JPH10130970A - Apparatus for detecting abnormality of amount of oiling agent impregnated into yarn and end breakage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To send warning signals and stop a frame by quantitatively measure an amount of oiling agent impregnated into yarn and detecting abnormality of the oil impregnated amount deviated from a specified value and also yarn end breakage. SOLUTION: This apparatus is equipped with an oscillation part 5 composed of an oscillation electrode 6 arranged in correspondence to a traveling passage of a yarn 1 in which oiling agent is impregnated and alternating current oscillator 7 for applying alternating voltage to the oscillation electrode 6 and a detecting part 8 composed of a pair of received electrodes 9a and 9b, a differential amplifier 10, a waveform shaper 14, a voltmeter 15, a compactor 16 and relay circuit 17, and abnormality of the oil impregnated amount and yarn end breakage are detected by the detection part 8 and the relay circuit 17 is operated by output of the compactor 16 to inform abnormality of the amount of oil agent impregnated into yarn 1 and yarn end breakage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for electronically detecting an abnormality in the impregnation amount of an oil agent impregnated in a running yarn and a broken yarn in a textile machine or the like.

[0002]

2. Description of the Related Art Yarns produced or processed by a textile machine or the like, if an unexpected yarn breakage occurs in those processes, causes serious troubles in the process and damages a machine base. May result in personal injury. In response to this, measures have been taken to reduce the yarn breakage rate by impregnating the yarn with an appropriate amount of oil, and to install a yarn breakage detector on the running yarn of the machine and issue an alarm when the yarn breaks. ing. The oil is generally used by dissolving a few percent of emulsified oils and fats in water. The yarn is impregnated with the oil by a method such as spraying the yarn onto the yarn or applying the oil via a roller or the like. Thus, in order to make the impregnation amount of the oil agent an appropriate amount, in the sprayer, the flow rate is controlled to be constant,
In the roller type coating method, a method of controlling the number of rotations of a roller is used. Conventionally, as a means for detecting a yarn break, a method of detecting the presence or absence of running of a yarn by a photoelectric type or an electrostatic type or a method of detecting a change in the tension of the yarn by a microswitch or a piezoelectric element has been adopted. .

[0003]

In the means for impregnating the yarn with the oil agent in the prior art, the impregnation amount fluctuates due to nozzle clogging of the sprayer, troubles such as fluctuations in the jet pressure, and uneven roller application. Furthermore, the impregnation amount of the oil agent may be out of the specified range due to factors such as the oil agent being scattered in the air during the process.Therefore, a method of constantly inspecting each machine manually has been adopted. Effect has not been obtained. Further, a method of measuring the resistance value of the yarn to detect the oil impregnation amount has been considered, but it has not yet been put to practical use. Also, in the conventional thread break detector, the photoelectric type is hardly popular because the oily agent contaminates the photocathode and the electrostatic type has a problem that the oily agent conducts static electricity and does not generate a detection potential. . The reason why the impregnation amount of the oil agent cannot maintain the predetermined value is mainly due to malfunction of the oil agent impregnating device, so that maintenance and inspection of the oil agent impregnation device are monitored manually or mechanically at present. There was a problem, however, in that it was necessary to respond after the trouble occurred.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to quantitatively measure the amount of oil impregnated in a yarn, and to determine the amount of the impregnated yarn with respect to the specified amount. It is an object of the present invention to provide a device that detects an abnormality of the oil impregnation amount deviating from the value and a thread break, and performs an alarm and a stop of the machine base.

Another object of the present invention is to be able to cope with a wide range of yarn speeds and yarn types, not to be affected by the use environment, and to be easy to install and handle without hindering the running of the yarn. It is an object of the present invention to provide a device for detecting abnormalities in oil impregnation amount of yarn and yarn breakage which can be manufactured at low cost.

[0006]

In order to achieve these objects, the present invention provides an oscillating section for applying an AC potential to a traveling yarn impregnated with an oil agent, and an oscillating section for detecting abnormalities in the oil impregnation amount of the yarn and yarn breakage. A detecting unit for detecting and stopping an alarm and a machine based on the output signal thereof, wherein the oscillating unit is arranged corresponding to the running direction of the yarn impregnated with the oil agent, and the surface of the conductor is An oscillation electrode covered with a wear-resistant insulator;
An AC oscillator that applies an AC voltage to the oscillation electrode, wherein the detection unit is disposed at a fixed interval behind the oscillation electrode, and the surface of the conductor is covered with a wear-resistant insulator. A pair of receiving electrodes, each of which is connected to the pair of receiving electrodes, and a differential amplifier that differentially amplifies the potentials of the pair of receiving electrodes, and is connected to an output of the differential amplifier, and amplifies the output signal. And a waveform shaper for rectifying, a voltmeter connected to the output of the waveform shaper and measuring the output signal, and a comparator for comparing the output signal with a variably set potential to output a signal; A relay circuit connected to the comparator and operated by the output signal is provided, and the operation of the relay circuit notifies an abnormality of the oil impregnation amount of the yarn and the breakage of the yarn.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings and the operation thereof. FIG. 1 is an electric configuration diagram of an example of the device according to the present invention, and FIG. 2 is an equivalent electric circuit diagram for explaining the gist of the operation of the present invention.
It is assumed that the yarn 1 is wound on the winding yarn 4 from the yarn supply 2 via the roller 3, for example, and travels in the direction of the solid arrow A. The apparatus for detecting the abnormality of the oil impregnation amount impregnated in the running yarn 1 and the breakage of the yarn includes an oscillating unit for applying an AC potential to the traveling yarn 1, an abnormality of the oil impregnation amount of the yarn 1 A detection unit for detecting a yarn breakage and performing an alarm and a stop of the machine base based on the output signal.

The oscillating portion 5 is arranged on the running path of the yarn 1 and has an electroconductive surface whose surface is covered with a wear-resistant insulator such as a ceramic pipe. And an AC oscillator 7 for applying a voltage.

The detecting section 8 is arranged at a constant interval with respect to the running path of the yarn 1 located behind the oscillation electrode 6, and the surface of the conductor is covered with a wear-resistant insulator such as a ceramic pipe. A pair of receiving electrodes 9a and 9b, and a pair of receiving electrodes 9;
a, 9b, respectively, and a pair of receiving electrodes 9a, 9
and a differential amplifier 10 for differentially amplifying the potential b.
The differential amplifier 10 includes an equalizer 11 and an operational amplifier 12 that outputs an AC signal after being amplified by a feedback circuit 13. The input terminal thereof is connected to the inputs of the equalizer 11 and the operational amplifier 12, and It is grounded via two high-resistance resistors R ₁ and R ₂ and balanced resistors Ra and Rb (see FIG. 2), and the ground point G is connected to the ground terminal of the oscillation unit 5. The detection unit 8 is connected to an output of the differential amplifier 10 and connected to an output of the waveform shaper 14 for amplifying and rectifying the output signal,
A voltmeter 15 for measuring the output signal, a comparator 16 for comparing the variably set reference value with the output voltage of the waveform shaper 14 and outputting the same, and connected to the comparator 16 and It includes a relay circuit 17 which operates and outputs an alarm and sends out a machine stop signal. Waveform shaper 14
Is constituted by a filter for filtering an AC frequency and a rectifier. The output of the differential amplifier 10 is shaped into a DC by the waveform shaper 14, and the DC voltage is measured by a voltmeter 15.

Next, the operation will be described. In the above configuration, the AC voltage of the AC oscillator 7 is transmitted to the yarn 1 mounted on the oscillation electrode 6 and transmitted to the pair of reception electrodes 9a and 9b. The frequency of the AC oscillator 7 is suitably several hundreds to several kilohertz, and its voltage is several volts. Since the receiving electrodes 9a and 9b are grounded by the balancer 11 having a high input resistance value, the output of the AC oscillator 7 is applied to the oscillation electrode 6, the thread 1, the reception electrodes 9a and 9b, and the closed circuit of the balancer 11. . Therefore, this state is represented by the equivalent circuit of FIG. That is, in FIG. 2, the voltage of the AC oscillator 7 is E, the impedance of the oscillation electrode 6 and the thread 1 is Z ₀ , and the interelectrode resistance between the oscillation electrode 6 of the thread 1 and one receiving electrode 9a is R.
₀ , the current flowing through the resistor R ₀ is i ₀ , the resistance value of the receiving electrode of the thread 1 between the receiving electrode 9a and the receiving electrode 9b is ΔR, and the impedance between the receiving electrode 9a and the receiving electrode 9b and the thread 1 each Z _1, Z _2, the receiving electrode 9a is input resistance of balancer 11 connected to the 9b are respectively R _1, R _2, divided balanced resistors Ra, Rb, a resistor R _1, R ₂ The flowing current is i
It is displayed as _1, i _2.

Now, when the yarn 1 is not mounted on the oscillation electrode 6 and the pair of receiving electrodes 9a and 9b due to the yarn breakage phenomenon, a potential due to power induction is induced on the receiving electrodes 9a and 9b. However, these in-phase and synchronous potentials become the same potential by adjusting the balancing resistors Ra and Rb of the balancer 11, and the differential amplifier 10 does not output a signal.
Next, the yarn 1 impregnated with the oil agent is
a, 9b, when run on the receiving electrode 9a,
Assuming that the respective potentials of the input terminals of the operational amplifier 12 respectively connected to 9b are ea and eb, the equation ea = E−i ₀ (Z ₀ + R ₀ ) −i ₁ (R ₁ + Ra) (R ₁ +
Ra / Z ₁ + R ₁ + Ra) eb = E−i ₀ (Z ₀ + R ₀ ) −i ₂ ΔR−i ₂ (R ₂ + R
b) The potential represented by (R ₂ + Rb / Z ₂ + R ₂ + Rb) is applied, where (R ₁ + Ra) (R ₁ + Ra / Z ₁ + R ₁₎
+ Ra) and (R ₂ + Rb) (R ₂ + Rb / Z ₂ + R ₂ + R
Since b) is a constant with almost the same value, if this is a constant K, the input potential difference ea-eb of the operational amplifier 12 is expressed by the following equation: ea-eb = i ₂ (△ R + K) -i ₁ K = K (i ₂ -i ₁₎
+ I ₂ ΔR Since the constant K in the above equation is set to a value sufficiently larger than the electrode resistance value ΔR, ea−ebｅi is set as i ₂ −i ₁ ≒ 0.
₂ ΔR. Thus, i ₂ is given by the following equation: i ₂ = E−R ₀ (i ₁ +
From the relational expression of i ₂ ) / △ R + K, i ₂ = E / △ R + K + 2R
₀ is omitted from the relational expression of ea−eb ≒ △ R · E / K as E / K. That is, the differential amplifier 10 amplifies and outputs a signal proportional to the oscillation voltage E and the resistance value ΔR between the receiving electrodes. If the oscillation voltage E is fixed, the resistance value between the receiving electrodes △
R, that is, a signal corresponding to the impregnation amount of the oil agent is detected based on the resistance value of the yarn 1. Incidentally, the oscillation electrode 6 and the reception electrode 9
The impedance of the insulation coatings a and 9b is about 100 kΩ at 1 kHz, and the resistance R _{1 of the} balancer 11 is 1 kHz.
For + Ra and R ₂ + Rb, about 10 megohms is a practical value.

The differential amplifier 10 is amplified by a feedback circuit 13 and its output signal is input to a waveform shaper 14.
As described above, the waveform shaper 14 includes, for example, a filter that filters the AC frequency of the AC oscillator 7 and a rectifier that rectifies the AC to DC. The noise component is removed, and a DC voltage proportional to the resistance value ΔR between the receiving electrodes, that is, the specific resistance of the yarn 1 is output. The output DC voltage value is indicated by a voltmeter 15
The specific resistance of the yarn 1, that is, the relative value of the oil impregnation amount of the yarn 1 is visually measured. On the other hand, the output DC voltage of the waveform shaper 14 is applied to a comparator 16 which is compared with a variably set reference voltage, and the upper and lower limits of this reference voltage are calibrated in accordance with the oil impregnation amount of the yarn. The signal is output from the comparator 16 when the value deviates from the specified value.
In the case of a yarn break, since the yarn 1 does not exist on the receiving electrodes 9a and 9b, the output signal from the comparator 16 is naturally applied to the relay circuit 17 also in this case. The relay circuit 17
It is configured by an open collector circuit of a transistor or an electromagnetic relay, and operates according to an output signal from the comparator 16 to output its switching contact. Although not shown, the contact output of the relay circuit 17 is interlocked with an alarm device and a machine switch, thereby notifying the abnormality of the oil impregnation amount of the yarn 1 and stopping the machine operation.

The detecting device according to the present invention can be modified. For example, the oscillating unit 5 may be integrally formed with the detecting unit 8. 6
May be arranged to correspond to the common oscillating unit 5 connected to the common AC oscillator 7.

Further, for a pair of receiving electrodes 9a and 9b,
The yarn 1 is connected to one of the receiving electrodes 9a (or the receiving electrode 9).
b), the inter-electrode resistance R ₀ between the oscillation electrode 6 and the reception electrode 9a (or the reception electrode 9b).
The object of the present invention can be achieved even in a state where the value of is measured.
Although the voltmeter 15 is not shown, it is connected to a recorder,
It is also possible to measure the change over time, and it is also possible to control a large number of the detection units 8 by setting the reference voltage of the comparator 16 collectively and in parallel.

[0015]

According to the present invention, first, the oscillation power source is an AC signal, and the contact impedance between the oscillation electrode and the receiving electrode and the yarn can be lower than the measured specific resistance of the yarn. The oil impregnation amount of the yarn can be accurately measured electrically, and it can be manufactured with a simple and robust structure, and the manufacturing cost is low. It is possible to detect inappropriate (abnormal) oil thread impregnation amount of the yarn and breakage of the yarn, so that damage to the machine can be prevented and the quality of the yarn can be controlled.

Further, according to the present invention, the number of personnel for maintenance and management of a machine stand and the like can be greatly reduced, so that economic efficiency, labor saving, factory safety, quality improvement, rationalization in a yarn production process, and the like are greatly improved. Has an effect.

[Brief description of the drawings]

FIG. 1 is an electrical configuration diagram of an example of a detection device according to the present invention.

FIG. 2 is an equivalent electric circuit diagram for explaining the gist of the operation of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Yarn 2 Yarn supply 3 Roller 4 Winding thread 5 Oscillator 6 Oscillating electrode 7 AC oscillator 8 Detector 9a, 9b A pair of receiving electrodes 10 Differential amplifier 14 Waveform shaper 15 Voltmeter 16 Comparator 17 Relay circuit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI D05B 71/00 D05B 71/00 // D05B 51/00 51/00

Claims (3)

[Claims] An oscillator for applying an AC potential to a running yarn impregnated with an oil agent, an abnormality in the oil impregnation amount of the yarn and breakage of the yarn are detected, and an alarm and stop of the machine are performed based on an output signal thereof. A oscillating electrode, wherein the oscillating unit is disposed corresponding to the running direction of the yarn impregnated with the oil agent, and the surface of the conductor is covered with a wear-resistant insulator. An AC oscillator that applies an AC voltage to the oscillation electrode, wherein the detection unit is arranged at a fixed interval behind the oscillation electrode, and the surface of the conductor is covered with a wear-resistant insulator. A pair of receiving electrodes, each connected to the pair of receiving electrodes, and a differential amplifier for differentially amplifying the potential of the pair of receiving electrodes, connected to an output of the differential amplifier, and amplifying and amplifying the output signal. A rectifying waveform shaper, connected to an output of the waveform shaper, And a voltmeter for measuring the output signal, a comparator for comparing the output signal with a variably set potential and outputting a signal, and a relay circuit connected to the comparator and operating with the output signal. An abnormality in the oil impregnation amount of the yarn and a yarn breakage detecting device, wherein the abnormality of the oil impregnation amount of the yarn and the breakage of the yarn are notified by the operation of the relay circuit. 2. The apparatus according to claim 1, wherein the oscillating section and the detecting section are integrally formed. 3. The abnormality and yarn breakage detecting device according to claim 1, wherein said oscillating portion is provided which acts in common with a plurality of arrangements of said detecting portion.