EP0525450B1 - Dispositif pour couper et maintenir une bande déchirée - Google Patents

Dispositif pour couper et maintenir une bande déchirée Download PDF

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Publication number
EP0525450B1
EP0525450B1 EP92111510A EP92111510A EP0525450B1 EP 0525450 B1 EP0525450 B1 EP 0525450B1 EP 92111510 A EP92111510 A EP 92111510A EP 92111510 A EP92111510 A EP 92111510A EP 0525450 B1 EP0525450 B1 EP 0525450B1
Authority
EP
European Patent Office
Prior art keywords
blade
web
lifting beam
knife
elastic strips
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
EP92111510A
Other languages
German (de)
English (en)
Other versions
EP0525450A1 (fr
Inventor
Alfredo Rosas
Karl Veh
Werner Kettl
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 GmbH
Original Assignee
Grafotec Kotterer GmbH
Grafotec 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, Grafotec GmbH filed Critical Grafotec Kotterer GmbH
Publication of EP0525450A1 publication Critical patent/EP0525450A1/fr
Application granted granted Critical
Publication of EP0525450B1 publication Critical patent/EP0525450B1/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
    • B41F33/18—Web break detection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/02—Means for holding or positioning work with clamping means
    • B26D7/025—Means for holding or positioning work with clamping means acting upon planar surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/20—Safety devices preventing damage
    • B41P2233/21—Safety devices preventing damage by cutting the web in case of web break
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/525—Operation controlled by detector means responsive to work
    • Y10T83/541—Actuation of tool controlled in response to work-sensing means
    • Y10T83/543—Sensing means responsive to work indicium or irregularity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/748—With work immobilizer
    • Y10T83/7487—Means to clamp work
    • Y10T83/7493—Combined with, peculiarly related to, other element
    • Y10T83/7513—Tool or tool support on movable clamp jaw
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8752—Tool moves work to and against cooperating tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only

Definitions

  • the invention relates to a device for severing and holding a torn web for a web-processing machine, in particular a web-fed rotary printing press that prints on a printing material web, with a knife bar that has a fixed knife, crosses the transport plane of the web, and a lifting bar that has an increase that can be brought into active engagement with the knife which can be raised and lowered by means of an associated extension device which can be activated by means of a web break detector.
  • a device of this type is known for example from DE 38 22 497 A1.
  • the knife and the elevation of the lifting beam are arranged so that the knife can run past a side flank of the elevation. This results in an asymmetrical structure.
  • the consequence of this is that if one of the two ends of the cut paper web is to be held and only the other is to be released, one embodiment is necessary for both alternatives. Since both alternatives occur in practice, there has so far been a lot of construction work. In this context it can be assumed that one strand of a cut paper web is usually wound onto a roll and must therefore be released at the interface, while the other strand reaching to the web break is to be held.
  • Another disadvantage of the known arrangements is that the web cannot be cut reliably enough by means of the knife running past a flank of the elevation on the lifting beam side.
  • the web which is practically tension-free as a result of the web break, can avoid the knife here.
  • the known arrangements are not particularly useful when processing thicker materials.
  • Another, very special disadvantage of the known arrangements can also be seen in the high risk of injury. In this context it can be assumed that the knife passing a flank of the elevation is easily accessible from the side.
  • the knife bar contains two, the knife between them, the same, rail-shaped knife carrier, which are provided in the region of their side facing the walking beam with symmetrically arranged holders for the knife flanking, elastic strips which are opposite the cutting edge of the Knife protrude and are at least spaced from each other by the width of the elevation of the walking beam, which is symmetrical to the cutting plane and has two the flanking clamping surfaces associated with the elastic strips, provided with a cutting groove into which the knife can be inserted.
  • the clamping of the knife between two knife carriers results in which can have a closed profile cross-section due to the stationary knife arrangement, high stability and torsional rigidity.
  • Another advantage of the measures according to the invention can be seen in the fact that the lateral strips, one of which can function as a clamping strip, simultaneously shield the lateral access to the knife.
  • the elastic strips act as buffers, so that when the device according to the invention is slammed, metal does not meet metal, which is not only advantageous in terms of preventing impact noise, but also reduces the risk of accidents.
  • an operator may reach into the device according to the invention with one finger or with the whole hand. If the walking beam is actuated at such a moment, the fingers or the hand are pinched, but the elastic strips bring about a buffering, which dampens the impact.
  • EP 0 037 642 B1 also provides a device for separating and holding a torn web of printing material, in which the cutter bar is provided with two elastic strips projecting from the cutter flanked by it.
  • the knife is not arranged stationary, but is moved via a lever arrangement by means of the walking beam. This practically makes a symmetrical arrangement impossible, not to mention the loss of time associated with the double movement.
  • the walking beam needs a large stroke in spite of the double movement in order to have sufficient space for to create the fluttering movements of the web.
  • the cutter bar here requires a cross section which is open at the bottom, so that a torsionally soft arrangement results.
  • the moving knife only cuts past a flank of an elevation of the walking beam, so that problematic material is not cut reliably enough.
  • the web holding and separating device on which the drawings are based consists, as can best be seen from FIG. 1, of a frame 3 which is attached to the side walls 1 of a web processing machine, for example a web-fed rotary printing press, and which has a passage window 4 for the web 5 limited.
  • the upper and lower frame legs arranged to cross the transport plane of the web 5 are interconnected by side shields 6 connected.
  • the lower frame leg is formed by a stationary traverse 7 on which a walking beam 8 is received.
  • the upper frame leg is designed as a stationary knife bar 10 having a stationary knife 9.
  • Devices of this type are required in particular between the last printing unit and a dryer of a web-fed rotary printing press arranged downstream of it, but can also be provided between the individual printing units.
  • the lifting beam 8 is activated by means of a web break detector which is responsive in the event of a web break and is not shown here.
  • the knife bar 10 comprises, as can be seen in FIG. 2, two rectangular profile tube sections which act as knife carriers 11 and with which the knife 9 flanked thereby can be screwed.
  • the two knife carriers 11 are arranged symmetrically to the cutting plane s indicated by a dash-dotted line.
  • the knife 9 can be stepped or, as here, underlaid with a washer 12. The knife 9 projects with its cutting edge downward over the underside of the knife carrier 11.
  • holders 13 are provided which are arranged symmetrically to the cutting plane s for rubber strips 14a, 14b which project downwards over the cutting edge of the knife 9.
  • the holders 13 are designed as H-shaped profiles, which are fastened with their upper legs here with the interposition of a washer 15 on the respectively assigned knife carrier 11 and which have a downwardly open groove in which the respectively assigned rubber strip 14a, 14b can be inserted .
  • the rubber strips 14a, 14b are of different heights, so that one rubber strip, here the rubber strip 14a shown on the right, comes into play earlier than the other.
  • the walking beam 8 as FIG. 2 further shows, consists of a rail 16 which is approximately U-shaped in cross-section and is open at the bottom and into which the crossmember 7 can be immersed in the waiting position shown by solid lines.
  • a strip-shaped elevation 17 is provided, which has a cutting groove 18 arranged symmetrically to the cutting plane s.
  • a rubber strip 19 containing the cutting groove 18 can be provided, which is inserted into a groove delimited by two webs 20 formed on the rail 16.
  • Flat clamping surfaces 21 formed on both sides of the elevation 17 are formed by the upper web of the rail 16.
  • the clear distance between the rubber bar 14a, 14b on the knife bar side corresponds at least to the width of the elevation 17 and is approximately three times in the exemplary embodiment shown so big. Between the rubber strips 14a, 14b there is accordingly a wide channel 24 into which the knife 9 protrudes from above and into which the elevation 17 can be inserted from below.
  • the width of the rail 16 corresponds at least to the distance between the flanks of the rubber strips 14a, 14b facing away from one another, so that there is an associated clamping surface 21 across their entire width.
  • the height of the lifting beam-side elevation 17 is less than the elevation formed by the rubber strips 14a, 14b of the knife beam, so that the rubber strip 19 containing the cutting groove 18 does not completely touch the knife carrier 11 in the operating position indicated by dash-dotted lines.
  • the walking beam 8 can be moved by an extension device 22 from the waiting position indicated by solid lines to the operating position indicated by dash-dotted lines.
  • the extension device 22 can contain a swivel lever arrangement with swivel levers mounted on the cross member 7, which engage an associated window of the cross member 7 on the rail 16 and of which at least one is designed as a toggle lever, which on the other hand is equipped with an actuating cylinder, for example in the form of a pneumatic cylinder, is connected, which can be acted upon by the mediation of the web break detector with pressure medium.
  • the extension device 22 including the lifting cylinder is located within the cross member 7.
  • the walking beam 8 and the cutter bar 10 are spaced far apart, so that the web 5 is attached to it even in the event of a strong flutter movement does not graze.
  • the walking beam 8 is raised.
  • the higher rubber strip 14a of the cutter bar 10 runs onto the opposite clamping surface 21 of the walking beam.
  • the knife 9 comes into engagement with the cutting groove 18.
  • the second, somewhat lower rubber strip 14b remains slightly spaced from the opposite clamping surface 21. The web 5 is therefore clamped in the area of the higher rubber bar 14a, but not in the area of the lower rubber bar 14b.
  • the web 5 is severed by the knife 9 moving into the cutting groove 18, the web end produced in this way, facing the higher rubber bar 14 a, being held by it, while the other web end is held over the gap 23 remaining between the lower rubber bar and the clamping surface 21 spaced therefrom can be deducted, as indicated by an arrow in Figure 2.
  • the right side of the web is clamped. If the left side of the web is to be clamped, this can be accomplished by simply mounting the cutter bar 10 in a position turned through 180 °.
  • the rubber strips 14a, 14b simultaneously act as damping elements, which ensure that metal does not meet metal under any circumstances.
  • the channel 24 in which the cutting process takes place is laterally shielded. If an operator should get his fingers between the knife bar and the walking bar, the rubber bar 14a, 14b on the knife bar side and the rubber bar 19 on the walking bar side also provide the damping that is necessary to avoid serious injuries.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Details Of Cutting Devices (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Rotary Presses (AREA)
  • Adhesive Tape Dispensing Devices (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Claims (10)

  1. Dispositif pour couper et maintenir une bande déchirée dans une machine de traitement de bande, en particulier pour une machine d'impression rotative à bobines imprimant une bande de matière à imprimer, comportant une barre porte-lames (10) présentant une lame fixe (9) et agencée de manière à traverser le plan de transport de la bande, et un longeron mobile (8) présentant un rehaussement (17) qui peut être amené en coopération avec la lame (9), ledit longeron mobile (8) pouvant être levé et abaissé à l'aide d'un dispositif de déplacement correspondant (22) oui peut être activé par un détecteur de déchirure de la bande, caractérisé en ce que la barre porte-lames (10) contient deux porte-lame (11) en forme de rails, identiques, se soutenant l'un l'autre, qui sont équipés, dans la zone de leur côté tourné vers le longeron mobile (8), de lattes élastiques (14a, 14b) flanquant des supports (13) agencés symétriquement pour la lame (9), lesdites lattes faisant saillie vis-à-vis du tranchant de la lame (9) et étant distancées l'une de l'autre au moins de la largeur du rehaussement (17) du longeron mobile (8), qui est symétrique par rapport au plan de coupe (s) et présente deux surfaces de blocage (21) affectées aux lattes élastiques (14a, 14b) et flanquant le rehaussement (17) pourvu d'une rainure de coupe (18) dans lequel la lame (9) peut être introduite.
  2. Dispositif selon la revendication 1, caractérisé en ce que les lames élastiques (14a, 14b) ont une hauteur différente.
  3. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le dépassement d'au moins la latte élastique supérieure (14a) au-dessus du porte-lame (11) est plus grand que le dépassement du rehaussement (17) contenant la rainure de coupe (18) au-dessus des surfaces de blocage voisines (21).
  4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les lattes élastiques (14a, 14b) sont formées de lattes de caoutchouc.
  5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les lattes élastiques (14a, 14b) sont agencées de manière interchangeable.
  6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les supports (13) se présentent sous la forme de profilés en forme de H pourvus d'une rainured'insertion, qui sont agencés de préférence dans la zone des arêtes inférieures externes des porte-lame (11).
  7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les porte-lame (11) se présentent sous la forme de sections de tube profilées présentant une section transversale fermée, de préférence de forme rectangulaire.
  8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la barre porte-lames (10) peut être fixée avec les extrémités des porte-lame (11) de manière amovible sur un bâti contenant le longeron mobile (8), ledit bâti pouvant être reçu de manière amovible sur des consoles (2) disposées sur les parois latérales (1) de la machine de traitement de bande, et présente, de préférence, un flasque latéral (6) raccordant le longeron mobile (8) et la traverse (7) recevant le dispositif de déplacement (22) affecté au longeron à la barre porte-lames (10).
  9. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le longeron mobile (8) présente un profil ouvert côté traverse, de préférence en forme de U, à l'aide duquel la traverse (7) peut être engagée.
  10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le longeron mobile (8) est pourvu d'une rainure d'insertion centrale, ouverte côté lame, formée par deux barrettes (20) pour recevoir une latte (19) de préférence élastique, qui forme le rehaussement (17) pourvu de la rainure de coupe centrale (18).
EP92111510A 1991-07-23 1992-07-07 Dispositif pour couper et maintenir une bande déchirée Expired - Lifetime EP0525450B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4124391 1991-07-23
DE4124391A DE4124391C2 (de) 1991-07-23 1991-07-23 Vorrichtung zum Durchtrennen und Halten einer gerissenen Bahn

Publications (2)

Publication Number Publication Date
EP0525450A1 EP0525450A1 (fr) 1993-02-03
EP0525450B1 true EP0525450B1 (fr) 1995-10-04

Family

ID=6436829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92111510A Expired - Lifetime EP0525450B1 (fr) 1991-07-23 1992-07-07 Dispositif pour couper et maintenir une bande déchirée

Country Status (6)

Country Link
US (1) US5239903A (fr)
EP (1) EP0525450B1 (fr)
JP (1) JP3165932B2 (fr)
DE (3) DE9116763U1 (fr)
DK (1) DK0525450T3 (fr)
ES (1) ES2079746T3 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2720330B1 (fr) * 1994-05-26 1996-07-05 Pierre Tesseraud Dispositif coupe bande.
DE4432659A1 (de) * 1994-09-14 1996-03-21 Kotterer Grafotec Einrichtung zum Verhindern von Druckwerksschäden
US6105478A (en) * 1995-12-11 2000-08-22 Philip Morris Incorporated Device for opening and feeding a roll
JP2002505647A (ja) * 1996-10-11 2002-02-19 ケーニツヒ ウント バウエル アクチエンゲゼルシヤフト 印刷キャリアのための保持装置
GB2329861B (en) * 1997-10-01 2000-03-29 Kenneth Hughes Williams Apparatus and method for cutting insulating material
DE10222586A1 (de) * 2002-05-22 2003-12-04 Voith Paper Patent Gmbh Einrichtung zum Behandeln einer entlang eines Materialwegs geführten Materialbahn und Verfahren zur Ausnahmebehandlung, insbesondere zur Reaktion auf einen Bahnabriss
DE10222587A1 (de) * 2002-05-22 2003-12-04 Voith Paper Patent Gmbh Einrichtung zum Behandeln einer entlang eines Materialwegs geführten Materialbahn und Verfahren zur Ausnahmebehandlung, insbesondere zur Reaktion auf einen Bahnabriss
DE102005023396B3 (de) * 2005-05-20 2006-11-02 Michael Nebert Verfahren zum automatisierten Reparieren einer Papierbahn, Vorrichtung hierzu sowie Papierverarbeitungsmaschine
DE102010026409A1 (de) * 2010-07-07 2012-01-12 Wemhöner Systems Technologies AG Verfahren und Vorrichtung zum Durchtrennen einer laufenden Materialbahn
CN103496015B (zh) * 2013-09-30 2015-08-19 哈尔滨博真科技有限公司 一种具有位置检测功能的多工位高压水切割装置
CN117464198B (zh) * 2023-12-13 2024-04-30 浙江嘉益保温科技股份有限公司 一种保温杯生产用环切装置

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US2293721A (en) * 1941-08-11 1942-08-25 Gen Tire & Rubber Co Method of and apparatus for cutting and splicing thick rubber stock and the like
US2336957A (en) * 1942-10-02 1943-12-14 Bemis Bro Bag Co Cutoff machine
US2653536A (en) * 1951-06-27 1953-09-29 Edwin G Koriath Method and apparatus for control of webs in web-handling machines
US3082923A (en) * 1959-11-20 1963-03-26 Grace W R & Co Apparatus for cutting sheet material
US3277756A (en) * 1965-04-22 1966-10-11 Donnelley & Sons Co Rotary web cutter and stripper assembly
US3685251A (en) * 1970-03-26 1972-08-22 Mahaffy & Harder Eng Co Automatic packaging apparatus with improved means for cutting and contour trimming of packages
US4295400A (en) * 1980-03-31 1981-10-20 Baldwin-Korthe Web Controls, Inc. Web severing device
DE3431686A1 (de) * 1984-08-29 1986-04-24 Werner J. 8901 Diedorf Kotterer Vorrichtung zum verhindern maschinenschaedigender wickler
DE3439618A1 (de) * 1984-10-30 1986-04-30 Salmco Technik GmbH, 2000 Hamburg Vorrichtung zum herstellen und zufuehren von trennblaettern fuer in scheiben geschnittene lebensmittel
US4799997A (en) * 1987-08-06 1989-01-24 Westvaco Corporation System for sensing a discontinuity in a paper web and containing web puncturing means across the web width
DE3822497A1 (de) * 1987-12-02 1989-10-19 Kotterer Grafotec Vorrichtung zum verhindern von maschinenschaeden
DE8915572U1 (de) * 1989-09-02 1990-10-25 Koenig & Bauer AG, 8700 Würzburg Papierbahntrenn- und -halteeinrichtung

Also Published As

Publication number Publication date
ES2079746T3 (es) 1996-01-16
EP0525450A1 (fr) 1993-02-03
DE9116763U1 (de) 1993-11-18
DE4124391A1 (de) 1993-01-28
US5239903A (en) 1993-08-31
DK0525450T3 (da) 1996-03-04
DE59203886D1 (de) 1995-11-09
JPH05237797A (ja) 1993-09-17
DE4124391C2 (de) 1995-08-31
JP3165932B2 (ja) 2001-05-14

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