EP2867148B1 - Rotating device for flat products or for a stack thereof - Google Patents

Rotating device for flat products or for a stack thereof Download PDF

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Publication number
EP2867148B1
EP2867148B1 EP13732886.0A EP13732886A EP2867148B1 EP 2867148 B1 EP2867148 B1 EP 2867148B1 EP 13732886 A EP13732886 A EP 13732886A EP 2867148 B1 EP2867148 B1 EP 2867148B1
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EP
European Patent Office
Prior art keywords
rollers
pairs
transport
speed
product
Prior art date
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Application number
EP13732886.0A
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German (de)
French (fr)
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EP2867148A1 (en
Inventor
Sven STAEHLI
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Kern AG
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Kern AG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
    • B65H5/062—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers between rollers or balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/002—Registering, e.g. orientating, articles; Devices therefor changing orientation of sheet by only controlling movement of the forwarding means, i.e. without the use of stop or register wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/332—Turning, overturning
    • B65H2301/3321—Turning, overturning kinetic therefor
    • B65H2301/33214—Turning, overturning kinetic therefor about an axis perpendicular to the direction of displacement and parallel to the surface of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/332—Turning, overturning
    • B65H2301/3321—Turning, overturning kinetic therefor
    • B65H2301/33216—Turning, overturning kinetic therefor about an axis perpendicular to the direction of displacement and to the surface of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B65H2404/144—Roller pairs with relative movement of the rollers to / from each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/1916—Envelopes and articles of mail
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/66—Envelope filling machines

Definitions

  • the present invention relates to a device for turning stacks of sheet-like or sheet-like products, in particular of documents, letters and the like, according to the preamble of claim 1, and a method for rotating at least one sheet-like or sheet-like product, in particular the rotation of Groups, that is, loose stacks of multiple documents or sheets. More particularly, the present invention relates to a device for rotating documents and letters and the like, for example when being fed into a packaging device, such as for enveloping in envelopes.
  • the documents are usually printed 2-up, ie 2 documents next to each other and processed.
  • the documents usually have the standardized format DIN-A4, Letter or Legal and are portrait (portrait) printed.
  • envelopes are preferably enveloped in envelopes having the opening and thus the envelope flap on the long side.
  • folding automatically causes the short edge of the portrait fed document to become the long edge of the folded size.
  • the portrait with the short edge fed document in the folded Format with the long edge first in the envelope to be packed.
  • the documents must be rotated 90 ° in order to be able to transport and insert them with the long edge (landscape) without deflecting them 90 ° (which means to transport laterally), which would then prevent the processing of folded applications.
  • the direction of rotation to the left or right is usually determined by the position of the window in the envelope.
  • the object of the present invention is to propose another solution for turning sheet-like products, in particular documents individually or as a stack, letters and the like, which allows an increased throughput during the turning process, takes up little space, a variable thickness to be processed and allows the processing of several loosely stacked documents and this without having to move the transport axis permanently.
  • the present invention proposes a solution with which this turning operation can be carried out with significantly higher throughput and lower loads for both the documents and the machine elements.
  • the objects to be rotated are individual documents or groups of documents consisting of several documents stacked on top of each other or, more generally, flat objects. It can also be unfilled envelopes, filled, with open or closed flap elsewhere.
  • the documents or document groups are fed to portrait (longitudinal) of the chain of input modules.
  • the turning device has the task to rotate the documents / groups of documents by 90 ° either clockwise or counterclockwise, so that they can subsequently be fed landscape (transverse) to the inserting module.
  • the rotation landscape - Portrait or documents with edge equality or not rectangular shape is possible.
  • the center of the document is on the same transport axis both before rotation and after rotation. However, during the turning process, the center of the document may travel a curve of any shape.
  • Stopping the documents with subsequent turning in place during start / stop operation takes a relatively long time, so that in the future required cycle times can no longer be achieved become. What is required is therefore a principle that controls the documents within a short time by 90 ° in the desired direction, but without the document permanently moving laterally and optionally also allows the further transport of non-rotating documents.
  • the rotation of the documents is realized by two pairs of rollers rotating at different speeds, thus causing the document clamped between the rollers (or the clamped document group) to rotate.
  • the two pairs of rotating rollers can each have a separate drive. It is proposed that the roller pairs rotate at different speeds in the same direction of transport and that the transport of the documents is not interrupted, ie that there is no start / stop operation, as is partially known from the prior art.
  • Fig. 1 schematically shows a transport device, wherein in the transport direction A, the document 1 is transported, which is initially transported rectangular oriented in the longitudinal direction.
  • the document 1 In order finally to be able to be fed correctly aligned to an inserter unit with envelope 5, the document 1 must be rotated in a rotary device 9 by 90 °. It is advantageous that correctly transported documents 3 can be fed to an envelope 7 without rotation on the same transport device from the very beginning. Schematically, this is in Fig. 1 along the transport direction B, wherein in the region 9 no rotation takes place.
  • rotating and non-rotating objects as desired in the device, that is to say to a rotating one, e.g. also follow an object not to be rotated, which is transported without rotation through the device while the previous one has been rotated.
  • FIG. 2a-2c the rotation process for a document 1 in the rotating device 9 is shown schematically in FIG Fig. 2a before the start of the turning process, in Fig. 2b during the turning process, and in Fig. 2c after completion of the turning process.
  • a pair of rotary rollers can also be braked to zero and the speed of the other pair of rotary rollers is increased by the corresponding amount. In this case, the document is rotated directly around the stationary pair of rollers.
  • FIG. 2a-2c is the turning process with 3 graphics (illustration left) including the schematic course of the velocity profiles (right) shown.
  • the middle curve 16 represents the path of the center M of the document 1. Since the rotation is started before the center of the document has reached the rollers, the document is conveyed out of the center of the transport axis A. Since the rotation is continued after the center of the document has passed the turning rollers, the center is then again shifted, so that at the completion of the turning operation, the center of the document is again as required on the center of the transport axis A. For this reason, the above invention differs from on-the-spot turning. In a turn-by-turn operation with start and stop, when the documents are centrally located on the turntable, the document is rotated about the near-immovable center.
  • the exact time of the speed change can be defined by monitoring the position and speed by means of suitable sensors, preferably light barriers and encoders, as well as corresponding calculations of the control depending on the document length.
  • the two roller pairs 11, 12 and 13, 14 are individually driven by, for example, servomotors 33, 36.
  • the drive can be done for example by means of belts 41, 43, wherein the transmission of the drive is effected on corresponding shafts on which the pairs of rollers are mounted.
  • both the upper and the lower revolving rollers are driven, since a merely revolving counter-pressure roller usually results in shearing / carrying out of the stack.
  • the overdrive from the lower to the upper roller can be done via gears 31, 32. Since both individual documents and groups must be processed to a thickness of a few millimeters, the upper shaft 34, 35 are sprung and can go upwards.
  • the two upper shafts 34 are stored for example in a common bearing block, so that they together after can be pressed up and no skewing can result, which might have a negative effect on the accuracy of the rotational movement.
  • the storage in a common storage block is a possible embodiment.
  • the separate storage is in any case also possible, for example, to be able to process objects of the same thickness on the left and right.
  • Fig. 5a shows two upstream of the rotating conveyor roller pairs 51, 53 and 52, 54, and two of the rotating device 9 downstream pairs of transport rollers 61, 62 and 63.64.
  • the distance of the additional transport rollers should be chosen so that even the smallest format always becomes at least two adjacent pairs of rollers.
  • the upper transport rollers are preferably spring-mounted, so that different thicknesses of the documents and document groups can be processed.
  • the pairs of transport rollers are preferably driven up and down by analogy with the rotary rollers for the aforementioned reasons. If necessary, several such pairs of transport rollers can be used in succession.
  • FIG. 5a shows the additional transport rollers during the turning operation of a document, that is in the raised or lowered state, so that the area between the upper and lower roller pairs is released.
  • Fig. 5b shows the condition when feeding or carrying away the document where the additional Transport roller pairs are closed and thus allow transport of the document.
  • FIG. 5 c shows the pairs of roles of FIGS. 5a and 5b in plan view.
  • the pairs of revolutions 11,12,13,14 have separate axes and left and right separate drives B resp. C.
  • the two upper rollers are on a common shaft and the lower two are on a common shaft.
  • the axle does not have to be continuous, but this is advantageous for the rollers to run equally fast on the left and right.
  • the upper and lower rollers are driven; possibly only the lower ones while the upper ones run free.
  • the roles shown in dashed lines need only for very short to be processed minimum lengths of documents compared to the lengths to be rotated.
  • the shape of the revolving wheels To prevent squeezing or tearing of the paper, the printing area between paper and rolls must be very small. Ideally, this is a point contact, as in Fig. 6 represented, but this is hardly feasible in practice.
  • the material of the revolving roll On the one hand, it must have a high degree of friction with respect to the paper and, on the other hand, allow slight relative rotational movements.
  • Fig. 7 shows a detail of the contact region of the rotary rollers, such as the rotary rollers 11, 12th
  • the present invention can be used at various locations within a document processing machine. As already mentioned, the invention is described, for example, for rotating documents such as sheets, but it is generally possible to speak of flat objects or products. These may in particular also consist of stacked sheets, or of envelopes which are filled or unfilled and have an open or closed flap.
  • the angle of rotation for the documents does not have to be exactly 90 °. Even with angles smaller or greater than 90 °, the desired result can be achieved by subsequently aligning the documents together with an alignment possibility.
  • the device is of course also able to correct distortions of documents or stacks thereof.
  • Suitable guide plates can prevent the corners of the documents from fluttering unintentionally during the turning process.
  • a possible unfolding of the turning device simplifies the removal of a paper jam.
  • the present invention provides a higher achievable throughput. Continuous rotation and no start / stop will make paper handling more gentle and reduce the risk of damage and scrapping or stacking or stacking individual sheets or paper jams.
  • the simple one Mechanical design offers the advantage that the moving components have a low mass. This allows the system to be stopped within a very short time to respond to influences of subsequent systems. By avoiding start / stop processes, the machine components are spared and less power is required. The device requires little space and is able to turn especially controlled stacked products.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zum Drehen von Stapeln von blatt- oder folienartigen Erzeugnissen, wie insbesondere von Dokumenten, Briefen und dergleichen, gemäss dem Oberbegriff nach Anspruch 1, sowie ein Verfahren zum Drehen mindestens eines blatt- oder folienartigen Erzeugnisses, insbesondere das Drehen von Gruppen, das heisst losen Stapeln von mehreren Dokumenten oder Blättern. Im Speziellen betrifft die vorliegende Erfindung eine Vorrichtung zum Drehen von Dokumenten und Briefen und dergleichen, beispielsweise bei der Zuführung in eine Verpackungseinrichtung, wie zum Kuvertieren in Kuverts.The present invention relates to a device for turning stacks of sheet-like or sheet-like products, in particular of documents, letters and the like, according to the preamble of claim 1, and a method for rotating at least one sheet-like or sheet-like product, in particular the rotation of Groups, that is, loose stacks of multiple documents or sheets. More particularly, the present invention relates to a device for rotating documents and letters and the like, for example when being fed into a packaging device, such as for enveloping in envelopes.

In der heutigen Kuvertiertechnik werden die Dokumente meist 2-up, das heisst 2 Dokumente nebeneinander gedruckt und verarbeitet. Die Dokumente besitzen meist das standardisierte Format DIN-A4, Letter oder Legal und werden Portrait (hochkant) gedruckt. Andererseits wird in der heutigen Kuvertiertechnik vorzugsweise in Kuverts kuvertiert, die die Öffnung und damit die Kuvertklappe an der langen Seite besitzen. Für die Verarbeitung von Applikationen, bei denen die Dokumente gefalzt werden um in die Kuverts der Formate C5, C6/5 oder ähnlich verpackt zu werden, wird die kurze Kante des Portrait zugeführten Ausgangsdokuments durch das Falzen automatisch zur langen Kante des gefalzten Formats. Somit kann das Portrait mit der kurzen Kante voran zugeführte Dokument im gefalzten Format mit der langen Kante voran ins Kuvert verpackt werden.In today's inserting technology, the documents are usually printed 2-up, ie 2 documents next to each other and processed. The documents usually have the standardized format DIN-A4, Letter or Legal and are portrait (portrait) printed. On the other hand, in today's inserting technique, envelopes are preferably enveloped in envelopes having the opening and thus the envelope flap on the long side. When processing applications where documents are folded to be wrapped in C5, C6 / 5 or similar envelopes, folding automatically causes the short edge of the portrait fed document to become the long edge of the folded size. Thus, the portrait with the short edge fed document in the folded Format with the long edge first in the envelope to be packed.

Sollen nun auf ein und derselben Maschine beispielsweise Portrait zugeführte Dokumente ungefalzt in ein C4-Kuvert verpackt werden, so müssen die Dokumente um 90° gedreht werden, um diese mit der langen Kante voran (Landscape) transportieren und kuvertieren zu können ohne diese 90° umlenken (das heisst seitlich weitertransportieren) zu müssen, was dann die Verarbeitung von gefalzten Applikationen verhindern würde. Die Drehrichtung nach links oder rechts wird meistens bestimmt durch die Lage des Fensters im Kuvert.If, for example, portrait-fed documents are to be packed on a single machine in a C4 envelope, then the documents must be rotated 90 ° in order to be able to transport and insert them with the long edge (landscape) without deflecting them 90 ° (which means to transport laterally), which would then prevent the processing of folded applications. The direction of rotation to the left or right is usually determined by the position of the window in the envelope.

In Patent CA1077534 (Familie: DE2829221A1 / US4155440A ) mit dem Titel "Document Turning Station", wird vorgeschlagen, ein Dokument durch mehrere parallel angeordnete und mit unterschiedlicher Geschwindigkeit drehende Rollen um 90° zu drehen. Die Drehung erfolgt dabei um eine Ecke des Dokumentes. Die Mittelachse in Transportrichtung verschiebt sich also bleibend bei dieser Variante des Drehens.In patent CA1077534 (Family: DE2829221A1 / US4155440A ) entitled "Document Turning Station", it is proposed to rotate a document by 90 ° through a plurality of rollers arranged in parallel and rotating at different speeds. The rotation takes place around a corner of the document. The central axis in the transport direction thus shifts permanently in this variant of the rotation.

In DE 10219569A1 mit dem Titel "Dreheinrichtung einer ID-Karte" wird eine Dreheinrichtung vorgeschlagen, die mittels rotierender Kugeln und einem Anschlag ID-Karten um diesen Anschlag dreht. Dieses Verfahren hat den Nachteil, dass es nur für steife Objekte eingesetzt werden kann; ein einzelnes Dokument würde verbogen und beschädigt, ein Stapel von Dokumenten liesse sich nicht verarbeiten, da er auseinanderrutschen würde. Zudem ist das Verfahren darauf angewiesen das zu drehende Objekt an einer gebogenen Kante entlang zu transportieren, was mit einer Ecke eines Blatts Papier nicht möglich wäre.In DE 10219569A1 with the title "rotating device of an ID card", a rotating device is proposed which rotates by means of rotating balls and a stop ID cards around this stop. This method has the disadvantage that it can only be used for rigid objects; a single document would be bent and damaged, a pile of documents could not be processed because it would slip apart. In addition, the process is on it instructed to transport the object to be rotated along a curved edge, which would not be possible with a corner of a sheet of paper.

In US 5,114,137 mit dem Titel "Right Angle Turn Table and Method" wird eine Dreheinrichtung zum Drehen von Dokumenten mittels zweier mit unterschiedlicher Geschwindigkeit betriebener Transportbänder beschrieben. Nachteilig sind der lange Platzbedarf, die ungenaue Drehung mit anschliessend benötigtem seitlichen Richten, das bei dünnen Blättern oft zum Hochlaufen der Kante und damit zu Störungen führen kann. Weiter kann mit dieser Lösung ein Stapel von Dokumenten nicht verarbeitet werden, da das Dokument lediglich unten auf zwei Bändern aufliegt und oben lediglich von leichten Rollen geführt wird. Zudem würde ein Stapel von Dokumenten beim Auftreffen auf die Anschlagrolle, die die Drehung auslöst, auseinanderrutschen. Weiter birgt der Anschlag, der die Rotation einleitet und um den das Dokument gedreht wird das Risiko der Beschädigung der Blattkante.In US 5,114,137 entitled "Right Angle Turn Table and Method" describes a rotating device for rotating documents by means of two conveyor belts operated at different speeds. Disadvantages are the long space requirement, the inaccurate rotation with subsequently required lateral straightening, which can often lead to run-up of the edge and thus faults in thin sheets. Further, with this solution, a stack of documents can not be processed because the document rests only on the bottom of two bands and above is guided only by light rollers. In addition, a stack of documents would slip apart when hitting the stop roller that triggers the rotation. Further, the stop initiating the rotation and around which the document is rotated carries the risk of damaging the sheet edge.

In DE 102007054822A1 wird eine "Vorrichtung zum Drehen flacher Gegenstände, insbesondere von Faltschachtelzuschnitten" vorgeschlagen. Aufgrund der freien Drehung ist diese nicht geeignet für die Drehung von leichten Blättern Papier, die aufgrund des sehr geringen Eigengewichts unkontrolliert verrutschen würden. Einen Stapel von Blättern zu drehen ist in keiner Weise möglich, da dieser zudem in sich verrutschen würde. Die Einheit benötigt einen grossen Platzbedarf. Das zusätzlich erforderliche Ausrichten der gesamten Einheit, um ein gutes Drehergebnis zu erzielen, erfordert zudem eine grosse Anzahl gleicher zu drehender Objekte für eine Optimierung, während bei den Anforderungen der Aufgabenstellung von Objekt zu Objekt unterschiedliche Dicken und Anzahlen Blätter auftreten können. Weitere Vorrichtungen und Verfahren werden in den Druckschriften WO 2010/029408 A1 und US 5,090,683 offenbart.In DE 102007054822A1 a "device for turning flat objects, in particular of folding box blanks" is proposed. Due to the free rotation this is not suitable for the rotation of light sheets of paper that would slip uncontrollably due to the very low weight. Turning a pile of leaves is in no way possible, as it would also slip into itself. The unit requires a lot of space. In addition, aligning the entire unit to achieve a good rotation result requires a large number of identical objects to be rotated for optimization, while the requirements of the task may vary from object to object for varying thicknesses and numbers of sheets. Other devices and methods are disclosed in the documents WO 2010/029408 A1 and US 5,090,683 disclosed.

Die Aufgabe der vorliegenden Erfindung liegt darin, eine weitere Lösung für das Drehen von blattartigen Erzeugnissen, wie insbesondere Dokumente einzeln oder als Stapel, Briefe und dergleichen, vorzuschlagen, welche eine erhöhte Durchsatzleistung beim Drehvorgang ermöglicht, wenig Platz beansprucht, eine variable zu verarbeitende Dicke sowie die Verarbeitung von mehreren lose gestapelten Dokumenten ermöglicht und dieses ohne die Transportachse bleibend zu verschieben.The object of the present invention is to propose another solution for turning sheet-like products, in particular documents individually or as a stack, letters and the like, which allows an increased throughput during the turning process, takes up little space, a variable thickness to be processed and allows the processing of several loosely stacked documents and this without having to move the transport axis permanently.

Erfindungsgemäss wird eine Vorrichtung gemäss dem Wortlaut nach Anspruch 1 vorgeschlagen, sowie ein Verfahren gemäss dem Wortlaut nach Anspruch 9.According to the invention, a device according to the wording of claim 1 is proposed, as well as a method according to the wording of claim 9.

Die vorliegende Erfindung schlägt eine Lösung vor, mit der dieser Drehvorgang mit deutlich höherer Durchsatzleistung und geringeren Belastungen für sowohl die Dokumente als auch für die Maschinenelemente durchgeführt werden kann. Bei den zu drehenden Objekten handelt es sich um einzelne Dokumente oder Dokumentengruppen aus mehreren übereinander gestapelten Dokumenten oder allgemeiner gesagt flächigen Objekten. Dabei kann es sich andernorts auch um Briefumschläge ungefüllt, gefüllt, mit offener oder geschlossener Klappe handeln. Die Dokumente oder Dokumentengruppen werden Portrait (längs) der Kette der Eingangsmodule zugeführt. Die Drehvorrichtung hat die Aufgabe die Dokumente/Dokumentengruppen um 90° wahlweise im Uhrzeigersinn oder Gegenuhrzeigersinn zu drehen, damit diese anschliessend Landscape (quer) dem Kuvertiermodul zugeführt werden können. Natürlich ist auch die Drehung Landscape - Portrait oder von Dokumenten mit Kantengleichheit oder nicht rechteckiger Form möglich.The present invention proposes a solution with which this turning operation can be carried out with significantly higher throughput and lower loads for both the documents and the machine elements. The objects to be rotated are individual documents or groups of documents consisting of several documents stacked on top of each other or, more generally, flat objects. It can also be unfilled envelopes, filled, with open or closed flap elsewhere. The documents or document groups are fed to portrait (longitudinal) of the chain of input modules. The turning device has the task to rotate the documents / groups of documents by 90 ° either clockwise or counterclockwise, so that they can subsequently be fed landscape (transverse) to the inserting module. Of course, the rotation landscape - Portrait or documents with edge equality or not rectangular shape is possible.

Dokumente, welche bereits in der richtigen Orientierung angeliefert werden, also beispielsweise gefalzte Dokumente, müssen ohne zu drehen durch die Drehvorrichtung transportiert werden können.Documents that are already delivered in the correct orientation, so for example, folded documents must be able to be transported without turning through the rotating device.

Der Mittelpunkt des Dokuments liegt sowohl vor der Drehung als auch nach der Drehung auf derselben Transportachse. Während des Drehvorgangs kann der Mittelpunkt des Dokumentes jedoch eine Kurve beliebiger Form fahren.The center of the document is on the same transport axis both before rotation and after rotation. However, during the turning process, the center of the document may travel a curve of any shape.

Das Stoppen der Dokumente mit anschliessendem Drehen am Ort im Start/Stopp-Betrieb braucht relativ viel Zeit, damit können künftig geforderte Zykluszeiten nicht mehr erreicht werden. Gefordert ist deshalb ein Prinzip, welches die Dokumente innerhalb kurzer Zeit kontrolliert um 90° in die gewünschte Richtung dreht, jedoch ohne dabei das Dokument bleibend seitlich zu verschieben und wahlweise auch den Weitertransport von nicht zu drehenden Dokumenten erlaubt.Stopping the documents with subsequent turning in place during start / stop operation takes a relatively long time, so that in the future required cycle times can no longer be achieved become. What is required is therefore a principle that controls the documents within a short time by 90 ° in the desired direction, but without the document permanently moving laterally and optionally also allows the further transport of non-rotating documents.

Die Drehung der Dokumente wird durch zwei Rollenpaare realisiert, welche mit unterschiedlicher Geschwindigkeit drehen und so das zwischen den Rollen geklemmte Dokument (oder die geklemmte Dokumentengruppe) in eine Drehbewegung versetzen. Die beiden Drehrollenpaare können jeweils über einen separaten Antrieb verfügen.
Vorgeschlagen wird, dass die Rollenpaare mit unterschiedlicher Geschwindigkeit in dieselbe Transportrichtung gerichtet drehen und der Transport der Dokumente nicht unterbrochen wird, d.h. dass kein Start/Stop-Betrieb vorliegt, wie teilweise aus dem Stand der Technik bekannt.The rotation of the documents is realized by two pairs of rollers rotating at different speeds, thus causing the document clamped between the rollers (or the clamped document group) to rotate. The two pairs of rotating rollers can each have a separate drive.
It is proposed that the roller pairs rotate at different speeds in the same direction of transport and that the transport of the documents is not interrupted, ie that there is no start / stop operation, as is partially known from the prior art.

Weitere Ausführungsvarianten der Vorrichtung sowie auch des erfinderischen Verfahrens sind in den abhängigen Ansprüchen charakterisiert.Further variants of the device as well as of the inventive method are characterized in the dependent claims.

Die Erfindung wird nun beispielsweise und unter Bezug auf die beigefügten Figuren näher erläutert.The invention will now be explained in more detail by way of example and with reference to the accompanying drawings.

Dabei zeigen:

Fig. 1
schematisch die Ausrichtung der Dokumente vor und nach der Drehvorrichtung,
Fig. 2a-2c
schematisch den Drehvorgang eines Dokumentes in der erfindungsgemässen Vorrichtung; vor, während und nach dem Drehvorgang,
Fig. 3
in Perspektive den Aufbau einer Drehvorrichtung,
Fig. 4
in Ansicht in Transportrichtung gesehen die Drehvorrichtung, wie dargestellt in Figur 3,
Fig. 5a-c
schematisch vor- und nachgeschaltete Transportrollen während dem Drehvorgang und beim Transportieren von Dokumenten,
Fig. 6
schematisch ein Drehrollenpaar der erfindungsgemässen Vorrichtung, und
Fig. 7
die Drehrollen-Geometrie des Drehrollenpaares aus Figur 6.
Showing:
Fig. 1
schematically the orientation of the documents before and after the rotating device,
Fig. 2a-2c
schematically the rotation of a document in the inventive device; before, during and after the turning process,
Fig. 3
in perspective the construction of a turning device,
Fig. 4
seen in view in the transport direction the rotary device, as shown in FIG. 3 .
Fig. 5a-c
schematically upstream and downstream transport rollers during the turning process and when transporting documents,
Fig. 6
schematically a pair of rotary rollers of the inventive device, and
Fig. 7
the rotary roller geometry of the rotary roller pair FIG. 6 ,

Fig. 1 zeigt schematisch eine Transporteinrichtung, wobei in Transportrichtung A das Dokument 1 transportiert wird, welches zunächst rechteckig in Längsrichtung ausgerichtet transportiert wird. Um nun schlussendlich einer Kuvertiereinheit mit Kuvert 5 korrekt ausgerichtet zugeführt werden zu können, muss das Dokument 1 in einer Drehvorrichtung 9 um 90° gedreht werden. Vorteilhaft ist, dass auf derselben Transporteinrichtung bereits von Anfang an korrekt transportierte Dokumente 3 ohne Drehung einem Kuvert 7 zugeführt werden können. Schematisch ist dies in Fig. 1 entlang der Transportrichtung B dargestellt, wobei im Bereich 9 keine Drehung erfolgt. Fig. 1 schematically shows a transport device, wherein in the transport direction A, the document 1 is transported, which is initially transported rectangular oriented in the longitudinal direction. In order finally to be able to be fed correctly aligned to an inserter unit with envelope 5, the document 1 must be rotated in a rotary device 9 by 90 °. It is advantageous that correctly transported documents 3 can be fed to an envelope 7 without rotation on the same transport device from the very beginning. Schematically, this is in Fig. 1 along the transport direction B, wherein in the region 9 no rotation takes place.

Im Sonderfall ist es auch möglich zu drehende und nicht zu drehende Objekte beliebig wechselnd in der Vorrichtung zu verarbeiten, das heisst auf ein zu drehendes kann z.B. auch ein nicht zu drehendes Objekt folgen, das ohne Drehung durch die Vorrichtung hindurchtransportiert wird, während das vorhergehende gedreht wurde.In a special case, it is also possible to process rotating and non-rotating objects as desired in the device, that is to say to a rotating one, e.g. also follow an object not to be rotated, which is transported without rotation through the device while the previous one has been rotated.

In den Figuren 2a-2c ist der Drehvorgang für ein Dokument 1 in der Drehvorrichtung 9 schematisch dargestellt, in Fig. 2a vor Beginn des Drehvorganges, in Fig. 2b während des Drehvorganges, und in Fig. 2c nach Abschluss des Drehvorganges.In the Figures 2a-2c the rotation process for a document 1 in the rotating device 9 is shown schematically in FIG Fig. 2a before the start of the turning process, in Fig. 2b during the turning process, and in Fig. 2c after completion of the turning process.

Zur Übernahme der Dokumente 1 drehen beide Rollenpaare 11, 12 und 13, 14 der Drehvorrichtung 9 mit derselben Geschwindigkeit. Entscheidend ist, dass die Geschwindigkeiten der beiden Drehrollenpaare zum richtigen Zeitpunkt erhöht resp. reduziert werden, um die Drehbewegung zu starten. Je nach gewünschter Drehrichtung wird die Geschwindigkeit des linken Drehrollenpaares 11, 12 reduziert und diejenige des rechten Drehrollenpaares 13, 14 erhöht (in Transportrichtung; für Drehung im Gegenuhrzeigersinn) oder umgekehrt (Uhrzeigersinn). Ebenso entscheidend ist, dass die beiden Geschwindigkeiten zum richtigen Zeitpunkt wieder angeglichen werden, so dass das Dokument exakt 90° gedreht gerade weitertransportiert wird. Diese Geschwindigkeitsanpassung zum richtigen Zeitpunkt bewirkt, dass symmetrisch zugeführte Dokumente auch nach der Drehung noch symmetrisch unter den Drehrollen liegen. Der Vorteil gegenüber einer Drehung im Start/Stopp-Betrieb, wo die Dokumente gestoppt und am Ort gedreht werden, ist, dass die Drehbewegung fliessend während dem Transport geschieht. Dadurch lässt sich das zeitraubende Start/Stopp vermeiden. Mindestens ebenso wichtig ist, dass durch die fliessende Drehbewegung der Dokumentenstapel nicht verrutscht bzw. verschuppt (verrutschen von einzelnen Blättern im Stapel) im Gegensatz zu einer Start-/Stopp-Bewegung, wo dies kaum zu vermeiden ist. Durch die rechtzeitige und exakte Änderung der Geschwindigkeit der beiden Drehrollenantriebe wird ausserdem sichergestellt, dass das Dokument auch nach der Drehbewegung noch symmetrisch unter den Drehrollen liegt und symmetrisch aus der Drehvorrichtung heraustransportiert wird. Anschliessend wird das gedrehte Dokument von zwei weiteren, gleich schnell drehenden Transportrollen übernommen und weg transportiert, wie anschliessend unter Bezug auf Fig. 5 näher erläutert.To take over the documents 1 rotate both pairs of rollers 11, 12 and 13, 14 of the rotating device 9 at the same speed. The decisive factor is that the speeds of the two pairs of rotating rollers increased at the right time, respectively. be reduced to start the rotation. Depending on the desired direction of rotation, the speed of the left pair of rotary rollers 11, 12 is reduced and that of the right pair of rotary rollers 13, 14 is increased (in the transport direction, for counterclockwise rotation) or vice versa (clockwise). Equally crucial is that the two speeds are readjusted at the right time so that the Document rotated exactly 90 ° just transported. This speed adjustment at the right time causes symmetrically fed documents to remain symmetrically under the rollers even after rotation. The advantage over rotation in start / stop operation, where the documents are stopped and rotated in place, is that the rotational movement is smooth during transport. This avoids the time-consuming start / stop. It is at least equally important that the document pile does not slip or slip due to the fluid rotational movement (slipping of individual sheets in the stack), in contrast to a start / stop movement, where this can hardly be avoided. Due to the timely and exact change in the speed of the two rotary roller drives also ensures that the document is still symmetrically under the rotary rollers after the rotational movement and is symmetrically transported out of the rotating device. Subsequently, the rotated document is taken over by two further, equally fast rotating transport rollers and transported away, as subsequently with reference to Fig. 5 explained in more detail.

Im Extremfall kann ein Drehrollenpaar auch auf null abgebremst werden und die Geschwindigkeit des anderen Drehrollenpaares wird um den entsprechenden Betrag erhöht. In diesem Fall wird das Dokument direkt um das stehende Rollenpaar gedreht.In extreme cases, a pair of rotary rollers can also be braked to zero and the speed of the other pair of rotary rollers is increased by the corresponding amount. In this case, the document is rotated directly around the stationary pair of rollers.

In den Figuren 2a-2c ist der Drehvorgang mit 3 Grafiken (Darstellung links) inklusive dem schematischen Verlauf der Geschwindigkeitsprofile (Darstellung rechts) dargestellt. Die mittlere Kurve 16 stellt den Weg des Mittelpunkts M des Dokuments 1 dar. Da mit dem Drehen begonnen wird, bevor der Mittelpunkt des Dokuments die Rollen erreicht hat wird das Dokument aus der Mitte der Transportachse A herausbefördert. Da die Drehung weitergeführt wird, nachdem der Mittelpunkt des Dokuments die Drehrollen passiert hat, wird der Mittelpunkt anschliessend wieder verschoben, so dass bei Abschluss des Drehvorgangs der Mittelpunkt des Dokuments wieder wie erforderlich auf der Mitte der Transportachse A liegt. Aus diesem Grund unterscheidet sich die vorstehende Erfindung vom Drehen am Ort. Bei einem Betrieb gemäss mit Drehen am Ort mit Start und Stopp, wenn die Dokumente zentral auf der Dreheinheit liegen, wird um den nahezu unbeweglichen Mittelpunkt des Dokuments gedreht.In the Figures 2a-2c is the turning process with 3 graphics (illustration left) including the schematic course of the velocity profiles (right) shown. The middle curve 16 represents the path of the center M of the document 1. Since the rotation is started before the center of the document has reached the rollers, the document is conveyed out of the center of the transport axis A. Since the rotation is continued after the center of the document has passed the turning rollers, the center is then again shifted, so that at the completion of the turning operation, the center of the document is again as required on the center of the transport axis A. For this reason, the above invention differs from on-the-spot turning. In a turn-by-turn operation with start and stop, when the documents are centrally located on the turntable, the document is rotated about the near-immovable center.

In der rechten Darstellung des schematischen Verlaufs der Geschwindigkeitsprofile der beiden Drehrollenpaare 11, 12 und 13, 14 ist der Zeitpunkt, zu dem sich der Mittelpunkt des Dokuments D1 an der in der linken Darstellung gezeichneten Position befindet, schematisch als Strich 21 dargestellt. In Fig. 2a befindet sich das Dokument am Anfang der Drehung, in Fig. 2b in Drehungsmitte (bezeichnet mit 23), und in Fig. 2c nach vollendeter Drehung (bezeichnet mit 25).In the right-hand illustration of the schematic profile of the velocity profiles of the two pairs of revolving rollers 11, 12 and 13, 14, the point in time at which the center of the document D1 is located at the position shown in the left-hand representation is shown schematically as a dash 21. In Fig. 2a the document is at the beginning of the rotation, in Fig. 2b in center of rotation (denoted by 23), and in Fig. 2c after completion of rotation (indicated at 25).

Der genaue Zeitpunkt der Geschwindigkeitsänderung kann durch Überwachung der Position und Geschwindigkeit mittels geeigneter Sensoren, vorzugsweise Lichtschranken und Drehgeber sowie entsprechende Berechnungen der Steuerung abhängig von der Dokumentenlänge definiert werden.The exact time of the speed change can be defined by monitoring the position and speed by means of suitable sensors, preferably light barriers and encoders, as well as corresponding calculations of the control depending on the document length.

In den Figuren 3 und 4 ist der Aufbau einer Drehvorrichtung in Perspektive und in Frontansicht schematisch dargestellt. Gemäss einer Ausführungsvariante sind die beiden Rollenpaare 11, 12 sowie 13, 14 individuell durch beispielsweise Servomotoren 33, 36 angetrieben. Der Antrieb kann beispielsweise mittels Riemen 41, 43 erfolgen, wobei die Übertragung des Antriebs auf entsprechende Wellen erfolgt, an welchen die Rollenpaare gelagert sind.
Um die sichere Verarbeitung ganzer Gruppen (Stapel) von Dokumenten sicherzustellen sind vorzugsweise sowohl die oberen und die unteren Drehrollen angetrieben, da eine lediglich mitlaufende Gegendruckrolle meist zum Verschuppen / Verrichten des Stapels führt.In the Figures 3 and 4 the construction of a rotating device in perspective and in front view is shown schematically. According to one embodiment variant, the two roller pairs 11, 12 and 13, 14 are individually driven by, for example, servomotors 33, 36. The drive can be done for example by means of belts 41, 43, wherein the transmission of the drive is effected on corresponding shafts on which the pairs of rollers are mounted.
In order to ensure the secure processing of entire groups (stacks) of documents, preferably both the upper and the lower revolving rollers are driven, since a merely revolving counter-pressure roller usually results in shearing / carrying out of the stack.

Der Übertrieb von der unteren auf die obere Rolle kann über Zahnräder 31, 32 erfolgen. Da sowohl einzelne Dokumente als auch Gruppen bis einige Millimeter Dicke verarbeitet werden müssen, sind die oberen Welle 34, 35 gefedert und können nach oben weichen.The overdrive from the lower to the upper roller can be done via gears 31, 32. Since both individual documents and groups must be processed to a thickness of a few millimeters, the upper shaft 34, 35 are sprung and can go upwards.

Die beiden oberen Wellen 34 sind beispielsweise in einem gemeinsamen Lagerklotz gelagert, damit sie zusammen nach oben gedrückt werden und sich keine Schrägstellungen ergeben können, welche sich u.U. negativ auf die Genauigkeit der Drehbewegung auswirken würden.The two upper shafts 34 are stored for example in a common bearing block, so that they together after can be pressed up and no skewing can result, which might have a negative effect on the accuracy of the rotational movement.

Anstelle der Zahnräder zum Übertrieb der gefederten Walzen sind auch Lösungen mittels Zahnriemen oder anderen bekannten Maschinenelementen denkbar, ebenso wie der Einsatz zweier getrennter Antriebe für die obere und untere Antriebsrolle.Instead of the gears for overdriving the sprung rollers and solutions by means of toothed belt or other known machine elements are conceivable, as well as the use of two separate drives for the upper and lower drive roller.

Die Lagerung in einem gemeinsamen Lagerklotz ist eine mögliche Ausführungsform. Die getrennte Lagerung ist in jedem Fall auch möglich, um zum Beispiel links und rechts nicht gleich dicke Objekte verarbeiten zu können.The storage in a common storage block is a possible embodiment. The separate storage is in any case also possible, for example, to be able to process objects of the same thickness on the left and right.

Weitere Ausführungsformen wie elastische Rollen statt Federung oder der gänzliche Verzicht auf eine Federung bei Verarbeitung lediglich dünner Objekte sind denkbar.Other embodiments such as elastic rollers instead of suspension or the complete abandonment of suspension when processing only thin objects are conceivable.

Neben der genannten Form einer typischen Antriebsrolle ist es selbstverständlich auch möglich kugelförmige Antriebsrollen oder ähnlich zu verwenden.In addition to the aforementioned form of a typical drive roller, it is of course also possible to use spherical drive rollers or the like.

Damit auch kleinere Dokument-Formate durch die Drehvorrichtung hindurch transportiert werden können, können beispielsweise vor und nach den Drehrollen zusätzliche Transportrollen platziert werden, wie in Fig. 5a, 5b und 5c schematisch dargestellt. Fig. 5a zeigt zwei zur Drehvorrichtung vorgeschaltete Transportrollenpaare 51, 53 und 52,54, sowie zwei der Drehvorrichtung 9 nachgeschaltete Transportrollenpaare 61, 62 und 63,64. Der Abstand der zusätzlichen Transportrollen ist so zu wählen, dass auch das kleinste Format immer mindestens von zwei nebeneinander liegenden Rollenpaaren wird. Die oberen Transportrollen sind vorzugsweise gefedert gelagert, so dass unterschiedliche Dicken der Dokumente und Dokumentengruppen verarbeitet werden können. Die Transportrollenpaare sind analog den Drehrollen aus den vorgenannten Gründen vorzugsweise oben und unten angetrieben. Bei Bedarf können mehrere solche Transportrollenpaare hintereinander eingesetzt werden.Thus, even smaller document formats can be transported through the rotating device, for example, before and after the rollers additional transport rollers can be placed, as in Fig. 5a, 5b and 5c shown schematically. Fig. 5a shows two upstream of the rotating conveyor roller pairs 51, 53 and 52, 54, and two of the rotating device 9 downstream pairs of transport rollers 61, 62 and 63.64. The distance of the additional transport rollers should be chosen so that even the smallest format always becomes at least two adjacent pairs of rollers. The upper transport rollers are preferably spring-mounted, so that different thicknesses of the documents and document groups can be processed. The pairs of transport rollers are preferably driven up and down by analogy with the rotary rollers for the aforementioned reasons. If necessary, several such pairs of transport rollers can be used in succession.

Diese zusätzlichen Transportrollen müssen jedoch für den Drehvorgang abgehoben (und idealerweise auch ausgekuppelt) werden, damit zu drehende Dokumente nur von den beiden Drehrollenpaaren geklemmt und angetrieben werden. Denkbar ist auch, dass die unteren Transportrollen noch leicht abgesenkt werden um Kontakt mit den drehenden Dokumenten sicher zu vermeiden. Das Abheben kann in geeigneter Form erfolgen mittels Magneten, Zylindern, Hebeln, Motoren etc. Figur 5a zeigt die zusätzlichen Transportrollen während dem Drehvorgang eines Dokumentes, das heisst in abgehobenem oder abgesenktem Zustand, so dass der Bereich zwischen den oberen und unteren Rollenpaaren freigegeben ist. Demgegenüber zeigt Fig. 5b den Zustand beim Zuführen oder Wegtransportieren des Dokumentes, wo die zusätzlichen Transportrollenpaare geschlossen sind und somit einen Transport des Dokumentes ermöglichen. Fig. 5b kann aber auch diejenige Situation darstellen, wo alle Transportrollen im Eingriff zum Transportieren von kleineren, nicht zu drehenden Dokumenten sind. Figur 5 c zeigt die Rollenpaare der Figuren 5a und 5b in Draufsicht. Die Drehrollpaare 11,12,13,14 haben getrennte Achsen und links und rechts getrennte Antriebe B resp. C. Bei den Transportrollenpaaren befinden sich die beiden oberen Rollen auf einer gemeinsamen Welle und die beiden unteren auf einer gemeinsamen Welle. Die Achse muss nicht durchgehend sein, dies ist aber vorteilhaft, damit die Rollen links und rechts gleich schnell laufen. Idealerweise sind die oberen und unteren Rollen angetrieben; eventuell nur die unteren während die oberen frei mitlaufen. Die gestrichelt dargestellten Rollen braucht es nur bei sehr kurzen zu verarbeitenden Minimallängen der Dokumente im Vergleich zu den zu drehenden Längen.However, these additional transport rollers must be lifted for the turning process (and ideally also disengaged) so that documents to be rotated are clamped and driven only by the two pairs of rotating rollers. It is also conceivable that the lower transport rollers are still slightly lowered to avoid contact with the rotating documents safely. The lifting can be done in a suitable form by means of magnets, cylinders, levers, motors etc. FIG. 5a shows the additional transport rollers during the turning operation of a document, that is in the raised or lowered state, so that the area between the upper and lower roller pairs is released. In contrast, shows Fig. 5b the condition when feeding or carrying away the document where the additional Transport roller pairs are closed and thus allow transport of the document. Fig. 5b but can also represent the situation where all transport rollers are engaged to transport smaller, not to be rotated documents. FIG. 5 c shows the pairs of roles of FIGS. 5a and 5b in plan view. The pairs of revolutions 11,12,13,14 have separate axes and left and right separate drives B resp. C. For the pairs of transport rollers, the two upper rollers are on a common shaft and the lower two are on a common shaft. The axle does not have to be continuous, but this is advantageous for the rollers to run equally fast on the left and right. Ideally, the upper and lower rollers are driven; possibly only the lower ones while the upper ones run free. The roles shown in dashed lines need only for very short to be processed minimum lengths of documents compared to the lengths to be rotated.

Bei Verarbeitung von lediglich genügend langen Objekten können die zusätzlichen für den Drehvorgang abzuhebenden Rollen entfallen.When processing only sufficiently long objects, the additional roles to be lifted for the turning process can be omitted.

Von Bedeutung ist die Form der Drehrollen. Um ein Quetschen oder Reissen des Papiers zu verhindern, muss die Druckfläche zwischen Papier und Drehrollen sehr klein sein. Idealerweise handelt es sich dabei um einen punktförmigen Kontakt, wie in Fig. 6 dargestellt, was jedoch in der Praxis kaum realisierbar ist. Der Werkstoff der Drehrolle muss einerseits eine hohe Friktion gegenüber dem Papier haben, andererseits leichte Relativdrehbewegungen zulassen.Of importance is the shape of the revolving wheels. To prevent squeezing or tearing of the paper, the printing area between paper and rolls must be very small. Ideally, this is a point contact, as in Fig. 6 represented, but this is hardly feasible in practice. The material of the revolving roll On the one hand, it must have a high degree of friction with respect to the paper and, on the other hand, allow slight relative rotational movements.

Fig. 7 zeigt ausschnittsweise den Kontaktbereich der Drehrollen, wie beispielsweise der Drehrollen 11, 12. Fig. 7 shows a detail of the contact region of the rotary rollers, such as the rotary rollers 11, 12th

Bei den Darstellungen in den Figuren 1 bis 7 handelt es sich selbstverständlich nur um Beispiele zur besseren Erläuterung der vorliegenden Erfindung. Insbesondere die für die Rollen verwendeten Materialien sind nicht primär Bestandteil der vorliegenden Erfindung und Rollen aus Gummi, Polyurethan, anderen geeigneten Polymer-Materialien, Beschichtungen mittels korunder Oberflächen und möglicherweise sogar überraschenderweise glatten Oberflächen, wenn genügend Druck ausgeübt wird, sind möglich.In the representations in the FIGS. 1 to 7 Of course, these are only examples to better explain the present invention. In particular, the materials used for the rolls are not primarily part of the present invention and rolls of rubber, polyurethane, other suitable polymeric materials, coatings by means of corundum surfaces and possibly even surprisingly smooth surfaces, if sufficient pressure is applied, are possible.

Die vorliegende Erfindung kann an verschiedensten Orten innerhalb einer Dokumentenverarbeitungsmaschine eingesetzt werden. Wie bereits eingangs erwähnt, ist die Erfindung beispielsweise für das Drehen von Dokumenten wie Blättern beschrieben, doch kann allgemein von flächigen Objekten oder Erzeugnissen gesprochen werden. Diese können insbesondere auch aus gestapelten Blättern, oder aus Briefumschlägen, die gefüllt oder ungefüllt sind und eine offene oder geschlossene Klappe besitzen, bestehen.The present invention can be used at various locations within a document processing machine. As already mentioned, the invention is described, for example, for rotating documents such as sheets, but it is generally possible to speak of flat objects or products. These may in particular also consist of stacked sheets, or of envelopes which are filled or unfilled and have an open or closed flap.

Die Verarbeitung unterschiedlicher Dokumentengrössen ist eine vorteilhafte Eigenschaft und daher ist die Ausführungsvariante mit beispielsweise abhebbaren Rollen vor und nach der eigentlichen Drehvorrichtung eine mögliche Ausführungsform.The processing of different document sizes is an advantageous feature and therefore the Embodiment with, for example, liftable roles before and after the actual rotating device a possible embodiment.

Der Drehwinkel für die Dokumente muss nicht exakt 90° betragen. Auch mit Winkeln kleiner oder grösser 90° kann durch anschliessendes Ausrichten der Dokumente zusammen mit einer Ausrichtmöglichkeit das gewünschte Ergebnis erzielt werden.The angle of rotation for the documents does not have to be exactly 90 °. Even with angles smaller or greater than 90 °, the desired result can be achieved by subsequently aligning the documents together with an alignment possibility.

Durch ihre Ausgestaltung ist die Vorrichtung natürlich auch in der Lage Verdrehungen von Dokumenten oder Stapeln davon zu korrigieren.By its design, the device is of course also able to correct distortions of documents or stacks thereof.

Durch geeignete Führungsbleche kann verhindert werden, dass die Ecken der Dokumente während des Drehvorganges ungewollt flattern.Suitable guide plates can prevent the corners of the documents from fluttering unintentionally during the turning process.

Ein mögliches Aufklappen der Drehvorrichtung vereinfacht die Entfernung eines Papierstaus.A possible unfolding of the turning device simplifies the removal of a paper jam.

Gegenüber den bekannten Verfahren zum Drehen von Dokumenten bietet die vorliegende Erfindung einen höheren erreichbaren Durchsatz. Durch die kontinuierliche Bewegung der Drehung und den Verzicht auf Start/Stopp wird der Papiertransport schonender und die Gefahr von Beschädigungen und dem Verschuppen oder Verrichten des Stapels oder einzelner Blätter darin oder Papierstaus sinkt. Der einfache mechanische Aufbau bietet den Vorteil, dass die beweglichen Komponenten eine geringe Masse habe. Dadurch kann das System innerhalb sehr kurzer Zeit gestoppt werden, um auf Einflüsse nachfolgender Systeme zu reagieren. Durch die Vermeidung von Start/Stopp Prozessen werden die Maschinenelemente geschont und es ist weniger Leistung erforderlich. Die Vorrichtung benötigt wenig Platz und ist in der Lage insbesondere auch gestapelte Erzeugnisse kontrolliert zu drehen.Compared to the known methods for rotating documents, the present invention provides a higher achievable throughput. Continuous rotation and no start / stop will make paper handling more gentle and reduce the risk of damage and scrapping or stacking or stacking individual sheets or paper jams. The simple one Mechanical design offers the advantage that the moving components have a low mass. This allows the system to be stopped within a very short time to respond to influences of subsequent systems. By avoiding start / stop processes, the machine components are spared and less power is required. The device requires little space and is able to turn especially controlled stacked products.

Claims (15)

  1. Device for rotating flat sheet-like or film-like products or a stack thereof, wherein at least two pairs of drive rollers (11, 12; 13, 14) arranged next to one another at a distance from one another are provided for transporting the products (1), the driving speed of which can be varied such that the two pairs of rollers can be operated at different speeds, directed in the same transport direction, characterized in that the position of the product can be detected by means of sensors which are connected to the drive or drives of the pairs of rollers, and both the upper and lower rollers of the drive are drivable so as to increase the speed of one pair of rollers and reduce the speed of the other pair of rollers, thus rotating the product by 90° without interrupting transport and the center point (M) of the document lies on the same transport axis (A) both before rotation and after rotation.
  2. Device according to claim 1, characterized in that on at least one pair of rollers the speed can be reduced relative to the transport speed.
  3. Device according to claim 1, characterized in that the speed of the one pair of rollers can be reduced and that of the other can be increased.
  4. Device according to one of claims 1 to 3, characterized in that the pairs of rollers have separate drives (33, 35).
  5. Device according to one of claims 1 to 4, characterized in that the product is fed to the pairs of rollers symmetrically to the pairs of rollers.
  6. Device according to one of claims 1 to 5, characterized in that the sensors are light barriers or rotary encoders.
  7. Device according to one of claims 1 to 6, characterized in that further pairs of transport rollers (51, 52; 53, 54/61, 62; 63, 64) are provided before and/or after the pairs of rollers, wherein the rollers are optionally designed such that they can be separated from one another in order to enable a free rotation during the rotating process of the product.
  8. Device according to one of claims 1 to 7, characterized in that the device optionally enables a rotating process or a straight transport of the products without rotation.
  9. Method for rotating at least one sheet-like or film-like product or a stack thereof, wherein the product is fed to two pairs of drive rollers arranged at a distance from one another, wherein both the upper and the lower drive rollers of the drive are driven, characterized in that the position for controlling the speed of the two pairs of rollers is detected by means of sensors and, after the product has been engaged by the two pairs of rollers, the speed of at least one of the pairs of rollers is changed in such a way that the two pairs of rollers are operated at different speed, directed in the same direction of transport, and the product is rotated by 90° without interrupting the transport until the desired rotation is completed, whereupon the speed of the two pairs of rollers is set the same again for the further transport of the product, wherein the control of the speed of the two pairs of rollers is carried out in such a way that the speed of the one pair of rollers is increased and the speed of the other pair of rollers is reduced, and the center point of the document lies on the same transport axis both before the rotation and after the rotation.
  10. Method according to claim 9, characterized in that the speed of the one pair of rollers is increased during the rotating process and that of the other is reduced.
  11. Method according to one of claims 9 or 10, characterized in that the speed and length of the product is detected by means of sensors to control the speed of the two pairs of rollers.
  12. Method according to one of claims 9 to 11, characterized in that the product is fed symmetrically to the transport axis before the rotation device and discharged symmetrically to the transport axis after the rotation device.
  13. Method according to one of claims 9 to 12, characterized in that further pairs of transport rollers can be operated upstream and/or downstream of the two pairs of rollers in such a way that the rollers of the further pairs of transport rollers are separated from one another during the rotating process of the product in order to enable the product to slide through the further transport rollers during the rotating process.
  14. Method according to one of claims 9 to 13, characterized in that the product may be optionally rotated or be transported in a non-rotated manner.
  15. Method according to one of claims 9 to 14, characterized in that the product is a rectangular document which is symmetrically fed to the pairs of rollers and the position of the center point of the document is changed in such a way that a rotation process changes the center point movement with respect to the axis of symmetry of the direction of movement of the document until the center point comes to lie again on the axis of symmetry, whereupon the rotation movement is completed and the document is transported further.
EP13732886.0A 2012-06-29 2013-06-25 Rotating device for flat products or for a stack thereof Active EP2867148B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00919/12A CH706657A1 (en) 2012-06-29 2012-06-29 Device for turning flat sheet- or film-like products or a batch.
PCT/EP2013/063232 WO2014001307A1 (en) 2012-06-29 2013-06-25 Rotating device for flat products or for a stack thereof

Publications (2)

Publication Number Publication Date
EP2867148A1 EP2867148A1 (en) 2015-05-06
EP2867148B1 true EP2867148B1 (en) 2019-04-10

Family

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Application Number Title Priority Date Filing Date
EP13732886.0A Active EP2867148B1 (en) 2012-06-29 2013-06-25 Rotating device for flat products or for a stack thereof

Country Status (5)

Country Link
US (1) US9555991B2 (en)
EP (1) EP2867148B1 (en)
CH (1) CH706657A1 (en)
SG (1) SG11201408727SA (en)
WO (1) WO2014001307A1 (en)

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US10556426B2 (en) * 2017-07-04 2020-02-11 Canon Finetech Nisca Inc. Printing apparatus
JP2022112790A (en) * 2021-01-22 2022-08-03 株式会社Pfu Medium conveying device, control method, and control program
CN115892594B (en) * 2022-12-23 2024-02-06 河北卓正建筑材料制造有限公司 Bridge-cutoff aluminum door and window overturning and laminating device and method

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Also Published As

Publication number Publication date
US9555991B2 (en) 2017-01-31
WO2014001307A1 (en) 2014-01-03
SG11201408727SA (en) 2015-02-27
CH706657A1 (en) 2013-12-31
EP2867148A1 (en) 2015-05-06
US20150246786A1 (en) 2015-09-03

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