Material or article handling – Self-loading or unloading vehicles – With load-receiving portion – or significant section thereof,...
Patent
1996-07-03
1998-09-15
Bucci, David A.
Material or article handling
Self-loading or unloading vehicles
With load-receiving portion, or significant section thereof,...
2804145, 280767, B60P 164, B62D 6112
Patent
active
058070575
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a transport vehicle for taking up and taking down containers and such loads onto or from a loading platform thereof, having means on the vehicle for engaging such a container or the like at one end and moving the latter with respect to the loading platform when taking up and taking down, the loading platform being mounted on the fixed chassis of the vehicle, the vehicle having wheels on one or more wheel axles near the take-up or take-off end, incorporated in a carrier which, with respect to the fixed chassis of the vehicle and the loading platform, is slidable with said axles between a position where at least one wheel axle is close to said take-up and take-off end, and a position where said wheel axle is at a considerable distance from said end, which carrier, in a vertical plane, adopts a fixed angular position with respect to the carrier, and the vehicle being constructed in such a way that in said latter position of said carrier the loading platform at the take-up or take-off end is able to tilt towards the ground.
2. Description of the Related Art
Such a vehicle is disclosed by NL-A-88.01783 and by U.S Pat. No. 4,026,429. Such vehicles are especially intended and suitable for taking up and setting down long containers, for example so-called forty-feet ISO-containers.
The means for engaging such loads at one end may take many different forms, inter alia as specified in EP-A-151.635 and EP-A-517.824. These make it possible to engage one end of the container to be taken up, after which said end can thereby be placed onto the loading platform and the container, by these means being moved across the loading platform, can be moved onto said loading platform entirely. In practice this is usually effected by driving the vehicle backwards, so that the container remains in its position in a horizontal sense while being taken up.
Such vehicles present problems, especially in the case of heavily laden containers, since the displaceable carrier with wheel axles reaches a slanting position, together with the loading platform, when containers are being taken up and taken off, in many cases even to such an extent that the wheels which are furthest away from the take-up or take-off end are entirely unloaded and are even lifted off the ground, and the wheels which are nearest to that end, together with their axle, suspension and spring system are temporarily loaded very heavily. Moreover, it is difficult, in the case of such long containers, to drive the vehicle backwards exactly in the direction of the container over the distance to be covered, which is fairly large in this instance, so that the container may end up on the loading platform in a skewed position, with all the attendant drawbacks. When containers are set down, it is likewise often important for the correct set-down direction to be maintained, for example when the container is to be connected to a warehouse or store or when the container, having been set down, is used for all sorts of purposes, such as retail sales premises and the like.
SUMMARY OF THE INVENTION
The object of the invention is to improve such a transport vehicle in such a way that one or more of these problems are reduced.
To this end, a vehicle as mentioned in the preamble is characterized, according to the invention, in the first instance by there being disposed on the slidable carrier one or more auxiliary rollers or wheels which have means for moving them up and down, so that they are lifted up when the vehicle is driven on the road, and for forcing them against the ground with some force when a container or the like is being taken up, so that over short distances and at low speed they absorb part of the weight of the vehicle.
By choosing the location of said auxiliary rollers or wheels near the hindmost wheel axle, precisely in the vertical plane through or behind the latter, it is possible to relieve the load on this axle optimally during said taking up or taking down, while, in the lifted position, t
REFERENCES:
patent: 3454175 (1969-07-01), Kellaway
patent: 4063745 (1977-12-01), Olson
patent: 4274656 (1981-06-01), Warren
patent: 4605086 (1986-08-01), Marom
patent: 4824133 (1989-04-01), Wilson
patent: 5009567 (1991-04-01), Fenton
patent: 5173028 (1992-12-01), Heikkinen et al.
patent: 5263807 (1993-11-01), Pijanowski
Bucci David A.
N.C.H. Hydraulische Systemen B.V.
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