| 摘要 |
<p>Lifting tackle is provided in the form of a shackle (14) having a guide wheel (16) over which a length of lifting chain (12) is passed, the ends (18, 20) of which are for attachment to the load (10). The shackle (14), when the chain (12) is not under load can be moved relative to the chain (12) until the shackle (14) is in the desired position over the load (10), when the shackle (14) is lifted and the chain (12) tensioned, the guide wheel (16) is locked from rotation preventing the chain (12) from running through the shackle (14) and tilting of the load. The shackle (14) has a restrictor means (80) which exercises a braking effect on the guide wheel (16) when the chain (12) is disconnected from the load (10) to prevent the chain (12) from feeding freely under gravity through the shackle (14).</p> |
