JPH07279002A - Picking device of air jet loom - Google Patents

Abstract

PURPOSE:To provide a device capable of largely reducing the generation of fuzz and yarn breakage at the auxiliary nozzles of the picking device of an air jet loom. CONSTITUTION:In an air jet loom picking device in which a weft 9 jetted from a main nozzle is picked by arranging the depressed parts 5 of deformed dents 4 having the depressed parts in the picking direction and subsequently jetting air from auxiliary nozzles 7 arranged in the picking direction at a prescribed internal into the formed groove-like weft-guiding passageway 6, the deformed dents at positions faced to the auxiliary nozzles 7 are exchanged with flat dents 10. Thereby, the contact force of the weft with the projected parts of the deformed dents is largely weakened, and the generation of fuzz and yarn breakage are drastically reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft inserting device for an air jet room (air jet type shuttleless loom), and more particularly to a modified reed type weft inserting device having a weft guide passage.

[0002]

2. Description of the Related Art FIG. 3 is a schematic perspective view of a modified reed of a typical conventional weft insertion device for an air jet room. Reed 3 used in conventional weft insertion device for air jet loom
In the first example, the concave portion 3 is provided between the upper reed frame 32 and the lower reed frame 33.
The deformed reed blades 34 having the number 5 were closely aligned and fixed. Then, the concave portion 35 is linearly connected from one end to the other end to form a weft guide passage 36, and the weft yarn 39 ejected from a main nozzle (not shown) is passed through the guide passage 36. Further, in order to surely and smoothly pass the weft 39 through the weft guide passage 36, auxiliary nozzles 37 having injection holes are provided in the vicinity of the guide passage 36 at predetermined intervals in the weft inserting direction, and the auxiliary nozzles 37 are provided along the reed in the weft inserting direction. The air was jetted accordingly. The auxiliary nozzle 37 is
For example, a groove is formed in a reed holder (not shown) that holds the lower reed frame 33, and the reed holder is set in the mounting member 38 that utilizes this groove.

[0003]

The loom using the conventional weft inserting device has a problem that sometimes fluff occurs or yarn breakage occurs. FIG. 4 illustrates the operation of the reed of the conventional air jet loom, and FIG. 5 illustrates a cross-sectional view of the reed showing the bending state of the warp (bottom thread) between the modified reed wing of the conventional reed and the auxiliary nozzle. The reed 31 oscillates between a position P shown by a one-dot chain line and a position Q shown by a solid line, the weft is inserted at the position Q, and the reed is beaten at the position P. In addition, 41 is a warp upper thread, 42 is a warp lower thread, and 43 is a cloth. by the way,
Usually, the density of the warp threads is arranged in 3 to 15 threads / 2 mm,
Since the thickness of the auxiliary nozzle 37 is about 2 mm, the auxiliary nozzle 37 pushes the warp yarns by swinging the deformed reed blades 34. That is, when the reed 31 moves from the position P to the position Q, the lower protrusion 40 that forms the concave portion 35 of the deformed reed wing 34 intersects with the lower thread 42. One of the causes of fluff and yarn breakage is that when the deformed reed wing 34 moves from position P to R and the warp yarn opens vertically, the tip of the auxiliary nozzle 37 interrupts between the lower yarns 42. The lower thread 42 is shown in FIG.
As shown in FIG. 5, it was found that this is because the lower projection 40 forming the recess 35 of the deformed reed wing 34 and the auxiliary nozzle 37 are bent and strongly contact the projection 40. The present invention has been completed with the object of solving the problems of the prior art and providing a weft inserting device with less fluffing and yarn breakage in the auxiliary nozzle portion.

[0004]

In order to achieve the above object, the present invention forms a groove-shaped weft guide passage 6 by connecting the recesses 5 of the deformed reed blade 4 having the recesses 5 in the weft inserting direction, and guiding the groove. In the weft inserting device of the air jet loom for weft inserting the weft 9 ejected from the main nozzle by injecting air from the auxiliary nozzle 7 arranged at a predetermined interval in the weft inserting direction toward the passage 6, the auxiliary nozzle 7 Provided is a weft inserting device for an air jet loom, characterized in that a deformed reed wing located at a position opposite to is formed by a flat reed wing 10. In the present invention, it is preferable that the portion formed by the flat reed blades 10 be 1 to 5 times the width of the auxiliary nozzle 7 in the weft insertion direction.

[0005]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment example of the reed of the present invention in a weft inserting device for an air jet room. This device comprises a reed 1, an auxiliary nozzle 7, and a main nozzle (not shown) for weft injection. The reed 1 includes a deformed reed blade 4 that forms a weft guide passage 6 by connecting a recess 5 between an upper reed frame 2 and a lower reed frame 3, and a recessed portion of the deformed reed 4 at a position facing the auxiliary nozzle 7. 5, the flat reed blades 10 from which the protrusions 11 on both sides are removed are fixed. The lower reed frame 3
A plurality of auxiliary nozzles 7 arranged at a predetermined interval in the weft insertion direction are attached to the reed holder holding the above through a stand 8. The reed 1 and the auxiliary nozzle are swung by a swinging device (not shown). The shape of the flat reed blade 10 is usually
It is formed without providing a concave portion or a convex portion projecting from the weft yarn 9 on the side facing the weft yarn 9, but the edge is not limited to a straight line. For example, when the auxiliary nozzle 7 is attached below the recess 5, the flat reed blade 10 has the recess 5
Of the bilateral protrusions, only the lower protrusions may be removed, and the reeds of this shape are also included in the flat reeds of the present invention. FIG. 2 is a cross-sectional view showing the bending state of the warp yarn (bottom yarn 12) between the flat reed blade 10 and the auxiliary nozzle 7 when the weft inserting device of FIG. 1 is used.
This corresponds to the position R in FIG. The bending amount of the lower thread 12 in FIG.
As is clear from comparison with FIG.
It can be seen that the contact between No. 2 and the flat reed feather 10 is weakened.
For this reason, the contact force between the warp and the reed is significantly weakened, and fluff and yarn breakage are reduced.

The width B of the flat reed blade 10 shown in FIG. 2 is preferably 1 to 5 times the width A of the auxiliary nozzle 7. If it is smaller than 1 times, of course, almost no effect is obtained, and if it is larger than 5 times, air is dispersed and the carrying force of the weft may be lowered, which is not preferable.

[0007]

EXAMPLE An air jet loom was modified by using the weft inserting device of the present invention of the same type as shown in FIG. 1, and the number of times the loom was stopped due to the unremodeled air jet loom and the warp (the number of times of the cause stop). ) Was compared. The air jet loom used had 22 auxiliary nozzles attached at intervals of 80 mm. The width of the deformed reed wing facing the auxiliary nozzle is 6
Replaced with flat reed feather over mm. Using these air jet loom, weaving was performed under the following weaving conditions.

B) Woven fabric: warp, polyester, weft, T100 30/2, T65C, 34/2, warp density, 97 pcs / in, weft density, 100 pcs / in, weave, 2/1 ayalo) Loom: Nissan LA40, 190 cm width, c) Through width 162 cm D) Loom speed: 600 rpm The average number of times of cause stop per 24 hours in the weft insertion auxiliary nozzle was measured under the above conditions, and the result was that the conventional device: 5.0 times / day. Table Device of the present invention: 0.2 times / day / table.

[0009]

According to the present invention, the grooved weft guide passages are formed by connecting the concave portions of the modified reed wing having the concave portions in the weft inserting direction, and the auxiliary elements are arranged at predetermined intervals in the weft inserting direction toward the passages. In the weft insertion device of the air jet loom, in which the weft inserted from the main nozzle is inserted by injecting air from the nozzle, the deformed reed wing at the position facing the auxiliary nozzle is changed to a flat reed wing. Therefore, when swinging the reed and opening the upper thread and the lower thread of the warp, the contact force between the warp and the reed wing is significantly weakened, and fluff and thread breakage are greatly reduced. I was able to.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment example of a reed of the present invention in a weft inserting device for an air jet room.

FIG. 2 is a cross-sectional view of the reed of the present invention showing the bending state of the warp (bottom thread) between the flat reed and the auxiliary nozzle.

FIG. 3 is a perspective view of a conventional reed.

FIG. 4 is a side view showing the operation of a conventional reed in an air jet loom.

FIG. 5 is a cross-sectional view of a conventional reed showing how the warp (bottom thread) between the modified reed wing and the auxiliary nozzle is bent.

[Explanation of symbols]

1: Reed 2: Upper reed frame 3: Lower reed frame 4: Deformed reed wing 5: Recessed part 6: Weft guide passage 7: Auxiliary nozzle 8: Stand
9: Weft 10: Flat Reed 11: Projection 12: Warp Lower Thread
13: Fabric 31: Reed 32: Upper Reed Frame 33: Lower Reed Frame 3
4: Deformed reed 35: Recess 36: Weft guide passage 37: Auxiliary nozzle 38: Stand 39: Weft 40: Projection 41: Upper thread of warp
42: warp lower thread 43: cloth

Claims (2)

[Claims] 1. A grooved weft guide passage 6 is formed by connecting the recesses 5 of a modified reed wing 4 having a recess 5 in the weft inserting direction, and the groove-like weft guide passages 6 are arranged at predetermined intervals in the weft inserting direction toward the guide passage 6. In a weft inserting device of an air jet loom in which the weft 9 injected from the main nozzle is wefted by injecting air from the auxiliary nozzle 7, the deformed reed wing at a position facing the auxiliary nozzle 7 is replaced by the flat reed wing 10. An air jet loom weft insertion device characterized by being configured. 2. The weft of an air jet loom according to claim 1, wherein the range constituted by the flat reed blades 10 is 1 to 5 times the width of the auxiliary nozzle 7 in the weft insertion direction. Putting device.