| 摘要 |
PCT No. PCT/SE95/00480 Sec. 371 Date Oct. 31, 1996 Sec. 102(e) Date Oct. 31, 1996 PCT Filed May 1, 1995 PCT Pub. No. WO95/29867 PCT Pub. Date Nov. 9, 1995A tandem driving device (1) of a stair lift to bring the stair lift (10, 11) along a guiding system (2, 3), consists of an upper calibrated guiding rail (2) and a lower guiding rail (3), enabling the stair lift to pass sharp corners during inclination of the lift. Two driving roller units (M1, M2) with on pair of rollers (4, 6; 5, 7) in each, are interconnected by a broken hinge (8a, 8b), the longitudinal axis of which intersects the longitudinal axis of the guiding system. The contacting surfaces of at least the driving roller (rollers) (4; 5) engage the upper rail (2) and have a friction-increasing resilient layer. The rollers are biased toward the upper guiding rail (2) by a spring. |
