Improvements in and relating to roller guide arrangements for hoists, particularly for haulage skips and cages used in shaft haulage in mines

摘要

759,621. Guiding arrangements for mine cages and skips; end stop gear. GUTEHOFFNUNGSHUTTE STERKRADE AKT.-GES. Oct. 12, 1953 [Oct. 10, 1952], No. 27957/53. Classes 78 (3) and 78 (5). Guide means for a cage or skip comprises rollers urged into engagement with three sides of a guide rail by relatively weak springs and provided with further stronger springs which absorb any major shocks acting on the rollers. A roller 2 (Figs. 2 and 4) is journalled at 17 in a mounting 6 which is pivoted at 16 to a plate 161 secured to the cage 1. This roller is urged into contact with guide 9 by a spring 11 which is surrounded by a stronger shock-absorbing spring 10. The side plates of mounting 6 may be extended beyond the periphery of roller 2 to form overwind limiting stips which co-operate with thickened end portions of the guides. The rollers 4, 5; 4SP1/SP, 5SP1/SP are yoked together in pairs by mounts 3, 3SP1/SP which are provided with double spring arrangements 7, 7SP1/SP. In a modification (Fig. 7) the roller 4 is mounted on a rotatable eccentric carrier 23 threaded on a non-rotatable shaft 24 which is urged away from a casing 67 by a double spring assembly 70, 71; the arrangement being such that spring 71 exerts a torque on the carrier which thereby urges roller 4 into contact with the guide, whilst large irregularities in the guide produce a large reverse torque on the carrier which is transmitted through the threads on shaft 24 to the shock-absorbing spring 70. In the modification shown in Fig. 5, rollers engaging opposite sides of the guide 9 are slidably mounted on a carrier 41, secured to the cage, and are urged together by a spring 31 which is surrounded by the stronger shock-absorbing spring 30. In all the above arrangements the rollers are each provided with a rubber bush 19 and a steel tyre 20, but in a modification (not shown) they are provided with pneumatic tyres. In another modification (not shown) the springs may comprise a series of rubber plates. In a further modification (also not shown), each roller is replaced by a pair of rollers on a common axle.