CN1521293A - Reeds for Air Jet Looms - Google Patents

Abstract

The object of the present invention is to stabilize the reflection direction of the sprayed air from the sub-nozzle at the top corner of the inner side, eliminate the difference of each sub-nozzle in the air flow in the weft guide groove, and stabilize the flying away of the weft yarn. Disclosed is a reed for an air-jet loom. The reed for an air-jet loom has a weft guide groove (8) that opens in a U-shape on the weaving side, and is characterized in that, in the weft guide groove (8), the top The wall surface (10) and the inner wall surface (9) are planar respectively, and the inner side corner surface (12) connecting the above-mentioned top wall surface (10) and the inner wall surface (9) includes the first arc surface (16), the first 1. The arc surface (16) intersects the above two wall surfaces (9, 10) respectively at an intersection angle greater than 0°, and the intersection angle (θ ₁ ) between the first arc surface (16) and the top wall surface (10) It is different from the intersection angle (θ ₂ ) between the first arc surface (16) and the inner wall surface (9).

Description

Reeds for Air Jet Looms

technical field

The invention relates to a reed for an air jet loom.

Background technique

As given in Japanese Patent Application Laid-Open No. H2-53935, the following types are described for weft guide grooves in reeds for air-jet looms, in which the inner side corner surfaces connecting the top wall surface and the inner wall surface are formed by circular arcs. face or plane. In order to prevent the weft yarn from jumping out towards the open side of the weft guide groove due to the air flow escaping from the weft guide groove, it is preferable to enlarge the inside of the weft guide groove.

However, since in the drawings in the above-mentioned documents, including the case where the inner side corner surfaces are connected to each other at any one of the arc surface and the plane surface, the intersection between the inner side corner surface and the top wall surface The angle is still the same as the intersection angle between the inner side top corner surface and the inner wall surface, so in terms of the cross-sectional shape of the weft yarn, according to the ratio of the length of the inner side top corner surface, the area of the inner side top corner increases, by The inside of this weft guide groove is narrowed. Accompanying this, the weft yarn tends to jump out toward the open side of the weft guide groove, and as a result, a weft entry error occurs. In addition, if the rear corner surface is reduced, the length of the rear corner surface of the enlarged reflective surface in the rear is also shortened. Accordingly, since the sub-nozzle is sprayed so as to intersect the weft insertion direction at an acute angle, the direction of the air reflected in the vicinity of the apical surface on the back side is unstable. That is, if the spraying direction is slightly different for each sub-nozzle provided along the weft-entry direction, the degree of collision of the sprayed air at the top wall surface near the inner side corner, the inner side corner face, and the inner wall surface Different, the direction of the reflected air makes a big difference. As a result, the air flow is different for each sub-nozzle, and the flying of the weft yarn becomes unstable. Therefore, it is preferable that the length of the inner side top corner surface be as long as possible. Here, "intersection" means not only intersections but also connections between surfaces or extended surfaces. "Intersection angle" refers to the angle formed between the surfaces at the intersection position, and "intersection angle at the intersection of the plane and the arcuate surface" refers to the angle formed between the contact surface (tangent surface) of the arcuate surface at the intersection position and the plane. When the plane and the arc surface are connected to each other, the contact surface of the arc surface is consistent with the plane, and the intersection angle between the two is 0°.

The present invention was developed in consideration of the above-mentioned actual situation, and the purpose of the present invention is to stabilize the reflection direction of the jet air from the sub-nozzle at the top corner of the inner side, and to eliminate the air flow of each nozzle at the weft guide groove. difference, and stabilize the flying away of the weft yarn.

The present invention relates to a reed for an air-jet loom. The reed for an air-jet loom has a weft guide groove opened in a U-shape on the weaving side. Each is planar, and the inner side corner surface connecting the above-mentioned top wall surface and the inner wall surface includes a first arc surface, and the first arc surface intersects with the above-mentioned two wall surfaces at an intersection angle of 0° or more, and the above-mentioned first arc surface The intersection angle (θ ₁ ) between the arcuate surface and the top wall surface is different from the intersection angle (θ ₂ ) between the first arcuate surface and the inner wall surface.

In addition, when the distance between the top wall surface or the inner wall surface and the center of the first arcuate surface that forms the larger of the two intersection angles is represented by L, and the radius of curvature of the first arcuate surface is represented by _R1 , then Preferably 0.9R ₁ ≥ L. According to this method, the intersection angle between the first arc surface and the top wall surface or the inner wall surface forming the larger intersection angle is sufficiently large, and the cross-sectional area of the top corner on the inner side remains unchanged in terms of cross-sectional shape. Large, the inside of the weft guide groove is not narrow.

The sub-nozzle is arranged near the bottom corner of the open side of the weft guide groove, the jet air intersects with the weft entry direction at an acute angle, and sprays toward the center of the weft guide groove obliquely upward, and is reflected near the top corner surface of the inner side. In the prior art, if the radius of curvature of the first arcuate surface is increased, there is an advantage that an approximate plane is formed, and the apical surface itself on the back side is enlarged, and the reflection direction is stabilized. On the other hand, if the radius of curvature of the first arcuate surface is increased, there is a disadvantageous situation that the inner portion of the weft yarn guide groove becomes narrow, and the weft yarn is moved from the opening due to the jet air reflected by the first arcuate surface. Side jump out, prone to weft-in errors.

When comparing two cross-sectional shapes of the present invention with different intersection angles, and an existing product in which the top angle surface on the inner side is connected to the two surfaces of the top wall surface and the inner wall surface, and the intersection angles are all 0°, in the Under the condition that the radius of curvature of the corner surface of the part side is the same, in the case of the present invention, the cross-sectional area of the corner part of the back part becomes smaller in proportion to the length reduction of the arc surface, and the inside of the weft guide groove expands. In addition, under the condition that the cross-sectional area of the inner corner is the same, in the case of the present invention, the radius of curvature of the inner corner surface can be increased to be closer to the plane. In addition, the "cross-sectional area of the inner corner" refers to the cross-sectional area of a triangle surrounded by the extension surface of the top wall surface, the extension surface of the inner wall surface, and the inner corner surface.

Due to the above reasons, due to the difference in the spray direction of each sub-nozzle juxtaposed in the weft-entry direction, the degree of collision of the sprayed air toward the top wall surface near the corner of the inner side, the corner surface of the inner side, and the inner wall surface Does not make a big difference, nor does the direction of the reflected air make a big difference. Accordingly, the airflow of each sub-nozzle in the weft guide groove is stabilized, and the flying of the weft is stabilized.

The present invention is characterized in that the intersecting angle θ ₂ between the first arcuate surface and the inner wall surface is larger than the intersecting angle θ ₁ between the first arcuate surface and the top wall surface.

The present invention is characterized in that the intersecting angle θ ₁ between the first arcuate surface and the inner wall surface is larger than the intersecting angle θ ₂ between the first arcuate surface and the inner wall surface.

The present invention is characterized in that the first arcuate surface of the above-mentioned inner part side top corner surface is connected with one of the above-mentioned top wall surface and the inner wall surface so that the intersection angle is 0°, and a second arcuate surface is provided. The arc surface is connected with the first arc surface, and is connected with the other surface, and the above-mentioned inner side top angle surface is formed by the first arc surface and the second arc surface; the second arc surface is connected with the top wall surface and the inner The other of the walls is connected in such a way that the intersection angle is 0°, and the radius of curvature (R ₁ ) of the second arc surface is smaller than that of the first arc surface, when the distance between the other wall and the center of the first arc surface When the distance is represented by L and the radius of curvature of the second arc surface is represented by R ₂ , the relationship of L≥2 R ₂ is satisfied.

The reed teeth are generally formed by stamping, and then the weft guide grooves are ground with a grinding wheel in a state where a plurality of reed teeth are overlapped. The first arcuate surface intersects the other of the top wall surface and the inner wall surface at an acute angle, and the space side (that is, the press die side, the grinding wheel side) forms an obtuse angle. Thus, in the manufacture of reed teeth, even if the radius of curvature of the second arcuate surface is small, the second arcuate surface can be easily press-formed, and the grinding wheel can be fully bonded with the second arcuate surface. Contact, achieve grinding. Thus, for each reed, uniform weft guide grooves of good surface roughness without variation can be obtained without damaging the warp and weft.

The present invention is characterized in that when the height of the inner wall surface is represented by H and the radius of curvature of the second arcuate surface is represented by R ₁ , the relationship 2H≥2 R ₁ ≥H is satisfied.

The "height of the inner wall" as used herein refers to the length of a line segment connecting the intersection of the extension of the top wall and the extension of the inner wall and the intersection of the extension of the inner wall and the extension of the bottom wall.

Another aspect of the present invention relates to a reed for an air-jet loom, which has a weft guide groove opened in a U-shape on the weaving side, and is characterized in that, in the weft guide groove, the top The wall surface and the inner wall surface are planar respectively, and the inner part side top angle surface connecting the above-mentioned top wall surface and the inner wall surface includes a plane, and the intersection angle θ between the plane and the top wall surface is _the same as the intersection angle θ between the above-mentioned plane and the inner wall surface ₄ different.

Since the planes of the inner side top corners form different intersecting angles with the top wall and the inner wall respectively, so in terms of cross-sectional shape, the cross-sectional area of the inner side top corners can be increased without making the weft guide groove The inside is narrowed to make the plane longer. Since the ejected air from the sub-nozzle collides with the inner corner face of the larger plane, the direction of reflection is stabilized. Therefore, due to the difference in the spraying direction of each sub-nozzle juxtaposed along the weft-entry direction, the degree of collision of the sprayed air toward the top wall surface near the inner side corner, the inner side corner face, and the inner wall surface does not produce a greater degree of collision. There is a large difference, and the direction of the reflected air does not produce a large difference. Then, the air flow of each sub-nozzle at the weft guide groove is stabilized, and the flying-off of the weft is stabilized.

Still another form of the present invention is characterized in that the intersecting angle _θ4 between the above-mentioned flat surface and the inner wall surface is higher than the intersecting angle _θ3 between the above-mentioned flat surface and the top wall surface by 10° or more.

Still another aspect of the present invention is characterized in that the intersection angle _θ3 between the above-mentioned plane and the top wall surface is higher than the intersection angle _θ4 between the above-mentioned plane and the inner wall surface by more than 10°.

Description of drawings

Fig. 1 is an enlarged sectional view showing a first embodiment of a reed for an air jet loom according to the present invention;

Fig. 2 is an enlarged sectional view showing a second embodiment of the reed for an air jet loom according to the present invention;

Fig. 3 is an enlarged sectional view showing a third embodiment of the reed for an air jet loom according to the present invention;

Fig. 4 is an enlarged sectional view showing a fourth embodiment of the reed for an air jet loom according to the present invention;

Fig. 5 is an enlarged sectional view showing a fifth embodiment of the reed for an air jet loom according to the present invention;

Fig. 6 is an enlarged sectional view showing a sixth embodiment of the reed for an air jet loom according to the present invention;

Fig. 7 is an enlarged sectional view showing a seventh embodiment of the reed for an air jet loom according to the present invention;

Fig. 8 is an enlarged sectional view showing an eighth embodiment of the reed for an air jet loom according to the present invention;

Fig. 9 is an enlarged sectional view showing a ninth embodiment of the reed for an air jet loom according to the present invention;

Figure 10 is a view of the air jet loom reed of the present invention viewed from the weft entry direction;

FIG. 11 is a right side view of FIG. 10 .

Detailed ways

As shown in FIG. 10 or FIG. 11, in the reed 1 for an air-jet loom, a plurality of reed teeth 2 are arranged side by side along the flying direction of the weft yarn in the state of standing up, and the reed teeth 2 The reed gripper 5 is fixed in the upward groove 4 of the reed gripper 3 . In addition, on the weaving side of the above-mentioned reed clip 3, sub-nozzle holders 6 are installed at intervals along the weft entry direction, and the sub-nozzles 7 fixed on the sub-nozzle holder 6 are guided toward the weft yarn provided at the height middle part of the reed 1. Slot 8 injects air. The axial angle _θ of the air sprayed from the front portion of the sub-nozzle 7 is such that the reed 1 is tilted upwards based on the horizontal direction while the reed 1 is stationary in the vertical direction, and the specific value is: 6 °≤θ ₀ ≤12°.

Fig. 1 shows the 1st embodiment of reed 1, and weft guide groove 8 is U-shaped opening on the weaving side, and it is by inner wall surface 9, top wall surface 10, bottom wall surface 11, connects the inner part of inner wall surface 9 and top wall surface 10 Side top angle surface 12, inner side bottom angle surface 13 connecting inner wall surface 9 and bottom wall surface 11, fabric side top angle surface 14 connected with top wall surface 10, and fabric side bottom angle surface connected with bottom wall surface 11 15 poses.

With the reed 1 stationary in the vertical direction, the top wall surface 10 is formed by a horizontal plane, and the inner wall surface 9 is formed by a vertical plane. In addition, the back-side corner surface 12 is formed so that the first arcuate surface 16 and the second arcuate surface 17 are connected to each other. The first arc surface 16 is connected to the top wall surface 10, and the intersection angle θ ₁ =0°. The second arc surface 17 is connected to the top wall surface 9, and the intersection angle θ ₂ =0°. The radius of curvature R 1 of the first arc surface ₁₆ = 4 mm, the radius of curvature R ₂ of the second arc surface 17 = 1 mm, the height H of the inner wall surface 9 = 5.5 mm, and the center of the inner wall surface 9 and the first arc surface 16 The distance between L=3mm. In addition, since 2H=11, 2R ₁ =8, and H=5.5, the relationship of 2H≥2R ₁ ≥H is satisfied. Since L=3 and 2R ₂ =2, the relationship of L≧2R ₂ is also satisfied. The corresponding extended surfaces of the inner wall surface 9 and the first arc surface 16 intersect each other, and the intersecting angle θ ₂ =arccos3/4=41°.

Since 2R ₁ ≥ H, the first arcuate surface 16 can be formed into a very similar plane, and the inconsistency of each sub-nozzle in the direction of the reflected air at the tip portion on the back side can be suppressed, and the flying of the weft yarn can be stabilized. Since 2H≥2R ₁ , that is, H≥R ₁ , the intersection angle between the first arcuate surface 16 and the inner wall surface 9 forms a smaller acute angle, and therefore, the space side becomes a larger obtuse angle. Therefore, although the radius of curvature of the second arcuate surface 17 is as small as 1 mm, press forming and grinding are not difficult, and the production of reed teeth is easy. Since L≥2R ₂ , the radius of curvature of the second arc surface 17 is smaller than the radius of curvature of the first arc surface 16, and the corner surface 12 on the inner side occupies most of the first arc surface 16, and the approximate plane becomes larger. way to form. In order to obtain a sufficient effect that the first arcuate surface 16 and the inner wall surface 9 sufficiently intersect each other as compared with the connection of the prior art, the condition of 0.9R ₁ ≥ L must be required. Since this method is adopted, when θ ₂ =26°, the intersection angle θ ₂ is sufficiently large. In terms of the cross-sectional shape, the cross-sectional area of the top end on the inner side does not become larger, and the inner portion of the weft guide groove 8 does not become narrower.

Since the intersection angle θ ₂ between the first arc surface 16 and the inner wall surface _{9 = 41°, the intersection angle θ 1 between the first arc surface 16 and the top wall surface 10 = 0°, θ 2 >} θ ₁ , so The ejected air colliding with the front end surface on the back side is directed toward the weft entry direction and below the weft guide groove 8, and the air flow toward the open side of the weft guide groove 8 is reduced. Then, the number of weft entry failures caused by jumping out of the weft yarn from the weft guide groove 8 and the stoppage of the loom caused thereby are reduced.

In the second embodiment of the present invention, as shown in FIG. 2, the planar top wall surface 10 is adapted to the weft guide groove 8 inclined downward toward the open side. Same as the first embodiment, the inner part side corner surface 12 is composed of a first arc surface 16 connected with the top wall surface 10 and a second arc surface 17 connected with the planar inner wall surface 9, the first arc surface 16 and the second arc surface 17 are connected to each other. The radius of curvature R ₁ of the first arc surface 16=4mm, the radius of curvature R ₂ of the second arc surface 17=1.5mm, the distance L=3mm between the inner wall surface 9 and the center of the first arc surface 16, L= 2 R ₂ , satisfying the relationship of L≧2 R ₂ , most of the top-side corner face 12 is formed by an approximate plane.

In the 3rd embodiment of the present invention, as shown in Fig. 3, same as the 1st embodiment, the inner part side apical surface 12 is connected by the 1st arcuate surface 16 connected with the planar top wall surface 10 and with the 1st embodiment. The second arcuate surface 17 connected to the planar inner wall surface 9 is constituted, and the first arcuate surface 16 and the second arcuate surface 17 are mutually connected. The radius of curvature R ₁ of the first arc surface 16 = 4 mm, the radius of curvature R ₂ of the second arc surface 17 = 0.5 mm, and the distance L between the center of the inner wall surface 9 and the center of the first arc surface 16 = 2 mm. The cross-sectional area of the corner surface on the top side is small, the inside of the weft guide groove 8 becomes wider, and the first arcuate surface 16 , which is a substantially flat surface, occupies most of the corner surface 12 on the back side.

In the 4th embodiment of the present invention, as shown in Fig. 4, same as the 1st embodiment, the inner part side apical surface 12 is connected by the 1st arcuate surface 16 connected with the planar top wall surface 10 and with the 1st embodiment. The second arcuate surface 17 connected to the planar inner wall surface 9 is constituted, and the first arcuate surface 16 and the second arcuate surface 17 are mutually connected. The radius of curvature R 1 of the first arc surface ₁₆ = 4 mm, the radius of curvature R ₂ of the second arc surface 17 = 1.8 mm, and the distance L between the center of the inner wall surface 9 and the center of the first arc surface 16 = 3.6 mm. L=2 R ₂ satisfies the relationship of L≥2 R ₂ , and L=0.9 R ₁ satisfies the relationship of 0.9 R ₁ ≥L, and the intersection angle θ ₂ =arccos(L/R ₁ )=26°. Accordingly, in terms of the cross-sectional shape, the cross-sectional area of the front end on the back side does not increase, and the back of the weft guide groove 8 does not become narrow.

In the fifth embodiment of the present invention, as shown in FIG. 5 , different from the first to fourth embodiments, the inner corner surface 12 is formed by a first arcuate surface connected to the planar top wall surface 9 . 16 and a second arcuate surface 17 connected to the planar inner wall surface 10, and the first arcuate surface 16 and the second arcuate surface 17 are connected to each other. The radius of curvature R ₁ of the first arc surface 16 = 4 mm, the radius of curvature R ₂ of the second arc surface 17 = 1 mm, and the distance L between the center of the inner wall surface 10 and the center of the first arc surface 16 = 3 mm. _The intersection angle θ ₁ between the first arc surface 16 and the top wall surface 10 =41°, the intersection angle θ 2 between the first arc surface 16 and the inner wall surface 9 =0°, θ ₁ >θ ₂ . According to the weaving process conditions, when beating up, the weaving front of the woven fabric moves up and down, but even in this case, the woven fabric is still not connected to the inner side corner surface 12, and will not be damaged by contact.

In the 6th embodiment of the present invention, as shown in Figure 6, relative to the 1st embodiment, the inner part side corner surface 12 is only formed by the 1st arcuate surface 16, and the 1st arcuate surface 16 and the top wall surface 10, the inner wall surface 9 is not intersected with the extended surface, but with the actual surface. Since the space side of the intersecting portion is an obtuse angle, the second arcuate surface 17 is not formed, and press forming and grinding can be performed. Since the inner part side corner surface 12 is only formed by the first circular arc surface 16 which is approximately flat, it is possible to further suppress the inconsistency of each sub-nozzle in the direction of the reflected air on the inner part side top surface, and it is possible to make the weft yarn fly away. more stable.

In the 7th embodiment of the present invention, as shown in Figure 7, relative to the 1st embodiment, the inner part side corner surface 12 is only formed by the 1st arcuate surface 16, and the 1st arcuate surface 16 and the inner wall surface 9, the top wall surface 9 is not intersected with the extended surface, but with the actual surface. Since the space side of the intersecting portion is an obtuse angle, the second arcuate surface 17 is not formed, and press forming and grinding can be performed. Since the inner part side corner surface 12 is only formed by the first circular arc surface 16 which is approximately flat, it is possible to further suppress the inconsistency of each sub-nozzle in the direction of the reflected air on the inner part side top surface, and it is possible to make the weft yarn fly away. more stable.

In the 8th embodiment of the present invention, as shown in Figure 8, the interior side corner surface 12 is formed by the plane 18, and the interior side corner surface 12 intersects with the top wall surface 10 with a crossing angle θ ₃ , and the interior The wall surface 9 intersects at an intersection angle _θ4 , and connects the plane 18 and the top wall surface 10 and the plane 18 and the inner wall surface 9 through two corresponding arc surfaces. Crossing angle θ ₃ =20°, crossing angle θ ₄ =70°, θ ₄ −θ ₃ =50°≥10°. The inner side corner surface is formed by a plane, and the intersection angle is different, and the inner side corner surface can be formed with a smaller cross-sectional area while maintaining the length of the plane in terms of cross-sectional shape. The inside of weft guide groove 8 is not narrow, and weft yarn is not easy to jump out. Due to the collision with the larger plane, the reflection of the jet air from the sub-nozzles 7 is more stable, the air flow of each sub-nozzle is stable, and the flying away of the weft yarn is more stable. Since θ ₄ -θ ₃ ≥ 10°, the intersecting angle θ ₄ with the inner wall surface 9 is more than 10° higher than the intersecting angle θ ₃ with the top wall surface, so the jet air colliding with the top end of the inner side is directed towards the wefting direction, And toward the lower side of the weft guide groove 8, the air flow toward the open side of the weft guide groove 8 decreases. Then, the number of weft entry failures caused by jumping out of the weft yarn from the weft guide groove 8 and the stoppage of the loom caused thereby are reduced.

In the 9th embodiment of the present invention, as shown in Figure 9, the interior side corner surface 12 is formed by the plane 18, and the interior side corner surface 12 intersects with the top wall surface 10 at an intersection angle θ ₃ , and The wall surface 9 intersects at an intersection angle _θ4 , and connects the plane 18 and the top wall surface 10 and the plane 18 and the inner wall surface 9 through two corresponding arc surfaces. Crossing angle θ ₃ =70°, crossing angle θ ₄ =20°, θ ₃ −θ ₄ =50°≥10°. Since the intersecting angle θ ₃ with the top wall surface 10 is higher than the intersecting angle θ ₄ with the inner wall surface by more than 10°, so according to the weaving process conditions, when beating up, the weaving front of the woven fabric moves up and down, but even in such a Under normal circumstances, the woven cloth is still not in contact with the inner side corner surface 12, and will not be damaged due to contact.

Effect of the present invention

In the present invention, since the two intersecting angles are different, as described above, due to the difference in the spraying directions of the sub-nozzles arranged in parallel along the weft-entry direction, the jets toward the top wall surface near the corner of the inner side and the inner side top There is no large difference in the degree of collision of the jetted air between the corner surface and the inner wall surface, and there is no large difference in the direction of the reflected air. Therefore, the airflow of each pair of nozzles in the weft guide groove is stabilized, and the flying of the weft is stabilized.

According to another feature of the present invention, since the intersection angle between the inner side corner surface and the inner wall surface is greater than the intersection angle between the inner side corner surface and the top wall surface, the jet colliding with the inner side corner surface More air is reflected from the bottom of the weft guide groove, and less air is sprayed toward the open groove. As a result, the jumping out of the weft yarn from the weft guide groove is reduced, and the flying of the weft yarn is stabilized.

According to another feature of the present invention, since the intersection angle between the inner side top angle surface and the top wall surface is greater than the intersection angle between the inner side top angle surface and the inner wall surface, according to the weaving process conditions, when beating up, the weaving The vicinity of the weaving front of the cloth moves up and down, but even in this case, the weaving cloth still does not come into contact with the inner side top corner surface 12, and will not be damaged by the contact.

According to another feature of the present invention, since L≥2R ₂ , in the inner corner surface, the first arc surface with a larger radius of curvature occupies the majority, and the approximate plane formed by the first arc surface is larger. , The flying away of the weft is stable. The corner surface on the inner side is connected to the two surfaces of the top wall surface and the inner wall surface, so that the weft and warp yarns are not damaged.

According to still another feature of the present invention, since 2R ₁ ≥ H, the first arcuate surface can be formed by a very similar plane. In addition, since 2H≥2R ₁ , the intersection angle between the wall connected to the second arc surface and the first arc surface is a smaller acute angle, and the space side is a larger obtuse angle, making it easier to form the second arc noodle.

In another form of the present invention, since the plane of the inner side top corner surface forms different intersection angles with the top wall surface and the inner wall surface respectively, in terms of cross-sectional shape, the cross-sectional area of the inner side top corner can be increased. , without narrowing the inside of the weft yarn guide groove, making the plane longer and allowing the plane to be larger. Since the jet air from the sub-nozzle collides with a larger plane, the direction of reflection is stabilized. Then, due to the difference in the ejection direction of each of the sub-nozzles juxtaposed in the wefting direction, the degree of collision of the ejected air toward the top wall surface in the vicinity of the inner side corner, the inner side corner face, and the inner wall surface does not occur. Larger differences, the direction of the reflected air does not make a larger difference. Therefore, the airflow of each pair of nozzles in the weft guide groove is stabilized, and the flying of the weft is stabilized.

According to another form of the present invention, since the angle of intersection between the plane and the inner wall is higher than the angle of intersection between the plane and the top wall by more than 10°, most of the jet air colliding with the inner side top angle faces Below the weft guide groove, the amount of jet air toward the open side decreases, thereby reducing the jumping of the weft yarn from the weft guide groove, and stabilizing the flying of the weft yarn.

According to the feature of another form of the present invention, since the angle of intersection between the plane and the top wall is higher than the angle of intersection between the plane and the inner wall by more than 10°, according to the weaving process conditions, when beating up, the weaving It moves up and down near the front of the weaving, but even in this case, the weaving fabric does not touch the flat surface and does not cause damage.

Claims (8)

1. A reed for an air-jet loom, the reed for an air-jet loom has a weft guide groove (8) that the weaving side is U-shaped and open, and is characterized in that: In the above-mentioned weft guide groove (8), the top wall surface (10) and the inner wall surface (9) are respectively planar, and the inner side corner surface (12) connecting the above-mentioned top wall surface (10) and the inner wall surface (9) includes 1st arcuate surface (16), this 1st arcuate surface (16) intersects with above-mentioned two wall surfaces (9,10) respectively with the intersection angle more than 0 °, above-mentioned 1st arcuate surface (16) and top wall surface ( 10) is different from the intersection angle (θ ₂ ) between the first arcuate surface (16) and _the inner wall surface (9). 2. The reed for an air-jet loom according to claim 1, characterized in that the intersection angle (θ ₂ ) between the first arcuate surface (16) and the inner wall surface (9) is greater than that of the first circle The intersection angle (θ ₁ ) between the arc surface (16) and the top wall surface (10). 3. The reed for an air-jet loom according to claim 1, characterized in that the intersecting angle (θ ₁ ) between the first arcuate surface (16) and the top wall surface (10) is greater than that of the first circle The intersection angle (θ ₂ ) between the arc surface (16) and the inner wall surface (9). 4. The reed for an air-jet loom according to any one of claims 1 to 3, characterized in that the first arcuate surface (16) of the apex surface (12) on the inner part side and the above-mentioned One of the top wall surface (10) and the inner wall surface (9) is connected according to a cross angle of 0°, and a second arc surface (17) is provided, and the second arc surface (17) is connected to the above-mentioned first arc surface. The surface (16) is connected and connected with the other surface (9, 10), and the above-mentioned inner side corner surface (12) is formed by the first arc surface (16) and the second arc surface (17); The above-mentioned 2nd arc surface (17) is connected with the other one of the above-mentioned top wall surface (10) and the inner wall surface (9) according to the mode that the intersection angle is 0°, and the curvature radius (R) of the 2nd arc surface (17) ₁ ) smaller than the first arc surface (16); When the distance between the other wall surface (9, 10) and the center of the first arc surface (16) is represented by L, and the radius of curvature of the second arc surface (17) is represented by R ₂ , then L≥2 _R2 relationship. 5. The air jet loom reed according to claim 4, characterized in that, when the height of the above-mentioned inner wall surface (9) is represented by H, and the radius of curvature of the second arc surface (16) is represented by _R1 , then the relationship of 2H≥2 R ₁ ≥H is satisfied. 6. A reed for an air-jet loom, the reed for an air-jet loom has a weft guide groove (8) that is opened in a U-shape on the weaving side, and is characterized in that: In the above-mentioned weft guide groove (8), the top wall surface (10) and the inner wall surface (9) are respectively planar, and the inner side corner surface (12) connecting the above-mentioned top wall surface (10) and the inner wall surface (9) includes The plane (18), the intersection angle (θ ₃ ) between the plane (18) and the top wall surface (10) is different from the intersection angle (θ ₄ ) between the above-mentioned plane (18) and the inner wall surface (9). 7. The reed for air-jet loom according to claim 6, characterized in that, the intersecting angle (θ ₄ ) between the above-mentioned plane (18) and the inner wall surface (9) is larger than that of the above-mentioned plane (18) and the top wall surface The intersection angle (θ ₃ ) between (10) is more than 10° higher. 8. The reed for an air-jet loom according to claim 6, characterized in that the intersection angle (θ ₃ ) between the above-mentioned plane (18) and the top wall surface (10) is larger than that of the above-mentioned plane (18) and the inner wall surface The intersection angle (θ ₄ ) between (9) is more than 10° higher.

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