Winding device for winding synthetic threads

Abstract

The invention relates to a winding device (1) for winding synthetic threads (F), comprising a machine carrier (2) for supporting a bobbin holder (20, 21) with a crossbeam (21) extending from the machine carrier (2) for supporting a traversing device (4) and a contact roller (6) for winding coils (10) onto the bobbin holder (20, 21), wherein a movable support frame (8) is arranged on the crossbeam (21) for moving the traversing device (4) and the contact roller (6), on which the traversing device (4) and the contact roller (6) are held tiltable (Φ), tiltable (θ) and yawable (Ψ) on the crossbeam (21), and an associated support frame for compensating for a load curve of the bobbin holder.

Description

[0001] The invention relates to a winding device for winding synthetic threads onto a bobbin holder and an associated support frame for compensating for a load curve of the bobbin holder.

[0002] When winding synthetic threads with a winding device, it is essential that a contact roller follows a load reduction of a winding spindle so that the winding spool can be wound correctly.

[0003] Several proposals for this are known from the general state of the art.

[0004] For example, EP4349753A2 discloses a yarn winder that winds a plurality of yarns around a plurality of spools to form a plurality of spools, wherein the yarn winder comprises: a spool holder arranged to extend in a predetermined direction and hold the plurality of spools side by side in the predetermined direction; wherein the yarn winder includes a contact roller arranged to extend at least in the predetermined direction and exert a contact pressure on the plurality of bundles, and an angle adjustment unit configured to adjust an angle of a traversing device and the contact roller with respect to the horizontal direction;and the yarn winder further comprises a support element that carries the traversing device and the contact roller and is configured to be movable by the angle adjustment unit, the motion drive unit being configured to move the support element at least in the specified direction.

[0005] The angle adjustment unit essentially allows for adjustment of the position of the contact roller and the traversing device, primarily in a horizontal direction. When the coils are wound onto the coil holder, the load on the coil holder increases, causing it to sag along its length. The angle adjustment unit can compensate for this load-induced sag essentially only in a predetermined direction.

[0006] Balancing and reducing the load on the coil holder during coil winding is essential for producing high-quality coils.

[0007] The angle adjustment unit cannot compensate for all directions of load reduction. Incorrect and / or incomplete consideration of all load reduction directions can lead to coils that do not meet the high quality standards required for coils.

[0008] The object of the invention is therefore to provide a winding device for winding synthetic threads, with which all directions of a load reduction of a bobbin holder can be compensated.

[0009] Furthermore, it is an object of the invention to provide a support frame for carrying a traversing device and a contact roller of a winding device, with which it is possible to compensate for the load reduction of a coil holder.

[0010] The problem is solved according to the invention with regard to the winding device by a winding device having the features according to claim 1.

[0011] According to one aspect of the invention, a winding device for winding synthetic threads is provided, comprising a machine carrier for carrying a spool holder with a crossbeam extending from the machine carrier for carrying a traversing device and a contact roller for winding coils onto the spool holder, wherein a movable support frame is arranged on the crossbeam for moving the traversing device and the contact roller, on which the traversing device and the contact roller are held tiltably, pivotably and yawably on the crossbeam.

[0012] "Wobbly" refers to a rotational movement or turning motion in the X-longitudinal direction, around the longitudinal axis in the horizontal direction of the winding device, at least section by section.

[0013] Nodding is understood to mean a rotational movement or rotary movement in the Y-lateral direction, around the transverse axis in the horizontal direction of the winding device, at least section by section.

[0014] Yawing is understood to mean a rotational movement or rotary movement in the Z-height direction, around the height axis in the vertical direction of the winding device, at least section by section.

[0015] The winding device according to the invention provides a support frame that allows independent movement of both the traversing device and the contact roller.

[0016] For this purpose, the support roller and the traversing device are mounted at predetermined points in the support frame, which allows suitable movement and adjustment of the respective components, so that both the contact roller and the traversing device can be moved independently of each other, without the traversing device restricting the movement of the contact roller and vice versa.

[0017] This allows for simple and precise guidance of the contact roller and alignment with the load curve of a coil holder.

[0018] A spool holder is attached to a spool holder turret in a cantilevered manner, so that when the spool holder is loaded, the free cantilever section of the spool holder, which is not held on the spool holder turret, lowers.

[0019] The change in position of the free cantilever section must be compensated for by the contact roller so that a clean and good formation of winding coils can take place on the coil holder.

[0020] With the winding device according to the invention, it is possible to compensate for the load curve of the coil holder, so that the contact roller can follow the load curve of the coil holder without restriction of the traversing device.

[0021] According to a preferred embodiment of the winding device, the support frame is rotatably coupled to the crossbeam of the machine carrier by means of a rotary joint and has a first support arm and a second support arm, wherein the contact roller is rotatably held at its first end section and at the first support arm and rotatably held at its second end section at the second support arm, wherein a first bearing point for supporting the traversing device is formed at the first end section and a second bearing point for supporting the traversing device is formed at the second end section.

[0022] The support frame has a first and a second support arm, which allow the respective end sections of the contact roller to be moved independently of each other.

[0023] To prevent the traversing device from interfering with this movement, the traversing device is mounted at predetermined bearing points on the respective end sections of the support arm.

[0024] The bearing can be loose and / or articulated. The essential point is that the traversing device is movable, but can be positioned and mounted in a fixed location on the support frame.

[0025] According to a further embodiment of the winding device, the first support arm is movable independently of the second support arm, and the first support arm has a first drive and the second support arm has a second drive.

[0026] In order to adapt the contact roller to the load curve of the coil holder, the support arms are independently movable and each support arm has its own drive, so that a corresponding regulation or control of the support arms to the load curve of the coil holder is possible.

[0027] The load curve can be predefined in a control system of the winding device, so that the support arms and their associated drive are controlled according to a predetermined programming.

[0028] Alternatively and / or additionally, a control system can be implemented in which a sensor, in particular a displacement sensor, is provided that detects the movement of the support arms and supplies the detected data to the control of the winding device, so that the drives or the support arms are deflected and controlled according to the detected data.

[0029] The drive mechanism can be, for example, pneumatically and / or hydraulically operated diaphragm cylinders, each responsible for loading and unloading the support arms, thus moving the support frame. Each drive unit can also be referred to as an unloading cylinder.

[0030] According to a preferred embodiment of the winding device, a stiffening strut is mounted between the first support arm and the second support arm, which has a third bearing point for supporting the traversing device.

[0031] The support arms are designed with a stiffening strut to allow precise control of the contact roller guided by them. Additionally, the stiffening strut has a third bearing point where the traversing device is movably mounted, so that its movements during coil travel and winding of the winding coil onto the coil holder do not interfere with the contact roller and the support arms coupled to it.

[0032] According to an additional embodiment of the winding device, the traversing device has a first traversing bearing at the first bearing point, a second traversing bearing at the second bearing point and / or a third traversing bearing at the third bearing point, each of which is designed as a floating bearing and / or as a spherical bearing.

[0033] A suitable bearing is provided at each bearing point of the traversing device. The bearing is designed in such a way that free movement of the traversing device is possible independently of the movements of the support arms, so that the traversing device can move or cross the threads for the winding spools back and forth, and at the same time the contact roller can follow the load curve of the spool holder.

[0034] Both processes can be carried out independently of each other, without either of them having a disruptive effect on the winding of the coils.

[0035] For this purpose, appropriate bearing points are provided on the traversing bearing and the associated support arm or stiffening strut.

[0036] According to a further embodiment of the winding device, the first / second drive of the first / second drive acts on a lever arm of the first / second support arm, wherein the lever arm extends essentially transversely to the first / second support arm.

[0037] The different designs of the support arm and the lever arm allow for a simple drive mechanism to adjust the position of the support arm. A joint connection and a lever-like arrangement enable simple and straightforward adjustment of the support arm. Furthermore, this design allows for simple and straightforward attachment of the support arms to the crossbeam.

[0038] According to a further embodiment of the winding device, the lever arm extends to an end section of the first / second support arm, the end section being arranged adjacent to a pivot joint of the support arm, by means of which the first / second support arm is movably mounted on the crossbeam.

[0039] The advantageous design of the lever arm adjacent to the pivot joint allows for load-free movement of the support arm, whereby the lever arm can be easily controlled via the associated drives without causing additional loads to the support frame.

[0040] According to a further embodiment of the winding device, a sensor, in particular a displacement sensor, is positioned adjacent to the rotary joint to detect the movement of the first / second support arm and / or a first / second displacement lock is arranged adjacent to the rotary joint to limit the range of motion of the first or second support arm.

[0041] Sensors can be provided at suitable positions to control the deflection of the support frame or the associated support arms.

[0042] Suitable position sensors can, for example, detect the movement of the support arm via a light signal and forward the detected data to the control of the winding device, so that the control of the winding device controls the support arms or the associated drives accordingly, so that the load curve of the coil holder can be balanced and the contact roller of the winding coils or the load curve of the coil holder can follow properly.

[0043] In addition, the movement of the support arms can be limited by appropriate path locks in the horizontal and / or vertical direction by means of blocking devices, so that in particular in the event of a failure of the drives of the support arms, the support arms do not fall uncontrolled.

[0044] The limited range of motion of the support arms is chosen to allow sufficient movement to compensate for the load curve of the coil holder.

[0045] The problem is solved according to the invention with regard to the support frame by a support frame having the features according to claim 9.

[0046] According to a further aspect of the invention, a support frame for carrying a traversing device and a contact roller of a winding device according to at least one of the preceding embodiments is provided, wherein the support frame is arranged on a crossbeam of the winding device in such a way that the support frame is tiltable, pivotable and / or rotatable relative to the crossbeam.

[0047] According to a design of the support frame, unrestricted movement of the support frame is possible, so that the support frame can follow a load curve of the coil holder without the associated components, such as the traversing device, hindering this.

[0048] According to one embodiment of the support frame, the support frame has a first support arm and a second support arm on which a contact roller is movably held and a traversing device is movably held, so that the contact roller can follow a load curve of a coil holder independently of the traversing device.

[0049] The support frame is designed so that the contact roller can follow the load curve of the coil holder without restricting the traversing device. The support frame simultaneously guides the contact roller and holds the traversing device.

[0050] The winding device according to the invention is explained in more detail below with reference to exemplary embodiments of the winding device according to the invention and the accompanying figures.

[0051] They represent: Fig. 1 schematically a perspective view of a first embodiment of a winding device according to the invention with a traversing device and a contact roller with an exaggerated representation of a deflection of a loaded chuck according to a load curve, Fig. 2 schematically a side view of the first embodiment of the winding device according to the invention Fig. 1, where the load curve of the coil holder is shown with a possible alignment line of the traversing device and the contact roller, Fig. 3 schematically a cross-sectional view of the first embodiment of the winding device according to the invention. Fig. 1, Fig. 4 schematically a perspective view of the first embodiment of Fig. 1. For a better and unobstructed view of a support frame of a traversing device without the traversing device itself, and Fig. 5 schematically a detailed view of a support arm of the support frame of the winding device according to the invention. Fig. 1.

[0052] At least in the Fig. 3 and Fig. Figure 4 shows a reference coordinate system that displays the XYZ axes and the associated θ-Φ-Ψ rotational movements.

[0053] In Fig. Figure 1 schematically shows a perspective view of a first embodiment of a winding device 1 according to the invention.

[0054] How Fig. As can be seen from Figure 1, the winding device 1 has a machine carrier 2, which in particular carries a spool holder turret 26. A first spool holder 20 and a second spool holder 21 are rotatably mounted on the spool holder turret 26. The first spool holder 20 and the second spool holder 21 can be moved into a winding position and into an unwinding position by means of the spool holder turret 26.

[0055] In Fig. Figure 1 shows the first spool holder 20 in a winding position and the second spool holder 21 in an off position. In the winding position, filaments F can be wound onto spools 9. In the off position, the wound spools 9 can be removed.

[0056] The first spool holder 20 is equipped with a plurality of winding spools 9 in the winding position in Fig. 1 shown. The second coil holder 21 is in Fig. 1 shown in the off position, without winding coils 9.

[0057] In the winding position, winding coils 9 can be formed, and in the off position, the wound winding coils 9 can be removed from the respective first or second coil holder 20, 21.

[0058] The position of the first and second spool holders 20, 21 can be changed by rotating the spool holder turret 26 with a turret drive not shown.

[0059] For rotating the spool holder 20 and the spool holder 21, a corresponding spool holder drive 201 is provided for the first spool holder and a corresponding second spool drive 202 for the second spool holder 21.

[0060] The first spool holder 20 and the second spool holder 21 each have their own first and second spool holder drive 201, 202, respectively, so that their rotational speed can be controlled or regulated independently of each other, so that in the winding position the first and second spool holder 20, 21 can be driven to wind filaments F onto paper tubes to form winding spools 9 and can be braked or slowed down accordingly when the first and second spool holder 20, 21 is moved into the off position.

[0061] A traversing device 4 and a contact roller 6 are preferably required for winding or forming the winding coils 9.

[0062] The traversing device 4 is designed for traversing or changing a plurality of filaments F, wherein each thread comprises a plurality of filaments F. The associated traversing devices of the traversing device 4 are not shown here. The traversing devices can, for example, have a plurality of finger thread guides, with each thread having its own traversing device assigned to it for each winding spool 9.

[0063] Winding bobbins 9 can be formed by moving the threads F back and forth or changing them and simultaneously rotating the first or second bobbin holder 20, 21.

[0064] A contact roller 6 can be used to improve the alignment of the filaments F with the surface of the winding spool 9. The winding degree of the winding spool 9 can also be measured using the contact roller 6, whereby the rotational speed of the contact roller 6 can be measured and the winding degree of the winding spool 9 determined.

[0065] The contact roller 6 can also be used to detect the degree of winding of the winding coil 9. For example, the diameter of the winding coil 9 can be determined by observing the rotation of the contact roller 6 on the surface of the winding coil 9.

[0066] As from Fig. As can be seen in Figure 1, a crossbeam 23 is formed on the machine frame 2. The crossbeam 23 supports the support frame 8. The support frame 8 is coupled to the crossbeam 23 in such a way that movement of the support frame 8 and the contact roller 6 attached to the support frame 8 is possible in all XYZ directions in three dimensions.

[0067] Additionally, the support frame 8 carries the traversing device 4. The traversing device 4 is coupled to the support frame 8 in such a way that the traversing device 4 can move independently of the position of the contact roller 6. The support frame 8 is designed such that movement of the contact roller 6 is possible without the traversing device 4 being able to impede the movement of the contact roller 6.

[0068] The support frame 8 has a first and a second drive 801, 802 for moving the support frame 8, which is provided on the crossbeam 23.

[0069] Additionally, a reference coordinate system with XYZ coordinates and the associated Φ-θ-Ψ angle and rotation coordinates is specified. The rotational movement relative to the corresponding axis is indicated along the XYZ direction by Φ in the X direction, θ in the Y direction, and Ψ in the Z direction.

[0070] The support frame 8 allows for adjustment and change of position in the respective Φ-θ-Ψ rotational movements and XYZ axis directions, as specified with the reference coordinate system.

[0071] Fig. Figure 2 shows the winding device 1 in a side view in the X direction.

[0072] The load curve BK of the first coil holder 20 is shown here on an exaggerated scale. To ensure that the winding coils 9 are subjected to uniform stress by the contact roller 6, the contact roller 6 must be guided along an alignment curve AL corresponding to the load curve BK.

[0073] The load curve BK arises because the loaded first or second coil holder 20, 21 has to compensate for a greater load due to the winding coils 9, whose quantity and diameter increase during the coil journey, and lowers itself at a free cantilever section 27 in the opposite direction to a clamping section 28.

[0074] The freely projecting cantilever section 27 of the spool holder 20, 21 lowers more than the clamping section 28 which is rotatably mounted on the spool holder turret 26.

[0075] Essentially, a deflection around a load angle α can be observed. With the support frame 8 according to the invention, it is possible to adapt the contact roller 8 to the load curve BK. Here, the contact roller 6 is moved essentially parallel to the load curve BK according to the alignment line AL, as shown in Fig. 2 displayed.

[0076] Additionally, in Fig. 2 the course of the first and second center of gravity axes M1 and M2 of the first and second coil holders 20, 21 is shown.

[0077] The load curve BK of the first coil holder 21, loaded with the winding coils 9, and the equalization curve AL are exaggerated. The equalization curve AL can be assumed by the contact roller 6 by means of the support frame 8.

[0078] Fig. Figure 3 schematically shows a cross-sectional view of the winding device 1 in the Y direction.

[0079] Out of Fig. 3 The arrangement of the first coil holder 20 in the winding position and the second coil holder 21 in the off position can be recorded.

[0080] The first spool holder 20 and second spool holder 21 can be moved into the respective winding or off position by means of the spool holder turret 26.

[0081] Additionally, from Fig. 2 and Fig. It can be seen from Figure 3 that the support frame 8 has a first support arm 80 and a second support arm 81, each of which is movably mounted on the crossbeam 28 by means of a swivel arm 25 with a swivel joint 24.

[0082] The first support arm 80 is adjustable by means of a first drive 801 and the second support arm 81 is adjustable by means of a second drive 802.

[0083] Furthermore, the thread direction F is in Fig. Figure 3 indicates a guide for the filament pack F from a melt spinning device (not shown) to the winding device 1.

[0084] In Fig. Figure 4 is a schematic perspective view of the embodiment of Fig. 1 shown without the traversing device 4.

[0085] By omitting the traversing device 4, a better view of the support frame 8 is possible.

[0086] As in Fig. As shown in Figure 4, the support frame 8 has the first support arm 80 and the second support arm 81. The first support arm 80 and the second support arm 81 can be adjusted independently of each other by means of the first drive 801 and the second drive 802.

[0087] For this purpose, the first support arm 80 and the second support arm 81 are attached to the crossbeam 23 above the pivot arm 25 on both sides. Additionally, the support frame 8 has a stiffening strut 84 which couples the first support arm 80 and the second support arm 81 to each other adjacent to the pivot arm 25.

[0088] Approximately in the middle of the stiffening strut 84 a third bearing point 12 is formed, which interacts with a third traversing bearing 42 (not shown) that is formed on the traversing device 4.

[0089] In addition, a first bearing point 10 and a second bearing point 11 are provided on the end section of the support arm 80, which is adjacent to the contact roller 6, for supporting and storing a first traversing bearing 40 and a second traversing bearing 41 of the traversing device 4.

[0090] The first, second and third bearing points 10, 11, 12 can be articulated and / or rotatable, so that the traversing device 4 is positioned movably but sufficiently firmly on the support frame 8 to ensure winding of the winding coils 9.

[0091] Fig. Figure 5 schematically shows a detailed view of the first support arm 80 of the support frame 8.

[0092] As from Fig. As can be seen in Figure 5, the first support arm 80 has a drive 801. The drive 801 acts on a lever arm 3 of the first support arm. The lever arm 3 is integrally connected to the support arm 80, so that the drive force generated by the drive 801 can be easily transmitted to the support arm 80 for adjusting the contact roller 6.

[0093] The contact roller 6 is attached to the support arm 80 at its first end section 60.

[0094] Additionally, the contact roller 6 is rotatably positioned at its other second end section 61 on the second support arm 81. The second support arm 81 has the second drive 802. The drive forces of the second drive 802 are transmitted to the second support arm 81 via the same design as the first support arm 80.

[0095] Adjacent to the contact roller 6, the first bearing point 10 is provided on the first support arm 80 and the second bearing point 11 on the second support arm 81 for the articulated mounting of the traversing device 4. Corresponding first, second and third traversing bearings 40, 41 and 42 are provided on the traversing device 4.

[0096] To enable the position of the first and second support arms 80, 81 to be controlled or regulated, a motion sensor 30 is preferably provided on the crossbeam 23. Fig. 5 The position sensor 30 is in contact with the lever arm 3, so that a movement generated by the drive 801 or 802 can be immediately communicated to the control of the winding device 1. A motion sensor 30 can also be provided on the second support arm 81.

[0097] To restrict and block the range of motion of the first and second support arms 80, 81, first and second path locks 30, 31 and 32 are provided above and below the pivot arm 25 of the first and second support arms 80, 81.

[0098] The in Fig. The first drive 801 shown in Figure 5 has a cylinder 34 and a piston 33, which can control or regulate the position of the first support arm, for example, via compressed air. The piston 33 is articulated to the lever arm 3 by means of a piston coupling 35.

[0099] The second drive 802 also has a cylinder 34 and a piston 33, which acts with a piston coupling 35 on the lever arm 3 of the second support arm 81.

[0100] Both drives 801 and 802 can be independently pneumatically and / or hydraulically controlled or regulated. Drives 801 and 802 can also have an electric drive, either additionally or exclusively. Reference symbol list: 1 winding device 2 machine carriers 20 first spool holder 21 second spool holder 23 crossbeams 24 Swivel joint 25 Swivel arm 26 spool holder turret 27 Cantilever section 28 Clamping section 201 first spool holder drive 202 second spool holder drive 3 Lever arm 30 Distance sensor 31 first road closure 32 second road closure 33 pistons 34 cylinders 35 piston clutch 4 Traversing device 40 first traversing bearing 41 second traversing bearing 42 third traversing bearing 6 contact rollers 60 first final section 61 second final section 8 Support frame 80 first support arm 81 second support arm 84 stiffening strut 801 first drive 802 second drive 9 winding spool 10 first storage site 11 second storage site 12 third storage site F Thread direction M1 first center of gravity axis M2 second center of gravity axis BK load curve AL alignment line α loading angle QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 4349753A2

[0004]

Claims

[1] Winding device (1) for winding synthetic threads (F), comprising a machine carrier (2) for supporting a bobbin holder (20, 21) with a crossbeam (23) extending from the machine carrier (2) for supporting a traversing device (4) and a contact roller (6) for winding coils (10) onto the bobbin holder (20, 21), wherein a movable support frame (8) is arranged on the crossbeam (23) for moving the traversing device (4) and the contact roller (6), on which the traversing device (4) and the contact roller (6) are held tiltable (Φ), tiltable (θ) and yawable (Ψ) on the crossbeam (21). [2] Winding device (1) according to claim 1, characterized by, that the support frame (8) is rotatably coupled to the crossbeam (23) of the machine carrier (2) by means of a swivel joint (25) and has a first support arm (80) and a second support arm (81), wherein the contact roller (6) is rotatably held at its first end section (60) on the first support arm (80) and rotatably held at its second end section (61) on the second support arm (81), wherein a first bearing point (10) for supporting the traversing device (4) is formed at the first end section (60) and a second bearing point (11) for supporting the traversing device (4) is formed at the second end section. [3] Winding device (1) according to at least one of the preceding claims 1 or 2, characterized by , that the first support arm (80) is movable independently of the second support arm (81), and that the first support arm (80) has a first drive (801) and the second support arm (81) has a second drive (802). [4] Winding device (1) according to at least one of the preceding claims, characterized by , that a stiffening strut (84) is mounted between the first support arm (80) and the second support arm (81), which has a third bearing point (12) for supporting the traversing device (4). [5] Winding device (1) according to at least one of the preceding claims, characterized by , that the traversing device (4) has a first traversing bearing (40) at the first bearing point (10), a third traversing bearing (41) at the second bearing point (11) and / or a third traversing bearing (42) at the third bearing point (12), each of which is designed as a floating bearing and / or as a spherical bearing. [6] Winding device (1) according to at least one of the preceding claims, characterized by, that the first / second drive (801, 802) of the first / second support arm (80, 81) acts on a lever arm (3) of the first / second support arm, wherein the lever arm (3) extends substantially transversely to the first / second support arm (80, 81). [7] Winding device (1) according to at least one of the preceding claims, characterized by , that the lever arm (3) extends at each end section of the first / second support arm (80, 81), the end section being located adjacent to a pivot joint (24) of the support arm (80), by means of which the first / second support arm (80, 81) is movably mounted on the crossbeam (23). [8] Winding device (1) according to claim 7, characterized by, that a sensor, in particular a displacement sensor (30), is positioned adjacent to the pivot joint (24) to detect the movement of the first / second support arm (80, 81) and / or a first / second displacement lock (31, 32) is arranged adjacent to the pivot joint (24) to limit the range of motion of the first or second support arm (80, 81). [9] Support frame (8) for supporting a traversing device and a contact roller of a winding device according to at least one of the preceding claims 1 to 8, characterized by , that the support frame (8) is arranged on a crossbeam (23) of the winding device (1) such that the support frame (8) is tiltable, pivotable and / or rotatable relative to the crossbeam (23). [10] Support frame (8) according to claim 9, characterized by, that the support frame (8) has a first support arm (80) and a second support arm (81) on which a contact roller (6) is movably held and a traversing device (4) is movably mounted, so that the contact roller (6) can follow a load curve (BK) of a coil holder (20,21) independently of the traversing device (4).

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