EP3419773A1

EP3419773A1 - Production system for processing a wire material wound to form a wire reel, comprising a conveying means with permanent magnets

Info

Publication number: EP3419773A1
Application number: EP17716439.9A
Authority: EP
Inventors: Hubert RAPPERSTORFER
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-02-22
Filing date: 2017-02-22
Publication date: 2019-01-02
Also published as: AT518346A1; WO2017143374A1; RU2018133456A; US20190054517A1; CN108883453A

Abstract

The invention relates to a production system (1) for processing a wire material (3) wound to form a wire reel (2), in particular reinforcing steel. The production system (1) comprises a receiving device (4) for receiving the wire reel (2); an unreeling device (5) for removing the wire material (3) on the wire reel (2); and a processing device (10) for processing the removed wire material (3). The unreeling device (5) comprises a conveying means (8) surrounding a first deflection roller (6) and a second deflection roller (7), wherein permanent magnets (16) are arranged on the conveying means (8) and an increased frictional connection can be established between a surface (13) of the wire material (3) and an outer surface (12) of the conveying means (8) by means of the permanent magnets (16).

Description

MANUFACTURING SYSTEM FOR PROCESSING A WIRE MATERIAL WRAPPED TO A WIRE SPOOL

WITH A CONVEYOR WITH PERMANENT MAGNETS

The invention relates to a production plant for processing a wire coil gewekelte to a wire coil, in particular reinforcing steel.

It is known from the prior art that reinforcing steel, which is wound into a wire spool, is unwound in a production plant by virtue of the fact that the wire spool is driven and the reinforcing steel is actively unwound. In addition, it is provided that a conveying device is formed on which two mutually opposite rollers are provided, between which the wire material is clamped. At least one of the two rollers is driven and by the frictional engagement between the roller and wire material, a tensile force can be exerted on the wire material in order to promote the unwound from the roll wire material can.

The known from the prior art from spool device has the disadvantage that, especially in reinforcing steel, due to the rough surface structure or its ribbed surface, it may come to a relative movement between the driven roller and the wire material. Thus, such a conveying device can only have a low accuracy. In addition, the maximum possible pulling force of the unwinding device is limited due to the poor contact between the ribbed surface of the reinforcing steel and the driven roller.

The object of the present invention was to overcome the disadvantages of the prior art and to provide an improved manufacturing plant for processing a wire material wound into a wire bobbin.

This object is achieved by a production plant according to claim 1. According to the invention, a production plant for processing a wire wound into a wire spool, in particular reinforcing steel, is formed. The manufacturing facility comprises: a receiving device for receiving the wire spool; a spooling device for removing the wire spool located on the wire spool; and a processing device for processing the withdrawn wire material. The take-off device comprises a conveying means revolving around a first deflection roller and a second deflection roller, wherein permanent magnets are arranged on the conveying means and an increased frictional engagement between a surface of the wire material and an outer surface of the conveying means can be produced by means of the permanent magnets.

An advantage of the inventive design is that the Ab coil device with the rotating conveyor and the permanent magnet arranged therein can apply an increased tensile force to be handled by the wire coil wire material. In addition, the length of the wire material unwound from the wire spool can be determined with high accuracy by the unwinding device designed according to the invention. In particular, with reinforcing steel with a rough surface, the accuracy over conventional conveyor devices with pinch rollers can be significantly improved. Furthermore, it can be provided that the receiving device is driven to receive the wire coil and thereby the unwinding of the wire material is facilitated.

Furthermore, it may be expedient if the conveying means of the unwinding device is designed as a conveyor belt. In particular, it can be provided that the Ab coil device is designed as a belt conveyor. The advantage here is that a conveyor belt can have a high flexibility and, moreover, can have good aging resistance. In addition, the conveyor belt may be formed of a rubbery material, whereby an increased riding fit can be established between the outer surface of the conveyor belt and the surface of the wire material. Furthermore, it can be provided that the receiving device is designed to receive a raw material roll, wherein the coil-wound wire material is arranged on the raw material roll. The advantage here is that the wire material is not clamped directly to the receiving device, but a standardized raw material roll can be used, which can be accommodated on the receiving device.

In addition, it can be provided that the receiving device has a braking mechanism by which the wire material of the wire coil tightens during the unwinding becomes. The advantage here is that the wire material does not run uncontrollably from the wire coil and thus tangling of the wire material is held back on the wire coil.

Also advantageous is an expression, according to which it can be provided that the unwinding device is arranged in the production system such that the wire material in one

Sheet is guided to the processing device. This brings with it the advantage that the processing device downstream from the unwinding device does not have to be operated synchronously with the unwinding device, but rather that the sheet of the wire material forms an intermediate buffer and thus the processing speed or the flexibility of the production systems can be increased. In other words, the wire material is provided in a loose loop, which forms the intermediate buffer, whereby the wire material can be removed without load. In particular, it can be achieved by this measure that the wire coil, which has a high mass inertia, does not have to be constantly set in motion with high acceleration values. In addition to an achievable energy saving, this measure can also improve the longevity of the production plant.

According to a development, it is possible that the processing device is designed as a straightening device for straightening the wire material. The advantage here is that the abgegewi- disgusted wire material can be prepared in the processing device for further processing in all types of manufacturing equipment for processing straight round bars of material. Such a production plant can be designed, for example, for the production of reinforcing mats. Furthermore, it may be expedient if the unwinding device has at least three deflection rollers, wherein the axes of rotation of the deflection rollers are arranged on a circular arc, so that the wire material is guided in an arc shape around the unwinding device. The advantage here is that a realizable tensile force for unwinding the wire material can be increased by this measure, since the wrap angle of the wire material can be increased by the Abspul- device.

In addition, it can be provided that the Ab coil device is coupled to a servo motor. The drive of the spool device with a servomotor brings with it the advantage that the abzuspulende length of the wire material with high accuracy can be predetermined or measured.

Furthermore, it can be provided that the spooling device is movably mounted on the production line. The advantage here is that the spooling device can be adapted by this measure to the current winding state of the wire coil. In particular, it can be provided that the spooling device is laterally displaceable. Furthermore, it can be provided that the Ab coil device can be adapted to different Abspuldurchmesser the wire coil. For this purpose, it can be provided that the unwinding device is axially displaceable with respect to its longitudinal extension, or is mounted pivotably with respect to the longitudinal extension of the production line.

According to a particular embodiment, it is possible that on a side facing the receiving device from the spool device, a guide element on the spooling device is arranged.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

In each case, in a highly simplified, schematic representation:

Fig. 1 is a schematic representation of an embodiment of a manufacturing plant with a take-off device;

Fig. 2 is a schematic side view of an embodiment of the spool device from;

Fig. 3 is a cross-sectional view of a first embodiment of a conveyor;

4 is a cross-sectional view of a second embodiment of the conveyor; a cross-sectional view of a third embodiment of the conveyor;

Fig. 6 is a schematic side view of another embodiment of the Abspul

Contraption;

Fig. 7 is a schematic side view of another embodiment of the conveyor;

8 is a schematic representation of a further embodiment of a production plant with a unwinding device;

Fig. 9 is a schematic representation of another embodiment of a manufacturing plant with a spooling device and another processing plant

10 a schematic representation of a further embodiment of a production plant with a space-saving arranged unwinding device;

Fig. 11 is a schematic representation of another embodiment of a manufacturing plant with a spooling device and a lever for buffering.

Introductoryly it should be noted that in the differently described embodiments, the same parts provided with the same reference numerals or the same component names who the, with the disclosures contained throughout the description can be applied mutatis mutandis to equivalent parts with the same reference numerals and the same component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and these position information in a change in position mutatis mutandis to transfer to the new location.

1 shows a schematic representation of a first exemplary embodiment of a production plant 1. The production plant 1 is designed for processing a wire material 3 wound into a wire coil 2. The manufacturing plant 1 comprises a receiving device 4 for receiving the wire spool 2. Furthermore, from a spooling device 5 is formed, by means of which the wound on the wire spool 2 wire material 3 can be deducted. The unwinding device 5 comprises a first deflection roller 6 and a second deflection roller 7 between which a conveying means 8 is tensioned. The spooling device 5 will be described in more detail in the description of figures for Figure 2 in more detail.

It is further provided that the manufacturing plant 1 comprises a processing device 10, which serves for further processing of the unrolled wire material 3. The processing device 10 may for example be designed as a straightening system 11 and thus serve to straighten the wire material 3.

In further, not shown alternative variants, the processing device 10 may be formed, for example, as a cutting device, which serves to cut to length of the wire material 3.

In Fig. 2 shows a further and optionally independent embodiment of the spooling device 5 is shown, again with the same parts the same reference numerals or component names as in the previous Fig. 1 are used. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIG.

For removing the wire material 3 from the wire coil 2, it is provided that an outer surface 12 of the conveying means 8 is in contact with a surface 13 of the wire material 3 and that the wire material 3 is moved by the conveying means 8. In particular, it is provided that the wire material 3 is transported by acting between the outer surface 12 of the conveyor 8 and the surface 13 of the wire material 3 friction, preferably without slippage, with the advancing movement of the conveyor 8. Fig. 3 shows an embodiment of the conveyor 8 with the wire material 3 arranged thereon in a cross-sectional view. As shown in Fig. 3, the conveying means 8 may preferably have a rectangular cross-sectional shape. In an alternative variant, however, it can also be provided that the conveying means 8 has a round or else a different cross-sectional shape. The conveyor 8 may be formed, for example in the form of a conveyor belt 9. Alternatively, it is conceivable that the conveyor 8 is formed for example in the form of a chain. In yet another embodiment, it is conceivable that the conveyor 8 is formed for example in the form of a toothed belt.

As can be seen from a combination of FIGS. 2 and 3, provision can be made for the wire material 3 to rest on the outer surface 12 of the conveying means 8. The outer surface 12 opposite an inner surface 14 of the conveyor 8 is arranged, which can be performed on a support unit 15 of the spooling device 5.

In order to achieve the best possible adhesion of the conveyor 8 on the surface 13 of the Drahtmateri- than 3, it is provided that on the conveyor 8 or within the conveyor 8 permanent magnets 16 are arranged, by means of which the conveyor 8 is pressed against the wire material 3.

In order to further increase the frictional force between wire material 3 and conveying means 8, it can be provided that the outer surface 12 has a certain surface roughness. Furthermore, it can be provided that the outer surface 12 has a coating in order to increase the coefficient of friction or the wear resistance of the conveying means 8. Such a coating may for example be a special rubber material or another plastic material.

Furthermore, it is conceivable that the conveying means 8 has a core material 17 which serves to absorb the tensile forces in the conveying means 8. The core material 17 can be formed, for example, as a textile fabric, by plastic fibers, by steel fibers or otherwise. The conveyor 8 is driven by a drive unit 18, which may be designed in particular as a servomotor 19. The drive unit 18 can be coupled to either the first deflection roller 6 or the second deflection roller 7. A drive unit 18, which is designed as a servomotor 19, has the advantage that the conveying means 8 and thereby the wire material 3 can be accurately positioned by means of the spooling device 5. As an alternative to the servomotor 19, a stepper motor can be used as the drive unit 18, for example, wherein when using a stepper motor, an additional sensor 20 is needed, which detects the current position of the conveyor 8.

Such a sensor 20 may be formed, for example, in the form of a rotation angle sensor, which may be coupled to the first deflection roller 6 and the second deflection roller 7 of the unwinding device 5. Furthermore, the sensor 20 may be formed, for example, as an incremental sensor, which strips an incremental strip arranged on the conveying means 8. The conveying means 8 can largely consist of a plastic material, in particular of a rubber-like material.

As indicated schematically, it may moreover be provided that the inner surface 14 of the conveying means 8 has a toothing 21 which may correspond to a counter toothing 22 of one of the deflection rollers 6, 7. By such a toothing, the positioning accuracy of the unwinding device 5 can be increased.

As can be seen from Fig. 2, it can also be provided that in the region of the Ab coil device 5, a light barrier 23 and a detection means is arranged, by means of which an end face 24 of the wire material 3 can be detected. As a result, when inserting a new wire material 3, the beginning of the wire material 3 can be determined. In addition, it can be provided that the light barrier 23 has an extended functionality as a detection means and, for example, serves to detect or to determine the wire material 3. In particular, it can be provided that a diameter 25 or the type of wire material 3 can be detected by means of the light barrier 23. As can be seen from FIG. 3, it can be provided that a thickness 26 of the permanent magnet 16 is chosen to be smaller than a thickness 27 of the conveying means 8. As a result, the permanent magnet 16 is received in the conveying means 8 with an overlap 28. In particular, it can be achieved that the permanent magnet 16 can not fall out of the conveying means 8.

Furthermore, it may be provided that a width 29 of the permanent magnet 16 is selected to be smaller than a width 30 of the conveying means 8. FIG. 4 shows a further embodiment of the conveying means 8, which is possibly independent of itself Component names are used as in the previous Fig. 3. To avoid unnecessary repetition, reference is made to the detailed description in the preceding FIG.

As can be seen from FIG. 4, it can be provided that the permanent magnet 16 protrudes from the conveying means 8 and thus the outer surface 12 on which the wire material 3 rests is formed directly on the permanent magnet 16. In such an embodiment, the thickness 27 of the conveyor 8 compared to the thickness 26 of the permanent magnet 16 can be kept low, which can be achieved that the guide roller or the drive roller may have the smallest possible diameter, since the flexibility of the conveyor. 8 can be increased.

FIG. 5 shows a further embodiment of the conveying means 8, which may be independent of itself, with the same reference numerals or component designations being used again for the same parts as in the preceding FIGS. 3 and 4. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 3 and 4 or reference. As can be seen from FIG. 5, it can be provided that a groove-shaped depression 31 is formed, which is arranged on the outer surface 12 of the conveying means 8. The groove-shaped recess 31 extends over a longitudinal extent 32 of the conveying means 8. With others In words, the groove-shaped recess 31 is arranged circumferentially on the conveyor 8.

As can be seen from FIG. 4, it is preferably provided that a groove base 33 of the groove-shaped depression 31 has a rounding, so that the wire material 3 is always the deepest

Point of the groove bottom 33 rests. It can thereby be achieved that the point of contact between wire material 3 and outer surface 12 of the conveying means 8 is always at the same level even with different wire materials 3 with different diameters 25. In an alternative, not shown, embodiment variant can also be provided that the groove-shaped recess 31 is formed in the form of a V-shaped groove.

FIG. 6 shows a schematic longitudinal section of a further embodiment of the conveying means 8, which may be independent of itself, wherein the same reference numerals or component designations as in the preceding FIGS

5 are used. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 1 to 5 or reference.

As can be seen from FIG. 6, provision can be made for the conveying means 8 to have recesses 34 which, starting from the outer surface 12 of the conveying means 8, extend in the direction of the inner surface 14 of the conveying means 8. The recesses 34 have a Auszufiefe 35, which is less than the thickness 27 of the conveyor 8. By the recesses 34 can be achieved that the conveyor 8 can be deflected by a pulley with a small diameter only.

The individual permanent magnets 16 may be received between the recesses 34 in the conveyor 8.

FIG. 7 shows a schematic longitudinal section of a further embodiment of the conveying means 8, which may be independent of itself, wherein the same reference numerals or component designations as in the preceding FIGS

6 are used. To avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 1 to 6 or reference. As can be seen from FIG. 7, it can be provided that the recesses 34 are formed directly between the individual permanent magnets 16. FIG. 8 shows a further embodiment of the production system 1, which may be independent of itself, wherein the same reference numerals or component designations are used again for the same parts as in the preceding FIGS. 1 to 7. To avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 1 to 7 or reference.

As can further be seen from FIG. 8, it may be provided that the wire spool 2 is arranged on a raw material roll 36. The raw material roll 36 can serve to be able to transport the wire spool 2 more easily, or to easily wind the wire spool 2 on the raw material roll 36.

Furthermore, a brake mechanism 37 can be provided, by means of which the raw material roll 36 or the wire coil 2 can be braked. Thus, an unwanted unwinding of the wire coil 2 can be largely avoided. In addition, by tightening the wire material 3, it can be obviated that loops form on the wire spool 2, in which the wire material 3 jams.

Furthermore, it can be provided that the wire material 3 is guided in an arc 38 to the processing device 10. This has the advantage that the sheet 38 serves as a buffer. In this case, the processing device 10 may have high acceleration values during the insertion of the wire material 3, wherein the wire material 3 does not have to be unwound from the wire spool 2 at the same speed.

Furthermore, it can be provided that in the spooling device 5 between the first guide roller 6 and the second guide roller 7 at least a third guide roller 39 is arranged. The axes of rotation 40 of the three guide rollers 6, 7, 39 can, as can be seen in this embodiment, be arranged in a circular arc 41 to each other, so that the wire material 3 arcuately guided around the device 5 from spool. The more of the additional deflection rollers 39 are arranged between the first deflection roller 6 and the second deflection roller 7 are, the more the course of the conveyor 8 can be adjusted to the contact surface of a continuous arc. By this design of the unwinding device 5 can be achieved that the wrap angle can be increased from the spooling device 5 and thus the frictional force between the conveyor 8 and wire material 3 can be increased.

Furthermore, it can be provided that on one of the receiving device 4 facing side 42 of the spooling device 5, a guide member 43 is arranged on the spooling device 5 from. The guide element 43 may be formed, for example, in the form of a ring-like element which has a central bore through which the wire material 3 is guided and through which the guidance or centering of the wire material 3 can be achieved.

Furthermore, it can be provided that the take-off device 5 is guided on a guide rail 44, by means of which the take-off device 5 can be displaced in a vertical direction. As a result, the position of the spooling device 5 can be adapted to different diameters of the wire spool 2. In addition, it can be provided that the unwinding device 5 is displaceably guided in a horizontal direction in order to be able to displace the unwinding device 5 with respect to the width of the wire spool 2 and thus to be able to be adjusted with respect to the current winding position of the wire material 3.

Furthermore, it can be provided that the Ab coil device 5 can be pivotally mounted. This can be particularly advantageous to be able to adapt the Ab coil device 5 to different positions or Abspulzustände the sheet 38.

FIG. 9 shows a further embodiment of the production system 1, which may be independent of itself, wherein the same reference numerals or component designations are used again for the same parts as in the preceding FIGS. 1 to 8. To avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 1 to 8 or reference.

As can be seen from FIG. 9, it can be provided that the unwinding device 5 is positioned in such a way to the wire spool 2 that the wire material 3 is in a continuous arc of the wire coil 2 passes into the spooling device 5 from. This can be particularly advantageous if the wire spool 2 is driven and largely synchronously with the spooling device 5 from running. The continuous sheet can serve as a buffer between wire coil 2 and unwinding device 5.

As can be seen from FIG. 9, it is possible to provide that a cutting device 45 is connected to the processing device 10, which cuts the wire material 3 into raw material bars 46. The raw material rods 46 can then be transported vertically downward, for example, with a vertical conveyor 47, in order subsequently to be able to be transported with one or more horizontal belts 48 to a further vertical conveyor 47. From this further vertical conveyor 47, the raw material rods 46 can be fed to a rod deflection device 49, in which the raw material rods 46 can be further shortened. FIG. 10 shows a further embodiment of the production plant 1, which may be independent of itself, wherein the same reference numerals or component designations are again used for the same parts as in the preceding FIGS. 1 to 9. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 1 to 9 or reference.

As can be seen from Fig. 10, it can be provided that the Ab coil device 5 is arranged in directly to the wire coil 2, so that it takes up as little space. The wire material 3, before it is introduced into the processing device 10 form an arc, which can compensate as buffer different Abspulgeschwindigkeiten between pulp device 5 and wire coil 2.

FIG. 11 shows a further embodiment of the production system 1, which may be independent of itself, wherein the same reference numerals or component designations are used again for the same parts as in the preceding FIGS. 1 to 10. To avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 1 to 10 or reference. As can be seen from FIG. 11, provision can be made for a lever 50 to be arranged in the region of the wire spool 2, which lever is spring-loaded and deflects the wire material 3 via a deflection roller arranged at the end of the lever. By a pivoting movement of the lever 50, a buffer for the wire material 3 can be created, which can compensate for different Abspulge speeds between Ab coil device 5 and wire coil 2.

The embodiments show possible embodiments, it being noted at this point that the invention is not limited to the specifically illustrated embodiments of the same, but also various combinations of the individual embodiments are possible variants with each other and this variation possibility due to

Teaching for technical action by objective invention in the skill of those working in this technical field is the expert.

The scope of protection is determined by the claims. However, the description and drawings are to be considered to interpret the claims. Individual features or combinations of features from the illustrated and described different embodiments may represent for themselves inventive solutions. The task underlying the independent inventive solutions can be taken from the description.

All statements of value ranges in the present description should be understood to include any and all sub-ranges thereof, e.g. is the statement 1 to 10 to be understood that all sub-areas, starting from the lower limit 1 and the upper limit 10 are included, ie. all sub-areas begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8, 1, or 5.5 to 10.

For the sake of order, it should finally be pointed out that, for a better understanding of the structure, elements have been shown partly out of scale and / or enlarged and / or reduced in size. REFERENCE NUMBERS

Production plant 31 groove-shaped recess

Wire spool 32 longitudinal extension

Wire material 33 groove base

Reception 34 Recess

From Spulvorri direction 35 Auszufiefe first guide roller 36 raw material roller second guide roller 37 Bremsmechani smus

Conveyor 38 bow

Conveyor belt 39 third deflection roller

P reparation instructions 40 Rotational axis

Straightener 41 circular arc

Outside surface conveying means 42 facing side

Surface wire material 43 guide element

Inner surface 44 Guide rail

Carrying unit 45 Cutting device

Permanent magnet 46 raw material rod

Core material 47 Vertical conveyor

Drive unit 48 horizontal band

Servomotor 49 Stababi ängvorri rect

Sensor 50 lever

gearing

counter teeth

photocell

face

Diameter wire material

Thick permanent magnet

Thick conveyor

Cover permanent magnet

Wide permanent magnet

Broad funding

Claims

Patent claims

1. Production plant (1) for processing a wire spool (3) wound into a wire spool (2), in particular reinforcing steel, the production plant (1) comprising:

a receiving device (4) for receiving the wire spool (2);

a spooling device (5) for removing the wire spool (3) on the wire spool (2);

and a processing device (10) for processing the withdrawn wire material (3), characterized in that

the Ab spul device (5) comprises a first deflection roller (6) and a second guide roller (7) circulating conveyor (8), wherein on the conveyor (8) permanent magnets (16) are arranged and by means of the permanent magnets (16) an elevated Friction between a surface (13) of the wire material (3) and an outer surface (12) of the conveying means (8) can be produced.

2. Production plant according to claim 1, characterized in that the conveying means (8) of the spooling device (5) is designed as a conveyor belt (9).

3. Production plant according to claim 1 or 2, characterized in that the receiving device (4) for receiving a raw material roll (36) is formed, wherein at the

Raw material roll (36), the coil-wound wire material (3) is arranged.

4. Production plant according to one of the preceding claims, characterized in that the receiving device (4) has a braking mechanism (37) through which the wire material (3) of the wire spool (2) is tightened during the unwinding.

5. Production plant according to one of the preceding claims, characterized in that the spooling device (5) in such a way in the manufacturing plant (1) is arranged, that the wire material (3) in a sheet (38) to the processing device (10) is guided.

6. Production plant according to one of the preceding claims, characterized in that the processing device (10) is designed as a straightening system (11) for straightening the wire material (3).

7. Production plant according to one of the preceding claims, characterized in that from the coil from the direction (5) in addition to the first deflection roller (6) and the second deflection roller (7) at least one third deflection roller (39), wherein the rotation axes (40 ) of the deflection rollers (6, 7, 39) in a circular arc (41) are arranged to each other, so that the wire material (3) arcuately to the spooling device from (5) is guided.

8. Production line according to one of the preceding claims, characterized in that the spooling device (5) with a servo motor (19) is coupled.

9. Production plant according to one of the preceding claims, characterized in that from the spooling device (5) is movably mounted on the manufacturing plant (1).

10. Production system according to one of the preceding claims, characterized in that on one of the receiving device (4) facing side (42) of the unwinding device (5), a guide element (43) on the spooling device from (5) is arranged.