EP1908591B1 - Cleaning device for a rotary printing press - Google Patents

Description

The invention relates to a cleaning device for cleaning at least one guide roller leading a paper web, which cleaning device has at least one in the region of the guide roller to be cleaned coaxial with this arranged in the bounded by the paper web clearance cleaning brush having a bristle field with helically rotating bristles and at least during the cleaning process with its bristle field at least partially applied to the guide roller cleaning, the cleaning device has at least one dirt outlet through which the means of at least one cleaning brush removed from the guide roller dirt particles sucked or the like can be discharged.

In the rotary printing machines used in particular for newspaper printing, the paper web is guided over a plurality of guide rollers, which serve guide rollers for web guidance and for deflecting the paper web inside the machine. In this case, the freshly printed paper is guided over such guide rollers, so that a subset of the still fresh ink can adhere to the respective guide rollers. Therefore, these guide rolls have already been given a coarse or structured roll surface so that the contact surfaces coming into contact with the paper or the printing ink thereon can be kept as small as possible on the roll surface. However, the still remaining on the roll surface ink can lead over time to an undesirable application of ink to the subsequent parts of the paper web and thus to a certain color fog on the newsprint.

To ensure that this color fog does not appear overly disturbing, the guide rollers must be cleaned from time to time. Considering that one is Variety of such guide rollers are located in a printing press, it is clear that such a cleaning of the guide rollers can be associated with a considerable effort.

It has therefore also provided a cleaning device in which the cleaning of the guide rollers production-dependent for the various web paths by wiping with the help of the paper webs. For this purpose, the paper webs are impregnated on both sides with detergent before entering the printing units. The wet paper webs are pulled through the machine at low speed. Brake units stop at different wrap angles the guide rollers in different clocked times and thereby generate the wiping process. In this case, the paper web takes fixed ink residues and paper dust from the guide rollers and conveys them out of the machine. The blocking of the guide rollers takes place several times during the washing process several times, so that the entire surface of the guide rollers is cleaned. To dry the guide rollers, these are also decelerated several times to a standstill while the dry paper web passes. Considering that this washing operation carried out by means of a wet paper web is to be carried out over a period of several minutes and taking into account that a powerful printing press can pass approximately 100 meters of paper per minute, it becomes clear that the washing process carried out with the previously known cleaning device would lead to a " Müllberg "can lead from several 100 meters of paper waste, which paper waste is soaked with detergent and contaminated with excess ink and therefore should be disposed of only as hazardous waste.

From the DE 38 12 678 C3 already a cleaning device for cleaning cylindrical lateral surfaces in a sheet-fed rotary machine is known, which has a roller-shaped cleaning brush, which cleaning brush in the non-sheet-guiding area on the lateral surface of the cylinder during the pressure can be adjusted. The cleaning brush of the DE 38 12 678 C3 Previously known cleaning device, which may also have a bristle field with spirally arranged rows of bristles, is in a suction bell arranged, which has a, extending over the longitudinal extent of the cleaning brush suction air connection. The previously known cleaning device, which is to ensure a smear-free sheet transport with a high degree of functional reliability by relatively simple and reliable machine elements for a long running time, requires a relatively high space requirements in the regularly very cramped machine inside the rotary printing machine due to its long installation depth.

A cleaning device is also in EP 0 461 898 A1 disclosed.

There is therefore in particular the task of creating a cleaning device of the type mentioned above, which is characterized by a high cleaning effect and preferably also by a small footprint.

The achievement of this object is in the cleaning device of the type mentioned in that the bristle of at least one cleaning brush has at least two adjacent portions with oppositely circulating bristles that either removed in these sub-areas of the guide roller dirt particles to one between the adjacent cleaning brushes. Moving portions arranged common dirt outlet or each one laterally provided on the front end of the adjacent cleaning brush sections dirt outlet move.

The cleaning device according to the invention has at least one cleaning brush, the bristle field has at least two adjacent portions with oppositely rotating bristles. Since the bristles circulate helically in these partial areas and since the dirt particles dissolved by these bristles are to be transported to the dirt outlet only over these partial areas and thus over a comparatively short distance to the dirt outlet compared to the entire longitudinal extension of the cleaning brush, the cleaning brush of the cleaning device according to the invention is able to carry out these dirt particles comparatively easily to remove and transported away from the area of the guide roller. Because the cleaning brush dissolved the Dirt particles either to a disposed between the adjacent cleaning brush subregions common dirt outlet or to a laterally provided on the Stirnendbereichen the adjacent cleaning brush sections dirt outlet moves, and since the cleaning device according to the invention thus eliminates a long over the cleaning brush reaching suction bell, which is characterized Cleaning device according to the invention by a small installation depth and thus by a comparatively small footprint. Since the opposing portions of the cleaning brush easily dissolve the dirt particles located on the guide roller and can transport inside the cleaning device to the adjacent dirt outlet, the cleaning device according to the invention is also characterized by a high cleaning effect.

In order to achieve a consistently high cleaning effect over the entire longitudinal extension of the guide roll, it is advantageous if the two subregions of the bristle field of the at least one cleaning brush have an approximately equal longitudinal extent and adjoin one another approximately in the middle of the bristle field.

Advantageously, it is provided that the cleaning brush is mounted to be movable transversely to the guide roller longitudinal extent and pressurizes the guide roller by means of a pressing force. Since in this invention proposal, the cleaning brush is mounted transversely to the guide roller longitudinal extent movable and pressed by a pressing force against the guide roller, the high cleaning effect of the cleaning device according to the invention is additionally favored.

Since the cleaning brush can be comparatively long in accordance with the guide roller, it is expedient if the cleaning brush is movably mounted on its brush end regions and / or in the area of the bristle field, preferably between the cleaning brush subareas, and / or is pressurized by a pressure force. Such a cleaning device can also be used on large and powerful roll rotary printing machines be used with comparatively long guide rollers.

In this case, a particularly simple and advantageous embodiment according to the invention provides that at least one compression spring is provided as a pressure force, which pressurizes at least one cleaning brush bearing.

According to the invention, it is further provided that the cleaning brush and the guide roller assigned to it have a common rotary drive. If the cleaning brush and the guide roller assigned to it have a common rotary drive, not only is the space-saving design of the cleaning device according to the invention favored, but the cleaning device according to the invention can clean the guide roller both when the rotary printing machine is stationary and during production with the paper web running. Since the guide roller is also in drive connection with the common rotary drive, the guide roller can be moved and cleaned even when the rotary printing machine is stationary with or without the paper web guided over the guide roller.

The cleaning device can also be retrofitted even more easily to existing rotary printing presses when the rotary drive is in driving connection with the guide roller via at least one friction wheel, and when the friction wheel acts on the roller surface of the guide roller.

The high cleaning effect of the cleaning device according to the invention is further favored when the cleaning brush is in opposite directions rotatably drivable compared to its associated guide roller.
In this case, a particularly simple and space-saving embodiment according to the invention provides that the cleaning brush and the guide roller assigned to it have a common rotary drive.

To the cleaning device according to the invention also in large and To be able to use efficient rotary printing presses with comparatively long guide rollers, an embodiment according to the invention provides that the shaft of the at least one cleaning brush is additionally supported in the course of its longitudinal extent by means of at least one shaft bearing. It is particularly advantageous if at least one shaft bearing is provided in the parting plane between the counter-rotating bristles of the cleaning device according to the invention.

It is particularly useful when the cleaning brush acts on the guide roller to be cleaned resiliently.

A preferred embodiment according to the invention provides that the cleaning brush is pressurized in the region of its shaft bearing by means of at least one compression spring, which compression spring presses the cleaning brush against the cleaning guide roller.

A particularly simple and cost-saving embodiment according to the invention provides that the cleaning device has a housing which is made of an extruded and / or made of a metal or plastic profile.

The cleaning effect of the cleaning device according to the invention can be additionally increased significantly if the housing of the cleaning device has a longitudinally open cavity in which the cleaning brush is rotatably mounted.

It is particularly advantageous if the cavity of the cleaning device is shaped in its clear inner circumference with a small distance to the outer periphery of the cleaning brush.

Further features according to the invention will become apparent from the following description of an embodiment of the invention in conjunction with the drawings. Hereinafter, the invention with reference to a preferred embodiment explained in more detail.

• Fig. 1 eine Reinigungsvorrichtung zum Reinigen der in ei-ner Rotationsdruckmaschine befindlichen Leitwalze, wobei bei die Reinigungsvorrichtung hier in einem Querschnitt gezeigt ist,
• Fig. 2 die Reinigungsvorrichtung aus Figur 1 in einem Teil-Längsschnitt, wobei die Reinigungsvorrichtung im Bereich der Wellenlagerung ihrer Reinigungsbürste dargestellt ist,
• Fig. 3 die für die Reinigungsbürste vorgesehene Wellenlagerung der Reinigungsvorrichtung aus den Fig. 1 und 2, und
• Fig. 4 die Reinigungsvorrichtung aus den Fig. 1 bis 3 im Bereich des der Reinigungsbürste einerseits und der Leitwalze andererseits zugeordneten gemeinsamen Drehantriebs.

In den Figuren 1 und 2 ist eine Reinigungsvorrichtung 1 zum Reinigen der zylindrischen Mantelfläche einer Leitwalze 2 dargestellt. Diese Leitwalze 2 ist in einer ansonsten nicht weiter gezeigten Rollen-Rotationsdruckmaschine vorgesehen und soll dort die Papierbahn 3 führen. Die Reinigungsvorrichtung 1 weist dazu eine koaxial zur Leitwalze, 2 angeordnete Reinigungsbürste 4 auf, die ein Borstenfeld mit wendelförmig umlaufenden Borsten 5 hat. Die Reinigungsbürste 4 ist in dem durch die Papierbahn 3 umgrenzten Freiraum und somit im "Schatten" der von der Papierbahn 3 umschlungenen Leitwalze 2 angeordnet. Diese Reinigungsbürste 4 kann mit ihrem Borstenfeld zumindest während des Reinigungsvorganges die Leitwalze 2 wenigstens bereichsweise reinigend beaufschlagen.It shows:

• Fig. 1 a cleaning device for cleaning the guide roller located in a rotary printing machine, wherein the cleaning device is shown here in a cross section,
• Fig. 2 the cleaning device off FIG. 1 in a partial longitudinal section, wherein the cleaning device is shown in the region of the shaft bearing of their cleaning brush,
• Fig. 3 provided for the cleaning brush shaft bearing of the cleaning device from the Fig. 1 and 2 , and
• Fig. 4 the cleaning device from the Fig. 1 to 3 in the region of the cleaning brush on the one hand and the guide roller on the other hand associated common rotary drive.

In the FIGS. 1 and 2 a cleaning device 1 for cleaning the cylindrical surface of a guide roller 2 is shown. This guide roller 2 is provided in an otherwise not shown roller rotary printing machine and is there to guide the paper web 3. The cleaning device 1 has for this purpose a coaxial with the guide roller, 2 arranged cleaning brush 4, which has a bristle field with helically rotating bristles 5. The cleaning brush 4 is arranged in the bounded by the paper web 3 space and thus in the "shadow" of the looped by the paper web 3 guide roller 2. This cleaning brush 4, with its bristle field at least during the cleaning process, the guide roller 2 act on at least partially cleaning.

The cleaning device 1 has on both sides at their Stirnendbereichen in each case a dirt outlet 6; On the both sides of the Stirnendbereichen 'of the cleaning brush 4 provided dirt outlets 6, the dissolved by means of the cleaning brush 4 dirt particles can be removed. Because the Cleaning device 1 makes dispensable over the longitudinal extent of the cleaning brush 4 reaching bell, and since the cleaning device 1 shown here instead has a dirt outlet 6 instead at their Stirnendbereichen, the cleaning device 1 is characterized by a small installation depth and thus by a comparatively small footprint. In order to transport the dirt particles in the cleaning device 1 in the direction of the adjacent dirt outlet 6, the cleaning brush 4 has two sections 7, 8 and with oppositely rotating bristles, which in these subareas 7, 8 removed from the guide roller 2 dirt particles to each adjacent dirt outlet 6 move. Of the provided on both sides Schmutzauslässen 6 is in FIG. 2 only to see a dirt outlet 6. Since the opposing portions 7, 8 of the cleaning brush 4 easily solve the dirt particles located on the guide roller 2 and can transport inside the cleaning device 1 to the adjacent dirt outlet 6, the cleaning device 1 is also characterized by a good cleaning effect.

From a comparison of FIGS. 1 and 2 It is clear that the two sub-areas 7, 8 of the bristle field of the cleaning brush 4 have an approximately equal longitudinal extent and adjacent to each other approximately in the middle of the bristle field. The shaft 9 of the cleaning brush 4 is supported at its two shaft end regions and additionally also in the course of its longitudinal extension preferably approximately centrally by means of a shaft bearing 10. The cleaning brush 4 is pressurized in the region of its shaft bearing 10 by means of at least one compression spring 20, which compression spring 20 presses the cleaning brush 4 against the guide roller 2 to be cleaned.

In Fig. 3 the cleaning device 1 is shown in the region of one of its shaft bearings 10. In Fig. 3 is clearly visible that the cleaning brush 4 is movably mounted at their Bürstenendbereichen and preferably also in the region of the bristle field between the cleaning brush portions 7, 8. The cleaning brush is held in a cleaning brush bearing 21, which by means of a pressing force is movable against the guide roller. In this case, at least one compression spring 20 is provided as a pressing force, which is supported on a bearing receptacle 23 and the cleaning brush bearing 21 pressurized.

The cleaning device 1 has a housing 12, which is made of an extruded profile. The housing 12 has a cavity 13 which is shaped in its clear cross section with a small distance to the outer periphery of the cleaning brush 4. The cavity is open on the longitudinal side, wherein the bristles 5 of the cleaning brush 4 project ready for use from the longitudinal cavity opening 14 of the extruded profile 12.

In FIG. 2 It is indicated that the cleaning brush 4 and the guide roller 2 to be cleaned by it have a common rotary drive 15. This rotary drive 15 is preferably designed so that the guide roller 2 on the one hand and the cleaning roller 4 on the other hand have opposite directions of rotation.

In Fig. 4 is the common rotary drive 15 shown in more detail, which is associated with the guide roller 2 on the one hand and the cleaning roller 4 on the other. This rotary drive 15 has a drive motor 25, whose drive shaft is connected to the cleaning roller 4 via a belt drive indicated by the drive wheels 26, 27. This belt drive is associated with a belt tensioner 28, which ensures despite the movable mounting of the cleaning brush 4 for a tensioned drive belt. The opposite direction of rotation of the guide roller 2 is achieved via two gears 29, 30, which are connected via a further, indicated by the drive wheels 31, 32 belt drive with a friction wheel 33 in drive connection. This friction wheel 33 acts on the roller surface of the guide roller 2 not shown here Fig. 4 is indicated that the cleaning device 1 can be applied by means of at least one pneumatic cylinder 34 to the guide roller 2 or brought from this distance.

In Fig. 1 is indicated that the housing 12 of the cleaning device 1 may have a preferably over the cleaning brush 4 extending detergent spray tube 35, the one Spray application to the cleaning brush 4 allowed. In the lower region of the housing 12, a detergent outlet 36 is provided, in which the detergent used can be collected again and removed from the housing 12.

The cleaning device 1 shown here is characterized by its small footprint and by its high cleaning effect.

Claims (13)

1. Cleaning equipment (1) for cleaning at least one guide roll (2) in a rotary printing press that feeds a paper web (3), which cleaning equipment (1) has at least one cleaning brush (4) in the range of the guide roll (2) that should be cleaned, which is arranged coaxially to this cleaning equipment (1) in the expansion space, defined by the paper web (3), which possesses a bristle field with helically revolving brushes (5), and the brushes are brought with their bristle field to the guide roll (2) with the purpose of cleaning at least in some areas, during the cleaning process; wherein the cleaning equipment (4) has at least one dirt discharge unit (6), through which the dirt particles could be removed from the guide roll (2) by the means of at least one cleaning brush (4), wherein the bristle field of the at least one cleaning brush (4) has at least two adjacent sub areas (7, 8) with brushes revolving in the opposite direction, which move the dirt particles, removed from the guide roll (2), into these sub areas (7, 8) either to the sub areas of a conjoint dirt discharge unit, which is arranged between the adjacent sub areas of the cleaning brush (7, 8) or respectively to a dirt discharge unit (6), provided sideways to the adjacent sub areas of the cleaning brush (7, 8) at the end faces, characterized in that the cleaning brush (4) has a rotary drive (15), wherein the rotary drive (15) can be brought into driving connection with the guide roll (2) through at least one friction wheel (33), wherein the roll surface of the guide roll (2) is contacted by the friction wheel (33).
2. Cleaning equipment pursuant to claim 1 is characterized through the fact that both sub areas (7, 8) of the bristle field of at least one cleaning bristle (4) possess an approximately equal longitudinal extension and adjoin to each other approximately in the center of the bristle field.
3. Cleaning equipment pursuant to claim 1 or 2 is characterized through the fact that the cleaning bristle (4) is mounted so it could be moved diagonally to the longitudinal extension of the guide roll and the guide roll (2) is brought under pressure by the means of a pressing force.
4. Cleaning equipment pursuant to one of claims 1 through 3 is characterized through the fact that the cleaning bristle (4) is mounted so it could be moved at its bristle end faces and/or in the area of the bristle field preferably between sub areas of the cleaning bristles (7, 8) and/or is brought under pressure by the means of a pressing force.
5. Cleaning equipment pursuant to one of claims 1 through 4 is characterized through the fact that at least one pressure spring (20) is provided as a pressing force, which is brought under pressure to at least one cleaning bristles mount (21).
6. Cleaning equipment pursuant to one of claims 1 through 5 is characterized through the fact that the cleaning bristle (4) and the guide roll (2), assigned to it, have a joint rotary drive (15).
7. Cleaning equipment pursuant to one of claims 1 through 6 is characterized through the fact that the cleaning equipment (1) has a body (12) that is produced from an extrusion profile and/or from a metallic or plastic profile.
8. Cleaning equipment pursuant to one of claims 1 through 7 is characterized through the fact that the body (12) of the cleaning equipment (1) has an opening (13) located alongside, in which the cleaning bristle (4) is mounted so it could rotate.
9. Cleaning equipment pursuant to one of claims 1 through 8 is characterized through the fact that the opening (13) with its unobstructed inner perimeter is adjusted with a small gap to the outer perimeter of the cleaning bristle (4).
10. Cleaning equipment pursuant to one of claims 1 through 9, wherein the rotary drive (15) is in driving connection with the guide roll such that the guide roll can be moved with or without a paper web fed via the guide roll during a standstill of the rotary printing press.
11. Cleaning equipment pursuant to one of claims 1 through 10, wherein the rotary drive (15) has a driving motor (25), the drive shaft of which is connected with the cleaning roll (4) through a belt transmission.
12. Cleaning equipment pursuant to claim 11, wherein a belt tightener (28) is assigned to the belt transmission, which provides for a constantly tensioned drive belt despite the cleaning brush (4) being movable mounted.
13. Cleaning equipment pursuant to claim 12, wherein the opposite direction of rotation of the guide roll (2) is achieved by means of two gears (29, 30), which are connected with the friction wheel (33) through another belt transmission, which is indicated through drive wheels (31, 32).

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