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EP0603246B1 - Device for removing and/or supplying printing plates of a printing machine - Google Patents

Device for removing and/or supplying printing plates of a printing machine Download PDF

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Publication number
EP0603246B1
EP0603246B1 EP92919011A EP92919011A EP0603246B1 EP 0603246 B1 EP0603246 B1 EP 0603246B1 EP 92919011 A EP92919011 A EP 92919011A EP 92919011 A EP92919011 A EP 92919011A EP 0603246 B1 EP0603246 B1 EP 0603246B1
Authority
EP
European Patent Office
Prior art keywords
printing
plate
cassette
printing plate
magazine
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
EP92919011A
Other languages
German (de)
French (fr)
Other versions
EP0603246A1 (en
Inventor
Hermann Beisel
Peter Theobald Blaser
Dieter Hauck
Rudolf Hutzenlaub
Helmut Friedrich JÄGER
Hans-Georg Jahn
Robert Müller
Anton Rodi
Nikolaus Spiegel
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0603246A1 publication Critical patent/EP0603246A1/en
Application granted granted Critical
Publication of EP0603246B1 publication Critical patent/EP0603246B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1206—Feeding to or removing from the forme cylinder

Definitions

  • the invention relates to a device designed as a magazine for removing or feeding printing plates from or to a printing plate cylinder of a printing press for an automatic printing plate change, with a plate removal device with first holding means and with a plate feed device.
  • a device of the type mentioned is known from European patent application 0 435 410. It serves to automate a printing plate change.
  • the magazine records old, used records.
  • the printing plate used is unclamped at one end on the printing plate cylinder and then - by appropriate rotation of the printing plate cylinder - partially inserted into the magazine.
  • the other end of the printing plate is then released from the clamping device of the printing plate cylinder and the entire printing plate is introduced into the magazine with a plate discharge device.
  • a new printing plate to be used is then removed from the magazine by means of the plate feed device.
  • one end of the printing plate is inserted into the corresponding clamping device of the printing plate cylinder and clamped there and then - by rotating the printing plate cylinder - the printing plate is completely pulled out of the magazine and around the outer surface of the printing plate cylinder. Then the other end of the pressure plate is clamped and there is a clamping in the circumferential direction.
  • the printing plate feed can be disrupted if, when a new printing plate is removed, at least one of the new printing plates stacked in the magazine also changes its position unintentionally.
  • a robot arm for automatic printing plate change which brings and assembles new printing plates from a magazine containing a plurality of printing plates to the plate cylinder, and removes old printing plates and stores them in a magazine for old printing plates, which holds several old printing plates.
  • the pressure plates are gripped by means of suction cups.
  • the magazines for old and new printing plates are attached to the base of the robot in such a way that the robot arm can reach them.
  • EP 0 435 413 is a method for plate removal and plate feeding, the most favorable angular position of the plate cylinder serving as the criterion for the sequence.
  • the invention has for its object to provide a device of the type mentioned, which enables a reliable supply of printing plates with a simple structure and small designs.
  • the characterizing part of claim 1 To feed a new printing plate to be used, it is removed from the magazine cassette, fed to the printing plate cylinder and clamped there. This process takes place fully automatically or semi-automatically with the aid of the plate feed device, the activation of the second holding means, which does not take place simultaneously but preferably over the length of the printing plate to be used, has the advantage that the printing plate to be used is separated from the stack located in the cassette new printing plates can be lifted off perfectly without - due to the flatness - another pressure plate is lifted or pushed out by forming a vacuum.
  • the second holding means are preferably designed as activatable second suction elements.
  • the second holding means are arranged on a second carriage which can be moved along a second guide. Furthermore, a sensor is arranged in the interior of the magazine, which monitors the printing plate to be used, in particular the rear edge thereof, for perfect feeding to the printing plate cylinder.
  • the second holding means assigned to the front edge of the new printing plate leave the printing plate, which is approximately in or in the clamping position, during the feeding process go or hold so loose that the printing plate is slidably held before the printing plate leading edge is clamped to the printing cylinder.
  • the purpose of this is that the pressure plate can align better when it is clamped.
  • the printing plate cylinder rotates and pulls the new printing plate completely out of the magazine cassette.
  • the suction members serving as holding means can be subjected to a weak vacuum, for example by means of a bypass, that the pressure plate slides on the suction members.
  • the angled pressure plate trailing edge approaches a suction row, it becomes inoperative and brackets ensure that the edge glides past. If the pressure plate is drawn in so far that the last row of suction cups has to be passed through, it has such a rigidity that, in order to avoid a collision, these holding means are controllably displaceable transversely to the pressure plate level when the pressure plate is fed to the pressure plate cylinder, so that they can be moved from the The rear edge of the printing plate, which is preferably angled, can be passed without problems, preferably without collisions.
  • the magazine has at least one pressure element that can be displaced radially to the printing plate cylinder by activation, in particular a pressure roller, in order to introduce the rear edge of the printing plate to be introduced into a clamping device of the printing plate cylinder, so that the clamping device is then closed and then tensioned by closing the clamping device the pressure plate can be done.
  • a depressing device which acts on the printing plates to be used which remain in the cassette transversely to their planes in order to prevent them from tipping out to prevent the cassette. This tilting out could otherwise occur in particular if the magazine is pivoted back into its vertical position after an automatic plate change has been carried out.
  • a cassette which holds the printing plates to be used and can be inserted into the magazine has spacers which are arranged between adjacent printing plates. These spacers prevent a vacuum from forming between the individual printing plates. They can be designed as plastic tongues. They can preferably be fixed on the cassette in the resting position.
  • a spacer (or several spacers) is thus first clipped onto the cassette in such a way that it is arranged on the surface of an inserted pressure plate. Only then is another new printing plate inserted in the cassette.
  • the spacers are so flexible that they dodge when removing an underlying pressure plate.
  • the printing unit 2 has a device designed as a magazine 4.
  • the magazine 4 which is provided in a printing press 3 with a plurality of printing units 2 on each printing unit 2 of the printing press 3, a printing plate that is to be used can only be fed in or an already used printing plate can only be removed (FIGS. 1 to 9).
  • the magazine 4 is in its starting position (vertical position). In this idle state, the magazine 4 is secured against tipping (locking). Normal machine operation (printing operation) is only possible in this lower, vertical position of magazine 4.
  • the magazine 4 has two receiving shafts 5 and 6, into each of which a cassette 7 or 8 can be inserted from above (FIG. 1).
  • the cassette 7 is used to to accommodate printing plates already used in the printing press 3.
  • the cassette 7 is designed such that it can accommodate several, for example five, printing plates used. These printing plates form a stack of printing plates in the interior of the cassette 7, that is to say the individual printing plates lie flat on one another.
  • the cassette 8 is used to hold new printing plates that are still to be used. It can also accommodate several, in particular five, printing plates at the same time, these printing plates also being assigned to one another over a large area. To remove the printing plates used, it is therefore only necessary to pull the cassette 7 out of the receiving shaft 5.
  • the cassette 8 can be equipped with new printing plates that are still to be used. If this has taken place, the cassette 8 is inserted into the receiving shaft 6 of the magazine 4, so that it is available for feeding to the printing plate cylinder 1 of the corresponding printing unit 2.
  • the individual positions of the magazine 4 which are assumed for removing and / or feeding printing plates are explained below. If a printing plate 9 to be used is to be fed to the printing plate cylinder 1, the magazine 4 moves - according to FIG. 2 - vertically upwards into a central position and then swivels - according to FIG. 3 - into an inclined position (for example about 45 °). The printing plate 9 to be used is then fed to the printing plate cylinder 1 and clamped thereon by means of a plate feed device of the magazine 4 to be explained in more detail (FIG. 4). The magazine 4 then pivots back into its vertical position and then lowers again into the lower position (starting position) according to FIG. 5.
  • the printing plate 10 used is then completely drawn into the cassette 7 by a plate discharge device of the magazine 4 to be described in more detail. Now the magazine 4 pivots back into its vertical position and then lowers - according to FIG. 9 - into the starting position.
  • FIGS. 10 and 11 the magazine 4 is shown in FIGS. 10 and 11 in a horizontal position relative to the side edges of the drawing sheet.
  • the positions shown in FIGS. 10 and 11 correspond to the inclined positions according to FIGS. 3, 4, 7 and 8.
  • the magazine 4 is constructed in layers. It has an outer layer 11 from which the cassette 7 is received. In a subsequent layer 12 is one of the above Cassette 7 associated plate removal device 13 housed. The cassette 8 is arranged in a subsequent layer 14. A further layer 15 receives a plate feed device 16 which interacts with the pressure plates 9 of the cassette 8.
  • the plate removal device 13 has first holding means 17, which are designed as activatable first suction elements 18.
  • the suction cups 19 of the first suction elements 18 can be extended in the direction of the pressure plates 10 (for the sake of clarity, only one pressure plate 9 or 10 is shown in FIGS. 10 and 11).
  • the first suction elements 18 are arranged on a first carriage 20 which can be moved along a first guide 21.
  • the guide 21 has two guide parts 22 which are spaced apart from one another and run parallel to one another and which are designed as guide rods 23.
  • the guide rods 23 are surrounded by guide parts 24 of the first carriage 20 with a slight play.
  • the first carriage 20 can be moved along the first guide 21 by means of a drive device 25.
  • the drive device 25 has a fixed, non-ferromagnetic tube 26 (for example an aluminum tube) which extends from the top to the bottom of the magazine 4. Inside the tube 26 there is a magnetic piston 27 which can be moved back and forth within the tube 26 by means of a pressure medium and can be positioned in the desired positions.
  • a suction element 18 is arranged on both sides of the drive device 25.
  • Each suction element 18 is fastened to a mist 30 which can be pivoted in the direction of the pressure plate 10 by means of a hinge 31.
  • the position of the levers 30 is determined by a positive control 32 (see also FIG. 13), which is formed by a roller 33 which is connected to each lever 30 and which runs in a stationary guide rail 34.
  • Each guide rail 34 has in the upper region of the magazine 4 a run-up slope 35 (FIG. 13), so that when the carriage 20 moves into an upper position, the rollers 33 run onto the run-up slopes 35 and thereby the lever 30 and thus the suction members 18 in the direction pivot onto the pressure plate 10.
  • Springs 115 serve to return the lever 30 and to rest the rollers 33 on the ramp 35.
  • actuatable hold-down devices 36 are arranged on opposite sides, which serve to act upon the pressure plate 10 in this area. Furthermore, 4 guide rollers 37, 38 and 39 are arranged in the lower region of the magazine.
  • the magazine 4 is first brought into the required inclined position, corresponding to FIGS. 6 and 7.
  • a rear edge clamping device 40 of the printing plate cylinder 1 then opens and releases the angled printing plate rear edge 41 clamped there.
  • the rear end of the pressure plate 10 strikes against the guide roller 37 (FIG. 13).
  • the printing plate 10 is pushed into the cassette 7 of the magazine 4.
  • the guide rollers 37, 38 and 39 help in inserting the trailing edge end of the printing plate 10.
  • Guide rails 116 can be arranged which are in cutouts in the Slide the pressure plate trailing edge 41. This insertion is shown in FIG. 13 with a dotted line and in FIG. 14 with an excellent line. If the pressure plate 10 has been moved approximately one third into the magazine 4, the suction elements 18 of the carriage 20 located in the lowest position within the magazine 4 are activated, that is to say the suction cups 19 move in the direction of the pressure plate 10 to be held and suck on the pressure plate 10.
  • the carriage 20 moves while simultaneously turning the printing plate cylinder 1 backwards into its upper position, as a result of which the printing plate 10 is completely drawn into the magazine 4.
  • the front edge 44 of the pressure plate 10 is also unclamped. If the carriage 20 reaches the upper end region of the magazine 4, the rollers 33 run onto the run-up slopes 35 and pivot the levers 30, so that - according to FIG. 15 - the angled pressure plate rear edge 41 comes under a retaining edge 43 of the cassette 7.
  • the hold-down devices 36 then press the pressure plate 10 down in the region of its front edge 44 (FIG. 16), so that the front edge 44 comes to lie lower than a holding edge 45 of the cassette 7.
  • the front edge 44 is then brought under the holding edge 45 by pulling down the pressure plate 10.
  • the printing plate 10 is thus securely arranged in the cassette 7.
  • the printing plates 10 used are removed from the magazine 4 in a simple manner by pulling the cassette 7 out of the associated receiving shaft 5.
  • FIG. 18 shows a longitudinal section through a cassette 7. It has a base 46, to which the upper and lower edge regions 47, 48, which are U-shaped, are connected.
  • the upper edge region 47 has a U-leg 49 and the lower edge region 48 has a U-leg 50, which forms the holding edge 45.
  • the length x of the U-leg 49 is greater than the length y of the U-leg 50.
  • the free distance between the ends of the U-legs 49 and 50 is selected such that a pressure plate 10 to be introduced is first pushed under the U-leg 49 and then pivoted into the interior of the cassette 7, the front edge 44 being the U-leg 50 happens.
  • the printing plate 10 is therefore securely accommodated in the interior of the cassette 7.
  • the procedure for removing a printing plate 9 from a cassette 8 is similar, provided that a cassette with rear grip edges is also used. However, it is also possible to use a design without a rear edge as the cassette 8.
  • Each cassette 7 or 8 has a handle 51 in its upper area in order to facilitate insertion and removal from the associated receiving shaft 5 or 6 of the magazine 4. Furthermore, the corresponding cassette 7 or 8 can also be moved more easily to the printing press by means of the handle 51 transport. Furthermore, each cassette 7 or 8 has an identification, in particular a color identification (this can be arranged, for example, on the handle 51), which is related to the associated printing unit 2 of the printing press 3. For example, the handle 51 can have a color that corresponds to the printing color of the associated printing unit 2. In this way, a clear assignment is given.
  • a color identification this can be arranged, for example, on the handle 51
  • the handle 51 can have a color that corresponds to the printing color of the associated printing unit 2. In this way, a clear assignment is given.
  • the spacers are preferably designed as plastic tongues. They can be clipped on preferably in a snap-fit seat in the edge areas.
  • spacers are designed as two rows of individual tongues, one tongue being placed on each side between two pressure plates when the pressure plates are inserted. It is expedient to arrange these tongues in the area of the front row of suckers which first comes into action.
  • spacers are first clipped in before another printing plate 9 is placed on a printing plate 9 already in the cassette 8. The spacers are like this flexible so that they dodge when removing the underlying pressure plate.
  • the magazine 4 In order to feed a printing plate 9 from the cassette 8 to the printing plate cylinder 1 by means of the plate feed device 16, the magazine 4 is - as already mentioned - in its inclined position in which support rollers 52 are supported on the bearer rings 53 assigned to the printing plate cylinder 1.
  • the plate feed device 16 has second holding means 55 on a second carriage 54, which are also designed as activatable suction members 56 (second suction members).
  • the suction members are - according to FIGS. 10 and 12 - each four of them in a row spaced apart, three rows being formed on the second carriage 54. Provision can also be made to equip the lower row of suction members 56 closest to the printing plate cylinder 1 with four suction members 56 and the remaining rows with three each.
  • the suction members 56 arranged in the lower row assigned to the printing plate cylinder 1 are fastened to levers 57 which can be pivoted about axes 58.
  • Pressure cylinders 59 are provided for actuating the levers 57; furthermore, the levers 57 are acted upon by a spring 60.
  • a preferably optically operating sensor 61 is arranged in the upper region of the magazine 4 and monitors the position of the associated pressure plate 9, in particular its position of the rear edge 41.
  • An activatable depressing device 62 for loading the pressure plates 9 is arranged between the upper and the middle row of suction elements.
  • the magazine also instructs 4 a displaceable pressure element 63, which is designed as a pressure roller 64 that can be displaced radially with respect to the printing plate cylinder 1.
  • the second carriage 54 can be moved along a second guide 66 (FIG. 12) by means of a piston / cylinder unit 65.
  • the second guide is formed by fixed profile rails 67, in which guide rollers 68 of the carriage 54 run.
  • the lowest suction members 56 assigned to the printing plate cylinder 1 can first come into operation, the levers 57 being in their undeflected position. Then the suction members 56 of the middle row of suckers and then the suction members 56 of the top row of suckers become active. Another order is conceivable, for example first the middle suction cups and then the ones on the edge. As a result of the activation of the rows of suction elements, which does not take place simultaneously, but is carried out one after the other, the new pressure plate 9 located at the top is raised in such a way that no or only a very slight vacuum forms to the further pressure plate 9 underneath. This ensures that only one pressure plate 9 is raised.
  • the aforementioned spacers can be arranged between the individual pressure plates 9, which additionally counteracts the formation of a vacuum. If the pressure plate 9 is raised, the carriage 54 is pushed in the direction of the pressure plate cylinder 1 by means of the piston / cylinder unit 65. The front edge 44 of the pressure plate 9 enters the front edge clamping device 69 of the pressure plate cylinder 1, which was previously positioned accordingly. In the ancestor of the carriage 54 described above, the angled pressure plate rear edge 41 slides under the sensor 61, which registers the correct transport of the pressure plate 9. During the carriage 54 carriage is a Bypass activated in the air supply of the suction of the suction members 56, since a strong suction air is only necessary for suction of the pressure plate 9.
  • the suction devices of the bottom and middle rows of the suction members 56 are pressureless or only subjected to a weak vacuum; the pressure plate 9 is therefore only held by the top row of suction cups.
  • the purpose of this is that the pressure plate 9 can align better.
  • the front edge clamping device 69 is closed, so that the front edge 44 of the pressure plate 9 is firmly clamped.
  • the printing plate cylinder 1 rotates in the forward direction and pulls the printing plate 9 onto its outer surface. Due to the bypass, the suction elements are only subjected to a slight negative pressure, so that they still hold the pressure plate, but this can be moved on the suction elements by the rotation of the plate cylinder.
  • brackets 70 ensure that the angled trailing edge glides past the suction elements without collision.
  • the pressure plate 9 Due to their proximity to the pressure plate cylinder 1, the pressure plate 9 is relatively rigid in the area of the lower row of suction elements 56, so that a lever 57, which is designed as a plate with a hinge and on which the entire row of suction devices is arranged, for passing the angled pressure plate rear edge 41, or several levers 57 are pivoted into their position shown in FIG. 10 by means of one or more cylinders 59, so that the pressure plate rear edge 41 can pass the row of suction cups without any problems.
  • the pressure roller 64 is then moved radially in the direction of the printing plate cylinder 1, as a result of which the angled printing plate rear edge 41 is pressed into the rear edge clamping device 40 of the printing plate cylinder 1.
  • the trailing edge clamping device 40 closes and then clamps the pressure plate corresponding shift in the circumferential direction of the printing plate cylinder 1. Then the carriage 54 moves back to its original position in order to capture the next printing plate 9 at the given tent point.
  • the device moves back to its original position by depressurizing the cylinders 59 so that the springs 60 can cause the lever (s) 57 to return to their original position. Then the depressing device 62 then comes into action, which ensures that the remaining printing plates 9 remain clean in the cassette 8 and cannot tip out, in particular when the magazine 4 is pivoted back into its vertical position.
  • FIG. 10 shows that elastic brackets 70 are associated with the upper and middle rows of the suction members 56.
  • the elasticity of the brackets 70 allows the pressure plate 9 to be used to be sucked in, that is to say the brackets 70 do not interfere with this process.
  • the brackets 70 ensure that the angled pressure plate rear edge 41 does not get caught on the suction elements of the suction elements 56.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Screen Printers (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)

Abstract

PCT No. PCT/EP92/02056 Sec. 371 Date May 12, 1994 Sec. 102(e) Date May 12, 1994 PCT Filed Sep. 7, 1992 PCT Pub. No. WO93/04863 PCT Pub. Date Mar. 18, 1993.A device in the form a magazine is disclosed for carrying away used printing plates from the plate cylinder of a printing machine. The device applies in particular to the automatic exchange of printing plates. The device has an arrangement for carrying away the plates with (first) holders for each printing plate capable of being activated. The (first) holders are arranged on a (first) carriage that can be moved along a (first) guide substantially over the whole length of the device, inside the magazine.

Description

Die Erfindung betrifft eine als Magazin ausgebildete Vorrichtung zum Ab- bzw. Zuführen von Druckplatten von bzw. zu einem Druckplattenzylinder einer Druckmaschine für einen automatischen Druckplattenwechsel, mit einer Plattenabführeinrichtung mit ersten Haltemitteln und mit einer Plattenzuführeinrichtung.The invention relates to a device designed as a magazine for removing or feeding printing plates from or to a printing plate cylinder of a printing press for an automatic printing plate change, with a plate removal device with first holding means and with a plate feed device.

Eine Vorrichtung der eingangs genannten Art ist aus der europäischen Patentanmeldung 0 435 410 bekannt. Sie dient der Automatisierung eines Druckplattenwechsels. Das Magazin nimmt alte, verwendete Platten auf. Zum Abführen wird die verwendete Druckplatte einendig am Druckplattenzylinder losgespannt und dann - durch entsprechende Drehung des Druckplattenzylinders - in das Magazin teilweise eingeschoben. Anschließend wird das andere Ende der Druckplatte von der Spannvorrichtung des Druckplattenzylinders freigegeben und die gesamte Druckplatte mit einer Plattenabführeinrichtung in das Magazin eingebracht. Anschließend wird dann eine neue, zu verwendende Druckplatte dem Magazin mittels der Plattenzuführeinrichtung entnommen. Dabei wird zunächst das eine Ende der Druckplatte in die entsprechende Klemmvorrichtung des Druckplattenzylinders eingesteckt und dort festgeklemmt und dann - durch Drehung des Druckplattenzylinders - die Druckplatte vollständig aus dem Magazin heraus- und um die Mantelfläche des Druckplattenzylinders herumgezogen. Dann wird das andere Ende der Druckplatte eingespannt und es erfolgt ein Spannen in Umfangsrichtung. Die Druckplattenzuführung kann gestört werden, wenn bei der Entnahme einer neuen Druckplatte mindestens eine weitere der im Magazin gestapelt aufgenommenen neuen Druckplatten ihre Position ungewollt mitverändert.A device of the type mentioned is known from European patent application 0 435 410. It serves to automate a printing plate change. The magazine records old, used records. For removal, the printing plate used is unclamped at one end on the printing plate cylinder and then - by appropriate rotation of the printing plate cylinder - partially inserted into the magazine. The other end of the printing plate is then released from the clamping device of the printing plate cylinder and the entire printing plate is introduced into the magazine with a plate discharge device. Then a new printing plate to be used is then removed from the magazine by means of the plate feed device. First, one end of the printing plate is inserted into the corresponding clamping device of the printing plate cylinder and clamped there and then - by rotating the printing plate cylinder - the printing plate is completely pulled out of the magazine and around the outer surface of the printing plate cylinder. Then the other end of the pressure plate is clamped and there is a clamping in the circumferential direction. The printing plate feed can be disrupted if, when a new printing plate is removed, at least one of the new printing plates stacked in the magazine also changes its position unintentionally.

Aus der Schrift US 4,727,807 ist ein Roboterarm für den automatischen Druckplattenwechsel bekannt, der neue Druckplatten aus einem mehrere Druckplatten enthaltenen Magazin zum Plattenzylinder bringt und montiert, sowie alte Druckplatten entfernt und in einem Magazin für alte Druckplatten, das mehrere alte druckplatten aufnimmt, ablegt. Das Ergreifen der Druckplatten erfolgt mittels Saugnäpfen. Die Magazine für alte und neue Druckplatten sind am Fuß des Roboters derart angebracht, daß der Roboterarm diese erreichen kann.From the document US 4,727,807 a robot arm for automatic printing plate change is known, which brings and assembles new printing plates from a magazine containing a plurality of printing plates to the plate cylinder, and removes old printing plates and stores them in a magazine for old printing plates, which holds several old printing plates. The pressure plates are gripped by means of suction cups. The magazines for old and new printing plates are attached to the base of the robot in such a way that the robot arm can reach them.

Bei der EP 0 435 413 handelt es sich um ein Verfahren zur Plattenentfernung und Plattenzufuhr, wobei als Kriterium für die Reihenfolge die günstigste Winkelstellung der Plattenzylinder dient.EP 0 435 413 is a method for plate removal and plate feeding, the most favorable angular position of the plate cylinder serving as the criterion for the sequence.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art zu schaffen, die bei einfachem Aufbau sowie kleiner Bauformen ein funktionssicheres Zuführen von Druckplatten ermöglicht.The invention has for its object to provide a device of the type mentioned, which enables a reliable supply of printing plates with a simple structure and small designs.

Diese Aufgabe wird erfindungsgemäß durch das Kennzeichen von Anspruch 1 gelöst
Zum Zuführen einer neuen, zu verwendenden Druckplatte wird diese der Kassette des Magazins entnommen, dem Druckplattenzylinder zugeführt und dort aufgespannt. Dieser Vorgang erfolgt vollautomatisch oder auch halbautomatisch unter Zuhilfenahme der Plattenzuführeinrichtung, wobei das nicht gleichzeitig erfolgende, sondern vorzugsweise über die Länge der zu verwendenden Druckplatte nacheinander vorgenommene Aktivieren der zweiten Haltemittel den Vorteil hat, daß sich die einzusetzende Druckplatte von dem sich in der Kassette befindlichen Stapel neuer Druckplatten einwandfrei abheben läßt, ohne daß - aufgrund der Planlage - eine weitere Druckplatte durch Bildung eines Unterdrucks mit angehoben oder herausgeschoben wird. Bevorzugt sind die zweiten Haltemittel als aktivierbare zweite Saugorgane ausgebildet.This object is achieved by the characterizing part of claim 1
To feed a new printing plate to be used, it is removed from the magazine cassette, fed to the printing plate cylinder and clamped there. This process takes place fully automatically or semi-automatically with the aid of the plate feed device, the activation of the second holding means, which does not take place simultaneously but preferably over the length of the printing plate to be used, has the advantage that the printing plate to be used is separated from the stack located in the cassette new printing plates can be lifted off perfectly without - due to the flatness - another pressure plate is lifted or pushed out by forming a vacuum. The second holding means are preferably designed as activatable second suction elements.

Vorteilhaft ist es, wenn die zweiten Haltemittel an einem zweiten Wagen angeordnet sind, der entlang einer zweiten Führung verfahrbar ist. Ferner ist im Inneren des Magazins ein Sensor angeordnet, der die zu verwendende Druckplatte, insbesondere deren Hinterkante, auf einwandfreie Zuführung zum Druckplattenzylinder überwacht.It is advantageous if the second holding means are arranged on a second carriage which can be moved along a second guide. Furthermore, a sensor is arranged in the interior of the magazine, which monitors the printing plate to be used, in particular the rear edge thereof, for perfect feeding to the printing plate cylinder.

Die der Vorderkante der neuen Druckplatte zugeordneten zweiten Haltemittel lassen während des Zuführvorgangs die sich etwa in oder in Spannposition befindliche Druckplatte los oder halten so locker, daß die Druckplatte verschiebbar festgehalten ist, bevor die Druckplattenvorderkante am Druckzylinder festgespannt wird. Dies hat den Zweck, daß sich die Druckplatte beim Einspannen besser ausrichten kann. Nach dem Einspannen der Vorderkante dreht sich der Druckplattenzylinder und zieht die neue Druckplatte aus der Kassette des Magazins vollständig heraus. Sowohl für das Ausrichten der Druckplatte, wie für das Herausziehen können die als Haltemittel dienenden Saugorgane zum Beispiel mittels eines Bypasses mit einem so schwachen Unterdruck beaufschlagt werden, daß die Druckplatte auf den Saugorganen gleitet.The second holding means assigned to the front edge of the new printing plate leave the printing plate, which is approximately in or in the clamping position, during the feeding process go or hold so loose that the printing plate is slidably held before the printing plate leading edge is clamped to the printing cylinder. The purpose of this is that the pressure plate can align better when it is clamped. After the front edge has been clamped in, the printing plate cylinder rotates and pulls the new printing plate completely out of the magazine cassette. Both for aligning the pressure plate and for pulling out, the suction members serving as holding means can be subjected to a weak vacuum, for example by means of a bypass, that the pressure plate slides on the suction members.

Nähert sich die abgewinkelte Druckplattenhinterkante einer Saugreihe, tritt diese außer Funktion und Bügel sorgen für das Vorbeigleiten der Kante. Ist die Druckplatte so weit eingezogen, daß die letzte Saugerreihe passiert werden muß, so weist sie eine derartige Steifigkeit auf, daß um eine Kollision zu vermeiden, diese Haltemittel beim Zuführen der Druckplatte zum Druckplattenzylinder quer zur Druckplattenebene steuerbar verlagerbar sind, so daß sie von der Hinterkante der Druckplatte, die vorzugsweise abgewinkelt ist, einwandfrei, vorzugsweise kollisionsfrei, passiert werden können.If the angled pressure plate trailing edge approaches a suction row, it becomes inoperative and brackets ensure that the edge glides past. If the pressure plate is drawn in so far that the last row of suction cups has to be passed through, it has such a rigidity that, in order to avoid a collision, these holding means are controllably displaceable transversely to the pressure plate level when the pressure plate is fed to the pressure plate cylinder, so that they can be moved from the The rear edge of the printing plate, which is preferably angled, can be passed without problems, preferably without collisions.

Ferner ist es vorteilhaft, wenn das Magazin mindestens ein radial zum Druckplattenzylinder durch Aktivierung verlagerbares Andrückelement, insbesondere eine Andrückrolle, aufweist, um die Hinterkante der einzubringenden Druckplatte in eine Klemmvorrichtung des Druckplattenzylinders einzubringen, so daß dann durch Schließen der Klemmvorrichtung das Festlegen und anschließend das Spannen der Druckplatte erfolgen kann.It is also advantageous if the magazine has at least one pressure element that can be displaced radially to the printing plate cylinder by activation, in particular a pressure roller, in order to introduce the rear edge of the printing plate to be introduced into a clamping device of the printing plate cylinder, so that the clamping device is then closed and then tensioned by closing the clamping device the pressure plate can be done.

Überdies ist eine Niederdrückvorrichtung vorteilhaft, die die zu verwendenden, in der Kassette verbleibenden Druckplatten quer zu ihren Ebenen beaufschlagt, um ein Herauskippen aus der Kassette zu verhindern. Dieses Herauskippen könnte sonst insbesondere dann erfolgen, wenn das Magazin nach Durchführung eines automatischen Plattenwechsels wieder in seine vertikale Lage zurückgeschwenkt wird.In addition, a depressing device is advantageous which acts on the printing plates to be used which remain in the cassette transversely to their planes in order to prevent them from tipping out to prevent the cassette. This tilting out could otherwise occur in particular if the magazine is pivoted back into its vertical position after an automatic plate change has been carried out.

Vorstehend wurde bereits erläutert, daß das Abheben einer neuen, zu verwendenden Druckplatte von dem Druckplattenstapel im Innern der Kassette nicht über die gesamte Fläche gleichzeitig, sondern derart versetzt erfolgt, daß Luft zwischen die Platten gelangen kann, um ein "Aneinanderkleben" der Druckplatten zu vermeiden. Beispielsweise kann das Ansaugen durch die hintere, oben liegende Saugerreihe zuerst erfolgen, danach durch die mittlere und zuletzt durch die untere Reihe von Saugorganen. Vorzugsweise kann überdies vorgesehen sein, daß eine die zu verwendenden Druckplatten aufnehmende Kassette, die in das Magazin einsetzbar ist, Abstandshalter aufweist, die zwischen jeweils benachbarten Druckplatten angeordnet sind. Diese Abstandshalter verhindern, daß sich ein Vakuum zwischen den einzelnen Druckplatten bildet. Sie können als Kunststoffzungen ausgebildet sein. Vorzugsweise sind sie an der Kassette im Rastsitz festlegbar. Beim Füllen einer Kassette wird somit zunächst ein Abstandshalter (oder mehrere Abstandshalter) derart an der Kassette eingeklipst, daß er auf der Fläche einer einliegenden Druckplatte angeordnet ist. Erst dann wird eine weitere neue Druckplatte in die Kassette eingelegt. Die Abstandshalter sind derart flexibel, daß sie beim Herausnehmen einer darunterliegenden Druckplatte ausweichen.It has already been explained above that the lifting of a new printing plate to be used from the printing plate stack inside the cassette does not take place over the entire area at the same time, but is offset such that air can get between the plates in order to avoid "sticking" of the printing plates . For example, suction can take place first through the rear, upper row of suction devices, then through the middle and finally through the lower row of suction devices. In addition, it can preferably be provided that a cassette which holds the printing plates to be used and can be inserted into the magazine has spacers which are arranged between adjacent printing plates. These spacers prevent a vacuum from forming between the individual printing plates. They can be designed as plastic tongues. They can preferably be fixed on the cassette in the resting position. When filling a cassette, a spacer (or several spacers) is thus first clipped onto the cassette in such a way that it is arranged on the surface of an inserted pressure plate. Only then is another new printing plate inserted in the cassette. The spacers are so flexible that they dodge when removing an underlying pressure plate.

Die Zeichnung veranschaulicht die Erfindung anhand eines Ausführungsbeispiels und zwar zeigt:

Figur 1
ein Druckwerk einer Druckmaschine in schematischer Darstellung mit einem sich in Ausgangsposition befindlichen Magazin,
Figur 2
das Magazin der Figur 1 in einer Mittelposition,
Figur 3
das Magazin in Plattenwechselposition bei der Zuführung einer neuen, zu gebrauchen den Druckplatte zum Druckplattenzylinder der Druckmaschine,
Figur 4
eine Darstellung gemäß Figur 3, wobei die Druckplatte jedoch bereits auf den Druck plattenzylinder aufgespannt ist,
Figur 5
die Rückführung des Magazins in die Aus gangsposition,
Figur 6
das Anfahren der Mittelposition, um eine verwendete Druckplatte aufzunehmen,
Figur 7
das Magazin in Plattenwechselposition bei Aufnahme der verwendeten Druckplatte,
Figur 8
eine der Figur 7 entsprechende Darstellung, wobei sich die Druckplatte jedoch bereits vollständig in einer Kassette des Magazins befindet,
Figur 9
das Magazin wiederum in Ausgangsposition,
Figur 10
einen Längsschnitt durch das Magazin,
Figur 11
einen Längsschnitt durch das Magazin gemäß Figur 10, jedoch in einer anderen Ebene,
Figur 12
ein Querschnitt durch das Magazin,
Figur 13
eine schematische Ansicht im Längsschnitt beim Zuführen einer verwendeten Druckplatte zum Magazin,
Figur 14
eine der Figur 13 entsprechende Darstellung, jedoch mit weiter eingeführter Druckplatte,
Figur 15
das Magazin im Längsschnitt mit vollständig eingeführter Druckplatte,
Figur 16
eine der Figur 15 entsprechende Darstellung, jedoch im Zustand des Einbringens der Vorderkante der Druckplatte in eine Kassette des Magazins,
Figur 17
einen Querschnitt durch das Magazin im Bereich einer Plattenabführeinrichtung und
Figur 18
einen Längsschnitt durch die Kassette.
The drawing illustrates the invention using an exemplary embodiment and shows:
Figure 1
a printing unit of a printing press in a schematic representation with a magazine located in the starting position,
Figure 2
the magazine of Figure 1 in a middle position,
Figure 3
the magazine in the plate changing position when feeding a new one, to use the printing plate to the printing plate cylinder of the printing machine,
Figure 4
a representation according to Figure 3, but the printing plate is already clamped on the printing plate cylinder,
Figure 5
the return of the magazine to the starting position,
Figure 6
moving to the middle position to pick up a used printing plate,
Figure 7
the magazine in plate change position when the printing plate used is picked up,
Figure 8
7 shows a representation corresponding to FIG. 7, but the printing plate is already completely in a cassette of the magazine,
Figure 9
the magazine again in the starting position,
Figure 10
a longitudinal section through the magazine,
Figure 11
10 shows a longitudinal section through the magazine according to FIG. 10, but in a different plane,
Figure 12
a cross section through the magazine,
Figure 13
1 shows a schematic view in longitudinal section when feeding a printing plate used to the magazine,
Figure 14
13 shows a representation corresponding to FIG. 13, but with the printing plate introduced further,
Figure 15
the magazine in longitudinal section with the pressure plate fully inserted,
Figure 16
15 shows a representation corresponding to FIG. 15, but in the state in which the front edge of the printing plate is inserted into a cassette of the magazine,
Figure 17
a cross section through the magazine in the area of a plate removal device and
Figure 18
a longitudinal section through the cassette.

Für einen automatischen oder halbautomatischen Druckplattenwechsel, das heißt, zum Abführen einer alten, verwendeten Druckplatte und nachfolgendem Zuführen einer neuen, zu verwendenden Druckplatte zum Druckplattenzylinder 1 eines Druckwerks 2 einer Druckmaschine 3 weist das Druckwerk 2 eine als Magazin 4 ausgebildete Vorrichtung auf. Mit dem Magazin 4, das bei einer Druckmaschine 3 mit mehreren Druckwerken 2 an jedem Druckwerk 2 der Druckmaschine 3 vorgesehen ist, kann eine neu zu verwendende Druckplatte auch nur lediglich zugeführt oder eine bereits verwendete Druckplatte lediglich abgeführt werden (Figuren 1 bis 9).For an automatic or semi-automatic printing plate change, that is, for removing an old, used printing plate and subsequently feeding a new, used printing plate to the printing plate cylinder 1 of a printing unit 2 of a printing machine 3, the printing unit 2 has a device designed as a magazine 4. With the magazine 4, which is provided in a printing press 3 with a plurality of printing units 2 on each printing unit 2 of the printing press 3, a printing plate that is to be used can only be fed in or an already used printing plate can only be removed (FIGS. 1 to 9).

In Figur 1 befindet sich das Magazin 4 in seiner Ausgangsposition (senkrechte Position). In diesem Ruhezustand ist das Magazin 4 gegen Kippen gesichert (Verriegelung). Der normale Maschinenlauf (Druckbetrieb) ist nur in dieser unteren, vertikalen Position des Magazins 4 möglich.In Figure 1, the magazine 4 is in its starting position (vertical position). In this idle state, the magazine 4 is secured against tipping (locking). Normal machine operation (printing operation) is only possible in this lower, vertical position of magazine 4.

Das Magazin 4 weist zwei Aufnahmeschächte 5 und 6 auf, in die jeweils eine Kassette 7 beziehungsweise 8 von oben her einschiebbar ist (Figur 1). Die Kassette 7 dient dazu, alte, in der Druckmaschine 3 bereits verwendete Druckplatten aufzunehmen. Die Kassette 7 ist derart ausgebildet, daß sie mehrere, zum Beispiel fünf, verwendete Druckplatten aufnehmen kann. Diese Druckplatten bilden im Innern der Kassette 7 einen Druckplattenstapel, das heißt, die einzelnen Druckplatten liegen flächig aufeinander. Die Kassette 8 dient der Aufnahme, neuer, noch zu verwendender Druckplatten. Auch sie kann mehrere, insbesondere fünf Druckplatten gleichzeitig aufnehmen, wobei auch diese Druckplatten einander flächig zugeordnet sind. Zum Entnehmen der verwendeten Druckplatten ist es somit lediglich erforderlich, die Kassette 7 aus dem Aufnahmeschacht 5 herauszuziehen. Außerhalb der Druckmaschine 3 kann die Kassette 8 mit neuen, noch zu verwendenden Druckplatten bestückt werden. Ist dies erfolgt, so wird die Kassette 8 in den Aufnahmeschacht 6 des Magazins 4 eingeschoben, so daß sie für ein Zuführen zum Druckplattenzylinder 1 des entsprechenden Druckwerks 2 zur Verfügung stehen.The magazine 4 has two receiving shafts 5 and 6, into each of which a cassette 7 or 8 can be inserted from above (FIG. 1). The cassette 7 is used to to accommodate printing plates already used in the printing press 3. The cassette 7 is designed such that it can accommodate several, for example five, printing plates used. These printing plates form a stack of printing plates in the interior of the cassette 7, that is to say the individual printing plates lie flat on one another. The cassette 8 is used to hold new printing plates that are still to be used. It can also accommodate several, in particular five, printing plates at the same time, these printing plates also being assigned to one another over a large area. To remove the printing plates used, it is therefore only necessary to pull the cassette 7 out of the receiving shaft 5. Outside the printing machine 3, the cassette 8 can be equipped with new printing plates that are still to be used. If this has taken place, the cassette 8 is inserted into the receiving shaft 6 of the magazine 4, so that it is available for feeding to the printing plate cylinder 1 of the corresponding printing unit 2.

Nachfolgend werden die einzelnen Positionen des Magazins 4 erläutert, die für ein Ab- und/oder Zuführen von Druckplatten eingenommen werden. Soll dem Druckplattenzylinder 1 eine zu verwendende Druckplatte 9 zugeführt werden, so fährt das Magazin 4 - gemäß Figur 2 - senkrecht nach oben in eine Mittelposition und verschwenkt dann - gemäß Figur 3 - in eine Schrägstellung (zum Beispiel etwa 45°). Mittels einer noch näher zu erläuternden Plattenzuführeinrichtung des Magazins 4 wird dann die zu verwendende Druckplatte 9 dem Druckplattenzylinder 1 zugeführt und auf diesen aufgespannt (Figur 4). Anschließend verschwenkt das Magazin 4 dann wieder in seine vertikale Stellung und senkt dann wieder in die untere Position (Ausgangsposition) gemäß Figur 5 ab.The individual positions of the magazine 4 which are assumed for removing and / or feeding printing plates are explained below. If a printing plate 9 to be used is to be fed to the printing plate cylinder 1, the magazine 4 moves - according to FIG. 2 - vertically upwards into a central position and then swivels - according to FIG. 3 - into an inclined position (for example about 45 °). The printing plate 9 to be used is then fed to the printing plate cylinder 1 and clamped thereon by means of a plate feed device of the magazine 4 to be explained in more detail (FIG. 4). The magazine 4 then pivots back into its vertical position and then lowers again into the lower position (starting position) according to FIG. 5.

Nunmehr kann der Druckprozeß durchgeführt werden. Ist der Druckauftrag erledigt, so ist die Druckplatte 9 vom Druckplattenzylinder 1 zu entfernen. Hierzu hebt eine Hubvorrichtung das Magazin 4 wiederum in die Mittelposition (Figur 6). Anschließend erfolgt - gemäß Figur 7 - ein Verschwenken in die Schrägstellung und es wird - durch Ausspannen der Plattenhinterkante und Rückwärtsdrehen des Druckplattenzyllnders 1 - die verwendete Druckplatte 10 teilweise in das Magazin 4 eingeschoben (Figur 7).The printing process can now be carried out. When the print job has been completed, the printing plate 9 must be removed from the printing plate cylinder 1. To do this, lift one Lifting device, the magazine 4 again in the middle position (Figure 6). This is followed - according to FIG. 7 - by pivoting into the inclined position and - by unclamping the rear edge of the plate and turning the printing plate cylinder 1 backwards - the printing plate 10 used is partially pushed into the magazine 4 (FIG. 7).

Gemäß Figur 8 wird die verwendete Druckplatte 10 dann vollständig durch eine noch näher zu beschreibende Plattenabführeinrichtung des Magazins 4 vollständig in die Kassette 7 eingezogen. Nunmehr verschwenkt das Magazin 4 wieder in seine senkrechte Position und senkt dann - gemäß Figur 9 - in die Ausgangsposition ab.According to FIG. 8, the printing plate 10 used is then completely drawn into the cassette 7 by a plate discharge device of the magazine 4 to be described in more detail. Now the magazine 4 pivots back into its vertical position and then lowers - according to FIG. 9 - into the starting position.

Selbstverständlich ist es auch möglich, daß Ab- und Zuführen von Druckplatten zu kombinieren, um einen Druckplattenwechsel herbeizuführen. Dies bedeutet, daß in der Schrägstellung zunächst eine verwendete Druckplatte 10 vom Magazin 4 aufgenommen und eine neue, zu verwendende Druckplatte dann dem Druckplattenzylinder 1 zugeführt wird. Ist dies erfolgt, so schwenkt das Magazin 4 in die Vertikale zurück und senkt in die Ausgangsposition ab.Of course, it is also possible to combine the removal and supply of printing plates in order to change the printing plates. This means that in the inclined position, a printing plate 10 used is first picked up by the magazine 4 and a new printing plate to be used is then fed to the printing plate cylinder 1. If this has taken place, the magazine 4 swings back into the vertical and lowers into the starting position.

Die Konstruktion des Magazins 4 soll nachfolgend anhand der Figuren 10 bis 12 näher erläutert werden.The construction of the magazine 4 will be explained in more detail below with reference to FIGS. 10 to 12.

Das Magazin 4 ist aus zeichentechnischen Gründen in den Figuren 10 und 11 in horizontaler Position relativ zu den Seitenrändern des Zeichnungsblattes wiedergegeben. Es sei jedoch darauf hingewiesen, daß die in den Figuren 10 und 11 gezeigten Stellungen den Schrägstellungen gemäß der Figuren 3, 4, 7 sowie 8 entspricht.For technical reasons, the magazine 4 is shown in FIGS. 10 and 11 in a horizontal position relative to the side edges of the drawing sheet. However, it should be pointed out that the positions shown in FIGS. 10 and 11 correspond to the inclined positions according to FIGS. 3, 4, 7 and 8.

Das Magazin 4 ist schichtförmig aufgebaut. Es weist eine äußere Schicht 11 auf, von der die Kassette 7 aufgenommen wird. In einer folgenden Schicht 12 ist eine der vorstehenden Kassette 7 zugeordnete Plattenabführeinrichtung 13 untergebracht. In einer folgenden Schicht 14 ist die Kassette 8 angeordnet. Eine weiter folgende Schicht 15 nimmt eine Plattenzuführeinrichtung 16 auf, die mit den Druckplatten 9 der Kassette 8 zusammenwirkt.The magazine 4 is constructed in layers. It has an outer layer 11 from which the cassette 7 is received. In a subsequent layer 12 is one of the above Cassette 7 associated plate removal device 13 housed. The cassette 8 is arranged in a subsequent layer 14. A further layer 15 receives a plate feed device 16 which interacts with the pressure plates 9 of the cassette 8.

Die Plattenabführeinrichtung 13 weist erste Haltemittel 17 auf, die als aktivierbare erste Saugorgane 18 ausgebildet sind. Die Saugnäpfe 19 der ersten Saugorgane 18 lassen sich in Richtung auf die Druckplatten 10 ausfahren (in den Figuren 10 und 11 sind - der übersichtlichkeit halber - nur jeweils eine Druckplatte 9 beziehungsweise 10 dargestellt). Die ersten Saugorgane 18 sind an einem ersten Wagen 20 angeordnet, der entlang einer ersten Führung 21 verfahrbar ist. Gemäß Figur 17 weist die Führung 21 zwei voneinander beabstandete, parallel zueinanderverlaufende Führungsteile 22 auf, die als Führungsstangen 23 ausgebildet sind. Die Führungsstangen 23 werden von Führungsteilen 24 des ersten Wagens 20 mit geringfügigem Spiel umgriffen.The plate removal device 13 has first holding means 17, which are designed as activatable first suction elements 18. The suction cups 19 of the first suction elements 18 can be extended in the direction of the pressure plates 10 (for the sake of clarity, only one pressure plate 9 or 10 is shown in FIGS. 10 and 11). The first suction elements 18 are arranged on a first carriage 20 which can be moved along a first guide 21. According to FIG. 17, the guide 21 has two guide parts 22 which are spaced apart from one another and run parallel to one another and which are designed as guide rods 23. The guide rods 23 are surrounded by guide parts 24 of the first carriage 20 with a slight play.

Der erste Wagen 20 ist mittels einer Antriebseinrichtung 25 entlang der ersten Führung 21 verfahrbar. Die Antriebseinrichtung 25 weist ein feststehendes, nicht ferromagnetisches Rohr 26 (zum Beispiel ein Aluminiumrohr) auf, das sich von der Ober- bis zur Unterseite des Magazins 4 erstreckt. Im Innern des Rohres 26 befindet sich ein magnetischer Kolben 27, der mittels eines Druckmediums innerhalb des Rohrs 26 hin- und herbewegbar sowie in gewünschten Stellungen positionierbar ist. Am ersten Wagen 20 befindet sich ein ferromagnetisches Bauteil, das als Stahlring 29 ausgebildet ist. Eine Bewegung des magnetischen Kolbens 27 hat daher die Wirkung, daß über das magnetische Feld der Stahlring 29 und damit der Wagen 20 mitgenommen wird. Aufgrund dieser Konstruktion liegt eine flexible Kopplung vor und überdies ist der Wagen aus einer ganz oben im Magazin 4 befindlichen Stellung (in Figur 10 mit durchgezogenen Linien dargestellt) in eine ganz unten liegende Stellung (in Figur 10 mit gestrichelten Linien dargestellt) verfahrbar.The first carriage 20 can be moved along the first guide 21 by means of a drive device 25. The drive device 25 has a fixed, non-ferromagnetic tube 26 (for example an aluminum tube) which extends from the top to the bottom of the magazine 4. Inside the tube 26 there is a magnetic piston 27 which can be moved back and forth within the tube 26 by means of a pressure medium and can be positioned in the desired positions. There is a ferromagnetic component on the first carriage 20, which is designed as a steel ring 29. Movement of the magnetic piston 27 therefore has the effect that the steel ring 29 and thus the carriage 20 are taken along via the magnetic field. Because of this construction, there is a flexible coupling and, moreover, the carriage is from a position at the top in magazine 4 (in FIG. 10 with shown by solid lines) in a position at the very bottom (shown in FIG. 10 with dashed lines).

Gemäß Figur 17 sind beidseitig der Antriebseinrichtung 25 jeweils ein Saugorgan 18 angeordnet. Jedes Saugorgan 18 ist an einem Nebel 30 befestigt, der mittels eines Scharniers 31 in Richtung auf die Druckplatte 10 verschwenkbar ist. Die Stellung der Hebel 30 ist von einer Zwangssteuerung 32 bestimmt (siehe auch Figur 13), die von einer mit jedem Hebel 30 in Verbindung stehenden Rolle 33 gebildet ist, welche in einer ortsfesten Führungsschiene 34 läuft. Jede Führungsschiene 34 weist im oberen Bereich des Magazins 4 eine Auflaufschräge 35 (Figur 13) auf, so daß bei sich in eine obere Stellung bewegenden Wagen 20 die Rollen 33 auf die Auflaufschrägen 35 auflaufen und dadurch die Hebel 30 und somit die Saugorgane 18 in Richtung auf die Druckplatte 10 verschwenken. Federn 115 dienen der Rückführung des Hebels 30 sowie der Auflage der Rollen 33 auf den Auflaufschrägen 35.According to FIG. 17, a suction element 18 is arranged on both sides of the drive device 25. Each suction element 18 is fastened to a mist 30 which can be pivoted in the direction of the pressure plate 10 by means of a hinge 31. The position of the levers 30 is determined by a positive control 32 (see also FIG. 13), which is formed by a roller 33 which is connected to each lever 30 and which runs in a stationary guide rail 34. Each guide rail 34 has in the upper region of the magazine 4 a run-up slope 35 (FIG. 13), so that when the carriage 20 moves into an upper position, the rollers 33 run onto the run-up slopes 35 and thereby the lever 30 and thus the suction members 18 in the direction pivot onto the pressure plate 10. Springs 115 serve to return the lever 30 and to rest the rollers 33 on the ramp 35.

Im unteren Bereich des Magazins 4 sind auf sich gegenüberliegenden Seiten betätigbare Niederhalter 36 angeordnet, die einer Beaufschlagung der Druckplatte 10 in diesem Bereich dienen. Ferner sind im unteren Bereich des Magazins 4 Führungswalzen 37, 38 und 39 angeordnet.In the lower area of the magazine 4, actuatable hold-down devices 36 are arranged on opposite sides, which serve to act upon the pressure plate 10 in this area. Furthermore, 4 guide rollers 37, 38 and 39 are arranged in the lower region of the magazine.

Nachfolgend wird die Funktion des Abführens einer verwendeten Druckplatte 10 vom Druckplattenzylinder 1 in die Kassette 7 des Magazins 4 beschrieben. Hierzu wird das Magazin 4 zunächst - entsprechend der Figuren 6 und 7 - in die notwendige Schrägstellung verbracht. Anschließend öffnet sich eine Hinterkantenklemmvorrichtung 40 des Druckplattenzylinders 1 und gibt die dort eingespannte, abgewinkelte Druckplattenhinterkante 41 frei. Aufgrund der Eigenelastizität schlägt dadurch das hintere Ende der Druckplatte 10 gegen die Führungswalze 37 (Figur 13).The function of removing a printing plate 10 used from the printing plate cylinder 1 into the cassette 7 of the magazine 4 is described below. For this purpose, the magazine 4 is first brought into the required inclined position, corresponding to FIGS. 6 and 7. A rear edge clamping device 40 of the printing plate cylinder 1 then opens and releases the angled printing plate rear edge 41 clamped there. As a result of the inherent elasticity, the rear end of the pressure plate 10 strikes against the guide roller 37 (FIG. 13).

Anschließend erfolgt durch Rückwärtsdrehen (Pfeil 42) des Druckplattenzylinders 1 ein Einschieben der Druckplatte 10 in die Kassette 7 des Magazins 4. Die Führungswalzen 37, 38 und 39 helfen beim Einführen des Hinterkantenendes der Druckplatte 10. Führungsschienen 116 können angeordnet sein, die in Aussparungen der Druckplattenhinterkante 41 gleiten. Dieses Einführen ist in der Figur 13 mit gepunkteter Linie und in Figur 14 mit ausgezeichneter Linie dargestellt. Ist die Druckplatte 10 etwa zu einem Drittel in das Magazin 4 hineingefahren worden, so werden die Saugorgane 18 des sich in unterster Position innerhalb des Magazins 4 befindlichen Wagens 20 aktiviert, das heißt, die Saugnäpfe 19 bewegen sich in Richtung auf die zu haltende Druckplatte 10 und saugen sich an der Druckplatte 10 fest. Nunmehr verfährt der Wagen 20 unter gleichzeitigem weiteren Rückwärtsdrehen des Druckplattenzylinders 1 in seine obere Stellung, wodurch die Druckplatte 10 vollständig in das Magazin 4 hineingezogen wird. Hierbei wird auch die Vorderkante 44 der Druckplatte 10 entklemmt. Gelangt der Wagen 20 in den oberen Endbereich des Magazins 4, so laufen die Rollen 33 auf die Auflaufschrägen 35 auf und verschwenken die Hebel 30, so daß - gemäß Figur 15 - die abgewinkelte Druckplattenhinterkante 41 unter eine Haltekante 43 der Kassette 7 gelangt. Anschließend drücken die Niederhalter 36 die Druckplatte 10 im Bereich ihrer Vorderkante 44 nieder (Figur 16), so daß die Vorderkante 44 tiefer als eine Haltekante 45 der Kassette 7 zu liegen kommt. Durch Schwerkraft und/oder durch Verlagerung des Wagens 20 wird dann die Vorderkante 44 durch Herunterziehen der Druckplatte 10 unter die Haltekante 45 verbracht. Damit ist die Druckplatte 10 sicher in der Kassette 7 angeordnet. Insbesondere dann, wenn mehrere bereits verwendete Druckplatten 10 in der Kassette 7 untergebracht werden sollen, ist es bei den zuletzt eingebrachten Druckplatten 10 erforderlich, diese mittels des Wagens 20 herunterzuziehen und durch die Niederhalter 36 zu halten, damit sie unter die Haltekante 45 gelangen, da aufgrund relativ großer Spannungen am Druckplattenanfang die Schwerkraft allein nicht mehr ausreicht, die Druckplatten 10 in diese Lage zu versetzen.Subsequently, by turning the printing plate cylinder 1 backwards (arrow 42), the printing plate 10 is pushed into the cassette 7 of the magazine 4. The guide rollers 37, 38 and 39 help in inserting the trailing edge end of the printing plate 10. Guide rails 116 can be arranged which are in cutouts in the Slide the pressure plate trailing edge 41. This insertion is shown in FIG. 13 with a dotted line and in FIG. 14 with an excellent line. If the pressure plate 10 has been moved approximately one third into the magazine 4, the suction elements 18 of the carriage 20 located in the lowest position within the magazine 4 are activated, that is to say the suction cups 19 move in the direction of the pressure plate 10 to be held and suck on the pressure plate 10. Now the carriage 20 moves while simultaneously turning the printing plate cylinder 1 backwards into its upper position, as a result of which the printing plate 10 is completely drawn into the magazine 4. Here, the front edge 44 of the pressure plate 10 is also unclamped. If the carriage 20 reaches the upper end region of the magazine 4, the rollers 33 run onto the run-up slopes 35 and pivot the levers 30, so that - according to FIG. 15 - the angled pressure plate rear edge 41 comes under a retaining edge 43 of the cassette 7. The hold-down devices 36 then press the pressure plate 10 down in the region of its front edge 44 (FIG. 16), so that the front edge 44 comes to lie lower than a holding edge 45 of the cassette 7. By gravity and / or by moving the carriage 20, the front edge 44 is then brought under the holding edge 45 by pulling down the pressure plate 10. The printing plate 10 is thus securely arranged in the cassette 7. In particular, if several printing plates 10 that have already been used are to be accommodated in the cassette 7, it is necessary in the case of the printing plates 10 that were introduced last to pull them down by means of the carriage 20 and hold them down by the hold-down devices 36 so that they come under the holding edge 45, since due to relatively large tensions at the beginning of the printing plate, gravity alone is no longer sufficient to move the printing plates 10 into this position.

Die Entnahme der verwendeten Druckplatten 10 aus dem Magazin 4 erfolgt auf einfache Weise dadurch, daß die Kassette 7 aus dem zugeordneten Aufnahmeschacht 5 herausgezogen wird.The printing plates 10 used are removed from the magazine 4 in a simple manner by pulling the cassette 7 out of the associated receiving shaft 5.

Die Figur 18 zeigt einen Längsschnitt durch eine Kassette 7. Sie weist einen Boden 46 auf, an den sich jeweils U-förmig ausgebildete obere und untere Randbereiche 47, 48 anschließen. Der obere Randbereich 47 weist einen U-Schenkel 49 und der untere Randbereich 48 einen U-Schenkel 50 auf, der die Haltekante 45 bildet. Die Länge x des U-Schenkels 49 ist größer als die Länge y des U-Schenkels 50 ausgebildet. Der freie Abstand zwischen den Enden der U-Schenkel 49 und 50 ist derart gewählt, daß eine einzubringende Druckplatte 10 zunächst unter den U-Schenkel 49 geschoben und dann in das Innere der Kassette 7 eingeschwenkt wird, wobei die Vorderkante 44 den U-Schenkel 50 passiert. Anschließend wird dann die Druckplatte 10 derart verschoben, daß ihre Vorderkante 44 unter den U-Schenkel 50 tritt, wobei jedoch - aufgrund der größeren Länge des U-Schenkels 49- verhindert ist, daß der Hintergriff des U-Schenkels 49 aufgehoben wird. Mithin ist die Druckplatte 10 sicher im Innern der Kassette 7 untergebracht. Beim Entnehmen einer Druckplatte 9 aus einer Kassette 8 wird entsprechend vorgegangen, sofern auch eine Kassette mit Hintergriffkanten verwendet wird. Es ist jedoch auch möglich, als Kassette 8 eine Bauform ohne Hintergriffkanten einzusetzen.FIG. 18 shows a longitudinal section through a cassette 7. It has a base 46, to which the upper and lower edge regions 47, 48, which are U-shaped, are connected. The upper edge region 47 has a U-leg 49 and the lower edge region 48 has a U-leg 50, which forms the holding edge 45. The length x of the U-leg 49 is greater than the length y of the U-leg 50. The free distance between the ends of the U-legs 49 and 50 is selected such that a pressure plate 10 to be introduced is first pushed under the U-leg 49 and then pivoted into the interior of the cassette 7, the front edge 44 being the U-leg 50 happens. Then the pressure plate 10 is then displaced such that its front edge 44 comes under the U-leg 50, but - due to the greater length of the U-leg 49 - is prevented that the rear grip of the U-leg 49 is released. The printing plate 10 is therefore securely accommodated in the interior of the cassette 7. The procedure for removing a printing plate 9 from a cassette 8 is similar, provided that a cassette with rear grip edges is also used. However, it is also possible to use a design without a rear edge as the cassette 8.

Jede Kassette 7 beziehungsweise 8 weist in ihrem oberen Bereich einen Handgriff 51 auf, um das Einschieben und Herausziehen aus dem zugehörigen Aufnahmeschacht 5 beziehungsweise 6 des Magazins 4 zu erleichtern. Ferner läßt sich mittels des Handgriffs 51 die entsprechende Kassette 7 beziehungsweise 8 auch einfacher zur Druckmaschine transportieren. Ferner weist jede Kassette 7 beziehungsweise 8 eine Kennzeichnung, insbesondere eine Farbkennzeichnung, auf (diese kann beispielsweise am Handgriff 51 angeordnet sein), die in bezug zum zugehörigen Druckwerk 2 der Druckmaschine 3 steht. Beispielsweise kann der Handgriff 51 eine Farbe aufweisen, die der Druckfarbe des zugehörigen Druckwerks 2 entspricht. Auf diese Weise ist eine eindeutige Zuordnung gegeben.Each cassette 7 or 8 has a handle 51 in its upper area in order to facilitate insertion and removal from the associated receiving shaft 5 or 6 of the magazine 4. Furthermore, the corresponding cassette 7 or 8 can also be moved more easily to the printing press by means of the handle 51 transport. Furthermore, each cassette 7 or 8 has an identification, in particular a color identification (this can be arranged, for example, on the handle 51), which is related to the associated printing unit 2 of the printing press 3. For example, the handle 51 can have a color that corresponds to the printing color of the associated printing unit 2. In this way, a clear assignment is given.

Bereits hier sei schon auf eine Besonderheit der Kassette 8 eingegangen, die die neuen, noch zu verwendenden Druckplatten 9 enthält, obgleich auf die Entnahme der Druckplatten 9 aus der Kassette 8 erst später eingegangen wird. Befinden sich mehrere Druckplatten 9 aufeinander gestapelt innerhalb der Kassette 8, so ist es bei einer Entnahme der obersten Druckplatte 9 möglich, daß sich zur folgenden Druckplatte 9 ein Vakuum bildet. Dies kann dazu führen, daß versehentlich zwei Druckplatten gleichzeitig entnommen werden, weil diese "aneinanderkleben". Um dies zu verhindern, wird eine spezielle Entnahmetechnik durchgeführt, auf die nachstehend noch näher eingegangen wird, und überdies ist es möglich Abstandshalter zwischen den einzelnen Druckplatten 9 anzubringen, so daß die Ausbildung eines Vakuums verhindert wird. Die Abstandshalter sind vorzugsweise als Kunststoffzungen ausgebildet. Sie lassen sich bevorzugt in einem Rastsitz der Randbereiche einklipsen. Eine zweckmäßige Weiterbildung sieht vor, die Abstandshalter als zwei Reihen einzelner Zungen auszubilden, wobei beim Einlegen der Druckplatten beiderseitig jeweils eine Zunge zwischen zwei Druckplatten gelegt wird. Es ist günstig, diese Zungen im Bereich der zuerst in Aktion tretenden, vorderen Saugerreihe anzuordnen. Beim Bestücken einer Kassette 8 werden also zunächst Abstandshalter eingeklipst, bevor auf eine bereits in der Kassette 8 befindliche Druckplatte 9 eine weitere Druckplatte 9 gelegt wird. Die Abstandshalter sind so flexibel, daß sie bei der Entnahme der darunterliegenden Druckplatte ausweichen.A special feature of the cassette 8, which contains the new printing plates 9 that are still to be used, is already discussed here, although the removal of the printing plates 9 from the cassette 8 will be discussed later. If a plurality of printing plates 9 are stacked on top of one another within the cassette 8, it is possible, when the uppermost printing plate 9 is removed, that a vacuum is formed for the following printing plate 9. This can lead to two printing plates being accidentally removed at the same time because they "stick together". To prevent this, a special removal technique is carried out, which will be discussed in more detail below, and it is also possible to place spacers between the individual pressure plates 9, so that the formation of a vacuum is prevented. The spacers are preferably designed as plastic tongues. They can be clipped on preferably in a snap-fit seat in the edge areas. An expedient development provides for the spacers to be designed as two rows of individual tongues, one tongue being placed on each side between two pressure plates when the pressure plates are inserted. It is expedient to arrange these tongues in the area of the front row of suckers which first comes into action. When loading a cassette 8, spacers are first clipped in before another printing plate 9 is placed on a printing plate 9 already in the cassette 8. The spacers are like this flexible so that they dodge when removing the underlying pressure plate.

Soll nach dem Abführen einer Druckplatte 10 sogleich eine neue, noch zu verwendende Druckplatte 9 auf den Druckplattenzylinder 1 aufgespannt werden, so verbleibt das Magazin 4 in seiner Schrägstellung und es wird der Kassette 8 eine neue Druckplatte 9 entnommen. Dies erfolgt mittels der Plattenzuführeinrichtung 16.If, after removal of a printing plate 10, a new printing plate 9 still to be used is to be clamped onto the printing plate cylinder 1, the magazine 4 remains in its inclined position and a new printing plate 9 is removed from the cassette 8. This is done by means of the plate feed device 16.

Um mittels der Plattenzuführeinrichtung 16 dem Druckplattenzylinder 1 eine Druckplatte 9 aus der Kassette 8 zuzuleiten, befindet sich das Magazin 4 - wie bereits erwähnt - in seiner Schrägstellung, in der sich Abstützrollen 52 an dem Druckplattenzylinder 1 zugeordneten Schmitzringen 53 abstützen. Die Plattenzuführeinrichtung 16 weist an einem zweiten Wagen 54 zweite Haltemittel 55 auf, die ebenfalls als aktivierbare Saugorgane 56 (zweite Saugorgane) ausgebildet sind. Die Saugorgane sind - gemäß der Figuren 10 und 12 - jeweils zu viert in einer Reihe beabstandet zueinander angeordnet, wobei drei Reihen am zweiten Wagen 54 ausgebildet sind. Es kann auch vorgesehen sein, die untere, dem Druckplattenzylinder 1 am nächsten kommende Reihe von Saugorganen 56 mit vier Saugorganen 56 auszustatten und die übrigen Reihen mit jeweils drei. Die in der unteren, dem Druckplattenzylinder 1 zugeordneten Reihe angeordneten Saugorgane 56 sind an Hebeln 57 befestigt, die um Achsen 58 verschwenkbar sind. Zur Betätigung der Hebel 57 sind Druckzylinder 59 vorgesehen; ferner werden die Hebel 57 von einer Feder 60 beaufschlagt. Im oberen Bereich des Magazins 4 ist ein vorzugsweise optisch arbeitender Sensor 61 angeordnet, der die Stellung der zugehörigen Druckplatte 9, - insbesondere deren Stellung der Hinterkante 41 - überwacht. Zwischen der oberen und der mittleren Saugorganreihe ist eine aktivierbare Niederdrückvorrichtung 62 zur Beaufschlagung der Druckplatten 9 angeordnet. Ferner weist das Magazin 4 an seinem unteren Ende ein verlagerbares Andrückelement 63 auf, das als radial zum Druckplattenzylinder 1 verlagerbare Andruckrolle 64 ausgebildet ist.In order to feed a printing plate 9 from the cassette 8 to the printing plate cylinder 1 by means of the plate feed device 16, the magazine 4 is - as already mentioned - in its inclined position in which support rollers 52 are supported on the bearer rings 53 assigned to the printing plate cylinder 1. The plate feed device 16 has second holding means 55 on a second carriage 54, which are also designed as activatable suction members 56 (second suction members). The suction members are - according to FIGS. 10 and 12 - each four of them in a row spaced apart, three rows being formed on the second carriage 54. Provision can also be made to equip the lower row of suction members 56 closest to the printing plate cylinder 1 with four suction members 56 and the remaining rows with three each. The suction members 56 arranged in the lower row assigned to the printing plate cylinder 1 are fastened to levers 57 which can be pivoted about axes 58. Pressure cylinders 59 are provided for actuating the levers 57; furthermore, the levers 57 are acted upon by a spring 60. A preferably optically operating sensor 61 is arranged in the upper region of the magazine 4 and monitors the position of the associated pressure plate 9, in particular its position of the rear edge 41. An activatable depressing device 62 for loading the pressure plates 9 is arranged between the upper and the middle row of suction elements. The magazine also instructs 4 a displaceable pressure element 63, which is designed as a pressure roller 64 that can be displaced radially with respect to the printing plate cylinder 1.

Der zweite Wagen 54 ist mittels einer Kolben/Zylinder-Einheit 65 entlang einer zweiten Führung 66 (Figur 12) verfahrbar. Die zweite Führung wird von feststehenden Profilschienen 67 gebildet, in denen Führungsrollen 68 des Wagens 54 laufen.The second carriage 54 can be moved along a second guide 66 (FIG. 12) by means of a piston / cylinder unit 65. The second guide is formed by fixed profile rails 67, in which guide rollers 68 of the carriage 54 run.

Für das Zuführen einer Druckplatte 9 können zunächst die untersten, dem Druckplattenzylinder 1 zugeordneten Saugorgane 56 in Funktion treten, wobei sich die Hebel 57 in ihrer nicht ausgelenkten Stellung befinden. Danach werden die Saugorgane 56 der mittleren Saugerreihe und anschließend die Saugorgane 56 der oberen Saugerreihe aktiv. Eine andere Reihenfolge, beispielsweise zuerst die mittleren Sauger und dann die am Rand liegenden, ist denkbar. Durch das nicht gleichzeitig erfolgende, sondern nacheinander durchgeführte Aktivieren der Saugorganreihen, wird die zu oberst liegende, neue Druckplatte 9 so angehoben, daß sich zur darunter befindlichen weiteren Druckplatte 9 kein oder nur ein sehr geringes Vakuum bildet. Damit ist sichergestellt, daß nur eine Druckplatte 9 angehoben wird. Im übrigen können die zuvor erwähnten Abstandshalter (Kunststoffzungen) zwischen den einzelnen Druckplatten 9 angeordnet sein, was zusätzlich der Bildung eines Vakuums entgegenwirkt. Ist die Druckplatte 9 angehoben, so wird der Wagen 54 mittels der Kolben/Zylinder-Einheit 65 in Richtung des Druckplattenzylinders 1 geschoben. Dabei tritt die Vorderkante 44 der Druckplatte 9 in die Vorderkantenklemmvorrichtung 69 des Druckplattenzylinders 1, welcher zuvor entsprechend positioniert wurde. Beim oben geschilderten Vorfahren des Wagens 54 gleitet die abgewinkelte Druckplattenhinterkante 41 unter dem Sensor 61 hindurch, der die ordnungsgemäße Beförderung der Druckplatte 9 registriert. Während des Transports des Wagens 54 wird ein Bypaß in der Luftversorgung der Sauger der Saugorgane 56 aktiviert, da eine starke Saugluft nur zum Ansaugen der Druckplatte 9 notwendig ist. Nachdem der Wagen 54 nahezu seine dem Druckplattenzylinder 1 zugewandte äußerste Position erreicht hat, werden die Sauger der untersten und mittleren Reihe der Saugorgane 56 drucklos oder nur mit schwachem Unterdruck beaufschlagt; die Druckplatte 9 wird also nur von der obersten Saugerreihe gehalten. Dies hat den Zweck, daß sich die Druckplatte 9 besser ausrichten kann. Es erfolgt dann das Schließen der Vorderkantenklemmvorrichtung 69, so daß die Vorderkante 44 der Druckplatte 9 fest eingespannt wird. Anschließend dreht sich der Druckplattenzylinder 1 in Vorwärtsrichtung und zieht dabei die Druckplatte 9 auf seine Mantelfläche auf. Die Saugorgane sind durch den Bypass nur mit schwachem Unterdruck beaufschlagt, so daß sie die Druckplatte noch halten, sich diese jedoch auf den Saugorganen durch die Drehung des Plattenzylinders verschieben läßt. Vor dem Passieren der beiden oberen Saugerreihen durch die Druckplattenhinterkante werden dieser jeweils drucklos und Bügel 70 sorgen für das kollisionsfreie Vorbeigleiten der abgewinkelten Hinterkante an den Saugorganen. Durch ihre Nähe zum Druckplattenzylinder 1 ist die Druckplatte 9 im Bereich der unteren Reihe der Saugorgane 56 relativ starr, so daß zum Passieren der abgewinkelten Druckplattenhinterkante 41 ein Hebel 57, der als Platte mit Scharnier ausgebildet ist und auf dem die gesamte Saugerreihe angeordnet ist, oder mehrere Hebel 57 in ihre in der Figur 10 wiedergegebene Stellung mittels eines oder mehrerer Zylinder 59 verschwenkt werden, so daß die Druckplattenhinterkante 41 einwandfrei die Saugerreihe passieren kann. Anschließend wird die Andruckrolle 64 radial in Richtung auf den Druckplattenzylinder 1 bewegt, wodurch die abgewinkelte Druckplattenhinterkante 41 in die Hinterkantenklemmvorrichtung 40 des Druckplattenzylinders 1 hineingedrückt wird. Die Hinterkantenklemmvorrichtung 40 schließt sich und spannt anschließend die Druckplatte durch entsprechende Verlagerung in Umfangsrichtung des Druckplattenzylinders 1. Danach bewegt sich der Wagen 54 in seine Ursprungsstellung zurück, um zum gegebenen Zeltpunkt die nächste Druckplatte 9 zu erfassen.For feeding a printing plate 9, the lowest suction members 56 assigned to the printing plate cylinder 1 can first come into operation, the levers 57 being in their undeflected position. Then the suction members 56 of the middle row of suckers and then the suction members 56 of the top row of suckers become active. Another order is conceivable, for example first the middle suction cups and then the ones on the edge. As a result of the activation of the rows of suction elements, which does not take place simultaneously, but is carried out one after the other, the new pressure plate 9 located at the top is raised in such a way that no or only a very slight vacuum forms to the further pressure plate 9 underneath. This ensures that only one pressure plate 9 is raised. Otherwise, the aforementioned spacers (plastic tongues) can be arranged between the individual pressure plates 9, which additionally counteracts the formation of a vacuum. If the pressure plate 9 is raised, the carriage 54 is pushed in the direction of the pressure plate cylinder 1 by means of the piston / cylinder unit 65. The front edge 44 of the pressure plate 9 enters the front edge clamping device 69 of the pressure plate cylinder 1, which was previously positioned accordingly. In the ancestor of the carriage 54 described above, the angled pressure plate rear edge 41 slides under the sensor 61, which registers the correct transport of the pressure plate 9. During the carriage 54 carriage is a Bypass activated in the air supply of the suction of the suction members 56, since a strong suction air is only necessary for suction of the pressure plate 9. After the carriage 54 has almost reached its outermost position facing the pressure plate cylinder 1, the suction devices of the bottom and middle rows of the suction members 56 are pressureless or only subjected to a weak vacuum; the pressure plate 9 is therefore only held by the top row of suction cups. The purpose of this is that the pressure plate 9 can align better. Then the front edge clamping device 69 is closed, so that the front edge 44 of the pressure plate 9 is firmly clamped. Then the printing plate cylinder 1 rotates in the forward direction and pulls the printing plate 9 onto its outer surface. Due to the bypass, the suction elements are only subjected to a slight negative pressure, so that they still hold the pressure plate, but this can be moved on the suction elements by the rotation of the plate cylinder. Before the two upper rows of suction cups pass through the pressure plate trailing edge, these are each depressurized and brackets 70 ensure that the angled trailing edge glides past the suction elements without collision. Due to their proximity to the pressure plate cylinder 1, the pressure plate 9 is relatively rigid in the area of the lower row of suction elements 56, so that a lever 57, which is designed as a plate with a hinge and on which the entire row of suction devices is arranged, for passing the angled pressure plate rear edge 41, or several levers 57 are pivoted into their position shown in FIG. 10 by means of one or more cylinders 59, so that the pressure plate rear edge 41 can pass the row of suction cups without any problems. The pressure roller 64 is then moved radially in the direction of the printing plate cylinder 1, as a result of which the angled printing plate rear edge 41 is pressed into the rear edge clamping device 40 of the printing plate cylinder 1. The trailing edge clamping device 40 closes and then clamps the pressure plate corresponding shift in the circumferential direction of the printing plate cylinder 1. Then the carriage 54 moves back to its original position in order to capture the next printing plate 9 at the given tent point.

Die Vorrichtung bewegt sich in ihre Ausgangsstellung zurück, indem die Zylinder 59 drucklos werden, so daß die Federn 60 dafür sorgen können, daß der oder die Hebel 57 in ihre Ursprungsstellung zurück gehen. Anschließend tritt dann die Niederdrückvorrichtung 62 in Aktion, die dafür sorgt, daß die verbleibenden Druckplatten 9 sauber in der Kassette 8 verbleiben und nicht herauskippen können, insbesondere wenn das Magazin 4 in seine vertikale Stellung zurückgeschwenkt wird.The device moves back to its original position by depressurizing the cylinders 59 so that the springs 60 can cause the lever (s) 57 to return to their original position. Then the depressing device 62 then comes into action, which ensures that the remaining printing plates 9 remain clean in the cassette 8 and cannot tip out, in particular when the magazine 4 is pivoted back into its vertical position.

Die Figur 10 zeigt, daß der oberen und der mittleren Reihe der Saugorgane 56 elastische Bügel 70 zugeordnet sind. Die Elastizität der Bügel 70 erlaubt das Ansaugen der zu verwendenden Druckplatte 9, das heißt, die Bügel 70 treten bei diesem Vorgang nicht störend in Erscheinung. Sobald die Saugorgane 56 keinen Unterdruck mehr aufweisen und insofern bei der Plattenzuführung die Druckplattenhinterkante 41 an den Saugorganen 56 vorbeigleitet, sorgen die Bügel 70 dafür, daß die abgewinkelte Druckplattenhinterkante 41 sich nicht an den Saugern der Saugorgane 56 verfängt.FIG. 10 shows that elastic brackets 70 are associated with the upper and middle rows of the suction members 56. The elasticity of the brackets 70 allows the pressure plate 9 to be used to be sucked in, that is to say the brackets 70 do not interfere with this process. As soon as the suction elements 56 no longer have a negative pressure and the pressure plate rear edge 41 slides past the suction elements 56 when the plate is fed, the brackets 70 ensure that the angled pressure plate rear edge 41 does not get caught on the suction elements of the suction elements 56.

Claims (16)

  1. Device, designed as a magazine (4), for removing and supplying printing plates (10, 9) from and to a printing-plate cylinder (1) of a printing machine for an automatic printing-plate change, with a plate-removal apparatus (13) having first holding means (17) and with a plate-supply apparatus (16), characterized in that the plate-supply apparatus (16) has a plurality of successively activatable second holding means for the printing plate (9) which are arranged in a distributed manner, in that a sensor (61) monitors the rear edge of the printing plate (9) to be used for a perfect supply to the printing-plate cylinder (1), and in that during the supply of the printing plate (9) to the printing-plate cylinder (1), the second holding means (55) assigned to the front edge (44) of the printing plate (9) can be displaced transversely relative to the printing-plate plane in a controllable manner, so that the rear edge (41) of the printing plate (9) can pass them without collision.
  2. Device according to Claim 1, characterized in that the second holding means (55) are arranged distributed over the length of the printing plates (9) to be used.
  3. Device according to one of the preceding claims, characterized in that the second holding means (55) are arranged in a row.
  4. Device according to one of the preceding claims, characterized in that the second holding means (55) are designed as activatable suction members (56).
  5. Device according to one of the preceding claims, characterized in that the second holding means (55) are arranged on a carriage (54) which is movable along a guide (66).
  6. Device according to one of the preceding claims, characterized in that the second holding means (55) assigned to the front edge (44) of the printing plate (9) release the printing plate (9) located approximately in or in the tensioning position before the printing plate (9) is tensioned at its front edge (44) on the printing-plate cylinder (1).
  7. Device according to one of the preceding claims, characterized in that, during the operation of tensioning the front edge (44) of the printing plate (9), the second holding means (55) assigned to the rear edge (41) of the printing plate (9) continue to hold the printing plate (9) to be used.
  8. Device according to one of the preceding claims, characterized by at least one pressure element (63), displaceable radially relative to the printing-plate cylinder (1) by activation and designed as a pressure roller (64), for introducing the angled rear edge (41) into a clamping device (40) of the printing-plate cylinder (1).
  9. Device according to one of the preceding claims, characterized in that one or more printing plates (9) to be supplied are arranged in a cassette (8), and this cassette (8) can be pushed into the magazine (4).
  10. Device according to one of the preceding claims, characterized by a pressing-down device (62) which loads the printing plates (9) to be used transversely relative to their planes, in order to prevent them from tipping out of the associated cassette (8).
  11. Device according to one of the preceding claims, characterized in that the cassette (8) receiving the printing plates (9) to be used has spacers which are arranged between respective adjacent printing plates (9).
  12. Device according to one of the preceding claims, characterized in that the spacers are designed as plastic tongues.
  13. Device according to one of the preceding claims, characterized in that the spacers can be fastened to the cassette (8) with a catch fit.
  14. Device according to one of the preceding claims, characterized in that the spacers are designed as two rows of individual tongues, these being arranged on the edge regions of the cassette in such a way that a tongue can be laid between two printing plates on each of the two sides.
  15. Device according to one of the preceding claims, characterized in that the spacers are arranged on both sides in the region of the front row of suckers.
  16. Device according to one of the preceding claims, characterized in that the cassette (8) has a colour marking which relates to the associated printing unit (2) and therefore to the printing ink to be printed by the printing unit (2), that is to say the same colour for marking and printing ink.
EP92919011A 1991-09-12 1992-09-07 Device for removing and/or supplying printing plates of a printing machine Expired - Lifetime EP0603246B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4130359A DE4130359C2 (en) 1991-09-12 1991-09-12 Device for removing and / or feeding printing plates from a printing press
DE4130359 1991-09-12
PCT/EP1992/002057 WO1993004864A1 (en) 1991-09-12 1992-09-07 Process and device for supplying printing plates to a printing machine

Publications (2)

Publication Number Publication Date
EP0603246A1 EP0603246A1 (en) 1994-06-29
EP0603246B1 true EP0603246B1 (en) 1995-05-31

Family

ID=6440455

Family Applications (3)

Application Number Title Priority Date Filing Date
EP92919178A Expired - Lifetime EP0603261B1 (en) 1991-09-12 1992-09-07 Printing plate magazine for a printing machine and printing plate exchange process
EP92919011A Expired - Lifetime EP0603246B1 (en) 1991-09-12 1992-09-07 Device for removing and/or supplying printing plates of a printing machine
EP92919010A Expired - Lifetime EP0603245B1 (en) 1991-09-12 1992-09-07 Process and device for carrying away printing plates from a printing machine

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP92919178A Expired - Lifetime EP0603261B1 (en) 1991-09-12 1992-09-07 Printing plate magazine for a printing machine and printing plate exchange process

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP92919010A Expired - Lifetime EP0603245B1 (en) 1991-09-12 1992-09-07 Process and device for carrying away printing plates from a printing machine

Country Status (9)

Country Link
US (3) US5537926A (en)
EP (3) EP0603261B1 (en)
JP (3) JP2669935B2 (en)
CN (3) CN1029213C (en)
AT (3) ATE122965T1 (en)
CA (2) CA2118583C (en)
DE (4) DE4130359C2 (en)
HK (2) HK12396A (en)
WO (3) WO1993004864A1 (en)

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Also Published As

Publication number Publication date
CN1029212C (en) 1995-07-05
HK12396A (en) 1996-02-02
ATE135970T1 (en) 1996-04-15
EP0603261A1 (en) 1994-06-29
JPH07500294A (en) 1995-01-12
US5495805A (en) 1996-03-05
WO1993004864A1 (en) 1993-03-18
EP0603245A1 (en) 1994-06-29
JPH07500295A (en) 1995-01-12
CA2118583A1 (en) 1993-03-18
CN1030048C (en) 1995-10-18
DE59202416D1 (en) 1995-07-06
JP2669934B2 (en) 1997-10-29
DE4130359A1 (en) 1993-03-18
ATE123255T1 (en) 1995-06-15
JP2760898B2 (en) 1998-06-04
EP0603246A1 (en) 1994-06-29
US5537926A (en) 1996-07-23
CN1071369A (en) 1993-04-28
ATE122965T1 (en) 1995-06-15
DE4130359C2 (en) 1997-04-17
EP0603261B1 (en) 1996-03-27
JPH07500293A (en) 1995-01-12
JP2669935B2 (en) 1997-10-29
WO1993004865A1 (en) 1993-03-18
CA2118583C (en) 1998-09-15
DE59205874D1 (en) 1996-05-02
HK122496A (en) 1996-07-19
CN1029213C (en) 1995-07-05
CA2118582A1 (en) 1993-03-18
WO1993004863A1 (en) 1993-03-18
CN1071368A (en) 1993-04-28
US5443006A (en) 1995-08-22
DE59202367D1 (en) 1995-06-29
CN1071370A (en) 1993-04-28
EP0603245B1 (en) 1995-05-24
CA2118582C (en) 1997-01-07

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