EP0010122A2 - Device for tensioning the blanket on the transfer cylinder of a rotary printing machine - Google Patents

Device for tensioning the blanket on the transfer cylinder of a rotary printing machine Download PDF

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Publication number
EP0010122A2
EP0010122A2 EP79102339A EP79102339A EP0010122A2 EP 0010122 A2 EP0010122 A2 EP 0010122A2 EP 79102339 A EP79102339 A EP 79102339A EP 79102339 A EP79102339 A EP 79102339A EP 0010122 A2 EP0010122 A2 EP 0010122A2
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EP
European Patent Office
Prior art keywords
blanket
tensioning
rubber blanket
support spindle
cylinder
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.)
Granted
Application number
EP79102339A
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German (de)
French (fr)
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EP0010122B1 (en
EP0010122A3 (en
Inventor
Willi Jeschke
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Priority to AT79102339T priority Critical patent/ATE477T1/en
Publication of EP0010122A2 publication Critical patent/EP0010122A2/en
Publication of EP0010122A3 publication Critical patent/EP0010122A3/en
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Classifications

    • 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
    • B41F27/125—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 on a curvilinear path, e.g. by winding on a roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
    • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders

Definitions

  • the invention relates to a device for tensioning the blanket on the blanket cylinder of rotary printing presses, the outer surface of which has a slot running parallel to the cylinder axis, which widens inwards and accommodates two rotatable tensioning spindles for tensioning the blanket, each provided with a longitudinal groove for introducing the blanket ends are, the two ends of the blanket have reinforcements.
  • the rubber blanket ends are provided with reinforcements which protrude beyond the rubber blanket on both sides.
  • the protruding ends of the reinforcements are held on both sides by bushes after insertion into the slots of the clamping spindle. Only then can the tensioning spindles be turned to tension the blanket ends.
  • the above reinforcements have the disadvantage that they can interfere with the handling of the rubber blankets outside of the machine, that they are exposed to excessive stresses when the rubber blanket ends are tensioned, so that the armatures bend and there is also the risk that the bushings hold the Reinforcements jam, so that changing the rubber blankets is difficult.
  • Another known device for tensioning the rubber blanket does not use reinforcements on the rubber blanket ends and therefore requires tilting strips in the tensioning spindles, which are held in place by springs.
  • the known design has the further disadvantage that the rubber blanket ends can be inserted very difficult into the narrow slots between the tilt bar and tension spindle. If the ends are inserted unevenly, a different tension is generated over the length of the rubber blanket, which has a negative effect on the printed image.
  • the insertion of the blanket ends through the narrow slot in the Cylinder jacket is very time-consuming and thus hinders the quick change of a rubber blanket.
  • the object of the invention is to provide a device for tensioning the rubber blanket which, using simple means, enables a uniform and secure tensioning of both rubber blanket ends and a simple and quick change of the rubber blanket.
  • a support spindle is arranged parallel and at a short distance from the clamping spindles, which angled the part of the rubber blanket adjacent to the reinforcement during the clamping process and the reinforcement first fully presses into the longitudinal groove and then prevents it from sliding out.
  • the support spindle arranged above the tensioning spindles is uncomplicated and enables both rubber blanket ends to be inserted quickly and easily.
  • the support spindle also ensures a secure and even tensioning of the rubber blanket, because the two ends cannot slip out of the slots of the tensioning spindles due to the angling and are guided along their entire length.
  • the support spindle can z. B. have a circular cross-section, the cross-section can be designed as a triangle with rounded corners and it could also have the shape of an angle with an outwardly pointing angle tip and rounded leg ends. After the two ends of the rubber blanket are supported on the support spindle in the tensioned state, a relatively small cross section can be selected for this.
  • the support spindle has a circular cross section with a smaller diameter than the clamping spindle and is freely rotatable in bearings on both ends of the cylinder in bridges.
  • the support spindle can rotate when stretching the blanket ends and enables a simple and quick change of the blanket. It can also be made relatively thin because it is supported on both sides by the stretched blanket ends.
  • the support spindle is arranged symmetrically to the clamping spindles and has a larger diameter than the space between the clamping spindles. This achieves an optimal tension of the two blanket ends.
  • a rubber blanket 2 is stretched in a known manner, the ends 3, 4 of which are slit 5 in the jacket surface of the rubber cylinder are inserted.
  • the slot 5 widens inwards and accommodates two clamping spindles 6, 7.
  • Each tensioning spindle 6, 7 is provided with a longitudinal groove 8 into which the rubber blanket ends are inserted.
  • the ends 3, 4 of the rubber blanket 2 are provided with reinforcements 9.
  • a support spindle 10 is provided in the enlarged space between the outer surface of the blanket cylinder 1 and the two clamping spindles 6, 7 in parallel and at a short distance from both, which can rotate freely in bearings 11 on both Cylinder end faces is stored.
  • the support spindle 10 is arranged symmetrically to the clamping spindles and has a smaller diameter than these. However, the diameter is larger than the distance between the clamping spindles.
  • FIG. 2 shows the tensioned state of the rubber blanket 2, in which both clamping spindles 6 and 7 with the two ends 3, 4 of the rubber blanket 2 are rotated so far that the rubber blanket 2 is firmly clamped on the outer surface of the rubber cylinder 1.
  • the support spindle 10 can rotate when the blanket is tensioned and prevents the ends 3, 4 from slipping out.
  • the two rubber blanket ends can be easily inserted. In the tensioned state of the rubber blanket 2, the two rubber blanket ends rest against the support spindle 10 on both sides, so that the latter cannot bend.
  • the support spindle 10 is rotatably mounted with its pin 12 in the bearing 11.
  • the clamping spindles 6, 7 are also rotatably mounted with their pins 13, 14, the mounting being carried out in a bridge 18 fastened to the plate cylinder 1.
  • the clamping spindle 7 can be rotated via a worm 15 and a worm wheel 16.
  • the worm and the worm wheel are arranged on the opposite side of the cylinder, not shown.
  • FIG. 4 differs from FIGS. 1 and 2 in that instead of a support spindle 10 with a circular cross section, a support spindle 10 'with an approximately triangular cross section was chosen.
  • the support spindle 10 ' is not rotatably mounted in the bridges 18 and also enables a uniform and secure tensioning and a simple change of the rubber blanket.
  • the longitudinal section through the tensioning device according to FIG. 5 shows, instead of a support spindle 10 on the inside of the bridges 18 in the area of the rubber blanket 2, support bolts 19 which are rotatably or rigidly mounted in the bridges 18. This allows a safe and uniform tensioning of the rubber blanket 2 to be achieved, particularly in the case of narrow machines.
  • the support spindle 17 is conical with the smaller diameter on the side of the worm wheels 16, both of which are on the same side in the exemplary embodiment shown are provided.
  • an angular rotation of the tensioning spindles 6, 7 can be compensated for with a conical support spindle, so that a uniform tension is achieved over the entire width of the rubber blanket.

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  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Rotary Presses (AREA)

Abstract

Vorrichtung zum Spannen des Gummituches auf dem Gummizylinder von Rotationsdruckmaschinen, dessen Mantelfläche einen parallel zur Zylinderachse verlaufenden Schlitz aufweist, welcher sich nach innen erweitert und zwei drehbare Spannspindeln zum Spannen des Gummituches aufnimmt, die mit je einer Längsnut zum Einführen der Gummituchenden versehen sind, wobei die beiden Enden des Gummituches Armierungen aufweisen und sich an eine Stützspindel anlegen, die die an die Armierung angrenzenden Teile des Gummituches abwinkelt.Device for tensioning the blanket on the blanket cylinder of rotary printing presses, the outer surface of which has a slot running parallel to the cylinder axis, which widens inwards and accommodates two rotatable tensioning spindles for tensioning the blanket, each provided with a longitudinal groove for inserting the blanket ends, the have reinforcements on both ends of the rubber blanket and lie against a support spindle which angled the parts of the rubber blanket adjacent to the reinforcement.

Description

Die Erfindung betrifft eine Vorrichtung zum Spannen des Gummituches auf dem Gummizylinder von Rotationsdruckmaschinen, dessen Mantelfläche einen parallel zur Zylinderachse verlaufenden Schlitz aufweist, welcher sich nach innen erweitert und zwei drehbare Spannspindeln zum Spannen des Gummituches aufnimmt, die mit je einer Längsnut zum Einführen der Gummituchenden versehen sind, wobei die beiden Enden des Gummituches Armierungen aufweisen.The invention relates to a device for tensioning the blanket on the blanket cylinder of rotary printing presses, the outer surface of which has a slot running parallel to the cylinder axis, which widens inwards and accommodates two rotatable tensioning spindles for tensioning the blanket, each provided with a longitudinal groove for introducing the blanket ends are, the two ends of the blanket have reinforcements.

Bei einer bekannten Ausführung dieser Art (DE-AS 1 124 051) sind die Gummituchenden mit Armierungen versehen, die beiderseits das Gummituch überragen. Die überstehenden Enden der Armierungen werden nach Einführung in die Schlitze der Spannspindel beiderseits von Büchsen gehalten. Erst danach kann das Verdrehen der Spannspindeln zum Spannen der Gummituchenden erfolgen. Die vorstehenden Armierungen haben den Nachteil, daß sie bei der Handhabung der Gummitücher außerhalb der Maschine stören können, daß sie beim Spannen der Gummituchenden zu hohen Belastungen ausgesetzt sind, so daß sich die Armierungen verbiegen und außerdem besteht die Gefahr, daß die Büchsen zum Festhalten der Armierungen sich verklemmen, so daß das Wechseln der Gummitücher erschwert wird.In a known embodiment of this type (DE-AS 1 124 051), the rubber blanket ends are provided with reinforcements which protrude beyond the rubber blanket on both sides. The protruding ends of the reinforcements are held on both sides by bushes after insertion into the slots of the clamping spindle. Only then can the tensioning spindles be turned to tension the blanket ends. The above reinforcements have the disadvantage that they can interfere with the handling of the rubber blankets outside of the machine, that they are exposed to excessive stresses when the rubber blanket ends are tensioned, so that the armatures bend and there is also the risk that the bushings hold the Reinforcements jam, so that changing the rubber blankets is difficult.

Eine andere bekannte Vorrichtung zum Spannen des Gummituches (DE-PS 1 239 706) verwendet keine Armierungen an den Gummituchenden und benötigt dafür Kippleisten in den Spannspindeln, die über Federn festgehalten werden. Neben der Gefahr, daß die Kippleisten beim Wechseln des Gummituches aus den Spannspindeln herausgleiten und diese verklemmen, weist die bekannte Ausführung den weiteren Nachteil auf, daß die Gummituchenden nur sehr schwer in die schmalen Schlitze zwischen Kippleiste und Spannspindel gleichmäßig eingeführt werden können. Bei einem ungleichmäßigen Einführen der Enden wird über die Länge des Gummituches eine unterschiedliche Spannung erzeugt, die sich im Druckbild negativ bemerkbar macht. Außerdem ist das Einführen der Gummituchenden durch den schmalen Schlitz im Zylindermantel sehr zeitaufwendig und behindert somit das schnelle Wechseln eines Gummituches.Another known device for tensioning the rubber blanket (DE-PS 1 239 706) does not use reinforcements on the rubber blanket ends and therefore requires tilting strips in the tensioning spindles, which are held in place by springs. In addition to the risk that the tilt bars slide out of the tension spindles when changing the rubber blanket and jam them, the known design has the further disadvantage that the rubber blanket ends can be inserted very difficult into the narrow slots between the tilt bar and tension spindle. If the ends are inserted unevenly, a different tension is generated over the length of the rubber blanket, which has a negative effect on the printed image. In addition, the insertion of the blanket ends through the narrow slot in the Cylinder jacket is very time-consuming and thus hinders the quick change of a rubber blanket.

Aufgabe der Erfindung ist es, eine Vorrichtung zum Spannen des Gummituches zu schaffen, die unter Verwendung von einfachen Mitteln eine gleichmäßige und sichere Spannung beider Gummituchenden sowie ein einfaches und schnelles Wechseln des Gummituches ermöglicht.The object of the invention is to provide a device for tensioning the rubber blanket which, using simple means, enables a uniform and secure tensioning of both rubber blanket ends and a simple and quick change of the rubber blanket.

Die Aufgabe wird gemäß der Erfindung dadurch gelöst, daß im erweiterten Raum des Schlitzes zwischen der Mantelfläche des Gummizylinders und den beiden Spannspindeln parallel und mit geringem Abstand zu den Spannspindeln eine Stützspindel angeordnet ist, die beim Spannvorgang den an die Armierung angrenzenden Teil des Gummituches abwinkelt und dabei die Armierung in die Längsnut zunächst voll eindrückt und sodann am Herausgleiten hindert.The object is achieved according to the invention in that in the expanded space of the slot between the outer surface of the blanket cylinder and the two clamping spindles a support spindle is arranged parallel and at a short distance from the clamping spindles, which angled the part of the rubber blanket adjacent to the reinforcement during the clamping process and the reinforcement first fully presses into the longitudinal groove and then prevents it from sliding out.

Die über den Spannspindeln angeordnete Stützspindel ist unkompliziert und ermöglicht ein einfaches und schnelles Einführen beider Gummituchenden. Die Stützspindel gewährleistet auch eine sichere und gleichmäßige Spannung des Gummituches, denn die beiden Enden können durch das Abwinkeln nicht aus den Schlitzen der Spannspindeln herausrutschen und sind auf ihrer ganzen Länge geführt. Die Stützspindel kann hierbei z. B. einen kreisförmigen Querschnitt aufweisen, der Querschnitt kann als Dreieck mit abgerundeten Ecken ausgebildet sein und er könnte auch die Form eines Winkels aufweisen mit nach außen zeigender Winkelspitze und abgerundeten Schenkelenden. Nachdem sich die beiden Enden des Gummituches im gespannten Zustand an der Stützspindel abstützen, kann für diese ein relativ geringer Querschnitt gewählt werden.The support spindle arranged above the tensioning spindles is uncomplicated and enables both rubber blanket ends to be inserted quickly and easily. The support spindle also ensures a secure and even tensioning of the rubber blanket, because the two ends cannot slip out of the slots of the tensioning spindles due to the angling and are guided along their entire length. The support spindle can z. B. have a circular cross-section, the cross-section can be designed as a triangle with rounded corners and it could also have the shape of an angle with an outwardly pointing angle tip and rounded leg ends. After the two ends of the rubber blanket are supported on the support spindle in the tensioned state, a relatively small cross section can be selected for this.

In einer vorteilhaften Ausgestaltung weist die Stützspindel einen kreisförmigen Querschnitt auf mit geringerem Durchmesser als die Spannspindeln und ist frei drehbar in Lagerungen auf beiden Zylinderstirn- 'seiten in Brücken gelagert. Somit kann sich die Stützspindel beim Spannen der Gummituchenden drehen und ermöglicht ein einfaches und schnelles Wechseln des Gummituches. Auch kann sie relativ dünn ausgebildet sein, denn sie wird beiderseits von den gespannten Gummituchenden gestützt.In an advantageous embodiment, the support spindle has a circular cross section with a smaller diameter than the clamping spindle and is freely rotatable in bearings on both ends of the cylinder in bridges. Thus, the support spindle can rotate when stretching the blanket ends and enables a simple and quick change of the blanket. It can also be made relatively thin because it is supported on both sides by the stretched blanket ends.

In einer weiteren Ausgestaltung der Erfindung ist die Stützspindel symmetrisch zu den Spannspindeln angeordnet und weist einen grösseren Durchmesser als der Zwischenraum zwischen den Spannspindeln auf. Hiermit wird eine optimale Spannung der beiden Gummituchenden erreicht.In a further embodiment of the invention, the support spindle is arranged symmetrically to the clamping spindles and has a larger diameter than the space between the clamping spindles. This achieves an optimal tension of the two blanket ends.

Weitere Ausgestaltungen der Erfindung sind durch die Merkmale der Ansprüche 4 bis 6 gekennzeichnet.Further refinements of the invention are characterized by the features of claims 4 to 6.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen schematisch dargestellt. Es zeigt:

  • Fig. 1 einen Teilquerschnitt durch die Spannvorrichtung mit eingelegten Gummituchenden,
  • Fig. 2 einen Teilquerschnitt durch die Spannvorrichtung mit gespanntem Gummituch,
  • Fig. 3 einen Längsschnitt durch die Lagerung der Spannspindeln und der frei drehbaren Stützspindeln, .
  • Fig. 4 einen Teilquerschnitt durch die Spannvorrichtung mit einer dreieckigen Stützspindel,
  • Fig. 5 u. 6 Längsschnitte durch die Spannvorrichtung.
An embodiment of the invention is shown schematically in the drawings. It shows:
  • 1 shows a partial cross section through the tensioning device with inserted rubber blanket ends,
  • 2 shows a partial cross section through the tensioning device with a stretched rubber blanket,
  • 3 shows a longitudinal section through the mounting of the clamping spindles and the freely rotatable support spindles.
  • 4 shows a partial cross section through the clamping device with a triangular support spindle,
  • Fig. 5 u. 6 longitudinal sections through the clamping device.

Auf den Gummizylinder 1 wird in bekannter Weise ein Gummituch 2 aufgespannt, dessen Enden 3, 4 durch einen Schlitz 5 in der Mantelfläche des Gummizylinders eingeführt werden. Der Schlitz 5 erweitert sich nach innen und nimmt zwei Spannspindeln 6, 7 auf. Jede Spannspindel 6, 7 ist mit einer Längsnut 8 versehen, in die die Gummituchenden eingeführt werden. Im gezeigten Ausführungsbeispiel sind die Enden 3, 4 des Gummituches 2 mit Armierungen 9 versehen. Durch Verdrehen der Spannspindeln 6, 7 kann jedes Ende 3, 4 des Gummituches 2 für sich separat gespannt werden.On the rubber cylinder 1, a rubber blanket 2 is stretched in a known manner, the ends 3, 4 of which are slit 5 in the jacket surface of the rubber cylinder are inserted. The slot 5 widens inwards and accommodates two clamping spindles 6, 7. Each tensioning spindle 6, 7 is provided with a longitudinal groove 8 into which the rubber blanket ends are inserted. In the exemplary embodiment shown, the ends 3, 4 of the rubber blanket 2 are provided with reinforcements 9. By turning the tensioning spindles 6, 7, each end 3, 4 of the rubber blanket 2 can be tensioned separately.

Wie im gezeigten Ausführungsbeispiel (Fig. 1 und 2) ersichtlich, ist im erweiterten Raum zwischen der Mantelfläche des Gummizylinders 1 und den beiden Spannspindeln 6, 7 parallel und mit geringem Abstand zu beiden eine Stützspindel 10 vorgesehen, die frei drehbar in Lagerungen 11 auf beiden Zylinderstirnseiten gelagert ist. Die Stützspindel 10 ist symmetrisch zu den Spannspindeln angeordnet und weist einen geringeren Durchmesser als diese auf. Der Durchmesser ist jedoch grösser als der Abstand zwischen den Spannspindeln.As can be seen in the exemplary embodiment shown (FIGS. 1 and 2), a support spindle 10 is provided in the enlarged space between the outer surface of the blanket cylinder 1 and the two clamping spindles 6, 7 in parallel and at a short distance from both, which can rotate freely in bearings 11 on both Cylinder end faces is stored. The support spindle 10 is arranged symmetrically to the clamping spindles and has a smaller diameter than these. However, the diameter is larger than the distance between the clamping spindles.

In Figur 1 ist das Ende 4 des Gummituches 2 bereits in die Längsnut 8 der Spannspindel 7 eingelegt und diese ist etwas entgegen dem Uhrzeigersinn verdreht, so daß sich das überstehende Ende 4 an der Spannspindel 10 abstützt und abgewinkelt wird. Hierdurch wird die Armierung 9 in die Längsnut 8 eingedrückt und kann nicht herausgleiten. Das andere Ende 3 des Gummituches 2 ist in die Nut 8 der Spannspindel 6 eingeführt, wobei diese sich in der Ausgangsstellung zum Einführen des Gummituchendes befindet.In Figure 1, the end 4 of the rubber blanket 2 is already inserted into the longitudinal groove 8 of the clamping spindle 7 and this is rotated somewhat counterclockwise, so that the protruding end 4 is supported on the clamping spindle 10 and angled. As a result, the reinforcement 9 is pressed into the longitudinal groove 8 and cannot slide out. The other end 3 of the rubber blanket 2 is inserted into the groove 8 of the clamping spindle 6, which is in the starting position for inserting the rubber blanket end.

Das in Figur 2 gezeigte Ausführungsbeispiel gibt den gespannten Zustand des Gummituches 2 wieder, bei dem beide Spannspindeln 6 und 7 mit den beiden Enden 3, 4 des Gummituches 2 soweit verdreht sind, daß das Gummituch 2 auf der Mantelfläche des Gummizylinders 1 fest aufgespannt ist. Die Stützspindel 10 kann sich beim Spannen des Gummituches drehen und verhindert ein Herausrutschen der Enden 3, 4.The embodiment shown in Figure 2 shows the tensioned state of the rubber blanket 2, in which both clamping spindles 6 and 7 with the two ends 3, 4 of the rubber blanket 2 are rotated so far that the rubber blanket 2 is firmly clamped on the outer surface of the rubber cylinder 1. The support spindle 10 can rotate when the blanket is tensioned and prevents the ends 3, 4 from slipping out.

des Gummituches, so daß diese sicher auf ihrer ganzen Länge gespannt sind. Durch den geringen Durchmesser der Stützspindel 10 lassen sich die beiden Gummituchenden leicht einführen. Im gespannten Zustand des Gummituches 2 liegen die beiden Gummituchenden beiderseits an der Stützspindel 10 an, so daß sich diese nicht verbiegen kann.of the rubber blanket so that they are securely stretched over their entire length. Due to the small diameter of the support spindle 10, the two rubber blanket ends can be easily inserted. In the tensioned state of the rubber blanket 2, the two rubber blanket ends rest against the support spindle 10 on both sides, so that the latter cannot bend.

In Figur 3 ist dargestellt, daß die Stützspindel 10 mit ihrem Zapfen 12 in der Lagerung 11 drehbar gelagert ist. Auch die Spannspindeln 6, 7 sind mit ihren Zapfen 13, 14 drehbar gelagert, wobei die Lagerung in einer am Plattenzylinder 1 befestigten Brücke 18 erfolgt. Die Spannspindel 7 ist über eine Schnecke 15 und ein Schneckenrad 16 verdrehbar. Bei der Spannspindel 6 sind die Schnecke und das Schneckenrad auf der gegenüberliegenden nicht dargestellten Zylinderseite angeordnet.In Figure 3 it is shown that the support spindle 10 is rotatably mounted with its pin 12 in the bearing 11. The clamping spindles 6, 7 are also rotatably mounted with their pins 13, 14, the mounting being carried out in a bridge 18 fastened to the plate cylinder 1. The clamping spindle 7 can be rotated via a worm 15 and a worm wheel 16. In the clamping spindle 6, the worm and the worm wheel are arranged on the opposite side of the cylinder, not shown.

Die Ausführung gemäß Figur 4 unterscheidet sich von Figur 1 und 2 dadurch, daß anstelle einer Stützspindel 10 mit kreisförmigem Querschnitt eine Stützspindel 10' mit einem etwa dreieckigen Querschnitt gewählt wurde. Die Stützspindel 10' ist nicht drehbar in den Brücken 18 gelagert und ermöglicht ebenfalls ein gleichmäßiges und sicheres Spannen sowie ein einfaches Wechseln des Gummituches.The embodiment according to FIG. 4 differs from FIGS. 1 and 2 in that instead of a support spindle 10 with a circular cross section, a support spindle 10 'with an approximately triangular cross section was chosen. The support spindle 10 'is not rotatably mounted in the bridges 18 and also enables a uniform and secure tensioning and a simple change of the rubber blanket.

Der Längsschnitt durch die Spannvorrichtung gemäß Figur 5 zeigt anstelle einer Stützspindel 10 auf der Innenseite der Brücken 18 im Bereich des Gummituches 2 angeordnete Stützbolzen 19, die in den Brükken 18 drehbar oder starr gelagert sind. Hiermit läßt sich insbesondere bei schmalen Maschinen eine sichere und gleichmäßige Spannung des Gummituches 2 erreichen.The longitudinal section through the tensioning device according to FIG. 5 shows, instead of a support spindle 10 on the inside of the bridges 18 in the area of the rubber blanket 2, support bolts 19 which are rotatably or rigidly mounted in the bridges 18. This allows a safe and uniform tensioning of the rubber blanket 2 to be achieved, particularly in the case of narrow machines.

Gemäß Figur 6 ist die Stützspindel 17 konisch ausgebildet mit dem kleineren Durchmesser auf der Seite der Schneckenräder 16, wobei diese im gezeigten Ausführungsbeispiel beide auf der gleichen Seite vorgesehen sind. Insbesondere bei breiten Maschinen kann mit einer konischen Stützspindel eine Winkelverdrehung der Spannspindeln 6, 7 ausgeglichen werden, so daß eine gleichmäßige Spannung über die ganze Breite des Gummituches erreicht wird.According to FIG. 6, the support spindle 17 is conical with the smaller diameter on the side of the worm wheels 16, both of which are on the same side in the exemplary embodiment shown are provided. In the case of wide machines in particular, an angular rotation of the tensioning spindles 6, 7 can be compensated for with a conical support spindle, so that a uniform tension is achieved over the entire width of the rubber blanket.

TEILELISTEPARTS LIST

  • 1 Gummizylinder1 rubber cylinder
  • 2 Gummituch2 rubber blanket
  • 3 Ende3 end
  • 4 Ende4 end
  • 5 Schlitz5 slot
  • 6 Spannspindel6 clamping spindle
  • 7 Spannspindel7 clamping spindle
  • 8 Längsnut8 longitudinal groove
  • 9 Armierungen9 reinforcements
  • 10 Stützspindel10 support spindle
  • 10' Stützspindel10 'support spindle
  • 11 Lagerungen11 positions
  • 12 Zapfen12 cones
  • 13 Zapfen13 cones
  • 14 Zapfen14 cones
  • 15 Schnecke15 snail
  • 16 Schneckenrad16 worm wheel
  • 17 Stützspindel17 support spindle
  • 18 Brücke18 bridge
  • 19 Stützbolzen19 support bolts

Claims (6)

1. Vorrichtung zum Spannen des Gummituches auf dem Gummizylinder von Rotationsdruckmaschinen, dessen Mantelfläche einen parallel zur Zylinderachse verlaufenden Schlitz aufweist, welcher sich nach innen erweitert und zwei drehbare Spannspindeln zum Spannen des Gummituches aufnimmt, die mit je einer Längsnut zum Einführen der Gummituchenden versehen sind, wobei die beiden Enden des Gummituches Armierungen aufweisen, dadurch gekennzeichnet, - daß im erweiterten Raum des Schlitzes (5) zwischen der Mantelfläche des Gummizylinders (1) und den beiden Spannspindeln (6,7) parallel und mit geringem Abstand zu den Spannspindeln (6, 7) eine Stützspindel (10) angeordnet ist, - die beim Spannvorgang den an die Armierung (9) angrenzenden Teil des Gummituches (2) abwinkelt und dabei die Armierung (9) in die Längsnut (8) zunächst voll eindrückt und sodann am Herausgleiten hindert. 1.Device for tensioning the blanket on the blanket cylinder of rotary printing presses, the lateral surface of which has a slot running parallel to the cylinder axis, which widens inwards and accommodates two rotatable tensioning spindles for tensioning the blanket, which are each provided with a longitudinal groove for inserting the blanket ends, the two ends of the rubber blanket having reinforcements, characterized in that - That in the enlarged space of the slot (5) between the outer surface of the blanket cylinder (1) and the two clamping spindles (6,7) in parallel and at a short distance from the clamping spindles (6, 7) a support spindle (10) is arranged, - The part of the rubber blanket (2) adjacent to the reinforcement (9) is angled during the tensioning process and thereby fully presses the reinforcement (9) into the longitudinal groove (8) and then prevents it from sliding out. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, - daß die Stützspindel (10) einen kreisförmigen Querschnitt aufweist, - einen geringeren Durchmesser als die Spannspindeln (6,7) aufweist, - und frei drehbar in Lagerungen (11) auf beiden Zylinderstirnseiten in Brücken (18) gelagert ist. 2. Device according to claim 1, characterized in - That the support spindle (10) has a circular cross section, - has a smaller diameter than the clamping spindles (6,7), - And is freely rotatable in bearings (11) on both ends of the cylinder in bridges (18). 3. Vorrichtung nach Anspruch 1 und 2,
dadurch gekennzeichnet, - daß die Stützspindel (10) symmetrisch zu den Spannspindeln (6, 7) angeordnet ist - und einen größeren Durchmesser als der Zwischenraum zwischen den Spannspindeln (6, 7) aufweist. 3. Device according to claim 1 and 2,
characterized, - That the support spindle (10) is arranged symmetrically to the clamping spindles (6, 7) - And has a larger diameter than the space between the clamping spindles (6, 7). 4. Vorrichtung nach Anspruch 1 und. 2,
dadurch gekennzeichnet, - daß die Stützspindel (10') über die Breite des Gummituches (2) eine Dreiecks- oder Winkelform aufweist und nicht drehbar in den Brücken (18) gelagert ist. 4. Apparatus according to claim 1 and. 2,
characterized, - That the support spindle (10 ') across the width of the rubber blanket (2) has a triangular or angular shape and is not rotatably mounted in the bridges (18). 5. Vorrichtung nach Anspruch 1 und 2,
dadurch gekennzeichnet, - daß anstelle der Stützspindel (10) auf beiden Zylinderseiten im Bereich des Gummituches (2) Stützbolzen (19) angeordnet sind. 5. The device according to claim 1 and 2,
characterized, - That instead of the support spindle (10) on both cylinder sides in the region of the rubber blanket (2) support bolts (19) are arranged. 6. Vorrichtung nach Anspruch 1 und 2,
dadurch gekennzeichnet, - daß die Stützspindel (17) über die Breite des Gummituches (2) konisch ausgebildet ist mit dem kleineren Durchmesser auf der Seite der Schneckenräder (16). 6. The device according to claim 1 and 2,
characterized, - That the support spindle (17) across the width of the rubber blanket (2) is conical with the smaller diameter on the side of the worm wheels (16).
EP79102339A 1978-09-27 1979-07-09 Device for tensioning the blanket on the transfer cylinder of a rotary printing machine Expired EP0010122B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79102339T ATE477T1 (en) 1978-09-27 1979-07-09 DEVICE FOR TENSIONING THE RUBBER CLOTH ON THE RUBBER CYLINDER OF ROTARY PRINTING MACHINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2842000 1978-09-27
DE2842000A DE2842000C3 (en) 1978-09-27 1978-09-27 Device for tensioning the blanket on the blanket cylinder of rotary printing machines

Publications (3)

Publication Number Publication Date
EP0010122A2 true EP0010122A2 (en) 1980-04-30
EP0010122A3 EP0010122A3 (en) 1980-07-09
EP0010122B1 EP0010122B1 (en) 1981-12-16

Family

ID=6050573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79102339A Expired EP0010122B1 (en) 1978-09-27 1979-07-09 Device for tensioning the blanket on the transfer cylinder of a rotary printing machine

Country Status (5)

Country Link
US (1) US4261262A (en)
EP (1) EP0010122B1 (en)
JP (1) JPS5937228B2 (en)
AT (1) ATE477T1 (en)
DE (1) DE2842000C3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1086813A2 (en) * 1999-09-22 2001-03-28 Tokyo Kikai Seisakusho Ltd. Blanket-mounting mechanism of printing press, and blanket

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5858545U (en) * 1981-10-16 1983-04-20 株式会社東京機械製作所 Blanket tensioning device in printing presses
DE3338450C1 (en) * 1983-10-22 1985-06-05 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Device for inserting the end sections of a flexible elevator into a pit of a cylinder of a printing press
US4577560A (en) * 1984-08-20 1986-03-25 R. R. Donnelley & Sons Company Gapless lock-up for offset printing cylinders
US4829896A (en) * 1987-05-18 1989-05-16 W. R. Grace & Co. Apparatus for attaching a printing blanket to a printing cylinder

Citations (1)

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FR1367860A (en) * 1963-08-13 1964-07-24 Crabtree & Sons Ltd R Development of rotary printing machines

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DE7148001U (en) * 1900-01-01 Maschinenfabrik Augsburg Nuernberg Ag Device for fastening the rubber blanket or a printing plate on the rubber or plate cylinder of a rotary offset printing machine
DE388029C (en) * 1921-10-23 1924-01-08 Vogtlaendische Maschinenfabrik Clamping device for flexible printing plates on rubber printing rotary machines
US2627230A (en) * 1945-05-26 1953-02-03 Hoe & Co R Blanket tensioning means
US2727463A (en) * 1952-01-21 1955-12-20 Tingue Brown & Co Blanketing of printing press impression cylinders
US2850970A (en) * 1955-04-22 1958-09-09 Levey Fred K H Co Inc Lock-up
DE1124051B (en) * 1955-04-22 1962-02-22 Fred K H Levey Company Inc Device for attaching the blanket to the blanket cylinder
GB918673A (en) * 1960-03-08 1963-02-13 Vickers Armstrongs Ltd Improvements in or relating to blanket tensioning means for the impression cylindersof rotary printing presses
DE1239706B (en) * 1963-08-27 1967-05-03 Winkler Fallert & Co Maschf Device for tensioning the rubber blanket on the rubber cylinder
JPS4930241U (en) * 1972-06-14 1974-03-15
DE2606223A1 (en) * 1976-02-17 1977-08-18 Maschf Augsburg Nuernberg Ag DEVICE FOR TENSIONING THE RUBBER CLOTH OF AN OFFSET PRINTING MACHINE

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FR1367860A (en) * 1963-08-13 1964-07-24 Crabtree & Sons Ltd R Development of rotary printing machines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1086813A2 (en) * 1999-09-22 2001-03-28 Tokyo Kikai Seisakusho Ltd. Blanket-mounting mechanism of printing press, and blanket
EP1086813A3 (en) * 1999-09-22 2001-08-16 Tokyo Kikai Seisakusho Ltd. Blanket-mounting mechanism of printing press, and blanket
EP1607219A1 (en) * 1999-09-22 2005-12-21 Tokyo Kikai Seisakusho Ltd. Blanket for printing press

Also Published As

Publication number Publication date
US4261262A (en) 1981-04-14
DE2842000C3 (en) 1984-08-30
DE2842000B2 (en) 1981-01-15
ATE477T1 (en) 1982-01-15
DE2842000A1 (en) 1980-04-10
EP0010122B1 (en) 1981-12-16
JPS5937228B2 (en) 1984-09-08
JPS5546978A (en) 1980-04-02
EP0010122A3 (en) 1980-07-09

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