EP0502408B1 - Procédé et appareil pour surveiller une bande continue - Google Patents

Procédé et appareil pour surveiller une bande continue Download PDF

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Publication number
EP0502408B1
EP0502408B1 EP92103206A EP92103206A EP0502408B1 EP 0502408 B1 EP0502408 B1 EP 0502408B1 EP 92103206 A EP92103206 A EP 92103206A EP 92103206 A EP92103206 A EP 92103206A EP 0502408 B1 EP0502408 B1 EP 0502408B1
Authority
EP
European Patent Office
Prior art keywords
web
band width
distance
speed
control pulse
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
EP92103206A
Other languages
German (de)
English (en)
Other versions
EP0502408A1 (fr
Inventor
Josef Dipl.-Ing. Öttl
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.)
Grafotec Kotterer GmbH
Original Assignee
Grafotec Kotterer 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 Grafotec Kotterer GmbH filed Critical Grafotec Kotterer GmbH
Publication of EP0502408A1 publication Critical patent/EP0502408A1/fr
Application granted granted Critical
Publication of EP0502408B1 publication Critical patent/EP0502408B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/14—Automatic control of tripping devices by feelers, photoelectric devices, pneumatic devices, or other detectors
    • 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
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed

Definitions

  • the invention relates to a method for monitoring a web in a machine processing a web, in particular in a printing machine, according to the preamble of claim 1, and according to a further concept of the invention relates to a device for carrying out this method according to the preamble of claim 6.
  • the advantages which can be achieved with the measures according to the invention are primarily to be seen in the avoidance of the disadvantages described at the outset.
  • the measures according to the invention thus provide a simple possibility of avoiding false pulses by using a larger bandwidth within operating phases in which larger flutter movements of the web are to be expected. Nevertheless, a low inertia and, accordingly, a high level of safety can be guaranteed in operating phases in which the web is expected to run smoothly.
  • the bandwidth, when a control pulse is emitted, can advantageously be changed stepwise, expediently in the form of a step. This results in a particularly simple design.
  • Another expedient measure can be that the computer forming a signal processing device is programmed so that at least the distance between the web and the sensor when the speed signal arrives is measured and this distance can be set as the center of the preferably smaller bandwidth that can be set after the speed signal arrives.
  • the web-fed rotary printing machine indicated in FIG. 1 by a printing unit 1 is used for printing on a paper web 2.
  • a printing unit 1 As a rule, a plurality of printing units arranged one behind the other are provided, of which only the last one is shown in FIG. 1. Following the last printing unit, the paper web 2 passes through a dryer 3.
  • FIG. 1 shows a web catching device 5 arranged in the outlet area of the last printing unit 1.
  • the assigned web break switch 6 is located in the area of the dryer entrance.
  • the web break switch 6 contains a sensor 10 consisting of a transmitter 8 and a receiver 9, which is connected to a signal processing device 11 from which the signal line 7 extends.
  • the resulting reflection beam 13 is received by the receiver 9.
  • the beams 12, 13 can be light beams or preferably ultrasound beams.
  • the time difference ⁇ t indicated in FIG. 2 lies between the exit of the monitoring beam 12 indicated by a solid line from the transmitter 8 and the corresponding arrival of the reflection beam 13 indicated by the dashed line in FIG. From this time difference and the propagation speed, in the case of ultrasound beams of the speed of sound, the distance of the web 2 from the sensor 10 indicated in FIG. 1 at d 1 can be determined.
  • the safety device 5 remains passivated. As soon as the amount of ⁇ t or d is no longer in an approved range, i.e. no presence of the web 2 is found within the permitted range, this is interpreted as a web break. In this case, a control pulse is generated by the signal processing device 11 connected to the sensor 10, by means of which the web guiding device 5 is activated and the machine drive of the printing press is switched off and braked.
  • the required arithmetic operation is carried out by the signal processing device 11.
  • a programmable computer designed as a microprocessor is provided to form the signal processing device 11. This is programmed so that it switches from a certain speed of the web 2 from a larger area, indicated at B in FIG. 1, for the permissible position of the web 2 and accordingly for the distance d to a smaller area, indicated at b in FIG .
  • the resulting from the areas B and b for the permissible position of the web 2 Bandwidths for the distance d between web 2 and sensor 10 are indicated in Figure 3 at B 'and b'.
  • the time difference is measured, from which the distance is determined using the above formula. The same bandwidths therefore apply to the time difference.
  • Switching from the larger band width to the smaller band can, as can be seen in FIG. 3 from step S, take place in a web-fed rotary printing press of the present type when the web 2 has reached approximately 10% of its intended final speed.
  • the computer forming the signal processing device 11 is accordingly provided with an input 11a for a web speed signal. At this input there is a signal line 15 coming from a speed sensor 14. As soon as the machine and, accordingly, the web 2 reach the predetermined speed, the computer forming the signal processing device 11 receives a pulse via the signal line 15, which triggers the aforementioned switch from B to b .
  • the assembly of the sensor 10 is carried out so that the theoretical transport plane of the web 2 is approximately in the middle of the larger bandwidth B '. Due to assembly inaccuracies, however, there may be deviations, which, however, does not play any significant role in the area of the larger bandwidth B, as is indicated in FIG. 3 by the asymmetrical position of the larger bandwidth B ′ relative to the plane of the path indicated by a dash-dotted line. In the area of the smaller bandwidth b 'these inaccuracies are excluded.
  • the computer forming the signal processing device 11 is programmed so that it takes the distance d 1 measured between the path 2 and sensor 10 when the above-mentioned speed signal is received as the center of the smaller bandwidth b ', so that this, as can be seen from FIG. 3, increases symmetrically the path level indicated by a dash-dotted line. Accordingly, self-adjustment takes place independently of the sensor assembly. The same applies in the event that there are several possibilities in the machine for the path of web 2, as is often the case in folders, for example. Even in cases of this type, the sensor 10 adjusts itself to the path of the path 2 chosen in each case.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Claims (9)

  1. Procédé pour surveiller une feuille continue dans une machine de traitement d'une feuille continue, notamment dans une machine d'impression, dans lequel la feuille continue est sollicitée par un rayon de controle dont la reflexion est reçue ; et dans lequel la distance comprise entre l'émission du rayon de controle et la reception du rayon réfléchi est mesurée, et une impulsion de commande est engendrée dans le cas d'une distance excédant une largeur de bande passante préétablie,caractérisé par le fait que la largeur de bande passante, lors du dépassement de laquelle une impulsion de commande est délivrée, depend de la vitesse de la feuille continue.
  2. Procédé selon la revendication 1, caractérisé par le fait que la largeur de bande passante, lors du dépassement de laquelle une impulsion de commande est délivrée, est diminuée lorsque la vitesse de la feuille continue augmente.
  3. Procédé selon l'une des revendications précédentes, caractérisé par le fait que la largeur de bande passante, lors du dépassement de laquelle une impulsion de commande est délivrée, est modifiée de manière échelonnée, de préférence sous la forme d'un gradin.
  4. Procédé selon la revendication 3, caractérisé par le fait que la largeur de bande passante, lors du dépassement de laquelle une impulsion de commande est délivrée, est diminuée lors du dépassement d'une vitesse préétablie de la feuille continue, de préférence à 10 % de la vitesse finale.
  5. Procédé selon l'une des revendications précédentes, caractérisé par le fait que la distance (d) entre la feuille continue (2) et un capteur (10), mesurée lors du passage de la largeur de bande passante supérieure (B) à la largeur de bande passante inférieure (b), est retenue et est utilisée en tant que valeur moyenne pour la largeur de bande passante inférieure (b).
  6. Appareil pour la mise en oeuvre du procédé selon l'une des revendications précédentes, comportant au moins un capteur (10) qui est disposé au voisinage de la trajectoire de la feuille continue (2), comprend un émetteur (8) conçu pour un rayon de contrôle (12) dirigé vers la feuille continue (2) et un récepteur (9) destiné à un rayon réfléchi (13) renvoyé par la feuille continue (2), et est raccordé à un dispositif (11) de traitement de signaux, au moyen duquel la distance comprise entre l'émission du rayon de controle (12) et la reception du rayon réfléchi (13) peut être mesurée, et une impulsion de commande peut être engendrée dans le cas d'une distance excédant une largeur de bande passante préétablie, caractérisé par le fait que le dispositif (11) de traitement de signaux est réalisé sous la forme d'un calculateur pourvu d'une entrée pour un signal de vitesse de la feuille continue, et programmé de telle sorte que soit réglée, avant l'arrivée du signal de vitesse, une largeur de bande passante autre, de préférence plus grande (B) qu'après l'arrivée du signal de vitesse.
  7. Appareil selon la revendication 6, caractérisé par le fait que le calculateur formant le dispositif (11) de traitement de signaux est programmé de telle sorte que soit au moins mesurée la distance comprise entre la feuille continue (2) et le capteur (10),présente lors de l'arrivée du signal de vitesse, et que cette distance puisse êtreajustée en tant que centre de la largeur de bande passante inférieure (b), réglable après l'arrivée du signal de vitesse.
  8. Appareil selon la revendication 6 ou 7, caractérisé par le fait que chaque capteur (10) comprend un émetteur ultrasonique (8) et un récepteur ultrasonique (9).
  9. Appareil selon l'une des revendications précédentes 6 à 8, caractérisé par le fait que le dispositif (11) de traitement de signaux permet une mise hors fonction de l'entraînement de la machine, et/ou l'activation d'un dispositif (5) de capture de la feuille continue et/ou d'un dispositif de sectionnement de la feuille continue.
EP92103206A 1991-03-05 1992-02-26 Procédé et appareil pour surveiller une bande continue Expired - Lifetime EP0502408B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4106901A DE4106901C2 (de) 1991-03-05 1991-03-05 Verfahren und Vorrichtung zur Überwachung einer Bahn
DE4106901 1991-03-05

Publications (2)

Publication Number Publication Date
EP0502408A1 EP0502408A1 (fr) 1992-09-09
EP0502408B1 true EP0502408B1 (fr) 1994-08-10

Family

ID=6426463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92103206A Expired - Lifetime EP0502408B1 (fr) 1991-03-05 1992-02-26 Procédé et appareil pour surveiller une bande continue

Country Status (3)

Country Link
US (1) US5378918A (fr)
EP (1) EP0502408B1 (fr)
DE (2) DE4106901C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2746705A1 (fr) * 1996-03-27 1997-10-03 Heidelberg Harris Sa Dispositif de mesure sans contact de modifications de position d'une nappe continue de matiere
US5810235A (en) * 1995-05-22 1998-09-22 Heidelberger Druckmaschinen Ag Method for detecting disruptions in the transport of a paper web in a printing press

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10219541C1 (de) * 2002-05-02 2003-12-11 Koenig & Bauer Ag Vorrichtung zum Erfassen eines Bahnbruckes an einer eine Bahn verarbeitenden Maschine
US5694524A (en) * 1994-02-15 1997-12-02 R. R. Donnelley & Sons Company System and method for identifying conditions leading to a particular result in a multi-variant system
US6336106B1 (en) 1994-02-15 2002-01-01 R.R. Donnelley & Sons Company System and method for partitioning a real-valued attribute exhibiting windowed data characteristics
US6507832B1 (en) 1994-02-15 2003-01-14 R.R. Donnelley & Sons Company Using ink temperature gain to identify causes of web breaks in a printing system
US6098063A (en) * 1994-02-15 2000-08-01 R. R. Donnelley & Sons Device and method for identifying causes of web breaks in a printing system on web manufacturing attributes
DE4432659A1 (de) * 1994-09-14 1996-03-21 Kotterer Grafotec Einrichtung zum Verhindern von Druckwerksschäden
US5652388A (en) * 1995-08-21 1997-07-29 Baldwin Web Controls Apparatus and method for detecting printing press web breakage
US5778724A (en) * 1995-09-07 1998-07-14 Minnesota Mining & Mfg Method and device for monitoring web bagginess
US5725321A (en) * 1995-12-07 1998-03-10 Interbold Journal printer paper feed fault detection system for automated teller machine
US20020128990A1 (en) * 1997-05-01 2002-09-12 Kaminskas Paul A. Control methodology and apparatus for reducing delamination in a book binding system
FR2797218B1 (fr) * 1999-07-13 2001-11-23 Sept Electronique Procede et dispositif de detection de rupture de bande en defilement et presse d'imprimerie rotative a secheur d'encre equipee d'un tel dispositif
US6813941B2 (en) 2001-12-20 2004-11-09 Kimberly-Clark Worldwide, Inc. Method to measure tension in a moving web and to control properties of the web
DE102005041919B4 (de) * 2005-09-03 2008-05-29 Baldwin Germany Gmbh Bahnbruch-Überwachungseinrichtung für Rollenrotationsdruckmaschinen
CN100376390C (zh) * 2006-03-16 2008-03-26 上海高斯印刷设备有限公司 智能化光电断纸探测方法和装置
US8791703B2 (en) * 2011-04-13 2014-07-29 Hanergy Holding Group Ltd. Electrostatic probes for mapping conductive web bagginess
EP2826626B1 (fr) * 2013-07-15 2016-01-20 Goss Contiweb B.V. Système d'analyse de rupture de bande

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Publication number Priority date Publication date Assignee Title
US1999618A (en) * 1933-02-16 1935-04-30 Stanley Works Paper break control for printing presses and the like
DE2701992A1 (de) * 1977-01-19 1978-07-27 Heinz Walter Anordnung zur ueberwachung des laufes von insbesondere papierbahnen an druckmaschinen
US4186309A (en) * 1977-10-13 1980-01-29 Web Printing Controls Co. Inc., Web monitoring and control apparatus for web handling machinery
US4309618A (en) * 1980-05-05 1982-01-05 Bell Telephone Laboratories, Incorporated Precision optical distance measurement
DE3612957A1 (de) * 1986-04-17 1987-10-29 Mayer Helmut Rotatorisches bewegungssystem zur aufnahme und fuehrung von sensoren in der produktion kontinuierlich fortlaufenden bahnenmaterials
DE3614979C3 (de) * 1986-05-02 1999-12-16 Heidelberger Druckmasch Ag Sicherheitssystem für eine Druckmaschine
DE3822497A1 (de) * 1987-12-02 1989-10-19 Kotterer Grafotec Vorrichtung zum verhindern von maschinenschaeden
US5072414A (en) * 1989-07-31 1991-12-10 Accuweb, Inc. Ultrasonic web edge detection method and apparatus
DE3939226A1 (de) * 1989-11-28 1991-05-29 Kotterer Grafotec Bahnreissschalter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5810235A (en) * 1995-05-22 1998-09-22 Heidelberger Druckmaschinen Ag Method for detecting disruptions in the transport of a paper web in a printing press
FR2746705A1 (fr) * 1996-03-27 1997-10-03 Heidelberg Harris Sa Dispositif de mesure sans contact de modifications de position d'une nappe continue de matiere

Also Published As

Publication number Publication date
EP0502408A1 (fr) 1992-09-09
US5378918A (en) 1995-01-03
DE59200353D1 (de) 1994-09-15
DE4106901A1 (de) 1992-09-10
DE4106901C2 (de) 1994-05-26

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