EP0054178B1 - Device for applying and withdrawing a pressure cylinder acting on the form cylinder in an intaglio printing press and for executing a major lifting motion of this pressure cylinder to enable the changing of the form cylinder - Google Patents

Device for applying and withdrawing a pressure cylinder acting on the form cylinder in an intaglio printing press and for executing a major lifting motion of this pressure cylinder to enable the changing of the form cylinder Download PDF

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Publication number
EP0054178B1
EP0054178B1 EP81109439A EP81109439A EP0054178B1 EP 0054178 B1 EP0054178 B1 EP 0054178B1 EP 81109439 A EP81109439 A EP 81109439A EP 81109439 A EP81109439 A EP 81109439A EP 0054178 B1 EP0054178 B1 EP 0054178B1
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EP
European Patent Office
Prior art keywords
pressure
cylinder
movement
fluid
spring
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Expired
Application number
EP81109439A
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German (de)
French (fr)
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EP0054178A1 (en
Inventor
Peter Klaus
Jürgen Westerkamp
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Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Publication of EP0054178A1 publication Critical patent/EP0054178A1/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
    • B41F13/40—Cylinder lifting or adjusting devices fluid-pressure operated

Definitions

  • the invention relates to a device for turning on and turning off the pressure and for carrying out a long-stroke movement necessary for the cylinder change of an impression cylinder acting on the forme cylinder of a rotogravure printing machine, the two pin bearings of which are connected to a double-acting pressure medium cylinder serving to raise and lower the impression cylinder and by means of a cylinder mounted synchronizing shaft, which is provided with pinions which mesh with rack-fixed racks, are coupled to one another.
  • a drag pin is fastened to one of the journal bearings and engages with at least one play corresponding to the pressure shut-off stroke in a groove of a sliding plate which is displaceable in the machine frame parallel to the journal bearings.
  • a switching valve is fastened to the sliding plate, the tappet of which can be actuated by the cam surface of a cam which is at most movable relative to the switching valve via the play and which is fastened to the journal bearing.
  • the switching valve is bridged, while during the pressure shut-off movement, pressure medium is supplied to the pressure medium cylinders via the switching valve in such a way that this blocks the pressure medium supply to the stroke chambers of the pressure medium cylinders at the end of the short-stroke pressure stop movement.
  • the pressure shut-off movement is ended when the switching valve blocks the flow of the pressure medium or when the switching valve has reached an equilibrium state between the weight of the impression cylinder, its bearings and the piston of the lifting cylinder.
  • the switching valve is unable to hold the impression cylinder in a precisely defined position at the end of the pressure shut-off movement, because it is pressurized with the full pressure medium and, in the event of pressure fluctuations and as a result of other interferences, leads to a slight uncontrollable pressure medium flow through the switching valve can come so that the impression roller does not stand still in its pressure cut-off, but dances up and down to the extent that the switching valve alternately releases or blocks the flow of the pressure medium.
  • This unstable pressure shutdown of the impression roller leads to different web tensions, which can impair perfect printing.
  • the impression roller is held in the pressure cut-off by the lifting cylinder acting on the pressure medium pressure, this position being determined by a deflection of the stationary synchronizing shaft, against which a radial of when the shaft rotates the synchronizing shaft strikes protruding cams, the rotationally fixed connection with the synchronizing shaft for carrying out the long stroke movement of the impression roller is hydraulically detachable.
  • the object of the invention is therefore to provide a device of the type specified at the outset, in which the impression roller moved into the print stop is blocked in its position until the initiation of the pressure adjustment movement.
  • this object is achieved in that the synchronizing shaft can be coupled to the journal bearings for its blocking by a spring-applied multi-plate brake and in that the spring-applied multi-plate brake is in its released position during the long-stroke movement and in the pressure-adjusting movement of the impression roller and at the end of the short-stroke pressure-reducing movement is operable for coupling.
  • the spring-applied multi-disk brake is expediently actuated by the pressure medium present in the system, but electrical signals can also be used to switch it.
  • the spring-applied multi-plate brake expediently consists of a multi-plate clutch, one half of which is attached to the journal bearing and the other half of which is attached to the synchronizing shaft.
  • the multi-plate clutch can be engaged by a spring loading the disk set and can be disengaged by a piston which counteracts the spring force and can be acted upon by a pressure medium.
  • the piston is expediently exposed to the pressure medium pressure of the pressure lines during the long stroke movement and the pressure setting movement of the impression cylinder.
  • the synchronizing shaft can then be freely rotated during these movements. However, if the pressure medium in the system fails, the impression roller is blocked in its respective position, so that a hard impact or an undesired constant contact of the impression roller on the forme cylinder are avoided.
  • a pressure medium-operated directional control valve which, when the directional control valve causing the short-stroke pressure shut-off movement is actuated, with a delay corresponding to the pressure shut-off stroke, blocks and relieves the pressure medium supply to the piston of the spring-applied multi-disk brake.
  • the pressure medium can be supplied to the directional control valve via a throttle with an adjustable throttle cross section.
  • An impression roller 1 is arranged between a printing roller 2 and a forme cylinder 3 of a printing press.
  • the impression roller 1 and the pressure roller 2 are supported at their ends in journal bearings 4, 5 which are arranged in guides 6 of the frame of the machine so as to be displaceable radially with respect to the forme cylinder 3.
  • the impression roller 1 has a bearing which is separate from the pressure roller 2 but is coupled to it and can be displaced per se and is pressed against the pressure roller 2 by the forme cylinder 3 during the pressure setting movement.
  • Each journal bearing 4, 5 is connected to the piston rod of pressure medium cylinders 8, 9 fixed to the frame. With the journal bearings 4, 5 also bearings 15, 16 of a synchronizing shaft 17 are connected, on the two sides of which pinions 18 are attached, which mesh with rack 19 fixed to the frame.
  • a guide roller 20 is loosely rotatably mounted on the shaft 17, over which the web 21 to be printed is guided. There is so much play between the pinions 18 and the toothed racks 19 that the impression roller 1 and the pressure roller 2 can also be slightly inclined to the forme cylinder 3 without this position being impeded by the synchronizing shaft 17. In Fig. 3 only one half of the pressure roller 2 is shown.
  • the inner part 24 of a spring-applied multi-disk brake 25 is fastened on the synchronizing shaft 17.
  • the outer part 26 of the spring-applied multi-disk brake 25 is firmly connected to the bearing 15.
  • a piston 28 is seated coaxially with the slats 27 and is pressed against the slats 27 by springs 29 and presses the slats 27 together.
  • Pressure line can be applied to the piston 28 through a line 44, so that the piston moves away from the fins 27 to the right.
  • the fins 27 are pressed together, so that a torque can be transmitted from the synchronizing shaft 17 to the bearings 15, 16, i. that is, the rotational movement of the shaft 17 and the lifting movement of the journal bearing 4 are inhibited.
  • the piston 28 is actuated by means of pressure medium, the movement of the impression roller 1 and the pressure roller 2 are released. If the weight of the rollers 1, 2 requires it, a further clutch 25 can also be arranged on the right side of the shaft 17, not shown.
  • FIGS. 4 to 7 The various switching positions of the valves in the individual operating states can be seen from the pneumatic diagrams FIGS. 4 to 7. Pressure from a pressure source 35 can be applied to the pressure medium cylinders 8, 9 via a valve 36, a line 37 and fine control valves 38, 39 as well as lines 40, 41, so that the pressure cylinders 1, 2 go into the “pressure” position. At the same time, the multi-plate clutch 25 is under pressure through line 42 and valve 43 and line 44, so that the rotational movement of the synchronizing shaft 17 is released.
  • Fig. 5 shows the "Druckab" position.
  • the lines 37, 40, 41 are depressurized.
  • the pressure medium standing over the pistons of the pressure medium cylinders 8, 9 can flow off via check valves 45, 46.
  • the lines 47 to 50 are now under pressure, so that the printing couple cylinders 1, 2 are far removed from the plate cylinder 3.
  • pressure at (Fig. 4) is set again, the pressure medium in front of the piston can flow out via the check valve 51.
  • a valve 52 If pressure from the short stroke is required, a valve 52 must be actuated. As a result, pressure medium flows via lines 53, 54 through an adjustable throttle 55 to a valve 56, which switches over with a delay in accordance with the slow inflow of pressure medium. The switchover time can be adjusted by regulating the throttle 55. In Fig. 6 the valve 56 is drawn before switching. Pressure line therefore still flows from line 47 through valve 56 via line 50 to valve 43. The position of valve 43 shown in FIG. 6 allows pressure medium to be in front of piston 28 of clutch 25, and this due to the pressure is kept open. After switching the valve 56, the line 50 is depressurized and the valve 43 goes to its other position to the left. As a result, the clutch 25 is depressurized and the springs 29 lock the synchronizing shaft 17.

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

Description

Die Erfindung betrifft eine Vorrichtung zum Druckan- und Druckabstellen und zum Ausführen einer für den Zylinderwechsel notwendigen Weithubbewegung eines auf den Formzylinder einer Tiefdruckrotationsmaschine wirkenden Presseurs, dessen beiden Zapfenlagerungen mit je einem zum Heben und Senken des Presseurs dienenden doppelt wirkenden Druckmittelzylinder verbunden und durch eine an diesen gelagerte Synchronisierwelle, die mit mit gestellfesten Zahnstangen kämmenden Ritzeln versehen ist, miteinander gekoppelt sind.The invention relates to a device for turning on and turning off the pressure and for carrying out a long-stroke movement necessary for the cylinder change of an impression cylinder acting on the forme cylinder of a rotogravure printing machine, the two pin bearings of which are connected to a double-acting pressure medium cylinder serving to raise and lower the impression cylinder and by means of a cylinder mounted synchronizing shaft, which is provided with pinions which mesh with rack-fixed racks, are coupled to one another.

Bei einer aus der DE-A-26 38 750 bekannten Vorrichtung dieser Art ist an einem der Zapfenlager ein Schleppbolzen befestigt, der mit mindestens einem dem Druckabstellhub entsprechenden Spiel in eine Nut einer im Maschinengestell parallel zu den Zapfenlagern verschieblichen Schiebeplatte eingreift. Auf der Schiebeplatte ist ein Schaltventil befestigt, dessen Stößel durch die Nockenfläche eines höchstens über das Spiel relativ zum Schaltventil beweglichen Nockens, der am Zapfenlager befestigt ist, betätigbar ist. Zur Ausführung der Weithubbewegung und der Druckanstellbewegung ist das Schaltventil überbrückt, während bei der Druckabstellbewegung den Druckmittelzylindern Druckmittel über das Schaltventil in der Weise zugeführt wird, daß dieses am Ende der kurzhubigen Druckabstellbewegung die Druckmittelzufuhr zu den Hubkammern der Druckmittelzylinder sperrt. Bei der bekannten Vorrichtung ist die Druckabstellbewegung beendet, wenn das Schaltventil den Durchfluß des Druckmittels sperrt oder wenn sich das Schaltventil auf einen Gleichgewichtszustand zwischen dem Gewicht des Presseurs, seiner Lager und der Kolben der Hubzylinder eingestellt hat. Es hat sich nun jedoch gezeigt, daß das Schaltventil den Presseur am Ende der Druckabstellbewegung nicht in einer genau definierten Stellung zu halten vermag, weil es mit dem vollen Druckmitteldruck beaufschlagt ist und es bei Druckschwankungen und infolge anderer Störeinflüsse zu einem geringfügigen unkontrollierbaren Druckmitteldurchfluß durch das Schaltventil kommen kann, so daß der Presseur in seiner Druckabstellung nicht ruhig steht, sondern in dem Maße auf- und abtanzt, in dem das Schaltventil den Durchfluß des Druckmittels wechselweise freigibt oder sperrt. Durch diese labile Druckabstellung des Presseurs kommt es zu unterschiedlichen Bahnspannungen, durch die ein einwandfreier Druck beeinträchtigt werden kann.In a device of this type known from DE-A-26 38 750, a drag pin is fastened to one of the journal bearings and engages with at least one play corresponding to the pressure shut-off stroke in a groove of a sliding plate which is displaceable in the machine frame parallel to the journal bearings. A switching valve is fastened to the sliding plate, the tappet of which can be actuated by the cam surface of a cam which is at most movable relative to the switching valve via the play and which is fastened to the journal bearing. To carry out the long-stroke movement and the pressure adjustment movement, the switching valve is bridged, while during the pressure shut-off movement, pressure medium is supplied to the pressure medium cylinders via the switching valve in such a way that this blocks the pressure medium supply to the stroke chambers of the pressure medium cylinders at the end of the short-stroke pressure stop movement. In the known device, the pressure shut-off movement is ended when the switching valve blocks the flow of the pressure medium or when the switching valve has reached an equilibrium state between the weight of the impression cylinder, its bearings and the piston of the lifting cylinder. However, it has now been shown that the switching valve is unable to hold the impression cylinder in a precisely defined position at the end of the pressure shut-off movement, because it is pressurized with the full pressure medium and, in the event of pressure fluctuations and as a result of other interferences, leads to a slight uncontrollable pressure medium flow through the switching valve can come so that the impression roller does not stand still in its pressure cut-off, but dances up and down to the extent that the switching valve alternately releases or blocks the flow of the pressure medium. This unstable pressure shutdown of the impression roller leads to different web tensions, which can impair perfect printing.

Auch bei einer weiteren ähnlichen Vorrichtung gemäß der DE-A-1 611 303 wird der Presseur in der Druckabstellung durch die Hubzylinderbeaufschlagung mit dem Druckmitteldruck gehalten, wobei hier diese Stellung durch einen Auschlag der ortsfest gelagerten Synchronisierwelle bestimmt ist, gegen den bei Wellendrehung ein radial von der Synchronisierwelle abstehender Nocken anschlägt, dessen drehfeste Verbindung mit der Synchronisierwelle zur Durchführung der Weithubbewegung des Presseurs hydraulisch lösbar ist.In another similar device according to DE-A-1 611 303, the impression roller is held in the pressure cut-off by the lifting cylinder acting on the pressure medium pressure, this position being determined by a deflection of the stationary synchronizing shaft, against which a radial of when the shaft rotates the synchronizing shaft strikes protruding cams, the rotationally fixed connection with the synchronizing shaft for carrying out the long stroke movement of the impression roller is hydraulically detachable.

Aufgabe der Erfindung ist es daher, eine Vorrichtung der eingangs angegebenen Art zu schaffen, bei der der in die Druckabstellung bewegte Presseur bis zur Einleitung der Druckanstellbewegung in seiner Stellung blockiert ist.The object of the invention is therefore to provide a device of the type specified at the outset, in which the impression roller moved into the print stop is blocked in its position until the initiation of the pressure adjustment movement.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die Synchronisierwelle zu ihrer Blockierung durch eine Federdruck-Lamellenbremse an die Zapfenlagerungen ankuppelbar ist und daß die Federdruck-Lamellenbremse sich bei der Weithubbewegung und bei der Druckanstellbewegung des Presseurs in ihrer gelösten Stellung befindet und am Ende der kurzhubigen Druckabstellbewegung zum Ankuppeln betätigbar ist. Die Federdruck-Lamellenbremse wird zweckmäßigerweise durch das im System vorhandene Druckmittel betätigt, zu ihrer Schaltung können aber auch elektrische Signale verwendet werden. Zweckmäßigerweise besteht die Federdruck-Lamellenbremse aus einer Lamellenkupplung, deren eine Hälfte an der Zapfenlagerung und deren andere Hälfte auf der Synchronisierwelle befestigt ist. Die Lamellenkupplung kann durch eine das Lamellenpaket belastende Feder einkuppelbar und durch einen der Federkraft entgegenwirkenden, mit einem Druckmittel beaufschlagbaren Kolben auskuppelbar sein. Zweckmäßigerweise ist bei der Weithubbewegung und bei der Druckanstellbewegung des Presseurs der Kolben mit dem Druckmitteldruck der Druckleitungen beausfschlagt. Bei diesen Bewegungen ist sodann die Synchronisierwelle frei drehbar. Sollte jedoch der Druckmitteldruck in dem System ausfallen, wird der Presseur in seiner jeweiligen Stellung blockiert, so daß ein hartes Aufschlagen oder eine unerwünschte ständige Auflage des Presseurs auf dem Formzylinder vermieden sind.According to the invention, this object is achieved in that the synchronizing shaft can be coupled to the journal bearings for its blocking by a spring-applied multi-plate brake and in that the spring-applied multi-plate brake is in its released position during the long-stroke movement and in the pressure-adjusting movement of the impression roller and at the end of the short-stroke pressure-reducing movement is operable for coupling. The spring-applied multi-disk brake is expediently actuated by the pressure medium present in the system, but electrical signals can also be used to switch it. The spring-applied multi-plate brake expediently consists of a multi-plate clutch, one half of which is attached to the journal bearing and the other half of which is attached to the synchronizing shaft. The multi-plate clutch can be engaged by a spring loading the disk set and can be disengaged by a piston which counteracts the spring force and can be acted upon by a pressure medium. The piston is expediently exposed to the pressure medium pressure of the pressure lines during the long stroke movement and the pressure setting movement of the impression cylinder. The synchronizing shaft can then be freely rotated during these movements. However, if the pressure medium in the system fails, the impression roller is blocked in its respective position, so that a hard impact or an undesired constant contact of the impression roller on the forme cylinder are avoided.

Nach einer bevorzugten Ausführungsform ist vorgesehen, daß ein druckmittelbetätigtes Wegeventil vorgesehen ist, das bei Betätigung des die hurzhubige Druckabstellbewegung bewirkenden Wegeventils mit einer dem Druckabstellhub entsprechenden Verzögerung die Druckmittelzufuhr zu dem Kolben der Federdruck-Lamellenbremse sperrt und diesen entlastet. Zur Verzögerung der Umschaltung kann dem Wegeventil das Druckmittel über eine Drossel mit einstellbarem Drosselquerschnitt zuführbar sein.According to a preferred embodiment it is provided that a pressure medium-operated directional control valve is provided which, when the directional control valve causing the short-stroke pressure shut-off movement is actuated, with a delay corresponding to the pressure shut-off stroke, blocks and relieves the pressure medium supply to the piston of the spring-applied multi-disk brake. To delay the changeover, the pressure medium can be supplied to the directional control valve via a throttle with an adjustable throttle cross section.

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

  • Figur 1 eine schematische Seitenansicht eines Tiefdruckwerks, dessen Presseur sich in seiner aufgrund einer Weithubbewegung angehobenen Stellung befindet,
  • Figur 2 eine der Fig. 1 entsprechende Darstellung des Tiefdruckwerks mit in der Druckanstellung befindlichem Presseur,
  • Figur 3 eine Draufsicht auf eine Seite der Zapfenlagerung und der Synchronisierwelle, teilweise im Schnitt, und
  • Figuren 4 bis 7 Druckmittelschaltpläne für die verschiedenen Bewegungen des Presseurs und der Druckwalze mit den entsprechenden Stellungen der Wegeventile und Steuerschieber.
An embodiment of the invention is explained below with reference to the drawing. In this shows
  • FIG. 1 shows a schematic side view of a gravure printing unit, the impression roller of which is in its raised position due to a long-stroke movement,
  • Figure 2 is a representation of the gravure printing unit corresponding to Fig. 1 in the Druckan positional impression roller,
  • Figure 3 is a plan view of one side of the journal bearing and the synchronizing shaft, partly in section, and
  • Figures 4 to 7 pressure fluid circuit diagrams for the various movements of the impression roller and the pressure roller with the corresponding positions of the directional control valves and spool.

Ein Presseur 1 ist zwischen einer Druckwalze 2 und einem Formzylinder 3 einer Druckmaschine angeordnet. Der Presseur 1 und die Druckwalze 2 sind an ihren Enden in Zapfenlagern 4, 5 gelagert, die in Führungen 6 des Gestells der Maschine radial zum Formzylinder 3 verschieblich angeordnet sind. Der Presseur 1 weist eine von der Druckwalze 2 getrennte, aber mit ihr gekoppelte und für sich verschiebliche Lagerung auf und wird durch den Formzylinder 3 bei der Druckanstellbewegung an die Druckwalze 2 angedrückt. Jedes Zapfenlager 4, 5 ist mit der Kolbenstange von gestellfesten Druckmittelzylindern 8, 9 verbunden. Mit den Zapfenlagern 4, 5 sind außerdem Lager 15, 16 einer Synchronisierwelle 17 verbunden, auf deren beiden Seiten Ritzel 18 befestigt sind, die mit gestellfesten Zahnstangen 19 kämmen.An impression roller 1 is arranged between a printing roller 2 and a forme cylinder 3 of a printing press. The impression roller 1 and the pressure roller 2 are supported at their ends in journal bearings 4, 5 which are arranged in guides 6 of the frame of the machine so as to be displaceable radially with respect to the forme cylinder 3. The impression roller 1 has a bearing which is separate from the pressure roller 2 but is coupled to it and can be displaced per se and is pressed against the pressure roller 2 by the forme cylinder 3 during the pressure setting movement. Each journal bearing 4, 5 is connected to the piston rod of pressure medium cylinders 8, 9 fixed to the frame. With the journal bearings 4, 5 also bearings 15, 16 of a synchronizing shaft 17 are connected, on the two sides of which pinions 18 are attached, which mesh with rack 19 fixed to the frame.

Auf der Welle 17 ist eine Leitwalze 20 lose drehbar gelagert, über die die zu bedruckende Bahn 21 geführt ist. Zwischen den Ritzeln 18 und den Zahnstangen 19 ist so viel Spiel vorgesehen, daß der Presseur 1 und die Druckwalze 2 auch leicht schief zum Formzylinder 3 stehen können, ohne daß diese Stellung durch die Synchronisierwelle 17 behindert wird. In Fig. 3 ist nur eine Hälfte der Druckwalze 2 dargestellt. Auf der Synchronisierwelle 17 ist der innere Teil 24 einer Federdruck-Lamellenbremse 25 befestigt. Der äußere Teil 26 der Federdruck-Lamellenbremse 25 ist mit dem Lager 15 fest verbunden. Koaxial zu den Lamellen 27 sitzt ein Kolben 28, der durch Federn 29 gegen die Lamellen 27 gedrückt wird und die Lamellen 27 zusammenpreßt. Durch eine Leitung 44 kann Druckmittel auf den Kolben 28 gegeben werden, so daß der Kolben sich von den Lamellen 27 weg nach rechts bewegt. Im drucklosen Zustand sind also die Lamellen 27 zusammengepreßt, so daß ein Drehmoment von der Synchronisierwelle 17 auf die Lager 15, 16 übertragen werden kann, d. h., daß die Drehbewegung der Welle 17 und die Hubbewegung des Zapfenlagers 4 gehemmt sind. Bei Betätigung des Kolbens 28 mittels Druckmittel ist die Bewegung des Presseurs 1 und die Druckwalze 2 freigegeben. Falls das Gewicht der Walzen 1, 2 es erfordert, kann auch auf der nicht dargestellten rechten Seite der Welle 17 eine weitere Kupplung 25 angeordnet sein.A guide roller 20 is loosely rotatably mounted on the shaft 17, over which the web 21 to be printed is guided. There is so much play between the pinions 18 and the toothed racks 19 that the impression roller 1 and the pressure roller 2 can also be slightly inclined to the forme cylinder 3 without this position being impeded by the synchronizing shaft 17. In Fig. 3 only one half of the pressure roller 2 is shown. The inner part 24 of a spring-applied multi-disk brake 25 is fastened on the synchronizing shaft 17. The outer part 26 of the spring-applied multi-disk brake 25 is firmly connected to the bearing 15. A piston 28 is seated coaxially with the slats 27 and is pressed against the slats 27 by springs 29 and presses the slats 27 together. Pressure line can be applied to the piston 28 through a line 44, so that the piston moves away from the fins 27 to the right. In the depressurized state, the fins 27 are pressed together, so that a torque can be transmitted from the synchronizing shaft 17 to the bearings 15, 16, i. that is, the rotational movement of the shaft 17 and the lifting movement of the journal bearing 4 are inhibited. When the piston 28 is actuated by means of pressure medium, the movement of the impression roller 1 and the pressure roller 2 are released. If the weight of the rollers 1, 2 requires it, a further clutch 25 can also be arranged on the right side of the shaft 17, not shown.

Aus den Pneumatikplänen Fig. 4 bis 7 sind die verschiedenen Schaltstellungen der Ventile in den einzelnen Betriebzuständen zu entnehmen. Von einer Druckquelle 35 kann über ein Ventil 36, eine Leitung 37 und Feinregelventile 38, 39 sowie Leitungen 40, 41 Druck auf die Druckmittelzylinder 8, 9 gegeben werden, so daß die Druckzylinder 1, 2 in « Druckan »-Stellung gehen. Gleichzeitig ist die Lamellenkupplung 25 durch die Leitung 42 und Ventil 43 sowie Leitung 44 unter Druck, so daß die Drehbewegung der Synchronisierwelle 17 freigegeben ist.The various switching positions of the valves in the individual operating states can be seen from the pneumatic diagrams FIGS. 4 to 7. Pressure from a pressure source 35 can be applied to the pressure medium cylinders 8, 9 via a valve 36, a line 37 and fine control valves 38, 39 as well as lines 40, 41, so that the pressure cylinders 1, 2 go into the “pressure” position. At the same time, the multi-plate clutch 25 is under pressure through line 42 and valve 43 and line 44, so that the rotational movement of the synchronizing shaft 17 is released.

Fig. 5 zeigt die « Druckab »-Stellung. Nach Umschalten des Ventils 36 sind die Leitungen 37, 40, 41 drucklos. Das über den Kolben der Druckmittelzylinder 8, 9 stehende Druckmittel kann über Rückschlagventile 45, 46 abfließen. Unter Druck stehen jetzt die Leitungen 47 bis 50, so daß die Druckwerkszylinder 1, 2 weit vom Formzylinder 3 abgehoben sind. Wenn wieder « Druck an (Fig. 4) eingestellt wird, kann das vor den Kolben stehende Druckmittel über das Rückschlagventil 51 abfließen.Fig. 5 shows the "Druckab" position. After switching the valve 36, the lines 37, 40, 41 are depressurized. The pressure medium standing over the pistons of the pressure medium cylinders 8, 9 can flow off via check valves 45, 46. The lines 47 to 50 are now under pressure, so that the printing couple cylinders 1, 2 are far removed from the plate cylinder 3. When pressure at (Fig. 4) is set again, the pressure medium in front of the piston can flow out via the check valve 51.

Wenn « Druck ab mit dem Kurzhub verlangt wird, muß ein Ventil 52 betätigt werden. Dadurch fließt Druckmittel über die Leitungen 53, 54 durch eine regelbare Drossel 55 zu einem Ventil 56, das entsprechend dem langsamen Zustrom an Druckmittel verzögert umschaltet. Die Umschaltzeit ist durch Regeln der Drossel 55 einstellbar. In Fig. 6 ist das Ventil 56 vor dem Umschalten gezeichnet. Von der Leitung 47 fließt also noch Druckmittel durch das Ventil 56 über die Leitung 50 zu dem Ventil 43. Die in Fig. 6 gezeigte Stellung des Ventils 43 gestattet es, daß Druckmittel vor dem Kolben 28 der Kupplung 25 steht, und diese durch den Druck offengehalten wird. Nach Umschalten des Ventils 56 wird die Leitung 50 drucklos und das Ventil 43 geht in seine andere Stellung nach links. Dadurch wird auch die Kupplung 25 drucklos und die Federn 29 sperren die Synchronisierwelle 17. Durch das Umschalten des Ventils 56 werden aber auch die Leitungen 48, 49 drucklos, so daß die Zylinder 8, 9 nach unten sinken müßten. Dies wird aber durch die Federdruck-Lamellenbremse 25 verhindert. Die Walzen 1, 2 bleiben also bei « Druck ab Kurzhub definiert in der erreichten Stellung stehen.If pressure from the short stroke is required, a valve 52 must be actuated. As a result, pressure medium flows via lines 53, 54 through an adjustable throttle 55 to a valve 56, which switches over with a delay in accordance with the slow inflow of pressure medium. The switchover time can be adjusted by regulating the throttle 55. In Fig. 6 the valve 56 is drawn before switching. Pressure line therefore still flows from line 47 through valve 56 via line 50 to valve 43. The position of valve 43 shown in FIG. 6 allows pressure medium to be in front of piston 28 of clutch 25, and this due to the pressure is kept open. After switching the valve 56, the line 50 is depressurized and the valve 43 goes to its other position to the left. As a result, the clutch 25 is depressurized and the springs 29 lock the synchronizing shaft 17. However, by switching the valve 56, the lines 48, 49 are also depressurized, so that the cylinders 8, 9 would have to sink downward. However, this is prevented by the spring-applied multi-disk brake 25. The rollers 1, 2 thus remain in the position reached at «Pressure from short stroke.

Auch wenn der Druck im Druckmittelsystem ganz ausfällt, wie in Fig. 7 dargestellt, bleiben die Walzen 1, 2 in der von ihnen erreichten Stellung stehen. Dies trifft auch zu für die Weithubstellung Fig. 5. Dadurch wird vermieden, daß bei längeren Betriebspausen der Walzenbezug des Presseurs durch die Dauerpressung auf dem Formzylinder 3 beschädigt wird.Even if the pressure in the pressure medium system fails completely, as shown in FIG. 7, the rollers 1, 2 remain in the position they have reached. This also applies to the long-stroke position shown in FIG. 5. This prevents the roller cover of the impression roller from being damaged by the long-term pressure on the forme cylinder 3 during longer breaks in operation.

Claims (7)

1. Apparatus for moving an impression cylinder acting on the form cylinder of a rotary intaglio printing machine into and out of engagement with said form cylinder and for imparting to said impression cylinder a wide-stroke movement which is required for an exchange of cylinders, wherein the two neck bearings for the impression cylinder are connected to respective double-acting fluid-operable cylinders for lifting and lowering the impression cylinder and are coupled by means of a synchronizing shaft, which is mounted in said fluid-operable cylinders and provided with pinions in mesh with racks that are secured to the frame, characterized in that the synchronizing shaft (17) is adapted to be blocked by being coupled to the neck bearings (4, 5) by means of a least one spring pressure multi-disc brake 25, which during the wide-stroke movement and during the engaging movement of the impression cylinder (1) is lifted and at the end of the short-stroke disengaging movement is adapted to be actuated for coupling.
2. Apparatus according to claim 1, characterized in that the spring-pressure multiple-disc brake (25) is operable by a pressure fluid or by electric switching signals.
3. Apparatus according to claim 1 or 2, characterized in that the spring pressure multiple-disc brake consists of a multiple disc clutch (25), one half of which is secured to the neck bearing (4, 5) whereas the other half is secured to the synchronizing shaft (17).
4. Apparatus according to any of claims 1 to 3, characterized in that the spring pressure multiple-disc clutch (25) is adapted to be engaged by a spring (29), which biases the set of discs and is adapted to be disengaged by a piston (28), which opposes the spring force and is adapted to be actuated by a pressure fluid.
5. Apparatus according to claim 4, characterized in that during the wide-stroke movement and the engaging movement of the impression cylinder (1) the fluid pressure in the pressure lines (47, 48, 49) is applied to the piston (28).
6. Apparatus according to claim 4 or 5, characterized in that a fluid-operable directional valve (56) is provided, which in response to an operation of the directional valve (52) for effecting the short-stroke disengaging movement shuts off the supply of fluid to the piston (28) of the spring pressure multiple-disc brake (25) and relieves that piston.
7. Apparatus according to claim 6, characterized to the directional valve (56) through an adjustable-area throttle valve (55) for delaying the actuation.
EP81109439A 1980-12-12 1981-10-30 Device for applying and withdrawing a pressure cylinder acting on the form cylinder in an intaglio printing press and for executing a major lifting motion of this pressure cylinder to enable the changing of the form cylinder Expired EP0054178B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3046989A DE3046989C2 (en) 1980-12-12 1980-12-12 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
DE3046989 1980-12-12

Publications (2)

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EP0054178A1 EP0054178A1 (en) 1982-06-23
EP0054178B1 true EP0054178B1 (en) 1984-08-15

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EP81109439A Expired EP0054178B1 (en) 1980-12-12 1981-10-30 Device for applying and withdrawing a pressure cylinder acting on the form cylinder in an intaglio printing press and for executing a major lifting motion of this pressure cylinder to enable the changing of the form cylinder

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US (1) US4381707A (en)
EP (1) EP0054178B1 (en)
DE (1) DE3046989C2 (en)
SU (1) SU1120921A3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3337309C2 (en) * 1983-10-13 1986-10-02 Windmöller & Hölscher, 4540 Lengerich Device for printing on and off an impression cylinder of a web-fed rotary printing machine that acts on a forme cylinder
DE3613968A1 (en) * 1986-04-24 1987-10-29 Heidelberger Druckmasch Ag DEVICE FOR GENERATING AN ADJUSTABLE FORCE ON PRINTING MACHINES
DE4426753A1 (en) 1994-07-28 1996-02-01 Bayer Ag Means for controlling plant pests
DE10152020C2 (en) 2001-03-20 2003-05-08 Koenig & Bauer Ag Device for adjusting the contact pressure of an adjustable roller
DE10113314C2 (en) 2001-03-20 2003-10-30 Koenig & Bauer Ag fixing
DE10234402B4 (en) * 2001-09-21 2015-10-08 Heidelberger Druckmaschinen Ag Independent direct drive for paper processing presses
CN100509390C (en) 2001-12-06 2009-07-08 柯尼格及包尔公开股份有限公司 Device for regulating jointing force of printer roller and controlling clutch pressure of roller

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Publication number Priority date Publication date Assignee Title
DE1099553B (en) * 1958-11-22 1961-02-16 Maschf Augsburg Nuernberg Ag Rotogravure rotary machine in series design
DE1235333B (en) * 1964-01-29 1967-03-02 Windmoeller & Hoelscher Aniline printing machine
DE1611303C3 (en) * 1968-01-29 1975-01-16 Albert-Frankenthal Ag, 6710 Frankenthal Device for turning the impression cylinder on and off in relation to the forme cylinder on rotogravure rotary presses
US3793952A (en) * 1972-07-25 1974-02-26 Windmoeller & Hoelscher Convertible printing mechanism for intaglio and flexographic printing
US3894488A (en) * 1972-10-17 1975-07-15 American Bank Note Co Printing pressure control apparatus for intaglio press
US4046070A (en) * 1974-04-22 1977-09-06 James Halley & Sons Limited Rotary printing presses
DE2610028C3 (en) * 1976-03-10 1979-09-27 Windmoeller & Hoelscher, 4540 Lengerich Printing machine convertible from gravure to flexo and vice versa
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
DE2822531A1 (en) * 1978-05-23 1979-11-29 Frankenthal Ag Albert Photogravure printing press form cylinder pressure system - has ram adjusted yoke shoes supported by screw and nut drive

Also Published As

Publication number Publication date
EP0054178A1 (en) 1982-06-23
SU1120921A3 (en) 1984-10-23
US4381707A (en) 1983-05-03
DE3046989C2 (en) 1987-11-12
DE3046989A1 (en) 1982-07-22

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