A trolley suspended on a rail comprising spaced side plates having rollers facing each other on the upper part and coaxial bushings on the lower part, a hanger plate suspended midway between the side plates by a stay rod which passes through said bushings, wherein the stay rod is coupled with a bushing on one of the side plates by a head pin passing through borings provided on said bushing and on one end of the stay rod, and the head of said pin is held down by a spring retainer which is in releasable engagement with the bushing.
In a travelling trolley assembly, the two side frame bars (6, 7) which extend on either side of the running rail (2) are connected to one another via two connecting columns (8). The connecting columns (8) are smooth and cylindrical on the outside are fitted into receiving or sliding-guidance devices which are formed in the side frame bars (6, 7) below the running rail (2). In order to adjust the distance between the two side frame bars (6, 7) and to fix the distance which has been set, receiving devices, through which a threaded rod (46) which is parallel to the connecting column (8) passes, are situated in the vicinity of the connecting columns (8). The distance is adjusted and fixed with the aid of screw threads (94, 95), preferably lock nuts, which rest on the connecting rod (46). This type of fixing arrangement does not damage the shape of the guide columns (8), so that dismantling is easy to carry out at any time.
