EP0727374A1 - Method for controlling the sheet feeding - Google Patents

Method for controlling the sheet feeding Download PDF

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Publication number
EP0727374A1
EP0727374A1 EP96101564A EP96101564A EP0727374A1 EP 0727374 A1 EP0727374 A1 EP 0727374A1 EP 96101564 A EP96101564 A EP 96101564A EP 96101564 A EP96101564 A EP 96101564A EP 0727374 A1 EP0727374 A1 EP 0727374A1
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EP
European Patent Office
Prior art keywords
sheet
sheets
double
machine
feed
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Granted
Application number
EP96101564A
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German (de)
French (fr)
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EP0727374B1 (en
Inventor
Joachim Müller
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Manroland AG
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MAN Roland Druckmaschinen AG
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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
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/10—Tripping devices or stop-motions for starting or stopping operation of damping or inking units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
    • B65H7/12—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to double feed or separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/11—Length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/30—Numbers, e.g. of windings or rotations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/52—Defective operating conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/52—Defective operating conditions
    • B65H2511/524—Multiple articles, e.g. double feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/40—Movement
    • B65H2513/42—Route, path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/50—Timing
    • B65H2513/512—Starting; Stopping

Definitions

  • the invention relates to a method for controlling the sheet feed according to the preamble of claim 1.
  • the sheets are removed from a stack of feeders, transported to the system via a conveyor table (suction belt table), aligned there and then gripped by a pre-gripper and transferred to the first printing unit.
  • a conveyor table suction belt table
  • sensoric monitoring of the sheet travel is carried out at various points on the conveying path described above.
  • a control device for feeding sheets which is arranged directly in the conveying direction of the sheets behind the stack of feeders and is used to detect double sheets, is known from DE 2 930 270 C2.
  • This device has one Driven transport roller and a feeler roller mounted movably with respect to this, the sheets being conveyed between these rollers.
  • Another disadvantage of stopping the sheet feed immediately after detecting a double or missing sheet directly after the sheet feed behind the stack of feeders is that the printer has to clear the entire sheet scale - between the system and the transport roller about 5-7 sheets - from the feed table and also the Stopper causer, i.e. has to remove the double sheet. Thin and sensitive substrates in particular are often damaged during this removal, so that waste is also produced here.
  • the object of the present invention is to design a method according to the preamble of claim 1 in such a way that the disadvantages mentioned above can be avoided.
  • the sheet lying in front of this double or missing sheet is fed into the printing press and the system is only locked when the last one is still correctly positioned sheets have entered the machine before the double or missing sheet. So it is exploited that there are about 5-7 sheets on the conveyor table in front of the double or missing sheet in the scale located and can therefore still be correctly created and printed.
  • the double or missing sheet which triggers the stopper can then be removed by the printer at the system, the sheets following the double or missing sheet usually being correctly in the scale again, so that the printer only has a minimal number, in particular only the double - or missing sheet itself must be removed.
  • the ink or dampening solution supply can in particular in the first and second printing units a predetermined number of revolutions Of the last sheet that is correctly attached to the machine. There is thus still a decrease in ink from the blanket and printing plate, so that an excessive amount of ink, which leads to over-coloring of the first sheets when restarted, is avoided.
  • FIG. 1 shows the feeder 1 and the first printing unit 5 of a sheetfed offset printing machine.
  • transport means which are not shown and are known per se, sheets are removed from the top of a feeder stack and conveyed via a transport roller 7 onto a conveyor table 2 designed as a suction belt table.
  • the sheets 6 on the upper side of the conveyor table 2 are then conveyed by suction belts in a shingled manner to the system 3, where after an alignment process with a correctly determined position, the sheet is gripped by a pre-gripper 4 and accelerated to the peripheral speed of the cylinders in the printing unit 5.
  • a sheet control 8 Arranged in the conveying direction of the sheets 6 in the area of the transport roller 7 of the feeder 1 is a sheet control 8 which interacts in particular with the transport roller 7 and which checks in particular the correct sheet separation with regard to double sheets.
  • This sheet control 8 is connected to a control 9 explained below. If several sheet controls 8 are arranged over the format width or over the length of the transport roller 7, inclined sheets can also be detected at this point.
  • the sheet located between the transport roller 7 and the sheet control 8 is a double sheet.
  • the sheet control 8 sends a corresponding signal to the control 9. From the format length of the sheets 6, the intended shingling and the distance between the system 3 and the transport roller 7, it is now easy to calculate how many sheets 6 can still enter the first printing unit 5 of the machine via the feed table 2. In the example shown, this was six sheets.
  • the sheet separation and conveying means of the feeder 1 (not shown here) are switched off via the controller 9.
  • the controller 9 is in operative connection with these means, not shown here.
  • the six sheets 6 lying in front of the double sheet on the conveyor table 2 are now fed into the printing unit 5 by the pre-gripper 4 until the double sheet has reached the system 3, whereupon the pre-gripper 4 and the system 3 are blocked.
  • the control 9 is in operative connection with the system 3 and the pre-gripper 4.
  • the control 9 is also in active connection with an incremental or absolute angle encoder attached to a single-speed shaft of the printing unit 5, so that the signals still allow the number of into the machine can be determined via the machine revolutions.
  • the controller 9 is also operatively connected to switching means, not shown, for interrupting the ink supply in an inking unit 11 of the printing unit 5, which is shown here symbolically.
  • the switching means not shown, in particular cause the inking rollers to be turned on and off relative to a plate cylinder, and to lock or unlock the movement of an ink lifter.
  • the controller 9 is not actively connected to Switching means shown to turn the blanket cylinder 12 on and off compared to the double-sized impression cylinder and the plate cylinder above.
  • the ink supply of the inking unit is interrupted 11.
  • the blanket cylinder 12 is switched off from the impression cylinder and also from the plate cylinder lying above it. For example, it can be provided that the last sheet preceding the double sheet is still printed by the blanket cylinder 12, the ink supply of the inking unit 11 to the plate of the plate cylinder lying above it being interrupted.
  • the controller 9 is operatively connected to a feeder coupling 10, by means of which feeder 1 driven by the drive of the printing press can be stopped. Switching off the feeder 1 from the drive of the printing press takes place at exactly the point in time when the last sheets lying in front of the double sheet have been fed into the machine and the double sheet at system 3 has come to a standstill.
  • the sequence made above is triggered accordingly in the remaining printing units (not shown) of a multi-color offset printing machine.
  • the individual printing units operate in such a way that the last two sheets to be printed are printed by the blanket cylinder in all printing units, the ink supply in the associated inking units having already been switched off. So then lie with one Restarting the printing machine in all printing units the same conditions with regard to the remaining layer thicknesses on the plate and blanket cylinders.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Unwinding Webs (AREA)

Abstract

The paper feed sends sheets (6) successively from the top of a stack to check (8) for double feed before descending a slope on a suction conveyor (2) to a stop (3) at the entrance to the machine (5). When a double or interrupted feed is detected, the controller (9) stops the abstraction of sheets from the stack. However it allows the loader (4) to feed all preceding sheets into the machine. It also controls the switching of the ink supply (11) and moves the rubber-coated cylinder (12) out of contact when the double sheet arrives at the stop.

Description

Die Erfindung betrifft ein Verfahren zum Steuern der Bogenzufuhr gemäß dem Oberbegriff von Anspruch 1.The invention relates to a method for controlling the sheet feed according to the preamble of claim 1.

Bei Bogenoffsetdruckmaschinen der bekannten und heute weit verbreiteten Art werden die Bogen von einem Anlegerstapel entnommen, über einen Fördertisch (Saugbändertisch) zur Anlage transportiert, dort ausgerichtet und sodann von einem Vorgreifer ergreiffen und dem ersten Druckwerk übergeben. Damit einerseits ein registergerechter Druck des Sujets bezüglich dem Druckbogen und andererseits Maschinenschäden durch fehlerhaft eingezogene Bogen vermieden werden, erfolgt an verschiedenen Stellen der zuvor beschriebenen Förderstrecke eine sensorische Überwachung des Bogenlaufes.In sheet-fed offset printing machines of the known and widely used type, the sheets are removed from a stack of feeders, transported to the system via a conveyor table (suction belt table), aligned there and then gripped by a pre-gripper and transferred to the first printing unit. In order to avoid, on the one hand, register-correct printing of the subject with regard to the printing sheet and, on the other hand, machine damage due to incorrectly drawn sheets, sensoric monitoring of the sheet travel is carried out at various points on the conveying path described above.

So ist es bekannt, kurz nach dem Abheben des obersten Bogens vom Anlegerstapel den geschuppten Bogenstrom auf das Vorhandensein von Doppelbogen zu überwachen. Zur Doppelbogenkontrolle im geschuppten Bogenstrom finden dabei insbesondere tastende Kontrolleinrichtungen Verwendung. Wird kurz nach der Vereinzelung und nach dem Abheben des obersten Bogens vom Anlegerstapel ein Doppelbogen festgestellt, so erfolgt das unmittelbare Sperren der Anlage und des Vorgreifers sowie das Stillsetzen des Anlegers durch Schalten einer Kupplung, welche den Anleger mit dem Antrieb der Druckmaschine verbindet. Der letzte vor Feststellung eines Doppelbogens noch in die Maschine eingezogene Bogen wird dann noch ausgedruckt, woraufhin das Abstellen der Gummituchzylinder in den einzelnen Druckwerken folgerichtig, d.h. entsprechend dem Bogenlauf eingeleitet wird. Ebenfalls wird auch die Farb- und Feuchtmittelzufuhr auf die Druckplatten in den einzelnen Druckwerken abgeschaltet.It is known to monitor the shingled stream of sheets for the presence of double sheets shortly after the uppermost sheet has been lifted off the stack of feeders. For double sheet control in the shingled sheet stream, feeler control devices are used in particular. If a double sheet is detected shortly after separation and after the top sheet has been lifted off the stack of feeders, the system and the pre-gripper are immediately blocked and the feeder is shut down by switching a coupling that connects the feeder to the drive of the printing press. The last sheet drawn into the machine before the detection of a double sheet is then printed out, whereupon the blanket cylinders are switched off in the individual printing units, i.e. is initiated according to the sheet path. The ink and fountain solution supply to the printing plates in the individual printing units is also switched off.

Eine Kontrollvorrichtung für die Zufuhr von Bogen, welche unmittelbar in Förderrichtung der Bogen hinter dem Anlegerstapel angeordnet ist und zur Erfassung von Doppelbogen dient, ist aus der DE 2 930 270 C2 bekannt. Diese Vorrichtung weist dabei eine angetriebene Transportrolle sowie eine beweglich gegenüber dieser gelagerte Tastrolle auf, wobei die Bogen zwischen diesen Rollen hindurchgefördert werden.A control device for feeding sheets, which is arranged directly in the conveying direction of the sheets behind the stack of feeders and is used to detect double sheets, is known from DE 2 930 270 C2. This device has one Driven transport roller and a feeler roller mounted movably with respect to this, the sheets being conveyed between these rollers.

Das nach dem oben beschriebenen Verfahren unmittelbar eingeleitete Stillsetzen des Anlegers, das Druck-Ab-Stellen sowie das Abschalten der Farb- und Feuchtmittelzufuhr hat dabei gerade für die ersten beiden Druckwerke den Nachteil, daß nach dem letzten in die Maschine einlaufenden und bedruckten Bogen der Farb- und Feuchtmittelfluß abrupt unterbrochen wird. Wird dann nach Beseitigung der Störungsursache (Entfernen des Doppelbogens aus dem Bogenstrom) wieder ein nächster Bogen in die Maschine eingefordert, so kommt es durch das zuvorige Einfärben und Einfeuchten der Druckplatten sowie der Gummitücher zu einer Überfärbung, die sich erst über mehrere Bogen wieder abbaut, was Makulaturanfall bedeutet.The immediately initiated shutdown of the feeder according to the above-described method, the printing-off-setting and the switching off of the ink and dampening solution supply has the disadvantage, especially for the first two printing units, that after the last sheet of ink entering and printing into the machine - And dampening solution flow is abruptly interrupted. If, after eliminating the cause of the malfunction (removing the double sheet from the sheet stream), a next sheet is requested in the machine, the inking and dampening of the printing plates and the blankets leads to an over-dyeing, which only degrades over several sheets. what waste paper means.

Ein weiterer Nachteil des unmittelbaren Stillsetzens der Bogenförderung nach Feststellung eines Doppel- oder Fehlbogens direkt nach der Bogenförderung hinter dem Anlegerstapel ist, daß der Drucker die gesamte Bogenschuppe - zwischen Anlage und Transportrolle liegen etwa 5-7 Bogen - vom Fördertisch abräumen muß und ebenfalls auch den Stopperverursacher, also den Doppelbogen zu entfernen hat. Gerade dünne und empfindliche Bedruckstoffe werden bei dieser Entnahme oft beschädigt, so daß auch hier Makulatur anfällt.Another disadvantage of stopping the sheet feed immediately after detecting a double or missing sheet directly after the sheet feed behind the stack of feeders is that the printer has to clear the entire sheet scale - between the system and the transport roller about 5-7 sheets - from the feed table and also the Stopper causer, i.e. has to remove the double sheet. Thin and sensitive substrates in particular are often damaged during this removal, so that waste is also produced here.

Aufgabe der vorliegenden Erfindung ist es, ein Verfahren gemäß dem Oberbegriff von Anspruch 1 derartig zu gestalten, so daß die oben genannten Nachteile vermieden werden können.The object of the present invention is to design a method according to the preamble of claim 1 in such a way that the disadvantages mentioned above can be avoided.

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

Gemaß der Erfindung ist vorgesehen, daß nach Feststellung eines Doppel- oder Fehlbogens in Förderrichtung der Bogen kurz hinter dem Anlegerstapel noch die vor diesem Doppel- oder Fehlbogen liegenden Bogen in die Druckmaschine eingefördert werden und das Sperren der Anlage erst dann erfolgt, wenn der letzte noch korrekt liegende Bogen vor dem Doppel- oder Fehlbogen in die Maschine eingelaufen ist. Es wird also ausgenutzt, daß sich auf dem Fördertisch etwa 5-7 Bogen vor dem Doppel- oder Fehlbogen in der Schuppe befinden und somit noch korrekt angelegt und auch bedruckt werden können. Der den Stopper auslösende Doppel- oder Fehlbogen kann dann vom Drucker an der Anlage entnommen werden, wobei in der Regel die dem Doppel- oder Fehlbogen folgenden Bogen wieder korrekt in der Schuppe liegen, so daß vom Drucker nur eine minimale Anzahl, insbesondere nur der Doppel- bzw. Fehlbogen selbst entnommen werden muß.According to the invention it is provided that after detection of a double or missing sheet in the conveying direction of the sheet just behind the feeder stack, the sheet lying in front of this double or missing sheet is fed into the printing press and the system is only locked when the last one is still correctly positioned sheets have entered the machine before the double or missing sheet. So it is exploited that there are about 5-7 sheets on the conveyor table in front of the double or missing sheet in the scale located and can therefore still be correctly created and printed. The double or missing sheet which triggers the stopper can then be removed by the printer at the system, the sheets following the double or missing sheet usually being correctly in the scale again, so that the printer only has a minimal number, in particular only the double - or missing sheet itself must be removed.

Dadurch, daß nach Feststellen des Doppel- oder Fehlbogens eine dem Unterschuppungsgrad sowie der Lange zwischen Bogenabtastung und Anlage entsprechende Anzahl an Bogen noch korrekt gefördert der Maschine zugeführt werden, kann insbesondere im ersten und zweiten Druckwerk die Farb- oder Feuchtmittelzufuhr eine vorgegebene Anzahl von Umdrehungen vor Einzug des letzten, korrekt an der Anlage anliegenden Bogens abgestellt werden. Es erfolgt somit noch eine Farbabnahme von Gummituch und Druckplatte, so daß eine überhöhte Farbmenge, welche beim Wiederanfahren zu einer Überfärbung der ersten Bogen führt, vermieden wird.The fact that after determining the double or missing sheet a correct number of sheets corresponding to the degree of scaling and the length between sheet scanning and the system are still fed to the machine, the ink or dampening solution supply can in particular in the first and second printing units a predetermined number of revolutions Of the last sheet that is correctly attached to the machine. There is thus still a decrease in ink from the blanket and printing plate, so that an excessive amount of ink, which leads to over-coloring of the first sheets when restarted, is avoided.

Des weiteren erfolgt die Erläuterung eines Ausführungsbeispiels der Erfindung anhand der Zeichnung. Diese zeigt dabei den Anleger 1 sowie das erste Druckwerk 5 einer Bogenoffsetdruckmaschine. Durch nicht dargestellte und an sich bekannte Transportmittel werden von der Oberseite eines Anlegerstapels Bogen entnommen und über eine Transportrolle 7 auf einen als Saugbändertisch ausgebildeten Fördertisch 2 gefördert. Die Bogen 6 auf der Oberseite des Fördertisches 2 werden dann durch Saugbänder in unterschuppter Weise zur Anlage 3 gefördert, wo nach einem Ausrichtvorgang bei nach korrekt festgestellter Lage der Bogen von einem Vorgreifer 4 erfaßt und auf Umfangsgeschwindigkeit der Zylinder im Druckwerk 5 beschleunigt wird.Furthermore, an embodiment of the invention is explained with reference to the drawing. This shows the feeder 1 and the first printing unit 5 of a sheetfed offset printing machine. By means of transport means which are not shown and are known per se, sheets are removed from the top of a feeder stack and conveyed via a transport roller 7 onto a conveyor table 2 designed as a suction belt table. The sheets 6 on the upper side of the conveyor table 2 are then conveyed by suction belts in a shingled manner to the system 3, where after an alignment process with a correctly determined position, the sheet is gripped by a pre-gripper 4 and accelerated to the peripheral speed of the cylinders in the printing unit 5.

In Förderrichtung der Bogen 6 ist im Bereich der Transportrolle 7 des Anlegers 1 eine insbesondere mit der Transportrolle 7 zusammenwirkende Bogenkontrolle 8 angeordnet, welche insbesondere die korrekte Bogenvereinzelung im Hinblick auf Doppelbogen prüft. Diese Bogenkontrolle 8 ist mit einer noch weiter unten stehend erläuterten Steuerung 9 verbunden. Sind über die Formatbreite bzw. über die Länge der Transportrolle 7 mehrere Bogenkontrollen 8 angeordnet, so kann an dieser Stelle auch eine Erfassung von Schrägbogen erfolgen.Arranged in the conveying direction of the sheets 6 in the area of the transport roller 7 of the feeder 1 is a sheet control 8 which interacts in particular with the transport roller 7 and which checks in particular the correct sheet separation with regard to double sheets. This sheet control 8 is connected to a control 9 explained below. If several sheet controls 8 are arranged over the format width or over the length of the transport roller 7, inclined sheets can also be detected at this point.

Es befinden sich auf dem Fördertisch 2 entsprechend der Formatlänge, der Unterschuppung sowie dem Abstand zwischen der Anlage 3 und der Transportrolle 7 eine bestimmte Anzahl von Bogen 6. Im dargestellten Beispiel sind dies sechs Bogen, wenn das Ende des obersten Bogens die Transportrolle 7 verlassen hat und der unterste Bogen an der Anlage 3 anliegt.There are a certain number of sheets 6 on the conveyor table 2 in accordance with the format length, the shingling and the distance between the system 3 and the transport roller 7. In the example shown, these are six sheets when the end of the uppermost sheet has left the transport roller 7 and the bottom sheet bears against system 3.

Zur Verdeutlichung der erfindungsgemäßen Vorgehensweise sei nun gemäß Darstellung der Figur angenommen, daß der zwischen der Transportrolle 7 und der Bogenkontrolle 8 befindliche Bogen ein Doppelbogen ist. Die Bogenkontrolle 8 leitet dazu der Steuerung 9 ein entsprechendes Signal zu. Aus der Formatlange der Bogen 6, der vorgesehenen Unterschuppung sowie dem Abstand zwischen Anlage 3 und Transportrolle 7 ist nun in einfacher Weise errechenbar, wieviele Bogen 6 über den Fördertisch 2 noch in das erste Druckwerk 5 der Maschine einlaufen können. Im dargestellten Beispiel waren dies sechs Bogen.To clarify the procedure according to the invention, it is now assumed, as shown in the figure, that the sheet located between the transport roller 7 and the sheet control 8 is a double sheet. For this purpose, the sheet control 8 sends a corresponding signal to the control 9. From the format length of the sheets 6, the intended shingling and the distance between the system 3 and the transport roller 7, it is now easy to calculate how many sheets 6 can still enter the first printing unit 5 of the machine via the feed table 2. In the example shown, this was six sheets.

Unmittelbar nach Feststellen des Doppelbogens im Bereich der Transportrolle 7 durch die Bogenkontrolle 8 erfolgt über die Steuerung 9 das Abschalten der hier nicht dargestellten Bogenvereinzelungs- und Fördermittel des Anlegers 1. Die Steuerung 9 steht dazu mit diesen hier nicht dargestellten Mittel in Wirkverbindung. Die sechs vor dem Doppelbogen liegenden Bogen 6 aufdem Fördertisch 2 werden nun noch durch den Vorgreifer 4 in das Druckwerk 5 eingefördert, bis der Doppelbogen die Anlage 3 erreicht hat, woraufhin ein Sperren des Vorgreifers 4 sowie der Anlage 3 erfolgt. Die Steuerung 9 steht dazu in Wirkverbindung mit der Anlage 3 sowie dem Vorgreifer 4. Die Steuerung 9 steht ferner mit einem an einer Eintourenwelle des Druckwerkes 5 angebrachten Inkremental- oder Absolutwinkelgeber in Wirkverbindung, so daß aus diesen Signalen die noch mögliche Zahl von in die Maschine hineinzufordernden Bogen über die Maschinenumdrehungen ermittelbar ist.Immediately after detection of the double sheet in the area of the transport roller 7 by the sheet control 8, the sheet separation and conveying means of the feeder 1 (not shown here) are switched off via the controller 9. The controller 9 is in operative connection with these means, not shown here. The six sheets 6 lying in front of the double sheet on the conveyor table 2 are now fed into the printing unit 5 by the pre-gripper 4 until the double sheet has reached the system 3, whereupon the pre-gripper 4 and the system 3 are blocked. The control 9 is in operative connection with the system 3 and the pre-gripper 4. The control 9 is also in active connection with an incremental or absolute angle encoder attached to a single-speed shaft of the printing unit 5, so that the signals still allow the number of into the machine can be determined via the machine revolutions.

Die Steuerung 9 steht ferner mit nicht dargestellten Schaltmitteln zur Unterbrechung der Farbzufuhr in einem hier symbolisch dargestellten Farbwerk 11 des Druckwerkes 5 in Wirkverbindung. Die nicht dargestellten Schaltmittel bewirken insbesondere das An- und Abstellen von Farbauftragswalzen gegenüber einem Plattenzylinder sowie das Sperren bzw. Entsperren der Bewegung eines Farbhebers. Nicht dargestellt aber entsprechend analog ist die Wirkverbindung der Steuerung 9 mit entsprechenden Schaltmitteln zu dem Feuchtwerk in Druckwerk 5. Ebenfalls steht die Steuerung 9 in Wirkverbindung mit nicht dargestellten Schaltmitteln, um den Gummituchzylinder 12 gegenüber dem hier doppelt großen Gegendruckzylinder sowie dem darüberliegenden Plattenzylinder an- und abzustellen.The controller 9 is also operatively connected to switching means, not shown, for interrupting the ink supply in an inking unit 11 of the printing unit 5, which is shown here symbolically. The switching means, not shown, in particular cause the inking rollers to be turned on and off relative to a plate cylinder, and to lock or unlock the movement of an ink lifter. Not shown, but correspondingly analogous, is the operative connection of the controller 9 with corresponding switching means to the dampening unit in the printing unit 5. Likewise, the controller 9 is not actively connected to Switching means shown to turn the blanket cylinder 12 on and off compared to the double-sized impression cylinder and the plate cylinder above.

Nach dem Feststellen eines Doppelbogens im Bereich der Transportrolle 7 durch die Bogenkontrolle 8 und dem darauf folgenden Abschalten der Bogenvereinzelungsmitttel erfolgt nach einer vorgegebenen Anzahl von Eintourenumdrehungen, also während die dem Doppelbogen vorausgehenden korrekt geförderten Bogen 6 noch in die Maschine einlaufen ein Unterbrechen der Farbzufuhr des Farbwerkes 11. Nachdem dann der letzte dem Doppelbogen vorausgehende, korrekt geforderte Bogen von dem Gummituchzylinder 12 bedruckt wurde, also während der Doppelbogen an der Anlage 3 angekommen ist, erfolgt das Abstellen des Gummituchzylinders 12 vom Gegendruckzylinder sowie auch von dem darüberliegenden Plattenzylinder. Beispielsweise kann vorgesehen sein, daß die dem letzten dem Doppelbogen vorausgehenden Bogen vom Gummituchzylinder 12 noch bedruckt werden, wobei die Farbzufuhr des Farbwerkes 11 auf die Platte des darüberliegenden Plattenzylinders bereits unterbrochen ist. Durch diese beiden letzten Bogen erfolgt somit eine Farbabnahme. Die Schaltzeitpunkte, zu welcher die Steuerung 9 die zuvorstehend geschilderten Vorgänge auslöst, richten sich dabei nach den konstruktiven Gegebenheiten der Drucktnaschine sowie ferner auch empirisch gewonnenen Vorgaben. Letzteres gilt insbesondere für die Zahl an Bogen, welche bei unterbrochener Farbzufuhr des Farbwerkes 11 noch vom Gummituchzylinder 12 bedruckt werden.After the detection of a double sheet in the area of the transport roller 7 by the sheet control 8 and the subsequent switching off of the sheet separating means takes place after a predetermined number of one-revolution rotations, i.e. while the correctly conveyed sheets 6 preceding the double sheet still enter the machine, the ink supply of the inking unit is interrupted 11. After the last, correctly requested sheet preceding the double sheet has been printed by the blanket cylinder 12, that is to say while the double sheet has arrived at the system 3, the blanket cylinder 12 is switched off from the impression cylinder and also from the plate cylinder lying above it. For example, it can be provided that the last sheet preceding the double sheet is still printed by the blanket cylinder 12, the ink supply of the inking unit 11 to the plate of the plate cylinder lying above it being interrupted. There is thus a decrease in color through these last two sheets. The switching times at which the controller 9 triggers the processes described above are based on the design conditions of the printing press and also on empirically obtained guidelines. The latter applies in particular to the number of sheets which are still printed by the blanket cylinder 12 when the ink supply 11 is interrupted.

Die Steuerung 9 steht mit einer Anlegerkupplung 10 in Wirkverbindung, mittels der vom Antrieb der Druckmaschine getriebene Anleger 1 stillsetzbar ist. Das Schalten also Abkuppeln des Anlegers 1 vom Antrieb der Druckmaschine erfolgt dabei genau zu dem Zeitpunkt, wenn die letzten, vor dem Doppelbogen liegenden Bogen in die Maschine eingefördert wurden und der Doppelbogen an der Anlage 3 zum Stillstand gekommen ist.The controller 9 is operatively connected to a feeder coupling 10, by means of which feeder 1 driven by the drive of the printing press can be stopped. Switching off the feeder 1 from the drive of the printing press takes place at exactly the point in time when the last sheets lying in front of the double sheet have been fed into the machine and the double sheet at system 3 has come to a standstill.

Der zuvorstehend gemachte Ablauf wird dabei in den übrigen, nicht dargestellten Druckwerken einer Mehrfarben-Offsetdruckmaschine entsprechend ausgelöst. Insbesondere wird in den einzelnen Druckwerken derartig verfahren, daß die letzten beiden zu bedruckenden Bogen in allen Druckwerken vom Gummituchzylinder bedruckt werden, wobei die Farbzufuhr in den zugehörigen Farbwerken bereits abgestellt wurden. So liegen dann bei einem Wiederanfahren der Druckmaschine in allen Druckwerken die gleichen Verhältnisse hinsichtlich der verbleibenden Schichtdicken auf dem Platten- und Gummituchzylindern vor.The sequence made above is triggered accordingly in the remaining printing units (not shown) of a multi-color offset printing machine. In particular, the individual printing units operate in such a way that the last two sheets to be printed are printed by the blanket cylinder in all printing units, the ink supply in the associated inking units having already been switched off. So then lie with one Restarting the printing machine in all printing units the same conditions with regard to the remaining layer thicknesses on the plate and blanket cylinders.

BezugszeichenlisteReference list

11
AnlegerInvestors
22nd
FördertischPromotion table
33rd
Anlageinvestment
44th
VorgreiferForerunner
55
DruckwerkPrinting unit
66
Bogenbow
77
TransportrolleTransport roller
88th
BogenkontrolleBow control
99
Steuerungcontrol
1010th
AnlegerkupplungFeeder coupling
1111
FarbwerkInking unit
1212th
GummituchzylinderBlanket cylinder

Claims (3)

Verfahren zur Steuerung der Bogenzufuhr bei einer bogenverarbeitenden Druckmaschine, insbesondere Bogenoffsetdruckmaschine, bei welcher die zu bedruckenden Bogen von der Oberseite eines Anlegerstapels entnommen und daraufhin hinsichtlich ders Vorhandenseins von Doppel- bzw. Fehlbogen geprüft werden und ein Transport der Bogen über eine vorgegebene Förderstrecke zur Anlage der Druckmaschine erfolgt, wobei ein Stillsetzen des Bogentransportes in Abhängigkeit der Bogenkontrolle vorgesehen ist,
dadurch gekennzeichnet,
daß bei Feststellung eines Doppel- oder Fehlbogens die Entnahme der Bogen vom Anlegerstapel sofort stillgesetzt wird, daß die in Bogentransportrichtung dem Doppel- bzw. Fehlbogen vorausgehenden Bogen noch in die Druckmaschine hereingefördert werden, und daß das Stillsetzen der Bogenförderung erfolgt, wenn der Doppel- oder Fehlbogen die Anlage erreicht.Method for controlling the sheet feed in a sheet-processing printing machine, in particular sheet-fed offset printing machine, in which the sheets to be printed are removed from the top of a stack of feeders and then checked for the presence of double or missing sheets and a transport of the sheets over a predetermined conveying path to the system of the Printing machine is carried out, the sheet transport being stopped depending on the sheet control,
characterized,
that when a double or missing sheet is detected, the removal of the sheets from the stack of feeders is stopped immediately, that the sheets preceding the double or missing sheet in the sheet transport direction are still fed into the printing press, and that the sheet feeding is stopped when the double or Missed sheet reached the facility. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß die Anzahl der in Bogentransportrichtung vor dem Doppelbogen liegenden und noch in die Maschine hereinzufördernden Bogen aus dem Abstand zwischen der Anlage und der Bogenkontrolle in Verbindung mit dem Unterschuppungsgrad bei unterschuppter Bogenzufuhr sowie der Formatlänge der Bogen bestimmt wird.Method according to claim 1,
characterized,
that the number of sheets lying in front of the double sheet in the sheet transport direction and still to be fed into the machine is determined from the distance between the system and the sheet control in connection with the underdevelopment degree with undercut sheet feed and the format length of the sheets. Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß nach Feststellen einer nicht korrekten Bogerzufuhr vor Einlaufen des letzten in Bogentransportrichtung vor dem Doppelbogen liegenden Bogens in die Maschine die Farbzufuhr abgestellt wird.The method of claim 1 or 2,
characterized,
that after determining an incorrect sheet feed before the last sheet lying in front of the double sheet in the sheet transport direction into the machine, the ink supply is switched off.
EP96101564A 1995-02-18 1996-02-03 Method for controlling the sheet feeding Expired - Lifetime EP0727374B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19505560A DE19505560C2 (en) 1995-02-18 1995-02-18 Procedure for controlling sheet feeding
DE19505560 1995-02-18

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EP0727374A1 true EP0727374A1 (en) 1996-08-21
EP0727374B1 EP0727374B1 (en) 1998-09-09

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EP (1) EP0727374B1 (en)
JP (1) JP2783778B2 (en)
AT (1) ATE170819T1 (en)
DE (2) DE19505560C2 (en)

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EP0978378A2 (en) * 1998-08-01 2000-02-09 Koenig & Bauer Aktiengesellschaft Method and device for maintaining an ink profile similar to the final run
EP1352742A1 (en) * 2002-04-12 2003-10-15 Koenig & Bauer Aktiengesellschaft Sheet supply control method
EP1710082A2 (en) * 1999-03-01 2006-10-11 Komori Corporation Sheet supply control apparatus and method for printing press
CN101670949A (en) * 2008-09-12 2010-03-17 海德堡印刷机械股份公司 Method and apparatus for feeding sheets to a processing machine

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EP0978378A2 (en) * 1998-08-01 2000-02-09 Koenig & Bauer Aktiengesellschaft Method and device for maintaining an ink profile similar to the final run
EP0978378A3 (en) * 1998-08-01 2000-06-07 Koenig & Bauer Aktiengesellschaft Method and device for maintaining an ink profile similar to the final run
EP1710082A2 (en) * 1999-03-01 2006-10-11 Komori Corporation Sheet supply control apparatus and method for printing press
EP1710082A3 (en) * 1999-03-01 2008-03-19 Komori Corporation Sheet supply control apparatus and method for printing press
EP1352742A1 (en) * 2002-04-12 2003-10-15 Koenig & Bauer Aktiengesellschaft Sheet supply control method
EP2135743A2 (en) 2002-04-12 2009-12-23 Koenig & Bauer AG Method for controlling sheet supply
EP2135743A3 (en) * 2002-04-12 2012-04-04 Koenig & Bauer AG Method for controlling sheet supply
CN101670949A (en) * 2008-09-12 2010-03-17 海德堡印刷机械股份公司 Method and apparatus for feeding sheets to a processing machine
CN101670949B (en) * 2008-09-12 2013-12-18 海德堡印刷机械股份公司 Method and apparatus for feeding sheets to processing machine

Also Published As

Publication number Publication date
EP0727374B1 (en) 1998-09-09
DE59600521D1 (en) 1998-10-15
JP2783778B2 (en) 1998-08-06
DE19505560C2 (en) 1998-07-02
ATE170819T1 (en) 1998-09-15
DE19505560A1 (en) 1996-08-22
US5626077A (en) 1997-05-06
JPH08244212A (en) 1996-09-24

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