EP0402615A2 - Sheet gripper for sheet working machines - Google Patents

Sheet gripper for sheet working machines Download PDF

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Publication number
EP0402615A2
EP0402615A2 EP90108551A EP90108551A EP0402615A2 EP 0402615 A2 EP0402615 A2 EP 0402615A2 EP 90108551 A EP90108551 A EP 90108551A EP 90108551 A EP90108551 A EP 90108551A EP 0402615 A2 EP0402615 A2 EP 0402615A2
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EP
European Patent Office
Prior art keywords
gripper
finger
sheet
shaft
gripper finger
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
EP90108551A
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German (de)
French (fr)
Other versions
EP0402615A3 (en
EP0402615B1 (en
Inventor
Rudolf Melzer
Norbert Korthals
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Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT90108551T priority Critical patent/ATE104212T1/en
Publication of EP0402615A2 publication Critical patent/EP0402615A2/en
Publication of EP0402615A3 publication Critical patent/EP0402615A3/en
Application granted granted Critical
Publication of EP0402615B1 publication Critical patent/EP0402615B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B41F21/104Gripper details

Definitions

  • the invention relates to a sheet gripper for sheet-processing machines according to the preamble of the first claim
  • Such a sheet gripper is known from DE-PS 3 623 405.
  • the disadvantage is that the circular movement of the sheet gripper with partial sinking of the gripper tip into the elastically deforming sheet material and possibly into the material of the gripper pad can result in a shift of the sheet between the gripper pad and sheet gripper. The precise transfer of the sheet between the sheet grippers of two cylinders is thus impaired.
  • a driver pin which is provided with plenty of play in the guides, bores or the like of the clamping piece and which is pinned to the lower end of the gripper finger, abruptly strikes when the upper support roller enters the straight guide, so that the closing process is initiated improperly.
  • a vertically closing gripping device with a controlled gripper shaft is known from DE-PS 2 030 040.
  • the disadvantage is non-positive control of the gripper shaft relative to the pivot point of a control lever by means of a guide on a control cam.
  • the considerable control effort leads to an increase in the inertial forces of a system vibrating with a large radius of inertia and thus to a reduction in the performance of the printing press.
  • a clamp gripper is known, the gripper fingers of which are moved in a substantially perpendicular manner to the cylinder surface when closed.
  • a disadvantage of this gripper is that the vertically guided gripper fingers between the cylinder wall and a guide bar are only loose, i.e. are not performed without play. At high machine speeds, only a few milliseconds are available for opening the grippers, and there are sudden loads that lead to vibration of the machine and unclean pressure. Vibrations of the gripper shaft have an effect on this gripper both perpendicular to the direction of sheet travel and horizontally, so that it is not possible to transfer the sheet in the correct position.
  • a resilient clamping gripper is known from DE-PS 3 529 639, which performs a vertical closing movement in a second movement phase, regardless of the presence of a soft gripper pad.
  • the disadvantage is that two springs must be precisely matched to each other in the spring force in order to avoid jerky movements during the opening and closing movement of the gripper.
  • the object of the invention is to develop the arch gripper specified at the outset in such a way that no sliding movement is carried out during the closing process, i.e. the position of the arch when the gripper is closed cannot be changed by the gripper itself.
  • the main advantage of the bow gripper according to the invention is that the lower end of the gripper finger is positively guided via a groove curve 23 and the gripper tip 6 can be brought into support practically in a linear movement perpendicular to the gripper support 13 or radially to the cylinder 1 before the placement process on the sheet.
  • a precise and play-free adjustment of the gripper finger 5 takes place in the manner of the catch fork effect immediately before the bow gripper is put on.
  • the entire sequence of movements thus takes place without being deflected by a stop. Therefore, no vibrations can occur on the gripper and the gripper control even at high speeds.
  • the spring force is almost fully brought into effect with only minor losses.
  • the vertical guidance of the lower end of the gripper finger 5 in the last phase of movement also prevents the deflection of the gripper shaft 3 and its circular movement from acting as a gripper displacement in the gripper tip 6. If the groove curve 25 is opened at the lower end of the gripper finger 5, the gripper finger 5 can be easily dismantled without having to dismantle the gripper shaft 3. Furthermore, the gripper is finely adjustable in the gripper bite (gripper holding force) and is therefore equipped with a precisely predetermined holding force for overpressing with different material thicknesses.
  • the spring force of the compression spring 9 has the effect that when the gripper finger 5 is closed and opened, the centering on the hinge pin 11 and on the rod 21, which is parallel to the gripper shaft 3, is not released.
  • the axial position of the gripper finger 5 remains in every phase of movement, i.e. also in the vertical movement phase precisely by guiding the side walls 15 of the box part 26 of the gripper finger 5 on the driver arm 7 fastened to the gripper shaft 3.
  • a gripper shaft 3 is pivotally mounted in the cylinder 1 with a fixed axis. The movement is controlled in a known manner via a roller lever, not shown, the roller of which cooperates with a cam disc, also not shown.
  • the gripper shaft 3 is in the Cylinder pit 2 stored in several bearing blocks 4.
  • the hook-shaped gripper finger 5 of the sheet gripper is formed in a central region between the gripper tip 6 and the lower end of the gripper finger 5 as a box part 26 open to the outside, between the side walls 15 of which a driver arm 7 of a driver lever, which is firmly connected to the gripper shaft 3 and is provided individually for each gripper finger 5 12 is included in part.
  • the driver lever 12 is clamped on the gripper shaft 3 by means of a screw 8.
  • a drive pin 11 is rotatably mounted in the box part 26 of the gripper finger 5 and is received in a groove curve 19 of the drive arm 7 of the drive lever 12, which is assigned to the gripper shaft pivot point 17 in radius r.
  • the inside of the side walls 15 of the gripper finger 5 serve on the driver arm 7 of the driver lever 12 as contact surfaces for fixing the axial position of the gripper finger 5.
  • the gripper finger 5 is non-positively connected to the driver lever 12 via a compression spring 9 and adjustable via an adjusting screw 10 which is inserted into a threaded bore the driver arm 7 is screwed.
  • the driving pin 11 lies in the groove curve 19 of the driving arm 7 on the adjusting screw 10 screwed into a threaded bore under the force of the compression springs 9.
  • the compression spring 9 is supported with one end on the driving pin 11 and with the other end - guided in the groove curve 19 - On a screw 14 of the driving arm 7.
  • the screw 14 on the compression spring 9 allows the gripper closing force to be adjusted.
  • the circular movement initiated by the gripper shaft 3 is superimposed by an additional movement with a straight guide component, which is generated by a further groove curve 23 at the lower end of the gripper finger 5.
  • the gripper finger 5 is guided in a precisely fitting manner through a rod 21, the axis 20 of which is arranged in a stationary manner in the cylinder 1 parallel to the gripper shaft pivot point 17 of the gripper shaft 3.
  • the groove curve 23 has a straight line in the radial direction of the cylinder 1 straight curve part 25 in the manner of a catch fork, so that when the gripper pad 13 is opened, the gripper fingers 5 are initially guided in the radial direction, ie perpendicular to the gripper pad 13.
  • This straight part 25 is followed by an arcuate part 24, so that the gripper finger 5 is then guided in an arc in one direction with a tangential component.
  • this process takes place in reverse order.
  • the individual phases of this movement sequence are illustrated in FIG. 3, the phases being identified by reference marks at the top right of the reference symbols.
  • a flat trajectory of the gripper finger 5 can also be generated, depending on the curve shape selected to quickly swivel the gripper tip 6 out of the sheet path when opening, the vertical lifting having been carried out beforehand over a short distance of approximately 2 mm.
  • the gripper finger 5 can be easily dismantled individually, the groove curve 23 on the arcuate part 24 must be passed through the edge of the gripper finger 5 so that a slot is created at the bottom. After loosening the driver pin 11, the gripper finger 5 can then be threaded out of its operating position.
  • the gripper pad 13 can be attached to the cylinder 1 by means of screw 16.
  • a recess 27 is also provided in the cylinder 1 in order to enable the gripper finger 5 to move freely.
  • the closing direction perpendicular to the gripper pad 13 is identified by 22 in FIG. 3.

Landscapes

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

Abstract

The invention relates to a sheet gripper, whose gripper finger, executing a flat gripper flight path and closing perpendicular to the gripper rest, is assigned resiliently and adjustably to the pivot point of the gripper shaft and to the pivot point of a carrier pin, mounted rotatably in a case part of the basic body of the gripper finger and arranged parallel to the gripper shaft, at an angle of approximately 90 DEG , the lower end of the gripper finger being guided in a groove cam by a bar or the like in the manner of a cylinder catch. <IMAGE>

Description

Die Erfindung betrifft einen Bogengreifer für bogenverarbeitende Maschi­nen nach dem Oberbegriff des ersten PatentanspruchesThe invention relates to a sheet gripper for sheet-processing machines according to the preamble of the first claim

Ein derartiger Bogengreifer ist aus der DE-PS 3 623 405 bekannt. Von Nachteil ist, daß durch die kreisförmige Bewegung des Bogengreifers mit teilweisem Einsinken der Greiferspitze in das sich elastisch verformende Bogenmaterial und gegebenenfalls in das Material der Greiferauflage sich eine Verschiebung des Bogens zwischen Greiferauflage und Bogengreifer ergeben kann. Die lagegenaue Übergabe des Bogens zwischen den Bogen­greifern zweier Zylinder ist somit beeinträchtigt.Such a sheet gripper is known from DE-PS 3 623 405. The disadvantage is that the circular movement of the sheet gripper with partial sinking of the gripper tip into the elastically deforming sheet material and possibly into the material of the gripper pad can result in a shift of the sheet between the gripper pad and sheet gripper. The precise transfer of the sheet between the sheet grippers of two cylinders is thus impaired.

Um dieses Problem zu lösen, sind bereits eine Reihe von Greifein­richtungen an Zylindern bogenverarbeitender Maschinen bekannt, deren Bogengreifer in Schließrichtung senkrecht zur Greiferauflage bzw. radial zum Zylinder bewegt werden. Dadurch soll der Einfluß der Greifer auf das Register ausgeschaltet werden, in dem die Lage des Bogens beim Schließen nicht verändert wird. Hierzu ist es aus der DE-PS 3 632 769 bekannt, einen an einem Klemmstück angelenkten hakenförmigen Greiferfinger, an dem zwei Stützrollen angeordnet sind, die an einer entsprechend gestal­teten Kurve am Zylinder andrückbar sind, aus einer drehenden Bewegungs­phase in eine senkrechte Bewegung zu steuern. Nachteilig ist, daß ein in Führungen, Bohrungen oder dgl. des Klemmstückes mit reichlich Spiel versehbarer Mitnahmestift, der mit dem unteren Ende des Greiferfingers verstiftet ist, beim Einlaufen der oberen Stützrolle in die Geradführung ruckartig anschlägt, so daß der Schließvorgang unsauber eingeleitet wird.In order to solve this problem, a number of gripping devices on cylinders of sheet-processing machines are already known, the sheet grippers of which are moved in the closing direction perpendicular to the gripper support or radially to the cylinder. This is intended to eliminate the influence of the grippers on the register in which the position of the sheet is not changed when it is closed. For this purpose, it is known from DE-PS 3 632 769 to control a hook-shaped gripper finger articulated on a clamping piece, on which two support rollers are arranged, which can be pressed against a correspondingly shaped curve on the cylinder, from a rotating movement phase into a vertical movement. It is disadvantageous that a driver pin, which is provided with plenty of play in the guides, bores or the like of the clamping piece and which is pinned to the lower end of the gripper finger, abruptly strikes when the upper support roller enters the straight guide, so that the closing process is initiated improperly.

Eine senkrecht schließende Greifeinrichtung mit einer gesteuerten Greiferwelle ist aus der DE-PS 2 030 040 bekannt. Von Nachteil ist die kraftschlüssige Steuerung der Greiferwelle relativ zum Drehpunkt eines Steuerhebels mittels einer Führung auf einer Steuerkurve. Der erhebliche Steuerungsaufwand führt zu einer Erhöhung der Massenkräfte eines mit großem Trägheitsradius schwingenden Systems und damit zu einer Ver­minderung des Leistungsvermögens der Druckmaschine.A vertically closing gripping device with a controlled gripper shaft is known from DE-PS 2 030 040. The disadvantage is non-positive control of the gripper shaft relative to the pivot point of a control lever by means of a guide on a control cam. The considerable control effort leads to an increase in the inertial forces of a system vibrating with a large radius of inertia and thus to a reduction in the performance of the printing press.

Aus der DE-PS 488 949 ist ein Klemmgreifer bekannt, dessen Greiferfinger beim Schließen im wesentlichen senkrecht geführt zur Zylinderoberfläche bewegt werden. Von Nachteil ist bei diesem Greifer, daß die senkrecht geführten Greiferfinger zwischen der Zylinderwand und einer Führungs­leiste nur lose, d.h. nicht spielfrei geführt sind. Bei hohen Maschinen­geschwindigkeiten stehen für das Öffnen der Greifer nur wenige Milli­sekunden zur Verfügung und es entstehen schlagartige Belastungen, die zur Erschütterung der Maschine und zu unsauberem Druck führen. Schwingungen der Greiferwelle wirken sich bei diesem Greifer sowohl senkrecht zur Bogenlaufrichtung als auch waagerecht aus, so daß keine lagegenaue Übergabe des Bogens möglich ist.From DE-PS 488 949 a clamp gripper is known, the gripper fingers of which are moved in a substantially perpendicular manner to the cylinder surface when closed. A disadvantage of this gripper is that the vertically guided gripper fingers between the cylinder wall and a guide bar are only loose, i.e. are not performed without play. At high machine speeds, only a few milliseconds are available for opening the grippers, and there are sudden loads that lead to vibration of the machine and unclean pressure. Vibrations of the gripper shaft have an effect on this gripper both perpendicular to the direction of sheet travel and horizontally, so that it is not possible to transfer the sheet in the correct position.

Aus der DE-PS 67 992 ist es bekannt, einen Greifer mittels Klemmstück an einer eine ortsfeste Achse aufweisenden schwenkbaren Greiferwelle zu lagern und eine Greiferzunge in einer ersten Bewegungsphase eine Kreis­bewegung um die Greiferwellenachse und in einer zweiten Bewegungsphase eine in Bezug auf die Greiferauflage annähernd senkrechte Bewegung zu erteilen. Diese Greiferanordnung wirkt aber mit einer kraftschlüssig arbeitenden parallelen Blattfederanordnung und einer Greiferzunge zu­sammen, die keine großen Schließkräfte verträgt, ohne zu beulen. Der Greifer ist demnach für möglichst hohe Schließkräfte völlig ungeeignet.From DE-PS 67 992 it is known to mount a gripper by means of a clamping piece on a swiveling gripper shaft having a fixed axis and a gripper tongue in a first movement phase a circular movement around the gripper shaft axis and in a second movement phase an approximately perpendicular one with respect to the gripper support To give movement. However, this gripper arrangement interacts with a non-positively operating parallel leaf spring arrangement and a gripper tongue which cannot tolerate large closing forces without bulging. The gripper is therefore completely unsuitable for the highest possible closing forces.

Ferner ist es aus der DE-OS 3 130 689 bekannt, in Verbindung mit einer weichen Greiferauflage einen eine flache Greiferflugbahn ausführenden und in der letzten Bewegungsphase senkrecht schließenden Greiferfinger mit einer in dem Greiferfinger angeordneten und gegen den Bogengreifer­aufschlag wirkenden federnden Anschlagschraube zu versehen. Eine weitere Stellschraube ist erforderlich, um federnd miteinander gekoppelte Halter einzustellen, mittels denen der Greiferfinger der Greiferwelle zuge­ordnet ist. Von Nachteil ist, daß der Greiferfinger einer weichen Greiferauflage zugeordnet werden muß und an zwei Stellschrauben um­ständliche Einstellungen erforderlich sind, um eine lagegenaue Übergabe des Bogens zu erreichen. Bei höheren Maschinengeschwindigkeiten wird der Schließvorgang unsaüber durch das Anschlagen der federnden Anschlag­schraube gegen den Bogengreiferaufschlag eingeleitet.Furthermore, it is known from DE-OS 3 130 689, in connection with a soft gripper pad, to provide a flat gripper trajectory which executes a flat gripper trajectory and closes vertically in the last movement phase with a resilient stop screw arranged in the gripper finger and acting against the bow gripper impact. A further set screw is required in order to set resiliently coupled holders by means of which the gripper finger is assigned to the gripper shaft. The disadvantage is that the gripper finger is soft Gripper pad must be assigned and cumbersome settings are required on two adjusting screws in order to achieve a precise transfer of the sheet. At higher machine speeds, the closing process is initiated unspecified by striking the resilient stop screw against the sheet grab.

Schließlich ist aus der DE-PS 3 529 639 ein federnder Klemmgreifer bekannt, der in einer zweiten Bewegungsphase eine senkrechte Schließbe­wegung unabhängig vom Vorhandensein einer weichen Greiferauflage aus­führt. Von Nachteil ist, daß zwei Federn genau aufeinander in der Feder­kraft abgestimmt werden müssen, um ruckartige Bewegungsabläufe bei der Öffnungs- und Schließbewegung des Greifers zu vermeiden.Finally, a resilient clamping gripper is known from DE-PS 3 529 639, which performs a vertical closing movement in a second movement phase, regardless of the presence of a soft gripper pad. The disadvantage is that two springs must be precisely matched to each other in the spring force in order to avoid jerky movements during the opening and closing movement of the gripper.

Aufgabe der Erfindung ist es, den eingangs spezifizierten Bogengreifer so weiterzubilden, daß beim Schließvorgang keine Schiebebewegung ausge­führt wird, d.h. die Lage des Bogens beim Schließen der Greifer durch diesen selbst nicht verändert werden kann.The object of the invention is to develop the arch gripper specified at the outset in such a way that no sliding movement is carried out during the closing process, i.e. the position of the arch when the gripper is closed cannot be changed by the gripper itself.

Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale des Patent­anspruches 1. Weiterbildungen der Erfindung ergeben sich aus den Unter­ansprüchen.This object is achieved by the characterizing features of claim 1. Further developments of the invention result from the subclaims.

Der Hauptvorteil des erfindungsgemäßen Bogengreifers besteht darin, daß das untere Ende des Greiferfingers über eine Nutkurve 23 zwangsgeführt ist und die Greiferspitze 6 vor dem Aufsetzvorgang auf den Bogen prak­tisch in einer Linearbewegung senkrecht zur Greiferauflage 13 bzw. radial zum Zylinder 1 zur Auflage gebracht werden kann. Eine genaue und spielfreie Justierung des Greiferfingers 5 erfolgt dabei nach Art des Fanggabeleffektes unmittelbar vor dem Aufsetzen des Bogengreifers. Der gesamte Bewegungsablauf erfolgt somit ohne Umlenkung durch einen An­schlag. Es können daher selbst bei hohen Geschwindigkeiten keine Schwingungen auf den Greifer und die Greifersteuerung kommen. Die Feder­kraft wird mit nur geringen Verlusten fast vollständig zur Wirkung gebracht.The main advantage of the bow gripper according to the invention is that the lower end of the gripper finger is positively guided via a groove curve 23 and the gripper tip 6 can be brought into support practically in a linear movement perpendicular to the gripper support 13 or radially to the cylinder 1 before the placement process on the sheet. A precise and play-free adjustment of the gripper finger 5 takes place in the manner of the catch fork effect immediately before the bow gripper is put on. The entire sequence of movements thus takes place without being deflected by a stop. Therefore, no vibrations can occur on the gripper and the gripper control even at high speeds. The spring force is almost fully brought into effect with only minor losses.

Die senkrechte Führung des unteren Endes des Greiferfingers 5 in der letzten Bewegungsphase verhindert auch, daß sich die Durchbiegung der Greiferwelle 3 und deren kreisförmige Bewegung als Greiferverschiebung in der Greiferspitze 6 auswirken. Wird die Nutkurve 25 am unteren Ende des Greiferfingers 5 geöffnet, kann der Greiferfinger 5 leicht demon­tiert werden, ohne die Greiferwelle 3 demontieren zu müssen. Ferner ist der Greifer im Greiferbiß (Greiferhaltekraft) fein justierbar und somit zum Überdrücken bei unterschiedlichen Materialstärken mit einer genau vorbestimmten Haltekraft ausgestattet. Die Federkraft der Druckfeder 9 bewirkt, daß sich beim Schließen und beim Öffnen des Greiferfingers 5 die Zentrierung auf dem Gelenkbolzen 11 und auf der zur Greiferwelle 3 achsparallelen Stange 21 nicht löst. Die Achsiallage des Greiferfingers 5 bleibt in jeder Bewegungsphase, d.h. auch in der senkrechten Be­wegungsphase genau durch die Führung der Seitenwände 15 des Kastenteiles 26 des Greiferfingers 5 an dem auf der Greiferwelle 3 befestigten Mit­nehmerarm 7 festgelegt.The vertical guidance of the lower end of the gripper finger 5 in the last phase of movement also prevents the deflection of the gripper shaft 3 and its circular movement from acting as a gripper displacement in the gripper tip 6. If the groove curve 25 is opened at the lower end of the gripper finger 5, the gripper finger 5 can be easily dismantled without having to dismantle the gripper shaft 3. Furthermore, the gripper is finely adjustable in the gripper bite (gripper holding force) and is therefore equipped with a precisely predetermined holding force for overpressing with different material thicknesses. The spring force of the compression spring 9 has the effect that when the gripper finger 5 is closed and opened, the centering on the hinge pin 11 and on the rod 21, which is parallel to the gripper shaft 3, is not released. The axial position of the gripper finger 5 remains in every phase of movement, i.e. also in the vertical movement phase precisely by guiding the side walls 15 of the box part 26 of the gripper finger 5 on the driver arm 7 fastened to the gripper shaft 3.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand einer Zeichnung näher beschrieben.An embodiment of the invention is described below with reference to a drawing.

Es zeigt:

  • Fig. 1 eine Seitenansicht des kompletten Bogen­greifers, teilweise im Schnitt und eine mit ihm zusammenarbeitende Greiferauflage, die an einem Teil eines Zylinders einer Bogendruckmaschine angeordnet ist,
  • Fig. 2 eine Draufsicht auf Fig. 1,
  • Fig. 3 die Öffnungs- und Schließbewegung des Bogen­greifers in den wesentlichen Bewegungsphasen.
It shows:
  • 1 is a side view of the complete sheet gripper, partly in section, and a gripper pad which cooperates with it and which is arranged on part of a cylinder of a sheet-fed printing press,
  • 2 is a plan view of FIG. 1,
  • Fig. 3 shows the opening and closing movement of the sheet gripper in the main phases of movement.

Eine Greiferwelle 3 ist mit ortsfester Achse im Zylinder 1 schwenkbar gelagert. Die Bewegung wird in bekannter Weise über einen nicht darge­stellten Rollenhebel gesteuert, dessen Rolle mit einer ebenfalls nicht dargestellten Kurvenscheibe zusammenwirkt. Die Greiferwelle 3 ist in der Zylindergrube 2 in mehreren Lagerböcken 4 gelagert. Der hakenförmige Greiferfinger 5 des Bogengreifers ist in einem mittleren Bereich zwischen Greiferspitze 6 und dem unteren Ende des Greiferfingers 5 als nach außen offenes Kastenteil 26 ausgebildet, zwischen dessen Seiten­wänden 15 ein mit der Greiferwelle 3 fest verbundener und für jeden Greiferfinger 5 einzeln vorgesehener Mitnehmerarm7 eines Mitnehmer­hebels 12 zum Teil aufgenommen wird. Der Mitnehmerhebel 12 ist mittels einer Schraube 8 auf der Greiferwelle 3 geklemmt. In dem Kastenteil 26 des Greiferfingers 5 ist ein Mitnahmestift 11 drehbar gelagert, der in einer Nutkurve 19 des Mitnehmerarmes 7 des Mitnehmerhebels 12 aufge­nommen ist, die im Radius r dem Greiferwellendrehpunkt 17 zugeordnet ist. Die innenseiten der Seitenwände 15 des Greiferfingers 5 dienen an dem Mitnehmerarm 7 des Mitnehmerhebels 12 als Anlageflächen zur Fest­legung der Achsiallage des Greiferfingers 5. Der Greiferfinger 5 ist dem Mitnehmerhebel 12 kraftschlüssig über eine Druckfeder 9 und einstellbar über eine Justierschraube 10 zugeordnet, die in eine Gewindebohrung des Mitnehmerarmes 7 eingeschraubt ist. Der Mitnahmestift 11 liegt in der Nutkurve 19 des Mitnehmerarmes 7 auf der in einer Gewindebohrung einge­schraubten Justierschraube 10 unter der Kraftwirkung der Druckfedern 9. Die Druckfeder 9 stützt sich dabei mit einem Ende auf dem Mitnehmerstift 11 und mit dem anderen Ende - in der Nutkurve 19 geführt - auf einer Schraube 14 des Mitnehmerarmes 7 ab. Die Schraube 14 an der Druckfeder 9 erlaubt es, die Greiferschließkraft einzustellen. Durch Verstellen des gesamten Bogengreifers nach Lösen der Schraube 8 ist eine Grobein­stellung möglich und durch die Justierschraube 10 eine Feineinstellung auf die zu verarbeitende Bogenstütze derart möglich, daß für alle Grei­fer einer Greiferreihe der Öffnungs- bzw. Schließvorgang gleichzeitig, d.h. mit gleicher Winkelstellung der Greiferwelle 3 eingeleitet wird.A gripper shaft 3 is pivotally mounted in the cylinder 1 with a fixed axis. The movement is controlled in a known manner via a roller lever, not shown, the roller of which cooperates with a cam disc, also not shown. The gripper shaft 3 is in the Cylinder pit 2 stored in several bearing blocks 4. The hook-shaped gripper finger 5 of the sheet gripper is formed in a central region between the gripper tip 6 and the lower end of the gripper finger 5 as a box part 26 open to the outside, between the side walls 15 of which a driver arm 7 of a driver lever, which is firmly connected to the gripper shaft 3 and is provided individually for each gripper finger 5 12 is included in part. The driver lever 12 is clamped on the gripper shaft 3 by means of a screw 8. A drive pin 11 is rotatably mounted in the box part 26 of the gripper finger 5 and is received in a groove curve 19 of the drive arm 7 of the drive lever 12, which is assigned to the gripper shaft pivot point 17 in radius r. The inside of the side walls 15 of the gripper finger 5 serve on the driver arm 7 of the driver lever 12 as contact surfaces for fixing the axial position of the gripper finger 5. The gripper finger 5 is non-positively connected to the driver lever 12 via a compression spring 9 and adjustable via an adjusting screw 10 which is inserted into a threaded bore the driver arm 7 is screwed. The driving pin 11 lies in the groove curve 19 of the driving arm 7 on the adjusting screw 10 screwed into a threaded bore under the force of the compression springs 9. The compression spring 9 is supported with one end on the driving pin 11 and with the other end - guided in the groove curve 19 - On a screw 14 of the driving arm 7. The screw 14 on the compression spring 9 allows the gripper closing force to be adjusted. By adjusting the entire sheet gripper after loosening the screw 8, a coarse adjustment is possible and by adjusting screw 10 a fine adjustment to the arch support to be processed is possible in such a way that the opening or closing process for all grippers in a row of grippers simultaneously, ie with the same angular position of the gripper shaft 3 is initiated.

Die von der Greiferwelle 3 eingeleitete Kreisbewegung wird durch eine Zusatzbewegung mit Geradführungsanteil überlagert, die von einer weite­ren Nutkurve 23 am unteren Ende des Greiferfingers 5 erzeugt wird. In der Nutkurve 23 ist der Greiferfinger 5 genau passend durch eine Stange 21 geführt, deren Achse 20 parallel zum Greiferwellendrehpunkt 17 der Greiferwelle 3 im Zylinder 1 ortsfest angeordnet ist. Die Nutkurve 23 weist eine Geradführung in radialer Richtung des Zylinders 1 durch ein gerades Kurventeil 25 nach Art einer Fanggabel auf, so daß die Greifer­finger 5 beim Öffnen von der Greiferauflage 13 anfänglich in radialer Richtung, d.h. senkrecht zur Greiferauflage 13 geführt werden. An dieses Geradfünrungskurventeil 25 schließt sich ein bogenförmiges Teil 24 an, so daß anschließend der Greiferfinger 5 bogenförmig in einer Richtung mit tangentialer Komponente geführt wird. Beim Schließen des Bogen­greifers läuft dieser Vorgang in umgekehrter Reihenfolge ab. Die einzel­nen Phasen dieses Bewegungsablaufes sind in der Fig. 3 verdeutlicht, wobei die Phasen an den Bezugszeichen durch Indexstriche rechts oben gekennzeichnet sind.The circular movement initiated by the gripper shaft 3 is superimposed by an additional movement with a straight guide component, which is generated by a further groove curve 23 at the lower end of the gripper finger 5. In the groove curve 23, the gripper finger 5 is guided in a precisely fitting manner through a rod 21, the axis 20 of which is arranged in a stationary manner in the cylinder 1 parallel to the gripper shaft pivot point 17 of the gripper shaft 3. The groove curve 23 has a straight line in the radial direction of the cylinder 1 straight curve part 25 in the manner of a catch fork, so that when the gripper pad 13 is opened, the gripper fingers 5 are initially guided in the radial direction, ie perpendicular to the gripper pad 13. This straight part 25 is followed by an arcuate part 24, so that the gripper finger 5 is then guided in an arc in one direction with a tangential component. When closing the sheet gripper, this process takes place in reverse order. The individual phases of this movement sequence are illustrated in FIG. 3, the phases being identified by reference marks at the top right of the reference symbols.

Infolge Überlagerung der durch die Greifersteuerung über Steuerkurve, Rollenhebel, Greiferwelle 3, Mitnehmer 7, 11, 12 eingeleiteten Bewegung mit der durch die Nutkurve 23 über die Stange 21 eingeleiteten Bewegung kann je nach gewähltem Kurvenverlauf auch eine flache Flugbahn des Greiferfingers 5 erzeugt werden, um die Greiferspitze 6 schnell aus dem Bogenlauf beim Öffnen herauszuschwenken, wobei zuvor das senkrechte Abheben auf einer kurzen Wegstrecke von ca. 2mm erfolgt ist.As a result of the superimposition of the movement initiated by the gripper control via control cam, roller lever, gripper shaft 3, driver 7, 11, 12 with the movement initiated by the groove curve 23 via the rod 21, a flat trajectory of the gripper finger 5 can also be generated, depending on the curve shape selected to quickly swivel the gripper tip 6 out of the sheet path when opening, the vertical lifting having been carried out beforehand over a short distance of approximately 2 mm.

Soll der Greiferfinger 5 einzeln leicht demontiert werden können, muß die Nutkurve 23 am bogenförmigen Teil 24 durch den Rand des Greifer­fingers 5 hindurchgeführt werden, so daß unten ein Schlitz entsteht. Nach Lösen des Mitnehmerstiftes 11 kann dann der Greiferfinger 5 aus seiner Betriebsstellung ausgefädelt werden. Die Greiferauflage 13 kann am Zylinder 1 mittels Schraube 16 befestigt sein.If the gripper finger 5 can be easily dismantled individually, the groove curve 23 on the arcuate part 24 must be passed through the edge of the gripper finger 5 so that a slot is created at the bottom. After loosening the driver pin 11, the gripper finger 5 can then be threaded out of its operating position. The gripper pad 13 can be attached to the cylinder 1 by means of screw 16.

Im Zylinder 1 ist ferner eine Aussparung 27 vorgesehen, um die freie Bewegung des Greiferfingers 5 zu ermöglichen. Die Schließrichtung senkrecht zur Greiferauflage 13 ist mit 22 in der Fig. 3 gekennzeichnet.A recess 27 is also provided in the cylinder 1 in order to enable the gripper finger 5 to move freely. The closing direction perpendicular to the gripper pad 13 is identified by 22 in FIG. 3.

BezugszeichenlisteReference symbol list

  • 1 Zylinder1 cylinder
  • 2 Zylindergrube2 cylinder pit
  • 3 Greiferwelle3 gripper shaft
  • 4 Lagerbock4 bearing block
  • 5 Greiferfinger5 gripper fingers
  • 6 Greiferspitze6 gripper tip
  • 7 Mitnehmerarm7 drive arm
  • 8 Schraube8 screw
  • 9 Druckfeder9 compression spring
  • 10 Justierschraube10 adjusting screw
  • 11 Mitnahmestift11 Driving pin
  • 12 Mitnehmerhebel12 driver levers
  • 13 Greiferauflage13 gripper pad
  • 14 Schraube14 screw
  • 15 Seitenwände15 side walls
  • 16 Schraube16 screw
  • 17 Greiferwellendrehpunkt17 gripper shaft pivot point
  • 18 Schraube18 screw
  • 19 Nutkurve19 groove curve
  • 20 Achse20 axis
  • 21 Stange21 rod
  • 22 Schließrichtung22 closing direction
  • 23 Nutkurve23 groove curve
  • 24 bogenförmiger Teil24 arcuate part
  • 25 radialer Teil25 radial part
  • 26 Kastenteil26 box part
  • 27 Aussparung27 recess

Claims (3)

1.) Bogengreifer für bogenverarbeitende Maschinen, mit einem Greifer­finger, dessen Grundkörper ein nach außen offenes Kastenteil auf­weist, zwischen dessen Seitenwänden ein Mitnehmerarm eines mit der Greiferwelle fest verbundener und für jeden Greiferfinger einzeln vorgesehener Mitnehmerhebel zum Teil aufgenommen wird, wobei die Innenseiten dieser Seitenwände an dem Mitnehmerarm als Anlage­flächen zur Festlegung der Axiallage des Greiferfingers dienen,
dadurch gekennzeichnet,
daß der Greiferfinger (5) der Verbindungslinie Greiferwellen­drehpunkt (17) und Drehpunkt eines im Kastenteil (26) etwa in der Mitte des Greiferfingers (5) parallel zur Greiferwelle (3) ange­ordneten drehbar gelagerten Mitnahmestiftes (11) in einem Winkel von ca. 90o zugeordnet ist, daß der Mitnahmestift (11) in einer Nutkurve (19) des Mitnehmerarmes (7) des Mitnehmerhebels (12) mittels einer Justierschraube (10) unter der Kraftwirkung einer in der Nutkurve (19) vorgesehenen Druckfeder (9) abgestützt ist und daß am unteren Ende des Greiferfingers (5) eine weitere Nutkurve (23) vorgesehen ist, in der der Greiferfinger (5) genau passend durch eine Stange (21) geführt ist, deren Achse (20) parallel zum Greiferwellendrehpunkt (17) der Greiferwelle (3) im Zylinder (1) verläuft, wobei die Nutkurve (23) ein in radialer Richtung des Zylinders (1) weisendes Kurventeil (25) nach Art einer Fanggabel bildet, an das sich ein bogenförmiges Teil (24) anschließt, so daß die Greiferfinger (5) beim Öffnen anfänglich in radialer Richtung, d.h. senkrecht von der Greiferauflage (13) und anschließend bogen­förmig in einer Richtung mit tangentialer Komponente geführt werden bzw. umgekehrt beim Schließen der Bogengreifer.
1.) Bow gripper for sheet-processing machines, with a gripper finger, the base body of which has an open-to-the-box part, between the side walls of which a driver arm of a driver lever which is firmly connected to the gripper shaft and is provided individually for each gripper finger is partially accommodated, the inner sides of these side walls being attached serve the driving arm as contact surfaces for determining the axial position of the gripper finger,
characterized by
that the gripper finger (5) of the connecting line gripper shaft pivot point (17) and pivot point of a rotatably mounted driving pin (11) arranged in the box part (26) approximately in the middle of the gripper finger (5) parallel to the gripper shaft (3) at an angle of approximately 90 ° is assigned that the driving pin (11) is supported in a groove curve (19) of the driving arm (7) of the driving lever (12) by means of an adjusting screw (10) under the force of a compression spring (9) provided in the groove curve (19) and that A further groove curve (23) is provided at the lower end of the gripper finger (5), in which the gripper finger (5) is guided through a rod (21) whose axis (20) is parallel to the gripper shaft pivot point (17) of the gripper shaft (3 ) runs in the cylinder (1), the groove curve (23) forming a curve part (25) pointing in the radial direction of the cylinder (1) in the manner of a catch fork, to which an arcuate part (24) adjoins, so that the gripper fingers ( 5) b When opening, initially in the radial direction, ie perpendicularly from the gripper support (13) and then in an arc in one direction with a tangential component or vice versa when closing the arch gripper.
2.) Bogengreifer nach Anspruch 1,
dadurch gekennzeichnet,
daß die Druckfeder (9) mit einem Ende auf dem Mitnahmestift (11) und mit dem anderen Ende auf einer Schraube (14) des Mitnehmerarmes (7) abgestützt ist.
2.) sheet gripper according to claim 1,
characterized by
that the compression spring (9) is supported at one end on the driving pin (11) and at the other end on a screw (14) of the driving arm (7).
3.) Bogengreifer nach Anspruch 1,
dadurch gekennzeichnet,
daß das bogenförmige Teil (24) der Nutkurve (23) am unteren Rand des Greiferfingers (5) durchgehend ausgebildet ist, so daß ein Schlitz nach außen offen ist.
3.) sheet gripper according to claim 1,
characterized by
that the arcuate part (24) of the groove curve (23) at the lower edge of the gripper finger (5) is continuous, so that a slot is open to the outside.
EP90108551A 1989-06-10 1990-05-07 Sheet gripper for sheet working machines Expired - Lifetime EP0402615B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90108551T ATE104212T1 (en) 1989-06-10 1990-05-07 SHEET GRIPPER FOR SHEET PROCESSING MACHINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3919088A DE3919088A1 (en) 1989-06-10 1989-06-10 BOW GRIPPER FOR BOW-PROCESSING MACHINES
DE3919088 1989-06-10

Publications (3)

Publication Number Publication Date
EP0402615A2 true EP0402615A2 (en) 1990-12-19
EP0402615A3 EP0402615A3 (en) 1991-05-29
EP0402615B1 EP0402615B1 (en) 1994-04-13

Family

ID=6382556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90108551A Expired - Lifetime EP0402615B1 (en) 1989-06-10 1990-05-07 Sheet gripper for sheet working machines

Country Status (3)

Country Link
EP (1) EP0402615B1 (en)
AT (1) ATE104212T1 (en)
DE (2) DE3919088A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10336715A1 (en) 2002-09-06 2004-03-18 Heidelberger Druckmaschinen Ag Gripper device for a sheet processing printer or rotary printer, has separate drives for the gripper and gripper support so that gripper chatter is reduced during high speed printing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2030040A1 (en) * 1969-06-20 1970-12-23 Miller Printing Machinery Co
DE3130689A1 (en) * 1980-11-17 1982-07-01 VEB Kombinat Polygraph "Werner Lamberz" Leipzig, DDR 7050 Leipzig ARCH GRIPPER DEVICE
EP0212367A2 (en) * 1985-08-19 1987-03-04 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Spring-mounted gripper for sheet-fed rotary printing machines
EP0261412A2 (en) * 1986-09-26 1988-03-30 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Clamping gripper for sheet-fed rotary presses

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE488949C (en) * 1930-01-11 Albert Schnellpressen Cylindrical grippers movable perpendicular to the gripper base
DD67992A (en) *
DE3529639A1 (en) * 1985-08-19 1987-02-26 Roland Man Druckmasch SPRING GRIPPER FOR ARC ROTATION PRINTING MACHINES
DE3623405A1 (en) * 1986-07-11 1988-02-04 Miller Johannisberg Druckmasch BOW GRIPPER FOR BOW-PROCESSING MACHINES

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2030040A1 (en) * 1969-06-20 1970-12-23 Miller Printing Machinery Co
DE3130689A1 (en) * 1980-11-17 1982-07-01 VEB Kombinat Polygraph "Werner Lamberz" Leipzig, DDR 7050 Leipzig ARCH GRIPPER DEVICE
EP0212367A2 (en) * 1985-08-19 1987-03-04 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Spring-mounted gripper for sheet-fed rotary printing machines
EP0261412A2 (en) * 1986-09-26 1988-03-30 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Clamping gripper for sheet-fed rotary presses

Also Published As

Publication number Publication date
DE3919088A1 (en) 1990-12-13
EP0402615A3 (en) 1991-05-29
DE59005315D1 (en) 1994-05-19
ATE104212T1 (en) 1994-04-15
EP0402615B1 (en) 1994-04-13

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