JPS6246655B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a method of driving a draw false twister.

(Prior art and its problems) In recent years, undrawn yarn or semi-drawn yarn has been subjected to sublimation processing using a drawing false twisting machine that can perform drawing and false twisting operations simultaneously, and the processing speed has been increased. Therefore, the threading operation is performed at a low speed, and then the speed is increased to the processing speed. The driving method for the drawing false twisting machine is to control each electric motor that drives the false twisting device, the drawing roller, and the roller of the winding device by an independent speed setting control device, and also to control the overall speed. It is possible to change the rotational speed of the electric motor at a constant rate with respect to the standard rotational speed, and a speed detector is installed on the stretching roller for feedback control.

A method of controlling the above-mentioned stretching false twisting machine is described in, for example, Japanese Patent Laid-Open No. 150130/1983.

In the above-described driving method, no consideration is given to changing the machining conditions. Therefore, when changing the machining conditions, first stop each electric motor and change the machining conditions, then start the electric motors and perform the threading operation at a low speed, and then return to the specified speed. It is speeding up and performing sublime processing. Therefore, each time the machining conditions are changed, each electric motor is stopped once and the machining conditions are changed, and then each electric motor is started and brought up to a low speed range. When the set rotation speed is reached, the second The yarn is run by the yarn feed roller, then the false twisting device is activated to give the yarn a twist, and in this state it is brought into contact with the heating surface of the heating device, and finally the yarn is twisted by the first yarn feed roller. A threading operation for stretching must be performed, and waste thread is generated every time the threading operation is performed. Furthermore, if the timing of the above-mentioned operation is not correct, thread breakage occurs and the threading operation has to be repeated, and the amount of waste thread is increased.

(Object of the Invention) The present invention was achieved as a result of studies aimed at solving the above-mentioned problems and making it possible to change processing conditions during operation.

(Means for Solving the Problems) That is, the present invention provides a drawing false twisting machine comprising a first yarn feeding roller, a yarn heating device, a false twisting device, a second yarn feeding roller, and a winding device. ,
the first yarn feeding roller, the false twisting device, and the second
Either the thread feed rollers are driven by independent motors, or two of them are driven by a single motor, and each motor is set to the following settings: (a) Second thread feed High speed value and low speed value of roller circumferential speed value (b) Ratio of second yarn feed roller circumferential speed to first yarn feed roller circumferential speed, and/or ratio of second yarn feed roller circumferential speed to false twisting device circumferential speed The following operation commands are inputted to the speed command device in sequence.
In other words, (c) a rise command, (d) a speed increase command, (e) a deceleration command, and (f) a stop command are given, and the drive is controlled via the speed conversion device, and the set value input to the speed command device is The change is made during low-speed operation or high-speed operation, and then a speed increase command signal or deceleration command signal is given to drive the motor based on the changed setting value when the high-speed operation range or low-speed operation range is reached, respectively. The present invention provides a method for driving a drawing false twisting machine.

(Example) The configuration of a drawing false twister and the configuration of a speed control device for carrying out the driving method of the present invention will be described based on the drawings.

1 is a yarn feeding package for undrawn yarn or semi-drawn yarn. 2 is a first yarn feeding roller, which is driven by an induction motor 23a.
3 is a heating device, and 4 is a cooling device. 5 is a false twisting device, in which a belt 7 is stretched around a pulley 6;
It is designed to be driven by Reference numeral 8 denotes a second yarn feeding roller, which is driven by an induction motor 23c. Reference numeral 9 denotes a winding device, which is rotated by the above-mentioned induction motor 23c via gears. 10 is a traverse device, and a traverse guide is driven by an induction motor 23d.

The outline of the control section of each electric motor is as shown in FIG. 2, and in the figure, 11 is a speed command device. Reference numeral 12 denotes a control panel, which includes a push button switch 13, a selection switch for the top setting, and a keyboard 1 for inputting numerical values.
4 is provided.

The details of the speed command device 11 mentioned above are as shown in FIG. Reference numeral 16 denotes an input interface that converts the operating signals of the setting item selection switch and the numerical input keyboard 14 into electrical signals and sends them to the arithmetic unit 17. The arithmetic unit 17 has a comparison circuit, and is configured to calculate output values corresponding to each driving command signal based on the electrical signals sent from the input interfaces 15 and 16. The calculated output value is then stored in the storage device 18. Reference numeral 19 denotes an output interface, which converts the electric signal output from the arithmetic unit 17 into a digital signal and sends it to the digital-to-analog converters 21a to 21d. Reference numeral 20 denotes a man-machine interface, in which when the numerical value inputted by the setting item selection switch and numerical input keyboard 14 deviates from the upper limit value or the lower limit value, a comparison circuit of the calculating unit 17 performs a comparison operation. An indicator lamp (not shown) on the operation panel 12 is turned on based on the output electric signal.

The above-mentioned push button switch 13 includes a first start push button switch 13a for a rise command, a second start push button switch 13b for an increase command, a first stop push button switch 13c for a deceleration command, and a first stop push button switch 13c for a stop command. There are five types: a second stop push button switch 13d for emergency stop commands, and an emergency stop push button switch 13e for emergency stop commands. Moreover, the digital-to-analog converter 21a~
21d converts the digital signal from the output interface 19 into an analog signal and sends it to the inverter devices 22a to 22d. Induction motors 23a to 23d are inverter devices 22a to 2
It is designed to be rotated based on the output signal of 2d. 24a to 24d are induction motors 23a to 2
This is a pulse generator that detects the rotational speed of 3d, and feeds back to the inverter device 22a to 22d.

The driving operation in the above-mentioned stretch false twisting machine will be explained.

First, operate the setting item select switch on the control panel 12 and the numerical input keyboard 14 to select the second
Input the processing speed (high speed) and thread threading (low speed) operating speed of the thread feed roller 8, and
Stretching ratio (D/R ratio) which is the peripheral speed ratio of the second yarn feeding roller 8 and the first yarn feeding roller 2, the second yarn feeding roller 8 and the false twisting device 5 at high speed and at low speed
When inputting the circumferential speed ratio (D/Y ratio), rise, speed increase, and deceleration times, and the speed of the traverse device 10, the input interface 16 inputs them as electric signals to the calculator 17, and the rise The speed changes during speed increase, speed increase, and deceleration are calculated as speed gradients divided into increments of fixed time intervals, and are stored in the storage device 18 as output values corresponding to each driving command signal. Next, based on the speed of the winding device 9, the gear ratio of the speed change gear provided between the yarn feed roller 8 and the second yarn feed roller 8 is selected, and a predetermined gear is mounted.

Once these preparations are complete, press the first start push button switch 13a on the operation panel 12 to activate it.
It is converted into an electric signal by the input interface 15 of the speed command device 11 and inputted to the arithmetic unit 17, and an output value corresponding to the rising command signal is selected from the storage device 18 and taken out as an electric signal and sent to the output interface 19. Output. Then, the signal is transferred to the digital-to-analog converter 21
Inverter devices 22a to 22d via a to 21d
The induction motors 23a to 23d are started. The state of the speed change at this time is as shown in FIG. It is rotated at the operating speed when threading. In this state, the yarn is threaded at a predetermined location. Then, when the threading operation is completed and the second start push button switch 13b is pressed to activate, the output value corresponding to the speed increase command signal is selected and output from the storage device 18, and the output value is selected based on the speed gradient calculated in advance. It is rotated at the increased operating speed during machining. Then, the undrawn yarn pulled out from the yarn feeding package 1 is transferred to the first yarn feeding roller 2.
The yarn is stretched between the second yarn feeding roller 8 and the second yarn feeding roller 8, and is false twisted by the false twisting device 5 to become a sublimely textured yarn, which is wound up by the winding device 9 while being traversed by the traverse device 10. Then, when a preset amount of sublime processed yarn is wound up and the first stop push button switch 13c is pressed to activate, the wound yarn is transferred to the waist device provided in the winding device 9. At the same time, an output value corresponding to the deceleration command signal is selected from the storage device 18 and outputted, and the yarn is decelerated based on a pre-calculated speed gradient and rotated at the operating speed during threading. In this state, convert between a full bobbin and an empty bobbin, and then press the second start push button switch 13b.
When pressed to activate, the output value corresponding to the speed increase command signal is selected and output from the storage device 18, and the speed is increased based on a pre-calculated speed gradient to rotate at the operating speed during machining. Then, when the drawing false twisting operation is started at the operating speed during processing, the yarn being wound by the waist device is transferred to an empty bobbin, and the sublime processed yarn is wound.

When the preset sublime processing is completed and the drawing false twisting machine is stopped, the operating speed during processing is once decelerated to the operating speed during threading. Then, when the second stop push button switch 13d is pressed to activate, the output value corresponding to the stop command signal is selected and output from the storage device 18, and the speed is decelerated based on the calculated speed gradient. The rotation of the yarn feed roller 2, the second yarn feed roller 8, the false twisting device 5, the traverse device 10, and the winding device 9 is stopped.

If a trouble occurs during the above-mentioned stretch false twisting process, press the emergency stop push button switch 13e to activate the speed command voltage corresponding to the emergency stop command signal from the storage device 18.
a to 22d, and the induction motors 23a to 23d are immediately stopped.

Next, in the middle of the operation, the operating speed during yarn threading and processing, the drawing ratio (D/R ratio), the peripheral speed ratio (D/R ratio) of the second yarn feeding roller and the false twisting device at high speed and low speed are determined. The driving operation when changing set values such as Y ratio) will be explained.

First, if you want to change the set value at the operating speed when threading, operate the select switch for setting items on the operation panel 12 and the keyboard 14 for inputting numerical values to input the set value, and then change the following items to each speed. It is stored in the storage device 18 of the command device 11.

(a) Operating speed during processing (b) Stretching ratio during processing (D/R ratio) (c) Peripheral speed ratio of the second yarn feed roller and false twisting device during processing (D/Y ratio) Next , when the second start push button switch 13b is pressed to activate, the output value corresponding to the speed increase command signal is selected from the storage device 18 of the speed command device 11 and taken out as an electrical signal via the calculator 17 to control the speed. Inverter device 22a as command voltage
~22d. Then, even when the speed changes as shown in FIG. 5, the induction motors 23a to 23d are accelerated at a predetermined speed gradient, so that the first yarn feeding roller 2, the second yarn feeding roller 8, the false twisting device 5, and the traverse The device 10 and the winding device 9 are rotated at the changed working speed when the high speed is reached. In this state, when the undrawn yarn is stretched and false-twisted to become a sublimely textured yarn and wound up by a preset amount, the first stop push button switch 13c is pressed to put it into operation. Then, it is decelerated with a speed gradient corresponding to the deceleration command signal and rotated at the changed operating speed when threading. When carrying out drawing and false twisting subsequently, after replacing the bobbin, the second start push button switch 13b is pressed to activate it and rotate it at the operating speed during processing. In addition, when stopping the threading operation from the operating state, the second stop push button switch 13d is pressed to activate the operating state, decelerate, and then stop.

Select switch for setting items and keyboard 1 for inputting numerical values in the above-mentioned setting value changing operation
If you press 4 by mistake and enter a value that exceeds the upper or lower limit of the set value, the comparator circuit of the arithmetic circuit 17 performs a comparison calculation, and an electrical signal is sent to the man-machine interface 20 and displayed on the operation panel 12. A lamp (not shown) is lit to notify you of an input error. Setting values outside the upper and lower limits are stored in storage device 1.
It will not be sent to 8.

Setting values can be changed, deleted, etc. even when the machine is stopped or at the operating speed during machining.

Although the present invention can be carried out as described above, the drive by the electric motor can be carried out as shown in FIG.
The yarn feeding roller and the false twisting device can be driven by one electric motor, or the first yarn feeding roller and the second yarn feeding roller can be driven by one electric motor as shown in FIG. Furthermore, it goes without saying that the winding device can be driven by a single electric motor.

In changing the setting values mentioned above, only the setting values for low speed and high speed operation were input for the peripheral speed ratio of the second yarn feed roller and the peripheral speed of the false twisting device, but the settings for low speed and high speed operation of only the draw ratio Not only can a set value be input, but also both set values can be input at the same time. Further, the ratio of at least one of the ratio between the second yarn feeding roller circumferential speed and the first yarn feeding roller circumferential speed, and the ratio between the second yarn feeding roller circumferential speed and the false twisting device circumferential speed at low speed and high speed operation. is input, the operation is performed based on the set values during low-speed and high-speed operation, and the operation is performed using a calculator so that the ratio is gradually changed during the transition from low speed to high speed or from high speed to low speed. It is also possible to calculate the output value of the command signal and store it in a storage device.

(Effects of the Invention) The present invention provides a drawing false twisting machine comprising a first yarn feeding roller, a yarn heating device, a false twisting device, a second yarn feeding roller, and a winding device as described above. The first yarn feed roller, the false twisting device, and the second yarn feed roller are each driven by independent electric motors, or two of these are driven by one electric motor, and each electric motor is driven by one electric motor. The following setting values, i.e. (a) high speed value and low speed value of the second yarn feed roller circumferential speed value (b) ratio of the second yarn feed roller circumferential speed to the first yarn feed roller circumferential speed, and/or the second yarn feed roller circumferential speed value The following operation commands are sequentially sent to the speed command device into which the ratio of the peripheral speed of the feed roller and the peripheral speed of the false twisting device is input.
Namely.

(c) Increase command, (d) Speed increase command, (e) Deceleration command, (F) Stop command, drive control via the speed conversion device, and change the set value input to the speed command device. The change should be made during low-speed operation or high-speed operation, and then applied to the speed increase command signal or deceleration command signal to drive based on the changed setting value when the high speed operation range or low speed operation range is reached, respectively. The following effects can be achieved.

(1) Since processing conditions can be changed while the machine is in operation, there is no need for threading operations each time processing conditions are changed, as is the case in the past, and it is possible to prevent the generation of waste yarn associated with threading operations. Furthermore, since the machining conditions can be changed during operation, searching for optimal machining conditions can be easily performed.

2 Among the set values, the second yarn feed roller circumferential speed value and the first
For at least one of the ratio of the circumferential speed of the yarn feeding roller and the ratio of the circumferential speed of the second yarn feeding roller to the circumferential speed of the false twisting device, enter the ratio during low speed operation and the ratio during high speed operation, and the ratio is A calculator calculates the output value of the operation command signal to drive each motor so that it changes gradually during the transition from low speed to high speed or from high speed to low speed, so even if machining conditions are changed, the speed increase range The speed change in can be set to an optimum value, and even if the threading operation is performed in a high speed range and then the speed is increased to a high speed range, no thread breakage will occur during the speed increase process.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing one embodiment of a drawing false twisting machine for carrying out the driving method of the present invention. FIG. 2 is a schematic diagram showing the drive control section in FIG. 1. FIG. 3 is a schematic diagram showing details of the speed command device in FIG. 2. FIGS. 4 and 5 are diagrams showing the state of speed change based on the driving command signal.
FIGS. 6 and 7 are schematic diagrams showing other embodiments of the drive control section. 2: first yarn feeding roller, 3: heating device, 5: false twisting device, 8: second yarn feeding roller, 9: winding device, 10: traverse device, 11: speed command device, 12: operation panel, 15, 16: Input interface, 17: Arithmetic unit, 18: Storage device, 1
9: Output interface, 21a-21d: Digital analog converter, 22a-22d: Inverter device, 23a-23d: Induction motor.

Claims (1)

[Scope of Claims] 1. A drawing false twisting machine comprising a first yarn feeding roller, a yarn heating device, a false twisting device, a second yarn feeding roller, and a winding device, wherein the first yarn feeding roller, Either drive the false twisting device and the second yarn feed roller by independent motors, or drive two of them by one motor, and enter the following setting values for each motor. The following operation command signals are sequentially given to the speed command device, and the drive is controlled via the speed conversion device.The set value input to the speed command device is changed during low-speed operation or high-speed operation, and is then increased. speed command signal,
Or, a method for driving a drawing false-twisting machine, characterized in that a deceleration command signal is applied and the machine is driven based on the changed setting values when the high-speed operation range or the low-speed operation range is respectively reached. Setting value (a) High speed value and low speed value of the second yarn feed roller circumferential speed. (b) The ratio of the circumferential speed of the second yarn feed roller to the circumferential speed of the first yarn feed roller, and/or the ratio of the circumferential speed of the second yarn feed roller to the circumferential speed of the false twisting device. Operation command signal (c) Rising command signal from stop to low speed. (d) Speed increase command signal from low speed to high speed. (e) Deceleration command signal from high speed to low speed. (f) Stop command signal from low speed to stop. 2 Among the set values input to the speed command device, at least the ratio of the second yarn feeding roller circumferential speed to the first yarn feeding roller circumferential speed, and the ratio of the second yarn feeding roller circumferential speed to the false twisting device circumferential speed. One of the ratios is entered for low speed operation and high speed operation, and during low speed and high speed operation, operation is based on the respective set values, and the ratio changes from low speed to high speed or from high speed to low speed. In the first aspect of the invention, the output value of the driving command signal is calculated by a computing unit so as to drive each electric motor by gradually changing the output value of the driving command signal, and the output value is stored in a storage device. How to drive a twisting machine.