JPH01266243A - Dent for air jet loom and production thereof - Google Patents

Abstract

PURPOSE:To obtain the subject dents capable of stably flying a weft yarn, by using end faces of recessed parts formed in dents as surfaces for throttling an air stream and the end faces of bottom edges as surfaces in the direction to diffuse the air stream. CONSTITUTION:The end faces of upper jaw edges 6 of recessed parts of dents 1 are tilted in the direction to throttle air streams and the end faces of the bottom edges 7 are tilted in the direction to diffuse the air streams. The end faces of the bottom edges 7 act so that the air may escape from the slits 9 between the dents to the back side of the reed. Thereby, the disturbance of the air in air guides 5 can be reduced without producing strong air streams deflected to the side of the cloth fell in the air streams passing through the air guides 5.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a reed feather for an air jet loom and a method for manufacturing the same.

(Prior art) The reed feathers 1 of the air agent loom are provided with a recess 3 on the front side of the fabric, and the weft 4 sent out by the air jet from the main nozzle is passed through the recess of the juxtaposed reed feathers. It flies through the groove-shaped air guide 5 that is formed. This air guide is provided to prevent the air jet from dispersing and allow the weft to fly stably.
It is thought that it is better to make the end face sloped in the direction of constricting the air jet.
As shown in Figure 0.11, the end surface 6a of the mandibular rim 6 around the recess 3, the bottom! ! The end face 7a of the lower jaw edge 8 and the end face 8a of the mandibular edge 8 are all inclined in the direction of restricting the air jet.

However, even if such an air guide 5 is provided, a decrease in the weft conveying force due to a decrease in the flow velocity of the air jet cannot be avoided, so in order to assist this, a weft is inserted into the air guide from the fabric front side slightly diagonally upward. Safrizzle 1 that sprays air
4 (Fig. 8.9) is usually provided.

In addition, conventional reed blades are manufactured by cutting them into a predetermined shape by press punching, then assembling them into a reed and shaping the wall surface of the air guide. In order to make the end faces 6a, 7a, and 8a a predetermined slope, the end faces around the recess are shaped by face punching after press punching, or a method is adopted in which the slope is created by changing the cutting conditions during press punching. .

(Problem to be solved by the invention) However, in conventional reeds, when the jet flow from the main nozzle or sub-nozzle is strengthened to increase the weft conveying force, the flight of the weft is disturbed, and the weft in flight is forced to be guided by the air. There was a problem where it was easy to fall outside. The present invention was made with the aim of solving this problem, and its object is to obtain a reed feather for an air jet loom that allows the weft to fly more stably.

(Means for Solving the Problem) Therefore, in this invention, the end surface 6a of the upper jaw edge 6 of the recess 3 provided in the reed feather 1 is a surface in the direction of restricting the air flow, and the end surface 7a of the bottom edge 7 is a surface that restricts the air flow. The above problem is solved by using a surface in the direction of diffusion.

In the method for manufacturing reed blades of the present invention, the end faces 6a and 7a of the recesses of the reed blades are shaped by grinding, and the grinding process involves cutting a thin plate into a predetermined shape by press punching or the like using a grinding wheel. a first axis 1 perpendicular to the axis of 11;
2 directions, and if necessary, a second parallel to the axis.
The end surface 7a of the recess 3 is tilted simultaneously around the axis 13 of the recess 3,
8a is ground.

(Function) In the conventional air guide formed of reed feathers, the end surfaces 6a, 7a, and 8a of the recessed periphery of each reed feather were all inclined in the direction of narrowing the air jet. Airflows from three directions deflected in the direction of the center line collide with each other, causing turbulence.Moreover, the airflow deflected by the inclined surface 7a of the bottom edge 7 heads toward the opening side of the air guide 5, so that the weft yarn in flight 4 to fly out from the air guide 5. In particular, the jet from the sub nozzle is
As shown in the figure, the air guide is deflected downward along the slope of the maxillary edge 6 while the bottom! ! 7, and then deflected toward the fabric front side by the inclined surface 7a of the bottom edge 7, the air flow strongly acted in the direction of causing the weft yarns 4 to fly out.

On the other hand, in the air guide formed by the reed feathers of the present invention, the end surface 7a of the bottom edge 7 of each reed feather acts to release air from the slit 9 between the reed feathers to the back side of the reed. , without generating a strong airflow deflected toward the fabric side during the airflow passing through the air guide 5, and by alleviating the collision of the airflow within the air guide 5, reducing air turbulence, 4 can fly stably without flying out from the air guide 5.

In addition, in the conventional manufacturing method of reed feathers, the end surface 6a of the periphery of the recess is
,? It was difficult to shape a and 8a accurately without variation, but according to the above manufacturing method, the end face of the periphery of the recess of the recess can be processed into an accurate surface as designed, and the recess can be shaped accurately. It is possible to prevent the occurrence of air turbulence due to errors or variations in the shape of the end face, and the end face can be smoothly moved from the constriction direction surface to the diffusion direction surface in the transition part from the upper jaw to the bottom of the recess. It is possible to obtain an ideal shape of transition, and it is possible to obtain reed feathers that cause less air turbulence within the air guide. Moreover, according to this manufacturing method, the end faces of the upper jaw edge and the end face of the bottom edge of a large number of feathers can be processed simultaneously in one step.

(Embodiment) Figures 1 to 4 are views showing an embodiment of a reed equipped with reed feathers of the present invention, in which Fig. 1 is a side view of the reed feather, and Figure 2 is a partial front view of the reed. , FIG. 3 is an enlarged sectional view of section A in FIG. 1, and FIG. 4 is an enlarged sectional view of section B.

The reed feathers 1 have recesses 3 on the front side 2 thereof, and air guides 5 for guiding the weft yarns 4 are formed in the recesses 3 of the juxtaposed reed feathers 1. The recess 3 is approximately U-shaped and has an end face 6a of the upper jaw edge 6, an end face 7a of the bottom edge 7, and an end face 8 of the lower jaw edge 8.
As shown in Fig. 3.4, a is a surface inclined with respect to the direction of passage of the air flow X. The direction of inclination of the surface is
The end surface 6a of the maxillary edge 6 and the end surface 8a of the mandibular edge 8 are connected to the air flow
The direction in which the downstream side of the air flow X becomes higher toward the center line of the air guide (positive taper), and the end surface 7a of the bottom edge 7 is in the direction in which the downstream side of the air flow X becomes lower away from the center line of the air guide 5 (reverse taper). It is. The inclination angles α, β1 . γ is, for example, 3 degrees to 5 degrees, but this angle also changes depending on the distance between the slits 9 between the feathers, and when the distance between the slits 9 is large, the end surface 7a of the bottom edge
It is possible to guide the air flow in the direction of diffusion in this part without having to reverse the taper. On the other hand, the end surface 6a which is similar to the above shows the air flow X from the sub-nozzle 14 (see FIG. 9).
In order to guide the air in the direction along the air guide 5, as the gap between the slits 9 becomes larger, the degree of inclination of the positive taper must be increased, and a positive taper is always obtained. Further, the end surface 8a of the lower jaw edge is preferably tapered in a positive direction for boat fishing in order to prevent the flying weft 4 from being deflected downward due to gravity.

Figures 5 to 7 are diagrams showing an embodiment of the method for manufacturing reed feathers of the present invention, in which a large number of reed feathers 1 cut into predetermined shapes by press punching are stacked and fixed. However, the state in which the edges 6a and 7a of the recess 3 are being ground by the grinding wheel 11 is shown. Osaha 1... is the grinding wheel 11
The first axis 12, which is orthogonal to the axis iY of Axis 13
It is fixed so as to be inclined counterclockwise by an angle corresponding to the inclination angle β of the end face of the bottom edge when viewed from below the reed feather. This fixing may be done by clamping the reed feathers using a jig or the like.

A large number of reed blades 1... are fixed in a stacked state in this manner, and the end face 6a of the upper jaw edge and the end face 7a of the bottom edge of the recess 3 are ground with the grinding wheel 11, and further as shown in FIG. As shown by the lines, the reed blades 1 are tilted in the opposite direction around the first shaft 12 while keeping the direction of inclination around the second shaft 13 unchanged, and the end face 7a of the bottom edge of the recess is cut using the grinding wheel 11. and the end face 8a of the mandibular rim, and then by barrel polishing to round the ridgeline and smooth the surface, the recess 3 with the end face shape shown in Fig. 3.4 can be made into a recess. 1.

(Effects of the Invention) In the reed assembled using the reed feathers of this invention, the upper jaw surface of the air guide guides air in the direction of constricting the air jet, and the bottom surface partially diffuses the air jet to the back side of the reed to the weaving side. Since it acts to suppress the generation of airflow in the air guide, the turbulence of the air inside the air guide is suppressed, and the weft threads fly smoothly, and the weft threads are also prevented from flying out of the air guide through the opening on the fabric front side. It disappears.

Further, according to the manufacturing method of the present invention, the end face of the recess periphery of the reed feather that forms the air guide is shaped with an accurate shape and inclination angle, and the occurrence of processing errors and variations is avoided.
The direction of the airflow passing through the air guide can be precisely controlled, making it possible to generate the airflow within the air guide as intended at the design stage, providing a reed that allows for more stable weft insertion. can do.

[Brief explanation of the drawing]

1 to 4 are views showing an embodiment of a reed provided with reed feathers of the present invention, in which FIG. 1 is a side view of the reed feather, FIG. 2 is a partial front view of the reed, and FIG. 3 is a partial front view of the reed. 1 is an enlarged sectional view of section A in FIG. 1, and FIG. 4 is an enlarged sectional view of section B. Figures 5 to 7 are views showing the recesses of the reed feathers being ground by the method of this invention, with Figure 5 being a side view, Figure 6 being a front view, and Figure 6 being a front view.
FIG. 7 is a view seen from below in FIG. 6. FIGS. 8 and 9 are explanatory diagrams showing the relationship between the air jets from the sub-nozzles and the air guides. Figures 10 and 11 are diagrams showing the end face shape of the concave part of the conventional reed feather.
In the figure, FIG. 11 is a diagram corresponding to FIG. 4, respectively. In the figure, 3: Recess 5: Air guide 6: Maxillary margin 6a: End surface of maxillary margin 7: Bottom edge

Claims (3)

[Claims] (1) In a reed feather for an air jet loom in which a recess (3) forming an air guide (5) for guiding the weft insertion airflow is provided on the front side of the reed feather (1), the recess (3) is characterized in that the end surface (6a) of the maxillary edge (6) is a surface in the direction of constricting the airflow, and the end surface (7a) of the bottom edge (7) is a surface in the direction of diffusing the airflow. Reed feathers for air jet loom. (2) A step of cutting the thin plate into a shape having a recess (3) on the front side of the fabric, and processing the end surfaces (6a), (7a), and (8a) around the recess by grinding, and the grinding 2. The method of manufacturing reed blades according to claim 1, wherein the thin plate to be ground is ground while being inclined around an axis (12) perpendicular to the axis of the grinding wheel (11). (3) A step of cutting the thin plate into a shape having a recess (3) on the front side of the fabric, and processing the end surfaces (6a), (7a), and (8a) around the recess by grinding, and the grinding The thin plate to be ground is rotated around a first axis (12) perpendicular to the axis of the grinding wheel (11) and a second axis (12) parallel to the axis of the grinding wheel (11).
3) The method for manufacturing reed feathers according to claim 1, characterized in that the reed feathers are ground at an angle at the same time as the circumference.