EP1660400B1 - Method and device for positioning several tubes in a winding machine - Google Patents

Abstract

Disclosed are a method and a device for positioning several tubes (8) in a winding machine (1). Tubes (8) used for winding up bobbins on winding machines (1) are provided with a take-up means (8.1), with the aid of which the thread is taken up on the tube (8) at the beginning of the winding process. Coaxially arranging several tubes (8) behind each other is problematic insofar as tolerances in the length of the tubes (8) result in a positioning error of the take-up means (8.1), thereby decreasing the take-up accuracy. In the inventive method and the inventive device, the tubes (8) are separated and moved to a setpoint position after being slid onto the clamping chuck (7). For this purpose, guiding means (11) act upon the tubes (8) which can be positioned on the clamping chuck (7) individually or several at a time.

Description

The invention relates to a method for positioning a plurality of sleeves in a winding machine according to the preamble of claim 1 and a device for carrying out the method according to the preamble of claim 5 and a winding machine according to the preamble of claim 19.

From the US 5,393,003 It is known to first postpone two sleeves on a chuck and then withdraw the rear sleeve of a doffer by a defined amount. Thus, the sleeves have a fixed distance to each other after separation.

Furthermore, from the EP 1 174 308 and the EP 0 427 994 A1 Devices are known in which also pods isolated from a doffer are pushed onto a chuck and positioned. In this case, the sleeves are first pushed by a doffer to its final position. Following this, the second sleeve is pulled back by the doffer, so that the side of the Chuck a stop between the first and the second sleeve can be moved out. Finally, the doffer then pushes the second sleeve against this stop. The doffing process is completed only after the sleeves have been separated. The gap created between the sleeves is required for catching elements which are provided on a chuck in the winder to be loaded.

From the EP 0 937 008 A1 is a winding machine for winding a plurality of continuously tapered threads known. For this purpose, the tapered threads are wound onto a respective rotating sleeve to form a coil. By a seen in the direction of yarn travel before the spool arranged traversing each thread is periodically changed in Spulenachsrichtung so that a cylindrical cheese is wound by the superposition of the movements.

The sleeves and thus the coils are coaxially mounted on cantilevered chucks. By rotation of the chuck, the sleeves are driven.

In order to replace the full bobbins as lossless as possible with empty tubes, the bobbin winder has two chucks, which are arranged on a turntable and thus can be reciprocally moved from a winding position to a parking position.

The sleeves have at a certain point on catch means with which the threads are caught when changing from the parking position to the winding position of the rotating sleeve and taken. As catching come ringnutförmige notches or provided in punched windows fishing hooks on the sleeve in question. For trapping, the threads are guided with thread guides exactly over this catch during the change process. A comparable one Situation also arises when first applying the threads, where also thread guides guide the threads exactly on this catch.

The change process described is classified as very critical especially at high yarn speeds. Situations in which one of the threads is not caught by the sleeve lead to interruptions in the winding process.

As an important parameter for the safety of catching the exact relative position of the catch has proved against the respective Fadenfübrern.

The in the EP 0 937 008 A1 shown winding machine winds four adjacent threads simultaneously with a chuck. However, it is also common winder with even more simultaneously windable threads and correspondingly longer chucks.

The chucks are fitted after changing and removing the coils with directly successively arranged sleeves. In this case, the first sleeve is pushed to a stop and the underlying sleeves each against the opposite sleeve. Then the sleeves are clamped on the chuck. With this method, the chuck of a winding machine can be equipped very easily and quickly manually.

It is also common to load the chuck with a complete stack of piles with an automatic or semi-automatic doffer. Such a doffer is for example in the published patent application DE 195 08740 A1 shown.

It is obvious that a length tolerance of a sleeve causes a positional error of the catching means of the subsequent sleeve. Especially with long chucks so the position error can add from sleeve to sleeve.

For this reason, very high demands are placed on the length tolerance of the sleeves. As a rule, the sleeves are made of cardboard. Since the cardboard is subject to changes in length under the influence of moisture, a sleeve can not be reused several times. This causes high costs, in particular due to the fact that the sleeves are expensive due to the catch. On the other hand, the original price of the sleeves is high due to the high tolerance requirement.

It is therefore an object of the invention to provide a method for easy and quick loading of the chuck of a winding machine with sleeves that even when using used and thus inaccurate with respect to the length sleeves ensures a high position accuracy of the sleeves provided on the catch and thus a high fishing safety ,

This object is achieved by a method with the features of claim 1 and by a device having the features of claim 5 and a winder with the features of claim 19.

In the method according to the invention and the device according to the invention, the sleeve is initially pushed onto the chuck of the winding machine individually or as a stack of sleeves as described in the prior art in a first method step. This process is performed by an operator or a doffer. Subsequently, the sleeves are isolated according to the invention in a second method step and positioned to its desired position. It is possible to perform the second process step for each sleeve sequentially or to perform for several or all sleeves simultaneously. For this purpose, the device has guide means which act on the sleeves held on the chuck.

The sleeves are pushed when pushing up to a stop at the bearing end of the chuck. This process variant facilitates the subsequent separation, since the sleeves must be moved only in one direction.

The subsequent process steps correspond again to the prior art, that is, after positioning the sleeves are stretched as usual.

The advantage of the invention is that the simple and quick operation when loading the chuck of the winding machines is still given. Nevertheless, a high position accuracy of each sleeve regardless of their length and tolerance can be achieved. It goes without saying that the sleeves used in the method according to the invention must be shorter by at least half the length tolerance width than the distance of the nominal positions of the sleeves in order to have room for the separation.

It is indeed from the published patent application DE 197 01315 A1 known to stock pods sparsely on a chuck. The in the DE 197 01315 A1 However, the proposed solution requires that the sleeves must be separated before pushing on the chuck. This means an additional effort for the operator. In addition, the sleeves can not be postponed here as a stack of tubes. However, these requirements were just one of the objects underlying this invention.

In a variant of the method, pawls are moved parallel to the sleeves in the direction of the collar end. Once the pawls detect certain edges of the sleeves, they are taken and moved to an end position. As an edge of the sleeve, for example, offers the sleeve end.

In a particularly preferred variant of the method, the second method step "singulation and positioning" is subdivided into individual substeps. This is first in a first sub-step of the process of pushing apart two adjacent sleeves. In conjunction with the preferred variant of the method described above, this means that in each case the sleeve assigned to the collar end of the chuck is pushed away from the sleeve assigned to the bearing end of the chuck.

In a second substep of the method, a pawl acting as a stop and fixed in the direction of the sleeve axis is introduced into the gap between the rocks. This stop is used to position the sleeve shown. In a third sub-step, one of the sleeves is then moved against the stop and thus into the desired position.

The positioning device according to the invention is preferably formed with a carrier for receiving the guide means, which is arranged immediately adjacent to the side of the chuck. Thus, the held in an untensioned state on the chucks sleeves can be moved back and forth in a simple manner from the outside by the guide means on the chuck for separating and positioning.

However, the guide means could also be integrated directly on the chuck to assign after pushing the sleeves of each sleeve from the sleeve stack out a certain position.

An advantageous development of the positioning device for carrying out the method according to the invention has as a guide means on a pawl which is movable by means of a feed means substantially from a start position to an end position in the direction of the collar end. This pawl has an edge which corresponds to an edge of the sleeve to be moved. First, the pawl is movable in the feed direction until the edge of the pawl with the edge the sleeve comes into contact and takes this. The advancing means then moves the pawl together with the sleeve to an end position. In addition, the pawl is movable in a locking movement, so that on the one hand when contacting the edge of the pawl with the edge of the sleeve, the pawl is movable in the locking direction, on the other hand at the end of the advancing movement, the pawl is movable against the locking direction, so that the edge of the Pawl and the edge of the sleeve come out of contact.

In a variant of the positioning device, a pawl is provided per sleeve, wherein all pawls are moved by a common feed means.

In another variant of the positioning device, a pawl is provided for all sleeves, wherein the feed means is such that the pawl can perform the described movement for each sleeve in succession.

In one embodiment, the pawl or feed means is movable against a stop which defines the end position.

In another embodiment, a sensor is provided which detects the position of the sleeve to be moved, the pawl or the feed means and stops upon reaching the desired position, the feed means.

In particular, in embodiments in which the edge of the pawl cooperates with the edge of the sleeve, which at the same time constitutes the sleeve end, the problem arises that the pawl must be inserted between two adjacent sleeves without damaging the edges of the sleeve. In these cases, the guiding means of the positioning device preferably have a separation device, so that previously two adjacent sleeves are gently separated from one another by applying a yielding force by means of separation means. While the previously described embodiments have axially movable pawls, fixed pawls are used in particularly preferred embodiments described below. Thus, the positions of the pawls correspond to the nominal positions of the sleeves. In order to move the sleeve against the pawl, the separation device has a plurality of yielding separating means, which move the sleeves against the pawls. The yielding action of the separation means prevents the sleeve from being damaged upon contact with the pawl.

Such a yielding separating means may be, for example, a brush mounted on the sleeve and movable in the direction of the collar end of the chuck, which contacts the sleeve surface and initially displaces the sleeve but does not injure the sleeve surface upon contact of the sleeve with the pawl.

Another yielding separating means may be a friction surface placed on the sleeve surface and movable in the direction of the collar end of the chuck. The coefficient of friction between the separating agent and the sleeve is higher than between the sleeve and the chuck.

A further variant of the separation means is an air jet, which acts on the sleeve end and exerts a force on the sleeve in the direction of the collar end, which displaces the sleeve.

In the case that a plurality of separation means are used for each sleeve, there is the problem that increases in a displacement of a sleeve from the bearing end of the chuck in the direction of the collar end, although the distance between this sleeve and the neighboring sleeve in the direction of the collar end, However, the distance is reduced on the other side. Therefore, it is necessary that, with a simultaneous separation of all the sleeves, a coordination means is formed causes the speed of each separation means in the direction of the collar end increases.

In a preferred embodiment, this is achieved by using a tensioned spring as the coordination means between two separation means in each case. In this case, the end facing the collar end is driven by an actuator. The last spring or the last separating agent at the bearing end is supported against a fixed stop. As a result, the individual separation means experience a similar operation to an accordion when the actuator is actuated.

The positioning device according to the invention is preferably installed in a winder. For this purpose, the winder has means with which the positioning device between a rest position and a working position is interchangeable. Here, the working position is to be understood as the position in which the method according to the invention can be carried out. Subsequently, the positioning device is moved to a rest position.

Winding machines usually have two chucks, which are changed by means of a turntable between a winding position and a parking position. Therefore, in a preferred embodiment, the winder has means which track the working position of the positioning device to the chuck moving out of the parking position.

The positioning device according to the invention can likewise be installed in a doffer. This has the advantage that it is no longer necessary to provide a positioning device for each winding head.

An embodiment will be described in more detail below with reference to the accompanying drawings.

Fig. 1

ein Ausführungsbeispiel der Positioniervorrichtung zum Durchführen des erfindungsgemäßen Verfahrens in einer Spulmaschine,

Fig. 2.1 bis.2.3

die Bewegungsabfolge der Positioniervorrichtung aus Fig 1 beim Durchführen des erfindungsgemäßen Verfahrens,

Fig. 3

im Detail eine Alternative der Hülsenkante,

Fig. 4

im Detail eine Alternative der Klinke und der Hülsenkante,

Fig. 5

eine weitere Ausführungsvariante der Positioniervorrichtung,

Fig. 6

eine weitere Ausführungsvariante der Positioniervorrichtung,

Fig. 7

im Detail ein Separationseinrichtung,

Fig. 8

eine bevorzugte Ausführungsvariante der Positioniereinrichtung,

Fig. 9

eine erfindungsgemäße Spulmaschine mit einer Positioniervorrichtung,

Fig. 10

einen Doffer mit einer Positioniervorrichtung.

They show:

Fig. 1

An embodiment of the positioning device for carrying out the method according to the invention in a winding machine,

Fig. 2.1 bis.2.3

the sequence of movements of the positioning of Fig. 1 in carrying out the method according to the invention,

Fig. 3

in detail an alternative of the sleeve edge,

Fig. 4

in detail an alternative of the pawl and the sleeve edge,

Fig. 5

a further embodiment of the positioning device,

Fig. 6

a further embodiment of the positioning device,

Fig. 7

in detail a separation device,

Fig. 8

a preferred embodiment of the positioning device,

Fig. 9

a winding machine according to the invention with a positioning device,

Fig. 10

a doffer with a positioning device.

In FIG. 1 the positioning device 23 for carrying out the method according to the invention in a winding machine 1 is shown. The winder 1 rewinds the continuously tapered threads 2 into coils 5. For this purpose and has the winder on a connected to the housing 3 traversing 3.1, which alternates the threads 2 in Spulenachsrichtung. By Rotation of the clamped on the chuck 4 sleeves 5.1, the coils 5 are generated. The winding head 1 has a second chuck 7 which is in a parking position. The chuck 7 is, as well as chuck 4, cantilevered at a bearing end 7.3, so that sleeves 8 can slide on the collar end 7.2. At the time when the coils 5 have reached their maximum diameter, the chucks 4 and 7, which are connected to a turntable 6, exchanged by rotation of the turntable 6 against each other. It is the task of a yarn guide 9 introduced into the yarn path during this phase to guide the yarns 2 in such a way that the yarns are guided via a catching means 8.1 on the sleeve 8 so that the yarns 2 are carried along by the catching means 8.1 Form at the now in the winding position sleeves 8 coils.

So that a high catch safety is ensured, it is necessary that the catch 8.1 are located in a tightly tolerated position on the chuck 7. In FIG. 1 is shown a winder that winds four threads simultaneously. But there are also winding machines known to wind eight or more threads at the same time. The FIG. 1 represents at the chuck 7, the sleeves 8 in the situation that arises immediately after pushing the sleeves 8 on the chuck 7. The position of the catch means 8.1 on the sleeve 8, which is closest to the collar end 7.2, is influenced by the length tolerance of the other sleeves 8. To avoid this, a positioning device 23 is provided, the individual sleeves 8 by means of guide 11 each to their exact position on the chuck 7 shifts. On the basis of the sleeves 5.1 on the chuck 4 it can be seen that there are small gaps between the sleeves 5.1, which are the result of the action of the positioning device 23. For this purpose, the positioning device 23 has guide means 11 which are formed as a plurality of pawls 12. The pawls 12 are movable in the direction of the axis of the chuck 7 and move the sleeves 8 on the chuck 7 to its desired position.

In FIGS. 2.1 to 2.3 the sequence of movements of the guide means 11 is shown in carrying out the method according to the invention. First, the sleeves 8 are pushed onto the chuck 7. This is done either manually by putting each sleeve on the chuck. By pushing the other sleeves 8, a sleeve stack is formed, which is pushed onto the chuck 7 to the stop 10. Also, a sleeve stack can be pushed through a doffer. After pushing the sleeves 8, the positioning device 23, which was previously in a rest position, moved perpendicular to the axis of the chuck 7 against the sleeves 8. For this purpose, the positioning device 23 has a carrier 15, which is guided by means of a guide 16 in the direction of the chuck 7 movable. On the carrier 15, a carriage 14 is provided which is movable in the direction of the axis of the chuck 7. On the carriage 14, the pawls 12 are mounted, which act resiliently against the sleeves 8. At the beginning of the positioning of the slots 14 is in a start position, which is defined here by a stop 18. The positioning process will be as in Figure 2.2 shown with the method of the carriage 14 from the start position to the end position in which the carriage 14 moves against the stop 17, performed. In this case, the tips of the resiliently acting on the sleeves 8 pawls 12 each engage in the gap between two adjacent sleeves 8. It can be seen that the distance between the pawls 12 is greater than the length of the sleeves 8. Thus, the first detects the collar end 7.2 adjacent pawl 12, the opposite sleeve 8. Thus, this sleeve is also moved furthest. By the pawls 12 one after the other sleeve 8 is taken and moved to its desired position. This is in Figure 2.3 shown. Subsequently, the carrier 15 is moved back to a rest position and the carriage 14 is returned to the starting position.

In FIG. 3 is shown in detail an alternative of the sleeve edge. While in FIG. 2 the pawl had to engage in the gap between two adjacent sleeves 8, here is simplified with a step 8.2 the collapse of the pawl 12, so that the edge 12.2 of the pawl 12 securely comes into contact with the edge 8.4 of the sleeve 8. In particular, it is advantageous here that a smaller force with which the pawl 12 presses against the sleeve 8 is required, so that less damage to the surface of the sleeve 8 results here when the pawl 12 is moved along the sleeve 8. In the FIG. 3 is the stage 8.2 at - seen in the direction of movement of the pawl - end of a sleeve. The edge 8.4 is here at the beginning of the sleeve. However, it is also possible to provide the step 8.2 and the edge 8.4 at the other location of the sleeve 8.

FIG. 4 shows in detail another alternative. Here, the pawl 12 has a wedge-shaped shape, which can be easily inserted into a gap, which results through phases 8.3 at the ends of two adjacent sleeves 8. A spring 12.1 provides the force required to penetrate the gap.

FIG. 5 shows a variant of the positioning. In contrast to the preceding figures, only one pawl 12 is provided here. This pawl 12 is mounted on a holder 14.1, which is mounted in the direction of chuck movable on the carriage 14. This is shown here by a hinge. A pin 14.2, and which is connected to the holder 14.1, cooperates with a curve 14.3. The curve 14.3 is shaped so that the edge 12.2 of the pawl 12 leaves the web 14.4. As a result, each sleeve 8 is pushed one after the other to its desired position.

Another embodiment is in FIG. 6 shown. In contrast to FIG. 5 the movement of the holder 14.1 is effected by an actuator 14.5. This actuator 14.5 is driven on the basis of signals generated by a sensor 14.6 on the basis of marks 14.7, so that the edge 12.2 of the pawl 12, the in FIG. 5 shown web 14.4 leaves.

FIG. 7 shows in detail a separation device 24, which would be used as a guide means 11 in a positioning device. To be damaged by the To avoid pawl 12 on the surface of the sleeve 8, a separating means 19 is additionally provided on the carriage 14. This separating means 19 has at its contact surface to the sleeve 8, for example, a friction lining or a brush. The task of the separation means 19 is to transfer frictional forces to the sleeve surface of the sleeve 8.

FIG. 8 shows a particularly preferred embodiment of the positioning device 23. In contrast to the preceding figures, the pawls 12 are fixed here. For this purpose, only the separation means 19 of a separation device 24 are connected to the carriage 14 and movable. Between two separation means 19 each springs 20 are clamped. The separation means 19 at the collar end is connected to an actuator 21, for example a pneumatic cylinder. Since the force with which the actuator 21 acts on the separating means 19 is distributed over all the springs 20, this causes the separating means 19 to move apart like a concertina in a movement of the actuator 21. This corresponds exactly to the requirements that are also placed on the movement of the sleeves 8. During this process, the pawls 12 are softly pressed against the sleeves. Since the concertina-like movement of the separating means 19 and thus of the sleeves 8 open gaps between the adjacent sleeves, the pawls 12 spring easily even when the force applied is less. Upon further movement of the separation means 19, the sleeves 8, which are located on the bearing end side of the respective pawls 12, pressed against the pawl 12 now in gap. Since friction acts between the separating means 19 and the sleeves 8, the separating means 19 now slide under the sleeve 8 until the separation of the means 19 has ended. Subsequently, the positioning device 23 is driven back again and the actuator 21 is moved to its initial position. In the FIG. 8 Each sleeve 8 is associated with a movable separation means 19. However, it is also possible not to move the bearing end 7.2 associated sleeve 8, the first sleeve already by the Stop 10 is sufficiently well positioned. In this case, the storage end 7.3 associated separation means 19 and spring 20 can be omitted.

FIG. 9 shows a winding machine, which is connected to a positioning device 23. The function of the winding machine was already in FIG. 1 described, so that only details will be discussed here. As already described, the chuck 7 with the sleeves 8 is in a parking position. With the growth of the coil 5, the turntable 6 is rotated further continuously or at intervals. A movement means 22 in the form of a pivoting arm is connected to the positioning device 23. This pivot arm 22 is rotatably connected to the housing 3 of the winder 1, which can be spent in a rest position 22.1 and in a working position 22.2, the positioning device 23. In addition, it is possible with this movement means 22 to track the working position 22.2 of the effected by the turntable 6 movement of the chuck 7.

In FIG. 10 a doffer is shown with a positioning device. The doffer 13 is movable relative to the winding head and pushes with a pusher 13.1 sleeves 8 on the chuck 7 of the winder 1. At the same time, the doffer 13 has a boom 13.2 on which the positioning device 23 is provided. The advantage of this design is that only one common positioning device 23 is required for several winding heads.

LIST OF REFERENCE NUMBERS

1.

Dishwasher

Second

thread

Third

casing

3.1

Traversing device

4th

chuck

5th

Kitchen sink

5.1

shell

6th

turntable

7th

chuck

7.1

clamping means

7.2

Kragende

7.3

bearing end

8th.

shell

8.1

capture means

8.2

step

8.3

chamfer

8.4

edge

9th

thread guides

10th

attack

11th

guide means

12th

pawl

12.1

feather

12.2

edge

13th

doffer

13.1

Abschieber

13.2

boom

13.3

holder

14th

carriage

14.1

holder

14.2

spigot

14.3

Curve

14.4

train

14.5

actuator

14.6

sensor

14.7

mark

15th

carrier

16th

guide

17th

Stop for end position

18th

Stop for start position

19th

separation means

20th

feather

21st

actuator

22nd

flap

22.1

rest position

22.2

working position

23rd

positioning

24th

separation device

Claims (20)

1. Method for positioning a plurality of tubes in a winding machine (1) for winding up yarns (2), in which the winding machine (1) has a clamping chuck (7), which projects at a projecting end (7.2) and is rotatably mounted at a mounting end (7.3), for carrying the tubes (8), the tubes each having take-up means (8.1) at a particular point, over which the yarns (2) are passed for take-up, and in which the tubes (8) are individually or collectively pushed onto the clamping chuck (7) from the projecting end (7.2) as far as a stop (10) at the mounting end (7.3) so as to form a tube stack, characterized in that a positioning device (23) is used to separate the tubes (8) on the clamping chuck (7) and slide each of them in just one direction from the mounting end (7.3) in the direction of the projecting end (7.2) and to position them to a setpoint position to ensure high take-up reliability, the separation and positioning of the tubes (8) being carried out for several tubes at a time or for each individual tube in succession.
2. Method according to Claim 1, characterized in that the separation and positioning of the tubes (8) is carried out by means of a pawl (12) which moves parallel to one of the tubes (8) from the mounting end (7.3) in the direction of the projecting end (7.2), the pawl (12) initially being moved until one edge (12.2) of the pawl (12) comes into contact with one edge (8.4) of the tube and the tube (8) being taken along in positive engagement as far as an end position.
3. Method according to Claim 2, characterized in that the pawl (12) is pressed resiliently against the tube (8) during the movement.
4. Method according to Claim 1, characterized in that, to separate and position the tubes (8), two adjacent tubes (8) are first of all pushed apart, in that a pawl (12) is introduced into a gap formed between the tubes, and in that the tube edge (8.4) of one of the tubes (8) is pushed against the pawl (12).
5. Positioning device for a winding machine (1) for carrying out the method according to one of Claims 1 to 4, in which the winding machine (1) has a clamping chuck (7), which projects at a projecting end (7.2) and is rotatably mounted at a mounting end (7.3), for carrying the tubes (8), which each have take-up means (8.1) at a particular point, over which the yarns (2) are passed for take-up, and in which the tubes (8) are individually or collectively pushed onto the clamping chuck (7) from the projecting end (7.2) as far as a stop (10) at the mounting end (7.3) so as to form a tube stack, characterized by guiding means (11) for separating and positioning the tubes (8) on the clamping chuck (7), which guiding means (11) make it possible for the separation and positioning of the tubes (8) to a respective setpoint position to ensure high take-up reliability to be carried out for several tubes at a time or for each individual tube in succession, by moving the tubes in just one direction from the mounting end (7.3) in the direction of the projecting end (7.2).
6. Positioning device according to Claim 5, characterized in that the guiding means (11) are held on a carrier (15), which carrier (15) is arranged laterally adjacent to the clamping chuck (7) of the winding machine (1).
7. Positioning device according to Claim 5 or 6, characterized in that the guiding means (11) have a pawl (12) which can be moved from a starting position to an end position in the direction of the projecting end (7.2) in a feed motion parallel to the clamping chuck (7) and which can be moved perpendicularly to the axis of the clamping chuck (7) in a second, locking motion, in that the pawl (12) has an edge (12.2) which corresponds to an edge (8.4) of the tubes (8), in that the feed motion is such that, on the way from the starting position to the end position, the edge (12.2) of the pawl (12) comes into contact with the edge (8.4) of the tube (8) and takes the tube (8) along, and in that the end position of the pawl (12) coincides with a setpoint position of the tube (8).
8. Positioning device according to Claim 7, characterized in that one pawl (12) per tube (8) is provided.
9. Positioning device according to Claim 5 or 6, characterized in that a common pawl (12) is provided for all the tubes (8), in that the pawl (12) has a feed motion for each tube, and in that the end position of the feed motion assigned to one pawl is adjoined by the starting point of the feed motion assigned to the adjacent tube.
10. Positioning device according to Claim 7 to 9, characterized in that the end position is defined by a stop, to which the pawl (12) corresponds.
11. Positioning device according to Claim 7 to 9, characterized in that the end position is determined by a sensor (14.6) which detects the position of the pawl or of the tube moved.
12. Positioning device according to one of Claims 5 to 11, characterized in that the guiding means (11) have a separation device (24) which slides the tubes on the clamping chuck (7) through the flexible exertion of a force by separation means (19).
13. Positioning device according to Claim 12, characterized in that a plurality of pawls (12) is provided, which are arranged in a row in the direction of the axis of the clamping chuck (7), in that the pawls (12) have edges (12.2), each of which corresponds to one edge (8.4) of the tubes (8) and which define the setpoint position of the tubes (8) in such a way that a movement of a tube (8) in the direction of the projecting end (7.2) of the clamping chuck (7) is blocked at the setpoint position, and in that there are one or more flexibly acting separation means (19) which move the tubes (8) parallel to the axis of the clamping chuck (7) and in the direction of the projecting end (7.2).
14. Positioning device according to Claim 12 or 13, characterized in that the separation means (19) is a brush which can be moved in the direction of the projecting end (7.2) and is placed on the tube (8).
15. Positioning device according to Claim 12 or 13, characterized in that the separation means (19) is a part which can be moved in the direction of the projecting end (7.2) and has a friction surface which can be placed on the tube (8).
16. Positioning device according to one of Claims 13 to 15, characterized in that a plurality of separation means (19), each for one tube (8), is used, in that, to separate the tubes (8), the separation means (19) are moved in the direction of the projecting end (7.2), and in that there are coordination means (20) which coordinate the movement of the individual separation means (19) with respect to one another in such a way that the distance travelled during the movement increases from separation means to separation means (19), as seen from the mounting end (7.3).
17. Positioning device according to Claim 16, characterized in that the coordination means (20) comprise springs, each clamped between two adjacent separation means (19), and in that an actuator (21) moves the last separation means (19) arranged on the projecting end (7.2).
18. Positioning device according to one of Claims 5 to 17, characterized in that the guiding means (11) are held on a doffer (13) for loading a winding machine (1) for winding yarns (2) onto a plurality of empty tubes (8).
19. Winding machine (1) for winding yarns (2) onto a plurality of empty tubes (8), the winding machine (1) having a clamping chuck (7), which projects at a projecting end (7.2) and is rotatably mounted at a mounting end (7.3), for carrying the tubes (8), and it being possible for the tubes (8) to be pushed individually or collectively onto the clamping chuck (7) from the projecting end (7.2) to the mounting end (7.3), characterized in that a positioning device (23) according to one of Claims 5 to 17 is provided, which can be switched between a rest position (22.1) and a working position (22.2).
20. Winding machine (1) according to Claim 19, characterized in that the clamping chuck (7) is not fixed and in that the positioning device (24) has moving means (22) in order to match the working position (22.2) of the positioning device to the location of the clamping chuck (7).

Images