KR100193549B1 - Width adjusting device for reel cutter - Google Patents

Abstract

Apparatus for spreading a plurality of co-traveling web portions of a cut web such that a defined spacing is produced and maintained between the web portions. The apparatus includes a pair of spaced, perforated plates for permitting the application of sub-atmospheric air pressure to both sides of the traveling web portions to remove particulate matter from both surfaces of the web portions. The web spreading and particulate matter removing apparatus are connected to move as a unit while maintaining the spacing of the perforated plates from the web.

Description

[Name of invention]

Width adjuster for reel cutter

Detailed description of the invention

[Background of invention]

[Field of Invention]

The present invention relates to a width adjusting device for a reel cutter having two or more web guide rollers. In particular, the present invention disperses a conveyed fibrous web, such as a cut paper sheet, in the conveying direction of the web so that the cut web portions are distributed to the side of the conveying direction and maintain a predetermined gap distance between the cut web portions. A simple apparatus for collecting and discharging dust particles generated while

[Prior art]

The reel cutter cuts the material web with an axial portion released from the roller and elongated in the longitudinal direction (web advancement) into several partial webs (ie narrowly longitudinally cut web portions) and the several portions. Webs are subsequently rewound. During this process, it is very important to guide the partial webs parallel to each other accurately and to prevent mutual defects on the cut edges of the adjacent partial webs. A width adjusting device with two web guiding rollers is used for this purpose, the first roller being spherical in the region of the part or circumferentially extending surface on both sides on which the material web is wound when observed in the web forward direction. Having a shape (ie contour), the shape is preferably obtained by corresponding bending of the axis of the web guide roller.

The first web guide roller expands the entire web material in the width direction so that adjacent partial webs are expanded in the region of the cut edges so that they are no longer parallel. However, the webs must be guided in parallel to each other in order to provide subsequent accurate pullability of the partial webs.

The partial surface from which the web material of the second web guiding roller, which is located within a certain distance, preferably several hundred millimeters, from the first web guiding roller, is to be opposed to the spherical or convex shape of the first web guiding roller. It is constructed to have a surface contour, that is, a concave shape. Individual partial webs spaced apart from each other by a particular lateral distance are guided back in parallel directions with their isolation maintained. Therefore, the above-described width must be provided so that the adjusting device can be installed only when there is a space between the cutting station and the cutting station of the reel cutting machine.

In addition to the above requirements, reel cutters typically have to remove dust and / or possible residues which are produced during the longitudinal cutting or cutting process and deposited on the material web. Therefore, the known dust removal systems also require space requirements, thus exacerbating the problem of limited space conditions as described above.

With reference to European Patent No. 0 431 275 A2, an apparatus for dispersing a relatively narrow partial web strips produced when a relatively wide web to be conveyed is longitudinally cut into a plurality of strips is described. The plurality of conveyed relatively narrow web strips are first distributed by a first curved rotating roll and then guided into an array that is simultaneously transported in parallel by passing through a second curved rotating roll. The apparatus is provided with an adjustment mechanism which corrects the direction angle between the curved rolls so that the direction angle between the curved rolls can be adjusted to the required value. The device not only collects the dust during the web-cutting process but also fails to provide a device for collecting such dust generated in connection with the curved rolls dispersing the web.

[Summary of invention]

The present invention has been made in view of this fact, and an object thereof is to arrange a double expander roller arrangement in a reel cutting device as well as a dust removal system in a confined space between the cutting station and the winding station. It is also desirable to insert the partial webs in a less complex manner as possible in the device parts arranged behind the cutting station.

This object is achieved by a width adjusting device for a reel cutter which is constructed to continuously pass the web being conveyed to the top of the convexly curved web-dispersion roller and the concavely curved roller to maintain the cut web portions bilaterally. . A dust collector is positioned in the middle of the first and second rollers, the dust collector consisting of a pair of stacked vacuum plates, the vacuum plates being located on both sides of the web.

Flat plates with suction openings used in accordance with the present invention may be implemented by other means similar to the shape and arrangement of the suction openings in accordance with the inventive concept; A sufficiently strong and evenly distributed suction air flow can be implemented with sufficient mechanical stability to allow undesirable impurities deposited on the conveyed web to be removed and discharged through the suction opening. The plates may be provided with slots, holes or a similar structure used for this purpose, or the plates may consist of a crossover or noncrossing sorting structure with sorting spaces.

The present invention provides high efficiency with regard to dust removal with minimal structure size and also simplifies the insertion process of web ends.

The discharge of the suction air flow, including the generation of the suction air flow and the discharge of the removed particles, can be realized by special means such as, for example, flexible or rigid pipes leading out of the suction opening. Particularly preferred is a structure in which a plate having a suction opening forms part of one hollow body that extends over the width of the material web (width of the device). The arrangement is not only complicated from a structural point of view, but can also be structured very effectively with regard to flow technology.

Such arrangements have particularly small space requirements and are of such construction when both hollow bodies form part of the support arrangement for the web guiding rollers of the width adjusting device arranged on both sides of the plate. This makes it particularly effective from a mechanical point of view, since it becomes possible to omit the necessary torsional rods or similar structural elements which are laterally arranged in the material web.

In this particular case, both hollow bodies are provided with plates, the plates being preferably secured to one bracket for each of the two web guiding rollers arranged on both sides of the plates. It is sexually connected such that both hollow bodies and both brackets together form a support arrangement. This makes it possible to install or remove the width adjuster together with the suction device from the reel cutting device as a simple and especially prefabricated and possibly standard structural unit (group of structural parts), or if required It can be subsequently installed in the simplest way. The structure of the support arrangement, designated as a bracket, can be implemented by special means, the most important of which is not in a narrowly bracketed structure but several structural elements provided on the structural elements or their respective front ends. And a structure that can perform the receptacle function of the bearings of the web guiding rollers, which can also be rigidly connected to hollow bodies extending from the upper portion of the device in the width direction.

The arrangement according to the invention is particularly advantageous when the support arrangement of both web support rollers is pivoted about an axis extending parallel to the axis of rotation of the guide rollers.

In this particular case, the dust removing plates are also swiveled without changing the geometry in the web advancement in the gap region formed between the two plates. By pivoting as above horizontally to the web guiding rollers of the width adjusting device, the winding angle of the material web around the web guiding rollers is changed and therefore its efficiency is changed. Such a change is necessary, for example, when changing the number and / or width of the partial webs of the material web.

In particular, the main features of the invention, which ensure good guidance and insertion of partial webs, are described in the claims.

The electrical structural parts used in accordance with the invention and the structural parts described in the claims and described as examples are not subject to certain special exceptions in their size, shape, material selection and technical concept and therefore the same application. Known selection criteria in the art can be used without limitation.

Details, characteristics and advantages according to the object of the present invention will appear from the preferred embodiment described below with reference to the drawings showing a preferred example of the width adjusting device according to the present invention. The figure shows schematically the cross section of the width adjusting device according to the invention, the cutting plane being located parallel to the web forward direction and perpendicular to the web guiding rollers.

The width adjusting device with the dust removal system according to the invention can also be used in a way that is advantageous for material webs which are basically not divided longitudinally or have not yet been divided.

Basically it becomes possible to separate web materials suitable for the purposes of the present invention, in particular paper and cardboard materials, fiber materials or foils composed of metal and plastic or similar materials, or multilayer materials.

[Brief Description of Drawings]

1 is a side view showing in schematic form curved first and second web guide rollers rotatably mounted on both sides of a dust collector;

Detailed Description of the Preferred Embodiments

Referring to the drawings, the path of the material web 11 through the width adjusting device 10 is indicated by broken lines (long and short dotted lines), and the web forward direction is shown by the arrow 12. When viewed from the web forward direction, the material web 11 is first wound at a small angle of 40 ° around the first web guide roller 13 and subsequently around the second web guide roller 14. A linear web portion wound in the opposite direction and having a length of several dm, for example 5 dm, is arranged between the two web guiding rollers. The surface contour of the portion of the web guiding roller 13 on which the material web 11 is to be wound around becomes convex when viewed in the web conveying direction, and the surface of the corresponding portion of the web guiding roller 14. The contour is shaped in a concave manner. In the preferred example shown in the figure, the shape is obtained by correspondingly bending all of the web guiding rollers (see, for example, Federal Republic of Germany AS 22 01 844).

Bearings 15A or 15B for supporting web guiding rollers 13 and 14 are provided on corresponding front ends of the web guiding rollers 13 and 14. The bearings are sequentially connected to the retaining plate 16 and in particular screwed together, with the retaining plate 16 between the bearings corresponding to the bearings 15A and 15B on each side of the device. A shared bracket for web guiding rollers 13 and 14 which is supported in a pivoting manner about pivot point 18 provided on respective retaining plates 16 opposite to the non-machined frame. 17). The pivot axis extending through the opposing pivot points 18 is perpendicular to the direction of transport in the plane of the web and at the center of the web portion between the two web guiding rollers 13 and 14. Cross).

The brackets 17 supported in a pivoting manner with respect to both sides of the material web 11 are connected to each other by two hollow elongated contour bodies 19 and 20 in the region of the retaining plate 16, The contour bodies 19 and 20 are vacuum sources having a dust collector by means of one or more perforations 23 and 24 and one dust removal pipe 25, 26 arranged in the retaining plate 16, Two suction chambers 21 and 22, which can be connected to the cyclone, for example, are welded or attached in a similar manner as their front ends. In order to provide good adaptability to local space requirements, the dust removal pipes 25 and 26 are extended at right angles or some other suitable angle with respect to the contour bodies 19 and 20, so that the retaining plate 16 ) And the pivotal connection between the dedusting pipes 25 and 25 to provide good adaptability to local space requirements (see directional arrows A and B).

On the sides facing the material web 11, the contour bodies 19 and 20 are provided with sides 19A and 20A, which sides 19A and 20A are structured as perforated plates in the illustrated embodiment. And forming flat plates provided with suction openings 27 such that the plates extend over the entire width of the material web and over a particular portion of the material web path in the web forward direction and parallel to the material web 11. To be arranged. The flow arrow C indicates the direction in which the suction air and the dust particles included therein are allowed to flow through the suction openings 27 of the plates (sides 19A and 20A).

The material web 11 and the contour bodies 19 and 20 as the bracket 17 and the contour bodies 19 and 20 form a unitary carrier arrangement for the web guiding rollers 13 and 14. The relative position between the sidewall surfaces 19A and 20A of the is not changed even when the arrangement is pivoted about the pivot point 18.

By providing the pressure chambers 29 and 30 which are integral with the contour bodies 19 and 20 in the form of pipes 31 and 32 and which extend over the width direction of the device, the pipes are provided with sidewall surfaces. The nozzles 28 are provided at both sides of the distance gap D between 19A and 20A, and fluid can be supplied to the material web 11 through the nozzles 28. The fluid not only guides the material web but also removes lightly set dust particles.

In the example shown in the figure, the pipe 32 can be pivoted about its longitudinal axis such that the direction of action of the nozzle can be optimized for this purpose. Guide surface 33 is provided on the contour body 20 to further assist insertion.

The preferred embodiment shown in the figures therefore enables the distance between the surfaces of the dust removal system and the material web to be kept constant irrespective of the pivot position of the web guiding rollers 13 and 14. Both lateral surfaces of the web material are cleaned at the same time. The lateral surfaces 19A and 20A associated with the nozzles 28 simplify the automatic insertion of the material web into the width control. The contour bodies 19 and 20 simultaneously fulfill the function of forming part of the carrier arrangement of the vacuum chamber and web guide rollers 13 and 14 so that other structural elements conventionally used for this purpose can be omitted. Make sure

It will be readily apparent to one skilled in the art that the suction device according to the present invention can basically be combined with other cylinders or rollers of the reel cutting device without departing from the principles of the present invention.

Claims (9)

Two or more web guiding rollers 13, 14, adjusting relative lateral positions of the plurality of simultaneously transported cut webs 11 and removing particulate matter from the cut webs 11. In the apparatus used for the purpose, the apparatus comprises a pair of opposed parallel plates 19A, 20A, each of which is provided with a plurality of through openings 27, the plates of which the webs are conveyed. Openings are arranged in proximity to a portion of the web transport path on both sides of the web to receive particulate material through the openings from the surfaces and disposed between the two web guiding rollers 13, 14. Become; The web guiding rollers (13,14) are arranged back and forth to adjust and maintain lateral positions of the cut webs relative to each other; The apparatus comprises two hollow contours 19, 20, each contour being arranged in an opposing array about a corresponding plate on one side of the web to be conveyed, the contours being Maintain sub-atmospheric pressure therein and press particulate material from the webs through the plate openings into the contours; The two contours are configured to be structurally coupled within a carrier arrangement into which two or more web guide rollers 13, 14 are mounted, thereby controlling the position of the plurality of transported webs and the particles from the web surface. Device for removing material. The method according to claim 1, wherein the two hollow contours (19, 20) are rigidly connected at their corresponding one end; The bracket 17 is mounted at each end of the two hollow contours for rotationally mounting the two web guiding rollers 13, 14 on both sides of the plates, such two hollow contours. And allow the two brackets to form a carrier arrangement. 3. The carrier arrangement according to claim 2, wherein the carrier arrangement comprises an axis of rotation 18, the axis of rotation 18 extending laterally of the device in the plane of the webs being conveyed simultaneously, the carrier axis being arranged upstream and downstream of the plates. Apparatus characterized in that it is arranged parallel to the axes of rotation of the web guide rollers (13,14). 4. Device according to claim 3, characterized in that an angular dust removal pipe (25, 26) is disposed at one or more ends of the respective hollow contours. 5. Device according to claim 4, characterized in that the one or more dust removal pipes (25, 26) are pivotally mounted about an axis extending parallel to the longitudinal portion of the hollow contour. 2. Apparatus according to claim 1, characterized in that one or more nozzle means (28,29) are disposed in each contour for supplying pressure fluid to the conveyed web. Device according to claim 6, characterized in that the nozzle means (28, 29) are arranged in respective hollow contours for spraying pressure fluid on respective opposed surfaces of the plurality of webs being conveyed. . 2. The carrier arrangement according to claim 1, wherein the carrier arrangement has at least one plate (19A, 20A) on each contour (19, 20) and at least two guide rollers (13, 14) between the guide rollers. Wherein the device is constructed and arranged to be able to rotate about its axis of rotation (18) while maintaining its position with respect to the full length of the cut webs. An angled dust removal pipe (25, 26) is disposed inside one or more of the respective hollow contours for coupling the contours (19, 20) to a sub-atmospheric air pressure source. Become; At least one nozzle means (28,29) is arranged in each contour for supplying compressed fluid to the conveyed web.