EP0739727B1 - Device for tensioning the back side of a printing plate on a printing cylinder of a rotary printing press - Google Patents

Device for tensioning the back side of a printing plate on a printing cylinder of a rotary printing press Download PDF

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Publication number
EP0739727B1
EP0739727B1 EP96104601A EP96104601A EP0739727B1 EP 0739727 B1 EP0739727 B1 EP 0739727B1 EP 96104601 A EP96104601 A EP 96104601A EP 96104601 A EP96104601 A EP 96104601A EP 0739727 B1 EP0739727 B1 EP 0739727B1
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EP
European Patent Office
Prior art keywords
support bearing
cylinder
printing
plate
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
EP96104601A
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German (de)
French (fr)
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EP0739727A2 (en
EP0739727A3 (en
Inventor
Willi Becker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication date
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Publication of EP0739727A2 publication Critical patent/EP0739727A2/en
Publication of EP0739727A3 publication Critical patent/EP0739727A3/en
Application granted granted Critical
Publication of EP0739727B1 publication Critical patent/EP0739727B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/1225—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly
    • B41F27/1243—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly by pivotal or swivelling motion, e.g. by means of a rocking lever

Definitions

  • the invention relates to a device for tensioning the Trailing edge of a printing plate in the plate cylinder from Rotary printing machines with an expansion shaft, which in one extending in the longitudinal direction of the plate cylinder Channel is provided, with tensioning elements on the expansion shaft are attached, which interact with holding elements and a Allow tensioning of the pressure plate, and on both sides of the Expansion shaft adjusting means are provided, which are based on the Supported cylinder cheeks and stretching the pressure plate in Enable axial direction, with the expansion shaft in Cylinder center is rotatably supported in a support bearing and guided axially on both sides of the support bearing is.
  • a known version of this type is in the DE 42 44 279 A1 discloses, the object being achieved here is that a pressure plate in the clamped state Print image changes due to expansion of the processing print carrier is customizable.
  • the pressure plate trailing edge can be solved in the axial direction seen from a support bearing arranged in the middle be stretched on both sides.
  • a tensioning device for the To create the rear edge of a printing plate in which the Elongation of the trailing edge of the plate can also be adapted to the print carrier is that not only stretched in the rear area but are also offset laterally by a small amount.
  • This can e.g. B. occur when a press sheet only on one side is provided with a printed image so that the whole sheet not only expanding, but also on its rear edge is laterally offset.
  • the object is achieved in that the Guide of the expansion shaft in the support bearing axially adjustable is trained.
  • this solution is the printer Possibility given on the appropriate actuating means to exert a higher pulling force on one side of the expansion shaft, so that the expansion shaft in its entire length compared to the Support bearing is axially adjusted by a small amount.
  • the pressure plate is shifted somewhat axially, so that adapted to the existing print image on the printed sheet can be.
  • the Trailing edge of the printing plate according to the requirements be stretched so that an optimal adjustment of the Trailing edge of the plate can be carried out.
  • the printer can use the threaded bushing Precisely adjust the lateral offset of the rear edge of the panel and then the stretching of the pressure plate trailing edge in the usual Perform wise.
  • a further embodiment of the invention is thereby characterized in that between the support bearing and thrust bearing a plate spring is provided on each side of the support bearing which can be loaded differently using the adjusting means.
  • a plate spring is provided on each side of the support bearing which can be loaded differently using the adjusting means.
  • the Printer can thus cause an axial displacement of the expansion shaft via the adjusting means against the force of a disc spring make so that these axially in the range of travel can be postponed.
  • the shift is about a few tenths of a millimeter.
  • the plate springs move the expansion shaft back into theirs Zero position back.
  • the same effect can also be achieved in that the Support bearing designed resilient and from the adjusting means the zero position can be deflected.
  • the resilient training can through a weakened area on the support bearing itself be provided, the elasticity of the Support bearing when releasing the adjusting means in turn Zero position is brought about.
  • a Suspension through the support of the support bearing z. B. also can be brought about on disc springs.
  • a plate cylinder 1 On a plate cylinder 1 are on the two Cylinder faces 2 and 3 provided the cylinder faces each take a radial bearing 9.
  • the radial bearing 9 In the radial bearing 9 is one through a channel 4 in the longitudinal direction of the Plate cylinder 1 extending expansion shaft 5 is provided.
  • the expansion shaft 5 is centered by a support bearing 6 supported, which with retaining screws 7 on the plate cylinder 1 is attached.
  • Radial bearings 10 are in support bearing 6 provided that guide the expansion shaft 5 radially. Farther the expansion shaft 5 is supported on both sides by axial bearings 8 Support bearing 6 from.
  • the support bearing 6 is on both sides of the expansion shaft 5 individual clamping elements 15 provided by Holding bolt 17 in position on the expansion shaft 5 are set. At the ends of the expansion shaft 5 are in the area the cylinder cheeks 2 and 3 on the inside Strain relief rings 13 attached to the expansion shaft 5. On the outside of the cylinder cheeks 2 and 3 are at the ends the expansion shaft 5 each executed thread sections which is designed, for example, as an adjusting nut Actuator 11 is movable. Both actuators 11 is each assigned a scale 12. The scale 12 enables reading of the travel range. To reduce the Head friction between the outer surfaces of the cylinder cheeks 2 and 3 and the outer surfaces of the actuating elements 11 are between the cylinder carriages 2 and 3 and the actuators 11 Thrust bearing 10 is provided. Between Strain relief rings 13 and the inside of the Cylinder carriage 2 and 3 is an air gap 14 of a few provided tenths of a millimeter.
  • the clamping elements 15 are on the expansion shaft 5 by means of Retaining bolt 17 attached.
  • Each clamping element 15 is one Clamping lever 20 assigned to the pressure plate end to the Clamping elements 15 clamped. By twisting in Clockwise can be the clamping elements 15 Tighten pressure plate 18 on the cylinder surface.
  • the Tension levers 20 are mounted on bolts 19 which are in turn fastened in a lever extension 22.
  • the Tensioning the pressure plate end 16 is carried out by the Springs 24 and 25, the spring force, for example, by an adjusting screw 23 can be adapted to the requirements can.
  • the bearing of the expansion shaft 5 is over Radial bearing 9 shown in a threaded bushing 21.
  • the Threaded bushing 21 rests on the axial bearing 8 without play Clamping elements 15 on, the retaining bolts 17 with the Expansion shaft 5 are connected.
  • the threaded bushing 21 can e.g. B. via a clamping screw 26 in the support bearing 6th be set free of play so that the lateral Movement of the support shaft 5 can be carried out very precisely.
  • FIG of the expansion shaft 5 in the axial direction over the Clamping elements 15 and the axial bearing 8 on both sides of the Support bearing 6 is supported on plate springs 27.
  • the Printer is thus able to tighten more an actuating element 11 on one side of the plate cylinder 1 to load a diaphragm spring higher, so that the expansion shaft 5 is moved to this side by a small amount.
  • Expansion shaft 5 are deflected from their zero position, so that a correction of the print medium is possible in a simple manner is.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Support Of The Bearing (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Spannen der Hinterkante einer Druckplatte im Plattenzylinder von Rotationsdruckmaschinen mit einer Dehnwelle, die in einem sich in Längsrichtung des Plattenzylinders erstreckenden Kanal vorgesehen ist, wobei auf der Dehnwelle Spannelemente befestigt sind, die mit Halteelementen zusammenwirken und ein Spannen der Druckplatte ermöglichen, und beiderseits an der Dehnwelle Stellmittel vorgesehen sind, die sich an den Zylinderwangen abstützten und ein Dehnen der Druckplatte in Achsrichtung ermöglichen, wobei die Dehnwelle in Zylindermitte in einem Stützlager drehbar gelagert ist und über Axiallager beiderseits des Stützlagers axiale geführt ist.The invention relates to a device for tensioning the Trailing edge of a printing plate in the plate cylinder from Rotary printing machines with an expansion shaft, which in one extending in the longitudinal direction of the plate cylinder Channel is provided, with tensioning elements on the expansion shaft are attached, which interact with holding elements and a Allow tensioning of the pressure plate, and on both sides of the Expansion shaft adjusting means are provided, which are based on the Supported cylinder cheeks and stretching the pressure plate in Enable axial direction, with the expansion shaft in Cylinder center is rotatably supported in a support bearing and guided axially on both sides of the support bearing is.

Eine bekannte Ausführung dieser Art ist in der DE 42 44 279 A1 offenbart, wobei hier die Aufgabe gelöst ist, daß eine Druckplatte im geklemmten Zustand an Druckbildveränderungen durch Ausdehnungen des zu verarbeitenden Druckträgers anpaßbar ist. Mit der bekannten Lösung kann die Druckplattenhinterkante in Axialrichtung gesehen von einem in der Mitte angeordneten Stützlager aus nach beiden Seiten gedehnt werden. Weiterhin ist es bei der bekannten Ausführung möglich, nur die eine oder andere Seite zu dehnen, so daß bei einseitigem Farbauftrag auf den Druckträger eine angepaßte Dehnung der Plattenhinterkante vorgenommen werden kann.A known version of this type is in the DE 42 44 279 A1 discloses, the object being achieved here is that a pressure plate in the clamped state Print image changes due to expansion of the processing print carrier is customizable. With the known The pressure plate trailing edge can be solved in the axial direction seen from a support bearing arranged in the middle be stretched on both sides. Furthermore, it is with the known version possible, only one or the other side to stretch so that with one-sided paint application on the Print carrier an adjusted expansion of the trailing edge of the plate can be made.

Ausgehend von diesem Stand der Technik ist es die Aufgabe vorliegender Erfindung, eine Spannvorrichtung für die Hinterkante einer Druckplatte zu schaffen, bei der die Dehnung der Plattenhinterkante auch an Druckträger anpaßbar ist, die in ihrem hinteren Bereich nicht nur gedehnt sondern auch seitlich um einen geringen Betrag versetzt sind. Dies kann z. B. auftreten, wenn ein Druckbogen nur auf einer Seite mit einem Druckbild versehen ist, so daß sich der ganze Bogen nicht nur ausdehnt, sondern auch an seiner Hinterkante seitlich versetzt ist.Based on this state of the art, it is the task present invention, a tensioning device for the To create the rear edge of a printing plate, in which the Elongation of the trailing edge of the plate can also be adapted to the print carrier is that not only stretched in the rear area but are also offset laterally by a small amount. This can e.g. B. occur when a press sheet only on one side is provided with a printed image so that the whole sheet not only expanding, but also on its rear edge is laterally offset.

Gemäß der Erfindung wird die Aufgabe dadurch gelöst, daß die Führung der Dehnwelle im Stützlager axial verstellbar ausgebildet ist. Sobald ein Druckbogen an seiner Hinterkante seitlich versetzt ist, ist mit dieser Lösung dem Drucker die Möglichkeit gegeben, über das entsprechende Stellmittel auf einer Seite der Dehnwelle eine höhere Zugkraft auszuüben, so daß die Dehnwelle in ihrer gesamten Länge gegenüber dem Stützlager um einen geringen Betrag axial verstellt wird. Hierdurch wird die Druckplatte etwas axial verschoben, so daß sie an das auf dem Druckbogen vorhandene Druckbild angepaßt werden kann. Unabhängig hiervon kann jedoch auch die Hinterkante der Druckplatte entsprechend den Erfordernissen gedehnt werden, so daß eine optimale Anpassung der Plattenhinterkante durchgeführt werden kann.According to the invention the object is achieved in that the Guide of the expansion shaft in the support bearing axially adjustable is trained. As soon as a printed sheet on its trailing edge laterally offset, this solution is the printer Possibility given on the appropriate actuating means to exert a higher pulling force on one side of the expansion shaft, so that the expansion shaft in its entire length compared to the Support bearing is axially adjusted by a small amount. As a result, the pressure plate is shifted somewhat axially, so that adapted to the existing print image on the printed sheet can be. Regardless of this, however, the Trailing edge of the printing plate according to the requirements be stretched so that an optimal adjustment of the Trailing edge of the plate can be carried out.

In einer vorteilhaften Ausgestaltung der Erfindung ist in den Stützlagern eine Gewindebüchse vorgesehen, an der sich die Axiallager abstützen und weiterhin ist die Gewindebüchse mittels Klemmschraube im Stützlager spielfrei einstellbar. Mit dieser Lösung kann der Drucker über die Gewindebüchse den seitlichen Versatz der Plattenhinterkante genau einstellen und dann die Dehnung der Druckplattenhinterkante in gewohnter Weise durchführen.In an advantageous embodiment of the invention is in the Support bearings provided a threaded bush on which the Support the thrust bearing and continue to use the threaded bush adjustable without play using the clamping screw in the support bearing. With this solution, the printer can use the threaded bushing Precisely adjust the lateral offset of the rear edge of the panel and then the stretching of the pressure plate trailing edge in the usual Perform wise.

Eine weitere Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß zwischen Stützlager und Axiallager beiderseits des Stützlagers je eine Tellerfeder vorgesehen ist, die über Stellmittel unterschiedlich belastbar sind. Der Drucker kann somit eine axiale Verschiebung der Dehnwelle über die Stellmittel gegen die Kraft einer Tellerfeder vornehmen, so daß sich diese im Bereich des Federweges axial verschieben läßt. Bei der Verschiebung handelt es sich um wenige zehntel Millimeter. Sobald der Drucker die Stellmittel löst, bewegen die Tellerfedern die Dehnwelle wieder in ihre Null-Lage zurück.A further embodiment of the invention is thereby characterized in that between the support bearing and thrust bearing a plate spring is provided on each side of the support bearing which can be loaded differently using the adjusting means. Of the Printer can thus cause an axial displacement of the expansion shaft via the adjusting means against the force of a disc spring make so that these axially in the range of travel can be postponed. The shift is about a few tenths of a millimeter. As soon as the printer gets the actuators releases, the plate springs move the expansion shaft back into theirs Zero position back.

Der gleich Effekt kann auch dadurch erreicht werden, daß das Stützlager federnd ausgebildet und über die Stellmittel aus der Null-Stellung auslenkbar ist. Die federnde Ausbildung kann durch ein geschwächten Bereich am Stützlager selbst vorgesehen werden, wobei durch die Elastizität des Stützlagers beim Lösen der Stellmittel wiederum eine Null-Position herbeigeführt wird. Weiterhin könnte eine Federung durch die Lagerung des Stützlagers z. B. ebenfalls auf Tellerfedern herbeigeführt werden.The same effect can also be achieved in that the Support bearing designed resilient and from the adjusting means the zero position can be deflected. The resilient training can through a weakened area on the support bearing itself be provided, the elasticity of the Support bearing when releasing the adjusting means in turn Zero position is brought about. Furthermore, a Suspension through the support of the support bearing z. B. also can be brought about on disc springs.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen schematisch dargestellt.An embodiment of the invention is in the drawings shown schematically.

Es zeigt:

Fig. 1
einen Längsschnitt durch den Kanal eines Plattenzylinders mit Dehnwelle,
Fig. 2
einen Querschnitt durch den Kanal und durch ein Spannelement für die Druckplatte,
Fig. 3
einen Teillängsschnitt durch die Spannwelle mit Gewindebüchse,
Fig. 4
einen Teillängsschnitt durch die Spannwelle mit Tellerfedern.
It shows:
Fig. 1
a longitudinal section through the channel of a plate cylinder with expansion shaft,
Fig. 2
a cross section through the channel and through a clamping element for the pressure plate,
Fig. 3
a partial longitudinal section through the tension shaft with threaded bush,
Fig. 4
a partial longitudinal section through the tension shaft with disc springs.

An einem Plattenzylinder 1 sind an den beiden Zylinderstirnseiten Zylinderwangen 2 und 3 vorgesehen, die jeweils ein Radiallager 9 aufnehmen. In dem Radiallager 9 ist eine sich durch einen Kanal 4 in Längsrichtung des Plattenzylinders 1 erstreckende Dehnwelle 5 vorgesehen. Die Dehnwelle 5 wird mittig durch ein Stützlager 6 abgestützt, welches mit Halteschrauben 7 am Plattenzylinder 1 befestigt ist. Im Stützlager 6 sind Radiallager 10 vorgesehen, die die Dehnwelle 5 radial führen. Weiterhin stützt sich die Dehnwelle 5 über Axiallager 8 beiderseits am Stützlager 6 ab.On a plate cylinder 1 are on the two Cylinder faces 2 and 3 provided the cylinder faces each take a radial bearing 9. In the radial bearing 9 is one through a channel 4 in the longitudinal direction of the Plate cylinder 1 extending expansion shaft 5 is provided. The expansion shaft 5 is centered by a support bearing 6 supported, which with retaining screws 7 on the plate cylinder 1 is attached. Radial bearings 10 are in support bearing 6 provided that guide the expansion shaft 5 radially. Farther the expansion shaft 5 is supported on both sides by axial bearings 8 Support bearing 6 from.

Auf der Dehnwelle 5 sind beiderseits des Stützlagers 6 einzelne Spannelemente 15 vorgesehen, die durch Haltebolzen 17 in ihrer Position auf der Dehnwelle 5 festgelegt sind. An den Enden der Dehnwelle 5 sind im Bereich der Zylinderwangen 2 und 3 an deren Innenseite Dehnbegrenzungsringen 13 auf der Dehnwelle 5 befestigt. Auf der Außenseite der Zylinderwangen 2 und 3 sind an den Enden der Dehnwelle 5 jeweils Gewindeabschnitte ausgeführt, auf denen ein beispielsweise als Stellmutter ausgebildetes Stellelement 11 bewegbar ist. Beiden Stellelementen 11 ist jeweils eine Skalierung 12 zugeordnet. Die Skalierung 12 ermöglicht ein Ablesen des Stellwegs. Zur Herabsetzung der Kopfreibung zwischen den Außenflächen der Zylinderwangen 2 und 3 und den Außenflächen der Stellelemente 11 sind zwischen den Zylinderwagen 2 und 3 und den Stellelementen 11 Axiallager 10 vorgesehen. Zwischen den Dehnbegrenzungsringen 13 und den Innenseiten der Zylinderwagen 2 und 3 ist ein Luftspalt 14 von wenigen zehntel Millimetern vorgesehen.The support bearing 6 is on both sides of the expansion shaft 5 individual clamping elements 15 provided by Holding bolt 17 in position on the expansion shaft 5 are set. At the ends of the expansion shaft 5 are in the area the cylinder cheeks 2 and 3 on the inside Strain relief rings 13 attached to the expansion shaft 5. On the outside of the cylinder cheeks 2 and 3 are at the ends the expansion shaft 5 each executed thread sections which is designed, for example, as an adjusting nut Actuator 11 is movable. Both actuators 11 is each assigned a scale 12. The scale 12 enables reading of the travel range. To reduce the Head friction between the outer surfaces of the cylinder cheeks 2 and 3 and the outer surfaces of the actuating elements 11 are between the cylinder carriages 2 and 3 and the actuators 11 Thrust bearing 10 is provided. Between Strain relief rings 13 and the inside of the Cylinder carriage 2 and 3 is an air gap 14 of a few provided tenths of a millimeter.

Soll ein auf dem Plattenzylinder 1 im geklemmten Zustand befindliches Druckplattenende 16 an die Ausdehnung eines Druckträgers in axialer Richtung angepaßt werden, bewegt der Drucker die Stellelemente 11 jeweils in Richtung auf die Zylinderwangen 2 und 3 zu. Dadurch legen sich die Axiallager 10 an die Außenseiten der Zylinderwangen 2 und 3 an, wodurch die Dehnwelle 5 beiderseits unter Zugspannung gesetzt wird. Die am Stützlager 6 vorgesehenen Axiallager liegen spielfrei an, so daß bei einer Spannungserhöhung durch Verdrehen der Stellelemente 11 eine Verschiebung der Spannelemente 15 nach außen in Richtung der Zylinderwangen 2 und 3 erfolgt. Da sich bei einer Spannung der Dehnwelle 5, die von den einzelnen Spannelementen 15 zurückgelegten Verschiebungswege von innen nach außen fortschreitend jeweils addieren, legen die jeweils äußersten Spannelemente 15 den weitesten Weg zurück. Hierdurch erfolgt eine beiderseits linear von innen nach außen fortschreitende Dehnung der Dehnwelle 5 und somit, da die einzelnen Spannelemente 15 auf dieser festgelegt sind, eine lineare Verschiebung der einzelnen Spannelemente 15 von innen nach außen zunehmend. Durch die Verschiebung der einzelnen Spannelemente 15 kann eine Korrektur des Druckplattenendes 16 in geklemmten Zustand erfolgen. Dem Drucker ist es somit möglich, die Druckplatte an die Ausdehnung des Druckträgers in axialer Richtung anzupassen. Die Dehnbegrenzungsringe 13 verhindern hierbei eine überbeanspruchung der Dehnwelle 5.Should be on the plate cylinder 1 in the clamped state located pressure plate end 16 to the extent of a Pressure carrier are adjusted in the axial direction, the Printer the control elements 11 each in the direction of Cylinder webs 2 and 3 too. This will put them down Thrust bearing 10 on the outside of the cylinder cheeks 2 and 3 on, whereby the expansion shaft 5 on both sides under tension is set. The thrust bearing provided on the support bearing 6 are free of play, so that when there is an increase in voltage Rotation of the control elements 11 a displacement of the Clamping elements 15 outwards in the direction of the cylinder cheeks 2 and 3 is done. Since there is a tension in the expansion shaft 5, those covered by the individual tensioning elements 15 Shifting paths progressively from inside to outside add, put the outermost clamping elements 15 each farthest way back. This is done on both sides linear expansion from the inside to the outside Expansion shaft 5 and therefore because the individual clamping elements 15 these are set a linear displacement of the individual clamping elements 15 from the inside to the outside increasingly. By moving the individual clamping elements 15 can a correction of the pressure plate end 16 in the clamped state respectively. It is therefore possible for the printer to remove the printing plate to the expansion of the pressure carrier in the axial direction adapt. The expansion limiting rings 13 prevent this excessive strain on the expansion shaft 5.

Fig. 2 zeigt ein Teilquerschnitt durch den Plattenzylinder 1 mit dem Kanal 4, in dem wiederum die Dehnwelle 5 vorgesehen ist. Die Spannelemente 15 sind auf der Dehnwelle 5 mittels Haltebolzen 17 befestigt. Jedem Spannelement 15 ist ein Spannhebel 20 zugeordnet, der das Druckplattenende an den Spannelementen 15 festklemmt. Durch Verdrehen im Uhrzeigersinn läßt sich über die Spannelemente 15 die Druckplatte 18 auf der Zylindermantelfläche festspannen. Die Spannhebel 20 sind hierbei auf Bolzen 19 gelagert, die wiederum in einem Hebelfortsatz 22 befestigt sind. Das Spannen des Druckplattenendes 16 erfolgt hierbei durch die Federn 24 und 25, wobei die Federkraft beispielsweise durch eine Stellschraube 23 an die Erfordernisse angepaßt werden kann. 2 shows a partial cross section through the plate cylinder 1 with the channel 4, in which the expansion shaft 5 is provided is. The clamping elements 15 are on the expansion shaft 5 by means of Retaining bolt 17 attached. Each clamping element 15 is one Clamping lever 20 assigned to the pressure plate end to the Clamping elements 15 clamped. By twisting in Clockwise can be the clamping elements 15 Tighten pressure plate 18 on the cylinder surface. The Tension levers 20 are mounted on bolts 19 which are in turn fastened in a lever extension 22. The Tensioning the pressure plate end 16 is carried out by the Springs 24 and 25, the spring force, for example, by an adjusting screw 23 can be adapted to the requirements can.

In Fig. 3 ist die Lagerung der Dehnwelle 5 über ein Radiallager 9 in einer Gewindebüchse 21 gezeigt. Die Gewindebüchse 21 liegt über Axiallager 8 spielfrei an den Spannelementen 15 an, die über Haltebolzen 17 mit der Dehnwelle 5 verbunden sind. Durch Verdrehen der Gewindebüchse 21, In dem Gewinde des Stützlagers 6, kann die Dehnwelle 5 axial verschoben werden. Die Gewindebüchse 21 kann z. B. über eine Klemmschraube 26 in dem Stützlager 6 spielfrei eingestellt werden, so daß sich die seitliche Verschiebung der Stützwelle 5 sehr genau durchführen läßt.In Fig. 3, the bearing of the expansion shaft 5 is over Radial bearing 9 shown in a threaded bushing 21. The Threaded bushing 21 rests on the axial bearing 8 without play Clamping elements 15 on, the retaining bolts 17 with the Expansion shaft 5 are connected. By twisting the Threaded bushing 21, in the thread of the support bearing 6, the Expansion shaft 5 can be moved axially. The threaded bushing 21 can e.g. B. via a clamping screw 26 in the support bearing 6th be set free of play so that the lateral Movement of the support shaft 5 can be carried out very precisely.

In Fig. 4 ist eine Ausgestaltung der Erfindung gezeigt, bei der die Dehnwelle 5 in axialer Richtung über die Spannelemente 15 und die Axiallager 8 beiderseits des Stützlagers 6 über Tellerfedern 27 abgestützt ist. Der Drucker ist somit in der Lage, über verstärktes Anziehen eines Stellelements 11 auf einer Seite des Plattenzylinders 1 eine Tellerfeder höher zu belasten, so daß die Dehnwelle 5 nach dieser Seite um einen geringen Betrag verschoben wird. Hierdurch oder durch eine federnde Ausbildung des Stützlagers 6 kann somit über die Stellmittel 11 die Dehnwelle 5 aus ihrer Null-Stellung ausgelenkt werden, so daß eine Korrektur des Drucktägers auf einfache Weise möglich ist. An embodiment of the invention is shown in FIG of the expansion shaft 5 in the axial direction over the Clamping elements 15 and the axial bearing 8 on both sides of the Support bearing 6 is supported on plate springs 27. Of the Printer is thus able to tighten more an actuating element 11 on one side of the plate cylinder 1 to load a diaphragm spring higher, so that the expansion shaft 5 is moved to this side by a small amount. As a result or by a resilient design of the Support bearing 6 can thus via the adjusting means 11 Expansion shaft 5 are deflected from their zero position, so that a correction of the print medium is possible in a simple manner is.

BEZUGSZEICHENLISTEREFERENCE SIGN LIST

11
PlattenzylinderPlate cylinder
22nd
ZylinderwangeCylinder cheek
33rd
ZylinderwangeCylinder cheek
44th
Kanalchannel
55
DehnwelleExpansion shaft
66
StützlagerSupport bearing
77
HalteschraubeRetaining screw
88th
AxiallagerThrust bearing
99
RadiallagerRadial bearing
1010th
AxiallagerThrust bearing
1111
StellelementActuator
1212th
SkalierungScaling
1313
DehnbegrenzungsringExpansion ring
1414
Spaltgap
1515
SpannelementClamping element
1616
DruckplattenendePressure plate end
1717th
HaltebolzenRetaining bolt
1818th
Druckplatteprinting plate
1919th
Bolzenbolt
2020th
SpannhebelTension lever
2121
GewindebüchseThreaded sleeve
2222
HebelfortsatzLever extension
2323
StellschraubeSet screw
2424th
Federfeather
2525th
SpannfederTension spring
2626
KlemmschraubeClamping screw
2727
TellerfederBelleville spring

Claims (4)

  1. Device for tensioning the trailing edge of a printing plate in the plate cylinder of rotary printing machines, having an expanding shaft which is provided in a channel that extends in the longitudinal direction of the plate cylinder, tensioning elements being fastened on the expanding shaft, co-operating with holding elements and permitting the printing plate to be tensioned, and actuating means being provided on both sides of the expanding shaft, being supported on the cylinder cheeks and permitting the printing plate to be stretched in the axial direction, the expanding shaft being rotatably mounted at the centre of the cylinder in a support bearing and being axially guided via axial bearings on both sides of the support bearing, characterized in that the guide for the expanding shaft (5) in the support bearing (6) is designed to be axially adjustable.
  2. Device according to Claim 1, characterized
    in that a threaded bush (21), on which the axial bearings (8) are supported, is provided in the support bearing (6),
    and
    in that after being adjusted, the threaded bush (21) can be set without play in the support bearing (6) by means of clamping screw (26).
  3. Device according to Claim 1, characterized in that between the support bearing (6) and axial bearing (8), on each side of the support bearing (6), there is in each case provided a disc spring (27), which can be loaded differently via actuating means (11).
  4. Device according to Claim 1, characterized in that the support bearing (6) is of sprung design and can be deflected out of the zero position via the actuating means (11).
EP96104601A 1995-04-29 1996-03-22 Device for tensioning the back side of a printing plate on a printing cylinder of a rotary printing press Expired - Lifetime EP0739727B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19515845A DE19515845A1 (en) 1995-04-29 1995-04-29 Device for tensioning the rear edge of a printing plate in the plate cylinder of rotary printing machines
DE19515845 1995-04-29

Publications (3)

Publication Number Publication Date
EP0739727A2 EP0739727A2 (en) 1996-10-30
EP0739727A3 EP0739727A3 (en) 1997-03-12
EP0739727B1 true EP0739727B1 (en) 1998-12-09

Family

ID=7760722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96104601A Expired - Lifetime EP0739727B1 (en) 1995-04-29 1996-03-22 Device for tensioning the back side of a printing plate on a printing cylinder of a rotary printing press

Country Status (4)

Country Link
US (1) US5694854A (en)
EP (1) EP0739727B1 (en)
JP (1) JP3977456B2 (en)
DE (2) DE19515845A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19634947C1 (en) * 1996-08-29 1998-01-08 Roland Man Druckmasch Adjustment device for printing plates on printer plate cylinders, especially sheet-fed offset machines
DE10009667B4 (en) * 1999-03-19 2004-06-03 Heidelberger Druckmaschinen Ag Clamping device for clamping printing forms
DE10056195A1 (en) * 1999-12-13 2001-06-28 Heidelberger Druckmasch Ag Printing plate clamping device for plate cylinder in rotary printing machine, has hollow screw and cup spring arranged between actuator and torsion bar arranged in cylinder gap for holding printing plate by clamps
US20080148974A1 (en) * 2006-12-22 2008-06-26 Heidelberger Druckmaschinen Ag Printing Press with Printing Plate Manipulation Device
DE102008007376A1 (en) * 2008-02-01 2009-08-13 Manroland Ag Printing unit for a rotary printing press
CN109605912B (en) * 2019-01-21 2020-06-19 广东华盛铭兔环保科技股份有限公司 Printing shaft adjusting device with one shaft integrated and three-dimensional moving direction

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335663A (en) * 1964-08-12 1967-08-15 Miehle Goss Dexter Inc Plate lockup for reversible plate cylinder
DE2220652C3 (en) * 1972-04-27 1975-04-17 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Device for attaching printing plates to the plate cylinder of a rotary printing press
DE4241588C2 (en) * 1992-12-10 1994-11-17 Roland Man Druckmasch Page register system for printing forms
DE4244279C2 (en) * 1992-12-28 1995-05-18 Heidelberger Druckmasch Ag Printing form correction device to compensate for printing medium strains
DE4304328C2 (en) * 1993-02-13 2003-01-30 Heidelberger Druckmasch Ag Device for clamping a flexible printing plate on a plate cylinder of a rotary printing machine
DE9318599U1 (en) * 1993-12-04 1994-02-24 Heidelberger Druckmaschinen Ag, 69115 Heidelberg Device for pivoting flexible printing plates on the plate cylinder of rotary printing machines
US5383401A (en) * 1994-02-22 1995-01-24 Heidelberg Druckmaschinen Ag Actuating device for clamping arrangement for printing plates in rotary printing presses

Also Published As

Publication number Publication date
JP3977456B2 (en) 2007-09-19
EP0739727A2 (en) 1996-10-30
DE19515845A1 (en) 1996-10-31
DE59600934D1 (en) 1999-01-21
JPH08300626A (en) 1996-11-19
US5694854A (en) 1997-12-09
EP0739727A3 (en) 1997-03-12

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