| 摘要 |
<p>An elevator (1) having a frame (2), a fixed straight guide (9) fitted to the frame (2), a platform (12) movable along the guide (9), and an actuating device (13) for moving the platform (12); the actuating device (13) having an electric motor (22) and a cable transmission (14), the cables (15) of which have respective end portions connected integrally to the platform (12) and to the frame (2), and extend about transmission pulleys (17) carried by a counterweight (18) movable parallel to the guide (9) by a screw-nut screw assembly (19) activated by the electric motor (22). <IMAGE></p> |
