EP0704398A2 - Device for register correction and compensation of deformed sheets in the feeder of a sheet printing machine - Google Patents

Device for register correction and compensation of deformed sheets in the feeder of a sheet printing machine Download PDF

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Publication number
EP0704398A2
EP0704398A2 EP95113668A EP95113668A EP0704398A2 EP 0704398 A2 EP0704398 A2 EP 0704398A2 EP 95113668 A EP95113668 A EP 95113668A EP 95113668 A EP95113668 A EP 95113668A EP 0704398 A2 EP0704398 A2 EP 0704398A2
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EP
European Patent Office
Prior art keywords
gripper
eccentric
bridge
curve
axis
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.)
Withdrawn
Application number
EP95113668A
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German (de)
French (fr)
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EP0704398A3 (en
Inventor
Andreas Dr. Fricke
Heiner Luxem
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0704398A2 publication Critical patent/EP0704398A2/en
Publication of EP0704398A3 publication Critical patent/EP0704398A3/en
Withdrawn legal-status Critical Current

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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
    • B41F21/04—Grippers
    • B41F21/05—In-feed grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/10—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position

Definitions

  • the invention relates to a device for register correction and to compensate for tensioned sheets on the pre-gripper in the feeder of a sheet-fed rotary printing press according to the preamble of claim 1.
  • the curve is located on a ring enclosing the pre-gripper shaft and can be adjusted in its angular position by an actuator, so that the cam roller during the swiveling movement of the pre-gripper before reaching the end position in which the sheet grippers grip the bow at its front edge, depending on the setting of the curve sooner or later and less or more runs onto the curve and the gripper bridge experiences a deflection in the middle in the direction of the sheet transport.
  • the bend is deformed in the middle towards the ends in order to correct the register or to equalize the tension.
  • the deflection of the cam roller is smaller than the desired deflection of the gripper bridge, so that the force emanating from the curve and the cam roller must be greater than the force required to deform the gripper bridge. This increases the sensitivity of the system to dynamic ones Influences and requires a very sensitive adjustment mechanism.
  • the invention has for its object to provide a device for register correction and to compensate for tensioned sheets in the feeder of a sheet-fed rotary printing press with the features mentioned above in terms of their sensitivity to dynamic influences more cheaply and in a simple manner while the machine is running.
  • the invention solves this problem by training features according to the characterizing part of patent claim 1.
  • this design has the advantage that a comparatively large deflection of the cam roller attached to the eccentric with a lever arm causes a relatively small deformation of the carrier of the gripper bridge and thus of the gripper bridge itself.
  • This ratio of forces enables the shear force required to deform the gripper bridge to be reduced.
  • the required roller force compared to the transverse force is considerably smaller than in the known arrangement.
  • the force acting in the role is introduced directly into the machine frame via the cam body.
  • smaller deformations of kinetostatic and dynamic origin can be assumed due to the reduced frame force.
  • the dynamic repercussions of the gripper bridge on the mechanism for register correction or tension compensation in the arch are expediently absorbed by the action of a spring which secures the initial position of the gripper bridge in the undeformed state and the force of which is increased by the mechanism. This achieves a higher quality of the registration correction.
  • the curve is advantageously pivotable on the frame about an axis aligned parallel to the eccentric axis mounted on the machine and held adjustable in its swivel position by an actuator, this actuator being changeable while the machine is running in order to be able to regulate the cornering position.
  • Claims 2 to 7 contain advantageous features for a further embodiment of the invention.
  • the pre-gripper shaft 1 is pivotally supported with its two ends in the machine frame 2 in the direction of the sheet transport.
  • the ends of the gripper bridge 3 are supported on the pre-gripper shaft 1 in a torsionally rigid manner, this support, which is known per se, not being shown in the drawing.
  • swiveling sheet grippers 4 are mounted at a distance along the width of the sheet on a gripper shaft 5, which cooperate with a gripper pad 6 on the gripper bridge 3 and grasp the sheet to be transported on the feed table 7 at its front edge and between itself and the Clamp the hook support 6.
  • an eccentric 9 is mounted below the latter, the other bearing of which is supported in a support arm 10 formed on the pre-gripper shaft 1.
  • a cam roller 12 is freely rotatably supported, which rests with its circumference against a curve 13 of a cam body 14, which is pivotally mounted on the frame 2 about an axis 16 aligned parallel to the bearing axis 15 of the eccentric 9 and is adjustable in its swivel position by an adjusting screw 17.
  • a compression spring 18 loads the cam roller 12 in the direction against the curve 13 and thus the cam body 14 in the direction against the adjusting screw 17.
  • the adjusting screw 17, which is arranged in a thread fixed to the frame, can be adjusted while the machine is running. Outside the area where the cam roller 12 bears against the cam 13, a stop 19 causes a stop position against an adjusting screw 20 that can also be screwed into a thread that is fixed to the frame.
  • the pre-gripper After a sheet has been transported from the feed table 7 to the feed cylinder 8, the pre-gripper passes through a reverse position and then moves back to the feed table 7. Shortly before reaching the feed table, the cam roller 12 runs onto the cam 13 of the cam body 14. The curve flank is not equidistant from the center path 21 of the cam roller 12, so that the cam roller is continuously deflected from the stop position against the action of the spring 18 by the stop position which can be adjusted by means of the adjusting screw 20 and caused by the spring 18. When this causes the eccentric 9 to rotate about its bearing axis 15, the gripper bridge 3 is displaced substantially tangentially to the arc path of the bearing axis 15 and deformed in the process.
  • This deformation also bends the gripper shaft 5, so that the sheet grippers 4 arranged on the gripper shaft are also shifted accordingly.
  • the storage of the eccentric 9 in the Gripper bridge 3 or in a bridge support connected to it corresponds kinematically to a swivel joint, so that no torsional moment and only a transverse force is transmitted.
  • the shear force is passed through the so-called thrust center of the gripper bridge profile, so that the desired central deflection of the gripper bridge results transversely to the sheet running direction and no bridge torsion occurs.
  • This deflection can be regulated within the required limits by means of the adjusting screw 17.
  • the bow is then gripped at its front edge by the sheet grippers in the deformed position of the gripper bridge and the gripper shaft.
  • the cam roller 12 runs from the cam 13, so that the gripper bridge relaxes and deforms back into its starting position.
  • the sheet is transferred to the feed cylinder 8, the sheet remains deformed because the gripper bridge remains in the undeformed state, which is fixed by the stop 19 resting on the adjusting screw 20.
  • the bearing axis 15 of the eccentric 9 lies approximately in a plane conceived by the pre-gripper shaft axis and by the center of the gripper bridge or slightly offset to the side, as shown in the drawing.
  • the storage of the eccentric 9 and its support in the support arm 10 takes place in the embodiment just below the gripper bridge 3.
  • the lateral offset of the bearing axis 15 relative to the plane through the center of the pre-gripper shaft 1 and through the center of the gripper shaft 5 avoids the effect of torsional moments to the grab bridge 3.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Abstract

The mechanism has a grip bridge (3) that bends elastically, being supported at the ends on the initial grip shaft and swinging to and from in the sheet transport direction. The grip bridge has pivoting grips and a cam roller working against a stationary cam adjustable in the frame. A central support for the bridge on the shaft (1) has a joint containing an eccentric (9). The roller (12) is mounted clear of the eccentric by means of an arm (11) accommodated on the latter. The eccentric axis can be situated centrally in a plane through the grip shaft axis and the bridge centre. The eccentric can be arranged to turn from a position against an adjustable stop and against spring action (18) under the effect of the roller on the arm coupled to it.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zur Passerkorrektur und zum Ausgleich verspannter Bogen am Vorgreifer im Anleger einer Bogenrotationsdruckmaschine nach dem Oberbegriff des Patentanspruches 1.The invention relates to a device for register correction and to compensate for tensioned sheets on the pre-gripper in the feeder of a sheet-fed rotary printing press according to the preamble of claim 1.

Dieser Stand der Technik ergibt sich aus DE 88 16 641 U1. In der Figur 3 dieser Druckschrift ist eine Ausführungsform dargestellt, bei der die Kurvenrolle an einem Dreipunkthebel gelagert und dieser Dreipunkthebel einerseits schwenkbar an einem etwa mittig zwischen den beiden Endabstützungen der Greiferbrucke angeordneten, ebenfalls fest mit der Greiferbrücke verbundenen Stützarm gelagert ist und sich andererseits zwischen diesem Schwenklager und der Greiferbrücke gegen den Stützarm abstützt. Die Kurve befindet sich auf einem die Vorgreiferwelle umschließenden, in seiner Winkellage durch ein Stellglied einstellbaren Ring, so daß die Kurvenrolle bei der Schwenkbewegung des Vorgreifers vor dem Erreichen der Endposition, in der die Bogengreifer den Bogen an seiner Vorderkante erfassen, je nach Einstellung der Kurve früher oder später und weniger oder mehr auf die Kurve aufläuft und die Greiferbrücke dadurch in ihrer Mitte eine Durchbiegung in Richtung des Bogentransports erfährt. Der Bogen wird dadurch in der Mitte gegenüber den Enden deformiert, um eine Passerkorrektur oder einen Spannungsausgleich zu bewirken. Bei der bekannten Anordnung ist die Auslenkung der Kurvenrolle kleiner als die gewünschte Durchbiegung der Greiferbrücke, so daß die von der Kurve und der Kurvenrolle ausgehende Kraft größer sein muß als die zur Verformung der Greiferbrücke erforderliche Kraft. Das erhöht die Empfindlichkeit des Systems gegenüber dynamischen Einflüssen und erfordert einen sehr empfindlichen Einstellmechanismus.This prior art results from DE 88 16 641 U1. In Figure 3 of this document, an embodiment is shown in which the cam roller is mounted on a three-point lever and this three-point lever is pivotally mounted on a support arm which is arranged approximately centrally between the two end supports of the gripper bridge and is also firmly connected to the gripper bridge, and is located between the latter Swivel bearing and the gripper bridge is supported against the support arm. The curve is located on a ring enclosing the pre-gripper shaft and can be adjusted in its angular position by an actuator, so that the cam roller during the swiveling movement of the pre-gripper before reaching the end position in which the sheet grippers grip the bow at its front edge, depending on the setting of the curve sooner or later and less or more runs onto the curve and the gripper bridge experiences a deflection in the middle in the direction of the sheet transport. The bend is deformed in the middle towards the ends in order to correct the register or to equalize the tension. In the known arrangement, the deflection of the cam roller is smaller than the desired deflection of the gripper bridge, so that the force emanating from the curve and the cam roller must be greater than the force required to deform the gripper bridge. This increases the sensitivity of the system to dynamic ones Influences and requires a very sensitive adjustment mechanism.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur Passerkorrektur und zum Ausgleich verspannter Bogen im Anleger einer Bogenrotationsdruckmaschine mit den eingangs genannten Merkmalen hinsichtlich ihrer Empfindlichkeit gegen dynamische Einflüsse günstiger und bei laufender Maschine auf einfache weise einstellbar auszubilden.The invention has for its object to provide a device for register correction and to compensate for tensioned sheets in the feeder of a sheet-fed rotary printing press with the features mentioned above in terms of their sensitivity to dynamic influences more cheaply and in a simple manner while the machine is running.

Die Erfindung löst diese Aufgabe durch Ausbildungsmerkmale nach dem Kennzeichen des Patentanspruches 1.The invention solves this problem by training features according to the characterizing part of patent claim 1.

Gegenüber der bekannten Lösung hat diese Ausbildung den Vorteil, daß eine vergleichsweise große Auslenkung der mit einem Hebelarm am Exzenter befestigten Kurvenrolle eine relativ kleine Verformung des Trägers der Greiferbrücke und damit der Greiferbrücke selbst bewirkt. Durch diese übersetzung der Kräfte kann die zur Verformung der Greiferbrücke notwendige Querkraft verringert werden. Bei der erfindungsgemäßen Anordnung ist die erforderliche Rollenkraft gegenüber der Querkraft erheblich kleiner als bei der bekannten Anordnung. Die in der Rolle wirksame Kraft wird über den Kurvenkörper unmittelbar in das Maschinengestell eingeleitet. Bei der erfindungsgemäßen Ausbildung kann wegen der reduzierten Gestellkraft von kleineren Deformationen kinetostatischen und dynamischen Ursprungs ausgegangen werden. Die dynamischen Rückwirkungen der Greiferbrücke auf den Mechanismus zur Passerkorrektur bzw. zum Spannungsausgleich im Bogen werden zweckmäßig durch die Wirkung einer Feder zusätzlich abgefangen, die die Ausgangslage der Greiferbrücke im unverformten Zustand sichert und deren Kraft durch den Mechanismus verstärkt wird. Erreicht wird dadurch eine höhere Qualität der Passerkorrektur. Vorteilhaft wird die Kurve um eine parallel zur Exzenterachse ausgerichtete Achse schwenkbar am Gestell der Maschine gelagert und in ihrer Schwenklage durch ein Stellglied einstellbar gehalten, wobei dieses Stellglied bei laufender Maschine veränderbar ist, um eine Regulierung der Kurvenlage durchführen zu können.Compared to the known solution, this design has the advantage that a comparatively large deflection of the cam roller attached to the eccentric with a lever arm causes a relatively small deformation of the carrier of the gripper bridge and thus of the gripper bridge itself. This ratio of forces enables the shear force required to deform the gripper bridge to be reduced. In the arrangement according to the invention, the required roller force compared to the transverse force is considerably smaller than in the known arrangement. The force acting in the role is introduced directly into the machine frame via the cam body. In the embodiment according to the invention, smaller deformations of kinetostatic and dynamic origin can be assumed due to the reduced frame force. The dynamic repercussions of the gripper bridge on the mechanism for register correction or tension compensation in the arch are expediently absorbed by the action of a spring which secures the initial position of the gripper bridge in the undeformed state and the force of which is increased by the mechanism. This achieves a higher quality of the registration correction. The curve is advantageously pivotable on the frame about an axis aligned parallel to the eccentric axis mounted on the machine and held adjustable in its swivel position by an actuator, this actuator being changeable while the machine is running in order to be able to regulate the cornering position.

Vorteilhafte Merkmale zur weiteren Ausgestaltung der Erfindung enthalten die Ansprüche 2 bis 7.Claims 2 to 7 contain advantageous features for a further embodiment of the invention.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindungsmerkmale schematisch dargestellt. Es zeigen:

Figur 1
eine Seitenansicht mit einem Querschnitt durch die Greiferbrücke
Figur 2
eine gegenüber Figur um 90° versetzte Ansicht mit teilweisem Schnitt entlang der Linie II - II in Figur 1.
In the drawing, an embodiment of the features of the invention is shown schematically. Show it:
Figure 1
a side view with a cross section through the gripper bridge
Figure 2
a view offset by 90 ° with respect to figure with a partial section along the line II - II in Figure 1.

Die Vorgreiferwelle 1 ist mit ihren beiden Enden im Maschinengestell 2 in Richtung des Bogentransports hin und her schwenkbar gelagert. Auf der Vorgreiferwelle 1 ist die Greiferbrücke 3 mit ihren Enden verwindungssteif abgestützt, wobei diese an sich bekannte Abstützung in der Zeichnung nicht dargestellt ist. An der Greiferbrücke sind mit Abstand nebeneinander über die Breite des Bogens verteilt schwenkbare Bogengreifer 4 auf einer Greiferwelle 5 gelagert, die mit einer Greiferauflage 6 an der Greiferbrücke 3 zusammenwirken und den zu transportierenden Bogen auf dem Anlegetisch 7 an seiner Vorderkante erfassen und zwischen sich und der Greiferauflage 6 einklemmen. Mit einer Schwenkbewegung des Vorgreifers in Richtung des Bogentransports wird der Bogen vom Anlegetisch 7 transportiert und am Ende der Schwenkbewegung an das Greifersystem eines Zuführzylinders 8 übergeben.The pre-gripper shaft 1 is pivotally supported with its two ends in the machine frame 2 in the direction of the sheet transport. The ends of the gripper bridge 3 are supported on the pre-gripper shaft 1 in a torsionally rigid manner, this support, which is known per se, not being shown in the drawing. At the gripper bridge, swiveling sheet grippers 4 are mounted at a distance along the width of the sheet on a gripper shaft 5, which cooperate with a gripper pad 6 on the gripper bridge 3 and grasp the sheet to be transported on the feed table 7 at its front edge and between itself and the Clamp the hook support 6. With a swivel movement of the pre-gripper in the direction of the sheet transport, the sheet is transported from the feed table 7 and transferred to the gripper system of a feed cylinder 8 at the end of the swivel movement.

Etwa mittig zwischen den beiden Endabstützungen der gegebenenfalls durch einen Träger verstärkten Greiferbrücke 3 ist unter dieser ein Exzenter 9 gelagert, dessen anderes Lager sich in einem auf der Vorgreiferwelle 1 ausgebildeten Stützarm 10 abstützt. An einem mit dem Exzenter 9 fest verbundenen Arm 11 ist eine Kurvenrolle 12 frei drehbar gelagert, die sich mit ihrem Umfang gegen eine Kurve 13 eines Kurvenkörpers 14 anlegt, die um eine parallel zur Lagerachse 15 des Exzenters 9 ausgerichtete Achse 16 schwenkbar am Gestell 2 gelagert und durch eine Stellschraube 17 in ihrer Schwenklage einstellbar ist. Eine Druckfeder 18 belastet die Kurvenrolle 12 in Richtung gegen die Kurve 13 und damit den Kurvenkörper 14 in Richtung gegen die Stellschraube 17. Die in einem gestellfesten Gewinde angeordnete Stellschraube 17 ist bei laufender Maschine einstellbar. Außerhalb des Bereiches der Anlage der Kurvenrolle 12 an der Kurve 13 bewirkt ein Anschlag 19 eine Anschlaglage gegen eine ebenfalls in einem gestellfesten Gewinde verschraubbare Stellschraube 20.Approximately in the middle between the two end supports of the gripper bridge 3, which may be reinforced by a carrier, an eccentric 9 is mounted below the latter, the other bearing of which is supported in a support arm 10 formed on the pre-gripper shaft 1. On a fixed to the eccentric arm 11, a cam roller 12 is freely rotatably supported, which rests with its circumference against a curve 13 of a cam body 14, which is pivotally mounted on the frame 2 about an axis 16 aligned parallel to the bearing axis 15 of the eccentric 9 and is adjustable in its swivel position by an adjusting screw 17. A compression spring 18 loads the cam roller 12 in the direction against the curve 13 and thus the cam body 14 in the direction against the adjusting screw 17. The adjusting screw 17, which is arranged in a thread fixed to the frame, can be adjusted while the machine is running. Outside the area where the cam roller 12 bears against the cam 13, a stop 19 causes a stop position against an adjusting screw 20 that can also be screwed into a thread that is fixed to the frame.

Nach dem Transport eines Bogens vom Anlegetisch 7 zum Zuführzylinder 8 durchläuft der Vorgreifer eine Umkehrlage und bewegt sich anschließend zum Anlegetisch 7 zurück. Kurz vor dem Erreichen des Anlegetisches läuft die Kurvenrolle 12 auf die Kurve 13 des Kurvenkörpers 14 auf. Die Kurvenflanke ist nicht äquidistant zur Mittelpunktsbahn 21 der Kurvenrolle 12, so daß die Kurvenrolle aus der durch die mittels der Stellschraube 20 einstellbaren und durch die Feder 18 bewirkten Anschlaglage gegen die Wirkung der Feder 18 stetig ausgelenkt wird. Bei der dadurch bewirkten Verdrehung des Exzenters 9 um seine Lagerachse 15 wird die Greiferbrücke 3 im wesentlichen tangential zur Bogenbahn der Lagerachse 15 verschoben und dabei verformt. Durch diese Verformung verbiegt auch die Greiferwelle 5, so daß auch die auf der Greiferwelle angeordneten Bogengreifer 4 entsprechend verschoben werden. Die Lagerung des Exzenters 9 in der Greiferbrücke 3 bzw. in einem mit dieser verbundenen Brückenträger entspricht kinematisch einem Drehgelenk, so daß kein Torsionsmoment und lediglich eine Querkraft übertragen wird. Bei einer vorteilhaften Ausbildung dieser Lagerung wird die Querkraft durch den sogenannten Schubmittelpunkt des Greiferbrückenprofils geleitet, so daß sich die gewünschte mittige Durchbiegung der Greiferbrücke quer zur Bogenlaufrichtung ergibt und keine Brückentorsion eintritt. Wenn der Vorgreifer seine Endlage am Anlegetisch erreicht hat, liegt die maximale Durchbiegung der Greiferbrücke vor. Diese Durchbiegung läßt sich durch die Stellschraube 17 in erforderlichen Grenzen regulieren. Der Bogen wird dann an seiner Vorderkante von den Bogengreifern in der verformten Lage der Greiferbrücke und der Greiferwelle erfaßt. Beim Abschwenken des Vorgreifers vom Anlegetisch läuft die Kurvenrolle 12 von der Kurve 13 ab, so daß sich die Greiferbrücke entspannt und in ihre Ausgangslage zurückdeformiert. Bei der übergabe des Bogens an den Zuführzylinder 8 bleibt der Bogen weiterhin deformiert, weil die Greiferbrücke im unverformten, durch die Anlage des Anschlages 19 an der Stellschraube 20 fixierten Zustand verbleibt. Bei einer zur Ausbalancierung der Querkräfte in dem vorstehenden Sinne vorteilhaften Ausgestaltung der Erfindungsmerkmale liegt die Lagerachse 15 des Exzenters 9 etwa in einer durch die Vorgreiferwellenachse und durch die Greiferbrückenmitte gedachten Ebene oder leicht seitenversetzt zu dies er Ebene, wie es zeichnerisch dargestellt ist. Die Lagerung des Exzenters 9 und seine Abstützung in dem Stützarm 10 erfolgt bei dem Ausführungsbeispiel dicht unterhalb der Greiferbrücke 3. Der seitliche Versatz der Lagerachse 15 gegenüber der durch die Mitte der Vorgreiferwelle 1 und durch die Mitte der Greiferwelle 5 gedachten Ebene vermeidet das Wirksamwerden von Torsionsmomenten auf die Greiferbrücke 3.After a sheet has been transported from the feed table 7 to the feed cylinder 8, the pre-gripper passes through a reverse position and then moves back to the feed table 7. Shortly before reaching the feed table, the cam roller 12 runs onto the cam 13 of the cam body 14. The curve flank is not equidistant from the center path 21 of the cam roller 12, so that the cam roller is continuously deflected from the stop position against the action of the spring 18 by the stop position which can be adjusted by means of the adjusting screw 20 and caused by the spring 18. When this causes the eccentric 9 to rotate about its bearing axis 15, the gripper bridge 3 is displaced substantially tangentially to the arc path of the bearing axis 15 and deformed in the process. This deformation also bends the gripper shaft 5, so that the sheet grippers 4 arranged on the gripper shaft are also shifted accordingly. The storage of the eccentric 9 in the Gripper bridge 3 or in a bridge support connected to it corresponds kinematically to a swivel joint, so that no torsional moment and only a transverse force is transmitted. In an advantageous embodiment of this mounting, the shear force is passed through the so-called thrust center of the gripper bridge profile, so that the desired central deflection of the gripper bridge results transversely to the sheet running direction and no bridge torsion occurs. When the pre-gripper has reached its end position on the feed table, there is maximum deflection of the gripper bridge. This deflection can be regulated within the required limits by means of the adjusting screw 17. The bow is then gripped at its front edge by the sheet grippers in the deformed position of the gripper bridge and the gripper shaft. When the pre-gripper is pivoted away from the feed table, the cam roller 12 runs from the cam 13, so that the gripper bridge relaxes and deforms back into its starting position. When the sheet is transferred to the feed cylinder 8, the sheet remains deformed because the gripper bridge remains in the undeformed state, which is fixed by the stop 19 resting on the adjusting screw 20. In a configuration of the features of the invention which is advantageous for balancing the transverse forces in the above sense, the bearing axis 15 of the eccentric 9 lies approximately in a plane conceived by the pre-gripper shaft axis and by the center of the gripper bridge or slightly offset to the side, as shown in the drawing. The storage of the eccentric 9 and its support in the support arm 10 takes place in the embodiment just below the gripper bridge 3. The lateral offset of the bearing axis 15 relative to the plane through the center of the pre-gripper shaft 1 and through the center of the gripper shaft 5 avoids the effect of torsional moments to the grab bridge 3.

BezugszeichenlisteReference list

11
VorgreiferwellePre-gripper shaft
22nd
Gestellframe
33rd
GreiferbrückeGrab bridge
44th
BogengreiferBow grab
55
GreiferwelleGripper shaft
66
GreiferauflageGripper pad
77
AnlegetischFeed table
88th
ZuführzylinderFeed cylinder
99
Exzentereccentric
1010th
StützarmSupport arm
1111
Armpoor
1212th
KurvenrolleCam roller
1313
KurveCurve
1414
KurvenkörperCam body
1515
LagerachseBearing axis
1616
Achseaxis
1717th
StellschraubeSet screw
1818th
Federfeather
1919th
Anschlagattack
2020th
StellschraubeSet screw
2121
MittelpunktsbahnCenter railway

Claims (7)

Vorrichtung zur Passerkorrektur und zum Ausgleich verspannter Bogen am Vorgreifer im Anleger einer Bogenrotationsdruckmaschine, bei der zur elastischen Durchbiegung einer mit ihren beiden Enden verwindungssteif auf einer Vorgreiferwelle abgestützten und Schwenkbewegungen in Richtung des Bogentransports und zurück ausführenden Greiferbrücke in Richtung des Bogentransports vor der Bogenerfassung durch auf der Greiferbrücke nebeneinander angeordnete, um eine Greiferwellenachse schwenkbare Bogengreifer eine etwa mittig zwischen den Endabstützungen an der Greiferbrücke angeordnete, gestellfeste Abstützung auf der Vorgreiferwelle aufweist und mit einer Kurvenrolle auf eine gestellfest abgestützte und einstellbare Kurve aufläuft,
dadurch gekennzeichnet,
daß die mittige Abstützung der Greiferbrücke (3) auf der Vorgreiferwelle (1) ein Gelenk mit einem Exzenter (9) aufweist, an dem die Kurvenrolle (12) in einem Abstand von der Exzentermitte mit einem Hebelarm (11) gelagert ist.Device for register correction and compensation of tensioned sheets on the pre-gripper in the feeder of a sheet-fed rotary printing press, in which, for the elastic deflection of a torsionally rigid support with its two ends on a pre-gripper shaft and pivoting movements in the direction of the sheet transport and returning gripper bridge in the direction of the sheet transport before the sheet detection by on the Gripper bridge arranged next to one another, which can be pivoted about a gripper shaft axis, has a frame-fixed support on the pre-gripper shaft which is arranged approximately in the middle between the end supports on the gripper bridge and runs onto a curve-supported and adjustable curve with a cam roller.
characterized by
that the central support of the gripper bridge (3) on the pre-gripper shaft (1) has a joint with an eccentric (9) on which the cam roller (12) is mounted at a distance from the eccentric center with a lever arm (11). Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Exzenterachse etwa mittig in einer durch die Vorgreiferwellenachse und durch die Greiferbrückenmitte gedachten Ebene angeordnet ist.Device according to claim 1,
characterized by
that the eccentric axis is arranged approximately in the middle in a plane intended by the pre-gripper shaft axis and by the gripper bridge center. Vorrichtung nach den Ansprüchen 1 und 2,
dadurch gekennzeichnet,
daß der Exzenter (9) aus einer einstellbaren Anschlaglage heraus gegen die Wirkung einer Feder (18) durch das Zusammenwirken der Kurve (13) und der an dieser anliegenden, an dem mit dem Exzenter (9) verbundenen Arm (11) gelagerten Kurvenrolle (12) verdrehbar ist.Device according to claims 1 and 2,
characterized by
that the eccentric (9) from an adjustable stop position against the action of a spring (18) by the interaction of the curve (13) and the adjoining arm (11) mounted on the arm (11) connected to the eccentric (9) ) is rotatable. Vorrichtung nach den Ansprüchen 1 bis 3,
dadurch gekennzeichnet,
daß die Kurve (13) um eine parallel zur Exzenterachse ausgerichteten Achse (16) schwenkbar am Gestell (2) der Maschine gelagert und in ihrer Schwenklage durch ein Stellglied (17) einstellbar ist.Device according to claims 1 to 3,
characterized by
that the curve (13) is pivotable about an axis (16) aligned parallel to the eccentric axis on the frame (2) of the machine and its pivot position can be adjusted by an actuator (17). Vorrichtung nach den Ansprüchen 1 bis 4,
dadurch gekennzeichnet,
daß das Stellglied aus einer in einem gestellfesten Muttergewinde verschraubbaren und mit einem Ende gegen den Kurvenkörper (14) wirksamen Stellschraube (17) und aus einer die Kurve gegen das Ende der Stellschraube haltenden Feder (18) besteht.Device according to claims 1 to 4,
characterized by
that the actuator consists of a screw which can be screwed into a frame-fixed nut thread and which has one end against the cam body (14) and a spring (18) which holds the curve against the end of the adjusting screw. Vorrichtung nach den Ansprüchen 1 bis 4,
dadurch gekennzeichnet,
daß der Exzenter (9) in einem sich auf der Vorgreiferwelle (1) abstützenden Lager eines Stützarmes (10) dicht unterhalb der Greiferbrücke (3) gelagert ist.Device according to claims 1 to 4,
characterized by
that the eccentric (9) is mounted in a bearing of a support arm (10) which is supported on the pre-gripper shaft (1), just below the gripper bridge (3). Vorrichtung nach den Ansprüchen 1 bis 6,
dadurch gekennzeichnet,
daß die Exzenterachse gegenüber einer durch die Greiferbrückenmitte und durch die Vorgreiferwellenachse gedachten Ebene zur Kurve hin versetzt angeordnet ist.Device according to claims 1 to 6,
characterized by
that the eccentric axis is arranged offset to the curve with respect to a plane intended by the center of the gripper bridge and by the pre-gripper shaft.
EP95113668A 1994-09-28 1995-08-31 Device for register correction and compensation of deformed sheets in the feeder of a sheet printing machine Withdrawn EP0704398A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4434624 1994-09-28
DE4434624A DE4434624C2 (en) 1994-09-28 1994-09-28 Device for register correction and to compensate for tensioned sheets in the feeder of a sheet-fed rotary printing machine

Publications (2)

Publication Number Publication Date
EP0704398A2 true EP0704398A2 (en) 1996-04-03
EP0704398A3 EP0704398A3 (en) 1997-04-16

Family

ID=6529391

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95113668A Withdrawn EP0704398A3 (en) 1994-09-28 1995-08-31 Device for register correction and compensation of deformed sheets in the feeder of a sheet printing machine

Country Status (4)

Country Link
US (1) US5596929A (en)
EP (1) EP0704398A3 (en)
JP (1) JPH08104445A (en)
DE (1) DE4434624C2 (en)

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DE19611124B4 (en) * 1996-03-21 2012-07-26 Heidelberger Druckmaschinen Ag Sheet transfer device of a sheet-fed rotary printing machine
DE19616755C2 (en) * 1996-04-26 1999-12-16 Heidelberger Druckmasch Ag Drive for a vibrating pre-gripper of a sheet printing machine
DE19618029B4 (en) * 1996-05-04 2006-07-27 Heidelberger Druckmaschinen Ag Method and device for eliminating rhythmic register errors in sheetfed presses with multi-size cylinders
DE10003141A1 (en) * 2000-01-26 2001-08-02 Heidelberger Druckmasch Ag Transfer error compensation to printing machines
US6811336B2 (en) 2001-11-28 2004-11-02 Jostens, Inc. Registration cam for a printing press
US7337721B2 (en) 2002-01-16 2008-03-04 Jostens, Inc. Adjustable die fixture for a printing press
JP4592075B2 (en) * 2004-11-26 2010-12-01 アキヤマインターナショナル株式会社 Swing mechanism of offset printing machine
JP4496132B2 (en) * 2005-06-08 2010-07-07 アキヤマインターナショナル株式会社 Swing device for multicolor printing sheet offset printing machine
DE102006061431A1 (en) * 2006-12-23 2008-06-26 Koenig & Bauer Aktiengesellschaft Sheet position correction device has control shaft parallel to gripper shaft, fixed to rotary body to exert force on elastically deformable part when turned by eccentric element to displace bearing block to compensate sheet position error
DE102010054708A1 (en) * 2010-02-02 2011-08-04 Heidelberger Druckmaschinen AG, 69115 Deckmark height adjustment device
DE102016204221A1 (en) * 2015-04-20 2016-10-20 Heidelberger Druckmaschinen Ag Printing unit of a sheet-fed printing machine

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Also Published As

Publication number Publication date
JPH08104445A (en) 1996-04-23
DE4434624A1 (en) 1996-04-11
EP0704398A3 (en) 1997-04-16
DE4434624C2 (en) 1997-11-20
US5596929A (en) 1997-01-28

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