EP0827931A2 - Device and method for the dynamic guidance of flat articles - Google Patents

Abstract

Each cutting cylinder (6) of the at least one pair of cutting cylinders has at least one cutter-blade (12) and cutter-bar (13). The conveyor plane (15) extends vertically during operation. The interacting cutter cylinders (6) are integrated into the track of the separate conveyor elements (18,19) on the tracks of the first (17) and second (16) conveyor so as to grip the web of material (1) before the cutting operation performed by the cutting cylinders.

Description

The present invention relates to an apparatus and a method for dynamic Leading flat products such as flat products by cross cutting of be cut off from a continuous web of material.

Publication US 5,029,842 discloses a signature handling device that a first conveyor belt, the signatures successively to a removal station promoted. At the removal station, the signatures are turned on one by one Hand over the receiving conveyor. About the speed with which the signatures can move between the first conveyor belt and the receiving conveyor belt increase, the signatures have a wave formation consisting of stiffening one or more waves. Accordingly, the stiffening Signatures arranged at the removal station a wave forming device, the Signatures waves between the front and the extends the rear signature area. Although the wave formation of a signature is only temporary is, the wave forming device is so close to the receiving conveyor that a wave formation in the signature is retained during the front signature area moves towards the receiving conveyor. This means that the distance between the Wave forming device and the receiving conveyor belt is smaller than the distance between the front and back signature area.

The publication US 5,107,733 discloses a device for cutting and Transporting a paper web in a folder of a printing press. The The device comprises a pair of cutting cylinders to cut the web into web sections cut, and a transport device to the web sections from the Schrieid cylinder to be transported away. The first cutting cylinder has at least one cutting rail, and the second cutting cylinder is provided with at least one cutting knife attached to a gap formed between the cutting cylinders strikes the cutting rail, to cut the path passing through the gap. Both on the first and on A large number of strips are supported on the second cutting cylinder. The lasts are positioned on the cutting cylinders so that - when the gap passes - everyone Give the newly formed front web area a temporary stiffening profile. Everyone The front web area is provided with a stiffening profile to the front Supportive area, while this differs from that between the Cutting cylinders formed gap moved to the transport device. In addition to the Last is also on both the first and the second cutting cylinder supported at least one smoothing surface each. The smoothing surfaces are so on positioned the cutting cylinders that the temporary when passing through the gap Remove the stiffening profile from the front web areas.

Despite the presence of the aforementioned signature handlers, there are a technical problem, namely that after separating signatures or Copies of a continuous web during its transport to the conveyor belts there is no longer any reliable management of the signatures. After cutting off the The leading edge of the signature is fed to the inlet gap of the conveyor belts. However, geometric constraints prevent the conveyor belts from signing reliably until this signature has passed the cutting cylinder. A critical one Zone of each signature leading edge extends from an area behind Cutting gap to a point in front of which the conveyor belts reliably guide over reach the leading edge. The leading edge of the signature is not on this route tensioned so that they are on their way to the conveyor belts from a desired straight line can deviate. The signatures give way, especially in the case of pointless folders or specimens often along curved paths instead of a given straight one Follow the path from the cutting cylinders to the conveyor belts. These deviations can lead to the fact that the distances between the supported signatures or Copies are different, resulting in a pointless folder Difficulties arise in the further processing of the signatures.

Another disadvantage of existing cutting cylinders is related to Belt conveyance the fact that the leading edges of the signatures stick out. This Accidental opening of a leading edge of the signature can lead to processing jams or Damage to the product such as Cause dog ears or the like.

In conjunction with cutting cylinders, additional ones are also available Wave forming devices such as those disclosed in US 5,107,733 used. It is also proposed to use electrostatic staplers that seen upstream of the cutting cylinders to which during the Get control of problems that occur when signing. This However, solutions create new problems and do with a pointless folder the signature transfer area between cutting cylinders and conveyor belts into one very sensitive area.

Based on the state of the art and the related According to problems of a technical nature, it is an object of the present invention to keep signatures separated from a material web while these are between a cutting gap and an inlet gap of the conveyor belts.

Another object of the present invention is to use during transportation the conveyor belts have a relatively constant distance between those of the web of material separate signatures.

Another object of the present invention is to provide the leading edges of the Prevent signatures from opening during transport.

According to the exemplary embodiments of the present invention, a Device for transporting signatures in a folder at least two cooperating cutting cylinders, each cutting cylinder having at least one Cutting knife or is provided with a cutting rail, and a conveying plane, the extends substantially vertically in operation, a first conveyor arrangement and a second conveyor arrangement, the cooperating cutting cylinders in the paths of Conveyor elements of the first conveyor arrangement are integrated and the second Conveyor arrangement one web of material in front of the two interacting Cutting cylinder performed cutting process detected.

Embodiments also refer to a method for transporting Signatures of a folder that gradually passes through a web of material transverse cutting plane by means of at least a first and a second Conveyor arrangement that conveys the material web both in an infeed area and detected in an outlet area of the transverse cutting plane and the detected Material web effectively feeds a finger-shaped guide seen downstream is arranged after the first and the second conveyor arrangement.

Embodiments according to the present invention enable bilateral Guide the web before signatures in the cutting gap from the leading edge of the Material web are separated. Since longitudinally folded signatures are recorded and held together, the opening of signature leading edges is reduced and / or completely switched off. In addition, due to the fact that one of the Cutting gap up to an inlet gap of the conveyor belts through the area Conveying arrangements is bridged, a deviation from signature leading edges prevented and a constant distance between the successive signatures maintain.

According to further details of the present invention, the conveyor elements either in any number in groups (e.g. in groups of two or three Conveyor elements) - each group of conveyor elements from the following Conveyor element group is spaced - and / or on the paths of the conveyor arrangements be arranged individually.

The arrangement of the conveyor elements in groups of at least two or three Conveying elements has advantages in the lower area of the outlet gap Funding level. The second and / or third support elements of each group practice one slip-free drive on the signatures, while this on the lower pair of tapes reach.

The conveyor elements arranged either in groups and / or individually are over Connecting elements, which form a closed circuit for each conveyor arrangement, connected with each other. The conveyor elements can e.g. Crossbars that are over extend the width of the web of material with the crossbars spaced apart Have guide washers. Alternatively, the conveyor elements can e.g. around Act endless belts, in the scope of which cutouts are provided. The Cutting cylinder pair has segments with a reduced radius, which the Conveyor elements allow passage, the cutting cylinder in the paths of the Funding elements are integrated. The segments with reduced radius represent one arcuate recess on the cylinders. Before cross cutting the The material becomes the material web in a cutting plane that runs across the conveyor plane gripped by the conveyor elements on both sides.

In a downstream area of the outlet gap of the conveyor arrangements arranged at least one pair of guide fingers. The leading fingers reach into the empty ones Gaps between the guide discs of the rotating crossbars, creating the Signatures a straight movement (e.g. a straight vertical downward movement) can execute.

In a previously mentioned alternative embodiment, the endless belts instruct cutouts on their circumference, which are an interaction of the two cutting cylinders enable. The endless belts extend essentially across the width of the Material web and thus carry the signatures separated from the material web. The Endless belts are without phase shift in relation to the rotation of the Cutting cylinder pair driven and also at the speed at which the material web is transported.

Fig.1

ist eine schematische Ansicht zweier Förderanordnungen, die einer sich im wesentlichen senkrecht erstreckenden Förderebene zugeordnet sind;

Fig. 2

ist eine vergrößerte Ansicht des Schneidzylinderabschnitts;

Fig. 3

ist eine vergrößerte Ansicht des Auslaufspaltbereichs der Förderanordnungen;

Fig. 4

zeigt fingerförmige Führungen, die in die Lücken zwischen den Führungsscheiben greifen, die auf den als Querstangen ausgebildeten Förderelementen angebracht sind;

Fig. 5

zeigt ein alternatives Ausführungsbeispiel der Förderanordnungen in Form von Endlosbändern, in denen Ausschnitte vorgesehen sind; und

Fig. 6

zeigt die Endlosbänder, die die Materialbahn und von der Materialbahn abgetrennte Signaturen führen.

The aforementioned and other objects of the present invention are explained in more detail in the following detailed description of the preferred exemplary embodiments with the aid of corresponding drawings.

Fig. 1

is a schematic view of two conveyor assemblies associated with a substantially perpendicular conveyor plane;

Fig. 2

Fig. 3 is an enlarged view of the cutting cylinder section;

Fig. 3

is an enlarged view of the discharge gap area of the conveyor assemblies;

Fig. 4

shows finger-shaped guides which engage in the gaps between the guide disks, which are mounted on the conveyor elements designed as cross bars;

Fig. 5

shows an alternative embodiment of the conveyor arrangements in the form of endless belts, in which cutouts are provided; and

Fig. 6

shows the endless belts that guide the material web and signatures separated from the material web.

In Fig. 1 a material spell 1, e.g. a strand, by means of press rolls 3 over a Funnel 2 pulled in the longitudinal direction. The longitudinally folded material web 1 then passes one first pair of pull rollers 4 and a second pair of pull rollers 5. After passing through the second The pair of pull rollers 5 passes through the material web 1 through a pair of cutting cylinders 6 and one Knife cylinder 10 and a counter cylinder 11 (e.g. made of rubber), the Knife cylinder at least one cutting knife 12 and the counter cylinder at least one Have cutting rail 13. In a gap 7 formed by the cutting cylinders the signatures are separated from the material web 1 by the cutting cylinders, wherein the cutting cylinder in a cutting plane that is transverse to a conveying plane runs, perform a transverse cutting process.

Before the transverse cutting process, the material web 1 is on both sides of Conveying elements 18, 19 of a first (e.g. arranged on the left) conveyor arrangement 17 and a second conveyor arrangement 16 (e.g. located on the right). In the in Fig. 1st shown embodiment are the conveyor elements 18,19 in groups with a first, a second and a third conveyor element arranged. As shown in Fig. 2, the Reference numbers 18.1, 18.2 and 18.3 a group of conveyor elements of the left Conveyor arrangement 17, while the corresponding first, second and third conveyor element 19.1, 19.2 and 19.3 belong to the right funding arrangement 16. On the paths of the Conveyor arrangements 16, 17, the conveyor element groups 18, 19 are spaced apart from one another, as indicated by arrow 22 in Fig. 1. The conveyor elements 18, 19 are over Connecting elements 20 connected to each other. In an alternative Embodiment, the conveying elements need not be arranged in groups, they can rather be designed as individual funding elements; it is also conceivable to combine individual conveyor elements with groups of conveyor elements.

The material web 1 is from the conveyor element groups 18, 19 above the Cutting cylinder pair 6 detected. To capture the web of material 1 while it is along the conveying paths of the two conveying arrangements 16, 17 in the conveying plane 15 moves, which is substantially perpendicular to the operation of the device in Fig. 1 extends, the conveyor element groups 18, 19 pass between the knife cylinder 10 and the counter cylinder 11 by immersing them in segments of these cylinders, which in have a reduced radius with respect to other cylinder segments. The arcuate first and second recesses 8, 9 in each of the two Cylinders 6 are provided, allow the conveying elements 18, 19 to grip the Material web 1 in the input area arranged in front of the gap 7 and a separate one Signature 25 in an output area downstream of the gap 7 after the signature has been separated from the material web 1. Thus, a reliable management of the separated signatures 25 still guaranteed.

In one of the left and right conveyor arrangements 16, 17 are subordinate areas Finger-shaped guides 23, 24 attached to a correct signature entry on the left and ensure the right conveyor belt 26, 27.

FIG. 2 is an enlarged view of the cutting cylinders, with the cutting cylinder pair 6 is integrated into the path of the conveyor element groups 18 and 19. The Conveyor element groups 18, 19 capture the material web 1 in front of the pair of cutting cylinders 6. Dive to stay in close contact with the web of material 1 being conveyed the conveyor element groups 18, 19 and / or the individual conveyor elements 18, 19 in the first and second arcuate recess 8, 9 on each cylinder of the Cutting cylinder pair 6 is provided, after interacting knife 12 and Cutting rails 13 have a signature separated from the material web 1. In Seen circumferential direction of the knife cylinder 10 and the counter cylinder 11, the Arc length of the first and the second recess 8, 9 in Fig. 2 by the Reference numeral 21 indicated. The recesses 8, 9 (i.e. the segments with reduced Radius) extend from one knife 12 to the next knife 12 on the Knife cylinder 10 and from one cutting rail 13 to the next cutting rail 13 the counter cylinder 11.

Thus, the material web 1 before the transverse cutting process Conveyor element groups 18, 19 out. It also prevents the separated Signature fanned out at its front edge and from the substantially vertical running funding level 15 deviates. Hence the distance between consecutive signatures separated from the material web 1 constant, and Deviations from the desired funding path are reduced or entirely switched off.

As previously mentioned, a lower portion of the conveyor assembly 16, 17 (e.g., the Outlet gap) two finger-shaped guides or guide elements 23, 24. The Conveyor element groups 18, 19 in which the elements 18.1, 18.2 and 18.3 or 19.1, 19.2 and 19.3 are summarized, funding paths follow in the lower area of the Conveyor arrangement 16, 17, the respective paths of the conveyor elements the leading edge of each signature to the vertical gap that is between the Forming guide elements 23, 24.

In a stage of an embodiment shown in Fig. 2, the leading edge each signature of the second and third conveyor elements 18.2, 18.3 and 19.2, 19.3 guided, while the rear edge of individually arranged conveyor elements 18, 19 - as shown in Fig. 2 - is performed. The material web 1 above the Cutting cylinder pair 6 is detected by conveyor element groups 18, 19, some of which in the first recess 8, which is the knife cylinder 10 and the counter cylinder 11 is assigned.

3 is an enlarged view of the discharge gap area of the conveyor assemblies. Each Signature 25, which is conveyed in the conveyor plane 15, is at its front edge by the Conveyor element groups 18.1, 18.2, 18.3 and 19.1, 19.2, 19.3 are recorded. The Conveyor element groups 18, 19 lead the signature leading edge in the between the finger-shaped guide element pair 23, 24 formed a gap. According to the picture the previous signature 25 is guided by the left or right conveyor belt. If the conveyor elements 18.1, 18.2, 18.3 and 19.1, 19.2, 19.3 are moved further, the tendency is each of the first conveyor elements 18.1 and 19.1 to the respective path of the Conveyor arrangement 16, 17 to follow. The second and third conveyor elements 18.2, 18.3 and 19.2, 19.3 exert a slip-free drive on a signature 25 in order to insert it into the to direct gap formed between the finger-shaped elements 23, 24. Because the distance between the clamping point of the third conveyor elements 18.3 and 19.3 and the slip-free drive of the lower belts 26, 27 is smaller than the signature 25 long a slip-free drive of the separated signature 25 in the transfer area maintain.

The signatures 25 are transported to further processing stations by the turn lower belts 26, 27 about rollers 28. In an area at the top of the Finger-shaped elements 23, 24, in which the conveying elements 18, 19 come closer, are sufficient the tips of the finger-shaped elements 23, 24 in the between the guide discs of the Conveying elements 18, 19 formed spaces, as in Fig. 4 in more detail is illustrated.

Fig. 4 shows conveying elements 18, 19 which are attached as cross bars 31 and spaced apart guide discs 30 are formed. The finger-shaped Guides extend into the between the guide washers and the crossbar-like Gaps formed into elements. Enough in this perspective view the tips of the finger-shaped guide elements 23, 24 in between the Guide disks 30 formed spaces 30.1. The guide discs 30 are arranged so that they are spaced from each other and inserting the tips of the Guide elements 23, 24 between the elements of the conveyor element groups 18, 19 enable. After inserting a signature leading edge in the between the finger-shaped guide elements 23, 24 formed gap, direct the second and third Conveying elements 18.2, 18.3 and 19.2, 19.3 the signature 25 by making them reliable lead, completely in the gap formed between the finger-shaped elements 23, 24. Consequently the finger-shaped guide elements 23, 24 already take over the management of the signature, before the conveyor elements 18.3, 19.3 release the signature 25.

The guide disks 30 can e.g. made of rubber or a synthetic material exist, which creates a frictional force, which is also on the front edge of one on both sides recorded signature is transmitted. Of course, any material can be used that provides the desired frictional contact.

5 and 6 show an alternative embodiment of the conveying element, the Conveying elements are designed as endless belts, the width of which is in one Embodiment extends across the width of the material web 1. How the professional too worthy of white, ribbons of any width can be used in alternative designs will. The cutting cylinders - i.e. a knife cylinder 10 and a counter cylinder 11 - are each surrounded by one of the endless belts 34, 35. The rollers around which the endless belts 34, 35 run, are not shown in the drawings for the sake of clarity. Of the Knife cylinder 10 and the counter cylinder 11 are of the first and second type Recesses 8, 9 provide that the endless belts 34, 35 during the separation of the Signatures 25, 38 ensure reliable management of the signatures. The Endless belts 34, 35 which, in relation to the knife cylinder 10 and the counter cylinder 11 revolve without phase shift, have rectangular cutouts 36, 37 which the Cylinders 10, 11 allow cross cutting.

The endless belts 34, 35 run in the direction of the arrow 39, 40. The leadership roles of Endoscopes (not shown) are in the curvature areas 33 of each Endless belt 34, 35 arranged in a manner that any specialist immediately illuminates. The endless belts 34, 35 run at the speed of the material web 1 order and ensure reliable guidance of those separated from the material web 1 Signatures 25, 38. Since the circulating endless belts 34, 35 have a material web 1 in front of the Detect cross cuts and the signatures 25, 38 during the cutting process and then detect deviations in the signatures 25, 28 are avoided. Furthermore, the predetermined distance between the separated signatures 25, 38 are maintained.

LIST OF REFERENCES

1

Material web

2nd

funnel

3rd

Press rolls

4th

first pair of pull rollers

5

second pair of pull rollers

6

Pair of cutting cylinders

7

Gap between cutting cylinders

8th

first recess of the cylinder 6

9

second recess of the cylinder 6

10th

Knife cylinder

11

Counter cylinder

12th

Cutting knife

13

Cutting rail

15

Funding level

16

second conveyor arrangement

17th

first conveyor arrangement

18th

Conveyor element

18.1

Conveying element of the conveyor arrangement 17

18.2

Conveying element of the conveyor arrangement 17

18.3

Conveying element of the conveyor arrangement 17

19th

Conveyor element

19.1

Conveyor element of the conveyor arrangement 16

19.2

Conveyor element of the conveyor arrangement 16

19.3

Conveyor element of the conveyor arrangement 16

20th

Fasteners

21

Arc length

23

finger-shaped guide elements

24th

finger-shaped guide elements

25th

signature

26

left conveyor belt

27

right conveyor belt

28

roll

30th

Guide washers

30.1

Gaps

31

Crossbars

33

Area of curvature

34

Endless belt

35

Endless belt

36

Neckline

37

Neckline

38

signature

39

Arrow direction

40

Arrow direction

Claims (19)

Device for transporting copies in a folder, with at least one pair of interacting cutting cylinders (6), each cutting cylinder (6) having at least one cutting knife (12) and a cutting rail (13) and a conveying plane (15) essentially during operation extends vertically,
marked by a first conveyor arrangement (17) and a second conveyor arrangement (16), the interacting cutting cylinders (6) being integrated in the path of the conveyor elements (18, 19) of the first and the second conveyor arrangement (17, 16) to form a material web (1 ) before a cutting process performed by the interacting cutting cylinders (6). Device according to claim 1,
characterized, that the respective conveyor elements (18, 19) are arranged in groups, each group having at least a first conveyor element (18.1, 19.1), a second conveyor element (18.2, 19.2) and a third conveyor element (18.3, 19.3) and the first, second and third conveyor elements of each group are located on the paths of one of the conveyor arrangements (17, 16) Device according to claim 1,
characterized, that the conveyor elements are arranged as individual conveyor elements (18, 19) on the paths of the first and the second conveyor arrangement (17, 16). Device according to claim 1,
characterized, that the conveyor elements (18.1, 18.2, 18.3) of the first conveyor arrangement (17) are spaced apart from one another along the path of the first conveyor arrangement (17), and that the conveyor elements (19.1, 19.2, 19.3) of the second conveyor arrangement (16) are spaced apart from one another along the path of the second conveyor arrangement (16). Device according to claim 1,
characterized, that the first and the second conveyor arrangement (17, 16) are assigned to the substantially vertically extending conveyor plane (15). Device according to claim 1,
characterized, that the conveyor elements (18.1, 18.2, 18.3; 19.1, 19.2, 19.3) within the respective first and second conveyor arrangement (17, 16) by connecting elements (20), each in the respective first and second conveyor arrangement (17, 16) a closed Form a loop, are connected to each other. Device according to claim 1,
characterized, that the conveyor elements (18.1, 18.2, 18.3; 19.1, 19.2, 19.3) are transverse cross bars with guide disks (30) mounted thereon. Device according to claim 1,
characterized, that each of the cutting cylinders (6) has segments which have a reduced radius with respect to other cutting cylinder segments, and that the conveying elements (18, 19) move through these segments in the area between the interacting cutting cylinders (6). Device according to claim 8,
characterized, that the segments with a reduced radius, which are located on each of the interacting cutting cylinders (6), have an arcuate first and second recess. Device according to claim 1,
characterized, that the conveyor elements (18.1, 18.2, 18.3; 19.1, 19.2, 19.3) of the first and the second conveyor arrangement (17, 16) are operationally designed such that they rotate at the speed at which the material web is transported and that they grasp the material web on both sides. Device according to claim 7,
characterized, that the conveying elements (18, 19) have spaces (30.1) between the guide disks (30). Device according to claim 1,
characterized, that a discharge gap of the first and the second conveyor arrangement (17, 16) is assigned a first and a second finger-shaped guide element (23, 24). Device according to claim 2,
characterized, that the second and third conveyor elements (18.2, 18.3; 19.2, 19.3) of each conveyor element group (18.1, 18.2, 18.3; 19.1, 19.2, 19.3) move a signature (25) cut off from the material web (1) into lower conveyor belts. Device according to claim 1,
characterized, that the first and the second conveyor arrangement are endless belts (34, 35) which are assigned to the substantially vertical conveyor plane (15). Device according to claim 14,
characterized, that each of the endless belts (34, 35) has a respective cutout (36, 37), so that the signatures or copies (25) can be cut off from the material web (1) by the interacting cutting cylinders (6). Device according to claim 14,
characterized, that each of the endless belts (34, 35) has a width which extends over the width of the material web (1). Device according to claim 14,
characterized, that the endless belts (34, 35) are driven without phase shift, that is and in synchronism with the pair of interacting cutting cylinders (6), and at a speed at which the material web (1) is transported. Device for transporting the leading edge of a material web, comprising the following features: a conveying plane (15) on which a material web (1) is transported; at least one pair of interacting cutting cylinders (6), each cutting cylinder having at least one cutting knife (12) and a cutting rail (13) and the cutting cylinders (6) producing a cutting plane transverse to the conveying plane (15); and a first and a second conveyor arrangement (17, 16), the interacting cutting cylinders (6) being integrated in the paths of the conveyor elements (18, 19) of the first and the second conveyor arrangement (17, 16) in order to close the material web (1) grasp before a cutting process is carried out by the cutting cylinder (6). Method for transporting signatures in a folder, comprising the following steps: transporting the material web through a transverse cutting plane by means of at least a first and a second conveyor arrangement, which grip the material web in an inlet area and an outlet area of the transverse cutting plane; and moving the gripped material web into a finger-shaped guide (23, 24), which is located downstream of the first and the second conveyor arrangement (17, 16).

Images