EP1518803B1 - Sheet positioning device in a feeding station of a treatment machine - Google Patents

Sheet positioning device in a feeding station of a treatment machine Download PDF

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Publication number
EP1518803B1
EP1518803B1 EP04405551A EP04405551A EP1518803B1 EP 1518803 B1 EP1518803 B1 EP 1518803B1 EP 04405551 A EP04405551 A EP 04405551A EP 04405551 A EP04405551 A EP 04405551A EP 1518803 B1 EP1518803 B1 EP 1518803B1
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EP
European Patent Office
Prior art keywords
sheet
sheets
lateral
transverse slide
positioning
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EP04405551A
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German (de)
French (fr)
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EP1518803A1 (en
Inventor
Marco Cardillo
Edmond Lambercy
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Bobst Mex SA
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Bobst SA
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    • 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
    • B65H9/10—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position
    • B65H9/103—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position acting by friction or suction on the article for pushing or pulling it into registered position, e.g. against a stop
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations

Definitions

  • the present invention relates to a sheet positioning device in an introduction station of a processing machine, comprising a margin table having means for driving said sheets, at least one front positioning stop to stop the edges. front of said sheets, means for detecting the lateral position of said sheets, means for comparing this position with a reference position, transverse drive means for said sheets and control means for actuating said drive means as a function of sense and the gap between the detected lateral position of said sheet and said reference position and to stop them when the position of this sheet corresponds to the reference position.
  • the sheets In positioning devices commonly used in paper, cardboard and corrugated cardboard processing machines, such as multi-station presses, the sheets must be positioned very precisely both longitudinally and longitudinally. only in the direction transversal to each of the stations they cross.
  • the leaves are fed regularly by a feeder to the margin table which drives the sheets in sheet, allows their gripping by the gripper bar and their introduction to the following stations.
  • the sheet is generally stamped on the margin table first against front stops then against lateral stops by means of feed members such as rollers or bands of resilient material descending bearing on the table.
  • feed members such as rollers or bands of resilient material descending bearing on the table.
  • the problem of the positioning of the sheets is also particularly difficult when the sheet has undergone various operations such as printing a creasing fold lines, cutting, because the following treatments must be performed very accurately with reference to the previous treatment.
  • various operations such as printing a creasing fold lines, cutting
  • the cutting of pre-printed elements does not allow any positioning error of the elements to obtain the desired quality of the finished product.
  • US 6,264,196 relates to a document in which when the sheet arrives against forward stops mounted on a cylinder, it is gripped by a gripper of a gripping device carried by a carriage which is held laterally by two springs antagonistic compression.
  • One of the springs is coaxial with a rod and is compressed between the end of the carriage and a shoulder of the rod.
  • the end of this rod carries a roller pressed against a profile of a cam, located between two rest sectors 41, 42.
  • the gripping device When the sheet comes against the front stops, it is grasped by the gripping device and the roller of the rod is in the rest area of the cam.
  • the cylinder by turning brings the roller into a portion of the cam which causes a lateral displacement of the carriage and therefore the sheet.
  • a brake is actuated and stops the carriage.
  • the rest of the stem stroke is absorbed by the spring.
  • the position of a marker with a reference position is not compared to move the sheet in one direction and a distance corresponding to the difference between the detected lateral position of the lateral marker and the reference position. Indeed, no comparison is made and the initial position of the sheet is not detected.
  • the sheet is simply moved until its side edge reaches the desired position.
  • the displacement given by the cam is always the same and not a function of the measured error, which is unknown.
  • the carriage is simply stopped when the passage of the edge of the sheet is detected in front of a detector.
  • the front stops of are not fixed, but integral with the cylinder.
  • a positioning device without cleat comprising a movable tablet provided with means for temporarily fixing the sheet to be positioned, carrying on the one hand a longitudinal displacement from front to back and another part of the correction movements around three vertical pins each secured a carriage, a central carriage sliding in a longitudinal slide and two side carriages sliding in transverse slides.
  • the correction movements of this tablet are generated by three linear motors controlled by optoelectronic reading means.
  • the correction is carried out during the driving of the sheet by the movable tablet, so as to bring the front edge of the sheet into the clamps of a clip bar at a precise reference position, so that the fixing means temporary tablet can release the sheet and the tablet can be returned to the starting position to take another sheet.
  • This device saves the time necessary for the jogging of the sheets, which makes it possible to substantially increase the rate of the processing machine.
  • EP 1'151'833 relates to a device next to the preceding, wherein a pinch member leaves is connected to the movable tablet by at least one hinge comprising a plurality of levers forming a parallelogram deformable about an axis horizontal pivoting so as to attenuate the appearance of a horizontal force component generated by the opening levers of the temporary fixing clamps of an edge of the sheet on the tablet.
  • EP 1'308'406 a device for detecting the position of a side edge of a sheet in an insertion station. According to this device, a comparison is made between the detected position of one of the lateral edges of the sheet and the desired position, a correction signal is generated which generates an adjustment signal transmitted to a setting element to bring this lateral edge. in the desired position. Thus, one acts directly on the sheet that one moves according to the difference measured between the detected position and the desired position.
  • this document gives no indication of how to implement this principle.
  • the object of the present invention is to remedy, at least partially, the usual defects of conventional sheet-firing devices, without leading to a solution likely to considerably increase the cost of the processing machine to which the sheet-positioning device is associated.
  • the present invention relates to a device for positioning sheets in a station for introducing a processing machine according to claim 1.
  • the main advantage of this invention is to combine two positioning modes.
  • To position the front edge of the sheets it uses, as in conventional positioning devices, front tabs against which the sheet is driven by the margin table, since this mode of positioning the front edges of the sheets is safe, simple and has no noticeable defect.
  • These front cleats can be fixed or adjustable.
  • For lateral positioning a method is used which consists in controlling sheet drive means by optoelectronic means, thus avoiding any use of lateral stops and the disadvantages which result therefrom, particularly in the case of flexible sheets.
  • lateral positioning is performed, as in conventional positioning systems, once the leading edge of the sheet is aligned with the front tabs, the only movement to be printed on the sheet to position it laterally is rectilinear motion, which constitutes a considerable simplification, as well from the point of view of the mechanical design as the electronic control, compared to a mobile system along three vertical axes, as in the aforementioned devices.
  • Another important advantage of this invention is that the lateral positioning allows the leaves to move in both directions, whereas a mechanical positioning can only pull or push, which allows it to move the sheet only in one direction. meaning.
  • the device according to the invention can achieve this positioning on the basis of a reference mark. printed. This makes it possible to avoid a repercussion of the errors between the printing carried out on the printed sheets in reel and their cut edges by cutting off the reel, using the printing as a reference and no longer the cut edge of the sheet and whose angle with the front edge of the sheet to be positioned may vary a few degrees from the perpendicular.
  • the positioning process is explained using the figures 1 and 8 .
  • the sheet 1 to be positioned is driven by a margin table T of a sheet processing machine, such as a cutting press, a printing machine, in which the sheet which has just undergone a printing or cutting operation must be accurately positioned for a subsequent operation, so as to ensure the same reference position of the sheet for the successive operations, so that the position of an impression or a cutting, for example, is not shifted with respect to the cutting or printing operation that preceded it.
  • a sheet processing machine such as a cutting press, a printing machine, in which the sheet which has just undergone a printing or cutting operation must be accurately positioned for a subsequent operation, so as to ensure the same reference position of the sheet for the successive operations, so that the position of an impression or a cutting, for example, is not shifted with respect to the cutting or printing operation that preceded it.
  • the sheet 1 is driven in the direction of the arrow F by the margin table T against a series of front cleats 2, whose position could be adjustable.
  • this function is preferably performed by at least one roller press member 3, controlled by a cam or a pneumatic cylinder (not shown), which presses the sheet 1 against a transverse slide 4, arranged between the table T margin and the front lugs 2.
  • This pressing member 3 could also be replaced by a gripping member, including a suction mouth formed on the transverse slide and connected to a suction source.
  • a photoelectric cell or a camera 5 serves to detect a lateral edge of the sheet 1 or, preferably, a mark whose position is characteristic of that of the printing or cutting of this sheet 1 and to compare its position. at a reference position.
  • This cell is connected to an input of a control station 6, an output of which is connected to an actuator, in particular a linear motor 7 for driving the transverse slide 4 as a function of the difference between the measured lateral position of the sheet and the reference position.
  • This control station 6 generates a supply current of a linear motor 7 according to the direction in which the linear motor 7 must move to bring the edge or the marker of the sheet 1 into the reference position.
  • the Figures 2 to 4 illustrate the device for positioning sheets in an introduction station of a processing machine.
  • This device comprises a transverse support 8 integral with the frame 9 of the processing machine which extends at both ends of the transverse support 8.
  • the latter comprises in its center a linear motor 7 including a magnet rail 10 having a profile of U-shape, is fixed by screws 11 to this transverse support 8.
  • a coil 12, disposed in the magnet rail 10 of the linear motor 7, is fixed to a mobile part 13 of this linear motor 7 by screws 16.
  • This coil 12 is connected to an output of the control station 6 ( figure 1 ).
  • the movable part 13, which acts as a transverse slide, is connected to the transverse support 8 by two carriages 14a, 14b arranged on either side of the linear motor 10, 12.
  • Each carriage 14a, 14b is engaged with two parallel guide rails 15a, 15b ( figure 3 ).
  • the upper surface of this transverse slide, formed by the movable portion 13, is secured to an aluminum profile 17 coated with a high friction material such as a polyurethane, or having a rough surface state.
  • the positioning device also comprises a transverse section 18 integral with two vertical slides 19a, 19b mounted in two vertical guides 20a, 20b integral with the frame 9.
  • the base of each vertical slide 19a, 19b is pressed by a spring 21a, 21b against a roller 22a, 22b pivoted at the end of an arm of a rocker 23a, 23b pivoted at its center on the frame 9.
  • a second roller, of which only the roller 24a is visible on the figure 4 is pivotally mounted at the other end of the arm of each rocker 23a, 23b.
  • Two pairs of pressure rollers 27a, 27b are pivoted freely about axes perpendicular to the transverse section 18, therefore parallel to the direction F of advance of the sheet 1 and integral with two supports 28a, respectively 28b.
  • Each support 28a, 28b comprises two adjustment members 29a, 29b, 30a, 30b for adjusting the height, respectively the lateral position of each support 28a, 28b.
  • Each turn of the control shaft 26 corresponds to an operating cycle of the positioning device in which the cams 25a, 25b rotate the latches 23a, 23b, causing the rollers 27a, 27b to descend against the aluminum profile 17 , thus pinching the sheet 1 between this profile 17 and the rollers 27a, 27b after it is brought in abutment against the front lugs 2.
  • the detection cell 5 measures the position of the lateral edge of the sheet 1 or a reference carried by this sheet and transmits the value and direction of the difference measured at the control station 6. This sends an electric current to the coil 12 of the linear motor to move the transverse slide 13, constituting the moving part of the motor linearly, in the desired direction until the position detected by the detection cell signals that the lateral position of the sheet 1 corresponds to the reference position.
  • This operation of lateral displacement of the sheet 1 by the linear motor is carried out in synchronism with the rotation of the control shaft 26, so that at the end of the correction, the cams 25a, 25b, integral with the control shaft 26, rotate the latches 23a, 23b in the opposite direction to that of the hands of the watch ( figure 4 ), lifting the slides 19a, 19b and the rollers 27a, 27b.
  • the sheet 1 is thus released and the cycle can start again with a following sheet 1.
  • the means used for the evacuation of the positioned sheet are constituted by a conventional clamp bar. This is not represented to the extent that it does not form part of the invention and is not necessary for its comprehension.
  • this variant comprises a transverse section 31 secured by its two ends to the frame 9.
  • Each pair of pressure rollers or pads 27a, 27b is then secured to the rod of a jack 32a, 32b, and two guide rods 33a, 33b, slidably mounted in the body of the jack 32a, 32b, so that these rollers or pads 27a, 27b are applied against the sheet 1 placed on the mobile part 13 of the linear motor at the time of its lateral positioning, by the cylinders 32a, 32b.
  • Such a variant constitutes a more advantageous solution than the embodiment illustrated by the figure 2 because less expensive.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Advancing Webs (AREA)

Abstract

The device has a feed board to drive a sheet against a front lay. A camera (5) measures the sheets side position. A motor (7) drives a cross slide based on difference between side and reference positions. A control station sends an electric current to a coil of the motor to move movable parts of the motor, in a desired direction until the measured position indicates that the side position corresponds to the reference position.

Description

La présente invention se rapporte à un dispositif de positionnement de feuilles dans une station d'introduction d'une machine de traitement, comprenant une table de marge présentant des moyens d'entraînement desdites feuilles, au moins une buté de positionnement frontal pour arrêter les bords avants desdites feuilles, des moyens de détection de la position latérale desdites feuilles, des moyens pour comparer cette position à une position de référence, des moyens d'entraînement transversaux desdites feuilles et des moyens de commande pour actionner ces moyens d'entraînement en fonction du sens et de l'écart entre la position latérale détectée de ladite feuille et ladite position de référence et pour les arrêter lorsque la position de cette feuille correspond à la position de référence.The present invention relates to a sheet positioning device in an introduction station of a processing machine, comprising a margin table having means for driving said sheets, at least one front positioning stop to stop the edges. front of said sheets, means for detecting the lateral position of said sheets, means for comparing this position with a reference position, transverse drive means for said sheets and control means for actuating said drive means as a function of sense and the gap between the detected lateral position of said sheet and said reference position and to stop them when the position of this sheet corresponds to the reference position.

Dans les dispositifs de positionnement couramment utilisés dans les machines de traitement de feuilles de papier, de carton compact, de carton ondulé, telles que les presses de façonnage à stations multiples, les feuilles doivent être positionnées de manière très précise aussi bien dans le sens longitudinal que dans le sens transversal à chacune des stations qu'elles traversent. A cet effet, les feuilles sont alimentée régulièrement par un margeur vers la table de marge qui entraîne les feuilles en nappe, permet leur prise par la barre de pinces et leur introduction vers les stations suivantes.In positioning devices commonly used in paper, cardboard and corrugated cardboard processing machines, such as multi-station presses, the sheets must be positioned very precisely both longitudinally and longitudinally. only in the direction transversal to each of the stations they cross. For this purpose, the leaves are fed regularly by a feeder to the margin table which drives the sheets in sheet, allows their gripping by the gripper bar and their introduction to the following stations.

La feuille est généralement taquée sur la table de marge tout d'abord contre des butées frontales puis contre des butées latérales au moyen d'organes d'avance tels que des galets ou des bandes de matériau élastique descendant en appui sur la table. Lors de l'utilisation de feuilles fines, il arrive fréquemment qu'une telle feuille se déforme en arrivant contre les taquets, pouvant créer ainsi une erreur de positionnement ainsi qu'un marquage de ses bords.The sheet is generally stamped on the margin table first against front stops then against lateral stops by means of feed members such as rollers or bands of resilient material descending bearing on the table. When using thin sheets, it frequently happens that such a sheet is deformed when arriving against the cleats, thus creating a positioning error and a marking of its edges.

Le problème du positionnement des feuilles est aussi particulièrement délicat lorsque la feuille a subi diverses opérations telles qu'une impression un refoulage de lignes de pliage, un découpage, car les traitements suivants doivent être effectués très exactement en référence au traitement précédent. Malgré toutes les précautions prises, il se produit des erreurs ou des dérives de la position de la partie traitée par rapport au bord frontal et latéral de la feuille provenant, par exemple, des taquages successifs réalisés en des lieux différents d'un bord de la feuille qui ne sont pas exactement rectilignes, ou de taquages se faisant systématiquement aux mêmes endroits en y laissant des marques. Or, la découpe d'éléments pré-imprimés n'autorise aucune erreur de positionnement des éléments pour obtenir la qualité voulue du produit fini.The problem of the positioning of the sheets is also particularly difficult when the sheet has undergone various operations such as printing a creasing fold lines, cutting, because the following treatments must be performed very accurately with reference to the previous treatment. Despite all the precautions taken, there are errors or drifts in the position of the treated part with respect to the front and side edge of the sheet coming, for example, from successive taps made at different places from an edge of the sheet. leaves that are not exactly rectilinear, or tugs being systematically in the same places leaving marks. However, the cutting of pre-printed elements does not allow any positioning error of the elements to obtain the desired quality of the finished product.

Le US 6'264'196 se rapporte à un document dans lequel lorsque la feuille arrive contre des butées avants montées sur un cylindre, elle est saisie par une pince d'un dispositif de préhension porté par un chariot qui est tenu latéralement par deux ressorts de compression antagonistes. L'un des ressorts est coaxial à une tige et est comprimé entre l'extrémité du chariot et un épaulement de la tige. L'extrémité de cette tige porte un galet pressé contre un profil d'une came, située entre deux secteurs de repos 41, 42. Lorsque la feuille arrive contre les butées avants, elle est saisie par le dispositif de préhension et le galet de la tige se situe dans le secteur de repos de la came. Une fois que les pinces sont fermées, le cylindre en tournant amène le galet dans une partie du profil de came qui provoque un déplacement latéral du chariot et donc de la feuille. Lorsque le détecteur détecte le passage du bord de cette feuille, un frein est actionné et arrête le chariot. Le reste de la course de la tige est absorbé par le ressort.US 6,264,196 relates to a document in which when the sheet arrives against forward stops mounted on a cylinder, it is gripped by a gripper of a gripping device carried by a carriage which is held laterally by two springs antagonistic compression. One of the springs is coaxial with a rod and is compressed between the end of the carriage and a shoulder of the rod. The end of this rod carries a roller pressed against a profile of a cam, located between two rest sectors 41, 42. When the sheet comes against the front stops, it is grasped by the gripping device and the roller of the rod is in the rest area of the cam. Once the clamps are closed, the cylinder by turning brings the roller into a portion of the cam which causes a lateral displacement of the carriage and therefore the sheet. When the detector detects the passage of the edge of this sheet, a brake is actuated and stops the carriage. The rest of the stem stroke is absorbed by the spring.

On peut donc constater que dans ce document, on ne compare pas la position d'un repère avec une position de référence pour déplacer la feuille dans un sens et d'une distance correspondant à l'écart entre la position latérale détectée du repère latéral et la position de référence. En effet, aucune comparaison n'est effectuée et la position initiale de la feuille n'est pas détectée. On déplace simplement la feuille jusqu'à ce que son bord latéral arrive dans la position désirée. Le déplacement donné par la came est toujours le même et non pas fonction de l'erreur mesurée, celle-ci étant inconnue. On arrête simplement le chariot lorsque l'on détecte le passage du bord de la feuille devant un détecteur. Par ailleurs, les butées avants de ne sont pas fixes, mais solidaires du cylindre.It can thus be seen that in this document, the position of a marker with a reference position is not compared to move the sheet in one direction and a distance corresponding to the difference between the detected lateral position of the lateral marker and the reference position. Indeed, no comparison is made and the initial position of the sheet is not detected. The sheet is simply moved until its side edge reaches the desired position. The displacement given by the cam is always the same and not a function of the measured error, which is unknown. The carriage is simply stopped when the passage of the edge of the sheet is detected in front of a detector. Moreover, the front stops of are not fixed, but integral with the cylinder.

On a décrit dans le US 4'989'855 un dispositif de positionnement dans lequel les taquets sont motorisés de manière à pouvoir modifier leur position. Ce dispositif comporte des moyens de lecture pour détecter la position d'un repère porté par les feuilles à positionner, la comparer avec une position de référence et ajuster les taquets pour corriger la position de la feuille. Un tel dispositif fonctionne comme un dispositif classique et présente les mêmes risques, notamment en ce qui concerne le taquage latéral.We have described in the US 4,989,855 a positioning device in which the cleats are motorized so as to change their position. This device comprises reading means for detecting the position of a marker carried by the sheets to be positioned, comparing it with a reference position and adjusting the tabs to correct the position of the sheet. Such a device functions as a conventional device and has the same risks, especially with regard to lateral jogging.

On a proposé dans le EP 669'274 un dispositif de taquage dans lequel la feuille à positionner est mise en contact contre les taquets avants, puis est déplacée latéralement contre des taquets latéraux à l'aide d'une tirette et d'un taquet entre lesquels la feuille est pincée. Le déplacement de la feuille est stoppé par des taquets latéraux et la tirette termine sa course en glissant par rapport à l'élément plat. Un tel dispositif est plus spécialement destiné à des feuilles relativement rigides telles que des plaques de carton ondulé.It has been proposed in EP 669,274 a jogging device in which the sheet to be positioned is brought into contact against the front lugs, and is laterally displaced against side lugs by means of a pull tab and a cleat between which the sheet is pinched. The displacement of the sheet is stopped by side stops and the zipper ends its run by sliding relative to the element dish. Such a device is more specifically intended for relatively rigid sheets such as corrugated cardboard plates.

Un dispositif de positionnement sans taquet est décrit dans le EP 1'044'908, comprenant une tablette mobile munie de moyens de fixation temporaire de la feuille à positionner, effectuant d'une part un déplacement longitudinal d'avant en arrière et d'autre part des mouvement de correction autour de trois pivots verticaux solidaires chacun d'un chariot, un chariot central coulissant dans une glissière longitudinale et deux chariots latéraux coulissant dans des glissières transversales. Les mouvements de correction de cette tablette sont générés par trois moteurs linéaires commandés par des moyens de lecture optoélectroniques. La correction s'effectue pendant l'entraînement de la feuille par la tablette mobile, de manière à amener le bord avant de la feuille dans les pinces d'une barre de pinces en une position de référence précise, de sorte que les moyens de fixation temporaire de la tablette peuvent libérer la feuille et la tablette peut être ramenée en position de départ pour reprendre une autre feuille. Ce dispositif économise le temps nécessaire au taquage des feuilles, ce qui permet d'augmenter sensiblement la cadence de la machine de traitement.A positioning device without cleat is described in EP 1'044'908, comprising a movable tablet provided with means for temporarily fixing the sheet to be positioned, carrying on the one hand a longitudinal displacement from front to back and another part of the correction movements around three vertical pins each secured a carriage, a central carriage sliding in a longitudinal slide and two side carriages sliding in transverse slides. The correction movements of this tablet are generated by three linear motors controlled by optoelectronic reading means. The correction is carried out during the driving of the sheet by the movable tablet, so as to bring the front edge of the sheet into the clamps of a clip bar at a precise reference position, so that the fixing means temporary tablet can release the sheet and the tablet can be returned to the starting position to take another sheet. This device saves the time necessary for the jogging of the sheets, which makes it possible to substantially increase the rate of the processing machine.

Le EP 1'151'833, se rapporte à un dispositif voisin du précédent, dans lequel un organe de pincement de feuilles est relié à la tablette mobile par au moins une articulation comprenant une pluralité de leviers formant un parallélogramme déformable autour d'un axe de pivotement horizontal de manière à atténuer l'apparition d'une composante de force horizontale engendrée par les leviers d'ouverture des pinces de fixation temporaire d'un bord de la feuille sur la tablette.EP 1'151'833 relates to a device next to the preceding, wherein a pinch member leaves is connected to the movable tablet by at least one hinge comprising a plurality of levers forming a parallelogram deformable about an axis horizontal pivoting so as to attenuate the appearance of a horizontal force component generated by the opening levers of the temporary fixing clamps of an edge of the sheet on the tablet.

Les deux derniers dispositifs sont très performants aussi bien du point de vue de la précision du positionnement que de l'augmentation de la cadence des feuilles ainsi positionnées. La solution de positionnement en continu de la feuille en cours de son transport permet effectivement d'économiser le temps nécessaire au taquage classique. Toutefois, l'augmentation de productivité ainsi obtenue nécessite un investissement important. En effet, l'augmentation de coût entre un système de taquage classique et un dispositif de positionnement en continu tel que celui décrit dans les EP 1'044'908 et EP 1'151'833 est considérable et ne se justifie économiquement que sur certains types de machines.The last two devices are very efficient both from the point of view of the positioning accuracy and the increase in the rate of the sheets thus positioned. The solution of continuous positioning of the sheet during its transport effectively saves the time required for conventional jogging. However, the increase in productivity thus obtained requires a significant investment. Indeed, the cost increase between a conventional jogging system and a continuous positioning device such as that described in FIGS. EP 1'044'908 and EP 1'151'833 is considerable and is economically justified only on certain types of machines.

Enfin, on a décrit dans le EP 1'308'406 un dispositif pour détecter la position d'un bord latéral d'une feuille dans une station d'introduction. Selon ce dispositif, on effectue une comparaison entre la position détectée de l'un des bords latéraux de la feuille et la position désirée, on génère un signal de correction qui génère un signal de réglage transmis à un élément de réglage pour amener ce bord latéral dans la position désirée. Donc, on agit directement sur la feuille que l'on déplace en fonction de l'écart mesuré entre la position détectée et la position désirée. Par contre, ce document ne donne aucune indication sur la manière de mettre en oeuvre ce principe.Finally, it has been described in EP 1'308'406 a device for detecting the position of a side edge of a sheet in an insertion station. According to this device, a comparison is made between the detected position of one of the lateral edges of the sheet and the desired position, a correction signal is generated which generates an adjustment signal transmitted to a setting element to bring this lateral edge. in the desired position. Thus, one acts directly on the sheet that one moves according to the difference measured between the detected position and the desired position. However, this document gives no indication of how to implement this principle.

La présente invention a pour but de remédier, au moins partiellement, aux défauts habituels des dispositifs classiques de taquage de feuilles, sans conduire à une solution susceptible d'augmenter considérablement le coût de la machine de traitement à laquelle le dispositif de positionnement de feuilles est associé.The object of the present invention is to remedy, at least partially, the usual defects of conventional sheet-firing devices, without leading to a solution likely to considerably increase the cost of the processing machine to which the sheet-positioning device is associated.

A cet effet, la présente invention a pour objet un dispositif de positionnement de feuilles dans une station d'introduction d'une machine de traitement, selon la revendication 1.For this purpose, the present invention relates to a device for positioning sheets in a station for introducing a processing machine according to claim 1.

L'avantage principal de cette invention est d'associer deux modes de positionnement. Pour positionner le bord avant des feuilles, elle utilise, comme dans les dispositifs de positionnement classiques, des taquets avants contre lesquels la feuille est entraînée par la table de marge, étant donné que ce mode de positionnement des bords avants des feuilles est sûr, simple et ne présente pas de défaut notable. Ces taquets avants peuvent être fixes ou réglables. Pour le positionnement latéral, on utilise un procédé qui consiste à commander des moyens d'entraînement des feuilles par des moyens optoélectroniques, évitant ainsi toute utilisation de taquets latéraux et les inconvénients qui en découlent notamment dans le cas de feuilles souples. Etant donné que le positionnement latéral est effectué, comme dans les systèmes de positionnement classiques, une fois que le bord avant de la feuille est aligné par les taquets avants, le seul mouvement à imprimer à la feuille pour la positionner latéralement est un mouvement rectiligne, ce qui constitue une simplification considérable, aussi bien du point de vue de la conception mécanique que de la commande électronique, par rapport à un système mobile selon trois axes verticaux, comme dans les dispositifs susmentionnés. Un autre avantage important de cette invention vient du fait que le positionnement latéral permet un déplacement des feuilles dans les deux sens, alors qu'un positionnement mécanique ne peut que tirer ou que pousser, ce qui ne lui permet de déplacer la feuille que dans un sens.The main advantage of this invention is to combine two positioning modes. To position the front edge of the sheets, it uses, as in conventional positioning devices, front tabs against which the sheet is driven by the margin table, since this mode of positioning the front edges of the sheets is safe, simple and has no noticeable defect. These front cleats can be fixed or adjustable. For lateral positioning, a method is used which consists in controlling sheet drive means by optoelectronic means, thus avoiding any use of lateral stops and the disadvantages which result therefrom, particularly in the case of flexible sheets. Since lateral positioning is performed, as in conventional positioning systems, once the leading edge of the sheet is aligned with the front tabs, the only movement to be printed on the sheet to position it laterally is rectilinear motion, which constitutes a considerable simplification, as well from the point of view of the mechanical design as the electronic control, compared to a mobile system along three vertical axes, as in the aforementioned devices. Another important advantage of this invention is that the lateral positioning allows the leaves to move in both directions, whereas a mechanical positioning can only pull or push, which allows it to move the sheet only in one direction. meaning.

Enfin, alors que les systèmes de positionnement purement mécanique ne peuvent positionner les feuilles qu'en se référant au bord de la feuille, le dispositif selon l'invention peut réaliser ce positionnement sur la base d'un repère imprimé. Ceci permet d'éviter une répercussion des erreurs entre l'impression réalisée sur les feuilles imprimées en bobine et leurs bords découpés par tronçonnage de la bobine, en utilisant l'impression comme référence et non plus le bord de feuille découpé et dont l'angle avec le bord avant de la feuille à positionner peut varier de quelques degrés par rapport à la perpendiculaire.Finally, whereas the purely mechanical positioning systems can position the sheets only by referring to the edge of the sheet, the device according to the invention can achieve this positioning on the basis of a reference mark. printed. This makes it possible to avoid a repercussion of the errors between the printing carried out on the printed sheets in reel and their cut edges by cutting off the reel, using the printing as a reference and no longer the cut edge of the sheet and whose angle with the front edge of the sheet to be positioned may vary a few degrees from the perpendicular.

D'autres particularités apparaîtront au cours de la description qui va suivre, qui s'appuiera sur les dessins annexés qui illustrent, schématiquement et à titre d'exemple, une forme d'exécution du dispositif de positionnement objet de la présente invention.

  • La figure 1 est une vue en perspective illustrant le principe de positionnement utilisé dans ce dispositif;
  • la figure 2 est une vue en élévation transversale du dispositif de positionnement;
  • la figure 3 est une vue en coupe selon la ligne III-III de la figure 2;
  • la figure 4 est une vue en coupe selon la ligne IV-IV de la figure 2;
  • la figure 5 est une vue semblable à la figure 2, illustrant une variante;
  • la figure 6 est une vue en coupe selon VI-VI de la figure 5;
  • la figure 7 est une vue partielle en coupe agrandie de la partie à l'intérieur du cercle VII de la figure 5;
  • la figure 8 est un organigramme informatique de la commande du processus de positionnement.
Other features will become apparent from the following description, which will be based on the accompanying drawings which illustrate, schematically and by way of example, an embodiment of the positioning device object of the present invention.
  • The figure 1 is a perspective view illustrating the positioning principle used in this device;
  • the figure 2 is a transverse elevational view of the positioning device;
  • the figure 3 is a sectional view along line III-III of the figure 2 ;
  • the figure 4 is a sectional view along line IV-IV of the figure 2 ;
  • the figure 5 is a view similar to the figure 2 , illustrating a variant;
  • the figure 6 is a sectional view according to VI-VI of the figure 5 ;
  • the figure 7 is a partial view in enlarged section of the part inside the circle VII of the figure 5 ;
  • the figure 8 is a flowchart of the control of the positioning process.

Le processus de positionnement est expliqué à l'aide des figures 1 et 8. La feuille 1 à positionner est entraînée par une table de marge T d'une machine de traitement de feuilles, telle qu'une presse de découpage, une machine d'impression, dans laquelle la feuille qui vient de subir une opération d'impression ou de découpage doit être positionnée avec précision en vue d'une opération suivante, de manière à assurer une même position de référence de la feuille pour les opérations successives, afin que la position d'une impression ou d'un découpage par exemple ne soit pas décalée par rapport à l'opération de découpage ou d'impression qui l'a précédée.The positioning process is explained using the figures 1 and 8 . The sheet 1 to be positioned is driven by a margin table T of a sheet processing machine, such as a cutting press, a printing machine, in which the sheet which has just undergone a printing or cutting operation must be accurately positioned for a subsequent operation, so as to ensure the same reference position of the sheet for the successive operations, so that the position of an impression or a cutting, for example, is not shifted with respect to the cutting or printing operation that preceded it.

A cet effet, après la première opération, la feuille 1 est entraînée dans le sens de la flèche F par la table de marge T contre une série de taquets avants 2, dont la position pourrait être réglable. Dans cet exemple, cette fonction est réalisée, de préférence, par au moins un organe presseur à galet 3, commandé par une came ou un vérin pneumatique (non représentés), qui presse la feuille 1 contre une coulisse transversale 4, disposée entre la table de marge T et les taquets avants 2. Cet organe presseur 3 pourrait aussi être remplacé par un organe de préhension, notamment une bouche d'aspiration ménagée sur la coulisse transversale et reliée à une source d'aspiration. Une cellule photo-électrique ou une caméra 5 sert à détecter un bord latéral de la feuille 1 ou, de préférence, un repère dont la position est caractéristique de celle de l'impression ou de la découpe de cette feuille 1 et à comparer sa position à une position de référence. Cette cellule est reliée à une entrée d'un poste de commande 6, dont une sortie est reliée à un actuateur, notamment un moteur linéaire 7 pour l'entraînement de la coulisse transversale 4 en fonction de l'écart entre la position latérale mesurée de la feuille et la position de référence. Ce poste de commande 6 génère un courant d'alimentation d'un moteur linéaire 7 en fonction du sens dans lequel le moteur linéaire 7 doit se déplacer pour amener le bord ou le repère de la feuille 1 dans la position de référence.For this purpose, after the first operation, the sheet 1 is driven in the direction of the arrow F by the margin table T against a series of front cleats 2, whose position could be adjustable. In this example, this function is preferably performed by at least one roller press member 3, controlled by a cam or a pneumatic cylinder (not shown), which presses the sheet 1 against a transverse slide 4, arranged between the table T margin and the front lugs 2. This pressing member 3 could also be replaced by a gripping member, including a suction mouth formed on the transverse slide and connected to a suction source. A photoelectric cell or a camera 5 serves to detect a lateral edge of the sheet 1 or, preferably, a mark whose position is characteristic of that of the printing or cutting of this sheet 1 and to compare its position. at a reference position. This cell is connected to an input of a control station 6, an output of which is connected to an actuator, in particular a linear motor 7 for driving the transverse slide 4 as a function of the difference between the measured lateral position of the sheet and the reference position. This control station 6 generates a supply current of a linear motor 7 according to the direction in which the linear motor 7 must move to bring the edge or the marker of the sheet 1 into the reference position.

Les figures 2 à 4 illustrent le dispositif pour le positionnement de feuilles dans une station d'introduction d'une machine de traitement. Ce dispositif comporte un support transversal 8 solidaire du bâti 9 de la machine de traitement qui s'étend aux deux extrémités du support transversal 8. Celui-ci comporte en son centre un moteur linéaire 7 dont un rail d'aimant 10 présentant un profil en forme de U, est fixé par des vis 11 à ce support transversal 8. Une bobine 12, disposée dans le rail d'aimant 10 du moteur linéaire 7, est fixée à une partie mobile 13 de ce moteur linéaire 7 par des vis 16. Cette bobine 12 est reliée à une sortie du poste de commande 6 (figure 1). La partie mobile 13, qui joue le rôle d'une coulisse transversale, est reliée au support transversal 8 par deux chariots 14a, 14b disposés de part et d'autre du moteur linéaire 10, 12. Chaque chariot 14a, 14b est en prise avec deux glissières de guidage parallèles 15a, 15b (figure 3). La surface supérieure de cette coulisse transversale, formée par la partie mobile 13, est solidaire d'un profilé d'aluminium 17 revêtu d'un matériau à coefficient de frottement élevé tel qu'un polyuréthane, ou ayant un état de surface rugueux.The Figures 2 to 4 illustrate the device for positioning sheets in an introduction station of a processing machine. This device comprises a transverse support 8 integral with the frame 9 of the processing machine which extends at both ends of the transverse support 8. The latter comprises in its center a linear motor 7 including a magnet rail 10 having a profile of U-shape, is fixed by screws 11 to this transverse support 8. A coil 12, disposed in the magnet rail 10 of the linear motor 7, is fixed to a mobile part 13 of this linear motor 7 by screws 16. This coil 12 is connected to an output of the control station 6 ( figure 1 ). The movable part 13, which acts as a transverse slide, is connected to the transverse support 8 by two carriages 14a, 14b arranged on either side of the linear motor 10, 12. Each carriage 14a, 14b is engaged with two parallel guide rails 15a, 15b ( figure 3 ). The upper surface of this transverse slide, formed by the movable portion 13, is secured to an aluminum profile 17 coated with a high friction material such as a polyurethane, or having a rough surface state.

Le dispositif de positionnement comporte encore un profilé transversal 18 solidaire de deux coulisses verticales 19a, 19b montées dans deux guides verticaux 20a, 20b solidaires du bâti 9. La base de chaque coulisse verticale 19a, 19b est pressée par un ressort 21a, 21b contre un galet 22a, 22b monté pivotant à l'extrémité d'un bras d'une bascule 23a, 23b pivotée en son centre sur le bâti 9. Un second galet, dont seul le galet 24a est visible sur la figure 4, est monté pivotant à l'autre extrémité du bras de chaque bascule 23a, 23b. Ces seconds galets des bascules 23a, 23b sont pressés contre deux cames respectives, dont seule la came 25a est visible sur la figure 4, solidaires d'un arbre de commande 26 en liaison cinématique avec le mécanisme d'entraînement (non représenté) de la machine de traitement des feuilles 1.The positioning device also comprises a transverse section 18 integral with two vertical slides 19a, 19b mounted in two vertical guides 20a, 20b integral with the frame 9. The base of each vertical slide 19a, 19b is pressed by a spring 21a, 21b against a roller 22a, 22b pivoted at the end of an arm of a rocker 23a, 23b pivoted at its center on the frame 9. A second roller, of which only the roller 24a is visible on the figure 4 , is pivotally mounted at the other end of the arm of each rocker 23a, 23b. These second rollers of the latches 23a, 23b are pressed against two respective cams, of which only the cam 25a is visible on the figure 4 , in solidarity with a tree 26 in kinematic connection with the drive mechanism (not shown) of the sheet processing machine 1.

Deux paires de galets presseurs 27a, 27b sont pivotés librement autour d'axes perpendiculaires au profilé transversal 18, donc parallèles à la direction F d'avance de la feuille 1 et solidaires de deux supports 28a, respectivement 28b. Chaque support 28a, 28b comporte deux organes de réglage 29a, 29b, 30a, 30b pour ajuster la hauteur, respectivement la position latérale de chaque support 28a, 28b.Two pairs of pressure rollers 27a, 27b are pivoted freely about axes perpendicular to the transverse section 18, therefore parallel to the direction F of advance of the sheet 1 and integral with two supports 28a, respectively 28b. Each support 28a, 28b comprises two adjustment members 29a, 29b, 30a, 30b for adjusting the height, respectively the lateral position of each support 28a, 28b.

Chaque tour de l'arbre de commande 26 correspond à un cycle de fonctionnement du dispositif de positionnement au cours duquel les cames 25a, 25b font pivoter les bascules 23a, 23b, provoquant la descente des galets 27a, 27b contre le profilé d'aluminium 17, pinçant ainsi la feuille 1 entre ce profilé 17 et les galets 27a, 27b après que celle-ci soit amenée en appui contre les taquets avants 2. La cellule de détection 5 mesure la position du bord latéral de la feuille 1 ou d'un repère porté par cette feuille et transmet la valeur et le sens de l'écart mesuré au poste de commande 6. Celui-ci envoie un courant électrique à la bobine 12 du moteur linéaire pour déplacer la coulisse transversale 13, constituant la partie mobile du moteur linéaire, dans le sens désiré jusqu'à ce que la position détectée par la cellule de détection signale que la position latérale de la feuille 1 correspond à la position de référence.Each turn of the control shaft 26 corresponds to an operating cycle of the positioning device in which the cams 25a, 25b rotate the latches 23a, 23b, causing the rollers 27a, 27b to descend against the aluminum profile 17 , thus pinching the sheet 1 between this profile 17 and the rollers 27a, 27b after it is brought in abutment against the front lugs 2. The detection cell 5 measures the position of the lateral edge of the sheet 1 or a reference carried by this sheet and transmits the value and direction of the difference measured at the control station 6. This sends an electric current to the coil 12 of the linear motor to move the transverse slide 13, constituting the moving part of the motor linearly, in the desired direction until the position detected by the detection cell signals that the lateral position of the sheet 1 corresponds to the reference position.

Cette opération de déplacement latéral de la feuille 1 par le moteur linéaire s'effectue en synchronisme avec la rotation de l'arbre de commande 26, de sorte qu'à la fin de la correction, les cames 25a, 25b, solidaires de l'arbre de commande 26, font pivoter les bascules 23a, 23b dans le sens contraire à celui des aiguilles de la montre (figure 4), soulevant les coulisses 19a, 19b et les galets 27a, 27b. La feuille 1 est ainsi libérée et le cycle peut recommencer avec une feuille 1 suivante. Les moyens utilisés pour l'évacuation de la feuille positionnée, sont constitués par une barre de pince classique. Celle-ci n'est pas représentée dans la mesure où elle ne fait pas partie de l'invention et n'est pas nécessaires à sa compréhension.This operation of lateral displacement of the sheet 1 by the linear motor is carried out in synchronism with the rotation of the control shaft 26, so that at the end of the correction, the cams 25a, 25b, integral with the control shaft 26, rotate the latches 23a, 23b in the opposite direction to that of the hands of the watch ( figure 4 ), lifting the slides 19a, 19b and the rollers 27a, 27b. The sheet 1 is thus released and the cycle can start again with a following sheet 1. The means used for the evacuation of the positioned sheet are constituted by a conventional clamp bar. This is not represented to the extent that it does not form part of the invention and is not necessary for its comprehension.

Selon la variante du dispositif illustré par les figures 5 à 7, au lieu d'associer le profilé transversal 18 à des coulisses verticales 19a, 19b, cette variante comporte un profilé transversal 31 solidaire par ses deux extrémités du bâti 9. Chaque paire de galets presseurs ou de patins 27a, 27b est alors solidaire de la tige d'un vérin 32a, 32b, ainsi que de deux tiges de guidage 33a, 33b, montées coulissantes dans le corps du vérin 32a, 32b, en sorte que ces galets ou patins 27a, 27b sont appliqués contre la feuille 1 posée sur la partie mobile 13 du moteur linéaire au moment de son positionnement latéral, par les vérins 32a, 32b. Une telle variante constitue une solution plus avantageuse que la forme d'exécution illustrée par la figure 2, parce que moins coûteuse.According to the variant of the device illustrated by Figures 5 to 7 , instead of associating the transverse profile 18 with vertical slides 19a, 19b, this variant comprises a transverse section 31 secured by its two ends to the frame 9. Each pair of pressure rollers or pads 27a, 27b is then secured to the rod of a jack 32a, 32b, and two guide rods 33a, 33b, slidably mounted in the body of the jack 32a, 32b, so that these rollers or pads 27a, 27b are applied against the sheet 1 placed on the mobile part 13 of the linear motor at the time of its lateral positioning, by the cylinders 32a, 32b. Such a variant constitutes a more advantageous solution than the embodiment illustrated by the figure 2 because less expensive.

Claims (8)

  1. Device for positioning sheets (1) in an infeed station of a processing machine, comprising a feed table (T) having drive means for said sheets, at least one front positioning stop (2) to stop the leading edges of said sheets (1), register means (5) of the lateral position of said sheets (1), means for comparing said position to a reference position, transverse drive means (7) for said sheets (1) and control means (6) for actuating the transverse drive means (7) according to the direction and the difference between the registered lateral position of said sheet and said reference position and to stop them when the position of the sheet corresponds to the reference position, characterized in that said transverse drive means (7) include a single transverse slide (13) arranged between said stop (2) and said feed table (T), drive means (7) of the transverse slide (13) connected to said control means (6) and intended to drive said slide according to said direction and difference of position and means (27a, 27b) for jointly attaching said sheet (1) with the transverse slide (13), said register means (5) of the lateral position of said sheets (1) including an optical reader (5) able to measure the lateral position of the lateral register marks carried by each of said sheets (1).
  2. Device according to claim 1, wherein the means for jointly attaching said sheet (1) with the single transverse slide (13) include, on both sides of the plane of said sheet, at least one pressing device (27a, 27b), for applying said sheet (1) against said transverse slide (13), and means (19a, 19b; 32a, 32b) for moving said pressing device (27a, 27b) perpendicularly to the plane of said sheet (1).
  3. Device according to claim 2, wherein said means for moving said pressing device (27a, 27b) include two slides (19a, 19b) perpendicularly arranged with respect to the plane of said sheet, kinematically linked to the drive mechanism (26) of said processing machine.
  4. Device according to claim 1, wherein the surface (17) of said single transverse slide (13) in contact with said sheets (1) is made of a material with a high coefficient of friction with respect to the sheets.
  5. Device according to claim 3, wherein two swings (23a, 23b) are mounted each about a horizontal axis and the respective first ends of which are in contact with the respective lower ends of said vertial slides (19a, 19b), which include elastic means (21a, 21b) for applying the respective second ends of said swings (23a, 23b) against the cams (25a, 25b) secured to a shaft (26) kinematically linked to said drive means (T) of the processing machine.
  6. Device according to claim 2, wherein said pressing devices (27a, 27b) are each secured to a jack (32a, 32b) for bringing them in contact with said single transverse slide (13).
  7. Device according to one of the preceding claims, wherein said single transverse slide (13) is slidably mounted by means of two guiding carriages (14a, 14b).
  8. Device according to claim 1, wherein said optical reader (5) is able to form successive images of the lateral positions of the trajectories of the lateral register marks carried by each of said sheets (1) and characteristic of the lateral position of a print carried by each of said sheets (1).
EP04405551A 2003-09-23 2004-09-06 Sheet positioning device in a feeding station of a treatment machine Revoked EP1518803B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04405551A EP1518803B1 (en) 2003-09-23 2004-09-06 Sheet positioning device in a feeding station of a treatment machine

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03405692 2003-09-23
EP03405692 2003-09-23
EP04405551A EP1518803B1 (en) 2003-09-23 2004-09-06 Sheet positioning device in a feeding station of a treatment machine

Publications (2)

Publication Number Publication Date
EP1518803A1 EP1518803A1 (en) 2005-03-30
EP1518803B1 true EP1518803B1 (en) 2009-10-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04405551A Revoked EP1518803B1 (en) 2003-09-23 2004-09-06 Sheet positioning device in a feeding station of a treatment machine

Country Status (4)

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EP (1) EP1518803B1 (en)
AT (1) ATE446268T1 (en)
DE (1) DE602004023679D1 (en)
ES (1) ES2331882T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2407402A2 (en) 2010-07-14 2012-01-18 Heidelberger Druckmaschinen AG Device and method for positioning sheets

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3311197A1 (en) * 1983-03-26 1984-10-04 Heidelberger Druckmaschinen Ag, 6900 Heidelberg METHOD FOR FITTING BOWS WITH A FIT
DE3417764A1 (en) * 1984-05-12 1985-11-14 Heidelberger Druckmaschinen Ag, 6900 Heidelberg FEEDING DEVICE FOR BOW-PROCESSING MACHINES, IN PARTICULAR PRINTING MACHINES
CH676695A5 (en) * 1988-05-19 1991-02-28 Bobst Sa
CH689639A5 (en) * 1994-02-24 1999-07-30 Bobst Sa Device for lateral aligning of flat elements on a table.
DE19618030B4 (en) * 1996-05-04 2006-06-01 Heidelberger Druckmaschinen Ag Method and device for laterally aligning a sheet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2407402A2 (en) 2010-07-14 2012-01-18 Heidelberger Druckmaschinen AG Device and method for positioning sheets
DE102010027119A1 (en) 2010-07-14 2012-01-19 Heidelberger Druckmaschinen Ag Method and device for positioning sheets

Also Published As

Publication number Publication date
EP1518803A1 (en) 2005-03-30
ATE446268T1 (en) 2009-11-15
ES2331882T3 (en) 2010-01-19
DE602004023679D1 (en) 2009-12-03

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