EP2008957A1 - Device for braking flat products and corresponding folding machine - Google Patents

Device for braking flat products and corresponding folding machine Download PDF

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Publication number
EP2008957A1
EP2008957A1 EP08158853A EP08158853A EP2008957A1 EP 2008957 A1 EP2008957 A1 EP 2008957A1 EP 08158853 A EP08158853 A EP 08158853A EP 08158853 A EP08158853 A EP 08158853A EP 2008957 A1 EP2008957 A1 EP 2008957A1
Authority
EP
European Patent Office
Prior art keywords
braking
jaw
braking device
eccentric element
eccentric
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
EP08158853A
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German (de)
French (fr)
Other versions
EP2008957B1 (en
Inventor
Franck Chagnon
Philippe Herda
Thierry Melon
Jérôme PERES
Eric Pierda
Jean-François Robert
Philippe Robin
Thierry Vauchelle
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.)
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Publication date
Application filed by Goss International Montataire SA filed Critical Goss International Montataire SA
Publication of EP2008957A1 publication Critical patent/EP2008957A1/en
Application granted granted Critical
Publication of EP2008957B1 publication Critical patent/EP2008957B1/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
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/14—Retarding or controlling the forward movement of articles as they approach stops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/68—Reducing the speed of articles as they advance
    • 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

Definitions

  • Document is known FR-A-2 793 229 such a braking device of a flat product.
  • This device uses an electromagnet to move the brake lining from its passage position to its braking position.
  • the invention aims to increase the reliability of the braking device, especially at high production rates.
  • the subject of the invention is a braking device of the type indicated, characterized in that the drive means comprise an eccentric element which is movable in rotation and co-operates with the braking jaw.
  • the subject of the invention is also a folding machine, in particular a folding bending machine comprising a folding table and a braking device for bending flat products arriving on the folding table, characterized in that the braking device is equipped with a braking device as defined above.
  • the folder is characterized in that the braking device comprises means for controlling the eccentric element adapted to exclusively brake the downstream part of a flat product to be folded.
  • the folder 2 comprises a right-angle fold device 4, flat product conveying means 6 and a braking device 8 of a flat product.
  • the folder 2 comprises a frame 10 on which are mounted these different components.
  • the right-angle fold device 4 is provided with a right-angle fold blade 12 (see FIG. Figure 3 ) and two parallel folding rolls 14, 16.
  • the square folding device 4 is further provided with a folding table 18, provided with a folding slot 20.
  • the right-angle fold device 4 is adapted to fold a flat product by pushing this product. flattening through the bending slot 20 by the bending blade 12 and grasping it by the folding rolls 14, 16.
  • the conveying means 6 comprise parallel belts 21 adapted to bring a succession of flat products to be folded, such as printed signatures 23 or sheets printed on the folding table 18.
  • the braking device 8 is adapted to slow down or completely stop the products to be folded before folding.
  • the braking device 8 comprises a support 22 which is movable in translation in a direction perpendicular to the plane of the folding table 18.
  • the support 22 is displaceable, for example, in a direction perpendicular to the plane of the folding table 18 by means of a jack 24 fixed to the frame 10 (see Figure 3 ).
  • the braking device 8 further comprises a plurality of braking jaws 26 each of which is movable between a position of passage of the flat product to be folded and a braking position of the flat product.
  • a braking jaw 26 When the braking jaw 26 is in its position of passage of the flat product, it is further away from the surface of the folding table 18 than when it is in its braking position of the flat product.
  • the braking jaw 26 comprises a braking face 28 directed towards the product to be folded 23 or the folding table 18 and an actuating face 30 disposed opposite the braking face 28.
  • Each braking jaw 26 consists of a base body 32, a brake lining 34 and a wear member 36.
  • the base body 32 is for example a metal block, in particular aluminum.
  • the brake lining 34 forms the braking surface 28 and may comprise either a plastic brake pad 34A or a brush 34B.
  • the brushes 34B may have different widths (see Figure 3 ), measured transversely to the conveying direction of the flat products.
  • the wear member 36 is a block which is, for example, made of bronze, and which has a concave friction surface. This friction surface forms the actuating face 30 directed away from the braking face 28.
  • the braking device 8 is provided with means for returning the braking jaw 26 towards its passage position.
  • These return means comprise a leaf spring 38, a first end is fixed to the support 22 and a second end is fixed to the braking jaw 26 and carries it.
  • the natural frequency of the blade 38 is different from the natural frequency of the rest of the folder. This prevents brake linings from being excited by the brake during operation.
  • the braking device 8 further comprises means for driving the jaw 26 from its passage position to its braking position.
  • These drive means comprise an eccentric element 40 rotatable about an axis of rotation X-X.
  • the eccentric member 40 has an outer surface 41 having a circle-shaped cross section whose axis is offset from the axis of rotation X-X.
  • the eccentric member 40 may be replaced by a cam having an outer surface 41 of non-circular section.
  • the eccentric element 40 is rotatable about the axis XX between a passage position corresponding to the passage position of the brake jaw 26 (see FIG. Figure 2 ) and a braking position corresponding to the braking position of the brake jaw 26.
  • the eccentric element 40 is fixed in rotation on a shaft 42 itself rotatable about the axis XX.
  • the eccentric element 40 applies with its outer surface 41 freely on the friction surface of the wear member 36 so that when the eccentric member 40 is in its passage position, the brake shoe 26 is freely movable from its position of passage to its braking position by removing the wear member 36 from the eccentric member 40 and against the return force of the spring 38.
  • the eccentric member 40 is made of a harder material than the wear member 36, for example of steel.
  • the leaf spring 38 maintains the braking jaw 26 in its position of passage to the idle state, and recalls the braking jaw 26 towards its passage position when the latter is in its braking position.
  • the braking device 8 comprises means for driving in rotation the shaft 42.
  • these drive means comprise an electric motor 44 for each shaft 42, motor 44 whose output shaft is connected by by means of a double cardan joint connection 46 to the shaft 42.
  • the double universal joint connection allows the height adjustment of the assembly consisting of leaf springs 38, blade support 22, and shafts 42, knowing that the motors 44 are fixed to the frame 10. In addition, it allows to move the brake linings between a support position and an off-position on the folding table 18.
  • a shaft 42 comprises at least two eccentric elements 40, each of which cooperates with a wear member 36, thus with a brake lining.
  • two or more brake linings are controllable by a single shaft 42.
  • the shaft 42 is rotatably accommodated to the support 22 but also fixed relative thereto while each motor 44 is fixed to the frame 10.
  • the folder 2 further comprises control means 50 for controlling each motor 44 and consequently the eccentric element 40 in a manner synchronized with the arrival of the flat products to be folded on the folding table 18.
  • control means 50 comprise a sensor 52 raising the position and / or the speed of the products to be folded 23 and delivering a signal corresponding to a control unit 54.
  • the control unit 54 is connected to each motor 44
  • the control means 50 are adapted to bring the eccentric member 40 in rotation so that the braking jaws 26 apply exclusively to a downstream part of a flat product to be bent 23.
  • the upstream part of the product plate 23 is not braked by contact with the brake lining 26.
  • the folder according to the invention is advantageous since the eccentric members 40 can be rotated at a high speed. As a result, the folder can be driven at high bend rates, for example, 70,000 copies per hour.
  • the motors 44 are synchronized with a drive motor of the folder 2.
  • the two motors 44 can be controlled so that the phase of rotation of the eccentric elements 40 associated with a motor 44 is shifted from the phase of rotation of the eccentric elements 40 associated with another motor 44.
  • two motors 44 can independently drive brake linings arranged on either side of the folding blade 12 in each case. In this case it is possible to shift the action of the brake linings located on both sides of the blade 12, to straighten the cross of the notebook. In other words, the variation of the motors 44 of the brake jaws 26 located on either side of the blade 12 makes it possible to correct the cross-section of a booklet that is not perpendicular to the blade 12.
  • the phasing of the motors 44 with respect to the signatures 23 is modifiable.
  • the cardan joint 46 and the motors 44 have been replaced by a single driven shaft 42 by a single motor 44 , a second shaft 42A being driven through a toothed belt connection 50.
  • the two shafts are fixed by translation with respect to each other.
  • the advantage of this variant is its low cost.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Abstract

The device (8) has a support (22). Braking jaws move between a passage position and a braking position of a flat product (23). A driving unit drives the jaws from the passage position to the braking position, and has an eccentric element that rotates around a rotational axis (X-X) and co-operates with the jaw. The jaw has a base body and a wear part that is made of bronze. The eccentric element is rotatably fixed on a shaft (42) that is rotates around the rotational axis.

Description

La présente invention concerne un dispositif de freinage d'un produit plat, notamment d'une signature, du type comportant

  • un support,
  • une mâchoire de freinage du produit plat, mobile entre une position de passage du produit plat et une position de freinage du produit plat,
  • des moyens d'entraînement de la mâchoire de freinage de sa position de passage vers sa position de freinage.
The present invention relates to a device for braking a flat product, in particular a signature, of the type comprising
  • a support,
  • a brake jaw of the flat product, movable between a flat product passage position and a braking position of the flat product,
  • means for driving the braking jaw from its passage position to its braking position.

Elle s'applique notamment aux plieuses de presses rotatives offset.It applies in particular to the presses of offset rotary presses.

On connaît du document FR-A-2 793 229 un tel dispositif de freinage d'un produit plat.Document is known FR-A-2 793 229 such a braking device of a flat product.

Ce dispositif utilise un électro-aimant afin de déplacer la garniture de freinage de sa position de passage vers sa position de freinage.This device uses an electromagnet to move the brake lining from its passage position to its braking position.

Toutefois, les électro-aimants sont peu fiables.However, electromagnets are unreliable.

En conséquence, l'invention a pour but d'augmenter la fiabilité du dispositif de freinage, notamment lors des cadences de production élevées.Accordingly, the invention aims to increase the reliability of the braking device, especially at high production rates.

A cet effet, l'invention a pour objet un dispositif de freinage du type indiqué, caractérisé en ce que les moyens d'entraînement comprennent un élément excentrique mobile en rotation et coopérant avec la mâchoire de freinage.For this purpose, the subject of the invention is a braking device of the type indicated, characterized in that the drive means comprise an eccentric element which is movable in rotation and co-operates with the braking jaw.

Selon des modes de réalisation particuliers de l'invention, le dispositif de freinage comporte l'une ou plusieurs des caractéristiques suivantes :

  • l'élément excentrique est mobile en rotation notamment entre une position de passage correspondant à la position de passage de la mâchoire de freinage et une position de freinage correspondant à la position de freinage de la mâchoire de freinage, et la mâchoire de freinage est librement mobile entre ses positions de passage et de freinage lorsque l'élément excentrique est dans sa position de passage ;
  • la mâchoire de freinage comporte une face de freinage dirigée vers le produit plat à freiner à l'état installé et une face d'actionnement disposée à l'opposé de la face de freinage, et l'élément excentrique coopère avec la face d'actionnement ;
  • la mâchoire de freinage comporte un corps de base et un organe d'usure, et l'organe d'usure est en contact avec l'élément excentrique ;
  • l'organe d'usure est en une matière moins dure que l'élément excentrique, et est notamment en bronze ;
  • le dispositif de freinage comprend des moyens de rappel de la mâchoire de freinage vers sa position de passage, notamment un ressort ;
  • les moyens de rappel comprennent un ressort à lame fixé à la mâchoire de freinage et au support ; et
  • le dispositif de freinage comprend des moyens d'entraînement en rotation de l'élément excentrique, notamment un moteur et une liaison à joints cardan.
According to particular embodiments of the invention, the braking device comprises one or more of the following features:
  • the eccentric element is rotatable in particular between a passage position corresponding to the position of passage of the braking jaw and a braking position corresponding to the braking position of the braking jaw, and the braking jaw is freely movable between its passage and braking positions when the eccentric element is in its passage position;
  • the braking jaw comprises a braking face directed towards the flat product to be braked in the installed state and an actuating face disposed opposite the braking face, and the eccentric element cooperates with the actuating face. ;
  • the braking jaw has a base body and a wear member, and the wear member is in contact with the eccentric member;
  • the wear member is made of a material which is less hard than the eccentric element, and is in particular of bronze;
  • the braking device comprises means for returning the braking jaw to its passage position, in particular a spring;
  • the return means comprise a leaf spring fixed to the braking jaw and to the support; and
  • the braking device comprises means for rotating the eccentric element, in particular a motor and a universal joint.

L'invention a également pour objet une plieuse, notamment une plieuse de pli d'équerre comprenant une table de pliage et d'un dispositif de freinage de produits plats à plier arrivant sur la table de pliage, caractérisée en ce que le dispositif de freinage est muni d'un dispositif de freinage tel que défini ci-dessus.The subject of the invention is also a folding machine, in particular a folding bending machine comprising a folding table and a braking device for bending flat products arriving on the folding table, characterized in that the braking device is equipped with a braking device as defined above.

Selon un mode de réalisation particulier, la plieuse est caractérisée en ce que le dispositif de freinage comprend des moyens de commande de l'élément excentrique adaptés pour freiner exclusivement la partie aval d'un produit plat à plier.According to a particular embodiment, the folder is characterized in that the braking device comprises means for controlling the eccentric element adapted to exclusively brake the downstream part of a flat product to be folded.

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 en perspective d'une partie d'une plieuse munie d'un dispositif de freinage selon l'invention;
  • la Figure 2 est une vue de détail de la plieuse de la Figure 1, une partie du support étant omise ;
  • la Figure 3 est une vue frontale de la plieuse des Figures 1 et 2 ; et
  • la Figure 4 est une vue en perspective d'une variante de la plieuse selon l'invention, la vue correspondant à celle de la Figure 1.
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:
  • the Figure 1 is a perspective view of a portion of a folder provided with a braking device according to the invention;
  • the Figure 2 is a detail view of the folder of the Figure 1 part of the support being omitted;
  • the Figure 3 is a front view of the folder Figures 1 and 2 ; and
  • the Figure 4 is a perspective view of a variant of the folder according to the invention, the view corresponding to that of the Figure 1 .

Sur la Figure 1 est représentée en perspective une partie d'une plieuse selon l'invention, désignée par la référence générale 2.On the Figure 1 is represented in perspective a part of a folder according to the invention, designated by the general reference 2.

La plieuse 2 comporte un dispositif de pli d'équerre 4, des moyens d'acheminement 6 de produits plats, ainsi qu'un dispositif de freinage 8 d'un produit plat. La plieuse 2 comporte un bâti 10 sur lequel sont montées ces différentes composantes.The folder 2 comprises a right-angle fold device 4, flat product conveying means 6 and a braking device 8 of a flat product. The folder 2 comprises a frame 10 on which are mounted these different components.

Le dispositif de pli d'équerre 4 est muni d'une lame de pli d'équerre 12 (voir Figure 3) ainsi que de deux rouleaux de pliage 14, 16 parallèles. Le dispositif de pli d'équerre 4 est en outre muni d'une table de pliage 18, munie d'une fente de pliage 20. Ainsi, le dispositif de pli d'équerre 4 est adapté pour plier un produit plat en poussant ce produit plat à travers la fente de pliage 20 par la lame de pli d'équerre 12 et en le saisissant par les rouleaux de pliage 14, 16.The right-angle fold device 4 is provided with a right-angle fold blade 12 (see FIG. Figure 3 ) and two parallel folding rolls 14, 16. The square folding device 4 is further provided with a folding table 18, provided with a folding slot 20. Thus, the right-angle fold device 4 is adapted to fold a flat product by pushing this product. flattening through the bending slot 20 by the bending blade 12 and grasping it by the folding rolls 14, 16.

Les moyens d'acheminement 6 comportent des courroies 21 parallèles adaptées pour amener une succession de produits plats à plier, tels que des signatures imprimées 23 ou des feuilles imprimées sur la table de pliage 18.The conveying means 6 comprise parallel belts 21 adapted to bring a succession of flat products to be folded, such as printed signatures 23 or sheets printed on the folding table 18.

Le dispositif de freinage 8 est adapté pour ralentir, voir arrêter complètement les produits à plier avant le pliage. Le dispositif de freinage 8 comporte un support 22 qui est mobile en translation selon une direction perpendiculaire au plan de la table de pliage 18. Le support 22 est déplaçable, par exemple, selon une direction perpendiculaire au plan de la table de pliage 18 au moyen d'un vérin 24 fixé au bâti 10 (voir Figure 3).The braking device 8 is adapted to slow down or completely stop the products to be folded before folding. The braking device 8 comprises a support 22 which is movable in translation in a direction perpendicular to the plane of the folding table 18. The support 22 is displaceable, for example, in a direction perpendicular to the plane of the folding table 18 by means of a jack 24 fixed to the frame 10 (see Figure 3 ).

Le dispositif de freinage 8 comporte en outre plusieurs mâchoires de freinage 26 dont chacune est mobile entre une position de passage du produit plat à plier et une position de freinage du produit plat. Lorsque la mâchoire de freinage 26 se trouve dans sa position de passage du produit plat, elle est plus écartée de la surface de la table de pliage 18 que lorsqu'elle se trouve dans sa position de freinage du produit plat.The braking device 8 further comprises a plurality of braking jaws 26 each of which is movable between a position of passage of the flat product to be folded and a braking position of the flat product. When the braking jaw 26 is in its position of passage of the flat product, it is further away from the surface of the folding table 18 than when it is in its braking position of the flat product.

En l'occurrence, la mâchoire de freinage 26 comporte une face de freinage 28 dirigée vers le produit à plier 23 ou la table de pliage 18 et une face d'actionnement 30 disposée à l'opposé de la face de freinage 28.In this case, the braking jaw 26 comprises a braking face 28 directed towards the product to be folded 23 or the folding table 18 and an actuating face 30 disposed opposite the braking face 28.

Chaque mâchoire de freinage 26 est constituée d'un corps de base 32, d'une garniture de freinage 34 et d'un organe d'usure 36.Each braking jaw 26 consists of a base body 32, a brake lining 34 and a wear member 36.

Le corps de base 32 est par exemple un bloc en métal, notamment en aluminium.The base body 32 is for example a metal block, in particular aluminum.

La garniture de freinage 34 forme la face de freinage 28 et peut comprendre soit un patin de freinage en matière plastique 34A, soit une brosse 34B. Les brosses 34B peuvent avoir des largeurs différentes (voir Figure 3), mesuré transversalement à la direction d'acheminement des produits plats.The brake lining 34 forms the braking surface 28 and may comprise either a plastic brake pad 34A or a brush 34B. The brushes 34B may have different widths (see Figure 3 ), measured transversely to the conveying direction of the flat products.

L'organe d'usure 36 est un bloc qui est, par exemple, fabriqué en bronze, et qui comporte une surface de frottement concave. Cette surface de frottement forme la face d'actionnement 30 dirigée à l'opposé de la face de freinage 28.The wear member 36 is a block which is, for example, made of bronze, and which has a concave friction surface. This friction surface forms the actuating face 30 directed away from the braking face 28.

Par ailleurs, le dispositif de freinage 8 est muni de moyens de rappel de la mâchoire de freinage 26 vers sa position de passage. Ces moyens de rappel comprennent un ressort à lame 38 dont une première extrémité est fixée au support 22 et dont une deuxième extrémité est fixée à la mâchoire de freinage 26 et porte celle-ci. De manière avantageuse, la fréquence propre de la lame 38 est différente de la fréquence propre du reste de la plieuse. Ceci évite que les garnitures de freinage soient excitées par la plieuse lors du fonctionnement.Furthermore, the braking device 8 is provided with means for returning the braking jaw 26 towards its passage position. These return means comprise a leaf spring 38, a first end is fixed to the support 22 and a second end is fixed to the braking jaw 26 and carries it. Advantageously, the natural frequency of the blade 38 is different from the natural frequency of the rest of the folder. This prevents brake linings from being excited by the brake during operation.

Le dispositif de freinage 8 comporte en outre des moyens d'entraînement de la mâchoire 26 de sa position de passage vers sa position de freinage. Ces moyens d'entraînement comprennent un élément excentrique 40 mobile en rotation autour d'un axe de rotation X-X. L'élément excentrique 40 a une surface extérieure 41 ayant une section transversale en forme de cercle dont l'axe est décalé de l'axe de rotation X-X. En variante, l'élément excentrique 40 peut être remplacé par une came ayant une surface extérieure 41 à section non circulaire.The braking device 8 further comprises means for driving the jaw 26 from its passage position to its braking position. These drive means comprise an eccentric element 40 rotatable about an axis of rotation X-X. The eccentric member 40 has an outer surface 41 having a circle-shaped cross section whose axis is offset from the axis of rotation X-X. Alternatively, the eccentric member 40 may be replaced by a cam having an outer surface 41 of non-circular section.

L'élément excentrique 40 est mobile en rotation autour de l'axe X-X entre une position de passage correspondant à la position de passage de la mâchoire de freinage 26 (voir Figure 2) et une position de freinage correspondant à la position de freinage de la mâchoire de freinage 26. A cet effet, l'élément excentrique 40 est fixé en rotation sur un arbre 42 lui-même mobile en rotation autour de l'axe X-X. L'élément excentrique 40 s'applique avec sa surface extérieure 41 librement sur la surface de frottement de l'organe d'usure 36 de telle manière que lorsque l'élément excentrique 40 est dans sa position de passage, la mâchoire de freinage 26 est librement mobile de sa position de passage vers sa position de freinage en écartant l'organe d'usure 36 de l'élément excentrique 40 et à l'encontre de la force de rappel du ressort 38.The eccentric element 40 is rotatable about the axis XX between a passage position corresponding to the passage position of the brake jaw 26 (see FIG. Figure 2 ) and a braking position corresponding to the braking position of the brake jaw 26. For this purpose, the eccentric element 40 is fixed in rotation on a shaft 42 itself rotatable about the axis XX. The eccentric element 40 applies with its outer surface 41 freely on the friction surface of the wear member 36 so that when the eccentric member 40 is in its passage position, the brake shoe 26 is freely movable from its position of passage to its braking position by removing the wear member 36 from the eccentric member 40 and against the return force of the spring 38.

L'élément excentrique 40 est fabriqué en une matière plus dure que l'organe d'usure 36, par exemple en acier.The eccentric member 40 is made of a harder material than the wear member 36, for example of steel.

Le ressort à lame 38 maintient la mâchoire de freinage 26 dans sa position de passage à l'état de repos, et rappelle cette mâchoire de freinage 26 vers sa position de passage lorsque celle-ci se trouve dans sa position de freinage.The leaf spring 38 maintains the braking jaw 26 in its position of passage to the idle state, and recalls the braking jaw 26 towards its passage position when the latter is in its braking position.

Le dispositif de freinage 8 comporte des moyens d'entraînement en rotation de l'arbre 42. En l'occurrence, ces moyens d'entraînement comportent un moteur électrique 44 pour chaque arbre 42, moteur 44 dont l'arbre de sortie est relié par l'intermédiaire d'une liaison à double joint cardan 46 à l'arbre 42. La liaison à double joint cardan permet le réglage en hauteur de l'ensemble constitué des ressorts à lame 38, support de lame 22, et des arbres 42, sachant que les moteurs 44 sont fixés au bâti 10. De plus, cela permet de déplacer les garnitures de freinage entre une position d'appui et une position hors appui sur la table de pliage 18.The braking device 8 comprises means for driving in rotation the shaft 42. In this case, these drive means comprise an electric motor 44 for each shaft 42, motor 44 whose output shaft is connected by by means of a double cardan joint connection 46 to the shaft 42. The double universal joint connection allows the height adjustment of the assembly consisting of leaf springs 38, blade support 22, and shafts 42, knowing that the motors 44 are fixed to the frame 10. In addition, it allows to move the brake linings between a support position and an off-position on the folding table 18.

Un arbre 42 comporte au moins deux éléments excentriques 40, dont chacun coopère avec un organe d'usure 36, donc avec une garniture de freinage. Ainsi, deux ou plusieurs garnitures de freinage sont commandables par un seul arbre 42.A shaft 42 comprises at least two eccentric elements 40, each of which cooperates with a wear member 36, thus with a brake lining. Thus, two or more brake linings are controllable by a single shaft 42.

Aussi, l'arbre 42 est logé en rotation au support 22 mais par ailleurs fixé par rapport à celui-ci tandis que chaque moteur 44 est fixé au bâti 10.Also, the shaft 42 is rotatably accommodated to the support 22 but also fixed relative thereto while each motor 44 is fixed to the frame 10.

La plieuse 2 comporte en outre des moyens de commande 50 afin de commander chaque moteur 44 et en conséquence l'élément excentrique 40 d'une manière synchronisée avec l'arrivée des produits plats à plier sur la table de pliage 18.The folder 2 further comprises control means 50 for controlling each motor 44 and consequently the eccentric element 40 in a manner synchronized with the arrival of the flat products to be folded on the folding table 18.

A cet effet, les moyens de commande 50 comprennent un capteur 52 relevant la position et/ou la vitesse des produits à plier 23 et délivrant un signal correspondant à une unité de commande 54. L'unité de commande 54 est reliée à chaque moteur 44. Ainsi, les moyens de commande 50 sont adaptés pour amener l'élément excentré 40 en rotation de telle manière que les mâchoires de freinage 26 s'appliquent exclusivement sur une partie aval d'un produit plat à plier 23. La partie amont du produit plat 23 n'est pas freinée par contact avec la garniture de freinage 26.For this purpose, the control means 50 comprise a sensor 52 raising the position and / or the speed of the products to be folded 23 and delivering a signal corresponding to a control unit 54. The control unit 54 is connected to each motor 44 Thus, the control means 50 are adapted to bring the eccentric member 40 in rotation so that the braking jaws 26 apply exclusively to a downstream part of a flat product to be bent 23. The upstream part of the product plate 23 is not braked by contact with the brake lining 26.

La plieuse suivant l'invention est avantageuse étant donné que les éléments excentriques 40 peuvent être mis en rotation à une vitesse élevée. En conséquence, la plieuse peut être entraînée à des cadences de pliage élevées, par exemple, de 70 000 exemplaires par heure.The folder according to the invention is advantageous since the eccentric members 40 can be rotated at a high speed. As a result, the folder can be driven at high bend rates, for example, 70,000 copies per hour.

Les moteurs 44 sont synchronisés avec un moteur d'entraînement de la plieuse 2.The motors 44 are synchronized with a drive motor of the folder 2.

Les deux moteurs 44 peuvent être commandés de telle sorte que la phase de rotation des éléments excentriques 40 associés à un moteur 44 est décalée de la phase de rotation des éléments excentriques 40 associés à un autre moteur 44.The two motors 44 can be controlled so that the phase of rotation of the eccentric elements 40 associated with a motor 44 is shifted from the phase of rotation of the eccentric elements 40 associated with another motor 44.

Ceci permet de pouvoir décaler l'action des garnitures de freinage aval par rapport aux garnitures de freinage amont.This makes it possible to be able to shift the action of the downstream brake linings with respect to the upstream braking linings.

Egalement, deux moteurs 44 peuvent entraîner indépendamment l'un de l'autre des garnitures de freinage disposées de part et d'autre de la lame de pliage 12. Dans ce cas il est possible de décaler l'action des garnitures de freinage, situées de part et d'autre de la lame 12 , afin de redresser le travers du cahier. En d'autres termes, la variation des moteurs 44 des mâchoires de freinage 26 situées de part et d'autre de la lame 12, permet de corriger le travers d'un cahier non perpendiculaire à la lame 12.Also, two motors 44 can independently drive brake linings arranged on either side of the folding blade 12 in each case. In this case it is possible to shift the action of the brake linings located on both sides of the blade 12, to straighten the cross of the notebook. In other words, the variation of the motors 44 of the brake jaws 26 located on either side of the blade 12 makes it possible to correct the cross-section of a booklet that is not perpendicular to the blade 12.

Aussi, le phasage des moteurs 44 par rapport aux signatures 23 est modifiable.Also, the phasing of the motors 44 with respect to the signatures 23 is modifiable.

Sur la Figure 4 est montrée une variante de la plieuse selon l'invention, qui diffère par la plieuse précédemment décrite par ce que suit.On the Figure 4 is shown a variant of the folder according to the invention, which differs by the folder previously described by what follows.

La liaison à joint cardan 46 et les moteurs 44 ont été remplacés par un seul arbre entraîné 42 par un seul moteur 44, un deuxième arbre 42A étant entraîné par l'intermédiaire d'une liaison à courroie dentée 50. Les deux arbres sont fixes en translation l'un par rapport à l'autre. L'avantage de cette variante est son faible coût.The cardan joint 46 and the motors 44 have been replaced by a single driven shaft 42 by a single motor 44 , a second shaft 42A being driven through a toothed belt connection 50. The two shafts are fixed by translation with respect to each other. The advantage of this variant is its low cost.

Claims (13)

Dispositif de freinage d'un produit plat, notamment d'une signature, du type comportant - un support (22), - une mâchoire de freinage (26) du produit plat (23), mobile entre une position de passage du produit plat et une position de freinage du produit plat, - des moyens d'entraînement (40, 42) de la mâchoire de freinage (26) de sa position de passage vers sa position de freinage, caractérisé en ce que les moyens d'entraînement comprennent un élément excentrique (40) mobile en rotation et coopérant avec la mâchoire de freinage (26).Braking device for a flat product, in particular a signature, of the type comprising a support (22), - A braking jaw (26) of the flat product (23), movable between a flat product passage position and a braking position of the flat product, - drive means (40, 42) of the brake jaw (26) from its passage position to its braking position, characterized in that the drive means comprises an eccentric member (40) movable in rotation and cooperating with the braking jaw (26). Dispositif de freinage selon la revendication 1, caractérisé en ce que l'élément excentrique (40) est mobile en rotation notamment entre une position de passage correspondant à la position de passage de la mâchoire de freinage (26) et une position de freinage correspondant à la position de freinage de la mâchoire de freinage (26), et en ce que la mâchoire de freinage (26) est librement mobile entre ses positions de passage et de freinage lorsque l'élément excentrique (40) est dans sa position de passage.Braking device according to claim 1, characterized in that the eccentric element (40) is rotatable, in particular between a passage position corresponding to the passage position of the braking jaw (26) and a braking position corresponding to the braking position of the braking jaw (26), and in that the braking jaw (26) is freely movable between its passage and braking positions when the eccentric member (40) is in its passage position. Dispositif de freinage selon la revendication 1 ou 2, caractérisé en ce que la mâchoire de freinage (26) comporte une face de freinage (28) dirigée vers le produit plat à freiner (23) à l'état installé et une face d'actionnement (30) disposée à l'opposé de la face de freinage, et en ce que l'élément excentrique (40) coopère avec la face d'actionnement (30).Braking device according to claim 1 or 2, characterized in that the braking jaw (26) has a braking face (28) facing the flat brake product (23) in the installed state and an operating face. (30) disposed opposite the braking face, and in that the eccentric element (40) cooperates with the actuating face (30). Dispositif de freinage selon la revendication 3, caractérisé en ce que la mâchoire de freinage (26) comporte un corps de base (32) et un organe d'usure (36), et en ce que l'organe d'usure (36) est en contact avec l'élément excentrique (40).Braking device according to claim 3, characterized in that the braking jaw (26) comprises a base body (32) and a wear member (36), and in that the wear member (36) is in contact with the eccentric member (40). Dispositif de freinage selon la revendication 4, caractérisé en ce que l'organe d'usure (36) est en une matière moins dure que l'élément excentrique (40), et est notamment en bronze.Braking device according to Claim 4, characterized in that the wear member (36) is made of a material which is less hard than the eccentric element (40), and is in particular of bronze. Dispositif de freinage selon la revendication 4 ou 5, caractérisé en ce que l'élément excentrique (40) est fabriqué en une matière plus dure que l'organe d'usure (36), par exemple en acier.Braking device according to claim 4 or 5, characterized in that the eccentric element (40) is made of a material which is harder than the wear member (36), for example of steel. Dispositif de freinage selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comprend des moyens de rappel de la mâchoire de freinage (26) vers sa position de passage, notamment un ressort (38).Braking device according to any one of claims 1 to 6, characterized in that it comprises means for returning the braking jaw (26) to its passage position, in particular a spring (38). Dispositif de freinage selon la revendication 7, caractérisé en ce que les moyens de rappel comprennent un ressort à lame (38) fixé à la mâchoire de freinage (26) et au support (22).Braking device according to claim 7, characterized in that the return means comprise a leaf spring (38) fixed to the braking jaw (26) and to the support (22). Dispositif de freinage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend des moyens d'entraînement en rotation de l'élément excentrique (40), notamment un moteur (44) et une liaison à joints cardan (46).Braking device according to any one of the preceding claims, characterized in that it comprises means for rotating the eccentric element (40), in particular a motor (44) and a universal joint (46). . Dispositif de freinage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément excentrique (40) est mobile en rotation autour d'un axe de rotation (X-X), l'élément excentrique (40) ayant une surface extérieure (41) ayant une section transversale en forme de cercle dont l'axe est décalé de l'axe de rotation (X-X).Braking device according to one of the preceding claims, characterized in that the eccentric element (40) is rotatable about an axis of rotation (XX), the eccentric element (40) having an outer surface ( 41) having a circular cross-section whose axis is offset from the axis of rotation (XX). Dispositif de freinage selon l'une quelconque des revendications 1 à 9, caractérisé en ce que l'élément excentrique (40) est une came ayant une surface extérieure (41) à section non circulaire.Braking device according to any one of claims 1 to 9, characterized in that the eccentric element (40) is a cam having an outer surface (41) of non-circular section. Plieuse munie d'un dispositif de pli d'équerre comprenant une table de pliage (18) et d'un dispositif de freinage de produits plats à plier (23) arrivant sur la table de pliage (18), caractérisée en ce que le dispositif de freinage est muni d'un dispositif de freinage selon l'une quelconque des revendications précédentes.Folder provided with a right-angle folding device comprising a folding table (18) and a braking device for folding flat products (23) arriving on the folding table (18), characterized in that the device braking system is provided with a braking device according to any one of the preceding claims. Plieuse selon la revendication 12, caractérisée en ce que le dispositif de freinage (8) comprend des moyens de commande de l'élément excentrique adaptés pour freiner exclusivement la partie aval d'un produit plat (23) à plier.Folder according to claim 12, characterized in that the braking device (8) comprises control means of the eccentric element adapted to exclusively brake the downstream portion of a flat product (23) to be folded.
EP08158853A 2007-06-28 2008-06-24 Device for braking flat products and corresponding folding machine Not-in-force EP2008957B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0756108A FR2918048B1 (en) 2007-06-28 2007-06-28 DEVICE FOR BRAKING FLAT PRODUCTS AND CORRESPONDING BENDER.

Publications (2)

Publication Number Publication Date
EP2008957A1 true EP2008957A1 (en) 2008-12-31
EP2008957B1 EP2008957B1 (en) 2012-08-15

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Application Number Title Priority Date Filing Date
EP08158853A Not-in-force EP2008957B1 (en) 2007-06-28 2008-06-24 Device for braking flat products and corresponding folding machine

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US (1) US7931268B2 (en)
EP (1) EP2008957B1 (en)
JP (1) JP2009007171A (en)
CN (1) CN101348197B (en)
FR (1) FR2918048B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009003237A1 (en) * 2009-03-27 2010-10-07 Koenig & Bauer Aktiengesellschaft Method for correcting a skew of a product on a folding table of a longitudinal folder and a longitudinal folder

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GB654338A (en) * 1947-11-19 1951-06-13 Dexter Folder Co Improvements relating to sheet-feeding mechanism
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FR2793229A1 (en) 1999-05-07 2000-11-10 Roland Man Druckmasch DEVICE FOR BRAKING PAPER SHEETS
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GB288456A (en) * 1927-04-15 1928-04-12 American Type Founders Co Improvements in or relating to sheet retarding mechanisms for use with sheet feeding mechanisms
GB654338A (en) * 1947-11-19 1951-06-13 Dexter Folder Co Improvements relating to sheet-feeding mechanism
GB1343303A (en) * 1971-03-02 1974-01-10 Polygraph Leipzig Method and apparatus for the accurately-registered feed of sheets to a printing machine
EP0639523A1 (en) * 1993-08-17 1995-02-22 Rockwell Graphic Systems Inc. Folding apparatus
FR2793229A1 (en) 1999-05-07 2000-11-10 Roland Man Druckmasch DEVICE FOR BRAKING PAPER SHEETS
DE19921169A1 (en) * 1999-05-07 2000-11-16 Roland Man Druckmasch Device for reducing the speed of paper sheets by braking applies the force effects of an electromagnet to cause a braking effect on the rear edge of paper sheets.
WO2005082757A1 (en) * 2004-03-01 2005-09-09 Koenig & Bauer Aktiengesellschaft Longitudinal folding device provided with a braking distance

Also Published As

Publication number Publication date
JP2009007171A (en) 2009-01-15
EP2008957B1 (en) 2012-08-15
FR2918048A1 (en) 2009-01-02
US7931268B2 (en) 2011-04-26
US20090008870A1 (en) 2009-01-08
CN101348197A (en) 2009-01-21
FR2918048B1 (en) 2011-05-20
CN101348197B (en) 2012-05-30

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