JP5892128B2 - Main nozzle device of air jet loom - Google Patents

Description

  The present invention relates to a main nozzle device of an air jet loom provided with a plurality of main nozzles for weft insertion in order to insert a plurality of wefts.

For example, Patent Document 1 discloses a nozzle device for inserting a plurality of wefts in an air jet loom having a plurality of nozzles corresponding to a plurality of wefts. In this nozzle device, a plurality of nozzles are held by a nozzle holding body fixed to a wrinkle holding body (slay) that moves integrally with the wrinkles, and the tip portions of the nozzles are arranged together.
The nozzle holder is composed of a nozzle holder and a nozzle housing, and the nozzle housing is inserted and fixed in a through hole of the nozzle holder. In the nozzle housing, four weft insertion needle nozzles are inserted and fixed. A jet guide tube is connected to the distal end side of the weft insertion needle nozzle via an orifice member. The tip end side of the jet guide tube is supported by an L-shaped support, and the L-shaped support is fixed to the nozzle holder. The nozzle holder is fixed to the base block, and this base block is inserted into the weft insertion side of the mounting groove of the heel holder and fixed via a wedge.
Along with the swinging movement of the heel holder, the nozzle holder fixed to the heel holder also swings integrally.

Japanese Utility Model Publication No. 62-118182

  However, in the prior art disclosed in Patent Document 1, a nozzle holder (nozzle holder) that holds a plurality of nozzles is fixed to a base block, and this base block has a wedge in a mounting groove of a heel holder (slay). There are the following problems. That is, the nozzle housing that holds the four nozzles is large in volume and mass, and the nozzle housing portion may vibrate in the swinging direction during high-speed operation accompanying the swinging motion of the rod holder. Further, since the nozzle housing becomes larger as the number of nozzles increases, the vibration of the nozzle housing portion also increases. This vibration may lead to a deterioration of the tip posture at the time of weft insertion, which may cause a weft insertion failure. Further, when the vibration becomes large, the nozzle holder itself moves in the left-right direction, which may cause a weft insertion failure.

  The present invention relates to a main nozzle device of an air jet loom capable of suppressing vibration of a main nozzle held in a nozzle holding portion by suppressing vibration in a swinging direction of a nozzle holding portion that holds a plurality of nozzles. The purpose is to provide.

According to the first aspect of the present invention, there are provided a plurality of main nozzles for weft insertion and a nozzle holding portion for holding a base end portion of the main nozzle, and the main nozzle is fixed to a mounting groove formed on the rear side of the sley. A main nozzle device of an air jet loom that swings integrally with the sley as the sley swings, and connects the front surface of the nozzle holding portion and the front side of the sley, An auxiliary bracket for suppressing vibration in the swinging direction of the nozzle holding portion in cooperation with the main bracket is provided.

According to the first aspect of the present invention, the main bracket and the auxiliary bracket cooperate with each other by providing the auxiliary bracket for connecting the nozzle holding portion and the sley and suppressing the vibration in the swinging direction of the nozzle holding portion. Thus, it is possible to suppress the vibration of the main nozzle held by the nozzle holding part. Furthermore, since the auxiliary bracket is attached to the front surface of the nozzle holding portion, it is easy to perform the attaching operation of the auxiliary bracket to the nozzle holding portion. In addition, the front surface of the nozzle holding part refers to the woven fabric winding side of the air jet loom.

  According to a third aspect of the present invention, in the main nozzle device of the air jet loom according to the second aspect, the auxiliary bracket is bent at an end portion and attached to the front surface of the nozzle holding portion, and the bent portion. And a main body portion having a front side portion and a plate thickness direction coinciding with the left-right direction.

  According to the invention described in claim 3, it is possible to increase the rigidity of the auxiliary bracket against the force acting in the swinging direction, and it is possible to fix the nozzle holding portion more firmly so as not to vibrate.

  According to a fourth aspect of the present invention, in the main nozzle device of the air jet loom according to any one of the first to third aspects, the auxiliary bracket is arranged in the left-right direction of the air jet loom on the front side of the sley. It is possible to move along the formed guide groove.

  According to the invention described in claim 4, since the auxiliary bracket can be moved in the left-right direction along the guide groove, the left-right direction of the main nozzle device is released without releasing the connection between the nozzle holding portion and the auxiliary bracket. Can be adjusted.

  According to a fifth aspect of the present invention, in the main nozzle device of the air jet loom according to any one of the first to fourth aspects, the air jet loom automatically processes a weft that has a poor weft insertion. A suction device for supporting the suction duct of the automatic weft processing device, the suction duct bracket being fixed to the front side of the sley, and the suction duct bracket and the nozzle. A connecting member is provided for connecting the holding portion to the suction duct bracket so that the nozzle holding portion can move in the left-right direction of the air jet loom.

  According to the fifth aspect of the present invention, since the position of the main nozzle device can be adjusted in the left-right direction even while the suction duct bracket is fixed to the front side of the sley, the position of the suction duct is set to the main nozzle device. It can be fixed independently of the position adjustment. Further, since the suction duct bracket can be used as an auxiliary bracket, there is no need to newly install an auxiliary bracket, and the apparatus can be simplified.

  According to the present invention, it is possible to suppress the vibration of the main nozzle held by the nozzle holding part by suppressing the vibration in the swinging direction of the nozzle holding part that holds the plurality of nozzles.

It is a schematic plan view which shows the main nozzle apparatus of the air jet loom in 1st Embodiment. It is a schematic front view which shows the main nozzle apparatus of the air jet loom in 1st Embodiment. It is a schematic perspective view which shows the main nozzle apparatus of the air jet loom in 1st Embodiment. FIG. 3 is a partial sectional view taken along line KK in FIG. 2. It is a schematic front view which shows the main nozzle apparatus of the air jet loom in 2nd Embodiment. It is a schematic perspective view which shows the main nozzle apparatus of the air jet loom in 2nd Embodiment.

(First embodiment)
A first embodiment will be described with reference to FIGS. In the present specification, the lower part of FIG. 1 will be described as the front of the loom on the woven fabric winding side, and the upper part of FIG. 1 will be described as the rear of the loom on the warp feeding side. Further, the left side in FIG. 1 is the left side of the loom, the right side is the right side of the loom, the direction perpendicular to the paper surface of FIG. 1 is the vertical direction of the loom, the front side of the paper surface is the upper side, and the back side of the paper surface is the lower side. explain.

As shown in FIG. 1, a main nozzle device 10 of an air jet loom includes a plurality of main nozzles 11 for weft insertion and a main bracket 14 that has a nozzle holding portion 12 that holds the main nozzle 11 and is fixed to a sley 13. And. The slay 13 is provided in front of the air jet loom and extends in the width direction (left-right direction) of the air jet loom. A deformed rod 20 is held on the sley 13.
A main nozzle 11 is disposed at the left end of the slay 13. The main nozzle 11 is composed of eight main nozzles 11A to 11H. The main nozzles 11A to 11H use eight colors of wefts, and one main nozzle is used for each color. Of the eight, four main nozzles 11A to 11D are arranged in parallel in the front-rear direction of the loom. The other four main nozzles 11E to 11H are similarly arranged in parallel in the front-rear direction of the loom and are disposed below the main nozzles 11A to 11D (see FIGS. 2 and 3).

  The main nozzles 11 </ b> A to 11 </ b> H are held by a main bracket 14 that is fixed to the slay 13. The main bracket 14 has a nozzle holding portion 12 that holds the base end portions of the main nozzles 11A to 11H, and an attachment portion 15 that extends from the nozzle holding portion 12 along the longitudinal direction (left-right direction) of the slay 13. doing. The nozzle holding part 12 and the attachment part 15 are integrally formed. At the tip portions of the main nozzles 11A to 11H, there are provided injection ports for injecting the weft Y by air jet.

  As shown in FIGS. 1-3, the nozzle holding part 12 has a rectangular parallelepiped shape, and includes a front surface 12A, a rear surface 12B, a right side surface 12C, a left side surface 12D, an upper surface 12E, and a lower surface 12F. Main nozzles 11A to 11H protrude from the right side surface 12C toward the right. A mounting portion 15 extends from the rear surface 12B to the right.

As shown in FIG. 1, the attachment portion 15 is formed with two long holes 15A penetrating in the vertical direction and having a predetermined length in the horizontal direction. The attachment portion 15 is fitted in an attachment groove 13 </ b> A formed in the slay 13. As shown in FIGS. 1 and 3, the mounting groove 13 </ b> A is formed in the left-right direction on the rear side of the slay 13 and has a recessed shape.
The main bracket 14 is fixed to the sley 13 by fitting the mounting portion 15 into the mounting groove 13A, inserting a bolt 15B through the long hole 15A, and screwing it into a screw hole (not shown) formed in the mounting groove 13A. In addition, the position of the main nozzles 11A to 11H in the left-right direction can be adjusted by loosening the bolt 15B and moving the mounting portion 15 in the left-right direction along the mounting groove 13A.

  The front end sides of the main nozzles 11A to 11H are arranged to gather. A holding member 16 that holds the tip side of the main nozzles 11A to 11H is provided on the tip side of the main nozzles 11A to 11H. The holding member 16 is fixed to the mounting portion 15 of the main bracket 14 by a bolt 17.

As shown in FIG. 1, eight guide ports 18 that communicate with the main nozzles 11 </ b> A to 11 </ b> H and guide the weft Y are provided on the left side surface 12 </ b> D of the nozzle holding unit 12. Eight wefts Y are supplied to the main nozzles 11A to 11H through a guide port 18 from a yarn feeder (not shown).
At the left end of the nozzle holding part 12, eight pipe parts 19 that communicate with the main nozzles 11A to 11H and supply compressed air to the main nozzles 11A to 11H are provided. Compressed air is supplied from the compressed air source (not shown) to the main nozzles 11A to 11H through the piping unit 19.
The weft Y supplied from each guide port 18 flies rightward in the main nozzles 11 </ b> A to 11 </ b> H by compressed air from each pipe section 19.

  As shown in FIG. 2, a deformed kite 20 indicated by a two-dot chain line is erected on the right slay 13 of the main nozzles 11 </ b> A to 11 </ b> H, and a weft guide passage 21 is formed by a recess formed in the deformed kite 20. Has been. The injection ports at the tip portions of the main nozzles 11 </ b> A to 11 </ b> H are directed into the weft guide passage 21. The weft Y that flies rightward in the main nozzles 11A to 11H is ejected from the injection port at the tip of the main nozzles 11A to 11H, and is inserted in the weft guide passage 21 to the right.

  As shown in FIGS. 2 and 3, an auxiliary bracket 22 that connects the front surface 12 </ b> A of the nozzle holding portion 12 and the slay 13 is provided. The auxiliary bracket 22 is formed as a separate member from the main bracket 14. The auxiliary bracket 22 has a shape in which the side surface shape is bent in a bowl shape. The auxiliary bracket 22 is formed at the left end portion of the auxiliary bracket 22, has a bent portion 22A bent at a right angle, and a portion on the nearer side than the bent portion 22A, and a body portion 22B whose plate thickness direction matches the left-right direction. And have. The bent portion 22A abuts on the front surface 12A of the nozzle holding portion 12 and is fixed to the front surface 12A by a bolt 23. The auxiliary bracket 22 is formed of a metal member having a predetermined thickness and rigidity.

  As shown in FIG. 2, a support block 24 is provided at the right end of the auxiliary bracket 22, and the auxiliary bracket 22 and the support block 24 are integrally fixed by a bolt 25. The support block 24 is fixed to a guide groove 27 formed on the front surface of the sley 13 by a bolt 28 and a nut 29 so as to be movable left and right. As shown in FIG. 4, a guide groove 27 is formed through the sley 13 in the left-right direction. The opening 27 </ b> A is set narrower than the width of the guide groove 27. The support block 24 is formed with two through holes 24A penetrating in the thickness direction.

As shown in FIG. 4, the head of the bolt 28 is inserted into the guide groove 27 from the side, and the screw portion of the bolt 28 is disposed so as to protrude outward from the opening 27 </ b> A. The support block 24 can be fixed to the slay 13 by inserting the through-hole 24 </ b> A and screwing the nut 29 into the threaded portion of the bolt 28.
Further, the support block 24 can be moved in the left-right direction along the guide groove 27 by loosening the fastening of the nut 29 and the bolt 28. That is, the auxiliary bracket 22 integrated with the support block 24 can also adjust the fixing position in accordance with the position adjustment of the main bracket 14 in the left-right direction.

The operation of the main nozzle device 10 of the air jet loom having the above configuration will be described.
The weft Y is injected from the selected main nozzle (any one of the main nozzles 11 </ b> A to 11 </ b> H) and is inserted into the weft guide passage 21. When the weft insertion is completed, the weft Y is beaten by the deformed kite 20 to form a woven fabric (not shown).
The hitting with the deformed rod 20 is performed by swinging the sley 13 supporting the deformed rod 20 in the front-rear direction by a drive mechanism (not shown). This weft insertion and hammering is repeated, and the repeated cycle is operated at a high speed of about 1000 revolutions per minute, for example, in a loom currently in operation.

As the sley 13 swings, the main bracket 14 fixed to the slay 13 also integrally swings back and forth.
By the way, the nozzle holding portion 12 of the main bracket 14 holds the base end portions of the eight main nozzles 11A to 11H, the eight guide ports 18 for guiding the weft Y to the main nozzles 11A to 11H, and Eight piping parts 19 for supplying compressed air to the main nozzles 11A to 11H are provided. For this reason, since the nozzle holding part 12 is enlarged and has a large mass, it receives a large force (inertial force) as the slay 13 swings. Incidentally, the magnitude of the inertial force F can be represented by the mass m of the object multiplied by the acceleration a of the object (F = ma). In the present embodiment, the inertial force F acting on the nozzle holding part 12 increases as the mass of the nozzle holding part 12 increases or as the rotational speed of the swing motion of the slay 13 increases. The inertia force F may cause the nozzle holding portion 12 to vibrate in the front-rear direction.

  However, the mounting portion 15 of the main bracket 14 is fitted in the mounting groove 13A of the sley 13 and fixed to the slay 13 with two bolts, and in addition, connects the front surface 12A of the nozzle holding portion 12 and the sley 13. Since the auxiliary bracket 22 is provided, the nozzle holding portion 12 is firmly fixed in the front-rear direction by the main bracket 14 and the auxiliary bracket 22, and vibration in the swing direction of the nozzle holding portion 12 is suppressed. That is, since the nozzle holding part 12 which is large and has a large mass can be firmly fixed to the slay 13 by the cooperation of the main bracket 14 and the auxiliary bracket 22, vibration in the swing direction of the nozzle holding part 12 is suppressed. Is possible. In particular, the main body portion 22B of the auxiliary bracket 22 is arranged so that the plate thickness direction coincides with the left-right direction, whereby rigidity can be increased with respect to a force acting in the swinging direction. Therefore, it is possible to fix the nozzle holding part 12 more firmly so as not to vibrate. As a result, it is possible to suppress the vibrations of the main nozzles 11A to 11H held by the nozzle holding unit 12. By suppressing this vibration, weft insertion failure of the weft Y is prevented as compared with the prior art. Further, the movement of the main bracket 14 in the left-right direction due to the vibration of the main bracket 14 can be prevented.

Adjustment of the left and right positions of the main nozzles 11 </ b> A to 11 </ b> H is performed by moving the main bracket 14 along the slay 13 in the left and right direction. Since the two elongated holes 15A are formed in the mounting portion 15 of the main bracket 14, the mounting portion 15 is moved in the left-right direction along the mounting groove 13A, and the left and right positions are adjusted. Tighten.
At this time, the bent portion 22A of the auxiliary bracket 22 is fixed to the front surface 12A of the nozzle holding portion 12, and the support block 24 that is integrally fixed to the auxiliary bracket 22 moves to the left and right along the guide groove 27 formed on the front surface of the sley 13. It can move in the direction.

Therefore, when the left and right positions of the main nozzles 11A to 11H are adjusted, the following procedure may be performed.
First, the two bolts 15B inserted through the elongated holes 15A of the mounting portion 15 are loosened, and simultaneously the bolts 28 and nuts 29 inserted through the through holes 24A of the support block 24 are loosened.
Next, the left and right positions are adjusted by moving the mounting portion 15 of the main bracket 14 in the left-right direction along the mounting groove 13A. At this time, the auxiliary bracket 22 fixed to the front surface 12 </ b> A of the nozzle holding part 12 moves in the left-right direction along the guide groove 27 as the main bracket 14 moves in the left-right direction. Therefore, the left and right positions can be adjusted by moving the main bracket 14 smoothly in the left and right direction.
Next, after adjusting the left and right positions, the two bolts 15B are tightened to fix the mounting portion 15 to the mounting groove 13A. Then, the bolt 28 and the nut 29 are tightened to fix the support block 24 to the sley 13.

The main nozzle device 10 of the air jet loom according to the first embodiment has the following effects.
(1) A guide groove 27 formed on the front surface 12A of the nozzle holding portion 12 and the front surface of the sley 13 between the nozzle holding portion 12 and the sley 13 holding the base end portion of the main nozzle 11 (11A to 11H). And the large and large nozzle holding part 12 can be fixed to the sley 13 from the front and rear by the main bracket 14 and the auxiliary bracket 22. It is possible to suppress vibration in the moving direction. Therefore, it is possible to suppress the vibration of the main nozzle 11 held by the nozzle holding unit 12.
(2) Since the main body portion 22B of the auxiliary bracket 22 is arranged so that the plate thickness direction coincides with the left-right direction, the rigidity with respect to the force acting in the swinging direction can be increased. Can be more firmly fixed so as not to vibrate.
(3) Since the attachment position of the auxiliary bracket 22 to the nozzle holding portion 12 is the front surface 12A of the nozzle holding portion 12, the attachment work of the auxiliary bracket 22 to the nozzle holding portion 12 may be performed from the front side of the air jet loom. Easy to work.
(4) The bent portion 22A of the auxiliary bracket 22 is fixed to the front surface 12A of the nozzle holding portion 12, and the support block 24 that is integrally fixed to the auxiliary bracket 22 is positioned along the guide groove 27 formed on the front surface of the sley 13. Since the nozzle holder 12 and the auxiliary bracket 22 are not disconnected, the main bracket 14 can be smoothly moved in the left-right direction to adjust the left-right position.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS.
This embodiment is a case where an automatic weft processing device is added to the main nozzle device 10 of the air jet loom in the first embodiment, and other configurations are common.
Therefore, here, for convenience of explanation, some of the reference numerals used in the previous explanation are used in common, explanation of common configurations is omitted, and only the changed parts are explained.

  As shown in FIGS. 5 and 6, the main nozzle device 50 according to the second embodiment includes an automatic weft processing device that automatically processes a weft Y with poor weft insertion. A weft introduction duct 51 is installed above the front end side of the main nozzle 11 for weft insertion, and a weft insertion prevention nozzle 52 is installed below the front end side of the main nozzle 11 for weft insertion. An air guide 53 and a suction duct 54 are installed above the root side of the weft insertion main nozzle 11. From the right side to the left side, the weft introduction duct 51, the air guide 53, and the suction duct 54 are installed in this order. As shown in FIG. 5, a suction passage X is formed in the weft introduction duct 51, the air guide 53, and the suction duct.

The weft introduction duct 51 is formed with an introduction port 51A that opens toward the front end side of the main nozzle 11 and is disposed opposite to the injection port 52A of the weft insertion prevention nozzle 52 across the injection path of the main nozzle 11. A discharge port is formed at the left end of the weft introduction duct 51.
The weft introduction duct 51 is supported by a bracket 55 extending downward, and the bracket 55 is fixed to the attachment portion 15 of the main bracket 14 with a bolt 57 via a holding member 56.
The weft insertion prevention nozzle 52 is coupled to a rectangular support block 58, and the support block 58 is fixed to the guide groove 27 of the slay 13 by a bolt 59 and a nut 60 so as to be movable left and right.

A suction passage X is formed in the air guide 53 in the left-right direction. The air guide 53 is supported by a bracket 61 curved in a U shape, and the bracket 61 is coupled to a support block 62 by two bolts 63. The support block 62 is fixed to the guide groove 27 of the sley 13 by bolts 59 and nuts 60 so as to be movable left and right.
A roller gripping mechanism (not shown) is provided between the weft introduction duct 51 and the air guide 53. The roller gripping mechanism refers to a mechanism for pulling and removing the weft Y having poor weft insertion from the front of the weave.

A suction passage X is formed in the suction duct 54 in the left-right direction. The left outlet side of the suction duct 54 is connected to the dust box via a pipe pipe (not shown).
The suction duct 54 is supported by a suction duct bracket 64 whose side surface shape is curved in a U shape. The suction duct bracket 64 is arranged so that the thickness direction of the suction duct bracket 64 coincides with the left-right direction. The suction duct bracket 64 is connected to the support block 65 by two bolts 63. The support block 65 is fixed to the guide groove 27 of the sley 13 by two bolts 59 and a nut 60 so as to be movable left and right.

The automatic weft processing apparatus includes a weft introduction duct 51, an air guide 53, a suction duct 54, a weft insertion prevention nozzle 52, a roller gripping mechanism, and the like, and is controlled by a control device (not shown).
When a weft insertion failure occurs, the defective weft Y is guided to the weft introduction duct 51 by the injection action of the weft insertion prevention nozzle 52, and the suction passage X of the air guide 53 and the suction duct 54.
And is collected in a dust box (not shown). A description of the detailed operation is omitted.

  A connecting member 66 that connects the suction duct bracket 64 and the nozzle holding portion 12 is attached to the front portion of the suction duct bracket 64. The connecting member 66 has a shape bent in an L shape. One part of the connecting member 66 is fixed to the suction duct bracket 64 with a bolt 67. A long hole 69 having a predetermined length in the left-right direction is formed in the other part of the connecting member 66. The other part of the connecting member 66 is fixed to the front surface 12 </ b> A of the nozzle holding part 12 by a bolt 68 inserted through the long hole 69.

Thus, in the main nozzle device 50 in the second embodiment, the suction duct bracket 64 that fixes the suction duct 54 in the weft automatic processing device to the slay 13 can be used as an auxiliary bracket. By providing the connecting member 66 for connecting the suction duct bracket 64 and the nozzle holding portion 12, the nozzle holding portion 12 can be fixed to the slay 13 in cooperation with the main bracket 14. It is possible to suppress vibration in the moving direction. In particular, since the suction duct bracket 64 is arranged so that the plate thickness direction of the suction duct bracket 64 coincides with the left-right direction, the rigidity of the suction duct bracket 64 against the force acting in the swinging direction can be increased. 12 can be more firmly fixed so as not to vibrate.
Further, since the suction duct bracket 64 for fixing the suction duct 54 to the slay 13 in the automatic weft processing apparatus can be used as an auxiliary bracket, the apparatus can be simplified compared with the case where an auxiliary bracket is newly provided. Is possible.
Further, a long hole 69 is formed in the other part of the connecting member 66 that connects the suction duct bracket 64 and the nozzle holding portion 12, so that the suction duct bracket 64 is connected to the slay 13 via the support block 65. Even if it is fixed, it is possible to adjust the left and right positions by moving the main bracket 14 in the left and right direction.

The present invention is not limited to the configuration of each of the embodiments described above, and various modifications are possible within the scope of the gist of the present invention, and can be implemented as follows .
In the first embodiment, it has been described that the auxiliary bracket 22 is movable left and right along the guide groove 27 formed on the front surface of the sley 13. However, the auxiliary bracket 22 is fixed to the front side of the sley 13. It is possible that the side of the auxiliary bracket 22 to be attached to the nozzle holding portion 12 (the bent portion 22A) is formed with a long hole so as to be movable left and right. In this case, the auxiliary bracket 22 may be fixed at a place other than the guide groove 27.
In the first and second embodiments, eight main nozzles (eight colors) have been described. However, two or more main nozzles are applicable.

10, 50 Main nozzle device 11 (11A to 11H) Main nozzle 12 Nozzle holding portion 12A Front surface 13 Slay 13A Mounting groove 14 Main bracket 15 Mounting portion 15A Long hole 22 Auxiliary bracket 24 Support block 27 Guide groove 54 Suction duct 64 Suction duct bracket 65 Support block 66 Connecting member 69 Long hole Y Weft

Claims (4)

A plurality of main nozzles for weft insertion, and a main bracket having a nozzle holding portion for holding the base end portion of the main nozzle and fixed to a mounting groove formed on the rear side of the sley, A main nozzle device of an air jet loom that swings integrally with the sley as it moves,
An air jet comprising: an auxiliary bracket that connects a front surface of the nozzle holding portion and a front side of the slay and that suppresses vibration in a swinging direction of the nozzle holding portion in cooperation with the main bracket. The main nozzle device of the loom. The auxiliary bracket includes a bent portion that is bent at an end portion and attached to the front surface of the nozzle holding portion, and a main body portion that has a portion on the front side of the bent portion and whose plate thickness direction matches the left-right direction. The main nozzle device for an air jet loom according to claim 1. The air according to any one of claims 1 and 2, wherein the auxiliary bracket is movable along a guide groove formed in a left-right direction of the air jet loom on a front side of the sley. The main nozzle device for jet looms. The air jet loom includes a weft automatic processing device that automatically processes a weft having a poor weft insertion, and the auxiliary bracket is a suction duct bracket that supports a suction duct of the automatic weft processing device, and the suction duct bracket And a connecting member that is fixed to the front side of the sley and that connects the suction duct bracket and the nozzle holding portion to the suction duct bracket so that the nozzle holding portion can move in the left-right direction of the air jet loom. The main nozzle device of the air jet loom according to any one of claims 1 to 3, wherein the main nozzle device is provided.

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