| 摘要 |
A segmented rope guide formed of sectors encircles the drum of a hoist to guide a rope being wound onto or unwound from a helical rope groove on the drum and press the rope into the rope groove. The sectors have U-shaped interior portions facing inward toward the drum. A slot with inward converging side walls extends through one of the sectors to facilitate passage of the rope therethrough. A plurality of rollers are rotatably mounted in circumferentially spaced relation on axles transversely mounted in the U-shaped portions. The rollers include disc-shaped drum engaging elements that roll in the rope groove, and rope engaging elements having disc-shaped portions received in grooves between adjacent turns of rope with inwardly curved surfaces on each outer side of the disc-shaped portion that roll on the outer surfaces of the adjacent turns of rope. The sectors are spring biased radially inward toward the drum by a spring mechanism to urge the drum engaging elements into rolling engagement with the rope groove and the rope engaging elements into rolling engagement with the outer surfaces of adjacent turns of rope and grooves therebetween. Upon relative rotation between the drum and rope guide, the drum engaging elements and the rope engaging elements move the rope guide axially of the drum and maintain the slot aligned with the rope groove, and the rope engaging elements rolling on the outer surfaces of the turns of rope press the turns of rope into rope groove.
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