JPH0444635Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention is a multicolor air injection loom, especially an air injection loom that selectively inserts three or more weft yarns using three or more nozzles. Regarding the nozzle arrangement structure.

<Prior art> Conventionally, as shown in FIGS. 7 and 8, multicolor air injection looms employ a special reed type, that is, the reed feathers 2 of the reed 1 have a top-bottom relationship on the weaving front 3 side. By forming the convex parts 4 and 5 and the concave part 6 between them, a guide groove 7 is formed by the row of concave parts 6 on the front surface of the reed 1. A predetermined one is selected from among the nozzles 8A to 8D provided for each of the weft yarns A to D, and air is injected from the selected nozzle to inject the weft yarn into the guide groove 7, and the ejected weft yarn is guided. It is known that weft insertion is carried out by blowing air one after another by jetting air from a plurality of auxiliary nozzles 9A to 9N arranged at predetermined intervals along the groove 7.

In this case, as shown in FIG. 8, four nozzles 8A to 8D are arranged so that they face the guide groove 7 almost equally when viewed from the side on the opposite side of weft insertion. be.

In addition, 10 is a reed holder, 11 is a weft end supplementary yarn, 1
2 is a weft detector, and 13 is a woven fabric.

<Problem that the invention attempts to solve> However, as shown above, the four nozzles 8A~
When using 8D, there is a limit to reducing the size of each nozzle due to the weft traction force, and the size of the recess 6 forming the guide groove 7 is small from the viewpoint of making the weft fly stably. For better results, if the end surfaces of all the nozzles 8A to 8D are arranged in the guide groove 7 so that they are evenly opposed to each other as shown in FIG. It overlaps with part 4 or 5. Then, since the weft yarns fly almost in a straight line from each of the nozzles 8A to 8D, there is a problem in that the weft yarns may occasionally get caught on the convex portions 4 or 5, resulting in a weft insertion error.

In view of these conventional problems, the present invention is a multi-color air injection loom that can suitably insert wefts without causing weft insertion errors even when three or more nozzles are used in a special reed system. The purpose is to provide a nozzle arrangement structure.

<Means for solving the problem> For this reason, the present invention has a back wall formed on the reed feather,
An upper wall that is almost perpendicular to this back wall and a lower wall that is at an obtuse angle to this back wall are used to form a multi-layered structure with guide grooves formed on the front surface of the reed. In color air jet looms, 3
More than one nozzle is arranged side by side in the vertical and front-back directions of the loom, one nozzle on the reed side faces the guide groove, and its axis is parallel to the reed. The other nozzles located in the direction are located below this nozzle, and their axes are directed toward the upper wall side, and the other nozzles located in the front and back direction with respect to the one nozzle are located on the weaving side with respect to this nozzle. The axes of the other nozzles are arranged to intersect at one point with the axes of the one nozzle.

<Function> In the above configuration, since one nozzle faces the guide groove in a straight line, the weft yarn ejected from this nozzle does not jump out from the guide groove. Weft threads from other nozzles do not fly out of the guide groove due to the small amount of reflected flow on the inner surface of the guide groove and the flight inertia of the weft threads. Furthermore, since the size of the guide groove can be limited to a size that allows one nozzle to face each other, the weft can be stably run. In addition, since the bottom wall forms an obtuse angle with the back wall, when the jet flow from the nozzle is reflected on the bottom wall, it is reflected to the open side opposite to the back wall, and the weft threads ride the airflow and fly out from the open part. Although it is easy to do so, since the jet stream from the nozzle is directed to the back wall and the upper wall without being directed to the lower wall where it is likely to fly out, it is possible to insert the weft without causing the weft to fly out.

<Example> An example of the present invention will be described below based on FIGS. 1 to 6. However, in the drawings, the same elements as in the conventional example are given the same reference numerals.

FIG. 4 shows an outline of a multicolor air jet loom, in which four weft yarns A to D are pulled out from respective yarn feeders (not shown) and are connected to respective weft length measurement and storage devices 20A to 20D. is stored in each device 2.
The nozzles 0A to 20D are connected to the respective nozzles 8A to 8D.

The weft length measuring and storage devices 20A to 20D have the same structure, and as a representative example of the weft length storage device 20A, a drum 21 held in a stationary state will be explained with reference to FIGS. 5 and 6.
, a wrapping arm 22 that rotates around the wrapping arm 22 to wrap the weft yarn A, and a ballooning cover 23 that covers the outer periphery of the drum 21. And drum 21
The weft yarn A that is wound around and stored is pulled out from a guide 26 attached to the center of a disc-shaped buttful plate 25 fixed to a stay 24 installed upright in the frame of the loom, and then pulled to a nozzle 8A. It is made to pass. The full plate 25 has a nozzle hole 27 opened toward the inner surface of the central portion of the drum 21, and the nozzle hole 27 is constantly or intermittently supplied with pressurized air guided by a pipe 28 from a pressure air supply source. It is designed to supply the necessary amount. Therefore, air is injected from the nozzle hole 27, and the jet flow hits the inside of the drum 21, bounces off, and flows as shown by the arrow in the figure, so that it reaches the inner peripheral surface of the drum 21 and the ballooning cover 23. Prevents the adhesion of fluff.

The nozzles 8A to 8D are arranged as shown in FIGS. 1 to 3.

That is, the four nozzles 8A to 8D are arranged in parallel, two each in the vertical direction and the front-back direction of the loom, with their tips close to each other.

Of these, the nozzle 8A, which is the most frequently used nozzle on the upper and reed side (rear side), is straight in the weft insertion direction,
The end face of the guide groove 7 faces the guide groove 7 .

The upper nozzle 8B on the weaving side (front side) has its tip bent toward the reed, and its axis _lB is aligned with the guide groove 7.
intersects the axis _lA of the nozzle 8A at one point P at the end of
Further, it is oriented toward the bottom surface of the guide groove 7 (the inner wall of the recess 6).

The lower and reed side nozzle 8C has its tip bent upward, and its axis L _C is aligned with the end of the guide groove 7.
It intersects the axis _lA of the nozzle 8A at a point P, and further points toward the upper side surface of the guide groove 7 (the upper wall of the recess 6).

The nozzle 8D on the lower side and the front side has its tip bent upward and on the reed side, and its axis l _D is aligned with the guide groove 7.
intersects the axis _lA of the nozzle 8A at one point P at the end of
Furthermore, the guide groove 7 is oriented toward the corner between the bottom surface and the upper side surface.

Next, the action will be explained.

When inserting the weft from the nozzle 8A, the weft yarn A is ejected straight into the guide groove 7 on the air jet from the nozzle 8A. Therefore, the weft yarn A flies along the guide groove 7 due to the airflow, and the weft yarn A flies through the auxiliary nozzle 9.
It is caught by the airflow from A to 9N (see FIG. 7) and is transported while its flying position is controlled.

When the weft is inserted from the nozzle 8B, the weft B is obliquely ejected into the guide groove 7 on the air jet from the nozzle 8B. At this time, the airflow hits the bottom surface of the guide groove 7, but since this bottom surface is formed by the reed blades 2 being arranged side by side with gaps, a certain portion of the air flows backward from between the reed blades 2. run away. Therefore, since there are not so many rebound flows, even if the weft yarn B is conveyed by this rebound flow, the forward advancing force of the weft yarn B is large, so it hardly bounces back to the fabric side, and it is immediately transferred to the auxiliary nozzle 9A. ~9
Since the weft yarn B is caught and controlled by the air flow from the guide groove 7, the weft yarn B does not fly out from the guide groove 7.

When inserting the weft from the nozzle 8C, the weft C is obliquely ejected into the guide groove 7 on the air jet from the nozzle 8C. At this time, the airflow hits the upper side surface of the guide groove 7, but since this side surface is also a part where the reed blades 2 are arranged side by side, a certain portion of the air escapes upward from between the reed blades 2. Furthermore, since the air flow travels within a plane that includes the axis of the guide groove 7 orthogonal to the upper side surface of the guide groove 7, the rebound flow also falls within the same plane. Therefore, since there are not so many rebound flows, the advancing force of the weft C in the weft insertion direction is large even if the weft C is carried by this rebound flow, and the rebound flow is also on the same plane, the weft C is It flies in the guide groove 7 and is immediately caught and controlled by the air flow from the auxiliary nozzles 9A to 9N, so the guide groove 7
The weft C does not come out from the weft.

When the weft is inserted from the nozzle 8D, the weft D is obliquely ejected into the guide groove 7 on the air jet from the nozzle 8D. At this time, the air flow hits the bottom surface and the upper side surface of the guide groove 7, but since these are also the portions where the reed feathers 2 are arranged side by side as described above, a certain portion of the air escapes. In addition, since the rebound flow from them becomes concentrated at the corner between them, it stagnates at that corner. Therefore, the weft yarn D starts to fly through this stagnation part, and then flies inside the guide groove 7, and is immediately caught and controlled by the airflow from the auxiliary nozzles 9A to 9N, so that the weft yarn D starts to fly through this stagnation part, and then flies inside the guide groove 7, and is immediately caught and controlled by the air flow from the auxiliary nozzles 9A to 9N. The weft yarn D from 7 will not fly out.

<Effects of the invention> As explained above, according to the nozzle arrangement structure of the present invention, only one nozzle can be placed directly opposite the guide groove.
This is a real nozzle, but since the other nozzles in the vertical and front-back directions intersect at one point with the axis of this one nozzle, weft threads from other nozzles can also be inserted incorrectly. It can fly through the guide groove without any problems. Then, the size of the guide groove can be limited to the necessary size. Furthermore, since the jet stream from the nozzle is directed toward the back wall and the upper wall instead of toward the lower wall where it is likely to fly out, it is possible to insert the weft without causing the weft to fly out.

[Brief explanation of the drawing]

Fig. 1 is a view of the nozzle arrangement structure according to an embodiment of the present invention as seen from the opposite weft insertion side, Fig. 2 is a view of the same nozzle arrangement structure as seen from the weaving side, and Fig. 3 is a view of the same nozzle arrangement structure as seen from the weaving side. A view from above, Fig. 4 is a schematic diagram of a multicolor air injection loom, Fig. 5 is a schematic diagram of a weft length measuring and storage device, Fig. 6 is a side view of Fig. 5, and Fig. 7 is a conventional example. FIG. 8 is a side view of the conventional example shown in FIG. 1... Reed, 7... Guide groove, 8A to 8D... Nozzle.

Claims (1)

[Claims for Utility Model Registration] A back wall in which three or more nozzles 8A to 8D are used to selectively weft yarns A to D from those nozzles and formed into reed feathers, and a top wall that is substantially perpendicular to the back wall. wall and
Multicolored air is injected into the guide groove 7 formed on the front surface of the reed 1 to perform weft insertion by arranging concave portions that expand toward the front side of the fabric by forming a lower wall that forms an obtuse angle with respect to the back wall. In the injection type loom, the nozzles 8A to 8D are arranged side by side in the vertical and front-back directions of the loom, one nozzle 8A on the reed side is opposed to the guide groove 7, and its axis is arranged parallel to the reed 1, The other nozzles 8C and 8D, which are located vertically with respect to the one nozzle 8A, are located below this nozzle 8A, and their axes are directed toward the upper wall side, and are arranged in front and rear directions with respect to the one nozzle 8A. The other nozzles 8B and 8D located in the direction are located on the fabric front side with respect to this nozzle 8A, and their axes are directed toward the back wall. A nozzle arrangement structure for a multicolor air injection loom characterized by intersecting the axis at one point.