Conveyors: power-driven – Conveying apparatus entirely supported by mobile ground... – Conveyor shiftably mounted on vehicle
Patent
1997-09-16
1999-05-18
Kashnikow, Andres
Conveyors: power-driven
Conveying apparatus entirely supported by mobile ground...
Conveyor shiftably mounted on vehicle
1988613, 239672, B65G21/10
Patent
active
059042354
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a spreader for a plant for continuously depositing conveyable material, whose substructure rests on three support points and which comprises a discharge jib.
BACKGROUND OF THE INVENTION
The known material spreaders of the aforesaid type rest on three support points consisting of crawler undercarriages. By means of these crawler undercarriages a spreader can be moved around. Crawler undercarriages are very expensive components. They are also very heavy and, as a result the known spreaders have a considerable weight. In the known spreaders the discharge jib is swingably mounted. The discharge level is relatively high.
OBJECT OF THE INVENTION
It is the object of the invention provide a material spreader which is considerably lighter and substantially more cost-effective than the above described known spreaders.
SUMMARY OF THE INVENTION
This object is attained with a materials spreader of the aforesaid type in which the ground, mobility of the spreader,
The transport vehicle is able to position itself underneath any selected point under the substructure of the spreader, in order to lift and move the spreader. Because the spreader will usually remain at its selected location for a longer period of time, the transport vehicle may be employed elsewhere during that period, for example as a lifting, traction or relocation apparatus. If two or more spreaders are operated simultaneously, a single transport vehicle will be sufficient for all these spreaders.
The elimination of the plurality of crawler undercarriages results not only in a considerable weight reduction of the spreader of the invention, but also in an appreciable cost saving. A further cost advantage results from the alternative uses of the transport vehicle while the spreader is stationary and from the use of a single transport vehicle for two or more spreaders.
The spreader design according to the plurality of invention, as well as the elimination of the crawler undercarriages, translates into reduced construction height of the substructure of the spreader, which in turn leads to weight reduction.
In a preferred embodiment of the spreader according to the invention, essentially of a long transverse beam and a short transverse beam, these being interconnected by two spaced apart longitudinal beams together with the transverse beams form a trapezoid.
As a result, the substructure of the spreader has adequate stability and the two longitudinal beams, which may take the form of box beams, provide secure support for the substructure on the transport vehicle.
Advantageously one pontoon is provided is fitted under each end of the long transverse beam and a single pontoon is provided under the short transverse beam. The size of the pontoons depends on the respective acceptable ground load.
In a further development of the invention a feed belt is provided between the two longitudinal beams of the substructure for conveying the supplied material to the conveyor belt of the discharge jib. This is made possible by the spacing of the two longitudinal beams. It is also possible to provide a continuous conveyor belt instead of the feed belt and the conveyor belt of the discharge jib which results in a simplified construction.
In a further development of the invention the conveyor belt of the discharge jib has a lesser width and revolves at a higher speed than the feed belt provided between the longitudinal beams of the substructure. This leads to a further weight reduction.
A further cost saving of the spreader of the invention is due to the fact that the discharge jib is nonrotationally mounted to the substructure. In order to turn the discharge jib, the spreader is lifted by means of the transport vehicle, whereafter the discharge jib is turned to the desired position together with the entire spreader.
In order to avoid difficulties when moving the spreader, the discharge jib is designed to be raised and lowered according to a further feature of the invention, a hydraulic cylinder is provided for raising and lowering the discharge
REFERENCES:
patent: 2362677 (1944-11-01), Stephens
patent: 4245732 (1981-01-01), Couperus
Kolleth Horst
Van De Locht Jurgen
Dubno Herbert
Kashnikow Andres
Krupp Fordertechnik GmbH
O'Hanlon Sean P.
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