Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1991-12-11
1993-04-06
Olszewski, Robert P.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
414281, 105165, B66B 920
Patent
active
051995310
DESCRIPTION:
BRIEF SUMMARY
FIELD AND BACKGROUND OF THE INVENTION
The invention relates to a rail-mounted high-lift stacking vehicle comprising a travelling mechanism with at least two travelling mechanism bodies. Each body has at least one travelling roller each and an upper guide mechanism with a front and a rear guide arrangement. At least one lift mast is provided between the travelling mechanism and the guide mechanism, on which is supported a vertically displaceable lift carriage.
A vehicle of this type is known, for example, from European Patent 148 913.
Such vehicles are guided on rails in the aisles between storage shelves. So that a vehicle is in to an position to enter from one aisle the adjacent aisle, it is necessary that the rail distance be significantly greater than the wheel distance or the distance of the centers of rotation of the travelling mechanism. The width of the aisles, however, should be kept as small as possible so that as little storage space as possible is lost. The above stated prerequisite is achieved by insuring that the travelling mechanism and the guide mechanism of the vehicle are kept as short as possible. Moreover, in many cases the driving rails are positioned asymmetrically with respect to the shelf aisle distance. If this is done, however, it is not longer possible to place a rail arrangement in the center of the shelf aisle and thus no longer possible to install; a branching shunt which turns either to the right or the left.
In many cases vehicles suitable for relatively large loads cannot be used in the presence of narrow or closely adjacent storage aisles due to their long wheel distance.
SUMMARY OF THE INVENTION
It is the task of the present invention to improve a rail-mounted vehicle of the type stated in the introduction, to the extent that an especially strong apparatus suitable for transporting large loads can also be used even in cases of short distances of the parallel rails.
This is achieved according to the invention in that the travelling mechanism and the guide mechanism are provided with at least one articulation which permits bending in a horizontal plane and in that the traveling mechanism has at least two lift masts which are connected through the travelling mechanism and the guide mechanism.
Furthermore, it is advantageously provided that on each lift mast a lift carriage is drivably disposed and that the two lift carriages are drivable independently of each other.
In the case of an advantageous embodiment of the invention, the travelling mechanism has four lift masts which, together with the travelling mechanism and the guide mechanism, form two closed frames which are connected in an articulated manner through the travelling mechanism and guide mechanism sections.
Again, an advantageous embodiment of the invention provides that, in each frame, one lift carriage serving only for transporting loads travels and between the two frames a platform or the like is positioned which is, stationary in the vertical direction and provided for an operator.
Advantageously, lateral guide rollers are used at the articulations so that less lateral pressures is generated.
In a further advantageous embodiment travelling rollers are used in the articulation or articulations of the travelling mechanism, leading to a decrease of rolling pressure. This yields significant savings at the production of the drive rails and also permits use of quiet rollers of synthetic material.
Since insulating pieces are necessary when placing power leads in the upper guide rail at the shunts, it can happen that conventional shelf-stacking devices become current-less. It is therefore in many cases required to provide further complicated current conductors.
In a further preferred embodiment of the invention it is therefore provided that at at least one articulation of the guide mechanism a current collector is provided.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following, different embodiments of the invention will be described in further detail, in conjunction with the Figures of the enclosed drawings, wherei
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patent: 553268 (1896-01-01), Skou
patent: 1826853 (1931-10-01), Williams et al.
patent: 2071207 (1937-02-01), Knecht
patent: 4010855 (1977-03-01), Smith
patent: 4331418 (1982-05-01), Klebe
Lagertechnik Gesellschaft m.b.H.
Noland Kenneth
Olszewski Robert P.
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