EP0895860A2 - Dispositif pour éviter des détériorations d'un élement d'impression - Google Patents

Dispositif pour éviter des détériorations d'un élement d'impression Download PDF

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Publication number
EP0895860A2
EP0895860A2 EP98113629A EP98113629A EP0895860A2 EP 0895860 A2 EP0895860 A2 EP 0895860A2 EP 98113629 A EP98113629 A EP 98113629A EP 98113629 A EP98113629 A EP 98113629A EP 0895860 A2 EP0895860 A2 EP 0895860A2
Authority
EP
European Patent Office
Prior art keywords
web
error detection
observation
printing
deflection
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
EP98113629A
Other languages
German (de)
English (en)
Other versions
EP0895860B1 (fr
EP0895860A3 (fr
Inventor
Andreas Birkenfeld
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.)
Baldwin Germany GmbH
Original Assignee
Baldwin Grafotec GmbH
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Filing date
Publication date
Application filed by Baldwin Grafotec GmbH filed Critical Baldwin Grafotec GmbH
Publication of EP0895860A2 publication Critical patent/EP0895860A2/fr
Publication of EP0895860A3 publication Critical patent/EP0895860A3/fr
Application granted granted Critical
Publication of EP0895860B1 publication Critical patent/EP0895860B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
    • B65H26/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs
    • B65H26/025—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs responsive to web breakage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/18—Web break detection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/12—Means using fluid made only for exhausting gaseous medium producing gas blast
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
    • B65H2553/41—Photoelectric detectors

Definitions

  • the invention relates to a device for preventing damage to the printing unit in a web-fed rotary printing press that is one of a roll that is on a reel changer is recorded, printed web printed, an error detector device is provided, one in the area of both web edges Deflection device, by means of which a train train runs smoothly deflectable force that can be overcome and acts transversely to the transport plane of the web and has a change-observing device.
  • a device of this type is known from EP 429 970 B1.
  • the arrangement is a web break switch arranged after the printing units to trigger one between the last printing unit and the dryer arranged webbing safety device.
  • the known device is based on the fact that In the event of a web break, the web tension is eliminated, so that a deflection of the web is generated, which is determined by the observation devices.
  • These are formed as light barriers, whose optical axis in the direction of the width of the web is inclined and cut from the edge area of the web during trouble-free operation becomes.
  • a light barrier only reports "yes" or "no". This is enough for one Web tear switch downstream of printing units.
  • experience has shown that the web entering the printing units in particular by Adhesive defects in the area of the connection between the old and new web and / or Transport damage caused by side defects can cause that too unilateral winders can run on a printing unit roller.
  • the error detection device is arranged in front of the first printing unit and that each of the two Observation devices of the error detection device designed as an optical sensor is, in each case, a signal which is dependent on the shading caused by the path outputs and its optical axis opposite to the transport level of the web in substantially perpendicular direction of the deflection force at least in the longitudinal direction of the Web is tilted.
  • the device according to the invention advantageously recognizes due to the specific Design and arrangement of the sensors both when changing roles caused lateral web misalignment as well as lateral defects like an incomplete one Adhesion of the overlapping web ends or still closed small tears.
  • the optical axis of the sensors is inclined in the longitudinal direction of the web, the Sensors in an advantageous manner by means of the respectively assigned deflection device Look through the open column between the overlapping web ends.
  • the optical sensors are dependent on the degree of shading, that is to say an amount-dependent Generate signal, a tolerance band can be specified in an advantageous manner within which fluctuations are tolerated. It also enables this advantageously also a detection of what error is present, what the prerequisite for taking a suitable remedy.
  • the deflection device at least two arranged on different sides of the web, in the longitudinal direction the web offset from each other, preferably designed as blowing nozzles having. This ensures that overlapping web ends can be reliably lifted from each other in the event of poor adhesion.
  • the observation device can preferably be designed as a fiber-optic sensor be connected to a control device via a fiber bundle.
  • Fiber optic Sensors are cheap, robust and advantageously not temperature-dependent Elements that are available in different widths, so that an adjustment of the detection area to the circumstances of the individual case in a simple manner is possible. Because here a line of light from and to a control device Is possible over a greater distance, there are no electrical directly on the track or electronic equipment required so that no interference from static Discharges are to be feared.
  • the observation device can each be operated in a compressed air with an exit slot facing the web be arranged. This advantageously results in an air purge optical elements and thus preventing pollution of these elements, which has a positive effect on reliability and freedom from maintenance.
  • the observation facilities can further develop the higher-level measures each with an associated deflection device on one side adjustable, preferably motor-driven and by means of Control device controllable carriage can be added. This advantageously allows Way an automatic adjustment of the elements of the error detection device and thus ensures a high level of user friendliness.
  • Figure 1 shows a first Printing unit 1 of a web-fed rotary printing press, which has one unwound from a web 2 Lane 3 is fed. The roll 2 is taken up on a roll changer 4, which enables an automatic roll change to be carried out.
  • the first printing unit 1 is a web 3 run through Fault detection device 5 upstream. This is as close as possible to the reel changer 4, arranged approximately in the area of the exit of the reel changer 4, so that between the passage of a web defect through the fault detection device and the entry of this defect into the first printing unit 1 as much time as possible stands to initiate appropriate measures. If a defect in web 3 is detected the cylinders of all printing units of the web-fed rotary printing press are Brought printing off, so that the faulty location of the web 3 without cylinder contact goes through.
  • a waste gate is provided for the downstream folder, this will be opened so that the web area containing the defect is discarded.
  • a waste gate is provided for the downstream folder, this will be opened so that the web area containing the defect is discarded.
  • Provided set up the web-fed rotary printing press for so-called continuous printing washing is where the washing liquid and the paint detached from it through the web are carried away, the implementation of such a washing process prevented during an error run.
  • a web safety device is provided which is usually between the last printing unit and the subordinate one Dryer is arranged, and provided that the activation of the safety gear Web break switch is designed so that it passes through a web defect mentioned above, this response is also suppressed.
  • Detection units 6 are provided in the area of both web edges, which according to FIG in each case an observation device 7 and a deflection device assigned to it 8 included.
  • the deflection device 8 consists of two in the example shown arranged above or below the web 3, in the longitudinal direction of the web 3 offset organs. These are here to be acted upon with compressed air Blower nozzles designed to provide a non-contact deflection of a voltage-free Enable web area. The use of suction nozzles would also be conceivable.
  • the blowing nozzles forming the deflection device 8 are perpendicular to the Transport plane of the web 3 extending axis arranged.
  • the observation device 7 is designed as an optical sensor, which in each case consists of two elements arranged above or below the web 3 inform of the transmitter 7a and receiver 7b.
  • the optical axis a of the observation device 7 optical sensor is at least in the longitudinal direction of the web opposite the to the web plane essentially perpendicular to the direction through the deflection device 8 generated deflection force tilted, as Figure 1 clearly shows.
  • a tilt angle of 60 ° has proven to be useful in experiments.
  • a Tilt can be provided in the direction of the width of the web.
  • the optical axis a Provided when changing roles the new sheet is glued to the old sheet from the bottom is the optical axis a with its upper area against the running direction of the web tipped back and vice versa.
  • the arrangement tilted in the longitudinal direction of the web 3 of the sensor forming the observation device 7 ensures that the optical Axis a is a gap 9 opened by the deflection device 8 between one another can penetrate overlapping web ends, as Figure 1 clearly shows.
  • the optical axis a was in a plane perpendicular to the orbital plane, the Gap 9 may not be penetrated due to overlap still present.
  • the optical sensors provided to form the observation device 7 are expediently designed as fiber optic sensors, their transmitters or receivers are arranged at the end of a light guide 10 formed by a fiber bundle, as can be seen from Figure 3.
  • the elements of the observation device 7 are over its light guide 10, as shown in FIG. 2, is connected to a control device 11 which those for generating the emitted light and for processing the received Contains light required electrical and electronic equipment.
  • the Control device 11, a computer for processing the incoming signals has sufficient distance from the web 3 so that electrostatic discharges do not cause interference to the electrical and electronic elements can.
  • the fiber bundle forming the light guide 10 runs, as shown in FIG. 3, in a housing 12 having a slot 13 facing the web 3, which as Light exit slit or light entry slit acts.
  • the housing ends of the Optical fibers are inform a single or multi-line, the slot 13 assigned Row 14 arranged so that 13 emits light through the slot or can be received.
  • the chamber 15 delimited by the housing 12 is, as can be seen from FIG. 4, with provided with a compressed air connection 16 and pressurized with compressed air. This exits through the slot 13, being purge air at the ends of the row 14 forming optical fibers flow past and keep them clean. Resulting from this high functional reliability and maintenance-free operation.
  • the fiber rows 14 of the transmitter and receiver of the sensors are exactly on top of each other aligned.
  • the receiver is through the path 3 partially covered and therefore only receives part of that from the assigned transmitter emitted light.
  • the basic setting of the detection units 6 is such that in the area of the two web edges in each case 50% of the light is shadowed.
  • the sled 17 are useful mechanically adjustable, such as by a motor 18 and one driven therefrom indicated in engagement with the associated carriage 17 spindle drive 19 is.
  • the motors 18 can be controlled by means of the control device 11.
  • the positioning the detection units 6 take place when the printing press is already running, useful during the start-up phase. After positioning, the Evaluation of the sensor signals released. This can be done manually from Control panel 20 of the printing press can be initiated, such as through a signal line 21 is indicated. But also an automatic release after positioning is completed could be possible.
  • the commands formed by evaluating the sensor signals to initiate the processes already described above, such as "printing from” etc., are transferred from the control device 11 to the printing press control, as indicated by the signal line 22.
  • the control device 11 is also assigned a memory 23, by means of which the temporal signal curve is logged and is thus comprehensibly recorded.
  • FIG. 5 shows the course of the intensity I of the sensors S1 or S2 generated signals over time t, the signal curves in three columns I, II, III of three selected cases are shown below each Signal curve are indicated.
  • Column I is based on a normal web run.
  • the sensors S1, S2 assigned to the two web edges remain here emitted signals within the set tolerance band 24.
  • the width of the tolerance band 24 is dependent on individual boundary conditions, e.g. adjustable depending on the machine. Also different widths in the area both machine sides are conceivable in this context.
  • the column III of FIG. 5 is the case for one one-sided defect of the web 3. This can be an incomplete one Adhesion in the area of the joint between two successive webs or around a minor side crack etc., which can be attributed to transport damage etc. is act. In this case, only the signal of the person detecting the defect moves Sensor S1 out of the tolerance band 24, which also triggers of an order.
  • the error detection device 5 is continuous from the release until it is switched off active. Accordingly, the ones forming the observation devices 7 Sensors are permanently exposed to light and which form the deflection devices 8 Compressed air permanently applied to nozzles. The one exerted by the compressed air Of course, the pressure is at a level that none with normal train trains Deflection results.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
EP98113629A 1997-08-07 1998-07-22 Dispositif pour éviter des détériorations d'un élement d'impression Expired - Lifetime EP0895860B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19734137A DE19734137C2 (de) 1997-08-07 1997-08-07 Vorrichtung zur Verhinderung von Druckwerksbeschädigungen
DE19734137 1997-08-07

Publications (3)

Publication Number Publication Date
EP0895860A2 true EP0895860A2 (fr) 1999-02-10
EP0895860A3 EP0895860A3 (fr) 1999-06-16
EP0895860B1 EP0895860B1 (fr) 2002-10-23

Family

ID=7838221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98113629A Expired - Lifetime EP0895860B1 (fr) 1997-08-07 1998-07-22 Dispositif pour éviter des détériorations d'un élement d'impression

Country Status (5)

Country Link
US (1) US5947024A (fr)
EP (1) EP0895860B1 (fr)
JP (1) JPH11115161A (fr)
CN (1) CN1089688C (fr)
DE (2) DE19734137C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1760019A3 (fr) * 2005-09-03 2007-07-18 Baldwin Germany GmbH Dispositif de surveillance des ruptures de bande dans une machine rotative d'impression

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10256312A1 (de) * 2002-12-03 2004-06-17 Man Roland Druckmaschinen Ag Zustands-Informations-System zur Messwerterfassung bei der Erzeugung, Bearbeitung oder Verarbeitung eines Materials, insbesondere bei einer Bedruckstoffbahn in einer Rollenrotationsdruckmaschine
DE10327910B4 (de) * 2003-06-20 2012-01-26 Baldwin Germany Gmbh Bahnfangvorrichtung
DE102004017676B4 (de) * 2004-04-10 2008-09-11 Baldwin Germany Gmbh Fehlererfassungsvorrichtung einer Rollenrotations-Druckmaschine
JP4651968B2 (ja) * 2004-04-27 2011-03-16 東北リコー株式会社 印刷装置
JP2007307889A (ja) * 2006-04-19 2007-11-29 Komori Corp 印刷機のウェブ検出装置
DE102006050906B3 (de) * 2006-10-28 2008-05-29 Baldwin Germany Gmbh Automatische Bahnfangvorrichtung für Rollenrotationsdruckmaschinen
SE535634C2 (sv) 2010-11-16 2012-10-23 Andritz Tech & Asset Man Gmbh Cellulosatork som har nedre blåslådor samt förfarande för torkning av en bana av cellulosamassa
CN104290431A (zh) * 2014-11-07 2015-01-21 合肥大安印刷有限责任公司 断纸截止机构

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2033219A1 (de) * 1969-07-07 1971-02-18 Literty Sheet Metal Engineerin Vorrichtung zur Überwachung von Bandmaterial u dgl. Annτ Liberty Sheet Metal Engineering Co Ltd., Bedford (Großbritannien)
DE3640101A1 (de) * 1985-12-13 1987-06-19 Polygraph Leipzig Sicherheitsvorrichtung zum steuern einer rollenrotationsdruckmaschine
JPH01231749A (ja) * 1988-03-09 1989-09-18 Yokohama Rubber Co Ltd:The 帯状材料の継目段違い量検出方法
EP0429970A2 (fr) * 1989-11-28 1991-06-05 Grafotec Kotterer Gmbh Commutateur pour rupture de bande
US5289007A (en) * 1992-05-26 1994-02-22 Beloit Technologies, Inc. Sheet break detector apparatus
US5389795A (en) * 1991-02-11 1995-02-14 Rye; Timothy W. Method and apparatus for directing air and optical signals to detect edge cracks and other absences of product
DE19647419A1 (de) * 1995-11-17 1997-05-22 Hitachi Koki Kk Elektrofotografisches Gerät, Papierdetektor dafür und Papiererfassungsverfahren dafür

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906232A (en) * 1973-10-31 1975-09-16 Butler Automatic Inc Web break detector
US3928844A (en) * 1974-06-17 1975-12-23 Butler Automatic Inc Web break detector system
DE2701992A1 (de) * 1977-01-19 1978-07-27 Heinz Walter Anordnung zur ueberwachung des laufes von insbesondere papierbahnen an druckmaschinen
US4335316A (en) * 1980-04-09 1982-06-15 Baldwin-Korthe Web Controls, Inc. Web break detector with adjustable scanning head
US5036706A (en) * 1989-08-08 1991-08-06 Web Printing Controls Co., Inc. Sonic web break detector
US5190201A (en) * 1991-01-16 1993-03-02 Quad/Tech, Inc. Method and apparatus for detecting the presence of a web within a web dryer
DE4216653C2 (de) * 1992-05-20 1995-12-21 Voith Gmbh J M Abrißüberwachungseinrichtung für Papierbahnen
US5678484A (en) * 1993-03-25 1997-10-21 Baldwin Web Controls Anti-wrap device for a web press
US5652388A (en) * 1995-08-21 1997-07-29 Baldwin Web Controls Apparatus and method for detecting printing press web breakage

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2033219A1 (de) * 1969-07-07 1971-02-18 Literty Sheet Metal Engineerin Vorrichtung zur Überwachung von Bandmaterial u dgl. Annτ Liberty Sheet Metal Engineering Co Ltd., Bedford (Großbritannien)
DE3640101A1 (de) * 1985-12-13 1987-06-19 Polygraph Leipzig Sicherheitsvorrichtung zum steuern einer rollenrotationsdruckmaschine
JPH01231749A (ja) * 1988-03-09 1989-09-18 Yokohama Rubber Co Ltd:The 帯状材料の継目段違い量検出方法
EP0429970A2 (fr) * 1989-11-28 1991-06-05 Grafotec Kotterer Gmbh Commutateur pour rupture de bande
US5389795A (en) * 1991-02-11 1995-02-14 Rye; Timothy W. Method and apparatus for directing air and optical signals to detect edge cracks and other absences of product
US5289007A (en) * 1992-05-26 1994-02-22 Beloit Technologies, Inc. Sheet break detector apparatus
DE19647419A1 (de) * 1995-11-17 1997-05-22 Hitachi Koki Kk Elektrofotografisches Gerät, Papierdetektor dafür und Papiererfassungsverfahren dafür

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 559 (M-905), 12. Dezember 1989 & JP 01 231749 A (YOKOHAMA RUBBER CO LTD:THE), 18. September 1989 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1760019A3 (fr) * 2005-09-03 2007-07-18 Baldwin Germany GmbH Dispositif de surveillance des ruptures de bande dans une machine rotative d'impression

Also Published As

Publication number Publication date
DE19734137C2 (de) 2001-07-12
EP0895860B1 (fr) 2002-10-23
DE19734137A1 (de) 1999-02-18
CN1089688C (zh) 2002-08-28
US5947024A (en) 1999-09-07
EP0895860A3 (fr) 1999-06-16
DE59806021D1 (de) 2002-11-28
JPH11115161A (ja) 1999-04-27
CN1210072A (zh) 1999-03-10

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