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EP0425936B1 - Device for quickly registering, fixing and tensioning printing plates - Google Patents

Device for quickly registering, fixing and tensioning printing plates Download PDF

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Publication number
EP0425936B1
EP0425936B1 EP90120084A EP90120084A EP0425936B1 EP 0425936 B1 EP0425936 B1 EP 0425936B1 EP 90120084 A EP90120084 A EP 90120084A EP 90120084 A EP90120084 A EP 90120084A EP 0425936 B1 EP0425936 B1 EP 0425936B1
Authority
EP
European Patent Office
Prior art keywords
tensioning
cylinder
clamping
lever
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90120084A
Other languages
German (de)
French (fr)
Other versions
EP0425936A2 (en
EP0425936A3 (en
Inventor
Manfred Herold
Herbert Rebel
Roland Höll
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
Priority to AT90120084T priority Critical patent/ATE99601T1/en
Publication of EP0425936A2 publication Critical patent/EP0425936A2/en
Publication of EP0425936A3 publication Critical patent/EP0425936A3/en
Application granted granted Critical
Publication of EP0425936B1 publication Critical patent/EP0425936B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F27/00Devices for attaching printing elements or formes to supports
    • B41F27/12Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1218Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F27/00Devices for attaching printing elements or formes to supports
    • B41F27/12Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1218Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/1225Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly
    • B41F27/1231Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly by translatory motion substantially tangential to support surface

Definitions

  • the invention relates to a device for precise clamping and clamping of printing plates on the plate cylinder according to the preamble of the first claim.
  • a device according to the preamble of claim 1 is known from DE-PS 3 516 682 and enables, in a manner known per se, the clamping of the printing plate at the beginning and end of printing by rotating the eccentric shafts associated with the corresponding tensioning rails by means of a hand-operated tool.
  • the subsequent tensioning of the pressure plate is carried out manually using a tool in which the tensioning rail at the end of the print is displaced almost in the circumferential direction by a central actuating device and a pressure bar.
  • the disadvantage here is that several manual manipulations on the cylinder channel are necessary and automatic re-tensioning is not guaranteed while the machine is running.
  • DE-OS 3 843 433 describes a device for rapid clamping of printing plates, the eccentric shafts causing the clamping and clamping on the cylinder side wall each being provided with double roller levers and for clamping, unclamping, clamping, relaxing via an actuator fixed to the frame after a corresponding angular positioning of the Plate cylinders are rotatable.
  • EP-A2 0 260 492 also describes a technically similar route, with the eccentric shafts on the cylinder side wall instead carry double simple lever arms and can be rotated by pulling or pushing through a frame-side actuator
  • DE-OS 3 843 395 shows a further device for precise rapid clamping.
  • the clamping and clamping device is assigned at least one common actuating device arranged on the machine frame and corresponding to the angular position of the plate cylinder at the time of clamping and clamping. Clamping and tensioning takes place via axially displaceable pull wedge gears, which can be moved by the actuating devices arranged on both sides of the cylinder side walls.
  • clamping is not possible while the machine is running.
  • Another disadvantage is that the forces for clamping, unclamping, tensioning and relaxing always act axially and must therefore be absorbed by the bearings of the plate cylinder.
  • the object of the invention is to expand the input-specified device so that a clamping and tensioning of the printing plate can be carried out precisely with a minimum of handling effort, regulating the tension of printing plates and their automatic re-tensioning is made possible uniformly over the entire width, in particular in the case of large-format printing plates and also the design disadvantages mentioned in the prior art can be avoided.
  • the plate cylinder 1 is supported on both sides by frame walls 2 of the printing press in bearings, not shown. In its cylinder channel it has 3 means for clamping and tensioning printing plates. 1, 3 and 5, these means are designed as a front and rear tensioning rail 4, 5 assigned to the beginning and the end of printing, each consisting of an upper clamping device 4.1, 5.1, a lower clamping device 4.2, 5.2 and actuatable by eccentric shafts 4.3, 5.3. These tensioning rails 4, 5 can be split or undivided tensioning rails.
  • the front clamping rail 4 is supported Tensioning screws 4.4 directly on the wall of cylinder channel 3.
  • the pressure plate is fixed in the front tensioning rail 4 in a known manner in a zero position, for example by means of dowel bolts.
  • the rear tensioning rail 5 is supported by tensioning screws 5.4 on a pressure bar 7 which runs and is displaceable parallel to the rear channel wall in a recess 6 machined there.
  • the pressure bar 7 has two recesses 8 one above the other with an inclined plane, which slide on wedge surfaces on counterparts 9, so that a movement of the pressure bar 7 parallel to the channel wall causes the pressure plate to be tensioned by a tensioning rail 5 displacing from the rear channel wall.
  • the tensioning device described which is to be counted in the prior art, thus represents a series connection consisting of a pre-tensioning device (pressure bar 7, recesses 8, counterparts 9) and the tensioning screws 5.4 for the final, adjusting tensioning.
  • the eccentric shafts 4.3, 5.3, as shown in FIGS. 1 to 3, have coupling sleeves 12 on both cylinder side walls 10 in openings 11 there, which advantageously terminate flat with the cylinder side walls 10.
  • the openings 11 in the cylinder side walls 10 are dimensioned such that maximum adjustability of the clamping rails 4, 5, in particular by the clamping screws 4.4, 5.4, is ensured (FIGS. 2 and 3).
  • the eccentric shafts 4.3, 5.3 are connected to the coupling sleeves 12 by way of compensating couplings 13, in particular in the Oldham design.
  • clamping tools 14 are movably inserted in the two frame walls, which, if appropriate Angular position of the plate cylinder 1 can be engaged by an axial movement into the coupling sleeves 12 of the pressure start or pressure end eccentric shaft 4.3, 5.3.
  • the end of the clamping tool 14 which engages in the coupling sleeve 12 is designed in a form-fitting manner with respect to the inner profile of the coupling sleeve 12.
  • the coupling sleeve 12 has an internal hexagon profile and the end of the clamping tool 14 an external hexagonal profile. The latter can also rejuvenate. (Fig. 2).
  • the rear part of the clamping tool 14 pointing away from the plate cylinder 1 is a piston rod 15 with a piston disk 16, which in turn is guided in a cylinder bore 16 'of the frame wall 2 (FIG. 2).
  • the cylinder bore 16 ' delimits a flange 17 attached to the frame wall 2
  • the cylinder bore 16' is delimited by a bearing part 18 attached to the frame wall 2.
  • Flange 17 guides the front part (shaft) of the clamping tool 14.
  • Bearing part 18 guides the end of the piston rod 15 in a bore.
  • the part of the clamping tool 14 which is in the frame wall 2 thus forms with the piston rod 15, piston disk 16, flange 17, bearing part 18 a double acting, ie Working cylinder that can be moved in two directions by applying pressure medium.
  • the pressure medium is fed into the two chambers of the working cylinder via bores 19 and 19 '.
  • the pressure medium is advantageously compressed air.
  • Flange 17 and bearing part 18 have corresponding seals with respect to frame wall 2 and clamping tool 14.
  • This bore and the shaft of the clamping tool 14 are in such a positive connection that the axial displaceability of the clamping tool 14 is not impaired.
  • the bore and shaft have a multi-groove profile.
  • Flange 17 rotatably guides lever 20, the free end of lever 20 is led out through a recess 17 '(FIG. 2b).
  • both compressed air cylinders 23 are installed in the machine in a predominantly vertical orientation, since most of the space is available in this way.
  • the pressure plate can be clamped or unclamped at the pressure start and pressure end by appropriate pressurization of compressed air with clamping tools 14 engaged on both sides in the coupling sleeves 14 of the pressure start, pressure end eccentric shafts 4.3, 5.3. As already mentioned, the clamping tools 14 are engaged or disengaged after the angular positioning of the plate cylinder 1.
  • a motor 25 is arranged between the front and rear clamping rails 4, 5, which drives an adjusting spindle 27 running parallel to the axis of the plate cylinder 1 via a joint 26.
  • a spindle nut 28 is seated on the adjusting spindle 27 and is firmly connected to the pressure bar 7 via a bridge 29.
  • the adjusting spindle 27 is guided as a shaft by means of an axial thrust bearing 30 through a support wall 31 and is supported at its end with a spherical end face by means of a pressure piece 32 on a further support wall 31 (FIGS. 3 and 4).
  • the spindle nut 28, that is also the pressure bar 7 is displaced parallel to the rear wall of the cylinder channel 3 via the adjusting spindle 27, which is supported on both sides. Since the adjusting spindle 27 moves parallel to the pressure bar 7, the thrust bearing 30 is embedded in a corresponding groove 31 'in the support wall 31 (FIG. 5).
  • the motor 25 is pivotably mounted at its rear end by means of a joint 25 'parallel to the bottom of the cylinder channel 3 (FIGS. 3 and 4).
  • the motor 25 is advantageously a compressed air motor, in particular a vane motor.
  • a tensioning lever 33 is assigned along the (contact surface of the pressure bar 7 to each tensioning screw 5.4 (FIGS. 3 and 6).
  • each with two tensioning screws 5.4 in total four tensioning levers 33 which are advantageously arranged in mirror image to the center of the plate cylinder 1 (FIG. 7).
  • the tensioning levers 33 are supported on the pressure bar 7 via a molded-on cam 34 with a force-intensifying lever transmission.
  • One end of each of the tension levers 33 is connected to the rear tensioning rail 5 by means of a swivel 35, i.e. the lower clamping device 5.2 connected.
  • the other free end of the tensioning lever 33 is supported on a stop pin 37 under the action of a spring 36 which is supported in a cylinder-fixed manner. This lies on the connecting line of the rotary joints 35 in the rear tensioning rail 5.
  • a gap a therefore arises between the pressure bar 7 and under the clamping device 5.2 (FIGS. 6 and 7).
  • a register correction in the circumferential direction is then carried out in a known manner via the tensioning screws 4.4, 5.4, in the axial direction by means of the adjusting screws indicated in FIG. 7, in particular in the middle of the plate cylinder 1.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

The invention relates to a device for quickly registering, fixing and tensioning printing plates on a plate cylinder (1). Arranged in the frame walls (2) are clamping tools (14) which can be inserted in coupling sleeves (12) of the eccentric shafts (4.3, 5.3) of the front and rear tensioning rails (4, 5) by means of applying a pressure medium (15, 16, 17, 18) after corresponding positioning of the plate cylinder (2). The clamping and declamping then takes place by rotating the clamping tools (14) via levers (20) and compressed air cylinders (23). A motor (25) (compressed air motor) is arranged in the cylinder gap (3) for tensioning. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum lagegenauen Schnellklemmen und Spannen von Druckplatten auf dem Plattenzylinder gemaß dem Oberbegriff des ersten Patentanspruches.The invention relates to a device for precise clamping and clamping of printing plates on the plate cylinder according to the preamble of the first claim.

Eine Vorrichtung gemäß dem Oberbegriff von Anspruch 1 ist aus der DE-PS 3 516 682 bekannt und ermöglicht in an sich bekannter Weise das Klemmen der Druckplatte am Druckanfang und Druckende durch Verdrehen der den entsprechenden Spannschienen zugehörigen Exzenterwellen mittels eines von Hand zu betätigenden Werkzeugs. Ebenso erfolgt das anschließende Spannen der Druckplatte manuell durch ein Werkzeug, in dem über eine zentrale Betätigungseinrichtung und eine Druckleiste die Spannschiene am Druckende von der hinteren Kanalwand nahezu in Umfangsrichtung verschoben wird. Nachteilig hierbei ist, daß mehrere manuelle Handhabungen am Zylinderkanal notwendig sind und ein selbsttätiges Nachspannen während des Maschinenlaufs nicht gewährleistet ist.A device according to the preamble of claim 1 is known from DE-PS 3 516 682 and enables, in a manner known per se, the clamping of the printing plate at the beginning and end of printing by rotating the eccentric shafts associated with the corresponding tensioning rails by means of a hand-operated tool. Likewise, the subsequent tensioning of the pressure plate is carried out manually using a tool in which the tensioning rail at the end of the print is displaced almost in the circumferential direction by a central actuating device and a pressure bar. The disadvantage here is that several manual manipulations on the cylinder channel are necessary and automatic re-tensioning is not guaranteed while the machine is running.

Die DE-OS 3 843 433 schildert eine Einrichtung zum Schnellaufspannen von Druckplatten, wobei die das Klemmen und Spannen bewirkenden Exzenterwellen an der Zylinderseitenwand jeweils mit doppelten Rollenhebeln versehen sind und zum Klemmen, Entklemmen, Spannen, Entspannen über eine gestellfeste Betätigungseinrichtung nach einer entsprechenden Winkelpositionierung des Plattenzylinders verdrehbar sind.DE-OS 3 843 433 describes a device for rapid clamping of printing plates, the eccentric shafts causing the clamping and clamping on the cylinder side wall each being provided with double roller levers and for clamping, unclamping, clamping, relaxing via an actuator fixed to the frame after a corresponding angular positioning of the Plate cylinders are rotatable.

Einen technisch ähnlichen Weg beschreibt ferner die EP-A2 0 260 492, wobei die Exzenterwellen an der Zylinderseitenwand anstatt doppelte einfache Hebelarme tragen und mittels Zug oder Druck über eine gestellseitige Betätigungseinrichtung verdrehbar sindEP-A2 0 260 492 also describes a technically similar route, with the eccentric shafts on the cylinder side wall instead carry double simple lever arms and can be rotated by pulling or pushing through a frame-side actuator

Nachteilig bei beiden Lösungen ist, daß das Spannen der Druckplatte nur in einer bestimmten Position des Plattenzylinders erfolgen kann, ein Nachspannen während des Maschinenlaufes, insbesondere ein Selbsttätiges nicht gewährleistet ist. Auch sind negative Auswirkungen auf den Klemm- und Spannzustand durch die mit rotierenden, ferner auch Platz benötigenden Doppel- bzw. Einfachhebel, insbesondere durch die Stöße beim gegeneinander Ein- und Ausrollen des Platten- und Gummizylinderkanals.A disadvantage of both solutions is that the tensioning of the printing plate can only take place in a certain position of the plate cylinder, re-tensioning during machine operation, in particular automatic operation, is not guaranteed. There are also negative effects on the clamping and tensioning state due to the double or single lever, which also rotates and also requires space, in particular due to the impacts when the plate and rubber cylinder channels roll in and out against one another.

Eine weitere Einrichtung zum lagegenauen Schnellaufspannen zeigt die DE-OS 3 843 395. Demnach ist der Klemm- und Spanneinrichtung mindestens eine am Maschinengestell angeordnete gemeinsame, zum Zeitpunkt des Klemmens und Spannens mit der Winkellage des Plattenzylinders korrespondierende Betätigungseinrichtung zugeordnet. Klemmen und Spannen erfolgt über axial verschiebbare Ziehkeilgetriebe, die von den beidseitig der Zylinderseitenwände angeordneten Betätigungseinrichtungen bewegbar sind. Auch hier ist kein Spannen während des Maschinenlaufes möglich. Ebenso nachteilig ist, daß die Kräfte zum Klemmen, Entklemmen, Spannen und Entspannen stets axial wirken und so von den Lagern des Plattenzylinders aufgenommen werden müssen.DE-OS 3 843 395 shows a further device for precise rapid clamping. Accordingly, the clamping and clamping device is assigned at least one common actuating device arranged on the machine frame and corresponding to the angular position of the plate cylinder at the time of clamping and clamping. Clamping and tensioning takes place via axially displaceable pull wedge gears, which can be moved by the actuating devices arranged on both sides of the cylinder side walls. Here too, clamping is not possible while the machine is running. Another disadvantage is that the forces for clamping, unclamping, tensioning and relaxing always act axially and must therefore be absorbed by the bearings of the plate cylinder.

Aufgabe der Erfindung ist es, die Eingangs spezifierte Vorrichtung so zu erweitern, daß ein Klemmen und Spannen der Druckplatte mit einem Minimum an Handhabungsaufwand exakt lagegenau durchfürbar ist, ein Regulieren der Spannung von Druckplatten und deren selbsttätiges Nachspannen gleichmäßig über die ganze Breite ermöglicht wird, insbesondere bei großformatigen Druckplatten und ferner die im Stand der Technik angesprochenen konstruktiven Nachteile vermieden werden können.The object of the invention is to expand the input-specified device so that a clamping and tensioning of the printing plate can be carried out precisely with a minimum of handling effort, regulating the tension of printing plates and their automatic re-tensioning is made possible uniformly over the entire width, in particular in the case of large-format printing plates and also the design disadvantages mentioned in the prior art can be avoided.

Gelöst wird diese Aufgabe durch eine Vorrichtung entsprechend dem kennzeichenden Teil des ersten Patentanspruches. Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.This object is achieved by a device according to the characterizing part of the first claim. Training the invention result from the subclaims.

Die Erfindung wird nachstehend an einem Ausführungsbeispiel näher erläutert. In der zugehörigen Zeichnung zeigt:

Fig. 1
einen Plattenzylinder nebst gestellfester Klemmvorrichtung nach der Erfindung,
Fig. 2a und 2b
die Klemmvorrichtung einer Gestellseite im Detail,
Fig. 3
eine Ansicht auf den Plattenzylinder mit dem Antrieb der Spannvorrichtung,
Fig. 4
einen Längsschnitt durch die Mitte des Zylinderkanals,
Fig. 5
den Schnitt A-B nach Fig. 3, vereinfacht,
Fig. 6
eine Einzelheit der Plattenspannvorrichtung,
Fig. 7
die Gesamtansicht der hinteren Spannschiene.
The invention is explained in more detail below using an exemplary embodiment. In the accompanying drawing:
Fig. 1
a plate cylinder and frame-fixed clamping device according to the invention,
2a and 2b
the clamping device of a frame side in detail,
Fig. 3
a view of the plate cylinder with the drive of the clamping device,
Fig. 4
a longitudinal section through the middle of the cylinder channel,
Fig. 5
the section AB of FIG. 3, simplified,
Fig. 6
a detail of the plate clamping device,
Fig. 7
the overall view of the rear clamping rail.

Der Plattenzylinder 1 wird beidseitig von Gestellwänden 2 der Druckmaschine in nicht dargestellten Lagern getragen. Er weist in seinem Zylinderkanal 3 Mittel zum Klemmen und Spannen von Druckplatten auf. Diese Mittel sind gemäß Fig. 1, 3 und 5 als eine dem Druckanfang und dem Druckende zugeordnete vordere und hintere Spannschiene 4, 5 ausgebildet, jeweils bestehend aus einer oberen Klemmeinrichtung 4.1, 5.1, einer unteren Klemmeinrichtung 4.2, 5.2 und betätigbar durch Exzenterwellen 4.3, 5.3. Bei diesen Spannschienen 4, 5 kann es sich dabei um geteilte oder ungeteilte Spannschienen handeln. Die vordere Spannschiene 4 stützt sich über Spannschrauben 4.4 direkt an der Wand des Zylinderkanals 3 ab. Die Druckplatte ist in der vorderen Spannschiene 4 in bekannter Weise in einer Nullage fixiert, beispielsweise mittels Paßbolzen.The plate cylinder 1 is supported on both sides by frame walls 2 of the printing press in bearings, not shown. In its cylinder channel it has 3 means for clamping and tensioning printing plates. 1, 3 and 5, these means are designed as a front and rear tensioning rail 4, 5 assigned to the beginning and the end of printing, each consisting of an upper clamping device 4.1, 5.1, a lower clamping device 4.2, 5.2 and actuatable by eccentric shafts 4.3, 5.3. These tensioning rails 4, 5 can be split or undivided tensioning rails. The front clamping rail 4 is supported Tensioning screws 4.4 directly on the wall of cylinder channel 3. The pressure plate is fixed in the front tensioning rail 4 in a known manner in a zero position, for example by means of dowel bolts.

Die hintere Spannschiene 5 stützt sich über Spannschrauben 5.4 auf einer parallel zur hinteren Kanalwand in einer dort eingearbeiteten Aussparung 6 verlaufenden und verschiebbaren Druckleiste 7 ab.The rear tensioning rail 5 is supported by tensioning screws 5.4 on a pressure bar 7 which runs and is displaceable parallel to the rear channel wall in a recess 6 machined there.

Die Druckleiste 7 weist übereinanderliegend zwei Aussparungen 8 mit einer schiefen Ebene auf, die auf Keilflächen an Gegenstücken 9 gleiten, so daß eine parallel zur Kanalwand erfolgende Bewegung der Druckleiste 7 ein Spannen der Druckplatte durch eine sich von der hinteren Kanalwand verschiebende Spannschiene 5 bewirkt. Die beschriebene, zum Stand der Technik zu zählende Spanneinrichtung stellt somit eine Reihenschaltung dar, bestehend aus einer Vorspanneinrichtung (Druckleiste 7, Aussparungen 8, Gegenstücke 9) und den Spannschrauben 5.4 zum endgültigen, justierenden Spannen.The pressure bar 7 has two recesses 8 one above the other with an inclined plane, which slide on wedge surfaces on counterparts 9, so that a movement of the pressure bar 7 parallel to the channel wall causes the pressure plate to be tensioned by a tensioning rail 5 displacing from the rear channel wall. The tensioning device described, which is to be counted in the prior art, thus represents a series connection consisting of a pre-tensioning device (pressure bar 7, recesses 8, counterparts 9) and the tensioning screws 5.4 for the final, adjusting tensioning.

Die Exzenterwellen 4.3, 5.3 weisen, wie in Fig. 1 bis 3 dargestellt an beiden Zylinderseitenwänden 10 in dortigen Öffnungen 11 Kupplungsmuffen 12 auf, die vorteilhafter Weise plan mit den Zylinderseitenwänden 10 abschließen. Die Öffnungen 11 in den Zylinderseitenwänden 10 sind dabei so bemessen, daß maximale Verstellbarkeit der Spannschienen 4, 5, insbesondere durch die Spannschrauben 4.4, 5.4 gewährleistet ist (Fig. 2 und 3).The eccentric shafts 4.3, 5.3, as shown in FIGS. 1 to 3, have coupling sleeves 12 on both cylinder side walls 10 in openings 11 there, which advantageously terminate flat with the cylinder side walls 10. The openings 11 in the cylinder side walls 10 are dimensioned such that maximum adjustability of the clamping rails 4, 5, in particular by the clamping screws 4.4, 5.4, is ensured (FIGS. 2 and 3).

Damit die axiale Verstellbarkeit der Spannschienen 4, 5 mittels nicht dargestellter Stellschrauben nicht gleichzeitig ein axiales Verschieben der Kupplungsmuffen 12 bewirkt, sind die Exzenterwellen 4.3, 5.3 über Ausgleichskupplungen 13, insbesondere in Oldham-Bauweise mit den Kupplungsmuffen 12 verbunden.So that the axial adjustability of the clamping rails 4, 5 does not simultaneously cause the coupling sleeves 12 to be axially displaced by means of adjusting screws (not shown), the eccentric shafts 4.3, 5.3 are connected to the coupling sleeves 12 by way of compensating couplings 13, in particular in the Oldham design.

In gleichem Abstand, den die Exzenterwellen 4.3, 5.3 bzw. die mit ihnen verbundenen Kupplungsmuffen 12 zur Achse des Plattenzylinders 1 aufweisen, sind von dieser in beiden Gestellwänden 2 Klemmwerkzeuge 14 beweglich eingelassen, die bei entsprechender Winkelstellung des Plattenzylinders 1 durch eine axiale Bewegung in die Kupplungsmuffen 12 der Druckanfang- bzw. Druckende-Exzenterwelle 4.3, 5.3 einrückbar sind. Das in die Kupplungsmuffe 12 einrückende Ende des Klemmwerkzeuges 14 ist dabei formschlüssig zum Innenprofil der Kupplungsmuffe 12 ausgestaltet. Insbesondere weist die Kupplungsmuffe 12 ein Innensechskant-, das Ende des Klemmwerkzeuges 14 ein Außensechskantprofil auf. Letzteres kann sich zusätzlich noch verjüngen. (Fig. 2).At the same distance from the eccentric shafts 4.3, 5.3 or the coupling sleeves 12 connected to them from the axis of the plate cylinder 1, 2 clamping tools 14 are movably inserted in the two frame walls, which, if appropriate Angular position of the plate cylinder 1 can be engaged by an axial movement into the coupling sleeves 12 of the pressure start or pressure end eccentric shaft 4.3, 5.3. The end of the clamping tool 14 which engages in the coupling sleeve 12 is designed in a form-fitting manner with respect to the inner profile of the coupling sleeve 12. In particular, the coupling sleeve 12 has an internal hexagon profile and the end of the clamping tool 14 an external hexagonal profile. The latter can also rejuvenate. (Fig. 2).

Der vom Plattenzylinder 1 wegweisende, hintere Teil des Klemmwerkzeuges 14 ist ein Kolbenstange 15 mit einer Kolbenscheibe 16 ausgebildet, die ihrerseits in einer Zylinderbohrung 16' der Gestellwand 2 geführt ist (Fig. 2). Auf der Maschineninnenseite begrenzt die Zylinderbohrung 16' jeweils ein an der Gestellwand 2 angebrachtes Flansch 17, auf der Maschinenaußenseite wird die Zylinderbohrung 16' durch ein an der Gestellwand 2 angebrachtes Lagerteil 18 begrenzt. Flansch 17 führt den vorderen Teil (Schaft) des Klemmwerkzeuges 14. Lagerteil 18 führt in einer Bohrung das Ende der Kolbenstange 15. Der jeweils in der Gestellwand 2 liegende Teil von Klemmwerkzeug 14 bildet so mit Kolbenstange 15, Kolbenscheibe 16, Flansch 17, Lagerteil 18 einen doppeltwirkenden, d.h. in 2 Richtungen durch Druckmittelbeaufschlagung bewegbaren Arbeitszylinder. Die Druckmittelzufuhr in die beiden Kammern des Arbeitszylinders erfolgt dabei über Bohrungen 19 bzw. 19'. Bei den Druckmittel handelt es sich dabei vorteilhafter Weise um Druckluft. Flansch 17 und Lagerteil 18 weisen gegenüber Gestellwand 2 und Klemmwerkzeug 14 entsprechende Dichtungen auf.The rear part of the clamping tool 14 pointing away from the plate cylinder 1 is a piston rod 15 with a piston disk 16, which in turn is guided in a cylinder bore 16 'of the frame wall 2 (FIG. 2). On the inside of the machine, the cylinder bore 16 'delimits a flange 17 attached to the frame wall 2, on the outside of the machine the cylinder bore 16' is delimited by a bearing part 18 attached to the frame wall 2. Flange 17 guides the front part (shaft) of the clamping tool 14. Bearing part 18 guides the end of the piston rod 15 in a bore. The part of the clamping tool 14 which is in the frame wall 2 thus forms with the piston rod 15, piston disk 16, flange 17, bearing part 18 a double acting, ie Working cylinder that can be moved in two directions by applying pressure medium. The pressure medium is fed into the two chambers of the working cylinder via bores 19 and 19 '. The pressure medium is advantageously compressed air. Flange 17 and bearing part 18 have corresponding seals with respect to frame wall 2 and clamping tool 14.

Der vordere, als Schaft ausgeführte Teil des Klemmwerkzeuges 14 ist im Flansch 17 zusätzlich durch eine Bohrung eines Hebels 20 geführt. Diese Bohrung und der Schaft des Klemmwerkzeuges 14 sind dabei in derartiger formschlüssiger Verbindung, daß die axiale Verschiebbarkeit des Klemmwerkzeuges 14 nicht beeinträchtigt wird. Insbesondere weisen Bohrung und Schaft ein Vielnutprofil auf. Flansch 17 führt dabei den Hebel 20 drehbar, das freie Ende von Hebel 20 ist durch eine Ausnehmung 17' herausgeführt (Fig. 2b).The front part of the clamping tool 14, designed as a shaft, is additionally guided in the flange 17 through a bore in a lever 20. This bore and the shaft of the clamping tool 14 are in such a positive connection that the axial displaceability of the clamping tool 14 is not impaired. In particular, the bore and shaft have a multi-groove profile. Flange 17 rotatably guides lever 20, the free end of lever 20 is led out through a recess 17 '(FIG. 2b).

Das aus Flansch 17 herausgeführte Ende von Hebel 20 ist über ein Gelenk 21 mit einer Kolbenstange 22 eines ebenfalls doppeltwirkenden Druckluftzylinders 23, der an seinem Boden mit einem Schwenkauge über eine Brücke 24 fest mit der Gestellwand 2 verbunden ist (Fig. 1 und Fig. 2b). Vorteilhafterweise sind beide Druckluftzylinder 23 in überwiegend vertikaler Orientierung in der Maschine eingebaut, da so am meisten Raum zur Verfügung steht. Durch entsprechende Druckluftbeaufschlagung bei beiderseits in die Kupplungsmuffen 14 der Druckanfang-, Druckende-Exzenterwellen 4.3, 5.3 eingerückten Klemmwerkzeugen 14, kann so die Druckplatte am Druckanfang und Druckende ge- bzw. entklemmt werden. Das Ein- bzw. Ausrücken der Klemmwerkzeuge 14 erfolgt dabei wie bereits erwähnt, nach entsprechender Winkelpositionierung von Plattenzylinder 1.The end of lever 20 which is led out of flange 17 is connected via a joint 21 to a piston rod 22 of a likewise double-acting compressed air cylinder 23, which is firmly connected to the frame wall 2 at its bottom by means of a pivoting eye via a bridge 24 (FIGS. 1 and 2b ). Advantageously, both compressed air cylinders 23 are installed in the machine in a predominantly vertical orientation, since most of the space is available in this way. The pressure plate can be clamped or unclamped at the pressure start and pressure end by appropriate pressurization of compressed air with clamping tools 14 engaged on both sides in the coupling sleeves 14 of the pressure start, pressure end eccentric shafts 4.3, 5.3. As already mentioned, the clamping tools 14 are engaged or disengaged after the angular positioning of the plate cylinder 1.

Im Zylinderkanal 3 des Plattenzylinders 1 ist zwischen vorderer und hinterer Spannschiene 4, 5 ein Motor 25 angeordnet, der über ein Gelenk 26 eine parallel zur Achse des Plattenzylinders 1 verlaufende Stellspindel 27 eintreibt. Auf der Stellspindel 27 sitzt eine Spindelmutter 28, die über eine Brücke 29 fest mit der Druckleiste 7 verbunden ist. Die Stellspindel 27 ist als Welle mittels eines Axialdrucklagers 30 durch eine Stützwand 31 geführt und stützt sich an ihrem Ende mit balliger Stirnseite über ein Druckstück 32 an einer weiteren Stützwand 31 zylinderfest ab (Fig. 3 und 4). Je nach Drehrichtung von Motor 25 wird so über die sich beidseitig abstützende Stellspindel 27, die Spindelmutter 28, also auch die Druckleiste 7 parallel zur hinteren Wand des Zylinderkanals 3 verschoben. Da sich Stellspindel 27 parallel zur Druckleiste 7 bewegt, ist das Axialdrucklager 30 in einer entsprechend Nut 31' der Stützwand 31 eingelassen (Fig. 5). Um der Bewegung der Stellspindel 27 folgen zu können, ist Motor 25 an seinem hinteren Ende vermittels eines Gelenkes 25' parallel zum Boden des Zylinderkanals 3 verschwenkbar gelagert (Fig. 3 und 4). Beim Motor 25 handelt es sich dabei vorteilhafter Weise um einen Druckluftmotor, insbesondere einen Lamellenmotor. Durch entsprechende Druckluftbeaufschlagung des Motors 25 ist in einfacher Weise ein Überdehen, Reißen mit der Druckplatte beim Spannen vermeidbar. Die Druckluftzufuhr zum Betrieb des Motors 25 in beide Drehrichtungen erfolgt dabei in nicht dargestellter Weise mittels eines Drehübertragers über einen Zapfen des Plattenzylinders 1 und der sie lagernden Gestellwand 2.In the cylinder channel 3 of the plate cylinder 1, a motor 25 is arranged between the front and rear clamping rails 4, 5, which drives an adjusting spindle 27 running parallel to the axis of the plate cylinder 1 via a joint 26. A spindle nut 28 is seated on the adjusting spindle 27 and is firmly connected to the pressure bar 7 via a bridge 29. The adjusting spindle 27 is guided as a shaft by means of an axial thrust bearing 30 through a support wall 31 and is supported at its end with a spherical end face by means of a pressure piece 32 on a further support wall 31 (FIGS. 3 and 4). Depending on the direction of rotation of the motor 25, the spindle nut 28, that is also the pressure bar 7, is displaced parallel to the rear wall of the cylinder channel 3 via the adjusting spindle 27, which is supported on both sides. Since the adjusting spindle 27 moves parallel to the pressure bar 7, the thrust bearing 30 is embedded in a corresponding groove 31 'in the support wall 31 (FIG. 5). In order to be able to follow the movement of the adjusting spindle 27, the motor 25 is pivotably mounted at its rear end by means of a joint 25 'parallel to the bottom of the cylinder channel 3 (FIGS. 3 and 4). The motor 25 is advantageously a compressed air motor, in particular a vane motor. Appropriate compressed air supply to the motor 25 makes it easy to overhang, tear with the pressure plate when Tension avoidable. The compressed air supply for operating the motor 25 in both directions of rotation takes place in a manner not shown by means of a rotary transmitter via a pin of the plate cylinder 1 and the frame wall 2 supporting it.

Unterhalb der insbesondere geteilten hinteren Spannschiene 5, also unterhalb der unteren Klemmeinrichtung 5.2 ist längs der (Auflagefläche der Druckleiste 7 jeder Spannschraube 5.4 ein Spannhebel 33 zugeordnet (Fig. 3 und 6). Bei einer insbesondere geteilten hinteren Spannschiene mit je zwei Spannschrauben 5.4 insgesamt also vier Spannhebel 33, die vorteilhafter Weise spiegelbildlich zur Mitte des Plattenzylinders 1 angeordnet sind (Fig. 7).Below the particularly split rear tensioning rail 5, that is, below the lower clamping device 5.2, a tensioning lever 33 is assigned along the (contact surface of the pressure bar 7 to each tensioning screw 5.4 (FIGS. 3 and 6). In the case of a particularly divided rear tensioning rail, each with two tensioning screws 5.4 in total four tensioning levers 33, which are advantageously arranged in mirror image to the center of the plate cylinder 1 (FIG. 7).

Die Spannhebel 33 sind über einen angeformten Nocken 34 bei kraftverstärkender Hebelübersetzung auf der Druckleiste 7 abgestützt. Ein Ende jedes der Spannhebel 33 ist mittels eines Drehgelenkes 35 mit der hinteren Spannschiene 5, d.h. der unteren Klemmeinrichtung 5.2 verbunden. Das andere freie Ende des Spannhebels 33 ist unter Wirkung einer zylinderfest abgestützten Feder 36 auf einem Anschlagbolzen 37 abgestützt. Dieser liegt auf der Verbindungslinle der Drehgelenke 35 in der hinteren Spannschiene 5. Zwischen Druckleiste 7 und unter Klemmeinrichtung 5.2 entsteht daher ein Spalt a (Fig. 6 und 7).The tensioning levers 33 are supported on the pressure bar 7 via a molded-on cam 34 with a force-intensifying lever transmission. One end of each of the tension levers 33 is connected to the rear tensioning rail 5 by means of a swivel 35, i.e. the lower clamping device 5.2 connected. The other free end of the tensioning lever 33 is supported on a stop pin 37 under the action of a spring 36 which is supported in a cylinder-fixed manner. This lies on the connecting line of the rotary joints 35 in the rear tensioning rail 5. A gap a therefore arises between the pressure bar 7 and under the clamping device 5.2 (FIGS. 6 and 7).

Wird nun über Motor 25 und Stellspindel 27 die Druckleiste 7 in Richtung Druckende-Spannen verschoben, so wird die hintere Spannschiene 5 zunächst über die Nocken 34 der Spannhebel 33 vorgedrückt. In Umfangsrichtung werden in Folge einer Regulierung der Spannung der Federn 36 gleichmäßige Zugkräfte über die Spannschiene 5 auf die geklemmte Druckplatte ausgeübt.If the pressure bar 7 is now moved in the direction of the end-of-clamping clamping via the motor 25 and adjusting spindle 27, the rear clamping rail 5 is first pressed forward via the cams 34 of the clamping lever 33. In the circumferential direction, as a result of a regulation of the tension of the springs 36, uniform tensile forces are exerted on the clamped pressure plate via the tensioning rail 5.

Bei Überschreiten einer bestimmten Spannkraft, abhängig von Vorspannung und Kennung der Federn 36 nebst Hebelübersetzung der Spannhebel 33 schwenken die freien Enden der Spannhebel 33 vom Anschlagbolzen 37 ab. Die auf die Druckplatte ausgeübte Spannkraft ist so begrenzbar, ferner ist ein selbsttätiges Nachspannen im Sinne eines erhalten der Zugkraft gegeben.When a certain clamping force is exceeded, depending on the preload and the identification of the springs 36 and the lever ratio of the clamping levers 33, the free ends of the clamping levers 33 pivot from the stop pin 37. The clamping force exerted on the pressure plate can thus be limited, and there is also an automatic re-tensioning in the Given a sense of traction.

Eine Passerkorrektur in Umfangsrichtung erfolgt anschließend in bekannter Weise über die Spannschrauben 4.4, 5.4, in axialer Richtung vermittels in Fig. 7 angedeuteten Stellschrauben insbesondere in der Mitte vom Plattenzylinder 1.A register correction in the circumferential direction is then carried out in a known manner via the tensioning screws 4.4, 5.4, in the axial direction by means of the adjusting screws indicated in FIG. 7, in particular in the middle of the plate cylinder 1.

BezugszeichenlisteReference list

11
PlattenzylinderPlate cylinder
22nd
GestellwandRack wall
33rd
ZylinderkanalCylinder channel
44th
ordere Spannschieneorder tensioning rail
4.14.1
obere Klemmeinrichtungupper clamping device
4.24.2
untere Klemmeinrichtunglower clamping device
4.34.3
ExzenterwelleEccentric shaft
4.44.4
SpannschruabeSpannschruabe
55
hintere Spannschienerear tensioning rail
5.15.1
obere Klemmeinrichtungupper clamping device
5.25.2
untere Klemmeinrichtunglower clamping device
5.35.3
ExzenterwelleEccentric shaft
5.45.4
SpannschraubeClamping screw
66
Aussparung (Zylinder)Recess (cylinder)
77
DruckleistePressure bar
88th
Aussparung (Druckleiste)Recess (pressure bar)
99
GegenstückCounterpart
1010th
ZylinderseitenwandCylinder side wall
1111
Öffnungopening
1212th
KupplungsmuffeCoupling sleeve
1313
AusgleichskupplungCompensating coupling
1414
KlemmwerkzeugClamping tool
1515
KolbenstangePiston rod
1616
KolbenscheibePiston disc
16'16 '
ZylinderbohrungCylinder bore
1717th
Flanschflange
17'17 '
AusnehmungRecess
1818th
LagerteilBearing part
1919th
Bohrungdrilling
2020th
Hebellever
2121
Gelenkjoint
2222
KolbenstangePiston rod
2323
DruckluftzylinderAir cylinder
2424th
Brückebridge
2525th
Motorengine
2626
Gelenkjoint
2727
StellspindelAdjusting spindle
2828
SpindelmutterSpindle nut
2929
Brückebridge
3030th
AxialdrucklagerThrust bearing
3131
StützwandRetaining wall
31'31 '
NutGroove
3232
DruckstückPressure piece
3333
SpannhebelTension lever
3434
Nockencam
3535
DrehgelenkSwivel
3636
Federfeather
3737
AnschlagbolzenStop bolts
3838
KanalabdeckungDuct cover
DATHERE
DruckanfangStart of printing
DEDE
DruckendeEnd of printing

Claims (6)

  1. Device for position exact rapid clamping and tensioning of printing plates on the plate cylinder of printing presses with a front tensioning rail arranged for print start and actuatable via an eccentric shaft and consisting of an upper and lower clamping device, which is supported via tensioning bolts against the front wall of the cylinder channel, and a tensioning rail arranged for the print end likewise consisting of upper and lower clamping devices and actuatable via an eccentric shaft, which is supported via tensioning bolts on a pressure bar running parallel to the rear channel wall, and furthermore recesses are provided on the pressure bar with an inclined plane, the corresponding wedge surfaces of which are arranged relative to a counterpiece and the pressure bar is displaceable by means of a central actuation unit in the direction of the cylinder channel, whereby the pressure bar as well as the rear tensioning rail is moved in the peripheral direction in order to achieve rapid tensioning of the printing plate, characterised in that the eccentric shafts (4.3,5.3) of the front and rear tensioning rails (4,5) have at their ends coupling sleeves (12) which are led out at both side walls (10) of the plate cylinder (1) through openings (11), that in both of the frame walls (2) carrying the plate cylinder (1) at the same distance as the eccentric shafts (4.3,5.3) relative to the axis of the plate cylinder (1) for each a clamping tool (14) with an end formed for positive connection to the coupling sleeve (14) is arranged, which is constructed in the frame walls (2) as a double acting working cylinder (15,16,16',17,18), whereby the clamping tool (14) by means of subjecting to pressure medium at a corresponding angular position of the plate cylinder (1) can be extended into the coupling sleeves (12) of the eccentric shafts (4.3,5.3), that both clamping tools (14) in each case at the side of the frame wall (2) lying towards the plate cylinder (1) are guided rotationally securely and axially movably through a bore of a lever (20), the swivellable end of which is connected with the piston rod (22) of a double acting pressure cylinder (23) which is supported itself on its floor via a swivel pivot and a bridge (24), that in the cylinder channel (3), a motor is swivellably installed which drives an adjusting spindle (27) arranged in the axial direction between the front and rear tensioning rails (4,5), on which a spindle nut is movable which is connected via a bridge (29) firmly with the pressure bar (7) and the adjustment spindle (27) on one side with a ball-shaped end face is supported fast cylindrically via a pressure piece (32) and on the other side displaceably via an axial pressure bearing (30), that below the rear tensioning rail (5) along the pressure bar (7) a tensioning lever (33) is arranged relative to each tensioning bolt (5.4), wherein the tensioning lever (33) is supported via a bead (34) formed on it under force increasing lever ratio on the pressure bar (7), one end of the tensioning lever (33) is connected with the rear tensioning rail (5) swivellably by means of a swivelling link (35), the free end of the tensioning lever (33) is supported under the action of a cylinder fast supported spring (36) on a stop bolt (37) which is fixed on the connection line of the rotary link (35) in the rear tensioning bar (5).
  2. Device according to Claim 1, characterised in that the clamping tool (14) is guided in its prolongation as a piston rod (15) with a piston disc (16), the piston disc (16) is seated slidably in a cylindrical bore (16') in the frame wall (2) and a flange (17) fast to the frame guides outwardly clamping tool (14) on the one side and a trame fixed bearing part (18) guides the end of the piston rod
  3. Device according to Claim 2 characterised in that flange (17) guides lever (20) axially, and the end of lever (20) is lcd out via an aperture in flange (17).
  4. Device according to Claim 1, 2 or 3 characterised in that the coupling sleeves (12) are connected via compensating couplings (15), particularly Oldham couplings, with the eccentric shafts 4.3, 5.3).
  5. Device according to one of the preceding Claims characterised in that the double-acting working cylinder (15, 16, 16', 17, 18, 19, 19') is actuable by being subjected to compressed air.
  6. Device according to one of the preceding Claims characterised in that motor (25) is constructed as a compressed air motor, particularly of plate construction.
EP90120084A 1989-11-02 1990-10-19 Device for quickly registering, fixing and tensioning printing plates Expired - Lifetime EP0425936B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90120084T ATE99601T1 (en) 1989-11-02 1990-10-19 DEVICE FOR ACCURATE QUICK CLAMPING AND CLAMPING OF PRINTING PLATES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3936458A DE3936458C1 (en) 1989-11-02 1989-11-02
DE3936458 1989-11-02

Publications (3)

Publication Number Publication Date
EP0425936A2 EP0425936A2 (en) 1991-05-08
EP0425936A3 EP0425936A3 (en) 1991-08-28
EP0425936B1 true EP0425936B1 (en) 1994-01-05

Family

ID=6392712

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120084A Expired - Lifetime EP0425936B1 (en) 1989-11-02 1990-10-19 Device for quickly registering, fixing and tensioning printing plates

Country Status (5)

Country Link
US (1) US5076166A (en)
EP (1) EP0425936B1 (en)
JP (1) JPH0745242B2 (en)
AT (1) ATE99601T1 (en)
DE (2) DE3936458C1 (en)

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DE19961866A1 (en) * 1999-12-22 2001-06-28 Roland Man Druckmasch Device for supplying a printing medium to a cylinder carrying a printing form or a blanket
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Also Published As

Publication number Publication date
EP0425936A2 (en) 1991-05-08
EP0425936A3 (en) 1991-08-28
JPH03161336A (en) 1991-07-11
DE59004123D1 (en) 1994-02-17
DE3936458C1 (en) 1991-04-11
JPH0745242B2 (en) 1995-05-17
ATE99601T1 (en) 1994-01-15
US5076166A (en) 1991-12-31

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