Metal working – Plural diverse manufacturing apparatus including means for... – Separate tool stations for selective or successive operation...
Patent
1991-04-10
1992-07-21
Briggs, William
Metal working
Plural diverse manufacturing apparatus including means for...
Separate tool stations for selective or successive operation...
294264, 83909, B23P 1900, B26D 900
Patent
active
051311356
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a wire-removing device for units consisting of two stacks standing closely next to one another and each composed of two or more bales arranged one on top of the other, each unit being surrounded in one plane by a bundle embracing all the bales and composed of a plurality of parallel individual wires.
The units normally each consist of six to eight bales, for example pulp bales or the like, each individual bale being surrounded by a plurality of tying wires. Two stacks composed of three or four bales are placed with their longer sides against one another and held together firmly by means of an encircling bundle composed of six to ten individual wires which are attached mechanically.
To remove the wire from the units, it is known to sever the bundle of individual wires by means of heavy lever cutters and to take it off by hand. The removal of wire from the individual bales can be carried out, for example, by a wire-removing machine according to German Offenlegungsschrift 3,707,966.
Not only is the removal of wire by hand dangerous for the attendance crew, but the long individual wires also have to be disposed of separately, for which purpose special winding devices for the wires are provided.
The object on which the invention is based is also to carry out the removal of wire from the units fully automatically, whilst at the same time the wire bundle will be wound to form a coil.
According to the invention, this object is achieved by means of a device which is characterised b a conveying means, by which the units can be transported into a predetermined position in the wire-removing device, by a wire-cutting means for severing the wire bundle in the lower region of the unit, by a wire-lifting means for lifting the severed wire bundle from the top side of the unit, by a gripping means which grasps the wire bundle on both sides of the wire-lifting means and which brings it into a predetermined extraction position, and by a winding means, by which the wire bundle is grasped, wound up to form a closely packed roll and ejected from the device.
The device according to the invention makes it possible to remove wire from the units fully automatically, and at the same time the wire bundle can be disposed of in a space-saving manner. The wire-lifting means guarantees that the gripping means bringing the wire bundle into a position favourable for the winding means, while being brought together, does not come in contact with the tying wires of the individual bales and does not catch on these. A fault-free working of the device is guaranteed in this way.
Preferably, there is a bale-tilting means, by which the two stacks can be so tilted away from one another at an angle that between the two stacks forms a wedge-shaped gap which starts from the top side of the unit and into which a lifting arm of the wire-lifting means can engage and lift the wire bundle from below to such an extent that it comes free from the bales and can easily be grasped by the gripping means.
The lifting arm is appropriately pivotable about a horizontal axis. Before it is used, it hangs vertically downwards, specifically in a region outside the passageway of the units. As soon as the two bale stacks have been spread apart by the bale-tilting means, the lifting arm can engage from below between the two bale stacks and lift the severed wire bundle in this region.
The conveying means preferably consists of two conveyor chains which are arranged at a distance from one another and between which there is sufficient free space. The wire-cutting means can be arranged in this free space between the conveyor chains, specifically preferably transversely relative to the conveying direction, so that the wire bundle can be severed on the underside of the unit.
The wire-cutting means appropriately consists of two elongate knife bars which are equipped on their cutting sides with teeth arranged at regular intervals and which can be pushed to and fro relative to one another. Such a wire-cutting means is known from German Patent Specification 2,
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patent: 4660818 (1987-04-01), Conner et al.
patent: 4718157 (1988-01-01), Keyzers et al.
patent: 4841619 (1989-06-01), Theriault
patent: 4850087 (1989-07-01), Gronau
patent: 4995784 (1991-02-01), Boisseau
B&G-Fordertechnik GmbH
Briggs William
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