EP1018410A1 - Method end device for buffering serially arranged cut stacks of sheet material - Google Patents

Abstract

A row of block-shaped stacks formed by an electrostatic blocking process during a cutting stage, is transported into an intake section of a buffer, and from here it is moved into a leveling section, where it forms a unit with previously supplied stack rows. The unit is moved into a discharge section, and combined with any stack rows already contained in this section. The stack row, which is at the front of the unit in direction of transport, is moved to a processing machine.

Description

The invention relates to a method and an apparatus for Buffering rows of cut goods arranged in rows between a cutting station and a further processing station.

A method and apparatus for cutting in stacks present sheet of paper, cardboard, plastic film or the like, especially for cutting collective sheets, is off DE-A-31 01 911 known. There is the device for Cutting designed as a face cutting machine. To ensure, that the stack of knives on the desired dividing lines is cut, the feed of the stack under the Knife be very precise. Already slight shifts to Example of dimensional deviations due to paper warping can lead to that the cut of the knife is no longer at the desired dividing line done, but is shifted from this. Especially at Collection sheets on which a variety of labels are printed , this would result in the individual patterns being cut would. To prevent this, the collecting sheets printed in such a way that the individual patterns are not direct come to rest against each other, but between these distances remain. It is now necessary between the main cutting operations Intermediate cuts should be provided, however due to this procedure cutting into the Patterns no longer possible. Analogously, before cutting trimmed from stacks of their peripheral surfaces. The advantage of this The procedure is to be seen in that after edge cuts have been made the stack to be cut in a defined shape or dimension, which indicates the accuracy of the following Main cutting operations has a decisive influence. - To cut the label becomes the cuboid that is trimmed at the edge Output stacks first in one direction in the sense of the main cutting processes and if necessary the necessary intermediate cuts cut to subsequently, after turning around 90 °, the main cutting operations and any necessary Intermediate cuts in the first cutting direction vertical cutting planes. After 90 ° rotation after each main cut there is a row of piles that fail several, based on the orientation of the cutting knife small cuboid stacks arranged side by side is formed, each stack row also cuboid shape having. These stacks become a processing station fed in, for example, punched or bundled become.

The above-described work sequences at cutting stations clarify that inevitably cuts out discontinuously the cutting station is output. So are for all-round trimming as well as for cutting the large stack of sheets in Strip a few minutes, for example two to three minutes needed and no cut material can be cut during this time be fed to the further processing station. With this would be but continuous processing of the small batches possible, for example to bundle them or irregularly punch out shaped labels, if necessary with subsequent ones Bundling these labels.

In the face cutting machine according to DE-A-31 01 911 the manual series of cuts for each cut moved out of the cutting area of the machine and onto a side table from which the stacks of material to be cut are manually pushed into the Processing station can be inserted.

EP-A-0 242 763 discloses a cutting station consisting of two face cutting machines, in which the second face cutting machine in the production flow generates the row of stacks of material to be cut and an ejector is provided for conveying the row of stacks in the longitudinal direction thereof. In practice, it is known in such a cutting system to push the respective stack row generated during the cutting onto a side table by means of the pusher, which are then pushed directly into a further processing station in which the respective stack is banded.
From DE-U-298 04 929 a multiple bundler with feed slide unit is known. This is used for bundling of batches of batches of batches that consist of individual batches of batches, thus for handling large-sized goods and consequently not for batches.

It is an object of the present invention, both a method as well as a device for buffering arranged in rows Specify stacks of cut material from leafy material, the or which it taking into account the discontinuous mode of operation the cutting station enables the finishing station to be able to operate continuously.

The invention proposes a method for solving this problem according to the features of claim 1. This concerns a special buffering of those incurred for each cut Batch row. The respective stack row is in the entrance area of the buffer and from there a compensation area fed. Depending on the cutting process and therefore the output of further rows of stacks to the entrance area of the Buffers are several rows of stacks in the compensation area of the Buffer accumulated and depending on the needs in the Output area of the buffer further promoted. Are located in this still rows of piles, which are in the exit area conveyed stacked rows combined with these into one unit, on the other hand, directly promoted to the extent that in the conveying direction front stack next to the finishing station can be supplied. While in the exit area located batch rows continuously to the further processing station can be promoted takes place in the compensation area collecting the rows of stacks before the Processing the batch rows in the exit area in the exit area are promoted so that stacks or Batch rows are available for further processing.

Because the stacks formed from individual sheet layers are not easy are to be handled and in particular the risk of slipping of the individual sheet layers should, when buffering the Stack or stack rows as little change of direction as possible to be introduced into the stack rows. Under this Aspect is proposed that the conveying of the batch rows from Entrance area to the compensation area and from the compensation area to the exit area in the same direction. Out For optimal spatial arrangement of the machine part to complete the process, the funding of the Row of stacks from the cutting station to the entrance area in vertical direction for conveying the stack row from the entrance area to the compensation area. Accordingly, it should Conveying the stack rows from the compensation area to the exit area in the vertical direction to convey the stack row from Exit area to the processing station. It is especially thought that conveying the batch row of the cutting station to the entrance area in the opposite Direction for conveying the stack row from the exit area to Processing station takes place.

The stack row or the unit is conveyed in particular by pushing them. It’s so easy and way ensures that the individual stacks are precise in the predetermined positions can be moved. To the to be able to promote the respective stack row particularly easily a special embodiment of the method according to the invention before that the resulting stack row during the respective cutting process is blocked electrostatically. This happens in particular before conveying the stack row into the entrance area of the Buffers. The electrostatic blocking of the respective stack row allows this to be done in different ways promote, for example also by means of conveyor belts that in Active connection with the individual stacks of the stack row are feasible.

When conveying the stack row from the entrance area into the compensation area should initiate the funding movement of the Unity from compensation area to exit area impossible his. This measure must be seen against the background that the conveying movements on the one hand from the entrance area to the compensation area, on the other hand from the compensation area to the exit area overlap in the compensation area.

The one to be conveyed to the further processing station is preferably Row of stacks before conveying to the processing station separated from the adjacent row of stacks. This ensures that when conveying the adjacent rows of stacks to each other there is no relative movement of the individual arches.

The invention also proposes a device for performing of the inventive method before, according to the features of claim 10 is formed.

The conveying bodies are useful as a slide, especially as pneumatically or electrically operated slide formed. While it is the purpose of the second funding body, that of the stacking row output to the cutting station by a defined one To be transported further, so that the next stack row from the Cutting station can be issued, comes the third Funding body the task of several of the second funding body issued rows of piles to promote to the fourth funding body, that each batch row individually to the further processing station promotes. For this purpose, all funding bodies or all sliders, intelligently networked. So are especially means of registration for recording at least the end positions of the conveying paths of the Funding bodies provided. These detection means are, for example designed as light barriers, limit switches etc. The Funding organs or sliders are controlled so that second funding body is not operated when the first Conveyor a stack of rows in the area of the second conveyor pushes and the third funding body then no funding movement into those lying on the table in the compensation area Stack rows can initiate when the second conveyor a Wants to advance stack row. The third funding body may also then not the unit of rows of stacks in the area of fourth funding program, if this is included, the appropriate stack row to the processing station promote.

The can be optimized, especially from a time perspective Funding process if the first and / or third and / or that fourth conveyor can be raised and lowered. Especially with lifting and lowerable configuration of the fourth funding body can do that third conveyor organ already the unit of stacks of material to be cut then advance when the raised fourth funding body is returned to the next batch row to the processing station, which is particularly a punch or a bundle.

The prescribed electrostatic blocking of the respective Row of piles is expediently in the area of the first conveyor element by means of an appropriate device.

Further features of the method according to the invention and the device according to the invention are in the dependent claims Description of the figures and the figures themselves, it being noted that all individual features and all combinations of individual features are essential to the invention.

Figur 1

eine Draufsicht der Puffervorrichtung,

Figur 2

einen Schnitt durch die Puffervorrichtung gemäß der Linie II-II in Figur 1,

Figur 3

einen Schnitt durch die Puffervorrichtung gemäß der Linie III-III in Figur 1, wobei nur wesentliche Bauteile veranschaulicht sind,

Figur 4

einen Schnitt durch die Puffervorrichtung gemäß der Linie IV-IV in Figur 1, wobei nur wesentliche Teile dargestellt sind und

Figur 5

eine Darstellung gemäß Figur 4, wobei eine Stapelreihe von einer Einheit von Stapelreihen abgetrennt dargestellt ist.

In the figures, the method according to the invention and the device working according to the invention are shown using an exemplary embodiment, without being limited to this. It shows:

Figure 1

a plan view of the buffer device,

Figure 2

2 shows a section through the buffer device along the line II-II in FIG. 1,

Figure 3

2 shows a section through the buffer device along the line III-III in FIG. 1, only essential components being illustrated,

Figure 4

a section through the buffer device along the line IV-IV in Figure 1, only essential parts are shown and

Figure 5

a representation according to Figure 4, wherein a stack row is shown separated from a unit of stack rows.

The buffer has a table 1 through an entrance table part 2, a central table part 3 and an exit table part 4 is formed. The table parts 2, 3 and 4 have rectangular Surfaces for receiving the stacks of material to be cut. The entrance table part 2 borders in the area of the longitudinal side 6 adjacent to Narrow side 7 to the central table part 3. The exit table part 4 borders with its long side 8 to the other narrow side 9 of the central table part 3. The entrance table part 2 is in the area its essentially an escape with the narrow side 7 of the central table part 3 forming long side 10 with one over the length of the entrance table part 2 extending side ruler 11 provided that perpendicular to the table surface 5 protrudes, and has a height that is slightly higher than the maximum insertion height of the material to be cut. In levels parallel to the plane of the side ruler 11 is a ruler trained slide 12, which corresponds to the side ruler 11th is formed, slidably mounted in the central table part 3. In the retracted position of the slide 12, which in Figure 1 is illustrated with solid lines, aligned the contact planes of the side ruler 11 and the slide 12. With dashed lines in Figure 1 is the other end position of the Slider 12 illustrates. The slider 12 extends in essentially across the entire width of the central table section 3. In the area of the other long side 13, the central one Table part 3 has a side ruler 14 that extends over the entire Length of the table part 3 and largely across the width of the Output table part 4 extends. The side ruler 14 is designed according to the side ruler 11. In the field of Long side 13 of the central table part is a ruler trained slide 15 movably mounted. The slide 15 is designed in accordance with the slide 12 and its slide level oriented parallel to the slide plane of the slide 12, the slider 15 substantially over the entire length of the central table part 3 can be moved and lifting and is lowerable. The exit table part 4 points in the area of its other long side 16 a parallel to the slider 12 and 15th arranged side ruler 17, which extends over the entire Length of the output table part 4 extends. Parallel to the side ruler 17 is a narrow, perpendicular to the table surface 5 lifting and lowerable slide 18 substantially over the entire length the exit table part 4 movable. The slide 18 is on the side of the side ruler 17 facing the slide 15 arranged and relatively narrow, so that it is suitable is to move a stack row 19 in the longitudinal direction. According to the slide 18, a slide 20 is in the region of the Input table part 2 is provided, which is a short distance from Side ruler 10 can be moved parallel to this by a Stack row 19 to move in the longitudinal direction. Also this slide 20 can be raised and lowered.

The slide 12 is thus exclusively horizontal, that is parallel, movable to the table surface 5. Regarding the Slider 20 is only in contact with the stack row 19th incoming component illustrated. Its means of travel correspond to those described below for the slide 18 are. The traversing means are in the sense of the functional sequence controlled when buffering the material to be cut, whereby also it is possible to record their end positions. The Ruler 12 is connected to two guide rods 21 and 22 that enforce stationary bearings 23 and 24. The piston rod 25 a stationary pneumatic cylinder 26 engages on Slider 12 on. The control of slide 20 and slide 12 is networked in such a way that when the slide 20 is moved Direction of the central table part 3 a movement of the slide 12 is excluded or when moving the slide 12 Movement of the slide 20 in the direction of the slide 12 excluded is.

A plate-shaped slide holder 27 that is parallel to the table surface 5 is arranged, takes the slide 15 in the area its top edge. In the area of the long side 13 of the central table part 3 are in the longitudinal direction of this table part two guide rods 27 and 28 stored in table 1, one Take up carriage 30, the vertically oriented bearings 31 and 32 has, enforce the guide rods 33 and 34, which with the Slider receptacle 27 are connected. In the carriage 30 is a pneumatic cylinder 35 mounted, the piston rod 36 on one of the Slide receptacle 37 attached approach 37 attacks. The car 30 has a thread receptacle 38 which passes through a spindle 39, on. The drive means for driving the spindle for example, an electric motor are not in the drawing illustrated. By moving this spindle, the carriage can 30 in the direction of the guide rods 28 and 29, thus the slide 15, can be moved horizontally by striking the pneumatic cylinder 35 vertical, however, is essential that the spindle 39 and the pneumatic cylinder 35 according to the functional sequence can be controlled during buffering and in particular the Slider 15 can be moved horizontally and vertically intelligently can. Means are to be provided for the horizontal position of the slide 15 at any time, for example about the position of the spindle 39. This against the background that the working areas, more precisely the effective areas, of Slider 12 and slider 15 on the one hand and slider 15 and On the other hand, slider 18 overlap, which will be explained later in Detail is considered.

According to the described storage of the slide 15 to to be able to move it horizontally and vertically is the Slider 18 and the slide 20 mounted. The bearing elements of the Slider 18 that with those of the slide holder 27th are the same for the sake of simplicity Designated reference numbers. With regard to the detailed representation of the Bearing 40 for the slide 18 is otherwise on the illustration of the bearing of the slide holder 27 according to FIG. 2 referred. The slide 18 is, like the slide 15, corresponding the buffer process can be moved intelligently.

From the table of the face cutting machine, not shown in detail is the cut stack row by means of the slider 20 19 to the entrance table 2 and from there to the central one Table part 3 promoted. In this respect, Figure 1 shows a middle position of the slider 20, this slider being shown in FIG Position remains because the subsequent slide 12 the previously conveyed by means of the slide 20 to the slide 12 Stack row 19 has not yet advanced. The respective one is formed by ten individual stacks 42 stack row 19 Actuation of the pneumatic cylinder 26 by means of the slide 12 by a defined dimension in the longitudinal direction of the central table part 3 moves, as can be seen from the illustration in FIG. 1, based on the dashed line of the slide 12 results. Is the stack row 19 has been advanced by this amount, the raised slider 12 retracted and behind the stack row 19, which was generated during continuous cutting, lowered to this last cut partial stack 19th to advance. The next stack row is via the slide 20 19 pushed into the area of the slider 12. This will be again activated, the shifted stack row 19 the last shifted stack row further by means of the slider 12 advances, and this stack row and the other stack rows form a unit. In contrast to the cyclically working Slider 12 comes to the intelligently drivable slider 15 Task to advance the unit 43 from stack row 19, so that the slide 18 is permanently pushed out Stack rows 19 is supplied. If enough rows of 19 from Slider 12 have been advanced and consequently a has formed correspondingly large unit 43, the raised Slider 15 retracted when slider 12 moves back, in an end position 44 according to Figure 3, this only as Marking is to be seen, and in this position the slide 15 lowered behind the unit 43. Then the unit formed advanced by means of the slider 15 and with those rows of stacks 19, which is still in the area of the exit table part 4 and the adjacent area of the central table part 3 are united. This state is shown in Figure 1. So are, for example, four rows of stacks 19 from the slide 15 have been advanced with four still on the table parts 3 and 4 stacking rows 19 were combined. The intelligent operated slide 15 is only then and only so far proceed as the current buffering requires. Become, for example for edge and intermediate cuts, from the cutting machine no stack rows 19 can be output for a long time have the consequence that the slide 18 just the last in Area of the exit table part 4 arranged stack row pushes out and thus the intelligently operated slide 15 the Unit 43 taken over from the area of the slide 12 directly in the area adjacent to the slide 18. Reference number 45 is the intermediate position shown in FIG. 1 the slide 15 illustrates, which is also only as Marking is to be understood. With the reference number 46 is the Position of the slide 18 illustrated.

Figures 4 and 5 illustrate that the slide 18 assigned front stack row 19 not immediately after Moving through the slider 15 by means of the slider 18 is pushed out, but that a separation of this stack row 19th from the adjacent stack row 19 by means of one per se known spiked roller 47 takes place, the individual spikes Push through slots 48 in exit table part 4 and when rotating get down against the individual stacks 42 and their displacement against the side ruler 17 of the exit table part 4 cause. In Figure 1, the slide 18 is in two positions shown, on the one hand, in its retracted position before the this adjacent stack row 19 by means of the spiked roller 17th is separated and on the other hand in an intermediate position in which the stack row 19 fed to a further processing station 49 is processed and some of the stacks 42 are already further processed were.

Figure 1 illustrates that in the area of the entrance table 2 a Device 50 for electrostatically blocking the cut generated stack row 19 is provided. Such a facility is known from the prior art (Segbert GmbH & Co. KG, 48619 Heek, type VBS 95). The respective stack rows 19 are blocked and pushed through the buffer station and shortly before unblocked the output to the further processing station, so that the rows of stacks as a rigid unit through the buffer station can be promoted.

Claims (18)

Method for buffering rows of cut material arranged in rows between a cutting station and a further processing station, the respective stack being formed from leafy material and having a cuboid shape, and the respective row having a cuboid shape formed from various stacks, with the following features: the stack row resulting from the respective cutting process is conveyed into an entrance area of the buffer, from there the stack row is conveyed into a compensation area of the buffer, this stack row forming a unit with previously conveyed stack rows, the unit is conveyed into an exit area of the buffer and combined with rows of stacks possibly located in the exit area of the buffer, the front stack row of the unit in the conveying direction of the unit or the combined unit is conveyed to the further processing station. The method of claim 1, wherein conveying the batch rows from the entrance area to the compensation area and from Compensation area to the exit area in the same direction he follows. The method of claim 1 or 2, wherein conveying the Row of stacks from the cutting station to the entrance area in vertical direction to convey the stack row from Entrance area to the compensation area. Method according to one of claims 1 to 3, wherein the Conveying the stack rows from the compensation area to the exit area in the vertical direction to convey the Row of stacks from the exit area to the processing station he follows. Method according to one of claims 1 to 4, wherein the Promote the stack row or the unit by their Pushing is done. Method according to one of claims 1 to 5, wherein the at The respective batch of electrostatic batches is blocked, especially before conveying in the entrance area of the buffer electrostatically blocked becomes. Method according to one of claims 1 to 6, wherein the Conveying the stack row from the entrance area to the compensation area initiating the conveying movement of the unit from the compensation area to the exit area is impossible. Method according to one of claims 1 to 7, wherein the for Processing stack to be conveyed in front of the stack Convey to the processing station from the neighboring one Stack row is separated. Method according to one of claims 1 to 8, wherein the Punched or punched in the finishing station be bundled. Device for carrying out a method according to one or more of claims 1 to 9, having the following features: a buffer which has a table (1) for receiving the stacks (42), a first conveying element (20) for conveying the stack row (19) resulting from the respective cut in a first direction on the table (1), a second conveying member (12) for conveying the stack row (19) displaced by the first conveying member (20) in a second direction on the table (1) arranged perpendicular to the first direction, a third conveying element (15) for conveying the unit (43) of stack rows (19) or combined unit of stack rows (19) in the second direction on the table (1), the conveying paths of the second and third conveying elements (12, 15 ) overlap, a fourth conveying member (18) for conveying the front stack row (19) in a third direction, arranged perpendicular to the second direction, from the table (1) to a further processing station (49). The apparatus of claim 10, wherein the first and / or second and / or third and / or fourth funding body as Slider (20, 12, 15, 18), in particular as a pneumatic or electrically actuated slide is formed. The device of claim 10 or 11, wherein the first and / or third and / or fourth funding body (20, 15, 18) can be raised and lowered. Apparatus according to claim 11 or 12, wherein the second and third slide (12, 15) in the longitudinal direction and the first and fourth slide (20, 18) in the transverse direction of the table (1) are movable. Device according to one of claims 11 to 13, wherein the second and the third slide (12, 15) essentially across the width of the table part assigned to it extends and has a height that is slightly larger is the maximum height of the stack (42). Device according to one of claims 1 to 14, wherein Detection means for detecting at least the end positions the funding routes of the first and / or second and / or third and / or fourth conveyor member (20, 12, 15, 18) is provided are. Apparatus according to claim 15, that the detection means as Light barrier or limit switches are designed. Device according to one of claims 10 to 16, wherein in Area of the first conveyor element (20) a device (50) for electrostatically blocking those generated during the cut Stack row (19) is arranged. Device according to one of claims 10 to 17, wherein adjacent to the fourth conveyor element (18) parallel to it Conveyor path a spiked roller rotatable in the exit area of the Table (1) is stored in this.

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