EP1878569B1 - Device for supporting sheet guiding in printing presses - Google Patents

Device for supporting sheet guiding in printing presses Download PDF

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Publication number
EP1878569B1
EP1878569B1 EP20070112412 EP07112412A EP1878569B1 EP 1878569 B1 EP1878569 B1 EP 1878569B1 EP 20070112412 EP20070112412 EP 20070112412 EP 07112412 A EP07112412 A EP 07112412A EP 1878569 B1 EP1878569 B1 EP 1878569B1
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EP
European Patent Office
Prior art keywords
sheet
printing machine
machine according
traction means
turned
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EP20070112412
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German (de)
French (fr)
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EP1878569A2 (en
EP1878569A3 (en
Inventor
Arndt Jentzsch
Gunter Peter
Günter Weisbach
Michael Koch
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Koenig and Bauer AG
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Koenig and Bauer Albert AG
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Publication of EP1878569A3 publication Critical patent/EP1878569A3/en
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    • 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
    • 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
    • B41F21/106—Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine
    • B41F21/108—Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine with pneumatic means

Definitions

  • the invention relates to a printing machine with a device for supporting the sheet guide wherein the printing press can be used either in straight printing or perfecting and the bow can be turned in the perfecting method according to the principle of trailing edge application, said on a cylinder with grippers guided sheet is detected and continued by a sheet transfer system of a turning drum.
  • the feed level e.g. the surface of the storage drum (three-drum turn) or the surface of the printing cylinder (single-drum turn) or the surface of a Leitrakel (also single-drum turn)
  • the following sheet is through the storage drum, impression cylinder or paradox of the Leitrakel itself and the one-stroke advancing, from the reversal of motion opposite moving turn arc brought by the inertia effect and aerodynamic forces of the rotating drum body and the paradox on the Leitrakel.
  • Another reason for the sheet encounter in the feed level is the use of air cushions against the greasing on the underside of the arch. The force acting in the direction of the turning arc of the air cushion can lead to pressing the turning arc to the next in the feed plane and thus for greasing between the two sheets.
  • a sheet guiding device in which the subsequent and the withdrawing sheet are separated from each other by mechanical means by the withdrawing sheet is pressed after its reversal by a rake from the feed plane of the Leitrakel in the effective range of the baffle.
  • the withdrawing sheet is directed at the leading edge, which has now become the trailing edge of the sheet, by means of a rake.
  • the length of the rake is limited by the condition that the foremost point of the rake must have taken the starting position behind the feeding plane of the sheet before the arrival of the subsequent sheet. Again, the leadership of the subtending bow is not enough to displace the volume of air from the forming bow wave and avoid contact of the turned with the following arc safely.
  • the object is achieved by a device having the features of the first claim.
  • the invention has the advantage that the turned sheet is pressed out of the path of the following sheet in the direction of the sheet withdrawal plane by the sheet stripping device.
  • a suction device is provided on the sheet wiper, with which the turned arc is temporarily sucked. This streamlines this bow.
  • the volume of air under the sheet to be turned is displaced, so that the formation of a bow wave is largely avoided.
  • the streamed away from the Leitrakel, streamlined bow is kept away from the action of the blow-suction air from the Leitrakler.
  • FIG. 1 At the one-drum turn after Fig. 1
  • a pressure cylinder 4 which in turn is a sheet guiding cylinder 5 downstream.
  • the direction of rotation of the cylinders is indicated by directional arrows.
  • the Leitrakel 6 is disposed over the width of the printing cylinder 4 and it is associated with the front part at a small distance from the periphery of the printing cylinder 4.
  • a baffle 7 is provided below the Leitrakel 6 at a distance from this. The baffle 7 has holes through which the turned-off sheet can be pneumatically acted upon.
  • the Bogenabstreif driving 8 consists of a circulating belt 9 on which a wedge-shaped Bogenabstreifelement 10 is arranged.
  • the drive of the belt 9 is not shown.
  • Fig. 4 is a further embodiment of the variant of the assignment of Bogenabstreifimplantation 10 shown to a plurality of rotating shafts, which are driven by a traction means 9.
  • the Bogenabstreifimplantation 10 are connected in parallel here via a parallel crank mechanism 18 with two shafts.
  • the bow to be turned 12 is applied in the operating mode perfecting on the printing cylinder 4 of the recto printing. Thereafter, the sheet 12 to be reversed passes through the tangent point of the printing cylinder 4 and turning drum 1, where the sheet 12 to be reversed sucked in the rear of the suction system 2 of the turning drum, passed under the periphery of the turning drum 1, passed to the gripper system 3 and the following, not shown Pressure cylinder turned is supplied, where the counterpressure takes place.
  • the sheet 12 to be turned is held by the gripper 11 of the printing cylinder 4.
  • Fig.1 opens the gripper 11 shortly before reaching the Leitrakel 6, the sheet to be turned 12 is released with its leading edge from the printing cylinder 4 in a known manner and guided along the Leitrakel 6.
  • the system of the sheet 12 to be turned on the Leitrakel 6 can be supported by emerging from blowing nozzles, between Leitrakel 6 and 12 to be turned arc blown air.
  • the wedge-shaped sheet scraping element 10 pivots in its orbit in front of the leading edge of the following sheet 12 to be deflected into the doctor blade plane and is transported in the sheet conveying direction with sheet speed to the sheet reversal point and constantly presses the turned arc 13 from the area of the Leitrakel 6 in the effective range of the baffle. 7

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  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Discharge By Other Means (AREA)

Description

Die Erfindung betrifft eine Druckmaschine mit einer Einrichtung zur Unterstützung der Bogenführung wobei die Druckmaschine wahlweise im Schöndruck oder im Schön- und Widerdruck einsetzbar ist und der Bogen im Schön- und Widerdruckverfahren nach dem Prinzip der Hinterkantenwendung gewendet werden kann, wobei der auf einem Zylinder mit Greifern geführte Bogen von einem Bogenübernahmesystem einer Wendetrommel erfasst und weitergeführt wird.The invention relates to a printing machine with a device for supporting the sheet guide wherein the printing press can be used either in straight printing or perfecting and the bow can be turned in the perfecting method according to the principle of trailing edge application, said on a cylinder with grippers guided sheet is detected and continued by a sheet transfer system of a turning drum.

Beim Wenden von Bogen im maximalen Formatbereich gibt es eine Phase, bei der sich Wende- und Folgebogen begegnen, d. h. sie liegen sich überdeckend mit mehr oder weniger Abstand in einer Ebene.When bowing in the maximum size range, there is a phase where turn and follow bends meet; H. they are overlapping with more or less distance in a plane.

Die Überdeckung ergibt sich aus dem optimalem Zylinderausnutzungskoeffizienten (Verhältnis Bogenlänge zu Zylinderumfang) von modernen Bogenoffsetdruckmaschinen einerseits und der gemeinsamen Nutzung des Speicherraumes durch Wende- und Folgebogen andererseits und ist für das Problem Bogenbegegnung ab einem Zylinderausnutzungskoeffizienten von ca. 60% relevant.The overlap results from the optimum cylinder utilization coefficient (ratio sheet length to cylinder circumference) of modern sheetfed offset presses on the one hand and the common use of the storage space by turning and following sheet on the other hand and is relevant to the problem Bogenbegegnung from a cylinder utilization coefficient of about 60%.

In die gemeinsame Ebene, die Zuführebene, z.B. die Oberfläche der Speichertrommel (Drei-Trommel-Wendung) oder die Oberfläche des Druckzylinders (Ein-Trommel-Wendung) oder die Oberfläche einer Leitrakel (ebenfalls Ein-Trommel-Wendung), wird der Folgebogen durch die Speichertrommel, Druckzylinder oder Paradoxon der Leitrakel selbst und der einen Takt voraneilende, ab der Bewegungsumkehr sich entgegengesetzt bewegende Wendebogen durch die Trägheitswirkung sowie aerodynamische Kräfte des rotierenden Trommelkörpers sowie das Paradoxon an der Leitrakel gebracht. Ein weiterer Grund für die Bogenbegegnung in der Zuführebene liegt in der Nutzung von Luftpolstern gegen das Abschmieren an der Bogenunterseite. Die in Richtung auf den Wendebogen wirkende Kraft des Luftpolsters kann zum Anpressen des Wendebogens an den in der Zuführebene befindlichen Folgebogen und damit zum Abschmieren zwischen beiden Bogen führen.In the common plane, the feed level, e.g. the surface of the storage drum (three-drum turn) or the surface of the printing cylinder (single-drum turn) or the surface of a Leitrakel (also single-drum turn), the following sheet is through the storage drum, impression cylinder or paradox of the Leitrakel itself and the one-stroke advancing, from the reversal of motion opposite moving turn arc brought by the inertia effect and aerodynamic forces of the rotating drum body and the paradox on the Leitrakel. Another reason for the sheet encounter in the feed level is the use of air cushions against the greasing on the underside of the arch. The force acting in the direction of the turning arc of the air cushion can lead to pressing the turning arc to the next in the feed plane and thus for greasing between the two sheets.

Um den Bogen in diesem Bereich sicher zu führen, ist in DE-OS 44 24 970 A vorgeschlagen worden, den gewendeten, abziehenden Bogen aus der Bogenbahn des ankommenden nächstfolgenden Bogens zu bringen indem, er mittels einer Saugeinrichtung an der Leitrakel zeitweilig angesaugt wird. Damit wird dieser Bogen zwischen Saugersystem/Greifersystem der Wendetrommel und Saugeinrichtung infolge seiner Zwangsführung gestrafft und aus der Bahn des nachfolgenden Bogens gebracht. Nachteilig an dieser Leiteinrichtung ist, dass der abziehende Bogen nur kurzzeitig von der Saugeinrichtung an der Leitrakel geführt werden kann. Spätestens wenn der nachfolgende Bogen mit seiner Vorderkante vor der Saugeinrichtung angelangt ist, muss die Saugluft in der Saugeinrichtung abgestellt und der Bogen freigegeben werden. Die nur kurze Zwangsführung reicht nicht aus, insbesondere von Bogen im großen Formatbereich oder bei schwerer Farbführung, um das Luftvolumen unter dem gewendeten Bogen ausreichend zu verdrängen und damit die Bildung einer Bogenwelle zu vermeiden. Eine Bogenbegegnung kann nicht sicher vermieden werden.To guide the bow safely in this area is in DE-OS 44 24 970 A has been proposed to bring the turned, peeling sheet from the sheet path of the incoming next sheet by being temporarily sucked by means of a suction device on the Leitrakel. Thus, this arc is tightened between suction system / gripper system of the beater and suction due to its forced operation and brought out of the path of the following sheet. A disadvantage of this guide is that the withdrawing sheet can be performed only briefly by the suction device on the Leitrakel. At the latest when the following bow with his Front edge reached in front of the suction device, the suction air in the suction device must be turned off and the sheet to be released. The short positive guidance is not sufficient, especially of sheets in the large format range or heavy color guide to displace the air volume under the inverted arc sufficiently and thus to avoid the formation of a bow wave. A bow encounter can not be safely avoided.

Aus der DE-OS 44 24 971 A ist eine Bogenleiteinrichtung bekannt, bei der der nachfolgende und der abziehende Bogen mit mechanischen Mitteln voneinander getrennt werden, indem der abziehende Bogen nach seiner Richtungsumkehr durch einen Rechen aus der Zuführebene der Leitrakel in den Wirkbereich des Leitbleches gedrückt wird. Für kurze Zeit wird der abziehende Bogen an der jetzt zur Bogenhinterkante gewordenen Vorderkante mittels Rechen geleitet. Die Länge des Rechens ist begrenzt durch die Bedingung, dass die vorderste Spitze des Rechens noch vor Eintreffen des nachfolgenden Bogens die Ausgangsstellung hinter der Zuführebene des Bogens eingenommen haben muss. Auch hier reicht die Führung des abziehenden Bogens nicht aus, um das Luftvolumen aus der sich bildenden Bogenwelle zu verdrängen und eine Berührung des gewendeten mit dem nachfolgenden Bogen sicher zu vermeiden.From the DE-OS 44 24 971 A a sheet guiding device is known in which the subsequent and the withdrawing sheet are separated from each other by mechanical means by the withdrawing sheet is pressed after its reversal by a rake from the feed plane of the Leitrakel in the effective range of the baffle. For a short time, the withdrawing sheet is directed at the leading edge, which has now become the trailing edge of the sheet, by means of a rake. The length of the rake is limited by the condition that the foremost point of the rake must have taken the starting position behind the feeding plane of the sheet before the arrival of the subsequent sheet. Again, the leadership of the subtending bow is not enough to displace the volume of air from the forming bow wave and avoid contact of the turned with the following arc safely.

Ausgehend von den Nachteilen aus dem Stand der Technik ist es Aufgabe der Erfindung, eine Vorrichtung zum Leiten von Bogen in Druckmaschinen zu schaffen, durch die eine Berührung des gewendeten abziehenden Bogens mit dem nachfolgenden zu wendenden Bogen vermieden wird.Based on the disadvantages of the prior art, it is an object of the invention to provide a device for guiding sheets in printing machines, by which a contact of the turned-off sheet is avoided with the subsequent sheet to be turned.

Erfindungsgemäß wird die Aufgabe durch eine Einrichtung mit den Merkmalen des 1. Anspruchs gelöst.According to the invention the object is achieved by a device having the features of the first claim.

Die Erfindung hat den Vorteil, dass durch die Bogenabstreifeinrichtung der gewendete Bogen aus der Bahn des nachfolgenden Bogens in Richtung der Bogenabzugsebene gedrückt wird.The invention has the advantage that the turned sheet is pressed out of the path of the following sheet in the direction of the sheet withdrawal plane by the sheet stripping device.

Damit wird eine Bogenbegegnung der beiden Bogen sicher vermieden.This avoids a bow encounter between the two sheets.

Vorteilhaft ist am Bogenabstreifer eine Saugeinrichtung vorgesehen, mit der der gewendete Bogen zeitweilig angesaugt wird. Damit wird dieser Bogen gestrafft. Das Luftvolumen unter dem zu wendenden Bogen wird verdrängt, sodass die Bildung einer Bogenwelle weitgehend vermieden wird. Der von der Leitrakel weg gedrückte, gestraffte Bogen wird von der Wirkung der Blas-Saug-Luft aus der Leitrakel ferngehalten.Advantageously, a suction device is provided on the sheet wiper, with which the turned arc is temporarily sucked. This streamlines this bow. The volume of air under the sheet to be turned is displaced, so that the formation of a bow wave is largely avoided. The streamed away from the Leitrakel, streamlined bow is kept away from the action of the blow-suction air from the Leitrakler.

Die Erfindung soll anhand eines Ausführungsbeispieles nachfolgend näher beschrieben werden. Die dazugehörigen Zeichnungen haben folgende Bedeutung:

Fig. 1
Schematische Darstellung einer Schön- und Widerdruckeinrichtung mit Eintrommelwendung: Bogenabstreifeinrichtung an der Leitrakel
Fig. 2
Schematische Darstellung einer nicht beanspruchten Schön- und Widerdruckeinrichtung mit Dreitrommelwendung: Bogenabstreifeinrichtung am Zylinder
Fig. 3
eine Ausführungsform der Bogenabstreifeinrichtung mit Scheibensegmenten
Fig. 4
eine Ausführungsform der Bogenabstreifeinrichtung mit Kurbelgetriebe
Fig. 5
eine Ausführungsform der nicht beanspruchten Bogenabstreifereinrichtung mit Saugeinrichtung
The invention will be described in more detail below with reference to an embodiment. The corresponding drawings have the following meaning:
Fig. 1
Schematic representation of a perfecting device with Eintrommelwendung: Bogenabstreifeinrichtung on the Leitrakel
Fig. 2
Schematic representation of an unclaimed perfecting device with three-drum application: Bogenabstreifeinrichtung the cylinder
Fig. 3
an embodiment of Bogenabstreifeinrichtung with disk segments
Fig. 4
an embodiment of Bogenabstreifeinrichtung with crank mechanism
Fig. 5
an embodiment of the unclaimed Bogenabstreifereinrichtung with suction

Bei der Ein-Trommel-Wendung nach Fig. 1 sind in bekannter Weise zwei sich jeweils gegenüberliegende korrelativ zusammenwirkende Sauger- und Greifersysteme 2, 3 vorgesehen. Der Wendetrommel 1 ist im Ausführungsbeispiel ein Druckzylinder 4 vorgeordnet, der wiederum einem Bogenführungszylinder 5 nachgelagert ist. Die Drehrichtung der Zylinder ist durch Drehrichtungspfeile gekennzeichnet.At the one-drum turn after Fig. 1 In a known manner, two mutually opposite correlatively cooperating suction and gripper systems 2, 3 are provided. The turning drum 1 is arranged in the embodiment, a pressure cylinder 4, which in turn is a sheet guiding cylinder 5 downstream. The direction of rotation of the cylinders is indicated by directional arrows.

Unterhalb des Druckzylinders 4 ist eine sich auch teilweise unter den Bogenführungszylinder 5 erstreckende Leitrakel 6 vorgesehen. Die Leitrakel 6 ist über die Breite des Druckzylinders 4 angeordnet und sie ist mit dem vorderen Teil im geringen Abstand der Peripherie des Druckzylinders 4 zugeordnet. Unterhalb der Leitrakel 6 ist im Abstand zu dieser ein Leitblech 7 vorgesehen. Das Leitblech 7 weist Bohrungen auf, über die der gewendete abziehende Bogen pneumatisch beaufschlagt werden kann.Below the printing cylinder 4 is also a part of the sheet guiding cylinder 5 extending Leitrakel 6 is provided. The Leitrakel 6 is disposed over the width of the printing cylinder 4 and it is associated with the front part at a small distance from the periphery of the printing cylinder 4. Below the Leitrakel 6 a baffle 7 is provided at a distance from this. The baffle 7 has holes through which the turned-off sheet can be pneumatically acted upon.

An der Leitrakel 6 ist eine Bogenabstreifeinrichtung 8 angeordnet. Die Bogenabstreifeinrichtung 8 besteht aus einem umlaufenden Band 9 auf dem ein keilförmiges Bogenabstreifelement 10 angeordnet ist. Der Antrieb des Bandes 9 ist nicht dargestellt.At the Leitrakel 6 a Bogenabstreifeinrichtung 8 is arranged. The Bogenabstreifeinrichtung 8 consists of a circulating belt 9 on which a wedge-shaped Bogenabstreifelement 10 is arranged. The drive of the belt 9 is not shown.

Wie aus der Figur 2 ersichtlich, ist bei einer nicht beanspruchten Einrichtung mit Dreitrommelwendung die Bogenabstreifeinrichtung 8 direkt am Zylinder 4 im Greiferkanal und taktweise unter die Zylinderoberfläche absenkbar angeordnet. Die Steuerung der Bogenabstreifeinrichtung 8 erfolgt durch ein Kurvengetriebe 15. Dem Kurvengetriebe 15 ist eine ortsfeste Kurve am Maschinengestell zugeordnet.Like from the FIG. 2 it can be seen, in a non-claimed device with three-drum turning the Bogenabstreifeinrichtung 8 directly on the cylinder 4 in the gripper channel and intermittently below the cylinder surface arranged lowered. The control of Bogenabstreifeinrichtung 8 is effected by a cam gear 15. The cam gear 15 is associated with a fixed curve on the machine frame.

Nach der in Fig. 3 dargestellten Variante sind anstelle des auf dem Zugmittel 9 angeordneten Bogenabstreifelementes 10 mehrere Wellen vorgesehen, die zueinander beabstandet sind und auf denen als Bogenabstreifelemente 10 dienende Scheibesegmente 14 vorgesehen sind. Die Scheibensegmente 14 sind über das Zugmittel 9 rotierend in Bewegungsrichtung des zu wendenden Bogens 12 antreibbar.After the in Fig. 3 illustrated variant, instead of the arranged on the traction means 9 Bogenabstreifelementes 10 a plurality of shafts are provided, which are spaced apart and on which serving as Bogenabstreifelemente 10 disk segments 14th are provided. The disk segments 14 are driven by the traction means 9 rotating in the direction of movement of the sheet 12 to be turned.

In Fig. 4 ist eine weitere Ausführungsform der Variante der Zuordnung der Bogenabstreifelemente 10 zu mehreren rotierenden Wellen dargestellt, die von einem Zugmittel 9 angetrieben werden. Die Bogenabstreifelemente 10 sind hier über ein Parallel-Kurbelgetriebe 18 mit zwei Wellen parallel verbunden.In Fig. 4 is a further embodiment of the variant of the assignment of Bogenabstreifelemente 10 shown to a plurality of rotating shafts, which are driven by a traction means 9. The Bogenabstreifelemente 10 are connected in parallel here via a parallel crank mechanism 18 with two shafts.

Fig. 5 zeigt eine nicht beanspruchte Ausführungsform einer Bogenabstreifeinrichtung 8 mit Saugeinrichtung 17. Fig. 5 shows an unclaimed embodiment of Bogenabstreifeinrichtung 8 with suction device 17th

Zur Wirkungsweise der erfindungsgemäßen Einrichtung:For the operation of the device according to the invention:

Auf bekannte Art wird dem zu wendenden Bogen 12 in der Betriebsart Schön- und Widerdruck auf dem Druckzylinder 4 der Schöndruck aufgebracht. Danach durchläuft der zu wendende Bogen 12 den Tangentenpunkt vom Druckzylinder 4 und Wendetrommel 1, wo der zu wendende Bogen 12 im hinteren Bereich vom Saugersystem 2 der Wendetrommel angesaugt, unter die Peripherie der Wendetrommel 1 geführt, an das Greifersystem 3 übergeben und dem nachfolgenden nicht dargestellten Druckzylinder gewendet zugeführt wird, wo der Widerdruck erfolgt.In a known way the bow to be turned 12 is applied in the operating mode perfecting on the printing cylinder 4 of the recto printing. Thereafter, the sheet 12 to be reversed passes through the tangent point of the printing cylinder 4 and turning drum 1, where the sheet 12 to be reversed sucked in the rear of the suction system 2 of the turning drum, passed under the periphery of the turning drum 1, passed to the gripper system 3 and the following, not shown Pressure cylinder turned is supplied, where the counterpressure takes place.

Während des Förderns auf dem Druckzylinder 4 wird der zu wendende Bogen 12 vom Greifer 11 des Druckzylinders 4 gehalten.During conveying on the printing cylinder 4, the sheet 12 to be turned is held by the gripper 11 of the printing cylinder 4.

Nach Fig.1 öffnet der Greifer 11 kurz vor Erreichen der Leitrakel 6, der zu wendende Bogen 12 wird mit seiner Vorderkante vom Druckzylinder 4 auf bekannte Art und Weise gelöst und an der Leitrakel 6 entlanggeführt. Die Anlage des zu wendenden Bogens 12 an der Leitrakel 6 kann durch aus Blasdüsen austretende, zwischen Leitrakel 6 und zu wendende Bogen 12 geblasene Luft unterstützt werden. Nach Ergreifen durch das Saugersystem 2 erfolgt die Bewegungsumkehr des nun gewendeten Bogens 13. Sobald der nachfolgende zu wendende Bogen 12 mit seiner Vorderkante in den Wenderaum einläuft schwenkt das keilförmige Bogenabstreifelement 10 auf seiner Umlaufbahn vor die Vorderkante des nachfolgenden zu wendenden Bogens 12 in die Leitrakelebene und wird in Bogenförderrichtung mit Bogengeschwindigkeit zum Bogenumkehrpunkt transportiert und drückt dabei stetig den gewendeten Bogen 13 aus dem Bereich der Leitrakel 6 in den Wirkbereich des Leitbleches 7.To Fig.1 opens the gripper 11 shortly before reaching the Leitrakel 6, the sheet to be turned 12 is released with its leading edge from the printing cylinder 4 in a known manner and guided along the Leitrakel 6. The system of the sheet 12 to be turned on the Leitrakel 6 can be supported by emerging from blowing nozzles, between Leitrakel 6 and 12 to be turned arc blown air. As soon as the following sheet 12 to be turned enters the turning space with its leading edge, the wedge-shaped sheet scraping element 10 pivots in its orbit in front of the leading edge of the following sheet 12 to be deflected into the doctor blade plane and is transported in the sheet conveying direction with sheet speed to the sheet reversal point and constantly presses the turned arc 13 from the area of the Leitrakel 6 in the effective range of the baffle. 7

Im Bogenumkehrpunkt schwenkt das Bogenabstreifelement 10 aus der Leitrakelebene und wird zurückgeführt.In Bogenumkehrpunkt the Bogenabstreifelement 10 pivots out of the Leitrakelebene and is returned.

Bei der nicht beanspruchte Einrichtung nach Fig. 2 wird das Bogenabstreifelement 10 durch die Drehung des Zylinders 4 vor die Vorderkante des nachfolgenden zu wendenden Bogens 12 bewegt. Da das Bogenabstreifelement 10 bei der Passage der Wendetrommel 1 deren Kappe gegenüber steht und so mit ihr kollidieren kann, ist es erforderlich mindestens in diesem Moment das Bogenabstreifelement 10 unter die Peripherie des Zylinders 4 abzusenken. Dies kann in einfacher Weise durch ein Kurvengetriebe 15 erfolgen, bei dem das Bogenabstreifelement 10 im Kanal des Zylinders 4 auf einer drehbeweglichen Welle zusammen mit einem Rollenhebel starr angeordnet ist, und das der seitlich angeordnete Rollenhebel während der Rotation des Zylinders 4 auf der steuernden Bahn einer gestellfesten Kurvenscheibe 16 abrollt und so über die Welle die über die Formatbreite verteilten Bogenabstreifelemente 10 nur im Moment des Funktionsbedarfes über die Peripherie des Zylinders 4 heraus und kurz danach wieder einschwenkt.At the unclaimed device after Fig. 2 the Bogenabstreifelement 10 is moved by the rotation of the cylinder 4 in front of the leading edge of the subsequent sheet to be turned 12. Since the Bogenabstreifelement 10 is in the passage of the turning drum 1 whose cap opposite and thus can collide with her, it is necessary at least in this moment the Bogenabstreifelement 10 lower below the periphery of the cylinder 4. This can be done in a simple manner by a cam gear 15, in which the Bogenabstreifelement 10 is rigidly mounted in the channel of the cylinder 4 on a rotatable shaft together with a roller lever, and the laterally arranged roller lever during the rotation of the cylinder 4 on the controlling path of a frame-fixed cam 16 unrolls and so on the shaft distributed over the format width Bogenabstreifelemente 10 only at the moment of functional demand on the periphery of the cylinder 4 out and shortly thereafter pivots.

Durch die Zuordnung einer Saugeinrichtung 17 zur Bogenabstreifeinrichtung 8 wird der abziehende, gewendete Bogen 13 zusätzlich gestrafft.By assigning a suction device 17 for Bogenabstreifeinrichtung 8 of the peeling, turned bow 13 is additionally tightened.

Aufstellung der verwendeten BezugszeichenList of used reference numbers

11
Wendetrommelbeater
22
Saugersystemsuction system
33
Greifersystemgripper system
44
Zylinder, Druckzylinder,Cylinder, pressure cylinder,
55
BogenführungszylinderSheet guiding cylinder
66
LeitrakelLeitrakel
77
Leitblechbaffle
88th
BogenabstreifeinrichtungBogenabstreifeinrichtung
99
Zugmittel, Band, KetteTraction means, band, chain
1010
BogenabstreifelementBogenabstreifelement
1111
Greifergrab
1212
Zu wendender BogenTo-turn bow
1313
Gewendeter BogenWanted bow
1414
Scheibensegmentdisk segment
1515
Kurvengetriebecam gear
1616
Kurvenscheibecam
1717
Saugeinrichtungsuction
1818
Parallel-KurbelgetriebeParallel crank mechanism

Claims (11)

  1. Printing machine with a device for assisting sheet guidance, wherein the printing machine is selectably usable in first forme printing and or in first forme and perfecting printing and the sheet can be turned in the first forme and perfecting printing method in accordance with the principle of rear edge turning, wherein the sheet (12), which is guided on a cylinder (4) with grippers (11) and which is to be turned, is gripped at the rear edge by a sheet take-over system (2, 3) of a turning drum (1) and conducted on and the front edge of the sheet (12) to be turned is conducted to a guide doctor blade (6) at which a sheet stripping device (8) is arranged, characterised in that the sheet stripping device (8) comprises at least one sheet stripping element (10) which is arranged to be movable in sheet running direction in such a manner that it leads the front edge of the succeeding sheet (12), which is guided along the guide doctor blade and which is to be turned, and strips the preceding sheet (12, 13) from the periphery of the guide doctor blade (6).
  2. Printing machine according to claim 1, characterised in that the sheet stripping device (8) consists of a traction means (9) circulating around at least two rollers and at least one sheet stripping element (10) associated with the traction means (9) and periodically protruding out of the guide surface of the guide doctor blade (6).
  3. Printing machine according to claim 2, characterised in that the sheet stripping element (10) is wedge-shaped.
  4. Printing machine according to claim 2, characterised in that the sheet stripping element (10) is arranged on the traction means (9) and movable in sheet conveying direction.
  5. Printing machine according to claim 2, characterised in that the sheet stripping device (8) consists of mutually spaced-apart shafts with sheet stripping elements (10) rotatably arranged thereon and the shafts are drivable by the traction means (9).
  6. Printing machine according to claim 5, characterised in that the sheet stripping element (10) is a rotatable disc segment (14).
  7. Printing machine according to claim 2, characterised in that the traction means (9) is a drivable chain.
  8. Printing machine according to claim 2, characterised in that the traction means (9) is a drivable belt.
  9. Printing machine according to claim 2, characterised in that the traction means (9) is moved at a speed matched to the sheet movement.
  10. Printing machine according to claim 2, characterised in that a suction device (17) is associated with the sheet stripping element (10).
  11. Printing machine according to claim 10, characterised in that the suction device (17) is cyclically acted on by suction air.
EP20070112412 2006-07-15 2007-07-13 Device for supporting sheet guiding in printing presses Active EP1878569B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610032922 DE102006032922B3 (en) 2006-07-15 2006-07-15 Sheet feeding assisting device for use in printing machine, has sheet stripping unit movably arranged in sheet running direction such that it anticipates front edge of subsequent sheet to be turned

Publications (3)

Publication Number Publication Date
EP1878569A2 EP1878569A2 (en) 2008-01-16
EP1878569A3 EP1878569A3 (en) 2008-09-17
EP1878569B1 true EP1878569B1 (en) 2010-10-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070112412 Active EP1878569B1 (en) 2006-07-15 2007-07-13 Device for supporting sheet guiding in printing presses

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EP (1) EP1878569B1 (en)
DE (2) DE102006032922B3 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008051093B4 (en) 2008-10-09 2021-10-21 Heidelberger Druckmaschinen Ag Device for turning a sheet inside out around a transverse axis during conveyance between two printing units of a printing machine
DE102015209687B4 (en) 2014-06-18 2020-07-02 Koenig & Bauer Ag Turning device and method for turning sheets
DE102015209689B4 (en) 2014-06-18 2021-03-25 Koenig & Bauer Ag Turning device for a sheet processing machine and method for turning sheets
DE102015209690B4 (en) 2014-06-18 2018-04-26 Koenig & Bauer Ag Turning device and method for turning sheets
DE102015209697B4 (en) 2015-05-27 2018-04-05 Koenig & Bauer Ag Sheet guiding cylinder and method of conveying a sheet in a sheet processing machine
DE102015209699B4 (en) * 2015-05-27 2018-06-07 Koenig & Bauer Ag Turning device and method for turning a sheet with a sheet guiding cylinder and an employed on the sheet guiding cylinder removal device
DE102015209700B4 (en) 2015-05-27 2018-06-07 Koenig & Bauer Ag Sheet guiding cylinder and method of conveying a sheet in a sheet processing machine
DE102018215386A1 (en) 2017-10-06 2019-04-11 Heidelberger Druckmaschinen Ag Printing machine with a turning device and a guide

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD101336A1 (en) * 1972-12-27 1973-11-12
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
DE4030070C2 (en) * 1990-09-22 1997-04-17 Kba Planeta Ag Sheet storage unit on rotary printing machines
DE4210327A1 (en) * 1992-03-30 1993-10-07 Koenig & Bauer Ag Sheet turning device in a rotary printing machine
DE9411462U1 (en) * 1994-07-15 1994-09-08 Kba-Planeta Ag, 01445 Radebeul Blowing device to support the sheet guidance
DE4424977C2 (en) * 1994-07-15 2000-08-10 Koenig & Bauer Ag Bow deflector
DE4424971C2 (en) * 1994-07-15 2002-06-13 Koenig & Bauer Ag Guiding device on sheet-fed rotary printing machines
DE4424972C2 (en) * 1994-07-15 1998-03-19 Kba Planeta Ag Installation on sheet-guiding cylinders
DE4424968C2 (en) * 1994-07-15 1997-12-11 Kba Planeta Ag Method and device for sheet guiding and sheet guiding during the turning process
DE4424970C2 (en) * 1994-07-15 1997-12-11 Kba Planeta Ag Pneumatically operating guide device for turning sheets
DE19940214B4 (en) * 1998-03-28 2014-03-06 Koenig & Bauer Aktiengesellschaft Leitrakel for sheet guiding in printing presses
DE10152875B4 (en) * 2000-11-21 2014-08-07 Heidelberger Druckmaschinen Ag Turning device with storage for flat material

Also Published As

Publication number Publication date
DE502007005317D1 (en) 2010-11-25
EP1878569A2 (en) 2008-01-16
EP1878569A3 (en) 2008-09-17
DE102006032922B3 (en) 2007-09-27

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