EP0396904B1 - Device for lifting and lowering an impression cylinder acting on a form cylinder - Google Patents

Device for lifting and lowering an impression cylinder acting on a form cylinder Download PDF

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Publication number
EP0396904B1
EP0396904B1 EP90106383A EP90106383A EP0396904B1 EP 0396904 B1 EP0396904 B1 EP 0396904B1 EP 90106383 A EP90106383 A EP 90106383A EP 90106383 A EP90106383 A EP 90106383A EP 0396904 B1 EP0396904 B1 EP 0396904B1
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EP
European Patent Office
Prior art keywords
cylinder
spindle nut
screw spindle
pinion
bearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90106383A
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German (de)
French (fr)
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EP0396904A2 (en
EP0396904A3 (en
Inventor
Herbert Lübke
Wolfgang Knapheide
Volker Schröder
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Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Publication of EP0396904A2 publication Critical patent/EP0396904A2/en
Publication of EP0396904A3 publication Critical patent/EP0396904A3/en
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Publication of EP0396904B1 publication Critical patent/EP0396904B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/34—Cylinder lifting or adjusting devices

Definitions

  • the invention relates to a device for turning on and off a counter-pressure cylinder acting on a forme cylinder of a rotary printing press and for carrying out its long stroke movement for the purpose of changing the forme cylinder, with spindles for raising and lowering the bearings of the counter-pressure cylinder and with one pressure medium piston each acting on the spindles -Cylinder unit for pressing the impression cylinder against the forme cylinder.
  • the object of the invention is therefore to provide a device of the type specified at the outset, which has a simpler structure and can therefore be manufactured more cost-effectively.
  • each spindle nut tubular and a non-rotatable pinion driven by a motor is arranged on a tube section of the spindle nut with the same outside diameter, but is axially displaceably guided over a limited distance and that the pinion hub is mounted fixed to the frame.
  • the device according to the invention consists only of a pinion driving the spindle nut, which in the manner on the spindle nut is rotatably but axially displaceable over a limited distance between stops, that the impression cylinder is supported on the form cylinder during printing operation, without additionally Support of the spindle nut to be loaded on the housing, so that the desired pressure of the impression cylinder on the forme cylinder can be set essentially solely by the pressure medium-piston-cylinder unit, which will usually be a pneumatic cylinder.
  • each pressure medium-piston-cylinder unit is expediently articulated to the end region of a lever which is mounted in the frame and which is supported on the spindle nut between the articulation points.
  • This configuration enables the counter-pressure cylinder to be loaded by the two piston-cylinder units in a structurally simple manner.
  • the lever can be supported by a thrust bearing on a collar of the tubular spindle nut.
  • the lever is preferably clamped between two thrust bearings of the spindle nut, of which the upper one is loaded by a compression spring.
  • each of the bearings is provided with a device for compensating for the weight of the bearing, the parts connected to it and the impression cylinder.
  • This compensation device enables the pressure of the impression cylinder against the Forme cylinder that can only be adjusted with precision by the piston-cylinder units because the dead weight of the impression cylinder and the bearings is eliminated.
  • the compensation device can be formed from springs and expediently consists of a pneumatic piston-cylinder unit, which acts similarly to a tension spring that can be adjusted to a specific force.
  • Each of the bearings is expediently attached to the piston rod of the pneumatic piston-cylinder unit by a rope running over a deflection roller.
  • a switch which is fixed to the frame which in the pressure position monitors a gap between the hub of the pinion or a part connected to it and a counter-stop of the spindle nut.
  • the counter stop can be formed by a collar of the tubular spindle nut.
  • a housing 3 or 4 is attached to each of the two side walls 1, 2 of an intaglio printing machine. Since the two sides of the rotogravure printing press are of identical design, only the left side of the rotogravure printing press is explained in more detail below.
  • the housing 3, 4 has an upper through-bore 6 provided with a collar 5 and the lower part of the housing has a through-bore 7.
  • a roller bearing 8 is supported on the inner step formed by the collar 5, while a further roller bearing 9 is held by a cover 10 which closes the bore 7 at the bottom.
  • Both bearings 8 and 9 support the hub of a pinion 11 that is rotatably connected via a feather key 12 to a tube 13 which has an internal thread and forms a spindle nut.
  • the keys 12 receiving grooves are longer than the key, so that the pinion 11 is axially displaceable relative to the tube 13 over a small distance. The displacement of the pinion 11 relative to the tube 13 is limited by stops.
  • this tube 13 is in engagement with the external thread of a threaded spindle 14.
  • the latter is firmly connected to the carrier plate 15 for the pressure roller or for the impression roller 16.
  • the tube 13 is gripped at a distance by a lever 17. Which is pivotally mounted at point 18, the pivoting movement being achieved via a pneumatic piston-cylinder unit 19.
  • This pneumatic piston-cylinder unit 19 is connected to the side wall 1 in a manner not shown.
  • the lever 17 has two opposing dome-shaped recesses 20 and 21, in each of which a bearing cover of a thrust bearing 22 or 23 is mounted.
  • the second bearing cap belonging to the upper bearing 22 is pressed via a spring 24 and a nut 25 screwed onto the tube 13 in such a way that the Lever 17 associated bearing cover of the thrust bearing 23 always creates play on the collar 25 of the tube 13, which forms the second bearing cover of the thrust bearing 23.
  • a motor 27 is connected to the housing 3, on the drive shaft 28 a drive pinion 29 is attached, which is in drive connection with the pinion 11 via a toothed belt 30.
  • the weight of the carrier plate 15 is borne by a piston-cylinder unit 31, the piston rod 32 of which is connected to a cable 33 which is deflected to the carrier plate 15 via a roller 34.
  • the pressure with which the piston-cylinder unit 31 is acted on is adjustable so that a very precisely defined proportion of the weight of the carrier plate 15 and of the impression roller 16 can be accommodated.
  • FIGS. 1 and 2 show the printing position in which the collar 26 is at a distance from the bearing 8. If a new forme cylinder 35 is to be used, the motor 27 is first switched on, so that the tube 13 is rotated via the pinion 29, the toothed belt 30, the pinion 11 and the feather key 12. The direction of rotation is selected such that the threaded spindle 14 moves upward in the direction of arrow A, the collar 26 first resting against the bearing 8 and lifting the impression roller 16 from the forme cylinder 35 via the carrier plate 15. After a certain stroke, which is determined by the microswitch 37, the motor 27 is switched off (FIG. 1).
  • the motor 27 is driven in opposite directions in such a way that the threaded spindle 14 counteracts the elements already described above Direction of arrow of arrow A after is moved down until the impression roller 16 lies on the newly inserted forme cylinder. With further rotation of the motor 27, the threaded spindle 14 cannot move downward. This means that instead the tube 13 moves upwards and the collar 26 lifts up from the bearing. The lever 18 is pivoted clockwise around its bearing point until it actuates the microswitch 36 (see FIG. 2), as a result of which the motor 27 is then stopped.
  • the pneumatic piston-cylinder unit 19 Since the pneumatic piston-cylinder unit 19 is constantly under a precisely defined set pressure, this precisely set pressure is transferred to the impression cylinder, regardless of the diameter of the impression cylinder and the diameter of the forme cylinder. Should the gap between the collar 26 and the bearing 8 decrease due to an error during the printing process, the microswitch 36 is actuated via the lever 17, whereby, for example, an optical or acoustic warning device is switched on. The operator must then switch on the motor 27 via a device (not shown) until a gap between the collar 26 and the bearing 8 is again established.
  • the pressure-on and pressure-off movements of the counter-pressure cylinder 16 take place by means of an NC control via the motors 27.
  • the threaded spindle 14 is protected by bellows 38 and 39 against external influences and in particular against dirt.

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

Description

Die Erfindung betrifft eine Vorrichtung zum Druckan- und Druckabstellen eines auf einen Formzylinder wirkenden Gegendruckzylinders einer Rotationsdruckmaschine sowie zum Ausführen von dessen Weithubbewegung zum Zwecke des Formzylinderwechsels, mit Spindeln zum Anheben und Absenken der Lager des Gegendruckzylinders und mit je einer auf die Spindeln wirkenden Druckmittel-Kolben-Zylinder-Einheit zum Andrücken des Gegendruckzylinders an den Formzylinder.The invention relates to a device for turning on and off a counter-pressure cylinder acting on a forme cylinder of a rotary printing press and for carrying out its long stroke movement for the purpose of changing the forme cylinder, with spindles for raising and lowering the bearings of the counter-pressure cylinder and with one pressure medium piston each acting on the spindles -Cylinder unit for pressing the impression cylinder against the forme cylinder.

Eine aus der DE-PS 33 37 309 bekannte Vorrichtung dieser Art, die sich in der Praxis gut bewehrt hat, besitzt eine verhältnismäßig aufwendige Konstruktion, so daß diese zu einer Verteuerung der Druckmaschine beiträgt.A device of this type known from DE-PS 33 37 309, which has proven itself well in practice, has a relatively complex construction, so that this contributes to an increase in the cost of the printing press.

Aufgabe der Erfindung ist es daher, eine Vorrichtung der eingangs angegebenen Art zu schaffen, die einen einfacheren Aufbau besitzt und sich daher kostengünstiger herstellen läßt.The object of the invention is therefore to provide a device of the type specified at the outset, which has a simpler structure and can therefore be manufactured more cost-effectively.

Erfindungsgemäß wird diese Aufgabe bei einer Vorrichtung der gattungsgemäßen Art dadurch gelöst, daß jede Spindelmutter rohrförmig ausgebildet und auf einem Rohrabschnitt der Spindelmutter mit gleichem Außendurchmesser ein von einem Motor antreibbares Ritzel undrehbar, aber über eine begrenzte Strecke axial verschieblich geführt angeordnet ist und daß die Ritzelnabe gestellfest gelagert ist. Die erfindungsgemäße Vorrichtung besteht in ihrer einfachsten Form nur aus einem die Spindelmutter antreibenden Ritzel, das in der Weise auf der Spindelmutter undrehbar aber über eine begrenzte Strecke zwischen Anschlägen axial verschieblich geführt ist, daß sich der Gegendruckzylinder im Druckbetrieb auf dem Formzylinder abstützt, ohne zusätzlich durch Abstützung der Spindelmutter an dem Gehäuse belastet zu sein, so daß sich der gewünschte Andruck des Gegendruckzylinders an dem Formzylinder im wesentlichen allein durch die Druckmittel-Kolben-Zylinder-Einheit, bei der es sich üblicherweise um einen Pneumatikzylinder handeln wird, einstellen läßt.According to the invention, this object is achieved in a device of the generic type in that each spindle nut tubular and a non-rotatable pinion driven by a motor is arranged on a tube section of the spindle nut with the same outside diameter, but is axially displaceably guided over a limited distance and that the pinion hub is mounted fixed to the frame. In its simplest form, the device according to the invention consists only of a pinion driving the spindle nut, which in the manner on the spindle nut is rotatably but axially displaceable over a limited distance between stops, that the impression cylinder is supported on the form cylinder during printing operation, without additionally Support of the spindle nut to be loaded on the housing, so that the desired pressure of the impression cylinder on the forme cylinder can be set essentially solely by the pressure medium-piston-cylinder unit, which will usually be a pneumatic cylinder.

Zweckmäßigerweise ist die Kolbenstange jeder Druckmittel-Kolben-Zylinder-Einheit an den Endbereich je eines im Gestell gelagerten Hebels angelenkt, der sich zwischen den Anlenkstellen auf die Spindelmutter abstützt. Diese Ausgestaltung ermöglicht es, in konstruktiv einfacher Weise den Gegendruckzylinder durch die beiden Kolben-Zylinder-Einheiten zu belasten.The piston rod of each pressure medium-piston-cylinder unit is expediently articulated to the end region of a lever which is mounted in the frame and which is supported on the spindle nut between the articulation points. This configuration enables the counter-pressure cylinder to be loaded by the two piston-cylinder units in a structurally simple manner.

Der Hebel kann sich über ein Drucklager auf einem Bund der rohrförmigen Spindelmutter abstützen. Vorzugsweise ist der Hebel zwischen zwei Drucklagern der Spindelmutter eingespannt, von denen das obere von einer Druckfeder belastet ist.The lever can be supported by a thrust bearing on a collar of the tubular spindle nut. The lever is preferably clamped between two thrust bearings of the spindle nut, of which the upper one is loaded by a compression spring.

Nach einer besonders vorteilhaften Ausgestaltung ist vorgesehen, daß jedes der Lager mit einer Einrichtung zum Kompensieren des Gewichts des Lagers, der mit diesem verbundenen Teile und des Gegendruckzylinders versehen ist. Diese Kompensationseinrichtung ermöglicht es, daß der Andruck des Gegendruckzylinders an den Formzylinder der feinfühlig nur durch die Kolben-Zylinder-Einheiten eingestellt werden kann, weil das Eigengewicht des Gegendruckzylinders und der Lager aufgehoben ist. Die Kompensationseinrichtung kann aus Federn gebildet sein und besteht zweckmäßigerweise aus einer pneumatischen Kolben-Zylinder-Einheit, die ähnlich wie eine auf eine bestimmte Kraft einstellbare Zugfeder wirkt.According to a particularly advantageous embodiment, it is provided that each of the bearings is provided with a device for compensating for the weight of the bearing, the parts connected to it and the impression cylinder. This compensation device enables the pressure of the impression cylinder against the Forme cylinder that can only be adjusted with precision by the piston-cylinder units because the dead weight of the impression cylinder and the bearings is eliminated. The compensation device can be formed from springs and expediently consists of a pneumatic piston-cylinder unit, which acts similarly to a tension spring that can be adjusted to a specific force.

Zweckmäßigerweise ist jedes der Lager durch ein über eine Umlenkrolle laufendes Seil an die Kolbenstange der pneumatischen Kolben-Zylinder-Einheit angehängt.Each of the bearings is expediently attached to the piston rod of the pneumatic piston-cylinder unit by a rope running over a deflection roller.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß ein gestellfester Schalter vorgesehen ist, der in der Druckstellung einen Spalt zwischen der Nabe des Ritzels bzw. einem mit dieser verbundenen Teil und einem Gegenanschlag der Spindelmutter überwacht. Der Gegenanschlag kann durch einen Bund der rohrförmigen Spindelmutter gebildet sein.In a further embodiment of the invention it is provided that a switch which is fixed to the frame is provided, which in the pressure position monitors a gap between the hub of the pinion or a part connected to it and a counter-stop of the spindle nut. The counter stop can be formed by a collar of the tubular spindle nut.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert. In dieser zeigt

Fig.1
eine Vorderansicht der Vorrichtung zum Druckan- und Druckabstellen eines auf einen Formzylinder wirkenden Gegendruckzylinders in schematischer Darstellung,
Fig.2
einen Schnitt durch die Vorrichtung längs der Linie II-II in Fig.1 mit an den Formzylinder angestelltem Gegendruckzylinder und
Fig.3
eine vergrößerte Darstellung eines Ausschnitts aus Fig.2 mit von dem Formzylinder abgehobenem Gegendruckzylinder.
An embodiment of the invention is explained below with reference to the drawing. In this shows
Fig. 1
2 shows a front view of the device for printing on and off of a counter-pressure cylinder acting on a forme cylinder in a schematic illustration,
Fig. 2
a section through the device along the line II-II in Figure 1 with the impression cylinder and the impression cylinder
Fig. 3
an enlarged view of a section of Figure 2 with the impression cylinder lifted from the forme cylinder.

An jeder der beiden Seitenwände 1,2 einer Tiefdruckmaschine ist jeweils ein Gehäuse 3 bzw. 4 befestigt. Da die beiden Seiten der Tiefdruckmaschine spiegelbildlich gleich ausgebildet sind, wird im folgenden nur die linke Seite der Tiefdruckmaschine näher erläutert.A housing 3 or 4 is attached to each of the two side walls 1, 2 of an intaglio printing machine. Since the two sides of the rotogravure printing press are of identical design, only the left side of the rotogravure printing press is explained in more detail below.

Insbesondere aus Fig.3 ist ersichtlich, daß das Gehäuse 3,4 eine obere mit einem Kragen 5 versehene Durchgangsbohrung 6 und der untere Teil des Gehäuses eine Durchgangsbohrung 7 aufweist. Auf der inneren durch den Kragen 5 gebildeten Stufe stützt sich ein Wälzlager 8 ab, während ein weiteres Wälzlager 9 durch einen Deckel 10 gehalten ist, der die Bohrung 7 nach unten hin abschließt. Beide Lager 8 und 9 lagern die Nabe eines Ritzels 11, daß über eine Paßfeder 12 drehfest mit einem Rohr 13 verbunden ist, welches ein Innengewinde aufweist und eine Spindelmutter bildet. Die die Paßfeder 12 aufnehmenden Nuten sind länger ausgebildet als die Paßfeder, so daß das Ritzel 11 relativ zu dem Rohr 13 über eine kleine Strecke axial verschieblich ist. Der Verschiebeweg des Ritzels 11 relativ zu dem Rohr 13 ist durch Anschläge begrenzt. Das Innengewinde dieses Rohres 13 steht im Eingriff mit dem Außengewinde einer Gewindespindel 14. Letztere ist fest verbunden mit der Trägerplatte 15 für die Anpreßwalze bzw. für den Presseur 16. Oberhalb des Gehäuses 3 wird das Rohr 13 mit Abstand von einem Hebel 17 umgriffen. Welcher im Punkte 18 schwenkbar gelagert ist wobei die Schwenkbewegung über eine pneumatische Kolben-Zylinder-Einheit 19 erreicht wird. Diese pneumatische Kolben-Zylinder-Einheit 19 ist auf nicht dargestellte Art und Weise mit der Seitenwand 1 verbunden. Der Hebel 17 weist zwei einander gegenüberliegende kalottenförmige Ausnehmungen 20 und 21 auf, in denen jeweils ein Lagerdeckel eines Drucklagers 22 bzw. 23 gelagert ist. Der zweite zum oberen Lager 22 gehörende Lagerdeckel wird über eine Feder 24 und eine auf das Rohr 13 aufgeschraubte Mutter 25 derart angepreßt, daß sich der dem Hebel 17 zugreordnete Lagerdeckel des Drucklagers 23 stets spielfrei an den Kragen 25 des Rohres 13 anlegt, der den zweiten Lagerdeckel des Drucklagers 23 bildet. Aus der Figur 1 ist zu ersehen, daß mit dem Gehäuse 3 ein Motor 27 verbunden ist, auf dessen Antriebswelle 28 ein Antriebsritzel 29 befestigt ist, welches über einen Zahnriemen 30 mit dem Ritzel 11 in Antriebsverbindung steht.It can be seen in particular from FIG. 3 that the housing 3, 4 has an upper through-bore 6 provided with a collar 5 and the lower part of the housing has a through-bore 7. A roller bearing 8 is supported on the inner step formed by the collar 5, while a further roller bearing 9 is held by a cover 10 which closes the bore 7 at the bottom. Both bearings 8 and 9 support the hub of a pinion 11 that is rotatably connected via a feather key 12 to a tube 13 which has an internal thread and forms a spindle nut. The keys 12 receiving grooves are longer than the key, so that the pinion 11 is axially displaceable relative to the tube 13 over a small distance. The displacement of the pinion 11 relative to the tube 13 is limited by stops. The internal thread of this tube 13 is in engagement with the external thread of a threaded spindle 14. The latter is firmly connected to the carrier plate 15 for the pressure roller or for the impression roller 16. Above the housing 3, the tube 13 is gripped at a distance by a lever 17. Which is pivotally mounted at point 18, the pivoting movement being achieved via a pneumatic piston-cylinder unit 19. This pneumatic piston-cylinder unit 19 is connected to the side wall 1 in a manner not shown. The lever 17 has two opposing dome-shaped recesses 20 and 21, in each of which a bearing cover of a thrust bearing 22 or 23 is mounted. The second bearing cap belonging to the upper bearing 22 is pressed via a spring 24 and a nut 25 screwed onto the tube 13 in such a way that the Lever 17 associated bearing cover of the thrust bearing 23 always creates play on the collar 25 of the tube 13, which forms the second bearing cover of the thrust bearing 23. From Figure 1 it can be seen that a motor 27 is connected to the housing 3, on the drive shaft 28 a drive pinion 29 is attached, which is in drive connection with the pinion 11 via a toothed belt 30.

Aus der Figur 2 ist zu erkennen, daß das Gewicht der Trägerplatte 15 von einer Kolben-Zylinder-Einheit 31 getragen wird, deren Kolbenstange 32 mit einem Seil 33 verbunden ist, welches umgelenkt über eine Rolle 34 mit der Trägerplatte 15 verbunden ist. Der Druck, mit dem die Kolben-Zylinder-Einheit 31 beaufschlagt wird, ist einstellbar, so daß ein ganz genau definierter Anteil des Gewichts der Trägerplatte 15 sowie des Presseurs 16 aufgenommen werden kann.It can be seen from FIG. 2 that the weight of the carrier plate 15 is borne by a piston-cylinder unit 31, the piston rod 32 of which is connected to a cable 33 which is deflected to the carrier plate 15 via a roller 34. The pressure with which the piston-cylinder unit 31 is acted on is adjustable so that a very precisely defined proportion of the weight of the carrier plate 15 and of the impression roller 16 can be accommodated.

In den Figuren 1 und 2 ist die Druckposition dargestellt, in der der Kragen 26 einen Abstand zum Lager 8 aufweist. Soll nun ein neuer Formzylinder 35 eingesetzt werden, wird zunächst einmal der Motor 27 eingeschaltet, so daß über das Ritzel 29, den Zahnriemen 30, das Ritzel 11 und die Paßfeder 12 das Rohr 13 in Drehung versetzt wird. Die Drehrichtung ist dabei so gewählt, daß sich die Gewindespindel 14 in Pfeilrichtung A nach oben bewegt, wobei sich zunächst einmal der Kragen 26 gegen das Lager 8 anlegt und den Presseur 16 über die Trägerplatte 15 vom Formzylinder 35 abhebt. Nach einem gewissen Hub, der bestimmt wird durch den Mikroschalter 37, wird der Motor 27 abgeschaltet (Figur 1). Sobald nun ein anderer Formzylinder und gegebenenfalls auch noch ein anderer Presseur eingelegt worden sind, die denselben oder auch einen anderen Durchmesser aufweisen können als die zuvor eingesetzten, wird der Motor 27 gegensinnig derart angetrieben, daß über die zuvor schon beschriebenen Elemente die Gewindespindel 14 entgegen der Pfeilrichtung des Pfeiles A nach unten bewegt wird, bis sich der Presseur 16 auf den neu eingesetzten Formzylinder auflegt. Bei weiterer Drehung des Motors 27 kann sich folglich dann die Gewindespindel 14 nicht weiter nach unten bewegen. Dies bedeutet, daß sich statt dessen das Rohr 13 nach oben bewegt und sich der Kragen 26 vom Lager abhebt. Dabei wird der Hebel 18 um seinen Lagerpunkt im Uhrzeigersinn so weit verschwenkt, bis dieser den Mikroschalter 36 betätigt (siehe Figur 2), wodurch dann der Motor 27 gestoppt wird. Da die pneumatische Kolben-Zylinder-Einheit 19 ständig unter einem genau definierten eingestellten Druck steht, wird dieser genau eingestellte Druck auf den Presseur übertragen, und zwar unabhängig von Durchmesser des Presseurs und vom Durchmesser des Formzylinders. Sollte sich aufgrund eines Fehlers während des Druckvorgangs der Spalt zwischen dem Kragen 26 und dem Lager 8 verkleinern, wird über dem Hebel 17 der Mikroschalter 36 betätigt, wodurch beispielsweise eine optische oder akustische Warneinrichtung eingeschaltet wird. Die Bedienungsperson muß dann über eine nicht dargestellte Einrichtung den Motor 27 solange einschalten, bis sich wieder ein Spalt zwischen Kragen 26 und Lager 8 einstellt.FIGS. 1 and 2 show the printing position in which the collar 26 is at a distance from the bearing 8. If a new forme cylinder 35 is to be used, the motor 27 is first switched on, so that the tube 13 is rotated via the pinion 29, the toothed belt 30, the pinion 11 and the feather key 12. The direction of rotation is selected such that the threaded spindle 14 moves upward in the direction of arrow A, the collar 26 first resting against the bearing 8 and lifting the impression roller 16 from the forme cylinder 35 via the carrier plate 15. After a certain stroke, which is determined by the microswitch 37, the motor 27 is switched off (FIG. 1). As soon as another forme cylinder and possibly also another impression roller have been inserted, which may have the same or a different diameter than the ones previously used, the motor 27 is driven in opposite directions in such a way that the threaded spindle 14 counteracts the elements already described above Direction of arrow of arrow A after is moved down until the impression roller 16 lies on the newly inserted forme cylinder. With further rotation of the motor 27, the threaded spindle 14 cannot move downward. This means that instead the tube 13 moves upwards and the collar 26 lifts up from the bearing. The lever 18 is pivoted clockwise around its bearing point until it actuates the microswitch 36 (see FIG. 2), as a result of which the motor 27 is then stopped. Since the pneumatic piston-cylinder unit 19 is constantly under a precisely defined set pressure, this precisely set pressure is transferred to the impression cylinder, regardless of the diameter of the impression cylinder and the diameter of the forme cylinder. Should the gap between the collar 26 and the bearing 8 decrease due to an error during the printing process, the microswitch 36 is actuated via the lever 17, whereby, for example, an optical or acoustic warning device is switched on. The operator must then switch on the motor 27 via a device (not shown) until a gap between the collar 26 and the bearing 8 is again established.

Da das gesamte Gewicht der Trägerplatte 15 und des Presseurs 16 von der Kolben-Zylinder-Einheit 31 getragen wird, kann unabhängig vom Gewicht eine sehr, feinfühlige und exakte Druckeinstellung erfolgen.Since the entire weight of the carrier plate 15 and the impression roller 16 is borne by the piston-cylinder unit 31, a very, sensitive and exact pressure setting can take place regardless of the weight.

Die Druckan- und Druckabstellbewegungen des Gegendruckzylinders 16 erfolgt durch eine NC-Steuerung über die Motoren 27.The pressure-on and pressure-off movements of the counter-pressure cylinder 16 take place by means of an NC control via the motors 27.

Die Gewindespindel 14 ist durch Faltenbalge 38 und 39 gegen äußere Einflüsse und insbesondere gegen Schmutz geschützt.The threaded spindle 14 is protected by bellows 38 and 39 against external influences and in particular against dirt.

Claims (9)

  1. A device for starting and stopping the pressure of an impression cylinder acting on a form cylinder of a rotary printing press, as well as for executing its wide travel movement for the purpose of changing the form cylinder,
    with screw spindles for lifting and lowering the bearings of the impression cylinder and
    with a pneumatic piston-cylinder unit acting on the screw spindles for pressing the impression cylinder onto the form cylinder,
    characterized in that
    each screw spindle nut (13) has a tubular shape and that on a tubular section of the screw spindle nut (13), a pinion (11) with the same outer diameter is arranged secured against rotation but being guided for displacement over a limited distance, which pinion is drivable by a motor (27), and that the pinion hub is mounted fixed to the frame.
  2. A device according to claim 1, characterized in that the piston rod of each pneumatic piston-cylinder unit (19) is articulated in the end zones of one lever (17) each, which is mounted in the frame and bears between the articulation points on the screw spindle nut (13).
  3. A device according to claim 2, characterized in that the lever (17) bears via a thrust bearing (23) on a flange (26) of the tubular screw spindle nut (13).
  4. A device according to claim 2 or 3, characterized in that the lever (17) is clamped between two thrust bearings (22, 23) of the screw spindle nut (13), the upper bearing (22) whereof is loaded by a compression spring (24).
  5. A device according to one of claims 1 to 4, characterized in that each of the bearings (15) is provided with a device for compensating the weight of the bearing, of the components connected thereto and of the impression cylinder (16).
  6. A device according to claim 5, characterized in that the compensating device consists of a pneumatic piston-cylinder unit (31).
  7. A device according to claim 6, characterized in that each bearing is suspended on the piston rod (32) of the pneumatic piston-cylinder unit (31) by means of a cable (33) running over a guide pulley (34).
  8. A device according to one of claims 1 to 7, characterized in that provision is made for a switch (36) fixed to the frame which in the printing position monitors a gap between the hub of the pinion (11) or of a component connected to the said hub and of a counter stop of the screw spindle nut (13).
  9. A device according to claim 8, characterized in that the counter stop is formed by a flange (26) of the tubular screw spindle nut (13).
EP90106383A 1989-05-11 1990-04-03 Device for lifting and lowering an impression cylinder acting on a form cylinder Expired - Lifetime EP0396904B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3915481A DE3915481A1 (en) 1989-05-11 1989-05-11 DEVICE FOR STARTING AND LIFTING OFF A BACK PRESSURE CYLINDER ON A FORM CYLINDER
DE3915481 1989-05-11

Publications (3)

Publication Number Publication Date
EP0396904A2 EP0396904A2 (en) 1990-11-14
EP0396904A3 EP0396904A3 (en) 1991-06-12
EP0396904B1 true EP0396904B1 (en) 1994-02-09

Family

ID=6380488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90106383A Expired - Lifetime EP0396904B1 (en) 1989-05-11 1990-04-03 Device for lifting and lowering an impression cylinder acting on a form cylinder

Country Status (4)

Country Link
US (1) US5109768A (en)
EP (1) EP0396904B1 (en)
JP (1) JPH035145A (en)
DE (2) DE3915481A1 (en)

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DE4032318A1 (en) * 1990-05-15 1991-11-21 Windmoeller & Hoelscher DEVICE FOR APPLYING LIQUID MEDIA ON A RAILWAY
FR2672542B1 (en) * 1991-02-11 1994-02-11 Komori Chambon Sa DEVICE FOR DETECTING, IN A MACHINE, THE CONTACT POSITION OF TWO PARALLEL AXIS CYLINDERS.
JP2585995Y2 (en) * 1992-10-01 1998-11-25 株式会社小森コーポレーション Body attachment / detachment device
IT1299644B1 (en) * 1998-02-05 2000-03-24 Uteco Spa Roto Flexo & Convert MACHINE FOR ROTOCALCO PRINTING AND FOR PAINTING UP TO EIGHT COLORS
DE19805898C2 (en) * 1998-02-13 2003-09-18 Roland Man Druckmasch Printing unit for a web-fed rotary printing machine
DE19943027C5 (en) * 1998-10-28 2016-11-17 Heidelberger Druckmaschinen Ag Positioning device in a printing machine
SE514057C2 (en) 1999-03-30 2000-12-18 Tetra Laval Holdings & Finance Method and apparatus for locking rollers in a printing plant
DE19955223C2 (en) * 1999-11-17 2002-09-12 Stork Gmbh Printing device for simultaneous printing on both sides of sheet-shaped rigid or flexible substrates or substrate webs
DE19963944C1 (en) * 1999-12-31 2001-06-13 Koenig & Bauer Ag Method to adjust cylinders of printing machine; involves moving abutment to limit stroke of axle holder for adjustable cylinder at space from base plate and applying adjusting and holding forces
DE10255807B4 (en) * 2002-11-29 2012-02-02 Manroland Ag Positioning device for functional devices of printing machines
NL1022048C2 (en) * 2002-12-02 2004-06-03 Mps Holding B V Printing module as well as a printing machine provided with such a printing module.
DE102004063944B4 (en) 2004-04-05 2008-04-10 Koenig & Bauer Aktiengesellschaft Printing units of a web-fed rotary printing press
DE102004037889B4 (en) 2004-04-05 2006-05-11 Koenig & Bauer Ag Device for supporting a cylinder and printing unit with at least three together as a printing unit acting cylinders
BRPI0509605A (en) 2004-04-05 2007-09-18 Koenig & Bauer Ag printer unit of a rotary roll printer
ITVR20100131A1 (en) * 2010-06-30 2011-12-31 Uteco Converting Spa FLEXOGRAPHIC PRINTING MACHINE

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US2607292A (en) * 1948-05-29 1952-08-19 Hoe & Co R Rotogravure impression mechanism
US3272122A (en) * 1961-03-21 1966-09-13 Publication Corp Method of adjusting a foreshortened impression roller
US3131631A (en) * 1962-01-08 1964-05-05 Inta Roto Machine Company Inc Impression roll support and control means
DE1235333B (en) * 1964-01-29 1967-03-02 Windmoeller & Hoelscher Aniline printing machine
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DE2638750C3 (en) * 1976-08-27 1981-01-08 Windmoeller & Hoelscher, 4540 Lengerich Device for turning on and off printing and for executing a long stroke movement of an impression roller acting on the forme cylinder of a rotogravure printing machine, which is necessary for the cylinder change
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Also Published As

Publication number Publication date
DE3915481A1 (en) 1990-12-13
US5109768A (en) 1992-05-05
JPH035145A (en) 1991-01-10
EP0396904A2 (en) 1990-11-14
EP0396904A3 (en) 1991-06-12
DE59004540D1 (en) 1994-03-24

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