Material or article handling – Self-loading or unloading vehicles – Having elevating load body
Patent
1992-08-03
1994-10-18
Huppert, Michael S.
Material or article handling
Self-loading or unloading vehicles
Having elevating load body
414459, 414460, 254 45, 280 4313, 280767, B60P 102, B60P 300, B66F 700, B62D 6112
Patent
active
053562577
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a carriage for picking up and moving containers.
It is often necessary to load and unload large numbers of containers, for example into ships from a quay and out of ships onto a quay, and from a quay onto a road or rail vehicle, or vice versa.
Such vehicles move the containers over desired distances, for example to and from places inland, where the contents of the container have to be unloaded from it and from where the container has to be returned empty or with another load.
The transfer of the containers from a storage place to a ship or vehicle and vice versa is normally carried out by cranes or with forklift trucks travelling along the floor of a storage park.
The so-called sea containers (ISO containers) commonly used at present have a so-called corner casting in each corner, which is a box-shaped casting with a slit-shaped opening in the bottom face and in the two upright external faces. The crane or forklift truck in this case generally has a lifting frame with non-circular locks which can engage in such openings in the top corners of the container and by turning about their axis can be locked therein, in order to ensure that the container can be safely lifted and deposited again in a desired place. For loading and unloading ships and for many other instances where large numbers of containers have to be moved in a storage park and loaded onto and unloaded from vehicles this is an adequate system which justifies the necessary capital investment for it.
Inland in particular, where smaller quantities of containers have to be loaded and unloaded per unit time, there are generally no such facilities, and it is economically unjustified to provide them. It is then necessary to resort to other means, such as ordinary cranes which are also suitable for other purposes, the container being lifted and lowered with slings round it, to lorries with means for removing the containers from them or pulling them onto them with a horizontal movement with movable hooks, cables or drawbars, possibly with a tipping body on the lorry etc.
The object of the invention is to provide a simple system to produce an efficient solution to this in many cases.
To this end a carriage of the type mentioned in the preamble is according to the invention characterized in that it has a frame having therein near one end a gripping means projecting laterally from it for gripping a container, such as a rotary lock with non-circular head, which can engage with a corner casting of a container, and having near said gripping means a bearing structure for a set of two wheels with horizontal transverse axis with a horizontal distance between them in the lengthwise direction of the carriage, on which bearing structure means act in order to move the wheels up and down in opposite directions to each other, and in order to hold them in position as to their height with one wheel higher than the other, all this in such a way that the carriage together with a similar carriage at the other side of a container can grip the latter and can lift it over a short distance by moving one of the wheels of each set downwards so that it can be shifted in the lengthwise direction of the carriage.
It is thus possible to move such carriages to opposite sides of a container, to make the gripping means grip it and thus be locked therewith, to lift the container through height alteration of part of the wheels relative to the frame of those carriages, and to shift the container with the carriages, while the two wheels of a set which can be moved mutually in height direction of the frame can be operated during travelling over transitions between, for example, a loading platform and a loading face of a vehicle, in such a way that the container can be moved smoothly from one plane to the other, even if there are horizontal clearances and height differences between these planes.
Said gripping means preferably engage in the bottom corner castings of the containers, which means that the carriages can be low, simple and light. Since the carriages are mobi
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Gordon Stephen
Huppert Michael S.
N.C.H. Hydraulische Systemen B.V.
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