EP0663290A1 - Driving mechanism for a vibrating scraper - Google Patents

Driving mechanism for a vibrating scraper Download PDF

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Publication number
EP0663290A1
EP0663290A1 EP95100294A EP95100294A EP0663290A1 EP 0663290 A1 EP0663290 A1 EP 0663290A1 EP 95100294 A EP95100294 A EP 95100294A EP 95100294 A EP95100294 A EP 95100294A EP 0663290 A1 EP0663290 A1 EP 0663290A1
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EP
European Patent Office
Prior art keywords
drive according
computer
working cylinder
traversing
sensors
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Granted
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EP95100294A
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German (de)
French (fr)
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EP0663290B1 (en
Inventor
Ulrich Denk
Horst Anders
Ralf Dr. Schädlich
Dieter Ringsleben
Stephan Leissner
Jochen Junghans
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Manroland AG
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MAN Roland Druckmaschinen AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F9/00—Rotary intaglio printing presses
    • B41F9/06—Details
    • B41F9/08—Wiping mechanisms
    • B41F9/10—Doctors, scrapers, or like devices
    • B41F9/1009—Doctors, scrapers, or like devices with reciprocating movement

Definitions

  • the invention relates to a drive for an oscillating doctor device according to the preamble of claim 1.
  • a mechanical squeegee drive (DE 32 47 679 A1) is known in which the traversing movement is driven by a circumferentially driven groove with a circumferential groove which is axially deflected relative to a radial plane and into which a sliding block of a sleeve connected to the squeegee slide and secured against rotation engages. equipped spindle is generated.
  • the mechanical squeegee drive is at risk of wear due to the sliding connection and is inevitably subject to wear-dependent play, which has a negative effect on the squeegee process, particularly in the reversal points of the squeegee, due to its prolonged standstill.
  • the reversal points are always in the same place, which promotes both increased squeegee wear and scoring on the roller to be inked.
  • the squeegee drive takes place via a shaft on which two clutches with counter-rotating drive wheels are fastened, which can be alternately coupled with a drive wheel, the direction of rotation of the drive wheels being opposite.
  • the shaft has a transport thread at its other end, which is connected to a squeegee holder via a coupling bush.
  • pages 362 and 363 of the book mentioned also describe a hydraulic drive for the squeegee movement, in which the squeegee beam is coupled to a hydraulic cylinder.
  • the reversal of the direction of the doctor blade movement is effected by a valve connected by two probes connected to the doctor blade beam.
  • the invention has for its object to provide a drive for an oscillating doctor device according to the preamble of claim 1, which largely a constant doctor movement in the entire stroke range, a change of direction with minimal standstill and a continuous adjustment of the speed - possibly depending on the machine speed - as well as a reversal point shift of the squeegee movement.
  • the invention ensures a constant shifting of the reversal point for the squeegee movement, particularly with relatively little effort, so that local squeegee wear and damage to the surface of the anilox roller in the form of grooves are avoided in connection with the virtually non-stop reversal of direction. which increases the service life of doctor and anilox rollers in a cost-saving manner.
  • the cycle time of the computer which is itself disadvantageous for control processes, can advantageously be used for an additional shifting of the reversal points of the squeegee movement.
  • a hydraulic servo valve is particularly suitable for controlling the working cylinder, since it enables particularly low traversing speeds to be implemented reliably.
  • the squeegee carrier 1 has an anti-rotation device 6 and holder 7 guided in the frame 5; 8 for a doctor blade holder 10 which can be pivoted to the anilox roller relative to the doctor blade carrier 1 with the aid of a pressure medium-operated working cylinder 9.
  • the doctor blade carrier 1 is provided with a position sensor 11 for two sensors 13 fixed to the frame and connected to a computer 12; 14 equipped.
  • the computer 12 is connected to a control unit 15 for one in the pressure medium lines 16; 17 coupled for the working cylinder 3 intermediate servo valve 18.
  • FIG. 2 shows a schematic representation of a solution designed according to FIG. 1, in which the doctor blade carrier in the form of a traversing shaft 19 is displaceable in bearings 21 fastened on a cross member 20; 22 mounted and the working cylinder 3 with its piston rod 2 coaxially aligned to the traversing shaft 19 via the coupling 4 with the latter firmly attached to the cross member 20, the coupling 4 consisting of two separately fastened on the piston rod 2 and the traversing shaft 19, axially driver disks 23 screwed together; 24 exists.
  • an elastically deformable disk 25 can also be arranged.
  • a lever 26 is fastened thereon, which carries an axle pin 28 which engages in a sliding seat 27 connected to the bearing 22 for the traversing shaft 19.
  • the cross member 20 between the frame walls 29; 30 of the frame is firmly screwed to it, it can also be used as a cross member between two serving to pivot the entire doctor device from the anilox roller, each pivotable in the frame walls 29; 30 mounted holders can be arranged.
  • the computer 12 which can also be integrated into a printing unit computer, for example, has the traversing speed v as an adjustable input variable, which may also be linked to the machine speed, and the control unit 15 connected to the computer, in addition to the traversing speed v, has the time t as output variables for the servo valve 18 , since within the by the sensors 13; 14 limited stroke range H from the working cylinder 3 to the direction reversal by the respective sensor 13; 14 partial stroke ranges T, which are continuously displaced in the same direction, including the associated reverse traversing movement T c shortened by the offset T v , are permanently programmed in the computer (FIG. 3). This means that with an increase in the traversing speed and thus the lifting speed of the working cylinder, the time for the latter to be pressurized is inevitably shortened.
  • a technically more complex control of the doctor carrier movement is instead of the sensors 13; 14 in Fig. 1 a dash-dotted, the computer over the entire stroke range H of the working cylinder 3 path impulses 31 to arrange, whereby the sub-areas T 1 to T 6 , including the associated retrograde traversing movements T c1 to T c5 , according to FIG. 5 different can be designed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

The device comprises two sensors (13,14) which are coupled to a computer (12). The computer,via a control unit (15), controls the stroke range of the work cylinder (3) limited by the sensors. The backward-running change movement into the part stroke range is shortened. The doctor carrier (1) has a fixture against rotation (6) and holders (7,8) fitted in the frame (5) for a doctor blade retainer (10). The retainer is pivotable with the aid of a pressure medium-operated work cylinder (9) in relation to the doctor carrier on the raster roller. The doctor carrier is equipped with a position indicator (11) for two sensors connected to a computer.

Description

Die Erfindung betrifft einen Antrieb für eine changierende Rakelvorrichtung nach dem Oberbegriff von Anspruch 1.The invention relates to a drive for an oscillating doctor device according to the preamble of claim 1.

Bekannt ist ein mechanischer Rakelantrieb (DE 32 47 679 A1), bei dem die Changierbewegung durch eine in Umfangsrichtung angetriebene, mit einer umlaufenden, gegenüber einer Radialebene axial ausgelenkten Nut, in die ein Gleitstein einer mit dem Rakelschlitten verbundenen, gegen Verdrehung gesicherten Büchse eingreift, ausgerüstete Spindel erzeugt wird.A mechanical squeegee drive (DE 32 47 679 A1) is known in which the traversing movement is driven by a circumferentially driven groove with a circumferential groove which is axially deflected relative to a radial plane and into which a sliding block of a sleeve connected to the squeegee slide and secured against rotation engages. equipped spindle is generated.

Der mechanische Rakelantrieb ist auf Grund der Gleitverbindung verschleißgefährdet und zwangsläufig mit einem vom Verschleiß abhängigen, sich besonders in den Umkehrpunkten der Rakel infolge ihres verlängerten Stillstandes auf den Rakelvorgang negativ auswirkenden Spiel behaftet. Außerdem befinden sich die Umkehrpunkte immer an der gleichen Stelle, wodurch sowohl ein erhöhter Rakelverschleiß als auch eine Riefenbildung auf der einzufärbenden Walze begünstigt werden.The mechanical squeegee drive is at risk of wear due to the sliding connection and is inevitably subject to wear-dependent play, which has a negative effect on the squeegee process, particularly in the reversal points of the squeegee, due to its prolonged standstill. In addition, the reversal points are always in the same place, which promotes both increased squeegee wear and scoring on the roller to be inked.

In der CH-PS 551 868 erfolgt der Rakelantrieb über eine Welle, auf der zwei Kupplungen mit sich entgegengesetzt drehenden Antriebsrädern befestigt sind, die abwechselnd mit einem Antriebsrad kuppelbar sind, wobei die Drehrichtung der Antriebsräder entgegengesetzt ist. Die Welle besitzt an ihrem anderen Ende ein Transportgewinde, das über eine Kupplungsbuchse mit einem Rakelhalter verbunden ist.In CH-PS 551 868, the squeegee drive takes place via a shaft on which two clutches with counter-rotating drive wheels are fastened, which can be alternately coupled with a drive wheel, the direction of rotation of the drive wheels being opposite. The shaft has a transport thread at its other end, which is connected to a squeegee holder via a coupling bush.

In dem Fachbuch "Tiefdruck", Polygraph Verlag, Frankfurt am Main, 2. Auflage 1993, S. 362 wird für diese Lösung eine Hubverstellung beschrieben, bei der zwei jeweils den Kuppelvorgang auslösende Initiatoren auf einer Stellspindel angeordnet sind und von einer auf der Welle sitzenden Metallscheibe wechselweise in Funktion gesetzt werden.In the specialist book "Gravure", Polygraph Verlag, Frankfurt am Main, 2nd edition 1993, p. 362, a stroke adjustment is described for this solution, in which two initiators each triggering the coupling process are arranged on an adjusting spindle and one on the shaft Metal disc can be put into operation alternately.

Auch für diese Lösung gelten die bereits genannten Nachteile. Hinzu kommt ein beträchtlicher, insbesondere das Kuppelgetriebe betreffender mechanischer Aufwand.The disadvantages already mentioned also apply to this solution. In addition, there is considerable mechanical effort, particularly in relation to the coupling gear.

Schließlich ist noch in dem genannten Buch auf den Seiten 362 und 363 ein hydraulischer Antrieb für die Rakelbewegung beschrieben, bei dem der Rakelbalken mit einem Hydraulikzylinder gekoppelt ist. Die Richtungsumkehr der Rakelbewegung wird von einem von zwei mit dem Rakelbalken verbundenen Sonden geschalteten Ventil bewirkt.Finally, pages 362 and 363 of the book mentioned also describe a hydraulic drive for the squeegee movement, in which the squeegee beam is coupled to a hydraulic cylinder. The reversal of the direction of the doctor blade movement is effected by a valve connected by two probes connected to the doctor blade beam.

Zwar ist auch bei dieser Lösung die Größe des Rakelhubes einstellbar, jedoch liegen die Umkehrpunkte nach der jeweiligen Einstellung immer an der gleichen Stelle.Although the size of the squeegee stroke can also be set in this solution, the reversal points are always in the same place after the respective setting.

Der Erfindung liegt die Aufgabe zugrunde, einen Antrieb für eine changierende Rakelvorrichtung gemäß Oberbegriff von Anspruch 1 zu schaffen, die weitestgehend eine konstante Rakelbewegung im gesamten Hubbereich, einen Richtungswechsel mit minimalem Stillstand und eine stufenlose Verstellung der Geschwindigkeit - ggf. in Abhängigkeit von der Maschinengeschwindigkeit - sowie eine Umkehrpunktverlagerung der Rakelbewegung realisiert.The invention has for its object to provide a drive for an oscillating doctor device according to the preamble of claim 1, which largely a constant doctor movement in the entire stroke range, a change of direction with minimal standstill and a continuous adjustment of the speed - possibly depending on the machine speed - as well as a reversal point shift of the squeegee movement.

Die Aufgabe wird durch die kennzeichnenden Merkmale von Anspruch 1 gelöst.The object is achieved by the characterizing features of claim 1.

Die Erfindung gewährleistet neben der Erfüllung der anderen Forderungen der Aufgabenstellung vor allem mit einem verhältnismäßig geringen Aufwand eine ständige Umkehrpunktverlagerung für die Rakelbewegung, so daß in Verbindung mit der nahezu stillstandslosen Richtungsumkehr eine lokale Rakelabnutzung und Beschädigungen der Oberfläche der Rasterwalze in Form von Riefen vermieden werden, was die Standzeit von Rakel- und Rasterwalze kostensparend erhöht. Dabei kann die ansich für Steuervorgänge nachteilige Zycluszeit des Rechners in vorteilhafter Weise für eine zusätzliche Verlagerung der Umkehrpunkte der Rakelbewegung genutzt werden.In addition to fulfilling the other requirements of the task, the invention ensures a constant shifting of the reversal point for the squeegee movement, particularly with relatively little effort, so that local squeegee wear and damage to the surface of the anilox roller in the form of grooves are avoided in connection with the virtually non-stop reversal of direction. which increases the service life of doctor and anilox rollers in a cost-saving manner. The cycle time of the computer, which is itself disadvantageous for control processes, can advantageously be used for an additional shifting of the reversal points of the squeegee movement.

Für die Steuerung des Arbeitszylinders ist ein hydraulisches Servoventil besonders geeignet, da mit ihm besonders geringe Changierbeschwindigkeiten funktionssicher realisierbar sind.A hydraulic servo valve is particularly suitable for controlling the working cylinder, since it enables particularly low traversing speeds to be implemented reliably.

Die Unteransprüche enthalten weitere vorteilhafte Ausgestaltungen der Erfindung.The subclaims contain further advantageous refinements of the invention.

Die Erfindung wird nachfolgend an einem Ausführungsbeispiel näher erläutert. In den zugehörigen Zeichnungen zeigen:

Fig. 1:
ein Antriebsschema für die Changierbewegung eines Rakelträgers
Fig. 2:
eine Gestaltungsvariante für die Anordnung von Arbeitszylinder und Rakelträger
Fig. 3:
ein Weg-Schrittdiagramm des Arbeitszylinders mit zwei Sensoren gemäß Fig. 1
Fig. 4:
ein Zustandsdiagramm des Arbeitszylinders gemäß Fig. 3
Fig. 5:
ein Weg-Schrittdiagramm des Arbeitszylinders mit einem Wegmeßsystem anstatt der Sensoren gemäß Fig. 1
Fig. 1 zeigt einen zu einer nicht dargestellten Rakelwalze achsparallel verschiebbar gelagerten Rakelträger 1, mit dem die Kolbenstange 2 eines doppelseitig mit einem Druckmittel beaufschlagbaren Arbeitszylinders 3 in Changierrichtung wirkend mittels Kupplung 4 fest verbunden ist.The invention is explained in more detail below using an exemplary embodiment. In the accompanying drawings:
Fig. 1:
a drive scheme for the traversing movement of a doctor carrier
Fig. 2:
a design variant for the arrangement of the working cylinder and doctor blade carrier
Fig. 3:
2 shows a path-step diagram of the working cylinder with two sensors according to FIG. 1
Fig. 4:
3 shows a state diagram of the working cylinder according to FIG. 3
Fig. 5:
2 shows a displacement step diagram of the working cylinder with a displacement measurement system instead of the sensors according to FIG. 1
1 shows a doctor carrier 1, which is displaceable axially parallel to a doctor roller (not shown) and to which the piston rod 2 of a working cylinder 3, which can be acted upon on both sides by a pressure medium, is fixedly connected in the traversing direction by means of coupling 4.

Der Rakelträger 1 besitzt eine im Gestell 5 geführte Verdrehsicherung 6 und Halter 7; 8 für eine mit Hilfe eines druckmittelbetriebenen Arbeitszylinders 9 gegenüber dem Rakelträger 1 an die Rasterwalze anschwenkbare Rakelmesserhalterung 10.The squeegee carrier 1 has an anti-rotation device 6 and holder 7 guided in the frame 5; 8 for a doctor blade holder 10 which can be pivoted to the anilox roller relative to the doctor blade carrier 1 with the aid of a pressure medium-operated working cylinder 9.

Der Rakelträger 1 ist mit einem Positionsgeber 11 für zwei gestellfeste, an einem Rechner 12 angeschlossene Sensoren 13; 14 ausgestattet.The doctor blade carrier 1 is provided with a position sensor 11 for two sensors 13 fixed to the frame and connected to a computer 12; 14 equipped.

Der Rechner 12 ist mit einer Steuereinheit 15 für ein in die Druckmittelleitungen 16; 17 für den Arbeitszylinder 3 zwischengeschaltetes Servoventil 18 gekoppelt.The computer 12 is connected to a control unit 15 for one in the pressure medium lines 16; 17 coupled for the working cylinder 3 intermediate servo valve 18.

Fig. 2 zeigt eine gemäß Fig. 1 gestaltete Lösung in schematischer Darstellung, bei der der Rakelträger in Form einer Changierwelle 19 verschiebbar in auf einer Traverse 20 befestigten Lagern 21; 22 gelagert und der Arbeitszylinder 3 mit seiner Kolbenstange 2 koaxial zur Changierwelle 19 ausgerichtet über die Kupplung 4 mit letzterer fest verbunden auf der Traverse 20 befestigt ist, wobei die Kupplung 4 aus zwei jeweils getrennt auf der Kolbenstange 2 bzw. der Changierwelle 19 befestigten, axial miteinander verschraubten Mitnehmerscheiben 23; 24 besteht. Zum Ausgleich eines geringen Axialversatzes kann zwischen den Mitnehmerscheiben 23; 24 zusätzlich eine elastisch verformbare Scheibe 25 angeordnet werden.FIG. 2 shows a schematic representation of a solution designed according to FIG. 1, in which the doctor blade carrier in the form of a traversing shaft 19 is displaceable in bearings 21 fastened on a cross member 20; 22 mounted and the working cylinder 3 with its piston rod 2 coaxially aligned to the traversing shaft 19 via the coupling 4 with the latter firmly attached to the cross member 20, the coupling 4 consisting of two separately fastened on the piston rod 2 and the traversing shaft 19, axially driver disks 23 screwed together; 24 exists. To compensate for a slight axial offset, can be between the drive plates 23; 24 an elastically deformable disk 25 can also be arranged.

Als Verdrehsicherung 6 für die Changierwelle 19 ist auf dieser ein Hebel 26 befestigt, der einen in ein mit dem Lager 22 für die Changierwelle 19 verbundenen Schiebesitz 27 eingreifenden Achszapfen 28 trägt.As an anti-rotation device 6 for the traversing shaft 19, a lever 26 is fastened thereon, which carries an axle pin 28 which engages in a sliding seat 27 connected to the bearing 22 for the traversing shaft 19.

Während in Fig. 2 die Traverse 20 zwischen den Gestellwänden 29; 30 des Gestells angeordnet mit diesen fest verschraubt ist, kann diese auch als Querträger fest zwischen zwei dem Abschwenken der gesamten Rakelvorrichtung von der Rasterwalze dienenden, jeweils schwenkbar in den Gestellwänden 29; 30 gelagerten Haltern angeordnet sein.2, the cross member 20 between the frame walls 29; 30 of the frame is firmly screwed to it, it can also be used as a cross member between two serving to pivot the entire doctor device from the anilox roller, each pivotable in the frame walls 29; 30 mounted holders can be arranged.

Denkbar ist es auch, koaxial zueinander ausgerichtet das linke Lager 21 der Changierwelle 19 gemeinsam mit dem Arbeitszylinder 3 auf einer an der Gestellwand 29 befestigten Konsole und das rechte Lager 22 der Changierwelle 19 auf einer an der anderen Gestellwand 30 befestigten Konsole fest anzuordnen.It is also conceivable to coaxially align the left bearing 21 of the traversing shaft 19 together with the working cylinder 3 on a bracket attached to the frame wall 29 and the right bearing 22 of the traversing shaft 19 on a bracket attached to the other frame wall 30.

Der beispielsweise auch in einen Druckeinheitenrechner integrierbare Rechner 12 (Fig. 1) besitzt als einstellbare, ggf. auch mit der Maschinengeschwindigkeit verknüpfbare Eingangsgröße die Changiergeschwindigkeit v und die mit dem Rechner verbundene Steuereinheit 15 neben der Changiergeschwindigkeit v die Zeit t als Ausgangsgrößen für das Servoventil 18, da innerhalb des durch die Sensoren 13; 14 begrenzten Hubbereiches H vom Arbeitszylinder 3 bis zur Richtungsumkehr durch den jeweiligen Sensor 13; 14 jeweils fortlaufend in gleicher Richtung versetzt durchfahrene Teilhubbereiche T, inclusive der zugehörigen, um den Versatz Tv verkürzten rückläufigen Changierbewegung Tc, im Rechner fest programmiert sind (Fig.3). D. h., daß sich bei einer Erhöhung der Changiergeschwindigkeit und damit Hubgeschwindigkeit des Arbeitszylinders die Zeit für letzteren Druckbeaufschlagung zwangsläufig verkürzt.The computer 12 (FIG. 1), which can also be integrated into a printing unit computer, for example, has the traversing speed v as an adjustable input variable, which may also be linked to the machine speed, and the control unit 15 connected to the computer, in addition to the traversing speed v, has the time t as output variables for the servo valve 18 , since within the by the sensors 13; 14 limited stroke range H from the working cylinder 3 to the direction reversal by the respective sensor 13; 14 partial stroke ranges T, which are continuously displaced in the same direction, including the associated reverse traversing movement T c shortened by the offset T v , are permanently programmed in the computer (FIG. 3). This means that with an increase in the traversing speed and thus the lifting speed of the working cylinder, the time for the latter to be pressurized is inevitably shortened.

Wie Fig. 3 zu entnehmen, findet zwar auf Grund des Versaztes Tv der Teilhubbereiche eine Umkehrpunktverlagerung für die Richtungsumkehr der Rakelträgerbewegung statt, jedoch kommt es trotzdem noch zu einer hinsichtlich Einfärbung und Verschleiß von Rasterwalze und Rakel ungünstigen Überlagerung bestimmter Umkehrpunkte. Deshalb wird, wie in Fig. 4 dargestellt, die Zycluszeit des Rechners in einfacher Weise jeweils für eine stochastische Verlagerung Z1 bis Z6 der Umkehrpunkte U1' bis U8' genutzt.As can be seen in FIG. 3, due to the offset T v of the partial stroke areas, a reversal point shift takes place for the reversal of the direction of the doctor blade carrier movement, but there is nevertheless an overlapping of certain reversal points which is unfavorable with regard to inking and wear of the anilox roller and doctor blade. Therefore, as shown in FIG. 4, the cycle time of the computer is used in a simple manner for a stochastic shift Z 1 to Z 6 of the reversal points U 1 'to U 8 '.

Eine technisch aufwendigere Steuerung der Rakelträgerbewegung besteht darin, anstatt der Sensoren 13; 14 in Fig. 1 ein strichpunktiert dargestelltes, dem Rechner über den gesamten Hubbereich H des Arbeitszylinders 3 Wegimpulse zuleitendes Wegmeßsystem 31 anzuordnen, wodurch die Teilbereiche T1 bis T6, inclusive der zugehörigen rückläufigen Changierbewegungen Tc1 bis Tc5, gemäß Fig. 5 unterschiedlich gestaltet werden können.A technically more complex control of the doctor carrier movement is instead of the sensors 13; 14 in Fig. 1 a dash-dotted, the computer over the entire stroke range H of the working cylinder 3 path impulses 31 to arrange, whereby the sub-areas T 1 to T 6 , including the associated retrograde traversing movements T c1 to T c5 , according to FIG. 5 different can be designed.

Claims (14)

Antrieb für eine changierende Rakelvorrichtung für Rasterwalzen als Farbwalzen oder Formzylinder von Rotationsdruckmaschinen mit einem achsparallel zur Rasterwalze verschiebbar angeordneten und von einem doppelseitig über ein gesteuertes Ventil mit einem Druckmittel beaufschlagbaren Arbeitszylinder betätigten Rakelträger, gekennzeichnet dadurch, daß zwei Sensoren (13; 14) mit einem Rechner (12) gekoppelt sind, der über eine Steuereinheit (15) ein Durchflußsteuerventil den durch die Sensoren (13; 14) begrenzten Hubbereich (H) des Arbeitszylinders (3) in mehrere jeweils fortlaufend in gleicher Richtung bis zum eine Richtungsumkehr bewirkenden jeweiligen Sensor (13; 14) versetzte Teilhubbereiche (T) splittend steuert, wobei jeweils die rückläufige Changierbewegung (Tc) im Teilhubbereich (T) um den Versatz (Tv) verkürzt ist.Drive for an oscillating squeegee device for anilox rollers as inking rollers or forme cylinders of rotary printing presses with a squeegee carrier which can be displaced axially parallel to the anilox roller and is actuated by a squeegee carrier actuated on both sides by a controlled valve with a pressure medium, characterized in that two sensors (13; 14) with a computer (12) are coupled, via a control unit (15) a flow control valve the stroke range (H) of the working cylinder (3) delimited by the sensors (13; 14) in several continuously in the same direction until the respective sensor (13 ; 14) controls offset partial stroke ranges (T) in a splitting manner, the retrograde oscillating movement (T c ) in the partial stroke range (T) being shortened by the offset (T v ). Antrieb nach Anspruch 1, gekennzeichnet dadurch, daß anstatt der Sensoren (13; 14) ein Wegmeßsystem (31) für den Hub (H) des Arbeitszylinders (3) mit dem Rechner (12) gekoppelt ist, der programmabhängig über die Steuereinheit (15) das Durchflußsteuerventil den vorgegebenen Hubbereich (H) des Arbeitszylinders (3) hinsichtlich der Changierbewegung in beiden Richtungen in beliebig gestaltbare Teilhubbereiche (T1 bis T6) splittend steuert.Drive according to Claim 1, characterized in that, instead of the sensors (13; 14), a displacement measuring system (31) for the stroke (H) of the working cylinder (3) is coupled to the computer (12), which is program-dependent via the control unit (15) the flow control valve splits the predetermined stroke range (H) of the working cylinder (3) with respect to the traversing movement in both directions into any desired partial stroke ranges (T 1 to T 6 ). Antrieb nach Anspruch 1 und 2, gekennzeichnet dadurch, daß das Durchflußsteuerventil ein hydraulisches Servoventil (18) ist.Drive according to claim 1 and 2, characterized in that the flow control valve is a hydraulic servo valve (18). Antrieb nach Anspruch 1, gekennzeichnet dadurch, daß der jeweilige Umkehrpunkt (U1' bis U6') der Changierbewegung innerhalb der Zycluszeit des Rechners (12) stochastisch verlagert ist.Drive according to claim 1, characterized in that the respective reversal point (U 1 'to U 6 ') of the traversing movement is stochastically shifted within the cycle time of the computer (12). Antrieb nach Anspruch 1 bis 4, gekennzeichnet dadurch, daß die Geschwindigkeit (V) der Changierbewegung als variable Eingangsgröße des Rechners (12) einstellbar ist.Drive according to Claims 1 to 4, characterized in that the speed (V) of the traversing movement can be set as a variable input variable of the computer (12). Antrieb nach Anspruch 1 und 2, gekennzeichnet dadurch, daß der Rechner (12) mit mehreren Rakelträgern (1) deren Changierbewegungen gemeinsam synchron steuernd verbunden ist.Drive according to claims 1 and 2, characterized in that the computer (12) is connected to a plurality of doctor carriers (1) whose traversing movements are jointly controlled in a synchronous manner. Antrieb nach Anspruch 1 bis 6, gekennzeichnet dadurch, daß der Arbeitszylinder (3) mit seiner Kolbenstange (2) am verschiebbar gelagerten Rakelträger (1) befestigt und gemeinsam mit letzterem auf einem Querträger angeordnet ist.Drive according to claims 1 to 6, characterized in that the working cylinder (3) is attached with its piston rod (2) to the displaceably mounted doctor blade carrier (1) and is arranged together with the latter on a cross member. Antrieb nach Anspruch 7, gekennzeichnet dadurch, daß der Querträger aus einer zwischen den Gestellwänden (29; 30) angeordneten, an diesen befestigten Traverse (20) besteht.Drive according to claim 7, characterized in that the cross member consists of one arranged between the frame walls (29; 30) this fixed crossmember (20). Antrieb nach Anspruch 7, gekennzeichnet dadurch, daß der Querträger zwischen zwei jeweils in den Gestellwänden (29; 30) schwenkbar gelagerten Haltern mit diesen fest verbunden angeordnet ist.Drive according to Claim 7, characterized in that the cross member is arranged between two holders which are each pivotably mounted in the frame walls (29; 30) and are connected to them. Antrieb nach Anspruch 1 bis 6, gekennzeichnet dadurch, daß der Arbeitszylinder (3) und der Rakelträger (1) in Changierrichtung ausgerichtet auf beiderseits an den Gestellwänden (29; 30) jeweils innen befestigten Konsolen angeordnet bzw. gelagert sind.Drive according to Claims 1 to 6, characterized in that the working cylinder (3) and the doctor blade carrier (1) are arranged or mounted in the traversing direction on consoles fastened on the inside on both sides of the frame walls (29; 30). Antrieb nach Anspruch 1 bis 10, gekennzeichnet dadurch, daß die Kolbenstange (2) des Arbeitszylinders (3) axial spielfrei über eine Kupplung (4) mit dem Rakelträger (1) verbunden ist.Drive according to Claims 1 to 10, characterized in that the piston rod (2) of the working cylinder (3) is connected to the doctor blade carrier (1) axially without play via a coupling (4). Antrieb nach Anspruch 11, gekennzeichnet dadurch, daß die Kupplung (4) aus zwei miteinander verschraubten, auf der Kolbenstange (2) bzw. dem vorzugsweise als Changierwelle (19) gestalteten Rakelträger (1) befestigten Mitnehmerscheiben (23; 24) besteht.Drive according to claim 11, characterized in that the clutch (4) consists of two driver disks (23; 24) screwed together and fastened on the piston rod (2) or the doctor carrier (1), which is preferably designed as a oscillating shaft (19). Antrieb nach Anspruch 12, gekennzeichnet dadurch, daß zwischen den Mitnehmerscheiben (23; 24) eine elastisch verformbare Scheibe (25) geringen Achsversatz zwischen Kolbenstange (2) und Changierwelle (19) ausgleichend angeordnet ist.Drive according to claim 12, characterized in that an elastically deformable disk (25) with a small axial offset between the piston rod (2) and the traversing shaft (19) is arranged to compensate between the driving disks (23; 24). Antrieb nach Anspruch 1 bis 13, gekennzeichnet dadurch, daß die Sensoren (13; 14) bzw. das Wegmeßsystem gestellfest und ein Positionsgeber (11) die Changierbewegung ausführend angeordnet sind.Drive according to Claims 1 to 13, characterized in that the sensors (13; 14) or the position measuring system are fixed to the frame and a position transmitter (11) is arranged to execute the traversing movement.
EP95100294A 1994-01-18 1995-01-11 Driving mechanism for a vibrating scraper Expired - Lifetime EP0663290B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4401328 1994-01-18
DE4401328A DE4401328A1 (en) 1994-01-18 1994-01-18 Drive for an oscillating doctor device

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EP0663290A1 true EP0663290A1 (en) 1995-07-19
EP0663290B1 EP0663290B1 (en) 1998-08-12

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EP95100294A Expired - Lifetime EP0663290B1 (en) 1994-01-18 1995-01-11 Driving mechanism for a vibrating scraper

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EP (1) EP0663290B1 (en)
DE (2) DE4401328A1 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
EP1531043A1 (en) * 2003-11-14 2005-05-18 Fischer & Krecke Gmbh & Co. Process and device for moving a doctor blade
CN103240963A (en) * 2013-05-31 2013-08-14 昆山欧莱特印刷机械工业有限公司 Intelligent ink scraper system

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DE102005061915A1 (en) * 2005-12-23 2007-07-05 Koenig & Bauer Aktiengesellschaft Method for operating a short inking system used in a printing machine comprises moving a grid roller according to a twist of the grid roller and contacting a tensioning channel of an ink application roller with the grid roller
CN108909180B (en) * 2018-06-28 2023-10-17 河南宝钢制罐有限公司 Ink transfer dividing roller test system and method for ink unit of metal can printer
DE102019103789A1 (en) * 2019-02-05 2020-08-06 Koenig & Bauer Ag Printing unit and printing machine with a printing unit

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FR2284451A1 (en) * 1974-09-11 1976-04-09 Roland Offsetmaschf IMPROVEMENTS TO INKING DEVICES ON PRINTING PRESSES

Cited By (4)

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EP1531043A1 (en) * 2003-11-14 2005-05-18 Fischer & Krecke Gmbh & Co. Process and device for moving a doctor blade
US7114437B2 (en) 2003-11-14 2006-10-03 Fischer & Krecke Gmbh & Co. Method and apparatus for shifting a doctor blade
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CN103240963A (en) * 2013-05-31 2013-08-14 昆山欧莱特印刷机械工业有限公司 Intelligent ink scraper system

Also Published As

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DE59503099D1 (en) 1998-09-17
DE4401328A1 (en) 1995-07-20
EP0663290B1 (en) 1998-08-12

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