| 摘要 |
<p>A dock leveler (F) is provided having an automatically actuated barrier (20) for preventing accidental runoff of material handling equipment from a loading dock (14). The leveler (I) includes a ramp (14) pivotally mounted on the loading dock (10) for selected movement from a stored position wherein the exposed upper surface (14) of the ramp is level with the platform surface of the dock. A lip (20) is hingedly connected to the front edge portion of the ramp (14) and when in a depending first position supports the ramp in the stored position. When in the first position, a portion of the lip (20) protrudes above the plane of the ramp upper surface (14) and forms a vehicle barrier. Upon the ramp being actuated from the stored position to a raised position, the lip (20) automatically slides (22) relative to the ramp to a depending second position whereby no portion of the lip (20) forms a protruding vehicle barrier. The lip (20) is adapted to assume a cantilevered third position, when the ramp is in the raised position, thereby forming an extension of the ramp (14) and spanning a gap formed between the front edge (14b) of the ramp and the rear end of the bed of a vehicle parked at the dock (I). When in the third position, no portion of the lip (20) forms a protruding vehicle barrier.</p> |
