EP2003079A1 - Table for a folder and related folding device. - Google Patents

Table for a folder and related folding device. Download PDF

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Publication number
EP2003079A1
EP2003079A1 EP20080104364 EP08104364A EP2003079A1 EP 2003079 A1 EP2003079 A1 EP 2003079A1 EP 20080104364 EP20080104364 EP 20080104364 EP 08104364 A EP08104364 A EP 08104364A EP 2003079 A1 EP2003079 A1 EP 2003079A1
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EP
European Patent Office
Prior art keywords
opening
application
suction
openings
table according
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
EP20080104364
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German (de)
French (fr)
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EP2003079B1 (en
Inventor
Franck Chagnon
Philippe Herda
Thierry Melon
Jérôme PERES
Eric Pierda
Jean-François Robert
Mathieu Rossi
Thierry Vauchelle
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Goss International Montataire SA
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Goss International Montataire SA
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Publication date
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Publication of EP2003079A1 publication Critical patent/EP2003079A1/en
Application granted granted Critical
Publication of EP2003079B1 publication Critical patent/EP2003079B1/en
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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
    • B65H45/18—Oscillating or reciprocating blade folders
    • 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
    • Y10T83/727—With means to guide moving work
    • Y10T83/739—Positively confines or otherwise determines path of work

Definitions

  • angle bend devices used in printing presses are known in the state of the art.
  • Such an angle fold device is for example known from the document FR-A-2,546,818 .
  • These square fold devices comprise a folding table provided with a longitudinal slot through which signatures or notebooks are pushed during folding by means of a folding blade.
  • the folding table has an application surface on which the signatures to be folded apply.
  • the application surface is provided with a plurality of suction openings which serve to maintain the signature against the table.
  • the object of the invention is to increase the quality of folding signatures, especially at high folding speeds and low paper weight.
  • the object of the invention is a table for an angle-folding device of the type indicated, characterized in that the table comprises guide means adapted to urge the product to be folded towards the first guide surface which are provided with a first main suction opening opening on the first guide surface.
  • FIG. 1 On the Figure 1 , is shown a right angle fold device according to the invention, designated by the general reference 2.
  • the device 2 is shown schematically and in section.
  • the right-angle fold device 2 carries a right-angle fold blade 4, two folding rollers 6, 8 and a right-angle fold table 10.
  • the right-angle fold device 2 further comprises a plurality of belts conveying 12.
  • the right-angle fold blade 4 extends along a PL blade plane and is movable along this PL blade plane alternately between a position for passing signatures and a signature folding position. On the Figure 1 The folding position of the blade 4 is shown. The right-angle fold blade 4 is driven between these two positions by a not shown drive device.
  • the folding rollers 6, 8 are rotatable about two proper axes X-X.
  • the two X-X axes are parallel, so that the folding rollers 6, 8 define a signature folding gap 14 therebetween.
  • the conveyor belts 12 are arranged in two rows, parallel to each other and the two rows define a transport gap 16 between them.
  • the conveyor belts 12 convey signatures 17 to be folded (see FIG. Figure 2 ).
  • the signatures 17 may be replaced by other products to be folded, such as notebooks or sheets.
  • the paper of the products to be folded has a basis weight of between 40 m / m 2 and 130 g / m 2 .
  • the signatures 17 are conveyed by the belts 12 in a conveying direction S.
  • the conveyor belts 12 are adapted to convey the signatures 17 to a folding position.
  • the angle fold table 10 comprises a base plate 18 provided with an application surface 20 on which the signatures 17 to be folded apply.
  • This application surface 20 defines an application plane PA, extending perpendicular to the PL blade plane.
  • the base plate 18 defines a folding opening 22 extending parallel to the conveying direction S.
  • the length of the folding opening 22, measured in the conveying direction S, is at least equal to the length of the signatures 17.
  • the folding table 10 further defines a front portion 24 and a rear portion 26 in the conveying direction S.
  • the application surface 20 is divided into two surface halves 20A, 20B which are separated by a separation plane formed by the PL blade plane.
  • the angle fold table 10 is further provided with a first 28 and a second 30 guide portions.
  • the guide portions 28, 30 are arranged adjacent to the folding opening 22 and delimit it.
  • the first guide portion 28 has a first guide surface 32
  • the second guide portion 30 has a second guide surface 34.
  • Each of the guide surfaces 32, 34 is inclined with respect to the application plane PA.
  • each of the first 32 and second 34 guide surfaces has a curved cross section, especially in a circular arc.
  • the angle fold table 10 comprises guide means adapted to urge the signature 17 during folding on the one hand towards the first guide surface 32 and on the other hand towards the second guide surface 34.
  • the square fold table 10 has a first main suction opening 36 ( Figure 2 ) opening onto the first guide surface 32 and a second main suction opening 38 (see Figure 3 ) opening onto the second guide surface 34.
  • Each main suction opening 36, 38 is an oblong recess extending in the conveying direction S and having a given length L1, measured in the conveying direction S.
  • the main suction openings 36, 38 are arranged exclusively in a front half of the guide portion 28, 30 associated.
  • the angle fold table 10 is further provided with a first 40 and a second 42 main air duct opening into the associated main suction opening 36, 38.
  • the first guide portion 28 comprises a first suction auxiliary opening 44 and the second guide portion 30 has a second suction auxiliary opening 46.
  • Each suction auxiliary opening 44, 46 is offset from the main opening of the suction port 44. associated suction 36, 38, and this upstream of the conveying direction S. In this case, each auxiliary suction opening 44, 46 is disposed in an upstream half of the associated guide portion 28, 30.
  • Each auxiliary suction opening 44, 46 has a length L2 measured in the conveying direction S. This length L2 is less than the length L1. With this feature, the signature is better guided in a head zone than at a tail area. In addition, since the length of the signature may vary from one series of signatures to another, the auxiliary suction openings 44, 46 are always completely covered by a signature regardless of its length.
  • the folding rollers 6, 8 may include local release grooves of the signature.
  • the main openings 36, 38 and auxiliary 44, 46 are aligned in the direction S with the local release grooves.
  • the angle fold table 10 further comprises two auxiliary air ducts 48, each of these ducts opening into the associated auxiliary suction opening 44, 46, as can be seen in FIG. Figure 3 .
  • the locations of the mouths of the main air ducts 40, 42 and auxiliary 48 are disposed at the ends of the main suction openings 36, 38 and suction auxiliary 44, 46 directed toward each other. This makes it possible to suck the signatures 17 over a long axial length while keeping a small length of the conduits
  • the main suction openings 36, 38 and the auxiliary suction openings 44, 46 are disposed at associated guide portion locations 28, 30 having an inclination of less than 45 ° with respect to the application surface 20.
  • the angle fold table 10 further comprises suction and application openings 50 opening onto the application surface 20.
  • the suction and application openings 50 are grouped into several opening groups G1, G2, G3, G4, illustrated on the Figure 5 .
  • Each of the opening groups G1, G2, G3, G4 extends over an area of the application surface 20.
  • the zones defined by the groups G1 to G4 are arranged on the same half 20A or 20B of the surface of 20.
  • Each suction and application opening 50 of a group of openings G1 to G4 considered opens into the same vacuum chamber 52 (see FIG. Figure 4 ) delimited by a vacuum box 54.
  • the vacuum box 54 comprises four vacuum chambers 52.
  • each half 20A and 20B of the surface is provided with a group G1 to G4 of openings 50.
  • the vacuum box 54 also defines a vacuum chamber 53 into which the main suction lines 40, 42 and auxiliary 48 open.
  • Each vacuum chamber 52 is provided with an individual suction connector 56 separate from the suction connector 56 of the other vacuum chambers 52.
  • the groups G1 and G2 are offset from groups G3 and G4 in the direction of the length of the table, namely in the direction of conveying S.
  • the groups G2 and G4 are shifted from the groups G1 and G3 in the direction of the width of the table, ie perpendicular to the conveying direction S.
  • the angle fold table 10 is further provided with a vacuum device (see Figure 1 ), comprising a vacuum pump 60 connected to a collecting pipe 62.
  • the collecting pipe 62 is connected by stitching connections 64 to each of the individual connections 56 and to each of the air ducts 40, 42.
  • the device according to the invention operates in the following manner.
  • the signatures to be folded 17 are conveyed according to the conveying direction S by the conveying belts 12. As soon as the signature 17 covers the openings 50, it is urged against the application surface 20 of the base plate 18. Next, the angle fold blade 4 is brought into its folding position and pushes the central part of the signature 17 through the folding opening 22. The central part of the signature 17 is grasped by the folding rollers 6, 8 and is driven down. During this operation, the central part of the signature 17 is held against the guide surfaces 32, 34. The signature 17 is kept pressed against the guide portions 28, 30 until lateral edges of the signature 17 cross. the main openings 36, 38 and auxiliary 44,46.
  • the lateral edges of the signature 17 are not released abruptly and therefore do not exert "whiplash" just before their passage between the rollers 6, 8.
  • the folding rate can be high without generating damage to the signatures 17, even if these signatures 17 comprise paper with a low basis weight.

Abstract

The table has an application surface of products e.g. signatures (17) extending along an application plane. A folding opening (22) is crossed by the products to be folded. A guiding portion (28) is placed adjacent to the opening, and includes a guiding surface (32) inclined with respect to the application plane. A guiding unit forces the products towards the guiding surface, and a main suction opening (36) emerges on the guiding surface. Guiding portion is placed adjacent to the guiding portion and opposite to the guiding portion (22).

Description

La présente invention concerne une table pour dispositif de pli d'équerre, du type comprenant

  • une surface d'application de produits à plier, la surface d'application s'étendant selon un plan d'application ,
  • une ouverture de pliage adaptée pour être traversée par les produits à plier,
  • au moins une première portion de guidage disposée adjacente à l'ouverture de pliage et comprenant une première surface de guidage inclinée par rapport au plan d'application.
The present invention relates to a table for an angle fold device, of the type comprising
  • a product application surface to be folded, the application surface extending according to an application plane,
  • a folding opening adapted to be traversed by the products to be folded,
  • at least one first guide portion disposed adjacent the folding opening and comprising a first guide surface inclined with respect to the application plane.

On connaît dans l'état de la technique des dispositifs de pli d'équerre utilisés dans des presses d'impression. Un tel dispositif de pli d'équerre est par exemple connu du document FR-A-2 546 818 . Ces dispositifs de pli d'équerre comportent une table de pliage munie d'une fente longitudinale à travers laquelle des signatures ou des cahiers sont poussés lors du pliage au moyen d'une lame de pliage.Known angle bend devices used in printing presses are known in the state of the art. Such an angle fold device is for example known from the document FR-A-2,546,818 . These square fold devices comprise a folding table provided with a longitudinal slot through which signatures or notebooks are pushed during folding by means of a folding blade.

La table de pliage comporte une surface d'application sur laquelle s'appliquent les signatures à plier. La surface d'application est munie d'une pluralité d'ouvertures d'aspiration qui servent à maintenir la signature contre la table.The folding table has an application surface on which the signatures to be folded apply. The application surface is provided with a plurality of suction openings which serve to maintain the signature against the table.

On a constaté que le dispositif de pli d'équerre connu conduit à des défauts de pliage, notamment sur les bords extérieurs des signatures lorsque la vitesse de pliage est importante.It has been found that the known cross-ply device leads to bending defects, in particular on the outer edges of the signatures when the bending speed is important.

Ces défauts apparaissent majoritairement, mais pas exclusivement, lorsque le grammage du papier utilisé pour les signatures est faible.These defects appear mainly, but not exclusively, when the paper weight used for the signatures is low.

L'invention a pour but d'augmenter la qualité de pliage des signatures, notamment à des vitesses de pliage élevées et à faible grammage du papier.The object of the invention is to increase the quality of folding signatures, especially at high folding speeds and low paper weight.

A cet effet, l'invention a pour objet une table pour dispositif de pli d'équerre du type indiqué, caractérisée en ce que la table comprend des moyens de guidage adaptés pour solliciter le produit à plier vers la première surface de guidage qui sont munis d'une première ouverture principale d'aspiration débouchant sur la première surface de guidage.For this purpose, the object of the invention is a table for an angle-folding device of the type indicated, characterized in that the table comprises guide means adapted to urge the product to be folded towards the first guide surface which are provided with a first main suction opening opening on the first guide surface.

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

  • la table comprend une deuxième portion de guidage disposée adjacente à l'ouverture de pliage et en vis-à-vis de la première portion de guidage, cette deuxième portion de guidage comprenant une deuxième surface de guidage inclinée par rapport au plan d'application, et la table comprend une deuxième ouverture principale d'aspiration débouchant sur la deuxième surface de guidage ;
  • la table définit une partie avant et une partie arrière selon un sens de déplacement d'un produit à plier sur la table, et en ce que la ou chaque ouverture principale d'aspiration est disposée dans une moitié avant de la portion de guidage associée ;
  • la ou chaque portion de guidage comprend une ouverture auxiliaire d'aspiration, et cette ouverture auxiliaire d'aspiration est décalée de l'ouverture d'aspiration principale ;
  • la ou chaque ouverture auxiliaire d'aspiration a une longueur inférieure à une longueur de l'ouverture principale d'aspiration associée ;
  • la table comprend, pour chaque ouverture principale d'aspiration, un conduit d'air principal, débouchant dans l'ouverture principale d'aspiration associée, et un conduit d'air auxiliaire, débouchant dans l'ouverture auxiliaire d'aspiration associée, et les emplacements des embouchures des conduits d'air principal et auxiliaire sont disposés à des extrémités des ouvertures principal et auxiliaire d'aspiration dirigées l'une vers l'autre ;
  • la ou chaque ouverture principale ou, le cas échéant auxiliaire, d'aspiration est située à un emplacement de la surface de guidage associée ayant une inclinaison de moins de 45° par rapport à la surface d'application ;
  • la ou chaque surface de guidage a une section transversale courbe, notamment en arc de cercle ;
  • la surface d'application comporte deux moitiés séparées par un plan de séparation, et la table comporte un premier groupe d'ouvertures d'aspiration et d'application s'étendant sur une première zone de la surface d'application et un deuxième groupe d'ouvertures d'aspiration et d'application s'étendant sur une deuxième zone de la surface d'application, la deuxième zone est disposée sur la même moitié de la surface d'application que la première zone, et chaque groupe d'ouvertures d'application est muni d'un raccord d'aspiration individuel ;
  • chaque groupe d'ouvertures d'application comporte une chambre à vide dans laquelle débouchent les ouvertures d'application du groupe d'ouvertures associé et dans laquelle débouche le raccord d'aspiration associé ;
  • la première et la deuxième zones sont décalées l'une de l'autre dans le sens de la longueur ;
  • la première et la deuxième zones sont décalées l'une de l'autre dans le sens de la largeur ;
  • la table comporte un dispositif à vide raccordé à l'une ou à chacune des ouvertures principale et/ou auxiliaire d'aspiration ; et
  • un dispositif à vide d'application est raccordé aux ouvertures de chacun des groupes d'ouvertures.
    L'invention a en outre pour objet un dispositif de pli d'équerre, du type comprenant
  • une lame de pli d'équerre,
  • deux rouleaux plieurs, et
  • une table de pli d'équerre,
caractérisé en ce que la table de pli d'équerre est une table telle que définie ci-dessus.According to particular embodiments, the table according to the invention comprises one or more of the following characteristics:
  • the table comprises a second guiding portion disposed adjacent to the folding opening and facing the first guiding portion, this second guiding portion comprising a second guiding surface inclined with respect to the application plane, and the table comprises a second main suction opening opening on the second guide surface;
  • the table defines a front portion and a rear portion in a direction of movement of a product to be folded on the table, and in that the or each main suction opening is disposed in a front half of the associated guide portion;
  • the or each guide portion comprises an auxiliary suction opening, and this auxiliary suction opening is offset from the main suction opening;
  • the or each auxiliary suction opening has a length less than a length of the associated main suction opening;
  • the table comprises, for each main suction opening, a main air duct, opening into the associated main suction opening, and an auxiliary air duct, opening into the associated auxiliary suction opening, and the locations of the mouths of the main and auxiliary air ducts are disposed at ends of the main and auxiliary suction openings directed towards each other;
  • the or each main or, where appropriate, auxiliary suction opening is located at a location of the associated guide surface having an inclination of less than 45 ° with respect to the application surface;
  • the or each guide surface has a curved cross section, in particular in a circular arc;
  • the application surface comprises two halves separated by a separation plane, and the table comprises a first group of suction and application openings extending over a first area of the application surface and a second group of suction and application openings extending over a second zone of the application surface, the second zone is disposed on the even half of the application area as the first area, and each group of application openings is provided with an individual suction connection;
  • each group of application apertures comprises a vacuum chamber into which the application apertures of the associated group of apertures open and into which the associated suction connection opens;
  • the first and second zones are offset from one another in the lengthwise direction;
  • the first and second zones are offset from one another in the width direction;
  • the table comprises a vacuum device connected to one or to each of the main and / or auxiliary suction openings; and
  • an application vacuum device is connected to the openings of each of the groups of openings.
    The invention furthermore relates to a right-angle folding device, of the type comprising
  • a square fold blade,
  • two folding rollers, and
  • a square fold table,
characterized in that the square fold table is a table as defined above.

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

  • la Figure 1 est une vue schématique en coupe d'un dispositif de pli d'équerre suivant l'invention ;
  • la Figure 2 est une vue en perspective d'une partie d'une table de pli d'équerre du dispositif de la Figure 1 ;
  • la Figure 3 est vue en perspective d'un détail à plus grande échelle de la table selon l'invention ;
  • la Figure 4 est une vue en perspective, la table étant coupée selon le plan IV-IV de la Figure 2 ; et
  • la Figure 5 est une vue de dessus de la table de pli d'équerre selon l'invention.
The present 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:
  • the Figure 1 is a schematic sectional view of a right-angle fold device according to the invention;
  • the Figure 2 is a perspective view of a part of a square fold table of the device of the Figure 1 ;
  • the Figure 3 is a perspective view of a larger scale detail of the table according to the invention;
  • the Figure 4 is a perspective view, the table being cut according to the plane IV-IV of the Figure 2 ; and
  • the Figure 5 is a top view of the square fold table according to the invention.

Sur la Figure 1, est représenté un dispositif de pli d'équerre selon l'invention, désigné par la référence générale 2. Le dispositif 2 est représenté schématiquement et en coupe.On the Figure 1 , is shown a right angle fold device according to the invention, designated by the general reference 2. The device 2 is shown schematically and in section.

Le dispositif de pli d'équerre 2 porte une lame de pli d'équerre 4, deux rouleaux de pliage 6, 8 et une table de pli d'équerre 10. Le dispositif de pli d'équerre 2 comporte en outre une multitude de courroies de convoyage 12.The right-angle fold device 2 carries a right-angle fold blade 4, two folding rollers 6, 8 and a right-angle fold table 10. The right-angle fold device 2 further comprises a plurality of belts conveying 12.

La lame de pli d'équerre 4 s'étend selon un plan de lame PL et elle est mobile selon ce plan de lame PL en alternance entre une position de passage des signatures et une position de pliage de signatures. Sur la Figure 1 est représentée la position de pliage de la lame 4. La lame de pli d'équerre 4 est entraînée entre ces deux postions par un dispositif d'entraînement non représenté.The right-angle fold blade 4 extends along a PL blade plane and is movable along this PL blade plane alternately between a position for passing signatures and a signature folding position. On the Figure 1 The folding position of the blade 4 is shown. The right-angle fold blade 4 is driven between these two positions by a not shown drive device.

Les rouleaux de pliage 6, 8 sont disposés mobiles en rotation autour de deux axes propres X-X. Les deux axes X-X sont parallèles, de telle sorte que les rouleaux de pliage 6,8 définissent un interstice de pliage de signatures 14 entre eux.The folding rollers 6, 8 are rotatable about two proper axes X-X. The two X-X axes are parallel, so that the folding rollers 6, 8 define a signature folding gap 14 therebetween.

Les courroies de convoyage 12 sont disposées en deux rangées, parallèlement les unes à côté des autres et les deux rangées définissent un interstice de transport 16 entre eux. Dans cet interstice 16, les courroies de convoyage 12 acheminent des signatures 17 à plier (voir Figure 2). Les signatures 17 peuvent être remplacées par d'autres produits à plier, tel que des cahiers ou des feuilles. De préférence, le papier des produits à plier a un grammage compris entre 40 m/m2 et 130 g/m2.The conveyor belts 12 are arranged in two rows, parallel to each other and the two rows define a transport gap 16 between them. In this gap 16, the conveyor belts 12 convey signatures 17 to be folded (see FIG. Figure 2 ). The signatures 17 may be replaced by other products to be folded, such as notebooks or sheets. Preferably, the paper of the products to be folded has a basis weight of between 40 m / m 2 and 130 g / m 2 .

Les signatures 17 sont acheminées par les courroies 12 selon un sens de convoyage S. Les courroies de convoyage 12 sont adaptées pour acheminer les signatures 17 jusqu'à une position de pliage.The signatures 17 are conveyed by the belts 12 in a conveying direction S. The conveyor belts 12 are adapted to convey the signatures 17 to a folding position.

La table de pli d'équerre 10 comporte une plaque de base 18 munie d'une surface d'application 20 sur laquelle s'appliquent les signatures 17 à plier. Cette surface d'application 20 définit un plan d'application PA, s'étendant perpendiculairement au plan de lame PL. La plaque de base 18 délimite une ouverture de pliage 22 s'étendant parallèlement au sens de convoyage S. La longueur de l'ouverture de pliage 22, mesurée dans le sens de convoyage S, est au moins égale à la longueur des signatures 17. La table de pliage 10 définit en outre une partie avant 24 et une partie arrière 26 selon le sens de convoyage S.The angle fold table 10 comprises a base plate 18 provided with an application surface 20 on which the signatures 17 to be folded apply. This application surface 20 defines an application plane PA, extending perpendicular to the PL blade plane. The base plate 18 defines a folding opening 22 extending parallel to the conveying direction S. The length of the folding opening 22, measured in the conveying direction S, is at least equal to the length of the signatures 17. The folding table 10 further defines a front portion 24 and a rear portion 26 in the conveying direction S.

La surface d'application 20 est divisée en deux moitiés de surface 20A, 20B qui sont séparées par un plan de séparation formé par le plan de lame PL.The application surface 20 is divided into two surface halves 20A, 20B which are separated by a separation plane formed by the PL blade plane.

La table de pli d'équerre 10 est en outre munie d'une première 28 et d'une deuxième 30 portions de guidage. Les portions de guidage 28, 30 sont disposées adjacentes à l'ouverture de pliage 22 et délimitent celle-ci. La première portion de guidage 28 comporte une première surface de guidage 32, tandis que la deuxième portion de guidage 30 comporte une deuxième surface de guidage 34. Chacune des surfaces de guidage 32, 34 est inclinée par rapport au plan d'application PA. En l'occurrence, chacune des première 32 et deuxième 34 surfaces de guidage a une section transversale courbe, notamment en arc de cercle.The angle fold table 10 is further provided with a first 28 and a second 30 guide portions. The guide portions 28, 30 are arranged adjacent to the folding opening 22 and delimit it. The first guide portion 28 has a first guide surface 32, while the second guide portion 30 has a second guide surface 34. Each of the guide surfaces 32, 34 is inclined with respect to the application plane PA. In this case, each of the first 32 and second 34 guide surfaces has a curved cross section, especially in a circular arc.

La table de pli d'équerre 10 comporte des moyens de guidage adaptés pour solliciter la signature 17 lors du pliage d'une part vers la première surface de guidage 32 et d'autre part vers la deuxième surface de guidage 34.The angle fold table 10 comprises guide means adapted to urge the signature 17 during folding on the one hand towards the first guide surface 32 and on the other hand towards the second guide surface 34.

A cet effet, la table de pli d'équerre 10 comporte une première ouverture principale d'aspiration 36 (Figure 2) débouchant sur la première surface de guidage 32 ainsi qu'une deuxième ouverture principale d'aspiration 38 (voir Figure 3) débouchant sur la deuxième surface de guidage 34. Chaque ouverture principale d'aspiration 36, 38 est un évidement oblongue s'étendant selon le sens de convoyage S et ayant une longueur L1 donnée, mesurée dans le sens de convoyage S. Comme ceci est visible sur les Figures 2 et 5, les ouvertures principales d'aspiration 36, 38 sont disposées exclusivement dans une moitié avant de la portion de guidage 28, 30 associée.For this purpose, the square fold table 10 has a first main suction opening 36 ( Figure 2 ) opening onto the first guide surface 32 and a second main suction opening 38 (see Figure 3 ) opening onto the second guide surface 34. Each main suction opening 36, 38 is an oblong recess extending in the conveying direction S and having a given length L1, measured in the conveying direction S. As this is visible on Figures 2 and 5 , the main suction openings 36, 38 are arranged exclusively in a front half of the guide portion 28, 30 associated.

La table de pli d'équerre 10 est en outre munie d'un premier 40 et d'un deuxième 42 conduit d'air principal débouchant dans l'ouverture principale d'aspiration 36, 38 associée.The angle fold table 10 is further provided with a first 40 and a second 42 main air duct opening into the associated main suction opening 36, 38.

La première portion de guidage 28 comprend une première ouverture auxiliaire d'aspiration 44 et la deuxième portion de guidage 30 comporte une deuxième ouverture auxiliaire d'aspiration 46. Chaque ouverture auxiliaire d'aspiration 44, 46 est décalée de l'ouverture principale d'aspiration associée 36, 38, et ceci vers l'amont du sens de convoyage S. En l'occurrence, chaque ouverture auxiliaire d'aspiration 44, 46 est disposée dans une moitié amont de la portion de guidage associée 28, 30.The first guide portion 28 comprises a first suction auxiliary opening 44 and the second guide portion 30 has a second suction auxiliary opening 46. Each suction auxiliary opening 44, 46 is offset from the main opening of the suction port 44. associated suction 36, 38, and this upstream of the conveying direction S. In this case, each auxiliary suction opening 44, 46 is disposed in an upstream half of the associated guide portion 28, 30.

Chaque ouverture auxiliaire d'aspiration 44, 46 a une longueur L2 mesurée selon le sens de convoyage S. Cette longueur L2 est inférieure à la longueur L1. Grâce à cette caractéristique, la signature est mieux guidée dans une zone de tête que au niveau d'une zone de queue. De plus, étant donné que la longueur de la signature peut varier d'une série de signatures à l'autre, les ouvertures d'aspiration auxiliaires 44, 46 sont toujours entièrement recouvertes par une signature indépendamment de sa longueur.Each auxiliary suction opening 44, 46 has a length L2 measured in the conveying direction S. This length L2 is less than the length L1. With this feature, the signature is better guided in a head zone than at a tail area. In addition, since the length of the signature may vary from one series of signatures to another, the auxiliary suction openings 44, 46 are always completely covered by a signature regardless of its length.

Aussi, les rouleaux de pliage 6, 8 peuvent comporter des rainures de libération locale de la signature. Dans ce cas, les ouvertures principales 36, 38 et auxiliaires 44, 46 sont alignées dans le sens S avec les rainures de libération locale.Also, the folding rollers 6, 8 may include local release grooves of the signature. In this case, the main openings 36, 38 and auxiliary 44, 46 are aligned in the direction S with the local release grooves.

La table de pli d'équerre 10 comporte en outre deux conduits d'air auxiliaire 48, chacun de ces conduits débouchant dans l'ouverture auxiliaire d'aspiration 44, 46 associée, comme ceci est visible sur la Figure 3. Les emplacements des embouchures des conduits d'air principal 40, 42 et auxiliaire 48 sont disposés à des extrémités des ouvertures principale d'aspiration 36, 38 et auxiliaire d'aspiration 44, 46 dirigées l'une vers l'autre. Ceci permet d'aspirer les signatures 17 sur une longueur axiale importante tout en gardant une faible longueur des conduitsThe angle fold table 10 further comprises two auxiliary air ducts 48, each of these ducts opening into the associated auxiliary suction opening 44, 46, as can be seen in FIG. Figure 3 . The locations of the mouths of the main air ducts 40, 42 and auxiliary 48 are disposed at the ends of the main suction openings 36, 38 and suction auxiliary 44, 46 directed toward each other. This makes it possible to suck the signatures 17 over a long axial length while keeping a small length of the conduits

Les ouvertures principales d'aspiration 36, 38 et les ouvertures auxiliaires d'aspiration 44, 46 sont disposées à des emplacements de portion de guidage associée 28, 30 ayant une inclinaison de moins de 45° par rapport à la surface d'application 20.The main suction openings 36, 38 and the auxiliary suction openings 44, 46 are disposed at associated guide portion locations 28, 30 having an inclination of less than 45 ° with respect to the application surface 20.

La table de pli d'équerre 10 comporte en outre des ouvertures d'aspiration et d'application 50 débouchant sur la surface d'application 20. Les ouvertures d'aspiration et d'application 50 sont regroupées en plusieurs groupes d'ouverture G1, G2, G3, G4, illustrés sur la Figure 5. Chacun des groupes d'ouverture G1, G2, G3, G4 s'étend sur une zone de la surface d'application 20. Les zones définies par les groupes G1 à G4 sont disposées sur la même moitié 20A ou 20B de la surface d'application 20. Chaque ouverture d'aspiration et d'application 50 d'un groupe d'ouvertures G1 à G4 considéré débouche dans une même chambre à vide 52 (voir Figure 4) délimitée par une boite à vide 54. Ainsi, la boîte à vide 54 comporte quatre chambres à vide 52. Comme indiqué sur la Figure 5, chaque moitié 20A et 20B de la surface est munie d'un groupe G1 à G4 d'ouvertures 50.The angle fold table 10 further comprises suction and application openings 50 opening onto the application surface 20. The suction and application openings 50 are grouped into several opening groups G1, G2, G3, G4, illustrated on the Figure 5 . Each of the opening groups G1, G2, G3, G4 extends over an area of the application surface 20. The zones defined by the groups G1 to G4 are arranged on the same half 20A or 20B of the surface of 20. Each suction and application opening 50 of a group of openings G1 to G4 considered opens into the same vacuum chamber 52 (see FIG. Figure 4 ) delimited by a vacuum box 54. Thus, the vacuum box 54 comprises four vacuum chambers 52. As indicated on the Figure 5 each half 20A and 20B of the surface is provided with a group G1 to G4 of openings 50.

La boîte à vide 54 délimite également une chambre à vide 53 dans laquelle débouchent les conduits d'aspiration principal 40, 42 et auxiliaire 48.The vacuum box 54 also defines a vacuum chamber 53 into which the main suction lines 40, 42 and auxiliary 48 open.

Chaque chambre à vide 52 est munie d'un raccord d'aspiration 56 individuel séparé du raccord d'aspiration 56 des autres chambres à vide 52. Comme ceci est visible sur la Figure 5, les groupes G1 et G2 sont décalés des de groupes G3 et G4 dans le sens de la longueur de la table, à savoir dans le sens de convoyage S. Les groupes G2 et G4 sont décalés des groupes G1 et G3 dans le sens de la largeur de la table, à savoir perpendiculairement au sens de convoyage S.Each vacuum chamber 52 is provided with an individual suction connector 56 separate from the suction connector 56 of the other vacuum chambers 52. As can be seen in FIG. Figure 5 the groups G1 and G2 are offset from groups G3 and G4 in the direction of the length of the table, namely in the direction of conveying S. The groups G2 and G4 are shifted from the groups G1 and G3 in the direction of the width of the table, ie perpendicular to the conveying direction S.

La table de pli d'équerre 10 est en outre munie d'un dispositif à vide (voir Figure 1), comprenant une pompe à vide 60 reliée à une conduite collectrice 62. La conduite collectrice 62 est reliée par des raccords de piquage 64 à chacun des raccords individuels 56 et à chacun des conduits d'air 40, 42.The angle fold table 10 is further provided with a vacuum device (see Figure 1 ), comprising a vacuum pump 60 connected to a collecting pipe 62. The collecting pipe 62 is connected by stitching connections 64 to each of the individual connections 56 and to each of the air ducts 40, 42.

Le dispositif selon l'invention fonctionne de la manière suivante.The device according to the invention operates in the following manner.

Les signatures à plier 17 sont acheminées selon le sens de convoyage S par les courroies de convoyage 12. Dès que la signature 17 recouvre les ouvertures 50, elle est sollicitée contre la surface d'application 20 de la plaque de base 18. Ensuite, la lame de pli d'équerre 4 est amenée dans sa position de pliage et pousse la partie centrale de la signature 17 à travers l'ouverture de pliage 22. La partie centrale de la signature 17 est saisie par les rouleaux de pliage 6, 8 et est entraînée vers le bas. Lors de cette opération, la partie centrale de la signature 17 est maintenue contre les surfaces de guidage 32, 34. La signature 17 est maintenue plaquée contre les portions de guidage 28, 30 jusqu'à ce que des bords latéraux de la signature 17 franchissent les ouvertures principales 36, 38 et auxiliaires 44,46.The signatures to be folded 17 are conveyed according to the conveying direction S by the conveying belts 12. As soon as the signature 17 covers the openings 50, it is urged against the application surface 20 of the base plate 18. Next, the angle fold blade 4 is brought into its folding position and pushes the central part of the signature 17 through the folding opening 22. The central part of the signature 17 is grasped by the folding rollers 6, 8 and is driven down. During this operation, the central part of the signature 17 is held against the guide surfaces 32, 34. The signature 17 is kept pressed against the guide portions 28, 30 until lateral edges of the signature 17 cross. the main openings 36, 38 and auxiliary 44,46.

Les bords latéraux de la signature 17 ne sont donc pas libérés d'une manière abrupte et n'exercent donc pas de « coup de fouet » juste avant leur passage entre les rouleaux 6, 8.The lateral edges of the signature 17 are not released abruptly and therefore do not exert "whiplash" just before their passage between the rollers 6, 8.

On comprend que, grâce aux ouvertures d'aspiration 36, 38, 44, 46, la cadence de pliage peut être élevée sans génération de dégradations au niveau des signatures 17, même si ces signatures 17 comprennent du papier à faible grammage.It is understood that, thanks to the suction openings 36, 38, 44, 46, the folding rate can be high without generating damage to the signatures 17, even if these signatures 17 comprise paper with a low basis weight.

Claims (15)

Table pour dispositif de pli d'équerre, du type comprenant - une surface d'application (20) de produits à plier (17), la surface d'application (20) s'étendant selon un plan d'application (PA), - une ouverture de pliage (22) adaptée pour être traversée par les produits à plier (17), - au moins une première portion de guidage (28) disposée adjacente à l'ouverture de pliage (22) et comprenant une première surface de guidage (32) inclinée par rapport au plan d'application, caractérisée en ce que la table (10) comprend des moyens de guidage adaptés pour solliciter le produit à plier vers la première surface de guidage (32) qui sont munis d'une première ouverture principale d'aspiration (36) débouchant sur la première surface de guidage (32).Table for an angle fold device, of the type comprising an application surface (20) for products to be folded (17), the application surface (20) extending along an application plane (PA), - a folding opening (22) adapted to be traversed by the products to be folded (17), at least one first guide portion (28) disposed adjacent to the folding opening (22) and comprising a first guide surface (32) inclined with respect to the application plane, characterized in that the table (10) comprises guide means adapted to bias the product to be folded towards the first guide surface (32) which are provided with a first main suction opening (36) opening onto the first surface guide (32). Table selon la revendication 1, caractérisée en ce que la table comprend une deuxième portion de guidage (30) disposée adjacente à l'ouverture de pliage (22) et en vis-à-vis de la première portion de guidage (28), cette deuxième portion de guidage (30) comprenant une deuxième surface de guidage (34) inclinée par rapport au plan d'application (PA), et en ce que la table comprend une deuxième ouverture principale d'aspiration (38) débouchant sur la deuxième surface de guidage (34).Table according to Claim 1, characterized in that the table comprises a second guiding portion (30) disposed adjacent to the folding opening (22) and facing the first guiding portion (28). second guide portion (30) comprising a second guide surface (34) inclined with respect to the application plane (PA), and in that the table comprises a second main suction opening (38) opening on the second surface guide (34). Table selon la revendication 1 ou 2, caractérisée en ce qu'elle définit une partie avant (24) et une partie arrière (26) selon un sens de déplacement (S) d'un produit à plier (17) sur la table, et en ce que la ou chaque ouverture principale d'aspiration (36, 38) est disposée dans une moitié avant de la portion de guidage (28, 30) associée.Table according to claim 1 or 2, characterized in that it defines a front portion (24) and a rear portion (26) in a direction of movement (S) of a product to be folded (17) on the table, and in that the or each main suction opening (36, 38) is disposed in a front half of the associated guide portion (28, 30). Table selon l'une quelconque des revendications 1 à 3, caractérisée en ce que la ou chaque portion de guidage (28, 30) comprend une ouverture auxiliaire d'aspiration (44, 46), et en ce que cette ouverture auxiliaire d'aspiration (44, 46) est décalée de l'ouverture d'aspiration principale.Table according to any one of claims 1 to 3, characterized in that the or each guide portion (28, 30) comprises an auxiliary suction opening (44, 46), and in that this auxiliary suction opening (44, 46) is offset from the main suction opening. Table selon la revendication 4, caractérisée en ce que la ou chaque ouverture auxiliaire d'aspiration (44, 46) a une longueur (L2) inférieure à une longueur (L1) de l'ouverture principale d'aspiration (36, 38) associée.Table according to claim 4, characterized in that the or each auxiliary suction opening (44, 46) has a length (L2) less than a length (L1) of the associated main suction opening (36, 38). . Table selon la revendication 3 et l'une des revendications 4 ou 5 prises ensemble, caractérisée en ce qu'elle comprend, pour chaque ouverture principale d'aspiration (36, 38), un conduit d'air principal (40, 42), débouchant dans l'ouverture principale d'aspiration (36, 38) associée, et un conduit d'air auxiliaire (48), débouchant dans l'ouverture auxiliaire d'aspiration (44, 46) associée, et en ce que les emplacements des embouchures des conduits d'air principal (40, 42) et auxiliaire (48) sont disposés à des extrémités des ouvertures principal (36, 38) et auxiliaire (44, 46) d'aspiration dirigées l'une vers l'autre.Table according to Claim 3 and one of Claims 4 or 5 taken together, characterized in that it comprises, for each main suction opening (36, 38), a main air duct (40, 42), opening into the associated main suction opening (36, 38), and an auxiliary air duct (48) opening into the associated auxiliary suction opening (44, 46), and that the locations of the The mouths of the main (40, 42) and auxiliary (48) air ducts are disposed at the ends of the main (36, 38) and auxiliary (44, 46) suction openings directed towards each other. Table selon l'une quelconque des revendications 1 à 6, caractérisée en ce que la ou chaque ouverture principale (36, 38) ou, le cas échéant auxiliaire (44, 46), d'aspiration est située à un emplacement de la surface de guidage (32, 34) associée ayant une inclinaison de moins de 45° par rapport à la surface d'application (20).Table according to any one of claims 1 to 6, characterized in that the or each main opening (36, 38) or, where appropriate auxiliary (44, 46), suction is located at a location of the surface of guide (32, 34) having an inclination of less than 45 ° with respect to the application surface (20). Table selon l'une quelconque des revendications précédentes, caractérisée en ce que la ou chaque surface de guidage (32, 34) a une section transversale courbe, notamment en arc de cercle.Table according to any one of the preceding claims, characterized in that the or each guide surface (32, 34) has a curved cross section, in particular in a circular arc. Table selon l'une quelconque des revendications précédentes, caractérisée en ce que la surface d'application (20) comporte deux moitiés (20A, 20B) séparées par un plan de séparation (PL), et en ce que la table comporte un premier groupe (G1, G3) d'ouvertures d'aspiration et d'application (50) s'étendant sur une première zone de la surface d'application (20) et un deuxième groupe d'ouvertures (G2, G4) d'aspiration et d'application s'étendant sur une deuxième zone de la surface d'application, en ce que la deuxième zone est disposée sur la même moitié de la surface d'application que la première zone, et en ce que chaque groupe d'ouvertures d'application est muni d'un raccord d'aspiration (56) individuel.Table according to any one of the preceding claims, characterized in that the application surface (20) comprises two halves (20A, 20B) separated by a separation plane (PL), and in that the table comprises a first group (G1, G3) suction and application openings (50) extending over a first area of the application surface (20) and a second group of suction openings (G2, G4) and applying to a second zone of the application surface, in that the second zone is arranged on the same half of the application surface as the first zone, and in that each group of openings The application is provided with an individual suction connection (56). Table selon la revendication 9, caractérisée en ce que chaque groupe d'ouvertures d'application (G1, G2, G3, G4) comporte une chambre à vide (52) dans laquelle débouchent les ouvertures d'application (50) du groupe d'ouvertures associé et dans laquelle débouche le raccord d'aspiration (56) associé.Table according to claim 9, characterized in that each group of application openings (G1, G2, G3, G4) comprises a vacuum chamber (52) in which the application openings (50) of the group of associated openings and in which opens the suction connection (56) associated. Table selon la revendication 9 ou 10, caractérisée en ce que la première (G1, G3) et la deuxième (G2, G4) zones sont décalées l'une de l'autre dans le sens de la longueur.Table according to claim 9 or 10, characterized in that the first (G1, G3) and the second (G2, G4) areas are offset from each other in the longitudinal direction. Table selon la revendication 9 ou 10, caractérisée en ce que la première (G1, G3) et la deuxième zones (G2, G4) sont décalées l'une de l'autre dans le sens de la largeur.Table according to claim 9 or 10, characterized in that the first (G1, G3) and the second areas (G2, G4) are offset from each other in the width direction. Table selon l'une quelconque des revendications précédentes, caractérisée en ce que la table comporte un dispositif à vide (60, 62, 56, 40) raccordé à l'une ou à chacune des ouvertures principale (36, 38) et/ou auxiliaire (44, 46) d'aspiration.Table according to any one of the preceding claims, characterized in that the table comprises a vacuum device (60, 62, 56, 40) connected to one or to each of the main (36, 38) and / or auxiliary openings (44, 46) suction. Table selon l'une quelconque des revendications 9 à 12 et la revendication 13 prises ensemble, caractérisée en ce qu'un dispositif à vide d'application est raccordé aux ouvertures de chacun des groupes d'ouvertures.Table according to any one of claims 9 to 12 and claim 13 taken together, characterized in that an application vacuum device is connected to the openings of each of the groups of openings. Dispositif de pli d'équerre, du type comprenant - une lame de pli d'équerre (4), - deux rouleaux plieurs (6, 8), et - une table de pli d'équerre (12), caractérisé en ce que la table de pli d'équerre est une table selon l'une quelconque des revendications précédentes.Angle fold device, of the type comprising - a square folding blade (4), two folding rollers (6, 8), and - a square fold table (12), characterized in that the square fold table is a table according to any one of the preceding claims.
EP08104364.8A 2007-06-12 2008-06-11 Table for a folder and related folding device. Not-in-force EP2003079B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0755684A FR2917395B1 (en) 2007-06-12 2007-06-12 TABLE FOR SQUARE PEN DEVICE AND CORRESPONDING PED PLIER DEVICE.

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EP2003079A1 true EP2003079A1 (en) 2008-12-17
EP2003079B1 EP2003079B1 (en) 2016-01-13

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EP (1) EP2003079B1 (en)
JP (1) JP2008308339A (en)
CN (1) CN101323404B (en)
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JP5534532B2 (en) * 2009-12-10 2014-07-02 ホリゾン・インターナショナル株式会社 Knife folding device
FR2955094B1 (en) * 2010-01-08 2012-05-11 Goss Int Montataire Sa METHOD FOR CONTROLLING AN EQUIPMENT PLIERS DEVICE AND EQUER PLY DEVICE
EP2527279B1 (en) * 2010-01-18 2016-05-11 Horizon International Inc. Knife folding device
CN102502328B (en) * 2011-11-07 2015-05-13 全利机械股份有限公司 Device for folding fiber products

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FR2546818A1 (en) 1983-06-06 1984-12-07 Marinoni Harris Sa DEVICE FOR SLOWING COPIES IN A FOLDING BRAKE PAD USED IN RELATION TO ROTARY PRESSES
US4863152A (en) * 1988-04-29 1989-09-05 Qfc, Inc. High speed quarter-folder
DE4314239A1 (en) * 1992-05-29 1994-11-03 Heidelberger Druckmasch Ag Apparatus for supporting the controlled copy transport in the folding apparatus of rotary printing machines
DE10251189A1 (en) * 2001-11-16 2003-06-05 Heidelberger Druckmasch Ag Folding apparatus with integrated vacuum and pressure creation has first and second line systems connected to each other at one or more intersection points

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US3632104A (en) * 1969-08-27 1972-01-04 Harris Intertype Corp Balanced folder assembly
US3926425A (en) * 1974-06-27 1975-12-16 Kimberly Clark Co Method of coupon positioning and mechanism therefor
US4419088A (en) * 1981-06-19 1983-12-06 Nemec David G Gate folding apparatus

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FR2546818A1 (en) 1983-06-06 1984-12-07 Marinoni Harris Sa DEVICE FOR SLOWING COPIES IN A FOLDING BRAKE PAD USED IN RELATION TO ROTARY PRESSES
US4863152A (en) * 1988-04-29 1989-09-05 Qfc, Inc. High speed quarter-folder
DE4314239A1 (en) * 1992-05-29 1994-11-03 Heidelberger Druckmasch Ag Apparatus for supporting the controlled copy transport in the folding apparatus of rotary printing machines
DE10251189A1 (en) * 2001-11-16 2003-06-05 Heidelberger Druckmasch Ag Folding apparatus with integrated vacuum and pressure creation has first and second line systems connected to each other at one or more intersection points

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US7931576B2 (en) 2011-04-26
JP2008308339A (en) 2008-12-25
US20080307940A1 (en) 2008-12-18
FR2917395B1 (en) 2009-09-18
EP2003079B1 (en) 2016-01-13
CN101323404B (en) 2012-11-28
FR2917395A1 (en) 2008-12-19
CN101323404A (en) 2008-12-17

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