JP2002145527A - Winder for especially delicate winding material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a winder capable of obtaining signal for controlling a driving device for the winder in proportion to the tensile force of the winding material under the soft treatment of the winding material. SOLUTION: This winder 1 for an especially delicate winding material 8 to be supplied through a supply device 11 is provided with a winding spindle 4 to be driven, a device 14 for detecting the signal for controlling a driving device for the winding spindle 4 in proportion to the tensile force of the winding material 8, and a traverse device 10. The device 14 for detecting the signal proportional to the tensile force of the winding material 8 is provided with the only one pulley 16, and this pulley 16 is arranged on a cantilever arm 15 to be moved within a limited range, and the winding material 8 is directly guided through the pulley 16 between the supply device 11 and the traverse device 10 without using other guide pulley.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to a winding machine for particularly sensitive winding materials fed via a feeding device.
More particularly, a winding spindle comprising a driven winding spindle, a device for detecting a signal for controlling the drive of the winding spindle, which is proportional to the tension of the winding material, and a traverse device. Pertaining to the machine.

[0002]

BACKGROUND OF THE INVENTION Feeders are often not components of a winder, but rather are located at the end of a manufacturing device, such as a spinning or finishing facility, which is arranged in front of the winder. Moreover, a special running section provided with a guide pulley is provided on the winder. Sensitive winding materials are understood as meaning, for example, winding materials consisting of thread-like or band materials, in particular carbon or glass fibers, which are sensitive to bending and / or friction. In particular, multiple changes of direction of the winding material, especially at large winding angles and small radii, can cause unacceptable damage to the winding material. In a known dancer arm device, a double swinging of the winding material is typical.

A winder of the type mentioned at the outset is known from DE 37 23 593 A1. The winding machine has a winding spindle driven via a controllable drive. On the winding spindle,
A tube containing the winding material to be wound is fitted. The winding material is dispensed onto the tube by a traverse device or other thread guiding mechanism. A dancer arm device is provided in front of the traverse device. The dancer arm device is used to detect a signal proportional to the tension (tensile force) of the winding material and to control the driving device of the winding spindle. Known dancer arm devices are fixed 2
It has one guide pulley and one movable dancer arm provided therebetween. The winding material is wound around these two pulleys like a pulley device. Changes in thread tension result in movement of the dancer arm. The magnitude and direction of this movement are detected. This signal is used by the control circuit as a manipulated variable. In this case, the drive motor is controlled so that the tension of the winding material resumes its original value. The tension of the winding material is generated by the dancer arm itself. To that end, the dancer arm is influenced by spring force and / or weight. On the other hand, the tension of the winding material generated in this way must be applied or overcome by the drive motor of the winding spindle during winding. The torque of the winding spindle generated by the drive motor depends on the control voltage of the motor and the number of revolutions corresponding to the motor characteristic curve. Torque control is performed. The number of revolutions of the take-up spindle depends on the feed rate of the take-up material and the diameter of the winding formed on the take-up spindle.

[0004] From EP 0 712 374 a winder for yarns running at a constant speed is known. The winding machine is provided with a traverse device for reciprocating the yarn in a direction transverse to the yarn traveling direction. A winding spindle driven via a motor is provided. Here too, a dancer arm device consisting of two stationary guide pulleys and one guide pulley supported by the dancer arm serves as a device for detecting a signal proportional to the tension of the winding material. Here, too, the winding material is guided around the plurality of guide pulleys, partly in opposite directions at a large winding angle. As a result, the winding material is urged by a very large bending stress, a double bending and a frictional force. This leads to damage or destruction of the winding material, especially for sensitive winding materials.

[0005] DE 2905713 discloses a device for measuring the tension of a running yarn by means of a fixed yarn guide. This thread guide guarantees a straight running path for the running thread. The yarn reaches the fixedly arranged first head yarn guide from the supply device and travels on the traverse device, before being wound on the last driven winding spindle from the intermediately arranged device. Reaches the second thread guide. Both fixed guides are provided with a force transmitting member and a yarn deflection device. The force transmitting member has a thread contact surface at which the thread rubs and thus the cantilever arm is bent at the takt of the thread deflection device. At maximum deflection and at zero crossing of the traverse device, the yarn tension is measured via a strain measuring device. However, here too, the device for detecting the tension of the web material comprises at least two stationary guides. The disadvantage of this winding machine is that the winding material wears out too many times, which is unacceptable with sensitive winding materials.

[0006]

The problem underlying the present invention is that a signal for controlling the drive of the winding machine, which is proportional to the tension of the winding material, provides a very easy handling of the winding material. It is to provide a winder of the kind mentioned at the outset, obtained below.

[0007]

According to the invention, according to the invention, a device for detecting a signal proportional to the tension of a winding material comprises a single pulley, which can be moved within a limited range. This is solved by being arranged on a suitable cantilever arm, the winding material being guided directly between said feeding device and the traversing device via said only pulley and not being guided by another guiding pulley.

The invention starts with the idea that instead of the three guide pulleys used in the state of the art, only one pulley is provided and the movement of this one pulley detects the tension of the winding material. . This provides a signal which acts on the drive motor of the winding spindle via the control device. The only pulley is mounted on a movable, in particular swingable or bendable, cantilever arm. The movement is limited to a very narrow range of different orders than the movement of the dancer arm. At that time, it is not possible to omit the winding around one pulley. However, by increasing the diameter of one pulley, the radius of curvature can be increased. Thereby, the winding material can be bent relatively easily and in only one direction on the pulley. Guide pulleys or guides as stationary separate elements known in the prior art are omitted. That function is taken over by another device. The only pulley is located directly between the end of the supply device and the traverse device. That is,
No other guide pulley is provided between the end of the supply device and the traverse device for biasing the winding material. In the state of the art, the tension of the winding material occurs between the two guide pulleys. In the case of the subject object, the tension of the winding material occurs between one pulley and the winding spindle. The tension of the winding material is no longer generated by the dancer arm, but by the drive of the winding spindle. That is, the drive motor of the take-up spindle does not compensate for the deviation of the tension of the take-up material, but only determines the tension of the take-up material. The winding material enters the traverse device directly from a single pulley. This advantageously increases the distribution triangle. A device for detecting a signal proportional to the tension of the winding material requires a relatively small number of parts, so that it is compact and can be manufactured at low cost. Without additional mechanical components such as guide pulleys, various characteristics of the tension change during the winding process can be produced. This is easily achievable because the thread tension is applied only by the drive motor of the winding spindle. Decreasing, increasing or constant tension values can be stored, for example, in the form of a software table. This tension value can be called up easily and reproducibly. Since the winding material is wound around only one pulley, the bending stress and frictional force of the winding material are greatly reduced. The only pulley movement at the free end of the cantilever arm is only a few tenths of a millimeter. That is, the winding angle of the winding material on the single pulley hardly changes, and the running shape of the winding material is almost constant throughout the winding process.

A device for detecting a signal proportional to the tension of the winding material, wherein the cantilever arm movable within a limited range is formed as or comprises a bending beam, detects the bending. It is particularly advantageous to provide at least one sensor for this purpose. Since the cantilever arm can be formed directly as a bending beam, it is only necessary to clamp and support the cantilever arm on one side and to use the bending of the winding material running through only one pulley. In addition, the cantilever arm functions almost only as a lever arm, and can itself be connected to a bending beam bent via the lever arm. Thus, the lever arm can be consciously enlarged under appropriate installation conditions. The bending beam has a sensor for detecting bending. This sensor can be placed directly on the bending beam or can be in contact with the bending beam. In particular, a strain gauge is used as the sensor, but a force sensor, a displacement sensor or the like may be used. Each sensor can be directly equipped with an electronic evaluation device.
With this electronic evaluation device, a bending electrical signal, in particular a voltage, is converted. The combination of the sensor and the electronic evaluator allows for a small compact structure.

Further, the cantilever arm is formed and supported as a balance rod, and a device for detecting a signal proportional to the tension of the winding material is provided for detecting the force of the winding material on a single pulley. At least one sensor can be provided. The balance rod can be formed as a control lever. The pole of the balance is formed to be sufficiently rigid,
It is pivotally mounted at the center or off-center. Thereby, the force exerted on the only pulley by the winding material is transmitted to the sensor. even here,
As the sensor, a strain gauge, a force sensor or the like can be used.

An advantageous embodiment of the cantilever arm is a bending beam, on which a strain gauge is mounted. At one end of the bending beam, it can be clamped and supported by a take-up machine stand, a strain gauge can be arranged approximately in the central area of the cantilever arm, and only one pulley can be provided at the free end. In this case, it is advantageous if the strain gauge is attached to the bending plane of the bending beam and arranged on the bending beam.

The bending beam has a predetermined bending range, and the strain gauge is arranged in the predetermined bending range. Such a planned bending range can be formed as a weakened portion of the bending beam. As a result, the elastic bending deformation at this location where the strain gauge is arranged is very effectively performed. Or, since the beam is usually in the form of a cylindrical bar, the intended bending area has a flat surface due to flattening. On this flat surface, a strain gauge can be mounted very simply and effectively.

A limited bendable bending beam is located in the case tube, and an adjustable stop for limiting the bend is provided in the case tube. The adjustable stop can be formed by an adjusting screw. The case tube simultaneously protects the bending beam, the sensor and the electronic evaluation device.

When the winding machine has a plurality of winding heads, each of which has one drive spindle and one traverse device, the tension of the winding material attached to each winding head is reduced. The device for detecting the proportional signal can be arranged together in a separate machine unit for each single pulley. The device with only one pulley
Relatively far from the traverse device of each winding head,
It can be arranged in a separate machine unit. Thereby,
The distribution triangle is very long and the difference in tension of the winding material caused by the distribution is reduced.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention;

FIG. 1 shows an important part of the winder 1. The winding machine 1 has a machine base 2, which is a front plate 3.
I support. A winding spindle 4 is rotatably supported on the front plate 3. This winding spindle, as is known, passes through the front plate 3 and extends outwardly to a free end. The take-up spindle 4 is driven by a drive motor. This drive motor is not shown for clarity. The winding spindle 4 is supported around a bearing 5 so as to be limited and swingable. In order to enable this swinging movement, the front plate 3 is provided with an elongated hole 6. A tube (sleeve) 7 is fitted on the winding spindle 4. The winding material 8 is wound on this tube. The start of the winding process, ie the winding process, is indicated by a solid line. The position of the drive spindle 4 with the winding formed at the end of the winding process is indicated by a two-dot chain line.

In the area of the front plate 3, a rotatable contact roll 9 is mounted on the winding spindle 4 and is fixedly supported. The tube 7 on the winding spindle 4 contacts the outer circumference of the contact roll 9 at the start of the winding process. This contact is replaced by the surface of the winding on which the winding material 8 is formed during the winding process. A traverse device (reciprocating device) 10 is attached to the contact roll 9 and particularly to the winding spindle 4. The traversing device distributes the winding material 8 over the length of the tube 7, as is known.

The winding material 8 is fed from a supply device 11 by an arrow 12
To the winder 1 in the direction of. The supply device 11 is not part of the winding machine 1 but is mounted, for example, at the end of a production unit for the winding material 8. The winding material 8 is continuously supplied to the winding machine 1 by this manufacturing unit.
However, the supply device 11 may be arranged within the range of the winder 1. The supply device consists of two rolls or pulleys for guiding the winding material 8, which is guided without change in direction.

A device 1 for detecting a signal proportional to the tension of the winding material 8 for controlling the drive of the winding spindle 4
4 is provided on a special machine unit 13 supported on the machine base 2. The device 14 has a cantilever arm 15 formed as a substantially cylindrical shaft. The cantilever arm is clamped and supported at its end near the machine unit 13 and has at its protruding free end a pulley 16 for guiding the winding material 8. The pulley 16 is the only pulley for the winding material between the supply device 11 and the traversing device 10, i.e., a redirection guide point. The cantilever arm 15 having the pulley 16 is provided so that the winding material 8 can be wound around the pulley 16 by an appropriate winding angle.
It is arranged and positioned relatively to the supply device 11 and the traverse device 10. The pulley 16 is used to guide the winding material as easily as possible.
It is rotatably supported on the top. It is inevitable that the winding material 8 receives bending stress. However, this bending stress is somewhat different from the ordinary dancer arm device, and is a bending stress to one side, not a swing bending stress. Further, the diameter of the pulley 16 is selected to be relatively large in order to suppress bending stress. During the winding process, the winding material 8 bends the cantilever arm in the direction of arrow 17 with the pulley 16 mounted on the cantilever arm 15. This direction occurs as an angle bisector between the winding material entering and exiting the pulley 16.

The device 14 with the pulley 16 replaces the dancer arm device known from the state of the art consisting of two stationary pulleys and one movable pulley located on the dancer arm. In the case of the subject of this application,
Both guide pulleys are omitted, and the winding material is not subjected to double bending stress. By arranging the device 14 on a special mechanical unit 13, the distance between the traversing device 10 and the device 14 can be as large as possible. Thereby, the distribution triangle (layout triangle) can be formed large. However, the device 14 can be arranged in other areas of the machine base 2.

The device 14 for controlling the drive of the winding spindle 4 which detects a signal proportional to the tension of the winding material 8 operates in a manner fundamentally different from known dancer arm devices. When a dancer arm is used, the tension of the winding material 8 is generated by the dancer arm biased by a spring, a weight or the like, and the drive motor of the winding spindle 4 compensates only for the difference in tension. In the case of an object, the tension of the winding material 8 is applied and prepared only via the drive motor of the winding spindle 4.
The only pulley 16 of the subject application performs the function of a state-of-the-art double guide pulley. In the state of the art, a tension of the winding material 8 is generated between the two guide pulleys. In the case of the subject object, the tension of the winding material is generated between the winding spindle 4 and the pulley 16. In the state of the art, there is a distribution triangle between the last guide pulley of the dancer arm device arranged before the traverse device and the traverse device.
In the case of the subject object, a distribution triangle is created between one pulley 16 and the traverse device 10.

FIG. 2 shows the structure of FIG.
2 shows a cross section along II-II. The device 14 is clear. The device 14 includes a bent beam 18 formed in a cylindrical shape.
Is provided. One end 19 of the bending beam 18 is supported by being fitted into a case tube 20. The case tube 20 itself is supported by the mechanical unit 13. Thereby, one end 20 of the bending beam 18 is fixedly held so that the other end 21 of the bending beam 18 projects freely. A pulley 16 is rotatably supported in the area of the end 21. The bending beam 18 has an intended bending area 22 in the middle area. The expected bending range 22 is formed by flattening and reducing the bending beam 18. The bending beam is provided at this point with a plate-like part 23 having a flat surface. For example, a strain gauge 24 is disposed in the plate-like portion. The strain gauge forms a sensor 25 for detecting the bending of the bending beam 18 due to the tension of the winding material 8. An electronic evaluation device 26 is provided within the end 19 of the bending beam 18 or in any case in the case tube 20. By means of this electronic evaluation device, a voltage signal corresponding to the bending of the bending beam 18 is supplied via a cable 27 to a control device (not shown) for the drive of the winding spindle 4.

The case tube 20 supports an adjustable stop 28 for limiting the bending of the bending beam 18 in the direction of arrow 17. This adjustable stopper 28
Can be formed as adjusting screws. A seal 29 for preventing dust and other foreign substances from entering the case tube 20 is further provided in the front end region of the case tube 20.

FIG. 3 shows the winding machine 1. Five winding heads 30 are arranged on the machine base 2 of the winding machine. Each winding head 30 is formed as described above with reference to FIG. Here, a separate mechanical unit 13 is provided, on which the devices 14 respectively assigned to the winding heads 30 are arranged collectively. Each distribution triangle is a different size. But this is not a disadvantage. This is because the minimum distribution triangle is so long that the change in tension of the winding material 8 due to distribution is negligible. This change in tension is so small that it is intentionally weakened by the fact that the control for the drive of the winding spindle 4 does not react to such a change in tension.

FIG. 4 is a view similar to FIG. 2, showing another embodiment of the apparatus 14. In FIG. The cantilever arm 15 is here formed as a balance rod 31. The rod 31 of this balance is a component formed so as not to bend. This component is mounted, for example, in its central area on a support 32 so that it can rock in a limited manner. The associated sensor 25 is formed here as a force sensor 33 and the mechanical unit 1
3. A force sensor 33 measures the force of the balance rod 31 which is generated at its location and which is applied to the pulley 16 by the winding material 8 during the winding process.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a winding machine.

FIG. 2 is a sectional view of the sensor taken along line II-II of FIG.

FIG. 3 is a view similar to FIG. 1 of a winding machine having five winding heads.

FIG. 4 is a view similar to FIG. 2 of a sensor with a balance rod.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Winding machine 2 Machine stand 3 Front plate 4 Winding spindle 5 Bearing 6 Slotted hole 7 Tube 8 Winding material 9 Contact roll 10 Traverse device 11 Feeding device 12 Arrow 13 Machine unit 14 Device 15 Cantilever arm 16 Pulley 17 Arrow 18 Bending beam 19 end 20 case tube 21 end 22 expected bending range 23 plate-like portion 24 strain gauge 25 sensor 26 electronic evaluation device 27 cable 28 stopper 29 seal 30 winding head 31 balance rod 32 support 33 force sensor

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Helmut Rabe, Germany, Väuretal, Vuinbergstrasse, 68 72) Inventor Jürgen Rohm, Germany, Essiuwege, Bahnhofstrasse, 5 F term (reference) 3F115 AA09 BA02 CA21 CA22 CA23 CB08 CC01 CF35

Claims (7)

[Claims] 1. A winding machine (1) for a particularly sensitive winding material (8) fed via a feeding device (11), comprising a driven winding spindle (4) and a winding machine. Device (1) for detecting a signal proportional to the tension of the material (8) for controlling the drive of the winding spindle (4)
4) and a device (14) for detecting a signal proportional to the tension of the winding material (8) in a winder, comprising a traverse device (10), comprising only one pulley (16). The pulley is arranged on a cantilever arm (15) that is movable within a limited range, and between the supply device (11) and the traverse device (10), the winding material (8)
A winder, which is guided directly via said single pulley and not guided by another guide pulley. 2. The method according to claim 1, wherein the cantilever arm (15), which is movable within a limited range, is formed as a bending beam (18) or has a bending beam and a tension of the winding material (8). An apparatus (14) for detecting a proportional signal comprises:
At least one sensor (2
The winder according to claim 1, further comprising (5). 3. The cantilever arm (15) is connected to a balance rod (3).
A device (14), formed and supported as 1), for detecting a signal proportional to the tension of the winding material (8) detects the force of the winding material (8) applied to only one pulley (16). Winder according to claim 1, characterized in that it comprises at least one sensor (25). 4. A strain gauge (2) is attached to a bending beam (18).
The winder according to claim 1 or 2, wherein (4) is attached. 5. An area in which a bending beam (18) is to be bent (22).
And a strain gauge (2
The winder according to claim 4, wherein (4) is arranged. 6. A limited bendable beam (18) is located in the case tube (20) and an adjustable stop (28) for limiting the bend is provided in the case tube (20). The winder according to claim 4, wherein the winder is provided in the winding machine. 7. A winding machine (1) comprising a plurality of winding heads, each winding head comprising one drive spindle (4) and one traverse device (10); A device attached to the head for detecting a signal proportional to the tension of the winding material (8) (1)
Winding machine according to one of the preceding claims, characterized in that 4) are arranged collectively in separate mechanical units (13) for each single pulley (16).