| 摘要 |
1,269,346. Endless conveyers. J. S. BILDSOE. 12 Aug., 1969 [12 Aug., 1968], No. 40361/69. Heading B8A. A conveyer comprises a plurality of frame members 82; pivot 114 for pivotally connecting the frame members to one another in series; a plurality of load carrying pallets 12 each having a load carrying surface, a convex leading edge and a concave trailing edge, the pallets being secured to the frame members with their load carrying surfaces being closely adjacent one another to provide a substantially smooth and continuous overall load carrying surface for the entire length of the series of interconnected frame members 82; means for guiding and supporting the frame members and pallets for movement along a predetermined path; driven means supported by the frame members and including a vertically disposed frictional surface 170 disposed beneath the pallet load carrying surface and extending along the path; and powered driving means 210 frictionally engageable with the frictional surface to move the frame members 82 and pallets 12 along the predetermined path. The surface 170 may be flexible e.g. of rubber, or may be rigid e.g. if brake-lining material. It is formed by a series of separate elements 170 each secured to a respective frame member 82. The elements 170 are engaged by a series of drive assemblies 16. Each of these comprises an endless driving belt 210 which is driven by a motor 190 and is urged into engagement with the elements 170 by a group of three rollers 228 and associated rollers 242. These are loaded by springs 272. The pallets 12 are guided by the action of a wheel 116 mounted on each pivot 114 of the frame members 82, which is constrained by longitudinally-extending guide surfaces 66, 68. The pivot 114 also provides for a hinge joint between successive frame members 82. Each pallet may be of plywood or stainless steel, and has a non-slip load engaging surface of vinyl plastics, aluminium, or stainless steel. Each pallet is supported by castors 136 and 136, and by bolts 106, 106, which are carried by laterally extending arms 86, 88, of each frame member 82. In addition, a plate 150 (Figs. 3 and 4) is secured by screws 152, 152 (Fig. 3), to a forward upper surface of each member 82. This plate 150 engages in an arcuate channel 158 extending around the convex forward periphery of each pallet 12. In a modification (Figs. 6-9, not shown), intended for operating on inclined conveying paths, each pallet is formed of two portions hinged together about a transversely disposed horizontal axis. The pivotal joints between the frames 82 are arranged to have a degree of universal movement. The guide wheels 116 are peripherally grooved. |
