EP0132532B1 - Cylinder for a rotary printing machine - Google Patents

Cylinder for a rotary printing machine Download PDF

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Publication number
EP0132532B1
EP0132532B1 EP84105957A EP84105957A EP0132532B1 EP 0132532 B1 EP0132532 B1 EP 0132532B1 EP 84105957 A EP84105957 A EP 84105957A EP 84105957 A EP84105957 A EP 84105957A EP 0132532 B1 EP0132532 B1 EP 0132532B1
Authority
EP
European Patent Office
Prior art keywords
groove
filling piece
cylinder
rubber blanket
cylinder according
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
Application number
EP84105957A
Other languages
German (de)
French (fr)
Other versions
EP0132532A1 (en
Inventor
Hermann Fischer
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0132532A1 publication Critical patent/EP0132532A1/en
Application granted granted Critical
Publication of EP0132532B1 publication Critical patent/EP0132532B1/en
Expired legal-status Critical Current

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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
    • B41F27/1293—Devices for filling up the cylinder gap; Devices for removing the filler
    • 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 cylinder for a rotary printing press with at least one pit, in which fastening means for receiving the ends of a blanket or a printing plate and an axially extending filler for covering the pit after inserting the ends of a blanket or a printing plate are provided.
  • the object of the present invention is to develop a cylinder for a rotary printing press with at least one pit in such a way that the printing plates or blankets can be fixed by means of fewer parts, the filling piece being intended to be supported on the cylinder material itself after the printing plate or the blanket has been fastened , so that the clamping and fastening means are not burdened by contact pressures from the adjacent cylinder.
  • Figures 1 to 4 show a first embodiment of the invention.
  • the ends of a rubber blanket 3 are fastened in a pit 2 on a rubber cylinder 1 of an offset rotary printing machine for printing webs.
  • these are provided with reinforcing strips 4 and 5, which are inserted together into a slot 6 of a clamping spindle 7.
  • Fig. 1 shows the rubber blanket 3 in a tensioned state.
  • This figure shows that the pit 2 is completely covered in this state by a filler 8, i. H. is closed.
  • Fig. 2 shows the filler 8 in the retracted state, in which the insertion of the reinforcing strips 4, 5 in the slot 6 is possible in a simple manner.
  • the filler piece 8 is then raised in an advantageous manner, so that its surface 9 adapted to the circular cylindrical contour of the rubber cylinder 1 adjoins the jacket of the rubber cylinder 1 smoothly.
  • the remaining slot in the pit 2 only corresponds to twice the thickness of the rubber blanket 3.
  • the filler 8 has fingers 14 spaced from one another, which in a first axial position of the filler 8 can be moved through or between corresponding fingers 15, which are fixedly arranged in the cylinder pit 2, so that the filler 8 can be moved into the position shown in FIG. 2 shown lowered position can be brought, in which the introduction of the reinforcing strips 4, 5 of the rubber blanket 3 takes place.
  • the fingers 15 are preferably worked out in the cylinder material itself.
  • the filler piece 8 has a lifting bar 10 which is preferably continuous in the axial direction and by means of which the filler piece 8 can be lowered and raised in the pit 2 in said first axial position.
  • the lever bar 10 is arranged in a slot of a rotatable guide tube 11, not specified, so that when the guide tube 11 is rotated, the filler piece 8 rises and falls accordingly.
  • Worm drive consisting of a worm wheel 12 and a worm 13, both of which can be arranged on the end face of the rubber cylinder 11.
  • the guide tube 11 protrudes over a corresponding extension of the same somewhat over the length of the blanket cylinder 1, so that the worm wheel 12 can be placed in a corresponding manner on its end face.
  • the guide tube 11 can be mounted in the rubber cylinder 1 in the usual way.
  • the clamping spindle 7 is at least partially rotated before the filler piece 8 is raised into the position shown in FIG. 1.
  • the filler piece 8 for which the eccentric drive shown in FIG. 12, consisting of an eccentric 29 and an axle journal 28 on the filler piece 8, which can also be arranged on an end face of the rubber cylinder 1, is used.
  • the fingers 14 of the filler 8 reach above the corresponding fingers 15 fixedly arranged in the cylinder pit 2, so that they can be supported on them.
  • the filler 8 is supported in the operating state in the cylinder itself, so that no loads on the lifting and shifting devices can occur and there is also no fear of bending of the filler 8, since the fingers 15 and 14 can be arranged over the entire cylinder pit 2, so that an even support is guaranteed.
  • the guidance of the filler piece 8 on the cylinder bottom, as can be seen from FIGS. 1 and 2, in conjunction with the rest of the design of the filler piece 8 ensures that the filler piece 8 cannot tilt. 3 and 4, the axial displacement of the filler 8 is indicated by a double arrow "P.
  • FIGS. 5 to 8 show a modified embodiment, in which only one reinforcement strip 4 of the rubber blanket 3 is arranged in a tensioning spindle 18, while the reinforcement strip 5 of the other end of the rubber blanket 3 is fixed in the pit itself.
  • the reinforcing strip 5 of one end of the rubber blanket 3 can be easily inserted.
  • a retaining strip 16 with a recess 17 extending in the axial direction is provided in the cylinder pit 2 in the area of the pit bottom for fixing it. If the clamping spindle 18 is slightly rotated, the reinforcing strip 5 is introduced through the peripheral region of the clamping spindle 18, which adjoins the flattening 19. When the clamping spindle 18 is rotated, the clamping spindle 5 is pressed into the recess 17, as can be seen from FIG. 6.
  • Fig. 7 shows the extended position of the filler 8, in which the blanket 3 is stretched.
  • a magnet system 20 is arranged on the clamping spindle 18, for example, which comes to lie in a certain circumferential position with respect to the reinforcing strip 5. If the reinforcement strip 5 is made of magnetizable material, the reinforcement strip 5 is attracted by the magnet 20 in this position, leaving the recess 17. If the clamping spindle 18 is now rotated slightly counterclockwise, the end of the rubber blanket 3 provided with the reinforcing strip 5 can be easily removed in accordance with the position shown in FIG. 8. Previously, in the position of the tensioning spindle 18 shown in FIG. 6, the end of the rubber blanket provided with the reinforcing strip 4 could be pulled out of the tensioning spindle 18 in a simple manner. In contrast to the embodiment shown in FIGS. 1 to 4, the tension of the rubber blanket 3 is now carried out according to FIGS. 5 to 8 via the end of the rubber blanket inserted into the tensioning spindle 18 and provided with the reinforcement strip 4.
  • the invention is suitable both for use on blanket cylinders of offset rotary printing presses and on plate cylinders of offset rotary printing presses and also in rotogravure form cylinders for clamping a so-called “winding plate”.
  • FIGS. 9 and 10 show, with the filler piece 8 retracted, the bent end 25 and the bent end 24 of a pressure plate 22 or a winding plate can be clamped onto a forme cylinder 21 which is equipped with a pit 23.
  • the bent end 24 of the offset printing plate or a winding plate 22 can be inserted into a recess 27 of a clamping spindle 26, which is indicated in FIG. 10.
  • the filler 8 is moved out so that it assumes the outer position shown in Fig. 9, in which the pit 23 is closed, i. H. is covered.
  • the clamping spindle 26 was previously rotated accordingly.
  • the filler 8 is guided on its right side directly through the clamping spindle 26 so that it cannot slip out of the slot of the guide tube 11.
  • FIG. 11 A particularly advantageous embodiment of a rubber blanket for use in the embodiments according to FIGS. 1 to 8 is shown in FIG. 11.
  • the rubber blanket 30 consists of a rubber blanket 31 and a fabric that is designated at both ends with 32 and 33.
  • the blanket cover 31 can now be removed at both ends, so that only the textile fabric 32, 33 remains.
  • reinforcement 32 or 33 reinforcement strips 34, 35 can be attached to the textile industry.
  • the length of the blanket cover 31 is now such that, taking into account the specific stretch of the blanket 30 in the stretched state of the blanket 30 on a cylinder, the abutting edges 36, 37 abut against each other over the remaining channel opening, which is virtually a «seamless or smooth and bumpless transition is formed and the impression of a continuous blanket over the entire circumference of the cylinder is created.
  • Another advantage of such a dimensioned blanket or blanket is that only the tapered ends of the blanket 30, that is Textile fabric 32, 33 is inserted into the pit, so that the remaining gap when the filler 8 is extended can be dimensioned so small that no more bumps are caused when rolling over, which are the cause of cylinder vibrations.
  • FIG. 12 shows the rubber cylinder 1, on the right side of which an eccentric pin 28 engaging in the journal 29 of the filler 8 can be seen, through which the filler 8 is axially displaceable, as indicated by the arrow "B.
  • a hexagon 38 is used to turn the eccentric. 12 also shows the worm drive 12, 13 for rotating the guide tube 11 and the worm drive (not shown in more detail) for rotating the clamping spindle 8.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Description

Die Erfindung betrifft einen Zylinder für eine Rotationsdruckmaschine mit mindestens einer Grube, in der Befestigungsmittel zur Aufnahme der Enden eines Gummituches oder einer Druckplatte und ein sich in Achsrichtung erstreckendes Füllstück zum Abdecken der Grube nach Einführen der Enden eines Gummituches oder einer Druckplatte vorgesehen sind.The invention relates to a cylinder for a rotary printing press with at least one pit, in which fastening means for receiving the ends of a blanket or a printing plate and an axially extending filler for covering the pit after inserting the ends of a blanket or a printing plate are provided.

Aus der DE-AS-28 04 304 ist bereits eine Vorrichtung der vorgenannten Art bekannt, mit der biegsame Druckplatten auf den Formzylinder einer Rotationstiefdruckmaschine aufgespannt werden können. Das Füllstück besteht hier aus zwei Proflleiste, die durch zwei Spannvorrichtungen in der Zylindergrube fixierbar sind. Jede Profilleiste ist mit einem Ende einer Druckplatte verbunden. Dadurch wird die Spann- bzw. Befestigungsvorrichtung aufwendig und somit teuer.From DE-AS-28 04 304 a device of the aforementioned type is already known, with which flexible printing plates can be clamped onto the forme cylinder of a rotogravure printing machine. The filler consists of two profile strips, which can be fixed in the cylinder pit using two clamping devices. Each profile strip is connected to one end of a pressure plate. This makes the tensioning or fastening device complex and therefore expensive.

Aufgabe der vorliegenden Erfindung ist es, einen Zylinder für eine Rotationsdruckmaschine mit mindestens einer Grube so weiterzubilden, daß mittels weniger Teile eine Fixierung der Druckplatten oder Gummitücher möglich ist, wobei sich das Füllstück nach dem Befestigen der Druckplatte bzw. des Gummituches am Zylindermaterial selbst abstützen soll, so daß die Spann- und Befestigungsmittel nicht durch Anstelldrücke vom benachbarten Zylinder her belastet werden.The object of the present invention is to develop a cylinder for a rotary printing press with at least one pit in such a way that the printing plates or blankets can be fixed by means of fewer parts, the filling piece being intended to be supported on the cylinder material itself after the printing plate or the blanket has been fastened , so that the clamping and fastening means are not burdened by contact pressures from the adjacent cylinder.

Diese Aufgabe wird durch die Anwendung des Kennzeichens des patentanspruchs 1 gelöst. Weiterbildungen ergeben sich aus den Unteransprüchen und aus der Beschreibung in Verbindung mit den Zeichnungen. Ein wesentlicher Vorteil der erfindungsgemäßen Vorrichtung besteht darin, daß das einteilige Füllstück in der Grube zum Auflegen bzw. Aufspannen eines .Gummituches oder einer Druckplatte absenkbar ist und daß nach dem Einführen und ggf. Befestigen der Enden durch eine einfache Hebbewegung mit anschließender Axialverschiebung die Zylindergrube vollständig verschließbar ist, so daß die gefürchteten Kanaistöße, die bekanntlich Zylinderschwingungen auslösen, praktisch vermieden werden können. Dabei ist es weiterhin vorteilhaft, daß während des Aufspannvorganges das eingezogene Füllstück nicht hinderlich ist. Im folgenden wird die Erfindung anhand von Ausführungsbeispielen im einzelnen beschrieben, wobei Bezug auf die beiliegenden Zeichnungen genommen wird. In diesen zeigen :

  • Figur 1 das erfindungsgemäße Füllstück in der Grube eines Gummizylindersfür eine Offset-rotationsdruckmaschine,
  • Figur 2 das Füllstück gemäß Fig. 1 in der eingezogenen Position,
  • Figur 3 einen Schnitt durch die Zylindergrube gemäß Fig. 1,
  • Figur 4 eine Draufsicht auf die geschlossene Grube gemäß Fig. 1,
  • Figur 5 bis 8 das erfindungsgemäße Füllstück in vier Positionen mit einer abgewandelten Befestingungsvorrichtung für ein Gummituch,
  • Figur 9 und 10 das erfindungsgemäße Füllstück zum Befestigen einer Offsetdruckplatte oder einer Tiefdruckwickelplatte,
  • Figur 11 nach der erfindungsgemäßen Ausbildung eines Gummituches zum Einsetzen in den Ausführungsformen gemäß Fig. 1 bis 8 und
  • Figur 12 eine Vorrichtung an der Stirnseite eines Zylinders zum Axialverschieben des erfindungsgemäßen Füllstückes.
This object is achieved by the application of the characterizing part of patent claim 1. Further developments result from the subclaims and from the description in connection with the drawings. An important advantage of the device according to the invention is that the one-piece filler in the pit can be lowered to place or clamp a rubber blanket or a pressure plate and that after inserting and possibly fastening the ends by a simple lifting movement with subsequent axial displacement, the cylinder pit is completely can be closed, so that the dreaded canine impacts, which are known to trigger cylinder vibrations, can be practically avoided. It is also advantageous that the retracted filler is not a hindrance during the clamping process. In the following, the invention is described in detail by means of exemplary embodiments, reference being made to the accompanying drawings. In these show:
  • 1 shows the filler according to the invention in the pit of a rubber cylinder for an offset rotary printing machine,
  • FIG. 2 the filler piece according to FIG. 1 in the retracted position,
  • FIG. 3 shows a section through the cylinder pit according to FIG. 1,
  • FIG. 4 shows a top view of the closed pit according to FIG. 1,
  • 5 to 8 the filler according to the invention in four positions with a modified fastening device for a rubber blanket,
  • 9 and 10 the filler according to the invention for fastening an offset printing plate or a gravure winding plate,
  • 11 after the formation of a rubber blanket according to the invention for insertion in the embodiments according to FIGS. 1 to 8 and
  • Figure 12 shows a device on the end face of a cylinder for axially displacing the filler according to the invention.

Die Figuren 1 bis 4 zeigen eine erste Ausführungsform der Erfindung. Auf einem Gummizylinder 1 einer Offset-Rotationsdruckmaschine zum Bedrucken von Bahnen werden in einer Grube 2 die Enden eines Gummituches 3 befestigt. Zur leichteren Einführung sind diese mit Verstärkungsleisten 4 und 5 versehen, die gemeinsam in einen Schlitz 6 einer Spannspindel 7 eingeführt sind.Figures 1 to 4 show a first embodiment of the invention. The ends of a rubber blanket 3 are fastened in a pit 2 on a rubber cylinder 1 of an offset rotary printing machine for printing webs. For easier insertion, these are provided with reinforcing strips 4 and 5, which are inserted together into a slot 6 of a clamping spindle 7.

Fig. 1 zeigt das Gummituch 3 in gespannten Zustand. Diese Figur läßt erkennen, daß die Grube 2 in diesem Zustand durch ein Füllstück 8 volltständig abgedeckt, d. h. verschlossen ist. Fig. 2 zeigt das Füllstück 8 im eingezogenen Zustand, bei dem die Einführung der Verstärkungsleisten 4, 5 in den Schlitz 6 in einfacher Weise möglich ist. Nach dem Einführen und zumindeste teilweisen Spannen des Gummituches 3 durch Drehen der Spannspindel 7 wird dann das Füllstück 8 in vorteilhafter Weise angehoben, so daß sich dessen an die kreiszylindrische Kontur des Gummizylinders 1 angepaßte Oberfläche 9 an den Mantel des Gummizylinders 1 stoßfrei anschließt. In diesem Zustand (Fig. 1) entspricht der verbleibende Schlitz in der Grube 2 nur noch der doppelten Dicke des Gummituches 3.Fig. 1 shows the rubber blanket 3 in a tensioned state. This figure shows that the pit 2 is completely covered in this state by a filler 8, i. H. is closed. Fig. 2 shows the filler 8 in the retracted state, in which the insertion of the reinforcing strips 4, 5 in the slot 6 is possible in a simple manner. After insertion and at least partial tensioning of the rubber blanket 3 by rotating the tensioning spindle 7, the filler piece 8 is then raised in an advantageous manner, so that its surface 9 adapted to the circular cylindrical contour of the rubber cylinder 1 adjoins the jacket of the rubber cylinder 1 smoothly. In this state (FIG. 1), the remaining slot in the pit 2 only corresponds to twice the thickness of the rubber blanket 3.

Die vorteilhafte Ausbildung des Füllstückes 8 sowie die Ausgestaltung der Grube 2 werden besonders durch Einbeziehung der Figuren 3 und 4 ersichtlich. Demnach weist das Füllstück 8 voneinander beabstandete Finger 14 auf, die in einer ersten axialen Position des Füllstückes 8 durch bzw. zwischen korrespondierenden Fingern 15, die fest in der Zylindergrube 2 angeordnet sind, hindurchbewegbar sind, so daß das Füllstück 8 in die in Fig. 2 gezeigte abgesenkte Position gebracht werden kann, bei der die Einführung der Verstärkungsleisten 4, 5 des Gummituches 3 erfolgt. Die Finger 15 sind vorzugsweise im Zylindermaterial selbst herausgearbeitet.The advantageous design of the filler 8 and the design of the pit 2 can be seen particularly by including Figures 3 and 4. Accordingly, the filler 8 has fingers 14 spaced from one another, which in a first axial position of the filler 8 can be moved through or between corresponding fingers 15, which are fixedly arranged in the cylinder pit 2, so that the filler 8 can be moved into the position shown in FIG. 2 shown lowered position can be brought, in which the introduction of the reinforcing strips 4, 5 of the rubber blanket 3 takes place. The fingers 15 are preferably worked out in the cylinder material itself.

Außerdem weist das Füllstück 8eine vorzugsweise in Axialrichtung durchgehende Hebeleiste 10 auf, mit deren Hilfe das Füllstück 8in der Grube 2 in der genannten ersten axialen Position abgesenkt und angehoben werden kann. Für diesen Zweck ist die Hebeleiste 10 in einem nicht näher bezeichneten Schlitz eines drehbaren Führungsrohres 11 angeordnet, so daß beim Drehen des Führungsrohres 11 sich das Füllstück 8 entsprechend hebt und absenkt. Zur Drehung des Führungsrohres 11 einget sich ein Schneckentrieb, bestehend aus einem Schneckenrad 12 und einer Schnecke 13, die beide an der Stirnseite des Gummizylinders 11 angeordnet sein können. In diesem Fall ragt das Führungsrohr 11 über eine entsprechende Verlängerung desselben etwas über die Länge des Gummizylinders 1 heraus, so daß an dessen Stirnseite das Schneckenrad 12 in entsprechender Weise aufgesetzt werden kann. Das Führungsrohr 11 kann in üblicher Weise im Gummizylinder 1 gelagert sein. Nach erfolgtem Einführen der Verstärkungsleisten 4 und 5 wird die Spannspindel 7 zumindest teilweise gedreht, bevor das Füllstück 8 in die in Fig. 1 gezeigte Position angehoben wird. Anschliessend erfolgt eine Axialverschiebung des Füllstückes 8, wofür der in Fig. 12 gezeigte Exzentertrieb, bestehend aus einem Exzenter 29 und einem Achszapfen 28 am Füllstück 8, die ebenfalls an einer Stirnseite des Gummizylinders 1 angeordnet sein können, verwendet wird. Dadurch gelangen die Fingen 14 des Füllstückes 8 oberhalb der in der Zylindergrube 2 fest angeordneten, korrespondierenden Finger 15, so daß sie sich auf diesen abstützen können. Das Füllstück 8 wird im Betriebszustand im Zylinder selbst abgestützt, so daß keinerlei Belastungen der Hebe- und Verschiebeeinrichtungen auftreten können und außerdem ist eine Verbiegung des Füllstückes 8 nicht zu befürchten, da über die gesamte Zylindergrube 2 die Finger 15 und 14 angeordnet sein können, so daß eine gleichmäßige Abstützung gewährleistet ist. Durch die aus den Figuren 1 und 2 ersichtliche Führung des Füllstückes 8 am Zylinderboden in Verbindung mit der übrigen Ausgestaltung des Füllstückes 8 ist sichergestellt, daß das füllstück 8 auch nicht verkanten kann. In Fig. 3 und 4 ist die Axialverschiebung des Füllstückes 8 durch einen Doppelpfeil « P angedeutet.In addition, the filler piece 8 has a lifting bar 10 which is preferably continuous in the axial direction and by means of which the filler piece 8 can be lowered and raised in the pit 2 in said first axial position. For this purpose, the lever bar 10 is arranged in a slot of a rotatable guide tube 11, not specified, so that when the guide tube 11 is rotated, the filler piece 8 rises and falls accordingly. For the rotation of the guide tube 11 there is one Worm drive, consisting of a worm wheel 12 and a worm 13, both of which can be arranged on the end face of the rubber cylinder 11. In this case, the guide tube 11 protrudes over a corresponding extension of the same somewhat over the length of the blanket cylinder 1, so that the worm wheel 12 can be placed in a corresponding manner on its end face. The guide tube 11 can be mounted in the rubber cylinder 1 in the usual way. After the reinforcement strips 4 and 5 have been inserted, the clamping spindle 7 is at least partially rotated before the filler piece 8 is raised into the position shown in FIG. 1. This is followed by an axial displacement of the filler piece 8, for which the eccentric drive shown in FIG. 12, consisting of an eccentric 29 and an axle journal 28 on the filler piece 8, which can also be arranged on an end face of the rubber cylinder 1, is used. As a result, the fingers 14 of the filler 8 reach above the corresponding fingers 15 fixedly arranged in the cylinder pit 2, so that they can be supported on them. The filler 8 is supported in the operating state in the cylinder itself, so that no loads on the lifting and shifting devices can occur and there is also no fear of bending of the filler 8, since the fingers 15 and 14 can be arranged over the entire cylinder pit 2, so that an even support is guaranteed. The guidance of the filler piece 8 on the cylinder bottom, as can be seen from FIGS. 1 and 2, in conjunction with the rest of the design of the filler piece 8 ensures that the filler piece 8 cannot tilt. 3 and 4, the axial displacement of the filler 8 is indicated by a double arrow "P.

Die Figuren 5 bis 8 zeigen eine abgewandelte Ausführungsform, bei der lediglich eine Verstärkungsleiste 4 des Gummituches 3 in einer Spannspindel 18 angeordnet ist, während die Verstärkungsleiste 5 des anderen Endes des Gummituches 3 in der Grube selbst fixiert ist. Bei der in Fig. 5 gezeigten Stellung des Füllstückes 8 kann die Verstärkungsleiste 5 eines Endes des Gummituches 3 leicht eingeführt werden. Für deren Fixierung ist in der Zylindergrube 2 im Bereich des Grubenbodens eine Halteleiste 16 mit einer sich in Achsrichtung erstreckenden Ausnehmung 17 vorgesehen. Bei einem geringfügigen Verdrehen der Spannspindel 18 erfolgt die Einbringung der Verstärkungsleiste 5 durch den Umfangsbereich der Spannspindel 18, der sich an die Abplattung 19 anschließt. Beim Drehen der Spannspindel 18 wird die Spannspindel 5 in die Ausnehmung 17 hineingedrückt, wie aus Fig. 6 hervorgeht. Fig. 7 zeigt die herausgefahrene Stellung des Füllstückes 8, bei dem das Gummituch 3 gespannt ist.FIGS. 5 to 8 show a modified embodiment, in which only one reinforcement strip 4 of the rubber blanket 3 is arranged in a tensioning spindle 18, while the reinforcement strip 5 of the other end of the rubber blanket 3 is fixed in the pit itself. In the position of the filler piece 8 shown in FIG. 5, the reinforcing strip 5 of one end of the rubber blanket 3 can be easily inserted. A retaining strip 16 with a recess 17 extending in the axial direction is provided in the cylinder pit 2 in the area of the pit bottom for fixing it. If the clamping spindle 18 is slightly rotated, the reinforcing strip 5 is introduced through the peripheral region of the clamping spindle 18, which adjoins the flattening 19. When the clamping spindle 18 is rotated, the clamping spindle 5 is pressed into the recess 17, as can be seen from FIG. 6. Fig. 7 shows the extended position of the filler 8, in which the blanket 3 is stretched.

Wie Fig. 8 erkennen läßt, ist an der Spannspindel 18 beispielsweise ein Magnetsystem 20 angeordnet, das in einer bestimmten Umfangsposition gegenüber der Verstärkungsleiste 5 zu liegen kommt. Wenn die Verstärkungsleiste 5 aus magnetisierbarem Material besteht, wird bei dieser Stellung die Verstärkungsleiste 5 durch den Magneten 20 angezogen, wobei sie die Ausnehmung 17 verläßt. Wird nun die Spannspindel 18 geringfügig im Gegenuhrzeigersinn verdreht, so läßt sich entsprechend der in Fig. 8 gezeigten Stellung das mit der Verstärkungsleiste 5 versehene Ende des Gummituches 3 leicht herausnehmen. Zuvor konnte bei der in Fig. 6 gezeigten Stellung der Spannspindel 18 in einfacher Weise das mit der Verstärkungsleiste 4 versehene Ende des Gummituches aus der Spannspindel 18 herausgezogen werden. Im Gegensatz zu der in den Fig. 1 bis 4 gezeigten Ausführungsform erfolgt gemäß Fig. 5 bis 8 die Spannung des Gummituches 3 nun über das in die Spannspindel 18 eingeführte, mit der Verstärkungsleiste 4 versehene Ende des Gummituches.As can be seen in FIG. 8, a magnet system 20 is arranged on the clamping spindle 18, for example, which comes to lie in a certain circumferential position with respect to the reinforcing strip 5. If the reinforcement strip 5 is made of magnetizable material, the reinforcement strip 5 is attracted by the magnet 20 in this position, leaving the recess 17. If the clamping spindle 18 is now rotated slightly counterclockwise, the end of the rubber blanket 3 provided with the reinforcing strip 5 can be easily removed in accordance with the position shown in FIG. 8. Previously, in the position of the tensioning spindle 18 shown in FIG. 6, the end of the rubber blanket provided with the reinforcing strip 4 could be pulled out of the tensioning spindle 18 in a simple manner. In contrast to the embodiment shown in FIGS. 1 to 4, the tension of the rubber blanket 3 is now carried out according to FIGS. 5 to 8 via the end of the rubber blanket inserted into the tensioning spindle 18 and provided with the reinforcement strip 4.

Die Erfindung eignet sich sowohl für den Einsatz an Gummizylindern von Offsetrotationsdruckmaschinen, als auch an Plattenzylindern von Offsetrotationsdruckmaschinen und auch in Tiefdruckformzylindern zum Aufspannen einer sogenannten « Wickelplatte ». Wie die Figuren 9 und 10 zeigen, können bei eingefahrenem Füllstück 8 das abgekantete Ende 25 und das umgebogene Ende 24 einer Druckplatte 22 oder einer Wickelplatte auf einen Formzylinder 21 aufgespannt werden, der mit einer Grube 23 ausgestattet ist.The invention is suitable both for use on blanket cylinders of offset rotary printing presses and on plate cylinders of offset rotary printing presses and also in rotogravure form cylinders for clamping a so-called “winding plate”. As FIGS. 9 and 10 show, with the filler piece 8 retracted, the bent end 25 and the bent end 24 of a pressure plate 22 or a winding plate can be clamped onto a forme cylinder 21 which is equipped with a pit 23.

Das umgebogene Ende 24 der Offsetdruckplatte bzw. einer Wickelplatte 22 kann in eine Ausnehmung 27 einer Spannspindel 26 eingelegt werden, was in Fig. 10 angedeutet ist. Danach wird das Füllstück 8herausgefahren, so daß es die in Fig. 9 gezeigte äußere Stellung einnimmt, bei der die Grube 23 geschlossen, d. h. abgedeckt ist. Zuvor wurde die Spannspindel 26 entsprechend gedreht. Durch Axialverschiebung des Füllstückes 8 kann in der bereits beschriebenen Weise erreicht werden, daß sich das Füllstück 8 wiederum mit seinen Fingern 14 auf den Fingern 15 der Grube 23 abstützt. Bei dieser Ausführungsform wird das Füllstück 8 an seiner rechten Seite direkt durch die Spannspindel 26 geführt, so daß es nicht aus dem Schlitz des Führungsrohres 11 heausrutschen kann.The bent end 24 of the offset printing plate or a winding plate 22 can be inserted into a recess 27 of a clamping spindle 26, which is indicated in FIG. 10. Thereafter, the filler 8 is moved out so that it assumes the outer position shown in Fig. 9, in which the pit 23 is closed, i. H. is covered. The clamping spindle 26 was previously rotated accordingly. By axially displacing the filler 8, it can be achieved in the manner already described that the filler 8 is in turn supported with its fingers 14 on the fingers 15 of the pit 23. In this embodiment, the filler 8 is guided on its right side directly through the clamping spindle 26 so that it cannot slip out of the slot of the guide tube 11.

Eine besonders vorteilhafte Ausgestaltung eines Gummituches zru Anwendung in den Ausführungsformen gemäß Fig. 1 bis 8 ist in Fig. 11 gezeigt. Das Gummituch 30 besteht aus einer Gummidecke 31 und aus einem Gewebe, das an den beiden Enden mit 32 und 33 bezeichnet ist. In vorteilhafter Weise kann nun die Gummituchdecke 31 and beiden Enden abgetragen werden, so daß lediglich das Textilgewebe 32, 33 verbleibt. Zur Verstärkung können auf dem Textilgewerbe 32 bzw. 33 Verstärkungsleisten 34, 35 befestigt werden. In vorteilhafter Weise ist nun die Länge der Gummituchdecke 31 so bemessen, daß unter Einbeziehung der spezifischen Dehnung des Gummituches 30 im aufgespannten Zustand des Gummituches 30 auf einem Zylinder die Stoßkanten 36, 37 über der verbleibenden Kanalöffnung gegeneinander stoßen, worduch quasi ein « nahtloser bzw. glatter und stoßfreier Übergang gebildet wird und der Eindruck einer durchgehenden Gummituchdecke über den gesamten Umfang des Zylinders entsteht. Ein weiterer Vorteil eines derartig dimensionierten Gummituches bzw. einer Gummituchdecke liegt darin, daß lediglich die verjüngten Enden des Gummituches 30, d. h. das Textilgewebe 32, 33 in die Grube eingeführt wird, wodurch der Restspalt bei ausgefahrenem Füllstück 8 so klein bemessen werden kann, daß beim Überrollen keinerlei Stöße mehr entstehen, die ursächlich für Zylinderschwingungen sind. Bekanntlich führen derartige Stöße bzw. Zylinderschwingungen zu unerwünschten Streifen auf den Druckprodukten. Bei einem Zylinderumfang von etwa 600 mm liegt diese kritische kanalbreite bei etwa 2 mm. Nachdem bekannte bzw. in der Offsettechnik verwendete Gummitücher eine Dicke von 1,9 mm aufweisen, wovon die Hälfte etwa auf das Textilgewebe und die Hälfte auf die Gummituchdecke entfällt, ist es möglich, unterhalb der kritischen Kanalbreite von etwa 2 mm durch entsprechende Auslegung des Füllstückes 8 zu kommen. Ein weiterer Vorteil ergibt sich dadurch, daß die Gummituchdecke leicht schräg an den Stoßkanten 36 bzw. 37 abgetragen wird, so daß die Stoßnaht geringfügig schräg über der Zylindergrube 2 zu liegen kommt bzw. verläuft.A particularly advantageous embodiment of a rubber blanket for use in the embodiments according to FIGS. 1 to 8 is shown in FIG. 11. The rubber blanket 30 consists of a rubber blanket 31 and a fabric that is designated at both ends with 32 and 33. Advantageously, the blanket cover 31 can now be removed at both ends, so that only the textile fabric 32, 33 remains. For reinforcement 32 or 33 reinforcement strips 34, 35 can be attached to the textile industry. Advantageously, the length of the blanket cover 31 is now such that, taking into account the specific stretch of the blanket 30 in the stretched state of the blanket 30 on a cylinder, the abutting edges 36, 37 abut against each other over the remaining channel opening, which is virtually a «seamless or smooth and bumpless transition is formed and the impression of a continuous blanket over the entire circumference of the cylinder is created. Another advantage of such a dimensioned blanket or blanket is that only the tapered ends of the blanket 30, that is Textile fabric 32, 33 is inserted into the pit, so that the remaining gap when the filler 8 is extended can be dimensioned so small that no more bumps are caused when rolling over, which are the cause of cylinder vibrations. As is known, such shocks or cylinder vibrations lead to undesirable stripes on the printed products. With a cylinder circumference of around 600 mm, this critical channel width is around 2 mm. After known or used in offset technology rubber blankets have a thickness of 1.9 mm, half of which is accounted for by the textile fabric and half by the blanket, it is possible to below the critical channel width of about 2 mm by appropriate design of the filler 8 to come. Another advantage results from the fact that the blanket blanket is removed slightly obliquely at the abutting edges 36 and 37, so that the butt seam comes to lie or runs slightly obliquely over the cylinder pit 2.

Wie bereits erwähnt, kann das Füllstück 8 z. B. mit Hilfe eines Exzentertriebes axial verschoben werden. Fig. 12 zeigt den Gummizylinder 1, an dessen rechter Seite ein in den Achszapfen 29 des Füllstückes 8 eingreifender Exzenterstift 28 zu sehen ist, durch den das Füllstück 8 axial verschiebbar ist, wie der Pfeil « B andeutet. Zum Drehen des Exzenters wird ein Sechskant 38 verwendet. In Fig. 12 sind auch der Schnekentrieb 12, 13 zum Drehen des Führungsrohres 11 sowie der nicht näher bezeichnete Schneckentrieb zum Drehen der Spannspindel 8 gezeigt.

Figure imgb0001
As already mentioned, the filler 8 z. B. with the help of an eccentric drive. FIG. 12 shows the rubber cylinder 1, on the right side of which an eccentric pin 28 engaging in the journal 29 of the filler 8 can be seen, through which the filler 8 is axially displaceable, as indicated by the arrow "B. A hexagon 38 is used to turn the eccentric. 12 also shows the worm drive 12, 13 for rotating the guide tube 11 and the worm drive (not shown in more detail) for rotating the clamping spindle 8.
Figure imgb0001

Claims (8)

1. Cylinder for a rotary printing machine with at least one groove, in which are provided securing eans for receiving the ends of a rubber blanket or a printing plate, and a filling piece extending in the axial direction for covering the groove after insertion of the ends of a rubber blanket or a printing plate, characterised in that the filling piece (8), which can be dropped into the groove (2), has comb-like fingers (14) which are radially movable in a first axial position of the filling piece (8) between corresponding fingers arranged in the groove (2), in that by means of an axial adjustment device (28, 29, 38) the filling piece (8) can be moved into a second axial position, in which case the fingers (14) of the filling piece (8) come to lie above the fingers (15) and are supported on these, in that there is provided on the filling piece a lifting bar (10) which engages in a rotatable guide tube (11) extending in the axial direction, by means of which, when the guide tube is rotated, the filling piece (8) can be lowered into the first axial position before insertion of the ends (4, 5) of a rubber blanket or plate into the groove (2), and after the insertion can be raised approximately radially, after which the filling piece (8) can be shifted by the axial adjustment device (28, 29, 38) so that in this second axial position the filling piece (9) covers the groove.
2. Cylinder according to claim 1, characterised in that both ends (4, 5) of the rubber blanket (2) can be tightened by means of a single tensioning spindle (7). (Fig. 1 and 2).
3. Cylinder according to claim 1, characterised in that one end (4) of a rubber blanket (3) is arranged in a tensioning spindle (18) and the other end (5) in a recess (17) provided in the groove (2) and extending in the axial direction, from which recess the end (5) can be lifted out by a drawing device (20) arranged on the spindle (18) (Fig. 5-8).
4. Cylinder according to claim 3, characterised in that the drawing device (20) is a magnet system.
5. Cylinder according to one of the preceding claims, characterised in that the guide tube (11) can be rotated by a front worm drive (11, 12), and in that the filling piece (8) can be axially displaced by a front eccentric drive (28, 29, 38). (Fig. 1 and 2).
6. Cylinder according to claim 4, characterised in that the tensioning spindle (18) has a flattening (19) which in a specific position allows the introduction of the one end (5) of the rubber blanket (3) into the recess (17). (Fig. 5-8).
7. Cylinder according to one of the preceding claims, characterised in that the rubber blanket (2) is reduced in thickness at its ends so that after its tensioning onto the blanket cylinder (1) in the stretched state the offset points (36, 37) above the groove (2) meet, and merely the tapered sections (32, 33) are drawn into the groove (2). (Fig. 11).
8. Cylinder according to claim 7, characterised in that the tapered sections (32, 33) are slightly slanting so that the abutment point formed slopes slightly over the groove (2).
EP84105957A 1983-07-21 1984-05-25 Cylinder for a rotary printing machine Expired EP0132532B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3326215 1983-07-21
DE3326215A DE3326215C2 (en) 1983-07-21 1983-07-21 Device for clamping a printing plate or a rubber blanket

Publications (2)

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EP0132532A1 EP0132532A1 (en) 1985-02-13
EP0132532B1 true EP0132532B1 (en) 1986-09-10

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EP84105957A Expired EP0132532B1 (en) 1983-07-21 1984-05-25 Cylinder for a rotary printing machine

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US (1) US4510868A (en)
EP (1) EP0132532B1 (en)
JP (1) JPS6038156A (en)
DE (2) DE3326215C2 (en)

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DE19537420C1 (en) * 1995-10-07 1997-03-13 Koenig & Bauer Albert Ag Device for fastening and tensioning printing plates with bent ends

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DE19537420C1 (en) * 1995-10-07 1997-03-13 Koenig & Bauer Albert Ag Device for fastening and tensioning printing plates with bent ends

Also Published As

Publication number Publication date
DE3460685D1 (en) 1986-10-16
JPH0430910B2 (en) 1992-05-25
EP0132532A1 (en) 1985-02-13
DE3326215C2 (en) 1986-04-03
US4510868A (en) 1985-04-16
DE3326215A1 (en) 1985-02-07
JPS6038156A (en) 1985-02-27

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