Material or article handling – Self-loading or unloading vehicles – Conveyor
Patent
1990-04-27
1992-11-17
Spar, Robert J.
Material or article handling
Self-loading or unloading vehicles
Conveyor
414527, 414510, 2441371, B64C 122
Patent
active
051638010
DESCRIPTION:
BRIEF SUMMARY
AREA OF INVENTION
The present invention relates to a loading device especially intended for loading and unloading of goods in an air-plane such as of the type DC-9.
PRIOR ART
The loading and unloading of goods in an air-plane today has several problems. It is difficult to mechanize the loading and today the loading and unloading takes place manually to a great extent, which means great costs.
Futhermore, the working conditions are often severe for the loading personnel, which leads to the risk of working injuries and a great renewal of personnel.
The loading of goods in an air-plane is a procedure which is sensitive for the air-company, since a wrong handling means that a suitcase will follow the wrong air-plane with resulting complaints. Moreover, damages of suitcases will easily take place.
Thus, there is a desire to be able to mechanize the loading procedure as far as possible so that the working conditions for the personnel can be improved and the risk of wrong handling being minimized. The large air-companies perform an intensive research for finding a loading system which makes possible the mechanizing of the loading and unloading of goods in an air-plane.
In the international patent applications published under Nos. W087/03857 and W087/06909 there are shown a loading device for an air-plane of the above-mentioned type. However, there are certain improvements still to be made in the devices disclosed in said publications until an operating loading device can be constructed.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a loading device that makes possible the mechanizing of the loading and unloading of goods in e.g. an air-plane. The device can also be used at other occasions where goods are moved, such as in a railway wagon, a ship and even in a storage for handling goods in the storage.
The object of the present invention is also to provide a loading device which makes possible a convenient loading and unloading of goods in shallow spaces, such as long, narrow and shallow spaces in an air-plane, whereby the loading can take place from the opening in a convenient working position.
Another object of the invention is to provide a loading device, which is specially adapted for the demands which prevails in an air-plane, i.e. is extremely light, tolerant and reliable.
Thus, there is provided a loading device for e.g. an air-plane for loading and unloading a loading space, comprising a framework having longitudinal profile strips and a front and a back foil, between which a slide cloth is adapted. Moreover, there is a partition limiting the loading space and a transport cloth. One end of the transport cloth is connected to the partition and extends forwards above the slide cloth to the front end of the loading space and over a breaking edge and backwards below the slide cloth. The other end of the transport cloth is connected to several pull bands extending further backwards to the inner end of the loading space below the slide cloth and thence forward above the slide cloth and to the other side of the partition where they are connected to the partition.
According to the invention there are at least two longitudinal drive screws and corresponding nuts for driving the partition and the transport cloth and the pull bands from the outer end of the space to the inner end of the space and vice versa for loading and unloading of goods in the loading space.
Preferably, the screw is made of a complex construction of an aluminium tube with outer windings and a coal-fibre rod attached by glue in the interior of the aluminium tube Preferably, the screw is anchored in the longitudinal direction by sleeves in each end, said sleeves having both axial needle bearings and radial roller bearings.
According to a further preferred embodiment, the screw is anchored in positions between the ends for prevented uncontrolled deflections of the screw at rotation, especially at high rotation speeds. Then, the nut is provided with slits for the passage of said anchorages.
The front end of the fo
REFERENCES:
patent: 1065034 (1913-06-01), Ehlert
patent: 4111318 (1978-09-01), Lutz
patent: 4747747 (1988-05-01), Fusco et al.
patent: 4805852 (1989-02-01), Nordstrom
Keenan James
Spar Robert J.
Uni-Load AB
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