JP2001278544A - Winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a winding device for winding continuously sent yarn where a driven winding bobbin is held by a bobbin holder between two of rotatably supported tension discs and at least one tension disc comprises a yarn catching device and a clamp gap for clamping the yarn so as to feed the yarn to a new winding bobbin after exchanging the bobbin. SOLUTION: The clamp gap 32 is connected to the tension disc, and the tension disc is composed of a movable clamp body 29 held in a clamping position for clamping the yarn by centrifugal force when rotated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a winding device for winding a sent yarn and a continuously fed yarn to a winding device, which are described as a generic concept of claim 1. Thread,
A method according to claim 12.

[0002]

2. Description of the Related Art A method of feeding yarn with a winding device is disclosed in EP091.
No. 6610 (Bag. 2621).

[0003] In a winding device having a driving roller type driving device, it is general to clamp a winding tube between two tensioning plates which are rotatably mounted on a free end of a fork-shaped bobbin holder. is there. On the one hand, the bobbin holder is configured to be pivotable in order to keep the winding tube in circumferential contact with the drive roller during winding and, on the other hand, to bring the wound bobbin to the replacement position for bobbin replacement. I have.
In the exchange position, the bobbin tightened between the tensioning pans is released, so that the bobbin can be replaced with a new empty bobbin. During the bobbin change, the continuously fed yarn is taken out by the suction device. Feeding and winding the yarn on a new winding tube requires that the yarn be grasped, fixed and cut. For this purpose it is known to attach a gripping and clamping device to one of the tensioning plates. In particular, the fixing of the thread using the tensioning plate must be performed in such a way that the bobbin exchange is not hindered by the tightened loose thread end.

In the winding device known from EP 0916610, a clamping gap is formed between the centering addition of the tensioning plate and the end of the winding tube. This ensures that the loose thread ends are released from the clamping state at the same time as the winding tube is released.

[0005] Therefore, in known solutions, a gap is provided between the end face of the winding tube and the end face of the tensioning dish,
In addition to the necessary clamping, unwanted windings can fall into the gap.

[0006]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to improve a winding device of the type described at the outset and to a method of feeding yarn to a winding device of the type described at the beginning, so that the yarn start of the bobbin is tightened. The plate is to be securely clamped at a distance from the end of the winding tube and to be easily released when the bobbin is replaced.

[0007]

The object is achieved according to the invention by a winding device having the features of claim 1 and a method having the features of claim 12.

The invention has the advantage that the clamping of the thread takes place only during the winding of the bobbin. For this purpose, the clamping gap is formed by a movable clamping body which is connected to a tensioning plate. As a result, the clamping gap has at least one movable side which can influence the clamping of the yarn. The clamping body is brought to a clamping position for clamping the thread by centrifugal force when the tensioning pan rotates. In this case, the recognition is based on the recognition that the winding tube and, consequently, the tensioning plate are driven by a driving roller at high speed when yarn is supplied. In this state, the clamp body is held at the clamp position by the centrifugal force acting on the clamp body, and a clamp gap for clamping the yarn is formed at this clamp position. When replacing the bobbin, the bobbin holder is turned to the replacement position. In this case, the tension plate and thus the bobbin are braked until they stop. As soon as the bobbin stops, the clamp body is no longer centrifugally loaded. The clamp body moves from the clamp position and returns to the release position. This allows the bobbin to be replaced at any time because the thread is unclamped just before or during the stop. Another advantage of the invention is that the loose thread end of the bobbin has a defined, always free length and can be kept particularly short.

[0009] Further advantageous embodiments of the invention are defined in the dependent claims.

In particular, the construction of the winding device according to claim 2 is advantageous for clamping the yarn directly on the tensioning plate. In this case, the support surface of the tensioning plate forms the clamping position of the clamping body. The clamp gap is determined by the shape given to the support surface and the shape given to the clamp body.
It is thus possible to form an acute or obtuse clamp gap, each having one immovable side and one movable side, so that the yarn is introduced into the clamp gap.

In order to ensure that the clamping body is held in the clamping position during the clamping of the thread, according to an advantageous embodiment of the invention, the support surface is formed substantially conforming to the clamping body. This avoids undefined pushing and pulling of the movable clamp body even when the yarn is introduced into the clamp gap.

In order to release the loose thread ends of the bobbin without delay after the tensioning plate has stopped, according to another embodiment of the invention, a spring is provided which acts on the clamp body.
The spring exerts a spring force directed in the opposite direction to the centrifugal force. In this case, since the spring force is smaller than the centrifugal force, the clamp body is retained at the clamp position regardless of the spring force when the tension plate is rotated at the winding speed.

In order to take full advantage of the centrifugal force acting on the clamp body when the tensioning pan rotates, the clamp body is advantageously guided by a guideway from a release position where the clamp body is radially inward. Is guided to be moved to the clamping position.

[0014] In this case, it is advantageous if the clamping body is formed by a sphere and the guide path of the clamping body is determined by a cage formed inside the tensioning plate. As the tensioning pan rotates, the ball is guided in the cage in a freely movable manner between an inner release position and an outer clamp position.

In order to generate a particularly high clamping force, the clamp body is connected to the weight by a guide member, and the clamp body is positioned inward from the release position where the clamp body is located radially outward when the tension plate is rotated. It has been proposed to be moved to a clamping position. In this case, the direction of movement of the clamp body is opposite to the direction of action of the inherent centrifugal force. The centrifugal force acts on the weight which is connected to the clamp body via the guide member and is moved radially outward by the tensioning plate. The radially outward movement of the weight via the guide member is converted into the outwardly inward movement of the clamp body.

In another advantageous embodiment of the invention, the gripping device has a gripping nose and a gripping slit, which gripping nose and gripping slit are provided on the end face of the tensioning plate facing the winding tube. I have. Since the clamping gap is formed at the end of the gripping slit, the gripping and clamping of the thread is possible within a rotation angle of less than 180 °, preferably less than 90 °.

In a further development according to the invention, the gripping slit penetrates, at its end, at least partially through the support surface of the clamping body so that the thread is guided directly from the gripping slit into the clamping gap. This allows the thread sliding along the guide edge of the gripping slit to be introduced directly into the adjacent clamping gap.

A particular advantage of the configuration of the winding device according to the invention according to claim 10 is that the movement of the yarn and the tensioning plate are oriented in the same direction when the yarn is gripped. As a result, the thread running almost obliquely through the edge of the tensioning plate enters the gripping slit immediately after reaching the gripping nose. The crawling of the thread from the gripping slit is not expected due to the given movement in the same direction. The yarn is gripped with high certainty and caught by the nose. With the design of the tensioning plate according to the invention, it is furthermore achieved that the thread is already clamped in the clamping gap after partial rotation of the tensioning plate. The thread guide does not have to change its position.

In order to avoid that the yarn section reaches between the end face of the winding tube and the tensioning plate during feeding and winding of the yarn into the winding tube, another advantageous configuration according to the invention is provided. For example, an annular thread guide edge is provided on the tensioning plate. In this case, the yarn guiding edge covers the end of the tube, so that the yarn is guided directly into the vertical plane of the tube when transitioning from the tensioning plate to the tube.

An embodiment of the winding device according to the present invention will be described below with reference to the accompanying drawings.

[0021]

1 and 2 show one embodiment of a winding device, for example, as used in a textured machine. FIG. 1 shows a state in which the winding device according to the present invention winds a yarn. FIG. 2 shows the winding device in a state where the yarn is attached after the bobbin is replaced.
The following description is based on FIG.
And FIG. 2.

The winding device has a rotatable bobbin holder 4. The bobbin holder 4 is supported on a turning shaft 7. The pivot 7 is fixed to the machine frame. At the free end of the fork-shaped bobbin holder 4, two tensioning plates 5, 6 are supported rotatably so as to face each other. A winding tube 2 for receiving the bobbin 3 is tightened between the tightening plates 5 and 6. For this purpose, the tensioning plates 5, 6 each have a conical centering addition. The centering addition part partially protrudes into the end of the tube.
As a result, the winding tube 2 is centered between the tensioning plates 5 and 6. The tensioning plate 5 has a gripping device 8 for applying the thread to a new winding tube after the bobbin exchange. The structure of the tensioning plate 5 will be described later in detail.

The bobbin holder 4 is provided with a sensor 9 in the region of the tensioning plate 5. The sensor 9 is connected to the control device 15 via a signal line. This control device 15 serves to control the yarn guidance during winding and bobbin change.

As shown in FIG. 2, the control device 15 is connected to a driving device 17 for guiding a yarn guide 16 for applying a yarn.

A drive roller 10 is in contact with the surface of the winding tube 2 or the surface of the bobbin 3. The drive roller 10 is a drive shaft 1
1 is connected to the roller motor 12. The roller motor 12 drives the driving roller 10 at a substantially constant speed. The direction of rotation is indicated by the arrows in FIGS. The drive roller drives the winding tube 2 or the bobbin 3 at a substantially constant peripheral speed by friction.

FIG. 1 shows a winding device for winding the yarn 1 around the bobbin 3. For this purpose, a traverse yarn guide 13 is arranged immediately before the drive roller 10 on the yarn path. The traverse yarn guide 13 is driven to reciprocate in the bobbin area. The drive means can be constituted, for example, by a belt drive or by a counter-rotating screw shaft. In this state, the retracting movement of the gradually winding bobbin is enabled by the bobbin holder 4. Bobbin 3
Is wound to the end, bobbin replacement is performed. For this purpose, the bobbin holder 4 is swiveled to the exchange position.
Therefore, the contact of the bobbin 3 with the drive roller 10 is cut off. When the tensioning plates 5, 6 and, consequently, the bobbin 3 are braked to the stop state, the bobbin 3 is replaced with an empty winding tube 2.
The winding tube 2 is clamped between the clamping plates 5 and 6. Before that, the yarn 1 is transferred by the auxiliary device to the suction device for cutting and suction. FIG. 2 shows the suction device 18 as an example. The suction device 18 has a knife 19 and a suction connection 20. Knife 19 serves to cut the thread during bobbin change. In this case, the sent yarn is guided to the yarn container by the suction connection.

In FIG. 2, the bobbin replacement has been completed, and the bobbin holder is rotated back to the operating position with a new winding tube 2. To attach the thread, the thread 1 is guided by the thread guide 16 towards the tensioning plate 5 and thus the tensioning plate 5
The gripping device 8 can grip a running yarn. At that time, the drive device 17 of the thread guide 16 is actuated by the control device 15 as soon as the sensor 9 signals that the tension plate 5 has reached the predetermined number of revolutions.

3, 4 and 5, the tensioning plate 5 of the winding device described earlier is shown in various directions. Unless otherwise stated, FIG. 3,
4 and 5.

The tensioning plate 5 has an annular edge 25 formed on the tensioning plate end surface facing the winding tube 2. A notch 26 forms a gripping nose 27 and a gripping slit 28 in the edge 25. The gripping nose 27 is undercut by a notch 26 so that the tip of the gripping nose 27 extends in the rotation direction of the tensioning plate 5. The gripping slit 28 has a guiding edge 31 connected to the edge 25, which extends the edge 25 and guides the thread into the gripping slit 28 as the tensioning plate rotates.

At the end of the gripping slit 28, a clamp body 29 which is movable in the radial direction with respect to the tensioning plate is arranged. The clamping body 29 is designed as a sphere, which is guided freely by a radially extending cage 34 on a tensioning plate. The sphere 29 is shown in the clamping position in FIGS. Ball 2 at clamp position
Reference numeral 9 denotes a centrifugal force, which is held on a support surface formed by the notch 26. In this case, the centrifugal force is generated by the rotation of the tensioning plate 5. A clamp gap 32 is formed between the ball 29 and the support surface 33.

The support surface 33 is formed at an end of the grip slit 27. In this case, the end of the grip slit 28 forms a part of the support surface 33.

The winding tube 2 is held by the centering addition portion 22 of the tension plate 5 at the winding tube end surface 23. The centering addition part 22 is formed by a cut 30 in the end face of the tensioning dish. In this case, the cut 30 in the end face of the tensioning plate
A thread guide edge 24 covers the tube end of the tensioned tube and surrounds the tube 2 at a distance from the tube end face 23;
It is located on a vertical plane to the winding tube 2.

In order to grasp and clamp the thread 1 when it is attached, the thread 1 is connected to the thread guide 16 and the suction connection 20.
(FIG. 2), the yarn 1 is guided to run obliquely and to move on the edge 25 of the tensioning plate 5. In this case, the yarn traveling direction of the yarn 1 and the rotation direction of the tensioning plate 5 are directed in the same direction. By the rotation of the tension plate, thread 1 is initially
Is slid along edge 25 until it hits notch 26. In this case, the thread 1 is transferred from the edge 25 to the guide edge 31 and slides under the gripping nose 27 into the gripping slit 28. When the tensioning plate 5 further rotates, the thread 1 is guided into the clamp gap 32 and is clamped between the clamp body 29 and the support surface 33. As the rotation of the tensioning plate 5 proceeds further, the yarn 1 is cut by the cutting device 21 (FIG. 2) at the yarn section between the clamping device and the suction connection.

FIG. 6 shows a state immediately after the thread 1 is clamped on the tensioning plate 5. Due to the rotation of the tensioning plate 5, the thread section between the suction connection 20 and the clamping part of the tensioning plate 5 is guided to the cutting device 21. Cutting device 21
Has a stationary knife with which the thread is cut.

In the state shown in FIGS. 3 to 5, each of the clamp bodies 29 is in the clamp position. This clamp position is maintained while a centrifugal force acting on the clamp body is generated and the tightening body rotates at the number of rotations that holds the clamp body at the clamp position. When the tensioning plate no longer rotates, the thread clamp is released. However, this situation only occurs when the bobbin is replaced. Depending on the position of the tensioning pan, the clamp body either remains on the support surface or is moved radially inward to a release position based on its own weight. In order to be able to open the clamp gap irrespective of the position of the tensioning plate, the clamping body 2 must be resistant against centrifugal force.
Advantageously, a spring acting on 9 is used. Thereby, when the tensioning plate is stopped, the clamp body is pushed to the release position, and the loose thread start end of the bobbin is immediately released.

After the yarn is fixed on the tensioning plate 5 by the clamp body 29, the yarn guide 16 returns the yarn 1 to the traverse area. In this case, the yarn is guided directly onto the surface of the winding tube 2 along the end face of the tensioning plate. The winding of the yarn onto the winding tube 2 can be started. For this purpose, the yarn is transferred to a traverse yarn guide 13. However, it is also possible to guide the yarn between the winding and the yarn gripping only with the traverse yarn guide.
In this case, the delivery of the yarn is simply omitted.

The tensioning pan shown in FIGS. 3 to 6 is designed such that the edge 25 and the thread guide edge 24 are located in one vertical plane in common. This configuration is only an example. The end edge 25 and the yarn guide edge 24 may be configured to be offset from each other by a tensioning plate. The only important thing in this case is that the gap formed between the winding tube end face 23 and the tensioning plate 5 is covered by the thread guide edge 24.

FIG. 7 shows another embodiment of the tensioning dish. The tensioning dish is shown schematically in side view. In this case, a gripping nose 27 and a gripping slit 28 are similarly formed at the edge 25 by the notch 26. A clamp body 35 is disposed at an end of the grip slit 28. The clamp body 35 is movable between the stopper 40 and the support surface 33. The stopper 40 is formed by the lower surface of the grip nose 27. The support surface 33 is formed by a surface located at the notch 26 so as to face the grip nose 27. The clamp body is a guide member 37
And is connected to the weight 38 via. The weight 38 is movably arranged on the tensioning plate on the side opposite to the axis.
The guide member 37 and, consequently, the weight 38 are guided via the guide 36. The spring 3 is provided between the cut 41 and the weight 38.
9 are stretched.

The guide member 37, the guide 36 and the weight 38 are advantageously integrated into the tensioning plate 5 without affecting the tensioning of the winding tube. In this case, the centrifugal force acting on the weight 38 due to the rotation of the tensioning plate 5 causes the weight 38 to be opposed to the spring force of the spring 39 by the tensioning plate in the radial direction and corresponding to the guide 36. To move. The movement of the weight 38 is transmitted to the clamp body 35 via the guide member 37. The clamp body 35 is moved from the release position defined by the stopper 40 to the clamp position, forming a clamp gap 32 between the clamp body 35 itself and the support surface 33. As a result, the yarn gripped by the gripping nose 27 in the gripping slit 28 is clamped in the clamp gap 32.

In the winding device according to the present invention, the yarn is guided and clamped in a clamp gap formed between the clamp body and the support surface to fix the yarn start end of the bobbin. In this case, the side surfaces of the clamp gap can be configured differently depending on the shapes given to the support surface and the clamp body. It is also possible to manufacture the movable side (clamp body) of the clamp gap from a soft material and the immovable side of the clamp gap from a dull material by different choices of material.

Similarly, the gripping device can be formed not by a gripping nose at the edge of the tensioning plate, but by a gripping nose fixed to the end surface of the tensioning plate. What is important for the winding device according to the invention is that the fixing of the thread is related to the centrifugal force generated by the rotation of the tensioning plate. To this extent, the illustrated embodiment is merely an example.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of a winding device according to the present invention in one operation state.

FIG. 2 is a view showing an embodiment of the winding device according to the present invention in an operation state different from the operation state shown in FIG. 1;

FIG. 3 is a perspective view of a tension plate of the winding device of FIG. 1;

FIG. 4 is a side view of a tension plate of the winding device of FIG. 1;

FIG. 5 is an enlarged view of a part of the tensioning plate of FIG. 1;

FIG. 6 is a view showing the tensioning plate of FIG. 1 in a state immediately after a thread is clamped on the tensioning plate.

FIG. 7 is a schematic diagram of another embodiment of a tensioning dish.

[Explanation of symbols]

1 thread, 2 winding tubes, 3 bobbins, 4 bobbin holders, 5, 6 tensioning plates, 7 turning axes, 8 grippers, 9 sensors, 10 drive rollers, 11 drive shafts, 12 roller motors, 13 traverse thread guides,
14 drive means, 15 control device, 16 thread guide, 17 drive device, 18 suction device, 19
Knife, 20 suction connection, 21 cutting device,
22 Centering addition part, 23 Winding tube end face, 24
Thread guide edge, 25 end edge, 26 notch, 27 grip nose, 28 grip slit, 29 clamp body, 30 cut, 31 guide edge, 32 clamp gap, 33 support surface, 34 guide, 35 clamp body, 36 guide, 37 Guide member, 38
Weight, 39 spring, 40 stopper, 41 cut

Claims (12)

[Claims] 1. A winding device for winding a continuously fed yarn (1) using a driven winding tube (2), wherein the yarn (1) is placed on the winding tube (2). Are rotatably supported on a traversing bobbin (3) in the winding area, each having one centering add-on (22) engaging into the winding tube (2). Two tension plates (5, 6)
A bobbin holder (4) for holding a winding tube (2) between them, a yarn gripping device (8) configured to grip a yarn (1), and a yarn (8), which is provided on at least one of the tensioning plates (5, 6). 1) has a clamp gap (32) for clamping the thread (1) entering the suction device (18) using the movable thread guide (16) for grasping the thread (1). The clamp gap (3) is of the type which is guideable and in which the thread (1) is cut after clamping in a thread section in front of the suction device (18) by a cutting device (21).
2) is coupled to the tensioning plate (5), and is a movable clamp body (2) held at a clamping position for clamping the thread (1) by centrifugal force during rotation of the tensioning plate (5).
9; 35).
Winding device. 2. The clamp body (29; 35) contacts a support surface (33) of the tensioning plate (5) at a clamp position,
The winding device according to claim 1, wherein the clamp gap (32) is formed between the support surface (33) and the clamp body (29; 35). 3. The clamp according to claim 2, wherein said support surface has a shape conforming to said clamp body, said clamp body being centered in a clamping position. Winding device. 4. A spring (39) acting on said clamp body (29; 35) is provided, said spring (39) exerting a spring force oriented against centrifugal force, The winding device according to any one of claims 1 to 3, wherein a spring force is smaller than the centrifugal force. 5. The clamping body (29; 35) is guided by a guideway (34) in the tensioning plate (5), the clamping body (29) being radial in rotation of the tensioning plate (5), 5. The winding device according to claim 1, wherein the winding device is adapted to be moved from an inner release position to an outer clamping position. 6. The clamping body is formed by a ball (29), the guideway is formed by a cage (34) in the tensioning plate (5), and the ball (29) is formed by the cage. The winding device according to claim 5, wherein the winding device is movably guided in (34) between an inner releasing position and an outer clamping position. 7. The clamping member (35) includes a guide member (3).
7), the clamp body (35) is moved in a radial direction from an outer release position to an inner clamp position when the tensioning plate (5) is rotated. Any one of claims 1 to 4
The winding device according to the item. 8. The gripping device (8) comprises a gripping nose (2).
7) and a gripping slit (28), wherein the gripping nose (27) and the gripping slit (28) are connected to the tension plate (5).
8. The device according to claim 1, wherein the clamping gap is provided at an end face of the gripping slit, the end facing the winding tube. The winding device as described in the above. 9. The thread (1), which slides along the guide edge (31) of the gripping slit (28) at its end at least partially through said support surface (33). 9. Winding device according to claim 8, guided by a clamping gap (32) formed at the end of the gripping slit (28). 10. A gripping nose (27) and a gripping slit (28) are formed by a notch (26) in an edge (25) of the tensioning plate (5), and a thread guide (1) is provided.
6), tensioning plate (5) and suction device (18) for gripping thread (1), thread (1) pulls tensioning plate (5) to tensioning plate (5)
The winding device according to claim 8, wherein the winding device is disposed so as to pass obliquely in the rotation direction. 11. A thread guide edge (24) circulating in said tensioning plate (5) is provided, said thread guide edge (24) covers the winding tube end (23) and the thread (1) is wound. The winding device according to claim 1, wherein the winding device is guided in a plane perpendicular to the winding tube for winding the winding tube. 12. A method of winding a continuously fed yarn using a driven winding tube, wherein the yarn is supplied onto the winding tube and then wound on a twill bobbin in a winding region. The bobbin holder is rotatably supported on a bobbin holder.
Tensioned between the two tensioning plates, the thread being gripped by a gripping device in the tensioning plate, wherein the thread running into the suction device is gripped by means of a movable thread guiding guide. Of the type in which the thread is guided to a thread gripper on the dish and the thread is cut by a cutting device after clamping and guided for winding on a winding tube through a thread guide, the clamp being clamped by centrifugal force when the tensioning dish rotates. A method for winding continuously fed yarn, wherein the yarn is clamped by a movable clamp body held at a clamp position forming a gap.