DE20121723U1

DE20121723U1 - Method for stretching cover onto print cylinder has reinforced ends of cover clamped into securing slot and with one end secured by a tensioning grip

Info

Publication number: DE20121723U1
Application number: DE20121723U
Authority: DE
Original assignee: Koenig and Bauer AG
Current assignee: Koenig and Bauer AG
Priority date: 2001-11-28
Filing date: 2001-11-28
Publication date: 2003-04-17
Anticipated expiration: 2011-11-29

Abstract

A method for stretching a cover onto a print cylinder has a slot across the cylinder into which one end of the cover is pressed. The slot also holds a rotating grip with a second slot. The trailing end of the cover is pressed into the rotating slot, which is turned to set the tension. The ends of the cover are fitted to bars which are gripped by the slots. The rotating tensioning grip is driven by a worm gear operated from outside the roller.

Description

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BeschreibungDescription

Vorrichtungen zum Befestigen eines Aufzuges auf dem Zylinder einer DruckmaschineDevices for attaching a cover to the cylinder of a printing press

Die Erfindung betrifft Vorrichtungen zum Befestigen eines Aufzuges auf dem Zylinder einer Druckmaschine gemäß dem Oberbegriff des Anspruchs 1, 2 oder 3.The invention relates to devices for fastening a packing to the cylinder of a printing press according to the preamble of claim 1, 2 or 3.

Der Erfindung liegt die Aufgabe zugrunde, Vorrichtungen zum Befestigen eines Aufzuges auf dem Zylinder einer Druckmaschine zu schaffen.The invention is based on the object of creating devices for fastening a packing to the cylinder of a printing press.

Die Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1, 2 oder 3 gelöst.The object is achieved according to the invention by the features of claim 1, 2 or 3.

Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, dass mittels der Vorrichtung eine baulich einfache Möglichkeit geschaffen wurde, mit welche ein Aufzug auf einem Zylinder einer Druckmaschine befestigt und gespannt werden kann. Insbesondere spannt die Vorrichtung den Aufzug auf den richtigen Zug auch dann, wenn z. B. nach einer gewissen Betriebszeit sich die Aufzuglänge und/oder das elastische Verhalten des Aufzuges verändert hat. Besonders geeignet ist die Vorrichtung für Zylinder mit in Umfangsrichtung äußerst geringer Kanalöffnung, z. B. kleiner 3 mm, da weder ein Spannweg in Umfangsrichtung, noch ein Bedienen durch die Kanalöffnung erforderlich ist.The advantages that can be achieved with the invention are in particular that the device provides a structurally simple way of fastening and tensioning a cover on a cylinder of a printing press. In particular, the device tensions the cover to the correct tension even if, for example, the cover length and/or the elastic behavior of the cover has changed after a certain period of operation. The device is particularly suitable for cylinders with an extremely small channel opening in the circumferential direction, e.g. less than 3 mm, since neither a tensioning path in the circumferential direction nor operation through the channel opening is required.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown in the drawing and is described in more detail below.

Es zeigen:Show it:

Fig. 1 eine Darstellung der Vorrichtung während der Montage;Fig. 1 is a representation of the device during assembly;

Fig. 2 eine Darstellung der Vorrichtung bei befestigtem Aufzug.Fig. 2 shows the device with the elevator attached.

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Auf einer Mantelfläche eines Zylinders 01 (Fig. 1), z. B. ein Formzylinder oder Übertragungszylinder, soll ein Aufzug 02, z. B. einer Druckform oder einem Gummituch mit verstärkten Kanten an deren Enden, oder ein sog. Metalldrucktuch, befestigt und/oder gespannt werden. Hierzu wird beispielsweise ein erstes Ende in einen entsprechend geformten Kanal eingehängt. Z. B. gibt eine Spannvorrichtung in einer nicht dargestellten ersten Stellung einen später zu verengenden Raum für das Einführen frei, oder aber das Ende ist steif und abgekantet. Der Aufzug 02 wird nun um den Zylinder 01 gewickelt. Das zweite Ende wird in den selben - oder bei Zylindern doppelten Umfangs in einen in Umfangsrichtung zweiten - Kanal geführt und mit einer im Kanal befindlichen Spannvorrichtung 03; z. B. einer Spindel 03 oder einem Spannhebel 03, in Wirkbindung gebracht, d. h. derart mit dieser verbunden, dass mit Verschwenken der Spindel 03 der Aufzug 02 eine Bewegung und/oder einen Zug ins innere des Kanals erfährt.A dressing 02, e.g. a printing forme or a rubber blanket with reinforced edges at the ends, or a so-called metal printing blanket, is to be fastened and/or tensioned on the outer surface of a cylinder 01 (Fig. 1), e.g. a forme cylinder or transfer cylinder. To do this, for example, a first end is hooked into a correspondingly shaped channel. For example, a tensioning device in a first position (not shown) frees up a space for insertion that is to be narrowed later, or the end is stiff and folded. The dressing 02 is now wound around the cylinder 01. The second end is guided into the same channel - or, in the case of cylinders with twice the circumference, into a second channel in the circumferential direction - and brought into operative connection with a tensioning device 03 located in the channel, e.g. a spindle 03 or a tensioning lever 03. connected thereto in such a way that when the spindle 03 is pivoted, the elevator 02 experiences a movement and/or a pull into the interior of the channel.

Die Spindel 03 weist mindestens in einem Bereich, insbesondere im Bereich mindestens eines Endes ein Schneckenrad auf, welches in Wirkverbindung zu einer Schnecke 04, z. B. einem schneckenförmigen Außengewinde eines Stopfens 04, steht, welcher in einer Bohrung im Zylinder 01 um eine Drehachse im wesentlichen senkrecht zur Schwenkachse der Spindel 03 verdrehbar ist. Auf der dem Inneren des Zylinders 01 zugewandten Seite der Schnecke 04 ist mindestens eine sich am Boden der Bohrung abstützende Feder 06, z. B. mehrere Blattfedern 06, angeordnet. Die Wirkrichtung der Feder 06 verläuft parallel zur Drehachse der Schnecke 06, und drückt diesen in Richtung Mantelfläche des Zylinders 01 gegen einen Anschlag 07. Das Gewinde der Schnecke 04 wirkt nicht mit Bohrung zusammen, so dass die Schnecke 03 allein auch grundsätzlich ohne Drehbewegung in ihrer axialen Richtung bewegbar ist.The spindle 03 has a worm wheel in at least one area, in particular in the area of at least one end, which is operatively connected to a worm 04, e.g. a worm-shaped external thread of a plug 04, which can be rotated in a bore in the cylinder 01 about an axis of rotation essentially perpendicular to the pivot axis of the spindle 03. On the side of the worm 04 facing the interior of the cylinder 01, at least one spring 06, e.g. several leaf springs 06, is arranged, which is supported on the bottom of the bore. The direction of action of the spring 06 runs parallel to the axis of rotation of the worm 06, and presses it in the direction of the outer surface of the cylinder 01 against a stop 07. The thread of the worm 04 does not interact with the bore, so that the worm 03 can also be moved in its axial direction on its own, in principle without any rotational movement.

Ist nun das zweite, z. B. nachlaufende Ende des Aufzuges in eine Ausnehmung auf einer Mantelfläche der Spindel 03 eingeführt, so läßt sich mittels Verdrehens der Schnecke 04, z. B. über ein entsprechenden Imbus, die Spindel 03 verschwenken und der Aufzug 02 inIf the second, e.g. trailing end of the winding mechanism is now inserted into a recess on a surface of the spindle 03, the spindle 03 can be pivoted by turning the worm 04, e.g. using a corresponding Allen key, and the winding mechanism 02 can be moved into

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den Kanal ziehen. Ein weiteres Verdrehen bewirkt ein Spannen des Aufzuges bis zu dem Moment, wenn der Zug im Aufzug, d. h. die Rückstellkraft, so groß ist wie die Kraft der Feder bei sich noch am Anschlag 07 abstützender Schnecke 04. Wird weiter gedreht, so schraubt sich die Schnecke 04 nun an der Spindel 03 weiter in die Bohrung hinein, vom Anschlag 07 weg (Fig. 2) - der Aufzug 02 ist nun z. B. in gewünschter Weise gespannt (Fig. 2), die Spindel 03 befindet sich in ihrer Betriebsstellung. Verlängert sich nun beispielsweise der Aufzug 02 während des Drückens oder ermüdet das Material, so spannt bzw. zieht nun die Feder 06 den Aufzug 02 in der Weise nach, dass die Schnecke 04 (ohne dass er, z. B. aufgrund der Reibeung des Schneckengetriebes und/oder einer Verdrehsicherung, verdreht wird.) nach außen gedrückt wird und so als Mitnehmerverbindung die Spindel 03 verdreht. Der Aufzug 02 wird in den Kanal gezogen und gespannt. Weist die Spindel 03 z. B. eine Aussparung oder Abflachung für das Einführen des ersten Endes auf, so kann bei weiterem Verdrehen der Spindel 03 gleichzeitig mit dem zweiten Ende auch das erste Ende weiter in den Kanal gezogen werden. Die Vorrichtung weist nach Verdrehen der Schnecke 04 somit durch den Anschlag 07 eine Wegbegrenzung für ein maximales Lösen auf und ermöglicht gleichzeitig ein selbsttätiges Nachspannen bzw. Nachziehen des Aufzuges während des Betriebs. Die Federkraft ist individuell auf einfache Weise durch Wahl der Anzahl und/oder Federhärte auf einfache Weise ohne hohen Aufwand im Hinblick auf die Zugänglichkeit einstellbar.the channel. Further turning causes the elevator to be tensioned until the moment when the tension in the elevator, i.e. the restoring force, is as great as the force of the spring with the worm 04 still supported on the stop 07. If it is turned further, the worm 04 screws itself further into the hole on the spindle 03, away from the stop 07 (Fig. 2) - the elevator 02 is now tensioned in the desired manner (Fig. 2), the spindle 03 is in its operating position. If, for example, the elevator 02 lengthens during pressing or the material fatigues, the spring 06 tensions or pulls the elevator 02 in such a way that the worm 04 is pushed outwards (without it being twisted, e.g. due to the friction of the worm gear and/or an anti-twist device) and thus twists the spindle 03 as a driver connection. The elevator 02 is pulled into the channel and tensioned. If the spindle 03 has, for example, a recess or flattened area for inserting the first end, then if the spindle 03 is turned further, the first end can be pulled further into the channel at the same time as the second end. After turning the worm 04, the device has a travel limit for maximum loosening through the stop 07 and at the same time enables the elevator to be automatically re-tensioned or tightened during operation. The spring force can be individually adjusted in a simple manner by selecting the number and/or spring hardness without requiring a great deal of effort in terms of accessibility.

Claims

1. Device for fastening at least one covering (02) with a first and a second end on the cylinder (01) of a printing press, wherein at least the second end of the at least one covering (02) can be brought into operative connection with a pivotable tensioning lever (03) arranged in a channel for fastening, and wherein the tensioning lever (03) in its operating position holding the end of the covering (02) is pretensioned by means of spring force in a direction opposite to a direction of movement for releasing the covering (02), characterized in that the covering (02) is designed as a rubber blanket (02), both ends of which have a reinforced edge for fastening in the channel.

2. Device for fastening at least one covering (02) with a first and a second end on the cylinder (01) of a printing press, wherein at least the second end of the at least one covering (02) can be brought into operative connection for fastening with a pivotable tensioning lever (03) arranged in a channel, and wherein the tensioning lever (03) in its operating position holding the end of the covering (02) is pretensioned by means of spring force in a direction opposite to a direction of movement for releasing the covering (02), characterized in that the covering (02) is designed as a rubber blanket (02), the first end of which is suspended at an acute angle in a correspondingly shaped channel.

3. Device for fastening at least one cover (02) with a first and a second end on the cylinder (01) of a printing press, wherein at least the second end of the at least one cover (02) can be brought into operative connection with a pivotable tensioning lever (03) arranged in a channel for fastening, and wherein the tensioning lever (03) in its operating position holding the second end of the cover (02) is pretensioned by means of spring force in a direction opposite to a direction of movement for the release of the cover (02), characterized in that the first end of the cover (02), the channel and/or the tensioning lever (03) are designed to work together in such a way that the first end of the at least one cover (02) can be inserted into the channel in a first position of the tensioning lever (03), and in another position when the tensioning lever (03) is pivoted can also be pulled into the channel.

4. Device according to claim 1, 2 or 3, characterized in that the second end can be brought into operative connection with the tensioning lever (03) in such a way that when the tensioning lever (03) is pivoted, the elevator (02) experiences a movement and/or pull into the interior of the channel.

5. Device according to claim 4, characterized in that the second end has a reinforcement which can be received in a recess in the clamping lever (03).

6. Device according to claim 2 or 3, characterized in that the elevator (02) is designed as a rubber blanket (02), both ends of which have a reinforced edge for fastening in the channel.

7. Device according to claim 1 or 3, characterized in that the elevator (02) is designed as a rubber blanket (02), the first end of which is suspended at an acute angle in a correspondingly shaped channel.

8. Device according to claim 1 or 2, characterized in that the first end has a reinforced edge which is held in the channel in cooperation with a correspondingly shaped recess in the latter.

9. Device according to claim 1 or 2, characterized in that the first end of the at least one elevator (02) can be introduced into the channel in a first position of the tensioning lever (03) by releasing a space, and in another position of the tensioning lever (03) the first end in the channel is secured against escape by narrowing the space.

10. Device according to claim 1, 2 or 3, characterized in that the clamping lever (03) is rotatable via a worm wheel and a worm (04) movable in its axial direction.

11. Device according to claim 1, 2 or 3, characterized in that the clamping lever (03) can be pivoted by the worm (04) by a rotational movement as well as a movement of the same in its axial direction.

12. Device according to claim 1, 2 or 3, characterized in that the clamping lever (03) is pre-tensioned by means of at least one spring (06) in a bore in a direction for actuating the clamping lever (03) in the clamping direction.

13. Device according to claim 12, characterized in that the bore is arranged in the circumferential direction next to the channel on the side of the second, trailing end in the cylinder.

14. Device according to claim 1, 2, 3 or 9, characterized in that the clamping lever (03) has a flattened portion to release a space for the insertion of the first end into the channel.

15. Device according to claim 1, 2, 3 or 9, characterized in that the clamping lever (03) has a recess for releasing a space for the insertion of the first end into the channel.

16. Device according to claim 12, characterized in that the spring (06) is designed as a plurality of leaf springs.

17. Device according to claim 16, characterized in that the spring force of the preload can be individually adjusted by the number of leaf springs.

18. Device according to claim 12 or 16, characterized in that the spring force of the preload can be individually adjusted by selecting the spring hardness.

19. Device according to claim 2 or 3, characterized in that the cover (02) is designed as a rubber blanket (O02), both ends of which have a reinforced edge for fastening in the channel.

20. Device according to claim 1 or 3, characterized in that the elevator (02) is designed as a rubber blanket (02), the first end of which is suspended at an acute angle around a correspondingly shaped channel.

21. Device according to claim 1, 2 or 3, characterized in that the channel has a width of less than 3 mm in the circumferential direction in the region of its opening to the jacket surface.

22. Device according to claim 1, 2 or 3, characterized in that the rubber blanket is designed as a metal printing blanket.

23. Device according to claim 22, characterized in that the first end is rigid and beveled.