Cable tray

Claim 1

A cable tray comprising: a cover plate having downwardly depending side portions; a pair of side plates arranged opposite to each other, the upper end of each of said side plates being bent outwards and at a right angle to form a flange on which a side portion of the cover plate is overlapped, the lower end of each of said side plates being bent outwards and at a right angle to form a supporting face, the outer end of said supporting face being further bent upwards to form an engaging face, both of said side plates being provided with openings at their lower sides, said openings being arranged to have a predetermined distance therebetween in the longitudinal direction of the side plates, the openings provided on one said side plates corresponding to the openings provided on the other of said side plates; supporting frames having both ends thereof inserted into registering openings in said side plates and each end of a supporting frame resting on a supporting face; means for fixing at least some of said supporting frames to said supporting faces; and fastening means comprising a first fastening member of which one end is bent at right angle to form a pressing face and of which the other end is slanted to form a sliding face, a second fastening member similar to said first fastening member and having a pressing face and a sliding face, and a fastening screw passing through a hole provided in said first fastening member and being screwed into a hole in said second fastening member, the overlapped cover plate and flange being sandwiched between the pressing faces of said first and second fastening members.