GB703891A - Improvements in or relating to conveyors - Google Patents

Abstract

703,891. Conveyers. CABLE BELT, Ltd. Feb. 16, 1953 [March 3, 1952], No. 5550/53. Class 78 (1) In a conveyer comprising an endless belt or an endless loop formed from a plurality of spaced belt sections connected by cables, and driven by one or more cable circuits extending along the whole length of the conveyer, the belt engaging the cables by means of shoes which engage downwardly with the cables and are readily separable therefrom, driving means applying power to the cable circuits are provided at a point intermediate the head and tail ends of the conveyer. As shown the belt 25, Fig. 5, is driven by two parallel cable circuits 24, 24 with which it engages by means of disengageable shoe members 65 and at a point intermediate their upper runs, each cable circuit is guided in a local circuit away from the run by pulleys 56, 55 thence rearwardly to a pulley 58 and from thence forwardly over a pulley 57 to rejoin the upper run with a small lateral gap between the departure point from and the return point to that run, the lateral offset being effected by inclination of the pulley 58, and driving power being applied to the cable from the pulley 55. The belt 25 is provided at spaced intervals with flexible steel cross straps 64, Fig. 10, shoes 65 being mounted for limited sliding movement on each projecting end of the straps. Each shoe 65 comprises a steel tube 66, two metal side plates 67, 68 and a reinforcing bar 72, the shoe being retained on the steel strap 64 by a split pin 73. A pair of rubber blocks 69 is located between the side plates 67, 68 one on each side of the tube 66 and each of which is formed on one side with two grooves 76, 77 and on the other side with a single groove 78. Initially the grooves 77 engage the cable circuits but as each strap 64 reaches the pulleys 56, 57 the cables are led away from the grooves 77 and the grooves 76 pick up the parts of the cables running over pulleys 57. The driving pulleys 55 are driven from a motor 52 through reduction gearing 53 and a differential gear 54 may'be mounted between the two driving pulleys. If desired a plurality of driving units may be inserted in the conveyer run. The pulley arrangements and means for leading the cable circuits from the belt at the head and tail portions of the conveyer and the means for tensioning the belt and cables are generally similar to those described in Specifications 641,817 and 641,854. Specification 664,947 also is referred to.