| 摘要 |
<p>A lifting aid system for lifting and lowering units (1) such as containers portable buildings etc has upwardly extending guides (2) secured to the unit. Lifter devices (3) travel guided by the guides for connection to a chain or line of lifting gear, and a stop is positioned to stop the upward movement of the lifter devices and let the lifting gear take the weight of the unit. The unit (1) can be lifted from a lifting point at the top of the unit, but attachment to the lifting gear can be made at a point well below the top of the unit. The need to mount the unit or climb ladders is therefore avoided.</p> |
