DE19949753A1 - Procedure for cleaning surface of printed material processing machine entails drawing dirt from surface through revolving hollow cleaning roller in first position and blowing dirt from cleaning roller in second position - Google Patents

Abstract

The procedure for cleaning the surface(8) of a printing drum or cylinder face entails drawing dirt from the surface through a revolving hollow cleaning roller(7) in a first position and blowing the dirt from the cleaning roller in a second position. An Independent claim is included for a device for cleaning the surface of a printing machine with a revolving hollow cleaning roller supplied with compressed air on the inside and which is made of air penetrable material and/or with air holes(18,19). An Independent claim is included for a printed material processing machine equipped with the proposed cleaning device.

Description

The invention relates to a method for cleaning a surface, especially a substrate, drum / cylinder or printing form surface, and a device for cleaning a surface with which the Process can be carried out, especially in a printing machine.

DE-OS 25 52 725 describes a brush for dust removal, which works with both suction air and compressed air. The brush works with compressed air support by a blow air rod, the jet air flow of which the material to be dusted is directed. The brush itself is neither outside and inside can be pressurized with compressed air and also not rotating, but rigid, as described on page 2, paragraph 2 of the document.

In JP-PS 27 03 447 is a dedusting device with a rotating one Endless brush described, which is associated with a suction device and which cannot be pressurized with compressed air.

DE-OS 26 05 895 describes a device for surface cleaning described, which is rotatably mounted in a housing rotating Includes cleaning element. The housing is connected to a vacuum source  connected. This cleaning element is also not can be pressurized with compressed air.

A disadvantage of the devices described is that the Contamination not or only poorly during the cleaning process detach from the cleaning elements so that from the cleaning elements Soiled dirt is partially returned to the one to be cleaned Surface can be transferred back.

DE 43 14 046 A1 describes a device for removing surfaces adhering particles are described in which for cleaning their endless circumferential wiping element according to claim No. 26 a Blowing and / or suction and / or stripping device can be arranged.

DE 42 13 342 A1 describes a device for mechanical cleaning of Described surfaces in which according to claim No. 8 in Area of a deflecting roller a blowing and / or suction device for removal provided by a tape-like fleece particles is provided.

The one described in the two documents mentioned above Devices is peculiar that neither the blowing nor the suction device Wiping element or the fleece is assigned on the inside. Unfavorable to those in it Proposed arrangements is that on the outside of the wiping element or the fleece-blowing blowing devices to the desired effect opposite effect can occur, which is that the most Catch the wiping element or particles adhering to the fleece even more.  

DE 31 05 363 A1 describes a device for the automatic cleaning of Dedusting rollers described. One with a nozzle The cleaning device is attached to the dedusting roller to be cleaned can be brought up and through the nozzle air is at a flat angle on the Dedusting roller blowable. The dedusting roller is on the outside, however Cannot be pressurized on the inside. One not with the web to be cleaned The dedusting roller in contact is cleaned during this process the web cleaning can be carried out with another dedusting roller can.

A disadvantage of this device is that it is used for cleaning Dedusting roller is not cleaned at the same time and changes in the course of Cleaning process deposits more and more dust on the roller, which causes the cleaning effect deteriorates increasingly. With that in certain Time intervals required roll change, in which a soiled Roll out of use and a fresh roll is put into use is one Interruption of the cleaning process connected. This is in many Use cases not acceptable. If the device z. B. in Printing machines used to clean the substrate, then that would be Roller changes are always associated with an interruption in printing, if should be avoided that uncleaned printing material by the printing press running. The resumption of printing is every time with so-called Start-up waste connected because z. B. with the ink and fountain solution must adapt to a certain system inertia to the production status.

Therefore, it is the object of the invention to provide a cleaning method for effective and continuous cleaning of a surface and a To create cleaning device, the cleaning element  releases soiled dirt easily and with which the procedure can be carried out.

According to the invention, the object is achieved by a method using Features of claim 1 and by a device with the features of claim 2 solved. The subclaims contain further features.

If the optional back-related claim 10 does not apply to any of the upstream claims are defined, define the characteristics of Claim 10 an inventive subject matter.

The method for cleaning a surface, in particular a printing material Drum / cylinder or die surface, includes that from the surface soiling to be removed in a first circulating position of a circumferential cleaning element sucked through this through this and in a second circulating position of the cleaning element be blown off by this.

With this method, a very effective cleaning is of various types Surfaces possible without frequent interruptions. The pollution are safely grasped by the cleaning element, transported and delivered without back to the surface to be cleaned to a significant extent to be transferred.

The device for cleaning a surface, in particular for carrying out of the method described above in a substrate processing Machine, has a rotating and pressurized air inside  Cleaning element, which consists of an air-permeable material and / or is provided with air openings.

The self-cleaning effect inherent in the cleaning element according to the invention and the achieved favorable detachment behavior of the soiling from Cleaning element can be by using the in DE-OS 26 05 895 described scraper plate and also in JP-PS 27 03 447 do not reach the suction device described. Preferably that is all-round cleaning element on the inside during cleaning can be pressurized with compressed air. However, one also belongs to the scope of the invention Variant in which the cleaning element after cleaning the surface is pressurized, so that the adhering impurities better can be removed from the cleaning element. With this cleaning the Surface cleaning of the cleaning element itself can do that Cleaning element also circulate and can be a scraper on this lie on the outside. The cleaning element can in addition to the inside Blowing air can be subjected to suction air on the inside and / or outside his.

In the case of a device which advantageously further develops the device according to the invention Embodiment, the cleaning element is a cleaning roller, which as a blow roller is formed.

This is a structurally particularly inexpensive solution in which the roller revolves around its axis of rotation and in which an interior of the roller with blown air is acted upon. The cleaning roller can also both inside the roller can be blown as well as suction air, d. H. it can be the same interior in addition to the blown air also with suction air or another interior of the  Suction air can be applied to the roller, the roller being a blowing and Suction roller is at the same time. In the case that the same with blowing and suction air can be acted on, this happens in succession, e.g. B. takes place during cleaning the surface the suction air and during the Cleaning the roller blowing air. The interior can too periodically in a first rotational angle position of the roller with suction air and in one Blown air are applied to the second rotational angle position. The air can escape Blow out circumferential air openings of the roller (blown air) and if necessary into these air openings or other peripheral air openings of the roller inflow (suction air).

In a further embodiment, the cleaning roller is a hollow roller formed which around a blowing device arranged inside the roller is rotatable.

The blowing device blows from the peripheral air openings of the roller z. B. in a substantially radial direction. In this embodiment, can the cleaning roller consist of a roller core around which a Roll sleeve is rotatable. In the roller core one can be connected to a blast air source connected blow chamber be formed, which is open to the roll shell and forms the blowing device. The blow chamber can permanently with constant air pressure or to increase the effect with Blow pulsating or pulsed air pressure. Training the Cleaning roller as a hollow roller allows the blower and at The presence of a suction device is designed to be fixed or orientable can be and do not need to circulate. The blowing device can also the hollow roller cooperate in the manner of a rotary valve, so that the blow openings in the hollow roller during their rotary movement in one  certain rotational position, d. H. depending on the phase position, periodically with the Blowing device in the air openings overflowing blowing air can be supplied.

In a further embodiment, the cleaning roller is a hollow roller formed which around a suction device arranged inside the roller is rotatable.

The suction device can or through the air in the circumferential air openings suck and hold an air-permeable peripheral surface of the roller the contamination is safe on the roller. In this embodiment, Roller core a suction chamber connected to a suction air source be formed, which is open to the roll shell and the suction device forms. With a split roller core, the suction chamber and the Blow chamber can be formed in different parts. The suction device can also with the hollow roller in the manner of a rotary valve cooperate so that through the air openings in the hollow roller at the Periodic rotation depending on the phase position through the suction device air can be sucked in. In the presence of both the blowing device and one and the same air holes in a first Rotary position of the hollow roller through the suction device with suction air and in one second rotary position of the hollow roller through the blowing device with blowing air be acted upon, d. H. it is a coordinated one phase-dependent periodic suction and blowing air possible. Instead of the air holes, a certain air permeable Air surface area of the roller are exposed to air.  

In a further embodiment, the blowing device is as one Compressed air chamber formed, which is a substantially of of the surface to be cleaned has a blow opening.

This avoids that those picked up by the roller Contaminants get back onto the surface to be cleaned. Advantageously, the opening of an outside of the roller Suction device, e.g. B. one connected to a vacuum source Suction hood facing so that the contamination by the Blow device directly into the suction air flow of the suction device be blown in.

In a further embodiment, the suction device is as one suction air chamber formed, which is essentially a has suction opening directed towards the surface to be cleaned.

The dirt can be directly in the contact area of the roller are sucked onto the roller to the surface to be cleaned.

In another embodiment, the cleaning roller is variable as one assembled modular system.

For example, depending on the cleaning task, a roller core can also be used various roller sleeves can be equipped. For a sensitive smooth Surface can be a plush-covered roller cover and hard for a too cleaning structured surface over a roller cover covered with bristles be put over the roller core.  

In a further embodiment, the modular system consists of Cleaning pieces, which can be covered with bristles, for example Spacers, with the cleaning pieces and the spacers in Axial direction of the cleaning roller can be joined coaxially.

It is advantageous here that the cleaning roller is of variable format can, if this is used in a substrate processing machine. In this case, the effective cleaning width results from the axial length and the number of cleaning pieces put together. The remaining part of the Roller can be filled with one or more spacers, so that the total length of the roll results. One or more spacers can but can also be inserted between the cleaning pieces so that Cleaning work with an uncleaned corridor between two cleaned Let strips run. It can also cleaning and / or Spacers with different outside diameters are used, so that there is a cleaning roller with one paragraph or with multiple paragraphs results with which is adapted at the individual step heights Have the outside diameters of the roller clean well stepped surfaces.

In a further embodiment, the cleaning roller is a Brush roller with blowing and / or suction air on the inside of the roller circumferential air openings.

A brush roller that can be blown on the inside of the roller blowing air openings on the circumference is inventive in itself. The same applies to one Brush roller on the inside of the drum with suction on the circumference Suction openings and also for an inside of the roller both blow air and Brush roller that can be subjected to suction air with circumferential air openings. This  However, features are also considered with regard to a possible further development of the above embodiments. A pneumatic one Brush roller can be used very universally and enables thorough cleaning Cleaning various surfaces. For example, such Brush roller can be used in vacuum cleaners for floor care. However, the brush roller is preferably used in printing material processing Machine application.

In a further embodiment, the cleaning element is a Endless cleaning belt encircling at least two deflection rollers.

The cleaning tape can be made of an air-permeable cleaning material, e.g. B. consist of a fabric. The cleaning tape can also be made in one airtight material, in which air holes are made and for example, a perforated rubber band. Of course there is also one Combination possible, in which an air-permeable cleaning material is additionally perforated or on a perforated carrier material is applied. The latter is e.g. B. in a bristle-studded perforated Rubber band the case, the bristle trim the air permeable Cleaning material is. There are other forms of a multilayer Cleaning tape possible, this being formed in composite technology can and the respective advantageous properties of the composite materials fully are effective. For example, a labile but good contamination absorbent cleaning layer, e.g. B. from a nonwoven to a stable, the Cleaning layer support layer, z. B. an elastic plastic gauze be upset. However, the cleaning tape is preferably as one Endless brush trained. It is characteristic of all the cleaning tapes mentioned that this from the inside or back of the belt through the cleaning belt  can be pressurized with air, i.e. through the cleaning belt can be blown through. The front of the tape is in for cleaning moving contact with the surface to be cleaned. One is advantageous inside both blowing air and suction air can be cleaned, through which the pollution depending on the Circulation position of the cleaning belt can be sucked in and blown off can.

The inventive method and the device are not one Limited use in the polygraphic area and can be used, for example, in Household for cleaning flooring, the electrotechnical industry Cleaning of circuit boards, in the optical industry for cleaning glasses as well as in the wood or metal processing industry for the removal of Machining chips from workpieces are used. Using one as one Hard-bristled wire brush trained cleaning element can of these Workpieces also rust or varnish layers are sanded. First priority however, the method and cleaning device are for use provided in a printing material processing machine. The procedure and the cleaning device can, for. B. for powdering of already printed Media sheets before printing again to remove printing ink residues dried on a printing press cylinder or deposited paper dust and for the removal of imaging residues, e.g. B. in an ablative imaging by means of laser burns be used by a printing form. Preferably, the Cleaning device integrated in a printing machine and is there in the inline Operation used for a substrate cleaning prior to printing. The cleaning device can also be designed as a washing device  be, wherein the cleaning element is supplied with a washing liquid or this washing liquid is applied to the surface to be cleaned.

One that functions as the cleaning element and is used for dedusting circumferential band or roller brush can be on two different Point to the surface to be cleaned for cleaning. In a first variant, the brush touches the surface, so that a Abrasion results. In a second variant, there is between the the brush and the surface when cleaning a small distance from Z. B. 1 millimeter. The rotating brush, which in the second variant is preferably arranged in a suction housing, swirls on the Dust on the surface, so that this from the bristles or this generated air flow is carried away. If in the present Description of the invention from a surface positionable Cleaning element is mentioned, both variants explained above be included.

The invention is described below with reference to the drawing preferred embodiment described.

The drawing shows:

Fig. 1 a with several cleaning means for in-line printing substrate cleaning prior to printing Equipped printing machine,

Fig. 2 shows a cross section through one of the cleaning devices, the cleaning element is constructed as a cleaning roller,

Fig. 3 shows a longitudinal section through the cleaning device,

Fig. 4 shows a cleaning device with a cleaning element designed as a cleaning belt and

Fig. 5 shows another cleaning device with a cleaning belt.

In Fig. 1 a formed as a sheet-fed rotary printing machine printing machine 1 is provided with several arranged in a row printing units 2, 2 a and 2 b, a sheet feeder 57, a sheet delivery 58 and a sheet reversing device 59 shown. The printing press 1 has a cleaning device 4 a for cleaning the front side of the printing material to be printed in the printing units 2 , 2 a upstream of the turning device 59 and a cleaning device 4 b for cleaning the back side of the printing material to be printed in the printing units 2 , 2 b downstream of the turning unit 59 . The cleaning devices 4 a and 4 b are each assigned to a printing medium-carrying cylinder 3 a and 3 b, if necessary, on this or on the printing material guided thereon.

The rotating substrate 3 a, 3 b holds the substrate lying on it during cleaning in the gripper closure and can be a sheet transfer drum or an impression cylinder. The shown assignment of the cleaning device 4 a to the impression cylinder 3 a of the first printing unit 2 a printing on the front side of the printing material and the cleaning device 4 b to the impression cylinder 3 b of the first printing unit 2 b printing on the back side of the printing medium, each of a plurality of printing units 2 , 2 a and 2, is particularly favorable , 2 b. The cleaning device 4 a can also be part of a coating or finishing unit which is not shown between the sheet feeder 57 and the printing unit 2 a.

The cleaning devices 4 a and 4 b can be controlled with regard to various cleaning parameters as a function of the printing or machine speed which can be measured in sheets per hour in the sheet-fed printing press 1 . This control takes place via an electronic control device 52 , which is linked in terms of control technology to a drive 51 which determines the rotational speed of the printing medium-carrying cylinders 3 a and 3 b, or which the current machine speed is signaled by a sensor of the printing press 1 . The drive 51 can, for. B. all printing units 2 , 2 a and 2 b together driving main drive. The cleaning parameters are those of the rotary drive 47 , e.g. B. an electric motor, caused rotational speed or speed of the cleaning element 7 , 60 ( Fig. 2-5) of the respective cleaning device 4 a and 4 b, the size of the negative pressure generated by the suction air source 49 to the inside and the size of the suction air source 6th generated negative pressure for the external suction air application of the cleaning element 7 , 60 and the size of the overpressure generated by the blowing air source 50 for the internal blowing air application of the cleaning element 7 , 60 . The cleaning parameters mentioned can also be controlled as a function of the type of printing material to be cleaned and its surface structure. A fan can be used as the suction air source 5 , 6 and a compressor can be used as the blowing air source 50 . Furthermore, with the actuator 53 , for. B. a pneumatically actuated piston-cylinder unit linked control device 52 controls the on and off movement of the cleaning devices 4 a and 4 b to or away from the respective impression cylinder 3 a and 3 b or the printing material guided on it.

In FIG. 2, a first preferred embodiment of the cleaning apparatus 4 a and b shown 4, wherein the cleaning member 7 is a rotating when cleaning around its central axis cleaning roller 7 is. The cleaning element 7 can rotate in the opposite direction or, as shown, in synchronism 11 with the movement 10 of the surface 8 to be cleaned here of the printing material sheet 8 . At the contact point or when the minimum distance between the surface 8 and the cleaning element 7 is adjusted without contact, a surface relative speed is due to the substantially higher rotational speed of the cleaning element 7 in comparison to the movement of the surface 8 , ie in this case to the peripheral speed of the printing medium-carrying cylinder 3 a or 3 b given. The cleaning roller 7 is formed as a hollow cylinder, which consists of a roll core 22 and a rotating around the roll core 22 roll shell 23 having circumferentially perforated air-permeable wall 17, which may be tubular or sleeve-shaped.

The roller core 22 is provided with pit-like recesses which form at least one suction air chamber 20 and, as shown, preferably two suction air chambers 20 and at least one blown air chamber 21 and, as shown, preferably two blown air chambers 21 and which can be clearly seen in FIG. 3. The inside diameter of the roll sleeve 23 is something, e.g. B., so that an annular gap 28 gives a few millimeters larger than the outer diameter of the roll core 22 at coaxial to the rolling core 22 of the roll bearing shell 23 between the roll shell 23 and the roll core 22nd This annular gap 28 is divided by two seals 27 a and 27 b between the roll sleeve 23 and the roll core 22 into a first annular gap region 29 and a second annular gap region 30 .

The strip-shaped seals 27 a and 27 b fastened to the roller core 22 extend substantially in the direction parallel to the cleaning roller 7 over the entire length of the cleaning roller 7 , so that the annular gap regions 29 and 30 are sealed to one another in the circumferential direction. The seals 27 a and 27 b are each formed from a row of springs abutting against the inside of the roller sleeve 23 and well suited as a seal for mutually movable parts, so that neither the roller sleeve 23 nor the seals 27 a and 27 b cause noticeable abrasion subject to prolonged use. Other suitable low-wear materials in the form of sealing lips can also be used as the seals 27 a and 27 b. The seals 27 a and 27 b are preferably arranged such that they are angularly offset from one another such that the suction-air-conducting annular gap region 28 extends over a somewhat larger circumferential angle, for. B. of about 240 °, as the blowing air-conducting annular gap region 29 and can also be arranged diametrically to one another. The suction air is sucked in by the suction air source 49 through the air-permeable cleaning material 15 of the cleaning roller 7 into the circumferential air openings 18 when, due to the rotation of the roller 11, they come into overlap with the annular gap region 28, which is under vacuum.

The dirt 56, which is mechanically and pneumatically picked up by the surface 8, adheres very well to the air-permeable cleaning material 15 and is transported by the circumferential cleaning element 7 or the roller sleeve 23 into the blow-off area 29 of the cleaning element 7 , which is arranged essentially opposite the suction area 30 and faces a suction device 5 .

The air-permeable cleaning material 15 is preferably designed as a bristle trim 15 of the cleaning element 7 and advantageously covers the air openings 18 , 19 , whereby it acts as a filter which prevents the contamination 56 from penetrating into the suction air openings 18 and clogging the air-conducting system. The bristles 15 are arranged as brush-like bristle tufts 15 which spread apart in the direction of the outside bristle ends, but are combined at the foot, and which merge into one another at the outside bristle ends, so that there is an essentially closed bristle surface on the outside with respect to the cleaning element 7 the contaminants 56 deposit. Between the attachment points of the bristle tufts 15 on the cleaning element 7 , the air openings 17 , 18 , 19 are introduced therein, the bristle tufts 15 and air openings 17 , 18 , 19 both in the circumferential or circumferential direction and in the axial direction in a row and in a top view a checkered pattern staggered arrangement are arranged. The tufts of bristles 15 and the air openings 18 , 19 can also be arranged such that there are several air openings 18 , 19 between each two tufts of bristles 15 or that, seen in the direction of rotation of the cleaning element 7 , rows of axially parallel bristles alternate with such rows of air openings or that in the axial direction of the Cleaning element 7 seen z. B. alternate annular rows of bristles with such rows of air openings. In addition to the bristles 15 , other air-permeable cleaning materials can also be used. The cleaning element 7 can, for example, be provided on the outside with a felt-like covering or a textile covering which covers the air openings 18 , 19 and through which the contaminations 56 can be sucked in and blown off.

The generously dimensioned annular gap 28 is generally more advantageous compared to a short bearing play between the roller sleeve 23 and the roller core 22 , which is also possible in some applications, because after a very long period of use, contaminants 56 may not get into the suction openings 18 and through them possible clogging of the space between the roller sleeve 23 and the roller core 22 can lead to their seizure on one another. In addition, the air guidance systems formed by the air chambers 20 , 21 and annular gaps 18 , 19 result in aerodynamically favorable air passages. The opening 54 of each suction air chamber 20 opening into the annular gap 30 and the opening 55 of each blowing air chamber 21 opening into the annular gap 29 and having an angular offset with respect to the opening 54 can be kept narrow in the circumferential direction, the cleaning roller 7 nevertheless being large over the circumferential length of the respective one Annular gap area 29 , 30 has a certain circumferential angle sucking or blowing. The cleaning element 7 is surrounded by a housing 24 , to which a vacuum can be applied by means of the suction air source 6 .

The hood-like housing 24 forms, together with the suction air source 6, the suction device 5 for suctioning the contaminants 56 in the form of a capsule which comparatively closely surrounds the cleaning element 7 in its suction area 30 , which capsule in the blow-off area 29 approximately from the seals 27 a and 27 b in a funnel-shaped form transforms. The circumferential cleaning element 7 is a scraper 32 for stripping the contaminants 56 , for. B. in the form of a dipping in the bristles 15 wiping edge, which can be arranged in the interior of the housing seen in the circumferential direction of the blowing device 21 preferably upstream. Adhering to the bristles 15 impurities 56 are first spun off during rotation of the cleaning member 7 from the stripper 32 temporarily bent back and spring-back in its initial position bristles 15 in the suction air of the suction device 5 and adhesive remaining still on the bristles 15 impurities 56 from the blowing means 21 immediately blown off through the bristles 15 and blown into the suction air flow of the suction device 15 . The surface 8 to be cleaned can come into contact with the cleaning element 7 through a housing opening which is in overlap with the suction region 30 .

At the upstream in the movement direction 10 of the surface 8 and trailing edge of the case of the housing opening are selectively usable, multifunctional and axially extending to the cleaning member 7 seals 16, 31 on the housing 24 attachable, which as left lying on the surface 8 contaminants 56 stripping rows of bristles 16 or the guide rollers 31 are formed. The use of the guide rollers 31 is very cheap if the surface 8 is a stiff sheet of printing material z. B. is made of cardboard, which is held by means of the guide rollers 31 in secure support on the respective cylinder 3 a and 3 b. In addition, seals are not shown on the front and rear edge of the housing opening for reasons of better clarity, for. B. also in the form of a brush tape, so that the housing opening is sealed all around against the surface 8 and an optimal vacuum can be built up in the housing 24 for sucking in the contaminants 56 .

The cleaning devices 4 a and 4 b can each be guided by a guide 12 by means of an adjusting device 53 either in the working position shown in FIG. 2 with contact or a small distance of the cleaning element 7 from the surface 8 and in a rest position without contact or with an increased distance from the Bring the cleaning element 7 to the surface 8 . For this purpose the housing 24 is mounted in the cleaning member 7 is adjustable together with the housing 24th The guide 12 is designed as the shown consisting of grooves formed on both sides of the machine side frame and in particular curved grooves 13 and in each case a guide pin 12 guided in the grooves 14 . The cleaning devices 4 a and 4 b can, however, also be pivotally adjustable.

Each of the circumferential air openings 18 , 19 of the cleaning element 7 is at the same time a suction opening 18 and a blowing opening 19 , which can be subjected to blowing and suction air as a function of the rotating movement of the cleaning element 7 , here the roller rotation. Depending on the circumferential position or the angular position of the air opening 18 , 19 , either suction air supply 18 , 19, identified by reference number 18 in FIG. 2, is carried out via the suction air chamber 20 connected to the suction air source 49 , or identifiable in FIG. 2 by reference number 19 Blown air exposure made to the same air opening 18 , 19 via the blown air chamber 21 connected to the blown air source 50 , so that each air opening 18 , 19 is blowing or sucking depending on the phase position.

In Fig. 3, the cleaning device 4 a and 4 b is shown in a longitudinal section, so that the inner structure of the roller core 22 and the rotary bearing of the roller sleeve 23 are particularly well recognizable. The cross-section 42 and 43 of each air chamber 20 and 21 gradually starts from the outside air connections 25 and 26 in the axial direction towards the center of the roller core 22 from a comparatively large cross-sectional area 42 to a comparatively small cross-sectional area 43 and reaches its center in the cleaning roller 7 Minimum value zero, at a point at which both suction air chambers 20 and both blowing air chambers 21 are each separated from one another by a very narrow ridge. The thickness 36 , 37 of the roller core 22 , which looks approximately rhombic in the sectional plane shown, in which the substantially wedge-shaped profiled chambers 20 and 21 are mirror-symmetrical to one another both with respect to a vertical axis and with respect to a horizontal axis, is correspondingly different. It can also be provided that the blow chambers 21 are of identical design to one another and the suction chambers 20 are of identical design to one another, the shape and / or the volume of the blow chambers 21 being different from that or that of the suction chambers 20 . Fluidically advantageous that the blown air and the suction air at any point in the axial direction of the cleaning element 7 and z. B. in the outside roller areas near the connections 25 and 26 as well as in the central areas of the cleaning element 7 with the same blowing force or is sucked in with the same suction force. The suction air connections 25 and the blown air connections 26 are tubes which are inserted laterally into the roller core 22 and open into the respective chambers 20 and 21 and which are designed as sockets for attaching hoses forming the air lines 48 .

The roller shell 23 consists of a formed as a support sleeve 69 support 69 for the shell pieces 33, 34 which tightly slid onto the carrier 69 in the axial direction and are secured against rotation to the carrier 69 in the attached position. This can e.g. B. by a feather-like connection in the form of an inside elevation of the sleeve pieces 33 , 34 , which can be inserted when pushed into an outside axial groove of the carrier sleeve 69 , or by another suitable shaft-hub connection 76 . In the pushed-on position of the sleeve pieces 33 , 34, it is ensured that the air openings 18 , 19 passing through the sleeve pieces 33 , 34 are in exact overlap with openings 70 of the carrier sleeve 69 corresponding in the arrangement. The sleeve piece 33 is a spacer 33 without bristles, and air openings, while the sleeve member 34 is provided with air holes 18, 19 and cleaning material in the form of bristles 15 of sewage 34th The spacer 33 serves to maintain a distance between the cleaning pieces 34 and can also be pushed on as an end piece.

The sleeve-shaped sleeve pieces 33 , 34 can also be secured to one another against rotation by a form-fitting interlocking shape. This is particularly expedient in the case of configurations of the roller sleeve 23 exclusively from the sleeve pieces 33 , 34 without a carrier 69 receiving them. If the carrier 69 is present, the anti-rotation device 35 of the sleeve pieces 33 34 is expedient to one another in those cases in which not every individual sleeve piece 33 , 34 can be secured against rotation relative to the carrier 69 . Then, it is sufficient if at least one of the shell pieces 33, is secured 34 against rotation to the carrier 69, wherein each additional shell piece 33, 34 over the respective rotation 35 to the adjacent shell pieces 33, 34, ultimately from the respect to the support 69 secured shell member 33, 34 is also fixed. For example, the two outside cover pieces 33 , 34 can be secured against rotation to the carrier 69 and connected to the latter via pins 76 and hold each cover piece 33 , 34 inserted between these outside cover pieces 33 , 34 via one or more locking devices 35 . The anti-rotation device 35 can, for. B. consist of a spline on one flat side or both flat sides of the respective sleeve piece 33 , 34 , the face teeth of mutually facing flat sides of two adjacent sleeve pieces 33 , 34 are in engagement with each other.

The roller core 22 is on the housing 24 and z. B. attached in the side wall 38 . The both sides attached to the core roll 22 guide pin 14 may instead be attached to the housing 24th A for the cleaning roller 22, 23 axially extending, the cleaning roller 22, 23 surrounding and on its one side on the side wall 38 attached to the housing wall is supported on its other side via a fitting on the support 69 pivot bearing 40 on the roller shell 23 from. The roller sleeve 23 is supported on both sides by a rotary bearing 39 and 41 coaxially on the roller core 22 , so that the annular gap 28 results. The pivot bearings 39 , 40 and 41 can be roller or ball bearings. A drive wheel 44 , which is arranged coaxially with it, is rotatably connected to the roll sleeve 23 , which is a gear 44 toothed on the end face and wrapped by the endless toothed belt 46 . The drive wheel 44 is seated both on the rotary bearing 41 and on the carrier 69 fastened to the drive wheel 44 , so that the carrier 69 rests on the rotary bearing 41 via the drive wheel 44 .

The roller sleeve 23 is rotatable by means of the motor 47 during the cleaning operation. On the drive shaft 46 of the motor 47 sits a transmitting of the driving motion also the toothed belt gear umschlungenes 45th The speed of the cleaning element 7 , the blown air supply with which the cleaning element 7 can be acted upon on the inside, the vacuum with which the cleaning element 7 can be acted on the inside and the vacuum with which the housing 24 can be acted upon can be controlled independently of one another by the control device 52 ( Fig. 1) regulate, at least one of these variables depending on the machine speed, for. B. the printing speed, the printing substrate processing machine 1 is adjustable. For example, when the machine speed is increased, the speed and / or the blown air supply and / or the vacuum in the cleaning element 7 and / or the vacuum in the housing 24 can also be increased and the changed machine speed can thus be tracked. For this purpose, the drive 47 , the suction air sources 6 and 49 and the blown air source 50 are controlled accordingly by the control device 52 .

In Figs. 4 and 5 are also in the printing material processing machine 1 as the cleaning devices 4 a and 4 b shown usable devices each as a cleaning tape 60 which cleaning elements 60. In the description of the preceding figures the more general term cleaning element 7 is realized instead of the particular term cleaning roller 7 is used in certain contexts, because the features mentioned in connection with the constructed as a cleaning roller 7 Cleaning member 7 readily to the designed as a cleaning roller 60 Have cleaning element 60 transferred and therefore need not be mentioned again below.

As shown in FIGS. 4 and 5, the air-permeable cleaning belt 60 can be assigned a blowing device 67 , 68 and / or a suction device 65 , 66 that blows through the cleaning belt 60 on the inside or on the back. The blowing air and / or suction air cleaning tape 60 can be made of an air-permeable, for. B. textile cleaning material and / or be interspersed with air holes and / or be shown as an endless brush.

In the illustrated in Fig. 4 devices 4 a, 4 b respectively forms at least one of the deflection rollers 61, 62 a hindurchblasende by the cleaning tape 60 Blasrolle 61 which blows off the contamination from the cleaning belt 60, and preferably blows into a suction device 75 miles. In the devices 4 a and 4 b, at least one deflecting roller 61 , 62 can also form a suction roller 62 that sucks through the cleaning belt 60 and keeps it in contact with the surface 71 . In particular, one deflection roller 61 forms the blow roller 61 and the other deflection roller 62 forms the suction roller 62 .

With regard to its structural design, the device shown in FIG. 4 differs from the device shown in FIGS. 2 and 3 on the one hand in that the blowing device 67 and the suction device 65 are not formed in the same roll core here but rather are assigned separately to the different deflection rollers 61 on the inside are. The two-part, namely in a fixed roll core with the air device 65 or 67 and a rotatable around the roll core roll cover with air holes, construction of the guide rollers 61 , 62 corresponds to that of the cleaning roller 7 , so that in connection with this special training, such as. B. the air chamber geometry, can also be advantageously used here. On the other hand, the device shown in FIG. 4 differs from that of FIGS. 2 and 3 in that instead of the cleaning material in the form of bristles attached directly to the cleaning roller 7 , the cleaning material here is driven in rotation as one of at least one of the deflection rollers 61 , 62 Cleaning tape 60 and preferably is designed as the endless brush 60 .

The cleaning tape 60 when worn can be replaced particularly cost with a fresh cleaning tape 60th

In the cleaning device 4 a, 4 b shown in FIG. 5, the reference numerals of FIG. 4 are partially adopted for elements having the same function and the blowing device 68 and / or the suction device 66 can be assigned to at least one strand 63 and 64 of the cleaning belt 60 . In particular, an active section 63 lying on the front against the surface 71 to be cleaned is assigned on the back the suction device 66 and a passive section 64 on the inside the blowing device 68 , which blows the dirt through the cleaning belt 60 into a suction device 75 arranged on the front. The deflection rollers 72 and 73 do not have any additional pneumatic function in this embodiment. The blowing device 68 and the suction device 66 are open towards the cleaning belt 60 and z. B. box-shaped chambers 66 , 68 . The electric motor drive 74 of the cleaning belt 60 via a toothed belt gear and a deflection roller 73 can also be used in the embodiment shown in FIG. 4.

REFERENCE SIGN LIST

1

Printing press

2nd

,

2nd

a,

2nd

b printing unit

3rd

a,

3rd

b cylinder

4th

a,

4th

b cleaning device

5

Suction device

6

Suction air generator

7

Cleaning roller

8th

Substrate sheet

9

Gripper

10th

,

11

Direction of rotation

12th

guide

13

Curve groove

14

Guide pin

15

Tufts of bristles

16

Bristle seal

17th

Air outlet

18th

Suction air opening

19th

Blow air opening

20th

Suction air chamber

21

Blown air chamber

22

Roll core

23

Roll cover

24th

Suction housing

25th

Suction air discharge

26

Blown air supply

27

a,

27

b Bristle seal

28

Annular gap

29

,

30th

Annular gap area

31

Leading role

32

Scraper

33

,

34

Sleeve piece

35

Gearing

36

,

37

Core thickness

38

Housing side wall

39

,

40

,

41

roller bearing

42

,

43

Chamber cross-sectional area

44

Sprocket

45

gear

46

Timing belt

47

Electric motor

48

Air duct

49

Suction air source

50

Blown air source

51

Main drive

52

Control device

53

Actuator

54

,

55

opening

56

Paper particles

57

Sheet feeder

58

Sheet boom

59

Turning device

60

Cleaning tape

61

,

62

Pulley

63

Active strand

64

Passive section

65

,

66

Suction air chamber

67

,

68

Blown air chamber

69

Carrier sleeve

70

breakthrough

71

surface

72

,

73

Pulley

74

Band drive

75

Suction device

76

Shaft-hub connection

Claims (12)

1. A method for cleaning a surface ( 8 ), in particular a printing material, drum / cylinder or printing form surface, with dirt ( 56 ) to be removed from the surface ( 8 ) in a first circulating position of a rotating cleaning element ( 7 , 60 ) by this sucked through it and, in a second circulating position, the cleaning element ( 7 , 60 ) is blown through it. 2. Device ( 4 a, 4 b) for cleaning a surface ( 8 ), in particular for carrying out the method according to claim 11, in particular in a printing material processing machine ( 1 ), with a circumferential cleaning element ( 7 , 60 ) which can be pressurized with compressed air, which consists of an air-permeable material ( 15 , 60 ) and / or is provided with air openings ( 18 , 19 ). 3. Device according to claim 2, wherein said cleaning member (7) is a cleaning roller (7), which is designed as a blow roll, and particularly as a blowing and suction roll. 4. The device according to claim 3, wherein the cleaning roller ( 7 ) is designed as a hollow roller ( 7 ) which is rotatable about a blowing device ( 21 ) arranged on the inside of the roller. 5. Apparatus according to claim 3 or 4, wherein the cleaning roller ( 7 ) is designed as a hollow roller which is rotatable about a suction device ( 20 ) inside the roller. 6. The device according to claim 4 or 5, wherein the blowing device ( 21 ) is designed as a chamber which can be pressurized with compressed air and which has a blowing opening ( 55 ) directed essentially away from the surface ( 8 ) to be cleaned. 7. The device according to claim 5 or 6, wherein the suction device ( 20 ) is designed as a chamber ( 20 ) which can be subjected to suction air and which has a suction opening ( 54 ) directed essentially towards the surface ( 8 ) to be cleaned. 8. Device according to one of claims 1 to 7, wherein the cleaning roller ( 7 ) is designed as a variably assembled modular system ( 22 , 23 , 33 , 34 ). 9. The device according to claim 8, wherein the modular system ( 33 , 34 ) consists of (z. B. with bristles) cleaning pieces ( 34 ) and spacers ( 33 ) which are coaxially joined together in the axial direction of the cleaning roller ( 7 ). 10. A device for cleaning a surface ( 8 ), in particular according to one of claims 2 to 9, with a brush roller ( 7 ) with blow air and / or suction air which can be subjected to suction air, with peripheral air openings ( 18 , 19 ). 11. The apparatus of claim 2, wherein said cleaning member (60) by at least two deflection rollers (61, 62; 72, 73) is revolving endless cleaning belt (60) and in particular an endless brush (60). 12. Printing material processing machine ( 1 ), in particular printing machine ( 1 ), with at least one cleaning device ( 4 a, 4 b) designed according to one of claims 2 to 11.