EP2845825B1 - Scoring device with rotatable transport device - Google Patents

Description

The invention relates to a scoring device for the grooves of flat blanks, in particular sheets of paper, cardboard, cardboard or layer materials. The blanks produced in a preceding step, for example by punching from paper sheets or cardboard sheets, for example, have to be folded, glued and so on in further work steps for producing certain articles, such as brochures or presentation folders. In particular, for folding, it is customary to adapt the blank before the actual folding by appropriate spinning tools, also called scoring tools, at the fold by a linear material displacement such that the bending ability of the blank is improved at the folding.

For this purpose, the creasing device comprises at least one pair of counter-rotating creasing shafts as well as a transporting device comprising transport rollers for transporting the blank from a feeder to the creasing shafts. The transport of the blank takes place in a transport plane and a direction perpendicular to the creasing shafts transport direction. At least one transport roller is drivable. The blank can be pressed onto the transport plane by a hold-down means. Furthermore, the scoring device comprises at least one alignment means extending parallel to the transport direction for aligning a blank edge in the transport direction.

Creasing devices of known type are regularly suitable for solving at least two technical tasks.

First, the grooves themselves, which, for example, by means of corresponding creasing tools, which are arranged fixed in pairs counter-rotating creasing, feasible. The groove shafts can be designed to be driven here. Creasing tools are also referred to as Rillmesser and work against a solid base or die. The scoring tool sits on a scoring shaft and works against the die, which can be a rubber roller, a steel roller or a gap with adjustable mating sleeves.

On the other hand, the feeding of the blank and thus the orientation of the blank edge perpendicular to the scoring tools of great importance. Only thereby can the blank be laterally folded at the fold exactly parallel to the blank edge.

The feed is realized by a transport device upstream of the scraper shafts. This transport device may for example comprise a belt conveyor.

Alternatively, the transport device may comprise, for example, a horizontal arrangement of transport rollers rotatably mounted on both sides, wherein at least one transport roller is drivable. The uppermost generatrices of the cylindrical transport rollers define a transport plane in which the blank can be transported on the transport rollers. The transport direction is perpendicular to the creasing shafts. About an investor reach the rillenden sheets, in the form of the blank, at a defined position either longitudinally or transversely to the transport direction in the transport plane of the transport device. In order to increase the normal force between the blank and the transport rollers, a hold-down means is provided, which extends substantially in the transport direction over the length of the transport device, to during the entire transport path from Feeders to the creasing tools on the creasing shafts to ensure increased frictional properties between blank and transport rollers.

For aligning a blank edge in the transport direction, an alignment means extending parallel to the transport direction is provided. This alignment means is preferably arranged either in one or the other end region of the transport rollers. For aligning is further provided that the axes of rotation of the transport rollers include an angle with the axes of rotation of the creasing shafts in the transport plane. Due to the rotation of the transport rollers in relation to the transport direction and due to the friction between the blank and the transport rollers, the blank undergoes a force transversely to the transport direction, which transports the blank in the direction of the alignment. If a blank edge reaches the alignment means, this force continues to act, so that this blank edge is consequently congruent with the alignment means. Thus, the blank edge is aligned exactly parallel to the transport direction and perpendicular to the creasing shafts.

For aligning the blank different devices are known.

Out DE 10 2007 005 000 A1 For example, a conveyor having a plurality of suction belts is known, wherein one or more of these suction belts form an angle with the remaining suction belts. As a result, the blank is transported transversely to the transport direction to an alignment during transport and created as a result of a blank edge on the alignment.

EP 2 559 549 A1 describes an apparatus for processing sheets of paper or other flat, flexible material, in particular printed products. The Device comprises a feed device for conveying the sheet in a conveying direction with a distance of their leading edges to each other, a folding unit, which is arranged downstream of the feed device, wherein the folding unit is designed as Taschenfalzaggregat. Further, a creasing device is provided, which orientates the sheet before folding and during conveying at the location of the intended fold transversely to the conveying direction. For aligning the sheet comprises a conveyor belonging to the alignment device at least one movable stop on which the sheets are aligned with a distance of their leading edges.

Further disclosed DE 17 86 252 A a folding machine for sheets of paper, cardboard or the like, comprising a folding unit consisting of at least one folding roller pair and a transport device with transport rollers for transporting the blank from a feeder to the folding unit in a transport plane and a direction perpendicular to the folding rollers transport direction, wherein the blank by a Hold-down means can be pressed onto the transport plane. Furthermore, an alignment means extending parallel to the transport direction is provided for aligning a blank edge in the transport direction. The axes of rotation of the transport rollers and the folding rollers include in the transport plane a fixed predetermined, ie non-variable angle.

As mentioned above, can be connected to the grooves further steps, such as folding or gluing. These steps are carried out on a suitable device. This device can do that be designed that the tools required for the steps can be flexibly distributed both in the transport direction and transverse to the transport direction. A disadvantage of the creasing device of known type and folding machines according to

DE 17 86 252 A , Here is that the rotation of the transport rollers is fixed in relation to the transport direction. The blank is regularly transported to the same side transversely to the transport direction and aligned there on the alignment. Due to this, the flexibility of the device downstream of the scorer is severely limited.

The invention is therefore based on the object to provide a creasing device, which is flexible to changing boundary conditions, as they are predetermined, for example, by the subsequent steps or the creative form of the blank is adjustable.

The object is achieved by a scoring device with the features of the independent claim 1. Advantageous embodiments and further developments are specified in the dependent claims.

The proposed creasing device for fluting flat blanks, in particular sheets of paper, cardboard, laminated materials, comprises at least one pair of counter-rotating creasing shafts and a transport rollers comprising transport means for transporting the blank from a feeder to the creasing shafts in a transport plane and a transport direction perpendicular to the creasing shafts. At least one transport roller is drivable. The blank can be pressed onto the transport plane by a hold-down means. Furthermore, the proposed creasing device comprises at least one alignment means extending parallel to the transport direction for aligning a blank edge in the transport direction.

The proposed creasing device is characterized in that the transport device about the vertical axis, i. about the transport plane normal, is rotatable. It can thereby be achieved that the axes of rotation of the transport rollers enclose an angle with the axes of rotation of the corrugation shafts in the transport plane, as a result of which the blank is movable transversely to the transport direction toward the at least one alignment means.

The fact that the transport device is rotatable, it is possible that the blank is transported either to one side or to the other side transversely to the transport direction and aligned there on the alignment. The considered angle is always freely adjustable.

Due to the rotation of the transport device, it is necessary to arrange and align both the alignment means and the hold-down means at the other end of the transport rollers. It is expedient in this case that the at least one alignment means and the hold-down means are arranged movable and fixable above the transport plane.

It is advantageous if the at least one alignment means is arranged on the hold-down means. Due to this arrangement, aligning means and hold-down can be moved and fixed together. For this purpose, for example, a transversely arranged to the transport direction guide rail may be provided, in which the hold-down means is arranged movable and fixable, wherein the alignment means is in turn arranged on hold-down means and consequently moved with and fixed.

In one embodiment of the scoring device can be provided that two alignment means are arranged on the hold-down. The arrangement can take place, for example, a mirror image of the hold-down means, wherein however, only one first alignment means is located in a working position in which a blank edge can be aligned with this alignment means, while the blank can be transported under the second alignment means located in a rest position.

The at least one alignment means can be moved back and forth, for example, by selectively raising and lowering between the working position and the rest position. In a further embodiment of the invention it is provided that the at least one alignment between the working position and the rest position movable back and forth, for example, hinged, so that the movement of the blank transverse to the transport direction obstructed by the at least one alignment in the working position and in the Rest position is not hindered.

According to the invention, the angle enclosed by the axes of rotation of the transport rollers and the axes of rotation of the creasing shafts in the transport plane is freely adjustable. However, it may be expedient that the transport device is rotatable in a grid, wherein the grid is 3 ° in one embodiment. So can be set in a simple manner with changing orientation of the transport again the same boundary conditions.

In a further embodiment of the invention it is provided that the transport device is rotatable in a grid, wherein the grid is arranged so that the transport rollers are aligned in a grid setting parallel to the creasing shafts. This arrangement is advantageous for so-called accidents, which denote occasional printed matter, such as brochures, leaflets, timetables, letters, invitations or other.

To increase the frictional force between the transport rollers and the blank, it is advantageous that each of the hold-down means balls are individually rotatably supported, wherein the balls are arranged so that in each case one ball corresponds to a transport roller and the ball with the corresponding transport roller can be brought into contact. Due to the weight of the balls, the required frictional force is easily adjustable. For this purpose, balls can be designed, for example, with different densities. The fact that the balls are rotatably mounted, the friction between the ball surfaces and the blank can be minimized, which would counteract the aforementioned friction force.

Since the creasing device can be preceded by another device for subsequent work steps, it is expedient for the creasing device to have transport means, so that the creasing device can be moved. These transport means are preferably designed as wheels or rollers, with some wheels or rollers can be performed braked. Thus, it is possible to move the entire scoring device away from the downstream device, for example, to perform maintenance or to place the feeder directly on the downstream device because a scoring device is not needed for a next production job.

Fig. 1

eine erfindungsgemäße Rillvorrichtung mit einer in Transportrichtung nach rechts verdrehten Transporteinrichtung zum Ausrichten eines Zuschnitts an dessen in Transportrichtung rechter Zuschnittkante,

Fig. 2

eine erfindungsgemäße Rillvorrichtung mit einer parallelen Anordnung von Transportwalzen und Rillwellen,

Fig. 3

eine erfindungsgemäße Rillvorrichtung mit einer in Transportrichtung nach links verdrehten Transporteinrichtung zum Ausrichten eines Zuschnitts an dessen in Transportrichtung linker Zuschnittkante und

Fig. 4

eine isometrische Ansicht der Rillvorrichtung.

The invention and its technical advantages will be explained in more detail with reference to an embodiment. Show

Fig. 1

a creasing device according to the invention with a transport device twisted to the right in the transport direction for aligning a blank at its cut edge in the transport direction,

Fig. 2

a scoring device according to the invention with a parallel arrangement of transport rollers and creasing shafts,

Fig. 3

a scoring device according to the invention with a transport device rotated to the left in the transport direction for aligning a blank at its left in the transport direction blank edge and

Fig. 4

an isometric view of the creasing device.

The Fig. 1 to 4 show one and the same inventive scoring device for the grooves of flat blanks, especially sheets of paper, cardboard, cardboard, laminates or other materials.

The illustrated creasing device according to the invention is adapted to receive a blank 4 from a feeder, not shown, align the blank 4, the blank 4 to supply a scoring tool, the blank 4 to groove and the blank 4 to one of the scoring device downstream, not shown here device further transport. The transport of the blank 4 from the feeder to the downstream device takes place here mainly in the transport direction 3. The rectangular cut blank 4 of the embodiment has four blank edges, a different shape of the blank 4 or a different number blank edges is possible.

For the actual grooves, the scoring device has two pairs of groove shafts 2 arranged one behind the other in the transport direction 3. A pair of counter-rotating creasing shafts 2 are arranged vertically one above the other so that the blank 4 can be transported horizontally through a respective pair of creasing shafts 2. The creasing shafts 2 can be driven electromechanically for this purpose. On each pair of creasing shafts 2 are corresponding creasing tools arranged. The transport direction 3 is perpendicular to the axes of rotation of the groove shafts 2.

The blank 4 is transferred from the feeder at an adjustable position along the transport direction 3 to the creasing device, wherein a transfer transversely to the transport direction 3 in another embodiment is also possible. From the creasing device, the blank 4 is transported further by means of the transport device 1. For this purpose, the transport device 1 has several in the transport direction 3 in succession at both ends rotatably mounted transport rollers 12. At least one transport roller 12 is for this purpose, for example electromechanically driven. The uppermost generatrices of the transport rollers 12 form a transport plane 13, in which the blank 4 is transported in the transport direction 3.

In order to increase the normal force between the blank 4 and the transport rollers 12, a hold-down means 7 is provided, which extends substantially in the transport direction 3 over the length of the transport device 1, in order to increase during the entire transport path from the feeder to the creasing tools on the creasing shafts 2 Blank 4 and transport rollers 12 to ensure. In one embodiment 7 balls are held individually rotatable by the hold-down means. The balls are arranged so that in each case one ball with a transport roller 12 corresponds and the ball with the corresponding transport roller 12 can be brought into contact. The connecting line of the centers of the balls is preferably arranged perpendicular to Rillwellen 2. Due to the weight of the balls, the required frictional force is easily adjustable. For this purpose, the balls can be designed, for example, with different densities. The fact that the balls are rotatably mounted, the friction between the ball surfaces and the blank 4 are minimized. The hold-down means 7 is arranged movable and fixable on a guide rail arranged parallel to the transport rollers 12.

So that grooves can be generated parallel or perpendicular to the blank edges, a blank edge must be aligned exactly parallel to the transport direction 3 and perpendicular to the creasing shafts 2, before the blank 4 reaches the creasing tool. For aligning one of the blank edges in the transport direction 3, a first alignment means 5 and a second alignment means 6 are arranged on the hold-down means 7 and can be moved and fixed with the first alignment means 5 and the second alignment means 6 extending parallel to the transport direction 3. Both the first alignment means 5 and the second alignment means 6 are each independently foldable in two positions. While in the first position a blank edge is aligned with the respective alignment means 5, 6, the blank can be transported under the alignment means 5, 6 when the alignment means 5, 6 are in a second position. The position in which the alignment means 5, 6 are located depends on which blank edge the blank 4 is to be aligned with.

According to the invention it is provided that the transport device 1 is rotatable about the transport plane normal. Thus, the axes of rotation of the transport rollers 12 with the axes of rotation of the creasing shafts 2 in the transport plane 13 include an arbitrarily adjustable angle, whereby the blank 4 is transversely to the transport direction 3 to the first alignment means 5 or towards the second alignment means 6 movable. If the axes of rotation of the transport rollers 12 and the creasing shafts 2 are parallel, the blank becomes exclusively parallel to the transport direction 3 transported. So they are in the Fig. 1 to 3 illustrated configurations of the scoring device possible.

Fig. 1 shows the rotated to the transport direction 3 in the clockwise direction transport device 1, whereby the blank 4 due to the friction between the transport rollers 12 and the blank 4 experiences a force transverse to the transport direction 3. As a result of this transverse force, the blank 4 is transported transversely to the transport direction 3 toward the first alignment means 5. The first alignment means 5 is folded into the position in which a blank edge is aligned congruently with the first alignment means 5. The second alignment means 6 is folded into the position in which the blank 4 can be transported between transport rollers 12 and the second alignment means 6.

Fig. 2 shows the transport device 1 whose transport rollers 12 are aligned parallel to the creasing shafts 2. Both the first alignment means 5 and the second alignment means 6 are both folded into the position in which the blank can be transported between the transport rollers 12 and the first alignment means 5 and the second alignment means 6. As a result, the blank 4 experiences no transverse force, so that it moves exclusively parallel to the transport direction 3.

Fig. 3 shows the conveyor device 1 rotated counterclockwise to the transport direction 3, as a result of which the blank 4 experiences a force transversely to the transport direction 3 due to the friction between the transport rollers 12 and the blank 4. This lateral force is opposite to the lateral force in Fig. 1 , By this transverse force, the blank 4 is transported transversely to the transport direction 3 to the second alignment means 6, which is located on the hold-down means 7 on the other side of the transport rollers 12 as in Fig. 1 , The second alignment means 6 is folded into the position in which a Blank edge is aligned congruent to the second alignment means 6. The first alignment means 5 is folded into the position in which the blank 4 can be transported between transport rollers 12 and the first alignment means 5.

For improved reproducibility, it is provided that the transport device 1 can be rotated in a predetermined pattern. In the individual positions of the grid, the transport device can be fixed. In one embodiment, the creasing device has three positions of the grid, wherein the transport rollers 12 are arranged in the middle position of the grid parallel to the creasing shafts 2. The other two positions of the grid are each arranged at the same angle once in the counterclockwise direction and around the first position of the grid, wherein the angle in this embodiment is 3 °. Other sizes of the grid and more than three locking positions are possible according to the invention, wherein the angle of a grid need not be identical.

By rotating the transport device 1, gaps between the first transport roller 12 and the feeder in the transport direction 3 and between the last transport roller 12 and the creasing shafts 2 are formed in the transport direction 3. These gaps are each closed by means of a transfer plate 8, so that the blank 4 can be transported across the gap.

For easy transport of the creasing device is provided in one embodiment that the creasing device, on wheels, rollers or the like is arranged to be mobile. After alignment with the downstream device, not shown, the creasing device may be fixed by braked wheels relative to the downstream device.

LIST OF REFERENCE NUMBERS

1

transport means

12

transport rollers

13

transport plane

2

scoring shafts

3

transport direction

4

cut

5

first alignment means

6

second alignment means

7

Hold down means

8th

transfer plate

Claims (9)

1. Scoring apparatus for scoring fed flat blanks (4), in particular sheets of paper, board, laminated materials, comprising at least one pair of counter-rotating scoring shafts (2) and a transporting device (1), comprising transporting rollers (12), for transporting the blank (4) from a feeder to the scoring shafts (2) in a transporting plane (13) and a transporting direction (3) perpendicular to the scoring shafts (2), wherein at least one transporting roller (12) is able to be driven and the blank (4) is able to be pressed onto the transporting plane (13) by a holding-down means (7), also comprising at least one aligning means (5, 6), extending parallel to the transporting direction (3), for aligning a blank edge in the transporting direction (3), characterized in that the transporting device (1) is rotatable about the normal to the transporting plane, such that a transporting roller rotation axis encloses an angle with a scoring shaft rotation axis in the transporting plane (13), with the result that the blank (4) is movable transversely to the transporting direction (3) towards the at least one aligning means (5, 6).
2. Scoring apparatus according to Claim 1, characterized in that the at least one aligning means (5, 6) and the holding-down means (7) are arranged so as be movable and fixable above the transporting plane (13).
3. Scoring apparatus according to either of Claims 1 and 2, characterized in that the at least one aligning means (5, 6) is arranged on the holding-down means (7).
4. Scoring apparatus according to one of the preceding claims, characterized in that the at least one orienting means (5, 6) is movable back and forth between a working position and a rest position, such that the movement of the blank (4) transversely to the transporting direction (3) is impeded by the at least one orienting means (5, 6) in the working position and is not impeded in the rest position.
5. Scoring apparatus according to one of the preceding claims, characterized in that the transporting device (1) is rotatable in a grid, wherein the grid is preferably 3°.
6. Scoring apparatus according to one of the preceding claims, characterized in that the transporting device (1) is rotatable in a grid, wherein the grid is arranged such that the transporting rollers (12) are oriented parallel to the scoring shafts (2) in one grid setting.
7. Scoring apparatus according to one of the preceding claims, characterized in that the scoring shafts (2) have exchangeable scoring tools.
8. Scoring apparatus according to one of the preceding claims, characterized in that balls are held in an individually rotatable manner by the holding-down means (7), wherein the balls are arranged such that in each case one ball corresponds to a transporting roller (12) and the ball is able to be brought into contact with the corresponding transporting roller (12).
9. Scoring apparatus according to one of the preceding claims, characterized in that the scoring apparatus has transporting means such that the scoring apparatus is movable.

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