EP0645242B1 - Méthode et dispositif pour commander l'introduction d'une feuille au démarrage d'une machine à imprimer des feuilles - Google Patents

Méthode et dispositif pour commander l'introduction d'une feuille au démarrage d'une machine à imprimer des feuilles Download PDF

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Publication number
EP0645242B1
EP0645242B1 EP94113595A EP94113595A EP0645242B1 EP 0645242 B1 EP0645242 B1 EP 0645242B1 EP 94113595 A EP94113595 A EP 94113595A EP 94113595 A EP94113595 A EP 94113595A EP 0645242 B1 EP0645242 B1 EP 0645242B1
Authority
EP
European Patent Office
Prior art keywords
sheet
vibrator
printing press
feeder
sheets
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
EP94113595A
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German (de)
English (en)
Other versions
EP0645242A1 (fr
Inventor
Horst Klingler
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0645242A1 publication Critical patent/EP0645242A1/fr
Application granted granted Critical
Publication of EP0645242B1 publication Critical patent/EP0645242B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/16—Programming systems for automatic control of sequence of operations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/32—Means to vary the time of contact of one or more rollers in an ink train

Definitions

  • the invention relates to a method and a device for controlling the sheet inlet when starting a sheet-processing printing machine according to the preamble of claim 1 and 3 respectively.
  • the sheets are provided in a stack in a feeder and are removed from the top of this stack by means of suction devices or the like and conveyed against feed marks via a conveyor table. There is an alignment in the sheet conveying direction as well as transverse to it. At the same time, the correct positioning of the leading edge of the sheet is checked by means of sensor-like sensing means - for example photoelectric sensors. As long as the sheets are correctly applied, they are gripped by a pre-gripper and transferred to a first sheet-guiding cylinder.
  • Control methods and control devices according to the preamble of claim 1 and claim 4 for the correct sheet travel in the area of the application marks of sheet-fed offset printing machines are, for example, from DE 4 112 222 A1, DE 4 001 120 A1 and DE 3 044 643 A1 known.
  • the arch position is queried at the so-called contact line at one or more angular positions of a single-turn shaft of the machine.
  • there are disadvantages when starting up the printing machine i.e. if there are no sheets on the feed table and a first sheet is conveyed to the feed marks (front marks) by switching on the feeder.
  • Printing machines are known from the prior art in which the lifter is not driven in a step-down manner and thus the lifter cycle runs synchronously with the machine revolution (US Pat. No. 3,301,182). The problem cited above does not arise with such printing machines.
  • Sheet processing printing machines are also known from the prior art (US Pat. No. 3,467,007), in which the sheet inlet is retained for a certain number of machine revolutions. This retraction of the sheet inlet occurs here for pre-inking the inking unit.
  • the object of the present invention is thus to provide a method and a device according to the preamble of claim 1 further training so that waste can be avoided when starting.
  • the control of the infeed of a first sheet when the sheet-processing printing machine starts up is not synchronized with a single-speed shaft, but ultimately with the step-down driven jack.
  • the present invention avoids the disadvantages listed above in that the entry of a first sheet into the printing press is carried out in relation to a defined, predetermined angular position of the lifting gear. Which position of the lifting gear can be regarded as optimal for a certain lifting cycle can be determined by pressure tests and also depends on the geometry of the inking unit and on that of the lifting gear.
  • FIG. 1 shows in principle the first printing unit of a sheet-fed offset printing machine 1 with a feeder 2 and a feed table 3.
  • the sheets are removed from the top of the stack in the feeder 2 by means of conveying means, not shown, and conveyed over the feed table 3 to the front marks, not shown. There, the correct installation of the sheets is monitored by means of one or more scanners 4.
  • the transport devices of the feeder 2 and the conveying means of the feed table 3 are driven by the drive of the sheet-fed offset printing press 1, for which purpose a drive shaft between sheet-fed offset printing press 1 and feeder 2 5 is provided in addition to an electrically switchable clutch 6.
  • Correctly conveyed sheets to the system of the feed table 3 are then gripped by a pre-gripper 7 and transferred to the first sheet-guiding cylinder 8. This applies in particular to the first sheet during a start-up process of the sheet-fed offset printing press 1. Then, for example, there are no sheets on the feed table 3, these must first be conveyed by the sheet stack.
  • sheets are now conveyed over the feed table 3 during a start-up process until the scanner 4 detects the correct placement of a first sheet on the installation.
  • the feeder drive is then switched off by actuating the clutch 6.
  • the drive of the sheet-fed offset printing press remains switched on.
  • the pre-gripper 7 is locked, i.e. the grippers do not grasp the correctly fitting sheet.
  • the sheet-fed offset printing press 1 has an angle encoder 9 which is attached to a single-speed shaft. This can be, for example, the axis of the plate cylinder or the drive shaft of the cam drive of the pre-gripper 7.
  • the signals from the angle encoder 9 are fed to a controller 10 designed as a computer, which is also operatively connected to the scanners 4, the coupling 6 and the actuating means which lock or unlock the pre-gripper 7.
  • the input 10 can be used to supply the controller 10 with information about the current lifting cycle of the first printing unit of the sheet-fed offset printing press 1. It is in to be accomplished in a simple and advantageous manner in that the actuating means on the lifter gear changing the lifter cycle deliver corresponding signals to the controller 10.
  • the controller 10 not only evaluates the signals of the angle encoder 9 with respect to one revolution but also over a large number of revolutions. An angle value is stored in the control 10 for a large number of the freely selectable lifter clocks, at which the pre-gripper lock is to be released after a correct application of a first sheet to the system has been determined.
  • the controller 10 After the controller 10 has determined a first sheet that is correctly in contact with the front marks and then the feeder 2 has been switched off, the controller 10 now compares the current angle values of the angle transmitter 9 with the corresponding predetermined target value. If the sheet-fed offset printing machine 1 has now made a certain number of revolutions, that is to say the lifter, which is shown purely symbolically in FIG. 1, has assumed a certain working position, the pre-gripper is unlocked and the first sheet lying against it is detected and then on the first sheet-guiding cylinder 8 passed.
  • the angular position at which the control 10 triggers the unlocking of the pre-gripper 7 and the re-engagement of the feeder by actuating the clutch 6, depending on the correct installation of a first sheet is of course also based on the geometry and design of the drive of the pre-gripper 7 of the lifting gear and the gear unit causing the printing unit cylinders to be switched on and off. What is essential to the invention is only that a first correctly fitting sheet can be ascertained when starting with respect to the position of the lifting gear, but the feeder 2 and the pre-gripper 7 are blocked until a certain predetermined angular position of the lifting gear is reached.
  • Fig. 2 the synchronization of the sheet inlet on the lifter cycle according to the invention is shown again in the form of a flow chart.
  • the so-called machine angle MW is recorded in the first line of this diagram.
  • the numbers given indicate the number of revolutions the press has made. The information is to be understood in principle.
  • the switching state of clutch 6 of feeder 2 is shown in FIG. 1 in the first line below machine angle MW.
  • This switching state is designated A and can assume the specified states 1 (on) and 2 (off).
  • the switching state of the pre-gripper 7 is shown in the line below. This takes on switching states 1 (blocked) or 0 (free), i.e. the pre-gripper 7 is unable to grasp or grip the sheets.
  • the result of the query of the scanner 4 is reproduced, that is, whether there is a sheet on the front marks.
  • This query can assume the signal states 0 (no sheet) or 1 (sheet is correctly applied).
  • the line below shows whether sheets run into the machine or not. This status information results in level 0 (no sheet in the machine) or 1 (sheet in machine).
  • the last line shows the switching option for the lifter cycle, whereby on level 0 it is not possible to switch the lifter, on level 1 it is possible to switch on the lifter.
  • the drive of the printing press is switched on at 0.
  • the clutch 6 of the feeder 2 is switched on, ie the feeder 2 now conveys sheets onto the feed table 3.
  • the pre-gripper 7 is switched from the locked state 1 to the free state 0, that is to say the grippers will now grip an adjacent sheet.
  • the signal from scanner 4 shows that a sheet is correctly applied to the front marks. The signal changes from 0 to 1.
  • the control 10 then disengages the clutch 6 of the feeder 2, whereupon the pre-gripper is also locked (state 1).
  • the lifting stroke between the second and third between the fifth and sixth and then again between the eighth and ninth revolutions of the printing press can be activated. This is shown in Fig. 2, the line lifter HT. In this embodiment, the lifter cycle is 3: 1.
  • a sensor can also be attached directly to the lifter drive, which detects, for example, the position of the switching pawl which causes the lifter to be switched on and off (cam drive with roller lever and switching pawl - sensor on switching pawl).

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Claims (6)

  1. Procédé pour commander l'introduction d'une feuille au démarrage d'une machine d'impression traitant des feuilles, laquelle comporte une unité d'encrage à preneur, qui présente un preneur entraîné de façon démultipliée, grâce à quoi le cycle du preneur est effectué sur plus d'un tour de machine, et dans lequel la feuille s'applique contre des repères avant sur une table de marge (3), l'application étant contrôlée et étant libérée pour une position angulaire déterminée de la machine d'impression (1) lorsque la position d'introduction de la feuille est déterminée comme correcte,
    caractérisé en ce que des feuilles sont transportées sur la table de marge (3) jusqu'à ce qu'une première feuille soit déterminée comme s'appuyant de façon correcte contre les repères avant, en ce que, alors, l'introduction des feuilles est arrêtée et le transport des feuilles sur la table de marge (3) est stoppé, et en ce que l'introduction d'une première feuille ainsi que le transport d'autres feuilles sur la table de marge (3) sont effectués relativement à une position angulaire prédéterminée définie de l'entraînement du preneur.
  2. Procédé selon la revendication 1,
    caractérisé en ce que la position angulaire de la machine d'impression (1) et, de plus également, la position angulaire de l'entraînement du preneur sont détectées sous forme numérique.
  3. Procédé selon la revendication 1,
    caractérisé en ce que la position angulaire de l'entraînement du preneur est détectée par capteur.
  4. Dispositif pour la mise en oeuvre du procédé selon la revendication 1, pour une machine d'impression (1) présentant une unité d'encrage à preneur, celle-ci comportant un preneur entraîné de façon démultipliée, grâce à quoi le cycle du preneur est effectué sur plus d'un tour de machine, comportant un margeur (2) pouvant être entraîné par l'entraînement principal de la machine d'impression (1) par l'intermédiaire d'un couplage (6), à travers lequel des feuilles peuvent être transportées sur une table de marge (3) vers des repères avant, ainsi qu'une commande (10), laquelle est en liaison active avec des palpeurs (4) agencés dans la zone des repères avant et grâce à laquelle le couplage (6) du margeur (2) ainsi qu'un moyen de prise préalable (7) permettant l'introduction des feuilles peuvent être commandés,
    caractérisé en ce que l'introduction d'une première feuille dans la machine d'impression offset à feuilles (1) peut être libérée par la commande (10) par commutation du couplage (6) ainsi que du moyen de prise préalable (7), de façon synchronisée, à une position angulaire prédéfinie de l'entraînement du preneur.
  5. Dispositif selon la revendication 4,
    caractérisé en ce que la machine d'impression offset à feuilles (1) présente un capteur angulaire (9) grâce auquel la phase du cycle du preneur peut être détectée dans la commande (10).
  6. Dispositif selon la revendication 4,
    caractérisé en ce qu'un capteur en liaison active avec la commande (10) est agencé sur l'entraînement du preneur.
EP94113595A 1993-09-29 1994-08-31 Méthode et dispositif pour commander l'introduction d'une feuille au démarrage d'une machine à imprimer des feuilles Expired - Lifetime EP0645242B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4333071A DE4333071C1 (de) 1993-09-29 1993-09-29 Verfahren und Vorrichtung zur Steuerung des Bogeneinlaufes beim Anfahren einer bogenverarbeitenden Druckmaschine
DE4333071 1993-09-29

Publications (2)

Publication Number Publication Date
EP0645242A1 EP0645242A1 (fr) 1995-03-29
EP0645242B1 true EP0645242B1 (fr) 1996-05-29

Family

ID=6498896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94113595A Expired - Lifetime EP0645242B1 (fr) 1993-09-29 1994-08-31 Méthode et dispositif pour commander l'introduction d'une feuille au démarrage d'une machine à imprimer des feuilles

Country Status (5)

Country Link
US (1) US5533448A (fr)
EP (1) EP0645242B1 (fr)
JP (1) JP3121994B2 (fr)
AT (1) ATE138607T1 (fr)
DE (2) DE4333071C1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19510082C2 (de) * 1995-03-20 1997-07-17 Roland Man Druckmasch Verfahren und Vorrichtung zur Steuerung der Bogenzufuhr bei einer bogenverarbeitenden Offsetdruckmaschine
DE19613360A1 (de) * 1996-04-03 1997-10-09 Heidelberger Druckmasch Ag Verfahren zur Steuerung der Hebwalze in Druckmaschinen
DE19639134C2 (de) * 1996-09-24 1999-03-25 Roland Man Druckmasch Verfahren zum Anfahren/Wiederanfahren des Fortdruckes
DE19819651A1 (de) * 1998-05-02 1999-11-04 Roland Man Druckmasch Verfahren zum Anfahren des Fortdruckes bei einer bogenverarbeitenden Druckmaschine sowie entsprechende Steuerung
EP1142710B1 (fr) * 2000-04-03 2007-11-28 Heidelberger Druckmaschinen Aktiengesellschaft Machines d'impression à feuilles et procédé pour faire marcher une machine d'impression à feuilles
US6526888B2 (en) * 2000-12-01 2003-03-04 Heidelberger Druckmaschinen Ag Reduced vibration printing press and method
DE102007046106B4 (de) * 2007-09-27 2020-08-27 Koenig & Bauer Ag Verfahren und Vorrichtung zur Synchronisierung periodischer Zustellbewegungen eines Farb- oder Feuchtmittelhebers
DE102007057734A1 (de) * 2007-11-30 2009-06-04 Koenig & Bauer Aktiengesellschaft Verfahren und Vorrichtung zur Verbesserung der Druckqualität eines Offsetdruckwerkes

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD89115A (fr) *
DE89115C (fr) *
US3056346A (en) * 1960-01-14 1962-10-02 Addressograph Multigraph Printing machine
US3195456A (en) * 1963-11-18 1965-07-20 Cutler Hammer Inc Timing and sequencing control system for sheet fed rotary printing press
US3301182A (en) * 1964-12-10 1967-01-31 Fairchild Camera Instr Co Automatic ink ductor control for printing presses
US3467007A (en) * 1966-03-22 1969-09-16 Harris Intertype Corp Electrical controls for a multiple couple printing press
FR2088149B1 (fr) * 1970-05-22 1974-05-24 Philips France
US3818827A (en) * 1971-11-09 1974-06-25 Polygraph Leipzig Control arrangement for multiple color printing machines
DD154866A3 (de) * 1980-02-29 1982-04-28 Volker Eichler Einrichtung zur steuerung einer druckmaschine
DD212475B1 (de) * 1982-12-20 1989-03-01 Arndt Jentzsch Sperreinrichtung fuer einen farbheber in farbwerken fuer druckmaschinen
DE3707695A1 (de) * 1987-03-11 1988-09-22 Heidelberger Druckmasch Ag Verfahren zur definierten erzeugung einer dem fortdruck nahen farbverteilung im farbwerk von rotationsdruckmaschinen
DE4001120C2 (de) * 1990-01-17 1994-05-26 Heidelberger Druckmasch Ag Vorrichtung zur Regelung der Bogenankunft bei bogenverarbeitenden Maschinen, insbesondere Druckmaschinen
JPH0437545A (ja) * 1990-06-01 1992-02-07 Komori Corp 凹版印刷機の胴入れ制御方法及びその装置
DE4112222C2 (de) * 1991-04-15 1994-12-01 Roland Man Druckmasch Vorrichtung zur Kontrolle des Bogenlaufes im Bereich der Anlegmarken von Bogen-Offsetdruckmaschinen

Also Published As

Publication number Publication date
DE4333071C1 (de) 1995-02-09
EP0645242A1 (fr) 1995-03-29
ATE138607T1 (de) 1996-06-15
US5533448A (en) 1996-07-09
JPH07164618A (ja) 1995-06-27
JP3121994B2 (ja) 2001-01-09
DE59400312D1 (de) 1996-07-04

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