JPS6014865B2 - Weft insertion device in jet loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weft insertion device for a jet loom, which is provided with an auxiliary nozzle for injecting an auxiliary fluid and a large number of guide pieces for guiding the auxiliary fluid and the weft on a slay.

This type of striping device has the advantage that stable weft insertion can be performed because the auxiliary nozzle is easy to install.

However, when attempting to increase the weft insertion speed, increasing the fluid velocity not only does not increase the flying speed of the weft yarn, but also results in hindering the stability of weft insertion. That is, in this conventional device, as shown in FIGS. 1 to 4, the guide wall 6 of the guide piece 4 has a planar shape such that its upper part 6a, lower part 6b, and inner part 6c all extend in the striping direction.
The auxiliary fluid injected from the auxiliary nozzle 5 has a strong function of imparting stability to weft insertion, but its ability to increase the flying speed of the weft yarn is greatly inhibited, and as a result, no matter how much the flow speed is increased, the weft insertion speed remains Not only did this not improve the performance, but it also hindered the stability of weft insertion.

More specifically, in this device, as shown in FIG. 4, the auxiliary fluid injected from the auxiliary nozzle 5 is radially diffused from the injection port 7.

If the streamline at the highest flow velocity position is indicated by a, the flow velocity decreases as the distance from a increases. The streamline a is located at the upper part 6a and lower part 6b of the guide wall 6 of the guide piece 4 at the mouth position.
Then, it collides with the twilling side corner of the inner part 6c and is reflected at a predetermined angle in the striping direction.

The part 6a of the guide wall 6 of the guide piece 4 of the streamline b
, 6b, 6c on the opposite side of weft insertion and also flows in the twilling direction. The streamline e flows in the striped direction without colliding with the guide piece 4 of the mouth. However, the streamline d passes through the corners of the three parts 6a, 6b, and 6c of the guide wall 6 in A, and collides with the side surface of the guide piece 4 at the mouth, so all of them are behind the guide piece 4 and It will leak up and down.
Therefore, all the fluid in the range A between a and d becomes leakage fluid and flows up and down behind the guide piece 4, and is not effective for flying the silk thread.

Therefore, a device has been previously proposed which aims to eliminate the drawbacks of the conventional device and achieve a higher weft insertion speed while maintaining the stability of stripe insertion.

That is, the guide piece 4 of this device is formed in an oblique shape in which the three portions 6a, 6b, and 6c of the guide wall 6 all converge in the weft insertion direction, as shown in FIGS. 5 to 8.

In this device, streamlines a, b and e are shown in FIG.
Regarding the flow, the flow is in the same direction as the previous model with stripes.

However, the streamline a corresponds to each part 6a, 6b of the mouth guide wall 6,
6c, and the streamline c, which has a relatively high flow velocity near the streamline a position, collides with the striped side corners of each part 6a, 6b, and 6c of the guide wall 6 at the mouth position. and flows in the weft insertion direction. Therefore, the leakage fluid area A behind the guide piece 4 and above and below in the streamlines c to d is extremely reduced, and especially the fluid near the position where the flow velocity is high required to increase the striping speed, that is, near the streamline a. Since all the fluid flows in the striping direction, the efficiency of using the fluid to increase the weft flying speed using the auxiliary fluid is extremely high, making it possible to further increase the total feeding speed. However, in this device, due to the decrease in leakage fluid, the force for attaching the striped yarn to the guide wall 6 side becomes weaker, resulting in a decrease in the stability of striping.In addition, each part 6a, 6b, and 6c of the guide wall 6 are all sloped surfaces. As a result, the reflection angle of the fluid becomes large, and the reflected fluid pushes all the threads toward the opening □ of the guide piece 4, resulting in a defect that the stability of twilling is greatly hindered.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a striping device for a jet loom that eliminates the above-mentioned drawbacks of the two devices and can further increase the striping speed while maintaining the stability of weft insertion. It is said that

An embodiment embodying the present invention will be described below with reference to FIG. 9 and subsequent figures.

9 and 10 schematically show a jet loom to which the present invention is applied, and 1 is a slay fixed to a slace word 2 which reciprocates in the direction of the arrow by a drive mechanism (not shown). . A coin 3, a guide piece 4, and an auxiliary nozzle 5 are arranged on the sleigh 1. Guide piece 4 is the 10th
As shown in the figure, many are arranged in parallel in the striped direction.
A guide section for fluid and striped thread is formed by the guide wall 6 which is semi-open on the side of the stripe. Further, the auxiliary nozzles 6 are vertically arranged corresponding to the guide wall 6 of the guide piece 4 at predetermined intervals, and the fluid injection ports 7 thereof are in the striping direction and at the inner part of the guide wall 6, like the auxiliary nozzle. Opening for 6c. Therefore, the weft Y of the cheese 8 fixedly provided on the side of the machine
is fed out by the long side rollers 9, 101, temporarily stored in the storage device 11, passes through the braking device 12, and reaches the main nozzle 13. At the same time as the fluid is injected from the main nozzle 13, the weft yarn Y is also flown, and the same striped yarn Y is attached to the guide piece 4.
The stripes are formed along the guide wall formed by the auxiliary nozzle 5 while the flying force is maintained by the auxiliary fluid from the auxiliary nozzle 5. When the thread 1 is rotated in the direction of the arrow, the guide piece 4 and the auxiliary nozzle 5 are separated from the warp W as shown by the two-dot chain line in FIG. be done.

Note that 15 is a temple device. 11 to 13 show an embodiment of the guide piece 4 constructed according to the present invention, in which the upper part 6a and the lower part 6b of the two parts 6a, 6b, and 6c of the guide wall 6 are on the side in the striping direction. Only the inner part 6c extends straight in the full insertion direction.

The inner part 6c is formed as a straight wall surface in the vertical direction. Note that the lower part 6b of the guide wall 6 is also inclined downward, in order to prevent the guide piece 4 from catching the warp when it enters the warp opening □. Next, the operation and effect of the above device will be explained with reference to FIGS. 14 and 15.

In this device, since the upper part 6a and the lower part 6b of the guide wall 6 are inclined, the air flow toward the upper or lower part of the guide wall has its central streamline a at the upper part of the guide wall 6, as shown in FIG. 6a and the lower part 6b, the flow collides with their central parts, and the striped side corners of the upper part 6a and lower part 6b of the guide wall 6 at the mouth position are located at a position near the streamline a where the flow velocity is relatively high. The streamlines c collide and flow in the weft insertion direction.

Therefore, the leakage fluid region G above and below the guide piece 4 in the streamlines c to d is extremely reduced, and a large amount of airflow flows in the weft insertion direction, making it possible to increase the weft insertion speed. Furthermore, in the apparatus of the present invention, the inner part 6c of the guide wall 6 is formed to extend straight in the weft insertion direction, so as shown in FIG.
Similar to the conventional example shown in FIG. 4, a leakage fluid castle A occurs behind the guide piece 4.

Even if leakage fluid occurs in this way, there is auxiliary fluid heading in the striping direction at the position of the streamline e on the entrance side of the guide piece 4, so the fluid in the guide section as a whole moves in the harvesting direction. A phenomenon of flowing occurs. Further, the auxiliary fluid injected from the injection port 7 of the auxiliary nozzle 5 is reflected in the twilling direction at the inner part c forming the straight wall surface, and an annular flow in the circumferential direction of the guide wall that disturbs the fluid flow in the weft direction is generated. It will never occur. Therefore, the striped yarn is not pushed toward the closed part, but rather is maintained at the inner part 6c of the guide wall 6 and stably inserted completely. The present invention can also be applied to a guide piece 4 in which the guide part is not half-open, but is formed into a substantially rectangular ring shape by the closing part 21, as shown in FIG.

In this guide piece 4, as shown in FIG. 17, the vertical portion 6d inside the closing chengdu 21 has an oblique shape converging toward the weft insertion side. Further, the present invention can also be applied to a so-called deformed type weft insertion device in which a part of the warp is deformed to form a recess that closes on the fabric front side.

As described in detail above, the present invention has a plurality of guide pieces that guide fluid and striped yarn arranged in parallel in the weft insertion direction on the sley, and a plurality of guide pieces that open toward the guide portion formed on the same guide piece. In the jet loom in which auxiliary nozzles are installed between the guide pieces at predetermined intervals, the inner part of the guide wall of each guide piece facing the injection port of the auxiliary nozzle is formed with a straight wall surface and By forming it flat so that it extends straight in the direction of striping, and forming the other parts in an oblique shape converging toward the direction of striping, we aim to increase the speed of striping while maintaining high stability of striping. This is an excellent invention for industrial use as a weft inserting device in a jet loom that has the following effects.

[Brief Description of the Drawings] Figure 1 is a side view of a guide piece used in a conventional striping device, and Figures 2 and 3 are cross-sectional views taken along XI-x1 and Z1-ZI in Figure 1, respectively. 4 is an explanatory view showing the state of fluid generation in the guide piece of FIG. 1, FIG. 5 is a side view showing another guide piece that is an improvement on the guide piece of FIG. 1, and FIG.
7 and 7 are respectively a ×2-×2 sectional view and a Z2-Z2 sectional view of FIG. 5, FIG. 8 is an explanatory diagram showing the state of fluid generation in the guide piece of FIG. 5, and FIG. FIG. 10 is a schematic side view of a loom embodying the invention; FIG. 11 is a side view of a guide piece embodying the invention; FIG.
Figures 13 and 13 are the X3-1x3 sectional view and Z3-Z3 sectional view of Figure 11, respectively, and Figures 14 and 15 are the
FIG. 16 is a side view showing another example of the guide piece of the present invention; FIG.
The figure is its X4-x4 sectional view. 1... Slay, 4... Guide piece, 5... Auxiliary nozzle,
6... Guide wall, 6a... Upper part, 6b... Lower part,
6c... Deep part, 6d... Vertical part, 7... Fluid injection port. Figure 2 Figure 3 Figure 6 Figure 7 Figure 1 Figure 4 Figure 5 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 16 Figure 17 Figure 14 Figure 15 figure

Claims (1)

[Claims] 1. A large number of guide pieces for guiding fluid and weft threads are arranged in parallel in the weft insertion direction on the slay, and a plurality of auxiliary nozzles are opened toward the guide portions formed on the guide pieces. are arranged between the guide pieces at a predetermined interval, the inner part of the guide wall of each guide piece facing the injection port of the auxiliary nozzle is formed to have a straight wall surface, and is straight in the weft insertion direction. 1. A weft insertion device characterized in that the weft insertion device is formed in a planar shape so as to extend in the weft insertion direction, and the other portion is formed in an oblique shape converging toward the weft insertion direction. 2. In claim 1, at least the guide portion of each guide piece corresponding to the auxiliary nozzle is formed in a half-open shape, and the inner part of the guide wall is formed so as to extend in the weft insertion direction, A weft insertion device characterized in that the upper and lower parts are formed in an oblique shape that converges toward the weft insertion side. 3 In claim 1, the guide portion of each guide piece is formed in a substantially square ring shape, the inner part of the guide wall is formed to extend in the weft insertion direction, and the upper, lower and vertical parts are formed in the weft insertion direction. A weft insertion device characterized by being formed in an oblique shape that converges toward the insertion side.