| 摘要 |
A ladder ramp designed for the rapid lowering of a ladder lying on the ramp (5) in ready position is shown. The ramp (5) comprises a swing frame (4) pivotably connected to a support or a base (2), at least one damper means (3) for the swinging movement operative between the base (2) and the swing frame (4), a slide frame (1) lying in the swing frame (4) and capable of sliding along said swing frame (4), at least one damper means (7) for the sliding movement operative between the slide frame (1) and the swing frame (4), a releasable locking device (15) which holds the slide frame (1) in a position of readiness at the starting position, which slide frame (1) forms an angle of inclination ( alpha ) with the base (2) and stands in a gravity-actuable state of readiness and, after the release of the locking device, following a predetermined sliding movement, undergoes a tipping/pivotal movement. The tipping movement stops at a predetermined angle corresponding to a certain height above ground for the lower end of the ladder where this end of the ladder may be grasped by personnel at hand level. The slide frame includes elongate, continuous guide means for engagement with guide means on the upper end of the ladder, as said personnel who have grasped the lower end of the ladder begin to transport the ladder away from the slide frame while the upper end is moved downward along the slide frame in the guide means until the upper end is at hand level to be grasped and transported away by additional personnel. |
