EP2277702B1 - Rotation brush assembly - Google Patents

Abstract

The arrangement (1) has sleeve-like brush elements (2.1-2.3) arranged at a shaft and coupled with each other in a torque-proof manner. The brush elements are designed as a helix at ends (3.1-3.4) in a section, where the ends are turned to each other. The brush elements comprise stops at the ends, where the stops co-operate for torque-proof coupling of the brush elements. The brush elements are arranged at a drivable shaft in a torque-proof manner.

Description

The invention relates to a rotary brush arrangement with at least two sleeve-like arranged on a shaft rotatably coupled to each other brush elements.

Such rotary brush arrangements are z. B. from the WO 2008/043506 A2 known.

Rotary brushes are z. B. used in printing machines for cleaning printing cylinders. When printing with plates, screens or cylinders or rollers, they must be cleaned after printing. The ink must be removed from these objects before re-inking because after printing, fibers of the paper and already dried ink are on these objects. This can be done using rotary brushes. For this purpose, the surface to be cleaned is sprayed with a cleaning agent and cleaned with a rotary brush.

In the WO 2008/043506 A2 a rotary brush is described, which is arranged parallel to a printing cylinder and this cleans. This rotary brush is composed of several brush elements that can be covered with different bristle trimmings. The brush elements are rotatably coupled together using gear-like end faces.

The design of the brush elements with gear-like end faces is very complex.

Object of the present invention is to provide a rotary brush assembly with simplified rotationally fixed coupling of the brush elements.

The object is achieved by a rotary brush assembly with at least two sleeve-like arranged on a shaft rotatably coupled to each other brush elements, wherein the brush elements are each formed helically at their ends facing each other at least in one section.

Thus, the present invention rotatably coupled to each other sleeve-like brush elements, which for coupling have a helical structure on the front side, which is easy to manufacture, but still allows a secure rotationally fixed coupling between the brush elements. The preparation can be done by simply winding a bristle carrier. An additional intermediate step for producing a frontal structure for non-rotatable coupling of the elements with each other can be omitted. The present invention has as a further advantage that the trim in the transition region between the brush elements merges seamlessly due to the helical design of the ends. Furthermore, the end face may be flat, but beveled, so that also a rotationally fixed coupling can be achieved by pressing the brush elements together. Such a chamfer can also be regarded as a section of a helix, so that such an embodiment of the end face is understood as a helical formation of the end of a brush element. In other words, the end face of a brush element at least in a section on a slope. These types of structuring of the front face have the advantage that there is only one class of end faces. This allows each face to couple with each other rotatably. These end faces are formed so that each end face couples with each other, so that it does not depend on the orientation of the brush elements during installation. But it would also be conceivable to design the end faces in such a way that the coupling of the end faces depends on the orientation of the brush elements.

The ends of the brush elements can also be designed as bevelled cylinders, which can also be used for a rotationally fixed coupling by pressing corresponding end faces against each other. The coupling surfaces may have a shape that would be obtained if one sets a cutting plane at an angle α with 0 ° <α <90 ° to the longitudinal axis of the brush element. Such an embodiment is also considered to be helical.

All inventively designed types of faces provide the advantage that the rotationally fixed coupling avoids gaps between the brush elements. Thus, the bristle trim on the entire brush is consistently without gaps, which is very beneficial for cleaning by these brushes.

According to one embodiment, it may be provided that the brush elements are helical in each case at both ends, at least in one section.

The brush elements may have a helical structure both at one end and at both ends, in particular being helically formed at least in one section. As a result, any number of elements can be rotationally fixed to form a rotary brush, which allows the design of any brushes. This is particularly advantageous when rotary brush assemblies are to be used for special cleaning tasks. For example, the surface of printing cylinders in rotary printing is typically more heavily soiled in certain areas than in others. By selecting suitable brush elements with different bristles - and thus cleaning properties, a rotary brush can be assembled, which is adapted to the locally different degrees of contamination.

In one embodiment of the rotary brush arrangement, it can be provided that the brush elements each have at least one stop, at least at their mutually facing ends, the stops cooperating for the rotationally fixed coupling of the brush elements. As a result, the rotationally fixed coupling can be improved.

The brush elements can be arranged on a particular drivable shaft. The advantage of an arrangement of the brush elements on a driven shaft is to be able to drive the rotary brush assembly itself. An arrangement of brush elements on a non-driven shaft can also be used for cleaning surfaces, in particular for cleaning printing cylinders, in which case the shaft can be driven by the surface to be cleaned, in this case the impression cylinder itself. This eliminates an external drive of the rotary brush assembly, which simplifies the design and reduces costs.

The brush elements can be arranged in a rotationally fixed manner between two arresting means, in particular rings or disks, which can be arranged rotationally fixed on or on the shaft. This has the advantage that the rotary brush assembly can be assembled with little effort from the brush elements, since only the locking means with the shaft rotation and preferably must be connected in a stationary manner. By the locking means, the brush elements can be held in a rotationally fixed coupling. The locking means may also be designed as screwed or insertable into the shaft screws, pins, bolts or the like, by which the brush elements are held in a rotationally fixed connection.

Locking means formed as rings or discs may also have helical portions corresponding to the respective portions of the brush members so that the brush members at the ends can be non-rotatably connected to the shaft through these rings or discs. The rings or discs may be made of steel, preferably of V2A steel.

In the rotary brush arrangement, at least one brush element may have a bristle stock having different properties than the bristle stock of at least one other brush element. The fact that the brush elements can be covered with different types of bristles thus results in the possibility of constructing rotary brushes which are adapted to the respective cleaning process in a simple manner.

In the rotary brush arrangement, it is also possible to provide two brush elements with a bristle facing which has different properties than the other brush elements. This is particularly advantageous in cleaning tasks in which different degrees of contamination on the surface to be cleaned over the length of the surface arise. Furthermore, the wear of the brush elements can be minimized by adapting the trim to the respective cleaning task.

The two brush elements with different properties of the bristle facing can also be arranged in each case at one end of the rotary brush arrangement.

In particular, in cleaning processes in machines for printing paper tapes, there is a need for rotary brushes that have different properties at their ends, as in their midst, as accumulates more paper dust at the ends of the pressure rollers in the printing, as in the middle of the pressure rollers, so for an effective cleaning of a rotary brush assembly with pads is required, which has differently shaped bristles at the ends, as in its center.

The bristle portions of the brush members at the ends of the rotary brush assembly may have the same characteristics. This is particularly advantageous in the cleaning of printing rollers, since in this case the degree of contamination of the surfaces to be cleaned at the edges or ends of the printing cylinder is about the same size. This also has the advantage that the brush easier to install and dismantle, since it does not have to pay attention to the direction of the installation.

The brush elements of the rotary brush arrangement can have a hollow-cylindrical body in particular. Due to the hollow cylindrical configuration of the brush elements they can be easily pushed onto shafts.

Preferably, the brush elements each have a trimming, wherein the bristles of the trimming are held on a support which is arranged helically.

A brush element can be very easily produced by winding the carrier. By winding up automatically formed by the carrier helical end portion of a brush element. The carrier may be made of galvanized sheet steel, of stainless steel, V2A or V4A steel sheet, of brass or aluminum sheet.

The carrier may also be helically wound on a body according to an embodiment of the invention. In addition, it can be glued to it and / or fixed in the edge region by welding or screws. This body can be made of steel according to DIN 2391. The steel preferably has a wall thickness of about 1 - 5 mm. As a result, brush elements and, as a consequence, a rotary brush arrangement with a very good bending stiffness and good concentricity properties can be produced. Alternatively, the body may be made of carbon fiber or glass fiber reinforced plastic, i. H. CFK or GFK, to be manufactured.

The bristles of the trim of at least one brush element can be tuft-like arranged in recesses of the body. This can be achieved a lower stocking density.

The bristles of the trim of at least one brush element may be harder and / or stiffer than that of another brush element. By choosing the Hardness or rigidity, the cleaning effect and the wear of the surface to be cleaned and the brush elements and their moisture absorption can be adjusted.

The bristles of the trim of at least one brush element may have a larger diameter than that of another brush element. Thus, the cleaning effect can be optimally adapted to the type of contamination and the hardness of the surface to be cleaned.

The bristles of the trim of at least one brush element may also be spliced. For certain surfaces to be cleaned or a certain desired moisture absorption of the brush element, this may be advantageous.

The trimming of at least one brush element may also comprise a bristle mixture of different bristles. As a result, both the moisture absorption of the brush element can be adjusted, and the brush can be adapted to the respective task. For this purpose, bristles with different material, different waviness, different diameters or different lengths can be used.

The bristle length of the bristles of the brush element can also be varied. For example, the bristles may become longer toward the center of the brush element, resulting in a bulbous shape of the trim. Seen in section, the brush element may have a convex shape. The bristles can also become shorter toward the center of the brush element, so that when viewed in the (longitudinal) section, a concave shape or a double cone-like shape is created. The bristles may also have the same length in a central region and then become longer towards the end of the brush element, in particular linearly, so that the ends of the brush element are conical. In other words, the surface of the brush elements, which is formed by the ends of the bristles of the bristle trim, may be concave or convex profiled or slanted at least one end.

The rotary brush assembly can be mounted in a device for cleaning a printing cylinder so that its axis of rotation is parallel to the axis of the printing cylinder to be cleaned. This is one of the main applications of the present rotary brush arrangement, since when printing on paper webs a different, but symmetrical with respect to the center of the printing cylinder pollution occurs. The bristle length of the bristles of the brush elements and the arrangement of the brush elements can be selected so that the entire rotary brush formed by the brush elements has a bulbous, concave or biconical shape.

Further features and advantages of the invention will become apparent from the following detailed description of embodiments of the invention with reference to the figures of the drawing, which shows details essential to the invention, and from the claims. The features shown there are not necessarily to scale and presented in such a way that the features of the invention can be made clearly visible. The various features may be implemented individually for themselves or for a plurality of combinations in variants of the invention.

In the schematic drawing embodiments of the invention are illustrated and explained in more detail in the following description.

Fig. 1

eine Rotationsbürstenanordnung mit drei Bürstenelementen;

Fig. 2

eine Rotationsbürstenanordnung mit drei Bürstenelementen, wobei der Träger der Borsten jeweils auf einem Körper angeordnet ist;

Fig. 3

eine Rotationsbürstenanordnung mit drei Bürstenelementen unter- schiedlicher Länge sowie zwei Nasen zur drehfesten Kopplung;

Fig. 4a

eine Draufsicht auf ein erstes Ende eines Bürstenelements mit einer Nase zur Kopplung;

Fig. 4b

eine Seitenansicht des Bürstenelements der Fig. 4a;

Fig. 4c

eine Draufsicht auf ein zweites Ende des Bürstenelements der Fig. 4a;

Fig. 4d

einen vergrößerten Ausschnitt der Fig. 4b;

Fig. 5

einen Längsschnitt durch eine Rotationsbürstenanordnung mit einem Bürstenelement und zwei Arretierungsmitteln;

Fig. 6

einen Längsschnitt durch eine Rotationsbürstenanordnung mit einem einen Körper aufweisenden Bürstenelement und zwei Arretierungs- mitteln;

Fig. 7a

eine Seitenansicht eines als Endring ausgebildeten Arretierungsmittels;

Fig. 7b

eine Draufsicht auf das Arretierungsmittel der Fig. 7a mit teilweisem Schnitt im Bereich eines radialen Gewindes.

Show it:

Fig. 1

a rotary brush assembly having three brush elements;

Fig. 2

a rotary brush assembly having three brush elements, wherein the carrier of the bristles is arranged on a body;

Fig. 3

a rotary brush arrangement with three brush elements of different lengths and two lugs for non-rotatable coupling;

Fig. 4a

a plan view of a first end of a brush member with a nose for coupling;

Fig. 4b

a side view of the brush element of Fig. 4a ;

Fig. 4c

a plan view of a second end of the brush element of Fig. 4a ;

Fig. 4d

an enlarged section of the Fig. 4b ;

Fig. 5

a longitudinal section through a rotary brush assembly with a brush element and two locking means;

Fig. 6

a longitudinal section through a rotary brush assembly having a body having a brush element and two Arretierungs- means;

Fig. 7a

a side view of a formed as an end ring locking means;

Fig. 7b

a plan view of the locking means of Fig. 7a with partial cut in the area of a radial thread.

The Fig. 1 shows a rotary brush assembly 1 with three rotatably coupled brush elements 2.1 to 2.3. In the Fig. 1 For example, three equal length brush elements 2.1 to 2.3 are shown. Also different length brush elements 2.1 to 2.3 are conceivable. The bristle stocking 5 is shown by way of example only in a section. The brush elements 2.1 to 2.3 are hollow cylindrical and can be arranged on a shaft. The brush elements 2.1 to 2.3 have helical ends 3.1 to 3.4, which serve the rotationally fixed coupling. It can be seen that the brush elements 2.1 to 2.3 have a bristle-covered carrier 4, which is helically wound. The illustrated rotary brush arrangement 1 has at both ends in each case a helical pitch which is formed in each case by helical ends 3.3, 3.4 of the brush elements 2.1 and 2.3. Thus, this rotary brush assembly on a shaft inserted and fixed at the ends against rotation on the shaft, which will be described in more detail. The different brush elements 2.1 to 2.3 can be occupied with different bristle stocking 5. For example, the brush elements 2.1 and 2.3 may have the same bristle stock whose properties differ from that of the middle brush element 2.2 by the bristles z. B. are stiffer.

The Fig. 2 shows another embodiment of a rotary brush assembly 100 with three brush elements 102.1 to 102.3, wherein in contrast to the embodiment of Fig. 1 in each brush element 102. 1 to 102.3, a carrier 4.1 to 4.3 is wound with the bristle stocking 5 on a tubular body 6.1 to 6.3. The carriers 4.1 to 4.3 may be glued to the tubular body 6.1 to 6.3. The tubular bodies 6.1 to 6.3 are slightly shorter than the brush elements 102.1 to 102.3 and terminate before the helical ends 103.3, 103.4 of the respective brush elements 102.1 and 102.3. Thus, a helical structure projects beyond the tubular body 6.1, 6.3 at the ends 103.3, 103.4 of the rotary brush assembly 100 and can be used for non-rotatable coupling with a shaft, not shown.

The Fig. 3 shows a rotary brush assembly 200 having at the ends in each case two brush elements 202.1 and 202.3 with a bristle trim 5.1, which is different from the bristle trim 5.2 of the brush element 202.2. The rotary brush assembly 200 may, for. B. used for cleaning printing cylinders. The respectively adjacent brush elements 202.1 to 202.3 have helical sections at their ends and are thereby coupled in a rotationally fixed manner. The trimmings 5.1, 5.2 merge without gaps due to the helical design of the ends of the brush elements 202.1 to 202.3. At the ends of in Fig. 3 Brush elements shown 202.1 and 202.3 is frontally a nose 7.1, 7.2, with the coupled brush elements 202.1 to 202.3 rotatably with z. B. a ring or a disc can be attached to a shaft.

In the Fig. 4a the top view is shown on the right side of the brush element 202.3. In the Fig. 4a the nose 7.2, the carrier 204 for the bristle trim 5.1 and the body 206 are shown. The nose 7.2 is arranged off-center and thus suitable for non-rotatable coupling with a fixedly mounted on the shaft locking means.

In the Fig. 4b is the right brush element 202.3 of Fig. 3 shown. Here it can be seen that a carrier 204 is wound onto a body 206. Furthermore, the nose 7.2 is shown for the rotationally fixed coupling with a ring or a disc.

In the Fig. 4c is the top view of the left side of the brush element 202.3 of Fig. 4b shown. The beginning of the helically wound carrier 204 forms a stop 250. The side surface 251 (see also FIG Fig. 4b ) of the carrier 204 forms the end face of the brush element 202.3.

The side surface 251 runs along at least a portion along a slope, thereby creating a helical portion 252. The stopper 250 improves the rotationally fixed coupling to an adjacent, correspondingly formed brush element.

In the Fig. 4d is the one in the Fig. 4b Enlarged with A section shown enlarged. In the Fig. 4d are the bristle trim 5.1, the carrier 204 of the bristle trim 5.1, a cavity 8 for the bristle trim 5.1 and a wire 9 for attachment of the bristle trim 5.1 shown. The bristles are placed on the wire 9. The wire 9 and the bristles are fixed in the cavity 8 by the edges 260, 261 of the carrier 204 are bent inwardly towards bristles.

In the Fig. 5 a rotary brush assembly 300 is shown with only one brush element 302, which is formed helically at its ends 303.1, 303.2. Locking means 10.1, 10.2 are formed as rings which are rotatably coupled to a shaft. The locking means 10.1, 10.2 are correspondingly helical to the ends 303.1, 303.2, so that they rotatably with the Couple brush element 302. The helical configuration can be seen on the basis of the different width of the locking means 10.1 and 10.2 above and below the axis of rotation. The rings 10.1 and 10.2 are rotatably mounted on the shaft. According to the invention, at least two brush elements 302 are provided.

In the Fig. 6 is a rotary brush assembly 400 similar to that of Fig. 5 The brush element 402 additionally has a body 406 on which a carrier 404 is applied. By the carrier 404 helical ends 403.1 and 403.2 are formed. There are the same locking means 10.1, 10.2 as in the Fig. 5 for use.

In the Fig. 7a is formed as a ring locking means 10.1 shown in side view. This has a helical portion 13 on one side. Furthermore, this locking means 10.1 may have an internal thread 11 for receiving a set screw. The adjusting screw can be pressed against a shaft penetrating the locking means 10.1 and thus arresting the locking means 10.1 in a rotationally fixed manner on the shaft. With its helical portion 13, the locking means 10.1 can rest against helical ends of brush elements and fix them rotationally fixed, ie the end faces of the helical sections abut each other. Since two locking means 10.1, 10.2 press together arranged between brush elements and even rotatably connected to the shaft, the brush elements can be rotationally connected to the shaft.

In the Fig. 7b the locking means 10.1 is shown in a plan view. The inner and outer edges 13.1, 13.2 of the locking means 10.1 and the helical section 13 are shown. Furthermore, a production-related flat surface 12 is shown, on which the portion 13 and thus a slope begins. The section 13 ends at a stop 14, which improves the rotationally fixed coupling with a brush element, which also has a corresponding stop.

Claims (22)

1. Rotary brush arrangement (1, 100, 200, 300, 400) with at least two sleeve-like brush elements (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) that can be coupled to each other fixedly in rotation and arranged on a shaft, characterized in that the brush elements (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) are helically formed, in each case in at least one portion (252), at their mutually opposed ends (3.1 to 3.4, 103.3, 103.4, 303.1, 303.2, 403.1, 403.2).
2. Rotary brush arrangement according to Claim 1, characterized in that the brush elements (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) are helically formed in at least one portion (252).
3. Rotary brush arrangement according to either of the preceding claims, characterized in that the brush elements (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) each have at least one stop (250) at least at their mutually opposed ends (3.1 to 3.4, 103.3, 103.4, 303.1, 303.2, 403.1, 403.2) and the said stop(s) (250) interact so as to couple the brush elements (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) fixedly in rotation.
4. Rotary brush arrangement according to any one of the preceding claims, characterized in that the brush elements (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) are arranged fixedly in rotation on a shaft, in particular a driven shaft.
5. Rotary brush arrangement according to any one of the preceding claims, characterized in that the brush elements (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) are arranged between two locking means (10.1, 10.2), in particular rings or discs, which can be arranged fixedly in rotation on the shaft so that the brush elements (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) can be arranged fixedly in rotation on the shaft.
6. Rotary brush arrangement according to Claim 5, characterized in that the locking means (10.1, 10.2) have helical portions (13) corresponding with the helical portions (252) of the brush elements (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402).
7. Rotary brush arrangement according to any one of the preceding claims, characterized in that the characteristics of the bristle covering (5.1) on at least one brush element (202.1, 202.3) are different from those of the bristle covering (5.2) on at least one other brush element (202.2).
8. Rotary brush arrangement according to any one of the preceding claims, characterized in that two brush elements (202.1, 202.3) have a bristle covering (5.1) with different characteristics from those of the bristle covering on the remaining brush elements (202.2).
9. Rotary brush arrangement according to Claim 8, characterized in that the two brush elements (202.1, 202.3) with a bristle covering (5.1) with different characteristics are arranged at the ends of the rotary brush arrangement (200).
10. Rotary brush arrangement according to Claim 9, characterized in that the bristle coverings (5.1) of the brush elements (202.1, 202.3) at the ends of the rotary brush arrangement (200) have the same characteristics.
11. Rotary brush arrangement according to any one of the preceding claims, characterized in that the brush elements (102.1 to 102.3, 202.1 to 202.3, 402) have a body which is in particular a hollow cylindrical body (6.1 to 6.3, 406).
12. Rotary brush arrangement according to any one of the preceding claims, characterized in that the brush elements (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) each have a bristle covering (5, 5.1, 5.2), the bristles of said covering (5, 5.1, 5.2) being held on a carrier (4, 4.1 to 4.3, 204, 404) which is helically arranged.
13. Rotary brush arrangement according to Claim 12, characterized in that the carrier (4.1 to 4.3, 204, 404) is helically applied to the body (6.1 to 6.3, 206, 406).
14. Rotary brush arrangement according to any one of the preceding claims 1 to 11, characterized in that the bristles of the covering are arranged in tufts in recesses in the body.
15. Rotary brush arrangement according to any one of the preceding claims, characterized in that at least one brush element (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) has harder and/or stiffer bristles than another brush element.
16. Rotary brush arrangement according to any one of the preceding claims, characterized in that at least one brush element (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) has bristles of larger diameter than those of another brush element (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402).
17. Rotary brush arrangement according to any one of the preceding claims, characterized in that the bristles of at least one brush element (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) are spliced.
18. Rotary brush arrangement according to any one of the preceding claims, characterized in that at least one brush element (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) carries a mixture of different bristles.
19. Rotary brush arrangement according to any one of the preceding claims, characterized in that the surface of a brush element (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) formed by the ends of the bristles of the covering has a concave profile.
20. Rotary brush arrangement according to any one of the preceding claims, characterized in that the surface of a brush element (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) formed by the ends of the bristles of the covering has a convex profile.
21. Rotary brush arrangement according to any one of the preceding claims, characterized in that the surface of a brush element (2.1 to 2.3, 102.1 to 102.3, 202.1 to 202.3, 302, 402) formed by the ends of the bristles of the covering is bevelled at at least one end.
22. Apparatus for cleaning a printing cylinder with a rotary brush arrangement (1, 200, 300, 400) according to any one of the preceding claims whose rotational axis is arranged parallel with the axis of the printing cylinder to be cleaned.

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