| 摘要 |
<p>Scissor-type lifter comprising a base (2), a platform (3) movable with respect to said base and a plurality of pairs of scissor-like arms (7,8,10,11), each arm of each couple being hinged at the intermediate position with respect to its longitudinal development to the other arm forming said couple, said plurality of arms including at least one couple of upper arms (10,11) and one couple of lower arms (7,8), one couple of which being hinged on one side in a not-sliding way to said base and on the other side in a sliding way to said base and the other couple being hinged on one side in a not-sliding way to said platform and on the other side in a sliding way to said platform and comprising at least one intermediate frame (5) with respect to said base (2) and to said platform (3), said intermediate frame (5) including hinging means (20) not sliding with respect to the frame itself for said couple of lower arms (6) with respect to said intermediate frame (5), hinging means (21) not sliding with respect to the frame itself for said couple of upper arms (9) with respect to said intermediate frame (5), slideable means (17) with respect to the frame itself, said slideable means (17) comprising hinging means (19) for said couple of upper arms (9) with respect to said intermediate frame (5) and hinging means (18) for said couple of lower arms (6) with respect to said intermediate frame, said plurality of arms being arranged on each side of said base, and the lifting system being of the electro-mechanical type with rigid chains (23).</p> |
