EP3735489A1

EP3735489A1 - Web guiding device

Info

Publication number: EP3735489A1
Application number: EP18836270.1A
Authority: EP
Inventors: Sven KIPKE; Dirk Puttkammer
Original assignee: BW Papersystems Hamburg GmbH
Current assignee: BW Papersystems Hamburg GmbH
Priority date: 2018-01-05
Filing date: 2018-12-28
Publication date: 2020-11-11
Also published as: JP2021510137A; CN111801465A; CN111801465B; JP7128292B2; DE102018104553A1; WO2019134890A1

Abstract

A web guiding device (1) is shown and described for changing the lateral position of a material web (2) during the treating or processing of material webs (2), preferably during the treating or processing of a paper web, paperboard web, plastic web, composite material web or fabric web, having at least one pivotably arranged web guiding roller (3, 17, 18), wherein the material web (2) at least partially wraps around the web guiding roller (3, 17, 18) as the material is transported, and wherein the lateral position of the material web (2) is changed by the pivoting of the web guiding roller (3, 17, 18). According to the invention, at least one breaker tool (12, 22) is provided in the run of the web-shaped material (2) between the pivotable web guiding roller (3, 17, 18) and another web guiding roller (3, 17, 18).

Description

web guide

The invention relates to a web guiding device for changing, in particular for controlling and / or controlling, the lateral position of a web-like material in the processing or processing of web-like materials, preferably in the processing or processing of a paper, cardboard, plastic, composite material - Or fabric web, with at least one pivotally arranged web guide roll, wherein the web guide during material transport is at least partially looped by the material gene bahnförmi conditions and wherein the lateral position of the web material is changed by pivoting the web guide roll about a correction or pivot axis.

The exact lateral positioning of a web-shaped material is in a lot of processing and processing steps of great importance, such as in printing, slitting, embossing or punching. Growing production speeds and increasing quality requirements require precise guidance of the material webs through the production process. Deviations from a desired lateral position of the material web and disturbances in the lateral position can arise, for example, as a result of uneven elongations of the web edges, caused by different web thicknesses, dyeing or moisturizing effects or other influences, such as preceding processing steps.

The sheet-like material is usually provided on large supply rolls, unrolled from these and fed to a processing machine. The correction or control and / or regulation of the lateral position of the material web, ie the generation of a lateral offset in the direction transverse to the web running direction, it follows by means of pivotally arranged web guide rollers, which are arranged between the Vorratsrol le and a processing device. The web guide roller can be detected at both ends by a respective actuator, wherein the actuators are controlled synchronously mutually. In this way, the roller is pivoted about its center, whereby one-sided web length change can be avoided and / or the lateral position of the web-shaped Materi can be set as active. The lateral offset is determined by the so-called correction angle between the pivotable web guide roll and an upstream or downstream in the transport direction of the web further roll. A corresponding roller can also only be provided by a single roller. gen actuator can be pivoted. In this case, the adjusting stroke can be transmitted in the opposite direction to the respective roll ends via levers and push rods. Corresponding pivotable rollers are known, for example, from DE 25 40 923 A1 and EP 1 474 226 A1.

In addition, it is known to equip Bahnleitvorrichtungen with two spaced apart web guide rollers. The two web guide rollers can each be pivoted independently or synchronously. The web guiding rollers can also be arranged on a common frame, which is arranged pivotably about an axis of rotation. The axis of rotation of the frame can run, for example, through the center of the frame or through an axis of rotation of the two web guide rollers. The lateral offset of the Ma terialbahn is dependent on the distance of the two pivotable web guide rollers and the angle of rotation of the pivotal frame.

Object of the present invention is to develop the known from the prior art th Bahnleitvorrichtungen. In particular, the Bahnleitvor direction should be distinguished by a compact design and a high func onsdichte related. Furthermore, a reliable and accurate control and / or regulation of the lateral position of the web-shaped material should be ensured.

The aforementioned object is achieved by a web guiding device with the features of claim 1. Advantageous embodiments of the invention are the subject matter of the subclaims.

According to the invention, in the case of a web guiding device of the type mentioned at the outset, at least one breaking tool is provided in the area between the pivotable web guide roll and a further roll which preferably follows in the direction of transport of the material. The material wraps around the web guide roller and the further roller at least partially, whereby the material web is clamped over the rollers. The breaking tool can dip into the plane of the material web. In this case, the material is pressed by the crushing tool in a ge direction and takes a breaking or straightening surface of the crushing tool a breaking or wrapping angle. The breaking tool makes it possible in particular special to provide the web-like material stress-free and in a completely planar or planar shape, which can be of great importance for the further processing of bahnförmi gene material. A tension-free and planar Position of the material web can not be given in particular in the settlement of the web-shaped material of supply rolls, since curvatures and / or stresses form in the web or can be introduced into the se by this type of Before. In principle, however, it may also be necessary to machine a flat material web so that it subsequently assumes a curvature position, ie a curved or curved shape.

In both cases, a predetermined stress is thereby broken or it is proved that the web-shaped material with the flat side to which it is to be curved is moved past a breaking or straightening surface of the breaking tool. In the area of contact with the straightening surface, the material assumes a breaking angle, which is determined by the position of two rolls adjacent to the straightening surface. This results in particular a smoothing effect, i. the sheet material is then in a flat, planar form. Alternatively, however, stresses and thus curvatures can be introduced into the material web in this way. Depending on the refractive angle and depending on the directional surface of the breaking tool different curvatures and / or stresses can be removed from the web material or alternatively introduced into the web material. The invention is therefore based on the idea to use the web guiding device also for breaking the web-like material and thus to integrate a further, new functionality in the web guiding device. Here, the crusher tool is integrated into the web guiding device such that both the lateral position of the web-shaped material can be changed and a refraction of the web-shaped material can take place.

In connection with the invention, it has surprisingly been found that in particular the breaking of the material web for stress relief has an advantageous effect on the change in the lateral position of the material web forced by the web guide rolls. The breaking of the material web in the region between the two web guide rollers causes the material web can be guided flat and in planar form between the web guide rollers, which allows a very accurate la terale positioning of a web-like material. Tensions in the Ma terialbahn, which arise as a result of generating a lateral offset of the web, can be degraded in the area between the web guide rollers in the area between the web guide rollers again, which simplifies the web-based control or regulation. The integration of two functional units in the web guiding device also makes it possible to significantly reduce the required installation space for the functions "web guiding control" and "breaking". Due to the compact design of the web guiding device according to the invention, low machine or device costs can be realized. Due to the small space a change in the location of the web guiding device is easily possible, whereby the fiction, contemporary web guiding device is widely used. In this case, the integration of the function "breaking" into the web guiding device represents a departure from the conventionally provided in the prior art arrangement of the breaking tool in front of the web guiding device.

The lateral offset, which is generated by the web guiding device according to the invention, is dependent on the correction or swivel angle by which the swivel bare Bahnleitwalze is pivoted. The crushing tool is integrated into the Bahnleit- device and adjacent to the web guide roller arranged that additional Lich for changing the lateral position of the web-like material is also a refraction of the web-like material. The material refraction takes place after which the web-shaped material has undergone a (first) directional correction or change when passing the pivotable web guide roll. After passing through the breaking tool, the material web is then preferably stress-free and planar and can be supplied to the further processing or processing. Stress-free in this context means that the material web preferably no longer has tensions when releasing external forces, which leads to curvatures, warping or rolling up of the material web. The material web is then on release of all external forces, in particular tensile forces on tape, which act on the web during web transport, preferably in a planar form and preferably has no tension on.

For a change in the lateral position of the web material, the web guide can be manually or automatically pivot by a correction or pivot angle. The web guide roller can be detected at both axial ends of each case an adjusting device, for example, a motor or adjusting cylinder, wherein the adjusting devices are moved synchronously to each other. In this way, the web guide roller can be pivoted about its center, whereby the lateral position of the web-shaped material can be adjusted. But the web guide roll can also be pivoted only by a single actuator or leidglich an actuator. In this case, the rotation can be transmitted in opposite directions to the respective ends of the rolls by means of and / or push rods. be gene. Alternatively, the web guide roll can be pivoted about a pivot axis ge, which does not extend through the center of the web guide roll. Instead of pivoting the web guide roll by means of at least one Stelleinrich device can also be provided that the web guide roller is manually displaced by a user.

It is useful if a sensor device are provided with at least one sensor for detecting the lateral position of the web-shaped material and a control and / or regulating device, designed to control and / or regulating the correction or swivel angle of the web guide in depen dence of a detected with the sensor lateral position of the sheet material. The sensor device detects the lateral position of the material bahnförmi gene and sends this information to the control and / or Regelungsein direction. The control and / or regulating device compares the sensor data representing the actual data with stored desired data and derives from a comparison of the two values a control command for the pivotable web guide roller. Corresponding commands are then directed by the control and / or Regulating device to the pivotable web guide roll or the adjusting device of the web guide roll. A corresponding correction angle of the web guide roller is then adjusted. Thus, an automatic control or adjustment and adjustment of the lateral position of the web-shaped material takes place. For example, a web edge sensor in the form of an ultrasonic sensor or an optical sensor can be provided as the sensor. For detecting the lateral position of the web-shaped material, for example, a line scan camera can be used.

The web guide roller is rotated to change the lateral position of the web-shaped Ma terials about a perpendicular to the axis of rotation of the web guide roller extending correction or pivot axis. The greater a desired lateral offset of the material web or the greater the deviation between the actual and the required target position of the material web, the greater the correction angle of the web guide roll is set.

The pivotable web guide roller can be designed as a heating and / or as a cooling roller. As a result, the functional density of the Bahnleit- device according to the invention increases additionally. Heating or cooling rollers are used in various applications. For example, a heating roller can activate a reaction layer. A cooling roller can be used, for example, for cooling the material web. In a preferred embodiment of the invention, the breaking tool is also movable, preferably pivotable, arranged. The web guiding roll and the breaking tool can preferably be rotated about mutually parallel pivoting axes. The pivotable arrangement of the breaking tool makes it possible in particular to align the breaking tool parallel to the web guide roll. The breaking tool can thus be adapted to the lateral offset of the material web, which is generated by the pivotable web guide roll. A pivoting of the breaking tool can be done automatically or manually.

In a further advantageous embodiment, the web guide roll and the breaking tool are synchronously pivotable. This makes it possible, in particular, to ensure that the web guide roll and the breaking tool are aligned parallel to each other at all times. Thus, an effective stress reduction in the material web is achieved after passing the web guide roll, and collisions between the web guide roll and the crushing tool during pivoting of the web guide roll can be excluded.

For a synchronous adjustment, a mechanical coupling of the web guide roller and the crushing tool can be provided, which simplifies the control and / or regulation when setting a specific correction or swivel angle of the web guide roller or a specific swivel angle of the breaking tool.

According to the invention, the breaking tool can be provided between two successively arranged in the transport direction of the material web guide rollers. Be the web guide rollers relative to the web guiding upstream and downstream, preferably non-pivoting guide rollers ge pivots depending on the pivot or correction angle can be a certain lateral offset of the web when passing the Bahnleitvorrichtung reach, the transport direction in front of the first web guide roll and the trans port direction after the second web guide roll can be parallel to each other and the lateral offset is also true by the distance between the web guide rollers be true. The distance between the adjacent web guide rollers may be, for example, between 50 and 1000 mm, preferably between 200 and 800 mm, more preferably between 300 and 400 mm. The distance between adjacent trailing rollers may also be selected to be larger, in particular for large web widths. In the area between the changes in direction of the material web, the material is then refracted at the breaking tool according to the invention. For the pivoting movement of the two web guide rollers, a common actuator can be provided. This actuator can also be used for the Schwenkbewe movement of the crushing tool. This particularly simplifies a synchronous adjustment movement of the web guide rollers and the breaking tool. The adjustment of the web guide rollers and the breaking tool can also be done via several separate actuators. The adjustment can be made electrically, hydraulically and / or pneumatically. For a common adjustment of the web guide rollers and the breaking tool, a measuring, control and / or regulating device can be provided.

The web guide roller and the breaking tool and, preferably, the further web guide roller can be arranged on a pivotable frame and thus be pivotally sam together. By rotating the frame, a certain lateral offset of the material web can be achieved. In addition, on the common Anord tion of web guide roller and crushing tool on the frame, a synchronous adjustment of web guide roller and crushing tool in a structurally simple and cost-effective manner possible. Preferably, at least two web guide rollers and in the transport region between the web guide rollers may be arranged a breaking tool so that it is sufficient for a synchronous pivoting movement of the web guide rollers and the breaking tool to rotate the frame by a certain correction or swivel angle. The A set of a rotating frame simplifies the synchronization of the web guide rollers and the breaking tool significantly, since only a single actuator or only borrowed an actuator for pivoting the web guide rollers and the crusher stuff on the swing frame is necessary. An alternative embodiment may comprise a pivotable frame, on which the web guide roll and, preferably, the further web guide roll is arranged, wherein the frame is movable relative to a fixedly arranged breaking tool. The breaking tool can be fastened, for example, to a stationary frame wall. It is understood that in all embodiments must be ensured in any case that the web-like material can be guided past the crushing tool that it can come to the desired refractive effect due to the contact in contact ns of the sheet material with the crushing tool.

The frame may include a fixed subframe and a pivotable top frame, wherein the pivotable top frame may be pivoted about an axis of rotation relative to the stationary subframe. The rotation axis the frame can be seen in the inlet region of the web in front of the web guide before. Such an arrangement allows a change in the lateral position of the material web at a low material web stress at the same time very short control path. Accordingly, this arrangement is particularly suitable for sensitive materials. However, the axis of rotation can also cut a transport plane of the web in the middle region between two web guide rollers and, preferably, fen through a longitudinal axis of the breaking tool duri. Preferably, in the transport direction in front of and / or behind the pivotable frame deflection rollers are provided for the material web, which may be further preferably non-pivotally mounted. The guide rollers are not stored on the frame. The pivotable frame with the web guide rollers and the breaking tool is thus arranged between preferably fixed deflection rollers, which ensures the exact material supply to the invention Bahnleitvor direction and material removal after generating a lateral offset and after the breaking of the material.

For breaking the material, a plurality of breaking tools following in the direction of transport of the material web may also be provided. Through the use of several rer crushing tools stresses in the web-like material can be gradually reduced or generated. This can be provided, for example, to achieve ei ne very precise and complete smoothing of the web. Vice versa can be generated by the use of multiple crushing tools and a higher voltage and / or a higher degree of curvature in the web-shaped material. In this case, each crushing tool is preferably provided in the stretched area between two adjacent rolls. The respective breaking tool and the rollers assigned to the respective breaking tool are then preferably facing different flat sides of the material web. About the crushing tool associated rollers, the web is clamped during breaking.

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

To change the refractive angle between the web-like material and a straightening surface of the breaking tool, the breaking tool can be designed to be adjustable. By adjusting the breaking tool, the position of the straightening surface can be adjusted change or adjust relative to the material web. By changing the refractive angle, it is possible to have a specific influence on the stress relief during the breaking of the material web or possibly also on the stress build-up in the material web.

For example, different degrees of smoothing of the sheet-like material can be achieved by changing the refractive angle. Also, any curvatures or stresses in the web material can be introduced into the web material. The smaller the angle of refraction between the straightening surface and the web-shaped material, the greater the tension that can be broken from the web-shaped material or the degree of smoothing. The larger the refractive angle, the lower the degree of smoothing. From a breaking angle of about 180 ° there is no deflection of the web-like material on the directional surface of the breaking tool, so that the refractive effect is close to zero.

Preferably, the distance between a straightening surface of the crusher and a plane defined by the two web guide rollers can be adjusted by displacement and / or offset or offset of the crushing tool relative to the defined plane. In this way, an accurate alignment of the straightening surface is possible relative to the sheet-like material. The adjustment can be made manually and / or automatically by means of an adjusting device.

The distance between the breaking tool and the two web guide rollers in egg ner plane defined by the web guide rollers, however, can be adjusted so that the breaking tool in and against the transport direction of the web to both web guide rollers may have the same distance.

It is not excluded that the adjustment of the breaking tool for changing the refractive angle by means of a control and / or regulating device follows. It may be provided with at least one sensor sensor means, wherein by means of the sensor, the curvature and / or voltage in the Ma terialbahn detected or measured and wherein, depending on the Messda th the adjustment of the crushing tool is carried out relative to the web guide rollers automatically.

Relative to a plane which is defi ned by the two adjacent web guide rollers, in particular by their longitudinal axes, the crushing tool can thus preferably only moved perpendicular to this plane and / or offset become. With a horizontal arrangement of the web guiding device, the crusher can thus be adjustable in height only by way of example only in the vertical direction. The breaking angle between the straightening surface and the web-shaped material can thus be adjusted or varied in a simple manner by means of a single setting parameter, which simplifies the adjustment.

In an advantageous embodiment, a crushing bar, a crushing roller or ei ne crushing roller is provided as a crushing tool. Suitable crushing bars are known for example from DE 38 33 804 A1. When using a crushing roller as a breaking tool, the diameter of the crushing roller may be less than 70% of the track roller diameter, preferably less than 50%, more preferably less than 30%. A crushing tool can advantageously have a crushing roller or two crushing rollers, which supported by ball bearings abge and are stored. It can also be provided for the crushing roller (s) one or more support rollers. In addition, an extraction can be provided on the crushing device, with which in particular in the area of the guide surfaces Par particle from dust, paper or the like can be sucked off continuously and / or discontinuously. Exhausting prevents soiling of the web material and damage by particles that may accumulate on the guide surfaces.

The above-described embodiments of the invention may be combined as needed, although not specifically mentioned. The disclosure of the invention is not limited to the combinations of inventive features given by the selected paragraph formatting.

Further features of the present invention will become apparent from the following description of two preferred embodiments of the invention with reference to the drawings and the drawings themselves. In this case, all described and / or illustrated features, alone or in any combination, the subject of the present invention, regardless of their Summary in the claims or their relationships. The invention will be explained in more detail below with reference to the figures; show it Fig. 1 is a schematic representation of a Bahnleitvorrich device according to the invention with two web guide rollers and an interposed breaking tool and Fig. 2 is a schematic representation of a Bahnleitvorrich device according to the invention with two crushing devices, which are each arranged between two adjacent web guide rollers.

In Fig. 1 is a sheet guiding device 1 for changing the lateral position of a web-like material 2 in the treatment or processing of web-shaped materials, preferably in the treatment or processing of a paper, cardboard, plastic, Verbundmaterial- or fabric web , shown with two web guide rollers 3 and a crushing device 4. The distance A between the two web guide rollers 3 may be based on the central longitudinal or rotational axis between 50 mm and 1,000 mm, preferably between 100 and 800 mm, further preferably between 300 and 400 mm. The distance between adjacent Bahnleitwal zen can also be chosen larger. In the embodiment shown, the wrap angle of the material web 2 with the web guide rollers 3 example, in each case at least 90 °.

The web-shaped material 2 is provided for example via a not shown roll before. The supply of the web-like material 2 for Bahnleitvor device 1 via at least one guide roller 6. The two web guide rollers 3 and the crushing device 4 are arranged on a swivel Baren upper frame 5. The pivotable upper frame 5 is pivotally connected to a stationary sub-frame 7 about an axis of rotation 8. The axis of rotation 8 runs in the embodiment shown through the inlet region of the sheet-like material 2 in the web guiding device 1, i. in the transport direction 9 of the sheet-like material 2 in the region of the first shown on the right in Fig. 1

Bahnleitwalze 3. It is also a structural design of the Bahnleitvor device 1 is not excluded, in which the axis of rotation 8 through the center of the upper frame 5 between the Bahnleitwalzen 3, which preferably coincides with the center of gravity of the upper frame 5. The position of the axis of rotation 8 but can also take any other position inside and outside of the upper frame 5 a. Between the web guiding device 1 and a further deflecting roller 10 arranged outside the upper frame 5, a sensor device 11 is arranged with at least one sensor. The sensor determines the actual position of the lateral position of the sheet-like material 2. If the actual position deviates from a desired position of the sheet-like material 2 required for the transport or processing process of the sheet-like material 2, or should a corresponding target position Can be set position, a corresponding control command to a likewise not shown Stel leinrichtung of the pivotable upper frame 5 is sent by a control and not-shown direction. The adjusting device causes a pivoting movement or rotation of the pivotable upper frame 5 about the stationary sub-frame 7, so that by adjusting the Bahnleitwal zen 3 relative to the guide rollers 6, 10, a certain lateral offset of the web-like material 2 is generated. The crushing device 4 has a breaking tool 12 in the form of a crushing bar. The web-shaped material 2 wraps around the web guide roller 3 during material transport, the web being clamped over the rollers 3. A straightening surface 13 of the breaking tool 12 dips into the plane of the material web. In this case, the material is pressed by the crushing tool 12 out of the plane and takes with the crushing or directional surface 13 of the crushing tool 12 a crushing or Umschlin supply angle 14 a. When pulling the web-shaped material 2 over the Brechflä surface 13, the material is broken, which leads, for example, to a smoothing of the Ma terialbahn. In principle, however, it is also possible, by drawing the sheet-like material 2 over the crushing surface 13, to build up a specific tension in the material web and thus to achieve a specific curvature of the material web.

Due to the common arrangement of the crushing tool 12 and the Bahnleitwal zen 3 on the pivotal upper frame 5 always parallel alignment of the straightening surface 13 is ensured to the web guide rollers 3. Thus, the straightening surface 13 can be optimally adapted to the transport direction 9 of the sheet material 2 who the. In addition, a space-saving and structurally simple and kosteni ge possibility created to integrate the functions "web guiding" and "breaking" in ei ne unit.

The refractive angle 14 can be changed by a vertical Flöheneinsteil shown in Fig. 1 availability of the breaking tool 12 (indicated by arrows 15 in Fig. 1) changed. In Flöhenverstellung the crushing tool 12 is perpendicular to a ver defined by the axes of rotation of the two web guide rollers 3 ver pushed.

By changing the refractive angle 14, it is possible to exert deliberate influence on a specific smoothing of the web-like material 2 when pulling over the straightening surface 13 or optionally also on the introduction of a specific clamping or curvature. The greater the refractive angle 14, the lower is for example the smoothing of the web-shaped material 2 achieved when pulling over the straightening surface 13. If the refractive angle 14 shown in FIG. 1 is approximately 180 °, for example, there is no smoothing or Refraction more. The material web 2 is then no longer under tension with the straightening surface 13 of the crushing tool 12 into contact. Analog leads a small refractive angle 14 to a ho hen smoothing or degree of curvature. The position of the breaking tool 12 can be changed manually and / or automatically changed and / or adjusted. For automatic height adjustment, an electrically, hydraulically or pneumatically operated adjusting device may be provided. The position of the breaking tool 12 can also be adjusted as a function of the tension in the web-shaped material 2, preferably automatically. For this purpose, a correspondingly designed measuring, control and / or regulating device may be provided (not shown in FIG. 1).

In addition, an embodiment is not excluded in which the breaking tool 12 is adjusted along the arrows 16 in the plane defined by the axes of rotation of the two web guide rollers 3. By adjusting the crushing tool 12 in or against the transport direction 9 of the web, the breaking angle 14 can also be changed.

In Fig. 2, another embodiment of a web guiding device 1 is shown schematically. The same reference numerals of FIGS. 1 and 2 shown embodiment designate construction and / or functionally identical components or assemblies.

To change the lateral position of a web-shaped material 2, the web guiding device 1 shown in FIG. 2 has four web guiding rollers 17, 18. For multiple breaking of the material web, two crushing devices 19, 20 are provided. Each breaking device 19, 20 has a breaking tool 22. The nature and construction of the breaking devices 19, 20 may correspond to the type and structure of the breaking device 4 shown in FIG. 1 and described above. The web guide rollers 17, 18 and the crushing devices 19, 20 are arranged on an upper frame 5. The upper frame 5 is pivotally connected to a fixed frame 7 about an axis of rotation 8. By pivoting the upper frame 5, a certain lateral offset of the web-shaped material 2 can be achieved. In the embodiment shown in FIG. 2, the axis of rotation 8 can lie in the region of the material inlet in the web guiding device 1, that is to say in the transport direction 21 of the material web in front of the first web guiding roller 17. The first front breaking device 19 is located between the web guiding rollers 17 in the transporting direction 21 arranged. Between the two subsequently arranged web guide rollers 18, a second crushing device 20 is arranged. In this way, each breaking tool 22 is assigned a pair of web guiding rollers 17, 18, the respective breaking tool 22 and the web guiding rollers 17, 18 assigned to this breaking tool 22 being different flat sides of the web-shaped web guide rollers

2 facing materials. The web-shaped material 2 wraps around the material transport the respective pair of rollers, whereby the web over the web guide rollers 17, 18 is clamped. A straightening surface of the respective breaking tool 22 dips into the plane of the material web between the web guide rolls 17, 18.

The two crushing tools 22 act on opposite flat sides of the web-shaped material 2. In this way, a smoothing of both Be th done. Alternatively, it is also possible to introduce stresses and thus a curvature into the sheet-like material 2 from both sides.

To change the refractive angle 14, the crushing tools 22 perpendicular to the right each by the adjacent web guide rollers 17, 18 set Ebe NEN, that is in Fig. 2 to the left and / or right, adjust. The crushing devices 19, 20 can be adjusted manually or automatically for this purpose.

For changing, in particular for controlling and / or regulating, the lateral position of the web-shaped material 2, a control and / or Re gelungseinrichtung not shown is provided. If a sensor 11 of the control and / or regulating device detects a deviation of the lateral actual position from a required desired position of the web-like material 2 when exiting the web guiding device 1, a corresponding control or regulating command is generated and sent to a control device not shown sent. The adjusting pivots the Upper frame 5 such that the lateral position of the sheet material 2 is changed to the desired extent.

In principle, it is possible that the web guiding device 1 also has more than two breaking devices 19, 20, each with associated roller pairs.

LIST OF REFERENCE NUMBERS

1 web guiding device 15 13 directional surface

2 Material 14 Breaking angle 3 Web guiding roller 15 Arrow

4 crushing device 16 arrow

5 upper frame 17 web guide roller

6 guide roller 20 18 web guide roller

7 Companies 19 Crushing device 8 Rotational axis 20 Breaking device

9 transport direction 21 transport direction

10 guide roller 22 breaking tool

1 1 sensor device 25

12 breaking tool

Claims

claims:

1. Bahnleitvorrichtung (1) for changing the lateral position of a bahnför shaped material (2) in the treatment or processing of web-like materials (2), preferably in the processing or processing of a paper, cardboard, plastic,

Composite material or fabric web, with at least one pivotally arranged web guide roll (3, 17, 18), wherein the web guide roll (3, 17, 18) at Materialtrans port is at least partially looped by the web-like material (2) and wherein the lateral position of the web-like Material (2) by pivoting the web guide roll (3, 17, 18) is changed, characterized in that in the stretch region of the sheet material (2) between the pivotable web guide roll (3, 17, 18) and another web guide roll (3, 17, 18) at least one breaking tool (12, 22) is provided.

2. Bahnleitvorrichtung (1) according to claim 1, characterized in that the

Breaking tool (12, 22) movable, preferably arranged pivotally, is.

3. Bahnleitvorrichtung (1) according to any one of the preceding claims, characterized in that the web guide roll (3, 17, 18) and the breaking tool (12, 22) are synchronously pivotable.

4. Bahnleitvorrichtung (1) according to any one of the preceding claims, characterized in that the breaking tool (12, 22) between two in the transport direction Rich (9, 21) of the material (2) successively provided pivotally arranged web guide rollers (3, 17, 18) is.

5. web guiding device (1) according to one of the preceding claims, characterized in that the web guide roll (3, 17, 18) and the breaking tool (12, 22) and, preferably, the further web guide roll (3, 17, 18) on a pivot - Baren frame (5) are arranged or that the web guide roll (3, 17, 18) and, preferably, the further web guide roll (3, 17, 18) on a pivotable frame (5) are arranged, wherein the frame (5) opposite a fixed to ordered breaking tool (12, 22) is pivotally.

6. Bahnleitvorrichtung (1) according to any one of the preceding claims, characterized in that a plurality of crushing tools (12, 22) are provided, wherein, preferably, each crushing tool (12, 22) in each case two web guide rollers (17, 18) are assigned and wherein, more preferably, the crushing tools (12, 22) on different flat sides of the sheet-like material (2) are arranged.

7. Bahnleitvorrichtung (1) according to any one of the preceding claims, characterized in that the breaking tool (12, 22) for changing the Brechwin cle (14) between the sheet-like material (2) and a straightening surface (13) of the breaking tool (12, 22 ) is adjustable relative to the web guide roll (3, 17, 18).

8. Bahnleitvorrichtung (1) according to any one of the preceding claims, characterized in that the distance between a directional surface (13) of the crusher zeugs (12, 22) and one of the web guide rollers (3, 17, 18) defined plane by moving and / or offset of the breaking tool (12, 22) is adjustable.

9. Bahnleitvorrichtung (1) according to any one of the preceding claims, characterized in that the distance between the breaking tool (12, 22) and the two web guide rollers (3, 17, 18) in one of the web guide rollers (3, 17, 18) defi level is immovable.

10. Bahnleitvorrichtung (1) according to any one of the preceding claims, characterized in that as a breaking tool (12, 22) at least one crushing bar, ei ne crushing roller or a crushing roller is provided.