| 摘要 |
<p>The lifting board (18) fitted to a vehicle closes the rear platform (10) or acts as a lifting support. It can be moved between ground and platform level by fixed and hinged extendable arms (13, 19). The extendable arm is pivoted to the board and the platform (A, B). A ram (21) provides the power and a stop holds the pivoted arm. When the arm retracts to a given length the board tilts, due to the geometry of the system. The pivoting arm is lengthened below the pivot to form a support (16).</p> |
