| 摘要 |
<p>A device (1) for lifting a load (2) from a lower level to a highet level consisting of a support structure (4) and at least one rotary lifting arm (5), and comprising a means (6) of joining this rotary arm (5) to the load (2) such that remains vertical throughout the lifting operation, also comprising at least one bar extending longitudinally (7), hinged at one end (7a) on the free end (5a) of the lifting arm (5) and fixed, in such a way that it can be removed, to the support structure (4), this bar (7) and the arm (5) having elements (10, 11) which are opposite when the load (2) is on the roof (3) and the bar (7) is fixed to the support structure (4), this locking the load (2) in position and preventing its removal.</p> |
