EP1101612B1 - Method and device for automatic mounting a printing plate to a plate cylinder of a rotary press - Google Patents

Method and device for automatic mounting a printing plate to a plate cylinder of a rotary press Download PDF

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Publication number
EP1101612B1
EP1101612B1 EP00123303A EP00123303A EP1101612B1 EP 1101612 B1 EP1101612 B1 EP 1101612B1 EP 00123303 A EP00123303 A EP 00123303A EP 00123303 A EP00123303 A EP 00123303A EP 1101612 B1 EP1101612 B1 EP 1101612B1
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EP
European Patent Office
Prior art keywords
plate
cylinder
printing plate
grippers
printing
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
EP00123303A
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German (de)
French (fr)
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EP1101612A3 (en
EP1101612A2 (en
Inventor
Bertrum Scott Ramsay
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Goss International Americas LLC
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Goss International Americas LLC
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Publication date
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Publication of EP1101612A2 publication Critical patent/EP1101612A2/en
Publication of EP1101612A3 publication Critical patent/EP1101612A3/en
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Publication of EP1101612B1 publication Critical patent/EP1101612B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1206—Feeding to or removing from the forme cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/60—Devices for transferring printing plates

Definitions

  • the present invention relates to a method and an apparatus for automatic Applying a printing plate to a plate cylinder in a rotary printing press according to the preamble of claims 1 and 12.
  • Document US-A-5 595 119 is considered the closest prior art.
  • the US-A-5 595 119 describes a method of an automatic device Printing plate change in a rotary printing machine, with a new printing plate 80U is stored in a swiveling cassette 30U.
  • the cassette 30U will pivoted such that its lower end is positioned in the vicinity of a pressure roller 28U which is located opposite the surface of a plate cylinder 13U.
  • a pneumatic cylinder 61U is activated, so that a gripper 60, which the the rear end of the plate 80U holds along the cassette toward the platen roller 28U is moved. This movement stops as soon as a leading edge 81U reaches a position reached at the pressure roller 28U.
  • the pressure roller 28U presses the front edge 81U in a clamping gap of the plate cylinder 13U.
  • the Press roller 28U becomes the cleat nip for holding the plate leading edge 81U closed.
  • document WO-A-95/19262 discloses a device for assembly, Disassembly and transport of printing plates on and from a cylinder Rotary printing press.
  • a plate-mounted, plate-fixed printing plate supply device provided with at least one pre-positioned pressure plate, and a traverse with at least one gripping and pressing device, which in one Transport plane is positioned by means of a linear drive, the Transport plane approximately parallel and above to one of a cylinder surface of the cylinder and mounting rail of the printing plate preparation device Tangent lies.
  • No. 5,390,603 discloses a method for automatically changing printing plates described a plate cylinder of a printing press.
  • the plate cylinder includes one Fastening or clamping device for the front edge and the rear edge of one Printing plate.
  • the plate cylinders are placed in a Change position moves in the trailing edge and the leading edge of the printing plates be released. Then the plate cylinders are placed in the opposite Direction turned to unroll the pressure plate. Then each plate cylinder a new pressure plate is fed by means of suction arms, the suction arms feeding the pressure plate in such a way that the leading edge of the new plate is attached to the leading edge fastening device can be attached.
  • US 5,495,805 and US 5,443,006 describe feed and discharge devices from printing plates to or from a plate cylinder. That in these patents described magazine comprises two holding shafts, inserted into the cassettes from above can be. One of the cassettes is for holding the used printing plates originally empty, while in another cassette the on the plate cylinder new printing plates to be applied are included. A plate feeder removes the plates from the cassette containing the new plates. A Plate path guiding device removes the plates from the plate cylinder and places them in the Cassette for the old records.
  • the plate path guide includes suction elements that on a by means of a first drive device along a first guide movable first carriage are arranged.
  • the Trailing edge clamping device opened so that the elasticity of the pressure plate Impacts the rear edge against a guide roller.
  • the plate cylinder will then turned backwards so that the plate is inserted into the magazine. in the Magazine, the suction elements are activated.
  • the old printing plate Suction elements of the first carriage moved to an upper position during the Plate cylinder continues to be rotated backwards.
  • the old plate is then placed in the Cassette for old printing plates inserted.
  • the includes Plate feed mechanism a second carriage with suction elements.
  • the leading edge of the new printing plate is moved to the leading edge clamping device of the plate cylinder.
  • the plate is aligned and clamped.
  • the plate cylinder rotated forward so that the pressure plate is around the outer surface of the plate cylinder is placed.
  • the pressure plate can be reduced by reducing the suction power of the suction elements continue to be held by the suction elements, while due to the rotation of the Plate cylinder slides over this.
  • the rear edge of the pressure plate passes the last two suction elements, they are deactivated and the rear edge of the Pressure plate radially into the trailing edge clamping device by means of a pressure roller pressed. Then the rear edge is clamped and the plate is stretched.
  • U 5,701,822 there is a plate changing device for an offset printing machine described.
  • the plate cylinder comprises an automatic clamping device in one Gap or channel of the plate cylinder.
  • a holding element is provided to support the positioning of the Pressure plate on the plate cylinder.
  • the one to apply Printing plate is held by a printing plate loading unit.
  • the holding element detects the plate to be inserted and positions the front edge on the plate cylinder.
  • the printing form can then by the Circumferential surface of the plate cylinder can be clamped.
  • a disadvantage of the devices and methods described is that the The front edge of the plate cylinder can slip, so that it does not slide before insertion is aligned more along the cylinder channel. This can cause the malfunction automatic plate changing device. Especially with plate cylinders The methods and devices described frequently lead to a very small cylinder gap malfunction or cannot be used at all.
  • US 5,553,544 and US 5,284,093 describe plate cylinders with a narrow one Cylinder gap in which both the front edge and the rear edge of the pressure plate be inserted so that there is only a small space between them.
  • US 5,678,487 is also a plate cylinder with a narrow cylinder gap and one Trailing edge insertion device described.
  • An object of the present invention is to provide an improved method and an improved device for the automatic application of printing plates on a To create plate cylinders in a rotary printing press.
  • the method according to the invention for automatically applying a printing plate a plate cylinder provides a first edge against a printing plate a cylinder adjoining the plate cylinder and thereby aligned the first edge of the printing plate into a gap or channel in the plate cylinder is inserted and the printing plate is then placed around the plate cylinder becomes.
  • the inventive method is a better alignment of the plate before Inserted into the cylinder gap or channel reached. This allows the front edge of the Plate inserted reliably and correctly aligned in the cylinder gap or channel be, which means even with plate cylinders with a very narrow gap reliable application of the plate is made possible.
  • the method according to the invention comprises fastening the first edge in the cylinder gap.
  • the plate cylinder is then preferably rotated, so that the plate is placed around the plate cylinder.
  • An insertion device can then be used to insert the trailing edge of the plate into the gap support.
  • the adjacent cylinder is preferably one by a blanket cylinder Offset printing press formed. This offers a large adjacent area on which the Plate can be aligned.
  • the inventive device for applying a printing plate on a Plate cylinder comprises a first gripper arrangement for gripping one Pressure plate and for aligning the pressure plate on one to the plate cylinder adjacent cylinder, and a second gripper assembly for moving the plate in Direction of a gap or channel formed in the plate cylinder.
  • the first gripper arrangement comprises resilient grippers that enable the plate to be aligned with the adjacent cylinder, the first gripper arrangement preferably exclusively in the radial direction adjacent cylinder is movable.
  • the second gripper arrangement is preferably in a direction essentially radial to the plate cylinder.
  • the device preferably comprises an insertion device for inserting the Trailing edge of the pressure plate in the gap or channel.
  • the present invention also preferably provides an offset printing machine that has one Plate cylinder with plate clamping device and one in the cylinder surface formed receiving gap or channel, a blanket cylinder, which with the Plate cylinder forms a gap, and comprises a plate applicator, the one first gripper arrangement for gripping the pressure plate and for aligning the pressure plate on the blanket cylinder and a second gripper arrangement for moving the printing plate has in the direction of the receiving gap.
  • Fig. 1 shows a schematic side view of an inventive Plate application device 10, the first gripper assembly 20, a second Gripper assembly 30 and an insertion device 40 comprises.
  • the Plate application device is arranged adjacent to an offset printing unit 1, which a plate cylinder 2, an adjacent to this upper blanket cylinder 3 and comprises a lower blanket cylinder or impression cylinder 4.
  • an offset printing unit 1 which a plate cylinder 2, an adjacent to this upper blanket cylinder 3 and comprises a lower blanket cylinder or impression cylinder 4.
  • a Plate clamping device 5 which is a plate clamping device 6 in the direction of Plate cylinder surface or moved away from this.
  • the jig can for example similar to that in US 5,284,093, US 5,553,544 and US 5,678,487 described clamping device be formed.
  • Between the side wall of the Cylinder channel or gap and the plate clamping device 6 is preferably a Gap 7, in which a leading edge 62 and a trailing edge 64 of a pressure plate 60 can be recorded.
  • the first gripper arrangement comprises at least one first gripper 22, which is preferably in a gripper holder 24 between a first spring 26 and a second spring 27 is held.
  • the first gripper arrangement is preferably in a guide rail 28 movable and can record and hold the plate 60, for example by suction.
  • the first gripper 22 moves in the guide rail 28 in such a way that the plate 60 is moved radially with respect to the blanket cylinder 3.
  • the first gripper 22 is thereby of springs or generally resilient means 26 and 27 in the manner held that it is slightly flexible radially in the direction of the springs, but in the axial direction, i.e. H. 1 in the direction of the plane of the drawing, and tangential to the blanket cylinder 3 is immobile or stationary.
  • the grippers can have a vacuum device and a connected flexible pipe connection with suction air.
  • the Suction pads can for example be similar to those described in US 5,443,006 Suction attachments can be formed.
  • FIG. 7 shows a cross-sectional view of the first gripper arrangement 20, in which it is clear that the gripper arrangement 20 is preferably a plurality of (through which dotted lines indicated) grippers 22, 23 and 29 includes between springs being held.
  • the gripper holder 24 can be designed as a horizontal bar, which is movable in the guide rail 28.
  • the gripper bracket 24 is preferred driven by gear wheels driven by a motor.
  • the gripper holder 24 is radially in the direction of the Blanket cylinder 3 moves that its leading edge 62 in its entirety Blanket cylinder 3 contacted. Doing so will result in misalignment or a shift the leading edge 62 with respect to the blanket cylinder 3, as in devices of the State of the art can occur, corrected by the springs 26 and 27, by which the front edge 62 is aligned on the surface of the blanket cylinder 3. On in this way, the front edge 62 on the parallel to the blanket cylinder 3rd extending plate cylinder 2 aligned. Accordingly, after the alignment process both the front edge 62 and the axis 102 of the plate cylinder 2 and the axis 103 of the blanket cylinder 3 all arranged parallel to each other.
  • the second gripper arrangement 30 with a gripper 31, one second gripper holder 32 and a guide rail 33 in such a way that they can grip plate 60 in its correctly aligned position.
  • the plate 60 for example, by means of suction in its aligned position.
  • the first gripper assembly 20 then releases the plate 60 free by lifting the suction or z. B. a blown air flow is generated.
  • the gripper holder 32 is then in the guide rail 33 in the way that the leading edge 62 of the plate 60 in the space 7 on the open clamping device 5 of the plate cylinder 2 is inserted, the Plate cylinder is in a first application position.
  • the guide rail 33 runs preferably arcuate, so that the plate is inserted at a suitable angle.
  • the guide rail 33 can also be shaped such that the front edge 62 initially rests on the surface of the clamping device 6. This will make the plate 60 bent backwards due to their flexibility and in this way preferably with a resilient force is applied.
  • the plate 60 can then be moved along the Surface of the clamping device 6 are moved upwards, so that the front edge of the The plate automatically jumps into space 7.
  • the grippers 31 are preferably in the axial direction, i. H. 2, 3 and 4 perpendicular to Drawing level, resiliently arranged.
  • the entire gripper arrangement 30 is also axial movable, e.g. B. by means of a linear drive for the guide rail 33 in the axial Direction.
  • the clamping device 5 is then closed and the suction force lifted or a blast air flow generated, so that the second gripper assembly 30 the Plate 60 releases. In this way, the plate 60 is correctly aligned in the Space 7 fixed.
  • the plate cylinder 2 is then in the in Fig. 4 by the Arrow indicated direction rotated to the plate 60 on the plate cylinder 2nd
  • the plate 60 is covered by the gap between the Plate cylinder and the blanket cylinder and can be pulled through the deactivated gripper 31 are additionally supported.
  • the gripper 31 can also retracted when the inherent rigidity of the plate 60 is sufficient to be a Prevent damage from components of the plate applicator 10.
  • the trailing edge 64 is in the intermediate space 7 introduced.
  • the plate clamping device 6 is activated and from the surface of the plate cylinder 2 moved away.
  • the insertion device 40, the z. B. similar to that in the Inserting device described in US Pat. No. 5,678,487 can be activated and activated moves or pushes the trailing edge 64 into the space 7. Then preferably the clamping device 6 is withdrawn and the insertion device 40 deactivated so that the plate 60 is firmly attached to the plate cylinder 2.
  • Removing plate 60 after a print job can be done in several ways take place, e.g. B. by means of a preferably on the other side of the plate cylinder arranged automatic removal device or by means of Plate application device 10, which guides the plate away from the plate cylinder 2.
  • the second gripper arrangement is arranged on the gripper holder 24 shown in FIG. 7 his.
  • the gripper holder 24 can be inserted the plate after its alignment on the blanket cylinder are turned upwards.
  • a rod mechanism can also be provided, as shown in FIG. 8 and 9 is shown.
  • the two gripper assemblies 20 and 30 can be on one Gripper bracket 80 may be attached, the second gripper assembly 30 preferably is arranged below the first gripper arrangement 20, as shown in FIG. 10.
  • the holder 80 is preferably at its lower end via a pivot 82 an air cylinder bracket 84 and a first arm 90 of the rod mechanism connected. At its upper end, the holder 80 is connected via a pivot pin 88 (FIG. 9) connected to one side of a lever 94 of the rod mechanism. The other side of the Lever 94 is via a pivot 95 with one end 93 of a second arm 92 connected. The pivot 95 is in turn with a on the air cylinder bracket 84 stored compressed air cylinder 96 connected.
  • the arms 90 and 92 are preferably at their ends 98 and 99 z. B. in a frame rotatably mounted.
  • An operating arm 100 for moving the first arm 90 is on one End 98 of the first arm 90 and one end of the other Air cylinder 104 connected.
  • a similar rod mechanism is arranged on the other side of the holder 80.
  • the operation of the rod mechanism is explained below.
  • the first Gripper assembly 20 grips a plate from a plate supply.
  • the compressed air cylinder 102 is activated so that arm 90 turns in the direction indicated by arrow 108 its end 98 is rotated. This will make the gripper bracket 80 down in the direction of the arrow 110 pivoted so that the plate against the Surface of the blanket cylinder is moved and aligned with this. Subsequently the plate is gripped by the second gripper arrangement 30 and by the first Gripper assembly 20 released.
  • the compressed air cylinder 96 is then activated so that the gripper holder 80 rotated in the direction of arrow 112 and the plate edge against the terminal block or the surface of the plate cylinder is moved.
  • the plate jumps into the cylinder channel or gap and is then axially aligned in the manner described above, preferably by adding the entire rod mechanism over others not shown Actuators, e.g. B. a pneumatic cylinder is moved axially. Following that activated the plate clamping device in the plate cylinder and the plate from the Gripper assembly 30 released.
  • Actuators e.g. B. a pneumatic cylinder is moved axially.
  • the second air cylinder 96 can also be used to grip new plates to support from a plate stock.
  • the plate cylinder 2 can be used as a plate cylinder with a narrow channel or gap be trained, which means in the sense of this application that the cylinder channel is narrower than about 0.635 cm (0.25 inches).
  • the blanket cylinder is used to align the plate.
  • another cylinder adjacent to the plate cylinder e.g. B. an ink roller or dampening roller, for aligning the plate before inserting it into the cylinder channel use.
  • On the blanket cylinder there is preferably a channelless blanket applied, which gives the advantage that the plate edge during the Alignment cannot enter a blanket channel, which leads to an error in the Alignment can result.
  • the term "gripper arrangement” denotes in this Registration at least one gripper that is suitable for the activated in the To hold the pressure plate.

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  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)
  • Coating Apparatus (AREA)

Abstract

The moving up process moves a printing plate (60) onto the platen cylinder of a rotary printing press. The first edge (62) of the printing plate is straightened up relative to a cylinder (3) adjacent to the platen cylinder (2). The first edge of the plate is then inserted into a gap (7) formed in the platen cylinder. The plate is then pulled onto the platen cylinder.

Description

Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zum automatischen Aufbringen einer Druckplatte auf einen Plattenzylinder in einer Rotationsdruckmaschine gemäß dem Oberbegriff von Anspruch 1 und 12.The present invention relates to a method and an apparatus for automatic Applying a printing plate to a plate cylinder in a rotary printing press according to the preamble of claims 1 and 12.

Als nächstliegenden Stand der Technik wird Dokument US-A-5 595 119 erachtet. Die US-A-5 595 119 beschreibt ein Verfahren einer Vorrichtung für den automatischen Druckplattenwechsel in einer Rotationsdruckmaschine, wobei eine neue Druckplatte 80U in einer schwenkbaren Kassette 30U vorrätig aufgenommen ist. Die Kassette 30U wird derart geschwenkt, dass ihr unteres Ende in die Nähe einer Anpresswalze 28U positioniert wird, welche gegenüber der Oberfläche eines Plattenzylinders 13U angeordnet ist. In dieser Position wird ein Pneumatikzylinder 61U aktiviert, so dass ein Greifer 60, welcher das hintere Ende der Platte 80U hält, entlang der Kassette in Richtung der Anpresswalze 28U bewegt wird. Diese Bewegung wird beendet, sobald eine Vorderkante 81U eine Position bei der Anpresswalze 28U erreicht. Sodann presst die Anpresswalze 28U die Vorderkante 81U in einen Klemmspalt des Plattenzylinders 13U. Vor dem Aufziehen der Druckplatte 80U auf den Plattenzylinder 13U durch Rotation des Plattenzylinders 13U bei angestellter Anpresswalze 28U wird der Klenunspalt zum Festhalten der Plattenvorderkante 81U geschlossen.Document US-A-5 595 119 is considered the closest prior art. The US-A-5 595 119 describes a method of an automatic device Printing plate change in a rotary printing machine, with a new printing plate 80U is stored in a swiveling cassette 30U. The cassette 30U will pivoted such that its lower end is positioned in the vicinity of a pressure roller 28U which is located opposite the surface of a plate cylinder 13U. In this Position, a pneumatic cylinder 61U is activated, so that a gripper 60, which the the rear end of the plate 80U holds along the cassette toward the platen roller 28U is moved. This movement stops as soon as a leading edge 81U reaches a position reached at the pressure roller 28U. Then the pressure roller 28U presses the front edge 81U in a clamping gap of the plate cylinder 13U. Before mounting the pressure plate 80U on the plate cylinder 13U by rotating the plate cylinder 13U when the Press roller 28U becomes the cleat nip for holding the plate leading edge 81U closed.

Des Weiteren offenbart Dokument WO-A-95/19262 eine Vorrichtung zur Montage, Demontage und zum Transport von Druckplatten auf und von einem Zylinder einer Rotationsdruckmaschine. Dabei ist eine plattenzylindernahe, gestellfeste Druckplatten-Bereitstellungseinrichtung mit mindestens einer vorpositionierten Druckplatte vorgesehen, sowie eine Traverse mit mindestens einer Greif- und Andrückeinrichtung, die in einer Transportebene mittels Linearantrieb positionierbar angeordnet ist, wobei die Transportebene annähernd parallel und oberhalb zu einer von einer Zylindermantelfläche des Zylinders und Einhängeleiste der Druckplatten-Bereitstellungseinrichtung bestimmten Tangente liegt. Weiterhin ist eine mit auf die druckende Seite der Druckplatte wirkenden Saugleisten bestückte Greifereinheit der Greif- und Andrückeinrichtung vorgesehen, wobei die Greifereinheit ausgehend von der Transportebene von und zu einer Einhängeleiste des Zylinders bewegbar angeordnet ist und entlang der Einhängeleiste des Zylinders parallel zu einer Drehachse des Zylinders derart bewegbar angeordnet ist, dass eine an der Greifereinheit fixierte Druckplatte gegen an der Einhängeleiste des Zylinders angeordnete Seitenregisteranschläge mit festlegbarer Kraft andrückbar ist.Furthermore, document WO-A-95/19262 discloses a device for assembly, Disassembly and transport of printing plates on and from a cylinder Rotary printing press. There is a plate-mounted, plate-fixed printing plate supply device provided with at least one pre-positioned pressure plate, and a traverse with at least one gripping and pressing device, which in one Transport plane is positioned by means of a linear drive, the Transport plane approximately parallel and above to one of a cylinder surface of the cylinder and mounting rail of the printing plate preparation device Tangent lies. There is also one that acts on the printing side of the printing plate Suction strips equipped gripper unit of the gripping and pressing device provided, wherein the gripper unit starting from the transport level from and to a hanging bar of the Cylinder is arranged to be movable and parallel to the hanging rail of the cylinder an axis of rotation of the cylinder is movably arranged such that one on the gripper unit fixed pressure plate against those arranged on the hanging rail of the cylinder Side register stops can be pressed with a definable force.

In der US 5,390,603 ist ein Verfahren zum automatischen Wechseln von Druckplatten an einem Plattenzylinder einer Druckmaschine beschrieben. Der Plattenzylinder umfasst eine Befestigungs- oder Klemmvorrichtung für die Vorderkante und die Hinterkante einer Druckplatte. Zur Durchführung eines Plattenwechsels werden die Plattenzylinder in eine Wechselposition bewegt, in der die Hinterkante und die Vorderkante der Druckplatten freigegeben werden. Daraufhin werden die Plattenzylinder in die entgegengesetzte Richtung gedreht, um die Druckplatte abzurollen. Anschließend wird jedem Plattenzylinder mittels Saugarmen eine neue Druckplatte zugeführt, wobei die Saugarme die Druckplatte in der Weise halten, dass die Vorderkante der neuen Platte an der Vorderkanten-Befestigungsvorrichtung befestigt werden kann.No. 5,390,603 discloses a method for automatically changing printing plates described a plate cylinder of a printing press. The plate cylinder includes one Fastening or clamping device for the front edge and the rear edge of one Printing plate. To perform a plate change, the plate cylinders are placed in a Change position moves in the trailing edge and the leading edge of the printing plates be released. Then the plate cylinders are placed in the opposite Direction turned to unroll the pressure plate. Then each plate cylinder a new pressure plate is fed by means of suction arms, the suction arms feeding the pressure plate in such a way that the leading edge of the new plate is attached to the leading edge fastening device can be attached.

Die US 5,495,805 und die US 5,443,006 beschreiben Vorrichtungen zur Zu- und Abfuhr von Druckplatten zu bzw. von einem Plattenzylinder. Das in diesen Patentschriften beschriebene Magazin umfasst zwei Haltewellen, in die von oben Kassetten eingefügt werden können. Eine der Kassetten ist zur Aufnahme der benutzten Druckplatten ursprünglich leer, während in einer anderen Kassette die auf die Plattenzylinder aufzubringenden neuen Druckplatten enthalten sind. Eine Plattenzuführeinrichtung entnimmt die Platten aus der die neuen Platten enthaltenden Kassette. Eine Plattenwegführeinrichtung entfernt die Platten vom Plattenzylinder und legt sie in die Kassette für die alten Platten. Die Plattenwegführeinrichtung umfasst Saugelemente, die auf einem mittels einer ersten Antriebsvorrichtung entlang einer ersten Führung verfahrbaren ersten Wagen angeordnet sind. Zum Entfernen der Platte wird die Hinterkantenklemmeinrichtung geöffnet, so dass die Elastizität der Druckplatte ein Anstoßen der Hinterkante an eine Führungswalze bewirkt. Der Plattenzylinder wird anschließend rückwärts gedreht, so dass die Platte in das Magazin eingefügt wird. Im Magazin werden die Saugelemente aktiviert. Auf diese Weise wird, nachdem die Vorderkante der Druckplatte ebenfalls freigegeben wurde, die alte Druckplatte mittels der Saugelemente des ersten Wagens in eine obere Position bewegt, während der Plattenzylinder weiterhin rückwärts gedreht wird. Die alte Platte wird anschließend in die Kassette für alte Druckplatten eingelegt. Zum Zuführen einer neuen Platte umfasst der Plattenzuführmechanismus einen zweiten Wagen mit Saugelementen. Die Vorderkante der neuen Druckplatte wird zur Vorderkantenklemmeinrichtung des Plattenzylinders bewegt. Die Platte wird ausgerichtet und festgeklemmt. Anschließend wird der Plattenzylinder vorwärts gedreht, so dass die Druckplatte um die Außenoberfläche des Plattenzylinders gelegt wird. Durch eine Reduzierung der Saugkraft der Saugelemente kann die Druckplatte weiterhin von den Saugelementen gehalten werden, während sie aufgrund der Drehung des Plattenzylinders über diese hinweg gleitet. Bevor die Hinterkante der Druckplatte die letzten beiden Saugelemente passiert, werden diese deaktiviert und die Hinterkante der Druckplatte mittels einer Andrückwalze radial in die Hinterkantenklemmeinrichtung gedrückt. Daraufhin wird die Hinterkante festgeklemmt und die Platte gespannt.US 5,495,805 and US 5,443,006 describe feed and discharge devices from printing plates to or from a plate cylinder. That in these patents described magazine comprises two holding shafts, inserted into the cassettes from above can be. One of the cassettes is for holding the used printing plates originally empty, while in another cassette the on the plate cylinder new printing plates to be applied are included. A plate feeder removes the plates from the cassette containing the new plates. A Plate path guiding device removes the plates from the plate cylinder and places them in the Cassette for the old records. The plate path guide includes suction elements that on a by means of a first drive device along a first guide movable first carriage are arranged. To remove the plate, the Trailing edge clamping device opened so that the elasticity of the pressure plate Impacts the rear edge against a guide roller. The plate cylinder will then turned backwards so that the plate is inserted into the magazine. in the Magazine, the suction elements are activated. This way, after the Front edge of the printing plate was also released, using the old printing plate Suction elements of the first carriage moved to an upper position during the Plate cylinder continues to be rotated backwards. The old plate is then placed in the Cassette for old printing plates inserted. To feed a new plate, the includes Plate feed mechanism a second carriage with suction elements. The leading edge of the new printing plate is moved to the leading edge clamping device of the plate cylinder. The plate is aligned and clamped. Then the plate cylinder rotated forward so that the pressure plate is around the outer surface of the plate cylinder is placed. The pressure plate can be reduced by reducing the suction power of the suction elements continue to be held by the suction elements, while due to the rotation of the Plate cylinder slides over this. Before the rear edge of the pressure plate passes the last two suction elements, they are deactivated and the rear edge of the Pressure plate radially into the trailing edge clamping device by means of a pressure roller pressed. Then the rear edge is clamped and the plate is stretched.

In der U 5,701,822 ist eine Plattenwechsel-Vorrichtung für eine Offsetdruckmaschine beschrieben. Der Plattenzylinder umfasst eine automatische Klemmvorrichtung in einem Spalt oder Kanal des Plattenzylinders. Zur Unterstützung der Positionierung der Druckplatte auf dem Plattenzylinder ist ein Halteelement vorgesehen. Die aufzubringende Druckplatte wird von einer Druckplattenladeeinheit gehalten. Das Halteelement erfasst die einzufügende Platte und positioniert die Vorderkante am Plattenzylinder. Durch Drehung des Plattenzylinders gleitet die Vorderkante in den Spalt oder Kanal und wird von der automatischen Klemmeinrichtung festgeklemmt. Die Druckform kann anschließend um die Umfangsoberfläche des Plattenzylinders gespannt werden. Mit Hilfe einer Walze wird die Hinterkante der Platte im Plattenzylinder befestigt.In U 5,701,822 there is a plate changing device for an offset printing machine described. The plate cylinder comprises an automatic clamping device in one Gap or channel of the plate cylinder. To support the positioning of the Pressure plate on the plate cylinder, a holding element is provided. The one to apply Printing plate is held by a printing plate loading unit. The holding element detects the plate to be inserted and positions the front edge on the plate cylinder. By rotation of the plate cylinder slides the leading edge into the gap or channel and is from the automatic clamping device clamped. The printing form can then by the Circumferential surface of the plate cylinder can be clamped. With the help of a roller Fixed rear edge of the plate in the plate cylinder.

Ein Nachteil der beschriebenen Vorrichtungen und Verfahren besteht darin, dass die Vorderkante des Plattenzylinders verrutschen kann, so dass sie vor dem Einfügen nicht mehr entlang des Zylinderkanals ausgerichtet ist. Dies kann zu einer Fehlfunktion der automatischen Plattenwechseleinrichtung führen. Insbesondere bei Plattenzylindern mit sehr kleinem Zylinderspalt führen die beschriebenen Verfahren und Vorrichtungen häufig zu Fehlfunktionen oder können gar nicht eingesetzt werden.A disadvantage of the devices and methods described is that the The front edge of the plate cylinder can slip, so that it does not slide before insertion is aligned more along the cylinder channel. This can cause the malfunction automatic plate changing device. Especially with plate cylinders The methods and devices described frequently lead to a very small cylinder gap malfunction or cannot be used at all.

Die US 5,553,544 und die US 5,284,093 beschreiben Plattenzylinder mit einem schmalen Zylinderspalt, in den sowohl die Vorderkante als auch die Hinterkante der Druckplatte eingefügt werden, so dass zwischen ihnen nur ein schmaler Zwischenraum besteht. In der US 5,678,487 ist ebenfalls ein Plattenzylinder mit schmalem Zylinderspalt und eine Hinterkanteneinfügevorrichtung beschrieben.US 5,553,544 and US 5,284,093 describe plate cylinders with a narrow one Cylinder gap in which both the front edge and the rear edge of the pressure plate be inserted so that there is only a small space between them. In the US 5,678,487 is also a plate cylinder with a narrow cylinder gap and one Trailing edge insertion device described.

Eine Aufgabe der vorliegenden Erfindung ist es, ein verbessertes Verfahren und eine verbesserte Vorrichtung zum automatischen Aufbringen von Druckplatten auf einen Plattenzylinder in einer Rotationsdruckmaschine zu schaffen.An object of the present invention is to provide an improved method and an improved device for the automatic application of printing plates on a To create plate cylinders in a rotary printing press.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale der Ansprüche 1 und 12 gelöst.This object is achieved by the features of claims 1 and 12.

Weitere Merkmale der Erfindung ergeben sich aus den Unteransprüchen.Further features of the invention emerge from the subclaims.

Das erfindungsgemäße Verfahren zum automatischen Aufbringen einer Druckplatte auf einen Plattenzylinder sieht vor, dass eine erste Kante einer Druckplatte gegen einen an den Plattenzylinder angrenzenden Zylinder angestellt und dadurch ausgerichtet wird, die erste Kante der Druckplatte in einen Spalt oder Kanal im Plattenzylinder eingefügt wird und die Druckplatte anschließend um den Plattenzylinder herum gelegt wird.The method according to the invention for automatically applying a printing plate a plate cylinder provides a first edge against a printing plate a cylinder adjoining the plate cylinder and thereby aligned the first edge of the printing plate into a gap or channel in the plate cylinder is inserted and the printing plate is then placed around the plate cylinder becomes.

Durch das erfindungsgemäße Verfahren wird eine bessere Ausrichtung der Platte vor dem Einfügen in den Zylinderspalt oder -kanal erreicht. Dadurch kann die Vorderkante der Platte zuverlässig und korrekt ausgerichtet in den Zylinderspalt oder -kanal eingeführt werden, wodurch sogar bei Plattenzylindern mit einem sehr schmalen Spalt ein zuverlässiges Aufbringen der Platte ermöglicht wird.The inventive method is a better alignment of the plate before Inserted into the cylinder gap or channel reached. This allows the front edge of the Plate inserted reliably and correctly aligned in the cylinder gap or channel be, which means even with plate cylinders with a very narrow gap reliable application of the plate is made possible.

Als weiteren Schritt umfaßt das erfindungsgemäße Verfahren das Befestigen der ersten Kante im Zylinderspalt. Anschließend wird der Plattenzylinder vorzugsweise gedreht, so dass die Platte um den Plattenzylinder gelegt wird. Eine Einfügevorrichtung kann dann dazu eingesetzt werden, das Einfügen der Hinterkante der Platte in den Spalt zu unterstützen.As a further step, the method according to the invention comprises fastening the first edge in the cylinder gap. The plate cylinder is then preferably rotated, so that the plate is placed around the plate cylinder. An insertion device can then be used to insert the trailing edge of the plate into the gap support.

Der angrenzende Zylinder wird vorzugsweise durch einen Gummituchzylinder einer Offset-Druckmaschine gebildet. Dieser bietet eine große angrenzende Fläche, an der die Platte ausgerichtet werden kann.The adjacent cylinder is preferably one by a blanket cylinder Offset printing press formed. This offers a large adjacent area on which the Plate can be aligned.

Die erfindungsgemäße Vorrichtung zum Aufbringen einer Druckplatte auf einen Plattenzylinder umfasst eine erste Greiferanordnung zum Ergreifen einer Druckplatte und zum Ausrichten der Druckplatte an einem an den Plattenzylinder angrenzenden Zylinder, und eine zweite Greiferanordnung zum Bewegen der Platte in Richtung eines im Plattenzylinder gebildeten Spalts oder Kanals.The inventive device for applying a printing plate on a Plate cylinder comprises a first gripper arrangement for gripping one Pressure plate and for aligning the pressure plate on one to the plate cylinder adjacent cylinder, and a second gripper assembly for moving the plate in Direction of a gap or channel formed in the plate cylinder.

Erfindungsgemäß umfasst die erste Greiferanordnung federnde Greifer, die ein Ausrichten der Platte am angrenzenden Zylinder ermöglichen, wobei die erste Greiferanordnung vorzugsweise ausschließlich in radialer Richtung zum angrenzenden Zylinder verfahrbar ist. Die zweite Greiferanordnung ist vorzugsweise in eine zum Plattenzylinder im Wesentlichen radiale Richtung verfahrbar.According to the invention, the first gripper arrangement comprises resilient grippers that enable the plate to be aligned with the adjacent cylinder, the first gripper arrangement preferably exclusively in the radial direction adjacent cylinder is movable. The second gripper arrangement is preferably in a direction essentially radial to the plate cylinder.

Ferner umfasst die Vorrichtung vorzugsweise eine Einfügevorrichtung zum Einfügen der Hinterkante der Druckplatte in den Spalt oder Kanal.Furthermore, the device preferably comprises an insertion device for inserting the Trailing edge of the pressure plate in the gap or channel.

Die vorliegende Erfindung sieht ferner vorzugsweise eine Offset-Druckmaschine vor, die einen Plattenzylinder mit Plattenspannvorrichtung und einem in der Zylinderoberfläche gebildeten Aufnahmespalt oder -kanal, einen Gummituchzylinder, der mit dem Plattenzylinder einen Spalt bildet, sowie eine Plattenaufbringvorrichtung umfasst, die eine erste Greiferanordnung zum Ergreifen der Druckplatte und zum Ausrichten der Druckplatte am Gummituchzylinder und eine zweite Greiferanordnung zum Bewegen der Druckplatte in Richtung des Aufnahmespalts aufweist.The present invention also preferably provides an offset printing machine that has one Plate cylinder with plate clamping device and one in the cylinder surface formed receiving gap or channel, a blanket cylinder, which with the Plate cylinder forms a gap, and comprises a plate applicator, the one first gripper arrangement for gripping the pressure plate and for aligning the pressure plate on the blanket cylinder and a second gripper arrangement for moving the printing plate has in the direction of the receiving gap.

Die Merkmale der vorliegenden Erfindung werden in der folgenden Beschreibung bevorzugter Ausführungsbeispiele in Zusammenhang mit den beigefügten, nachfolgend aufgeführten Zeichnungen näher erläutert.The features of the present invention will become apparent in the following description preferred embodiments in connection with the accompanying, below listed drawings explained in more detail.

Es zeigen:

Fig. 1
eine Seitenansicht einer Ausführungsform der erfindungsgemäßen Vorrichtung in einem Zustand, in dem eine Platte von der ersten Greiferanordnung gehalten wird;
Fig. 2
eine Seitenansicht einer Ausführungsform der erfindungsgemäßen Vorrichtung in einem Zustand, in dem die Platte am Gummituchzylinder ausgerichtet ist;
Fig. 3
eine Seitenansicht einer Ausführungsform der erfindungsgemäßen Vorrichtung in einem Zustand, in dem eine Platte von einer zweiten Greiferanordnung gehalten und in den Zylinderkanal des Plattenzylinders eingefügt wird;
Fig. 4
eine Seitenansicht einer Ausführungsform der erfindungsgemäßen Vorrichtung in einem Zustand, in dem die Platte in den Zylinderkanal eingefügt und die Plattenklemmvorrichtung zur Drehung des Zylinders geschlossen ist;
Fig. 5
eine Seitenansicht einer Ausführungsform der erfindungsgemäßen Vorrichtung in einem Zustand, in dem die Platte durch den Spalt zwischen dem Plattenzylinder und dem Gummituchzylinder bewegt wird;
Fig. 6
eine Seitenansicht einer Ausführungsform der erfindungsgemäßen Vorrichtung in einem Zustand, in dem die Hinterkante der Platte in den Zylinderkanal eingefügt wird;
Fig. 7
eine Querschnittsanordnung einer möglichen Anordnung der erfindungsgemäßen ersten Greiferanordnung;
Fig. 8
eine alternative Ausführungsform eines Abschnitts zum Stützen der erfindungsgemäßen ersten und zweiten Greiferanordnung;
Fig. 9
eine schematische Detailansicht der in Fig. 8 gezeigten Anordnung; und
Fig. 10
eine mögliche Anordnung der ersten und zweiten Greiferanordnung in Verbindung mit der in Fig. 8 gezeigten alternativen Ausführungsform.
Show it:
Fig. 1
a side view of an embodiment of the device according to the invention in a state in which a plate is held by the first gripper arrangement;
Fig. 2
a side view of an embodiment of the device according to the invention in a state in which the plate is aligned with the blanket cylinder;
Fig. 3
a side view of an embodiment of the device according to the invention in a state in which a plate is held by a second gripper arrangement and inserted into the cylinder channel of the plate cylinder;
Fig. 4
a side view of an embodiment of the device according to the invention in a state in which the plate is inserted into the cylinder channel and the plate clamping device is closed for rotating the cylinder;
Fig. 5
a side view of an embodiment of the device according to the invention in a state in which the plate is moved through the gap between the plate cylinder and the blanket cylinder;
Fig. 6
a side view of an embodiment of the device according to the invention in a state in which the rear edge of the plate is inserted into the cylinder channel;
Fig. 7
a cross-sectional arrangement of a possible arrangement of the first gripper arrangement according to the invention;
Fig. 8
an alternative embodiment of a portion for supporting the first and second gripper assembly according to the invention;
Fig. 9
a schematic detailed view of the arrangement shown in Fig. 8; and
Fig. 10
a possible arrangement of the first and second gripper arrangement in connection with the alternative embodiment shown in FIG. 8.

Fig. 1 zeigt eine schematische Seitenansicht einer erfindungsgemäßen Plattenaufbringeinrichtung 10, die eine erste Greiferanordnung 20, eine zweite Greiferanordnung 30 und eine Einfügevorrichtung 40 umfasst. Die Plattenaufbringeinrichtung ist angrenzend an ein Offset-Druckwerk 1 angeordnet, welches einen Plattenzylinder 2, einen an diesen angrenzenden oberen Gummituchzylinder 3 und einen unteren Gummituchzylinder oder Gegendruckzylinder 4 umfasst. In einem in der Oberfläche des Plattenzylinders 2 gebildeten Spalt oder Kanal befindet sich eine Plattenspannvorrichtung 5, die eine Plattenklemmvorrichtung 6 in Richtung der Plattenzylinderoberfläche oder von dieser weg bewegt. Die Spannvorrichtung kann beispielsweise ähnlich der in der US 5,284,093, der US 5,553,544 und der US 5,678,487 beschriebenen Spannvorrichtung ausgebildet sein. Zwischen der Seitenwand des Zylinderkanals oder -spalts und der Plattenklemmvorrichtung 6 besteht vorzugsweise ein Zwischenraum 7, in dem eine Vorderkante 62 und eine Hinterkante 64 einer Druckplatte 60 aufgenommen werden können.Fig. 1 shows a schematic side view of an inventive Plate application device 10, the first gripper assembly 20, a second Gripper assembly 30 and an insertion device 40 comprises. The Plate application device is arranged adjacent to an offset printing unit 1, which a plate cylinder 2, an adjacent to this upper blanket cylinder 3 and comprises a lower blanket cylinder or impression cylinder 4. In one in the Surface of the plate cylinder 2 formed gap or channel is one Plate clamping device 5, which is a plate clamping device 6 in the direction of Plate cylinder surface or moved away from this. The jig can for example similar to that in US 5,284,093, US 5,553,544 and US 5,678,487 described clamping device be formed. Between the side wall of the Cylinder channel or gap and the plate clamping device 6 is preferably a Gap 7, in which a leading edge 62 and a trailing edge 64 of a pressure plate 60 can be recorded.

Die erste Greiferanordnung umfasst mindestens einen ersten Greifer 22, der vorzugsweise in einer Greiferhalterung 24 zwischen einer ersten Feder 26 und einer zweiten Feder 27 gehalten wird. Die erste Greiferanordnung ist vorzugsweise in einer Führungsschiene 28 verfahrbar und kann die Platte 60 beispielsweise durch Saugkraft erfassen und halten. Der erste Greifer 22 bewegt sich in der Führungsschiene 28 in der Weise, dass die Platte 60 bezüglich des Gummituchzylinders 3 radial bewegt wird. Der erste Greifer 22 wird dabei von den Federn oder allgemein von federelastischen Mitteln 26 und 27 in der Weise gehalten, dass er radial in Richtung der Federn leicht flexibel, jedoch in axiale Richtung, d. h. in Fig. 1 in Richtung der Zeichnungsebene, und tangential zum Gummituchzylinder 3 unbeweglich oder ortsfest ist. Die Greifer können über eine Vakuumvorrichtung und eine mit ihnen verbundene flexible Rohrverbindung mit Saugluft beaufschlagbar sein. Die Sauggreifer können beispielsweise ähnlich den in der US 5,443,006 beschriebenen Saugaufsätzen ausgebildet sein.The first gripper arrangement comprises at least one first gripper 22, which is preferably in a gripper holder 24 between a first spring 26 and a second spring 27 is held. The first gripper arrangement is preferably in a guide rail 28 movable and can record and hold the plate 60, for example by suction. The first gripper 22 moves in the guide rail 28 in such a way that the plate 60 is moved radially with respect to the blanket cylinder 3. The first gripper 22 is thereby of springs or generally resilient means 26 and 27 in the manner held that it is slightly flexible radially in the direction of the springs, but in the axial direction, i.e. H. 1 in the direction of the plane of the drawing, and tangential to the blanket cylinder 3 is immobile or stationary. The grippers can have a vacuum device and a connected flexible pipe connection with suction air. The Suction pads can for example be similar to those described in US 5,443,006 Suction attachments can be formed.

In Fig. 7 ist eine Querschnittsansicht der ersten Greiferanordnung 20 gezeigt, in der deutlich wird, dass die Greiferanordnung 20 vorzugsweise eine Vielzahl von (durch die punktierten Linien angedeuteten) Greifern 22, 23 und 29 umfasst, die zwischen Federn gehalten werden. Die Greiferhalterung 24 kann als ein Horizontalbalken ausgebildet sein, der in der Führungsschiene 28 verfahrbar ist. Die Greiferhalterung 24 wird vorzugsweise über durch einen Motor angetriebene Zahnräder angetrieben. Eine Greiferanordnung im Sinne dieser Anmeldung kann jedoch auch nur einen Greifer umfassen.FIG. 7 shows a cross-sectional view of the first gripper arrangement 20, in which it is clear that the gripper arrangement 20 is preferably a plurality of (through which dotted lines indicated) grippers 22, 23 and 29 includes between springs being held. The gripper holder 24 can be designed as a horizontal bar, which is movable in the guide rail 28. The gripper bracket 24 is preferred driven by gear wheels driven by a motor. A gripper arrangement in the For the purposes of this application, however, it can also comprise only one gripper.

Sobald die Platte 60 von der ersten Greiferanordnung 22 ergriffen wurde, wird, wie in Fig. 2 gezeigt ist, die Greiferhalterung 24 in der Weise radial in Richtung des Gummituchzylinders 3 bewegt, dass ihre Vorderkante 62 in ihrer Gesamtheit den Gummituchzylinder 3 kontaktiert. Dabei wird eine Fehlausrichtung oder eine Verschiebung der Vorderkante 62 bezüglich des Gummituchzylinders 3, wie sie bei Vorrichtungen des Standes der Technik auftreten kann, durch die Federn 26 und 27 korrigiert, durch welche die Vorderkante 62 auf der Oberfläche des Gummituchzylinders 3 ausgerichtet wird. Auf diese Weise wird die Vorderkante 62 an dem parallel zum Gummituchzylinder 3 verlaufenden Plattenzylinder 2 ausgerichtet. Demgemäß sind nach dem Ausrichtvorgang sowohl die Vorderkante 62 als auch die Achse 102 des Plattenzylinders 2 und die Achse 103 des Gummituchzylinders 3 alle parallel zueinander angeordnet. As soon as the plate 60 has been gripped by the first gripper arrangement 22, as shown in FIG. 2, the gripper holder 24 is radially in the direction of the Blanket cylinder 3 moves that its leading edge 62 in its entirety Blanket cylinder 3 contacted. Doing so will result in misalignment or a shift the leading edge 62 with respect to the blanket cylinder 3, as in devices of the State of the art can occur, corrected by the springs 26 and 27, by which the front edge 62 is aligned on the surface of the blanket cylinder 3. On in this way, the front edge 62 on the parallel to the blanket cylinder 3rd extending plate cylinder 2 aligned. Accordingly, after the alignment process both the front edge 62 and the axis 102 of the plate cylinder 2 and the axis 103 of the blanket cylinder 3 all arranged parallel to each other.

Im Anschluss daran wird die zweite Greiferanordnung 30 mit einem Greifer 31, einer zweiten Greiferhalterung 32 und einer Führungsschiene 33 in der Weise verfahren, dass sie die Platte 60 in ihrer korrekt ausgerichteten Position ergreifen kann. Durch die Greiferanordnung 30 wird die Platte 60 beispielsweise mittels Saugkraft in ihrer ausgerichteten Position ergriffen. Daraufhin gibt die erste Greiferanordnung 20 die Platte 60 frei, indem die Saugkraft aufgehoben oder z. B. ein Blasluftstrom erzeugt wird.Subsequently, the second gripper arrangement 30 with a gripper 31, one second gripper holder 32 and a guide rail 33 in such a way that they can grip plate 60 in its correctly aligned position. Through the Gripper assembly 30, the plate 60, for example, by means of suction in its aligned position. The first gripper assembly 20 then releases the plate 60 free by lifting the suction or z. B. a blown air flow is generated.

Wie in Fig. 3 gezeigt ist, wird dann die Greiferhalterung 32 in der Führungsschiene 33 in der Weise verfahren, dass die Vorderkante 62 der Platte 60 in den Zwischenraum 7 an der geöffneten Spannvorrichtung 5 des Plattenzylinders 2 eingeführt wird, wobei sich der Plattenzylinder in einer ersten Aufbringposition befindet. Die Führungsschiene 33 verläuft vorzugsweise bogenförmig, so dass die Platte in einem geeigneten Winkel eingeführt wird. Alternativ kann die Führungsschiene 33 auch derart geformt sein, dass die Vorderkante 62 zunächst an der Oberfläche der Klemmvorrichtung 6 anliegt. Dadurch wird die Platte 60 aufgrund ihrer Flexibilität nach hinten gebogen und auf diese Weise vorzugsweise mit einer federelastischen Kraft beaufschlagt. Anschließend kann die Platte 60 entlang der Oberfläche der Klemmvorrichtung 6 aufwärts bewegt werden, so dass die Vorderkante der Platte selbstständig in den Zwischenraum 7 springt.As shown in FIG. 3, the gripper holder 32 is then in the guide rail 33 in the way that the leading edge 62 of the plate 60 in the space 7 on the open clamping device 5 of the plate cylinder 2 is inserted, the Plate cylinder is in a first application position. The guide rail 33 runs preferably arcuate, so that the plate is inserted at a suitable angle. Alternatively, the guide rail 33 can also be shaped such that the front edge 62 initially rests on the surface of the clamping device 6. This will make the plate 60 bent backwards due to their flexibility and in this way preferably with a resilient force is applied. The plate 60 can then be moved along the Surface of the clamping device 6 are moved upwards, so that the front edge of the The plate automatically jumps into space 7.

Die Greifer 31 sind vorzugsweise in axialer Richtung, d. h. in Fig. 2, 3 und 4 senkrecht zur Zeichenebene, federnd angeordnet. Die gesamte Greiferanordnung 30 ist ebenfalls axial verfahrbar, z. B. mittels eines linearen Antriebs für die Führungsschiene 33 in axialer Richtung. Sobald die Platte 60 in den Zwischenraum 7 eingeführt wurde, wird die zweite Greiferanordnung 30 vorzugsweise axial bewegt, um die Platte gegen einen axialen Plattenanschlag zu bewegen, der für eine korrekte axiale Ausrichtung der Platte sorgt.The grippers 31 are preferably in the axial direction, i. H. 2, 3 and 4 perpendicular to Drawing level, resiliently arranged. The entire gripper arrangement 30 is also axial movable, e.g. B. by means of a linear drive for the guide rail 33 in the axial Direction. Once the plate 60 has been inserted into the space 7, the second one Gripper assembly 30 preferably moves axially to counter the plate against an axial one To move the plate stop, which ensures correct axial alignment of the plate.

Im Anschluss daran wird die Spannvorrichtung 5 geschlossen und die Saugkraft aufgehoben oder ein Blasluftstrom erzeugt, so dass die zweite Greiferanordnung 30 die Platte 60 freigibt. Auf diese Weise wird die Platte 60 korrekt ausgerichtet im Zwischenraum 7 fixiert. Der Plattenzylinder 2 wird anschließend in die in Fig. 4 durch den Pfeil angedeutete Richtung gedreht, um die Platte 60 auf den Plattenzylinder 2 The clamping device 5 is then closed and the suction force lifted or a blast air flow generated, so that the second gripper assembly 30 the Plate 60 releases. In this way, the plate 60 is correctly aligned in the Space 7 fixed. The plate cylinder 2 is then in the in Fig. 4 by the Arrow indicated direction rotated to the plate 60 on the plate cylinder 2nd

Wie in Fig. 5 gezeigt ist, wird die Platte 60 auf diese Weise durch den Spalt zwischen dem Plattenzylinder und dem Gummituchzylinder gezogen und kann dabei durch den deaktivierten Greifer 31 zusätzlich gestützt werden. Alternativ kann der Greifer 31 auch zurückgezogen werden, wenn die Eigensteifigkeit der Platte 60 ausreichend ist, um ein Beschädigung durch Komponenten der Plattenaufbringeinrichtung 10 zu verhindern.In this way, as shown in Fig. 5, the plate 60 is covered by the gap between the Plate cylinder and the blanket cylinder and can be pulled through the deactivated gripper 31 are additionally supported. Alternatively, the gripper 31 can also retracted when the inherent rigidity of the plate 60 is sufficient to be a Prevent damage from components of the plate applicator 10.

Wenn sich der Plattenzylinder 2 nach einer Drehung von ca. 360° wieder in der ursprünglichen Ausgangsposition befindet, wird die Hinterkante 64 in den Zwischenraum 7 eingeführt. Hierzu wird die Plattenklemmvorrichtung 6 aktiviert und von der Oberfläche des Plattenzylinders 2 weg bewegt. Die Einfügevorrichtung 40, die z. B. ähnlich der in der US 5,678,487 beschriebenen Einfügevorrichtung ausgebildet sein kann, wird aktiviert und bewegt oder schiebt die Hinterkante 64 in den Zwischenraum 7. Daraufhin wird vorzugsweise die Klemmvorrichtung 6 zurückgezogen und die Einfügevorrichtung 40 deaktiviert, so dass die Platte 60 fest auf dem Plattenzylinder 2 angebracht ist.When the plate cylinder 2 is back in the after a rotation of about 360 ° is the original starting position, the trailing edge 64 is in the intermediate space 7 introduced. For this purpose, the plate clamping device 6 is activated and from the surface of the plate cylinder 2 moved away. The insertion device 40, the z. B. similar to that in the Inserting device described in US Pat. No. 5,678,487 can be activated and activated moves or pushes the trailing edge 64 into the space 7. Then preferably the clamping device 6 is withdrawn and the insertion device 40 deactivated so that the plate 60 is firmly attached to the plate cylinder 2.

Das Abnehmen der Platte 60 nach einem Druckauftrag kann auf verschiedene Weise erfolgen, z. B. mittels einer vorzugsweise auf der anderen Seite des Plattenzylinders angeordneten automatischen Abnehmvorrichtung oder mittels der Plattenaufbringvorrichtung 10, welche die Platte vom Plattenzylinder 2 weg führt.Removing plate 60 after a print job can be done in several ways take place, e.g. B. by means of a preferably on the other side of the plate cylinder arranged automatic removal device or by means of Plate application device 10, which guides the plate away from the plate cylinder 2.

Alternativ zu den in Fig. 1 gezeigten zwei separaten Greifer-Bewegungsmechanismen kann die zweite Greiferanordnung an der in Fig. 7 gezeigten Greiferhalterung 24 angeordnet sein. Wie in Fig. 1 gezeigt ist, kann in diesem Fall die Greiferhalterung 24 zum Einfügen der Platte nach deren Ausrichtung am Gummituchzylinder aufwärts gedreht werden.As an alternative to the two separate gripper movement mechanisms shown in FIG. 1 the second gripper arrangement is arranged on the gripper holder 24 shown in FIG. 7 his. In this case, as shown in FIG. 1, the gripper holder 24 can be inserted the plate after its alignment on the blanket cylinder are turned upwards.

Als eine weitere Alternative zu den zwei in Fig. 1 gezeigten separaten Greifer-Bewegungsmechanismen kann auch ein Stabmechanismus vorgesehen sein, wie er in Fig. 8 und 9 gezeigt ist. Die beiden Greiferanordnungen 20 und 30 können dabei an einer Greiferhalterung 80 befestigt sein, wobei die zweite Greiferanordnung 30 vorzugsweise unterhalb der ersten Greiferanordnung 20 angeordnet ist, wie dies in Fig. 10 gezeigt ist. As a further alternative to the two separate gripper movement mechanisms shown in FIG. 1 a rod mechanism can also be provided, as shown in FIG. 8 and 9 is shown. The two gripper assemblies 20 and 30 can be on one Gripper bracket 80 may be attached, the second gripper assembly 30 preferably is arranged below the first gripper arrangement 20, as shown in FIG. 10.

Die Halterung 80 ist an ihrem unteren Ende vorzugsweise über einen Drehzapfen 82 mit einer Druckluftzylinder-Halterung 84 und einem ersten Arm 90 des Stabmechanismus verbunden. An ihrem oberen Ende ist die Halterung 80 über einen Drehzapfen 88 (Fig. 9) mit einer Seite eines Hebels 94 des Stabmechanismus verbunden. Die andere Seite des Hebels 94 ist über einen Drehzapfen 95 mit einem Ende 93 eines zweiten Arms 92 verbunden. Der Drehzapfen 95 ist wiederum mit einem auf der Druckluftzylinder-Halterung 84 gelagerten Druckluftzylinder 96 verbunden.The holder 80 is preferably at its lower end via a pivot 82 an air cylinder bracket 84 and a first arm 90 of the rod mechanism connected. At its upper end, the holder 80 is connected via a pivot pin 88 (FIG. 9) connected to one side of a lever 94 of the rod mechanism. The other side of the Lever 94 is via a pivot 95 with one end 93 of a second arm 92 connected. The pivot 95 is in turn with a on the air cylinder bracket 84 stored compressed air cylinder 96 connected.

Die Arme 90 und 92 sind vorzugsweise an ihren Enden 98 bzw. 99 z. B. in einem Rahmen drehbar gelagert. Ein Betätigungsarm 100 zum Bewegen des ersten Arms 90 ist an einem Ende mit dem Ende 98 es ersten Arms 90 und am anderen Ende mit einem Druckluftzylinder 104 verbunden.The arms 90 and 92 are preferably at their ends 98 and 99 z. B. in a frame rotatably mounted. An operating arm 100 for moving the first arm 90 is on one End 98 of the first arm 90 and one end of the other Air cylinder 104 connected.

An der anderen Seite der Halterung 80 ist ein ähnlicher Stabmechanismus angeordnet.A similar rod mechanism is arranged on the other side of the holder 80.

Im Folgenden wird die Funktionsweise des Stabmechanismus erläutert. Die erste Greiferanordnung 20 ergreift eine Platte von einem Plattenvorrat. Der Druckluftzylinder 102 wird aktiviert, so dass der Arm 90 in der durch den Pfeil 108 angezeigten Richtung um sein Ende 98 gedreht wird. Dadurch wird die Greiferhalterung 80 abwärts in die Richtung des Pfeils 110 geschwenkt, so dass die Platte in der zuvor beschriebenen Weise gegen die Oberfläche des Gummituchzylinders bewegt und an dieser ausgerichtet wird. Anschließend wird die Platte von der zweiten Greiferanordnung 30 ergriffen und von der ersten Greiferanordnung 20 freigegeben. Danach wird der Druckluftzylinder 96 aktiviert, so dass die Greiferhalterung 80 in die Richtung des Pfeils 112 gedreht und die Plattenkante gegen die Klemmleiste bzw. die Oberfläche des Plattenzylinders bewegt wird. Durch Weiterbewegen der Greiferhalterung 80 springt die Platte in den Zylinderkanal oder -spalt ein und wird anschließend in der zuvor beschriebenen Weise axial ausgerichtet, vorzugsweise indem der gesamte Stabmechanismus über weitere, nicht gezeigte Aktuatoren, z. B. einen Pneumatikzylinder, axial bewegt wird. Im Anschluss daran wird die Plattenspannvorrichtung im Plattenzylinder aktiviert und die Platte von der Greiferanordnung 30 freigegeben. The operation of the rod mechanism is explained below. The first Gripper assembly 20 grips a plate from a plate supply. The compressed air cylinder 102 is activated so that arm 90 turns in the direction indicated by arrow 108 its end 98 is rotated. This will make the gripper bracket 80 down in the direction of the arrow 110 pivoted so that the plate against the Surface of the blanket cylinder is moved and aligned with this. Subsequently the plate is gripped by the second gripper arrangement 30 and by the first Gripper assembly 20 released. The compressed air cylinder 96 is then activated so that the gripper holder 80 rotated in the direction of arrow 112 and the plate edge against the terminal block or the surface of the plate cylinder is moved. By Moving the gripper holder 80 further, the plate jumps into the cylinder channel or gap and is then axially aligned in the manner described above, preferably by adding the entire rod mechanism over others not shown Actuators, e.g. B. a pneumatic cylinder is moved axially. Following that activated the plate clamping device in the plate cylinder and the plate from the Gripper assembly 30 released.

Zusätzlich zu seiner Funktion, die Platte in den Zylinderkanal oder -spalt zu bewegen, kann der zweite Druckluftzylinder 96 auch dazu eingesetzt werden, das Ergreifen neuer Platten von einem Plattenvorrat zu unterstützen.In addition to its function of moving the plate into the cylinder channel or gap The second air cylinder 96 can also be used to grip new plates to support from a plate stock.

Der Plattenzylinder 2 kann als ein Plattenzylinder mit schmalem Kanal oder Spalt ausgebildet sein, was im Sinne dieser Anmeldung bedeutet, dass der Zylinderkanal schmaler als ca. 0,635 cm (0,25 inches) ist. Gemäß der beschriebenen Ausführungsform wird der Gummituchzylinder zum Ausrichten der Platte eingesetzt. Es ist jedoch auch möglich, einen anderen an den Plattenzylinder angrenzenden Zylinder, z. B. eine Farbwalze oder Feuchtwalze, zum Ausrichten der Platte vor dem Einfügen in den Zylinderkanal einzusetzen. Auf den Gummituchzylinder ist vorzugsweise ein kanalloses Gummituch aufgebracht, wodurch sich der Vorteil ergibt, dass die Plattenkante während des Ausrichtens nicht in einen Gummituchkanal eintreten kann, was zu einem Fehler bei der Ausrichtung führen kann. Der Ausdruck "Greiferanordnung" bezeichnet in dieser Anmeldung mindestens einen Greifer, der dazu geeignet ist, im aktivierten Zustand die Druckplatte zu halten. The plate cylinder 2 can be used as a plate cylinder with a narrow channel or gap be trained, which means in the sense of this application that the cylinder channel is narrower than about 0.635 cm (0.25 inches). According to the described embodiment the blanket cylinder is used to align the plate. However, it is also possible another cylinder adjacent to the plate cylinder, e.g. B. an ink roller or dampening roller, for aligning the plate before inserting it into the cylinder channel use. On the blanket cylinder there is preferably a channelless blanket applied, which gives the advantage that the plate edge during the Alignment cannot enter a blanket channel, which leads to an error in the Alignment can result. The term "gripper arrangement" denotes in this Registration at least one gripper that is suitable for the activated in the To hold the pressure plate.

Liste der BezugszeichenList of reference numbers

11
Offset-DruckmaschineOffset printing machine
22
Plattenzylinderplate cylinder
33
oberer Gummituchzylinderupper blanket cylinder
44
unterer Gummituchzylinderlower blanket cylinder
55
PlattenspannvorrichtungPlate clamping device
66
PlattenklemmvorrichtungDisk clamp
77
Zwischenraumgap
1010
PlattenaufbringeinrichtungPlattenaufbringeinrichtung
2020
erste Greiferanordnungfirst gripper arrangement
2222
erster Greiferfirst gripper
2323
Greifergrab
2424
Greiferhalterunglooper holder
2626
erste Federfirst spring
2727
zweite Federsecond spring
2828
erste Führungsschienefirst guide rail
2929
Greifergrab
3030
zweite Greiferanordnungsecond gripper arrangement
3131
Greifergrab
3232
Greiferhalterunglooper holder
3333
zweite Führungsschienesecond guide rail
4040
Einfügevorrichtunginserter
6060
Druckplatteprinting plate
6262
Vorderkanteleading edge
6464
Hinterkantetrailing edge
8080
Greiferhalterunglooper holder
8282
Drehzapfenpivot
8484
Druckluftzylinder-HalterungCompressed air cylinder holder
8888
Drehzapfenpivot
9090
erster Armfirst arm
9292
zweiter Armsecond arm
9393
EndeThe End
9494
Hebellever
9595
Drehzapfenpivot
9696
DruckluftzylinderAir Cylinder
9898
EndeThe End
9999
EndeThe End
100100
Betätigungsarmactuating arm
102102
PlattenzylinderachsePlate cylinder axis
104104
DruckluftzylinderAir Cylinder
103103
GummituchzylinderachseBlanket cylinder axis
108108
Drehrichtungdirection of rotation
110110
Drehrichtungdirection of rotation
112112
Drehrichtungdirection of rotation

Claims (17)

  1. Method of automatically mounting a printing plate (60) to a plate cylinder (2) in a rotary printing press comprising the steps of
    inserting a first edge (62) of the printing plate (60) into a gap (7) formed in the plate cylinder (2), and
    wrapping the printing plate (60) around the plate cylinder (2),
    characterized by
    the step of
    aligning the first edge (62) of the printing plate (60) on the surface of a cylinder (3) adjacent to the plate cylinder (2).
  2. Method according to claim 1,
    characterized in that as the printing plate (60) is wrapped around the plate cylinder (2), the latter is rotated such that the printing plate (60) passes a nip formed between the plate cylinder (2) and the adjacent cylinder (3).
  3. Method according to one of the preceding claims,
    characterized in that the adjacent cylinder (3) is a blanket cylinder of a rotary offset printing press.
  4. Method according to one of the preceding claims,
    characterized in that the alignment of the first edge (62) of the printing plate (60) against the adjacent cylinder (3) is achieved by acting on the printing plate (60) with resilient means and moving the printing plate (60) into a substantially radial direction against the circumferential surface of the adjacent cylinder (3).
  5. Method according to one of the preceding claims,
    characterized in that the printing plate (60) is pivoted in a substantially tangential direction towards the plate cylinder (2) after the first edge (62) has been aligned against the adjacent cylinder (3).
  6. Method according to one of the preceding claims,
    characterized in that the printing plate (60) is displaced in the axial direction with respect to the plate cylinder (2) after the first edge (62) has been inserted into the gap (7) of the plate cylinder (2) in order to position the printing plate (60) on the plate cylinder (2).
  7. Method according to claim 6,
    characterized in that for the axial displacement, the printing plate (60) is acted on by resilient means (26, 27).
  8. Method according to one of the preceding claims,
    characterized in that for the alignment of the first edge (62), the printing plate (60) is held by a first set of grippers (20) and moved in the direction of the adjacent cylinder (3).
  9. Method according to claim 8,
    characterized in that after the first edge (62) has been aligned against the adjacent cylinder (3), the printing plate (60) is gripped by a second set of grippers (30) and moved in the direction of the gap (7) of the plate cylinder (2).
  10. Method according to claim 9,
    characterized in that the first set of grippers (20) releases the printing plate (60) after the latter has been gripped by the second set of grippers (30).
  11. Method according to claim 9 or 10,
    characterized in that the second set of grippers (30) moves the printing plate (60) away from the adjacent cylinder (3) towards the plate cylinder (2) such that the first edge (62) of the printing plate (60) rests against the plate cylinder (2).
  12. Device for mounting a printing plate (60) to a plate cylinder (2) comprising a first set of grippers (20) for gripping the printing plate (60) and for moving the printing plate (60) in the direction of a cylinder (3) adjacent to the plate cylinder (2), and a second set of grippers (30) for moving the printing plate (60) in the direction of a gap (7) formed in the plate cylinder (2),
    characterized in that resilient means (26, 27) apply a resilient force to the first set of grippers (20) in a direction that is substantially radial with respect to the cylinder (3) adjacent to the plate cylinder (2) to align the printing plate (60) against the surface of the cylinder (3) adjacent to the plate cylinder (2).
  13. Device according to claim 12,
    characterized in that the first set of grippers (20) is guided in a first track (28) that extends in a substantially radial direction with respect to the adjacent cylinder (3).
  14. Device according to one of claims 12 to 13,
    characterized in that the second set of grippers (30) is guided in a second track (33) that is arranged in a direction that is substantially radial with respect to the plate cylinder (2).
  15. Device according to one of claims 12 to 14,
    characterized in that the second set of grippers (30) is movable in a direction that is axial with respect to the plate cylinder (2).
  16. Device according to one of claims 12 to 15,
    characterized in that the first set of grippers (20) and/or the second set of grippers (30) comprises one or more suction grippers.
  17. Offset printing unit,
    characterized by
    a device according to one of claims 12 to 16.
EP00123303A 1999-11-22 2000-10-26 Method and device for automatic mounting a printing plate to a plate cylinder of a rotary press Expired - Lifetime EP1101612B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/444,801 US6460457B1 (en) 1999-11-22 1999-11-22 Method and device for automatically providing a printing plate to a plate cylinder
US444801 1999-11-22

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EP1101612A2 EP1101612A2 (en) 2001-05-23
EP1101612A3 EP1101612A3 (en) 2002-03-27
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EP (1) EP1101612B1 (en)
JP (1) JP4638587B2 (en)
AT (1) ATE285328T1 (en)
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Also Published As

Publication number Publication date
US20020157553A1 (en) 2002-10-31
EP1101612A3 (en) 2002-03-27
JP4638587B2 (en) 2011-02-23
DE50009015D1 (en) 2005-01-27
US6460457B1 (en) 2002-10-08
EP1101612A2 (en) 2001-05-23
ATE285328T1 (en) 2005-01-15
JP2001171086A (en) 2001-06-26

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