JPS5826768A - Constant-speed winder - Google Patents

Abstract

PURPOSE:To enhance rate of success in winding a yarn, providing an initial- speed setter which controls the speed at the time of winding up the yarn, and a circumferential-speed setter which controls the speed at the time of usual winding. CONSTITUTION:In the winder 4, the rotating speed of a take-up bobbin is controlled by a speed controller 8. The speed controller 8 consists of the initial- speed setter 16, the circumferential-speed setter 17 which determines an actual winding speed and a tension for winding, a controlling circuit which gradually lowers the rotating speed of the take-up bobbin only in the case where the speed detected by a winding speed detector 3 is higher than the predetermined winding speed and maintains the rotating speed of the bobbin at a constant value in the other cases, and a minor loop controlling circuit which reduces the variations in the tension of the yarn at the time of winding. Accordingly, the winding speed can be kept constant, the variation in the tension of the yarn at the time of winding can be reduced, and the rate of success in winding can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a constant speed winding device in which the rotation of an electric motor connected to a winding shaft is controlled by an inverter.

Generally, the speed of a winding machine for winding synthetic fiber yarn is controlled by detecting the tension of the yarn and controlling the rotational speed of the winding shaft based on the tension. However, when winding a very pongee yarn with a low tension, it is difficult to accurately detect the tension using the tension detection devices currently in use. Furthermore, as shown in Figure 1, the relationship between the change in winding thickness and the change in the rotational speed of the winding shaft as the yarn is wound is that even if the winding thickness is constant, the rate of decrease in the rotational speed of the winding shaft is There are 8 cases in which the winding layer is not linear but varies greatly at various points in the thickness direction of the wound yarn layer. Furthermore, in order to increase the success rate when winding the thread, there was an 8-speed method that changed the speed during thread winding and normal winding.

The present invention was obtained as a result of studies aimed at solving the problems in the winding control.

That is, the present invention provides a device for detecting the winding speed of a yarn and a winding device for controlling the rotational speed of a winding bobbin using a speed control device. / has an initial speed setting device and a circumferential speed setting device that determines the actual winding speed and winding tension,
A control circuit that gradually reduces the rotational speed of the winding bobbin only when the detected speed is higher than the predetermined winding speed, and maintains the rotational speed of the winding bobbin constant in other cases. By constructing a minor loop control circuit that reduces yarn tension fluctuations during winding, the winding 11X speed is kept constant, and the constant speed that reduces yarn tension fluctuations during winding and improves the thread winding success rate. A winding device is provided.

A schematic control system diagram of one embodiment of the constant speed winding device of the present invention is shown in FIG. 2, and its configuration will be explained based on the drawing.

2 is a yarn that is wound at a constant speed, 2 is a traverse fulcrum guide, and 3 is a yarn winding speed detecting device i'/. Reference numeral 4 denotes a winding machine for winding a yarn, and a winding shaft 5 and an electric motor driving the winding shaft 5 contact the yarn wound on the winding shaft 5 and roll it at the same speed as the yarn. Follow-up rotating roller bail 7
etc. Reference numeral 8 denotes a speed control device which receives a signal from the speed detection device 3 to control the rotational speed of the winding device 4.
The signal from the converter 9 and the set value of the circumferential speed setter 17 which sets the winding speed during normal winding are compared and amplified. Comparator 11, which is activated only by the output of the amplifier IO, an automatic gain control amplifier 12A, which amplifies the output from the comparator 11, and a switch 13, which switches the control circuit.
A, 13B, an integral 514 that integrates the output from the term intermediate unit 12A with automatic gain control, and an output of the operational term intermediate unit IO.
] Automatic gain control intermediate device 12B and initial speed setting device 1
6, the subtraction signal from the integrator 14 and the addition/subtraction signal from the automatic gain control amplifier 12B are manually operated. Intensifier 15 and initial speed setting 41 that determines the initial speed
6, and a circumferential speed setting device 17 for determining the winding speed. 18 is an inverter that receives a control signal from the speed control device 8 and outputs control power corresponding to a change in the signal. Ru.

1) Speed control operation 5 in the constant speed winding device having configuration 1j will be explained.

First, set the switching devices 13A and 13B to the a side circuit, and turn the speed control device 8 and inverter switch 8 switches (not shown) to O.
Set it to N. The speed control device 8'j3 and the inverter 18
When the circuit is turned ON, a preset initial speed signal is applied from the initial speed setting device 16 to the lever multiplier 15,
The output of the operand intermediate unit 15 is supplied to the inverter 18 as a control signal of the speed control device 8. The control signal supplied to the inverter 18 is converted into control power and the winding device 4
Electric power 1'A 6 i is supplied to rotate the electric motor 6.

At the same time, the winding shaft 5 connected to the electric motor 6 also rotates. As the winding shaft 5 rotates, the roller bail 7 that is in contact with the bobbin inserted into the winding shaft 5 also rotates.

In the above state, thread the yarn l onto the bobbin inserted into the winding shaft 5.
= Jke Start winding.

Here, in order to facilitate the winding of the yarn, the initial speed of the winding shaft 5 is set to a number 96 greater than the speed of the yarn 1.

When yarn winding starts, switch 1:3A circuit is switched to a.
Switch from side to b side. Integrator 14 by switching the circuit
starts working. At this point, the output of the integrator 14 is zero, so the rotational speed of the winding shaft 5 does not change. As the yarn is wound around the bobbin attached to the winding shaft 5 and the winding thickness of the yarn gradually increases, the winding speed increases and the rotational speed of the roller veil 7 increases. Therefore, the output signal of the speed detection device 3 that detects the rotation speed of the roller bail 7 also increases. The speed detection bag'r! The frequency signal which is the output signal from 3 is converted into a voltage signal by a frequency voltage converter 9, and the peripheral speed setting device 1
Compare and amplify the winding speed signal input from 7 with the preset winding speed signal f(
Put it in s 11. When the speed detection voltage becomes larger than the set value, the comparator 11 outputs an output. This output signal is amplified by an intermediate unit 12A with automatic gain control, and the amplified output signal is sent to an integrator 14.
I have one friend. Integrator 14 (When Lj is input, it starts integration and inputs its output signal to the arithmetic amplifier 15 as a calculation input. Therefore, the output signal of the arithmetic amplifier 15 is smaller than the initial speed setting value. It enters the inverter 18 as a control signal.The inverter 18 converts the control input signal into control power and supplies it to the electric motor 6.Therefore, the rotational speed of the winding shaft 5 decreases by the amount that the control signal decreases, and the winding speed decreases. The winding thickness is controlled so as to approach the set value. When the winding thickness further increases, the above control is repeated, and the yarn is wound without being controlled so as to always approach the set value. The operation in the main control path (b) is carried out as described above.The tension fluctuation of the yarn at this time is as shown in Figure 3, and the fluctuation with respect to the oscillating tension value is large and does not last for one minute as the winding device. Therefore, the output of the arithmetic amplifier IO is amplified by an amplifier 12B with automatic gain control as a minor loose control circuit section that outputs an increased speed signal to the inverter 18 in proportion to the speed deviation. The signal is switched by the switch 13B and inputted to the arithmetic amplifier 15 to reduce the overshoot or undershoot caused by the response delay in the main control operation, and to adjust the tension fluctuation of the yarn as shown in Figure 4. The variation [1] with respect to the target tension value is reduced.Here, it is preferable that the switch 13B is switched within several minutes after yarn winding is started and the main control circuit is operated.

The control signal that is the output signal of the speed control device 8 includes the winding thickness component of the winding yarn, since the winding speed of the winding shaft, that is, the rotation speed of the electric motor changes as the winding thickness of the yarn increases. Since the control signal including this winding thickness component is supplied to the amplifiers 12A and 12B with automatic gain control provided in the speed control device, the control signal l11 increases as the winding thickness increases.
1 High precision winding even when gain changes and high speed winding B
Can be controlled.

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

The electric motor that drives the zero winding shaft may be directly connected as in the embodiment, or may be connected via a belt or the like.

(・The traversing device for winding the yarn may be a reciprocating guide, a grooved drum, or other structure.・The speed detection device for detecting the winding speed uses a photoelectric tube to detect the winding speed using a protrusion or the like provided on the roller bale. It may be of a detection configuration, and preferably one that can be detected in a non-contact manner.

By configuring the present invention as described above, the following effects can be achieved.

By providing an initial speed setting device for controlling the speed during zero thread winding and a peripheral speed setting device for controlling the speed during normal winding, the thread winding success rate can be increased.

- An arithmetic amplifier 10 is installed in the speed control device as a minor loop control circuit that outputs a sedimentation speed signal to the inverter in proportion to the speed deviation. By providing the automatic gain control unit 1 intensifier 12BE and switch 13B, overshoot and undershoot in the main control circuit due to response delay of the controlled object are reduced, and tension fluctuations in the yarn are reduced [2. Good winding is achieved. You can take the package and get it.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the relationship between the winding thickness of the yarn and the number of rotations of the winding shaft. FIG. 2 is a control system diagram showing one embodiment of the constant speed winding device of the present invention. FIG. 3 is a schematic diagram showing tension fluctuations in the yarn due to the main control operation of the speed control device in the constant speed winding device of the present invention. FIG. 4 is a schematic diagram showing tension fluctuations in the yarn when the main control operation of the speed control device in the constant speed winding device of the present invention is controlled by a minor loop control circuit. 3: Winding speed detection device 4: Winding machine 5: Winding shaft 8: Speed control device 9: Frequency weight 11° converter to, 15: Winding width increaser 411: Comparator
12A, 12B: Amplifier 13A with automatic gain control,
13B: 11. +1 changer 14: Integrator 16: Initial speed setting device 17: Peripheral speed setting device 18: Inverter output 1 person Toshi Engineering Co., Ltd. 1st w
J Port 4

Claims (1)

[Claims] ■) In a winding device that controls the rotational speed of the winding bobbin using a device that detects the winding speed of the yarn and a speed control device, the speed control device is connected to the initial speed setting device, the actual winding speed, and the winding tension. It has a circumferential speed setting device that determines the winding speed, and only when the detected speed is higher than the determined winding speed, the Ii1 rotation speed of the winding bobbin is gradually decreased, and in other cases, the rotation speed of the winding bobbin is increased. 1. A constant speed winding device comprising: a control circuit that maintains a constant value; and a minor loop Z° control circuit that reduces fluctuations in yarn tension during winding.