| 摘要 |
This invention relates to a material handling apparatus, commonly known as a slewing bridge shiploader or linear shiploader, having front and rear pivotal supports and a movable boom traversing the bridge. The front end support of the bridge is movable along a front linear track extending parallel to the ship and the rear support is movable along a rear linear track extending in a direction perpendicular to the front linear track. The bridge contains a conveyor running along its length and also running on the boom, which conveyor is fed from the rear end of the bridge. The conveyor slopes upward from its feed point at the rear of the bridge to the height of the boom, thereby permitting a reduction in bridge span. As the front end of the bridge moves along the front track, ?e rear end and its support move longitu ?lly along the rear track, while simultaneously the rear end of the bridge pivots relative to the rear support. The conveyor feed point is oriented over the rear end pivot point. A movable trestle carrying a second conveyor is linked to the rear end of the bridge for concomitant movement therewith. The terminating end of the second conveyor is oriented above the feed point of the bridge-mounted conveyor. As the rear end of the bridge pivots and moves longitudinally, the trestle moves with it, thereby ensuring continuous feeding of the bridge-mounted conveyor during movement of the bridge.
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