EP2640653B1 - Device for winding up a thread - Google Patents

Description

The invention relates to a device for winding a thread according to the preamble of claim 1.

Such a device for winding a thread is z. B. from the DE 81 16 938 U1 known.

Such devices are preferably used for the continuous winding of a tapered thread. Here, the thread is wound on the circumference of a winding tube to form a coil. The winding tube is fixed on the circumference of a driven winding spindle, wherein the winding spindle is arranged upstream of a traversing device for reciprocating the yarn. The yarn is stored continuously after the oscillation by means of a pressure roller on the circumference of the coil to be wound.

Before the thread on the winding tube can be wound into a bobbin, it is necessary to catch the current thread and wrap. Here, the thread is usually passed through an auxiliary device that takes over the thread from the traversing device. These operations are required at each start of the process for winding the bobbin or when using two winding spindles held on a reel turret each time the reel spindles are changed.

As an auxiliary device, the known device has a movable guide plate, which has a leading edge and a guide groove, wherein the leading edge opens into the guide groove. By moving the guide plate from a laterally arranged next to the traversing device parking position in a lying in the traversing device transfer position, the acquisition of the thread of the Traversing device initiated. After the thread slides over the leading edge into the guide groove of the guide plate, the guide plate is held at the catching position and moved back to the parking position. The parking position of the guide plate is selected such that the thread comes into contact with the thread catcher on the winding spindle, so that a new winding cycle can begin. In this case, after the catching of the thread in the thread catcher, the guide plate is guided out of the parking position out again into the transfer position. After reaching the transfer position, the guide plate is guided into the release position, so that the thread is taken from the traversing device. The back and forth of the sheet between the takeover position and the parking position to take over and transfer the thread is relatively time-consuming, which has long change times result.

Since the stored in the lateral region of a bobbin thread reserve is used exclusively to knot in a follow-up process for further processing the yarn end of the bobbin with the yarn beginning a next coil, the Fadenreservewicklung is essentially determined by a minimum length of a piece of thread that allows unproblematic knotting. In that regard, the dwell time of the thread after catching in the catching device until it is taken over by the traversing device is decisive for the formation of the thread reserve winding.

In the known device, in addition to the long residence times, additional problems arise because the release of the thread takes place through the guide plate in the region of the traversing device. Thus, the thread could pass from the traversing device during the return movement of the guide plate back into the Fadenführungsnut of the guide plate.

From the EP 0 650 914 A1 It is also already known to use an auxiliary device with a movable guide plate and a leading edge when being wound, wherein the guide plate can be guided to a parking position laterally next to a traversing device.

It is an object of the invention to develop a device for winding a thread of the generic type such that reproducible pieces of thread with modifiable length as a thread reserve on the circumference of a winding tube can be wound.

Another object of the invention is to provide a generic device with the shortest possible change times in a bobbin change.

This object is achieved by the features of claim 1. Advantageous developments of the invention are defined by the features and feature combinations of the subclaims.

According to the guide sheet in the parking position is assigned a stationary pin thread guide, which cooperates with a guide shaft for guiding the thread with the leading edge or the guide groove of the guide plate.

An advantage of the invention is that the thread can be released immediately after catching in the thread catcher in the parking position. The leadership for the transfer of the thread and to form a thread reserve is essentially by the guide shaft of the pen thread guide, the thread automatically passes from the deflected position back to a traversing center. The rapid release of the thread already within the parking position of the guide plate also has the advantage that the thread tensile forces caused by deflection are immediately effective to the thread back to the thread to guide the trawling center. This effect is particularly advantageous in yarn catching devices which are formed on the circumference of the winding spindle, so that the yarn must be guided over the sleeve edge after catching. In that regard, the device according to the invention is preferably suitable for such thread catching devices, which are formed laterally next to the winding tube directly on the winding spindle. In the filing and formation of the Fadenreservewicklung or the filing of the thread piece required for the Anknoten has proven particularly useful that the Stiftfadenführer with the projecting guide shaft forms a thread guide track on which the thread after release from the guide groove of the guide plate can be guided. This essentially allows a winding time for depositing a piece of thread to be determined after catching the thread in the thread catching device. Only after passing through the thread guide track on the guide shaft is a complete release of the thread. It has been found that over the length of the guide shaft of the pin thread guide directly the length of the stored thread piece can be influenced in the Fadenreservewicklung, which is why the guide shaft of the pin thread guide according to the invention has an adjustable length.

For this purpose, the guide shaft is preferably arranged on a latching body, which can be guided within a latching holder in several latching positions.

In order to design the auxiliary device with as few moving means, the development of the invention is preferably used, in which the guide plate laterally next to the guide groove has a leading edge and in which the guide plate for catching the thread in a catch position and the release of the thread in a release position feasible is. Thus, all movements for catching and releasing the thread can be performed by the movements of the guide plate.

Thus, the guide plate can be transferred in the transfer position from the release position to the catch position in order to free the thread from the traversing device. After transferring the thread into the parking position, the guide plate in the parking position can be returned from the catching position to the release position in order to transfer the thread to the pin thread guide.

Alternatively, however, it is also possible to carry out the catching and transferring of the thread to the pen thread guide by a plurality of guide plates according to a further advantageous embodiment of the invention. Thus, two guide plates can be formed with two leading edges, which cooperate for catching and guiding the thread. It is particularly advantageous in this case that each guide plate is guided back and forth in only one direction of movement. Thus, one of the guide plates can be guided with a first leading edge for catching the thread in a catching position and for releasing the thread in a release position.

The second leading edge on the second guide plate is preferably formed transversely to the first leading edge of the first guide plate and transversely to the guide shaft of the pin thread guide to guide the thread from the transfer position to the parking position and release.

The device according to the invention is therefore characterized in particular by the fact that, in the case of a continuous winding of a tapering thread with a plurality of winding spindles, very short changeover times and reliable yarn transfer can be achieved. Thus, the thread pieces stored at the winding tubes can be set to a minimum for later knotting.

The device according to the invention is explained in more detail below with reference to an embodiment with reference to the accompanying drawings.

Fig. 1 und Fig. 2:

schematisch eine Seitenansicht des Ausführungsbeispiels der erfindungsgemäßen Vorrichtung in mehreren Betriebszuständen;

Fig. 3 und Fig. 4:

schematisch eine Draufsicht des Ausführungsbeispiels aus Fig. 1 in mehreren Betriebspositionen;

Fig. 5

schematisch eine Querschnittdarstellung eines Stiftfadenführers des Ausführungsbeispiels aus Fig. 1;

Fig. 6

schematisch eine Seitenansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Vorrichtung;

Fig. 7 und Fig. 8:

schematisch eine Draufsicht des Ausführungsbeispiels aus Fig. 6 in mehreren Betriebspositionen.

They show:

Fig. 1 and Fig. 2:

schematically a side view of the embodiment of the device according to the invention in several operating states;

3 and 4:

schematically a plan view of the embodiment of Fig. 1 in several operating positions;

Fig. 5

schematically a cross-sectional view of a pin thread guide of the embodiment Fig. 1 ;

Fig. 6

schematically a side view of another embodiment of the device according to the invention;

FIGS. 7 and 8:

schematically a plan view of the embodiment of Fig. 6 in several operating positions.

In the Fig. 1 to 4 an embodiment of the device according to the invention for winding a thread is shown schematically in several views and operating conditions. In Fig. 1 and Fig. 2 is a side view of the embodiment and in the 3 and 4 each show a plan view of the embodiment. Unless expressly made to any of the figures, the following description applies to all figures.

The device for winding a tapered thread 1 has a winding spindle 10. The winding spindle 10 is rotatably mounted on one side via a bearing 14 in a carrier and coupled to a spindle motor 13. The carrier is not shown in this embodiment and is usually formed by a turntable, which carries a second winding spindle, which is arranged offset by 180 ° to the first winding spindle is. Such carriers are particularly suitable for continuously winding a tapering thread into a coil. For this purpose, the winding spindles are alternately guided in a winding area and a change area. However, since it is irrelevant for the explanation of the invention whether a winding spindle or two winding spindles are held on the carrier, only one winding spindle 12 is explained in the embodiment shown.

At the periphery of the winding spindle 10, a winding tube 11 is clamped. The winding tube 11 is associated with a thread catcher 12 at the free end of the winding spindle 10, which is formed directly on the circumference of the winding spindle 10. Such thread catching devices 12 are well known and preferably have one or more fishing hooks to catch a tapered thread.

Axially parallel to the winding spindle 10 is at a small distance from the winding tube 11, a pressure roller 8 is arranged. The pressure roller 8 is rotatably supported by a shaft 9 in a machine frame. Above the winding spindle 10 and the pressure roller 8 a traversing device 3 is provided. The traversing device 3 consists in this embodiment of a traversing drive 4, which is connected to two oppositely driven rotors 5.1 and 5.2. At each of the rotors 5.1 and 5.2 traversing wings 6.1 and 6.2 are attached. The traversing vanes 6.1 and 6.2 are driven via the rotors 5.1 and 5.2 with opposite directions of rotation, wherein the free ends of the wings 6.1 and 6.2 are each guided along a guide ruler 7, on which a thread 1 through the traversing vanes 6.1 and 6.2 within a traverse stroke. and is producible.

Above the traversing device 3, a head thread guide 2 is arranged, which feeds the tapered thread 1 of the traversing device 3. Of the Head thread guide 2 is held in a traversing center of the traversing device 3 and forms the tip of a so-called Changierdreieecks.

Below the traversing device 3, an auxiliary device 15 is arranged, which is formed from a movably guided guide plate 16 and a stationary pin thread guide 19. As in particular from the 3 and 4 shows, the guide plate 16 has a traversing device facing the guide edge 17 and a guide groove 18. Here, the leading edge 17 opens into the guide groove 18. The guide plate 16 are associated with two drives, which are not shown. A first linear drive guides the guide plate 16 back and forth between a parking position and a transfer position. By a second drive, the guide plate 16 back and forth between a catch position and a release position.

In the in Fig. 1 to 4 illustrated situations, the guide plate 16 is held in a parking position laterally next to the traversing device 3. In the parking position, the guide plate 16 cooperates with the pen thread guide 19. For this purpose, the pen thread guide 19 has a projecting guide shaft 20, which covers the guide groove 18 of the guide plate 16.

At the in Fig. 1 to 4 illustrated embodiment of the device according to the invention, it is common that at the beginning of a winding, which is also referred to as winding cycle, the tapered thread must first be caught on the winding spindle 10. It is necessary that the thread is guided outside the traversing device 3 during catching. Regardless of whether the device has a winding spindle with manual operation or two winding spindles with automatic bobbin change, this process must be carried out again after each winding cycle. It is thus independent of whether that in Fig. 1 shown thread end picked up by a coil that has just been wound up or removed by a hand injector.

In order to start a new coil travel, therefore, the first thread 1 is led out of the traversing device 3. For this purpose, the guide plate 16 is guided from the parking position laterally next to the traversing device 3 in a transfer position in the region of the traversing device 3. In the Fig. 1 and 3 the guide plate is shown in dashed lines in the takeover position. In the transfer position, the leading edge 17 of the guide plate 16 passes below the guide ruler 7 in the region of the thread guide, so that the thread is guided automatically during the traversing over the leading edge 17 in the guide groove 18 of the guide plate 16. As soon as the thread 1 is immersed in the guide groove 18 of the guide plate 16, another drive, not shown here, of the guide plate 16 is activated in order to guide the guide plate 16 into a catching position, in which the thread is held out of the area of influence of the traversing wings 6.1 and 6.2. Subsequently, the guide plate 16 is returned by the linear drive in the parking position. In the Fig. 1 and 3 this situation is immediately represented. In the parking position of the guide plate, the guide shaft 20 of the pin thread guide 19 covers the guide groove 18 of the guide plate 16.

As in particular from the Fig. 1 As can be seen, in this situation, the tapered thread 1 is fed directly to the thread catcher 12 on the circumference of the winding spindle 10. For this purpose, an operator holding a manual injector 26 in a manual bobbin change such that the tensioned between the guide plate 16 and hand injector 26 thread piece of the thread catcher 12 is supplied to the circumference of the winding spindle 10.

In the event that a second winding spindle is held with a full bobbin on the spindle carrier, the thread guide on the discharge side of Winding spindle 10 executed by additional thread guide means. Thus, the thread 1 is detected by the catching means of the thread catcher 12. In this situation, the guide plate 16 is guided in the parking position from a tuck position back into the release position, so that the thread 1 from the Fadenführungsnut 18 slides and is initially held on the guide shaft 20 of the pin thread guide 19. This situation is particularly evident from the illustration in Fig. 4 seen. Now, the thread slides along the guide shaft 20 towards the traversing center. In this case, the thread 1 is guided by the catching device 12 on the winding tube 11 after catching. There is a threading of the thread 1 on the circumference of the winding tube 10 with a thread reserve, which is essentially formed by a partial turn. The thread 1 is detected when reaching the traversing device 3 of the traversing wings 6.1 and 6.2 and back and forth, so that the new winding cycle can begin. This process is shown in the illustration Fig. 2 shown.

The threading of the thread, especially at the first moment in which the thread reserve is formed, significantly influenced by the slowed leadership of the thread on the guide shaft 20 of the pin thread guide 19. In this case, the threading along the guide shaft 20 of the pin thread guide 19 is essentially caused by the tensile forces acting on the thread due to the deflection, which guide the thread back into the traversing center.

It has been found that the length of the guide shaft has a significant influence on the length of the deposited thread piece in the thread reserve, depending on the thread tenter and process. In that regard, the guide shaft 20 is variable in its length.

In Fig. 5 an embodiment of a possible pen thread guide 19 is shown, as he, for example, in the embodiment of Fig. 1 could be used. The pen thread guide 19 has a guide shaft 20 on, which is arranged on a latching body 21. The latching body 21 is held in a latch holder 22. The latching holder 22 has a latching element 24 loaded by a spring, which acts on a circumferential groove 25 of the latching body 21. On the latching body 21, an adjusting means 23 is provided on the opposite side to the guide shaft 20, so that by rotation of the latching body 21 via the adjusting means 23, the projecting length of the guide shaft 20 is continuously or in stages adjustable.

In the Fig. 5 illustrated embodiment of the pin thread guide is only an example. Thus, there is also the possibility that the detent holder has a thread in which an external thread of the detent is guided. In order to enable a gradual adjustment of the guide shaft, the locking body in addition to the thread on a second section with, for example, two axially aligned grooves, which cooperate with a locking element within the locking device. Thus, the locking body can be fixed in two positions per thread turn. For M12x1 threads, the length of the guide shaft could be adjusted in increments of 0.5 mm.

In the Fig. 6 . 7 and 8 is a further embodiment of the device according to the invention for winding a yarn shown schematically in several views and operating conditions. In Fig. 6 is a side view of the embodiment and in the FIGS. 7 and 8 in each case a top view of the embodiment shown from an underside. Unless expressly made to any of the figures, the following description applies to all figures.

This in Fig. 6 to 8 illustrated embodiment is substantially identical to the aforementioned embodiment according to Fig. 1 to 4 , so that at this point only the differences will be explained and otherwise reference is made to the above description.

At the in Fig. 6 to 8 illustrated embodiment, all components except for the auxiliary device 15 are identical to the aforementioned embodiment. The auxiliary device 15 consists in this embodiment of two movable guide plates 16.1 and 16.2, which are arranged below the guide ruler 7 and are assigned to take over the thread 1 of the traversing device 3.

As in particular from the representations in FIGS. 7 and 8 shows, the first guide plate 16.1 a first guide edge 17.1, which extends in an area between the traversing device 3 and a laterally arranged next to the traversing pen thread guide 19. In this case, a guide shaft 20 of the pin thread guide 19 projects into the area of influence of the guide edge 17.1 of the guide plate 16.1. The guide plate 16. 1 can be guided back and forth between a catching position and a release position in a first direction of movement. In Fig. 7 is the guide plate 16.1 in the catch position and in Fig. 8 shown in the release position.

The first guide plate 16.1 is associated with a second guide plate 16.2, which has a second guide edge 17.2 on an outwardly facing side. The guide edge 17.2 on the guide plate 16.2 is aligned transversely to the guide edge 17.1 of the guide plate 16.1 and transversely to the guide shaft 20 of the pin thread guide 19. The second guide plate 16.2 can be guided back and forth between a transfer position and a parking position. In Fig. 7 is the guide plate 16.2 in a takeover position and in Fig. 8 shown in the parking position.

The guide plate 16.2 has on the side facing away from the guide edge 17.2 a sliding edge 27 on which the thread slides along to take over to reach into the region of the leading edge 17.2. To explain the function of the auxiliary device 15 is first to the Fig. 7 Referenced. To guide the thread 1 out of the traversing device 3, the guide plate 16.1 is guided into the trapping position. At the same time the second guide plate 16.2 is moved to the transfer position, wherein the directions of movement of the guide plates 16.1 and 16.2 are directed orthogonal to each other. Each of the guide plates 16.1 and 16.2 is in each case assigned a separate actuator (not shown here). In the takeover position, the thread 1 guided by the wings 6.1 and 6.2 of the traversing device 3 is grasped by cooperation of the two guide surfaces 16.1 and 16.2 and subsequently guided along the guide edge 17.1 of the guide plate 16.1 by movement of the guide plate 16.2 in the direction of the pin thread guide 19. The leading edge 17.1 is formed in the catching position of the guide plate 16.1 such that the thread 1 is guided by progressive movement of the guide plate 16.2 behind the guide shaft 20 of the pin thread guide 19.

To release the thread is on the representation of the auxiliary device in Fig. 8 Referenced. Shortly before the thread is caught in a catching device of a winding spindle and a new winding operation can be started, the guide plate 16.1 is returned from the catching position to the release position. In this case, the thread is passed from the leading edge 17.1 to the guide shaft 20 of the pin thread guide 19, so that the thread guide, the second guide plate 16.2 and the pin thread guide 19 cooperate. A premature slipping of the thread from the leading edge 17.2 on the guide plate 16.2 can be prevented thereby. The guide plate 16.2 is now moved from the parking position in the direction of the transfer position, so that at the end of the guide shaft 20, a final release of the thread 1 takes place. The set length of the guide shaft 20 of the pin thread guide 19 determines the time when the thread is released and returns to the traversing device 3. This is especially the Period of time in which the thread is wound as a thread reserve affect.

At the in Fig. 6 to 8 illustrated embodiment, the operations for catching the thread and for winding the thread on a winding spindle are identical to the aforementioned embodiment, so that no further explanation is given at this point.

LIST OF REFERENCE NUMBERS

1

thread

2

Yarn guide

3

Traversing device

4

Traversing drive

5.1, 5.2

rotor

6.1, 6.2

Traversing wings

7

guide bar

8th

pressure roller

9

axis

10

winding spindle

11

winding tube

12

Thread catcher

13

spindle motor

14

camp

15

Help facility

16, 16.1, 16.2

guide plate

17, 17.1, 17.2

leading edge

18

guide

19

Pin thread guide

20

guide shaft

21

latching body

22

Rest holder

23

actuating means

24

locking element

25

groove

26

Handinjektor

27

sliding edge

Claims (7)

1. An apparatus for winding up a thread with at least one drivable spool spindle (10), which comprises at least one spool housing (11) and thread catch device (12) associated with the spool housing (11), with a changing device (3) for a back and forth movement of the thread, and with an auxiliary device (15) for guiding the thread during the catching and the winding up of the thread, wherein the auxiliary device (15) comprises at least one movable metal guide (16; 16.2) with a guide edge (17.2) or a guide groove (18) for the guiding of the thread, wherein the metal guide (16, 16.2) is associated with the changing device (3) and can be guided between receiving position in the region of the changing device (3) and a parking position at the side of the changing device (3),
   wherein the metal guide (16, 16.2) in the parking position is associated with a thread guide, which co-operates with a guide shaft (20) for guiding the thread with the guide edge (17.2) or the guide groove (18) of the metal guide (16, 16.2)
   and wherein the thread guide with the protruding guide shaft (20) forms a thread-guide track, on which the thread can be guided to be released from the guide edge (17.2) or from the guide groove (18) of the metal guide (16, 16.2), characterized in that the thread guide is a pin thread guide (19) and the guide shaft (20) of the pin thread guide (19) has an adjustable length.
2. The apparatus according to claim 1, characterized in that the guide shaft is (20) is arranged on a locking element (21) which can be moved into a plurality of locked positions within a latching holder (22).
3. The apparatus according to one of claims 1 or 2, characterized in the metal guide (16) comprises a guide edge (17) laterally adjacent to the guide groove (18) and that the metal guide (16) can be moved into a catching position to catch the thread and into a release position to release the thread.
4. The apparatus according to claim 3, characterized in that the metal guide (16) in the receiving position can be transferred from the release position into the catching position, and that the metal guide (16) in the parking position can be moved from the catching position into the release position.
5. The apparatus according to claim 4, characterized in that an overlap of the thread-guiding groove (18) formed by the pin thread guide (19) in the catching position is equal to an overlap of the thread-guiding groove (18) in the release position.
6. The apparatus according to one of claims 1 or 2, characterized in that two independently movable guided metal guides (16.1, 16.2) with two guide edges (17.1, 17.2) are provided, and that to catch the thread, one of the metal guide (16.1) with a first guide edge (17.1) can be moved into a catching position, and to release the thread, it can be moved into a release position.
7. The apparatus according to claim 6, characterized in that the second guide edge (17.2) is formed on the second metal guide (16.2) transverse to the first guide edge (17.1) of the first metal guide (16.1) and transverse to the guide shaft (20) of the pin thread guide 19.

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