EP1112952B1 - Device for the continuous folding of flat material - Google Patents

Abstract

The folder for printed sheets (14) in motion comprises rotating blades (7, 8) which are inclined to each other to form a V-shaped gap. As the blades rotate they press against either side of the sheet to produce a central fold. Independent claims are included for: (a) a folding apparatus containing the folder; and (b) a rotary printing machine containing the folding apparatus.

Description

The present invention relates to a device for the continuous folding of flat Material, e.g. Signatures made by a folder in a rotary press is arranged to be cut from a material web.

In GB 2 098 587 A a signature conveying device is in a folder for Rotary printing machines described. Such a device comprises a plurality of adjustable pinch rollers to hold the top bands in place so they are not on a Slide the signature while the signature is moved to a position in which it can be Folding knife is folded onto itself. There is also a mechanism in the device arranged, the force exerted on the rollers to the distances between the upper and lower bands and set the force that the signature between the bands depending on the number of pages or the thickness of each sheet. Because of this arrangement, wrinkles in the signature are avoided if the latter front landing marks contacted, and a shift of the signature before the signature the folding position comes into contact with the folding knife.

The US 3,961,783 shows a folder with an endless with a groove or groove provided band. In this device, a folder comprises an endless one Grooved band that is arranged so that it is along a linear The folding path moves in relation to a second endless belt, which is V-shaped in cross section is. The second endless belt interacts with the groove or groove of the first band, a fold being formed in a sheet of material between the two.

In EP 0 434 987 B1 a folder is described, the one Speed control of the conveyor belts includes. In this arrangement there is a first longitudinally extending deflection element on a first side of the fold line arranged and extends from the entry area to the exit area of the Folder to the sheet material behind an area on the first silk of the fold line to deflect in a first direction as it moves from the entrance area to the Output area of the folder moved. A second longitudinal one Deflection element is arranged on the second side of the fold line and extends from the entry area to the exit area of the folder to insert sheet material into a Deflect the area on the second side of the fold line. The first and the second Deflection elements have deflection surfaces that are larger when viewed in the transport direction become.

A first band arrangement is at least partially between the first and the second Deflector arranged, which grips the sheet and in a direction away from the Entry area to the exit area of the folder. It is also a second Belt arrangement at least partially between the first and the second Deflection device arranged for gripping the sheet material while it is from the first belt assembly held and moved to the exit area of the folder becomes. In this way, the second belt arrangement can grip the sheet material and it along the first and second arrangements away from the first belt arrangement on the Output area of the folder to move after the sheet material from the first Band arrangement was separated.

Driving means are at least one of the belts of the first or second Belt arrangement assigned so that the running speed can be adjusted. On The first control signal generator is provided which provides a first speed control signal generated, which is a function of the speed of the first belt assembly the second control signal generator is provided, the second Speed control signal generates a function of the running speed at least one band in the second band arrangement. Then there is another one Control device provided for comparing the first with the second Speed control signal and to control the operation of the drive means to the Running speed of at least one of the belts in the belt assembly in response to a change in the relationship between the first and the second Set speed signal.

In general, sword folding devices as described in GB 2 098 587 have one Speed limit, so usually for the operation of a Rotary printing machine two sword folding devices are needed. Based on these Restrictions often need aids such as deflection, braking or Integration devices are included in the folding arrangement. This Accessories are not only expensive, but also increase the risk of Folding inaccuracies in the interaction of these auxiliary devices with the Signatures as they go through each and every auxiliary device. This Belt arrangements also take up a lot of space.

A device for folding emerges from document US 2,390, 120. flat Material passes along a direction of transport under rollers, on the periphery of which helical surface sections. The roles are on a shaft, which is arranged perpendicular to the direction of transport, and are rotated correlated to the arrival of the flat material. The helical Surface sections form an opening, the width of which depends on the angle of rotation of the shaft depends. The surface sections contact the outer areas of a feed flat material so that the outer areas are folded and overlap are pressed down, creating two fold breaks.

The invention is based on the object of proposing a device for folding, which enables effective folding.

This object is achieved according to the invention by a device for continuous folding of flat material with the features according to claim 1 solved.

The advantages of the present invention are that when a signature is made one or more layers, through the flattened surface sections of the Folding rollers is guided, a straight fold is formed, the direction no longer must be changed when the signature is stopped to form the fold, as in known sword folding apparatus. By the solution according to the invention Use of sword folding mechanisms with several auxiliary equipment parts dispensable and yet is a longitudinal folding of the signatures in the direction of transport be promoted, possible.

Further advantageous embodiments according to the invention include flattened Surface sections that are flattened to each other to the same extent. Therefore a V-shaped opening narrows between the surfaces on each Rotating body, e.g. a cylinder, are arranged steadily while the cylinder rotates. These flattened surface sections each form the V-shaped opening. The width of the V-shaped opening depends on the angle of rotation of the flattened Surface section. The degree of fold that is on the flat parts, e.g. one or multilayered signatures applied depends on the respective rotation angle of the surface sections which are arranged on the respective cylinder.

The surface sections are arranged and mirrored about a center axis form a three-dimensional spiral, preferably as an Archimedean spiral is formed to form a longitudinal fold on the respective signatures. The order of the flattened surface sections arranged on the surface of the cylinder forms a folding roller.

The folding roller is made of metal or plastic or a mixture of these materials manufactured; other suitable materials are wood or welded construction.

The folding roller, which is essentially spiral-shaped, can consist of one row Brushes with different inclinations exist and can be flattened Have surface sections that consist of guide sections on the surface of the Cylinders are arranged.

Surface sections are assigned to the cylinder, which are arranged in such a way that they fit in Create a vertically folded, longitudinally folded product. At a first Arrangement of the folding rollers, the folding rollers include a central part in which the fold break is arranged around a longitudinal fold during the further rotation of the spiral, preferably an Archimedean spiral. The respective folding rollers can be perpendicular to the direction of conveyance of the flat parts. In another advantageous Embodiment, the folding rollers are aligned so that they are horizontal form an expanding fold on the left or right side, depending on the individual Requirements of the respective print shop.

The folding roller can be arranged so that it has a downward fold on the forms the respective signature to create a folded signature. The folding roller on flattened surface portions arranged in a cylinder may be flattened Surface sections include any angle between 0 ° and 360 ° at a complete rotation of the cylinder. The flattened surface sections can have lay-on sections that allow longitudinal folding of a series of folding signatures.

To the signatures in the middle in the direction of transport To keep a recess that becomes narrower as the folding rollers continue to rotate, and to obtain greater accuracy of the longitudinal fold, folding tapes, Air nozzles, rotating knives or similar elements can be provided to suit each Signature transport path are assigned in the direction of transport.

To make the folding process more effective with those assigned to the cylinder To get flattened surface sections, the folding rollers can be in one Row arrangement may be arranged one by one in an inclined orientation to form a horizontally extending path or below the Signature transport path to fold the signature lengthways on the respective signature spine form.

The dynamic longitudinal folding roller according to the invention can either be used in folders retractable pin assemblies for gripping the multi-layer Signatures can be provided or alternatively the dynamic linear folding rollers in be arranged in a folder without a pin arrangement, at least one of the above specified folders of a web-fed rotary printing press for the commercial or Newspaper printing is assigned.

Further advantages and advantageous embodiments of the present invention are Subject of the following drawings and their descriptions.

Figur 1

eine erfindungsgemäße Falzwalze mit abgeflachten Oberflächenabschnitten, die an der Peripherie des Zylinders angeordnet sind,

Figur 2

einen schrittweise erfolgenden Falzvorgang auf einer Signatur, wobei sich die Falzwalze um die jeweilige Mittelachse dreht,

Figur 3

eine Falzwalze, die in einer Position angeordnet ist, um Längsfalze auf eine jeweilige Signatur aufzubringen,

Figur 4

eine Falzwalzenanordnung, die einem jeweiligen Signaturbeförderungspfad zugeordnet ist, um einen senkrecht nach unten orientierten Falz zu bilden,

Figur 5

eine Reihenanordnung einer erfindungsgemäßen Falzwalzenanordnung,

The drawings show:

Figure 1

a folding roller according to the invention with flattened surface sections which are arranged on the periphery of the cylinder,

Figure 2

a step-by-step folding process on a signature, the folding roller rotating about the respective central axis,

Figure 3

a folding roller which is arranged in a position in order to apply longitudinal folds to a respective signature,

Figure 4

a folding roller arrangement which is assigned to a respective signature transport path in order to form a fold oriented vertically downwards,

Figure 5

a row arrangement of a folding roller arrangement according to the invention,

Figure 1 shows a perspective view of a folding roller according to the invention, wherein on flattened surface sections are arranged on the respective periphery of a cylinder are.

A folding roller 1 according to the invention comprises a rotating body 3, e.g. a cylinder, which is provided with a bore around which the cylinder 3 extends into an arrow 5 displayed direction of rotation rotates. On the respective outer periphery of the cylinder 3 two surface sections 7, 8 are arranged, between which a V-shaped opening 12 is formed. When the folding roller 1 rotates about an axis of rotation 2 in the direction of rotation 5, the V-shaped opening 12 closes by the respective flattened surface sections 7, 8 is formed, gradually / gradually. Therefore the flattened surface sections are rotated around the Center axis 2 rotated so that while a respective signature 14 slides past, which is to be folded lengthways on the respective flattened surface sections 7, 8, the longitudinal fold 17, 24 on the respective signature 14, during a rotation of the folding roller 1 can be formed around its central axis 2 (see e.g. Fig. 3).

In addition, the respective folding roller 1 comprises contact sections 11 for aligning the Position of each signature 14 before being driven during rotation Folding roller 1 is folded lengthways. The respective flattened surface sections 7, 8 are mirrored about a center 6 of a central axis. The respective Surface sections 7, 8 are preferably designed as three-dimensional spirals, particularly preferably as Archimedean spirals on the respective surface of the rotating body 3, e.g. a cylinder are arranged. This cylinder 3 will driven, which is why the central axis 2, which extends through it, a key receiving groove 9.

Figure 2 shows a step-by-step folding process on a respective signature, which is on a folding roller according to the invention is executed.

At the beginning of the folding process 13, the signature 14 is lying flat in front of the Folding roller 1 in position 18. The one to be folded longitudinally around a fold break lies Signature 14 on the contact sections 11 of the flattened surface sections 7, 8. After the signature along its fold break 17 of the schematically shown Folding means 36 has been taken, the broad side 15 of the signature is aligned so that the fold break 17 the respective center of the flattened surface sections 7, 8 equivalent.

In the second position 19, the folding roller 1 is rotated into the Direction of rotation 5 rotated about its respective axis of rotation 2. Accordingly, they are respective flattened surface sections 7, 8 in a slightly raised position been brought up and begin the respective sides of the signature 14 attached to the fold break 17 of signature 14 limit to fold. This movement of the sides of the signature 14 will shown with the folding angle 20, which is less than 180 ° at this stage. The Folding means 36, which are only shown schematically here, hold the center of the signature 14 in central position to the respective flattened surface sections 7, 8 by a Position the fold back of the signature 14 in the middle of the V-shaped opening 12 between the flattened surface sections 7, 8.

In the third position 21, the signatures 14, which adjoin the fold fold 17, are closer towards each other since the flattened surface sections 7, 8 during the rotation of the folding roller 1 perform an upward movement. Hence the pages the signature 14 accordingly brought into an elevated position and move gradually towards one another, the fold fold 17 being gripped by the folding means 36 is shown here only schematically.

The fourth position 23 of the folding process 13 shows the respective folding roller 1, the has been rotated approximately 270 ° and thus a respective longitudinal fold on the signature 14 almost finished. When the folding roller 1 rotates further, the signature 14 is on longitudinal fold extending vertically upward, being in the Transport direction 37 is conveyed and by the respective folding means 36, the Grab fold 17, is held on the groove of the web.

In the end position 25 there is a longitudinally folded signature 24, the respective back of which the folding means 36 has been taken, while the signature 14 in the Transport direction 37 is moved.

In the example described, Archimedean spirals are considered the respective ones flattened surface sections 7, 8 used. However, others can Spiral shapes are used. The flattened surface sections 7, 8 can be made of Metal, plastic or a mixture of both materials; the usage from a welded construction or wooden surfaces is also possible.

The respective folding means 36, the respective fold fold 17 of the signature to be conveyed 14 can take the form of stationary guide rails, air nozzles, brushes, tapes or disc-shaped elements to the respective fold 17 of the Keep signatures 14 on the bottom of the V-shaped opening 12 so that a large one Folding accuracy is guaranteed.

FIG. 3 shows a folding roller arrangement in a position to form a longitudinal fold on a respective signature page.

In this arrangement of the folding process 13, several stages of the folding process are on the respective signature 14 shown. In the illustration shown here, the folding rollers 1 in aligned an upright position to form a fold on the signature 14 which is extends in the horizontal direction. In the starting position, the signature 14 is on the Application sections 11 of the spiral surfaces 7, 8. The signature 14 is around gripped their central axis 35 and is in the joint movement of the folding roller 2 the respective central axis 2 gradually folded in the longitudinal direction, parallel to the Direction of transport, which is provided with the reference numeral 37. The folding angle 20 gradually increases with the further rotation of the flattened surface sections 7, 8 from. Therefore, both sides of a signature 14 are folded towards one another, preferably in same dimensions and fold the back of the signature 14. In the arrangement in Figure 3 is a horizontally extending fold is formed on the left side of the signature. On Longitudinal fold on the right side of the signature is also conceivable.

Figure 4 shows a folding roller arrangement, the respective signature transport path is assigned, with a fold pointing vertically downward being formed on the signature becomes.

The folding roller arrangement according to FIG. 4 is the same as that previously used in connection with FIG. 1 has been described. It is rotated by 180 °, i.e. the folding roller 1 is now above the longitudinal signature 14 to be folded. The fold break 17, which with a vertically after the bottom-facing fold is continuously rotated during the rotation of the folding roller 1 folded around their respective central axis 2. The respective flattened surface sections form a gradual longitudinal fold on the signature 14 when this through the respective Width of the V-shaped opening is moved, the width of the rotational stage of the driven cylinder 3 depends.

When the folding roller rotates about 360 ° about its respective central axis 2 has executed, the fold 24 running vertically downward on the signature 14 formed, the respective open ends of the signature 14, but not here in the Detail is shown, are directed downwards. The signature 14 is from the folding means 36, e.g. a disc, a ribbon, a chain or other elements added to the Keep fold fold 17 aligned in the center in the flattened surface sections 7, 8.

Figure 5 shows an arrangement of the folding rollers in a row.

In this illustration, the folding rollers are arranged in a row and comprise one first spiral 32 and a second spiral 33. The abutting portions 11, which on the The leading edge of a respective signature 14 to be folded lengthwise is in a 90 ° position been turned. The flattened surface sections 7, 8 each Cylinders 3 are assigned, can be designed so that they each angle between 0 ° and 360 ° of the cylinder rotation in the direction of rotation 5 about the central axis 2 run through. This offers a large number of possible folding features or Product sizes to take into account the individual folding requirements, e.g. the Leakage of air when folding a multi-layer web etc.

List of reference numbers

1

folding roller

2

central axis

3

cylinder

4

opening

5

direction of rotation

6

Center of the central axis

7

first flattened surface

8th

second flattened surface

9

key receiving section

10

thickness

11

applying section

12

rotation-dependent V-shaped opening

13

folding

14

signature

14.1

first half

14.2

second half

15

width

16

length

17

Breaking in the fold

18

starting position

19

second position

20

folding angle

21

third position

22

folding angle

23

fourth position

24

longitudinally folded signature

25

end position

26

inclined position

27

second alignment

28

horizontal fold

29

fold pointing vertically downwards

30

Arranged in a row

31

¾ Section

32

first spiral

33

second spiral

34

single spiral

35

direction of rotation

36

folding means

37

conveying direction

38

Stop / bands

39

folding direction

Claims (18)

1. A device for continuous folding of flat material extending in a conveying direction (37) with a driven rotating body (3) for folding which rotates about an axis of rotation (2) arranged perpendicular to the conveying direction (37), and having a periphery with tapered surfaces (7, 8) forming openings having a width which depends on the axis of rotation of the rotating body (3),
   characterized in that the opening is a V-shaped aperture (12) and continuously tapers upon revolution of the rotating body (3) for the purpose of folding, whereby a folding seam (17) of the flat material is held at the bottom of the V-shaped aperture (12) by means of creaser means (36).
2. The device according to claim 1,
   characterized in that the V-shaped aperture (12) continuously tapers such that both sides of the flat material are folded towards each other at the same rate.
3. The device according to claim 1,
   characterized in that the surface sections (7, 8) are each arranged mirrored about a center mid point axis (6).
4. The device according to claim 1,
   characterized in that the surface sections (7, 8) each form two cooperating three-dimensional spirals (32, 33, 34).
5. The device according to claim 4,
   characterized in that the three-dimensional spirals (32, 33, 34) are Archimedean spirals.
6. The device according to claim 1,
   characterized in that the tapered surface sections (7, 8) and the rotating body (3) form a folding roll (1).
7. The device according to claim 6,
   characterized in that the folding roll (1) is made of metal or plastic or a metal/plastic-composite.
8. The device according to claim 6,
   characterized in that the folding roll (1) is made of wood or a weldment.
9. The device according to claim 6,
   characterized in that the folding roll (1) has a series of brushes with varying inclination.
10. The device according to claim 6,
    characterized in that the folding roll (1) has a series of guide rails arranged on the circumference of the cylinder (3).
11. The device according to claim 1,
    characterized in that the rotating body (3) is arranged so as to create a vertically upward oriented longitudinally folded product (14).
12. The device according to claim 1,
    characterized in that the rotating body (3) is disposed oriented in an inclined orientation with respect to the conveying direction (37) so as to create a horizontal fold (28).
13. The device according to claim 1,
    characterized in that surface sections (7, 8) are oriented in a position so as to allow for a vertically downward oriented fold (29) in the flat material.
14. The device according to claim 1,
    characterized in that air nozzles are provided which align the flat material centered towards the V-shaped aperture (12).
15. The device according to claim 6,
    characterized in that a plurality of folding rolls (1) are disposed in a series (30) along the conveying direction.
16. A folder apparatus,
    characterized by
    a device for continuous folding according to claim 1.
17. A pinless folder,
    characterized by
    a device for continuous folding according to claim 1.
18. A rotary printing press,
    characterized by
    a folder according to claims 16 or 17.

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