EP3523124A1

EP3523124A1 - Cleaning device for the surface of a cylinder of a printer and/or copier

Info

Publication number: EP3523124A1
Application number: EP17794773.6A
Authority: EP
Inventors: Christian Göbel; Peter Ueberfuhr
Original assignee: Ideego GmbH
Current assignee: Ideego GmbH
Priority date: 2016-10-07
Filing date: 2017-10-04
Publication date: 2019-08-14
Anticipated expiration: 2037-10-04
Also published as: US10969728B2; DE102016119055A1; EP3523124B1; US20190369547A1; WO2018065907A1

Abstract

The invention relates to a cleaning device (1) for the surface (21) of a cylinder (2) of a printer and/or copier. The cleaning device has a cylindrical cleaning element (3), which can be rotated by at least one drive and has a cleaning border (31) on the outer circumference (32) of the cleaning element, and a suction unit (4, 4'), which can conduct at least one suction medium and which comprises at least one suction channel (41, 41') that is arranged on the outer circumference of the cleaning element and extends along the longitudinal direction of the cleaning element. The aim of the invention is to achieve a simple technical design with little required maintenance together with a good cleaning result and a reliable removal of dirt. According to the invention, this is achieved by a generic cleaning device in which a suction slit that extends along the suction channel and is arranged on the cleaning element opens into the suction channel tangentially to the suction channel cross-section.

Description

Cleaning device for a surface of a cylinder of a pressure and / or

copy machine

The present invention relates to a cleaning device for a surface of a cylinder of a printing and / or copying machine, wherein the cleaning device comprises a cylindrical, by at least one drive in a rotational movement displaceable and on its outer circumference a Reinigungsbesatz exhibiting cleaning element and at least one suction medium feasible suction with at least having a aligned on the outer circumference of the cleaning element and extending along the longitudinal direction of the cleaning element extending suction channel.

High speed printers and copiers are known in the art which use an electrostatically biased transfer roll to transfer charged toner particles from the surface of an exposed and developed film or photoconductor to a web of material to be printed, such as on paper. It remains on the film or photoconductor residual toner adhered to the transfer roller.

In order to prevent this residual toner is transferred to the back of the subsequent material to be printed, for example, in the document DE 102 10 806 A1 used with an engine counter to the transfer roller driven, elongated, cylindrical fiber or cleaning brush whose longitudinal axis runs parallel to the longitudinal axis of the transfer roller and stripped with the bristles toner particles and any accumulated paper dust from the transfer roller. At the fiber brush in this case a connected to a vacuum blower suction system is provided, are sucked with the recorded from the fiber brush particles. In this case, an air flow chamber is formed by the exhaust system to the fiber brush. The air flow chamber forms an air channel which encloses a part of the fiber brush and has an opening located below the contact area between the fiber brush and the transfer roller and extending along the fiber brush. The brush fibers are bent and released with the help of a flicker strip provided at the end of the opening Particles may be dropped from the fibers, taken up by the airflow and transported to a remote collection location.

In order to improve the cleaning effect of the transfer roller, DE 102 10 806 A1 proposes a variability of the distance between the axes of the fiber brush and the transfer roller and a high density of the fiber bristles of the cleaning brush. In addition, the engagement, that is, the distance between the transfer roller and the cleaning brush, which exceeds a position in which the bristles of the cleaning brush the outer surface of the transfer roller just touch as large as possible, but not too large to prevent slipping or blocking the To effect transfer roller.

In order to improve the cleaning effect on a cylindrical surface in a printing machine, the document DE 103 46 659 B3 proposes a cleaning device with a brush roller with a cross-sectionally oval or elliptical brush stocking or with an eccentrically rotatable brush roller. In addition, the brush roller should be changeable in the axial direction. It is also considered to be advantageous for the cleaning effect if the bristle stock extending over the roll width has bristles of different elasticity arranged in zones in the circumferential direction. In addition, a cleaning fluid and / or water can be sprayed on the brush roller via spray tubes in order to increase the cleaning effect. In addition, a doctor blade engages in the brush roller.

It is the object of the present invention to provide a cleaning device for cylinders of a printing and / or copying machine which, in addition to a good cleaning result and reliable removal of dirt, also has a simple technical structure and low maintenance.

The object is achieved by a cleaning device for a surface of a cylinder of a printing and / or copying machine, wherein the cleaning device with at least one cylindrical, by at least one drive in a rotary movement displaceable and on its outer periphery a Reinigungsbesatz exhibiting cleaning element and at least one suction medium feasible suction one aligned on the outer periphery of the cleaning element and extending along the longitudinal direction of the cleaning element extending suction channel, solved, in the in the suction channel at least one extending along the suction channel, aligned with the cleaning element suction port opens tangentially to Absaugkanalquerschnitt.

In the present invention, the suction is arranged on the cleaning element which cleans a cylindrical printing or copying roller of the printing or copying machine and which is preferably arranged parallel to the printing or copying roller to be cleaned. Advantageously, sucked through the suction of the cleaning element by the pressure roller particles and the cleaning media used for cleaning steadily or intermittently, whereby the cleaning element and the printing or copy roller can be kept clean and thus again a high quality print result can be generated.

The cleaning element, which frees the printing or copying roller of paint residues and other particles, is preferably in the form of a cylindrical brush, which extends over the entire length of the printing or copying roller. The diameter of the brush may for example be in a range of 2 cm to 15 cm. The brush used usually has a brush body with a brush trim. In this case, the brush body made of wood, plastic or metal and the brush trim can be formed from animal hair, natural fiber, plastic or chemical fibers.

In alternative embodiment variants of the cleaning device according to the invention, the cleaning element can also be formed from a plurality of brushes arranged one after the other in the brush longitudinal direction. The individual brushes may have the same and / or different properties, for example, the individual brushes may have different diameters or be made of different materials. For example, the cleaning element can also have a rod-shaped body with a varying diameter. Furthermore, the cleaning element may also have cleaning tabs, nonwovens or the like at its periphery for cleaning the cylinder of the printing and / or copying machine instead of bristles.

The cleaning element can be set by the drive in a rotary motion, whereby the printing or copy roller can be cleaned very thoroughly. The cleaning process of the cylinder of the printing or copying machine, for example the printing or copying roller, can take place during, after and / or immediately before the start of a printing or copying process.

Advantageously, the suction is arranged in the immediate vicinity of the cleaning element, so that the removed from the pressure roller color and dirt particles and any cleaning medium optionally used in addition to cleaning the pressure roller can be sucked easily and almost residue-free. For this purpose, the suction has, in the present invention, a suction slot extending along the suction channel and opening into the suction channel. This intake slot is aligned tangentially to Absaugkanalquerschnitt on the cleaning element. The polluted by the suction through the suction slot from the surface of the cleaning element impurities and / or cleaning media are forwarded to the suction and from there into a disposal and / or treatment device. The suction channel is for sucking dirt, including polluted cleaning liquid, air, paint, particles, emulsions and the like, coupled with an exhaust system. For this purpose, a corresponding extraction tract connects to the suction channel. The sucked dirt thus passes first through the intake slot, then into the suction and then into the suction.

According to the invention, a first end of the suction slot is thus aligned with the cleaning element, whereas a second end of the suction slot opens tangentially to a suction channel cross-section in the suction channel.

In this case, it has turned out to be particularly advantageous if the suction channel is tubular, is arranged parallel next to the brush-like cleaning element or to the printing or copying roller and extends over the entire length of the cleaning element or the pressure roller. In such an embodiment variant of the suction channel, the suction slot preferably extends over the entire length of the suction channel and is aligned in the direction of the cleaning element or the pressure roller so that soiling and / or cleaning media can be extracted particularly thoroughly by the cleaning element or the pressure roller. Such a configuration of suction channel and suction slot leads to a particularly advantageous eddy current formation within the suction channel, whereby dirt particles, cleaning media and the like can be sucked particularly well by the cleaning element and / or the pressure roller.

In further embodiments of the cleaning device according to the invention also several successively arranged suction slots may be provided on the suction channel. In addition, the suction channel also need not be tubular, but may for example be designed with an angular inner cross section.

With the cleaning device according to the invention, a particularly good cleaning result of the cylinder of the printing and / or copying machine can be achieved. In addition, the cleaning element according to the invention increases its maintenance intervals and at the same time minimizes its maintenance expenditure. This is also reflected in the maintenance of the printing and / or copying cylinder. The individual components of the cleaning device according to the invention are protected by the suction of impurities, whereby a lower spare parts requirement is required.

In an embodiment variant of the cleaning device according to the invention, the suction channel has an inner cross-section which widens outwards on both sides in its longitudinal orientation. By enlarging the inner cross section to a first and a second end of the suction out, there is an additional suction effect, whereby the cleaning element is sucked particularly advantageous and the cylinder of the printing and / or copying machine can be cleaned very thoroughly.

In a tubular embodiment of the suction channel, it has proven to be advantageous if the tube increases conically towards the first and the second end of the tube. In principle, the tube diameter can also be reduced in steps to the first and the second end of the tube. A step-like enlargement of the inner cross-section of the suction channel to the outside is also possible when the suction channel has no round, but a square inner cross-section. It has also proven to be advantageous if at least one of the suction slot forming, along the suction channel projecting from this webs of flexible material is formed. Such a flexible embodiment of the intake slot allows easy cleaning of the intake slot in the event of a blockage by, for example, very large sucked particles and at the same time prevents very rapid clogging of the intake slot by larger particles. The webs can be folded away due to their flexible training, for example in case of contamination and the pollution, such as particles or the like, are removed from the intake slot.

In a particular embodiment of the intake slot, the webs of the intake slot are preferably formed as separate elements and connected to the suction channel. For example, the webs of the intake slot may be formed of rubber, rubber or flexible plastic membranes.

If a rod or an inner tube not flowed through by the suction medium runs centrally through the suction channel, the suction medium sucked from the suction slot can be diverted particularly well through the suction channel in the direction of a disposal and treatment device of the cleaning device by a favorable eddy current formation around the rod or inner tube , The diameter of the rod or inner tube may for example be between 1 cm and 10 cm.

Depending on the embodiment of the cleaning device according to the invention, the rod or the inner tube can be permanently introduced into the suction channel or can be introduced into the suction channel and removed again. The rod or the inner tube may be formed, for example, of plastic or metal. The rod or the inner tube may be rectilinear, with a smooth surface or helically wound.

For a particularly favorable forwarding of the suctioned through the suction medium through the suction channel in the direction of a disposal and treatment device of the cleaning device according to the invention, it has also proved to be beneficial if at least one flow baffle is provided in the suction duct in addition to a suction connected to a suction suction section of the suction , The flow guide plate can, for example, be provided between an inner wall of the suction channel and a rod or inner tube provided in the interior of the suction channel. be seen, so that the sucked medium can flow only in one direction around the rod or the inner tube around, whereby a particularly favorable eddy current forms in the interior of the suction channel.

The flow baffle may be formed of the same material as the suction channel or a material different from the material of the suction channel. Further, the flow baffle may be integrally formed with the suction channel or permanently or temporarily attached to the suction channel.

For a particularly efficient extraction of the cleaning element and an associated effective cleaning of the cylinder of the printing and / or copying machine is preferably provided next to the suction and along the suction channel at least one aligned on the cleaning element and umströmbare from the suction medium doctor.

The squeegee serves to wipe off the surface of the cleaning element, wherein typically the cleaning element is moved relative to the squeegee and the squeegee dissolves particles and liquids adhering to the cleaning element, for example paint residues, cleaning agents, water and other fluidic media used in the ducking or copying process, which are then sucked through the suction.

In a special embodiment of the cleaning device according to the invention, the doctor blade is rod-shaped, but in alternative variants can also be plate-shaped, band-shaped or block-shaped.

Depending on the nature of the cleaning element, the doctor blade can be made of rubber, metal or plastic. It can only be a doctor or it can be provided along the cleaning element several doctor blades.

It has turned out to be particularly favorable when the doctor is positionally variable within a guide relative to the cleaning element.

The guide advantageously extends parallel to the entire length of the cleaning element, so that all areas of the cleaning element can be reached and cleaned. Such attachment of the doctor blade to the cleaning device has proven itself in particular with regard to a brush-shaped configuration of the cleaning element, as this way the complete cleaning element can be effectively cleaned.

The squeegee may be oriented perpendicular to a peripheral surface of the cleaning element or at an angle to the peripheral surface of the cleaning element. Advantageously, the angle at which the doctor blade is aligned with the cleaning element can also be varied.

For easy replacement and / or easy cleaning and maintenance of the doctor blade, it has proved to be particularly advantageous if the doctor blade can be removed from the guide and stored again in this position. However, the squeegee can also be permanently installed in the guide.

Moreover, it is advantageous if the doctor blade is linearly adjustable radially or in an angular position relative to the axis of rotation of the cleaning element.

A delivery or removal of the doctor in the direction of the cleaning element allows, for example, that the doctor can be used even when using differently shaped cleaning elements, for example, brushes with different diameters, or different cleaning stock. Furthermore, the position of the doctor blade in the radial direction of the cleaning element can also be positioned or changed in position as a function of wear of the cleaning element or its cleaning stock and / or for procedural reasons during the cleaning process.

In a very particularly preferred embodiment variant of the cleaning device according to the invention, a squeegee channel is provided on each side of the squeegee. By attaching two suction channels, the suction power of the cleaning device and thus the cleaning result can be improved. In addition, the attachment of the second suction channel also results in a second suction direction for the suction medium to be suctioned off, as a result of which particles or the like which would not be absorbed by the suction effect of the first suction channel are sucked in, if necessary. Advantageously, the second suction channel is designed mirror-symmetrically to the first suction channel, but in certain embodiments of the cleaning device according to the invention may also have a different shape and / or dimensions than the first suction channel. Particularly preferably, along the second suction channel, as well as along the first suction channel, an intake slot aligned with the cleaning element, which opens tangentially to the suction channel cross-section in the second suction channel, also extends.

The sucked medium flowing in the second suction channel is advantageously forwarded to the same disposal and / or treatment device with which the first suction channel is also coupled.

Preferably, the drive for the cleaning element is provided at a longitudinal end of the brush. Alternatively, however, the cleaning element can also be set in rotation by two drives provided on both sides of the breasts or by a coupling of the brush to the drive of the pressure roller. For a particularly thorough cleaning, the cleaning element rotates advantageously in the opposite direction to the cylinder to be cleaned, but can also rotate in the same direction with the pressure roller.

In particular, in a tubular embodiment of the cleaning element, it has proved to be particularly advantageous if the at least one drive provided within the cleaning element and attached to a machine wall of the printing and / or copying machine, since the drive can be provided so particularly space-saving.

Conveniently, two drives for the cleaning element can also be provided in the cleaning element, which are fastened to mutually opposite machine walls of the printing and / or copying machine. Such a configuration allows a particularly efficient drive of the cleaning element. Since the inner diameter of the cleaning element is limited, in this embodiment of the invention, engines with a small diameter and thus with less power can be used as a drive, since the engine power is doubled compared to only one engine by the two engines. For effective cleaning, it has also proved to be advantageous if the cleaning device has a moistening device with at least one spray bar extending along the suction channel. By the spray bar, the cleaning element and / or the cylinder of the printing and / or copying machine can be acted upon with a cleaning medium, which supports the cleaning process. By spraying the cleaning medium in particular dried or only very difficult to access paint residues can be easily removed. In addition, the spraying of the cleaning medium supports the cleaning of the cylinder (s) of the printing and / or copying machine chemically / physically, such as the chemical / physical dissolving of paint residues and / or the emulsification of particles and other solid, on the surface of the Cleaning element and / or the cylinder residues of the printing or copying process.

In this case, several individual spray nozzles or one over the entire or almost complete length of the spray bar extending spray nozzle may be provided in the spray bar. For optimal cleaning, the spray bar is aligned in the direction of the cleaning element and / or in the direction of the cylinder to be cleaned of the printing and / or copying machine. The spray nozzles can be used permanently during the entire cleaning process, intermittently or only at the beginning and / or during the cleaning process once.

In a preferred embodiment of the cleaning device according to the invention, two spray bars are provided on both sides of the suction channel, wherein the two spray bars can be identical or different.

It has proved to be particularly favorable if the moistening device has at least one first spray bar for spraying the cleaning element with water and at least one second spray bar for spraying the cleaning element with detergent, wherein the first and the second spray bar are arranged on mutually opposite sides of the suction channel ,

The separate use of water and cleaning agent eliminates mixing of the water and the cleaning agent before use. Nevertheless, it can be ensured that the desired ratio of water and cleaning agent is always used during the entire humidifying application, and For example, the mixing ratio does not change due to demixing of a pre-mixed water cleaning solution. Further, the ratio of the use of water and detergent can also be precisely controlled during the cleaning process. It is also possible, for example as a function of a previously determined degree of soiling of the cleaning element and / or the cylinder to be cleaned of the copying and / or printing machine, to temporarily use only water for cleaning or to increase or reduce the detergent feed. Of course, the ratio of water and cleaning agent, however, remain constant throughout the cleaning cycle. Likewise, it is also possible that not only water or detergent emerges from the spray bar, but a water-cleaning agent mixture or water and detergent are dispensed alternately. From the spray bar, an aerosol mixture of water and air or detergent and air or a combination thereof may be dispensed.

Inasmuch as the cleaning device according to the invention has two suction channels, it has proved to be advantageous if in each case a spray bar is provided adjacent to a suction channel, so that the two spray bars include the centrally arranged, parallel to each other suction channels. Advantageously, in such an embodiment of the cleaning device according to the invention, the guide for the doctor blade is provided parallel to the two suction channels, between the two suction channels.

In addition, in two embodiments of the device according to the invention, it is also possible to provide in each case two spray strips arranged on both sides next to a respective suction channel.

In a particularly advantageous embodiment of the cleaning device according to the invention, the cleaning device, a first module, which has the cleaning element and its drive components, and a second module having the suction, their components and the humidifier, wherein the second module of the pressure and / or copying machine can be disassembled without having to dismantle a component of the first module of the printing and / or copying machine. Due to the possibility of separate removal of the second module of the printing and / or copying machine, on the one hand the suction and the humidifier can be easily cleaned, maintained, repaired and replaced. Furthermore, the accessibility to the cleaning element and its drive components is also improved, which also makes these components easier to clean, maintain, repair and / or replace.

In a preferred embodiment of the cleaning device according to the invention, the first module can also be easily and easily dismantled from the copying and / or printing machine.

It is particularly useful if the components of the second module are provided in a common, separately from the components of the first module of the printing and / or copying device removable housing. The housing not only protects against contamination of the individual components, but also makes it possible to remove all components of the first module at once from the copying and / or printing machine, whereby the removal and installation of the first module is simplified.

Furthermore, the components of the second module can also be surrounded by a housing. It is also possible for the first and the second module to be enclosed by a common housing provided in addition to the housings of the first and second module or replacing the housings of the first and second module.

It is particularly advantageous if the second module is placed like a backpack on the first module or can be placed. In this case, at least the part of the second module which is aligned with the first module is adapted to the shape of the first module. Insofar as the cleaning element of the first module is designed like a cylinder, the first module will have a predominantly cylindrical shape, whereby the second module may expediently have a curved, semi-tubular configuration in order to be able to be placed on the first module like a backpack. Such a configuration of the second module makes it possible for the components of the second module to interact particularly efficiently with the components of the first module and for cleaning the cleaning element or the cylinder to be cleaned of the copying and / or printing machine to be particularly thorough. A preferred embodiment of the present invention, its structure, function and advantages are explained in more detail below with reference to FIG 1, wherein

Figure 1 shows schematically a variant embodiment of the cleaning device according to the invention in a sectional side view.

1 shows schematically a preferred embodiment of a cleaning device 1 according to the invention for cleaning a surface 21 of a cylinder 2 of a printing and / or copying machine not shown in detail. The cylinder 2 is a printing cylinder of a printing press in the present example.

The cleaning device 1 has a first module 10 and a second module 20, wherein the second module 20 is placed like a backpack on the first module 10. Both modules 10, 20 are attached to the printing press. In this case, the second module 20 can be removed from the printing machine without having to dismantle the first module 10.

In the exemplary embodiment shown, the first module 10 has a brush-like cleaning element 3, which has a cleaning stock 31 in the form of bristles on its outer circumference. The cleaning element 3 is rotationally driven by a drive, not shown, and guided over the surface 21 of the cylinder 2 for cleaning the surface 21 of a cylinder 2 of the printing press. For a particularly efficient cleaning of the cylinder 2, the cleaning element 3 rotates in the opposite direction to the cylinder 2. In other embodiments of the cleaning device 1 according to the invention, however, the cleaning element 3 can also be moved in the same direction with the cylinder 2 to be cleaned or stand still with respect to the moving cylinder 2 ,

As can be seen in Figure 1, the cleaning element 3 is cylindrical and aligned parallel to the cylinder 2, wherein the cleaning element 3 extends over the entire length of the cylinder 2, so that the entire cylinder circumference of the cylinder 2 can be cleaned by the cleaning element 3 of dirt , The cleaning element 3 can be formed from one or more brushes and / or have one or more cleaning tabs or cloths on its cylinder circumference. If several brushes are used as cleaning elements 3, the brushes can either be arranged one behind the other in the printing cylinder longitudinal direction or else a plurality of brushes are provided in the cylinder circumferential direction of the cylinder 2. The cleaning element 3 can in principle also be designed in the form of a bar with a varying diameter. However, it is particularly advantageous if the cleaning element 3 is adapted to the outer shape of the cylinder 2 to be cleaned, so that it can be cleaned very thoroughly.

In the exemplary embodiment shown, the drive driving the cleaning element 3 protrudes into the tubular cleaning element 3 and, on the other hand, is fastened to a machine wall of the printing machine, whereby the cleaning device 1 can be made particularly compact. In further embodiments of the cleaning device 1 according to the invention, two drives can be connected to or introduced at both ends of the cleaning element 3. In addition, the at least one drive can also be placed separately from the cleaning element 3 on the cleaning device 1.

The cleaning of the cylinder 2 can be done directly during a printing process, so that the cylinder 2, such as an impression cylinder, is continuously cleaned and a particularly high-quality printing result can be generated. In alternative embodiment variants of the cleaning device 1 according to the invention, in which the cylinder 2 to be cleaned is, for example, a blanket cylinder, the cleaning of the cylinder 2 can also take place after completion of the printing process and / or before the beginning of the printing process and / or at intervals during the printing process.

The cleaning element 3 is cleaned by the components of the second module 20 of the cleaning device 1, so that a dirt transfer from the cleaning element 3 during the cleaning process of the cylinder 2 on the cylinder 2 can be excluded. For this purpose, the second module 20, which is attached to the first module 10 in the form of a backpack, has two suction devices 4, 4 ', a doctor blade 5 and two moistening devices 6, 6'. As shown in FIG. 1, the second module 20, in particular the half of the second module 20 aligned with the first module 10, is adapted to the shape of the first module 10, in particular to the shape of the cleaning element 3.

The suction 4, 4 'each have a suction channel 41, 41', in which by a suction slot 42, 42 'located on the cleaning brush 3 dirt particles, fluids and the like are sucked. For a particularly efficient extraction, the suction channels 41, 41 'are tubular in shape tapering from the two ends of the tube to the center thereof, these extending in the brush longitudinal direction over the entire length of the brush. The suction slots 42, 42 'extend over the entire length of the respective suction channel 41, 41', wherein the suction slots 42, 42 'are provided such that they are aligned with the cleaning brush 3 and tangentially to Absaugkanalquerschnitt in the suction channel 41, 41' lead.

The intake slots 42, 42 'are formed in the embodiment shown by the respective suction channel 41, 41' projecting webs 43, 43 ', which extend along the suction channel 41, 41'. In the specific embodiment, the webs 43, 43 'are formed of a flexible material, so that a blockage of the intake slots 42, 42' avoided or can be easily eliminated. The remaining components of the cleaning device 1, however, are made of a stable, largely inflexible material, such as plastic or metal, but in other variants may also consist of other materials.

The sucked into the suction channels 41, 41 'suction medium is transported by attached to the suction channels 41, 41', not shown pipes in a common Entsorgungsund / or treatment device.

To cause the suction of the Absaugmediums the suction channels 41, 41 'are connected to a suction, not shown here. In this case, an extraction takes place simultaneously through both suction channels 41, 41 '. Likewise, via the suction channels 41, 41 ', however, independently of each other, the respective suction medium can be sucked off.

In the case of the cleaning device 1 according to the invention, a plurality of suction devices 4, 4 'or only one suction device 4, 4' can be attached to the first module 10 of the cleaning device 4, 4 '. be provided direction 1. The suction channels 41, 41 'may have a round or even an angular inner cross section. The suction slot 42, 42 may, as in the embodiment shown, over the entire length of the suction channel 41, 41 'extend or from a plurality of suction slots 42, 42', which are arranged in Absaugkanallängsrichtung one behind the other, put together.

For better eddy current formation and thus for improved media conduction, in a further embodiment variant of the cleaning device 1 according to the invention, a rod or an inner tube not flowed through by the suction medium may also be provided centrally in the tubular suction channels 41, 41 '. Furthermore, at least one flow baffle can be provided to optimize the media line within the respective suction channel 41, 41 '.

To clean the cleaning element 3, the squeegee 5 is provided in the embodiment shown between the two suction 4, 4 ', which is guided in a parallel to the longitudinal extent of the cleaning element 3 extending guide 51 and in particular stubbornly adhering dirt from the cleaning element 3 triggers, which subsequently be sucked from the suction 4, 4 '.

The doctor blade 5 is rod-shaped in the embodiment shown in the guide 51 and movable. Furthermore, an angle of attack, with which the doctor blade 5 is aligned with respect to the cleaning element 3, variable. For a particularly efficient cleaning of the cleaning element 3, in particular the position of the doctor blade 5 in the direction of the cleaning element 3 can be changed so that the doctor blade 5 can sink deeper or less deeply into the cleaning stock of the cleaning element 3. In addition, due to the movement of the doctor blade 5 towards the cleaning element 3, a possible wear of the cleaning element 3 during the cleaning process of the cylinder 2 can be compensated and the cylinder 2 can thus be cleaned with a constant cleaning quality.

In alternative embodiment variants of the cleaning device 1 according to the invention, it is also possible for a plurality of doctor blades 5 to be introduced into the guide 51. Furthermore, a plurality of guides 51 may be provided on the second module 20, which have at least one or more doctor blade 5. Also, the squeegee 5 in an alternative Embodiment of the cleaning device 1 according to the invention, for example, plate-shaped, belt-shaped or block-shaped.

In addition to the suction 4, 4 ', in the outer regions of the first module 10, in each case a humidifying 6, 6' is arranged, each of which has a spray bar 61, 61 '. The spray bars 61, 61 are aligned in the longitudinal direction of the cleaning element 3 and extend over the entire length of the cleaning element 3.

In the embodiment shown, the spray bar 61 pressurizes the cleaning element 3 with water, whereas the spray bar 61 'applies a cleaning agent to the cleaning element 3. By the displacement of the cleaning element 3 with water and detergent can be solved by the squeegee 5 and the suction 4, 4 'difficult to dissolve, dried-up dirt from the cleaning element 3.

The loading of the cleaning element 3 with water and detergent is preferably carried out continuously during the entire cleaning process, but can also be intermittently caused only at the beginning and / or intervals during the cleaning process or on the occasion of a previously determined degree of contamination of the cleaning element 3.

With the help of the spray bars 61, 61 'also detergent-water mixtures can be sprayed onto the cleaning element 3. For this purpose, the cleaning agent and the water may have been mixed prior to injection or the cleaning agent and the water are successively sprayed from a spray bar 61, 61 'or simultaneously, but separately from each other, by individual spray nozzles provided in the spray bars 61, 61'.

In alternative variants, the cleaning device 1 may also have more or less than two moistening devices 6, 6 '. The moistening devices 6, 6 'also do not have to comprise a spray bar 61, 61', instead the moistening devices 6, 6 'can also have individual spray nozzles, which are distributed on the first module 10 of the cleaning device 1 and aligned with the cleaning element 3. The first and the second module 10, 20 are surrounded for ease of installation and removal of a housing 100, 200, which protects the components of the first and second module 10, 20 at the same time from contamination by paint, cleaning agents or the like. The two modules 10, 20 may additionally be surrounded by a common housing, so that the entire cleaning device 1 can also be removed at one time from the printing press or arranged thereon.

Claims

claims

Cleaning device (1) for a surface (21) of a cylinder (2) of a printing and / or copying machine, wherein the cleaning device (1) has a cylindrical cleaning element which can be set into rotary motion by at least one drive and a cleaning attachment (32) on its outer circumference (32). 31) and having a suction device (4, 4 ') which can be guided at least one suction medium with at least one suction channel (41, 41) extending on the outer circumference (32) of the cleaning element (3) and extending along the longitudinal direction of the cleaning element (3). 41 '),

characterized,

in that at least one suction slot (42, 42 '), which extends along the suction channel (41, 41') and is aligned with the cleaning element (3), opens into the suction channel (41, 41 ') tangentially to the suction channel cross section.

Cleaning device according to claim 1, characterized in that the suction channel (41, 41 ') has a in its longitudinal orientation on both sides outwardly enlarging inner cross-section.

Cleaning device according to at least one of the preceding claims, characterized in that at least one of the suction slot (42, 42 ') forming, along the suction channel (41, 41') of this projecting webs (43, 43 ') is formed of flexible material.

Cleaning device according to at least one of the preceding claims, characterized in that centrally through the suction channel (41, 41 ') extends a rod or an inner tube not flowed through by the suction medium.

Cleaning device according to at least one of the preceding claims, characterized in that, in addition to a suction region of the suction channel (41, 41 ') connected to an extraction tract, at least one flow baffle is provided in the suction channel (41, 41').

Cleaning device according to at least one of the preceding claims, characterized in that, in addition to the suction channel (41, 41 ') and along the exhaust duct Suction channel (41, 41 ') at least one on the cleaning element (3) aligned and from the suction medium umströmbare doctor blade (5) is provided.

7. Cleaning device according to claim 6, characterized in that the doctor blade (5) is rod-shaped.

8. Cleaning device according to claim 6 or 7, characterized in that the doctor blade (5) within a guide (51) relative to the cleaning element (3) is formed positionally variable.

9. Cleaning device according to claim 8, characterized in that the doctor blade (5) radially to the axis of rotation of the cleaning element (3) is linearly adjustable.

10. Cleaning device according to at least one of claims 6 to 9, characterized in that on both sides of the doctor blade (5) each have a suction channel (41, 41 ') is provided.

1 1. Cleaning device according to at least one of the preceding claims, characterized in that the at least one drive within the cleaning element (3) is provided and fixed to a machine wall of the printing and / or copying machine.

12. Cleaning device according to claim 1 1, characterized in that in the cleaning element (3) two drives for the cleaning element (3) are provided, which are fixed to mutually opposite machine walls of the printing and / or copying machine.

13. Cleaning device according to at least one of the preceding claims, characterized in that the cleaning device (1) has a moistening device (6, 6 ') with at least one along the suction channel (41, 41') extending spray bar (61, 61 ').

14. Cleaning device according to claim 13, characterized in that the moistening device (6, 6 ') at least one first spray bar (61) for spraying the cleaning element (3) with water and at least one second spray bar (61 ') for spraying the cleaning element (3) with cleaning agent, wherein the first and the second spray bar (61, 61') on opposite sides of the suction channel (41, 41 ') are arranged.

15. Cleaning device according to claim 13 or 14, characterized in that the cleaning device (1) has a first module (10), which has the cleaning element (3) and its drive components, and a second module (20), the suction (4 , 4 '), whose components and the moistening device (6, 6'), wherein the second module (20) from the printing and / or copying machine is removable, without a component of the first module (10) of the printing and or dismantle the copying machine.

16. Cleaning device according to claim 13, characterized in that the components of the second module (20) in a common, separately from the components of the first module (10) of the printing and / or copying device removable housing (200) are provided.

17. Cleaning device according to claim 15 or 16, characterized in that the second module (20) is backpack-like placed on the first module (10) or can be placed.