EP0653301B1 - Procédé et dispositif de commande du changement automatique de plaques dans les machines d'impression - Google Patents

Procédé et dispositif de commande du changement automatique de plaques dans les machines d'impression Download PDF

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Publication number
EP0653301B1
EP0653301B1 EP94116680A EP94116680A EP0653301B1 EP 0653301 B1 EP0653301 B1 EP 0653301B1 EP 94116680 A EP94116680 A EP 94116680A EP 94116680 A EP94116680 A EP 94116680A EP 0653301 B1 EP0653301 B1 EP 0653301B1
Authority
EP
European Patent Office
Prior art keywords
printing plate
plate
gripping region
register
front edge
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
EP94116680A
Other languages
German (de)
English (en)
Other versions
EP0653301A1 (fr
Inventor
Bernd Lindner
Nikola Pupic
Helmut Schild
Berthold Seib
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0653301A1 publication Critical patent/EP0653301A1/fr
Application granted granted Critical
Publication of EP0653301B1 publication Critical patent/EP0653301B1/fr
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
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/36—Means for registering or alignment of print plates on print press structure

Definitions

  • the invention relates to a method and a device for controlling an automated printing plate changing process according to the preamble of claims 1 and 6.
  • a printing plate is attached to the plate cylinder by means of a tensioning rail assigned to the start of printing and to the end of printing.
  • the tensioning rails are arranged in a pit of the plate cylinder.
  • the clamp at the end of the print is released and the plate is removed by turning the plate cylinder backwards until the clamp at the start of the print can also be released.
  • a new printing plate is inserted with its front edge into the printing start clamping rail, clamped and then the plate cylinder is rotated in the forward direction until the trailing end of the printing plate can be inserted into the printing end clamping rail and clamped there.
  • the pressure plate is tensioned via the pressure end tensioning rail.
  • DE 41 30 359 A1 discloses a device and a method for changing printing plates of a printing press, in which the printing plate change can be carried out both semi-automatically and fully automatically. Especially in the semi-automatic working mode it is provided that the operator controls the changing process by repeatedly operating controls. Depending on the large number of sub-processes to be triggered, this can be complex.
  • a semi-automatic printing plate feed system is known as PPL (Power Plate Loading) from MAN Roland Druckmaschinen AG and is used on R 700 series machines.
  • PPL Power Plate Loading
  • the printer only has to remove one printing plate and one from the plate cylinder through a slot in the slide protection Feed the new pressure plate to the plate cylinder.
  • pneumatically movable sliding protection is provided with a guide device which is pivotably mounted and removable with respect to the plate cylinder. The remotely controlled clamping, unclamping and the corresponding positioning processes of the plate cylinder are triggered by the printer via operating elements.
  • the object of the present invention is therefore to further develop a method and a device in accordance with the corresponding preamble such that, in the case of a semi-automatic printing plate change process, the number of commands to be entered by the printer on operating elements is as small as possible and, in addition, an increase occurs in a fully automatic printing plate change process Interference immunity results.
  • the register pins which can in particular be interrogated electrically, are not only used to determine whether a new printing plate to be fed has been inserted in the printing start tensioning rail in register, whereupon the clamping process is initiated. According to the invention, the register pins are also queried to determine whether the used printing plate has been removed from the pressure start clamping rail (clamping released).
  • the register pins which can in particular be interrogated electrically, are also used not only to determine whether the used printing plate has been removed from the opened pressure start clamping rail and also whether a newly inserted printing plate is in register (clamping rail open) .
  • the clamping process is provided and then check the register pins again. This repeated query can be used to determine whether there is a possible shift in position due to the clamping of the pressure plate.
  • the register pins which can in particular be interrogated electrically, are interrogated separately, i.e. it can be determined and can also be signaled acoustically by means of corresponding light-emitting diodes or whether the pressure plate is not correctly in contact with either the register pin on the drive or operating side.
  • the plate change command was entered (start) on a printing unit or centrally at a control center, which is done by pressing a corresponding command button.
  • the plate cylinder is then positioned in a certain angular position, which is done by moving forward or backward.
  • the tension and the clamping on the pressure end tensioning rail (DE) are released by activating the appropriate actuating means.
  • the used pressure plate is now included conveyed in front of its rear edge, for example, into an automatic printing plate changer or into a receiving device to be disposed of manually.
  • the positioning of the plate cylinder takes place in particular in the angular position which also serves to insert the front edge of a new printing plate to be fed into the corresponding pressure start clamping rail (DA).
  • DA pressure start clamping rail
  • the pressure start clamping rail (DA) is opened. So the clamping is released. Then there is an interrogation of the register pins attached in the plate cylinder and in the pressure start clamping rail there. This determines whether the pressure plate is still in contact with both register pins.
  • the programmed sequence is interrupted at this point by a continuous query (waiting loop).
  • this query is carried out over a predetermined interval, for example one second (1S), i.e. the program continues to run only if both register pins have no contact with the printing plate for at least this time interval (register pins off? - yes).
  • the query described last as to whether the register pins are inactive, ie not being touched by the printing plate, determines whether the printing plate has been removed or removed manually. Because of its own weight, the pressure plate will always rest against one of the register pins when the start of the clamping rail is open, as long as it is not gripped for removal. This is shown in the basic flowchart by the dashed outline of the corresponding step (pressure plate from DA rail). However, it does not matter whether the The printing plate is manually pulled out of the pressure start clamping rail (DA) or removed using appropriately activated funding.
  • DA pressure start clamping rail
  • a further query is made as to whether a new printing plate has been inserted into the print start clamping rail (DA) according to the register (new plate in the DA rail). Again it is envisaged that this is a certain time interval, e.g. For 1 second (register pins on?), Which is taken as an indication that the printing plate is correctly fitted. If the intended criterion is not met (no), the query is repeated until this is the case. If this criterion is fulfilled (yes), the pressure start clamping rail (DA) is closed in a next program step. The pressure plate is thus clamped on its front edge.
  • the pressure plate is pulled open by turning the plate cylinder forward accordingly, then inserting the pressure end (DE) of the pressure plate into the corresponding tensioning rail, clamping and tensioning the pressure plate. Shutdown may also take place during the mounting process of devices attached to the plate cylinder. After all the specified actions have been carried out, the printing plate change has ended (end).
  • a plate change on a printing unit has been described above. The same procedure is followed for the other printing units. It can be provided that the operator triggers the change process on each printing unit via one or more buttons - as can be seen, no further commands are necessary during the changing process on a printing unit.
  • the procedure of the invention is very advantageous if, in the case of a multicolour machine, since the command "plate change" only has to be given once (first printing unit or control station) and the control system is programmed such that after the end of the plate change in the first printing unit the corresponding processes and the positioning of the plate cylinder are immediately initiated in the following printing unit. Because of the query according to the invention, the control sequence is interrupted until the new plate has been fed. The same applies to the other printing units.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (9)

  1. Procédé pour commander un processus automatisé de changement de plaque d'impression, dans une machine d'impression, en particulier une machine d'impression offset à feuilles, pour lequel une plaque d'impression utilisée est éloignée de la zone de prise ouverte d'un rail tendeur associé au début d'impression du cylindre porte-plaque, et ensuite une nouvelle plaque d'impression est introduite, par son bord avant, dans la zone de prise ouverte, et la zone de prise est fermée, et avant la fermeture de la zone de prise on vérifie si le bord avant de la nouvelle plaque d'impression prend une position conforme au registre relativement au cylindre porte-plaque,
    caractérisé en ce qu'avant l'amenée de la nouvelle plaque d'impression, on vérifie si la plaque d'impression utilisée ne prend pas, par son bord avant, la position conforme au registre, et en ce que l'amenée de la nouvelle plaque d'impression est effectuée uniquement lorsque cette condition est satisfaite.
  2. Procédé selon la revendication 1,
    caractérisé en ce que la vérification pour savoir si le bord avant de la plaque d'impression prend ou ne prend pas une position conforme au registre, est réalisée à deux points du cylindre porte-plaque, écartés axialement l'un de l'autre.
  3. Procédé selon l'une des revendications 1 ou 2,
    caractérisé en ce que la vérification pour savoir si le bord avant de la plaque d'impression prend ou ne prend pas une position conforme au registre, est réalisée durant un intervalle de temps déterminé.
  4. Procédé selon l'une des revendications précédentes,
    caractérisé en ce qu'après la fermeture de la zone de prise, du rail tendeur associé au début d'impression du cylindre porte-plaque, on réalise une autre vérification pour savoir si la nouvelle plaque d'impression prend une position conforme au registre, et si cette condition n'est pas satisfaite, on réalise une ouverture de la zone de prise.
  5. Procédé selon au moins l'une des revendications 1 ou 2,
    caractérisé en ce que la surveillance pour savoir si le bord avant de la plaque d'impression prend ou ne prend pas une position conforme au registre, est réalisée indépendamment aux deux zones écartées axialement l'une de l'autre.
  6. Dispositif pour la mise en oeuvre du procédé selon l'une des revendications 1 à 5, comportant une commande qui est en liaison active avec le rail tendeur réalisant l'ouverture et la fermeture de la zone de prise et associé au début d'impression du cylindre porte-plaque, et qui est reliée en outre à un dispositif de reconnaissance de position qui coopère avec le bord avant de la plaque d'impression,
    caractérisé en ce que par la commande par l'intermédiaire des moyens de réglage, la zone de prise est maintenue dans la position ouverte jusqu'à ce qu'a été vérifié au moins une fois que la plaque d'impression utilisée avec son bord avant n'est pas détectée par le dispositif de reconnaissance de position.
  7. Dispositif selon la revendication 6,
    caractérisé en ce que la commande est en liaison active avec deux broches de registre, écartées axialement l'une de l'autre, agencées dans le rail tendeur associé au début d'impression du cylindre porte-plaque, et susceptibles d'être interrogées électriquement.
  8. Dispositif selon l'une des revendications 6 ou 7,
    caractérisé en ce que les broches de registre, agencées dans le rail tendeur et susceptibles d'être interrogées électriquement, sont reliées individuellement à la commande.
  9. Dispositif selon la revendication 8,
    caractérisé en ce que deux moyens d'affichage sont prévus, par lesquels on peut représenter, par l'intermédiaire de la commande, contre quelle broche de registre la plaque d'impression repose ou ne repose pas.
EP94116680A 1993-11-12 1994-10-22 Procédé et dispositif de commande du changement automatique de plaques dans les machines d'impression Expired - Lifetime EP0653301B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4338664 1993-11-12
DE4338664A DE4338664C2 (de) 1993-11-12 1993-11-12 Verfahren und Vorrichtung zum Steuern eines automatisierten Druckplattenwechselvorganges bei Druckmaschinen

Publications (2)

Publication Number Publication Date
EP0653301A1 EP0653301A1 (fr) 1995-05-17
EP0653301B1 true EP0653301B1 (fr) 1997-01-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP94116680A Expired - Lifetime EP0653301B1 (fr) 1993-11-12 1994-10-22 Procédé et dispositif de commande du changement automatique de plaques dans les machines d'impression

Country Status (5)

Country Link
US (1) US5479859A (fr)
EP (1) EP0653301B1 (fr)
JP (1) JP2948114B2 (fr)
AT (1) ATE147011T1 (fr)
DE (2) DE4338664C2 (fr)

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Also Published As

Publication number Publication date
DE59401466D1 (de) 1997-02-13
DE4338664C2 (de) 1995-09-14
DE4338664A1 (de) 1995-05-18
JP2948114B2 (ja) 1999-09-13
EP0653301A1 (fr) 1995-05-17
ATE147011T1 (de) 1997-01-15
JPH07186370A (ja) 1995-07-25
US5479859A (en) 1996-01-02

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