EP0714770B1 - Device for conveying paper - Google Patents

Device for conveying paper Download PDF

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Publication number
EP0714770B1
EP0714770B1 EP95117206A EP95117206A EP0714770B1 EP 0714770 B1 EP0714770 B1 EP 0714770B1 EP 95117206 A EP95117206 A EP 95117206A EP 95117206 A EP95117206 A EP 95117206A EP 0714770 B1 EP0714770 B1 EP 0714770B1
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EP
European Patent Office
Prior art keywords
belt
drum
regions
transport device
paper transport
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95117206A
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German (de)
French (fr)
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EP0714770A1 (en
Inventor
Martin Greive
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.)
Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of EP0714770A1 publication Critical patent/EP0714770A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F21/00Devices for conveying sheets through printing apparatus or machines

Definitions

  • the invention relates to a paper transport device for Printing presses, with a drive roller, one at a distance for this arranged deflection drum and one around Drive roller and the deflection drum running around Conveyor belt that covers both areas with engaging elements also has substantially smooth areas.
  • the invention is therefore based on the object To create paper transport device for printing presses, where the paper transport is extremely synchronized with the Machine drive takes place.
  • the invention is based on the knowledge that Synchronization errors not only due to slippage of the machine belt, but also result from tolerances, for example at the manufacture or wear of the engaging elements arise and, since inevitable, an absolute Make it impossible to synchronize these bands.
  • Through the partial decoupling of the different Conveyor belt areas in the invention act Engagement areas and the smooth surface areas advantageous together, so that on the straight running smooth surface Areas of transported paper with the greatest accuracy can be fed.
  • the mobility between the areas with Engagement elements and the substantially smooth surface Areas of the conveyor belt can be covered by any elastic means are generated in between, for example a material with a lower modulus of elasticity or one thinner material than in the other areas of the Conveyor belt.
  • the desired elasticity can be particularly generate in a simple manner that the conveyor belt between the areas with engagement elements and the in essential smooth areas with a variety of Recesses is provided in the longitudinal direction of the Conveyor belt are arranged distributed.
  • the This also makes elastic properties very precise reproducible and can be very along the conveyor belt keep constant.
  • the respective drum can adjust the belt tension and the belt can center and run in a stable path.
  • the freely rotatable Drum of the deflection drum on a concave outer surface.
  • the outer surface of the drive roller form concave, or there may be convex lateral surfaces be used.
  • this is Conveyor belt preferably made of conventional components composed, namely a flat machine belt and two timing belt attached to the side, the machine belt the substantially smooth areas of the Conveyor belt forms and the toothed belt the areas of the Form conveyor belt with engaging elements.
  • the machine belt the substantially smooth areas of the Conveyor belt forms and the toothed belt the areas of the Form conveyor belt with engaging elements.
  • Fig. 1 contains a drive roller 1, which in Fig. 2 still once enlarged, one on the machine side mounted and driven drive shaft 2.
  • Toothed pulleys 3 On the Drive shaft 2 are two at an axial distance Toothed pulleys 3, each with an outer one, for toothed belts suitable toothing attached.
  • Toothed pulleys 3 Between the two A cylindrical drum 4 extends with toothed disks 3 pretty much the same diameter as that Toothed pulleys 3.
  • the drum 4 is by means of two separate Bearing 5 rotatably mounted on the drive shaft 2 so that it is rotatable against the toothed disks 3.
  • On the deflection shaft 7 are at the same axial distance like the toothed discs 3 of the drive shaft 2 two Toothed washers 8 with a larger diameter than the toothed washers 3 rotatably mounted.
  • a drum 9 extends at its axial ends pretty much the same diameter as the pulleys 8 and a slightly smaller diameter towards the center has, so that a lateral surface 10 of the drum 9 a has a slightly concave cross section.
  • the drum 9 is by means of two separate bearings 11 rotatable on two to the Toothed washers 8 cast hollow pin 12 stored in each case from the toothed disks 8 without the deflection shaft 7 touch, protrude inwards.
  • the conveyor belt 13 is in one in the direction of its width middle, by a smooth machine belt 14 formed area and two by a toothed belt 15th formed edge areas divided.
  • the machine belt 14 lies on the drive roller 1 and the deflection drum 6 on their separately rotatable drums 4 and 9, while the Toothed belt 15 on the drive roller 1 and the deflection drum 6 rest on their tooth lock washers 3 or 8.
  • the recesses 16 have the Form of slots that are transverse to the longitudinal direction of the Conveyor belt 13 or machine belt 14 run, but are much shorter than the machine belt 14 wide is, so that the width of the paper transport available Machine belt 14 is not significantly restricted.
  • the deflection shaft 7 of the deflection drum 6 is in at its ends a U-shaped bracket 17 which holds the deflection drum 6 embraces.
  • the bracket 17 is in one at its base Pivotal point 18 is mounted so that it is in the plane of FIG. 1 or 3 is pivotable about the pivot point 18.
  • Pivotal point 18 lies in a plane that is perpendicular through a imaginary center line of the conveyor belt 13 in its Longitudinal direction.
  • the fulcrum 18 is also in stationary with respect to the machine, as in FIGS. 1 and 3 indicated, so that the conveyor belt 13 is kept taut becomes.
  • the machine belt 14 has a reduced thickness at its edge 19, and Toothed belt 15 has an extension 20 which over the Edge 19 placed and for example by gluing it is attached.
  • the reduction in thickness at the edge 19 of the Machine belt 14 and the location of the extension 20 of the Timing belts 15 are selected so that in the longitudinal direction running tensile strands 21 in the toothed belt 15 as exactly as possible at the level of the neutral fiber of the Machine belt 14 lie.
  • the conveyor belt 13 can also be made in one piece be.
  • the transport device described above has the Effect that the conveyor belt 13 on the straight line between the drive roller 1 and the deflection drum 6 runs practically absolutely synchronized with the drive roller 1, so that paper with an accuracy of a few ⁇ m can be transported.
  • a slip of the machine belt 14 for Drive roller 1 affects the currently running piece of tape not from. Relative movements between the timing belts 15 and the machine belt 14, which inevitably due to tolerances are created by the rotatably mounted drums 4, 9 as well as the relatively elastic connection of the Timing belt 15 balanced with the machine belt 14.
  • the pivotable mounting of the guide drum 6 can Center the conveyor belt 13 and in a stable path to run. The same effect occurs when the fulcrum 18 not, as shown in FIG. 1, outside the deflection drum 6 and the drive roller 1, but in between.

Landscapes

  • Delivering By Means Of Belts And Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Description

Die Erfindung betrifft eine Papiertransportvorrichtung für Druckmaschinen, mit einer Antriebswalze, einer im Abstand dazu angeordneten Umlenktrommel und einem um die Antriebswalze und die Umlenktrommel herum verlaufenden Transportband, das sowohl Bereiche mit Eingriffselementen als auch im wesentlichen glattflächige Bereiche aufweist.The invention relates to a paper transport device for Printing presses, with a drive roller, one at a distance for this arranged deflection drum and one around Drive roller and the deflection drum running around Conveyor belt that covers both areas with engaging elements also has substantially smooth areas.

Für den Transport von Papierbogen zwischen den verschiedenen Stationen einer Druckmaschine gibt es Transportbänder, die aus einfachen breiten Endlos-Bändern bestehen, die um Antriebswalzen und Umlenktrommeln umlaufen. Da solche glattflächigen Bänder einem gewissen Schlupf unterliegen, sind sie mit dem Maschinenlauf nicht synchron. Falls es auf den genauen Zeitpunkt der Übergabe an die nächste Station ankommt, müssen die Transportbänder daher synchronisiert werden. Zu diesem Zweck hat die Anmelderin der vorliegenden Erfindung einfache Maschinenbänder mit Eingriffen für antriebsseitige Verzahnungen versehen, wobei sich Transportvorrichtungen der obengenannten Art ergaben.For the transport of paper sheets between the different There are conveyor belts on a printing press that consist of simple wide endless tapes around Rotate drive rollers and deflection drums. Because such smooth strips are subject to a certain amount of slippage, they are out of sync with the machine run. If it is on the exact time of handover to the next station arrives, the conveyor belts must therefore be synchronized will. For this purpose the applicant of the present Invention of simple machine tapes with interventions for provided gear teeth on the drive side, whereby Transport devices of the type mentioned above.

Es hat sich jedoch herausgestellt, daß solche Bänder keine sehr hohen Anforderungen an die Übergabegenauigkeit erfüllen können, wie sie im Zuge neuerer Entwicklungen bei Druckmaschinen gestellt werden.However, it has been found that such tapes are not meet very high requirements for transfer accuracy can, as in the course of recent developments Printing presses.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Papiertransportvorrichtung für Druckmaschinen zu schaffen, bei der der Papiertransport äußerst synchron mit dem Maschinenantrieb erfolgt. The invention is therefore based on the object To create paper transport device for printing presses, where the paper transport is extremely synchronized with the Machine drive takes place.

Diese Aufgabe wird bei einer gattungsgemäßen Papiertransportvorrichtung erfindungsgemäß dadurch gelöst, daß die Antriebswalze und die Umlenktrommel jeweils in axial getrennte Trommelabschnitte unterteilt sind, die unabhängig voneinander drehbar sind und um die herum zum einen die Bereiche mit Eingriffselementen und zum anderen die im wesentlichen glattflächigen Bereiche des Transportbandes verlaufen, und dadurch, daß das Transportband zwischen den Bereichen mit Eingriffselementen und den im wesentlichen glattflächigen Bereichen so ausgebildet ist, daß kleine Relativbewegungen in der Längsrichtung zwischen diesen Bereichen möglich sind.This task is done with a generic Paper transport device according to the invention solved by that the drive roller and the deflection drum each in axial separate drum sections are divided that are independent are rotatable from each other and on the one hand the Areas with engaging elements and the other in the essential smooth areas of the conveyor belt run, and in that the conveyor belt between the Areas with engagement elements and the essentially smooth areas is designed so that small Relative movements in the longitudinal direction between them Areas are possible.

Der Erfindung liegt die Erkenntnis zugrunde, daß sich Gleichlauffehler nicht nur durch Schlupf des Maschinenbandes, sondern auch durch Toleranzen ergeben, die beispielsweise bei der Herstellung oder durch Abnutzung der Eingriffselemente entstehen und die, da unvermeidlich, einen absoluten Gleichlauf dieser Bänder unmöglich machen. Durch die teilweise Entkopplung der unterschiedlichen Transportbandbereiche bei der Erfindung wirken die Eingriffsbereiche und die glattflächigen Bereiche vorteilhaft zusammen, so daß sich auf den gerade laufenden glattflächigen Bereichen transportiertes Papier mit größter Genauigkeit zuführen läßt.The invention is based on the knowledge that Synchronization errors not only due to slippage of the machine belt, but also result from tolerances, for example at the manufacture or wear of the engaging elements arise and, since inevitable, an absolute Make it impossible to synchronize these bands. Through the partial decoupling of the different Conveyor belt areas in the invention act Engagement areas and the smooth surface areas advantageous together, so that on the straight running smooth surface Areas of transported paper with the greatest accuracy can be fed.

Die Beweglichkeit zwischen den Bereichen mit Eingriffselementen und den im wesentlichen glattflächigen Bereichen des Transportbandes kann durch irgendwelche elastischen Mittel dazwischen erzeugt werden, zum Beispiel einen Werkstoff mit geringerem Elastizitätsmodul bzw. einen dünneren Werkstoff als in den übrigen Bereichen des Transportbandes.The mobility between the areas with Engagement elements and the substantially smooth surface Areas of the conveyor belt can be covered by any elastic means are generated in between, for example a material with a lower modulus of elasticity or one thinner material than in the other areas of the Conveyor belt.

Die gewünschte Elastizität läßt sich auf eine besonders einfache Weise dadurch erzeugen, daß das Transportband zwischen den Bereichen mit Eingriffselementen und den im wesentlichen glattflächigen Bereichen mit einer Vielzahl von Aussparungen versehen wird, die in Längsrichtung des Transportbandes verteilt angeordnet sind. Die Elastizitätseigenschaften werden dadurch außerdem sehr genau reproduzierbar und lassen sich längs des Transportbandes sehr konstant halten.The desired elasticity can be particularly generate in a simple manner that the conveyor belt between the areas with engagement elements and the in essential smooth areas with a variety of Recesses is provided in the longitudinal direction of the Conveyor belt are arranged distributed. The This also makes elastic properties very precise reproducible and can be very along the conveyor belt keep constant.

Werden die Aussparungen durch quer zur Längsrichtung des Transportbandes verlaufende Schlitze gebildet, so erlauben die zwischen diesen Aussparungen verbleibenden schmalen Stege bei einer minimalen Einbuße an nutzbarer Transportfläche eine Relativbewegung zwischen den Bandabschnitten.Are the recesses through transverse to the longitudinal direction of the Conveyor belt slits formed so allow the narrow webs remaining between these cutouts with a minimal loss of usable transport space Relative movement between the band sections.

Bei der bevorzugten Ausführungsform werden die axial getrennten Trommelabschnitte dadurch gebildet, daß die Antriebswalze und die Umlenktrommel jeweils zwei seitliche Zahnscheiben, die auf einer Welle befestigt sind, und eine frei drehbar gelagerte Trommel zwischen den Zahnscheiben aufweisen, wobei die Zahnscheiben und die dazugehörige Trommel im wesentlichen den gleichen Durchmesser haben.In the preferred embodiment, the are axial separate drum sections formed in that the Drive roller and the deflection drum two lateral Toothed lock washers attached to a shaft and one freely rotatable drum between the lock washers have, the toothed washers and the associated Drum have substantially the same diameter.

Wenn die Umlenktrommel und/oder die Antriebswalze um einen Drehpunkt schwenkbar gelagert ist, der in einer Ebene liegt, die durch eine in der Längsrichtung verlaufende Mittellinie des Transportbandes verläuft, kann sich die jeweilige Trommel der Bandspannung anpassen, und das Band kann sich zentrieren und in einer stabilen Bahn laufen.If the deflection drum and / or the drive roller by one Pivot point is pivotally mounted, which lies in one plane, through a longitudinal centerline of the conveyor belt, the respective drum can adjust the belt tension and the belt can center and run in a stable path.

Um den Bandlauf weiter zu stabilisieren, weist in der bevorzugten Ausführungsform die frei drehbar gelagerte Trommel der Umlenktrommel eine konkave Mantelfläche auf. Je nach der Art und den Abmessungen des Bandes kann es zweckmäßig sein, auch die Mantelfläche der Antriebswalze konkav auszubilden, oder es können konvexe Mantelflächen verwendet werden. To further stabilize the belt run, points in the preferred embodiment, the freely rotatable Drum of the deflection drum on a concave outer surface. Each depending on the type and dimensions of the tape it can be appropriate, also the outer surface of the drive roller form concave, or there may be convex lateral surfaces be used.

Zwecks einfacher und kostengünstiger Herstellbarkeit wird das Transportband vorzugsweise aus herkömmlichen Bestandteilen zusammengesetzt, nämlich einem ebenen Maschinenband und zwei seitlich daran angefügten Zahnriemen, wobei das Maschinenband die im wesentlichen glattflächigen Bereiche des Transportbandes bildet und die Zahnriemen die Bereiche des Transportbandes mit Eingriffselementen bilden. Um eventuelle Gleichlauffehler von vornherein gering zu halten, sind das Maschinenband und die Zahnriemen so zusammenzufügen, daß die Zugstränge des Zahnriemens auf gleicher Höhe mit der neutralen Faser des Maschinenbandes liegen.For the sake of simple and inexpensive producibility, this is Conveyor belt preferably made of conventional components composed, namely a flat machine belt and two timing belt attached to the side, the machine belt the substantially smooth areas of the Conveyor belt forms and the toothed belt the areas of the Form conveyor belt with engaging elements. To eventual Keeping synchronism errors low from the outset is what they are Machine band and the timing belt so that the Tension cords of the toothed belt at the same level as the neutral fiber of the machine belt.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der folgenden Beschreibung der bevorzugten Ausführungsform und aus der Zeichnung, auf die Bezug genommen wird. Darin zeigen:

Fig. 1
eine Schnittansicht der Papiertransportvorrichtung von ihrer Transportseite aus sowie schematisch von der Seite;
Fig. 2
eine vergrößerte Ansicht der Antriebswalze der Papiertransportvorrichtung von Fig. 1;
Fig. 3
eine vergrößerte Ansicht der Umlenktrommel der Papiertransportvorrichtung von Fig. 1; und
Fig. 4
eine stark vergrößerte Schnittansicht eines Teils eines auf der Antriebswalze aufliegenden Transportbandes.
Further features and advantages of the invention will become apparent from the following description of the preferred embodiment and from the drawing, to which reference is made. In it show:
Fig. 1
a sectional view of the paper transport device from its transport side and schematically from the side;
Fig. 2
an enlarged view of the drive roller of the paper transport device of Fig. 1;
Fig. 3
an enlarged view of the guide drum of the paper transport device of Fig. 1; and
Fig. 4
a greatly enlarged sectional view of a portion of a conveyor belt resting on the drive roller.

In Fig. 1 enthält eine Antriebswalze 1, die in Fig. 2 noch einmal vergrößert dargestellt ist, eine maschinenseitig gelagerte und angetriebene Antriebswelle 2. Auf der Antriebswelle 2 sind in einem axialen Abstand zwei Zahnscheiben 3 mit jeweils einer äußeren, für Zahnriemen geeigneten Verzahnung befestigt. Zwischen den beiden Zahnscheiben 3 erstreckt sich eine zylindrische Trommel 4 mit ziemlich genau dem gleichen Durchmesser wie die Zahnscheiben 3. Die Trommel 4 ist mittels zweier separater Lager 5 drehbar auf der Antriebswelle 2 gelagert, so daß sie gegen die Zahnscheiben 3 verdrehbar ist.In Fig. 1 contains a drive roller 1, which in Fig. 2 still once enlarged, one on the machine side mounted and driven drive shaft 2. On the Drive shaft 2 are two at an axial distance Toothed pulleys 3, each with an outer one, for toothed belts suitable toothing attached. Between the two A cylindrical drum 4 extends with toothed disks 3 pretty much the same diameter as that Toothed pulleys 3. The drum 4 is by means of two separate Bearing 5 rotatably mounted on the drive shaft 2 so that it is rotatable against the toothed disks 3.

Eine Umlenktrommel 6 in Fig. 1, die in Fig. 3 noch einmal vergrößert dargestellt ist, enthalt eine Umlenkwelle 7, die in einem Abstand parallel zu der Antriebswelle 2 angeordnet ist. Auf der Umlenkwelle 7 sind im gleichen axialen Abstand wie die Zahnscheiben 3 der Antriebswelle 2 zwei Zahnscheiben 8 mit größerem Durchmesser als die Zahnscheiben 3 drehbar gelagert. Zwischen den beiden Zahnscheiben 8 erstreckt sich eine Trommel 9, die an ihren axialen Enden ziemlich genau den gleichen Durchmesser wie die Zahnscheiben 8 und zu ihrer Mitte hin einen etwas kleineren Durchmesser aufweist, so daß eine Mantelfläche 10 der Trommel 9 einen leicht konkaven Querschnitt hat. Die Trommel 9 ist mittels zweier separater Lager 11 drehbar auf zwei an die Zahnscheiben 8 angegossenen Hohlzapfen 12 gelagert, die jeweils von den Zahnscheiben 8, ohne die Umlenkwelle 7 zu berühren, nach innen vorstehen.A deflection drum 6 in Fig. 1, the one in Fig. 3 again is shown enlarged, contains a deflection shaft 7, the arranged at a distance parallel to the drive shaft 2 is. On the deflection shaft 7 are at the same axial distance like the toothed discs 3 of the drive shaft 2 two Toothed washers 8 with a larger diameter than the toothed washers 3 rotatably mounted. Between the two tooth lock washers 8 a drum 9 extends at its axial ends pretty much the same diameter as the pulleys 8 and a slightly smaller diameter towards the center has, so that a lateral surface 10 of the drum 9 a has a slightly concave cross section. The drum 9 is by means of two separate bearings 11 rotatable on two to the Toothed washers 8 cast hollow pin 12 stored in each case from the toothed disks 8 without the deflection shaft 7 touch, protrude inwards.

Um die Antriebswalze 1 und die Umlenktrommel 6 herum verläuft ein endloses Transportband 13, das so breit wie Antriebswalze 1 und die Umlenktrommel 6 ist und das zwei längere gerade Abschnitte dazwischen bildet. Einer der beiden geraden Abschnitte des Transportbandes 13 weist in der Druckmaschine nach oben, so daß durch Drehen der Antriebswelle 2 (nicht gezeigte) Papierbogen ein Stück weit auf dem Transportband 13 transportiert werden können.Runs around the drive roller 1 and the deflection drum 6 an endless conveyor belt 13 as wide as Drive roller 1 and the deflection drum 6 and two forms longer straight sections in between. One of both straight sections of the conveyor belt 13 points in the Printing machine upwards, so that by turning the Drive shaft 2 (not shown) sheets of paper a bit can be transported on the conveyor belt 13.

Das Transportband 13 ist in Richtung seiner Breite in einen mittleren, durch ein glattflächiges Maschinenband 14 gebildeten Bereich und zwei durch je einen Zahnriemen 15 gebildete Randbereiche unterteilt. Das Maschinenband 14 liegt an der Antriebswalze 1 und der Umlenktrommel 6 auf deren separat drehbaren Trommeln 4 bzw. 9 auf, während die Zahnriemen 15 an der Antriebswalze 1 und der Umlenktrommel 6 auf deren Zahnscheiben 3 bzw. 8 aufliegen.The conveyor belt 13 is in one in the direction of its width middle, by a smooth machine belt 14 formed area and two by a toothed belt 15th formed edge areas divided. The machine belt 14 lies on the drive roller 1 and the deflection drum 6 on their separately rotatable drums 4 and 9, while the Toothed belt 15 on the drive roller 1 and the deflection drum 6 rest on their tooth lock washers 3 or 8.

Angrenzend an die beiden Zahnriemen 15 ist das Maschinenband 14 jeweils mit einer Vielzahl von Aussparungen 16 versehen, die in regelmäßigen Abständen längs seiner Länge verteilt sind. Die Aussparungen 16 haben die Form von Schlitzen, die quer zur Längsrichtung des Transportbandes 13 bzw. des Maschinenbandes 14 verlaufen, aber wesentlich kürzer sind als das Maschinenband 14 breit ist, so daß die für den Papiertransport verfügbare Breite des Maschinenbandes 14 nicht wesentlich eingeschränkt wird.This is adjacent to the two toothed belts 15 Machine belt 14 each with a variety of Provided recesses 16, which along at regular intervals its length are distributed. The recesses 16 have the Form of slots that are transverse to the longitudinal direction of the Conveyor belt 13 or machine belt 14 run, but are much shorter than the machine belt 14 wide is, so that the width of the paper transport available Machine belt 14 is not significantly restricted.

Die Umlenkwelle 7 der Umlenktrommel 6 ist an ihren Enden in einem U-förmigen Bügel 17 gehaltert, der die Umlenktrommel 6 umgreift. Der Bügel 17 ist an seiner Basis in einem Drehpunkt 18 gelagert, so daß er in der Ebene von Fig. 1 oder 3 um den Drehpunkt 18 herum schwenkbar ist. Der Drehpunkt 18 liegt in einer Ebene, die senkrecht durch eine gedachte Mittellinie des Transportbandes 13 in seiner Längsrichtung verläuft. Der Drehpunkt 18 ist außerdem in bezug auf die Maschine ortsfest, wie in Fig. 1 und 3 angedeutet, so daß das Transportband 13 gespannt gehalten wird.The deflection shaft 7 of the deflection drum 6 is in at its ends a U-shaped bracket 17 which holds the deflection drum 6 embraces. The bracket 17 is in one at its base Pivotal point 18 is mounted so that it is in the plane of FIG. 1 or 3 is pivotable about the pivot point 18. Of the Pivotal point 18 lies in a plane that is perpendicular through a imaginary center line of the conveyor belt 13 in its Longitudinal direction. The fulcrum 18 is also in stationary with respect to the machine, as in FIGS. 1 and 3 indicated, so that the conveyor belt 13 is kept taut becomes.

Fig. 4 zeigt die Art und weise, in der das Maschinenband 14 mit den Zahnriemen 15 verbunden ist. Das Maschinenband 14 weist an seinem Rand 19 eine verringerte Dicke auf, und der Zahnriemen 15 weist einen Fortsatz 20 auf, der über den Rand 19 gelegt und beispielsweise durch Kleben daran befestigt ist. Die Dickenverringerung am Rand 19 des Maschinenbandes 14 und die Lage des Fortsatzes 20 des Zahnriemens 15 sind so gewählt, daß in Längsrichtung verlaufende Zugstränge 21 im Zahnriemen 15 so genau wie möglich auf der Höhe der neutralen Faser des Maschinenbandes 14 liegen.4 shows the manner in which the machine belt 14 is connected to the toothed belt 15. The machine belt 14 has a reduced thickness at its edge 19, and Toothed belt 15 has an extension 20 which over the Edge 19 placed and for example by gluing it is attached. The reduction in thickness at the edge 19 of the Machine belt 14 and the location of the extension 20 of the Timing belts 15 are selected so that in the longitudinal direction running tensile strands 21 in the toothed belt 15 as exactly as possible at the level of the neutral fiber of the Machine belt 14 lie.

Alternativ zu der in Fig. 4 gezeigten mehrteiligen Ausbildung kann das Transportband 13 aber auch einstückig ausgeführt sein.As an alternative to the multi-part design shown in FIG. 4 the conveyor belt 13 can also be made in one piece be.

Die vorstehend beschriebene Transportvorrichtung hat die Wirkung, daß das Transportband 13 auf der geraden Strecke zwischen der Antriebswalze 1 und der Umlenktrommel 6 praktisch absolut synchron zur Antriebswalze 1 läuft, so daß sich Papier mit einer Genauigkeit von wenigen µm transportieren läßt. Ein Schlupf des Maschinenbandes 14 zur Antriebswalze 1 wirkt sich auf das gerade laufende Bandstück nicht aus. Relativbewegungen zwischen den Zahnriemen 15 und dem Maschinenband 14, die durch Toleranzen zwangsläufig entstehen, werden durch die drehbar gelagerten Trommeln 4, 9 sowie durch die relativ elastische Verbindung der Zahnriemen 15 mit dem Maschinenband 14 ausgeglichen.The transport device described above has the Effect that the conveyor belt 13 on the straight line between the drive roller 1 and the deflection drum 6 runs practically absolutely synchronized with the drive roller 1, so that paper with an accuracy of a few µm can be transported. A slip of the machine belt 14 for Drive roller 1 affects the currently running piece of tape not from. Relative movements between the timing belts 15 and the machine belt 14, which inevitably due to tolerances are created by the rotatably mounted drums 4, 9 as well as the relatively elastic connection of the Timing belt 15 balanced with the machine belt 14.

Durch die schwenkbare Lagerung der Umlenktrommel 6 kann sich das Transportband 13 zentrieren und in einer stabilen Bahn laufen. Die gleiche Wirkung tritt ein, wenn der Drehpunkt 18 nicht, wie in Fig. 1 gezeigt, außerhalb der Umlenktrommel 6 und der Antriebswalze 1, sondern dazwischen liegt.The pivotable mounting of the guide drum 6 can Center the conveyor belt 13 and in a stable path to run. The same effect occurs when the fulcrum 18 not, as shown in FIG. 1, outside the deflection drum 6 and the drive roller 1, but in between.

Claims (8)

  1. Paper transport device for printing machines, having a drive roll, a deflection drum arranged at a distance from the said roll, and a transport belt that runs around the drive roll and the deflection drum and has both regions with engagement elements and essentially smooth-surfaced regions, characterized in that the drive roll (1) and the deflection drum (6) are each subdivided into axially separate drum sections (3, 4; 8, 9), which can rotate independently of each other and around which, on the one hand, the regions with engagement elements (15) and, on the other hand, the essentially smooth-surfaced regions (14) of the transport belt (13) run, and in that, between the regions with engagement elements (15) and the essentially smooth-surfaced regions (14), the transport belt (13) is designed in such a way that small relative movements in the longitudinal direction are possible between these regions.
  2. Paper transport device according to Claim 1, characterized in that, between the regions with engagement elements (15) and the essentially smooth-surfaced regions (14), the transport belt (13) has a large number of cutouts (16), which are distributed in the longitudinal direction of the transport belt.
  3. Paper transport device according to Claim 2, characterized in that the cutouts (16) are slots which run transversely with respect to the longitudinal direction of the transport belt (13).
  4. Paper transport device according to one of the preceding claims, characterized in that the drive roll (1) and the deflection drum (6) each have two lateral cogs (3, 8), which are respectively fastened on a shaft (2, 7), and a drum (4, 9) that is freely rotatably mounted between the cogs, the cogs and the associated drum having essentially the same diameter.
  5. Paper transport device according to Claim 4, characterized in that the freely rotatably mounted drum (9) of the deflection drum (6) has a concave or convex outer surface (10) and/or the freely rotatably mounted drum (4) of the drive roll (1) has a concave or convex outer surface.
  6. Paper transport device according to one of the preceding claims, characterized in that the deflection drum (6) and/or the drive roll (1) is/are mounted so as to pivot about a point of rotation (18) that is located in a plane that runs through a centre line of the transport belt (13), this line running in the longitudinal direction.
  7. Paper transport device according to one of the preceding claims, characterized in that the transport belt (13) is composed of a flat machine belt (14) and two toothed belts (15) joined to the latter at the sides, the machine belt forming the essentially smooth-surfaced regions of the transport belt and the toothed belts, forming the regions of the transport belt with engagement elements.
  8. Paper transport device according to Claim 7, characterized in that the machine belt (14) and the toothed belts (15) are joined in such a way that tension strands (21) of the toothed belt lie at the same level as the neutral fibre of the machine belt.
EP95117206A 1994-12-02 1995-11-02 Device for conveying paper Expired - Lifetime EP0714770B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4442982 1994-12-02
DE4442982A DE4442982C2 (en) 1994-12-02 1994-12-02 Paper transport device

Publications (2)

Publication Number Publication Date
EP0714770A1 EP0714770A1 (en) 1996-06-05
EP0714770B1 true EP0714770B1 (en) 1998-06-17

Family

ID=6534771

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95117206A Expired - Lifetime EP0714770B1 (en) 1994-12-02 1995-11-02 Device for conveying paper

Country Status (5)

Country Link
US (1) US5765679A (en)
EP (1) EP0714770B1 (en)
JP (1) JPH08225177A (en)
DE (2) DE4442982C2 (en)
ES (1) ES2119288T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0982261A3 (en) * 1998-08-18 2002-02-13 Masao Kubota High-speed continuous conveying system
DE19854327C2 (en) * 1998-11-25 2000-11-16 Klaus Edelmann Belt conveyor for a belt curve
US6279752B1 (en) * 2000-04-14 2001-08-28 Polychem Corporation Wide rectangular clarifiers
JP5282333B2 (en) * 2008-01-07 2013-09-04 株式会社Isowa Conveyor device
DE102014002360A1 (en) * 2014-02-18 2015-08-20 Beumer Gmbh & Co. Kg Transport device with an endless belt-shaped transport element

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1843208A (en) * 1929-09-03 1932-02-02 Fmc Corp Belt conveyer
US2129337A (en) * 1937-10-22 1938-09-06 Spears Joseph Mackay Conveyer
FR1186633A (en) * 1957-11-21 1959-08-28 Machine improvements for continuous table printing
US3917092A (en) * 1971-08-16 1975-11-04 Goodrich Co B F Conveyor belt with sprocket drive
SE7709553L (en) * 1976-09-28 1978-03-29 Ammeraal Nederland Bv BELT TRANSPORTOR
GB1561965A (en) * 1976-10-25 1980-03-05 Post Office Apparatus for conveying flat items
CH614908A5 (en) * 1977-11-22 1979-12-28 Buehrer Transver Ag
US4289230A (en) * 1978-01-19 1981-09-15 Mcgee Terence Troughed belt conveyors
US4421228A (en) * 1981-08-17 1983-12-20 Eastman Kodak Company Periodically aligning an endless web
DE3900341A1 (en) * 1989-01-07 1990-07-12 Fredenhagen Kg METHOD AND DEVICE FOR TRANSPORTING GOODS
FR2677339B1 (en) * 1991-06-10 1995-08-25 Fcb IMPROVEMENTS ON CONTINUOUS BELT CONVEYORS.
JPH0624598A (en) * 1992-02-25 1994-02-01 Nec Niigata Ltd Conveyer roller of electronic photograph type image forming device
TW219419B (en) * 1992-05-21 1994-01-21 Ibm Mobile data terminal with external antenna
JPH05338843A (en) * 1992-06-05 1993-12-21 Canon Inc Fixing device

Also Published As

Publication number Publication date
DE4442982A1 (en) 1996-06-05
DE4442982C2 (en) 1997-12-04
US5765679A (en) 1998-06-16
DE59502588D1 (en) 1998-07-23
EP0714770A1 (en) 1996-06-05
ES2119288T3 (en) 1998-10-01
JPH08225177A (en) 1996-09-03

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