JPH0586544A - Picking device of jet loom, reed for picking device and production of the reed - Google Patents

Abstract

PURPOSE:To provide the subject picking device designed to prevent flying troubles while achieving higher weft flying speed. CONSTITUTION:The respectively back wall surfaces 4b, 5b of guide holes 4, 5 recessly provided to the front of the respective dents 3A, 3B of a deformed reed 2 are provided with such slopes as to enter the picking passage side S toward the picking direction. The tilt angle thetab1 of the back wall surface 4b of the dent 3A facing to the first subnozzle group 7 close to the main nozzle 6 is set so as to be smaller than the tilt angle thetab2 at the back wall surface 5b of the dent 3B facing to the second, third... subnozzle groups.

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 in a jet loom using a modified reed having a guide hole for weft flying on the front surface of a reed wing, a reed for the weft inserting device, and a reed manufacturing method. Regarding the method.

[0002]

2. Description of the Related Art In order to increase the flight speed of a weft thread that travels in a weft insertion passage formed by a row of guide holes of a modified reed, Japanese Patent Publication No. 59-26688 and Japanese Patent Laid-Open Publication No. 1-36.
In the weft inserting device of Japanese Patent No. 14753, the upper wall surface, the lower wall surface and the inner wall surface forming the open type guide hole are each provided with an inclination so as to enter the weft inserting passage side in the weft inserting direction.

In the weft inserting device disclosed in Japanese Patent Publication No. 59-26688, the flow velocity of the air in the weft inserting passage is increased by increasing the inclination angle of each wall surface forming the guide hole to increase the flight speed of the weft. I am raising. An increase in the inclination angle of the back wall leads to an increase in air leakage from the guide hole opening side, which causes flying problems such as the weft tip jumping out of the weft insertion passage, but this configuration improves the flying speed. Planned.

In the weft inserting device disclosed in Japanese Patent Laid-Open No. 1-314553, the inclination angle of the upper wall surface is set to be larger than the inclination angle of the rear wall surface, and the air from the auxiliary nozzle for weft insertion is supplied to the upper wall surface and the inner surface of the guide hole. It is jetting toward the wall. Setting the inclination angles of the upper wall surface and the inner wall surface in this device has the effect of suppressing air leakage from the opening side of the guide hole.

[0005]

However, in any of the weft insertion devices disclosed in the above publications, the inclination angle of the wall surface of the guide hole is set uniformly from the weft insertion start end to the weft insertion end. Such inclination angle setting cannot be an effective means for preventing the weft from jumping out and at the same time achieving an improvement in the flying speed.

The air flow rate on the upstream side of the weft insertion passage is the total flow rate of the air jetted from the weft insertion main nozzle and the air jetted from the weft insertion auxiliary nozzle, and therefore the air jet flow from the weft insertion main nozzle. Is almost double the air flow rate on the downstream side, which is less affected by. Due to such a flow rate ratio, the amount of air leakage from the opening side of the guide hole on the upstream side of the weft insertion passage is larger than that on the downstream side.

Therefore, if the inclination angles of the inner wall surfaces of all the guide holes are set to be small in consideration of the air leakage on the upstream side, the weft can be prevented from jumping out, but the flying speed can be increased. Can not. On the contrary, if the inclination angle of the inner wall surface is set to a large value in accordance with the degree of air leakage on the downstream side, the flying speed can be increased, but the weft jumping-out preventing effect is deteriorated. It is difficult to prevent both the weft from jumping out and to increase the flying speed even by setting different inclination angles on the inner wall surface and the upper wall surface.

An object of the present invention is to provide a jet loom using a modified reed having an open type guide hole, which is capable of effectively preventing flying problems while increasing the flight speed of the weft. It is to provide an insertion device. Another object of the present invention is to provide a reed for such a weft inserting device and a method for manufacturing the reed.

[0009]

In order to solve the above-mentioned problems, the first invention is to enter the weft insertion passage side into the wall surface of each guide hole formed in the front surface of the reed wing as it goes in the weft insertion direction. While setting the inclination, the inclination angle of the guide hole wall surface of the reed blade arranged in the section closer to the main nozzle of the reed blade row is set from the inclination angle of the guide hole wall surface of the reed blade arranged in the section closer to the side opposite to the main nozzle. A weft inserting device was constructed by setting the value smaller.

According to a second aspect of the present invention, the wall portion forming the guide hole of the reed wing is provided with an inclined surface which enters the weft insertion passage side as it goes in the weft insertion direction, and a predetermined length from the weft insertion start end side of the weft insertion passage. A reed for a weft inserting device is configured by providing a second inclined surface that is inclined to the side opposite to the weft inserting passage as it goes in the weft inserting direction, in the wall portion of the guide hole of the reed arranged in the section extending over ..

In the method for manufacturing a reed according to the second aspect of the invention, the guide hole wall portions of the plurality of reed blades arranged with the guide holes are ground in the direction from the weft insertion start end to the end of the weft insertion passage. By performing, the forward direction polishing step of forming an inclined surface that enters the weft insertion passage side as it goes in the weft insertion direction, and among the plurality of reed blades arranged with the guide holes,
Welding is performed by polishing each guide hole wall portion of the reed wing arranged in a section extending from the weft insertion start end side of the weft insertion passage to a predetermined length in the direction from the weft insertion end to the start end of the weft insertion passage. And a reverse polishing step of forming a second inclined surface that is inclined toward the opposite side of the weft insertion passage as it goes in the direction.

[0012]

According to the first aspect of the invention, different inclination angles of the respective wall surfaces in the main nozzle near section (upstream side) and the anti-main nozzle near section (downstream side) affect the jet flow of the weft inserting main nozzle. It corresponds to some extent. On the upstream side where the jet flow of the weft inserting main nozzle has a large effect, a small angle of inclination reduces air flow reflection from the wall surface and increases leakage from the reed blades. Air leakage to the opening side of the guide hole is suppressed, and flying troubles are prevented. If the inclination angle of the wall surface is increased, the air flow reflection from the wall surface is increased, the leakage from the reeds is reduced, and the flight speed is increased.

On the downstream side, which is less affected by the jet flow of the weft inserting main nozzle, air leakage from the guide hole opening is less likely to occur than on the upstream side, and this small air leakage is due to the increase in the inclination angle of the wall surface. Compensate for reflection leakage. Therefore, a high flight speed is achieved on the downstream side, and the difficulty in increasing the flight speed on the upstream side is compensated by the high flight speed on the downstream side.

According to the second aspect of the present invention, the second inclined surface, which is inclined toward the side opposite to the weft insertion passage as it goes in the weft insertion direction, increases air leakage from between the reed blades and guides the flying weft yarn into the guide hole. Creates a suction airflow that attracts the walls. This suction airflow weakens the action of the air reflection flow due to the inclined surface entering the weft insertion passage side as it goes in the weft insertion direction.

Therefore, in the section where the reed blade having the second inclined surface is arranged, the air flow reflection from the wall surface is reduced and the leakage between the reed blades is increased. That is, as in the first aspect of the invention, air leakage to the guide hole opening side is suppressed on the upstream side of the weft insertion passage to prevent flying problems, and the flying speed is increased on the downstream side.

According to the method for manufacturing a reed described above, the reed according to the second invention can be manufactured simply and reliably.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment embodying the present invention will be described below with reference to FIG.
5 to 5, the second embodiment will be described with reference to FIG. 6, and the third embodiment will be described with reference to FIGS.

[First Embodiment] As shown in FIGS.
A deformed reed 2 is fixed on a sley 1 that swings according to the operating conditions of the jet loom. The deformed reed 2 is composed of a pair of upper and lower stays 8A, 8B and a plurality of reed blades 3A, 3B. That is, both stays 8A, 8B
A plurality of reed blades 3A arranged at equal intervals along the width direction of the
3B are connected to each other at their upper and lower ends.

Guide holes 4 and 5 are formed on the front surfaces of the respective reed blades 3A and 3B, and a weft insertion passage S is formed by the arrangement of the guide holes 4 and 5. Each of the guide holes 4 and 5 has substantially horizontal upper wall surfaces 4a and 5a, substantially vertical inner wall surfaces 4b and 5b, and lower wall surfaces 4c and 5c slightly inclined with respect to the upper wall surfaces 4a and 5a. The wall surface is formed into a substantially rectangular recess shape. Further, the back wall surfaces 4b, 5b of the guide holes 4, 5 are provided with an inclination with respect to the weft inserting axis.

As shown in FIGS. 1 and 3, a main nozzle 6 for weft insertion is arranged on one end side of the sley 1, and a plurality of sub-nozzles 7 are arranged on the front surface of the sley 1 at equal intervals. A plurality of sub-nozzles 7 (four in this embodiment) form a group. Then, the sub nozzle group includes the main nozzle 6
The first sub-nozzle group 11 closest to the first sub-nozzle group, the second sub-nozzle group 12 to the next sub-nozzle group 13 are provided.

Each sub nozzle 7 constituting each sub nozzle group
Are simultaneously ejected, and each sub-nozzle group includes a first sub-nozzle group 11
To the final sub-nozzle group 13 are sequentially relay-injected.
Further, the first sub nozzle group 11 ejects simultaneously with the main nozzle 6. Each sub-nozzle group injects air at a flow rate substantially the same as that of the main nozzle 6 to assist the weft yarn in the weft insertion passage S.

As shown in FIG. 3, a plurality of reed blades 3A, 3B
The length of the weft insertion passage S formed by means of the above corresponds to the interval R between the two reed blades respectively arranged at the left and right ends of the deformed reed 2. The weft insertion passage S is provided with the first sub-nozzle group 11
And a boundary between the second sub-nozzle group 12 and the second sub-nozzle group 12 divides the front section L1 and the rear section L2. As shown in FIG. 2, the inclination angle θ _b1 of the inner wall surface 4b of the reed blade 3A arranged in the front section L1 with respect to the weft insertion axis is the reed blade 3B arranged in the rear section L2.
_Is set to be smaller than the inclination angle θ _b2 of the inner wall surface 5 a (θ _b1 <θ _b2 ).

A part of the air flowing in the weft inserting passage S leaks to the rear side of the deformed reed 2 from between the inner wall surfaces 4b and 5b, while the inner wall surfaces 4b and 5b cause the guide holes 4 and 5 to flow. It is reflected to the opening side (the front side of the deformed reed 2). Guide hole 4,
The air flow directed to the opening side of 5 acts to improve the flight speed of the weft yarn, but also has the action of causing the weft yarn to fly out of the weft insertion passage S. In contrast,
The air flow leaking to the rear side of the deformed reed 2 causes an action of trying to attract the weft into the weft insertion passage S.

Each back wall surface 4 of the reed wing 3A and the reed wing 3B
The different inclination angle settings of b and 5b correspond to the influence of the air blown from the main nozzles 6 in the front section L1 and the rear section L2. That is, in the front section L1 where the influence of the jet flow from the main nozzle 6 is large, the air flow reflection from the back wall surface 4b is reduced by reducing the inclination angle _θb1 of the back wall surface 4b, and the rear side of the deformed reed 2 is reduced. Leakage to As a result, air leakage to the opening side of the guide hole 4 is suppressed, and flying problems are prevented.

In the rear section L2, the inclination angle θ _{b2 of the} inner wall surface 5b is
By increasing, the air flow reflection from the back wall surface 5b increases, and the leakage to the rear side of the deformed reed 2 decreases. As a result, the flight speed of the weft is increased. In the rear section L2 where the influence of the jet flow from the main nozzle 6 is small, air leakage to the opening side of the guide hole 5 is less likely to occur than in the front section L1. This original small amount of air leakage to the opening side compensates for the amount of leakage due to air reflection due to the large inclination angle θ _b2 of the inner wall surface 5b. Therefore, the flying speed in the rear section L2 can be increased without causing flying problems.

The difficulty in increasing the flight speed in the front section L1 is compensated by the increase in the flight speed in the rear section L2. Therefore, according to this embodiment, it is possible to prevent the flying trouble while increasing the flying speed of the weft yarn throughout the weft insertion passage.

By the way, in Japanese Utility Model Publication No. 63-772, a plurality of guide elements each having an air guide hole and a weft escape gap are arranged in the weft insertion direction, and a guide passage is formed by a row of air guide holes. A device is disclosed. In this device, the inner peripheral surface of the air guide hole of the guide element located from the main nozzle side to the middle of the arrangement is formed parallel to the axis of the weft insertion passage, while the inner peripheral surface of the air guide hole of the remaining guide element is formed in the weft insertion direction. The taper shape is tapered toward the end. Since the guide of this device is a so-called closed type, the trouble that the weft jumps out of the guide passage due to the jet flow from the main nozzle cannot be essentially caused. Moreover, in this closed type guide, an increase in the inclination angle leads to a decrease in the flying speed, so that it is impossible to see the object, action and effect of the present invention.

The present invention is not limited to the first embodiment described above, and the main nozzle 6 may be arranged with a slight inclination with respect to the weft inserting axis. Further, the inner wall surface 4b of the reed blade 3A is parallel to the weft insertion axis (that is, the inclination angle θ _b1 = 0 °).
It may be set to.

As shown in FIG. 4, the present invention is applied to a weft inserting device having two main nozzles 21 and 22 which are inclined downward and upward at the same angle θ ₃ with respect to the weft inserting axis. Good. Such a weft inserting device is used when a plurality of weft yarns of different colors are used. The front section L1 is set corresponding to a region where the influence of the jet flows from both main nozzles 21 and 22 is large.

Further, as shown in FIG. 5, a multicolor weft in which a second main nozzle 23 is inclined at an angle θ ₄ on the front side of the main nozzle 6 arranged substantially on the same axis as the weft insertion axis. The present invention may be applied to the insertion device.

According to this structure, the second main nozzle 2
Despite the slanted arrangement of No. 3, since the inclination angle θ _b1 of the inner wall surface 4b of the deformed reed 2 is small, the air jetted from the second main nozzle 23 is reflected by the inner wall surface 4b of the reed blade 3A. Angle becomes smaller with respect to the weft insertion axis. Therefore, flying trouble of the weft yarn ejected from the second main nozzle 23 is also prevented. Also in this example, the previous section L
1 is set corresponding to the region where the influence of the jet flow from both main nozzles 6 and 23 is large.

[Second Embodiment] In the first embodiment, only the inner wall surfaces 4b and 5b of the guide holes 4 and 5 are inclined with respect to the weft inserting axis. In the second embodiment, each guide hole 4,
The upper wall surfaces 4a, 5a and the lower wall surfaces 4c, 5c of 5 are also inclined with respect to the weft inserting axis.

As shown in FIG. 6, the inclination angles θ _a1 and θ _C1 are respectively the upper wall surface 4a of the reed blade 3A arranged in the front section L1.
And the inclination angle of the lower wall surface 4c with respect to the weft insertion axis.
Similarly, the inclination angles θ _a2 and θ _C2 respectively indicate the inclination angles of the upper wall surface 5a and the lower wall surface 5c of the reed blades 3B arranged in the rear section L2 with respect to the weft inserting axis.

In the guide hole 4 in the front section L1, the inclination angle θ _a1 of the upper wall surface 4a is set to be larger than the inclination angle θ _b1 of the inner wall surface 4b and the inclination angle θ _C1 of the lower wall surface 4c. Further, the inclination angle θ _b1 of the inner wall surface 4 _b is the inclination angle θ _{C1 of the} lower wall surface 4 c.
Is set equal to or greater than. Rear section L
Inclination angles θ _a2 , θ _b2 , θ of each wall surface of the guide hole 5 of No. _2
C2 is set similarly. That is, the relations of the following equations (1) and (2) are established between the inclination angles of the wall surfaces in the guide holes.

Θ _C1 ≦ θ _b1 <θ _a1 (1) θ _C2 ≦ θ _b2 <θ _a2 (2) In each of the guide holes 4 and 5, the inclination angles θ _C1 and θ _C2 of the lower wall surfaces 4 c and 5 c are increased. The inclination angles θ _a1 and θ _{a2 of the} wall surfaces 4 a and 5 a are set to be smaller than the inclination angles θ _C1 and θ _C2 , and the reflection flow from the lower wall surfaces 4 c and 5 c causes the reflection flow from the upper wall surfaces 4 a and 5 a. This is because the leakage of the jet flow to the guide hole opening side increases. In such a case, not only the flying speed decreases, but also a weft flying problem easily occurs.

Further, as in the first embodiment, the front section L1
The respective inclination angles are set so that the inclination angle of the wall surface of is not larger than the inclination angle of the wall surface of the rear section L2. That is, the inclination angles of the respective wall surfaces corresponding to the front section L1 and the rear section L2 have the relationships of the following expressions (3) to (5).

Θ _a1 = θ _a2 (3) θ _b1 <θ _b2 (4) θ _C1 <θ _C2 (5) According to the present embodiment, the relationships shown in the equations (1) to (5) are satisfied. By thus setting the inclination angle of each wall surface, it is possible to more effectively improve the flying speed and prevent the flying trouble than the first embodiment.

[Third Embodiment] In this third embodiment, as shown in FIGS. 8 and 9, reed blades 9A arranged in the front section L1.
Guide holes 14 and 15 are formed in the reed blades 9B arranged in the rear section L2. The guide hole 15 in the rear section L2 includes the upper wall surface 15d (inclination angle θ _d2 ) and the inner wall surface 15e.
(Tilt angle θ _e2 ) and the lower wall surface 15 _f (tilt angle θ _f2 ). On the other hand, the guide hole 14 in the front section L1
Is the upper wall surface 14d (inclination angle θ _d1 ) and the first inner wall surface 14e
And a second back wall surface 14g, and a bottom wall including a first bottom wall surface 14f and a second bottom wall surface 14h.

The first inner wall surface 14e of the guide hole 14 and the first
The lower wall surface 14f has inclination angles θ _e1 and θ _f1 which enter the weft inserting passage S side as it goes in the weft inserting direction. On the other hand, the second inner wall surface 14g and second bottom wall surface 14h of the guide hole 14 has an inclination angle theta _g respectively inclined to the side opposite to the weft insertion path S toward the weft inserting direction, theta _h respectively.

Here, the inclination angles of the wall surfaces that are inclined in the respective guide holes are set so that the relationship shown in the following equation (6) is established. θ _f1 = θ _f2 = θ _e1 = θ _e2 <θ _d1 = θ _d2 (6) Further, the inclination angles θ _g and θ _h of the second inner wall surface 14 g and the second lower wall surface 14 _h are respectively the first inner wall surface 14 e and It is set to be larger than the inclination angles θ _e1 and θ _{f1 of} the first lower wall surface 14 f (θ _e1 <θ _g , θ _f1 <θ _h ).

In the front section L1 and the rear section L2, the back wall surfaces 14e and 15e and the lower wall surfaces 14f and 15f corresponding to each other are set to have the same inclination angle. Nevertheless, the back wall and the lower wall of the front section L1 have the second inclined second wall.
Since the inner wall surface 14g and the second lower wall surface 14h are provided, the reflected flow rate of air by the inner wall and the lower wall of the front section L1 is smaller than the reflected flow rate of the inner wall surface 15e and the lower wall surface 15f of the rear section L2. This is because the amount of the air drawn between the reed blades 9A increases due to the action of the second inner wall surface 14g and the second lower wall surface 14h that are inclined backwards.
This is for weakening the air reflecting action toward the weft insertion passage opening side by 4e and the first lower wall surface 14f.

Therefore, also with this configuration, similarly to the first and second embodiments, it is possible to prevent the flying trouble in the front section L1 and to increase the flying speed in the rear section L2.

The inclination angle of each wall surface may be set so that the relationship of the following expression (7) is established instead of the above expression (6). [theta] _f1 = [theta] _f2 <[theta] _e1 = [theta] _e2 <[theta] _d1 = [theta] _d2 (7) The front section L1 shown in the first to third embodiments corresponds to an area where the influence of the jet flow from the main nozzle is large. To do. Although this region changes depending on the injection pressure of the main nozzle, the length of the front section L1 is 50 to 5 in a general jet loom.
It is set in the range of 00 mm. In addition, the reed width (L1 + L2) of the jet loom is usually 1 m depending on the width of the woven fabric.
It is designed in the range of 3.5m.

[Manufacturing Method of Reed] The manufacturing method of the modified reed shown in the third embodiment will be described. Guide holes 14, 1
The reed blades 9A and 9B having No. 5 are manufactured by punching a metal plate having a thickness of 2 to 4 mm with a press machine. In this case, as shown in FIG. 10, each reed blade 9A, 9B
The wall surfaces forming the guide holes 14 and 15 are not actually surfaces perpendicular to the side surfaces 10 of the reed blades 9A and 9B due to the nature of punching. That is, each wall surface 14d, 14e,
14f, 15d, 15e, and 15f have an inclination to enter the center side of the guide hole from the beginning toward the punching direction. Since the influence of punching appears equally on each wall surface, the inclination angle of each wall surface immediately after punching is calculated by the following equation (8).
There is a relationship shown in.

Θ _f1 (= θ _f2 ) = θ _e1 (= θ _e2 ) = θ _d1 (= θ _d2 ) ... (8) With each reed blade 9A, 9B separated by a predetermined distance as shown in FIG. A modified reed is constructed by braiding using the upper and lower stays shown in FIG. After that, weft insertion passage S
Each of the wall surfaces of the guide holes 14 and 15 constituting the above is polished in two steps using a rotary polishing device.

The rotary polishing machine used is Japanese Patent Publication No. 61-
It is of the same type as the known polishing apparatus for a gold reed disclosed in Japanese Patent No. 32416. As shown in FIG. 12, the polishing device 2
Reference numeral 4 has a disc-shaped polishing buff 25 capable of rotating in the forward and reverse directions. During the polishing operation for the guide hole wall portion of the reed blade 9A (9B), the polishing device 24 is movably attached to the upper part of the reed along the reed width so that a part of the polishing buff 25 is in sliding contact with the guide hole wall portion. ..

In the first polishing step, the polishing buff 25 is polished in the forward direction (arrow 26) so that the polishing buff 25 polishes the guide hole wall portion from the start end side to the end side of the weft insertion path S.
Direction). Then, while rotating the polishing buff 25 in the forward direction, the polishing device 24 is advanced from the starting end side to the terminating end side of the weft insertion passage S to polish only the upper wall surfaces 14d, 15d of all the guide holes 14, 15. ..

By this normal rotation polishing, the upper wall surfaces 14d, 1
The inclination angles θ _d1 and θ _d2 of 5d were made larger than the inclination angle naturally formed by punching. The inclination angles of the upper wall surfaces 14d and 15d, the inner wall surfaces 14e and 15e, and the lower wall surfaces 14f and 15f shown in FIG. 7 are set to satisfy the relationship of the above expression (6).

In the second polishing step, the polishing buff 25 is polished in the opposite direction (arrow 26) so that the polishing buff 25 polishes the guide hole wall portion from the end side to the start side of the weft insertion passage S.
In the opposite direction). Then, while rotating the polishing buff 25 in the reverse direction, the polishing device 24 is retracted from the end side of the weft insertion path S toward the start side, and the inner wall of the guide hole 14 of each reed blade 9A arranged in the front section L1 and The lower wall was polished.

By this reverse rotation polishing, as shown in FIGS. 8 and 9, the first inner wall surface 14 is formed on the inner wall and lower wall of each reed blade 9A.
The second inner wall surface 14g and the second lower wall surface 14h which are respectively reversely inclined with respect to the e and the first lower wall surface 14f are formed.

When the deformed reed was attached to the weft inserting device of the jet loom by the normal rotation and the reverse rotation polishing, the measured air pressure of the air leaked to the weft insertion passage opening side was distributed as shown in FIG. So that 11
According to the above, the wind pressure value P ₁ in the front section L1 is set to P ₂ in most of the rear section L2 (P ₁ <P ₂ ). The transitional section ΔL in which the wind pressure value rises from P ₁ to P ₂ has a length that is about half that of the preceding section L1.

Generally, the guide hole of the reed wing produced by punching with a press machine has a wall surface having a constant inclination angle from the beginning. As described above, it is possible to impart a slightly different inclination angle to the wall surface which is already inclined in one direction by the polishing process in the front section L1 and the rear section L2 as shown in the first and second embodiments. It's not always easy.

On the other hand, in the method of the present embodiment, the front section L1 is in a state in which the inclination angle of the wall surface that is positively inclined in the front section L1 and the corresponding inclination angle of the wall surface that is positively inclined in the rear section L2 are equal. The second wall surface, which is reversely inclined with respect to the wall portion, is formed by polishing. Therefore, unlike the first and second embodiments, it is not necessary to set the tilt angle slightly different between the front section L1 and the rear section L2. Therefore, according to this method, the wall surfaces (14d to 14h, 15d to 14d to 14h to 15d to each guide hole 14 and 15 of the deformed reed having appropriate inclination angles are formed.
15f) can be formed easily and surely.

In the forward polishing step, the forwardly inclined inner wall surface and lower wall surface of each of the guide holes 14 and 15 may be polished. Further, the reverse rotation polishing may be performed first, and then the normal rotation polishing may be performed.

[0055]

As described in detail above, according to the present invention, in the weft inserting device, the inclination angle of the guide hole wall surface of the reed blade arranged in the section close to the main nozzle of the reed blade row is shifted to the side opposite to the main nozzle. Since it is set to be smaller than the inclination angle of the guide hole wall surface of the reed wing arranged in the section, or in the reed for the weft inserting device, the reed is arranged in the section extending over a predetermined length from the weft inserting start end side of the weft inserting passage. No. 2 inclined toward the side opposite to the weft insertion passage as it goes in the weft insertion direction to the wall of the wing guide hole
Since the inclined surface is provided, it has an excellent effect that the flying trouble can be prevented while increasing the flying speed of the weft as the entire weft insertion passage.

According to the reed manufacturing method including the forward polishing step and the reverse polishing step, the reed for the weft inserting device of the present invention can be easily and reliably manufactured.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a weft inserting device according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the reed taken along the line AA in FIG.

FIG. 3 is an overall front view of the weft inserting device of the first embodiment.

FIG. 4 is an overall front view of a weft inserting device which is another example of the present invention.

FIG. 5 is a plan sectional view of a weft inserting device which is another example of the present invention.

FIG. 6 is a front view of a reed for a weft inserting device according to a second embodiment of the present invention.

FIG. 7 is a view showing a process of manufacturing a reed for a weft inserting device in a third embodiment of the invention.

FIG. 8 is a front view of a completed reed for a weft inserting device according to a third embodiment of the present invention.

9 is a cross-sectional view taken along the line BB of FIG.

FIG. 10 is a view showing a main part of a reed wing immediately after punching.

FIG. 11 is a graph showing measured values of wind pressure at respective positions on the opening side of the weft insertion passage.

FIG. 12 is a perspective view showing a situation when the guide hole wall portion of the reed wing is polished by the polishing device.

[Explanation of symbols]

3A, 3B, 9A, 9B ... Reed, 4,5, 14, 15 ...
Guide holes 4a, 5a, 14d, 15d ... Upper wall surface, 4
b, 5b, 14e, 14g, 15e ... Back wall surface, 4c, 5
c, 14f, 14h, 15f ... Lower wall surface, 6 ... Main nozzle, 7 ... Sub nozzle, L1 ... Front section, L2 ... Rear section, S
… Weft insertion passage.

Claims (3)

[Claims] 1. A weft insert that directs a weft from a main weft insertion nozzle toward a weft insertion passage formed by a row of guide holes formed in the front surface of a plurality of reed blades and directs the weft insertion passage. In a weft inserting device in a jet loom that causes a weft to fly by the jetting action of an auxiliary nozzle for use in the weft inserting device, a slope for entering the weft inserting passage side is set on the wall surface forming each of the guide holes as the weft inserting direction increases,
Jet loom where the inclination angle of the guide hole wall surface of the reed blade arranged in the section close to the main nozzle of the reed blade row is set smaller than the inclination angle of the guide hole wall surface of the reed blade arranged in the section opposite to the main nozzle Weft insertion device. 2. A reed used for a weft inserting device in a jet loom, comprising a plurality of reeds, and forming a weft insertion passage by a row of guide holes recessed in the front of each reed, The wall forming the guide hole is provided with an inclined surface that enters the weft insertion passage side as it goes in the weft insertion direction, and the guide holes for the reed wing arranged in a section extending over a predetermined length from the weft insertion start end side of the weft insertion passage. A reed for a weft inserting device in which a second inclined surface that is inclined toward the side opposite to the weft inserting passage in the weft inserting direction is provided on the wall of the reed. 3. A method for manufacturing a reed used for a weft inserting device in a jet room, comprising a plurality of reed blades and forming a weft insertion passage by a row of guide holes recessed in the front surface of each reed blade. The wall of each guide hole of the plurality of reeds arranged with the guide holes aligned, by polishing in the direction from the weft insertion start end to the end of the weft insertion passage, weft insertion is performed in the weft insertion direction. A forward polishing process for forming an inclined surface that enters the passage side, and among the plurality of reed blades arranged with guide holes, the reed blades are arranged in a section extending over a predetermined length from the weft insertion start end side of the weft insertion passage. By polishing each guide hole wall part in the direction from the weft insertion end to the start end of the weft insertion passage,
A method for manufacturing a reed for a weft inserting device, which comprises a reverse polishing step of forming a second inclined surface that is inclined to the side opposite to the weft inserting passage as it goes in the weft inserting direction.