the other splitted tube. CONSTITUTION:A wire (a) is led out from indoor wiring then it is placed in one splitted tube 1a or 1b. Thereafter, the splitted tubes 1a, 1b are fitted each other in zigzag such that the end sections are not overlapped, then the tubes are burried and the wire (a) is connected with a gate light L and an interphone C. The splitted tubes 1a, 1b are cut to appropriate lengths at the opposite ends 1a', 1b' of the plastic pipe A. By such arrangement, the plastic pipe can be applied easily onto the wire resulting in facilitation and cost reduction of cable burying work.</p> |
