US H2178 H1
Containers are transported by movement of upper and lower trolleys along vertically spaced travel paths established by laterally spaced rails formed in a boom supported in a horizontal position by suspension cables attached to a frame assembly through which the boom extends horizontally between container receiving and delivery locations.
1. In a load handling crane for transport of containers between receiving and delivery locations, the improvement residing in: at least two non-pivotal trolleys onto which the containers are positioned; rail means for guiding simultaneous movement of the trolleys between said locations passing each other vertically spaced travel paths to effect said transport of the containers; and wheeled frame means for support of the rail means.
2. The load handling crane as defined in
3. The load handling crane as defined in
4. The load handling crane as defined in
5. The load handling crane as defined in
The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefore.
The present invention relates to guided transport of containers between adjacent locations, such as land-based trucks and dockside moored sea vessels.
Current methods and apparatus for transport of containers between ships at port and land-based dockside locations involve use of typical marine terminal cranes having a single rail guided trolleys on a boom extending between such container receiving and delivery locations. Such container transport cranes have facilities involving factors which limit transport rapidity and efficiency with respect to containers. It is therefore an important object of the present invention to provide for more efficient container crane loading and unloading of sea vessels to avoid port traffic delays.
Pursuant to the present invention, containers are loaded onto and removed from two trolleys of a single crane to double the rate of container transfer. Such trolleys are respectively guided along upper and lower travel paths vertically spaced from each other along a horizontal crane boom suspended by cables anchored to the upper end of the crane support frame that is positioned by motorized wheel assemblies between container receiving and delivery locations on a land-based surface. Each of such travel paths is established by a pair of rails laterally spaced from each other on the boom positioned so as to extend between the container receiving and delivery locations, at which such as a land-based truck vehicle and a dockside shipping sea vessel are positioned. The vertical spacing between travel paths and the lateral spacing between the boom rails accommodate handling of many containers to be loaded and unloaded without obstruction or delay in transport.
A more complete appreciation of the invention and many of its attendant advantages will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawing wherein:
Referring now to the drawing in detail,
The crane 10 is moved to a position on a land-based surface as shown in
The rails 22 of the boom 14 as shown in
Pivotally suspended from a cross-bar portion 52 of the upper trolley 46 between its side portion 54 on which the wheels 44 are mounted as shown in
It will be apparent from the foregoing description that the lateral spacing between the boom rails 22 and corresponding dimensions of the trolleys 46 and 50 at different vertically spaced levels enables transport of all containers without obstruction, as well as to accommodate separate upper and lower rail shuttling movement of the trolleys 46 and 50 at the same time with containers thereon. Such shuttling movement of the upper trolley 46 with the container 64 thereon occurs on the rails 22 along the boom 14 as viewed in
Thus, both the trolleys 46 and 50 may be utilized with maximum efficiency during a plurality of operational cycles for load transfer in opposite directions along the boom 14. Accordingly, one of trolley 46 and 50 may be receiving a loaded container on its spreader 56 or 62 at one end of the boom 14 from the vehicles 36 as shown in
Obviously, other modifications and variations of the present invention may be possible in light of the foregoing teachings. It is therefore to be understood that within the scope of the appended claims the invention may be practiced; otherwise than as specifically described