EP1241119B1 - Device for conveying sheets - Google Patents
Device for conveying sheets Download PDFInfo
- Publication number
- EP1241119B1 EP1241119B1 EP02002594A EP02002594A EP1241119B1 EP 1241119 B1 EP1241119 B1 EP 1241119B1 EP 02002594 A EP02002594 A EP 02002594A EP 02002594 A EP02002594 A EP 02002594A EP 1241119 B1 EP1241119 B1 EP 1241119B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transport
- rollers
- sheets
- belts
- conveyor belt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- 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
- B65H5/02—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains
- B65H5/021—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts
- B65H5/023—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts between a pair of belts forming a transport nip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2401/00—Materials used for the handling apparatus or parts thereof; Properties thereof
- B65H2401/10—Materials
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- 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
- B65H2404/20—Belts
- B65H2404/22—Cross section profile
- B65H2404/222—Flat belt
- B65H2404/2221—Flat belt wider than width of transported material
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- 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
- B65H2404/20—Belts
- B65H2404/23—Belts with auxiliary handling means
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- 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
- B65H2404/20—Belts
- B65H2404/25—Driving or guiding arrangements
- B65H2404/255—Arrangement for tensioning
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- 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
- B65H2404/20—Belts
- B65H2404/26—Particular arrangement of belt, or belts
- B65H2404/261—Arrangement of belts, or belt(s) / roller(s) facing each other for forming a transport nip
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- 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
- B65H2404/50—Surface of the elements in contact with the forwarded or guided material
- B65H2404/53—Surface of the elements in contact with the forwarded or guided material with particular mechanical, physical properties
- B65H2404/531—Surface of the elements in contact with the forwarded or guided material with particular mechanical, physical properties particular coefficient of friction
- B65H2404/5311—Surface with different coefficients of friction
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- 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
- B65H2404/50—Surface of the elements in contact with the forwarded or guided material
- B65H2404/55—Built-up surface, e.g. arrangement for attaching the surface to the forwarding or guiding element
- B65H2404/551—Non permanent attachment, i.e. allowing interchange ability of the surface
- B65H2404/5513—Strip-shaped built-up surface
Definitions
- the invention relates to a device for conveying sheets by a printing machine according to the preamble of claim 1.
- sheets of various types, sizes and features are transported through the areas of the printing machine from sheet supplies to ejection containers of the printed fabric.
- the sheet lays considerable transport paths, in the course of which printing takes place, and is essentially moved by conveyor belts or belts, which are stretched around moving and partly driven rollers.
- An essential criterion in the transport of the sheet is a smooth and flawless process, reducing errors due to displacements or slippage of individual sheets or sheets of the sheet, i. the position and orientation of the sheet on the conveyor belt or belt.
- the safe transport of the sheet is particularly at small sheet sizes especially at the transfer areas between two belt systems and changes in direction of a bow path, such as the transition from a vertical to a horizontal bow path endangered.
- One way to secure the transport path of the sheet is to guide the sheet on as long as possible on the tension rollers, i. to increase the number of tension rollers in the printing machine.
- a second possibility is to increase the coefficient of friction of the surfaces of the conveyor belts and thereby increase the security of the transport of the sheet.
- the second approach is disclosed in WO96 / 10778, which describes an improved release coating for use with a variety of elastomeric structures, such as press rolls and belts.
- the coating consists of a thin expanded polytetrafluoroethylene skin attached to a substrate with a permeable surface and an impermeable surface exposed as a contact surface.
- This use of two surfaces on a single thin coating on the one hand provides excellent bonding with the substrate material, eg, a silicon elastomer layer, and is for second insensitive to wear and insensitive to chemical influences.
- a disadvantage of the first option is, inter alia, the higher material and component requirements and consequently a higher maintenance susceptibility.
- the second possibility represents a multi-layered layer structure, the production of which requires a large number of work steps. The same is also known from JP 60 023 233 A.
- GB 2 170 165 A discloses conveyor for sheets with conveyor belts, which are pressed together by means of rollers.
- JP 60012437A, JP 010113340A, JP 11091975A and JP 200019 1175A disclose conveyor belts with contact surfaces which are strip-shaped or separately formed.
- the object of the invention is to provide a device for conveying sheets by a printing machine that ensures the safe transport of the sheet exactly in the intended transport path with low material costs in a simple manner. This object is achieved by the invention with the features of claim 1.
- the surface coating consists of silicone.
- This cleaning device may contain employed cleaning rollers.
- at least one of the existing rollers, which press the conveyor belts against each other along the conveying path may be formed as a cleaning roller.
- the surface coating of the contact surfaces on a surface that is dirt-repellent The sheet is centrally held and guided in the conveying direction, wherein for supporting the overhanging conveyor belts edges guide elements are provided, on which the sheet rests horizontally to the ground during Fördems.
- each module of the overhead conveyor belt is designed to be shorter than the conveyor belt below, the number of the upper conveyor belt associated roles by one compared to the number of the underlying belt conveyor rollers assigned is reduced, and wherein the pulleys of the overhead conveyor belt act as tension rollers and are each arranged between the pulley of the underlying conveyor belt and the pulley of the lower conveyor belt adjacent role.
- FIGS. 1 - 2 In the following the invention with reference to FIGS. 1 - 2 is described in detail by way of example.
- FIG. 1 shows by way of example a section of a conveyor belt 10 and a section of another conveyor belt 15 of a printing machine.
- On the conveyor belt 15 is shown in sections on the hatched areas on this side of the conveyor belt 15, a surface coating 20 applied from a material having a high coefficient of friction with respect to the material of the sheet.
- the conveyor belt 15 transports on its upper side sheet 5 in the direction of arrow a.
- a roller 30 is arranged, above the portion of the conveyor belt 15, another endless conveyor belt 10 and above this another roller 30 is arranged.
- Below the upper roller 30, a portion of the conveyor belt 10 is shown in Figure 1, this moves in the direction of arrow a, ie in the same direction as the section of the conveyor belt 15.
- Both conveyor belts 10, 15 are endless.
- the force F 1 act from the contact pressure of the lower roller 30 from below and the force F 2 from the contact pressure of the upper roller 30 from above.
- the conveyor belts 10, 15 by means of a motor (not shown) are driven in the directions of the curved arrows b , wherein the lower and upper rollers 30 are in opposite directions.
- the rollers 30 are shown spaced apart in this illustration of FIG. 1 for clarity, in operation, however, the rollers 30 are arranged adjacent, between which the conveyor belt 10, 15 are pressed. From the above description it is clear that the sheet 5 between the rollers 30 at the nip, ie the respective bearing surface of a roll, a narrow surface perpendicular to the transport direction, is clamped.
- the rollers 30 are shown in Figure 1 for illustrative purposes in side view as circles, but these usually have about a length corresponding to the width of the conveyor belt 10, 15 plus a designated as a projection width. To ensure the running safety, the rollers 30 are formed spherical, the circumference of the rollers 30 is greater in the center than at the edge.
- the conveyor belts 10, 15 are moved with the sheet 5 in the direction indicated by the straight directional arrow a direction.
- the sheet 5 is in this case held by friction forces on the conveyor belt 10, 15 and secured against slipping on the conveyor belt 10, 15 substantially.
- portions of a surface coating 20 are applied to the conveyor belt 10, 15.
- Fig. 2 shows a schematic representation of essential parts of the means for conveying sheet 5 by a printing machine with an array of rollers 30 and pulleys 35, wherein the upper rollers 30 and pulleys 35, an endless conveyor belt 10 and the lower rollers 30 and pulleys 35th an endless conveyor belt 15 is assigned.
- the two pulleys 35 per conveyor belt 10, 15 are each a motorized roller for moving the conveyor belt 10, 15 and a counter-tensioning roller.
- the conveyor belt 10 is stretched around the upper roller 30 and pulleys 35 and the conveyor belt 15 around the lower rollers 30 and pulleys 35, and these move in the directions indicated by the directional arrows.
- the surface coating 20 made of a material having a high coefficient of friction with respect to the material of the sheet 5 and the sheet 5 are not shown in Fig. 2.
- the conveyor belts 10, 15 are each moved by a drive of one of these engaging pulleys 35 around them in a circuit.
- the rollers 30 are used for so-called entanglement of the conveyor belt 10, 15 and exert the forces F1 and F2 on the conveyor belt 10 and 15, respectively.
- the voltage applied to the conveyor belt 10, 15 sheet 5 is moved according to the conveyor belt 10, 15, frictional forces between the conveyor belt 10, 15 and the sheet 5 are effective. It is desirable that the frictional forces are as large as possible, so that slippage of the sheet 5 can be effectively prevented and the sheet 5 passes through the transport path without errors, ie in the correct orientation and location.
- Cleaning rollers 40 provided, in Fig. 2 each have a cleaning roller 40 above and below the rollers 30 and pulleys 35 with the conveyor belt 10, 15.
- the cleaning rollers 40 may have its own drive, but are preferably by the movement of the conveyor belt 10, 15th driven. With the help of the cleaning rollers 40, the surface coating 20 is effectively cleaned with each revolution and their friction coefficient is maintained.
- the rollers 30 may be formed as cleaning rollers.
- rollers 30 are in this case reduced compared to similar means for promoting sheet 5, since the increased frictional forces between the sheet 5 and the conveyor belt 10, 15, a constant mechanical pressure by rollers 30 is not required to ensure safe transport in ensure correct alignment without slippage or displacement of the sheet 5.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
- Registering Or Overturning Sheets (AREA)
Description
Die Erfindung betrifft eine Einrichtung zur Förderung von Bogen durch eine drucktechnische Maschine gemäß dem Oberbegriff von Anspruch 1. Bei drucktechnischen Maschinen werden Bogen verschiedener Art, Größe und Merkmale durch die Bereiche der drucktechnischen Maschine aus Bogenvorräten zu Ausstoßbehältern des bedruckten Stoffes transportiert. Hierbei legt der Bogen erhebliche Transportwege zurück, in deren Verlauf der Druckvorgang stattfindet, und wird im Wesentlichen von Transportbändern oder -riemen bewegt, die um bewegliche und teils angetriebene Rollen gespannt sind. Ein wesentliches Kriterium beim Transport des Bogens stellt ein reibungsloser und fehlerloser Ablauf unter Verringerung von Fehlern durch Verschiebungen oder Verrutschen einzelner Bogen oder Blätter des Bogens dar, d.h. die Lage und Orientierung des Bogens am Transportband oder - riemen. Der sichere Transport des Bogen ist besonders bei kleinen Bogenformaten insbesondere an den Übergabebereichen zwischen zwei Riemensystemen und bei Richtungsänderungen eines Bogenweges, etwa beim Übergang von einem senkrechten zu einem waagerechten Bogenweg gefährdet. Eine Möglichkeit, den Transportweg des Bogens zu sichern besteht darin, den Bogen auf möglichst langen Wegstrecken an den Spannrollen zu führen, d.h. die Anzahl der Spannrollen in der drucktechnischen Maschine zu erhöhen. Eine zweite Möglichkeit besteht darin, den Reibungskoeffizienten der Oberflächen der Transportbänder zu erhöhen und hierdurch die Sicherheit des Transports des Bogens zu erhöhen.The invention relates to a device for conveying sheets by a printing machine according to the preamble of claim 1. In printing machines sheets of various types, sizes and features are transported through the areas of the printing machine from sheet supplies to ejection containers of the printed fabric. Here, the sheet lays considerable transport paths, in the course of which printing takes place, and is essentially moved by conveyor belts or belts, which are stretched around moving and partly driven rollers. An essential criterion in the transport of the sheet is a smooth and flawless process, reducing errors due to displacements or slippage of individual sheets or sheets of the sheet, i. the position and orientation of the sheet on the conveyor belt or belt. The safe transport of the sheet is particularly at small sheet sizes especially at the transfer areas between two belt systems and changes in direction of a bow path, such as the transition from a vertical to a horizontal bow path endangered. One way to secure the transport path of the sheet is to guide the sheet on as long as possible on the tension rollers, i. to increase the number of tension rollers in the printing machine. A second possibility is to increase the coefficient of friction of the surfaces of the conveyor belts and thereby increase the security of the transport of the sheet.
Die zweite Möglichkeit ist in der WO96/10778 offenbart, die eine verbesserte Ablösebeschichtung zur Verwendung bei einer Vielzahl von elastomerischen Strukturen, etwa Druckrollen und Bändern beschreibt. Die Beschichtung besteht aus einer an ein Substrat befestigten dünnen ausgedehnten Polytetrafluorethylen-Haut mit einer durchlässigen Oberfläche und einer als Kontaktfläche freiliegenden undurchlässigen Fläche. Diese Verwendung von zwei Oberflächen auf eine einzige dünne Beschichtung stellt zum einen eine hervorragende Verbindung mit dem Substratmaterial bereit, z.B. eine Siliziumelastomerschicht, und ist zum zweiten hoch verschleißunempfindlich und gegen chemische Einflüsse unempfindlich.The second approach is disclosed in WO96 / 10778, which describes an improved release coating for use with a variety of elastomeric structures, such as press rolls and belts. The coating consists of a thin expanded polytetrafluoroethylene skin attached to a substrate with a permeable surface and an impermeable surface exposed as a contact surface. This use of two surfaces on a single thin coating on the one hand provides excellent bonding with the substrate material, eg, a silicon elastomer layer, and is for second insensitive to wear and insensitive to chemical influences.
Nachteilig bei der ersten Möglichkeit ist unter anderem der höhere Material- und Bauteilebedarf und daraus folgend eine höhere Wartungsanfälligkeit. Die zweite Möglichkeit stellt einen mehrschichtigen Schichtaufbau dar, dessen Herstellung eine Vielzahl von Arbeitsschritten erfordert. Ähnliches ist auch aus der JP 60 023 233 A bekannt.A disadvantage of the first option is, inter alia, the higher material and component requirements and consequently a higher maintenance susceptibility. The second possibility represents a multi-layered layer structure, the production of which requires a large number of work steps. The same is also known from JP 60 023 233 A.
Zudem offenbart die GB 2 170 165 A Fördereinrichtung für Bogen mit Förderriemen, die mit Hilfe von Rollen aneinandergepresst werden.In addition, GB 2 170 165 A discloses conveyor for sheets with conveyor belts, which are pressed together by means of rollers.
Aus der JP 08 146 706 A ist eine Reinigungsrolle zur Reinigung eines Transferbandes für die Übertragung eines Tonerbildes bekannt.From JP 08 146 706 A a cleaning roller for cleaning a transfer belt for the transfer of a toner image is known.
Die Weiteren Druckschriften JP 60012437A, JP 010113340A, JP 11091975A und JP 200019 1175A offenbaren Transportbänder mit Kontaktflächen, die streifen förmig oder separat ausgebildit sind.Further documents JP 60012437A, JP 010113340A, JP 11091975A and JP 200019 1175A disclose conveyor belts with contact surfaces which are strip-shaped or separately formed.
Aufgabe der Erfindung ist es, eine Einrichtung zur Förderung von Bogen durch eine drucktechnische Maschine bereitzustellen, die auf einfache Weise den sicheren Transport des Bogens exakt in der vorgesehenen Transportbahn mit geringem Materialaufwand gewährleistet. Diese Aufgabe erfüllt die Erfindung mit den Merkmalen des Anspruchs 1.The object of the invention is to provide a device for conveying sheets by a printing machine that ensures the safe transport of the sheet exactly in the intended transport path with low material costs in a simple manner. This object is achieved by the invention with the features of claim 1.
Weitere Ausführungsformen sind in den abhängigen Unteransprüchen ausgeführt. Erfindungsgemäß besteht die Oberflächenbeschichtung aus Silikon. Zur Reinigung der Kontaktflächen der Förderriemen, zur Vermeidung von Verschmutzungen des Bogens und zur Sicherstellung des Reibungskoeffizienten der Kontaktfläche ist den Förderriemen mindestens eine Reinigungsvorrichtung zugeordnet. Diese Reinigungsvorrichtung kann angestellte Reinigungsrollen enthalten. Weiterhin kann wenigstens eine der vorhandenen Rollen, welche entlang des Förderwegs die Förderriemen aneinander anpressen, als Reinigungsrolle ausgebildet sein. Zur Einsparung oder zur Ergänzung der Reinigungsvorrichtung weist die Oberflächenbeschichtung der Kontaktflächen eine Oberfläche auf, die schmutzabweisend ist. Der Bogen wird in Förderrichtung mittig gehalten und geführt, wobei zur Abstützung der aus den Förderriemen überhängenden Ränder Führungselemente vorgesehen sind, auf denen der Bogen während des Fördems horizontal zum Boden aufliegt. Als Führungselemente sind Bleche, Gleitschienen oder mitlaufende Bänder vorgesehen. Ferner sind beim horizontalen Fördern von Bogen mehrere Module mit Förderriemenpaaren vorgesehen, wobei je Modul der oben liegende Förderriemen kürzer ausgeführt ist als der unten liegende Förderriemen, wobei die Zahl der dem oberen Förderriemen zugeordneten Rollen um eins gegenüber der Zahl der dem unten liegenden Förderriemen zugeordneten Rollen verringert ist, und wobei die Umlenkrollen des oben liegenden Förderriemens als Spannrollen wirken und jeweils zwischen der Umlenkrolle des unten liegenden Förderriemens und der der Umlenkrolle des unteren Förderriemens benachbarten Rolle angeordnet sind.Further embodiments are set forth in the dependent subclaims. According to the invention, the surface coating consists of silicone. For cleaning the contact surfaces of the conveyor belt, to avoid contamination of the sheet and to ensure the Coefficient of friction of the contact surface is assigned to the conveyor belt at least one cleaning device. This cleaning device may contain employed cleaning rollers. Furthermore, at least one of the existing rollers, which press the conveyor belts against each other along the conveying path, may be formed as a cleaning roller. To save or supplement the cleaning device, the surface coating of the contact surfaces on a surface that is dirt-repellent. The sheet is centrally held and guided in the conveying direction, wherein for supporting the overhanging conveyor belts edges guide elements are provided, on which the sheet rests horizontally to the ground during Fördems. As guide elements plates, slides or idler bands are provided. Furthermore, several modules are provided with conveyor belt pairs in the horizontal conveying of sheets, each module of the overhead conveyor belt is designed to be shorter than the conveyor belt below, the number of the upper conveyor belt associated roles by one compared to the number of the underlying belt conveyor rollers assigned is reduced, and wherein the pulleys of the overhead conveyor belt act as tension rollers and are each arranged between the pulley of the underlying conveyor belt and the pulley of the lower conveyor belt adjacent role.
Im Folgenden ist die Erfindung anhand der Fig. 1 - 2 beispielhaft in Einzelheiten beschrieben.In the following the invention with reference to FIGS. 1 - 2 is described in detail by way of example.
Es zeigen:
- Fig.1
- eine schematische Darstellung von zwei Abschnitten von Förderbändern einer drucktechnischen Maschine mit einer abschnittweisen erfindungsgemäßen Oberflächenbeschichtung aus einem Material mit hohem Reibungskoeffizient,
- Fig.2
- eine schematische seitliche Darstellung eines Papierpfads bei einer drucktechnischen Maschine mit Umlenkrollen und Reinigungsrollen.
- Fig.1
- a schematic representation of two sections of conveyor belts of a printing machine with a section according to the invention surface coating of a material with a high coefficient of friction,
- Fig.2
- a schematic side view of a paper path in a printing machine with pulleys and cleaning rollers.
Fig.1 zeigt beispielhaft einen Abschnitt eines Förderriemens 10 und einen Abschnitt eines anderen Förderriemens 15 einer drucktechnischen Maschine. Auf dem Förderriemen 15 ersichtlich ist abschnittweise an den schraffierten Bereichen an dieser Seite des Förderriemens 15 eine Oberflächenbeschichtung 20 aus einem Material mit hohem Reibungskoeffizient hinsichtlich des Materials der Bogen aufgebracht. Der Förderriemen 15 transportiert auf dessen Oberseite Bogen 5 in Richtung des Pfeiles a. Unterhalb des Abschnitts des Förderriemens 15 ist eine Rolle 30 angeordnet, oberhalb des Abschnitts des Förderriemens 15 ist ein weiterer endloser Förderriemen 10 und über diesem eine weitere Rolle 30 angeordnet. Die Rollen 30 dienen zum sogenannten Verschränken der Förderriemen 10 bzw. 15. Unterhalb der oberen Rolle 30 ist in Fig.1 ein Abschnitt des Förderriemens 10 dargestellt, dieser bewegt sich in Richtung des Pfeils a, d.h. in die gleiche Richtung wie der Abschnitt des Förderriemens 15. Beide Förderriemen 10, 15 sind endlos. An den Bogen 5 zwischen den Förderriemen 10 und 15 wirken die Kraft F 1 , vom Anpreßdruck von der unteren Rolle 30 von unterhalb und die Kraft F 2 vom Anpreßdruck von der oberen Rolle 30 von oberhalb. Im vorliegenden Fall werden die Förderriemen 10, 15 mittels eines Motors (nicht dargestellt) in die Richtungen der gekrümmten Pfeile b angetrieben, wobei die untere und obere Rolle 30 gegenläufig sind. Die Rollen 30 sind bei dieser Darstellung nach Fig. 1 zur Verdeutlichung beabstandet dargestellt, im Betrieb sind die Rollen 30 jedoch benachbart angeordnet, zwischen denen die Förderriemen 10, 15 angedrückt sind. Aus der vorstehenden Beschreibung wird deutlich, dass der Bogen 5 zwischen den Rollen 30 am Nip, d.h. der jeweiligen Auflagefläche einer Rolle, einer schmalen Fläche senkrecht zur Transportrichtung, eingeklemmt ist. Die Rollen 30 sind in Fig.1 aus Darstellungsgründen in Seitenansicht als Kreise dargestellt, diese weisen jedoch gewöhnlich etwa eine Länge entsprechend der Breite der Förderriemen 10, 15 zuzüglich einer als Überstand bezeichneten Breite auf. Zur Gewährleistung der Laufsicherheit sind die Rollen 30 ballig ausgebildet, der Umfang der Rollen 30 ist in deren Mitte größer als an deren Rand. Durch die Drehung der Rollen 30 und die Anpreßkräfte F 1 , F 2 werden die Förderriemen 10, 15 mit dem Bogen 5 in die durch den geraden Richtungspfeil a bezeichnete Richtung bewegt. Der Bogen 5 wird hierbei im Wesentlichen durch Reibungskräfte an den Förderriemen 10, 15 gehalten und vor dem Verrutschen an den Förderriemen 10, 15 gesichert. Zu diesem Zweck sind auf den Förderriemen 10, 15 Abschnitte einer Oberflächenbeschichtung 20 aufgebracht. In Fig. 1 sind diese durch an den Förderriemen 10, 15 entlang verlaufende Streifen gezeigt. Beim Förderriemen 15 befindet sich die Oberflächenbeschichtung 20, wie in Fig. 1 ersichtlich, an dessen Oberseite, an welcher der Bogen 5 anliegt. Beim Förderriemen 10 befindet sich die Oberflächenbeschichtung 20 in dieser Darstellung nach Fig. 1 an der dem Bogen 5 zugewendeten Unterseite. Das Material mit hohem Reibungskoeffizient zum Material der Bogen 5 ist in diesem Fall Silikon, eine organische Verbindung von Silizium mit Sauerstoff oder Kohlenstoff, das bisher im Wesentlichen für medizinische Zwecke verwendet wird. Bei Laborversuchen wurde herausgefunden, dass Silikon als Oberflächenbeschichtung für Förderriemen 10, 15 besonders geeignet ist. Einige Eigenschaften im Zusammenhang mit der Erfindung sind die Flexibilität, Dehnbarkeit und Griffigkeit. Im Betrieb liegt der Bogen 5 ausschließlich an der Oberflächenbeschichtung 20 aus Silikon an. Dieser Sachverhalt wird im Folgenden in Fig. 2 verdeutlicht.1 shows by way of example a section of a
Fig. 2 zeigt in schematischer Darstellung wesentliche Teile der Einrichtung zur Förderung von Bogen 5 durch eine drucktechnische Maschine mit einer Anordnung von Rollen 30 und Umlenkrollen 35, wobei den oberen Rollen 30 und Umlenkrollen 35 ein endloser Förderriemen 10 und den unteren Rollen 30 und Umlenkrollen 35 ein endloser Förderriemen 15 zugeordnet ist. Die zwei Umlenkrollen 35 je Förderriemen 10, 15 sind jeweils eine Rolle mit Motorantrieb zum Bewegen der Förderriemen 10, 15 und eine dieser entgegengesetzten Spannrolle. Wie ersichtlich, ist der Förderriemen 10 um die obere Rolle 30 und Umlenkrollen 35 und der Förderriemen 15 um die unteren Rollen 30 und Umlenkrollen 35 gespannt, und diese bewegen sich in die durch die Richtungspfeile angebenen Richtungen. Die Oberflächenbeschichtung 20 aus einem Material mit hohem Reibungskoeffizient hinsichtlich des Materials der Bogen 5 und der Bogen 5 sind in Fig. 2 nicht dargestellt. Die Förderriemen 10, 15 werden jeweils durch einen Antrieb einer der an diese angreifenden Umlenkrollen 35 um diese herum in einem Kreislauf bewegt. Die Rollen 30 dienen zum sogenannten Verschränken der Förderriemen 10, 15 und üben die Kräfte F1 und F2 auf die Förderriemen 10 bzw. 15 aus. Damit der an den Förderriemen 10, 15 anliegende Bogen 5 entsprechend den Förderriemen 10, 15 bewegt wird, sind Reibungskräfte zwischen den Förderriemen 10, 15 und dem Bogen 5 wirksam. Erwünscht ist, dass die Reibungskräfte möglichst groß sind, so dass ein Verrutschen des Bogens 5 wirksam verhindert werden kann und der Bogen 5 den Transportweg fehlerfrei durchläuft, d.h. in korrekter Orientierung und Lage. Zur Reinigung der Förderriemen 10, 15 und insbesondere der Oberflächenbeschichtung 20 von Verschmutzungen sind weiterhin an die Förderriemen 10, 15 angestellte Reinigungsrollen 40 vorgesehen, in Fig. 2 jeweils eine Reinigungsrolle 40 oberhalb und eine unterhalb der Rollen 30 und Umlenkrollen 35 mit den Förderriemen 10, 15. Die Reinigungsrollen 40 können über einen eigenen Antrieb verfügen, werden jedoch bevorzugt durch die Bewegung der Förderriemen 10, 15 angetrieben. Mit Hilfe der Reinigungsrollen 40 wird die Oberflächenbeschichtung 20 bei jedem Umlauf wirkungsvoll gereinigt und deren Reibungskoeffizient bleibt erhalten. Alternativ können die Rollen 30 als Reinigungsrollen ausgebildet sein. Die Anzahl der Rollen 30 ist hierbei im Vergleich zu ähnlichen Einrichtungen zur Förderung von Bogen 5 verringert, da durch die erhöhten Reibungskräfte zwischen dem Bogen 5 und den Förderriemen 10, 15 ein ständiger mechanischer Druck durch Rollen 30 nicht erforderlich ist, um den sicheren Transport in fehlerfreier Ausrichtung ohne Verrutschen oder Verschieben des Bogens 5 sicherzustellen.Fig. 2 shows a schematic representation of essential parts of the means for conveying
Claims (3)
- Device for transporting sheets (5) through a printing-technology-type machine, said device consisting of continuous transport belts (10, 15) moving over deflecting rollers (35), between which transport belts (10, 15) the sheets (5) are successively held and guided with the aid of frictional forces, said frictional forces being generated by rollers (30) pressing the transport belts (10, 15) against each other along the transport path, the contact surfaces of said transport belts (10, 15) with the sheet (5) having a surface coating (20) of a material exhibiting a high coefficient of friction with respect to the material of the sheets (5),
characterized in that
the surface coating (20) consists of silicone and is, in partial areas of the contact surfaces, configured in strips or in the form of separate islands, that, along the transport path, the rollers (30, 35) are alternately in engagement with the side of the transport belts (10, 15) facing away from the contact surface in such a manner that, during the horizontal transport of the sheets (5), several modules with transport belt pairs are provided, whereby, for each module, the upper transport belt (10) is configured shorter than the lower transport belt (15), with the number of rollers allocated to the upper transport belt (10) being reduced by a number of one with respect to the number of rollers allocated to the lower transport belt (15), and the deflecting rollers (35) of the upper transport belt (15) acting as tension rollers and being each located between the deflecting roller (35) of the lower transport belt (15) and the roller (30) adjacent to the deflecting roller (35) of the lower transport belt (15). - Device in accordance with Claim 1, characterized in that the sheets (5) are held and guided centered in transport direction, whereby, in order to support the edges hanging over the transport belts (10, 15), guide elements are provided which support the sheets (5) during horizontal transport.
- Device in accordance with Claim 2, characterized in that sheet metal pieces, slide rails or idler belts are provided as guide elements.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10113005A DE10113005A1 (en) | 2001-03-17 | 2001-03-17 | Bow promotion facility |
DE10113005 | 2001-03-17 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1241119A2 EP1241119A2 (en) | 2002-09-18 |
EP1241119A3 EP1241119A3 (en) | 2004-02-04 |
EP1241119B1 true EP1241119B1 (en) | 2006-08-30 |
Family
ID=7677904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02002594A Expired - Lifetime EP1241119B1 (en) | 2001-03-17 | 2002-02-05 | Device for conveying sheets |
Country Status (4)
Country | Link |
---|---|
US (1) | US20020130462A1 (en) |
EP (1) | EP1241119B1 (en) |
JP (1) | JP2002321846A (en) |
DE (2) | DE10113005A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4654718B2 (en) * | 2005-03-16 | 2011-03-23 | 富士ゼロックス株式会社 | Image recording device manufacturing apparatus |
ATE389497T1 (en) * | 2005-06-21 | 2008-04-15 | Fameccanica Data Spa | DEVICE AND DEVICE FOR LASER CUTTING ARTICLES, IN PARTICULAR SANITARY PRODUCTS AND THEIR COMPONENTS, WITH A LASER FOCUS POINT DIAMETER OF 0.1 TO 0.3 MM |
DE102005040652A1 (en) * | 2005-08-26 | 2007-03-01 | Eastman Kodak Company | Sheet filing device for use in e.g. electrophotographic printing machine, has transport paths formed branching out around surface of rotary transport component for sending sheets, in which one transport path is used as return path |
DE102007031848A1 (en) * | 2007-07-09 | 2009-01-15 | Heidelberger Druckmaschinen Ag | Sheet punching and embossing machine and sheet alignment method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6012437A (en) * | 1983-07-04 | 1985-01-22 | Canon Inc | Sheet material carrier |
JPH1191975A (en) * | 1997-07-25 | 1999-04-06 | Hokushin Ind Inc | Endless belt for conveying paper sheet and the like |
JP2000191175A (en) * | 1998-12-25 | 2000-07-11 | Sharp Corp | Record medium carrying belt and recording device using it |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2170165A (en) * | 1985-01-30 | 1986-07-30 | Cubic Western Data | Ticket transport mechanism |
JPS6413340A (en) * | 1987-07-02 | 1989-01-18 | Nec Corp | Wafer conveying device |
JPH04140243A (en) * | 1990-09-28 | 1992-05-14 | Toshiba Corp | Carrier device of paper sheet, etc. |
JPH0623233A (en) * | 1992-07-07 | 1994-02-01 | Babcock Hitachi Kk | Waste gas treating apparatus |
JPH06115751A (en) * | 1992-10-08 | 1994-04-26 | Minolta Camera Co Ltd | Document conveying belt |
EP0647583B1 (en) * | 1993-09-20 | 1999-11-24 | Kabushiki Kaisha Toshiba | Apparatus for inspecting sheet materials and conveying device used therefor |
US5798181A (en) * | 1994-10-04 | 1998-08-25 | W. L. Gore & Associates, Inc. | Fluoropolymer coated elastomeric rollers and structures |
JP3399672B2 (en) * | 1994-11-16 | 2003-04-21 | 株式会社リコー | Image forming device |
JPH09156794A (en) * | 1995-12-15 | 1997-06-17 | Tec Corp | Cleaning device for belt for conveying paper sheet |
-
2001
- 2001-03-17 DE DE10113005A patent/DE10113005A1/en not_active Withdrawn
-
2002
- 2002-02-05 DE DE50207962T patent/DE50207962D1/en not_active Expired - Lifetime
- 2002-02-05 EP EP02002594A patent/EP1241119B1/en not_active Expired - Lifetime
- 2002-02-21 US US10/080,256 patent/US20020130462A1/en not_active Abandoned
- 2002-03-15 JP JP2002072035A patent/JP2002321846A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6012437A (en) * | 1983-07-04 | 1985-01-22 | Canon Inc | Sheet material carrier |
JPH1191975A (en) * | 1997-07-25 | 1999-04-06 | Hokushin Ind Inc | Endless belt for conveying paper sheet and the like |
JP2000191175A (en) * | 1998-12-25 | 2000-07-11 | Sharp Corp | Record medium carrying belt and recording device using it |
Also Published As
Publication number | Publication date |
---|---|
EP1241119A3 (en) | 2004-02-04 |
DE10113005A1 (en) | 2002-09-19 |
JP2002321846A (en) | 2002-11-08 |
EP1241119A2 (en) | 2002-09-18 |
DE50207962D1 (en) | 2006-10-12 |
US20020130462A1 (en) | 2002-09-19 |
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