| 摘要 |
A foldable ramp structure is disclosed arranged to be mounted on a pick-up truck and to be used for servicing aircraft or the like purposes wherein the ramp is to provide a stairway to an elevated point. The invention provides a first stair assembly and an intermediate platform. Both are fixedly secured to the box of the truck. A second stair assembly extends forward and horizontally away from the platform, at a level just above the top of the cab of the pick-up truck. In an extended state, it is only the second stair section which is raised by pivoting same about a transverse axis located near the rear end of the cab. m e free end of the second stair assembly is provided with a horizontal, second platform. Two separate rails are provided, one for the second platform and the other for the second stair assembly itself. The railing is foldable such that, in a folded state, it clears the intermediate platform and also does not extend beyond the forwardmost end of the second platform. The device is of a very simple structure and thus inexpensive to produce. It is especially adapted for convenient securement to an existing pick-up truck or the like, to avoid the high cost of a specialized vehicle for the purpose. |
