| 摘要 |
A lifting platform for the handicapped for a transit system utilizes a pair of side support members mounted on a fixed base support at ground level in which the platform is located between the side supports and raised and lowered by a set of rotating actuating arms interconnected by a chain drive and sprocket wheel combination. A sprocket wheel and idler shaft combination interconnect the rotary actuating arms associated with each side support member and maintain the support platform at all times in a horizontal position while being raised and lowered. The rotating actuating arms rotate about an axis above ground level and intermediate between the high and low position of the platform. Final height adjustment is determined by the amount of rotation beyond the vertical by the rotating actuating arms.
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