EP0769373A1 - Device for changing printing-cylinder-sleeves of printing machines - Google Patents

Device for changing printing-cylinder-sleeves of printing machines Download PDF

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Publication number
EP0769373A1
EP0769373A1 EP95116394A EP95116394A EP0769373A1 EP 0769373 A1 EP0769373 A1 EP 0769373A1 EP 95116394 A EP95116394 A EP 95116394A EP 95116394 A EP95116394 A EP 95116394A EP 0769373 A1 EP0769373 A1 EP 0769373A1
Authority
EP
European Patent Office
Prior art keywords
shaft
cylinder sleeve
sleeve
pressure cylinder
printing
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
EP95116394A
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German (de)
French (fr)
Other versions
EP0769373B1 (en
Inventor
Bodo Steinmeier
Klaus Schirrich
Wilfried Dr. Kolbe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fischer and Krecke GmbH and Co KG
Original Assignee
Fischer and Krecke GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP95116394A priority Critical patent/EP0769373B1/en
Priority to DK95116394T priority patent/DK0769373T3/en
Priority to AT95116394T priority patent/ATE176194T1/en
Priority to DE59504993T priority patent/DE59504993D1/en
Priority to ES95116394T priority patent/ES2126830T3/en
Application filed by Fischer and Krecke GmbH and Co KG filed Critical Fischer and Krecke GmbH and Co KG
Priority to US08/685,407 priority patent/US5638754A/en
Priority to JP8238522A priority patent/JPH09123396A/en
Publication of EP0769373A1 publication Critical patent/EP0769373A1/en
Application granted granted Critical
Publication of EP0769373B1 publication Critical patent/EP0769373B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/26—Arrangement of cylinder bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2217/00—Printing machines of special types or for particular purposes
    • B41P2217/10—Printing machines of special types or for particular purposes characterised by their constructional features
    • B41P2217/15—Machines with cylinders only supported on one side, e.g. cantilever construction

Definitions

  • the printing cylinder has an exchangeable hollow cylindrical sleeve made of plastic (the sleeve), on the outer circumferential surface of which the clichés are attached.
  • the inner diameter of the sleeve is adapted to the outer diameter of the shaft, so that the sleeve can be pushed onto the shaft with a precise fit in the axial direction.
  • the outer diameter of the sleeve is determined by the desired printing length. By changing the sleeve, the printing press can be set up for different printing lengths.
  • the shaft is provided with reduced-diameter bearing sections which are mounted in the bearing blocks.
  • the sleeve is thus supported only indirectly via the shaft on the bearing blocks.
  • This construction has the disadvantage that not only a precise mounting of the shaft in the bearing blocks, but also a precise seating of the sleeve on the shaft must be ensured if a perfect print quality is to be achieved.
  • the outer diameter of the bearings seated on the shaft must always be smaller than the inner diameter of the sleeve so that the sleeve can be pulled axially from the shaft. There is therefore only a limited range of diameters available for shaft mounting.
  • a further disadvantage is that the sleeves have to have a relatively large wall thickness for longer printing lengths, as a result of which the sleeves are given a relatively large weight and the dimensional stability of the sleeves is made more difficult.
  • the object of the invention is to provide a device of the type mentioned at the outset, which enables stable storage of printing cylinder sleeves with widely varying outer diameters and simple replacement of these sleeves.
  • the bearing points are thus seated directly on the bearing journal of the sleeve.
  • the diameter of the bearings can be selected regardless of the outer diameter of the sleeve in view of the stability requirements.
  • the bearings can consequently be dimensioned so that the sleeves provided for long print lengths, which have a relatively large outer diameter and are correspondingly heavy, can be stably supported, while on the other hand, for smaller print lengths, the outer diameter of the sleeve can be stored as required - if necessary also under the Bearing diameter - can be reduced.
  • the shaft only needs to be dimensioned in such a way that it can absorb the bending moments that occur when the sleeve is lifted out of the bearing blocks. These bending moments are also reduced by the fact that the sleeve itself has a high inherent stiffness due to the rigid arrangement of the bearing journals and is extended by the length of the two bearing journals so that it can reach up to the end of the shaft clamped in the lifting device.
  • the shaft is rotatably but axially movably held in the lifting device, and the outer diameter of the shaft gradually decreases toward the free end.
  • the inner diameter of the sleeve also gradually decreases towards the end that corresponds to the free end of the shaft.
  • the shaft is axially retracted, so that there is sufficient play over the entire length between the shaft and the sleeve, which allows the sleeve to rotate freely. If the sleeve is to be changed, the shaft is extended axially, so that the shaft sections with the larger diameter enter the corresponding sections of the bore of the sleeve with a precise fit.
  • the sleeve is thus kept largely free of play on the shaft, so that it can be safely raised with the aid of the lifting device and the shaft.
  • This construction has the advantage that the shaft can have a relatively large outer diameter in relation to the inner diameter of the sleeve over most of its length and thus a correspondingly high bending stiffness. The outer diameter is greatest at the end of the shaft that is clamped in the lifting device and has to absorb the greatest bending moments.
  • Figures 1 to 3 each show in longitudinal section a pressure cylinder sleeve, preferably made of metal, hereinafter referred to as “sleeve 10", which is interchangeably arranged on a shaft 12.
  • the middle section of the sleeve 10 is designed as a hollow cylindrical drum 14, the outer circumferential surface of which serves to clamp printing plates, not shown.
  • At each end of the drum 14 there is a hollow bearing journal 16, which is fixedly connected to the relevant end wall of the drum 14.
  • a bearing cover 22 is fixed on the bearing block 20, so that the rolling bearing 18 is firmly enclosed and held in position.
  • the bearing journal 16 At one end of the sleeve 10 (on the right in the drawing, the bearing journal 16 has a tubular extension 24 with a reduced diameter.
  • the right side in the drawing, on which the gear 26 is located, will be referred to below as the drive side, while the opposite side will be referred to as the control side.
  • the inner diameter of the sleeve 10 gradually decreases from the drum 14 to the bearing pins 16 and further to the extension 24.
  • a recess 28 is provided in the journal 16 at the free end.
  • the shaft 12 has a main section 30, which extends in FIG. 1 with little play through the control-side bearing journal 16 and to which an end section 34 with a smaller diameter adjoins at the free end via a cone 32.
  • the end section 34 is in turn at the free end provided with a cone.
  • the main section 30 is connected via a short cone to a base section 36 with a larger diameter, which extends through a lifting device 38 and is connected to an axial drive 40 at the free end.
  • Figure 1 shows the state during operation of the printing press, in which the sleeve 10 is driven via the gear 26, while the shaft 12 is held in rotation in the lifting device 38 and does not touch the sleeve 10 at any point. If the sleeve 10 including the gearwheel 26 is to be replaced when the printing machine is at a standstill (or at least when the printing unit belonging to the sleeve 10 is at a standstill), the bearing caps 22 are first removed so that the bearing blocks 20 are open at the top. The axial drive 40 is then actuated to extend the shaft 12 horizontally in the direction of the drive side.
  • the end section 34 of the shaft comes into mating engagement with the bore of the tubular extension 24
  • the main section 30 of the shaft comes into mating engagement with the bore of the drive-side bearing journal 16
  • the base section 36 of the shaft mates with the recess 28 of the other bearing journal, as shown in Figure 2.
  • the respective conical surfaces of the shaft 12 serve as chamfers.
  • the base section 36 of the shaft is then clamped and firmly clamped with the aid of a clamping jaw 42 of the lifting device 38, and the shaft 12 held in this way is raised together with the sleeve 10 with the aid of the lifting device 38 into the position shown in FIG. 2.
  • the journals 16 with the roller bearings 18 are lifted out of the bearing blocks 20 so that the sleeve 10 is cantilevered above the bearing blocks 20. In this state, the unit consisting of sleeve 10, gear 26 and roller bearings 18 can then be pulled off the shaft 12 axially to the drive side, as shown in FIG. 3.
  • another sleeve 10 which differs from the removed sleeve only in the outer diameter of the drum 14, can be installed by going through the operations described above in reverse order.
  • a correct insertion of the bearings 18 into the bearing blocks 20 is thereby facilitated in that the sleeve is held on the shaft 12 without play when the lifting device is lowered (as in FIG Figure 2).
  • the device described above has the advantage that the shaft 12 does not rotate with the sleeve 10 even when the printing press is running, which enables the base section 36 to be fixed more easily in the lifting device 38 and the shaft to be easily coupled to the axial drive 40.
  • a permanently effective axial guide for the shaft can therefore also be provided in the lifting device.
  • both journals 16 are firmly engaged with the shaft 12, so that the inherent stiffness of the sleeve also contributes to the stabilization of the shaft 12 and due to the weight of the sleeve on the only one-sided clamped shaft 12 acting bending forces can be better absorbed. These bending forces occur primarily in the base section 36 of the shaft, which has the largest diameter in this construction.
  • the upper apex of the shaft abuts the inner circumference of the sleeve after a short stroke, so that the sleeve is carried upwards as the sleeve continues to move upward.
  • FIGS. 4 to 6 show a further embodiment in which the shaft 12 rotates with the sleeve 10 during the operation of the printing press (in the state according to FIG. 4).
  • the control-side bearing pin 16 is extended in this embodiment and also has a tubular extension 44 with a smaller diameter.
  • the sleeve 10 sits with its journal 16 essentially free of play, but axially displaceably on the shaft 12.
  • the shaft 12 has a bushing 46 instead of the base section 36 in the area running through the lifting device 38 which forms with the main section 30 of the shaft an annular gap 48 open to the drive side (FIG. 6).
  • the clamping jaw 42 of the lifting device engages on the outer circumference of the bush 46 during the lifting process (FIG. 5).
  • An end portion of the sleeve 46 fits snugly against the circumference of the shaft 12 so that the weight forces acting on the shaft 12 can be transmitted to the sleeve 48 and then absorbed by the clamping mechanism.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Support Of The Bearing (AREA)

Abstract

The device has two bearing blocks (20) rotatably supporting the sleeve during operation of the printer. The sleeve has hollow bearing pins (16) rigidly fixed at both ends to fit in the blocks. A radial play is provided between the cylinder sleeve and shaft (12) running through them during operation of the machine. The sleeve mounted in the blocks freely rotates whilst the shaft is stationary. The shaft can be adjusted by an axial drive relative to the bearing blocks in the axial direction between the operating position and lift-out position.

Description

Die Erfindung betrifft eine Vorrichtung zum Wechseln von Druckzylinderhülsen in Druckmaschinen, mit:

  • zwei Lagerböcken, die zur drehbaren Abstützung der Druckzylinderhülse während des Betriebs der Druckmaschine dienen,
  • einer axial durch die Druckzylinderhülse verlaufenden Welle und
  • einer an einem Ende der Welle, außerhalb des dortigen Lagerbockes angeordneten Hubvorrichtung, mit der die Welle mitsamt der Druckzylinderhülse frei auskragend anhebbar ist, so daß die Druckzylinderhülse von den Lagerböcken freikommt und axial von der Welle abgezogen werden kann.
The invention relates to a device for changing printing cylinder sleeves in printing machines, comprising:
  • two bearing blocks, which serve to rotatably support the printing cylinder sleeve during the operation of the printing press,
  • a shaft running axially through the pressure cylinder sleeve and
  • a lifting device arranged at one end of the shaft, outside the bearing block there, with which the shaft together with the pressure cylinder sleeve can be freely cantilevered so that the pressure cylinder sleeve is released from the bearing blocks and can be axially removed from the shaft.

Aus der Praxis sind Vorrichtungen dieser Art bekannt, die bei Druckmaschinen mit einem sogenannten Sleeve-System eingesetzt werden. Bei diesem System weist der Druckzylinder eine auswechselbare hohlzylindrische Hülse aus Kunststoff (das Sleeve) auf, auf deren äußerer Umfangsfläche die Klischees angebracht werden. Der Innendurchmesser der Hülse ist an den Außendurchmesser der Welle angepaßt, so daß die Hülse in Axialrichtung paßgenau auf die Welle aufgeschoben werden kann. Der Außendurchmesser der Hülse ist durch die jeweils gewünschte Drucklänge bestimmt. Durch Auswechseln der Hülse kann die Druckmaschine für unterschiedliche Drucklängen eingerichtet werden.Devices of this type are known from practice which are used in printing presses with a so-called sleeve system. In this system, the printing cylinder has an exchangeable hollow cylindrical sleeve made of plastic (the sleeve), on the outer circumferential surface of which the clichés are attached. The inner diameter of the sleeve is adapted to the outer diameter of the shaft, so that the sleeve can be pushed onto the shaft with a precise fit in the axial direction. The outer diameter of the sleeve is determined by the desired printing length. By changing the sleeve, the printing press can be set up for different printing lengths.

Die Welle ist an den beiden aus der Hülse herausragenden Enden mit im Durchmesser reduzierten Lagerabschnitten versehen, die in den Lagerböcken gelagert sind. Die Hülse stützt sich somit nur mittelbar über die Welle auf den Lagerböcken ab.At the two ends protruding from the sleeve, the shaft is provided with reduced-diameter bearing sections which are mounted in the bearing blocks. The sleeve is thus supported only indirectly via the shaft on the bearing blocks.

Diese Konstruktion hat den Nachteil, daß nich nur eine präzise Lagerung der Welle in den Lagerböcken, sondern auch ein präziser Sitz der Hülse auf der Welle gewährleistet sein muß wenn eine einwandfreie Druckqualität erreicht werden soll. Außerdem muß der Außendurchmesser der auf der Welle sitzenden Lager stets kleiner sein als der Innendurchmesser der Hülse, damit sich die Hülse axial von der Welle abziehen laßt. Für die Lagerung der Welle steht deshalb nur ein begrenzter Durchmesserbereich zur Verfügung.This construction has the disadvantage that not only a precise mounting of the shaft in the bearing blocks, but also a precise seating of the sleeve on the shaft must be ensured if a perfect print quality is to be achieved. In addition, the outer diameter of the bearings seated on the shaft must always be smaller than the inner diameter of the sleeve so that the sleeve can be pulled axially from the shaft. There is therefore only a limited range of diameters available for shaft mounting.

Ein weiterer Nachteil besteht darin, daß die Hülsen für größere Drucklängen eine relativ große Wanddicke aufweisen müssen, wodurch die Hülsen ein relativ großes Gewicht erhalten und die maßhaltige Fertigung der Hülsen erschwert wird.A further disadvantage is that the sleeves have to have a relatively large wall thickness for longer printing lengths, as a result of which the sleeves are given a relatively large weight and the dimensional stability of the sleeves is made more difficult.

Aufgabe der Erfindung ist es, eine Vorrichtung der eingangs genannten Art zu schaffen, die eine stabile Lagerung von Druckzylinderhülsen mit in weitem Bereich variierenden Außendurchmessern und eine einfache Auswechslung dieser Hülsen ermöglicht.The object of the invention is to provide a device of the type mentioned at the outset, which enables stable storage of printing cylinder sleeves with widely varying outer diameters and simple replacement of these sleeves.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Druckzylinderhülse mit starr an ihren beiden Enden angebrachten hohlen Lagerzapfen versehen ist, die während des Betriebs der Druckmaschine in den Lagerböcken gelagert sind.This object is achieved in that the pressure cylinder sleeve is provided with rigidly attached at both ends of the hollow bearing journals which are mounted in the bearing blocks during operation of the printing press.

Erfindungsgemäß sitzen somit die Lagerstellen direkt an den Lagerzapfen der Hülse. Dies hat den Vorteil, daß die Welle keine Funktion als Zwischenglied bei der drehbaren Abstützung der Hülse während des Betriebs der Druckmaschine hat und folglich ein etwaiges Spiel zwischen der Welle und der Hülse die Qualität der Lagerung nicht mehr beeinträchtigen kann.According to the invention, the bearing points are thus seated directly on the bearing journal of the sleeve. This has the advantage that the shaft has no function as an intermediate element in the rotatable support of the sleeve during operation of the printing press and consequently any play between the shaft and the sleeve can no longer impair the quality of the bearing.

Der Durchmesser der Lager kann unabhängig vom Außendurchmesser der Hülse im Hinblick auf die Stabilitätsanforderungen gewählt werden. Die Lager können folglich so dimensioniert werden, daß auch die für große Drucklängen vorgesehenen Hülsen, die einen relativ großen Außendurchmesser besitzen und entsprechend schwer sind, stabil gelagert werden können, während andererseits für kleinere Drucklängen der Außendurchmesser der Hülse nach Bedarf - ggf. auch unter den Lagerdurchmesser - verringert werden kann.The diameter of the bearings can be selected regardless of the outer diameter of the sleeve in view of the stability requirements. The bearings can consequently be dimensioned so that the sleeves provided for long print lengths, which have a relatively large outer diameter and are correspondingly heavy, can be stably supported, while on the other hand, for smaller print lengths, the outer diameter of the sleeve can be stored as required - if necessary also under the Bearing diameter - can be reduced.

Die Welle braucht nur noch im Hinblick darauf dimensioniert zu werden, daß sie die beim Ausheben der Hülse aus den Lagerböcken auftretenden Biegemomente aufnehmen kann. Diese Biegemomente werden zudem dadurch verringert, daß die Hülse selbst aufgrund der starren Anordnung der Lagerzapfen eine hohe Eigensteifheit besitzt und um die Länge der beiden Lagerzapfen verlängert ist, so daß sie bis dicht an das in der Hubvorrichtung eingespannte Ende der Welle heranreichen kann.The shaft only needs to be dimensioned in such a way that it can absorb the bending moments that occur when the sleeve is lifted out of the bearing blocks. These bending moments are also reduced by the fact that the sleeve itself has a high inherent stiffness due to the rigid arrangement of the bearing journals and is extended by the length of the two bearing journals so that it can reach up to the end of the shaft clamped in the lifting device.

Während beim Stand der Technik die Hülse spielfrei auf der Welle sitzt und folglich die Einspannung der Welle in der Hubvorrichtung während des Betriebs der Druckmaschine gelöst werden muß, damit sich die Welle mit der Hülse mitdrehen kann, ist bei der erfindungsgemäßen Lösung auch eine Bauweise möglich, bei der während des Betriebs der Druckmaschine die Welle drehfest gehalten wird und zwischen der Hülse und der Welle ein ausreichendes Spiel besteht, so daß sich die in den Lagerböcken gelagerte Hülse ohne zu schleifen auf der starren Welle drehen kann.While in the prior art the sleeve sits without play on the shaft and consequently the clamping of the shaft in the lifting device has to be released during operation of the printing press so that the shaft can rotate with the sleeve, a construction is also possible in the solution according to the invention, in which the shaft is held in a rotationally fixed manner during operation of the printing press and there is sufficient play between the sleeve and the shaft so that the sleeve mounted in the bearing blocks can rotate on the rigid shaft without grinding.

Vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous further developments and refinements of the invention are specified in the subclaims.

In einer speziellen Ausführungsform ist die Welle drehfest, jedoch axial beweglich in der Hubvorrichtung gehalten, und der Außendurchmesser der Welle nimmt zum freien Ende hin stufenweise ab. Der Innendurchmesser der Hülse nimmt ebenfalls stufenweise zu dem Ende hin ab, das dem freien Ende der Welle entspricht. Während des Betriebs der Druckmaschine ist die Welle axial zurückgezogen, so daß zwischen der Welle und der Hülse auf ganzer Länge ein ausreichendes Spiel besteht, das eine freie Drehung der Hülse gestattet. Wenn die Hülse gewechselt werden soll, wird die Welle axial ausgefahren, so daß die Wellenabschnitte mit dem größeren Durchmesser paßgenau in die entsprechenden Abschnitte der Bohrung der Hülse eintreten. In diesen Zustand ist somit die Hülse weitgehend spielfrei auf der Welle gehalten, so daß sie mit Hilfe der Hubvorrichtung und der Welle sicher angehoben werden kann. Diese Konstruktion hat den Vorteil, daß die Welle im Verhältnis zum Innendurchmesser der Hülse auf dem größten Teil ihrer Länge einen relativ großen Außendurchmesser und somit eine entsprechend hohe Biegesteifheit aufweisen kann. Der Außendurchmesser ist dabei gerade an dem Ende der Welle am größten, das in die Hubvorrichtung eingespannt ist und die größten Biegemomente aufzunehmen hat.In a special embodiment, the shaft is rotatably but axially movably held in the lifting device, and the outer diameter of the shaft gradually decreases toward the free end. The inner diameter of the sleeve also gradually decreases towards the end that corresponds to the free end of the shaft. During the operation of the printing press, the shaft is axially retracted, so that there is sufficient play over the entire length between the shaft and the sleeve, which allows the sleeve to rotate freely. If the sleeve is to be changed, the shaft is extended axially, so that the shaft sections with the larger diameter enter the corresponding sections of the bore of the sleeve with a precise fit. In this state, the sleeve is thus kept largely free of play on the shaft, so that it can be safely raised with the aid of the lifting device and the shaft. This construction has the advantage that the shaft can have a relatively large outer diameter in relation to the inner diameter of the sleeve over most of its length and thus a correspondingly high bending stiffness. The outer diameter is greatest at the end of the shaft that is clamped in the lifting device and has to absorb the greatest bending moments.

Im folgenden werden bevorzugte Ausführungsbeispiele der Erfindung anhand der Zeichnung näher erläutert.Preferred exemplary embodiments of the invention are explained in more detail below with reference to the drawing.

Es zeigen:

Fig. 1 bis 3
schematische Längsschnitte durch eine Vorrichtung gemäß einem ersten Ausführungsbeispiel der Erfindung in drei unterschiedlichen Stellungen vor und während des Hülsenwechsels; und
Fig. 4 bis 6
Darstellungen analog zu Figuren 1 bis 3, jedoch für ein anderes Ausführungsbeispiel der Erfindung.
Show it:
1 to 3
schematic longitudinal sections through a device according to a first embodiment of the invention in three different positions before and during the sleeve change; and
4 to 6
Representations analogous to Figures 1 to 3, but for another embodiment of the invention.

Figuren 1 bis 3 zeigen jeweils im Längsschnitt eine vorzugsweise aus Metall bestehende Druckzylinderhülse, im folgenden kurz als "Hülse 10" bezeichnet, die auswechselbar auf einer Welle 12 angeordnet ist. Der mittlere Abschnitt der Hülse 10 ist als hohlzylindrische Trommel 14 ausgebildet, deren äußere Umfangsfläche zum Aufspannen von nicht gezeigten Druckklischees dient. An die Trommel 14 schließt sich an jedem Ende koaxial ein hohler Lagerzapfen 16 an, der fest mit der betreffenden Stirnwand der Trommel 14 verbunden ist. Auf jedem Lagerzapfen 16 sitzt ein Wälzlager 18, das in einem gestellfester Lagerbock 20 gehalten ist. In Figur 1 ist auf dem Lagerbock 20 jeweils ein Lagerdeckel 22 fixiert, so daß das Wälzlager 18 fest umschlossen und in Position gehalten wird.Figures 1 to 3 each show in longitudinal section a pressure cylinder sleeve, preferably made of metal, hereinafter referred to as "sleeve 10", which is interchangeably arranged on a shaft 12. The middle section of the sleeve 10 is designed as a hollow cylindrical drum 14, the outer circumferential surface of which serves to clamp printing plates, not shown. At each end of the drum 14 there is a hollow bearing journal 16, which is fixedly connected to the relevant end wall of the drum 14. A roller bearing 18, which is held in a bearing block 20 fixed to the frame, sits on each bearing journal 16. In Figure 1, a bearing cover 22 is fixed on the bearing block 20, so that the rolling bearing 18 is firmly enclosed and held in position.

An einem Ende der Hülse 10 (rechts in der Zeichnung weist der Lagerzapfen 16 einen rohrförmigen Fortsatz 24 mit verringertem Durchmesser auf. Auf diesem Fortsatz ist drehfest ein Zahnrad 26 befestigt, das mit einem nicht gezeigten Antriebszahnrad der Druckmaschine kämmt.At one end of the sleeve 10 (on the right in the drawing, the bearing journal 16 has a tubular extension 24 with a reduced diameter. A gear wheel 26, which meshes with a drive gear wheel, not shown, of the printing press is fastened in a rotationally fixed manner.

Die rechte Seite in der Zeichnung, auf der sich das Zahnrad 26 befindet, soll im folgenden als Antriebseite bezeichnet werden, während die entgegengesetzte Seite als Steuerseite bezeichnet werden soll.The right side in the drawing, on which the gear 26 is located, will be referred to below as the drive side, while the opposite side will be referred to as the control side.

Der Innendurchmesser der Hülse 10 nimmt von der Trommel 14 zu den Lagerzapfen 16 und weiter zu dem Fortsatz 24 hin stufenweise ab. Auf der Steuerseite ist in dem Lagerzapfen 16 am freien Ende eine Ausdrehung 28 vorgesehen.The inner diameter of the sleeve 10 gradually decreases from the drum 14 to the bearing pins 16 and further to the extension 24. On the control side, a recess 28 is provided in the journal 16 at the free end.

Die Welle 12 besitzt einen Hauptabschnitt 30, der sich in Figur 1 mit geringem Spiel durch den steuerseitigen Lagerzapfen 16 erstreckt und an den sich am freien Ende über einen Konus 32 ein Endabschnitt 34 mit kleinerem Durchmesser anschließt. Der Endabschnitt 34 ist seinerseits am freien Ende mit einem Konus versehen. Am entgegengesetzten Ende schließt sich an den Hauptabschnitt 30 über einen kurzen Konus ein Basisabschnitt 36 mit größerem Durchmesser an, der sich durch eine Hubvorrichtung 38 erstreckt und am freien Ende mit einem Axialantrieb 40 verbunden ist.The shaft 12 has a main section 30, which extends in FIG. 1 with little play through the control-side bearing journal 16 and to which an end section 34 with a smaller diameter adjoins at the free end via a cone 32. The end section 34 is in turn at the free end provided with a cone. At the opposite end, the main section 30 is connected via a short cone to a base section 36 with a larger diameter, which extends through a lifting device 38 and is connected to an axial drive 40 at the free end.

Figur 1 zeigt den Zustand während des Betriebs der Druckmaschine, in dem die Hülse 10 über das Zahnrad 26 angetrieben wird, während die Welle 12 drehfest in der Hubvorrichtung 38 gehalten ist und die Hülse 10 an keiner Stelle berührt. Wenn bei stillstehender Druckmaschine (oder zumindest bei Stillstand des zu der Hülse 10 gehörenden Druckwerks) die Hülse 10 einschließlich des Zahnrades 26 ausgewechselt werden soll, so werden zunächst die Lagerdeckel 22 entfernt, so daß die Lagerböcke 20 nach oben offen sind. Danach wird der Axialantrieb 40 betätigt, um die Welle 12 waagerecht in Richtung auf die Antriebsseite auszufahren. Dabei kommt der Endabschnitt 34 der Welle mit der Bohrung des rohrförmigen Fortsatzes 24 in Paßeingriff, der Hauptabschnitt 30 der Welle kommt mit der Bohrung des antriebsseitigen Lagerzapfens 16 in Paßeingriff, und der Basisabschnitt 36 der Welle kommt mit der Ausdrehung 28 des anderen Lagerzapfens in Paßeingriff, wie in Figur 2 gezeigt ist. Bei diesem Vorgang dienen die jeweiligen Konusflächen der Welle 12 als Einführungsschrägen.Figure 1 shows the state during operation of the printing press, in which the sleeve 10 is driven via the gear 26, while the shaft 12 is held in rotation in the lifting device 38 and does not touch the sleeve 10 at any point. If the sleeve 10 including the gearwheel 26 is to be replaced when the printing machine is at a standstill (or at least when the printing unit belonging to the sleeve 10 is at a standstill), the bearing caps 22 are first removed so that the bearing blocks 20 are open at the top. The axial drive 40 is then actuated to extend the shaft 12 horizontally in the direction of the drive side. Here, the end section 34 of the shaft comes into mating engagement with the bore of the tubular extension 24, the main section 30 of the shaft comes into mating engagement with the bore of the drive-side bearing journal 16, and the base section 36 of the shaft mates with the recess 28 of the other bearing journal, as shown in Figure 2. In this process, the respective conical surfaces of the shaft 12 serve as chamfers.

Anschließend wird der Basisabschnitt 36 der Welle mit Hilfe einer Klemmbacke 42 der Hubvorrichtung 38 geklemmt und fest eingespannt, und die auf diese Weise festgehaltene Welle 12 wird zusammen mit der Hülse 10 mit Hilfe der Hubvorrichtung 38 in die in Figur 2 gezeigte Position angehoben. Die Lagerzapfen 16 mit den Wälzlagern 18 werden dabei aus den Lagerböcken 20 herausgehoben, so daß sich die Hülse 10 insgesamt frei auskragend oberhalb der Lagerböcke 20 befindet. In diesem Zustand kann dann die Einheit aus Hülse 10, Zahnrad 26 und Wälzlagern 18 axial zur Antriebsseite von der Welle 12 abgezogen werden, wie in Figur 3 gezeigt ist.The base section 36 of the shaft is then clamped and firmly clamped with the aid of a clamping jaw 42 of the lifting device 38, and the shaft 12 held in this way is raised together with the sleeve 10 with the aid of the lifting device 38 into the position shown in FIG. 2. The journals 16 with the roller bearings 18 are lifted out of the bearing blocks 20 so that the sleeve 10 is cantilevered above the bearing blocks 20. In this state, the unit consisting of sleeve 10, gear 26 and roller bearings 18 can then be pulled off the shaft 12 axially to the drive side, as shown in FIG. 3.

Danach kann eine andere Hülse 10, die sich von der entfernten Hülse nur hinsichtlich des Außendurchmessers der Trommel 14 unterscheidet, installiert werden, indem die oben beschriebenen Vorgänge in umgekehrter Reihenfolge durchlaufen werden. Dabei wird ein positionsgerechtes einsetzen der Lager 18 in die Lagerböcke 20 dadurch derleichtert, daß die Hülse beim Absenken der Hubvorrichtung spielfrei auf der Welle 12 gehalten ist (wie in Figur 2).Thereafter, another sleeve 10, which differs from the removed sleeve only in the outer diameter of the drum 14, can be installed by going through the operations described above in reverse order. A correct insertion of the bearings 18 into the bearing blocks 20 is thereby facilitated in that the sleeve is held on the shaft 12 without play when the lifting device is lowered (as in FIG Figure 2).

Die oben beschriebene Vorrichtung hat den Vorteil, daß die Welle 12 sich auch bei laufender Druckmaschine nicht mit der Hülse 10 mitdreht, was eine einfachere Fixierung des Basisabschnitts 36 in der Hubvorrichtung 38 sowie eine einfache Koppelung der Welle mit dem Axialantrieb 40 ermöglicht. Anstelle der Klemmbacke 42 kann deshalb in der Hubvorrichtung auch ein permanent wirksame Axialführung für die Welle vorgesehen sein.The device described above has the advantage that the shaft 12 does not rotate with the sleeve 10 even when the printing press is running, which enables the base section 36 to be fixed more easily in the lifting device 38 and the shaft to be easily coupled to the axial drive 40. Instead of the clamping jaw 42, a permanently effective axial guide for the shaft can therefore also be provided in the lifting device.

Während der Phasen, in denen die Hülse 10 von den Lagerböcken 20 abgehoben ist, stehen beide Lagerzapfen 16 fest mit der Welle 12 in Eingriff, so daß die Eigensteifheit der Hülse mit zur Stabilisierung der Welle 12 beiträgt und die aufgrund des Gewichts der Hülse auf die nur einseitig eingespannte Welle 12 wirkenden Biegekräfte besser aufgenommen werden können. Diese Biegekräfte treten vornehmlich in dem Basisabschnitt 36 der Welle auf, die bei dieser Konstruktion den größten Durchmesser hat.During the phases in which the sleeve 10 is lifted from the pedestals 20, both journals 16 are firmly engaged with the shaft 12, so that the inherent stiffness of the sleeve also contributes to the stabilization of the shaft 12 and due to the weight of the sleeve on the only one-sided clamped shaft 12 acting bending forces can be better absorbed. These bending forces occur primarily in the base section 36 of the shaft, which has the largest diameter in this construction.

In einer modifizierten Ausführungsform ist es auch möglich, den Außendurchmesser der Welle 12 zumindest in den innerhalb der Hülse 10 liegenden Abschnitten so zu verringern, daß er kleiner ist als der kleinste Innendurchmesser der Hülse, so daß während des Betriebs der Druckmaschine (in dem Zustand entsprechend Figur 1) überall ein ausreichender Ringspalt zwischen der Welle 12 und der Hülse 10 besteht und die in den Lagerböcken 20 gelagerte Hülse sich frei drehen kann. In diesem Fall kann auf den Axialantrieb 40 verzichtet werden. Wenn die Hülse mit Hilfe des Hub- und Klemmechanismus 38 und der Welle 12 angehoben wird, stößt nach einem kurzen Hubweg der obere Scheitel der Welle am Innenumfang der Hülse an, so daß bei der weiteren Aufwärtsbewegung der Hülse nach oben mitgenommen wird.In a modified embodiment, it is also possible to reduce the outside diameter of the shaft 12, at least in the sections lying inside the sleeve 10, so that it is smaller than the smallest inside diameter of the sleeve, so that during the operation of the printing press (in the corresponding state Figure 1) everywhere there is a sufficient annular gap between the shaft 12 and the sleeve 10 and the sleeve mounted in the bearing blocks 20 can rotate freely. In this case, the axial drive 40 can be dispensed with. If the sleeve is lifted with the aid of the lifting and clamping mechanism 38 and the shaft 12, the upper apex of the shaft abuts the inner circumference of the sleeve after a short stroke, so that the sleeve is carried upwards as the sleeve continues to move upward.

Figuren 4 bis 6 zeigen eine weitere Ausführungsform, bei der sich die Welle 12 während des Betriebs der Druckmaschine (in dem Zustand gemäß Figur 4) mit der Hülse 10 mitdreht. Der steuerseitige Lagerzapfen 16 ist bei dieser Ausführungsform verlängert und weist darüber hinaus noch einen rohrförmigen Fortsatz 44 mit kleinerem Durchmesser auf. Die Hülse 10 sitzt in diesem Fall mit ihren Lagerzapfen 16 im wesentlichen spielfrei, jedoch axial verschiebbar auf der Welle 12. Die Welle 12 weist in dem durch die Hubvorrichtung 38 verlaufenden Bereich anstelle des Basisabschnitts 36 eine Buchse 46 auf, die mit dem Hauptabschnitt 30 der Welle einen zur Antriebsseite offenen Ringspalt 48 bildet (Figur 6). Die Klemmbacke 42 der Hubvorrichtung greift während des Hubvorgangs (Figur 5) am äußeren Umfang der Buchse 46 an. Ein Endabschnitt der Buchse 46 liegt paßgenau am Umfang der Welle 12 an, so daß die auf die Welle 12 wirkenden Gewichtskräfte auf die Buchse 48 übertragen und dann von dem Klemmechanismus aufgenommen werden können.FIGS. 4 to 6 show a further embodiment in which the shaft 12 rotates with the sleeve 10 during the operation of the printing press (in the state according to FIG. 4). The control-side bearing pin 16 is extended in this embodiment and also has a tubular extension 44 with a smaller diameter. In this case, the sleeve 10 sits with its journal 16 essentially free of play, but axially displaceably on the shaft 12. The shaft 12 has a bushing 46 instead of the base section 36 in the area running through the lifting device 38 which forms with the main section 30 of the shaft an annular gap 48 open to the drive side (FIG. 6). The clamping jaw 42 of the lifting device engages on the outer circumference of the bush 46 during the lifting process (FIG. 5). An end portion of the sleeve 46 fits snugly against the circumference of the shaft 12 so that the weight forces acting on the shaft 12 can be transmitted to the sleeve 48 and then absorbed by the clamping mechanism.

In den in Figuren 4 und 5 gezeigten Zuständen greift der rohrförmige Fortsatz 44 des steuerseitigen Lagerzapfens 16 in den Ringspalt 48 zwischen der Buchse 46 und dem Hauptabschnitt 30 der Welle 12 ein, so daß eine biegesteife Verbindung zwischen der Hülse der Welle und der Buchse geschaffen wird.In the states shown in Figures 4 and 5, the tubular extension 44 of the control-side bearing pin 16 engages in the annular gap 48 between the bush 46 and the main portion 30 of the shaft 12, so that a rigid connection between the sleeve of the shaft and the bushing is created .

Wenn die Hülse 10 ausgewechselt werden soll, werden in diesem Fall nur die Lagerdeckel 22 entfernt, und die Buchse 46 wird mit der Klemmbacke 42 eingespannt, ohne daß eine Axialbewegung der Welle 12 erfolgt. Anschließend wird die Welle 12 zusammen mit der Hülse 10 mit Hilfe des Hub- und Klemmechanismus 38 angehoben (Figur 5), und die Hülse 10 wird axial von der Welle 12 abgezogen (Figur 6). Beim Installieren einer neuen Hülse werden die oben beschriebenen Schritte in umgekehrter Reihenfolge durchlaufen. Dabei wird in der letzten Phase die Hubvorrichtung 38 so weit geöffnet bzw. abgesenkt, daß sich die Welle 12 und die Buchse 46 mit der Hülse 10 mitdrehen können.If the sleeve 10 is to be replaced, only the bearing cover 22 is removed in this case, and the bushing 46 is clamped with the clamping jaw 42 without the shaft 12 moving axially. The shaft 12 is then raised together with the sleeve 10 with the aid of the lifting and clamping mechanism 38 (FIG. 5), and the sleeve 10 is pulled axially from the shaft 12 (FIG. 6). When installing a new sleeve, the steps described above are carried out in reverse order. In the last phase, the lifting device 38 is opened or lowered so far that the shaft 12 and the bushing 46 can rotate with the sleeve 10.

Claims (9)

Vorrichtung zum Wechseln von Druckzylinderhülsen (10) in Druckmaschinen mit: - zwei Lagerböcken (20), die zur drehbaren Abstützung der Druckzylinderhülse während des Betriebs der Druckmaschine dienen, - einer axial durch die Druckzylinderhülse verlaufenden Welle (12) und - einer an einem Ende der Welle (12) außerhalb des dortigen Lagerbockes (20) angeordneten Hubvorrichtung (38), mit der die Welle mitsamt der Druckzylinderhülse (10) frei auskragend anhebbar ist, so daß die Druckzylinderhülse von den Lagerböcken (20) freikommt und axial von der Welle (12) abgezogen werden kann, dadurch gekennzeichnet, daß die Druckzylinderhülse (10) mit starr an ihren beiden Enden angebrachten hohlen Lagerzapfen (16) versehen ist, die während des Betriebs der Druckmaschine in den Lagerböcken (20) gelagert sind.Device for changing printing cylinder sleeves (10) in printing machines with: - two bearing blocks (20) which serve to rotatably support the printing cylinder sleeve during the operation of the printing press, - An axially extending through the pressure cylinder sleeve shaft (12) and - One at one end of the shaft (12) outside the bearing block (20) arranged lifting device (38) with which the shaft together with the pressure cylinder sleeve (10) can be freely cantilevered so that the pressure cylinder sleeve is released from the bearing blocks (20) and can be withdrawn axially from the shaft (12), characterized in that the printing cylinder sleeve (10) is provided with hollow bearing pins (16) rigidly attached at both ends thereof, which are mounted in the bearing blocks (20) during operation of the printing press. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß zwischen der Druckzylinderhülse (10) und der Welle (12) während des Betriebs der Druckmaschine ein solches Radialspiel besteht, daß die in den Lagerböcken gelagerte Druckzylinderhülse bei feststehender Welle (12) frei drehbar ist.Apparatus according to claim 1, characterized in that there is such a radial clearance between the printing cylinder sleeve (10) and the shaft (12) during operation of the printing machine that the printing cylinder sleeve mounted in the bearing blocks can be freely rotated when the shaft (12) is stationary. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Welle (12) mittels eines Axialantriebs (40) relativ zu den Lagerböcken (20) in Axialrichtung zwischen einer Betriebsposition und einer Aushebeposition verstellbar ist, daß die Druckzylinderhülse (10) Abschnitte mit unterschiedlichen Innendurchmessern und die Welle (12) Abschnitte (30, 34, 36) mit unterschiedlichen Außendurchmessern aufweist und daß in der Aushebeposition die Abschnitte (30, 34, 36) der Welle jeweils in Abschnitten der Druckzylinderhülse (10) liegen, deren Innendurchmesser gleich dem Außendurchmesser des betreffenden Wellenabschnitts ist, während in der Betriebsposition die Abschnitte (30, 34, 36) der Welle (12) ganz in Abschnitten der Druckzylinderhülse (10) liegen, die einen größeren Innendurchmesser haben.Device according to claim 2, characterized in that the shaft (12) can be adjusted axially between an operating position and a lifting position by means of an axial drive (40) relative to the bearing blocks (20), that the pressure cylinder sleeve (10) has sections with different inside diameters and the Shaft (12) has sections (30, 34, 36) with different outer diameters and that in the lifting position the sections (30, 34, 36) of the shaft each lie in sections of the pressure cylinder sleeve (10), the inner diameter of which is equal to the outer diameter of the shaft section in question is, while in the operating position the sections (30, 34, 36) of the shaft (12) lie entirely in sections of the pressure cylinder sleeve (10) which have a larger inner diameter. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Außendurchmesser der Welle (12) von dem in der Hubvorrichtung (38) gehaltenen Ende zum entgegengesetzten Ende hin abnimmt.Device according to claim 3, characterized in that the outer diameter of the shaft (12) decreases from the end held in the lifting device (38) towards the opposite end. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Welle (12) während des Betriebs der Druckmaschine mitdrehbar in der in den Lagerböcken (20) gelagerten Druckzylinderhülse (10) gehalten und in der Hubvorrichtung (38) frei drehbar ist.Device according to Claim 1, characterized in that the shaft (12) is rotatably held in the printing cylinder sleeve (10) mounted in the bearing blocks (20) during the operation of the printing press and is freely rotatable in the lifting device (38). Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß auf einem Ende der Welle (12) eine Buchse (46) starr befestigt ist, an deren Außenumfang die Hubvorrichtung (38) angreift und die mit der Welle einen zum entgegengesetzten Ende der Welle offenen Ringspalt (48) bildet, in den ein rohrförmiger Fortsatz (44) eines Lagerzapfens (16) der Druckzylinderhülse (10) eingreift.Device according to claim 5, characterized in that on one end of the shaft (12) a bushing (46) is rigidly fastened, on the outer circumference of which the lifting device (38) engages and which, together with the shaft, has an annular gap (48 ) in which a tubular extension (44) of a bearing pin (16) of the pressure cylinder sleeve (10) engages. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Lagerzapfen (16) der Druckzylinderhülse (10) jeweils ein Wälzlager (18) tragen, das beim Wechsel der Druckzylinderhülse (10) zusammen mit der Druckzylinderhülse aus dem betreffenden Lagerbock (20) aushebbar ist.Device according to one of the preceding claims, characterized in that the bearing journals (16) of the pressure cylinder sleeve (10) each carry a roller bearing (18) which can be lifted out of the bearing block (20) together with the pressure cylinder sleeve when the pressure cylinder sleeve (10) is changed . Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß ein zum Drehantrieb der Druckzylinderhülse (10) dienendes Zahnrad (26) drehfest auf der Druckzylinderhülse montiert ist und mit dieser eine auswechselbare Einheit bildet.Device according to one of the preceding claims, characterized in that a gearwheel (26) serving to drive the pressure cylinder sleeve (10) is mounted in a rotationally fixed manner on the pressure cylinder sleeve and forms an exchangeable unit with the latter. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß der Lagerzapfen (16) an dem Ende der Druckzylinderhülse (10), das der Hubvorrichtung (38) entgegengesetzt ist, einen axial zum freien Ende hin vorspringenden rohrförmigen Fortsatz (24) aufweist, der das Zahnrad (26) trägt.Device according to claim 8, characterized in that the bearing pin (16) at the end of the pressure cylinder sleeve (10), which is opposite the lifting device (38), has a tubular extension (24) projecting axially towards the free end, which extends the gear wheel ( 26) carries.
EP95116394A 1995-10-18 1995-10-18 Device for changing printing-cylinder-sleeves of printing machines Expired - Lifetime EP0769373B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DK95116394T DK0769373T3 (en) 1995-10-18 1995-10-18 Device for replacing pressure cylinder caps in printing machines
AT95116394T ATE176194T1 (en) 1995-10-18 1995-10-18 DEVICE FOR CHANGING PRINTING CYLINDER SLEEVES IN PRINTING MACHINES
DE59504993T DE59504993D1 (en) 1995-10-18 1995-10-18 Device for changing printing cylinder sleeves in printing machines
ES95116394T ES2126830T3 (en) 1995-10-18 1995-10-18 DEVICE FOR THE REPLACEMENT OF THE PRINT CYLINDER BUSHINGS IN PRINTING MACHINES.
EP95116394A EP0769373B1 (en) 1995-10-18 1995-10-18 Device for changing printing-cylinder-sleeves of printing machines
US08/685,407 US5638754A (en) 1995-10-18 1996-07-24 Apparatus for changing printing cylinder sleeves in printing machines
JP8238522A JPH09123396A (en) 1995-10-18 1996-08-21 Printing cylinder sleeve exchange device in printing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95116394A EP0769373B1 (en) 1995-10-18 1995-10-18 Device for changing printing-cylinder-sleeves of printing machines

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EP0769373A1 true EP0769373A1 (en) 1997-04-23
EP0769373B1 EP0769373B1 (en) 1999-01-27

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EP95116394A Expired - Lifetime EP0769373B1 (en) 1995-10-18 1995-10-18 Device for changing printing-cylinder-sleeves of printing machines

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US (1) US5638754A (en)
EP (1) EP0769373B1 (en)
JP (1) JPH09123396A (en)
AT (1) ATE176194T1 (en)
DE (1) DE59504993D1 (en)
DK (1) DK0769373T3 (en)
ES (1) ES2126830T3 (en)

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US6523470B2 (en) 1999-02-01 2003-02-25 Fischer & Krecke Gmbh & Co. Printing cylinder
US6647880B2 (en) 2000-10-13 2003-11-18 Fischer & Krecke Gmbh & Co. Flexographic printing press with device for washing the back-pressure cylinder
DE202016102779U1 (en) * 2016-05-25 2017-08-28 Bobst Bielefeld Gmbh Device for actuating a hydraulic carrier bar of a rotary printing machine
US11001052B2 (en) 2016-05-25 2021-05-11 Bobst Bielefeld Gmbh Apparatus for actuating a hydraulic carrier rod of a rotary printing machine

Also Published As

Publication number Publication date
ES2126830T3 (en) 1999-04-01
JPH09123396A (en) 1997-05-13
EP0769373B1 (en) 1999-01-27
DK0769373T3 (en) 1999-09-13
DE59504993D1 (en) 1999-03-11
ATE176194T1 (en) 1999-02-15
US5638754A (en) 1997-06-17

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