EP2398727B1 - Winding spindle - Google Patents

Description

The invention relates to a winding spindle according to the preamble of claim 1.

Winding spindles are used in winding machines, which serve to wind continuously tapering threads into spools. For this purpose, the threads in the winding machine are initially changed by a traversing device transversely to the thread running direction and guided over a rotating pressure roller. The pressure roller sets the threads on each of the wound coils to be wound. Several coils are arranged in alignment one behind the other on a common winding spindle. This makes it possible to wind several threads at the same time. The full bobbins and the empty tubes, on which the bobbins are wound up, are taken axially from the winding spindles during an exchange or attached to the winding spindle. For this purpose, the winding spindles are cantilevered cantilevered.

After attaching the sleeves they are fixed by clamping means in position and centered. These clamping devices are provided inside the winding spindle and take up space for their function. A winding spindle with integrated clamping means is for example from the patent application DE 101 63 832 A1 known. The winding spindle is essentially formed by a tubular support which is connected to a driven and rotatably mounted shaft. Outside the tubular support, the clamping means are provided, which are enclosed by a further tubular holder. The outer diameter of the winding spindle is thus determined by the diameter of the holder. On the other hand, the diameter of the tubular support, which is decisive for the static and dynamic properties of the winding spindle, is smaller by twice the thickness of the clamping means. This loss of space for the wearer is particularly painful since the bending stiffness of a pipe in the fourth power depends on the diameter.

From the DE 463 085 C For example, there is known a device for mounting and guiding coils on a retaining core, in which the coils are clamped axially between a shaft and a head on a bolt. Furthermore, from the DE 813 522 C a Vorgarnwickelwalze known in which coils are stretched axially on a roller between two edge discs, wherein one of the two edge discs is held by means of a closure body with spring bolts.

Accompanied by the ever-increasing capacity of winding machines, today the winding spindles are designed for 8 or more spools, so that the spool spindles have corresponding length, which are dynamically soft and thus easy to excite vibrations. At the same time high winding speeds are required by the winding spindles, which lead to correspondingly high speeds of the winding spindle, which has a vibration excitation in a wide frequency band in the course of the winding cycle result. Another conflict of objectives arises from the requirement to store as much volume in a coil, which prohibits large inner diameter of the coils and thus large outer diameter of the winding spindles.

It is therefore an object of the invention to provide a winding spindle which has favorable dynamic properties with a large length and a small diameter.

This object is achieved by a winding spindle, in which each clamping means is associated with a breakthrough in the holder, the clamping means are associated with a short length of the holder, wherein the clamping means for fixing the sleeves act on at least one of the sleeves by a breakthrough through the clamping means Clamping movement and a relaxation movement is executable, and in which the sleeves are frictionally and / or positively held as a sleeve stack on the circumference of the holder. The advantage is that a clamping device can be used, which does not extend over the entire length of the winding spindle, as is the case with clamping devices, which clamp each sleeve individually radially.

Particularly advantageous is a variant in which the clamping means are assigned to a cantilevered side of the holder and in which an axial stop for the sleeves is provided on an opposite bearing side of the winding spindle. The arrangement at the projecting end is based on the knowledge that the structure in the region of the projecting bearing is particularly relevant for the static and dynamic rigidity of the winding spindle. By shifting the clamping device At the projecting end of the winding spindle is now more space for a rigid construction of the winding spindle available. Thus, particularly long-projecting winding spindle can be created with low bending tendency for simultaneously winding a plurality of coils.

In a preferred embodiment, therefore, the clamping device is at the projecting end of the winding spindle with one or more clamping means which exerts an axial clamping force in the direction of storage on the sleeve associated with the projecting end of the winding spindle. The clamping force acts in the axial direction and can be transferred directly to the sleeve stack for fixing all sleeves. With the help of the clamping means an axial clamping force is transmitted directly to the end face of the sleeve which is assigned to the projecting end of the winding spindle. As a result, the coaxial with the winding spindle successively plugged sleeves are axially clamped together and with the winding spindle, wherein the winding spindle has an axial stop on the storage side. Thus, it is possible to transmit to the sleeves the torque required for the winding operation.

According to a further advantageous embodiment of the invention, the clamping device is designed such that the clamping means generate at least one last sleeve, a radial clamping force. Here, the positive connection of the sleeves is used within the sleeve stack to obtain a fixation and entrainment on the circumference of the holder. The sleeves are previously pushed together to the axial stop on the circumference of the holder, and then fixed by a partial clamping. The clamping means have an advantageous effect on at least one of the sleeve. However, a partial clamping can also be achieved if several sleeves are clamped at the end of the sleeve stack of the clamping means.

In another variant of the invention, the clamping device with the aid of the clamping means on the the sleeve projecting end of the winding spindle associated with a radial clamping force to fix this sleeve, and at the same time an axial clamping force in the direction of the stop, so that the intermediate sleeves are clamped axially in the manner described above. The clamping force acting in the axial direction is transmitted by friction.

Preferably, in the latter variant, the clamping means are formed so that during the clamping operation in a first step, the sleeves are clamped axially and then in a second step, the radial clamping force is applied. These steps can be executed successively, merge into one another or be executed in reverse order. Decisive is that the friction due to the radial clamping is always high enough to apply the axial biasing force. In a reverse order in which initially one or more sleeves are clamped radially on the projecting end of the winding spindle and then the sleeve assembly is clamped axially, the clamping means required for generating the axial clamping force are preferably arranged on the bearing side of the winding spindle. Thus, the radially clamped sleeves serve as a stop for the axially clamped sleeves on the circumference of the winding spindle.

Preferably, the contact surface on which the sleeve stack bears against the axial stop is provided with a friction-increasing structure. This can be done, for example, by a rough surface or by a profiling, wherein the elevations of the profiling press into the softer structure of the sleeve end face.

In another preferred embodiment, the profiling of the contact surface is equipped with a plurality of drivers, which cooperate with a plurality of recesses in the end face of the sleeve. This allows high torques to be transmitted to the sleeves and the tube stack in particular even without axial clamping forces or with only slight axial clamping forces.

Also, the contact surface of the tensioning means, which acts on the corresponding surface of the sleeve, with a friction-improving Structure or equipped with drivers, which cooperate with recesses on the front side of the sleeve.

According to the invention, it is also provided that the end faces of adjacent sleeves have a plurality of cuts and a plurality of projections resulting thereby, which cooperate within the sleeve stack so that the torque is positively transmitted to each of the sleeves.

In an alternative embodiment, the end faces of the sleeves are provided with a friction enhancing structure which also contributes to the transmission of the torque.

A development of the invention uses between each two adjacent sleeves an intermediate ring, which ensures the transmission of torque and also ensures centering of the sleeves. For this purpose, the intermediate ring on means such as a centering diameter and abutment surfaces with a congruent shape for receiving the end faces of the sleeves.

In an alternative embodiment, the centering of the sleeves on the winding spindle is achieved in that the winding spindle is provided on its outer circumference with radially resilient fixing means.

Preferably, these resilient fixing means are formed by axially provided on the outer circumference of the winding spindle strips. It is within the ability of a person skilled in the art to design these strips so that a centric fixation of the sleeves on the winding spindle is ensured.

The clamping device of the winding spindle is designed so that the sleeves are tensioned in the energy-free state. When supplying energy from the outside, the sleeves are relaxed. According to the invention, the supply of energy to the cantilevered side of the winding spindle. This has the advantage that no supply lines are guided through the areas of the winding spindle that are relevant for the rigidity.

In order to make the space on the winding spindle for receiving the clamping device as large as possible, but without reducing the space for the stiffness-relevant structural elements of the winding spindle, particularly the development of the invention has been excellent, in which the length of the holder for holding the clamping device up extends to a bearing point of a drive shaft connected to the holder. This makes it possible to perform the drive shaft with the largest possible diameter.

Some embodiments of the winding spindle according to the invention will be described in more detail below with reference to the accompanying drawings.

Fig. 1:

einen Teilschnitt durch eine erste Variante der erfindungsgemäße Spulspindel,

Fig. 2:

eine Ansicht einer weiteren Variante der erfindungsgemäße Spulspindel,

Fig. 3:

einen Teilschnitt durch eine alternative Ausführungsform der erfindungsgemäßen Spulspindel,

Fig. 4:

eine Detailansicht eines Spannmittels,

Fig. 5:

eine Detailansicht einer alternativen Ausführungsform des Spannmittels,

Fig. 6:

ein Teilschnitt durch ein Ausführungsbeispiel einer Spannvorrichtung,

Fig. 7:

eine Ansicht einer Variante der erfindungsgemäßen Spulspindel.

Fig. 8:

eine Querschnittsansicht einer weiteren Variante der erfindungsgemäßen Spulspindel.

They show:

Fig. 1:

a partial section through a first variant of the winding spindle according to the invention,

Fig. 2:

a view of a further variant of the winding spindle according to the invention,

3:

a partial section through an alternative embodiment of the winding spindle according to the invention,

4:

a detailed view of a clamping device,

Fig. 5:

a detailed view of an alternative embodiment of the clamping means,

Fig. 6:

a partial section through an embodiment of a clamping device,

Fig. 7:

a view of a variant of the winding spindle according to the invention.

Fig. 8:

a cross-sectional view of another variant of the winding spindle according to the invention.

In FIG. 1 is a section through the winding spindle according to the invention shown. The FIG. 1 shows in the upper part of the winding spindle with deferred shown in section coils 4 in the tensioned state. The lower half is shown without coils in the relaxed state.

The winding spindle 1 has a holder 29 which is rotatably supported cantilevered on a support 47 with a bearing, not shown here and on the periphery a plurality of coaxially successively arranged sleeves 2 carries on which by the rotation of the holder 29 continuously tapered yarn to yarn layers and thus wound up into coils 4. Such winding spindle 1 are well known and commonly used in winding machines. Therefore, the decisive for the invention parts of the winding spindle will be described below.

The sleeves 2 are held as a sleeve stack 41 on the circumference of the holder 29, wherein the sleeves 2 are directly adjacent to each other with their end faces. In this embodiment, the sleeve stack 41 is formed from a total of three sleeves 2. The number of sleeves is exemplary, so usually more than ten sleeves 2 are held on a holder 29 of the winding spindle 1.

The fixation of the sleeves 2 to the holder 29 is effected by a tensioning device 7, which is arranged on a longitudinal portion of the holder 29 at the projecting end of the winding spindle 1. The clamping device 7 has a plurality of clamping means 8, which protrude with their ends from the holder 29 and act on a last sleeve 2 of the sleeve stack 41. In this example, the clamping device 7 is formed so that the sleeves 2 are tensioned by an axial clamping between the clamping means 8 on the projecting side 6 and an arranged on the bearing side 5 axial stop 11. The axial stop 11 is formed on the storage side 5 on the circumference of the holder 29.

The arrangement of the clamping device 7 in the longitudinal section of the holder 29 on the projecting side 6, it is possible to make the winding spindle 1 such that on the storage side 5 over the prior art space is free, for a higher static and dynamic rigidity the winding spindle 1. can be used. In the Usually this will be a more massive design and especially the exploitation of a larger maximum diameter of the supporting structure - which is not shown in detail in this example - be.

In the embodiment variant shown here, the clamping means 8 are designed so that it engages the sleeve 2 assigned to the projecting side 6 in a form-fitting manner on its end face. For this purpose, the clamping means 8 on a shoulder which cooperates with the end face of the sleeve 2.

In the relaxed state of the winding spindle, the clamping means 8 are moved back against the clamping direction and to a diameter which allows sliding of the sleeves 2 on the holder 29. To tighten the sleeves 2, the clamping means 8 now perform a clamping movement 9, in which the clamping means 8 are first extended to a diameter which allows a positive axial gripping of the end face of the sleeves 2 to be clamped. Immediately thereafter or in the form of merging movements, the clamping means 8 are moved in the axial direction in the direction of the storage side 5. As a result, the actual clamping operation is performed.

In the embodiment shown here, the diameter of the holder 29 decreases in the region of the clamping means 8. However, it is also possible that the holder 29 in the region of the clamping means 8 has no diameter stage, as long as the clamping means 8 are fully retracted during the expansion movement 10. The expansion movement 10 includes a radial movement of the clamping means 8 inward and successively or simultaneously a movement of the clamping means 8 in the direction of the projecting side 6. This relaxes the sleeves 2 and at the same time the clamping means 8 are moved back so far that the sleeves 2 on the Clamping means 8 can be withdrawn away.

Other variants, for example, from the front side of a shorter winding spindle 1 outstanding hook-shaped clamping means 8 are also conceivable and included in the invention.

The axial stop 11 has at the contact surface 12 to the adjacent sleeve 2 has a surface with improved friction effect. Corresponding surfaces or structures can also be provided on the clamping means 8 or between respectively adjacent sleeves 2. Also can be provided between the sleeves 2 intermediate rings, not shown here, which have corresponding surfaces or structures on the contact surfaces to the sleeve end faces.

In FIG. 2 is another variant of the winding spindle 1 from FIG. 1 shown with deferred coils 4 in plan view. The contact surface 12 of the axial stop 11 has in the axial direction a profiling 38 with a plurality of drivers 39, which cooperates with corresponding recesses 40 in the end face of the adjacent sleeve 2. The sleeve end faces 13 of adjacent sleeves 2 have a similar toothing with a plurality of notches 42 and a plurality of projections 43. The incisions 42 of the sleeves 2 cooperate with the projections 43 of the adjacent sleeve 2, so that the sleeves 2 are held in a form-fitting manner in the sleeve stack 41. On the projecting side 6, the clamping means 8 act directly on the cuts 42 in the contact surface 14 of the sleeve end face. By this positive connection high torque between the holder 29 of the winding spindle 1 and the coil 4 can be transmitted even with low axial biasing force.

FIG. 3 shows a further variant of the winding spindle according to the invention 1. As in FIG. 1 Here, too, the upper half with cut sleeves 2 shown in the tensioned state, the lower half in the relaxed state without sleeves shown. Unlike the in FIG. 1 and 2 shown variants, the axial clamping force is applied here not by form but by adhesion. To clamp the clamping means 8, the sleeve 2 on the projecting side 6 of the winding spindle 1 radially from the inside. In addition to this radial clamping force, the sleeve 2 is clamped on the projecting side 6 axially in the direction of the axial stop 11. To apply this clamping force and clamping force, the clamping means 8 during clamping and relaxing a similar movement as in FIG. 1 and 2 described by. Additionally are in FIG. 3 Fixing means 15 shown which radially center the sleeves 2 on the holder 29 winding spindle 1. This is done by resiliently yielding strips in the radial direction. A progressive characteristic of the spring ensures the radial centering.

Also shown here is a power supply 16 which is used to operate one in the following FIG. 6 shown clamping device 7 is required for driving the clamping means 8 when relaxing. This can be for example a compressed air source. For safety reasons, the clamping movement of the clamping means 8 is effected by a spring, the relaxation movement, however, by the external power supply. For this purpose, the external power supply 16 is connected at standstill of the winding spindle 1 with the projecting side 6 of the winding spindle 1 and leads to the energy required for relaxation. In this case, for example, the external power supply 16 may be connected to a doffing device, which decreases the full coils 4 after completion of the Aufspulvorganges and expires empty sleeves 2.

FIGS. 4 and 5 show again in detail the clamping means 8, which are shown in the preceding figures. It is in FIG. 4 a clamping means 8 shown that transmits an axial frictional force by a radial clamping force. In addition, the clamping means 8 has a friction increasing contact surface 14. Das in FIG. 5 shown clamping means 8 is due to a step-shaped training in a position to transmit the clamping force in the axial direction by positive engagement. The step is not necessary for clamping function, it is also conceivable that the clamping means 8 cooperates via a straight edge with the end face of the sleeve 2. The contact surface 14 acts here in any case in the axial direction with the end face of the sleeve together.

FIG. 6 shows a partial section through the projecting end of the winding spindle and the tensioning device 7 of a winding spindle according to the invention. The tensioning device 7 is arranged here directly on the longitudinal section of the holder at the end. It is one of many possible embodiments that are able to realize the clamping movement 9 and the relaxation movement 10 of the clamping means 8.

The tubular holder 29 is freely rotatably supported on the carrier 47. The holder 29 has openings 48 through which the clamping means 8 act outwardly in the direction of the sleeve, not shown here. Compressed air can be supplied via a flange 21 for relaxing, which flows via the bore 20 into a cylinder space 22 and acts on an annular piston 23. In this case, the piston 23 moves upon application of compressed air to the right, thereby biasing the spring 28. The annular piston 23 has on its outer circumference via a plurality of ramps 24 which cause a radial movement of the clamping means 8 in axial movement. In the case of a relaxation movement, the clamping means are pulled inwards. After completion of this radial movement contacted a stop 26, the clamping means 8 and pushes it also to the right, wherein the clamping means 8 a drag sleeve 27 which carries the tensioning means 8 in the axial direction, entrains. This movement is carried out until equilibrium prevails between the spring 28 and the compressed air or the tensioning means 8 or the push sleeve 27 runs against a stop. This completes the relaxation movement.

After pushing the sleeves, the connection to the power supply 16 is now disconnected, whereby the air pressure in the cylinder chamber 22 collapses. The prestressed spring 28 now pushes the piston 23 to the left, whereby due to the ramp 24, first the clamping means 8 are pressed radially outward. These clamp against the inner wall of the sleeves 2. Due to the action of the spring 28 is on the sleeve 2, an axial clamping force in the direction of in FIG. 3 shown axial stop 11 exercised.

The coordination of the radial and axial movement of the clamping means 8 is ensured by a vote of the friction conditions of the sliding sleeve 27 with the friction conditions of the piston 23. For the sake of clarity, the details have been omitted. This concerns, for example, a fuse which prevents the clamping means 8 from falling out and a spring which pulls the clamping means 8 in the relaxed state into the winding spindle.

Also, the required movement of the tensioning means 8, represented by the tensioning movement 9 and the relaxing movement 10, can be achieved in a manner equivalent to other apparatus features which can be derived by a person skilled in the art.

FIG. 7 represents a further variant of the winding spindle according to the invention. In this embodiment, the clamping device 7 is arranged on a longitudinal portion of the holder 29 on the storage side 5. On the storage side 5, a clamping means 30 is provided on a shoulder of the winding spindle 1. The clamping means 30 is implemented here in the form of an annular piston or in the form of a plurality of small pistons, which are or are introduced into a cylinder 31 and are acted upon by a compressed air supply 32 with compressed air. In the upper half of in FIG. 7 The winding spindle shown, the tensioned state is shown. In the lower half, however, the relaxed state. The clamping means 30 exerts an axial clamping force on the end face of the bearing side 5 of the winding spindle 1 associated sleeve 2, which are clamped together with the other sleeves 2 between the clamping means 30 and the pawls 33.

The pawls 33 are radially retractable and extendable, so that they can be sunk to remove the sleeves 2. For this purpose, an actuator may be provided, which is connected to the pawls 33 and is operated either together with the clamping means 30 or separately.

It is also possible to provide a means by which the pawls are indirectly actuated by the tensioning means 30. For this purpose, the pawls 33 are displaceable in a clamping movement 35 axially against a spring in the direction of the projecting side 6 to a stop, not shown here. When relaxing the tensioning means 30, the pawls 33 are pulled radially through a gate during their return movement 36 into the winding spindle. It is useful that the pawls 33 are interrupted during their return movement 36 in their movement, so that they remain in a radially retracted position. By means of a release 37, which is actuated for example by an operator after pushing the sleeves 2 onto the winding spindle 1, the return movement 36 can be continued, so that the pawls 33 extend radially again. It is advantageous to carry out the pawls 33 in such a way that the sleeves 2 can be slid onto the winding spindle 1 even in the radially extended state of the pawls 33. This is done by the in FIG. 7 shown inclined front edge of the pawls 33 achieved in conjunction with a resilient radial compliance.

In the Fig. 8 a further variant of the winding spindle according to the invention is shown in a cross-sectional view. In this variant of the winding spindle according to the invention, the tensioning device 7 extends over a length section of the holder 29 on the projecting side 6 of the winding spindle over a region exceeding the length of a sleeve. Thus, the clamping means 8 act on two arranged at the end of the sleeve stack 41 sleeves 2. Dementgegen were in the variants after Fig. 1 to 3 the tensioning means 8 are each directed to a last sleeve 2 of the sleeve stack 41.

At the in Fig. 8 illustrated embodiment, the tubular holder 29 is connected in the central region by a hub 50 with a free end of a drive shaft 46. The drive shaft 46 is coupled to a drive, not shown here. The drive shaft 46 is rotatably mounted in a bearing 45 on a hollow cylindrical support 47. The support 47 projects for this purpose on the bearing side 5 with a support end in the hollow cylindrical holder 29th

On the opposite projecting side of the holder 29, a clamping device 7 is arranged in a front longitudinal section of the holder 29. The clamping device 7 has a plurality of clamping means 8, which are designed to be displaceable in the radial direction. Here, each clamping means 8 is associated with an opening 48 in the holder 29.

On the end face on the projecting side 6 of the holder 29, a power connection 49 is provided, through which an energy supply to the tensioning device 7 takes place for releasing the tensioning means 8.

In Fig. 8 the winding spindle 1 is shown with a strained sleeve stack 41. The sleeves 2 are held in the sleeve stack 41 by a plurality of intermediate rings 44 toothed against each other, so that a torque transmission from the clamped sleeves 2 takes place within the sleeve stack to the unclamped sleeves.

The opposite to the axial stop 11 sleeve 2 has on its front side also a congruent with the profiling 38 shape with cuts and projections.

The centering rings have opposite the end faces of the sleeves 2 each contact surfaces with profilings that allow a rotation transmission. In addition, the centering rings 44 are based on a centering shoulder relative to the circumference of the holder 29, which serves in particular for centering the sleeves 2.

In order to tension the sleeve stack 41 on the circumference of the holder 29, first the sleeves 2 and the intermediate rings 44 are alternately pushed from the projecting side 6 forth on the circumference of the holder 29. The resulting sleeve stack 41 is displaced to the axial stop 11. After the sleeve stack 41 has reached its position on the circumference of the holder 29, a stress of the clamping elements 8 generated by spring forces is released by relieving the energy connection 49. The clamping elements 8 emerge from the circumference of the holder 29 and generate a radial clamping force against the inner diameter of the first two sleeves 2 on the cantilevered side of the holder 29. Now, the winding spindle can be activated to wind up the threads.

At the in Fig. 8 illustrated embodiment, the clamping device 7 is integrated in a longitudinal portion of the holder 29, which is insignificant for increasing the rigidity. In contrast, the Drive shaft 46 and the bearing 45 perform to a maximum diameter. Thus, the installation space of the bearing 45 is limited only by required wall thicknesses of the shell of the holder 29 and the carrier 47.

LIST OF REFERENCE NUMBERS

1

winding spindle

2

shell

3

yarn layer

4

Kitchen sink

5

storage page

6

cantilevered side

7

jig

8th

clamping means

9

clamping movement

10

relaxing movement

11

axial stop

12

contact area

13

Sleeve front end

14

contact area

15

fixer

16

power supply

20

drilling

21

flange

22

cylinder space

23

piston

24

ramp

25, 26

attack

27

push sleeve

28

feather

29

holder

30

clamping means

31

cylinder space

32

Compressed air supply

33

pawl

34

evasive movement

35

clamping movement

36

return movement

37

unlocking

38

profiling

39

takeaway

40

recess

41

sleeve stack

42

incision

43

head Start

44

intermediate ring

45

depository

46

drive shaft

47

carrier

48

breakthrough

49

power connection

50

hub

Claims (14)

1. A winding spindle for winding up continuously arriving threads to form bobbins (4), having a tubular holder (29), onto which a plurality of tubes (2) that serve for winding up bobbins (4) can be clamped coaxially one behind the other and which can be driven, and having a clamping arrangement (7) for fixing the tubes (2) on the circumference of the holder (29), wherein the clamping arrangement (7) has a plurality of clamping means (8) for applying clamping forces which fix the tubes (2) in a force-fitting or form-fitting manner,
   characterized in that
   an opening (48) in the holder (29) is dedicated to every clamping means (8), the clamping means (8) are assigned to a short longitudinal portion of the holder (29), with the clamping means (8) acting on at least one of the tubes (2) in order to fix the tubes (2), for which a clamping movement (9) and an unclamping movement (10) is executable by the clamping means (8) through the openings (48), and in that the tubes (2) are held in a frictional and/or form-fitting manner as a tube stack (41) on the circumference of the holder (29).
2. The winding spindle as claimed in claim 1,
   characterized in that
   the clamping means (8) are assigned to a projecting side (6) of the holder (29), and in that an axial stop (11) for the tubes (2) is provided on a mounting side (5) of the winding spindle (1).
3. The winding spindle as claimed in claim 1 or 2,
   characterized in that
   the clamping arrangement (7) is formed such that the clamping force produced by the clamping means (8) acts axially on the tube (2).
4. The winding spindle as claimed in claim 1 or 2,
   characterized in that
   the clamping arrangement (7) is formed such that the clamping force produced by the clamping means (8) acts radially on the tube (2).
5. The winding spindle as claimed in claim 1 or 2,
   characterized in that
   the clamping arrangement (7) is formed such that on actuation of the clamping means (8) first of all an axial preloading force is applied and this is followed by radial clamping of the tube (2).
6. The winding spindle as claimed in one of claims 2 to 5,
   characterized in that
   the axial stop (11) has on the mounting side a contact surface (12) on which the tube (2) assigned to the mounting side is supported, and in that the contact surface (12) has a friction-enhancing structure or a profiling (38).
7. The winding spindle as claimed in claim 6,
   characterized in that
   the profiling (38) of the contact surface (12) has a plurality of catches (39), which interact with a plurality of recesses (40) on the end side of the tube (2) or of the tube stack (41).
8. The winding spindle as claimed in one of the preceding claims 1 to 7,
   characterized in that
   the clamping means (8) have a contact surface (14) which clamps the tube (2) assigned to the projecting side (6), and in that the contact surface (14) has a friction-improving structure.
9. The winding spindle as claimed in one of the preceding claims,
   characterized in that
   the end faces of the tubes (2) have a plurality of incisions (42) which interact with a plurality of protrusions (43) on adjacent tubes (2).
10. The winding spindle as claimed in one of the preceding claims,
    characterized in that
    the end faces of the tubes (2) have a friction-improving structure.
11. The winding spindle as claimed in one of the preceding claims,
    characterized in that
    in each case an intermediate ring (44) is arranged between adjacent tubes (2) within the tube stack (41), and in that the intermediate rings (44) have means which contribute toward centering and connecting the tubes (2) on the circumference of the holder (29).
12. The winding spindle as claimed in one of the preceding claims,
    characterized in that
    the winding spindle (1) has radially resiliently yielding fixing means (15) for the radial tolerance compensation of the tubes.
13. The winding spindle as claimed in one of the preceding claims,
    characterized in that
    the clamping arrangement (7) can be connected for unclamping purposes to an energy supply (16), and in that the energy supply (16) is provided outside the winding spindle on the projecting side (6).
14. The winding spindle as claimed in one of claims 2 to 13,
    characterized in that
    the longitudinal portion of the holder (29) for holding the clamping arrangement (7) extends as far as a bearing point (45) for a driveshaft (46) connected to the holder (29).

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