EP2047974B1 - Roller assembly - Google Patents

Abstract

The roller arrangement comprises two rollers, which are rotatably stored in carrier blocks (2,3). An adjusting unit (1) is provided between the carrier blocks at both sides of the rollers, by which the rollers are adjustable to each other in its axial distance (AS). The adjusting unit comprises multiple distance blocks (101a,101b), which have different heights (H) from each other. The distance blocks are arranged on a common adjusting plate (100).

Description

The invention relates to a roller assembly having two rollers rotatably mounted at their ends in bearing blocks, wherein on both sides of the rollers adjusting devices are provided between the bearing blocks, by means of which the rollers are adjustable in their axial distance from one another.

Such roller arrangements with an axial distance adjusting device, the so-called nip, are used, for example, in so-called Union embossing rollers, which consist of a steel roller pair and whose one roller carries a positive engraving, the male and the counter roller the negative engraving, the die. These embossing rolls are usually guided by means of spherical roller bearings in the jewels to each other and rotatably supported.

For the embossing operation, it is necessary that the rollers are operated with an exactly set axial distance from each other, since this exact axial distance is necessary to each other, so that the material to be embossed is not overwritten and / or the desired embossing height is achieved.

The known adjusting devices are usually based on a riving knife with a more or less far in a gap retractable wedge or have a fixed threaded bolt and a so-called Spaltinstellmutter, between the bearing blocks of the rolls are arranged, for example, on the DE 10 2004 037 889 B4 . DE 10 2004 004 515 A1 and the DE 297 16 031 U is referenced.

However, such known adjusting devices are either prone to changes in the once selected setting or the change of the embossing gap is elaborate.

A change in the embossing gap and thus the axial distance between the rollers is necessary, for example, if paper layers are to be embossed together and, in the course of a product conversion, e.g. from a two-ply to a three-ply product. Even in the case of progressive wear, an adjustment of the nip may be necessary.

It is understood that the inventively proposed roller assembly is not limited to embossing rollers, but arbitrarily in roller assemblies of the type mentioned, such. can also be used in calenders, printing units and the like.

The object of the invention is to provide a roller assembly of the type mentioned above, which ensures a permanent determination of the desired axial distance of the rollers to each other and fastest possible change of the nip allows to keep set-up times as low as possible.

This object is achieved by the inventively proposed roller assembly with the features of claim 1.

Advantageous embodiments and modifications of the invention are the subject of the dependent claims.

The invention proposes that the adjusting devices comprise a plurality of spacer blocks, which have different heights from each other and the bearing stones with the interposition of one of the spacer pads to each other can be applied are, wherein the spacer blocks are further arranged on a common adjusting plate which is gradually adjustable in such a way that in each case one of the spacer blocks for engagement with the bearing blocks is selected and determines the axial distance between the rollers.

The proposal of the invention is therefore based on maintaining a meaningful for the respective requirements number of spacer blocks with coordinated different heights in the adjusters, each of the provided spacer blocks due to its specially selected height represents a certain axial distance of the rollers to each other and by appropriate adjustment of the Adjustment plate can be selected and determines the appropriate axial distance between the rollers when bearing on the jewels.

For example, it may be provided to provide three or four different spacer blocks, each with a stepped height difference of, for example, 1/100 mm, so that four axial distances of the rollers which are different from one another by 1/100 mm are adjustable. For the respective adjustment of the axial distance, it is only necessary to drive apart the two rollers using the provided in the roller frame pressure unit to adjust the adjustment plate so that the desired spacer block is moved to its working position and then bring the rollers together again, the Collars of the same to each other with the interposition of the selected spacer block come to rest and adjusts the desired axial distance between the rollers.

The time required for the change of the axial distance is thus minimal and achieves maximum fault tolerance.

Moreover, since the set axial distance between the rollers based on a contact of the jewels with the interposition of the selected spacer pad, this axial distance is also maintained permanently reliable and can not adjust automatically.

According to a further proposal of the invention, the spacer blocks are fixed with their adjusting plate to a bearing block and the opposite bearing stone is equipped with at least one further spacer block to which the selected spacer block of the adjustment plate can be applied to form the axial distance between the rollers. Consequently, at least one spacer block provided on the opposite bearing block can be understood as an embodiment in which this spacer block is secured to the bearing block, i. is rigidly connected, or it is provided on both jewels a plurality of spacer blocks with different heights, so that the number of different adjustable axial distances is multiplied accordingly.

This at least one spacer block can also be fastened with the interposition of a spacer plate on the bearing block. The spacer plate is mounted with the pre-assembled spacer block on the bearing stone surface of the jewel, the dimensions, in particular the height of the spacer plate and the height of the spacer block and possibly used for use spacer plates between spacer block and spacer plate are adjusted to the previously calculated dimensions.

According to one proposal of the invention, the adjustment plate may be disk-shaped and rotationally adjustable about a central axis so that it can accommodate a plurality of different spacer blocks on its 360 ° pitch and a single spacer block is selected by corresponding rotation of the adjustment plate about the central axis.

So that between the adjusting plate and the attachment serving stone no Einstellgebnis impairing game is present, the adjustment plate is preferably by means of a central axis defining fastening screw and the interposition of a spring assembly resiliently but without play and firmly attached to the bearing block.

According to a further embodiment of the invention, the adjustment plate is designed as an approximately cuboid component and longitudinally adjustable on the bearing block supported, so that the various spacer blocks along the longitudinal extent of such an adjustment plate can be mounted in a row and can be selected by longitudinal adjustment of the adjustment plate. In this case, for example, be provided to hold the adjusting plate in guide rails longitudinally displaceable.

Furthermore, it can be provided that the adjustment plate has a latching device, e.g. a cooperating with corresponding recesses detent pin comprises, which defines the individual adjustment steps and engages in accordance with selection of one of the spacer blocks in the exact position. This greatly simplifies the accuracy of the adjustment and the ease of operation.

In order to ensure a particularly efficient production and also to ensure a fine adjustment of the nip during commissioning of the rollers on site, may be provided in addition to form the spacer blocks of the adjuster with the same height and required for the determination of different axial distances of the rollers to each other form different heights of the spacer blocks by lining with shims of different heights or different number of shims of the same height.

In addition, the adjustment plate may be peripherally equipped with means for attacking a Verstellwerkzeuges to facilitate the change of the adjustment of a selected spacer block to the next with little effort.

The number of adjustment is determined by the number held up distance blocks and selected depending on the available space and the production conditions. An adjustment is provided in rapport rollers only within the limits that allow the adjustment of the axial distance of the rollers without correction of the repeat wheels. This value is in practice about 0.05 to 0.06 mm and corresponds for example to the necessary adjustment range when embossing multi-layered Paper webs of different number of layers, for example, two-, three- and four-ply webs.

Figur 1

in schematisierter Darstellung die Seitenansicht einer Walzenanordnung gemäß der Erfindung,

Figur 2

eine um 90° gedrehte Ansicht der Darstellung aus Figur 1,

Figur 3

die Einzelheit Z in Figur 1 in vergrößertem Maßstab,

Figur 4

den Schnitt A-A gemäß Figur 2,

Figur 5

die Ansicht auf eine weitere Walzenanordnung gemäß der Erfindung,

Figur 6

den Schnitt A-A gemäß Figur 7,

Figur 7

eine weitere Ansicht der Walzenanordnung gemäß Figur 5 aus einer um 90° gedrehten Betrachtungsrichtung,

Figur 8

eine Einzelheit der Figur 7 in stark vergrößertem Maßstab, und

Figur 9

eine Walzenanordnung aus dem Stand der Technik.

Further embodiments and details of the invention are explained below with reference to embodiments in the drawing. Show it:

FIG. 1

in a schematic representation of the side view of a roller assembly according to the invention,

FIG. 2

a rotated by 90 ° view of the representation FIG. 1 .

FIG. 3

the detail Z in FIG. 1 on an enlarged scale,

FIG. 4

the section AA according to FIG. 2 .

FIG. 5

the view of another roller assembly according to the invention,

FIG. 6

the section AA according to FIG. 7 .

FIG. 7

a further view of the roller assembly according to FIG. 5 from a viewing direction rotated by 90 °,

FIG. 8

a detail of FIG. 7 on a greatly enlarged scale, and

FIG. 9

a roller assembly of the prior art.

In the FIG. 9 a roller arrangement, for example an embossing roller arrangement for embossing paper layers, is shown. It consists of parallel rollers 4, 5, which are each rotatably mounted at their ends in jewels 2, 3 using unspecified marked spherical roller bearings.

Between the bearing blocks 2, 3 of the rollers 4, 5 extend on both sides of the rollers 4, 5 each adjusting devices 1, which in the prior art according to FIG. 9 For example, be formed by a fixed threaded bolt and a so-called Spaltinstellmutter. By means of these adjusting devices 1, the distance between the bearing cages 2, 3, which are connected via an adjusting device 1, and thus the axial distance AS of the rollers 4, 5, is adjustable from one another. This axial distance AS determines the remaining between the rollers 4, 5 so-called nip S, which is for example in embossing rollers for the embossing result of crucial importance and therefore must be precisely adjustable.

The FIGS. 1 to 4 show an adjusting device 1 according to the invention, which is characterized by particularly simple design, fast changeover times and ease of use and gem instead of the threaded bolt and Spaltinstellmutter. FIG. 9 is provided.

The adjusting device 1 for the axial distance AS of the bearings 4, 5 mounted in the bearing blocks 2, 3 comprises a fixing plate 100 fastened to the bearing stone surface 20 by means of a fastening screw 102 and a spacer plate 110 fastened by means of fastening screws 112 to the bearing stone surface 30 of the opposite bearing stone 3. On the spacer plate 110, a spacer block 111 is fixed by means of a mounting screw 113 and adjusted by interposing a plurality of spacer plates 114 to a desired height, see in particular FIG. 3 ,

The attached to the upper bearing block 2 adjustment plate 100 is disc-shaped, see FIG. 4 and carries in the manner of a revolver recording on a 90 ° division a total of four spacer blocks 101 a, 101 b, 101 c, 101 d, which are each secured by means of mounting screws 103 on the adjustment plate 100. The attachment of said spacer blocks 101 a, 101 b, 101 c, 101 d is done with the interposition of spacer plates 104 on the adjustment plate 100, so that it is possible, despite equal heights of the individual spacer blocks 101 a, 101 b, 101 c, 101 d a different total height H . with the individual spacer blocks 101 a, 101 b, 101 c, 101 d projecting on the underside of the adjustment plate 100 to provide.

In this case, each individual spacer block 101a, 101b, 101c, 101d is adjusted by interposing a corresponding number of spacer plates 104 such that a different overall height H is set at each individual spacer block 101a, 101b, 101c, 101d, for example, starting with the spacer block 101a following each has a height H of 1/100 mm.

The adjusting plate 100 is also fixed by means of the aforementioned fastening screw 102 with the interposition of a spring assembly 105 spring and clearance on the bearing block 2, wherein the fastening screw 102 extends through a centrally disposed bore of the adjustment plate 100 therethrough, so that the adjustment plate 100 to the mounting screw 102nd is rotatable. The fastening screw 102 thus defines a central axis of rotation Z for the adjusting plate 100.

Since the spacer block 111 fixedly secured to the opposite and fixed to the bearing block 3 spacer plate 111 can be selected by rotation of the adjustment plate 100 about its central axis of rotation Z each one of the spacer blocks 101a, 101b, 101c, 101d and placed in a position be, in which he is aligned with the spacer block 111 and when moving together of the rollers 4, 5 and their jewels 2, 3 on the rigidly fixed spacer block 111 comes to rest.

In accordance with the height H prevailing at the respectively selected spacer block 101 a, 101 b, 101 c, 101 d and set by means of the underlayed spacer plates 104, a defined axial distance AS thus arises between the bearing blocks 2, 3 and thus between the rollers 3, 5, so that the nip S is exactly defined.

If this nip S is to be changed, first the two rollers 4, 5 are moved apart with the aid of a drive mechanism not shown, ie their axial distance AS is increased until the spacer block, here 101 a, no longer abuts the spacer block 111 and subsequently the adjustment plate 100 is rotated about its central axis Z according to arrow D until the desired, another height H having spacer block 101b to 101d is brought to the fixed spacer block 111 to coincide , Subsequently, the rollers 4, 5 are moved together with their jewels 2, 3 again until the selected spacer block 101a to 101d rests against the spacer block 111 and set the desired axial distance AS and nip S.

The rotation of the adjustment plate 100 about the axis of rotation Z is facilitated for an operator in that the adjustment plate 100 in the region of its circumference has a plurality of radially inwardly facing holes 108 into which a rotary tool, such as a lever can be inserted, so that below for example, in the direction of arrow D according to FIG. 4 a rotation of the adjustment plate 100 can be made with little effort.

In order to facilitate finding the particular position of the selected spacer pad 101a-101d with respect to the fixed spacer block 111, the individual twisting steps of the adjustment plate 100 are indicated by supporting a spring-loaded detent pin 106 which, upon reaching the exact spacer block 101a until 101d assigned position engages in a corresponding hole in the bearing block 2 and thus ensures an exact angle adjustment of the adjustment plate 100.

It is understood that instead of the four shown here on the adjustment plate 100 mounted spacer blocks 101 a to 101 d, a smaller or higher number of such Einstellklötze may be provided, if required by the respective circumstances. Further variations of the adjustable axial distances AS can be achieved by providing not only a single fixed spacer block 111 on the bearing block 3, but also a plurality of spacer blocks having step heights and having different heights can also be provided here so that the total number of settings is multiplied accordingly.

Finally, it is also possible to dispense with the intermediate layer of spacer sheets 104, 114 if the individual spacer blocks 101 a, 101 b, 101 c, 101 d and 111 can be manufactured to the respectively necessary overall height dimensions.

The FIGS. 5 to 8 show a comparison with the above-described embodiment of the invention modified embodiment in which functionally identical parts have been given the same reference numerals and will not be explained again separately, unless this is necessary for understanding the invention.

In contrast to the adjustment plate 100 according to the FIGS. 1 to 4 , which is disc-shaped in the manner of a turret plate and is rotatably supported about a central axis Z on the bearing block 2, the adjusting plate 100 according to the FIGS. 5 to 8 an elongated, approximately cuboid shape and is longitudinally displaceable in the direction of arrow V according to FIG. 5 held in guide rails 109, which in turn are fixed by means of fastening screws 102 on the upper bearing block 2.

Accordingly, it is also possible in this illustrated embodiment, by stepwise displacement, here longitudinal displacement several, here three different heights having spacer blocks 101 a, 101 b, 101 c depending on the desired axial distance AS of the rollers 4, 5 to each other on the fixed spacer block 111 of the jewel. 3 to set the axial distance AS to the plant.

Also in this embodiment, the exact step size of the sliding movement in the direction of arrow V or opposite to it via a spring-loaded locking pin 106 is clearly defined.

The skilled artisan will readily recognize that it is not important in the illustrated embodiments that the adjustment plate 100 is secured to the plurality of different heights H having spacer blocks 101 a to 101 d at the upper bearing block 2, while the fixed bearing block 111 on the lower bearing block third is provided, because this selection could be carried out without loss of function and vice versa and also the stacked arrangement of the rollers 4, 5 is not mandatory in any way.

Furthermore, combinations of the two illustrated embodiments are conceivable, for example by providing a disc-shaped adjusting plate rotatable about a central axis on the upper bearing block 2, while a longitudinally displaceable adjusting plate is provided in guide rails 109 on the lower bearing block 3, so that a correspondingly high number of different axial distances AS becomes adjustable.

The main advantage of the illustrated setting devices 1 is their extremely short changeover time with simultaneously highly accurate adjustment of the axial distance AS. If e.g. when using such a setting device 1 in a roller frame with embossing rollers 4, 5 changed in the course of a product change from a three-ply to a four-ply material, so the axial distance AS must be tracked accordingly. For this purpose, it is only necessary as part of the conversion, when moving apart rollers 4, 5, the adjusting plate 100 to move further until the desired spacer block 101a to 101d with the required height dimension H the spacer block 111 is opposite, whereupon when moving together of the rollers 4, 5 then sets the desired exact axial distance AS immediately. Similarly, with progressive wear of the embossing rollers, a corresponding compensation of the axial distance AS of the rollers 4, 5 to each other within a very short time be made.

Claims (9)

1. Roller arrangement with two rollers (4, 5) rotatably mounted at their ends in bearing blocks (2, 3), adjusting devices (1), by means of which the rollers (4, 5) can be adjusted with respect to one another with regard to their axial spacing (AS), being provided on both sides of the rollers (4, 5) between the bearing blocks (2, 3), characterised in that the adjusting devices (1) comprise a plurality of spacer blocks (101a, 101b, 101c, 101d), which have different heights (H) from one another and the bearing blocks (2, 3) can be placed against one another with the interposition of one of the spacer blocks (101 a, 101 b, 101 c, 101 d), the spacer blocks (101a, 101b, 101c, 101d) being arranged on a common adjusting plate (100), which can be adjusted stepwise in such a way that, in each case, one of the spacer blocks (101a, 101b, 101c, 101d) can be selected to rest on the bearing blocks (2, 3) and fixes the axial spacing (AS) between the rollers (4, 5).
2. Roller arrangement according to claim 1, characterised in that the spacer blocks (101 a, 101b, 101 c, 101 d) are fastened with their adjusting plate (100) to a bearing block (2) and the opposing bearing block (3) is equipped with at least one spacer block (111), against which the selected spacer block (101 a, 101b, 101c, 101d) can be placed with the formation of the axial spacing (AS) between the rollers (4, 5).
3. Roller arrangement according to claim 1 or 2, characterised in that the adjusting plate (100) is disc-shaped and can be rotatably adjusted about a central axis (Z).
4. Roller arrangement according to claim 3, characterised in that the adjusting plate (100) is resiliently fastened to the bearing block (2) by means of a fastening screw (102) defining the central axis (Z).
5. Roller arrangement according to claim 1 or 2, characterised in that the adjusting plate (100) is longitudinally adjustably held on the bearing block (2).
6. Roller arrangement according to claim 5, characterised in that the adjusting plate (100) is longitudinally displaceably held in guide rails (109).
7. Roller arrangement according to any one of claims 1 to 6, characterised in that the adjusting plate (100) has a latching device to fix the adjusting steps.
8. Roller arrangement according to any one of claims 1 to 7, characterised in that the spacer blocks (101 a, 101b, 101c, 101d, 111) have the same heights and have shims (104, 114) of different heights placed beneath them.
9. Roller arrangement according to any one of claims 1 to 8, characterised in that the adjusting plate (100) is peripherally equipped with means (107) for the engagement of an adjusting tool.

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