EP1120250A2 - Système de transport pour une machine à imprimer - Google Patents

Système de transport pour une machine à imprimer Download PDF

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Publication number
EP1120250A2
EP1120250A2 EP00127029A EP00127029A EP1120250A2 EP 1120250 A2 EP1120250 A2 EP 1120250A2 EP 00127029 A EP00127029 A EP 00127029A EP 00127029 A EP00127029 A EP 00127029A EP 1120250 A2 EP1120250 A2 EP 1120250A2
Authority
EP
European Patent Office
Prior art keywords
transport system
guide surface
sensor
printing material
substrate transport
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.)
Granted
Application number
EP00127029A
Other languages
German (de)
English (en)
Other versions
EP1120250A3 (fr
EP1120250B1 (fr
Inventor
Andreas Henn
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 EP1120250A2 publication Critical patent/EP1120250A2/fr
Publication of EP1120250A3 publication Critical patent/EP1120250A3/fr
Application granted granted Critical
Publication of EP1120250B1 publication Critical patent/EP1120250B1/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
    • B41F22/00—Means preventing smudging of machine parts or printed articles

Definitions

  • the present invention relates to a printing material transport system for a Printing press.
  • Such transport systems are used to print a substrate, in particular individual sheets of printing material, from a printing unit To move multicolour printing presses to the next, sheets to be printed on both sides to turn, or to put finished printed sheets.
  • Transport systems Due to the fast working cycles of modern printing machines, such Transport systems will be able to print the substrate at speeds of several Can be transported at 10 km / h without smearing freshly printed ink.
  • To the To protect color it is desirable to protect the substrate at its edges, if necessary hold with grippers, but otherwise transport without contact can. Therefore, transport systems have been developed in which the substrate is attached is transported along a guide surface and between the guide surface and the An air cushion is created which is used to make contacts between the two to avoid. This is not always possible with satisfactory certainty. If the Substrate has low stiffness, it tends to flutter when transported quickly, and can thus come into contact with the guide surface. If the substrate has a great rigidity, this can lead to contact with the guide surface on curved Guide the transport route.
  • a substrate transport system for a printing press with at least one printing surface and Means for creating an air cushion between the guide surface and the printing material proposed that the at least one sensor arrangement for detecting the distance between Substrate and guide surface and control means, which are able to the strength of the To control or regulate the air cushion based on the detected distance in such a way that the air cushion Sensor detected distance comes to lie in a target range.
  • the guide surface can be in the form of sheets, plates and The same can be carried out, the guide surface for pneumatic distance control of a sheet has blowing and / or suction air openings.
  • the air cushion or carrying Air cushions can also exist between brackets, pipes or the like, the in With respect to the curved surface, narrow surfaces are part of said guide surface.
  • any sensor e.g. B. after optical or pneumatic principle working, used from the side acts where the supporting air cushion.
  • the sensor arrangement preferably comprises one arranged on the guide surface itself Sensor.
  • a sensor should be as small as possible, in particular as flat as possible, so that it can be arranged on the guide surface without having to transport the substrate to disturb. These requirements can be met particularly well by a capacitive sensor.
  • a capacitive sensor can essentially consist of thin, glued onto the guide surface be made of metallic and insulating films.
  • the senor preferably has one measuring electrode and one the shield electrode surrounding the insulated electrode.
  • These electrodes can each be supplied with AC signals by a control circuit are, with phase and amplitude of the two AC signals relative to each other be regulated by the control circuit so that the electrical field of the measuring electrode up to a typical measuring distance essentially perpendicular to the measuring electrode stands.
  • This essentially means one from the measuring electrode to the measuring location constant strength of the electric field and consequently a linear one Characteristic of the sensor guaranteed.
  • gripper bridges are usually used, which extend essentially across the width of the printing press, a Hold the sheet to be conveyed at its front edge and pull it behind you.
  • a timing circuit is provided which is connected to the duty cycle of the printing press coupled synchronization signal receives and ensures that none Distance detection takes place when a gripper bridge is in the detection area of the Sensor is located.
  • Transfer drums 1, 2 accept one to be printed Sheets from an upstream printing unit and transfer it to one Impression cylinder 3. On this the sheet runs through a gap between Impression cylinder 3 and blanket cylinder 4, in which it is printed and is then passed to a transport system that has a plurality of on endless Chains 5 guided gripper bridges 6 includes.
  • the chains run in Figure 1 in Clockwise, and transport printed sheets on their underside hanging on a boom stack 8.
  • a working with infrared or UV radiation Dryer 7 is arranged on the transport system so that its radiation is the last one printed top of each sheet falls.
  • the nozzle (not visible in FIG. 1) Perforations of the guide surface 10 open onto compressed air boxes 11, of which the one in FIG shown system two are present. These are from a pump 12 via control valves 13 supplied with compressed air. The degree of opening of the control valves 13 is by a electronic control circuit adjustable, which is not shown in Figure 1 and on the Working method will be discussed later.
  • Figure 2 shows a detail of the guide surface 11.
  • the guide surface consists of a flat sheet with perforations 9 formed therein (transport nozzles) which on one open under the guide surface compressed air box 11.
  • the three from one Metal foil formed, mutually insulated, concentric electrodes 14,15,16 carries.
  • the innermost of the three, 14, represents a measuring electrode, it is ring-shaped from the Shield electrode 15 and the ground electrode 16 surrounded.
  • the electrodes 14, 15, 16, shield electrodes 15 and Ground electrodes are also other shapes, such as. B. rectangular shapes can be used.
  • the thickness of the electrodes is only a few micrometers.
  • the three electrodes are over pressure contacts 21 insulated from the guide surface 10 at outputs of each Control circuit 17 connected to a circuit board 18 at the bottom of the Guide surface 10 is mounted inside the compressed air box 11.
  • a printing material sheet 19 pulled by gripper bridges over the guide surface 10 forms together with the measuring electrode 14 a capacitor, the capacitance of which depends on the distance between the sheet 19 and the measuring electrode 14.
  • ground electrode shown in FIG. 2 and surrounding the shield electrode 15 in a ring 16 can also be omitted if the electrically conductive guide surface 10 is in its place Ground potential is kept.
  • the control circuit generates a first AC voltage signal by impressing an alternating current of a predetermined strength and frequency on the measuring electrode 14.
  • the voltage amplitude of this signal is proportional to the reactance Xc of the plate capacitor.
  • A is the area of the measuring electrode 14.
  • a second AC signal, which is applied to the shield electrode 15, is from the control circuit 17 with the aid of a voltage follower from the first AC voltage signal generated.
  • the measured AC voltage amplitude is in the control circuit 17 with a Limit compared. If the limit is undershot, it means that the Arc 19 of the guide surface 10 is closer than allowed. In such a case, controlled by the control circuit 17, the performance of the pump or the degree of opening of the the respective compressed air supply valve 13 increased to that of the Air cushions formed between the perforations 9 emerging compressed air between the guide surface 10 and the bow 19 to reinforce and so bring it to a greater distance. Conversely, the thickness of the air cushion is reduced when the measured distance exceeds a second limit.
  • the arrangement as a two-point controller system is formed, that is, the measured value is compared with a limit value. Is If the limit is reached or exceeded, the air cushion is reinforced accordingly or reduced.
  • a Controller with a specified setpoint. This represents a particularly high quality
  • the distance X between the arches 19 and the guide surface 10 is defined as the target value.
  • the deviation from the setpoint position is determined as ⁇ ⁇ X.
  • the actuator of the controller is preferably adjusted in proportion to the deviation ⁇ ⁇ X.
  • control circuit 17 can use an AC voltage with a predetermined frequency and amplitude and measure the strength of the resulting alternating current.
  • the key to capturing is that values of voltage and current, either predefined or measured, are present, which allow conclusions to be drawn about the reactance of the Allow capacitor.
  • the sensor from FIG. 2 essentially only consists of two layers of thin foils is built up and therefore has a thickness in the range of millimeter fractions he the air flow conditions between the guide surface and one above transported sheets not noticeably. Such a sensor arrangement can therefore also be used in existing transport systems for printing presses without difficulty be retrofitted.
  • control circuit 17 is connected to one Angle encoder coupled to any drum that is synchronized with the machine cycle the printing press can be mounted and the control circuit 17 Synchronization signal delivers.
  • This enables the control circuit 17 to record prevent distance measurements whenever a gripper bridge Passed sensor that would falsify the measurement results.
  • the Measured value recording can be prevented when there is no sheet 19 in front of the sensor located.
  • This requires that the control circuit 17 in addition to Synchronization signal information about the length of each sheet processed receives. This temporary suppression of the measured value recording makes it easier subsequent processing of the measured values; in particular a characteristic value formation z. B.
  • Sensor arrangements of the type described with reference to FIG. 2 can be in one Transport system of a printing press can be provided at various points to get there regulate the strength of the air cushions locally. You can not only on the boom Use, as shown in Figure 1, but also when transporting the Substrate between two printing units of a machine, or one in the sheet turner Printing press.

Landscapes

  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Discharge By Other Means (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
EP00127029A 2000-01-27 2000-12-09 Système de transport pour une machine à imprimer Expired - Lifetime EP1120250B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10003352A DE10003352A1 (de) 2000-01-27 2000-01-27 Transportsystem für eine Druckmaschine
DE10003352 2000-01-27

Publications (3)

Publication Number Publication Date
EP1120250A2 true EP1120250A2 (fr) 2001-08-01
EP1120250A3 EP1120250A3 (fr) 2002-05-22
EP1120250B1 EP1120250B1 (fr) 2007-06-13

Family

ID=7628802

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00127029A Expired - Lifetime EP1120250B1 (fr) 2000-01-27 2000-12-09 Système de transport pour une machine à imprimer

Country Status (5)

Country Link
US (1) US20010018871A1 (fr)
EP (1) EP1120250B1 (fr)
JP (1) JP2001240283A (fr)
AT (1) ATE364504T1 (fr)
DE (2) DE10003352A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10151423B4 (de) * 2000-10-26 2014-07-24 Heidelberger Druckmaschinen Ag Vorrichtung zur Einstellung eines einen Bogentransport beeinflussenden Luftstroms in einer Druckmaschine, und entsprechendes Verfahren
US20060133085A1 (en) * 2004-12-16 2006-06-22 Heidelberger Druckmaschinen Ag Device for setting a spacing of a sheet from a guide during conveying through a printing technology machine
DE102005056544B4 (de) * 2004-12-21 2016-06-02 Heidelberger Druckmaschinen Ag Verfahren zur zyklischen Förderung von Bogen durch eine drucktechnische Maschine
JP2006175862A (ja) 2004-12-21 2006-07-06 Heidelberger Druckmas Ag 枚葉紙を、印刷技術機械内を周期的に搬送する方法
DE102005024992B4 (de) * 2005-06-01 2007-02-08 Heidelberger Druckmaschinen Ag Verfahren und Vorrichtung zum Fördern eines Bogens durch eine drucktechnische Maschine
CN1944048A (zh) 2005-09-21 2007-04-11 海德堡印刷机械股份公司 用于输送页张的方法和用于执行该方法的装置
DE102006037248B4 (de) * 2006-08-09 2021-01-14 manroland sheetfed GmbH Falschbogensensor einer Druckbogen verarbeitenden Maschine
DE102010003046A1 (de) * 2010-03-19 2011-09-22 Koenig & Bauer Aktiengesellschaft Vorrichtung und Verfahren zum Führen eines Bogens unter Inline-Messsystemen
DE102011003962A1 (de) * 2011-02-11 2012-08-16 manroland sheetfed GmbH Bogentransportvorrichtung in einer Verarbeitungsmaschine und Verfahren zum Führen von Bogenmaterial

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1449656A1 (de) * 1961-12-02 1968-11-21 Svenska Flaektfabriken Ab Vorrichtung zum flatterfrei schwebenden Tragen von vorzugsweise bahnartigem Flachmaterial
DE4328445A1 (de) * 1993-08-24 1995-03-02 Heidelberger Druckmasch Ag Vorrichtung zum Fördern von Bogen auf einen Stapel
DE19549351A1 (de) * 1995-10-12 1997-04-17 Leuze Electronic Gmbh & Co Vorrichtung zur Kontrolle von Bögen
DE19730042A1 (de) * 1997-07-14 1999-01-21 Roland Man Druckmasch Vorrichtung zur Regelung der Blas- und/oder Saugluftrate in einer Bogendruckmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3411029A1 (de) * 1984-03-24 1985-10-03 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum fuehren von ein- und beidseitig bedruckten bogen
CH685214A5 (fr) * 1991-10-15 1995-04-28 Hans Ulrich Meyer Capteur capacitif de position.
JP3442871B2 (ja) * 1994-07-19 2003-09-02 インタクト株式会社 静電容量計を用いた厚みまたは変位測定装置、および静電容量計を用いた厚みまたは変位測定方法
JPH10330003A (ja) * 1997-05-30 1998-12-15 Kawasaki Steel Corp 帯状材の非接触移送装置
EP0899228B1 (fr) * 1997-08-28 2004-04-14 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif de guidage à coussin d'air

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1449656A1 (de) * 1961-12-02 1968-11-21 Svenska Flaektfabriken Ab Vorrichtung zum flatterfrei schwebenden Tragen von vorzugsweise bahnartigem Flachmaterial
DE4328445A1 (de) * 1993-08-24 1995-03-02 Heidelberger Druckmasch Ag Vorrichtung zum Fördern von Bogen auf einen Stapel
DE19549351A1 (de) * 1995-10-12 1997-04-17 Leuze Electronic Gmbh & Co Vorrichtung zur Kontrolle von Bögen
DE19730042A1 (de) * 1997-07-14 1999-01-21 Roland Man Druckmasch Vorrichtung zur Regelung der Blas- und/oder Saugluftrate in einer Bogendruckmaschine

Also Published As

Publication number Publication date
ATE364504T1 (de) 2007-07-15
DE10003352A1 (de) 2001-08-02
US20010018871A1 (en) 2001-09-06
EP1120250A3 (fr) 2002-05-22
JP2001240283A (ja) 2001-09-04
DE50014408D1 (de) 2007-07-26
EP1120250B1 (fr) 2007-06-13

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