EP0919378A1 - Sheet guide device in the area of the front gripper system in a printing machine - Google Patents

Sheet guide device in the area of the front gripper system in a printing machine Download PDF

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Publication number
EP0919378A1
EP0919378A1 EP98121722A EP98121722A EP0919378A1 EP 0919378 A1 EP0919378 A1 EP 0919378A1 EP 98121722 A EP98121722 A EP 98121722A EP 98121722 A EP98121722 A EP 98121722A EP 0919378 A1 EP0919378 A1 EP 0919378A1
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EP
European Patent Office
Prior art keywords
gripper
sheet
sheet guiding
guiding device
nozzles
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Granted
Application number
EP98121722A
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German (de)
French (fr)
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EP0919378B1 (en
Inventor
Erich Pietsch
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Manroland AG
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MAN Roland Druckmaschinen AG
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Publication of EP0919378A1 publication Critical patent/EP0919378A1/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
    • B41F21/04—Grippers
    • B41F21/05—In-feed grippers

Definitions

  • the invention relates to a sheet guiding device in the area of gripper systems a printing press according to the preamble of the main claim.
  • a sheet guiding device of this type is known from DE 196 05 420 C1.
  • This device is intended to prevent the underside of the sheet from touching the gripper of the vibratory system, also called the pre-gripper, and to enable trouble-free sheet transfer, regardless of the format width, to a subsequent sheet guiding system, for example a feed drum.
  • the pre-gripper has nozzles arranged between its gripper cuffs, the flow of which is directed towards the front edge of the sheet and can be blown with air. The blown air can flow clocked as well as non-clocked onto the front edge of the sheet, the pressure being adjustable.
  • the nozzles are assigned to the side of the gripper supports and continue to be directed towards the front edge of the sheet in their flow direction.
  • the pressure level of the blown air flow is lower during the forward movement of the pre-gripper from the feed table to the sheet guide system, while the pressure is increased when the pre-gripper moves back from the sheet guide system to the feed table. Since the blowing nozzles are directed at right angles to the underside of the sheet, it is disadvantageous that the blowing nozzles require additional space in addition to the pre-gripper grippers or the pre-gripper supports.
  • this space must be kept free for the grippers of the sheet guiding system, for example a feed drum, when the gripper systems are handed over from the pre-gripper to the sheet guiding system.
  • the blowing nozzles must end at the pre-gripper at a greater distance from the underside of the sheet.
  • the blowing air must be adjustable in its printing energy directed towards the underside of the sheet, since the weight per unit area of the printing material to be processed must be taken into account with regard to the printing energy.
  • a pre-gripper as a vibrating system for sheet-fed rotary machines with grippers and a large number of pre-grippers is out, for example known from DE 44 38 757 C2.
  • the invention has for its object a sheet guiding device of the beginning to create described type that avoids the disadvantages mentioned, the in particular regardless of the basis weight, format and gripper pitch of the processing substrate allows a more uniform sheet guidance and improved sheet transfer allowed.
  • the solution according to the invention is based on a sheet guiding device which in the area of the gripper systems, especially the gripper surcharges, on a pre-gripper and / or sheet guide systems, for example sheet guide cylinders is.
  • the sheet guiding device is at least made of pneumatically actuated, the nozzles assigned to the gripper serves, their flow direction the blowing air escaping parallel to the substrate underside and across whose direction of conveyance is directed.
  • the device according to the invention makes it possible to use a uniform one Guiding and handing over the sheets to be processed from one system Pre-gripper to a first sheet guiding system and from there in the conveying direction subsequent sheet guiding systems, preferably sheet guiding cylinders, to hand over.
  • the pre-gripper and the sheet guiding systems point in the Gripper systems together or individually as well as in groups according to the invention Training characteristics of the institution.
  • the sheet guide is not dependent on the basis weight and / or the bending stiffness of the respective printing material. Pressure regulation dependent on the basis weight and the bending stiffness is also not necessary.
  • a sheet-fed rotary printing press consists, among other things, of a system 14 a sheet 1, which is in the conveying direction 13 from a feed table, e.g. a suction belt table, coming against the leading edges and laterally aligned becomes.
  • the system 14 is integrated flush with the conveyor level and - preferably transversely to the conveying direction 13 - a plurality of blow-suction nozzles which can be acted upon pneumatically 15 arranged.
  • the blow-suction nozzles 15 each have a feed channel 16 coupled, the feed channels 16 with a pneumatic system for the air supply are connected.
  • Each blowing / suction nozzle 15 is integrated in the system 14 an insert element 17 associated with the surface of the system 14 Funding level for the sheet 1 forms.
  • the system 14 is assigned a pre-gripper 6 adjacent as a vibrating system.
  • the Pre-gripper 6 consists of a in the printing press in the machine frame mounted oval hollow cylinder with a web 18.
  • the web 18 is a gripper system assigned by a gripper shaft 7 with a plurality of Grippers 9 and this associated gripper cuffs 2 is formed.
  • the grabs 9 are in a known manner by means of spring force against the gripper arms 2nd guided and by means of gear mechanisms against the spring force of the gripper serves 2 pivoted.
  • the pre-gripper 6 is in the conveying direction 13 a sheet guiding system 10 with at least one corresponding gripper system 9,7,2 subordinate.
  • the sheet guide system 10 is as a feed drum formed as the first sheet guide cylinder, the sheet 1 to a further sheet guide cylinder, preferably an impression cylinder, in hands over to a printing unit. From this sheet guide cylinder, sheet 1 to subsequent sheet guiding cylinders, preferably transfer cylinders and Printing cylinder, handed over for further processing.
  • the gripper cuffs 2 are each pneumatically actuated Nozzle 3 assigned parallel to the underside of the sheet 21 and transversely to the conveying direction 13, a flow direction 8 for blowing air is generated to the Guide sheet 1 on the funding level.
  • each gripper impact 2 has a flow channel 4, which is in functional connection with a blown air supply 5, the Blown air supply lines 5 are coupled to a pneumatic system 19.
  • each has a sheet underside 21, preferably immediately adjacent thereto Gripper impact 2 on at least one end face 22, a nozzle 3, with its Flow direction 8 parallel to the underside of the arc 21 and transversely to the conveying direction 13 is directed to guide the sheet 1 in the conveying plane.
  • the arrangement of the nozzles 3 is integrated into the gripper cuffs 2.
  • the format area 20 is through the side edges for processing upcoming sheets with a minimum format width of 12 and a maximum Format width 11 formed.
  • the blowing air can be applied Nozzles 3 at least in one end face 22 of the gripper cuffs 2 arranged integrated in this, the flow direction 8 at least in Direction side edges of the sheet 1 are directed.
  • the nozzles 3 with flow direction 8 during printing operation can be set to an essentially constant pressure energy.
  • the sheet 1 in the rest position 14 is aligned with the leading edge and the side edge, is then gripped by the pre-gripper 6 by means of grippers 9 and gripper impact 2 on the leading edge of the sheet and transferred to the downstream sheet guiding system 10 by means of a swinging movement.
  • the grippers 9 are arranged at a defined distance from one another on the gripper shaft 7 (gripper pitch).
  • a sheet 1 with a format width arrives for processing within the format area 20, the side areas (including the side edges) of which are not gripped by a gripper 9 with an associated gripper cuff 2, the protruding side areas of the printing material bend, since the side edges in the free space between two grippers 9 end. Since the grippers 9 of the subsequent sheet guiding system 10 are arranged in a gap (in the free space) between the grippers 9 of the pre-gripper 6, there is a risk that the side areas of the sheets 1 will not be gripped, bent and / or torn during the transfer, which in addition to the Damage to the substrate also negatively affects the registration accuracy.
  • the underside of the arc 21 is guided on the air jet in the flow direction 8, floating in the conveying plane.
  • the grippers 9 of the sheet guiding system 10 also grasp the side areas of the sheets 1 in a manner that is appropriate to the pass due to the flatness of the printing material on the leading edge, and possible damage is noticeably reduced or eliminated.
  • the device according to the invention is not limited to the example shown. Rather, the gripper serves 2 can be acted upon pneumatically
  • nozzles 3 also in gripper systems 9, 7, 2 (with Grippers 9, gripper shaft 7 and gripper serves 2) can be used as they are in sheet guiding systems 10 are known.
  • the device according to the invention can also be used in gripper systems 9, 7, 2 interacting in pairs.

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

Abstract

The locating stops (2) for the paper grips which pick up the paper for transfer to the print process are improved by incorporating air jets which provide an air cushion through blowing parallel under the leading edge of the paper (1). This positions the paper in the optimum pick up position irrespective of the weight of the paper. The air feed is selected to either the maximum or minimum format for the paper. The air jets are positioned just under the tips of the stops, and hence just under the feed surface of the paper.

Description

Die Erfindung betrifft eine Bogenführungseinrichtung im Bereich von Greifersystemen einer Druckmaschine nach dem Oberbegriff des Hauptanspruches.The invention relates to a sheet guiding device in the area of gripper systems a printing press according to the preamble of the main claim.

Eine Bogenführungseinrichtung dieser Art ist aus der DE 196 05 420 C1 bekannt. Diese Einrichtung soll eine Berührung der Bogenunterseite mit dem Greifern der Schwinganlage, auch Vorgreifer genannt, vermeiden und eine störungsfreie Bogenübergabe, unabhängig von der Formatbreite, an ein nachfolgendes Bogenführungssystem, z.B. eine Anlegetrommel, ermöglichen. Dazu weist der Vorgreifer zwischen seinen Greiferaufschlägen angeordnete Düsen auf, welche mit ihrer Strömung auf die Vorderkante des Bogens gerichtet sind und mit Blasluft beaufschlagbar sind. Dabei kann die Blasluft getaktet als auch ungetaktet auf die Vorderkante des Bogens strömen, wobei der Druck einstellbar ist.
In einer Weiterbildung sind die Düsen seitlich neben den Greiferauflagen diesen zugeordnet und in ihrer Strömungsrichtung weiterhin auf die Vorderkante des Bogens gerichtet.
Nach einer weiteren Ausbildung ist das Druckniveau der Blasluftströmung während der Vorbewegung des Vorgreifers vom Anlegetisch zum Bogenführungssystem niedriger, während bei Rückbewegung des Vorgreifers vom Bogenführungssystem zum Anlegetisch der Druck erhöht ist. Da die Blasdüsen rechtwinkelig auf die Bogenunterseite gerichtet sind, ist es von Nachteil, daß die Blasdüsen neben den Vorgreifergreifern bzw. den Vorgreiferauflagen zusätzlichen Platz benötigen. Dieser Platz muß aber freigehalten werden für die Greifer des Bogenführungssystems, z.B. einer Anlegetrommel, bei der Bogenübergabe der Greifersysteme vom Vorgreifer an das Bogenführungssystem. Um Kollisionen mit den Greifern des Bogenführungssystem zu vermeiden, müssen deshalb die Blasdüsen bereits in einem größeren Abstand von der Bogenunterseite entfernt am Vorgreifer enden. Weiterhin ist es nachteilig, daß die Blasluft in ihrer auf die Bogenunterseite gerichteten Druckenergie regulierbar sein muß, da hinsichtlich der Druckenergie das Flächengewicht des zu verarbeiteten Bedruckstoffes berücksichtigt werden muß. Schließlich sind bei dieser Ausbildung zusätzlich Strömungsturbulenzen zu beachten, die unter Berücksichtigung des Flächengewichtes durch die Beschleunigungsmomente des Bogens von Null (ruhende Lage auf dem Anlegetisch) auf Maschinengeschwindigkeit des Bogenführungssystems und durch die Schleppströmung bei während der Bogenübergabe an das Bogenführungssystem abgeschalteter Blasluft bedingt sind.A sheet guiding device of this type is known from DE 196 05 420 C1. This device is intended to prevent the underside of the sheet from touching the gripper of the vibratory system, also called the pre-gripper, and to enable trouble-free sheet transfer, regardless of the format width, to a subsequent sheet guiding system, for example a feed drum. For this purpose, the pre-gripper has nozzles arranged between its gripper cuffs, the flow of which is directed towards the front edge of the sheet and can be blown with air. The blown air can flow clocked as well as non-clocked onto the front edge of the sheet, the pressure being adjustable.
In a further development, the nozzles are assigned to the side of the gripper supports and continue to be directed towards the front edge of the sheet in their flow direction.
According to a further embodiment, the pressure level of the blown air flow is lower during the forward movement of the pre-gripper from the feed table to the sheet guide system, while the pressure is increased when the pre-gripper moves back from the sheet guide system to the feed table. Since the blowing nozzles are directed at right angles to the underside of the sheet, it is disadvantageous that the blowing nozzles require additional space in addition to the pre-gripper grippers or the pre-gripper supports. However, this space must be kept free for the grippers of the sheet guiding system, for example a feed drum, when the gripper systems are handed over from the pre-gripper to the sheet guiding system. To avoid collisions with the grippers of the sheet guiding system, the blowing nozzles must end at the pre-gripper at a greater distance from the underside of the sheet. Furthermore, it is disadvantageous that the blowing air must be adjustable in its printing energy directed towards the underside of the sheet, since the weight per unit area of the printing material to be processed must be taken into account with regard to the printing energy. Finally, with this design, additional flow turbulence must be taken into account, which, taking into account the basis weight, is caused by the acceleration moments of the sheet from zero (resting position on the feed table) to the machine speed of the sheet guiding system and by the drag flow with blowing air switched off during the sheet transfer to the sheet guiding system.

Ein Vorgreifer als Schwinganlage für Bogenrotationsmaschinen mit Greifern Greiferaufschlagleisten und einer Vielzahl von Vorgreifergreifern ist beispielsweise aus der DE 44 38 757 C2 bekannt.A pre-gripper as a vibrating system for sheet-fed rotary machines with grippers and a large number of pre-grippers is out, for example known from DE 44 38 757 C2.

Der Erfindung liegt die Aufgabe zugrunde, eine Bogenführungseinrichtung der eingangs beschriebenen Art zu schaffen, die die genannten Nachteile vermeidet, die insbesondere unabhängig vom Flächengewicht, Format und Greiferteilung des zu verarbeitenden Bedruckstoffes eine gleichmäßigere Bogenführung gestattet und eine verbesserte Bogenübergabe erlaubt.The invention has for its object a sheet guiding device of the beginning to create described type that avoids the disadvantages mentioned, the in particular regardless of the basis weight, format and gripper pitch of the processing substrate allows a more uniform sheet guidance and improved sheet transfer allowed.

Gelöst wird die Aufgabe durch die Ausbildungsmerkmale des Hauptanspruches. Weiterbildungen ergeben sich aus den Unteransprüchen.The task is solved by the training features of the main claim. Further training results from the subclaims.

Die erfindungsgemäße Lösung geht von einer Bogenführungseinrichtung aus, die im Bereich der Greifersysteme, speziell der Greiferaufschläge, an einem Vorgreifer und/oder Bogenführungssystemen, beispielsweise Bogenführungszylindern, angeordnet ist. The solution according to the invention is based on a sheet guiding device which in the area of the gripper systems, especially the gripper surcharges, on a pre-gripper and / or sheet guide systems, for example sheet guide cylinders is.

Die Bogenführungseinrichtung ist dabei wenigstens aus pneumatisch beaufschlagbaren, den Greiferaufschlägen zugeordneten Düsen gebildet, deren Strömungsrichtung der austretenden Blasluft parallel zur Bedruckstoffunterseite und quer zu dessen Förderrichtung gerichtet sind.The sheet guiding device is at least made of pneumatically actuated, the nozzles assigned to the gripper serves, their flow direction the blowing air escaping parallel to the substrate underside and across whose direction of conveyance is directed.

Durch die erfindungsgemäße Einrichtung ist es möglich, mittels einer gleichmäßigen Führung und Übergabe die zu verarbeitenden Bogen von einer Anlage mittels Vorgreifer an ein erstes Bogenführungssystem und von diesem an in Förderrichtung nachfolgende Bogenführungssysteme, vorzugsweise Bogenführungszylinder, zu übergeben. Der Vorgreifer sowie die Bogenführungssysteme weisen in den Greifersystemen dabei gemeinsam oder einzeln als auch gruppenweise die erfindungsgemäßen Ausbildungsmerkmale der Einrichtung auf.The device according to the invention makes it possible to use a uniform one Guiding and handing over the sheets to be processed from one system Pre-gripper to a first sheet guiding system and from there in the conveying direction subsequent sheet guiding systems, preferably sheet guiding cylinders, to hand over. The pre-gripper and the sheet guiding systems point in the Gripper systems together or individually as well as in groups according to the invention Training characteristics of the institution.

Dabei ist die Bogenführung nicht vom Flächengewicht und/oder der Biegesteifigkeit des jeweiligen Bedruckstoffes abhängig. Ebenso ist eine vom Flächengewicht, von der Biegesteifigkeit abhängige Druckregulierung nicht erforderlich. Ein einmal auf einen Bedruckstoff eingestellter Druck ist annähernd konstant beizubehalten. Der - bedingt durch das zu verarbeitende Format - zwischen den durch die Greiferteilung festgelegten Greifersystemen freiliegende Bogen wird auf der Blasluftströmung

Figure 00030001
schwimmend" in einer Förderebene geführt. Die Förderebene ist idealer Weise durch die Oberseite der Greiferaufschläge des Vorgreifers und/oder des Bogenführungszylinders bestimmt. Freiliegende Bogenecken werden durch die Blasluftströmung seitlich nach außen (quer zur Förderrichtung) gestreckt und liegen dadurch in der genannten Förderebene.The sheet guide is not dependent on the basis weight and / or the bending stiffness of the respective printing material. Pressure regulation dependent on the basis weight and the bending stiffness is also not necessary. Once a print has been set on a printing material, it must be maintained approximately constant. The - due to the format to be processed - exposed between the gripper systems defined by the gripper system is on the blown air flow
Figure 00030001
floating "in a conveying plane. The conveying plane is ideally determined by the top of the gripper pads of the pre-gripper and / or the sheet guiding cylinder. Exposed arc corners are stretched laterally outwards (transversely to the conveying direction) by the blown air flow and are therefore in the stated conveying plane.

Ein weiterer Vorteil ist darin begründet, daß durch den in der Förderebene transportierten Bogen die Strömungsturbulenzen spürbar reduziert sind.
Schließlich ist durch eine Integration der Blasdüsen in die Greiferaufschläge kein zusätzlicher Platzbedarf im Bereich der Greifersysteme erforderlich. Another advantage is based on the fact that the flow turbulence is noticeably reduced by the arc transported in the conveying plane.
Finally, by integrating the blow nozzles into the gripper surcharges, no additional space is required in the area of the gripper systems.

Die Erfindung soll an einem Ausführungsbeispiel näher erläutert werden. Dabei zeigen schematisch:

Fig. 1
eine Bogenanlage in Seitenansicht,
Fig. 2
einen Vorgreifer in Vorderansicht (entgegen der Förderrichtung),
Fig. 3
eine Detaildarstellung eines Greiferaufschlages.
The invention will be explained in more detail using an exemplary embodiment. The following schematically show:
Fig. 1
a bow system in side view,
Fig. 2
a pre-gripper in front view (against the conveying direction),
Fig. 3
a detailed view of a gripper serve.

Eine Bogenrotationsdruckmaschine besteht unter anderem aus einer Anlage 14 mit einem Bogen 1, der in Förderrichtung 13 von einem Zuführtisch, z.B. einem Saugbändertisch, kommend gegen Vorderkanten transportiert und seitlich ausgerichtet wird. Zur Förderebene sind in die Anlage 14 bündig integriert und - vorzugsweise quer zur Förderrichtung 13 - eine Mehrzahl pneumatisch beaufschlagbarer Blas-Sog-Düsen 15 angeordnet. Die Blas-Sog-Düsen 15 sind mit je einem Zuführkanal 16 gekoppelt, wobei die Zuführkanäle 16 mit einem Pneumatiksystem für die Luftversorgung verbunden sind. Integriert in der Anlage 14 ist jeder Blas-Sog-Düse 15 ein Einsatzelement 17 zugeordnet, welches mit der Oberfläche der Anlage 14 die Förderebene für die Bogen 1 bildet. Aus den Blas-Sog-Düsen 15 strömt bei in Betrieb genommener Druckmaschine Druckluft aus, die an einer Bogenunterseite 21 einen Unterdruck erzeugt und somit jeden zugeführten Bogen 1 glatt auf der Anlage 14 auflegt. In der Anlage 14 ist eine quer zur Förderrichtung 13 verlaufende Vertiefung, vorzugsweise als Nut, angeordnet, in die die über Zuführkanäle 16 mit Luft versorgbaren Blas-Sog-Düsen 15 münden.A sheet-fed rotary printing press consists, among other things, of a system 14 a sheet 1, which is in the conveying direction 13 from a feed table, e.g. a suction belt table, coming against the leading edges and laterally aligned becomes. The system 14 is integrated flush with the conveyor level and - preferably transversely to the conveying direction 13 - a plurality of blow-suction nozzles which can be acted upon pneumatically 15 arranged. The blow-suction nozzles 15 each have a feed channel 16 coupled, the feed channels 16 with a pneumatic system for the air supply are connected. Each blowing / suction nozzle 15 is integrated in the system 14 an insert element 17 associated with the surface of the system 14 Funding level for the sheet 1 forms. Comes from the blowing suction nozzles 15 when in operation taken printing machine from compressed air on a sheet underside 21st generates a vacuum and thus each sheet 1 fed smoothly on the system 14 hangs up. In the system 14 is a transverse to the conveying direction 13 Indentation, preferably as a groove, in which the via channels 16 with Air-available blowing suction nozzles 15 open out.

Der Anlage 14 ist ein Vorgreifer 6 als Schwinganlage benachbart zugeordnet. Der Vorgreifer 6 besteht aus einem in der Druckmaschine im Maschinengestell gelagerten ovalen Hohlzylinder mit einem Steg 18. Dem Steg 18 ist ein Greifersystem zugeordnet, welche durch eine Greiferwelle 7 mit einer Mehrzahl von Greifern 9 und diesen zugeordneten Greiferaufschlägen 2 gebildet ist. Die Greifer 9 werden in bekannter Weise mittels Federkraft gegen die Greiferaufschläge 2 geführt und mittels getriebetechnischer Mechanismen entgegen der Federkraft von den Greiferaufschlägen 2 abgeschwenkt. Dem Vorgreifer 6 ist in Förderrichtung 13 ein Bogenführungssystem 10 mit wenigstens einem entsprechenden Greifersystem 9,7,2 nachgeordnet. Im vorliegenden Beispiel ist das Bogenführungssystem 10 als eine Anlegetrommel als erster Bogenführungszylinder ausgebildet, die den Bogen 1 an einen weiteren Bogenführungszylinder, vorzugsweise einen Druckzylinder, in einem Druckwerk übergibt. Von diesem Bogenführungszylinder wird der Bogen 1 an nachfolgende Bogenführungszylinder, vorzugsweise Transferzylinder und Druckzylinder, zur Weiterverarbeitung übergeben.The system 14 is assigned a pre-gripper 6 adjacent as a vibrating system. Of the Pre-gripper 6 consists of a in the printing press in the machine frame mounted oval hollow cylinder with a web 18. The web 18 is a gripper system assigned by a gripper shaft 7 with a plurality of Grippers 9 and this associated gripper cuffs 2 is formed. The grabs 9 are in a known manner by means of spring force against the gripper arms 2nd guided and by means of gear mechanisms against the spring force of the gripper serves 2 pivoted. The pre-gripper 6 is in the conveying direction 13 a sheet guiding system 10 with at least one corresponding gripper system 9,7,2 subordinate. In the present example, the sheet guide system 10 is as a feed drum formed as the first sheet guide cylinder, the sheet 1 to a further sheet guide cylinder, preferably an impression cylinder, in hands over to a printing unit. From this sheet guide cylinder, sheet 1 to subsequent sheet guiding cylinders, preferably transfer cylinders and Printing cylinder, handed over for further processing.

In einer ersten Ausbildung ist den Greiferaufschlägen 2 je eine pneumatisch beaufschlagbare Düse 3 zugeordnet, die parallel zur Bogenunterseite 21 und quer zur Förderrichtung 13 eine Strömungsrichtung 8 für Blasluft erzeugt, um den Bogen 1 auf der Förderebene zu führen.In a first embodiment, the gripper cuffs 2 are each pneumatically actuated Nozzle 3 assigned parallel to the underside of the sheet 21 and transversely to the conveying direction 13, a flow direction 8 for blowing air is generated to the Guide sheet 1 on the funding level.

In einer weiteren Ausbildung weist jeder Greiferaufschlag 2 einen Strömungskanal 4 auf, der mit je einer Blasluftzuführung 5 in Funktionsverbindung ist, wobei die Blasluftzuführungen 5 mit einem Pneumatiksystem 19 gekoppelt sind. Im Bereich einer Bogenunterseite 21, vorzugsweise unmittelbar dazu benachbart, weist jeder Greiferaufschlag 2 an wenigstens einer Stirnseite 22 eine Düse 3 auf, die mit ihrer Strömungsrichtung 8 parallel zur Bogenunterseite 21 und quer zur Förderrichtung 13 gerichtet ist, um den Bogen 1 in der Förderebene zu führen.In a further embodiment, each gripper impact 2 has a flow channel 4, which is in functional connection with a blown air supply 5, the Blown air supply lines 5 are coupled to a pneumatic system 19. In the area each has a sheet underside 21, preferably immediately adjacent thereto Gripper impact 2 on at least one end face 22, a nozzle 3, with its Flow direction 8 parallel to the underside of the arc 21 and transversely to the conveying direction 13 is directed to guide the sheet 1 in the conveying plane.

Bevorzugt ist dabei ausschließlich im seitlichen Bereich (Formatbereich 20) des Vorgreifers 6 die Anordnung der Düsen 3 in die Greiferaufschläge 2 integriert ausgebildet. Der Formatbereich 20 ist dabei durch die Seitenkanten der zur Verarbeitung anstehenden Bogen mit einer minimalen Formatbreite 12 und einer maximalen Formatbreite 11 gebildet. In diesem Formatbereich 20 sind die mit Blasluft beaufschlagbaren Düsen 3 wenigstens in einer Stirnseite 22 der Greiferaufschläge 2 in diese integriert angeordnet, wobei deren Strömungsrichtung 8 zumindest in Richtung Seitenkanten des Bogens 1 gerichtet sind.It is preferred that only in the lateral area (format area 20) Gripper 6, the arrangement of the nozzles 3 is integrated into the gripper cuffs 2. The format area 20 is through the side edges for processing upcoming sheets with a minimum format width of 12 and a maximum Format width 11 formed. In this format range 20, the blowing air can be applied Nozzles 3 at least in one end face 22 of the gripper cuffs 2 arranged integrated in this, the flow direction 8 at least in Direction side edges of the sheet 1 are directed.

Über das Pneumatiksystem 19 und die Blasluftzuführung 5 sind die Düsen 3 mit Strömungsrichtung 8 bei Druckbetrieb (der Begriff schließt auch bereits den Papierlauf ein) auf eine im wesentlichen konstante Druckenergie einstellbar.
Der auf der Anlage 14 in Ruhelage sich befindliche Bogen 1 ist nach der Vorderkante sowie der Seitenkante ausgerichtet, wird von danach vom Vorgreifer 6 mittels Greifern 9 und Greiferaufschlag 2 an der Bogenvorderkante erfaßt und an das nachgeordnete Bogenführungssystem 10 mittels einer Schwingbewegung übergeben.
Die Greifer 9 sind bekanntlich untereinander in einem definierten Abstand auf der Greiferwelle 7 angeordnet (Greiferteilung). Gelangt nun ein Bogen 1 mit einer Formatbreite innerhalb des Formatbereiches 20 zur Verarbeitung, dessen Seitenbereiche (einschließlich der Seitenkanten) nicht von einem Greifer 9 mit zugeordnetem Greiferaufschlag 2 erfaßt werden, so biegen sich die überstehenden Seitenbereiche des Bedruckstoffes durch, da die Seitenkanten im Freiraum zwischen zwei Greifern 9 enden. Da die Greifer 9 des nachfolgenden Bogenführungssystems 10 auf Lücke (im Freiraum) zwischen den Greifern 9 des Vorgreifers 6 angeordnet sind, besteht bei der Übergabe die Gefahr, daß die Seitenbereiche der Bogen 1 nicht erfaßt, umgeknickt und/oder eingerissen werden, was neben der Beschädigung des Bedruckstoffes auch die Passergenauigkeit negativ beeinflußt. Bei den pneumatisch beaufschlagten Düsen 3 wird die Bogenunterseite 21 auf dem Luftstrahl in Strömungsrichtung 8 schwimmend in der Förderebene plan geführt. Die Greifer 9 des Bogenführungssystems 10 erfassen durch die Planlage des Bedruckstoffes an der Vorderkante auch die Seitenbereiche der Bogen 1 passergerecht und mögliche Beschädigungen werden spürbar reduziert bzw. Ausgeschlossen.Via the pneumatic system 19 and the blown air supply 5, the nozzles 3 with flow direction 8 during printing operation (the term also includes the paper flow) can be set to an essentially constant pressure energy.
The sheet 1 in the rest position 14 is aligned with the leading edge and the side edge, is then gripped by the pre-gripper 6 by means of grippers 9 and gripper impact 2 on the leading edge of the sheet and transferred to the downstream sheet guiding system 10 by means of a swinging movement.
As is known, the grippers 9 are arranged at a defined distance from one another on the gripper shaft 7 (gripper pitch). If a sheet 1 with a format width arrives for processing within the format area 20, the side areas (including the side edges) of which are not gripped by a gripper 9 with an associated gripper cuff 2, the protruding side areas of the printing material bend, since the side edges in the free space between two grippers 9 end. Since the grippers 9 of the subsequent sheet guiding system 10 are arranged in a gap (in the free space) between the grippers 9 of the pre-gripper 6, there is a risk that the side areas of the sheets 1 will not be gripped, bent and / or torn during the transfer, which in addition to the Damage to the substrate also negatively affects the registration accuracy. In the case of the pneumatically actuated nozzles 3, the underside of the arc 21 is guided on the air jet in the flow direction 8, floating in the conveying plane. The grippers 9 of the sheet guiding system 10 also grasp the side areas of the sheets 1 in a manner that is appropriate to the pass due to the flatness of the printing material on the leading edge, and possible damage is noticeably reduced or eliminated.

Die erfindungsgemäße Einrichtung ist nicht auf das aufgezeigte Beispiel beschränkt. Vielmehr sind die Greiferaufschläge 2 mit pneumatisch beaufschlagbaren Düsen 3 neben der Anordnung im Vorgreifer 6 auch in Greifersystemen 9,7,2 (mit Greifern 9, Greiferwelle 7 und Greiferaufschlägen 2) einsetzbar, wie sie in Bogenführungssystemen 10 bekannt sind. Dabei ist die erfindungsgemäße Einrichtung auch in paarweise zusammenwirkenden Greifersystemen 9,7,2 einsetzbar. The device according to the invention is not limited to the example shown. Rather, the gripper serves 2 can be acted upon pneumatically In addition to the arrangement in the pre-gripper 6, nozzles 3 also in gripper systems 9, 7, 2 (with Grippers 9, gripper shaft 7 and gripper serves 2) can be used as they are in sheet guiding systems 10 are known. The device according to the invention can also be used in gripper systems 9, 7, 2 interacting in pairs.

BezugszeichenlisteReference list

11
Bogenbow
22nd
GreiferaufschlagGripper impact
33rd
DüsenNozzles
44th
StrömungskanalFlow channel
55
BlasluftzuführungBlown air supply
66
VorgreiferForerunner
77
GreiferwelleGripper shaft
88th
StrömungsrichtungFlow direction
99
GreiferGripper
1010th
BogenführungssystemBow guide system
1111
maximale Formatbreitemaximum format width
1212th
minimale Formatbreiteminimal format width
1313
FörderrichtungDirection of conveyance
1414
Anlageinvestment
1515
Blas-Sog-DüseBlow-suction nozzle
1616
ZuführkanalFeed channel
1717th
EinsatzelementInsert element
1818th
Stegweb
1919th
PneumatiksystemPneumatic system
2020th
FormatbereichFormat range
2121
BogenunterseiteSheet underside
2222
StirnseiteFace

Claims (9)

Bogenführungseinrichtung im Bereich von Greifersystemen einer Druckmaschine mit einem den auf der Anlage ausgerichteten Bogen mittels aus Greifern und Greiferaufschlag gebildeten Greifersystem erfassenden, auf Maschinengeschwindigkeit beschleunigenden und den Bogen an ein erstes Bogenführungssystem mit einem Greifersystem übergebenden Vorgreifer sowie dem ersten Bogenführungssystem nachgeordneten weitere Greifersysteme aufweisenden Bogenführungssystemen,
dadurch gekennzeichnet,
daß den Greiferaufschlägen (2) pneumatisch beaufschlagbare Düsen (3) zugeordnet sind, deren Strömungsrichtung (8) parallel zur Bogenunterseite (21) und quer zur Förderrichtung (13) gerichtet sind, um den Bogen (1) in einer Förderebene zu führen.Sheet guiding device in the area of gripper systems of a printing press with a sheet guiding system comprising the gripper system formed by the gripper system formed by grippers and gripper impact, accelerating to machine speed and transferring the sheet to a first sheet guiding system with a gripper system, and sheet guiding systems downstream of the first sheet guiding system.
characterized,
that the gripper cuffs (2) are assigned pneumatically actuated nozzles (3), the flow direction (8) of which is directed parallel to the underside of the sheet (21) and transversely to the conveying direction (13) in order to guide the sheet (1) in a conveying plane. Bogenführungseinrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß jeder Greiferaufschlag (2) einen integrierten Strömungskanal (4) aufweist, der mit den parallel zur Bogenunterseite (21) angeordneten Düsen (3) in Funktionsverbindung ist, wobei der Strömungskanal (4) über eine Blasluftzuführung (5) mit einem Pneumatiksystem (19) gekoppelt ist.Sheet guiding device according to claim 1,
characterized,
that each gripper impact (2) has an integrated flow channel (4) which is functionally connected to the nozzles (3) arranged parallel to the underside of the bend (21), the flow channel (4) being connected to a pneumatic system (19) via a blown air supply (5) is coupled. Bogenführungseinrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Greiferaufschläge (2) in einem durch die minimale und maximale Formatbreite (12, 11) begrenzten Formatbereich (20) je einen integrierten Strömungskanal (4) aufweisen, der mit wenigstens einer parallel zur Bogenunterseite angeordneten Düse (3) in Funktionsverbindung ist, wobei jeder Strömungskanal (4) über eine Blasluftzuführung (5) mit einem Pneumatiksystem (19) gekoppelt ist. Sheet guiding device according to claim 1,
characterized,
that the gripper cuffs (2) each have an integrated flow channel (4) in a format area (20) limited by the minimum and maximum format width (12, 11), which is functionally connected to at least one nozzle (3) arranged parallel to the underside of the sheet, whereby each flow channel (4) is coupled to a pneumatic system (19) via a blown air supply (5). Bogenführungseinrichtung nach Anspruch 1 und 2 oder 3,
dadurch gekennzeichnet,
daß die Greiferaufschläge (2) an den Stirnseiten (22) angeordnete Düsen (3) aufweisen, die mit dem Strömungskanal (4) in Funktionsverbindung sind.Sheet guiding device according to claim 1 and 2 or 3,
characterized,
that the gripper cuffs (2) on the end faces (22) have nozzles (3) which are functionally connected to the flow channel (4). Bogenführungseinrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß in Förderrichtung (13) bündig in die Anlage (14) integriert eine Mehrzahl von pneumatisch beaufschlagbaren Blas-Sog-Düsen (15) vor dem Vorgreifer (6) angeordnet sind, um auf der Anlage (14) den Bogen (1) bereits glatt auszurichten.Sheet guiding device according to claim 1,
characterized,
that in the conveying direction (13) flush with the system (14) integrates a plurality of pneumatically pressurized blow-suction nozzles (15) in front of the pre-gripper (6) to already smooth the sheet (1) on the system (14) align. Bogenführungseinrichtung nach Anspruch 5,
dadurch gekennzeichnet,
daß in der Anlage (14) eine quer zur Förderrichtung (13) verlaufende Vertiefung angeordnet ist in die die über Zuführkanäle (16) mit Luft versorgbaren Blas-Sog-Düsen (15) münden.Sheet guiding device according to claim 5,
characterized,
that in the system (14) a transverse to the conveying direction (13) is arranged recess into which the blow-suction nozzles (15) which can be supplied with air via feed channels (16) open. Bogenführungseinrichtung nach Anspruch 1 und/oder 2,
dadurch gekennzeichnet,
daß die Greiferaufschläge (2) mit Düsen (3) im Greifersystem (9,7,2) des Vorgreifers (6) angeordnet sind.Sheet guiding device according to claim 1 and / or 2,
characterized,
that the gripper serves (2) with nozzles (3) in the gripper system (9,7,2) of the pre-gripper (6) are arranged. Bogenführungseinrichtung nach Anspruch 1 und/oder 2,
dadurch gekennzeichnet,
daß die Greiferaufschläge (2) mit Düsen (3) im Greifersystem (9,7,2) der Bogenführungssysteme (10) angeordnet sind.Sheet guiding device according to claim 1 and / or 2,
characterized,
that the gripper serves (2) with nozzles (3) in the gripper system (9,7,2) of the sheet guide systems (10) are arranged. Bogenführungseinrichtung nach Anspruch 8,
dadurch gekennzeichnet,
daß das Bogenführungssystem (10) ein Bogenführungszylinder ist.Sheet guiding device according to claim 8,
characterized,
that the sheet guide system (10) is a sheet guide cylinder.
EP98121722A 1997-11-29 1998-11-14 Sheet guide device in the area of the front gripper system in a printing machine Expired - Lifetime EP0919378B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19753137 1997-11-29
DE19753137A DE19753137C1 (en) 1997-11-29 1997-11-29 Sheet-guide and handler for printing machine

Publications (2)

Publication Number Publication Date
EP0919378A1 true EP0919378A1 (en) 1999-06-02
EP0919378B1 EP0919378B1 (en) 2002-08-21

Family

ID=7850322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121722A Expired - Lifetime EP0919378B1 (en) 1997-11-29 1998-11-14 Sheet guide device in the area of the front gripper system in a printing machine

Country Status (4)

Country Link
EP (1) EP0919378B1 (en)
JP (1) JP2983977B2 (en)
AT (1) ATE222537T1 (en)
DE (2) DE19753137C1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10011186B4 (en) * 2000-03-08 2008-09-04 Koenig & Bauer Aktiengesellschaft Device for guiding bows
WO2005047000A1 (en) * 2003-11-17 2005-05-26 Silverbrook Research Pty Ltd Blower box assembly for a printer
JP2008156123A (en) 2006-12-21 2008-07-10 Heidelberger Druckmas Ag Device for feeding sheet toward machine for processing sheet
DE102007030456B4 (en) 2007-06-29 2009-04-23 Koenig & Bauer Aktiengesellschaft Device for guiding bows

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0490087A1 (en) * 1990-12-10 1992-06-17 Heidelberger Druckmaschinen Aktiengesellschaft Device for smoothing the sheets on the impression cylinder of a sheet-fed rotary printing machine
DE19605420C1 (en) * 1996-02-14 1997-04-10 Kba Planeta Ag Sheet guiding device for printing machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4438757C2 (en) * 1994-10-29 1997-09-11 Roland Man Druckmasch Pre-gripper for sheet-fed rotary printing machines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0490087A1 (en) * 1990-12-10 1992-06-17 Heidelberger Druckmaschinen Aktiengesellschaft Device for smoothing the sheets on the impression cylinder of a sheet-fed rotary printing machine
DE19605420C1 (en) * 1996-02-14 1997-04-10 Kba Planeta Ag Sheet guiding device for printing machine

Also Published As

Publication number Publication date
DE19753137C1 (en) 1998-10-15
DE59805239D1 (en) 2002-09-26
ATE222537T1 (en) 2002-09-15
EP0919378B1 (en) 2002-08-21
JP2983977B2 (en) 1999-11-29
JPH11227159A (en) 1999-08-24

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