【発明の詳細な説明】[Detailed description of the invention]
この発明は走行糸条と非接触で毛羽を安定に、
かつ正確に検出できる毛羽検出装置に関する。
〈従来技術〉
従来糸条の毛羽検出装置には、主に静電容量式
センサーを用いたものと、光学的センサーを用い
たものがある。静電容量式センサーを用いたもの
は、走行中の糸条が中空構造の静電容量式センサ
ーの中を通過する時に、その糸条の毛羽による容
積変化にもとずく静電容量の変化を電気信号とし
て検出するものである。光学式を用いたものは光
学式センサーの中空構造内側に投光部とフオトダ
イオード等の受光素子とを配置して走行糸条がセ
ンサーの投光部と受光部の間を通過する時に、毛
羽のある場合とない場合の受光光量変化を検出し
て毛羽を検出するものである。
しかしながら前述の従来装置は、あらかじめ走
行糸条の糸の基準容積を決め、センサーで実測さ
れた走行糸条の糸の容積と基準容積とを比較し、
毛羽の大きさと毛羽の数を検出するものであるた
め、下記の問題があつた。
すなわち両者共糸条を中空構造のセンサー内を
通過させ、糸条の容積を検出して走行糸条の毛羽
を検出するため、センサーの中空構造部に糸の仕
上剤、毛羽の切れたもの等が溜るおそれがあり、
安定性の良い毛羽検出が難しい。又これらの従来
装置ではセンサーの中空構造内での走行糸条の振
動を防ぐため、センサーの入口、又は出口或はそ
の両方にガイドを設置し、走行糸条の振動を規制
するため何らかの接糸部が必要となり、そのため
走行糸条に悪影響を与える場合もあり、毛羽検出
装置としは非接触のものが望まれていた。
〈発明の概要〉
この発明は上記問題点を解決し、走行糸条と非
接触で毛羽を安定に、かつ正確に検出できる走行
糸条の毛羽検出装置を提供することを目的とす
る。
この目的を達成するため、この発明の毛羽検出
装置によれば、走行糸条の走行路と交差するよう
に毛羽検出針が配され、この毛羽検出針は正常の
走行糸条とは接触しないが、検出されるべき毛羽
と接触するようにされ、その毛羽検出針の振動を
検出する振動検出器が設けられる。走行糸条の毛
羽が毛羽検出針と接触し、この振動が振動検出器
で毛羽として検出される。毛羽検出針は正常な走
行糸条に近接して非接触で配置するため、糸条に
悪影響を与えず、かつ糸条の仕上剤、毛羽の切れ
たもの等が検出器に溜まらない利点がある。また
糸条の毛羽そのものを検出するため、毛羽の数の
検出が正確である。
〈実施例〉
以下、この発明の実施例を図面によつて詳細に
説明する。第１図において糸条１は例えば延伸ロ
ール２によつて延伸され、糸支持ガイド３を通
り、ボビン４に巻きとられる。ボビン４は駆動ロ
ール５により回転される。ボビン４、駆動ロール
５、トラバース６はそれぞれワインダーフレーム
７に取付けられている。主フレーム８に延伸ロー
ル２、糸支持ガイド３及びワインダーフレーム７
が固定される。糸条１は延伸ロール２よりボビン
４へ走行する。
この発明においては延伸ロール２及びボビン４
間において走行糸条１の走行路と交差して毛羽検
出針１１が配される。毛羽検出針１１は第２図に
示すように毛羽のない正常走行糸条１の固有振動
幅の外側に位置し、且つ糸条１の検出すべき毛羽
の走行路上に位置される。糸条１が走行していな
い時の糸条１と毛羽検出針１１との間隔Ａは例え
ば約0.5mm〜20mmとするのが望ましい。Ａをあま
り小さくしすぎると正常な走行糸条１が毛羽検出
針１１と接触して雑音を拾い、Ａをあまり大きく
しすぎると小さい毛羽の検出もれが生じる。毛羽
検出針１１としては、例えばピアノ線等の弾力性
のある金属製の線が望ましく、プラステイツク製
等でも使用できる。
第３図に示すように毛羽検出針１１の振動を検
出する振動検出器１２が毛羽検出針１１に取付け
られる。例えば毛羽検出針１１の一端は検出針支
持体１３にねじ１４で固定され、その検出針支持
体１３に振動検出器１２が取付けられる。振動検
出器１２としては例えば加速度検出器を用いるこ
とができる。取付け金具１５に振動検出器１２が
取付けねじ１６によつて取付けられ、この取付け
金具１５は取付けねじ１７によつて主フレーム８
に固定されている。この時毛羽検出針１１はほゞ
水平に保持され、糸条１はほゞ垂直に走行され
る。振動検出器１２の検出出力は走行糸条１が毛
羽のない正常糸条の場合及び毛羽が検出すべきも
のより小さい場合は走行糸条１は毛羽検出針１１
と接触しない。しかし走行糸条１に検出すべき大
きさの毛羽があると、その毛羽は毛羽検出針１１
と接触し、その接触により毛羽検出針１１が振動
し、その振動は毛羽検出針１１に直結された振動
検出器１２により電気信号として検出される。従
つて振動検出器１２の出力により毛羽の存在を検
出できる。
〈実験例〉
1890デニールのナイロン66の紡糸延伸巻取工程
の延伸ロール直後に、第１図に示したように毛羽
検出針１１として直径0.7mm、長さ13cmのピアノ
線を設け、振動検出器１２として富士セラミツク
ス株式会社製加速度ピツクアツプ型式P51Sを取
付け、その出力をサン電子工業株式会社製プリア
ンプ型式MD405Pに入力し、走行糸条１と毛羽検
出針１１との距離Ａを３mmに設定した。糸条１の
走行速度は４ｍ／ｓで約16分間測定した結果を第
４図及び第５図に示す。第５図は人為的に毛羽を
発生させた時の結果であり、第４図は通常状態で
測定した結果である。
振動検出器１２の出力で検出された毛羽の数が
正確であるかどうかを調査した結果を下記に示
す。
This invention stabilizes the fluff without contacting the running yarn.
The present invention also relates to a fuzz detection device that can accurately detect fuzz. <Prior Art> Conventional yarn fuzz detection devices mainly include those using capacitive sensors and those using optical sensors. Capacitance type sensors detect changes in capacitance due to changes in volume due to the fluff of the running yarn as it passes through the hollow structure of the capacitance type sensor. It is detected as an electrical signal. Optical sensors have a light emitting part and a light receiving element such as a photodiode placed inside the hollow structure of the optical sensor, and when the traveling yarn passes between the light emitting part and the light receiving part of the sensor, it is able to remove fluff. This method detects fluff by detecting changes in the amount of received light with and without fluff. However, the above-mentioned conventional device determines the standard volume of the yarn of the traveling yarn in advance, compares the yarn volume of the traveling yarn actually measured by a sensor with the standard volume,
Since the method detects the size and number of fuzz, the following problems arose. In other words, in both cases, the thread is passed through a sensor with a hollow structure, and the volume of the thread is detected to detect the fuzz of the running thread. may accumulate,
Difficult to detect fuzz with good stability. In addition, in these conventional devices, in order to prevent the vibration of the running yarn within the hollow structure of the sensor, a guide is installed at the entrance or exit of the sensor, or both, and some type of welding is installed to regulate the vibration of the running yarn. A non-contact fuzz detection device has been desired since this may have an adverse effect on the running yarn. <Summary of the Invention> An object of the present invention is to solve the above-mentioned problems and provide a running yarn fuzz detection device that can stably and accurately detect fuzz without contacting the running yarn. In order to achieve this object, according to the fuzz detection device of the present invention, a fuzz detection needle is arranged so as to intersect with the running path of the running yarn, and the fuzz detection needle does not come into contact with the normal running yarn. A vibration detector is provided which is brought into contact with the fluff to be detected and detects vibrations of the fluff detection needle. The fluff of the running yarn comes into contact with the fluff detection needle, and this vibration is detected as fluff by the vibration detector. The fuzz detection needle is placed close to the normally running yarn without contacting it, so it has the advantage that it does not have a negative effect on the yarn, and that yarn finishing agents, broken fuzz, etc. do not accumulate in the detector. . Furthermore, since the fuzz itself is detected, the number of fuzz can be detected accurately. <Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings. In FIG. 1, a yarn 1 is stretched by, for example, a stretching roll 2, passes through a yarn support guide 3, and is wound onto a bobbin 4. The bobbin 4 is rotated by a drive roll 5. The bobbin 4, drive roll 5, and traverse 6 are each attached to a winder frame 7. The main frame 8 includes a drawing roll 2, a yarn support guide 3, and a winder frame 7.
is fixed. The yarn 1 travels from the drawing roll 2 to the bobbin 4. In this invention, the stretching roll 2 and the bobbin 4
A fluff detection needle 11 is arranged between the two, intersecting the running path of the running yarn 1. As shown in FIG. 2, the fuzz detection needle 11 is located outside the natural vibration width of the normally running yarn 1 without fuzz, and is located on the running path of the fuzz to be detected on the yarn 1. It is desirable that the distance A between the yarn 1 and the fuzz detection needle 11 when the yarn 1 is not running is, for example, approximately 0.5 mm to 20 mm. If A is made too small, the normal traveling yarn 1 will come into contact with the fuzz detection needle 11 and pick up noise, and if A is made too large, small fuzz will not be detected. The fuzz detection needle 11 is preferably made of elastic metal wire such as piano wire, but plastic wire or the like may also be used. As shown in FIG. 3, a vibration detector 12 for detecting vibrations of the fluff detection needle 11 is attached to the fluff detection needle 11. For example, one end of the fluff detection needle 11 is fixed to a detection needle support 13 with a screw 14, and a vibration detector 12 is attached to the detection needle support 13. As the vibration detector 12, for example, an acceleration detector can be used. The vibration detector 12 is attached to the mounting bracket 15 by a mounting screw 16, and the mounting bracket 15 is attached to the main frame 8 by a mounting screw 17.
is fixed. At this time, the fuzz detection needle 11 is held substantially horizontally, and the yarn 1 is run substantially vertically. The detection output of the vibration detector 12 indicates that when the running yarn 1 is a normal yarn without fuzz, and when the fuzz is smaller than what should be detected, the running yarn 1 is detected by the fuzz detection needle 11.
Do not come into contact with. However, if there is fluff on the running yarn 1 of a size that should be detected, the fluff will be removed by the fluff detection needle 11.
The fluff detection needle 11 vibrates due to the contact, and the vibration is detected as an electric signal by the vibration detector 12 directly connected to the fluff detection needle 11. Therefore, the presence of fluff can be detected from the output of the vibration detector 12. <Experimental example> Immediately after the stretching roll of 1890 denier nylon 66 in the spinning, drawing and winding process, a piano wire with a diameter of 0.7 mm and a length of 13 cm was provided as the fluff detection needle 11 as shown in Fig. 1, and a vibration detector was installed. 12, an acceleration pick-up model P51S manufactured by Fuji Ceramics Co., Ltd. was installed, and its output was input to a preamplifier model MD405P manufactured by Sun Electronics Co., Ltd., and the distance A between the running thread 1 and the fuzz detection needle 11 was set to 3 mm. The running speed of yarn 1 was 4 m/s for about 16 minutes, and the results are shown in FIGS. 4 and 5. FIG. 5 shows the results when fuzz was artificially generated, and FIG. 4 shows the results measured under normal conditions. The results of investigating whether the number of fuzz detected by the output of the vibration detector 12 is accurate are shown below.
【表】
墨汁テストとは、墨汁をつけた筆を毛羽検出針
と同じ位置に設置して毛羽に墨汁を塗り、後でワ
インダーより巻かれたボビンを人為的に解舒し
て、毛羽を人により数えた値である。
この発明装置による測定は実測値と同等の結果
となつた。つまりこの発明装置により毛羽を正し
く検出できることが確認できた。
〈効果〉
以上述べたようにこの発明によれば正常糸条と
非接触で毛羽を正確に検出できる。このように非
接触形式であり、しかも中空構造内に糸条を通す
ものでないから中空構造内に糸の仕上剤、毛羽の
切れたものなどが溜るおそれがなく、毛羽を安定
に検出でき、信頼性が高い、更に中空構造の入
口、出口に走行糸条の振動を防ぐガイドを設ける
ようなことも必要とせず、走行糸条が非接触であ
るため糸条に悪影響を与えるおそれもない。かつ
３mm程度以上の毛羽までもれなく検出できる。[Table] The ink test involves placing a brush dipped in ink in the same position as the fuzz detection needle, applying ink to the fuzz, and then manually unwinding the bobbin using a winder to manually remove the fuzz. This is the value calculated by Measurements using the device of this invention yielded results equivalent to actual measurements. In other words, it was confirmed that fluff can be detected correctly using the device of the present invention. <Effects> As described above, according to the present invention, fluff can be accurately detected without contacting normal yarns. Since it is a non-contact type and does not pass the yarn through the hollow structure, there is no risk of yarn finishing agents or broken fluff accumulating inside the hollow structure, making it possible to detect fluff stably and with reliability. Furthermore, it is not necessary to provide guides to prevent vibration of the running yarn at the entrance and exit of the hollow structure, and since the running yarn is not in contact with each other, there is no risk of adversely affecting the yarn. Moreover, even fluff of about 3 mm or more can be detected without fail.
【図面の簡単な説明】[Brief explanation of the drawing]
第１図はこの発明による毛羽検出装置の設定状
態を示す図、第２図は毛羽検出針と走行糸条の関
係を示す斜視図、第３図はこの発明による毛羽検
出装置の一例を示す正面図、第４図及び第５図は
それぞれこの発明装置を用いた毛羽検出出力の例
を示す図である。
１：走行糸条、１１：毛羽検出針、１２：振動
検出器、１３：検出針支持体。
FIG. 1 is a diagram showing the setting state of the fluff detection device according to the present invention, FIG. 2 is a perspective view showing the relationship between the fluff detection needle and the running yarn, and FIG. 3 is a front view showing an example of the fluff detection device according to the present invention. 4 and 5 are diagrams each showing an example of fuzz detection output using the device of the present invention. 1: Running yarn, 11: Fuzz detection needle, 12: Vibration detector, 13: Detection needle support.