EP0261412A2 - Clamping gripper for sheet-fed rotary presses - Google Patents

Clamping gripper for sheet-fed rotary presses Download PDF

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Publication number
EP0261412A2
EP0261412A2 EP87112207A EP87112207A EP0261412A2 EP 0261412 A2 EP0261412 A2 EP 0261412A2 EP 87112207 A EP87112207 A EP 87112207A EP 87112207 A EP87112207 A EP 87112207A EP 0261412 A2 EP0261412 A2 EP 0261412A2
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EP
European Patent Office
Prior art keywords
gripper
finger
sheet
spring
roller
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
EP87112207A
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German (de)
French (fr)
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EP0261412A3 (en
EP0261412B1 (en
Inventor
Rudolf Raab
Manfred Herold
Peter Hummel
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Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT87112207T priority Critical patent/ATE74064T1/en
Publication of EP0261412A2 publication Critical patent/EP0261412A2/en
Publication of EP0261412A3 publication Critical patent/EP0261412A3/en
Application granted granted Critical
Publication of EP0261412B1 publication Critical patent/EP0261412B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers
    • B41F21/104—Gripper details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/04—Grippers

Definitions

  • the invention relates to a clamping gripper for sheet-fed rotary printing machines according to the preamble of the first claim.
  • a clamp gripper of the type mentioned is known from DE-PS 488 949.
  • the disadvantage is that the hook-shaped gripper finger between the cylinder wall and a guide bar is only loose, i.e. is 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 affect this gripper both perpendicular to the sheet running direction and horizontally, so that it is not possible to transfer the sheet in an accurate position.
  • DD-PS 66 634 From DD-PS 66 634 it is known to support a one-piece gripper lever on a gripper shaft and to adjust its pretensioning force by means of two compression springs.
  • the disadvantage is that the gripper lever loses its statically determined position if the most possible possible compensation of the bearing force is to be achieved. At very high machine speeds, insufficient centering, e.g. possible due to disturbing vibrations that are introduced into the machine.
  • Another disadvantage is the relatively large radius of inertia and the mass of the vibrating parts for initiating the holding process.
  • a gripper is known in which the axis of the gripper finger joint is pivotally mounted in a swivel joint parallel to the gripper shaft, the axis of the gripper finger joint being approximately on the gripper Pointed pioneering extension of a straight line is located, which connects the support surface for the gripper tip with the axis of the gripper shaft. From the geometry shown in Fig. 1 it can be seen that the force exerted by the gripper tip on the gripper support continues to have a component in the direction of sheet travel. As a result, there is still a risk of the arc shifting, as well as a possible torsion of the gripper shaft with high pretensioning forces, although an improvement over conventional grippers with a circular movement about the gripper shaft axis can be achieved.
  • a vertically closing gripper with a controlled gripper shaft is known from DE-PS 2 030 040.
  • a disadvantage is the frictional control of the gripper shaft relative to the pivot point of a control lever by means of a guide on a control cam. The additional control effort leads to an increase in the inertial forces of the system vibrating with a large radius of inertia and thus to a reduction in the performance of the printing press.
  • DE-OS 3 130 689 discloses a flat gripper in conjunction with a soft gripper pad To provide trajectory-executing and vertically closing gripper fingers 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 must be assigned to a soft gripper pad, and cumbersome adjustments are required on two adjusting screws in order to achieve a precise transfer of the sheet. The closing process is initiated improperly at higher machine speeds.
  • a resilient clamping gripper which performs a vertical closing movement in a second movement phase, regardless of the presence of a soft gripper pad.
  • the beginning of the last movement phase must be adjusted by fine adjustment of the gripper tip to the holding surface of the gripper bar.
  • the spring force of two springs must be precisely matched to one another in order to avoid jerky movements during the opening and closing movements of the gripper.
  • the object of the invention is to further develop a clamping gripper of the type mentioned in such a way that a seamless transition from a play-free rotating movement phase to a play-free movement phase of the hook-shaped gripper finger perpendicular to the gripper pad is made possible.
  • the advantage of the solution according to the invention is in particular that vibrations of the gripper shaft can only act vertically and no longer horizontally, the holding surface of the gripper not having to be made of elastic material and a fine adjustment of springs is unnecessary.
  • the hook-shaped gripper finger has a seamless, play-free transition from the first movement phase to the last movement phase without causing the gripper tip to be pushed.
  • Clamping grippers of this type are particularly suitable for achieving high holding forces between gripper tips and curved gripper pads made of hard structured materials, e.g. Titanium carbides, which can no longer wear out as quickly as with the known clamp grippers due to the grinding effect of the paper.
  • Fig. 1 the linear movement of a hook-shaped gripper finger 2 is shown schematically in all its phases of movement.
  • the hook-shaped gripper finger 2 is articulated in the clamping piece 1, 14 with its lower end by means of a driving pin 6 and is connected to one at the upper end of the hook-shaped gripper fingers 2 arranged compression spring 7 pressed over rollers 5 and 10 to a gripper bar 4.
  • the compression spring 7 assumes both the function of the gripper impact force and the function of the contact pressure of the rollers 5, 10 on the gripper impact bar 4.
  • the roller 10 is supported on an oblique curve part 12 on the gripper impact bar 4, which is seamless in a straight guide 11 perpendicular to Holding surface 13 of the gripper bar 4 passes.
  • both rollers 5, 10 are supported without play on the straight guide 11, so that pushing of the gripper tip 9 is avoided during the opening and closing process, regardless of whether a soft gripper pad is present.
  • the gripper shaft 3 is rotated, the hook-shaped gripper finger 2 first moves perpendicularly to the holding surface 13 of the gripper bar 4 by the driving pin 6 upwards.
  • the upper roller 10 reaches the inclined curve part 12 on the gripper bar 4, the swiveling of the gripper begins in order to be able to dive in or away from the paper edge.
  • the gripper closes without any vibrations having an effect in the direction of sheet travel.
  • a fine adjustment of the gripper tip 9 to the holding surface 13 of the gripper bar 4 is not necessary, for example on different gripping surfaces at the edge of the sheet or sheet thickness.
  • the clamping gripper shown in Figures 2 and 3 has an additional spring 8, which is arranged between the clamping piece 1 and the lower end of the hook-shaped gripper finger 2 and whose line of action lies on a straight line through the center of the gripper shaft 3, the driving pin 6 and the roller 5 runs at the lower end of the hook-shaped gripper finger 2.
  • this second spring 8 the influence of the bearing force on the driving pin 6 can be compensated Ren. It is not absolutely necessary for the function of the clamp gripper.
  • the clamping gripper is particularly suitable for pairings of holding surfaces on the sheet gripper pad 4 and on the gripper tip 9, which are made of very hard structured material. A wear of these holding surfaces by the abrasive paper can no longer take place, so that their positive locking takes place without wear over a longer service life. Since no settings are required, the clamp gripper is also easy to service. Since the hook - shaped gripper finger 2 is spring loaded on the clamping piece 1 and not on the gripper shaft and is cam - controlled without play, it has only a low tendency to maintenance, since on the rotating parts, the rollers 5 and 10 and the bearing points on the gripper finger 2 or hardly any wear occurs on the guide surfaces on the gripper bar 4.

Abstract

A sheet gripper for a rotary press is provided having a hooked gripper finger pivotably connected at its lower end to a clamping element, and a roller disposed upon the gripper finger is biased against the guiding surfaces of a finger support element to ensure smooth changes from open and closed gripper finger positions, substantially without any vibrational motion or displacement resulting in the plane of sheet motion. Preferably, a compression spring is mounted in the clamping element to bias the roller against the gripper support element, the element having a rectilinear guide surface disposed substantially perpendicularly to a retaining surface, and a cam surface which extends upwardly and inclined outwardly from the rectilinear guide surface. Upon oscillation of the gripper shaft, the roller is guided along the rectilinear guide surface and cam surface, thereby defining accurate gripper finger motion.

Description

Die Erfindung betrifft einen Klemmgreifer für Bogenrotations­druckmaschinen nach dem Oberbegriff des ersten Patentan­spruches.The invention relates to a clamping gripper for sheet-fed rotary printing machines according to the preamble of the first claim.

Ein Klemmgreifer genannter Gattung ist bekannt aus der DE-PS 488 949.A clamp gripper of the type mentioned is known from DE-PS 488 949.

Von Nachteil ist, daß der hakenförmige Greiferfinger zwischen der Zylinderwand und einer Führungsleiste nur lose, d.h. nicht spielfrei geführt ist. 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 unsauberen 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.The disadvantage is that the hook-shaped gripper finger between the cylinder wall and a guide bar is only loose, i.e. is 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 affect this gripper both perpendicular to the sheet running direction and horizontally, so that it is not possible to transfer the sheet in an accurate position.

Aus der DD-PS 66 634 ist es bekannt, einen einteiligen Grei­ferhebel auf einer Greiferwelle abzustützen und dessen Vor­spannkraft durch zwei Druckfedern einzustellen. Von Nachteil ist, daß der Greiferhebel seine statisch bestimmte Lage ver­liert, wenn eine möglichst vollständige Kompensation der Lagerkraft erreicht werden soll. Bei sehr hohen Maschinenge­schwindigkeiten ist keine ausreichende Zentrierung z.B. in­folge Störschwingungen, die in die Maschine eingebracht wer­den, mehr möglich. Von Nachteil sind ferner der verhältnis­mäßig große Trägheitsradius und die Masse der schwingenden Teile für das Einleiten des Haltevorganges.From DD-PS 66 634 it is known to support a one-piece gripper lever on a gripper shaft and to adjust its pretensioning force by means of two compression springs. The disadvantage is that the gripper lever loses its statically determined position if the most possible possible compensation of the bearing force is to be achieved. At very high machine speeds, insufficient centering, e.g. possible due to disturbing vibrations that are introduced into the machine. Another disadvantage is the relatively large radius of inertia and the mass of the vibrating parts for initiating the holding process.

Aus der DE-OS 1 908 181 ist ein Greifer bekannt, bei dem die Achse des Greiferfingergelenkes in einem zur Greiferwelle parallelen Drehgelenk schwenkbar gelagert ist, wobei die Achse des Greiferfingergelenks annähernd auf der Greifer­ spitze wegweisenden Verlängerung einer Geraden gelegen ist, welche die Abstützfläche für die Greiferspitze mit der Achse der Greiferwelle verbindet. Aus der in Fig. 1 gezeigten Geometrie geht hervor, daß die von der Greiferspitze auf die Greiferauflage ausgeübte Kraft weiterhin eine Komponente in Bogenlaufrichtung aufweist. Die Gefahr des Verschiebens des Bogens besteht dadurch, sowie durch eine mögliche Torsion der Greiferwelle bei hohen Vorspannkräften auch weiterhin, wenn auch eine Verbesserung gegenüber üblichen Greifern mit kreis­förmiger Bewegung um die Greiferwellenachse erreichbar ist.From DE-OS 1 908 181 a gripper is known in which the axis of the gripper finger joint is pivotally mounted in a swivel joint parallel to the gripper shaft, the axis of the gripper finger joint being approximately on the gripper Pointed pioneering extension of a straight line is located, which connects the support surface for the gripper tip with the axis of the gripper shaft. From the geometry shown in Fig. 1 it can be seen that the force exerted by the gripper tip on the gripper support continues to have a component in the direction of sheet travel. As a result, there is still a risk of the arc shifting, as well as a possible torsion of the gripper shaft with high pretensioning forces, although an improvement over conventional grippers with a circular movement about the gripper shaft axis can be achieved.

Aus der DD-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 erträgt, ohne zu beulen. Der Greifer ist demnach für mög­lichst hohe Schließkräfte völlig ungeeignet.From DD-PS 67 992 it is known to mount a gripper by means of a clamping piece on a pivotable 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-positive parallel leaf spring arrangement and a gripper tongue that cannot withstand large closing forces without bulging. The gripper is therefore completely unsuitable for the highest possible closing forces.

Ein senkrecht schließender Greifer 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 zusätzliche Steuerungsaufwand führt zu einer Erhöhung der Massenkräfte des mit großem Trägheitsradius schwingenden Systems und damit zu einer Ver­minderung des Leistungsvermögens der Druckmaschine.A vertically closing gripper with a controlled gripper shaft is known from DE-PS 2 030 040. A disadvantage is the frictional control of the gripper shaft relative to the pivot point of a control lever by means of a guide on a control cam. The additional control effort leads to an increase in the inertial forces of the system vibrating with a large radius of inertia and thus to a reduction in the performance of the printing press.

Ferner ist aus der DE-OS 3 130 689 bekannt, in Verbindung mit einer weichen Greiferauflage einen eine flache Greifer­ flugbahn 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 unsauber eingeleitet.Furthermore, DE-OS 3 130 689 discloses a flat gripper in conjunction with a soft gripper pad To provide trajectory-executing and vertically closing gripper fingers 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 must be assigned to a soft gripper pad, and cumbersome adjustments are required on two adjusting screws in order to achieve a precise transfer of the sheet. The closing process is initiated improperly at higher machine speeds.

Aus der nachveröffentlichten Patentanmeldung P 35 29 639.9-27 ist zwar ein federnder Klemmgreifer bekannt, der in einer zweiten Bewegungsphase eine senkrechte Schließbewegung unab­hängig vom Vorhandensein einer weichen Greiferauflage aus­führt. Der Beginn der letzten Bewegungsphase muß aber durch Feineinstellung der Greiferspitze zur Haltefläche der Grei­feraufschlagleiste eingestellt werden. Außerdem müssen zwei Federn genau aufeinander in der Federkraft abgestimmt werden, um ruckartige Bewegungsabläufe bei der Öffnungs- und Schließ­bewegung des Greifers zu vermeiden.From the post-published patent application P 35 29 639.9-27, a resilient clamping gripper is known, which performs a vertical closing movement in a second movement phase, regardless of the presence of a soft gripper pad. The beginning of the last movement phase must be adjusted by fine adjustment of the gripper tip to the holding surface of the gripper bar. In addition, the spring force of two springs must be precisely matched to one another in order to avoid jerky movements during the opening and closing movements of the gripper.

Aufgabe der Erfindung ist es, einen Klemmgreifer genannter Art derart weiter zubilden, daß ein nahtloser Übergang von einer spielfreien drehenden Bewegungsphase in eine spielfreie Bewegungsphase des hakenförmigen Greiferfingers senkrecht zur Greiferauflage ermöglicht wird.The object of the invention is to further develop a clamping gripper of the type mentioned in such a way that a seamless transition from a play-free rotating movement phase to a play-free movement phase of the hook-shaped gripper finger perpendicular to the gripper pad is made possible.

Die Aufgabe wird durch die kennzeichnenden Merkmale der Pa­tentansprüche gelöst. Weiterbildungen der Erfindung ergeben sich aus der Zeichnung und der Beschreibung.The object is achieved by the characterizing features of the claims. Further developments of the invention result from the drawing and the description.

Der Vorteil der erfindungsgemäßen Lösung besteht insbesondere darin, daß Schwingungen der Greiferwelle sich nur noch senk­recht und nicht mehr waagerecht auswirken können, wobei die Haltefläche des Greiferaufschlages nicht aus elastischem Material zu bestehen braucht und eine Feineinstellung von Federn sich erübrigt. Der hakenförmige Greiferfinger weist einen nahtlosen spielfreien Übergang von der ersten Bewe­gungsphase in die letzte Bewegungsphase auf, ohne ein Schie­ben der Greiferspitze zu bewirken. Derartige Klemmgreifer eignen sich besonders zur Erzielung großer Haltekräfte zwi­schen Greiferspitzen und Bogengreiferaufschlägen aus harten strukturierten Werkstoffen, z.B. Titankarbiden, die nicht mehr so schnell wie bei den bekannten Klemmgreifern durch die schleifende Wirkung des Papiers verschleißen können.The advantage of the solution according to the invention is in particular that vibrations of the gripper shaft can only act vertically and no longer horizontally, the holding surface of the gripper not having to be made of elastic material and a fine adjustment of springs is unnecessary. The hook-shaped gripper finger has a seamless, play-free transition from the first movement phase to the last movement phase without causing the gripper tip to be pushed. Clamping grippers of this type are particularly suitable for achieving high holding forces between gripper tips and curved gripper pads made of hard structured materials, e.g. Titanium carbides, which can no longer wear out as quickly as with the known clamp grippers due to the grinding effect of the paper.

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

Es zeigen:

  • Fig. 1 die Öffnungs- und Schließbewegung des hakenförmigen Greiferfingers, schematisch,
  • Fig. 2 eine Ausführung des Klemmgreifers in Seitenansicht,
  • Fig. 3 eine Draufsicht auf den Klemmgreifer nach Fig. 2.
Show it:
  • 1 shows the opening and closing movement of the hook-shaped gripper finger, schematically,
  • 2 shows an embodiment of the clamp gripper in side view,
  • 3 is a top view of the clamping gripper according to FIG. 2.

In Fig. 1 ist die Linearbewegung eines hakenförmigen Greifer­fingers 2 in all ihren Bewegungsphasen schematisch darge­stellt. Der hakenförmige Greiferfinger 2 ist im Klemmstück 1, 14 mit seinem unteren Ende mittels eines Mitnahmestiftes 6 angelenkt und wird mit einer am oberen Ende des hakenförmigen Greifer­ fingers 2 angeordneten Druckfeder 7 über Rollen 5 und 10 an eine Greiferaufschlagleiste 4 gedrückt. Die Druckfeder 7 übernimmt hierbei sowohl die Funktion der Greiferaufschlag­kraft als auch die Funktion der Anpreßkraft der Rollen 5, 10 an die Greiferaufschlagleiste 4. Die Rolle 10 stützt sich an einem schrägen Kurventeil 12 an der Greiferaufschlagleiste 4 ab, das nahtlos in ein Geradführung 11 senkrecht zur Halte­fläche 13 der Greiferaufschlagleiste 4 übergeht. Im Ruhebe­reich bei geschlossenem Greifer stützen sich beide Rollen 5, 10 spielfrei am Geradführung 11 ab, so daß während des Öffnungs- und Schließvorganges ein Schieben der Greiferspitze 9 vermieden wird, unabhängig davon, ob eine weiche Greifer­auflage vorhanden ist. Beim Drehen der Greiferwelle 3 bewegt sich der hakenförmige Greiferfinger 2 zunächst senkrecht zur Haltefläche 13 des Greiferaufschlagleiste 4 durch den Mitnahmestift 6 nach oben. Erreicht die obere Rolle 10 den schrägen Kurventeil 12 an der Greiferaufschlagleiste 4, be­ginnt das Abschwenken des Greifers, um vor der Papierkante ein- bzw. wegtauchen zu können. Nach dem Umkehrpunkt der Greiferwelle 3 läuft die gleiche Funktion bis zum Schließen des Greifers ab, ohne daß sich Schwingungen in Bogenlaufrichtung auswirken können. Eine Feineinstellung der Greiferspitze 9 zur Haltefläche 13 der Greiferaufschlagleiste 4 ist nicht erforderlich, z.B. auf unterschiedliche Greifflä­chen am Bogenrand oder Bogenstärken.In Fig. 1 the linear movement of a hook-shaped gripper finger 2 is shown schematically in all its phases of movement. The hook-shaped gripper finger 2 is articulated in the clamping piece 1, 14 with its lower end by means of a driving pin 6 and is connected to one at the upper end of the hook-shaped gripper fingers 2 arranged compression spring 7 pressed over rollers 5 and 10 to a gripper bar 4. The compression spring 7 assumes both the function of the gripper impact force and the function of the contact pressure of the rollers 5, 10 on the gripper impact bar 4. The roller 10 is supported on an oblique curve part 12 on the gripper impact bar 4, which is seamless in a straight guide 11 perpendicular to Holding surface 13 of the gripper bar 4 passes. In the rest area with the gripper closed, both rollers 5, 10 are supported without play on the straight guide 11, so that pushing of the gripper tip 9 is avoided during the opening and closing process, regardless of whether a soft gripper pad is present. When the gripper shaft 3 is rotated, the hook-shaped gripper finger 2 first moves perpendicularly to the holding surface 13 of the gripper bar 4 by the driving pin 6 upwards. When the upper roller 10 reaches the inclined curve part 12 on the gripper bar 4, the swiveling of the gripper begins in order to be able to dive in or away from the paper edge. After the reversal point of the gripper shaft 3, the same function continues until the gripper closes without any vibrations having an effect in the direction of sheet travel. A fine adjustment of the gripper tip 9 to the holding surface 13 of the gripper bar 4 is not necessary, for example on different gripping surfaces at the edge of the sheet or sheet thickness.

Der in den Figuren 2 und 3 dargestellte Klemmgreifer weist eine zusätzliche Feder 8 auf, die zwischen dem Klemmstück 1 und dem unteren Ende des hakenförmigen Greiferfingers 2 an­geordnet ist und deren Wirkungslinie auf einer Geraden liegt, die durch den Mittelpunkt der Greiferwelle 3, des Mitnahme­stiftes 6 und der Rolle 5 am unteren Ende des hakenförmigen Greiferfingers 2 verläuft. Durch diese zweite Feder 8 läßt sich der Einfluß der Lagerkraft am Mitnahmestift 6 kompensie­ ren. Für die Funktion des Klemmgreifers ist sie aber nicht zwingend erforderlich.The clamping gripper shown in Figures 2 and 3 has an additional spring 8, which is arranged between the clamping piece 1 and the lower end of the hook-shaped gripper finger 2 and whose line of action lies on a straight line through the center of the gripper shaft 3, the driving pin 6 and the roller 5 runs at the lower end of the hook-shaped gripper finger 2. By this second spring 8, the influence of the bearing force on the driving pin 6 can be compensated Ren. It is not absolutely necessary for the function of the clamp gripper.

Da sich Schwingungen nur noch senkrecht zur Bogenlaufrichtung auswirken können, ist der Klemmgreifer besonders geeignet für Paarungen von Halteflächen am Bogengreiferaufschlag 4 und an der Greiferspitze 9, welche aus sehr hartem strukturierten Werkstoff bestehen. Ein Verschleiß dieser Halteflächen durch das schleifende Papier kann nicht mehr erfolgen, so daß deren formschlüssiges Halten ohne Verschleiß über eine längere Lebensdauer erfolgt. Da keinerlei Einstellungen erforderlich sind, ist der Klemmgreifer außerdem servicefreundlich. Da der hakenförmige Greiferfinger 2 am Klemmstück 1 und nicht an der Greiferwelle abgefedert gelagert ist und spielfrei kurvenge­steuert wird, weist er nur eine geringe Neigung zur Instand­haltung auf, da an den sich drehenden Teilen, den Rollen 5 und 10 und den Lagerstellen am Greiferfinger 2 bzw. den Führungsflächen am Greiferaufschlagleiste 4 kaum Verschleiß auftritt.Since vibrations can only have an effect perpendicular to the direction of sheet travel, the clamping gripper is particularly suitable for pairings of holding surfaces on the sheet gripper pad 4 and on the gripper tip 9, which are made of very hard structured material. A wear of these holding surfaces by the abrasive paper can no longer take place, so that their positive locking takes place without wear over a longer service life. Since no settings are required, the clamp gripper is also easy to service. Since the hook - shaped gripper finger 2 is spring loaded on the clamping piece 1 and not on the gripper shaft and is cam - controlled without play, it has only a low tendency to maintenance, since on the rotating parts, the rollers 5 and 10 and the bearing points on the gripper finger 2 or hardly any wear occurs on the guide surfaces on the gripper bar 4.

BezugszeichenlisteReference symbol list

  • 1 Klemmstück1 clamp
  • 2 Greiferfinger2 gripper fingers
  • 3 Greiferwelle3 gripper shaft
  • 4 Greiferaufschlagleiste4 gripper bar
  • 5 Rolle5 roll
  • 6 Mitnahmestift6 drive pin
  • 7 Druckfeder7 compression spring
  • 8 Feder8 spring
  • 9 Greiferspitze9 gripper tip
  • 10 Rolle10 roll
  • 11 Geradführung11 Straight guidance
  • 12 Kurventeil12 curve part
  • 13 Haltefläche13 holding surface
  • 14 Klemmstück14 clamping piece

Claims (3)

1.) Klemmgreifer für Bogenrotationsdruckmaschinen, der aus einem auf der Greiferwelle befestigten Klemmstück be­steht, an dem ein hakenförmiger Greiferfinger mit seinem unteren Ende angelenkt ist und dessen Greiferspitze in einer Führung an einer Zylinderwand senkrecht zur Grei­ferauflage beweglich ist,
dadurch gekennzeichnet, daß am Greiferfinger (2) an beiden Enden Stützrollen (5, 10) angeordnet sind, die über eine im Klemmstück (1) abgestütze Feder (7) an eine Kurve an der Greiferauf­schlagleiste (4) andrückbar sind, welche ein Kurventeil (12) zur Rollenabstützung des geöffneten Greiferfingers (2) aufweist, das in eine zur Haltefläche (13) der Grei­feraufschlagleiste (4) senkrechte Geradführung (11) über­geht.1.) Clamping gripper for sheet-fed rotary printing presses, which consists of a clamping piece attached to the gripper shaft, to which a hook-shaped gripper finger is articulated with its lower end and whose gripper tip is movable in a guide on a cylinder wall perpendicular to the gripper support,
characterized in that support rollers (5, 10) are arranged on the gripper fingers (2) at both ends, which can be pressed against a curve on the gripper bar (4) via a spring (7) supported in the clamping piece (1) and which forms a curve part ( 12) for supporting the roller of the open gripper finger (2), which merges into a straight guide (11) perpendicular to the holding surface (13) of the gripper bar (4). 2.) Klemmgreifer nach Anspruch 1,
dadurch gekennzeichnet, daß die Kraftwirkungslinie der Feder (7) annähernd pa­rallel zum schrägen Kurventeil (12) der Greiferaufschlag­leiste (4) verläuft und die Vorspannung der Feder (7) einstellbar ist.2.) clamp gripper according to claim 1,
characterized in that the force line of action of the spring (7) runs approximately parallel to the oblique curve part (12) of the gripper bar (4) and the pretension of the spring (7) is adjustable. 3.) Klemmgreifer nach Anspruch 1 und 2,
dadurch gekennzeichnet, daß zwischen dem Klemmstück (1) und dem Greiferfinger (2) eine zweite Feder (8) angeordnet ist, deren Kraftwirkung auf einer Geraden verläuft, die durch die Mittelpunkte von Greiferwelle (3), Greiferfingergelenk (6) und der am unteren Ende des Greiferfingers (2) angeordneten Rolle (5) verläuft.3.) clamp gripper according to claim 1 and 2,
characterized in that a second spring (8) is arranged between the clamping piece (1) and the gripper finger (2), the force effect of which runs on a straight line passing through the centers of the gripper shaft (3), gripper finger joint (6) and the one at the bottom End of the gripper finger (2) arranged roller (5) runs.
EP87112207A 1986-09-26 1987-08-22 Clamping gripper for sheet-fed rotary presses Expired - Lifetime EP0261412B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87112207T ATE74064T1 (en) 1986-09-26 1987-08-22 CLAMPING GRIPPER FOR SHEET ROTARY PRINTING MACHINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863632769 DE3632769A1 (en) 1986-09-26 1986-09-26 CLAMP GRIPPER FOR ARC ROTATION PRINTING MACHINES
DE3632769 1986-09-26

Publications (3)

Publication Number Publication Date
EP0261412A2 true EP0261412A2 (en) 1988-03-30
EP0261412A3 EP0261412A3 (en) 1990-01-31
EP0261412B1 EP0261412B1 (en) 1992-03-25

Family

ID=6310436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112207A Expired - Lifetime EP0261412B1 (en) 1986-09-26 1987-08-22 Clamping gripper for sheet-fed rotary presses

Country Status (5)

Country Link
US (1) US4813353A (en)
EP (1) EP0261412B1 (en)
JP (1) JPS6394846A (en)
AT (1) ATE74064T1 (en)
DE (2) DE3632769A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402615A2 (en) * 1989-06-10 1990-12-19 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Sheet gripper for sheet working machines
DE4214191A1 (en) * 1992-04-30 1993-11-04 Roland Man Druckmasch Gripper for sheet printing press - has rollers at end of gripper fingers in contact with branched curved segment of shaft which compensates for excess pressure on gripper
FR2744708A1 (en) * 1996-02-09 1997-08-14 Heidelberg Harris Sa MOVABLE STROKE DISPOSABLE ON CYLINDERS OF PRINTING ROTARY MACHINES ON WHICH THE PRODUCTS PASS

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR910008218B1 (en) * 1989-11-30 1991-10-12 삼성전자 주식회사 Colour printer
DE4026237C1 (en) * 1990-08-18 1992-02-06 Man Miller Druckmaschinen Gmbh, 6222 Geisenheim, De
DE4317429C2 (en) * 1993-05-26 2001-06-13 Heidelberger Druckmasch Ag Device for non-rotatably adjustable fastening of a gripper stop in the phase angle
DE19613963C2 (en) * 1996-04-09 1999-03-04 Heidelberger Druckmasch Ag Device for detaching a sheet from a blanket cylinder of a printing machine
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
DE10335230A1 (en) * 2003-08-01 2005-02-17 Man Roland Druckmaschinen Ag Process for the production of RFID labels
CN102555439A (en) * 2012-01-12 2012-07-11 天津长荣印刷设备股份有限公司 Gripper bar device with rollers and operating method of gripper bar device with rollers
JP5880146B2 (en) * 2012-03-05 2016-03-08 富士ゼロックス株式会社 Transfer device, image forming device

Citations (3)

* 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
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

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD67992A (en) *
DE67992C (en) * R. RÖDER in Heidelberg, Kl. Mantelgasse 1 Adjustable angle measure
DD66634A (en) *
DE66634C (en) * A. ALBISSER in Obersulz, Elsafs Machine for grinding card cover fittings
DE974955C (en) * 1951-08-09 1961-06-15 Gerhard Ritzerfeld Device for clamping printing forms in rotary multipliers
DE1908181A1 (en) * 1969-02-19 1970-11-05 Roland Offsetmaschf Clamp gripper for sheet-fed rotary printing machines
US3637202A (en) * 1970-05-14 1972-01-25 Miller Printing Machinery Co Sheet-gripping device
SU765024A1 (en) * 1975-05-08 1980-09-23 Специальное Конструкторское Бюро Пишущих Машин "Союзоргтехника" Министерства Приборостроения, Средств Автоматизации И Систем Управления Device for securing flexible printing plates on plate cylinder
DD148619A1 (en) * 1980-01-21 1981-06-03 Guenter Weisbach DEVICE FOR CONTROLLING DRAWING MARKS IN PRINTING MACHINES
DE3049067C2 (en) * 1980-12-24 1982-12-16 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Gripping device on the impression cylinder for sheet-fed rotogravure printing machines
DE3112964A1 (en) * 1981-04-01 1982-10-21 Heidelberger Druckmaschinen Ag, 6900 Heidelberg "BOW TRANSFER CYLINDER OF ARC ROTATION PRINTING MACHINES WITH A DEVICE FOR FIXING THE PRINTERS"
JPS5814191A (en) * 1981-07-17 1983-01-26 ヤマハ株式会社 Modulation effect apparatus
DE3333050A1 (en) * 1983-09-14 1985-03-28 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach PRE-GRIP DRIVE
DD223118A1 (en) * 1983-12-12 1985-06-05 Polygraph Leipzig BOGENFUEHRUNGSEINRICHTUNG
DE3445886A1 (en) * 1984-12-15 1986-06-26 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach GRIPPER DEVICE FOR A PRINTING MACHINE
DE3529639A1 (en) * 1985-08-19 1987-02-26 Roland Man Druckmasch SPRING GRIPPER FOR ARC ROTATION PRINTING MACHINES
JPH116546A (en) * 1997-06-17 1999-01-12 Mitsuboshi Belting Ltd Multishaft driving device adopting v-ribbed belt

Patent Citations (3)

* 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
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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402615A2 (en) * 1989-06-10 1990-12-19 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Sheet gripper for sheet working machines
EP0402615A3 (en) * 1989-06-10 1991-05-29 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Sheet gripper for sheet working machines
DE4214191A1 (en) * 1992-04-30 1993-11-04 Roland Man Druckmasch Gripper for sheet printing press - has rollers at end of gripper fingers in contact with branched curved segment of shaft which compensates for excess pressure on gripper
FR2744708A1 (en) * 1996-02-09 1997-08-14 Heidelberg Harris Sa MOVABLE STROKE DISPOSABLE ON CYLINDERS OF PRINTING ROTARY MACHINES ON WHICH THE PRODUCTS PASS

Also Published As

Publication number Publication date
EP0261412A3 (en) 1990-01-31
ATE74064T1 (en) 1992-04-15
US4813353A (en) 1989-03-21
DE3632769C2 (en) 1988-09-15
DE3632769A1 (en) 1988-04-07
JPS6394846A (en) 1988-04-25
EP0261412B1 (en) 1992-03-25
DE3777733D1 (en) 1992-04-30

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