CN113767057A

CN113767057A - Winding spindle

Info

Publication number: CN113767057A
Application number: CN202080029007.XA
Authority: CN
Inventors: H·瓦尔特曼; J·科瓦尔斯基; R·沃斯
Original assignee: Oerlikon Textile GmbH and Co KG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 2019-04-17
Filing date: 2020-04-06
Publication date: 2021-12-07
Also published as: JP7447145B2; WO2020212181A1; JP2022529659A

Abstract

The invention relates to a winding spindle for winding a plurality of threads to form bobbins, having a protruding bobbin spindle (2) for receiving a plurality of hollow-cylindrical winding bobbins (3.1-3.4). The winding bobbins (3.1-3.4) can be continuously pushed onto the bobbin core shaft (2) and can be axially fixed relative to a bobbin stop (4) on the circumference of the bobbin core shaft (2) by means of a clamping mechanism (5). In order to achieve a secure holding of a plurality of winding tubes (3.1-3.4) on the circumferential surface of the bobbin core (2), each of the winding tubes (3.1-3.4) has a fastening element (7) on at least one end face (6.1,6.2), which is configured to be elastically deformable for radially tensioning the winding tube (3.1-3.4) on the circumferential surface of the bobbin core (2).

Description

Winding spindle

The invention relates to a winding spindle for winding a plurality of threads to form bobbins according to the preamble of claim 1.

A winding spindle of the generic type for winding a plurality of yarns to form bobbins is disclosed by WO2010/094553a 1.

In the melt-spinning production of synthetic yarns, the yarns produced in the spinning station are usually wound next to one another to form bobbins. Each bobbin is produced on the circumferential surface of a winding bobbin, a plurality of winding bobbins are supported on the circumferential surface of a winding spindle in a stacked manner and are driven by the winding spindle at a predetermined circumferential speed. It is usual here to connect the winding bobbin fixedly to the circumference of the winding spindle in order to ensure that the winding bobbin is held securely at a maximum yarn speed of, for example, 6000 m/min and a maximum bobbin weight of, for example, 25 kg. It is therefore common to fix the winding bobbin to the circumference of the winding spindle by means of a clamping mechanism. Such a clamping mechanism is usually integrated in the winding spindle and acts on each of the winding bobbins.

A common type of winding spindle has a clamping mechanism which acts only on the winding bobbins assigned to the free ends of the winding spindle in order to thereby jointly fix adjacent winding bobbins in a stack of bobbins on the circumferential surface of the winding spindle. For this purpose, the winding bobbins are tensioned against one another in an axial manner to produce the required holding force. In the case of a winding spindle which projects far and accommodates a plurality of winding tubes one after the other, a relatively large axial force must therefore be applied to secure the winding tube, which leads to high loads acting on the winding tube.

The object of the invention is therefore to improve a winding spindle of the generic type in such a way that a plurality of winding tubes can be firmly fixed to the circumferential surface of the bobbin core of the winding spindle.

Another purpose of the present invention is to obtain a winding spindle of the generic type which is substantially independent of the inner clamping member.

According to the invention, this object is achieved in that each of the winding bobbins has a fastening element on at least one end face, which is designed to be elastically deformable for radially tensioning the winding bobbin on the circumferential surface of the bobbin core.

Advantageous developments of the invention are defined by the features and feature combinations of the respective dependent claims.

The invention has the particular advantage that each of the winding bobbins which are more or less axially tensioned in the bobbin stack is held on the circumferential surface of the bobbin core by radial tensioning. This results in a centering capability on the one hand and, on the other hand, an automatic tensioning of the winding tube without additional clamping mechanisms. Complex clamping devices in the bobbin spindle can thus be avoided, so that the bearing cross section of the bobbin spindle widens to the inner diameter of the winding tube. Axial tensioning of the stack of bobbins is only required in order to deform the fixing, which then causes radial tensioning in order to fix each of said winding bobbins.

In a first advantageous development of the invention, the fastening element is formed by a rubber ring which is fastened in a groove on the end face of the winding tube. Because of the material properties of the rubber ring, even a minimal axial displacement results in a large clamping force acting radially between the winding bobbin and the bobbin spindle.

In order to produce a radial tensioning on each end face of the winding tube in the tube stack, the development of the invention is particularly advantageous in that the winding tube has a separate rubber ring on both end faces, which rubber ring projects beyond the end faces of the winding tube in the relaxed state. The winding bobbins in the bobbin stack are pushed together and can therefore already advantageously be used to generate a radial clamping force.

In order to be able to hold the winding bobbins in the bobbin stack on the circumferential surface of the bobbin spindle with a specific axial prestress, it is also provided that the winding bobbins have the same configuration and that the clamping means are formed by a clamping ring on the circumferential surface of the bobbin spindle, which clamping ring is assigned to the winding bobbin on the free end of the bobbin spindle. By fixing the clamping ring on the circumferential surface of the bobbin mandrel, the axial minimum pre-tightening force acting on the bobbin stack required for keeping the winding bobbin radially tight is maintained.

According to a further advantageous development of the invention, the fastening means is formed by a plurality of elastic clamping tongues on the end face of the winding tube, which are arranged so as to be distributed uniformly over the circumference of the winding tube and are assigned to the circumference of the bobbin spindle. Such a clamping tongue on the end face of the winding tube offers the particular advantage that it can be arranged directly in the end face. The fastening element and the winding tube are then formed as an integral component without additional connections.

In order to produce a radial tensioning of the winding tube which is uniform over the entire circumference of the bobbin spindle, it is also provided that the axially projecting clamping tongues of the winding tube are arranged in the form of ramps and by means of corresponding clamping cones and can be tensioned about the circumference of the bobbin spindle. The radial tensioning of the winding bobbin can thus be achieved substantially without any axial pretensioning.

The clamping cones are advantageously arranged on opposite end faces of the winding tube, so that adjacent tubes in a stack of tubes can be combined with the clamping cones and the clamping tongues.

In order to tension the winding tube arranged at the free end of the bobbin spindle, the clamping cone is arranged on a clamping ring on the circumferential surface of the bobbin spindle, wherein the clamping ring is used as a clamping mechanism for the winding tube on the free end of the bobbin spindle. It is relevant here that the winding tube in the tube stack is held in a radially tensioned manner by the clamping tongues and the clamping cones.

For this purpose, the clamping ring is preferably held on the circumferential surface of the bobbin spindle by a switchable locking mechanism. Locking and unlocking the clamping ring on the circumference of the bobbin spindle can then be achieved in a simple manner.

A further alternative embodiment of the invention is provided by the development in which the fastening element is formed by a plurality of clamping tongues which are arranged at a distance from one another on the end face of the winding tube and can be tensioned by a plurality of opposing clamping projections on the end face of the adjacent winding tube. This results in a plurality of clamping zones which are arranged so as to be distributed around the bobbin spindle and have a firm holding effect even in the case of tolerance differences between the clamping tongues and the clamping projections.

In this case, the clamping tongues and the clamping projections are each formed offset with respect to one another on both end faces of the winding tube. The end faces of the winding tube can then be combined with one another in any desired manner in order to maintain the self-generated radial tension in the case of an axial displacement.

A further advantage of the alternating arrangement of the plurality of clamping tongues and clamping projections on the end face of the winding tube is that the resulting radial tension is substantially maintained even when the tube shaft is not axially prestressed. The winding tube is held in place by a self-locking action between the clamping tongue and the clamping projection in order to be radially tensioned on the circumferential surface of the bobbin mandrel, even in the absence of axial stress.

In order to fix the winding tube on the free end of the bobbin core shaft, the clamping mechanism is formed by a cover unit which is provided with a plurality of adjustable clamping blocks, wherein the clamping blocks can be moved in the cover unit between an engagement clamping position and a separation relaxation position by means of the adjusting mechanism.

In order to achieve a secure holding of the winding tube, which has a plurality of clamping tongues and a plurality of clamping projections, on the tube stop of the bobbin spindle, it is further provided that the tube stop is formed by an annular stop having a plurality of clamping tongues and clamping projections which are arranged offset with respect to one another and are arranged in an identical manner to the clamping projections and clamping tongues of the winding tube. It is thus ensured that each winding tube is held on the bobbin spindle at its end face by radial tensioning.

In order to allow the winding bobbin to be removed from the bobbin core shaft at the end of the winding process, in which the yarn on the winding bobbin is already wound to form a bobbin, the following development of the invention is provided, in which the winding bobbin has a radially encircling doffing slot on the circumferential surface, which is assigned to one of the end faces. For example, an operating robot or doffer can then be used to doff the winding bobbin with the bobbin.

In order to ensure that the winding tube is in a predetermined position when the winding tube is pushed onto the bobbin core and to prevent any rotation of the winding tube, the following development of the invention is particularly advantageous, wherein the winding tube has a plurality of axial grooves which are designed to be distributed over the inner diameter and interact with longitudinal webs on the circumferential surface of the bobbin core. The positive connection between the winding bobbin and the bobbin spindle is then already achieved when the winding bobbin is pushed on.

The winding spindle according to the invention is then particularly suitable for accommodating a plurality of winding bobbins by means of a long projecting bobbin spindle, which are realized as self-clamping by means of their fastening elements. No complicated clamping means are required. The axial movement for causing the deformation must be maintained only at the end of the bobbin spindle by the tensioning mechanism.

The invention will be explained in more detail below by means of several embodiments of a winding spindle according to the invention with reference to the accompanying drawings, in which:

fig. 1.1 and 1.2 show schematically in several views a first embodiment of a winding spindle according to the invention;

fig. 2 schematically shows a cross-sectional view of the winding bobbin according to the embodiment of fig. 1.1 and 1.2;

fig. 3.1 and 3.2 show schematically in several views a further embodiment of the winding spindle according to the invention;

fig. 4 schematically shows a cross-sectional view of the winding bobbin according to the embodiment of fig. 3.1 and 3.2;

fig. 5.1 and 5.2 schematically show views of a further embodiment of the winding spindle of the invention; and

fig. 6 schematically shows a cross-sectional view of the winding bobbin according to the embodiment of fig. 5.1 and 5.2.

A first exemplary embodiment of a winding spindle according to the invention is shown in the various views in fig. 1.1 and 1.2. Fig. 1.1 shows a longitudinal view, while fig. 1.2 shows a partial view of a radially tensioned winding tube. The following description applies to both figures unless any one of them is explicitly mentioned.

The winding spindle 1 is schematically shown in fig. 1.1. Only those parts of the winding spindle 1 which are relevant to the invention are shown here. The winding spindle 1 then has a long projecting bobbin spindle 2, which is connected to a drive shaft, not shown in greater detail here. For this purpose, the bobbin spindle 2 is tubular and is rotatably mounted on a support, which is not shown in greater detail here.

The bobbin spindle 2 has a bobbin stop 4 at one end. A plurality of bobbins is held on the circumferential surface of the bobbin spindle 2, of which only bobbins 3.1 to 3.4 are shown in fig. 1.1. Each of the winding tubes 3.1 to 3.4 has the same configuration. Reference is also made to fig. 2 for explaining the winding bobbin 3.1-3.4.

Fig. 2 schematically shows a cross-sectional view of one of the winding tubes 3.1 to 3.4.

The winding bobbin according to fig. 2 has a hollow-cylindrical tube body 3. The tubular body 3 has two opposite end faces 6.1 and 6.2. A groove 8 is formed in each end surface 6.1,6.2, respectively. The groove 8 is defined by an inner diameter and a cutting depth within the tubular body 3. An elastically deformable fixing element 7 is arranged in each recess 8. The fastening element 7 is formed here by an elastic rubber ring 7.1. The rubber rings 7.1 arranged on the end faces 6.1 and 6.2 are dimensioned with respect to their axial extent such that the rubber rings 7.1 project over the end faces 6.1 and 6.2 of the tube body 3.

A radially encircling drop groove 19 is formed on the circumference of one of the end faces 6.2.

Fig. 1.1 and 1.2 show the winding tube 3.1 to 3.4 in a tensioned state. For this purpose, the winding bobbins 3.1 to 3.4 are continuously pushed onto the bobbin spindles 2 and are tensioned against one another in an axial manner. The rubber rings 7.1 on the end faces 6.1 and 6.2 are compressed here. Due to the incompressibility of the rubber ring 7.1, a clamping force acting radially between the winding bobbin 3.1 to 3.4 and the bobbin core 2 is generated, which at the same time is associated with a very high level of rigidity with respect to radial fixing.

For this purpose, the joint between two adjacent winding tubes 3.1 and 3.2 is schematically illustrated in the cross-sectional view of fig. 1.2.

The winding bobbins 3.1 and 3.2 are coupled against, deforming the opposite rubber ring 7.1. The distance formed by the recesses 8 on the end faces 6.1,6.2 is then completely filled up to the circumference of the bobbin spindle 2 by the rubber ring 7.1. The effective clamping force and the effective rigidity for fixing the winding bobbins 3.1 and 3.2 can be designed here in advance by the dimensioning of the rubber ring 7.1 and by the dimensioning of the recess 8. Radial tensioning of the bobbins 3.1 to 3.4 on the circumferential surface of the bobbin spindle 2 is thus achieved.

As is evident from the illustration in fig. 1.1, the first winding bobbin 3.1 is moved axially by its end face 6.1 toward the bobbin stop 4. In this connection, the deformation of the rubber ring 7.1 on the end face 6.1 of the winding bobbin 3.1 can be achieved by the bobbin stop 4.

The last winding bobbin 3.4 at the opposite free end of the bobbin spindle 2 is assigned a clamping mechanism 5. The clamping mechanism 5 is realized in this embodiment by a clamping ring 9. The clamping ring 9 can be held on the bobbin spindle 2 by a screw connection or clamping. It is relevant here that the clamping ring 9 holds the bobbin stack formed by the winding bobbins 3.1-3.4 in axial abutment.

In order to remove the winding tube 3.1 to 3.4, each of the winding tubes 3.1 to 3.4 has a drop groove 19 at the end face 6.2. The doffing slot 19 is embodied radially around the circumference of the winding bobbin 3.1-3.4 and is adapted to doff from the bobbin spindle 2 in an auxiliary device.

The fact that the fixing element 7 is embodied as a rubber ring 7.1 results in that the winding bobbin 3.1-3.4 can be reused after each use. Such winding bobbins 3.1 to 3.4 can then be used several times to fasten to a bobbin spindle and to accommodate a bobbin.

Fig. 3.1 and 3.2 show various views of a further exemplary embodiment of a winding spindle according to the invention. Fig. 3.1 shows the winding spindle in a longitudinal section, and fig. 3.2 shows the winding spindle schematically in a partial section of two adjacent winding tubes.

The embodiment according to fig. 3.1 and 3.2 is substantially identical to the above-described embodiment, so that only the differences are explained here, and reference is made to the above description.

In the exemplary embodiment shown in fig. 3.1 and 3.2, a plurality of bobbins 3.1 to 3.4 are held on the circumferential surface of the bobbin spindle 2, wherein the bobbins 3.1 to 3.4 each have a plurality of clamping tongues 7.2 as fastening elements 7 on the end face 6.2. For the purpose of explaining the winding tubes 3.1 to 3.4, reference is additionally made here to fig. 4.

One of the winding bobbins 3.1 to 3.4 is schematically shown in the cross-sectional view of fig. 4. Since the winding tubes 3.1 to 3.4 have the same embodiment, the description applies to all winding tubes.

The winding bobbins 3.1 to 3.4 each have a hollow-cylindrical tube body 3. The tubular body 3 has a fastening element in the form of a plurality of clamping tongues 7.2 at the end face 6.2. The clamping tongues 7.2 are assigned to the inner contour of the tubular body 3. The clamping tongue 7.2 is beveled in the axial direction and is defined by a diameter step in the tubular body 3. The clamping tongue 7.2 is designed to be elastic by means of an expansion joint 22 on the end face 6.2. The clamping tongues 7.2 then form cutouts in the outer contour of the tubular body 3. Free punched-out cuts 27 extending to the telescopic joints 22 are formed between the clamping tongues 7.2, respectively.

The clamping cones 10 are arranged on the opposite end face 6.1 in the inner contour of the tube body 3. The clamping cone 10 is adapted to the slope and diameter of the opposing clamping tongues 7.2 in such a way that elastic deformation of the clamping tongues 7.2 occurs when a plurality of winding tubes are joined to each other. The clamping cone 10 is delimited on the inside by a diameter step 28 and is preferably realized with a slit.

As can be seen from the illustrations in fig. 3.1 and 3.2, the winding tubes 3.1-3.4 are joined to one another in the axial direction to form a tube stack, so that the clamping tongues 7.2 on the mutually opposite end faces 6.1 and 6.2 of the two winding tubes interact with the clamping cone 10.

To this end, fig. 3.2 shows a cross-sectional view of the joint between two adjacent winding tubes 3.1 and 3.2. The bobbins 3.1 and 3.2 are preferably joined to one another by means of defined stops between the end faces 6.1 and 6.2. The clamping cone 10 on the end face 6.1 of the winding tube 3.2 acts here on the clamping tongue 7.2 on the end face 6.2 of the winding tube 3.1. As a result, the clamping tongues 7.2 are pressed against the circumferential surface of the bobbin spindle 2. Radial tension between the winding bobbins 3.1, 3.2 and the bobbin spindle 2 is then produced.

As can be seen from the illustration in fig. 3.1, the bobbin stop 4 has a stop cone 23, onto which the clamping cone 10 can be pushed. A clamping mechanism 5 in the form of a clamping ring 12 is held on the circumferential surface of the bobbin spindle 2 at the opposite free end of the bobbin spindle 2. The clamping ring 12 has a clamping cone 12.1 which interacts with the clamping tongue 7.2 of the winding tube 3.4. In order to hold the clamping ring 12 in place to fix the axial displacement of the stack of bobbins 3.1-3.4, the clamping ring 12 interacts with the locking mechanism 13. Here, the locking mechanism 13 is formed in an exemplary manner by a plurality of clamping pins 14 which are guided so as to slide essentially radially within the bobbin spindle 2. An actuating mechanism 15 which can be guided to and fro at the projecting actuating end 24 by manual or automated operation is arranged in the bobbin spindle 2. Here, the clamping pin 14 is guided between the locked position and the unlocked position by an actuating ramp 25 of the actuating mechanism 15.

For doffing the winding tubes 3.1 to 3.4, each of the winding tubes 3.1 to 3.4 has a doffing slot 19 on at least one of the end faces 6.2. The bobbins that have been wound onto the circumferential surfaces of the winding bobbins 3.1 to 3.4 can then be doffed by manual or automated operation of the auxiliary device.

A further embodiment of the device according to the invention is schematically shown in the various views of fig. 5.1 and 5.2. Fig. 5.1 schematically shows a longitudinal section and fig. 5.2 schematically shows a partial view.

The exemplary embodiment according to fig. 5.1 and 5.2 also shows a winding spindle 1, which is designed essentially identically to the exemplary embodiment described above. The plurality of winding bobbins 3.1 to 3.4 are radially tensioned on the circumferential surface of the bobbin core 2 of the winding spindle 1 with respect to the bobbin core 2 by elastically deformable fastening elements 7 on the end faces 6.1,6.2 of the winding bobbins 3.1 to 3.4. For this purpose, the winding tube 3.1-3.4 has a plurality of clamping tongues 7.3 as fastening elements 7 on its end faces 6.1, 6.2. For the purpose of explaining the winding tubes 3.1-3.4, reference is also made here to fig. 6.

Fig. 6 schematically shows an exemplary embodiment of the winding bobbin 3.1 to 3.4 in a cross-sectional view and in a side view. The winding tubes 3.1 to 3.4 have the same embodiment and each have a tube body 3. The tubular body has a plurality of axially projecting clamping tongues 7.3 on the end face 6.2, which are designed to be elastic and serve as fastening means 7 for producing a radial tensioning. For this purpose, the clamping tongue 7.3 faces the inner contour of the tube body and has a slightly conical shape towards the outside. The clamping tongues 7.3 on the end face 6.2 are designed to be distributed around at a predetermined mutual distance. The clamping projections 11 are each held on the end face 6.2 with an intermediate distance between two adjacent clamping tongues 7.3. The clamping bead 11 on the end face 6.2 has an inner contour which is adapted to the clamping tongue 7.3 in order to produce a deformation of the clamping tongue 7.3 by the clamping bead 11 when the opposing end faces are joined to one another.

The level of the clamping force can be adjusted individually as a result of the geometric shaping, i.e. thickness, length and angle, of the clamping projection 11 and of the clamping tongue 7.3.

The opposite end face 6.1 of the tubular body 3 is then also designed with a plurality of alternating clamping tongues 7.3 and clamping projections 11. The clamping projections 11 and the clamping tongues 7.2 on the end faces 6.1 and 6.2 are also arranged offset in relation to their angular position in such a way that, when several winding tubes are joined to one another, one clamping tongue 7.3 interacts with one clamping projection 11 of the respectively opposite winding tube.

In the exemplary embodiment shown in fig. 5.1 and 5.2, the winding bobbins 3.1 to 3.4 are axially joined to one another up to a stop. In this position, the clamping projections 11 are each located adjacent to a clamping tongue 7.3, so that each winding tube 3.1 to 3.4 is held in a radially tensioned manner on the circumferential surface of the bobbin spindle 2.

Fig. 5.2 schematically shows the situation of adjacent winding tubes 3.1 and 3.4 for the purpose of initiating the self-clamping action. As can be seen from the illustration in fig. 5.2, the clamping bead 11 on the end face 6.1 of the winding tube 3.2 interacts with the lower clamping tongue 7.3 on the end face 6.2 of the winding tube 3.2. Because of the conical shape of the clamping tongue 7.3, a deformation, in this case a curvature, is produced on the clamping tongue 7.3 by the clamping projection 11, which leads to a radial tensioning in relation to the circumferential surface of the bobbin spindle 2.

As can be seen from the illustration in fig. 5.1, the bobbin stop 4 of the bobbin spindle 2 is assigned an annular stop 26. The annular stop 26 has an equivalent arrangement of the clamping tongue 7.3 and the clamping projection 11 with respect to the end face 6.1 or 6.2 of the first winding tube 3.1. The annular stop 26 can be glued to the circumferential surface of the bobbin spindle 2 or held on the circumferential surface of the bobbin spindle 2 by an interference fit.

To radially tension the winding bobbin 3.1 to 3.4, the winding bobbin 3.1 to 3.4 is pushed continuously in the axial direction up to the stop. Here, no axial tensioning of the bobbin stack is required. The resulting radial tension of the winding bobbins 3.1 and 3.2 is stable after the winding bobbins 3.1-3.4 have been pushed together. In this connection, the free end of the last winding tube 3.4 is to be fixed radially by the clamping mechanism 5.

As can be seen from the illustration in fig. 5.1, a cover unit 16 is arranged at the free end of the bobbin spindle 2. The cover unit 16 has a plurality of radially displaceable clamping blocks 17 for tensioning the clamping tongues 7.3 of the last winding tube 3.4. The clamping block 17 is coupled to an adjustment mechanism 18. The adjustment mechanism 18 is actuated for a plurality of functions by actuating the cover unit 16 in the axial direction and by rotating the cover unit 16. In the situation shown in fig. 5.1, the cover unit 16 is in the tensioned state, in which the clamping shoe 17 acts on the clamping tongue 7.3 of the winding tube 3.4.

To be released, the cover unit 16 is axially displaced from the bobbin spindle 2. The clamping block 17 is relaxed in the retracted position and enters the inner position. The cover unit 16 is then guided back into the starting position by means of the adjusting mechanism 18. The clamping blocks 17 are retracted and the winding bobbins 3.1 to 3.4 can be dropped off the bobbin spindle 2 via the respective doffing slots 19.

In order to be tensioned, the cover unit 16 is pulled out again, the clamping blocks 17 being moved outward by the adjusting mechanism 18 in order to clamp the respective clamping tongues 7.3 of the winding tube 3.4 when the cover unit 16 is retracted into the starting position. The activation of the cover unit 16 can be performed manually or by a doffer. The number of clamping blocks 17 in the cover unit 16 is related to the number of clamping tongues 7.3 on the winding bobbin. In this connection, the winding tube 3.4 at the free end of the bobbin spindle 2 can advantageously be radially tensioned by means of a clamping shoe 17 as the tensioning means 5.

In order to obtain a desired centering guidance of the winding bobbins 3.1 to 3.4 on the circumferential surface of the bobbin core 2 and also to avoid any rotation of the winding bobbins, each of the winding bobbins 3.1 to 3.4 may have a plurality of axial grooves through the winding bobbin. Fig. 6 shows an embodiment for this. A plurality of axial slots 20 are formed on the inner profile of tubular body 3. The axial groove 20 extends completely through the tubular body 3 from the end face 6.1 to the end face 6.2. Such axial grooves 20 interact with longitudinal webs on the circumferential surface of the bobbin spindle 2. For this purpose, the longitudinal webs can be designed to project upwards on the circumference of the bobbin spindle 2 in order to be able to receive the winding bobbins 3.1 to 3.4 via the corresponding axial grooves 20. The longitudinal web 21 is schematically shown in fig. 5.1.

The embodiment of the winding spindle according to the invention as shown in fig. 1 to 6 shows only a few of the possible configurations for arranging the fixing elements on the end faces of the winding tubes. It is relevant here that the fastening means for generating the radial tensioning are designed to be elastically deformable and that the deformation is generated by an axial movement of the winding tube. Other shapes are therefore possible in terms of construction, when the fastening element is designed as a rubber ring.

Claims

1. Winding spindle for winding a plurality of threads to form a bobbin, having a projecting bobbin spindle (2) for accommodating a plurality of hollow cylindrical winding bobbins (3.1 to 3.4), the winding bobbins (3.1,3.4) being able to be continuously pushed onto the bobbin spindle (2) and being axially fixable by means of a clamping mechanism (5) relative to a bobbin stop (4) on the circumferential surface of the bobbin spindle (2), characterized in that each winding bobbin (3.1 to 3.4) has a fixing element (7) on at least one end face (6.1,6.2), and in that the fixing element (7) is configured to be elastically deformable for radially tensioning the winding bobbin (3.1 to 3.4) on the circumferential surface of the bobbin spindle (2).

2. Winding spindle according to claim 1, characterized in that the fixing piece (7) is formed by a rubber ring (7.1) which is fixed in a groove (8) on the end face (6.1,6.2) of the winding bobbin (3.1).

3. Winding spindle according to claim 2, characterized in that the winding tube (3.1) has a rubber ring (7.1) on both end faces (6.1,6.2), which rubber ring protrudes beyond the end faces (6.1,6.2) of the winding tube (3.1) in the relaxed state.

4. The winding spindle according to claim 2 or 3, characterized in that the winding bobbins (3.1-3.4) have the same configuration, wherein the clamping mechanism (5) is formed by a clamping ring (9) on the circumferential surface of the bobbin spindle (2), the clamping ring (9) being assigned to a winding bobbin (3.4) on a free end of the bobbin spindle (2).

5. The winding spindle according to claim 1, characterized in that the fixing element (7) is formed by a plurality of elastic clamping tongues (7.2) on the end faces (6.1,6.2) of the winding bobbin (3.1), the elastic clamping tongues (7.2) being arranged so as to be evenly distributed over the circumference of the winding bobbin (3.1) and being assigned to the circumference of the bobbin spindle (2).

6. The winding spindle according to claim 5, characterized in that the axially projecting clamping tongues (7.2) of the winding tube (3.1) are configured ramp-like and can be tensioned against the circumference of the bobbin spindle (2) by means of a respective clamping cone (10).

7. The winding spindle according to claim 6, characterized in that the clamping cones (10) are formed on opposite end faces (6.1,6.2) of the winding bobbin (3.1) and/or on clamping rings (12) arranged on the circumference of the bobbin spindle (2), a clamping ring (12) as a tensioning means (5) being assigned to the winding bobbin (3.4) on the free end of the bobbin spindle (2).

8. The winding spindle according to claim 7, characterized in that a switchable locking mechanism (13) is assigned to the clamping ring (12), which locking mechanism (13) is arranged on a free end of the bobbin spindle (2).

9. The winding spindle according to claim 1, characterized in that the fixing element (7) is formed by a plurality of clamping tongues (7.3) which are arranged at a distance from one another on the end faces (6.1,6.2) of the winding bobbins (3.1) and can be tensioned by a plurality of opposing clamping projections (11) on the end faces (6.1,6.2) of adjacent winding bobbins (3.2).

10. The winding spindle according to claim 9, characterized in that a plurality of clamping tongues (7.3) and a plurality of clamping protrusions (11) are each designed to be offset from each other on both end faces (6.1,6.2) of the winding tube (3.1).

11. Winding spindle according to claim 9 or 10, characterized in that the clamping mechanism (5) is formed by a cover unit (16) which has a plurality of adjustable clamping blocks (17) and is arranged on one end of the bobbin spindle (2), wherein the clamping blocks (17) can be moved between an engaged clamping position and a disengaged relaxed position by means of an adjusting mechanism (18).

12. Winding spindle according to one of claims 9 to 11, characterized in that the bobbin stop (4) is constituted by an annular stop (26) having a plurality of clamping tongues (7.3) and clamping protrusions (11), the plurality of clamping tongues (7.3) and clamping protrusions (11) being arranged offset to one another and being constituted in a manner equivalent to the clamping protrusions (11) and the clamping tongues (7.3) of the winding bobbin (3.1).

13. Winding spindle according to one of the preceding claims, characterized in that the winding tube (3.1) has a radially encircling doffing slot (17) assigned to one of the end faces (6.1,6.2) on the circumferential face.

14. The winding spindle according to any one of the preceding claims, characterized in that the winding tube (3.1) has a plurality of axial grooves (20) which are configured to be distributed on an inner diameter and interact with longitudinal webs (21) on the circumferential surface of the bobbin spindle (2).