Material or article handling – With weighing
Patent
1982-01-04
1984-07-10
Paperner, Leslie J.
Material or article handling
With weighing
414 83, 414 84, 414564, 414662, B65G 5714
Patent
active
044590768
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an apparatus for vertical transport of goods, for instance transportation of pieces of packages from a packing line or a conveyor onto a pallet.
PRIOR ART
Devices for successively lowering a pallet as pieces of packages are moved onto the pallet are previously known in connection with loading of pallets. It is also previously known to use a lifting fork to lower received pieces of packages down onto a pallet, which is not moved during the operation. The previously known devices are often constructed in an unnecessarily complicated way both as far as the mechanical system is concerned as well as concerning the control system. The previously known devices of this type, as illustrated by the structures described in Swedish patent specification No. 200.217 and DE Offenlegungsschrift No. 26 20 535 are used for lowering pieces of packages from a conveyor onto a pallet. According to DE Offenlegungsschrift No. 26 20 535 the apparatus thereof is provided with lifting forks for receiving and lowering pieces of packages onto a pallet, and then specific wipers are used for wiping the pieces of packages off the lifting forks and onto the pallet. For that cycle of operations three separate chain transmissions are used, all driven by its own individual motor, and in one alternative one of said transmissions is replaced by a hydraulic cylinder.
A SHORT STATEMENT OF THE PRESENT INVENTION
The technical problem to be solved by the present invention relates to lowering pieces of packages from an upper level, for instance a conveyor, down to a lower level, for instance a pallet. This operation was previously carried out either manually or by the aid of complicated, voluminous and expensive machines.
The above problem is solved in accordance with the present invention by using one single transmission driven by one single motor for performing the intended cycle of operations. An endless transmission belt or chain is used for co-operating with one single electrical motor for obtaining both a horizontal and a vertical movement when the apparatus performs a cycle of operations. Preferably, counterweights are used in order to balance the weight of the lifting device according to the invention.
The advantages obtained by the present invention are among other things that a relatively simple mechanical structure is obtained, that only a minimum force consumption is necessary, that an uncomplicated electrical control system is used, which all result in a fail-safe and low energy consuming machine having a very low total weight. When carefully chosing the weights of the counterweights used in the machine in relation to the weight of the pieces of packages to be handled by the machine it is possible to use a drive motor of a small size, which results in a low energy consuming structure.
DESCRIPTION OF THE FIGURES
FIG. 1 is illustrating in a schematic side elevational view a preferred embodiment of the device according to the invention, and
FIG. 2 is illustrating in a schematic top elevational view the device according to the invention as illustrated in FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENT
A preferred embodiment of the invention is illustrated in the figures and comprises a machine for loading pieces of packages from a packing line 15 down onto a pallet 17. The machine comprises a horizontally travelling waggon 1 provided with a vertically movable lifting device 2 having lifting forks 16 for receiving and lowering the pieces of packages. Counterweights 12 are arranged in connection with the horizontally travelling waggon 1, said counterweights being connected by wires 11 to the vertically movable lifting device 2. By using said counterweights there is only need for a minimum effect to be used both in connection with raising and lowering the lifting forks 16. The transmission means comprises in the preferred embodiment an endless cogged belt 4, which is connected at 9 to the vertically movable lifting device 2 and is driven by one single small electrical motor 3.
In th
REFERENCES:
patent: 3095984 (1963-07-01), Lindkvist
patent: 3187917 (1965-06-01), Miller
patent: 3490616 (1970-01-01), Castaldi
patent: 3536194 (1970-10-01), Novak
patent: 3799377 (1974-03-01), Suizu
patent: 3863777 (1975-02-01), Murata
Krizek Janice
Paperner Leslie J.
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