Conveyors: power-driven – Conveyor section – Reciprocating conveying surface
Patent
1994-09-12
1996-06-04
Valenza, Joseph E.
Conveyors: power-driven
Conveyor section
Reciprocating conveying surface
B65G 2500
Patent
active
055224954
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a conveyor device for moving of goods according to the preample av claim 1. More close the invention relates to an, in a foundation arranged device by means of which goods placed on the same can be moved from a storing surface to another and essentially in horizontal direction.
PRIOR ART
From e.g. the European patent specification 0 103 999 (Dickson-Wright, Edward Anthony) is known a device for moving of goods. The same consists of a number of longitudinal and substantially parallel and in a foundation arranged moving organs. These are including an upper, goods carrying part and a lower profile which is counter-sinked in the foundation. In the profile is enclosed a rail for rollers, which allows the goods carrying part to be displaced relative to the profile. For raising and lowering of the rail and thereby also of the goods carrying part is provided a longitudinal, hose-shaped part, which can be expanded thereby raising the goods carrying part by supply a pressure medium as pressure air.
A similar device is known from the Swedish publication 318 822 (Iversen) and WO 86/04883 (Hagedorn). Raising and lowering of the goods carrying part is here effected by lengthwise displacement of this part relative to an underlaying trolley. The displacement is effected by means of pulling forces in a chain or similar flexible element which also is used for the movement of the trolley and which ends are secured to the trolley respective the goods carrying part.
The intention is that the foundation, in which the parts are counter-sinked, shall form a surface for placing of goods, which are delivered by means of other conveyors, fork-trucks or cranes for example. The goods carrying parts can be moved from a position within the reach of the rails to a position outside of the same. By raising of the goods carrying parts the on the foundation resting goods can be raised a little. By movement of the goods carrying parts also the on the same resting goods will be moved in the same direction and can consequently be moved to a position outside of the foundation. If also here is arranged a resting surface with recesses, which allow containing of the goods carrying parts, the goods by lowering of these parts can be placed on this resting surface whereof the goods carrying parts can be withdrawn in lowered position in the profiles for repetition of the operation. By moving of the goods carrying parts in its lowered position and thereafter effecting a raising and a return movement the goods can be moved in the other direction, consequently to be placed on the first said foundation.
Devices of this type are generally used for moving goods from a loading structure, to which it is delivered, and onto a vehicle for further transportation or reverse. The loading structure is thereby provided with the device and the vehicles have to be provided with recesses in their loading surface so that the longitudinal goods carrying parts can be contained. As it is of interest to design the device relatively slim also these recesses have to be provided with rails for supporting of the goods carrying parts and in some designs also with lifting means of the described type.
TECHNICAL PROBLEM
Devices of the first described type have in the first hand the disadvantage that the raising element, as mentioned having the shape of a hose, which as being made of a flexible, canvas-like material and has an extended form, is sensitive to damage and wearing of the material as a result of its frequent flexing and the inner pressure. Another disadvantage is that the only pressure medium which can be used in practise is pressure air; use of hydraulic fluid would bring a too large risk for damage through leaking. To provide a pressure air plant represents a relatively great effort, mucher greater than the providing of a hydraulic pump. The filling of the hose with air and above all emptying by raising respective lowering requires a substantial period of time as the hose often is of substantial length. Also the arrangement
REFERENCES:
patent: 3420358 (1969-01-01), Iversen
patent: 3512628 (1970-05-01), Keough
patent: 3581880 (1971-06-01), Iversen
patent: 3952887 (1976-04-01), Lutz
patent: 4040514 (1977-08-01), Pielsticker et al.
patent: 5082415 (1992-01-01), Hayashi
Trancel Technics AB
Valenza Joseph E.
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