| 摘要 |
PURPOSE: A lift system is provided to prevent the edges of a belt from receiving strong deformation when the belt is twisted. CONSTITUTION: A lift system comprises a lift cage, a roller structure, and at least one supporting and/or driving element. The roller structure has multiple rollers(10,20). The supporting and/or driving element has a belt(30) with a longitudinal axis line(32). The rollers have circumferential surfaces(13,23) with a recessed portion, an ascending portion, or the recessed portion and ascending portion. The belt is directly extended from a first roller to a second roller and has a belt main surface(33) with a recessed portion and an ascending portion complementarily formed in the recessed portion and the ascending portion of the circumferential surfaces of the rollers. The first roller can rotate on a first rotation axis line(12). The second roller can rotate on a second rotation axis line(22). The supporting element is twisted on the longitudinal axis line of the belt in a space between the two rollers. |
