EP2228182B1 - Method of creating pre-trimmed stacks using a guillotine - Google Patents

Abstract

The method involves inserting movement of the output stack (23) by moving equipment (12) below a cutting knife of a cutting machine, and separating the output stack in multiple partial stacks. Multiple partial stacks are pushed back below the cutting knife by another moving equipment. Multiple partial stacks are adjusted at a rear table (9) for forming a rectangular common stack.

Description

The invention relates to a method for producing utility stacks by cutting transverse and longitudinal starting stacks formed from a plurality of sheets by means of a single planing machine.

In practice, it is often necessary to further process stacks of leaflet stock output from a printing press, particularly stacks formed from individual printed paper sheets. These present in cuboid large-sized stack, which are referred to in the aspect of the present invention as an output stack, are usually before cutting the cutting end products forming sub-stack, hereinafter referred to as benefits stack to trim at the edge to a cuboid edge-trimmed output stack defined edge lengths to create. This pruned at all four edges or pages output stack is referred to in the context of the present invention as edge trimmed output stack. This is now to cut in one direction several times, with each cut creates a partial stack. Optionally, after the respective utility cut, in which the partial stack is separated, an intermediate cut in the sense of EP 0 056 874 A2 be made before the next benefit cut is made. This intermediate cut is used for precise, edge-precise cutting, without the risk of cutting, for example, in label prints of each sheet. In this intermediate cut waste is disposed of, for example, as in the EP 0 056 874 A2 is described. After cutting the edge-trimmed starting stack in a direction to form a cuboidal stack in accordance with the terminology of the present invention, this total stack is rotated 90 ° and then cut again, producing a plurality of sub-stacks at each benefit cut to form a total utility stack.

The starting stack, in particular edge-cut starting stacks, is consequently cut several times in the transverse direction and subsequently cut several times in the longitudinal direction, whereby the intermediate cuts described can be made next to the useful cuts even in the case of the longitudinal section following the cross-section. At the end of the cutting process, the formed from a plurality of sub-stack cuboid Gesamtnutzenstapel represents in the sense of the terminology of the present invention.

In practice, in the described cutting process with transverse and longitudinal cutting of the edge-trimmed starting stack two planing machines are used whose cutting planes are arranged at a right angle to each other, so that after cutting the edge-trimmed starting stack by means of the first plan cutting machine formed from the various part stacks cuboid total stack without turning it, fed to the other plan cutting machine and then cut by means of this plan cutting machine. Here, the total utility stack formed from the plurality of sub-stacks is generated. Such a method is for example in the EP 0 242 762 A2 described.

It has also become known to convert a border-cut cuboid starting stack by means of a single plan cutting machine by transverse and longitudinal cutting into a total utility stack formed from a plurality of sub-stacks. Insofar is on the EP 0 453 935-A1 directed. There, the edge-trimmed starting stack resting on a rear table of the plan cutting machine is advanced by means of a feed saddle of the plan cutting machine, and the trimmed starting stack is cut by means of the cutting knife to form the part stacks. These sub-stacks are advanced to a front table of the plan cutting machine and from there placed on a transport pad, which is positioned on a side of the plan cutting machine arranged table. The partial stacks are rotated in the longitudinal direction when moving on the transport base or together with the transport base or after removal from the transport base from the transverse direction. After removal from the transport underlay resting on the back table sub-stack, which form aligned a cuboid overall stack, advanced by means of the feed saddle and the total stack separated into the plurality of sub-stacks.

This method has several disadvantages. A major disadvantage is the fact that the good between the transverse and longitudinal cutting on the Transport underlay remains and thus the large-area transport underlay must be moved, which also requires a large table surface to rest. This requires a large-scale periphery of the cutting machine in order to be able to guide the transport underlay around the cutting machine. The requirement of the transport underlay requires that always a stack arrangement must be handled, the size of which essentially corresponds to that of the total stack. A universal handling regarding a stack row, thus a handling of a small format unit, is thus not possible.

Further methods for generating utility stacks by cutting parallelepiped output stacks formed from a plurality of sheets in the transverse and longitudinal directions are shown in FIG DE 195 15 705 C1 and the EP 0 091 714 A1 described. In these, however, find three cutting machines use.

In the EP 1 018 408 A1 a method for cutting stacked, sheet-shaped Good is described, in which a plan cutting machine and a connectable with this mobile straightening station is used for the costs incurred in cutting partial stack. Only when the starting stack present after the edge cuts is subdivided into partial stacks in one direction and these have been rotated by 90 ° in order to subsequently divide them into the small partial stacks, the mobile straightening station is used. It is connected to the planing machine in the area of the front table part, so that a ruler of the mobile straightening station can take over the function of aligning and supporting the part stacks when cutting. The cut partial stacks are then removed by the transverse channel formed between this ruler and another ruler. This happens in particular by means of a pusher.

Object of the present invention is to provide a method by means of a single plan cutting machine, a transverse and longitudinal cutting of a starting stack at very short travel paths of the material to be cut is possible.

• mindestens einmaliges Vorschieben des auf einem Hintertisch der Schneidmaschine angeordneten Ausgangsstapels mittels einer im Bereich des Hintertischs angeordneten Vorschubeinrichtung unter ein Schneidmesser der Schneidmaschine und Trennen des Ausgangsstapels in mehrere Teilstapel,
• Zurückschieben der mehreren Teilstapel unter dem Schneidmesser hindurch mittels einer Vorschubeinrichtung,
• Ausrichten der mehreren Teilstapel auf dem Hintertisch zur Bildung eines quaderförmigen Gesamtstapels,
• mindestens einmaliges Vorschieben des Gesamtstapels unter das Schneidmesser und Trennen des Gesamtstapels in eine Vielzahl von Teilstapel,

wobei nach dem Trennen des Ausgangsstapels in die mehreren Teilstapel und vor dem Vorschieben des Gesamtstapels zur Bildung der Vielzahl von Teilstapel die mehreren Teilstapel gedreht werden, so dass diese Teilstapel senkrecht zu deren Ausgangsposition positioniert sind,

• seitliches Abfördern der bei diesen Schnitten entstandenen Vielzahl von Teilstapel auf einen seitlich der Schneidmaschine angeordneten Aufnahmetisch und Ausrichten der Vielzahl von Teilstapel zur Bildung eines quaderförmigen Gesamtnutzenstapels.

The invention proposes to achieve this object a method for generating benefit stacks by cutting parallelepiped output stacks formed from a plurality of sheets in the transverse and longitudinal directions by means of a single plan cutting machine, with the following features:

• advancing the output stack arranged on a rear table of the cutting machine at least once by means of a feed device arranged in the region of the rear table under a cutting blade of the cutting machine and separating the starting stack into a plurality of partial stacks,
• Pushing back the plurality of sub-stacks under the cutting blade by means of a feed device,
• Aligning the plurality of sub-stacks on the back table to form a cuboid overall stack,
• advancing the entire stack at least once under the cutting blade and separating the entire stack into a plurality of sub-stacks,

wherein after separating the output stack into the plurality of sub-stacks and before advancing the entire stack to form the plurality of sub-stacks, the plurality of sub-stacks are rotated such that these sub-stacks are positioned perpendicular to their home position,

• lateral discharge of the resulting in these cuts plurality of partial stack on a side of the cutting machine arranged receiving table and aligning the plurality of sub-stacks to form a cuboid Gesamtnutzenstapels.

It is considered to be particularly advantageous if the starting stack is initially trimmed edge, whereby a randbeschnittener, cuboid output stack is separated into several sub-stacks.

For the purposes of the present invention, it is already sufficient if the stack is cut only once in the transverse direction and only once in the longitudinal direction, resulting in the first cut two cuboid total stack and the second cut from these two total stacks four total benefit stack. As a rule, however, more cuts will be made, at least one cut in the transverse direction and two cuts in the longitudinal direction to produce six total benefit pile.

According to a preferred embodiment of the method according to the invention it is provided that the resulting when cutting the output stack several partial stack are abfördert on an arranged in front of the rear table turntable and arranged on the turntable a plurality of partial stacks are rotated by the turntable by said angle, so that these partial stacks are positioned perpendicular to the initial position on the turntable, further arranged on the turntable arranged several partial stack on the back table and the part stacks are aligned to form the cuboid overall stack.

After separating the output stack into the plurality of sub-stacks and the conveying from the back table to the turntable and turning these multiple part stacks by means of the turntable, in particular by 90 °, the formed plurality of stacks are fed back in the opposite direction to the back table to there, after Alignment of these sub-stacks to form the cuboid overall stack to be cut again several times, so as to produce the plurality of sub-stacks. The plan cutting machine, which can be comprehensively understood, to the effect that the turntable forms part of the plan cutting machine can thus be made very compact due to the very short travel paths of the material to be cut. As a consequence, due to the short travel distances of the product, the desired benefit stacks can be generated in a relatively short time. A device for Implementation of the method can be produced inexpensively due to the compact design.

It thus finds a cutting machine with a back table use, the rear table, seen from the turntable, is located immediately behind the cutting plane of the cutting blade of the cutting machine. The turntable is arranged on the side facing away from the cutting plane of the back table, thus in front of the back table. The turntable can be designed in different ways. Preferably, the turntable on a circular surface for receiving the material to be cut and is embedded in a front table, which is rectangular, thus accommodating the central turntable. The receiving surface of the front table and the turntable are in the same plane. If material to be cut is to be rotated by means of the turntable, which projects slightly outwards beyond the turntable, a mechanism for slightly raising the turntable is provided. After lifting the turntable this is rotated by 90 ° or 270 ° and then lowered back to its original level by the surface of the turntable forms the common plane with the surface of the front table. It is also conceivable that the turntable is designed as a rectangular table, which is first moved away from the back table after picking up the plurality of partial stacks, so that sufficient space is created to rotate the turntable can. Then, the turntable is rotated by preferably 90 ° and moved back in the direction of the back table, so that the gap between the turntable and back table is closed. From the turntable, the plurality of sub-stacks can then be promoted to the back table, for further cutting of the plurality of sub-stacks in the plurality of sub-stacks. Finally, it is quite conceivable that between the turntable and the rear table, a front table is arranged and the turntable is only used when the multiple part stacks are to be rotated. Otherwise, if it is sufficient to produce only the multiple part stacks, these are transferred to the front table and carried away to the side without the turntable is used.

The rotation of the turntable can be different, either clockwise or counterclockwise. Which rotary variant is used depends in particular on the circumstances of the processing of the stacked goods.

The resulting in the cuts several partial stacks are in particular successively conveyed onto the arranged in front of the back table turntable. In particular, they are carried away on the turntable in such a way that the several part stacks form a cuboid overall stack. This can be done by how, how to EP 0 056 874 A2 described, the respective sub-stack is aligned with a ruler associated with the front table.

Preferably, the plurality of partial stacks conveyed away from the turntable onto the rear table are aligned with a feed saddle which is usually used in the plan cutting machine and a side stop of the cutting machine arranged perpendicular thereto. The feed saddle serves to advance the material to be cut under the cutting knife for the purpose of cutting the product.

According to a further preferred embodiment of the method according to the invention it is provided that the plurality of partial stacks are rotated on the back table or a front table of the plan cutting machine, in particular the cuboidal total stack formed from the plurality of sub-stacks is rotated on the back table. This rotation takes place in particular by means of a rotary gripper, which is thus arranged above the support plane of the partial stack on the front table or back table. In particular, the rotary gripper is located in the region of the rear table and serves for rotating the cuboid overall stack, thus rotating the plurality of partial stacks according to their cuboid orientation. If the turning of the goods in parallelepipedal alignment of the total stack, this total stack is exactly arranged after the rotation and can be fed directly by means of the feed saddle the further cutting process. Also in this alternative method The plan cutting machine can be made very compact due to the very short travel paths of the material to be cut. As a consequence, due to the short travel distances of the product, the desired benefit stacks can be generated in a relatively short time. An apparatus for carrying out the method can be produced inexpensively due to the compact design.

In the sense described above intermediate cuts may well be made between benefit cuts and waste strips arising at these intermediate cuts are disposed of. For this purpose, the plan cutting machine is designed in particular in the indicated sense, with the rear table and the front table, which are moved apart to form a gap and waste disposal down and then close again.

In particular, all conveying operations of the material to be cut, be it the starting stack, the plurality of partial stacks or the plurality of partial stacks, are preferably accomplished by pushing the item to be cut. In principle, however, it would be quite possible to use grippers that grasp and transport the cutting material.

The advancement of the plurality of partial stacks and the advancement of the subsequently generated plurality of partial stacks preferably takes place in the same direction. This design contributes to short displacement paths of the material to be cut, thus for compact design of the planing machine and a planing machine having overall system, which has peripheral devices for further processing of the cut Guts.

From the point of view of the handling of the material to be cut, it is considered to be particularly advantageous if all partial stacks are arranged on the turntable or the front table after the separation of the total stack in the plurality of partial stacks and the arrangement of the plurality of partial stacks in total on the lateral receiving table is carried away. Aligning the Variety of sub-stacks to form the cuboid Gesamtnutzenstapels takes place in particular in the area of the receiving table. Here, the receiving table are preferably assigned to each other at right angles arranged alignment stops, whose mutually perpendicular contact surfaces are positioned perpendicular to the receiving surface of the receiving table.

It is also conceivable that the series formed by the plurality of sub-stacks of sub-stacks and / or formed by the various rows of sub-stacks total stack or total utility stack between parallel to Abförderrichtung arranged attacks that are movable towards each other and optionally raised and lowered will be.

From the point of view of the further processing of the total benefit stack, it is considered particularly advantageous if the total utility stack is pushed over from the receiving table to a movable receiving table, from which the total utility stack is stacked onto a pallet or stacked on this, previously formed total benefit stack.

The method according to the invention makes it possible to operate the cutting process when using a single plan cutting machine with optimum utilization of the plan cutting machine. Thus, it is provided in particular that immediately after the separation of the total stack in the plurality of sub-stacks another output stack is fed to the rear table of the plan cutting machine and at least one time moving the output stack for separating the output stack is done in several sub-stacks. Consequently, after the first output stack has been processed, a second output stack can be fed directly to the back table of the plan cutting machine, in order to then possibly cut it to the edge and process it in the sense of the total stack and then the total utility stack.

Further features of the present invention are illustrated in the description of the following figures and in the dependent claims, wherein noted is that all individual features and all combinations of individual features are essential to the invention.

In the drawing of the FIGS. 1 to 19 two variants of the method according to the invention are illustrated with reference to two advantageous device variants, without being limited thereto.

The one device variant is in the FIGS. 1 to 8 , the other device variant in the FIGS. 9 to 19 shown.

It show the FIGS. 1 to 8 in a plan view of a system for Zufördem output stacks to a plan cutting machine, further cooperating with the cutting machine turntable and means for conveying the formed after the cutting operations cuboid Gesamtnutzenstapel.

First, with respect to the basic design of the system for performing the first method variant on the representation of FIG. 1 Referenced:

Shown is a cuboid stack 1, which is formed from individual printed sheets, which are output from a printing press, in particular a sheet-fed press and stacked on a pallet, not shown. From this stack 1, an upper part stack 5 is removed from the total stack by means of a removal device 2, which has a table 3 arranged at a defined height, the table 3, which is provided in the region of its front edge with a drivable takeover roll 4, in the obliquely the Übemahmewalze 4 arranged total stack retracts. As a result, on the table 3 a in the sense of the terminology of the present invention referred to as the output stack 5 stack accepted. This output stack 5 is fed by means of a feed device 6 via arranged next to the table 3 tables 7 and 8 a rear table 9 of the planing machine 10.

In the area of its rear table 9, the plan cutting machine 10 has a feed saddle 12 that can be moved back and forth in the direction of the cutting plane 11 of the plan cutting machine 10 and which is in FIG. 1 is illustrated in its maximum retracted position. In front of the rear table 9 is a front table 14 of the plan cutting machine 10. The rear table 9 serves to receive the material to be cut, the front table 14 of the recording of the cut Guts. In a portal frame 13 of the cutting machine, a pressing bar for clamping the resting on the rear table 9, to be cut Guts and in front of the pressing bar, the cutting blade for cutting the Guts is arranged. Front table 14 and rear table 9 are adjacent to the cutting plane to form a gap apart pushed to dispose of an intermediate cut produced strips of leaflet Guts down through the gap formed can. Subsequently, the gap is closed again.

In the portal frame 13, a rotary gripper is pivotally mounted on the side facing the rear table about a vertical axis, which is illustrated only with respect to its actual gripper element 40 serving to grasp the stack. Shown are two gripper positions of the gripper element 40, namely a first position in which the gripper element engages the stack 23 laterally and can pivot in the direction of arrow A in its other position shown by 90 °.

The reference numeral 15 designates light barriers which ensure that an operator working in the area of the front table 14 on the plan cutting machine 10 can not intervene in the cutting area during the operation of the cutting blade.

In addition to the extent known from the prior art, described plan cutting machine 10, specifically its front table 14, a side table 16 is arranged on which, if the turntable in the inventive method variant using turntable is not needed, stored cut Good can be. The side table 16 directly adjoins the front table 14.

The system comprises the circular turntable 17, which is rotatable in a further table 18 and can be raised and lowered by means not shown. The table 18 has, based on the illustrated plan view of the system, a rectangular contour, wherein the longitudinal sides of the table 18 are parallel to the cutting plane 11. The extension of the table in the direction of its narrow sides substantially corresponds to the diameter of the turntable 17, which is mounted symmetrically in the table 18.

The table 18 can be moved in the direction of the arrows B, as can be seen in the representation of FIG. 8, between a right working position and a left parking position. When formed between the front table 14 and the rear table 9 gap, thus moved away from the rear table 9 perpendicular to the cutting plane 11 away front table 14, the table 18 is positioned with the turntable 17 adjacent to the front table 14. To transfer to the parking position, the table 18 is moved in the direction of the arrow parallel to the cutting plane 11 from the contact area with the front table 14, so that an operator can approach directly to the front table 14 to there, according to the specific purpose of the planing machine 10, cut Good to handle. The table 18 is moved back from its parking position into its working position in the direction of the other arrow B. In the working position, the table 18 is arranged adjacent to another table 19 with a rectangular surface. Parallel to the cutting plane 11, this table 19 on its side table 16 side facing an alignment ruler 20 which is positioned perpendicular to the surface of the table 19 and is horizontally and vertically movable. Accordingly, the table 18 facing away from the longitudinal side of the table 19 is associated with a horizontally and vertically movable alignment ruler 21. The table 19 serves to receive a total utility stack to be discussed in more detail below, which is placed on a pallet or on a pallet by means of a stacking unit 22 arranged next to the table 19. already stacked total benefit pile of identical size and shape is stacked to then supply the stacked total benefit pile of further processing.

• Veranschaulicht ist in den Figuren das Schneiden von zwei Ausgangsstapeln 5. In der Figur 1 befindet sich der zweite Ausgangsstapel 5 noch auf dem Tisch 3, ist somit vom Stapel 1 abgenommen worden, während der erste Ausgangsstapel bereits an seinen vier vertikal angeordneten Seiten, somit an seinem Rand beschnitten worden ist, wie dies für die unterschiedlichen Drehpositionen durch die Angaben "1. Schnitt". "2. Schnitt", "3. Schnitt" und "4. Schnitt" verdeutlicht ist. Das Drehen des Ausgangsstapels 5 erfolgt mittels des das Greiferelement 40 aufweisenden Drehgreifers. Nach dem Randbeschnitt des Ausgangsstapels 5 liegt ein randbeschnittener Ausgangsstapel 23 im Bereich des Hintertisches 9 der Planschneidmaschine 10 vor. Dieser Ausgangsstapel 23 wird mittels des Vorschubsattels 12 unter das Schneidmesser vorgeschoben und es erfolgt ein Trennschnitt, bei dem der randbeschnittene Ausgangsstapel 23 in zwei Teilstapel 24, 25 unterteilt wird. Nach dem Schnitt liegt der Teilstapel 24 auf dem Hintertisch 9 und der Teilstapel 25 auf dem Vordertisch 14 auf. Nach dem Trennschnitt kann gegebenenfalls ein Zwischenschnitt wie zur EP 0 056 874 A2 beschrieben eingelegt werden. Dies bedeutet, dass nach dem Trennschnitt der Vordertisch 14 zur Bildung des Spaltes vom Hintertisch 9 wegbewegt wird, dann der Teilstapel 24 geringfügig mittels des Vorschubsattels 12, wobei dieser in allen Figuren unabhängig von seiner jeweiligen dem Verfahrensschritt zugeordneten Verfahrensposition in seiner hinteren Endstellung veranschaulicht ist, vorbewegt wird, anschließend das Pressen dieses Teilstapels 24 mittels des Pressbalkens erfolgt und dann der Zwischenschnitt vollzogen wird, so dass bei diesem Zwischenschnitt entstehender Schneidgutabfalls durch den Spalt nach unten abgefördert wird. Es wird der Vordertisch 14 gegen den Hintertisch 9 bewegt und der Teilstapel 24 auf den Vordertisch 14 gefördert, insbesondere mittels des Vorschubsattels 12 vorgeschoben.

The method according to the invention is explained below with reference to the representation of the figures:

• Illustrated in the figures is the cutting of two output stacks 5. In the FIG. 1 is the second output stack 5 still on the table 3, has thus been removed from the stack 1, while the first output stack has already been cut at its four vertically arranged sides, thus at its edge, as for the different rotational positions by the information " 1st cut ". "2nd cut", "3rd cut" and "4th cut" is clarified. The rotation of the output stack 5 takes place by means of the gripper element 40 having rotary gripper. After the edge trimming of the output stack 5, an edge trimmed starting stack 23 is present in the region of the rear table 9 of the plan cutting machine 10. This output stack 23 is advanced by means of the feed saddle 12 under the cutting blade and there is a separating cut, in which the edge trimmed output stack 23 is divided into two sub-stacks 24, 25. After the cut, the partial stack 24 rests on the rear table 9 and the partial stack 25 on the front table 14. After the separation cut may optionally be an intermediate cut as for EP 0 056 874 A2 be inserted described. This means that after the separation cut, the front table 14 is moved away from the rear table 9 to form the gap, then the partial stack 24 is slightly illustrated by means of the feed saddle 12, which is illustrated in all figures regardless of its respective process position associated with the method step in its rear end position, is then moved, then the pressing of this sub-stack 24 is carried out by means of the press beam and then the intermediate cut is completed, so that in this intermediate cut resulting Schneidgutabfalls is conveyed through the gap down. The front table 14 is moved against the back table 9 and the partial stack 24 conveyed to the front table 14, in particular advanced by means of the feed saddle 12.

FIG. 1 illustrates that after the cut lying on the front table 14 partial stack 25 by means of a movable parallel to the cutting plane 10 in the direction of arrow C, mounted in the portal frame 13 side ruler 41 and a direction perpendicular to the cutting plane 11 movable in the direction of arrow D front ruler 42 for compliance the cuboid shape of the sub-stack 25 can be aligned.

FIG. 2 illustrates the already promoted to the turntable 17 parallel to the cutting plane 11 Telistapel 25. The conveying of the sub-stack 25 on the turntable 17 takes place at weggefahrenem from the rear table 9 front table 14, thus formed between rear table 9 and front table 14 gap 43, by means of a Vorschublineals 44, which is arranged parallel to the cutting plane 11 and in the direction of the arrow E and opposite is movable. In FIG. 2 the Vorschublineal 44 is shown in a first position in the region of the trailing edge of the front table 14 and in a second position above the turntable 17. Accordingly, the partial stack 24 is promoted according to the illustrated arrow E on the turntable 17, as shown in the illustration of FIG. 3 can be seen. At this time, the second partial stack 5 is already conveyed by means of the feed device 6 in the direction of the planing machine 10 and positioned adjacent to the rear table 9.

As the representation of FIG. 4 can be seen, after turning over the two sub-stacks 24 and 25, thus formed within the meaning of the invention several sub-stack on the turntable 17 this rotated by 90 ° about its vertical axis by 90 °. In the FIG. 4 is a rotated intermediate position and the rotated end position of the two sub-stacks 24 and 25 illustrates, wherein only the end position, the partial stacks are numbered. There are then arranged on the turntable 17 partial stack 24 and 25 in the direction of opposite to the arrow E oriented arrow D by means of the front ruler 42 the back table 9 fed back and aligned the two sub-stacks 24 and 25 on the feed saddle 12 and, in the direction of the arrow F, at a perpendicular to the cutting plane 10 arranged side ruler 26 of the planing machine 10. As a result, the two partial stacks 24 and 25 are in the form of an exactly aligned cuboidal total stack 27.

By means of the feed saddle 12, the total stack 27 is advanced. It will be the in FIG. 5 illustrated first section of the overall stack 27 carried out, then, after aligning the two partial stacks 28 and 29 produced in this section by means of the rulers 41 and 42, the total stack 27 by means of the ruler 44 further in the direction of the front table 14 on the turntable 17 advanced and the second section of the overall stack 27 with aligning and advancing the partial stacks 30 and 31 carried out on the turntable 17, wherein, as the representation of FIG. 7 can be seen, due to the two sections six partial stacks 28, 29, 30, 31, 32 and 33 are formed. These six sub-stacks form the plurality of sub-stacks in the sense of the terminology of the present invention description.

In FIG. 6 illustrates that the first formed sub-stacks 28 and 29 are already promoted in the direction of arrow E on the turntable 17. FIG. 7 shows the additionally promoted on the turntable 17, resulting from the further cut part stack 30 and 31, by means of which the first partial stack 28 and 29 have been further pushed onto the turntable 17. When pushing over the partial stacks 32 and 33 by means of the ruler 44, the partial stacks are pushed 28 to 31 of the sub-stacks 32 and 33 further on the turntable 17, as shown in the illustration of FIG. 8 can be seen.

As soon as, after the cutting of the partial stacks 28 to 33, the feed saddle 12 has moved back into its maximum retracted position, the partial stack 5 arranged adjacent to the rear table 9 is displaced onto the rear table 9 and the above-described edge trimmings take place. At the same time, a new partial stack 5 is removed from the stack 1. The edged, on the rear table 23 located output stack 23 is then, according to the above, first divided into the sub-stacks 24 and 25 and then into the sub-stacks 28 to 33.

Related to the representation of the FIG. 8 are located on the turntable 17 six sub-stacks 28 to 33 according to the arrow F by means of a perpendicular to the cutting plane 11 and movable parallel to the cutting plane 11 movable side ruler 45 (which in turn is shown in two positions) on the table 19, to the table 18th adjoins, carried away and aligned with the alignment rulers 20 and 21, so that there is an exactly cuboid Gesamtnutzenstapel 34 formed from the six part stacks 28 to 33. This total utility stack 34 formed on the table 19 is stacked by means of the stacking unit 22 on the pallet 35 or on the pallet 35 stacked, previously produced total utility stack 34.

During this stacking process, the edge-trimmed starting stack 23 resting on the front table 14 and the rear table 9 of the plan cutting machine 10 is cut to produce the two partial stacks 28 and 30. It thus closes the cutting and Abförderprozess according to the described FIGS. 1 to 8 at.

In the FIG. 8 are for better understanding, the partial stacks 28 to 33 in three different positions - on the turntable 17, on the table 19 and on the pallet 35 - illustrated. Real is the arrangement of the sub-stacks 28 to 33 either on the turntable 17 or the table 19 or the pallet 25 or on the pallet 35 already stored earlier Gesamtnutzenstapel 34th

The FIGS. 9 to 19 show a slight opposite to the system according to the FIGS. 1 to 8 modified plant for carrying out the second process variant according to the invention. Device features of the variant according to the FIGS. 9 to 19 associated with those of the variant according to the FIGS. 1 to 8 to match, are designated by the same reference numerals for the sake of simplicity.

In the following, only those features of the second variant of the device or second variant of the method will be discussed, those of the first variant of the device or variant of the method according to the FIGS. 1 to 8 differ.

Difference of a variant according to FIGS. 9 to 19 to the variant according to FIGS. 1 to 8 is that the device has no table 18 with turntable 17 and the table 19 is not arranged in front of the table 16, but laterally adjacent to the table 16, so that the removal of the partial stack 28 to 33 is not total, but cyclically a partial stack pair, first the partial stacks 28 and 29, then the partial stacks 30 and 31, finally the partial stacks 32 and 33 are conveyed away. This removal is carried out by means of the side ruler 41, after aligning the respective stack pair on the front ruler 42nd

Since no turntable 17 is present, the rotation of the two sub-stacks 24 and 25, after pushing back onto the rear table 9 by means of the front ruler 42 by gripping by means of the described rotary gripper, specifically the described gripper element 40. The table is horizontally and vertically movable, so that the partial stacks 28 to 33 from the front table 14, in a discharge direction parallel to the cutting plane, can be pushed over the table 16 onto the table 19. By means of the table 19, the partial stack stacked thereon can be moved directly over the pallet 35 and stacked on the table 19 total benefit stack 34 by means of the stacking unit 32 on the pallet 35 and a stacked on the pallet 35, already generated earlier Gesamtnutzenstapel 34 stacked.

In detail illustrates the FIG. 9 taking over the output stack 5 on the back table 9 of the plan cutting machine and trimming this Output stack at its four edges, wherein for positioning the output stack this is rotated by means of the rotary gripper 40 about a vertical axis. After the edge trimming of the output stack 5, the edge trimmed output stack 23 is present.

FIG. 10 shows the output stack 2 after the separation in the two sub-stacks 24 and 25th

FIG. 11 clarifies that after the in FIG. 10 illustrated separating section of the front table 14 is moved away from the rear table 9, so that there is a gap 43 between them. The partial stack 25 is aligned, this is illustrated by the side ruler 41 and the front ruler 42. When the gap is open, an intermediate cut, as he used to EP 0 056 874 A1 is described, are inserted.

FIG. 12 illustrates the pushing back of the two partial stacks 24 and 25, after the gap 43 is closed again. The pushing back on the front table 9 in the region of the gripper element 40 by means of the front ruler 42nd

It is then the stack arrangement formed by the sub-stacks 24 and 25, as in FIG. 13 shown by means of the gripper element 40 rotated by 90 °, so that the separation plane between the two sub-stacks 24 and 25 is positioned perpendicular to the cutting plane 11.

Then, as in FIG. 14 shown, the two sub-stacks 28 and 29 advanced by means of the feed saddle 12 and there is the first separation cut with formation of the partial stacks 28 and 29th

FIG. 15 shows that after this separating cut, the gap 23 between back table 9 and front table 14 is opened again and after alignment of the stack formed by the stack of parts 28 and 29 on the rulers 41 and 42nd this pair is pushed over the table 16 by means of the ruler 41 on the table 19. The stack pair is hereby aligned with the ruler 21 of the table 19.

After closing the gap 43, the resting on the rear table 9 and the front table 14 stack assembly is advanced by means of the feed saddle 12 and there is a further separating cut, wherein the partial stacks 30 to 33 are formed. The partial stacks 30 and 31 form a partial stack pair, the partial stacks 32 and 33 another partial stack pair. The situation after the separation cut described is in FIG. 16 illustrated.

FIG. 17 shows that after reopening the gap 43 and aligning the partial stacks 30 and 31 on the ruler 42, the partial stack formed by the sub-stacks 30 and 31 is pushed over the table 16 by means of the ruler 41 on the table 19 on the table 19. Previously, the table has been moved to such a degree in the direction of the stacking unit, that when pushing over the partial stacks 30 and 31 on the table 19, these are positioned immediately adjacent to the partial stacks 28 and 29.

After the gap 43 has been closed, the partial stack pair formed from the partial stacks 32 and 33 is pushed onto the front table 14 by means of the feed saddle, aligned there with the ruler 42 and pushed over the table 16 onto the table 19 by means of the ruler 41. The table 19 has previously been moved further in the direction of the stacking unit 22, so that the partial stacks 32 and 33 are positioned immediately adjacent to the partial stacks 30 and 31. As soon as the partial stacks 32 and 33 are pushed onto the front table 14, the feed saddle 12 returns to its starting position and the next edge to be trimmed stack 5 is fed to the rear table 9 so that it can now be processed in the indicated sense new corresponding cutting cycle followed. This situation is in FIG. 18 illustrated.

After arranging the six partial stacks 28 to 33 on the table 19, this is positioned slightly above the pallet 32 or an already stacked on the pallet 32 Gesamtnutzenstapels 34 and stacked on the table 19 Gesamtnutzenstapel 34 by means of the stacking unit 32.

In the figures illustrating the two variants, for better understanding, the same parts are shown several times in the same figure, in order to better illustrate the process flow through the different positions of the respective part.

Claims (14)

1. Method of creating pre-trimmed stacks by cutting cubic initial stacks, formed from a multiplicity of sheets, in the transverse and longitudinal direction by means of a single guillotine, characterized by the following features:

   - at least once, pushing the initial stack (23) arranged on a rear table (9) of the guillotine (10) forward under a cutting knife of the guillotine (10) by means of a feed device (12) arranged in the region of the rear table (9), and dividing the initial stack (23) into a plurality of part stacks (24, 25),

   - pushing the plurality of part stacks (24, 25) back through under the cutting knife by means of a further feed device (42),

   - aligning the plurality of part stacks (24, 25) on the rear table (9) in order to form a cubic combined stack (27),

   - at least once, pushing the combined stack (27) forward under the cutting knife and dividing the combined stack (27) into a multiplicity of part stacks (28, 29, 30, 31, 32, 33),

   after the initial stack (23) has been divided into the plurality of part stacks (24, 25) and before the combined stack (27) is pushed forward in order to form the multiplicity of part stacks (28, 29, 30, 31, 32, 33), the plurality of part stacks (24, 25) being rotated, so that these part stacks (24, 25) are positioned at right angles to their initial position,

   - conveying the multiplicity of part stacks (28, 29, 30, 31, 32, 33) produced during this cutting laterally away onto a holding table (19) arranged at the side of the guillotine (10) and aligning the multiplicity of part stacks (28, 29, 30, 31, 32, 33) to form a cubic combined pre-trimmed stack (34).
2. Method according to Claim 1, characterized by the following features:

   - conveying the plurality of part stacks (24, 25) produced during the cutting of the initial stack away onto a turntable (17) arranged in front of the rear table (9),

   - rotating the plurality of part stacks (24, 25) arranged on the turntable (17) through an angle by means of the turntable (17), so that these part stacks (24, 25) are positioned on the turntable (17) at right angles to their initial position,

   - conveying the plurality of part stacks (24, 25) arranged on the turntable away onto the rear table (9) and aligning these part stacks (24, 25) to form a cubic combined stack (27).
3. Method according to Claim 2, characterized in that the plurality of part stacks (24, 25) produced during the cutting are conveyed away one after another onto the turntable (17) arranged in front of the rear table (9).
4. Method according to Claim 2 or 3, characterized in that the plurality of part stacks (24, 25) produced during the cutting are conveyed away onto the turntable (17) in such a way that the plurality of part stacks (24, 25) form a cubic combined stack (27).
5. Method according to one of Claims 2 to 4, characterized in that the plurality of part stacks (24, 25) arranged on the turntable (17) are rotated through 90° by means of the turntable (17).
6. Method according to one of Claims 2 to 5, characterized in that after the combined stack (27) has been divided into a multiplicity of part stacks (28, 29, 30, 31, 32, 33), all the part stacks are arranged on the turntable (17) and the arrangement of the multiplicity of part stacks (28, 29, 30, 31, 32, 33) is conveyed away as a whole onto the lateral holding table (19).
7. Method according to Claim 1, characterized in that the plurality of part stacks (24, 25) are rotated on the rear table (9) or a front table (14) of the guillotine (10), in particular the cubic combined stack (27) formed from the plurality of part stacks (24, 25) is rotated on the rear table (9).
8. Method according to Claim 7, characterized in that the plurality of part stacks (24, 25), in particular the cubic combined stack (27), is/are rotated by means of a rotary gripper (40), in particular a rotary gripper (40) arranged in the region of the rear table (9).
9. Method according to one of Claims 1 to 8, characterized in that the initial stack (5) is trimmed at the edge and the edge-trimmed, cubic initial stack (23) is divided into a plurality of part stacks (24, 25).
10. Method according to one of Claims 1 to 9, characterized in that intermediate cuts are made between pre-trimming cuts and waste strips produced during this intermediate cutting are disposed of.
11. Method according to one of Claims 1 to 10, characterized in that the plurality of part stacks (24, 25) conveyed away onto the rear table (9) are aligned on a feed saddle (12) and a side stop (26) arranged at right angles thereto and belonging to the guillotine (10).
12. Method according to one of Claims 1 to 11, characterized in that the actions of pushing the plurality of part stacks (24, 25) forward and of pushing the multiplicity of part stacks (28, 29, 30, 31, 32, 33) forward are carried out in the same direction (B).
13. Method according to one of Claims 1 to 12, characterized in that the combined pre-trimmed stack (34) from the holding table (19) is stacked by means of a stacking unit (22) on a pallet (35) or a combined pre-trimmed stack (34) formed previously and stacked on the said pallet (35).
14. Method according to one of Claims 1 to 13, characterized in that after the combined stack (27) has been divided into the multiplicity of part stacks (28, 29, 30, 31, 32, 33), a further initial stack, in particular an initial stack (5) to be trimmed at the edge, is fed directly to the rear table (9) of the guillotine (10), and the initial stack (5), in particular the edge-trimmed, cubic initial stack (23), is pushed forward at least once in order to separate this initial stack into a plurality of part stacks (24, 25).

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