Material or article handling – Horizontally swinging load support – Swinging about pivot
Patent
1997-02-07
1999-06-15
Krizek, Janice L.
Material or article handling
Horizontally swinging load support
Swinging about pivot
4147448, 414800, B65H 3100
Patent
active
059115572
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus for the removal and transfer of an object, in particular a stack of layers placed above one another, in particular paper products, for example signatures, from a first station, for example a collecting location, to another station, a second station. The apparatus has a grasper device which has an upper and a lower grasper unit, with the grasper device being movable out of a first position in which it is located or in front of the collecting location, termed a first station in the following, and is movable, after movement out of the first station, and after a rotation, into a second position, i.e. in front of the second station.
In the grasper device described in the main application P 44 27 703.2 the grasper units of the grasper device are so dimensioned that they do not fully engage beneath and also above the object, in that case a stack of signatures, over the full length of signatures, but rather only up to the half of the signatures, in order to be able to later strap or bind up the stack in the second station while still in the grasper.
However, this has the consequence that the non-grasped region of the stack hangs downwardly despite the stabilisation measures, in particular with shallow stacks, and is exposed to the danger of damage.
The present invention is thus based on the object of setting forth a method by means of which the stack in general or an object of this kind can be brought as securely as possible from one station to a second one and to so further develop the apparatus of P 44 27 703.2 that a the hanging down of the non-grasped region of an object, for example layers placed above one another, in particular signatures, can be protected against the danger of damage on being removed from a first station and transferred to a second station.
The object is satisfied with respect to the method in that the grasper device draws the object, after it has grasped it, onto a support means during the return movement out of the collecting location, with the object remaining at rest on the support means during the rotation of the rotary table, and from which it is pushed down again on movement of the grasper device up to the processing location or deposition location.
In a variant of this method, during the inward movement of the grasper device, a support extension is extended, at least at the lower grasper unit, which extends the lower grasper unit towards the front, so that a greater support is offered to the object.
The support or the extension of the support is advantageously moved in again on the approach of the grasper device to the processing location, or to the setting down location of the second station, so that there the intended processing step, for example the banding can take place, without this banding being hindered by handling means.
With respect to the apparatus, the object is satisfied by support means arranged in the same plane as or fractionally beneath the lower grasper unit and on which the object is supported on being moved out of the first station after having been grasped.
The support means can advantageously be brought into and out of operation, with them forming an extension of the lower grasper unit in the operating mode.
It is advantageous in this respect that the support means can be controllably moved over a specific path substantially parallel to the lower grasper unit. In a preferred embodiment, the support means are arranged on the grasper device.
In this respect it can be advantageous that the support means are lockable in a predetermined position in relationship to the grasper device. The locking advantageously takes place at the rotary table. It is then advantageous when means are provided at the grasper device to release the locking of the support means.
The support means are advantageously guided on the lower grasper unit.
For this purpose, in accordance with a preferred embodiment, the lower grasper unit has longitudinally slotted tubes, or downwardly open U-section carriers, as grasper parts, with the support means formed as
REFERENCES:
patent: 3085501 (1963-04-01), Wimmer
patent: 4383788 (1983-05-01), Sylvander
patent: 4588070 (1986-05-01), Smith
patent: 4787810 (1988-11-01), Cawley et al.
patent: 5042862 (1991-08-01), Tubke
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