GB759621A - Improvements in and relating to roller guide arrangements for hoists, particularly for haulage skips and cages used in shaft haulage in mines - Google Patents

Abstract

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; 4<SP>1</SP>, 5<SP>1</SP> are yoked together in pairs by mounts 3, 3<SP>1</SP> which are provided with double spring arrangements 7, 7<SP>1</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.