JP7128292B2 - web guiding device - Google Patents

Description

The present invention provides at least one pivotally arranged web guide during processing or processing of web-like materials, preferably during processing or processing of paper webs, cardboard webs, plastic webs, composite webs or textile webs. It relates to a web guiding device for changing, in particular adjusting and/or controlling, the lateral position of a web-like/endless sheet-like material by means of rollers, the web-guiding rollers adjusting the web-like material as it is conveyed. The lateral position of the web-like material, at least partially wrapped with material, is changed by pivoting the web guide roller about a correction axis and/or a reference axis.

Accurate lateral positioning of web-like materials/webs of material is extremely important in many processing and processing steps such as printing/stamping, longitudinal cutting, stamping or die cutting. Increased production speeds and increased quality requirements require precise guidance of material webs/material sheets throughout the production process. Deviations and variations in the lateral position of the material web from the desired lateral position are caused, for example, by different web thicknesses, colorant effects and/or humidity effects or other influences such as previous processing steps at the web edges. may be caused by uneven elongation of the

The web-like material is typically provided on large supply rolls and is unwound from these rolls into processing machines. The correction and/or control and/or adjustment of the lateral position of the material web, i.e. the creation of a lateral offset transverse to the direction of web extension, is carried out using pivotally arranged web guide rollers. , the web guide rollers are arranged between the supply rolls and the processor. The web guide rollers can be detected at each end by one actuator, which are driven back and forth synchronously. In this way, the roller pivots about its center, thereby preventing unilateral web length changes and/or actively adjusting/setting the lateral position of the web-like material. can be done. The lateral offset is determined by the so-called correction angle between the pivoting web guide roller and another roller upstream or downstream in the conveying direction of the material web. A corresponding roller can also be pivoted by only a single actuator. In this case, the adjustment stroke can be transmitted in opposite directions to the respective roller end via the lever and the connecting rod. Corresponding pivot rollers are known from DE 25 40 923 A1 and EP 1 474 226 A1.

Furthermore, it is known to provide a web guiding device with two web guiding rollers spaced parallel to each other. The two web guide rollers can pivot independently of each other or synchronously. The two web guide rollers can also be arranged on a common frame pivotable about the axis of rotation. The axis of rotation of the frame can, for example, pass through the center of the frame or through the axis of rotation of the two web guide rollers. The lateral offset of the material web is a function of the distance between the two pivoting web guide rollers and the angle of rotation of the pivoting frame.

DE 25 40 923 A1 European Patent Application Publication No. 1474226 (A1) DE 38 33 804 A1

SUMMARY OF THE INVENTION It is an object of the present invention to improve the web guiding devices known from the prior art. In particular, the web guiding device shall be characterized by a compact design and a high functional density. Furthermore, reliable and precise control and/or adjustment of the lateral position of the web-like material should be ensured.

The above object is achieved by a web guiding device with the features of claim 1 . Advantageous configurations of the invention are subject matter of the dependent claims.

According to the invention, in a web guiding device of the type described above, at least one break/smoothing/break is provided in the travel between the pivotable web guiding roller and another roller which preferably follows in the conveying direction of the material. A tool is provided. The material is at least partially wrapped around the web guide roller and another roller whereby the material web is tensioned over the rollers. A breaking tool (German: Brechwerkzeug, English: breaking tool, straightening tool) can sink into the surface of the material web. The material is forced in one direction by the break tool and exhibits a break angle and/or wrap angle with the break surface and/or alignment surface of the break tool. In particular, the break tool enables the web-like material to be provided in a stress-free, perfectly planar and/or flat configuration, which can be of great importance for further processing of the web-like material. Especially when unwinding a web-like material from a storage roll, this type of storage can create and/or provide curvatures and/or stresses in the material web, so that the material web remains stress-free and flat. position cannot be guaranteed. In principle, however, it may be necessary to treat a flat material web so that it subsequently assumes a curved orientation, ie a curved and/or curvilinear shape.

In either case, the predetermined stress is broken/smoothed/decaled and/or by passing the web-like material with curved flat sides through the breaking surface and/or the alignment surface of the breaking tool. generated. The material exhibits a break angle in the area of contact with the alignment surface, the break angle being determined by the position of the two rolls adjacent to the alignment surface. In particular, a smoothing action occurs, ie the web-like material is then available in a flat, planar form. Alternatively, however, it is also possible in this way to provide stress and thus bending in the material web. Various curvatures and/or stresses can be removed from or imparted to the web-like material depending on the break angle and alignment plane of the break tool.

The invention is therefore based on the idea that the web guiding device can also be used for breaking web-like materials, ie it incorporates a further novel functionality into the web guiding device. Here, the stress tool is incorporated into the web guiding device so as to be able to change the lateral position of the web-like material as well as to be able to break the web-like material.

With respect to the present invention, it has surprisingly been shown that breaking the material web, in particular for strain relief, has a beneficial effect on the change in lateral position of the material web caused by the web guide rollers. Breaking of the material web in the area between the two web guide rollers results in the material web being guided between the web guide rollers in a flat, planar configuration, which allows very precise lateral positioning of the web-like material. be possible. In the case of the web guiding device according to the invention, the stresses in the material web as a result of lateral offsets of the material web can also be reduced in the area between the web guiding rollers, resulting in precise web guiding and/or web guiding. Control is simplified.

Also, by integrating two functional units into the web guide device, the installation space required for the functions "web guide control" and/or "web guide adjustment" and "break" can be significantly reduced. Due to the compact design of the web guiding device according to the invention, low machine and/or equipment costs can be realized. Due to the small installation space, it is possible to easily change the installation position of the web guiding device, making the web guiding device according to the invention suitable for a wide range of applications. Incorporating a "break" function into the web guider represents a departure from the conventional conventional break tool placement at the front of the web guider.

The lateral offset produced by the web guiding apparatus according to the invention is a function of the correction angle or pivot angle through which the pivoting web guide roller is pivoted. A breaking tool is incorporated into the web guiding apparatus and positioned adjacent to the web guiding rollers so that the web-like material is broken in addition to changing the lateral position of the web-like material. The web-like material is broken after undergoing a (first) directional correction and/or redirection as it passes the pivoting web guide rollers. After passing through the breaking tool, the material web is preferably stress-free and flat and can be fed into further processing and/or processing steps. In this context, "stress-free" means that when the external force is released, preferably the material web no longer contains stresses leading to bending, distortion or wrapping of the material web. When all external forces are released, in particular tension acting on the material web during web transport is released, the material web preferably assumes a planar configuration and preferably no longer contains stress.

To change the lateral position of the web-like material, the web guide rollers can be manually or automatically pivoted by a correction or pivot angle. The web guide rollers can each be detected at one axial end by one adjusting device, for example a motor or adjusting cylinder, which are moved synchronously with each other. In this way, the web guide rollers can be pivoted about their center, thereby making it possible to adjust the lateral position of the web-like material. However, the web guide rollers can also be pivoted by a single adjustment device and/or only one actuator. In this case, rotation can be transmitted in opposite directions to the respective roller ends via levers and/or connecting rods. Alternatively, the web guide roller can be pivoted about an axis of rotation that does not pass through the center of the web guide roller. Instead of pivoting the web guide rollers with at least one adjustment device, the web guide rollers can also be manually adjusted by the user.

A sensor device with at least one sensor for detecting the lateral position of the web-like material and a correction angle and/or pivot angle of the web guide roller as a function of the lateral position of the web-like material detected by the sensor It is useful if a control device and/or a regulating device designed to control and/or regulate the is provided. A sensor device detects the lateral position of the web-like material and transmits this information to the control device and/or the regulating device. A control device and/or an adjustment device compares sensor data representing current data with stored target data and derives control commands for the pivoting web guide rollers from the comparison of the two values. A corresponding command is then sent by the control device and/or the adjusting device to the pivoting web guide roller and/or the adjusting device of the web guide roller. A corresponding correction angle for the web guide roller is then set. This provides automatic control and/or adjustment and adjustment of the lateral position of the web-like material. For example, the sensor can be a web edge sensor in the form of an ultrasonic sensor or an optical sensor. A line scan camera can be used to detect the lateral position of the web-like material.

To change the lateral position of the web-like material, the web guide roller is pivoted about a correction or pivot axis perpendicular to the axis of rotation of the web guide roller. The greater the desired lateral offset of the material web and/or the greater the deviation between the current position and the target position of the material web, the greater the correction angle of the web guide roller is set.

The pivoting web guide roller can be designed as a heating roller and/or as a cooling roller. This further increases the functional density of the web guiding device according to the invention. Heating rollers and/or cooling rollers are used in a variety of applications. For example, a heated roller can activate the reaction layer. Cooling rollers can be used, for example, to cool the material web.

In a preferred embodiment of the invention the breaking tool is also arranged to be movable, preferably pivotable. Preferably, the web guide roller and the breaking tool are rotatable about parallel pivot axes. The pivoting arrangement of the breaking tool makes it possible in particular to align the breaking tool parallel to the web guide rollers. The breaking tool can thus be adapted to the lateral offset of the material web caused by the pivoting web guide rollers. The break tool can be pivoted automatically or manually.

In another advantageous design, the web guide roller and breaking tool are synchronously pivotable. This ensures in particular that the web guide rollers and breaking tools are always parallel to each other. This ensures effective tension reduction of the material web after it has passed the web guide rollers and avoids collisions between the web guide rollers and the breaking tool during pivoting of the web guide rollers.

For synchronous adjustment, a mechanical coupling of the web guide roller and the breaking tool can be provided, which allows a specific correction angle and/or pivoting angle of the web guide roller and/or a specific pivoting of the breaking tool. Simplified control and/or adjustment in setting the angle.

According to the invention, the breaking tool can be provided between two pivotable web guide rollers arranged successively in the conveying direction of the material. If the web guide rollers are pivoted relative to the preferably non-pivoting guide rollers upstream and downstream of the web guider, the pivot angle or correction angle of the material web as it passes through the web guider. It is possible to achieve a certain lateral offset of the material web as a function, the conveying direction before the first web guide roller and the conveying direction after the second web guide roller can run parallel to each other, the lateral Offset is also determined by the distance between web guide rollers. The distance between adjacent web guide rollers can be, for example, 50-1,000 mm, preferably 200-800 mm, more preferably 300-400 mm. The distance between adjacent web guide rollers can be even greater, especially for large web widths. In the regions between changes in direction of the material web, according to the invention the material is broken with a breaking tool.

A common actuator can be provided for the pivoting of the two web guide rollers. This actuator can also be used to pivot the break tool. This facilitates in particular a synchronous adjustment movement of the web guide roller and the breaking tool. However, the web guide rollers and breaking tools can also be adjusted by multiple separate actuators. This adjustment can be done electrically, hydraulically and/or pneumatically. Measuring, controlling and/or adjusting devices can be provided for the integrated adjustment of the web guide rollers and breaking tools.

The web guide roller and breaking tool, and preferably another web guide roller, can be arranged on the pivotable frame and can thus be pivoted together. A specific lateral offset of the material web can be achieved by rotating the frame. In addition, the common placement of the web guide rollers and breaking tools on the frame includes structurally simple and low cost synchronous adjustment of the web guide rollers and breaking tools. Preferably, the at least two web guide rollers can be arranged on the pivot frame and the breaking tool can be arranged in the transport area between the web guide rollers, so that the web guide rollers and the breaking tools are synchronously pivoted. For movement it is sufficient to rotate the frame by a certain correction angle and/or pivot angle. The use of a pivot frame greatly simplifies the synchronization of the web guide rollers and the breaking tools, requiring only one single adjustment device to pivot the web guide rollers and breaking tools via the pivot frame. and/or because only one actuator is required. An alternative design can comprise a pivoting frame on which the web guide roller and preferably another web guide roller are arranged, the frame being movable with respect to the stationary arranged breaking tool. The breaking tool can be fixed, for example, to a stationary frame wall. For all designs, ensure in all cases that the web-like material can be guided past the breaking tool such that the desired breaking action can occur as a result of the web-like material coming into contact with the breaking tool. It is understood that the

The frame may comprise a stationary lower frame and a pivoting upper frame, and the pivoting upper frame may pivot relative to the stationary lower frame about an axis of rotation. The axis of rotation of the frame can be provided in the infeed area of the material web in front of the web guide rollers. Such an arrangement makes it possible to change the lateral position of the material web in the case of low stresses in the material web, while at the same time allowing very short control sections. As a result, this arrangement is particularly suitable for sensitive materials. However, the axis of rotation also intersects the conveying plane of the material web in the central region between the two web guide rollers and can preferably extend through the longitudinal axis of the breaking tool.

Preferably, the guide rollers for the material web are provided in the conveying direction in front and/or behind the pivotable frame, and more preferably can be arranged non-pivotably. Guide rollers should not be mounted on the frame. The pivotable frame with the web guide rollers and the breaking tools is therefore preferably arranged between the fixed deflecting rollers, which allows a precise material feed to the web guide device according to the invention and the creation of a lateral offset. Afterwards as well as material ejection after the material breaks is ensured.

For breaking the material, a plurality of breaking tools can be arranged one behind the other in the conveying direction of the material web. Multiple break tools can be used to gradually reduce or create stress in the web-like material. For example, this can be provided to achieve very precise and perfect smoothing of the material web. Conversely, the use of multiple breaking tools can also produce higher stress and/or higher curvature in the web-like material. In this case, each breaking tool is preferably in travel between two adjacent rollers. Each breaking tool and the rollers assigned to each breaking tool preferably face different flat sides of the material web. During breaking, the material web is tensioned by rollers assigned to the breaking tool.

In particular, a web-like material can be broken by using multiple breaking tools on both flat sides, the breaking tools facing different flat sides of the material web.

The breaking tool can be designed to be adjustable in order to change the breaking angle between the web-like material and the alignment surface of the breaking tool. By adjusting the break tool, the position of the alignment surface relative to the web of material can be changed and/or adjusted/set. By varying the break angle, stress reduction in the breaking of the material web, or even stress build-up within the material web, if desired, can be obtained.

By varying the break angle, for example, different degrees of smoothness of the web-like material can be achieved. In this way all kinds of curvatures and/or stresses can be applied to the web material. The smaller the break angle between the alignment surface and the web-like material, the greater the stress and/or smoothness that can be achieved from the web-like material. The higher the break angle, the lower the smoothness. Starting from a break angle of about 180°, there is no deflection of the web-like material at the alignment plane of the breaking tool and the breaking action is close to zero.

Preferably, the distance between the alignment plane of the breaking tool and the plane defined by the two web guide rollers is adjusted/set and/or by moving and/or offsetting the breaking tool with respect to the defined plane. or can be changed. This includes a precise alignment surface for the web-like material. This adjustment can be done manually and/or automatically using an adjustment device.

On the other hand, the distance between the breaking tool and the two web guide rollers in the plane defined by the web guide rollers is such that the breaking tool is equidistant to both web guide rollers in the conveying direction of the material web and vice versa. can be non-adjustable so that

It is not excluded that the adjustment of the break tool for changing the break angle is performed by means of control and/or adjustment devices. A sensor device with at least one sensor can be provided, the curvature and/or the stress of the material web being detected and/or measured with the aid of the sensor, the adjustment of the breaking tool relative to the web guide rollers being measured data automatically as a function of

Thus, two adjacent web guide rollers, in particular with respect to the plane defined by their longitudinal axis, the breaking tool can preferably only be displaced and/or offset perpendicular to this plane. Thus, for example, if the web guiding device is arranged horizontally, the breaking tool can only be adjusted in height, for example, in the vertical direction. Therefore, the break angle between the alignment surface and the web-like material can be easily adjusted/set and/or changed by a single setting parameter, which simplifies the adjustment.

In an advantageous design, break bars, break rolls or break rollers are provided as breaking tools. A suitable break bar is known, for example, from DE 38 33 804 A1. When using a breaking roller as the breaking tool, the diameter of the breaking roller can be less than 70%, preferably less than 50%, more preferably less than 30% of the web guide roller diameter. Advantageously, the breaking tool can comprise one or two breaking rollers supported and mounted by ball bearings. One or more support rolls may also be provided for one or more break rollers. In addition, a suction device can be provided on the breaking device, with which particles such as dust, paper, etc. can be sucked off continuously and/or intermittently, especially in the region of the guide surface. The suction device prevents contamination of the web-like material and damage from particles that may accumulate on the guide surface.

Even if not explicitly mentioned in detail, the embodiments of the invention described above can be combined with each other as desired. The present disclosure is not limited to the combination of inventive features specified by the selected paragraph formatting.

Further features of the invention result from the following description of two preferred embodiments of the invention based on the drawings, as well as from the drawings themselves. All of the features described and/or depicted, singly or in any combination, form the subject of the present invention, regardless of their combination or relative relationship in the claims.

The invention is explained in detail below with the aid of the drawings.

1 is a schematic view of a web guiding device according to the invention with two web guiding rollers and a breaking tool arranged between them; FIG. 1 is a schematic view of a web guiding device according to the invention with two breaking devices, each arranged between two adjacent web guiding rollers; FIG.

FIG. 1 shows two web guide rollers 3 and one breaking device 4 during the processing or processing of a web-like material, preferably during the processing or processing of a paper web, cardboard web, plastic web, composite web or textile web. shows schematically a web guiding device 1 for changing the lateral position of a web-like material 2, using . The distance A between the two web guide rollers 3 can be 50-1,000 mm, preferably 100-800 mm, more preferably 300-400 mm with respect to their central longitudinal or rotational axis. The distance between adjacent web guide rollers can also be greater. In the design shown, for example, the wrap angle of the material web 2 with the web guide roller 3 is each at least 90°.

The web-like material 2 is provided, for example, by a supply roll (not shown). The web-like material 2 is fed into the web guiding device 1 via at least one guide roller 6 .

Two web guide rollers 3 and a breaking device 4 are arranged on a pivotable upper frame 5 . A pivotable upper frame 5 is connected to a fixed lower frame 7 so as to be pivotable about an axis of rotation 8 . In the design shown, the axis of rotation 8 passes through the infeed area of the web-like material 2 into the web guiding device 1, i.e. the web-like material 2 in the area of the first web guiding roller 3 shown on the right side of FIG. extends in the conveying direction 9 of the . However, the design of the web guiding device 1 in which the axis of rotation 8 passes through the center of the upper frame 5 between the web guiding rollers 3, which preferably coincides with the center of gravity of the upper frame 5, is not excluded. However, the position of the axis of rotation 8 can also take any other position inside and outside the upper frame 5 .

A sensor device 11 with at least one sensor is arranged between the web guiding device 1 and another guiding roller 10 arranged outside the upper frame 5 . A sensor determines the current position of the lateral position of the web-like material 2 . If the current position deviates from the target position of the web-like material 2 required for the transport process or processing of the web-like material 2, or if the corresponding target position is to be set, a corresponding adjustment command is transmitted by a not shown adjustment and control device to an adjustment device of the pivotable upper frame 5 which is likewise not shown. The adjustment device causes a pivotal movement and/or rotation of the pivotable upper frame 5 about the fixed lower frame 7 to adjust the web guide rollers 3 with respect to the deflecting rollers 6, 10, thereby adjusting the web-like material. A specific lateral offset of 2 will be generated.

The breaking device 4 comprises a breaking tool 12 in the form of a breaking bar. As the material is conveyed, the web-like material 2 wraps around the web guide roller 3 over which the material web is tensioned. The alignment surface 13 of the break tool 12 sinks into the plane of the material web. The material is pushed out of its plane by the break tool 12 and exhibits a break angle and/or wrap angle 14 with the break surface and/or alignment surface 13 of the break tool 12 . When the web-like material 2 is pulled over the breaking surface 13, the material is broken, which leads to smoothing of the material web, for example. In principle, however, it is also possible to establish a specific stress in the material web by pulling the web-like material 2 over the break surface 13 and thus to achieve a specific curvature of the material web.

Due to the collective arrangement of the breaking tool 12 and the web guide rollers 3 on the pivotable upper frame 5 a constant parallel alignment of the alignment surface 13 to the web guide rollers 3 is ensured. In this way the alignment surface 13 can be optimally adapted to the conveying direction 9 of the web-like material 2 . In addition, the integration of the "web guide" and "break" functions in one unit offers the potential for space savings and structural simplicity and low cost.

Break angle 14 can be varied by the vertical height adjustability of break tool 12 (characterized by arrow 15 in FIG. 1), as shown in FIG. For height adjustment, the breaking tool 12 moves perpendicular to the plane defined by the axes of rotation of the two web guide rollers 3 .

By varying the break angle 14, it is possible to specifically affect a particular smoothing of the web-like material 2 as it is drawn across the alignment surface 13, or to provide a particular stress and/or curvature as desired. It is possible. For example, the greater the break angle 14 , the less smoothing of the web-like material 2 achieved by drawing across the alignment surface 13 . For example, if the break angle 14 shown in FIG. 1 is approximately 180°, no further smoothing and/or breaking occurs. As a result, the material web 2 is no longer in stressed contact with the alignment surface 13 of the break tool 12 . Similarly, a small break angle 14 results in a high degree of smoothing and/or curving.

The position of the breaking tool 12 can be changed and/or adjusted manually or automatically. Electrically, hydraulically or pneumatically operated adjustment devices can be provided for automatic height adjustment. The position of the breaking tool 12 can also be adjusted as a function of the stress within the web-like material 2, preferably automatically. Corresponding measuring, controlling and/or regulating devices can be provided for this purpose (not shown in FIG. 1).

Furthermore, a design in which the breaking tool 12 is adjusted along the arrow 16 in the plane defined by the axes of rotation of the two web guide rollers 3 is not excluded. By adjusting the breaking tool 12 in the conveying direction 9 of the material web or in the opposite direction, the breaking angle 14 can also be changed.

FIG. 2 schematically shows a different configuration of the web guiding device 1. In FIG. Identical reference symbols in the designs shown in FIGS. 1 and 2 characterize identical structural and/or functional components or assemblies.

In order to change the lateral position of the web-like material 2, the web guiding device 1 shown in FIG. 2 comprises four web guiding rollers 17,18. Two breaking devices 19, 20 are provided for multiple breaking of the material web. Each breaking device 19 , 20 comprises a breaking tool 22 . The type and design of breaking devices 19, 20 may correspond to the type and design of breaking device 4 shown in FIG. 1 and described above.

Web guide rollers 17 , 18 and breaking devices 19 , 20 are arranged on the upper frame 5 . The upper frame 5 is connected to the stationary lower frame 7 so as to be pivotable about an axis of rotation 8 . A specific lateral offset of the web-like material 2 can be achieved by pivoting the upper frame 5 . In the design shown in FIG. 2 , the axis of rotation 8 can be located in the area of material entry into the web guiding device 1 , ie in the conveying direction 21 of the web-like material 2 in front of the first web guiding roller 17 .

A first front breaking device 19 is arranged between the front web guide rollers 17 in the conveying direction 21 . A second breaking device 20 is arranged between two web guide rollers 18 arranged downstream. Thus, each breaking tool 22 is assigned to a pair of web guide rollers 17 , 18 , each breaking tool 22 and the web guide rollers 17 , 18 assigned to this breaking tool 22 being different web-like material 2 . Facing the flat side. As the material is conveyed, the web-like material 2 wraps around the respective pair of rollers, thereby applying tension to the material web across the web guide rollers 17,18. The alignment surface of each breaking tool 22 sinks in the plane of the material web between web guide rollers 17,18.

Two breaking tools 22 each act on opposite flat sides of the web-like material 2 . In this way smoothing can be achieved from both sides. Alternatively, it is also possible to stress and thus bend the web-like material 2 from both sides.

To change the break angle 14, the break tool 22 can be adjusted perpendicular to the plane laid by the adjacent web guide rollers 17, 18, ie left and/or right in FIG. For this purpose, the breaking devices 19, 20 can be adjusted manually or automatically.

For changing, in particular controlling and/or adjusting, the lateral position of the web-like material 2, control and/or adjusting devices (not shown) are provided. If the sensor 11 of the control device and/or the regulating device detects a deviation of the current lateral position of the web-like material 2 from the target position when the web-like material 2 exits the web guiding device 1, corresponding control commands and/or Or an adjustment command is generated and sent to an adjustment device (not shown). The adjustment device pivots the upper frame so that the lateral position of the web-like material 2 is changed to the desired degree.

In principle, the web guiding device 1 could also comprise three or more breaking devices 19, 20 each having an assigned pair of rollers.

1 web guiding device 2 material 3 web guiding roller 4 breaking device 5 upper frame 6 guide roller 7 lower frame 8 rotating shaft 9 conveying direction 10 guiding roller 11 sensor device 12 breaking tool 13 alignment surface 14 breaking angle 15 arrow 16 arrow 17 web guiding roller 18 web guide roller 19 breaking device 20 breaking device 21 conveying direction 22 breaking tool

Claims (9)

At least one pivotally arranged web guide roller (3 , 17, 18) for changing the lateral position of said web-like material (2), comprising:
Said web guide rollers (3, 17, 18) are at least partially wrapped by said web-like material (2) as said web-like material (2) is conveyed, and are adapted to guide said lateral movement of said web-like material (2). In a web guiding device (1), wherein the directional position is changed by pivoting said web guiding rollers (3, 17, 18),
At least one breaking tool (12, 22) is positioned between said pivotable web guide roller (3, 17, 18) and another web guide roller (3, 17, 18) to said web-like material (2 ), said breaking tool (12, 22) being able to sink into the surface of said web-like material (2),
on a pivotable frame (5) about a vertical axis of rotation (8) of said frame (5) said web guide rollers (3,17,18) and said breaking tools (12, 22) as well as said further web guide rollers (3, 17, 18) are arranged so as not to pivot with respect to said frame (5) ;
said breaking tool (12) is adjustable perpendicular to the plane defined by the axis of rotation of said web guide roller (3, 17, 18) and said further web guide roller (3, 17, 18); and/ or said breaking tool (12) is aligned in the direction of transport of said web-like material in the plane defined by the axis of rotation of said web guide roller (3, 17, 18) and said further web guide roller (3, 17, 18). or the opposite direction thereof. Web guide device (1 ). 3. The method according to any one of claims 1 to 2, characterized in that said web guide roller (3, 17, 18) and said breaking tool (12, 22) are synchronously pivotable. web guiding device (1). Said breaking tools (12, 22) are said web guide rollers (3, 17, 18) and said another web guide roller arranged continuously in the conveying direction (9, 21) of said web-like material (2) . A web guiding device (1) according to any one of the preceding claims, characterized in that it is provided between (3, 17, 18). A plurality of breaking tools (12, 22) are provided, said web guide roller (17, 18) and said further web guide roller (17, 18) being assigned to each breaking tool (12, 22), said breaking tool A web guiding device (1) according to any one of the preceding claims, characterized in that (12, 22) are arranged on both sides of the web-like material (2). Said break tools (12, 22) are adapted to said web guide rollers for varying the break angle (14) between said web-like material (2) and alignment surfaces (13) of said break tools (12, 22). A web guiding device (1) according to any one of the preceding claims, characterized in that it is adjustable with respect to (3, 17, 18). the distance between the alignment plane (13) of said breaking tools (12, 22) and the plane defined by said plurality of web guide rollers (3, 17, 18) displaces said breaking tools (12, 22) and/or A web guiding device (1) according to any one of the preceding claims, characterized in that it is adjustable by offsetting or offsetting. the distance between said breaking tool (12, 22) and said two web guide rollers (3, 17, 18) is not adjustable in the plane defined by said plurality of web guide rollers (3, 17, 18) A web guiding device (1) according to any one of claims 1 to 7, characterized in that . Web guiding device (1 ).

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