| 摘要 |
<p>An unloader (1) is provided, particularly for unloading material from the hold of a ship (2), which has a horizontal screw type excavating conveyor, a rake type conveyor (26) connected to the screw conveyor (27), and a vertical elevator (19) receiving material from the rake type conveyor (26) and elevating it for discharge on to a ship-to-shore conveyor (17). The elevator (19), and therewith the screw and rake type conveyors (27,26), can be moved horizontally and vertically on a boom (11) and also rotated about its vertical axis. Rotary cutter blades (73,74) are provided at both ends of the screw type conveyor (27); and the rake type conveyor (26) has its attitude controlled by resilient holding means to keep it at a substantially constant angle with respect to the axis of the elevator (19). Optionally, the elevator (19) can be articulated at two points up its height so that its lower part can be shifted laterally with respect to its upper part, while the lower part is maintained parallel to itself, by an arrangement of hydraulic jacks.</p> |
