EP1097892B1 - Device for and method of cutting and deviating signatures - Google Patents

Abstract

The method for cutting a strip (5) of paper and turning the signatures produced around comprises perforating the strip to form partially separated signatures. The sections are then fed through a cutter (14) to separate them completely. A first belt (30) is fed between the cutters and the signatures are supported between it and a second belt (40). They are then alternately fed straight on, on the first belt, or turned through 180 degrees on the second belt. An Independent claim is included for a device for use in the above process.

Description

The present invention relates to an apparatus and a method for cutting one path and to redirect the resulting signatures into two Transport paths of a web-fed rotary printing press.

In web-fed rotary printing machines, a material web, e.g. B. printed on a paper web and then cut into signatures in a cutting unit, which are then in folded in a folder or processed in any other way. To the signatures To arrange or fold in the desired way, the signatures are often in for example, two streams of signatures directed and braked.

In US 5,607,146 is a device for deflecting products in one Folders described. The web is signed by a pair of cutting cylinders cut, which are then picked up by a pair of conveyor belts. each The conveyor belts include a raised surface that is level with the other Band interacts. The signatures are due to the raised areas of the tapes alternately offset with respect to a center line so that a signature is slightly to the left and the subsequent signature is shifted slightly to the right. After that the Signatures past a guide element depending on whether it is left or have been moved to the right, on the pockets from side by side Paddle wheels pass that the right paddle wheel has a signature offset to the right and the left paddle wheel picks up the subsequent signature shifted to the left. The Terms "left" and "right" are used here only for descriptive purposes. The signatures are accordingly divided into two by the pockets of the paddle wheels different signature streams split.

In US 5,615,878 a cutting device is described which completely in a web Cuts signatures, which are then taken from two conveyor belts interlocking raised sections are included. The raised areas the bands cause the signatures to be alternately offset with respect to a center line so that a signature is slightly offset in one direction and to a first Paddle wheel is passed and the subsequent signature slightly in the other direction transferred and transferred to a second paddle wheel. The paddle wheels are included arranged side by side and their shovels overlap.

In US 5,702,100 a cutting device is also described that a web in Cuts signatures, which are then picked up by conveyor belts. Two Deflection elements direct each of the signatures into one of two arranged side by side Paddle wheels.

However, the devices described in the cited documents have the disadvantage on that the signatures completely at a relatively large distance from the tapes be severed, what the transfer of signatures from the cutting device to the Eischwert bands. In addition, the top ends of the signatures are poor be supported. These disadvantages can result in damage or failure Redirect the signatures. In addition, the signatures are juxtaposed Arranged devices redirected, which often takes up much space takes.

WO 97/24284 A discloses a method and a deflection device according to the preamble of claims 1 and 8.

The object of the present invention is to provide a reliable device and a to create a reliable method for redirecting signatures. Another job the invention consists in the space required for a deflection device to reduce.

This object is solved by the features of claims 1 and 8.

The inventive method for cutting a web and redirecting the The resulting signatures include the following steps: First, the Partially cut web so that partially cut web sections result. The partially cut web sections are cut in by means of a cutting device Cut signatures. A first volume is covered by at least part of the Cutting device guided. The signatures are between the first volume and one second volume recorded in such a way that the signatures are alternately offset, so that a first and a second signature stream arise.

The method according to the invention advantageously makes it possible by means of the two Steps performed that the signatures closer to the last one Cutting device can be detected so that the web during the cutting process can be held securely in position by the pair of bands. The tension and the exact positioning of the web is maintained during the entire cutting process. In this way, the signatures are also reliably deflected.

According to the method according to the invention, it is also preferably provided that the Signatures are positioned on the cutter so that its leading edge is on a rear edge of an elevated portion of one of the tapes. That way positioning the tapes in close proximity to the cutting process enables what at the cutting devices of the prior art, which only one cutting process provide is difficult or impossible to reach.

After the signatures form a first and a second signature stream were arranged offset, the first and second signature stream are preferably on a first or a second boom, for example, as Braking devices can be formed.

According to a further embodiment of the invention, the boom can for reasons the space saving can be arranged one above the other. In this case, the first Signature stream offset in a first direction, captured by the first boom, by the second, released tape released and supported by a first signature support surface. The second signature stream is preferably shifted in the opposite direction, so that it is led past the first signature support surface. The first volume and the The back of the first signature support surface can then be used to support the second Signature stream are used. The second signature stream is then preferably held by a third band and the first band and to the second Boom transported.

The deflection device according to the invention comprises a first cutting device for partial cutting of the web, a second downstream of the first cutting device Cutting device to completely cut the web, so that a variety of Signatures, and at least a first volume and at least a second volume, which hold the signatures, the first band increasing at least a first one outer section and by at least part of the second Cutting device runs and the second band at least a second raised outer portion, and wherein the first raised outer portion and the second raised outer section cooperate to take the signatures alternately in to put different directions so that a first and a second Signature stream are formed.

An advantage of the device according to the invention is that the voltage and the correct positioning of the web is maintained during the cutting process since two Cutting devices are provided since the first band passes through at least part of the second cutter runs and since the resulting staggered arrangement enables effective redirection of the signatures. In particular, it is advantageous if both the first and the second belt all through the second cutter run to the guidance of the signatures immediately after the cutting process support.

Preferably there are more bands than just the first band and the second band provided, and the tapes preferably form a plurality of in pairs interacting, spaced-apart bands. The second Cutting device preferably comprises a plurality of spaced apart arranged cutting discs, between which non-cutting spaces are formed. The pairs of bands preferably run through the non-cutting ones Gaps in the second cutter.

The first signature stream is preferably fed to a first boom, and the second signature stream is preferably fed to a second boom.

The first boom preferably comprises a first signature support surface for supporting the Signatures after their release by the first and second volume. The first Signature support surface preferably comprises a supporting side with a curved side Section and a straight back through which the signatures of the second Signature stream can be supported in an advantageous manner before the signatures between the first volume and a third volume or directly to the second boom are handed over. The third volume can be, for example, from Extend recesses on the back of the signature support surface of the first boom.

The first boom and the second boom are preferably gripper braking devices trained which the speed of the signatures can reduce.

The present invention is particularly for high speed web-fed rotary printing presses suitable, the z. B. at a speed of over 36.576 km / h (2000 feet per minute) run as the signatures last for the entire period be kept safe.

A further embodiment of a space-saving deflection device comprises preferably a cutting unit for cutting a web into a plurality of Signatures, a first band and a second band with raised outer sections that interact to offset the signatures alternately so that a first and a second signature stream are formed, a first boom for receiving the first Signature stream and a second boom arranged below the first boom to receive the second signature stream.

Further advantages and advantageous embodiments of the present invention are Subject of the figures shown below and their descriptions.

Fig. 1

eine Seitenansicht einer ersten Ausführungsform einer erfindungsgemäßen Schneide- und Umlenkvorrichtung einer Rollenrotations-Offsetdruckmaschine;

Fig. 2

eine perspektivische Vorderansicht der in Fig. 1 gezeigten Vorrichtung;

Fig. 3

eine Seitenansicht der zweiten Schneidevorrichtung der in Fig. 1 gezeigten Vorrichtung;

Fig.4

eine Seitenansicht des Abschnitts, in dem die Signaturen entweder in die erste Auslegevorrichtung oder an dieser vorbei in die zweite Auslegevorrichtung geführt werden; und

Fig. 5

eine alternative Ausführungsform einer erfindungsgemäßen Schneide- und Umlenkvorrichtung.

They show in detail:

Fig. 1

a side view of a first embodiment of a cutting and deflecting device according to the invention of a web-fed offset printing press;

Fig. 2

a perspective front view of the device shown in Fig. 1;

Fig. 3

a side view of the second cutting device of the device shown in Fig. 1;

Figure 4

a side view of the portion in which the signatures either in the first delivery device or past this in the second delivery device; and

Fig. 5

an alternative embodiment of a cutting and deflecting device according to the invention.

1 is a side view of a first embodiment of the present invention shown. The schematically illustrated deflection device 1 comprises a cutting unit 10, which is shown in FIG. 2 in a perspective front view.

As shown in Figs. 1 and 2, a web 5, e.g. B. a printed paper web, in a first cutting device 12 of the cutting unit 10. The first cutter 12 generated preferably by means of a plurality of interacting with an auxiliary surface Cutting knives in the web 5 perforations 6. This way are not completely separated signatures preformed, the edges of which form the perforations. The However, web 5 remains tense since the preformed signatures still have webs 8 are connected between the perforations 6. Then the track becomes a couple rotating disc rollers 20 and 21 are fed, each of a plurality of spaced apart side by side, connected via a rotatable axis 120 or 121 include. The disks 120, 121 form spaced apart from one another arranged gaps, which capture the web 5 such that the webs 8 the gaps run through. The perforations 6 run between the columns.

A first belt arrangement 30 is provided to support the web 5 during the cutting process and a second belt assembly 40 is provided. The first belt arrangement 30 runs in the Gaps between the spaced disks 120 and the second Belt assembly 40 runs in the spaces between the spaced disks 121. The belts 40 run around a guide roller 52 and the axis of the disc roller 21. The belts 30 run around the axis of the disc roller 20. The belts 30 and 40 are therefore arranged in such a way that they contact the perforations 6 of the web 5, since the discs 120, 121 on webs 8.

The bands 30 and 40 have elevations on their outside. On the outside of the Bands 30 are raised portions 31 and flat portions 32 are formed. At the Elevated sections 41 and flat sections 42 are formed on the outside of the belts 40. When the first belt assembly 30 interacts with the second belt assembly 40, the raised portions 31 engage the flat portions 42 and the raised portions Sections 41 into the flat sections 32. The raised sections can for example from a large number of rigid elements or arranged next to one another made of a flexible material such as B. rubber. The tape is preferably out a flexible material, such as rubber.

For improved merging of the first band arrangement 30 with the second Belt arrangement 40, guide rollers 33 and 43 are provided, each preferably have a raised section which is in the flat sections 32 and 42 intervenes. The belts 30 and 40 are further supported by additional guide rollers 34, 35 or 44, 45 out.

The inside of the belts 30, 40, the outside of the guide rollers and the axes of the Disc rollers 20, 21 are preferably toothed so that the belts act as toothed belts function. Due to the interlocking, the temporal Sequence of raised and flat sections on the outside of the belts remain guaranteed. The teeth can for example be made of a polymer material, e.g. B. Rubber or metal.

After passing through the disc rollers 20, 21, the web 5 is replaced by a second Cutting device 14 severed on the webs 8. The second cutting device 14 preferably comprises a plurality of spaced apart Cutting discs. Each of the cutting disks preferably includes a blade that is associated with a support disc cooperates so that the web is neatly cut into signatures becomes. The band 40 preferably runs between the cutting disks, the band 30 preferably runs between the support disks.

As shown in Fig. 3, the signature 7 just cut from the web 5 is removed from the Bands 30 and 31 recorded. The front edge of the signature 7 lies on an edge 129 of an raised section 31. The leading edge of the next signature is accordingly on an edge 139 of a raised portion 41.

As shown in FIG. 1, the belts 30, 40 on the rollers 34, 44 merged. In this way, the signature 7 becomes leftward, as shown in FIG. 3 while the subsequent signature will be shifted to the right.

As shown in Figs. 1 and 3, they are alternately in different directions offset signatures either to a first boom 60 or to a second Boom 70 transported. The first boom 60 includes a plurality of grippers 61 and a signature support surface 65. As shown in FIG. 4, the leading edge becomes that of FIG signatures offset on the right are detected by at least one gripper 61 which is in the Spaces between the belts 40 arranged side by side runs. For every Signature is preferably a plurality of grippers arranged side by side intended. After capturing the leading edge of the signature, it can be, for example, in a rotary movement are braked by the gripper, whereby they are from the Signature support surface 65 is supported, which is preferably spaced apart as a plurality structures arranged side by side is formed. The boom 60 led signature stream can then on processing or stacking devices be handed over.

The signatures that were not shifted to the right by the bands 30, 40, but instead to the left, are led past the first boom 60. As shown in Fig. 4, this second stream of signatures initially from the back of the signature support surface 65 and the first belt assembly 30. Between those in the signature support surface 65 gaps formed can a third belt assembly 80 with raised portions 81 run on the outside, between their raised sections 81 on the Outside and the flat portions 32 of the first band 30, the signatures detected become.

As shown in FIG. 1, this second signature stream may be from second boom 70 recorded and by a second signature support surface 75 similar to the basis of the first boom 60 described are supported.

An alternative embodiment of the present invention is shown in FIG the straps are removable so that they can be replaced more easily. The first Cutting device 12 is fastened in brackets 201 and 202 in a frame 200. A first belt assembly 130 is in an upper portion by a first roller 131 and a second roller 132, which are mounted in the frame 200 overhung can. A second belt assembly 140 is in an upper portion of the rollers 141 and 142 guided, which are preferably also overhung in the frame 200 are. The rollers 131, 132, 141 and 142 can alternatively each have an additional one have lateral holder, which nevertheless axially removes the straps 130, 140 allows. The second cutting device 14 is mounted in holders 203, 204, a gap is formed between them, so that the strips 130, 140 are removed can. Include the cylinders of the second cutter and the rollers preferably a storage device through which the tapes can be removed more easily can be. As an alternative to the cutting device, the cutting device can also be provided that a peripheral portion of the cutting cylinder has a smaller Has diameter than the cutting section. Furthermore, the different Thickness of the raised and flat band sections can be used to decrease the weight To make tapes easier without a storage device.

The cantilevers are preferably gripper braking devices such as those for example in US 5,560,599 and US 5,794,929.

For the purposes of this document, the term "band" denotes any device, the one surface facing the signatures with repetitive repetitions Sections includes. The distinction between "first", "second" and "third" device was only made for reasons of clarity and is interchangeable.

List of reference numbers

1

deflecting

5

train

6

perforation

7

signature

8th

Stege

10

cutting unit

12

first cutting device

14

second cutter

20

disc roller

21

disc roller

30

first band arrangement

31

raised sections

32

flat sections

33

guide roller

34

guide roller

35

guide roller

40

second band arrangement

41

raised sections

42

flat sections

43

guide roller

44

guide roller

45

guide roller

52

guide roller

60

boom

61

grab

65

Signature support surface

70

boom

71

grab

75

Signature support surface

80

third band arrangement

81

raised sections

120

slices

121

slices

130

first band arrangement

129

edge

131

first roller

132

second roller

140

second band arrangement

139

edge

141

roller

142

roller

200

frame

201

bracket

202

bracket

203

bracket

Claims (15)

1. Method of cutting a web and of diverting signatures, wherein the web (5) is cut by a first cutting device (12) to form a plurality of partially cut web sections; wherein
   a first belt (30) is guided at least through part of a second cutting device (14); wherein
   the partially-cut web section is cut by the second cutting device (14) to form signatures (7), and wherein
   the signatures (7) are gripped between the first belt (30) and a second belt (40) in such a way that the signatures (7) are offset into different directions in an alternating way so as to form a first stream of signatures and a second stream of signatures,
   characterized in that the first belt (30) has a first raised outer portion (31) and the second belt (40) has a second raised outer portion (41), with the first raised portion (31) being located opposite a non-raised portion (42) of the second belt (40) and the second raised portion (41 ) being located opposite a non-raised portion (32) of the first belt (30), and with the signature (7) being fed between the first belt (30) and the second belt (40) in such a way that it either rests on the first raised portion (31 ) or on the second raised portion (41 ).
2. Method according to claim 1,
   characterized in that the first belt (30) and the second belt (40) pass through non-cutting spaces in the first cutting device (14).
3. Method according to one of claims 1 or 2,
   characterized in that after the first cutting device (12), the web (5) is fed to a pair of rotating disk rollers (20, 21), each of which comprises a plurality of spaced-apart side-by-side disks (120, 121) connected by the axle of rotation, with the web (5) being gripped by the disks (120,121) in such a way that the non-cut connections (8) pass through the gaps between the disks (120, 121).
4. Method according to claim 3,
   characterized in that the first belt (30) passes through the spaces between the spaced-apart disks (120) and that the second belt (40) passes through the spaces between the spaced-apart disks (121).
5. Method according to one of claims 3 or 4,
   characterized in that the disks (120, 121) act on the connections (8).
6. Method according to one of claims 1 to 5,
   characterized in that guide rollers (33, 43) are provided, each of which has a raised portion, the belts (30, 40) being guided by the guide rollers (33, 43) in such a way that their raised portions engage the flat portions (32, 42) of the belts (30, 40).
7. Method according to one of claims 1 to 6,
   characterized in that the belts (30, 40) act as timing belts on the axles of the disk rollers (20, 21).
8. Diverting device having a first cutting device (12) for partially cutting the web (5), a second cutting device (14) arranged downstream of the first cutting device (12) for completely cutting the web (5) so as to form a plurality of signatures (7), and at least one first belt (10, 130) and at least one second belt (40, 140) for engaging the plurality of signatures (7),
   characterized in that the first belt (30, 130) has at least one first raised outer portion (31) and passes at least through part of the second cutting device (14), and that the second belt (40, 140) comprises at least one second raised portion (41), so that the first and second raised portions (31, 41) interact in such a way that the signatures (7) are offset in an alternating way so as to form a first stream of signatures and a second stream of signatures.
9. Diverting device according to claim 8,
   characterized in that non-cutting spaces are provided in the second cutting device (14).
10. Diverting device according to claim 8 or 9,
    characterized in that a pair of rotating disk rollers (20, 21) is provided downstream of the first cutting device (12), each of the disk rollers (20, 21) comprising a plurality of spaced-apart, side-by-side disks (120, 121) connected by the axle of rotation.
11. Method according to claim 9,
    characterized in that the first belt is arranged in the spaces between the spaced-apart disks (120) and the second belt (40) is arranged in the spaces between the spaced-apart disks (121).
12. Method according to one of claims 9 or 10,
    characterized in that the disks (120, 121) are arranged in such a way that they act on the connections (8) of the belt (5).
13. Diverting device according to one of claims 8 to 13,
    characterized in that guide rollers (33, 43) are provided, each of which has a raised portion.
14. Diverting device according to one of claims 8 to 13,
    characterized in that the inner side of the belts (30, 40), the outer side of the guide rollers, and the axles of the disk rollers (20, 21 ) are toothed.
15. Diverting device according to one of claims 8 to 14,
    characterized in that the belts are removable, with particularly the cylinders of the second cutting device (14) comprising a throw-off device which makes it possible to remove the belts.

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