ES2689915T3 - Braking brush with brush trim - Google Patents

Abstract

Braking brush to retard and / or guide and / or step on signatures (10) in components for processing signatures (10) in the form of folded or unfolded sheets, the braking brush (1) comprising a brush body (2) ) with a trim surface (3) and a brush trim (4), which is fixed on the trim surface (3), with a trim thickness d and the brush trim (4) presenting an active surface (5) , and the braking brush (1) with its active surface, for braking and / or guiding and / or stepping on a signature (10), at least partially in operative connection with the signature (10), characterized in that the brush body (2) It has at least partially at least one projection (6) which, in extension of the thickness of the fitting, d protrudes outwards with a height of projection h above the fitting surface (3).

Description

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DESCRIPTION

Braking brush with brush trim

The invention relates to a braking brush for retarding and / or guiding and / or stepping signatures on components for processing folded or unfolded sheet-shaped signatures, the braking brush comprising a brush body with a trim surface and a brush trim, which is fixed on the trim surface, with a trim thickness d and the brush trim having an active surface, and the brake brush with its active surface, for braking and / or guiding and / or step on a signature, at least partially in operative connection with the signature.

In components for processing folded or unfolded sheet-shaped signatures, such as, for example, folding mechanisms of rotary printing machines, various locations are presented, where they must be guided, braked and / or, for example, during a folding procedure At least partially stepped on signatures that were produced by separating a print support band. In this case, brake brushes are frequently used, such as in the area of the folding cylinders or in the area of the second longitudinal folding device, which is also called Third Fold.

Due to the numerous fields of use, the present invention will be described in the example of the second longitudinal folding device, without the application of the braking brushes according to the invention being limited thereto.

In addition, it is noted that the use of the braking brushes according to the invention is also possible in all other components, in which folded or unfolded sheet-shaped signatures can be processed, which, for example, can also result of printed sheets.

From DE 199 21 169 C2 a device is known for braking paper sheets, in which the signatures, respectively the sheets, which enter the so-called Third Fold are braked and during the folding procedure they are stepped on by means of activated brake brushes with Short-stroke electromagnets. In this, the braking brushes enter into operative connection with the incoming or folded signatures, whereby the braking brushes, and in this particularly the lining of the brushes, are subject to wear.

Wear of this type also appears in braking devices, in which the braking brush remains in a more or less static position during the braking or stopping procedure, therefore, in the case of braking devices of this type with position of the unchanging brush during the braking procedure, the braking brushes must be readjusted successively in the operation, which generally necessitates an adjustment, respectively readjustment, of the braking brushes by the operating personnel.

Publication DE 10 2013 206907 A1 discloses a device according to the preamble of claim 1, as well as a process according to the preamble of claim 12.

Also in the device described in DE 199 21 169 C2, the brake brushes are subject to wear which, however, due to the very high dynamics and intelligible intelligence of such a braking device can be further regulated in shape. automatic by means of synchronization or modification of the brake brush stroke.

However, it is not possible for the operating personnel in the two braking equipment manufacturers with braking brushes mentioned above to control the current degree of deterioration of the brush lining during the operation of the braking equipment, since for this purpose the equipment it must stop and the brake brushes must be made accessible or at least visible, which leads to corresponding downtimes. Therefore, the brake brushes are replaced preventively frequently in turn and, consequently, possibly despite a relatively high remaining life, since brush wear generally depends on the substrate used of the signature produced from it. .

The invention is therefore based on the objective of creating a solution that makes it possible to evaluate the state of wear of the brush lining without accessibility or visibility of the braking brushes.

This objective is achieved by means of a device according to claim 1 and / or a process according to claim 12. The device according to the invention comprises a braking brush with a brush body, the brush body presenting at least partially at least a projection which, in extension of the trim thickness d, protrudes with a projection height h above the trim surface.

Such a manufacturing of a braking brush has the advantage that in the case of corresponding wear, that is, when the trim thickness is worn, referred to the height of the projection, at a lower limit value, the projection enters minimally in contact with the cover layer of the signature, so that this can be recognized in the raised signature, finished processing, for example, a signature provided with a

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second fold, by very fine marks, so that the equipment can be operated without stopping until the wear limit is reached. With a corresponding design of the projection only minimum marks are recognized in the folded signature. Particularly in the case of the use of braking equipment with highly dynamic moving brake brushes, as described, for example, in DE 199 21 169 C2, only very small marks appear, which consequently do not affect The quality of the final product.

In an advantageous configuration of the invention, the projection is formed directly in the area of the brush lining, so that the braking brush according to the invention according to the invention does not require additional construction space.

In another advantageous configuration of the invention, the projection is formed outside the zone of the brush lining, such as, for example, in areas of the brush body adjacent to the brush lining, so that a continuous lining surface is obtained , flat, on which a velvet lining that serves as a brush lining is applicable.

In a particularly advantageous configuration of the invention, the braking brush has a plurality n of projections with heights h which in each case differ from each other. With such a configuration it is possible not only to be able to detect the mere arrival at a wear limit, but also to be able to recognize the degree of wear by means of the amount of contact traces.

The same advantage is also possible with another advantageous configuration of the invention, in which at least one projection has a varying cross-sectional height h. In this case, the degree of deterioration of the brush lining can be detected based on the size and / or shape of the marks.

The same objective is achieved with a particularly advantageous configuration of the invention, in which at least one projection has different colors in extension of its height. In this way, particles of color can be transmitted to the signature in minimum quantity and, therefore, not perceptible or practically not perceptible to the naked eye, so that based on the color of the minimum marks on the signature the reading of the state of Current deterioration of the brush lining.

In a very particularly advantageous configuration of the invention, at least one or at least one projection has an electrical detectability relevant to damage, respectively pertinent to wear, so that the state of wear cannot or cannot only be recognized based on marks on the signature, but that can also be registered electronically and transmitted to the control of the corresponding component and issued in a command unit or a status indication.

Further developments of the invention result from the subclaims and the following description. Different manufacturing examples of the invention will be explained in detail, without being restricted thereto, based on drawings. They show in this:

Figure 1 a braking brush, including a signature to stop, of the prior art

2 a braking brush according to the invention with a projection in the area of the brush lining

Figure 3 a braking brush according to the invention with a projection outside the zone of the brush lining

Figure 4 a braking brush according to the invention with a plurality of projections with cross sections which,

in extension of height h, they vary

Figure 1 schematically shows a braking brush 1 according to the state of the art in operative connection with an incoming signature 10, to be braked. The braking brush 1 is composed of a brush body 2 which, for example, can be produced from plastic in the injection molding process. Possible housing devices with which the braking brush 1 can be attached to supports, etc., are not shown in Figure 1. The brush body 2 has a trim surface 3, on which the brush trim 4 is fixed. In this, the brush fittings 4 are known in the form of bristle bundles inserted in the brush body 2 or in the form of , for example, glued velvet tapes. The brush lining 4 forms with the bristle termination its active surface 5 which generally runs parallel to the lining surface 3. The brush lining 4 has a thickness of lining d which generally in the unwashed state of the brush of braking 1 is approximately constant over the extent of the brush lining 4, since generally the active surface 5 is arranged parallel to the garrison surface 3.

But it is also possible that the brush trim 4 has a variable trim thickness d, in that case the trim thickness 3 existing at the respective location of the brush trim 4 must be determined perpendicular to the trim surface 3.

As shown in Figure 1, the bristle ends opposite the fitting surface 3 form the active surface 5 which is in operative connection with the signature 10 to be braked, guided or stepped on. For a better

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recognition is shown in Figure 1, however, a minimum displacement between the active surface 5 and the bristle end, which is only done for reasons of better recognition.

To stop the incoming signature 10, the braking brush 1 presses the bristle lining on the active surface 5 against the signature 10 that is supported by a counter-support, which is not represented in Figure 1, such as a table of creased. Due to the contact of the brush lining 4 with the signature 10 which is composed of, for example, paper or cardboard, the brush lining 4 wears out, so that the thickness of the lining d decreases as production time progresses. The degree of wear can be recognized in this only when the brush trim 4 is visible or accessible, so that the remaining trim thickness d can be recognized.

Figure 2 shows a braking brush 1 according to the invention for retarding and / or guiding and / or stepping signatures 10 on components for processing signatures 10 in the form of folded or unfolded sheets, the braking brush 1 comprising a body of brush 2 with a trim surface 3 and a brush trim 4, which is fixed on the trim surface 3, with a trim thickness d and the brush trim 4 presenting an active surface 5, and the brake brush 1 being with its active surface 5, for braking and / or guiding and / or stepping on a signature 10, at least partially in operative connection with the signature 10, the brush body 2 presenting at least partially at least one projection 6 which in extension of the thickness trim d protrudes outwards with a projection height h above the trim surface 3.

The braking brush 1 shown by way of example in Figure 2 has only one elevation that is formed in the area of the brush lining 4. However, it is also possible, although not shown in Figure 2, that in the zone of the brush trim 4 and, consequently, a plurality of elevations is formed on the trim surface 3.

In the braking brush 1 according to the invention shown by way of example in Figure 2, the height of the projection h is made smaller than the thickness of the fitting d. However, it is also possible to make the projection height h equal to larger than the trim thickness d. This is particularly advantageous when the projection 6 has a very thin cross section in extension of its height h in the area of the trim thickness d, so that a tip of the projection 6 designed in this way is used to stop, guide or brake the signature 10.

The configuration, which is represented in FIG. 2, of the braking brush 1 according to the invention has the advantage that the projection 6 just comes into contact, in the area of the side facing the active surface 5, with the signature 10 in the in case of really wear of the brush lining 4 and, consequently, in the case of reduced lining thickness d.

The projection 6 may, for example, have the shape of a cone, a truncated cone, as shown in Figure 2, a cylinder or also the shape of a cubic body, preferably the cross-section of the projection 6 extending perpendicular to the entry address 11 equal to or less than the extension in the entry address 11.

The projection 6 can be produced of the same material as the brush body 2, which is particularly convenient in the case of brush bodies 2 produced in the injection molding process, due to the advantageous production costs. But the projection 6 can also be of a material different from the material of the brush body 2, whereby the wear and / or marking behavior can be adapted to the respective substrate. Accordingly, it is also possible to manufacture the projection 6 as a detachably fixed body and, therefore, replaceable in the brush body 2.

The projection height h depends essentially on the allowable measure of wear, with which the braking brush 1 is still fully functional. Usually, the trim thickness d is greater by a factor of approx. 1.1 to approx. 10 than the projection height h. Therefore, already after a reduction in the thickness of the garnish by approx. 10% corresponding wear can be detected. It is also possible - depending on the field of use, the structure of the brush lining 4, etc. - that only with approx. 10% of the original trim thickness can detect a corresponding wear.

Figure 3 shows an example of manufacturing a braking brush 1 according to the invention, in which at least one projection 6 is formed outside the zone of the brush lining 4. By way of example it is represented in Figure 3 a braking brush 1 according to the invention with two projections 6 formed next to the brush fitting 4, but it is also possible that a projection 6 is formed only on one side of the brush fitting 4.

The manufacturing shown in Fig. 3 offers the advantage that the trim surface 3 is not interrupted by at least one projection 6 and, therefore, can be manufactured continuously. This is advantageous when the brush lining 4 is manufactured, for example, as an applicable velvet lining, since in practice frequently self-adhesive velvet bands are glued on the brush body 2. But the lining of

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Brush 4 can also be manufactured as bristle beams, so that with this variant a brush lining 4 as uninterrupted bristle bundles is also possible.

Figure 4 shows a braking brush 1 according to the invention having a plurality n of projections 6 with projection heights h a hn which in each case differ from each other. In the example shown in Figure 4, two projections 6 are made on the fitting surface 3, a first projection 6-1 having a first projection height h and a second projection 6-2 having a second projection height h2.

Although not shown in Figure 4, the number n of projections 6 can also be correspondingly increased, so that, for example, three, four or more projections are used 6. In this it is irrelevant if the projections 6 are arranged on the surface of fitting 3 or outside of the fitting surface 3, since also in the case of arrangement of the projections 6 outside the fitting surface 3 these can be manufactured staggered at their height of projection h.

Such a configuration has the advantage that the degree of brush wear can be detected accordingly, since as the wear progresses the number of marks increases.

Thus, the example shown in Figure 4 can be manufactured in such a way that with the first projection 6-1 with the height h1 it is detected, respectively, that it is below a first wear limit and that with the second projection 6 -2 with a height h2 be detected, respectively mark, that a lower critical wear limit was reached absolutely critical.

However, a detection, respectively marking, of this type of degree of wear can also be carried out in the form if at least one projection 6 has an extension of the projection height h a varying cross section. In this case, the degree of wear of the brush lining 4 and, consequently, also of the projection 6 can be recognized by the size and / or shape of the marks on the signature 10.

However, according to the invention it is also possible that at least one projection 6, in case of damage or wear of the area of the projection 6 oriented towards the active surface 5, has at least one characteristic that varies.

Thus, for example, at least one projection 6 can have an extension of the projection height h on its outer surface and / or by means, respectively, with its material different colors. In case of contact of the projection 6 with the signature 10, therefore, particles of color can be transmitted in minimum quantities to the signature 10, so that on the basis of the .... on the signature 10 they are recognized, particularly with the help of optical auxiliary means, the color of the marks and, consequently, the degree of wear.

In a particularly advantageous configuration of the invention, the characteristic of at least one projection 6 is modified in case of wear and / or damage so that the at least one projection 6 in question has an electrical detectability relevant to damage, respectively wear .

This can take place in the way that an electrical conductor in the form of a loop is incorporated in the projection 6, to which voltage is applied, so that in the original state of the projection 6 an electric current flows through the incorporated electrical conductor , although very small that can be detected correspondingly and the corresponding information can be transferred to the control of the component in question and issued, for example, in a control unit or a display unit by means of a signal.

In the case of a corresponding wear of the projection 6, therefore, the conductive loop is also worn, so that the conductive loop interrupts correspondingly, so that the flow of current stops.

This interruption of the current flow is detected by the control of the component, so that a new signal or additional signal can be emitted, for example, in a control unit or in a component display unit.

The invention comprises, apart from the braking brush 1 according to the invention, a process for retarding, guiding or stepping on signatures 10 by at least one braking brush 1 according to the invention in each of the configurations according to the invention, being placed, to delay , guide or step on, the braking brush 1 according to the invention with its active surface 5 in operative connection with the signature 10 to delay, guide or step on and, consequently, subjecting the brush lining 4 to wear, detecting wear brush by the coming into contact of the projection 6 with the signature 10, respectively marking this, the projection 6 coming into contact with the signature 10, so that on a corresponding signature 10 there is at least one mark noticeable only with auxiliary means Optical Here, optionally, based on the size and / or shape and / or color of the mark, a degree of wear of the braking brush 1, respectively of the brush lining 4, can be detected.

This recognition, respectively this detection, of the marks and, consequently, of the brush wear can be done visually with no optical auxiliary means by the handling personnel. However, it is also possible to place, seen in the direction of passage of the signatures 10 through the ... in the direction of the passage

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of the component, downstream of the braking brush 1 an optoelectronic recording equipment, for example, a CCD camera, to automatically detect the marks, which are almost not noticeable to the naked eye, on the corresponding signatures 10 and transmit this in a corresponding signal to component control.

In this way, the degree of brush wear can be detected and evaluated based on the size and / or the shape and / or the color and / or the amount of the mark, respectively of the marks.

In another process according to the invention, the side, which is oriented towards the active surface 5, of the at least one projection 6 has a structure, so that this changes at least one characteristic in case of wear.

Thus, for example, an electrical conductor can be integrated into the projection 6, for example, in the form of a conductive loop, to which a voltage is applied, so that with an intact projection 6 a preferably minimal electrical current flows. A current flow of this type can be detected by the control of the component and emitted as a corresponding signal to a control or display unit. In the case of a corresponding wear of the projection 6, the conductive loop is cut, so that electric current can no longer flow. This interruption of the current flow is also recorded by the control of the component and can be emitted, respectively, as a signal characterizing wear to a control or display unit.

List of reference characters

1 brake brush

2 Brush body

3 Lining surface

4 Brush lining

5 Active surface

6 outgoing

10 Signature

11 Input Address

d Garnish thickness

h Overhang height

n Number of outgoing

Claims (15)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 1. Brake brush for retarding and / or guiding and / or stepping on signatures (10) in components for processing signatures (10) in the form of folded or unfolded sheets, the braking brush (1) comprising a brush body (2) with a trim surface (3) and a brush trim (4), which is fixed on the trim surface (3), with a trim thickness d and the brush trim (4) presenting an active surface ( 5), and the braking brush (1) with its active surface, for braking and / or guiding and / or stepping on a signature (10), at least partially in operative connection with the signature (10), characterized in that the body The brush (2) has at least partially at least one projection (6) which, in extension of the trim thickness d, protrudes outwardly with a projection height h above the trim surface (3). 2. Brake brush according to claim 1, characterized in that the projection height h is less than the maximum trim thickness d. 3. Brake brush according to claim 2, characterized in that the trim thickness d is greater by a factor of approx. 1.1 to approx. 10 than the projection height h. 4. Braking brush according to one of claims 1 to 3, characterized in that at least one projection (6) is formed in the area of the brush lining (4). 5. Brake brush according to one of claims 1 to 3, characterized in that at least one projection (6) is formed outside the area of the brush lining (4). 6. Brake brush according to one of claims 1 to 5, characterized in that the brush lining (4) is made as bristle bundles or as a velvet lining. 7. Brake brush according to one of claims 1 to 6, characterized in that the brake brush (1) has a plurality n of projections (6) with projection heights h1 to hn which in each case differ from each other. 8. Brake brush according to one of claims 1 to 7, characterized in that at least one projection (6) has an extension of the height of the projection h with a cross section that varies. 9. Brake brush according to one of claims 1 to 7, characterized in that at least one projection (6), in case of damage or wear of the projection area (6) oriented towards the active surface, has at least one feature that varies. 10. Brake brush according to claim 9, characterized in that at least one projection (6) has an extension of the projection height h different colors on its external surface and / or by means of its material. 11. Brake brush according to claim 9, characterized in that at least one projection (6) has an electrical detectability relevant to damage, respectively relevant to wear. 12. Process for retarding, guiding or stepping on signatures (10) by at least one braking brush (1) according to one of claims 1 to 11, putting the braking brush (1) to retard, guide or step on. with its active surface in operative connection with the signature (10) to be delayed, guided or stepped on and, consequently, by subjecting the brush lining (4) to wear, characterized in that the brush wear is detected by the arrival on contact of the projection (6) with the signature (10). 13. Process according to claim 12, characterized in that at least one detectable mark in the signature (10) is brought into contact with the signature (6) with the signature (10). 14. Process according to claim 13, characterized in that based on the size and / or the shape and / or the color and / or the amount of the mark, respectively of the marks, a degree of brush wear is detected. 15. Process according to claim 12, characterized in that due to the change of at least one characteristic of at least one projection (6) the degree of brush wear is detected. Fig. 1 State of the Art image 1