Apparatus and method for transferring a fibrous material web

Abstract

A transfer apparatus (10) for transferring a strip (RF), preferably an edge strip (RF) or transfer strip (RF), of a fibrous material web within a machine for producing or treating the fibrous material web (F), preferably paper, cardboard or tissue web, from a first to a further machine section, in particular from a web-discharging supporting element (3) onto a web-receiving supporting element (4) or into a cable guide (26) which is assigned to a web-receiving supporting element (4), is located outside the path taken by the web and is formed at the start of a cable arrangement. According to the invention, in the machine direction (MD) the deflection element (8) is in the form of at least one transfer profile (80), preferably a transfer profile (80) which has a straight extent in the support-arm direction or a transfer profile which has an L-shaped extent in the support-arm direction, and the transfer profile (80) has a surface contour in the form of an aerodynamic wing profile oriented towards the strip (RF).

Description

[0001] Device and method for transferring a fibrous web

[0002] The invention relates to a device for transferring a fibrous web, in particular an edge strip, preferably a transfer, feed, or threading strip, as part of a fibrous web. The transfer device is typically arranged within a machine for processing a fibrous web between two successive machine sections, for example, a forming section and a press section, or a press section and another press section, or a press section and a subsequent drying section. Arrangements between other sections, such as a drying section to a calender section, or a calender to a winding section, or even within a section itself, are also conceivable. The transfer takes place either from a discharging support element, for example, a forming screen, press felt, drying screen, or a roller surface, to one or two subsequent support elements or into a gap formed by two support elements.The strip can also be transferred into a cable guide located outside the track path and formed at the beginning of a cable arrangement.

[0003] It further relates to a machine for treating a fibrous web and a method for transferring it using at least one such transfer device according to the invention.

[0004] The fiber web to be treated can be, in particular, a paper, cardboard or tissue web.

[0005] Up to now, the feed strip in question, e.g., a paper strip, is shot into a cable guide located externally in the transverse direction, i.e., perpendicular to the web direction. This is typically achieved using cut-off blow tubes, blow tables, guide plates, and / or vacuum belts. However, the reliability with which the feed strip can be inserted into such an external cable guide depends heavily on the basis weight of the fiber web, the machine speed, and other parameters. In particular, the air nozzles and / or the flow rate must be constantly readjusted to the specific paper parameters.

[0006] An embodiment of a manual transfer device for an edge strip or transfer strip into a cable arrangement is disclosed, for example, in German patent application DE 10 2007 022 393 A1. The transfer device is movably mounted on a frame and comprises a drive unit which can move a deflection element located at the end of the transfer device projecting into the machine from a starting position to a functional position, thereby achieving improved deflection into the cable arrangement.

[0007] An automatic transfer device and a transfer method for a flexible web, in particular a paper web or a threading tape, is disclosed, for example, in EP 1 245 729 A1. The transfer device can take a threading tape from a web-discharging web guide surface and transfer it to a web-receiving web guide surface via a belt conveyor device.

[0008] A transfer device for a material web into a cable guide arranged outside the material web path is disclosed, for example, in EP 1 775 378 A1. The transfer device is movably arranged in a guide device, and a suction head is positioned at the end of the transfer device projecting into the machine. A transfer strip can be deflected from the machine into a cable arrangement arranged transversely to the machine by means of a control system, preferably automatic.

[0009] A disadvantage of the available transfer devices, particularly for still-damp fiber webs such as those following a press section, is that the transfer efficiency and the probability of a successful transfer are not yet sufficiently high and can be significantly below 50%. The still relatively damp fiber web, for example, directly after a forming or pressing section, can exhibit a wide range of fiber properties. This makes full automation and adjustment of the transfer process quite difficult, even with advanced levels of automation. The large range of properties can often only be compensated for and successfully transferred through direct interaction by a human operator, which would not be possible with automation.

[0010] A further disadvantage, due to the greater variation in the properties of the fiber webs, is that in the event of failed transfer attempts, the operator tends to enable the transfer using available, but questionable, aids, and to enter the danger zone of the running machine section either with the aids or themselves, which poses a considerable safety risk to life and limb with the parts moving at high speeds.

[0011] A further disadvantage of the available, especially automatic, transfer devices is that they typically require a large amount of space and their integration into the fiber web machine, such as a paper machine, is very complex. For example, retrofitting existing machines with the known transfer devices is often not possible or requires extensive machine modifications.

[0012] The invention is based on the objective of creating an improved transfer device and an improved machine of the type mentioned above, in which the aforementioned problems are eliminated. In particular, the aim is to ensure the most reliable possible strip transfer between the relevant sections of the machine, for example, a paper machine.

[0013] A further object of the invention is to provide a simplified transfer device that allows for flexible adaptation to the existing machine parameters and also requires little space, so that it can be easily retrofitted into existing machines with limited installation space. The transfer device for transferring a strip, preferably an edge strip or transfer strip, within a machine for the production or treatment of the fibrous web, preferably paper, cardboard, or tissue web, from a first to a further machine section, in particular from a web-discharging support element to a web-receiving support element or into a cable guide formed at the beginning of a cable arrangement and associated with a web-receiving support element, arranged outside the web path, typically comprises

[0014] • a bearing and guiding device, wherein the bearing and guiding device is connectable to a frame of the machine and,

[0015] • a support arm with a deflection element and an operating device, wherein the deflection element is arranged at the end of the support arm projecting into the machine and the operating device is arranged at the end of the support arm projecting out of the machine and,

[0016] • wherein the support arm is guided in the bearing and guide device such that the support arm is movable in a first direction and the deflection element can be positioned with a linear movement in the transverse direction of the machine and,

[0017] • wherein the deflection element is movable in a second direction, such that the deflection element can be aligned with a rotational movement, such that the strip is predominantly guided when passing through the deflection element.

[0018] According to the invention, the deflection element in the machine direction MD is designed as a transfer profile, preferably as a transfer profile with a straight extension in the support arm direction or as a transfer profile with an L-shaped extension in the support arm direction, and that the transfer profile has a surface contour aligned with the strip RF in the form of an aerodynamic wing profile, in particular with a profile length L, camber C and a camber recess (CR). In an alternative embodiment, the transfer device is characterized in that the deflection element is designed as a transfer profile with a straight extension in the support arm direction.

[0019] This means that the leading edge forms a horizontal, straight line in the direction of machine travel MD.

[0020] In an alternative embodiment, the transfer device is characterized by the fact that the deflection element is designed as a transfer profile with an L-shape extending in the direction of the support arm.

[0021] This means that the leading edge, in the direction of machine travel MD, forms an L-shape or a shoe shape, with the transfer profile in L-shape having a long and a short L-part, and both being connected to each other at one end at essentially 90°.

[0022] This design ensures a highly reliable transfer of the fiber web between different sections of the machine, such as a paper machine. For example, it allows for safe transfer from a press section to a single-row dryer section or even to a double-row dryer section directly onto the web-receiving support element. Alternatively, the web can also be transferred initially to a cable transfer system located outside the fiber web and associated with the web-receiving support element.

[0023] In the context of the present application, a transfer profile is understood to mean that the transfer profile has a defined shape or surface contour on the upper surface pointing towards the strip, which is based on the definition of the skeleton line of an aerodynamic airfoil.

[0024] The definition of the transition airfoil is derived from the generally known definition of airfoil shapes from aviation. However, instead of specifying a particular thickness distribution on the skeleton line, only the geometry of the skeleton line is used as the contour of the upper surface of the transition airfoil. The curved skeleton line and a straight chord line are defined, as is customary, between a leading edge (LE) and a trailing edge (TE) of the airfoil.

[0025] In the transfer profile, the front edge LE of the profile is the edge of the transfer profile that is prior in the machine direction MD and the rear edge TE is the edge that is subsequent in the machine direction.

[0026] The straight profile chord is a straight connecting line between the leading edge LE and the trailing edge TE and defines the profile length L.

[0027] The transfer profile can be geometrically defined only by the skeleton line, which can be connected either directly at individual suspension points or in a closed manner to the support arm and / or a control device.

[0028] The transfer profile can also be defined by the skeleton line and profile chord, thus forming a cavity in which further supply lines can be arranged within the cavity.

[0029] The skeletal line is defined in relation to the profile chord and by a curvature as the distance between the profile chord and the skeletal line, and a curvature recession as the relative position in relation to the profile length or profile chord starting from the leading edge LE.

[0030] In an alternative embodiment, the transfer device is characterized in that the transfer profile has a profile length between 60 mm and 300 mm, preferably between 80 mm and 200 mm. In an alternative embodiment, the transfer device is characterized in that the transfer profile has a curvature between 0 mm and 50 mm, preferably between 10 mm and 30 mm.

[0031] In an alternative embodiment, the transfer device is characterized in that the transfer profile is designed with a camber between 15% and 85%, preferably 20% and 65%, in particular between 25% and 45%.

[0032] In an alternative embodiment, the transfer device is characterized in that the transfer profile has a total extension in the support arm direction of between 150 mm and 400 mm, preferably between 200 mm and 350 mm. In the case of an L-shaped extension, the total extension in the support arm direction is understood to be the length of the short and long L-sections.

[0033] In an alternative embodiment, the transfer device is characterized in that the transfer profile has a straight extension in the second direction at an orientation angle α less than or equal to + / -90°. 0 is alignable to the horizontal around an axis parallel to the transverse direction CD in the machine running direction MD, or that the transfer profile with L-shape extends in the second direction at an alignment angle α less than or equal to + / -30 0The vertical axis is alignable around an axis parallel to the machine direction MD, preferably a rotary bearing between the end of the support arm projecting into the machine and a free end of the short L-shaped element.

[0034] In an alternative embodiment, the transfer device is characterized in that the transfer profile has a transverse extent CD of less than or equal to a factor of 2.5, preferably less than or equal to a factor of 2, of a transverse width CD of the strip RF. In an alternative embodiment, the transfer device is characterized in that a nozzle arrangement is included in the region of the transfer profile and that the nozzle arrangement includes at least one outlet opening for the discharge of a medium, preferably compressed air, in a first discharge direction S1.

[0035] In an alternative embodiment, the transfer device is characterized in that a further nozzle arrangement is included in the area of ​​the transfer profile and that the further nozzle arrangement includes at least one opening for the outflow of a medium, preferably compressed air, in a second outflow direction.

[0036] In an alternative embodiment, the transfer device is characterized in that the rotary rod extends across the entire width of the deflection element in the transverse direction and that the nozzle arrangement is integrated into the rotary rod in such a way that both are manufactured from a single component.

[0037] In an alternative embodiment, the transfer device is characterized in that the nozzle arrangement in its first outflow direction has an outflow angle β less than or equal to +15°, preferably less than or equal to +10°, and greater than 0° or less than 0° and greater than or equal to -5°, and greater than 0°, wherein the impact angle β is relative to the point of impact between the first outflow direction S1 and an imaginary connecting line between a leading edge LE and a maximum camber point C, CR of the transfer profile.

[0038] Advantageously, by aligning the nozzle arrangement as tangentially as possible to the curved profile, the air can be slowed down and swirled as little as possible, which improves both the low-pressure area on the curved profile and the flow velocity of the exiting air.

[0039] Furthermore, a uniform deflection of the airflow is desired in order to keep the pressure range as constant as possible. In an alternative embodiment, the transfer device is characterized by the fact that the nozzle arrangement comprises several openings in the transverse direction, preferably up to 1 opening per 1 cm width in the transverse direction of the deflection element.

[0040] In an alternative embodiment, the transfer device is characterized in that the nozzle arrangement in the first outflow direction S1 and / or the further nozzle arrangement in the second outflow direction S2 each has a velocity from the openings greater than or equal to 5 times, preferably greater than or equal to 10 times, a material web speed or strip speed.

[0041] In an alternative embodiment, the transfer device is characterized in that a control device, preferably a rotary rod or a push rod, is arranged within the support arm, which extends from the operating device to the transfer profile and can be connected to both.

[0042] In an alternative embodiment, the transfer device is characterized in that the control device is a rotary rod and directly converts a rotary movement of the operating device, preferably without any reduction or gearing, into a rotary movement of the transfer profile with a straight extension, whereby an alignment angle a of the transfer profile about an axis parallel to the transverse direction CD is enabled.

[0043] In an alternative embodiment, the transfer device is characterized in that the control device can be connected to a gaseous medium supply, in particular a compressed air supply, on the side facing the operating device, so that a nozzle arrangement and / or a further nozzle arrangement is supplied with a medium, preferably compressed air. In an alternative embodiment, the transfer device is characterized in that the support arm is a preferably straight, hollow square precision tube.

[0044] In an alternative embodiment, the transfer device is characterized in that the support arm is designed such that it has a linear movement of less than or equal to 1 m, preferably less than or equal to 0.5 m, in the first direction in the bearing and guide device.

[0045] In an alternative embodiment, the transfer device is characterized in that the straight, hollow square precision tube has a cross-section of less than or equal to 100 x 100 mm, preferably less than or equal to 60 x 60 mm, and

[0046] In an alternative embodiment, the transfer device is characterized by the fact that the straight, hollow square precision tube has a length of less than or equal to 1.5 m.

[0047] In an alternative embodiment, the transfer device is characterized in that the bearing and guide device comprises at least 4 90° V-groove support rollers, and that 2 of the 90° V-groove support rollers engage the square precision tube at each longitudinal edge in such a way that the square precision tube is supported on all four sides of the cross-section.

[0048] In an alternative embodiment, the transfer device is characterized in that the bearing and guide device can be rotatably mounted at a connection point with the frame, so that the transfer device can be rotatably and positioned about the connection point with the frame in a third direction in a machine direction-transverse plane MD-CD, preferably rotatably and positionably in a rotation angle T of less than or equal to -90°, preferably from a 360° park position PO to a 270° operating position P1 , P2.

[0049] Advantageously, the third direction of movement allows the transfer device to be placed in a park position PO when not in use during normal machine operation, enabling space-saving storage away from walkways and within easy reach of the machine's operating personnel.

[0050] In an alternative embodiment, the transfer device is characterized in that the control device, preferably a rotary rod, extends over the entire width of the deflection element in the transverse direction CD and that the nozzle arrangement is integrated into the control device, preferably a rotary rod, such that the control device and the nozzle arrangement are manufactured from one component.

[0051] In an alternative embodiment, the transfer device is characterized in that the operating device comprises a first and a second operating element, in particular a third operating element.

[0052] In an alternative embodiment, the transfer device is characterized in that the first operating element comprises two ergonomically shaped gripping units for receiving the two hands of the operator.

[0053] In an alternative embodiment, the transfer device is characterized by the fact that the two ergonomic gripping units are designed with a distance of greater than or equal to 250mm, preferably greater than or equal to 350mm.

[0054] Advantageously, by spacing the gripping units, operating forces of less than or equal to 250N can be enabled.

[0055] In an alternative embodiment, the transfer device is characterized in that the second operating element can be connected to a control system of the machine, such that a gaseous medium supply, preferably compressed air supply, and / or a transfer process, preferably cutting the strip RF, can be activated. In an alternative embodiment, the transfer device is characterized in that it includes a display device.

[0056] In an alternative embodiment, the transfer device is characterized in that the display device indicates a current position of the deflection element in the first direction, preferably linear position, and / or in the second direction, preferably angular position.

[0057] In an alternative embodiment, the transfer device is characterized in that the display device stores and displays a previous position of the deflection element in the first direction, preferably linear position, and / or in the second direction, preferably angular position.

[0058] In an alternative embodiment, the transfer device is characterized in that the deflection element is designed as a transfer profile with an L-shape, and that the transfer profile comprises a long and a short L-section, both sections being connected at one end at an angle of substantially 90° to each other. The free end of the short L-section is connectable to the support arm via an enclosed pivot joint, allowing the transfer profile with an L-shape to perform the second direction and the rotational movement in the CD-z plane. The free end of the short L-section is also connectable to the support arm via an enclosed pivot joint, enabling the transfer profile with an L-shape to perform a rotational movement in the CD-z plane.

[0059] In an alternative embodiment, the transfer device with a transfer profile having an L-shape is characterized in that the control device is a push rod and converts a translational movement into a rotational movement of the deflection element, and that the transfer profile with an L-shape has a pivot range from which a change between a rest position and a working position is possible. In an alternative embodiment, the transfer device with a transfer profile having an L-shape is characterized in that the transfer profile with an L-shape has an overall extent over the L-shape, an extent in MD, and a thickness.

[0060] In an alternative embodiment, the transfer device with a transfer profile having an L-shape is characterized in that the transfer profile with L-shape is designed as a hollow profile with a profile length L in MD. The contour of the hollow profile is defined by the skeleton line and the profile chord between the leading and trailing edges.

[0061] In an alternative embodiment, the transfer device with a transfer profile having an L-shaped extension is characterized in that the nozzle arrangement in its first outflow direction S1 is oriented in the machine running direction MD and away from a surface of the transfer profile, and that the outflow direction S1 has an outflow angle β, in particular with respect to an imaginary tangent on the surface of the transfer profile at an outflow opening, of less than or equal to +30°, preferably less than or equal to +20°, and greater than 0°.

[0062] In an alternative embodiment, the transfer device is characterized in that the nozzle arrangement is integrated into the transfer profile, such that the transfer profile and the nozzle arrangement are manufactured from one component, preferably by an additive or 3D printing manufacturing process.

[0063] In an alternative embodiment, the transfer device is characterized in that the nozzle arrangement is located at a position greater than or equal to 5% to less than or equal to 40% of the profile length L from the leading edge LE to the trailing edge TE of the transfer profile. In an alternative embodiment, the transfer device with an L-shaped transfer profile is characterized in that the further nozzle arrangement is oriented in its second outflow direction S2, preferably in a CD-z plane, opposite to the transverse direction and in the vertical direction.

[0064] In an alternative embodiment, the transfer device with a transfer profile in a straight extension and / or L-shape extension is characterized by the fact that the transfer profile is manufactured using an additive manufacturing process, preferably a 3D printing process.

[0065] In an alternative embodiment, the transfer device with an L-shaped transfer profile is characterized by the fact that the transfer profile is made of a pressure-resistant material with a pressure resistance of up to 5 bar.

[0066] In an alternative embodiment, the transfer device with a transfer profile in a straight extension and / or L-shape extension is characterized by the fact that the transfer profile is made of a non-swelling material.

[0067] In an alternative embodiment, the transfer device with a transfer profile in a straight extension and / or L-shape extension is characterized by the fact that the transfer profile is made of an embrittlement-free material.

[0068] Likewise, a machine for the production and / or treatment of a fibrous web with at least one transfer device according to the invention is claimed.

[0069] In an alternative embodiment, the machine is characterized in that a first transfer device with a deflection element is designed and arranged as a transfer profile with a straight extension in the direction of the support arm after a web-discharging support element, and that a second transfer device with a deflection element is designed as a transfer profile with an L-shaped extension in front of a web-receiving support element.

[0070] In an alternative embodiment, the machine is characterized in that the transfer device is arranged on a web-distributing support element, preferably a roller and / or a drying cylinder, in an angular position y1 between 0° and 180°, preferably in a position between 30° and 120°.

[0071] In an alternative embodiment, the machine is characterized in that the transfer device is arranged on a web-receiving support element, preferably a roller and / or a drying cylinder and / or a wire cutter, in an angular position y2 between 270° and 360°, preferably in a position between 290° and 340°.

[0072] In an alternative embodiment, the machine is characterized in that the strip or web of material to be transferred has a moisture content of more than 45%, in particular more than 55%, preferably more than 65%.

[0073] In an alternative embodiment, the machine is characterized in that the transfer device is arranged immediately after a forming section and the strip to be transferred is taken from a forming section.

[0074] In an alternative embodiment, the machine is characterized in that the transfer device is arranged immediately after a press section and the strip to be transferred is taken from a press section.

[0075] In an alternative embodiment, the machine is characterized in that the transfer device is arranged directly between two press sections and the strip to be transferred is taken from one press section and received by another press section.

[0076] In an alternative embodiment, the machine is characterized in that the transfer device is arranged within and / or immediately after a drying section and the strip to be transferred is taken from a drying cylinder of the drying section.

[0077] In an alternative embodiment, the machine is characterized in that the transfer device is arranged immediately after a drying section and the strip to be transferred is taken from a last drying cylinder of an area of ​​the drying section which has only one row of drying cylinders.

[0078] A method for transferring a strip RF, preferably an edge strip RF or transfer strip RF, within a machine for producing or treating the fibrous web F, preferably paper, cardboard or tissue web, using a transfer device according to claim 1, wherein a single operator a) moves the transfer device from a park position PO to a first functional position P1, and b) positions the transfer profile in a first direction with a linear movement in the transverse direction CD of the machine to a second functional position P2, and c) aligns the transfer profile in a second direction with a rotational movement to receive the strip in a third functional position P3, and d) activates a gaseous medium supply, preferably a compressed air supply, for removing and / or receiving the strip.and e) performs a change in the orientation in the second direction and / or a change in the third direction of the transfer device in the fourth operating position P4 after activation of the gaseous medium supply, preferably compressed air supply, or f) performs a change in the position of the first direction of the transfer device in the fourth operating position P4 after activation of the gaseous medium supply, preferably compressed air supply, until the strip is picked up by the transfer profile and transferred to the web-receiving support element or to a web-receiving support element associated with it, arranged outside the web path, and formed at the beginning of a cable arrangement.

[0079] An alternative embodiment of the method is characterized in that a single operator, after initially grasping the operating device with both hands, positions and aligns the transfer profile from a safe working area outside the web path, and that the gaseous medium supply, preferably compressed air supply, is activated directly at the operating device.

[0080] The solution according to the invention is not limited to a specific transfer situation. It can be used to transfer an edge strip between a press section and a first element of a drying section, between individual elements of the drying section, and / or between a drying section and a downstream processing unit. Due to its compact size, even very confined transfer areas are possible.

[0081] The solution according to the invention is explained below with reference to figures.

[0082] Figures 1a to 1e show, in a schematically simplified representation, the basic structure of a transfer device in a machine for the production of fibrous webs and the basic principle of the functional positions P1 to P4 and parking position PO; Figures 2a, 2b, 2c show the coupling between the operating device and the deflection element as a transfer profile with a straight extension in the direction of the support arm;

[0083] Figures 3a and 3b show a detailed side and top view of the deflection element as a transfer profile with a straight extension in the direction of the support arm;

[0084] Figures 4a, 4b, 4c show a specific installation situation of a device according to the invention during the transfer of a fibrous web from a web-discharging support element to a web-receiving support element of a further machine section;

[0085] Figures 5a, 5b, 5c show in a schematically simplified representation the basic principle and basic structure of a transfer device designed according to the invention in a machine for the production of fibrous webs;

[0086] Figures 6a to 6c show a side and top view as well as a section of the hollow profile through the deflection element designed as a transfer profile with L-shape extension;

[0087] Figures 7a to 7c show the transfer device with transfer profile with L-shape extension in three functional positions P2 to P4.

[0088] To clarify the individual directions, a higher-level Cartesian coordinate system is shown in the figures, which can be used to illustrate the individual directions. The x-direction represents the longitudinal extent, also known as the machine direction (MD). The y-direction corresponds to the direction perpendicular to the machine direction and is called the cross-direction (CD), while the z-direction corresponds to the vertical direction. Figures 1a to 1e illustrate, in a simplified schematic representation, the basic structure of a transfer device 10 according to the invention, with a transfer profile extending straight in the direction of the support arm in a machine 1 for transferring a strip RF in its functional positions PO to P4. The transfer device 10 is shown at least from a top view of the MD-CD plane from the z-direction.

[0089] In Figures 1 a and 1 c, a side view is additionally shown by a dividing line to the left of the top view, showing a view of the MD-z plane in the CD direction for the representation of the operating device 60 at the end of the support arm 21 projecting from the machine.

[0090] In Figures 1 a and 1 c, a side view is additionally shown by a dividing line to the right of the top view, showing a view of the MD-z plane opposite the CD direction, for a representation of the deflection element 8 on the end of the support arm 21 projecting into the machine 1.

[0091] For the transfer, the strip RF is transferred from a web-discharging support element 3 to a web-receiving support element 4 of the machine 1 following the functional positions P1 , P2 and P3 or P4 one after the other.

[0092] The functional position PO, shown only in Figure 1 e, is assumed before and after a transfer process and represents a so-called park position PO of the transfer device 10 in normal operation of the machine 1.

[0093] In the illustrated embodiment of the transfer device 10, the support elements 3, 4 are simplified as rollers or cylinders; however, the support elements 3, 4 can also be coverings or screens which are guided over or between deflection elements such as rollers or cylinders.

[0094] The transfer device 10 comprises a bearing and guide device 34, a support arm 21, a deflection element 8 and an operating device 60. The deflection element 8 is located at the end of the support arm 21 projecting into the machine, the operating device 60 is located at the opposite end of the support arm 21, and the bearing and guide device 34 is located between them.

[0095] The bearing and guiding device 34 can be connected to a frame 6 or a foundation 6 of the machine 1 and is rotatably mounted at a connection point, so that the transfer device 10 can be rotated about the connection point with the frame 6 in a third direction 44 in a machine running direction cross-plane (MD-CD).

[0096] The transfer device 10 comprises a support arm 21 with a deflection element 8, wherein the deflection element 8 is movably arranged at the end of the support arm 21 projecting into the machine 1. The support arm 21 is guided in the bearing and guide device 34 and is movable in a first direction 40, whereby the deflection element 8 at the end of the support arm 21 projecting into the machine 1 can thus be directly positioned by a linear movement 40 in the transverse direction CD of the machine 1.

[0097] The support arm 21 can be designed as a square precision tube, thus enabling easy movement in the bearing and guide device 34 while maintaining high rigidity free from excessive deflection and twisting in the functional positions P2, P3 and / or P4 extended into the machine 1, which are shown in Figure 1b, 1c and 1d.

[0098] A stable position of the deflection element 8 relative to the support elements is necessary for reliable transfer. For example, the deflection element 8, when positioned in machine 1, must exhibit little to no tendency to flutter or vibrate, as the distances to the support elements are less than 50 mm, often even less than 10 mm or less than 2 mm.

[0099] Two, preferably adjustable, stop elements 70 can be provided on the support arm 21, which define an end position for the operator in the fully retracted functional position P1 and / or the fully retracted functional position P2. Further stop elements 71 can be provided on the frame 6 of the machine 1. These additional stop elements 71 define end positions in the third direction 44, for example, the parking position PO or the functional positions P1 and P2.

[0100] Furthermore, the deflection element 8 is movable in a second direction 42, such that the deflection element 8 can be aligned with a rotational movement 42 in an orientation angle a, and the strip RF is predominantly guided when passing through the deflection element 8.

[0101] Furthermore, a display device 68 for the alignment of the deflection element 8 in the machine 1 can be provided on the support arm 21, the operating device 60, or the bearing and guide device 34. For example, a display showing the linear position in the CD direction and / or the alignment angle α is conceivable.

[0102] The operating device 60, which is arranged at the end of the support arm 21 projecting from the machine, is designed for manual operation by a single operator. It comprises a first operating element 62 and a third operating element 66.

[0103] Figure 1a shows the transfer device 10 in the functional position P1, after it has been rotated from the parking position PO (Figure 1e) in a rotary movement 44 in the MD-CD plane by essentially +90° around the connection point between bearing and guide device 34 and frame 6.

[0104] The operator grasps the operating device 60 and, in the third direction of movement 44, rotates the transfer device 10, which is in the functional or parked position PO, into the functional position P1 around a mounting point of the bearing and guide device 34 with the frame 6. The functional position P1 is defined as the support arm 21 being fully extended from the machine 1.

[0105] As shown in Figure 1b, following Figure 1a and operating position P1, the deflection element 8 in the machine 1 is positioned at the height of the strip RF running off the dispensing support element 3 by the operator, who holds the first control element 62 with both hands on the control device 60, in operating position P2 in the CD direction with a linear movement 40 in a first direction. Optionally, it may be necessary for the deflection element 8 to project into the machine 1 as far as the stop element 70, as shown in Figure 1c.

[0106] Following the operating position P2, the operator positions the deflection element 8, as shown in Figure 1c as operating position P3, essentially in a second direction 42, i.e., a rotational movement 42 about an axis parallel to the CD direction. The operating device 60 initiates a rotational movement 42 about an alignment angle α, and a control device 82, preferably a rotary rod 82, arranged in the support arm 21, presets the alignment angle α about an axis parallel to the CD in the transverse direction on the deflection element 8. Once the deflection element 8 has reached a suitable position for transferring the strip, the operator, who still holds both hands on the first operating element 62, activates both nozzle assemblies 84 and 86 encompassed in the deflection element 8 by actuating a second operating element 64, for example, with the thumb of one hand.

[0107] The operator must now, by simultaneously adjusting the second direction 42 and the third direction 44 (Figure 1d - operating position P4), detach the strip RF from the dispensing support element 3 via the further nozzle arrangement 86 and the activated airflow S2 from the nozzles, and guide it over the transfer profile 80 encompassed in the deflection element 8. The operator must also control the strip RF towards the receiving support element 4 or the wire shear 26 associated with the receiving support element 4, which is located outside the web path, until the receiving support element 4 or the wire shear 26 located outside the web path has securely taken over the strip RF. Subsequently, the operator, who still holds both hands on the first control element 62, activates the transfer process in the machine control 90 by actuating the third control element 66, for example, with the thumb of one hand.This triggers the widening of the transferred strip RF and thus the transfer of the entire web width of the fiber web.

[0108] The operator can now deactivate the nozzle arrangements 84, 86 by pressing or releasing the second control element 64 again and move the transfer device to the parking position PO by performing a reverse operation.

[0109] The ergonomically designed operating device 60 with three integrated operating elements 62, 64, 66 enables efficient and safe manual transfer of the RF strip even in confined spaces within the machine 1.

[0110] Furthermore, the design ensures that the operator must keep both hands on the operating device 60 and therefore cannot and does not need to interact with the machine 1. Thus, the operator's safety is guaranteed under all circumstances.

[0111] Figures 2a to 2c show the second direction 42 or the rotational movement 42 of the operating device 60 encompassed in the transfer device 10 and the deflection element 8 directly connected via the control device 82.

[0112] Figure 2b shows the initial or center position of the deflection element 8. The deflection element 8 and the operating device 60 are set as shown without a preset angular offset relative to each other. In an alternative embodiment, an offset angle relative to each other can be provided for improved operator ergonomics.

[0113] Figure 2a shows the maximum deflection by a positive alignment angle +a with a +30° adjustment to the center position of the deflection element 8. Figure 2c shows the minimum deflection by a negative alignment angle -a with a -30° adjustment to the center position of the deflection element 8.

[0114] Figures 3a and 3b show the deflection element 8 according to the invention.

[0115] Figure 3a shows a schematic cross-section in the MD-z plane through the deflection element 8. The deflection element 8 comprises at least one transfer profile 80 extending straight in the direction of the support arm, or, in the illustrated embodiment, exactly one transfer profile 80. The transfer profile 80 extending straight in the direction of the support arm is shaped as an aerodynamic profile in the path direction MD, wherein, to determine the precise profile shape for the desired aerodynamic properties, the profile has a profile length L and a camber C with a corresponding camber recess CR, relative to the line connecting the leading edge LE and the trailing edge TE. The rotary rod 82 coming from the operating device 60 is also shown. The rotary rod 82 is designed as a pressure line and can be connected to a gaseous medium supply (not shown) or a compressed air supply.Furthermore, the rotary rod 82, in the area of ​​the deflection element 8, includes a nozzle arrangement 84 with several outlet openings or nozzles arranged in the CD direction. The nozzle arrangement 84, in its outflow direction S1 relative to an intersection point of the nozzle arrangement with the profile chord of the transfer profile 80, extending straight in the direction of the support arm, is oriented either away from the transfer profile or towards the strip RF at an angle +β of greater than 0° to less than or equal to 15°, or at an angle -β of less than 0° to greater than or equal to 5° towards the surface of the transfer profile 80 or away from the strip RF. By selecting the angle + / -β, it is possible to control the air cushion and the turbulence on which the strip RF slides over the transfer profile 80.

[0116] As shown in the top view of the deflection element 8 in Figure 3b, the deflection element 8 comprises a further nozzle arrangement 86 which enables an airflow in a second outflow direction S2. The arrangement includes a so-called "bullhorn" configuration, which comprises two openings or nozzles of the further nozzle arrangement 86 and the openings are directed towards the pickup point for the strip RF from the web-discharging support element 3. This arrangement is already known from the prior art cited in detail. The further nozzle arrangement 86 enables the strip RF to detach from the discharging support element 3 by blowing air underneath or behind the strip RF and directs the strip RF towards the nozzle arrangement 82 and the subsequent transfer profile 80.

[0117] Figures 4a and 4b show an exemplary arrangement of the transfer device 10 according to the invention in a machine 1 between a web-discharging support element 3 and a web-receiving support element 4. The sketched arrangement can be located within and / or between different machine sections of the machine 1. For example, a transfer can be located in the so-called "wet section" of the machine 1 within and / or between the forming section and the press section, between the press and dry sections, within a dry section, or at the end of a dry section.

[0118] This, applied to Figures 4a to 4b, means that the strip RF or the web F to be transferred has a moisture content of more than 45%, in particular more than 55%, preferably more than 65%, and can therefore already be used in the wet section.

[0119] Furthermore, the transfer device 10 can be arranged immediately after a forming section and the strip RF to be transferred can be taken from a forming section, which means that the web-discharging support element 3 can be a forming screen and the web-receiving support element 4 can be a press felt of a press section.

[0120] Furthermore, the transfer device 10 can be arranged directly after a press section and the strip RF to be transferred can be taken from a press section, which means that the web-discharging support element 3 can be a press felt and the web-receiving support element 4 can be, for example, a drying cylinder or a drying screen.

[0121] Furthermore, the transfer device 10 can be arranged within and / or immediately after a drying section and the strip RF to be transferred can be taken from a drying cylinder 3 of the drying section, which means that the web-discharging support element 3 can be a drying screen in addition to the drying cylinder and the web-receiving support element 4 can be a drying cylinder or a drying screen of another drying group or drying section.

[0122] Furthermore, the transfer device 10 can be arranged immediately after a drying section and the strip RF to be transferred can be taken from a last drying cylinder 3 of an area of ​​the drying section having only one row of drying cylinders, which means that the web-discharging support element 3 is a drying cylinder and the web-receiving support element 4 is arranged, for example, in a coating section or winding section.

[0123] Due to its compact design and the PO parking position, it can be used anywhere, preferably in confined spaces where a fully automated solution cannot be used due to space constraints and transport reliability.

[0124] The discharge support element 3 is further shown as a discharge roller with or without a covering, and the receiving support element 4 as a roller, cylinder, or drying cylinder. The receiving support element 4 can be designed with or without additional covering.

[0125] The transfer device 10 with transfer profile 80 is arranged directly near the surface of the dispensing support element 3 and downstream in the machine direction MD.

[0126] It is particularly advantageous if the transfer device 10 with transfer profile 80 is arranged in an angular position y1 of the dispensing roller 3 between 0° and 180°, preferably 30° and 120°, with respect to the dispensing support element 3.

[0127] It is particularly advantageous if the transfer device 10 with transfer profile 80 is arranged in an angular position y2 of the receiving roller 4 between 270° and 360°, preferably 290° and 340°, with respect to the receiving support element 4.

[0128] It is particularly advantageous if the transfer device 10 with transfer profile 80 is arranged in the angular position y1 with respect to the releasing support element 3 and the angular position y2 with respect to the receiving support element 4.

[0129] Figure 4a shows the transfer device 10 with transfer profile 80 in a functional position P2 in which the deflection element 8 is positioned by the operator for transfer, but the strip RF is still directed into a disposal device not shown on the dispensing support element 3.

[0130] Figure 4b shows the arrangement from Figure 4a in a subsequent operating position P3 or P4. The transfer of the strip RF is or is successfully carried out. For this purpose, the gaseous medium supply, for example with compressed air, to the nozzle arrangement 84 and the further nozzle arrangement 86 is activated by the operator by actuating the second control element 64.

[0131] The further nozzle arrangement 86 detaches the strip RF from the dispensing support element 3 by means of the outflowing compressed air in the outflow direction S2. At the same time, the nozzle arrangement 84, which is supplied with compressed air by the rotary rod 82, forms an air cushion optimized with respect to turbulence and flow resistance over the transfer profile 80 for guiding the strip RF over the transfer profile 80.

[0132] The operator uses the control device 60 to make minor corrections to the rotational movement 42, the rotary movement 44, and the linear movement 40, so that the strip RF is guided to the subsequent receiving support element 4. The strip RF is received by the receiving support element 4, and the strip RF is pulled, which tensions it against the strip RFII.

[0133] After the successful transfer of strip RF, it stretches between the supplying and receiving support elements 3, 4 to form strip RF II and the next step of the transfer process can be initiated by the operator.

[0134] For example, after the function position P3, a widening operation is activated in the higher-level machine control 90 by actuating the third operating element 66 on the operating device 60, whereby the tensioned strip RF II is widened to the fiber web F which is the width of the web in the transverse direction CD and is continued in the subsequent machine section.

[0135] Alternatively, in operating position P4, the strip RF is not transferred directly into the receiving support element 4, but into a rope guide 26 or rope shear, located outside the web path and formed at the beginning of a rope arrangement, which is associated with the web-receiving support element 4. Even after operating position P4, a widening process is activated in the higher-level machine control 90 by actuating the third operating element 66 on the operating device 60, whereby the strip RF II is widened to form the fiber web F, which is the same width as the web in the transverse direction CD, and is then continued in the subsequent machine section.

[0136] Figure 4c shows a possible further arrangement of the transfer device 10 with a deflection element 8 which is designed as a transfer profile with L-shape extension 81 in a machine 1.

[0137] The transfer device 10 with a transfer profile with L-shape extension 81 is arranged on the track-receiving support element 4 in an angular position y2 between 270° and 360°, preferably 290° and 340°.

[0138] Alternatively, in a version with a cable guide 26, arranged outside the track path and formed at the beginning of a cable arrangement and associated with the track-receiving support element 4, a further transfer device 10 with a transfer profile with an L-shape extension 81 can be provided. After successful transfer with the transfer device 10 with transfer profile 80, the operator moves it to parking position PO and positions the further transfer device 10 with a transfer profile with an L-shape extension 81 from its parking position PO in the machine 1. The deflection of the transferred strip RF II is then carried out via its functional positions P1 to P4.

[0139] The transfer device 10 with a transfer profile with L-shape extension 81 is arranged on the track-receiving support element 4 in an angular position y2 between 270° and 360°, preferably 290° and 340°.

[0140] By means of the transfer device 10 with a transfer profile with L-shape extension 81, the tensioned and transferred strip RF II is deflected in a further intermediate step via the functional positions P1 to P4 into the rope shear 26 against the transverse direction CD. Only then, by actuating the third operating element 66 on the operating device 60, is the further transfer device

[0141] 10 with a transfer profile with L-shape extension 81 in the higher-level machine control 90 a widening is activated, whereby the tensioned strip RF

[0142] 11 is widened to the fiber web F in the transverse direction CD and is continued in the following machine section.

[0143] The discharge support elements 3 shown in the figures can be, for example, a forming screen running over a deflection roller, a press felt, or a drying screen. The discharge support element 3 can also be a drying cylinder or a deflection roller.

[0144] The receiving support elements 4 shown in the figures can, for example, be a press felt running over a deflection roller, a drying screen, or two drying screens. The receiving support element 4 can also be a drying cylinder or a deflection roller. Figures 5a to 5c show the transfer device 10 with a deflection element 8, which is designed as a transfer profile with an L-shape and extension 81, in the functional positions P1 (Figure 5a), P2 (Figure 5b), and P4 (Figure 5c), each in a top view of an MD-CD plane from the z-direction and a side view of an MD-z plane opposite the CD direction, as well as in Figure 5a in a side view of an MD-z plane in the CD direction.

[0145] Figures 6a to 6c show in detail a possible embodiment of the deflection element 8 as a transfer profile with L-shape extension 81.

[0146] Figure 6a shows the transfer profile with L-shape extension 81 in a view in the machine running direction MD.

[0147] Figure 6b shows the transfer profile with L-shape extension 81 in a view in the transverse direction CD.

[0148] Figure 6c shows a section through the hollow profile of the L-shaped transfer profile with extension 81. The hollow profile is oriented against the machine direction MD, but due to its curved L-shape, it can be found in various positions CD, z in space.

[0149] Figures 7a to 7c show the further transfer device 10 with a deflection element 8 which is designed as a transfer profile with L-shape extension 81 in the functional positions P1 (Figure 7a), P2 (Figure 7b) and P4 (Figure 7c) each in a view on a CD-z plane opposite the MD direction and a side view on an MD-z plane opposite the CD direction.

[0150]

[0151] 1 machine

[0152] 6 frame

[0153] 8 Deflection element

[0154] 10 Transfer device

[0155] 21 Support arm

[0156] 26 Rope guidance

[0157] 34 Storage and guidance equipment

[0158] 40 First direction of movement, linear movement in CD

[0159] 42 Second direction of movement, rotational movement of the deflection element

[0160] 44 Third direction of movement, rotational movement from parking position

[0161] 46 Direction of operation of the third control element

[0162] 60 Operating device

[0163] 62 first control element

[0164] 64 second control element

[0165] 66 third control element

[0166] 68 Display device

[0167] 70 Stop element

[0168] 71 additional stop element

[0169] 80 Transfer profile with straight extension

[0170] 81 Transfer profile with L-shape extension

[0171] 82 Control device

[0172] 84 Nozzle arrangement

[0173] 86 additional nozzle arrangements

[0174] 88 long section of the transfer profile with L-shape extension

[0175] 89 short part of the transfer profile with L-shape extension

[0176] 90 Control and regulating device

[0177] 91 Rotary bearing of the transfer profile with L-shape extension on the support arm a Alignment angle of the deflection element ß Outflow angle from a nozzle arrangement

[0178] T Rotation angle of the bearing and guide device y Angular position relative to the center point of the support element

[0179] C profile curvature

[0180] CR Profile Curvature Backing D Profile Thickness

[0181] F Fibre web

[0182] L profile length

[0183] LE profile front edge (leading edge)

[0184] PO - P4 Functional positions RF strip

[0185] RF II transferred strip RF under tension between both support elements

[0186] 51 First outflow direction nozzle arrangement

[0187] 52 Second outflow direction nozzle arrangement

[0188] TE profile trailing edge (Trailing Edge)

[0189] MD Machine direction of travel

[0190] CD machine transverse direction z vertical direction

Claims

1. Transfer device (10) for transferring a strip (RF), preferably an edge strip (RF) or transfer strip (RF), within a machine for the production or treatment of the fibrous web (F), preferably paper, cardboard or tissue web, from a first to a further machine section, in particular from a web-discharging support element (3) to a web-receiving support element (4) or into a rope guide (26) formed at the beginning of a rope arrangement and associated with a web-receiving support element (4), arranged outside the web path, wherein the transfer device (10) • comprises a bearing and guiding device (34), wherein the bearing and guiding device (34) is connectable to a frame (6) of the machine and, • comprising a support arm (21 ) with a deflection element (8) and an operating device (60), wherein the deflection element (8) is arranged at the end of the support arm (21 ) projecting into the machine and the operating device (60) is arranged at the end of the support arm (21 ) projecting out of the machine and, • wherein the support arm (21 ) is guided in the bearing and guide device (34) such that the support arm (21 ) is movable in a first direction (40) and the deflection element (8) is positionable with a linear movement in the transverse direction (CD) of the machine and, • wherein the deflection element (8) is movable in a second direction (42) such that the deflection element (8) can be aligned with a rotational movement (42) in such a way that the strip (RF) is predominantly guided when passing through the deflection element (8), characterized in that the deflection element (8) is designed in the machine direction (MD) as at least one transfer profile (80, 81), preferably as a transfer profile (80) with a straight extension in the direction of the support arm or as a transition profile (81 ) with an L-shape extension in the direction of the support arm, and that the transition profile (80, 81 ) has a surface contour in the form of an aerodynamic wing profile oriented towards the strip (RF).

2. Transfer device (10) according to claim 1, characterized in that the deflection element (8) in the machine direction (MD) is a transfer profile (80) is designed with a straight extension in the direction of the support arm.

3. Transfer device (10) according to claim 1, characterized in that the deflection element (8) in the machine direction (MD) is a transfer profile (81 ) is designed with an L-shape extending in the direction of the support arm.

4. Transfer device (10) according to one of the preceding claims, characterized in that the transfer device (10) comprises a nozzle arrangement (84) in the area of ​​the transfer profile (80, 81) and that the nozzle arrangement (84) comprises at least one outlet opening for the outflow of a medium, preferably compressed air, in a first outflow direction (S1).

5. Transfer device (10) according to one of the preceding claims, characterized in that a further nozzle arrangement (86) is included in the area of ​​the transfer profile (80, 81) and that the further nozzle arrangement (86) comprises at least one outlet opening for the outflow of a medium, preferably compressed air, in a second outflow direction (S2).

6. Transfer device (10) according to one of the preceding claims, characterized in that a control device (82), preferably a rotary rod (82) or a push rod (82), is arranged within the support arm (21), which extends from the operating device (60) to the transfer profile (80, 81) and can be connected to both.

7. Transfer device (10) according to claim 6, characterized in that the control device (82) can be connected to a gaseous medium supply, in particular a compressed air supply, on the side facing the operating device (60), so that a nozzle arrangement (84) and / or a further nozzle arrangement (86) is supplied with a medium, preferably compressed air.

8. Transfer device (10) according to one of the preceding claims, characterized in that the bearing and guide device (34) can be rotatably mounted at a connection point with the frame (6), so that the transfer device (10) can be rotatably and positioned about the connection point with the frame (6) in a third direction (44) in a machine direction-transverse plane (MDCD), preferably rotatably and positionably in a rotation angle (T) of less than or equal to -90°, preferably from a 360° park position (PO) to a 270° operating position (P1 , P2, P3).

9. Transfer device (10) according to claim 2, characterized in that the transfer profile (80) has a straight extension in the second direction (42) at an orientation angle (a) less than or equal to + / -90°. 0 , especially + / -30 0 , can be aligned to the horizontal around an axis parallel to the transverse direction (CD) in the machine running direction (MD).

10. Transfer device (10) according to claim 6 or 7, characterized in that the control device (82), preferably rotary rod (82), extends over the entire width of the transfer profile (80, 81) in the direction of the support arm and that a nozzle arrangement (84) is integrated into the control device (82), preferably rotary rod (82), such that the control device (82) and the nozzle arrangement (84) are made from one component.

11. Transfer device (10) according to claim 4, characterized in that the nozzle arrangement (84) of the transfer profile (80) with a straight extension in the first outflow direction (S1) is aligned with an outflow angle (β) less than or equal to +15°, preferably less than or equal to +10°, and greater than 0°, or an outflow angle (β) less than 0° and greater than or equal to -5°, in particular the outflow angle (β) is referred to an imaginary surface tangent to the transfer profile (80) extending from the outflow opening in a machine direction-height plane (MD-z).

12. Machine for the production and / or treatment of a fibrous web with at least one transfer device (10) according to one of the preceding claims.

13. Machine according to claim 12, characterized in that a first transfer device (10) with a deflection element (8) is designed and arranged as a transfer profile (80) with a straight extension in the support arm direction after a path-discharging support element (3), and that In front of a track-receiving support element (4) a second transfer device (10) with a deflection element (8) is designed and arranged as a transfer profile (81) with an L-shape extension.

14. Method for transferring a strip (RF), preferably an edge strip (RF) or transfer strip (RF), within a machine for producing or treating the fibrous web (F), preferably paper, cardboard or tissue web, using a transfer device (10) according to claim 1, wherein a single operator a) moves the transfer device (10) from a park position (PO) to a first operating position (P1), and b) positions the transfer profile (80, 81) in a first direction (40) with a linear movement in the transverse direction (CD) of the machine to a second operating position (P2), and c) aligns the transfer profile (80, 81) in a second direction (42) with a rotational movement to receive the strip (RF) in a third operating position (P3), and d) activates a gaseous medium supply, preferably a compressed air supply, for removing and / or receiving the strip (RF).and e) performs a change in the orientation in the second direction (42) and / or a change in the third direction (44) of the transfer device (10) in the fourth operating position (P4) after activation of the gaseous medium supply, preferably compressed air supply, or f) performs a change in the position of the first direction (40) of the transfer device (10) in the fourth operating position (P4) after activation of the gaseous medium supply, preferably compressed air supply, until the strip (RF) is picked up by the transfer profile (80, 81) and moves to the web-receiving support element (4) or a web-receiving, Support element (4) assigned, arranged outside the track path, at The rope guide (26) formed at the beginning of a rope arrangement is transferred.

Images