EP1707520A1 - Continuously operating cross cutter - Google Patents

Abstract

Each unwinding station (2a-2e) has a longitudinal cutter (6) that divides a paper web (3a-3e) into two paper webs (3'a-3'e) that are sent by a diverting mechanism (7) to a common haulway (5). A leveling station (8) in the haulway maintains the paper webs at a common level. A transverse cutting mechanism (9) cuts the paper webs into paper sheets which are isolated from the paper webs in a collecting station (11), lined up in parallel and then aligned. The paper sheets thereby come out of the collecting station separately. An independent claim is also included for the production and stacking method for differently colored paper sheets.

Description

The invention relates to a continuous cross-cutting machine for paper sizes with several unwinding stations for each paper roll, each unwinding station is associated with a longitudinal cutting unit for dividing the paper roll into two webs with the width of the paper roll halved width, with a common conveying path for all paper webs, to the Abwickelstationen are arranged transversely aligned, wherein deflection means are provided for the transverse deflection of the paper webs from the unwinding to the conveyor line, as well as with one of the conveyor line associated leveling station, where the paper webs are merged to a common height level, with a cross-cutting device for separating the paper webs in paper sheets and with a collecting station, where the continuous paper sheets are stackable to giants.

Continuous cross-cutting machines for paper sizes are well known. A known cross cutting machine has several Unwinding, which can be aligned transversely to a conveying path for the paper webs. Each unwinding station is provided with a paper roll, the paper webs withdrawn, deflected by deflection to the conveyor line and halved beforehand by means of a slitter. The halved paper webs are stacked and fed to the leveling station. There, the paper webs of all unwinding stations arrive at different heights, but approximately one above the other and are brought to the same level in the leveling station, so that all paper webs of the unwinding stations lie substantially flush on top of each other and are conveyed on to the crosscutting device. In the cross-cutting device, the paper webs are cut into sheets of paper, which are then conveyed to a collecting station where they are stacked into stacks, called giants.

In order to be able to form pile of reams in different colors, the different colors are moved one after the other on the cross cutting machine and then the corresponding giant is stacked by hand to the desired color combination and then packaged.

The object of the invention is to provide a cross-cutting machine of the type mentioned, which allows easy stacking different colored giant.

This object is achieved in that the leveling station and the conveyor line comprise guide means which separate the paper webs of the unwinding stations side by side and align the individual sheets of paper webs each unwinding station in parallel predetermined alignment next to each other for each of the unwinding station paper sheets each separate giant to achieve at the collection station. By the invention Solution remain the paper webs each unwinding during the operations within the cross cutting system separated from each other, so that in the collection station a number of adjacent giants is pushed and stacked, which corresponds to the number of paper rolls submitted, This makes it particularly possible at the different unwinding Paper rolls of different colors to submit and remove the differently colored giant at the end of the conveyor line from the collection station in juxtaposed array. The solution according to the invention is suitable for paper size formats, in particular DIN A3, DIN A4 and smaller formats. The cross-cutting machine is advantageous for the processing of several paper rolls provided as a so-called multi-purpose system. The paper rolls are advantageously made of different colors, but can be used in the same way for several, same-colored paper rolls. It is essential that the paper webs of each unwinding station run laterally offset relative to one another, in particular over the entire conveying path in the transverse direction of the conveying path, and thus that the paper webs of each unwinding station also each form their own giant.

In an embodiment of the invention adjacent paper webs are guided overlapping in their edge regions and slitters are provided which cut the paper webs in the overlapping areas to Maßbreite. Although the paper webs are laterally offset from one another side by side. At the same time, however, a slight overlap width is provided in order to create longitudinal edges defined by the slitters. Characterized in that a slitter simultaneously cuts the one edge region of a paper web and the adjacent edge region of the other paper web, the cut longitudinal edges of the adjacent paper webs are then flush and abutting each other during further promotion.

In a further embodiment of the invention, the collecting station is followed by a continuously operating transverse conveyor for sequentially discharging the giant from the collecting station, and the transverse conveyor is assigned a stacking unit in which the giants of their transverse conveying sequence can be stacked one above the other according to reaming blocks. As a result, the giant is mechanically stacked to desired ream blocks without the need for manual stacking. If multi-colored giant blocks, so-called rainbow giant, are to be formed, then the stacking sequence of the superimposed, differently colored giant can be predetermined by the previous generation of the giant in the cross-cutting installation. Because the stacking sequence inevitably corresponds to the order of the giant formed in the collecting station side by side in the transverse direction of the cross conveyor seen. If the stacking takes place from bottom to top, the first ream, conveyed on the transverse conveyor in the transverse direction to the conveyor line, is the lowest ream and the last ream in a corresponding manner the uppermost ream of the formed ream block. Therefore, if in a corresponding Ries block with five different Riesfarben, especially the colors red, orange, yellow, green, blue, the above color red and the underlying color should be blue, so form the red paper webs of the red in a simple way on the cross cutting machine Paper roll and the blue paper webs of the blue paper roll the respective outer side tracks on the conveyor line, so that the giant formed in the different colors can then be removed transversely in the right order on the cross conveyor and brought to the Abstapeleinheit.

In a further embodiment of the invention, the closing unit is followed by a packaging machine in which the ream blocks can be packed. As a result, a machine packaging of the formed Riesblöcke is possible.

In a further embodiment of the invention, the packaging machine is carried out in discontinuous operation and between the stacking unit and the packaging machine, a tact line is provided which performs a synchronization of the supply of Riesblöcke on the power stroke of the packaging machine. As a result, a fully automatic supply of the Riesblöcke formed in the stacking unit is ensured to the packaging machine.

In a further embodiment of the invention, the paper webs are aligned by the deflection and the guide means on the conveyor line, that the juxtaposed giant are arranged at the collection station in the transverse direction of the cross conveyor in an ascending or descending order, that of a predetermined, stacked stacking sequence the giant corresponds to each ream block formed by the stacking unit. This embodiment is particularly advantageous for the stacking of differently colored giant to differently colored ream blocks, which are also referred to as rainbow giant or rainbow giant blocks.

The invention also relates to a method for creating and stacking differently colored giants in a color stacking sequence, wherein in each case sheets of a first color and sheets of an n-th color and sheets of n + 1-th color are simultaneously collected side by side and stacked into a ream , wherein the juxtaposition of the giant is chosen such that a sequence of the differently colored giant viewed transversely to the accumulation direction of the sheets corresponds to the top-down or bottom-upward color stacking sequence. The giants are therefore created and aligned side-by-side so that they subsequently need only be stacked one after another in the transverse direction in a row to produce a desired color stacking sequence of a corresponding one To achieve Riesblockes. Advantageously, the giants are thus stacked in the transverse sequence and form the desired giant blocks. The described method is particularly suitable for the simple creation and stacking of differently colored ream blocks of a plurality of monochrome but relatively different colored giants.

In an embodiment of the method, the multicolor giant blocks formed by the stacking of the giant are subsequently packed. When packaged, the Riesblöcke are ready to ship.

Fig. 1

zeigt in einer Draufsicht eine Ausführungsform einer erfindungsgemäßen Querschneidanlage mit einem an eine Sammelstation anschließenden Querförderer, einer Abstapeleinheit und einer Verpackungsmaschine,

Fig. 2

in vergrößerter Darstellung einen ersten Teil der Querschneidanlage nach Fig. 1 und

Fig.3

ebenfalls in vergrößerter Darstellung einen zweiten Teil der Querschneidanlage nach Fig. 1,

Fig. 4

in vergrößerter, schematischer isometrischer Darstellung eine Förderfolge von Riesen zwischen einer Sammelstation und einem Querförderer unter Überfahren einer Abstapeleinheit und

Fig. 5

in einer Darstellung ähnlich Fig. 4 die Bewegungsfolge von Riesen zwischen Sammelstation, Querförderer und Abstapeleinheit für die Ausführungsform nach den Figuren 1 bis 3.

Further advantages and features of the invention will become apparent from the claims and from the following description of a preferred embodiment of the invention, which is illustrated by the drawings.

Fig. 1

shows a plan view of an embodiment of a cross-cutting machine according to the invention with a subsequent to a collecting station cross conveyor, a stacking unit and a packaging machine,

Fig. 2

in an enlarged view, a first part of the cross cutting machine according to Fig. 1 and

Figure 3

also in an enlarged view a second part of the cross cutting machine according to FIG. 1,

Fig. 4

in an enlarged, schematic isometric view of a conveyor train of giants between a collecting station and a cross conveyor while driving over a Abstapeleinheit and

Fig. 5

in a representation similar to FIG. 4, the sequence of movements of giants between collection station, cross conveyor and stacking unit for the embodiment of Figures 1 to 3.

A cross-cutting machine 1 according to FIG. 1 is used to create Papierkleinformaten and is constructed five useful. The cross-cutting installation 1 comprises a rectilinear conveying section 5, which will be discussed in more detail below. The conveyor line 5 are on opposite sides - corresponding to the number of benefits - a total of five unwinding 2a to 2e assigned, in each of which a paper roll 3a to 3e is presented. All paper rolls 3a to 3e have mutually different colors. The unwinding stations 2a to 2e are delivered to the conveyor line 5 in such a way that an axis of rotation of the paper rolls 3a to 3e runs parallel to a longitudinal axis of the conveyor line 5. The unwinding stations 2a to 2e are thus orthogonal to the conveying path, i. transversely assigned. In the conveying direction of the conveying path 5, two unwinding stations 2a, 2b are arranged on the left of the conveying path 5 and three unwinding stations 2c to 2e on the right of the conveying path. Each unwinding station 2a to 2e is provided in a basically known manner with a drive and a brake for a defined unwinding of the respective paper reel 3a to 3e. In addition, each unwinding station 2a to 2e has roller and dancer arrangements over which the endless paper web drawn off from the respective paper roll is guided. On the output side of each unwinding station 2a to 2e, each paper web is assigned a longitudinal cutter 6, which bisects the respective paper web along its length, so that two paper webs 3'a to 3'e are produced for each paper roll 3a to 3e.

In the area of the conveyor line 5, each unwinding station 2a to 2e is assigned deflection means 7, which divert the two paper webs 3'a to 3'e of each unwinding station 2a to 2e by 90 ° in the conveying direction of the conveyor line 5. At the same time the deflection means 7 for each unwinding station 2a to 2e formed so that the two paper webs each unwinding station are placed exactly on top of each other. For each pair of paper webs 3'a to 3'e formed in this way, a separate conveying track is created by the deflecting means 7 and unspecified guiding means in the area of a subsequent leveling station 8, all five conveying tracks lying parallel to one another on the conveying path 5. For the sake of simplicity, each pair of paper webs will hereinafter be referred to as paper web 3'a to 3'e. The paper web 3'a forms - seen in the conveying direction - a left outside lying paper web. To the right, the paper web 3'b connects to the unwinding station 2b. A middle paper web 3'c is formed by the paper web 3'c of the unwinding station 2c. To the right, following the middle paper web, the paper web 3'd is provided. The paper web 3'e lying on the left outer side of the paper web 3'a is formed from the unwinding station 2e. The paper webs 3'a to 3'e are conveyed between the respective unwinding station 2a to 2e and the leveling station 8 at different heights. Due to the fact that all five webs 3'a to 3'e are conveyed laterally offset from one another, it is also possible in principle to convey all paper webs 3'a to 3'e already at the same height at the leveling station 8. The leveling station 8 is provided with unspecified guide means which align the paper webs 3'a to 3'e parallel to each other and at the same height to each other. In this case, the guide means are designed so that the mutually adjacent paper webs 3'a to 3'e overlap each other in their lateral edge regions.

In the conveying direction behind the leveling station 8, a longitudinal cutting device L is provided, which cuts the side edges of the paper webs 3'a to 3'e to measure. Since the adjacent paper webs 3'a to 3'e overlap one another in their edge regions, a longitudinal cutting element is provided for every two overlapping edge regions of the paper webs 3'a to 3'e in order to simultaneously cover the two overlapping ones To cut edge areas. The individual longitudinal cutting elements are spaced apart according to the dimensional width of the paper webs 3'a to 3'e.

The paper webs 3'a to 3'e are conveyed continuously continuously and at identical conveying speeds. After the longitudinal cutting device L, all the paper webs 3'a to 3'e pass through a common cross-cutting device 9, in which the paper webs are cut into paper sheets in the respective desired small paper format. Paper webs 3'a to 3'e are preferably cut into DIN A4 sheets. In the subsequent in the conveying direction to the cross cutting device 9 area of the conveyor line 5, a braking distance 10 is provided, which merges into the collecting station 11. Here, the continuously fed paper sheets of each paper web 3'a to 3'e are gradually pushed together and stacked in the area of the collecting station 11 into giants. As can be seen from FIG. 5, for the sake of simplicity, the giants have received the same reference numerals as the associated paper webs 3'a to 3'e.

The cross-cutting device 9 is assigned in a basically known manner a drive device which drives guiding and conveying rollers in order to enable an exact preference of the individual paper webs 3'a to 3'e.

Each unwinding station 2a to 2e is associated with a hydraulic control unit S for a drive control of the respective unwinding station 2a to 2e. In the withdrawal direction of the respective paper roll 3a to 3e, each control unit S is arranged at the respective unwinding station 2a to 2e on the left. In an embodiment of the invention, not shown, it is possible to arrange the control units S of adjacent unwinding stations 2a to 2e mirror-symmetrical to one another. This makes it possible, the unwinding 2a to 2e closer and thus more compact to each other set up because the accessibility to the respective control unit S is not given between the two adjacent unwinding, but in each case on the opposite sides of the unwinding.

Transverse to the conveying direction of the conveying path 5 connects to the collecting station 11, a cross conveyor 12. The transverse conveyor 12 transports the giant 3'a to 3'e formed at the collecting station 11 continuously transversely to the conveying direction of the conveying path 5, wherein the five giants 3'a to 3'e adjacent to the collecting station 11 by means of the transverse conveyor 12 in FIG one row behind the other. As can be seen with reference to FIG. 5, the ridge 3'e on the right-hand side is the foremost ream and the ram 3'a on the left-hand side is the last ream.

The cross conveyor 12 transports the giant 3'a to 3'e preferably groups in accordance with the number of benefits to a stacking unit 13, where each five giant 3'a to 3'e stacked and transported as Ries block according to FIG. Each formed ream block is assigned by means of a cycle 14 to a packaging machine 15 in which each ream block is packaged by a paper or foil package. Subsequently, the packaged Riesblöcke be led out of the packaging machine 15 and can be stored, further packed or shipped.

The cycle 14 is adapted to the discontinuous packaging machine 15 such that synchronized clocked a supply of Riesblöcke depending on the availability of the packaging machine 15 takes place.

Since the five-useful cross-cutting machine 1 is occupied by five different-colored paper rolls 3a to 3e, run at the collecting station 11 respectively five different colored giant, which are then brought together as a group of five giants in the Abstapeleinheit 13 to the multicolor Ries block.

As an alternative to the presentation of narrow paper rolls 3a to 3e at each unwinding station 2a to 2e, the unwinding stations 2a to 2e are also adapted to receive wide paper rolls 4. For the wide paper rolls 4 are shown dash-dotted deflection 7 associated with each unwinding 2a to 2e. In this embodiment, the paper webs of the paper rolls 4 are not guided side by side, but rather one above the other on the conveying path 5 and cut on each other on the longitudinal cutting device L and the subsequent cross-cutting device 9 in the desired paper sizes. The rolls of paper must be of the same color, so that in each case the same color giant are formed in the collecting station 11. In the embodiment with wide paper rolls 4, only four unwinding stations 2a, 2b, 2d, 2e are loaded. The fifth unwind station 2c is disabled for this embodiment, but in another embodiment can also be brought into service. Since the paper webs withdrawn from the four paper rolls 4 have the width of the five narrow paper webs 3'a to 3'e according to the embodiment according to FIG. 1, a five-cutting cross-cutting machine 1 nevertheless results because the longitudinal cutting device L forms all the paper webs of the paper rolls 4 to form of five partial webs can cut simultaneously. The transverse conveying takes place in this embodiment according to FIG. 4 while passing over the stacking unit to the packaging machine. Alternatively, the stacking unit can also be dismantled in this embodiment. Then there is a direct transverse feed to the packaging machine. This is symbolized by the schematic representation of FIG. 4.

Claims (10)

Continuous cross-cutting machine for small paper sizes with several unwinding stations (2a to 2e) for one paper roll (3a to 3e), each unwinding station having a longitudinal cutting unit (6) for dividing the paper roll (3a to 3e) into two paper webs (3'a to 3 ') e) is associated with the width of the paper roll halved width, with a common conveying path (5) for all paper webs (3'a to 3'e), to which the unwinding stations (2a to 2e) are arranged transversely aligned, wherein deflection means (7 ) are provided for the transverse deflection of the paper webs (3'a to 3'e) from the unwinding stations (2a to 2e) to the conveying path (5) and to a leveling station (8) which is associated with the conveying path (5) and at which the paper webs ( 3'a to 3'e) can be brought together to a common height level, with a cross-cutting device (9) for separating the paper webs into paper sheets and with a collecting station (11) on which the continuously produced paper sheets n to giants (3'a to 3'e) are stackable, characterized in that the leveling station (8) and the conveying path (5) comprise guide means which guide the paper webs (3'a to 3'e) of the unwinding stations (2a to 2e) separated lead next to each other and align the separated sheets of paper each paper unwinding each side in parallel and predetermined alignment next to each other for each of unwinding (2a to 2e) emerged sheets of paper to achieve separate giant at the collection station. Cross-cutting installation according to claim 1, characterized in that adjacent paper webs (3'a to 3'e) are guided in an overlapping manner in their edge regions and that longitudinal cutters (L) are provided are that cut the paper webs in the overlapping areas to Maßbreite. Cross-cutting installation according to claim 1, characterized in that connected to the collecting station (11) is a continuously operating transverse conveyor (12) for sequentially discharging the giant (3'a to 3'e) from the collecting station (11), and that the transverse conveyor ( 12) is associated with a stacking unit (13), in which the giant of their Querförderreihenfolge are stacked according to Riesblöcken one above the other. Cross-cutting installation according to claim 3, characterized in that the stacking unit (13) is followed by a packaging machine (15) in which the ream blocks can be packed. Cross cutting plant according to claim 4, characterized in that the packaging machine (15) is carried out in discontinuous operation, and that between the stacking unit (13) and the packaging machine (15) a tact line (14) is provided, which synchronizes the supply of Riesblöcke performs the power stroke of the packaging machine (15). Cross-cutting installation according to claim 1, characterized in that the paper webs (3'a to 3'e) can be aligned on the conveying path (5) by the deflecting means (7) and the guiding means such that the giant lying next to one another at the collecting station (11) seen in the transverse direction of the transverse conveyor (12) arranged in an ascending or descending order, which corresponds to a predetermined, stacked stacking sequence of the giant in each by the stacking unit (13) formed Riesblock. A method of creating and stacking differently colored giants in a color stacking sequence, wherein respective arcs of a first color and arcs of an nth color and arcs of an n + 1th color are simultaneously juxtaposed and stacked into a ream, the juxtaposed ones Stringing of the giant (3'a to 3'e) is chosen so that a sequence seen at right angles to the accumulation direction of the sheets of the differently colored giant corresponds to the color stack sequence seen from top to bottom or from bottom to top. A method according to claim 7, characterized in that the giants are stacked in the transverse order. A method according to claim 8, characterized in that the multicolored blocks of Ries formed by the stacking of the giant are packed. Apparatus for carrying out a method according to claim 7, characterized in that a cross-cutting system according to claim 1 is provided, that at the collecting station (11) a transverse conveyor (12) for conveying the giant from the collecting station (11) one after the other follows, and that the Cross conveyor (12) is associated with a stacking unit (13), in each of which a ream block is formed from the number of in the collecting station (11) each adjacent giant, in which the corresponding number of giants in their order seen in the transverse direction is stacked.

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