EP2832904A1 - Spinning machine and a false twisting device - Google Patents

Abstract

A spinning machine, in particular a ring spinning machine, has a plurality of juxtaposed units (1), each unit (1) comprising a drafting device for warping a sliver and a spinning device for twisting the warped sliver to a yarn (3) and one between the drafting device and the spinning device having arranged false twisting device (9). The false twisting device (9) has at least one belt (11) driven by a drive device, which runs essentially transversely to the yarn (3) and the yarn (3) has two opposite runs (4, 5) of the belt (s) (FIG. 11) wraps around in particular z-shaped. The at least one belt (11) extends between the drive device and a deflection device along a plurality of the units (1) of the spinning machine (10). The belt (11) is supported by at least one support roller (17) and the at least one support roller (17) is mounted with axial freedom.

Description

The present invention relates to a spinning machine, in particular a ring spinning machine, with a plurality of juxtaposed units, each unit having a drafting device for warping a sliver and a spinning device for rotating the warped sliver to a thread and arranged between the drafting and the spinning device false twisting device with at least a driven with a drive device belt which extends substantially transverse to the thread and the thread two opposite strands of the belt / s sails in particular z-shaped and a corresponding false twist device which can be attached to a spinning machine to a spinning machine according to the invention to obtain.

From the WO 2010/015185 A1 a spinning machine is known in which between a drafting device, on which the sliver is warped and a coil on which the sliver is wound, a false twist device is arranged. The false twist device is according to an embodiment of the local disclosure of a single belt, which is driven by a drive device. Upper and lower run of a belt are driven in opposite directions. The yarn contacted the two Riementrums either punctiform ( FIG. 4 ), when the belts are arranged directly next to each other. In another embodiment ( FIG. 3 ), the straps are spaced apart and extend substantially vertically one above the other in the opposite direction. The thread wraps in this embodiment, the belt with an angle of about 90 °. In the embodiments according to the Figures 1-7 the false twist device is formed from a single belt. The two Riementrums have the same amount of speed, but they are running in the opposite direction. While in these embodiments, the influence of the false twist device by different shapes, Speeds or arrangements of the two beltrums of the single belt is very limited, is in the further embodiment according to FIG. 8 or in the embodiment according to FIG. 9 a false twist device with two belts provided. In this case, however, the belts are arranged in a circle, wherein the thread is located between the two belts. The execution according to FIG. 1 has the disadvantage that the belt is indeed guided laterally and in its vertical arrangement, an adjustment of the strands to each other but not or only very expensive possible. In the execution after FIG. 7 the leadership of the belt is very strong. An adaptation to constructional tolerances or wear of the belt is not possible.

The object of the present invention is therefore to provide a spinning machine and a false twist device with which a plurality of spinning units of a spinning machine can be operated. The false twisting device for the spinning machine should be easy to retrofit to an existing spinning machine, which still has no such false twist device and be very flexible in their application.

The object is achieved with a spinning machine according to claim 1 and with a false twist device, which can be arranged on such a spinning machine with the features of the corresponding independent claim.

A spinning machine according to the invention has a plurality of juxtaposed spinning units. A suitable spinning machine is, for example, a ring spinning machine. Each spinning unit includes a drafting device for warping a sliver and a spinning device for twisting the warped sliver into a yarn. Between the drafting and the spinning device a false twist device is arranged. The false twist device has friction surfaces, which run essentially transversely to the thread and contact it. The velocity vectors the friction surfaces are substantially opposite to each other and extend approximately transversely to the longitudinal axis and direction of the thread. The false twist device has at least one belt driven by a drive device, which runs essentially transversely to the yarn. The thread wraps around two opposite runs of the belt (s), in particular z-shaped. The friction surfaces of the false twist device consist for example of the surface of a plastic belt. When the thread is inserted correctly, the belt or its run is wrapped in particular in a Z-shape by the thread, so that the two oppositely directed components of movement of the belt strands touch the thread. Due to the fact that the two friction surfaces act on both sides of the thread as a result of the Z-shaped loop, a twisting of the thread or its outer fibers is effected.

The at least one belt extends between the drive device and a deflection device along several of the units of the spinning machine. Several units form part of the length of the spinning machine. The belt is supported by at least one support roller and the at least one support roller is supported with axial freedom.

The belt or the belt rums of the false twist device is / are thus guided along several of the spinning units of the spinning machine. The support of the belt ensures that it is in the predetermined vertical position. This is particularly important because the position of the pulling strand to the position of the sliding strand is essential for the swirl effect on the yarn. By the one hand, rigid storage in the vertical direction and the flexible storage of the belt in the horizontal direction, the belt or its strand can optimally align and acting on him forces of the thread, the other belt guides, the tension of the belt and the tolerances in the cultivation of Balance the false twisting device with the spinning machine. The false twist device is easy to retrofit with this support device and robust in operation. In this way, a very simple false twist device is created, which can either be produced and delivered immediately together with the spinning machine or can also be subsequently grown on the spinning machine.

It can be used either a single belt, the pulled strand in one direction and the towed strand runs in the other direction and each is wrapped by the thread. The belt, which is guided along several of the units of the spinning machine, requires only one drive for several spinning units. But it can also be provided that several separate belts are used. In this case, a first belt can be guided and driven along several units and form the first looped belt. The second belt can either also be guided along several units of the spinning machine or it can also be provided per spinning unit. The two belts can also be assigned to a different number of spinning units. Through this different length versions of the belt, the cost of the construction of the false twisting device can indeed be higher, but it is also possible with respect to a greater variability. The setting on different spinning units.

In an advantageous embodiment of the invention, at least one of the belts, preferably a plurality of belts, is arranged along an entire section of the spinning machine with a plurality of spinning stations, or along the entire spinning machine. In a sectional construction thus from one section to section different setting of the belt is possible. The section thus forms one of the mentioned sections.

In order to keep the effort for the arrangement of the false twisting device as low as possible, it is advantageous if both Riementrums run along the entire spinning machine and only need a drive device. But it can also be provided several independent belt drives and belts.

In order to keep the effort for the arrangement of the spinning device even lower, it is particularly advantageous if the at least one belt, preferably both belts or belt pulleys, are guided around the entire spinning machine. The spinning machines, which are constructed on two sides in most cases, d. H. Spinning units are arranged on each side of the slitting machine can thus be equipped with only two belts with a false twisting device for all spinning stations. Alternatively, the at least one belt, preferably both belts, can also be guided around a section such that the opposing spinning units of one section are each provided with a false twist device with at least two belts. Depending on the design, it is also possible that one or both belts are guided around several sections of the spinning machine.

Advantageously, the at least one belt runs along one side of the spinning machine. On the other side of the spinning machine another belt is arranged. Both belts can be connected to an overdrive so that only one motor is needed to drive both belts. Of course, the drive can also be done with at least two separate motors.

It is particularly advantageous if the two belts or beltroms are arranged substantially in a horizontal plane. The fact that the thread is supplied from the top of the drafting system and continues down to the coil, a safe wrapping of the belt or Riementrums can be achieved hereby. The false-twist effect, which can thereby be introduced into the thread, is thus largely constant. Preferably, each run of the belt or belts is supported in a separately mounted support roller. This is an optimal storage or support for the strand given, even if the one strand should have a more or less different speed compared to the other strand. Different speeds can arise on the one hand by different support roller diameter. On the other hand, it is possible, in particular if different belts are provided for the one direction of movement and the other direction of movement, that no or only minimal friction between the rotatably mounted and independently supported support rollers.

Preferably, the support rollers of the two strands are mounted axially rotating in opposite directions. This allows on the one hand a simple structural realization of the support roller bearing and on the other hand, for example, by changing the support roller diameter of the vertical distance of the strand can be determined. The horizontal distance is achieved for example by different thicknesses or bearing distances of the support rollers.

If the drive device is assigned to separate belts on two sides of the machine, it is possible with a single motor to obtain a false twist device for both sides of a double-sided longitudinal part spinning machine. The drive device can either be arranged centrally between the two machines and drive the belts via drive shafts and drive pulleys. It is also possible to arrange the drive means on one side of the spinning machine and to drive the belt or belts of the opposite machine side by means of its overdrive. This usually facilitates the maintenance of the drive device, as it is easier to access from one side of the machine.

An advantageous false twist device according to the invention has a drive device at a machine or section end. An associated tensioning device of the at least one belt is then on the other Machine or section end arranged. This ensures that the belt always has a predetermined desired tension to produce a consistent swirl effect on the thread.

If the at least one belt has corner rollers for deflecting and positioning the at least one belt, it is ensured in a simple manner that the position of the belt or the plurality of belts is maintained relative to one another and assumes a desired position relative to the spinning device. The positioning of the false twist device with respect to the spinning unit is advantageously adjustable in order to influence the looping of the belt rums through the thread. The angle of wrap of the two beltroms changes depending on the horizontal and vertical position of the swirling device with respect to the delivery device, in particular the drafting device or the drafting device outlet, the thread and the twist stop on the spinning unit.

In an advantageous embodiment of the invention, the support rollers and / or the corner rollers have different diameters for the guidance of the one and the other run. Thus, the vertical positioning of the Riementrums is adjustable to each other. This also changes the wrap angle of the belt rums through the thread.

When the support rollers are arranged along the spinning machine so as to face each other but are spaced apart from each other along the belt, the belt is guided from two sides. The tension of the belt and the guidance of the belt are thus even safer. In particular, when the support disks are arranged alternately opposite one another, a particularly stable guidance of the belt body is achieved.

If the adjacent support rollers are offset from one another in such a way that the belt circumference runs in a zig-zag shape, then a very particularly advantageous Guidance of the belt allows. Due to the zigzag-shaped guide, the belt rim is held in the support rollers, as the contact between the belt and the support roller is thereby particularly reliable.

In an advantageous embodiment of the invention, both strands run alternately above and below the support rollers along several spinning stations. The beltrums are thus performed more stable. For support rollers with different diameters, the large and the small diameters can alternate, whereby the two strands run parallel to one another and the thread wraps are the same.

It when the arrangement of the support rollers is mutually variable is particularly advantageous. As a result, by the offset of the support rollers to each other, the strength of the deflection of the belt rim and thus the strength of the zigzag-shaped guide of the belt runner can be changed. With a corresponding arrangement of the support rollers with respect to the spinning station or the drafting system output even the distance of the contact point between the belt core and the thread to the drafting system output can be changed thereby. The swirling action of the false twisting device can thereby be influenced in a particularly advantageous way. The two beltrums can run parallel to each other or crosswise, i. the support roller touching the top and bottom, run.

The invention also relates to a false twisting device with belt and a drive device having the aforementioned features, which is adapted to be mounted on a spinning machine to provide a spinning machine according to one or more of the preceding claims.

With the device according to the invention, a false twisting wire is fed to the yarn via the belt guided transversely to the thread run in the area between the drafting device exit and the belt. With the additional twists in the yarn, the spinning stability is increased even with reduced real rotation. It will thus allows the production of yarn with reduced rotation with good spinning stability. The belt is preferably guided along the entire machine. However, there are also sections possible, for example, per section one belt or more independently driven belt. The belt drive is preferably arranged at the beginning of the machine or at the beginning of the section and the belt tensioning device at the machine end or at the end of the section.

The axial positioning of the belt is preferably done via the corner rollers at the machine or section end and the beginning of the machine or section.

The two belts for the two sides of the machine are preferably driven by a motor. The motor drives a shaft arranged across the machine, with the two traction sheaves for the two belts on the left and right. The traction sheaves are arranged centrally above the two corner rollers.

On the opposite side to the drive side of the belt is also performed according to the corner rollers to pulleys. The tension rollers can be moved up to the belt tension of the two belts and fixed in the desired position.

It is possible to guide the belt once at the top and once at the bottom of the support rollers. The belt is thus zigzagged through the belt support rollers. The advantage of this arrangement is that the belt is pulled because of its tension on the support rollers or in the groove bottom of the support rollers. Due to a different height of the roll in which the belt runs down or up, the belt with smaller or larger wrap can run through the rollers. The smaller the loop, the smaller the variation of the distance of the round belt to the drafting device outlet. One therefore seeks an optimum of a belt wrap, in which the safe guidance of the belt is guaranteed and in which the distance between the drafting system outlet and belt still leads to no quality fluctuations in the yarn. It is advantageous if one support roller per punch is used. The vertical distance of the rollers is for example between five and ten millimeters.

If the thread at least one or both belt spins wraps at an angle of more than 90 °, in particular more than 120 °, a particularly advantageous false twist effect is generated on the thread.

Figur 1

eine schematische Darstellung einer erfinderischen Falschdralleinrichtung an einer Spinneinheit,

Figur 2

die schematische Darstellung einer Seitenansicht einer erfindungsgemäßen Falschdralleinrichtung mit einem einzigen Riemen pro Maschinenseite oder Sektion,

Figur 3

eine schematische Darstellung einer Draufsicht einer Spinnmaschine mit der erfindungsgemäßen Falschdralleinrichtung gemäß Figur 2 mit einem Motor,

Figur 4a

eine schematische Darstellung einer zick-zack-förmigen Führung des Riemens,

Figur 4b

eine schematische Darstellung einer zick-zack-förmigen Führung des Riemens mit größerer Auslenkung des Riemens als bei Figur 4a,

Figur 5

eine Darstellung einer Stützrolle für zwei Trums,

Figur 6

eine zick-zack-förmige Riemenführung mit Stützrollen unterschiedlichen Durchmessers,

Figur 7

eine Darstellung einer Stützrolle mit Führungen unterschiedlichen Durchmessers für zwei Trums

Figur 8

eine Darstellung einer weiteren Stützrolle mit Führungen unterschiedlichen Durchmessers für zwei Trums und

Figur 9

eine zick-zack-förmige Riemenführung in Seitenansicht.

Further advantages of the present invention are described in the following exemplary embodiments. It shows:

FIG. 1

a schematic representation of an inventive false twist device on a spinning unit,

FIG. 2

the schematic representation of a side view of a false twist device according to the invention with a single belt per machine side or section,

FIG. 3

a schematic representation of a plan view of a spinning machine with the false twist device according to the invention according to FIG. 2 with a motor,

FIG. 4a

a schematic representation of a zigzag-shaped guide of the belt,

FIG. 4b

a schematic representation of a zig-zag-shaped guide of the belt with greater deflection of the belt as in FIG. 4a .

FIG. 5

a representation of a support role for two runs,

FIG. 6

a zigzag-shaped belt guide with support rollers of different diameters,

FIG. 7

a representation of a support roller with guides of different diameters for two runs

FIG. 8

a representation of another support roller with guides of different diameters for two strands and

FIG. 9

a zigzag-shaped belt guide in side view.

In FIG. 1 a spinning unit 1 of a spinning machine 10 is shown schematically partially. An output roller pair 2 of a drafting system, not shown, provides a thread 3 and forms a drafting device outlet SA. The thread 3 is deflected about a first plastic belt 4 and then about a second plastic belt 5. Subsequently, the thread 3 passes through a twist stop 6 and a ring traveler 7 and is subsequently wound onto a spool 8. The first plastic belt 4 and the second plastic belt 5 form a false twist device 9. The two plastic belts 4 and 5 may be two separate belts 4 and 5 or the pulling and the sliding strand of a single belt.

The first plastic belt 4 and the second plastic belt 5 and the two strands have an opposite direction of movement. The fact that the yarn rests on two in the opposite direction moving belt, it is pulled from the one strand in one and the other strand in the other direction. The yarn is deflected to the running direction until the two friction forces are in balance. The thread tensions F ₁₁ and F ₁₂ and F ₂₁ and F ₂₂ are different. Thus, the contact pressure of the thread on the one Riementrum is different to the other Riementrum. The thread is taken so more of the Riementrum on he rests stronger, assuming it is similar belt 4 and 5. In ring spinning, the contact pressure on the thread ballon between the twist stop 6 and ring traveler 7 closer strand is highest. The belt of this strand moves so that the true rotation is amplified by the false twist generated by the belt. Between belt 4 and drafting roller 2 usually more rotations are introduced, as then later in the finished yarn on the cop or the coil 8 are present.

By arranged in a substantially horizontal plane belt 4 and 5 in conjunction with the arrangement of the pair of output rollers 2 and the drafting outgoing SA and the twist stop 6 a looping of the belt 4 and 5 or the strand is generated by the thread 3, which more than 90 °. As a result, a particularly high frictional force on the thread 3 and thus swirl is introduced into the thread 3. The false twist device can thereby work very effectively. Nevertheless, the thread 3 is spared so far that a thread break is to be avoided in an acceptable manner.

FIG. 2 schematically shows the arrangement of a belt drive in side view. The belt 11 is stretched between a belt drive pulley 12 and a belt tensioning pulley 13. The belt drive pulley 12 is arranged at a machine or section beginning 14, while the belt tensioning disc 13 is attached to a machine or section end 15. The belt drive pulley 12 is connected to a drive motor, which is not visible here, and drives the belt drive pulley 12. The belt drive pulley 12 is preferably fixed to the machine start 14. In contrast, the belt tensioning disc 13 is arranged movably on the machine end 15. By a vertical movement of the belt tensioning disc 13 in the double arrow direction, the belt 11 can be tensioned more or less.

The belt 11 passes over corner rollers 16 and support rollers 17. The corner rollers 16 direct the belt 11 and the belt core 4 and 5 into the desired position at the level of the spinning units. Between the corner rollers 16, the belt 11 is preferably straight or zigzag along a plurality of juxtaposed spinning units. The leadership of the Riementrums 4 and 5 in the spinning units 1 by means of the support rollers 17th

The support rollers 17 are arranged between the spinning units. They may be present on each spinning unit or may be provided with a spacing of several spinning unit. Each support roller 17 has surfaces or grooves on or in which the belt rim 4 or 5 is located and held in position. As a result, both a stable running of the belt 11 is ensured with respect to the thread 3, as well as in connection therewith a uniform twisting of the thread. The corner rollers 16 and / or the support rollers 17 may have different diameters for the belt core 4 and the belt core 5. As a result, a vertical distance of the belt pulleys 4 and 5 is achieved with a horizontal alignment of the axis of the support rollers. Assign the corner rollers 16 and the support rollers 17, however, a same diameter of their support surfaces, it is located at a horizontal arrangement of the axes of the support rollers 17, the course of Riementrum 4 and Riementrum 5 in the same horizontal plane.

Belt 4 and belt 5 move in opposite directions with the speeds v ₁ and v ₂ . The support surfaces of the support rollers 17 therefore also rotate in opposite directions. The support rollers 17 therefore advantageously have partial rollers which are rotatably supported independently of each other.

FIG. 3 shows a plan view in a schematic representation of a spinning machine 10. The spinning machine 10 has a plurality of spinning units 1, which are arranged side by side. On each side of the machine before the spinning units 1, a belt drum 4 and a belt drum 5 in opposite Direction driven. The two belts 11 and 11 'are driven by a single motor 18. The motor 18 drives in turn by means of an overdrive 19 two belt pulleys 12 and 12 'at. The belt 11 or 11 'is arranged between the belt drive pulley 12 or 12' and the belt tensioning pulley 13 or 13 '. By means of the corner rollers 16 and 16 ', the belt 11 or 11' is deflected to the desired height.

In front of the spinning stations 1, the support rollers 17 are arranged, which support Riementrum 4 and 5 or 4 'and 5'. The support of the belt pulley 4 and the belt pulley 5 or 4 'and 5' takes place per support roller 17 with a separate partial pulley, which is independent of the other partial pulley. This ensures that the sub-rollers can have different speeds and directions of rotation and thus also support different drive speeds of the belt tower 4 and 5 substantially without friction.

Are the support rollers 17 designed such that they are axially displaceable to each other, d. H. that the partial role for the Riementrum 4 and the corresponding part of the belt Riementrum 5 are axially spaced apart from each other, so on the one hand, a simple adaptation to forces, which can be caused by the false twisting device and the cooperating thread 3, are compensated. On the other hand, the threading of the thread in the false twisting device is facilitated because the Rimentum 4 and 5 can be removed from each other to increase the distance and the thread just manually or automatically z-shaped to put around the Riementrums around.

The corner rollers 16 and the support rollers 17 each have either the same diameter depending on the design. Alternatively, they each have different diameters, so that the wrapping angle of the yarn and the two reciprocating belts adapted accordingly can be. The two reciprocating belt rums 4, 5 are thus no longer at the same horizontal height.

FIGS. 4a and 4b The belt core 4 extends in this embodiment zig-zag-shaped, since support rollers 17 are arranged opposite one another and offset in the running direction of the belt 11 to each other. The clear distance between the adjacent support rollers 17 is smaller than zero, or in other words, with the same diameter of adjacent support rollers 17, the distance h, H of the centers of the support rollers 17 is less than or equal to the diameter of the support rollers 17. The leadership of the support rollers 17 thus acts alternately from below and from the top of the Riementrum 4 and the Riementrum 4 runs zigzag-shaped.

Preferably, the clear distance between adjacent rows of support 17 is variable. As a result, the looping of the support rollers 17 by the belt core 4 can be influenced. The farther the overlap of the adjacent support rollers 17, the greater the wrap of the belt runner 14. During FIG. 4a shows a weak wrap (distance H) is in FIG. 4b an example of a very strong wrap (distance h) shown. If the support rollers 17 are arranged on punches of each spinning station 1, the position at which the thread 3 contacts the belt from the spinning station 1 to the spinning station 1 is the same. This means that the distance d, D of drafting equipment outlet SA to the belt contact at each spinning station 1 is the same. As a result of the variation of looping or the overlapping of the adjacent support rollers 17, the distance between the false twisting device and the drafting device exit can thus be adjusted. FIG. 4a shows at a small wrap a smaller distance d than at FIG. 4b with a large wrap and distance D. It is assumed in this embodiment that only the upper support rollers 17 are moved.

Preferably, an optimum belt wrap is sought to ensure safe guidance of the belt 11 and to achieve the distance d, D from the drafting device exit SA to the belt 11 such that there are no quality variations in the yarn. Of course, it is also possible to arrange the support rollers 17 at a greater distance than from the spinning station to the spinning station or to adjust the lower support rollers 17 together with or without the upper support rollers 17.

In FIG. 5 a detail of a support roller 17 is shown. The support roller 17 is attached to a holder 21, for example, on a machine frame of the spinning machine 10. On the holder 21, an axis 22 is arranged, on which partial rollers 23 and 24 are rotatably mounted. Each of the sub-rollers 23 and 24 has a circumferential groove in which the pulling and pushing belt 4 and 5 is guided. The two sub-rollers 23 and 24 are disposed below or above the belt. They are mounted on a common axis 22 and rotate accordingly in opposite directions.

Advantageously, the partial roller 23 and the partial roller 24 are identical parts. But they can also be designed differently, especially if the plane in which run the belt rungs 4 and 5, should not be horizontal but oblique. Accordingly, then, for example, the sub-roll 23 and the guide surface would be designed with a smaller diameter than the sub-roll 24. The sub-rollers 23 may be executed as shown here with a groove or smooth. The embodiment with a groove, as shown here, however, has the advantage that the beltrems 4 and 5 are also guided laterally and are not only supported. About the support roller 17, a locking pin 25 is attached to the holder 21. The locking pin 25 ensures that the belt rums 4 and 5 can not jump out of the leadership of the sub-rollers 23 and 24. The support roller 17 can either be arranged below the belt run 4 and 5 as shown here. However, it is also possible that the support roller 17 is provided such that the belt rungs 4 and 5 at the bottom of the support roller 17 in the Groove of the sub-roll 23 or partial roll 24 run. In this case, it is advantageous if the securing pin 25 is likewise arranged below the support roller 17. The belt is prevented from jumping out of the roller guide by means of a safety pin. The locking pin 25 must be removed depending on the design for placing and removing the belt.

Along the machine several belt support rollers 17 are arranged. Preferably, the support rollers 17 are positioned at a distance of eight or twenty-four spinning stations 1 between the spinning stations 1.

The support rollers 17 and partial support rollers 23, 24 are mounted by means of ball, roller or preferably plain bearings. In roller and plain bearings, the support rollers are given axial freedom, so that the support rollers 17 or partial support rollers 23, 24 are axially aligned by the belt 11. With sufficient axial air of the support rollers 17 of the belt 11 runs without distraction dead straight along the machine 10. On the rollers 17 and 23, 24 thus acts no axial force.

In FIG. 6 is shown a zigzag-shaped belt guide with support rollers 17a and 17b of different diameters. The embodiment is on FIG. 2 leaned, in which the belt 11 runs above the support rollers 17. In FIG. 6 it runs alternately up and down. The leadership of the belt 11 and the strands 4 and 5 is thus better to accomplish. The support rollers 17a lead the belt 11 below its axis of rotation. The part roll with the smaller diameter is arranged in front. In the support rollers 17b, the guide is above the axis of rotation of the support rollers 17b. The partial role with the smaller diameter is arranged at the back. The respective thread 3 wraps around the strands 4 and 5 between the support rollers 17a and 17b. The strands 4 and 5 run parallel, whereby the looping of the strands 4 and 5 through the thread 3 at all spinning positions is substantially equal.

FIG. 7 an illustration of a support roller 17 with guides of different diameters for two runs 4 and 5 is shown. The guides are provided in the two sub-rollers 23 and 24. Partial rollers 23 and 24 are rotatably supported in opposite directions on the axis 22 and arranged on the holder 21. The sub-roll 23 has a larger diameter - based on the leadership of the strand 4 and 5 - as the sub-roll 24. The strands 4 and 5 are therefore at a vertical distance from each other. The thread 3 wraps around first the strand 4 and then the strand 5. The angles α and β are relatively large, ie the looping of the strands 4 and 5 is only small, here only slightly more than 90 °, as indicated by the dotted lines is.

In FIG. 8 is another support roller 17 with guides of different diameters for two strands 4 and 5 shown. It is similar to the support roller 17 of FIG. 7 built up. However, here the front part of the roller 23 is provided with a smaller diameter than the rear part of the roller 24. As well as in FIG. 7 the strands 4 and 5 are supported and guided above the axis of rotation of the support roller 17. At approximately the same supply and discharge of the thread 3, the angle α and β but smaller than in the embodiment according to FIG. 7 , The looping of the strands 4 and 5 is here according to the dotted lines almost 180 °.

FIG. 9 shows a side view of a zig-zag-shaped belt guide similar to the execution FIG. 6 , The support roller 17a shown in the foreground has a smaller part roller 23a and a larger part roller 24a. The strands 4 and 5 extend below the support roller 17a. The support roller 17b shown in the background has a larger part roller 23b and a smaller part roller 24b. The strands 4 and 5 extend above the support roller 17b. The differences in the diameters are the same in each case, resulting in a parallel run of the strands 4 and 5 in conjunction with the alternately guided top and bottom runs 4 and 5. The wraps of the threads 3 are therefore the same at each spinning station. The support roller 17a and the support roller 17b are fixed to axles 22a and 22b as previously described.

Of course, the embodiments shown above are not exhaustive. Thus, for example, the belt 4 per machine side or sectioned be executed. The inner belt 5 may also revolve around the entire machine while the outer belt 4 is split. It is also possible that the representations of the Figures 2 and 3 do not represent the entire spinning machine 10, but only a section 17 or another predetermined section. The multiple sections or sections 17, which make up such a spinning machine 10, can then be operated independently of one another with respect to their false twist device 9. The pair of output rollers 2 of a drafting system can also be another component, with which the thread 3 of the false twisting device 9 is supplied. Combinations of the individual illustrated and described features of the invention from the various figures are possible at any time. The embodiments are not limited to their individual representations, but can be combined.

LIST OF REFERENCE NUMBERS

1

Spinning unit of a spinning machine

2

Output roller pair of a drafting system

3

thread

4

First Riementrum

5

Second Riementrum

6

twist stop

7

ring rotor

8th

Kitchen sink

10

spinning machine

11

belt

12

The drive belt pulley

13

Idler pulley

14

engine start

15

machine end

16

Corner Castor

17

support rollers

18

engine

19

Exaggerated

21

holder

22

axis

23

part role

24

part role

F ₁₁ , F ₁₂ , F ₂₁ , F ₂₂

thread tensions

_v1, v ₂

belt speed

SA

Drafting system

α, β

angle

h, H

Distance between the centers of the support rollers 17th

d, D

Distance from drafting system outlet SA to the belt contact

Claims (17)

Spinning machine, in particular ring spinning machine with a plurality of juxtaposed units (1),
wherein each unit (1) comprises a drafting system for warping a sliver and
a spinning device for rotating the warped sliver to a thread (3) and
has a false twisting device (9) arranged between the drafting device and the spinning device,
the false twisting device (9) has at least one belt (11) driven by a drive device, which extends essentially transversely to the yarn (3) and the yarn (3) has two opposite runs (4, 5) of the belt (s) (11 ) wraps around in particular z-shaped,
characterized in that
the at least one belt (11) extends between the drive device and a deflection device along several of the units (1) of the spinning machine (10), that the belt (11) is supported by at least one support roller (17) and that the at least one support roller (11) 17) is mounted with axial freedom. Spinning machine according to the preceding claim, characterized in that the at least one belt (11) runs along an entire section of the spinning machine (10) or along the entire spinning machine (10). Spinning machine according to one or more of the preceding claims, characterized in that the at least one belt (11) runs along one side of the spinning machine (10). Spinning machine according to one or more of the preceding claims, characterized in that the two of the thread (3) looped strand (4,5) are arranged substantially in a horizontal plane. Spinning machine according to one or more of the preceding claims, characterized in that each run (4, 5) is supported in a support roller (17, 23, 24) mounted separately. Spinning machine according to one or more of the preceding claims, characterized in that the support rollers (17, 23, 24) of the two strands (4, 5) are mounted on an axis (22) but in opposite directions of rotation. Spinning machine according to one or more of the preceding claims, characterized in that the drive device is assigned to separate belts (11, 11 ') of two machine sides. Spinning machine according to one or more of the preceding claims, characterized in that the drive device at a machine or section or section end (14) and an associated clamping device of the at least one belt (11) on the other machine or section or section end (15) is arranged. Spinning machine according to one or more of the preceding claims, characterized in that associated with the at least one belt (11) are corner rollers (16) for deflecting and positioning the at least one belt (11). Spinning machine according to one or more of the preceding claims, characterized in that the support rollers (17) and / or the corner rollers (16) have different diameters for the guidance of the one and the other run (4,5). Spinning machine according to one or more of the preceding claims, characterized in that the backup rollers (17) and / or the corner rollers (16) is associated with a fuse for preventing a jump-out of the belt (11) from the roller guide. Spinning machine according to one or more of the preceding claims, characterized in that a plurality of the support rollers (17) are arranged opposite one another but spaced apart from one another along the belt (11). Spinning machine according to one or more of the preceding claims, characterized in that the support rollers (17) are offset from one another in such a way that the belt rim (4, 5) runs in a zig-zag shape. Spinning machine according to one or more of the preceding claims, characterized in that both strands (4, 5) run alternately above and below the support rollers (17, 23, 24). Spinning machine according to one or more of the preceding claims, characterized in that by the arrangement of the support rollers (17) on the units (1) and by a variable offset of the support rollers (17) to each other the distance (d, D) of the belt (11) from the drafting system output (SA) is changeable. Spinning machine according to one or more of the preceding claims, characterized in that the thread (3) wraps around one or both belt triangles (4, 5) at an angle of more than 90 °, in particular more than 120 °. False-twisting device with belt and a drive device with the features mentioned in the preceding claims for a spinning machine (10) according to one or more of the preceding claims.

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