DE102019116488A1 - Thread connecting device for the knot-free connection of two thread ends - Google Patents

Abstract

The invention relates to a thread connecting device for the knot-free connection of two thread ends, with friction disks for the mechanical loading of the thread ends to be connected, which are rotatably mounted relative to one another and can be advanced and several thread separating means are provided in each case for cutting a thread to length. According to the invention, one of the friction disks is constructed in several parts is and has a middle part, an inner ring and an outer ring, which are axially displaceable, that the other friction disc has at least one middle part and one ring, that a first drive for the axial feed of at least the middle part, the inner ring and / or the outer ring of the multi-part formed friction disk is present, wherein the first drive is assigned a control that a second drive for rotating the inner ring, the outer ring and / or the ring is present, wherein the second drive is assigned a control that a third There is a drive for actuating the thread separating means, a control being assigned to the third drive, and the controls for the drives being connectable to a central control unit via which the movements of the drives can be specified centrally.

Description

The invention relates to a thread connecting device and a textile machine producing take-up bobbins comprising such a thread connecting device.

In the textile industry, thread connecting devices have long been part of the state of the art and are described in detail in numerous patent applications. Thread connection devices produce an almost yarn-like thread connection by swirling or twisting two thread ends. Such thread connections are a decisive criterion for the yarn quality and should not only have yarn-like strengths, but also have an appearance that is as yarn-like as possible.

If a thread break occurs during the manufacturing process on a textile machine producing take-up bobbins or if a defined cleaner cut has been made at one of the workstations of the textile machine due to a thread defect, the thread ends of the separated thread are first placed in the area of the thread splicing or splicing device by special pneumatic devices brought back. A suction nozzle fetches the so-called upper thread from the cheese and places it in the thread connecting device, if necessary after cleaning out the thread defect. Correspondingly, the so-called lower thread, which originates, for example, from a supply package positioned in the unwinding position, is also inserted into the thread connecting device by means of a gripper tube that can be subjected to negative pressure.

The principle of mechanical splicing is that the upper and lower thread are first untwisted by turning friction disks in opposite directions and then closed / twisted again, whereby after untwisting the thread ends are shortened so that they only overlap in a limited area and are spliced together can.

Through the EP 0 140 412 A1 a thread connecting device is disclosed which comprises two friction disks which can be driven in opposite directions for the mechanical loading of two thread ends. At the beginning of a thread joining process, the thread ends are positioned between the friction disks, untwisted and torn. In order to locally limit and bundle the now brush-shaped thread ends, which no longer have any rotation and in which the fibers are almost parallel to one another, the thread ends are bundled by so-called combs and then spliced together, ie twisted together.

The thread connecting device according to EP 0 140 412 A1 comprises two friction disks, each of which comprises a twist-on and twist-off ring arrangement and a twist-off arrangement. Furthermore, the thread connecting device has adjustable cam arrangements which initiate the untwisting and closing separately from one another, as well as spacer means which at least temporarily hold the surface of the friction disks at a desired distance. For tearing or plucking the threads, devices comprising movable sections are also provided which clamp and tear the respective thread.

Since the movements and coordination of the handling devices in the thread joining device are carried out by a motor-driven cam arrangement or a cam gear, all of the processes / operations required in the splicing cycle are defined in one full revolution of the cam disk. Such a design requires, on the one hand, a high level of structural effort and, on the other hand, is not flexible, for example with regard to different yarn requirements or changing individual process parameters. A repetition of individual processes / activities within a splicing cycle is excluded.

A first aspect of the invention therefore relates to a thread connecting device for knot-free connection of two thread ends, with friction disks for mechanically acting on the thread ends to be connected, which are rotatably mounted relative to one another and can be advanced and several thread separating means are each provided for cutting a thread to length.

The friction disks are characterized in that one of the friction disks is made in several parts and has a central part, an inner ring and an outer ring, which are axially displaceably mounted, that the other friction disk has at least one central part and a ring, that a first drive for axial feed at least the central part, the inner ring and / or the outer ring of the multi-part friction disk is present, the first drive being assigned a control that a second drive for rotating the inner ring, the outer ring and / or the ring is present, the second drive a control is assigned, that a third drive is available for actuating the thread separating means, a control being assigned to the third drive, and that the controls of the drives can be connected to a central control unit via which the movements of the drives can be specified centrally.

If one of the friction disks is constructed in several parts and the individual parts are axially displaceable stored, so both the untwisting of the thread ends and the twisting / twisting of the thread can be reliably guaranteed. The axially displaceable middle part of the friction disk also ensures that the threads are securely clamped during the break. With such a configuration of at least one friction disk, the individual parts can be fed individually or at least partially together to the second friction disk or brought into contact with the second friction disk. The second friction disc has at least one central part and a ring, it being possible for this friction disc to be either one-part or multi-part. In the context of the invention, it is also conceivable that both friction disks are designed to be multi-part and / or axially displaceable.

There is a first drive which axially positions at least the individual components of the multi-part friction disk. If both friction disks are mounted so as to be axially displaceable, the first drive can be used to drive both friction disks. Depending on the process step, the first drive positions parts of the multi-part friction disk individually or together in such a way that the friction disks are positioned towards one another or have a gap to one another. At the beginning of the splicing process, for example, the outer ring is fed to the ring, at a later point in time the middle part is axially displaced so that it is fed to the middle part of the other friction disk and the outer ring is briefly out of contact with the ring. In order to finally twist the thread ends together, the inner and outer rings are moved axially together.

The second drive of the thread splicing device drives the inner and outer rings of the multi-part friction disk and the ring of the second friction disk to rotate. Both friction disks are usually driven in opposite directions of rotation after they have been advanced to one another by the first drive and are thus in operative connection with one another. While the outer ring and the ring are driven in the opposite direction of rotation to untwist the upper and lower thread, the inner and outer ring and the ring are driven to rotate the thread ends.

Finally, the thread splicing device has a third drive which drives several thread separating means, usually two. After the upper and lower thread have been freed from their rotation, the middle part clamps the two threads and the thread separating means cut both threads to length. This ensures that the two thread ends only overlap in a limited area, so that the fibers of both thread ends can be twisted with one another without creating a splice that is thicker than the rest of the thread.

A control is assigned to all three drives, which can either be part of the respective drive or be located at a different location. In the simplest case, the control is formed by the workstation computer, since this is usually available at every workstation anyway. The controls can also be connected to a central control unit so that the motion sequences of the individual drives can be controlled via the central control unit. It is conceivable within the scope of the invention that the central control unit can be integrated in the respective textile machine, can be formed by a computer or the like externally assigned to several textile machines, or else by a mobile terminal, for example a smartphone or tablet.

The elimination of the cam gear and the implementation of three individual drives, which are formed, for example, by stepper motors, allow different yarn requirements and yarn properties to be taken into account. However, the thread splicing device according to the invention can also react flexibly to different events within a splicing cycle. It is also possible to repeat a single process step or several process steps within a splice cycle. Changes to the individual process parameters can be made via the central control unit without manual intervention on the thread splicing device.

The thread connecting device according to the invention with three independently controllable drives has the advantage that with a thread splicing device designed in this way, all types of yarns can be prepared in accordance with the regulations and then spliced almost exactly like the yarn, ensuring that the threads to be connected are constantly and securely fixed during the entire splicing process .

The connection of the controls of the drives to a central control unit also has the advantage that, if necessary, for example when changing a lot on the textile machine, the individual drives of the various functional elements of the thread splicing device can be quickly and precisely reset via the central control unit. This means that, thanks to the problem-free optimization of the settings of the thread splicing device, it is easy to create splice connections which not only have an almost yarn-like appearance, but which also largely correspond to "normal" threads in terms of their strength.

In an advantageous embodiment, the amount of the axial distance between the friction disks can be set in a defined manner via the first drive while the threads are being acted upon.

If the inner and / or the outer ring of the multi-part friction disc can be positioned flexibly and as required, not only in terms of infeed or non-infeed, but also in terms of the amount of axial distance, a wide variety of requirement profiles can be taken into account. For example, for a thin or thick yarn, an individual axial distance can be selected during the application of the threads. Variable positioning or axial feed of the friction disk parts can even be implemented within a splicing cycle. The first drive can be controlled via the central control unit.

The angle of rotation of the friction disks or the inner ring, the outer ring and / or the ring can preferably be set in a defined manner via the second drive.

The friction disks are only used in a limited angular range, corresponding to the angular range by which the friction disks are rotated against each other. With an individual drive, the individual rotatably mounted parts of the friction disks can be individually driven in a smaller or larger angular range, depending on the requirements. If, for example, a particularly high-twisted yarn is processed, the angular range can be greater than that of a yarn with relatively few twists. The second drive can be controlled via the central control unit.

In a preferred embodiment, the thread separating means are designed as reversibly drivable thread winches with a slotted head part.

When positioning the upper and lower thread between the friction disks, it is guided both via thread guide means, which ensure proper insertion of the thread ends into the thread connecting device, and via thread separating means for later cutting the threads to length. With such thread separating means, designed as thread winches, which are positioned in front of and behind the friction disks in the thread running direction, the upper and lower threads that result after untwisting can be reliably cut to length.

The upper thread is guided through the slot-shaped head part of the lower thread winch and the bobbin thread through the slit-shaped head part of the upper thread winch. After the two threads have been untwisted, the upper and lower threads are cut to length by rotating the thread winches, which are designed as a shaft piece, around their respective longitudinal axis and thereby winding the respective thread onto the thread winch. This ensures that the two thread ends only overlap in a limited area, so that the fibers of both thread ends can be twisted with one another without creating a splice that is thicker than the rest of the thread. Because the upper and lower thread are each wound around the circumference of the respective shaft section of the thread winch, the thread winches have an almost unlimited absorption and pre-stretching capacity, so that even highly elastic yarns can be torn safely and reliably. After the thread connection has been created, the thread winches are driven backwards and thus release both thread remnants, which are then sucked up and disposed of by the suction nozzle or the gripper tube.

Another advantage of the inventive design of the thread separating means as thread winches with a slotted head part is that the upper and / or lower thread can be pre-tensioned before the thread connection is created, which influences the untwisting behavior, the tensile strength behavior and / or the thread connection to be established.

For this purpose, after the upper and / or lower thread are positioned between the friction disks and inserted into the head parts of the thread winches, before the friction disks or parts of the friction disks are fed to one another, the upper and / or lower thread is at least rudimentarily applied by rotating the thread winches respective thread winch wound up. The thread treatment and thus the splice connection to be made can be influenced by the tension thus applied to the respective thread. When the upper and / or lower thread are under tension between the friction disks, at least parts of the friction disks are fed to one another, the threads are freed from their rotation and cut to length, in order to then splice the thread ends together.

Advantageously, the revolutions of the thread winches can be set in a defined manner via the third drive.

Since both the speed at which the thread winches rotate and the number of revolutions that the thread winches execute can be set via the central control unit, the thread winches can be used to process a wide variety of yarns individually and as required. The third drive can be controlled via the central control unit.

The third drive can also be used to check the tensile strength after a splice connection has been made. For this purpose, the thread with the splice just made is fed to the thread winches and drawn. The splice is located between the two thread winches. By impressing a defined motor current, the splice is loaded with a corresponding force. If the splice withstands the applied voltage / force, the motor standstill can be determined via the driver electronics of the stepper output stage and the information can be used accordingly. A determination of the maximum splice strength is also conceivable using this method.

However, the thread splicing device according to the invention can also react flexibly to different requirements within a splicing cycle. It is also possible to repeat the tearing process within a splicing cycle. If, for example, the elastic thread was not torn on the first attempt, it is conceivable within the scope of this invention that the thread winches are rotated again in order to wind up more thread and thus carry out a new tearing process.

In a further preferred embodiment, the central control unit is a central control unit of a textile machine producing packages.

A central control unit is present in almost every textile machine that produces take-up bobbins and is therefore ideal for functioning as a central control unit.

A second aspect of the invention therefore relates to a textile machine producing take-up bobbins with thread connecting devices for connecting two thread ends without knots.

The textile machine producing take-up bobbins is characterized in that at least one thread connecting device is formed according to one of the embodiments described above.

The advantages and effects described in this context can thus be achieved. A textile machine with at least one thread connecting device configured in this way can process the most varied of yarns flexibly and as required, with the optimal process parameters always being able to be selected, set and implemented. As the individual drives are controlled by a central control unit, there is no need to manually adjust the thread splicing device itself.

Further features and advantages of the invention emerge from the following description of preferred exemplary embodiments of the invention, with reference to the figures and drawings which show details essential to the invention, and from the patent claims. The individual features can each be implemented individually or collectively in any combination in a preferred embodiment of the invention.

• 1 in Seitenansicht eine Arbeitsstelle einer Spulmaschine mit einer Fadenverbindungsvorrichtung;
• 2 schematische Darstellung der Fadenverbindungsvorrichtung mit erfindungsgemäß ausgebildeten Reibscheiben;
• 3 schematische Darstellung des ersten Antriebs in Einbaulage;
• 4 schematische Darstellung des zweiten Antriebs in Einbaulage;
• 5 schematische Darstellung des dritten Antriebs in Einbaulage.

Preferred embodiments of the invention are explained in more detail below with reference to the accompanying drawings.

• 1 a side view of a workstation of a winding machine with a thread connecting device;
• 2 schematic representation of the thread connecting device with friction disks designed according to the invention;
• 3 schematic representation of the first drive in the installation position;
• 4th schematic representation of the second drive in the installation position;
• 5 schematic representation of the third drive in the installation position.

In 1 Fig. 3 is a schematic front view, generally designated by the reference number 1 marked textile machine producing take-up bobbins, in the exemplary embodiment a winding machine, shown.

Such winding machines 1 usually have a large number of similar workplaces between their end frames (not shown) 2 on which, as is known and therefore not explained in detail, spinning cops 9 that were produced on a ring spinning machine, for example, into large-volume packages 15th be rewound.

After their completion, these cross-wound bobbins 15th by means of an automatically operating service unit, preferably a (not shown) package changer, on a machine-length package transport device 21st handed over and transported to a machine end side arranged coil loading station or the like.
Such winding machines 1 usually also have a logistics facility in the form of a reel and tube transport system 3 on, in, on transport plates 8th in vertical orientation, spinning cops 9 , or empty tubes circulate. From this package and tube transport system 3 are in 1 only the cop feed line 4th , the reversibly drivable storage section 5 , one of the to the winding units 2 leading transverse transport routes 6th as well as the case return line 7th shown.

Furthermore, such winding machines have 1 usually via a central control unit 47 over a bus line 46 both with the workstation computers 29 of the individual jobs 2 and is also connected to a control device of the service unit.

As already indicated above, the delivered spinning cops 9 in the unwinding positions AS, which are each in the area of the transverse transport routes 6th at the winding units 2 too large-volume packages 15th rewound.

The individual jobs 2 For this purpose, as is known and therefore only indicated, have various facilities that guarantee the proper operation of these workplaces. These devices are, for example, one about a first pivot axis 13 limited rotatable suction nozzle 12th for handling an upper thread 31 , one around a second pivot axis 20th rotatable gripper tube 25th for handling a bobbin thread 32 and a thread connecting device 10 , in the upper and lower threads 31 , 32 be inserted to carry out a thread joining process.

Such jobs 2 As a rule, they also have other devices, not shown, such as a thread tensioner, a thread cleaner, a waxing device, a thread cutting device, a thread tension sensor and a lower thread sensor.

Winding the cheeses 15th takes place on winding devices 24 . Such winding devices 24 have, among other things, a coil frame 28 around a third pivot axis 22nd is movably mounted and has a device for rotatably holding a cheese tube. During the winding process the lies in the bobbin frame 28 freely rotatably mounted cheese 15th with their surface on a reel drive drum 14th and is carried along by this via frictional engagement.

The thread splicing device 10 has three separate, reversible drives 34 , 39 and 42 on.
The first drive 34 , the second drive 39 and the third drive 42 , which are preferably designed as stepper motors, are by a workstation computer 29 , for example via a bus line 37 with a central control unit 38 such as a central control unit of the textile machine 1 , is connected, controlled in a defined manner.
This means that in this exemplary embodiment the setting parameters are for all drives 34 , 39 and 42 via the central control unit of the textile machine 1 adjustable together.

2 shows a thread connecting device 10 with a housing 11 in a schematic representation, so that one of the friction disks 16 , the area between the friction disks 16 as well as the area above and below the friction disks 16 can be seen.

For connecting two thread ends, i.e. for connecting the upper and lower thread 31 , 32 , becomes the upper thread 31 by means of the suction nozzle 12th and the bobbin thread 32 by means of the gripper tube 25th between the friction disks 16 positioned. For this purpose, the thread is guided by thread guides 30th to ensure that the thread ends are correctly inserted into the thread splicing device 10 to ensure, as well as thread separating agents 33 , for later cutting to length of the threads.

In the simplest embodiment of the thread connecting device 10 are only the parts of the multi-part friction disc 16 axially displaceable, while the other friction disc 16 is firmly stored. In principle, however, both friction disks could also be used 16 be axially displaceable. From the multi-part friction disc 16 , are in this embodiment the middle part 17th , the inner ring 18th as well as the outer ring 19th individually axially displaceable.

After positioning the upper and lower threads 31 , 32 between the friction disks 16 becomes the outer ring 19th the ring 23 the opposite friction disc 16 delivered so that the threads are directly between the friction disks 16 are located. Both friction disks 16 are driven in opposite directions of rotation, so the upper and lower threads 31 , 32 to turn it up or to free it from its rotation.

This is followed by the sliding middle section 17th the middle part 17th the opposite friction disc 16 advanced to upper and lower thread 31 , 32 to clamp. The outer ring 19th temporarily out of contact with the ring 23 brought and meanwhile tear or cut the thread separators 33 the upper and lower threads 31 , 32 . Which are in the thread separating agents 33 Remnants of thread are removed from the suction nozzle 12th and the gripper tube 25th sucked up and removed. Between the friction disks 16 the thread ends of the upper and lower thread are left 31 , 32 which are freed from their rotation and thereby each form a brush-shaped thread end in which the individual fibers are present.

After cutting to length, both the inner ring 18th as well as the outer ring 19th axially displaced and the opposite friction disc 16 with her middle part 17th and the ring 23 delivered. Both friction disks 16 have recesses 26th on, in the guide means 27 can intervene. This guide means 27 ensure that after the Removing the twist of the thread and cutting the upper and lower thread to length 31 , 32 the almost parallel alignment of the fibers is retained and the brush-shaped thread ends are centered or bundled, so that the fibers of the thread ends are rotated again in opposite directions 16 can be twisted together.

Before the friction discs 16 again in the opposite direction of rotation to twist the thread ends of the upper and lower thread together 31 , 32 or applying the rotations are driven, the middle part 17th axially displaced so that it is out of contact with the opposite central part 17th is spent.

The 3 shows a schematic representation of the first drive in the installed position.

The first drive 34 is about a segment wheel 35 with a coupling rod 36 connected. The coupling rod 36 is also equipped with a screw jack 37 connected and drives this rotationally. The screw jack 37 rotates and by running onto the lifting cam, the axial positioning of the friction disc 16 or parts of the friction disc 16 achieved.

Are both friction disks 16 A second coupling rod is mounted axially displaceably 38 in 2 only indicated, which axially positions the second friction disc via a further (not shown) cam mechanism. For the sake of clarity, in 3 only the second coupling rod 38 shown, to which the (not shown) further cam gear can be connected.

That is, about the first drive 34 will either be the middle section 17th , the inner ring 18th , the outer ring 19th the multi-part friction disc 16 and / or the middle part 17th and the ring 23 the other friction disc 16 axially displaced in a defined manner.

The thread splicing device according to the invention 10 also has a second drive 39 on who in 4th is shown schematically in the installation position.

Via a transmission 40 drives the second drive 39 the friction disc 16 or the ring 23 at. Via a coupling shaft 41 , via which another (not shown) gear wheel from the second drive 39 is drivable, the second, opposite friction disc 16 or the inner and outer ring 18th , 19th driven in opposite directions.

The 5 shows a schematic representation of the thread winches according to the invention 44 in installation position.

The drive 42 for the thread winches 44 drives through a gearbox 43 the thread winches 44 each with a slotted headboard 45 have, in each of the one of the threads to be spliced 31 or. 32 is insertable.

This means that upper threads are used to create a thread connection 31 and bobbin thread 32 , aligned parallel to each other, between the friction disks 16 the thread splicing device 10 positioned and separated into the headboards 45 the thread winches 44 inserted.

Then start up the first drive 34 via the cam gear 37 the outer ring 19th the multi-part friction disc 16 axially displaced so that the outer ring 19th the ring 23 the opposite friction disc 16 is delivered.

The next step will be the outer ring 19th and the ring 23 by the second drive 39 as well as the transmission 40 rotates in opposite directions and thereby the upper and lower thread 31 , 32 untwisted so that they are largely freed from their yarn twist.

Around the upper and lower thread 31 , 32 to clamp is over the first drive 34 the middle part 17th the multi-part friction disc 16 the middle part 17th the opposite friction disc 16 delivered.

The outer ring 19th is briefly using the first drive 34 out of contact from the ring 23 brought and the thread separating means 44 , designed here as a thread winch, are driven by the third drive 42 driven in rotation and thus tear the upper and lower thread 31 , 32 . The thread winches 44 are then switched to reverse and the broken thread ends to the suction nozzle 12th or the gripper tube 25th hand over who dispose of the thread ends.

For cutting the upper or lower thread to length 31 , 32 become the thread winches 44 driven so that the upper and lower thread 31 , 32 each on the corresponding thread winch 44 is wound up. There upper and lower thread 31 , 32 at that moment turned up and through the middle parts 17th the friction disks 16 are jammed, the upper and lower threads tear 31 , 32 in that the fibers, which are almost parallel to each other due to the lack of rotation, guide apart.

The thread winches 44 are then switched to reverse immediately or after the thread connection has been established, and the torn thread ends of the upper and lower thread 31 , 32 to the suction nozzle 12th or the gripper tube 25th hand over who dispose of the thread ends.

After cutting to length, both the inner ring 18th as well as the outer ring 19th the multi-part friction disc 16 by means of the first drive 34 axially displaced and the opposite friction disc 16 with her middle part 17th and the ring 23 delivered. Both friction disks 16 have recesses 26th on, in the guide means 27 can intervene. This guide means 27 ensure that after removing the twist of the thread and cutting the upper and lower threads to length 31 , 32 the almost parallel alignment of the fibers is retained and the brush-shaped thread ends are centered or bundled, so that the fibers of the thread ends are rotated again in opposite directions 16 can be twisted together.

Before the friction discs 16 again by means of the second drive 35 in opposite directions of rotation to twist together the thread ends of the upper and lower thread 31 , 32 or applying the rotations are driven, causes the first drive 34 that the middle part 17th the multi-part friction disc 16 is shifted axially so that it is out of contact with the opposite central part 17th is spent.

Finally, the inner and outer ring 18th , 19th the multi-part friction disc 16 as well as the ring 23 the opposite friction disc 16 then by means of the second drive 39 rotates in the opposite direction so that the thread is approximately restored to its original twist.

The friction disks 16 are then by means of the first drive 34 opened and the thread released. The winding operation can then be continued.

List of reference symbols

1

Textile machine producing packages

2

Jobs

3

Spool and tube transport system

4th

Cop feed line

5

Storage range

6th

Cross transport line

7th

Sleeve return line

8th

Transport plate

9

Spinning cops

10

Thread joining device

11

casing

12

Suction nozzle

13

First pivot axis

14th

Reel drive drum

15th

Packages

16

Friction disc

17th

Middle part

18th

Inner ring

19th

Outer ring

20th

Second pivot axis

21st

Package transport device

22nd

Third pivot axis

23

ring

24

Winding device

25th

Grab tube

26th

Recesses

27

Guide means

28

Coil frame

29

Workstation computer

30th

Thread guide

31

Upper thread

32

Bobbin thread

33

Thread release agent

34

First drive

35

Segment wheel

36

Coupling rod

37

Screw jack

38

Second coupling rod

39

Second drive

40

transmission

41

Coupling shaft

42

Third drive

43

transmission

44

Thread winch

45

Headboard

46

Bus line

47

Central control unit

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• EP 0140412 A1 [0005, 0006]

Claims (7)

Thread connecting device (10) for the knot-free connection of two thread ends, with friction disks (16) for mechanically acting on the thread ends to be connected, which are rotatably mounted relative to one another and can be advanced and several thread separating means (33) are each provided for cutting a thread to length, characterized in that a of the friction disks (16) is constructed in several parts and has a middle part (17), an inner ring (18) and an outer ring (19), which are axially displaceably mounted so that the other friction disk (16) has at least one middle part (17) and one ring ( 23) has that a first drive (34) for the axial feed of at least the central part (17), the inner ring (18) and / or the outer ring (18) of the multi-part friction disc (16) is present, the first drive (34 ) a control is assigned that a second drive (39) for rotating the inner ring (18), the outer ring (19) and / or the ring (23) is present, the a control is assigned to the second drive (39), that a third drive (42) is provided for actuating the thread separating means (33), a control being assigned to the third drive (42), and that the controls of the drives (34, 39, 42) can be connected to a central control unit, via which the movement sequences of the drives (34, 39, 42) can be specified centrally. Thread connecting device (10) according to Claim 1 , characterized in that the extent of the axial distance between the friction disks (16) can be set in a defined manner via the first drive (34) while the threads are being acted upon. Thread connecting device (16) according to Claim 1 , characterized in that the angle of rotation of the friction disks (16) or the inner ring (18), the outer ring (19) and / or the ring (23) can be set in a defined manner via the second drive (39). Thread connecting device (10) according to Claim 1 , characterized in that the thread separating means (33) are designed as reversibly drivable thread winches (44) with a slotted head part (45). Thread connecting device (10) according to Claim 4 , characterized in that the revolutions of the thread winches (44) can be set in a defined manner via the third drive (42). Thread connecting device (10) according to Claim 1 , characterized in that the central control unit is a central control unit (47) of a textile machine (1) producing take-up bobbins. Textile machine producing take-up bobbins with thread connection devices (10) for the knot-free connection of two thread ends, characterized in that at least one thread connection device (10) according to Claim 6 is trained.

Images