| 摘要 |
<p>The present invention relates to a coupling apparatus of a cable tray for ceiling wiring which can improve workability by performing a connection work of each tray simply and rapidly and also can reduce danger of a negligent accident due to a high place work, when a required number of trays supporting a number of communication lines and electric wire cables arranged on a ceiling of a large structure are installed as being spliced. In the coupling apparatus for coupling the cable tray for ceiling wiring which includes a pair of side frames comprising a first insertion hole, and a number of crossbars being installed between each side frame in a fixed interval and supporting the communication line and the electric wire cable, the coupling apparatus includes: a holder which accommodates one end of an adjacent side frame to both sides; and a cover which confines one end of the adjacent side frame accommodated in the holder by being combined to the holder by a hinge. A support plate comprising a second insertion hole inserted with a snap ring as having the same position as the first insertion hole of the adjacent side frame is formed on an inner side of the holder, and an insertion stage comprising a third insertion hole of a hexagonal shape being inserted with a tension nut and being linked to the second insertion hole is formed on an outer side of the holder. The support plate forms an insertion hole which is inserted with a grounded copper plate, and the cover forms a fourth insertion hole having the same position as the first insertion hole of the adjacent side frame. The coupling apparatus confines one end of the adjacent side frame accommodated in the holder by the cover, and then, couples the cable tray to the tension nut rapidly and simply by inserting the bolt into the fourth insertion hole, the third insertion hole, the second insertion hole and the first insertion hole in sequence.</p> |
