EP0275882B1 - Conveying device for a sheet-fed rotary printing machine - Google Patents

Conveying device for a sheet-fed rotary printing machine Download PDF

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Publication number
EP0275882B1
EP0275882B1 EP88100155A EP88100155A EP0275882B1 EP 0275882 B1 EP0275882 B1 EP 0275882B1 EP 88100155 A EP88100155 A EP 88100155A EP 88100155 A EP88100155 A EP 88100155A EP 0275882 B1 EP0275882 B1 EP 0275882B1
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EP
European Patent Office
Prior art keywords
sheet
displacer
gripper
drum
conveying device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88100155A
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German (de)
French (fr)
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EP0275882A3 (en
EP0275882A2 (en
Inventor
Marco Bergmann
Herbert Rebel
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Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT88100155T priority Critical patent/ATE70495T1/en
Publication of EP0275882A2 publication Critical patent/EP0275882A2/en
Publication of EP0275882A3 publication Critical patent/EP0275882A3/en
Application granted granted Critical
Publication of EP0275882B1 publication Critical patent/EP0275882B1/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
    • B41F21/08—Combinations of endless conveyors and grippers
    • 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

Definitions

  • the invention relates to a conveyor device for a sheet-fed rotary printing machine according to the preamble of the first claim.
  • a conveyor device with these features has become known from DE-PS 2 111 049.
  • the gripper supports of the gripper systems usually protrude beyond the pitch circle diameter of the deflection chain wheels.
  • they run on a radius which is approximately equal to the radius of the gripper pads of the grippers of the printing press cylinder. If the transport chains run off the deflection sprockets and continue in a straight line, the speed of the gripper pads reduces to the speed of the transport chains.
  • the rear end of the sheet has not yet left the printing press cylinder in the case of larger formats and is accordingly moved forward faster than the sheet beginning is pulled off.
  • the bow loses its tension and can form waves that lead to an increased risk of lubrication.
  • the sheet is carried along on the rubber cylinder until it is torn off. This can lead to permanent deformation of the arch.
  • the disadvantage here is that the sheet displacer lubricates the sheet and in particular does not act immediately after the sheet has been transferred to the gripper systems.
  • the front edge of the take-off drum or the support disks will smear due to the kinking of the tangent.
  • the beginning of the bow gives way especially in the case of a large drum channel, to a certain extent in the non-load-bearing area of the take-up drum, before it can be displaced by the arc displacer that can be controlled radially between two support disks of the take-up drum.
  • This means that the known tension of the sheet on the rubber blanket of the blanket cylinder preventing tension can not be generated from the beginning of the handover by a sheet displacer that can be controlled centrally on the take-up drum between two support disks.
  • blowing air device In chain transfer systems, it is also important to support the sheet after the transport chains have left the chain radius of the take-up drum in order to ensure flutter-free sheet travel into the next printing unit or for sheet delivery. Another disadvantage is that the blowing air device requires a high level of ventilation and control effort.
  • the invention is therefore based on the object in a conveyor device of the type mentioned by a mechanical sheet displacer the printed sheet with reduced risk of smearing immediately after transfer from the pressure cylinder to the gripper systems from the beginning of the sheet with sufficient tension until the loosening of the gripper closure of the rotating transport chains to guide arranged gripper systems, d. i.e. until the next transfer or delivery of the sheet with the chain transfer system.
  • the sheet is removed in a known manner from a printing cylinder 1 by means of gripper systems 4, 19 provided on rotating transport chains, not shown, and is guided around a removal drum 2.
  • the gripper systems 4, 19 have gripper supports 4 and 19, which are connected to the transport chains in a gripper carriage 15 on a gripper support spindle 10 and a gripper shaft 11 (FIG. 3).
  • the take-off drum 2 carries two deflection sprockets, not shown, over which the transport chains run.
  • each printing unit has, in a known manner, rubber and plate cylinders.
  • this is done in that the tension in the sheet is maintained from the start of the transfer of the sheet 5 from the impression cylinder 1 to the gripper systems 4, 19.
  • the space covered by the printed sheet 5 between the gripper systems 4, 19 arranged on the circulating transport chains and an opposite supporting surface of the take-up drum 2 becomes fixed or radial immediately after the sheet 5 is transferred to the gripper systems 4, 19 by one on the gripper systems 4, 19 bridged adjustable or out of the chain radius arch displacer 3 bridged, the curved support surface has approximately the radius of the supporting surfaces of the drum shell of the take-up drum 2.
  • the arc displacer 3 can be full-surface or recessed and axially adjustable.
  • the radial adjustment option allows to compensate for a small path error during the running of the sheet 5, which results from the radial difference between the gripper pad 4 and the diameter of the supporting surfaces of the take-off drum 2, if the gripper pad 4 is processed over the radius of the thin sheet 5 bearing surfaces of the drum shell of the take-off drum 2 is also set.
  • control rollers 7 are arranged on both sides of the shaft of the take-up drum, which run on curves 12 under spring force 8.
  • the control rollers 7 are attached to both ends of a cross member 17, which the bow displacer 3rd or carries a controllable sheet displacement comb 6 at one end.
  • the bow displacement comb 6 or the bow displacer 3 is pivotally connected at the other end to the gripper systems 4, 19 in order to pivot them out of the chain radius of the deflection sprockets or after the bow end has left the pressure zone.
  • the curved support surfaces of the sheet displacer 3 either as a controllable sheet displacement comb 6 or as a radially adjustable sheet displacement comb 16 and the cooperating bearing surfaces of the drum shell of the take-up drum 2 interlocking as a sheet carrier comb 13.
  • the comb arrangement prevents the surfaces of the sheet displacer 3 fastened to the rotating gripper systems 4, 19 and the surfaces fastened to the rotating take-up drum 2 when the gripper systems 4, 19 enter the area of the take-up drum 2 or collide when leaving the take-up drum 2 due to the relative speeds present.
  • elements 18, for. B. rolls are provided in the curved support surface of the sheet displacer 3 or the sheet displacement comb 6, 16 and / or the load-bearing surfaces of the drum shell of the take-up drum 2 or the sheet support comb 13, elements 18, for. B. rolls are provided.
  • all known comparable elements can be used to prevent lubrication, such as. B. sheet guide rings, special surface coatings, knobs, covering with Super Blue, glass beads or other lifts. The additional use of blown air or the like would also be conceivable, but is not absolutely necessary.
  • the beginning of the arc of the arch 5 lies more snugly against the curved support surface of the arch displacer 3 or the arch displacer combs 6, 16, so that a lubrication-free and flutter-free arch guide until the release of the gripper in the following printing unit or the sheet delivery is guaranteed.
  • the advantages of the solution according to the invention are that in a very simple and inexpensive embodiment after the sheet 5 has been transferred to the gripper systems 4, 19 of the transport chains, a uniform pull can always be maintained by displacement of the sheet from the beginning of the sheet, as a result of which no lubrication of the front drum edge occurs fear.
  • This pull can also be maintained by steering the bend displacer out of the chain radius if the beginning of the bend already runs slowly on a straight path from the deflection sprockets and the end of the bend is still in the Pressure zone moves faster.

Abstract

A conveyor for a sheet-fed rotary printing press for transferring sheets away from an impression cylinder includes a delivery cylinder disposed adjacent the impression cylinder, and a chain conveyor having a plurality of sheet grippers, adapted for moving the grippers about the delivery cylinder for successively engaging sheets on the impression cylinder. The delivery cylinder has a gap in its outer periphery for receiving successive of the sheet grippers during transfer of a sheet from the impression cylinder to the sheet grippers. The sheet grippers each include a support and a pivotable gripper finger, and a displacer mounted on and extending rearwardly of each gripper support for bridging the gap in the delivery cylinder within which the gripper is disposed during a sheet transfer operation, and for maintaining tension in the sheet during transfer from the impression cylinder to the chain conveyor. The displacer is comb shaped having a plurality of rearwardly extending arcute shaped teeth. A sheet support comb also may be supported on the delivery cylinder with its teeth forwardly extending in intermeshing relation with the teeth of the displacer so as to completely bridge the gap within which the sheet gripper is disposed. Antismear rollers or like elements may be disposed on the teeth of the displacer and the sheet support comb to facilitate smooth transfer of the sheet away from the compression cylinder.

Description

Die Erfindung betrifft eine Fördervorrichtung für eine Bogenrotationsdruckmaschine nach dem Oberbegriff des ersten Patentanspruches.The invention relates to a conveyor device for a sheet-fed rotary printing machine according to the preamble of the first claim.

Eine Fördervorrichtung mit diesen Merkmalen ist durch die DE-PS 2 111 049 bekannt geworden. Bei derartigen Fördervorrichtungen ragen die Greiferauflagen der Greifersysteme üblicherweise über den Teilkreisdurchmesser der Umlenkkettenräder hinaus. Sie laufen während der Bogenübergabe auf einem Radius, der etwa gleich dem Radius der Greiferauflagen der Greifer des Druckmaschinenzylinders ist. Laufen die Transportketten von den Umlenkkettenrädern ab und geradlinig weiter, so vermindert sich die Geschwindigkeit der Greiferauflagen auf die Geschwindigkeit der Transportketten. Das hintere Ende des Bogens hat zu diesem Zeitpunkt jedoch bei größeren Formaten den Druckmaschinenzylnder noch nicht verlassen und wird dementsprechend schneller vorwärtsbewegt als der Bogenanfang abgezogen wird. Hierdurch verliert der Bogen seine Spannung und kann Wellen bilden, die zu einer erhöhten Abschmiergefahr führen. Außerdem wird der Bogen am Gummizylinder mitgenommen, bis er abgerissen wird. Dies kann zu einer bleibenden Verformung des Bogens führen. Um diese Nachteile zu beseitigen, ist es aus der oben genannten Patentschrift bekannt, einen Bogenverdränger gegen den Bogen zu drücken, um ihn nach der Übergabe an die Greifersysteme der Transportketten unter Spannung zu halten.A conveyor device with these features has become known from DE-PS 2 111 049. With such conveyor devices, the gripper supports of the gripper systems usually protrude beyond the pitch circle diameter of the deflection chain wheels. During the sheet transfer, they run on a radius which is approximately equal to the radius of the gripper pads of the grippers of the printing press cylinder. If the transport chains run off the deflection sprockets and continue in a straight line, the speed of the gripper pads reduces to the speed of the transport chains. At this point, however, the rear end of the sheet has not yet left the printing press cylinder in the case of larger formats and is accordingly moved forward faster than the sheet beginning is pulled off. As a result, the bow loses its tension and can form waves that lead to an increased risk of lubrication. In addition, the sheet is carried along on the rubber cylinder until it is torn off. This can lead to permanent deformation of the arch. In order to eliminate these disadvantages, it is known from the above-mentioned patent specification to press a sheet displacer against the sheet in order to keep it under tension after transfer to the gripper systems of the transport chains.

Von Nachteil ist dabei, daß der Bogenverdränger am Bogen abschmiert und insbesondere nicht bereits unmittelbar nach Übergabe des Bogens an die Greifersysteme wirkt. Dadurch besteht die Gefahr, daß die vordere Kante der Abnahmetrommel bzw. die Tragscheiben infolge des Abknickens der Bogentangente abschmieren. Der Bogenanfang weicht insbesondere bei großem Trommelkanal gewissermaßen in den nichttragenden Bereich der Abnahmetrommel aus, bevor er durch den radial zwischen zwei Tragscheiben der Abnahmetrommel aus dem Kettenradius heraussteuerbaren Bogenverdränger verdrängt werden kann. Das bedeutet, daß die das bekannte Mitlaufen des Bogens am Gummituch des Gummituchzylinders verhindernde Spannung durch einen an der Abnahmetrommel mittig zwischen zwei Tragscheiben heraussteuerbaren Bogenverdränger nicht bereits von Anfang der Übergabe an erzeugt werden kann.The disadvantage here is that the sheet displacer lubricates the sheet and in particular does not act immediately after the sheet has been transferred to the gripper systems. As a result, there is a risk that the front edge of the take-off drum or the support disks will smear due to the kinking of the tangent. The beginning of the bow gives way especially in the case of a large drum channel, to a certain extent in the non-load-bearing area of the take-up drum, before it can be displaced by the arc displacer that can be controlled radially between two support disks of the take-up drum. This means that the known tension of the sheet on the rubber blanket of the blanket cylinder preventing tension can not be generated from the beginning of the handover by a sheet displacer that can be controlled centrally on the take-up drum between two support disks.

Aus der DE-PS 2 017 417 ist es zwar für Trans elübergabesysteme bekannt, bei einer Abnahmetrommel, die an nur einem Teil des Mantels eine tragende Oberfläche aufweist, in den vom Bogen überdeckten Raum zwischen dieser tragenden Fläche und einer auf der Trommel ortsfest angeordneten Greifereinrichtung einen durch eine Blaslufteinrichtung gebildeten Bogenverdränger vorzusehen.From DE-PS 2 017 417 it is known for Trans elübergabeesysteme, with a take-off drum, which has a supporting surface on only a part of the jacket, in the arc-covered space between this supporting surface and a stationary gripper device arranged on the drum to provide an arc displacer formed by a blowing air device.

Es bereitet aber Schwierigkeiten, durch das gebildete Luftkissen das Abknicken der Bogentangente zu verhindern, wenn sehr hohe Zugkräfte auf den Bogen, z. B. bei Doppeldruckwerken einwirken und zur zeitweiligen Aufnahme von an umlaufenden Transportketten befestigten stabilen Greifersystemen mit den zugehörigen Greiferwagen erheblich größere Trommelkanäle erforderlich werden. Die Blaslufteinrichtung läuft außerdem nur mit der Abnahmetrommel um und wirkt somit nur im Trommelbereich. Bei Kettenübergabesystemen kommt es zusätzlich auch darauf an, den Bogen zu stützen, nachdem die Transportketten den Kettenradius der Abnahmetrommel verlassen haben, um einen flatterfreien Bogenlauf in das nächste Druckwerk oder zur Bogenauslage zu bewirken. Außerdem ist von Nachteil, daß die Blaslufteinrichtung einen hohen lufttechnischen Aufwand und Steuerungsaufwand erfordert.However, it is difficult to prevent the tangent from kinking due to the air cushion formed when very high tensile forces are exerted on the arch, e.g. B. act on double printing units and considerably larger drum channels are required for the temporary reception of stable gripper systems attached to rotating transport chains with the associated gripper carriage. The blowing air device also only rotates with the take-off drum and thus only works in the drum area. In chain transfer systems, it is also important to support the sheet after the transport chains have left the chain radius of the take-up drum in order to ensure flutter-free sheet travel into the next printing unit or for sheet delivery. Another disadvantage is that the blowing air device requires a high level of ventilation and control effort.

Der Erfindung liegt deshalb die Aufgabe zugrunde, bei einer Fördervorrichtung eingangs genannter Gattung durch einen mechanischen Bogenverdränger den bedruckten Bogen bei verringerter Abschmiergefahr unmittelbar nach Übergabe vom Druckzylinder an die Greifersysteme vom Anfang des Bogens her mit ausreichender Spannung bis zur Aufhebung des Greiferschlusses der an den umlaufenden Transportketten angeordneten Greifersysteme zu führen, d. h., bis zur nächsten Übergabe oder Auslage des Bogens mit dem Kettenübergabesystem.The invention is therefore based on the object in a conveyor device of the type mentioned by a mechanical sheet displacer the printed sheet with reduced risk of smearing immediately after transfer from the pressure cylinder to the gripper systems from the beginning of the sheet with sufficient tension until the loosening of the gripper closure of the rotating transport chains to guide arranged gripper systems, d. i.e. until the next transfer or delivery of the sheet with the chain transfer system.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des ersten Patentanspruches gelöst. Weiterbildungen ergeben sich aus den Unteransprüchen und der Zeichnung in Verbindung mit der Beschreibung.This object is achieved by the characterizing features of the first claim. Further developments result from the subclaims and the drawing in connection with the description.

Die Erfindung wird nachstehend anhand einer Zeichnung in einem Ausführungsbeispiel näher erläutert.The invention is explained below with reference to a drawing in one embodiment.

Es zeigt

Figur 1
eine schematische Seitenansicht der erfindungsgemäß wesentlichen Teile mit fester Anordnung des Bogenverdrängers am Greifersystem,
Figur 2
eine schematische Seitenansicht der erfindungsgemäß wesentlichen Teile mit einem aus dem Kettenradius heraus schwenkbaren Bogenverdränger am Greifersystem, in Kammanordnung,
Figur 3
eine Draufsicht auf Figur 2,
Figur 4
eine schematische Seitenansicht der erfindungsgemäß wesentlichen Teile mit fester oder radial einstellbarer Anordnung des Bogenverdrängers am Greifersystem, in Kammanordnung.
It shows
Figure 1
2 shows a schematic side view of the parts essential according to the invention with a fixed arrangement of the arc displacer on the gripper system,
Figure 2
1 shows a schematic side view of the parts essential according to the invention with a bow displacer which can be pivoted out of the chain radius on the gripper system, in a comb arrangement,
Figure 3
2 shows a plan view of FIG. 2,
Figure 4
is a schematic side view of the essential parts according to the invention with a fixed or radially adjustable arrangement of the sheet displacer on the gripper system, in a comb arrangement.

Zur Überführung eines bedruckten Bogens 5 von einem Druckwerk zum nächsten Druckwerk oder zur Bogenauslage einer Bogenrotationsoffsetdruckmaschine durch Kettenübergabesysteme wird der Bogen in bekannter Weise von einem Druckzylinder 1 mittels an nicht dargestellten umlaufenden Transportketten vorgesehenen Greifersystemen 4, 19 abgenommen und um eine Abnahmetrommel 2 geführt. Die Greifersysteme 4, 19 weisen Greiferauflagen 4 und 19 auf, die in Greiferwagen 15 auf einer Greiferauflagenspindel 10 und einer Greiferwelle 11 gelagert mit den Transportketten verbunden sind (Figur 3). Die Abnahmetrommel 2 trägt zwei nicht dargestellte Umlenkkettenräder, über die die Transportketten laufen. Jedes Druckwerk weist in bekannter Weise außer dem Druckzylinder 1 nicht dargestellte Gummi-und Plattenzylinder auf.To transfer a printed sheet 5 from one printing unit to the next printing unit or for sheet delivery of a sheet-fed rotary offset printing press by chain transfer systems, the sheet is removed in a known manner from a printing cylinder 1 by means of gripper systems 4, 19 provided on rotating transport chains, not shown, and is guided around a removal drum 2. The gripper systems 4, 19 have gripper supports 4 and 19, which are connected to the transport chains in a gripper carriage 15 on a gripper support spindle 10 and a gripper shaft 11 (FIG. 3). The take-off drum 2 carries two deflection sprockets, not shown, over which the transport chains run. In addition to the printing cylinder 1, each printing unit has, in a known manner, rubber and plate cylinders.

Je nach Zügigkeit der Farbe, der Beschaffenheit der Gummitücher an deren Oberfläche und der Gestaltung des Bogenlaufes besteht die Möglichkeit, daß die Bogentangente beim Lauf des Bogens 5 über die tragenden Flächen der Abnahmetrommel 2 an der vorderen Trommelkante 14 abknickt. Dabei besteht die Gefahr des Abschmierens des bedruckten Bogens, wenn nicht verhindert wird, daß der Bogenanfang in den überdeckten Raum der Abnahmetrommel 2 gezogen wird.Depending on the briskness of the color, the nature of the rubber blankets on their surface and the design of the sheet run, there is the possibility that the sheet tangent bends when the sheet 5 runs over the supporting surfaces of the take-up drum 2 at the front drum edge 14. There is a risk of the printed sheet being smeared if it is not prevented that the beginning of the sheet is pulled into the covered space of the take-up drum 2.

Erfindungsgemäß geschieht das dadurch, daß die Zugspannung im Bogen von Beginn der Übergabe des Bogens 5 vom Druckzylinder 1 an die Greifersysteme 4, 19 aufrecht erhalten wird. Der vom bedruckten Bogen 5 überdeckte Raum zwischen den an den umlaufenden Transportketten angeordneten Greifersystemen 4, 19 und einer gegenüberliegenden tragenden Fläche der Abnahmetrommel 2 wird unmittelbar nach Übergabe des Bogens 5 an die Greifersysteme 4, 19 durch einen an den Greifersystemen 4, 19 fest oder radial nach außen verstellbaren oder aus dem Kettenradius heraussteuerbaren Bogenverdränger 3 überbrückt, dessen gekrümmte Stützfläche annähernd den Radius der tragenden Flächen des Trommelmantels der Abnahmetrommel 2 aufweist.According to the invention, this is done in that the tension in the sheet is maintained from the start of the transfer of the sheet 5 from the impression cylinder 1 to the gripper systems 4, 19. The space covered by the printed sheet 5 between the gripper systems 4, 19 arranged on the circulating transport chains and an opposite supporting surface of the take-up drum 2 becomes fixed or radial immediately after the sheet 5 is transferred to the gripper systems 4, 19 by one on the gripper systems 4, 19 bridged adjustable or out of the chain radius arch displacer 3 bridged, the curved support surface has approximately the radius of the supporting surfaces of the drum shell of the take-up drum 2.

Der Bogenverdränger 3 kann dabei vollflächig oder ausgespart sein und axial verstellbar ausgebildet sein.The arc displacer 3 can be full-surface or recessed and axially adjustable.

Die radiale Verstellmöglichkeit erlaubt es, einen geringen Wegfehler beim Lauf des Bogens 5, welcher aus dem radialen Unterschied zwischen der Greiferauflage 4 und dem Durchmesser der tragenden Flächen der Abnahmetrommel 2 resultiert auszugleichen, wenn bei Verarbeitung von dünnen Bogen 5 die Greiferauflage 4 über den Radius der tragenden Flächen des Trommelmantels der Abnahmetrommel 2 hinaus eingestellt ist.The radial adjustment option allows to compensate for a small path error during the running of the sheet 5, which results from the radial difference between the gripper pad 4 and the diameter of the supporting surfaces of the take-off drum 2, if the gripper pad 4 is processed over the radius of the thin sheet 5 bearing surfaces of the drum shell of the take-off drum 2 is also set.

Schließlich kann der Bogenverdränger 3 unmittelbar nach der Übergabe des bedruckten Bogens an die Greifersysteme 4, 19 der Transportketten aus dem Kettenradius der Umlenkkettenräder herausgesteuert werden. Hierzu sind gemäß Figur 2 und Figur 3 beidseitig auf der Welle der Abnahmetrommel 2 Steuerrollen 7 angeordnet, die unter Federkraft 8 auf Kurven 12 ablaufen. Die Steuerrollen 7 sind an beiden Enden einer Traverse 17 befestigt, welche den Bogenverdränger 3 bzw. einen steuerbaren Bogenverdrängerkamm 6 an einem Ende trägt. In Gelenken 9 werden der Bogenverdrängerkamm 6 bzw. der Bogenverdränger 3 am anderen Ende mit den Greifersystemen 4, 19 schwenkbar verbunden, um diese aus dem Kettenradius der Umlenkkettenräder kurvengesteuert auszuschwenken bzw. nachdem das Bogenende die Druckzone verlassen hat wieder zurückzuschwenken. Dadurch wird es möglich, den größeren Wegfehler beim verlangsamten Geradeauslaufen der Greifersysteme 4, 19 bis das Bogenende die Druckzone verlassen hat auszugleichen. Dadurch wird die bekannte Lockenbildung am Bogen 5 beseitigt. Außerdem ist die Abschmiergefahr verringert. Zugleich wird das Mitlaufen des Bogens insbesondere zum Bogenende hin am Gummizylinder verhindert, so daß der Bogen 5 dort nicht schädlich abgerissen werden kann. Abrißstreifen oder dergleichen Markierungen im Druckbild werden somit ebenfalls zuverlässig verhindert.Finally, the sheet displacer 3 can be controlled out of the chain radius of the deflection chain wheels immediately after the printed sheet has been transferred to the gripper systems 4, 19 of the transport chains. For this purpose, according to FIG. 2 and FIG. 3, control rollers 7 are arranged on both sides of the shaft of the take-up drum, which run on curves 12 under spring force 8. The control rollers 7 are attached to both ends of a cross member 17, which the bow displacer 3rd or carries a controllable sheet displacement comb 6 at one end. In joints 9, the bow displacement comb 6 or the bow displacer 3 is pivotally connected at the other end to the gripper systems 4, 19 in order to pivot them out of the chain radius of the deflection sprockets or after the bow end has left the pressure zone. This makes it possible to compensate for the larger path error when the gripper systems 4, 19 slowed down until the sheet end has left the printing zone. This eliminates the known curl formation on the arch 5. The risk of greasing is also reduced. At the same time the running of the sheet is prevented, in particular towards the end of the sheet on the rubber cylinder, so that the sheet 5 cannot be torn off there. Tear strips or similar markings in the printed image are thus also reliably prevented.

Damit der vom bedruckten Bogen 5 überdeckte Raum zwischen der vorderen Kante 14 der Abnahmetrommel 2 und den an den Transportketten angeordneten Greifersystemen 4, 19 unmittelbar mit Übergabe des Bogens 5 vom Druckzylinder 1 an die Greifersysteme 4, 19 am Bogenanfang beginnend völlig überbrückbar ist, sind gemäß Figur 2 bis 4 die gekrümmten Stützflächen des Bogenverdrängers 3 entweder als steuerbarer Bogenverdrängerkamm 6 oder als radial verstellbarer Bogenverdrängerkamm 16 und die mit diesen zusammenwirkenden tragenden Flächen des Trommelmantels der Abnahmetrommel 2 ineinandergreifend als Bogenträgerkamm 13 ausgebildet. Durch die Kammanordnung wird verhindert, daß die an den umlaufenden Greifersystemen 4, 19 befestigten Flächen des Bogenverdrängers 3 und die an der umlaufenden Abnahmetrommel 2 befestigten Flächen miteinander beim Einlaufen der Greifersysteme 4, 19 in den Bereich der Abnahmetrommel 2 bzw. beim Verlassen der Abnahmetrommel 2 infolge der vorhandenen Relativgeschwindigkeiten kollidieren. In der gekrümmten Stützfläche des Bogenverdrängers 3 bzw. der Bogenverdrängerkamm 6, 16 und /oder den tragenden Flächen des Trommelmantels der Abnahmetrommel 2 bzw. des Bogenträgerkammes 13 sind für eine abschmierfreie Bogenführung Elemente 18, z. B. Röllchen vorgesehen. Ebenso sind alle bekannten vergleichbaren Elemente zum Verhindern des Abschmierens einsetzbar, wie z. B. Bogenführungsringe, besondere Oberflächenbeschichtungen, Noppen, Bespannungen mit Super-Blue, Glasperlen oder anderen Aufzügen. Auch der zusätzliche Einsatz von Blasluft oder dergleichen wäre denkbar, ist aber nicht zwingend erforderlich.So that the space covered by the printed sheet 5 between the front edge 14 of the take-up drum 2 and the gripper systems 4, 19 arranged on the transport chains can be completely bridged starting with the transfer of the sheet 5 from the impression cylinder 1 to the gripper systems 4, 19 at the beginning of the sheet, according to Figure 2 to 4, the curved support surfaces of the sheet displacer 3 either as a controllable sheet displacement comb 6 or as a radially adjustable sheet displacement comb 16 and the cooperating bearing surfaces of the drum shell of the take-up drum 2 interlocking as a sheet carrier comb 13. The comb arrangement prevents the surfaces of the sheet displacer 3 fastened to the rotating gripper systems 4, 19 and the surfaces fastened to the rotating take-up drum 2 when the gripper systems 4, 19 enter the area of the take-up drum 2 or collide when leaving the take-up drum 2 due to the relative speeds present. In the curved support surface of the sheet displacer 3 or the sheet displacement comb 6, 16 and / or the load-bearing surfaces of the drum shell of the take-up drum 2 or the sheet support comb 13, elements 18, for. B. rolls are provided. Likewise, all known comparable elements can be used to prevent lubrication, such as. B. sheet guide rings, special surface coatings, knobs, covering with Super Blue, glass beads or other lifts. The additional use of blown air or the like would also be conceivable, but is not absolutely necessary.

Nachdem die Transportketten den Kettenradius der Abnahmetrommel 2 verlassen haben und sich auf einer geraden Wegstrecke weiterbewegen, liegt der Bogenanfang des Bogens 5 weiter satt an der gekrümmten Stützfläche des Bogenverdrängers 3 bzw. der Bogenverdrängerkämme 6, 16 an, so daß eine abschmier- und flatterfreie Bogenführung bis zur Aufhebung des Greiferschlusses im folgenden Druckwerk oder der Bogenauslage gewährleistet ist.After the transport chains have left the chain radius of the take-up drum 2 and continue to travel on a straight path, the beginning of the arc of the arch 5 lies more snugly against the curved support surface of the arch displacer 3 or the arch displacer combs 6, 16, so that a lubrication-free and flutter-free arch guide until the release of the gripper in the following printing unit or the sheet delivery is guaranteed.

Zusammenfassend bestehen die Vorteile der erfindungsgemäßen Lösung darin, daß in einer sehr einfachen und kostengünstigen Ausführung nach Übergabe des Bogens 5 an die Greifersysteme 4, 19 der Transportketten stets ein gleichmäßiger Zug durch Bogenverdrängung vom Bogenanfang her aufrechterhalten werden kann, wodurch kein Abschmieren der vorderen Trommelkante zu befürchten ist. Dieser Zug kann durch Heraussteuern des Bogenverdrängers aus dem Kettenradius auch aufrechterhalten werden, wenn der Bogenanfang bereits auf einer geraden Wegstrecke von den Umlenkkettenrädern langsam abläuft und das Bogenende sich noch in der Druckzone schneller bewegt. Außerdem ist ohne zusätzliche Maßnahmen gewährleistet, daß der Bogen 5 beim weiteren Transport bis zur Aufhebung des Greiferschlusses bei Übergabe im folgenden Druckwerk oder bei Auslage stets satt an den gekrümmten Stützflächen des Bogenverdrängers 3 bzw. der Bogenverdrängerkämme 6, 16 anliegt, wodurch die bereits angeführte flatterfreie und abschmierfreie Bogenführung auf der gesamten Wegstrecke des in Greifersystemen 4, 19 an Transportketten geführten Bogens 5 ermöglicht wird.In summary, the advantages of the solution according to the invention are that in a very simple and inexpensive embodiment after the sheet 5 has been transferred to the gripper systems 4, 19 of the transport chains, a uniform pull can always be maintained by displacement of the sheet from the beginning of the sheet, as a result of which no lubrication of the front drum edge occurs fear. This pull can also be maintained by steering the bend displacer out of the chain radius if the beginning of the bend already runs slowly on a straight path from the deflection sprockets and the end of the bend is still in the Pressure zone moves faster. In addition, it is ensured without additional measures that the sheet 5 always bears tightly against the curved support surfaces of the sheet displacer 3 or the sheet displacement combs 6, 16 during further transport until the removal of the gripper closure upon delivery in the following printing unit or during delivery, whereby the flutter-free combs 6, 16 already mentioned and lubrication-free sheet guidance over the entire path of the sheet 5 guided in gripper systems 4, 19 on transport chains is made possible.

BezugszeichenlisteReference symbol list

11
DruckzylinderPressure cylinder
22nd
AbnahmetrommelAcceptance drum
33rd
BogenverdrängerBow displacer
44th
GreiferauflageGripper pad
55
Bogenarc
66
steuerbarer Bogenverdrängerkammcontrollable bow displacement comb
77
SteuerrolleTax role
88th
Federfeather
99
Gelenkjoint
1010th
GreiferauflagespindelGripper support spindle
1111
GreiferwelleGripper shaft
1212
KurveCurve
1313
BogenträgerkammArch carrier comb
1414
vordere Kante der Abnahmetrommelfront edge of the take-off drum
1515
GreiferwagenGrab car
1616
einstellbarer Bogenverdrängerkammadjustable arch displacement comb
1717th
Traversetraverse
1818th
Element zum Verhindern des AbschmierensLubrication prevention element
1919th
GreiferGripper

Claims (7)

  1. Conveying device for a sheet fed rotary printing machine in which the printed sheets (5) are taken off from an impression cylinder (1) by means of gripper systems (4, 19) provided on circulating transport chains and are guided around a takeoff drum (2), the bearing surfaces of which include a part of the drum covering with an inclined edge (14) while, in another part of the drum covering, a sheet displacer (3) acts and which carries two reversing sprockets over which transport chains run, characterised in that sheet displacers (3) provided with elements (18) to prevent smearing off of the sheet are so arranged on the gripper systems (4, 19) provided on the circulating transport chains that the space bridged by the printed sheet between the gripper system (4, 19) and the front edge (14) of the takeoff drum (2) is directly bridged beginning with the start of the sheet with transfer of the sheet (5) from the impression cylinder (1) to the gripper system (4, 19).
  2. Conveying device according to Claim 1, characterised in that the curved support surface of the sheet displacer (3) is constructed as a full surface or relieved as desired.
  3. Conveying device according to Claim 1 and 2, characterised in that the sheet displacer (3) is arranged fixed or adjustably on the gripper systems (4, 19).
  4. Conveying device according to Claim 1 - 3, characterised in that the sheet displacer (3) is arranged axially and/or radially adjustable on the gripper systems (4, 19).
  5. Conveying device according to Claim 1 - 4, characterised in that the sheet displacer (3) can be controllable to be moved out from the chain radius of the reversing sprockets.
  6. Conveying device according to Claim 1 - 5, characterised in that the curved support surface of the sheet displacer (3) and a bearing surface of the takeoff drum (2) are constructed inter-engagingly in the form of sheet displacer comb (6, 16) and sheet support comb (13).
  7. Conveying device according to Claim 1 - 6, characterised in that the curved support surface of the sheet displacer (3, 6, 16) and/or the bearing surfaces of the drum cover of the takeoff drum (2) have elements (18) for preventing smearing off, e.g. smear-free surfaces, sheet guide rings, little rolls, textile or other flexible covers.
EP88100155A 1987-01-22 1988-01-08 Conveying device for a sheet-fed rotary printing machine Expired - Lifetime EP0275882B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88100155T ATE70495T1 (en) 1987-01-22 1988-01-08 CONVEYING DEVICE FOR A SHEET ROTARY PRINTING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3701767 1987-01-22
DE19873701767 DE3701767A1 (en) 1987-01-22 1987-01-22 CONVEYOR DEVICE FOR AN ARC ROTATION PRINTING MACHINE

Publications (3)

Publication Number Publication Date
EP0275882A2 EP0275882A2 (en) 1988-07-27
EP0275882A3 EP0275882A3 (en) 1989-12-13
EP0275882B1 true EP0275882B1 (en) 1991-12-18

Family

ID=6319298

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88100155A Expired - Lifetime EP0275882B1 (en) 1987-01-22 1988-01-08 Conveying device for a sheet-fed rotary printing machine

Country Status (5)

Country Link
US (1) US4858910A (en)
EP (1) EP0275882B1 (en)
JP (1) JPH0659732B2 (en)
AT (1) ATE70495T1 (en)
DE (2) DE3701767A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3930747A1 (en) * 1989-09-14 1991-03-28 Roland Man Druckmasch ARCH GUIDE DRUM IN ROTARY PRINTING MACHINES
DE4434624C2 (en) * 1994-09-28 1997-11-20 Heidelberger Druckmasch Ag Device for register correction and to compensate for tensioned sheets in the feeder of a sheet-fed rotary printing machine
DE19611124B4 (en) * 1996-03-21 2012-07-26 Heidelberger Druckmaschinen Ag Sheet transfer device of a sheet-fed rotary printing machine
DE10102226A1 (en) * 2001-01-19 2002-07-25 Heidelberger Druckmasch Ag Sheet transport drum
DE10157117A1 (en) * 2001-11-21 2003-05-28 Koenig & Bauer Ag Sheet delivery for a sheet processing machine
US20090035046A1 (en) * 2007-07-31 2009-02-05 Belbey Jason S Print drum
DE102007061556B4 (en) * 2007-12-18 2011-06-09 Kba-Metronic Aktiengesellschaft Transport cylinder, with movable gripper device and method for transporting sheets

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2111049A1 (en) * 1971-03-09 1972-09-21 Koenig & Bauer Schnellpressfab Chain boom for sheet-fed printing machines

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Publication number Priority date Publication date Assignee Title
DD76684A (en) *
US3334897A (en) * 1965-05-25 1967-08-08 Richard E Sharkey Method and apparatus for controlling curvature in printed sheets being withdrawn from an impression cylinder
DE2017417B2 (en) * 1970-04-11 1972-07-20 Maschf Augsburg Nuernberg Ag Sheet transfer drum on sheet-fed rotary offset printing machines
US4202268A (en) * 1973-11-22 1980-05-13 Heidelberger Druckmaschinen Aktiengesellschaft Transfer drum for printing presses with devices for gripping the leading and trailing edges of a sheet which is being imprinted
SE7701468L (en) * 1976-02-18 1977-08-19 Maschf Augsburg Nuernberg Ag BOJSTYV GRIPARVAGN, SPECIFICALLY INTENDED FOR OFFSET PRINTING MACHINES
DE2724621A1 (en) * 1977-06-01 1978-12-14 Maschf Augsburg Nuernberg Ag SHEET TURNING DEVICE OF A SHEET ROTARY PRINTING PRESS IN IN-LINE CONSTRUCTION
DE3036790C2 (en) * 1980-09-30 1982-11-11 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Sheet transfer drum for sheet-fed rotary printing machines that can be converted to perfecting
DE3114581C2 (en) * 1981-04-10 1984-01-19 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Conveyor device for a sheet-fed rotary printing press
DE3447596A1 (en) * 1984-12-28 1986-07-03 Heidelberger Druckmaschinen Ag, 6900 Heidelberg BOW TRANSFER CYLINDERS FOR BOW ROTARY PRINTING MACHINES
DE3508699A1 (en) * 1985-03-12 1986-09-25 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach HEIGHT-ADJUSTABLE GRIPPER PADS FOR REVERSE DRUM GRIPPERS IN REVERSIBLE DRUMS OF BEAUTIFUL AND REPRINTING MACHINES

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2111049A1 (en) * 1971-03-09 1972-09-21 Koenig & Bauer Schnellpressfab Chain boom for sheet-fed printing machines

Also Published As

Publication number Publication date
US4858910A (en) 1989-08-22
EP0275882A3 (en) 1989-12-13
DE3701767C2 (en) 1989-01-05
JPH0659732B2 (en) 1994-08-10
JPS63193839A (en) 1988-08-11
DE3701767A1 (en) 1988-08-04
ATE70495T1 (en) 1992-01-15
EP0275882A2 (en) 1988-07-27
DE3866881D1 (en) 1992-01-30

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