EP0895860B1 - 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
EP0895860B1
EP0895860B1 EP98113629A EP98113629A EP0895860B1 EP 0895860 B1 EP0895860 B1 EP 0895860B1 EP 98113629 A EP98113629 A EP 98113629A EP 98113629 A EP98113629 A EP 98113629A EP 0895860 B1 EP0895860 B1 EP 0895860B1
Authority
EP
European Patent Office
Prior art keywords
web
proceding
monitors
controller
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.)
Expired - Lifetime
Application number
EP98113629A
Other languages
German (de)
English (en)
Other versions
EP0895860A3 (fr
EP0895860A2 (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 Germany GmbH
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 Baldwin Germany GmbH filed Critical Baldwin Germany 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 the detection of Web defects to prevent damage to the printing unit in a web-fed rotary printing press that is one of a roll that fed on a reel changer, fed web printed, in which an error detection device is provided, which each have a deflection device in the area of both web edges, by means of one with trouble-free operation of the train surmountable, acting transversely to the transport level of the train Deflection force can be generated, and one change each Detecting observation device, the optical Axis essentially opposite to the transport plane of the train perpendicular direction of the deflection force at least in the longitudinal direction the web is tilted, the two observation devices the error detection device as fiber optic sensors are trained.
  • Such a device is known from US-A 5 389 795. at this known arrangement is the observation device practically designed as a light barrier, in which a between Transmitter and receiver, linear light beam is produced. This is from an undamaged track interrupted and intervenes in the event of a train damage Transmitter and receiver through. The known arrangement is therefore able to generate a yes-no signal.
  • the transmitters and receivers of the fiber optic sensors in one that can be pressurized with compressed air, with a small nozzle-shaped opening provided the housing of each assigned deflection device arranged.
  • DE-A 36 40 101 shows a device for preventing Damage to printing unit in a web-fed rotary printing press with an error detection device that before the first Printing unit is arranged.
  • the Fault detection device in front of the first printing unit Rotary printing press is arranged that the fiber-optic sensors of the error detection device Output a signal dependent on the shadowing caused by the web and that the the transmitter and receiver of the fiber optic Optical fiber fibers forming sensors each inform of elongated Rows of fibers in a slot facing one of the web provided, own housing, the end with compressed air is acted upon as at the ends of the fiber rows Flushing purge air escapes through the slot.
  • the Design of the elements of the fiber optic according to the invention Sensors advantageously results in a wide band of light that the web is more or less shadowed.
  • the flushing of the fiber ends of transmitter and receiver arranged in rows the fiber optic sensors with compressed air, which with the for Deflection of the web used compressed air has nothing to do enables reliable flushing and keeping the Fiber ends so that the width of the light band even with robust Operating conditions due to pollution etc. not can be affected. From the degree of shadowing wide strips of light through the web is therefore the size of everyone relevant, lateral web defects and in particular also the Previously very feared glue errors can be recorded directly in terms of amount.
  • the measures according to the invention accordingly offer in advantageously guarantee that not only found is that there is an error at all, but also which one Errors, so that the initiation is more appropriate in each individual case Remedial action is possible. Since the invention Measures depending on the degree of shadowing, i.e. a can generate an amount-dependent signal in an advantageous manner a tolerance band can also be permitted within which Fluctuations are tolerated. Since the detection device according to the invention even before the first Printing unit is arranged and web defects, which are usually in the amount of the first pressure wave could lead to side winders recognizes, can be traced back to this Avoid damage to the printing unit reliably.
  • the structure and mode of operation of web-fed rotary printing presses as well as this parent Role changers are known per se and therefore require in no further explanation in the present context.
  • the Figure 1 shows a first printing unit 1 Web-fed rotary printing press, one of which is unwound from a roll 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 passes.
  • 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. By in the longitudinal direction the web offset arrangement are overlapping web ends that have no fixed mutual connection, reliably stand out, is clearly shown in Figure 1. This creates a gap 9 through which the observation device 7 can look through.
  • 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 would run 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 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 logged and thus recorded in a traceable manner.
  • 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. machine-dependent, adjustable. 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 lateral 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)

Claims (10)

  1. Dispositif de détection de défauts de bande afin d'éviter des détériorations d'un élément d'impression dans une presse rotative à imprimer qui imprime une bande (3) amenée par un rouleau (2) qui est reçu sur un changeur de rouleaux (4), dans lequel on prévoit un dispositif de détection de défauts (5) qui présente dans la zone des deux bords de la bande respectivement un dispositif de déviation (8) au moyen duquel on peut générer une force de déviation qui, en service sans trouble, peut être vaincue par la tension à laquelle la bande est soumise, et qui agit transversalement au plan de transport de la bande (3), ainsi que respectivement un dispositif d'observation (7) qui constate des changements et dont l'axe optique (a) est basculé par rapport à la direction de la force de déviation, qui est pour l'essentiel perpendiculaire au plan de transport de la bande (3), au moins dans la direction longitudinale de la bande (3), les deux dispositifs d'observation (7) du dispositif de détection de défauts (5) étant réalisés comme palpeurs à fibres optiques (S1, S2), caractérisé par le fait que le dispositif de détection de défauts (5) est disposé en amont du premier élément d'impression (1) de la presse rotative à imprimer, que lesdits palpeurs à fibres optiques (S1, S2) du dispositif de détection de défauts (5) émettent respectivement un signal dépendant de l'ombrage par la bande (3), et que les fibres optiques formant les émetteurs et les récepteurs des palpeurs à fibres optiques (S1, S2) se terminent respectivement sous forme de rangées longitudinales de fibres (14) dans un propre boítier (12) pourvu d'une fente (13) montrant vers la bande (3), ledit boítier pouvant être alimenté en air comprimé qui s'échappe par la fente (13) comme air de balayage passant devant les extrémités des rangées de fibres (14).
  2. Dispositif selon la revendication 1, caractérisé par le fait que le dispositif de détection de défauts (5) est disposé dans la zone du changeur de rouleaux (4), de préférence dans la zone de la sortie du changeur de rouleaux (4).
  3. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que le dispositif de déviation (8) présente au moins deux organes de déviation qui sont disposés de côtés différents de la bande (3) et décalés l'un contre l'autre dans la direction longitudinale de la bande (3) et qui, de préférence, sont réalisés comme buses soufflantes qui peuvent être alimentées en air comprimé.
  4. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que le signal émis respectivement par le dispositif d'observation (7) est un signal analogique.
  5. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que les éléments des dispositifs d'observation (7) sont reliés par un faisceau de fibres (10) à un dispositif de commande (11) qui présente un ordinateur destiné à traiter les signaux qui arrivent.
  6. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que l'axe optique (a) des palpeurs à fibres optiques (S1, S2) présente un angle d'inclinaison de 60°.
  7. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que les éléments d'émission ou bien de réception des dispositifs d'observation (7) sont réglés de telle manière que, en service sans trouble, la bande (3) obscurcit une partie, de préférence 50 % de la lumière émise par l'émetteur.
  8. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que les dispositifs d'observation (7) avec le dispositif de déviation (8) respectivement associé forment des unités de détection (6) qui, de préférence, sont reçues respectivement sur un glissoir (17) disposé de manière à pouvoir être réglé latéralement, ledit glissoir pouvant être entraíné de préférence par moteur et pouvant être commandé par le biais du dispositif de commande (11).
  9. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que, par le biais du dispositif de commande (11), une instruction de commande pour la machine d'impression peut être sortie lorsqu'une bande de tolérance (24) de largeur de préférence réglable est dépassée par au moins un signal de palpeur (I), c'est par cette instruction de commande que, au moment du passage du défaut, les éléments d'impression peuvent être mis dans l'interruption d'impression et/ou une aiguille de maculature peut être activée et/ou un nettoyage durant l'impression du tirage et/ou une activation d'un dispositif à saisir la bande peut ou bien peuvent être supprimé(s).
  10. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que les défauts détectés au moyen du dispositif de détection de défauts (5) peuvent être pris en procès-verbal de préférence au moyen d'une mémoire (23) associée au dispositif de commande (11).
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 EP0895860A2 (fr) 1999-02-10
EP0895860A3 EP0895860A3 (fr) 1999-06-16
EP0895860B1 true 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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004017676A1 (de) * 2004-04-10 2005-11-03 Baldwin Germany Gmbh Fehlererfassungsvorrichtung einer Rollenrotations-Druckmaschine
EP1760019A2 (fr) 2005-09-03 2007-03-07 Baldwin Germany GmbH Dispositif de surveillance des ruptures de bande dans une machine rotative d'impression

Families Citing this family (7)

* 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
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

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GB1320898A (en) * 1969-07-07 1973-06-20 British Steel Corp Strip measuring unit and split edge detector
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
DD244105A1 (de) * 1985-12-13 1987-03-25 Hank Dietrich Dr Ing Sicherheitsvorrichtung zum steuern einer rollenrotationsdruckmaschine
JPH0651546B2 (ja) * 1988-03-09 1994-07-06 横浜ゴム株式会社 帯状材料の継目段違い量検出方法
US5036706A (en) * 1989-08-08 1991-08-06 Web Printing Controls Co., Inc. Sonic web break detector
DE3939226A1 (de) * 1989-11-28 1991-05-29 Kotterer Grafotec Bahnreissschalter
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
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
DE4216653C2 (de) * 1992-05-20 1995-12-21 Voith Gmbh J M Abrißüberwachungseinrichtung für Papierbahnen
US5289007A (en) * 1992-05-26 1994-02-22 Beloit Technologies, Inc. Sheet break detector apparatus
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
JP3452102B2 (ja) * 1995-11-17 2003-09-29 日立プリンティングソリューションズ株式会社 電子写真装置の用紙検出器

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004017676A1 (de) * 2004-04-10 2005-11-03 Baldwin Germany Gmbh Fehlererfassungsvorrichtung einer Rollenrotations-Druckmaschine
DE102004017676B4 (de) * 2004-04-10 2008-09-11 Baldwin Germany Gmbh Fehlererfassungsvorrichtung einer Rollenrotations-Druckmaschine
EP1760019A2 (fr) 2005-09-03 2007-03-07 Baldwin Germany GmbH Dispositif de surveillance des ruptures de bande dans une machine rotative d'impression
DE102005041919B4 (de) * 2005-09-03 2008-05-29 Baldwin Germany Gmbh Bahnbruch-Überwachungseinrichtung für Rollenrotationsdruckmaschinen

Also Published As

Publication number Publication date
JPH11115161A (ja) 1999-04-27
DE19734137C2 (de) 2001-07-12
CN1089688C (zh) 2002-08-28
CN1210072A (zh) 1999-03-10
DE59806021D1 (de) 2002-11-28
EP0895860A3 (fr) 1999-06-16
EP0895860A2 (fr) 1999-02-10
DE19734137A1 (de) 1999-02-18
US5947024A (en) 1999-09-07

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