EP0741097B1 - Device for finishing the fold of signatures - Google Patents

Device for finishing the fold of signatures Download PDF

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Publication number
EP0741097B1
EP0741097B1 EP96107126A EP96107126A EP0741097B1 EP 0741097 B1 EP0741097 B1 EP 0741097B1 EP 96107126 A EP96107126 A EP 96107126A EP 96107126 A EP96107126 A EP 96107126A EP 0741097 B1 EP0741097 B1 EP 0741097B1
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EP
European Patent Office
Prior art keywords
rollers
pair
booklet
roller
passage slot
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.)
Expired - Lifetime
Application number
EP96107126A
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German (de)
French (fr)
Other versions
EP0741097B9 (en
EP0741097A3 (en
EP0741097A2 (en
Inventor
Michel Petitjean
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C P Bourg SA
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C P Bourg SA
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Publication date
Application filed by C P Bourg SA filed Critical C P Bourg SA
Priority to DE1996107126 priority Critical patent/DE741097T1/en
Publication of EP0741097A2 publication Critical patent/EP0741097A2/en
Publication of EP0741097A3 publication Critical patent/EP0741097A3/en
Application granted granted Critical
Publication of EP0741097B1 publication Critical patent/EP0741097B1/en
Publication of EP0741097B9 publication Critical patent/EP0741097B9/en
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Expired - Lifetime legal-status Critical Current

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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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/12—Delivering or advancing articles from machines; Advancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/26—Particular arrangement of belt, or belts
    • B65H2404/261—Arrangement of belts, or belt(s) / roller(s) facing each other for forming a transport nip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/18—Form of handled article or web
    • B65H2701/182—Piled package
    • B65H2701/18271—Piled package of folded sheet material

Definitions

  • the present invention relates to a fold finishing device booklets made up of sheets stacked and folded along a line central (see, for example, DE-A-2 640 411 or US-A-5 125 330).
  • Such booklets can be made by stacking sheets, stapling along a central line and folding along this same central line.
  • the folding is carried out by introduction, to using a blade, a bundle of leaves in the defined slot between two opposite rollers which rotate so as to evacuate the folded booklet.
  • the booklet has a tendency to reopen, mainly due to the elasticity of paper fibers. This tendency of the booklet to reopen is troublesome for later stages such as trimming and above all stacking booklets for packaging.
  • the booklet is passed between one or more pairs of rollers, in order to compress or crush the fold. In this way, we manage to reduce, but not eliminate, the tendency of the booklet to reopen.
  • the present invention provides a device for finishing the fold of booklets which is capable of eliminating virtually any trend from the booklet to reopen.
  • This device comprises at least one pair of parallel rollers and opposites defining between them a passage slot for a booklet, at at least one of said rollers being rotated and the rollers being biased towards each other; in accordance with the invention, the normal on the plane defined by the axes of said pair of rollers is tilted relative to the direction progress of the booklets, and an element of deflection of the booklet is arranged upstream of said passage slot to deviate so forced the path of the booklet towards said passage slot at from said direction of advancement.
  • the forced deflection of the bundle of leaves has the effect of bending and exerting an effort on the paper fibers on the convex side of the bundle curved.
  • the pair of rollers is preferably preceded by another pair of rollers parallel and opposite defining between them a passage slot of a booklet, at least one of said rollers being rotated and the rollers being biased towards each other, the plane defined by the axes of said pair of rollers being normal to the direction progress of the booklets. Spacing between pairs of rollers is such that a booklet engaged in the slot for the passage of the rollers downstream is still engaged in the roller passage slot upstream.
  • the upstream rollers oppose traction, due to the curvature of the bundle, exerted by the downstream rollers on the sheets of paper when the fold is engaged between them.
  • the biasing force towards each other downstream rollers is preferably significantly larger than that of upstream rollers when the booklet is engaged in the slot passage of the downstream rollers.
  • common means of solicitation are provided for the two pairs of rollers, the action of which is selectively applied to one or more the other of these.
  • These means advantageously consist of two elements for transmitting a bearing force on the axis of one of the rolls of each pair, respectively, the bearing force being applied directly to that of the transmission elements which is associated with the upstream rollers and indirectly, by contact between these transmission elements, to that of the transmission elements which is associated with the downstream rollers.
  • the transmission elements consist of pivoting levers having free ends in abutment against one another and intermediate parts bearing on the axis of the associated roller.
  • the booklet fold finisher has two pairs rollers 10, 12, mounted in a frame not shown, in succession along a path of passage of a bundle 14 of folded sheets according to a central line.
  • the lower rollers 10b, 12b are each rotatably mounted about a fixed axis and rotated by a motor 16, via a belt 18.
  • a belt endless 20 is dragged around the rollers 10b, 12b and around a tension roller 22.
  • the upper rollers 10a, 12a are mounted at free rotation and vertical movement; they are solicited towards the lower rollers 10b, 12b and in contact with the belt 20 by an associated spring 24, 26, respectively.
  • Rolls; Coils upper 10a, 12a are rotated indirectly by friction contact with the belt 20, but their rotation is synchronized by a timing belt 28.
  • upper roller 12a is offset from to the lower roller 12b in the direction of the first pair 10 of rollers; normal to the plane defined by the axes of the rollers 12a, 12b is therefore inclined relative to the direction of advancement of the bundle 14.
  • the belt 20 undergoes a deflection on contact with roller 12a.
  • the folded bundle 14 is placed on the belt 20 in front of the first pair 10 of rollers, the fold forming the edge before the bundle.
  • roller 10a is lifted up against the force of the spring 24 and pressure is exerted on the fold of the bundle.
  • the bundle 14 passes in the area where the belt 20 is deflected by the roller 12a. Pressure is then exerted by the strap 20 on the back of the fold of bundle 14, as indicated by a arrow in figure 2.
  • the bundle is deformed along the path of the belt 20, with a convex curvature on the side of the belt and a concave curvature on the side of the roller 12a. By this curvature, the paper fibers are exposed to a tensile force on the side of the belt 20.
  • the deflection of the bundle causes shear forces in the fold area. The combined action of these stresses causes most of the paper fibers to break in the fold area of the bundle 14. As a result, the booklet leaving the device no longer has a tendency to reopen.
  • the spacing between the pairs of rollers 10, 12 is preferably small enough that the bundle 14, when its fold is engaged between the belt 20 and the roller 12a, is still engaged in the passage slot between the belt 20 and the roller 10a.
  • the bundle 14 takes a curved shape due to its deflection in contact with the roller 12a, it tends to advance more quickly on the convex side of the curvature.
  • this rear part of the bundle cannot follow the progress anymore fast on the convex side of the curvature, and the traction exerted on the paper fibers is therefore increased. To ensure this effect, it is important that the drive of the rollers 10b and 12b is synchronous.
  • the belt 20 is replaced by a guide plate 30.
  • the rollers 10a, 10b and 12a, 12b are all coupled as shown schematically in Figure 3, a drive motor 16, by via a transmission chain 32.
  • the rollers lower 10b, 12b have their axes mounted in an adjustable manner height in an eccentric support 34 and 36, respectively. The rotation of these eccentric supports 34, 36 is controlled manually by a steering wheel not shown, to modify the spacing rolls depending on the thickness of the booklets.
  • the rollers 10a, 12a are mounted to travel in arms pivoting 38, 40, respectively.
  • the stress of the rollers 10a, 12a to the rollers 10b, 12b is provided by a common mechanism whose action is selectively applied to the roller 10a and then with roller 12a. More particularly, a pivoting lever 42 is in support on the axis of the roller 10a, and a similar pivoting lever 44 is resting on the axis of the roller 12a.
  • the free ends of the levers 42, 44 are superimposed and have bores aligned through which pass a pull rod 46.
  • the pull rod 46 carries a pack of spring disks 48 which rests on one side on a support element 50 and, on the other side, on a bolt 52 screwed on the free end of the draw rod 46.
  • the pack of discs spring 48 therefore exerts a tensile force on rod 46, the head rests on the free end of the lever 42 which, in turn, pushes on the free end of lever 44.
  • the biasing force rollers 10a, 12a depends on the ratio between the length of the lever 42 or 44 and the distance between the pivot point of each lever and its support zone on the axis of the respective roller. We can vary this ratio to get different stress forces for the pairs of rollers 10, 12, despite the use of a common mechanism.
  • the guide plate 30 forces the bundle on a curved path to break the paper fibers in the fold area.

Description

La présente invention concerne un dispositif de finition du pli de livrets composés de feuilles empilées et pliées suivant une ligne centrale (voir, par exemple, DE-A-2 640 411 ou US-A-5 125 330).The present invention relates to a fold finishing device booklets made up of sheets stacked and folded along a line central (see, for example, DE-A-2 640 411 or US-A-5 125 330).

Des livrets de ce genre peuvent être réalisés par empilage de feuilles, agrafage suivant une ligne centrale et pliage le long de cette même ligne centrale. Le pliage est effectué par introduction, à l'aide d'une lame, de la liasse de feuilles dans la fente définie entre deux rouleaux opposés qui tournent de manière à évacuer le livret plié.Such booklets can be made by stacking sheets, stapling along a central line and folding along this same central line. The folding is carried out by introduction, to using a blade, a bundle of leaves in the defined slot between two opposite rollers which rotate so as to evacuate the folded booklet.

Cependant, à la sortie de ces rouleaux de pliage, le livret a une tendance à se rouvrir, essentiellement à cause de l'élasticité des fibres du papier. Cette tendance du livret à se rouvrir est gênante pour les étapes ultérieures telles que le massicotage et surtout l'empilage des livrets en vue de leur emballage. However, at the exit of these folding rollers, the booklet has a tendency to reopen, mainly due to the elasticity of paper fibers. This tendency of the booklet to reopen is troublesome for later stages such as trimming and above all stacking booklets for packaging.

Pour remédier à cet inconvénient, on fait passer le livret entre une ou plusieures paires de rouleaux, afin de comprimer ou écraser le pli. De la sorte, on parvient bien à réduire, mais non à éliminer, la tendance du livret à se rouvrir.To remedy this drawback, the booklet is passed between one or more pairs of rollers, in order to compress or crush the fold. In this way, we manage to reduce, but not eliminate, the tendency of the booklet to reopen.

La présente invention propose un dispositif de finition du pli de livrets qui est capable d'éliminer pratiquement toute tendance du livret à se rouvrir.The present invention provides a device for finishing the fold of booklets which is capable of eliminating virtually any trend from the booklet to reopen.

Ce dispositif comporte au moins une paire de rouleaux parallèles et opposés définissant entre eux une fente de passage d'un livret, au moins l'un desdits rouleaux étant entraíné en rotation et les rouleaux étant sollicités l'un vers l'autre; conformément à l'invention, la normale sur le plan défini par les axes de ladite paire de rouleaux est inclinée par rapport à la direction d'avancement des livrets, et un élément de déflexion du livret est agencé en amont de ladite fente de passage pour dévier de manière forcée le trajet du livret en direction de ladite fente de passage à partir de ladite direction d'avancement. La déflexion forcée de la liasse de feuilles a pour effet de la courber et d'exercer un effort de traction sur les fibres de papier du côté convexe de la liasse courbée. En même temps, des efforts de cisaillement sont exercés sur le papier à l'endroit du pli, et la déflexion forcée de la liasse provoque une pression sur le dos du pli au contact avec les rouleaux. Par la conjugaison de ces effets, les fibres de papier sont rompues à l'endroit du pli, et la tendance du pli à se rouvrir est essentiellement éliminée.This device comprises at least one pair of parallel rollers and opposites defining between them a passage slot for a booklet, at at least one of said rollers being rotated and the rollers being biased towards each other; in accordance with the invention, the normal on the plane defined by the axes of said pair of rollers is tilted relative to the direction progress of the booklets, and an element of deflection of the booklet is arranged upstream of said passage slot to deviate so forced the path of the booklet towards said passage slot at from said direction of advancement. The forced deflection of the bundle of leaves has the effect of bending and exerting an effort on the paper fibers on the convex side of the bundle curved. At the same time, shear forces are exerted on the paper at the fold, and the forced deflection of the bundle causes pressure on the back of the fold in contact with the rollers. By the combination of these effects, the paper fibers are broken the location of the fold, and the tendency of the fold to reopen is essentially eliminated.

Pour augmenter la force de traction dans les fibres du papier et la proportion des fibres rompues dans la zone du pli, la paire de rouleaux est de préférence précédée d'une autre paire de rouleaux parallèles et opposés définissant entre eux une fente de passage d'un livret, au moins l'un desdits rouleaux étant entraíné en rotation et les rouleaux étant sollicités l'un vers l'autre, le plan défini par les axes de ladite paire de rouleaux étant normal à la direction d'avancement des livrets. L'espacement entre les paires de rouleaux est tel qu'un livret engagé dans la fente de passage des rouleaux aval se trouve encore engagé dans la fente de passage des rouleaux amont. Ainsi, les rouleaux amont s'opposent à la traction, dûe à la courbure de la liasse, exercée par les rouleaux aval sur les feuilles de papier lorsque le pli est engagé entre ceux-ci.To increase the tensile force in the paper fibers and the proportion of fibers broken in the crease area, the pair of rollers is preferably preceded by another pair of rollers parallel and opposite defining between them a passage slot of a booklet, at least one of said rollers being rotated and the rollers being biased towards each other, the plane defined by the axes of said pair of rollers being normal to the direction progress of the booklets. Spacing between pairs of rollers is such that a booklet engaged in the slot for the passage of the rollers downstream is still engaged in the roller passage slot upstream. Thus, the upstream rollers oppose traction, due to the curvature of the bundle, exerted by the downstream rollers on the sheets of paper when the fold is engaged between them.

Pour néanmoins limiter la force de traction exercée sur les feuilles de papier, la force de sollicitation l'un vers l'autre des rouleaux aval est de préférence nettement plus grande que celle des rouleaux amont au moment où le livret est engagé dans la fente de passage des rouleaux aval.To nevertheless limit the tensile force exerted on the sheets of paper, the biasing force towards each other downstream rollers is preferably significantly larger than that of upstream rollers when the booklet is engaged in the slot passage of the downstream rollers.

Suivant une forme de réalisation avantageuse de l'invention, des moyens communs de sollicitation sont prévus pour les deux paires de rouleaux, dont l'action est sélectivement appliquée à l'une ou l'autre de celles-ci. Ces moyens sont avantageusement constitués de deux éléments de transmission d'une force d'appui sur l'axe d'un des rouleaux de chaque paire, respectivement, la force d'appui étant appliquée directement à celui des éléments de transmission qui est associé aux rouleaux amont et indirectement, par contact entre ces éléments de transmission, à celui des éléments de transmission qui est associé aux rouleaux aval. Dans la forme de réalisation préférée, les éléments de transmission sont constitués de leviers pivotants ayant des extrémités libres en butée l'une contre l'autre et des parties intermédiaires en appui sur l'axe du rouleau associé.According to an advantageous embodiment of the invention, common means of solicitation are provided for the two pairs of rollers, the action of which is selectively applied to one or more the other of these. These means advantageously consist of two elements for transmitting a bearing force on the axis of one of the rolls of each pair, respectively, the bearing force being applied directly to that of the transmission elements which is associated with the upstream rollers and indirectly, by contact between these transmission elements, to that of the transmission elements which is associated with the downstream rollers. In the preferred embodiment, the transmission elements consist of pivoting levers having free ends in abutment against one another and intermediate parts bearing on the axis of the associated roller.

D'autres détails et particularités de l'invention ressortiront de la description ci-après de plusieurs formes de réalisation, en référence aux dessins dans lesquels:

  • la figure 1 est une vue schématique en élévation d'un dispositif de finition du pli de livrets;
  • la figure 2 est une vue partielle à plus grande échelle du dispositif; et
  • la figure 3 est une vue schématique d'une forme de réalisation préférée de l'invention.
    • Other details and particularities of the invention will emerge from the description below of several embodiments, with reference to the drawings in which:
  • Figure 1 is a schematic elevational view of a device for finishing the booklet fold;
  • Figure 2 is a partial view on a larger scale of the device; and
  • Figure 3 is a schematic view of a preferred embodiment of the invention.

    • Le dispositif de finition du pli de livrets comporte deux paires de rouleaux 10, 12, montés dans un bâti non-représenté, en succession selon un trajet de passage d'une liasse 14 de feuilles pliées suivant une ligne centrale. Les rouleaux inférieurs 10b, 12b sont chacun montés à rotation autour d'un axe fixe et entraínés en rotation par un moteur 16, par l'intermédiaire d'une courroie 18. Une courroie sans fin 20 est traínée autour des rouleaux 10b, 12b et autour d'un rouleau tendeur 22. Les rouleaux supérieurs 10a, 12a sont montés à rotation libre et à déplacement vertical; ils sont sollicités vers les rouleaux inférieurs 10b, 12b et en contact avec la courroie 20 par un ressort associé 24, 26, respectivement. Les rouleaux supérieurs 10a, 12a sont entraínés en rotation indirectement par contact à frottement avec la courroie 20, mais leur rotation est synchronisée par une courroie de synchronisation 28. Dans la deuxième paire 12 de rouleaux, le rouleau supérieur 12a est décalé par rapport au rouleau inférieur 12b en direction de la première paire 10 de rouleaux; la normale au plan défini par les axes des rouleaux 12a, 12b est donc inclinée par rapport à la direction d'avancement de la liasse 14. De ce fait, la courroie 20 subit une déflexion au contact avec le rouleau 12a. La liasse pliée 14 est déposée sur la courroie 20 devant la première paire 10 de rouleaux, le pli formant le bord avant de la liasse. Lorsqu'elle passe dans la fente formée entre le rouleau 10a et la courroie 20, le rouleau 10a est soulevé à l'encontre de la force du ressort 24 et une pression est exercée sur le pli de la liasse. Ensuite, comme il ressort plus clairement de la figure 2, la liasse 14 passe dans la zone où la courroie 20 est défléchie par le rouleau 12a. Une pression est alors exercée par la courroie 20 sur le dos du pli de la liasse 14, comme indiqué par une flèche à la figure 2. La liasse est déformée suivant le trajet de la courroie 20, avec une courbure convexe du côté de la courroie et une courbure concave du côté du rouleau 12a. Par cette courbure, les fibres du papier sont exposées à un effort de traction du côté de la courroie 20. En même temps, la déflexion de la liasse provoque des forces de cisaillement dans la zone du pli. L'action combinée de ces sollicitations fait rompre en grande partie les fibres du papier dans la zone du pli de la liasse 14. De ce fait, le livret sortant du dispositif ne présente plus une tendance à se rouvrir. The booklet fold finisher has two pairs rollers 10, 12, mounted in a frame not shown, in succession along a path of passage of a bundle 14 of folded sheets according to a central line. The lower rollers 10b, 12b are each rotatably mounted about a fixed axis and rotated by a motor 16, via a belt 18. A belt endless 20 is dragged around the rollers 10b, 12b and around a tension roller 22. The upper rollers 10a, 12a are mounted at free rotation and vertical movement; they are solicited towards the lower rollers 10b, 12b and in contact with the belt 20 by an associated spring 24, 26, respectively. Rolls; Coils upper 10a, 12a are rotated indirectly by friction contact with the belt 20, but their rotation is synchronized by a timing belt 28. In the second pair 12 of rollers, upper roller 12a is offset from to the lower roller 12b in the direction of the first pair 10 of rollers; normal to the plane defined by the axes of the rollers 12a, 12b is therefore inclined relative to the direction of advancement of the bundle 14. As a result, the belt 20 undergoes a deflection on contact with roller 12a. The folded bundle 14 is placed on the belt 20 in front of the first pair 10 of rollers, the fold forming the edge before the bundle. When it passes through the slot formed between the roller 10a and belt 20, roller 10a is lifted up against the force of the spring 24 and pressure is exerted on the fold of the bundle. Then, as is clear from the Figure 2, the bundle 14 passes in the area where the belt 20 is deflected by the roller 12a. Pressure is then exerted by the strap 20 on the back of the fold of bundle 14, as indicated by a arrow in figure 2. The bundle is deformed along the path of the belt 20, with a convex curvature on the side of the belt and a concave curvature on the side of the roller 12a. By this curvature, the paper fibers are exposed to a tensile force on the side of the belt 20. At the same time, the deflection of the bundle causes shear forces in the fold area. The combined action of these stresses causes most of the paper fibers to break in the fold area of the bundle 14. As a result, the booklet leaving the device no longer has a tendency to reopen.

    L'espacement entre les paires de rouleaux 10, 12 est de préférence suffisamment petit pour que la liasse 14, lorsque son pli est engagé entre la courroie 20 et le rouleau 12a, se trouve encore engagée dans la fente de passage entre la courroie 20 et le rouleau 10a. Lorsque la liasse 14 prend une forme courbe dûe à sa déflexion au contact avec le rouleau 12a, elle tend à avancer plus rapidement du côté convexe de la courbure. Toutefois, puisque la partie arrière de la liasse 14 reste engagée entre la courroie 20 et le rouleau 10a, cette partie arrière de la liasse ne peut suivre l'avancement plus rapide du côté convexe de la courbure, et la traction exercée sur les fibres du papier est donc augmentée. Pour assurer cet effet, il est important que l'entraínement des rouleaux 10b et 12b soit synchrone.The spacing between the pairs of rollers 10, 12 is preferably small enough that the bundle 14, when its fold is engaged between the belt 20 and the roller 12a, is still engaged in the passage slot between the belt 20 and the roller 10a. When the bundle 14 takes a curved shape due to its deflection in contact with the roller 12a, it tends to advance more quickly on the convex side of the curvature. However, since the rear part bundle 14 remains engaged between the belt 20 and the roller 10a, this rear part of the bundle cannot follow the progress anymore fast on the convex side of the curvature, and the traction exerted on the paper fibers is therefore increased. To ensure this effect, it is important that the drive of the rollers 10b and 12b is synchronous.

    Dans la forme de réalisation préférée illustrée à la figure 3, la courroie 20 est remplacée par une tôle de guidage 30. Les rouleaux 10a, 10b et 12a, 12b sont tous accouplés comme représenté schématiquement à la figure 3, à un moteur d'entraínement 16, par l'intermédiaire d'une chaíne de transmission 32. Les rouleaux inférieurs 10b, 12b ont leurs axes montés de façon ajustable en hauteur dans un support excentrique 34 et 36, respectivement. La rotation de ces supports excentriques 34, 36 est commandée manuellement par un volant non-représenté, pour modifier l'écartement des rouleaux en fonction de l'épaisseur des livrets.In the preferred embodiment illustrated in Figure 3, the belt 20 is replaced by a guide plate 30. The rollers 10a, 10b and 12a, 12b are all coupled as shown schematically in Figure 3, a drive motor 16, by via a transmission chain 32. The rollers lower 10b, 12b have their axes mounted in an adjustable manner height in an eccentric support 34 and 36, respectively. The rotation of these eccentric supports 34, 36 is controlled manually by a steering wheel not shown, to modify the spacing rolls depending on the thickness of the booklets.

    Les rouleaux 10a, 12a sont montés à débattement dans des bras pivotants 38, 40, respectivement. La sollicitation des rouleaux 10a, 12a vers les rouleaux 10b, 12b est assurée par un mécanisme commun dont l'action est sélectivement appliquée au rouleau 10a et ensuite au rouleau 12a. Plus particulièrement, un levier pivotant 42 est en appui sur l'axe du rouleau 10a, et un levier pivotant analogue 44 est en appui sur l'axe du rouleau 12a. Les extrémités libres des leviers 42, 44 sont superposées et présentent des alésages alignés à travers lesquels passe une tige de traction 46. La tige de traction 46 porte un paquet de disques à ressort 48 qui s'appuie d'un côté sur un élément d'appui 50 et, de l'autre côté, sur un boulon 52 vissé sur l'extrémité libre de la tige de traction 46. Le paquet de disques à ressort 48 exerce donc une force de traction sur la tige 46, dont la tête appuye sur l'extrémité libre du levier 42 qui, à son tour, pousse sur l'extrémité libre du levier 44. La force de sollicitation des rouleaux 10a, 12a dépend du rapport entre la longueur du levier 42 ou 44 et la distance entre le point de pivotement de chaque levier et de sa zone d'appui sur l'axe du rouleau respectif. On peut varier ce rapport pour obtenir des forces de sollicitation différentes pour les paires de rouleaux 10, 12, malgré l'emploi d'un mécanisme commun.The rollers 10a, 12a are mounted to travel in arms pivoting 38, 40, respectively. The stress of the rollers 10a, 12a to the rollers 10b, 12b is provided by a common mechanism whose action is selectively applied to the roller 10a and then with roller 12a. More particularly, a pivoting lever 42 is in support on the axis of the roller 10a, and a similar pivoting lever 44 is resting on the axis of the roller 12a. The free ends of the levers 42, 44 are superimposed and have bores aligned through which pass a pull rod 46. The pull rod 46 carries a pack of spring disks 48 which rests on one side on a support element 50 and, on the other side, on a bolt 52 screwed on the free end of the draw rod 46. The pack of discs spring 48 therefore exerts a tensile force on rod 46, the head rests on the free end of the lever 42 which, in turn, pushes on the free end of lever 44. The biasing force rollers 10a, 12a depends on the ratio between the length of the lever 42 or 44 and the distance between the pivot point of each lever and its support zone on the axis of the respective roller. We can vary this ratio to get different stress forces for the pairs of rollers 10, 12, despite the use of a common mechanism.

    Lorsqu'une liasse entre dans la fente de passage formée entre les rouleaux 10a, 10b, le rouleau 10a est soulevé, et l'extrémité libre du levier 42 s'écarte de celle du levier 44. La force de traction exercée par la tige 46 est donc transmise sur l'axe du seul rouleau 10a, et le rouleau 12a est sollicité vers le rouleau 12b par simple gravitation. Lorsque la liasse passe ensuite dans la fente formée entre les rouleaux 12a, 12b, le rouleau 12a est soulevé, et le levier 44 est également soulevé. Puisque l'extrémité libre du levier 42 est en butée sur celle du levier 44, les deux leviers sont soulevés en même temps, à l'encontre de la force exercée à travers la tige 46. Puisque le levier 42 est soulevé par le levier 44, il n'appuye plus sur l'axe du rouleau 10a, et ce dernier n'est donc plus sollicité vers le rouleau 10b que par l'effet de gravité.When a bundle enters the passage slot formed between the rollers 10a, 10b, the roller 10a is raised, and the free end of lever 42 deviates from that of lever 44. The pulling force exerted by the rod 46 is therefore transmitted on the axis of the single roller 10a, and the roller 12a is biased towards the roller 12b by simple gravitation. When the bundle then passes through the formed slit between the rollers 12a, 12b, the roller 12a is raised, and the lever 44 is also raised. Since the free end of the lever 42 is in abutment on that of the lever 44, the two levers are raised in at the same time, against the force exerted through the rod 46. Since the lever 42 is lifted by the lever 44, it no longer presses on the axis of the roller 10a, and the latter is therefore no longer stressed towards the roller 10b only by the effect of gravity.

    Comme la courroie 20 dans la forme de réalisation précédente, la tôle de guidage 30 force la liasse sur un trajet courbe pour rompre les fibres du papier dans la zone du pli.Like the belt 20 in the previous embodiment, the guide plate 30 forces the bundle on a curved path to break the paper fibers in the fold area.

    Claims (12)

    1. A device for finishing the folding of booklets made up of a stacked sheets folded along a central line, the device comprising at least one pair (12) of parallel opposed rollers which between them define a slot through which a booklet can pass, at least one (12b) of the said rollers being driven in rotation and the rollers (12a, 12b) being pressed towards one another, characterised in that the normal to the plane defined by the axes of the said pair (12) of rollers is inclined relative to the direction of advance of the booklets and in that an element (20) for deflecting a booklet is disposed upstream of the said passage slot so as to forcibly deflect the path of the booklet towards the said passage slot, starting from the said direction of advance.
    2. A device according to claim 1, characterised in that the pair (12) of rollers is preceded by another pair (10) of parallel opposed rollers which between them define a slot through which a booklet can pass, at least one (10b) of the said rollers being driven in rotation and the rollers (10a, 10b) being pressed towards one another, the plane defined by the axes of the said other pair (10) of rollers being normal to the direction of advance of the booklets.
    3. A device according to claim 2, characterised in that the spacing between the pairs (10, 12) of rollers is such that when a booklet engages in the passage slot between the downstream rollers (12a, 12b) it is still engaged in the passage slot between the upstream rollers (10a, 10b).
    4. A device according to claim 3, characterised in that the force pressing together the downstream rollers (12a, 12b) is appreciably greater than the force on the upstream rollers (10a, 10b) at the moment when the booklet engages in the passage slot between the downstream rollers.
    5. A device according to claim 4, characterised in that common pressing means (46, 48) are provided for the two pairs (10, 12) of rollers, their action being selectively applied to one or other pair.
    6. A device according to claim 5, characterised in that the said pressing means comprise two elements (42, 44) for transmitting a bearing force to the shaft of one (10a, 12a) roller in each respective pair, the bearing force being applied directly to that one (42) of the transmission elements which is associated with the upstream rollers (10a, 10b) and indirectly, by contact between said transmission elements (42, 44), to that one (44) of the transmission elements which is associated with the downstream rollers (12a, 12b).
    7. A device according to claim 6, characterised in that the transmission elements comprise two pivoting levers (42, 44) having their free ends abutting one another and intermediate parts bearing on the shaft of the associated roller.
    8. A device according to claim 7, characterised in that the bearing force is applied to the levers (42, 44) via a tension rod (46) which extends through aligned openings in the free ends of the levers.
    9. A device according to any of claims 2 to 8, characterised in that the said deflecting element is a metal guide plate (30) which extends between the pairs (10, 12) of rollers to near the passage slot between the downstream rollers (12a, 12b).
    10. A device according to any of claims 2 to 9, characterised in that the said deflecting element is an endless belt (20) fitting around one (10b, 12b) roller of each pair.
    11. A device according to any of claims 2 to 10, characterised in that at least one roller of each pair (10, 12) is positively driven in rotation, the rollers being driven in synchronism.
    12. A device according to any of claims 2 to 11, characterised in that the bottom rollers (10b, 12b) have their shafts mounted in vertically adjustable manner in an eccentric holder (34, 36) in order to vary the spacing between the rollers in dependence on the thickness of the booklets.
    EP96107126A 1995-05-04 1996-05-06 Device for finishing the fold of signatures Expired - Lifetime EP0741097B9 (en)

    Priority Applications (1)

    Application Number Priority Date Filing Date Title
    DE1996107126 DE741097T1 (en) 1995-05-04 1996-05-06 Device for finishing the fold of signatures

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE29507466U DE29507466U1 (en) 1995-05-04 1995-05-04 Device for post-processing a folded stack of sheets of paper
    DE29507466U 1995-05-04

    Publications (4)

    Publication Number Publication Date
    EP0741097A2 EP0741097A2 (en) 1996-11-06
    EP0741097A3 EP0741097A3 (en) 1997-03-05
    EP0741097B1 true EP0741097B1 (en) 2001-12-19
    EP0741097B9 EP0741097B9 (en) 2002-10-02

    Family

    ID=8007641

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96107126A Expired - Lifetime EP0741097B9 (en) 1995-05-04 1996-05-06 Device for finishing the fold of signatures

    Country Status (2)

    Country Link
    EP (1) EP0741097B9 (en)
    DE (2) DE29507466U1 (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102007026245B3 (en) * 2007-06-04 2008-08-21 Siemens Ag Flat item e.g. post card, transportation device for use in sorting system, has pulleys and roller connected to retainer, where device is designed such that movement of band produces torque, which rotate retainer on counter conveying unit

    Families Citing this family (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    GB0005333D0 (en) 2000-03-07 2000-04-26 Watkiss Automation Ltd Methods of and apparatus for producing booklets
    GB2401820B (en) 2003-05-21 2007-01-17 Watkiss Automation Ltd Booklet production
    DE10348900B4 (en) 2003-10-16 2006-03-09 Palamides Gmbh Apparatus for pressing flat printed products
    DE102014007446A1 (en) 2014-05-21 2015-11-26 Heidelberger Druckmaschinen Ag Pocket folding machine with integrated belt press

    Family Cites Families (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE7136932U (en) * 1971-12-16 Maschinenbau Oppenweiler Binder & Co Pressing device for pressing folded sheets
    DE2640411A1 (en) * 1976-09-08 1978-03-16 Stahl Gmbh & Co Maschf Spring loaded pressure roller pair - producing sharp fold line on paper sheets after hand wheel on bearing levers applies hold-down force
    EP0417621B1 (en) * 1989-09-13 1993-09-08 Ferag AG Method and means for pressing folded printed products

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102007026245B3 (en) * 2007-06-04 2008-08-21 Siemens Ag Flat item e.g. post card, transportation device for use in sorting system, has pulleys and roller connected to retainer, where device is designed such that movement of band produces torque, which rotate retainer on counter conveying unit

    Also Published As

    Publication number Publication date
    EP0741097B9 (en) 2002-10-02
    EP0741097A3 (en) 1997-03-05
    DE69618066T2 (en) 2002-08-22
    DE69618066D1 (en) 2002-01-31
    DE29507466U1 (en) 1995-07-06
    EP0741097A2 (en) 1996-11-06

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