| 摘要 |
<p>Two separate sling lines (13, 14) have inner end portions secured to a drum (6 or 6') mounted in a block (2 or 2') and are wound in opposite senses around the drum. The block is adapted to be connected to a hoist and the free end portions (15) of the sling lines are adapted to be connected to a load at spaced locations. During of after lifting the load by use of the hoist, the drum can be rotated to haul in one sling line while automatically paying out the other and thereby tilt the load. Mechanism (10, 12 or 8', 30, 35) is provided for locking and unlocking the drum relative to the block.</p> |
