EP1052095B1 - Dispositif pour contrôler la position des plaques d'impression sur cylindres porte-plaques des machines d'impression - Google Patents

Dispositif pour contrôler la position des plaques d'impression sur cylindres porte-plaques des machines d'impression Download PDF

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Publication number
EP1052095B1
EP1052095B1 EP00107764A EP00107764A EP1052095B1 EP 1052095 B1 EP1052095 B1 EP 1052095B1 EP 00107764 A EP00107764 A EP 00107764A EP 00107764 A EP00107764 A EP 00107764A EP 1052095 B1 EP1052095 B1 EP 1052095B1
Authority
EP
European Patent Office
Prior art keywords
printing
plate
displacement transducer
printing plate
plate cylinder
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
EP00107764A
Other languages
German (de)
English (en)
Other versions
EP1052095A1 (fr
Inventor
Franz Reiner
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 EP1052095A1 publication Critical patent/EP1052095A1/fr
Application granted granted Critical
Publication of EP1052095B1 publication Critical patent/EP1052095B1/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
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/005—Attaching and registering printing formes to supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/30—Detecting the correct position of printing plates on the cylinder

Definitions

  • the invention relates to a device for controlling the position of printing plates on the plate cylinder of printing machines, in particular sheet-fed offset printing machines according to the preamble of claim 1.
  • the individual printing plates are first attached to the edge associated with the beginning of printing on a fastening device and then mounted around the outer periphery of the plate cylinder. This is followed by fixing the edge associated with the duck. So that the individual printing plates are in register with one another, cut-outs are made on the leading edge (beginning of printing) which interact with stops in the form of register pins mounted on the plate cylinder or fastening device.
  • the fastening of the Druckggling- edge of the pressure plate is only when the pressure plate rests with their punched to the register pins.
  • EP 0075900 A1 discloses a device for controlling the register accurate clamping of printing plates on the plate cylinder of an offset-Duckmaschine in which the beginning of the pressure associated edge of the pressure plate 2 has U-shaped punched out. These punched-out pieces interact with register stops (registration pins) mounted in the fastening device receiving the printing start edge.
  • register stops registration pins
  • two position sensors designed as feeler pins are arranged, which determine the position of the front edge of the printing plate in an area outside the punch-outs interacting with the stops.
  • the styli are associated with display devices, so that it is possible to read the position of the printing plate with respect to the plate cylinder.
  • This prior art device is used for register-oriented alignment of printing plates on the plate cylinder. Whether a manually or automatically supplied pressure plate with the U-shaped punched out correctly against the stops (register pins) can not be determined with this prior art device.
  • the object of the present invention is therefore to develop a device for controlling the registration of printing plates on the plate cylinder of printing presses according to the preamble of claim 1 such that in a simple way an accurate and independent of the material of the printing plate register control is possible.
  • the signal of the displacement transducer is evaluated with respect to time by an evaluation unit connected downstream of the displacement transducer in such a way that a path signal which does not change any further within a predetermined period of time serves as an indication of one with the U-shaped punches on the register stops adjoining pressure plate is scored. If the printing plate is fed manually or automatically (transport system) of the fastening device located in the plate cylinder, the movement of the pressure plate is stopped exactly when it rests against the register stops with the U-shaped punched out. The measuring range of the transducer is selected such that a pressure plate, if this is not present with the U-shaped punched to the register stops, can not be detected by the transducer.
  • the displacement transducer according to the invention can be mounted according to an embodiment of the invention in the fastening device for the pressure plate (in the plate cylinder). It is possible that the displacement sensor interacts without contact with the front edge of the printing plate.
  • the displacement sensor can be designed as an optical sensor operating according to the principle of triangulation.
  • the fastening device is a springy having mounted stylus, which is arranged perpendicular to the plane of the pressure plate in the detection range of the fastening device for the pressure plate. If the pressure plate is inserted into the fastening device with the register stops, this stylus experiences a deflection, which can be detected by an associated measuring device.
  • the associated measuring device which forms the transducer according to the invention with the stylus, may also be mounted in the plate cylinder or on the fastening device for the printing plate. The measurement of the deflection of the stylus and thus the path of the printing plate leading edge within the fixture can be done without contact (optical, inductive) or by means of contacting elements.
  • the Wegaufrich invention is preferably assigned to the center of the fastening device or arranged there.
  • the fastening device with two or more displacement transducers, which interact with the edge regions of the pressure plate located between the register stops or the register stops located outside the register stops.
  • the signal of the displacement transducer is transmitted via a rotary transformer or contactless transmission means to the evaluation unit, which is preferably arranged stationarily outside the plate cylinder.
  • the invention is designed when the position transducer is arranged outside the plate cylinder and at the intended for the supply of the printing plate position on the plate cylinder and thus the fastening device is employed.
  • a centrally disposed between the register stops in the mounting device, spring-loaded stylus is provided, which undergoes a corresponding deflection by the pressure plate introduced into the fastening device.
  • the radially outwardly pointing end of this stylus has a region of permanent magnetization (permanent magnet), with which a preferably outside of the plate cylinder arranged and assigned when feeding the new pressure plate to the plate cylinder is arranged magnetic sensor.
  • This magnetic sensor is preferably designed as a differential-magnetorecessive sensor, by means of which a signal corresponding to the location of the magnet and also proportional within the measuring range can be taken.
  • the signal of this magnetic sensor is fed to the evaluation unit and evaluated there in terms of path-time behavior.
  • the evaluation unit essentially comprises a differentiating stage, so that a path signal that can no longer be changed over time can be detected. Changes the Wegsinal within a predetermined period of time no longer, then a signal is generated by the evaluation, which is displayed on a downstream display unit as a "printing plate registerme".
  • a plate cylinder 2 shown in principle, has a fastening device 3 receiving the pressure beginning edge of a pressure plate 1 in the form of a clamping rail. At the front edge of the pressure plate 1 are spaced from each other two U-shaped punched-6, 7, which cooperate with arranged in the fastening device 3 stops 4, 5 (register pins). These stops 4, 5 define the register-correct position of the printing plate 1 on the plate cylinder. 2
  • the fastening device 3 of the plate cylinder 2 is associated with a position transducer 8, through which the position of the Pressure plate leading edge within the fastening device 3 can be detected.
  • the transducer 8 may be arranged in the plate cylinder 2 or according to a preferred embodiment of the invention outside the plate cylinder. 2
  • transducer 8 With the transducer 8 is an evaluation unit 10 in signal connection, in which the path-time signals of the transducer 8 are evaluated in the manner explained further below.
  • Figure 2 shows a section through the clamping device formed as a clamping rail 3 for the Druck worrying- edge of the printing plate 1.
  • the leading edge of the printing plate 1 is inserted into a detection area formed as a gap 11. This detection area 11 is to close by moving a component, which is clamped by the pressure plate 1.
  • a recess 12 of the fastening device 3 is a perpendicular to the plane of the pressure plate 1 and thus also to the feed direction of the pressure plate 1 extending stylus 13 is arranged.
  • This stylus 13 is mounted by means not shown in the feed direction of the pressure plate 1 (arrow) movable and resilient (spring 14).
  • the stylus 13 extends in the radial direction of the plate cylinder 1, not shown in Figure 2.
  • a displacement transducer 8 is assigned to the end of the stylus 13 led out of the fastening device 3 through the recess 12.
  • the end of the stylus 13 has a Pernamentmagneten 15, accordingly, the Transducer 8 is designed as a sensor which detects the location of this rotor Pernament 15 within a predetermined measuring range 9 ( Figure 1).
  • the transducer 8 can - as already mentioned - attached to the plate cylinder and thus pernament the fastening device 3 together with stylus 13 be assigned.
  • the invention if the position transducer 8 is fixed to the frame suspended and is employed only in the intended for the replacement of printing plates position of the plate cylinder 2 to this and the fastening device 3, designed.
  • the displacement transducer 8 occupies a predetermined distance and orientation with respect to the fastening device 3 and the stylus 13 mounted therein.
  • the evaluation unit 10 generates a corresponding output signal, indicating and / or Actuation of the fastening device 3 can be used.

Landscapes

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

Claims (7)

  1. Dispositif pour contrôler la position de plaques d'impression sur le cylindre porte-plaques de machines d'impression, notamment de machines d'impression offset à feuilles, comportant un dispositif de fixation recevant le début d'impression de la plaque d'impression, une découpe en forme de U coopérant avec une butée sur le cylindre porte-plaques étant réalisée sur le bord de début d'impression de la plaque d'impression, et un détecteur de déplacement détectant la position du bord de plaque d'impression, le détecteur de déplacement (8) pouvant émettre un signal temps-déplacement (S, t) indiquant la position du bord avant de la plaque d'impression (1) dans le dispositif de fixation (3) dans le temps,
    caractérisé en ce qu'une unité d'analyse (10) est installée en aval du détecteur de déplacement (8), laquelle peut déterminer la variation dans le temps du signal (S) du détecteur de déplacement (8).
  2. Dispositif selon la revendication 1,
    caractérisé en ce que le détecteur de déplacement (8) permet de détecter la position du bord avant de la plaque d'impression (1) à l'intérieur d'une zone de mesure (9) de taille donnée.
  3. Dispositif selon la revendication 1 ou 2,
    caractérisé en ce que le détecteur de déplacement (8) est réalisé sous la forme d'un capteur sans contact détectant la position du bord de la plaque d'impression (1).
  4. Dispositif selon la revendication 1 ou 2,
    caractérisé en ce que, dans le dispositif de fixation (3), est agencé un palpeur (13) s'étendant perpendiculairement au sens d'introduction de la plaque d'impression et pouvant être dévié par le bord de la plaque d'impression (1), dont la position peut être détectée par le détecteur de déplacement (8).
  5. Dispositif selon l'une des revendications précédentes,
    caractérisé en ce que le détecteur de déplacement (8) est agencé dans le cylindre porte-plaques (2).
  6. Dispositif selon l'une des revendications 1 à 4,
    caractérisé en ce que le détecteur de déplacement (8) est suspendu fixement au bâti en dehors du cylindre porte-plaques (2) et peut être réglé dans une position prévue pour l'acheminement de la nouvelle plaque d'impression (1) vers le cylindre porte-plaques (2).
  7. Dispositif selon la revendication 4,
    caractérisé en ce que le palpeur (13) présente sur une extrémité un aimant permanent (15) et en ce que le détecteur de déplacement (8) est un capteur détectant la position de l'aimant permanent (15).
EP00107764A 1999-04-22 2000-04-11 Dispositif pour contrôler la position des plaques d'impression sur cylindres porte-plaques des machines d'impression Expired - Lifetime EP1052095B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29907121U DE29907121U1 (de) 1999-04-22 1999-04-22 Einrichtung zur Kontrolle der Lage von Druckplatten auf dem Plattenzylinder von Druckmaschinen
DE29907121U 1999-04-22

Publications (2)

Publication Number Publication Date
EP1052095A1 EP1052095A1 (fr) 2000-11-15
EP1052095B1 true EP1052095B1 (fr) 2007-05-30

Family

ID=8072536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00107764A Expired - Lifetime EP1052095B1 (fr) 1999-04-22 2000-04-11 Dispositif pour contrôler la position des plaques d'impression sur cylindres porte-plaques des machines d'impression

Country Status (3)

Country Link
EP (1) EP1052095B1 (fr)
AT (1) ATE363395T1 (fr)
DE (2) DE29907121U1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008005878B4 (de) 2007-02-09 2014-05-15 Heidelberger Druckmaschinen Ag Verfahren zum Ausrichten einer Druckplatte an einem Anschlag

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3138865C2 (de) * 1981-09-30 1983-12-29 Grapho Metronic Meß- und Regeltechnik GmbH & Co KG, 8000 München Vorrichtung zur Kontrolle des registergenauen Aufspannens von Druckplatten auf dem Plattenzylinder einer Offset-Druckmaschine
JP2573523Y2 (ja) * 1992-07-31 1998-06-04 株式会社小森コーポレーション 印刷機の刷版装着装置
DE4306237A1 (de) * 1993-02-27 1994-09-01 Heidelberger Druckmasch Ag Einrichtung zur Einstellung des Schrägregisters in einer Spanneinrichtung zum Einspannen von Druckplatten in einer Offsetdruckmaschine

Also Published As

Publication number Publication date
EP1052095A1 (fr) 2000-11-15
ATE363395T1 (de) 2007-06-15
DE29907121U1 (de) 1999-07-01
DE50014359D1 (de) 2007-07-12

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