JPS6026580A - Thread winding method - Google Patents

Abstract

PURPOSE:To prevent the slack of a thread from occurring when switching from a full bobbin to a vacant bobbin by accelerating the rotation speed of a winding bobbin holder by 0.1-2.0% directly prior to the thread switching operation then switching to a vacant bobbin. CONSTITUTION:When the winding of a bobbin holder 5 reaches a predetermined quantity, the output from a controller 14 is gradually increased and is inputted to an inverter 10', the control power of the frequency and voltage in response to the signal from the inverter 10 is fed to a motor 9, and holder 5' is accelerated to a preset speed. At a predetermined time after a motor 9' is activated, turret rotating motor 11 is activated by the output of a sequence controller 13. At the same time, a control signal augmented by 0.1-2.0% is applied to the inverter 10 from the controller 14 to accelerate the rotation speed of the bobbin holder 5, the winding tensile force is increased to activate a thread switching mechanism, and the full bobbin is switched to the vacant bobbin 30 of the bobbin holder 5'. Accordingly, no slack of the thread occurs during switching and the success rate is improved.

Description

[Detailed description of the invention] The present invention relates to an improvement in a yarn winding method.

More H? When winding yarn such as fine denier using a winding device that directly drives multiple bobbin holders with an electric motor, the S is designed to ensure that switching from a full bobbin to an empty bobbin is possible. This is what I did.

Generally, when winding spun yarn continuously, a winding device is used in which multiple bobbin holders are installed protruding from a rotatable turret and each bobbin holder is directly driven by an electric motor. . To control the rotation of the bobbin holder, the yarn tension during winding is detected and compared with a preset tension, and if the detected tension is greater, the rotation speed is reduced to keep the winding speed constant. It is being done. When switching from a full bobbin to an empty bobbin with such a winding device, the yarn switching mechanism such as the yarn removal guide and yarn gathering guide comes into contact with the yarn, so unless the winding tension is increased, the yarn Looseness occurs before the switching mechanism, making it difficult to switch the yarn properly. For this reason, the set tension for rotation control is increased, and the yarn is switched using a tension amplifier that is generated by increasing speed as the winding becomes thicker. With this method, in the case of thick denier yarn, the winding diameter increased in a short time, so it was possible to switch yarns without any problems, but in the case of fine denier yarn, even if the set tension was increased, the yarn was still thin. There was a problem in that the winding diameter did not increase within a short period of time, making it impossible to obtain the required tension, and the yarn switching mechanism became slack at the front, making it impossible to switch the yarn.

Therefore, the present invention was developed as a result of various investigations into methods of applying tension that can reliably switch the yarn from a full bobbin to an empty bobbin, and that will not cause the fine denier yarn to break or deform. .

That is, the present invention provides a method in which a plurality of bobbin holders directly driven by an electric motor are arranged, and the yarn is continuously wound by switching from a fully wound bobbin to an empty bobbin, and the winding is performed immediately before starting the yarn cutting operation. To provide a yarn winding method in which the rotational speed of a bobbin holder inside the bobbin holder is increased by 0.1 to 2.0 inches compared to the current rotational speed, and then the bobbin is completely replaced with an empty bobbin.

The present invention focuses on the fact that the winding tension increases as the number of rotations on the winding side increases, and actively increases the number of rotations of the bobbin holder.

The numerical value for increasing the rotational speed of the bobbin holder was found to be in the range of 0.1 to 2.0 inches after various changes were made in the yarn type, thickness, winding speed, etc.

When the rotation speed of the bobbin holder was increased within this range, the yarn could be switched from a fully wound bobbin to an empty bobbin without any problem.

In addition, the amount of increase in the number of rotations of the bobbin holder is set to 0. When the tension is less than Lφ, the tension required for the yarn switching mechanism cannot be obtained, and the yarn switching failure rate is almost the same as that of the conventional yarn switching mechanism. Further, when the increase amount was 2.0% or more, the threads were frequently broken, making it impossible to switch the threads.

A schematic diagram of a winding device for implementing the winding method of the present invention is shown in FIG. 1, a control block diagram is shown in FIG. 2, and a block diagram of a controller is shown in FIG. 3, and will be explained based on the drawings.

A winding device 2 is installed below the body rolls l and l', and a guide 3 for regulating the yarn path and a tension detector 4 are provided in the middle of the winding device 2. The winding device 2 includes bobbin holders 5, 5'
The turret 6 is composed of a protruding turret 6, a traverse device 7 for traversing the thread onto a bobbin, and a frame 8, and the turret 6 is rotatably mounted on the frame 8.
The bobbin holders 5, 5' are moved alternately to the multi-winding position and the standby position. The traverse device 7 is attached to the frame 8 so as to be movable in the vertical direction, and the traverse device 7 is provided with a yarn switching mechanism (not shown) consisting of a touch roll, a yarn removal guide, and a yarn shifting guide.

A control diagram of the winding device is shown in FIG. 2, and a rotating electric motor 9,9' whose rotation is controlled by an inverter 1O110' is connected to the bobbin holders 5, 5'.

An electric motor 11 for rotation is connected to the turret 1-6, and an electric motor 12 for driving a traverse guide is connected to the traverse device 7.

The rotation of the electric motors 9 and 9' for rotating the Hochin Holter is controlled by inverters to and to' based on output signals from the sequence unit 13 and the controller 14. The rotation of the electric motor 11 for rotating the turret and the electric motor 12 for driving the traverse guide is controlled based on the output signal from the Sequence Uniso I-13.

The controller 14 is a system shown in FIG. 3, and is composed of a tension control system and a speed control system. Tension detection circuit 1
Reference numeral 5 inputs a signal detected by the tension detector 4 to a comparison circuit 20. The tension setting circuit 16 sets the tension at the time of winding, and the tension setting up circuit 17 sets the tension increase at the time of yarn switching. The output signal of the tension setting circuit 16 is sent to the adder circuit 18.
The signal is inputted to the comparator circuit 2o via. The output signal of the tension setting amplifier circuit 17 is inputted to the addition circuit 18 via the relay contact 19, added to the input from the tension setting circuit 16, and inputted to the comparison circuit 20. Comparison circuit 2 (1: The output signal is input to the automatic gain adjustment circuit 2L only when the input from the detection circuit is larger than the input from the setting circuit.The output signal is increased by the automatic gain adjustment circuit 21 and integrated. The signals input to the circuits 22 and 22' are integrated and sent to the output adder circuit 29 via relay contacts 23 and 23' as output signals of the tension control system.
．． 29'.

The initial speed setting circuit 24 sets the initial speed at the start of winding, and the speed setting asop circuit 25 sets the speed increase at the time of yarn switching (0.1 to 2.0φ increase in winding speed).
is set. The output signal of the initial speed setting circuit 24 is input to the slow start circuits 27, 27' via relay contacts 26, 26'. The slow start circuits 27 and 27' are configured to output an output signal so as to accelerate at a predetermined I-1 constant at an initial speed set from startup. The speed control system output signals from the slow star 1 circuits 27 and 27' and the speed film constant up circuits 25 and 25' are input to output adder circuits 29 and 29'. The tension control system signal and the speed control optical signal input to the output adder circuit 29, 29'! ; is output as a control signal to the inverter 10, 10'. Relay contacts 19, 23.23', 26.26', 2
8.28' is opened and closed by the operation of a relay (not shown) provided in the sequence unit 13 and controller 14.

To explain the winding operation by the above-mentioned winding device, first input the tension at the time of winding into the tension setting circuit 16, input the increase in tension at the time of yarn switching into the tension setting up circuit 17, and input the tension at the time of winding into the tension setting circuit 17. The initial speed at the start is input to the initial speed setting circuit 24,
The speed setting amplifier circuit 25 sets the speed increase at the time of yarn switching.
Enter. Also, the empty bobbin 3 is placed in the bobbin holder 5, 5'.
Attach 0.

Next, turn on the switch (not shown) for starting the winding device 2.
and start driving. When it is confirmed that the bobbin holder 5 is in the multi-winding position, the relay contact 26 of the controller 14 closes, and the output signal of the initial speed setting circuit 24 is input to the slow start circuit 27. The output from the slow start circuit 27 gradually increases, and this increases the output from the output adder circuit 2.
9 to the inverter l as a control signal to the controller 14.
The inverter IO also supplies control power with frequency and voltage corresponding to this signal to the motor 9 for rotating the bobbin holder. This control power activates the stain mower 9 and accelerates it to a set speed. When the bobbin holder 5 reaches the set speed, the electric motor 12 for driving the traverse guide
is rotated based on the output signal from the sequence unit 13, and the spun yarn is hung on the body rolls 1 and 1', and passed through the tension detector 4 and the guide 3 to the bobbin holder 5.
The empty bobbin 30 attached to the bobbin 30 is wound with τ1, and is traversed by the traverse device 7. When the threading operation is completed, the relay contact 23 closes and a signal from the tension control system is input to the output addition circuit 29. As the winding 9 of the yarn progresses and the winding thickness gradually increases, the speed on the winding side becomes faster than the speed on the exit side of Godero/l/l', and the winding tension increases.

Therefore, the tension detected by the tension detector 4 is the tension detected by the tension detection circuit 1.
5 to the comparator circuit 20 and compared with the signal input from the tension setting circuit 16. If the input signal on the detection side is larger, the signal is input from the comparator circuit 20 to the automatic gain adjustment circuit 21.

This signal is amplified by the automatic gain adjustment circuit 21 and integrated by the integrator circuit 21.
2 starts integration, and is input to the output adder circuit 29 as a subtraction signal.

Therefore, the output signal from the output adder circuit 29 is input to the inverter 10 as a control signal smaller than the initial speed setting value. The inverter 10 supplies predetermined control power to the motor 9 for rotating the bobbin holder based on this control signal. Therefore, the rotational speed of the bobbin holder 5 is slowed down and the winding speed (winding tension) is controlled to be always constant. The rotation control described above is repeated until the winding is completed.

When the winding progresses and reaches the predetermined winding amount, the controller 1
No. 4 relay contact 26' is closed and the output signal of the initial speed setting circuit 24 is input to the slow start circuit 27'. The output from the slow start circuit 27' gradually increases by 1, and this is input from the output addition circuit 29' to the inverter 10' as a control signal for the controller 14, and the inverter IO
Control power with a frequency and voltage corresponding to this signal is supplied from the motor 9' to the motor 9' for rotating the bobbin holder.

This control power starts the electric motor 9' and accelerates it to the set speed. When the electric motor 9' for rotating the bobbin holder is started and a predetermined time has elapsed, the sequencer 13
The electric motor 11 for rotating the turret based on the output signal from
is activated and rotates Taleno 1-6. At the same time as this operation, the relay contact 28 of the controller 14 and the relay contact [
19 closes. When the relay contact 28 closes, the output signal from the speed setting up circuit 25 is input to the output addition circuit 29, and the output signal from the controller 14 is sent to the inverter 10 as a control signal with a preset increment added.
is input. The inverter IO supplies control power corresponding to this control signal to the electric motor 9 for rotating the bobbin holder. As a result, the rotation speed of the bobbin holder 5 is fast.
The winding tension also increases. However, since the relay contact 19 is closed at the same time, the output signal from the tension setting up circuit 17 is input to the adder circuit 8, added to the output of the tension setting circuit [6, and input to the comparison circuit 20. Therefore, the determination is made using a value larger than the tension at the time of winding, and even if there is a change in tension due to a change in rotational speed, the rotational speed is not controlled to be slow.

With the rotational speed of the bobbin holder 5 increasing and the winding tension increasing, a yarn switching mechanism (not shown) is operated to regulate the yarn path and then the yarn is switched. When the yarn is switched from the full bobbin 30' of the bobbin holder 5 to the empty bobbin 30 of the bobbin holder 5', and the rotation of the turret 6 is completed and the bobbin holder 5' moves to the winding position, the controller 14 Relay contact 19.2
3, 26, and 28 are opened, and the rotation of the electric motor 9 is stopped.

On the other hand, the relay contact 23' of the controller 14 closes the motor 9' for rotating the bobbin holder, and the tension control system signal is input to the output addition circuit 29', and the rotation of the motor 9' for rotating the bobbin holder is controlled in the same manner as in the case of the motor 9 for rotating the bobbin holder. Ru.

When the bobbin 30 of the bobbin boulder 5' is fully wound, the yarn i is switched to the empty bobbin 30 of the bobbin holder 5 by performing the same yarn switching operation as in the double series.

Although the invention can be implemented as described above, it is not limited to the examples.

The zero inventory device may be one that detects tension and controls rotation, but it may also be one that detects speed and controls rotation.

Although a structure may be used in which an electric motor is connected to the bobbin holder and rotated, a structure in which a gear or the like is interposed between the bobbin holder and the electric motor to transmit rotation may also be used.

0 It can also be carried out with a configuration in which two bobbin holders are protruded from a rotatable turret, but it is also possible to use two winding devices, move the yarn with a chain, etc., and use the winding devices alternately. can also be implemented.

The increment set and output in the zero speed setting amplifier circuit may be made to correspond to the winding diameter, or may be a constant value regardless of the winding diameter.

○The timing for applying the speed up signal may be slightly earlier or later than the start of the yarn switching operation.

As described above, the present invention increases the rotational speed of the bobbin holder during winding by 0.1 to 2.0 inches just before starting the yarn switching operation, and then switches to an empty bobbin. Since the thread does not become slack when switching to an empty bobbin, the success rate of thread switching can be improved.

Moreover, it can be easily applied to an existing winding device.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing one embodiment of a winding device for carrying out the present invention. FIG. 2 is a control block diagram of the present invention, and FIG. 3 is a block diagram of the controller. 2: Winding device, 4: Tension detector, 5.5': Pobbin holder, 6: Turret, 9.9': Motor for rotating bobbin holder, 1 (1, 10': Invert, 11: Motor for rotating Turret, 13: Sequence unit, 14.
Controller, 15: Tension detection circuit, 16: Tension setting circuit, 17: Tension setting up circuit, 18: Adding circuit, 19
゜2;U, 23', 26, 26', 28
, 28': Re-contact, 20: Comparison circuit, 21 Automatic gain adjustment circuit, 22.22': Integrating circuit, 24: Initial speed setting circuit, 25: Speed setting up circuit, 27.27'
Nislo-start circuit, 29.29': Output addition circuit,
. Applicant Toray Engineering Co., Ltd. Figure 1

Claims (1)

[Claims] (1) In a method in which a plurality of bobbin holders driven by a direct tlL motor are arranged and the yarn is continuously wound by switching from a full bobbin to an empty bobbin, the winding process is performed immediately before starting the yarn switching operation. A method for winding yarn, characterized in that the number of revolutions of a bobbin holder is increased by 0.1 to 2.0% relative to the number of revolutions at that time, and then the bobbin is switched to an empty bobbin.