EP0225988B1 - Lateral-expansion device - Google Patents

Lateral-expansion device Download PDF

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Publication number
EP0225988B1
EP0225988B1 EP86114332A EP86114332A EP0225988B1 EP 0225988 B1 EP0225988 B1 EP 0225988B1 EP 86114332 A EP86114332 A EP 86114332A EP 86114332 A EP86114332 A EP 86114332A EP 0225988 B1 EP0225988 B1 EP 0225988B1
Authority
EP
European Patent Office
Prior art keywords
roller
rollers
sections
spreader
casing sections
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
Application number
EP86114332A
Other languages
German (de)
French (fr)
Other versions
EP0225988A1 (en
Inventor
Klaus Theilacker
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0225988A1 publication Critical patent/EP0225988A1/en
Application granted granted Critical
Publication of EP0225988B1 publication Critical patent/EP0225988B1/en
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/36—Guiding mechanisms
    • D21F1/40—Rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/022—Registering, tensioning, smoothing or guiding webs transversely by tentering devices
    • B65H23/025—Registering, tensioning, smoothing or guiding webs transversely by tentering devices by rollers
    • B65H23/0251—Registering, tensioning, smoothing or guiding webs transversely by tentering devices by rollers with a straight axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/34—Apparatus for taking-out curl from webs

Definitions

  • the invention relates to a spreader device with spreader rollers with a plurality of roller sections for running material webs, in particular for printing material webs.
  • rollers which, arranged axially next to one another, form an spreader roller which is arranged transversely to a running material web made of paper or the like.
  • the degree of curvature of the spreader roller can be individually adjusted on the individual rollers.
  • Such a spreading device composed of several axially adjacent rollers is structurally complex since considerable mechanical means are required for the required adjustment of the curvature.
  • FIGS. 1 and 3 each show the spreader roller pair according to the invention, with FIGS. 2 and 4 showing sections (1, 2 and 3) through the spreader roller pair consisting of the rollers (4, 5).
  • a material web to be transported for example a print carrier web (6)
  • the rollers (4, 5) are arranged parallel to one another.
  • At least one of the rollers, but preferably both rollers (4, 5) are axially displaceable. For this purpose, they are mounted in side walls in a corresponding manner via roller journals, not shown.
  • the axial displaceability of the rollers (4, 5) must be stepless and possible while the print carrier web (6) is running.
  • the rollers (4, 5) have circular but only partially cylindrical cross sections. They taper towards one end.
  • the roller (4) has a jacket (7) with three jacket sections (7a, 7b, 7c).
  • the jacket (8) of the roller (5) consists of three sections (8a, 8b, 8c).
  • a cylindrical jacket section for example (7a) with the largest diameter (D1)
  • a cylindrical jacket section (8a) with the smallest diameter (d1) opposite the other roller (5).
  • the largest diameter (d3) of the roller (5) of the cylindrical jacket section (8c) is opposite a cylindrical jacket section (7c) of the roller (4) with the smallest diameter (D3).
  • the slope of the conical or bulbous sections (7b and 8b) lying between the above-mentioned jacket sections runs in the opposite direction.
  • Fig. 1 shows the rollers (4, 5) in the neutral center position, in which the looping path of the print carrier web (6) is the same length at every point over the entire roller width.
  • the sum of the diameters (D1 to D3) of the roller (4) and the diameter (d1 to d3) of the Roller (5) is the same size at every point, for example at the cuts (1, 2, 3). This can best be seen from FIG. 2.
  • rollers (4, 5) move in the opposite direction, in relation to the direction of the arrows (9, 10), the opposite is achieved, namely an increase in tension in the middle of the print carrier web (6) with respect to the edge zones.
  • the tangent of the taper angle of the tapered rollers in the middle casing sections (7b, 8b) must always be sufficiently smaller than the coefficient of friction between the rollers (4, 5) and the print carrier web (6).
  • the smoothing effect of the print carrier web (6) running through the spreader rollers (4, 5) can be optimized by making a hard transition from the cylindrical jacket sections (7a, 8a and 7c, 8c) to the conical jacket sections (7b, 8b) avoids.
  • a mathematically determined curve shape e.g. B. after a sine function, this transition can be shaped fluently, so that the rollers (4, 5) in the form similar to that of bottles.
  • a tension optimum can be set for each type of paper that is processed as a print carrier.
  • the spreader roller arrangement according to the invention influences such as different paper thicknesses or material-related fluctuations in elastic modulus can thus be eliminated in their effect over the width of the printing medium web.
  • the different stretching between the center of the print carrier web and its edge zone can be eliminated with the spreader rollers (4, 5) according to the invention.
  • This also prevents the web from fluttering or tending to wrinkle.
  • the spreader roller pair (4, 5) according to the invention can be arranged as often as desired in rotary printing presses, for example between the first printing unit and the feed unit and between individual printing units or in the folding structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Rotary Presses (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)

Description

Die Erfindung betrifft eine Breitstreckvorrichtung mit Breitstreckwalzen mit mehreren Walzenabschnitten für laufende Werkstoffbahnen, insbesondere für Bedruckstoffbahnen.The invention relates to a spreader device with spreader rollers with a plurality of roller sections for running material webs, in particular for printing material webs.

Aus der DE-AS-2139159 sind bereits Walzen bekannt, die axial nebeneinander angeordnet eine Breitstreckwalze bilden, die quer zu einer laufenden Werkstoffbahn aus Papier oder dgl. angeordnet wird. Der Grad der Krümmung der Breitstreckwalze ist an den einzelnen Walzen individuell einstellbar. Eine derartige aus mehreren axial nebeneinanderliegenden Walzen zusammengesetzte Breitstreckvorrichtung ist konstruktiv aufwendig, da für die erforderliche Verstellung der Krümmung erhebliche mechanische Mittel benötigt werden.From DE-AS-2139159 rollers are already known which, arranged axially next to one another, form an spreader roller which is arranged transversely to a running material web made of paper or the like. The degree of curvature of the spreader roller can be individually adjusted on the individual rollers. Such a spreading device composed of several axially adjacent rollers is structurally complex since considerable mechanical means are required for the required adjustment of the curvature.

Aufgabe der Erfindung ist es, Breitstreckwalzenpaare zu schaffen, die keine Mittel zur Verstellung der Walzenkrümmung benötigen, die also mit starren Walzenmänteln ausgestattet werden können, wobei dennoch unterschiedliche Breitstreckwirkungen erzielbar sein sollen. Diese Aufgabe wird durch die Anwendung der Merkmale des kennzeichnenden Teils des Patentanspruchs gelöst. Weiterbildungen ergeben sich aus der Beschreibung in Verbindung mit den Zeichnungen. In diesen zeigen jeweils schematisch :

  • Fig. 1 und 2 ein erfindungsgemäßes Breitstreckwalzenpaar in zwei Ansichten in einer ersten Axialposition und
  • Fig. 3 und 4 das erfindungsgemäße Breitstreckwalzenpaar in einer zweiten axial zueinander verschobenen Position.
The object of the invention is to provide pairs of spreader rolls which do not require any means for adjusting the roll curvature and which can therefore be equipped with rigid roll mantles, yet different spreader effects should be achievable. This object is achieved by applying the features of the characterizing part of the patent claim. Further developments result from the description in connection with the drawings. Each of these shows schematically:
  • 1 and 2 an inventive spreader roller pair in two views in a first axial position and
  • 3 and 4, the pair of spreader rollers according to the invention in a second position axially displaced relative to one another.

In den Figuren 1 und 3 ist jeweils das erfindungsgemäße Breitstreckwalzenpaar dargestellt, wobei in den Figuren 2 und 4 Schnitte (1, 2 und 3) durch das aus den Walzen (4, 5) bestehende Breitstreckwalzenpaar gezeigt sind. Wie die Figuren 2 und 4 erkennen lassen, wird eine zu transportiende Werkstoffbahn, beispielsweise eine Druckträgerbahn (6) S-förmig um die Walzen (4, 5) geführt. Die Walzen (4, 5) sind parallel zueinander angeordnet. Mindestens eine der Walzen, aber vorzugsweise beide Walzen (4, 5) sind axial verschiebbar. Hierfür sind diese über nicht dargestellte Walzenzapfen in entsprechender Weise in Seitenwänden gelagert. Die axiale Verschiebbarkeit der Walzen (4, 5) muß stufenlos und während des Laufens der Druckträgerbahn (6) möglich sein.FIGS. 1 and 3 each show the spreader roller pair according to the invention, with FIGS. 2 and 4 showing sections (1, 2 and 3) through the spreader roller pair consisting of the rollers (4, 5). As can be seen in FIGS. 2 and 4, a material web to be transported, for example a print carrier web (6), is guided in an S-shape around the rollers (4, 5). The rollers (4, 5) are arranged parallel to one another. At least one of the rollers, but preferably both rollers (4, 5) are axially displaceable. For this purpose, they are mounted in side walls in a corresponding manner via roller journals, not shown. The axial displaceability of the rollers (4, 5) must be stepless and possible while the print carrier web (6) is running.

Wie aus den Zeichnungen hervorgeht, weisen die Walzen (4, 5) zwar kreisförmige aber nur teilweise zylindrische Querschnitte auf. Sie verjüngen sich jeweils zum einen Ende hin. So weist die Walze (4) eine Mantel (7) mit drei Mantelabschnitten (7a, 7b, 7c) auf. In gleicher Weise besteht auch der Mantel (8) der Walze (5) aus drei Abschnitten (8a, 8b, 8c).As can be seen from the drawings, the rollers (4, 5) have circular but only partially cylindrical cross sections. They taper towards one end. The roller (4) has a jacket (7) with three jacket sections (7a, 7b, 7c). In the same way, the jacket (8) of the roller (5) consists of three sections (8a, 8b, 8c).

Erfindungsgemäß liegt jeweils an einem Ende eines zylindrischen Mantelabschnitts, beispielsweise (7a) mit größtem Durchmesser (D1) ein zylindrischer Manteiabschnitt (8a) mit kleinstem Durchmesser (d1) der anderen Walze (5) gegenüber. In der gleichen Weise liegt dem größten Durchmesser (d3) der Walze (5) des zylindrischen Mantelabschnittes (8c) ein zylindrischer Mantelabschnitt (7c) der Walze (4) mit dem kleinsten Durchmesser (D3) gegenüber. Die Steigung der zwischen den genannten Mantelabschnitten liegenden konischen oder bauchigen Abschnitte (7b und 8b) verläuft in entgegengesetzer Richtung.According to the invention, at each end of a cylindrical jacket section, for example (7a) with the largest diameter (D1), there is a cylindrical jacket section (8a) with the smallest diameter (d1) opposite the other roller (5). In the same way, the largest diameter (d3) of the roller (5) of the cylindrical jacket section (8c) is opposite a cylindrical jacket section (7c) of the roller (4) with the smallest diameter (D3). The slope of the conical or bulbous sections (7b and 8b) lying between the above-mentioned jacket sections runs in the opposite direction.

Fig. 1 zeigt die Walzen (4, 5) in der neutralen Mittelstellung, bei der der Umschlingungsweg der Druckträgerbahn (6) über die gesamte Walzenbreite gesehen an jeder Stelle gleich lang ist. Abgesehen von unbedeutenden Differenzen, bedingt durch die sich ändernde Tangentenlage der Druckträgerbahn (6) zwischen den Walzen (4 und 5) gilt, daß die Summe der Durchmesser (D1 bis D3) der Walze (4) und der Durchmesser (d1 bis d3) der Walze (5) an jeder Stelle, beispielsweise an den Schnitten (1, 2, 3) gleich groß ist. Dies ist am besten aus Fig. 2 erkennbar.Fig. 1 shows the rollers (4, 5) in the neutral center position, in which the looping path of the print carrier web (6) is the same length at every point over the entire roller width. Apart from insignificant differences, due to the changing tangent position of the print carrier web (6) between the rollers (4 and 5), the sum of the diameters (D1 to D3) of the roller (4) and the diameter (d1 to d3) of the Roller (5) is the same size at every point, for example at the cuts (1, 2, 3). This can best be seen from FIG. 2.

Wenn die Walzen (4, 5) axial auseinanderbewegt werden, wie durch die Pfeile (9, 10) in Fig. 3 angedeutet ist, bleiben die Umschlingungen an den zylindrischen Mantelabschnitten (7a, 8a, 7c, 8c) unverändert gleich groß. Die mittleren Walzenabschnitte (7b und 8b) sind jedoch in der Summe kleiner geworden, so daß die Umschlingung in diesem Bereich für die Druckträgerbahn (6) ebenfalls kleiner geworden ist. Dies bewirkt, daß in der Druckträgerbahnmitte ein kürzerer Umweg und somit eine geringere Spannung als in den äußeren Mantelabschnitten herrscht. Durch eine größere Voreilung im Antrieb kann nun bekanntlich die Spannung in der Bahnmitte konstant gehalten werden, so daß am Bahnrand eine Spannungserhöhung erzeugt wird.If the rollers (4, 5) are moved axially apart, as indicated by the arrows (9, 10) in Fig. 3, the wraps on the cylindrical jacket sections (7a, 8a, 7c, 8c) remain unchanged. The middle roller sections (7b and 8b), however, have become smaller in total, so that the wrap in this area for the print carrier web (6) has also become smaller. This means that there is a shorter detour in the middle of the print carrier web and therefore less tension than in the outer jacket sections. As is known, the tension in the middle of the web can be kept constant by a larger lead in the drive, so that a tension increase is generated at the web edge.

Bei umgekehrter Axialbewegung der Walzen (4, 5), bezogen auf die Richtung der Pfeile (9, 10), wird das Gegenteil bewirkt, nämlich eine Spannungserhöhung in der Mitte der Druckträgerbahn (6) gegenüber den Randzonen.If the rollers (4, 5) move in the opposite direction, in relation to the direction of the arrows (9, 10), the opposite is achieved, namely an increase in tension in the middle of the print carrier web (6) with respect to the edge zones.

Damit während der Führung der Druckträgerbahn diese seitlich nicht abdriften kann, muß der Tangens des Kegelwinkels der Walzenverjüngungen in den mittleren Mantelabschnitten (7b, 8b) stets ausreichend kleiner als der Reibungskoeffizient zwischen den Walzen (4, 5) und der Druckträgerbahn (6) sein.So that the guide of the print carrier web cannot drift laterally, the tangent of the taper angle of the tapered rollers in the middle casing sections (7b, 8b) must always be sufficiently smaller than the coefficient of friction between the rollers (4, 5) and the print carrier web (6).

Eine Optimierung des Glätteffektes der durch die Breitstreckwalzen (4, 5) laufenden Druckträgerbahn (6) kann dadurch erreicht werden, daß man einen harten Übergang von den zylindrischen Mantelabschnitten (7a, 8a und 7c, 8c) zu den konischen Mantelabschnitten (7b, 8b) vermeidet. Durch eine mathematisch bestimmte Kurvenform, z. B. nach einer Sinusfunktion, kann dieser Übergang fließend geformt werden, so daß die Walzen (4, 5) in Form ähnlich der von Flaschen entstehen.The smoothing effect of the print carrier web (6) running through the spreader rollers (4, 5) can be optimized by making a hard transition from the cylindrical jacket sections (7a, 8a and 7c, 8c) to the conical jacket sections (7b, 8b) avoids. Through a mathematically determined curve shape, e.g. B. after a sine function, this transition can be shaped fluently, so that the rollers (4, 5) in the form similar to that of bottles.

Durch Beobachten der Laufruhe der Druckträgerbahn (6) während des Betriebes kann mit dem erfindungsgemäßen Breitstreckwalzenpaar (4, 5) ein Spannungsoptimum für jede Papiersorte eingestellt werden, die als Druckträger verarbeitet wird.By observing the smoothness of the print media gerbahn (6) during operation, with the spreader roller pair (4, 5) according to the invention, a tension optimum can be set for each type of paper that is processed as a print carrier.

Mit der erfindungsgemäßen Breitstreckwalzenanordnung können somit Einflüsse, wie unterschiedliche Papierstärken oder materialbedingte Elastizitätsmodulschwankungen, in ihrer Auswirkung über die Druckträgerbahnbreite eliminiert werden. Insbesondere kann die unterschiedliche Dehnung zwischen Druckträgerbahnmitte und deren Randzone mit den erfindungsgemäßen Breitstreckwalzen (4, 5) eliminiert werden. Dadurch wird auch vermieden, daß die Bahn zu flattern anfängt oder zur Faltenbildung neigt. Es versteht sich, daß das erfindungsgemäße Breitstreckwalzenpaar (4, 5) beliebig oft in Rotationsdruckmaschinen, beispielsweise zwischen dem ersten Druckwerk und dem Einzugswerk und zwischen einzelnen Druckwerken oder im Falzaufbau, angeordnet werden kann.With the spreader roller arrangement according to the invention, influences such as different paper thicknesses or material-related fluctuations in elastic modulus can thus be eliminated in their effect over the width of the printing medium web. In particular, the different stretching between the center of the print carrier web and its edge zone can be eliminated with the spreader rollers (4, 5) according to the invention. This also prevents the web from fluttering or tending to wrinkle. It goes without saying that the spreader roller pair (4, 5) according to the invention can be arranged as often as desired in rotary printing presses, for example between the first printing unit and the feed unit and between individual printing units or in the folding structure.

Claims (1)

  1. Lateral expansion device with lateral expansion rollers having several roller sections for moving material webs, especially for printed material webs, characterised in that transversely to the direction of movement of the material web (6), spaced from each other, there is arranged a pair of rollers (4, 5) around which the material web (6) is wrapped in an S-shape, the roller casings (7, 8) of these rollers each have at least three casing sections (7a, b, c, 8a, b, c) the outer cylindrical casing sections (7a, c) of which with a large and a small diameter (D1, D3) of one roller (4) are opposite the outer cylindrical casing sections (8a, c) with a small and a large diameter (d1, d3) of the other roller (5), and the above-mentioned casing sections (7a, 7c, 8a, 8c) are each joined by a continuously extending casing section (7b, 8b), these being so constructed that in the neutral position the sums of the opposite circumferences are the same size at each point of the pair of rollers (Fig. 1) and in that at least one roller (e. g. 5) can be moved axially and parallel to the other roller (e. g. 4).
EP86114332A 1985-12-20 1986-10-16 Lateral-expansion device Expired EP0225988B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3545270 1985-12-20
DE3545270A DE3545270C1 (en) 1985-12-20 1985-12-20 Spreader

Publications (2)

Publication Number Publication Date
EP0225988A1 EP0225988A1 (en) 1987-06-24
EP0225988B1 true EP0225988B1 (en) 1989-02-22

Family

ID=6289060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114332A Expired EP0225988B1 (en) 1985-12-20 1986-10-16 Lateral-expansion device

Country Status (4)

Country Link
US (1) US4748909A (en)
EP (1) EP0225988B1 (en)
JP (1) JPS62161661A (en)
DE (2) DE3545270C1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0737132B2 (en) * 1990-06-30 1995-04-26 株式会社東京機械製作所 Guide roller device for rotary press
US5891008A (en) * 1995-12-15 1999-04-06 The Procter & Gamble Company Sheet products for use in a pop-up dispenser and method for forming from stretched ribbons
US5642835A (en) * 1995-12-15 1997-07-01 The Procter & Gamble Company Sheet products for use in a pop-up dispenser and method for forming
FI105804B (en) 1997-01-30 2000-10-13 Valmet Corp Removal roller, width stretch roller or equivalent for web material
US20040154146A1 (en) * 2001-05-17 2004-08-12 Pruitt Paul R. Web spreader roll and methods for spreading webs of material
DE10335758C5 (en) * 2003-08-05 2015-12-03 Manroland Web Systems Gmbh Method and printing unit for influencing the lateral web spread, in particular on rotary printing presses
DE102005048246B4 (en) * 2005-10-07 2009-09-10 Maschinenfabrik Wifag Rotary printing machine with elongation compensator and method for printing a longitudinally cut web
US7538680B2 (en) * 2006-04-28 2009-05-26 Checkpoint Systems, Inc. Alarm systems, wireless alarm devices, and article security methods

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE196742C (en) *
US813288A (en) * 1905-07-03 1906-02-20 Thomas Hancock Felt-regulating device for paper-machines.
US920122A (en) * 1907-05-03 1909-05-04 Frank Farnworth Apparatus for stretching textile fabrics.
AT55619B (en) * 1911-01-02 1912-09-25 Alfred Meister Tissue stretching machine.
GB785680A (en) * 1955-02-01 1957-10-30 United States Steel Corp Improvements in and relating to self-centering or aligning rollers
GB939351A (en) * 1961-01-12 1963-10-16 Ici Ltd Improvements in web feed rollers
DE2139159C3 (en) * 1971-08-05 1974-08-15 Jagenberg-Werke Ag, 4000 Duesseldorf Device for spreading webs of material, in particular webs of paper
CH612478A5 (en) * 1976-04-30 1979-07-31 Armand Demiere
IT1083519B (en) * 1977-06-15 1985-05-21 Bassani Mariano ROPE FABRIC OPENING SYSTEM
DE3003403A1 (en) * 1980-01-31 1981-08-06 Ramisch Kleinewefers Gmbh, 4150 Krefeld Stretching thermoplastic film - using roller with longitudinal grooves containing conducting plastics threads fixed to skewed end discs
JPS59167442A (en) * 1983-03-11 1984-09-20 Toyo Kikai Kk Spreading and guiding device of running cloth
US4693587A (en) * 1984-07-16 1987-09-15 Canon Kabushiki Kaisha Image forming apparatus

Also Published As

Publication number Publication date
DE3662135D1 (en) 1989-03-30
EP0225988A1 (en) 1987-06-24
JPS62161661A (en) 1987-07-17
DE3545270C1 (en) 1987-04-23
US4748909A (en) 1988-06-07

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