JPH03199451A - Reed for air jet loom - Google Patents

Abstract

PURPOSE:To obtain a reed saving consuming amount of pressurized air and having excellent stability of weft-inserting at high speed by setting air- converging angles satisfying specific conditions at both the parts of upper and lower jaws forming dents of a reed-introducing groove, setting an air-diffusing angle at an interior part and providing an edge part having a specific radius of curvature at the interior part. CONSTITUTION:Air-converging angles thetaA and thetaB satisfying relations of 0 deg.<=thetaA, 5 deg.<=thetaB<=30 deg. and thetaA<thetaB are set at an upper jaw part A and a lower jaw part B forming an introducing groove G in dents of a reed 1. Further, an air-diffusing angle thetaC is set at an interior part C in said introducing groove G and simultaneously a radius of curvature of edge part on a main nozzle side in said interior taper part is made to <=0.02mm to increase air-converging effect and inhibit flying out of weft from the reed groove G.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は補助ノズル併用型エアージェットルームに使用
される変形筬、更に詳しくは、高速化した場合の緯入れ
安定性、並びに圧気消費量削減機能を有する変形筬に関
するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a modified reed used in an air jet loom combined with an auxiliary nozzle, and more specifically, to improving weft insertion stability at high speeds and reducing pressurized air consumption. This invention relates to a modified reed with functions.

［従来の技術］ 本発明でいう変形筬とは第１図に示す上あご部Ａと下あ
ご部Ｂ、そして奥部Ｃで形成される溝部Ｇを持った筬羽
ｌが第２図の如く筬長手方向に同ピツチ同高さで平行配
列されているものである。[Prior Art] The modified reed according to the present invention is a reed in which the reed blade L has a groove G formed by the upper jaw part A, the lower jaw part B, and the inner part C shown in FIG. 1, as shown in FIG. 2. They are arranged in parallel at the same pitch and height in the longitudinal direction of the reed.

また、この筬の下あご部Ｂの前方長手方向に任意の距離
をもって補助ノズル２が複数本配置されている。Further, a plurality of auxiliary nozzles 2 are arranged at arbitrary distances in the front longitudinal direction of the lower jaw portion B of this reed.

従来、補助ノズル併用型エアージェットルームの織機回
転数は大部分が５００〜６００ｒｐｍの範囲にあったが
、最近はさらに高速タイプのものが開発実用化されるよ
うになった。ところが、エアージェットルームはエネル
ギー多消費型であるので、織機を高速化するほどｌピッ
ク当りの圧気消費量が増大し、かつ、緯糸飛走性もそれ
と共に不安定になる為、織機の高速化が、期待されるコ
ストの合理化に反映されていないのが現実である。一般
に液内においては第３図に示すように、サブノズル２か
ら噴射された圧気流は、案内溝内を緯糸飛走方向に流れ
る気流ｇ、筬羽ｌの前面へ跳ね返る気流ｆ１筬羽ｌの列
の間から上方、下方へ流れる気ｍａ、ｂ、筬羽ｌの列の
間から筬の背面へ流れる気ｉ　Ｃに分かれる。ここで、
織機回転数を高くする為にノズル噴射圧力を高くすると
筬羽前面へ跳ね返る気流ｆが増大する。このため、空気
流速の分布において高速流域部がより筬羽前面へ移動し
、緯糸が液溝Ｇ内から飛び出しやすくなり、緯入れが不
安定となる。Conventionally, most of the loom rotational speeds of air jet looms using an auxiliary nozzle have been in the range of 500 to 600 rpm, but recently even higher speed types have been developed and put into practical use. However, the air jet loom consumes a lot of energy, so as the speed of the loom increases, the amount of pressure air consumed per pick increases, and the weft flight properties also become unstable. However, the reality is that this is not reflected in the expected cost rationalization. Generally, in liquid, as shown in Fig. 3, the pressurized airflow injected from the sub-nozzle 2 consists of an airflow g flowing in the weft flight direction in the guide groove, an airflow f bouncing back to the front surface of the reed blades l, and a row of reed blades l. Qi flows upward and downward from between the rows of reeds, ma and b, and Qi flows from between the rows of reed feathers l to the back of the reed. here,
When the nozzle injection pressure is increased in order to increase the rotational speed of the loom, the airflow f that bounces back to the front surface of the reed blades increases. For this reason, in the distribution of air flow velocity, the high-speed flow area moves further toward the front of the reed blades, and the weft yarns tend to jump out from within the liquid groove G, making weft insertion unstable.

特開平１−２６６２４３号公報には、筬羽の上あご部に
圧気集束効果を持つ角度と筬羽奥部には圧気拡散効果を
もつ角度を施した筬羽が開示されている。Japanese Unexamined Patent Publication No. 1-266243 discloses a reed blade in which the upper jaw part of the reed blade is angled to have a pressure air focusing effect, and the back part of the reed blade is angled to have a pressure air diffusion effect.

しかし、上記公報に開示された筬羽は上あご部と下あご
部の大小関係については　特に記載がなく、特に下あご
部の角度については、角度の有無は問わないものとして
いる。However, the reed feathers disclosed in the above-mentioned publication do not specifically mention the size relationship between the upper jaw part and the lower jaw part, and in particular, regarding the angle of the lower jaw part, it does not matter whether there is an angle or not.

また、該公報には、空気拡散角における筬羽エツジ部の
曲率半径の必要性については記載されておらず、高速化
における織機稼動性、特に集束性が悪く、バラケ易い糸
やフィラメント径が小さい糸等を緯糸に用いた場合の緯
糸飛走性がいまだ低いものであった。In addition, the publication does not mention the necessity of the radius of curvature of the reed edge part in relation to the air diffusion angle, and the loom operability at high speeds is particularly poor, and yarns and filaments with small diameters that are easy to come apart have poor convergence. When yarn or the like was used as the weft, weft flight performance was still low.

［発明が解決しようとする課題］ このように、従来公知の補助ノズル併用型エアージェッ
トルーム用筬では、高速化においても緯入れ安定性に優
れ、且つ圧気消費量削減機能を提供するという複数の問
題を同時に解決できない。[Problems to be Solved by the Invention] As described above, the conventionally known reed for air jet loom combined with an auxiliary nozzle has several advantages: it has excellent weft insertion stability even at high speeds, and it also provides the function of reducing pressurized air consumption. You can't solve problems at the same time.

［課題を解決するための手段］ 本発明者らは、上記変形筬について鋭意研究を重ねた結
果、変形筬における上あご、下あごの気流集束角、また
奥部テーパ一部でのメインノズル側のエツジ部の曲率半
径をある特定の範囲に設定した変形筬が従来にない優れ
た緯入れ安定性、圧気ｌ肖費量削減機能を有することを
見い出しこの知見に基づいて本発明をなすに至った。[Means for Solving the Problems] As a result of extensive research on the above deformed reed, the present inventors have determined that the airflow convergence angle of the upper jaw and lower jaw in the deformed reed, and the main nozzle side in a part of the deep taper. It was discovered that a deformed reed in which the radius of curvature of the edge part is set within a certain range has unprecedented weft insertion stability and the ability to reduce air pressure costs.Based on this knowledge, the present invention was developed. Ta.

すなわち、本発明は、 補助ノズル併用型エアージェットルーム用変型筬におい
て、筬羽の案内溝を形成する上あご部、下あご部に気流
集束角θい、θ８がそれぞれ設けられ、奥部に気流拡散
角θＣが設けられ、該気流集束角θ９．θ８が下記式（
１）〜（３）を満足し、かつ流調奥部テーパ一部でのメ
インノズル側のエツジ部の曲率半径Ｒが、Ｒ＞　０．０
２ｍｍを満足することを特徴とするエアージェットルー
ム用筬である。That is, the present invention provides a modified reed for air jet loom combined with an auxiliary nozzle, in which airflow convergence angles θ and θ8 are provided in the upper and lower jaw portions, respectively, which form the guide grooves of the reed blades, and the airflow is concentrated in the inner part. A diffusion angle θC is provided, and the airflow convergence angle θ9. θ8 is the following formula (
1) to (3) are satisfied, and the radius of curvature R of the edge part on the main nozzle side in a part of the flow adjustment deep taper is R> 0.0
This reed for air jet loom is characterized by satisfying 2 mm.

０°≦θＢ　　　　　　■ ５°≦θＣ≦３０°　　■ θ６くθ８　　　　　■ 以下、本発明のエアージェットルーム用筬の一例を示す
図を参照して本発明を詳述する。0°≦θB ■ 5°≦θC≦30° ■ θ6×θ8 ■ Hereinafter, the present invention will be described in detail with reference to the drawings showing an example of the reed for an air jet loom of the present invention.

第４図に本発明のエアージェットルーム用筬を構成する
筬羽の一例の溝部Ｇを拡大して示す。FIG. 4 shows an enlarged view of the groove G of an example of the reed blade constituting the reed for air jet loom of the present invention.

筬羽ｌは、上あご部Ａ、下あご部Ｂ、及び奥部Ｃに囲ま
れた溝部Ｇを有する。The reed feather I has a groove part G surrounded by an upper jaw part A, a lower jaw part B, and a back part C.

本発明でいう上あご部、下あご部にそれぞれ設けられた
気流集束角θＡ、θＢは、筬羽ｌにおいて１−Ｉ　′断
面を筬打ち方向から見た時、緯糸の飛走方向に対する上
あご部Ａ、下あご部Ｂの満面の傾斜角度であり、第５（
ａ）図に示すように圧気噴射方向に対して溝部が狭めら
れており、この角度は液内を流れる気流ｇを集束する効
果を持つ。The airflow convergence angles θA and θB provided in the upper jaw portion and the lower jaw portion, respectively, in the present invention are defined as the airflow convergence angles θA and θB provided in the upper jaw portion and the lower jaw portion, respectively, when the 1-I′ cross section of the reed feather I is viewed from the reed beating direction. It is the inclination angle of the full surface of part A and lower jaw part B, and the fifth (
a) As shown in the figure, the groove portion is narrowed in the direction of the pressurized air injection, and this angle has the effect of converging the airflow g flowing within the liquid.

また、本発明でいう奥部Ｃに設けられた気流拡散角θ。Also, the airflow diffusion angle θ provided in the inner part C according to the present invention.

は、筬羽１において　ｎ−ｎ　′断面を流下面から見た
時、緯糸飛走方向に対する奥部Ｃの溝面の傾斜角度であ
り、第５（ｂ）図に示すように圧気噴射方向に対して溝
部が広げられており、この角度は液内を流れる気流ｇを
拡散する効果をもつ。is the inclination angle of the groove surface of the inner part C with respect to the weft flying direction when the n-n' cross section of the reed blade 1 is viewed from the flowing surface, and as shown in Fig. 5(b), On the other hand, the groove portion is widened, and this angle has the effect of diffusing the air current g flowing within the liquid.

ただし上記のθ８．θ６．θ。は、第６図に示す様にテ
ーパ一部ｊの丸くなった筬羽の場合でも設定できる。However, the above θ8. θ6. θ. can be set even in the case of a reed with a rounded taper part j as shown in FIG.

本発明のエアージェットルーム用筬の上あご部、下あご
部の気流集束角θＡ、θＢは、０°≦θ４゜５°≦０８
≦３０°、θ６〈θ８を満足することが必要である。The airflow convergence angles θA and θB of the upper and lower jaws of the air jet loom reed of the present invention are 0°≦θ4°5°≦08
It is necessary to satisfy ≦30° and θ6<θ8.

θ８がＯｏより小さいと空気流集束効果が得られないの
で好ましくなく、圧気削減化の点から０９が００である
と好ましい。If θ8 is smaller than Oo, the air flow focusing effect cannot be obtained, which is not preferable, and from the viewpoint of reducing air pressure, it is preferable that 09 be 00.

θＣが５°より小さいと空気流集束効果が充分に得られ
ず、逆に３０°を越えると製織時に緯糸及び経糸を傷つ
け、毛羽及び切断の原因となるので好ましくない。If θC is less than 5°, a sufficient airflow focusing effect cannot be obtained, whereas if it exceeds 30°, the weft and warp threads will be damaged during weaving, causing fuzzing and cutting, which is not preferable.

奥部Ｃに設けられた気流拡散角θＣの大きさは特に限定
されるものではないが、筬背面へ気流を流す効果の点か
ら２°〜３０’が好ましい。Although the size of the airflow diffusion angle θC provided in the inner portion C is not particularly limited, it is preferably 2° to 30′ from the viewpoint of the effect of flowing the airflow to the back surface of the reed.

この様に、上あご部、下あご部に所定の大きさの気流集
束角θＡ、θＢを付与することによって、筬溝内での下
から上へ流れる気流を増加させることができる。また、
奥部に圧気拡散角θ。を付与することによって、筬背面
側へ抜ける気流Ｃを発生させ、その結果、筬溝内の高速
流速部が筬の奥部Ｃの方へ移動し、液溝Ｇからの緯糸飛
び出しが解ｌ肖され、安定的な緯入れが得られる。In this manner, by providing predetermined airflow convergence angles θA and θB to the upper jaw portion and the lower jaw portion, it is possible to increase the airflow flowing from the bottom to the top within the reed groove. Also,
Pressure diffusion angle θ in the deep part. By applying this, an airflow C is generated that escapes to the back side of the reed, and as a result, the high-velocity part in the reed groove moves toward the inner part C of the reed, and the weft yarn protruding from the liquid groove G is eliminated. Stable weft insertion can be obtained.

また、第７図に示すように、筬羽断面における直線部の
割合りは下式で計算され、Ｌが大きい捏水発明の効果は
大きいが、その反面、筬羽エツジ部での経糸シゴキが増
大し、糊落ちや経糸切れ等の問題を誘発させることにな
り、織物種等に応じた最適な条件が必要とされる。In addition, as shown in Fig. 7, the proportion of the straight part in the cross section of the reed blade is calculated by the following formula, and the effect of the water-sprinkling invention with a large L is large, but on the other hand, the warp threads are squeezed at the edge part of the reed blade. This results in problems such as glue removal and warp thread breakage, so optimal conditions are required depending on the type of fabric.

Ｌの好ましい範囲は５０〜９０％である。The preferred range of L is 50 to 90%.

更に、第８図に示すように、筬羽奥部Ｃに設けられた奥
部テーパ一部でのメインノズル側のエツジ部の曲率半径
Ｒは、Ｒ＞　０．０２ｍｍを満足することが必要である
。ここでいうエツジ部の曲率半径Ｒとは、エツジ部Ｅの
曲面と同一曲面をもつ円の半径長さをいう。Furthermore, as shown in Fig. 8, the radius of curvature R of the edge part on the main nozzle side at a part of the inner taper provided in the inner part C of the reed blade must satisfy R>0.02 mm. be. The radius of curvature R of the edge portion here refers to the radial length of a circle having the same curved surface as the curved surface of the edge portion E.

緯糸は、筬溝内を飛走中、特にその先端部は、たえず液
溝面に接触しており、集束性が悪くバラケ易い糸やフィ
ラメント径の小さい糸等、その曲率半径Ｒ値が小さいと
緯糸飛走性に悪影響を及ぼし、織機稼動性を著しく低下
させるものである。While the weft yarn is flying in the reed groove, its tip, in particular, is constantly in contact with the liquid groove surface, and if the radius of curvature R value is small, such as a yarn that has poor convergence and easily comes apart, or a yarn with a small filament diameter, This adversely affects the weft flight properties and significantly reduces the operability of the loom.

なお、筬を構成する複数の筬羽形状を全て同一にしても
よく、また主ノズルや補助ノズルからの距離に応じて溝
部の形状を適切に変更して用いてもよい。Note that the shapes of the plurality of reed blades constituting the reed may all be the same, or the shape of the groove portion may be appropriately changed depending on the distance from the main nozzle or the auxiliary nozzle.

以下、本発明を実施例によって、具体的に説明する。Hereinafter, the present invention will be specifically explained with reference to Examples.

ｌ−：筬羽のテーパ一部の直線部の長さ（ｍｍ）［実施
例コ 実施例１〜６、比較例１〜４ 上あご部、下あご部の気流集束角θい、θ５をそれぞれ
０°、２０°と一定にし、奥部の気流拡散角が５°、１
００における、奥部テーパ一部でのメインノズル側のエ
ツジ部の曲率半径Ｒを０．０１〜０．１０ｍｍの範囲で
選定し、製織評価を行ない、実施例１〜６、比較例１〜
４とした。l-: Length of the straight part of the tapered part of the reed feathers (mm) [Examples Examples 1 to 6, Comparative Examples 1 to 4 The airflow convergence angles θ and θ5 of the upper jaw and lower jaw, respectively 0° and 20° are constant, and the airflow diffusion angle at the back is 5° and 1
00, the radius of curvature R of the edge part on the main nozzle side in a part of the deep taper was selected in the range of 0.01 to 0.10 mm, and weaving evaluation was performed. Examples 1 to 6 and Comparative Examples 1 to
It was set as 4.

その結果を第１表に示す。第１表には、織機回転数８０
０ｒｐｍで、３日間連続運転した時の１日当りの平均の
緯糸共端トラブル停台回数を記す。The results are shown in Table 1. Table 1 shows that the loom rotation speed is 80
The average number of machine stoppages per day due to weft co-end problems during continuous operation for 3 days at 0 rpm is recorded.

また、使用した緯糸はフィラメントデニール数が、１デ
ニールの緯糸と０．５デニールの緯糸を用いて評価した
。Further, the wefts used were evaluated using wefts with a filament denier of 1 denier and 0.5 denier.

製織性良好を　平均緯糸先端トラブル停台回数５回以内
として考えると、本発明のエアージェットルーム層流を
用いて製織した場合は緯入れが不安定なフィラメントデ
ニール数の小さな糸を用いても、製織性は良好であった
。Considering that good weaving performance is defined as the average number of machine stoppages due to weft tip problems within 5 times, when weaving is performed using the air jet loom laminar flow of the present invention, even when using a yarn with a small filament denier that is unstable in weft insertion, The weavability was good.

第１表 ［発明の効果］ 本発明のエアージェットルーム用筬は、前述のように構
成されているので、圧気消費量の削減、緯入れ安定とい
った効果を同時に達成できる。このような機能を備えた
筬を用いることによって、いかなる回転数に於いても、
圧気量削減効果をもたらし、かつ安定的に緯糸を供給し
、経済的にも優れた効果を奏するものである。Table 1 [Effects of the Invention] Since the air jet loom reed of the present invention is constructed as described above, it is possible to simultaneously achieve the effects of reducing pressurized air consumption and stabilizing weft insertion. By using a reed with such functions, no matter the rotation speed,
It brings about the effect of reducing the amount of pressurized air, stably supplies the weft yarn, and has excellent economical effects.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は変形筬を構成する各部の名称、及び補助ノズル
を示す図である。 第２図は筬羽で構成される変形筬の水平断面図及びメイ
ンノズル、補助ノズルの配置を示す図である。 第３図は、補助ノズルから噴射された空気流の分散を示
した筬羽側面図である。 第４図は本発明の筬を構成する筬羽の溝部の拡大図であ
る。 第５（ａ）図及び第５（ｂ）図は筬羽の溝部の広狭の態
様を説明する筬羽断面図である。 第６図はテーパ一部の丸い筬羽において設定される気流
集束角、気流拡散角を示す図である。 第７図は筬羽テーパ一部における直線部を示す図である
。 第８図は、奥部テーパ一部でのメインノズル側のエツジ
部の曲率半径を示す図である。 ｌ・・・筬羽、　２・・・補助ノズル、Ａ・・・上あご
部、Ｂ・・・下あご部、　Ｃ・・・奥部、　Ｅ・・・エ
ツジ部、Ｇ・・・溝部、　Ｍ・・・メインノズル、Ｒ・
・・奥部テーパ一部でのメインノズル側のエツジ部の曲
率半径、 θ８・・・上あご部の気流拡散角、 θ８・・・下あご部の気流集束角、 θ。・・・奥部の気流拡散角、 θ・・・気流集束角もしくは気流拡散角、ａ・・・筬羽
ｌの列の間から上方へ流れる気流、ｂ・・・筬羽ｌの列
の間から下方へ流れる気流、Ｃ・・・筬羽ｌの列の間か
ら筬の背面へ流れる気流、ｆ・・・筬羽１の前面へ跳ね
返る気流、ｇ・・・液溝内を流れる気流 ｈ・・・緯糸飛走方向、 ｉ・・・圧気噴射方向、 ｊ・−・筬羽テーパ一部、 ｐ・・・筬羽厚み方向の中点 １ｓ１図FIG. 1 is a diagram showing the names of each part constituting the modified reed and auxiliary nozzles. FIG. 2 is a horizontal sectional view of a modified reed made of reed blades and a diagram showing the arrangement of the main nozzle and the auxiliary nozzle. FIG. 3 is a side view of the reed blade showing the dispersion of the airflow injected from the auxiliary nozzle. FIG. 4 is an enlarged view of the grooves of the reed feathers constituting the reed of the present invention. FIGS. 5(a) and 5(b) are cross-sectional views of the reed blades for explaining the width and narrowness of the grooves of the reed blades. FIG. 6 is a diagram showing the airflow convergence angle and airflow diffusion angle set in the round reed blades of a part of the taper. FIG. 7 is a diagram showing a straight portion in a part of the reed blade taper. FIG. 8 is a diagram showing the radius of curvature of the edge portion on the main nozzle side in a part of the deep taper. L...Reed feather, 2...Auxiliary nozzle, A...Upper jaw part, B...Lower jaw part, C...Back part, E...Edge part, G...Groove part, M... Main nozzle, R...
...Radius of curvature of the edge on the main nozzle side in a part of the deep taper, θ8...Airflow diffusion angle at the upper jaw, θ8...Airflow convergence angle at the lower jaw, θ. ...Airflow diffusion angle at the back, θ...Airflow convergence angle or airflow diffusion angle, a...Airflow flowing upward from between the rows of reed feathers l, b...Between the rows of reed feathers l C...Airflow flowing from between the rows of reed feathers l to the back of the reed, f...Airflow bouncing back to the front of reed feathers 1, g...Airflow flowing in the liquid groove h. ...Weft flying direction, i...pressure air injection direction, j...part of reed blade taper, p...midpoint 1s1 diagram in reed blade thickness direction

Claims (1)

【特許請求の範囲】 補助ノズル併用型エアージェットルーム用変型筬におい
て、筬羽の案内溝を形成する上あご部、下あご部に気流
集束角θ＿Ａ、θ＿Ｂがそれぞれ設けられ、奥部に気流
拡散角θ＿Ｃが設けられ、該気流集束角θ＿Ａ、θ＿Ｂ
が下記式（１）〜（３）を満足し、かつ筬羽奥部テーパ
ー部でのメインノズル側のエッジ部の曲率半径Ｒが、Ｒ
＞０．０２ｍｍを満足することを特徴とするエアージェ
ットルーム用筬。 ０°≦θ＿Ａ（１） ５°≦θ＿Ｂ≦３０°（２） θ＿Ａ＜θ＿Ｂ（３）[Scope of Claims] In a modified reed for air jet loom combined with an auxiliary nozzle, airflow convergence angles θ_A and θ_B are provided in the upper and lower jaw parts, respectively, which form the guide grooves of the reed blades, and the airflow is diffused in the inner part. An angle θ_C is provided, and the airflow focusing angles θ_A, θ_B
satisfies the following formulas (1) to (3), and the radius of curvature R of the edge part on the main nozzle side at the inner taper part of the reed blade is R
A reed for air jet looms, which is characterized by satisfying >0.02mm. 0°≦θ_A (1) 5°≦θ_B≦30° (2) θ_A<θ_B (3)