JP3405950B2 - Weft guide device for air jet loom - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air jet loom, which is an apparatus for positively guiding a weft yarn to a weft guide groove by an air flow in a space without reeds on a weft flight path outside a woven region. Regarding

[0002]

2. Description of the Related Art In the weft threading device disclosed in Japanese Unexamined Patent Publication No. 2-26961, an immovable aligning device (air guide) is provided between a blow nozzle and a deformed reed. The opening of the guide passage of the air guide has a funnel shape that gradually narrows toward the weft inserting direction, and the depth is formed corresponding to the swing range of the deformed reed.

Next, in the weft inserting device disclosed in Japanese Unexamined Patent Publication No. 10-204753, a funnel-shaped introduction guide passage is formed in the main wing on the weft inserting side of the modified reed so that the opening is gradually narrowed in the weft inserting direction. Is provided. During the weft insertion process, the introduction guide passage of the main wing acts as an air guide.

Further, according to the technique of the pneumatic loom disclosed in Japanese Patent Laid-Open No. 5-195377, a fixed immovable guide having a weft guide groove is arranged between a plurality of partial reeds, and the weft guide groove is partially formed. It is provided so as to line up with the weft guide groove of the partial reed when it comes near the last retreated position of the reed.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
All of them are passive in that the air guides suppress the diffusion of the upstream air flow. Therefore, the weft in the air guide is not stable, and the weft cannot be reliably guided to the downstream side. Moreover, the longer the distance of the weft guide groove of the air guide with respect to the weft insertion direction, the higher the possibility of the above phenomenon occurring.

Therefore, the object of the present invention is to positively stabilize the weft flight in the space where there is no reed on the weft flight path outside the woven fabric area by means of the air flow, thereby ensuring the weft insertion. Is to do.

[0007]

According to the present invention, the weft guide groove of the air guide formed with a nozzle for injecting an air flow in the weft inserting direction is provided in the weft guide groove on the downstream side of the air guide. Correspondingly, it is provided on the weft flight path outside the woven fabric area and in a space without reeds.

Specifically, according to the present invention, a plurality of sub-nozzles are provided along the weft guide groove so as to face the reed and face in the weft inserting direction, and at the same time, on the weft flight path outside the woven fabric region, Provide an air guide with a weft guide groove in the empty space,
In a weft guide device of an air jet loom in which the weft guide groove of the air guide is provided so as to correspond to the weft guide groove on the downstream side, the weft guide groove of the air guide is opened on either the upper surface, the lower surface, or the vicinity thereof, A nozzle for injecting an air flow in the weft insertion direction is formed in the air guide.

Here, the "weft flying path" means the flight of the weft from the main nozzle, passing through the weft guide grooves of the reed and the air guide, and reaching the anti-feeding side. Say the way. In addition, "a space without a reed on the weft flight path outside the woven fabric area" means two sheets corresponding to a location on the weft flight path between the main nozzle and the reed, where a tuck-in device is provided. Alternatively, it refers to a space between the reeds in a plurality of divided states, between the reed in the woven region and the reed for the feeler, or a reed-free space corresponding to the above-mentioned location in the central portion of one reed. Further, the "downstream weft guide groove" means a weft guide groove formed by a reed wing, or a member other than the reed wing, for example, a weft guide groove formed by another air guide on the downstream side.

The air guide is provided on the sley in the space without the reeds on the weft flying path outside the woven fabric area, or one or more air guides are provided on other than the sley. The nozzle of the air guide is directed to the weft guide groove provided on the downstream side of the air guide in the weft insertion direction. A plurality of nozzle openings are formed adjacent to each other in the warp direction along either the upper end or the lower end of the weft guide groove facing the weft insertion direction downstream side.

At the time of weft insertion, not only the weft guide groove of the air guide can suppress the diffusion of the air flow on the upstream side, but also the air is jetted from the nozzle of the air guide.
Since an air flow in the weft insertion direction is formed in the weft guide groove of the air guide, the weft rides on the air flow and is positively urged to stabilize the weft flight. As a result, the weft can be reliably guided to the downstream weft guide groove. Therefore, the number of stops due to weft insertion failure of the loom is reduced.

Further, since air is jetted from the side surface near the weft guide groove of the air guide or from the nozzle inside the weft guide groove, the biasing force and stability of the weft yarn are improved as compared with the air jet from the sub nozzle. The weft guide groove of the air guide directs the flight of the weft to the weft guide groove on the downstream side of the air guide, restricts the weft in either the vertical direction or the back direction, and moves the weft from the upstream side to the downstream side of the air guide. invite.
Moreover, since the weft guide groove formed in the air guide has a taper shape (funnel shape or trumpet shape), the weft thread easily enters the weft guide groove of the air guide, and weft insertion defects are reduced.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A weft guide device 1 for an air jet loom shown in FIGS. 1 to 4 is provided with a plurality of weft yarns so that air is jetted from a main nozzle 4 and weft yarns 2 are inserted along a weft flight path. It has a sub-nozzle 5 and an air guide 9. The plurality of sub-nozzles 5 are arranged along the weft guide groove 8 of the reed 6 formed by a plurality of reed blades 7 arranged in series, and are divided into two reeds 6 on the upstream side and the downstream side in the weft inserting direction. The front surface faces the weft guide groove 8 of the reed 6, and the injection port is provided in the weft insertion direction. Air guide 9
In this example, two are provided, which are outside the arrangement of the warp yarns 13, that is, outside the region of the woven fabric 14 between the two reeds 6 in the divided state, and on the reed flight path of the weft yarns 2. It is provided in a space without wings 7.

Each of the air guides 9 is slid so that the weft guide groove 10 of the air guide corresponds to the weft guide groove 8 or 10 on the downstream side between the reeds 6 which are separated from each other. 12 is formed integrally with the taper-shaped weft guide groove 10 opening at the front surface.
Further, one or a plurality of nozzles 11 are formed at the upper and lower positions of the weft guide groove 10, for example, one nozzle at each of the upper and lower positions.

As shown in FIG. 4, the lower portions of the two air guides 9 are connected and integrated by a connecting portion 9a, but the connecting portion 9a may be omitted. Therefore, the two air guides 9 may be separate bodies.

The taper-shaped weft guide groove 10 has a large diameter on the upstream side in the weft insertion direction and a small diameter on the downstream side, and is formed so that the inner diameter smoothly decreases between them. Further, the nozzle 11 is open at any position on the upper surface, the lower surface of the weft guide groove 10 of the air guide 9 and in the vicinity thereof. Here, the “vicinity thereof” refers to a portion of the side surface of the air guide 9 near the upper surface or the lower surface of the weft guide groove 10. The nozzle 11 of the air guide 9 on the upstream side is
The weft guide groove 10 of the air guide 9 on the downstream side is directed, and the nozzle 11 of the air guide 9 on the downstream side is directed to the weft guide groove 8 of the reed 6 on the further downstream side. In this way, the nozzle 11 is attached so that, when the air is jetted, it is directed toward the direction having the transport component force in the weft inserting direction, preferably toward the center of the weft guide grooves 8 and 10 on the downstream side. .

At the time of weft insertion, by jetting air from the main nozzle 4, the weft 2 is inserted along the weft flying path. At this time, the weft yarn 2 runs along the weft flight path in the weft guide groove 8 of the reed 6 and the weft guide groove 10 of the air guide 9, and is inserted into the opening of the warp yarn 13.

During this weft insertion process, the weft guide groove 10 of the air guide 9 suppresses the diffusion of the upstream air flow. Moreover,
An air flow in the weft insertion direction is formed in the weft guide groove 10 of the air guide 9 by jetting air from the nozzle 11 of the air guide 9, whereby the weft 2 rides on the air flow and is positively urged. Therefore, the flight of the weft 2 is stable.

Further, since air is jetted from the nozzle 11 near the weft guide groove 10 of the air guide 9, the sub nozzle 5
As compared with the air injection described above, the biasing force on the weft yarn 2 and the flight stability of the weft yarn 2 are improved. Moreover, the air guide 9 on the upstream side
The weft guide groove 10 directs the flight of the weft yarn 2 to the weft guide groove 10 of the air guide 9 on the downstream side, and regulates the weft yarn 2 in either the vertical direction or the depth direction. Moreover, since the weft guide groove 10 formed in the air guide 9 has a taper shape (funnel shape or trumpet shape), the weft thread 2 easily enters the weft guide groove 10 and weft insertion defects are reduced.

FIG. 5 is an example of another air guide 9. In this air guide 9, a plurality of nozzles 11, for example, six nozzles 11 are provided at the upper and lower positions of the side surface along the weft guide groove 10 so as to be adjacent in the warp direction. In this example, weft 2
The outer diameter of the opening (spraying port) of the nozzle 11 near the position where the weft is most conveyed, that is, near the region where the weft passes, is formed to be the largest, and the opening (spraying port) of the nozzle 11 on the front side
The outer diameter of is gradually smaller than that. In this way, the opening portion (jet port) of the nozzle 11
Since the outer diameters of the nozzles are different in the warp direction, it is possible to efficiently inject air from the nozzles 11 and reduce the consumption of extra air. Further, by forming a plurality of openings (jetting ports) and providing a permissible range, it is possible to prevent the weft 2 from jumping out of the weft guide groove 10.
It is possible to cope with variations in the flying of the weft yarn 2 due to changes in the timing of air injection and pressure. The outer diameters of the openings (injection ports) of the nozzle 11 may all be the same.

Next, in the weft guide device 1 of the air jet loom shown in FIGS. 6 to 9, one air guide 17 is provided between two reeds 6 separated from each other and the sley 1 is provided.
This is an example provided at a place other than 2, for example, by a bracket 16 integral with the loom frame 15. The air guide 17 has a taper-shaped weft guide groove 18 that opens at the front surface at a position corresponding to the weft guide groove 8 of the reed 6. The depth of the weft guide groove 18 corresponds to the swing distance (swing range) of the two reeds 6 in the divided state. One or a plurality of nozzles 19 are formed in the weft guide groove 8 of the reed 6 positioned downstream of the air guide 17 in the weft insertion direction. The outer diameters of the openings (jet ports) of these nozzles 19 are all the same. According to this example, the depth of the weft guide groove 18 corresponds to the rocking range (rocking distance) of the reed 6 in the divided state, so that the weft 2 can be moved at any position within the rocking range of the reed 6. The flight can be restricted in the weft guide groove 8 of the reed 6. Moreover, since the weft guide groove 18 is formed between the two reeds 6 in a divided state, the flight of the weft 2 is further stabilized between the two reeds 6.

FIG. 10 shows an example of another air guide 17. In the air guide 17, a plurality of nozzles 19, for example, seven nozzles 19 are provided along the weft guide groove 18 at each of the upper and lower positions of the side surface so as to be adjacent in the warp direction. The outer diameter of the opening (ejection port) of the nozzle 19 near the position where the weft 2 is most conveyed, that is, near the region through which the weft passes is formed to be the largest, and the opening (ejection port) of the nozzle 19 before and after that is formed. The diameter is gradually reduced as the outer diameter becomes further away. As described above, the outer diameter of the opening (ejection port) of the nozzle 19 is different in the warp direction, so that it is possible to obtain the same effect as when the configuration of FIG. 5 is implemented.

In the example shown in FIGS. 1 to 10, the air guide 9,
17 may be provided not only between the reeds 6 in the divided state but also between the main nozzle 4 and the reed 6. In addition, the air guide 9,
Normally, 17 is manufactured as a processed product, but it is also possible to preliminarily shape it into a mold and manufacture it as an integrally molded product.

The weft guide device 1 of the air jet loom shown in FIGS. 11 to 13 has an air guide 9 shown in FIG. 4 and an air guide 17 shown in FIG. 9 between two divided reeds 6 spaced apart from each other.
Is an example of providing. According to this example, since the synergistic effect of the action effect of the example of FIGS. 1 to 3 and the action effect of FIG. 6 to FIG. 8 is obtained, the weft yarn 2 moves from the weft guide groove 8 of the reed 6 on the upstream side to the downstream side. It is reliably guided to the weft guide groove 8 of the side reed 6. In this example, the two air guides 9
Since only one air guide 17 is provided, only the nozzle 11 of the air guide 9 may be omitted, or only the nozzle 19 of the air guide 17 may be omitted.
Of course, the air guides 9 and 17 are shown in FIGS.
It can be replaced by 0.

The air guide 9 shown in FIGS.
The outer diameter of the weft guide grooves 10 and 18 of 17 is smaller than the outer diameter of the weft guide grooves 8 and 10 and 18 located on the downstream side in the weft insertion direction, and the openings (jetting ports) of the nozzles 11 and 19 are It is formed so as to be located in a region corresponding to the weft guide grooves 8, 10 and 18 located on the downstream side in the putting direction.

1 to 3, 6 to 8,
In the example of FIGS. 11 to 13, the two reeds 6 in the divided state are completely separated. However, as can be seen from the chain double-dashed line (imaginary line) in FIG. 1, the reed 6 is integrated on the upstream side and the downstream side in the weft inserting direction by the upper frame 20 in the center thereof, and the reeds 7 are formed at the central portion. It can also be configured as a two-divided state without. As shown in FIG. 2, for example, the tuck-in device 21 is provided at a position where there is no reed wing 7.
Is provided. Such an embodiment can be applied to the examples of FIGS. 1 to 3, 6 to 8, and 11 to 13.

FIG. 14 shows that, when a plurality of wefts 2 are used, the injection timing (timing of injection start and injection) and the injection pressure of the nozzles 11 and 19 are changed for each color of the weft 2 or for each yarn type. This is an example. Multiple main nozzles 4
The injection start angles of the nozzles 11 and 19 for a, 4b, ... Are the same as the injection end angles of Θae, Θbe ,.
b, ... The rotation angle of the main shaft 23 of the loom detected by the encoder 22 is Θ. The setting device 24 sets the injection timing and the injection pressure value of the nozzles 11 and 19 for each color or type of the weft yarn 2.

The setting device 24 determines the weft insertion order of the wefts 2 by accumulating the rotation angle Θ during the operation of the loom, and the nozzles 1 for the main nozzles 4a, 4b, ...
The injection timing commands and injection pressure commands 1 and 19 are output to the injection timing control device 25 and the injection pressure control device 26, respectively. The injection timing control device 25 inputs the rotation angle Θ and controls the opening / closing valve 27 so that the injection timing (Θas · Θae, Θbs · Θbe, ...) Input from the setting device 24 is reached. Injection pressure control device 26
Is the injection pressure Pa, Pb, ...
The pressure regulator 28 is controlled so that the value becomes. In this way, the nozzles 11 and 19 inject the pressure air from the pressure air source 29 at an appropriate pressure and at an injection timing according to the color of the weft yarn 2 or the yarn type.

As a modified example, when there are a plurality of air guides 9 and 17 and a plurality of nozzles 11 and 19 are used, the air pipes from the pressurized air source 29 are distributed, and the nozzles 11, 19 and The on-off valve 27 and the pressure regulator 28 are provided independently. The air pipe configured in FIG. 14 may be added to the air pipes of the main nozzle 4 and the sub nozzle 5. A configuration may be used in which one of the injection timing and the injection pressure is changed with respect to the configuration of FIG.

FIG. 15 shows an injection angle θ of the upstream side sub-nozzle 5 adjacent to the air guides 9 and 17 with respect to the weft insertion direction.
2, the injection angle of the upstream sub-nozzle 5 adjacent thereto is θ1, the injection angle of the downstream sub-nozzle 5 adjacent to the air guides 9 and 17 is θ3, and the injection angle of the downstream sub-nozzle 5 adjacent thereto is As θ4, θ2 <θ1 = θ4 <
This is an example of setting to θ3. By increasing the jet angle, the flying of the weft yarn 2 can be suppressed within the weft guide grooves 10 and 18. Due to the large jetting angle θ3, the weft yarn 2 at that position can be less likely to be exposed.

If the jet angle θ2 is increased, the weft yarn 2 may fly out in the depth direction when the weft yarn 2 flies near the entrance of the air guide 17.
Is smaller than the others.

In the above example, the sub-nozzles 5 for setting different angles may be set not for each single sub-nozzle 5, but for each of a plurality of adjacent sub-nozzles 5. The sub-nozzle 5 near the air guides 9 and 17 may also be capable of changing either the injection timing or the injection pressure depending on the color of the weft yarn 2 or each yarn type.

In each of the above examples, the nozzle 11,
The openings (injection ports) of 19 are the respective air guides 9,
It may be provided not on the side surface of 17 but on the upper surface or the lower surface inside (inner surface) of the weft guide grooves 10, 18. Further, the nozzles 11 and 19 are assumed to have a component in the weft inserting direction and inject an air flow for guiding the weft in the weft inserting direction.

[0034]

According to the present invention, the following effects can be obtained. The weft guide groove of the air guide not only suppresses the diffusion of the upstream air flow, but also the air jet from the nozzle of the air guide creates an air flow in the weft insertion direction in the weft guide groove of the air guide. As a result, the weft yarns ride on the air flow and are positively urged to stabilize the weft yarns. As a result, the weft can be reliably guided to the downstream weft guide groove. Therefore, the number of stops due to weft insertion failure of the loom is reduced. Further, since air is jetted from the side surface of the air guide near the weft guide groove or from the nozzle inside the weft guide groove, the force and stability of the weft yarn are improved as compared with the air jet from the sub nozzle. The weft guide groove of the air guide directs the flight of the weft to the weft guide groove on the downstream side of the air guide, restricts the weft in either the vertical direction or the back direction, and moves the weft from the upstream side to the downstream side of the air guide. By guiding, weft insertion can be performed more reliably. Since the weft guide groove formed in the air guide has a taper shape (funnel shape or trumpet shape), the weft thread easily enters the weft guide groove of the air guide, and weft insertion defects are reduced.

[Brief description of drawings]

FIG. 1 is a front view of a weft guide device of an air jet loom of the present invention.

FIG. 2 is a plan view of the weft guide device of the air jet loom of the present invention.

FIG. 3 is a side view of the weft guide device of the air jet loom of the present invention.

FIG. 4 is an enlarged view of the air guide, where A is a partially cutaway plan view of the air guide, B is a vertical sectional view of the air guide, and C is a side view of the air guide.

FIG. 5 is an enlarged side view of another air guide.

FIG. 6 is a front view of the weft guide device of the air jet loom of the present invention.

FIG. 7 is a plan view of the weft guide device of the air jet loom of the present invention.

FIG. 8 is a side view of the weft guide device of the air jet loom of the present invention.

FIG. 9 is an enlarged view of the air guide, where A is a front view of the air guide, B is a plan view of the air guide, and C is a side view of the air guide.

FIG. 10 is an enlarged side view of another air guide.

FIG. 11 is a front view of the weft guide device of the air jet loom of the present invention.

FIG. 12 is a plan view of the weft guide device of the air jet loom of the present invention.

FIG. 13 is a side view of the weft guide device of the air jet loom of the present invention.

FIG. 14 is a block diagram of a control system of nozzles formed in the air guide.

FIG. 15 is a plan view of the weft guide device of the air jet loom of the present invention.

[Explanation of symbols]

1 Weft guide device for air jet loom 2 weft 4 main nozzles 5 sub nozzle 6 reed 7 reed feathers 8 Reed 6 Weft guide groove 9 Air guide 9a connection part 10 Air guide 9 weft guide groove 11 nozzles 12 sleds 13 warp 14 Woven cloth 15 loom frame 16 brackets 17 Air guide 18 Air guide 17 weft guide groove 19 nozzles 20 upper frame 21 Tuck-in device 22 encoder 23 Spindle spindle 24 Setting device 25 Injection timing control device 26 Injection pressure control device 27 on-off valve 28 Pressure regulator 29 Pressure air source

Claims (6)

(57) [Claims] 1. A plurality of sub-nozzles are provided along the weft guide groove so as to face the reed and face in the weft inserting direction,
An air guide provided with a weft guide groove is provided in a space without reeds on the weft flight path outside the woven fabric area, and the air guide groove of this air guide is provided so as to correspond to the downstream weft guide groove. In a weft guide device of a jet loom, an air guide is provided with a nozzle that opens in either the upper surface or the lower surface of the weft guide groove of the air guide or in the vicinity thereof and injects an air flow in the weft inserting direction. Weft guide device for jet loom. 2. The weft guide device for an air jet loom according to claim 1, wherein the air guide is provided on the sley between two reeds which are separated from each other. 3. The weft yarn of an air jet loom according to claim 1, wherein the air guide is provided on a member other than a sled between two reeds separated from each other and fixed in a stationary state. Guidance device. 4. The weft guide device for an air jet loom according to claim 1, 2 or 3, wherein a plurality of the air guides are arranged in parallel. 5. The weft guide of an air jet loom according to claim 1, 2, 3 or 4, wherein a nozzle of the air guide is directed to a weft guide groove provided on the downstream side of the weft insertion direction of the air guide. apparatus. 6. A plurality of nozzle openings are formed adjacent to each other in the warp direction along either the upper end or the lower end of the weft guide groove facing the weft insertion direction downstream side. 2. A weft guide device for an air jet loom according to item 2, 3, 4 or 5.