EP0913352B1 - Plieuse à poches et procédé de contrôle du registre dans une plieuse à poches - Google Patents

Plieuse à poches et procédé de contrôle du registre dans une plieuse à poches Download PDF

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Publication number
EP0913352B1
EP0913352B1 EP98119757A EP98119757A EP0913352B1 EP 0913352 B1 EP0913352 B1 EP 0913352B1 EP 98119757 A EP98119757 A EP 98119757A EP 98119757 A EP98119757 A EP 98119757A EP 0913352 B1 EP0913352 B1 EP 0913352B1
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EP
European Patent Office
Prior art keywords
buckle
sheet
folding
fold
detecting
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
EP98119757A
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German (de)
English (en)
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EP0913352A3 (fr
EP0913352A2 (fr
Inventor
Hatto Dr. Hechler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Publication of EP0913352A2 publication Critical patent/EP0913352A2/fr
Publication of EP0913352A3 publication Critical patent/EP0913352A3/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/14—Buckling folders
    • B65H45/142—Pocket-type folders
    • B65H45/144—Pockets or stops therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/14—Buckling folders
    • B65H45/142—Pocket-type folders
    • B65H45/147—Pocket-type folders folding rollers therefor

Definitions

  • the invention relates to a pocket folder with a first folding roller and two other, counter-rotating, falzsentenden Folding rollers and an adjustable folding pocket.
  • the invention also refers to a procedure for register control of a Buckle folding.
  • Pocket folders are known in the art. Three, im essentially arranged on the vertices of a right triangle Folding rollers and a folding pocket form a pocket folder.
  • the bow will be with the on the paper texture tuned running speed in the bag.
  • the folding process takes place continuously in a pocket folder and is not tied to any timing, resulting in large folding performance can be achieved.
  • a pocket folding machine can be provided several Taschenfalzwerke.
  • According to the going through Sheet thickness of the folding roller gap must be set. This is done by storing the folding rollers on a two-armed lever, the end of the folding roller opposite end of an adjusting screw is charged.
  • the folding pocket stop, the width the folding pocket and the position of the pocket mouth and the pocket lips to the compression space must on the used paper quality and the Sheet format are set. In addition, these settings must be be made even with changed humidity, since This changes the stiffness of the paper.
  • Document DE 9 606 855 11 discloses a device as well a method for determining a positional deviation of the Falzbruch on a sheet in a pocket folder during a production process.
  • a pocket folder is created which allows the determination of the timing of the formation of folds is.
  • a pocket folder should be specified, which allows a regulation of the position of the fold break on the sheet.
  • a method for register control of a pocket folder be stated that a constant position of the fold break on the bow at changed production speed or paper stiffness guaranteed.
  • the fold formation takes place exactly from the time at which the sagging compression fold is detected by the two fold-forming folding rollers.
  • To fold the crimping rollers apply pressure to the crimp fold. Thereby the folding rollers are deflected to a small extent.
  • the capture the deflection of at least one of the fold-forming folding rollers allows therefore, the exact determination of the timing of the fold formation also at several fold breaks.
  • By the between bow entry and fold formation supported arc length is determined, is a setpoint to Available, which marks a proper hemming.
  • the Deflection of the fold-forming folding rollers can be done by measuring methods, which measure the movement directly, e.g. Way, speed or acceleration measurement, or by measuring methods that by measure the motion triggered responses, e.g. Force or deformation measurement on powerful components.
  • the means for Detecting the Falzwalzenauslenkung on at least one bearing lever of Crimping rollers have a strain gauge arrangement.
  • the elastic Deformation of the bearing lever and the reaction forces at a deflection The folding roller can thus directly without moving parts electrically detected and thus further processed in a simple manner become.
  • the funds for Detecting the Falzwalzenausschung at least one, on a bearing lever the folding roller arranged piezoelectric sensor.
  • piezoelectric sensors for example, the acceleration or by further processing of the measurement signals and the path of the bearing lever the folding roller are detected.
  • the Means for detecting the Falzwalzenausschung at least one optical sensor on.
  • the detection of Falzwalzenausschung can in this case, for example, via a light barrier or via the Reflection of a light beam to the bearing lever done.
  • the means for Detecting the sheet inlet at least have an optical sensor.
  • An optical sensor makes it easy to get the reliable one and exact detection of the sheet inlet, for example by the reflection or transmission that changes at the bow entry is detected.
  • the means of determining the between Bogeneinlauf and folding formation promoted arc length Pulse generator associated with a folding roller and a counting device exhibit.
  • the folding roller can over the Number of pulses emitted by the pulse generator of a Peripheral point of the folding roller traveled path and thus the subsidized Arc length to be determined.
  • Pulse generator Since in general all three folding rollers of the The folder can rotate at the same peripheral speed Pulse generator on each of the folding rollers or on the drive train of the Folder be arranged.
  • a pulse generator are magnetically inductive, optical or Hall sensors using sensors suitable.
  • Counting device may be a commercially available discrete electrical Circuit or an integrated circuit are used.
  • optical sensors for detecting the start of printing on a incoming bow provided.
  • This embodiment of the invention is Especially advantageous if, for example, a booklet or a prospectus is to be produced in which the printed image is relative moved to the start of the sheet or fluctuates. The fold must break at such sheets with respect to the printed image to be placed exactly, otherwise in case of fluctuations between the start of the sheet and the beginning of the print image the edge sometimes cut away.
  • the capture of the print image start is in a simple way with a the transmission or reflection of the Arc-measuring optical sensor possible.
  • the adjustable folding pocket at least having an electrically activatable actuating device and a Control unit is provided which detects the signals of the means of detection the sheet inlet, the means for detecting the deflection at least one of the folding rollers in the folding and the means of determination the processed between sheet inlet and folding sheet length processed and the electrically activatable actuating device of the folding pocket controls.
  • adjusting devices can be provided with a potentiometer servomotors or stepper motors may be provided.
  • control unit continues the Signal from the sensor processed to capture the start of print. Even with positional deviations of the printed image on a sheet can by the inclusion of the signal of the image sensor the exact position of the Folding break can be ensured. Become defective end products thereby avoided.
  • the electric activatable actuator displaces the Falztaschenanschlag.
  • moving the folding plate stop is in the folding pocket retractable arc length changed, causing a change in deformation the arc in the compression space or in the folding pocket are compensated can.
  • the adjustment of the pocket stop obliquely to the insertion direction of the signature in the folder pocket. This can for example, compensates for a printed image skewed on a sheet become.
  • an electrically activatable actuating device adjusted the folding pocket width. At higher production speed may require the adjustment of the folding pocket width be to a wave-like deformation of the sheet in the folding pocket too avoid.
  • an electrically activatable Adjusting device adjusted at least one Falztaschenlippe.
  • the Adjustment of the Falztaschenlippe may be advantageous if the Formation of the compression fold in the compression space must be affected.
  • an electric activatable actuating device for changing the compression space the Pocket mouth moves Lets the stiffness of a paper sheet, for example with increasing humidity, the compression space must be reduced in size to ensure proper formation of the crease and thus ensuring a correct position of the seam break on the sheet.
  • control unit having a microprocessor. This allows complex control operations be carried out with numerous parameters. Also, the control algorithms by reprogramming the microprocessor to simple Be changed. In addition, the automatic detection of setpoints, and their possible adjustment during the production process implemented as part of a self-learning microprocessor become.
  • a method for register control of a Pocket folding provided according to the in a learning phase, a target value the conveyed sheet length determined between sheet inlet and fold becomes.
  • a target value the conveyed sheet length determined between sheet inlet and fold becomes.
  • a between Sheet feed and fold formation determined actual value of the subsidized Arc length by driving the electric actuator on the Setpoint controlled.
  • Fig. 1a shows a folding unit according to the invention for processing a paper sheet 10.
  • a first folding roller 12 is vertically above a second folding roller 14 is arranged.
  • Horizontal next to the second Folding roller 14 is another, third folding roller 16 is arranged. All three folding rollers 12, 14 and 16 have the same peripheral speed on.
  • the folding rollers 12 and 14 or 14 and 16 rotate in opposite directions.
  • Fig. 1a shows the time of sheet inlet, too that of a conventional conveyor, for example a skew roll or bias belt table, conveyed sheet 10 the passes optical sensor 18 for detecting the sheet inlet.
  • the sheet 10 is then of the Folding rollers 12 and 14 detected and with its front end in the folding pocket 20 promoted.
  • Fig. 1c can be seen that the two folding rollers 12 and 14 the folded sheet 10 to the fold plate stop 22 of the folding pocket 20 promote. Since the sheet 10 now with its front end to the folding pocket stop 22, he can not continue in the Move in fold pocket 20.
  • Fig. 1e shows how the compression fold between the two folding rollers 14 and 16 is drafted.
  • Fig. 1f the timing of the fold formation is shown.
  • the folding rollers 14 and 16 exert on the compression fold of the sheet 10 a Force on, on the other hand, the folding rollers 14 and 16 deflected become.
  • the folding roller 16 is at one end of a two-armed Lever 26 rotatably mounted, which can pivot about the bearing point 28.
  • the lever 26 and thus the folding roller 16 are over conventional adjustment and biasing devices biased against the folding roller 14.
  • a sensor 30 is arranged, which controls the deflection of the folding roller 16 detected.
  • the sensor 30 thus becomes the one shown in FIG. 1f Time of folding a signal to the evaluation unit 32nd deliver.
  • the optical sensor 18 for detecting the sheet inlet is also connected to the evaluation unit 32.
  • an incremental encoder 34 is provided, which, depending on from the rotation of the folding roller 16 pulses to the evaluation unit 32nd supplies.
  • the evaluation unit 32 has a counting device which the pulses emitted by the incremental encoder 34 count.
  • the counting device the evaluation unit 32 is informed by the signal of the sensor 18, this gives off when passing the sheet 10, triggered and by the signal of the sensor 30, this at the time of hemming gives up, stops. In this way, in the evaluation unit 32nd the number of pulses counted between sheet feed and fold formation to disposal.
  • the number of pulses can from the evaluation unit 32nd be converted into length units of the conveyed arc length.
  • a display device is also provided, the at each folding between sheet inlet and seaming indicates supported arc length. In this way can deviations from a setpoint, to a proper fold corresponds to be determined immediately, without the location of the fold fracture must be measured on the finished folded sheet.
  • FIG. 2 shows a second embodiment of the invention Pocket folder in a schematic representation.
  • a bow 40 will be here also by three folding rollers 42, 44 and 46 transported and folded.
  • an optical Sensor 48 is provided to detect the timing of the sheet inlet.
  • the optical sensor 48 does not only detect the time of the sheet inlet but could also start the printing process recognize on the bow. He gives both while passing the Start of the sheet 40 and then a signal from when the Printed image of the sheet 40 passes under the sensor 48.
  • the folded sheet 40 is already completely in the folding pocket 50 has been promoted and is located on the folding pocket stop 52 on.
  • Within the compression space 54 is indicated by dashed lines Lines an upset fold of the bow 40 indicated that in the same Way as in the embodiment of Figures 1a to 1f results.
  • the Folding roller 46 is rotatably mounted on a two-armed lever 56, the can pivot about a bearing point 58 and biased against the folding roller 44 is.
  • the deflection of the folding roller 46 at the folding is detected by a sensor 60, which sends this signal to a control unit 62nd supplies.
  • the sensor 60 can be both above and below the Storage point 58 may be arranged.
  • the dashed line indicated position of the sensor 60 is below the bearing point 58, in particular at Use of a strain gauge arrangement, particularly advantageous.
  • the Folding roller 46 is provided with a gear 64, the one magnetic inductive sensor 66 is opposite. Upon rotation of the folding roller 46th Therefore, the magnetic inductive sensor 66 provides pulses, respectively correspond to an incremental rotation of the folding roller 46.
  • All three Folding rollers 42, 44 and 46 have the same circumferential speed, so that the conveyed arc length at any of the folding rollers 42, 44th or 46 can be measured.
  • the magnetic inductive sensor 66 is also electrically connected to the control unit 62. As input signals are the control unit 62, as shown in FIG. 2, Consequently, the signals of the sensor 48 at sheet inlet and print image start, the signal of the sensor 60 at hemming and the incremental Signal of the magnetic inductive sensor 66 available.
  • the Control unit 62 controls a servomotor 68, the folding pocket stop 52 moves.
  • Fig. 2 shows an operating state of the folding unit in which working at low arc speed. In this Operating state is a setpoint of the conveyed arc length between Sheet entry or print start and fold formation determined. These Learning phase becomes lower before the actual start of production Speed performed.
  • Fig. 3 shows the folding unit of Fig. 2 at higher bow speed.
  • In the folder pocket 50 is so a larger arc length than in the state shown in FIG. The crease will therefore be on the bow 40 at another Form position, causing a positional deviation of the fold break on gives the bow.
  • the signal of the sensor 60 is only at a larger promoted arc length, starting from the signal of the sensor 48, take place.
  • the control unit 62 therefore becomes a larger number of pulses from the sensor 66 before the signal from the sensor 60 when folded he follows.
  • control unit 62 therefore, a deviation determined by the determined in the learning phase of FIG. 2 setpoint become.
  • the control unit 62 therefore controls the servomotor 68 so that this the Falztaschenanschlag 52 in the direction of the Compression chamber 54 shifts.
  • the insertable in the folder pocket arc length is thereby reduced, so that the fold break of the next Arc 40 are back in the correct position on the sheet becomes.
  • FIG. 4 the timing of the sensor signals of Sensors 48, 60 and 66 of Figures 2 and 3 shown schematically. in the The upper diagram of FIG. 4 shows the sensor signals at low speed. i.e. the state of Fig. 2, shown.
  • the sheet / print image sensor 48 detects the sheet entrance.
  • the incremental encoder 66 is, also from the Sheet / print image sensor 48, the beginning of the printed image on the sheet detected. Thereby is a correction value Lr determined that in a control on the Print image start of a sheet is required.
  • time B takes place the hemming detected by the signal of the sensor 60 is, which detects the deflection of the folding roller.
  • the lower diagram of FIG. 4 corresponds to the timing of the sensor signals in the state shown in FIG higher speed.
  • time A in turn, from the Sheet / print image sensor 48 detects the sheet inlet, and two pulses of the Incremental encoder 66 later, the print image begins on the sheet detected. This corresponds to the correction value Lr.
  • Lr the correction value
  • the bow deforms in the folding pocket, as in the Fig. 3 is shown, like a wave, so that a larger arc length in the Folded pocket is promoted before the compression fold can form.
  • Time B at which the sensor 60 detects the fold formation, takes place therefore later, so that between sheet inlet A and fold B a Arc length Ls + ⁇ L is promoted. In that shown in FIG.
  • ⁇ L is two pulses.
  • the control unit 62 must Actuator 68 drive so that this the folding pocket stop 52nd shifts until between the bow entry A and fold B detected pulse count again corresponds to the setpoint Ls.
  • FIG. 6 shows a schematic representation of a folding machine 70 with a folding unit according to the invention.
  • a bow 72 is running under a sensor 74 for detecting the sheet entry and the printing image start by and is detected by folding rollers 76, 78 and 80 and folded.
  • At the end of the folding pocket 82 is a Falztaschenanschlag 84th arranged, which is acted upon by a servomotor 86.
  • the folding roller is 80 rotatably mounted on a two-armed lever 88, at which the folding roller 80 opposite end of a sensor 90 for detecting the deflection the folding roller 80 is arranged at folding. On the first, followed by the folding rollers 76, 78 and 80 set folder other folders.
  • the folding roller 80 of the first folding unit serves at the same time as the first folding roller of a second folding unit.
  • the clarity is half in the folding machine 70 of FIG. 6 only one illustrated folding unit according to the invention, of course However, all provided in the folding machine 70 folders of the type folding unit according to the invention.

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

Claims (18)

  1. Plieuse à poches comprenant un premier rouleau de pliage (12 ; 42 ; 76) ainsi que deux autres rouleaux de pliage (14, 16 ; 44, 46 ; 78, 80) de formation de pli et tournant selon des sens de rotation opposés, et une poche de pliage (20 ; 50 ; 82) réglable, caractérisée en ce que sont prévus
    a) des moyens (18 ; 48 ; 74) pour détecter l'entrée de feuille,
    b) des moyens (30 ; 60 ; 90) pour détecter la déviation de l'un au moins des rouleaux de pliage de formation de pli (14, 16 ; 44, 46 ; 78, 80) lors de la formation du pli, et
    c) des moyens (32, 34 ; 62, 66) pour déterminer la longueur de feuille transportée entre l'entrée de feuille et la formation de pli.
  2. Plieuse à poches selon la revendication 1, caractérisée en ce que les moyens (30 ; 60 ; 90) pour détecter la déviation de rouleau de pliage comprennent un agencement de jauge de contrainte sur au moins un levier de montage (26 ; 56 ; 88) des rouleaux de pliage (16 ; 46 ; 80).
  3. Plieuse à poches selon la revendication 1 ou la revendication 2, caractérisée en ce que les moyens (30 ; 60 ; 90) pour détecter la déviation de rouleau de pliage comprennent au moins un détecteur piézo-électrique disposé sur un levier de montage (26 ; 56 ; 88) du rouleau de pliage (16 ; 46 ; 80).
  4. Plieuse à poches selon l'une des revendications précédentes, caractérisée en ce que les moyens (30 ; 60 ; 90) pour détecter la déviation de rouleau de pliage comprennent au moins un détecteur optique.
  5. Plieuse à poches selon l'une des revendications précédentes, caractérisée en ce que les moyens (18 ; 48 ; 74) pour détecter l'entrée de feuille comprennent au moins un détecteur optique.
  6. Plieuse à poches selon l'une des revendications précédentes, caractérisée en ce que les moyens pour déterminer la longueur de feuille transportée entre l'entrée de feuille et la formation de pli, comprennent un générateur d'impulsions (34 ; 66, 64) associé à un rouleau de pliage (16 ; 46) et un dispositif de comptage (32 ; 62).
  7. Plieuse à poches selon l'une des revendications précédentes, par ailleurs caractérisée en ce qu'il est prévu au moins un détecteur optique (48) pour détecter le début de l'image d'impression sur une feuille (40) entrante.
  8. Plieuse à poches selon l'une des revendications précédentes, caractérisée en ce que la poche de pliage (50 ; 82) réglable présente au moins un dispositif de réglage (68 ; 86) pouvant être activé électriquement, et en ce qu'il est prévu une unité de régulation (62) qui assure le traitement des signaux en provenance des moyens (48) pour détecter l'entrée de feuille, des moyens (60) pour détecter la déviation d'au moins un des rouleaux de pliage (46) lors de la formation de pli, et des moyens (66, 62) pour déterminer la longueur de feuille transportée entre l'entrée de feuille et la formation de pli, et qui commande le dispositif de réglage (68 ; 86) pouvant être activé électriquement, de la poche de pliage (50 ; 82).
  9. Plieuse à poches selon la revendication 7 et la revendication 8, caractérisée en ce que l'unité de régulation (62) traite en outre le signal en provenance du détecteur (48) destiné à détecter le début de l'image d'impression.
  10. Plieuse à poches selon l'une des revendications précédentes, caractérisée en ce que le dispositif de réglage (68 ; 86) pouvant être activé électriquement, règle la butée de poche de pliage (52 ; 84).
  11. Plieuse à poches selon l'une des revendications précédentes, caractérisée en ce qu'un dispositif de réglage pouvant être activé électriquement, règle la largeur de poche de pliage.
  12. Plieuse à poches selon l'une des revendications précédentes, caractérisée en ce qu'un dispositif de réglage pouvant être activé électriquement, règle au moins une lèvre de poche de pliage.
  13. Plieuse à poches selon l'une des revendications précédentes, caractérisée en ce qu'un dispositif de réglage pouvant être activé électriquement, déplace l'embouchure de poche de pliage pour faire varier l'espace de refoulement.
  14. Plieuse à poches selon l'une des revendications précédentes, caractérisée en ce que l'unité de régulation (62) comprend un microprocesseur.
  15. Procédé de réglage de registre d'une plieuse à poches selon l'une des revendications 8 à 13, caractérisé en ce qu'au cours d'une phase d'apprentissage, on détermine une valeur de consigne (Ls) de la longueur de feuille transportée entre l'entrée de feuille et la formation de pli, et pendant le fonctionnement en mode de production, on régule une valeur réelle de la longueur de feuille transportée déterminée entre l'entrée de feuille (A) et la formation de pli (B), sur la valeur de consigne (Ls), par commande du dispositif de réglage (68 ; 86).
  16. Procédé selon la revendication 15, caractérisé en ce que dans le cas d'une régulation sur le début de l'image d'impression d'une feuille (40), on détermine pour chaque feuille (40) entrante, une différence de longueur (Lr) entre l'entrée de feuille et le début de l'image d'impression de la feuille (40).
  17. Procédé selon la revendication 16, caractérisé en ce que des variations de la différence de longueur sont compensées par régulation, dans le sens d'une relation constante entre le début de l'image d'impression et la position de la ligne de pli.
  18. Procédé selon la revendication 16 ou 17, caractérisé en ce que la valeur de consigne (Ls) est corrigée avec la différence de longueur (Lr) entre l'entrée de feuille et le début de l'image d'impression.
EP98119757A 1997-10-30 1998-10-22 Plieuse à poches et procédé de contrôle du registre dans une plieuse à poches Expired - Lifetime EP0913352B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19747997 1997-10-30
DE19747997A DE19747997A1 (de) 1997-10-30 1997-10-30 Taschenfalzwerk und Verfahren zur Registerregelung eines Taschenfalzwerks

Publications (3)

Publication Number Publication Date
EP0913352A2 EP0913352A2 (fr) 1999-05-06
EP0913352A3 EP0913352A3 (fr) 1999-11-17
EP0913352B1 true EP0913352B1 (fr) 2005-07-20

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EP98119757A Expired - Lifetime EP0913352B1 (fr) 1997-10-30 1998-10-22 Plieuse à poches et procédé de contrôle du registre dans une plieuse à poches

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Country Link
US (1) US6086522A (fr)
EP (1) EP0913352B1 (fr)
JP (1) JP4112709B2 (fr)
DE (2) DE19747997A1 (fr)
PT (1) PT913352E (fr)

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US6086522A (en) 2000-07-11
DE19747997A1 (de) 1999-05-12
EP0913352A3 (fr) 1999-11-17
PT913352E (pt) 2005-11-30
JPH11217157A (ja) 1999-08-10
DE59812937D1 (de) 2005-08-25
EP0913352A2 (fr) 1999-05-06
JP4112709B2 (ja) 2008-07-02

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