EP1325808A2 - Transport structure - Google Patents

Transport structure Download PDF

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Publication number
EP1325808A2
EP1325808A2 EP02027009A EP02027009A EP1325808A2 EP 1325808 A2 EP1325808 A2 EP 1325808A2 EP 02027009 A EP02027009 A EP 02027009A EP 02027009 A EP02027009 A EP 02027009A EP 1325808 A2 EP1325808 A2 EP 1325808A2
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EP
European Patent Office
Prior art keywords
roller
transport
target
speed
transport 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.)
Granted
Application number
EP02027009A
Other languages
German (de)
French (fr)
Other versions
EP1325808B1 (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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Publication of EP1325808B1 publication Critical patent/EP1325808B1/en
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Classifications

    • 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 the transport of a corrugated cardboard web in a corrugated cardboard system.
  • the transport of a corrugated cardboard web is included a predetermined speed and the acceleration of the corrugated web central to a certain speed, to ensure that machining facilities meet a given Preserved section of corrugated sheet at the right time.
  • a Format changes in the slitting and creasing device must Individual corrugated web sections are accelerated to a sufficient level to create large gap within which a new positioning the cutting tools is possible.
  • the invention has for its object a transport unit for material webs to create the material web with the least possible wear transported.
  • the core the invention consists in the transport unit, a lower transport roller to be provided, which is constantly driven by a drive. Furthermore, a pull roller with a high coefficient of friction is provided with the transport roller via a torque transmission device is coupled with a freewheel. The transmission ratio of the torque transmission device is chosen so that the freewheel engages, if the speed of the corrugated cardboard web and thus the speed of circulation the pull roller falls below a predetermined value.
  • the corrugated cardboard plant 1 partially shown in Fig. 1 is as follows described in transport direction 2.
  • a corrugated cardboard web 3 is by means of a heating and pulling device 4 supplied.
  • the heating and pulling device 4 has an endless, drivable pressure belt 5, which together with a table 6 defines a gap 7 in which the corrugated cardboard web 3 is compressed becomes.
  • Behind the heating and pulling device 4 is a cross cutter 8 provided for cross cutting of the corrugated cardboard web 3.
  • a longitudinal cutting and creasing device 9 is provided downstream of the cross cutter 8.
  • creases and longitudinal cuts including an edge trim trimming are introduced into the corrugated cardboard web 3.
  • a transport unit 10 described in more detail below, in which the corrugated board web 3, when its actual speed v B (actual) falls below a target speed v B (target), is particularly transported.
  • a switch 11 is provided behind the transport unit 10, through which various parts of the corrugated cardboard web 3 are divided over two tables 12 and then fed to a double cross cutter 13 in which the corrugated cardboard strips are divided into individual sections.
  • the transport unit 10 is understood in the broadest sense to mean a unit that transports a material web, possibly also material web sections. Several material webs can also be transported side by side. Schneider-Riller machines are also understood as transport units in corrugated cardboard systems, for example.
  • the transport unit 10 has a machine frame 14 with lateral vertical support walls 15 and 16, which are parallel to each other. Between the retaining walls 15 and 16 is a horizontally arranged and perpendicular to the transport direction 2 extending transport roller 17 arranged, the two ends protruding shaft journal 18, 19, which in bearings 20, 21 in the Support walls 15 and 16 are rotatably mounted about an axis of rotation 22.
  • the Transport roller 17 is designed as a hollow roller with a roller jacket 23, to which the shaft pins 18, 19 are attached at the end.
  • the roller jacket 23 consists of metal, in particular steel.
  • the static friction number ⁇ between the surface of the transport roller 17 and one Paper material web is approximately 0.05 ⁇ ⁇ ⁇ 0.25, in particular ⁇ ⁇ 0.15.
  • the transport roller 17 Above the transport roller 17 is a pull roller 24 in bearings 25, 26 around an axis of rotation 27 is rotatably supported.
  • the bearings 25 and 26 are on support arms 28 attached to the support walls 15 and 16, respectively.
  • the pull roller 24 has a shaft 29 extending from the bearing 25 to the bearing 26 on which axially spaced from each other numerous rollers 30 are attached.
  • the roles 30 are made of plastic, in particular rubber, and have a cylindrical surface 31.
  • the draw roller surface friction coefficient is chosen so that a power transmission from the roller 30 and thus the Pull roller 24 on the corrugated web 3 is ensured.
  • the pull roller surface friction coefficient is therefore larger, in particular considerably larger than the transport roller surface friction coefficient.
  • the static friction ⁇ between the surface of the pull roller 24 and a paper material web approximately at 0.6 ⁇ ⁇ ⁇ 0.8, in particular ⁇ ⁇ 0.7.
  • a transport nip 32 is formed through which the corrugated cardboard web 3 on the transport roller 17 and the pull roller 24, respectively is guided properly.
  • the rollers 30 have evenly distributed, extending substantially radially outward, in the radial direction closed slats 33 on. However, massive rollers 30 can also be used can be used without slats 33.
  • the axes of rotation 22 and 27 run parallel to each other.
  • a drive motor 34 is attached, which via a Belt drive 35 with a pulley 36 in torque-transmitting Way is connected.
  • the pulley 36 is with the shaft journal 18th connected. Adjacent to the pulley 36 is on the journal 18 a gear 37 attached.
  • the transport roller 17, the pulley 36 and the gear 37 are rotatable about the common axis of rotation 22.
  • Above the gear 37 is in the support wall 15 with a bearing 38 around an axis of rotation 39 rotatable drive shaft 40 is mounted.
  • the drive shaft 40 has at its left end in FIG. 2 one connected to the drive shaft 40 Gear 41, which is in engagement with the gear 37.
  • the drive shaft 40 On hers opposite end is the drive shaft 40 with an articulated shaft 42 connected, which in turn is connected at its other end to the shaft 29 is.
  • the freewheel 43 is a commercially available one Freewheel, the 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 run parallel and offset from each other.
  • the mode of operation of the transport unit 10 is described below.
  • the corrugated cardboard web 3 When the corrugated cardboard web 3 is transported without problems, it has a target speed v B (target) in the transport unit 10.
  • the corrugated cardboard web is primarily pulled and possibly accelerated by units downstream of the transport unit 10.
  • 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 speed ⁇ T.
  • the transport roller 17 is driven prematurely, ie the tangential rotational speed v T is greater than the target speed v B (target) of the corrugated cardboard web 3.
  • the pull roller 24 has a tangential rotational speed v z (target) and an associated angular velocity ⁇ Z (target), where v Z (target) ⁇ v B (target), ie the rollers 30 run on the corrugated cardboard web 3 essentially without slippage With.
  • the angular velocity of the drive shaft 40 is thus also ⁇ Z (target).
  • the gearwheel 41 drives the gearwheel 41 constantly, the transmission ratio being selected such that in the event that the corrugated cardboard web 3 is transported at the speed v B (target) and thus the drive shaft 40 the angular speed ⁇ Z (target ) has no torque transmitted from the gear 41 to the drive shaft 40; the freewheel 43 thus allows a free relative rotation.
  • This has the advantage that when the corrugated cardboard web 3 is transported without problems at the desired speed v B (target), the rollers 30 are not driven, and thus the wear of the rollers 30 is also much less compared to the situation in which Rollers 30 are always driven.
  • the transmission ratio of the gear wheels 37 and 41 is selected such that in the event that the ratio a of the actual speed v B (actual) to the target Speed v B (target) falls below a predetermined value a LIM and, accordingly, 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, particularly advantageously a LIM ⁇ 0.98. It is important that a LIM lies outside the usual fluctuation range of the transport speeds v B (target) in the trouble-free state.
  • the pull roller is in trouble-free condition 24 not driven, so that their wear is relatively low.
  • Sinks Speed of the corrugated web 3 below a predetermined Limit value a torque from the drive motor is generated via the freewheel 43 34 given on the pull roller 24 so that this the corrugated web 3 conveyed at least at the predetermined limit speed.
  • This is e.g. B. in a format change in the corrugated cardboard system 1 of Importance.
  • the corrugated cardboard web 3 with the Cross cutter 8 severed.
  • the one in front of the cross cutter 8 Section of corrugated web 3 is accelerated to fill a gap for that Slitting and creasing device 9 to produce.
  • the gap is required so that the cutting tools in the device 9 new can be positioned.
  • the gap is too small because of the corrugated web section has not been removed quickly enough, the Repositioning of the tools can be canceled, causing a jam arises.
  • the corresponding removal of the corrugated cardboard web section is accomplished by the transport unit 10 covering the corrugated web section pulls out of the device 9. It is also possible that Transport unit in front of the device 9, as provided by the Reference numeral 10 'is indicated.

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 the transport of a corrugated cardboard web in a corrugated cardboard system.

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 corrugated cardboard plant, the transport of a corrugated cardboard web is included a predetermined speed and the acceleration of the corrugated web central to a certain speed, to ensure that machining facilities meet a given Preserved section of corrugated sheet at the right time. At a Format changes in the slitting and creasing device must Individual corrugated web sections are accelerated to a sufficient level to create large gap within which a new positioning the cutting tools is possible. For the removal of a corrugated sheet section are transport units at a predetermined speed known, which consist of a pair of driven rollers, between which the corrugated cardboard web is passed through. Through the constant The drive of both rollers creates a comparatively high 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 a transport unit for material webs to create the material web with the least possible wear transported.

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 core the invention consists in the transport unit, a lower transport roller to be provided, which is constantly driven by a drive. Furthermore, a pull roller with a high coefficient of friction is provided with the transport roller via a torque transmission device is coupled with a freewheel. The transmission ratio of the torque transmission device is chosen so that the freewheel engages, if the speed of the corrugated cardboard web and thus the speed of circulation the pull roller falls below a predetermined value.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Further advantageous embodiments of the invention result 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
1 shows a schematic representation of a corrugated cardboard system with a transport unit,
Fig. 2
2 shows a section of the transport unit according to section line II-II in FIG. 1,
Fig. 3
a plan view according to the arrow III in Fig. 2 and
Fig. 4
3 shows a sectional illustration along the section line IV-IV in FIG. 2.

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 cardboard plant 1 partially shown in Fig. 1 is as follows described in transport direction 2. A corrugated cardboard web 3 is by means of a heating and pulling device 4 supplied. The heating and pulling device 4 has an endless, drivable pressure belt 5, which together with a table 6 defines a gap 7 in which the corrugated cardboard web 3 is compressed becomes. Behind the heating and pulling device 4 is a cross cutter 8 provided for cross cutting of the corrugated cardboard 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.A longitudinal cutting and creasing device 9 is provided downstream of the cross cutter 8. In the longitudinal cutting and creasing device 9, creases and longitudinal cuts including an edge trim trimming are introduced into the corrugated cardboard web 3. Behind the slitting and creasing device 9 there is provided a transport unit 10, described in more detail below, in which the corrugated board web 3, when its actual speed v B (actual) falls below a target speed v B (target), is particularly transported. A switch 11 is provided behind the transport unit 10, through which various parts of the corrugated cardboard web 3 are divided over two tables 12 and then fed to a double cross cutter 13 in which the corrugated cardboard strips are divided into individual sections. The transport unit 10 is understood in the broadest sense to mean a unit that transports a material web, possibly also material web sections. Several material webs can also be transported side by side. Schneider-Riller machines are also understood as transport units in corrugated cardboard systems, for example.

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 described. The transport unit 10 has a machine frame 14 with lateral vertical support walls 15 and 16, which are parallel to each other. Between the retaining walls 15 and 16 is a horizontally arranged and perpendicular to the transport direction 2 extending transport roller 17 arranged, the two ends protruding shaft journal 18, 19, which in bearings 20, 21 in the Support walls 15 and 16 are rotatably mounted about an axis of rotation 22. The Transport roller 17 is designed as a hollow roller with a roller jacket 23, to which the shaft pins 18, 19 are attached at the end. The roller jacket 23 consists of metal, in particular steel. The static friction number µ between the surface of the transport roller 17 and one Paper material 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 is a pull roller 24 in bearings 25, 26 around an axis of rotation 27 is rotatably supported. The bearings 25 and 26 are on support arms 28 attached to the support walls 15 and 16, respectively. The pull roller 24 has a shaft 29 extending from the bearing 25 to the bearing 26 on which axially spaced from each other numerous rollers 30 are attached. The roles 30 are made of plastic, in particular rubber, and have a cylindrical surface 31. The draw roller surface friction coefficient is chosen so that a power transmission from the roller 30 and thus the Pull roller 24 on the corrugated web 3 is ensured. The pull roller surface friction coefficient is therefore larger, in particular considerably larger than the transport roller surface friction coefficient. The static friction µ between the surface of the pull roller 24 and a paper material web approximately at 0.6 ≤ µ ≤ 0.8, in particular µ ≈ 0.7. Between the pull roller 24 and the transport roller 17, a transport nip 32 is formed through which the corrugated cardboard web 3 on the transport roller 17 and the pull roller 24, respectively is guided properly. The rollers 30 have evenly distributed, extending substantially radially outward, in the radial direction closed slats 33 on. However, massive rollers 30 can also be used can be used without slats 33. The axes of rotation 22 and 27 run parallel to each other.

An der Stützwand 15 ist ein Antriebsmotor 34 befestigt, der über einen Riemenantrieb 35 mit einer Riemenscheibe 36 in drehmomentübertagender 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 attached, which via a Belt drive 35 with a pulley 36 in torque-transmitting Way is connected. The pulley 36 is with the shaft journal 18th connected. Adjacent to the pulley 36 is on the journal 18 a gear 37 attached. The transport roller 17, the pulley 36 and the gear 37 are rotatable about the common axis of rotation 22. Above the gear 37 is in the support wall 15 with a bearing 38 around an axis of rotation 39 rotatable drive shaft 40 is mounted. The drive shaft 40 has at its left end in FIG. 2 one connected to the drive shaft 40 Gear 41, which is in engagement with the gear 37. On hers opposite end is the drive shaft 40 with an articulated shaft 42 connected, which in turn is connected at its other end to the shaft 29 is. There is a freewheel between the gear 41 and the drive shaft 40 43 arranged. The freewheel 43 is a commercially available one Freewheel, the 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 run 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 mode of operation of the transport unit 10 is described below. When the corrugated cardboard web 3 is transported without problems, it has a target speed v B (target) in the transport unit 10. The corrugated cardboard web is primarily pulled and possibly accelerated by units downstream of the transport unit 10. 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 speed ω T. The transport roller 17 is driven prematurely, ie the tangential rotational speed v T is greater than the target speed v B (target) of the corrugated cardboard web 3. In particular, the following applies: v T / v B (target)> 1, in particular v T / v B (target) ≥1.01 and particularly advantageously v T / v B (target) ≥1.04. The pull roller 24 has a tangential rotational speed v z (target) and an associated angular velocity ω Z (target), where v Z (target) ≈v B (target), ie the rollers 30 run on the corrugated cardboard web 3 essentially without slippage With. The angular velocity of the drive shaft 40 is thus also ω Z (target). The gearwheel 41 drives the gearwheel 41 constantly, the transmission ratio being selected such that in the event that the corrugated cardboard web 3 is transported at the speed v B (target) and thus the drive shaft 40 the angular speed ω Z (target ) has no torque transmitted from the gear 41 to the drive shaft 40; the freewheel 43 thus allows a free relative rotation. This has the advantage that when the corrugated cardboard web 3 is transported without problems at the desired speed v B (target), the rollers 30 are not driven, and thus the wear of the rollers 30 is also much less 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.Is it z. B. in connection with a format change in the slitting and creasing device 9 to a decrease in the speed of the corrugated cardboard web 3 in the transport unit 10 and thus to a malfunction, an actual speed v B (actual) the corrugated web 3, which is lower than the target speed v B (target). The transport roller 17, which is fixedly connected to the drive motor 34, continues to slip with a tangential rotational speed v T which is greater than the target speed v B (target) of the corrugated cardboard web 3. The pulling roller 24 resting on the corrugated cardboard web 3 slows down However, then that a new tangential rotational speed v Z (is) with an associated angular velocity ω Z (actual) adjusts, in which: v Z (actual) ≈v B (actual) <v B (nominal). The gearwheel 37 drives the gearwheel 41 at a speed which is independent of the speed of the corrugated cardboard web 3. By reducing the speed of the corrugated cardboard web 3, the angular speed of the drive shaft 40 is reduced. The transmission ratio of the gear wheels 37 and 41 is selected such that in the event that the ratio a of the actual speed v B (actual) to the target Speed v B (target) falls below a predetermined value a LIM and, accordingly, 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. The following applies to a LIM : a LIM <1, a LIM ≤0.99, particularly advantageously a LIM ≈0.98. It is important that a LIM lies outside the usual fluctuation range of the transport speeds v B (target) in the trouble-free state. This is intended to prevent the freewheel 43 from being constantly switched on and the shaft 29 being driven in the event of normal fluctuations in the transport speed of the corrugated cardboard web 3. Aside from signs of wear, this would cause the system to rock. If the fluctuations in the speed of the corrugated cardboard web 3 are approximately 1% in the fault-free state, it makes sense for the drive of the pull roller 24 when the speed of the corrugated cardboard web 3 falls below by more than 2%, corresponding to a factor a LIM = 0.98, is switched on. If the fluctuations in the speed of the corrugated cardboard web 3 are lower in the fault-free state, then a LIM can also be closer to 1, e.g. B. a LIM ≈0.99. If the fluctuations are greater, then 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.It is particularly advantageous on the transport unit 10 that no electronic Control is required. The pull roller is in trouble-free condition 24 not driven, so that their wear is relatively low. Sinks Speed of the corrugated web 3 below a predetermined Limit value, a torque from the drive motor is generated via the freewheel 43 34 given on the pull roller 24 so that this the corrugated web 3 conveyed at least at the predetermined limit speed. This is e.g. B. in a format change in the corrugated cardboard system 1 of Importance. For the format change, the corrugated cardboard web 3 with the Cross cutter 8 severed. The one in front of the cross cutter 8 Section of corrugated web 3 is accelerated to fill a gap for that Slitting and creasing device 9 to produce. The gap is required so that the cutting tools in the device 9 new can be positioned. The gap is too small because of the corrugated web section has not been removed quickly enough, the Repositioning of the tools can be canceled, causing a jam arises. The corresponding removal of the corrugated cardboard web section is accomplished by the transport unit 10 covering the corrugated web section pulls out of the device 9. It is also possible that Transport unit in front of the device 9, as provided by the Reference numeral 10 'is indicated.

Claims (10)

Transport-Einheit zum Transport einer Materialbahn, insbesondere zum Transport einer Wellpappebahn in einer Wellpappe-Anlage, a. mit einem Maschinengestell (14), b. mit einer in dem Maschinengestell (14) um eine erste Drehachse (22) drehbar gelagerten Transportwalze (17), c. mit einem Antrieb (34) zum Antrieb der Transportwalze (17), d. mit einer in dem Maschinengestell (14) um eine zweite Drehachse (27) drehbar gelagerten Zugwalze (24), wobei i. die erste Drehachse (22) und zweite Drehachse (27) im wesentlichen parallel zueinander verlaufen, ii. zwischen der Transportwalze (17) und der Zugwalze (24) ein Transport-Spalt (32) zur Durchführung der Materialbahn (3) gebildet ist, iii. die Zugwalze (24) einen Zugwalzen-Oberflächen-Reibwert aufweist, der derart gewählt ist, dass eine Kraftübertragung von der Zugwalze (24) auf die anliegende Materialbahn (3) sichergestellt ist, und iv. die Transportwalze (17) einen Transportwalzen-Oberflächen-Reibwert aufweist, der kleiner gleich dem Zugwalzen-Oberflächen-Reibwert ist, und e. mit einer zwischen der Transportwalze (17) und der Zugwalze (24) wirkenden Drehmomentübertragungs-Einrichtung zur Drehmomentübertragung von der Transportwalze (17) auf die Zugwalze (24), wobei i. zwischen der Drehmomentübertragungs-Einrichtung und der Zugwalze (24) ein Freilauf (43) angeordnet ist. Transport unit for transporting a material web, in particular for transporting a web of corrugated cardboard in a corrugated cardboard system, a. with a machine frame (14), b. with a transport roller (17) mounted rotatably about a first axis of rotation (22) in the machine frame (14), c. with a drive (34) for driving the transport roller (17), d. with a pull roller (24) mounted in the machine frame (14) so as to be rotatable about a second axis of rotation (27), wherein i. the first axis of rotation (22) and the second axis of rotation (27) run essentially parallel to one another, ii. a transport nip (32) for carrying out the material web (3) is formed between the transport roller (17) and the pull roller (24), iii. the pull roller (24) has a pull roller surface coefficient of friction which is selected such that a force transmission from the pull roller (24) to the adjacent material web (3) is ensured, and iv. the transport roller (17) has a transport roller surface friction coefficient which is less than or equal to the pull roller surface friction coefficient, and e. with a torque transmission device acting between the transport roller (17) and the pull roller (24) for transmitting torque from the transport roller (17) to the pull roller (24), wherein i. a freewheel (43) is arranged between the torque transmission device and the pull roller (24). Transport-Einheit gemäß Anspruch 1, dadurch gekennzeichnet, dass die Drehmomentübertragungs-Einrichtung als Zahnrad-Antrieb ausgebildet ist.Transport unit according to claim 1, characterized in that the torque transmission device is designed as a gear drive. Transport-Einheit gemäß Anspruch 2, dadurch gekennzeichnet, dass der Zahnrad-Antrieb ein mit der Transportwalze (17) in drehmomentübertragender Weise verbundenes erstes Zahnrad (37) sowie ein mit der Zugwalze (24) in drehmomentübertragender Weise verbundenes zweites Zahnrad (41) aufweist, die miteinander in Eingriff sind.Transport unit according to claim 2, characterized in that the gear drive has a first gear (37) connected to the transport roller (17) in a torque-transmitting manner and a second gear (41) connected to the pulling roller (24) in a torque-transmitting manner, who are engaged with each other. Transport-Einheit gemäß Anspruch 3, dadurch gekennzeichnet, dass die Zugwalze (24) eine mit dieser in drehmomentübertragender Weise verbundene Antriebswelle (40) aufweist, wobei der Freilauf (43) zwischen dem zweiten Zahnrad (41) und der Antriebswelle (40) angeordnet ist.Transport unit according to claim 3, characterized in that the pull roller (24) has a drive shaft (40) connected to it in a torque-transmitting manner, the freewheel (43) being arranged between the second gear (41) and the drive shaft (40) , Transport-Einheit gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Zugwalze (24) eine drehbar gelagerte Zugwalzen-Welle (29) aufweist, auf der mindestens eine Rolle (30) befestigt ist.Transport unit according to one of the preceding claims, characterized in that the pull roller (24) has a rotatably mounted pull roller shaft (29) on which at least one roller (30) is fastened. Transport-Einheit gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass bei einem störungsfreien Betrieb a) die Materialbahn (3) mit einer vorbestimmten Soll-Geschwindigkeit vB(Soll) transportierbar ist, b) die Transportwalze (17) mit einer tangentialen vorbestimmten Umlaufgeschwindigkeit vT und einer zugehörigen Winkelgeschwindigkeit ωT antreibbar ist, und c) die Zugwalze (24) eine tangentiale Umlaufgeschwindigkeit vz und eine zugehörige Winkelgeschwindigkeit ωZ aufweist, so dass gilt: vZ≈vB(Soll). Transport unit according to one of the preceding claims, characterized in that in the case of trouble-free operation a) the material web (3) can be transported at a predetermined target speed v B (target), b) the transport roller (17) can be driven with a tangential predetermined rotational speed v T and an associated angular speed ω T , and c) the traction roller (24) has a tangential rotational speed v z and an associated angular speed ω Z , so that the following applies: v Z ≈v B (target). Transport-Einheit gemäß Anspruch 6, dadurch gekennzeichnet, dass für das Verhältnis der tangentialen Umlaufgeschwindigkeit vT der Transportwalze zur Soll-Geschwindigkeit vB(Soll) der Materialbahn (3) gilt: vT/vB(Soll)>1, insbesondere vT/vB(Soll)≥1,01, besonders vorteilhaft vT/vB(Soll)≈1,04.Transport unit according to claim 6, characterized in that for the ratio of the tangential rotational speed v T of the transport roller to the target speed v B (target) of the material web (3) applies: v T / v B (target)> 1, in particular v T / v B (target) ≥1.01, particularly advantageous v T / v B (target) ≈1.04. Transport-Einheit gemäß Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Drehmomentübertragungs-Einrichtung derart ausgebildet ist, dass für den Fall, dass die Ist-Geschwindigkeit vB(Ist) der Materialbahn (3) kleiner ist als die Soll-Geschwindigkeit vB(Soll) der Materialbahn (3), über den Freilauf (43) ein Drehmoment auf die Zugwalze (24) gegeben wird, wenn für das Verhältnis der tangentialen Umlaufgeschwindigkeit vZ der Zugwalze (24) zur Sollgeschwindigkeit vB(Soll) der Materialbahn gilt: vZ/vB(Soll)<1, insbesondere vZ/vB(Soll)≤0,99, besonders vorteilhaft vZ/vB(Soll)≈0,98.Transport unit according to claim 6 or 7, characterized in that the torque transmission device is designed such that in the event that the actual speed v B (actual) of the material web (3) is lower than the target speed v B (Desired) of the material web (3), via the freewheel (43), a torque is applied to the pull roller (24) if the ratio of the tangential rotational speed v Z of the pull roller (24) to the desired speed v B (Desired) of the material web applies : v Z / v B (target) <1, in particular v Z / v B (target) ≤0.99, particularly advantageously v Z / v B (target) ≈0.98. Transport-Einheit gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass zumindest die Oberfläche der Zugwalze (24) aus Gummi besteht.Transport unit according to one of the preceding claims, characterized in that at least the surface of the pull roller (24) consists of rubber. Transport-Einheit gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass zumindest die Oberfläche der Transportwalze (17) aus Metall, insbesondere poliertem Stahl, besteht.Transport unit according to one of the preceding claims, characterized in that at least the surface of the transport roller (17) consists of metal, in particular polished steel.
EP02027009A 2002-01-08 2002-12-03 Transport structure Expired - Lifetime EP1325808B1 (en)

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DE50210694D1 (en) 2007-09-27
DE10200356A1 (en) 2003-07-17
ATE369975T1 (en) 2007-09-15
EP1325808B1 (en) 2007-08-15
US20030127486A1 (en) 2003-07-10
EP1325808A3 (en) 2005-03-09
US6869003B2 (en) 2005-03-22

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