EP1325808B1 - Transport structure - Google Patents

Transport structure Download PDF

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Publication number
EP1325808B1
EP1325808B1 EP02027009A EP02027009A EP1325808B1 EP 1325808 B1 EP1325808 B1 EP 1325808B1 EP 02027009 A EP02027009 A EP 02027009A EP 02027009 A EP02027009 A EP 02027009A EP 1325808 B1 EP1325808 B1 EP 1325808B1
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EP
European Patent Office
Prior art keywords
roller
nominal
web
draw
conveyor unit
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.)
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Application number
EP02027009A
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German (de)
French (fr)
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EP1325808A2 (en
EP1325808A3 (en
Inventor
Karl Waldeck
Ulli Bösl
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.)
BHS Corrugated Maschinen und Anlagenbau GmbH
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BHS Corrugated Maschinen und Anlagenbau GmbH
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Publication of EP1325808A2 publication Critical patent/EP1325808A2/en
Publication of EP1325808A3 publication Critical patent/EP1325808A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2845—Details, e.g. provisions for drying, moistening, pressing
    • B31F1/2863—Corrugating cylinders; Supporting or positioning means therefor; Drives therefor
    • B31F1/2868—Exchangeable corrugating cylinders

Definitions

  • the invention relates to a transport unit for transporting a material web, in particular for transporting a corrugated web in a corrugated board plant.
  • the invention has for its object to provide a transport unit for webs, which transports the web with the least possible wear.
  • the object is solved by the features of claim 1.
  • the essence of the invention is to provide in the transport unit, a lower transport roller, which is constantly driven by a drive. Furthermore, a tension roller with a high coefficient of friction is provided, which is connected to the transport roller via a torque transmission device coupled with a freewheel. The transmission ratio of the torque-transmitting device is selected such that the freewheel engages when the speed of the corrugated web and thus the rotational speed of the tension roller falls below a predetermined value.
  • the corrugated board 1 partially shown in Fig. 1 will be described below in the transport direction 2.
  • a corrugated web 3 is fed by means of a heating and traction device 4.
  • the heating and traction device 4 has an endless drivable Andschreibgurt 5, which defines together with a table 6 a gap 7, in which the corrugated web 3 is compressed.
  • Behind the heating and traction device 4, a cross cutter 8 is provided for the transverse sectioning of the corrugated web 3.
  • a slitting and creasing device 9 Downstream of the cross cutter 8 a slitting and creasing device 9 is provided.
  • the longitudinal cutting and creasing device 9 grooves and longitudinal cuts, including a marginal edge cut, are made in the corrugated web 3.
  • a transport unit 10 described in more detail below is provided, in which the corrugated web 3, when its actual speed v B (actual) falls below a desired speed v B (setpoint), is transported especially.
  • a switch 11 is provided, are divided by the various parts of the corrugated web 3 via two tables 12 and then fed to a double cross cutter 13, in which the corrugated strips are divided into individual sections.
  • the transport unit 10 is understood in the broadest sense to mean a unit which transports a material web, if necessary also material web sections. It can also be transported several webs side by side. When transport units are understood, for example, even in corrugated plants Schneider-Riller machines.
  • the transport unit 10 has a machine frame 14 with lateral vertical support walls 15 and 16, which run parallel to each other. Between the support walls 15 and 16, a horizontally arranged and perpendicular to the transport direction 2 extending transport roller 17 is arranged, which has two end projecting shaft journals 18, 19 which are rotatable in bearings 20, 21 in the support walls 15 and 16 about a rotation axis 22 are stored.
  • the transport roller 17 is formed as a hollow roller with a roller shell 23, at the ends of the shaft pin 18, 19 are attached.
  • the roller shell 23 is made of metal, in particular steel.
  • the static friction coefficient ⁇ between the surface of the transport roller 17 and a paper web is approximately 0.05 ⁇ ⁇ ⁇ 0.25, in particular ⁇ ⁇ 0.15.
  • a tension roller 24 is rotatably mounted in bearings 25, 26 about a rotation axis 27.
  • the bearings 25 and 26 are attached via support arms 28 to the support walls 15 and 16, respectively.
  • the tension roller 24 has a shaft 29 extending from the bearing 25 to the bearing 26, on which axially spaced numerous rollers 30 are attached.
  • the rollers 30 are made of plastic, in particular rubber, and have a cylindrical surface 31.
  • the pull roll surface friction coefficient is selected to assure force transfer from the roll 30 and thus the pull roll 24 to the corrugated web 3. The tension roller surface friction coefficient is thus greater, in particular considerably larger than the transport roller surface friction coefficient.
  • the static friction coefficient ⁇ between the surface of the tension roller 24 and a paper material web is approximately 0.6 .mu.m.ltoreq.0.8, in particular .mu. ⁇ 0.7.
  • a transport gap 32 is formed through which the corrugated web 3 is guided on the transport roller 17 and the tension roller 24 respectively fitting.
  • the rollers 30 have evenly distributed, substantially radially outwardly extending, closed in the radial direction slats 33. However, massive rollers 30 without fins 33 can also be used.
  • the axes of rotation 22 and 27 are parallel to each other.
  • a drive motor 34 is fixed, which is connected via a belt drive 35 with a pulley 36 in a torque-transmitting manner.
  • the pulley 36 is connected to the shaft journal 18th connected.
  • a gear 37 is mounted on the shaft journal 18.
  • the transport roller 17, the pulley 36 and the gear 37 are rotatable about the common axis of rotation 22.
  • a drive shaft 40 rotatable about a rotation axis 39 is mounted in the support wall 15 with a bearing 38.
  • the drive shaft 40 has at its left in Fig. 2 end a connected to the drive shaft 40 gear 41 which is in engagement with the gear 37.
  • the drive shaft 40 is connected to a propeller shaft 42, which in turn is connected at its other end to the shaft 29.
  • a freewheel 43 is arranged between the gear 41 and the drive shaft 40.
  • the freewheel 43 is a commercially available freewheel, which allows rotation of the gear 41 relative to the drive shaft 40 in one direction and blocked in the other direction.
  • the axes 39 and 27 are parallel and offset from each other.
  • the operation of the transport unit 10 will be described below.
  • v B target speed
  • the corrugated web is here primarily by units that are downstream of the transport unit 10, pulled and optionally accelerated.
  • the transport roller 17 is driven by the drive motor 34, the belt drive 35 and the pulley 36 so that it has a tangential rotational speed v T in the region of the transport gap 32 and an associated angular velocity ⁇ T.
  • the transport roller 17 is driven in advance, ie the tangential rotational speed v T is greater than the desired speed v B (target) of the corrugated web 3.
  • the draw roller 24 has a tangential Circumferential speed v z (setpoint) and an associated angular velocity ⁇ Z (setpoint), where v Z (setpoint) ⁇ v B (setpoint), ie the rollers 30 run on the corrugated web 3 with substantially no slip.
  • the angular velocity of the drive shaft 40 is thus also ⁇ Z (nominal).
  • the gear 41 is driven constantly, wherein the gear ratio is selected such that in the event that the corrugated web 3 at the speed v B (target) is transported and thus the drive shaft 40, the angular velocity ⁇ Z (Soll ), no torque is transmitted from the gear 41 to the drive shaft 40; the freewheel 43 thus allows a free relative rotation.
  • This has the advantage that in a trouble-free transport of the corrugated web 3 with the desired speed v B (target), the rollers 30 are not driven and thus the wear of the rollers 30 is much lower compared to the situation in which Rollers 30 are always driven.
  • the gear ratio of the gears 37 and 41 is selected such that, in the event that the ratio a of the actual velocity v B (actual) to the target Speed v B (setpoint) falls below a predetermined value a LIM and correspondingly the angular speed of the drive shaft 40 falls below a certain value, the freewheel 43 engages and the shaft 29 is driven by the drive motor 34.
  • a LIM a LIM ⁇ 1, a LIM ⁇ 0.99, especially a LIM ⁇ 0.98. It is important that a LIM outside the usual range of transport speeds v B (target) is in trouble-free state.
  • the transport unit 10 Particularly advantageous on the transport unit 10 is that no electronic control is required.
  • the tension roller 24 In the trouble-free state, the tension roller 24 is not driven, so that their wear is relatively low. Is that sinking? Speed of the corrugated web 3 below a predetermined limit, so is the freewheel 43, a torque from the drive motor 34 is applied to the tension roller 24 so that it continues to promote the corrugated web 3 at least at the predetermined limit speed.
  • This is z. B. in a format change in the corrugated board 1 of importance.
  • the corrugated web 3 is severed with the cross cutter 8. The portion of the corrugated web 3 in front of the cross cutter 8 is accelerated to create a gap for the slitter and scorer 9.
  • the gap is required for the cutting tools to be repositioned in the device 9. If the gap is too small, because the corrugated web section was not removed quickly enough, the repositioning of the tools must be stopped, creating a jam.
  • the corresponding removal of the corrugated web section is accomplished by the transport unit 10, which pulls the corrugated web section from the device 9. It is also possible to provide the transport unit in front of the device 9, as indicated by the reference numeral 10 '.

Abstract

The corrugated paper feed has a frame (14) with a rotary feed roller (17) connected to a drive (34) and a traction roller (24) also mounted in the frame parallel to the first. There is a web feed gap (32) defined between the feed and traction rollers. The friction al coefficient of the feed roller surface is less than that of the traction roller. A rotary transmission connects the feed and traction rollers.

Description

Die Erfindung betrifft eine Transport-Einheit zum Transport einer Materialbahn, insbesondere zum Transport einer Wellpappe-Bahn in einer Wellpappe-Anlage.The invention relates to a transport unit for transporting a material web, in particular for transporting a corrugated web in a corrugated board plant.

Eine solche Anlage ist z.B. bekannt aus der US-A-5,511,712 .Such a system is known, for example from the US-A-5,511,712 ,

In einer Wellpappe-Anlage ist der Transport einer Wellpappe-Bahn mit einer vorbestimmten Geschwindigkeit sowie die Beschleunigung der Wellpappe-Bahn auf eine bestimmte Geschwindigkeit von zentraler Bedeutung, um sicherzustellen, dass Bearbeitungseinrichtungen einen vorgegebenen Abschnitt der Wellpappe-Bahn zum richtigen Zeitpunkt erhalten. Bei einem Formatwechsel in der Längsschneide- und Rill-Einrichtung müssen einzelne Wellpappe-Bahn-Abschnitte beschleunigt werden, um eine ausreichend große Lücke zu erzeugen, innerhalb derer eine neue Positionierung der Schneidwerkzeuge möglich ist. Für den Abtransport eines Wellpappe-Bahn-Abschnitts mit einer vorbestimmten Geschwindigkeit sind Transport-Einheiten bekannt, die aus einem angetriebenen Walzenpaar bestehen, zwischen denen die Wellpappe-Bahn hindurchgeführt ist. Durch den ständigen Antrieb beider Walzen entsteht ein vergleichsweise hoher Verschleiß.In a corrugating machine, the transport of a corrugated web at a predetermined speed and the acceleration of the corrugated web to a certain speed are of central importance to ensure that processing means receive a given portion of the corrugated web at the right time. In a format change in the slitting and scoring device individual corrugated web sections must be accelerated to create a sufficiently large gap within which a new positioning of the cutting tools is possible. For the removal of a corrugated web section at a predetermined speed transport units are known which consist of a driven pair of rollers, between which the corrugated web is passed. The constant drive of both rollers results in a comparatively high level of wear.

Der Erfindung liegt die Aufgabe zugrunde, eine Transport-Einheit für Materialbahnen zu schaffen, die bei möglichst geringem Verschleiß die Materialbahn transportiert.The invention has for its object to provide a transport unit for webs, which transports the web with the least possible wear.

Die Aufgabe wird durch die Merkmale des Anspruches 1 gelöst. Der Kern der Erfindung besteht darin, in der Transport-Einheit eine untere Transportwalze vorzusehen, die über einen Antrieb konstant angetrieben wird. Des weiteren ist eine Zugwalze mit einem hohen Reibwert vorgesehen, die mit der Transportwalze über eine Drehmomentübertragungs-Einrichtung mit einem Freilauf gekoppelt ist. Das Übersetzungsverhältnis der Drehmomentübertragungs-Einrichtung ist derart gewählt, dass der Freilauf eingreift, wenn die Geschwindigkeit der Wellpappe-Bahn und damit die Umlaufgeschwindigkeit der Zugwalze unter einen vorbestimmten Wert fällt.The object is solved by the features of claim 1. The essence of the invention is to provide in the transport unit, a lower transport roller, which is constantly driven by a drive. Furthermore, a tension roller with a high coefficient of friction is provided, which is connected to the transport roller via a torque transmission device coupled with a freewheel. The transmission ratio of the torque-transmitting device is selected such that the freewheel engages when the speed of the corrugated web and thus the rotational speed of the tension roller falls below a predetermined value.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Further advantageous embodiments of the invention will become apparent from the dependent claims.

Zusätzliche Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles anhand der Zeichnung. Es zeigen:

Fig. 1
eine schematische Darstellung einer Wellpappe-Anlage mit einer Transport-Einheit,
Fig. 2
einen Schnitt der Transport-Einheit gemäß der Schnittlinie II-II in Fig.1,
Fig. 3
eine Draufsicht gemäß dem Sichtpfeil III in Fig. 2 und
Fig. 4
eine Schnittdarstellung gemäß der Schnittlinie IV-IV in Fig. 2.
Additional features and details of the invention will become apparent from the following description of an embodiment with reference to the drawing. Show it:
Fig. 1
a schematic representation of a corrugated board plant with a transport unit,
Fig. 2
a section of the transport unit according to the section line II-II in Figure 1,
Fig. 3
a plan view according to the viewing arrow III in Fig. 2 and
Fig. 4
a sectional view along the section line IV-IV in Fig. 2nd

Die in Fig. 1 teilweise dargestellte Wellpappe-Anlage 1 wird nachfolgend in Transport-Richtung 2 beschrieben. Eine Wellpappe-Bahn 3 wird mittels einer Heiz- und Zugvorrichtung 4 zugeführt. Die Heiz- und Zugvorrichtung 4 weist einen endlosen, antreibbaren Andrückgurt 5 auf, der zusammen mit einem Tisch 6 einen Spalt 7 definiert, in dem die Wellpappe-Bahn 3 zusammengedrückt wird. Hinter der Heiz- und Zugvorrichtung 4 ist ein Querschneider 8 zur Querdurchtrennung der Wellpappe-Bahn 3 vorgesehen.The corrugated board 1 partially shown in Fig. 1 will be described below in the transport direction 2. A corrugated web 3 is fed by means of a heating and traction device 4. The heating and traction device 4 has an endless drivable Andrückgurt 5, which defines together with a table 6 a gap 7, in which the corrugated web 3 is compressed. Behind the heating and traction device 4, a cross cutter 8 is provided for the transverse sectioning of the corrugated web 3.

Dem Querschneider 8 nachgeordnet ist eine Längsschneide- und Rill-Einrichtung 9 vorgesehen. In der Längsschneide- und Rill-Einrichtung 9 werden Rillungen und Längsschnitte einschließlich eines Randstreifen-Beschnitts in die Wellpappe-Bahn 3 eingebracht. Hinter der Längsschneide- und Rill-Einrichtung 9 ist eine nachfolgend näher beschriebene Transport-Einheit 10 vorgesehen, in der die Wellpappe-Bahn 3, wenn ihre Ist-Geschwindigkeit vB(Ist) unter eine Soll-Geschwindigkeit vB(Soll) fällt, besonders transportiert wird. Hinter der Transport-Einheit 10 ist eine Weiche 11 vorgesehen, durch die verschiedene Teile der Wellpappe-Bahn 3 über zwei Tische 12 aufgeteilt und anschließend einem Doppel-Querschneider 13 zugeführt werden, in dem die Wellpappe-Streifen in einzelne Abschnitte zerteilt werden. Unter der Transport-Einheit 10 wird im weitesten Sinne eine Einheit verstanden, die eine Materialbahn, ggf, auch Materialbahn-Abschnitte, transportiert. Es können auch mehrere Materialbahnen nebeneinander transportiert werden. Als Transport-Einheiten werden beispielsweise auch bei Wellpappe-Anlagen Schneider-Riller-Automaten verstanden.Downstream of the cross cutter 8 a slitting and creasing device 9 is provided. In the longitudinal cutting and creasing device 9, grooves and longitudinal cuts, including a marginal edge cut, are made in the corrugated web 3. Behind the longitudinal cutting and creasing device 9, a transport unit 10 described in more detail below is provided, in which the corrugated web 3, when its actual speed v B (actual) falls below a desired speed v B (setpoint), is transported especially. Behind the transport unit 10, a switch 11 is provided, are divided by the various parts of the corrugated web 3 via two tables 12 and then fed to a double cross cutter 13, in which the corrugated strips are divided into individual sections. The transport unit 10 is understood in the broadest sense to mean a unit which transports a material web, if necessary also material web sections. It can also be transported several webs side by side. When transport units are understood, for example, even in corrugated plants Schneider-Riller machines.

Im folgenden wird unter Bezugnahme auf die Fig. 2 bis 4 der genauere Aufbau der Transport-Einheit 10 beschrieben. Die Transport-Einheit 10 weist ein Maschinengestell 14 mit seitlichen vertikalen Stützwänden 15 und 16 auf, die parallel zueinander verlaufen. Zwischen den Stützwänden 15 und 16 ist eine horizontal angeordnete und senkrecht zur Transport-Richtung 2 verlaufende Transportwalze 17 angeordnet, die zwei endseitig vorstehende Wellenzapfen 18, 19 aufweist, die in Lagern 20, 21 in den Stützwänden 15 bzw. 16 um eine Drehachse 22 drehbar gelagert sind. Die Transportwalze 17 ist als Hohlwalze mit einem Walzen-Mantel 23 ausgebildet, an dem endseitig die Wellen-Zapfen 18, 19 befestigt sind. Der Walzen-Mantel 23 besteht aus Metall, insbesondere aus Stahl. Die Haftreibungszahl µ zwischen der Oberfläche der Transport-Walze 17 und einer Papier-Materialbahn liegt ungefähr bei 0,05 ≤ µ ≤ 0,25, insbesondere µ ≈ 0,15.In the following, with reference to Figs. 2 to 4, the more detailed structure of the transport unit 10 will be described. The transport unit 10 has a machine frame 14 with lateral vertical support walls 15 and 16, which run parallel to each other. Between the support walls 15 and 16, a horizontally arranged and perpendicular to the transport direction 2 extending transport roller 17 is arranged, which has two end projecting shaft journals 18, 19 which are rotatable in bearings 20, 21 in the support walls 15 and 16 about a rotation axis 22 are stored. The transport roller 17 is formed as a hollow roller with a roller shell 23, at the ends of the shaft pin 18, 19 are attached. The roller shell 23 is made of metal, in particular steel. The static friction coefficient μ between the surface of the transport roller 17 and a paper web is approximately 0.05 ≦ μ ≦ 0.25, in particular μ ≈ 0.15.

Oberhalb der Transportwalze 17 ist eine Zugwalze 24 in Lagern 25, 26 um eine Drehachse 27 drehbar gelagert. Die Lager 25 und 26 sind über Tragarme 28 an den Stützwänden 15 bzw. 16 befestigt. Die Zugwalze 24 weist eine sich vom Lager 25 zum Lager 26 erstreckende Welle 29 auf, auf der axial voneinander beabstandet zahlreiche Rollen 30 befestigt sind. Die Rollen 30 bestehen aus Kunststoff, insbesondere aus Gummi, und weisen eine zylindrische Oberfläche 31 auf. Der Zugwalzen-Oberflächen-Reibwert ist so gewählt, dass eine Kraftübertragung von der Rolle 30 und damit der Zugwalze 24 auf die Wellpappe-Bahn 3 sichergestellt ist. Der Zugwalzen-Oberflächen-Reibwert ist somit größer, insbesondere erheblich größer als der Transportwalzen-Oberflächen-Reibwert. Die Haftreibungszahl µ zwischen der Oberfläche der Zugwalze 24 und einer Papier-Materialbahn liegt ungefähr bei 0,6≤ µ ≤ 0,8, insbesondere µ ≈ 0,7. Zwischen der Zugwalze 24 und der Transportwalze 17 ist ein Transportspalt 32 gebildet, durch den die Wellpappe-Bahn 3 an der Transportwalze 17 und der Zugwalze 24 jeweils anliegend geführt ist. Die Rollen 30 weisen gleichmäßig verteilte, sich im wesentlichen radial nach außen erstreckende, in radialer Richtung geschlossene Lamellen 33 auf. Es können jedoch auch massive Rollen 30 ohne Lamellen 33 verwendet werden. Die Drehachsen 22 und 27 verlaufen parallel zueinander.Above the transport roller 17, a tension roller 24 is rotatably mounted in bearings 25, 26 about a rotation axis 27. The bearings 25 and 26 are attached via support arms 28 to the support walls 15 and 16, respectively. The tension roller 24 has a shaft 29 extending from the bearing 25 to the bearing 26, on which axially spaced numerous rollers 30 are attached. The rollers 30 are made of plastic, in particular rubber, and have a cylindrical surface 31. The pull roll surface friction coefficient is selected to assure force transfer from the roll 30 and thus the pull roll 24 to the corrugated web 3. The tension roller surface friction coefficient is thus greater, in particular considerably larger than the transport roller surface friction coefficient. The static friction coefficient μ between the surface of the tension roller 24 and a paper material web is approximately 0.6 .mu.m.ltoreq.0.8, in particular .mu.≈0.7. Between the tension roller 24 and the transport roller 17, a transport gap 32 is formed through which the corrugated web 3 is guided on the transport roller 17 and the tension roller 24 respectively fitting. The rollers 30 have evenly distributed, substantially radially outwardly extending, closed in the radial direction slats 33. However, massive rollers 30 without fins 33 can also be used. The axes of rotation 22 and 27 are parallel to each other.

An der Stützwand 15 ist ein Antriebsmotor 34 befestigt, der über einen Riemenantrieb 35 mit einer Riemenscheibe 36 in drehmomentübertragender Weise verbunden ist. Die Riemenscheibe 36 ist mit dem Wellenzapfen 18 verbunden. Benachbart zu der Riemenscheibe 36 ist auf dem Wellenzapfen 18 ein Zahnrad 37 befestigt. Die Transportwalze 17, die Riemenscheibe 36 und das Zahnrad 37 sind um die gemeinsame Drehachse 22 drehbar. Oberhalb des Zahnrades 37 ist in der Stützwand 15 mit einem Lager 38 ein um eine Drehachse 39 drehbare Antriebswelle 40 gelagert. Die Antriebswelle 40 weist an ihrem in Fig. 2 linken Ende ein mit der Antriebswelle 40 verbundenes Zahnrad 41 auf, das mit dem Zahnrad 37 in Eingriff ist. An ihrem entgegensetzten Ende ist die Antriebswelle 40 mit einer Gelenkwelle 42 verbunden, die ihrerseits an ihrem anderen Ende mit der Welle 29 verbunden ist. Zwischen dem Zahnrad 41 und der Antriebswelle 40 ist ein Freilauf 43 angeordnet. Bei dem Freilauf 43 handelt es sich um einen handelsüblichen Freilauf, der eine Drehung des Zahnrades 41 relativ zur Antriebswelle 40 in eine Richtung zuläßt und in die andere Richtung blockiert. Die Achsen 39 und 27 verlaufen parallel und versetzt zueinander.On the support wall 15, a drive motor 34 is fixed, which is connected via a belt drive 35 with a pulley 36 in a torque-transmitting manner. The pulley 36 is connected to the shaft journal 18th connected. Adjacent to the pulley 36, a gear 37 is mounted on the shaft journal 18. The transport roller 17, the pulley 36 and the gear 37 are rotatable about the common axis of rotation 22. Above the gear 37, a drive shaft 40 rotatable about a rotation axis 39 is mounted in the support wall 15 with a bearing 38. The drive shaft 40 has at its left in Fig. 2 end a connected to the drive shaft 40 gear 41 which is in engagement with the gear 37. At its opposite end, the drive shaft 40 is connected to a propeller shaft 42, which in turn is connected at its other end to the shaft 29. Between the gear 41 and the drive shaft 40, a freewheel 43 is arranged. The freewheel 43 is a commercially available freewheel, which allows rotation of the gear 41 relative to the drive shaft 40 in one direction and blocked in the other direction. The axes 39 and 27 are parallel and offset from each other.

Im folgenden wird die Funktionsweise der Transport-Einheit 10 beschrieben. Beim störungsfreien Transport der Wellpappe-Bahn 3 weist diese in der Transport-Einheit 10 eine Soll-Geschwindigkeit vB(Soll) auf. Die Wellpappe-Bahn wird hierbei primär durch Einheiten, die der Transport-Einheit 10 nachgeordnet sind, gezogen und gegebenenfalls beschleunigt. Die Transport-Walze 17 wird durch den Antriebsmotor 34, den Riemenantrieb 35 sowie die Riemenscheibe 36 angetrieben, so dass diese eine tangentiale Umlaufgeschwindigkeit vT im Bereich des Transportspaltes 32 und eine zugehörige Winkelgeschwindigkeit ωT aufweist. Die Transportwalze 17 wird voreilend angetrieben, d. h. die tangentiale Umlaufgeschwindigkeit vT ist größer als die Soll-Geschwindigkeit vB(Soll) der Wellpappe-Bahn 3. Insbesondere gilt: vT/vB(Soll)>1, insbesondere vT/vB(Soll)≥1,01 und besonders vorteilhaft vT/vB(Soll)≥1,04. Die Zugwalze 24 weist eine tangentiale Umlaufgeschwindigkeit vz(Soll) und eine zugehörige Winkelgeschwindigkeit ωZ(Soll) auf, wobei vZ(Soll)≈vB(Soll), d. h. die Rollen 30 laufen auf der Wellpappe-Bahn 3 im wesentlichen schlupffrei mit. Die Winkelgeschwindigkeit der Antriebswelle 40 beträgt somit ebenfalls ωZ(Soll). Durch das Zahnrad 37 wird das Zahnrad 41 konstant angetrieben, wobei das Übersetzungsverhältnis derart gewählt ist, dass für den Fall, dass die Wellpappe-Bahn 3 mit der Geschwindigkeit vB(Soll) transportiert wird und somit die Antriebswelle 40 die Winkelgeschwindigkeit ωZ(Soll) besitzt, kein Drehmoment von dem Zahnrad 41 auf die Antriebswelle 40 übertragen wird; der Freilauf 43 läßt also eine freie Relativdrehung zu. Dies hat den Vorteil, dass bei einem störungsfreien Transport der Wellpappe-Bahn 3 mit der gewünschten Geschwindigkeit vB(Soll) die Rollen 30 nicht angetrieben sind und somit auch der Verschleiß der Rollen 30 sehr viel geringer ist im Vergleich zu der Situation, bei der Rollen 30 immer angetrieben sind.The operation of the transport unit 10 will be described below. During trouble-free transport of the corrugated web 3, this has in the transport unit 10 to a target speed v B (target). The corrugated web is here primarily by units that are downstream of the transport unit 10, pulled and optionally accelerated. The transport roller 17 is driven by the drive motor 34, the belt drive 35 and the pulley 36 so that it has a tangential rotational speed v T in the region of the transport gap 32 and an associated angular velocity ω T. The transport roller 17 is driven in advance, ie the tangential rotational speed v T is greater than the desired speed v B (target) of the corrugated web 3. In particular: v T / v B (target)> 1, in particular v T / v B (setpoint) ≥1.01, and particularly advantageously v T / v B (setpoint) ≥1.04. The draw roller 24 has a tangential Circumferential speed v z (setpoint) and an associated angular velocity ω Z (setpoint), where v Z (setpoint) ≈v B (setpoint), ie the rollers 30 run on the corrugated web 3 with substantially no slip. The angular velocity of the drive shaft 40 is thus also ω Z (nominal). By the gear 37, the gear 41 is driven constantly, wherein the gear ratio is selected such that in the event that the corrugated web 3 at the speed v B (target) is transported and thus the drive shaft 40, the angular velocity ω Z (Soll ), no torque is transmitted from the gear 41 to the drive shaft 40; the freewheel 43 thus allows a free relative rotation. This has the advantage that in a trouble-free transport of the corrugated web 3 with the desired speed v B (target), the rollers 30 are not driven and thus the wear of the rollers 30 is much lower compared to the situation in which Rollers 30 are always driven.

Kommt es z. B. im Zusammenhang mit einem Formatwechsel in der Längsschneide- und Rill-Einrichtung 9 zu einem Abfall der Geschwindigkeit der Wellpappe-Bahn 3 in der Transport-Einheit 10 und somit zu einer Störung, so stellt sich eine Ist-Geschwindigkeit vB(Ist) der Wellpappe-Bahn 3 ein, die geringer ist als die Soll-Geschwindigkeit vB(Soll). Die fest mit dem Antriebsmotor 34 verbundene Transportwalze 17 läuft weiterhin mit Schlupf mit einer tangentialen Umlaufgeschwindigkeit vT, die größer ist als die Soll-Geschwindigkeit vB(Soll) der Wellpappe-Bahn 3. Die auf der Wellpappe-Bahn 3 aufliegende Zugwalze 24 verlangsamt sich jedoch, so dass sich eine neue tangentiale Umlaufgeschwindigkeit vZ(Ist) mit einer zugehörigen Winkelgeschwindigkeit ωZ(Ist) einstellt, für die gilt: vZ(Ist)≈vB(Ist)<vB(Soll). Durch das Zahnrad 37 wird das Zahnrad 41 mit einer von der Geschwindigkeit der Wellpappe-Bahn 3 unabhängigen Geschwindigkeit angetrieben. Durch die Reduktion der Geschwindigkeit der Wellpappe-Bahn 3 reduziert sich die Winkelgeschwindigkeit der Antriebswelle 40. Das Übersetzungsverhältnis der Zahnräder 37 und 41 ist derart gewählt, dass für den Fall, dass das Verhältnis a der Ist-Geschwindigkeit vB(Ist) zur Soll-Geschwindigkeit vB(Soll) einen vorbestimmten Wert aLIM unterschreitet und entsprechend die Winkelgeschwindigkeit der Antriebswelle 40 einen bestimmten Wert unterschreitet, der Freilauf 43 eingreift und die Welle 29 durch den Antriebsmotor 34 angetrieben wird. Für aLIM gilt: aLIM <1, aLIM ≤0,99, besonders vorteilhaft aLIM ≈0,98. Wichtig ist, dass aLIM außerhalb der üblichen Schwankungsbreite der Transportgeschwindigkeiten vB(Soll) im störungsfreien Zustand liegt. Auf diese Weise soll verhindert werden, dass bei normalen Schwankungen der Transportgeschwindigkeit der Wellpappe-Bahn 3 ständig der Freilauf 43 zugeschaltet und die Welle 29 angetrieben wird. Abgesehen von Verschleißerscheinungen würde dies zu einem Aufschaukeln des Systems führen. Liegen die Schwankungen der Geschwindigkeit der Wellpappe-Bahn 3 im störungsfreien Zustand bei ungefähr 1 %, so ist es sinnvoll, dass der Antrieb der Zugwalze 24 bei einem Unterschreiten der Geschwindigkeit der Wellpappe-Bahn 3 um mehr als 2 %, entsprechend einem Faktor aLIM =0,98, zugeschaltet wird. Sind die Schwankungen der Geschwindigkeit der Wellpappe-Bahn 3 im störungsfreien Zustand geringer, so kann auch aLIM näher bei 1, z. B. aLIM ≈0,99, liegen. Sind die Schwankungen größer, so muß auch aLIM entsprechend weiter von 1 entfernt liegen.Does it come z. B. in connection with a format change in the longitudinal cutting and creasing device 9 to a drop in the speed of the corrugated web 3 in the transport unit 10 and thus to a fault, so there is an actual speed v B (actual) the corrugated web 3, which is less than the desired speed v B (desired). The fixed to the drive motor 34 transport roller 17 continues to run with slip at a tangential rotational speed v T , which is greater than the desired speed v B (target) of the corrugated web 3. The resting on the corrugated web 3 train roller 24 slows down however, such that a new tangential orbital velocity v Z (actual) with an associated angular velocity ω Z (actual) is established, for which the following applies: v Z (actual) ≈v B (actual) <v B (nominal). By the gear 37, the gear 41 with driven independent of the speed of the corrugated web 3 independent speed. By reducing the speed of the corrugated web 3, the angular velocity of the drive shaft 40 is reduced. The gear ratio of the gears 37 and 41 is selected such that, in the event that the ratio a of the actual velocity v B (actual) to the target Speed v B (setpoint) falls below a predetermined value a LIM and correspondingly the angular speed of the drive shaft 40 falls below a certain value, the freewheel 43 engages and the shaft 29 is driven by the drive motor 34. For a LIM : a LIM <1, a LIM ≤ 0.99, especially a LIM ≈ 0.98. It is important that a LIM outside the usual range of transport speeds v B (target) is in trouble-free state. In this way, it is to be prevented that during normal fluctuations in the transport speed of the corrugated web 3, the freewheel 43 is always switched on and the shaft 29 is driven. Apart from wear and tear, this would lead to a build up of the system. If the fluctuations in the speed of the corrugated web 3 in the failure-free state at about 1%, it makes sense that the drive of the tension roller 24 at a speed below the speed of the corrugated web 3 by more than 2%, corresponding to a factor a LIM = 0.98, is switched on. If the fluctuations in the speed of the corrugated web 3 are lower in the fault-free state, then a LIM closer to 1, z. B. a LIM ≈ 0.99 lie. If the fluctuations are greater, a LIM must also be further away from 1.

Besonders vorteilhaft an der Transport-Einheit 10 ist, dass keine elektronische Steuerung erforderlich ist. Im störungsfreien Zustand ist die Zugwalze 24 nicht angetrieben, so dass deren Verschleiß relativ gering ist. Sinkt die Geschwindigkeit der Wellpappe-Bahn 3 unter einen vorbestimmten Grenzwert, so wird über den Freilauf 43 ein Drehmoment vom Antriebsmotor 34 auf die Zugwalze 24 gegeben, so dass diese die Wellpappe-Bahn 3 zumindest mit der vorgegebenen Grenzgeschwindigkeit weiterfördert. Dies ist z. B. bei einem Formatwechsel in der Wellpappe-Anlage 1 von Bedeutung. Für den Formatwechsel wird die Wellpappe-Bahn 3 mit dem Querschneider 8 durchtrennt. Der vor dem Querschneider 8 befindliche Abschnitt der Wellpappe-Bahn 3 wird beschleunigt, um eine Lücke für die Längsschneide- und Rill-Einrichtung 9 zu erzeugen. Die Lücke ist erforderlich, damit die Schneidwerkzeuge in der Einrichtung 9 neu positioniert werden können. Ist die Lücke zu klein, weil der Wellpappe-Bahn-Abschnitt nicht schnell genug abtransportiert wurde, so muß die Umpositionierung der Werkzeuge abgebrochen werden, wodurch ein Stau entsteht. Das entsprechende Abführen des Wellpappe-Bahn-Abschnitts wird durch die Transport-Einheit 10 bewerkstelligt, die den Wellpappe-Bahn-Abschnitt aus der Einrichtung 9 zieht. Es ist auch möglich, die Transport-Einheit vor der Einrichtung 9 vorzusehen, wie dies durch das Bezugszeichen 10' angedeutet ist.Particularly advantageous on the transport unit 10 is that no electronic control is required. In the trouble-free state, the tension roller 24 is not driven, so that their wear is relatively low. Is that sinking? Speed of the corrugated web 3 below a predetermined limit, so is the freewheel 43, a torque from the drive motor 34 is applied to the tension roller 24 so that it continues to promote the corrugated web 3 at least at the predetermined limit speed. This is z. B. in a format change in the corrugated board 1 of importance. For the format change the corrugated web 3 is severed with the cross cutter 8. The portion of the corrugated web 3 in front of the cross cutter 8 is accelerated to create a gap for the slitter and scorer 9. The gap is required for the cutting tools to be repositioned in the device 9. If the gap is too small, because the corrugated web section was not removed quickly enough, the repositioning of the tools must be stopped, creating a jam. The corresponding removal of the corrugated web section is accomplished by the transport unit 10, which pulls the corrugated web section from the device 9. It is also possible to provide the transport unit in front of the device 9, as indicated by the reference numeral 10 '.

Claims (10)

  1. A conveyor unit for conveying a web of material, in particular for conveying a web of corrugated board in a corrugating machine, comprising
    a. a machine frame (14);
    b. a delivery roller (17), which is lodged in the machine frame (14) rotatably about a first axis of rotation (22);
    c. a drive (34) for actuation of the delivery roller (17);
    d. a draw roller (24), which is lodged in the machine frame (14) rotatably about a second axis of rotation (27),
    i. the first axis of rotation (22) and the second axis of rotation (27) being substantially parallel to each other,
    ii. a nip (32) for the web of material (3) to pass through being formed between the delivery roller (17) and the draw roller (24),
    iii. the draw roller (24) having a draw-roller-surface coefficient of friction, which is selected so as to ensure power transmission from the draw roller (24) to the web of material (3) that rests thereon, and
    iv. the delivery roller (17) having a delivery-roller-surface coefficient of friction, which is less than or equal to the delivery-roller-surface coefficient of friction; and
    e. a torque transmission arrangement, which acts between the delivery roller (17) and the draw roller (24) for torque transmission from the delivery roller (17) to the draw roller (24),
    i. a free-wheel (43) being disposed between the torque-transmission arrangement and the draw roller (24).
  2. A conveyor unit according to claim 1, characterized in that the torque transmission arrangement is a gearwheel drive.
  3. A conveyor unit according to claim 2, characterized in that the gearwheel drive comprises a first gearwheel (37), which is connected with the delivery roller (17) for torque transmission, and a second gearwheel (41), which is connected with the draw roller (24) for torque transmission, the first gearwheel (37) and the second gearwheel (41) being in mesh.
  4. A conveyor unit according to claim 3, characterized in that the draw roller (24) comprises a driving shaft (40), which is connected with the draw roller (24) for torque transmission, the free-wheel (43) being disposed between the second gearwheel (41) and the driving shaft (40).
  5. A conveyor unit according to one of the preceding claims, characterized in that the draw roller (24) comprises a rotatably mounted draw-roller shaft (29) with at least one roll (30) fixed thereto.
  6. A conveyor unit according to one of the preceding claims, characterized in that, during trouble-free operation,
    a. the web of material (3) is conveyable at a pre-determined nominal velocity vB(nominal);
    b. the conveyor roller (17) is drivable at a predetermined tangential rotational speed vT and an associated angular velocity ωT; and
    c. the draw roller (24) has a tangential rotational speed vZ and an associated angular velocity ωZ so that vZ ≈ vB(nominal) applies.
  7. A conveyor unit according to claim 6, characterized in that vT/vB(nominal) > 1, in particular vT/vB(nominal) ≥ 1.01, and by special advantage vT/vB(nominal) ≈ 1.04, applies to the ratio that the tangential rotational speed vT of the delivery roller bears to the nominal velocity vB(nominal) of the web of material (3).
  8. A conveyor unit according to claim 6 or 7, characterized in that the torque transmission arrangement is such that, in case the actual velocity vB(actual) of the web of material (3) is less than the nominal velocity vB(nominal) of the web of material (3), torque is transmitted via the free-wheel (43) to the draw roller (24) if vZ/vB(nominal) < 1, in particular vZ/vB(nominal) ≤ 0.99, and by special advantage vZ/vB(nominal) ≈ 0.98, applies to the ratio of the tangential rotational speed vZ that the draw roller (24) bears to the nominal velocity vB(nominal) of the web of material.
  9. A conveyor unit according to one of the preceding claims, characterized in that at least the surface of the draw roller (24) consists of rubber.
  10. A conveyor unit according to one of the preceding claims, characterized in that at least the surface of the delivery roller (17) consists of metal, in particular of bright steel.
EP02027009A 2002-01-08 2002-12-03 Transport structure Expired - Lifetime EP1325808B1 (en)

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DE10200356A DE10200356A1 (en) 2002-01-08 2002-01-08 Transport unit
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CN101309955A (en) * 2005-11-21 2008-11-19 柯尼卡美能达精密光学株式会社 Method of treating optical film, apparatus for treating optical film, and process for producing optical film
DE102008046153A1 (en) * 2008-09-06 2010-03-11 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Automatic lubrication

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EP1325808A2 (en) 2003-07-09
EP1325808A3 (en) 2005-03-09
DE10200356A1 (en) 2003-07-17
US20030127486A1 (en) 2003-07-10
US6869003B2 (en) 2005-03-22
DE50210694D1 (en) 2007-09-27
ATE369975T1 (en) 2007-09-15

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