DE7618848U1 - DEVICE FOR SEPARATING AND STACKING DIE-CUT SHEETS - Google Patents

Description

It (IM Il * \

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Dr. '-' lng. ' Ernsf 'Sfröhnann Patent attorney

4 Düsseldorf 1 Schadowplatz 9

• The invention relates to a device for separation and stacking of sheets of paper, cardboard and the like, which are made by a sheet punching machine and consist of utility and waste pieces connected to one another by narrow bridges.

In the packaging industry in particular, they are used to manufacture of the packaging required punched parts produced by using large sheets of paper, cardboard and the like required benefit sections are punched out, wherein a sheet can include a number of copies. So with then moving the sheets out of the sheet punching machine, there are no disruptions due to usable or scrap pieces falling out occur, one leaves narrow bridges between the individual benefit sections' and / or waste pieces, so that the sheet as

Unit can be transported further. However, before the individual Use and waste pieces must be separated from one another. Such a separating device is shown, for example, in DT-OS 2 310 021. In this known arrangement, such devices are punched Sheets are fed into a separating unit and separated there in the longitudinal and transverse directions. Then the

Tetefon J02JI1) 32 08 58 telegrams Custopat

12/01/77

Düsseldorf, June 11, 1976 7663 Gm

WUPA-Maschinenfabrik GmbH & Co. KG
4051 Brüggen · '

(3 · Device for separating and stacking
punched sheets

separated uses piled on a pallet. It is also possible to arrange several stacks on top of each other, being unpunched between the individual stacks for stabilization Sheets are inserted.

This known arrangement has several disadvantages. On the one hand ψ the separation option is limited to longitudinal and transverse separation,

so that more complicated forms are separated only with difficulty

can be. Another disadvantage is that separation * and stacking take place in different stations, so that

. <m results in a very large overall length. Both separator and

Stacking devices have a very complex structure, which makes the system not only expensive, but also, in particular, prone to failure

power. The conversion of the system to a modified punched profile is for the same reason with considerable difficulties connected.

The known device has the further disadvantage that the supply of punched to move out the finished stack Arches and thus also the punching device for a longer one Time must be turned off. This reduces the number of frames that can be punched and stacked per hour.

In the DT-OS 2 404 840 a finger-like tool is described, with which it is possible to separate the benefits of a sheet lying on a flat separating surface from one another, that when the pinger is placed on two benefits to be separated, the fingers are spread apart by further pressing down and the connecting webs between the panels are torn.

The object of the invention is to provide a device for separating and stacking of punched sheets of paper, cardboard and the like, in which the relatively long downtime was known Arrangement can be reduced and in which the device also takes up much less space.

7618848 01.1177

According to the invention, the object is achieved by the features of the main claim solved.

The time saving is achieved in particular by the fact that the supply of punched sheets is only interrupted for a very short time needs to become. In particular, however, the downtime for the punching machine required in accordance with the prior art is eliminated during the transport of the full stack, because according to the invention during the time during which the full pallet moved away and a new empty pallet is fed in, the sheets that have arisen in the meantime on an intermediate carrier (namely a trolley) can be stacked. The space saving results from the fact that the stacking and separation takes place on the same station.

With the device according to the invention, it is easier Way possible by inserting unpunched sheets to increase the stability of the stack formed from punched sheets. For example, either only on the bottom of the stack and the top of the stack are each an unpunched sheet arranged, or it can also between individual S-pile sections unpunched to further increase stability Sheets are inserted.

The device according to the invention, like that of DT-OS 2 310 021, has a feed device connected after a sheet punching machine For punched, but not yet separated sheets, which lead the sheets to a cutting station, where they are separated by cutting tools is made. The known device also comprises a stacking plane for receiving the separated sheets in stacked form.

In contrast, the device according to the invention (for Solution of the object according to the invention) the parting plane from one Separating table or a trolley or the top sheet of a stack of sheets lying on the separating table or trolley. In addition, both the cutting table and the trolley are height-adjustable, the stacking level is from one below

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of the cutting table retractable and extendable and height-adjustable pallet and it is a device for lateral Shifting of the cutting table while holding back the stack of sheets into a position outside the pallet area and intended to be retracted again above the stack of sheets. This device is stacked and separated on the same station so that space is saved. As a result / that the trolley is also provided in addition to the actual cutting table, It also succeeds in punching and separating in the time in which a filled pallet is moved away and a new empty one is fed.

According to claim 1, a support bar is used to prevent the stack from possibly when the separating table is withdrawn tilts.

Further support devices are taught in claims 3 and 4.

Appropriately, the pallet is placed on a pallet carrier so that it is not necessary, for. B. with a Forklift truck to introduce the pallet directly into the machine, see claims 5 and 6.

In order to introduce the unpunched sheets supporting the stack of separate sheets into the stack, those in the claims are used 7-9 claimed features.

These devices as well as the support walls according to the claim can be folded away, thereby increasing the possibility of use the facility expanded.

Conveniently, the various parts of the device are adjustable so that different sheet sizes can be processed be able.

The device is particularly suitable for the cutting tools described in DT-OS 2 404, which are themselves very complicated

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Can separate punch lines because there are no space-consuming sub-tools required are. In addition to the splay fingers, it is useful to separate the edge area (in particular of the gripping edge) to provide separating pins and to arrange holding stamps to support large parts of the sheets, see claim 12.

The invention is explained below on the basis of an exemplary embodiment explained in more detail, which is shown in the figures.

Show it

Figs. 1-4

schematically and partly in sectional view, an embodiment of the device according to the invention in different work phases.

In Fig. 1, a separating table 1 is shown on which a punched or unpunched sheet 2 made of paper or cardboard or similar material. By means of a gripper 3 is to be separated from a sheet punching machine, not shown ^, the punched sheet 4 made of paper, cardboard and the like. Pulled over the separating table 1, the sheet with respect to the cutting station is precisely aligned. Above the cutting table there is a rod 22 moving up and down, on the one hand a separating pin 5 rigid and on the other hand spreading finger 7, holding stamp 8 and pressure sensor 9 adjustable are attached.

The arrangement described so far serves to separate the sheet 4 fed in by the gripper 3 by, when lowering. go of the boom 22 first of the separating pin 5 the bow from the holding edge 24 that is clamped in the gripper 3 separates _f so that the arc 4, hangs up on the surface of the separating table 1 or on the separating table lying sheet or the sheet stack. As the rod 22 continues to descend, the contact surfaces of the spreading fingers 7 and the holding stamp 8 touch

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and the pressing pressure sensor 9, the various use and waste parts. As the person descends further, the pingers 7, which are arranged above a cut line to be separated, spread apart and tear the webs that still connect this cut line to one another, so that during the subsequent upward movement of the linkage 22 a separate arc remains on the parting surface. During the upward movement of the boom runs the gripper 3, the z. 3. is attached to circumferential retaining chains (not shown) along its movement curve 26 in the direction of the Pteiles 28 further to further not shown To make room for grippers with further punched sheets and to return to the sheet punching machine and - after the Holding edge 24 in a suitable place - to grab a new sheet at its holding edge in the sheet punching machine.

So that the height of the plane at which the sheet 4 fed in by the gripper 3 is separated is kept constant, the separating table 1 moves downwards with increasing stack height, see arrow 30. This downward movement of the separating table 1 can, for example, by means of hydraulic devices, but also take place by spindles or similar devices, the control of the cutting table height z. B. can be done by means of e, ^J -.nes sensor, which detects the baling pressure and keeps it at a certain value by regulating the height of the cutting table.

The height of the cutting table 1 is not directly influenced by, for example, the spindles, but via a guide (not shown), which makes it possible to move the cutting table in the horizontal direction, especially him to pull out to the left, as indicated in Fig. 2 by the arrow.

This moving out of the cutting table 1 takes place as soon as a certain number of sheets has been stacked or as soon as the stack 18 formed from these sheets has reached a certain height. Before, however, after reaching the predetermined

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Number of sheets or the specific height of the stack 18, the separating table 1 is moved out, the supply of further sheets from the sheet punching machine is interrupted - that is, the sheet punching machine is switched off for a short time - and the separating table 1 is moved a certain distance up to the figure shown in 2 lowered height shown. This creates a free space between the top of the stack 18 and the parting plane, into which a roller table 34, shown only schematically, can be moved. Roller tables are known in stamping technology and do not need to be explained in more detail here. An auxiliary separating surface is formed by the roller table so that after the roller table 34 has moved in, the supply of punched sheets and thus the operation of the sheet punching machine can be resumed, so that the downtime of the machine can be kept very short. The height of the roller table, like the cutting table 1, can be controlled so that the uppermost surface of the stack of sheets now formed on the roller table also serves as the separation plane.

While the roller table takes over the intermediate stacking of the sheets, the separating table 1 moves in its guide, not shown to the left out (see Fig. 2), being supported by a retaining wall 10, which is also in the form of one or more retaining strips can assume that the stack 18 is held. Located below the cutting table B 1, which is shifting to the left a pallet 17, z. B. a conventional Euro pallet, which in turn rests on a pallet carrier 16. So not the one sheet stack 18 consisting of several individual stacks tilts or shifts when the separating table 1 is pulled out, it is It is expedient to provide a bar 12 which extends the right edge of the stack 18 at the level of the upper side of the separating table 1 holds. A contact wall 11 connected to the strip 12 can also serve to further support the stack, see in particular Fig. 3.

Due to the arrangement of the bar 12, the stack of sheets bends when the separating table 1 is pulled out in the area of the

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the surface inwards and downwards, so that the individual stack parts support each other. Only when the cutting table only holds the last few centimeters of the left edge of the stack, the separating table 1 and the bar become at the same time withdrawn so that the entire stack is now placed on the pallet.

Due to the arrangement of the already mentioned, expediently unpunched sheet 2, which, however, is not absolutely necessary is, there is a further stabilization of the sheet stack consisting of several partial stacks 18, which is especially then It is important if the pallet 17 does not have a smooth surface, but rather 36 spaces between the individual boards that may be larger than the width of the narrowest Partial batch.

After placing the stack 18 on the pallet 17, the Pallet 17 either by conventional means, e.g. B. forklift, be pulled out of the device, or the The pallet carrier 16 itself is movably arranged and can be moved out together with the pallet 17. While a new pallet 17 is supplied, the separating table is retracted again, see arrow 40 in Fig. 3, and for the purpose of Storage of the stack 18 removed strip 12 (see FIG. 3) is in its starting position on the surface of the cutting table 1 again arranged (see arrow 42 Fig. 4) and moved up again together with the cutting table, see arrow 44 in Fig. 4.

The pallet carrier 16 can be designed so that it can also be lowered so that it is not absolutely necessary is to drive away the pallet 17 with the stacks 18. Instead, pallet 17 and stack 18 could then also be lowered so far be that the separating table 1 can be retracted above the stack 18, as shown in FIG.

This possibility is important when there are several unpunched sheets within the stack 18 to support the stack

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should be inserted. For this purpose, a special device / which in the illustrated embodiment consists of a supply stack 14 of unpunched sheets and a suction device 13 is used. The suction device 13 has a piston 46 which, before the cutting table 1 extends (see FIG. 1), lowers to the top sheet 15 of the stack 14 of unpunched sheets and adheres to this sheet by suction. The suction effect can be generated by depressions in the underside of the piston 46, in which a negative pressure is created. As soon as the sheet 15 adheres to the piston 46, this is C) pulled upward so far that the cutting table 1 can slide past under the sheet. After the separating table 1 has been fully extended, the suction effect is eliminated and the sheet is thus placed on the separating table 1.

There may be several suction devices 13 which raise the entire sheet so far that the table 1 is below this Bow can slide. In most cases, however, it will be sufficient to use one or a few in the edge region of the sheet 15 Suction devices 13 to lift only this edge area above the table 1, because when the table is extended, this will remove the rest Then automatically pushes parts of the sheet onto the cutting table 1,

When the cutting table 1 now returns to the punching area as shown in FIG. 3 and is lifted upwards, it carries on its So surface the unpunched sheet 15 or 2, if the The starting position of FIG. 1 is reached again.

! The feeding of sheets and thus the sheet punching machine will be

now stopped again briefly and during this time the roller table 34, on which a small pile of punched and separated sheets has formed in the meantime, drove away and the stack is deposited on the unpunched sheet 2 or 15. Then the feeding of sheets can be resumed and continue until the desired number of sheets or the desired height of the stack is reached, whereupon according to FIG. 2, the cutting table 1 again moves to the left and the

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formed stack 18 either on the pallet 17 or, if there is already a stack 18 on this, see Fig. 4, deposits the newly formed stack on this stack, with a supporting one between the two stacks then present unpunched sheet is inserted.

This process can be repeated a few times, so that finally a stack 18 results in which several unpunched Support arches are arranged.

It is advisable, before moving away the stack 18 on its pallet 17, to finish off an unpunched sheet 2 or to put on, which can be done by the fact that the cutting table after taking over a sheet 15 and returning to its in Fig. The position shown again moves to the left and thereby leaves the sheet 15 behind and deposits it on the stack 18.

Now the stack 18, reinforced by a lower and upper unpunched sheet and possibly unpunched in between Sheets can be moved or packaged for further use.

About the friction between the cutting table and the one on top To reduce the stack to extend the separating table to the left, it can be useful to use known ball valves on the Top of the cutting table to form an air cushion. The ball valves work in such a way that a little over the Ball protruding at the cutting table level, an air valve closes when there is no material on the surface. However, it will be sheet material placed on the surface, this presses the ball down so far that it no longer protrudes above the plane, lifting the ball out of the valve seat and allowing air to escape under the sheet material The formation of air cushions increases to such an extent that the friction between the pile of sheets and the table surface is very low. The one when driving out The separating table surfaces that become free then release the ball again, causing it to close the valves and insert them unwanted leakage of. Prevent air.

7618848 01.1177

The finished stacks usually have a maximum height of 1.50 m, because with such a height the flexibility of the stack is already so large that a sufficient counterforce may possibly be exerted by the spreading fingers 7 when separating is no longer given, for this reason it is also expedient to use the stack formed on the pallet from several partial stacks a height of, for example, 15 to 20 cm each, a maximum of 30 cm in height.

'. In order to be able to process sheets of different sizes, leave

(Λ adjust certain waistlines of the device. For example, you can

: the bar 12 and the associated investment wall 11 to the right

j if, instead of the one in z. B. Fig. 2 shown

\ Sheet width sheets are to be stacked with a width

• the z. B. occupy the full width of the pallet. In a similar way

\ Way then it would be-r and the suction device 13 and the stop

j adjustable for the stack 14.

, With the inventive device, a normal j filing function is achieved if the retaining wall 10 and the \ suction device be tilted away 13, as shown in Fig. 1 in gell dashed lines. The T.renntisch I 1 operates then as a roller table, especially if the friction is reduced by means of the I J air cushion arrangement. The .Stack, ι can then be pushed out of the stacking device by hand

\ will. This is advantageous for some applications.

] When using the usual wooden pallet, the Tist'-.

I also protect the cutting tools against the pallet,

which, being made of wood and usually not treated particularly gently, could have protruding splinters and the like, which get into the cutting tools with the usual known cutting device and damage them. Another The danger is that such protruding parts of a damaged wooden pallet, in particular, also move very quickly could damage moving gripper device if the table 1 were not present as a separation and intermediate carrier.

If I

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The retaining wall 10 and the system wall 11 can be made of sheet metal but it is also advisable to use stretched cloths.

As tests have shown, the inventive The device for separating and stacking the sheets not only has a higher operating speed (with the known device processing of 5000 sheets per hour is possible with the new separating and depositing device, working punching device the processing of 7000 sheets per hour), due to the shorter shutdown times according to the new In the process, the number of sheets that drop out per stack formation is also smaller: while with the known machine it is around 100 Sheets per stack are, it is with the device according to the invention despite the higher processing speed only 30 sheets. As a result, the device according to the invention works much more rational than was previously possible.

In addition, there is the much smaller spatial expansion that is required for the device according to the invention. Opposite to a device without the special stacking device, the present machine is only half a meter longer. Against it would be an increase in the length of the machine by 50 to 60% of the total extension is required if a stacking device is known Art would have to be used.

Protection claims:

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Claims (14)

■ III Il ■ I II I I I I · · III Bill I Il t I ■ I - 13 - ' S c h u t ζ a η s ρ r ü c h e: Device for separating and stacking sheets of paper, Cardboard and the like, which are delivered by a sheet punching machine and connected to one another by narrow bridges Use and waste pieces consist, consisting of a feed device downstream of the sheet punching machine for feeding punched, but still unseparated Bends on a parting plane, from the separating mechanism arranged above the parting plane and movable up and down on rods ('" _t create as well as a stacking level for receiving the stack from separate sheets, characterized in that the s
Parting line from a cutting table (1) or a trolley (34) or the top sheet of a sheet stack (18) lying on the cutting table (1) or trolley (34) is that both separating table (1) and trolley (34) are adjustable in height so that the stacking level can be moved in and out from below the cutting table (1) and is formed vertically adjustable on the pallet (17) and that a device for the lateral displacement of the cutting table (1) and restraint of the sheet stack (18) in a position outside of the pallet area and to be retracted again above the 3ogeiistapels (18) is provided. 2. Apparatus according to claim 1, characterized by a height the cutting table level below the one edge of the bottom opposite the cutting table displacement area on the cutting table (1) lying sheet engaging bar (12) to support one end of the stack (18) at Pulling away the separating table (1) in the direction of the other end until the separating table (1) is below the surface of the stack (18) has released. 3. Apparatus according to claim 2, characterized by one (or more) connected to the bar (12) upwards extending system bar (s) or system wall (11). 7618848 12/01/77 4. Device according to one of the preceding claims 1-3, ge ι is indicated by one (or more) on the side of the Retention bar (s) or wall lying on the extension area ■ 5. Device according to one of the preceding claims 1-4, characterized by a height-adjustable pallet carrier (16) for receiving a pallet (17). \ 6. Apparatus according to claim 5, characterized in that the ! Pallet carrier (16) laterally her..us is movable. 7. Device according to one of the preceding claims 1-6, ge; ^; characterized by a device for supporting a unpunched sheet (15) on the separating isob (1) if this is in the extended state. : 8. Apparatus according to claim 7, characterized in that the Device consists of a suction device (13) which is provided by a suction device located below the lower surface of the separating table Stack (14) of unpunched sheets the top sheet ■ (15) to be lifted above the surface of the cutting table (1) is able before it extends and releases the sheet (15) when the cutting table (1) is below the sheet (15) is located. 9. Apparatus according to claim 8, characterized in that the suction device (13) only in the region of the edge of the sheet (15) is provided, under which the separator (1) penetrates first when extending. 10. Apparatus according to claim 7, 8 or 9, characterized in that that the device can be folded away together with the retaining strip (s) or wall (10). 11. Device according to one of the preceding claims 1-10, characterized in that. Devices for adjustment of the device are available on different sheet sizes. 7618848 12/01/77 - / IS- 12. Device according to one of the preceding claims 1-11, characterized in that the separating tools consist of holding punches (8), expanding fingers (7) and separating pins (5), which are arranged on the rods (22) which can be moved up and down, the holding stamps (8) over large areas Parts of the bow (4) are arranged in order to clamp them when the rod moves downwards, the spreading fingers 7. over through narrow. Bridges connected arch parts are arranged to this when the downward movement of the To separate the linkage by tearing the bridges, and the separation pins over the edge area (especially the Retaining edge (24)) of the bow (4) are arranged in order to separate it when the rod moves downwards. 13. Apparatus according to claim 12, characterized in that a Sensor (9) is provided on the linkage (2ä), which in is able to measure the pressing pressure when separating. 14. Apparatus according to claim 13, characterized in that the device for adjusting the height of the cutting table ES / jn 3 7618848 12/01/77