EP1760019A2 - Dispositif de surveillance des ruptures de bande dans une machine rotative d'impression - Google Patents

Dispositif de surveillance des ruptures de bande dans une machine rotative d'impression Download PDF

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Publication number
EP1760019A2
EP1760019A2 EP06117683A EP06117683A EP1760019A2 EP 1760019 A2 EP1760019 A2 EP 1760019A2 EP 06117683 A EP06117683 A EP 06117683A EP 06117683 A EP06117683 A EP 06117683A EP 1760019 A2 EP1760019 A2 EP 1760019A2
Authority
EP
European Patent Office
Prior art keywords
web
printing
compressed air
longitudinal
detection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06117683A
Other languages
German (de)
English (en)
Other versions
EP1760019B1 (fr
EP1760019A3 (fr
Inventor
Bernhard Brandmeier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baldwin Germany GmbH
Original Assignee
Baldwin Germany GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baldwin Germany GmbH filed Critical Baldwin Germany GmbH
Publication of EP1760019A2 publication Critical patent/EP1760019A2/fr
Publication of EP1760019A3 publication Critical patent/EP1760019A3/fr
Application granted granted Critical
Publication of EP1760019B1 publication Critical patent/EP1760019B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B41F33/18—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
    • B65H2553/00—Sensing or detecting means
    • B65H2553/10—Sensing or detecting means using fluids, e.g. pneumatics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
    • B65H2553/41—Photoelectric detectors
    • B65H2553/412—Photoelectric detectors in barrier arrangements, i.e. emitter facing a receptor element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/13—Parts concerned of the handled material
    • B65H2701/131—Edges
    • B65H2701/1315—Edges side edges, i.e. regarded in context of transport

Definitions

  • the invention relates to a web break monitoring device for web-fed rotary printing presses according to the preamble of claim 1.
  • a web breakage monitoring device of this type for web-fed rotary printing presses is known from US 5,156,062 DE 39 39 226 A1 known. It can be placed in the printing press at any convenient location. It is preferably arranged between the last printing unit of the printing press and a dryer for drying the printing web, since a web break most often arises in the dryer.
  • a device for detecting web defects prior to the first printing unit of a web-fed rotary printing press contains sensors which contain a large number of optical fibers and produce a signal dependent on the shading of the light guide beams by the printing path.
  • the invention enables the problem to be solved to increase the functional reliability in a web break monitoring device of the type mentioned.
  • the monitoring device generates a web break signal even if the web tension drops so far for a reason other than a web break that a web edge longitudinal strip disappears from the detection area of the detection device.
  • the monitoring device can therefore be used independently of a web break in general for monitoring the tension of the Betigbahn.
  • FIG. 1 of the drawings from a web-fed rotary printing press schematically shows parts of the last printing unit of several printing units.
  • a plate cylinder 3 an upper blanket cylinder 4 and a lower blanket cylinder 6 of an offset web-fed rotary printing machine are shown, between which the printing web 8 passes during printing operation in the direction of web movement 10.
  • a web-fed rotary printing press may include one or more printing units 2.
  • a web catcher 12 is shown schematically. It can be of any embodiment and serves to clamp in the event of a web break following the fracture point of the Bescherbahn 8 and Tozulenken out of the printing press.
  • the web catcher 12 may, for. B. a catch roller 14 and a contact roller 16 (trolly roller) included.
  • the Bescherbahn 8 runs without jamming between the two rollers 14 and 16 therethrough.
  • the web is pinched between the two rollers 14, 16 and deflected downwardly.
  • the Bescherbahn 8 runs in normal operation after the catcher 12 through a dryer 18 for drying the printing ink.
  • a web break monitoring device 20 comprises at least one web longitudinal strip 22 or 24, preferably for both web longitudinal strips 22 and 24 of the printing web 8 each at least one detection device 26 which is directed transversely to the web plane on the relevant web longitudinal strips 22 and 24 of the printing web 8 for detecting the web longitudinal strip of the printed web under tension under proper printing operation 8 and for generating a web break signal when the web edge longitudinal strips 22, 24 disappears when falling of the tension of the Bechristbahn due to a web break from the detection range of the detection device 26.
  • the web break monitoring device 20 contains for at least one, preferably for both web edge longitudinal strips 22 and 24, in each case a pneumatic deflection device 30 arranged close to the detection device 26.
  • the deflection device 30 contains at least one or, according to the preferred embodiment according to the drawings, two close to the detection device 26 of the respective web edge longitudinal strips 22 and 24 directed transversely to the web plane on the web longitudinal edge strips 22 and 24 compressed air nozzles 32 and 34, the compressed air jets 35 and 36 acting transversely to the web plane on the web longitudinal edge strips 22 and 24, at trouble-free operation of the tension the printing path can be overcome, permanent pneumatic Generate deflection force.
  • the elements of the detection device 26 and the deflection device 30 that act on the printing web 8 can be arranged anywhere within the printing press and are preferably arranged where most frequently a break (tear) of the printing web 8 occurs.
  • the elements of the detection device 26 and the deflection device 30 are preferably arranged between the last printing unit and the dryer 18, in particular preferably between the catcher 12 and the dryer 18 according to FIG. 1. These elements may be attached to a non-rotating part of the web catcher 12 or to the dryer 18 or separately to a stationary element of the printing press.
  • the tension of the printing web 8 drops so far that the printing web 8 is moved out of the detection range of the detection device 26 due to the permanently generated pneumatic deflection force of the compressed air jets 35 and 36.
  • the detection device 26 no longer finds the web edge longitudinal strip 22 or 24 in the detection area, it generates a web break signal (eg an electrical or pneumatic or hydraulic), which is schematically represented by an arrow 40 in FIG.
  • a web break signal eg an electrical or pneumatic or hydraulic
  • the web break signal 40 has the value zero and zero in web-break printing operation is automatically switched to a non-zero value when a web break occurs, z. B. to a positive or negative electrical signal value.
  • the detection device 26 continuously generates a signal which is automatically switched off in the event of a detected web break, so that the signal which has been switched off (zero signal value) is the web break signal 40.
  • a deviating from the value zero signal is constantly generated, which is different in orbit-free printing operation as in a detected web break.
  • the web break signal 40 is turned on when, by dropping the tension of the printing web 8, a web break is detected, all the described embodiments being meant hereby.
  • the Bescherbahn 8 would fall out of the detection range of the detection device 26 at a web break without the pneumatic deflection of the compressed air jets 35 and 36 of the compressed air nozzles 26, but only much later than in the support by the pneumatic deflection.
  • each compressed air nozzle 32 is arranged in front of the detection device 26 and another compressed air nozzle 34 after the detection device 26.
  • the detection device 26 may be implemented in various embodiments, for. B. as a pneumatic or electrical proximity switch which, depending on the distance from the Betikbahn 8 or depending on whether the Betikbahn 8 is in his sensor area or not, generates a defined signal.
  • the detection device 26 may comprise a reflex light barrier which has a light emitter and a light receiver on the same web side.
  • the detection device 26 preferably includes a transmitter 41 on one side of the web and a receiver 42 on the other side of the web for transmitting a detection beam 43 along a rectilinear detection axis 44 which crosses the region of the web edge 22 or 24 and thereby only from the printing web 8 is interrupted when it is under tension.
  • the transmitter 41 and the receiver 42 preferably form a light barrier, preferably an infrared light barrier whose light beam is the detection beam 43.
  • the transmitter 41 (or the receiver 42) is preferably arranged in the web movement direction 10 between the two compressed-air nozzles 32 and 34 and / or in the web transverse direction offset from the compressed-air nozzles 32 and 34.
  • a transmitter 41 such a receiver 42 and the two compressed air nozzles 32 and 34 (or only a compressed air nozzle 32 or 34) may be combined to form a monitoring unit 45 and 46, respectively.
  • a control device 50 which responds to a web speed signal 52 changing with changing web speed of the printing web 8 and, depending on this, in a predetermined ratio reduces the pneumatic deflection force of the compressed air jets 36 acting on the printing web 8 with decreasing web speed and with increasing web speed elevated.
  • the pneumatic deflection force preferably has a predetermined strength at a predetermined line speed.
  • the deflection force can be variable proportionally, disproportionately or less than proportionally or in another mode of operation as a function of the web speed, which in turn may depend on the type of printing press and / or on the material of the printing web 8.
  • the pneumatic deflection force of the compressed air jets 35 and 36 is set according to the invention to a much higher value without the Betikbahn 8 pushed out of the range of detection beams 43 of the detection device 26 than at a lower line speed.
  • This results according to the invention has the advantage that at high web speed, a high pneumatic deflection force of the compressed air jets 35 and 36 acts to push the Betikbahn 8 in the event of a web break quickly out of the detection range of the detection beam 43.
  • the deflection force according to the invention is automatically reduced at lower web speed to such an extent that the deflection force can not push the break-free printing web 8 out of the detection beam 43 of the detection device 26. In both cases, however, in the case of a web break, a very fast deflection of the printing web 8 out of the detection beam 43 of the detection device 26 is achieved.
  • the change in the strength of the pneumatic deflection force is preferably carried out by a corresponding change in pressure of the compressed air, which the nozzles 32, 34 from a compressed air source 54 via a Druckeinstellelement 56, z. B. a pressure regulator or a pressure relief valve, is supplied. Additionally or alternatively, an alternative embodiment is to change the jet direction of the compressed-air nozzles 32 and 34 relative to the printing web 8 in order to change the pneumatic deflection force acting on the printing web.
  • the control of the Druckeinstellelements 56 or the jet direction of the compressed air nozzles 32, 34 takes place automatically by the control device 50.
  • the control device 50 preferably receives the electrical (or pneumatic) web speed signal 52, which is dependent on the web speed of the printing web 8 with regard to its thickness, by a printing machine control device.
  • the printing press control device usually generates a web speed signal dependent on the web speed for other functions of the printing press.
  • the web speed signal 52 could also be generated by a buzzer activated by a cylinder, roller or roller which rotates at the speed of the printing web 8.
  • the detection axis 44 between transmitter 41 and receiver 42 is preferably arranged obliquely inclined to the web plane of the Beyakbahn 8 according to Figures 3 and 4, so that one of the two cooperating parts transmitter 41 or receiver 42 of the detection axis 44 from the web transverse center is farther away than that other part.
  • the one part which z. B. the receiver 42 is arranged laterally outside the width of the Betikbahn 8, so that the Betikbahn 8 can be deflected by the compressed air jets 35, 36 at this one part 42 overcoming disability in the event of a web break.
  • the at least one compressed-air nozzle 32, 34 is or are arranged on the same web side of the printing web 8 at a distance from the Betikbahn 8 as the other part, z. B. the transmitter 41, which is arranged closer to the web transverse center than the relevant one part, z. B. the receiver 42nd
  • FIGS. 3 and 4 one part is the receiver 42 and the other part is the transmitter 41, but these parts could also be interchanged.
  • the web longitudinal edge strips 22, 24 blown away by the compressed air jets 35 and 36 are shown in dashed lines in FIGS. 3 and 4, while the printing web 8 is shown in straight lines in a straight line in the transverse direction, as is the case under tension under normal printing operation stands.
  • the pneumatic deflecting force of the at least one compressed air jet 35 or 36 is set so high and if the at least one compressed air jet 35 or 36 is so far from the web longitudinal edge 60 or 62 removes on the web longitudinal edge strips 22 and 24, respectively, that the pneumatic deflection force generates a depression 64 or 66 extending in the longitudinal direction of the web in the printing web 8 in the area of the web longitudinal edge strips 22 and 24 at the tensioning tension of the printing web 8 suitable for normal printing operation.
  • the troughs 64 and 66 the web longitudinal edge strips 22 and 24 are stiffened. As a result, a flutter of the paper edges is avoided and thus improves the reliability of the monitoring device.
  • the detection axis 44 and thus also the detection beam 43 such that they intersect the longitudinal web edge strips 22 and 24 respectively in the region of the trough 64 and 66, preferably in the region of the outer trough half and more preferably very close to the longitudinal edge of the web 60 or 62.
  • the web longitudinal edge strip 22 or 24 already comes out of the detection axis 44 and thus also out of the detection beam 43 even with a small deflection by the compressed air jets 35 or 36.
  • the monitoring device thus generates a web break signal 40 very quickly when, in the event of a break in the printing web 8, its tensile stress suddenly decreases.
  • At least two compressed-air nozzles corresponding to the two compressed-air nozzles 32 and 34 are provided for at least one of the two web longitudinal edge strips 22 and 24, preferably for both which the compressed air jet 35 (or 36) of a compressed air nozzle 32 (or 34) closer to the web longitudinal edge 60 and 62 directed to the web longitudinal edge strips 22 and 24 as the compressed air jet 36 (or 35) of the other compressed air nozzle 34 (or 32).
  • the two compressed air jets 34 and 36 thus act at locations on the Betikbahn 8, which are arranged offset in the web width direction to each other.

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP06117683A 2005-09-03 2006-07-21 Dispositif de surveillance des ruptures de bande dans une machine rotative d'impression Expired - Fee Related EP1760019B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005041919A DE102005041919B4 (de) 2005-09-03 2005-09-03 Bahnbruch-Überwachungseinrichtung für Rollenrotationsdruckmaschinen

Publications (3)

Publication Number Publication Date
EP1760019A2 true EP1760019A2 (fr) 2007-03-07
EP1760019A3 EP1760019A3 (fr) 2007-07-18
EP1760019B1 EP1760019B1 (fr) 2009-04-01

Family

ID=37663146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06117683A Expired - Fee Related EP1760019B1 (fr) 2005-09-03 2006-07-21 Dispositif de surveillance des ruptures de bande dans une machine rotative d'impression

Country Status (4)

Country Link
US (1) US20070194258A1 (fr)
EP (1) EP1760019B1 (fr)
JP (1) JP4352067B2 (fr)
DE (2) DE102005041919B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916211A2 (fr) * 2006-10-28 2008-04-30 Baldwin Germany GmbH Dispositif attrapeur de feuilles automatique pour des presses rotatives à rouleaux

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8157199B2 (en) * 2005-08-31 2012-04-17 Kimberly-Clark Worldwide, Inc. Rewinder web chop with early detection and web diversion to eliminate equipment damage
US8943934B2 (en) * 2011-10-14 2015-02-03 Hasko Machines Apparatus and method for removing board edge waste strips in a ripsawing operation
JP6187647B1 (ja) * 2016-07-28 2017-08-30 富士ゼロックス株式会社 画像形成装置、連続媒体搬送装置、および画像形成システム
CN112277456B (zh) * 2020-10-16 2022-04-05 深圳市雅佳图印刷有限公司 一种基于智能制造印刷用的压平装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3939226A1 (de) 1989-11-28 1991-05-29 Kotterer Grafotec Bahnreissschalter
EP0895860B1 (fr) 1997-08-07 2002-10-23 Baldwin Germany GmbH Dispositif pour éviter des détériorations d'un élement d'impression

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4643414A (en) * 1984-04-07 1987-02-17 Miller-Johannisberg Druckmaschinen Gmbh Sheet-delivery control and regulating apparatus
DE3939190A1 (de) * 1989-01-25 1990-08-09 Baldwin Gegenheimer Gmbh Durchlauftrockner von rollenrotationsdruckmaschinen und betrieb eines derartigen durchlauftrockners bei fortdruck und beim zylinderwaschen mit laufender bahn
DE4029366C2 (de) * 1990-09-15 1995-07-06 Kotterer Grafotec Vorrichtung zum Fangen und Halten einer gerissenen Bedruckstoffbahn
US5134788A (en) * 1990-12-20 1992-08-04 Advance Systems Inc. Dryer apparatus for floating a running web and having an exhaust flow rate control system
US5389795A (en) * 1991-02-11 1995-02-14 Rye; Timothy W. Method and apparatus for directing air and optical signals to detect edge cracks and other absences of product
DE4106901C2 (de) * 1991-03-05 1994-05-26 Kotterer Grafotec Verfahren und Vorrichtung zur Überwachung einer Bahn
US6298782B1 (en) * 1993-03-25 2001-10-09 Baldwin Web Controls Anti-wrap device for a web press
JP3577288B2 (ja) * 2001-04-09 2004-10-13 株式会社東京機械製作所 輪転機の停電時制御方法及び停電時制御装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3939226A1 (de) 1989-11-28 1991-05-29 Kotterer Grafotec Bahnreissschalter
EP0895860B1 (fr) 1997-08-07 2002-10-23 Baldwin Germany GmbH Dispositif pour éviter des détériorations d'un élement d'impression

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916211A2 (fr) * 2006-10-28 2008-04-30 Baldwin Germany GmbH Dispositif attrapeur de feuilles automatique pour des presses rotatives à rouleaux
EP1916211A3 (fr) * 2006-10-28 2009-06-24 Baldwin Germany GmbH Dispositif attrapeur de feuilles automatique pour des presses rotatives à rouleaux

Also Published As

Publication number Publication date
DE102005041919A1 (de) 2007-03-15
DE502006003309D1 (de) 2009-05-14
US20070194258A1 (en) 2007-08-23
EP1760019B1 (fr) 2009-04-01
DE102005041919B4 (de) 2008-05-29
JP2007069610A (ja) 2007-03-22
JP4352067B2 (ja) 2009-10-28
EP1760019A3 (fr) 2007-07-18

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