EP0994821B1 - Winding machine - Google Patents

Abstract

The invention relates to a winding machine to wind a continuously fed thread on a spool; wherein the thread is guided into a cross-winding device consisting of a pre-cross-winding unit and a grooved roller located downstream from the path of the thread. The winding machine has a thread deflection device in order to change the thread from a full spool clamped on a spool spindle to an empty spool clamped on another spool spindle by rotating a winding turret. The thread deflection device consists of a guide plate which is guided parallel to the periphery of the grooved roller and a thread guide which can be positioned parallel to the axis of the spool spindle. By pivoting the guide plate, the thread can be thus guided from the cross-winding device without substantially changing the winding.

Description

The invention relates to a winding machine for winding a continuously running thread to a bobbin according to the preamble of Claim 1.

Such a winding machine is known from DE 23 64 284 (= US-PS 3,999,715). Here, a continuously tapering thread a coil wound. After the bobbin is finished winding automatically a change from the full spool to an empty tube, the Thread is guided by means of a thread folding device such that it is the empty sleeve is taken over. The full coil and the Empty tube each clamped on a winding spindle, which can be rotated cantilevered are stored on a turret. The thread is passed through Rotation of the winding turret moves the full bobbin from the winding area into one Changing area and the empty tube from the changing area into the winding area pivoted. To transfer the thread, the thread must be by means of the thread transfer device can be lifted out of the traversing device. The The traversing device consists of a pre-traversing unit and a Grooved roll. The grooved roller is immediately in front of the coil to be wound arranged and is partially wrapped by the thread, the thread to Placing on the bobbin is guided in a thread guide groove.

The known thread folding device therefore guides the thread by means of a Thread guide in a spacious loop outside the traversing device. Such large deflections result in correspondingly high thread tensions produced in the thread. These thread tensions can already Tear the thread before the thread catches on the empty tube has been.

Accordingly, it is an object of the invention, a winding machine of the beginning mentioned type in such a way that thread transfer is as gentle as possible from the full spool to the empty tube, so that during the Transfer occurs as little fluctuation in the thread tension occurs.

This object is achieved by a winding machine with the Features of the characterizing part of claim 1 and by a method solved with the features of claim 11.

The winding machine according to the invention is characterized in that the The thread is the degree of wrap of the thread that the Approximately takes up thread during the traversing on the grooving roller is maintained. So that are generated in the thread by friction Thread pulling forces when threading the thread from the full spool to the empty tube insignificantly changed compared to the thread tension during the Winding cycle. For this purpose, the thread deflection device of the winding machine has Guide plate guided parallel to the circumference of the grooved roller and one axially parallel thread guides that can be positioned on the winding spindles. Through the Movement of the guide plate from a rest position to an operating position the leading edge of the guide plate facing the thread Take thread and from the intervention of pre-switching as well as the Raise grooved roller. By means of the thread guide, the thread can now be in a Lead catch position in which the thread in a catch slot of the empty tube is caught.

The thread transfer device of the winding machine according to the invention is advantageous when first threading the thread on an empty tube and when folding of the thread from a full bobbin to an empty tube applicable.

The development of the winding machine according to claim 2 has the advantage that the loop of the thread on the grooved roller and the loop of the thread on the guide plate are essentially the same. Serves at the same time the guide plate to cover the grooved roller. Here, the guide plate be designed such that the area of the grooved roller that is not is contacted by the thread in the rest position of the guide plate is completely covered. So that are generated by the grooved roller Air turbulence is reduced, so that the thread during traversing can be safely guided in the thread guide groove of the grooved roller.

Due to the design of the winding machine according to claim 3 is a Particularly gentle transfer of the thread from the traversing device reached. Here, the direction of movement of the guide plate with the Thread running direction identical. In this arrangement, the movement of the Guide the thread first led out of the pre-traversing unit, which is particularly advantageous for a grooved roller that only in the end areas of the traverse stroke has a thread guide groove.

In the case of a grooved roller that has thread guide grooves over the entire traversing stroke on the circumference contains, is the design of the winding machine after Claim 4 can preferably be used. With this arrangement, the Removal of the thread from the engagement of the grooved roller, the thread Traversing movement of the pre-traversing unit by sliding along the Leading edge of the guide plate can follow without impairment.

The particularly advantageous development of the winding machine according to claim 5 is particularly useful when turning the thread from a full spool to one Empty sleeve suitable. Here, the full bobbin is in moved an outer position on the turret so that the empty tube and the Full bobbin are positioned offset to each other in the thread running direction. Thereby it is avoided that while the thread is being guided in the catching position, it does not run off the full spool. Until the thread is caught in one Catch slot of the empty tube, the thread is wound on the full spool. In addition, this version of the winding machine has a very high Docking security. The thread can run in a parallel direction Catch slot are guided in the empty sleeve. So the entire length stands of the catch slot for catching the thread.

Here, the configuration of the winding machine according to claim 6 is preferred apply to the thread already led out of the traversing without Formation of a binding bead to be able to deposit on the full spool. First when the full spool is moved to its outer position, a binding bead becomes wound on the full spool. Another advantage of this design is that no other drive means to move the Winding spindle is required.

However, in order to prevent the thread from falling off the full bobbin, it is also possible that in the area between the empty tube and the full coil a guide plate with a guide groove swings in during folding, so that the thread is guided in the guide groove on a fixed Position runs on the full spool and thus forms a binding bead. After the thread between the empty tube and the full spool of the Guide groove is detected, the positionable thread guide moves into the Catch position so that the thread in the area of the catch slot on the Empty sleeve passes through and can be taken over by the empty sleeve.

Another particularly preferred embodiment variant of the winding machine provides that the winding turret with the opposite direction of rotation to the Direction of rotation of the winding spindle is drivable. This ensures that during catching the empty tube opposite to the thread running direction emotional. The relative movement between the empty tube and the thread leads to ensure that the empty tube very quickly the required when catching Clamping forces lead to the build-up of a thread tension, which breaks the Thread in the section between the empty tube and the full bobbin causes. On the other hand, this arrangement can be used for catching the thread required wrap around the empty tube can be kept very low, so that when the empty tube is swiveled into the thread run, no sudden Tension changes occur in the thread.

Due to the advantageous development of the winding machine according to claim 8 can wrap the thread on the empty tube in the winding area be minimized. Only after the thread has been brought into the catching position the feed plate is in the thread path between the empty tube and the Full bobbin pivoted so that the leading edge deflects the thread. In order to the loop around the thread required for catching Empty sleeve set.

The configuration of the winding machine according to claim is particularly advantageous 10 to avoid that the loose thread end of the full bobbin in the Area of the coil to be newly formed. Here is the pan direction of the contact plate and the rotating movement of the full spool in the changing area rectified. This prevents the loose thread end against the Leading edge of the contact sheet strikes.

Further advantages of the winding machine according to the invention are based on the in the exemplary embodiments illustrated are explained.

Fig. 1

schematisch die Seitenansicht einer erfindungsgemäßen Aufspulmaschine im Betrieb;

Fig. 2

die Seitenansicht der Aufspulmaschine nach Fig. 1 beim Umlegen des Fadens;

Fig. 3

schematisch die Frontansicht der Aufspulmaschine aus Fig. 1 beim Umlegen des Fadens;

Fig. 4

schematisch die Seitenansicht eines weiteren Ausführungsbeispieles der Aufspulmaschine.

They represent:

Fig. 1

schematically the side view of a winding machine according to the invention in operation;

Fig. 2

the side view of the winding machine of Figure 1 when turning the thread.

Fig. 3

schematically the front view of the winding machine of Figure 1 when turning the thread.

Fig. 4

schematically the side view of another embodiment of the winding machine.

In all embodiments of the winding machine shown, the Thread 1 without interruption at a constant winding machine speed supplied. The thread 1 is first of all guided by the head thread guide 2 led, which forms the tip of the traversing triangle. Then the Thread to the traversing device 3. The traversing device 3 consists of a pre-traversing unit 4 and a grooved roller connected downstream in the thread run 8. Such a traversing device is used, for example, in the US 3,797,767. The pre-traversing unit 4 is preferably made of one Reverse thread shaft 5 and a traversing thread guide guided in a straight guide 6 7 formed. Here, the traversing thread guide 7 in a groove the reverse thread shaft 5 and driven by the reverse thread shaft 5 driven to a reciprocating movement. The grooved roller 8 has thread guide grooves 9 on the circumference. Since the reverse thread shaft 5 and the grooved roller 8 driven at synchronous peripheral speed are used, the traversing thread guide 6 for guiding the thread in the Thread guide groove 9. The reverse thread shaft 5 is so on the grooved roller 8 matched that the traversing thread guide 7 with sufficient thread Advance leads safely into the thread guide groove 9. The thread guide groove 9 takes over the actual laying of the thread 1 on a bobbin 15. The thread 1 on the circumference of the grooved roller 8 is deflected by approximately 90 ° and then runs onto the coil 15. To fix the deposited thread a pressure roller 10 is arranged axially parallel to the grooved roller 8 and lies with a predetermined contact force on the coil surface of the coil 15 on.

The traversing device 3 and the pressure roller 10 are adjustable in height Carriage 12 arranged. The carriage 12 is replaced by a pneumatic relief device (not shown) in a guide 13 in vertically back and forth. The pneumatic relief device is pressurized with compressed air in such a way that it weighs the slide Compensate in whole or in part and, if necessary, additional investment power generated between the pressure roller 10 and the adjacent coil. A such relief device can also be via a programmable control device are controlled such that a predetermined for the winding trip Course of the contact force between the pressure roller 10 and the coil 15 acts.

The coil 15 is formed on the sleeve 16. The sleeve 16 is on the rotatably mounted winding spindle 17. The coil 15 is by the with a spindle drive 36 (Fig. 3) connected winding spindle 17 driven. However, the coil 15 can also on its circumference by the pressure roller 10 are driven.

In Fig. 1 is the winding spindle 17 with the clamped thereon Sleeve 16 and the coil 15 formed thereon in the winding area. To this There is a second winding spindle 18 with one clamped thereon Empty sleeve 19 in an exchange area. Both winding spindles 17 and 18 are cantilevered in a rotatable turret 20 freely rotatable. The Winding turret 20 is rotatable in the machine base 21 of the winding machine stored and is pivotable by the turret drive 40 (Fig. 3), so that the winding spindles 17 and 18 alternately in the winding area or Exchange range can be pivoted when the coil 15 on the one of the spindles is fully wound. The turret 20 is for this purpose connected to the turret drive 40 (FIG. 3).

To increase the coil diameter of the coil 15 during the To enable winding travel in the winding area, the pressure roller 10 and the traversing device 3 by means of the carriage 12 in a vertical direction Direction moved away. This movement is done by the relief facility (not shown here) controlled.

To put the thread on an empty tube or to fold the thread the winding machine has one from a full spool to an empty tube Thread deflection device. The thread deflection device consists of a Guide plate 24, which is movably arranged on the circumference of the grooved roller 8 is. Furthermore, the thread deflection device has one in the thread run the traversing device 3 arranged thread guide 11, which by means of a Positioning device 42 can be positioned axially parallel to the winding spindles 17 and 18 is. In Fig. 1 the winding machine is shown in the operating position. The guide plate 24 is in a rest position. In this The position of the area of the pressure roller that is not contacted by the thread becomes 8 completely or partially covered by the guide plate 24. Likewise located the thread guide 11 lies in an outside of the traversing triangle Rest position.

When first loading the winding spindle 17 with the sleeve 16 through Rotation of the winding turret 20 into the position shown in the winding area - as shown in Fig. 1 - pivoted. Then the carriage 12 follows below to bring the pressure roller 10 into contact with the sleeve 16. The sleeve 16 is driven by the winding spindle 17 so that the Pressure roller 10 the same peripheral speed in contact with the sleeve 16 accepts. Then the guide plate 24 in the counterclockwise direction of movement marked with the arrow in the thread path between the pre-traversing unit 4 and the grooved roller 8 pivoted. The thread is from the leading edge 25 of the guide plate 24 detects and from the traversing thread guide 7 and from the thread guide groove 9 of the grooved roller. The thread comes out of the Traversing device. He is using a feed gun around the guide plate 24 placed and guided between the empty sleeve 16 and the empty sleeve 19. The Thread will take its natural direction, so that it is located in the central region of the sleeve 16. Here is the direction of movement of the thread 1 of the direction of movement indicated by the arrow Empty sleeve 16 directed in the opposite direction. Now the thread guide 11 is by means of the positioning device 42 is pivoted from the rest position into a catching position. The thread guide 11 picks up the thread 1 and guides it along the leading edge 25 in the catching position. The snap position is outside the traversing area. Here the thread guide 11 lies with a in the sleeve 16 introduced slot in a normal plane. Well now by guiding the application pistol through the operator of the thread 1 on the empty tube 16 can be increased such that the thread in the catch slot of the empty sleeve 16 is caught.

However, it is also possible to thread the thread 1 in a specific manner to specify the sleeve 16. This is done by a side of the machine frame arranged contact plate 26. The contact plate 26 is at the end of a Swivel arm 27 attached. The swivel arm 27 is with his other End pivotally arranged on one in the machine upper frame 22 Pivot axis 28 mounted. The swivel arm 27 is by a drive (here not shown) pivotable such that the feed plate 26 in the area of Revolving turret 20 can occur. Then the contact plate 26 is between the sleeve 16 and the empty sleeve 19 pivoted. A leading edge 29 of the The contact sheet 26 deflects the thread 1 in such a way that the thread 1 Loops around sleeve 16. When the contact plate 26 is in the operating position is and the thread guide 11 is moved to the catching position, the Thread caught in the catch slot of the sleeve 16.

After the thread is caught in the catch slot of the sleeve 16, the Thread guide 11 guided such that a thread reserve on the sleeve 16th can be wrapped. After the thread reserve is set, the Thread guide 11 back to its starting position. At the same time it will Guide plate 24 pivoted into its rest position, so that the thread in the traversing device occurs and the traversing thread guide 7 and Thread guide groove 9 is adopted. The sheet 26 is also pivoted into its rest position. The winding trip to form the coil 15 starts.

During the winding cycle, the speed of the winding spindle 17 is by means of a Control device controlled so that the peripheral speed of the coil 15 remains constant. For this purpose, the speed of the pressure roller 10 is detected and abandoned a control device. As soon as the speed of the pressure roller 10 changed, the spindle drive via the control device 36 of the spindle 17 adjusted so that the peripheral speed of the pressure roller adjusts itself to its setpoint.

When putting on the thread, it is also possible that the thread guide 11 the Passes thread at the end of the traversing stroke of a thread reserve device. The thread reserve device then guides the thread while catching and during the formation of the thread reserve. Then the thread reserve device free the thread.

In Fig. 2 is the situation when threading from the full bobbin to one Empty sleeve shown. After the coil 15 is fully wound, the carriage moves 12 in its uppermost position. The winding turret 20 is against the Swiveled clockwise in direction of rotation 23. After the full coil 15 has left the area of the grooved roller 8, the carriage 12 is lowered. Now the guide plate 24 is from its rest position to the operating position pivoted. For this purpose, the guide plate 24 with a rocker 43 (Fig. 3) connected, which is pivotally arranged on the carriage 12. Then the leading edge 25 of the guide plate 24 guides the thread 1 from the Traversing thread guide 7 of the pre-traversing unit 4 and out of the thread guide groove 9 of the grooved roller 8. The thread 1 takes its natural thread running direction a, which is approximately in the middle of the coil 15. So first a first binding bead wrapped.

When pivoting the turret 20, the winding spindle 17 with the Full coil in the axial direction from an inner position to an outer one Position on the winding turret 20 shifted - as later to Fig. 3 in more detail described. The outer position is reached when the winding spindle 17 has reached the change range with the full coil 15, as shown in FIG. 2. The winding spindle 18 with the empty tube 19 and the winding spindle 17 of the Full spool 15 are arranged offset on the turret 20.

In Fig. 3 the situation of Fig. 2 is shown in the front view. In the in Fig. 3 shown embodiment of the winding machine are exemplary several winding stations - four winding stations are shown - arranged. each the winding points is constructed the same, so that the description based on a Winding station - as before - is continued.

The winding spindles 17 and 18 are slidable with the spindle bearings 31 and 32 stored in the turret 20. The winding turret 20 is with bearing 38 in the machine frame 21 stored. On the opposite of the winding points Side of the turret 20 is the winding spindle 17 with the spindle drive 36 and the winding spindle 18 connected to the spindle drive 37. In the area at the drive 36 and the bearing 31 is on the winding spindle 17 a cam 33 arranged. The cam 33 engages in a groove 34 in the machine frame. The groove 34 is circumferential in the machine frame arranged, the groove course preferably partially to the vertical is inclined. Thus, the winding spindle 17 with the cam 33 is opposite the winding spindle 18, which also has a cam 35 in the groove 34 is guided axially from an inner to an outer position on the winding turret emotional.

The following description of how to turn the thread applies to both Fig. 2 as well as for Fig. 3. After the winding spindle 17 with the full bobbin 15 has reached the position in the changing area, the thread guide 11 by a positioning device 41 from its rest position into a catching position method. Here, the thread is gripped by the thread guide 11 and slides along the leading edge 25 of the guide plate 24. In this Position, another binding bead is wound on the full spool 15. The Empty tube 19 on the winding spindle 18 is only slightly removed from the thread 1 entwined. Catching is not possible in this situation. Only after the contact plate 26 is pivoted from its rest position into the operating position was, as shown in dashed lines in Fig. 2, the loop of the thread 1 on the sleeve 19 so increased that the thread 1 in the Catch slot 41 of the empty sleeve 19 is immersed and caught. The jetty 26 is not shown in FIG. 3 due to the clarity. The Thread then breaks in the section between the full spool 15 and the empty tube 19. The feed plate 26 is now designed such that the entire Length of the full coil 15 is covered. So that the loose thread end of the Full coil 15 does not get into the area of the empty tube 19.

After the thread 1 is caught on the empty tube 19, the thread guide 11 positioned such that a thread reserve can be deposited on the sleeve is. If the thread reserve is wound, the guide plate 24 and move Thread guide 11 back to its starting position. This turns the thread 1 released and gets back into the areas of the thread guide groove 9 Grooved roller 8 and the traversing thread guide 7 of the pre-curling 4. The new Spool trip begins.

The winding spindle 17 with the full spool 15 is braked so that the Full coil 15 is ready for removal. After the full coil 15 of the spindle 17 is cleared, the contact plate 26 pivots into its starting position back. One or more will be on the winding spindle 17 new empty sleeve / s plugged on.

When threading it is also possible to thread the thread using the thread guide 11 and a thread reserve device arranged outside the traverse stroke respectively. Here, the thread is guided by the thread guide 11 only for transfer to the thread reserve device from the traverse stroke area method. Positioning for catching and forming the thread reserve is taken over by the thread reserve device.

In the catch position, the thread runs parallel through the catch slot 41 Empty tube 19. The parallel thread course and the opposite directions of movement of the thread 1 and the empty tube 19 lead to a very high catch safety.

4 is a further embodiment of the winding machine according to the invention shown in side view. The structure here is essentially identical to the construction of the winding machine in Fig. 1. Opposite The winding machine in FIG. 1 is in the winding machine shown in FIG. 4 the guide plate 24 arranged such that the direction of movement for swiveling into an operating position clockwise.

The winding spindles 17 and 18 cannot be moved on the winding turret 20 stored. The direction of rotation of the turret is also the same as the direction of rotation the winding spindles rectified. Therefore, when threading the Full spool 15 on the empty tube 19, the winding spindle 18 with the empty tube 19th pivoted into the thread run such that the direction of rotation of the sleeve 19th and the running direction of the thread 1 are the same. With this arrangement points the empty tube 19 in the winding area already for catching the thread required wrap on.

When threading is first the carriage 12 in an uppermost position move so that the winding turret turns the full bobbin 15 clockwise can move the winding area into the changing area. after the Full coil 15 is positioned in the changing area, the guide plate 24th move into its operating position so that the leading edge 25 of the guide plate 24 the thread from the thread guide groove 9 and the traversing thread guide 7 lifts. The thread then runs in its natural course again in the middle of the full coil 15. Now the feed plate 26 by means of the swivel arm 27 between the empty sleeve 19 and the full spool 15 pivoted. The contact plate 26 has one facing the thread Guide groove 30 in which the thread is caught. In this position a binding bead is formed on the full spool 15. Now the moves Thread guide 11 from its rest position into the catch position. The Move thread 1 from the area of the traverse stroke until the Thread 1 passes through a catch slot in the empty tube 19. After the Thread 1 was caught by the empty tube 19, the thread reserve educated. Then the winding trip begins. In this embodiment, too The thread is fed out of the traversing device in such a way that without significantly changing its wrap in the area of the grooved roller.

LIST OF REFERENCE NUMBERS

1

thread

2

Yarn guide

3

Traversing device

4

Vorchangiereinheit

5

Spiraled roll

6

straight guide

7

Traversing thread guide

8th

grooved roll

9

yarn guide grooves

10

pressure roller

11

Thread guide, position device

12

carriage

13

guide

15

Coil, full coil

16

shell

17

winding spindle

18

winding spindle

19

empty tube

20

spindle turret

21

Machine base

22

Upper machine frame

23

direction of rotation

24

guide plate

25

leading edge

26

threading plate

27

swivel arm

28

swivel axis

29

leading edge

30

guide

31

spindle bearings

32

spindle bearings

33

cam

34

cam track

35

cam

36

spindle drive

37

spindle drive

38

camp

40

revolver drive

41

catching slit

42

positioning

43

wing

Claims (11)

1. Take-up machine for winding a continuously advancing yarn (1) to a package (15), with a yarn traversing mechanism (3) and a contact roll (10) downstream thereof, the yarn traversing mechanism comprising a pre-traversing unit (4) and a grooved roll (8) arranged axis parallel to the contact roll (10); with a vertically adjustable carriage (12) accommodating the contact roll (10) and the yarn traversing mechanism (3); and with two rotatable winding spindles (17, 18) mounted eccentrically on a spindle turret (20), wherein for transferring the yarn from a full package (15) mounted on the winding spindle (17) to an empty tube (19) mounted on the other winding spindle (18), the winding spindle (17) with the full package (15) is rotated from a winding range to a doffing range, and the winding spindle (18) with the empty tube (19) from the doffing range to the winding range, and wherein the yarn (1) is guided for transferring the yarn from the full package (15) to an empty tube (19) by a yarn transfer device, characterized in that the yarn transfer device comprises a guide plate (24) extending parallel to the circumference of the grooved roll (8) and a yarn guide (11) that can be positioned axes parallel to the winding spindles (17, 18); that the guide plate (24) can be moved with a guide edge (25) facing the yarn (1) from an idle position to an operating position in which the yarn is guided outside of the yarn traversing mechanism (3); and that the yarn guide (11) can be positioned from an idle position to a catching position, in which the yarn (1) advances through a catching slot (41) arranged in the empty tube (19).
2. Take-up machine of claim 1, characterized in that the guide plate (24) has a shape congruent with the circumference of the grooved roll (8) and a length extending over the traverse stroke, and that the guide plate (24) is movably arranged at the circumference of the grooved roll (8).
3. Take-up machine of claim 1 or 2, characterized in that the guide plate (24) is arranged such that during the movement of the guide plate (24) from the idle position to the operating position, the guide edge (25) engages the yarn (1) between the pre-traversing unit (4) and the grooved roll (8).
4. Take-up machine of claim 1 or 2, characterized in that the guide plate (24) is arranged such that during the movement of the guide plate (24) from the idle position to the operating position, the guide edge (25) engages the yarn (1) between the grooved roll (8) and the contact roll (10).
5. Take-up machine of one of the foregoing claims, characterized in that the winding spindles (17, 18) are mounted for axial displacement in the spindle turret (20) the winding spindle in the doffing range being axially movable relative to the winding spindle in the winding range from an inner position to an outer position on the spindle turret.
6. Take-up machine of claim 5 characterized in that during the transition from the winding range to the doffing range, the winding spindle with the full package (15) is continuously movable from the inner position to the outer position on the spindle turret.
7. Take-up machine of one of claims 1 to 4, characterized in that a threadup plate (26) with a guide groove (30) is arranged laterally to the spindle turret (20) and that the threadup plate (26) with its guide group (30) can be pivoted from an idle position to an operating position extending through the path of the yarn between the empty tube (19) and the full package (15), the yarn (1) being guided in the guide groove (30).
8. Take-up machine of one of claims 1 to 7, characterized in that the spindle turret (20) can be driven oppositely to the direction of rotation of the winding spindles (17, 18).
9. Take-up machine of claim 8, characterized in that a threadup plate (26) having a substantially straight guide edge (29) is arranged laterally to the spindle turret (20) and that the threadup plate (26) with its guide edge (29) can be pivoted from an idle position to an operating position extending through the yarn path between the empty tube (19) and the full package (15).
10. Take-up machine according to claim 7 of 9, characterized in that the threadup plate (26) has a width covering the length of the full package (15), and that the pivotal movement of the threadup plate (26) and the rotation of the full package (15) are unidirectional in the doffing range.
11. Method for transferring a yarn from a full package to an empty package in a take-up machine with a yarn traversing mechanism, which comprises a pre-traversing unit and a grooved roll in the yarn path downstream thereof, and with two rotatable winding spindles mounted eccentrically on a spindle turret for receiving the full package and the empty tube, wherein during the winding the yarn lies against the circumference of the grooved roll and is partially guided in a groove of the grooved roll, before the yarn advances onto the full package; wherein by rotation of the turret, the full package is rotated from a winding range to a doffing range, and the empty tube is rotated from the doffing range to the winding range, the empty tube being brought into contact with the yarn advancing onto the full package, characterized in that after rotating the full package, the yarn is lifted out of the yarn traversing mechanism by a guide plate moving parallel to the circumference of the grooved roll; that the full package is shifted on the turret from an inner position to an outer position; and that a yarn guide that can be positioned axis parallel to the empty tube engages the yarn and brings to a catching position being in plane with the catching slot of the empty tube, the yarn sliding along a guide edge of the guide plate.

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