| 摘要 |
A wheelchair access ramp for a vehicle comprises a plate 20, a drive assembly 30 for moving the plate horizontally and guide members 24 for guiding the plate into a deployed position. Each guide means is attached to the rear of the plate and comprises of a pair of guide rollers (201, 202 Fig 6) which run along a channel (420 Fig 6) in a guide rail 42. When the plate is near full extension, the front roller (202) drops slightly with respect to the rear roller (201) and thus the front edge of the plate is lowered to the ground. Springs (51,52 Fig 3) are provided to ensure that the plate lowers smoothly and also to store energy to assist in the lifting of the plate. The drive assembly 30 comprises two drive arms 31,32 which cooperate with the plate and with each other. |
