EP1072551B1 - Folding method and folding apparatus arrangement in a rotary newspaper printing press - Google Patents

Description

The present invention relates to a folder assembly and method for folding a plurality of printed web cords in a web-fed rotary newspaper press according to the preamble of claims 1 and 10.

In newspaper production is usually a variety of paper webs through several printing units out and one or both sides with a single or multi-colored Picture printed. Subsequently, the printed webs are longitudinally in web strands cut, the a former hopper section with a former or more Are fed to formers in which the web strands are folded longitudinally. Before the Web strands are fed to the formers, they are usually before the Running into the former section and also after leaving the Forming hopper section superimposed by means of guide rollers, so that the desired Pagination and section division of the finished newspaper arises.

After leaving the former section, the stacked and longitudinally folded web strands once more superimposed and a Subordinated folder supplied in which they folded horizontally, in individual signatures be cut and then transported to a mailroom in which the finished newspapers are collected, stacked and made ready for despatch.

In the prior art, former sections typically comprise three Folding funnel pairs of stacking formers and a fixed in the Printing arranged folding machine, the superimposed and longitudinally folded Web strands are supplied. The supply of folded, superimposed Web cords to the folder by means of a variety of each below the Forming rollers arranged guide rollers around which the longitudinally folded, one above the other lying web strands are performed.

The prior art document DE-A-2846191 discloses a folder for Web-fed rotary printing presses, wherein above the fixed folder two rows of each four folders are provided. About each former is a single guided longitudinally stranded, longitudinally folded and at a single point by means of two rolls merged paper strand bundles in the vertical direction of the Einlaufzwickel fed to two cross-cutting rollers of the folder.

DE-A-25 10 057 also describes a folding method and a folder for the Newspaper production whereby paper webs in printing units are printed on both sides and individually, d. h not merged, a former arrangement of upper and lower Falztrichtem and merged a single, including fixedly arranged Folder be fed with folding cylinder. Thus, only one runs over each former single track. The upper formers are inclined to one side down, while the lower formers are tilted down to the other side, i. opposite are aligned so that the merged before the folder webs respectively have an opposite orientation. This causes the folded edges the various sections on opposite sides of the finished product whereby the product has a uniform overall thickness.

From DE-C-554 955 is also a folding unit for rotary printing machines known, with a double-width, printed paper web cut several times and led to the generation of two strands via two juxtaposed former becomes. In a first operating configuration become the two strands of a respective folding and cutting device supplied, which with respect to their inlet gusset between folding and Cutting cylinder is located vertically below the respective folder tip while in one second operating configuration, the two generated strands of a common, centered arranged folding and cutting device are supplied. This will be the two Strands by means of collapsing before Einlaufzwickel between folding and Cutting cylinder combined the common folding and cutting device. By Moving the two folding and cutting devices transversely to the direction of the paper web a transition between the two operating configurations can be achieved.

Further, DE-A-2614665 teaches a folder with one of a kind of cassettes interchangeable folding mechanism, which by means of a lifting device or a Lowered in a vertical direction on a car, replaced and returned to vertical direction can be raised.

Due to the so-called radius effect, which arises from the fact that around a guide roller guided web strands of the outer web strand a larger

Distance from the center of rotation of the roller has, as the inner track, it often happens to wrinkling and other damage to the printed webs that the printed image and thus affect the quality of the newspaper. In particular, there is a risk that the web strands tear, crumple or break due to the different web tension tangle, which also affects the print quality. There is also the danger the greasing of the freshly printed ink on the guide roller or of Shifts of the so-called cut register, which determines the position at which the Web cords are cut crosswise in the folder, leaving a cut-to-size Newspaper arises.

The most important parameters, which is the probability of the above Damage to the printed product are the pagination of the newspapers, the Diameter of the guide rollers, the angle at which the web strands around the Guide rollers are guided, the section length, the number of compiled Sections and the diameter changes of the press or pull rolls or which The web strands lead over the formers or below the former are arranged, as well as the ability of the draw rollers to hold the paper.

One of the main problems during operation of the printing press is that strong wrinkles that can lead to cracks, not just visible Impacts of the printed image, but also paper jams in the Folding apparatus can cause, which inevitably leads to a longer machine stop and can lead to a loss of production of the printing press.

Based on the disadvantages of the prior art, it is an object of present invention, a folding apparatus in a web-fed rotary printing press through which the risk of wrinkling in the printed web strands is reduced.

This object is achieved by the features of claims 1 and 10.

Further features of the present invention will become apparent from the dependent claims.

A folder assembly according to the invention in a web-fed rotary press includes a first former hopper row, a preferably oblique, d. H. with an offset, below the first former hopper row arranged second former series, each with a first, second and third Folding funnels, at which the web strands guided via the former are longitudinally folded, and one below one of the former of the second former row arranged movable folding apparatus, the longitudinally folded web strands after the Leaving the former are fed.

By the arrangement of two former rows and a movable folder, which can be arranged under any desired former of the second former row can, the risk of damage in the printed image, especially wrinkles, cracks, distinct tensions and greasing of the paint significantly reduced.

Furthermore, it has been found that by the folding device according to the invention Displacements of the cut register, d. H. the position of the printed image on the signatures, can also be reduced.

According to a further embodiment of the invention may further preferably below each folder, a variety of guide rollers, collecting rollers or Collating rollers may be provided which the longitudinally folded web strands of the Feed the former of the first and second former rows to the folder and by means of which preferably all folded web strands before entering the Folder be superimposed.

Furthermore, it can be provided that via the former of the first and second Forming hopper row each have a plurality of superimposed web strands in the Way is led that the total number over the Former of the second Former series guided superimposed web strands is greater than the total number of over the former of the first former group guided web strands.

From the fact that a different number of superimposed Web strands can be performed on the former, there is the advantage that more Variations in pagination, d. H. the page layout of the newspaper are possible because four Web strands or half tracks usually form a newspaper section. By a varying number of web strands on each former can be the desired Arrangement of the newspaper sections can be achieved with a higher degree of flexibility. In this context, it has also proven to be advantageous if the total number the superimposed web strands, via the former of the second former series be greater than the total number over the former of the former Folder series guided web strands is, as a result, the wrinkling and other Damage to the printed products can be reduced.

According to a further embodiment of the invention, it may be provided that over at least two of the former of the first former row or the second Forming hopper row a different number of superimposed web strands is guided, and in particular, that two formers of the first former row two superimposed web strands are performed. In this embodiment, the Forming hopper over which most web strands are guided, preferably outside in the first former row (i.e., in its outer area) arranged.

In particular, it has proved to be advantageous if two former of the first Forming hopper row two superimposed web strands and over the third Folding funnels of the first row of formers Four superimposed web strands be guided. Furthermore, the risk of wrinkling can be further reduced thereby that the two formers, over which the two superimposed tracks led next to each other and the third former, over four at the same time lying outboard in the first former row (i.e., in her Outside area) are arranged.

Furthermore, it can be provided that at least two of the former of the second Forming hopper row a different number of superimposed web strands to be led. In this case, the folder is preferably below the folder the second former row arranged over the largest number one above the other lying web strands is guided so that these web strands directly to the folder can be fed without overflowing into the folder before Guide rollers must be performed.

By using a movable folder, the trajectory of the folded Web strands are much easier to change, as the folder easily under the largest number of web strands folding folder can be moved.

According to a further embodiment of the invention are preferably over two Forming hopper of the second former series four superimposed web strands and over the third former of the second former row eight superimposed Web strands, whereby there is still the possibility that the two formers, are guided over the four web strands, are arranged side by side and that Accordingly, the third former, are passed over the eight web strands, outside in the second former row, preferably directly above the movable folder, is arranged.

In a further embodiment of the invention, the former are the first Forming hopper row with respect to the former of the second former row preferably arranged in a line, so that, for example, the tip of a former of the first Forming hopper row and the tip of a former of the second Formers in one lie substantially vertically through the former extending plane.

Alternatively, it may also be provided that the former of the first former row with respect to the former of the second former row in the manner offset from each other are arranged, that the tips of the former of the first former row in the Essentially vertically between two juxtaposed formers the second former hopper row extending planes lie. By such a staggered Arrangement may be the number of guide rollers for the former of the former Forming hopper row leaving, superimposed web strands and, accordingly, the Risk of wrinkling can be further reduced.

The features of the present invention will become apparent in the following description preferred embodiments in conjunction with the attached, below explained in more detail drawings.

Fig. 1

eine schematische Darstellung einer erfindungsgemäßen Ausführungsform einer Zeitungsdruckmaschine;

Fig. 2

eine detailliertere schematische Darstellung der Falzapparatanordnung gemäß der vorliegenden Erfindung mit zwei jeweils drei Falztrichter umfassenden Falztrichter-Reihen, Führungswalzen und einem bewegbaren Falzapparat;

Fig. 3

eine schematische Darstellung der in Fig. 2 gezeigten Falzapparatanordnung in einer ersten Anordnungsweise;

Fig. 4

die in Fig. 2 gezeigte Falzapparatanordnung in einer zweiten Anordnungsweise;

Fig. 5

die in Fig. 2 gezeigte Falzapparatanordnung in einer dritten Anordnungsweise;

Fig. 6

die in Fig. 2 gezeigte Falztrichteranordnung in einer vierten Anordnungsweise;

Fig. 7

die in Fig. 2 gezeigte Falztrichteranordnung in einer fünften Anordnungsweise;

Fig. 8

die in Fig. 2 gezeigte Falztrichteranordnung in einer sechsten Anordnungsweise gemäß der bevorzugten Ausführungsform der Erfindung; und

Fig. 9 und 10

Falzapparatanordnungen des Stands der Technik in zwei möglichen Anordnungsweisen.

Show it:

Fig. 1

a schematic representation of an embodiment of a newspaper printing machine according to the invention;

Fig. 2

a more detailed schematic representation of the folder assembly according to the present invention with two each three formers formers, guide rollers and a movable folder;

Fig. 3

a schematic representation of the folding apparatus shown in Figure 2 in a first arrangement way.

Fig. 4

the folder apparatus shown in Figure 2 in a second arrangement manner.

Fig. 5

the folder assembly shown in Figure 2 in a third arrangement way.

Fig. 6

the former arrangement shown in Figure 2 in a fourth arrangement way.

Fig. 7

the former arrangement shown in Figure 2 in a fifth arrangement way.

Fig. 8

the former shown in Figure 2 in a sixth arrangement way according to the preferred embodiment of the invention. and

FIGS. 9 and 10

Folding apparatus arrangements of the prior art in two possible arrangements.

The newspaper printing machine 1 shown in Fig. 1, z. B. a web-fed rotary offset printing press, includes a plurality of printing units 2 for printing a Variety of pulleys 6 supplied tracks 4 with a single or multi-colored Image. The roller stands 6 are preferably arranged in the basement of a printing company. To the printing process in the printing units 2, the webs 4 of the invention Forming hopper assembly 8a fed, preferably in the middle of Newspaper printing machine 1 is arranged, but also on one side of the printing press or can be arranged at one end of the printing machine.

As shown in more detail in Fig. 2, the former assembly 8a according to the invention comprises a first row 10a with three formers 12, 14, 16 and a second row 10b with three other formers 18, 20 and 22.

After printing in the printing units 2 and before entering the Forming hopper assembly 8a, the webs 4 are preferably in individual strands or half 24 webs cut, which then by means of the respective former 12, 14, 16, 18, 20, 22 arranged rollers 26 (guide or guide rollers) the formers 12, 14, 16 and 18, 20, 22 of the first and second former rows 10a, 10b are fed.

A plurality of web strands 24 are according to the invention arranged one above the other before they are fed to the formers 12 to 22, four web strands or half webs 24 typically comprise a section of a newspaper form. The superimposing or superimposing the web strands 24 may For example, by means of the conventional collection or shown in Fig. 1 Picking rollers 28 take place, which are often referred to as gathering rollers.

After passing through the former 12 to 22, the superimposed Web strands 24 fed to a press or Zugwalzenpaar 30, whereby the one above the other laid web strands 24 are folded longitudinally. After passing the draw rollers 30 be the longitudinally folded, superimposed web strands 24 over a variety of Guide rollers 32 fed to a folder 34. As indicated by arrow 36 in FIG. 2 is indicated, the folder 34 with respect to the former 12 to 22 is preferably movably arranged. The folder 34 may be, for example, a conventional one Folder be formed, the incoming, superimposed web strands 24th in a variety of newspapers 38 cuts, which are then folded horizontally and by means of a known paddle wheel assembly 42 are stored on a conveyor belt 40 can. The conveyor belt 40 transports the newspapers 38 preferably in one Shingled flow to a (not shown) further processing station, for. B. one Mailroom.

As described in more detail below, in Fig. 3 to 8 different possibilities shown how the web strands 24 can be guided over the formers 12 to 22.

3 to 5 show a first, second and third arrangement, in each of which 16 pages, d. H. four superimposed, each printed on both sides web strands 24 on the Forming rollers 12 to 22 of the first and second former rows 10a, 10b are guided. In Depending on the position of the folder 34 became one for each arrangement Score determined, which represents the probability, with which it Formation of wrinkles and other damage occurs. In the in Figs. 3 and 4 shown Arrangements, this probability index is 30. As it turns out, On the other hand, the probability index with the arrangement shown in FIG Be reduced 26.5, which is based on the inventive arrangement of Guide rollers, the subsequent, successively superimposing the single, from only one side incoming web strands 24 and the straight feeding the Web strands 24 to the folding unit 34 is due.

In the arrangements shown in Figs. 6, 7 and 8, the folder 34 is the respective same total number of web cords 24 supplied. Due to another pagination the newspaper are fed via the former 14 and 16 of the first former row 10a however eight pages and over the former 22 of the second former row 10b 32th Pages, d. H. eight layers, led. The probability index was 26.5 in of the arrangement shown in Fig. 6 to 25.5 for the arrangement shown in Fig. 7 and even be lowered to 23.0 for the arrangement shown in Fig. 8. As mentioned earlier, the sinking probability index may be due to the different ones Positions of the folding apparatus 34 from a leftmost position in Fig. 6 to a position on the far right in FIG. 8 as well as successively taking place successively shown in FIG Superimposing the incoming of only one (in the example shown on the left) page folded web strands 24 below the former.

The reduction of the probability index in the arrangement shown in FIG However, it can also have other causes, for example, the straight supply of heaviest newspaper section (32 pages), which is fed directly to the folder 34.

In the folding apparatus of the prior art shown in FIGS. 9 and 10 with a stationary folder 134, the probability index in FIG. 9 is 35, and in FIG. 10 at 35.5, although the total number of web cords fed to the folder 134 the same is as in the invention shown in Fig. 3 to 8 Falzapparatanordnungen.

Furthermore, sliding folders allow easier replacement of a Folding apparatus in the event of a defect or a long press with more than a folding section the installation of an additional folder on the if necessary can be used. The folders are preferably on rails displaceable. To move the folders can, for example, hydraulic Adjusting elements or motor-adjusting elements may be provided. To improve the Web strand handling is preferably the folders during the printing operation displaceable.

As shown, the probability index of the various shown in Figs. 3-8 Folding apparatus assemblies 8 according to the invention always lower than that Likelihood Index of the folder assemblies shown in Figs. 9 and 10 of the State of the art.

The present invention is not as described herein particularly in Figs Restricted arrangements. It is Z. B. an offset arrangement of the former 12, 14, 16 the first former row 10a with respect to the second former row 10b or a staggered arrangement of two juxtaposed formers 12 to 22 in one Row 10a, 10b conceivable, which may still the probability index can be further reduced. Also, the number of fed through the formers 12 to 22 Web cords 24 may be altered in any manner to the desired one To achieve pagination and classification of the newspaper.

According to another embodiment of the invention, two may be stacked arranged former hopper rows each with three formers with two preferably slidable folders with separately driven funnel rollers and / or Draw rollers are combined in the way that the different of the formers incoming web strands are fed to any of the two folders. In In this embodiment, two print jobs can be executed independently For example, the printing machine for printing jobs with railways start and stop different length, which is characterized in particular as advantageous proves that several tracks short length to an existing Configuration for a running print job can be added.

List of reference numbers

1

Newspaper printing press

2

printing units

4

traces

6

roll stand

8th

Falzapparatanordnung

8a

former arrangement

10a

first row of formers

10b

second row of formers

12

formers

14

formers

16

formers

18

formers

20

formers

22

formers

24

web strands

26

roll

28

Collection or acceptance rollers

30

drawing rollers

32

guide rollers

34

folding

36

movement direction

38

newspapers

40

conveyor belt

42

fan assembly

134

fixed folder

Claims (19)

1. Method for folding webs of paper in a rotary newspaper printing press, wherein the webs (24) are folded by means of a first, second and third folding cylinder (12, 14, 16) of a first folding cylinder row (10a) and a first, second and third folding cylinder (18, 20, 22) of a second folding cylinder row (10b) arranged below the first folding cylinder row (10a), and before running into a folding machine (34) arranged below the second folding cylinder row (10b), are arranged to lie one on top of the other by means of a plurality of guide rollers (32), characterised in that the folding machine (34) is moved horizontally into a position below any one folding cylinder (18, 20, 22) of the second folding cylinder row (10b).
2. Method according to Claim 1, characterised in that a plurality of webs (24) lying on top of one another are respectively fed to the folding cylinders (12, 14, 16, 18, 20, 22) of the first and second folding cylinder rows (10a, 10b).
3. Method according to Claim 2, characterised in that the total number of webs (24) lying one on top of the other guided over the folding cylinders (18, 20, 22) of the second folding cylinder row (10b) is greater than the total number of webs (24) guided over the folding cylinders (12, 14, 16) of the first folding cylinder row (10a).
4. Method according to Claim 2 or 3, characterised in that a different number of webs (24) lying one on top of the other is guided over at least two of the folding cylinders (12, 14, 16) of the first folding cylinder row (10a).
5. Method according to Claims 2, 3 or 4, characterised in that two webs (24) lying one on top of the other are guided over two of the folding cylinders (12, 14, 16) of the first folding cylinder row (10a) and four webs (24) lying one on top of the other are guided over one of the folding cylinders (12, 14, 18) of the first folding cylinder row (10a).
6. Method according to Claim 5, characterised in that the two webs (24) lying one on top of the other are folded by adjacent folding cylinders (12, 14, 16).
7. Method according to one of the preceding claims, characterised in that a different number of webs (24) lying one on top of the other is guided over at least two of the folding cylinders (18, 20, 22) of the second folding cylinder row (10b).
8. Method according to one of the preceding claims, characterised in that four webs (24) lying one on top of the other are guided over two of the folding cylinders (18, 20, 22) of the second folding cylinder row (10b) and eight webs (24) lying one on top of the other are guided over one of the folding cylinders (18, 20, 22) of the second folding cylinder row (10b).
9. Method according to Claim 8, characterised in that the four webs (24) lying one on top of the other are folded by adjacent folding cylinders (18, 20, 22).
10. Apparatus for folding webs of paper in a rotary newspaper printing press with a first folding cylinder row (10a) and a second folding cylinder row (10b) arranged below the first folding cylinder row (10a), which respectively comprise a first, second and third folding cylinder (12, 14, 16, 18, 20, 22), and with a plurality of guide rollers (32), which deliver the folded webs (24) from the folding cylinders (12, 14, 16, 20, 22) of the first and second folding cylinder rows (10a, 10b) to a folding machine (34) arranged below the second folding cylinder row (10b), characterised in that the folding machine (34) is arranged to be horizontally movable into a position below any one folding cylinder (18, 20, 22) of the second folding cylinder row (10b).
11. Apparatus according to Claim 10, characterised in that the folding machine (34) is arranged below the folding cylinder (18, 20, 22) of the second folding cylinder row (10b), which folds the largest number of webs (24).
12. Apparatus according to one of claims 10 or 11, characterised in that the folding cylinders (12, 14, 16) of the first folding cylinder row (10a) are arranged in a row in relation to the folding cylinders (18,20,22) of the second folding cylinder row (10b).
13. Apparatus according to one of Claims 10 or 11, characterised in that the folding cylinders (12, 14, 16) of the first folding cylinder row (10a) are staggered in relation to the folding cylinders (18, 20, 22) of the second folding cylinder row (10b).
14. Apparatus according to one of Claims 10 to 13, characterised in that a further movable folding machine is provided.
15. Apparatus according to Claim 14, characterised in that associated with each of the folding cylinders (12, 14, 16, 18, 20, 22) are folding rollers and draw rollers (30), which can be driven separately from one another, so that webs (24) can be delivered to any one of the two folding machines (34) from any one folding cylinder (12, 14, 16, 18,20,22).
16. Apparatus according to one of Claims 14 or 15, characterised in that the folding machines (34) are movable by displacement on rails.
17. Apparatus according to one of Claims 14 to 16, characterised in that the folding machines (34) are movable during operation of the printing press (1).
18. Apparatus according to one of Claims 14 to 17, characterised in that a section length of the webs (24) is automatically adjustable upon a displacement of the folding machines (34).
19. Apparatus according to one of Claims 14 to 18, characterised in that an adjusting clement is provided for movement of the folding machines (34).

Images