EP0933203B1 - Suction gripper for the transfer of the trailing edge of a sheet in a rotary sheet printing press - Google Patents

Suction gripper for the transfer of the trailing edge of a sheet in a rotary sheet printing press Download PDF

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Publication number
EP0933203B1
EP0933203B1 EP99100583A EP99100583A EP0933203B1 EP 0933203 B1 EP0933203 B1 EP 0933203B1 EP 99100583 A EP99100583 A EP 99100583A EP 99100583 A EP99100583 A EP 99100583A EP 0933203 B1 EP0933203 B1 EP 0933203B1
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EP
European Patent Office
Prior art keywords
sheet
suction
holding arm
suction head
conveying cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99100583A
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German (de)
French (fr)
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EP0933203A1 (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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Filing date
Publication date
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Publication of EP0933203A1 publication Critical patent/EP0933203A1/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 for transferring the rear edge of a Sheet in a turning device of a 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 beautiful and Reverse printing operation from the periphery of an impression cylinder downstream cylinder out to the peripheral surface of the Back pressure cylinder is pivoted where it is the rear edge of the turns and takes this before passing the Gripper centers between the two cylinders in the periphery of the subordinate cylinder leads. Because of the rigid and rigid Design of the suction pad and the fixed swivel path result in the processing of substrates of different thicknesses Varying pressing forces with which the suction head of the suction pad when Sucking the trailing edge of the sheet against the paper or the Circumferential surface of the impression cylinder is pressed.
  • DE-OS 41 06 703 A1 describes a first oscillating shaft pivotable vibrating suction system known, which the rear edge of a sheet to be handed over in the perfecting mode in the area the gripper centers between upstream and downstream engages bow-guiding cylinder.
  • the vibrating suction system on a swing arm is the substrate thickness stored, which by means of an eccentric around a second oscillating shaft is pivotable.
  • the Swing arm with a stop which at maximum to processing sheet thicknesses at an associated stop on Cylinder body of the subordinate sheet-guiding cylinder abuts.
  • a vacuum cleaner is in a turning device Sheet-fed rotary printing machine known, one made of flexible material manufactured suction head that automatically adapts to different strengths Adapting substrate materials. Due to the flexible design of the The suction head arrives when the sheet is tightened before delivery a downstream gripper device for position shifts the same, which is a passable transfer of the sheet trailing edge exclude.
  • Suction head made of flexible material has the disadvantage that its elastic Properties can change significantly over time and that at Processing of very strong sheets, e.g.
  • the one automatic adjustment to different substrate thicknesses enables and also an extremely precise handover of the Ensures trailing edge of sheet to downstream gripper devices.
  • Another object of the present invention is a suction pad to create, which has a comparatively low weight, only one has a comparatively small number of mechanically moving parts and that requires almost no maintenance and adjustment work.
  • a turning device 1 comprises one Sheet-fed rotary printing machine 2 has a reversing drum 4 on which a Suction cup 6 according to the invention is arranged, which comes from the periphery 8 the turning drum 4, preferably in the area in front of the Transfer centers 12 between the impression cylinder 10 of the upstream printing unit and the turning drum 4, for gripping the The rear edge 14 of a sheet 16 to be turned can be pivoted out.
  • the suction gripper 6 according to the invention uses the example of a Turning device 1 is described, which according to the principle of so-called single drum application works, its use is not on one such a turning device is limited and can, for example, also on one Known turning device can be provided with a storage drum.
  • the suction gripper 6 comprises a holding arm 18 which is rotatably connected to a Gripper shaft 20 is connected, by means of which the gripper 6 from the Periphery 8 of the downstream sheet-guiding cylinder, for example the turning drum 4 of Fig. 1 is pivoted out.
  • a leaf spring 22 is preferably at one end near the gripper shaft 20 Holding arm 18 of the suction pad 6 attached.
  • a suction head 24 which preferably consists of a light Material such as light metal or plastic is made and which has a suction air bore 26 in its interior, which has a Connection 28 and a preferably flexible connecting line 30 with Suction air is applied.
  • the suction air is over a bore 32 formed in the gripper shaft 20 is supplied via a wide nozzle 34 with the flexible connecting line 30 in Flow connection is established.
  • the suction channel 26 preferably extends immediately to the suction surface 36 of the suction head 24, which is the latter preferably with a plurality of not shown in the figures groove-shaped depressions is provided which with the suction air bore 26 in Suction head 24 are in flow connection.
  • the adjusting screw 40 is preferably of substrates of minimal thickness so far screwed into the threaded bore 38 of the leaf spring 22 that the free end of the adjusting screw 40 just on the inside of the Holding arms 18 abuts and between the top of the sheet 16a and Suction area 36 there is a small gap.
  • the leaf spring 22 When processing thick sheets 16b, the leaf spring 22 is due the increased distance between the Suction surface 36 and the peripheral surface of the upstream sheet-guiding cylinder 10 against their bias deflected, which is indicated by the greatly enlarged gap 44 in Fig. 3 is. As a result of. preferably large length and the bias of the Leaf spring 22 becomes the suction head 24 when processing thick Sheet 16b with a well-defined contact pressure against the rear edge 14 the sheet pressed, which is so small that damage to the Suction gripper 6 and its drive also over a longer period away with certainty.
  • the holding arm 18 pivots of the suction pad 6 according to the invention before passing the Gripper centers 12 (see FIG. 1) in the periphery 8 of the downstream arc-guiding cylinder 4 back.
  • the free end of the Adjusting screw 40 due to the bias of the leaf spring 22 on the Inside of the holding arm 18, whereby the suction surface 36 of the Suction head 24 and thus the surface of the suction surface 36 sucked printed side of the sheet 16a, 16b when transferring the Trailing edge 14 to a downstream gripper always the same well-defined position that can be adjusted using the adjusting screw 40 regardless of whether thick or thin sheets are processed become.
  • lateral guides 46 are formed on the holding arm 18, between which the leaf spring 22 during the deflection of the suction head 24 is guided laterally.
  • the positioning and location of the printed Sheet side 16a, 16b when the rear edge 14 is transferred Sheet 16a, 16b is shown below with reference to that shown in FIG Embodiment of a suction pad according to the invention in connection with Figures 6a and 6b described again in detail.
  • the suction head 124 is in a guide 146 formed on the holding arm 118 added.
  • a pin element 139 On the side opposite the suction surface 136 of the suction head 124 of the suction head 124 arises from a pin element 139, which is characterized by a opening 141 formed in swivel arm 118 extends through and preferably has a threaded portion 147 on which one or several stop nuts or countered nuts 149 are screwed on.
  • a compression spring 122 is located within the guide 146 of the suction head 124 added, which is preferably arranged around the pin element 139 and which is with one end on the holding arm 118 and with her supports the other end on the suction head 124 and this towards Circumferential surface of the upstream sheet-guiding cylinder 10 crowded.
  • the pin element 139 has in the area of the compression spring 122 preferably a smooth-walled outer surface that provides precise guidance of the Compression spring 122 guaranteed.
  • a compression spring 122 it can continue to be provided appropriate spring elastic means, for. B. several compression springs an elastomer with additional damping Properties or a pneumatic element, such as. B. one Airbag between the suction head 124 and the holding arm 118 of the to arrange suction pad 106 of FIG. 4, which the Apply a resilient force to the suction head.
  • the Compression spring 122 is preferably a spring with a small one Spring constants, which is, however, comparatively strongly biased.
  • the Movement of the suction head 124 out of the guide 146 is by the Nuts 149 and the pin member 139 bound together, one Form stop according to the invention for the suction head 124, its position can be adjusted with respect to the holding arm 118 by means of the nuts 149 can.
  • the suction head has in those shown in Figures 2 to 6 Embodiments of the invention preferably a cylindrical or rectangular form.
  • the Suction head 124 After pivoting back the holding arm 118 in the direction of Periphery 8 of the downstream sheet-guiding cylinder 4 is the Suction head 124 holding bends 16a, 16b by the force of compression spring 122 pushed out of the guide 146, the position of the suction head 124 and thus the position of the rear edge 14 of the sheet 16a, 16b through the Nuts 149 is specified. 6a and 6b, the Position of the suction head 124 using the nuts 149 preferably so set that the surface of the printed side of the sheet 16a, 16b in Area of the rear edge 14 on the in Fig. 6a and 6b as dashed Line shown transfer position 150, which for example through the top of the schematically indicated in Fig. 6 Gripper pad 152 can be specified.
  • the holding arm 218 of the suction gripper 206 carrying the suction head 224 made of an elastic material without a stop or Limitation for the holding arm 218 is provided.
  • the holding arm is preferably by a thin-walled tube 218 made of a flexible material, such as e.g. Steel, Titanium or aluminum or plastic, e.g. Carbon fiber material, manufactured.
  • the first end of the flexible according to the invention Tube 218 in a sleeve 260 connected to the gripper shaft 220 recorded the interior of the tube 218a more advantageous Is designed as a suction air supply line to the suction head 224 and with the suction air supply hole 232 in the gripper shaft 220 in Flow connection is established.
  • the other end of the flexible tube 218 is e.g. by means of screws or a sleeve with the suction head 224 connected, which preferably has the same structure as the suction heads 24 and 124 of the previously described embodiments.
  • the wall diameter of the tube 218 according to the invention is shown in Depends on the material used and the length of the tube in chosen such that the suction head 224 on the one hand such strength has a free and uncontrolled movement of the same especially at high production speeds with certainty is excluded and when swiveling towards the rear edge 14 of the Arch 16 always a predetermined distance of the suction surface 136 of the Suction head to the sheet 16, or to the peripheral surface of the upstream bow-guiding cylinder 10 sets, but also on the other Processing sheets 16b of maximum thickness only comparatively small Forces act on the suction gripper 206 and its drive which are none have harmful effects.
  • the suction gripper 206 has due to its comparatively low weight, for example only 8-15 g and the associated low inertial forces such high rigidity that on the one hand an exact positioning of the Suction head 224 when swinging up to the upstream arc-guiding cylinder is ensured, but on the other hand, the at Processing thick sheets 16b on the suction pad 206 and its Acting forces are considerably smaller than the forces that are over damage the Guide suction pad 224 or its drive.
  • the holding arm 218 can also be designed in such a way that its Stiffness in the running or transport direction of the sheet 16 as well as in The transverse direction of the arc is many times larger than in the swivel direction the same. This ensures that in the event of an additional Elongation of the sheet 16 in the longitudinal direction of the sheet when the Suction cup 206 in the periphery 8 of the downstream sheet-guiding Cylinder 4 no lateral deflection of the holding arm 218 occurs, which to inaccuracies in the transfer of the trailing edge 14 to one downstream gripper device can lead.
  • Suction gripper 306 is the holding arm 318 with the on it attached suction head 324 formed rigid overall and with it actuating gripper shaft 320 rotatably via spring-elastic means 322 coupled.
  • the movement of the rigid support arm 318 in the direction of the Trailing edge 14 of the sheet 16 to be turned is through Stop means 349 limited, preferably one with the Gripper shaft 320 include rotatably connected stop against which the Holding arm 318 is pushed by the resilient means 322.

Landscapes

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

Description

Die Erfindung betrifft einen Sauggreifer zur Übergabe der Hinterkante eines Bogens in einer Wendeeinrichtung einer Bogenrotationsdruckmaschine gemäß dem Oberbegriff von Anspruch 1.The invention relates to a suction pad for transferring the rear edge of a Sheet in a turning device of a 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 führt. Aufgrund der starren und steifen Ausgestaltung des Sauggreifers und des fest vorgegebenen Schwenkweges ergeben sich bei der Verarbeitung unterschiedlich dicker Bedruckstoffe stark variierende Andrückkräfte, mit denen der Saugkopf des Sauggreifers beim Ansaugen der Bogenhinterkante gegen das Papier, bzw. die Umfangsoberfläche des Gegendruckzylinders gedrückt wird. So besteht bei sehr dünnen Papieren, wie beispielsweise Bibelpapieren, die Gefahr, daß der Saugkopf des Sauggreifers die Oberfläche des Bogens überhaupt nicht berührt, wodurch sich größere Schwankungen in der Lage der Hinterkante des Bogens bezüglich des Sauggreifers ergeben können, die zu Passerfehlern bei der Übergabe der Bogenhinterkante an nachfolgende Greifereinrichtungen führen. Bei der Verarbeitung von dicken Bedruckstoffen werden hingegen hohe mechanische Kräfte auf die Hinterkante des Bogens, den Sauggreifer als solchen sowie das den Sauggreifer betätigende Getriebe ausgeübt, wodurch sich am Bogen Druckstellen bilden können und der Sauggreifer, bzw. das Getriebe, einer hohen mechanischen Beanspruchung und damit einem hohen Verschleiß unterliegen.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 beautiful and Reverse printing operation from the periphery of an impression cylinder downstream cylinder out to the peripheral surface of the Back pressure cylinder is pivoted where it is the rear edge of the turns and takes this before passing the Gripper centers between the two cylinders in the periphery of the subordinate cylinder leads. Because of the rigid and rigid Design of the suction pad and the fixed swivel path result in the processing of substrates of different thicknesses Varying pressing forces with which the suction head of the suction pad when Sucking the trailing edge of the sheet against the paper or the Circumferential surface of the impression cylinder is pressed. So there is at very thin papers, such as Bible papers, the risk that the Suction head of the suction cup does not touch the surface of the sheet at all touches, which causes greater fluctuations in the position of the rear edge of the bow with respect to the suction pad can result in register errors when the trailing edge of the sheet is transferred to the following Guide gripper devices. When processing thick In contrast, substrates are subject to high mechanical forces Trailing edge of the sheet, the suction pad as such and the Suction cup actuating gears are exerted, causing themselves to bow Can form pressure points and the suction pad, or the gear, one high mechanical stress and thus high wear subject to.

Aus der DE-OS 41 06 703 A1 ist ein um eine erste Schwingwelle verschwenkbares Schwingsaugersystem bekannt, welches die Hinterkante eines zu übergebenden Bogens im Schön- und Widerdruckbetrieb im Bereich der Greiferzentralen zwischen vorgeordnetem und nachgeordnetem bogenführenden Zylinder ergreift. Zur Anpassung an unterschiedliche Bedruckstoffstärken ist das Schwingsaugersystem auf einer Schwinge gelagert, welche mittels eines Exzenters um eine zweite Schwingwelle verschwenkbar ist. Um den maximalen Verstellweg des Exzenters und damit die maximal zu bedruckende Bedruckstoffstärke zu begrenzen, ist die Schwinge mit einem Anschlag versehen, welcher bei maximal zu verarbeitenden Bogenstärken an einem zugeordneten Anschlag am Zylinderkörper des nachgeordneten bogenführenden Zylinders anliegt. Zwischen der Schwinge und dem Zylinderkörper ist ferner eine Druckfeder angeordnet, die zur Erzeugung einer Gegenkraft beim Verdrehen des Exzenters in Richtung zur maximalen Bedruckstoffstärke hin eine Gegenkraft auf die Schwinge ausübt. Abgesehen davon, daß die beschriebene Vorrichtung mechanisch aufwendig zu fertigen ist und zahlreiche bewegliche Teile enthält,ermöglicht sie auch keine automatische Anpassung an unterschiedliche Bedruckstoffstärken.DE-OS 41 06 703 A1 describes a first oscillating shaft pivotable vibrating suction system known, which the rear edge of a sheet to be handed over in the perfecting mode in the area the gripper centers between upstream and downstream engages bow-guiding cylinder. To adapt to different The vibrating suction system on a swing arm is the substrate thickness stored, which by means of an eccentric around a second oscillating shaft is pivotable. By the maximum adjustment path of the eccentric and thus to limit the maximum printing material thickness to be printed is the Swing arm with a stop, which at maximum to processing sheet thicknesses at an associated stop on Cylinder body of the subordinate sheet-guiding cylinder abuts. There is also a compression spring between the rocker and the cylinder body arranged to generate a counterforce when twisting the Eccentric towards the maximum substrate thickness Exerts drag on the swingarm. Apart from the fact that the described device is mechanically complex to manufacture and contains numerous moving parts, it also does not allow automatic Adaptation to different substrate thicknesses.

Aus der DD-PS 142 953 ist ein Sauger in einer Wendeeinrichtung einer Bogenrotationsdruckmaschine bekannt, der einen aus flexiblem Material gefertigten Saugkopf aufweist, der sich automatisch an verschieden starke Bedruckstoffmaterialien anpaßt. Aufgrund der flexiblen Ausgestaltung des Saugkopfes kommt es bei einem Straffen des Bogens vor der Übergabe an eine nachgeordnete Greifereinrichtung zu Positionsverschiebungen desselben, die eine passerhaltige Übergabe der Bogehinterkante ausschließen. Darüber hinaus besitzt der in der Schrift beschriebene Saugkopf aus flexiblem Material den Nachteil, daß sich dessen elastische Eigenschaften im Laufe der Zeit stark verändern können und daß bei der Verarbeitung von sehr starken Bogen, z.B. mit einer Dicke im Bereich von 1 mm, dennoch sehr hohe Kräfte auf den Sauger als solchen wirken, die dadurch hervorgerufen werden, daß nicht nur die dünnwandige Lippe des Saugers sondern der gesamte Gummikörper desselben zusammengedrückt wird. Dies steht im Widerspruch zu der Forderung, die Gummilippe bei der Verarbeitung von sehr dünnen Bogen möglichst dünnwandig auszubilden, um ein lokales Einsaugen und Reißen des Papiers im Bereich der Saugköpfe auszuschließen. Die beschriebenen flexiblen Saugköpfe stellen somit lediglich einen Kompromiß dar.From DD-PS 142 953 a vacuum cleaner is in a turning device Sheet-fed rotary printing machine known, one made of flexible material manufactured suction head that automatically adapts to different strengths Adapting substrate materials. Due to the flexible design of the The suction head arrives when the sheet is tightened before delivery a downstream gripper device for position shifts the same, which is a passable transfer of the sheet trailing edge exclude. In addition, the one described in the document has Suction head made of flexible material has the disadvantage that its elastic Properties can change significantly over time and that at Processing of very strong sheets, e.g. with a thickness in the range of 1 mm, but very high forces act on the suction cup as such, which are caused by the fact that not only the thin-walled lip of the But the entire rubber body of the same is compressed becomes. This contradicts the requirement that the rubber lip on the To make processing of very thin sheets as thin-walled as possible, for local suction and tearing of the paper in the area of the suction heads to exclude. The flexible suction heads described thus represent is just a compromise.

Durch die Erfindung wird die Aufgabe gelöst, einen Sauggreifer zur Übergabe der Hinterkante eines zu wendenden Bogens in einer Wendeeinrichtung einer Bogenrotationsdruckmaschine zu schaffen, der eine automatische Anpassung an unterschiedlichste Bedruckstoffstärken ermöglicht und der zudem eine äußerst präzise Übergabe der Bogenhinterkante an nachgeordnete Greifereinrichtungen sicherstellt. Weiterhin ist es eine Aufgabe der vorliegenden Erfindung, einen Sauggreifer zu schaffen, der ein vergleichsweise geringes Gewicht besitzt, der nur eine vergleichsweise kleine Anzahl von mechanisch bewegten Teilen aufweist und der nahezu keine Wartungs- und Einstellarbeiten benötigt.The object is achieved by the invention, a suction pad for Transfer of the trailing edge of a sheet to be turned in one To create turning device of a sheet-fed rotary printing press, the one automatic adjustment to different substrate thicknesses enables and also an extremely precise handover of the Ensures trailing edge of sheet to downstream gripper devices. Another object of the present invention is a suction pad to create, which has a comparatively low weight, only one has a comparatively small number of mechanically moving parts and that requires almost no maintenance and adjustment work.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale von Anspruch 1, 8 und 12 gelöst.This object is achieved by the features of claims 1, 8 and 12 solved.

Weitere Merkmale der Erfindung sind in den Unteransprüchen enthalten.Further features of the invention are contained in the subclaims.

Der erfindungsgemäße Sauggreifer wird nachfolgend mit Bezug auf die Zeichnungen anhand bevorzugter Ausführungsformen beschrieben. The suction pad according to the invention is described below with reference to FIG Drawings described using preferred embodiments.

In den Zeichnungen zeigen

Fig. 1
eine schematische Darstellung einer Bogenrotationsdruckmaschine mit einer Wendeeinrichtung und einem an der Wendetrommel der Wendeeinrichtung angeordneten erfindungsgemäßen Sauggreifer,
Fig. 2
eine erste Ausführungsform eines erfindungsgemäßen Sauggreifers beim Ergreifen der Hinterkante eines auf einem vorgeordneten bogenführenden Zylinder geführten dünnen Bogens,
Fig. 3
den Sauggreifer von Fig. 2 beim Ergreifen eines auf einem vorgeordneten bogenführenden Zylinder geführten dicken Bogens,
Fig. 4
eine weitere Ausführungsform eines erfindungsgemäßen Sauggreifers, bei dem der Saugkopf in einer am Haltearm des Sauggreifers gebildeten Führung verschiebbar aufgenommen ist,
Fig. 5a
den Sauggreifer von Fig. 4 beim Ergreifen eines dünnen Bogens
Fig. 5b
den Sauggreifer von Fig. 4 beim Ergreifen eines dicken Bogens ,
Fig. 6a
eine schematische Darstellung der Lage der Hinterkante eines dünnen Bogens sowie der Saugkopfstellung des erfindungsgemäßen Sauggreifers von Fig. 5a nach dem Zurückschwenken in die Bogenübergabeposition,
Fig. 6b
eine schematische Darstellung der Lage der Hinterkante eines dicken Bogens sowie der Saugkopfstellung des erfindungsgemäßen Sauggreifers von Fig. 5b nach dem Zurückschwenken in die Bogenübergabeposition,
Fig. 7
eine schematische Darstellung einer weiteren Ausführungsform eines erfindungsgemäßen Sauggreifers, bei dem der Haltearm flexibel ausgebildet ist und
Fig. 8
eine schematische Darstellung einer weiteren Ausführungsform eines erfindungsgemäßen Sauggreifers, bei dem der Haltearm steif ausgebildet und mit der Greiferwelle drehbeweglich über federelastische Mittel gekoppelt ist.
Show in the drawings
Fig. 1
1 shows a schematic representation of a sheet-fed rotary printing press with a turning device and a suction gripper according to the invention arranged on the turning drum of the turning device,
Fig. 2
a first embodiment of a suction gripper according to the invention when gripping the rear edge of a thin sheet guided on an upstream sheet-guiding cylinder,
Fig. 3
2 when gripping a thick sheet guided on an upstream sheet-guiding cylinder,
Fig. 4
a further embodiment of a suction gripper according to the invention, in which the suction head is slidably received in a guide formed on the holding arm of the suction gripper,
Fig. 5a
the suction pad of Fig. 4 when gripping a thin sheet
Fig. 5b
4 when gripping a thick sheet,
Fig. 6a
5a shows a schematic representation of the position of the rear edge of a thin sheet and the position of the suction head of the suction pad according to the invention from FIG. 5a after pivoting back into the sheet transfer position,
Fig. 6b
5b shows a schematic representation of the position of the rear edge of a thick sheet and the position of the suction head of the suction pad according to the invention from FIG. 5b after pivoting back into the sheet transfer position,
Fig. 7
is a schematic representation of a further embodiment of a suction pad according to the invention, in which the holding arm is flexible and
Fig. 8
is a schematic representation of a further embodiment of a suction gripper according to the invention, in which the holding arm is rigid and is rotatably coupled to the gripper shaft via spring-elastic means.

Wie in Fig. 1 dargestellt, umfaßt eine Wendeeinrichtung 1 einer Bogenrotationsdruckmaschine 2 eine Wendetrommel 4, an welcher ein erfindungsgemäßer Sauggreifer 6 angeordnet ist, der aus der Peripherie 8 der Wendetrommel 4, vorzugsweise im Bereich vor der Übergabezentralen 12 zwischen dem Gegendruckzylinder 10 des vorgeordneten Druckwerks und der Wendetrommel 4, zum Ergreifen der Hinterkante 14 eines zu wendenden Bogens 16 herausschwenkbar ist. Obwohl der erfindungsgemäße Sauggreifer 6 nachfolgend am Beispiel einer Wendeeinrichtung 1 beschrieben ist, welche nach dem Prinzip der sogenannten Eintrommelwendung arbeitet, ist dessen Einsatz nicht auf eine solche Wendeeinrichtung beschränkt und kann beispielsweise auch an einer bekannten Wendeeinrichtung mit einer Speichertrommel vorgesehen sein.As shown in Fig. 1, a turning device 1 comprises one Sheet-fed rotary printing machine 2 has a reversing drum 4 on which a Suction cup 6 according to the invention is arranged, which comes from the periphery 8 the turning drum 4, preferably in the area in front of the Transfer centers 12 between the impression cylinder 10 of the upstream printing unit and the turning drum 4, for gripping the The rear edge 14 of a sheet 16 to be turned can be pivoted out. Although the suction gripper 6 according to the invention uses the example of a Turning device 1 is described, which according to the principle of so-called single drum application works, its use is not on one such a turning device is limited and can, for example, also on one Known turning device can be provided with a storage drum.

Gemäß einer ersten, bevorzugten Ausführungsform eines erfindungsgemäßen Sauggreifers 6, welche in Fig. 2 und 3 dargestellt ist, umfaßt der Sauggreifer 6 einen Haltearm 18, der drehfest mit einer Greiferwelle 20 verbunden ist, mittels welcher der Greifer 6 aus der Peripherie 8 des nachgeordneten bogenführenden Zylinders, beispielsweise der Wendetrommel 4 von Fig. 1, herausgeschwenkt wird. Eine Blattfeder 22 ist mit ihrem einen Ende vorzugsweise nahe der Greiferwelle 20 am Haltearm 18 des Sauggreifers 6 befestigt. Das andere Ende der Blattfeder 22 ist mit einem Saugkopf 24 verbunden, der vorzugsweise aus einem leichten Werkstoff wie beispielsweise Leichtmetall oder Kunststoff gefertigt ist und der in seinem Inneren eine Saugluftbohrung 26 aufweist, die über einen Stutzen 28 und eine vorzugsweise flexible Verbindungsleitung 30 mit Saugluft beaufschlagt wird.According to a first preferred embodiment of a suction gripper 6 according to the invention, which is shown in FIGS. 2 and 3, The suction gripper 6 comprises a holding arm 18 which is rotatably connected to a Gripper shaft 20 is connected, by means of which the gripper 6 from the Periphery 8 of the downstream sheet-guiding cylinder, for example the turning drum 4 of Fig. 1 is pivoted out. A leaf spring 22 is preferably at one end near the gripper shaft 20 Holding arm 18 of the suction pad 6 attached. The other end of the leaf spring 22 is connected to a suction head 24, which preferably consists of a light Material such as light metal or plastic is made and which has a suction air bore 26 in its interior, which has a Connection 28 and a preferably flexible connecting line 30 with Suction air is applied.

Bei der bevorzugten Ausführungsform der Erfindung wird die Saugluft über eine in der Greiferwelle 20 gebildete Bohrung 32 zugeführt, die über einen weiten Stutzen 34 mit der flexiblen Verbindungsleitung 30 in Strömungsverbindung steht. Der Saugkanal 26 erstreckt sich vorzugsweise unmittelbar bis zur Saugfläche 36 des Saugkopfes 24, welch letztere bevorzugter Weise mit einer Vielzahl von in den Figuren nicht dargestellten nutenförmigen Vertiefungen versehen ist, die mit der Saugluftbohrung 26 im Saugkopf 24 in Strömungsverbindung stehen.In the preferred embodiment of the invention, the suction air is over a bore 32 formed in the gripper shaft 20 is supplied via a wide nozzle 34 with the flexible connecting line 30 in Flow connection is established. The suction channel 26 preferably extends immediately to the suction surface 36 of the suction head 24, which is the latter preferably with a plurality of not shown in the figures groove-shaped depressions is provided which with the suction air bore 26 in Suction head 24 are in flow connection.

Wie in den Fig. 2 und 3 dargestellt ist, wird die Bewegung des Saugkopfes 24 in Richtung der Umfangsoberfläche des vorgeordneten bogenführenden Zylinders 10 durch Anschlagmittel in Form einer in eine Gewindebohrung 38 der Blattfeder 22 eingedrehte Verstellschraube 40 begrenzt, die beispielsweise als eine eine Innensechskantbohrung aufweisende Stiftschraube ausgebildet sein kann, welche durch eine Mutter 42 in ihrer Position gesichert wird.As shown in FIGS. 2 and 3, the movement of the suction head 24 towards the peripheral surface of the upstream bowing Cylinder 10 by sling means in the form of a threaded bore 38 the leaf spring 22 screwed adjusting screw 40 limits the for example as a hexagonal bore Stud can be formed, which by a nut 42 in her Position is secured.

Bei der in Fig. 2 und 3 dargestellten Übernahme der Bogenhinterkante 14 schwenkt der Haltearm 18 des erfindungsgemäßen Sauggreifers 6 aus der Peripherie 8 des nachgeordneten bogenführenden Zylinders 4 heraus, bis er die in den Figuren 2 und 3 dargestellte Position erreicht, die unabhängig vom gerade verarbeiteten Bedruckstoff stets gleich ist. Im Falle von Bedruckstoffen minimaler Dicke ist die Verstellschraube 40 vorzugsweise soweit in die Gewindebohrung 38 der Blattfeder 22 eingeschraubt, daß das freie Ende der Verstellschraube 40 gerade an der Innenseite des Haltearmes 18 anliegt und zwischen der Oberseite des Bogens 16a und der Saugfläche 36 ein geringer Spalt besteht.In the takeover of the trailing edge 14 shown in FIGS. 2 and 3 pivots the holding arm 18 of the suction gripper 6 according to the invention from the Periphery 8 of the downstream sheet-guiding cylinder 4 until it reached the position shown in Figures 2 and 3, the independent of the currently processed substrate is always the same. In case of The adjusting screw 40 is preferably of substrates of minimal thickness so far screwed into the threaded bore 38 of the leaf spring 22 that the free end of the adjusting screw 40 just on the inside of the Holding arms 18 abuts and between the top of the sheet 16a and Suction area 36 there is a small gap.

Es ist jedoch ebenfalls denkbar, die Verstellschraube 40 in der Weise einzustellen, daß zwischen dem freien Ende der Verstellschraube 40 und der Innenseite des Haltearmes 18 ein geringer Spalt verbleibt und die Saugfläche 36 des Saugkopfes 24 auch bei der Verarbeitung von Bogen 16 minimaler Dicke unmittelbar an der Oberfläche des Bogens 16a anliegt.However, it is also conceivable to adjust the adjusting screw 40 in this way adjust that between the free end of the adjusting screw 40 and the A small gap remains on the inside of the holding arm 18 and the suction surface 36 of the suction head 24 also minimal when processing sheets 16 Thickness lies directly on the surface of the sheet 16a.

Bei der Verarbeitung von dicken Bogen 16b wird die Blattfeder 22 aufgrund des durch die Bogendicke vergrößerten Abstandes zwischen der Saugfläche 36 und der Umfangsoberfläche des vorgeordneten bogenführenden Zylinders 10 entgegen ihrer Vorspannung weiter ausgelenkt, was durch den stark vergrößerten Spalt 44 in Fig. 3 angedeutet ist. In Folge der. vorzugsweise großen Länge und der Vorspannung der Blattfeder 22 wird der Saugkopf 24 bei der Verarbeitung von dicken Bogen 16b mit einer wohldefinierten Anpreßkraft gegen die Hinterkante 14 der Bogen gepreßt, welche derart gering ist, daß eine Beschädigung des Sauggreifers 6 sowie dessen Antriebs auch über einen längeren Zeitraum hinweg mit Sicherheit vermieden wird.When processing thick sheets 16b, the leaf spring 22 is due the increased distance between the Suction surface 36 and the peripheral surface of the upstream sheet-guiding cylinder 10 against their bias deflected, which is indicated by the greatly enlarged gap 44 in Fig. 3 is. As a result of. preferably large length and the bias of the Leaf spring 22 becomes the suction head 24 when processing thick Sheet 16b with a well-defined contact pressure against the rear edge 14 the sheet pressed, which is so small that damage to the Suction gripper 6 and its drive also over a longer period away with certainty.

Nachdem die Hinterkante 14 der zu verarbeitenden Bogen 16a, 16b von der Saugfläche 36 des Saugkopfes 24 ergriffen wurde, schwenkt der Haltearm 18 des erfindungsgemäßen Sauggreifers 6 vor dem Passieren der Greiferzentralen 12 (vgl. Fig. 1) in die Peripherie 8 des nachgeordneten bogenführenden Zylinders 4 zurück. Hierbei liegt das freie Ende der Verstellschraube 40 in Folge der Vorspannung der Blattfeder 22 an der Innenseite des Haltearmes 18 an, wodurch die Saugfläche 36 des Saugkopfes 24 und damit die Oberfläche der von der Saugfläche 36 angesaugten bedruckten Seite des Bogens 16a, 16b bei der Übergabe der Bogenhinterkante 14 an einen nachgeordneten Greifer stets die gleiche wohdefinierte und über die Verstellschraube 40 einstellbare Position einnehmen, unabhängig davon, ob dicke oder dünne Bogen verarbeitet werden. Weiterhin kann es zur Erhöhung der Übergabegenauigkeit vorgesehen sein, daß am Haltearm 18 seitliche Führungen 46 gebildet sind, zwischen denen die Blattfeder 22 bei der Auslenkung des Saugkopfes 24 seitlich geführt wird. Die Positionierung und Lage der bedruckten Bogenseite 16a, 16b bei der Übergabe der Hinterkante 14 eines Bogens 16a, 16b wird weiter unten anhand der in Fig. 4 gezeigten Ausführungsform eines erfindungsgemäßen Sauggreifers in Zusammenhang mit den Figuren 6a und 6b nochmals im Detail beschrieben.After the trailing edge 14 of the sheets 16a, 16b to be processed by the Suction surface 36 of the suction head 24 has been gripped, the holding arm 18 pivots of the suction pad 6 according to the invention before passing the Gripper centers 12 (see FIG. 1) in the periphery 8 of the downstream arc-guiding cylinder 4 back. Here is the free end of the Adjusting screw 40 due to the bias of the leaf spring 22 on the Inside of the holding arm 18, whereby the suction surface 36 of the Suction head 24 and thus the surface of the suction surface 36 sucked printed side of the sheet 16a, 16b when transferring the Trailing edge 14 to a downstream gripper always the same well-defined position that can be adjusted using the adjusting screw 40 regardless of whether thick or thin sheets are processed become. Furthermore, it can increase the accuracy of the transfer be provided that lateral guides 46 are formed on the holding arm 18, between which the leaf spring 22 during the deflection of the suction head 24 is guided laterally. The positioning and location of the printed Sheet side 16a, 16b when the rear edge 14 is transferred Sheet 16a, 16b is shown below with reference to that shown in FIG Embodiment of a suction pad according to the invention in connection with Figures 6a and 6b described again in detail.

Bei der in Fig. 4 dargestellten Ausführungsform eines erfindungsgemäßen Sauggreifers 106, bei der die der Ausführungsform von Fig. 2 und 3 entsprechende Teile mit einer um 100 erhöhten Bezugszahl bezeichnet sind, wird der Saugkopf 124 in einer am Haltearm 118 gebildeten Führung 146 aufgenommen.In the embodiment shown in Fig. 4 of an inventive Suction pad 106, in which the embodiment of FIGS. 2 and 3 corresponding parts are identified by a reference number increased by 100, the suction head 124 is in a guide 146 formed on the holding arm 118 added.

An der der Saugfläche 136 des Saugkopfes 124 gegenüberliegenden Seite des Saugkopfes 124 entspringt ein Stiftelement 139, welches sich durch eine im Schwenkarm 118 gebildete Öffnung 141 hindurch erstreckt und vorzugsweise einen Gewindeabschnitt 147 aufweist, auf den eine oder mehrere Stoppmuttern oder gekonterte Muttern 149 aufgeschraubt sind. Innerhalb der Führung 146 des Saugkopfes 124 ist eine Druckfeder 122 aufgenommen, die vorzugsweise um das Stiftelement 139 herum angeordnet ist und die sich mit ihrem einen Ende am Haltearm 118 und mit ihrem anderen Ende am Saugkopf 124 abstützt und diesen in Richtung zur Umfangsoberfläche des vorgeordneten bogenführenden Zylinders 10 hindrängt. Das Stiftelement 139 besitzt im Bereich der Druckfeder 122 vorzugsweise eine glattwandige Außenfläche, die eine präzise Führung der Druckfeder 122 gewährleistet. Anstelle einer Druckfeder 122 kann es weiterhin vorgesehen sein, entsprechende federelastische Mittel, z. B. mehrere Druckfedern ein Elastomer mit zusätzlichen dämpfenden Eigenschaften oder aber ein pneumatisches Element, wie z. B. einen Luftsack zwischen dem Saugkopf 124 und dem Haltearm 118 des erfindungsgemäßen Sauggreifers 106 von Fig. 4 anzuordnen, welche den Saugkopf mit einer federelastischen Kraft beaufschlagen. Die Druckfeder 122 ist vorzugsweise eine Feder mit einer kleinen Federkonstanten, die jedoch vergleichsweise stark vorgespannt ist. Die Bewegung des Saugkopfes 124 aus der Führung 146 heraus wird durch die Muttern 149 und das Stiftelement 139 begrenzt, die zusammen einen erfindungsgemäßen Anschlag für den Saugkopf 124 bilden, dessen Position in Bezug auf den Haltearm 118 mit Hilfe der Muttern 149 eingestellt werden kann.On the side opposite the suction surface 136 of the suction head 124 of the suction head 124 arises from a pin element 139, which is characterized by a opening 141 formed in swivel arm 118 extends through and preferably has a threaded portion 147 on which one or several stop nuts or countered nuts 149 are screwed on. A compression spring 122 is located within the guide 146 of the suction head 124 added, which is preferably arranged around the pin element 139 and which is with one end on the holding arm 118 and with her supports the other end on the suction head 124 and this towards Circumferential surface of the upstream sheet-guiding cylinder 10 crowded. The pin element 139 has in the area of the compression spring 122 preferably a smooth-walled outer surface that provides precise guidance of the Compression spring 122 guaranteed. Instead of a compression spring 122, it can continue to be provided appropriate spring elastic means, for. B. several compression springs an elastomer with additional damping Properties or a pneumatic element, such as. B. one Airbag between the suction head 124 and the holding arm 118 of the to arrange suction pad 106 of FIG. 4, which the Apply a resilient force to the suction head. The Compression spring 122 is preferably a spring with a small one Spring constants, which is, however, comparatively strongly biased. The Movement of the suction head 124 out of the guide 146 is by the Nuts 149 and the pin member 139 bound together, one Form stop according to the invention for the suction head 124, its position can be adjusted with respect to the holding arm 118 by means of the nuts 149 can.

Der Saugkopf besitzt bei den in den Figuren 2 bis 6 gezeigten Ausführungsformen der Erfindung vorzugsweise eine zylindrische oder rechteckige Form.The suction head has in those shown in Figures 2 to 6 Embodiments of the invention preferably a cylindrical or rectangular form.

Die Funktionsweise des erfindungsgemäßen Sauggreifers von Fig. 4 wird nachfolgend mit Bezug auf die Fig. 5a, 5b und 6a, 6b beschrieben.4 will work described below with reference to FIGS. 5a, 5b and 6a, 6b.

Nach dem Herausschwenken des Haltearmes 118 aus der Peripherie 8 des nachgeordneten bogenführenden Zylinders 4 wird die Saugfläche 136 des Saugkopfes 124 gegen die Hinterkante 14 des Bogens 16a, 16b gepreßt, wobei der Haltearm 118 des Sauggreifers 106 stets die gleiche Position einnimmt und demzufolge der Saugkopf 124 in Abhängigkeit von der Dicke des verarbeitenden Bogenmaterials nicht, bzw. mehr oder weniger weit in die Führungen 146 hineinbewegt wird. Hierdurch ist sichergestellt, daß die Saugfläche 136 des Saugkopfes 124 bei der Verarbeitung von dicken bis sehr dicken Bogen 16b nicht mit einer übermäßig hohen Kraft am Bogen 16b anliegt, wodurch der Saugreifer 6, 106, bzw. der Antrieb desselben nur geringfügigen Belastungen ausgesetzt sind.After pivoting the holding arm 118 out of the periphery 8 of the downstream arc-guiding cylinder 4, the suction surface 136 of the Suction head 124 pressed against the rear edge 14 of the sheet 16a, 16b, the holding arm 118 of the suction pad 106 always in the same position occupies and consequently the suction head 124 depending on the thickness of the processing sheet material is not, or more or less far in the guides 146 is moved into it. This ensures that the Suction surface 136 of the suction head 124 when processing thick to very thick thick sheet 16b not with excessive force on sheet 16b is applied, whereby the suction ripers 6, 106, or the drive of the same only are exposed to minor loads.

Nach dem Zurückschwenken des Haltearmes 118 in Richtung der Peripherie 8 des nachgeordneten bogenführenden Zylinders 4 wird der den Bogen 16a, 16b haltende Saugkopf 124 durch die Kraft der Druckfeder 122 aus der Führung 146 herausgedrängt, wobei die Lage des Saugkopfes 124 und damit die Lage der Hinterkante 14 des Bogens 16a, 16b durch die Muttern 149 vorgegeben ist. Wie sich aus Fig. 6a und 6b ergibt, wird die Lage des Saugkopfes 124 mit Hilfe der Muttern 149 vorzugsweise so eingestellt, daß die Oberfläche der bedruckten Seite des Bogens 16a, 16b im Bereich von dessen Hinterkante 14 auf der in Fig. 6a und 6b als gestrichelte Linie dargestellten Übergabeposition 150 verläuft, welche beispielsweise durch die Oberseite der in Fig. 6 schematisch angedeuteten Greiferauflage 152 vorgegeben sein kann.After pivoting back the holding arm 118 in the direction of Periphery 8 of the downstream sheet-guiding cylinder 4 is the Suction head 124 holding bends 16a, 16b by the force of compression spring 122 pushed out of the guide 146, the position of the suction head 124 and thus the position of the rear edge 14 of the sheet 16a, 16b through the Nuts 149 is specified. 6a and 6b, the Position of the suction head 124 using the nuts 149 preferably so set that the surface of the printed side of the sheet 16a, 16b in Area of the rear edge 14 on the in Fig. 6a and 6b as dashed Line shown transfer position 150, which for example through the top of the schematically indicated in Fig. 6 Gripper pad 152 can be specified.

Gemäß einer weiteren, in Fig. 7 gezeigten Ausführungsform der Erfindung ist der den Saugkopf 224 tragende Haltearm 218 des Sauggreifers 206 aus einem elastischem Material gefertigt, ohne daß ein Anschlag oder eine Begrenzung für den Haltearm 218 vorgesehen ist. Bei dieser Ausführungsform der Erfindung wird der Haltearm vorzugsweise durch ein dünnwandiges Röhrchen 218 aus einem flexiblen Material, wie z.B. Stahl, Titan oder Aluminium oder aber Kunststoff, z.B. Kohlefaserwerkstoff, gefertigt.According to a further embodiment of the invention shown in FIG. 7 is the holding arm 218 of the suction gripper 206 carrying the suction head 224 made of an elastic material without a stop or Limitation for the holding arm 218 is provided. At this Embodiment of the invention, the holding arm is preferably by a thin-walled tube 218 made of a flexible material, such as e.g. Steel, Titanium or aluminum or plastic, e.g. Carbon fiber material, manufactured.

Wie in Fig. 7 dargestellt, ist das erste Ende des erfindungsgemäßen flexiblen Röhrchens 218 in einer mit der Greiferwelle 220 verbundenen Muffe 260 aufgenommen, wobei der Innenraum des Röhrchens 218a vorteilhafter Weise als Saugluftzufuhrleitung zum Saugkopf 224 ausgebildet ist und mit der Saugluftzufuhrbohrung 232 in der Greiferwelle 220 in Strömungsverbindung steht. Das andere Ende des flexiblen Röhrchens 218 ist z.B. mittels Schrauben oder einer Muffe mit dem Saugkopf 224 verbunden, der vorzugsweise den gleichen Aufbau wie die Saugköpfe 24 und 124 der zuvor beschriebenen Ausführungsformen besitzt.As shown in Fig. 7, the first end of the flexible according to the invention Tube 218 in a sleeve 260 connected to the gripper shaft 220 recorded, the interior of the tube 218a more advantageous Is designed as a suction air supply line to the suction head 224 and with the suction air supply hole 232 in the gripper shaft 220 in Flow connection is established. The other end of the flexible tube 218 is e.g. by means of screws or a sleeve with the suction head 224 connected, which preferably has the same structure as the suction heads 24 and 124 of the previously described embodiments.

Der Wanddurchmesser des erfindungsgemäßen Röhrchens 218 wird in Abhängigkeit vom verwendeten Material sowie der Länge des Röhrchens in der Weise gewählt, daß der Saugkopf 224 zum einen eine solche Festigkeit aufweist, daß eine freie und unkontrollierte Bewegung desselben insbesondere bei hohen Fortdruckgeschwindigkeiten mit Sicherheit ausgeschlossen ist und sich beim Heranschwenken an die Hinterkante 14 des Bogens 16 stets ein vorgegebener Abstand der Saugfläche 136 des Saugkopfes zum Bogen 16, bzw. zur Umfangsoberfläche des vorgeordneten bogenführenden Zylinders 10 einstellt, zum anderen jedoch auch bei der Verarbeitung von Bogen 16b maximaler Dicke nur vergleichsweise geringe Kräfte auf den Sauggreifer 206 sowie dessen Antrieb wirken, die keine schädigenden Auswirkungen haben.The wall diameter of the tube 218 according to the invention is shown in Depends on the material used and the length of the tube in chosen such that the suction head 224 on the one hand such strength has a free and uncontrolled movement of the same especially at high production speeds with certainty is excluded and when swiveling towards the rear edge 14 of the Arch 16 always a predetermined distance of the suction surface 136 of the Suction head to the sheet 16, or to the peripheral surface of the upstream bow-guiding cylinder 10 sets, but also on the other Processing sheets 16b of maximum thickness only comparatively small Forces act on the suction gripper 206 and its drive which are none have harmful effects.

Wie sich gezeigt hat, besitzt der erfindungsgemäße Sauggreifer 206 aufgrund seines vergleichsweise geringen Gewichts von beispielsweise lediglich 8-15 g und der damit verbundenen geringen Trägheitskräfte eine derart hohe Steifigkeit, daß einerseits eine genaue Positionierung des Saugkopfes 224 beim Heranschwenken an den vorgeordneten bogenführenden Zylinder sichergestellt ist, andererseits jedoch die bei der Verarbeitung von dicken Bogen 16b auf den Sauggreifer 206 sowie dessen Antrieb wirkenden Kräfte erheblich kleiner als die Kräfte sind, die über einen längeren Zeitraum hinweg zu einer Beschädigung des Sauggreifers 224 oder dessen Antriebs führen. As has been shown, the suction gripper 206 according to the invention has due to its comparatively low weight, for example only 8-15 g and the associated low inertial forces such high rigidity that on the one hand an exact positioning of the Suction head 224 when swinging up to the upstream arc-guiding cylinder is ensured, but on the other hand, the at Processing thick sheets 16b on the suction pad 206 and its Acting forces are considerably smaller than the forces that are over damage the Guide suction pad 224 or its drive.

Der Haltearm 218 kann weiterhin in der Weise ausgebildet sein, daß seine Steifigkeit in der Lauf- oder Transportrichtung des Bogens 16 sowie auch in Bogenquerrichtung um ein Vielfaches größer ist als in der Schwenkrichtung desselben. Hierdurch ist sichergestellt, daß im Falle einer zusätzlichen Streckung des Bogens 16 in Bogenlängsrichtung beim Zurückschwenken des Sauggreifers 206 in die Peripherie 8 des nachgeordneten bogenführenden Zylinders 4 kein seitliches Ausweichen des Haltearmes 218 auftritt, welches zu Ungenauigkeiten bei der Übergabe der Hinterkante 14 an eine nachgeordnete Greifereinrichtung führen kann.The holding arm 218 can also be designed in such a way that its Stiffness in the running or transport direction of the sheet 16 as well as in The transverse direction of the arc is many times larger than in the swivel direction the same. This ensures that in the event of an additional Elongation of the sheet 16 in the longitudinal direction of the sheet when the Suction cup 206 in the periphery 8 of the downstream sheet-guiding Cylinder 4 no lateral deflection of the holding arm 218 occurs, which to inaccuracies in the transfer of the trailing edge 14 to one downstream gripper device can lead.

Gemäß einer weiteren, in Fig. 8 gezeigten Ausführungsform eines erfindungsgemäßen Sauggreifers 306 ist der Haltearm 318 mit dem daran befestigten Saugkopf 324 insgesamt steif ausgebildet und mit der ihn betätigenden Greiferwelle 320 drehbeweglich über federelastische Mittel 322 gekoppelt. Die Bewegung des steifen Haltearmes 318 in Richtung der Hinterkante 14 des zu wendenden Bogens 16 wird durch Anschlagsmittel 349 begrenzt, die vorzugsweise einen mit der Greiferwelle 320 drehfest verbundenen Anschlag umfassen, gegen den der Haltearm 318 durch die federelastischen Mittel 322, gedrängt wird. According to a further embodiment of a, shown in FIG Suction gripper 306 according to the invention is the holding arm 318 with the on it attached suction head 324 formed rigid overall and with it actuating gripper shaft 320 rotatably via spring-elastic means 322 coupled. The movement of the rigid support arm 318 in the direction of the Trailing edge 14 of the sheet 16 to be turned is through Stop means 349 limited, preferably one with the Gripper shaft 320 include rotatably connected stop against which the Holding arm 318 is pushed by the resilient means 322.

TEILELISTEPARTS LIST

11
WendeeinrichtungTurning device
22nd
BogenrotationsdruckmaschineSheet-fed rotary printing machine
44th
WendetrommelTurning drum
66
SauggreiferSuction cup
88th
Peripherie der WendetrommelPeriphery of the turning drum
1010th
GegendruckzylinderImpression cylinder
1212th
ZentraleHeadquarters
1414
BogenhinterkanteTrailing edge
1616
Bogenarc
16a16a
dünner Bogenthin bow
16b16b
dicker Bogenthick bow
1818th
HaltearmHolding arm
2020th
GreiferwelleGripper shaft
2222
BlattfederLeaf spring
2424th
SaugkopfSuction head
2626
SaugluftbohrungSuction air hole
2828
StutzenSupport
3030th
flexible Verbindungsleitungflexible connecting line
3232
Bohrungdrilling
3434
weiterer Stutzenfurther neck
3636
SaugflächenSuction surfaces
3838
GewindebohrungTapped hole
4040
VerstellschraubeAdjustment screw
4242
Muttermother
4444
Spalt gap
106106
AusführungsformEmbodiment
118118
HaltearmHolding arm
122122
DruckfederCompression spring
124124
SaugkopfSuction head
136136
SaugflächeSuction surface
139139
StiftelementPin element
141141
Öffnungopening
146146
Führungguide
147147
GewindeabschnittThread section
149149
MutternNuts
150150
ÜbergabepositionTransfer position
152152
GreiferauflageGripper pad
206206
Sauggreifer von Fig. 7Suction pad of Fig. 7
218218
flexibles Röhrchenflexible tube
218a218a
Innenraum des RöhrchensInterior of the tube
224224
SaugkopfSuction head
220220
GreiferwelleGripper shaft
232232
SaugluftzufuhrbohrungSuction air supply hole
236236
SaugflächeSuction surface
260260
Muffesleeve
306306
SauggreiferSuction cup
318318
steifer Haltearmstiff arm
324324
SaugkopfSuction head
320320
GreiferwelleGripper shaft
322322
Federfeather
349349
Anschlagattack

Claims (17)

  1. A suction gripper (6, 106) for transferring the trailing edge (14) of a sheet (16, 16a, 16b) guided on an upstream sheet-conveying cylinder (10) to a downstream sheet-conveying cylinder (4) in a turning device (1) of a sheet-fed rotary printing machine (2),
    characterized by
    a holding arm (18, 118), which is movable out of the circumferential surface (8) of the downstream sheet-conveying cylinder (4) and a suction head (24, 124), which is movably connected to the holding arm (18, 118) via spring-elastic means (22, 122).
  2. The device according to claim 1,
    characterized in that the movement of the suction head in the direction of the circumferential surface of the upstream sheet-conveying cylinder (10) is limited by stop means (38, 40, 42, 139, 141, 147, 149).
  3. The device according to claim 1 or 2,
    characterized in that the spring-elastic means are formed by a leaf spring (22), one end of which is connected to the holding arm (18) and the other end of which is connected to the suction head (24).
  4. The device according to claims 2 and 3,
    characterized in that the stop means comprise an adjusting screw (40), which is screwable into a threaded hole (38) formed in the leaf spring (22), close to the suction head (24), and which is supported on the holding arm (18).
  5. The device according to claim 1 or 2,
    characterized in that the suction head (124) is accommodated in a guide (146), which is formed on the holding arm (118) and permits movement of the suction head (124) in a direction running essentially perpendicular to the holding arm (118).
  6. The device according to claim 5,
    characterized in that the spring-elastic means comprise at least one compression spring (122) which is accommodated in the guide (146) and one end of which is supported on the holding arm (118) and the other end of which is supported on the suction head (124).
  7. The device according to claims 2 and 5,
    characterized in that the stop means comprise a pin element (139), which extends out of the suction head (124) and has a threaded section (147) which extends through an opening (141) formed in the holding arm (118) and onto which a nut element (149) is screwed.
  8. A suction gripper (206) for transferring the trailing edge (14) of a sheet (16, 16a, 16b) guided on an upstream sheet-conveying cylinder (10) to a downstream sheet-conveying cylinder (4) in a turning device (1) of a sheet-fed rotary printing machine (2),
    characterized by
    a flexible holding arm (218), which is movable out of the circumferential surface (8) of the downstream sheet-conveying cylinder (4) and one end of which is connected to a gripper shaft (220) and the other end of which is connected to a suction head (224) that picks up the trailing edge (14) of the sheet (16) by suction.
  9. The device according to claim 8,
    characterized in that the holding arm (218) has a greater stiffness in the sheet running direction than in the direction towards the circumferential surface of the upstream sheet-conveying cylinder (10).
  10. The device according to claim 8 or 9,
    characterized in that the holding arm (218) has a greater stiffness in the sheet transverse direction than in the direction towards the circumferential surface of the upstream sheet-conveying cylinder (10).
  11. The device according to any of claims 8 to 10,
    characterized in that the holding arm comprises a flexible tube (218).
  12. A suction gripper (306) for transferring the trailing edge (14) of a sheet (16, 16a, 16b) guided on an upstream sheet-conveying cylinder (10) to a downstream sheet-conveying cylinder (4) in a turning device (1) of a sheet-fed rotary printing machine (2),
    characterized by
    a stiff holding arm (318), which is movable out of the circumferential surface (8) of the downstream sheet-conveying cylinder (4), one end of which is rotationally movably connected to an associated gripper shaft (320) via spring-elastic means (322) and the other end of which carries the suction head (324) that picks up the trailing edge (14) of the sheet (16) by suction, the movement of the holding arm (318) in the direction towards the circumferential surface of the upstream sheet-conveying cylinder being limited by stop means (349).
  13. The device according to claim 12,
    characterized in that the stop means are formed on the gripper shaft (320).
  14. The device according to any of claims 2 to 13,
    characterized in that the stop means (38, 40, 42, 139, 141, 147, 149, 349) are adjustable.
  15. The device according to one of the preceding claims,
    characterized in that a central suction-air channel is formed in the suction head (24, 124, 224, 324), said suction-air channel being connectable to the suction-air source.
  16. The device according to claim 15,
    characterized in that the suction surface (36, 136) of the suction head (24, 124, 224, 324) which picks up the sheets (16, 16a, 16b) by suction has a plurality of groove-like depressions, which have a flow connection to the suction-air channel (26, 126).
  17. The suction gripper according to any of the preceding claims,
    characterized in that the suction head (24, 124, 224, 324) has an essentially cylindrical or rectangular shape.
EP99100583A 1998-02-03 1999-01-14 Suction gripper for the transfer of the trailing edge of a sheet in a rotary sheet printing press Expired - Lifetime EP0933203B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19804039A DE19804039A1 (en) 1998-02-03 1998-02-03 Suction gripper for transferring the rear edge of a sheet in a turning device of a sheet-fed rotary printing machine
DE19804039 1998-02-03

Publications (2)

Publication Number Publication Date
EP0933203A1 EP0933203A1 (en) 1999-08-04
EP0933203B1 true EP0933203B1 (en) 2001-11-07

Family

ID=7856408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99100583A Expired - Lifetime EP0933203B1 (en) 1998-02-03 1999-01-14 Suction gripper for the transfer of the trailing edge of a sheet in a rotary sheet printing press

Country Status (6)

Country Link
US (1) US6254089B1 (en)
EP (1) EP0933203B1 (en)
JP (1) JPH11268239A (en)
CN (1) CN1116172C (en)
CZ (1) CZ380198A3 (en)
DE (2) DE19804039A1 (en)

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* Cited by examiner, † Cited by third party
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DE19949412A1 (en) * 1999-10-13 2001-04-19 Heidelberger Druckmasch Ag Device for turning sheets in a sheet-fed rotary printing machine
DE10060557B4 (en) * 2000-12-06 2007-05-31 Man Roland Druckmaschinen Ag Sheet guiding device in a rotary printing machine
DE10239398A1 (en) 2001-09-25 2003-04-10 Heidelberger Druckmasch Ag Sheet pick-up device for rotary printing press, has sucker with sucker carrier having sucker heads, and suction air duct extending in interior portion of tubular structure of sucker carrier
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
EP1428778A1 (en) * 2002-12-10 2004-06-16 Fuji Photo Film Co., Ltd. Printing plate sucker
US20040193208A1 (en) * 2003-03-27 2004-09-30 Scimed Life Systems, Inc. Radiopaque embolic protection filter membrane
DE102009000435B4 (en) * 2009-01-27 2021-01-28 Koenig & Bauer Ag Sheet holding system in turning drums of printing machines
DE102010052396A1 (en) * 2010-11-24 2012-05-24 Kuka Roboter Gmbh Method and device for controlling a peripheral component of a robot system
CN105752732A (en) * 2014-12-18 2016-07-13 驰马拉链(安徽)有限公司 Tension adjusting device
CN109490172B (en) * 2018-12-21 2021-03-30 遵义师范学院 Detection apparatus for building waterproof material
CN117125404B (en) * 2023-10-24 2024-01-30 四川托璞勒科技股份有限公司 Negative pressure device and conveying mechanism

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DE2046618A1 (en) * 1970-09-22 1972-03-23 Winkler Duennebier Kg Masch Adjustable suction cups for paper converting machines
DD142861B1 (en) * 1979-04-02 1984-02-22 Planeta Druckmaschinenwerk Ag DEVICE FOR CONTROLLING SUCTION SYSTEMS IN ARC CYLINDERS
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GB2186552B (en) * 1986-02-17 1989-11-08 Shinohara Machinery Co Ltd Reversing gripper of one side and perfecting printing press
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DE3644484A1 (en) * 1986-12-24 1988-07-07 Heidelberger Druckmasch Ag GRIPPER DEVICE FOR A PRINTING MACHINE
DE3829626A1 (en) * 1988-09-01 1990-03-15 Roland Man Druckmasch Sheet-fed rotary printing machine for perfecting
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Also Published As

Publication number Publication date
CN1225313A (en) 1999-08-11
DE19804039A1 (en) 1999-08-05
JPH11268239A (en) 1999-10-05
DE59900387D1 (en) 2001-12-13
EP0933203A1 (en) 1999-08-04
CZ380198A3 (en) 1999-11-17
CN1116172C (en) 2003-07-30
US6254089B1 (en) 2001-07-03

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