KR20030025161A - Weft Inserting Apparatus of Loom of Fluid Jetting Type - Google Patents

Abstract

PURPOSE: To prevent the weft from failing in the insertion motion by suppressing the yarn relaxation caused by the motion of the weft insertion nozzle. CONSTITUTION: In the weft insertion apparatus, the yarn holder that holds the weft at the reed beating are arranged between a plurality of the weft insertion nozzles arranged so that the weft may be movable to the insertion position and the cutter that cut the yarn weft-inserted on the yarn-feed side.

Description

Weft Inserting Apparatus of Loom of Fluid Jetting Type

Field of invention

The present invention relates to a gas injection device for a fluid injection loom having a plurality of gas injection nozzles selectively movable to the gas injection position and the standby position.

Background of the Invention

Fluid injection looms capable of multicolor weft injection generally employ a multicolor weft injection device having a plurality of weft injection nozzles corresponding to the weft weft yarns respectively. In this type of multi-color weft inserting device, there is a technique for weaving by moving the weft feed nozzles simultaneously so that one of the plurality of weft feed nozzles is located at a predetermined weft feed position (Japanese Patent Application Laid-Open No. 49-41671). Publication No. 50-48260).

In addition, in a monochromatic or multicolored weft injector of a fluid jet loom, a technique has been proposed to hold the weft weft by a fixed body which is not movable between the weft injector and the steep side cutter ( Japanese Patent Application Laid-Open No. 59-17787, Japanese Patent Application Laid-Open No. 3-81388).

However, in the former technique, when weft inserting high-strength weft yarns such as lecture yarns, the weft yarns fall out of the weft inlet nozzles due to repulsion by the cutter on the steep side, that is, nozzle detachment occurs or adjacent weft yarns. There is a problem such as intertwining with each other and disturbing the next weft.

In addition, in the latter technique, when the fixed body is fixed and applied to a multi-color gas injection device for moving a plurality of weft injection nozzles to the weft insertion position, the relative positional relationship between the weft injection nozzle and the fixed body is dependent on the movement of the weft injection nozzle. And the result is that the weft of the weft yarns between the weft injector nozzle and the fixed body results in a sagging of the weft yarn, and a weft yarn miss occurs immediately after the conversion of the weft yarn to be wefted (selected weft, ie, the weft weft). there is a problem.

That is, in the case of using a stationary body that is not movable, the stationary body is set such that the weft thread is released from the fixing at a position suitable for weft insertion and the path of the weft thread is shortened. For this reason, if the weft inlet nozzle of the target is converted into the non-selected state by the selection of the weft, the target weft inlet nozzle is moved from the weft inlet position to the position at the non-selection (standby position), whereas the fixed body is not moved. As a result, the yarn path between the target weft insert nozzle and the fixed body becomes long, and the weft of the target weft feed nozzle is taken out from the fixed body and the weft feed nozzle. As a result, when the target weft inlet nozzle is selected thereafter, sagging occurs in the weft yarn according to the movement of the target weft inlet nozzle, and the weft yarns are entangled with each other by such a sagging yarn, and the weft inlet is disturbed or the weft yarn is inclined. Weft insertion miss, such as an oblique engagement, in which the tip is inclined occurs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas injection device for a fluid jet loom which suppresses sagging caused by the movement of the gas injection nozzle and prevents gas injection failure caused by sagging.

The above and other objects of the present invention can be achieved by the present invention described below. Hereinafter, the content of the present invention will be described in detail.

1 is a plan view showing a first embodiment of the steep feed side of the weft injection device according to the present invention.

2 is a cross-sectional view taken along line 2-2 of FIG.

3 is a cross-sectional view taken along line 3-3 of FIG.

4 is a view for explaining the operation of the gas injection device shown in FIG.

5 is a plan view showing a second embodiment of the steep yarn feeding side of the weft injection device according to the present invention.

6 is a cross-sectional view taken along line 6-6 of FIG.

7 is a plan view showing the main part of the third embodiment of the steep yarn feeding side of the weft feeding apparatus according to the present invention.

8 is a cross-sectional view taken along line 8-8 of FIG.

9 is a plan view showing the main part of a fourth embodiment of the steep yarn feeding side of the weft feeding device according to the present invention;

10 is a cross-sectional view taken along line 10-10 of FIG.

11 is a plan view showing a fifth embodiment of the steep yarn feeding side of the weft feeding apparatus according to the present invention.

12 is a cross-sectional view taken along line 11-11 of FIG.

13 is a plan view showing the main part of a sixth embodiment of the steep yarn feeding side of the weft feeding device according to the present invention;

Explanation of the main symbols in the drawings

10, 70: weft insertion device 12: weft

14: Slope 16: Body

18: Rapid feed side cutter 20: Weaving direction

30: Weft insert nozzle

32, 100, 110, 120, 130: four supporters

34: rotating shaft 36: rocking member

38: nozzle holder 50: stay

52: support shaft 54: support bracket

56: yaw element 58: engaging portion

62, 106, 126, 132: yarn support 64: opening

66, 90: partition wall 72, 74: guide rail

76, 78: slider 80: axis

88: partition member 94: drive device

The weaving device of the fluid-jet loom according to the present invention includes a nozzle device having a plurality of weft injection nozzles arranged and arranged to be moved to the weft injection position, a steep side cutter for cutting the weft inserted weft yarn, and a body needle movement. And a weft support device having a weft support portion disposed between the weft feed nozzle and the cutter so that the weft feed nozzle can move in accordance with the movement of the weft feed nozzle which should support the weft yarn when it is present.

When the weft insert nozzle is selectively moved to the standby position and the weft insert position, the fixing part is also moved in accordance with the weft insert nozzle. For this reason, since the change in the weft path between the weft injector nozzle and the yarn support portion due to the movement of the weft injector nozzle is shorter than in the related art, the sagging between the weft intake nozzle and the support portion is reduced. Weft miss due to sagging decreases.

In addition, the yarn supporting device has a supporting member which is moved in accordance with the movement of the weft inserting nozzle as a support member separate from the member which is integrally moved with the weft inserting nozzle, and the supporting member has It can support the yarn support to be moved in accordance with the movement of the injection nozzle.

In addition, the yarn supporting device has a supporting member provided on a member which is integrally moved with the weft inserting nozzle, and the support member is capable of supporting the yarn supporting portion which needs to move the yarn supporting portion in accordance with the movement of the weft feeding nozzle. Can be.

In addition, the weft inserting device may include one or more partition walls that define weft yarns extending from neighboring weft insert nozzles. By doing so, even if the yarn is dropped due to the movement of the weft-inserting nozzle, the entanglement of the weft yarns adjacent to each other is prevented by the partition wall.

The yarn supporting device may be provided with a plurality of yarn supporting portions respectively provided corresponding to the weft inserting nozzles and moved according to the movement of the corresponding weft inserting nozzles. In this case, since the change in the weft path between the weft injector nozzle and the yarn supporter due to the movement of the weft injector nozzle is shorter, the sagging between the weft injector nozzle and the support part is reduced more. Weft insertion miss by sagging decreases more.

1 to 3 show an example in which the present invention is applied to a multi-color gas injection device 10 of a water-jet loom using pressure water as the fluid for weaving. In the weft injecting device, the weft yarn 12 is wefted into the opening of the inclined 14 by the pressure water, is fixed by the body 16 immediately before, and is steeped by the yarn feeder cutter 18. Is cut.

In Fig. 1, the weaving direction is indicated by an arrow 20, the yarn weaving side is indicated by a dashed line 22, and the weft insertion end edge of the moving range of the body 16 is indicated by a dashed line 24. . The body 16 has an opening 26 that receives a portion of the cutter 18 when there is a body beed.

In addition, the weft injection device 10 corresponds to a nozzle device having a plurality (two in the example) weft injection nozzles 30 respectively corresponding to the weft insertable weft yarns 12 and the weft injection nozzles 30 respectively. And a yarn feeder supporting device having a plurality of yarn supporters 32 which support the weft yarn 12 extending from the corresponding weft feed nozzle 30.

The nozzle apparatus is provided so that the swinging member 36 can be rotated angularly (swinging or rotating) together with the rotating shaft 34 on the rotating shaft 34 which is rotated angularly around an axis extending in the weaving direction. A plurality of nozzle holders 38 respectively corresponding to 30 are provided in the swinging member 36, and each weaving nozzle 30 is provided in the corresponding nozzle holder 38. As shown in FIG.

The rotary shaft 34 is disposed at a position upstream from the weft injection nozzle 30 in the direction of movement of the inclination 14, and is rotatably supported by a flame (not shown), and weft weft to be inserted. In accordance with the change of the (selective weft), an appropriate drive device such as an electric motor or a swinging comb, which is not shown, is rotated angularly (a swinging drive) around an axis extending in the weft-insertion direction.

The swinging member 36 sandwiches the disengagement structure of one end of the rotary shaft 34 and is detachably attached to the rotational shaft 34 by a plurality of screw members 40 in the disengagement structure.

The rocking member 36 and the nozzle holder 38 are fitted with the concave portion (not shown) of the rocking member 36 to the concave portion (not shown) of the nozzle holder 38, It is relatively locatingly coupled and is integrally swung around the axis of the rotational shaft 34 in accordance with the rotational movement of the rotational shaft 34.

Each nozzle holder 38 has a boss-shaped mounting portion 42 on the downstream side in the moving direction of the inclined 14 with the weft injection nozzle 30 facing the inclined 14. Installed in

Each weft injector nozzle 30 has its fluid jet port facing the inclined 14 side, and the fluid jet port is located on an imaginary arc centered around the axis of the rotation axis 34 and passing through a predetermined weft slot position. The nozzle holder 38 is disposed so as to correspond to the nozzle holder 38. For this reason, the some weft injection nozzle 30 is provided in the nozzle holder 38 and the oscillation member 36 in the state arranged in parallel on the virtual circular arc.

The rotary shaft 34, the swinging member 36, and the nozzle holder 38 are provided with flow paths for the pressure water sprayed from the weft injection nozzle 30 together with the weft yarn for each weft injection nozzle 30. Corresponding flow paths of the rocking member 36 and the nozzle holder 38 are connected by a pipe 44. The pressure water as the working fluid is transferred from the pump (not shown) to the predetermined wetting nozzle 30 through the flow path of the rotary shaft 34, the flow path of the rocking member 36, the pipe 44, and the flow path of the nozzle holder 38. It is supplied at a predetermined timing.

The injection directions of the fluid and the weft yarn from the fluid injection port of each weft injection nozzle 30 are manually adjusted by a nozzle adjusting device provided for each nozzle holder 38. The nozzle adjusting device also has a function of connecting each nozzle holder 38 to the swinging member 36.

Each nozzle adjusting device has a plurality of screw members 48 coupled to the nozzle holder 38 through the base plate 46 provided on the swinging member 36, and also has a screw member 48 to the nozzle holder 38. By adjusting the screw insertion degree of the < RTI ID = 0.0 >), the corresponding nozzle holder 38 < / RTI >

The nozzle apparatus of the above structure is described, for example in Unexamined-Japanese-Patent No. 2000-131848.

The yarn support device on the steep side with a plurality of yarn supporters 32 is provided on the weft path defined by the weft inlet nozzle 30 and the body 16 when there is a body needle movement, and the weft yarn when there is a body needle movement. The support part 62 mentioned later provided in order to support is arrange | positioned. More specifically, the yarn supporting device supports the stay 50 extending in the up and down direction on a flame (not shown), and supports the support shaft 52 extending in the weft insertion direction so as to be swingable on the stay 50. The support bracket 54 is attached to the support shaft 52, and the yarn supporter 32 is attached to the support bracket 54.

As shown in Fig. 3, the support bracket 54 has a tapered engaging portion 58 positioned between the pins 56 formed between the mounting portions 42 of the nozzle holders 38 adjacent to each other. For this reason, the support bracket 52 oscillates by engagement of the attachment part 58 to the pin 56 of the installation part 42, when both the nozzle holders 38 are integrally rocked, and accordingly, By being moved, it swings around the axis line to the support shaft 52.

Each yarn supporter 32 is formed of a pair of plate members. One end of both plate members is provided on the support bracket 54 by at least one screw member 60 in a state spaced in the weft insertion direction.

One end of both plate members is formed between the two plate members by a water film formed by water droplets scattering in a fog around the jet of pressure water from the weft injection nozzle 30, and the weft yarns 12 are formed by the viscosity of the water film. The gap which functions as the yarn support part 62 which supports is formed.

The other ends of the two plate members are bent in an eight-shape to form an opening 64 extending from the yarn support portion 62 to the fluid injection port of the weft injection nozzle 30. Each yarn supporter 32 is opened so that the opening 64 is open from the corresponding weft injector 30 toward the weft injected with the fluid, in other words, the yarn support 62 is inclined more than the opening 64 in the moving direction. It is formed so that it may be downstream, and the yarn support part 62 will be located downstream from the inclined movement direction rather than the opening part 64, and is arrange | positioned at the support bracket 54. As shown in FIG.

Of the plate member which forms each opening part 64, the part of the adjacent yarn supporter 32 side acts as the partition wall 66 which partitions the weft thread extended from the weft insertion nozzle 30. As shown in FIG. The partition wall 66 extends from the yarn support portion 62 toward the weft insert nozzle 30, particularly between the weft yarns which are injected with the fluid from neighboring weft insert nozzles 30.

In the weft inserting device 10, as shown in Fig. 4A, any one of the weft inserting nozzles 30 is moved to a predetermined weft inserting position, and at the same time, the corresponding weft retainer 32 is supported. Is moving to a predetermined position. Further, the tip end of the weft yarn protruding from each weft injection nozzle 30 is cut off from the fabric by the cutter 18 and is releasably supported by the yarn support portion 62 of the corresponding yarn supporter 32. .

When the selection weft is converted, the rotary shaft 34 is rotated in an angle according to the selection weft. As a result, the swinging member 36 is rotated in an angle, the support bracket 38 is rotated in an angle, and as shown in Fig. 4B, the weft-insert nozzle 30 corresponding to the selected weft is in the weft-inserted position. Instead of moving to, the weft inserting nozzle 30 corresponding to the last selected weft is moved from the weft inserting position, and each yarn supporter 32 is moved to a predetermined position in accordance with the movement of the weft inserting nozzle 30. Is moved.

In the above state, the selected weft is injected together with the fluid from the corresponding weft injection nozzle 30, and weft is inserted into the inclined opening. At this time, the part of the selection weft which was supported by the yarn supporter 32 escapes from the yarn supporter 32 according to the scattering of the selection weft yarn, and is disengaged from the support by the yarn supporter 32.

As the weft yarn weft-injected, the body needle movement occurs immediately before the body 26, and the steep yarn side is received and supported by the yarn supporter 32 in accordance with the body needle movement. At this time, since the opening 64 of the yarn supporter 32 is open to the weft inserting nozzle 30 side, the yarn weft side of the weft yarn is smooth to the yarn supporter 32 via the opening 64. It is received reliably and is reliably supported by the yarn supporter 32.

Thereafter, the weft portion connected from the fabric to the weft insert nozzle 30 at a predetermined timing is cut by the cutter 18 between the fabric and the yarn supporter 32.

The process is performed every time the selection weft is converted. However, when the same weft is selected for the next weft insertion, the weft insertion nozzle 30 is not moved, and weft insertion is performed.

As described above, when the yarn supporter 32 is moved in accordance with the movement of the weft inserting nozzle 30, the length of the weft path between the weft inserting nozzle 30 and the corresponding yarn supporter 32 does not change. Therefore, the yarn sagging between the weft inserting nozzle 30 and the yarn support part 62 is reduced, and the weft insertion miss by the yarn sagging is reduced.

Also, at the time of weft entry immediately after weft conversion, the state of the weft tip at the time of weft discharging (at the time of injection) becomes the same as that at the time of weft injection when the weft is continuously selected. It is easy to set the weaving conditions such as the injection amount, the fluid injection timing, and to adjust the loom.

In the weft inserting device 10, a portion of the plate member of the yarn supporter 32 that forms the openings 64 extends from the position of the two yarn support portions 62 toward the weft feed nozzle 30. Since it acts as the partition wall 66, even if the yarn is dropped by the movement of the weft injection nozzle 30, entanglement of mutually adjacent weft threads is prevented by the partition wall 66.

In the said embodiment, although the partition wall is formed in the yarn supporter, you may form a partition wall by a member separate from the member which forms the yarn supporter, especially the yarn support part. Instead of forming the openings in the yarn supporter, the openings may be formed by other members, or the openings and the partition walls may be formed by the same member.

5 and 6, the weft insertion device 70 is provided with a pair of guide rails (72, 74) in the frame of the loom at intervals in the moving direction of the inclined 14, sliders 76 and 78 ) Are supported by the guide rails 72 and 74 so as to be movable in the widthwise direction.

The slider 76 is movably supported along the axis 80 extending in the oblique opening direction, and the pipes 44 respectively supply pressure water supplied from a plurality of pipes 82 in the illustrated example. It has a plurality of flow paths to guide to.

The nozzle holder 38 to which the weft injection nozzle 30 is mounted is attached to the slider 76. Each yarn supporter 32 is a weft injection nozzle 30 having an opening 64 corresponding to the supporter 84 mounted on the slider 78 and the screw member 86 coupled to the supporter 84. It is provided in the slider 78 so that it may open toward the weft injected with the fluid from.

In addition, the weft insertion device 70 is provided with the partition member 88 formed by the plate member bent in L shape. In the illustrated example, the partition member 88 is blocked on one side of the neighboring weft injection nozzles 30 so that the bent members act as partition walls 90 for partitioning the weft yarns extending from the neighboring weft injection nozzles 30 adjacent to each other. It is provided by the nut 92. The partition wall 90 extends from the yarn supporting portion 62 toward the weft inserting nozzle 30, in particular between the wefts which are injected together with the fluid from the neighboring weft inserting nozzles 30.

The sliders 76 and 78 are guided by an appropriate drive device 94 such as a linear motor or a cylinder mechanism connected so that the weft inserting nozzle 30 corresponding to the selection weft is in a predetermined weft insertion position in accordance with the change of the selection weft. The rails 72 and 74 are linearly moved together in the longitudinal direction. For this reason, the weft injection nozzles 30 are arranged in parallel in the direction of movement of the sliders 76 and 78.

When the sliders 76 and 78 are moved, the weaving nozzle 30, the yarn supporter 32, and the partition wall 90 are integrally moved. For this reason, the same effect as the above-mentioned injection device 10 also occurs in the above-mentioned injection device 70.

In any of the above embodiments, the yarn supporter 32 is provided in the members 54 and 78 which are moved along the nozzle holder 38. However, the yarn support nozzle 30, the nozzle holder 38, and the like are provided. It may be provided on another member that moves integrally with the weft insert nozzle.

7 and 8, each yarn supporter 100 is blocked by the end of the fluid injection port side of the corresponding weft injection nozzle 30, and provided by the nut 102. As shown in FIG. Each yarn supporter 100 is formed using an L-shaped plate member consisting of a long region and a fragment region, and is attached to the weft insertion nozzle 30 in the fragment region.

In detail, each yarn supporter 100 supports the weft yarn by the installation portion 104 in which the fragment region is bent at an almost right angle to the long region, and the long region is folded in a U-shape toward the fragment region. It has a possible yarn support 62, an opening 64 in which both ends of the long region are bent in an eight shape, and a partition wall 106 formed by one end of the long region.

Each yarn supporter 32 has a yarn support portion 62 downstream from the opening 64, and the opening 64 is opened toward the weft yarn which is injected with the fluid from the corresponding weft injection nozzle 30, and the partition The wall 106 is provided in the weft nozzle 30 so as to extend between the yarn supporters 100 adjacent to each other and between the weft yarns extending from the neighboring weft nozzle 30.

According to the weft inserting device provided with the yarn supporting device 100 as described above, not only the same effect as the weft feeding devices 10 and 70 can be obtained, but also the yarn supporting device 100 of the weft feeding nozzle 30 can be obtained. It is not necessary to have a special member to move in accordance with the movement.

Also in any of the above embodiments, when there is a body needle movement, a part of the weft yarn 12 is received in the opening 64 of the yarn supporter and moves obliquely from the opening 64 to the yarn support 62. A portion of the weft yarn 12 is received by the yarn support 62, and then the area received by the yarn support 62 in accordance with the movement of the weft yarn 12 in the yarn support 62 gradually becomes longer. The resulting weft is finally supported at an angle to the yarn supporter.

However, as shown in Figs. 9 and 10, a predetermined length region of the weft yarn 12 is simultaneously received in the opening 64 in accordance with the body needle movement, and from the opening 64 to the yarn supporting portion 62 in that state. The yarn supporter 110 may be arrange | positioned so that it may move. By doing so, since the predetermined length area of the weft yarn 12 moves simultaneously from the opening portion 64 to the yarn support portion 62, the bearing force on the weft yarn 12 is rapidly increased.

Instead of the yarn supporter which supports the weft by the viscosity of water as mentioned above, the yarn supporter which sandwiches and supports the weft yarn in two places, and the yarn supporter which supports on one side instead of supporting the weft yarn on two sides Etc., you may use the yarn support which supports a weft thread by suitable means other than water. In addition, instead of having a yarn supporter for every weft insertion nozzle, you may use one yarn supporter in common with a some weft injection nozzle.

11 and 12 block one yarn support 120 against one weft feed nozzle 30 such that a portion thereof is inclined toward the inclined 14 side and the upstream side downstream from the weft feed nozzle 30. 122), and they are commonly used by the plurality of weft injection nozzles 30.

The yarn supporter 120 is provided with the plate member 124 bent in a Z shape and provided in the upper injection nozzle, and the yarn support part 126 formed in the sheet | seat shape in the recessed part area | region of the plate member 124. As shown in FIG. The yarn support portion 126 is a support member capable of supporting the weft yarn by elastic force, such as a mocket or a linear body having an arcuate cross section, such as nylon tether, and in particular, a support member having a large support force for the yarn. It can form by adhering in the sheet | seat part area | region of the member 124 in a sheet form.

In the yarn supporter 120, the weft yarn 12 is the yarn supporter 126, in more detail, between the body 16 and the weft inserting nozzle 30 while being moved downstream (just before) along the body needle. Is supported by contact with the congested area protruding with respect to the yarn path. The supported weft portion is separated from the yarn support 126 as the weft yarn 12 scatters at the next weft entry.

Referring to Fig. 13, the yarn supporter 130 supports the weft yarn 12 by the viscosity of the water film instead of the yarn support portion using the support member. The yarn supporter 130 is installed in the weft feed nozzle 30 like the yarn supporter 120, but the opposite side to the installation side to the weft feed nozzle, that is, the yarn support 132 is in the weft feed direction and inclined. It extends obliquely downstream in both directions of movement.

In the yarn supporter 130, the weft yarn 12 is a water film formed in the yarn supporter 132 between the body 16 and the weft insert nozzle 30 in the middle of being moved downstream (just before) along the body needle. It is supported by the yarn support part 132 by it. The supported weft portion is separated from the yarn support portion 132 as the weft yarn 12 is scattered at the next weft entry.

The partition wall may not be formed continuously over the entire area from the yarn supporter to the weft insert nozzle, and may be formed in a part of such an area as long as it has a function of preventing entanglement of neighboring weft yarns. It may be formed in a plurality of spaced intervals such as, and partition walls may not be formed depending on the thread type of the weft yarn. In addition, the partition wall may not be a partition wall forming a plane, but may be a partition wall having a surface having a different shape such as an uneven surface or a surface having a plurality of holes.

The present invention is not limited to the above embodiment. For example, the present invention can be applied to a fluid jet loom having three or more weaving nozzles, and can also be applied to other fluid jet looms such as an air jet loom except for a yarn supporter supporting the weft yarn by the viscosity of water. have. Therefore, various changes are possible for this invention, as long as it does not deviate from the meaning.

The present invention has the effect of providing a gas injection device for a fluid-jet loom which suppresses the sagging caused by the movement of the gas injection nozzle and prevents the gas injection failure caused by the sagging.

Simple modifications and variations of the present invention can be readily used by those skilled in the art, and all such variations or modifications can be considered to be included within the scope of the present invention.

Claims (5)

A nozzle apparatus having a plurality of weft insert nozzles arranged and arranged to be moved to the weft inserting position, a yarn feeder cutter for cutting the weft inserted weft yarn, and a movement of the weft feed nozzle supporting the weft yarn when there is a body needle movement And a yarn support device having a yarn support portion disposed between the weft injection nozzle and the cutter so as to be movable in accordance with the weft injection nozzle. According to claim 1, wherein the yarn supporting device is a support member which is moved in accordance with the movement of the weft injection nozzle as a support member separate from the member moving integrally with the weft injection nozzle, the support member is the yarn A weaving injection device for a fluid jet loom, characterized in that for supporting the yarn support portion to be moved in accordance with the movement of the weft injection nozzle. The yarn supporting apparatus of claim 1, wherein the yarn supporting device includes a supporting member installed on a member that is integrally moved with the weft inserting nozzle, and the support member moves the yarn supporting portion in accordance with the movement of the weft inserting nozzle. A gas injection device for a fluid injection loom characterized by supporting a support portion. The weft injector of claim 1, 2 or 3, comprising at least one partition wall for partitioning the weft yarns extending from neighboring weft injectors. 5. The yarn supporting device according to any one of claims 1 to 4, wherein the yarn supporting device has a plurality of yarn supporting parts which are respectively provided corresponding to the weft inserting nozzles and are moved in accordance with the movement of the corresponding weft feeding nozzles. Upper injection device of the fluid injection loom.