JPS5914465Y2 - Thread breakage detection device - Google Patents
Thread breakage detection deviceInfo
- Publication number
- JPS5914465Y2 JPS5914465Y2 JP11944082U JP11944082U JPS5914465Y2 JP S5914465 Y2 JPS5914465 Y2 JP S5914465Y2 JP 11944082 U JP11944082 U JP 11944082U JP 11944082 U JP11944082 U JP 11944082U JP S5914465 Y2 JPS5914465 Y2 JP S5914465Y2
- Authority
- JP
- Japan
- Prior art keywords
- output
- circuit
- thread
- frequency
- running
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
Description
【考案の詳細な説明】
本考案は紡績工場における糸巻機の特に糸切れ検出装置
の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a thread breakage detection device for a thread winding machine in a spinning factory.
従来、紡績工場において多数の糸の巻取り、巻もどし装
置が使用され、その工程の途中においてしばしば糸切れ
が発生する。Conventionally, a large number of yarn winding and unwinding devices are used in a spinning factory, and yarn breakage often occurs during the process.
この糸切れは速かに検知して適切な処置を行なう必要が
あり、このためにカム機構又は電気接点を利用した多数
の糸切れ検出器が使用されている。It is necessary to quickly detect this thread breakage and take appropriate measures, and for this purpose a number of thread breakage detectors are used that utilize cam mechanisms or electrical contacts.
しかしいずれも機械的な動作のため故障が発生し易く、
高速度の動作には適さない、又、確実な動作を行なうた
めには比較的大きな張力を事前に附与する必要がある等
の問題点があった。However, both are mechanically operated and are prone to breakdowns.
There are problems such as it is not suitable for high-speed operation, and it is necessary to apply a relatively large tension in advance to ensure reliable operation.
このために走行する糸の振動、あるいはその位置を充電
素子、圧電素子又は可動コイル等の各検出素子で検出す
る方法も開発されたが上記電子的な検出方法は検出感度
が高く、シかも、浮遊する糸の毛、機械的振動等の雑音
又は検軟に不必要な外部信号で作動する等の不具合があ
り、この不具合を防止するための対策として各検出素子
を弾性体で支持する等の対策が施されているが、この対
策によっても誤動作を有効に防止することができないと
いう欠点があった。For this purpose, a method has been developed in which the vibration of the running thread or its position is detected using various detection elements such as charging elements, piezoelectric elements, or moving coils, but the electronic detection methods described above have high detection sensitivity and may be There are problems such as floating thread hairs, noise such as mechanical vibrations, or operation due to external signals unnecessary for soft inspection.To prevent these problems, measures such as supporting each detection element with an elastic body are taken. Although countermeasures have been taken, there is a drawback in that even these countermeasures cannot effectively prevent malfunctions.
本考案の目的は糸の走行時に発生する振動と、機械的に
誘起される外部振動とを有効に弁別して、誤動作のない
状態で糸切れを検出することができる糸切れ検出装置を
提供することによって、前記従来の欠点を除去すること
にある。An object of the present invention is to provide a yarn breakage detection device that can effectively distinguish between vibrations generated during yarn travel and mechanically induced external vibrations, and detect yarn breakages without malfunction. The object of the present invention is to eliminate the above-mentioned conventional drawbacks.
以下、本考案による一実施例の構成を図面によって説明
する。Hereinafter, the configuration of an embodiment of the present invention will be explained with reference to the drawings.
第1図は本実施例の電気的ブロック図で、紡錘1より解
除される糸2は巻取機のボビン3に巻き取られるととも
に、走行中の糸2は検知片4に摺接して図示矢印の方向
に走行し、また該検知片4は圧電素子5に固着し、圧電
素子5の出力は周波数弁別回路6、に入力され、その出
力は電圧増幅回路7に入力されるとともに、同出力は整
流平滑回路8及び電圧弁別回路9を通り、その出力は出
力回路10に入力される。FIG. 1 is an electrical block diagram of this embodiment, in which the thread 2 released from the spindle 1 is wound onto the bobbin 3 of the winding machine, and the running thread 2 comes into sliding contact with the detection piece 4 and is detected by the arrow shown in the figure. The detection piece 4 is fixed to a piezoelectric element 5, and the output of the piezoelectric element 5 is input to a frequency discrimination circuit 6, and the output thereof is input to a voltage amplification circuit 7. It passes through a rectifying and smoothing circuit 8 and a voltage discrimination circuit 9, and its output is input to an output circuit 10.
次に、本実施例の作用を第2図の周波数弁別特性図及び
第3図の電気回路図に従って説明する。Next, the operation of this embodiment will be explained with reference to the frequency discrimination characteristic diagram in FIG. 2 and the electric circuit diagram in FIG. 3.
糸2がボビン3に巻き取られるに際し、検知片4を摺走
することにより発生する糸2の走行速度に対応した振動
は圧電素子5に加わり、該圧電素子5により機械振動に
対応した電気的振動数に変換される(以下単に信号電圧
と称す)。When the thread 2 is wound around the bobbin 3, vibrations corresponding to the running speed of the thread 2 generated by sliding on the detection piece 4 are applied to the piezoelectric element 5, and the piezoelectric element 5 generates an electrical signal corresponding to the mechanical vibration. It is converted into a frequency (hereinafter simply referred to as signal voltage).
上記信号電圧は第3図に示すR1−R6,C,、C2及
びOP増幅器IC,より構成されるバイパス、アクティ
ブフィルタ(シングルフィードバック型)の周波数弁別
回路6により周波数が弁別される、(該周波数弁別回路
6の特性を第2図に示す)そして、周波数の低域部が、
遮断された信号電圧の内、糸2の走行速度に対応した高
域部のみが出力され、同信号はOP増幅器IC2より成
る電圧増幅回路7により、一定振幅の信号電圧に変換さ
れる。The frequency of the above-mentioned signal voltage is discriminated by a frequency discrimination circuit 6 which is a bypass active filter (single feedback type) consisting of R1-R6, C, C2 and an OP amplifier IC shown in FIG. (The characteristics of the discrimination circuit 6 are shown in FIG. 2), and the low frequency range is
Of the cut off signal voltage, only the high frequency portion corresponding to the running speed of the yarn 2 is output, and this signal is converted into a signal voltage of constant amplitude by the voltage amplification circuit 7 comprising the OP amplifier IC2.
同一定振幅電圧はダイオードD□、コンデンサC5,抵
抗RIOによる整流平滑回路8により平均値信号電圧に
変換される。The constant amplitude voltage is converted into an average value signal voltage by a rectifying and smoothing circuit 8 including a diode D□, a capacitor C5, and a resistor RIO.
また、上記平均値信号電圧■Sはヒステリシス特性をも
つ電圧弁別回路9(電圧コンパレータ)の反転端子に入
力される一方、R0□、R12,R13及び■R1によ
り得られる基準電圧V。Further, the average value signal voltage ■S is input to the inverting terminal of the voltage discrimination circuit 9 (voltage comparator) having hysteresis characteristics, while the reference voltage V obtained by R0□, R12, R13 and ■R1.
と比較される。その結果■5〈■oの場合は糸の走行な
しく糸切れ)、又、V8〉■oの場合は糸の走行中と判
定され、走行なしのときはOP増幅器IC3の出力はH
レベルに、走行中の場合はLレベルになるとともに、上
記出力信号はツェナダイオードZD2を介して出力用の
トランジスタTr1のベースに入力されて該トランジス
タTr1の導通又は開放を行ない、コレクターに接続さ
れるプルアップ抵抗R15を介して出力され、同出力信
号は停止装置への入力信号又はリレーを介して他の駆動
用に使用される。compared to As a result, if the result is ■5〈■o, the yarn is not running and the yarn is broken), and if V8〉■o, it is determined that the yarn is running, and when there is no running, the output of the OP amplifier IC3 is H.
level, and becomes L level when running, and the above output signal is input to the base of the output transistor Tr1 via the Zener diode ZD2, conducts or opens the transistor Tr1, and is connected to the collector. It is output via a pull-up resistor R15, and the output signal is used as an input signal to a stop device or for other driving purposes via a relay.
又、上記の一実施例では周波数弁別回路6としてバイパ
ス、アクティブフィルタ回路を使用したが、バンドパス
、又は、バンドエリミネーション型の周波数弁別回路6
を使用することもでき、又、磁歪型のメカニ力フィルタ
を複数個使用し、糸切れ直前の振動数の変化を取り出し
、糸切れ前に機械にその防止指令を行なうことも可能で
ある。Further, in the above embodiment, a bypass, active filter circuit is used as the frequency discrimination circuit 6, but a bandpass or band elimination type frequency discrimination circuit 6 may be used.
It is also possible to use a plurality of magnetostrictive mechanical force filters to extract the change in vibration frequency immediately before yarn breakage, and to issue a prevention command to the machine before yarn breakage.
上述するように、糸2の走行速度とそれにより生ずる振
動数は比例関係にあるため、周波数弁別回路6の遮断周
波数を糸2の走行により生じる周波数と一致させれば、
糸2の走行開始時の周波数変動の影響を受けず、又、機
械装置より発生する振動周波数にも影響されることなく
安定した状態で糸切れを検出することができる効果があ
る。As mentioned above, since the running speed of the yarn 2 and the vibration frequency generated thereby are in a proportional relationship, if the cutoff frequency of the frequency discrimination circuit 6 is made to match the frequency generated by the running of the yarn 2,
There is an effect that thread breakage can be detected in a stable state without being affected by frequency fluctuations when the thread 2 starts running, and also without being affected by vibration frequencies generated by mechanical devices.
又、遮断周波数は単に周波数弁別回路6の回路定数を変
更すれば足り、かつ連続的に周波数が変化できるために
糸2の番手又は走行速度が変更された場合も簡単に対応
することができる効果がある(なお周波数弁別回路に通
過帯域幅を持たせれば無調整で上記効果を得ることもで
きる。In addition, the cutoff frequency can be changed by simply changing the circuit constants of the frequency discrimination circuit 6, and since the frequency can be changed continuously, it is possible to easily cope with changes in the yarn count or running speed of the yarn 2. (However, if the frequency discrimination circuit has a passband width, the above effect can be obtained without adjustment.
)。次に、本考案の効果について説明する。). Next, the effects of the present invention will be explained.
本考案は糸の直線走行部分と接触して糸の走行速度に対
応した周波数の出力を発生させる圧電素子と、該圧電素
子からの糸の正常走行時の特定周波数の出力のみを通過
させる周波数弁別回路と、該周波数弁別回路からの出力
を増幅する増幅回路と、該増幅回路からの出力を整流後
平滑する整流平滑回路と、該整流平滑回路からの出力が
糸の正常走行に対応して予め設定した基準電圧と比較し
て出力を発生させる電圧弁別回路と、該電圧弁別回路か
らの出力によって作動する出力回路とのそれぞれを備え
た糸切れ検出装置にある。The present invention consists of a piezoelectric element that comes into contact with the linear running part of the thread and generates an output at a frequency corresponding to the running speed of the thread, and a frequency discrimination system that allows only the output of a specific frequency from the piezoelectric element to pass when the thread is running normally. an amplifier circuit that amplifies the output from the frequency discrimination circuit; a rectifier and smoothing circuit that rectifies and smoothes the output from the amplifier circuit; The yarn breakage detection device includes a voltage discrimination circuit that generates an output by comparing it with a set reference voltage, and an output circuit that operates based on the output from the voltage discrimination circuit.
これによって本考案は糸に接触圧を殆どかけることなく
糸の正常走行と糸切れを高精度に検出することができ、
しかも、糸切れ検出を糸の直線走行の任意の位置で行う
ことができるため、本考案の糸切れ検出装置は巻取機に
限定することなく糸が走行する各種繊維機械に容易に取
付けることができ、特に、本考案においては、巻取り走
行の糸に実質的に何らの走行抵抗を付与することなしに
、糸走行と機械振動とを確実に区別して、機械振動の影
響を何ら受けることなく糸切れを確実に検知することが
できるうえ、巻取り途上おけるクラッチ・ブレーキの異
常動作或はベルトのゆるみ等による糸走行速度の低下を
も容易に検知することができる効果がある。As a result, the present invention can detect normal running of the thread and thread breakage with high precision without applying almost any contact pressure to the thread.
Moreover, since yarn breakage detection can be performed at any position in the straight line travel of the yarn, the yarn breakage detection device of the present invention can be easily installed not only in winders but also in various textile machines where yarn travels. In particular, in the present invention, it is possible to reliably distinguish between yarn running and mechanical vibration without imparting any running resistance to the yarn as it is being wound, and without being affected by mechanical vibration. In addition to being able to reliably detect yarn breakage, it is also possible to easily detect a decrease in yarn running speed due to abnormal clutch/brake operation or belt loosening during winding.
第1図は本考案の一実施例のブロック図、第2図はその
周波数弁別特性を示す特性図、第3図はその電気回路図
である。
2・・・・・・糸、4・・・・・・検知片、5・・・・
・・圧電素子、6・・・・・・周波数弁別回路、7・・
・・・・増幅回路、8・・・・・・整流平滑回路、9・
・・・・・電圧弁別回路、10・・・・・・出力回路。FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a characteristic diagram showing its frequency discrimination characteristics, and FIG. 3 is its electrical circuit diagram. 2... Thread, 4... Sensing piece, 5...
...Piezoelectric element, 6...Frequency discrimination circuit, 7...
...Amplification circuit, 8... Rectification and smoothing circuit, 9.
...Voltage discrimination circuit, 10...Output circuit.
Claims (1)
波数の出力を発生させる圧電素子と、該圧電素子からの
糸の正常走行時の特定周波数の出力のみを通過させる周
波数弁別回路と、該周波数弁別回路からの出力を増幅す
る増幅回路と、該増幅回路からの出力を整流後平滑する
整流平滑回路と、該整流平滑回路からの出力が糸の正常
走行に対応して予め設定した基準電圧と比較して出力を
発生させる電圧弁別回路と、該電圧弁別回路からの出力
によって作動する出力回路とのそれぞれを備えたことを
特徴とする糸切れ検出装置。a piezoelectric element that comes into contact with a linearly running portion of the thread and generates an output at a frequency corresponding to the running speed of the thread; a frequency discrimination circuit that passes only the output of a specific frequency from the piezoelectric element when the thread is normally running; an amplifier circuit that amplifies the output from the frequency discrimination circuit; a rectifier and smoothing circuit that rectifies and smoothes the output from the amplifier circuit; and a preset standard for the output from the rectifier and smoother circuit to correspond to normal running of the yarn. A thread breakage detection device comprising: a voltage discrimination circuit that generates an output by comparing the voltage; and an output circuit that operates based on the output from the voltage discrimination circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11944082U JPS5914465Y2 (en) | 1982-08-04 | 1982-08-04 | Thread breakage detection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11944082U JPS5914465Y2 (en) | 1982-08-04 | 1982-08-04 | Thread breakage detection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5867849U JPS5867849U (en) | 1983-05-09 |
JPS5914465Y2 true JPS5914465Y2 (en) | 1984-04-27 |
Family
ID=29913502
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11944082U Expired JPS5914465Y2 (en) | 1982-08-04 | 1982-08-04 | Thread breakage detection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5914465Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE9900792D0 (en) * | 1999-03-03 | 1999-03-03 | Iro Patent Ag | Method for monitoring run / stop conditions of a yarn |
-
1982
- 1982-08-04 JP JP11944082U patent/JPS5914465Y2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5867849U (en) | 1983-05-09 |
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