EP3135618B1 - Method for suction of a yarn from a spool and corresponding device - Google Patents

Description

The invention relates to a method for sucking a thread from a bobbin and for restarting a thread end to a new thread, wherein the thread is sucked against its Aufspulrichtung by a suction nozzle in a suction, then a loop is formed, the thread separated in the loop which discharges one end of the thread into the suction and prepares the other end of the thread coming from the reel for re-setting and then attaches it to a new thread, as well as a device for sucking a thread from a reel and for re-setting a thread end to a new thread, with a suction nozzle, a suction device, a device for forming a loop, a thread separating device and a thread preparation device.

From the EP 1 283 288 A2 For example, a spinning device of an open-end rotor spinning machine is known. A thread is spun in an open-end spinning device and delivered to a winding device. For defined laying of the supplied thread on a spool, a single motor driven Fadenchangiereinrichtung is provided. After a thread break the resulting thread end is wound onto the spool. In order to use this end of the thread to re-start with a new thread, it must be searched on the spool. For this purpose, a pivotally mounted, unterdruckbeaufschlagbare suction nozzle is provided. The suction nozzle pivots in the event of a yarn breakage from a lower position up to the coil circumference of the coil and insufflates it. The coil is set in a rotational movement, so that after a certain time, the thread end is detected and sucked by the suction nozzle. Subsequently, further manipulations take place in order to use the thread end for the restart. The thread end is for this purpose of the suction nozzle hand over other facilities. This procedure is time-consuming, since the suction nozzle must first be set in motion and the thread end found must be transferred by appropriate movements to the other handling devices. In addition, the structural complexity and the required space are significant.

From the DE 10 2013 102 770 A1 For example, a method is known in which a thread is prepared for reattachment by creating a loop using a lever. The document also discloses a corresponding device.

The object of the present invention is thus to be able to carry out a simple and quick reinstatement of a thread end to a new thread.

The object is achieved with a method and a device having the features of the independent claims.

In the method according to the invention for sucking a thread from a spool and for restarting a thread end to a new thread, the thread is sucked against its Aufspulrichtung by a suction nozzle in an exhaust system. Subsequently, a loop is formed and the thread is separated in the region of the loop. The one end of the thread is removed into the suction and the other, coming from the coil end of the thread is prepared for reattachment and then attached to a new thread. According to the invention, the thread is guided during suction through an eye located in the threadline of the suction in the suction nozzle eyelet and the eyelet is moved together with the thread from the threadline of the suction out of the suction nozzle, so that the thread a loop between the coil, the eyelet and the suction forms.

With the method according to the invention, the thread end is taken up in the eyelet during suction and rewinding of the spool so as to be able to form a loop. The loop is moved out of the threadline of the returned thread with the eyelet and pulled until it is in a position in which the thread can be further treated. This further treatment is done for example by separating the thread, so that one end can be used for refitting while the other end is drained into the suction. Due to the largely automatic threading of the thread in the eyelet handling is much easier and can be performed quickly and reliably.

In a preferred embodiment of the method, the movement of the eyelet is generated by a pivoting movement and / or a displacement along a guide. It is on the one hand in the suction nozzle, in particular while the thread is rewound and threaded into the eyelet. As soon as the thread is in the eyelet, it is moved out of the suction nozzle and brought to a place where the further treatment of the thread can take place. The movement of the suction nozzle can be generated by pivoting a holder to which the eyelet is attached. Alternatively or additionally, the eyelet can also be moved or displaced along a guide, whereby simple linear, but also more complex movements can be generated.

In a particularly advantageous embodiment of the invention, the eyelet is during the threading of the thread within the suction nozzle. In order not to reduce the effectiveness of the suction nozzle is provided in an advantageous embodiment of the method according to the invention that the eyelet or components arranged thereon at least temporarily seal the suction nozzle during suction of the thread. If the eyelet is thus located inside the suction nozzle, an optimum vacuum is applied to the mouth of the suction nozzle in order to be able to locate and vacuum the thread end on the coil surface.

To form the loop, it is advantageously provided that the thread is pulled over at least one edge, preferably two edges. These edges together with the eyelet define the position of the loop. This makes it possible that further handling devices, such as a Separating device or a thread preparation device, can be selectively brought into contact with the loop.

If the eyelet is located on one side of the at least one edge and the loop on the other side of the at least one edge when sucking the thread through the eyelet, the thread is pulled over this edge when the eyelet from the one side to the moved on the other side of the edge. The loop thus forms in a defined manner and can then be selectively treated further.

In order to be able to predetermine the position of the thread or the loop, it is provided that the thread is guided by means of the eyelet in at least one predetermined position transversely to the movement of the eyelet. This can be done by means of oblique guides within the eyelet or grooves therein. The thread, which is wound crosswise on the spool and is found in an unpredictable position on the surface of the spool, is thereby brought into a predetermined position in order to be able to use the further handling devices in a targeted manner.

Leads the eyelet when sucking the thread the thread in a first position and when forming the loop, especially when pivoting and / or moving the eyelet, in a second position, so helps this measure, the thread or the loop defined position and to be able to hand over to other handling equipment or bring to a new position or to connect with a new thread end in a suitable position.

If, in a particularly advantageous embodiment of the invention, the thread is guided adjacent to the eyelet through a multi-valve, then a loop can optionally be formed when the thread is sucked off or when the thread is re-attached. The multi-valve is switched so that it opens or closes Saugrohranschlüsse or threadlines.

In order to be able to always handle the thread or the thread end, the thread end coming from the bobbin is clamped at the latest immediately after the separation between delivery rollers. The delivery rollers may optionally move in the direction of delivery of the thread or in the opposite direction to return the thread. This makes it possible to return the yarn, for example, when applied in a spinning station in this or deduct after re-setting from the spinning station and to deliver to the coil.

If the thread is guided during the suction of the coil and on delivery to the coil through the particular fixed suction nozzle, so the suction nozzle does not have to be moved and thus contributes to a quick and easy location of the thread end on the surface of the coil and restarting the thread end a new thread successfully.

A device according to the invention for sucking a thread from a spool and for re-setting a thread end to a new thread comprises a suction nozzle for receiving a thread from the spool, a suction device for sucking the thread against its Aufspulrichtung in the suction, a means for forming a loop, a thread separating device in order to be able to separate the thread in the region of the loop and a thread preparation device in order to be able to prepare the thread for re-setting. The renewal of a thread end to a new thread can be done for example in a spinning device, such as an open-end rotor spinning device. Alternatively, it is also possible to use the device when re-attaching to a winder, in which an existing thread is connected to the thread end which has been taken up by the reel surface, for example by means of a splicing device. The yarn preparation device can, for example, work pneumatically or mechanically and the yarn end accordingly prepare for a successful and high-quality restart.

If the device according to the invention has an eyelet arranged in the yarn path of the suction, in particular in the suction nozzle, in order to be able to carry the thread through it during suction, then the thread is already threaded into the loop during suction of the thread end from the coil surface and can thus be transferred without transfer be further processed to another handling device. A fast and safe handling of the thread is thereby ensured, since no handovers in which errors can occur must be made.

The eyelet is arranged on a movable holder in order to move it together with the thread from the threadline of the suction can. As a result, the thread forms a loop between the spool, the eyelet and the suction. In this loop, further handling devices, such as a separator, intervene to perform the further handling of the thread until it can be restarted.

Most preferably, the holder is pivotally and / or slidably mounted together with the eyelet. As a result, the eyelet with a simple movement out of the suction nozzle is movable and can span the thread so that a loop is formed. The pivoting movement can lead the thread from the suction nozzle to the thread preparation device and the thread separating device. The handling of the thread until it is restarted is done quickly and without errors. For simple linear but also more complex movements of the eyelet, in particular for turning the eyelet, the holder can be slidably mounted. This can be done space-saving guidance of the eyelet.

If, in an advantageous embodiment of the invention, the holder is guided in a slot, then the holder and thus the eyelet can carry out targeted movements, which are particularly suitable for handling the thread and are optimally adapted with respect to the path to the conditions of the job. If the holder is articulated, it can cover the working area as a kind of blind when it enters the suction nozzle.

In order to operate the suction nozzle as effectively as possible, i. so that the negative pressure as possible rests against the coil surface and remove the thread end of the coil surface and to be able to carry in the suction, it is advantageous if the arranged on the suction nozzle eyelet or associated components, the suction nozzle at least temporarily seals the suction of the thread. The suction nozzle, which preferably has an opening into which the eyelet can dip, thus becomes a suction channel, which preferably leads directly into the suction, but with the eyelet within the suction channel is such that the sucked thread is passed through the eyelet ,

Located adjacent to the eyelet at least one edge, preferably even two edges, so the thread can be formed in a largely defined position to a loop. In addition, it is also achieved that a certain retention force is generated in order to keep the loop taut.

If the eyelet when sucking the thread through the eyelet on one side of the at least one edge arranged and the eyelet is the other hand, when forming the loop on the other side of the at least one edge, so by the movement of the eyelet from the suction out of the thread pulled over this edge. Both the position and the tension of the thread can thereby be optimally formed.

If the eyelet has guides in order to be able to guide the thread transversely to the movement of the eyelet in at least one predetermined position, then the thread or the loop can be positioned very precisely. This is advantageous because under certain circumstances the thread preparation device or the thread separating device can be arranged stationary and the thread is thereby always positioned in a defined position in the eyelet.

If one of the guides is arranged on the inside of the eyelet and the other guide on the outside of the eyelet, then the thread is passed through both guides in particular during a pivoting movement of the eyelet and forms a tensioned loop. Between the loop further handling devices, such as the thread separator can be introduced. The thread piece running towards the spool can thus be separated from the piece of thread which leads into the suction and processed separately.

If an evacuated multi-valve is arranged adjacent to the eyelet, a loop can optionally be produced when the thread is sucked off or when the thread is re-attached. In the multi-valve different suction ports are arranged. During the formation of a loop during the suction of the thread from the bobbin surface, the thread end, which is to be discharged, is introduced into the one suction port. On the other hand, when re-setting it may be necessary to create a thread loop of the thread supplied to the bobbin in order to be able to compensate for certain differences in length. In this case, it is advantageous if a thread loop is inserted into the other suction port. After re-starting, it is then usually no longer necessary to form this loop. It can be dissolved and the thread runs in the normal delivery direction on the spool.

Particularly preferably, the multi-valve comprises two nested, rotatable and slotted tubes. By the mutual twisting of the two tubes, the slots can be opened or covered or suction tube connections can be opened or closed.

If the outer tube of the multi-valve has one, preferably two suction ports, these can be opened or closed by the inner tube, depending on its rotational position.

If one of the suction ports is provided to receive the yarn during suction from the spool and the other suction port is provided to receive the yarn upon delivery to the spool, the multi-valve can perform various functions which provide benefits both in reattaching and spinning ,

If the multi-valve and the slots are arranged such that the thread passes through the slots in the delivery to the coil, the handling of the thread when re-attaching is particularly easy to perform. In this case, the multi-valve always remains in the area of the thread run and can therefore be used quickly.

Figur 1a

die Lieferung eines Fadens von einer Spinnstelle zu einer Spule,

Figur 1b

eine in die Saugdüse eingeschwenkte Öse,

Figur 1c

einen in die Öse eingefädelten Faden,

Figur 1d

die Bildung einer Schlaufe,

Figur 1e

die Schlaufe vor der Spinnstelle,

Figur 1f

das Trennen der Schlaufe,

Figur 1g

das Wiederansetzen des Fadens,

Figur 2

eine Öse mit Fadenführungen,

Figur 3

eine Fadenführung,

Figur 4a

die Lieferung eines Fadens von einer Spinnstelle zu einer Spule,

Figur 4b

eine in die Saugdüse eingeschwenkte Öse,

Figur 4c

einen in die Öse eingefädelten Faden,

Figur 4d

die Bildung einer Schlaufe,

Figur 4e

die Schlaufe vor der Spinnstelle,

Figur 4f

das Trennen der Schlaufe,

Figur 4g

das Wiederansetzen des Fadens,

Figur 5a

ein Multiventil in Spinnstellung,

Figur 5b

das Multiventil in Fadenabsaugstellung,

Figur 5c

das Multiventil in einer Stellung zur Schlaufenbildung beim Wiederansetzen,

Figur 5d

das Multiventil in einer Stellung zur Bildung einer Fadenschlaufe im normalen Fadenlauf und

Figur 6

eine in die Saugdüse eingeführte Öse.

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

FIG. 1a

the delivery of a thread from a spinning station to a spool,

FIG. 1b

an eye pivoted into the suction nozzle,

Figure 1c

a thread threaded into the eyelet,

Figure 1d

the formation of a loop,

Figure 1e

the loop in front of the spinning station,

FIG. 1f

separating the loop,

Figure 1g

the reinstatement of the thread,

FIG. 2

an eyelet with thread guides,

FIG. 3

a thread guide,

FIG. 4a

the delivery of a thread from a spinning station to a spool,

FIG. 4b

an eye pivoted into the suction nozzle,

Figure 4c

a thread threaded into the eyelet,

FIG. 4d

the formation of a loop,

Figure 4e

the loop in front of the spinning station,

FIG. 4f

separating the loop,

Figure 4g

the reinstatement of the thread,

FIG. 5a

a multi-valve in spinning position,

FIG. 5b

the multi-valve in thread extraction position,

FIG. 5c

the multi-valve in a position for looping when restarting,

FIG. 5d

the multi-valve in a position to form a thread loop in the normal yarn path and

FIG. 6

an eyelet inserted into the suction nozzle.

In FIG. 1a a yarn path of a thread 1 from a spinning station 2 to a coil 3 is shown. The coil 3 is driven by means of a winding roller 4 in the arrow direction. In the spinning station 2, a thread is produced, which is then wound up on the bobbin 3. Instead of the spinning station 2, the device described can also be used on winding machines, in which the yarn is unwound from a ring spinning spool and wound up on the spool 3 in a crosswise manner.

From the FIG. 1a it can be seen that the thread 1 enters and passes through an opening 5 of a suction nozzle 6. In the normal delivery operation, the thread 1 is thus at least in a partial region of the suction nozzle 6. This facilitates, for example, in a yarn breakage, in which the yarn end is wound onto the bobbin 3, the rapid finding of the yarn end and the reassembly of a new thread. The thread 1 is pulled out of the spinning station 2 by means of delivery rollers 7 and wound up by the spool 3.

Outside the yarn path of the thread 1, a pivotally mounted holder 10 is arranged. On the holder 10 there is an eyelet 11 and a seal 12. The eyelet 11 is used in a later method step to form a thread loop. In normal spinning or delivery operation, the eyelet 11 is out of action. A suction 8 can be switched on, but is usually switched off for reasons of energy saving.

In FIG. 1b the position of the holder 10 is shown at yarn breakage. A yarn end is located on the surface of the spool 3. In the suction nozzle 6, negative pressure is applied by means of the suction 8 to find the yarn end on the spool 3. In the suction nozzle 6, the eyelet 11 is pivoted by means of the holder 10. The opening 5 is sealed by means of the seal 12. The suction nozzle 6 thus forms a closed suction channel.

Figure 1c shows the finding of a thread end 13 of the thread 1. The thread 1 is threaded through the eyelet 11 therethrough. The coil 3 rotates counter to the winding direction FIG. 1a , Thus, the yarn 1 is unwound from the bobbin 3 and passed into the suction 8 located downstream of the suction nozzle 6.

According to Figure 1d the holder 10 moves together with the eyelet 11 out of the suction nozzle 6 again. The thread 1 forms a loop 14 between the coil 3 and the suction 8. The thread 1 is pulled over edges 15 of the opening 5. It thus already forms a first defined shape of the loop 14. The thread end 13 is further attracted by the suction 8. The thread 1 is thus taut between the coil 3, the eyelet 11 and the suction 8.

By a further movement of the holder 10 in the direction of the spinning station 2, the loop 14 is corresponding Figure 1e pulled long. In order to prevent that the thread piece extending to the spool 3 and the thread piece running into the suction 8 contact each other, a spacer 16 is provided. The spacer 16 divides the two pieces of thread and keeps them spaced from each other. In addition, the spacer 16 causes the thread 1 not to come into contact with components of the machine and any further treatment of the thread would be disturbed thereby.

In FIG. 1f the separation of the thread 1 is shown. A separating device 17, for example a knife or a pair of scissors, cuts the thread 1. The thread end 13 is then sucked into the suction 8 and disposed of. The newly created thread end 13 'now has a defined length and can for example be fed to a yarn preparation device, not shown, to have an optimal structure of the thread end 13' for reconnecting to a new thread. The thread preparation can be done at this time or later.

According to Figure 1g the thread end 13 'is then introduced into the spinning station 2 and used to re-start the thread. This happens, for example, by the fact that negative pressure predominates in the spinning station and this sucks in the thread end 13 'falling out of the eyelet 11. The thread end 13 is finally sucked off. The holder 10 can then be pivoted back into the original position according to FIG. 1a ,

The supplied to the coil 3 thread 1 is held by means of the spacer 16 in a predetermined position and is fed through the opening 5 of the coil 3 again. The removal of the thread 1 from the spinning station 2 again takes place by means of the delivery rollers 7, between which the thread 1 is now clamped again. The clamping of the thread 1 between the feed rollers 7 can at this point or at the time of FIGS. 1e or 1f respectively.

In FIG. 2 the eyelet 11 is shown in more detail with the seal 12. The eyelet 11 extends along the seal 12. In the pivoted state, the eyelet 11 is completely within the suction nozzle 6 according to FIGS. 1b and 1c , The thread, which can come to lie in the axial direction of the coil 3 at any point is sucked through the elongated eyelet 11. When pivoting the eyelet 11 by means of the holder 10 ( FIGS. 1c . 1d and 1e ), the yarn 1 is first moved along oblique guides 20 in the direction of a groove 21. The thread 1 is caught in the groove 21. Thereafter, by the pivoting movement of the eyelet 11 of the thread 1 is formed into a loop 14, wherein the one part of the thread 1 in the groove 21 and the other part of the thread comes to lie in a groove 22 outside the eyelet 11. In the inner groove 21 is thus the guide for the bad thread, ie for the thread end 13, which is sucked later in the suction 8. In the outer groove 22 is the Gutfaden, ie the thread end 13 ', which is used for restarting and is wound on the spool 3 later. To the gut thread, which is wound on the spool 3 to be able to catch safely in the groove 22, a guide 23 is provided, which guides the thread coming from the groove 21 into the groove 22.

In FIG. 3 a spacer 16 is shown. The spacer 16 has a groove 24 for guiding the bad thread, which is to be discharged into the suction 8, on. To guide the other side of the thread loop 14, a guide 25 is provided on the spacer 16. About this guide 25 on the one hand, the separation between Gutfaden and Bad thread causes and on the other hand, the guide 25 serves as a sliding surface for the Gutfaden to arrive at the latest after re-setting in the normal yarn path. Such, in the form adapted to the requirements of the application site spacers 16 may be arranged several times in the yarn path and cause as needed at various points that the loop 14 remains tensioned.

In FIG. 4a another embodiment of the present invention is shown. Comparable components are provided with the same reference numerals as in the FIGS. 1a to 1g , In this exemplary embodiment, a multi-valve 30 is arranged in the region of the suction nozzle 6. The thread 1 passes through a slot 31 of the multi-valve 30 in the suction nozzle 6 and is wound from there via the winding roller 4 on the spool 3. The holder 10 with the eyelet 11 is pivoted out of the yarn path. The eyelet 11 is designed differently in this embodiment, as in the previous embodiment. In cross-section transverse to the thread running direction, it is annular and wedge-shaped in side view.

There is a gap between the suction 8 and the suction tube 6, in which later the eyelet 11 is inserted. The multi-valve 30 comprises two nested, rotatable and slotted tubes 32 and 33. The inner tube 33 is merely a tube section as in FIG FIG. 5 is explained in more detail. The slot thus extends over a large part of the Circumference of the tube 33. The outer tube 32 of the multi-valve 30 has a suction port 34, which leads to the suction 8. In the FIG. 4a is the position of the tube 33 such that the suction port 34 is blocked. The suction 8 is thus inactive.

In FIG. 4b the situation is shown at thread break. The thread is wound on the spool 3. The holder 10 is pivoted upwardly and closes with the annular seal 12, the gap between the suction nozzle 6 and the multi-valve 30. The suction 8 is further closed by the pipe section 33. The eyelet 11 is located adjacent to the suction nozzle 6 and the multi-valve 30th

To find the thread end 13 on the spool 3, the coil 3 rotates according to Figure 4c contrary to the normal delivery direction. The inner tube 33 is now rotated so that the slot 31 is closed and the suction port 34 is opened. The suction 8 is thereby active and the yarn end 13 is sucked through the multi-valve 30 through the suction 8.

After the thread end 13 has been found, the holder 10 moves down again, thus opening the gap between the suction nozzle 6 and the multi-valve 30. In addition, the inner tube 33 is rotated again, so that the slot 31 is open, but the suction port 34 still open and the suction 8 remains active. A loop of thread 14 forms, which runs through the slot 31 of the multi-valve 30 and thus already has a certain positioning. The thread loop 14 is stretched by the suction 8, which tries to suck the thread end 13. The coil 3 can still move counter to the normal delivery direction and thus track 1 thread. But it is also possible that in the formation of the loop 14 thread 1 is withdrawn from the suction 8.

In Figure 4e is the holder 10 with the eyelet 11 in the vicinity of the spinning station 2. The thread loop 14 is pulled long and now runs completely through the slot 31. Spacer 16, as shown in FIG FIG. 3 can also be arranged here to keep the thread loop 14 open. They are not shown here.

In FIG. 4f the thread loop 14 is severed by means of the separating device 17. The thread end 13 is sucked into the suction 8. The new thread end 13 'is available for a thread preparation.

In Figure 4g the thread end 13 'is sucked into the spinning station 2 and the production of the thread 1 can start again. The holder 10 can finally be pivoted back into the original position according to FIG. 4a , The inner tube 33 can then again close the suction port 34, so that energy is saved, since at this moment the suction 8 is not needed.

FIG. 5a shows a section through the multi-valve 30. It can be seen that the multi-valve 30 has an outer tube 32 and an inner tube 33. The inner tube 33 is merely a tube section which is rotatably mounted with respect to the tube 32. On the outer tube 32 of the suction port 34 is arranged, which leads into the suction 8. In addition, a further suction port 36 is provided in the outer tube 32. The suction connection 36 can serve to receive a thread loop during spinning in order to be able to carry out any necessary length compensation. In this case, a thread loop is pulled more or less far into the suction port 36 and pulled out as needed from this again.

The inner tube 33 is in FIG. 5a shown in a position in which both suction ports 34 and 36 are closed. Only the slot 31 of the tube 32 is open. Through this slot 31, the thread runs in the normal Delivery from the spinning station 2 to the spool 3. This position corresponds FIGS. 4a and 4b ,

In FIG. 5b the tube 33 is twisted compared to FIG. 5a , In this position, the suction port 34 is opened while suction port 36 and slot 31 are closed. This position is taken for the search of the thread end on the spool 3 and the suction of the thread end 13 in the suction 8 (see Figure 4c ).

In FIG. 5c the tube 33 is again slightly twisted. This position closes the suction port 36, but opens the suction port 34 and the slot 31. In this position of the tube 33, the loop 14 is formed ( FIGS. 4d to 4g ).

FIG. 5d shows a sealed suction port 34. Slot 31 and suction port 36 are open. In this position, a thread loop can be formed in the suction port 36, which can be used for length compensation during winding onto the bobbin 3 of the thread 1.

In FIG. 6 the movement of the eyelet 11 along a guide 40 is shown. A circular pivoting movement of the eyelet 11 is thus not required, which space can be saved. The movement of the eyelet 11 can thus be performed almost arbitrarily according to the available space at the workplace. Some of the individual positions of the eyelet 11 are shown hatched by the reference numerals 11 ', 11 "and 11''' The holder 10 is here integrated with the seal 12. However, this only represents a schematic representation of the embodiment 11 together with the holder 10 and the seal 12 may, for example, be effected by means of a Bowden cable, not shown, which pushes or pulls the eyelet 1, the holder 10 and the seal 12 along the guide 40. The eyelet may also connect a blind which For example, this is designed as a bellows or as a kind of articulated chain be moved together with the eyelet 11 and cover the work area when the eyelet 11 is in the region of the suction nozzle 6. In the end position, the blind can then release the work area again. In the position of the eyelet 11 "is such a blind in almost folded state indicated.

The present invention is not limited to the illustrated and described embodiments. Variations within the scope of the claims are also possible as a combination of features, even if they are shown and described in different embodiments.

Bezuaszeichenliste

1

thread

2

spinning unit

3

Kitchen sink

4

winding roller

5

opening

6

suction nozzle

7

delivery rollers

8th

suction

10

holder

11

eyelet

12

seal

13

thread end

14

loop

15

edge

16

spacer

17

separator

20

guide

21

groove

22

groove

23

guide

24

groove

25

guide

30

Multiventil

31

slot

32

outer tube

33

inner tube

34

suction

36

suction

40

guide

41

louvre

Claims (18)

1. Method for extracting a thread (1) by suction from a bobbin (3) and for the re-attachment of a thread end (13) to a new thread, whereas the thread (1) is sucked in against its spooling direction through a suction nozzle (6) into a suction system, a loop (14) is subsequently formed, the thread (1) is separated in the area of the loop (14), one thread end (13) is discharged into the suction port (8) and the other thread end (13') coming from the bobbin (3) is prepared for re-attachment, and is subsequently attached to a new thread, characterized in that , upon being extracted by suction, the thread (1) is guided through an eyelet (11) located in the run of the thread of the suction port (8) in the suction nozzle (6), and the eyelet (11) is, together with the thread (1), moved out of the run of the thread of the suction port (8) out of the suction nozzle (6), such that the thread (1) forms a loop (14) between the bobbin (3), the eyelet (11) and the suction port (8).
2. Method according to the preceding claim, characterized in that the movement of the eyelet (11) is produced through a swiveling movement and/or a displacement along a guide.
3. Method according to one or more of the preceding claims, characterized in that , during the extracting of the thread (1) by suction, the eyelet (11) seals the suction nozzle (6) at least temporarily.
4. Method according to one or more of the preceding claims, characterized in that , in the forming of the loop (14), the thread (1) is pulled over at least one edge (15), preferably two edges (15).
5. Method according to one or more of the preceding claims, characterized in that , during the extracting of the thread (1) by suction through the eyelet (11), the eyelet (11) is located on one side of the at least one edge (15) and, during the forming of the loop (14), it is located on the other side of the at least one edge (15).
6. Method according to one or more of the preceding claims, characterized in that the thread (1) is guided by means of the eyelet (11) into at least one predetermined position transverse to the movement of the eyelet (11) and preferably upon the extracting of the thread (1) by suction, the eyelet (11) guides the thread (1) into a first position, and, upon forming the loop (14), in particular upon the swiveling and/or displacement of the eyelet (11), guides it into a second position.
7. Method according to one or more of the preceding claims, characterized in that the thread (1) is guided adjacent to the eyelet (11) through a multi-valve (30) for optionally forming a loop (14) upon the extracting of the thread (1) by suction or upon the re-attachment of the thread (1).
8. Method according to one or more of the preceding claims, characterized in that , upon extraction by suction from the bobbin (3) and upon delivery to the bobbin (3), the thread (1) is guided by the suction nozzle (6) which, in particular, is fixed.
9. Device for extracting a thread (1) by suction from a bobbin (3) and for re-attaching a thread end (13') to a new thread, with a suction nozzle (6) for picking up a thread (1) from the bobbin (3), an extraction system for extracting by suction the thread (1) counter to its spooling direction into the extraction system, a device for forming a loop (14), a thread separating device (17) for separating the thread (1) in the area of the loop (14) and a thread preparation device for preparing the thread (1) for re-attachment, characterized in that , the device features an an eyelet (11) arranged in the run of the thread of the extraction port (8) in the suction nozzle (6), in order to be able to guide the thread (1) through it upon the extraction by suction, and the eyelet (11) is arranged on a movable holder (10), in order to be able to move the eyelet (11), together with the thread (1), out of the run of the thread of the extraction port (8) out of the suction nozzle (6), such that the thread (1) forms a loop (14) between the bobbin (3), the eyelet (11) and the extraction port (8).
10. Device according to the preceding claim, characterized in that the holder (10) with the eyelet (11) is mounted in a manner that it is able to be swiveled or displaced.
11. Device according to one or more of the preceding claims, characterized in that the holder (10) is movable in an articulated manner and guided in a connecting link.
12. Device according to one or more of the preceding claims, characterized in that the eyelet (11) is arranged in the area of the suction nozzle (6) and, during the extracting of the thread (1) by suction, seals the suction nozzle (6) at least temporarily.
13. Device according to one or more of the preceding claims, characterized in that , adjacent to the eyelet (11), at least one edge (15), preferably two edges (15) is / are arranged.
14. Device according to one or more of the preceding claims, characterized in that , during the extracting of the thread (1) by suction through the eyelet (11), the eyelet (11) is located on one side of the at least one edge (15) and, during the forming of the loop (14), it is located on the other side of the at least one edge (15).
15. Device according to one or more of the preceding claims, characterized in that the eyelet (11) features guides (20, 23), in order to be able to guide the thread (1) into at least one predetermined position transverse to the movement of the eyelet (11) and preferably one of the guides (20) is arranged on the inner side of the eyelet (11) and the other guide (23) is arranged on the outer side of the eyelet (11).
16. Device according to one or more of the preceding claims, characterized in that a multi-valve (30) subjected to suction is arranged adjacent to the eyelet (11) for, optionally, forming a loop (14) upon extraction by suction or upon re-attachment of the thread (1).
17. Device according to one or more of the preceding claims, characterized in that the multi-valve (30) comprises two tubes (32, 33) that are fitted into one another, are rotatable and feature slots (31) and the outer tube (32) features one, preferably two, suction ports (34, 36).
18. Device according to one or more of the preceding claims, characterized in that one suction port (34) picks up the thread (1) from the bobbin (3) upon the extraction by suction, and, if applicable, the second suction port (36) picks up the thread (1) upon the delivery to the bobbin (3).

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