| 摘要 |
A boarding ramp guided and moved by four boarding guide masts is suspended by four restiform bodies. The restiform bodies are separately installed, winded and spanned on the top portion of the boarding guide masts, on upper bodies of revolution performing vertical motions, and on the bottom portion of the boarding guide masts, on lower bodies driven by a driving device for boarding. Among the four lower bodies of revolution arranged toward the exiting direction of article supports, at least one connecting body is installed to link at least one side of the lower bodies. |
