| 摘要 |
<p>1. Installation apparatus for conduits to contain electrical cables, said conduits being formed by a longitudinal series of channel plates (1) with a flat base (2) and side walls (3), provided with cover plates (4), each side wall (3) forming at its upper part a re-entrant tubular extension (6) parallel to the base, said extension (6) forming with the associated wall (3) an external groove (8) which has an angular cross-section with its upper face parallel to the base (2) and its other face at an oblique angle, said groove (8) being adapted to receive a similarly re-entrant flange (9) of a side edge (10) of the cover plate (4) of the plate (1), said flange (9) corresponding to the angular section, the wall (3) of the channel plate and the side edge (10) of the cover plate (4) being co-planar, characterised in that each side wall (3) has an inwardly slanting portion (5) at an oblique angle to the tubular extension (6), said extension having on its inner face a longitudinal rib (20), and in that the coupling between adjacent plates (1)is achieved by means of profiled pieces (12, 12A) formed by a flat wall (13), being placed simultaneously against the internal surfaces of the side walls (3) of two adjacent plates (1) and by upper (15) and lower (14) flanges, the upper flange (15) being formed in an arc having portions formed in three planes (15a, 15b, 15c), which portions press against the inwardly slanting portions (5), against the inner face of the tubular extension (6) and against the longitudinal rib (20) respectively, and the lower flange (14) being supported on the base (2) of the channelling plates and having apertures (19) which are elongate in the longitudinal direction.</p> |
