EP1803673A1 - Folding machine - Google Patents

Folding machine Download PDF

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Publication number
EP1803673A1
EP1803673A1 EP20060291856 EP06291856A EP1803673A1 EP 1803673 A1 EP1803673 A1 EP 1803673A1 EP 20060291856 EP20060291856 EP 20060291856 EP 06291856 A EP06291856 A EP 06291856A EP 1803673 A1 EP1803673 A1 EP 1803673A1
Authority
EP
European Patent Office
Prior art keywords
blade
cylinder
counter
folder according
speed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20060291856
Other languages
German (de)
French (fr)
Other versions
EP1803673B1 (en
Inventor
Jean-Francois Robert
Alain Blanchard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goss International Montataire SA
Original Assignee
Goss International Montataire SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Goss International Montataire SA filed Critical Goss International Montataire SA
Publication of EP1803673A1 publication Critical patent/EP1803673A1/en
Application granted granted Critical
Publication of EP1803673B1 publication Critical patent/EP1803673B1/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/28—Folding in combination with cutting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9309—Anvil
    • Y10T83/9312—Rotatable type

Definitions

  • Document is known EP-A-1 362 819 , a folding machine for a rotary press which comprises a blade or cutting cylinder provided with a blade adapted to cut a strip of material to be printed as well as several counter pressure elements cooperating with the blade and arranged so as to form interstices axial between them.
  • Tape straps extend into the axial interstices that serve to guide the printed web or die cut signature.
  • the timing belts comprise counterpressure elements which are placed in the aforementioned axial interstices.
  • the blade also applies to the counterpressure elements of the belts during cutting.
  • This folder has the disadvantage that the belts are quickly damaged by the blade, and must be regularly changed.
  • the invention aims to overcome this disadvantage and to propose a folder which has longer maintenance intervals.
  • the invention relates to a folder as indicated above, characterized in that the blade extends over the axial gap, and in that the conveying element extends into the axial gap at a distance from the blade when the blade cooperates with the counter-pressure elements.
  • Figure 1 a folder according to the invention, designated by the general reference 2.
  • This folder 2 is adapted to cut and fold a strip of material to be printed, such as a paper strip 4.
  • the paper strip 4 may have one or more layers.
  • the band 4 is driven with a band speed V 1 .
  • the folder 2 is equipped with two pairs of traction rollers 6 and 8 of the strip 4.
  • the folder 2 comprises a blade or fold cylinder 10, a counter-pressure cylinder 12, a transfer cylinder 14 and two cylinders transfer device 16.
  • the folder 2 is adapted to cut the web 4 into signatures 18 or sheets 18 and to transport the signatures / sheets with a signature speed V 2 which is preferably greater than the web speed V 1 .
  • the blade cylinder or fold cylinder 10 and the counter-pressure cylinder 12 define a cutting location 19 between them, which corresponds to the closest place between these two cylinders 10, 12.
  • the blade cylinder 10 has a peripheral speed which is equal to the signature speed V 2 .
  • the speed of rotation of the counter-pressure cylinder 12 is adapted to the speed of the blade cylinder 10 so that a counter-pressure element 26 is always present when a blade 20 bears on the belt 4 in order to cut it.
  • the blade cylinder 10 has three blades 20 uniformly distributed over the circumference of the cylinder 10.
  • the blades 20 are fixed on the blade cylinder 10 in a retracted position in which the cutting edge of the blade 20 is recessed behind the circumference of the cylinder 10
  • Each blade 20 preferably extends uninterrupted over the entire axial width of the cutting band 4 or the blade cylinder 10.
  • the blade cylinder 10 is further provided with two protective blocks 22 of elastic material such as rubber which extend on either side of the blade 20 associated.
  • Clips 24 which are adapted to hold cut signatures 18 are also arranged on the blade cylinder 10.
  • the counter-pressure cylinder 12 comprises one or more counterpressure assemblies 25, each of which is provided with a plurality of counterpressure elements 26, which will be explained in detail below.
  • the folder 2 is provided with a plurality of first conveying elements, in the form of a first bank of first belts 28, which extend around the counterpressure cylinder 12, which are applied to a segment of the surface of the blade cylinder 10 and on a segment of the surface of the counter-pressure cylinder 12. These belts 28 are adapted to convey the web 4 and / or a cut-off signature 18 downstream of the cutting location 19.
  • Each first belt 28 has a round or rectangular cross section and a smooth or slightly rough transport surface. This smooth surface reduces smearing of the tape.
  • Each first belt 28 has a speed that is equal to or greater than the tape transport speed V 1 .
  • the first belts 28 are driven at a speed which is greater than the belt speed V 1 and equal to or less than the signature speed V 2 and in particular strictly less than the signature speed V 2 .
  • the traction of the belts 28 on the band 4 and on the signatures 18 is limited and cleans the paper.
  • the folder 2 further comprises a plurality of second conveying elements, in this case belts 30, which form a second belt bench.
  • belts 30 of the second belt bench are nested between the belts of the first belt bench 28 so that a signature head 18 can pass from the first belt bench 28 to the second belt bench 28. 30.
  • the belt speed of the second belt bench 30 being identical to the peripheral speed of the blade cylinder 10.
  • the protection blocks 22 are adapted to contribute to a protection on the one hand of the first belts 28 and secondly of the second belts 30 against wear by the blades 20.
  • these protective blocks 22 hold the paper strip 4 against the back pressure elements 26 at the time of cutting.
  • FIG. 5 is a perspective view of a detail of the counter-pressure cylinder 12. As can be seen, the counter-pressure elements 26 are arranged axially one behind the other in an aligned manner, and forming interstices 32 between them interstices 32 in which the first belts 28 engage when cutting the paper web 4.
  • Each set of back pressure 25 extends axially along the counter-pressure cylinder 12.
  • Each counterpressure element 26 has an axially extending cutting groove 34 into which the blade 20 engages during cutting.
  • a bearing surface 36 On each side of the groove 34 is disposed a bearing surface 36, which extends parallel to a tangent of the surface of the blade cylinder 10, and which receives the paper web 4 under the action of the protective blocks 22. at the moment of cutting.
  • the bearing surface 36 is shifted outwardly with respect to the surface of the blade cylinder 10.
  • Guide grooves 40 are provided in the counter-pressure cylinder 12. These grooves 40 are aligned with the interstices 32 and extend circumferentially around the cylinder 12. In these guide grooves 40 engage the belts 28.
  • the axial dimension of the gap 32 is chosen so that the strip 4 is cut by the blade 20 in the entire zone corresponding to the gap 32. Thus the strip 4 is cut across its width in a single surgery.
  • FIG 8 is shown a second embodiment of the folder according to the invention.
  • This folder 2 differs from that previously described by the following. Similar elements bear the same references.
  • the first belts 28 are wound on a segment of the blade cylinder 10 upstream of the cutting location 19, and are adapted to hold the web 4 in an area extending from the cutting location upstream, and this at the moment of cutting. Thus, the end of the band 4 that is created by the cut is maintained.
  • the first belts 28 completely surround the counter-pressure cylinder 12 and are deflected by three deflection rollers 50. Consequently, the first belts 28 come into contact with the counter-pressure cylinder 12 only in the defined zone. by the counter-pressure elements 26, or are out of contact over the entire circumference of the counter-pressure cylinder 12.
  • This embodiment facilitates the driving of the first belts 28 at a speed V 3 different from the belt speed V 1 or the signature speed V 2 .
  • the second belts 30 are not shown in this figure.
  • Figure 9 is shown a third embodiment of the folder according to the invention.
  • This folder 2 differs from the folder previously described by the following.
  • the first belts 28 apply, downstream of the cutting location 19, against the blade cylinder 10 on a segment which corresponds to approximately 170 °, that is to say to a transfer location of the signature 18 to the transfer cylinder 14.
  • the belts 28 thus extend around three return rollers 50.
  • the second belts 30 can be omitted, while ensuring a good guiding of the cut signature 18 to the vicinity of the transfer cylinder 14.
  • the counter-pressure cylinder 12 carries a plurality of counter-pressure assemblies 25 or counter-pressure elements 26 distributed around its circumference.
  • the blade cylinder 10 is adapted to be rotated so that its peripheral speed is greater than the speed V 1 of travel of the web 4 of material to be printed and is equal to the speed V 2 .
  • the blade cylinder 10 is adapted to be rotated so that its speed is equal to the running speed V 1 of the web 4 of material to be printed.
  • the speed V 2 is equal to the speed V 1 .
  • the back pressure assembly 25 and thus the counterpressure elements 26 are made in one piece, the gap 32 between two counterpressure elements being formed by a groove or guide groove of 28.
  • This variant facilitates assembly and manufacture of the folder.
  • the cutting groove 34 may be omitted.
  • the belts 28 can be replaced by another conveying element, for example a chain.

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Abstract

Conveying belt has a bank of continuous synchronizing belt loops. Loop goes around sinking on the groove of the counter-pressure cylinder (12) with cutting blocks separated by grooves. It passes the axial gap where the blades cooperate with the counter-pressure block. It proceeds underneath the blade cylinder (10). It loops back on series of rollers to return to the counter-pressure cylinder. It conveys the cut web and/or signature downstream of the cutting location (19). Synchronized blades and block cut the paper on their contact points without touching the belts. An independent claim is included for a rotary press.

Description

La présente invention concerne une plieuse, notamment pour presse rotative, adaptée pour plier des signatures, du type comprenant

  • un cylindre de lame muni d'au moins une lame adaptée pour couper une bande de matière à imprimer,
  • un cylindre de contre-pression muni d'au moins deux éléments de contre-pression qui définissent un interstice axial entre eux, la lame s'appliquant sur les deux éléments de contre-pression lors de la coupe,
  • un élément de convoyage qui s'étend autour du cylindre de contre-pression, qui entoure au moins partiellement le cylindre de lame, et qui est adapté pour convoyer la bande (4) et/ou une signature coupée de la bande au moins en aval de l'emplacement de coupe, et s'étendant dans l'interstice axial lorsque la lame coopère avec les éléments de contre-pression.
The present invention relates to a folder, in particular for a rotary press, adapted to fold signatures, of the type comprising
  • a blade cylinder provided with at least one blade adapted to cut a strip of material to be printed,
  • a counter-pressure cylinder provided with at least two counter-pressure elements which define an axial gap between them, the blade applying to the two counterpressure elements during cutting,
  • a conveying element which extends around the backpressure cylinder, which at least partially surrounds the blade cylinder, and which is adapted to convey the web (4) and / or a signature cut from the web at least downstream of the cutting location, and extending into the axial gap when the blade cooperates with the counter pressure elements.

On connaît du document EP-A-1 362 819 , une plieuse pour presse rotative qui comporte un cylindre de lame ou de coupe muni d'une lame adaptée pour couper une bande de matière à imprimer ainsi que de plusieurs éléments de contre-pression coopérants avec la lame et disposés de manière à former des interstices axiaux entre eux.Document is known EP-A-1 362 819 , a folding machine for a rotary press which comprises a blade or cutting cylinder provided with a blade adapted to cut a strip of material to be printed as well as several counter pressure elements cooperating with the blade and arranged so as to form interstices axial between them.

Des courroies de traction de bande s'étendent dans les interstices axiaux qui servent à guider la bande imprimée ou la signature découpée. Les courroies dentées comportent des éléments de contre-pression qui viennent se placer dans les interstices axiaux précités. La lame s'applique également sur les éléments de contre-pression des courroies lors de la coupe.Tape straps extend into the axial interstices that serve to guide the printed web or die cut signature. The timing belts comprise counterpressure elements which are placed in the aforementioned axial interstices. The blade also applies to the counterpressure elements of the belts during cutting.

Cette plieuse présente l'inconvénient que les courroies sont rapidement abîmées par la lame, et doivent être régulièrement changées.This folder has the disadvantage that the belts are quickly damaged by the blade, and must be regularly changed.

L'invention a pour but de pallier cet inconvénient et de proposer une plieuse qui ait des intervalles d'entretien plus importants.The invention aims to overcome this disadvantage and to propose a folder which has longer maintenance intervals.

A cet effet, l'invention a pour objet une plieuse telle qu'indiquée ci-dessus, caractérisée en ce que la lame s'étend par-dessus l'interstice axial, et en ce que l'élément de convoyage s'étend dans l'interstice axial à un écart de la lame lorsque la lame coopère avec les éléments de contre-pression.For this purpose, the invention relates to a folder as indicated above, characterized in that the blade extends over the axial gap, and in that the conveying element extends into the axial gap at a distance from the blade when the blade cooperates with the counter-pressure elements.

Selon des modes de réalisation particuliers, la plieuse selon l'invention comporte une ou plusieurs des caractéristiques suivantes:

  • la largeur axiale de l'interstice axial est choisie suffisamment petite pour que la bande soit coupée par la lame dans toute la zone correspondant à l'interstice axial ;
  • le cylindre de lame porte plusieurs lames réparties sur sa circonférence ;
  • le cylindre de lame comporte des dispositifs de préhension des signatures coupées, par exemple des pinces ;
  • le cylindre de lame est adapté pour être entraîné en rotation de telle sorte que sa vitesse périphérique est supérieure à la vitesse de défilement de la bande de matière à imprimer ;
  • le cylindre de lame est adapté pour être entraîné en rotation de telle sorte que sa vitesse périphérique est égale à la vitesse de défilement de la bande de matière à imprimer ;
  • le cylindre de contre-pression porte un, notamment un seul, ensemble d'éléments de contre-pression;
  • la ou chaque lame est rétractée derrière la surface enveloppante du cylindre de lame, et la ou chaque lame est entourée par des blocs de protection, notamment en caoutchouc, adaptés pour protéger l'élément de convoyage qui s'enroule sur le cylindre de lame ;
  • l'élément de convoyage comprend au moins une première courroie munie d'une surface de transport, notamment lisse, qui est tournée vers la bande de matière à imprimer lors du fonctionnement ;
  • la ou chaque première courroie a une section ronde ou rectangulaire ;
  • la ou chaque première courroie est enroulée sur le cylindre de lame en amont de l'emplacement de coupe et est adaptée pour maintenir la bande lors de la coupe ;
  • un unique banc d'une ou de plusieurs premières courroies entoure le cylindre de contre-pression et s'enroule également sur le cylindre de lame jusqu'à un emplacement de transfert de la signature, et ce banc est adapté pour transporter les signatures de l'emplacement de coupe jusqu'à l'emplacement de transfert ;
  • la plieuse comprend un premier banc de courroies constitué de plusieurs premières courroies qui entourent le cylindre de contre-pression et qui sont imbriqués avec un deuxième banc constitué de deuxièmes courroies, les deux bancs de courroies étant adaptés pour transférer une signature du premier banc de courroies au deuxième banc de courroies ;
  • le deuxième banc de courroies est enroulé sur le cylindre de lame et est adapté pour maintenir les signatures coupées sur la surface du cylindre de lame, la vitesse des courroies du deuxième banc de courroies étant identique à la vitesse tangentielle du cylindre de lame ;
  • la plieuse est adaptée pour entraîner chaque élément de convoyage à une vitesse qui est égale ou supérieure à la vitesse de transport de la bande ; et
  • la plieuse est adaptée pour entraîner chaque élément de convoyage à une vitesse qui est supérieure à la vitesse de transport de la bande et inférieure ou égale à la vitesse de transport des signatures, et notamment strictement inférieure à la vitesse de transport des signatures.
According to particular embodiments, the folder according to the invention comprises one or more of the following characteristics:
  • the axial width of the axial gap is chosen sufficiently small so that the strip is cut by the blade in the entire area corresponding to the axial gap;
  • the blade cylinder carries several blades distributed over its circumference;
  • the blade cylinder comprises gripping devices of the cut signatures, for example tongs;
  • the blade cylinder is adapted to be rotated so that its peripheral speed is greater than the running speed of the web of material to be printed;
  • the blade cylinder is adapted to be rotated so that its peripheral speed is equal to the running speed of the web of material to be printed;
  • the back-pressure cylinder carries a, in particular a single, set of counter-pressure elements;
  • the or each blade is retracted behind the enveloping surface of the blade cylinder, and the or each blade is surrounded by protective blocks, in particular of rubber, adapted to protect the conveying element which is wound on the blade cylinder;
  • the conveying element comprises at least a first belt provided with a transport surface, particularly smooth, which faces the band of material to be printed during operation;
  • the or each first belt has a round or rectangular section;
  • the or each first belt is wound on the blade cylinder upstream of the cutting location and is adapted to hold the belt during cutting;
  • a single bench of one or more first belts surrounds the backpressure cylinder and also winds on the blade cylinder to a signature transfer location, and this bench is adapted to carry the signatures of the cutting location to the transfer location;
  • the folder comprises a first belt bench consisting of a plurality of first belts surrounding the counterpressure cylinder and which are interlocked with a second bench consisting of second belts, the two belt benches being adapted to transfer a signature of the first belt bench; at the second belt bench;
  • the second belt bench is wound on the blade cylinder and is adapted to maintain the cut signatures on the surface of the blade cylinder, the belt speed of the second belt bench being identical to the tangential speed of the blade cylinder;
  • the folder is adapted to drive each conveyor element at a speed which is equal to or greater than the transport speed of the web; and
  • the folder is adapted to drive each conveying element at a speed which is greater than the transport speed of the web and less than or equal to speed of transport of the signatures, and in particular strictly lower than the speed of transport of the signatures.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels:

  • la figure 1 est une vue schématique de côté d'une plieuse selon l'invention ;
  • la figure 2 est une vue agrandie d'un détail de la figure 1;
  • les figures 3 et 4 montrent des détails agrandis de la figure 2, pendant les phases différentes de fonctionnement de la plieuse ;
  • la figure 5 est une vue en perspective d'une partie du cylindre de contre-pression et du cylindre de lame ;
  • la figure 6 est une vue de côté d'un détail du cylindre de lame et du cylindre de contre-pression, au moment de la coupe ;
  • la figure 7 est une vue schématique des bandes de convoyage ; et
  • les figures 8 et 9 sont des vues schématiques de côté de plieuses selon des deuxième et troisième modes de réalisation de l'invention.
The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the appended drawings, in which:
  • Figure 1 is a schematic side view of a folder according to the invention;
  • Figure 2 is an enlarged view of a detail of Figure 1;
  • Figures 3 and 4 show enlarged details of Figure 2, during the different phases of operation of the folder;
  • Figure 5 is a perspective view of a portion of the back pressure cylinder and the blade cylinder;
  • Figure 6 is a side view of a detail of the blade cylinder and the back pressure cylinder at the time of cutting;
  • Figure 7 is a schematic view of the conveyor belts; and
  • Figures 8 and 9 are schematic side views of folders according to second and third embodiments of the invention.

Sur la figure 1 est représentée une plieuse selon l'invention, désignée par la référence générale 2.In Figure 1 is shown a folder according to the invention, designated by the general reference 2.

Cette plieuse 2 est adaptée pour couper et plier une bande de matière à imprimer, telle qu'une bande de papier 4. La bande de papier 4 peut avoir une ou plusieurs couches. La bande 4 est entraînée avec une vitesse de bande V1.This folder 2 is adapted to cut and fold a strip of material to be printed, such as a paper strip 4. The paper strip 4 may have one or more layers. The band 4 is driven with a band speed V 1 .

La plieuse 2 est équipée de deux paires de cylindres de traction 6 et 8 de la bande 4. La plieuse 2 comporte un cylindre de lame ou de pli 10, un cylindre de contre-pression 12, un cylindre de transfert 14 ainsi que deux cylindres de transfert à pinces 16.The folder 2 is equipped with two pairs of traction rollers 6 and 8 of the strip 4. The folder 2 comprises a blade or fold cylinder 10, a counter-pressure cylinder 12, a transfer cylinder 14 and two cylinders transfer device 16.

La plieuse 2 est adaptée pour couper la bande 4 en des signatures 18 ou en des feuilles 18 et de transporter les signatures/feuilles avec une vitesse de signature V2 qui est de préférence supérieure à la vitesse de bande V1.The folder 2 is adapted to cut the web 4 into signatures 18 or sheets 18 and to transport the signatures / sheets with a signature speed V 2 which is preferably greater than the web speed V 1 .

A cet effet, le cylindre de lame ou cylindre de pli 10 et le cylindre de contre-pression 12 définissent un emplacement de coupe 19 entre eux, qui correspond à l'endroit le plus rapproché entre ces deux cylindres 10, 12. De plus, le cylindre de lame 10 a une vitesse périphérique qui est égale à la vitesse de signature V2. La vitesse de rotation du cylindre de contre-pression 12 est adaptée à la vitesse du cylindre de lame 10 de telle sorte qu'un élément de contre-pression 26 soit toujours présent lorsqu'une lame 20 s'appuie sur la bande 4 afin de la couper.For this purpose, the blade cylinder or fold cylinder 10 and the counter-pressure cylinder 12 define a cutting location 19 between them, which corresponds to the closest place between these two cylinders 10, 12. In addition, the blade cylinder 10 has a peripheral speed which is equal to the signature speed V 2 . The speed of rotation of the counter-pressure cylinder 12 is adapted to the speed of the blade cylinder 10 so that a counter-pressure element 26 is always present when a blade 20 bears on the belt 4 in order to cut it.

Le cylindre de lame 10 comporte trois lames 20 régulièrement réparties sur la circonférence du cylindre 10. Les lames 20 sont fixées sur le cylindre de lame 10 dans une position rétractée dans laquelle le tranchant de la lame 20 est en retrait derrière la circonférence du cylindre 10. Chaque lame 20 s'étend de préférence de manière ininterrompue sur toute la largeur axiale de la bande à couper 4 ou du cylindre de lame 10.The blade cylinder 10 has three blades 20 uniformly distributed over the circumference of the cylinder 10. The blades 20 are fixed on the blade cylinder 10 in a retracted position in which the cutting edge of the blade 20 is recessed behind the circumference of the cylinder 10 Each blade 20 preferably extends uninterrupted over the entire axial width of the cutting band 4 or the blade cylinder 10.

Pour chaque lame 20, le cylindre de lame 10 est en outre muni de deux blocs de protection 22 en matière élastique telle que du caoutchouc qui s'étendent de part et d'autre de la lame 20 associée.For each blade 20, the blade cylinder 10 is further provided with two protective blocks 22 of elastic material such as rubber which extend on either side of the blade 20 associated.

Des pinces 24 qui sont adaptées pour tenir des signatures coupées 18 sont également disposés sur le cylindre de lame 10.Clips 24 which are adapted to hold cut signatures 18 are also arranged on the blade cylinder 10.

Le cylindre de contre-pression 12 comporte un ou plusieurs ensembles de contre-pression 25 dont chacun est muni de plusieurs éléments de contre-pression 26, qui seront expliqués en détail plus loin.The counter-pressure cylinder 12 comprises one or more counterpressure assemblies 25, each of which is provided with a plurality of counterpressure elements 26, which will be explained in detail below.

La plieuse 2 est pourvue d'une pluralité de premiers éléments de convoyage, sous forme d'un premier banc de premières courroies 28, qui s'étendent autour du cylindre de contre-pression 12, qui s'appliquent sur un segment de la surface du cylindre de lame 10 et sur un segment de la surface du cylindre de contre-pression 12. Ces courroies 28 sont adaptés pour convoyer la bande 4 et/ou une signature coupée 18 en aval de l'emplacement de coupe 19. Chaque première courroie 28 comporte une section transversale ronde ou rectangulaire et une surface de transport lisse ou légèrement rugueuse. Cette surface lisse réduit le maculage de la bande. Chaque première courroie 28 a une vitesse qui est égale ou supérieure à la vitesse de transport de bande V1. Dans un mode préférentiel, les premières courroies 28 sont entraînées a une vitesse qui est supérieure à la vitesse de bande V1 et égale ou inférieure à la vitesse de signature V2 et notamment strictement inférieure à la vitesse de signature V2. Ainsi, la traction des courroies 28 sur la bande 4 et sur les signatures 18 est limitée et ménage le papier.The folder 2 is provided with a plurality of first conveying elements, in the form of a first bank of first belts 28, which extend around the counterpressure cylinder 12, which are applied to a segment of the surface of the blade cylinder 10 and on a segment of the surface of the counter-pressure cylinder 12. These belts 28 are adapted to convey the web 4 and / or a cut-off signature 18 downstream of the cutting location 19. Each first belt 28 has a round or rectangular cross section and a smooth or slightly rough transport surface. This smooth surface reduces smearing of the tape. Each first belt 28 has a speed that is equal to or greater than the tape transport speed V 1 . In a preferred embodiment, the first belts 28 are driven at a speed which is greater than the belt speed V 1 and equal to or less than the signature speed V 2 and in particular strictly less than the signature speed V 2 . Thus, the traction of the belts 28 on the band 4 and on the signatures 18 is limited and cleans the paper.

La plieuse 2 comporte en outre une pluralité de seconds éléments de convoyage, en l'occurrence des courroies 30, qui forment un second banc de courroies. Comme on le voit sur la figure 7, les courroies 30 du deuxième banc de courroies sont imbriquées entre les courroies du premier banc de courroies 28 de telle manière qu'une tête de signature 18 peut passer du premier banc de courroies 28 au deuxième banc de courroies 30. La vitesse des courroies du deuxième banc de courroies 30 étant identique à la vitesse périphérique du cylindre de lame 10.The folder 2 further comprises a plurality of second conveying elements, in this case belts 30, which form a second belt bench. As seen in FIG. 7, the belts 30 of the second belt bench are nested between the belts of the first belt bench 28 so that a signature head 18 can pass from the first belt bench 28 to the second belt bench 28. 30. The belt speed of the second belt bench 30 being identical to the peripheral speed of the blade cylinder 10.

Les blocs de protection 22 sont adaptés pour contribuer à une protection d'une part des premières courroies 28 et d'autre part des secondes courroies 30 contre une usure par les lames 20.The protection blocks 22 are adapted to contribute to a protection on the one hand of the first belts 28 and secondly of the second belts 30 against wear by the blades 20.

En outre, ces blocs de protection 22 maintiennent la bande de papier 4 en appui contre les éléments de contre-pression 26 au moment de la coupe.In addition, these protective blocks 22 hold the paper strip 4 against the back pressure elements 26 at the time of cutting.

Sur la figure 5 est montré en perspective un détail du cylindre de contre-pression 12. Comme on le voit, les éléments de contre-pression 26 sont disposés axialement les uns derrière les autres de manière alignée, et en formant des interstices 32 entre eux, interstices 32 dans lesquels s'engagent les premières courroies 28 lors de la coupe de la bande de papier 4.FIG. 5 is a perspective view of a detail of the counter-pressure cylinder 12. As can be seen, the counter-pressure elements 26 are arranged axially one behind the other in an aligned manner, and forming interstices 32 between them interstices 32 in which the first belts 28 engage when cutting the paper web 4.

Chaque ensemble de contre-pression 25 s'étend axialement le long du cylindre de contre-pression 12.Each set of back pressure 25 extends axially along the counter-pressure cylinder 12.

Chaque élément de contre-pression 26 comporte une rainure de coupe 34 s'étendant axialement, dans laquelle s'engage la lame 20 lors de la coupe. De chaque côté de la rainure 34 est disposée une surface d'appui 36, qui s'étend parallèlement à une tangente de la surface du cylindre de lame 10, et qui reçoit la bande de papier 4 sous l'action des blocs de protection 22 au moment de la coupe. De plus, la surface d'appui 36 est décalée vers l'extérieur par rapport à la surface du cylindre de lame 10. Des rainures de guidage 40 sont ménagées dans le cylindre de contre-pression 12. Ces rainures 40 sont alignées avec les interstices 32 et s'étendent circonférentiellement autour du cylindre 12. Dans ces rainures de guidage 40 s'engagent les courroies 28.Each counterpressure element 26 has an axially extending cutting groove 34 into which the blade 20 engages during cutting. On each side of the groove 34 is disposed a bearing surface 36, which extends parallel to a tangent of the surface of the blade cylinder 10, and which receives the paper web 4 under the action of the protective blocks 22. at the moment of cutting. In addition, the bearing surface 36 is shifted outwardly with respect to the surface of the blade cylinder 10. Guide grooves 40 are provided in the counter-pressure cylinder 12. These grooves 40 are aligned with the interstices 32 and extend circumferentially around the cylinder 12. In these guide grooves 40 engage the belts 28.

Comme il est illustré sur la figure 6, lorsque la lame 20 s'applique dans le fond de la rainure de coupe 34, elle traverse chaque interstice axial 32 et la courroie 28 s'étend dans l'interstice 32 à un écart radial e de la lame. Cet écart est de préférence 1 mm. En variante, cet écart est situé entre 0,5 mm et 1,5 mm. Ainsi, la lame 20 est hors contact de la courroie 28 pendant la totalité de l'opération de coupe, et la courroie 28 n'est pas endommagée par cette lame 20.As illustrated in FIG. 6, when the blade 20 is applied in the bottom of the cutting groove 34, it passes through each axial gap 32 and the belt 28 extends in the gap 32 at a radial distance e of the blade. This gap is preferably 1 mm. Alternatively, this difference is between 0.5 mm and 1.5 mm. Thus, the blade 20 is out of contact with the belt 28 during the entire cutting operation, and the belt 28 is not damaged by this blade 20.

Par ailleurs, la dimension axiale de l'interstice 32 est choisie de telle sorte que la bande 4 soit coupée par la lame 20 dans toute la zone correspondant à l'interstice 32. Ainsi la bande 4 est coupée sur toute sa largeur en une seule opération.Furthermore, the axial dimension of the gap 32 is chosen so that the strip 4 is cut by the blade 20 in the entire zone corresponding to the gap 32. Thus the strip 4 is cut across its width in a single surgery.

Sur la figure 8 est représenté un second mode de réalisation de la plieuse selon l'invention. Cette plieuse 2 diffère de celle précédemment décrite par ce qui suit. Les éléments analogues portent les mêmes références.In Figure 8 is shown a second embodiment of the folder according to the invention. This folder 2 differs from that previously described by the following. Similar elements bear the same references.

Les premières courroies 28 sont enroulées sur un segment du cylindre de lame 10 en amont de l'emplacement de coupe 19, et sont adaptées pour maintenir la bande 4 dans une zone s'étendant de l'emplacement de coupe vers l'amont, et ceci au moment de la coupe. Ainsi, l'extrémité de la bande 4 qui est créée par la coupe est maintenue. En outre, les premières courroies 28 entourent complètement le cylindre de contre-pression 12 et sont déviées par trois galets de déviation 50. En conséquence, les premières courroies 28 ne sont en contact avec le cylindre de contre-pression 12 que dans la zone définie par les éléments de contre-pression 26, ou sont hors contact sur toute la circonférence du cylindre de contre-pression 12.The first belts 28 are wound on a segment of the blade cylinder 10 upstream of the cutting location 19, and are adapted to hold the web 4 in an area extending from the cutting location upstream, and this at the moment of cutting. Thus, the end of the band 4 that is created by the cut is maintained. In addition, the first belts 28 completely surround the counter-pressure cylinder 12 and are deflected by three deflection rollers 50. Consequently, the first belts 28 come into contact with the counter-pressure cylinder 12 only in the defined zone. by the counter-pressure elements 26, or are out of contact over the entire circumference of the counter-pressure cylinder 12.

Ce mode de réalisation facilite l'entraînement des premières courroies 28 à une vitesse V3 différente de la vitesse de bande V1 ou de la vitesse de signature V2.This embodiment facilitates the driving of the first belts 28 at a speed V 3 different from the belt speed V 1 or the signature speed V 2 .

Les secondes courroies 30 ne sont pas représentées sur cette figure.The second belts 30 are not shown in this figure.

Sur la figure 9 est représenté un troisième mode de réalisation de la plieuse selon l'invention.In Figure 9 is shown a third embodiment of the folder according to the invention.

Cette plieuse 2 diffère de la plieuse précédemment décrite par ce qui suit.This folder 2 differs from the folder previously described by the following.

Les premières courroies 28 s'appliquent, en aval de l'emplacement de découpe 19, contre le cylindre de lame 10 sur un segment qui correspond à environ 170°, c'est-à-dire jusqu'à un emplacement de transfert de la signature 18 au cylindre de transfert 14. Les courroies 28 s'étendent ainsi autour de trois galets de renvoi 50.The first belts 28 apply, downstream of the cutting location 19, against the blade cylinder 10 on a segment which corresponds to approximately 170 °, that is to say to a transfer location of the signature 18 to the transfer cylinder 14. The belts 28 thus extend around three return rollers 50.

Grâce à ce mode de réalisation, les secondes courroies 30 peuvent être omises, tout en assurant un bon guidage de la signature découpée 18 jusqu'au voisinage du cylindre de transfert 14.Thanks to this embodiment, the second belts 30 can be omitted, while ensuring a good guiding of the cut signature 18 to the vicinity of the transfer cylinder 14.

En variante non représentée, le cylindre de contre-pression 12 porte plusieurs ensembles de contre-pression 25 ou éléments de contre-pression 26 répartis sur sa circonférence.In a variant that is not shown, the counter-pressure cylinder 12 carries a plurality of counter-pressure assemblies 25 or counter-pressure elements 26 distributed around its circumference.

Pendant le fonctionnement, le cylindre de lame 10 est adapté pour être entraîné en rotation de telle sorte que sa vitesse périphérique est supérieure à la vitesse V1 de défilement de la bande 4 de matière à imprimer et est égale à la vitesse V2.During operation, the blade cylinder 10 is adapted to be rotated so that its peripheral speed is greater than the speed V 1 of travel of the web 4 of material to be printed and is equal to the speed V 2 .

En variante, le cylindre de lame 10 est adapté pour être entraîné en rotation de telle sorte que sa vitesse est égale à la vitesse de défilement V1 de la bande 4 de matière à imprimer. Dans ce cas, la vitesse V2 est égale à la vitesse V1.As a variant, the blade cylinder 10 is adapted to be rotated so that its speed is equal to the running speed V 1 of the web 4 of material to be printed. In this case, the speed V 2 is equal to the speed V 1 .

De préférence, l'ensemble de contre-pression 25 et donc les éléments de contre-pression 26 sont fabriqués d'une seule pièce, l'interstice 32 entre deux éléments de contre-pression étant formé par une gorge ou une rainure de guidage des courroies 28. Cette variante facilite le montage et la fabrication de la plieuse.Preferably, the back pressure assembly 25 and thus the counterpressure elements 26 are made in one piece, the gap 32 between two counterpressure elements being formed by a groove or guide groove of 28. This variant facilitates assembly and manufacture of the folder.

En outre, la rainure de coupe 34 peut être omise.In addition, the cutting groove 34 may be omitted.

Il va de soi que les courroies 28 peuvent être remplacées par un autre élément de convoyage, par exemple une chaîne.It goes without saying that the belts 28 can be replaced by another conveying element, for example a chain.

Claims (16)

Plieuse, notamment pour presse rotative, adaptée pour plier des signatures, du type comprenant - un cylindre de lame (10) muni d'au moins une lame (20) adaptée pour couper une bande (4) de matière à imprimer, - un cylindre de contre-pression (12) muni d'au moins deux éléments de contre-pression (26) qui définissent un interstice axial (32) entre eux, la lame (20) s'appliquant sur les deux éléments de contre-pression (26) lors de la coupe, - un élément de convoyage (28) qui s'étend autour du cylindre de contre-pression (12), qui entoure au moins partiellement le cylindre de lame (10), et qui est adapté pour convoyer la bande (4) et/ou une signature coupée de la bande (4) au moins en aval de l'emplacement de coupe (19), et s'étendant dans l'interstice axial (32) lorsque la lame (20) coopère avec les éléments de contre-pression (26), caractérisée en ce que la lame (20) s'étend par-dessus l'interstice axial (32), et en ce que l'élément de convoyage (28) s'étend dans l'interstice axial (32) à un écart (e) de la lame (20) lorsque la lame (20) coopère avec les éléments de contre-pression (26). Folder, in particular for rotary press, adapted to fold signatures, of the type comprising a blade cylinder (10) provided with at least one blade (20) adapted to cut a strip (4) of material to be printed, a counter-pressure cylinder (12) provided with at least two counter-pressure elements (26) which define an axial gap (32) between them, the blade (20) applying to the two counter-pressure elements pressure (26) during cutting, - a conveying element (28) which extends around the counter-pressure cylinder (12), which at least partially surrounds the blade cylinder (10), and which is adapted to convey the belt (4) and / or a signature cut off from the web (4) at least downstream of the cutting location (19), and extending into the axial gap (32) when the blade (20) cooperates with the counter pressure elements ( 26), characterized in that the blade (20) extends over the axial gap (32), and in that the conveying element (28) extends in the axial gap (32) to a gap (e) of the blade (20) when the blade (20) cooperates with the counter-pressure elements (26). Plieuse selon la revendication 1, caractérisée en ce que la largeur axiale de l'interstice axial (32) est choisie suffisamment petite pour que la bande (4) soit coupée par la lame (20) dans toute la zone correspondant à l'interstice axial (32).Folder according to claim 1, characterized in that the axial width of the axial gap (32) is chosen to be sufficiently small so that the strip (4) is cut by the blade (20) throughout the region corresponding to the axial gap. (32). Plieuse selon l'une quelconque des revendications précédentes, caractérisée en ce que le cylindre de lame (10) porte plusieurs lames (20) réparties sur sa circonférence.Folder according to any one of the preceding claims, characterized in that the blade cylinder (10) carries a plurality of blades (20) distributed around its circumference. Plieuse selon l'une quelconque des revendications précédentes, caractérisée en ce que le cylindre de lame (10) comporte des dispositifs de préhension (24) des signatures coupées, par exemple des pinces.Folder according to any one of the preceding claims, characterized in that the blade cylinder (10) comprises gripping devices (24) cut signatures, for example clamps. Plieuse selon l'une quelconque des revendications précédentes, caractérisée en ce que le cylindre de lame (10) est adapté pour être entraîné en rotation de telle sorte que sa vitesse périphérique est supérieure à la vitesse de défilement (V1) de la bande (4) de matière à imprimer.Folder according to any one of the preceding claims, characterized in that the blade cylinder (10) is adapted to be rotated so that its peripheral speed is greater than the running speed (V1) of the web (4). ) of material to be printed. Plieuse selon l'une quelconque des revendications précédentes, caractérisée en ce que le cylindre de lame (10) est adapté pour être entraîné en rotation de telle sorte que sa vitesse périphérique est égale à la vitesse de défilement de la bande (4) de matière à imprimer.Folder according to any one of the preceding claims, characterized in that the blade cylinder (10) is adapted to be rotated so that its peripheral speed is equal to the running speed of the web (4) of material to be printed. Plieuse selon l'une quelconque des revendications précédentes, caractérisée en ce que le cylindre de contre-pression (12) porte un, notamment un seul, ensemble d'élément (25) de contre-pression (26).Folder according to any one of the preceding claims, characterized in that the counter-pressure cylinder (12) carries one, in particular a single, counter-pressure element assembly (25) (26). Plieuse selon l'une quelconque des revendications précédentes, caractérisée en ce que la ou chaque lame (20) est rétractée derrière la surface enveloppante du cylindre de lame (10), et en ce que la ou chaque lame (20) est entourée par des blocs de protection (22), notamment en caoutchouc, adaptés pour protéger l'élément de convoyage (28) qui s'enroule sur le cylindre de lame (10).Folder according to any one of the preceding claims, characterized in that the or each blade (20) is retracted behind the enveloping surface of the blade cylinder (10), and in that the or each blade (20) is surrounded by protective blocks (22), in particular of rubber, adapted to protect the conveying element (28) which is wound on the blade cylinder (10). Plieuse selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de convoyage comprend au moins une première courroie (28) munie d'une surface de transport, notamment lisse, qui est tournée vers la bande (4) de matière à imprimer lors du fonctionnement.Folder according to any one of the preceding claims, characterized in that the conveying element comprises at least a first belt (28) provided with a transport surface, in particular a smooth surface, which is turned towards the belt (4) of material to print during operation. Plieuse selon la revendication 9, caractérisée en ce que la ou chaque première courroie (28) a une section ronde ou rectangulaire.Folder according to claim 9, characterized in that the or each first belt (28) has a round or rectangular section. Plieuse selon la revendication 9 ou 10, caractérisée en ce que l'élément de convoyage (28) est enroulée sur le cylindre de lame (10) en amont de l'emplacement de coupe et est adaptée pour maintenir la bande (4) lors de la coupe.Folder according to claim 9 or 10, characterized in that the conveying element (28) is wound on the blade cylinder (10) upstream of the cutting location and is adapted to hold the strip (4) during the cup. Plieuse selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un unique banc d'une ou de plusieurs premiers éléments de convoyage (28) s'enroule sur le cylindre de lame (10) jusqu'à un emplacement de transfert de la signature, et en ce que ce banc est adapté pour transporter les signatures de l'emplacement de coupe jusqu'à l'emplacement de transfert.Folder according to any one of the preceding claims, characterized in that a single bench of one or more first conveying elements (28) is wound on the blade cylinder (10) to a transfer location. the signature, and in that this bench is adapted to transport the signatures of the cutting location to the transfer location. Plieuse selon l'une quelconque des revendications 1 à 11, caractérisée en ce que la plieuse comprend un premier banc d'éléments de convoyage constitué de plusieurs premiers éléments de convoyage (28) qui entourent le cylindre de contre-pression et qui sont imbriqués avec un deuxième banc d'éléments de convoyage constitué de deuxièmes éléments de convoyage (30), les deux bancs d'éléments de convoyage étant adaptés pour transférer une signature du premier banc d'éléments de convoyage au deuxième banc d'éléments de convoyage.Folder according to any one of claims 1 to 11, characterized in that the folder comprises a first conveyor element bench consisting of several first conveying elements (28) which surround the backpressure cylinder and which are interlocked with a second conveyor element bench consisting of second conveying elements (30), the two conveyor element banks being adapted to transfer a signature of the first conveyor element bench to the second conveyor element bench. Plieuse selon la revendication 13, caractérisée en ce que le deuxième banc d'éléments de convoyage est enroulé sur le cylindre de lame (10) et est adapté pour maintenir les signatures coupées sur la surface du cylindre de lame (10), la vitesse des éléments de convoyage du deuxième banc d'éléments de convoyage (30) étant identique à la vitesse tangentielle du cylindre de lame (10).Folder according to claim 13, characterized in that the second conveyor element bench is wound on the blade cylinder (10) and is adapted to hold the cut signatures on the surface of the blade cylinder (10), the speed of the conveying elements of the second conveyor element bench (30) being identical to the tangential speed of the blade cylinder (10). Plieuse selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle est adaptée pour entraîner chaque élément de convoyage (28) à une vitesse (V3) qui est égale ou supérieure à la vitesse de transport de la bande (V1).Folder according to any one of the preceding claims, characterized in that it is adapted to drive each conveying element (28) at a speed (V3) which is equal to or greater than the transport speed of the web (V1). Plieuse selon l'une quelconque des revendications 1 à 15, caractérisée en ce qu'elle
est adaptée pour entraîner chaque élément de convoyage (28) à une vitesse qui est supérieure à la vitesse de transport de la bande (V1) et inférieure ou égale à la vitesse de transport des signatures (V2) et notamment strictement inférieure à la vitesse de transport des signatures (V2).Folder according to one of Claims 1 to 15, characterized in that
is adapted to drive each conveying element (28) at a speed which is greater than the transport speed of the belt (V1) and less than or equal to the signature transport speed (V2) and in particular strictly less than the signature transport speed (V 2 ).
EP20060291856 2005-12-27 2006-12-01 Folding machine Ceased EP1803673B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0513382A FR2895386B1 (en) 2005-12-27 2005-12-27 FOLDING

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EP1803673B1 EP1803673B1 (en) 2010-03-03

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US7594884B2 (en) 2009-09-29
EP1803673B1 (en) 2010-03-03
CN101007606B (en) 2011-12-07
CN101007606A (en) 2007-08-01
FR2895386A1 (en) 2007-06-29
US20070144324A1 (en) 2007-06-28
JP2007176705A (en) 2007-07-12
FR2895386B1 (en) 2008-04-04
DE602006012610D1 (en) 2010-04-15

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