Material or article handling – Self-loading or unloading vehicles – Loading or unloading by other carrier or mover means – and...
Patent
1980-12-12
1983-06-28
Sheridan, Robert G.
Material or article handling
Self-loading or unloading vehicles
Loading or unloading by other carrier or mover means, and...
180326, 280 4323, 280 4324, B60P 150
Patent
active
043903142
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a so-called container truck for lifting up a container (or other unit load) into position on the truck for subsequent transport.
PRIOR ART
Previously known container trucks are equipped with at least two axles provided with wheels, a lifting device of a suitable kind and a platform or the like for the container.
During loading, the container truck is driven as close as possible to the container and a lifting beam or the like on the lifting device of the truck is fixed to the container which is then lifted up and in to the container platform.
Since some portion of the truck generally projects forwards the distance between the supporting point of the truck on the ground nearest to the container (the ground contact of the nearest wheel, that is to say the tipping centre of the truck) and the centre of gravity of the container is normally the wheel radius plus the length of the projecting portion of the truck plus half the width of the container.
In order to render possible the lifting of heavy containers (weight for example 30 tons), the truck must be provided with a considerable counterweight (for example 20 tons), which, with the truck's own weight (for example 20 tons) not only produces a heavy truck (total 40 tons) with the consequent unnecessarily high price but also the need for a much stronger construction, which also increases the price of the truck unnecessarily. The great weight means that the volume of the truck is increased and that its manoeuvrability is reduced, inter alia because there is a heavy demand on the carrying capacity of the chassis.
THE INVENTION
The distance between said supporting point of the truck on the ground (tipping centre) and the centre of gravity of the container can be reduced to half the container width and the need for counterweights on the truck can be eliminated if, according to the invention, an end portion of the truck adjacent to the container is brought to bear against the support for the truck during the lifting of the container to the transport position on the truck, in that between the axle for the wheels of the truck nearest to the container and the truck there are members, preferably fluid pressure actuated members, for lowering and raising the truck in relation to the axle.
Going back to the above example of a container weight of 30 tons, the weight of the truck hereby can be reduced to half from 40 tons to 20 tons. It is easy for the expert to see what advantages this leads to in the form of simpler contruction, lower price and improved utility.
Only a so-called container truck has been mentioned above but the invention can also be used with other vehicles for the lifting and transport of so-called unit loads or corresponding loads. One example of such a vehicle is a combination of a towing vehicle and a lifting apparatus articulately fixed thereto, when the lifting apparatus is adapted according to the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be described in more detail below with reference to the accompanying drawings in which
FIGS. 1 and 2 show a container truck according to the invention in a side view in the loading and unloading position and the transport position respectively, and
FIG. 3 shows another vehicle according to the invention in a side view.
DESCRIPTION OF PREFERRED EMBODIMENTS
A preferred container truck according to the invention is shown in different working positions in FIGS. 1 and 2; for the sake of clarity, the reference numerals only appear in FIG. 1 (with one exception).
The container truck, which bears the reference numeral 1, has two axles of which one--the left-hand one in FIG. 1--has driving wheels 2 and is mounted on a drive motor housing 3. This housing is pivotable about its axle 4 together with the whole operating place in a cabin 5 for a driver 6, as can be seen from a comparison between FIGS. 1 and 2. In FIG. 1, the drive motor housing 3 and the operating place for the driver 6 are turned into the position for loading and unloading and in
REFERENCES:
patent: 3048284 (1962-08-01), Cissna
patent: 3240008 (1966-03-01), McMullen
patent: 3528675 (1970-09-01), Brown
Brown Laurence R.
Dynatrans AB
Sheridan Robert G.
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