EP2039639B1 - Folding roller and folding device - Google Patents

Folding roller and folding device Download PDF

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Publication number
EP2039639B1
EP2039639B1 EP08164704A EP08164704A EP2039639B1 EP 2039639 B1 EP2039639 B1 EP 2039639B1 EP 08164704 A EP08164704 A EP 08164704A EP 08164704 A EP08164704 A EP 08164704A EP 2039639 B1 EP2039639 B1 EP 2039639B1
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EP
European Patent Office
Prior art keywords
folding
axial portion
folded
product
axial
Prior art date
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Active
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EP08164704A
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German (de)
French (fr)
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EP2039639A1 (en
Inventor
Philippe Herda
Jérôme PERES
Eric Pierda
Franck Chagnon
Thierry Vauchelle
Thierry Melon
Mathieu Rossi
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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 EP2039639A1 publication Critical patent/EP2039639A1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs

Definitions

  • Folding rollers comprising front and rear axial sections are known in the state of the art.
  • the rear axial portion extends at a rear portion of a signature to be folded, while the forward axial portion extends at a leading edge of a signature to be folded.
  • the rear axial section comprises a recess adapted to release the upper part of the signature to be folded to prevent creases of the downstream part of the folded notebook.
  • the known folding rolls are adapted to grip the current part of the notebook at its front edge to fold the notebook.
  • the document EP 0 855 356 A2 discloses two folding rolls for a folder. These folding rollers consist, from the outside towards the inside, of two traction rings followed by an intermediate ring and a main body. The edges of the roll are provided with clearances releasing the signature during folding and thus avoiding creases in the signature.
  • the central body has two grooves for guiding routing cords.
  • the document EP 0 366 611 A2 describes two folding rolls. These folding rolls are divided, according to their circumference, into three zones. An area corresponds to the folding zone with a cylindrical surface. This folding zone extends over approximately one third of the length of the signature. This zone is only interrupted by grooves used to guide routing cords. The second zone corresponds to the second third of the signature and has a central clearance surrounded to the right and left of two surfaces. The edges of the signature apply to both surfaces. The last zone corresponds to the free third of the signature and is formed by a clearance that extends over the entire width of the guide rollers.
  • the document US 4, 781, 667 shows two variants of folding rollers.
  • the first variant has a clearance that extends over the entire width of the roll.
  • the second variant corresponds to a roll with two peripheral clearances. However, the clearances have an angular extent of the order of 90 °. Also, this document relates to a second fold and not to the square fold.
  • the object of the invention is to improve the quality of folding, especially at high folding speeds.
  • the subject of the invention is a roll according to the features of claim 1.
  • Folder 2 is a square bender of a rotary press, including an offset press.
  • the folder 2 comprises a folding table 4, a folding blade 6, two folding rollers 8 and 10, as well as routing cords 12.
  • the folder 2 is adapted to fold a signature S conveyed by the routing cords 12 on the folding table.
  • the folding table 4 extends according to a table plane P-P, and defines a folding slot 14.
  • the folding blade 6 is disposed above the folding table 4 and is adapted to push the central portion 24 of a signature S through the folding slot 14.
  • the folding rollers 8, 10 each extend along a central axis XX and define a folding gap 16 between them.
  • the folding roller 8 is driven in a first direction of rotation R1 and the folding roller 10 is driven in a second direction of rotation R2 opposite the first direction of rotation R1.
  • the folder 2 comprises a stop 18 adapted to stop the signature S before folding.
  • the routing cords 12 are driven in a driving direction E or conveying direction extending from an entrance of the folder 2 to the stop 18.
  • Each signature S delimits a front edge 20 directed downstream of the driving direction E and a rear edge 22 directed upstream of the driving direction E.
  • Each signature S also having a central portion 24 which is folded by the blade 6 and the folding rollers 8 and 10.
  • Each signature also has two lateral edges 26 extending parallel to the drive direction E.
  • the signature S has a single flat sheet.
  • the signature S comprises at least one folded sheet whose fold forms the front edge 20.
  • the folding roll 8 being symmetrical (see figure 6 ) with respect to a blade plane in which the folding blade 6 extends.
  • the folding roll 8 comprises a first axial section 30, a second axial section 32, a third axial section 34 and a fourth axial section 36.
  • the first axial section 30 comprises a first folding surface 40 of the signature S to be folded.
  • This fold surface 40 is a circular cylinder surface with a circular section around the central axis X-X.
  • the first axial portion 30 further comprises an auxiliary clearance 42 which is radially recessed with respect to the first folding surface 40.
  • This auxiliary clearance 42 comprises plane facets.
  • the first axial portion 30 extends during folding at the rear edge 22 of the signature S.
  • the junction between the first folding surface 40 and the auxiliary clearance 42 forms a first joining edge A located at the downstream end of the auxiliary clearance 42, viewed according to the first direction of rotation R1.
  • the auxiliary clearance 42 extends around the central axis X-X over an angular range between 120 and 160 °, and preferably between 140 and 150 °.
  • the roller 8 is driven in such a way that the first folding surface 40 grips the central portion 24 when the folding blade 6 pushes the signature S
  • the first two folding surfaces 40 of the folding rollers 8, 10 grip the central portion 24 of the signature S.
  • the second axial portion 32 extends axially so as to overlap the front edge 20 during folding during operation of the folder.
  • the second axial portion 32 and therefore the auxiliary clearance 42, axially overlaps the stop 18.
  • the second axial portion 32 has a main recess 44 which is radially recessed with respect to the folding surface 40 of the first axial section 30.
  • the second axial portion 32 further comprises a second folding surface 46, which is a partial cylinder surface with circular section about the axis XX.
  • the second folding surface 46 is radially aligned with the first folding surface 40.
  • the main clearance 44 extends around the central X-X axis over an angular range preferably between 320 and 325 °. In general, it may be greater than 270 °, in particular greater than one of the ranges 300 °, 310 ° and 320 °, and this angular range is at most 325 °.
  • the junction between the second folding surface 46 and the main clearance 44 forms a second joining edge B located at the downstream end of the main clearance 44, seen in the first direction of rotation R1.
  • the first joining edge A and the second joining edge B are circumferentially aligned.
  • the junction between the second folding surface 46 and the main clearance 44 forms a third joining edge C located at the upstream end of the main clearance 44 seen in the first direction of rotation R1.
  • This third joining edge C is circumferentially overlapped by the folding surface 40.
  • the angular range of the auxiliary clearance 42 completely overlaps the angular range of the main clearance 44 in the circumferential direction around the central axis X-X.
  • the folding surfaces 40 and 46 are axially aligned.
  • the main clearance 44 and the auxiliary clearance 42 thus extend over different angular ranges around the central axis X-X.
  • the third axial portion 34 extends axially between the first axial section 30 and the second axial section 32.
  • the third axial section 34 is provided with a third folding surface 48 all around the central axis XX.
  • the third folding surface 48 thus has a cylindrical shape with a complete circular section around the central axis.
  • the third folding surface 48 is radially aligned with the first folding surface 40. This third axial section is therefore adapted to grip the signature S over its entire width between its central portion 24 and its lateral edges 26.
  • the third axial portion 34 is further provided with two grooves 50, 52 all around.
  • the folder 2 also comprises strippers 58 which engage in the grooves 50, 52 and which are adapted to guide the folded signature and to remove it from the folding rollers 8, 10.
  • the fourth axial portion 36 has a cylindrical surface with a circular section centered on the X-X axis.
  • the second axial section 32 is arranged axially between the fourth axial section 36 and the first axial section 30 or the third axial section 34.
  • the folding roll 8 further comprises two journals 60 disposed on each side of the roll.
  • Folder 2 operates in the following manner.
  • the signatures S are transported by the routing cords 12 to the stop 18.
  • the folding blade 6 pushes the central portion 24 through the folding slot 14 and the central portion 24 is grasped by the first folding surface 40 as well as by the third folding surface 48
  • the portion of the central portion 24 which overlaps the second axial portion 32, as well as the portion of the front edge 20 adjacent to the central portion are first grasped by the second folding surface 46.
  • the signature S is routed through the folding gap 16 through the first, second and third folding surfaces until the main clearance 44 releases the leading edge portion 20 of the signature at a location at distance of the fold formed in the central portion 24.
  • the first folding surface 40 as well as the third folding surface 48 continue the drive of the signature through the gap 16.
  • the lateral edges 26 of the signature S are released at the level of the first axial section 30 by the auxiliary clearance 42. This avoids the inadvertent folding of the lateral edges, at the level of the rear edge 22.
  • the folding rollers according to the invention release a large part of the front edge 20, they make it possible to avoid creases at the front edge 20 at the location of the central part 24, and this even at high folding.

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Description

La présente invention concerne un rouleau de pliage pour une plieuse d'un produit plat à plier, le rouleau s'étendant selon un axe central et comprenant :

  • un premier tronçon axial, et
  • un deuxième tronçon axial,
le premier tronçon axial ayant une première surface de pliage du produit à plier.The present invention relates to a folding roll for a folder of a flat product to be folded, the roll extending along a central axis and comprising:
  • a first axial section, and
  • a second axial section,
the first axial section having a first folding surface of the product to be folded.

On connaît dans l'état de la technique des rouleaux de pliage comprenant des tronçons axiaux avant et arrière. Pendant l'utilisation, le tronçon axial arrière s'étend au niveau d'une partie arrière d'une signature à plier, tandis que le tronçon axial avant s'étend au niveau d'un bord avant d'une signature à plier.Folding rollers comprising front and rear axial sections are known in the state of the art. In use, the rear axial portion extends at a rear portion of a signature to be folded, while the forward axial portion extends at a leading edge of a signature to be folded.

Le tronçon axial arrière comprend un évidement adapté pour libérer la partie supérieure de la signature à plier afin d'éviter des plissures de la partie avale du cahier plié.The rear axial section comprises a recess adapted to release the upper part of the signature to be folded to prevent creases of the downstream part of the folded notebook.

Les rouleaux de pliage connus sont adaptés pour saisir la partie courante du cahier au niveau de son bord avant afin de plier le cahier.The known folding rolls are adapted to grip the current part of the notebook at its front edge to fold the notebook.

Toutefois, il a été constaté que les rouleaux de pliage connus conduisent à des plissures au niveau du bord avant à l'emplacement du pli.However, it has been found that known bending rolls lead to creases at the leading edge at the fold location.

Le document EP 0 855 356 A2 divulgue deux rouleaux de pliage pour une plieuse. Ces rouleaux de pliage sont constitués, de l'extérieur vers l'intérieur, de deux bagues de traction suivies d'une bague intermédiaire et d'un corps principal. Les bords du rouleau sont pourvus de dégagements libérant la signature lors du pliage et permettant ainsi d'éviter des plissures au niveau de la signature. Le corps central dispose de deux rainures pour le guidage de cordons d'acheminement.The document EP 0 855 356 A2 discloses two folding rolls for a folder. These folding rollers consist, from the outside towards the inside, of two traction rings followed by an intermediate ring and a main body. The edges of the roll are provided with clearances releasing the signature during folding and thus avoiding creases in the signature. The central body has two grooves for guiding routing cords.

Le document EP 0 366 611 A2 décrit deux rouleaux de pliage. Ces rouleaux de pliage sont divisés, selon leur circonférence, en trois zones. Une zone correspond à la zone de pliage avec une surface cylindrique. Cette zone de pliage s'étend sur environ un tiers de la longueur de la signature. Cette zone est uniquement interrompue par des rainures servant au guidage de cordons d'acheminement. La deuxième zone correspond au deuxième tiers de la signature et présente un dégagement central entouré à droite et à gauche de deux surfaces. Les bords de la signature s'appliquent sur les deux surfaces. La dernière zone correspond au tiers libre de la signature et est formé par un dégagement qui s'étend sur toute la largeur des rouleaux de guidage.The document EP 0 366 611 A2 describes two folding rolls. These folding rolls are divided, according to their circumference, into three zones. An area corresponds to the folding zone with a cylindrical surface. This folding zone extends over approximately one third of the length of the signature. This zone is only interrupted by grooves used to guide routing cords. The second zone corresponds to the second third of the signature and has a central clearance surrounded to the right and left of two surfaces. The edges of the signature apply to both surfaces. The last zone corresponds to the free third of the signature and is formed by a clearance that extends over the entire width of the guide rollers.

Le document US 4, 781, 667 montre deux variantes de rouleaux de pliage. La première variante présente un dégagement qui s'étend sur toute la largeur du rouleau. La deuxième variante correspond à un rouleau avec deux dégagements périphériques. Toutefois, les dégagements ont une étendue angulaire de l'ordre de 90°. Aussi, ce document a trait à un deuxième pli et non au pli d'équerre.The document US 4, 781, 667 shows two variants of folding rollers. The first variant has a clearance that extends over the entire width of the roll. The second variant corresponds to a roll with two peripheral clearances. However, the clearances have an angular extent of the order of 90 °. Also, this document relates to a second fold and not to the square fold.

L'invention a pour objet d'améliorer la qualité de pliage, notamment à des vitesses élevées de pliage.The object of the invention is to improve the quality of folding, especially at high folding speeds.

A cet effet, l'invention a pour objet un rouleau selon les caractéristiques de la revendication 1.For this purpose, the subject of the invention is a roll according to the features of claim 1.

Selon des modes particuliers de réalisation, le rouleau de pliage comporte une ou plusieurs des caractéristiques suivantes :

  • la première et la deuxième surface de pliage sont radialement alignées ;
  • le premier tronçon axial comporte un dégagement auxiliaire radialement en retrait par rapport à la première surface de pliage, le dégagement auxiliaire et le dégagement principal s'étendant sur des plages angulaires différentes autour de l'axe central;
  • le dégagement auxiliaire s'étend sur une plage angulaire comprise entre 120 et 160°, et de préférence entre 140° et 150°, autour de l'axe central ;
  • la première surface de pliage et le dégagement auxiliaire forment un premier bord de jonction ; la deuxième surface de pliage et le dégagement principal forment un deuxième bord de jonction, et le premier bord de jonction et le deuxième bord de jonction sont circonférentiellement alignés ;
  • le rouleau comprend un troisième tronçon axial ayant une troisième surface de pliage qui fait tout le tour autour de l'axe central, qui est centrée sur l'axe central et qui est alignée radialement avec la première surface de pliage, le troisième tronçon axial s'étendant axialement entre le premier tronçon axial et le deuxième tronçon axial ;
  • le rouleau comprend un quatrième tronçon axial définissant une surface cylindrique faisant tout le tour, centrée sur l'axe central, et alignée radialement avec la première surface de pliage, et le deuxième tronçon axial est disposé axialement entre le premier tronçon axial et le quatrième tronçon axial et;
  • le rouleau comporte au moins une rainure faisant tout le tour et s'étendant axialement entre le premier tronçon axial et le deuxième tronçon axial.
According to particular embodiments, the folding roll has one or more of the following features:
  • the first and second fold surfaces are radially aligned;
  • the first axial section has an auxiliary clearance radially recessed with respect to the first folding surface, the auxiliary clearance and the main clearance extending over different angular ranges around the central axis;
  • the auxiliary clearance extends over an angular range between 120 and 160 °, and preferably between 140 ° and 150 °, about the central axis;
  • the first folding surface and the auxiliary clearance form a first joining edge; the second folding surface and the main clearance form a second joining edge, and the first joining edge and the second joining edge are circumferentially aligned;
  • the roller comprises a third axial section having a third bending surface which runs around the central axis, which is centered on the central axis and which is radially aligned with the first bending surface, the third axial section extending axially between the first axial section and the second axial section;
  • the roller comprises a fourth axial section defining a cylindrical surface which is all around, centered on the central axis, and aligned radially with the first folding surface, and the second axial section is arranged axially between the first axial section and the fourth section. axial and;
  • the roller comprises at least one groove running around and extending axially between the first axial section and the second axial section.

L'invention a également pour objet une plieuse, du type comportant :

  • une lame de pliage ;
  • deux rouleaux de pliage définissant un interstice de pliage entre eux, au moins l'un des rouleaux de pliage étant un rouleau de pliage tel que défini ci-dessus.
The invention also relates to a folder, of the type comprising:
  • a folding blade;
  • two folding rollers defining a folding gap therebetween, at least one of the folding rollers being a folding roll as defined above.

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

  • la plieuse définit un sens d'acheminement de produits à plier, et le deuxième tronçon axial est disposé en aval du premier tronçon axial dans le sens d'acheminement ;
  • les deux rouleaux de pliage sont adaptés pour être entraînés de telle manière que; leur deuxième surface de pliage est adaptée pour chevaucher une partie centrale d'un produit à plier à l'emplacement d'un bord avant de ce produit, et le dégagement principal est adapté pour chevaucher une partie latérale du bord avant du produit à plier, lorsque le produit à plier est saisi par les deux rouleaux ;
  • la plieuse comporte une butée adaptée pour stopper le produit à plier, et la butée est axialement alignée avec le dégagement principal.
According to particular embodiments, the folder comprises one or more of the following features:
  • the folder defines a conveying direction of products to be folded, and the second axial section is disposed downstream of the first axial section in the direction of delivery;
  • the two folding rollers are adapted to be driven in such a way that; their second folding surface is adapted to overlap a central portion of a product to be folded at the location of a front edge of this product, and the main clearance is adapted to overlap a lateral portion of the front edge of the product to be folded, when the product to be folded is grasped by the two rollers;
  • the folder comprises a stop adapted to stop the product to be bent, and the stop is axially aligned with the main release.

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 coupe d'une plieuse selon l'invention ;
  • la Figure 2 est une vue de côté partiellement coupée de la plieuse selon l'invention, vue selon la coupe II de la Figure 1 ;
  • la Figure 3 est une vue correspondante à la vue de la Figure 2 de la plieuse avant le pliage ;
  • les Figures 4 et 5 sont des vues en perspective d'un rouleau de pliage selon l'invention ; et
  • la figure 6 est une vue axiale schématique des rouleaux de pliage et de décolleurs.
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 sectional view of a folder according to the invention;
  • the Figure 2 is a partially cutaway side view of the folder according to the invention, seen according to section II of FIG. Figure 1 ;
  • the Figure 3 is a view corresponding to the view of the Figure 2 Folder before folding
  • the Figures 4 and 5 are perspective views of a folding roll according to the invention; and
  • the figure 6 is a schematic axial view of the folding rolls and strippers.

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

La plieuse 2 constitue une plieuse d'équerre d'une presse rotative, notamment d'une presse offset.Folder 2 is a square bender of a rotary press, including an offset press.

La plieuse 2 comporte une table de pliage 4, une lame de pliage 6, deux rouleaux de pliage 8 et 10, ainsi que des cordons d'acheminement 12.The folder 2 comprises a folding table 4, a folding blade 6, two folding rollers 8 and 10, as well as routing cords 12.

La plieuse 2 est adaptée pour plier une signature S acheminée par les cordons d'acheminement 12 sur la table de pliage.The folder 2 is adapted to fold a signature S conveyed by the routing cords 12 on the folding table.

La table de pliage 4 s'étend selon un plan de table P-P, et définit une fente de pliage 14.The folding table 4 extends according to a table plane P-P, and defines a folding slot 14.

La lame de pliage 6 est disposée au-dessus de la table de pliage 4 et est adaptée pour pousser la partie centrale 24 d'une signature S à travers la fente de pliage 14.The folding blade 6 is disposed above the folding table 4 and is adapted to push the central portion 24 of a signature S through the folding slot 14.

Les rouleaux de pliage 8,10 s'étendent chacun selon un axe central X-X et délimitent un interstice de pliage 16 entre eux. Le rouleau de pliage 8 est entraîné selon un premier sens de rotation R1 et le rouleau de pliage 10 est entraîné selon un deuxième sens de rotation R2 opposé au premier sens de rotation R1.The folding rollers 8, 10 each extend along a central axis XX and define a folding gap 16 between them. The folding roller 8 is driven in a first direction of rotation R1 and the folding roller 10 is driven in a second direction of rotation R2 opposite the first direction of rotation R1.

Par ailleurs, la plieuse 2 comporte une butée 18 adaptée pour stopper la signature S avant son pliage.Furthermore, the folder 2 comprises a stop 18 adapted to stop the signature S before folding.

Les cordons d'acheminement 12 sont entraînés selon un sens d'entraînement E ou sens d'acheminement s'étendant d'une entrée de la plieuse 2 vers la butée 18.The routing cords 12 are driven in a driving direction E or conveying direction extending from an entrance of the folder 2 to the stop 18.

Chaque signature S délimite un bord avant 20 dirigé vers l'aval du sens d'entraînement E ainsi qu'un bord arrière 22 dirigé vers l'amont du sens d'entraînement E. Chaque signature S comportant aussi une partie centrale 24 qui est pliée par la lame 6 et les rouleaux de pliage 8 et 10. Chaque signature comporte également deux bords latéraux 26 s'étendant parallèlement au sens d'entraînement E.Each signature S delimits a front edge 20 directed downstream of the driving direction E and a rear edge 22 directed upstream of the driving direction E. Each signature S also having a central portion 24 which is folded by the blade 6 and the folding rollers 8 and 10. Each signature also has two lateral edges 26 extending parallel to the drive direction E.

La signature S comporte une seule feuille plate. En variante, la signature S comporte au moins une feuille pliée dont le pli forme le bord avant 20.The signature S has a single flat sheet. In a variant, the signature S comprises at least one folded sheet whose fold forms the front edge 20.

Dans ce qui suit, les caractéristiques du rouleau de pliage 8 seront décrits, le rouleau de pliage 10 étant symétrique (voir figure 6) par rapport à un plan de lame dans lequel s'étend la lame de pliage 6.In the following, the characteristics of the folding roll 8 will be described, the folding roll 10 being symmetrical (see figure 6 ) with respect to a blade plane in which the folding blade 6 extends.

Le rouleau de pliage 8 comporte un premier tronçon axial 30, un deuxième tronçon axial 32, un troisième tronçon axial 34 et un quatrième tronçon axial 36.The folding roll 8 comprises a first axial section 30, a second axial section 32, a third axial section 34 and a fourth axial section 36.

Le premier tronçon axial 30 comporte une première surface de pliage 40 de la signature S à plier. Cette surface de pliage 40 est une surface de cylindre partiel à section circulaire autour de l'axe central X-X.The first axial section 30 comprises a first folding surface 40 of the signature S to be folded. This fold surface 40 is a circular cylinder surface with a circular section around the central axis X-X.

Le premier tronçon axial 30 comporte en outre un dégagement auxiliaire 42 qui est radialement en retrait par rapport à la première surface de pliage 40. Ce dégagement auxiliaire 42 comporte des facettes planes. Le premier tronçon axial 30 s'étend lors du pliage au niveau du bord arrière 22 de la signature S. La jonction entre la première surface de pliage 40 et le dégagement auxiliaire 42 forme un premier bord de jonction A situé à l'extrémité aval du dégagement auxiliaire 42, vu selon le premier sens de rotation R1.The first axial portion 30 further comprises an auxiliary clearance 42 which is radially recessed with respect to the first folding surface 40. This auxiliary clearance 42 comprises plane facets. The first axial portion 30 extends during folding at the rear edge 22 of the signature S. The junction between the first folding surface 40 and the auxiliary clearance 42 forms a first joining edge A located at the downstream end of the auxiliary clearance 42, viewed according to the first direction of rotation R1.

Le dégagement auxiliaire 42 s'étend autour de l'axe central X-X sur une plage angulaire comprise entre 120 et 160°, et de préférence comprise entre 140 et 150°.The auxiliary clearance 42 extends around the central axis X-X over an angular range between 120 and 160 °, and preferably between 140 and 150 °.

Le rouleau 8 est entraîné de telle manière que la première surface de pliage 40 saisisse la partie centrale 24 lorsque la lame de pliage 6 pousse la signature S dans l'interstice de pliage 16. En d'autres termes, les deux premières surfaces de pliage 40 des rouleaux de pliage 8,10 saisissent la partie centrale 24 de la signature S.The roller 8 is driven in such a way that the first folding surface 40 grips the central portion 24 when the folding blade 6 pushes the signature S In other words, the first two folding surfaces 40 of the folding rollers 8, 10 grip the central portion 24 of the signature S.

Le deuxième tronçon axial 32 s'étend axialement de telle sorte à chevaucher le bord avant 20 lors du pliage pendant le fonctionnement de la plieuse. A cet effet, le deuxième tronçon axial 32, et donc le dégagement auxiliaire 42, chevauche axialement la butée 18.The second axial portion 32 extends axially so as to overlap the front edge 20 during folding during operation of the folder. For this purpose, the second axial portion 32, and therefore the auxiliary clearance 42, axially overlaps the stop 18.

Le deuxième tronçon axial 32 comporte un dégagement principal 44 qui est radialement en retrait par rapport à la surface de pliage 40 du premier tronçon axial 30.The second axial portion 32 has a main recess 44 which is radially recessed with respect to the folding surface 40 of the first axial section 30.

Comme ceci est visible sur la Figure 5, le deuxième tronçon axial 32 comporte en outre une deuxième surface de pliage 46, qui est une surface de cylindre partiel à section circulaire autour de l'axe X-X. La deuxième surface de pliage 46 est radialement alignée avec la première surface de pliage 40.As this is visible on the Figure 5 , the second axial portion 32 further comprises a second folding surface 46, which is a partial cylinder surface with circular section about the axis XX. The second folding surface 46 is radially aligned with the first folding surface 40.

Le dégagement principal 44 s'étend autour de l'axe X-X central sur une plage angulaire comprise de préférence entre 320 et 325°. D'une manière générale, elle peut être supérieure à 270°, notamment supérieure à l'une des plages 300°, 310° et 320°, et cette plage angulaire est au maximum de 325°. La jonction entre la deuxième surface de pliage 46 et le dégagement principal 44 forme un deuxième bord de jonction B situé à l'extrémité aval du dégagement principal 44, vu selon le premier sens de rotation R1. Le premier bord de jonction A et le deuxième bord de jonction B sont circonférentiellement alignés.The main clearance 44 extends around the central X-X axis over an angular range preferably between 320 and 325 °. In general, it may be greater than 270 °, in particular greater than one of the ranges 300 °, 310 ° and 320 °, and this angular range is at most 325 °. The junction between the second folding surface 46 and the main clearance 44 forms a second joining edge B located at the downstream end of the main clearance 44, seen in the first direction of rotation R1. The first joining edge A and the second joining edge B are circumferentially aligned.

La jonction entre la deuxième surface de pliage 46 et le dégagement principal 44 forme un troisième bord de jonction C situé à l'extrémité amont du dégagement principal 44 vu selon le premier sens de rotation R1. Ce troisième bord de jonction C est circonférentiellement chevauché par la surface de pliage 40.The junction between the second folding surface 46 and the main clearance 44 forms a third joining edge C located at the upstream end of the main clearance 44 seen in the first direction of rotation R1. This third joining edge C is circumferentially overlapped by the folding surface 40.

La plage angulaire du dégagement auxiliaire 42 chevauche complètement la plage angulaire du dégagement principal 44 dans le sens circonférentiel autour de l'axe central X-X. En d'autres termes, les surfaces de pliage 40 et 46 sont axialement alignées. Le dégagement principal 44 et le dégagement auxiliaire 42 s'étendent ainsi sur des plages angulaires différentes autour de l'axe central X-X.The angular range of the auxiliary clearance 42 completely overlaps the angular range of the main clearance 44 in the circumferential direction around the central axis X-X. In other words, the folding surfaces 40 and 46 are axially aligned. The main clearance 44 and the auxiliary clearance 42 thus extend over different angular ranges around the central axis X-X.

Le troisième tronçon axial 34 s'étend axialement entre le premier tronçon axial 30 et le deuxième tronçon axial 32. Le troisième tronçon axial 34 est muni d'une troisième surface de pliage 48 faisant tout le tour de l'axe central X-X. La troisième surface de pliage 48 a donc une forme de cylindre à section circulaire complet autour de l'axe central. La troisième surface de pliage 48 est radialement alignée avec la première surface de pliage 40. Ce troisième tronçon axial est donc adapté pour saisir la signature S sur toute sa largeur entre sa partie centrale 24 et ses bords latéraux 26.The third axial portion 34 extends axially between the first axial section 30 and the second axial section 32. The third axial section 34 is provided with a third folding surface 48 all around the central axis XX. The third folding surface 48 thus has a cylindrical shape with a complete circular section around the central axis. The third folding surface 48 is radially aligned with the first folding surface 40. This third axial section is therefore adapted to grip the signature S over its entire width between its central portion 24 and its lateral edges 26.

Le troisième tronçon axial 34 est en outre muni de deux rainures 50, 52 faisant tout le tour.The third axial portion 34 is further provided with two grooves 50, 52 all around.

Comme ceci est illustré sur la figure 6, la plieuse 2 comporte également des décolleurs 58 qui s'engagent dans les rainures 50, 52 et qui sont adaptés pour guider la signature plié et pour l'enlever des rouleaux de pliage 8, 10.As this is illustrated on the figure 6 , the folder 2 also comprises strippers 58 which engage in the grooves 50, 52 and which are adapted to guide the folded signature and to remove it from the folding rollers 8, 10.

Le quatrième tronçon 36 axial comporte une surface cylindrique à section circulaire centrée sur l'axe X-X. Le deuxième tronçon axial 32 est disposé axialement entre le quatrième tronçon axial 36 et le premier tronçon axial 30 ou le troisième tronçon axial 34.The fourth axial portion 36 has a cylindrical surface with a circular section centered on the X-X axis. The second axial section 32 is arranged axially between the fourth axial section 36 and the first axial section 30 or the third axial section 34.

Le rouleau de pliage 8 comporte en outre deux tourillons 60 disposés de chaque côté du rouleau.The folding roll 8 further comprises two journals 60 disposed on each side of the roll.

La plieuse 2 fonctionne de la manière suivante.Folder 2 operates in the following manner.

Les signatures S sont transportées par les cordons d'acheminement 12 jusqu'à la butée 18.The signatures S are transported by the routing cords 12 to the stop 18.

Lorsque la signature S atteint sa position de butée, la lame de pliage 6 pousse la partie centrale 24 à travers la fente de pliage 14 et la partie centrale 24 est saisie par la première surface de pliage 40 ainsi que par la troisième surface de pliage 48. De plus, la portion de la partie centrale 24 qui chevauche le deuxième tronçon axial 32, ainsi que la partie du bord avant 20 adjacente à la partie centrale sont saisis dans un premier temps, par la deuxième surface de pliage 46When the signature S reaches its stop position, the folding blade 6 pushes the central portion 24 through the folding slot 14 and the central portion 24 is grasped by the first folding surface 40 as well as by the third folding surface 48 In addition, the portion of the central portion 24 which overlaps the second axial portion 32, as well as the portion of the front edge 20 adjacent to the central portion, are first grasped by the second folding surface 46.

Ensuite, la signature S est acheminée à travers l'interstice de pliage 16 par la première, la deuxième et la troisième surfaces de pliage jusqu'à ce que le dégagement principal 44 libère la partie du bord avant 20 de la signature à un emplacement à distance du pli formé dans la partie centrale 24. Simultanément, la première surface de pliage 40 ainsi que la troisième surface de pliage 48 poursuivent l'entraînement de la signature à travers l'interstice 16.Then, the signature S is routed through the folding gap 16 through the first, second and third folding surfaces until the main clearance 44 releases the leading edge portion 20 of the signature at a location at distance of the fold formed in the central portion 24. Simultaneously, the first folding surface 40 as well as the third folding surface 48 continue the drive of the signature through the gap 16.

Lors de la poursuite de la rotation des rouleaux de pliage 8,10, les bords latéraux 26 de la signature S sont libérés au niveau du premier tronçon axial 30 par le dégagement auxiliaire 42. Ceci évite le pliage intempestif des bords latéraux, au niveau du bord arrière 22.When continuing the rotation of the folding rollers 8, 10, the lateral edges 26 of the signature S are released at the level of the first axial section 30 by the auxiliary clearance 42. This avoids the inadvertent folding of the lateral edges, at the level of the rear edge 22.

Etant donné que les rouleaux de pliage selon l'invention libèrent une grande partie du bord avant 20, ils permettent d'éviter des plissures au niveau du bord avant 20 à l'emplacement de la partie centrale 24, et ceci même à des vitesses de pliage élevées.Since the folding rollers according to the invention release a large part of the front edge 20, they make it possible to avoid creases at the front edge 20 at the location of the central part 24, and this even at high folding.

Claims (12)

  1. Folding roller (8, 10) for a device for folding a flat product to be folded, the roller extending along a centre axis (X-X) and comprising:
    - a first axial portion (30), and
    - a second axial portion (32),
    the first axial portion having a first surface (40) for folding the product to be folded, wherein the second axial portion (32) comprises a main relief (44) which is radially recessed relative to the first folding surface (40), wherein the second axial portion (32) comprises a second surface (46) for folding the product to be folded and wherein the main relief (44) is radially recessed relative to the second folding surface (46),
    characterised in that the main relief (44) extends over an angular range greater than 270°, in particular greater than one of the ranges 300°, 310° and 320°, and in that this angular range is a maximum of 325°, around the centre axis.
  2. Folding roller according to claim 1, characterised in that the first folding surface (40) and the second folding surface (46) are radially aligned.
  3. Folding roller according to either claim 1 or claim 2, characterised in that the first axial portion (30) comprises an auxiliary relief (42) which is radially recessed relative to the first folding surface (40), and in that the auxiliary relief (42) and the main relief (44) extend over different angular ranges around the centre axis (X-X).
  4. Folding roller according to claim 3, characterised in that the auxiliary relief (42) extends over an angular range of between 120° and 160°, and preferably between 140° and 150°, around the centre axis (X-X).
  5. Folding roller according to any one of claims 3 or 4, characterised in that the first folding surface (40) and the auxiliary relief (42) form a first connection edge (A), in that the second folding surface (46) and the main relief (44) form a second connection edge (B) and in that the first connection edge (A) and the second connection edge (B) are circumferentially aligned.
  6. Folding roller according to any one of the preceding claims, characterised in that the roller comprises a third axial portion (34) which has a third folding surface (48) which extends all the way around the centre axis and which is centred on the centre axis (X-X) and which is radially aligned with the first folding surface (40), the third axial portion (34) extending axially between the first axial portion (30) and the second axial portion (32).
  7. Folding roller according to any one of the preceding claims, characterised in that the roller comprises a fourth axial portion (36) which defines a cylindrical surface which extends all the way around and which is centred on the centre axis (X-X), and which is radially aligned with the first folding surface (40), and in that the second axial portion (32) is arranged axially between the first axial portion (30) and the fourth axial portion (36).
  8. Folding roller according to any one of the preceding claims, characterised in that the roller comprises at least one groove (50, 52) which extends all the way around and which extends axially between the first axial portion and the second axial portion.
  9. Folding device, of the type comprising:
    - a folding plate (6);
    - two folding rollers (8, 10) which together define a folding gap (16),
    characterised in that at least one of the folding rollers is a folding roller according to any one of the preceding claims.
  10. Folding device according to claim 9, characterised in that the folding device defines a conveying direction (E) for products (S) to be folded, and in that the second axial portion (32) is arranged downstream of the first axial portion (30) in the conveying direction.
  11. Folding device according to claim 9 or claim 10, characterised in that the two folding rollers are capable of being driven in such a manner that their second folding surface (46) is capable of overlapping a central portion (24) of a product to be folded at the location of a front edge of this product, and in that the main relief (44) is capable of overlapping a lateral portion of the front edge (20) of the product (S) to be folded when the product to be folded is gripped by the two rollers (8, 10).
  12. Folding device according to any one of claims 9 to 11, characterised in that the folding device comprises a stop (18) which is capable of stopping the product (S) to be folded, and in that the stop is axially aligned with the main relief (44).
EP08164704A 2007-09-24 2008-09-19 Folding roller and folding device Active EP2039639B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0757793A FR2921353B1 (en) 2007-09-24 2007-09-24 FOLDING ROLL AND CORRESPONDING BENDER

Publications (2)

Publication Number Publication Date
EP2039639A1 EP2039639A1 (en) 2009-03-25
EP2039639B1 true EP2039639B1 (en) 2012-05-16

Family

ID=39434348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08164704A Active EP2039639B1 (en) 2007-09-24 2008-09-19 Folding roller and folding device

Country Status (5)

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US (1) US7914433B2 (en)
EP (1) EP2039639B1 (en)
JP (1) JP5415048B2 (en)
CN (1) CN101397106B (en)
FR (1) FR2921353B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009020645B3 (en) * 2009-05-06 2010-07-01 Maschinenbau Oppenweiler Binder Gmbh & Co. Kg Method for correcting preset gap width between two folding rollers of folding roller pair in bag folding machine, involves reading gap correction value from temperature gap correction value characteristics, and correcting gap width
CN103982526A (en) * 2014-04-24 2014-08-13 华国洋 Connection shaft used for folding roller
CN104441771A (en) * 2014-10-29 2015-03-25 苏州仁捷瑞自动化科技有限公司 Medium pressing type paper folder
CN104875427B (en) * 2015-05-22 2017-06-30 深圳市索登科技有限公司 Continuous impression device, continuous marking press and continuous creasing method
JP6647887B2 (en) * 2016-01-29 2020-02-14 三菱重工機械システム株式会社 Folding roller and folding machine

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Also Published As

Publication number Publication date
JP2009073670A (en) 2009-04-09
FR2921353A1 (en) 2009-03-27
JP5415048B2 (en) 2014-02-12
US20090247381A1 (en) 2009-10-01
CN101397106A (en) 2009-04-01
EP2039639A1 (en) 2009-03-25
US7914433B2 (en) 2011-03-29
CN101397106B (en) 2012-11-28
FR2921353B1 (en) 2010-06-18

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