JP5530686B2

JP5530686B2 - Weft detection device for water jet loom

Info

Publication number: JP5530686B2
Application number: JP2009214031A
Authority: JP
Inventors: 康弘倉; 亮介藤森; 宏明松波; 敏博木滑
Original assignee: Tsudakoma Industrial Co Ltd
Current assignee: Tsudakoma Corp
Priority date: 2009-09-16
Filing date: 2009-09-16
Publication date: 2014-06-25
Anticipated expiration: 2029-09-16
Also published as: CN102021723B; CN102021723A; JP2011063897A

Description

本発明は、水噴射式織機に用いられる緯糸検知装置に関するものである。 The present invention relates to a weft detection device used in a water jet loom.

水噴射式織機に用いられる緯糸検知装置の一つとして、筬打ち動作にともなって織前へ向けて運ばれる緯糸を受け入れるスリットが形成されたフィーラヘッドを有し、前記スリットを挟んで対向する投光部と受光部とにより前記スリットを通過する前記緯糸を検知し、緯入れの成否を判定するものがある。 As one of the weft detection devices used in water jet looms, it has a feeler head formed with slits for receiving wefts that are transported toward the front of the weave in accordance with the punching operation. There is a type in which the weft passing through the slit is detected by a light part and a light receiving part to determine the success or failure of the weft insertion.

前記フィーラヘッドとしては、単一の部材に切削加工により切り込みを入れてスリットを形成したもの（以下「一体型」という。）が一般的であるが、上下一対の別々の部材を間隔を空けて対向させることによりスリットを形成するもの（以下「分割型」という。）も存在する（例えば、特許文献１，２参照）。 The feeler head is generally a slit formed by cutting a single member by cutting (hereinafter referred to as “integrated type”), but a pair of upper and lower separate members are spaced apart. There are also those that form slits by facing each other (hereinafter referred to as “divided type”) (for example, see Patent Documents 1 and 2).

一体型のフィーラヘッドは、単一の部材に投光部及び受光部を固定するため、投光部と受光部の光軸（以下、単に「光軸」ともいう。）を一度一致させれば部材の変形等がない限り光軸にずれが生じない利点を有する。しかし、一般にスリットの間隔は狭い（２ｍｍ以下）ということもあって、検知面（投光面及び受光面）の状態を目視で確認することができないという欠点を有する。特に、水噴射式織機においては、１分間に数百回（多いもので１０００回以上）の割合でスリット間を緯糸が通過するため、投光部及び受光部の検知面に緯糸の油剤等による汚れが付着したり、摩耗等が生じ、その汚れ、摩耗が緯糸検知に悪影響を及ぼす場合がある。このため、検知面の状態の確認、清掃がしづらいという一体型のフィーラヘッドの欠点は、安定した緯糸検知を実現するためのメンテナンス上問題である。 Since the integrated feeler head fixes the light projecting unit and the light receiving unit to a single member, the optical axes of the light projecting unit and the light receiving unit (hereinafter also simply referred to as “optical axis”) are aligned once. As long as there is no deformation of the member, there is an advantage that the optical axis is not displaced. However, in general, the interval between the slits is narrow (2 mm or less), so that the state of the detection surface (light projecting surface and light receiving surface) cannot be visually confirmed. In particular, in a water jet loom, the weft passes between the slits at a rate of several hundred times per minute (1000 or more at most). Dirt adheres or wear occurs, and the dirt and wear may adversely affect the weft detection. For this reason, the drawback of the integrated feeler head that it is difficult to check and clean the state of the detection surface is a maintenance problem for realizing stable weft detection.

これに対し、分割型のフィーラヘッドは、例えば特許文献１，２に開示されるように、投光部を含むスリット上側の部材（上部材，（上）ホルダー）と受光部を含むスリット下側の部材（下部材，（下）ホルダー）とに分割でき、上下各部材はそれら部材と別体のサポート部材（ブラケット）に着脱自在に支持された構成となっている。そのため、前記上側の部材及び下側の部材の一方又は両方をサポート部材から取り外すことにより、検知面の状態を目視で確認でき、清掃等のメンテナンス作業も容易であるという利点を有する。 On the other hand, the split type feeler head, for example, as disclosed in Patent Documents 1 and 2, is a slit upper member including a light projecting unit (upper member, (upper) holder) and a slit lower side including a light receiving unit. These members (lower member, (lower) holder) can be divided, and the upper and lower members are detachably supported by support members (brackets) separate from these members. Therefore, by removing one or both of the upper member and the lower member from the support member, there is an advantage that the state of the detection surface can be visually confirmed and maintenance work such as cleaning is easy.

なお、特許文献１に記載の構成では、上側の部材及び下側の部材がサポート部材と共に共通のねじ部材（ボルト）によって共締めされてサポート部材に固定されている。また、特許文献２に記載の構成では、上側の部材及び下側の部材がそれぞれねじ部材（ビス）によってサポート部材に取り付けられている。ただし、特許文献２の構成では、上側及び下側の各部材は、ねじ部材が挿通される孔が長孔に形成されており、サポート部材に対する上側及び下側の各部材の前後方向（光軸及び緯糸と直交する方向）の位置が調整可能となっている。 In the configuration described in Patent Document 1, the upper member and the lower member are fastened together with the support member by a common screw member (bolt) and fixed to the support member. In the configuration described in Patent Document 2, the upper member and the lower member are respectively attached to the support member by screw members (screws). However, in the configuration of Patent Document 2, each of the upper and lower members has an elongated hole through which the screw member is inserted, and the front and rear directions (optical axis) of the upper and lower members with respect to the support member. And the position in the direction perpendicular to the weft) can be adjusted.

しかしながら、前述した分割型のフィーラヘッドは、次のような欠点を有する。すなわち、前記従来技術の構成では、メンテナンス作業のために上側の部材及び／又は下側の部材をサポート部材としてのブラケットから取り外し、メンテナンス作業後、ブラケットに対し再び組み付けるに際し、それら部材の位置決めが正確に行えず、投光部の光軸と受光部の光軸とがずれてしまい、メンテナンス作業の前後で投光部と受光部との対向精度を維持できないという問題がある。 However, the above-described split type feeler head has the following drawbacks. That is, in the configuration of the above prior art, the upper member and / or the lower member are removed from the bracket as the support member for maintenance work, and when the maintenance work is reassembled to the bracket, the positioning of these members is accurate. However, the optical axis of the light projecting unit and the optical axis of the light receiving unit are shifted from each other, and there is a problem that the facing accuracy between the light projecting unit and the light receiving unit cannot be maintained before and after the maintenance work.

詳しく説明すると、特許文献１の構成の場合でいえば、位置の固定はねじの締め付けによって行われるが、一般的に雄ねじ及びそれに螺合される雌ねじのねじ山とねじ溝との間には遊び（隙間）があるため、ねじの締付けの過程おいて、上記遊びの範囲で上側の部材と下側の部材とが前後方向に位置がずれ、光軸がずれるおそれがある。 More specifically, in the case of the configuration of Patent Document 1, the position is fixed by tightening a screw, but generally there is a play between a thread of a male screw and a female screw screwed into the screw thread and a screw groove. Since there is a (gap), in the process of tightening the screw, the upper member and the lower member may be displaced in the front-rear direction within the range of play, and the optical axis may be shifted.

また、特許文献２の構成では、前述のように、上側の部材及び下側の部材はブラケットに対し前後方向に位置調整可能となっており、作業者の組み付け方によっては投光部と受光部とが前後方向にずれた状態で組み付けられてしまい、光軸がずれるおそれがある。 In the configuration of Patent Document 2, as described above, the position of the upper member and the lower member can be adjusted in the front-rear direction with respect to the bracket. Depending on how the worker is assembled, the light projecting unit and the light receiving unit are provided. Are assembled in a state shifted in the front-rear direction, and the optical axis may be shifted.

以上のように、特許文献１、２の構成では、投光部と受光部との対向精度は作業者による組み付け作業に依存するものとなっており、投光部と受光部とを正確に対向させるためには作業が煩雑なものとならざるを得ず、メンテナンス作業に時間と手間を要してしまう。 As described above, in the configurations of Patent Documents 1 and 2, the facing accuracy between the light projecting unit and the light receiving unit depends on the assembly work by the operator, and the light projecting unit and the light receiving unit are accurately opposed to each other. In order to do this, the work must be complicated, and time and labor are required for the maintenance work.

そして、投光部と受光部との対向状態が変化すると、受光部への入射光量が変化するため、メンテナンス作業の前後で検知感度を一定に維持できず、メンテナンス作業のたびにゲイン等の調整を行わなければならなくなったり、調整不良の場合には正確に緯糸を検知することができなくなる。 And if the facing state of the light projecting unit and the light receiving unit changes, the amount of light incident on the light receiving unit changes, so the detection sensitivity cannot be kept constant before and after maintenance work, and gain etc. are adjusted each time maintenance work is performed In the case of poor adjustment, wefts cannot be accurately detected.

特開昭５８−２０８４４５号公報JP 58-208445 A

特開昭５１−５８５６６号公報Japanese Patent Laid-Open No. 51-58566

そこで、本発明の課題は、水噴射式織機に用いられる緯糸検知装置のうち、特に分割型のフィーラヘッドを有する緯糸検知装置に関し、メンテナンス作業のためにフィーラヘッドを分解した後、再び組み立てる際に、投光部の光軸と受光部の光軸とを容易に一致させることが可能な緯糸検知装置を提供することである。 Therefore, an object of the present invention relates to a weft detection device having a split type feeler head among the weft detection devices used in a water jet loom, and when reassembling the feeler head for maintenance work, Another object of the present invention is to provide a weft detection device capable of easily matching the optical axis of the light projecting unit and the optical axis of the light receiving unit.

前記の課題の下に、本発明は、水噴射式織機用に用いられる緯糸検知装置（１）を次のように構成した。すなわち、本発明の緯糸検知装置（１）は、反給糸側に設けられ、筬打ち動作にともなって移動する緯糸（２０）を受け入れるスリット（３）が形成されたフィーラヘッド（２）を有し、前記フィーラヘッド（２）は、前記スリット（３）を挟んで光軸（６）を一致させて対向する投光部（４）と受光部（５）とを有し、前記光軸（６）を通過する緯糸（２０）の有無を検知して緯入れの成否を判定する。 Under the above-mentioned problems, the present invention has the following configuration of the weft detection device (1) used for the water jet loom. That is, the weft detection device (1) of the present invention has a feeler head (2) provided with a slit (3) that is provided on the side opposite to the yarn feeding side and that accepts the weft (20) that moves in accordance with the beating operation. The feeler head (2) includes a light projecting section (4) and a light receiving section (5) facing each other with the optical axis (6) aligned with the slit (3) interposed therebetween. 6) The presence / absence of the weft insertion is determined by detecting the presence or absence of the weft (20) passing through.

前記フィーラヘッド（２）は、前記投光部（４）を有する第１のヘッド部材（７）と、前記受光部（５）を有する第２のヘッド部材（８）と、前記第１及び第２のヘッド部材（７，８）を支持するサポート部材（９）と、該サポート部材（９）に対する前記第１及び第２のヘッド部材（７，８）の少なくとも一方の、前記光軸（６）と直交する方向における位置を規制する位置決め機構（１０）とを備える。 The feeler head (2) includes a first head member (7) having the light projecting portion (4), a second head member (8) having the light receiving portion (5), the first and first head members. A support member (9) for supporting the two head members (7, 8), and the optical axis (6) of at least one of the first and second head members (7, 8) with respect to the support member (9). ) And a positioning mechanism (10) that regulates a position in a direction orthogonal to.

そして、前記位置決め機構（１０）は、前記第１及び第２のヘッド部材（７，８）の少なくとも一方に、互いに逆方向を向くように形成された２つの第１の規制面であって、前記光軸（６）と平行に延在すると共にヘッド部材の幅方向と平行に形成された第１の規制面（７ａ，８ａ）、及び該第１の規制面（７ａ，８ａ）のそれぞれと当接するように前記サポート部材（９）に形成された２つの第１の当接面（９４ａ）と、前記第１の規制面（７ａ，８ａ）が形成された前記第１のヘッド部材（７）及び／又は前記第２のヘッド部材（８）に形成される第２の規制面（７５ａ，８５ａ）であって、前記光軸（６）と平行に延在すると共に前記第１の規制面（７ａ，８ａ）と直交し、且つ前記サポート部材（９）と対面するように形成された１つの第２の規制面（７５ａ，８５ａ）、及び該第２の規制面（７５ａ，８５ａ）と当接するように前記サポート部材（９）に形成された１つの第２の当接面（９４ｂ）と、前記第２の規制面（７５ａ，８５ａ）と第２の当接面（９４ｂ）との当接状態を維持するための固定部材（１３）とを含んでいる。
The positioning mechanism (10) includes two first restriction surfaces formed on at least one of the first and second head members (7, 8) so as to face opposite directions. the first regulating surface which is parallel to the width direction of the head member together extend parallel to the optical axis (6) (7a, 8a) , and the first restricting surface (7a, 8a) of the respective The first head member (7 ) formed with the two first abutting surfaces (94a) formed on the support member (9) so as to abut and the first restricting surfaces (7a, 8a). ) And / or a second restricting surface (75a, 85a) formed on the second head member (8), extending in parallel with the optical axis (6) and the first restricting surface. 1 formed so as to be orthogonal to (7a, 8a) and to face the support member (9) Two second restricting surfaces (75a, 85a) and one second abutting surface (94b) formed on the support member (9) so as to abut against the second restricting surfaces (75a, 85a ). And a fixing member (13) for maintaining a contact state between the second restriction surface (75a, 85a) and the second contact surface (94b).

なお、光軸（６）と直交する方向の例としては、ヘッド部材の長手方向及び幅方向が考えられる。
In addition, as an example of the direction orthogonal to the optical axis (6), the longitudinal direction and the width direction of the head member can be considered.

また、前記第１の当接面（９４ａ）を、その長手方向の寸法において前記第１の規制面（７ａ，８ａ）よりも長く形成してもよい。
Further, the first abutment surface (94a), said at its longitudinal dimension first restricting surface (7a, 8a) may be longer than.

さらに、前記第１の規制面（７ａ，８ａ）及び前記第１の当接面（９４ａ）のうちの一方は、前記光軸（６）と平行に形成される凸状レール（１１）の両側面であり、前記第１の規制面（７ａ，８ａ）及び前記第１の当接面（９４ａ）のうちの他方は、前記光軸（６）と平行に形成されるとともに前記凸状レール（１１）に嵌まる凹状溝（１２）の両側面であり、前記固定部材（１３）は、該凹状溝（１２）が形成された前記第１のヘッド部材（７）、前記第２のヘッド部材（８）及び前記サポート部材（９）の少なくとも一つを前記凸状レール（１１）上の任意の位置で固定する部材であるように、前記位置決め機構（１０）を構成しても良い。 Further, one of the first restriction surfaces (7a, 8a) and the first contact surface (94a) is on both sides of the convex rail (11) formed in parallel with the optical axis (6). The other of the first restricting surfaces (7a, 8a) and the first contact surface (94a) is formed in parallel with the optical axis (6) and the convex rail ( 11) are both side surfaces of the concave groove (12) that fits in, and the fixing member (13) includes the first head member (7) and the second head member in which the concave groove (12) is formed. The positioning mechanism (10) may be configured so as to be a member that fixes at least one of (8) and the support member (9) at an arbitrary position on the convex rail (11).

緯糸検知装置（１）のフィーラヘッド（２）を、投光部（４）を有する第１のヘッド部材（７）と、受光部（５）を有する第２のヘッド部材（８）と、第１及び第２のヘッド部材（７，８）を支持するサポート部材（９）とを有するように構成し、第１のヘッド部材（７）及び第２のヘッド部材（８）の少なくとも一方を位置決め機構（１０）によって光軸（６）と直交する２方向において位置決めし、かつ固定部材（１３）によって位置決めされた状態が維持されるようにサポート部材（９）に取り付けたから、投光部（４）及び受光部（５）の検知面に付着した汚れの目視による確認、及び検知面の清掃等のメンテナンス作業を容易としつつ、メンテナンス作業のためにフィーラヘッド（２）を分解した後、再び組み立てる際に、投光部（４）の光軸と受光部（５）の光軸とを容易に一致させることができる。このため、メンテナンス作業の前後において、投光部（４）と受光部（５）との対向状態を容易に同じ状態とすることができ、メンテナンス後に改めて光軸の調整やゲイン等の調整を行う必要が無くなる。 The feeler head (2) of the weft detection device (1) includes a first head member (7) having a light projecting part (4), a second head member (8) having a light receiving part (5), And a support member (9) for supporting the first and second head members (7, 8), and positioning at least one of the first head member (7) and the second head member (8). Since the mechanism (10) is positioned in two directions orthogonal to the optical axis (6) and is attached to the support member (9) so as to maintain the state of being positioned by the fixing member (13), the light projecting portion (4 ) And visual recognition of dirt adhering to the detection surface of the light receiving unit (5), and maintenance work such as cleaning of the detection surface is facilitated, and the feeler head (2) is disassembled for maintenance work and then reassembled. When the floodlight The optical axis and the light receiving portion 4) and the optical axis (5) can be easily matched. For this reason, before and after the maintenance work, the facing state of the light projecting unit (4) and the light receiving unit (5) can be easily made the same, and the adjustment of the optical axis, the gain, etc. is performed again after the maintenance. There is no need.

また、第１及び第２のヘッド部材（７，８）の少なくとも一方を、位置決め機構（１０）により投光部（４）と受光部（５）の光軸（６）を一致させながら光軸方向に移動自在に前記サポート部材（９）に対し取り付けたので、光軸（６）を一致させたまま緯糸に応じてスリット幅を調整することができる。したがって、スリット幅が固定のフィーラヘッドは検知できる糸種が限定されていたのに対し、本発明のフィーラヘッド（２）は、各種の糸に対応してスリット幅を調整することにより異なる太さの糸の緯糸を検知できる。具体的には、細い糸の場合には、スリット幅を小さくして検知精度を高めることができ、また、太い糸を検知する場合には、スリット幅を大きくして太い糸のスリット通過を許容すればよい。 Further, the optical axis of at least one of the first and second head members (7, 8) is made to coincide with the optical axis (6) of the light projecting part (4) and the light receiving part (5) by the positioning mechanism (10). Since it is attached to the support member (9) so as to be movable in the direction, the slit width can be adjusted in accordance with the weft while keeping the optical axis (6) coincident. Therefore, while the feeler head with a fixed slit width has a limited yarn type that can be detected, the feeler head (2) of the present invention has different thicknesses by adjusting the slit width corresponding to various yarns. Can be detected. Specifically, in the case of a thin thread, the slit width can be reduced to increase the detection accuracy. In the case of detecting a thick thread, the slit width is increased to allow the passage of a thick thread through the slit. do it.

本発明の一実施例における緯糸検知装置とその周辺構造の概要を示す斜視図である。It is a perspective view which shows the outline | summary of the weft detection apparatus in one Example of this invention, and its periphery structure. 本発明の一実施例における緯糸検知装置のフィーラヘッドの分解斜視図である。It is a disassembled perspective view of the feeler head of the weft detection apparatus in one Example of this invention. 本発明の一実施例における緯糸検知装置のフィーラヘッドの一部断面側面図（ａ）、及びスリット周辺の部分拡大断面図（ｂ）である。It is the partial cross section side view (a) of the feeler head of the weft detection apparatus in one Example of this invention, and the partial expanded sectional view (b) around a slit. 図３（ａ）におけるＡ−Ａ断面図である。It is AA sectional drawing in Fig.3 (a). 位置決め機構１０の各実施態様を示す部分拡大断面図である。2 is a partially enlarged cross-sectional view showing each embodiment of a positioning mechanism 10. FIG.

図１は、水噴射式織機に取り付けられた本発明の緯糸検知装置１の一実施例を示している。図１では、織機の織幅方向に延在する筬２４等の反給糸側を拡大して示しており、緯糸検知装置１は、織機の反給糸側において、織前２２の延長線上の織端近傍に配置されている。 FIG. 1 shows an embodiment of the weft detection device 1 of the present invention attached to a water jet loom. FIG. 1 shows an enlarged view of a yarn feeding side such as a reed 24 that extends in the weaving width direction of the loom. It is arranged near the end of the weave.

本実施例の緯糸検知装置１は、光ファイバ式光電センサの投受光用の光ファイバを内蔵したフィーラヘッド２と、前記センサのアンプユニット３０と、アンプユニット３０の出力信号を処理する信号処理回路３１とを有している。フィーラヘッド２は、第１のヘッド部材７と、第２のヘッド部材８と、第１及び第２のヘッド部材７，８を支持するサポート部材９とを備えており、第１、第２のヘッド部材７，８は間隔を置いてサポート部材９に対し固定部材１３によって固定され、筬２４側に開口するスリット３を形成している。なお、スリット３の幅は、緯糸２０の糸径よりも大きく、緯糸２０は、スリット３の間を通り抜けられるようになっている。固定部材１３は、具体的には固定ねじ１３ａ、保持ワッシャ１３ｂ及び図示しないナットにより構成されており、固定ねじ１３ａを緩めることにより、第１のヘッド部材７及び第２のヘッド部材８はサポート部材９から容易に取り外すことができるようになっている。 The weft detection device 1 of the present embodiment includes a feeler head 2 including an optical fiber for light projection and reception of an optical fiber type photoelectric sensor, an amplifier unit 30 of the sensor, and a signal processing circuit for processing an output signal of the amplifier unit 30. 31. The feeler head 2 includes a first head member 7, a second head member 8, and a support member 9 that supports the first and second head members 7, 8. The head members 7 and 8 are fixed to the support member 9 by a fixing member 13 at an interval to form a slit 3 that opens to the flange 24 side. The width of the slit 3 is larger than the thread diameter of the weft 20 so that the weft 20 can pass between the slits 3. Specifically, the fixing member 13 includes a fixing screw 13a, a holding washer 13b, and a nut (not shown). By loosening the fixing screw 13a, the first head member 7 and the second head member 8 are support members. 9 can be easily removed.

サポート部材９は取付孔９１を利用して図示しないステー等により図示しない織機のフレーム等に固定されている。第１のヘッド部材７には前記センサの投光側の光ファイバ４ａが内蔵されており、また第２のヘッド部材８には前記センサの受光側の光ファイバ５ａが内蔵されている。光ファイバ４ａの先端と、光ファイバ５ａの先端とは、スリット３を挟んで光軸６を一致させて対向しており、光ファイバ４ａの先端は投光部４として機能し、光ファイバ５ａの先端は受光部５として機能する。なお、特許文献２のように、投光部としての発光ダイオード及び受光部としてのフォトトランジスタをそれぞれ第１のヘッド部材７及び第２のヘッド部材８に直接内蔵し、それらをスリット３を挟んで対向させてもよい。また、投光部４、受光部５すなわち光ファイバ４ａ、光ファイバ５ａの上下関係は、図示した例と逆であってもよい。 The support member 9 is fixed to a frame or the like of a loom (not shown) by a stay (not shown) using an attachment hole 91. The first head member 7 incorporates an optical fiber 4a on the light projecting side of the sensor, and the second head member 8 incorporates an optical fiber 5a on the light receiving side of the sensor. The distal end of the optical fiber 4a and the distal end of the optical fiber 5a are opposed to each other with the optical axis 6 aligned with the slit 3 interposed therebetween, and the distal end of the optical fiber 4a functions as the light projecting unit 4. The tip functions as the light receiving unit 5. As in Patent Document 2, a light emitting diode as a light projecting unit and a phototransistor as a light receiving unit are directly built in the first head member 7 and the second head member 8, respectively, and they are sandwiched by the slit 3. You may make it oppose. Further, the vertical relationship of the light projecting unit 4, the light receiving unit 5, that is, the optical fiber 4a, and the optical fiber 5a may be opposite to the illustrated example.

光ファイバ４ａ，５ａは、フィーラヘッド２内で合流して一本のファイバケーブル１４としてフィーラヘッド２の外部へ引き出されている。引き出されたファイバケーブル１４の他端はアンプユニット３０に接続されている。 The optical fibers 4 a and 5 a are merged in the feeler head 2 and drawn out of the feeler head 2 as a single fiber cable 14. The other end of the drawn fiber cable 14 is connected to the amplifier unit 30.

アンプユニット３０は、図示しないが、投光素子としての発光ダイオード、投光素子を駆動する投光回路、受光素子としてのフォトトランジスタ、受光素子からの出力を増幅する増幅回路、増幅回路の出力に基づいて入光及び遮光の２値の出力信号を出す出力回路等を備えている。アンプユニット３０が発生させた光は、光ファイバ４ａを通じて光ファイバ４ａの先端（投光部４）からスリット３へ投光され、光ファイバ５ａの先端（受光部５）に入射し、スリット３間に光軸６を形成する。このように、本実施例の緯糸検知装置１は、透過型の光電センサとして構成され、緯糸検知装置１は、緯糸２０が光軸６をさえぎることで緯糸２０を検知する。 Although not shown, the amplifier unit 30 includes a light emitting diode as a light projecting element, a light projecting circuit that drives the light projecting element, a phototransistor as a light receiving element, an amplifier circuit that amplifies the output from the light receiving element, and an output of the amplifier circuit. Based on this, an output circuit for outputting a binary output signal of incident light and light shielding is provided. The light generated by the amplifier unit 30 is projected from the tip of the optical fiber 4 a (light projecting unit 4) to the slit 3 through the optical fiber 4 a and is incident on the tip of the optical fiber 5 a (light receiving unit 5). The optical axis 6 is formed in Thus, the weft detection device 1 of the present embodiment is configured as a transmissive photoelectric sensor, and the weft detection device 1 detects the weft 20 when the weft 20 interrupts the optical axis 6.

アンプユニット３０の出力信号を処理する信号処理回路３１は、緯入れ後の所定時間内に緯糸２０によって光軸６が遮光された場合、緯入れは正常と判断する。一方、緯入れ後所定時間経過しても緯糸２０によって光軸６が遮光されなかった場合、緯入れ不良と判断する。 The signal processing circuit 31 that processes the output signal of the amplifier unit 30 determines that weft insertion is normal when the optical axis 6 is shielded by the weft 20 within a predetermined time after weft insertion. On the other hand, if the optical axis 6 is not shielded by the weft 20 even after a predetermined time has elapsed after weft insertion, it is determined that the weft insertion is defective.

給糸側に設けられた緯入れノズル２３の噴射流にのって経糸２１の開口へ緯入れされた緯糸２０は、筬２４の筬打ち動作にともなって織前２２へ向けて運ばれ、筬打ちされる。この際、緯糸２０の先端部分は、筬２４と一緒に揺動するリードプレート２５により緯糸検知装置１のフィーラヘッド２のスリット３へ向けて運ばれる。 The weft 20 that is inserted into the opening of the warp 21 along the jet flow of the weft insertion nozzle 23 provided on the yarn supply side is carried toward the weaving front 22 along with the punching operation of the reed 24, and the reed Be beaten. At this time, the leading end portion of the weft 20 is conveyed toward the slit 3 of the feeler head 2 of the weft detection device 1 by the lead plate 25 that swings together with the collar 24.

リードプレート２５には、フィーラヘッド２と対向する位置に逃げ孔２５ａが形成されており、リードプレート２５が筬打ち動作により織前側へ進むにつれてフィーラヘッド２が逃げ孔２５ａに入り込むようになっている。このため、緯入れが正常に行われ、緯糸２０の先端部分が反給糸側の織端を超えて所定の位置まで到達している場合、緯糸２０の先端部分は、筬打ち動作の過程でリードプレート２５に押されてフィーラヘッド２のスリット３を通過し、投光部４と受光部５とが形成する光軸６を遮光する。緯糸２０を検知した緯糸検知装置１の信号処理回路３１は、緯入れが正常に行われたと判断し、この判断に基づき図示しない織機の主制御装置は製織を続行する。 A relief hole 25a is formed in the lead plate 25 at a position facing the feeler head 2, and the feeler head 2 enters the relief hole 25a as the lead plate 25 advances to the front side of the weave by a hammering operation. . For this reason, when the weft insertion is performed normally and the leading end portion of the weft yarn 20 has reached the predetermined position beyond the weaving end on the counter-feeding side, the leading end portion of the weft yarn 20 is in the process of beating operation. The optical axis 6 formed by the light projecting unit 4 and the light receiving unit 5 is shielded by being pushed by the lead plate 25 and passing through the slit 3 of the feeler head 2. The signal processing circuit 31 of the weft detection device 1 that has detected the weft 20 determines that the weft insertion has been performed normally, and based on this determination, the main controller of the loom (not shown) continues weaving.

一方、なんらかの理由により緯糸２０の先端部分が反給糸側の織端まで到達していない場合、筬打ち動作の過程で緯糸２０の先端部分はスリット３を通過せず、光軸６は遮光されず、緯糸検知装置１は緯糸２０を検知しない。緯糸２０を検知しなかった緯糸検知装置１の信号処理回路３１は、緯入れ不良信号を図示しない織機の主制御装置に送信し、織機の主制御装置は、織機を停止させる。 On the other hand, if for some reason the tip of the weft 20 does not reach the weave end on the counter-feeding side, the tip of the weft 20 does not pass through the slit 3 in the process of beating, and the optical axis 6 is shielded. Therefore, the weft detection device 1 does not detect the weft 20. The signal processing circuit 31 of the weft detection device 1 that has not detected the weft 20 transmits a weft insertion failure signal to a main controller of the loom (not shown), and the main controller of the loom stops the loom.

正常に緯入れされ、筬打ちされた緯糸２０は、その先端部分を複数の絡み糸２６により保持される。その後、緯糸２０の先端部分は、適当なタイミングで織布２７とフィーラヘッド２との間に設置された図示しないカッターにより絡み糸２６ごと織布２７から切り離される。 The weft yarn 20 that has been normally wefted and beaten is held at its tip by a plurality of entangled yarns 26. Thereafter, the tip portion of the weft 20 is separated from the woven fabric 27 together with the entangled yarn 26 by a cutter (not shown) installed between the woven fabric 27 and the feeler head 2 at an appropriate timing.

図２及び図３は、本実施例の緯糸検知装置１のフィーラヘッド２の詳細を示している。なお、図２では、光ファイバ４ａ，５ａの図示を省略し、またサポート部材９の一部を断面としている。また、説明の便宜上、図２に示すように方向を定める。前述したとおり、フィーラヘッド２は、主要な部材として第１のヘッド部材７、第２のヘッド部材８及びサポート部材９を有している。そして、それら部材には、サポート部材９に対する第１のヘッド部材７及び第２のヘッド部材８の取付位置を位置決めする位置決め機構１０としての凸状レール１１、凹状溝１２等が設けられている。以下、各部材について詳述する。 2 and 3 show details of the feeler head 2 of the weft detection device 1 of this embodiment. In FIG. 2, the optical fibers 4a and 5a are not shown, and a part of the support member 9 is a cross section. For convenience of explanation, the direction is determined as shown in FIG. As described above, the feeler head 2 includes the first head member 7, the second head member 8, and the support member 9 as main members. These members are provided with a convex rail 11, a concave groove 12, and the like as a positioning mechanism 10 for positioning the mounting positions of the first head member 7 and the second head member 8 with respect to the support member 9. Hereinafter, each member will be described in detail.

第１のヘッド部材及び第２のヘッド部材８は、いずれも板状の部材であり、真鍮等の錆びにくい材料で製作されている。第１のヘッド部材７と第２のヘッド部材８とは、鏡面対称の形状を有しており、前者には光電センサの投光側の光ファイバ４ａが内蔵され、後者には光電センサの受光側の光ファイバ５ａが内蔵されている。 Each of the first head member and the second head member 8 is a plate-like member, and is made of a rust-resistant material such as brass. The first head member 7 and the second head member 8 have mirror-symmetric shapes, the former includes an optical fiber 4a on the light projecting side of the photoelectric sensor, and the latter receives light from the photoelectric sensor. The optical fiber 5a on the side is built in.

なお、以下の説明では、第１のヘッド部材７及び第２のヘッド部材８のうち、第１のヘッド部材７を中心に説明するが、前述したとおり、第１のヘッド部材７と第２のヘッド部材８とは鏡面対称形状だから、特に断りの無い限り、第１のヘッド部材７の説明は第２のヘッド部材８にも当てはまる。 In the following description, the first head member 7 of the first head member 7 and the second head member 8 will be mainly described. However, as described above, the first head member 7 and the second head member 7 are the same. Since the head member 8 is mirror-symmetrical, the description of the first head member 7 also applies to the second head member 8 unless otherwise specified.

長手方向における第１のヘッド部材７の一端には、弧状部７１が形成されている。弧状部７１は、第２のヘッド部材８の弧状部８１と対向して、筬側に開口しスリット３へ通じる案内部１５を形成する。案内部１５は、筬打ち動作により織前へ向けて運ばれる緯糸２０の先端部分をスリット３へ確実に導く機能を有している。 An arc portion 71 is formed at one end of the first head member 7 in the longitudinal direction. The arc-shaped portion 71 is opposed to the arc-shaped portion 81 of the second head member 8 and forms a guide portion 15 that opens to the heel side and communicates with the slit 3. The guide portion 15 has a function of reliably guiding the leading end portion of the weft 20 that is conveyed toward the front of the weave by the beating operation to the slit 3.

弧状部７１に隣接する領域にはスリット面７２が形成されている。スリット面７２は、後述する位置決め機構１０により、第２のヘッド部材８に形成されたスリット面８２と平行に対向してスリット３を形成する。図３（ｂ）に示すとおり、スリット面７２の中央には、光ファイバ４ａの先端を固定するための光ファイバ挿入孔７３がスリット面７２に対し垂直に加工されている。そして、この光ファイバ挿入孔７３に固定された光ファイバ４ａの先端が投光部４として機能する。なお、第２のヘッド部材８の光ファイバ挿入孔８３に固定された光ファイバ５ａの先端は受光部５として機能する。 A slit surface 72 is formed in a region adjacent to the arc-shaped portion 71. The slit surface 72 is opposed to the slit surface 82 formed in the second head member 8 in parallel with the positioning mechanism 10 described later, and forms the slit 3. As shown in FIG. 3B, an optical fiber insertion hole 73 for fixing the tip of the optical fiber 4 a is machined perpendicularly to the slit surface 72 at the center of the slit surface 72. The tip of the optical fiber 4 a fixed in the optical fiber insertion hole 73 functions as the light projecting unit 4. The tip of the optical fiber 5 a fixed in the optical fiber insertion hole 83 of the second head member 8 functions as the light receiving unit 5.

光ファイバ挿入孔７３は、第１のヘッド部材７の長手方向に形成された配線穴７３ａと連通しており、配線穴７３ａは、弧状部７１と反対側の他端に開口している。先端が光ファイバ挿入孔７３に固定された光ファイバ４ａは、配線穴７３ａに配線されて配線穴７３ａの開口部から引き出され、サポート部材９の後述する配線用孔９６に通されて第２のヘッド部材８の光ファイバ５ａと合流する。合流した光ファイバ４ａ，５ａは、一本のファイバケーブル１４としてファイバ引出部９３からフィーラヘッド２の外部へ引き出され、アンプユニット３０に接続される。なお、配線穴７３ａ、配線用孔９６は光ファイバ４ａにストレスがかからないように角にアールを持たさせている。 The optical fiber insertion hole 73 communicates with a wiring hole 73 a formed in the longitudinal direction of the first head member 7, and the wiring hole 73 a opens at the other end opposite to the arcuate portion 71. The optical fiber 4a having the distal end fixed to the optical fiber insertion hole 73 is routed through the wiring hole 73a, pulled out from the opening of the wiring hole 73a, and passed through a wiring hole 96 (to be described later) of the support member 9 to be second. The optical fiber 5a of the head member 8 joins. The joined optical fibers 4 a and 5 a are drawn out from the fiber lead-out portion 93 to the outside of the feeler head 2 as a single fiber cable 14 and connected to the amplifier unit 30. The wiring holes 73a and the wiring holes 96 are rounded at the corners so that no stress is applied to the optical fiber 4a.

スリット面７２を挟んで弧状部７１と反対側の部分には、凹部７４が形成されている。凹部７４は、第２のヘッド部材８の凹部８４と対向してスリット３よりも幅の広い空間を形成する。この空間はスリット３を抜けた検知後の緯糸２０の先端部分を受け入れるとともに、前述した図示しないカッターにより織布２７から切り離された緯糸２０の先端部分がフィーラヘッド２に引っ掛かるのを防止し、切り離された緯糸２０の先端部分が速やかにフィーラヘッド２から離脱できるようにするためのものである。 A concave portion 74 is formed in a portion opposite to the arc-shaped portion 71 across the slit surface 72. The recess 74 faces the recess 84 of the second head member 8 and forms a space wider than the slit 3. This space receives the leading end portion of the weft 20 after passing through the slit 3 and prevents the leading end portion of the weft 20 separated from the woven fabric 27 by the cutter (not shown) from being caught on the feeler head 2. This is so that the tip portion of the weft 20 can be quickly detached from the feeler head 2.

弧状部７１と反対側の他端には、第１のヘッド部材７をサポート部材９に取り付けるための取付け部７５が形成されている。取付け部７５には、サポート部材９と対向する規制面７５ａが形成されており、この規制面７５ａは、位置決め機構１０の構成要素の一つである第２の規制面として機能する。 An attachment portion 75 for attaching the first head member 7 to the support member 9 is formed at the other end opposite to the arc-like portion 71. The attachment portion 75 is formed with a restriction surface 75 a that faces the support member 9, and this restriction surface 75 a functions as a second restriction surface that is one of the components of the positioning mechanism 10.

また、規制面７５ａには、サポート部材９に形成された凸状レール１１と嵌り合う凹状溝１２ａが形成されている。この凹状溝１２ａは、前述の光ファイバ挿入孔７３すなわち光軸６と平行に形成されており、溝の両側面を構成する規制面７ａは、位置決め機構１０の構成要素の一つである２つの第１の規制面として機能する。 Further, a concave groove 12a that fits with the convex rail 11 formed on the support member 9 is formed on the regulation surface 75a. The concave groove 12 a is formed in parallel with the optical fiber insertion hole 73, that is, the optical axis 6, and the regulation surfaces 7 a constituting both side surfaces of the groove are two components that are one of the components of the positioning mechanism 10. It functions as a first restriction surface.

さらに、取付け部７５には、凹状溝１２を挟んで弧状部７１と反対の側に、貫通孔７６が形成されている。この貫通孔７６には、第１のヘッド部材７をサポート部材９に取り付けるための固定ねじ１３ａが挿通される。なお、後述するが、固定ねじ１３ａも位置決め機構１０の構成要素の一つである。 Furthermore, a through hole 76 is formed in the attachment portion 75 on the side opposite to the arc-shaped portion 71 with the concave groove 12 interposed therebetween. A fixing screw 13 a for attaching the first head member 7 to the support member 9 is inserted into the through hole 76. As will be described later, the fixing screw 13a is also one of the components of the positioning mechanism 10.

次に、サポート部材９について説明する。サポート部材９は、ブロック状の部材であり、第１のヘッド部材等と同じく真鍮等の錆びにくい材料で製作されている。サポート部材９は、フィーラヘッド２全体を織機に固定するために用いられるブラケット部９２と、ファイバケーブル１４が引き出されるファイバ引出し部９３と、ブラケット部９２及びファイバ引出し部９３の基部であり、かつ第１のヘッド部材及び第２のヘッド部材８を支持するヘッド部材支持部９４とを有している。 Next, the support member 9 will be described. The support member 9 is a block-like member, and is made of a rust-resistant material such as brass, like the first head member. The support member 9 is a bracket portion 92 used for fixing the entire feeler head 2 to the loom, a fiber lead portion 93 from which the fiber cable 14 is drawn, a base portion of the bracket portion 92 and the fiber lead portion 93, and a first member. And a head member support portion 94 that supports the first head member and the second head member 8.

ブラケット部９２は、ヘッド部材支持部９４から突出する板状を呈している。ブラケット部９２には、板の厚さ方向に貫通する取付孔９１が形成されており、この取付孔９１は、前述したとおり、サポート部材９すなわちフィーラヘッド２全体を図示しないステー等を介して図示しない織機の本体に固定するために用いられる。 The bracket portion 92 has a plate shape protruding from the head member support portion 94. The bracket portion 92 is formed with an attachment hole 91 penetrating in the thickness direction of the plate. As described above, the attachment hole 91 illustrates the support member 9, that is, the feeler head 2 as a whole via a stay or the like (not shown). Used to fix to the main body of the loom.

ファイバ引出し部９３は、図３（ａ）に示すとおり、ヘッド部材支持部９４の上部から斜め上方に突出しており、ファイバーケーブル１４のコネクタ部１４ａを係止する切欠き９５が設けられている。また、ファイバ引出し部９３の先端の端面には、光ファイバ４ａ，５ａが通る配線用孔９６の一方の開口部が設けられており、配線用孔９６はファイバ引出し部９３を貫通して後述するヘッド部材支持部９４に通じている。 As shown in FIG. 3A, the fiber lead-out portion 93 protrudes obliquely upward from the upper portion of the head member support portion 94 and is provided with a notch 95 that locks the connector portion 14 a of the fiber cable 14. Further, one end of a wiring hole 96 through which the optical fibers 4a and 5a pass is provided on the end face of the tip of the fiber lead-out part 93, and the wiring hole 96 passes through the fiber lead-out part 93 and will be described later. It communicates with the head member support portion 94.

ヘッド部材支持部９４は、フィーラヘッド２を織機に取り付けた状態（図１参照）で、反給糸側から見てブラケット部９２及びファイバ引出し部９３よりも窪んだほぼ方形の当接面９４ｂを有しており、当接面９４ｂは、位置決め機構１０の構成要素の一つである第２の当接面として機能する。当接面９４ｂには、固定ねじ１３ａが挿入される取付長孔９７と、凹状溝１２に嵌まる凸状レール１１とが形成されている。凸状レール１１の両側面を構成する当接面９４ａは、位置決め機構１０の構成要素の一つである２つの第１の当接面として機能する。 The head member support portion 94 has a substantially rectangular contact surface 94b that is recessed from the bracket portion 92 and the fiber lead-out portion 93 when viewed from the counter yarn feeding side with the feeler head 2 attached to the loom (see FIG. 1). The contact surface 94 b functions as a second contact surface that is one of the components of the positioning mechanism 10. The contact surface 94b is formed with a long mounting hole 97 into which the fixing screw 13a is inserted, and a convex rail 11 that fits into the concave groove 12. The abutment surfaces 94 a that constitute both side surfaces of the convex rail 11 function as two first abutment surfaces that are one of the components of the positioning mechanism 10.

なお、図示の例では、凸状レール１１はヘッド部材支持部９４と一体成形されているが、別体の板状部材をヘッド部材支持部９４に取り付けてこれを凸状レール１１としてもよい。ヘッド部材支持部９４のファイバ引出し部９３と隣接する内壁９８には、配線用孔９６の他方の開口部が設けられている。 In the illustrated example, the convex rail 11 is integrally formed with the head member support portion 94, but a separate plate member may be attached to the head member support portion 94 and used as the convex rail 11. On the inner wall 98 adjacent to the fiber lead-out portion 93 of the head member support portion 94, the other opening portion of the wiring hole 96 is provided.

次に、第１のヘッド部材７及び第２のヘッド部材８のサポート部材９に対する位置を規制する位置決め機構１０について説明する。位置決め機構１０は、本実施例では、サポート部材９に設けられた凸状レール１１と、第１、第２のヘッド部材７，８に形成され凸状レール１１に嵌まる凹状溝１２ａ，１２ｂと、第１、第２のヘッド部材７，８を凸状レール上１１の任意の位置で固定する固定部材１３としての固定ねじ１３ａ、保持ワッシャ１３ｂ及びナット１３ｃとからなる。本実施例の位置決め機構１０は、第１のヘッド部材７及び第２のヘッド部材８のサポート部材９に対する位置を、光軸方向と直交する第１の方向としての前後方向及び光軸方向と直交する第２の方向としての幅方向において規制しつつ、光軸方向への移動を許容するように構成されている。 Next, the positioning mechanism 10 that regulates the positions of the first head member 7 and the second head member 8 relative to the support member 9 will be described. In this embodiment, the positioning mechanism 10 includes a convex rail 11 provided on the support member 9, and concave grooves 12 a and 12 b that are formed on the first and second head members 7 and 8 and fit into the convex rail 11. The first and second head members 7 and 8 include a fixing screw 13a as a fixing member 13 for fixing the first and second head members 7 and 8 at an arbitrary position on the convex rail 11, a holding washer 13b, and a nut 13c. In the positioning mechanism 10 of the present embodiment, the positions of the first head member 7 and the second head member 8 with respect to the support member 9 are orthogonal to the front-rear direction and the optical axis direction as a first direction orthogonal to the optical axis direction. It is configured to allow movement in the optical axis direction while restricting in the width direction as the second direction.

前後方向の位置規制は、サポート部材９の凸状レール１１と、第１、第２のヘッド部材７，８の凹状溝１２ａ，１２ｂとにより実現される。凸状レール１１と、凹状溝１２ａ，１２ｂとは、ガタが生じない程度に精度良く嵌まり合うように加工されており、これらを嵌め合わせて固定ねじ１３ａにより第１、第２のヘッド部材７，８をサポート部材９に取り付けることにより、サポート部材９に対する第１、第２のヘッド部材７，８の前後方向の位置は規制される。 The position restriction in the front-rear direction is realized by the convex rail 11 of the support member 9 and the concave grooves 12a and 12b of the first and second head members 7 and 8. The convex rail 11 and the concave grooves 12a and 12b are processed so as to fit with high precision to such an extent that no looseness occurs, and the first and second head members 7 are fitted together by fixing screws 13a. , 8 are attached to the support member 9, the positions of the first and second head members 7, 8 with respect to the support member 9 in the front-rear direction are regulated.

すなわち、凸状レール１１と凹状溝１２ａ，１２ｂとを嵌合した状態では、互いに対向するように形成され前後方向に対し交差する２つの第１の規制面７ａ，８ａと、互いに逆方向を向くように形成され前後方向に対し交差する２つの第１の当接面９４ａとが当接しているので、第１、第２のヘッド部材７，８がサポート部材９に対して前後方向へ移動することはなく、また、光軸方向及び前後方向を含む平面上でサポート部材９に対して斜めになることもない。したがって、位置決め機構１０により、前後方向に関して第１、第２のヘッド部材７，８をサポート部材９に対し常に同じ位置で組み付けることができ、しかも第１のヘッド部材７のスリット面７２と、第２のヘッド部材８のスリット面８２とを常に平行に対向させることができる。 That is, in a state where the convex rail 11 and the concave grooves 12a and 12b are fitted, the two first restricting surfaces 7a and 8a that are formed so as to face each other and intersect the front-rear direction are directed in opposite directions. The first and second head members 7 and 8 move in the front-rear direction with respect to the support member 9 because the two first abutment surfaces 94a that are formed as described above and intersect with the front-rear direction are in contact with each other. In addition, the support member 9 is not inclined on a plane including the optical axis direction and the front-rear direction. Therefore, the first and second head members 7 and 8 can always be assembled to the support member 9 at the same position in the front-rear direction by the positioning mechanism 10, and the slit surface 72 of the first head member 7, It is possible to always face the slit surface 82 of the second head member 8 in parallel.

一方、幅方向の位置規制は、第１、第２のヘッド部材７，８の取付部７５，８５の規制面７５ａ，８５ａと、サポート部材９のヘッド部材支持部９４の当接面９４ｂとにより実現される。当接面７５ａ，８５ａとヘッド部材支持部９４の面とは精度良く平面に仕上げられており、規制面７５ａ，８５ａをヘッド部材支持部９４の当接面９４ｂに付き当てて固定ねじ１３ａによって第１、第２のヘッド部材７，８をサポート部材９に固定することにより、サポート部材９に対する第１、第２のヘッド部材７，８の幅方向の位置は規制される。 On the other hand, the position restriction in the width direction is performed by the restriction surfaces 75a and 85a of the mounting portions 75 and 85 of the first and second head members 7 and 8, and the contact surface 94b of the head member support portion 94 of the support member 9. Realized. The contact surfaces 75a and 85a and the surface of the head member support portion 94 are finished to a flat surface with high accuracy. The restricting surfaces 75a and 85a are brought into contact with the contact surface 94b of the head member support portion 94 and fixed by the fixing screw 13a. By fixing the first and second head members 7 and 8 to the support member 9, the positions in the width direction of the first and second head members 7 and 8 with respect to the support member 9 are restricted.

すなわち、固定ねじ１３ａによって第１、第２のヘッド部材７，８をサポート部材９に固定した状態では、幅方向に対し交差する第２の規制面７５ａ，８５ａと、当接面９４ｂとが当接し、しかも、その当接状態が維持されるように固定ねじ１３ａによって第１、第２のヘッド部材７，８をヘッド部材支持部９４に押し付けているので、第１、第２のヘッド部材７，８がサポート部材９に対して幅方向へ移動することはなく、また、幅方向及び前後方向を含む平面上でサポート部材９に対して斜めになることもない。したがって、位置決め機構１０により、幅方向に関して第１、第２のヘッド部材７，８をサポート部材９に対し常に同じ位置で組み付けることができ、しかも第１のヘッド部材７と、第２のヘッド部材８を光軸方向及び前後方向を含む同一平面上に常に配置させることができる。なお、凸状レール１１の高さｈは、凹状溝１２ａ，１２ｂの深さｄよりも小さい寸法とし、第２の規制面７５ａ，８５ａと、当接面９４ｂとが確実に当接するようになっている。 That is, in a state where the first and second head members 7 and 8 are fixed to the support member 9 by the fixing screw 13a, the second restriction surfaces 75a and 85a intersecting the width direction and the contact surface 94b are in contact with each other. In addition, the first and second head members 7 and 8 are pressed against the head member support portion 94 by the fixing screw 13a so that the contact state is maintained, so the first and second head members 7 , 8 do not move in the width direction with respect to the support member 9 and do not become inclined with respect to the support member 9 on a plane including the width direction and the front-rear direction. Therefore, the first and second head members 7 and 8 can always be assembled to the support member 9 at the same position in the width direction by the positioning mechanism 10, and the first head member 7 and the second head member 8 can always be arranged on the same plane including the optical axis direction and the front-rear direction. The height h of the convex rail 11 is set to be smaller than the depth d of the concave grooves 12a and 12b, so that the second restriction surfaces 75a and 85a and the contact surface 94b come into contact with each other reliably. ing.

前述したとおり、第１、第２のヘッド部材７，８は鏡面対称構造であり、凹状溝１２ａ，１２ｂから光軸６（光ファイバ挿入孔７３，８３）までの前後方向の距離、及び規制面７５ａ，８５ａから光軸６までの幅方向の距離は同じである。しかも凹状溝１２ａ，１２ｂは光軸６と平行に形成されているから、第１、第２のヘッド部材７，８を位置決め機構１０を介してサポート部材９に取り付けることにより、投光部４としての光ファイバー４ａの先端と、受光部５としての光ファイバー５ａの先端とは常に光軸６を一致させて正確に対向した状態となる。 As described above, the first and second head members 7 and 8 have a mirror-symmetric structure, the distance in the front-rear direction from the concave grooves 12a and 12b to the optical axis 6 (optical fiber insertion holes 73 and 83), and the regulating surface. The distance in the width direction from 75a, 85a to the optical axis 6 is the same. Moreover, since the concave grooves 12 a and 12 b are formed in parallel with the optical axis 6, the first and second head members 7 and 8 are attached to the support member 9 via the positioning mechanism 10 to form the light projecting portion 4. The tip of the optical fiber 4a and the tip of the optical fiber 5a as the light receiving unit 5 are always in a state of being accurately opposed with the optical axis 6 aligned.

したがって、図示の構成よれば、サポート部材９から第１のヘッド部材７及び／又は第２のヘッド部材８を取り外した後、再びこれらを取り付けるにあたり、凸状レール１１と、凹状溝１２ａ，１２ｂとを嵌め合せ、規制面７５ａ，８５ａをヘッド部材支持部９４の当接面９４ｂに付き当てて固定ねじ１３ａにより固定すれば、容易に投光部４の光軸と受光部５の光軸とを一致させることができ、再取り付け後においても投光面４ｂと受光面５ｂとの対向状態を取り外し前と同じ状態にすることができる。 Therefore, according to the configuration shown in the figure, when the first head member 7 and / or the second head member 8 are removed from the support member 9 and then reattached, the convex rail 11 and the concave grooves 12a and 12b , And the regulating surfaces 75a and 85a are brought into contact with the contact surface 94b of the head member support portion 94 and fixed by the fixing screw 13a, so that the optical axis of the light projecting portion 4 and the optical axis of the light receiving portion 5 can be easily obtained. Even after reattachment, the opposing state of the light projecting surface 4b and the light receiving surface 5b can be made the same as before removal.

さらに、本実施例では、サポート部材９に形成された凸状レール１１の当接面９４ａ（第１の当接面）の光軸方向（長手方向）の寸法が第１、第２のヘッド部材７，８の規制面７ａ，８ａ（第１の規制面）の光軸方向の寸法の合計よりも大きく形成され、かつ、取付長孔９７が、凸状レール１１と平行な方向に寸法が大きい長孔となっているので、第１のヘッド部材７及び第２のヘッド部材８を凸状レール１１上の任意の位置で固定ねじ１３ａにより固定できる。この構成により、サポート部材９に対する第１、第２のヘッド部材７，８の光軸方向の位置を取付長孔９７の範囲で調整可能となっている。これにより、スリット面７２，８２間の間隔、すなわちスリット３の幅を、投光部４の光軸と受光部５の光軸とをずらすことなく調整することができ、製織に使用される緯糸２０の種類に応じてスリット３の幅を容易に変更することができる。 Furthermore, in the present embodiment, the first and second head members have dimensions in the optical axis direction (longitudinal direction) of the contact surface 94a (first contact surface) of the convex rail 11 formed on the support member 9. 7 and 8 are formed to be larger than the sum of the dimensions in the optical axis direction of the restriction surfaces 7a and 8a (first restriction surfaces), and the attachment long hole 97 has a large dimension in a direction parallel to the convex rail 11. Since it is a long hole, the first head member 7 and the second head member 8 can be fixed at any position on the convex rail 11 by the fixing screw 13a. With this configuration, the position of the first and second head members 7, 8 with respect to the support member 9 in the optical axis direction can be adjusted within the range of the attachment elongated hole 97. Thereby, the space between the slit surfaces 72 and 82, that is, the width of the slit 3 can be adjusted without shifting the optical axis of the light projecting unit 4 and the optical axis of the light receiving unit 5, and the weft used for weaving. The width of the slit 3 can be easily changed according to the 20 types.

なお、図示の実施例では、第１、第２のヘッド部材７，８を挟んでサポート部材９と反対側に保持ワッシャ１３ｂが存在している。固定ねじ１３ａは、保持ワッシャ１３ｂ、第１、第２のヘッド部材７，８及びサポート部材９の取付長孔９７を貫通し、図４に示すとおりその先端にナット１３ｃが螺合される。これにより、第１、第２のヘッド部材７，８とサポート部材９とは、保持ワッシャ１３ｂとナット１３ｃとにより挟まれた状態で締め付け固定される。 In the illustrated embodiment, a holding washer 13b exists on the opposite side of the support member 9 with the first and second head members 7 and 8 interposed therebetween. The fixing screw 13a passes through the holding washer 13b, the first and second head members 7, 8 and the attachment long hole 97 of the support member 9, and a nut 13c is screwed to the tip thereof as shown in FIG. Thereby, the 1st, 2nd head members 7 and 8 and the support member 9 are clamped and fixed in the state pinched by the holding washer 13b and the nut 13c.

以上、図１〜４を参照して本発明の一実施例を説明したが、本発明の実施形態は図１〜４に示したものに限られない。 As mentioned above, although one Example of this invention was described with reference to FIGS. 1-4, embodiment of this invention is not restricted to what was shown in FIGS.

図１〜４に示した実施例では、図５（ａ）に示すとおり、第１、第２のヘッド部材７，８側に第１の規制面としての凹状溝１２を形成し、サポート部材９側に第１の当接面としての凸状レール１１を形成しているが、例えば、図５（ｂ）に示すように、第１、第２のヘッド部材７，８側に第１の規制面としての凸状レール１１１を形成し、サポート部材９側に第１の当接面としての凹状溝１１２を形成してもよい。 In the embodiment shown in FIGS. 1 to 4, as shown in FIG. 5A, a concave groove 12 as a first regulating surface is formed on the first and second head members 7, 8 side, and the support member 9. The convex rail 11 as the first contact surface is formed on the side, but for example, as shown in FIG. 5B, the first restriction is formed on the first and second head members 7 and 8 side. The convex rail 111 as a surface may be formed, and the concave groove 112 as a first contact surface may be formed on the support member 9 side.

また、前述した各実施例では、凹状溝および凸状レールとして断面矩形のものを採用している。
Moreover, in each Example mentioned above, the thing of a cross section is employ | adopted as a concave groove and a convex rail .

図１〜５に示した実施例では、第１の規制面と第１の当接面（凸状レールと凹状溝）により前後方向の位置を規制している。
In the embodiment shown in FIGS. 1 to 5, the position in the front-rear direction is regulated by the first regulating surface and the first contact surface (convex rail and concave groove) .

図１〜５に示した実施例では、第１、第２のヘッド部材７，８及びサポート部材９を全て別体に形成し、両ヘッド部材が位置決め機構１０を介してサポート部材９に着脱可能に取り付けられるものとしたが、投光部４及び受光部５の検知面（投光面４ｂ，受光面５ｂ）の状態を確認、清掃するためにはいずれか一方のヘッド部材がサポート部材９から取り外せればよいため、一方のヘッド部材のみを着脱可能とし、他方のヘッド部材がサポート部材９と一体的に形成されていてもよい。
In the embodiment shown in FIGS. 1 to 5 , the first and second head members 7, 8 and the support member 9 are all formed separately, and both head members can be attached to and detached from the support member 9 via the positioning mechanism 10. In order to confirm and clean the state of the detection surfaces (light projection surface 4b and light reception surface 5b) of the light projecting unit 4 and the light receiving unit 5, either one of the head members is removed from the support member 9. Since only one head member may be detachable, the other head member may be formed integrally with the support member 9 as long as it can be removed.

また、スリット３の幅の調整、すなわちサポート部材９に対する各ヘッド部材の上下方向（光軸方向）の位置調整について、スリット３の幅は、いずれか一方のヘッド部材を上下方向に変位させれば調整できるため、一方のヘッド部材のみをサポート部材９に対し上下方向に位置調整可能とし、他方のヘッド部材については上下方向に変位不能にサポート部材９に対し組み付けられる構成としてもよい。 Further, regarding the adjustment of the width of the slit 3, that is, the position adjustment of each head member in the vertical direction (optical axis direction) with respect to the support member 9, the width of the slit 3 can be determined by displacing one of the head members in the vertical direction. Since it can be adjusted, only one head member can be vertically adjusted with respect to the support member 9, and the other head member can be assembled to the support member 9 so that it cannot be displaced vertically.

さらに、本発明においては、各ヘッド部材の上下方向の位置調整は必須ではないため、両ヘッド部材が共に上下方向に変位不能にサポート部材９に対し組み付けられる構成であってもよい。因みに、上下方向に変位不能に組み付けられる構成としては、例えば、図１〜４に示した実施例の場合でいえば、サポート部材９に形成される固定ねじ１３ａ用の取付長孔９７を長孔にせずに、丸孔にすればよい。 Further, in the present invention, since the vertical position adjustment of each head member is not essential, both head members may be assembled to the support member 9 so that they cannot be displaced in the vertical direction. For example, in the case of the embodiment shown in FIGS. 1 to 4, the attachment long hole 97 for the fixing screw 13 a formed in the support member 9 is a long hole. A round hole may be used instead.

１緯糸検知装置
２フィーラヘッド
３スリット
４投光部４ａ光ファイバ４ｂ投光面
５受光部５ａ光ファイバ５ｂ受光面
６光軸
７第１のヘッド部材
７ａ規制面７１弧状部７２スリット面
７３光ファイバ挿入孔７３ａ配線穴７４凹部
７５取付部７５ａ規制面７６貫通孔
８第２のヘッド部材
８ａ規制面８１弧状部８２スリット面
８３光ファイバ挿入孔８３ａ配線穴８４凹部
８５取付部８５ａ規制面８６貫通孔
９サポート部材
９１取付孔９２ブラケット部９３ファイバ引出部
９４ヘッド部材支持部９４ａ当接面９４ｂ当接面
９５切欠き９６配線用孔９７取付長孔
９８内壁
１０位置決め機構
１１凸状レール
１２凹状溝１２ａ凹状溝１２ｂ凹状溝
１３固定部材１３ａ固定ねじ１３ｂ保持ワッシャ１３ｃナット
１４ファイバケーブル１４ａコネクタ部
１５案内部
２０緯糸
２１経糸
２２織前
２３緯入ノズル
２４筬
２５リードプレート２５ａ逃げ孔
２６絡み糸
２７織布
３０アンプユニット
３１信号処理回路

１１１凸状レール
１１２凹状溝
２１１凸状レール
２１２凹状溝
３１１凸状レール
３１２凹状溝
DESCRIPTION OF SYMBOLS 1 Weft detection apparatus 2 Feeler head 3 Slit 4 Light projection part 4a Optical fiber 4b Light projection surface 5 Light reception part 5a Optical fiber 5b Light reception surface 6 Optical axis 7 First head member 7a Restriction surface 71 Arc-shaped part 72 Slit surface 73 Optical fiber Insertion hole 73a Wiring hole 74 Recess 75 Mounting portion 75a Restriction surface 76 Through hole 8 Second head member 8a Restriction surface 81 Arc portion 82 Slit surface 83 Optical fiber insertion hole 83a Wiring hole 84 Recess 85 Attachment portion 85a Restriction surface 86 Through hole DESCRIPTION OF SYMBOLS 9 Support member 91 Mounting hole 92 Bracket part 93 Fiber extraction part 94 Head member support part 94a Contact surface 94b Contact surface 95 Notch 96 Wiring hole 97 Installation long hole 98 Inner wall 10 Positioning mechanism 11 Convex rail 12 Concave groove 12a Concave groove 12b Concave groove 13 Fixing member 13a Fixing screw 13b Holding washer 13c Nut 14 Fiber cable 14a Connector portion 15 Guide portion 20 Weft 21 Warp 22 Weaving 23 Weft insertion nozzle 24 筬 25 Lead plate 25a Escape hole 26 Entangled yarn 27 Woven fabric 30 Amplifier unit 31 Signal processing circuit

111 Convex Rail 112 Concave Groove 211 Convex Rail 212 Concave Groove 311 Convex Rail 312 Concave Groove

Claims

A feeler head (2) provided with a slit (3) that is provided on the non-feed side and receives a weft (20) that moves in accordance with a beating operation, wherein the feeler head (2) 3) It has a light projecting part (4) and a light receiving part (5) that face each other with the optical axis (6) aligned, and detects the presence or absence of a weft (20) passing through the optical axis (6). In the weft detection device (1) for a water-jet loom that determines the success or failure of the weft insertion,
The feeler head (2) includes a first head member (7) having the light projecting portion (4), a second head member (8) having the light receiving portion (5), the first and first head members. A support member (9) for supporting the two head members (7, 8), and the optical axis (6) of at least one of the first and second head members (7, 8) with respect to the support member (9). ) And a positioning mechanism (10) for regulating the position in the direction orthogonal to
The positioning mechanism (10)
At least one of the first and second head members (7,8), a two first restricting surface formed to face opposite directions, parallel to extend to the optical axis (6) first regulating surface which is parallel to the width direction of the head member while standing (7a, 8a), and the first restricting surface (7a, 8a) each said support member to abut the (9) Two first abutment surfaces (94a) formed on
The first restricting surface (7a, 8a) said formed first head member (7) and / or said second second regulating surface that will be formed in the head member (8) (75a, 85a) a is, the first restriction surface (7a, 8a) together extend parallel to said optical axis (6) and perpendicular, and the support member (9) and the one that is formed so as to face the Two regulating surfaces (75a, 85a) and one second abutting surface (94b) formed on the support member (9) so as to abut against the second regulating surfaces (75a, 85a),
A fixing member (13) for maintaining a contact state between the second restriction surface (75a, 85a) and the second contact surface (94b);
A weft detection device (1) for a water jet loom characterized by comprising:

2. The water injection type according to claim 1, wherein the first contact surface (94 a) is formed to be longer than the first restriction surface (7 a, 8 a) in the longitudinal dimension thereof. Weft detection device for loom (1).

One of the first restriction surfaces (7a, 8a) and the first contact surface (94a) is on both side surfaces of the convex rail (11) formed in parallel with the optical axis (6). Yes,
The other of the first restricting surfaces (7a, 8a) and the first contact surface (94a) is formed in parallel with the optical axis (6) and fitted into the convex rail (11). On both sides of the full concave groove (12),
The fixing member (13) includes at least one of the first head member (7), the second head member (8), and the support member (9) in which the concave groove (12) is formed. It is a member fixed at an arbitrary position on the convex rail (11).
The weft detection device (1) for a water jet loom according to claim 2, characterized in that