EP1513756B1 - Dispositif de detection d'une perturbation dans le defilement d'une bande - Google Patents

Dispositif de detection d'une perturbation dans le defilement d'une bande Download PDF

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Publication number
EP1513756B1
EP1513756B1 EP03760553A EP03760553A EP1513756B1 EP 1513756 B1 EP1513756 B1 EP 1513756B1 EP 03760553 A EP03760553 A EP 03760553A EP 03760553 A EP03760553 A EP 03760553A EP 1513756 B1 EP1513756 B1 EP 1513756B1
Authority
EP
European Patent Office
Prior art keywords
web
sensor
cylinder
running
distance
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
EP03760553A
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German (de)
English (en)
Other versions
EP1513756A1 (fr
Inventor
Helmut Holm
Oliver Frank Hahn
Georg Schneider
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.)
Koenig and Bauer AG
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Koenig and Bauer AG
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Publication of EP1513756A1 publication Critical patent/EP1513756A1/fr
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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

Definitions

  • the invention relates to a device for detecting a running disturbance in a running material web according to the preamble of claim 1.
  • the pressure nip can be opened, whereby an increase in the pressure is interrupted. But it can also be cut through the paper web before the affected gap to interrupt a further inflow of paper. It is also possible to open the printing gap and interrupt the inflow of paper. However, it is important in all cases to quickly detect a paper web break in order to be able to carry out these measures before the occurrence of damage.
  • Photoelectric sensors are used to detect the presence of a paper web.
  • Photocells have the problem that they detect running disturbances quite late, since the break point must first pass the photocell in order to be registered as such become.
  • rewinders in which a normally expiring web is retracted into the printing unit, while at the same time continue to tap paper.
  • the paper web is wound double-layered. Since, on the other hand, the outgoing web is withdrawn, a light barrier arranged behind the printing unit still registers the existence of the paper web. This results in particularly long reaction times from the occurrence of the disturbance to the detection thereof.
  • particularly large amounts of paper are wound on the rotary cylinder
  • rewind locks can not be used with freshly printed wet paper as they exert a squeeze pressure on the web, but this is to be avoided on wet paper.
  • a fast detection of a running disorder can be achieved here only to a limited extent, that many sensors are used close together. This measure is offset by the high cost factor involved in using a large number of sensors.
  • the DE 93 20 409 U1 describes a sensor that detects a distance to a moving material web to detect a web break.
  • the DE 195 06 456 A1 discloses a device for detecting a web break, in which a surface of a plate is detected by means of sensors during the web break.
  • the US 49 66 074 A and the US 45 58 216 A describe devices for detecting a running disturbance of a material web of a running printing machine.
  • a sensor each scans a blanket cylinder of a printing unit, wherein the changing reflection properties of the cylinder are detected in a winder.
  • the DE 43 02 189 A1 discloses a train for a printing press. To detect a paper tear, optical sensors scan a tension roller.
  • the invention has for its object to provide a device for detecting a running disturbance in a running web.
  • a winding occurring after a running disturbance can be detected directly at the place of its occurrence, whereas known devices can detect running disturbances only indirectly as such.
  • Running disturbances are thus recognized by the invention without delay. Because it can be responded to promptly thanks to the rapid recognition of a running disturbance, the machine damage occurring as a result of a running disturbance can be considerably reduced or even completely avoided. Repair costs, as well as the time required for a repair or the restoration of operational readiness of the web-processing machine time are reduced. A further cost reduction is achieved by saving sensors at several points of the web.
  • the device has over known devices such. B. in the DE 38 22 497 A1 described device on the difference that their sensor detects the position of the web quantitatively, both at trouble-free course of the web as well as in the case of a running disorder, while at DE 38 22-497 A1 used as sensors capacitive switch in each case only with excessive approach of the material web to address them, so make only a qualitative statement about whether the material web runs on a regular web path or deviating Materialbahnweg.
  • the device has over the advantage described in the cited document that it requires only one sensor. In addition, simplifies the apparatus design, since the material web does not have to be threaded between two sensors.
  • the embodiment of the device is generally an arbitrary distance sensor, for example an ultrasonic sensor. However, it is preferable to use a triangulation sensor.
  • a reflector arranged in the beam path is provided. Preference is given to a device in which the reflector is a material web leading cylinder.
  • the surface of the cylinder has a structure modulating the scanning signal. Since the cylinder rotates due to the guidance of the material web, the structure is swept periodically by the scanning signal and thus has a modulating effect on the reflected scanning signal.
  • any desired scanning signal can be used in the described alternative embodiments of the device.
  • a light signal is used as a scanning signal.
  • the senor has a transmitter for emitting a scanning signal and a receiver for registering the scanning signal after propagation on a beam path.
  • the sampling signal may be any signal such.
  • a reflector In the beam path of the scanning signal, a reflector may be provided.
  • An embodiment in which the reflector is a cylinder guiding the material web is preferred.
  • a distance sensor such.
  • a triangulation sensor or a push button sensor is an embodiment of the structure of advantage, wherein the structure has recesses on the surface of the cylinder. This may be, for example, one or more trough-shaped depressions or elongated, channel-shaped depressions.
  • the rangefinder measures a varying distance between itself and the cylinder due to the depressions located on the surface of the cylinder. Also in this case leads due to a running disturbance in the area between the cylinder and sensor penetrating or the cylinder winding material web to a change of the detected by the sensor scanning signal, as measured by the sensor distance between the sensor and the cylinder does not change periodically. The sensor recognizes the running disturbance.
  • the devices are used in printing machines.
  • the material web passes through a pressure gap between two cylinders.
  • wrapping one of the cylinders at the exit of the nip During a running disturbance, a course of the material web on a side of the regular material web path facing the looped cylinder is ensured.
  • Such a device prevents the flow of material, and the occurrence of damage due to the running disturbance is prevented or at least limited to the damage possibly caused by the disturbance.
  • FIG. 1 or 2 An embodiment of the invention is in Fig. 1 or 2 shown using the example of a rotary printing machine. It shows Fig. 1 in schematic form a cross section through a printing unit of Rotationsdnittckmaschine.
  • the printing unit consists of a cylinder 01, z. B. impression cylinder 01, a cylinder 02, z. B. transfer cylinder 02 and a cylinder 03, for example, forme cylinder 03.
  • Each of the cylinder 01; 02; 03 rotates in a sense of rotation, which is indicated by an arrow.
  • the impression cylinder 01 and the transfer cylinder 02 are arranged so that there is a pressure gap between them.
  • the form cylinder 03 is located on the transfer cylinder 02.
  • the guide element can be designed, for example, as a guide roll or hedgehog roll or be formed by the pressure nip of a subsequent printing unit.
  • an arrow indicates the running direction of the paper web 06.
  • the paper web 06 runs between the nip and the guide on a straight line.
  • the instantaneous course of the paper web 06 may deviate slightly from the straightness due to irregularities in the course or fluctuations of the material web tension.
  • a regular web path 13 of the paper web 06 which corresponds to an undisturbed functioning of the printing press, therefore, a volume must be assumed transverse to the straight line of finite extent.
  • the boundaries of the regular web path 13 are marked by dashed lines.
  • On both sides of the regular material web path 13 there is a zone into which the paper web 06 may not enter during the operation of the printing machine that interferes with the operation.
  • the paper web 06 runs on a regular web path 13.
  • the material web tension may collapse. Then, the paper web 06 can adhere to the output of the printing gap on one of the cylinder 01 or 02, and a part of the paper web 06, which has already passed through the printing gap, can be withdrawn into the printing unit. In principle, the paper web 06 can leave the regular material web path 13 to the right or it leaves the regular material web path 13 in the left direction and then runs on an irregular material web path.
  • a distance sensor 09 is provided.
  • a triangulation sensor is used as the rangefinder 09.
  • the impression cylinder 01 is also a transfer cylinder as in the transfer cylinder 02.
  • Analogous to the arrangement of the forme cylinder 03 with respect to the transfer cylinder 02 is in such an embodiment, the impression cylinder 01 associated with a form cylinder.
  • the sensor 09 comprises a transmitter for emitting a scanning signal and a receiver for registering a reflection of the scanning signal after propagation on a beam path 16 and is arranged so that the beam path 16 extends laterally from the regular material path 13 and the scanning signal on the surface of the cylinder 02 at a location is reflected at the regular web path 13 no paper web 06 is located.
  • the scanning signal may be, for example, an ultrasonic signal.
  • a light signal is used as a scanning signal.
  • Changes in the scanning signal resulting from the rotation of the cylinder 02 are used specifically to detect a fault. Namely, the changes in the scanning signal associated with the rotation of the cylinder 02 have the same period as the rotation of the cylinder 02 itself. It is therefore sufficient for the disturbance detection to monitor the received scanning signal for the presence of a spectral component with this period.
  • the surface of the cylinder 02 scanned by the signal is structured by relief.
  • a relief structure is preferably formed by recesses, such as arranged in the plate spacing, axially oriented grooves missing this spectral component in the scanning signal, the paper web 06 between sensor 09 and cylinder 02 has penetrated and a material web run disturbance exists.
  • a distance sensor 09 is an optical sensor 09, z. B. a triangulation sensor is preferred; However, the following explained functional principle works well with other sensor types such. B. a push button.
  • the surface of the cylinder 02 has a relief structure as described above.
  • the sensor 09 measures a periodically modulated by the relief structure distance to the cylinder 02. Occurs now due to a running disturbance paper in the side of the regular web path 13 located beam path 16 between the sensor 09 and the cylinder 02, so changes the characteristic of the regular web path 13 modulation of the distance, and the sensor 09 detects the running disturbance.
  • Deviating from Fig. 1 could the sensor 09 also on the input side of the gap between the cylinders 01; 02 be arranged.
  • the in the Fig. 1 the output side arrangement shown is preferred because it allows earlier winder detection.
  • the paper web 06 the Transfer cylinder 02 advantageously wrap around to ensure after a running disturbance the irregular web path 11, the paper web 06 occupies on a particular page after the nip.
  • a device with such a loop of the cylinder 02 is in Fig. 2 shown on the example of a perfecting, in which a paper web 06 is printed on both sides.
  • the perfecting is through the cylinder 01; 02; 03, 14 formed.
  • the cylinders 01, 02 form a pressure nip through which the paper web 06 is guided.
  • the paper web 06 wraps around the cylinder 02 at the outlet of the pressure gap.
  • the cylinder 03 is arranged adjacent to the cylinder 02, while the cylinder 14 bears against the cylinder 01.
  • the cylinders 03 and 14 are provided as forme cylinders 03 and 14, in which printing stencils for the transfer of ink to the transfer cylinders 02 and 01 are mounted. From the transfer cylinders 01 and 02, the ink is applied to a corresponding side of the paper web 06.
  • the transfer cylinders 01 and 02 act as impression cylinders for the respective other transfer cylinders 01 and 02.
  • the paper web 06 After passing through the pressure gap between the cylinders 01 and 02, the paper web 06 normally runs on a regular material web path 13. In the event of a running disturbance of the paper web 06, in particular in the case of a material web break, the paper web 06 leaves the regular material web path 13. The wrapping of the cylinder 02 through the paper web 06, the direction in which the paper web 06 deviates from the regular web path 13. Since the sensor 09 lies on the same side of the regular material path 13 as the looped cylinder 02, the paper web 06 deviates towards its side, so that the sensor 09 can detect the running disturbance.
  • a wrap of a cylinder 01; 02 by the paper web 06 of advantage, because it allows a course of the paper web 06 can be adjusted in a running disturbance on a preselected page after the printing nip.
  • a sensor 09 detects a running disturbance
  • the cylinders 01 and 02 can now be moved apart rapidly by a device for adjustment, in particular by changing the axial distance, and / or the paper web 06 can move in front of a point The interruption of the race or broken away to avoid damage to the printing press and the resulting forces are reduced.

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Paper (AREA)
  • Advancing Webs (AREA)
  • Pulleys (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)

Claims (9)

  1. Dispositif pour identifier une perturbation de défilement dans une bande de matériau (06) en déplacement, avec un capteur (09), un cylindre (01 ; 02) guidant la bande de matériau (06), présentant une structure susceptible d'être détectée par le capteur (09), le capteur (09) étant disposé de manière que le capteur (09) détecte une structure du cylindre (01 ; 02) dans le cas où un défilement de bande de matériau n'est pas perturbé et, en cas de non détection de la structure, il identifie qu'il se produit une perturbation du défilement, caractérisé en ce que le capteur (09) est un capteur d'éloignement (09), mesurant sur le cylindre un espacement modulé périodiquement par la structure, en ce que le capteur d'éloignement (09) identifie une perturbation dans le défilement, du fait d'une modification d'une modulation de l'espacement qui est caractéristique du défilement non perturbé de la bande de matériau.
  2. Dispositif selon la revendication 1, caractérisé en ce que le capteur (09) dispose d'un émetteur pour envoyer un signal de balayage exploratoire et d'un récepteur pour enregistrer le signal de balayage exploratoire, après propagation sur une entrée de rayonnement (16).
  3. Dispositif selon la revendication 1, caractérisé en ce que la structure présente des creusements sur la surface du cylindre (01 ; 02).
  4. Dispositif selon la revendication 1, caractérisé en ce que le dispositif est disposé dans une machine à imprimer.
  5. Dispositif selon la revendication 4, caractérisé en ce que la bande de matériau (06) s'étend à travers un intervalle d'impression entre deux cylindres (01 ; 02) et, à une sortie de l'intervalle d'impression, enlace l'un des cylindres (01 ; 02).
  6. Dispositif selon la revendication 4, caractérisé en ce qu'un dispositif d'interruption de la bande de matériau (06), lors de l'enregistrement d'une perturbation de défilement, est prévu.
  7. Dispositif selon la revendication 1, caractérisé en ce que, en cas de constatation d'une perturbation du défilement, un dispositif de réglage d'un entraxe des cylindres (01 ; 02) est actionné, de manière que les efforts augmentés, produits par l'irrégularité du défilement de la bande de matériau, soient réduits.
  8. Dispositif selon la revendication 1, caractérisé en ce que le capteur (09) est un capteur optique (09).
  9. Dispositif selon la revendication 1, caractérisé en ce que le capteur (09) est un capteur de triangulation.
EP03760553A 2002-06-19 2003-06-04 Dispositif de detection d'une perturbation dans le defilement d'une bande Expired - Lifetime EP1513756B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10227694A DE10227694A1 (de) 2002-06-19 2002-06-19 Vorrichtung und Verfahren zur Erkennung einer Laufstörung bei einer laufenden Materialbahn
DE10227694 2002-06-19
PCT/DE2003/001841 WO2004000704A1 (fr) 2002-06-19 2003-06-04 Dispositif de detection d'une perturbation dans le defilement d'une bande

Publications (2)

Publication Number Publication Date
EP1513756A1 EP1513756A1 (fr) 2005-03-16
EP1513756B1 true EP1513756B1 (fr) 2008-03-26

Family

ID=29795839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03760553A Expired - Lifetime EP1513756B1 (fr) 2002-06-19 2003-06-04 Dispositif de detection d'une perturbation dans le defilement d'une bande

Country Status (5)

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EP (1) EP1513756B1 (fr)
AT (1) ATE390376T1 (fr)
AU (1) AU2003243916A1 (fr)
DE (2) DE10227694A1 (fr)
WO (1) WO2004000704A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004052504A2 (fr) 2002-12-11 2004-06-24 Donaldson Company, Inc. Milieux de filtres z dotes de systemes de nettoyage a contre-courant
DE102006019761A1 (de) * 2006-04-28 2007-10-31 Koenig & Bauer Aktiengesellschaft Bogenkontrolleinrichtung und Verfahren zur Bogendetektion
DE102008000522B4 (de) 2008-03-05 2011-05-05 Koenig & Bauer Aktiengesellschaft Vorrichtung zur Erkennung einer in ihrem Lauf gestörten Materialbahn
EP2098369B1 (fr) 2008-03-05 2012-03-21 Koenig & Bauer AG Procédé de fonctionnement d'une imprimante comprenant plusieurs unités d'impression
DE102008000526A1 (de) 2008-03-05 2009-09-17 Koenig & Bauer Aktiengesellschaft Verfahren zum Betreiben einer mehrere Druckeinheiten aufweisenden Druckmaschine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58211455A (ja) * 1982-06-01 1983-12-08 ハイデルベルガ−　ドウリユツクマシ−ネン　アクチエンゲゼルシヤフト 輪転印刷機の安全装置
DE3822497A1 (de) * 1987-12-02 1989-10-19 Kotterer Grafotec Vorrichtung zum verhindern von maschinenschaeden
US4966074A (en) * 1989-02-13 1990-10-30 Aldrich Jr Wesley C Web wrap detection system for an offset web printing press
US5073714A (en) * 1990-05-22 1991-12-17 Union Camp Corporation Method and apparatus for detecting amplitude and frequency of web flutter using infrared optical sensor
DE4302189A1 (de) * 1993-01-27 1994-07-28 Roland Man Druckmasch Elektrisches Zugwerk
DE9320409U1 (de) * 1993-04-26 1994-06-23 Albert-Frankenthal Ag, 67227 Frankenthal Einrichtung zum Verhindern von Druckwerksschäden bei Bahnriß
DE4435337B4 (de) * 1994-10-01 2005-12-15 Koenig & Bauer Ag Verfahren und Einrichtung zur Bogenkontrolle
DE19506456C2 (de) * 1995-02-24 1999-07-01 Boewe Systec Ag Kontrolleinrichtung zur Überwachung des Laufes zweier übereinanderliegender Papierbahnen in einer Papierverarbeitungsmaschine
DE19645799A1 (de) * 1996-11-07 1998-05-20 Roland Man Druckmasch Papierbahnfangvorrichtung
DE29802400U1 (de) * 1998-02-12 1999-06-10 Eduard Küsters Maschinenfabrik GmbH & Co. KG, 47805 Krefeld Walzenpaar

Also Published As

Publication number Publication date
DE10227694A1 (de) 2004-01-29
AU2003243916A1 (en) 2004-01-06
WO2004000704A1 (fr) 2003-12-31
EP1513756A1 (fr) 2005-03-16
ATE390376T1 (de) 2008-04-15
DE50309475D1 (de) 2008-05-08

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