EP1518803B1 - Positionierungsvorrichtung für Bögen in der Zuführstation einer Verarbeitungsmaschine - Google Patents

Positionierungsvorrichtung für Bögen in der Zuführstation einer Verarbeitungsmaschine 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
Prior art date
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Revoked
Application number
EP04405551A
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English (en)
French (fr)
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EP1518803A1 (de
Inventor
Marco Cardillo
Edmond Lambercy
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Bobst Mex SA
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Bobst SA
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Publication date
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Application filed by Bobst SA filed Critical Bobst SA
Priority to EP04405551A priority Critical patent/EP1518803B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/10—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.

Landscapes

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

Claims (8)

  1. Vorrichtung zur Positionierung von Bogen (1) in einer Zuführungs-Station einer Bearbeitungsmaschine, umfassend einen Anlagetisch (T), welcher Antriebsmittel für die Bogen aufweist, wenigstens einen frontalen Positionierungs-Anschlag (2), um die vorderen Ränder der Bogen (1) anzuhalten, Erfassungsmittel (5) für die seitliche Position der Bogen (1), Mittel zum Vergleichen dieser Position mit einer Referenzposition, transversale Antriebsmittel (7) für die Bogen (1) und Steuermittel (6), um die Antriebsmittel (7) in Abhängigkeit von der Richtung und dem Abstand zwischen der erfassten seitlichen Position des Bogens und der Referenzposition anzutreiben, und um sie anzuhalten, wenn die Position dieses Bogens der Referenzposition entspricht,
    dadurch gekennzeichnet, dass die transversalen Antriebsmittel (7) einen einzigen transversalen Schieber (13) umfassen, der zwischen dem Anschlag (2) und dem Anlagetisch (T) angeordnet ist, Antriebsmittel (7) für diesen transversalen Schieber (13), die mit den Steuermitteln (6) verbunden und dazu bestimmt sind, den Schieber in Abhängigkeit von der Richtung und dem Abstand der Position anzutreiben, und Mittel (27a, 27b), um den Bogen (1) mit dem transversalen Schieber (13) zu verbinden, wobei die Erfassungsmittel (5) für die seitliche Position der Bogen (1) eine optische Leseeinrichtung (5) umfassen, die dazu geeignet ist, die seitliche Position von seitlichen Markierungen zu erfassen, welche von jedem der Bogen (1) getragen werden.
  2. Vorrichtung nach Anspruch 1, wobei die Mittel, um den Bogen (1) mit dem einzigen transversalen Schieber (13) zu verbinden, auf beiden Seiten der Ebene des Bogens wenigstens ein Druckelement (27a, 27b) umfassen, um den Bogen (1) gegen den transversalen Schieber (13) zu klemmen, und Mittel (19a, 19b; 32a, 32b), um das Druckelement (27a, 27b) senkrecht zu der Ebene des Bogens (1) zu verlagern.
  3. Vorrichtung nach Anspruch 2, wobei die Mittel, um das Druckelement (27a, 27b) zu verlagern, zwei zur Ebene des Bogens senkrechte Schieber (19a, 19b) umfassen, die kinematisch mit dem Antriebsmechanismus (26) der Bearbeitungsmaschine verbunden sind.
  4. Vorrichtung nach Anspruch 1, wobei die Fläche (17) des einzigen transversalen Schiebers (13) in Kontakt mit den Bogen (1) aus einem Material mit in Bezug auf das Material dieser Bogen hohem Reibungskoeffizienten besteht.
  5. Vorrichtung nach Anspruch 3, wobei zwei Wippen (23a, 23b) jeweils um eine horizontale Achse gelenkig sind und deren jeweilige erste Enden in Kontakt mit den jeweiligen unteren Enden der vertikalen Schieber (19a, 19b) stehen, wobei diese elastische Mittel (21a, 21 b) umfassen, um die jeweiligen zweiten Enden der Wippen (23a, 23b) gegen Nocken (25a, 25b) anzulegen, die mit einer Welle (26) verbunden sind, die in kinematischer Verbindung mit den Antriebsmitteln (T) der Bearbeitungsmaschine steht.
  6. Vorrichtung nach Anspruch 2, wobei die Druckelemente (27a, 27b) jeweils mit einem Zylinder (32a, 32b) verbunden sind, um sie in Kontakt mit dem einzigen transversalen Schieber (13) zu bringen.
  7. Vorrichtung nach einem der vorhergehenden Ansprüche, wobei der einzige transversale Schieber (13) vermittels zweier Führungsschlitten (14a, 14b) verschiebbar angebracht ist.
  8. Vorrichtung nach Anspruch 1, wobei die optische Leseeinrichtung (5) dazu geeignet ist, aufeinander folgende Bilder der seitlichen Positionen der Trajektorien von seitlichen Markierungen zu bilden, die von jedem der Bogen (1) getragen werden, und die kennzeichnend für die seitliche Position eines Aufdrucks sind, der von jedem der Bogen (1) getragen wird.
EP04405551A 2003-09-23 2004-09-06 Positionierungsvorrichtung für Bögen in der Zuführstation einer Verarbeitungsmaschine Revoked EP1518803B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04405551A EP1518803B1 (de) 2003-09-23 2004-09-06 Positionierungsvorrichtung für Bögen in der Zuführstation einer Verarbeitungsmaschine

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03405692 2003-09-23
EP03405692 2003-09-23
EP04405551A EP1518803B1 (de) 2003-09-23 2004-09-06 Positionierungsvorrichtung für Bögen in der Zuführstation einer Verarbeitungsmaschine

Publications (2)

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

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EP04405551A Revoked EP1518803B1 (de) 2003-09-23 2004-09-06 Positionierungsvorrichtung für Bögen in der Zuführstation einer Verarbeitungsmaschine

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2407402A2 (de) 2010-07-14 2012-01-18 Heidelberger Druckmaschinen AG Verfahren und Vorrichtung zum Positonieren von Bogen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3311197A1 (de) * 1983-03-26 1984-10-04 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Verfahren zum passgenauen zufuehren von boegen
DE3417764A1 (de) * 1984-05-12 1985-11-14 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Zufuehreinrichtung fuer bogenverarbeitende maschinen, insbesondere druckmaschinen
CH676695A5 (de) * 1988-05-19 1991-02-28 Bobst Sa
CH689639A5 (fr) * 1994-02-24 1999-07-30 Bobst Sa Dispositif de taquage latéral d'éléments plats sur une table.
DE19618030B4 (de) * 1996-05-04 2006-06-01 Heidelberger Druckmaschinen Ag Verfahren und Vorrichtung zum seitlichen Ausrichten eines Bogens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2407402A2 (de) 2010-07-14 2012-01-18 Heidelberger Druckmaschinen AG Verfahren und Vorrichtung zum Positonieren von Bogen
DE102010027119A1 (de) 2010-07-14 2012-01-19 Heidelberger Druckmaschinen Ag Verfahren und Vorrichtung zum Positionieren von Bogen

Also Published As

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

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