EP0709187A1 - Support for a press element which can be pressed into and retracted from a cylinder of a printing machine - Google Patents

Support for a press element which can be pressed into and retracted from a cylinder of a printing machine Download PDF

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Publication number
EP0709187A1
EP0709187A1 EP95116084A EP95116084A EP0709187A1 EP 0709187 A1 EP0709187 A1 EP 0709187A1 EP 95116084 A EP95116084 A EP 95116084A EP 95116084 A EP95116084 A EP 95116084A EP 0709187 A1 EP0709187 A1 EP 0709187A1
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EP
European Patent Office
Prior art keywords
cylinder
pressure roller
lever
piston rod
spring
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
EP95116084A
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German (de)
French (fr)
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EP0709187B1 (en
Inventor
Helmut Schild
Berthold Seib
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Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0709187A1 publication Critical patent/EP0709187A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1206—Feeding to or removing from the forme cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0018—Protection means against injury to the operator

Definitions

  • the invention relates to a suspension for a pressing element that can be turned on and off on a cylinder of a printing press, according to the preamble of claim 1.
  • a device for changing plates which is designed as a pressure roller and is used to pull up a new pressure plate thereon.
  • an actuating element with a spring connected in series acts on both ends of this roller.
  • the spring element is provided for reasons of personal protection, in particular to avoid injuries when a hand gets into the gap between the pressure roller and the plate cylinder when the plate cylinder is rotating and the pressure roller is turned off. Due to the series connection of the actuating element and the spring, it is not possible to set the pressure roller on the plate cylinder with any forces, since the spring constant must be designed to prevent injuries.
  • the bearing of the pressure roller is also assigned a switching element, which detects an evasive movement of the pressure roller in the parked state and then triggers a machine stop.
  • a disadvantage of this known device is that the pressure element designed here as a pressure roller cannot be set against the cylinder with any forces. Especially when mounting new printing plates on the plate cylinder of a printing press however, this is desirable in order in particular to prevent the printing plate from lying hollow at the start of printing.
  • a pressure element designed as a pressure roller and a folding strip in combination is also known, which can be turned on and off from the plate cylinder by means of an associated adjusting means. Since no spring element is provided in this known device, neither the pressure roller nor the folding strip assigned to it can execute an evasive movement away from the plate cylinder when the plate cylinder is in the state. Although the pressure roller and the folding bar can be placed on the plate cylinder with arbitrarily high forces, the additional cost of protection to avoid injuries is to be regarded as disadvantageous here.
  • the object of the present invention is therefore to design a suspension according to the preamble of claim 1 in such a way that the disadvantages described above can be avoided.
  • FIGS. 1 to 3 each show a plate cylinder of a printing press with a pressure roller 2 arranged axially parallel thereto.
  • the pressure roller 2 serves, in a manner known per se, to pull a printing plate (not shown) onto the plate cylinder 1 and is therefore mounted on and detachable from the latter .
  • the pressure roller 2 is mounted on the pivotable ends of a two-armed lever 3, this two-armed lever 3 being mounted on a joint 11 fixed to the frame.
  • a bushing 4 is articulated, which has a central opening 4.1 at its lower end.
  • the piston rod 6 of an adjusting means designed as a working cylinder 7 (pneumatic cylinder) engages.
  • the end of the piston rod 6 which projects through the opening 4.1 into the interior of the bushing 4 is widened to form a head 5, the head 5 having a larger outside diameter than the opening 4.1.
  • the shaft of the piston rod 6 is movable within the opening 4.1 in the manner of a straight guide.
  • the actuating means which is designed as a working cylinder 7, is supported on the lower end of the frame via a joint 10. Between the upper end of the working cylinder 7 and the lower end of the bushing 4, a spring 8 is arranged coaxially to the piston rod 6, which presses the bottom of the bushing 4 (opening 4.1) against the underside of the head 5. The pressure roller 2 is thus held in a basic position parked by the plate cylinder 1 by the spring 8 which is supported on the frame (FIG. 1).
  • a stop in the form of a sleeve 9 is attached below the head 5 at a distance therefrom. If the actuating element designed as a working cylinder 7 is now actuated, an idle stroke is first overcome until the sleeve 9 strikes the underside of the bushing 4, whereupon the bushing 4 is then carried along by the piston rod 6 which extends further and thereby the pressure roller 2 on the plate cylinder 1 is employed. The spring 8 relaxes here.
  • the pressure roller 2 employed on the plate cylinder 1 is shown in FIG. 3.
  • FIGS. 4 to 6 once again show in detail the articulation of the adjusting means designed as a working cylinder 7 on the lever 3.
  • the position of the piston rod 6 of the working cylinder 7 in FIG. 4 corresponds to the position of the pressure roller 2 in FIG. 1.
  • the working cylinder 7 is articulated on its underside by a joint 10 to a frame wall 13.
  • the pressure roller 2 is placed on both frame walls by an adjusting means on the plate cylinder 1.
  • the joint 11 of the lever 3 is formed by a bolt embedded in the frame wall 13.
  • the socket 4 with the opening 4.1 is embedded in a hinge pin 12 of the lever 3.
  • the head 5, which is located inside the socket 4 is screwed with its threaded shaft into a thread of the sleeve forming the stop, which in turn is screwed onto the end of the piston rod 6 with a corresponding thread.
  • the spring 8 is supported on the one hand on the top of the working cylinder 7 (and thus fixed to the frame) and on the other hand on the underside of the bushing 4.
  • Fig. 5 shows the resilient swiveling of the pressure roller 2 from the plate cylinder 1 again, here the head 5 is further immersed in the interior of the bushing 4 and this compresses the spring 8 according to the pivoting path of the lever 3 (see Fig. 2).
  • Fig. 6 the fully extended position of the piston rod 6 of the working cylinder 7 is shown, in which the sleeve 9 forming the stop is pressed against the underside of the bush 4, so that now the pressure roller 2 (not shown here) carrying lever the pressure roller 2 presses on the plate cylinder 1.
  • the working cylinder 7 or the piston rod 6, before the sleeve 9 strikes the bush 4, must first carry out an idle stroke which essentially corresponds to the distance between the head 5 and the upper edge of the sleeve 9. After the upper edge of the sleeve 9 comes into contact with the underside of the bushing 4, when the piston rod 6 is extended further, the lever 3 is pivoted, i.e. the positioning of the pressure roller 2 (not shown) on the plate cylinder 1 as shown in FIG. 3.
  • FIGS. 7 to 10 show another embodiment of the setting-up and setting-down device according to the invention for a pressure element designed as a pressure roller 2.
  • the pressure roller 2 is rotatably supported here with its two ends on a respective pivotable end of a one-armed lever 3.
  • the joint 11 of the lever 3 is formed by a hinge pin 16.
  • a driver 19 is attached to the lever 18, which can be pivoted by the piston rod 6 of the working cylinder 7, and is immersed in the effective area of the stops 20, 21 of the lever 3.
  • a lever arm 14 is integrally connected, which is articulated to the end of a rod 15, which is under the bias of the spring 8, which in turn is supported by a support bearing 17 fixed to the frame.
  • Fig. 7 the pressure roller 2 is in the parked state with respect to the plate cylinder 1.
  • the force of the spring 8 which is transmitted to the lever arm 14 via the rod 15, the surface of the stop 21 is pressed against the associated surface of the driver 19 , which is connected to the lever 18.
  • the piston rod 6 of the working cylinder 7 is in the retracted position, so that the pressure roller 2 is held at a defined distance from the surface of the plate cylinder 1 by the driver 19 connected to the lever 18.
  • the position of the pressure roller 2 according to FIG. 7 corresponds to the parked position of the pressure roller 2 in FIG. 1.
  • Fig. 9 shows the extended position of the piston rod 6 of the working cylinder 7.
  • the driver 19 has been pivoted by an angle corresponding to the stroke of the piston rod 6, so that the pressure roller 2 by the contact of the driver 19 on the surface of the stop 20 is pressed against the surface of the plate cylinder 1.
  • the piston rod 6 of the working cylinder 7 first performed a certain idle stroke, which corresponds to the spacing of the surfaces of the stops 20, 21 on the one hand and the corresponding size of the driver 19 on the other hand. After the driver 19 comes into contact with the stop 20, the lever 3 is pivoted and thus the pressure roller 2 is turned on while the spring 8 is relaxed.
  • Fig. 10 shows the parallel arrangement of the working cylinder 7 next to the rod 15, via which the force of the spring 8 is transmitted to the lever 4 and thus the lever 3, which carries the pressure roller 2, not shown here.
  • the levers 18 and 3 are pivoted independently of one another about a specific pivoting path - due to the size of the driver 19 and the spacing of the stops 20 and 21 - on a joint joint pin 16 which forms the joint 11 and which is attached at its end to the frame wall 13 is.
  • the spring 8 is designed according to the invention in such a way that the weight of the pressure roller 2 or the pressure element, which is formed in any other way, is just being compensated for in the position in which the plate cylinder 1 is in the position. This ensures that even the slightest forces are sufficient to swing the pressure roller 2 resiliently from the plate cylinder 1. This results in a maximum reduction in the risk of injury for an operator.
  • the pressing element can also be designed as a washing device or arranged within one.

Abstract

The suspension mounting allows the pressure roller (2) to be moved towards and away from the surface of the printing cylinder (1) via a setting device, with a bias spring (8) opposing the movement of the pressure roller away from the printing cylinder. The setting device uses an operating cylinder (7), with the bias spring supported coaxial to the cylinder piston rod between the upper end of the cylinder and a ring (4.1) at the end of a sleeve (4) into which the piston rod end projects. A given free stroke of the cylinder is used for releasing the spring.

Description

Die Erfindung betrifft eine Aufhängung für ein an einem Zylinder einer Druckmaschine an- und abstellbares Andrückelement gemäß dem Oberbegriff von Anspruch 1.The invention relates to a suspension for a pressing element that can be turned on and off on a cylinder of a printing press, according to the preamble of claim 1.

Aus der DE 4 218 602 A1 ist eine Vorrichtung für den Plattenwechsel bekannt, welche als Andrückrolle ausgebildet ist und zum Aufziehen einer neuen Druckplatte an diese angestellt wird. Zum An- und Abstellen dieser Andrückrolle wirkt auf beiden Enden dieser Rolle je ein Stellelement mit einer dazu in Reihe geschalteten Feder. Das Federelement ist aus Gründen des Personenschutzes vorgesehen, insbesondere um Verletzungen zu vermeiden, wenn bei sich drehendem Plattenzylinder und abgestellter Andrückrolle eine Hand in den Spalt zwischen Andrückrolle und Plattenzylinder gerät. Durch die Reihenschaltung des Stellelementes und der Feder ist es aber nicht möglich die Andrückrolle mit beliebig großen Kräften an den Plattenzylinder anzustellen, da die Federkonstante entsprechend dem Vermeiden von Verletzungen ausgelegt sein muß. Ferner ist der Lagerung der Andrückrolle noch ein Schaltelement zugeordnet, welche eine Ausweichbewegung der Andrückrolle im abgestellten Zustand erfaßt und daraufhin ein Maschinenstopp auslöst.From DE 4 218 602 A1 a device for changing plates is known, which is designed as a pressure roller and is used to pull up a new pressure plate thereon. To turn this pressure roller on and off, an actuating element with a spring connected in series acts on both ends of this roller. The spring element is provided for reasons of personal protection, in particular to avoid injuries when a hand gets into the gap between the pressure roller and the plate cylinder when the plate cylinder is rotating and the pressure roller is turned off. Due to the series connection of the actuating element and the spring, it is not possible to set the pressure roller on the plate cylinder with any forces, since the spring constant must be designed to prevent injuries. Furthermore, the bearing of the pressure roller is also assigned a switching element, which detects an evasive movement of the pressure roller in the parked state and then triggers a machine stop.

Nachteilig bei dieser bekannten Vorrichtung ist, daß das hier als Andrückrolle ausgebildete Andrückelement nicht mit beliebig hohen Kräften an den Zylinder anstellbar ist. Gerade beim Aufziehen von neuen Druckplatten auf den Plattenzylinder einer Druckmaschine ist dies aber wünschenswert, um insbesondere ein Hohlliegen der Druckplatte am Druckanfang zu vermeiden.A disadvantage of this known device is that the pressure element designed here as a pressure roller cannot be set against the cylinder with any forces. Especially when mounting new printing plates on the plate cylinder of a printing press however, this is desirable in order in particular to prevent the printing plate from lying hollow at the start of printing.

Aus der DE 4 214 207 C1 ist ferner ein als Andrückrolle und Abkantleiste in Kombination ausgebildetes Andrückelement bekannt, welches über ein zugeordnetes Stellmittel an den Plattenzylinder an- und von diesem abstellbar ist. Da bei dieser bekannten Vorrichtung kein Federelement vorgesehen ist, vermag weder die Andrückrolle noch die dieser zugeordnete Abkantleiste im vom Plattenzylinder abgestellten Zustand eine Ausweichbewegung vom Plattenzylinder weg auszuführen. Zwar läßt sich die Andrückrolle sowie die Abkantleiste mit beliebig hohen Kräften an den Plattenzylinder anstellen, der zusätzliche Verschutzungsaufwand zur Vermeidung von Verletzungen ist hier aber als nachteilig anzusehen.From DE 4 214 207 C1 a pressure element designed as a pressure roller and a folding strip in combination is also known, which can be turned on and off from the plate cylinder by means of an associated adjusting means. Since no spring element is provided in this known device, neither the pressure roller nor the folding strip assigned to it can execute an evasive movement away from the plate cylinder when the plate cylinder is in the state. Although the pressure roller and the folding bar can be placed on the plate cylinder with arbitrarily high forces, the additional cost of protection to avoid injuries is to be regarded as disadvantageous here.

Aufgabe der vorliegenden Erfindung ist es daher, eine Aufhängung gemäß dem Oberbegriff von Anspruch 1 derartig auszubilden, so daß die oben dargestellten Nachteile vermieden werden können.The object of the present invention is therefore to design a suspension according to the preamble of claim 1 in such a way that the disadvantages described above can be avoided.

Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale von Anspruch 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.

Des weiteren erfolgt die Erläuterung von Ausführungsbeispielen mit der Erfindung anhand der Zeichnung.Furthermore, exemplary embodiments are explained with the invention on the basis of the drawing.

Es zeigen:

Fig. 1 bis 3
die prinzipielle Aufhängung gemäß Erfindung anhand einer an den Plattenzylinder einer Bogenoffsetdruckmaschine an- und abstellbaren Andrückrolle,
Fig. 4 bis 6
eine konstruktive Ausbildung der Erfindung,
Fig. 7 bis 9
eine weitere erfindungsgemäße Ausbildung, und
Fig. 10
die Anordnung von Feder und Stellmittel gemäß den Ausbildungen nach Fig. 7 bis 9.
Show it:
1 to 3
the basic suspension according to the invention on the basis of a pressure roller which can be set on and off the plate cylinder of a sheetfed offset printing machine,
4 to 6
a constructive development of the invention,
7 to 9
a further training according to the invention, and
Fig. 10
the arrangement of spring and actuating means according to the training according to FIGS. 7 to 9.

Die Figuren 1 bis 3 zeigen jeweils einen Plattenzylinder einer Druckmaschine mit einer dazu achsparallel angeordneten Andrückrolle 2. Die Andrückrolle 2 dient in an sich bekannter Weise dem Aufziehen einer nicht dargestellten Druckplatte auf den Plattenzylinder 1 und ist dazu an diesen an- und von diesem abstellbar gelagert.FIGS. 1 to 3 each show a plate cylinder of a printing press with a pressure roller 2 arranged axially parallel thereto. The pressure roller 2 serves, in a manner known per se, to pull a printing plate (not shown) onto the plate cylinder 1 and is therefore mounted on and detachable from the latter .

An beiden Enden ist die Andrückrolle 2 jeweils an den schwenkbaren Enden eines zweiarmigen Hebels 3 gelagert, wobei dieser zweiarmige Hebel 3 an einem gestellfesten Gelenk 11 gelagert ist. An dem zweiten Ende des doppelarmigen Hebels 3 ist das Ende einer Buchse 4 angelenkt, welche an ihrem unteren Ende eine mittige Öffnung 4.1 aufweist. Durch diese Öffnung 4.1 greift die Kolbenstange 6 eines als Arbeitszylinders 7 (Pneumatikzylinder) ausgebildeten Stellmittels. Das durch die Öffnung 4.1 in den Innenraum der Buchse 4 ragende Ende der Kolbenstange 6 ist zu einem Kopf 5 aufgeweitet, wobei der Kopf 5 einen größeren Außendurchmesser hat als die Öffnung 4.1. Der Schaft der Kolbenstange 6 ist innerhalb der Öffnung 4.1 nach Art einer Geradführung beweglich.At both ends, the pressure roller 2 is mounted on the pivotable ends of a two-armed lever 3, this two-armed lever 3 being mounted on a joint 11 fixed to the frame. At the second end of the double-armed lever 3, the end of a bushing 4 is articulated, which has a central opening 4.1 at its lower end. Through this opening 4.1, the piston rod 6 of an adjusting means designed as a working cylinder 7 (pneumatic cylinder) engages. The end of the piston rod 6 which projects through the opening 4.1 into the interior of the bushing 4 is widened to form a head 5, the head 5 having a larger outside diameter than the opening 4.1. The shaft of the piston rod 6 is movable within the opening 4.1 in the manner of a straight guide.

Das als Arbeitszylinder 7 ausgebildete Stellmittel ist an seinem unteren Ende über ein Gelenk 10 gestellfest abgestützt. Zwischen dem oberen Ende des Arbeitszylinders 7 und dem unteren Ende der Buchse 4 ist koaxial zur Kolbenstange 6 eine Feder 8 angeordnet, welche den Boden der Buchse 4 (Öffnung 4.1) gegen die Unterseite des Kopfes 5 drückt. Durch die gestellfest abgestützte Feder 8 wird somit die Andrückrolle 2 in einer vom Plattenzylinder 1 abgestellten Grundstellung gehalten (Fig. 1).The actuating means, which is designed as a working cylinder 7, is supported on the lower end of the frame via a joint 10. Between the upper end of the working cylinder 7 and the lower end of the bushing 4, a spring 8 is arranged coaxially to the piston rod 6, which presses the bottom of the bushing 4 (opening 4.1) against the underside of the head 5. The pressure roller 2 is thus held in a basic position parked by the plate cylinder 1 by the spring 8 which is supported on the frame (FIG. 1).

Verbleibt das als Arbeitszylinder 7 ausgebildete Stellelement in seiner Grundstellung, bei welcher die Andrückrolle 2 vom Plattenzylinder 1 abgestellt ist, so kann die Andrückrolle 2 federnd vom Plattenzylinder 1 weggeschwenkt werden, wobei die Feder 8 komprimiert wird und der Kopf 5 der Kolbenstange 6 vom Boden der Buchse 4 abhebt. Der Kopf 5 der Kolbenstange 6 taucht somit weiter in den Innenraum der Buchse 4 ein. Diese vom Plattenzylinder 1 weggeschwenkte Position der Andrückrolle 2 ist in Fig. 2 dargestellt. Das Abschwenken der Andrückrolle 2 vom Plattenzylinder 1 wird über den Hebel 3 auf einen Schalthebel 22 übertragen, der mit einem Schalter 23 zusammenwirkt, woraufhin Maschinenstopp ausgelöst wird. Am Schaft der Kolbenstange 6 ist unterhalb des Kopfes 5 von diesem beabstandet ein Anschlag in Form einer Muffe 9 angebracht. Wird nun das als Arbeitszylinder 7 ausgebildete Stellelement betätigt, so wird zunächst ein Leerhub überwunden, bis die Muffe 9 an die Unterseite der Buchse 4 anschlägt, woraufhin dann die Buchse 4 durch die weiter ausfahrende Kolbenstange 6 mitgenommen und dadurch die Andrückrolle 2 an den Plattenzylinder 1 angestellt wird. Die Feder 8 entspannt sich hierbei. Die an dem Plattenzylinder 1 angestellte Andrückrolle 2 ist in Fig. 3 dargestellt.Remains the actuator formed as a working cylinder 7 in its basic position, in which the pressure roller 2 is switched off from the plate cylinder 1, the pressure roller 2 can be pivoted away from the plate cylinder 1, whereby the spring 8 is compressed and the head 5 of the piston rod 6 from the bottom of the Jack 4 lifts off. The head 5 of the piston rod 6 thus plunges further into the interior of the socket 4. This position of the pressure roller 2 pivoted away from the plate cylinder 1 is shown in FIG. 2. The pivoting of the pressure roller 2 from the plate cylinder 1 is transmitted via the lever 3 to a shift lever 22 which cooperates with a switch 23, whereupon machine stop is triggered. On the shaft of the piston rod 6, a stop in the form of a sleeve 9 is attached below the head 5 at a distance therefrom. If the actuating element designed as a working cylinder 7 is now actuated, an idle stroke is first overcome until the sleeve 9 strikes the underside of the bushing 4, whereupon the bushing 4 is then carried along by the piston rod 6 which extends further and thereby the pressure roller 2 on the plate cylinder 1 is employed. The spring 8 relaxes here. The pressure roller 2 employed on the plate cylinder 1 is shown in FIG. 3.

Die Figuren 4 bis 6 zeigen noch einmal detailliert die Anlenkung des als Arbeitszylinder 7 ausgebildeten Stellmittels an den Hebel 3. Die Stellung der Kolbenstange 6 des Arbeitszylinders 7 in Fig. 4 entspricht dabei der Stellung der Andrückrolle 2 in Fig. 1. Der Arbeitszylinder 7 ist an seiner Unterseite durch ein Gelenk 10 an einer Gestellwand 13 angelenkt. Die Andrückrolle 2 wird dabei an beiden Gestellwänden durch jeweils ein Stellmittel an dem Plattenzylinder 1 angestellt.FIGS. 4 to 6 once again show in detail the articulation of the adjusting means designed as a working cylinder 7 on the lever 3. The position of the piston rod 6 of the working cylinder 7 in FIG. 4 corresponds to the position of the pressure roller 2 in FIG. 1. The working cylinder 7 is articulated on its underside by a joint 10 to a frame wall 13. The pressure roller 2 is placed on both frame walls by an adjusting means on the plate cylinder 1.

Gemäß den Figuren 4 bis 6 ist das Gelenk 11 des Hebels 3 durch einen in der Gestellwand 13 eingelassenen Bolzen gebildet. Die Buchse 4 mit der Öffnung 4.1 ist dabei in einen Gelenkbolzen 12 des Hebels 3 eingelassen. Der Kopf 5, der sich im Inneren der Buchse 4 befindet, ist mit seinem Gewindeschaft in ein Gewinde der den Anschlag bildenden Muffe eingedreht, welche ihrerseits mit einem entsprechenden Gewinde auf das Ende der Kolbenstange 6 aufgeschraubt ist. Die Feder 8 stützt sich einerseits auf der Oberseite des Arbeitszylinders 7 ab (und somit gestellfest) und andererseits an der Unterseite der Buchse 4.According to FIGS. 4 to 6, the joint 11 of the lever 3 is formed by a bolt embedded in the frame wall 13. The socket 4 with the opening 4.1 is embedded in a hinge pin 12 of the lever 3. The head 5, which is located inside the socket 4 is screwed with its threaded shaft into a thread of the sleeve forming the stop, which in turn is screwed onto the end of the piston rod 6 with a corresponding thread. The spring 8 is supported on the one hand on the top of the working cylinder 7 (and thus fixed to the frame) and on the other hand on the underside of the bushing 4.

Fig. 5 gibt die federnde Abschwenkung der Andrückrolle 2 vom Plattenzylinder 1 wieder, wobei hier der Kopf 5 weiter in den Innenraum der Buchse 4 eintaucht und diese die Feder 8 entsprechend dem Schwenkweg des Hebels 3 zusammendrückt (Vergleiche hierzu Fig. 2).Fig. 5 shows the resilient swiveling of the pressure roller 2 from the plate cylinder 1 again, here the head 5 is further immersed in the interior of the bushing 4 and this compresses the spring 8 according to the pivoting path of the lever 3 (see Fig. 2).

In Fig. 6 ist die vollständig ausgefahrene Position der Kolbenstange 6 des Arbeitszylinders 7 dargestellt, bei der die den Anschlag bildende Muffe 9 gegen die Unterseite der Buchse 4 gedrückt ist, so daß nun der die Andrückrolle 2 (hier nicht dargestellt) tragende Hebel die Andrückrolle 2 an den Plattenzylinder 1 andrückt. Der Arbeitszylinder 7 bzw. die Kolbenstange 6 hat dabei, bevor die Muffe 9 an der Buchse 4 angeschlagen ist, zunächst einen Leerhub auszuführen, der im wesentlichen dem Abstand des Kopfes 5 zu der Oberkante der Muffe 9 entspricht. Nachdem die Oberkante der Muffe 9 in Anlage mit der Unterseite der Buchse 4 gekommen ist, erfolgt bei weiterem Ausfahren der Kolbenstange 6 das Verschwenken des Hebels 3, d.h. das Anstellen der Andrückrolle 2 (nicht dargestellt) an den Plattenzylinder 1 gemäß der Darstellung in Fig. 3.In Fig. 6 the fully extended position of the piston rod 6 of the working cylinder 7 is shown, in which the sleeve 9 forming the stop is pressed against the underside of the bush 4, so that now the pressure roller 2 (not shown here) carrying lever the pressure roller 2 presses on the plate cylinder 1. The working cylinder 7 or the piston rod 6, before the sleeve 9 strikes the bush 4, must first carry out an idle stroke which essentially corresponds to the distance between the head 5 and the upper edge of the sleeve 9. After the upper edge of the sleeve 9 comes into contact with the underside of the bushing 4, when the piston rod 6 is extended further, the lever 3 is pivoted, i.e. the positioning of the pressure roller 2 (not shown) on the plate cylinder 1 as shown in FIG. 3.

Die Figuren 7 bis 10 zeigen eine andere Ausgestaltung der erfindungsgemäßen An- und Abstellvorrichtung für ein als Andrückrolle 2 ausgebildetes Andrückelement. Die Andrückrolle 2 ist hier mit ihren beiden Enden an je einem schwenkbaren Ende eines einarmigen Hebels 3 drehbar gelagert. Das Gelenk 11 des Hebels 3 ist dabei durch einen Gelenkbolzen 16 gebildet. Auf dem Schaft dieses Gelenkbolzens 16 ist neben dem Hebel 3 ein weiterer Hebel 18 schwenkbar gelagert, an dessem schwenkbaren Ende die Kolbenstange 6 eines Arbeitszylinders 7 angelenkt ist, der über ein Gelenk 10 gestellfest abgestützt ist.FIGS. 7 to 10 show another embodiment of the setting-up and setting-down device according to the invention for a pressure element designed as a pressure roller 2. The pressure roller 2 is rotatably supported here with its two ends on a respective pivotable end of a one-armed lever 3. The joint 11 of the lever 3 is formed by a hinge pin 16. On the shaft of this hinge pin 16 there is another lever 18 in addition to the lever 3 pivotably mounted, at the pivotable end of which the piston rod 6 of a working cylinder 7 is articulated, which is supported on the frame via a joint 10.

Mit dem die Andrückrolle 2 tragenden Hebel 3 sind zwei klauenförmig ausgebildete Anschläge 20, 21 fest verbunden. Ferner ist am Hebel 18, der durch die Kolbenstange 6 des Arbeitszylinders 7 verschwenkbar ist, ein Mitnehmer 19 angebracht, der in den Wirkbereich der Anschläge 20, 21 des Hebels 3 eintaucht. An dem Anschlag 21 des Hebels 3 ist ferner noch ein Hebelarm 14 angeformt, der gelenkig mit dem Ende einer Stange 15 verbunden ist, welche unter der Vorspannung der Feder 8 steht, die sich ihrerseits über ein Stützlager 17 gestellfest abstützt.With the lever 3 carrying the pressure roller 2, two claw-shaped stops 20, 21 are firmly connected. Furthermore, a driver 19 is attached to the lever 18, which can be pivoted by the piston rod 6 of the working cylinder 7, and is immersed in the effective area of the stops 20, 21 of the lever 3. On the stop 21 of the lever 3 is also a lever arm 14 is integrally connected, which is articulated to the end of a rod 15, which is under the bias of the spring 8, which in turn is supported by a support bearing 17 fixed to the frame.

In Fig. 7 befindet sich die Andrückrolle 2 im abgestellten Zustand bezüglich dem Plattenzylinder 1. Durch die Kraft der Feder 8, welche über die Stange 15 auf den Hebelarm 14 übertragen wird, wird die Fläche des Anschlages 21 gegen die zugehörige Fläche des Mitnehmers 19 gedrückt, welcher mit dem Hebel 18 verbunden ist. Die Kolbenstange 6 des Arbeitszylinders 7 befindet sich in der eingefahrenen Position, so daß durch den mit dem Hebel 18 verbundenen Mitnehmer 19 die Andrückrolle 2 über den Hebel 3 in einem definierten Abstand zur Oberfläche des Plattenzylinders 1 gehalten wird. Die Stellung der Andrückrolle 2 gemäß Fig. 7 entspricht dabei der abgestellten Position der Andrückrolle 2 in Fig. 1.In Fig. 7, the pressure roller 2 is in the parked state with respect to the plate cylinder 1. By the force of the spring 8, which is transmitted to the lever arm 14 via the rod 15, the surface of the stop 21 is pressed against the associated surface of the driver 19 , which is connected to the lever 18. The piston rod 6 of the working cylinder 7 is in the retracted position, so that the pressure roller 2 is held at a defined distance from the surface of the plate cylinder 1 by the driver 19 connected to the lever 18. The position of the pressure roller 2 according to FIG. 7 corresponds to the parked position of the pressure roller 2 in FIG. 1.

Bei eingefahrener Kolbenstange 6 kann durch die Beabstandung der Flächen der Anschläge 20 und 21 die Andrückrolle 2 entgegen der Kraft der Feder 8 um einen bestimmten Winkel vom Plattenzylinder 1 weggeschwenkt werden. Diese abgeschwenkte Position der Andrückrolle 2 ist in Fig. 8 dargestellt, wobei diese Stellung der Andrückrolle 2 der in Fig. 2 dargestellten Position entspricht. Auch hier sind nicht dargestellte Schaltmittel vorgesehen, welche bei einem derartigen Abschwenken der Andrückrolle 2 einen Maschinenstopp auslösen.When the piston rod 6 is retracted, the spacing of the surfaces of the stops 20 and 21 allows the pressure roller 2 to be pivoted away from the plate cylinder 1 against the force of the spring 8 by a certain angle. This pivoted position of the pressure roller 2 is shown in FIG. 8, this position of the pressure roller 2 corresponding to the position shown in FIG. 2. Switching means (not shown) are also provided here, which stop the machine when the pressure roller 2 is pivoted down in this manner trigger.

Fig. 9 zeigt die ausgefahrene Stellung der Kolbenstange 6 des Arbeitszylinders 7. Ober den Hebel 18 wurde der Mitnehmer 19 um einem den Hubweg der Kolbenstange 6 entsprechenden Winkel verschwenkt, so daß nun die Andrückrolle 2 durch das Anliegen des Mitnehmers 19 an der Fläche des Anschlages 20 an die Oberfläche des Plattenzylinders 1 angedrückt wird. Auch bei diesem Anstellvorgang der Andrückrolle 2 hat die Kolbenstange 6 des Arbeitszylinders 7 zunächst einen bestimmten Leerhub ausgeführt, der der Beabstandung der Flächen der Anschläge 20, 21 einerseits und der entsprechenden Größe des Mitnehmers 19 andererseits entspricht. Nachdem der Mitnehmer 19 in Kontakt mit dem Anschlag 20 kommt, erfolgt ein Verschwenken des Hebels 3 und somit das Anstellen der Andrückrolle 2 bei gleichzeitiger Entspannung der Feder 8.Fig. 9 shows the extended position of the piston rod 6 of the working cylinder 7. About the lever 18, the driver 19 has been pivoted by an angle corresponding to the stroke of the piston rod 6, so that the pressure roller 2 by the contact of the driver 19 on the surface of the stop 20 is pressed against the surface of the plate cylinder 1. Also in this setting process of the pressure roller 2, the piston rod 6 of the working cylinder 7 first performed a certain idle stroke, which corresponds to the spacing of the surfaces of the stops 20, 21 on the one hand and the corresponding size of the driver 19 on the other hand. After the driver 19 comes into contact with the stop 20, the lever 3 is pivoted and thus the pressure roller 2 is turned on while the spring 8 is relaxed.

Fig. 10 zeigt die parallele Anordnung des Arbeitszylinders 7 neben der Stange 15, über welche die Kraft der Feder 8 auf den Hebel 4 und somit den Hebel 3 übertragen wird, der die hier nicht dargestellte Andrückrolle 2 trägt. Die Hebel 18 und 3 sind um einen bestimmten Verschwenkweg - bedingt durch die Größe des Mitnehmers 19 sowie die Beabstandung der Anschläge 20 und 21 - unabhängig voneinander verschwenkbar auf einem gemeinsamen das Gelenk 11 bildenden Gelenkbolzen 16 gelagert, der mit seinem Ende an der Gestellwand 13 befestigt ist.Fig. 10 shows the parallel arrangement of the working cylinder 7 next to the rod 15, via which the force of the spring 8 is transmitted to the lever 4 and thus the lever 3, which carries the pressure roller 2, not shown here. The levers 18 and 3 are pivoted independently of one another about a specific pivoting path - due to the size of the driver 19 and the spacing of the stops 20 and 21 - on a joint joint pin 16 which forms the joint 11 and which is attached at its end to the frame wall 13 is.

Die Feder 8 ist erfindungsgemäß in ihrer Charakteristik derartig ausgelegt, so daß die Gewichtskraft der Andrückrolle 2 oder des sonstwie ausgebildeten Andrückelementes in der vom Plattenzylinder 1 abgestellten Position gerade kompensiert wird. Somit ist gewährleistet, daß bereits geringste Kräfte ausreichen, die Andrückrolle 2 federnd vom Plattenzylinder 1 abzuschwenken. Dadurch entsteht eine maximale Reduzierung des Verletzungsrisikos für eine Bedienperson. Das Andrückelement kann auch als Waschvorrichtung ausgebildet bzw. innerhalb einer solchen angeordnet sein.The spring 8 is designed according to the invention in such a way that the weight of the pressure roller 2 or the pressure element, which is formed in any other way, is just being compensated for in the position in which the plate cylinder 1 is in the position. This ensures that even the slightest forces are sufficient to swing the pressure roller 2 resiliently from the plate cylinder 1. This results in a maximum reduction in the risk of injury for an operator. The pressing element can also be designed as a washing device or arranged within one.

BezugszeichenlisteReference list

11
PlattenzylinderPlate cylinder
22nd
AndrückrollePressure roller
33rd
Hebellever
44th
BuchseRifle
4.14.1
Öffnungopening
55
Kopfhead
66
KolbenstangePiston rod
77
ArbeitszylinderWorking cylinder
88th
Federfeather
99
Muffesleeve
1010th
Gelenkjoint
1111
Gelenkjoint
1212th
GelenkbolzenHinge pin
1313
GestellwandRack wall
1414
HebelarmLever arm
1515
Stangepole
1616
Gelenkbolzen (Gelenk 11)Hinge pin (hinge 11)
1717th
StützlagerSupport bearing
1818th
Hebellever
1919th
MitnehmerDriver
2020th
Anschlagattack
2121
Anschlagattack
2222
SchalthebelGear lever
2323
Schaltercounter

Claims (6)

Aufhängungung für ein einem Zylinder einer Druckmaschine zugeordnetes Andrückelement, insbesondere für ein Andrückelement, welches dem Wechseln einer Druckplatte bei einer Offsetdruckmaschine dient, wobei das Andrückelement über ein Stellmittel an die Oberfläche des Zylinders an- und von diesem abstellbar ist und im vom Zylinder abgestellten Zustand durch eine Feder eine Ausweichbewegung ausführen kann,
dadurch gekennzeichnet,
daß das Andrückelement (Andrückrolle 2) entgegen der Kraft einer gestellfest abgestützten Feder (8) gegenüber dem Zylinder (Plattenzylinder 1) abschwenkbar gelagert ist, und daß das Stellelement (Arbeitszylinder 7) zum Anstellen des Andrückelementes (Andrückrolle 2) an den Zylinder (Plattenzylinder 1) unter Ausführung eines Leerhubes auf das Andrückelement (Andrückrolle 2) einwirkt.Suspension for a pressure element assigned to a cylinder of a printing machine, in particular for a pressure element which serves to change a printing plate in an offset printing machine, the pressure element being able to be adjusted to and removed from the surface of the cylinder by means of an adjusting means and by being in the state in which the cylinder is turned off a spring can make an evasive movement,
characterized by
that the pressure element (pressure roller 2) against the force of a spring (8) supported on the frame is pivotably mounted relative to the cylinder (plate cylinder 1), and that the actuating element (working cylinder 7) for positioning the pressure element (pressure roller 2) on the cylinder (plate cylinder 1 ) acts on the pressure element (pressure roller 2) while performing an idle stroke. Aufhängungung nach Anspruch 1,
dadurch gekennzeichnet,
daß das Stellmittel als Arbeitszylinder (7) ausgebildet ist, dessen Kolbenstange (6) durch eine Öffnung (4.1) einer Buchse (4) hindurch geführt ist und am Ende einen aufgeweiteten Kopf aufweist, und daß an der Kolbenstange (6) als Anschlag eine Muffe (9) beabstandet von dem Kopf (5) angebracht ist.Suspension according to claim 1,
characterized by
that the actuating means is designed as a working cylinder (7), the piston rod (6) of which is guided through an opening (4.1) of a bushing (4) and has a widened head at the end, and that a sleeve is attached to the piston rod (6) as a stop (9) spaced from the head (5). Aufhängungung nach Anspruch 2,
dadurch gekennzeichnet,
daß die Feder (8) koaxial zur Kolbenstange (6) des Arbeitszylinders (7) zwischen der Oberseite des gestellfest abgestützten Arbeitszylinders (7) und der Unterseite der Buchse (4) angeordnet ist.Suspension according to claim 2,
characterized by
that the spring (8) coaxial to the piston rod (6) of the working cylinder (7) between the top of the frame-supported working cylinder (7) and the bottom of the bushing (4) is arranged. Aufhängungung nach Anspruch 1,
dadurch gekennzeichnet,
daß zwei Hebel (3, 18) um eine gemeinsame Achse schwenkbar, nebeneinanderliegend angeordnet sind, wobei ein Hebel (3) an dem Andrückelement (Andrückrolle 2) sowie der Feder (8) angelenkt ist und der zweite Hebel (18) mit dem Stellelement (Arbeitszylinder 7) verbunden ist, und der Hebel (3) zwei Anschläge (20, 21) aufweist, mit denen ein Mitnehmer (19) des Hebels (18) zusammenwirkt.Suspension according to claim 1,
characterized by
that two levers (3, 18) can be pivoted about a common axis, arranged side by side, one lever (3) being articulated on the pressure element (pressure roller 2) and the spring (8) and the second lever (18) with the actuating element ( Working cylinder 7) is connected, and the lever (3) has two stops (20, 21) with which a driver (19) of the lever (18) cooperates. Aufhängungung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß das Andrückelement eine drehbar gelagerte Andrückrolle (2) ist, welche dem Wechseln von Druckplatten eines Plattenzylinders (1) bei Offsetdruckmaschinen dient.Suspension according to one of the preceding claims,
characterized by
that the pressure element is a rotatably mounted pressure roller (2) which is used to change printing plates of a plate cylinder (1) in offset printing machines. Aufhängungung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß das Andrückelement dem Waschen der Oberfläche eines Zylinders dient.Suspension according to one of the preceding claims,
characterized by
that the pressing element is used to wash the surface of a cylinder.
EP95116084A 1994-10-29 1995-10-12 Support for a press element which can be pressed into and retracted from a cylinder of a printing machine Expired - Lifetime EP0709187B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4438754 1994-10-29
DE4438754A DE4438754C2 (en) 1994-10-29 1994-10-29 Suspension for a pressing element which can be set on and off a cylinder of a printing press

Publications (2)

Publication Number Publication Date
EP0709187A1 true EP0709187A1 (en) 1996-05-01
EP0709187B1 EP0709187B1 (en) 1998-07-15

Family

ID=6532056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95116084A Expired - Lifetime EP0709187B1 (en) 1994-10-29 1995-10-12 Support for a press element which can be pressed into and retracted from a cylinder of a printing machine

Country Status (5)

Country Link
US (1) US5562033A (en)
EP (1) EP0709187B1 (en)
JP (1) JP2866041B2 (en)
AT (1) ATE168325T1 (en)
DE (2) DE4438754C2 (en)

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Also Published As

Publication number Publication date
DE4438754C2 (en) 1998-02-19
EP0709187B1 (en) 1998-07-15
JP2866041B2 (en) 1999-03-08
DE4438754A1 (en) 1996-05-02
DE59502817D1 (en) 1998-08-20
ATE168325T1 (en) 1998-08-15
JPH08207248A (en) 1996-08-13
US5562033A (en) 1996-10-08

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