| 摘要 |
A carriage with a front end and a rear end can be stowed in a truck box or truck platform, and deployed to a position on the ground outside of the truc k by providing a transfer arm having one end pivoted to the truck and the other e nd pivoted to the front end of the carriage. Roller guides are mounted on the truck, and the carriage has tracks which run in the roller guides for at least a portion of its movement between the two positions. The carriage has wheels adjacent the rea r end, and a powered mechanism, typically hydraulic, is adapted to move the transfer arm between its two extreme positions. As the transfer arm begins to move aw ay from the position in which the carriage is stowed in the truck, the front en d of the carriage lifts upwardly while the carriage moves rearwardly, supported and guided by the roller guide means, until the wheels at the rear end of the carriage contact the surface on which the truck is standing. This causes the carriage to disengag e from the roller guide means and eventually the carriage comes to a stop resting o n the surface.
|
