EP0645242B1 - Method and device for controlling the sheet feeding when starting up a sheet fed printing machine - Google Patents

Method and device for controlling the sheet feeding when starting up a sheet fed printing machine 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
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EP
European Patent Office
Prior art keywords
sheet
vibrator
printing press
feeder
sheets
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Expired - Lifetime
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EP94113595A
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German (de)
French (fr)
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EP0645242A1 (en
Inventor
Horst Klingler
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Manroland AG
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MAN Roland Druckmaschinen AG
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Publication of EP0645242A1 publication Critical patent/EP0645242A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F33/00Indicating, counting, warning, control or safety devices
    • B41F33/16Programming systems for automatic control of sequence of operations
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00Printing
    • Y10S101/32Means 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).

Abstract

A method and a device are described for controlling the sheet feeding when starting up a sheet-processing printing machine having a vibrator inking unit in which the sheets are placed against front lays, their correct position is established and, when the position has been established as correct, the sheet feed is released in a specific setting of the machine. The intention is, in the case of a plurality of starting-up operations, to avoid the first sheet fed-in running into the printing machine in each case at different phases of the vibrator cycle. This is achieved according to the invention in that the first sheet is conveyed up to the feed line, the feeder is then switched off and the sheet feed is then only released again when the vibrator mechanism assumes a specific angular position. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren sowie eine Vorrichtung zur Steuerung des Bogeneinlaufes beim Anfahren einer bogenverarbeitenden Druckmaschine gemäß dem Oberbegriff von Anspruch 1 bzw. 3.3. 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.

Bei Bogenoffsetdruckmaschinen werden die Bogen in einem Anleger gestapelt bereitgestellt und mittels Saugeinrichtungen oder dergleichen von der Oberseite dieses Stapels entnommen und über einen Fördertisch gegen Anlegmarken gefördert. Dort erfolgt ein Ausrichten in Bogenförderrichtung als auch quer dazu. Gleichzeitig wird die korrekte Anlage der Bogenvorderkante durch sensorische Tastmittel - beispielsweise lichtelektrische Fühler - kontrolliert. Solange die Bogen korrekt angelegt werden, werden sie von einem Vorgreifer erfaßt und an einen ersten bogenführenden Zylinder übergeben.In sheet-fed offset printing machines, 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.

Kontnollverfahren bzw. Kontrolleinrichtungen gemäß dem Oberbegriff des Anspruchs 1 bzw. des Anspruchs 4 für den korrekten Bogenlauf im Bereich der Anlegmarken von Bogen-Offsetdruckmaschinen sind beispielsweise aus der DE 4 112 222 A1, der DE 4 001 120 A1 sowie der DE 3 044 643 A1 bekannt. Bei diesen vorbekannten Einrichtungen erfolgt bei einer oder mehreren Winkelstellungen einer Eintourenwelle der Maschine die Abfrage der Bogenlage an der sogenannten Anleglinie. Dabei ergeben sich aber gerade beim Anfahren der Druckmaschine Nachteile, d.h. wenn noch keine Bogen auf dem Anlegtisch vorhanden sind und durch Anschalten des Anlegers ein erster Bogen zu den Anlegmarken (Vordermarken) gefördert werden.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. In these known devices, 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. However, 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.

Es ist allgemein bekannt, daß gerade nach dem Anfahren aber auch nach einem Stopper relativ viel Makulatur entsteht, da sich erst eine stabile Farbverteilung im Farbwerk aufbauen muß. Die Ursache für die entstehende Makulatur beim Wiederanfahren ist dabei in der relativ großen Trägheit des Heberfarbwerks einer Bogenoffsetdruckmaschine zu sehen. Bei nahezu allen Bogen-Offsetdruckmaschinen wird der Heber untersetzt angetrieben, d.h. eine Bewegung des Hebers zwischen der Farbkastenwalze, der ersten Farbwerkswalze (Reiber) und wieder zur Farbkastenwalze zurück erfolgt in mehr als einer Maschinenumdrehung. Üblich sind Hebertakte von 3:1 bzw. 6:1, d.h. auf 3 bzw. 6 Maschinenumdrehungen (Eintourenwelle) erfolgt jeweils eine Heberbewegung. Bei sehr geringem Farbauftrag einer Farbe kann es aber auch erforderlich sein, einen Hebertakt von 72:1 einzustellen.It is generally known that after starting off, too After a stopper, a lot of waste is produced because a stable ink distribution in the inking unit first has to be built up. The reason for the waste that arises when restarting is to be seen in the relatively large inertia of the lifter inking unit of a sheet-fed offset printing press. In almost all sheet-fed offset printing machines, the lifter is driven in a step-down manner, ie a movement of the lifter between the ink fountain roller, the first inking unit roller (grater) and back to the ink fountain roller takes place in more than one machine revolution. Lifting cycles of 3: 1 or 6: 1 are usual, ie a lifting movement takes place on 3 or 6 machine revolutions (single-turn shaft). If a color is applied very little, it may also be necessary to set a lifting cycle of 72: 1.

Wird nun der Einlauf eines ersten Bogens in die Druckmaschine einzig und allein auf die Maschinenstellung, d.h. auf den Winkelwert einer Eintourenwelle synchronisiert freigegeben, so kann es gerade bei sehr hohen Hebertakten vorkommen, daß die Druckmaschine eine Vielzahl von Umdrehungen macht, bevor der Heber Farbe von der Farbkastenwalze zur ersten Reiberwalze transportiert.If the entry of a first sheet into the printing press is solely based on the machine position, i.e. released synchronized to the angular value of a single-speed shaft, it can happen that the printing machine makes a large number of revolutions, especially at very high lifter cycles, before the lifter transports ink from the ink fountain roller to the first friction roller.

Besonders bei mehreren Stoppern bzw. Produktionsunterbrechungen mit entsprechend vielen Wiederanfahrvorgängen sind die Verhältnisse für das Wiedereinlaufen eines ersten Bogens dementsprechend willkürlich. Es ist dann vom Geschick des Druckers durch entsprechendes Gegensteuern abhängig, Makulatur einzusparen. Je nachdem aber wann der Bogeneinlauf bezüglich der Hebergetriebestellung freigegeben wird, kann eine einmal erfolgreich durchgeführte Kompensation bei einem nächsten Wiederanfahrvorgang sogar noch mehr Makulatur verursachen. Insbesondere gilt dies für eine automatische Farbregelanlage, welche zwecks Vermeidung von Anfahrmakulatur einen entsprechenden Regelalgorithmus durchführt.Particularly when there are several stoppers or production interruptions with a correspondingly large number of restart processes, the conditions for the re-entry of a first sheet are accordingly arbitrary. It is then dependent on the skill of the printer through appropriate countermeasures to save waste. However, depending on when the sheet inlet with respect to the lifting gear position is released, a compensation that has been successfully carried out can cause even more waste during the next restart. This applies in particular to an automatic color control system which, in order to avoid start-up waste, carries out a corresponding control algorithm.

Aus dem Stand der Technik sind Druckmaschinen bekannt, bei denen der Heber nicht untersetzt angetrieben ist und somit der Heberzyklus mit der Maschinenumdrehung synchron läuft (US-A-3,301,182). Bei derartigen Druckmaschinen stellt sich das zuvorstehend zitierte Problem nicht.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.

Aus dem Stand der Technik (US-A-3,467,007) sind ferner bogenverarbeitende Druckmaschinen bekannt, bei welchen der Bogeneinlauf für eine bestimmte Anzahl von Maschinenumdrehungen zurückgehalten wird. Dieses Zurückhalten des Bogeneinlaufes geschieht hier zum Voreinfärben des Farbwerkes.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.

Aufgabe der vorliegenden Erfindung ist es somit, ein Verfahren und eine Vorrichtung gemäß dem Oberbegriff von Anspruch 1 derartig weiterzubilden, so daß Makulatur beim Anfahren vermieden werden kann.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.

Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale von Anspruch 1 bzw. von Anspruch 4. Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.This object is achieved by the characterizing features of claim 1 and of claim 4. Further developments of the invention result from the subclaims.

Gemäß der Erfindung ist vorgesehen, daß die Steuerung des Einlaufs eines ersten Bogens beim Anfahren der bogenverarbeitenden Druckmaschine nicht auf eine Eintourenwelle, sondern letztlich auf dem untersetzt angetriebenen Heber synchronisiert wird.According to the invention, it is provided that 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.

Die vorliegende Erfindung vermeidet die weiter oben stehend aufgezählten Nachteile dadurch, daß das Einlaufen eines ersten Bogens in die Druckmaschine bezogen auf eine definiert vorgegebene Winkelstellung des Hebergetriebes durchgeführt wird. Welche Stellung des Hebergetriebes bei einem bestimmten Hebertakt als optimal anzusehen ist, kann durch Druckversuche ermittelt werden und hängt ferner von der Geometrie des Farbwerks als auch von der des Hebergetriebes ab.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.

Des weiteren erfolgt die Erläuterung eines Ausführungsbeispiels der Erfindung anhand der Zeichnungen.Furthermore, an embodiment of the invention is explained with reference to the drawings.

Dabei zeigt:

Fig. 1
das Prinzip einer Bogen-Offsetdruckmaschine mit Anleger,
Fig. 2
ein Diagramm zu den entsprechenden Schaltzyklen beim Anfahren.
It shows:
Fig. 1
the principle of a sheet-fed offset printing machine with feeder,
Fig. 2
a diagram of the corresponding switching cycles when starting.

Fig. 1 zeigt rein prinzipiell das erste Druckwerk einer Bogen-Offsetdruckmaschine 1 mit einem Anleger 2 und einem Anlegetisch 3.1 shows in principle the first printing unit of a sheet-fed offset printing machine 1 with a feeder 2 and a feed table 3.

Mittels nicht dargestellten Fördermitteln werden die Bogen von der Oberseite des Stapels im Anleger 2 entnommen und über den Anlegetisch 3 zu den nicht dargestellten Vordermarken gefördert. Dort erfolgt eine Überwachung der korrekten Anlage der Bogen mittels ein oder mehreren Abtastern 4. Die Transporteinrichtungen des Anlegers 2 sowie die Fördermittel des Anlegetisches 3 werden dabei von dem Antrieb der Bogen-Offsetdruckmaschine 1 getrieben, wozu zwischen Bogen-Offsetdruckmaschine 1 und Anleger 2 eine Antriebswelle 5 nebst einer elektrisch schaltbaren Kupplung 6 vorgesehen ist.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.

Korrekt an die Anlage des Anlegetischs 3 geförderte Bogen werden sodann durch einen Vorgreifer 7 erfaßt und an den ersten bogenführenden Zylinder 8 übergeben. Insbesondere gilt dies für den ersten Bogen bei einem Anfahrvorgang der Bogen-Offsetdruckmaschine 1. Dann befinden sich beispielsweise auf dem Anlegetisch 3 keine Bogen, diese müssen erst von dem Bogenstapel gefördert werden.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.

Gemäß der Erfindung erfolgt nun bei einem Anfahrvorgang ein Fördern von Bogen über den Anlegetisch 3 solange, bis durch die Abtaster 4 die korrekte Anlage eines ersten Bogens an der Anlage festgestellt wird. Sodann erfolgt ein Abschalten des Anlegerantriebs durch Ansteuern der Kupplung 6. Der Antrieb der Bogen-Offsetdruckmaschine bleibt dabei weiter angeschaltet. Der Vorgreifer 7 ist gesperrt, d.h. die Greifer erfassen den korrekt anliegenden Bogen nicht.According to the invention, 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.

Die Bogen-Offsetdruckmaschine 1 weist einen Winkelgeber 9 auf, der an einer eintourigen Welle angebracht ist. Dies kann beispielsweise die Achse des Plattenzylinders oder die Antriebswelle des Kurventriebes des Vorgreifers 7 sein. Die Signale des Winkelgebers 9 werden einer als Rechner ausgebildeten Steuerung 10 zugeleitet, welche ebenfalls mit den Abtastern 4, der Kupplung 6 sowie mit den das Sperren bzw. Entsperren des Vorgreifers 7 bewirkenden Stellmitteln in Wirkverbindung steht. Über eine Eingabe 11 ist der Steuerung 10 die Information über den aktuellen Hebertakt ersten Druckwerkes der Bogen-Offsetdruckmaschine 1 zuführbar. Es ist in einfacher und vorteilhafter Weise dadurch zu bewerkstelligen, daß die den Hebertakt verändernden Stellmittel am Hebergetriebe entsprechende Signale an die Steuerung 10 liefern.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.

In der Steuerung 10 erfolgt nicht nur ein Auswerten der Signale des Winkelgebers 9 bezüglich einer Umdrehung sondern über eine Vielzahl von Umdrehungen hinaus. In der Steuerung 10 ist für eine Vielzahl von den frei wählbaren Hebertakten jeweils ein Winkelwert abgespeichert, bei welchem nach festgestellter korrekter Anlage eines ersten Bogens an der Anlage die Vorgreifersperrung aufzuheben ist.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.

Nach dem von der Steuerung 10 ein erster, korrekt an den Vordermarken anliegender Bogen festgestellt ist und daraufhin der Anleger 2 abgeschaltet wurde, erfolgt nun durch die Steuerung 10 ein Vergleich der aktuellen Winkelwerte des Winkelgebers 9 mit dem entsprechend vorgegebenen Sollwert. Wenn nun die Bogen-Offsetdruckmaschine 1 eine bestimmte Anzahl von Umdrehungen gemacht hat, also der in Fig. 1 rein symbolisch dargestellte Heber eine bestimmte Arbeitsstellung eingenommen hat, erfolgt das Entsperren des Vorgreifers und der erste anliegende Bogen wird erfaßt und sodann an den ersten bogenführenden Zylinder 8 übergeben. Die Winkelstellung unter welcher die Steuerung 10 in Abhängigkeit der korrekten Anlage eines ersten Bogens das Entsperren des Vorgreifers 7 als auch das Wiederzuschalten des Anlegers durch Ansteuern der Kupplung 6 auslöst, richtet sich dabei selbstverständlich auch nach der Geometrie und Ausbildung des Antriebs des Vorgreifers 7 des Hebergetriebes sowie der das Druckan- und Druckabstellen der Druckwerkszylinder bewirkenden Getriebe. Erfindungswesentlich ist hierbei lediglich, daß ein erster korrekt anliegender Bogen beim Anfahren beliebig bezüglich des Stellung des Hebergetriebes festgestellt werden kann, der Anleger 2 sowie der Vorgreifer 7 jedoch solange gesperrt werden, bis eine bestimmte, vorgegebene Winkelstellung des Hebergetriebes erreicht ist. Durch die erfindungsgemäße Verfahrensweise der Steuerung 10 und das damit verbundene entsprechende Ansteuern der Kupplung 6 des Anlegers 2 sowie das Sperren/Entsperren des Vorgreifers 7 ist daher stets gewährleistet, das insbesondere bei sehr hoch gewählten Hebertakten (große Untersetzung der Kurvenscheibe des Hebers) die Bogen nicht beliebig bezüglich der Heberstellung einlaufen.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. Due to the method of control 10 according to the invention and the associated actuation of the clutch 6 of the feeder 2 and the locking / unlocking of the pre-gripper 7 is therefore always guaranteed that, particularly with very high lift cycles (large reduction of the cam disk of the lifter), the sheets will not run in arbitrarily with respect to the lift position.

In Fig. 2 ist in Form von einem Ablaufdiagramm die erfindungsgemäße Synchronisation des Bogeneinlaufs auf dem Hebertakt noch einmal dargestellt. In der ersten Zeile dieses Diagramms ist der sogenannte Maschinenwinkel MW aufgezeichnet. Die angegebenen Zahlen bedeuten die Anzahl der Umdrehungen, die die Druckmaschine gemacht hat. Die Angaben sind rein prinzipiell zu verstehen.In 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.

In der ersten Zeile unter dem Maschinenwinkel MW ist der Schaltzustand der Kupplung 6 des Anlegers 2 in Fig. 1 dargestellt. Dieser Schaltzustand ist mit A bezeichnet und kann die angegebenen Zustände 1 (ein) und 2 (aus) annehmen. In der darunter befindlichen Zeile ist der Schaltzustand des Vorgreifers 7 dargestellt. Dieser nimmt die Schaltzustände 1 (gesperrt) bzw. 0 (frei) ein, d.h. der Vorgreifer 7 vermag die Bogen nicht zu erfassen bzw. zu greifen.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.

In der darunter befindlichen Zeile ist das Ergebnis der Abfrage des Abtasters 4 wiedergegeben, also ob ein Bogen an den Vordermarken anliegt. Diese Abfrage kann die Signalzustände 0 (kein Bogen) bzw. 1 (Bogen liegt korrekt an) einnehmen.In the line below, 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).

In der darunter befindlichen Zeile ist aufgetragen, ob Bogen in die Maschine laufen oder nicht. Diese Zustandsangabe ergibt hierbei die Level 0 (kein Bogen in der Maschine) bzw. 1 (Bogen in Maschine).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).

In der letzten Zeile ist die Schaltmöglichkeit für den Hebertakt dargestellt, wobei auf dem Level 0 das Schalten des Hebers nicht möglich ist, auf dem Level 1 das Zuschalten des Hebers möglich ist.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.

In diesem Beispiel sei angenommen, daß bei 0 der Antrieb der Druckmaschine eingeschaltet wird. Kurz vor der zweiten Umdrehung wird die Kupplung 6 des Anlegers 2 zugeschaltet, d.h. der Anleger 2 fördert nun Bogen auf den Anlegetisch 3. Gleichzeitig wird der Vorgreifer 7 von dem gesperrten Zustand 1 in den freien Zustand 0 geschaltet, d.h. die Greifer werden nun einen anliegenden Bogen erfassen. Kurz vor der vierten Umdrehung zeigt das Signal vom Abtaster 4, daß ein Bogen an den Vordermarken korrekt anliegt. Das Signal wechselt von 0 auf 1. Wie dargestellt wird durch-die Steuerung 10 sodann die Kupplung 6 des Anlegers 2 ausgerückt woraufhin auch wieder der Vorgreifer gesperrt ist (Zustand 1). Im dargestellten Beispiel kann der Hebertakt zwischen der zweiten und dritten zwischen der fünften und sechsten und dann wiederum zwischen der achten und neunten Umdrehung der Druckmaschine zugeschaltet werden. Dies zeigt in Fig. 2 die Zeile Hebertakt HT. In diesem Ausführungsbeispiel beträgt der Hebertakt somit 3:1.In this example it is assumed that the drive of the printing press is switched on at 0. Shortly before the second turn the clutch 6 of the feeder 2 is switched on, ie the feeder 2 now conveys sheets onto the feed table 3. At the same time, 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. Shortly before the fourth rotation, the signal from scanner 4 shows that a sheet is correctly applied to the front marks. The signal changes from 0 to 1. As shown, the control 10 then disengages the clutch 6 of the feeder 2, whereupon the pre-gripper is also locked (state 1). In the example shown, 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.

Nachdem nun ein Bogen an den Vordermarken BV korrekt anliegend festgestellt und die Kupplung 6 sowie der Vorgreifer 7 ausgelöst bzw. gesperrt wurden (Zeile A bzw. V) erfolgt nach fast mehr als einer Umdrehung erst das Wiedereinrücken der Kupplung 6 des Anlegers 2 sowie das Freigeben der Sperre des Vorgreifers 7 (A, V). In diesem Ausführungsbeispiel würde also ein Bogen immer erst kurz vor der Schaltmöglichkeit des Hebers in die Maschine einlaufen. Durch die Synchronisierpause SP wird somit vermieden, daß der Bogen ein bzw. zwei Umdrehungen vor diesem Zustand einläuft.Now that a bow has been correctly positioned against the front marks BV and the clutch 6 and the pre-gripper 7 have been triggered or blocked (lines A and V), after almost more than one turn, the clutch 6 of the feeder 2 is re-engaged and released the lock of the forerunner 7 (A, V). In this exemplary embodiment, a sheet would only run into the machine shortly before the lifting device could be switched. The synchronization pause SP prevents the sheet from running in one or two revolutions before this state.

Statt einen Winkelgeber 9 kann auch direkt am Heberantrieb ein Sensor angebracht sein, der beispielsweise die Stellung der das An- bzw. Abstellen des Hebers bewirkenden Schaltklinke erfaßt (Kurventrieb mit Rollenhebel und Schaltklinke - Sensor an Schaltklinke).Instead of an angle encoder 9, 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).

BezugszeichenlisteReference list

11
Bogen-OffsetdruckmaschineSheet offset printing machine
22nd
AnlegerInvestors
33rd
AnlegetischFeed table
44th
AbtasterScanner
55
Antriebswelledrive shaft
66
Kupplungclutch
77
VorgreiferForerunner
88th
bogenführender Zylinderbow-guiding cylinder
99
WinkelgeberAngle encoder
1010th
Steuerungcontrol
1111
Eingabeinput
MWMW
MaschinenwinkelMachine angle
AA
Schaltzustand der Kupplung 6Switching status of the clutch 6
VV
Schaltzustand Vorgreifer 7Switching status of pre-gripper 7
BVBV
Bogen an VordermarkeBow on front mark
BMBM
Bogen in MaschineSheet in machine
HTHT
HebertaktLift stroke
SPSP
SynchronisierpauseSynchronization pause

Claims (6)

  1. Method for controlling the running in of a sheet on starting up a sheet treating printing press with a vibrator inking unit which has a vibrator driven with reduction, wherein the cycle of the vibrator takes place over more than one press rotation, and in which sheets are laid on top of a feeder table (3) against front lays, their laying up checked and with the position detected as correct the sheet run-in is released at a given angular position of the printing press (1), characterised in that sheets are fed over the feeder table (3) so long until a first sheet is detected as lying correctly against the front lays, that thereafter the sheet running in is locked and the feed of sheets over the feeder table (3) is stopped, and that the running in of a first sheet as well as the feeding of further sheets over the feeder table (3) is carried out with reference to a defined predetermined angular position of the vibrator drive.
  2. Process according to Claim 1, characterised in that the angular position of the printing press (1) and from this also the angular position of the vibrator drive is determined in digital form.
  3. Process according to Claim 1, characterised in that the angular position of the vibrator drive is detected by means of a sensor.
  4. Device for carrying out the method according to Claim 1 in a printing press (1) with vibrator inking unit, wherein this has a vibrator driven with reduction, whereby the cycle of the vibrator occurs over more than one machine rotation, with a feeder (2) driveable from the main drive of the printing press (1) via a clutch (6), by means of which sheets can be fed over a feeder table (3) to front lays, as well as a control (10) which is operatively connected with sensors (4) installed in the region of the front lays and by means of which the clutch (6) of the feeder (2) as well as a pre-gripper effecting the sheet run-in is controllable, characterised in that by means of the control (10), the running in of a first sheet into the sheet offset printing press (1) can be freed by switching the clutch (6) as well as the pre-gripper (7) synchronised to a predetermined angular position of the vibrator drive.
  5. Device according to Claim 4, characterised in that the sheet offset printing press (1) has an angular sensor (9) by means of which the phase of the vibrator drive can be determined in the control (10).
  6. Device according to Claim 4, characterised in that a sensor which is operatively connected to the control (10) is installed on the vibrator drive.
EP94113595A 1993-09-29 1994-08-31 Method and device for controlling the sheet feeding when starting up a sheet fed printing machine Expired - Lifetime EP0645242B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4333071A DE4333071C1 (en) 1993-09-29 1993-09-29 Method and device for controlling the sheet inlet when starting a sheet-processing printing machine
DE4333071 1993-09-29

Publications (2)

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

Family

ID=6498896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94113595A Expired - Lifetime EP0645242B1 (en) 1993-09-29 1994-08-31 Method and device for controlling the sheet feeding when starting up a sheet fed printing machine

Country Status (5)

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

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19510082C2 (en) * 1995-03-20 1997-07-17 Roland Man Druckmasch Method and device for controlling the sheet feed in a sheet-fed offset printing machine
DE19613360A1 (en) * 1996-04-03 1997-10-09 Heidelberger Druckmasch Ag Process for controlling the lifting roller in printing machines
DE19639134C2 (en) * 1996-09-24 1999-03-25 Roland Man Druckmasch Procedure for starting / restarting the production run
DE19819651A1 (en) * 1998-05-02 1999-11-04 Roland Man Druckmasch Process for starting up production in a sheet-fed printing press and corresponding control
DE10111070A1 (en) 2000-04-03 2001-10-04 Heidelberger Druckmasch Ag Printing machine has sheet feed comprising pregripper driven by lever mechanism from which it can be disconnected
US6526888B2 (en) * 2000-12-01 2003-03-04 Heidelberger Druckmaschinen Ag Reduced vibration printing press and method
DE102007046106B4 (en) * 2007-09-27 2020-08-27 Koenig & Bauer Ag Method and device for synchronizing periodic feed movements of an ink or dampening solution lifter
DE102007057734A1 (en) * 2007-11-30 2009-06-04 Koenig & Bauer Aktiengesellschaft Printing quality improving method for sheet-fed rotary printing press, involves performing switching of sheet conveyance with consideration of determined number of sheet cycles in such manner that sheet passes through printing unit

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE89115C (en) *
DD89115A (en) *
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 (en) * 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 (en) * 1980-02-29 1982-04-28 Volker Eichler DEVICE FOR CONTROLLING A PRINTING MACHINE
DD212475B1 (en) * 1982-12-20 1989-03-01 Arndt Jentzsch LOCKING DEVICE FOR A COLOR PREPARED IN COLORING WORKS FOR PRINTING MACHINES
DE3707695A1 (en) * 1987-03-11 1988-09-22 Heidelberger Druckmasch Ag METHOD FOR DEFINED PRODUCTION OF A COLOR DISTRIBUTION CLOSE TO CONTINUOUS PRINTING IN THE INKING UNIT OF ROTATIONAL PRINTING MACHINES
DE4001120C2 (en) * 1990-01-17 1994-05-26 Heidelberger Druckmasch Ag Device for regulating the arrival of sheets in sheet-processing machines, in particular printing machines
JPH0437545A (en) * 1990-06-01 1992-02-07 Komori Corp Cylinder setting control of intaglio printer and its device
DE4112222C2 (en) * 1991-04-15 1994-12-01 Roland Man Druckmasch Device for controlling sheet travel in the area of the application marks of sheet-fed offset printing machines

Also Published As

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

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