Conveyors: power-driven – Conveyor system for establishing and moving a group of items – By depositing items successively from one conveyor onto...
Patent
1986-12-22
1988-08-23
Valenza, Joseph E.
Conveyors: power-driven
Conveyor system for establishing and moving a group of items
By depositing items successively from one conveyor onto...
1984636, 1984688, 414 29, B65G 4726
Patent
active
047654520
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a device in a machine handling package units, comprising a conveyer with several endless elements running in parallel for the conveyance of the units, a number of abutments for the conveyed units, spaced in the longitudinal direction of the conveyor, which can be raised individually between the endless elements, and a gripper for lifting off the units detained against the abutments.
In a prior art embodiment of such a device the abutments comprise pins arranged in groups, the pins in each group being aligned in the transverse direction of the conveyer and being displaceable vertically between a lower inoperative position, in which the pins are below the load-carrying surface of the endless elements, and an upper operative position, in which the pins project above the load-carrying surface of the endless elements to detain the units being advanced on the conveyer. The endless elements then will slip against the underside of the detained units. The groups of pins are mutually spaced in the longitudinal direction of the conveyer and are successively adjusted from the inoperative to the operative position thereof, starting from the group most remote downstream, the pins in each group being displaced jointly. When a unit abuts a group of pins and is detained by the pins thereof, the next group of pins, as seen in the upstream direction, is displaced to the operative position to detain the next unit approaching on the conveyor, and this proceeds until a predetermined number of units are detained in a stationary position on the conveyor, which is moving continuously and, as mentioned above, slips against the underside of the units. The gripper, which in the prior art embodiment comprises an assembly with a number of suction cups, then is moved towards the units to suck up said units and then causes the units to be lifted from the conveyer and to be deposited in a packagebox, in a tray, or on a pallet. In this way layer by layer of package units are removed from the conveyer to be deposited in the packagebox.
The prior art device described above performs well but the working speed thereof is limited because the suction cups have to come to a halt a short distance above the package units until all those units to be included in a layer are positioned on the conveyer. Not until then the suction cups can be engaged with the units and lift these off, and not until the lifting off has taken place the next unit can advance to the pins most remote downstream.
It is an object of this invention to provide a device of the kind referred to above permitting an increased speed in handling the package units and moreover enabling package units in form of bags to be packed in a more space saving way, i.e. with the bags of one and the same layer partly overlapping each other.
To achieve the object referred to above the device according to the invention has obtained the characteristics described below and shown in the drawings.
In order to explain the invention an embodiment thereof will be described in more detail below with reference to the accompanying drawings, wherein
FIG. 1. is a side view of the device according to the invention and
FIG. 2 is an end view of the device.
In the drawings the device according to the invention is shown applied to a machine for handling bags, and in this embodiment it has been found to be in principal particulary well adapted for handling also bags with such fragile content as potatochips.
The device comprises a conveyer with a number of endless elements 10 running in parallel, which are spaced in the transverse direction of the conveyer and may comprise belts or cords. The endless elements run around turning wheels 11, rotatably mounted on a frame 12, and are supported in the upper load-carrying part thereof on beams or rails 13 having a box-like cross section, which extend in the longitudinal direction of the conveyer. The feeding direction of the conveyer is indicated by an arrow 14. At the downstream end of the conveyer stationary abutments 15 are arranged comprising a
REFERENCES:
patent: 4120393 (1978-10-01), Motooka et al.
patent: 4199050 (1980-04-01), Moller
Packsystem i Lund AB
Valenza Joseph E.
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