JP2012241294A - Thread detector - Google Patents

Thread detector Download PDF

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JP2012241294A
JP2012241294A JP2011113474A JP2011113474A JP2012241294A JP 2012241294 A JP2012241294 A JP 2012241294A JP 2011113474 A JP2011113474 A JP 2011113474A JP 2011113474 A JP2011113474 A JP 2011113474A JP 2012241294 A JP2012241294 A JP 2012241294A
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yarn
light
width direction
light source
thread
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Katsuhiro Hori
克弘 堀
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Gunze Ltd
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Gunze Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a thread detector capable of securely detecting the positional change in a crosswise direction of threads as well as the running state of the threads.SOLUTION: A thread detector 1 comprises a light source 17 for irradiating a thread and a plurality of thread detecting parts 18 disposed with a prescribed interval in a running direction of thread capable of changing an output signal in response to intensity of a received light from the light source 17. The thread detecting part 18 is made into a belt-like shape extending in a crosswise direction orthogonal to the running direction. The light source 17 is installed so as to differentiate the amount of light received in the crosswise direction. The thread detector 1 further comprises a calculation unit 19 for calculating the running state and the positional change in the crosswise direction of thread on the basis of the output signal in response to the amount of light received at the thread detecting part 18.

Description

本発明は、例えば、織機、ミシンなどの繊維機械において糸の状態を検出する糸検出装置に関するものである。   The present invention relates to a yarn detection device that detects the state of a yarn in a textile machine such as a loom or a sewing machine.

織機、ミシンなどの繊維機械において、当該繊維機械に給糸する糸条の走行状態を検出する装置として様々なものが開発されてきている(例えば、特許文献1)。
特許文献1では、発光素子、差動型空間フィルター素子及び糸条走行用の筒状透明ガイドをそれぞれ密閉容器間に設け、且つ並列状に設置したスリット列からなるスリット列群A及びスリット列からなるスリット列Bをそれぞれ別途に一体化連設するとともにスリットA、Bを交互に設置して差動型空間フィルター素子を構成する。そして、この差動空間フィルターに平行光或いは点光源を照射して糸条を走行させ、差動型空間フィルター素子上に投影された陰影の移動によりこれを感知し、差動型空間フィルター素子の出力の電気信号をパルス列に変換して糸条の走行糸長さや糸速度、糸切れ等を監視している。この特許文献1の関連技術として、その他に特許文献2などがある。
In a textile machine such as a loom or a sewing machine, various devices have been developed as devices for detecting a running state of a yarn fed to the textile machine (for example, Patent Document 1).
In Patent Document 1, a light emitting element, a differential spatial filter element, and a cylindrical transparent guide for running a yarn are provided between hermetic containers, respectively, and from a slit array group A and a slit array that are formed in parallel. The slit row B is separately integrated and connected, and the slits A and B are alternately installed to constitute a differential spatial filter element. Then, this differential spatial filter is irradiated with parallel light or a point light source to run the yarn, and this is detected by the movement of the shadow projected on the differential spatial filter element. The output electric signal is converted into a pulse train to monitor the running yarn length, yarn speed, yarn breakage, etc. of the yarn. In addition, there is Patent Document 2 as a related technique of Patent Document 1.

特開昭63−37082号公報JP-A-63-37082 特開2009−179410号公報JP 2009-179410 A

特許文献1や特許文献2の技術では、差動型フォルターからのパルス信号が出力されている場合は、糸条が走行していると検知し、パルス信号が出力されていない場合は、糸条が走行していないと検知している。即ち、特許文献1及び特許文献2ではパルス信号の有無によって糸条の走行を検知している。
しかしながら、これらの特許文献では、糸条の走行状態を検知することができるものの、糸条の幅方向の動き(幅方向の位置変化)を検出することができないのが実情であった。
In the techniques of Patent Document 1 and Patent Document 2, when a pulse signal is output from the differential type filter, it is detected that the yarn is traveling, and when the pulse signal is not output, the yarn is output. Is detected as not running. That is, in Patent Document 1 and Patent Document 2, the running of the yarn is detected based on the presence or absence of a pulse signal.
However, in these patent documents, although the running state of the yarn can be detected, the actual situation is that the movement in the width direction of the yarn (position change in the width direction) cannot be detected.

本発明は、上記事情に鑑みてなされたものであって、糸条の走行状態だけでなく、糸条の幅方向の位置変化も確実に検出することができる糸検出装置を提供することを目的とする。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a yarn detection device that can reliably detect not only the running state of the yarn but also the positional change in the width direction of the yarn. And

前記目的を達成するために、本発明は次の手段を講じた。
即ち、本発明は、糸条に向けて光を照射する光源と、前記光源からの照射された光の受光量に応じて出力信号が変化し且つ糸条の走行方向に沿って所定間隔で設置された複数の糸検出部とを備えた糸検出装置において、前記糸検出部は、前記走行方向に直交する幅方向に伸びる帯状とされ、前記光源は、前記幅方向における受光量が異なるように設置されており、前記糸検出部の受光量の応じた出力信号に基づいて糸の走行状態及び幅方向の位置変化を求める演算部を備えていることを特徴とする。
In order to achieve the above object, the present invention has taken the following measures.
That is, the present invention has a light source that emits light toward the yarn, and an output signal that changes according to the amount of light received from the light source, and is installed at predetermined intervals along the running direction of the yarn. In the yarn detection device including the plurality of yarn detection units, the yarn detection unit has a belt-like shape extending in the width direction orthogonal to the traveling direction, and the light source has a different light receiving amount in the width direction. It is installed, and is provided with a calculation unit for obtaining a running state of the yarn and a change in position in the width direction based on an output signal corresponding to the amount of light received by the yarn detection unit.

前記演算部は、前記走行方向に並ぶ糸検出部から出力される出力信号の差に基づいて走行状態及び幅方向の位置変化を求めるようにするとよい。
前記糸条が内部を走行すると共に光を透過する筒状の糸走行部が、前記糸検出部と光源との間に設置されており、前記糸条は非張力状態で前記糸走行部を通過することが好ましい。前記糸条は、耐熱性繊維とすることができる。
The arithmetic unit may obtain a traveling state and a position change in the width direction based on a difference between output signals output from the yarn detecting units arranged in the traveling direction.
A cylindrical yarn traveling portion that allows light to pass through while the yarn travels inside is installed between the yarn detecting portion and the light source, and the yarn passes through the yarn traveling portion in a non-tensioned state. It is preferable to do. The yarn may be a heat resistant fiber.

本発明に係る糸検出装置では、糸条の走行状態だけでなく、糸条の幅方向の位置変化も確実に検出することができる。   In the yarn detection device according to the present invention, not only the running state of the yarn but also the positional change in the width direction of the yarn can be reliably detected.

織機に設置した糸検出装置を示した全体図である。It is the whole figure which showed the thread | yarn detection apparatus installed in the loom. 糸検出装置の構成図である。It is a block diagram of a thread | yarn detection apparatus. 糸検出部の平面図である。It is a top view of a thread | yarn detection part. 糸検出装置によって糸条の状態を検出するフローチャート図である。It is a flowchart figure which detects the state of a thread | yarn by a thread | yarn detection apparatus. 第1近接センサ及び第2近接センサの信号と差動出力信号との関係図である。It is a relationship diagram of the signal of a 1st proximity sensor and a 2nd proximity sensor, and a differential output signal. 緯糸の状態を示す図である。It is a figure which shows the state of a weft. 差動出力信号の変化図である。It is a change figure of a differential output signal.

以下、本発明の実施の形態を、図面に基づき説明する。
図1乃至図7は、本発明に係る糸検出装置1の一実施形態を示している。
糸検出装置1は、織機、ミシンなどの繊維機械に設置されるもので、繊維機械に給糸される糸条の状態を検出するものである。図1は、織機2に設置した糸検出装置1を示したものである。まず、織機2について説明する。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 7 show an embodiment of a yarn detection device 1 according to the present invention.
The yarn detection device 1 is installed in a textile machine such as a loom or a sewing machine, and detects the state of the yarn supplied to the textile machine. FIG. 1 shows a yarn detection device 1 installed in a loom 2. First, the loom 2 will be described.

織機2は、横並び状態で縦方向へ一斉に給糸される多数本の経糸3を複数の綜絖枠4中へくぐらせてゆき、各綜絖枠4のタイミングを異ならせた上下動作で経糸3の並び列に杼口5を開口形成させ、この杼口5内を横切るように緯糸6を給糸し、杼口5内の緯糸6を筬(リード)7によって織り生地の織前へ押し込むことによって織りを進める(織成する)機械ものである。この織機2は、綜絖枠4と筬7との前後間を横切るように移動して緯糸6を給糸する給糸用レピア8を備え、この給糸用レピア8はレピア駆動部によって往復移動するようになっている。即ち、給糸用レピア8は、杼口5の上流側(図1の左側)に位置して給糸された緯糸6を掴む給糸開始位置Aと、杼口5の下流側(図1の右側)に位置して掴んだ糸を杼口5内に通す給糸終了位置Bとに往復移動可能となっている。   The loom 2 passes a large number of warp yarns 3 fed simultaneously in the longitudinal direction in a side-by-side state into the plurality of reed frames 4 and moves the warp yarns 3 in a vertical motion with different timings of the reed frames 4. By opening the shed 5 in the line, feeding the weft 6 so as to cross the inside of the shed 5, and pushing the weft 6 in the shed 5 into the front of the woven fabric by the heel (lead) 7 It is a machine that advances (weaves) weaving. The loom 2 includes a yarn supplying rapier 8 that moves across the front and rear of the reed frame 4 and the reed 7 and supplies the weft yarn 6, and the yarn supplying rapier 8 is reciprocated by a rapier drive unit. It is like that. That is, the yarn supplying rapier 8 is positioned upstream of the shed 5 (left side in FIG. 1) and grips the supplied weft 6 and downstream of the shed 5 (see FIG. 1). It is possible to reciprocate to a yarn supply end position B through which the thread located and gripped on the right side is passed through the shed 5.

給糸開始位置Aの上流側には、緯糸6の先端を把持して杼口5への給糸に待機させる糸端把持部10が設けられている。糸端把持部10の上流側には、一対の円板で緯糸6を上下から軽度に挟むようにして適度なブレーキ作用を生じさせ、それでいて緯糸6に対して過剰の張力や擦過力が加わらないようにすることによって緯糸6にシンバルテンションを付与する糸導入部11が設けられている。即ち、この織機2において、糸導入部11から下流側では、緯糸6にシンバルテンションが付与されて給糸する構成とされ、上流側では緯糸6を非張力状態として給糸する(消極糸送り)構成とされている。糸導入部11の上流側には糸検出装置1が設けられ、この糸検出装置1によって非張力状態で給糸されている緯糸6の状態(例えば、走行状態の有無、幅方向の位置変化)を検出することができるようになっている。   On the upstream side of the yarn feeding start position A, there is provided a yarn end gripping portion 10 that holds the tip of the weft yarn 6 and waits for yarn feeding to the shed 5. On the upstream side of the yarn end gripping portion 10, a moderate braking action is generated by slightly sandwiching the weft 6 from above and below with a pair of disks so that excessive tension and scratching force are not applied to the weft 6. Thus, a yarn introducing portion 11 is provided for applying cymbal tension to the weft 6. That is, in this loom 2, the weft yarn 6 is supplied with a cymbal tension on the downstream side from the yarn introduction section 11, and the weft yarn 6 is fed in a non-tension state on the upstream side (depolarized yarn feed). It is configured. The yarn detection device 1 is provided upstream of the yarn introduction unit 11, and the state of the weft yarn 6 fed in a non-tensioned state by the yarn detection device 1 (for example, whether there is a running state or a change in position in the width direction). Can be detected.

以下、糸検出装置1について詳しく説明する。
図2に示すように、糸検出装置1は、緯糸6などの糸条を走行(通過)させる糸走行部15を備えている。この糸走行部15は、光を透過する筒状のガラス管で構成されたもので、一端側(図2左側)及び他端側(図2右側)がケース16に固定されている。
このケース16内には、糸走行部15の上方側に設置されて糸走行部15内の糸条に向けて光を照射するLED等から構成された光源17が設置されている。また、ケース16内において、光源17の反対側であって糸走行部15(糸条)の下側に複数の糸検出部18が設置されている。各糸検出部18は、光源17からの照射された光の受光量に応じて電圧又は電流などの出力信号が変化するものであり、出力信号は演算部19に出力されるようになっている。
Hereinafter, the yarn detection device 1 will be described in detail.
As shown in FIG. 2, the yarn detection device 1 includes a yarn traveling unit 15 that travels (passes) a yarn such as the weft yarn 6. The yarn traveling portion 15 is formed of a cylindrical glass tube that transmits light, and one end side (left side in FIG. 2) and the other end side (right side in FIG. 2) are fixed to the case 16.
In the case 16, a light source 17 is installed which is installed on the upper side of the yarn traveling unit 15 and is configured by an LED or the like that emits light toward the yarn in the yarn traveling unit 15. In the case 16, a plurality of yarn detection units 18 are installed on the opposite side of the light source 17 and below the yarn traveling unit 15 (yarn). Each yarn detection unit 18 has an output signal such as voltage or current that changes in accordance with the amount of light received from the light source 17, and the output signal is output to the calculation unit 19. .

図3は、糸検出部18の拡大図を示したものである。
図3に示すように、糸検出部18は、糸条の走行方向に沿って所定間隔(例えば、25μm)で設置されたもので、走行方向に直交する幅方向に伸びる帯状とされている。各糸検出部18は、pnフォトダイオードやpinフォトダイオード等により構成されている。
FIG. 3 is an enlarged view of the yarn detection unit 18.
As shown in FIG. 3, the yarn detector 18 is installed at a predetermined interval (for example, 25 μm) along the traveling direction of the yarn, and has a strip shape extending in the width direction orthogonal to the traveling direction. Each yarn detection unit 18 is configured by a pn photodiode, a pin photodiode, or the like.

図3に示すように、走行方向に並ぶ各糸検出部18を見たとき、走行方向に1つ置き(1つ飛ばし)に各糸検出部18の幅方向端部側がそれぞれ一体的に連結されて櫛刃状となる受光部20、21が2つ形成されている。一方の受光部(第1受光部)20と他方の受光部(第2受光部)21とは、糸検出部18が互いに噛み合うように(第1受光部20の糸検出部18と第2受光部21の糸検出部18とが走行方向に交互に並ぶように)、設置されている。   As shown in FIG. 3, when the yarn detectors 18 arranged in the running direction are viewed, the end portions in the width direction of the yarn detectors 18 are integrally connected to each other (one skipped) in the running direction. Two light receiving portions 20 and 21 having a comb blade shape are formed. One light-receiving unit (first light-receiving unit) 20 and the other light-receiving unit (second light-receiving unit) 21 are arranged so that the yarn detection unit 18 meshes with each other (the yarn detection unit 18 of the first light-receiving unit 20 and the second light-receiving unit). And the yarn detection unit 18 of the unit 21 are alternately arranged in the running direction).

本実施形態において、各糸検出部18のそれぞれの形成ピッチPを75μmに設定し、各糸検出部18の形成大きさWを50μm、糸検出部18の間に生じさせる隙間Gを25μmとした。
第1受光部20及び第2受光部21は、光源17からの光が糸条によって遮断されて各糸検出部18に陰が生じると各糸検出部18での総受光量が変化し、この総受光量に対応した出力信号を演算部19に出力する。演算部19では、後述するように第1受光部20からの出力信号と、第2受光部21からの出力信号との差、即ち、走行方向に並列する(並ぶ)糸検出部18から出力される出力信号の差に基づいて走行状態や幅方向の位置変化を求めている。この実施形態では、糸条の走行状態や幅方向の位置変化によって給糸異常を検出したときは、給糸用レピア8(織機2)を自動的に停止する制御を行うこととしている。
In the present embodiment, the formation pitch P of each yarn detector 18 is set to 75 μm, the formation size W of each yarn detector 18 is 50 μm, and the gap G generated between the yarn detectors 18 is 25 μm. .
The first light receiving unit 20 and the second light receiving unit 21 change the total amount of light received by each yarn detecting unit 18 when the light from the light source 17 is blocked by the yarn and the shade is generated in each yarn detecting unit 18. An output signal corresponding to the total amount of received light is output to the calculation unit 19. As will be described later, the calculation unit 19 outputs the difference between the output signal from the first light receiving unit 20 and the output signal from the second light receiving unit 21, that is, the yarn detection unit 18 that is parallel (aligned) in the running direction. Based on the difference in output signal, the running state and the position change in the width direction are obtained. In this embodiment, when a yarn feeding abnormality is detected based on the running state of the yarn or a change in the position in the width direction, control is performed to automatically stop the yarn feeding rapier 8 (the loom 2).

図1に示すように、給糸用レピア8の往復移動に応じて移動する駆動帯24の上方に2個の検知センサ22、23が設けられている。一方の検知センサ(第1近接センサ)22は、駆動帯24に設けた計測ポイントPを検知し、駆動帯24に設けた一定間隔の凹凸部の数を検知し、当該凹凸部の数をパルス信号として演算部19に出力する。同様に、他方の検知センサ(第2近接センサ)23も凹凸部の数をパルス信号として演算部19に出力する。   As shown in FIG. 1, two detection sensors 22 and 23 are provided above a driving band 24 that moves in accordance with the reciprocating movement of the yarn feeding rapier 8. One detection sensor (first proximity sensor) 22 detects the measurement point P provided in the drive band 24, detects the number of uneven portions provided in the drive band 24, and pulses the number of the uneven portions. It outputs to the calculating part 19 as a signal. Similarly, the other detection sensor (second proximity sensor) 23 also outputs the number of concavo-convex portions to the calculation unit 19 as a pulse signal.

したがって、第1近接センサ22からのパルス信号及び第2近接センサ23からのパルス信号が入力されている場合は、給糸用レピア8が移動していることを検知することができ、パルス信号が演算部19に入力されてない場合は、給糸用レピア8が移動していないことを検知することができる。そのため、給糸用レピア8が移動しているときに給糸異常を検出したときに、給糸用レピア8(織機2)を自動的に停止することができる。なお、第1近接センサ22及び第2近接センサ23によってパルス信号のパルス数を計測することによって給糸用レピア8の給糸速度を求めることができる。   Accordingly, when the pulse signal from the first proximity sensor 22 and the pulse signal from the second proximity sensor 23 are input, it can be detected that the yarn feeding rapier 8 is moving, and the pulse signal is When it is not inputted to the calculation unit 19, it can be detected that the yarn feeding rapier 8 is not moving. Therefore, when a yarn feeding abnormality is detected while the yarn feeding rapier 8 is moving, the yarn feeding rapier 8 (the loom 2) can be automatically stopped. The yarn feeding speed of the yarn feeding rapier 8 can be obtained by measuring the number of pulses of the pulse signal by the first proximity sensor 22 and the second proximity sensor 23.

さて、図3に示すように、本発明では、糸条が存在しない状態(光源17の光をそのまま糸検出部18に照射する状態)において、光源17から各糸検出部18に光を照射したときの光量分布を見たとき、幅方向における糸検出部18の受光量が異なるように、光源17の設置を行っている。
詳しくは、各糸検出部18の幅方向中央部30側の光量が両端側の光量よりも小さくなるように光源17の設置位置などを調整している。言い換えれば、1つ1つの糸検出部18において幅方向の光量分布を見たときに、糸検出部18の幅方向中央部30に当たる光が糸検出部18の幅方向両端部31に当たる光よりも明るくなるように、幅方向に明暗を付けている。
Now, as shown in FIG. 3, in the present invention, in a state where no yarn is present (in a state where the light from the light source 17 is irradiated to the yarn detection unit 18 as it is), each yarn detection unit 18 is irradiated with light from the light source 17. The light source 17 is installed so that the amount of light received by the yarn detector 18 in the width direction is different when the light quantity distribution at that time is viewed.
Specifically, the installation position and the like of the light source 17 are adjusted so that the amount of light on the width direction central portion 30 side of each yarn detection unit 18 is smaller than the amount of light on both ends. In other words, when the light amount distribution in the width direction is viewed in each yarn detection unit 18, the light hitting the center 30 in the width direction of the yarn detection unit 18 is more light than the light hitting both ends 31 in the width direction of the yarn detection unit 18. Brightness is added in the width direction to make it brighter.

このような光量の差は、例えば第1受光部20及び第2受光部21に対して光源17を近接させたり、第1受光部20及び第2受光部21と光源17との間にフィルターや特殊レンズを設置することによって意図的に生じさせている。
図4は、織機2にて緯糸6を給糸しているときに糸検出装置1によって緯糸6(糸条)の状態を検出する手順を示したものである。
Such a difference in the amount of light may be caused, for example, by bringing the light source 17 close to the first light receiving unit 20 and the second light receiving unit 21, or by using a filter or the like between the first light receiving unit 20 or the second light receiving unit 21 and the light source 17. This is intentionally generated by installing a special lens.
FIG. 4 shows a procedure for detecting the state of the weft 6 (yarn) by the yarn detecting device 1 when the weft 6 is being fed by the loom 2.

まず、緯糸6を非張力状態で糸走行部15に通し、糸走行部15に通した緯糸6を糸端把持部10に通して給糸を開始する(S1)。光源17を緯糸6に照射して第1受光部20及び第2受光部21で受光している受光量に応じた出力信号を演算部19に入力する(S2)。第1受光部20における出力信号と、第2受光部21における出力信号との差(差動出力信号)を演算部19で算出する(S3)。ここで、第1受光部20における出力信号と第2受光部21における出力信号との差が無い場合は、差動出力信号は出力せず、第1受光部20における出力信号と第2受光部21における出力信号との差があれば差動出力信号が出力することとなる。なお、差動出力信号は、どのような出力でもよいが差動出力信号の大きさに応じて振幅、パルス間隔、デュ−ティ比などが変化するパルス信号として出力することが好ましい。   First, the weft yarn 6 is passed through the yarn running portion 15 in a non-tensioned state, and the weft yarn 6 passed through the yarn running portion 15 is passed through the yarn end gripping portion 10 to start feeding (S1). The light source 17 is irradiated onto the weft 6 and an output signal corresponding to the amount of light received by the first light receiving unit 20 and the second light receiving unit 21 is input to the calculation unit 19 (S2). A difference (differential output signal) between the output signal from the first light receiving unit 20 and the output signal from the second light receiving unit 21 is calculated by the calculation unit 19 (S3). Here, when there is no difference between the output signal in the first light receiving unit 20 and the output signal in the second light receiving unit 21, the differential output signal is not output, and the output signal in the first light receiving unit 20 and the second light receiving unit. If there is a difference from the output signal at 21, a differential output signal is output. The differential output signal may be any output, but is preferably output as a pulse signal whose amplitude, pulse interval, duty ratio, etc. change according to the magnitude of the differential output signal.

次に、演算部19は、第1近接センサ22及び第2近接センサ23によって給糸用レピア8(織機2)が移動状態にあるか否かを信号有無によって検知する(S4)。そして、給糸用レピア8(織機2)が移動状態であると(S4、Yes)、次ぎに進み、演算部19は、差動出力信号の出力があるか否か(パルス信号の有無)を検出する(S5)。なお、第1近接センサ22及び第2近接センサ23の信号と、差動出力信号との関係は、図5に示すようになる。   Next, the calculation unit 19 detects whether the yarn feeding rapier 8 (the loom 2) is in a moving state by the first proximity sensor 22 and the second proximity sensor 23 based on the presence or absence of a signal (S4). Then, when the yarn feeding rapier 8 (the loom 2) is in the moving state (S4, Yes), the operation proceeds to the next, and the calculation unit 19 determines whether or not there is a differential output signal output (presence / absence of a pulse signal). Detect (S5). The relationship between the signals of the first proximity sensor 22 and the second proximity sensor 23 and the differential output signal is as shown in FIG.

そして、差動出力信号の出力が有ると次ぎに進み、演算部19で縦糸の状態を求める。例えば、図6(a)に示すように、緯糸6が糸検出部18(第1受光部20及び第2受光部21)の幅方向中央部30に位置しているときと、図6(b)に示すように、緯糸6が糸検出部18の幅方向両端部31側に位置しているときとの差動出力信号の差を考えたとき、図7に示すように、緯糸6が幅方向中心部から端部側にいけばいくほど差動出力信号の差は大きくなる傾向にある。   Then, when there is an output of the differential output signal, the process proceeds to the next, and the state of the warp is obtained by the calculation unit 19. For example, as shown in FIG. 6A, when the weft 6 is located at the center 30 in the width direction of the yarn detection unit 18 (the first light receiving unit 20 and the second light receiving unit 21), FIG. As shown in FIG. 7, when the difference in the differential output signal from when the weft 6 is positioned on both ends 31 in the width direction of the yarn detector 18 is considered, as shown in FIG. The difference between the differential output signals tends to increase as the distance from the center of the direction increases to the end.

そのため、演算部19は、差動出力信号の変化が大きいときは、緯糸6が幅方向に大きく位置変化していると判断する。ここで、例えば、連続して差動出力信号の変化があるときは、緯糸6が幅方向に振動していると考えられるため、単に幅方向の位置変化の度合いだけでなく、緯糸6の振動を検知することができる。一方、演算部19は、差動出力信号の変化が少ないときは、緯糸6は、振動することなく走行状態であると判断する。   Therefore, when the change in the differential output signal is large, the calculation unit 19 determines that the position of the weft 6 is greatly changed in the width direction. Here, for example, when there is a continuous change in the differential output signal, it is considered that the weft thread 6 vibrates in the width direction. Therefore, not only the degree of position change in the width direction but also the vibration of the weft thread 6 Can be detected. On the other hand, when the change in the differential output signal is small, the arithmetic unit 19 determines that the weft 6 is in a traveling state without vibration.

そして、演算部19が緯糸6の状態を求めると、演算部19は、例えば、表示装置(モニタ)や音声出力装置などに緯糸6の状態(走行の有無、幅方向に位置ズレの有無、振動しているかなど)を知らせる信号を出力する(S7)。なお、上述したように、給糸用レピア8が移動しているときに緯糸6が検出されないなど給糸異常を検出したときは、給糸用レピア8(織機2)を自動的に停止することができる。   Then, when the calculation unit 19 obtains the state of the weft 6, the calculation unit 19 displays the state of the weft 6 (running presence / absence, presence / absence of displacement in the width direction, vibration, etc.) on, for example, a display device (monitor) or an audio output device. (S7). As described above, when a yarn feeding abnormality is detected such that the weft yarn 6 is not detected when the yarn feeding rapier 8 is moving, the yarn feeding rapier 8 (the loom 2) is automatically stopped. Can do.

以上、本発明によれば、糸条の走行状態だけでなく糸条の幅方向の位置変化も確実に検出することができ、例えば、給糸用レピア8が移動している状態において糸条が正常に給糸しているかどうかや糸条の振動している状態などを検知することができる。
つまり、糸条の走行検出や糸条の振動検出によって給糸異常の有無を判別するようにしているので、給糸ミスを含め、糸条の給糸異常を確実に判別することができる。そのため、給糸異常の発生時にはただちに織機2を停止させることができるものであり、糸条のみならず、縦糸の無駄な給糸を徹底して防止できる(歩留まり低下の防止)利点がある。勿論、織機21の停止時間を最小限に抑えられるので、稼働効率の低下を防止できる利点もある。
As described above, according to the present invention, not only the running state of the yarn but also the change in the position in the width direction of the yarn can be reliably detected. For example, the yarn can be moved while the rapier 8 for yarn feeding is moving. It is possible to detect whether the yarn is normally fed or the yarn is vibrating.
In other words, since the presence or absence of a yarn feeding abnormality is determined by detecting the running of the yarn or the vibration of the yarn, it is possible to reliably determine the yarn feeding abnormality including a yarn feeding error. Therefore, the loom 2 can be stopped immediately when a yarn feeding abnormality occurs, and there is an advantage that wasteful feeding of not only the yarn but also the warp yarn can be thoroughly prevented (a reduction in yield). Of course, since the stop time of the loom 21 can be minimized, there is also an advantage that it is possible to prevent a decrease in operating efficiency.

本発明は、上記実施形態に限定されるものではなく、実施の形態に応じて適宜変更可能である。
糸検出装置1にて状態を検出する糸条は特に限定されないが、本発明の糸検出装置1では、糸条が炭化ケイ素系繊維やカーボン繊維等の耐熱性繊維であると好ましい。炭化ケイ素系繊維糸を構成する炭化ケイ素系繊維としては、例えば炭化ケイ素からなる繊維、炭素−ケイ素−酸素から構成される繊維、炭素−チタン及び/又はジルコニウム−ケイ素−酸素から構成される繊維、炭素−ケイ素−酸素−ホウ素から構成される繊維等が挙げられる。このような耐熱性繊維は、低屈曲性、低伸び性、高脆性であるため、織機2などでは非張力状態に保持させながら送り込む消極送りを行うことが多い。本発明の糸検出装置1では、特に消極送りを行っている区間での糸条の状態を検出することに優れている。また、この糸検出装置1では、毛羽が少なく断面形状が扁平(円形でない)である耐熱性繊維に対して、特に走行状態と振動状態との両方を検出し易いということでも優れている。
The present invention is not limited to the above-described embodiment, and can be appropriately changed according to the embodiment.
The yarn whose state is detected by the yarn detection device 1 is not particularly limited. However, in the yarn detection device 1 of the present invention, it is preferable that the yarn is a heat-resistant fiber such as silicon carbide fiber or carbon fiber. Examples of the silicon carbide fiber constituting the silicon carbide fiber yarn include a fiber composed of silicon carbide, a fiber composed of carbon-silicon-oxygen, a fiber composed of carbon-titanium and / or zirconium-silicon-oxygen, Examples thereof include fibers composed of carbon-silicon-oxygen-boron. Since such heat-resistant fibers have low flexibility, low elongation, and high brittleness, the loom 2 or the like often performs depolarization feeding while keeping it in a non-tensioned state. The yarn detection device 1 according to the present invention is particularly excellent in detecting the state of the yarn in the section where the negative feed is performed. The yarn detection device 1 is also excellent in that it is easy to detect both the running state and the vibration state, particularly with respect to heat-resistant fibers having few fuzz and a flat (non-circular) cross-sectional shape.

本発明は、上記実施形態に限定されるものではなく、実施の形態に応じて適宜変更可能である。糸検出部18の数は限定されないが、糸検出部18の数が多ければ出力電圧の積算値(総受光量)も大きくなって検出精度も上がるので、ある程度、多くするのが好ましい。また、第1受光部20と第2受光部21とを用いて、即ち、差動出力信号を用いて走行状態と振動状態とを検出しているが、どちらか一方(1つの受光部、差動出力信でない)で走行状態と振動状態とを検出してもよい。   The present invention is not limited to the above-described embodiment, and can be appropriately changed according to the embodiment. The number of yarn detection units 18 is not limited. However, if the number of yarn detection units 18 is large, the integrated value (total amount of received light) of the output voltage increases and the detection accuracy increases, so it is preferable to increase the number to some extent. In addition, the traveling state and the vibration state are detected using the first light receiving unit 20 and the second light receiving unit 21, that is, using a differential output signal. It is also possible to detect the running state and the vibration state by not the dynamic output signal.

また、上記の実施形態では、幅方向中央部30側の光量を多く、幅方向両端部31側の光量を少なくなるように光源の位置を調整していたが、糸検出部18において幅方向での光量を異ならせるようにすればどのような形態でもよく、例えば、幅方向中央部30側の光量を幅方向両端部31側の光量をよりも小さくなるようにしてもよいし、その他に、一方の幅方向端部側から他方の幅方向端部側にいくにしたがって徐々に光量を多くしてもよい。   Further, in the above embodiment, the position of the light source is adjusted so that the light amount on the width direction central portion 30 side is increased and the light amount on the width direction both end portions 31 side is decreased. As long as the amount of light is made different, for example, the amount of light on the width direction center portion 30 side may be made smaller than the amount of light on the width direction both end portions 31 side, The amount of light may be gradually increased from one width direction end side to the other width direction end side.

1 糸検出装置
2 織機
3 経糸
4 綜絖枠
5 杼口
6 緯糸
7 筬(リード)
8 給糸用レピア
10 糸端把持部
11 糸導入部
15 糸走行部
16 ケース
17 光源
18 糸検出部
19 演算部
20 第1受光部
21 第2受光部
22 第1近接センサ
23 第2近接センサ
24 駆動帯
DESCRIPTION OF SYMBOLS 1 Yarn detection apparatus 2 Weaving machine 3 Warp thread 4 Reed frame 5 Reed opening 6 Weft 7 Reed (lead)
8 Yarn supply rapier 10 Yarn end gripping part 11 Yarn introduction part 15 Yarn traveling part 16 Case 17 Light source 18 Yarn detection part 19 Calculation part 20 First light receiving part 21 Second light receiving part 22 First proximity sensor 23 Second proximity sensor 24 Driving belt

Claims (4)

糸条に向けて光を照射する光源と、前記光源からの照射された光の受光量に応じて出力信号が変化し且つ糸条の走行方向に沿って所定間隔で設置された複数の糸検出部とを備えた糸検出装置において、
前記糸検出部は、前記走行方向に直交する幅方向に伸びる帯状とされ、前記光源は、前記幅方向における受光量が異なるように設置されており、
前記糸検出部の受光量の応じた出力信号に基づいて糸の走行状態及び幅方向の位置変化を求める演算部を備えていることを特徴とする糸検出装置。
A light source that emits light toward the yarn, and a plurality of yarns that are installed at predetermined intervals along the running direction of the yarn and whose output signal changes according to the amount of light received from the light source. In a yarn detection device comprising a portion,
The yarn detection unit has a belt-like shape extending in the width direction orthogonal to the traveling direction, and the light source is installed so that the amount of light received in the width direction is different,
A yarn detection device comprising: a calculation unit that obtains a running state of a yarn and a change in position in a width direction based on an output signal corresponding to the amount of light received by the yarn detection unit.
前記演算部は、前記走行方向に並ぶ糸検出部から出力される出力信号の差に基づいて走行状態及び幅方向の位置変化を求めることを特徴とする請求項1に記載の糸検出装置。   2. The yarn detection device according to claim 1, wherein the calculation unit obtains a running state and a position change in the width direction based on a difference between output signals output from the yarn detection units arranged in the running direction. 前記糸条が内部を走行すると共に光を透過する筒状の糸走行部が、前記糸検出部と光源との間に設置されており、前記糸条は非張力状態で前記糸走行部を通過することを特徴とする請求項1又は2に記載の糸検出装置。   A cylindrical yarn traveling portion that allows light to pass through while the yarn travels inside is installed between the yarn detecting portion and the light source, and the yarn passes through the yarn traveling portion in a non-tensioned state. The yarn detecting device according to claim 1 or 2, wherein 前記糸条は、耐熱性繊維であることを特徴とする請求項1〜3のいずれかに記載の糸検出装置。   The yarn detection device according to claim 1, wherein the yarn is a heat-resistant fiber.
JP2011113474A 2011-05-20 2011-05-20 Thread detector Withdrawn JP2012241294A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015094059A (en) * 2013-11-14 2015-05-18 株式会社豊田自動織機 Weft detection device of air-jet machine
JP2016186144A (en) * 2015-03-27 2016-10-27 株式会社豊田自動織機 Weft detection device of air-jet machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015094059A (en) * 2013-11-14 2015-05-18 株式会社豊田自動織機 Weft detection device of air-jet machine
JP2016186144A (en) * 2015-03-27 2016-10-27 株式会社豊田自動織機 Weft detection device of air-jet machine

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