RU2786664C1 - Ring-spinning system for producing yarn and method for ending the thread supply to the drawing stage of the ring-spinning system - Google Patents

Abstract

FIELD: spinning.

SUBSTANCE: invention relates to a ring-spinning system for producing yarn. Ring-spinning system (1) comprises a bobbin stand for retaining the bobbin (5) configured for a first thread (2) to be fed therefrom, a drawing stage (4) for drawing the first thread (2) together with a second thread (3) fed to the drawing stage (4), and a spindle. The ring-spinning system (1) also comprises at least one sensor (23, 24) for detecting a break in the first and/or second thread (2, 3) and/or the roving containing both the first and second threads (2, 3) and extending from the drawing stage (4), as well as a clamping unit (8) containing a clamp for securing the second thread (3) in the event that the sensor (23, 24) detects a break, wherein said clamp is provided near the bobbin stand. The clamping unit (8) herein is equipped with a knife element (19), wherein the knife element (19) and the clamp are adjacent to each other.

EFFECT: possibility of reconnecting broken threads if a break is detected in the first and/or second thread and/or the roving extending from the drawing stage.

28 cl, 5 dwg

Description

The present invention relates to a ring spinning system for the production of yarn.

For example, a known ring spinning system is described in EP 0016940 A1. Said document discloses a ring spinning system having a spindle, a draw stage and a bobbin holder. The bobbin, on which the thread is wound, is installed on the bobbin holder. The thread is guided through the drawing stage and spun in the ring spinning method on a spindle. In this system, a sensor detects a break in the roving exiting the draft stage during spinning. Upstream of the exhaust stage, a ring having a conical bore is provided. For this ring, a rotary lever is designed, having a plunger that matches the indicated hole. When the sensor detects a broken roving downstream of the drawing stage, the lever is actuated and the plunger enters the hole, whereby the filament supplied to the drawing stage is fixed. The end of the roving exiting the exhaust stage is sucked into the suction tube at the outlet of the exhaust stage. The system disclosed in EP 0016940 is a ring spinning system for single yarns.

In addition, ring spinning systems are known for double-filament and multi-filament yarns.

For example, EP 2 145 034 B1 discloses a ring spinning system in which a first and a second yarn are spun together in a ring spinning section to produce two-filament yarns. Said document discloses the situation where the first thread is an elastic thread and the second thread is an inelastic thread.

Such a two-ply yarn according to EP 2145034 B1 also has a cover layer made of staple fibers. The staple fiber roving is fed together with the first and second yarns and spun in the ring spinning process in the ring spinning section.

In general, the production speed of such ring spinning systems is very high. Sometimes yarn breaks occur upstream of the draw stage or rovings downstream of the draw stage. This may cause problems.

On the one hand, the broken end of the threads on the downstream side of such a break can move freely and can come into contact with the ring or spindle of the ring spinning system, whereby these elements can be damaged.

On the other hand, there is often the problem of reconnecting the broken ends of the yarns to further start ring spinning.

In light of this, the object of the present invention is to provide a ring spinning system in which, upon detection of a break in the first and/or second yarn and/or roving coming out of the drawing stage, the problem of damage to the system is reduced while reconnection of the broken yarns is facilitated.

To solve this problem, a ring spinning system is proposed, which has the features defined in paragraph 1 of the claims.

The ring spinning system according to the present invention is characterized by a nip assembly comprising a nip to secure the second yarn in case a breakage sensor detects it. The clamp is provided near the reel holder.

The ring spinning system, in particular, is a ring spinning system for double yarn and multi-filament yarn. Therefore, first and second filaments can be provided to be supplied to the drawing stage. When the sensor detects at least a break in one of the first and second threads supplied to the drawing stage and/or the roving coming out of the drawing stage, the clamp is actuated so that the second thread is fixed. The clamp is installed near the bobbin holder, on which the bobbin for the first thread is held. Since the second thread is fixed near the exit of the first thread fed to the drawing stage, in the event of a break, both threads can be easily picked up for reconnection with the yarn on the spindle.

In particular, the clamp assembly may include a mounting plate placed next to the bobbin. The mounting plate can be positioned perpendicular to the axis of rotation of the bobbin. The clamping unit also contains the first and second clamping levers, which are rotatable relative to each other around the axis. Each of the first and second clamping levers has a locking surface, between which the second thread is fixed when said clamp is actuated.

The clamping levers can be held under tension by means of a spring in such a way that the locking surfaces are pressed against each other. The locking surfaces may have a serrated configuration. When drawing the second thread with the spindle and/or the drawing stage, it is possible that the second thread passes freely between the first and second locking surfaces. For example, during breakage, the traction force applied to the second thread is reduced or completely eliminated, while the end of the second thread is still held between the locking surfaces. It is also possible that the locking surfaces in the first state are out of contact and are brought into contact by means of an electrically driven actuator to lock the end of the second thread. The mounting plate may have a generally flat shape. The mounting plate is configured to extend perpendicular to the axis of the bobbin. The mounting plate is made with the possibility of mounting the clamping levers to the system.

The respective first and second clamping arms project from the mounting plate and extend substantially in the plane of the mounting plate. With such a configuration, an assembly can be provided to allow the fixation of the second thread while at the same time approaching the location of the fixation of the second thread with the clamp to the bobbin.

A case is possible in which the first clamping lever and the second clamping lever are rotatably mounted on the mounting plate. Since both clamping arms are rotatably mounted on the mounting plate, it is easier to change the various elements. Alternatively, the first clamp arm may be rotatably mounted on the mounting plate, and the second clamp arm may be integral with the mounting plate. When the second clamp arm is an integral part with the mounting plate, the clamp assembly can be easily manufactured. The axis of rotation of the first and second clamping arms can be offset from the axis of rotation of the bobbin.

The mounting plate and/or the second clamping arm and/or the first clamping arm can be made from any material, such as a plastic material, for example by injection molding. A metallic material may also be used.

According to a further development, the mounting plate has a fixing hole adapted to fix the clamp assembly to a fixing rod provided in the ring spinning system. As a rule, the ring spinning system has different anchoring points. A rod can be used as the anchor point, which extends longitudinally through the entire system in such a way that adjacent lines of this system use the same anchor rod. Namely, the ring spinning system can have several ring spinning lines, whereby the bobbin holder, the draft stage and the spindle always define one ring spinning line. For example, the fixing rod extends horizontally through the various ring spinning lines and secures the mounting plate and thus the clamping unit. Namely, the fixing rod is fed through the fixing hole. Since a plurality of ring spinning lines are provided, each of several adjacent ring spinning lines may have the same configuration. Therefore, in the second ring-spinning line adjacent to the first ring-spinning line, a clamping assembly according to the invention and/or at least one break detection sensor can also be provided. With the configuration of the fixing hole cooperating with the fixing rod, it is possible to easily install the clamp assembly in the region of the reel holder.

It may be advantageous that the fixing rod is positioned offset from and parallel to the axis of rotation of the bobbin. For example, the axis of rotation of the bobbin extends approximately in the horizontal direction of the system, so that the axes of the bobbins located in different lines have one common axis of rotation, which runs transversely to the various ring spinning lines.

The entire clamping assembly can also be rotated around the fixing rod. If the clamping unit is rotatably mounted on the fixing rod, the mounting plate ensures separation of adjacent bobbins in different ring spinning lines. In this case, the bobbins are not fixedly mounted on these mounting plates, but are only separated from each other by means of these plates.

According to a further embodiment of the invention, the mounting plate may have a straight portion on which the knife element is mounted. The knife element is configured to cut the first thread at a point located in the region of the bobbin where it is fed from the bobbin to the drawing stage.

The straight part may be a part integral with the mounting plate and extends offset from and parallel to the axis of rotation of the bobbin.

When said at least one sensor detects a break, the knife element is configured to cut the first thread. This can be done in the following way. The mounting plate is actuated, for example by means of a drive, in such a way that it rotates around the anchoring rod, whereby the blade element moves in the radial direction relative to the anchoring rod. Thereby, the knife element contacts the first thread coming out of the bobbin and cuts this first thread. At the same time, the clamping element, also mounted on the mounting plate, fixes the second thread. Such fixation can be carried out as described above and, for example, by means of an electromechanical drive.

If the mounting plate is fixedly mounted on the fixing rod without being able to rotate, cutting the first thread with the knife member can be automatically performed due to the following. If a break occurs, the traction force of the first and/or second threads is reduced or completely eliminated. Thus, the direction of movement of the first thread from the bobbin to the drawing stage is changed. Reversing the direction of movement of the first thread may cause the first thread to come into contact with the knife element so that the knife element cuts the first thread.

In particular, such a configuration in which the first thread is cut by the blade member is preferable when the first thread is an elastic thread.

In this case, the break usually occurs in the second thread, which is a non-elastic thread.

Since the first thread is difficult to break, it is cut. Therefore, each of the free end of the first thread and the free end of the second thread can be easily reconnected to the downstream end provided in the spindle region.

Therefore, a corresponding straight part having a knife element is proposed. This knife element may be a blade having a cutting edge similar to a razor blade. This blade may be molded with a straight portion, or a removable connection may be provided between the blade and the straight portion.

Preferably, the straight part is perpendicular to the first and second clamping arms. Preferably, the straight part is an integral part of the mounting plate.

The mounting plate may also have a protruding part protruding from it, this protruding part being perpendicular to the straight part and also being perpendicular to the first and second clamping parts. This protrusion protrudes towards the front side of the system in a configuration in which the bobbin is mounted in such a way that the main body of the mounting plate is located between adjacent spools of different ring lines. The front side of the system is such a side when viewed against the direction of movement of the first and second threads.

The clamping unit, as well as the straight part having the knife element, can be manually actuated by the protruding part. For example, after the yarn is cut and the first and second clamp arms secure the second yarn, the protrusion can be grasped by an operator to rotate the mounting plate.

The ring spinning machine may also include first and second drive cylinders which rotate the bobbin. Typically, such first and second drive cylinders extend in the transverse or horizontal direction of the ring spinning system in such a way that the first and second drive cylinders simultaneously drive adjacent bobbins of different ring spinning lines. The outer surface of the respective reel is driven by the first and second drive cylinders while the reel is positioned between the first and second drive cylinders. The bobbin can be loosely mounted between the first and second drive cylinders and placed in the horizontal direction of the system between the respective mounting plates of the clamping units of adjacent ring spinning lines. Thus, the first and second drive cylinders can also serve as reel holders. The fixing rod, on which the mounting plate is mounted, may extend in the same direction as the first and second drive cylinders, and may also lie approximately in the same plane as the first and second drive cylinders.

Advantageously, a straight portion is provided between the first and second drive cylinders, on which the blade element is mounted. The first and second clamping arms protruding from the mounting plate are provided behind the first and second drive cylinders and are preferably located between the first drive cylinder and the fixing rod.

Said at least one sensor consists of a first sensor, which detects the breakage of the first thread, and a second sensor, which detects the breakage of the second thread. By combining two different sensors that detect the respective breakage of the respective thread, the performance of the detection can be increased.

Preferably, a second sensor is provided downstream of the first sensor.

In accordance with a further embodiment of the invention, the ring spinning machine may also comprise a pair of drive cylinders consisting of a third and a fourth drive cylinder. These third and fourth drive cylinders are configured to drive the second yarn when it is fed through at least one of said drive cylinders of this pair of drive cylinders. A pair of drive cylinders, consisting of the third and fourth drive cylinders, is located downstream of these first and second drive cylinders.

For example, the second thread moves along the underside of the peripheral surface of the third drive cylinder to a position where the peripheral surfaces of the third and fourth drive cylinders contact each other with the upper side of the peripheral surface of the fourth drive cylinder. This pair of drive cylinders for driving the second yarn is preferably installed upstream of the drawing stage and downstream of the first and second drive cylinders.

Generally, the term "first drive cylinder, second drive cylinder, third drive cylinder, and fourth drive cylinder" is used because the first drive cylinder is upstream of all of the respective cylinders and the fourth drive cylinder is downstream of all of the four cylinders. More than the four respective drive cylinders described can also be provided. In addition, the third and fourth driving cylinders, similar to the first and second driving cylinders, extend in the horizontal direction of the system.

Preferably, the first sensor is provided between the second and third actuating cylinders.

A second sensor, for example, is provided upstream of the exhaust stage and downstream of the cylinder pair of the third and fourth drive cylinders.

Instead of using two sensors, the detection can also be performed by one sensor for both threads.

The ring spinning system according to the present invention, in the event that at least one of the corresponding yarn breakage sensors is detected, is made with the possibility of fixing the second yarn at its free end with the specified clamp so that the free end of the second yarn is held between the fixing surfaces, and with the possibility of cutting with a knife element the first thread at the location where it is fed from the bobbin.

This actuation can be carried out by means of electronic control in such a way that when a break is detected, the clamping unit is actuated by means of a drive. Alternatively, this actuation may be performed mechanically such that the actuation is simply due to the loss of tractive force resulting from the breakage of at least one of the yarns or the roving.

In this case, the ring spinning system is driven by solenoid drives. Such a solenoid actuator may also be used to actuate the clamp assembly 8 or only parts of the clamp assembly such as the first and second clamp arms 10, 11 and/or the knife element.

The actuation described is only an example. Any method that implements the above adaptation can be used.

The draw stage may have first, second and third draw cylinders on which the first and second yarns are drawn together. Also in this case, the terminology "first, second and third draw cylinder" is used because the first draw cylinder is located upstream and the third draw cylinder is located downstream of all of the first, second and third draw cylinders. Alternatively, more than three or less than three draw cylinders may also be provided.

In particular, the first and second filaments are fed together to the first drawing cylinder, where said filaments are drawn together.

From the first to the third draw cylinders are inclined when viewed from the side along the axis of rotation of the reel. The inclination of the plane from the first to the third drawing cylinders is located approximately in the feed direction of the first and/or second threads.

A guiding device can also be provided upstream of the exhaust stage. The guide device is designed to guide the first and/or second thread. This guiding device is intended in particular to prevent uncontrolled free rebounding of the broken ends of the respective thread. Conversely, corresponding broken ends are guided by the guide device, and the risk of contact and damage to the ring or spindle is reduced.

The guiding device may have at least one opening through which the first and/or second thread is guided before it or them are fed to the drawing stage.

In accordance with a further development, the guide device has a lever having a first rod inclined with respect to the plane in which the first, second and third exhaust cylinders are located. This first arm may extend approximately in the direction of passage of the first and/or second thread.

It is possible that the first rod is provided with a first and preferably a second annular element, which is mounted on the side surface of the first rod, and this annular element or annular elements define an opening or openings through which the first and/or second threads are guided to her or them. supply to the exhaust stage. The first rod may have a first annular element. Optionally, there may also be a second annular element. The first and/or second annular elements are installed on the side surface of the first rod. Each annular element defines an opening through which the first and/or second threads are passed before they are fed to the drawing stage.

Each of the first and second threads can be guided through the respective one of the first and second annular elements one by one. Alternatively, two threads from the first and second threads can be guided together through one ring. If first and second annular elements are provided, for example, both threads can be guided together to the first and second annular elements located in the direction of movement of these threads one after the other.

Preferably, each annular element is mounted perpendicular to the direction in which the first and/or second threads are fed into the drawing stage. These ring elements provide guidance for the thread(s) and prevent the broken end from rebounding freely. Thus, damage to various parts of the system is prevented.

The guide arm may be generally V-shaped, with an annular element or annular elements provided on the first rod. The second shaft of the V-arm may be attached to an L-shaped fastener protruding in the region between the second and third draw cylinders and extending with its longer L-shape shaft in the same direction as the second and third draw cylinders.

Thus, the L-shaped short rod can extend perpendicular to the plane in which the first, second, and third drawing cylinders are located, and thus the V-arm can be mounted offset from the plane in which the first, second, and third are located. exhaust cylinders.

Preferably, a rod attached to the short side of the L-arm can extend offset from and parallel to the surface on which the first, second, and third draw cylinders are located.

The configuration mentioned above ensures good guidance of the first and/or second thread.

The annular element may consist of a bent wire element having a space through which the first and/or second threads can be inserted from its side. If such a curved wire member is provided with such space, it is not necessary to supply a corresponding thread in the longitudinal direction to the ring.

In accordance with a further embodiment, the ring spinning system according to the present invention has a plurality of ring spinning lines adjacent to each other, with each ring spinning line having its own spool holder, draw stage, spindle, sensor and nip assembly.

In particular, the first guide element of the first ring spinning line is installed opposite the second guide element, having the same design as the first guide element, and the second guide element is provided on the second ring spinning line immediately adjacent to the ring spinning line to which the first guide element belongs.

In addition, as a further aspect, a method is provided for stopping the supply of yarn to the draw stage of a ring spinning system. The method according to the invention includes the following steps: detecting the breakage of the first and/or second yarn and/or roving emerging from the draw stage and/or the final ring-spun yarn; holding the second thread between the fixing surface of the clamping element in such a way that the free end of the second thread is held between the fixing surfaces, and cutting with the knife element the first thread at the location where it is fed from the bobbin, the knife element and the clamping element being located next to each other in the bobbin area.

Any of the first and/or second yarn and/or roving emerging from the drawing stage and/or the final ring-spun yarn wound on the spindle may break. When such a break is detected, the second thread is held between the fixing surface of the clamping element, and the first thread is cut.

Furthermore, the method according to the present invention may also employ additional system configurations according to the present invention described in the previous section in a manner related to the method. Therefore, further discussion of this issue is omitted.

The system and method is preferably used and performed in a situation where the first thread is an elastic thread and the second thread is a non-elastic thread. However, more than two strands may also be used.

The use of an elastic yarn as the first yarn and a non-elastic yarn as the second yarn is not essential. It is also possible that the first thread 2 is an inelastic thread and the second thread 3 is an elastic thread. In addition, both threads may be elastic threads, or both threads may be non-elastic threads.

Additional preferred embodiments of the invention will be explained with reference to the drawings, in which

in fig. 1 shows one ring spinning line

ring spinning system according to the present invention,

in fig. 2 shows the clamping assembly of the system shown in FIG. one,

in fig. 3 is an enlarged view of a region of the system shown in FIG. 1, in which a guide element is provided,

in fig. 4 shows two adjacent guide elements of adjacent ring spinning lines,

in fig. 5 shows an alternative construction of adjacent guide elements of adjacent ring spinning lines.

In FIG. 1 is a schematic cross section showing one line of the ring spinning system 1.

In this case, the ring spinning system is a ring spinning system for the production of twin yarns. Accordingly, the first thread 2 and the second thread 3 are supplied to the drawing stage 4. The first thread 2 and the second thread 3 are drawn in the drawing stage 4. not shown in this figure). Although two threads have been described so far, the invention is not limited to two threads. Three, four threads and more than four threads can also be fed to the drawing stage 4. In addition, the finished yarn may have a cover layer made from staple fibers. In this case, the first thread 2 is an elastic thread, while the second thread 3 is an inelastic thread. The use of an elastic yarn as the first yarn and a non-elastic yarn as the second yarn is not essential. It is also possible that the first thread 2 is an inelastic thread and the second thread 3 is an elastic thread. In addition, both threads may be elastic threads, or both threads may be non-elastic threads.

As an elastic thread, elastane or other elastic synthetic and non-synthetic threads can be used. One such example is Spandex. Spandex has superior strength and durability. Spandex also has good dry heat and oil resistance.

As the inelastic thread, the following threads can be used, which do not have significant elasticity.

Examples are polyester, nylon (nylon 6, nylon 6.6), PBT (polybutylene terephthalate), viscose. You can also use any mixture of the above materials.

The thread can also be a partially oriented yarn (POY, partially oriented yarn) or highly oriented yarn (HOY, highly oriented yarn).

Partially oriented yarn is produced by melting and extruding (melt spinning) polyester chips or flakes. During the spinning process, the filaments are stretched or stretched to five times their original size to orient the polymer to achieve the desired properties of evenness, strength, shrinkage and elongation. Thus, the term "partially oriented yarn" refers to multifilaments that are only partially stretched. As a rule, POY yarn has less strength and less uniformity than fully oriented yarn (FOY, fully oriented yarn). POY yarns are mainly used in texturing to make textured yarns, and can also be used in warp draw for weaving and warp knitting of fabrics.

The first thread 2 is fed from the bobbin 5. The bobbin 5 is rotatably held between the first drive cylinder 6 and the second drive cylinder 7. FIG. 1 shows only part of the respective first drive cylinder 6 and the second drive cylinder 7. The respective drive cylinders 6, 7 extend in the horizontal direction of the system in such a way that the drive cylinders 6, 7 drive different reels 5 arranged in a row one after the other, each bobbin 5 is assigned to one ring spinning line.

These first and second drive cylinders 6, 7 can be driven by an actuator (not shown) to drive the bobbin 5. Such drive movement is created when the outer peripheral surface of the bobbin 5 is in contact with the outer peripheral surface of the first and second drive cylinders 6, 7, with the bobbin 5 installed between the first and second drive cylinders 6, 7.

When the drive cylinders 6, 7 rotate, the first thread 2 unwinds from the bobbin 5 and is fed to the drawing stage 4. A clamping unit 8 is provided near the bobbin 5.

The clamping assembly 8 consists of a mounting plate 9, a first clamping lever 10, a second clamping lever 11 and a straight part 12.

The configuration of the first clamp arm 10, the second clamp arm 11 and the straight portion 12 will be explained with respect to the clamp assembly 8 shown in FIG. 2 is enlarged.

The mounting plate 9 has a plate-like shape and in this particular example is provided between adjacent bobbins 5 or various adjacent ring spinning lines.

In FIG. 1 shows only one clamping unit 8. In order to provide a ring spinning system, the plurality of arrangements shown in FIG. 1 can be arranged one behind the other in the horizontal direction.

In the particular case shown in the drawings, the first clamping lever 10 is rotatably mounted on the mounting plate 9. In addition, a second clamping lever 11 is provided that rotates relative to the first clamping lever about a pivot axis 13 offset from the bobbin axis indicated in FIG. . 1 with reference R. The second clamping lever 11 is also rotatably mounted on the mounting plate 9. Alternatively, only one of these levers may be an integral part of the mounting plate.

The respective first and second clamping arms 10, 11 have at their distal end part first and second locking surfaces 15, 16, respectively. Between the respective first and second locking surfaces 15, 16, the second thread 3 is clamped in case a break is detected.

In FIG. 2 schematically shows how a second thread is guided between the first and second locking surfaces 15, 16.

The mounting plate 9 also includes a fixing hole 17 through which a fixing rod 18 passes. This fixing rod 18 (see Fig. 1) runs parallel and offset relative to the first and second drive cylinders 6, 7 in the horizontal direction of the respective ring spinning lines adjacent to each other. with friend. The clamping unit 8 is mounted by means of this fixing hole 17 on the fixing rod 18.

The straight portion 12 has a blade member 19 at a location where the straight portion 12 faces the outer peripheral surface of the bobbin 5. The blade member 19 may be in the form of a blade with a cutting edge. For example, this blade is molded as an insert into a straight portion 12, which is an integral part of the mounting plate 9.

In this case, the mounting plate 9, the straight part 11 and the first and second levers 10, 11 are injection molded parts from a plastic material. However, various materials such as a metallic material can also be selected. The straight part has a recess 20, in which a knife element 19 is provided, which, in the event of a breakage, cuts the first thread 2 in the region of the bobbin 5.

A protruding portion 21 extends from the front side of the mounting plate 9 and has an extended portion 22 through which the system operator can manually actuate the clamping assembly. The straight part 12 extends perpendicular to the plane of the mounting plate 9 and also perpendicular to the direction of passage of the first and second clamping levers 6, 7. When a break is detected, the second thread 3 is fixed between the first and second locking surfaces 15, 16. To improve the locking force applied to the second thread , one or more notches may be provided on the locking surfaces 15, 16.

The fixing of the second thread 3 is carried out simultaneously before or after the first thread 2 is cut by the knife element 19. This fixing and cutting can be electrically controlled so that the clamp assembly 8 rotates around the fixing rod 18 based on a signal from a control system not shown in the figures. . When the control system receives a signal from at least one sensor (sensors are described below) regarding the breakage, the clamping unit is activated in such a way that the first thread 2 is cut with a knife element 19, and the second thread 3 is held motionless between the fixing surfaces 15, 16 of the first and second clamp arms 10, 11. Such actuation can also be achieved without any computer-implemented control simply by a mechanical process automatically starting due to the fact that the pulling force acting on the first and/or second thread when the first and/or second thread breaks, it decreases or is completely eliminated.

In this case, the ring spinning system is driven by solenoid drives. Such a solenoid actuator may also be used to actuate the clamp assembly 8 or only parts of the clamp assembly such as the first and second clamp arms 10, 11 and/or the knife element.

For example, the second thread 3 is pulled through the locking surfaces 15, 16 with a certain force, in case these locking surfaces 15, 16 are clamped together. When this particular force is not provided, for example due to a break, the fixing surfaces 15, 16, for example having barbs, can fix the corresponding end of the second thread 3. Cutting the first thread 2 with the knife element can also be realized due to a change in the direction of movement of the first yarn. after its break. In addition, actuation kinematics are possible for clamping and cutting.

In this case, two sensor elements are provided, namely a first sensor 23 and a second sensor 24. The first sensor senses a break in the first thread 2. Any suitable sensor can be used for this sensor 23. The first sensor, referenced at 23, is only schematically shown in FIG. 1. In this case, the first sensor is installed near the second drive cylinder 7.

In addition, the system according to FIG. 1 comprises a pair of additional drive cylinders, hereinafter identified as third and fourth drive cylinders 25, 26. Said cylinders 25, 26 draw the second thread 3 and guide the second thread to the drawing stage 4.

In a specific example, the second thread 3 moves along the bottom surface of the third drive cylinder 25 to the area where the third and fourth drive cylinders 25, 26 contact each other with the top surface of the fourth drive cylinder 26, and from there to the drawing stage 4.

Between the second drive cylinder 7 and this pair of drive cylinders (the third and fourth drive cylinders 25, 26) driving the second thread 3, a first sensor 23 is provided.

The second sensor 24 is installed in the area of the third and fourth drive cylinders 25, 26 downstream of these third and fourth drive cylinders 25, 26. Using the second sensor 24, a break in the second thread 3 is detected.

Instead of using two sensors, as in this particular example, detection can also be performed by one sensor for both threads.

However, the described sensors are not essential to the present invention. Any configuration and arrangement of sensors can be used.

The drawing stage 4 consists of the first, second and third drawing cylinders 27, 28, 29. The first, second and third drawing cylinders 27, 28, 29 are located in the same plane P, which runs obliquely approximately in the feed direction of the first and second threads 2, 3 .

When viewed from the front side shown in FIG. 1 above, in the plane P of the first drawing cylinder, the second drawing cylinder and the third drawing cylinder 27, 28, 29 and in the region where the respective first and second threads 2, 3 are fed to the drawing stage 4, a so-called guide device 30 is provided. is intended for directing at least one of the first and/or second thread 2, 3 to the drawing stage 4. In the event of a break being detected, the guide device 30 also prevents the downstream broken end of the first and/or second thread 2, 3 from rebounding freely. the kickback may damage the draw stage and/or the ring or spindle provided downstream of the draw stage 4.

An enlarged view of the guide device 30 is shown in FIG. 3. This guide 30 is composed of a lever 31 having a generally V-shape and an L-shaped fastener 32. This L-shaped fastener 32 has a longer shaft 33 and a shorter shaft 34. The longer shaft 33 is installed at its distal end to a plate element extending perpendicular to the direction of passage of the first, second and third drawing cylinders 27, 28, 29. The longer rod 33 extends in the same direction as the second and third drawing cylinders 28, 29, and offset from them in the area between the second and third exhaust cylinders 28, 29.

The shorter rod 34 extends perpendicular to the plane P in which the first, second and third drawing cylinders 27, 28, 29 are located. At the far end of the shorter rod 34, the second rod 37 of the V-shaped arm 31 is mounted. The first rod 36 of the V-shaped lever 31 inclined at an arcuate angle with respect to the plane P defined by the first, second and third exhaust cylinders 27, 28, 29.

On the side surface facing the adjacent ring-spinning line, the first rod 37 in this case has two annular elements 38, 39, namely the first annular element 38 and the second annular element 39. The first annular element 38 is provided upstream of the second annular element 39. In In this case, both of the first and second threads 2, 3 are guided through the first and second annular elements 38, 39. It is also possible that only one of the respective threads 2, 3 is directed towards only one annular element, or that only one annular element is provided, wherein two threads are fed through this one annular element. Any configuration with one or more annular elements can be provided in which only one or more than one thread is guided through the annular elements.

The first rod 36 of the V-shaped lever 31 has an offset part 40, on which ring elements 38, 39 are mounted. In addition, the second rod 37 has a corresponding offset part, with which the lever is mounted on a shorter rod 34 of the L-shaped fastener 32. Thus, the V-arm 31 is provided with a main body 41 offset from the respective distal ends of the first and second rods 36, 37. This configuration is proposed in consideration of space requirements.

In FIG. 4 shows a situation in which, in addition to this guiding device 30 shown in FIG. 3, a second guiding device 30' of an adjacent ring-spinning line is provided immediately adjacent to the ring-spinning line shown in FIG. one.

Respective annular elements 38, 39 are provided on the surfaces of the respective first rods 36 of the first and second guide devices 30, 30', which face away from each other.

In FIG. 5 shows an alternative configuration of two guide devices 30, 30'. The offset configuration of the first rod 36 is similar. However, the lever is not V-shaped like the V-shaped lever 31 in the other embodiments shown in the figures. Moreover, in the case shown in FIG. 5, the annular element is made of bent wires having a hole 42 on their side surface. Through this hole 42 it is easier to insert the respective first and second threads 2, 3. Also in the case shown in FIG. 5, as in the example shown in FIG. 4, two adjacent guides of adjacent ring spinning lines are shown.

List of reference designations

Ring spinning system 1

First thread 2

Second thread 3

Extract stage 4

Reel 5

First drive cylinder 6

Second drive cylinder 7

Clamping unit 8

Mounting plate 9

First clamping lever 10

Second clamping lever 11

Straight part 12

Axis 13 turn

R-axis bobbin

First fixing surface 15

Second fixing surface 16

Fixing hole 17

Fixing rod 18

Knife element 19

Recess 20

Protruding part 21

Extended part 22

First sensor 23

Second sensor 24

Third drive cylinder 25

Fourth drive cylinder 26

First exhaust cylinder 27

Second exhaust cylinder 28

Third exhaust cylinder 29

Plane P

Guide device 30, 30'

V-arm

L-shaped fastener 32

longer rod 33

shorter rod 34

plate element 35

first rod 36

second rod 37

ring element 38, 39

offset part 40

main body 41

hole 42

Claims (40)

1. Ring spinning system (1) for the production of yarn, containing a bobbin holder for holding a bobbin (5) configured to supply the first thread (2) from it, a draw stage (4) for drawing the first thread (2) together with the second thread (3) supplied to the draw stage (4), and a spindle provided downstream of the drawing stage (4), made with the possibility of winding on it the yarn made by the ring spinning method, characterized in that ring spinning system (1) also contains at least one sensor (23, 24) for detecting breakage of the first and/or second threads (2, 3) and/or roving containing the first and second threads (2, 3) and leaving the drawing stage (4), and a clamp assembly (8) containing a clamp for fixing the second thread (3) in the event that the sensor (23, 24) detects a break, and the specified clamp is provided near the bobbin holder, while the clamping assembly (8) is provided with a knife element (19), with the knife element (19) and the clamp located next to each other. 2. Ring spinning system (1) according to claim 1, characterized in that the clamping unit (8) contains a mounting plate (9) placed near the bobbin (5), and the mounting plate (9) is located perpendicular to the axis of rotation of the bobbin (5) such so that the axis (R) of rotation of the bobbin (5) passes through the mounting plate (9), and the first and second clamping levers (10, 11) are rotatable relative to each other around the axis, each of the first and second clamping levers ( 10, 11) has a fixing surface (15, 16) for fixing the second thread (3) between them. 3. Ring spinning system (1) according to claim 2, characterized in that the first clamping lever (10) and the second clamping lever (11) are rotatably mounted on the mounting plate (9). 4. Ring spinning system (1) according to claim 2 or 3, characterized in that the mounting plate (9) has a fixing hole (17) configured to fix the clamping unit (8) on the fixing rod (18) provided in the ring spinning system (one). 5. Ring spinning system (1) according to claim 4, characterized in that the fixing rod (18) is located offset from the axis (R) of rotation of the bobbin (5) and parallel to it. 6. Ring spinning system (1) according to any one of paragraphs. 2-5, characterized in that the mounting plate (9) has a straight part (12) on which the knife element (19) is mounted, and the knife element (19) is configured to cut the first thread (2) at a point located at that area of the reel (5), where it is fed from the reel to the exhaust stage (4). 7. Ring spinning system (1) according to claim 6, characterized in that the straight part (12) is located perpendicular to the first and second clamping levers (10, 11) and the mounting plate (9), and is also preferably a one-piece part mounting plate (9). 8. Ring spinning system (1) according to claim 6 or 7, characterized in that the mounting plate (9) has a protruding part (21) extending from it, as well as passing perpendicular to the straight part (12) and perpendicular to the first and second clamping levers (10, 11). 9. Ring spinning system (1) according to any of the previous paragraphs, characterized in that it also contains the first and second drive cylinders (6, 7) made with the possibility of rotation of the bobbin (5), and the outer surface of the bobbin (5), which is wound the first thread (2) is rotatably driven by the first and second drive cylinders (6, 7), and the bobbin (5) is installed between the first and second drive cylinders (6, 7). 10. Ring spinning system (1) according to claim 9, characterized in that the straight part (12) is provided between the first and second drive cylinders (6, 7), and the first and second clamping levers (10, 11) are provided behind the first and second drive cylinders (6, 7). 11. Ring spinning system (1) according to any one of the preceding claims, characterized in that said at least one sensor (23, 24) consists of a first sensor (23) configured to detect the breakage of the first thread (2) and a second sensor (24) configured to detect the breakage of the second thread (3). 12. Ring spinning system (1) according to claim 11, characterized in that the second sensor (24) is provided downstream of the first sensor (23). 13. Ring spinning system (1) according to claim 9 or 10, characterized in that it also contains a pair of drive cylinders, consisting of a third and fourth drive cylinders (25, 26) and configured to bring the second thread (3) when it is fed along through at least one of said third and fourth drive cylinders (25, 26), with a pair of drive cylinders consisting of the third and fourth drive cylinders (25, 26) located downstream of the first and second drive cylinders (6, 7) . 14. Ring spinning system (1) according to claim 13, characterized in that the second drive cylinder (7) is provided downstream of the first drive cylinder (6), the third drive cylinder (25) is located downstream of the second drive cylinder (7 ), and a fourth drive cylinder (26) is provided downstream of the third drive cylinder (25), wherein a first sensor (23) is provided between the second and third drive cylinders (7, 25). 15. Ring spinning system (1) according to claim 13, characterized in that the second sensor (24) is provided upstream of the drawing stage (4) and downstream of the third and fourth drive cylinders (25, 26). 16. Ring spinning system (1) according to any of the previous paragraphs, characterized in that in the event that at least one of the sensors (23, 24) detects a breakage of the corresponding thread (2, 3), it is made with the possibility of fixing the second thread (3) with the specified clip at its free end in such a way that the free end of the second thread (3) is held between the fixing surfaces (15, 16), and with the possibility of cutting the knife element (19) of the first thread (2) at the location where it is fed from the bobbin (5 ). 17. Ring spinning system (1) according to any one of the preceding claims, characterized in that the drawing stage (4) comprises first, second and third drawing cylinders (27, 28, 29) configured to draw the first and second yarns (2, 3 ) together, wherein the second exhaust cylinder (28) is provided downstream of the first exhaust cylinder (27), the third exhaust cylinder (29) is provided downstream of the second exhaust cylinder (28), wherein the first, second and third exhaust cylinders ( 27, 28, 29) are located in the same plane (P), inclined approximately in the feed direction of the first and second threads (2, 3). 18. Ring spinning system (1) according to any one of the preceding claims, characterized in that it also comprises a guiding device (30, 30') for guiding the first and/or second yarn (2, 3), wherein the guiding device (30, 30') installed upstream of the exhaust stage (4). 19. Ring spinning system (1) according to claim 18, characterized in that the guide device (30, 30') has at least one hole (42) configured to guide the first and/or second thread (2, 3) through it. ) before it or their supply to the exhaust stage (4). 20. Ring spinning system (1) according to claim 18 or 19, characterized in that the guide device (30, 30') has a lever having a first rod (36) inclined with respect to the plane (P) in which the first, second and third drawing cylinders (27, 28, 29), wherein the first rod (36) extends approximately in the direction of passage of the first and/or second thread (2, 3). 21. Ring spinning system (1) according to claim 20, characterized in that the first rod (36) is provided with a first and preferably a second annular element (38, 39), which is mounted on the side surface of the first rod (36), and this annular element (38, 39) or annular elements (38, 39) define an opening (42) or openings made with the possibility of directing the first and/or second thread (2, 3) through it or them before it or them are fed to the drawing stage ( 4). 22. Ring spinning system (1) according to claim 21, characterized in that the ring element (42) is mounted perpendicular to the direction of supply of the first and/or second yarn (2, 3) on the drawing stage (4). 23. Ring spinning system (1) according to any one of paragraphs. 20-22, characterized in that said lever has a generally V-shape, and on the first rod (36) an annular element (38, 39) or annular elements is provided, the second rod (37) of the V-shaped lever (31) is attached to an L-shaped fixing element (32) protruding in the area between the second and third drawing cylinders (28, 29) and extending with its longer L-shaped rod (33) in the same direction as the second and third drawing cylinders (28, 29). 24. Ring spinning system (1) according to claim 21, characterized in that the ring element (38, 39) consists of a bent wire element having a space configured to insert through it from its side the first and/or second thread (2, 3). 25. Ring spinning system (1) according to any of the preceding claims, characterized in that it has a plurality of ring spinning lines, each of which has its own bobbin holder, draft stage, spindle, at least one sensor and clamping unit. 26. Ring spinning system (1) according to claim 25, characterized in that the guide device (30) is installed opposite the second guide device (30') having the same design, and the second guide device (30') is assigned to the ring spinning line immediately adjacent to ring spinning line to which the specified guide device (30) belongs. 27. A method for stopping the supply of threads (2, 3) to the exhaust stage (4) of the ring spinning system (1), including the following steps: detecting breakage of the first and/or second yarn (2, 3) and/or the roving emerging from the drawing stage and/or the final ring-spun yarn; holding the second thread (3) between the fixing surfaces (15, 16) of the clip so that the free end of the second thread (3) is held between the fixing surfaces (15, 16); and cutting with a knife element (19) of the first thread at the location where it is fed from the bobbin (5), moreover, the specified clip is provided near the bobbin holder, and the knife element (19) and the clip are located next to each other. 28. The method according to claim 27, wherein the first thread (2) is an elastic thread and the second thread (3) is a non-elastic thread.

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