EP1129975A2 - Winding apparatus - Google Patents

Abstract

The clamping gap (32) is formed by a clamping body (29) capable of movement. This is connected to the clamping disc, which on rotation, causes the body to move out through centrifugal force, into a clamping position, so holding the thread. An Independent claim is included for the corresponding method of thread winding. Preferred features: In action, the clamp rests against a surface (33) of the clamping disc, body and surface together forming the clamping gap. Surface and clamping body have congruent shape, centering the body. A spring acts against the body, opposing but overcome by the centrifugal force. The clamp is guided in a path (34) of the clamping disc, through which it moves radially outward, on rotation. In one design, the body is a ball, the guide path formed by a cage or retention structure inside the clamping disc, permitting free motion between inner and outer positions. A further variant is described, is based on similar principles. An interception projection and slot (27, 28) are formed on the end of the clamping disc facing the spool. The clamping gap is at the end of the slot, which partly passes through the resting surface, such that a thread sliding along the slot, is led in through the gap at its end. Slot and projection are built into a recess (26) in the edge (25) of the clamping disc. Thread guide, clamping disc and a suction unit intercept the thread in an arrangement causing the thread to run over the end face of the clamping disc, in its direction of rotation. A further edge guide (24) surrounding the thread, is fitted to the clamping disc. This covers the ends of the casing and guides thread winding onto the spool.

Description

The invention relates to a winding device for winding a incoming thread according to the preamble of claim 1 and a method for placing a continuously running thread in a Winding device according to the preamble of claim 12.

The winding device and the method for applying are from EP 0 916 610 (Bag. 2621).

In the case of winders with a drive roller drive, it is common to use the cores to be clamped between two clamping plates, which can be freely rotated at the free ends a fork-shaped coil holder are attached. The bobbin holder is pivoted to the sleeve on the one hand during winding in To keep peripheral contact with the drive roller and on the other hand to Changing the bobbin to bring the wound coil into a change position. In the sleeve is clamped between the clamping plates released so that the coil can be replaced with a new empty tube can. During the bobbin change, the continuously running thread discharged by means of a suction device. To put on and start up the Thread on the new sleeve, it is necessary that the thread caught, fixed and is severed. For this purpose, it is known to capture and clamp devices on one to attach the clamping plate. In particular, the thread is fixed with the Execute clamping plate in such a way that a spool change is not caused by the loose pinched thread end is hindered.

The winding device known from EP 0 916 610 therefore provides that a Clamping gap between a centering shoulder of the clamping plate and the sleeve end is formed. This ensures when the sleeve is released that at the same time the loose thread end is released from the clamp.

In the known solution there is therefore a gap between the end face of the sleeve and the front wall of the clamping plate, so that there is a risk that in addition the required clamping also unwanted wrap in the gap can come up with.

Accordingly, it is an object of the invention to provide a take-up device mentioned type and a method for applying a thread in a Continuing winding device of the type mentioned in such a way that the Secure thread start of a bobbin on the tensioning plate at a distance from the sleeve end can be clamped and easily released when changing the bobbin.

The object is achieved by a winding device with the Features according to claim 1 and by a method with the features according to Claim 12 solved.

The invention is characterized in that the clamping of the thread only during the winding of the spool. For this, the clamping gap is through formed a movable clamp body which is connected to the clamping plate. The clamping gap thus has at least one movable flank through which the Clamping of the thread can be influenced. The clamp body is when the Clamping plate by a centrifugal force in a clamping position for clamping the Thread. This is based on the knowledge that the sleeve and thus the tension plate when threading at high speed through the Driving roller to be driven. In this state, the clamp body is through the centrifugal force acting on the clamping body in a clamping position held in which the clamping gap for clamping the thread is formed. When changing the bobbin, the bobbin holder is in a change position pivoted, the clamping plate and thus the coil to a standstill be slowed down. As soon as the coil stops, the clamping body is no longer burdened by centrifugal force. The clamping body is released from the Clamping position and can be moved back into a relief position. So that will immediately before or during standstill the thread is released, so that the spool is ready to change. Another advantage of the invention lies in that the loose thread start of the bobbin is a defined and always has constant free length, which are kept particularly short can.

Further advantageous developments of the invention are in the subclaims Are defined.

In particular, the configuration of the winding device is according to claim 2 preferred to clamp the thread directly on the tensioning plate. The The contact surface of the clamping plate forms the clamping position of the Sprag. The clamping gap is due to the shape of the contact surface and determined by the shape of the clamp body. So there is the possibility for example an acute-angled clamping gap or an obtuse-angled one To form a clamping gap with a fixed flank and a movable flank, in which the thread is inserted.

To the clamping body in the clamping position during the clamping of the thread According to an advantageous development of the invention, keeping it safe is Contact surface with a substantially opposite the clamping body congruent shape. So even when the thread is introduced in the nip an undefined pushing away of the movable clamp body avoided.

After the tension plate has stopped, the loose thread start of the bobbin released immediately, is according to a further embodiment of the invention a spring acting on the clamping body is provided, one for centrifugal force opposite spring force is generated. The spring force is smaller than that Centrifugal force, so that the clamping body with the rotation of the clamping plate Winding speed defies spring force in the clamping position.

To make high use of the centrifugal forces acting on the clamping body To obtain rotation of the clamping plate, the clamping body is preferred by guided a guideway such that the clamping body in the radial direction the internal relief position to the external clamping position is moved.

The training in which the Clamping body is formed by a ball, the guideway by a Cage formed within the clamping plate is determined. When the The ball is then clamped between the inside Relief position in the cage freely movable to the outside Clamping position led.

In order to be able to build up particularly high clamping forces, it is proposed that To connect the clamping body with a weight by means of a guide element, that when the clamping plate rotates the clamping body in the radial direction from the external relief position moved to the internal clamping position becomes. Here, the direction of movement of the clamping body is opposite the direction of its own centrifugal force. The centrifugal force acts on a weight which is connected to the clamping body via the guide element and on Clamping plate is moved radially outwards. About the guide element radially from the inside outward movement of the weight in one of implemented inward movement of the sprag.

In a particularly advantageous development of the invention, the Catcher a catch and a catch slot on the sleeve facing end face of the clamping plate are introduced. The nip is on End of the catch slot formed so that the catch and that clamping of the Thread within an angle of rotation of less than 180 °, preferably less than 90 °, is possible.

So that the thread leads directly from the catch slot into the clamping gap is provided according to an advantageous development of the invention that the catch slot with its end the contact surface of the clamping body at least partially penetrated. This is the on a leading edge of the catch slot along sliding thread directly into the adjacent nip.

The formation of the winding device according to the invention according to claim 10 is particularly characterized in that the thread and the tension plate at Catches are moving in the same direction. With that, essentially Thread running diagonally over the front edge of the tensioning plate immediately after Immerse the catch in the catch slot. Climbing out the Thread from the catch slot is not closed due to the movement in the same direction expect. The thread is caught with a high degree of certainty by the catch nose. Through the The inventive design of the clamping plate is further achieved that the thread is already in the clamping gap after a partial rotation of the tensioning plate is clamped without the thread guide having to change its position.

To prevent that during threading and threading a piece of thread in the gap between the end face of the sleeve and the clamping plate arrives, according to an advantageous further development Clamping plate provided a circumferential thread guide edge. The thread leading edge covers the sleeve end, so that the thread at the transition from Clamping plate is guided to the sleeve directly in a normal plane to the sleeve.

An embodiment of the winding device according to the invention is in following described with reference to the accompanying drawings.

Fig. 1 und Fig. 2

ein Ausführungsbeispiel der erfindungsgemäßen Aufwickeleinrichtung in verschiedenen Betriebssituationen;

Fig.3, 4 und 5

schematische Ansichten des Spanntellers der Aufwickeleinrichtung aus Fig. 1;

Fig. 6

schematisch eine Ansicht des Spanntellers aus Fig. 2 beim Fangen des Fadens;

Fig. 7

schematisch ein weiteres Ausführungsbeispiel eines Spanntellers.

They represent:

1 and 2

an embodiment of the winding device according to the invention in different operating situations;

Fig. 3, 4 and 5

schematic views of the clamping plate of the winding device from Fig. 1;

Fig. 6

schematically a view of the tension plate of Figure 2 when catching the thread.

Fig. 7

schematically another embodiment of a clamping plate.

In Figures 1 and 2 is an embodiment of an inventive Winder shown, such as in a texturing machine is inserted. In Fig. 1, the winding device according to the invention Winding the thread shown. 2, the winding device is after the bobbin change when threading is shown. The following Description applies to both Figures 1 and 2, insofar as not expressly to one the figures are referenced.

The winding device has a pivotable bobbin holder 4 which a pivot axis 7 is mounted. The pivot axis 7 is at one Machine frame attached. At the free end of the fork-shaped bobbin holder 4, two opposing clamping plates 5 and 6 are freely rotatable. Between the clamping plates 5 and 6 there is a sleeve 2 for receiving a coil 3 curious; excited. For this purpose, the clamping plates 5 and 6 each have a conical Centering approach that partially protrudes into the sleeve end. So that is the sleeve 2 centered between the clamping plates 5 and 6. The clamping plate 5 has one Catcher 8 to change the thread to the new one after a bobbin change Sleeve. The structure of the clamping plate 5 will be explained in more detail below described.

A sensor 9 is provided on the coil holder 4 in the area of the clamping plate 5, which is connected to a control device 15 via a signal line. The Control device 15 is used to control the thread guide during the Winding and during the reel change.

As shown in FIG. 2, the control device 15 has a drive 17 coupled, which leads a thread guide 16 for applying the thread 1.

One lies on the surface of the sleeve 2 or on the surface of the coil 3 Driving roller 10 on. The drive roller 10 is connected via a drive shaft 11 to a Roller motor 12 connected. The roller motor 12 drives the drive roller 10 in the substantially constant speed. The direction of rotation is by one Arrow marked in Figures 1 to 2. The drive roller drives through friction the sleeve 2 or the coil 3 with a substantially constant Peripheral speed.

In Fig. List the winding device when winding the thread 1 to the bobbin 3 shown. For this purpose, one is directly in the thread run in front of the drive roller 10 Traversing thread guide 13 arranged, which by a drive means 14th is driven oscillating within a winding area. The drive means can for example by a belt drive or by a Reverse thread shaft to be executed. In this situation Evasive movement of the constantly growing coil 3 through the coil holder 4 enables. After the bobbin 3 is finished, a bobbin change executed. For this purpose, the coil holder 4 is pivoted into a change position, so that the coil 3 is out of contact with the drive roller 10. As soon as the clamping plate 5 and 6 and thus the coil 3 are braked to a standstill, the coil 3 replaced by an empty sleeve 2, which is between the clamping plates 5 and 6 is clamped. Previously, the thread 1 by auxiliary devices in a Hand over suction device for cutting and suction. 2 is a suction device 18 is shown as an example. The suction device 18 has a knife 19 and a suction connection 20. The knife 19 is used for cutting the thread when changing the bobbin, with the incoming thread is led through the suction connection to a yarn container.

In Fig. 2 the bobbin change is completed and the bobbin holder with a new one Sleeve 2 pivoted back into its operating position. For putting on the thread the thread 1 is passed through the thread guide 16 in the direction of the tension plate 5 guided so that the clamping plate 5 with the catching device 8 the running thread 1st can catch. The drive 17 of the thread guide 16 is thereby Control device 15 activates as soon as sensor 9 reaches a predefined speed of the clamping plate 5 signals.

In Figures 3, 4 and 5, the clamping plate 5 is that previously described Winder shown in different views. The following Insofar as no express reference is made, the description applies to the Figures 3, 4 and 5.

The clamping plate has a circumferential end edge 25 which is on the sleeve 2 facing end of the clamping plate 5 is formed. In the front edge 25 is a catch nose 27 and a catch slot 28 are formed by a recess 26. The Catch 27 is undercut by the recess 26 such that the tip of the Catch 27 shows in the direction of rotation of the clamping plate 5. The catch slot 28 has a leading edge 31, which is connected to the front edge 25 and one in Extension of the front edge 25 deflecting guidance of the thread in the Catch slot 28 caused by rotation of the clamping plate.

At the end of the catch slot 27 is a radial direction to the clamping plate movable clamp body 29 arranged. The clamping body 29 is here as Ball formed by a cage extending in the radial direction 34 is freely guided on the clamping plate. The ball 29 is shown in FIGS. 3, 4 and 5 in shown a clamping position. In the clamping position, the ball 29 is through a centrifugal force is held on a contact surface formed by the recess 26. The centrifugal force is generated by the rotation of the clamping plate 5. Between the ball 29 and the contact surface 33, a clamping gap 32 is generated.

The contact surface 33 is formed at the end of the catch slot 27, the End of the catch slot 27 represents a section of the contact surface 33.

The sleeve 2 is with the sleeve end face 23 on the centering shoulder 22 of the Tension plates held. The centering projection 22 is through an incision 30 in the End face of the clamping plate is formed. Here, through the incision 30 Thread leading edge 24 generated on the end face of the tensioning plate 5. The incision 30 in the front of the clamping plate is designed such that the Thread leading edge 24 covers the sleeve end of the clamped sleeve and on a normal plane of the sleeve 2, which is at a distance from the sleeve end face 23 stretched over the sleeve.

In order to catch and clamp the thread 1 when putting it on, the thread 1 is through the thread guide 16 and the suction port 20 (Fig. 2) guided such that the Thread 1 overflows the end edge 25 of the tensioning plate 5 in the oblique run. Here are the thread running direction of the thread 1 and the direction of rotation of the tension plate 5 rectified. By turning the tension plate, the thread 1 is first slide along the end edge 25 until the thread 1 hits the recess 26. The thread 1 is transferred from the front edge 25 to the leading edge 31 and slides behind the catch nose 27 into the catch slot 28. With further rotation of the tension plate 5, the thread 1 is guided into the clamping gap 32 and between the clamping body 29 and the contact surface 33 clamped. With further rotation of the tension plate 5, the thread 1 in the thread section between the Clamping and the suction connection by the cutting device 21 (FIG. 2) cut.

In Fig. 6, the situation immediately after the thread 1 is clamped on the Chuck 5 shown. By turning the tension plate 5, the thread piece between the suction port 20 and the clamping in the clamping plate 5 in the Cutting device 21 out. For this purpose, the cutting device 21 has one stationary knife through which the thread is cut.

In the situation shown in FIGS. 3 to 5, the clamping body 29 is located each in the clamping position. This clamping position is from the clamping body observed as long as the clamping plate rotates at a speed so that the resulting centrifugal force acts on the sprag and the Clamping body holds in the clamping position. As soon as the clamping plate is no longer turns, the clamping of the thread is released. However, this condition only occurs in the event of a bobbin change. Depending on the position of the Clamping plates either due to its own weight on the contact surface remain or moved to a radially inner relief position. To a Opening the clamping gap regardless of the position of the clamping plate enable, a spring is preferably used, which counteracts the centrifugal force acts on the clamping body 29. This ensures that when the Clamping plate the clamp body is pressed into its relief position and the loose thread start of the bobbin is released immediately.

After the thread is fixed in the clamping plate 5 by the clamping body 29, the thread guide 16 will guide the thread 1 back into the traversing area. The thread on the front of the clamping plate is directly on the Surface of the sleeve 2 out. The thread winding on the sleeve 2 can kick off. For this purpose, the thread 16 is transferred to the traversing thread guide 13. It However, it is also possible that the thread during winding and during of the catch is only guided by the traversing thread guide. This does not apply only the handover of the thread.

The clamping plate shown in Fig. 3 to 6 is designed such that the Front edge 25 and the thread guide edge 24 lie together in a normal plane. This version is exemplary. The front edge 25 and the thread leading edge 24 can also be offset on the clamping plate. The only important thing here is that that is formed between the sleeve end face 23 and the clamping plate 5 Gap is covered by the thread guide edge 24.

7 shows a further exemplary embodiment of a clamping plate. The Clamping plate is shown schematically in a side view, with on the front edge 25 also a catch nose 27 and a catch slot 28 through a recess 26 are trained. Here is in the recess at the end of the catch Clamping body 35 arranged between a stop 40 and a Contact surface 33 is movable. The stop 40 is through the bottom of the Nose 27 formed. The contact surface 33 is through a through the recess 26 opposite surface to the nose 27 formed. The sprag is coupled to a weight 38 via a guide element 37. The weight 38 is movable on the clamping plate on the side opposite to the axis arranged. The guide element 37 and thus the weight 38 is on the Guided tour 36. Between an incision 41 and the weight 38 is one Spring 40 tensioned.

The guide element 37, the guide 36 and the weight 38 are preferred integrated in the clamping plate 5 without the clamping of the sleeve 2 influence. Here, by rotating the clamping plate 5 one on the Weight 38 attacking centrifugal force cause the weight 38 to be radial corresponding to the guide 36 on the clamping plate to the outside against the spring force of Spring 40 moves. The movement of the Weight 38 transferred to the clamp body 35. The clamp body 35 will from its relief position, which is defined by the stop 40, in the The clamping position moves and forms one between itself and the contact surface 33 Clamping gap 32. Thus, in the catch slot 28 of the catch nose 27 detected thread are clamped in the clamping gap 32.

In the winding device according to the invention is used to fix the Thread beginning of a bobbin of thread in the between the clamping body and guided and clamped a contact surface formed clamping gap. You can by shaping the contact surface and the clamping body, the flanks of the Clamping gap can be designed differently. So it is also possible to go through different choice of material the movable flank of the clamping gap (Sprag) made of a softer material and the solid flank of the To produce the clamping gap (clamping plate) from a blunt material.

It is also possible not to use a safety catch in the safety gear Front edge of the clamping plate but by one on the front side of the clamping plate to form a fixed catch nose. Essential for the invention Winding device is that the fixing of the thread depends on one the rotation of the clamping plate is centrifugal force. So far they are The exemplary embodiments shown are only examples.

Reference list

1

thread

2nd

Sleeve

3rd

Kitchen sink

4th

Spool holder

5

Clamping plate

6

Clamping plate

7

Swivel axis

8th

Safety gear

9

sensor

10th

Pressure roller

11

drive shaft

12th

Roller motor

13

Traversing thread guide

14

Drive means

15

Control device

16

Thread guide

17th

drive

18th

Suction device

19th

knife

20th

Suction connection

21

Cutting device

22

Centering approach

23

Sleeve face

24th

Thread leading edge

25th

Front edge

26

Recess

27

Catch nose

28

Slot

29

Sprag, ball

30th

incision

31

Leading edge

32

Clamping gap

33

Contact surface

34

Leadership, cage

35

Sprags

36

guide

37

Guide element

38

Weight

39

feather

40

attack

Claims (12)

Winding device for winding a continuously running thread (1) with a driven sleeve (2) on which the thread (1) is wound into a cross-wound bobbin (3) within a bobbin area, with a bobbin holder (4) which holds the sleeve (2) holds between two rotatably mounted tensioning plates (5, 6), each with a centering projection (22) engaging in the sleeve (2), with a catching device (8) designed to catch the thread (1) in at least one of the clamping plates (5, 6) and with a clamping gap (32) for clamping the thread (1), the thread (1) entering a suction device (18) being guided for catching by means of a movable thread guide (16) and the thread (1) after clamping by means of a cutting device (21) is cut in the thread section in front of the suction device (18), characterized in that the clamping gap (32) is formed by a movable clamping body (29; 35) which is connected to the tensioning plate (5) and which is held by a centrifugal force in a clamping position for clamping the thread (1) when the tensioning plate (5) rotates. Winding device according to claim 1, characterized in that the clamping body (29; 35) in the clamping position rests on a contact surface (33) of the clamping plate (5) and that the clamping gap (32) is located between the contact surface (33) and the clamping body (29 ; 35) trains. Winding device according to claim 2, characterized in that the contact surface (33) has a congruent shape with respect to the clamping body (29; 35), so that the clamping body (29; 35) is centered in the clamping position. Winding device according to one of claims 1 to 3, characterized in that a spring (39) acting on the clamping body (29; 35) is provided, which produces a spring force counter to the centrifugal force, the spring force being smaller than the centrifugal force. Winding device according to one of claims 1 to 4, characterized in that the clamping body (29; 35) can be guided on the clamping plate by a guide track (34) such that when the clamping plate (5) rotates, the clamping body (29) extends in the radial direction an internal relief position is moved to the outer clamping position. Winding device according to claim 5, characterized in that the clamping body is formed by a ball (29), that the guideway is formed by a cage (34) within the clamping plate (5) and that the ball (29) in the cage (34) is freely movable between the internal relief position and the external clamping position. Winding device according to one of Claims 1 to 4, characterized in that the clamping body (35) is connected to a weight (38) by a guide element (37) in such a way that when the tensioning plate (5) rotates, the clamping body (35) in the radial direction is moved from an external relief position to the internal clamping position. Winding device according to one of the preceding claims, characterized in that the catching device (8) has a catching nose (27) and a catching slot (28) which are introduced on the end face of the clamping plate (5) facing the sleeve (2), and in that the Clamping gap (32) is formed at the end of the catch slot (28). Winding device according to claim 8, characterized in that the end of the catch slot (28) at least partially penetrates the contact surface (33) so that the thread (1) sliding along a guide edge (31) of the catch slot (28) in the end of the catch slot (28) formed in the clamping gap (33). Winding device according to claim 8 or 9, characterized in that the catch nose (27) and the catch slot (28) are formed by a recess (26) in the end edge (25) of the tensioning plate (5) and that the thread end guide (16), the Tensioning plate (5) and the suction device (18) for catching the thread (1) are arranged relative to one another in such a way that the thread (1) overlaps the end edge (25) of the tensioning plate (5) in the direction of rotation of the tensioning plate (5). Winding device according to one of the preceding claims, characterized in that a circumferential thread guide edge (24) is attached to the tensioning plate (5), which covers the sleeve end (23) and the thread (1) for winding on the sleeve (2) in a normal plane leads to the sleeve (2). Method for applying a continuously tapering thread in a winding device with a driven sleeve, on which the thread is wound after application within a winding area to a cross-wound bobbin, in which the sleeve is clamped between two rotatably mounted tensioning plates of a bobbin holder, in which the thread is passed through a Catching device is caught on the tensioning plate, in which the thread is clamped by a clamping gap, in which the thread entering a suction device is guided for catching by means of a movable thread guide to the catching device of the tensioning plate and in which the thread is cut by means of a cutting device after clamping and is guided by the thread guide for winding onto the sleeve, characterized in that the thread is clamped by a movable clamping body which, when the tensioning plate is rotated, by a centrifugal force in a clamping position to form the clamping gap is held.

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