Material or article handling – Horizontally swinging load support – Swinging about pivot
Patent
1997-01-31
1998-10-27
Buci, David A.
Material or article handling
Horizontally swinging load support
Swinging about pivot
4147442, 414623, 4147902, B65G 4790
Patent
active
058270396
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus for handling a stack of sheet-like products.
Such stacks of sheet-like products, for example when these are folded printed products, are normally pushed from the stacking table by an ejector onto a conveyor device consisting of rollers or a transport belt which conveys the stack on further. A treatment of this kind, namely the ejection and the subsequent transportation on a rolling belt can, with certain stacks, lead to a shifting of the product in the stack, so that the danger exists that the stack falls apart.
A rotatable table for stackers in book-binding workshops is known from EP-A-O 057 894 and has a diametral slot in which a slider is movably arranged. A stack is formed on the rotatable table in the interior of four vertical guides and is ejected sideways by the slider after the lateral displacement of the guides.
A transfer device for a stack of folded endless paper is known from WO-A-94 12 351. This apparatus has a transfer fork which can be moved forward and back and is also pivotable about an axis. For the handling of a paper stack, the transfer fork, whose upper and lower fork elements are rigidly arranged relative to one another, is moved into a transfer unit and is subsequently pivoted about a horizontal axis though 180.degree.. Following this, a slider is actuated which ejects the paper stack from the transfer fork and transfers it to a further handling unit.
The invention is based on the object of improving an apparatus of the named kind in such a way that the stack which arises can be reliably removed without delay in accordance with the high working speed and conveyed to a further processing station. The solution of this object is achieved by an apparatus for handling a stack of sheet-like products comprising: have an upper and lower gripper unit, wherein, a horizontal guide of the rotary table.
Through the apparatus of this invention a reliable grasping and also removal of the stack from the stacking station and its conveyance to the further processing station is ensured with a high working speed of the production line without the stack falling apart.
Advantageous measures are set forth in the subordinate claims which in each case recite a favourable further development of the apparatus.
The gripper device with the specially designed upper and lower gripper units represents an important inventive measure. The stack experiences excellent stabilisation through the special features of the upper gripper unit which presses a channel or several waves into the stack in the removal direction of the gripper, with the stack adopting this one or multiple channel-like structure over its entire stack height as a consequence of the fork-like design of the lower gripper unit, so that no additional measures are required to fix the individually stacked printed products or to hold them in position.
In the following, the apparatus will be explained in more detail with reference to the embodiments shown. There are shown:
FIG. 1 a general drawing of the apparatus for removing a stack in the working position directly at the stacking station,
FIG. 2 a view of the apparatus for removal seen in the direction of the arrow II in FIG. 1, with both gripper devices being shown,
FIG. 3 a view of a gripper unit from the direction of the arrow III in FIG. 1 directly after the grasping of a stack,
FIGS. 4a to c respective detail representations of a carriage guide arrangement and also of a drive arrangement of a gripper unit,
FIG. 5 a schematic illustration of a wave-stabilisation by multiple bar arrangements,
FIG. 6 a schematic illustration of an apparatus for moving beneath, and
FIG. 7 a schematic illustration of a rotary table formed as a carousel with more than two gripper devices.
In FIG. 1 there is shown an apparatus 1 for removing a stack 12 from a collection point or position 2 in a stacking device.
The apparatus has two gripper devices 3, 3' of which only the device 3 is shown in FIG. 1. The gripper device 3 is illustrated in continuous lines in the position in front of the
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Buci David A.
Hess Douglas
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