EP0388646B1 - Washing device - Google Patents

Washing device Download PDF

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Publication number
EP0388646B1
EP0388646B1 EP90103286A EP90103286A EP0388646B1 EP 0388646 B1 EP0388646 B1 EP 0388646B1 EP 90103286 A EP90103286 A EP 90103286A EP 90103286 A EP90103286 A EP 90103286A EP 0388646 B1 EP0388646 B1 EP 0388646B1
Authority
EP
European Patent Office
Prior art keywords
spacer
distancing
washing device
membrane
washing
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.)
Expired - Lifetime
Application number
EP90103286A
Other languages
German (de)
French (fr)
Other versions
EP0388646A3 (en
EP0388646A2 (en
Inventor
Gerhard Dipl.-Ing. Loos
Nikolaus Dr. Ing. Spiegel
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0388646A2 publication Critical patent/EP0388646A2/en
Publication of EP0388646A3 publication Critical patent/EP0388646A3/en
Application granted granted Critical
Publication of EP0388646B1 publication Critical patent/EP0388646B1/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
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/06—Cleaning arrangements or devices for offset cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/20—Wiping devices
    • B41P2235/24—Wiping devices using rolls of cleaning cloth
    • B41P2235/246—Pressing the cleaning cloth against the cylinder

Definitions

  • the invention relates to a washing device for a printing press, for cleaning the surface of a roller or a cylinder, for example for cleaning the blanket of the blanket cylinder.
  • a washing device has a supply spool and a dirty cloth spool for a washing cloth, the washing cloth being able to be soaked with washing liquid.
  • the washcloth is pulled off the supply spool. It runs over a pressure element, which can be actuated to bring the washcloth into contact, for example on the rubber blanket of the rubber blanket cylinder to be cleaned.
  • the pressure element is an elastic membrane part, which is gripped on a spacer.
  • the pressure element can be actuated by building up a compressed air cushion between the membrane part and the spacer part.
  • the spacer ensures the permanent spacing of the edge regions of the membrane part, which only just enables the compressed air cushion to be built up between the membrane part and the spacer.
  • Such a washing device is known for example from DE-OS 30 05 469.
  • the spacer part is formed in the form of a U-profile, the membrane part covering the opening of the U-profile in a cross-sectional illustration.
  • the edge areas of the membrane part are fastened in a sealed manner on legs of the U-profile.
  • the sealing attachment of the membrane part is perceived as very complex.
  • the edge areas of the membrane part are fastened to the legs of the U-profile with a plurality of screws with the interposition of a strip. A such attachment is to be made on both long sides of this spacer.
  • the object of the invention is to design and further develop the known washing device in such a way that the pressing element is simple and easy to use in terms of production.
  • the spacer is accommodated in a holder part in the manner of a sliding block.
  • the edge regions of the membrane part are tightly clamped between the spacer part and the holding part. More precisely, the edge areas are clamped between the guide projections of the holding part and the assigned edge areas of the spacer part.
  • the spacer is used to form a closed pressure chamber on the side of the membrane part facing away from, for example, a rubber blanket cylinder, i.e. on the underside of the membrane part, the spacer forming the bottom of the pressure chamber, and as a part which, as it were, spans the membrane part actuated state by the holder of the edge areas allows the bulging of the membrane part.
  • the spacer is used directly for holding the edge regions of the membrane part, as described above.
  • the pressure element extends essentially over the length of the roller or cylinder to be cleaned, so that the longitudinal edge regions mentioned address those which extend essentially parallel to the axis of the roller or cylinder.
  • the spacer part can advantageously be designed as an insertion part, as can the membrane part, which can be preformed with corresponding edge regions.
  • the membrane part can be inserted into the holding part together with the spacer part and then clamped in the inserted state.
  • the membrane part expediently has preformed, outwardly facing edge regions which automatically engage behind the guide projections of the holding part when inserted.
  • the membrane part is immediately in the holder part perpendicular to the direction of insertion when inserted into the holder part - which also applies to the spacer.
  • the invention further proposes that the spacer is pretensioned against the guide projections of the holding part by means of tensioning screws which are supported on the holding part. Between the holder part and the spacer part, with the interposition of the membrane part, there is a closed tension circuit, the essential longitudinal edges of the membrane part and the holder part on the one hand and the spacer part on the other hand interacting positively.
  • the membrane part does not need to be preformed, or only slightly, for example with regard to the edge regions.
  • the spacer is decisive for the shape of the membrane part in the unactuated state if no compressed air cushion is built up between the membrane part and the spacer, as will be explained in more detail below.
  • the spacer is then responsible for the formation of a curvature that presses the washcloth onto the blanket cylinder, for example.
  • the membrane part can already be largely adapted to the shape of the spacer part, in particular with regard to the aforementioned laterally projecting edge regions which are clamped in as a seal between the spacer part and the holding part.
  • the spacer is by means of the clamping screws in a direction perpendicular to an extension direction of the longitudinal guide projections.
  • the clamping screws act in a cross-sectional view approximately in the middle of the spacer.
  • the membrane part consists of a rubber-elastic material, while the spacer part and the holding part can be, for example, drawn metal profile parts.
  • the membrane part is inflated pneumatically to actuate the pressure element.
  • a compressed air connection is provided on the spacer, which passes freely through the holding part, but is firmly connected to the spacer.
  • the spacer part is braced against the holding part, the compressed air connection which is stationary in the holding part can move freely with respect to the holding part.
  • the compressed air connection opens into a corresponding hole in the spacer.
  • the membrane part By building up a compressed air cushion, the membrane part is lifted from the spacer part when actuated, as mentioned to form a curvature.
  • the wash cloth running outside on the membrane part is pressed against the cylinder to be washed or the roller to be washed.
  • the membrane part With regard to the frontal fastening of the membrane part, it is provided that the membrane part is fixedly attached to an end face of the spacer part.
  • the membrane part can be connected to the end face of the spacer part by means of fastening screws. This results in an advantageous addition to the inventive concept of sealingly clamping the membrane part on both sides between the holding part and the spacer part, with the spacer part being designed in the manner of a sliding block.
  • the membrane part can be firmly connected to the spacer part by the end bracket before the spacer part is inserted.
  • the spacer can then be pushed into the holding part together with the membrane part in a simple manner. After tightening the clamping screws, the membrane part is sealed on the whole or held against the spacer.
  • a tensioning plate is interposed between the membrane part and the heads of the fastening screws with regard to the end-face fastening, which ensures a uniform contact pressure over the width of the end face.
  • a washing device 1 which in the installed state, as shown in FIGS. 1 to 3, is assigned to a blanket cylinder 2 of a printing press.
  • the washing device 1 has a supply spool 3 for a wash cloth 5, which can be wound up on a dirty cloth spool 4.
  • the dirty cloth spool 4 can be actuated step by step by means of a pneumatic device 6.
  • the wash cloth 5 can be wetted with washing liquid from a dispensing device 7.
  • the washing device 1 shown is designed as a slide-in device which is held by means of bolts 8 in mutually opposite machine-fixed holders 22, a respective holder 22 being firmly connected to a side wall 28 of the printing press.
  • the washcloth 5 is pulled by winding it on the dirty-cloth spool 4 via a pressure element 9, which is shown in FIGS. 2 and 3 in the actuated state.
  • the pressure element 9 has a membrane part 10, which is sealed on a spacer 11.
  • a compressed air connection 12 see FIG. 4
  • a compressed air cushion can be built up between the outside upper side 13 of the spacer part 11 and the facing underside of the membrane part 10, for pressing the washcloth 5 against a cylinder or a roller during a washing process.
  • the membrane part 10 lies against the substantially rectangular, flat outer surface of the spacer part 11. In the actuated state, the membrane part 10 bulges out, as shown in FIG. 3.
  • the spacer 11 and the membrane part 10 are received in a bracket part 14 like a sliding block.
  • the guide projections 15, 15 'of the holding part are engaged behind by edge regions 16 and 17 of the spacer part 11 and the membrane part 10, respectively.
  • the spacer 11 is braced against the guide projections 15, 15 'by means of tensioning screws 18, which are supported on the holding part 14, with an intermediate layer of the membrane part 10 or more precisely the edge regions 17 of the membrane part 10.
  • the spacer part 11 is in this case acted upon by means of the tensioning screws 18 perpendicular to an extension direction of the guide projections 15, 15 '. 3 that the clamping screws 18 act approximately centrally on the spacer 11.
  • the membrane part 10 advantageously has preformed, outwardly facing edge regions 17. Just like the spacer part 11, it can simply be pushed into the mounting part 14 for assembly.
  • the guide protrusion 15 ′ can be designed to protrude in the direction of the blanket cylinder 2 (see FIG. 2) for guiding or deflecting the washcloth 5.
  • the compressed air connection 12 is shown in detail in FIG. 4. It passes freely through a passage 19 in the holding part 14 and is screwed into the spacer 11 by means of a thread 20. During assembly, when the spacer 11 is braced against the guide projections 15, 15 ', the spacer 11 migrates in the direction of the guide projections 15, 15'. The compressed air connection can easily follow this movement.
  • the compressed air connection 12 is also connected to a compressed air line 21 which is led out of the washing device 1 for the supply of compressed air, which is not shown in detail here.
  • the membrane part 10 which consists of a rubber-elastic material, is shown overall in perspective.
  • the outward-facing longitudinal edge regions 17 can be seen.
  • the end face 23 of the membrane part 10 is drawn deeper by the projection 27 than the longitudinal edge of the membrane part 10.
  • two fastening openings 24 are formed in the end face 23 in order to enable a screw connection, as further described in detail in FIGS 6 and 7 is shown.
  • the end face that is not visible in FIG. 5 is designed accordingly.
  • the procedure can be such that the membrane part 10 is first firmly connected to the spacer 11 on the end face 23 and the spacer 11 is then inserted into the guide part 14 together with the membrane part 10 already attached to it.
  • the aforementioned tensioning of the spacer 11 against the guide projections 15, 15 ′ results in the longitudinal sealing seal between the membrane part 10 and the spacer 11.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Cleaning In General (AREA)

Description

Die Erfindung betrifft eine Wascheinrichtung für eine Druckmaschine, zum Reinigen der Oberfläche einer Walze oder eines Zylinders, beispielsweise zur Reinigung des Gummituches des Gummituchzylinders. Eine solche Wascheinrichtung besitzt eine Vorrats- und eine Schmutztuchspule für ein Waschtuch, wobei das Waschtuch mit Waschflüssigkeit getränkt werden kann. Durch Aufwickeln des Waschtuches auf der Schmutztuchspule wird das Waschtuch von der Vorratsspule abgezogen. Es läuft über ein Andruckelement, welches wahlweise betätigbar ist, um das Waschtuch in Anlage zu bringen, beispielsweise an das zu reinigende Gummituch des Gummituchzylinders. Im einzelnen ist das Andruckelement ein elastisches Membranteil, das an einem Distanzteil gefaßt ist. Durch Aufbau eines Druckluftpolsters zwischen dem Membranteil und dem Distanzteil ist das Andruckelement betätigbar. Im betätigten Zustand sorgt das Distanzteil für die bleibende Beabstandung der Randbereiche des Membranteils, was eben erst den Aufbau des Druckluftpolsters zwischen dem Membranteil und dem Distanzteil ermöglicht.The invention relates to a washing device for a printing press, for cleaning the surface of a roller or a cylinder, for example for cleaning the blanket of the blanket cylinder. Such a washing device has a supply spool and a dirty cloth spool for a washing cloth, the washing cloth being able to be soaked with washing liquid. By winding the washcloth on the dirty cloth spool, the washcloth is pulled off the supply spool. It runs over a pressure element, which can be actuated to bring the washcloth into contact, for example on the rubber blanket of the rubber blanket cylinder to be cleaned. In particular, the pressure element is an elastic membrane part, which is gripped on a spacer. The pressure element can be actuated by building up a compressed air cushion between the membrane part and the spacer part. In the actuated state, the spacer ensures the permanent spacing of the edge regions of the membrane part, which only just enables the compressed air cushion to be built up between the membrane part and the spacer.

Eine derartige Wascheinrichtung ist beispielsweise aus der DE-OS 30 05 469 bekannt. Das Distanzteil ist bei dieser bekannten Wascheinrichtung in Form eines U-Profils gebildet, wobei in einer Querschnittsdarstellung das Membranteil die Öffnung des U-Profils abdeckt. Die Randbereiche des Membranteils sind bei dieser bekannten Wascheinrichtung außen auf Schenkeln des U-Profils abgedichtet befestigt. Bei dieser Wascheinrichtung wird die dichtende Befestigung des Membranteils als sehr aufwendig empfunden. Um die Dichtwirkung sicherzustellen, sind die Randbereiche des Membranteils unter Zwischenschaltung einer Leiste mit einer Vielzahl von Schrauben an den Schenkeln des U-Profils befestigt. Eine solche Befestigung ist an beiden Längsseiten dieses Distanzteils vorzunehmen.Such a washing device is known for example from DE-OS 30 05 469. In this known washing device, the spacer part is formed in the form of a U-profile, the membrane part covering the opening of the U-profile in a cross-sectional illustration. In this known washing device, the edge areas of the membrane part are fastened in a sealed manner on legs of the U-profile. In this washing device, the sealing attachment of the membrane part is perceived as very complex. In order to ensure the sealing effect, the edge areas of the membrane part are fastened to the legs of the U-profile with a plurality of screws with the interposition of a strip. A such attachment is to be made on both long sides of this spacer.

Ausgehend von dem vorbeschriebenen Stand der Technik stellt sich der Erfindung die Aufgabe, die bekannte Wascheinrichtung so auszugestalten und weiterzubilden, daß eine herstellungstechnisch einfache und gebrauchsgünstige Ausbildung des Andruckelementes gegeben ist.Starting from the above-described prior art, the object of the invention is to design and further develop the known washing device in such a way that the pressing element is simple and easy to use in terms of production.

Diese Aufgabe ist bei der im Anspruch 1 angegebenen Erfindung gelöst.This object is achieved in the invention specified in claim 1.

Erfindungsgemäß ist das Distanzteil nach Art eines Kulissensteines in einem Halterungsteil aufgenommen. Die Randbereiche des Membranteils, zumindest die längsseitigen Randbereiche, sind zwischen dem Distanzteil und dem Halterungsteil dichtend eingespannt. Genauer sind die Randbereiche zwischen den Führungsüberständen des Halterungsteils und den zugeordneten Randbereichen des Distanzteils eingespannt. Wie bei der bekannten Wascheinrichtung dient das Distanzteil zur Ausbildung eines geschlossenen Druckraumes auf der beispielsweise einem Gummituchzylinder abgewandten Seite des Membranteils, d. h. auf der Unterseite des Membranteils, wobei das Distanzteil den Boden des Druckraumes bildet, sowie als ein das Membranteil gleichsam aufspannendes Teil, das im betätigten Zustand durch die Halterung der Randbereiche die Auswölbung des Membranteils ermöglicht. Darüber hinaus dient beim Gegenstand der Erfindung aber das Distanzteil unmittelbar zur halternden Einspannung der Randbereiche des Membranteils, wie vorstehend beschrieben. Das Andruckelement erstreckt sich im wesentlichen über die Länge der zu reinigenden Walze oder des zu reinigenden Zylinders, so daß mit den erwähnten längsseitigen Randbereichen diejenigen angesprochen sind, die sich im wesentlichen parallel zu der Achse der Walze bzw. des Zylinders erstrecken. Bei einer solchen Ausgestaltung kann das Distanzteil vorteilhaft als Einschubteil ausgebildet sein, desgleichen das Membranteil, das mit entsprechenden Randbereichen vorgeformt sein kann. Das Membranteil kann zusammen mit dem Distanzteil in das Halterungsteil eingeschoben werden und im eingeschobenen Zustand sodann verspannt werden. Das Membranteil weist zweckmäßigerweise vorgeformte, nach außen weisende Randbereiche auf, die bei einem Einschieben selbsttätig die Führungsüberstände des Halterungsteils hintergreifen. Das Membranteil ist sogleich beim Einschieben in das Halterungsteil - was im übrigen auch auf das Distanzteil zutrifft - senkrecht zur Einschubrichtung formschlüssig in dem Halterungsteil gefaßt. Die Erfindung schlägt weiter vor, daß das Distanzteil mittels sich an dem Halterungsteil abstützender Spannschrauben gegen die Führungsüberstände des Halterungsteils vorgespannt ist. Zwischen dem Halterungsteil und dem Distanzteil, unter Zwischenschaltung des Membranteils, ist ein geschlossener Verspannungskreis gegeben, wobei die wesentlichen längsseitigen Ränder des Membranteils und des Halterungsteils einerseits sowie des Distanzteils andererseits formschlüssig zusammenwirken. Das Membranteil braucht grundsätzlich nicht, oder nur geringfügig, etwa hinsichtlich der Randbereiche vorgeformt zu sein. Dann ist das Distanzteil maßgebend für die Formgebung des Membranteils im unbetätigten Zustand, wenn kein Druckluftpolster zwischen dem Membranteil und dem Distanzteil aufgebaut ist, wie dies weiter unten noch im Einzelnen erläutert ist. Im betätigten Zustand ist das Distanzteil dann für die Ausbildung einer das Waschtuch beispielsweise an den Gummituchzylinder anpressenden Wölbung verantwortlich. Jedoch kann das Membranteil auch, wie bevorzugt im Rahmen der Erfindung, durch eine Prägung an die Form des Distanzteils bereits weitgehend angepaßt sein, insbesondere hinsichtlich der zuvor erwähnten seitlich auskragenden Randbereiche, welche als Dichtung zwischen dem Distanzteil und dem Halterungsteil eingespannt werden. Das Distanzteil ist mittels der Spannschrauben in einer Richtung senkrecht zu einer Erstreckungsrichtung der längsseitigen Führungsüberstände beaufschlagt. Hierbei wirken die Spannschrauben in einer Querschnittsdarstellung etwa mittig auf das Distanzteil ein. Das Membranteil besteht wegen der notwendigen Elastizität aus einem gummielastischen Werkstoff, während das Distanzteil und das Halterungsteil etwa gezogene Metall-Profilteile sein können. Zur Betätigung des Andruckelementes wird das Membranteil pneumatisch aufgebläht. Hierzu ist ein Druckluftanschluß an dem Distanzteil vorgesehen, welcher das Halterungsteil frei durchsetzt, mit dem Distanzteil aber fest verbunden ist. Beim Verspannen des Distanzteils gegen das Halterungsteil kann der in dem Halterungsteil ortsfeste Druckluftanschluß sich bezüglich des Halterungsteils frei bewegen. Der Druckluftanschluß mündet in einer entsprechenden Bohrung in dem Distanzteil. Durch Aufbau eines Druckluftpolsters wird bei der Betätigung das Membranteil von dem Distanzteil abgehoben, wie erwähnt unter Ausbildung einer Wölbung. Das außenseitig über das Membranteil laufende Waschtuch wird hierbei an den zu waschenden Zylinder bzw. an die zu waschende Walze angepreßt. Hinsichtlich der stirnseitigen Befestigung des Membranteils ist vorgesehen, daß das Membranteil an einer Stirnseite des Distanzteils fest angebracht ist. Beispielsweise kann das Membranteil mit der Stirnseite des Distanzteils mittels Befestigungsschrauben verbunden sein. Es ergibt sich hierdurch eine vorteilhafte Ergänzung zu dem Erfindungsgedanken, das Membranteil beidseitig zwischen dem Halterungsteil und dem Distanzteil dichtend einzuspannen, bei insgesamt kulissensteinartiger Ausbildung des Distanzteils. Das Membranteil kann zur Montage vor Einschub des Distanzteils fest mit dem Distanzteil durch die stirnseitige Halterung verbunden werden. Das Distanzteil kann sodann bei einfacher Handhabung zusammen mit dem Membranteil in das Halterungsteil eingeschoben werden. Nach Anziehen der Spannschrauben ist das Membranteil insgesamt abgedichtet an dem bzw. gegen das Distanzteil gehaltert. In weiterer Einzelheit ist hinsichtlich der stirnseitigen Befestigung zwischen dem Membranteil und den Köpfen der Befestigungsschrauben ein Spannblech zwischengeschaltet, das für einen gleichmäßigen Anlagedruck über die Breite der Stirnseite sorgt.According to the invention, the spacer is accommodated in a holder part in the manner of a sliding block. The edge regions of the membrane part, at least the longitudinal edge regions, are tightly clamped between the spacer part and the holding part. More precisely, the edge areas are clamped between the guide projections of the holding part and the assigned edge areas of the spacer part. As in the known washing device, the spacer is used to form a closed pressure chamber on the side of the membrane part facing away from, for example, a rubber blanket cylinder, i.e. on the underside of the membrane part, the spacer forming the bottom of the pressure chamber, and as a part which, as it were, spans the membrane part actuated state by the holder of the edge areas allows the bulging of the membrane part. In addition, in the subject matter of the invention, the spacer is used directly for holding the edge regions of the membrane part, as described above. The pressure element extends essentially over the length of the roller or cylinder to be cleaned, so that the longitudinal edge regions mentioned address those which extend essentially parallel to the axis of the roller or cylinder. With one The spacer part can advantageously be designed as an insertion part, as can the membrane part, which can be preformed with corresponding edge regions. The membrane part can be inserted into the holding part together with the spacer part and then clamped in the inserted state. The membrane part expediently has preformed, outwardly facing edge regions which automatically engage behind the guide projections of the holding part when inserted. The membrane part is immediately in the holder part perpendicular to the direction of insertion when inserted into the holder part - which also applies to the spacer. The invention further proposes that the spacer is pretensioned against the guide projections of the holding part by means of tensioning screws which are supported on the holding part. Between the holder part and the spacer part, with the interposition of the membrane part, there is a closed tension circuit, the essential longitudinal edges of the membrane part and the holder part on the one hand and the spacer part on the other hand interacting positively. The membrane part does not need to be preformed, or only slightly, for example with regard to the edge regions. Then the spacer is decisive for the shape of the membrane part in the unactuated state if no compressed air cushion is built up between the membrane part and the spacer, as will be explained in more detail below. In the actuated state, the spacer is then responsible for the formation of a curvature that presses the washcloth onto the blanket cylinder, for example. However, as preferred within the scope of the invention, the membrane part can already be largely adapted to the shape of the spacer part, in particular with regard to the aforementioned laterally projecting edge regions which are clamped in as a seal between the spacer part and the holding part. The spacer is by means of the clamping screws in a direction perpendicular to an extension direction of the longitudinal guide projections. Here, the clamping screws act in a cross-sectional view approximately in the middle of the spacer. Because of the necessary elasticity, the membrane part consists of a rubber-elastic material, while the spacer part and the holding part can be, for example, drawn metal profile parts. The membrane part is inflated pneumatically to actuate the pressure element. For this purpose, a compressed air connection is provided on the spacer, which passes freely through the holding part, but is firmly connected to the spacer. When the spacer part is braced against the holding part, the compressed air connection which is stationary in the holding part can move freely with respect to the holding part. The compressed air connection opens into a corresponding hole in the spacer. By building up a compressed air cushion, the membrane part is lifted from the spacer part when actuated, as mentioned to form a curvature. The wash cloth running outside on the membrane part is pressed against the cylinder to be washed or the roller to be washed. With regard to the frontal fastening of the membrane part, it is provided that the membrane part is fixedly attached to an end face of the spacer part. For example, the membrane part can be connected to the end face of the spacer part by means of fastening screws. This results in an advantageous addition to the inventive concept of sealingly clamping the membrane part on both sides between the holding part and the spacer part, with the spacer part being designed in the manner of a sliding block. For assembly, the membrane part can be firmly connected to the spacer part by the end bracket before the spacer part is inserted. The spacer can then be pushed into the holding part together with the membrane part in a simple manner. After tightening the clamping screws, the membrane part is sealed on the whole or held against the spacer. In a further detail, a tensioning plate is interposed between the membrane part and the heads of the fastening screws with regard to the end-face fastening, which ensures a uniform contact pressure over the width of the end face.

Nachstehend ist die Erfindung noch desweiteren anhand der beigefügten Zeichnung, die jedoch lediglich ein Ausführungsbeispiel darstellt, erläutert. Hierbei zeigt:

Fig. 1
eine Seitenansicht der Einrichtung im eingebauten Zustand;
Fig. 2
eine Darstellung gemäß Fig. 1, bei betätigtem Andruckelement;
Fig. 3
gleichfalls eine Darstellung der Wascheinrichtung bei betätigtem Andruckelement, mit einer Schnittdarstellung des Andruckelementes;
Fig. 4
eine Schnittdarstellung des Andruckelementes im Bereich des Druckluftanschlusses, bei unbetätigtem Andruckelement;
Fig. 5
eine perspektivische Darstellung des Membranteils;
Fig. 6
eine Detaildarstellung der stirnseitigen Befestigung des Membranteils;
Fig. 7
ein Schnitt durch die Darstellung gemäß Fig. 6 entlang der Linie VII-VII, wobei jedoch lediglich das Distanzteil mit dem daran befestigtem Membranteil dargestellt ist.
The invention is further explained below with reference to the accompanying drawing, which, however, only represents an exemplary embodiment. Here shows:
Fig. 1
a side view of the device in the installed state;
Fig. 2
a representation of Figure 1, with the pressure element actuated.
Fig. 3
likewise a representation of the washing device when the pressure element is actuated, with a sectional representation of the pressure element;
Fig. 4
a sectional view of the pressure element in the region of the compressed air connection, with the pressure element not actuated;
Fig. 5
a perspective view of the membrane part;
Fig. 6
a detailed view of the frontal attachment of the membrane part;
Fig. 7
a section through the representation of FIG. 6 along the line VII-VII, but only the spacer with the membrane part attached to it is shown.

Dargestellt und beschrieben ist eine Wascheinrichtung 1, die im Einbauzustand, wie in den Fig. 1 bis 3 dargestellt, einem Gummituchzylinder 2 einer Druckmaschine zugeordnet ist. Die Wascheinrichtung 1 besitzt eine Vorratsspule 3 für ein Waschtuch 5, das auf einer Schmutztuchspule 4 aufgewickelt werden kann. Die Schmutztuchspule 4 ist mittels einer pneumatischen Vorrichtung 6 schrittweise betätigbar. Aus einer Spendeeinrichtung 7 kann das Waschtuch 5 mit Waschflüssigkeit benetzt werden.Shown and described is a washing device 1 which in the installed state, as shown in FIGS. 1 to 3, is assigned to a blanket cylinder 2 of a printing press. The washing device 1 has a supply spool 3 for a wash cloth 5, which can be wound up on a dirty cloth spool 4. The dirty cloth spool 4 can be actuated step by step by means of a pneumatic device 6. The wash cloth 5 can be wetted with washing liquid from a dispensing device 7.

Im übrigen ist die dargestellte Wascheinrichtung 1 als Einschubeinrichtung ausgebildet, die mittels Bolzen 8 in einander gegenüberliegenden maschinenfesten Halterungen 22 gehalten ist, wobei eine jeweilige Halterung 22 fest mit einer Seitenwand 28 der Druckmaschine verbunden ist.Otherwise, the washing device 1 shown is designed as a slide-in device which is held by means of bolts 8 in mutually opposite machine-fixed holders 22, a respective holder 22 being firmly connected to a side wall 28 of the printing press.

Das Waschtuch 5 wird durch das Aufwickeln auf der Schmutztuchspule 4 über ein Andruckelement 9 gezogen, das in den Fig. 2 und 3 im betätigten Zustand dargestellt ist. Im einzelnen weist das Andruckelement 9 ein Membranteil 10 auf, das abgedichtet auf einem Distanzteil 11 gefaßt ist. Mittels eines Druckluftanschlusses 12 (vergl. Fig. 4) kann zwischen der außenseitigen Oberseite 13 des Distanzteils 11 und der zugewandten Unterseite des Membranteils 10 ein Druckluftpolster aufgebaut werden, zum Anpressen des Waschtuches 5 gegen einen Zylinder oder eine Walze während eines Waschvorganges. Das Membranteil 10 liegt bei dem dargestellten Ausführungsbeispiel an der im wesentlichen rechteckigen ebenen Außenfläche des Distanzteils 11 an. Im betätigten Zustand wölbt sich das Membranteil 10 vor, wie dies in Fig. 3 dargestellt ist.The washcloth 5 is pulled by winding it on the dirty-cloth spool 4 via a pressure element 9, which is shown in FIGS. 2 and 3 in the actuated state. In particular, the pressure element 9 has a membrane part 10, which is sealed on a spacer 11. By means of a compressed air connection 12 (see FIG. 4), a compressed air cushion can be built up between the outside upper side 13 of the spacer part 11 and the facing underside of the membrane part 10, for pressing the washcloth 5 against a cylinder or a roller during a washing process. In the exemplary embodiment shown, the membrane part 10 lies against the substantially rectangular, flat outer surface of the spacer part 11. In the actuated state, the membrane part 10 bulges out, as shown in FIG. 3.

Das Distanzteil 11 und das Membranteil 10 sind in einem Halterungsteil 14 kulissensteinartig aufgenommen. Die Führungsüberstände 15,15' des Halterungsteils sind von Randbereichen 16 und 17 des Distanzteils 11 bzw. des Membranteils 10 hintergriffen. Mittels Spannschrauben 18, die sich an dem Halterungsteil 14 abstützen, ist das Distanzteil 11 gegen die Führungsüberstände 15,15' verspannt, unter Zwischenlage des Membranteils 10 bzw. genauer der Randbereiche 17 des Membranteils 10. Das Distanzteil 11 ist hierbei mittels der Spannschrauben 18 senkrecht zu einer Erstreckungsrichtung der Führungsüberstände 15,15' beaufschlagt. In der Querschnittsdarstellung gemäß Fig. 3 ist ersichtlich, daß die Spannschrauben 18 etwa mittig auf das Distanzteil 11 einwirken. Das Membranteil 10 besitzt vorteilhafterweise vorgeformte, nach außen weisende Randbereiche 17. Es kann - genau wie das Distanzteil 11 - zur Montage einfach in das Halterungsteil 14 eingeschoben werden. Der Führungsüberstand 15' kann weiter vorragend in Richtung auf den Gummituchzylinder 2 ausgebildet sein (vgl. Fig. 2), zur Führung bzw. Umlenkung des Waschtuchs 5.The spacer 11 and the membrane part 10 are received in a bracket part 14 like a sliding block. The guide projections 15, 15 'of the holding part are engaged behind by edge regions 16 and 17 of the spacer part 11 and the membrane part 10, respectively. The spacer 11 is braced against the guide projections 15, 15 'by means of tensioning screws 18, which are supported on the holding part 14, with an intermediate layer of the membrane part 10 or more precisely the edge regions 17 of the membrane part 10. The spacer part 11 is in this case acted upon by means of the tensioning screws 18 perpendicular to an extension direction of the guide projections 15, 15 '. 3 that the clamping screws 18 act approximately centrally on the spacer 11. The membrane part 10 advantageously has preformed, outwardly facing edge regions 17. Just like the spacer part 11, it can simply be pushed into the mounting part 14 for assembly. The guide protrusion 15 ′ can be designed to protrude in the direction of the blanket cylinder 2 (see FIG. 2) for guiding or deflecting the washcloth 5.

Der Druckluftanschluß 12 ist im einzelnen in Fig. 4 dargestellt. Er durchsetzt frei einen Durchlaß 19 in dem Halterungsteil 14 und ist mittels eines Gewindes 20 in dem Distanzteil 11 verschraubt. Bei der Montage, beim Verspannen des Distanzteils 11 gegen die Führungsüberstände 15,15' wandert das Distanzteil 11 in Richtung auf die Führungsüberstände 15,15'. Diese Bewegung kann der Druckluftanschluß ohne weiteres mitvollziehen. Der Druckluftanschluß 12 ist desweiteren mit einer Druckluftleitung 21 verbunden, die zur Versorgung mit Druckluft aus der Wascheinrichtung 1 herausgeführt ist, was hier im einzelnen nicht dargestellt ist.The compressed air connection 12 is shown in detail in FIG. 4. It passes freely through a passage 19 in the holding part 14 and is screwed into the spacer 11 by means of a thread 20. During assembly, when the spacer 11 is braced against the guide projections 15, 15 ', the spacer 11 migrates in the direction of the guide projections 15, 15'. The compressed air connection can easily follow this movement. The compressed air connection 12 is also connected to a compressed air line 21 which is led out of the washing device 1 for the supply of compressed air, which is not shown in detail here.

In Fig. 5 ist das Membranteil 10, das aus einem gummielastischen Werkstoff besteht, insgesamt perspektivisch dargestellt. Es sind die nach außen weisenden längsseitigen Randbereiche 17 zu erkennen. Die Stirnseite 23 des Membranteils 10 ist um den Überstand 27 tiefer gezogen als der längsseitige Rand des Membranteils 10. Weiter sind bei dem dargestellten Ausführungsbeispiel in der Stirnseite 23 zwei Befestigungsöffnungen 24 ausgebildet, um eine Schraubverbindung zu ermöglichen, wie dies weiter im einzelnen in den Fig. 6 und 7 dargestellt ist. Die in Fig. 5 nicht sichtbare Stirnseite ist entsprechend ausgebildet.5, the membrane part 10, which consists of a rubber-elastic material, is shown overall in perspective. The outward-facing longitudinal edge regions 17 can be seen. The end face 23 of the membrane part 10 is drawn deeper by the projection 27 than the longitudinal edge of the membrane part 10. Furthermore, in the illustrated embodiment, two fastening openings 24 are formed in the end face 23 in order to enable a screw connection, as further described in detail in FIGS 6 and 7 is shown. The end face that is not visible in FIG. 5 is designed accordingly.

Aus den Fig. 6 und 7 ist ersichtlich, daß die stirnseitige Befestigung des Membranteils 10 mittels zweier Schrauben 25 durchgeführt ist, die in dem Distanzteil 11 verankert sind. Die Schrauben 25 wirken über ein die Stirnseite überspannendes Spannblech 26 auf das Membranteil 10 ein. Es ergibt sich eine über die ganze Stirnseite dichte Anlage des Membranteils 10 an dem Distanzteil 11.6 and 7 that the frontal fastening of the membrane part 10 is carried out by means of two screws 25 which are anchored in the spacer 11. The screws 25 act on the diaphragm part 10 via a tensioning plate 26 spanning the end face. This results in a tight contact of the membrane part 10 with the spacer part 11 over the entire end face.

Zur Montage kann beispielsweise so vorgegangen werden, daß das Membranteil 10 zunächst an der Stirnseite 23 mit dem Distanzteil 11 fest verbunden wird und das Distanzteil 11 sodann zusammen mit dem daran insoweit schon befestigten Membranteil 10 in das Führungsteil 14 eingeschoben wird. Durch das erwähnte Verspannen des Distanzteils 11 gegen die Führungsüberstände 15, 15' ergibt sich der längsseitige dichtende Abschluß zwischen dem Membranteil 10 und dem Distanzteil 11.For assembly, for example, the procedure can be such that the membrane part 10 is first firmly connected to the spacer 11 on the end face 23 and the spacer 11 is then inserted into the guide part 14 together with the membrane part 10 already attached to it. The aforementioned tensioning of the spacer 11 against the guide projections 15, 15 ′ results in the longitudinal sealing seal between the membrane part 10 and the spacer 11.

Die in der vorstehenden Beschreibung, den Ansprüchen und den Zeichnungen offenbarten Merkmale der Erfindung können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung von Bedeutung sein.The features of the invention disclosed in the above description, the claims and the drawings can be of importance both individually and in any combination for the implementation of the invention.

Claims (7)

  1. Washing device (1) on a printing press for cleaning the surface of a roller or cylinder, for example for cleaning the rubber blanket of the rubber blanket cylinder (2), having a supply reel (3) and a dirt blanket reel (4) for a washing blanket (5) which can be steeped in washing liquid, which washing blanket (5) can be drawn from the supply reel (3), by being wound up on the dirt blanket reel (4), over an actuatable pressure element (9) to enable the washing blanket (5), during a washing procedure, to be pressed by means of the pressure element (9) against the rubber blanket cylinder (2), the pressure element (9) exhibiting an elastic membrane part (10), which is sealed in relation to a distancing part (11) and can be actuated by the formation of a compressed-air cushion between the membrane part (10) and the distancing part (11), characterised in that the distancing part (11) is received like a sliding block in a holding part (14) and in that marginal regions (17) of the membrane part (10), which marginal regions back-grip guide projections (15) of the holding part (14), are clamped sealingly in place by bracing of the distancing part (11) against the guide projections (15).
  2. Washing device according to Claim 1, characterised in that the distancing part (11) is pretensioned, by means of clamping screws (18) supported on the holding part (14), against the guide projections (15) of the holding part (14).
  3. Washing device according to one or more of the preceding claims, characterised in that the distancing part (11) is acted upon, by means of the clamping screws (18), in a direction perpendicular to a direction of extent of the guide projections (15).
  4. Washing device according to one or more of the preceding claims, characterised in that a compressed-air connection (12) passes through the holding part (14) and is firmly connected to the distancing part (11).
  5. Washing device according to one or more of the preceding claims, characterised in that the membrane part (10) is attached, at its end faces (23), firmly to the distancing part (11).
  6. Washing device according to one or more of the preceding claims, characterised in that the end faces (23) of the membrane part (10) are screwed to the distancing part (11).
  7. Washing device according to one or more of the preceding claims, characterised in that the membrane part (10) consists of an elastomeric material.
EP90103286A 1989-03-20 1990-02-21 Washing device Expired - Lifetime EP0388646B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3909114 1989-03-20
DE3909114A DE3909114C2 (en) 1989-03-20 1989-03-20 Actuator acted upon by pressure medium for placing a washcloth on a washing device of a printing press

Publications (3)

Publication Number Publication Date
EP0388646A2 EP0388646A2 (en) 1990-09-26
EP0388646A3 EP0388646A3 (en) 1991-04-10
EP0388646B1 true EP0388646B1 (en) 1993-08-11

Family

ID=6376774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90103286A Expired - Lifetime EP0388646B1 (en) 1989-03-20 1990-02-21 Washing device

Country Status (5)

Country Link
US (1) US5012739A (en)
EP (1) EP0388646B1 (en)
JP (1) JPH0649372B2 (en)
CA (1) CA2010494C (en)
DE (2) DE3909114C2 (en)

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Also Published As

Publication number Publication date
CA2010494C (en) 1992-09-22
DE3909114A1 (en) 1990-09-27
EP0388646A3 (en) 1991-04-10
JPH0649372B2 (en) 1994-06-29
CA2010494A1 (en) 1990-09-20
DE3909114C2 (en) 1994-06-01
EP0388646A2 (en) 1990-09-26
JPH02279339A (en) 1990-11-15
US5012739A (en) 1991-05-07
DE59002240D1 (en) 1993-09-16

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