EP0765834A1 - Device for sheet feeding - Google Patents

Device for sheet feeding Download PDF

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Publication number
EP0765834A1
EP0765834A1 EP96115357A EP96115357A EP0765834A1 EP 0765834 A1 EP0765834 A1 EP 0765834A1 EP 96115357 A EP96115357 A EP 96115357A EP 96115357 A EP96115357 A EP 96115357A EP 0765834 A1 EP0765834 A1 EP 0765834A1
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EP
European Patent Office
Prior art keywords
parts
diameter
roller
shaft
rollers
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Granted
Application number
EP96115357A
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German (de)
French (fr)
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EP0765834B1 (en
Inventor
Martin Greive
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of EP0765834A1 publication Critical patent/EP0765834A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/70Article bending or stiffening arrangements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/20Delivering or advancing articles from machines; Advancing articles to or into piles by contact with rotating friction members, e.g. rollers, brushes, or cylinders
    • B65H29/22Delivering or advancing articles from machines; Advancing articles to or into piles by contact with rotating friction members, e.g. rollers, brushes, or cylinders and introducing into a pile

Definitions

  • the invention relates to a device for sheet transport between two parallel rollers, each of which has several parts with larger and smaller diameters along its length, parts with a larger diameter of one of the rollers and parts with a smaller diameter of the other roller lying opposite each other.
  • Such a device the z. B. is known from copiers, gives a sheet conveyed between the rollers a wavy profile that extends transversely to the sheet transport direction in order to push the sheet "flying" over a long distance on a sheet stack, d. H. without a guide or support of its front area.
  • the invention is based on the problem that, in the known designs, the roller surfaces have different surface speeds, which can lead to damage on sensitive surfaces of the transported sheets.
  • one of the two rollers alternately has parts with a first diameter and parts with a second diameter that is smaller than the first diameter along its length
  • the other roller alternately has parts with a third diameter and parts along its length with a fourth diameter that is larger than the third diameter.
  • the parts of one roller with the first diameter and the parts of the other roller with the third diameter on the one hand and the parts of the one roller with the second diameter and the parts of the other roller with the fourth diameter on the other Preload on each other.
  • the different parts of each roller are cylindrical elements, which are alternately permanently connected to a continuous shaft and freely rotatably mounted thereon.
  • the two shafts are synchronized with each other by a gear mechanism, the transmission ratio of which corresponds to the ratio of the diameter of the cylindrical elements firmly connected to one shaft to the diameter of the cylindrical elements firmly connected to the other shaft. In this way, only one of the two shafts has to be driven from the outside.
  • the gearbox can be implemented in a simple manner by means of two gearwheels coupled to one another, one of which is firmly connected to one shaft and the other is firmly connected to the other shaft.
  • the device according to the invention is particularly suitable as a pair of delivery rollers for printing machines, in particular for sheet-fed printing machines with high sheet output, since even at high conveying speeds there are no sliding relative movements between the delivery rollers and the sheets.
  • the printing ink does not have to become completely abrasion-resistant at the moment the sheet enters the delivery rollers.
  • pairs of conveying rollers with different diameters are generally used in copying machines.
  • a section of such a pair of transport rollers 6, 7 is shown in Fig. 4 and has parts with larger and smaller diameters, parts with larger or smaller diameters on the transport roller 6 being opposite parts with smaller or larger diameters on the transport roller 7.
  • the transport rollers 6, 7 provide a sheet 8 transversely to a sheet transport direction, which is indicated by an arrow P, with a wave profile 9, as shown in FIG. 3. This wave profile produces a very high rigidity in the sheet transport direction P, as a result of which the sheet 8 can "fly" freely for a long distance.
  • FIG. 2 shows a pair of transport rollers 10, 11 which correspond to the transport rollers 1, 2 of FIG. 1 correspond.
  • Each transport roller 10, 11 has a shaft 12 or 13, the shafts 12, 13 being rotatably mounted in parallel and at a distance on side walls 14, 15 of a printing press.
  • Cylindrical parts 16 and cylindrical parts 17 are alternately pushed onto the shaft 12 along its length, the diameter of the parts 17 being somewhat smaller than the diameter of the parts 16.
  • the diameter of the Parts 19 is slightly larger than the diameter of the parts 18.
  • the different diameters are chosen according to the spacing of the shafts 12, 13 so that the cylindrical parts 16 and 18 touch each other on the circumference and the cylindrical parts 17 and 19 touch each other on the circumference.
  • Each cylindrical part 17, 18 is rotatably connected to the associated shaft 12 and 13, and each cylindrical part 16, 19 is freely rotatably mounted on the associated shaft 12 and 13, for. B. via ball bearings.
  • Each non-rotatably connected cylindrical part 17, 18 has an outer surface in the form of a rubber coating 20 against which the cylindrical parts 16 and 19 press.
  • the cylindrical parts 16, 17 and 18, 19 are each held together by a spring 21 in the axial direction of the shaft 12 or 13.
  • a gear 22 is axially fixed on one end of the shaft 13, which meshes with a drive gear 23 of the printing press, and on the other end of the shaft 13 a gear 24 is fixed, which meshes with a gear 25, which engages on one end of the shaft 12 is attached.
  • the gear wheels 24, 25 are profile-shifted gear wheels whose pitch circle diameter is equal to the diameter of the cylindrical parts 17 and 18 of the shafts 12 and 13, respectively.
  • the gear wheels 24 and 25 can have smaller diameters than the cylindrical parts 17 and 18, with the ratio of the diameters remaining the same, and can be coupled via a toothed belt and a gear wheel.
  • the shaft 13 In operation of the printing press, the shaft 13 is rotated via the gear wheel 22 in accordance with the machine speed, and the gear wheel 24 takes the gear wheel 25 and thus the shaft 13 with it.
  • the cylindrical parts 17, 18 with the rubber coating 20 have the same surface speeds, and thus also the same cylindrical parts 16, 19 which are always carried along by the cylindrical parts 17, 18. Therefore, the transport rollers 10, 11 have the same circumferential speeds over their entire length, and a sheet transported in between is given a corrugated profile as shown in FIG. 3 without the risk of damaging its surface.

Abstract

The device uses a pair of parallel rollers (10,11), which have smaller and larger dia. sections along their length, such that the larger dia. sections (16,19) of one roller coincide with the smaller dia. sections (17,18) of the other roller. The larger or smaller dia. sections of each roller are freely rotatable, with their rotation causing the opposing section of the other roller to be rotated. Pref. each roller has a shaft (12,13) carrying a number of cylindrical elements (16,17,18, 19), providing the different dia. sections. Both shafts are coupled together via a drive (24,25) with a conversion ratio corresponding to the dia. ratio between the smaller dia. sections of each roller.

Description

Die Erfindung betrifft eine Vorrichtung zum Bogentransport zwischen zwei parallelen Walzen, die längs ihrer Länge jeweils mehrere Teile mit größeren und mit kleineren Durchmessern aufweisen, wobei jeweils Teile mit größerem Durchmesser einer der Walzen und Teile mit kleinerem Durchmesser der anderen Walze einander gegenüber liegen.The invention relates to a device for sheet transport between two parallel rollers, each of which has several parts with larger and smaller diameters along its length, parts with a larger diameter of one of the rollers and parts with a smaller diameter of the other roller lying opposite each other.

Eine solche Vorrichtung, die z. B. aus Kopiergeräten bekannt ist, verleiht einem zwischen den Walzen beförderten Bogen ein wellenförmiges Profil, das quer zur Bogentransportrichtung verläuft, um den Bogen über eine weite Strecke "fliegend" auf einen Bogenstapel zu schieben, d. h. ohne eine Führung oder Auflage seines vorderen Bereichs.Such a device, the z. B. is known from copiers, gives a sheet conveyed between the rollers a wavy profile that extends transversely to the sheet transport direction in order to push the sheet "flying" over a long distance on a sheet stack, d. H. without a guide or support of its front area.

Der Erfindung liegt das Problem zugrunde, daß bei den bekannten Ausführungen die Walzenoberflächen unterschiedliche Oberflächengeschwindigkeiten haben, was bei empfindlichen Oberflächen der transportierten Bögen zu Beschädigungen führen kann.The invention is based on the problem that, in the known designs, the roller surfaces have different surface speeds, which can lead to damage on sensitive surfaces of the transported sheets.

Dieses Problem wird bei einer gattungsgemäßen Vorrichtung erfindungsgemäß dadurch gelöst, daß entweder die Teile mit größerem Durchmesser oder die Teile mit kleinerem Durchmesser jeder Walze frei drehbar gelagert sind und bei einer Drehung der jeweils anderen Walze von den diesen Teilen gegenüberliegenden Teilen der anderen Walze mitgenommen werden.This problem is solved in a generic device according to the invention in that either the parts with a larger diameter or the parts with a smaller diameter of each roller are freely rotatably mounted and are carried along by the parts opposite these parts of the other roller when the other roller rotates.

Auf diese Weise läßt sich verhindern, daß irgendein Teil der Walzen gleitend auf dem transportierten Bogen reibt.In this way, it is possible to prevent any part of the rollers from sliding against the sheet being transported.

In der bevorzugten Ausführungsform weist eine der beiden Walzen längs ihrer Länge abwechselnd Teile mit einem ersten Durchmesser und Teile mit einem zweiten Durchmesser auf, der kleiner als der erste Durchmesser ist, und weist die andere Walze längs ihrer Länge abwechselnd Teile mit einem dritten Durchmesser und Teile mit einem vierten Durchmesser auf, der größer als der dritte Durchmesser ist. Um den Mitnahmeeffekt zu erzielen, rollen die Teile der einen Walze mit dem ersten Durchmesser und die Teile der anderen Walze mit dem dritten Durchmesser einerseits und die Teile der einen Walze mit dem zweiten Durchmesser und die Teile der anderen Walze mit dem vierten Durchmesser andererseits unter einer Vorspannung aufeinander ab. Die verschiedenen Teile jeder Walze sind zylindrische Elemente, die abwechselnd fest mit einer durchgehenden Welle verbunden und frei drehbar darauf gelagert sind. Die beiden Wellen werden durch ein Getriebe miteinander synchronisiert, dessen Übersetzungsverhältnis dem Verhältnis des Durchmessers der fest mit der einen Welle verbundenen zylindrischen Elemente zu dem Durchmesser der fest mit der anderen Welle verbundenen zylindrischen Elemente entspricht. Auf diese Weise muß außerdem nur eine der beiden Wellen von außen angetrieben werden. Das Getriebe kann auf einfache Weise durch zwei miteinander gekoppelte Zahnräder realisiert werden, von denen eines fest mit der einen Welle und das andere fest mit der anderen Welle verbunden ist.In the preferred embodiment, one of the two rollers alternately has parts with a first diameter and parts with a second diameter that is smaller than the first diameter along its length, and the other roller alternately has parts with a third diameter and parts along its length with a fourth diameter that is larger than the third diameter. In order to achieve the entrainment effect, the parts of one roller with the first diameter and the parts of the other roller with the third diameter on the one hand and the parts of the one roller with the second diameter and the parts of the other roller with the fourth diameter on the other Preload on each other. The different parts of each roller are cylindrical elements, which are alternately permanently connected to a continuous shaft and freely rotatably mounted thereon. The two shafts are synchronized with each other by a gear mechanism, the transmission ratio of which corresponds to the ratio of the diameter of the cylindrical elements firmly connected to one shaft to the diameter of the cylindrical elements firmly connected to the other shaft. In this way, only one of the two shafts has to be driven from the outside. The gearbox can be implemented in a simple manner by means of two gearwheels coupled to one another, one of which is firmly connected to one shaft and the other is firmly connected to the other shaft.

Dadurch, daß wenigstens einer von zwei einander gegenüberliegenden Walzenteilen einen Mantel aus einem Gummimaterial aufweist, d. h. aus einem flexiblen Material, das außerdem in bezug auf die Oberfläche des gegenüberliegenden Walzenteils einen hohen Reibungskoeffizienten aufweist, wird auf eine einfache Weise erreicht, daß die Oberflächengeschwindigkeiten aller Walzenteile unabhängig vom Vorhandensein eines Bogens zwischen den Walzen stets gleich sind, so daß während des Bogeneinlaufs keine Beschleunigungen auftreten, die einen Abrieb des Bogens auf den Walzen zur Folge haben können.The fact that at least one of two opposing roller parts has a jacket made of a rubber material, that is to say of a flexible material which also has a high coefficient of friction with respect to the surface of the opposite roller part, means that the surface speeds of all the roller parts are achieved in a simple manner regardless of the presence of a sheet between the rollers are always the same, so that during the No accelerations occur at the sheet inlet, which can result in abrasion of the sheet on the rollers.

Die erfindungsgemäße Vorrichtung eignet sich besonders als Auslegertransportwalzenpaar für Druckmaschinen, insbesondere für Bogendruckmaschinen mit hoher Bogenleistung, da selbst bei hohen Fördergeschwindigkeiten keinerlei gleitende Relativbewegungen zwischen den Auslegerwalzen und den Bögen auftreten. Außerdem muß die Druckfarbe im Augenblick des Bogeneinlaufs in die Auslegerwalzen noch nicht vollständig abriebfest geworden sein.The device according to the invention is particularly suitable as a pair of delivery rollers for printing machines, in particular for sheet-fed printing machines with high sheet output, since even at high conveying speeds there are no sliding relative movements between the delivery rollers and the sheets. In addition, the printing ink does not have to become completely abrasion-resistant at the moment the sheet enters the delivery rollers.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der folgenden Beschreibung eines Ausführungsbeispiels und aus der Zeichnung, auf die Bezug genommen wird.Further features and advantages of the invention result from the following description of an exemplary embodiment and from the drawing, to which reference is made.

Darin zeigen:

Fig. 1
einen Aus leger einer Bogendruckmaschine von der Seite;
Fig. 2
einen Längsschnitt durch ein in dem Ausleger von Fig. 1 verwendetes Transportwalzenpaar;
Fig. 3
eine Skizze zur Erläuterung der Bogenversteifung durch ein Wellenprofil;
und
Fig. 4
eine Ansicht eines Transportwalzenpaares zur Bogenversteifung nach dem Stand der Technik.
In it show:
Fig. 1
from a sheet printing machine from the side;
Fig. 2
a longitudinal section through a pair of transport rollers used in the boom of Figure 1;
Fig. 3
a sketch to explain the arch stiffening by a wave profile;
and
Fig. 4
a view of a pair of transport rollers for sheet stiffening according to the prior art.

An dem in Fig. 1 dargestellten Ausleger einer Bogendruckmaschine durchläuft ein nicht dargestellter Bogen zwei parallele Transportwalzen 1, 2 und wird von diesen auf einen Auslegerstapel 3 geschoben, wo er von hinteren und seitlichen Geradstoßern 4, 5 mit dem Stapel bündig gemacht wird. Dabei muß der Bogen über eine weite Strecke "fliegend" bewegt werden, d. h . ohne eine Führung oder Auflage seines vorderen Bereichs.1, a sheet, not shown, passes through two parallel transport rollers 1, 2 and is pushed by these onto a delivery stack 3, where it is made flush with the stack by rear and side straight pushers 4, 5 becomes. The bow must be "flying" over a long distance, d. H . without a guide or support of its front area.

Um zu verhindern, daß die Bogenvorderkante absinkt und sich auf rollt, werden in Kopiergeräten im allgemeinen Transportwalzenpaare mit unterschiedlichen Durchmessern verwendet. Ein Abschnitt eines solchen Paares Transportwalzen 6, 7 ist in Fig . 4 dargestellt und weist Teile mit größeren und mit kleineren Durchmessern auf, wobei jeweils Teile mit größerem bzw. kleinerem Durchmesser an der Transportwalze 6 Teilen mit kleinerem bzw. größerem Durchmesser an der Transportwalze 7 gegenüberliegen. Die Transportwalzen 6, 7 versehen einen Bogen 8 quer zu einer Bogentransportrichtung, die durch einen Pfeil P angezeigt wird, mit einem Wellenprofil 9, wie in Fig. 3 dargestellt. Dieses Wellenprofilerzeugt in der Bogentransportrichtung P eine sehr hohe Steifigkeit, wodurch der Bogen 8 eine weite Strecke frei "fliegen" kann.In order to prevent the leading edge of the sheet from sinking and rolling up, pairs of conveying rollers with different diameters are generally used in copying machines. A section of such a pair of transport rollers 6, 7 is shown in Fig. 4 and has parts with larger and smaller diameters, parts with larger or smaller diameters on the transport roller 6 being opposite parts with smaller or larger diameters on the transport roller 7. The transport rollers 6, 7 provide a sheet 8 transversely to a sheet transport direction, which is indicated by an arrow P, with a wave profile 9, as shown in FIG. 3. This wave profile produces a very high rigidity in the sheet transport direction P, as a result of which the sheet 8 can "fly" freely for a long distance.

Da die Teile mit unterschiedlichen Durchmessern der herkömmlichen Transportwalzen 6 bzw. 7 drehfest miteinander verbunden sind, weisen sie unterschiedliche Oberflächengeschwindigkeiten auf.Since the parts with different diameters of the conventional transport rollers 6 and 7 are connected to one another in a rotationally fixed manner, they have different surface speeds.

In Fig . 2 ist ein Paar Transportwalzen 10, 11 dargestellt, die den Transportwalzen 1, 2 von Fig . 1 entsprechen. Jede Transportwalze 10, 11 weist eine Welle 12 bzw. 13 auf, wobei die Wellen 12, 13 parallel und in einem Abstand an Seitenwänden 14, 15 einer Druckmaschine drehbar gelagert sind. Auf die Welle 12 sind längs ihrer Länge abwechselnd zylindrische Teile 16 und zylindrische Teile 17 aufgeschoben, wobei der Durchmesser der Teile 17 etwas kleiner als der Durchmesser der Teile 16 ist. Auf die Welle 13 sind längs ihrer Länge abwechselnd zylindrische Teile 18 und zylindrische Teile 19 aufgeschoben, wobei der Durchmesser der Teile 19 etwas größer als der Durchmesser der Teile 18 ist. Die verschiedenen Durchmesser sind entsprechend dem Abstand der Wellen 12, 13 so gewählt, daß die zylindrischen Teile 16 und 18 einander am Umfang berühren und die zylindrischen Teile 17 und 19 einander am Umfang berühren.In Fig. 2 shows a pair of transport rollers 10, 11 which correspond to the transport rollers 1, 2 of FIG. 1 correspond. Each transport roller 10, 11 has a shaft 12 or 13, the shafts 12, 13 being rotatably mounted in parallel and at a distance on side walls 14, 15 of a printing press. Cylindrical parts 16 and cylindrical parts 17 are alternately pushed onto the shaft 12 along its length, the diameter of the parts 17 being somewhat smaller than the diameter of the parts 16. On the shaft 13, cylindrical parts 18 and cylindrical parts 19 are alternately pushed along its length, the diameter of the Parts 19 is slightly larger than the diameter of the parts 18. The different diameters are chosen according to the spacing of the shafts 12, 13 so that the cylindrical parts 16 and 18 touch each other on the circumference and the cylindrical parts 17 and 19 touch each other on the circumference.

Jeder zylindrische Teil 17, 18 ist drehfest mit der zugehörigen Welle 12 bzw. 13 verbunden, und jeder zylindrische Teil 16, 19 ist frei drehbar auf der zugehörigen Welle 12 bzw. 13 gelagert, z. B. über Kugellager. Jedes drehfest verbundene zylindrische Teil 17, 18 weist eine Mantelfläche in Form einer Gummibeschichtung 20 auf, gegen die die zylindrischen Teile 16 bzw. 19 drücken. Die zylindrischen Teile 16, 17 bzw. 18, 19 werden jeweils durch eine Feder 21 in Axialrichtung der Welle 12 bzw. 13 zusammengehalten.Each cylindrical part 17, 18 is rotatably connected to the associated shaft 12 and 13, and each cylindrical part 16, 19 is freely rotatably mounted on the associated shaft 12 and 13, for. B. via ball bearings. Each non-rotatably connected cylindrical part 17, 18 has an outer surface in the form of a rubber coating 20 against which the cylindrical parts 16 and 19 press. The cylindrical parts 16, 17 and 18, 19 are each held together by a spring 21 in the axial direction of the shaft 12 or 13.

Auf einem Ende der Welle 13 ist ein Zahnrad 22 axial befestigt, das in ein Antriebszahnrad 23 der Druckmaschine eingreift, und auf dem anderen Ende der Welle 13 ist ein Zahnrad 24 befestigt, das in ein Zahnrad 25 eingreift, das auf einem Ende der Welle 12 befestigt ist. Die Zahnräder 24, 25 sind profilverschobene Zahnräder, deren Wälzkreisdurchmesser gleich dem Durchmesser der zylindrischen Teile 17 bzw. 18 der Wellen 12 bzw. 13 ist. Als nicht dargestellte Alternative können die Zahnräder 24 und 25 - bei gleichbleibenden Verhältnis der Durchmesser - kleinere Durchmesser als die zylindrischen Teile 17 bzw. 18 aufweisen und über einen Zahnriemen und ein Zahnrad gekoppelt sein.A gear 22 is axially fixed on one end of the shaft 13, which meshes with a drive gear 23 of the printing press, and on the other end of the shaft 13 a gear 24 is fixed, which meshes with a gear 25, which engages on one end of the shaft 12 is attached. The gear wheels 24, 25 are profile-shifted gear wheels whose pitch circle diameter is equal to the diameter of the cylindrical parts 17 and 18 of the shafts 12 and 13, respectively. As an alternative (not shown), the gear wheels 24 and 25 can have smaller diameters than the cylindrical parts 17 and 18, with the ratio of the diameters remaining the same, and can be coupled via a toothed belt and a gear wheel.

Im Betrieb der Druckmaschine wird die Welle 13 über das Zahnrad 22 entsprechend der Maschinengeschwindigkeit gedreht, und das Zahnrad 24 nimmt das Zahnrad 25 und damit die Welle 13 mit. Wenn sich die Wellen 12, 13 drehen, haben die zylindrischen Teile 17, 18 mit der Gummibeschichtung 20 die gleichen Oberflächengeschwindigkeiten, und somit auch die zylindrischen Teile 16, 19, die stets von den zylindrischen Teilen 17, 18 mitgenommen werden. Daher weisen die Transportwalzen 10, 11 auf ihrer gesamten Länge gleiche Umfangsgeschwindigkeiten auf, und ein dazwischen transportierter Bogen erhält ein Wellenprofil wie in Fig. 3 gezeigt, ohne daß die Gefahr besteht, daß seine Oberfläche beschädigt wird.In operation of the printing press, the shaft 13 is rotated via the gear wheel 22 in accordance with the machine speed, and the gear wheel 24 takes the gear wheel 25 and thus the shaft 13 with it. When the shafts 12, 13 rotate, the cylindrical parts 17, 18 with the rubber coating 20 have the same surface speeds, and thus also the same cylindrical parts 16, 19 which are always carried along by the cylindrical parts 17, 18. Therefore, the transport rollers 10, 11 have the same circumferential speeds over their entire length, and a sheet transported in between is given a corrugated profile as shown in FIG. 3 without the risk of damaging its surface.

Claims (6)

Vorrichtung zum Bogentransport zwischen zwei parallelen Walzen, die jeweils längs ihrer Länge mehrere Teile mit größeren und mit kleineren Durchmessern aufweisen, wobei jeweils Teile mit größerem Durchmesser einer der Walzen und Teile mit kleinerem Durchmesser der anderen Walze einander gegenüberliegen,
dadurch gekennzeichnet,
daß entweder die Teile mit größerem Durchmesser (16, 19) oder die Teile mit kleinerem Durchmesser jeder Walze (10, 11) frei drehbar gelagert sind und bei einer Drehung der jeweils anderen Walze von den diesen Teilen gegenüberliegenden angetriebenen Teilen (17, 18) der anderen Walze mitgenommen werden.
Device for transporting sheets between two parallel rollers, each of which has several parts with larger and smaller diameters along its length, parts with a larger diameter of one of the rollers and parts with a smaller diameter of the other roller lying opposite one another,
characterized by
that either the parts with a larger diameter (16, 19) or the parts with a smaller diameter of each roller (10, 11) are freely rotatably mounted and when the other roller rotates from the driven parts (17, 18) opposite these parts other roller.
Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß eine (10) der beiden Walzen längs ihrer Länge abwechselnd Teile (16) mit einem ersten Durchmesser und Teile (17) mit einem zweiten Durchmesser aufweist, der kleiner als der erste Durchmesser ist, und die andere Walze (11) längs ihrer Länge abwechselnd Teile (18) mit einem dritten Durchmesser und Teile (19) mit einem vierten Durchmesser aufweist, der größer als der dritte Durchmesser ist, wobei einerseits die Teile (16) der einen Walze mit dem ersten Durchmesser und die Teile (18) der anderen Walze mit dem dritten Durchmesser und andererseits die Teile (17) der einen Walze mit dem zweiten Durchmesser und die Teile (19) der anderen Walze mit dem vierten Durchmesser unter einer Vorspannung aufeinander abrollen.
Device according to claim 1,
characterized by
that one (10) of the two rolls alternately along its length has parts (16) with a first diameter and parts (17) with a second diameter which is smaller than the first diameter, and the other roll (11) alternately along their length Parts (18) with a third diameter and parts (19) with a fourth diameter which is larger than the third diameter, the parts (16) of one roller with the first diameter and the parts (18) of the other roller with the third diameter and, on the other hand, the parts (17) of one roller with the second diameter and the parts (19) of the other roller with the fourth diameter roll onto one another under a prestress.
Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß jede Walze (10, 11) eine Welle (12, 13) und mehrere zylindrische Elemente (16, 17, 18, 19) aufweist, die die Teile mit den verschiedenen Durchmessern bilden und die abwechselnd fest mit der Welle verbunden und frei auf der Welle drehbar gelagert sind, und daß die beiden Wellen (12, 13) durch ein Getriebe (24, 25) miteinander gekoppelt sind, dessen Übersetzungsverhältnis dem Verhältnis des Durchmessers der fest mit der einen Welle (12) verbundenen zylindrischen Elemente (17) zu dem Durchmesser der fest mit der anderen Welle (13) verbundenen zylindrischen Elemente (18) entspricht.
Device according to claim 2,
characterized by
that each roller (10, 11) has a shaft (12, 13) and a plurality of cylindrical elements (16, 17, 18, 19) which form the parts with the different diameters and which are alternately firmly connected to the shaft and freely on the Shaft are rotatably mounted, and that the two shafts (12, 13) are coupled to one another by a gear (24, 25), the transmission ratio of which is the ratio of the diameter of the cylindrical elements (17) fixedly connected to the one shaft (12) Corresponds to the diameter of the cylindrical elements (18) firmly connected to the other shaft (13).
Vorrichtung nach Anspruch 3,
dadurch gekennzeichnet,
daß das Getriebe durch zwei miteinander gekoppelte Zahnräder (24, 25) gebildet wird, von denen eines (24) fest mit der einen Welle (12) und das andere (25) fest mit der anderen Welle (13) verbunden ist.
Device according to claim 3,
characterized by
that the transmission is formed by two coupled gears (24, 25), one (24) of which is fixedly connected to one shaft (12) and the other (25) of which is firmly connected to the other shaft (13).
Vorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet,
daß wenigstens einer von zwei einander gegenüberliegenden Teilen der Walzen einen Mantel (20) aus einem Gummimaterial aufweist.
Device according to one of the preceding claims,
characterized by
that at least one of two opposite parts of the rollers has a casing (20) made of a rubber material.
Vorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet,
daß die beiden Walzen (10, 11) ein Paar Auslegerwalzen für eine Druckmaschine sind.
Device according to one of the preceding claims,
characterized by
that the two rollers (10, 11) are a pair of delivery rollers for a printing press.
EP96115357A 1995-09-29 1996-09-25 Device for sheet feeding Expired - Lifetime EP0765834B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19536358A DE19536358A1 (en) 1995-09-29 1995-09-29 Device for transporting sheets
DE19536358 1995-09-29

Publications (2)

Publication Number Publication Date
EP0765834A1 true EP0765834A1 (en) 1997-04-02
EP0765834B1 EP0765834B1 (en) 1998-12-16

Family

ID=7773606

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96115357A Expired - Lifetime EP0765834B1 (en) 1995-09-29 1996-09-25 Device for sheet feeding

Country Status (6)

Country Link
US (1) US5927709A (en)
EP (1) EP0765834B1 (en)
JP (1) JPH09142692A (en)
CN (1) CN1149029A (en)
AU (1) AU6589396A (en)
DE (2) DE19536358A1 (en)

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DE102005013756A1 (en) * 2005-03-22 2006-10-05 Eastman Kodak Company Sheet transfer device for electrophotographic printer, transfers thick sheet without bending by setting force acting on upper or lower lowers according to weight per unit area of sheet
DE102005042036A1 (en) * 2005-09-02 2007-03-15 Eastman Kodak Co. Device for sheet by sheet delivery of sheets, has third-point attachment mounted on two distant coaxial roles, which post-shifts a triangle for respective withdrawal of sheet from the transportation gap

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CN1053594C (en) * 1997-10-23 2000-06-21 何志雄 Square golf bag
US6193232B1 (en) * 1999-07-06 2001-02-27 Hewlett-Packard Company Drive mechanism for sheet material feed roller
US7300055B2 (en) * 2003-04-17 2007-11-27 Kyocera Mita Corporation Image forming apparatus
JP2005247442A (en) * 2004-03-01 2005-09-15 Murata Mach Ltd Eject roller device
DE102006044198A1 (en) * 2006-09-15 2008-03-27 Eastman Kodak Company Flexible, flat goods i.e. sheets, stiffening method for use with printing machine, involves stiffening reworking organ of stiffening shaft during transporting of goods, and laterally providing goods adjacent to shaft ridge run
FR2920339B1 (en) * 2007-08-27 2010-03-12 Goss Systemes Graphiques Nante DEVICE FOR DRIVING ONE OR MORE THREADED BANDS FOR ROTARY PRESS AND ROTARY PRESS
JP4889805B2 (en) * 2010-08-06 2012-03-07 シャープ株式会社 Sheet conveying apparatus and image forming apparatus having the same
CN104494285B (en) * 2014-12-26 2016-11-30 青岛玉兰祥商务服务有限公司 A kind of printed medium clamping guide
JP2016124657A (en) * 2014-12-26 2016-07-11 株式会社リコー Recording sheet conveyance device and image formation apparatus using the same

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DE102005042036A1 (en) * 2005-09-02 2007-03-15 Eastman Kodak Co. Device for sheet by sheet delivery of sheets, has third-point attachment mounted on two distant coaxial roles, which post-shifts a triangle for respective withdrawal of sheet from the transportation gap
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Also Published As

Publication number Publication date
DE19536358A1 (en) 1997-04-03
JPH09142692A (en) 1997-06-03
EP0765834B1 (en) 1998-12-16
US5927709A (en) 1999-07-27
CN1149029A (en) 1997-05-07
DE59600989D1 (en) 1999-01-28
AU6589396A (en) 1997-04-10

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