DEVICE FOR WINDING AN OBJECT EXTENDING IN A LONGITUDINAL DIRECTION, SUCH AS A CABLE OR A ROPE

Description

[0001] The invention relates to a device for winding up an object extending in a longitudinal direction, such as a cable or a rope, with the object to be wound up, wherein the device has a drum rotatable about an axis of rotation in a direction of rotation, with a support surface extending over the circumference of the drum for supporting the object to be wound up, and projections extending radially away from the axis of rotation of the drum on the sides or in lateral areas of the support surface, which laterally delimit a receiving space for the object to be wound up located between them, and the device includes a means for preventing the windings of the object from piling up in a narrow area of ​​the transverse extension of the support surface.

[0002] The drum is assigned a feed area for the object to be wound up, in which the object is fed to the drum, in particular tangentially or approximately tangentially, before it is placed on the drum.

[0003] Such devices for winding a cable or hose are known from the prior art, wherein the device for preventing the windings from piling up comprises a cable or hose guide between two rollers which can be moved back and forth across the transverse extent of the support surface of the drum for the cables or hoses to be wound by a drive. This device is arranged in the feed area, where it occupies space according to its size.

[0004] Such a device is structurally complex and takes up more space outside the drum.

[0005] From WO 2007 / 080747 A1, a device for winding up an object extending in a longitudinal direction according to the preamble of claim 1 is known.

[0006] US 5,375,786 A and EP 1445228 A2 also disclose devices for winding up an object extending in a longitudinal direction.

[0007] The present invention is based on the objective of providing a device for winding up an object extending in a longitudinal direction, such as a cable or rope, of the type mentioned above, with a structurally simple and space-saving device to avoid the piling up of the windings.

[0008] The problem is solved according to the invention with the features of claim 1, according to which the device described at the outset is provided with a shaft having an external thread to prevent the windings of the object from piling up. This shaft extends transversely across the bearing surface at a small distance from the protrusions via a narrow gap and is mounted about its axis of rotation on a component arranged laterally to the drum. The shaft can be driven exclusively by the area of ​​the object being wound, which rests on the lower windings of the object and contacts the thread from below, by rotating the drum. The gap is kept so small that the object being wound cannot pass through it.

[0009] The device according to the invention enables a portion of the object, already located within a turn during winding and resting on lower turns, to contact the threaded combs and notches of the shaft above, to rotate the shaft in the opposite direction to the rotation of the drum by means of frictional engagement with the thread. The portion of the object in contact with the thread of the shaft is moved transversely to the circumferential direction of the bearing surface over the turns located below it by means of positive and / or frictional engagement with the rotating thread. This measure according to the invention avoids the accumulation of windings in a narrow area of ​​the transverse extent of the bearing surface with minimal design effort and in a space-saving manner.

[0010] In a preferred embodiment of the invention, the shaft is arranged so as not to be displaced along its axis of rotation.

[0011] The shaft is preferably arranged at the point on the drum where the feed area for the item ends, particularly in the case of tangential or nearly tangential feeding, at the point where the feed area touches the drum. However, the shaft can also be arranged in an area adjacent to this point in the direction of rotation of the drum.

[0012] In the case of a vertically arranged drum with a horizontal axis of rotation, the shaft is preferably arranged above the upper area of ​​the drum.

[0013] When using the device according to the invention, the direction of rotation of the drum, viewed from a specific end face of the drum, can be selected such that the area of ​​the object contacting the thread of the shaft is moved by positive and / or frictional engagement with the thread from the respective end face towards the opposite end face of the drum. The shaft is arranged such that, viewed in the direction of rotation of the drum at the location of the shaft and in a horizontal view of the shaft, it has a left-hand thread section when the shaft is contacted by the object in its left-hand area, and / or a right-hand thread section when it is contacted by the object in its right-hand area. The thread crests and notches in the left-hand thread section extend from the left end face of the shaft, rotating counterclockwise, and in the right-hand thread section, they extend from the right end face, rotating clockwise.Rotating clockwise, towards the opposite end face of the shaft. The respective thread segment can extend over part or the entire length of the thread.

[0014] Several shafts distributed around the circumference of the drum can be provided.

[0015] The gap extending between the thread of the shaft and the lateral protrusions of the drum can be so small that there is just no contact between the shaft and the drum.

[0016] The shaft extending across the contact surface can be arranged parallel to the drum's axis of rotation. However, the shaft extending across the contact surface can also run at an angle of less than 45° to a plane perpendicular to the drum's axis of rotation.

[0017] The thread or thread sections of the shaft can be designed as a screw or worm thread. For example, a pointed, round, or trapezoidal thread is suitable for the invention. The thread can be single-start or multi-start. A double-start or multi-start thread has the advantage that the area of ​​the object in contact with the shaft can be moved laterally more quickly than with a single-start thread of the same pitch.

[0018] Viewed in the direction of rotation of the drum at the location of the shaft and in a horizontal view of the shaft, the shaft can have a left-hand thread section in its left area and a right-hand thread section in its right area, which connect to each other at a joint point.

[0019] It may be provided that the right end of the left-hand thread section and the left end of the right-hand thread section are directly connected to each other.

[0020] In particular, the left-hand thread section and the right-hand thread section can be connected to each other in the middle area, especially in the middle of the shaft.

[0021] The connection between the left-hand thread section and the right-hand thread section can be configured such that both thread sections are mirror images of each other with respect to the plane of symmetry running perpendicular to the axis of rotation of the shaft at the connection point. In this case, the plane of symmetry can pass through a thread crest and a thread notch of the adjacent thread sections.

[0022] In an alternative embodiment, the connection can be designed such that the left-hand thread section and the right-hand thread section are arranged at a specific angle, in particular by 180°, relative to a mirror-image arrangement with respect to the plane perpendicular to the axis of rotation of the shaft. The plane at the connection point can then pass through a threaded crest of one threaded section and a threaded notch of the other. Compared to a mirror-image arrangement of the threaded sections, the arrangement offset by, for example, 180° has the advantage that windings of the object being wound between the two threaded sections are not as easily subjected to a clamping effect as in a mirror-symmetrical arrangement.

[0023] The shaft design described above, with a left-hand thread section and a right-hand thread section, is particularly advantageous in the case of a vertically arranged drum whose axis of rotation runs horizontally, or in the case of a drum that is only slightly inclined relative to the vertical, since in this case a region of the object being wound up that contacts the left or right thread section can be moved towards the center of the shaft.

[0024] According to an alternative embodiment of the invention, the shaft can have a continuous left-hand thread or a continuous right-hand thread.

[0025] This design is particularly advantageous for a horizontally arranged drum with a vertical axis of rotation or a drum inclined relative to the horizontal arrangement. In such a drum, the force of gravity acting on the windings of the object being wound acts with at least one component towards the lower end face of the drum. To generate a force acting against gravity, preventing the windings of the object from accumulating in an area of ​​the receiving space adjacent to the lower end face of the drum, the shaft has a continuous left-hand thread if, viewed from below, the lower end face of the drum rotates counterclockwise, and a right-hand thread if, viewed from below, the lower end face of the drum rotates clockwise.This prevents the windings of the object being wound up from accumulating in the lower area of ​​the receiving space of a horizontal drum.

[0026] The shaft can be provided in at least one of its end faces with a frustoconical extension pointing towards its end face, the largest diameter of which is larger than the outer diameter (nominal diameter) of the shaft's thread. The frustoconical extension can be arranged laterally to the protrusion above the drum's support surface for the item to be wound and can engage in the receiving space for the item to be wound.

[0027] According to an alternative embodiment, the outer diameter (nominal diameter) of the thread of the shaft can increase at least in one of its end regions in the direction towards the end face of the shaft adjoining the end region.

[0028] The shaft can be designed as a hollow shaft, which is rotatably mounted on an axle held on or in the side of the drum.

[0029] According to another embodiment, the shaft can have bearing journals on its end faces that engage in bearing receptacles on or in the component arranged laterally to the drum.

[0030] In a preferred embodiment of the invention, the drum is rotatably mounted on the component arranged laterally to the side of the drum.

[0031] The component located laterally to the drum, on which the shaft is rotatably mounted, may include a device for adjusting the distance between the shaft's axis of rotation and the drum's axis of rotation. This device allows for compensation of differences in the drum's outer diameter and in the height of the ridges that laterally define the bearing surface.

[0032] The component located laterally to the drum can have a wall running parallel to the adjacent end face of the drum for supporting the shaft. The drum can also be rotatably mounted on or in the wall. In particular, the component can have two walls running parallel to the respective adjacent end faces of the drum for supporting the shaft and / or the drum. The end face regions of the axle for supporting the shaft, which is designed as a hollow shaft, can be arranged on or in the walls of the component, or the bearing journals arranged on the end faces of the shaft can engage in bearing receptacles.

[0033] The projections arranged laterally to the support surface for the object to be wound onto the drum can have a flange extending radially outwards from the support surface over a certain height on at least one side of the support surface. In this case, the shaft can extend over the flange and the support surface at a small distance from it.

[0034] If the shaft has a frustoconical extension pointing towards the respective end face in one or both of its end face regions, the frustoconical extension can be arranged laterally to the flange above the bearing surface, wherein the distance between the extension and the bearing surface is less than the height of the flange above the bearing surface.

[0035] In a preferred embodiment, the flange, which extends radially outwards on at least one side of the bearing surface, is designed as an annular flange extending over the entire circumference of the drum. The flange can form an end face of the drum on its outer side facing away from the bearing surface.

[0036] The foregoing description reveals a corresponding method for winding an object extending in a longitudinal direction with the aforementioned features, as well as the use of the device according to the invention for winding an object extending in a longitudinal direction with the aforementioned features, which are also included in the invention.

[0037] Several embodiments of the present invention are described in more detail below with reference to the drawing.

[0038] The drawing shows: Figure 1 is a side view of an embodiment with a vertically arranged drum, looking at one end face of the drum; Figure 2 is a view of the embodiment looking in the direction of rotation and perpendicular to the axis of rotation of the drum at the location of the shaft; Figure 3 is a detail of the upper area of Figure 2 Figure 4 shows a perspective view of the embodiment according to Figure 1 Figure 5, an excerpt from Figure 4 Figure 6 shows a side view of the embodiment according to Figure 1 With further rotation of the drum by approximately 20°, Figure 7 shows a view of the embodiment according to Figure 2 With further rotation of the drum by approximately 20°, Figure 8 shows a section of the upper area of Figure 7 Figure 9 shows a perspective view of the embodiment with a further rotation of the drum by approximately 20°, Figure 10 shows a detail of Figure 9Figure 11 shows a top view of an embodiment with a horizontally arranged drum, looking at the upper end face of the drum; Figure 12 shows a view of the embodiment according to Figure 11 Viewed in the direction of rotation and perpendicular to the axis of rotation of the drum at the location of the shaft, Figure 13 shows a section of the left area of Figure 12 Figure 14, a view opposite the view of Figure 12 Figure 15 shows a view of the embodiment rotated by 90°, Figure 16 shows a perspective view of the embodiment, Figure 16 shows a detail of Figure 15 Figure 17 shows a side view of a first embodiment of the shaft perpendicular to the axis of rotation of the shaft; Figure 18 shows an end view of the Figure 17 depicted wave, Figure 19, a perspective view of the in Figure 17 Figure 20 shows a side view of a second embodiment of the shaft perpendicular to the axis of rotation of the shaft, Figure 21 shows an end view of the shaft shown in Figure 20. Figure 20The wave depicted, Figure 22, is a perspective representation of the wave in Figure 22. Figure 20 The shaft shown, Figure 23 a side view of a third embodiment of the shaft perpendicular to the axis of rotation of the shaft, Figure 24 an end view of the in Figure 23 The wave depicted, Figure 25, is a perspective representation of the wave in Figure 25. Figure 23 The shaft shown, Figure 26 a side view of a fourth embodiment of the shaft perpendicular to the axis of rotation of the shaft, Figure 27 an end view of the in Figure 26 depicted wave, Figure 28, a perspective view of the in Figure 26 The shaft shown, Figure 29 a side view of a fifth embodiment of the shaft perpendicular to the axis of rotation of the shaft, Figure 30 an end view of the in Figure 29 The wave depicted, Figure 31, is a perspective view of the wave shown in Figure 31. Figure 29Figure 32 shows a side view of a sixth embodiment of the shaft perpendicular to the axis of rotation of the shaft, Figure 33 shows an end view of the shaft shown in Figure 32. Figure 32 The wave depicted in Figure 34 is a perspective view of the wave shown in Figure 34. Figure 32 The shaft shown, Figure 35 a side view of a seventh embodiment of the shaft perpendicular to the axis of rotation of the shaft, Figure 36 an end view of the in Figure 35 The wave depicted, Figure 37, is a perspective view of the wave in Figure 37. Figure 35 The shaft shown, Figure 38 a side view of an eighth embodiment of the shaft perpendicular to the axis of rotation of the shaft, Figure 39 an end view of the in Figure 38 The wave depicted, Figure 40, is a perspective view of the wave in Figure 40. Figure 38 depicted wave.

[0039] The in the Figures 1-10The device shown for winding up a longitudinally extending object 1, such as a cable or rope, comprises a drum 2 rotatable about an axis of rotation d1 in a direction of rotation r1, with a support surface 3 extending around the circumference of the drum 2 for supporting the object 1 to be wound up. On the sides of the support surface 3, projections 4 extending radially away from the axis of rotation d1 of the drum 2 are provided, laterally delimiting a receiving space 5 located between them for the object 1 to be wound up. The projections 4 are designed as annular flanges 8 extending radially outwards on both sides of the support surface 3 over a height, forming an end face of the drum 2 on their side facing away from the support surface 3.

[0040] Furthermore, the device includes a device 6 for preventing the windings 7 of the object 1 from piling up in a narrow area of ​​the transverse extension of the support surface 3. The device 6 for preventing the windings 7 from piling up has a shaft 9 with an external thread 10, which extends transversely across the support surface 3 and the bottle 8 at a small distance over a narrow gap 11 from the flanges 8 of the drum 2 and is rotatably mounted about its axis of rotation d2 on a component 12 arranged laterally to the drum 2.

[0041] The in the Figures 1-10 The illustrated embodiment shows a version of the device for winding up the longitudinally extending object 1, in which the drum 2 is arranged vertically. In the embodiments described in the Figure 1 and 6In the side views shown, the direction of rotation r1 of the drum 2 is clockwise, so that the object 1 to be wound up is wound over the drum, which is particularly visible in the Figure 1 and 6 The tangential feed area 13 shown is moved in the direction of arrow a. The shaft 9 with its thread 10 is arranged in the circumferential area of ​​the drum 2 adjacent to the feed area 13.

[0042] The Figures 1-5 The figures show the drum in a first rotational position. The area of ​​object 1 extending along the feed area 13 is in the Figures 1-10 The image is shown cut off at a specific point.

[0043] As can be seen particularly from the Figures 3 and 5As can be seen, the area 14 of the object 1 to be wound up, which is fed from the feed area 13 of the drum 2 and rests on one or more lower windings 7, engages in a thread notch of the thread 10 of the shaft 9 in the left area of ​​the receiving space 5 and causes a rotation of the shaft 9 in a direction r2 opposite to the direction of rotation r1 of the drum 2 by means of frictional engagement with the thread 10.

[0044] The Figures 6-10 show this in the Figures 1-5 The illustrated embodiment shows a second rotational position of the drum 2 rotated approximately 20° in the direction of rotation r1 (clockwise) relative to the first rotational position, and a corresponding rotation of the shaft 9 in its direction of rotation r2 (counterclockwise) in the Figure 6The top view shown illustrates this. As can be seen from the cut-off end of the object 1 to be wound in the feed area 13, the object 1 was wound further to a corresponding length. Due to the positive and frictional engagement of the area 14 of the object 1 to be wound, fed from the feed area 13 of the drum 2 and resting on one or more lower turns 7, with the thread 10 of the shaft 9, and the resulting rotation of the shaft 9 by approximately 20° from the position in the Figures 1-5 In the first rotation position shown, the area 14 of the object 1 to be wound up has been moved away from the underlying windings 7 in a transverse direction to the support surface 3 towards its center, so that a build-up of windings in the area of ​​the windings 7 is avoided.

[0045] Looking at the top of the in the Figures 3 and 8The left-hand end face of the shaft 9 has a left-hand thread section 15 in its left area (when this thread section is rotated clockwise, looking down at the left end face of the shaft 9, a section 14 of the object 1 being wound up, engaging in the thread area, moves to the right towards the center of the shaft 9) and a right-hand thread section 16 in its right area (when this thread area is rotated clockwise, looking down at the left end face of the shaft 9, a section of the object 1 being wound up, engaging in this thread area, moves to the left towards the center of the shaft 9).

[0046] In the Figures 11-16In the illustrated embodiment, the drum 2 is arranged horizontally with a vertical axis of rotation d1. The axis of rotation d2 of the shaft 9 is also vertically oriented, with the drum 2 and the shaft 9 arranged relative to each other as described above in relation to the first embodiment according to the Figures 1-10 described.

[0047] In a horizontally arranged drum 2 with horizontal winding, the force of gravity on the windings of the object 1 being wound acts towards the lower end face of the drum 2. To generate a force acting against gravity, which prevents the windings of the object 1 wound onto the drum 2 from accumulating in an area of ​​the receiving space 5 adjacent to the lower end face of the drum 2, the shaft 9, viewed from below, has a continuous left-hand thread, as can be seen in particular from Figure 13emerges. In this way, a section 14 of the object 1 to be wound up, which is fed to the drum 2 from the feed area 13 and which, due to its gravity, tends to settle in the lower area of ​​the receiving space 5 and which comes into contact with the left-hand thread of the shaft 9, experiences an upward movement that lifts it above the lower windings 7.

[0048] The component 12, arranged laterally to the side of the drum 2 and stationary opposite to the rotational movement of the drum 2, exhibits, as can be seen from the Figures 1-16 As can be seen from the embodiments described above, a wall 17 running parallel to the adjacent end face of the drum 2 provides support for the shaft 9. The drum 2 is also rotatably mounted on the wall 17.

[0049] The in the Figures 17-19 The illustrated embodiment of shaft 9 has a left-hand thread section 15 in its horizontal view according to Figure 17, left area and a right-hand thread section 16 in its right area. It is assumed that the shaft 2, when viewed from above on its left end face, is oriented according to Figure 18 rotates clockwise. The two threaded sections are each single-start and connected to each other in the center of the shaft such that they are arranged as mirror images of each other with respect to the mirror plane running perpendicular to the axis of rotation d2 of the shaft 9 at the connection point. The mirror plane runs, as can be seen in particular from Figure 17 This is formed by a threaded comb and a threaded notch of the adjacent threaded sections.

[0050] The in the Figures 20-22 The embodiment of shaft 9 shown differs from that shown in the Figures 17-19 by the fact that the two threaded sections are at an angle of 180° to the one in the Figures 17-19The mirror-image arrangement shown is offset from each other. The plane, arranged perpendicular to the axis of rotation of shaft 9 in its center at the connection point, runs through a threaded crest of one threaded section and a threaded notch of the other threaded section.

[0051] The in the Figures 23-25 The embodiment of shaft 9 shown differs from the one described in the Figures 17-19 in the illustrated embodiment, in that the shaft 9 has a double-start thread in each thread section.

[0052] The in the Figures 26-28 The embodiment of shaft 9 shown differs from the one described in the Figures 20-22 The illustrated embodiment is also characterized by the fact that the two thread sections are designed as double-start threads. This embodiment corresponds to that of the embodiment shown in the exemplary embodiment according to the Figures 1-10 used wave 9.

[0053] The Figures 29-31show a shaft 9, whose threads, like those in the Figures 17-19 The illustrated embodiment has a left-hand thread section 15 and a right-hand thread section 16, which are mirror-symmetrical with respect to the central plane perpendicular to the axis of rotation d2 of the shaft 9. At its ends facing the two end faces, the shaft 9 is provided with a frustoconical extension 18 immediately adjoining the respective thread section, the largest diameter of which is larger than the outer diameter (nominal diameter) of the two thread sections. When this shaft is used in the configuration described by the Figures 1-10In the illustrated embodiment of the device for winding up a longitudinally extending object, the frustoconical extensions 18 can be arranged laterally to the projections 4 above the support surface 3 of the drum 2 for the object 1 to be wound up and engage in the receiving space 5 for the object 1 to be wound up.

[0054] Since the frustoconical extensions 18 of the in the Figures 29-31 Since the shaft 9 shown protrudes into the receiving space 5 of the drum 2 on the inner sides of the projections 4, contact of the extensions 18 with the component 12 is avoided by spacer rings 20 arranged concentrically to the axis of rotation d2 of the shaft 9.

[0055] The extensions 18 direct the contact areas 14 of the object 1 being wound towards the threaded area of ​​the shaft 9 in order to prevent a build-up of windings in the receiving space 5 of the drum 2 adjacent to the protrusions 4.

[0056] An alternative embodiment of shaft 9 is described in the Figures 32-34 As shown, the outer diameter (nominal diameter) of each threaded section of the shaft 9 increases in both its end regions towards the end face of the shaft 9 adjoining the respective end region. This measure achieves a targeted arrangement of the windings of the object 1 being wound, with their height increasing towards the center of the receiving space 5 of the drum 2.

[0057] In the Figures 17-34In the illustrated embodiments, the shaft 9 is designed as a hollow shaft which is rotatably mounted on an axis (not shown in the drawing) which is rotatably mounted on or in the stationary component 12 opposite the rotatable drum 2.

[0058] Instead of a hollow shaft, a shaft 9 with bearing journals 19 projecting outwards at its end faces can be mounted on the component 12, as shown in the Figures 35-37 This is shown as an example. In this example, the shaft 9 has a left-hand thread section 15 and a right-hand thread section 16 according to the diagram. Figures 26-28 as illustrated in the embodiment. The connection of the two threaded sections is also as shown in the Figures 26-28 shown condition.

[0059] For storing the items in the Figures 35-37In the illustrated shaft 9, as well as in the other embodiments described here by way of example, two walls 17 of the component 12 are preferably provided, extending laterally to the drum 2, on or in which the shafts 9 can be supported. In particular, the two end bearing journals 19 of the shaft 9 can engage in bearing receptacles (not shown in the drawing).

[0060] During the Figures 38-40 In the illustrated embodiment, shaft 9 is provided with a continuous double-start thread. Shaft 9 is again designed as a hollow shaft.

[0061] When using this wave in the through the Figures 11-16 The illustrated embodiment of a device for winding up an object extending in a longitudinal direction can be described in the Figures 38-40 Shaft 9 shown has a left-hand thread, as in particular in Figure 13 It should be installed, as shown and described in more detail above. Reference symbol list

[0062] 1 Object 2 Drum 3 Support surface 4 Raise 5 Receiving space 6 Device 7 Winding 8 Flange 9 Shaft 10 Thread 11 Gap 12 Component 13 Feed area 14 Area 15 Left-hand thread section 16 Right-hand thread section 17 Wall 18 Extension 19 Bearing journal d1 Axis of rotation d2 Axis of rotation r1 Direction of rotation r2 Direction of rotation a Arrow

Claims

1. Device for winding on an object (1) extending in a longitudinal direction like a line or a rope, with the object to be wound, wherein the device has a drum (2) rotatable about an axis of rotation (d1) in a direction of rotation (r1) and having a supporting surface (3) extending over the periphery of the drum (2) for support of the object (1) to wound on and raised portions (4) which extend radially away from the axis of rotation (d1) of the drum (2) at the sides or in lateral regions of the supporting surface (3) and which laterally delimit a receiving space (5) disposed between them for the object (1) to be wound on, and the device includes a device (6) for preventing the windings of the object (1) from piling up in a narrow region of the transverse extent of the supporting surface (3), wherein the device (6) for preventing the windings of the object (1) from piling up has a shaft (9) which has an external thread (10) and which extends transversely over the supporting surface (3) at a small spacing over a narrow gap (11) from the raised portions (4) and is mounted about its axis of rotation (d2) at a component (12) arranged laterally of the drum (2), characterized in that the shaft (9) is drivable exclusively by the region of the object (1) being wound that rests on lower windings of the object (1) and contacts the thread (10) from below, caused by the rotation of the drum (2), and the gap (11) is kept so small that the object (1) to be wound cannot pass through it.

2. Device according to claim 1 characterized in that associated with the drum (2) is a feed region for the object to be wound on, in which the object is fed to the drum (2) tangentially, before it is brought into the state of being supported on the drum (2), and the shaft (9) is arranged at the location of the drum (2) at which the feed region for the object (1) ends and touches the drum (2) or in a region adjacent to that location in the direction of rotation of the drum (2).

3. Device according to claim 1 or 2, characterized in that the shaft (9), viewed in the direction of rotation (r1) of the drum (2) at the location of the shaft (9) and with a horizontal view of the shaft (9), has a left-hand thread portion (15) in its left-hand region and a right-hand thread portion (16) in its right-hand region.

4. Device according to claim 3, characterized in that the right end of the left-hand thread portion (15) and the left end of the right-hand thread portion (16) are connected directly together.

5. Device according to claim 4, characterized in that the left-hand thread portion (15) and the right-hand thread portion (16) are connected together in the center of the shaft (9) and the left-hand thread portion (15) and the right-hand thread portion (16) are arranged in mirror-image relative to each other with respect to the plane extending at the connecting location perpendicularly to the axis of rotation (d2) of the shaft (9).

6. Device according to claim 4, characterized in that the left-hand thread portion (15) and the right-hand thread portion (16) are connected together in the center of the shaft (9) and the left-hand thread portion (15) and the right-hand thread portion (16) are arranged displaced relative to each other through 180° about the axis of rotation (d2) with respect to a mirror-image arrangement with respect to the plane extending perpendicularly to the axis of rotation (d2), wherein in particular the plane extends at the connecting location through a thread crest of the one thread portion and a thread groove of the other thread portion.

7. Device according to claim 1 or 2, characterized in that the shaft (9), viewed in the direction of rotation of the drum (2) at the location of the shaft, has a continuous left-hand thread and a continuous right-hand thread.

8. Device according to any of claims 1 to 7, characterized in that the shaft (9) is in the form of a hollow shaft and is mounted rotatably on a axis held at or in the component (12) arranged laterally of the drum (2).

9. Device according to claim 8, characterized in that at its end faces the shaft (9) has bearing journals (19) which engage into bearing mountings at or in the component arranged laterally of the drum (2).

10. Device according to any of claims 1 to 9, characterized in that at least in one of its end regions the shaft (9) is provided with a frustoconical enlargement (18) which faces towards the end face in question and the largest diameter of which is larger than the outside diameter of the thread (10) of the shaft (9), wherein the spacing between the enlargement (18) and the supporting surface (3) is less than the height of the flange (8) above the supporting surface (3).

11. Device according to any of claims 1 to 9, characterized in that the outside diameter of the thread (10) of the shaft (9) increases at least in one of its end regions in a direction towards the end face of the shaft (9), that adjoins the end region.

12. Device according to claim 8 or 9, characterized in that the component (12) arranged laterally of the drum (2) has a wall (17) for mounting the shaft (9), said wall extending parallel to the adjoining end face of the drum (2).

13. Device according to claim 12, characterized in that the drum (2) is also mounted rotatably to the wall (17).

14. Device according to any of claims 1 to 13, characterized in that at least one of the raised portions (4) arranged laterally of the supporting surface (3) for the object (1) to be wound on the drum (2) is in the form of a flange (8) which extends radially outwardly from the supporting surface (3) over a height, wherein the shaft (9) extends at a small spacing relative to the flange (8) over the same and the supporting surface (3).

15. Device according to claim 14, characterized in that the flange (8) extending radially outwardly at least at one side of the supporting surface (3) is in the form of a flange in the shape of a circular ring which extends over the entire periphery of the drum (2) and which at its outside remote from the supporting surface (3) forms an end region of the drum (2).