EP0958919A1 - Suction gripper in a sheet turning device of a rotary sheet printing machine - Google Patents

Suction gripper in a sheet turning device of a rotary sheet printing machine Download PDF

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Publication number
EP0958919A1
EP0958919A1 EP99107376A EP99107376A EP0958919A1 EP 0958919 A1 EP0958919 A1 EP 0958919A1 EP 99107376 A EP99107376 A EP 99107376A EP 99107376 A EP99107376 A EP 99107376A EP 0958919 A1 EP0958919 A1 EP 0958919A1
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EP
European Patent Office
Prior art keywords
sheet
suction
gripper
guiding cylinder
downstream
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.)
Granted
Application number
EP99107376A
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German (de)
French (fr)
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EP0958919B1 (en
Inventor
Willi Becker
Andreas Dr. Fricke
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of EP0958919A1 publication Critical patent/EP0958919A1/en
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Publication of EP0958919B1 publication Critical patent/EP0958919B1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F21/00Devices for conveying sheets through printing apparatus or machines
    • B41F21/10Combinations of transfer drums and grippers
    • B41F21/106Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine
    • B41F21/108Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine with pneumatic means

Definitions

  • the invention relates to a suction pad in a turning device Sheet-fed rotary printing machine according to the preamble of claim 1.
  • From DE-OS 38 29 626 is a sheet-fed rotary printing press with a Turning device known, in which a suction pad in the perfecting mode the periphery of a cylinder downstream of an impression cylinder to the Circumferential surface of the impression cylinder is pivoted where it traces the rear edge of the grips to be turned and this before passing the gripper centers between transferred the two cylinders to the periphery of the downstream cylinder.
  • a suction pad in the perfecting mode the periphery of a cylinder downstream of an impression cylinder to the Circumferential surface of the impression cylinder is pivoted where it traces the rear edge of the grips to be turned and this before passing the gripper centers between transferred the two cylinders to the periphery of the downstream cylinder.
  • a further generic turning device is known from EP 0 649 742 A1, at of the suction pads taking over the rear edge are designed as rotary suction cups due to their design and weight, however, not or only with great technical effort can be removed from the periphery of the downstream cylinder. As a result, it can be used, in particular, at the production printing speeds customary today in the perfecting mode there are problems with the handover, which contain a passport Impair handover.
  • the object of the invention is to achieve a suction cup in one To create a sheet-fed rotary printing machine, which for Take over the rear edge of the to be turned on a double large Impression cylinder guided sheet from the periphery of the downstream retracts the bow-guiding cylinder and is reliable and reliable when reversing effective axial smoothing of the sheet with simple and inexpensive means enables.
  • a turning device 1 comprises one Sheet-fed rotary printing machine 2 has a downstream sheet-guiding cylinder 4 (Turning drum) on which a suction pad 6 according to the invention is arranged, which for Acquisition of the rear edge 10 of a cylinder 12 that is guiding the sheet upstream guided sheet 14 from the periphery 8 of the downstream sheet-guiding cylinder 4th is pivoted out in a known manner, grips the rear edge 10 of the sheet 14 and feeds the cylinder 4, where the rear edge 10 of the sheet to a gripper device 16th of the cylinder 4 is passed.
  • a suction pad 6 according to the invention
  • a plurality of suction pads 6 Transverse direction across the width of the downstream sheet-guiding cylinder 4 arranged, each of which is located on a pivotable gripper shaft 18 attached bracket 20, at the end of a suction head 22 is arranged.
  • the suction heads 22 of the suction grippers 6 are preferred arranged between grippers 24 of the gripper device 16, which in a known manner associated gripper pads 26 cooperate.
  • 6 devices are arranged on the suction pads, which essentially in radial direction (see arrow 5 in Fig. 3) extending movement of the suction pads 6 at Swinging back or moving back in the direction of the periphery 8 of the downstream convert arc-guiding cylinder 4 into axially directed movements (arrow 28 in FIG. 2), which the trailing edge 10 of the sheet 14 before transfer to the gripper device 16 tension and smooth cylinder 4.
  • the means for Conversion of the radial movement of the suction pads 6 into axial movements by rolling formed in the form of rollers 30a either directly on the suction head 22 of the Suction pad 6 or in the form of rollers 30b rotatable on the holding arm 20 of the same are arranged, as shown schematically in Figs. 2 and 3.
  • the rollers 30a support each other Retraction of the suction heads 22 in the direction of the periphery 8 of the downstream arc-guiding cylinder 4 on inclined support surfaces 32, which in the Fig. 4 shown embodiment of the invention preferably on the Gripper pads 26 of the gripper device 16 are shaped. This will make the Suction heads 22 during the pivoting back movement before gripping the trailing edge 10 of the sheet by the grippers 24 of the gripper device 16 in the axial direction 28 by one predetermined span 34 preferably from the center 33 of the arc 14 in the direction the side edges 36, 38 of the sheet 14 stretched.
  • the Support surfaces 32 an essentially linear dependence of the clamping path 34, whereas in the case of a convex or indicated in Fig. 4 by dashed lines concave configuration of the support surfaces 32 a non-linear dependency ratio of the Span 34 is obtained.
  • the span 34 of the Centerline 33 of the arc increases toward the side edges 36, 38 what achieved, for example, by a different angle of inclination of the support surfaces 32 can be.
  • the Support surfaces 32 are preferably arranged in the area of the gripper pads 26, whereas in the case of the rollers 30b attached directly to the shaft 20 of the suction pads 6 in height of the rollers 30b immediately below the peripheral surface of the downstream one arc-guiding cylinder 4 can be shaped, as shown schematically in Fig. 2nd is indicated.
  • FIG. 5 it can also be provided instead of the rollers 30a, 30b on the suction head 22 or on the holding arm 20 of the To provide suction pads 6 sliding surfaces 31 which interact with the support surfaces 32, an axial movement 28 of the suction heads 22 by one, as previously described Bring span 34.
  • a friction-reducing material for example coated with Teflon.
  • the axial mobility of the Suction pad 6 enables the shaft 20, on which the Suction head 22 is attached, is flexible in the axial direction 28.
  • the shaft 20 For example, be formed as a flexible hollow tube, which, for example, from Can be made of metal or carbon fiber material.
  • the tube can at the same time also an elasticity or flexibility in the radial direction 5, d. H. in the direction have the peripheral surface of the downstream arc-guiding cylinder 4. This will automatically adapt the suction pads 6 according to the invention different paper thicknesses ensured, which ensures the accuracy of the transfer of the Trailing edge 10 and thus the print quality can be further increased.
  • the Suction gripper 6 has a rigid holding arm 240 which is firmly connected to the gripper shaft 218 and on which the suction head 222 via a rigid swivel arm 244 Pivotal point 242 is pivotally attached in the axial direction 28.
  • the rigid one Swivel arm 244 is used, for example, against the force of spring-elastic means 246 in Direction of the associated side edge 36, 38 of the sheet 14, the Return movement of the swivel arm 244 preferably by means of one in the rigid Holding arm 240 screwed adjusting screw 248 is limited.
  • the one with the Support surfaces 232 cooperating rollers 230a or sliding surfaces 230b, 231 are at This embodiment of the invention preferably directly on the suction head 222 arranged. In the same way, however, the roles or Arrange sliding surfaces on the rigid swivel arm 244, as shown by dashed lines in FIG. 6 Lines is indicated.
  • FIGS. 7a and 7b the suction gripper 6 according to the invention via a gripper shaft, not shown pivotable rigid support arm 340 on which the suction head 322 in axial Movable direction 28, for example in one arranged on the holding arm 340 Housing 323 is attached.
  • the suction head 322 against the spring elastic means 346 in the axial direction 28 Support surface 332 pushed, in this embodiment of the invention, the axial Movement of the suction head 322 preferably by a directly on the suction head 322 formed sliding surface 331 is generated, which extends out of the housing 323.
  • Resilient elements 350 may be provided, which in a in Fig. 7a and b schematically indicated radial guide 352 in the housing 323 guided suction head 322 in apply radial direction 5 with a resilient force, the stop to Limitation of the path, for example, directly through the top 354 of Housing 323 can be formed.

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

Abstract

The vacuum gripper (6) grips the back edge (10) of a sheet (14) guided from a front cylinder from the periphery of a subsequent cylinder, for turning the sheet. The vacuum gripper moves back radially towards the next cylinder and transfers the back edge of the sheet to a further pickup appliance (16). The return movement of the gripper is converted into axial movement by a roller (30a,30b) on the vacuum gripper or by a slide surface cooperating with a sloping support surface (32) on the cylinder.

Description

Die Erfindung betrifft einen Sauggreifer in einer Wendeeinrichtung einer Bogenrotationsdruckmaschine gemäß dem Oberbegriff von Anspruch 1.The invention relates to a suction pad in a turning device Sheet-fed rotary printing machine according to the preamble of claim 1.

Aus der DE-OS 38 29 626 ist eine Bogenrotationsdruckmaschine mit einer Wendeeinrichtung bekannt, bei der ein Sauggreifer im Schön- und Widerdruckbetrieb aus der Peripherie eines einem Gegendruckzylinder nachgeordneten Zylinders heraus an die Umfangsoberfläche des Gegendruckzylinders geschwenkt wird, wo er die Hinterkante des zu wendenden Bogens ergreift und diese vor dem Passieren der Greiferzentralen zwischen den beiden Zylindern in die Peripherie des nachgeordneten Zylinders überführt. In der beschriebenen Vorrichtung erfolgt keine axiale Glättung der Bogen nach der Übernahme durch den Sauggreifer, und aufgrund der starren und steifen Ausgestaltung des Sauggreifers und des fest vorgegebenen Schwenkweges ergeben sich bei der Verarbeitung unterschiedlich dicker Bedruckstoffe stark variierende Andrückkräfte, die zur Passerfehlern führen können.From DE-OS 38 29 626 is a sheet-fed rotary printing press with a Turning device known, in which a suction pad in the perfecting mode the periphery of a cylinder downstream of an impression cylinder to the Circumferential surface of the impression cylinder is pivoted where it traces the rear edge of the grips to be turned and this before passing the gripper centers between transferred the two cylinders to the periphery of the downstream cylinder. In the described device there is no axial smoothing of the sheet after the takeover due to the suction pad, and due to the rigid and rigid design of the suction pad and the fixed swivel path result from processing Printing materials of different thicknesses Varying pressing forces, which lead to register errors being able to lead.

Aus der EP 0 649 742 A1 ist eine weitere gattungsgemäße Wendeeinrichtung bekannt, bei der die die Hinterkante übernehmenden Sauggreifer als Drehsauger ausgebildet sind, die aufgrund ihrer Ausgestaltung und ihres Gewichts jedoch nicht oder nur mit großem technischen Aufwand aus der Peripherie des nachgeordneten Zylinders herausfahrbar sind. Hierdurch kann es insbesondere bei den heutzutage üblichen Fortdruckgeschwindigkeiten im Schön- und Widerdruckbetrieb zu Übergabeproblemen kommen, die eine passerhaltige Übergabe beeinträchtigen.A further generic turning device is known from EP 0 649 742 A1, at of the suction pads taking over the rear edge are designed as rotary suction cups due to their design and weight, however, not or only with great technical effort can be removed from the periphery of the downstream cylinder. As a result, it can be used, in particular, at the production printing speeds customary today in the perfecting mode there are problems with the handover, which contain a passport Impair handover.

Aus der DE 30 36 790 ist weiterhin eine nach dem Prinzip der Drei-Trommel-Wendung arbeitende Wendeeinrichtung mit einer Speichertrommel bekannt, bei der innerhalb der Peripherie der Speichertrommel angeordnete Sauggreifer, welche die Hinterkante des zu wendenden Bogens auf der Speichertrommel halten, in axialer Richtung entlang einer Führungsstange verschiebbar sind, um die Bogenhinterkante vor deren Übergabe an die nachgeordnete Wendetrommel axial zu glätten. Aufgrund des unterschiedlichen Wendeprinzips erfolgt bei der beschriebenen Vorrichtung keine axiale Straffung der Bogen während der Übergabe der Bogenhinterkante, und die Sauggreifer sind aufgrund ihrer vergleichsweise aufwendigen mechanischen Ausgestaltung und Führung innerhalb der Peripherie der Speichertrommel vergleichsweise schwer und nicht aus dieser herausfahrbar.From DE 30 36 790 is still a on the principle of three-drum turn working turning device known with a storage drum, in which within the Suction pads arranged around the periphery of the storage drum, which cover the rear edge of the Hold the turning arc on the storage drum, axially along one Guide bar are slidable to the trailing edge of the sheet before transferring it to the axially smoothing downstream turning drum. Because of the different In the device described, the principle of turning is not axially tightened during the transfer of the sheet trailing edge, and the suction pads are due to their comparatively complex mechanical design and leadership within the The periphery of the storage drum is comparatively heavy and cannot be moved out of it.

Durch die Erfindung soll die Aufgabe gelöst werden, einen Sauggreifer in einer Wendeeinrichtung einer Bogenrotationsdruckmaschine zu schaffen, welcher zur Übernahme der Hinterkante des zu wendenden, aufeinem doppelt großen Gegendruckzylinder geführten Bogens aus der Peripherie des nachgeordneten bogenführenden Zylinders herausfährt und beim Zurückfahren eine zuverlässige und effektive axiale Glättung des Bogens mit einfachen und kostengünstigen Mitteln ermöglicht.The object of the invention is to achieve a suction cup in one To create a sheet-fed rotary printing machine, which for Take over the rear edge of the to be turned on a double large Impression cylinder guided sheet from the periphery of the downstream retracts the bow-guiding cylinder and is reliable and reliable when reversing effective axial smoothing of the sheet with simple and inexpensive means enables.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale von Anspruch 1 gelöst. Weitere Merkmale der Erfindung sind in den Unteransprüchen enthalten.This object is achieved by the features of claim 1. Further Features of the invention are contained in the subclaims.

Die Erfindung wird nachfolgend mit Bezug auf die Zeichnungen anhand bevorzugter Ausführungsformen beschrieben.The invention is more preferred below with reference to the drawings Embodiments described.

In den Zeichnungen zeigen:

Fig. 1
eine schematische Darstellung einer Bogenrotationsdruckmaschine mit einer Wendeeinrichtung, welche einen erfindungsgemäßen Sauggreifer aufweist,
Fig. 2
eine schematische Aufsicht auf die Umfangsoberfläche eines in einer erfindungsgemäßen Wendeeinrichtung eingesetzten nachgeordneten bogenführenden Zylinders mit einer Vielzahl von an diesem angeordneten erfindungsgemäßen Sauggreifern,
Fig. 3
eine vergrößerte schematische Seitenansicht einer ersten Ausführungsform eines erfindungsgemäßen Sauggreifers während der Übernahme der Hinterkante eines zu wendenden Bogens,
Fig. 4
eine schematische Querschnittsansicht der Saugköpfe zweier erfindungsgemäßer Sauggreifer beim Überführen und axialen Spannen der Hinterkante eines zu wendenden Bogens,
Fig. 5
eine Querschnittsansicht durch den Saugkopf einer weiteren Ausführungsform eines erfindungsgemäßen Sauggreifers,
Fig. 6
eine schematische Aufsicht auf eine weitere Ausführungsform eines erfindungsgemäßen Sauggreifers, welche einen starren Haltearm aufweist, der an einer Greiferwelle in axialer Richtung schwenkbar befestigt ist und durch federelastische Mittel beaufschlagt wird,
Fig. 7a
eine Querschnittsansicht einer weiteren Ausführungsform eines erfindungsgemäßen Sauggreifers, bei der der Saugkopf beweglich an einem starren Haltearm des Sauggreifers befestigt ist und durch federelastische Mittel in axialer Richtung zur Mitte der Umfangsoberfläche des bogenführenden Zylinders hin gegen die Stützfläche gedrängt wird und
Fig. 7b
eine schematische Aufsicht aufden Saugkopf von Fig. 7a.
The drawings show:
Fig. 1
1 shows a schematic representation of a sheet-fed rotary printing press with a turning device which has a suction gripper according to the invention,
Fig. 2
2 shows a schematic top view of the peripheral surface of a downstream sheet-guiding cylinder used in a turning device according to the invention, with a plurality of suction pads according to the invention arranged thereon,
Fig. 3
an enlarged schematic side view of a first embodiment of a suction pad according to the invention while taking over the rear edge of a sheet to be turned,
Fig. 4
2 shows a schematic cross-sectional view of the suction heads of two suction cups according to the invention during the transfer and axial tensioning of the rear edge of a sheet to be turned,
Fig. 5
2 shows a cross-sectional view through the suction head of a further embodiment of a suction gripper according to the invention,
Fig. 6
1 shows a schematic plan view of a further embodiment of a suction gripper according to the invention, which has a rigid holding arm which is pivotally attached to a gripper shaft in the axial direction and is acted upon by spring-elastic means,
Fig. 7a
a cross-sectional view of a further embodiment of a suction gripper according to the invention, in which the suction head is movably attached to a rigid holding arm of the suction gripper and is urged by spring-elastic means in the axial direction towards the center of the peripheral surface of the sheet-guiding cylinder against the support surface and
Fig. 7b
a schematic plan view of the suction head of Fig. 7a.

Wie in Fig. 1 dargestellt, umfaßt eine Wendeeinrichtung 1 einer Bogenrotationsdruckmaschine 2 einen nachgeordneten bogenführenden Zylinder 4 (Wendetrommel), an dem ein erfindungsgemäßer Sauggreifer 6 angeordnet ist, der zur Übernahme der Hinterkante 10 eines auf einem vorgeordneten bogenführenden Zylinder 12 geführten Bogens 14 aus der Peripherie 8 des nachgeordneten bogenführenden Zylinders 4 in bekannter Weise herausgeschwenkt wird, die Hinterkante 10 des Bogens 14 ergreift und dem Zylinder 4 zuführt, wo die Hinterkante 10 des Bogens an eine Greifereinrichtung 16 des Zylinders 4 übergeben wird.As shown in Fig. 1, a turning device 1 comprises one Sheet-fed rotary printing machine 2 has a downstream sheet-guiding cylinder 4 (Turning drum) on which a suction pad 6 according to the invention is arranged, which for Acquisition of the rear edge 10 of a cylinder 12 that is guiding the sheet upstream guided sheet 14 from the periphery 8 of the downstream sheet-guiding cylinder 4th is pivoted out in a known manner, grips the rear edge 10 of the sheet 14 and feeds the cylinder 4, where the rear edge 10 of the sheet to a gripper device 16th of the cylinder 4 is passed.

Wie in Fig. 2 dargestellt ist, ist eine Vielzahl von erfindungsgemäßen Sauggreifern 6 in Querrichtung über die Breite des nachgeordneten bogenführenden Zylinders 4 hinweg angeordnet, von denen einjeder einen an einer verschwenkbaren Greiferwelle 18 befestigten Haltearm 20 aufweist, an dessen Ende ein Saugkopf 22 angeordnet ist.As shown in Fig. 2, a plurality of suction pads 6 according to the invention Transverse direction across the width of the downstream sheet-guiding cylinder 4 arranged, each of which is located on a pivotable gripper shaft 18 attached bracket 20, at the end of a suction head 22 is arranged.

Wie aus Fig. 2 entnehmbar ist, sind die Saugköpfe 22 der Sauggreifer 6 vorzugsweise zwischen Greifern 24 der Greifereinrichtung 16 angeordnet, die in bekannter Weise mit zugehörigen Greiferauflagen 26 zusammenwirken. Wie in Fig. 2 schematisch dargestellt ist, sind an den Sauggreifern 6 Einrichtungen angeordnet, die die im wesentlichen in radialer Richtung (vgl. Pfeil 5 in Fig. 3) verlaufende Bewegung der Sauggreifer 6 beim Zurückschwenken oder Zurückfahren in Richtung der Peripherie 8 des nachgeordneten bogenführenden Zylinders 4 in axial (Pfeil 28 in Fig. 2) gerichtete Bewegungen überführen, welche die Hinterkante 10 des Bogens 14 vor der Übergabe an die Greifereinrichtung 16 des Zylinders 4 spannen und glätten.As can be seen from FIG. 2, the suction heads 22 of the suction grippers 6 are preferred arranged between grippers 24 of the gripper device 16, which in a known manner associated gripper pads 26 cooperate. As shown schematically in Fig. 2 is, 6 devices are arranged on the suction pads, which essentially in radial direction (see arrow 5 in Fig. 3) extending movement of the suction pads 6 at Swinging back or moving back in the direction of the periphery 8 of the downstream convert arc-guiding cylinder 4 into axially directed movements (arrow 28 in FIG. 2), which the trailing edge 10 of the sheet 14 before transfer to the gripper device 16 tension and smooth cylinder 4.

Gemäß einer ersten bevorzugten Ausführungsform der Erfindung werden die Mittel zur Überführung der radialen Bewegung der Sauggreifer 6 in axiale Bewegungen durch Rollen gebildet, die in Form von Rollen 30a entweder unmittelbar am Saugkopf 22 des Sauggreifers 6 oder aber in Form von Rollen 30b am Haltearm 20 desselben drehbar angeordnet sind, wie dies in Fig. 2 und 3 schematisch dargestellt ist.According to a first preferred embodiment of the invention, the means for Conversion of the radial movement of the suction pads 6 into axial movements by rolling formed in the form of rollers 30a either directly on the suction head 22 of the Suction pad 6 or in the form of rollers 30b rotatable on the holding arm 20 of the same are arranged, as shown schematically in Figs. 2 and 3.

Wie in Fig. 4 anhand der Rollen 30a im Detail gezeigt ist, stützen sich die Rollen 30a beim Zurückfahren der Saugköpfe 22 in Richtung der Peripherie 8 des nachgeordneten bogenführenden Zylinders 4 an schräg verlaufenden Stützflächen 32 ab, die bei der in Fig. 4 dargestellten Ausführungsform der Erfindung vorzugsweise an den Greiferauflagen 26 der Greifereinrichtung 16 geformt sind. Hierdurch werden die Saugköpfe 22 bei der Rückschwenkbewegung vor dem Ergreifen der Bogenhinterkante 10 durch die Greifer 24 der Greifereinrichtung 16 in axialer Richtung 28 um einen vorgegebenen Spannweg 34 vorzugsweise von der Mitte 33 des Bogens 14 aus in Richtung der Seitenränder 36, 38 des Bogens 14 gespannt.As shown in Fig. 4 with reference to the rollers 30a, the rollers 30a support each other Retraction of the suction heads 22 in the direction of the periphery 8 of the downstream arc-guiding cylinder 4 on inclined support surfaces 32, which in the Fig. 4 shown embodiment of the invention preferably on the Gripper pads 26 of the gripper device 16 are shaped. This will make the Suction heads 22 during the pivoting back movement before gripping the trailing edge 10 of the sheet by the grippers 24 of the gripper device 16 in the axial direction 28 by one predetermined span 34 preferably from the center 33 of the arc 14 in the direction the side edges 36, 38 of the sheet 14 stretched.

Durch die Ausgestaltung der Kontur der Stützflächen 32 kann hierbei die Abhängigkeit des Spannweges 34 vom Rückschwenkweg der Sauggreifer 6 den jeweiligen Bedürfnissen angepaßt werden. So ergibt sich beispielsweise bei einer geraden Ausgestaltung der Stützflächen 32 eine im wesentlichen lineare Abhängigkeit des Spannweges 34, wohingegen im Falle einer in Fig. 4 durch gestrichelte Linien angedeuteten konvexen oder konkaven Ausgestaltung der Stützflächen 32 ein nicht-lineares Abhängigkeitsverhältnis des Spannweges 34 erhalten wird. Weiterhin kann es vorteilhaft sein, wenn bei einer in Fig. 2 dargestellten Vielzahl von erfindungsgemäßen Sauggreifern 6 der Spannweg 34 von der Mittellinie 33 des Bogens aus zu den Seitenrändern 36, 38 hin zunimmt, was beispielsweise durch einen unterschiedlichen Neigungswinkel der Stützflächen 32 erreicht werden kann.Due to the design of the contour of the support surfaces 32, the dependence of the Clamping path 34 from the swing-back path of the suction pads 6 to the respective needs be adjusted. For example, in the case of a straight configuration, the Support surfaces 32 an essentially linear dependence of the clamping path 34, whereas in the case of a convex or indicated in Fig. 4 by dashed lines concave configuration of the support surfaces 32 a non-linear dependency ratio of the Span 34 is obtained. Furthermore, it can be advantageous if, in the case of one in FIG illustrated plurality of suction pads 6 of the invention, the span 34 of the Centerline 33 of the arc increases toward the side edges 36, 38 what achieved, for example, by a different angle of inclination of the support surfaces 32 can be.

Im Falle der unmittelbar an den Saugköpfen 22 angeordneten Rollen 30a sind die Stützflächen 32 vorzugsweise im Bereich der Greiferauflagen 26 angeordnet, wohingegen sie im Falle der unmittelbar am Schaft 20 der Sauggreifer 6 befestigten Rollen 30b in Höhe der Rollen 30b unmittelbar unterhalb der Umfangsoberfläche des nachgeordneten bogenführenden Zylinders 4 geformt sein können, wie dies schematisch in Fig. 2 angedeutet ist.In the case of the rollers 30a arranged directly on the suction heads 22, the Support surfaces 32 are preferably arranged in the area of the gripper pads 26, whereas in the case of the rollers 30b attached directly to the shaft 20 of the suction pads 6 in height of the rollers 30b immediately below the peripheral surface of the downstream one arc-guiding cylinder 4 can be shaped, as shown schematically in Fig. 2nd is indicated.

Gemäß einer in Fig. 5 dargestellten Ausführungsform der Erfindung kann es ferner vorgesehen sein, anstelle der Rollen 30a, 30b am Saugkopf 22, bzw. am Haltearm 20 der Sauggreifer 6 Gleitflächen 31 vorzusehen, die mit den Stützflächen 32 zusammenwirken, um wie zuvor beschrieben eine axiale Bewegung 28 der Saugköpfe 22 um einen Spannweg 34 herbeizuführen. Zur Erzielung einer leichteren Gleitbewegung und einer Verringerung der zur Erzeugung der axialen Bewegung benötigten Kräfte kann es vorgesehen sein, die Gleitflächen 31 an den Saugern und/oder die Stützflächen 32 mit einem reibungsvermindernden Material, beispielsweise mit Teflon zu beschichten. According to an embodiment of the invention shown in FIG. 5, it can also be provided instead of the rollers 30a, 30b on the suction head 22 or on the holding arm 20 of the To provide suction pads 6 sliding surfaces 31 which interact with the support surfaces 32, an axial movement 28 of the suction heads 22 by one, as previously described Bring span 34. To achieve an easier sliding movement and one It can reduce the forces required to generate the axial movement be provided with the sliding surfaces 31 on the suction cups and / or the support surfaces 32 a friction-reducing material, for example coated with Teflon.

Bei der bevorzugten Ausführungsform der Erfindung wird die axiale Beweglichkeit des erfindungsgemäßen Sauggreifers 6 dadurch ermöglicht, daß der Schaft 20, an welchem der Saugkopf 22 befestigt ist, in axialer Richtung 28 flexibel ist. Hierzu kann der Schaft 20 beispielsweise als ein flexibles Hohlröhrchen ausgebildet sein, welches beispielsweise aus Metall oder aus Kohlenfaserwerkstoff gefertigt sein kann. Das Röhrchen kann jedoch gleichzeitig auch eine Elastizität oder Flexibilität in radialer Richtung 5, d. h. in Richtung der Umfangsoberfläche des nachgeordneten bogenführenden Zylinders 4 besitzen. Hierdurch wird eine automatische Anpassung der erfindungsgemäßen Sauggreifer 6 an unterschiedliche Papierstärken sichergestellt, wodurch die Genauigkeit der Übergabe der Bogenhinterkante 10 und damit die Druckqualität weiter erhöht werden können.In the preferred embodiment of the invention, the axial mobility of the Suction pad 6 according to the invention enables the shaft 20, on which the Suction head 22 is attached, is flexible in the axial direction 28. For this purpose, the shaft 20 For example, be formed as a flexible hollow tube, which, for example, from Can be made of metal or carbon fiber material. However, the tube can at the same time also an elasticity or flexibility in the radial direction 5, d. H. in the direction have the peripheral surface of the downstream arc-guiding cylinder 4. This will automatically adapt the suction pads 6 according to the invention different paper thicknesses ensured, which ensures the accuracy of the transfer of the Trailing edge 10 and thus the print quality can be further increased.

Gemäß einer weiteren, in Fig. 6 dargestellten Ausführungsform der Erfindung weist der Sauggreifer 6 einen starren Haltearm 240 auf, der mit der Greiferwelle 218 fest verbunden ist und an dem der Saugkopf 222 über einen starren Schwenkarm 244 um einen Drehpunkt 242 in axialer Richtung 28 verschwenkbar befestigt ist. Der starre Schwenkarm 244 wird beispielsweise gegen die Kraft federelastischer Mittel 246 in Richtung des zugehörigen Seitenrandes 36, 38 des Bogens 14 gedrängt, wobei die Rückbewegung des Schwenkarmes 244 vorzugsweise mittels einer in den starren Haltearm 240 eingedrehten Justierschraube 248 begrenzt wird. Die mit den Stütztflächen 232 zusammenwirkenden Rollen 230a oder Gleitflächen 230b, 231 sind bei dieser Ausführungsform der Erfindung vorzugsweise unmittelbar am Saugkopf 222 angeordnet. In gleicher Weise kann es jedoch auch vorgesehen sein, die Rollen oder Gleitflächen am starren Schwenkarm 244 anzuordnen, wie dies in Fig. 6 durch gestrichelte Linien angedeutet ist.According to a further embodiment of the invention shown in FIG. 6, the Suction gripper 6 has a rigid holding arm 240 which is firmly connected to the gripper shaft 218 and on which the suction head 222 via a rigid swivel arm 244 Pivotal point 242 is pivotally attached in the axial direction 28. The rigid one Swivel arm 244 is used, for example, against the force of spring-elastic means 246 in Direction of the associated side edge 36, 38 of the sheet 14, the Return movement of the swivel arm 244 preferably by means of one in the rigid Holding arm 240 screwed adjusting screw 248 is limited. The one with the Support surfaces 232 cooperating rollers 230a or sliding surfaces 230b, 231 are at This embodiment of the invention preferably directly on the suction head 222 arranged. In the same way, however, the roles or Arrange sliding surfaces on the rigid swivel arm 244, as shown by dashed lines in FIG. 6 Lines is indicated.

Gemäß einer weiteren, in Fig. 7a und 7b gezeigten Ausführungsform der Erfindung, weist der erfindungsgemäße Sauggreifer 6 einen über eine nicht dargestellte Greiferwelle verschwenkbaren starren Haltearm 340 auf, an dem der Saugkopf 322 in axialer Richtung 28 beweglich, beispielsweise in einem am Haltearm 340 angeordneten Gehäuse 323, befestigt ist. Wie in der Querschnittsansicht von Fig. 7a dargestellt ist, wird der Saugkopf 322 über federelastische Mittel 346 in axialer Richtung 28 gegen die Stützfläche 332 gedrängt, wobei bei dieser Ausführungsform der Erfindung die axiale Bewegung des Saugkopfes 322 vorzugsweise durch eine unmittelbar am Saugkopf 322 gebildete Gleitfläche 331 erzeugt wird, die sich aus dem Gehäuse 323 heraus erstreckt. Wie in Fig. 7a ferner gezeigt ist, können zur Sicherstellung einer automatischen Anpassung des erfindungsgemäßen Sauggreifers an verschiedene Bedruckstoffstärken weitere federelastische Elemente 350 vorgesehen sein, die den in einer in Fig. 7a und b schematisch angedeuteten Radialführung 352 im Gehäuse 323 geführten Saugkopf 322 in radialer Richtung 5 mit einer federelastischen Kraft beaufschlagen, wobei der Anschlag zur Begrenzung des Weges beispielsweise unmittelbar durch die Oberseite 354 des Gehäuses 323 gebildet sein kann.According to a further embodiment of the invention shown in FIGS. 7a and 7b the suction gripper 6 according to the invention via a gripper shaft, not shown pivotable rigid support arm 340 on which the suction head 322 in axial Movable direction 28, for example in one arranged on the holding arm 340 Housing 323 is attached. As shown in the cross-sectional view of Fig. 7a the suction head 322 against the spring elastic means 346 in the axial direction 28 Support surface 332 pushed, in this embodiment of the invention, the axial Movement of the suction head 322 preferably by a directly on the suction head 322 formed sliding surface 331 is generated, which extends out of the housing 323. How 7a is also shown in order to ensure automatic adaptation of the Suction pad according to the invention to different substrate thicknesses Resilient elements 350 may be provided, which in a in Fig. 7a and b schematically indicated radial guide 352 in the housing 323 guided suction head 322 in apply radial direction 5 with a resilient force, the stop to Limitation of the path, for example, directly through the top 354 of Housing 323 can be formed.

Weiterhin besteht die Möglichkeit, die axiale Spannbewegung der Sauggreifer gleichzeitig mit einer Spannbewegung der Sauggreifer in Umfangsrichtung zu kombinieren, die z. B. durch eine entsprechende Auslegung das die Sauggreifer verschwenkenden Getriebes erfolgen kann, so daß sich insgesamt eine Straffung des Bogens 14 in Diagonalrichtung ergibt. There is also the possibility of simultaneous axial clamping movement of the suction pads to combine with a clamping movement of the suction pads in the circumferential direction, the z. B. through a corresponding design of the gear unit pivoting the suction cups can be done so that there is a total tightening of the bow 14 in the diagonal direction results.

BEZUGSZEICHENLISTEREFERENCE SIGN LIST

11
WendeeinrichtungTurning device
22nd
BogenrotationsdruckmaschineSheet-fed rotary printing machine
44th
Zylindercylinder
66
SauggreiferSuction cup
55
radiale Richtungradial direction
88th
PeripheriePeriphery
1010th
HinterkanteTrailing edge
1212th
vorgeordneter bogenführender Zylinder, z. B. Druckzylinderupstream bow-guiding cylinder, e.g. B. impression cylinder
1414
Bogenbow
1616
GreifereinrichtungGripper device
1818th
GreiferwelleGripper shaft
2020th
HaltearmHolding arm
2222
SaugkopfSuction head
2424th
GreiferGripper
2626
GreiferauflageGripper pad
2828
Pfeil, der axiale Richtung angibtArrow indicating the axial direction
30a30a
Rolle am SaugkopfRoller on the suction head
30b30b
Rolle am HaltearmRoll on the holding arm
3131
GleitflächeSliding surface
3232
Stüztflächen an GreiferauflageSupport surfaces on the gripper pad
3333
Mittellinie des BogensCenter line of the arch
3434
SpannwegSpan
3636
Seitenrand des BogensEdge of the sheet
3838
Seitenrand des Bogens Edge of the sheet
218218
GreiferwelleGripper shaft
222222
SaugkopfSuction head
230a230a
Rolle/GleitflächenRoller / sliding surfaces
232232
StützflächenSupport surfaces
240240
starrer Haltearmrigid support arm
242242
Drehpunktpivot point
244244
starrer Schwenkarmrigid swivel arm
246246
Federfeather
322322
beweglicher Saugkopfmovable suction head
323323
Gehäusecasing
331331
GleitflächeSliding surface
332332
StützflächeSupport surface
340340
starrer Haltearmrigid support arm
346346
federelastische Elementeresilient elements
350350
federelastische Elementeresilient elements
352352
Radialführung für beweglichen SaugkopfRadial guide for movable suction head
354354
Oberseite des GehäusesTop of the case

Claims (14)

Sauggreifer (6) in einer Wendeeinrichtung (1) einer Bogenrotationsdruckmaschine (2), welcher zur Übernahme der Hinterkante (10) eines auf einem vorgeordneten bogenführenden Zylinder (12) geführten Bogens (14) aus der Peripherie (8) eines nachgeordneten bogenführenden Zylinders (4) herausfährt, den zu wendenden Bogen (14) im Bereich seiner Hinterkante (10) ergreift und in im wesentlichen radialer Richtung in Richtung nachgeordneten bogenführenden Zylinders (4) zurückfährt, wo er die Hinterkante (10) des Bogens (14) an eine weitere Greifereinrichtung (16) übergibt,
dadurch gekennzeichnet,
daß Mittel (30a, 30b, 32; 230, 232, 240, 244, 246) vorgesehen sind, die die im wesentlichen radiale Rückbewegung (5) des Sauggreifers (6) in eine den Bogen (14) straffende Axialbewegung desselben überführen.
Suction gripper (6) in a turning device (1) of a sheet-fed rotary printing press (2), which is used to take over the rear edge (10) of a sheet (14) guided on an upstream sheet-guiding cylinder (12) from the periphery (8) of a downstream sheet-guiding cylinder (4 ) moves out, grips the sheet (14) to be turned in the area of its rear edge (10) and returns in a substantially radial direction in the direction of the downstream sheet-guiding cylinder (4), where it traces the rear edge (10) of the sheet (14) to a further gripper device (16) passes
characterized by
that means (30a, 30b, 32; 230, 232, 240, 244, 246) are provided which convert the essentially radial backward movement (5) of the suction pad (6) into an axial movement of the same which tightens the arc (14).
Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Mittel eine am Sauggreifer (6) drehbar befestigte Rolle (30a, 30b; 230a, 230b) oder eine Gleitfläche (31, 231, 331) umfassen, die mit einer am nachgeordneten bogenführenden Zylinder (4) angeordneten geneigten Stützfläche (32, 232, 332) zusammenwirkt.
Device according to claim 1,
characterized by
that the means comprise a roller (30a, 30b; 230a, 230b) which is rotatably attached to the suction gripper (6) or a sliding surface (31, 231, 331) which has an inclined support surface (32, 232) arranged on the downstream arc-guiding cylinder (4) , 332) cooperates.
Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß die Stützflächen (32, 232, 332) an Greiferauflagen (26) der Greifereinrichtung (16) angeordnet sind.
Device according to claim 2,
characterized by
that the support surfaces (32, 232, 332) are arranged on gripper supports (26) of the gripper device (16).
Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Sauggreifer (6) einen in axialer Richtung (28) federelastischen Haltearm (20) aufweist, welcher einen den zu wendenden Bogen (14) ansaugenden Saugkopf (22) trägt.
Device according to one of the preceding claims,
characterized by
that the suction gripper (6) has a spring-elastic holding arm (20) in the axial direction (28) which carries a suction head (22) which sucks the sheet (14) to be turned.
Vorrichtung nach einem der Ansprüche 2 bis 4
dadurch gekennzeichnet,
daß die Rolle (30b, 230b) oder die Gleitfläche (31, 231) unmittelbar am federelastischen Haltearm (20) des Sauggreifers (6) angeordnet ist.
Device according to one of claims 2 to 4
characterized by
that the roller (30b, 230b) or the sliding surface (31, 231) is arranged directly on the spring-elastic holding arm (20) of the suction pad (6).
Vorrichtung nach Anspruch 4,
dadurch gekennzeichnet,
daß die Rolle (30a) oder die Gleitfläche (31) am Saugkopf (22) des Sauggreifers (6) angeordnet ist.
Device according to claim 4,
characterized by
that the roller (30a) or the sliding surface (31) on the suction head (22) of the suction gripper (6) is arranged.
Vorrichtung nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet,
daß der Sauggreifer (6) einen starren Haltearm (240, 340) aufweist, an welchem ein den zu wendenden Bogen (14) ansaugender Saugkopf (222, 322) beweglich befestigt ist, der durch federelastische Mittel (246, 346) in axialer Richtung (28) mit einer federelastischen Kraft beaufschlagt wird.
Device according to one of claims 1 or 2,
characterized by
that the suction gripper (6) has a rigid holding arm (240, 340), on which a suction head (222, 322) which sucks the sheet (14) to be turned is movably fastened and which can be moved in the axial direction by spring-elastic means (246, 346) ( 28) is subjected to a resilient force.
Vorrichtung nach Anspruch 7,
dadurch gekennzeichnet,
daß die Rolle oder die Gleitfläche (131) unmittelbar am Saugkopf (322) des Sauggreifers (6) angeordnet ist.
Device according to claim 7,
characterized by
that the roller or the sliding surface (131) is arranged directly on the suction head (322) of the suction gripper (6).
Vorrichtung nach Anspruch 7 oder 8,
dadurch gekennzeichnet,
daß weitere federelastische Mittel (350) vorgesehen sind, durch welche der Saugkopf (322) in Richtung der Umfangsoberfläche des vorgeordneten bogenführenden Zylinders (12) mit einer federelastischen Kraft beaufschlagt wird.
Device according to claim 7 or 8,
characterized by
that additional resilient means (350) are provided, by means of which the suction head (322) is acted upon by a resilient force in the direction of the peripheral surface of the upstream arc-guiding cylinder (12).
Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß der Sauggreifer (6) einen starren, durch eine Greiferwelle (218) in im wesentlichen radialer Richtung (5) verschwenkbaren Haltearm (240) aufweist, an welchem ein Saugkopf (222) in im wesentlichen axialer Richtung (28) verschwenkbar angeordnet ist, der über sich am Haltearm (240) abstützende federelastische Mittel (246) in axialer Richtung mit einer Kraft beaufschlagt wird.
Device according to claim 2,
characterized by
that the suction gripper (6) has a rigid holding arm (240) which can be swiveled in a substantially radial direction (5) by a gripper shaft (218) and on which a suction head (222) is arranged which can be swiveled in a substantially axial direction (28) and which a force is applied in the axial direction via spring-elastic means (246) which are supported on the holding arm (240).
Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Weg (34) der axialen Spannbewegung im wesentlichen linear mit der Rückbewegung des Sauggreifers (6) in Richtung der Peripherie (8) des nachgeordneten bogenführenden Zylinders (4) zunimmt.
Device according to one of the preceding claims,
characterized by
that the path (34) of the axial clamping movement increases substantially linearly with the return movement of the suction gripper (6) in the direction of the periphery (8) of the downstream sheet-guiding cylinder (4).
Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Weg der axialen Spannbewegung (34) im wesentlichen nicht-linear mit der Rückbewegung des Sauggreifers (6) in Richtung der Peripherie (8) des nachgeordneten bogenführenden Zylinders (4) zunimmt.
Device according to one of the preceding claims,
characterized by
that the path of the axial clamping movement (34) increases substantially non-linearly with the return movement of the suction gripper (6) in the direction of the periphery (8) of the downstream sheet-guiding cylinder (4).
Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß eine Vielzahl von Sauggreifern (6) vorgesehen ist, die den zu wendenden Bogen (14) in axialer Richtung (28) von der Mitte (23) aus zu den Seitenrändern (36, 38) des Bogens (14) hin spannen.
Device according to one of the preceding claims,
characterized by
that a plurality of suction pads (6) is provided which tension the sheet (14) to be turned in the axial direction (28) from the center (23) towards the side edges (36, 38) of the sheet (14).
Vorrichtung nach Anspruch 13,
dadurch gekennzeichnet,
daß der Weg der axialen Spannbewegung (34) der Sauggreifer (6) von der Mitte (33) des Bogens (14) aus zu den Seitenrändern (36, 38) des Bogens (14) hin zunimmt.
Device according to claim 13,
characterized by
that the path of the axial clamping movement (34) of the suction pads (6) increases from the center (33) of the sheet (14) to the side edges (36, 38) of the sheet (14).
EP99107376A 1998-05-18 1999-04-22 Suction gripper in a sheet turning device of a rotary sheet printing machine Expired - Lifetime EP0958919B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19822306A DE19822306A1 (en) 1998-05-18 1998-05-18 Suction pad in a turning device of a sheet-fed rotary printing press
DE19822306 1998-05-18

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EP0958919A1 true EP0958919A1 (en) 1999-11-24
EP0958919B1 EP0958919B1 (en) 2002-08-28

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Country Status (7)

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US (1) US6098543A (en)
EP (1) EP0958919B1 (en)
JP (1) JPH11342592A (en)
CN (1) CN1135164C (en)
CZ (1) CZ120999A3 (en)
DE (2) DE19822306A1 (en)
RU (1) RU2169082C2 (en)

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US6912952B1 (en) * 1998-05-24 2005-07-05 Hewlett-Packard Indigo B.V. Duplex printing system
DE10143098C5 (en) * 2000-11-30 2018-10-25 Heidelberger Druckmaschinen Ag Device for guiding and transferring a sheet in a printing machine
JP4567257B2 (en) 2000-11-30 2010-10-20 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト Apparatus for guiding and delivering a sheet from a first cylinder to a second cylinder directly adjacent by a holding element for guiding and delivering the sheet in a machine for processing the sheet
DE10253788A1 (en) * 2001-12-10 2003-06-18 Heidelberger Druckmasch Ag Feeding device for feeding suction air or blowing air to sheet-retaining device displaceable to machine element in sheet-processing machine, has first and second hollow tubes
AUPS061402A0 (en) * 2002-02-19 2002-03-14 Tna Australia Pty Limited A device to aid packaging items
DE102007018539B4 (en) * 2006-05-17 2009-12-10 Manroland Ag Method for operating a sheet-fed printing machine
CN101177061B (en) 2006-11-06 2011-01-12 海德堡印刷机械股份公司 Method and apparatus for turning a sheet during its transport through a printing press
CN106240153B (en) * 2015-06-05 2018-12-04 小森公司 The flat member holding meanss of printing machine
DE102019204872A1 (en) * 2018-06-07 2019-12-12 Heidelberger Druckmaschinen Ag Method for operating a turning device of a printing press
CN113895149A (en) * 2021-10-26 2022-01-07 浙江帝浩科技股份有限公司 Turning device of paper feeder of double-sided printing equipment

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EP0649742A1 (en) * 1993-10-22 1995-04-26 Heidelberger Druckmaschinen Aktiengesellschaft Rotary perfecting press for printing sheets with an impression cylinder operable as collecting drum

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DE3829626A1 (en) * 1988-09-01 1990-03-15 Roland Man Druckmasch Sheet-fed rotary printing machine for perfecting
EP0649742A1 (en) * 1993-10-22 1995-04-26 Heidelberger Druckmaschinen Aktiengesellschaft Rotary perfecting press for printing sheets with an impression cylinder operable as collecting drum

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CZ120999A3 (en) 1999-12-15
EP0958919B1 (en) 2002-08-28
CN1135164C (en) 2004-01-21
DE19822306A1 (en) 1999-11-25
JPH11342592A (en) 1999-12-14
US6098543A (en) 2000-08-08
CN1245116A (en) 2000-02-23
DE59902441D1 (en) 2002-10-02
RU2169082C2 (en) 2001-06-20

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