Device for providing a coil-shaped cushioning product for packaging purposes

Abstract

Device (10) for providing a coil-shaped cushioning product (11) for packaging purposes, comprising a supply device (12) for providing a strand-like cushioning material (14) and a winding device (16) which winds the strand-like cushioning material (14) into the coil-shaped cushioning product (11), wherein a guide device (20) is arranged between the supply device (12) and the winding device (16), which guides the cushioning material (14) from the supply device (12) in a feed direction (22) to the winding device (16), characterized in that the guide device (20) comprises a guide carriage (32) for laterally guiding the cushioning material (14), and that the guide carriage (32) is movable by means of a drive device (70) at least approximately parallel to the feed direction (22).

Description

[0001] The invention relates to a device for providing a coil-shaped cushioning product for packaging purposes according to the preamble of claim 1.

[0002] It is generally known to transform a web-like starting material, such as paper, into a strand-like cushioning material by mechanical crumpling. It is also known to wind this crumpled strand-like cushioning material into a coil-shaped or spiral cushioning product. This coil-shaped cushioning product has the ability to support even heavy objects. To produce the coil-shaped cushioning product, the strand-like cushioning material is typically wound or coiled onto a rotating reel, which is then removed after winding. Examples of this are given in EP 1 027 214 B1 and DE 10 2021 110 643 A1.

[0003] DE 199 40 665 A1 shows a roll winding device with a support roller that can be placed on a winding roll arrangement for winding material webs.

[0004] DE 20 2014 101 081 U1 describes a winding device for winding a rubberized cord web with a parallel guided intermediate layer web onto a material spool.

[0005] Another winding device for bandages is known from DE 10 2006 046 955 A1. This winding device allows various bandages of different widths and qualities to be wound up using a manual or electric drive. Another such device is shown in DE 203 00 323 U1.

[0006] The object of the present invention is to create a device of the type mentioned above which works reliably and simply and with which it is possible to produce a densely packed coil-shaped cushioning product.

[0007] The problem is solved by a device having the features of claim 1. Advantageous embodiments of the invention are specified in the dependent claims. Furthermore, essential features of the invention are described below and shown in the accompanying drawing.

[0008] An advantage of the device according to the invention is that individual layers of the coil-shaped cushioning product lie on top of each other with high positional accuracy when the strand-like cushioning material is wound up. This can be achieved with the guide carriage of the guide device with minimal design effort.

[0009] The guide carriage guides the strand-like cushioning material between the dispensing device and the winding device in a feeding direction, thus along a predetermined or definable path, at least laterally. In particular, the cushioning material can also be guided transversely to the lateral guide and at least partially parallel to the guide carriage. Additionally, it is possible for the cushioning material to be guided vertically in the area of ​​the guide carriage, for example, by preventing or at least limiting upward escape via a crossbeam or an upper connecting section. The cushioning material is then "transferred" from the guide device to the winding device in a definable position.The mobility of the guide carriage, at least approximately parallel to the feed direction, ensures that the upholstery material is wound onto the winding device at the same, and preferably the smallest possible, distance to the winding device and / or at the same winding angle, even as the diameter of the upholstery product increases. The winding process can be carried out repeatedly with consistent quality, resulting in less waste, more dimensionally accurate upholstery products, and cost savings. Furthermore, the distance of the guide carriage to the winding device and the winding angle can accommodate different upholstery materials or requirements, such as the diameter or winding density of the upholstery products.

[0010] Specifically, this is achieved by a device for providing a coil-shaped cushioning product for packaging purposes, which initially comprises a dispensing device for providing a three-dimensional, strand-like cushioning material. This can be, for example, either a dispenser that retrieves and provides a strand-like cushioning material from a storage area, or, for example, the outlet of a device that produces the strand-like cushioning material from a flat, web-like starting material, such as a flat paper web or a plastic tube, by forming it, for example by crumpling or inflating it.

[0011] Furthermore, the device according to the invention comprises a winding device which winds the strand-like cushioning material into a coil-shaped cushioning product. A guide device is arranged between the supply device and the winding device, which guides the cushioning material at least partially from the supply device in a feed direction to the winding device. The guide device comprises a guide carriage for the lateral guidance of the cushioning material. In particular, the cushioning material can also be guided transversely to the lateral guide and at least partially parallel to the guide carriage. Additionally, it is possible for the cushioning material to also be guided vertically in the area of ​​the guide carriage, for example by preventing or at least limiting upward escape by means of a crossbeam or an upper connecting section.

[0012] The guide carriage can have two lateral, essentially parallel, and opposing side guide sections, for example, plate-like, which are connected to each other via at least one connecting section. If, for example, an upper connecting section is provided, then this, together with the side guide sections, forms a guide opening through which the strand-like cushioning material can pass in the feed direction. The upper connecting section can guide the cushioning material transversely to the lateral guide and at least partially parallel to the guide carriage. The cushioning material is thus guided between the side guide sections and the upper connecting section on the guide carriage in the feed direction.The side guide section can be rectangular, triangular, or trapezoidal, for example, while the connecting section can be rod-shaped or plate-shaped. The guide carriage can be made of metal or plastic.

[0013] Furthermore, the guide carriage can be moved more or less parallel to the feed direction of the upholstery material by means of a drive device. The guide carriage is preferably linearly movable. This allows the guide carriage to be located closer to the winding device during the winding process when the upholstery product has a first diameter than when it has a second diameter. The first diameter is smaller than the second diameter.

[0014] In a further development, it is stipulated that the guide device includes a guide section extending between the winding device and the supply device, on which the guide carriage is slidably mounted. The guide carriage can be moved along the guide section towards and away from the winding device, or vice versa. This allows for a structurally simple implementation of the guide carriage's movement, for example, using a conventional linear guide. The guide section can be flat on at least one side to accommodate the sliding guide carriage, for example, as a bent sheet metal part. It is also conceivable that the guide section could be plate-shaped, or at least partially plate-shaped.Preferably, the guide section is designed as an essentially straight part, similar to a straight beam, so that the guide carriage is guided along a straight path. However, it is also conceivable that the guide section is curved, so that the guide carriage is guided along a curved path.

[0015] In a further development, it is provided that the guide section can pivot about a pivot axis that is spaced apart from the winding device and essentially parallel to a winding axis. This allows the end section of the guide section facing the winding device to be positioned closer to the winding axis for the first, smaller diameter of the upholstery product mentioned above than for the second, larger diameter. Thus, the end section of the guide section facing the winding device can be pivoted away from the winding device, and in particular from the winding axis, as the diameter of the upholstery product increases.

[0016] By superimposing the pivoting movement of the guide section and the sliding movement of the guide carriage along the guide section, the feeding direction can be adapted to the increasing diameter of the upholstery product. This ensures a uniform, precise, and laterally guided winding of the upholstery material. The upholstery material can thus always be fed approximately tangentially to the continuously growing upholstery product's current outer circumference. The winding angle of the upholstery material can also be kept constant during winding or between winding operations, or adjusted for different upholstery materials. Overall, the winding precision is improved, and unwanted creasing and misalignment during winding of the upholstery material can be avoided.It is also conceivable that the swivel angle of the guide section, and thus the rolling angle, could be varied in a controlled or regulated manner during a rolling process in order to specifically influence the cushioning properties. For example, the guide section could be designed to swivel via a motorized drive device.

[0017] In a further development, it is provided that an end section of the guide facing the winding device is pre-tensioned towards the winding axis by a pre-tensioning device. This allows the guide section to be pushed away from the winding axis in one direction, and thus pivoted, around its pivot axis in the opposite direction to the pre-tension, due to the increasing diameter of the cushioning product, and thus pivoted, as the diameter increases.

[0018] Further training stipulates that the pretensioning device must include at least a coil spring, a disc spring, a gas spring, or a motorized drive. These are simple and cost-effective ways to pretension the end of the guide section facing the winding mechanism towards the winding axis.

[0019] During further training, it is stipulated that the drive unit which moves the guide slots includes at least one drive belt. This is simple and robust.

[0020] Further development stipulates that the guide section must have at least one elongated opening for guiding the guide carriage and / or that the guide section must have a lateral guide track for guiding the guide carriage. Both measures, individually or in combination, ensure that the movement of the guide carriage along the guide section is reliably and robustly defined.

[0021] In a further development, the device includes a control unit that operates the drive unit based on the diameter of the coil-shaped upholstery product. Consequently, the diameter of the upholstery product is known, at least approximately, at all times, allowing the control unit to move the guide carriage accordingly towards or away from the winding device. Manual intervention by a user is not required, and the automation of the guide carriage movement makes the winding process more reliable. The diameter of the upholstery product can be determined, for example, from known dimensions of a strand-like upholstery material and a known winding speed. A dedicated sensor to detect the current diameter of the upholstery product is then not strictly necessary. The device can additionally include a computing unit for this purpose.

[0022] In a further development, it is envisaged that the control unit can calculate the current diameter and / or the device includes a sensor, in particular a camera, which detects the current diameter of the upholstery product and provides a corresponding signal to the control unit. The control unit can, for example, calculate the diameter of the upholstery product as described above. In this case, a separate computing unit is not strictly necessary. Additionally or alternatively, the diameter of the upholstery product can be detected using the sensors, particularly in real time.

[0023] For example, even with strand-like upholstery materials that have uneven thickness and structure due to prior crumpling, the diameter of the coil-shaped upholstery product can still be precisely measured. The guide carriage can then be positioned exactly and as desired by the control unit. Additional sensors could include contact sensors, light barriers, acceleration sensors, and / or rotational speed sensors.

[0024] In a further development, the winding device is provided with a winding fork that is rotatable around the winding axis and functions as a reel. The winding fork can have two essentially parallel, elongated winding sections, which can be diametrically opposed and radially spaced from the winding axis. One end of the strand-like cushioning material can be inserted between the winding sections of the winding fork. When the winding fork is rotated around the winding axis, the cushioning material is wound onto the winding sections of the fork. The winding speed can be adjusted, for example, via the control device.By controlling the distance of the guide carriage to the winding device, the winding angle and the winding speed (rotation of the winding fork), the winding parameters for forming the cushioning product can be controlled and specifically influenced.

[0025] One embodiment of the invention is explained below with reference to the drawings. The drawings show: Fig. 1. A perspective view of a device for providing a coil-shaped upholstery product from an oblique top view; Fig. 2 a detailed view of a guide slide of the device Fig. 1; Fig. 2a an isolated drawn element from Fig. 2; Fig. 3 a schematic side view of the device Fig. 1 at the beginning of a winding process; Fig. 4 a schematic side view of the device Fig. 1 during the winding process; and Fig. 5 a schematic side view of the device Fig. 1 at the end of a winding process.

[0026] Subsequently, functionally equivalent elements and areas in different figures and embodiments bear the same reference numerals. They are normally only described in detail upon their first mention. Furthermore, for the sake of simplicity, not all reference numerals are shown in all figures.

[0027] In Fig. Figure 1 shows a device 10 for providing a coil-shaped cushioning product 11 for packaging purposes. The device 10 comprises a dispensing device 12 for providing a strand-like cushioning material 14, a winding device 16 which winds the strand-like cushioning material 14 into the coil-shaped cushioning product 11, and a guiding device 20. The guiding device 20 is arranged between the dispensing device 12 and the winding device 16 and guides the cushioning material 14 from the dispensing device 12 in a feed direction 22 to the winding device 16.

[0028] The supply device 12 can, for example, be a forming device that produces the strand-like cushioning material 14 from a flat, planar, and thus web-shaped paper strip 24 by forming, for example, by crumpling and / or folding or folding. In contrast to this flat, planar paper strip 24, the strand-like cushioning material 14 has a three-dimensional structure. In an embodiment not shown, the starting material is not a paper strip, but a plastic tube with individual inflatable air chambers. In this case, the forming into the strip-like cushioning material is carried out by inflating the air chambers, preferably with air.

[0029] The dispensing device 12 has a complexly shaped housing 26 with an unspecified input section (without reference numeral) for specifying, for example, the dimensions of an upholstery product to be manufactured. The input section is shown here as an example designed as a touchpad. Furthermore, in Fig. 1. A dispensing opening 28, shown here as an example essentially H-shaped, is provided on a side of the housing 26 that points obliquely forward. In embodiments not shown, the dispensing opening can also be rectangular, round, or oval. The dispensing opening 28 faces the guide device 20. During operation, the strand-like cushioning material 14 provided by the dispensing device 12 can be dispensed from the dispensing opening 28 in the feed direction 22.

[0030] The guide device 20, which in the feed direction 22 connects to the supply device 12 in the present example, comprises a guide section 30, in the present example designed as an essentially and overall straight beam, and a guide carriage 32 slidably mounted thereon, as shown in Fig. Figure 1 shows the guide device. However, the guide device does not necessarily have to connect directly to the supply device. In an embodiment not shown, it is spaced apart from the supply device. Furthermore, in an embodiment not shown, the guide section may not be entirely straight, but curved.

[0031] The command section 30 is in Fig. 1 is exemplified as a bent sheet metal part which, viewed from the front (here from the perspective of the winding device 16), has an L-shaped profile or an L-shaped cross-section. The L-shaped guide section 30 extends longitudinally between the winding device 16 and the supply device 12 (corresponding to a longitudinal extent 34 of the guide section 30) and has an upwardly facing flat upper wall, which forms a planar mounting section 36, and has a Fig. 1. A side wall facing the viewer forms a side section 38, which adjoins the mounting section 36 or is formed onto it by bending. The width of the mounting section 36, oriented transversely to the longitudinal extent 34, is greater than the height of the side section 38.

[0032] As in Fig. As shown in Figure 1, the guide carriage 32 is mounted on the assembly section 36 from above. To guide the guide carriage 32, the assembly section 36 has an elongated opening 42 laterally, close to the side section 38, in the longitudinal direction 34. The elongated opening 42 extends parallel to the longitudinal extent 34 of the guide section 30. Furthermore, a guide track 44 is arranged in a region of the assembly section 36 located away from the side section 38 to guide the guide carriage 32. The guide carriage 32 is laterally guided by the elongated opening 42 and the guide track 44, for example, by a linear bearing located within the guide track 44, which is not visible in the figures and extends parallel to the illustrated feed direction 22. Several linear bearings can also be arranged in the guide track 44.This allows the guide carriage 32 to be moved back and forth along the longitudinal extent 34 of the guide section 30 in a straight direction of movement 46 at the assembly section 36. As will be shown in more detail below, the guide carriage is moved in this example by a geared motor with belt drive.

[0033] The guide section 30 of the guide device 20 is pivotable about a pivot axis 50 that is spaced apart from the winding device 16, adjacent to the supply device 12, and substantially parallel to a winding axis 48 of the winding device 16. Thus, an end region 52 of the guide section 30 facing or adjacent to the winding device 16 is pivoted away from the winding axis 48. Fig. 1. The guide section 30 can be pivoted downwards in a pivot direction 54 (and also pivoted back towards the winding axis 48). The end region 52 of the guide section 30 facing the winding device 16 is pre-tensioned towards the winding axis 48 by a pre-tensioning device 56 (see Figure 1). Fig. 3-5). The preloading device 56 is in this case a gas spring (hereinafter also designated by reference numeral 56), but could also be a coil spring or a disc spring. In order to enable the pivoting movement of the guide section 30 against the preload, the gas spring 56 is pivotally attached to the guide section 30 and at its other end to another section (only schematically indicated) of the device 10.

[0034] The guide carriage 32 is in Fig. 2 is shown in detail and is described in more detail below. The guide carriage 32 comprises two lateral, essentially parallel and opposing side guide sections 58. The side guide sections 58 are congruent with each other and, in the illustrated embodiment, are plate-like and trapezoidal. The first lower longitudinal edges 60 of the side guide sections 58 are directly adjacent to the mounting section 36 in the assembled state. Slanted upper longitudinal edges 62 point away from the mounting section 36. Fig. 1 is a front end of the guide carriage 32 with short side edges (without reference numerals) facing the trapezoidal side guide sections 58 of the winding device 16, and a rear end of the guide carriage 32 with longer side edges (without reference numerals) facing away from the winding device 16 or towards the supply device 12. The side edges are approximately orthogonal to the plane of the assembly section 36.

[0035] The side guide sections 58 are connected to each other via two connecting sections 64, 66 at the rear end facing the staging device 12 and viewed in the feed direction 22. The upper connecting section 64 is rod-shaped and connects the corner areas of the side guide sections 58 between their respective upper longitudinal edge 62 and their respective longer side edge. The lower connecting section 66 is an L-shaped plate 67 in plan view, corresponding to Fig. 2a. The L-shaped connecting section 66 connects the lower longitudinal edges 60 of the side guide sections 58 to each other.

[0036] For the sliding guidance of the guide carriage 32 in the assembled state, the lower connecting section 66 has a feature on its Fig. 2a On the right longitudinal edge of the L-shaped plate 67, in the region of its end facing the viewer, a first tab-like engagement section 68 is located. The first engagement section 68 initially projects downwards from the right longitudinal edge of the L-shaped plate 67 of the connecting section 66 and then extends parallel to the L-shaped plate 67. In the assembled state, the first engagement section 68 engages in the elongated opening 42 on the guide section 30. Furthermore, the connecting section 66 has at its Fig. 2a On the left longitudinal edge, in the area closer to the viewer, a second tab-like engagement section 69 is formed. The second engagement section 69 projects in the Fig. 2a extends upwards from the L-shaped plate 67 of the connecting section 66 and then parallel to the L-shaped plate 67. In the assembled state, the second engagement section 69 engages in the guide track 44 and is supported in the at least one (not shown) linear bearing. It is conceivable that several such engagement sections could be provided for each side guide section to improve the guidance of the guide carriage.

[0037] The guide carriage 32 is driven by a drive unit 70 (see Fig. 3) movable back and forth in the direction of movement 46. In this embodiment, the drive unit 70 can comprise at least the aforementioned geared motor with belt drive, wherein a drive belt of the belt drive is arranged below the mounting section 36 (therefore not visible), as is the geared motor driving the drive belt (also not visible). The drive belt is coupled to the first engagement section 68. In this embodiment, the drive unit 70 is connected to a control unit 72. The control unit 72 is configured to control at least the movement of the guide carriage 70.

[0038] The winding device 16 has a winding fork 74 in the form of a reel, which is rotatable about the winding axis 48 in a winding direction 76. The winding fork 74 has two elongated, tine-like winding sections 78, which are rod-shaped and essentially parallel to the winding axis 48. The winding sections 78 are diametrically opposed to each other such that they are arranged on both sides of the winding axis 48 and radially spaced from it. They are also rigidly arranged at one end on a rotating section 80, which is located in the Fig. In the embodiment shown in Figure 1, the rotating section 80 is designed as a circular disc. The rotating section 80 is rotatably arranged on the winding device 16 about the winding axis 48 and can be driven by an additional drive unit (not shown here). The strand-like cushioning material 14 is wound onto the winding fork 74 to form the coil-shaped cushioning product 11 with a predetermined or predetermined diameter 82 (also labeled 82a, 82b at different times) (see Figure 1). Fig. 3 to 4).

[0039] In the Fig. Figures 3 to 4 schematically depict the device 10 at two different points in time during a winding process. Fig. Figure 3 shows the device 10 in a side view at the beginning or in the middle of the winding process.

[0040] At the start of the winding process, the strand-like cushioning material 14 emerges from the dispensing opening 28 of the supply device 12 with its front end (as viewed in the feed direction 22). This front end is guided through the opening in the guide carriage 32 formed between the two side guide sections 58 and the two connecting sections 64 and 66. Due to the gas spring 56, the guide section 30 is pivoted upwards at its maximum angle, so that the end section 52 is located near the two winding sections 78. The guide section 30 is also positioned close to the end section 52. In this way, the front end of the strand-like cushioning material 14 can be precisely positioned between the two winding sections 78.

[0041] This condition is approximately in Fig. Figure 3 shows the guide section 30 with its end area 52 being shown more strongly pivoted away from the rolling axis 48 than is actually the case, for the sake of clarity.

[0042] The winding device 16 is now driven in the winding direction 76, and simultaneously strand-like cushioning material 14 continues to be fed from the supply device 12. Also simultaneously, the drive device 70 is controlled so that the guide carriage 32 is moved parallel to the direction of movement 46 away from the end region 52 of the guide section 30 in the direction of the supply device 12.

[0043] The strand-like cushioning material 14 continues to run between the side guide sections 58 as it is wound up for lateral guidance. During the winding process, the cushioning material 14 is held between the side guide sections 58 by the rod-shaped connecting section 64 of the guide carriage 32. Thus, the cushioning material 14 is guided laterally and from above by the guide carriage 32. This prevents the cushioning material 14 from escaping the guide carriage 32 to the side or upwards.

[0044] In Fig. Figure 4 shows the winding process at a second point in time, at which several layers of upholstery material 14 have already been wound onto the winding fork 74 to form the upholstery product 11. The upholstery product 11 now already has an initial diameter 82a. As the diameter 82 of the upholstery product increases, it acts on the end region 52 of the guide section 30 against the preload force of the gas spring 56 and pivots the end region 52 of the guide section 30 away from the winding axis 48 in the pivoting direction 54, thereby compressing the gas spring 56.

[0045] To ensure precise, laterally guided winding of the upholstery material 14 at this point, the guide carriage 32 has been moved away from the winding device 16 in the direction of movement 46 by the drive unit 70, so that the guide carriage 32 is shown here further to the right, i.e., in a position further away from the winding device 16 and closer to the supply device 12. Accordingly, the control unit 72 controls the drive unit 70 depending on a diameter 82 of the coil-shaped upholstery product 11.

[0046] This embodiment of the device 10 comprises a sensor 84, in this example and preferably a camera (hereinafter also referred to as reference numeral 84), which detects the current diameter 82 of the cushioning product 11 and provides a corresponding signal to the control unit 72. It is conceivable that the camera 84, as in Fig. The current diameter 82 of the upholstery product 11 can be directed from above or, alternatively (not shown here), from the front along the winding axis 48 onto the winding fork 74. Alternatively, and not shown here, the current diameter 82 of the upholstery product 11 during the winding process can be determined or at least estimated, for example, from known three-dimensional dimensions (especially the thickness) of a strand-like upholstery material and a known winding speed. For example, it is conceivable that the diameter 82 of the upholstery product 11 is calculated by means of a computing device (not shown here) or by the control device 72 itself.

[0047] In Fig. Figure 5 shows the device 10 towards the end of the winding process. The coil-shaped cushioning product 11 has a second diameter 82b. The second diameter 82b is logically larger than the first diameter 82a and could represent a fully wound cushioning product 11. Accordingly, the guide section 30 is further extended than shown in Figure 5. Fig. 4 pivoted in the direction of rotation 54, and the guide carriage 32 has moved parallel to the direction of movement 46 even closer to the provisioning device 12 in order to enable laterally guided rolling.

Claims

[1] Device (10) for providing a coil-shaped cushioning product (11) for packaging purposes, comprising a dispensing device (12) for providing a strand-like cushioning material (14) and a winding device (16) which winds the strand-like cushioning material (14) into the coil-shaped cushioning product (11), wherein a guide device (20) is arranged between the dispensing device (12) and the winding device (16) which guides the cushioning material (14) from the dispensing device (12) in a feed direction (22) to the winding device (16), characterized by , that the guide device (20) includes a guide carriage (32) for the lateral guidance of the cushioning material (14), and that the guide carriage (32) is movable by means of a drive device (70) at least approximately parallel to the feed direction (22). [2] Device (10) according to claim 1, characterized by, that the guide device (20) has a guide section (30) which extends between the winding device (16) and the provision device (12) and on which the guide carriage (32) is slidably mounted. [3] Device (10) according to claim 2, characterized by , that the guide section (30) is pivotable about a pivot axis (50) which is spaced apart from the winding device (16) and is essentially parallel to a winding axis (48). [4] Device (10) according to claim 2 or 3, characterized by , that an end region (52) of the guide section (30) facing the winding device (16) is pre-tensioned towards the winding axis (48) by a pre-tensioning means (56). [5] Device (10) according to claim 4, characterized by , that the preloading means (56) comprises at least a coil spring or a disc spring or a gas spring or a motor drive. [6] Device (10) according to any one of the preceding claims, characterized by that the drive device (70) comprises at least one drive belt. [7] Device (10) according to any one of claims 2 to 6, characterized by , that the guide section (30) has at least one elongated opening (42) for guiding the guide carriage (32), and / or that the guide section (30) has a lateral guide cam (44) for guiding the guide carriage (32). [8] Device (10) according to any one of the preceding claims, characterized by , that it includes a control device (72) which controls the drive device (70) depending on a diameter (82) of the coil-shaped cushioning product (11). [9] Device (10) according to claim 8, characterized by, that the control device (72) can calculate the current diameter (82) and / or the device (10) includes a sensor (84), in particular a camera, which detects the current diameter (82) of the cushioning product (11) and provides a corresponding signal to the control device (72). [10] Device (10) according to any one of the preceding claims, characterized by , that the winding device (16) has a winding fork (74) which is rotatable about the winding axis (48).

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