EP1513756B1 - Device for detecting a running disturbance in a running web - Google Patents

Device for detecting a running disturbance in a running web 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
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EP
European Patent Office
Prior art keywords
web
sensor
cylinder
running
distance
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EP03760553A
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German (de)
French (fr)
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EP1513756A1 (en
Inventor
Helmut Holm
Oliver Frank Hahn
Georg Schneider
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Koenig and Bauer AG
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Koenig and Bauer AG
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    • 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)
  • Paper (AREA)
  • Advancing Webs (AREA)
  • Pulleys (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Controlling Sheets Or Webs (AREA)

Abstract

The invention relates to a device for detecting a running disturbance in a running web (06), preferably of a paper web, comprising a normal web path (13), which is followed by the web when in an undisturbed state, and comprising a sensor (09). The sensor is a distance sensor, which quantitatively detects a distance of the web from the normal web path followed thereby when in an undisturbed state, and detects a running disturbance when the distance of the web from the web path exceeds a predetermined value. In another device, the sensor uses an emitter for emitting a sampled signal and a receiver for registering the scanned signal after propagating on a beam path. The beam path runs along the side of the normal web path and the sensor detects a running disturbance when the web enters the beam path.

Description

Die Erfindung betrifft eine Vorrichtung zur Erkennung einer Laufstörung bei einer laufenden Materialbahn gemäß dem Oberbegriff des Anspruches 1.The invention relates to a device for detecting a running disturbance in a running material web according to the preamble of claim 1.

Bei bahnverarbeitenden Maschinen wie etwa Rollendruckmaschinen kann es in Folge einer Laufstörung wie z. B. einem Papierbahnbruch zu einem Wickler, d. h. zu einem Aufwickeln einer Papierbahn um einen Rotationszylinder kommen. Hierdurch wächst der Durchmesser des Rotationszylinders an. Wenn der betroffene Rotationszylinder mit einem anderen Zylinder einen Spalt, z. B. einen Druckspalt in einem Druckwerk, begrenzt, durch welchen die Papierbahn auf einem regulären Papierbahnweg hindurchgeführt wird, so führt ein Aufwickeln der Papierbahn um einen der Rotationszylinder nach einem Papierbahnbruch zu einer Erhöhung einer Pressung in dem Spalt. Wird diesem Pressungsanstieg nicht entgegengewirkt, so führt er mindestens zur Beschädigung des Bezuges der Rotationszylinder; in der Regel aber auch zur Beschädigung der Rotationszylinder selber bzw. deren Lager. Zur Vermeidung solcher Schäden bei einem Papierbahnbruch kann der Druckspalt geöffnet werden, wodurch ein Anstieg der Pressung unterbrochen wird. Es kann aber auch die Papierbahn vor dem betroffenen Spalt durchtrennt werden, um einen weiteren Zufluss von Papier zu unterbrechen. Auch ist ein Öffnen des Druckspalts und eine Unterbrechung des Zuflusses von Papier möglich. Wichtig ist jedoch in allen Fällen die schnelle Erkennung eines Papierbahnbruches, um diese Maßnahmen noch vor Entstehen eines Schadens durchführen zu können.In web-processing machines such as web presses, it may be due to a running disorder such. B. a paper web break to a winder, d. H. come to a winding of a paper web around a rotary cylinder. As a result, the diameter of the rotary cylinder increases. If the affected rotary cylinder with another cylinder a gap, z. As a printing nip in a printing unit, limited, through which the paper web is passed on a regular Papierbahnweg, so leads a winding of the paper web to one of the rotary cylinder after a paper web break to an increase in a pressure in the gap. If this increase in pressure is not counteracted, it will at least damage the cover of the rotary cylinder; but usually also to damage the rotary cylinder itself or their bearings. To avoid such damage in a paper web break, 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.

Es ist bekannt, den Papierbahnbruch mit Sensoren zu detektieren. Zu diesem Zweck werden Lichtschranken eingesetzt, um die.Anwesenheit einer Papierbahn zu detektieren. Lichtschranken haben das Problem, dass sie Laufstörungen recht spät erkennen, da die Bruchstelle erst an der Lichtschranke vorbeilaufen muss, um als solche registriert zu werden.It is known to detect the paper web break with sensors. For this purpose, 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.

Es ist auch bekannt, einen Zusammenbruch einer Papierbahnspannung zu detektieren, um einen Hinweis auf eine Laufstörung der Papierbahn zu erhalten. Hier liegt das Problem darin, dass bei partiellen Papierbahnbrüchen ein zu geringer Bahnspannungsabfall auftritt, um den partiellen Bahnbruch als solchen zu erkennen.It is also known to detect a collapse of a paper web tension in order to obtain an indication of a runout of the paper web. Here, the problem lies in the fact that in partial web breaks too low web tension drop occurs to recognize the partial web break as such.

Als besonders kritisch erweisen sich sogenannte Rückwickler, bei denen eine normalerweise auslaufende Bahn in das Druckwerk zurückgezogen wird, während gleichzeitig weiterhin Papier zuläuft. Zum einen wird bei einem solchen Fall die Papierbahn doppellagig aufgewickelt. Da zum anderen die auslaufende Bahn zurückgezogen wird, registriert eine hinter dem Druckwerk angeordnete Lichtschranke nach wie vor eine Existenz der Papierbahn. Es ergeben sich dadurch besonders lange Reaktionszeiten vom Eintritt der Laufstörung bis zu deren Erkennen. Außerdem werden besonders große Papiermengen auf dem Rotationszylinder aufgewickeltParticularly critical are so-called rewinders, in which a normally expiring web is retracted into the printing unit, while at the same time continue to tap paper. First, in such a case, 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. In addition, particularly large amounts of paper are wound on the rotary cylinder

Es ist bekannt, Rückwickelsperren einzusetzen, um solche Rückwickler zu verhindern. Rückwickelsperren können jedoch bei frisch bedrucktem feuchten Papier nicht eingesetzt werden, da sie einen Pressungsdruck auf die Papierbahn ausüben, der aber bei feuchtem Papier zu vermeiden ist. Eine schnelle Erkennung einer Laufstörung kann hier nur in eingeschränktem Umfang dadurch erreicht werden, dass viele nah beieinander liegende Sensoren eingesetzt werden. Dieser Maßnahme steht der hohe Kostenfaktor gegenüber, den ein Einsatz einer großen Anzahl von Sensoren mit sich bringt.It is known to use rewind locks to prevent such rewinders. However, 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.

Die DE 93 20 409 U1 beschreibt einen Sensor, der einen Abstand zu einer laufenden Materialbahn erfasst, um einen Bahnbruch zu erkennen.The DE 93 20 409 U1 describes a sensor that detects a distance to a moving material web to detect a web break.

Die DE 195 06 456 A1 offenbart eine Vorrichtung zum Erfassen eines Bahnbruches, bei der mittels Sensoren beim Bahnbruch eine Oberfläche einer Platte erfasst wird.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.

Durch die DE 44 35 337 A1 ist eine Einrichtung zur Bogenkontrolle bekannt, bei der bei Nichtvorhandensein eines Bogens eine korrespondierende Trommel ein Signal ablenkt, so dass keine Reflexion auftritt.By the DE 44 35 337 A1 For example, there is known a bow-control device in which, in the absence of a bow, a corresponding drum deflects a signal so that no reflection occurs.

Die US 49 66 074 A und die US 45 58 216 A beschreiben Vorrichtungen zur Erkennung einer Laufstörung einer Materialbahn einer laufenden Druckmaschine. Dabei tastet ein Sensor jeweils einen Gummizylinder eines Druckwerkes ab, wobei die sich ändernden Reflexionseigenschaften des Zylinders bei einem Wickler erfasst werden.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. In this case, a sensor each scans a blanket cylinder of a printing unit, wherein the changing reflection properties of the cylinder are detected in a winder.

Die DE 43 02 189 A1 offenbart ein Zugwerk für eine Druckmaschine. Um einen Papierriss zu erfassen, tasten optische Sensoren eine Zugwalze ab.The DE 43 02 189 A1 discloses a train for a printing press. To detect a paper tear, optical sensors scan a tension roller.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur Erkennung einer Laufstörung bei einer laufenden Materialbahn zu schaffen.The invention has for its object to provide a device for detecting a running disturbance in a running web.

Die Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 gelöst.The object is achieved by the features of claim 1.

Im Unterschied zu bekannten Störungserfassungsvorrichtungen kann gemäß der Erfindung ein nach einer Laufstörung auftretender Wickler direkt am Ort seines Auftretens detektiert werden, wohingegen bekannte Vorrichtungen Laufstörungen nur indirekt als solche erkennen können. Laufstörungen werden somit mittels der Erfindung ohne Zeitverzug erkannt. Weil dank des raschen Erkennens einer Laufstörung umgehend auf diese reagiert werden kann, lässt sich der infolge einer Laufstörung auftretende Maschinenschaden erheblich reduzieren oder gar völlig vermeiden. Reparaturkosten, sowie der für eine Reparatur bzw. die Wiederherstellung der Betriebsbereitschaft der bahnverarbeitenden Maschine notwendige Zeitaufwand werden gesenkt. Eine weitere Kostensenkung wird durch das Einsparen von Sensoren an mehreren Stellen der Materialbahn erzielt.In contrast to known interference detection devices according to the invention, 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.

Die Vorrichtung weist gegenüber bekannten Vorrichtungen wie z. B. die in der DE 38 22 497 A1 beschriebenen Vorrichtung den Unterschied auf, dass ihr Sensor die Lage der Materialbahn quantitativ erfasst, und zwar sowohl bei störungsfreiem Verlauf der Materialbahn als auch im Falle einer Laufstörung, während die bei DE 38 22-497 A1 als Sensoren eingesetzten kapazitiven Schalter jeweils nur bei übermäßiger Annäherung der Materialbahn an sie anzusprechen vermögen, also lediglich eine qualitative Aussage darüber machen, ob die Materialbahn auf einem regulären Materialbahnweg oder davon abweichenden Materialbahnweg verläuft. Die Vorrichtung hat gegenüber der in der zitierten Schrift beschriebenen Vorteil, dass sie nur einen Sensor benötigt. Zudem vereinfacht sich der apparative Aufbau, da die Materialbahn nicht zwischen zwei Sensoren eingefädelt werden muss.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.

Für die Ausgestaltung der Vorrichtung handelt es sich allgemein um einen beliebigen Entfernungssensor, beispielsweise um einen Ultraschallsensor. Es wird jedoch vorzugsweise ein Triangulationssensor eingesetzt.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.

Bei einer Weiterbildung der Vorrichtung ist ein im Strahlengang angeordneter Reflektor vorgesehen. Bevorzugt wird dabei eine Vorrichtung, bei der der Reflektor ein die Materialbahn führender Zylinder ist.In a development of the device, 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.

Die Oberfläche des Zylinders weist eine das Abtastsignal modulierende Struktur auf. Da der Zylinder bedingt durch die Führung der Materialbahn rotiert, wird die Struktur vom Abtastsignal periodisch überstrichen und hat somit eine modulierende Wirkung auf das reflektierte Abtastsignal.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.

Entsprechend kann bei den beschriebenen alternativen Ausgestaltungen der Vorrichtung ein beliebig geartetes Abtastsignal benutzt werden. Bevorzugt wird jedoch ein Lichtsignal als Abtastsignal verwendet.Accordingly, any desired scanning signal can be used in the described alternative embodiments of the device. Preferably, however, a light signal is used as a scanning signal.

Bei einer Weiterbildung der Vorrichtung verfügt der Sensor über einen Sender zum Aussenden eines Abtastsignals und einen Empfänger zum Registrieren des Abtastsignals nach Ausbreitung auf einem Strahlengang. Bei dem Abtastsignal kann es sich um ein beliebiges Signal wie z. B. ein Ultraschallsignal handeln, es wird jedoch vorzugsweise ein Lichtsignal für das Abtastsignal verwendet.In a development of the device, the sensor 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. B. an ultrasonic signal act, however, it is preferably used a light signal for the scanning signal.

In dem Strahlengang des Abtastsignals kann ein Reflektor vorgesehen sein. Bevorzugt wird dabei eine Ausführungsform, bei der es sich bei dem Reflektor um einen die Materialbahn führenden Zylinder handelt.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.

Bei einem Entfernungssensor, wie z. B. einem Triangulationssensor oder einem Tastsensor ist eine Ausführung der Struktur von Vorteil, wobei die Struktur Vertiefungen auf der Oberfläche des Zylinders aufweist. Dabei kann es sich beispielsweise um eine oder mehrere muldenförmige Vertiefungen oder längliche, kanalförmige Vertiefungen handeln.In a distance sensor, such. As 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.

Rotiert der Zylinder, so misst der Entfernungsmesser aufgrund der sich auf der Oberfläche des Zylinders befindlichen Vertiefungen einen wechselnden Abstand zwischen sich und dem Zylinder. Auch in diesem Fall führt eine infolge einer Laufstörung in den Bereich zwischen Zylinder und Sensor eindringende oder den Zylinder umwickelnde Materialbahn zu einer Änderung des vom Sensor detektierten Abtastsignals, da der vom Sensor gemessene Abstand zwischen dem Sensor und dem Zylinder sich nicht mehr periodisch ändert. Der Sensor erkennt daran die Laufstörung.If the cylinder rotates, 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.

Bevorzugt werden die Vorrichtungen in Druckmaschinen eingesetzt.Preferably, the devices are used in printing machines.

In Druckmaschinen verläuft die Materialbahn durch einen Druckspalt zwischen zwei Zylindern. Indem sie dabei am Ausgang des Druckspalts einen der Zylinder umschlingt, wird bei einer Laufstörung ein Verlauf der Materialbahn auf einer der umschlungenen Zylinder zugewandten Seite des regulären Materialbahnwegs sichergestellt.In printing presses, the material web passes through a pressure gap between two cylinders. By 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.

Zur Vermeidung von Schäden im Falle einer Laufstörung, ist eine zusätzliche Vorrichtung zur Unterbrechung der Materialbahn bei Registrierung einer Laufstörung vorhanden. Eine solche Vorrichtung unterbindet das Nachfließen von Material, und die Entstehung eines Schadens aufgrund der Laufstörung wird verhindert oder zumindest der durch die Störung möglicherweise entstehende Schaden begrenzt.To avoid damage in the event of a running fault, there is an additional device for interrupting the web when registering a running fault. 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.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden näher beschrieben.Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Es zeigen:

Fig. 1
eine Darstellung der Erfindung, mit einem Sensor, der ein Abtastsignal aussendet, das an der Oberfläche eines Zylinders an einer Stelle reflektiert wird und an der sich bei regulärem Materialbahnweg keine Materialbahn befindet;
Fig. 2
eine Ausführung der Erfindung in einem Widerdruckwerk mit umschlungenem Zylinder.
Show it:
Fig. 1
an illustration of the invention, with a sensor that emits a scanning signal that is reflected at the surface of a cylinder at a location and at the regular web path is no material web;
Fig. 2
an embodiment of the invention in a perfecting with embraced cylinder.

Eine Ausführungsform der Erfindung ist in Fig. 1 oder 2 am Beispiel einer Rotationsdruckmaschine dargestellt. Dabei zeigt Fig. 1 in schematischer Form einen Querschnitt durch ein Druckwerk der Rotationsdnrckmaschine.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.

Das Druckwerk besteht aus einem Zylinder 01, z. B. Gegendruckzylinder 01, einem Zylinder 02, z. B. Übertragungszylinder 02 und einem Zylinder 03, z.B. Formzylinder 03. Jeder der Zylinder 01; 02; 03 rotiert in einem Umlaufssinn, der durch einen Pfeil eingezeichnet ist. Der Gegendruckzylinder 01 und der Übertragungszylinder 02 sind so angeordnet, dass sich zwischen ihnen ein Druckspalt befindet. Der Formzylinder 03 liegt am Übertragungszylinder 02 an. Durch den zwischen Gegendruckzylinder 01 und Übertragungszylinder 02 befindlichen Druckspalt führt eine Materialbahn 06, z. B. Papierbahn 06 zu einem Leitelement. Das Leitelement kann beispielsweise als Leitwalze oder Igelwalze ausgeführt sein oder durch den Druckspalt eines nachfolgenden Druckwerks gebildet werden. In der Fig. 1 kennzeichnet ein Pfeil die Laufrichtung der Papierbahn 06.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. By located between the impression cylinder 01 and transfer cylinder 02 pressure gap leads a web 06, z. B. paper web 06 to a guide element. 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. In the Fig. 1 an arrow indicates the running direction of the paper web 06.

Auf dem Formzylinder 03 sind Druckschablonen angeordnet, mit denen Druckfarbe auf den Übertragungszylinder 02 aufgebracht wird, der diese Druckfarbe schließlich auf die Papierbahn 06 überträgt. Der Gegendruckzylinder 01 sorgt dabei für den dafür benötigten Gegendruck. Idealisiert betrachtet läuft die Papierbahn 06 zwischen dem Druckspalt und dem Leitelement auf einer geraden Linie. In der Praxis kann der momentane Verlauf der Papierbahn 06 aufgrund von Unregelmäßigkeiten im Lauf oder von Fluktuationen der Materialbahnspannung geringfügig von der Geradlinigkeit abweichen. Als regulärer Materialbahnweg 13 der Papierbahn 06, der einem ungestörten Funktionieren der Druckmaschine entspricht, muss daher ein Volumen mit quer zu der geraden Linie endlicher Ausdehnung angenommen werden. In der Fig. 1 sind die Grenzen des regulären Materialbahnwegs 13 durch gestrichelte Linien markiert. Beiderseits des regulären Materialbahnwegs 13 befindet sich eine Zone, in die die Papierbahn 06 beiungestörtem Funktionieren der Druckmaschine nicht eintreten darf.On the forme cylinder 03 printing stencils are arranged, with which printing ink is applied to the transfer cylinder 02, which finally transfers this ink to the paper web 06. The impression cylinder 01 ensures the required back pressure. Ideally viewed, the paper web 06 runs between the nip and the guide on a straight line. In practice, 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. As 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. In the Fig. 1 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.

Am Ausgang der Druckspalts verläuft die Papierbahn 06 auf einem regulären Materialbahnweg 13.At the exit of the printing nip, the paper web 06 runs on a regular web path 13.

Kommt es zu einer Laufstörung der Papierbahn 06, wie z.B. einem Materialbahnbruch, so schlägt sich die Papierbahn 06 aufgrund der Haftkraft der Druckfarbe auf die Seite des Übertragungszylinders 02 und nimmt den irregulären Materialbahnweg 11 ein oder sie wickelt sich um den Übertragungszylinder 02.If there is a running disturbance of the paper web 06, such as a material web break, so the paper web strikes 06 due to the adhesive force of the ink on the side of the transfer cylinder 02 and takes the irregular material web path 11 or it wraps around the transfer cylinder 02.

Erfolgt eine Laufstörung der Papierbahn 06 an einer dem Leitelement nachfolgenden Stelle, so kann es zu einem Zusammenbruch der Materialbahnspannung kommen. Dann kann die Papierbahn 06 am Ausgang des Druckspaltes an einem der Zylinder 01 oder 02 haften bleiben, und ein Teil der Papierbahn 06, der den Druckspalt bereits durchlaufen hat, kann in das Druckwerk zurückgezogen werden. Dabei verlässt die Papierbahn 06 den regulären Materialbahnweg 13. Grundsätzlich kann die Papierbahn 06 den regulären Materialbahnweg 13 nach rechts verlassen oder aber sie verlässt den regulären Materialbahnweg 13 in linker Richtung und verläuft dann auf einem irregulären Materialbahnweg.If a running disturbance of the paper web 06 occurs at a point following the guide element, 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.

Zur Erkennung einer Laufbahnstörung ist der Sensor 09, ein Entfernungssensor 09 vorgesehen.To detect a career disturbance, the sensor 09, a distance sensor 09 is provided.

Bevorzugterweise wird als Entfernungsmesser 09 ein Triangulationssensor eingesetzt.Preferably, a triangulation sensor is used as the rangefinder 09.

In einer in der Fig. 1 nicht gezeigten alternativen Ausführungsform des Druckwerks, bei der die Papierbahn 06 doppelseitig bedruckt wird, handelt es sich bei dem Gegendruckzylinder 01 ebenfalls um einen Übertragungszylinder wie beim Übertragungszylinder 02. Analog zur Anordnung des Formzylinders 03 bezüglich des Übertragungszylinders 02 ist in einer solchen Ausführungsform auch dem Gegendruckzylinder 01 ein Formzylinder zugeordnet.In one in the Fig. 1 not shown alternative embodiment of the printing unit, in which the paper web 06 is printed on both sides, it is in 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.

Der Sensor 09 umfasst einen Sender zum Aussenden eines Abtastsignals und einen Empfänger zum Registrieren eines Reflexes des Abtastsignals nach Ausbreitung auf einem Strahlengang 16 und ist so angeordnet, dass der Strahlengang 16 seitlich vom regulären Materialbahnweg 13 verläuft und das Abtastsignal an der Oberfläche des Zylinders 02 an einer Stelle reflektiert wird, an der sich bei regulären Materialbahnweg 13 keine Papierbahn 06 befindet. Das Abtastsignal kann beispielsweise ein Ultraschallsignal sein. Bevorzugt wird allerdings ein Lichtsignal als Abtastsignal verwendet.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. Preferably, however, a light signal is used as a scanning signal.

Aus der Drehung des Zylinders 02 resultierende Änderungen des Abtastsignals werden gezielt zum Erfassen einer Störung genutzt. Die mit der Drehung des Zylinders 02 zusammenhängenden Änderungen des Abtastsignals haben nämlich die gleiche Periode wie die Drehung des Zylinders 02 selbst Es genügt daher für die Störungserfassung, das empfangene Abtastsignal auf das Vorhandensein einer Spektralkomponente mit dieser Periode zu überwachen. Um eine starke solche Komponente im Abtastsignal zu erzeugen, ist die von dem Signal abgetastete Oberfläche des Zylinders 02 durch Relief strukturiert. Eine Reliefstruktur ist vorzugsweise durch Vertiefungen, wie etwa im Plattenabstand angeordnete, axial orientierte Rillen gebildet Fehlt diese Spektralkomponente im Abtastsignal, so ist die Papierbahn 06 zwischen Sensor 09 und Zylinder 02 eingedrungen und eine Materialbahnlaufstörung liegt vor.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. In order to produce a strong such component in the scanning signal, 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.

Als Entfernungssensor 09 ist ein optischer Sensor 09, z. B. ein Triangulationssensor bevorzugt; das im folgenden erläuterte Funktionsprinzip funktioniert aber auch mit anderen Sensortypen wie z. B. einem Tastsensor. Die Oberfläche des Zylinders 02 hat eine Reliefstruktur, wie oben beschrieben. Infolge der Drehung des Zylinders 02 misst der Sensor 09 einen durch die Reliefstruktur periodisch modulierten Abstand zum Zylinder 02. Tritt nun infolge einer Laufstörung Papier in den seitlich des regulären Materialbahnweges 13 befindlichen Strahlengang 16 zwischen dem Sensor 09 und dem Zylinder 02 ein, so ändert sich die für den regulären Materialbahnweg 13 charakteristische Modulation des Abstands, und der Sensor 09 erkennt die Laufstörung.As 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. As a result of the rotation of the cylinder 02, 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.

Abweichend von Fig. 1 könnte der Sensor 09 auch auf der Eingangsseite des Spalts zwischen den Zylindern 01; 02 angeordnet sein. Die in der Fig. 1 gezeigte ausgangsseitige Anordnung ist jedoch bevorzugt, da sie eine frühere Wicklererfassung erlaubt.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 However, the output side arrangement shown is preferred because it allows earlier winder detection.

Auch bei der in Fig. 1 gezeigten Anordnung kann die Papierbahn 06 den Übertragungszylinder 02 vorteilhafterweise umschlingen, um nach einer Laufstörung den irregulären Materialbahnweg 11, den die Papierbahn 06 einnimmt, auf einer bestimmten Seite nach dem Druckspalt sicherzustellen.Also at the in Fig. 1 shown arrangement, 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.

Eine Vorrichtung mit einer solchen Umschlingung des Zylinders 02 ist in Fig. 2 am Beispiel eines Widerdruckwerks gezeigt, bei dem eine Papierbahn 06 doppelseitig bedruckt wird. Das Widerdruckwerk wird durch die Zylinder 01; 02; 03;14 gebildet. Die Zylinder 01, 02 bilden einen Druckspalt, durch den die Papierbahn 06-geführt wird. Die Papierbahn 06 umschlingt am Ausgang des Druckspalts den Zylinder 02. An den Zylinder 02 anliegend ist der Zylinder 03 angeordnet, während der Zylinder 14 am Zylinder 01 anliegt.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.

Die Zylinder 03 und 14 sind als Formzylinder 03 und 14 vorgesehen, bei denen Druckschablonen zur Übertragung von Druckfarbe auf die Übertragungszylinder 02 und 01 angebracht sind. Von den Übertragungszylindern 01 und 02 wird die Druckfarbe auf eine entsprechende Seite der Papierbahn 06 aufgetragen. Es wirken die Übertragungszylinder 01 und 02 dabei als Gegendruckzylinder für den jeweils anderen Übertragungszylinder 01 und 02.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.

Nach Durchlaufen des Druckspaltes zwischen den Zylindern 01 und 02 verläuft die Papierbahn 06 normalerweise auf einem regulären Materialbahnweg 13. Im Falle einer Laufstörung der Papierbahn 06, insbesondere bei einem Materialbahnbruch, verlässt die Papierbahn 06 den regulären Materialbahnweg 13. Dabei legt die Umschlingung des Zylinders 02 durch die Papierbahn 06 die Richtung fest, in der die Papierbahn 06 vom regulären Materialbahnweg 13 abweicht. Da der Sensor 09 auf der gleichen Seite des regulären Materialbahnwegs 13 liegt wie der umschlungene Zylinder 02, weicht die Papierbahn 06 zu seiner Seite hin aus, so dass der Sensor 09 die Laufstörung erkennen kann.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.

Wäre die Umschlingung nicht vorhanden, so könnte die Papierbahn 06 bei einer Laufstörung sowohl den Zylinder 02 als auch den Zylinder 01 umwickeln. Zur Feststellung einer Laufstörung wären dann zwei Sensoren 09 notwendig (siehe Fig. 1), wobei einer der beiden auf den Zylinder 02 ausgerichtet sein müsste und der zweite auf den Zylinder 01.If the looping were not present, then the paper web 06 could wrap both the cylinder 02 and the cylinder 01 in the event of a running failure. To detect a running disturbance then two sensors 09 would be necessary (see Fig. 1 ), wherein one of the two would have to be aligned with the cylinder 02 and the second on the cylinder 01.

Ganz allgemein ist eine Umschlingung eines Zylinders 01; 02 durch die Papierbahn 06 von Vorteil, weil sich dadurch ein Verlauf der Papierbahn 06 bei einer Laufstörung auf eine vorselektierte Seite nach dem Druckspalt einstellen lässt.In general, 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.

Stellt in einer der oben dargelegten Ausführungsformen der Erfindung ein Sensor 09 eine Laufstörung fest, so können die Zylinder 01 und 02 nunmehr durch eine Vorrichtung zur Verstellung, insbesondere durch Veränderung des Achsabstands, rasch auseinander gefahren werden und/oder die Papierbahn 06 kann vor einer Stelle der Laufstörung unterbrochen, beziehungsweise quergetrennt werden, um Schäden an der Druckmaschine zu vermeiden und die entstehenden Kräfte reduziert werden.If, in one of the embodiments of the invention set forth above, 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.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

0101
Zylinder, GegendruckzylinderCylinder, impression cylinder
0202
Zylinder, ÜbertragungszylinderCylinder, transfer cylinder
0303
Zylinder, FormzylinderCylinder, forme cylinder
0404
--
0505
--
0.60.6
Materialbahn, PapierbahnMaterial web, paper web
0707
--
0808
--
0909
Sensor, Entfernungssensor, ReflexionslichtschrankeSensor, distance sensor, reflection light barrier
1010
--
1111
Materialbahnweg, irregulärerMaterial path, irregular
1212
ZoneZone
1313
Materialbahnweg, regulärerMaterial web way, regular
1414
Zylinder, FormzylinderCylinder, forme cylinder
1515
--
1616
Strahlengangbeam path

Claims (9)

  1. An apparatus for detecting a running defect in a running web of material (06), with a sensor (09), a cylinder (01; 02) which guides the web of material (06) and which has a structure capable of being detected by the sensor (09), wherein the sensor (09) is arranged in such a way that the sensor (09) detects a structure of the cylinder (01; 02) in the case of a defect-free running of the web of material, and in the event of not detecting the structure it recognizes a running defect, characterized in that the sensor (09) is a distance sensor (09) which measures a distance periodically modulated by the structure from the cylinder, and the distance sensor (09) recognizes a running defect on the basis of a change in a modulation of the distance characteristic of the defect-free running of the web of material.
  2. An apparatus according to Claim 1, characterized in that the sensor (09) has a transmitter for transmitting a sensing signal and a receiver for registering the sensing signal after spreading on an optical path (16).
  3. An apparatus according to Claim 1, characterized in that the structure has depressions on the surface of the cylinder (01; 02).
  4. An apparatus according to Claim 1, characterized in that the apparatus is arranged in a printing press.
  5. An apparatus according to Claim 4, characterized in that the web of material (06) runs through a printing gap between two cylinders (01; 02) and is wrapped around one of the cylinders (01; 02) at the outlet of the printing gap.
  6. An apparatus according to Claim 4, characterized in that an apparatus for interrupting the web of material (06) during the registering of a running defect is present.
  7. An apparatus according to Claim 1, characterized in that, when a running defect is established, an apparatus for adjusting an axial distance of the cylinders (01; 02) is actuated, so that the increased forces which occur as a result of the irregular running of the web of material are reduced.
  8. An apparatus according to Claim 1, characterized in that the sensor (09) is an optical sensor (09).
  9. An apparatus according to Claim 1, characterized in that the sensor (09) is a triangulation sensor.
EP03760553A 2002-06-19 2003-06-04 Device for detecting a running disturbance in a running web Expired - Lifetime EP1513756B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10227694A DE10227694A1 (en) 2002-06-19 2002-06-19 Device and method for detecting a running disturbance in a running material web
DE10227694 2002-06-19
PCT/DE2003/001841 WO2004000704A1 (en) 2002-06-19 2003-06-04 Device for detecting a running disturbance in a running web

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EP1513756B1 true EP1513756B1 (en) 2008-03-26

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AT (1) ATE390376T1 (en)
AU (1) AU2003243916A1 (en)
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US7282075B2 (en) 2002-12-11 2007-10-16 Donaldson Company, Inc. Z-filter media with reverse-flow cleaning systems and methods
DE102006019761A1 (en) * 2006-04-28 2007-10-31 Koenig & Bauer Aktiengesellschaft Sheet controlling device for use in sheet rotation printing machine, has reference surface arranged at radial distance of sheet web at sheet web transporting rotation body, where surface is curved corresponding to sheet web
DE102008000526A1 (en) 2008-03-05 2009-09-17 Koenig & Bauer Aktiengesellschaft Printing machine e.g. rotary printing press, operating method, involves slowing down one of rotation bodies arranged along path of web till to idle condition, rapidly than that of other body using brake device regulated by controller
EP2098369B1 (en) 2008-03-05 2012-03-21 Koenig & Bauer AG Method for operating a printing press with more than one printing unit
DE102008000522B4 (en) 2008-03-05 2011-05-05 Koenig & Bauer Aktiengesellschaft Device for detecting a material web disturbed in its course

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JPS58211455A (en) * 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 Preventive device for defective operation of rotary press
DE3822497A1 (en) * 1987-12-02 1989-10-19 Kotterer Grafotec DEVICE FOR PREVENTING MACHINE DAMAGE
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 (en) * 1993-01-27 1994-07-28 Roland Man Druckmasch Electric traction mechanism
DE9320409U1 (en) * 1993-04-26 1994-06-23 Albert-Frankenthal Ag, 67227 Frankenthal Device for preventing printing unit damage in the event of web break
DE4435337B4 (en) * 1994-10-01 2005-12-15 Koenig & Bauer Ag Method and device for sheet control
DE19506456C2 (en) * 1995-02-24 1999-07-01 Boewe Systec Ag Control device for monitoring the running of two superimposed paper webs in a paper processing machine
DE19645799A1 (en) * 1996-11-07 1998-05-20 Roland Man Druckmasch Paper web catcher
DE29802400U1 (en) * 1998-02-12 1999-06-10 Eduard Küsters Maschinenfabrik GmbH & Co. KG, 47805 Krefeld Pair of rollers

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AU2003243916A1 (en) 2004-01-06
DE10227694A1 (en) 2004-01-29
WO2004000704A1 (en) 2003-12-31
DE50309475D1 (en) 2008-05-08
ATE390376T1 (en) 2008-04-15

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