JP2009007694A

JP2009007694A - Weft insertion nozzle and weft thread nozzle prevention member used for weft insertion nozzle

Info

Publication number: JP2009007694A
Application number: JP2007169149A
Authority: JP
Inventors: Koji Yamamura; 浩二山村; Hideki Banba; 秀樹伴場; Kenchu Ko; 建忠顧
Original assignee: Tsudakoma Shanghai Co Ltd; Tsudakoma Corp; Tsudakoma Industrial Co Ltd
Current assignee: Tsudakoma Shanghai Co Ltd; Tsudakoma Corp
Priority date: 2007-06-27
Filing date: 2007-06-27
Publication date: 2009-01-15
Also published as: EP2014808B1; CN101358405B; EP2014808A2; CN101358405A; DE602008006131D1; EP2014808A3

Abstract

【課題】流体噴射式織機に用いられる緯入れノズルにおいて、緯入れの安定性、緯糸品質を損なうことなく、簡単な機構で、緯糸切断時の緯糸のノズル抜けを防止する。
【解決手段】貫通孔（５０ａ）を有し少なくとも軸方向の一端側が筒状に設けられた円筒状部（５５ａ）を有する筒状部材（５１ａ）を前記スレッドガイド（３）の内側および外側のうちいずれか一方に嵌まり合うように配置し、前記筒状部材（５１ａ）およびスレッドガイド（３）のうち内周面が実質的に緯糸導入路（５）を構成する部材の緯入れ方向下流側先端に、基端（１５）より先端側に進むにつれて先細り状に設けられる突起（１１）を円周方向に複数設ける。
【選択図】図３In a weft insertion nozzle used in a fluid jet loom, the weft insertion nozzle is prevented when the weft is cut by a simple mechanism without impairing the weft insertion stability and the weft quality.
A cylindrical member (51a) having a cylindrical portion (55a) having a through-hole (50a) and having at least one axial end in a cylindrical shape is provided inside and outside the thread guide (3). Of the cylindrical member (51a) and the thread guide (3), the inner peripheral surface of the cylindrical member (51a) and the thread guide (3) is arranged downstream of the member in the weft insertion direction. A plurality of protrusions (11) are provided in the circumferential direction on the side distal end so as to be tapered toward the distal end side from the proximal end (15).
[Selection] Figure 3

Description

本発明は、流体噴射式織機の緯入れノズルに関するものであり、より詳しくは、緯糸切断時の反発によって緯糸が緯入れノズルから抜けるという不都合（いわゆるノズル抜け）を防止する技術に関する。 The present invention relates to a weft insertion nozzle for a fluid jet loom, and more particularly to a technique for preventing inconvenience (so-called nozzle omission) that a weft thread comes off from the weft insertion nozzle due to repulsion when wefts are cut.

特許文献１、２は、流体噴射式織機で、筬打ち後の緯糸のノズル抜けを防止する手段を開示している。 Patent Documents 1 and 2 disclose means for preventing the weft thread from coming out of the nozzle after beating in a fluid jet loom.

より具体的には、特許文献１の技術は、複数のテグスや金属線などの線状部材を、緯入れノズルの噴射口の周りに圧縮流体の流れ方向の下流側で収束するように緯入れノズルに埋め込むことにより緯糸が線状部材に常に接する状態とし、筬打ち後の緯糸切断時の反発によって、織布から切り離された緯糸が緯入れ方向と逆方向に戻ろうとしても、線状部材に引っ掛かることにより、緯糸の戻りを防止している。 More specifically, in the technique of Patent Document 1, a plurality of linear members such as tegs and metal wires are inserted so as to converge around the injection port of the weft insertion nozzle on the downstream side in the flow direction of the compressed fluid. Even if the weft is always in contact with the linear member by embedding in the nozzle and the weft separated from the woven fabric returns to the direction opposite to the weft insertion direction due to repulsion when the weft is cut after beating, the linear member The weft is prevented from returning by being hooked on.

しかし、特許文献１の技術によると、緯糸が常に線状部材に接触する状態にあるため、緯入れが不安定になったり、緯糸を傷つけるなどの問題がある。 However, according to the technique of Patent Document 1, since the weft is always in contact with the linear member, there is a problem that the weft insertion becomes unstable or the weft is damaged.

一方、特許文献２の技術は、緯入れノズルの内部でスレットガイドよりも上流側に空気噴射による緯糸保持機構を設けている。この緯糸保持機構は、糸ガイドとノズル本体とを連結する基体に設けられ、前記糸ガイドと前記ノズル本体との間の位置に、緯糸の経路を挟むように対向して配置される空気噴射孔と、前記基体の内壁面を貫通する複数の貫通孔が設けられた緯糸保持部とを有し、所定のタイミングで空気噴射口から空気を噴射させて、緯糸を緯糸保持部に押し付けて保持することにより、緯糸切断時の緯糸の戻りを防止している。 On the other hand, in the technique of Patent Document 2, a weft holding mechanism by air injection is provided upstream of the thread guide inside the weft insertion nozzle. The weft holding mechanism is provided on a base body that connects the yarn guide and the nozzle main body, and is disposed at a position between the yarn guide and the nozzle main body so as to face each other so as to sandwich the weft path. And a weft holding portion provided with a plurality of through holes penetrating the inner wall surface of the base, and air is injected from the air injection port at a predetermined timing to hold the weft against the weft holding portion. This prevents the weft from returning when the weft is cut.

しかし、特許文献２の技術によると、空気噴射を制御する機構を備えなければならず、構成が複雑であり、また、風綿が貫通孔に溜ると緯糸保持が機能しなくなるため、定期的な清掃が必要となる等の問題がある。
実開昭５１−１２４１５９号公報特開平１１−２００１９３号公報 However, according to the technique of Patent Document 2, a mechanism for controlling air injection must be provided, the configuration is complicated, and when the fluff is accumulated in the through hole, the weft holding function is not functioned. There are problems such as the need for cleaning.
Japanese Utility Model Publication No. 51-124159 JP-A-11-200193

したがって、本発明の課題は、流体噴射式織機に用いられる緯入れノズルで、仮に伸縮性の強い緯糸が使用されたとしても、緯入れの安定性、緯糸品質を損なうことなく、簡単な機構で、緯糸切断時の緯糸のノズル抜けを防止することである。 Accordingly, an object of the present invention is to provide a simple mechanism without impairing the stability of the weft insertion and the quality of the weft, even if a highly flexible weft is used in the weft insertion nozzle used in the fluid jet loom. This is to prevent the weft nozzle from dropping when the weft is cut.

上記の課題のもとに、請求項１の発明は、貫通孔（５０ａ、５０ｂ、５０ｃ、５０ｄ、５０ｅ）を有し少なくとも軸方向の一端側が筒状に設けられた円筒状部（５５ａ、５５ｂ、５５ｃ、５５ｄ、５５ｅ）を有する筒状部材（５１ａ、５１ｂ、５１ｃ、５１ｄ、５１ｅ）を前記スレッドガイド（３）の内側および外側のうちいずれか一方に嵌まり合うように配置し、前記筒状部材（５１ａ、５１ｂ、５１ｃ、５１ｄ、５１ｅ）が配置される領域において、前記筒状部材（５１ａ、５１ｂ、５１ｃ、５１ｄ、５１ｅ）およびスレッドガイド（３）のうち内周面が実質的に緯糸導入路（５）を構成する部材の緯入れ方向下流側先端に、基端（１５）より先端側に進むにつれて先細り状に設けられる突起（１１）を円周方向に複数設けている。 Based on the above problems, the invention of claim 1 is a cylindrical portion (55a, 55b) having a through hole (50a, 50b, 50c, 50d, 50e) and having at least one axial end in a cylindrical shape. , 55c, 55d, 55e) are arranged so as to be fitted to either the inner side or the outer side of the thread guide (3), and the cylindrical member (51a, 51b, 51c, 51d, 51e) In the region where the cylindrical members (51a, 51b, 51c, 51d, 51e) are arranged, the inner peripheral surface of the cylindrical member (51a, 51b, 51c, 51d, 51e) and the thread guide (3) is substantially A plurality of protrusions (11) are provided in the circumferential direction at the distal end on the downstream side in the weft insertion direction of the member constituting the weft introduction path (5) in the circumferential direction, which is provided in a tapered shape as it proceeds from the proximal end (15) to the distal end side.

請求項１記載の緯入れノズル（１）について、具体的には、前記筒状部材（５１ａ、５１ｅ）を前記スレッドガイド（３）の先端部（１０）の内側および外側のうちいずれか一方に嵌まり合うように配置することによりスレッドガイド（３）の先端部（１０）を半径方向に二重構造とし、前記スレッドガイド（３）の先端部（１０）および前記筒状部材（５１ａ、５１ｅ）のうち内側にある部材の緯入れ方向下流側先端に、前記突起（１１）を円周方向に複数設けている。(請求項２の発明) In the weft insertion nozzle (1) according to claim 1, specifically, the cylindrical member (51a, 51e) is placed on either the inside or the outside of the tip portion (10) of the thread guide (3). The tip end (10) of the thread guide (3) has a double structure in the radial direction by being arranged so as to be fitted, and the tip end (10) of the thread guide (3) and the cylindrical members (51a, 51e). ), A plurality of the protrusions (11) are provided in the circumferential direction at the distal end on the downstream side in the weft insertion direction. (Invention of Claim 2)

請求項２記載の緯入れノズル（１）について、前記突起（１１）の基端（１５）を、スレッドガイド（３）の先端部（１０）および筒状部材（５１ａ、５１ｅ）のうち外側にある部材の緯入れ方向下流側の端面（５２）より上流側に位置させるようにしてもよい。(請求項３の発明) The weft insertion nozzle (1) according to claim 2, wherein the base end (15) of the projection (11) is located outside the tip end portion (10) of the thread guide (3) and the cylindrical members (51a, 51e). You may make it locate in the upstream from the end surface (52) of the downstream in the weft insertion direction of a certain member. (Invention of Claim 3)

請求項２または請求項３記載の緯入れノズル（１）について、前記スレッドガイド（３）の先端部（１０）に段部（５６ａ、５６ｅ）を形成して薄肉部を構成するとともに、前記筒状部材（５１ａ、５１ｅ）を前記段部（５６ａ、５６ｅ）に嵌まり合うように配置してもよい。(請求項４の発明) The weft insertion nozzle (1) according to claim 2 or 3, wherein a step portion (56a, 56e) is formed at a tip portion (10) of the thread guide (3) to form a thin portion, and the tube The shaped members (51a, 51e) may be arranged so as to fit into the step portions (56a, 56e). (Invention of Claim 4)

また請求項１記載の緯入れノズル（１）について、具体的には、前記筒状部材（５１ｂ、５１ｃ、５１ｄ）をスレッドガイド（３）の内側に嵌まり合うように配置し、前記筒状部材（５１ｂ、５１ｃ、５１ｄ）の緯入れ方向下流側先端に、前記突起（１１）を円周方向に複数設けている。(請求項５の発明) Further, in the weft insertion nozzle (1) according to claim 1, specifically, the tubular members (51b, 51c, 51d) are arranged so as to fit inside the thread guide (3), and the tubular shape A plurality of the protrusions (11) are provided in the circumferential direction at the downstream end in the weft insertion direction of the members (51b, 51c, 51d). (Invention of Claim 5)

請求項２または請求項５記載の緯入れノズル（１）について、前記筒状部材（５１ａ、５１ｂ、５１ｃ、５１ｄ）を、軸方向の全長にわたり、同一内径の貫通孔（５０ａ、５０ｂ、５０ｃ、５０ｄ）と、同一外径の外形とを有する円筒状に形成している。(請求項６の発明) The weft insertion nozzle (1) according to claim 2 or 5, wherein the cylindrical members (51a, 51b, 51c, 51d) are formed in through-holes (50a, 50b, 50c, 50d) and an outer shape with the same outer diameter. (Invention of Claim 6)

請求項５記載の緯入れノズル（１）について、前記筒状部材（５１ｃ、５１ｄ）に前記円筒状部（５５ｃ、５５ｄ）よりも緯入れ方向上流側に前記円筒状部（５５ｃ、５５ｄ）に連なるフランジ部（５７ｃ、５７ｄ）を形成し、前記筒状部材（５１ｃ、５１ｄ）を、前記スレッドガイド（３）に設けられた半径方向外側に向かって延びる底面（５４ｃ、５４ｄ）に、前記フランジ部（５７ｃ、５７ｄ）の緯入れ方向下流側の端面を当接するように配置してもよい。(請求項７の発明) The weft insertion nozzle (1) according to claim 5, wherein the cylindrical members (51c, 51d) are arranged on the cylindrical portions (55c, 55d) upstream of the cylindrical portions (55c, 55d) in the weft insertion direction. Consecutive flange portions (57c, 57d) are formed, and the cylindrical members (51c, 51d) are placed on the bottom surfaces (54c, 54d) extending outward in the radial direction provided in the thread guide (3). You may arrange | position so that the end surface of the weft insertion direction downstream side of a part (57c, 57d) may contact | abut. (Invention of Claim 7)

請求項８の発明は、緯入れノズル（１）のスレッドガイド（３）の内側に嵌まり合うように配置して用いられるノズル抜け防止部材（５３）を、筒状部材（５１ａ、５１ｂ、５１ｃ、５１ｄ）として構成するものであり、より具体的には、前記筒状部材（５１ａ、５１ｂ、５１ｃ、５１ｄ）は、軸方向に貫通する貫通孔（５０ａ、５０ｂ、５０ｃ、５０ｄ）と、少なくとも軸方向の一端側が軸方向に同一の外径の円筒状部（５５ａ、５５ｂ、５５ｃ、５５ｄ）とを有しており、円筒状部（５５ａ、５５ｂ、５５ｃ、５５ｄ）の先端には、基端（１５）より先端側に進むにつれて先細り状に設けられる突起（１１）が円周方向に複数設けられる。 According to the eighth aspect of the invention, the nozzle omission prevention member (53) used so as to be fitted inside the thread guide (3) of the weft insertion nozzle (1) is used as the cylindrical member (51a, 51b, 51c). 51d), and more specifically, the cylindrical members (51a, 51b, 51c, 51d) include at least through-holes (50a, 50b, 50c, 50d) penetrating in the axial direction, One end side in the axial direction has a cylindrical portion (55a, 55b, 55c, 55d) having the same outer diameter in the axial direction, and the tip of the cylindrical portion (55a, 55b, 55c, 55d) A plurality of protrusions (11) provided in a tapered shape are provided in the circumferential direction as proceeding from the end (15) toward the tip side.

請求項１の発明によれば、筒状部材（５１ａ、５１ｂ、５１ｃ、５１ｄ、５１ｅ）およびスレッドガイド（３）のうち内周面が実質的に緯糸導入路（５）を構成する部材の緯入れ方向下流側先端に、基端（１５）より先端側に進むにつれて先細り状に設けられる突起（１１）を円周方向に複数設けたから、筬打ち後の緯糸（９）の切断時に、切り離された緯入れノズル側の緯糸（９）が自ら有する弾性によって緯入れノズル（１）の上流側に向かって引き戻し方向に移動したとしても、緯糸（９）が前記複数の突起（１１）によって画定される溝部（４１）、すなわち隣接される突起（１１）の側部（１６）と基端（１５）とで画定され基端側に進むにつれて先細り状の溝部（４１）に確実に引っ掛かかることになり、緯糸（９）のさらなる移動を阻止でき、いわゆる緯糸（９）のノズル抜けを防止できる。しかも、特許文献１の技術のように、引き戻し阻止のための部材が緯糸走行経路側に突出して緯糸（９）に常に接触するものではなく、本請求項の発明の緯糸（９）の引戻しを阻止する構成として、上記複数の突起（１１）が、スレッドガイド（３）の先端側（軸方向）に向けて突出するように設けられているため、緯入れ時には、流体噴射によって引出される緯糸（９）に対して抵抗力を生じず、緯糸（９）にダメージを与えずに済む。 According to the invention of claim 1, the weft of the member whose inner peripheral surface substantially constitutes the weft introduction path (5) among the cylindrical member (51a, 51b, 51c, 51d, 51e) and the thread guide (3). Since a plurality of protrusions (11) are provided in the circumferential direction at the distal end on the downstream side in the inserting direction so as to be tapered toward the distal end side from the proximal end (15), the projections are separated when the weft (9) after beating is cut. Even if the weft thread (9) on the weft insertion nozzle side moves in the retracting direction toward the upstream side of the weft insertion nozzle (1) due to its own elasticity, the weft thread (9) is defined by the plurality of protrusions (11). The groove portion (41), that is, the groove portion (41) which is defined by the side portion (16) and the base end (15) of the adjacent projection (11) and is surely hooked to the tapered groove portion (41) as it goes to the base end side. Of the weft (9) Dynamic possible blocking can be prevented missing nozzles of the so-called weft (9). Moreover, unlike the technique of Patent Document 1, the member for preventing pullback does not protrude toward the weft running path side and does not always come in contact with the weft (9), and the weft (9) of the present invention is pulled back. Since the plurality of protrusions (11) are provided so as to protrude toward the tip end side (axial direction) of the thread guide (3), the wefts drawn out by fluid jetting during weft insertion are provided. Resistance to (9) is not generated, and the weft (9) is not damaged.

請求項２の発明および請求項５の発明により、請求項１記載の緯入れノズル（１）をより具体的に構成することができ、筬打ち後の緯糸（９）の切断時に、緯糸の自ら有する弾性によって織布から切り離された緯糸（９）が緯入れノズル（１）の上流側に向かって引き戻し方向に移動し始めたとしても、移動状態の緯糸（９）はスレッドガイド（３）の先端に設けた突起（１１）に引っ掛かることにより、緯糸（９）の移動を停止させることができ、緯糸（９）のノズル抜けを防止できる。 According to the invention of claim 2 and the invention of claim 5, the weft insertion nozzle (1) according to claim 1 can be configured more specifically, and the weft thread itself is cut when the weft thread (9) is cut after beating. Even if the weft yarn (9) separated from the woven fabric by the elasticity it has started to move in the pull-back direction toward the upstream side of the weft insertion nozzle (1), the weft yarn (9) in the moving state will remain in the thread guide (3). By catching on the projection (11) provided at the tip, the movement of the weft (9) can be stopped, and the nozzle of the weft (9) can be prevented from coming off.

請求項３の発明によれば、前記突起（１１）の基端（１５）が、スレッドガイド（３）の先端部（１０）および筒状部材（５１ａ、５１ｅ）のうち外側にある部材の緯入れ方向下流側の端面（５２）より上流側に位置されるから、複数の突起（１１）の間に形成される溝部（４１）のオリフィス流路（４０）に対する露出度合いが低下される。これにより、溝部（４１）から緯糸導入路（５）内側に抜ける気流の流れを抑えられる結果、緯入れ方向の流体の流れがより安定し、良好な緯入れが実現され、安定した織機稼働が実現される。このため、従来のような、緯入れノズル（１）の緯糸搬送力の低下を抑制できる。 According to invention of Claim 3, the base end (15) of the said protrusion (11) is the weft of the member which exists in the outer side among the front-end | tip part (10) of a thread guide (3), and a cylindrical member (51a, 51e). Since it is located upstream from the end face (52) on the downstream side in the insertion direction, the degree of exposure of the groove (41) formed between the plurality of protrusions (11) to the orifice channel (40) is reduced. As a result, the flow of air flowing from the groove (41) to the inner side of the weft introduction path (5) can be suppressed. As a result, the flow of fluid in the weft insertion direction is more stable, good weft insertion is realized, and stable loom operation is achieved. Realized. For this reason, the fall of the weft conveyance force of the weft insertion nozzle (1) like the past can be suppressed.

請求項４の発明によれば、前記スレッドガイド（３）の先端部（１０）に段部（５６ａ、５６ｅ）を形成し、前記筒状部材（５１ａ、５１ｅ）を前記段部（５６ａ、５６ｅ）に嵌まり合うように配置したから、筒状部材（５１ａ、５１ｅ）のスレッドガイド（３）に対する軸方向位置を画定することができ、スレッドガイド（３）の製造の際の筒状部材（５１ａ、５１ｅ）の軸方向位置のバラツキがなくなって緯入れノズル（３）の不良率が低下し、いわゆる歩留りが向上する。 According to invention of Claim 4, a step part (56a, 56e) is formed in the front-end | tip part (10) of the said thread guide (3), and the said cylindrical member (51a, 51e) is made into the said step part (56a, 56e). ), The axial position of the cylindrical members (51a, 51e) with respect to the thread guide (3) can be defined, and the cylindrical member (3) when the thread guide (3) is manufactured ( 51a, 51e) no longer varies in the axial position, the defect rate of the weft insertion nozzle (3) decreases, and so-called yield improves.

請求項６の発明によれば、前記筒状部材（５１ａ、５１ｂ、５１ｃ、５１ｄ）を、軸方向の全長にわたり、同一内径の貫通孔（５０ａ、５０ｂ、５０ｃ、５０ｄ）と、同一外径の外形とを有する円筒状に形成したから、筒状部材（５１ａ、５１ｂ、５１ｃ、５１ｄ）の加工製作が容易であり、量産に有利である。 According to invention of Claim 6, the said cylindrical member (51a, 51b, 51c, 51d) is the same outer diameter as the through-hole (50a, 50b, 50c, 50d) of the same internal diameter over the full length of an axial direction. Since it is formed in a cylindrical shape having an outer shape, it is easy to process and manufacture the cylindrical members (51a, 51b, 51c, 51d), which is advantageous for mass production.

請求項７の発明によれば、前記筒状部材（５１ｃ、５１ｄ）に前記円筒状部（５５ｃ、５５ｄ）よりも緯入れ方向上流側に前記円筒状部（５５ｃ、５５ｄ）に連なるフランジ部（５７ｃ、５７ｄ）を形成し、前記筒状部材（５１ｃ、５１ｄ）を、前記スレッドガイド（３）に設けられた半径方向外側に向かって延びる底面（５４ｃ、５４ｄ）に、前記フランジ部（５７ｃ、５７ｄ）の緯入れ方向下流側の端面を当接するように配置したから、前記筒状部材（５１ｃ、５１ｄ）を前記スレッドガイド（３）の緯糸導入路（５）内の所定の位置に容易に位置決めして配置でき、スレッドガイド（３）の製造の際の筒状部材（５１ｃ、５１ｄ）の軸方向位置のバラツキがなくなって緯入れノズル（３）の不良率が低下し、いわゆる歩留りが向上する。 According to invention of Claim 7, the flange part (55c, 55d) connected to the said cylindrical part (55c, 55d) in the weft insertion direction upstream rather than the said cylindrical part (55c, 55d) to the said cylindrical member (51c, 51d). 57c, 57d), and the cylindrical members (51c, 51d) are arranged on the bottom surface (54c, 54d) extending outward in the radial direction provided in the thread guide (3), and the flange portion (57c, 57d). 57d) is arranged so as to contact the downstream end surface in the weft insertion direction, so that the cylindrical members (51c, 51d) can be easily placed at a predetermined position in the weft introduction path (5) of the thread guide (3). It can be positioned and positioned, and the axial position of the cylindrical members (51c, 51d) at the time of manufacturing the thread guide (3) is eliminated, so that the defect rate of the weft insertion nozzle (3) is reduced and so-called yield is improved. Do

請求項８の発明によれば、ノズル抜け防止部材（５３）を緯入れノズル（１）のスレッドガイド（３）の内側に嵌まり合うように配置して用いられる筒状部材として構成したから、既存のスレッドガイド（３）にノズル抜け防止部材（５３）を取付けることにより、既存のスレッドガイド（３）にも緯糸のノズル抜け防止機能をもたせることができる。 According to the invention of claim 8, since the nozzle omission prevention member (53) is configured as a cylindrical member that is used so as to fit inside the thread guide (3) of the weft insertion nozzle (1), By attaching the nozzle omission prevention member (53) to the existing thread guide (3), the existing thread guide (3) can also be provided with a function of preventing the weft nozzle from omission.

本発明の緯入れノズル１は、流体噴射式織機に適用される。そして、本発明の緯入れノズル１は、本発明の特徴的な部分である緯糸のノズル抜け防止部材５３（請求項８）としての筒状部材の取付位置によって、大きく二種類に大別できる。すなわち、筒状部材をスレッドガイド３の先端部１０に取り付けたもの（筒状部材５１ａ、５１ｅ）と、筒状部材をスレッドガイド３内部の緯糸導入孔５の任意の位置に取り付けたもの（筒状部材５１ｂ、５１ｃ、５１ｄ）の２つである。以下、まず筒状部材５１ａ、５１ｅをスレッドガイド３の先端部１０に取り付ける例について説明し（図１〜図９）、そのあとに筒状部材５１ｂ、５１ｃ、５１ｄをスレッドガイド３内部の緯糸導入孔５の任意の位置に取り付ける例について説明する（図１０）。 The weft insertion nozzle 1 of the present invention is applied to a fluid jet loom. The weft insertion nozzle 1 of the present invention can be roughly divided into two types depending on the mounting position of the tubular member as the weft nozzle removal preventing member 53 (Claim 8), which is a characteristic part of the present invention. That is, a cylindrical member attached to the tip portion 10 of the thread guide 3 (cylindrical members 51a and 51e), and a cylindrical member attached to an arbitrary position of the weft introduction hole 5 inside the thread guide 3 (cylindrical member). Two members 51b, 51c and 51d). Hereinafter, an example in which the cylindrical members 51a and 51e are attached to the tip portion 10 of the thread guide 3 will be described first (FIGS. 1 to 9), and then the cylindrical members 51b, 51c and 51d are introduced into the weft thread inside the thread guide 3. An example of attaching to an arbitrary position of the hole 5 will be described (FIG. 10).

図１および図２は、本発明が適用される流体噴射式織機のうち、エアージェット織機の緯入れノズル（メインノズル）周辺部を示している。 1 and 2 show a peripheral portion of a weft insertion nozzle (main nozzle) of an air jet loom among fluid jet looms to which the present invention is applied.

緯入れノズル１は、主要な部材として、挿入孔４を有するノズル本体２と、前記挿入孔４に挿入されるスレッドガイド３と、圧縮流体としてのエアを加速するオリフィス部材１２と、緯糸９とエアが合流する中空部を有するパイプ１３とを有している。ここで、挿入孔４は、オリフィス部材１２が挿入される第一の挿入孔３３と、パイプ１３が取り付けられる第二の挿入孔３４とが同軸上に連なって形成されていわゆる貫通孔を形成し、また第１の挿入孔３３の開口部付近の内周には、スレッドガイド３を取り付けるための雌ねじ部３１が設けられている。 The weft insertion nozzle 1 includes, as main members, a nozzle body 2 having an insertion hole 4, a thread guide 3 inserted into the insertion hole 4, an orifice member 12 for accelerating air as a compressed fluid, and a weft 9 And a pipe 13 having a hollow portion where air merges. Here, the insertion hole 4 is formed so that a first insertion hole 33 into which the orifice member 12 is inserted and a second insertion hole 34 to which the pipe 13 is attached are coaxially connected to form a so-called through-hole. A female thread portion 31 for attaching the thread guide 3 is provided on the inner periphery near the opening of the first insertion hole 33.

なお、各部材の材質は、例えば金属材を用いるが、セラミックなどの耐摩耗性を有する材料であってもよく、各部材は、切削加工、放電加工や成形などの公知の方法で製造すればよい。ここに示す例では、ノズル本体２にアルミ材、スレッドガイド３、オリフィス部材１２およびパイプ１３にはステンレス材を採用している。 In addition, although the material of each member uses a metal material, for example, a material having wear resistance such as ceramic may be used, and each member may be manufactured by a known method such as cutting, electric discharge machining, or molding. Good. In the example shown here, an aluminum material is used for the nozzle body 2, and a stainless material is used for the thread guide 3, the orifice member 12 and the pipe 13.

スレッドガイド３は、その内部に、入り口付近から軸方向中央部に進むにつれてその内径が縮径され、その後は内径を同径に維持するように形成されて軸方向に貫通する緯糸９の緯糸導入路５を有する。また外側には、上記入り口付近から軸方向に、前記挿入孔４の雌ねじ部３１に嵌まり合う雄ねじ部３２を有する大径部６と、これより緯入れ方向下流側に形成される小径部７と、これより下流側の一部区間において下流側に進むにつれてその外径が縮径されるとともに下流側先端に連なるニードル部８とを有するとともに、小径部７とニードル部８との間には半径方向外側に向かって放射状に延びる複数の整流フィン２９が形成されており、隣接する二つの整流フィン２９の間には整流流路２８が形成されている。 The thread guide 3 has a reduced inner diameter as it advances from the vicinity of the entrance to the central portion in the axial direction. Thereafter, the weft 9 is introduced so as to maintain the same inner diameter and penetrate in the axial direction. It has a path 5. Further, on the outside, in the axial direction from the vicinity of the entrance, a large diameter portion 6 having a male screw portion 32 that fits into the female screw portion 31 of the insertion hole 4 and a small diameter portion 7 formed on the downstream side in the weft insertion direction. In addition, the outer diameter of the partial section on the downstream side of the downstream side is reduced toward the downstream side, the needle part 8 is connected to the downstream end, and between the small diameter part 7 and the needle part 8 is provided. A plurality of rectifying fins 29 extending radially outward are formed, and a rectifying flow path 28 is formed between two adjacent rectifying fins 29.

スレッドガイド３は、ノズル本体２の第一の挿入孔３３に挿入され、雌ねじ部３１と雄ねじ部３２との螺合によって気密状態を維持可能に取付けられており、小径部７およびニードル部８と、ノズル本体２の挿入孔４（第一の挿入孔３３）とで囲まれる空間が、環状流路２７を構成する。またノズル本体２には、管路２５を接続するためのコネクタ２６が取付けられており、図示しない圧力流体源から管路２５と環状流路２７とに通じる図示しない流路が設けられる。また、管路２５は、図示しない圧力流体源からの流体を制御する図示しない電磁制御弁の出力ポートに接続されており、所定の緯入れタイミングになると、管路２５からコネクタ２６を介して圧縮空気（エア）が環状流路２７に流れ込む。その後圧縮空気（エア）は、整流流路２８の整流フィン２９により整流された後、ニードル部８の外向き誘導面８ａと第一の挿入孔３３とオリフィス部材１２の内向き誘導面１２ａとにより画定されるオリフィス流路４０によって加速され、噴出口３０から噴出される。 The thread guide 3 is inserted into the first insertion hole 33 of the nozzle body 2 and is attached so as to maintain an airtight state by screwing between the female screw portion 31 and the male screw portion 32. The small diameter portion 7 and the needle portion 8 The space surrounded by the insertion hole 4 (first insertion hole 33) of the nozzle body 2 constitutes the annular flow path 27. Further, the nozzle body 2 is provided with a connector 26 for connecting the pipe 25, and a flow path (not shown) that leads from the pressure fluid source (not shown) to the pipe 25 and the annular flow path 27 is provided. The pipe 25 is connected to an output port of an electromagnetic control valve (not shown) that controls fluid from a pressure fluid source (not shown). When a predetermined weft insertion timing is reached, the pipe 25 is compressed via the connector 26. Air flows into the annular flow path 27. Thereafter, the compressed air (air) is rectified by the rectifying fins 29 of the rectifying flow path 28, and then is formed by the outward guide surface 8 a of the needle portion 8, the first insertion hole 33, and the inward guide surface 12 a of the orifice member 12. Accelerated by the defined orifice channel 40 and ejected from the ejection port 30.

一方、ヤーンガイド１４から緯糸導入路５に挿通された緯糸９は、噴射口３０から噴出されたエアの負圧によってスレッドガイド３から引き出され、パイプ１３の中空部を流れるエアと合流し、パイプ１３の開口部からエアとともに射出される。射出された緯糸９は、経糸２０の開口２１に緯入れされ、筬２２により筬打ちされたのち、カッター２３により織布２４から分離される。なお、スレッドガイド３の緯糸導入路５の入口に設けられるヤーンガイド１４は、緯糸導入路５の入口部の内径よりも小径の案内面を有し、例えば目ガラス等の耐摩耗性のある材料で製作される。 On the other hand, the weft 9 inserted from the yarn guide 14 into the weft introduction path 5 is drawn out from the thread guide 3 by the negative pressure of the air blown out from the injection port 30 and merges with the air flowing through the hollow portion of the pipe 13. It injects with air from 13 openings. The injected weft yarn 9 is inserted into the opening 21 of the warp yarn 20 and beaten by the scissors 22 and then separated from the woven fabric 24 by the cutter 23. The yarn guide 14 provided at the inlet of the weft introduction path 5 of the thread guide 3 has a guide surface whose diameter is smaller than the inner diameter of the inlet portion of the weft introduction path 5, and is a wear-resistant material such as eyeglass, for example. Will be produced.

そして、スレッドガイド３の下流側の先端部１０には、本発明の特徴的な部分である筒状部材５１ａが嵌め込まれ、かつ筒状部材５１ａの先端には突起１１が円周方向に複数設けられている。なお、図２では、筒状部材５１ａをスレッドガイド３の先端部１０の内側に嵌め込んで、スレッドガイド３の先端部１０を半径方向に二重構造とする例を示しているが、後述の図９の（ｃ）で示すように、筒状部材５１ｅをスレッドガイド３の先端部１０の外側に嵌め込んで、スレッドガイド３の先端部１０を半径方向に二重構造としてもよい。いずれの場合においても、前記筒状部材５１ａ、５１ｅおよびスレッドガイド３の先端部１０のうち内側にある部材、すなわち前記筒状部材５１ａ、５１ｅおよびスレッドガイド３のうち内周面が実質的に緯糸導入路５を構成する部材の緯入れ方向下流側先端に、前記突起１１が円周方向に複数設けられる。 The tubular member 51a, which is a characteristic part of the present invention, is fitted into the distal end portion 10 on the downstream side of the thread guide 3, and a plurality of protrusions 11 are provided in the circumferential direction at the distal end of the tubular member 51a. It has been. 2 shows an example in which the cylindrical member 51a is fitted inside the tip portion 10 of the thread guide 3 so that the tip portion 10 of the thread guide 3 has a double structure in the radial direction. As shown in FIG. 9C, the tubular member 51e may be fitted outside the tip portion 10 of the thread guide 3, so that the tip portion 10 of the thread guide 3 has a double structure in the radial direction. In any case, the inner members of the cylindrical members 51a and 51e and the tip portion 10 of the thread guide 3, that is, the inner peripheral surfaces of the cylindrical members 51a and 51e and the thread guide 3, are substantially wefts. A plurality of the protrusions 11 are provided in the circumferential direction at the distal end in the weft insertion direction of the member constituting the introduction path 5.

図３の（ａ）および（ｂ）は、筒状部材５１ａをスレッドガイド３の先端部１０の内側に嵌め込み、筒状部材５１ａの先端に突起１１を設けた例を示している。筒状部材５１ａは、軸方向の全長にわたり同一内径の貫通孔５０ａと、同一外径の外形を有する円筒状部５５ａとを有する円筒形状に形成されている。また、筒状部材５１ａの緯入れ方向下流側先端には、基端１５より先端側に進むにつれて先細り状に設けられる突起１１が円周方向に複数設けられている。この複数の突起１１は、後述する条件に基づいて一定間隔で円周方向に配設されており、隣り合う突起１１の間には溝部４１が形成される。この溝部４１に、筬打ち後の緯糸切断時に上流側に引き戻された緯糸９が引っ掛かり、捕捉される。複数の突起１１は、筒状部材５１ａの緯入れ方向下流側先端を放電加工等の公知の方法で削り出し加工することにより、筒状部材５１ａと一体に設けられている。 3A and 3B show an example in which the cylindrical member 51a is fitted inside the tip portion 10 of the thread guide 3, and the projection 11 is provided at the tip of the cylindrical member 51a. The cylindrical member 51a is formed in a cylindrical shape having a through hole 50a having the same inner diameter and a cylindrical portion 55a having an outer shape having the same outer diameter over the entire length in the axial direction. Further, a plurality of protrusions 11 are provided in the circumferential direction at the distal end on the downstream side in the weft insertion direction of the cylindrical member 51a so as to be tapered from the proximal end 15 toward the distal end side. The plurality of protrusions 11 are arranged in the circumferential direction at regular intervals based on conditions described later, and a groove portion 41 is formed between adjacent protrusions 11. The weft 9 pulled back to the upstream side at the time of cutting the weft after beating is caught in this groove 41 and captured. The plurality of protrusions 11 are provided integrally with the cylindrical member 51a by machining the downstream end in the weft insertion direction of the cylindrical member 51a by a known method such as electric discharge machining.

一方、スレッドガイド３の先端部１０には、内側に段部５６ａを設けて薄肉部を形成し、下流側に対向する底面５４ａを有する段付き形状としている。そして、筒状部材５１ａは、スレットガイド３の薄肉部の内周に嵌り合う外径を有しており、筒状部材５１ａは、緯入れ方向上流側の端面を底面５４ａに当接させて、スレッドガイド３の内側の段部５６ａに嵌まり合うように配置されている。筒状部材５１ａに設けられる貫通孔５０ａの内径と、スレッドガイド３の先端部１０の緯糸導入孔５の内径は同一径であるほうが、２つの内周面が連続されるため、緯糸９の引出し時に抵抗とならず好ましい。しかしながら、段差が小さければ、緯入れの際の抵抗は小さくさほど影響を与えない。また、筒状部材５１ａの貫通孔５０ａの内周面は、スレッドガイド３の緯糸導入路５と連通し、スレッドガイド３の先端部１０において、実質的に緯糸導入路５を構成している。 On the other hand, the tip portion 10 of the thread guide 3 is provided with a stepped portion 56a on the inner side to form a thin portion, and has a stepped shape having a bottom surface 54a facing the downstream side. And the cylindrical member 51a has an outer diameter which fits the inner periphery of the thin part of the thread guide 3, and the cylindrical member 51a abuts the end surface on the upstream side in the weft insertion direction to the bottom surface 54a, It arrange | positions so that it may fit in the step part 56a inside the thread guide 3. As shown in FIG. When the inner diameter of the through hole 50a provided in the cylindrical member 51a and the inner diameter of the weft introduction hole 5 of the tip portion 10 of the thread guide 3 are the same, the two inner peripheral surfaces are continuous. Sometimes it is preferable because it does not become resistance. However, if the level difference is small, the resistance at the time of weft insertion is small and does not affect so much. Further, the inner peripheral surface of the through hole 50 a of the cylindrical member 51 a communicates with the weft introduction path 5 of the thread guide 3, and substantially constitutes the weft introduction path 5 at the distal end portion 10 of the thread guide 3.

なお、筒状部材５１ａは、スレッドガイド３に対し、突起１１の基端１５が、スレッドガイド３の先端部１０の緯入れ方向下流側の端面５２より上流側に位置するように配置される。これにより、オリフィス流路４０に対する溝部４１の露出度合いがより抑えられる。よって、オリフィス流路４０によって加速された気流のうち、複数の突起１１の間に形成される溝部４１から緯糸導入路５内側に抜ける気流の流れを抑えられるため、緯入れ方向に流れる気流が安定的に形成され、安定的な緯入れが実現し、しかも緯入れノズル１の緯糸搬送力の低下を防止できる。 The cylindrical member 51 a is disposed with respect to the thread guide 3 such that the base end 15 of the protrusion 11 is located upstream of the end face 52 on the downstream side in the weft insertion direction of the distal end portion 10 of the thread guide 3. Thereby, the exposure degree of the groove part 41 with respect to the orifice flow path 40 is suppressed more. Therefore, among the airflows accelerated by the orifice flow path 40, the flow of the airflow that flows from the grooves 41 formed between the plurality of protrusions 11 to the inside of the weft introduction path 5 can be suppressed, so that the airflow flowing in the weft insertion direction is stable. Thus, stable weft insertion can be realized, and a decrease in the weft conveying force of the weft insertion nozzle 1 can be prevented.

つぎに突起１１のひとつに着目して詳述すると、突起１１は、筒状部材５１ａの緯入れ方向下流側先端を、放電加工等の公知の方法により、先端から長さＨまで軸方向に削り出すことによって加工される。このとき円周方向に形成された底面を基端１５とし、基端１５から先端に進むにつれて円周方向に先細り状に突出するように、かつ先端面である頂部１７が円周方向に長さａを有するように加工される。突起１１の形状について、より詳しくは、底面としての基端１５に連なる二つの面の側部１６と、その先端に連なる平面状の頂部１７と、緯入れ方向上流側から延びる貫通孔５０ａの内周面および円筒状部５５ａの外周面に連続し、前記側部１６と頂部１７とに連なる内周面４３および外周面４２とからなり、対向する側部１６と基端１５とにより画定される空間には、緯糸導入路５に通じる溝部４１が形成される。そして、突起１１は、４個以上、好ましくは緯糸９を引っかけるのに最も適した構造として、円周方向に６個以上３０個以下の数にて間隔をおいて配置される。このとき、隣り合う突起１１の先端の間隔は、隣り合う突起１１の間に設けられる溝部４１に、使用される緯糸９が入り込めるような間隔とする。 Next, the projection 11 will be described in detail by focusing on one of the projections 11. The projection 11 is formed by shaving the downstream end of the cylindrical member 51 a in the weft insertion direction from the tip to the length H by a known method such as electric discharge machining. Processed by taking out. At this time, the bottom surface formed in the circumferential direction is set as the base end 15, and the top portion 17, which is the front end surface, projects in a circumferential direction so as to taper out in the circumferential direction from the base end 15 toward the tip. processed to have a. More specifically, the shape of the protrusion 11 includes two side surfaces 16 connected to the base end 15 as a bottom surface, a planar top portion 17 connected to the tip, and a through hole 50a extending from the upstream side in the weft insertion direction. It consists of an inner peripheral surface 43 and an outer peripheral surface 42 that are continuous with the peripheral surface and the outer peripheral surface of the cylindrical portion 55 a, and are connected to the side portion 16 and the top portion 17, and are defined by the opposing side portion 16 and the base end 15. A groove 41 that communicates with the weft introduction path 5 is formed in the space. The protrusions 11 are arranged at intervals of 6 or more and 30 or less in the circumferential direction as a structure most suitable for hooking four or more, preferably wefts 9. At this time, the interval between the tips of the adjacent protrusions 11 is set such that the weft thread 9 used can enter the groove 41 provided between the adjacent protrusions 11.

実際の筒状部材５１ａの先端の寸法は、内径ｒ１は１〜２ｍｍ、好ましくはスレッドガイド３の緯糸導入孔５の内径と同一がよい。また、肉厚ｔ１はスレッドガイド３の肉厚以下、具体的には０．２〜０．５ｍｍである。そして、突起１１の個数、突起１１のピッチＰ、突起１１の頂部１７における円周方向の長さａ、突起１１の高さ（頂部１７と基端１５との距離）Ｈは、筒状部材５１ａの内径ｒ１、肉厚ｔ１、使用される緯糸の太さ等の値から、緯糸９を引っかけるのに最も適した数値に決定される。ただし、本発明の効果を十分に得られるようにするため、経験上得られた以下の条件を満たすようにする。 The actual tip of the cylindrical member 51a has an inner diameter r1 of 1 to 2 mm, preferably the same as the inner diameter of the weft introduction hole 5 of the thread guide 3. The wall thickness t1 is equal to or less than the wall thickness of the thread guide 3, specifically 0.2 to 0.5 mm. The number of the protrusions 11, the pitch P of the protrusions 11, the circumferential length “a” at the top portion 17 of the protrusion 11, and the height (distance between the top portion 17 and the base end 15) H of the protrusion 11 are as follows. From the values such as the inner diameter r1, the wall thickness t1 and the thickness of the weft used, the most suitable values for hooking the weft 9 are determined. However, in order to sufficiently obtain the effects of the present invention, the following conditions obtained from experience are satisfied.

（１）突起１１の円周方向の長さａは、前記筒状部材５１ａの先端における肉厚ｔ１以下とする。これにより、筬打ち後の緯糸切断時における緯糸９が上流側に引き戻された際に、より確実に溝部４１に入り込むことができるから、いわゆるノズル抜けを確実に防止できる。また円周方向の長さａをより小さくすれば、引き戻された緯糸９が頂部１７で弾かれてしまうことも防止できる。
（２）突起１１の高さＨは、筒状部材５１ａの先端における内周端半径ｒ１よりも小さくする。加えて、高さＨは、肉厚ｔ１より大きいほうが溝部４１に上記引き戻された緯糸９がより確実に引っ掛けることができて好ましい。
（３）突起１１のピッチＰは、筒状部材５１ａの先端の肉厚ｔ１とほぼ同じかあるいは大きいほうが、経験的に本発明の効果上好ましい。 (1) The length a of the protrusion 11 in the circumferential direction is equal to or less than the thickness t1 at the tip of the cylindrical member 51a. As a result, when the weft 9 at the time of cutting the weft after beating is pulled back to the upstream side, it is possible to more surely enter the groove portion 41, so that so-called nozzle omission can be reliably prevented. Further, if the length a in the circumferential direction is made smaller, it is possible to prevent the pulled back weft 9 from being bounced at the top portion 17.
(2) The height H of the protrusion 11 is made smaller than the inner peripheral radius r1 at the tip of the cylindrical member 51a. In addition, the height H is preferably larger than the wall thickness t1 because the weft 9 pulled back into the groove portion 41 can be more reliably hooked.
(3) It is empirically preferable that the pitch P of the protrusions 11 is substantially the same as or larger than the wall thickness t1 of the tip of the cylindrical member 51a.

これらの条件を総合的に勘案して、長さａ，高さＨ，ピッチＰを定めた結果、本発明では、突起１１の数を６個以上３０個以下とするのが適切であることが分かった。５個以下とすると、突起１１の間隔（すなわち溝部４１）が広すぎて緯糸９がすり抜けてしまい、本発明の効果が十分に得られない。また３１個以上とすると、突起１１の間隔が狭すぎるため、現在流体噴射式織機で緯入れ可能な緯糸９では、引っ掛かりにくく、本発明の効果が十分に得られない。ただし、突起１１の数は、使用する緯糸種やスレッドガイド３の寸法等により、ある程度変化し得る。 Considering these conditions comprehensively, the length a, height H, and pitch P are determined. As a result, in the present invention, it is appropriate that the number of protrusions 11 is 6 or more and 30 or less. I understood. If the number is five or less, the interval between the protrusions 11 (that is, the groove portion 41) is too wide and the weft 9 slips through, and the effect of the present invention cannot be sufficiently obtained. If the number is 31 or more, the interval between the protrusions 11 is too narrow, and the weft 9 that can be inserted by the current fluid jet loom is not easily caught and the effect of the present invention cannot be sufficiently obtained. However, the number of the protrusions 11 can be changed to some extent depending on the type of weft used, the size of the thread guide 3, and the like.

なお、この例では、側部１６に連なる外周面４２および内周面４３は、基端１５側より同一肉厚のまま頂部１７に延びるが、エアの流れの乱れを防止するために、その肉厚が先端に進むにつれて薄肉となるように形成してもよい。また、隣接する２つの突起１１の対向する側部１６のなす角度αは、使用する緯糸９の種類、先端部１０の寸法（ｒ１，ｔ１）、上述の条件（１）〜（３）から決まるが、一般に９０°以下（いわゆる鋭角、好ましくは４５°以下）が好ましい。 In this example, the outer peripheral surface 42 and the inner peripheral surface 43 connected to the side portion 16 extend from the base end 15 side to the top portion 17 with the same thickness, but in order to prevent disturbance of the air flow, You may form so that thickness may become thin as thickness progresses to a front-end | tip. Further, the angle α formed by the opposing side portions 16 of the two adjacent protrusions 11 is determined from the type of the weft 9 to be used, the dimensions (r1, t1) of the tip portion 10, and the above-described conditions (1) to (3). However, generally 90 ° or less (so-called acute angle, preferably 45 ° or less) is preferable.

図４は、図３のＡ−Ａ’における突起１１の形状を示す展開図、図５〜図８は、突起１１の形状の変形例を示している。図５は、三角波形状突起の先端部を尖状（ａ＝０）とし、基端部（底部）を平面に形成したものである。このような形状とすれば、頂部１７が平面の場合（図４）に比べて、戻った緯糸９が頂部１７の平面部に衝突することがなく、より緯糸９を基端部に導入しやすくなる。図６は、図５の突起１１に対して、基端部をＶ字溝（いわゆる底部が直線状) に形成したものである。このような形状とすれば、戻った緯糸９をＶ字溝部で挟んで保持する効果を期待でき、ノズル抜けをより防止できる。図７は、突起１１を鋸波形状としたものであり、図５、６の形状の上記利点を併せ持つ。図８は、間隔をおいて刻設されたＵ字溝によって設けられる隔壁により尖状の突起１１を形成したものである。 4 is a development view showing the shape of the protrusion 11 in A-A ′ of FIG. 3, and FIGS. 5 to 8 show modified examples of the shape of the protrusion 11. FIG. 5 shows a triangular wave-shaped projection having a pointed end (a = 0) and a base end (bottom) formed on a flat surface. With such a shape, compared with the case where the top portion 17 is a flat surface (FIG. 4), the returned weft yarn 9 does not collide with the flat surface portion of the top portion 17, and the weft yarn 9 can be more easily introduced into the base end portion. Become. FIG. 6 shows that the base end portion is formed in a V-shaped groove (so-called bottom portion is linear) with respect to the protrusion 11 of FIG. With such a shape, it is possible to expect the effect of holding the returned weft 9 sandwiched between the V-shaped groove portions, and it is possible to further prevent nozzle omission. FIG. 7 shows the projection 11 having a sawtooth shape, and has the above advantages of the shapes of FIGS. In FIG. 8, a pointed protrusion 11 is formed by a partition wall formed by U-shaped grooves cut at intervals.

図９は、筒状部材をスレッドガイド３の先端部１０に嵌め込む本発明の他の例を示している。図９の（ａ）は、スレッドガイド３の先端部１０の内側を段付き形状とせずにストレート形状(円筒状)とし、そこに筒状部材５１ａを嵌め込んだ例である。飛走状態の緯糸９に対してダメージを与えなくするために、筒状部材５１ａの緯入れ方向上流側の端面を面取り等することが望ましい。 FIG. 9 shows another example of the present invention in which the cylindrical member is fitted into the tip portion 10 of the thread guide 3. FIG. 9A shows an example in which the inner side of the distal end portion 10 of the thread guide 3 is not a stepped shape but a straight shape (cylindrical shape), and a tubular member 51a is fitted therein. In order to avoid damaging the flying weft 9, it is desirable to chamfer the end surface of the tubular member 51a on the upstream side in the weft insertion direction.

図９の（ｂ）は、筒状部材５１ａの先端に設けられた突起１１の頂部１７が、スレッドガイド３の端面５２によりも緯入れ方向上流側にある例である。この例では、二重構造の外側にある部材（この例ではスレッドガイド３）が突起１１を外側から完全に覆っているから、突起１１（溝部４１）がオリフィス流路４０に露出しない。これにより、溝部４１から緯糸導入路５の内側に抜ける気流の流れを完全に抑えることができるため、結果、緯入れ方向の流体の流れがより安定し、緯入れが安定し、緯入れノズル１の緯糸搬送力の低下を防止でき、緯止まりの少ないより安定した稼働が実現される。なお、頂部１７の端面５２に対するオフセット量ｔ３は、数ｍｍ程度であり、具体的には０．１ｍｍ以上５ｍｍ以下が好ましい。また、頂部１７と端面５２とをオフセットさせずに同一平面上に位置させても同様の効果が期待できる。 FIG. 9B is an example in which the top portion 17 of the projection 11 provided at the tip of the cylindrical member 51 a is further upstream in the weft insertion direction than the end surface 52 of the thread guide 3. In this example, since the member (in this example, the thread guide 3) outside the double structure completely covers the projection 11 from the outside, the projection 11 (groove portion 41) is not exposed to the orifice channel 40. As a result, the flow of the airflow flowing out from the groove portion 41 to the inside of the weft introduction path 5 can be completely suppressed. As a result, the fluid flow in the weft insertion direction is more stable, the weft insertion is stable, and the weft insertion nozzle 1 Thus, the lowering of the weft conveying force can be prevented, and more stable operation with less weft stop is realized. In addition, the offset amount t3 with respect to the end surface 52 of the top part 17 is about several mm, and specifically, 0.1 mm or more and 5 mm or less are preferable. The same effect can be expected even if the top portion 17 and the end surface 52 are positioned on the same plane without being offset.

図９の（ｃ）は、筒状部材５１ｅをスレッドガイド３の先端部１０の外側に嵌め込んで、スレッドガイド３の先端部１０を半径方向に二重構造とした例である。この例では、二重構造内側にある部材としてのスレッドガイド３の先端に突起１１が設けられる。また、スレッドガイド３の先端部１０の外側に段部５６ｅを形成して薄肉部を構成し、筒状部材５１ｅは、外側の前記段部５６ｅに嵌まり合う内径を有している。さらに、筒状部材５１ｅは、上記段部５６ｅの直前の外径と略同一径の外径を有するように設けることにより、筒状部材５１ｅを実質的にスレットガイド３の先端部１０として機能することになり、筒状部材５１ｅが設けられる領域に達したとしても、これよりも上流側のオリフィス流路４０によって加速された気流を乱すようなことはなく、緯入れの安定化の面で、より好ましい。なお、筒状部材５１ｅは、スレッドガイド３に対し、突起１１の基端１５が、筒状部材５１ｅの緯入れ方向下流側の端面５２より上流側に位置するように配置される。さらに、この例において、スレッドガイド３の先端に設けられた突起１１の頂部１７を、筒状部材５１ｅの端面５２よりも緯入れ方向上流側に位置させるか、または同一平面上に位置させれば、図９（ｂ）の例と同様の効果が期待できる。 FIG. 9C shows an example in which the cylindrical member 51e is fitted to the outside of the tip portion 10 of the thread guide 3, and the tip portion 10 of the thread guide 3 has a double structure in the radial direction. In this example, the protrusion 11 is provided at the tip of the thread guide 3 as a member inside the double structure. Further, a step portion 56e is formed on the outer side of the distal end portion 10 of the thread guide 3 to form a thin portion, and the cylindrical member 51e has an inner diameter that fits the outer step portion 56e. Furthermore, the cylindrical member 51e is provided so as to have an outer diameter substantially the same as the outer diameter immediately before the step portion 56e, so that the cylindrical member 51e substantially functions as the distal end portion 10 of the thread guide 3. In other words, even if the region where the cylindrical member 51e is provided is reached, the air flow accelerated by the upstream orifice flow path 40 is not disturbed, and in terms of stabilizing the weft insertion, More preferred. The cylindrical member 51e is arranged so that the proximal end 15 of the protrusion 11 is positioned upstream of the end surface 52 of the cylindrical member 51e on the downstream side in the weft insertion direction with respect to the thread guide 3. Further, in this example, if the top portion 17 of the protrusion 11 provided at the tip of the thread guide 3 is positioned upstream of the end surface 52 of the cylindrical member 51e in the weft insertion direction, or on the same plane. The same effect as in the example of FIG. 9B can be expected.

なお、筒状部材５１ａ、円筒部材５１ｅのスレッドガイド３の先端部１０への取り付けは、圧入、接着、ねじによる取り付け等が考えられる。例えば、筒状部材５１ａに雄ねじ部を、スレッドガイド３の先端部１０に雌ねじ部を加工し、筒状部材５１ａとスレッドガイド３の先端部１０の軸方向の相対的位置を調節可能とすれば、糸種、糸の形状等にあわせて突起１０の軸方向位置を調節できる。 Note that the cylindrical member 51a and the cylindrical member 51e can be attached to the distal end portion 10 of the thread guide 3 by press-fitting, adhesion, screw attachment, or the like. For example, if a male thread part is processed into the cylindrical member 51a and a female thread part is processed into the front-end | tip part 10 of the thread guide 3, if the axial relative position of the cylindrical member 51a and the front-end | tip part 10 of the thread guide 3 is adjustable. The axial position of the protrusion 10 can be adjusted according to the thread type, the thread shape, and the like.

以上が筒状部材をスレッドガイド３の先端部１０に取り付けたものの例である。つぎに、筒状部材をスレッドガイド３の内部に取り付けたものの例について説明する。 The above is an example in which the cylindrical member is attached to the distal end portion 10 of the thread guide 3. Next, an example in which a cylindrical member is attached to the inside of the thread guide 3 will be described.

図１０において、三種類の筒状部材５１ｂ、５１ｃ、５１ｄは、それぞれスレッドガイド３の内側に嵌まり合うように配置され、前記筒状部材５１ｂ、５１ｃ、５１ｄ(より具体的には、後述される各円筒状部５５ｂ、５５ｃ、５５ｄ)の緯入れ方向下流側先端には、突起１１が円周方向に複数設けられている。なお、図１０では、三種類の筒状部材すべてがスレッドガイド３に取り付けられているが、いずれか一つの筒状部材またはそれらを適宜組み合わせた２以上を取り付けてもよい。また、筒状部材は、緯糸導入路５が設けられる領域内の任意の位置に取り付けられる。突起１１の個数、突起１１のピッチＰ、突起１１の頂部１７における円周方向の長さａ、突起１１の高さ（頂部１７と基端１５との距離）Ｈは、筒状部材をスレッドガイド３の先端部１０に取り付ける例と同様に、筒状部材５１ｂ、５１ｃ、５１ｄの内径ｒ１、肉厚ｔ１、使用される緯糸の太さ等の値から、緯糸９を引っかけるのに最も適した数値に決定される。 In FIG. 10, three types of cylindrical members 51b, 51c, 51d are arranged so as to fit inside the thread guide 3, respectively, and the cylindrical members 51b, 51c, 51d (more specifically, will be described later). A plurality of protrusions 11 are provided in the circumferential direction at the downstream end in the weft insertion direction of each cylindrical portion 55b, 55c, 55d). In FIG. 10, all three types of cylindrical members are attached to the thread guide 3, but any one cylindrical member or two or more combinations thereof may be attached. Further, the cylindrical member is attached at an arbitrary position within the region where the weft introduction path 5 is provided. The number of the protrusions 11, the pitch P of the protrusions 11, the circumferential length “a” at the top portion 17 of the protrusion 11, and the height (distance between the top portion 17 and the base end 15) H of the protrusion 11 3 is the most suitable value for hooking the weft yarn 9 from the values such as the inner diameter r1, the wall thickness t1, the thickness of the weft yarn used, and the like. To be determined.

まず、第１の実施形態である筒状部材５１ｂは、スレッドガイド３の小径部７が設けられる領域において、スレッドガイド３の内側の緯糸導入路５に嵌まり合うように配置されている。筒状部材５１ｂは、緯入れ方向上流側が大径の円錐孔と、円錐孔の緯入れ方向下流側にあって軸方向に同一内径の貫通孔５０ｂと、軸方向の全長にわたり同一外径の外形を有する円筒状部５５ｂとを有する円筒形状に形成されている。 First, the cylindrical member 51b according to the first embodiment is disposed so as to fit into the weft introduction path 5 inside the thread guide 3 in the region where the small diameter portion 7 of the thread guide 3 is provided. The cylindrical member 51b has a conical hole having a large diameter on the upstream side in the weft insertion direction, a through hole 50b having the same inner diameter in the axial direction on the downstream side in the weft insertion direction of the conical hole, and an outer shape having the same outer diameter over the entire length in the axial direction. And a cylindrical portion 55b having a cylindrical shape.

一方、スレッドガイド３の小径部７が設けられる領域においてその内側の緯糸導入路５には、内径Ｄ２を有し軸方向に同径を維持する内周面と、これに連続され入口側に対向される底面５４ｂを有する段付き形状部５６ｂが形成されるとともに、これよりも下流側の緯糸導入路５は、内径Ｄ２よりも小径である内径Ｄ１をほぼ維持するように設けられる。筒状部材５１ｂは、底面５４ｂに緯入れ方向下流側の端面（突起１１の頂部１７）を当接させた状態で配置されて軸方向に対し位置決めされている。筒状部材５１ｂは、段付形状部５６ｂの内径Ｄ２の内周面に嵌り合う外径を有する一方、緯糸導入路５の内径Ｄ１よりも小径である内径ｄ１の貫通孔５０ｂを有しほぼ円筒形状に設けられる。また、筒状部材５１ｂには、緯糸９の案内用に、入口部より下流側に進むにつれて内径ｄ１に向けて徐々に縮径されるテーパ面が設けられ、その端部は内径ｄ１の内周面(緯糸導入路５)に連続するように設けられている。 On the other hand, in the region where the small-diameter portion 7 of the thread guide 3 is provided, the inner weft introduction path 5 has an inner peripheral surface having an inner diameter D2 and maintaining the same diameter in the axial direction, and is continuous to this and faces the inlet side. A stepped shape portion 56b having a bottom surface 54b is formed, and the weft introduction path 5 on the downstream side is provided so as to substantially maintain the inner diameter D1 which is smaller than the inner diameter D2. The cylindrical member 51b is disposed in a state in which the end surface (the top portion 17 of the protrusion 11) on the downstream side in the weft insertion direction is in contact with the bottom surface 54b, and is positioned with respect to the axial direction. The cylindrical member 51b has an outer diameter that fits the inner peripheral surface of the inner diameter D2 of the stepped shape portion 56b, and has a through hole 50b having an inner diameter d1 that is smaller than the inner diameter D1 of the weft introduction path 5 and is substantially cylindrical. Provided in shape. Further, the cylindrical member 51b is provided with a tapered surface that gradually decreases toward the inner diameter d1 as it goes downstream from the inlet for guiding the weft 9, and its end is the inner circumference of the inner diameter d1. It is provided so as to be continuous with the surface (weft introduction path 5).

筒状部材５１ｂの下流側の基端部１５には、これよりも先端側に向けて先細り状の突起１１が円周方向に複数設けられる。筒状部材５１ｂの貫通孔５０ｂの内周面およびテーパ面は、スレッドガイド３の緯糸導入路５と連通し、スレッドガイド３の小径部７の一部区間において、実質的に緯糸導入路５を構成している。そして筒状部材５１ｂの先端部の突起１１の頂部は、緯糸飛走路５の内径Ｄ１よりも小径の領域が、下流側の緯糸飛走路５に露出されており、隣接される突起１１の間の溝に、緯糸９が進入可能にされている。 A plurality of tapered protrusions 11 are provided in the circumferential direction on the proximal end portion 15 on the downstream side of the cylindrical member 51b toward the distal end side. The inner peripheral surface and the tapered surface of the through hole 50b of the cylindrical member 51b communicate with the weft introduction path 5 of the thread guide 3, and substantially pass the weft introduction path 5 in a partial section of the small diameter portion 7 of the thread guide 3. It is composed. The top portion of the protrusion 11 at the tip of the cylindrical member 51b has a region having a smaller diameter than the inner diameter D1 of the weft runway 5 exposed to the downstream weft runway 5, and between the adjacent protrusions 11 The weft 9 can enter the groove.

つぎに、第２の実施形態である筒状部材５１ｃは、スレッドガイド３の大径部６が設けられる領域の内側の緯糸導入路５に嵌まり合うように配置されている。筒状部材５１ｃは、緯入れ方向上流側が大径に設けられ下流側に進むにつれて内径ｄ２に向けて縮径される円錐孔と、円錐孔の緯入れ方向下流側にあって軸方向に同一内径ｄ２の貫通孔５０ｃと、同一外径の外形を有し基端部１５より先端側に向けて先細り状に延びる突起１１を円周方向に複数有する円筒状部５５ｃと、前記円筒状部５５ｃよりも緯入れ方向上流側にあって円筒状部５５ｃよりも大径に設けられ前記円筒状部５５ｃに連なるフランジ部５７ｃとから構成されている。 Next, the cylindrical member 51c which is 2nd Embodiment is arrange | positioned so that it may fit in the weft introduction path 5 inside the area | region in which the large diameter part 6 of the thread guide 3 is provided. The cylindrical member 51c has a conical hole which is provided with a large diameter on the upstream side in the weft insertion direction and is reduced in diameter toward the inner diameter d2 as it progresses downstream, and the same inner diameter in the axial direction on the downstream side of the conical hole in the weft insertion direction. From the through-hole 50c of d2, a cylindrical portion 55c having an outer shape with the same outer diameter, and having a plurality of protrusions 11 extending in the circumferential direction from the proximal end portion 15 toward the distal end side, and the cylindrical portion 55c And a flange portion 57c provided on the upstream side in the weft insertion direction and having a larger diameter than the cylindrical portion 55c and continuing to the cylindrical portion 55c.

一方、スレッドガイド３の大径部６が設けられる領域の内側の緯糸導入路５には、半径方向外側に向かって延びる底面５４ｃを有し、これよりも上流側が、入口部より同一の内径を維持するように設けられる段付き形状部５６ｃが形成され、底面５４ｃが設けられる領域より下流側には、これよりも小径であって下流側に進むにつれて内径Ｄ２’を経て、徐々に縮径されるテーパ状の緯糸導入路５を形成しており、筒状部材５１ｃのフランジ部５７ｃは、緯入れ方向下流側の端面を底面５４ｃに当接させて配置されて軸方向に対し位置決めされている。筒状部材５１ｃの貫通孔５０ｃの内周面は、スレッドガイド３の緯糸導入路５と連通し、スレッドガイド３の大径部６の一部区間において、実質的に緯糸導入路５を構成している。 On the other hand, the weft introduction path 5 inside the area where the large diameter portion 6 of the thread guide 3 is provided has a bottom surface 54c extending outward in the radial direction, and the upstream side of this has the same inner diameter from the inlet portion. A stepped shape portion 56c provided so as to be maintained is formed, and the downstream side of the region where the bottom surface 54c is provided has a smaller diameter and gradually decreases in diameter through an inner diameter D2 ′ as it goes downstream. And the flange portion 57c of the cylindrical member 51c is disposed with its end face on the downstream side in the weft insertion direction in contact with the bottom surface 54c and is positioned in the axial direction. . The inner peripheral surface of the through hole 50c of the cylindrical member 51c communicates with the weft introduction path 5 of the thread guide 3, and substantially constitutes the weft introduction path 5 in a partial section of the large diameter portion 6 of the thread guide 3. ing.

また、フランジ部５７ｃより緯入れ方向下流側に延びる円筒状部５５ｃは、緯糸導入路５の内径Ｄ２’よりも小径の外径ならびに内径ｄ２を有しかつ下流側に向けて同径に延びており、その先端の基端部１５には、これよりも先端側に向けて先細り状の突起１１が円周方向に複数設けられている。このため、上記内径の関係から、複数の突起１１、換言すれば隣接される突起１１により設けられる溝４１は、円周方向に全体的に緯糸導入路５の内側に露出するように配置されているため、隣接される突起１１の間の溝４１に、緯糸切断時に緯糸９が進入可能にされている。 The cylindrical portion 55c extending downstream in the weft insertion direction from the flange portion 57c has an outer diameter smaller than the inner diameter D2 ′ of the weft introduction path 5 and an inner diameter d2, and extends to the same diameter toward the downstream side. In addition, a plurality of tapered protrusions 11 are provided in the circumferential direction at the proximal end portion 15 at the distal end toward the distal end side. For this reason, from the relationship between the inner diameters, the plurality of protrusions 11, in other words, the grooves 41 provided by the adjacent protrusions 11 are arranged so as to be exposed to the inside of the weft introduction path 5 in the circumferential direction as a whole. Therefore, the weft 9 can enter the groove 41 between the adjacent protrusions 11 when the weft is cut.

つぎに、第３の実施形態である筒状部材５１ｄは、スレッドガイド３の緯糸導入路５の緯入れ方向上流側の開口部に嵌まり合うように配置されている。この例では、筒状部材５１ｄは、緯糸のノズル抜け防止機能のほか、緯糸を緯糸導入路５の中心に導くヤーンガイド１４としての機能も有している。筒状部材５１ｄは、軸方向に同一内径であり緯入れ方向上流側の開口部の角が丸められた貫通孔５０ｄと、スレットガイドの内径Ｄ３である内周面に嵌り合う外径を有し、その先端である基端部１５より下流側に延びる先細り状の突起１１を円周方向に複数有する円筒状部５５ｄと、前記円筒状部５５ｄよりも緯入れ方向上流側にあって前記円筒状部５５ｄに連なるフランジ部５７ｄとを有している。 Next, the cylindrical member 51d according to the third embodiment is disposed so as to fit into the opening on the upstream side in the weft insertion direction of the weft introduction path 5 of the thread guide 3. In this example, the tubular member 51 d has a function as a yarn guide 14 that guides the weft yarn to the center of the weft introduction path 5 in addition to the function of preventing the weft yarn from coming off the nozzle. The tubular member 51d has the same inner diameter in the axial direction and an outer diameter that fits the through hole 50d in which the corner of the opening on the upstream side in the weft insertion direction is rounded and the inner peripheral surface that is the inner diameter D3 of the thread guide. A cylindrical portion 55d having a plurality of tapered protrusions 11 extending in the circumferential direction extending downstream from the base end portion 15 which is the tip thereof, and the cylindrical shape on the upstream side in the weft insertion direction from the cylindrical portion 55d. And a flange portion 57d connected to the portion 55d.

一方、スレッドガイド３の緯糸導入路５の緯入れ方向上流側の端部には、半径方向外側に向かって延びる底面５４ｄを有する段付き形状部が設けられており、筒状部材５１ｄは、底面５４ｄに前記フランジ部５７ｄの緯入れ方向下流側の端面を当接されて軸方向に対し位置決めされている。筒状部材５１ｄの貫通孔５０ｄは、同一内径ｄ３の内周面として設けられるとともに、スレッドガイド３の緯糸導入路５と連通し、スレッドガイド３の大径部６の開口部において、実質的に緯糸導入路５を構成している。筒状部材５１ｄの円筒状部５５ｄは、その外径が緯糸導入路５の内径Ｄ３よりも小径に設けられており、複数の突起１１、換言すれば隣接される突起１１により設けられる溝４１は、円周方向に全体的に緯糸導入路５の内側に露出されているため、隣接される突起１１の間の溝４１に、緯糸切断時に緯糸９が進入可能にされている。 On the other hand, a stepped shape portion having a bottom surface 54d extending outward in the radial direction is provided at an upstream end of the weft introduction path 5 of the thread guide 3 in the weft inserting direction. 54d is brought into contact with the end surface of the flange portion 57d on the downstream side in the weft insertion direction so as to be positioned in the axial direction. The through hole 50d of the cylindrical member 51d is provided as an inner peripheral surface of the same inner diameter d3, communicates with the weft introduction path 5 of the thread guide 3, and substantially at the opening of the large diameter portion 6 of the thread guide 3. The weft introduction path 5 is configured. The cylindrical portion 55d of the cylindrical member 51d has an outer diameter smaller than the inner diameter D3 of the weft introduction path 5, and a groove 41 provided by the plurality of protrusions 11, in other words, the adjacent protrusions 11 is formed. Since the entire circumferential direction is exposed to the inside of the weft introduction path 5, the weft 9 can enter the groove 41 between the adjacent projections 11 when the weft is cut.

なお、筒状部材５１ｂ、５１ｃ、５１ｄが配置される領域の緯入れ方向下流側の直前の緯糸導入路５の内径Ｄ１、Ｄ２’、Ｄ３は、それぞれ前記筒状部材５１ｂ、５１ｃ、５１ｄの貫通孔５０ｂ、５０ｃ、５０ｄの内径ｄ１、ｄ２、ｄ３よりも大きく設けられる。上記の内径の関係（Ｄ１＞ｄ１、Ｄ２’＞ｄ２、Ｄ３＞ｄ３）により、筒状部材５１ｂ、５１ｃ、５１ｄの突起１１（頂部１７、溝部４１）が緯糸導入路５に露出するので、緯糸９が緯入れ方向上流側に向かって移動したとしても、隣接される突起１１間の溝部４１に確実に引っ掛かかることになり、緯糸９のノズル抜けを確実に防止できる。 The inner diameters D1, D2 ', D3 of the weft introduction path 5 immediately before the downstream side in the weft insertion direction of the region where the cylindrical members 51b, 51c, 51d are arranged are penetrated by the cylindrical members 51b, 51c, 51d, respectively. The holes 50b, 50c, 50d are provided larger than the inner diameters d1, d2, d3. Since the projections 11 (the top portion 17 and the groove portion 41) of the cylindrical members 51b, 51c, 51d are exposed to the weft introduction path 5 by the above-described inner diameter relationships (D1> d1, D2 ′> d2, D3> d3), the weft yarn Even if 9 moves toward the upstream side in the weft insertion direction, it will be reliably caught in the groove 41 between the adjacent projections 11, and the nozzle of the weft 9 can be reliably prevented.

また、筒状部材５１ｂ、５１ｃの貫通孔５０の内径ｄ１，ｄ２を、スレッドガイド３の緯糸導入路５における最小内径とすれば、戻ろうとする緯糸９が突起１１（溝部４１）に引っ掛かかる確率がさらに高まり有利である。 Further, if the inner diameters d1 and d2 of the through holes 50 of the cylindrical members 51b and 51c are set to the minimum inner diameter in the weft introduction path 5 of the thread guide 3, the weft 9 to be returned is caught by the protrusion 11 (groove portion 41). Probability is further increased and advantageous.

本発明は、エアージェット織機の緯入れノズルのように、筬打ちスレーと一体に取付けられ緯糸を経糸開口内に射出するメインノズルに限らない。例えば、それよりも上流側に設けられ、下流側に向けて緯糸を加勢する補助メインノズルにも適用可能である。また、ウォータージェット織機の緯入れノズルにも適用可能である。 The present invention is not limited to a main nozzle that is attached integrally with a beater sley and injects the weft into the warp opening, such as a weft insertion nozzle of an air jet loom. For example, the present invention can also be applied to an auxiliary main nozzle that is provided on the upstream side than that and urges the weft yarn toward the downstream side. Moreover, it is applicable also to the weft insertion nozzle of a water jet loom.

エアージェット織機の緯入れノズル周辺部を示す断面図である。It is sectional drawing which shows the weft insertion nozzle periphery part of an air jet loom. エアージェット織機の緯入れノズル周辺部の拡大断面図である。It is an expanded sectional view of the periphery of the weft insertion nozzle of the air jet loom. 本発明の実施例のスレッドガイド３の先端部１０の斜視図および断面図である。It is the perspective view and sectional drawing of the front-end | tip part 10 of the thread guide 3 of the Example of this invention. 図３におけるＡ−Ａ’にそった展開図である。FIG. 4 is a development view along A-A ′ in FIG. 3. 突起１１の形状の変形例を示す展開図である。FIG. 6 is a development view showing a modification of the shape of the protrusion 11. 突起１１の形状の変形例を示す展開図である。FIG. 6 is a development view showing a modification of the shape of the protrusion 11. 突起１１の形状の変形例を示す展開図である。FIG. 6 is a development view showing a modification of the shape of the protrusion 11. 突起１１の形状の変形例を示す展開図である。FIG. 6 is a development view showing a modification of the shape of the protrusion 11. 本発明の実施例のスレッドガイド３の先端部１０の断面図である。It is sectional drawing of the front-end | tip part 10 of the thread guide 3 of the Example of this invention. エアージェット織機の緯入れノズル周辺部の拡大断面図である。It is an expanded sectional view of the periphery of the weft insertion nozzle of the air jet loom.

Explanation of symbols

１緯入れノズル
２ノズル本体
３スレッドガイド
４挿入孔
５緯糸導入路
６大径部
７小径部
８ニードル部
８ａ外向き誘導面
９緯糸
１０先端部
１１突起
１２オリフィス部材
１２ａ内向き誘導面
１３パイプ
１４ヤーンガイド
１５基端
１６側部
１７頂部
２０経糸
２１開口
２２筬
２３カッター
２４織布
２５管路
２６コネクタ
２７環状流路
２８整流流路
２９整流フィン
３０噴出口
３１雌ねじ部
３２雄ねじ部
３３第一の挿入孔
３４第二の挿入孔
４０オリフィス流路
４１溝部
４２外周面
４３内周面
５０ａ貫通孔
５０ｂ貫通孔
５０ｃ貫通孔
５０ｄ貫通孔
５０ｅ貫通孔
５１ａ筒状部材
５１ｂ筒状部材
５１ｃ筒状部材
５１ｄ筒状部材
５１ｅ筒状部材
５２端面
５３緯糸のノズル抜け防止部材
５４ａ底面
５４ｂ底面
５４ｃ底面
５４ｄ底面
５４ｅ底面
５５ａ円筒状部
５５ｂ円筒状部
５５ｃ円筒状部
５５ｄ円筒状部
５５ｅ円筒状部
５６ａ段部
５６ｂ段部
５６ｃ段部
５６ｄ段部
５６ｅ段部
５７ｃフランジ部
５７ｄフランジ部 DESCRIPTION OF SYMBOLS 1 Weft insertion nozzle 2 Nozzle main body 3 Thread guide 4 Insertion hole 5 Weft introduction path 6 Large diameter part 7 Small diameter part 8 Needle part 8a Outward guide surface 9 Weft 10 Tip part 11 Protrusion 12 Orifice member 12a Inward guide surface 13 Pipe 14 Yarn guide 15 Base end 16 Side 17 Top 20 Warp 21 Opening 22 Reed 23 Cutter 24 Woven cloth 25 Pipe 26 Connector 27 Annular flow path 28 Current flow path 29 Current flow fin 30 Jet port 31 Female thread part 32 Male thread part 33 First Insertion hole 34 Second insertion hole 40 Orifice channel 41 Groove portion 42 Outer peripheral surface 43 Inner peripheral surface 50a Through hole 50b Through hole 50c Through hole 50d Through hole 50e Through hole 51a Cylindrical member 51b Cylindrical member 51c Cylindrical member 51d Cylindrical member Shaped member 51e cylindrical member 52 end face 53 weft thread nozzle prevention member 54a bottom face 54b bottom face 54c bottom face 54d Surface 54e bottom 55a cylindrical portion 55b cylindrical portion 55c cylindrical portion 55d cylindrical portion 55e cylindrical portion 56a stepped portion 56b stepped portion 56c stepped portion 56d stepped portion 56e stepped portion 57c flange portion 57d flange

Claims

A nozzle body (2) having an insertion hole (4) and a thread guide (3) inserted into the insertion hole (4), the thread guide (3) passing through the weft introduction path (5) And a needle portion (8) whose one end is fitted to the insertion hole (4) and whose outer diameter is reduced toward the downstream side in the weft insertion direction. ) And a compressed fluid is supplied to the space between the needle portion (8) of the thread guide (3) and the insertion hole (4) of the nozzle body (2), and the weft introduction path (5) In the weft insertion nozzle (1) of the fluid jet loom for injecting the weft (9) inserted through
Cylindrical members (51a, 55b, 55c, 55d, 55e) having through holes (50a, 50b, 50c, 50d, 50e) and having cylindrical portions (55a, 55b, 55c, 55d, 55e) at least one end in the axial direction are provided in a cylindrical shape. 51b, 51c, 51d, 51e) are arranged so as to fit either one of the inside and the outside of the thread guide (3),
In the region where the cylindrical members (51a, 51b, 51c, 51d, 51e) are arranged, the inner peripheral surface of the cylindrical member (51a, 51b, 51c, 51d, 51e) and the thread guide (3) is substantially. In particular, the members constituting the weft introduction path (5) are provided with a plurality of protrusions (11) provided in a circumferential direction at the distal end downstream in the weft insertion direction, which taper as they proceed from the proximal end (15) to the distal end side. Weft insertion nozzle (1) characterized in that

By disposing the cylindrical members (51a, 51e) so as to fit either the inner side or the outer side of the tip part (10) of the thread guide (3), the tip part of the thread guide (3) ( 10) has a double structure in the radial direction, and the protrusion is formed on the downstream end of the thread guide (3) and the cylindrical member (51a, 51e) on the downstream side in the weft insertion direction. The weft insertion nozzle (1) according to claim 1, wherein a plurality of (11) are provided in the circumferential direction.

The base end (15) of the protrusion (11) is the end surface (52) on the downstream side in the weft insertion direction of the outer member of the distal end (10) and the cylindrical members (51a, 51e) of the thread guide (3). 3. Weft insertion nozzle (1) according to claim 2, characterized in that it is located further upstream.

A step portion (56a, 56e) is formed at the tip (10) of the thread guide (3) to form a thin portion, and the cylindrical members (51a, 51e) are formed on the step portion (56a, 56e). 4. Weft insertion nozzle (1) according to claim 2 or 3, characterized in that it is arranged to fit.

The cylindrical members (51b, 51c, 51d) are disposed so as to fit inside the thread guide (3), and the cylindrical members (51b, 51c, 51d) are disposed at The weft insertion nozzle (1) according to claim 1, wherein a plurality of protrusions (11) are provided in the circumferential direction.

The cylindrical members (51a, 51b, 51c, 51d) are formed in a cylindrical shape having through holes (50a, 50b, 50c, 50d) having the same inner diameter and outer shapes having the same outer diameter over the entire length in the axial direction. The weft insertion nozzle (1) according to claim 2 or 5, wherein the cylindrical members (51a, 51b, 51c, 51d) are arranged inside the thread guide (3). .

The cylindrical members (51c, 51d) are formed with flange portions (57c, 57d) connected to the cylindrical portions (55c, 55d) upstream of the cylindrical portions (55c, 55d) in the weft insertion direction. In addition, the cylindrical members (51c, 51d) are disposed on the flange portion (54c, 54d) on the bottom surface (54c, 54d) extending outward in the radial direction provided in the weft introduction path (5) of the thread guide (3). The weft insertion nozzle (1) according to claim 5, wherein the weft insertion nozzle (1) is arranged so as to abut the end face downstream of the weft insertion direction of 57c, 57d).

A cylindrical member (51a, 51b, 51c, 51d) used so as to fit inside the thread guide (3) of the weft insertion nozzle (1),
The cylindrical members (51a, 51b, 51c, 51d) include a through-hole (50a, 50b, 50c, 50d) penetrating in the axial direction, and a cylindrical portion having at least one axial end having the same outer diameter in the axial direction. (55a, 55b, 55c, 55d), and a protrusion provided at the distal end of the cylindrical portion (55a, 55b, 55c, 55d) that tapers from the proximal end (15) toward the distal end side. A weft thread nozzle prevention member (53) used for a weft insertion nozzle, wherein a plurality of (11) are provided in the circumferential direction.