EP0529446A1 - Device for fixing and tensioning a blanket on a cylinder of a printing machine - Google Patents

Device for fixing and tensioning a blanket on a cylinder of a printing machine Download PDF

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Publication number
EP0529446A1
EP0529446A1 EP92113947A EP92113947A EP0529446A1 EP 0529446 A1 EP0529446 A1 EP 0529446A1 EP 92113947 A EP92113947 A EP 92113947A EP 92113947 A EP92113947 A EP 92113947A EP 0529446 A1 EP0529446 A1 EP 0529446A1
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EP
European Patent Office
Prior art keywords
tensioning
blanket
cylinder
rubber blanket
shaft
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
EP92113947A
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German (de)
French (fr)
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EP0529446B1 (en
Inventor
Willi Richard Ludwig Dörsam
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer Albert AG
Koenig and Bauer AG
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Publication date
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Publication of EP0529446A1 publication Critical patent/EP0529446A1/en
Application granted granted Critical
Publication of EP0529446B1 publication Critical patent/EP0529446B1/en
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    • 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 fastening and tensioning a printing blanket on a cylinder of a printing press according to the preamble of claim 1.
  • a blanket tensioning device in which threaded bolts are arranged in the cylinder pit, which are connected via lever arms to the tensioning strips for the blanket. When the threaded bolts are actuated, the tensioning strips are pivoted and thus cause the tension of the rubber blanket. Tensioning the rubber blanket is, however, very limited with regard to the tensioning path, since the swivel angle of the lever arms is limited.
  • a blanket tensioning device in which a locking element is arranged in the tensioning shaft is automatically pressed into a locking position by a closing curve.
  • the tensioning shafts of this device are actuated via worm segments and a worm as well as via bevel gear by means of tensioning screws, which results in a high power requirement due to the high frictional resistance of the worm.
  • the tensioning path of the tensioning shafts is limited because the locking elements change in their radii. Thus, a longer rubber blanket end cannot be clamped, which later has to be put around due to signs of wear at the start of printing.
  • the invention has for its object to provide a device for attaching and tensioning a blanket on a cylinder of a printing press, which makes it possible to hold the blanket while pulling and then tension a long blanket end with little effort.
  • the arrangement of a lock which is actuated by the same controls with which the rubber blanket is stretched, allows easy handling of holding the beginning of the blanket when attaching the blanket to the cylinder.
  • a toothed gear smooth movement is achieved in the case of blanket tensioning in conjunction with a toothed rack, so that only a small amount of force is required to achieve the To actuate clamping shafts.
  • a long tensioning path of the tensioning shafts by the angle ⁇ it is possible to accommodate a long spare piece of a rubber blanket end so that this can be added in the event of wear or other damage at the beginning of the blanket.
  • Fig. 1 shows a cross section through the inventive device in the cylinder channel in the rest position according to the line A - B of FIG. 3, but with a rubber blanket inserted at the start of printing.
  • a tensioning shaft 3 extending in the axial direction is arranged in a known manner and has teeth 4 on its circumference.
  • a bearing block 7 is fastened by means of screws 5, which supports a shaft 8, which is connected in a rotationally fixed manner to an intermediate gear 11 via a feather key 9.
  • the shaft 8 is by means of locking rings 12; 13 performed on the bearing block 7.
  • a cam disk 16 is connected in a rotationally fixed manner to the shaft 8 via a fastening screw 14.
  • a bore 18 in the recess 6 of the cylinder pit 1 there is a bore 18 in the recess 6 of the cylinder pit 1 with an additional bore 19 for receiving a clamping screw 21.
  • the clamping screw 21 is supported on the one hand near the cylinder circumference on a holding plate 22 which has a hole 23 for actuating the clamping screw 21 and which is fastened in the cylinder pit 1 by means of stud bolts, not shown.
  • the clamping screw 21 is supported in the additional bore 19 on a thrust bearing 24 with an intermediate washer 26 via a pin 25.
  • the clamping screw 21 is surrounded over half its length with a toothed rack 27 which has a threaded hole which is operatively connected to the thread of the clamping screw 21.
  • the rack 27 is also held by the bearing block 7.
  • the tensioning shaft 3 has a cutout 28 running in the axial direction, which receives a hook strip 29 for hanging the rubber blanket end 31 with the reinforcement plate 32 and the arm 33 of a hook-shaped locking device.
  • the locking device consists of the arm 33 with a hook 34 which extends at a right angle at one end.
  • the other side of the arm 33 has a bearing piece 36 which is approximately circular in cross section, whereby supports the bearing piece 36 in a further recess 37 which is located in the radial direction of the tensioning shaft 3 for the milling 28.
  • the bearing piece 36 has two fork-like guides 38 running at right angles, in the same direction as the hook 34, to which both ends of a pin 39 are guided.
  • the pin 39 is arranged transversely to the longitudinal axis through the upper end of a plunger 41.
  • the tappet 41 is operatively connected at its lower end to the cam disk 16 and can be actuated against the force of a compression spring 42 surrounding the tappet 41.
  • the compression spring 42 is delimited on the one hand by a radial blind hole in the tensioning shaft 3 and on the other hand by a disk 43 locked on the tappet 41. However, this radial blind hole is continued by an elongated bore with a reduced diameter for receiving the plunger 41.
  • the device for fastening and tensioning a printing blanket on a cylinder of a printing press consists of an approximately on the left side of the center line 17 of the above-described device, with the aid of which the rubber blanket 31 in the tensioning shaft 3 during laying around the Blanket cylinder 2 is held and can be tensioned.
  • the device for tensioning the other blanket end 31 ' On the right side of the center line 17 is the device for tensioning the other blanket end 31 ', which has been placed around the blanket cylinder 2.
  • the components arranged on this right-hand side of the center line 17 are each provided with a 'after the reference symbol, for example tensioning shaft 3'.
  • the function of the entire device is as described below.
  • the rubber blanket 31 is brought with its reinforcing plate 32 according to FIG. 1 behind the hook bar 29 into the cutout 28.
  • the cam of the cam disk 16 disengages from the tappet 41.
  • the tappet 41 thus moves downward in accordance with the force of the compression spring 42.
  • the pin 39 brings the fork-like guide 38 down; the hook 34 grips behind the reinforcement plate 32 of the rubber blanket start 31 and is now in the position shown in FIG. 2.
  • the intermediate gear 11 is moved over the rack 27 by means of the clamping screw 21.
  • the rubber blanket is stretched.
  • the other tensioning shaft 3 can also be moved further in the direction of the arrow x in order to tension the rubber blanket further.
  • the clamping process is now complete.
  • the tensioning shaft 3 ' is moved by the amount of the angle ⁇ against the direction of the arrow x by rotating the tensioning screw 21'.
  • the tensioning shaft 3 ' is thus in the right position with the angle ⁇ according to FIG. 4.
  • the printing blanket is relaxed.
  • the tensioning shaft 3 is now brought into the left position according to FIG. 4 by means of the tensioning screw 21.
  • the beginning of the rubber blanket 31 has been adjusted in the direction of the arrow x by the angle ⁇ .
  • the possible damaged area of the printing blanket is now outside the printing area and is wholly or partially contained in the area of the angle ⁇ .
  • the angle ⁇ is a maximum of 135 o .

Landscapes

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

Abstract

In a device for fixing and tensioning a blanket on a cylinder of a printing machine, the rubber blanket is to be held while it is mounted, and a long end of the rubber blanket is then to be tensioned with little effort. <??>According to the invention, this is achieved in that there is a rack (27) which can be actuated by a straining screw (21) and is operatively connected via an intermediate gear wheel (11) to teeth on the circumference of the tensioning shaft (3), and in that a retaining device is provided for the beginning of the blanket, which retaining device can be actuated via the intermediate gear wheel by means of a cam disc (16) and a ram (41). <??>The device can be actuated with little effort. Due to the long tensioning path of the ends of the rubber blanket, the beginning of the blanket can be readjusted once or several times following wear phenomena and the like. <IMAGE>

Description

Die Erfindung betrifft eine Einrichtung zum Befestigen und Spannen eines Drucktuches auf einem Zylinder einer Druckmaschine gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a device for fastening and tensioning a printing blanket on a cylinder of a printing press according to the preamble of claim 1.

Im allgemeinen erfordert es von dem Drucker viel Geschick, das Gummituch auf den Gummituchzylinder aufzubringen, festzuhalten und zu spannen, da das am Druckende nicht eingespannte Gummituch während des Spannvorganges am Druckanfang aus der Halterung rutschen kann.In general, it requires a lot of skill from the printer to apply, hold and tension the blanket on the blanket cylinder, since the blanket that is not clamped at the end of the print can slip out of the holder during the tensioning process at the start of printing.

Gemäß DE-PS 29 53 815 ist eine Gummituchspannvorrichtung bekannt, bei welcher Gewindebolzen in der Zylindergrube angeordnet sind, welche über Hebelarme mit den Spannleisten für das Gummituch verbunden sind. Bei Betätigung der Gewindebolzen werden die Spannleisten verschwenkt und bewirken somit die Spannung des Gummituches. Das Spannen des Gummituches ist jedoch bezüglich des Spannweges stark begrenzt, da der Schwenkwinkel der Hebelarme begrenzt ist.According to DE-PS 29 53 815 a blanket tensioning device is known, in which threaded bolts are arranged in the cylinder pit, which are connected via lever arms to the tensioning strips for the blanket. When the threaded bolts are actuated, the tensioning strips are pivoted and thus cause the tension of the rubber blanket. Tensioning the rubber blanket is, however, very limited with regard to the tensioning path, since the swivel angle of the lever arms is limited.

Weiterhin ist gemäß DE 32 19 741 eine Gummituchspannvorrichtung bekannt, bei welcher in der Spannwelle ein Verriegelungselement angeordnet ist, das von einer Schließkurve selbsttätig in eine Verriegelungsstellung gedrückt wird. Die Spannwellen dieser Vorrichtung werden jeweils über Schneckensegmente und eine Schnecke sowie über Kegelradgetriebe mittels Spannschrauben betätigt, was einen hohen Kraftbedarf infolge des hohen Reibungswiderstandes der Schnecke zur Folge hat. Weiterhin ist der Spannweg der Spannwellen begrenzt, da sich die Verriegelungselemente in ihren Radien verändern. Somit kann ein längeres Gummituchende nicht festgeklemmt werden, welches später infolge Verschleißerscheinungen am Druckanfang umgehangen werden muß.Furthermore, according to DE 32 19 741 a blanket tensioning device is known, in which a locking element is arranged in the tensioning shaft is automatically pressed into a locking position by a closing curve. The tensioning shafts of this device are actuated via worm segments and a worm as well as via bevel gear by means of tensioning screws, which results in a high power requirement due to the high frictional resistance of the worm. Furthermore, the tensioning path of the tensioning shafts is limited because the locking elements change in their radii. Thus, a longer rubber blanket end cannot be clamped, which later has to be put around due to signs of wear at the start of printing.

Der Erfindung liegt die Aufgabe zugrunde, eine Einrichtung zum Befestigen und Spannen eines Drucktuches auf einem Zylinder einer Druckmaschine zu schaffen, welche es ermöglicht, das Gummituch während des Aufziehens festzuhalten und anschließend ein langes Gummituchende mit geringem Kraftaufwand zu spannen.The invention has for its object to provide a device for attaching and tensioning a blanket on a cylinder of a printing press, which makes it possible to hold the blanket while pulling and then tension a long blanket end with little effort.

Erfindungsgemäß wird diese Aufgabe durch den kennzeichnenden Teil des Patentanspruches 1 gelöst.According to the invention, this object is achieved by the characterizing part of patent claim 1.

Bei der Anwendung der Erfindung werden insbesondere nachfolgende Vorteile erzielt. Die Anordnung einer Arretierung , die durch die gleichen Bedienungselemente betätigt wird, mit denen das Gummituch gespannt wird, ermöglicht eine einfache Handhabung des Festhaltens des Drucktuchanfanges beim Befestigen des Drucktuches auf dem Zylinder. Durch den Einsatz eines Zahnradgetriebes wird beim Gummituchspannen in Verbindung mit einer Zahnstange eine Leichtgängigkeit erzielt, so daß nur noch ein geringer Kraftaufwand erforderlich ist, um die Spannwellen zu betätigen. Infolge eines langen Spannweges der Spannwellen um den Winkelbetrag-α ist es möglich, ein langes Reservestück eines Gummituchendes unterzubringen, damit dies im Falle von Verschleiß bzw. anderer Beschädigungen am Drucktuchanfang nachgesetzt werden kann.The following advantages are achieved in particular when using the invention. The arrangement of a lock, which is actuated by the same controls with which the rubber blanket is stretched, allows easy handling of holding the beginning of the blanket when attaching the blanket to the cylinder. Through the use of a toothed gear, smooth movement is achieved in the case of blanket tensioning in conjunction with a toothed rack, so that only a small amount of force is required to achieve the To actuate clamping shafts. As a result of a long tensioning path of the tensioning shafts by the angle α, it is possible to accommodate a long spare piece of a rubber blanket end so that this can be added in the event of wear or other damage at the beginning of the blanket.

Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden. In der zugehörigen Zeichnung zeigen

Fig. 1
einen Schnitt längs der Linie A - B nach Fig. 3 mit der Darstellung der erfindungsgemäßen Einrichtung im Zylinderkanal in Ruhestellung, jedoch mit am Druckanfang eingelegten Gummituchende;
Fig. 2
eine Darstellung gemäß Fig. 1, jedoch in Arbeitsstellung mit am Druckanfang eingelegtem und verriegeltem Gummituchende sowie dem am Druckende eingelegten und gespannten Gummituch;
Fig. 3
den Schnitt C - D nach Fig. 1;
Fig. 4
eine Darstellung gemäß Fig. 1, jedoch mit dem um den Winkel α nachgesetzten Gummituchanfang.
The invention will be explained in more detail below using an exemplary embodiment. Show in the accompanying drawing
Fig. 1
a section along the line A - B of Figure 3 with the representation of the device according to the invention in the cylinder channel in the rest position, but with inserted rubber blanket at the beginning of printing.
Fig. 2
a representation of Figure 1, but in the working position with inserted and locked rubber blanket end at the beginning of printing and the inserted and tensioned rubber blanket at the printing end.
Fig. 3
the section C - D of FIG. 1;
Fig. 4
a representation of FIG. 1, but with the beginning of the rubber blanket by the angle α.

Fig. 1 zeigt einen Querschnitt durch die erfindungsgemäße Einrichtung im Zylinderkanal in Ruhestellung gemäß der Linie A - B nach Fig. 3, jedoch mit am Druckanfang eingelegtem Gummituch. In der Zylindergrube 1 eines Gummituchzylinders 2 ist in bekannter Art und Weise eine in axialer Richtung verlaufende Spannwelle 3 angeordnet, welche an ihrem Umfang Zähne 4 aufweist. In einer Vertiefung 6 der Zylindergrube 1 ist ein Lagerbock 7 mittels Schrauben 5 befestigt, welcher eine Welle 8 trägt, die über eine Paßfeder 9 mit einem Zwischenzahnrad 11 drehfest verbunden ist. Die Welle 8 ist mittels Sicherungsringen 12; 13 auf dem Lagerbock 7 geführt. Mit der Welle 8 ist über eine Befestigungsschraube 14 eine Nockenscheibe 16 drehfest verbunden. In Richtung der in radialer Richtung verlaufenden Mittellinie 17 befindet sich in der Vertiefung 6 der Zylindergrube 1 eine Bohrung 18 mit Zusatzbohrung 19 zur Aufnahme einer Spannschraube 21. Die Spannschraube 21 stützt sich einerseits in der Nähe des Zylinderumfanges an einem Halteblech 22 ab, welches eine Bohrung 23 zum Betätigen der Spannschraube 21 aufweist und welches durch nicht dargestellte Stehbolzen in der Zylindergrube 1 befestigt ist. Die Spannschraube 21 stützt sich andererseits in der Zusatzbohrung 19 auf einem Drucklager 24 mit Zwischenscheibe 26 über einen Zapfen 25 ab. Die Spannschraube 21 ist über die Hälfte ihrer Länge mit einer Zahnstange 27 umgeben, welche ein Gewindeloch besitzt, das mit dem Gewinde der Spannschraube 21 in Wirkverbindung steht. Die Zahnstange 27 wird ebenfalls von dem Lagerbock 7 gehalten. Die Spannwelle 3 besitzt eine in axialer Richtung verlaufende Ausfräsung 28, welche eine Hakenleiste 29 für das Einhängen des Gummituchendes 31 mit dem Armierungsblech 32 sowie den Arm 33 einer hakenförmigen Arretierung aufnimmt. Die Arretierung besteht aus dem Arm 33 mit einem an seinem einen Ende rechtwinklig verlaufenden Haken 34. Die andere Seite des Armes 33 weist ein im Querschnitt etwa kreisförmig verlaufendes Lagerstück 36 auf, wobei sich das Lagerstück 36 in einer weiteren, zur Ausfräsung 28 in radialer Richtung der Spannwelle 3 befindlichen Ausnehmung 37 abstützt. Das Lagerstück 36 besitzt zwei rechtwinklig, in gleicher Richtung wie der Haken 34, verlaufende gabelartige Führungen 38, zu welchen beide Enden eines Stiftes 39 geführt sind. Der Stift 39 ist quer zur Längsachse durch das obere Ende eines Stößels 41 angeordnet. Der Stößel 41 steht an seinem unteren Ende mit der Nockenscheibe 16 in Wirkverbindung und ist gegen die Kraft einer den Stößel 41 umgebenden Druckfeder 42 betätigbar. Die Druckfeder 42 wird einerseits durch eine radiale Sacklochbohrung in der Spannwelle 3 und andererseits durch eine auf dem Stößel 41 arretierte Scheibe 43 begrenzt. Diese radiale Sacklochbohrung wird jedoch noch durch eine verlängerte Bohrung mit verringertem Durchmesser fortgesetzt zur Aufnahme des Stößels 41.Fig. 1 shows a cross section through the inventive device in the cylinder channel in the rest position according to the line A - B of FIG. 3, but with a rubber blanket inserted at the start of printing. In the cylinder pit 1 of a blanket cylinder 2, a tensioning shaft 3 extending in the axial direction is arranged in a known manner and has teeth 4 on its circumference. In a Recess 6 of the cylinder pit 1, a bearing block 7 is fastened by means of screws 5, which supports a shaft 8, which is connected in a rotationally fixed manner to an intermediate gear 11 via a feather key 9. The shaft 8 is by means of locking rings 12; 13 performed on the bearing block 7. A cam disk 16 is connected in a rotationally fixed manner to the shaft 8 via a fastening screw 14. In the direction of the center line 17 running in the radial direction, there is a bore 18 in the recess 6 of the cylinder pit 1 with an additional bore 19 for receiving a clamping screw 21. The clamping screw 21 is supported on the one hand near the cylinder circumference on a holding plate 22 which has a hole 23 for actuating the clamping screw 21 and which is fastened in the cylinder pit 1 by means of stud bolts, not shown. On the other hand, the clamping screw 21 is supported in the additional bore 19 on a thrust bearing 24 with an intermediate washer 26 via a pin 25. The clamping screw 21 is surrounded over half its length with a toothed rack 27 which has a threaded hole which is operatively connected to the thread of the clamping screw 21. The rack 27 is also held by the bearing block 7. The tensioning shaft 3 has a cutout 28 running in the axial direction, which receives a hook strip 29 for hanging the rubber blanket end 31 with the reinforcement plate 32 and the arm 33 of a hook-shaped locking device. The locking device consists of the arm 33 with a hook 34 which extends at a right angle at one end. The other side of the arm 33 has a bearing piece 36 which is approximately circular in cross section, whereby supports the bearing piece 36 in a further recess 37 which is located in the radial direction of the tensioning shaft 3 for the milling 28. The bearing piece 36 has two fork-like guides 38 running at right angles, in the same direction as the hook 34, to which both ends of a pin 39 are guided. The pin 39 is arranged transversely to the longitudinal axis through the upper end of a plunger 41. The tappet 41 is operatively connected at its lower end to the cam disk 16 and can be actuated against the force of a compression spring 42 surrounding the tappet 41. The compression spring 42 is delimited on the one hand by a radial blind hole in the tensioning shaft 3 and on the other hand by a disk 43 locked on the tappet 41. However, this radial blind hole is continued by an elongated bore with a reduced diameter for receiving the plunger 41.

Gemäß Fig. 1 und 2 besteht die Einrichtung zum Befestigen und Spannen eines Drucktuches auf einem Zylinder einer Druckmaschine aus einer in etwa auf der linken Seite der Mittellinie 17 der vorbeschriebenen Einrichtung, mit Hilfe welcher das Gummituchanfang 31 in der Spannwelle 3 während des Herumlegens um den Gummituchzylinder 2 festgehalten wird und gespannt werden kann. Auf der rechten Seite der Mittellinie 17 befindet sich die Einrichtung zum Spannen des anderen Gummituchendes 31', welches um den Gummituchzylinder 2 herumgelegt worden ist. Die auf dieser rechten Seite der Mittellinie 17 angeordneten Bauteile sind jeweils mit einem ' nach dem Bezugszeichen versehen, beispielsweise Spannwelle 3'.1 and 2, the device for fastening and tensioning a printing blanket on a cylinder of a printing press consists of an approximately on the left side of the center line 17 of the above-described device, with the aid of which the rubber blanket 31 in the tensioning shaft 3 during laying around the Blanket cylinder 2 is held and can be tensioned. On the right side of the center line 17 is the device for tensioning the other blanket end 31 ', which has been placed around the blanket cylinder 2. The components arranged on this right-hand side of the center line 17 are each provided with a 'after the reference symbol, for example tensioning shaft 3'.

Diese Teile sind auch in der oberen Darstellung der Fig. 3 enthalten. Der Unterschied zwischen den beiden Einrichtungen besteht darin, daß die rechte Einrichtung nicht zum Festhalten beim Herumlegen, sondern nur zum Spannen vorgesehen ist und demzufolge eine Nockenscheibe, ein Stößel, eine Feder, ein Lagerstück mit Arm und Haken nicht benötigt wird. Die übrigen Bauteile werden jedoch benötigt.These parts are also included in the upper illustration in FIG. 3. The difference between the two devices is that the right device is not intended to hold when lying around, but only for tensioning and therefore a cam, a plunger, a spring, a bearing piece with arm and hook is not required. However, the remaining components are required.

Die Funktion der gesamten Einrichtung ist wie nachfolgend beschrieben. Der Gummituchanfang 31 wird mit seinem Armierungsblech 32 gemäß Fig. 1 hinter die Hakenleiste 29 in die Ausfräsung 28 gebracht. Durch Bewegen des Zwischenzahnrades 11 in Pfeilrichtung x kommt der Nocken der Nockenscheibe 16 außer Eingriff mit dem Stößel 41. Somit bewegt sich der Stößel 41 entsprechend der kraft der Druckfeder 42 nach unten. Der Stift 39 bringt die gabelartige Führung 38 nach unten; der Haken 34 faßt hinter das Armierungsblech 32 des Gummituchanfangs 31 und befindet sich nunmehr in der Stellung nach Fig. 2. Das Zwischenzahnrad 11 wird dabei über die Zahnstange 27 mittels der Spannschraube 21 bewegt.The function of the entire device is as described below. The rubber blanket 31 is brought with its reinforcing plate 32 according to FIG. 1 behind the hook bar 29 into the cutout 28. By moving the intermediate gear 11 in the direction of the arrow x, the cam of the cam disk 16 disengages from the tappet 41. The tappet 41 thus moves downward in accordance with the force of the compression spring 42. The pin 39 brings the fork-like guide 38 down; the hook 34 grips behind the reinforcement plate 32 of the rubber blanket start 31 and is now in the position shown in FIG. 2. The intermediate gear 11 is moved over the rack 27 by means of the clamping screw 21.

Nach dem Herumlegen des Gummituches um den Gummituchzylinder 2 wird das Armierungsblech 32' des Gummituchendes 31' mit der Hakenleiste 29' in die Ausnehmung der Spannwelle 3' eingebracht und das Zwischenzahnrad 11' wird in Pfeilrichtung x mittels der Spannschraube 21' sowie der Zahnstange 27' bewegt, so daß sich die Spannwelle 3' ebenfalls in Pfeilrichtung x bewegt. Das Gummituch ist gespannt. Ebenfalls kann die andere Spannwelle 3 auch noch in Pfeilrichtung x weiterbewegt werden, um das Gummituch weiter zu spannen. Damit ist der Spannvorgang abgeschlossen.After placing the rubber blanket around the rubber blanket cylinder 2, the reinforcement plate 32 'of the rubber blanket end 31' with the hook bar 29 'is inserted into the recess in the tensioning shaft 3' and the intermediate gear 11 'is moved in the direction of the arrow x by means of the tensioning screw 21' and the rack 27 ' moves so that the tension shaft 3 'also in the direction of arrow x emotional. The rubber blanket is stretched. The other tensioning shaft 3 can also be moved further in the direction of the arrow x in order to tension the rubber blanket further. The clamping process is now complete.

Soll das Drucktuch beispielsweise wegen Verschleiß nachgesetzt werden, so ist wie folgt zu verfahren. Gemäß Fig. 2 und 3 wird durch das Verdrehen der Spannschraube 21' die Spannwelle 3' entgegen der Pfeilrichtung x um den Winkelbetrag α bewegt. Somit befindet sich die Spannwelle 3' in der rechten Position mit dem Winkel α nach Fig. 4. Das Drucktuch ist entspannt. Jetzt wird die Spannwelle 3 vermittelst der Spannschraube 21 in die linke Position nach Fig. 4 gebracht. Der Gummituchanfang 31 ist in Pfeilrichtung x um den Winkel α nachgestellt worden. Die mögliche schadhafte Stelle des Drucktuches befindet sich jetzt außerhalb des Druckbereiches und ist ganz oder teilweise im Bereich des Winkels α enthalten. Der Winkel α beträgt maximal 135o.If, for example, the printing blanket is to be replaced due to wear, proceed as follows. 2 and 3, the tensioning shaft 3 'is moved by the amount of the angle α against the direction of the arrow x by rotating the tensioning screw 21'. The tensioning shaft 3 'is thus in the right position with the angle α according to FIG. 4. The printing blanket is relaxed. The tensioning shaft 3 is now brought into the left position according to FIG. 4 by means of the tensioning screw 21. The beginning of the rubber blanket 31 has been adjusted in the direction of the arrow x by the angle α. The possible damaged area of the printing blanket is now outside the printing area and is wholly or partially contained in the area of the angle α. The angle α is a maximum of 135 o .

TeilelisteParts list

11
ZylindergrubeCylinder pit
1'1'
ZylindergrubeCylinder pit
22nd
GummituchzylinderBlanket cylinder
33rd
SpannwelleTension shaft
3'3 '
SpannwelleTension shaft
44th
Zähneteeth
4'4 '
Zähneteeth
55
Schraubescrew
5'5 '
Schraubescrew
66
Vertiefungdeepening
6'6 '
Vertiefungdeepening
77
LagerbockBearing block
7'7 '
LagerbockBearing block
88th
Wellewave
8'8th'
Wellewave
99
Paßfederadjusting spring
9'9 '
Paßfederadjusting spring
1010th
--
1111
ZwischenzahnradIdler gear
11'11 '
ZwischenzahnradIdler gear
1212
SicherungsringCirclip
12'12 '
SicherungsringCirclip
1313
SicherungsringCirclip
13'13 '
SicherungsringCirclip
1414
BefestigungsschraubeMounting screw
1515
--
1616
NockenscheibeCam disc
1717th
MittellinieCenter line
1818th
Bohrungdrilling
18'18 '
Bohrungdrilling
1919th
ZusatzbohrungAdditional hole
19'19 '
ZusatzbohrungAdditional hole
2020th
--
2121
SpannschraubeClamping screw
21'21 '
SpannschraubeClamping screw
2222
HalteblechBracket
22'22 '
HalteblechBracket
2323
Bohrungdrilling
23'23 '
Bohrungdrilling
2424th
DrucklagerThrust bearing
24'24 '
DrucklagerThrust bearing
2525th
ZapfenCones
25'25 '
ZapfenCones
2626
ZwischenscheibeWasher
26'26 '
ZwischenscheibeWasher
2727
ZahnstangeRack
27'27 '
ZahnstangeRack
2828
AusfräsungMilling
28'28 '
AusfräsungMilling
2929
HakenleisteHook bar
29'29 '
HakenleisteHook bar
3030th
--
3131
GummituchanfangBlanket start
31'31 '
GummituchendeBlanket ends
3232
ArmierungsblechReinforcement plate
32'32 '
ArmierungsblechReinforcement plate
3333
Armpoor
3434
Hakenhook
3535
--
3636
LagerstückStock piece
3737
AusnehmungRecess
3838
Führungguide
3939
Stiftpen
4040
--
4141
StößelPestle
4242
DruckfederCompression spring
4343
Scheibedisc

Claims (11)

Einrichtung zum Befestigen und Spannen eines Drucktuches auf einen Zylinder (2) einer Druckmaschine, wobei die Einrichtung in einer achsparallelen Grube (1) angeordnet ist und Spannspindeln (3) zum Spannen eines Gummituches mit einer Befestigungseinrichtung (28; 29; 32) für den Gummituchanfang (31) und das Gummituchende (31') besitzt, dadurch gekennzeichnet, daß eine durch eine Spannschraube (21; 21') betätigbare Zahnstange (27; 27') angeordnet ist, die über ein Zwischenzahnrad (11; 11') mit Zähnen am Umfang der Spannwelle (3; 3') in Wirkverbindung steht, daß eine Arretierung für den Gummituchanfang (31) vorgesehen ist, die über das Zwischenzahnrad (11) mittels einer Nockenscheibe (16) und einem Stößel (41) betätigbar ist.Device for fastening and tensioning a printing blanket on a cylinder (2) of a printing press, the device being arranged in an axially parallel pit (1) and tensioning spindles (3) for tensioning a blanket with a fastening device (28; 29; 32) for the beginning of the blanket (31) and the rubber blanket end (31 '), characterized in that a rack (27; 27') which can be actuated by a tensioning screw (21; 21 ') is arranged and which has teeth on an intermediate toothed wheel (11; 11') The circumference of the tensioning shaft (3; 3 ') is operatively connected so that a locking device for the rubber blanket start (31) is provided which can be actuated via the intermediate gear (11) by means of a cam disk (16) and a tappet (41). Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Arretierung aus einem Arm (33) besteht, der an seinem einen Ende einen zur Längsachse des Armes rechtwinklig angeordneten Haken (34) und an seinem anderen Ende ein im Querschnitt etwa kreisförmiges Lagerstück (36) aufweist.Device according to claim 1, characterized in that the locking device consists of an arm (33) which has at one end a hook (34) arranged at right angles to the longitudinal axis of the arm and at its other end a bearing piece (36) which is approximately circular in cross section . Einrichtung nach Anspruch 1 und 2, dadurch gekennzeichnet, daß das Lagerstück (36) eine rechtwinklig verlaufende gabelartige Führung (38) aufweist.Device according to claims 1 and 2, characterized in that the bearing piece (36) has a fork-like guide (38) running at right angles. Einrichtung nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß rechtwinklig zur Längsachse des Stößels (41) ein Stift (39) angeordnet ist, der mit der gabelartigen Führung (38) in Wirkverbindung steht.Device according to claims 1 to 3, characterized in that a pin (39) is arranged at right angles to the longitudinal axis of the plunger (41) and is operatively connected to the fork-like guide (38). Einrichtung nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß der Stößel (41) über die Nockenscheibe (16) gegen die Kraft einer Druckfeder (42) betätigbar ist.Device according to Claims 1 to 4, characterized in that the tappet (41) can be actuated via the cam disc (16) against the force of a compression spring (42). Einrichtung nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß das Zwischenzahnrad (11) fest mit der Nockenscheibe (16) verbunden ist.Device according to claims 1 to 5, characterized in that the intermediate gear (11) is firmly connected to the cam disc (16). Einrichtung nach Anspruch 1 bis 6, dadurch gekennzeichnet, daß die Zahnstange (27; 27') eine axiale Gewindebohrung aufweist, mit welcher die Spannschraube (21; 21') in Wirkverbindung steht.Device according to claims 1 to 6, characterized in that the toothed rack (27; 27 ') has an axial threaded bore with which the clamping screw (21; 21') is operatively connected. Einrichtung nach Anspruch 1 bis 7, dadurch gekennzeichnet, daß die Spannschraube (21; 21') einerseits gegen ein Halteblech (22; 22') und andererseits gegen ein Drucklager (24; 24') mit Zwischenscheibe (26; 26') abstützbar ist.Device according to claims 1 to 7, characterized in that the clamping screw (21; 21 ') can be supported on the one hand against a holding plate (22; 22') and on the other hand against a thrust bearing (24; 24 ') with an intermediate washer (26; 26') . Einrichtung nach Anspruch 1 bis 8, dadurch gekennzeichnet, daß die Nockenscheibe (16) über eine Welle (8) mit dem Zwischenzahnrad (11) verbunden ist.Device according to claims 1 to 8, characterized in that the cam disc (16) is connected to the intermediate gear (11) via a shaft (8). Einrichtung nach Anspruch 1 bis 9, dadurch gekennzeichnet, daß die Welle (8; 8'), die Zahnstange (27; 27') sowie die Nockenscheibe (16) auf einem Lagerbock (7; 7') angeordnet sind, der durch Schrauben (5; 5') im Boden einer Aussparung (6; 6') in der Zylindergrube (1; 1') befestigt ist.Device according to Claims 1 to 9, characterized in that the shaft (8; 8 '), the toothed rack (27; 27') and the cam disc (16) are arranged on a bearing block (7; 7 ') which is secured by screws ( 5; 5 ') in the bottom of a recess (6; 6') in the cylinder pit (1; 1 '). Einrichtung nach Anspruch 1 bis 10, dadurch gekennzeichnet, daß je Gummituchzylinder (2) zumindest zwei Spanneinrichtungen sowie eine Arretierung für den Gummituchanfang (31) vorgesehen ist.Device according to claims 1 to 10, characterized in that at least two tensioning devices and a locking device for the rubber blanket start (31) are provided for each rubber blanket cylinder (2).
EP92113947A 1991-08-22 1992-08-17 Device for fixing and tensioning a blanket on a cylinder of a printing machine Expired - Lifetime EP0529446B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4127714A DE4127714A1 (en) 1991-08-22 1991-08-22 DEVICE FOR FASTENING AND TENSIONING A PRINT SCARF ON A CYLINDER OF A PRINTING MACHINE
DE4127714 1991-08-22

Publications (2)

Publication Number Publication Date
EP0529446A1 true EP0529446A1 (en) 1993-03-03
EP0529446B1 EP0529446B1 (en) 1995-12-06

Family

ID=6438787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92113947A Expired - Lifetime EP0529446B1 (en) 1991-08-22 1992-08-17 Device for fixing and tensioning a blanket on a cylinder of a printing machine

Country Status (4)

Country Link
US (1) US5315931A (en)
EP (1) EP0529446B1 (en)
JP (1) JPH05220935A (en)
DE (2) DE4127714A1 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP0737574A2 (en) * 1992-12-24 1996-10-16 KOENIG &amp; BAUER-ALBERT AKTIENGESELLSCHAFT Tensioning device in a rotary printing machine

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DE4326248C2 (en) * 1992-12-24 1996-05-15 Koenig & Bauer Albert Ag Clamping device in a rotary printing machine
DE9317726U1 (en) * 1992-12-24 1994-02-03 Koenig & Bauer AG, 97080 Würzburg spindle
DE4326250C2 (en) * 1993-08-05 1996-05-15 Koenig & Bauer Albert Ag Clamping device in a rotary printing machine
DE4326251C2 (en) * 1993-08-05 1997-08-28 Koenig & Bauer Albert Ag Rubber / blanket cylinder
DE19515632C2 (en) * 1995-04-28 2000-11-30 Koenig & Bauer Ag Device for adjusting front marks on a cylinder in a sheet-fed rotary printing press
US6026746A (en) * 1998-09-22 2000-02-22 E. R. Smith Associates, Inc. Lock-up assembly for plate cylinders of rotary presses
DE10224301B4 (en) 2001-07-30 2022-06-15 Heidelberger Druckmaschinen Ag Device for holding and tensioning a cylinder winding device
JP2009160927A (en) * 2007-12-13 2009-07-23 Komori Corp Mounting apparatus of blanket or plate
US8397636B2 (en) * 2010-09-22 2013-03-19 E I Du Pont De Nemours And Company Method and apparatus for tensioning a printing form
DE102019111510A1 (en) 2019-05-03 2020-11-05 Koenig & Bauer Ag Printing unit for an offset printing machine with a rubber cylinder carrying at least one rubber blanket and a method for handling a rubber blanket

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GB266520A (en) * 1926-02-01 1927-03-03 Fred Wesley Wright Improvements in and relating to tensioning devices for blankets and printing plates in printing machines
FR2381623A1 (en) * 1977-02-23 1978-09-22 Roland Offsetmaschf DEVICE FOR PLACING A BLANKET ON A CYLINDER OF A PRINTING MACHINE

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Publication number Priority date Publication date Assignee Title
GB266520A (en) * 1926-02-01 1927-03-03 Fred Wesley Wright Improvements in and relating to tensioning devices for blankets and printing plates in printing machines
FR2381623A1 (en) * 1977-02-23 1978-09-22 Roland Offsetmaschf DEVICE FOR PLACING A BLANKET ON A CYLINDER OF A PRINTING MACHINE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0737574A2 (en) * 1992-12-24 1996-10-16 KOENIG &amp; BAUER-ALBERT AKTIENGESELLSCHAFT Tensioning device in a rotary printing machine
EP0675808B1 (en) * 1992-12-24 1997-03-19 KOENIG &amp; BAUER-ALBERT AKTIENGESELLSCHAFT Clamp in a rotary press
EP0737574B1 (en) * 1992-12-24 1999-05-19 Koenig &amp; Bauer Aktiengesellschaft Tensioning device in a rotary printing machine

Also Published As

Publication number Publication date
JPH05220935A (en) 1993-08-31
DE4127714C2 (en) 1993-08-05
EP0529446B1 (en) 1995-12-06
DE4127714A1 (en) 1993-02-25
DE59204571D1 (en) 1996-01-18
US5315931A (en) 1994-05-31

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