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EP1124689B1 - Sheet feeding device in a printing machine - Google Patents

Sheet feeding device in a printing machine Download PDF

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Publication number
EP1124689B1
EP1124689B1 EP99971374A EP99971374A EP1124689B1 EP 1124689 B1 EP1124689 B1 EP 1124689B1 EP 99971374 A EP99971374 A EP 99971374A EP 99971374 A EP99971374 A EP 99971374A EP 1124689 B1 EP1124689 B1 EP 1124689B1
Authority
EP
European Patent Office
Prior art keywords
air
flow channel
pneumatic system
sheet
sheet guiding
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.)
Revoked
Application number
EP99971374A
Other languages
German (de)
French (fr)
Other versions
EP1124689A1 (en
Inventor
Peter Wulf
Peter Michel
Petra Franz
Stefan Hartmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP1124689A1 publication Critical patent/EP1124689A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers
    • B41F21/102—Combinations of transfer drums and grippers with pneumatic means

Definitions

  • the invention relates to a sheet guiding device in a Printing machine according to the preamble of the main claim.
  • a sheet guiding device of this type is known from EP 0 156 173 B1 for guiding sheet-shaped sheets printed on one or both sides Media known.
  • This guide is through modularly arranged flow channels, which openings have as air nozzles in a guide surface.
  • the Flow channels have a plurality of fans for the Supply of blown air or suction air.
  • a blower or suction box has the guide surface as a top surface and is connected to a blower or suction air source by means of blower or suction air nozzles.
  • Flow resistance-forming bodies protrude from the top surface into the blow / suction box.
  • the flow resistance of the above-mentioned bodies in the blowing / suction box decreases.
  • the disadvantage here is that, particularly in blown air operation, this arrangement of the flow resistance-forming bodies causes turbulence in the area of the through openings, which can lead to an unstable arc run.
  • the invention has for its object a sheet guiding device to create in a printing press that named Avoids disadvantages, especially in blown air operation and safe sheet guidance is also permitted in suction air mode and noticeably reduced the occurrence of turbulence.
  • the task is based on the training features of the main claim solved. Further training results from the subclaims.
  • a first advantage of the invention is that the sheet-carrying printing material in blown air and suction air mode the sheet guiding device safely and evenly without greasing is feasible.
  • the sheet guide device according to the invention are turbulences in the range of air flow Avoidable openings, so that in blown air mode one of these openings with a substantially uniform Pressure distribution emerging stable flowing air cushion between the guiding surface of the sheet guiding device and forms one side of the sheet-shaped printing material.
  • the risk of greasing is reduced as this is preferred diffusely flowing air cushions with a substantially more uniform Pressure distribution leads the substrate.
  • the sheet guide device too can be operated in suction air mode. This is an even one Sucking up the preferably unprinted side of the printing material towards the guiding surface of the sheet guiding device realizable.
  • the sheet guiding device is supplied with air by a preferably switchable adjustable pneumatic system, which a central blown air or suction air supply is permitted. Alternatively, their direction of rotation can be switched, speed-adjustable fans can be used.
  • the sheet guiding device is in the printing press the sheet transport systems, preferably gripper bars on the sheet guide cylinders (System drum, transfer cylinder, impression cylinder and turning system) and in the boom in a defined Distance straight or curved adjacent.
  • this sheet guide is below as well above sheet-guiding cylinders and drum or rotating ones Conveyor systems can be arranged.
  • Another advantage of the sheet guiding device is that justifies that a pulse current distribution by means of directional elements or pressure distribution over the sheet-guiding surface can be influenced in a targeted manner.
  • This enables the each pneumatic system selectively into a flow channel introduced air in its pressure distribution within the Flow channel become more uniform, leading to a calming of the sheet run.
  • an air permeable Training e.g. a perforation that will be straightening elements possible recirculation areas of the air flow are suppressed and achieved a calming of the flow in the flow channel.
  • By taking into account the blowing or suction direction of the pneumatic system inclined arrangement of the straightening elements (or their subsections) are through the use air-permeable materials, such as. B. more perforated Materials, shadows of the currents in the flow channel reduced. This also leads to an even pressure distribution in the flow channel.
  • the guiding surface of the sheet guiding device is air-permeable Guide surface with air to flow through Through openings formed.
  • air-permeable Guide surfaces are preferably diffuse on the bottom and / or top of an arcuate printing material acting currents can be generated in the form of blown air or suction air.
  • a rotary printing press in series construction has one A plurality of printing units 11 for multi-color offset printing.
  • each Printing unit 11 is through a plate cylinder 1, a blanket cylinder 3 and a sheet guide cylinder, here as Designated pressure cylinder 4, formed.
  • Each plate cylinder 1 an inking unit and possibly a dampening unit are assigned.
  • Between the printing units 11 are one or several turning systems 13 (e.g. as a single drum or three drum application) and transfer cylinder 14 arranged.
  • the last printing unit 11 (or one Coating unit) a boom 12 downstream.
  • the boom 12 has an endless circulating conveyor system 16, e.g. as a chain drive with a sprocket shaft 15 on.
  • the sheet guiding cylinders System drum, turning system 13, transfer cylinder 14, printing cylinder 4) and the conveyor system 16 are defined in Distances assigned sheet guide devices 7 adjacent.
  • These sheet guiding devices 7 are in a modular arrangement arranged several times in a row and extend across the maximum format width of the sheet-shaped printing material 18.
  • the sheet guiding devices 7 have guide surfaces 8 which are provided with openings through which air can flow.
  • Each guide surface 8 forms a continuous (straight and / or curved) plane for guiding the printing material 18.
  • the sheet guiding devices arranged in a modular design 7 are preferably by a plurality of guide modules 5,9 educated.
  • the control module 5 preferably for an arrangement below the conveyor level of the Printing material and the control module 9 for an arrangement above the conveying level of the substrate.
  • the basic structure is the same in both training courses.
  • everyone Control module 5.9 each has a flow channel 17, which with the guide surface 8 and a pneumatic system 10 for each the blown air or suction air supply in functional connection is.
  • the pneumatic system 10 is, for example, the central one Air supply or through a plurality of on the rear wall the flow channels 17 arranged fans can be realized.
  • the Guide surface 8 is preferably connected to flow channel 17 releasably connected and forms the sheet-shaped printing material 18 assigned top surface of the flow channel 17.
  • At least one straightening element is located within the flow channel 17 6 arranged associated with at least one pneumatic system 10.
  • the straightening element is shown in FIG. 2 6 as extending within the flow channel 17 Perforated sheet formed, which the pneumatic system 10th is assigned adjacent.
  • the perforated plate shows a constant hole pattern.
  • the hole pattern is also varying, i.e. the air flow openings are in Size and distance different, can be trained.
  • the straightening element 6 is as centric and / or concentric to the pneumatic system 10 formed adjacent air guide surface.
  • the Air guiding surfaces of the straightening elements 6 are flat and / or curved executable. The distances are between two straightening elements 6 A1, A2 of the air guiding surfaces with each other with increasing Distance from the pneumatic system 10 is larger (A2> A1).
  • the air guiding surfaces can also be surfaces with the pneumatic system Form 10 distant trailing edges.
  • the air guiding surfaces of the straightening elements are also a further development 6 with openings (e.g. holes, slots, pores a porous material), which can be flowed through by air are.
  • hood-shaped attachment with air-permeable openings (e.g. Holes, slots, pores) of the respective pneumatic system 10 assigned.
  • the hood-shaped attachment forms a chamber within the flow channel 17, the air in the blown air mode flows out of the hood surface. In suction air mode the air above the hood surface becomes a pneumatic system 10 sucked in.
  • 2 to 4 are, for example, for an arrangement of guide modules 5 for below sheet-guiding Cylinders 4, 14 or rotating conveyor systems 16 used.
  • a Guide module 9 shown which above sheet-guiding Cylinders 4, 14 or rotating conveyor systems 16 can be used is.
  • This is the inside of a flow channel 17 Pneumatic system 10 associated straightening element 6 as a perforated plate educated.
  • the hole pattern of the perforated plate is constant or can be trained in various ways as already described.
  • the extension the perforated plate is limited, however, so that of the Pneumatic system 10 most distant part of the guide surface 8 always sufficiently supplied with air, preferably with blown air is.
  • the straightening elements 6 described serve in the flow channel 17 the generation of a for the respective operating mode (fine print, Perfecting) favorable, even pressure distribution (Pulse current distribution) over the entire guide surface 8.
  • the punctual by the or the pneumatic systems 10 introduced into the flow channel 17 during blown air operation Air flow is specifically directed by means of straightening elements 6, to ensure safe sheet guidance. Also in suction air mode is sucked into the flow channel 17 Targeted air, resulting in a stable, calm curve causes. Disruptive recirculation currents or shading effects through the directional elements 6 are through the Arrangement and design of the straightening elements 6, in particular through air flow, e.g. perforated or porous, Avoidable openings.
  • the flow introduced by the pneumatic system 10 is directed in a targeted manner in the blown air mode and distributed within the flow channel 17.
  • Printing materials 18 with the printed or lacquered side facing the sheet guiding device 7 can thus be guided in a stable, lubrication-free manner.
  • the suction air mode the flow extracted by the pneumatic system 10 is selectively distributed beforehand within the flow channel 17.
  • the openings in the respective straightening element 6 prevent the flow at the guide surface edges from becoming detached and from forming recirculation areas which interfere with the pressure distribution.
  • the penetration resistance can be varied by the type (size, distance) of the openings on the straightening element 6.
  • the suction air operation can be carried out in a stable manner, in particular for printing substrates 18 with an unprinted or unpainted side facing the sheet guide device 7.
  • FIGS. 3 and 4 only on the left directional elements 6 the pulse flow indicated by arrows.
  • the mode of action is as follows:
  • the sheet-shaped printing material 18 passes through the printing units 11, possibly coating units, in the conveying direction 2 or processing stations and is in the boom 12 placed on a stack.
  • the Guide modules 5.9 of the sheet guide device 7 pneumatically acted upon.
  • the sheet-shaped printing material 18 is over the format evenly on the preferably diffuse flowing Air cushion led. Be through this stable flow Vacuum zones, the fluttering of the sheet-shaped substrate 18 favor avoided.
  • the sheet guide device 7 can also be operated in suction air mode.
  • the Sheet guiding device 7 is not on one side Allocation from to substrate 18 (top or bottom) limited. Rather, it is also bilateral Assignment to printing material 18 possible.
  • the guide surface 8 is detachable with the Flow channel 17 connected.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Screen Printers (AREA)

Abstract

An air assisted sheet guide device in a printing machine which is operable during either positive pressure (blast) air operation as well as suction air operation to permit reliable and stable sheet guidance with reduced air flow turbulence. The sheet guide device includes at least one module that defines a guide surface having air flow openings therein and an air flow channel, and a pneumatic system for creating either a positive or suction pressure generated air flow in the flow channel. One or more plate-like air directional elements are mounted within the air flow channel which create a uniform pressure distribution on the guide surface during positive (blast) air operation and which more uniformly direct air to the pneumatic system during suction pressure operation.

Description

Die Erfindung betrifft eine Bogenleiteinrichtung in einer Druckmaschine nach dem Oberbegriff des Hauptanspruches.The invention relates to a sheet guiding device in a Printing machine according to the preamble of the main claim.

[Stand der Technik][State of the art]

Eine Bogenleiteinrichtung dieser Art ist aus EP 0 156 173 B1 zum Führen von ein- bzw. beidseitig bedruckten bogenförmigen Bedruckstoffen bekannt. Diese Leiteinrichtung ist durch modular angeordnete Strömungskanäle gebildet, welche Öffnungen als Luftdüsen in einer Führungsflächen aufweisen. Die Strömungskanäle weisen eine Mehrzahl von Lüftern für die Versorgung mit Blasluft bzw. Saugluft auf.A sheet guiding device of this type is known from EP 0 156 173 B1 for guiding sheet-shaped sheets printed on one or both sides Media known. This guide is through modularly arranged flow channels, which openings have as air nozzles in a guide surface. The Flow channels have a plurality of fans for the Supply of blown air or suction air.

Weiterhin ist eine Bogenleiteinrichtung mit einer Führungsfläche mit Durchgangsöffnungen für Luft aus DE 42 44 499 C2 bekannt. Ein Blas- bzw. Saugkasten weist als Deckfläche die Führungsfläche auf und ist mittels Blas- bzw. Saugluftstutzen mit einer Blas- bzw.Saugluftquelle verbunden.
Von der Deckfläche ragen strömungswiderstandsbildende Körper in den Blas-/ Saugkasten. Mit zunehmendem Abstand vom Mündungsbereich des Blas-/Saugstutzens nimmt der Strömungswiderstand der obengenannten Körper im Blas-/Saugkasten ab.
Von Nachteil ist hierbei, daß insbesondere im Blasluftbetrieb durch diese Anordnung der strömungswiderstandbildenden Körper Turbulenzen im Bereich der Durchgangsöffnungen auftreten, die zu einem instabilen Bogenlauf führen können.Furthermore, a sheet guiding device with a guide surface with through openings for air is known from DE 42 44 499 C2. A blower or suction box has the guide surface as a top surface and is connected to a blower or suction air source by means of blower or suction air nozzles.
Flow resistance-forming bodies protrude from the top surface into the blow / suction box. With increasing distance from the mouth area of the blowing / suction nozzle, the flow resistance of the above-mentioned bodies in the blowing / suction box decreases.
The disadvantage here is that, particularly in blown air operation, this arrangement of the flow resistance-forming bodies causes turbulence in the area of the through openings, which can lead to an unstable arc run.

[Aufgabe der Erfindung]OBJECT OF THE INVENTION

Der Erfindung liegt die Aufgabe zugrunde eine Bogenleiteinrichtung in einer Druckmaschine zu schaffen, die die genannten Nachteile vermeidet, die insbesondere im Blasluftbetrieb als auch im Saugluftbetrieb eine sichere Bogenführung gestattet und das Auftreten von Turbulenzen spürbar reduziert. The invention has for its object a sheet guiding device to create in a printing press that named Avoids disadvantages, especially in blown air operation and safe sheet guidance is also permitted in suction air mode and noticeably reduced the occurrence of turbulence.

Erfindungsgemäß wird die Aufgabe durch die Ausbildungsmerkmale des Hauptanspruches gelöst. Weiterbildungen ergeben sich aus den Unteransprüchen.According to the invention, the task is based on the training features of the main claim solved. Further training results from the subclaims.

Ein erster Vorteil der Erfindung ist darin begründet, daß der bogenführende Bedruckstoff im Blasluft- sowie Saugluftbetrieb der Bogenleiteinrichtung sicher und abschmierfrei gleichmäßig führbar ist. Durch die erfindungsgemäße Ausbildung der Bogenleiteinrichtung sind Turbulenzen im Bereich von luftdurchströmbaren Öffnungen vermeidbar, so daß im Blasluftbetrieb sich ein aus diesen Öffnungen mit im wesentlichen gleichmäßiger Druckverteilung austretendes stabil strömendes Luftpolster zwischen der Führungsfläche der Bogenleiteinrichtung und einer Seite des bogenförmigen Bedruckstoffes ausbildet. Die Gefahr des Abschmierens reduziert sich dabei, da das bevorzugt diffus strömende Luftpolster bei im wesentlichen gleichmäßiger Druckverteilung den Bedruckstoff führt.A first advantage of the invention is that the sheet-carrying printing material in blown air and suction air mode the sheet guiding device safely and evenly without greasing is feasible. Through the formation of the sheet guide device according to the invention are turbulences in the range of air flow Avoidable openings, so that in blown air mode one of these openings with a substantially uniform Pressure distribution emerging stable flowing air cushion between the guiding surface of the sheet guiding device and forms one side of the sheet-shaped printing material. The The risk of greasing is reduced as this is preferred diffusely flowing air cushions with a substantially more uniform Pressure distribution leads the substrate.

Vorteilhaft ist weiterhin, daß die Bogenleiteinrichtung auch im Saugluftbetrieb betreibbar ist. Damit ist ein gleichmäßiges Ansaugen der vorzugsweise unbedruckten Seite des Bedruckstoffes in Richtung Führungsfläche der Bogenleiteinrichtung realisierbar.It is also advantageous that the sheet guide device too can be operated in suction air mode. This is an even one Sucking up the preferably unprinted side of the printing material towards the guiding surface of the sheet guiding device realizable.

Die Luftversorgung der Bogenleiteinrichtung erfolgt durch ein vorzugsweise umschaltbares regelbares Pneumatiksystem, welches eine zentrale Blasluft- oder Saugluftversorgung gestattet. Alternativ sind in ihrer Drehrichtung umschaltbare, drehzahlregelbare Lüfter einsetzbar.The sheet guiding device is supplied with air by a preferably switchable adjustable pneumatic system, which a central blown air or suction air supply is permitted. Alternatively, their direction of rotation can be switched, speed-adjustable fans can be used.

Die Bogenleiteinrichtung ist in der Druckmaschine den Bogentransportsystemen, vorzugsweise Greiferbrücken, an den Bogenführungszylindern (Anlagetrommel, Transferzylinder, Druckzylinder und Wendesystem) und im Ausleger in einem definierten Abstand gerade oder gekrümmt benachbart zugeordnet. Darüber hinaus ist diese Bogenleiteinrichtung unterhalb als auch oberhalb von bogenführenden Zylindern und Trommel bzw. umlaufenden Fördersystemen anordbar.The sheet guiding device is in the printing press the sheet transport systems, preferably gripper bars on the sheet guide cylinders (System drum, transfer cylinder, impression cylinder and turning system) and in the boom in a defined Distance straight or curved adjacent. About that in addition, this sheet guide is below as well above sheet-guiding cylinders and drum or rotating ones Conveyor systems can be arranged.

Ein weiterer Vorteil der Bogenleiteinrichtung ist darin begründet, daß mittels Richtelemente eine Impulsstromverteilung bzw. Druckverteilung über die bogenführende Fläche gezielt beeinflußt werden kann. Dadurch kann die von dem jeweiligen Pneumatiksystem punktuell in einen Strömungskanal eingebrachte Luft in ihrer Druckverteilung innerhalb des Strömungskanals vergleichmäßig werden, was zu einer Beruhigung des Bogenlaufes führt. Durch eine luftdurchlässige Ausbildung, z.B. eine Perforierung, der Richtelemente werden mögliche Rezirkulationsgebiete der Luftströmung unterdrückt und eine Beruhigung der Strömung im Strömungskanal erzielt. Durch eine unter Berücksichtigung der Einblas- bzw. Absaugrichtung des Pneumatiksystems geneigte Anordnung der Richtelemente (oder deren Teilabschnitte) werden durch den Einsatz luftdurchlässiger Materialien, wie z. B. perforierter Materialien, Abschattungen der Strömungen im Strömungskanal reduziert. Dies führt ebenso zu einer gleichmäßigen Druckverteilung im Strömungskanal.Another advantage of the sheet guiding device is that justifies that a pulse current distribution by means of directional elements or pressure distribution over the sheet-guiding surface can be influenced in a targeted manner. This enables the each pneumatic system selectively into a flow channel introduced air in its pressure distribution within the Flow channel become more uniform, leading to a calming of the sheet run. Through an air permeable Training, e.g. a perforation that will be straightening elements possible recirculation areas of the air flow are suppressed and achieved a calming of the flow in the flow channel. By taking into account the blowing or suction direction of the pneumatic system inclined arrangement of the straightening elements (or their subsections) are through the use air-permeable materials, such as. B. more perforated Materials, shadows of the currents in the flow channel reduced. This also leads to an even pressure distribution in the flow channel.

Die Führungsfläche der Bogenleiteinrichtung ist als luftdurchlässige Führungsfläche mit von Luft durchströmbaren Durchgangsöffnungen gebildet. Mittels dieser luftdurchlässigen Führungsfläche sind vorzugsweise diffuse, auf die Unterseite und/oder Oberseite eines bogenförmigen Bedruckstoffes wirkende Strömungen in Form von Blasluft oder Saugluft erzeugbar.The guiding surface of the sheet guiding device is air-permeable Guide surface with air to flow through Through openings formed. By means of this air-permeable Guide surfaces are preferably diffuse on the bottom and / or top of an arcuate printing material acting currents can be generated in the form of blown air or suction air.

[Beispiele][Examples]

Die Erfindung soll an einem Ausführungsbeispiel näher erläutert werden. Dabei zeigen schematisch

Fig. 1
eine Rotationsdruckmaschine mit Bogenleiteinrichtungen,
Fig. 2
einen Modul der Bogenleiteinrichtung in erster Ausbildung,
Fig. 3
einen Modul der Bogenleiteinrichtung in zweiter Ausbildung,
Fig. 4
einen Modul der Bogenleiteinrichtung in dritter Ausbildung,
Fig. 5
einen Modul der Bogenleiteinrichtung in vierter Ausbildung.
The invention will be explained in more detail using an exemplary embodiment. Show schematically
Fig. 1
a rotary printing machine with sheet guiding devices,
Fig. 2
a module of the sheet guiding device in first training,
Fig. 3
a module of the sheet guiding device in a second embodiment,
Fig. 4
a module of the sheet guiding device in third training,
Fig. 5
a module of the sheet guiding device in fourth training.

Eine Rotationsdruckmaschine in Reihenbauweise besitzt eine Mehrzahl von Druckwerken 11 für den Mehrfarbenoffsetdruck. Zusätzlich ist wenigstens ein Lackierwerk oder eine sonstige Verarbeitungstation dem letzten Druckwerk nachordbar. Jedes Druckwerk 11 ist durch einen Plattenzylinder 1, einen Gummituchzylinder 3 sowie einem Bogenführungszylinder, hier als Druckzylinder 4 bezeichnet, gebildet. Jedem Plattenzylinder 1 ist ein Farbwerk und ggf. ein Feuchtwerk zugeordnet. Zwischen den Druckwerken 11 sind als Bogenführungszylinder ein oder mehrere Wendesysteme 13, (z.B. als Eintrommel- oder Dreitrommelwendung) sowie Transferzylinder 14 angeordnet.A rotary printing press in series construction has one A plurality of printing units 11 for multi-color offset printing. In addition, there is at least one painting unit or another Processing station can be arranged after the last printing unit. each Printing unit 11 is through a plate cylinder 1, a blanket cylinder 3 and a sheet guide cylinder, here as Designated pressure cylinder 4, formed. Each plate cylinder 1 an inking unit and possibly a dampening unit are assigned. Between the printing units 11 are one or several turning systems 13 (e.g. as a single drum or three drum application) and transfer cylinder 14 arranged.

In Förderrichtung 2 ist dem letzten Druckwerk 11 (oder einem Lackwerk) ein Ausleger 12 nachgeordnet. Der Ausleger 12 weist ein endlos umlaufendes Fördersystem 16, z.B. als Kettentrieb mit einer Kettenradwelle 15, auf. Den Bogenführungszylindern (Anlagetrommel, Wendesystem 13, Transferzylinder 14, Druckzylinder 4) sowie dem Fördersystem 16 sind in definierten Abständen Bogenleiteinrichtungen 7 benachbart zugeordnet. In the conveying direction 2 is the last printing unit 11 (or one Coating unit) a boom 12 downstream. The boom 12 has an endless circulating conveyor system 16, e.g. as a chain drive with a sprocket shaft 15 on. The sheet guiding cylinders (System drum, turning system 13, transfer cylinder 14, printing cylinder 4) and the conveyor system 16 are defined in Distances assigned sheet guide devices 7 adjacent.

Diese Bogenleiteinrichtungen 7 sind in modularer Anordnung mehrfach aneinandergereiht angeordnet und erstrecken sich über die maximale Formatbreite des bogenförmigen Bedruckstoffes 18. Die Bogenleiteinrichtungen 7 weisen Führungsflächen 8 auf, welche mit luftdurchströmbaren Öffnungen versehen sind. Jede Führungsfläche 8 bildet dabei eine durchgängige (gerade und/oder gekrümmte) Ebene zur Führung des Bedruckstoffes 18.These sheet guiding devices 7 are in a modular arrangement arranged several times in a row and extend across the maximum format width of the sheet-shaped printing material 18. The sheet guiding devices 7 have guide surfaces 8 which are provided with openings through which air can flow. Each guide surface 8 forms a continuous (straight and / or curved) plane for guiding the printing material 18.

Die in modularer Bauweise angeordneten Bogenleiteinrichtungen 7 sind vorzugsweise durch eine Mehrzahl von Leitmodulen 5,9 gebildet. Im vorliegenden Beispiel wird der Leitmodul 5 bevorzugt für eine Anordnung unterhalb der Förderebene des Bedruckstoffes und der Leitmodul 9 für eine Anordnung oberhalb der Förderebene des Bedruckstoffes beschrieben. Der Grundaufbau ist dabei in beiden Ausbildungen gleich. Jeder Leitmodul 5,9 weist je einen Strömungskanal 17 auf, der mit der Führungsfläche 8 sowie je einem Pneumatiksystem 10 für die Blasluft- oder Saugluftversorgung in Funktionsverbindung ist. Das Pneumatiksystem 10 ist beispielsweise als zentrale Luftversorgung oder durch eine Mehrzahl von an der Rückwand der Strömungskanäle 17 angeordneten Lüftern realisierbar. Die Führungsfläche 8 ist vorzugsweise mit dem Strömungskanal 17 lösbar verbunden und bildet die dem bogenförmigen Bedruckstoff 18 zugeordnete Deckfläche des Strömungskanals 17.The sheet guiding devices arranged in a modular design 7 are preferably by a plurality of guide modules 5,9 educated. In the present example, the control module 5 preferably for an arrangement below the conveyor level of the Printing material and the control module 9 for an arrangement above the conveying level of the substrate. The The basic structure is the same in both training courses. Everyone Control module 5.9 each has a flow channel 17, which with the guide surface 8 and a pneumatic system 10 for each the blown air or suction air supply in functional connection is. The pneumatic system 10 is, for example, the central one Air supply or through a plurality of on the rear wall the flow channels 17 arranged fans can be realized. The Guide surface 8 is preferably connected to flow channel 17 releasably connected and forms the sheet-shaped printing material 18 assigned top surface of the flow channel 17.

Innerhalb des Strömungskanals 17 ist wenigstens ein Richtelement 6 wenigstens einem Pneumatiksystem 10 zugeordnet angeordnet. In erster Ausbildung ist gemäß Fig. 2 das Richtelement 6 als ein sich innerhalb des Strömungskanals 17 erstrekkendes Lochblech ausgebildet, welches dem Pneumatiksystem 10 benachbart zugeordnet ist. Das Lochblech zeigt hierbei ein konstantes Lochbild auf. Alternativ ist das Lochbild auch variierend, d.h. die luftdurchströmbaren Öffnungen sind in Größe und Abstand unterschiedlich, ausbildbar. At least one straightening element is located within the flow channel 17 6 arranged associated with at least one pneumatic system 10. In a first embodiment, the straightening element is shown in FIG. 2 6 as extending within the flow channel 17 Perforated sheet formed, which the pneumatic system 10th is assigned adjacent. The perforated plate shows a constant hole pattern. Alternatively, the hole pattern is also varying, i.e. the air flow openings are in Size and distance different, can be trained.

In zweiter Ausbildung gemäß Fig. 3 ist das Richtelement 6 als zentrische und/oder konzentrische dem Pneumatiksystem 10 benachbart zugeordnete Luftleitfläche ausgebildet. Ebenso ist eine Mehrfachanordnung von Richtelementen 6 pro Pneumatiksystem 10 im Strömungskanal 17 realisierbar. Dabei sind die Luftleitflächen der Richtelemente 6 eben und/oder gekrümmt ausführbar. Zwischen zwei Richtelementen 6 sind die Abstände A1, A2 der Luftleitflächen untereinander mit zunehmender Entfernung vom Pneumatiksystem 10 größer ausgebildet (A2 > A1). Die Luftleitflächen können ebenso Flächen mit vom Pneumatiksystem 10 entfernt angeordneten Abströmkanten bilden. In einer Weiterbildung sind auch die Luftleitflächen der Richtelemente 6 mit Öffnungen ( z.B. Bohrungen, Schlitze, Poren eines porösen Materials) ausgebildet, die von Luft durchströmbar sind.In the second embodiment according to FIG. 3, the straightening element 6 is as centric and / or concentric to the pneumatic system 10 formed adjacent air guide surface. Likewise a multiple arrangement of straightening elements 6 per pneumatic system 10 realizable in the flow channel 17. Here are the Air guiding surfaces of the straightening elements 6 are flat and / or curved executable. The distances are between two straightening elements 6 A1, A2 of the air guiding surfaces with each other with increasing Distance from the pneumatic system 10 is larger (A2> A1). The air guiding surfaces can also be surfaces with the pneumatic system Form 10 distant trailing edges. In The air guiding surfaces of the straightening elements are also a further development 6 with openings (e.g. holes, slots, pores a porous material), which can be flowed through by air are.

In dritter Ausbildung gemäß Fig. 4 ist ein Richtelement 6 als haubenförmiger Aufsatz mit luftdurchlässigen Öffnungen (z.B. Bohrungen, Schlitze, Poren) dem jeweiligen Pneumatiksystem 10 zugeordnet. Der haubenförmige Aufsatz bildet eine Kammer innerhalb des Strömungskanals 17, wobei die Luft im Blasluftbetrieb aus der Haubenoberfläche ausströmt. Im Saugluftbetrieb wird die Luft über die Haubenoberfläche zum Pneumatiksystem 10 eingesaugt.4 is a straightening element 6 as hood-shaped attachment with air-permeable openings (e.g. Holes, slots, pores) of the respective pneumatic system 10 assigned. The hood-shaped attachment forms a chamber within the flow channel 17, the air in the blown air mode flows out of the hood surface. In suction air mode the air above the hood surface becomes a pneumatic system 10 sucked in.

Die Ausbildungen gemäß Fig. 2 bis 4 sind beispielsweise für eine Anordnung von Leitmodulen 5 für unterhalb von bogenführenden Zylindern 4,14 bzw. umlaufenden Fördersystemen 16 einsetzbar.2 to 4 are, for example, for an arrangement of guide modules 5 for below sheet-guiding Cylinders 4, 14 or rotating conveyor systems 16 used.

In vierter Ausbildung ist gemäß Fig. 5 die Anordnung eines Leitmoduls 9 gezeigt, welche oberhalb von bogenführenden Zylindern 4,14 bzw. umlaufenden Fördersystemen 16 einsetzbar ist. Hierbei ist innerhalb eines Strömungskanals 17 das dem Pneumatiksystem 10 zugeordnete Richtelement 6 als Lochblech ausgebildet. Das Lochbild des Lochbleches ist konstant oder wie bereits beschrieben variierend ausbildbar. Die Erstrekkung des Lochbleches ist jedoch begrenzt, so daß der von dem Pneumatiksystem 10 entfernteste Teil der Führungsfläche 8 stets ausreichend mit Luft, vorzugsweise mit Blasluft, versorgbar ist.In a fourth embodiment, the arrangement of a Guide module 9 shown, which above sheet-guiding Cylinders 4, 14 or rotating conveyor systems 16 can be used is. This is the inside of a flow channel 17 Pneumatic system 10 associated straightening element 6 as a perforated plate educated. The hole pattern of the perforated plate is constant or can be trained in various ways as already described. The extension the perforated plate is limited, however, so that of the Pneumatic system 10 most distant part of the guide surface 8 always sufficiently supplied with air, preferably with blown air is.

Die beschriebenen Richtelemente 6 im Strömungskanal 17 dienen der Erzeugung einer für die jeweilige Betriebsart (Schöndruck, Schön- und Widerdruck) günstigen gleichmäßigen Druckverteilung (Impulsstromverteilung) über die gesamte Führungsfläche 8. Die durch das bzw. die Pneumatiksysteme 10 punktuell bei Blasluftbetrieb in den Strömungskanal 17 eingeleitete Luftströmung wird mittels Richtelementen 6 gezielt gerichtet, um eine sichere Bogenführung zu gewährleisten. Auch im Saugluftbetrieb wird die in den Strömungskanal 17 abgesaugte Luft gezielt gerichtet, was eine stabile ruhige Bogenführung bewirkt. Störende Rezirkulierungsströmungen oder Abschattungswirkungen durch die Richtelemente 6 sind durch die Anordnung und Ausbildung der Richtelemente 6 , insbesondere durch luftdurchströmbare, z.B. perforierten oder poröse, Öffnungen vermeidbar.The straightening elements 6 described serve in the flow channel 17 the generation of a for the respective operating mode (fine print, Perfecting) favorable, even pressure distribution (Pulse current distribution) over the entire guide surface 8. The punctual by the or the pneumatic systems 10 introduced into the flow channel 17 during blown air operation Air flow is specifically directed by means of straightening elements 6, to ensure safe sheet guidance. Also in suction air mode is sucked into the flow channel 17 Targeted air, resulting in a stable, calm curve causes. Disruptive recirculation currents or shading effects through the directional elements 6 are through the Arrangement and design of the straightening elements 6, in particular through air flow, e.g. perforated or porous, Avoidable openings.

Mittels der Richtelemente 6 wird im Blasluftbetrieb die vom Pneumatiksystem 10 punktuell eingeleitete Strömung gezielt gerichtet und innerhalb des Strömungskanals 17 verteilt. Damit sind Bedruckstoffe 18 mit zur Bogenleiteinrichtung 7 zugewandten bedruckten bzw. lackierten Seite stabil abschmierfrei führbar.
Im Saugluftbetrieb wird die vom Pneumatiksystem 10 punktuell abgesaugte Strömung vorher innerhalb des Strömungskanals 17 gezielt verteilt. Insbesondere durch die Öffnungen im jeweiligen Richtelement 6 wird verhindert, daß die Strömung an den Leitflächenkanten sich ablöst und sich auf die Druckverteilung störende Rezirkulationsgebiete bilden. Durch die Art (Größe, Abstand) der Öffnungen am Richtelement 6 ist der Durchtrittswiderstand variierbar. Der Saugluftbetrieb ist insbesondere für Bedruckstoffe 18 mit zur Bogenleiteinrichtung 7 zugewandten unbedruckten bzw. unlackierten Seite stabil führbar.By means of the straightening elements 6, the flow introduced by the pneumatic system 10 is directed in a targeted manner in the blown air mode and distributed within the flow channel 17. Printing materials 18 with the printed or lacquered side facing the sheet guiding device 7 can thus be guided in a stable, lubrication-free manner.
In the suction air mode, the flow extracted by the pneumatic system 10 is selectively distributed beforehand within the flow channel 17. In particular, the openings in the respective straightening element 6 prevent the flow at the guide surface edges from becoming detached and from forming recirculation areas which interfere with the pressure distribution. The penetration resistance can be varied by the type (size, distance) of the openings on the straightening element 6. The suction air operation can be carried out in a stable manner, in particular for printing substrates 18 with an unprinted or unpainted side facing the sheet guide device 7.

Aus Gründen der Übersichtlichkeit ist in den Figuren 3 und 4 lediglich an den linken Richtelementen 6 die Impulsströmung durch Pfeile angedeutet.For reasons of clarity, FIGS. 3 and 4 only on the left directional elements 6 the pulse flow indicated by arrows.

Die Wirkungsweise ist folgt: Der bogenförmige Bedruckstoff 18 durchläuft in Förderrichtung 2 die Druckwerke 11, ggf. Lackwerke oder Weiterverarbeitungsstationen und wird im Ausleger 12 auf einem Stapel abgelegt. Um eine abschmierfreie Förderung des Bedruckstoffes 18 zu gewährleisten, werden die Leitmodule 5,9 der Bogenleiteinrichtung 7 pneumatisch beaufschlagt.The mode of action is as follows: The sheet-shaped printing material 18 passes through the printing units 11, possibly coating units, in the conveying direction 2 or processing stations and is in the boom 12 placed on a stack. For a lubrication-free delivery to ensure the substrate 18, the Guide modules 5.9 of the sheet guide device 7 pneumatically acted upon.

Im Blasluftbetrieb wird durch wenigstens ein Pneumatiksystem 10 im jeweiligen Strömungskanal 17 ein Überdruck aufgebaut, der als diffuse Blasluftströmung aus der Führungsfläche 8 austritt. Der bogenförmige Bedruckstoff 18 wird dabei über das Format gleichmäßig auf dem bevorzugt diffus strömenden Luftpolster geführt. Durch diese stabile Strömung werden Unterdruckzonen, die das Flattern des bogenförmigen Bedruckstoffes 18 begünstigen vermieden. Die Bogenleiteinrichtung 7 ist darüber hinaus auch im Saugluftbetrieb betreibbar. Die Bogenleiteinrichtung 7 ist dabei nicht auf einer einseitige Zuordnung vom zum Bedruckstoff 18 (Oberseite oder Unterseite) beschränkt. Vielmehr ist darüber hinaus auch eine beidseitige Zuordnung zum Bedruckstoff 18 realisierbar. Vorzugsweise für Reinigungszwecke ist die Führungsfläche 8 lösbar mit dem Strömungskanal 17 verbunden. In blown air mode, there is at least one pneumatic system 10 an overpressure is built up in the respective flow channel 17, that as a diffuse blown air flow from the guide surface 8 exit. The sheet-shaped printing material 18 is over the format evenly on the preferably diffuse flowing Air cushion led. Be through this stable flow Vacuum zones, the fluttering of the sheet-shaped substrate 18 favor avoided. The sheet guide device 7 can also be operated in suction air mode. The Sheet guiding device 7 is not on one side Allocation from to substrate 18 (top or bottom) limited. Rather, it is also bilateral Assignment to printing material 18 possible. Preferably for For cleaning purposes, the guide surface 8 is detachable with the Flow channel 17 connected.

[Bezugszeichenliste][REFERENCE LIST]

11
Plattenzylinderplate cylinder
22
Förderrichtungconveying direction
33
GummituchzylinderBlanket cylinder
44
Druckzylinderpressure cylinder
55
Leitmodulrouting module
66
Richtelementdirectional element
77
Bogenleiteinrichtungsheet guiding device
88th
Führungsflächeguide surface
99
Leitmodulrouting module
1010
Pneumatiksystempneumatic system
1111
Druckwerkprinting unit
1212
Auslegerboom
1313
Wendesystemturning system
1414
Transferzylindertransfer cylinder
1515
Kettenradwellesprocket
1616
Fördersystemconveyor system
1717
Strömungskanalflow channel
1818
Bedruckstoffsubstrate
A1 A 1
Abstanddistance
A2 A 2
Abstanddistance

Claims (7)

  1. Sheet guiding unit in a printing press with a flow channel and a guide surface, wherein, in the guide surface, openings are arranged which can be subjected by means of a pneumatic system to blown air and suction, characterised in that the sheet guiding unit (7) is formed of at least one guide module (5, 9), that each guide module (5, 9) has a flow channel functionally connected with the guide surface (8) and a pneumatic system (10) and that at least one directing element (6) arranged within the flow channel (17) is fitted to a pneumatic system (10) in such a fashion that the air flow introduced by means of a pneumatic system (10) into the flow channel (17) is directed as an even pressure distribution within the flow channel (17) towards the guide surface (8).
  2. Sheet guiding unit according to Claim 1, characterised in that the sheet guiding unit (7) formed from at least one guide module (5, 9) has within the flow channel (17) at least one directing element (6) fitted to the pneumatic system (10) in order to be able to carry out in such an operation an even air flow sucked away in the flow channel (17) at various points to the pneumatic system (10).
  3. Sheet guiding unit according to at least Claim 1, characterised in that the directional element (6) is an air guide sheet with openings through which air can flow.
  4. Sheet guiding unit according to at least Claim 1, characterised in that the perforation pattern of the openings of the directing element (6) is constant or varies.
  5. Sheet guiding unit according to at least Claim 1, characterised in that the directing elements (6) are fitted centrally and/or concentrically to the pneumatic system (10), wherein between two directing elements (6), a distance (A2) to a flow-off edge is greater than a distance (A1) to the neighbouring pneumatic system (10).
  6. Sheet guiding unit according to at least Claim 1, characterised in that the directing element (6) is fitted in a hood shape with air throughflowable openings to the pneumatic system (10).
  7. Sheet guiding unit according to at least Claim 1, characterised in that the guide surface (8) is releasably connected with the flow channel (17).
EP99971374A 1998-10-30 1999-10-02 Sheet feeding device in a printing machine Revoked EP1124689B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29819402U DE29819402U1 (en) 1998-10-30 1998-10-30 Sheet guiding device in a printing press
DE29819402U 1998-10-30
PCT/EP1999/007318 WO2000026031A1 (en) 1998-10-30 1999-10-02 Sheet feeding device in a printing machine

Publications (2)

Publication Number Publication Date
EP1124689A1 EP1124689A1 (en) 2001-08-22
EP1124689B1 true EP1124689B1 (en) 2002-07-24

Family

ID=8064644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99971374A Revoked EP1124689B1 (en) 1998-10-30 1999-10-02 Sheet feeding device in a printing machine

Country Status (8)

Country Link
US (1) US6726203B1 (en)
EP (1) EP1124689B1 (en)
JP (1) JP2002528362A (en)
CN (1) CN1131778C (en)
AT (1) ATE220995T1 (en)
CZ (1) CZ295070B6 (en)
DE (2) DE29819402U1 (en)
WO (1) WO2000026031A1 (en)

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US6910416B2 (en) 2002-12-12 2005-06-28 Heidelberger Druckmaschinen Ag Suction guidance device for a single-drum turner

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Publication number Priority date Publication date Assignee Title
DE20002090U1 (en) * 2000-02-05 2001-06-21 MAN Roland Druckmaschinen AG, 63075 Offenbach Sheet guiding device in a printing press
DE10100198A1 (en) † 2001-01-04 2002-07-11 Koenig & Bauer Ag Sheet guiding device in printing machines
DE10233097B4 (en) * 2002-07-20 2010-02-25 Koenig & Bauer Aktiengesellschaft Sheet guiding device in a printing machine
DE10331626B3 (en) * 2003-07-12 2005-01-13 Nexpress Solutions Llc Bedruckstoffführung

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US3592329A (en) * 1966-10-27 1971-07-13 Gen Logistics Differential pressure conveyors
DE3411029A1 (en) 1984-03-24 1985-10-03 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach DEVICE FOR GUIDING SHEETS PRINTED ON SIDE AND BOTH SIDES
US5133255A (en) * 1990-12-31 1992-07-28 Howard W. DeMoore Vacuum transfer apparatus for rotary sheet-fed printing presses
DE4106904A1 (en) 1991-03-05 1992-09-10 Koenig & Bauer Ag NOZZLE ARRANGEMENT FOR THE ARC GUIDE IN ARC ROTATION PRINTING MACHINES
DE4244499C2 (en) 1992-12-30 1995-04-06 Heidelberger Druckmasch Ag Printing machine with sheet guiding surface
US5634636A (en) * 1996-01-11 1997-06-03 Xerox Corporation Flexible object handling system using feedback controlled air jets
US5839722A (en) * 1996-11-26 1998-11-24 Xerox Corporation Paper handling system having embedded control structures
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EP0899228B1 (en) * 1997-08-28 2004-04-14 Heidelberger Druckmaschinen Aktiengesellschaft Air cushion guiding device
DE19829094C2 (en) * 1998-06-30 2002-10-24 Roland Man Druckmasch Guide device for sheet-shaped substrates in a printing machine
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Publication number Priority date Publication date Assignee Title
US6910416B2 (en) 2002-12-12 2005-06-28 Heidelberger Druckmaschinen Ag Suction guidance device for a single-drum turner

Also Published As

Publication number Publication date
JP2002528362A (en) 2002-09-03
ATE220995T1 (en) 2002-08-15
DE59902146D1 (en) 2002-08-29
CN1325344A (en) 2001-12-05
CZ20011519A3 (en) 2001-12-12
CZ295070B6 (en) 2005-05-18
DE29819402U1 (en) 1999-03-11
US6726203B1 (en) 2004-04-27
CN1131778C (en) 2003-12-24
EP1124689A1 (en) 2001-08-22
WO2000026031A1 (en) 2000-05-11

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