JP2011127233A - Weft insertion device of air jet type loom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weft insertion device which does not cause the excessive deflection and breakage of a pressure conduit for supplying pressurized air to a main nozzle. <P>SOLUTION: In the weft insertion device of air jet type loom including a main nozzle 11 for weft insertion disposed at an attaching position in a state capable of being moved in the weaving width direction, and a pressurized air-supplying device 14 supported on the frame of the loom to support the pressurized air to the main nozzle 11, the supply device 14 includes a shut-off valve 15 for controlling the passage of the pressurized air to the main nozzle 11, a pipe joint exhaust port 35 attached to the exhaust port 17 of the shut-off valve 15, and a flexible pressure conduit 36 for communicating the exhaust port 35 of the pipe joint with the main nozzle 11. Also, the supply device 14 is equipped with a rotation mechanism 18 for rotation-moving the exhaust port 35. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a weft insertion device used in an air jet loom.

  A weft insertion device for an air jet loom includes a pressure air supply device that supplies pressure air to a main nozzle that performs weft insertion. The pressure air supply device has an on-off valve that controls the supply of pressure air to the main nozzle, and the on-off valve and the main nozzle are connected by a pressure conduit.

  The on-off valve is fixed to a fixed position, for example, the yarn supply side frame of the loom, while the main nozzle is fixed to the swinging lead holder and swings with the reed. A nylon tube having a length that allows the lead holder to swing is adopted.

  For example, in the weft insertion device of the air jet loom of Patent Document 1, the open / close valve of the pressure air supply device is fixedly arranged so as to surround the main nozzle, and each open / close valve and the main nozzle are flexible pressure conduits. In order to realize highly responsive air injection, the pipelines of the respective pressure conduits are made to be almost the same as the shortest path.

  By the way, some air jet looms can move and adjust the attachment position of the main nozzle in the weaving width direction in accordance with the change in the weaving width of the weaving cloth.

  Depending on the loom, the position in the weaving width direction that changes the weaving width of the woven fabric varies depending on the loom. For example, the weaving width is changed according to the so-called “center reference”.

  For example, in jacquard looms that require a left-right balance of threading and twin-beam type looms that require a left-right balance of warping beam and warp tension, the above-mentioned “center standard” is adopted, and weaving of woven fabrics to be woven is performed. The mounting position of the main nozzle is adjusted in the weaving width direction based on the center in accordance with the width.

  Now, in the air jet loom that can move and adjust the mounting position of the main nozzle in the weaving width direction, the pressure conduit connecting the on-off valve and the main nozzle allows the swing of the reed holder, as well as the weaving width direction. Since it is necessary to allow the movement of the main nozzle to the tube, a tube having a relatively long tube length is employed.

  However, when such a long pressure conduit is adopted, if the distance between the main nozzle and the on-off valve becomes shorter due to the movement adjustment of the main nozzle toward the on-off valve in the weaving width direction, the distance depends on the distance. As a result, the amount of deflection of the pressure conduit communicating with the main nozzle and the on-off valve increases.

  When the deflection amount of the pressure conduit increases, the swing width of the pressure conduit due to the swing of the lead holder increases accordingly. As a result, interference between the pressure conduit and peripheral devices occurs, which promotes wear and breakage of the pressure conduit.

  In addition, when the distance between the main nozzle and the on-off valve is shortened, the pressure conduit between the main nozzle and the on-off valve is forcibly bent beyond the minimum bending radius, causing pipe breakage, and supply of pressurized air to the main nozzle. Is disturbed.

  Therefore, the mounting position of the on-off valve can be adjusted in the weaving width direction, and the on-off valve mounting position is adjusted in accordance with the movement adjustment of the main nozzle, so that the main nozzle can be adjusted in the weaving width direction without using a long pressure conduit. It is also possible to cope with the movement adjustment.

  However, even if the on-off valve can be moved and adjusted in the weaving width direction, there are various peripheral devices (for example, ear opening devices) on the movement path, so the adjustment range of the on-off valve mounting position is limited. May end up. In that case, since the adjustment range of the mounting position of the on-off valve becomes smaller with respect to the movement amount of the main nozzle in the weaving width direction, a long pressure conduit has to be adopted after all.

  In particular, in the weft insertion device in which the open / close valves of the pressurized air supply device are arranged so as to surround the main nozzle as in the technique of Patent Document 1, the occupied space of the open / close valve is large, so the adjustment range of the mounting position of the open / close valve is large. Will be restricted.

JP 11-315447 A

  Therefore, in view of the problem of the background art, an object of the present invention is to provide an air jet loom capable of moving and adjusting the main nozzle in the weaving width direction according to the change in the weaving width as described above. It is an object of the present invention to provide a weft insertion device that does not cause excessive deflection or pipe breakage of a pressure conduit even when moved.

  Based on the above-mentioned problems, the present invention has a weft insertion device for an air jet loom as follows.

  That is, the weft insertion device for an air jet loom according to the present invention includes a main nozzle (11) for weft insertion provided so that the attachment position can be adjusted in the weaving width direction, and the main nozzle supported by the frame of the loom. A pressure air supply device (14) for supplying pressure air to (11). The supply device (14) includes an on-off valve (15) for controlling the passage of pressurized air to the main nozzle (11), and an exhaust port of a pipe joint attached to an exhaust port (17) of the on-off valve (15). (35) and a flexible pressure conduit (36) communicating the exhaust port (35) of the pipe joint and the main nozzle (11). The supply device (14) includes a rotation mechanism (18) for rotating the exhaust port (35).

  The "pressure air supply device (14)" here refers to an on-off valve (15), a pressure conduit (36), accessories such as an on-off valve, for example, pipe joints (33a, 33b), and a series of these. Up to a member that supports this member. The on-off valve (15) is, for example, an electromagnetic valve, and the pressure conduit (36) is, for example, a nylon tube.

  Further, the rotation mechanism (18) is a support member that supports the on-off valve (15) on the frame of the loom, and supports the on-off valve (15) so as to be rotatable about a rotation axis. You may comprise as what is provided.

  The supply device (14) includes two or more on-off valves (15), and the rotation mechanism (18) is a common holding member that supports the two or more on-off valves (15). The holding member (19) supported by the support member (25) so as to be rotatable around the rotation axis may be provided.

  The rotation axis of the rotation mechanism (18) may be set in a substantially vertical direction. The substantially vertical direction is a concept including a vertical direction and an inclination direction in which the rotation mechanism does not rotate freely due to gravity when the rotation mechanism is in a free state.

  In the weft insertion device of the air jet loom, the supply device includes a rotation mechanism that rotates and moves the exhaust port, and the exhaust port can be rotated by the rotation mechanism to change the position of the exhaust port. Then, when the mounting position of the main nozzle is adjusted in the weaving width direction, the position of the end of the pressure conduit on the on-off valve side and the extending direction are changed by rotating the position of the exhaust port to change the pressure conduit. The handling of can be changed.

  For this reason, the weft insertion device of the present invention does not cause interference between the pressure conduit and the peripheral device when the main nozzle is moved and adjusted in the weaving width direction along with the change of the weaving width, and the pressure conduit is excessive. It is possible to prevent bending and pipe breakage, and it is possible to cope with movement adjustment of the main nozzle.

  The rotation mechanism includes a support member that supports the open / close valve on a frame of the loom and supports the open / close valve so as to be rotatable about a rotation axis, so that the exhaust port of the pipe joint of the exhaust port is connected to the rotation axis. The rotational distance of the exhaust port in the rotational direction can be further increased, and the main nozzle can be adapted to a greater movement adjustment in the weaving width direction. .

  In addition, since the on-off valve is rotated around the axis of rotation and the pressure conduit is wound up or sent out around the axis of rotation, the pressure on the on-off valve can be reduced without occupying space compared to the linear movement of the on-off valve in the weaving width direction. Excessive slack or tension of the conduit can be eliminated.

  Furthermore, the supply device includes two or more on-off valves, and the rotation mechanism is a common holding member that supports the two or more on-off valves, and is supported by the support member so as to be rotatable about a rotation axis. Since the holding member is provided, two or more on-off valves, that is, two or more exhaust ports, can be simultaneously rotated around a common rotation axis in a single operation in response to movement adjustment of the main nozzle in the weaving width direction. And adjustment work becomes easy.

  The rotation mechanism has its rotation axis arranged substantially in the vertical direction. Therefore, when rotating the exhaust port corresponding to the movement adjustment of the main nozzle in the weaving width direction, regardless of the position of the center of gravity of the rotation mechanism. , (Even if the fastening of the screw member of the rotating mechanism is loosened), the rotating mechanism is not rotated by gravity, and the adjustment work is facilitated.

It is a front view of the weft insertion apparatus of the air injection type loom in one Example of this invention. It is a top view of the weft insertion apparatus of the air injection type loom in one Example of this invention. It is a left view of the weft insertion apparatus of the air injection type loom in one Example of this invention. It is a top view which shows the weft insertion apparatus of this invention, (a) is the state in which the main nozzle was attached to the position corresponding to the narrowest weaving width, (b) is the position in which the main nozzle corresponds to the widest weaving width. Each attached state is shown. It is a top view which shows the weft insertion apparatus in the other Example of this invention, (a) is the state in which the main nozzle was attached to the position corresponding to the narrowest weaving width, (b) is the main nozzle located in a little outer side. The state (c) to perform shows the state in which the main nozzle is attached at a position corresponding to the widest weaving width. It is a top view which shows the weft insertion apparatus in the further another Example of this invention, (a) is the state in which the main nozzle was attached to the position corresponding to the narrowest weaving width, (b) is the weaving with the widest main nozzle. The state attached to the position corresponding to the width | variety is each shown.

  With reference to FIGS. 1-3, one Example of the weft insertion apparatus 8 of the air injection type loom of this invention is described. In the illustrated example, the weft insertion device 8 of the present application is applied to the air jet loom 1 having two weft insertion series. Each drawing shows a portion where the weft insertion device 8 is installed among the portions constituting the air jet loom 1, that is, the peripheral portion of the left frame 43. The weft insertion device 8 includes two main nozzles 11 and two solenoid valves (open / close valves) 15 corresponding to two weft insertion series. Hereinafter, the weft inserting device 8 of the air jet loom of the present invention will be described in detail.

  The illustrated air jet loom 1 includes a left frame 43, a right frame (not illustrated), and a beam (not illustrated) connecting the left and right frames as a main frame. Each of the left frame 43 and the right frame (not shown) is provided with a side stand 44 that protrudes upward, and a stay 49 that extends in the weaving width direction is provided above the left and right side stands 44. Each of the pair of left and right side stands 44 is provided with a collar frame guide 51 for guiding the plurality of collar frames 50 in the vertical direction.

  The weft inserting device 8 that inserts the weft 41 into a warp opening (not shown) includes two weft insertion lines. Each of the weft insertion series has, as main components, a main nozzle 11 for jetting the weft 41 together with the pressure air from the tip 47, a pressure air supply device 14 for supplying pressure air for weft insertion to the main nozzle 11, It has a nylon tube 36 as a pressure conduit that connects the pressurized air supply device 14 and the main nozzle 11, and an auxiliary main nozzle 10 that feeds the weft 41 stored in a weft storage device (not shown) to the main nozzle 11. Yes.

  Each main nozzle 11 is attached to the lead holder 2 which is one of the members constituting the hammering device 46 via the nozzle holder 5 so as to be movable and adjustable in the weaving width direction. Each main nozzle 11 is fixed to a common nozzle holder 5. 1 to 3 show a state in which the main nozzle 11 is attached to a position corresponding to the narrowest weaving width on the lead holder 2.

  As shown in FIG. 3, the lead holder 2 is a member extending in the weaving width direction, holds the reed (lead) 3, and is supported by a rocking shaft (not shown) via a sled sword 52 that swings in the front-rear direction of the loom. Has been. A rocking shaft (not shown) causes the sled sword 52 to swing in the front-rear direction of the loom, so that the hook 3 held by the lead holder 2 also swings in the front-rear direction of the loom. The lead holder 2 has an attachment groove 4 that opens upward and extends in the weaving width direction. A part of the nozzle holder 5 to which the main nozzle 11 is fixed and a wedge-shaped block 48 are fitted in the mounting groove 4. The nozzle holder 5 is clamped between the mounting groove 4 and the wedge-shaped block 48 by tightening a screw member (bolt) 6 that passes through the wedge-shaped block 48 from above and is screwed into the mounting groove 4. On the other hand, it is firmly fixed. Thereby, the main nozzle 11 rocks | fluctuates in the front-back direction of a loom with the coffin 3. As shown in FIG. 1, a plurality of auxiliary nozzles 7 for assisting the flying of the weft 41 are attached to the lead holder 2 in the weaving width direction.

  When moving and adjusting the attachment position of the main nozzle 11 in the weaving width direction, the screw member 6 is loosened, the nozzle holder 5 is slid along the attachment groove 4 of the lead holder 2, and the screw member 6 is retightened after positioning. .

  An introduction hole 12 for introducing the weft 41 into the nozzle is provided at the rear end of each main nozzle 11 on the side opposite to the weft insertion side. A weft 41 is introduced into the introduction hole 12 from a weft storage device (not shown) via the auxiliary main nozzle 10. Each main nozzle 11 is provided with a pipe joint 34 for introducing the pressure air into the main nozzle 11 through the nylon tube 36 from the pressure air introduction device 14.

  The pressure air supply device 14 is disposed on the side farther from the warp row than the main nozzle 11, and is supported by the rotation mechanism 18 so as to be rotatable around the rotation axis 37 with respect to the side stand 44 of the loom. A main component of the pressurized air supply device 14 is that each solenoid valve 15 as an on-off valve corresponding to each main nozzle 11, a holder 19 as a holding member to which each solenoid valve 15 is commonly attached, and a holder 19 A bracket 25 as a support member for supporting the bracket 19 and screw members 28 and 29 such as bolts for fixing the holder 19 and the bracket 25 to each other are provided. Among these, the holder 19, the bracket 25, and the screw members 28 and 29 constitute the rotation mechanism 18 of the present invention, and the center line of the screw members 28 and 29 corresponds to the rotation axis 37 of the rotation mechanism 18.

  The bracket 25 that supports the holder 19 is an L-shaped iron plate (sheet metal member) having a long piece portion and a short piece portion, and the short piece portion is formed above the side surface of the side stand 44 on the side away from the warp row. As a result, the long side portion of the bracket 25 extends from the side surface of the side stand 44 in a state where the plane is directed in the vertical direction, and the long side portion extends vertically. A long hole 22 that penetrates and is long in the weaving width direction is provided.

  The holder 19 to which each electromagnetic valve 15 is attached is a housing configured to bend an iron plate and have three surfaces orthogonal to each other. Of the three surfaces, a surface orthogonal to the rotation axis 37, that is, the upper surface 20. Is provided with a long hole 26 penetrating vertically for attaching the holder 19 to the bracket 25.

  In a state where the upper surface 20 of the holder 19 is overlapped with the lower surface of the long piece portion of the bracket 25, a screw member (bolt) 28 is inserted into the intersecting portion of the elongated hole 22 of the bracket 25 and the elongated hole 26 of the holder 19. By tightening with a (nut) 29, the holder 19 is attached to the bracket 25 so as to be adjustable around the weaving width direction, the warp direction and the rotation axis 37.

  In order to secure the holder 19 and the bracket 25, the spring washer 31 and the plain washer 30 between the screw member (bolt) 28 and the bracket 25, and between the holder 19 and the screw member (nut) 29, respectively. A washer 32 is attached.

  A mounting hole 23 for attaching each electromagnetic valve 15 passes through the side surface 21 of the two side surfaces of the holder 19, and each electromagnetic valve 15 is a screw inserted into the mounting hole 23 from the outside of the side surface 21. It is fixed to the inside of the side surface 21 by a member. Further, a pipe joint 33a is screwed into the exhaust port 17 of each solenoid valve 15, and the exhaust port of the pipe joint 33a opens to the side surface 21 side. The side surface 21 is provided with a hole 24 penetrating at a position corresponding to the exhaust port of the pipe joint 33a. Further, the pipe joint 33b is screwed into the exhaust port of the pipe joint 33a from the outside of the side surface 21. .

  One end of a nylon tube 36 is attached to the exhaust port 35 of each pipe joint 33b, and the other end of the nylon tube 36 is connected to the pipe joint 34 of the main nozzle 11 described above. The nylon tube 36 is moderately slackened so as not to be pulled even if the lead holder 2 swings in order to allow the main nozzle 11 to move in the weaving width direction. Each electromagnetic valve 15 is fixed to the holder 19 so as to be shifted from each other in the vertical direction so that the pipe joints 33b do not interfere with each other. A pressure conduit (not shown) leading to a pressure supply source (not shown) is connected to the pipe joint 13 of the air supply port 16 of each solenoid valve 15.

  In addition to the pipe joint 33b, an air path 53 and an air path 54 are connected to each pipe joint 33a, and the air path 53 and the air path 54 are not shown so that the pressurized air does not flow backward from the pipe joint 33a side. A check valve is provided. Therefore, the pressure air from each solenoid valve 15 is supplied only to the main nozzle 11 via the pipe joint 33a, the pipe joint 33b, the exhaust port 35, and the nylon tube 36. When the loom is continuously operating or stopped, air at a constant pressure for preventing thread dropout always passes from the air path 53 through the pipe joint 33a, the pipe joint 33b, the exhaust port 35, and the nylon tube 36. To the main nozzle 11. Further, when the weft 41 is cut by a yarn supply side cutter device (not shown), the repulsion of the weft 41 due to the cutting is reduced by jetting pressurized air, so that the weft 41 is prevented from coming off from the main nozzle 11. Is supplied from the air path 54 to the main nozzle 11 through the pipe joint 33a, the pipe joint 33b, the exhaust port 35, and the nylon tube 36.

  With the above configuration, the rotation mechanism 18 in the supply device 14 rotates the exhaust port 35 of the pipe joint 33b around the rotation axis 37 arranged in the vertical direction. The rotation axis 37 functions as a rotation axis 37 common to the exhaust port 35 of each pipe joint 33b.

  Next, the operation of the weft insertion device 8 of the present invention will be described by taking as an example the case where the weaving width is increased, that is, the case where the main nozzle 11 is moved and adjusted outside the weaving width. 4A, the nozzle holder 5 of the main nozzle 11 is fixed to the lead holder 2 at a position corresponding to the narrowest weaving width.

  With respect to the position of the nozzle holder 5 described above, the holder 19 of the supply device 14 is located between the air supply port of the pipe joint 34 of the main nozzle 11 and the exhaust port 35 of the pipe joint of the exhaust port 17 of the electromagnetic valve 15. At the position where the distance is shortest, the screw members 28 and 29 supporting the holder 19 are fastened to the bracket 25.

  Now, when enlarging the weaving width, first, the fastening of the screw members 28 and 29 fixing the holder 19 to the bracket 25 is loosened to make the holder 19 rotatable.

  Next, for the nozzle holder 5, the screw member 6 (see FIG. 3) of the wedge-shaped block 48 that fixes the nozzle holder 5 to the lead holder 2 is loosened, and the nozzle holder 5 is moved and adjusted along the mounting groove 4 of the lead holder 2. enable.

  Then, the nozzle holder 5 is moved and adjusted to the side away from the warp row in the weaving width direction, and the nozzle position is changed to the main nozzle position corresponding to the changed weaving width, and then the screw member 6 for the lead holder 2 is fastened again. 5 is fixed.

  At this time, the nozzle holder 5 is attached to the air supply port of the pipe joint 34 of the main nozzle 11 and the exhaust port 17 of the solenoid valve 15 in accordance with the movement adjustment to the side away from the warp row, that is, the side closer to the solenoid valve 15. The distance between the pipe joints 33a and 33b and the exhaust port 35 is shortened, and the nylon tube 36 communicating with the pipe joints 33a and 33b becomes long and is greatly bent.

  Therefore, the holder 19 of the supply device 14 is rotated around the axis of the screw members 28 and 29 in the clockwise direction of FIG. Absorb length.

  Furthermore, after rotating the holder 19 and slackening the nylon tube 36 to the extent that the swing of the lead holder 2 can be allowed, the screw members 28 and 29 supporting the holder 19 are fastened again to fix the holder. .

  As described above, in the example illustrated in FIGS. 1 to 4, when the main nozzle 11 is moved and adjusted in accordance with the change in the weaving width, the supply device 14 is rotated by the rotation mechanism 18 according to the movement adjustment of the main nozzle 11. In addition, by rotating the position of the exhaust port 35, the position of the end of the nylon tube 36 as the pressure conduit on the on-off valve side and the extending direction can be changed, and the handling of the nylon tube 36 can be changed. For this reason, when the main nozzle 11 is moved and adjusted in the weaving width direction, it is not necessary to change the nylon tube 36 to one having a different length, and the nylon tube 36 even if the main nozzle 11 swings with the lead holder 2. And the peripheral device do not occur, and the nylon tube 36 is not excessively bent or broken.

  In the example shown in FIGS. 1 to 4, the bracket 25 of the rotation mechanism 18 is attached to the side stand 44, and the pressurized air supply device 14 is located above the frame 43 of the loom and is connected to the main nozzle 11 in the weaving width direction. Although arranged outside the adjustment range, the attachment position of the supply device 14 is not limited to the position shown in FIGS.

  For example, as shown in FIGS. 5 and 6, the bracket 25 constituting the rotation mechanism 18 is attached to the frame 43 and the pressure air supply device 14 is arranged on the main nozzle side (= warp row side) from the frame 43. Also good. That is, the supply device 14 may be within the adjustment range of the main nozzle 11 in the weaving width direction as long as it does not interfere with the peripheral device.

  In the example shown in FIGS. 1 to 4, the rotation mechanism 18 is configured to rotate around the rotation axis 37 in the vertical direction. However, the rotation mechanism 18 is not limited thereto, and rotates around the rotation axis in an arbitrary direction. You may comprise. For example, as in the example shown in FIG. 5, the rotation axis 37 of the screw members 28 and 29 constituting the rotation mechanism 18 is parallel to the weaving width direction, and the supply device 14 is rotated about the rotation axis 37 in the weaving width direction. Although not shown, the supply device 14 may be configured to rotate around the rotational axis in the warp direction.

  In the embodiment described above, both the holes formed in the holder 19 and the bracket 25 and into which the screw member 28 serving as the rotation shaft of the rotation mechanism 18 is inserted are long holes. At least one of the holes may be a long hole and may be translated along one of the long holes in addition to the rotation, or any of them may simply be rotated as a round hole but not parallel.

  In the embodiment described above, the two electromagnetic valves 15 are fixed to the holder 19, but the number of electromagnetic valves may be one, or a plurality of electromagnetic valves are fixedly arranged in separate holders. You may make it rotate with a separate rotation mechanism. Moreover, you may provide a holder as a member integral with a solenoid valve. Moreover, it may replace with the screw members 28 and 29, and may provide a rotating shaft as a member integral with a holder or a solenoid valve.

  In the embodiment, the holder 19 is rotated and the nylon tube 36 is wound around the holder 19. However, only the pipe joint 33b may be rotated to rotate the exhaust port 35 of the pipe joint. However, in order to absorb the surplus portion of the nylon tube 36 in a compact manner, it is advantageous to rotate the holder 19 and wind the nylon tube 36 around the holder 19.

1 Air jet loom 2 Lead holder 3 筬 4 Mounting groove 5 Nozzle holder 6 Screw member (bolt)
7 Auxiliary nozzle 8 Weft insertion device 9 Weft insertion series 10 Auxiliary main nozzle 11 Main nozzle 12 Introduction hole 13 Fitting 14 Pressure air supply device 15 Electromagnetic valve (open / close valve)
16 Air supply port 17 Exhaust port 18 Rotating mechanism 19 Holder (holding member)
20 upper surface 21 side surface 22 oblong hole 23 mounting hole 24 hole 25 bracket (supporting member)
26 Long hole 27 Hole 28 Screw member (bolt)
29 Screw member (nut)
30 Plain washer 31 Spring washer 32 Washer 33a Pipe joint 33b Pipe joint 34 Pipe joint 35 Pipe joint exhaust port 36 Nylon tube (pressure conduit)
37 Rotating axis 38 Weaving width direction 39 Warp row side 40 Side away from warp row 41 Weft 42 Woven fabric 43 Frame 44 Side stand 45 Winding beam 46 Striking device 47 Tip 48 Wedge block 49 Stay 50 Saddle frame 51 Saddle frame guide 52 Slate Sword 53 Air Path for Normal Injection 54 Air Path for Cutting

Claims (4)

A main nozzle (11) for weft insertion provided so that the mounting position can be adjusted in the weaving width direction;
A pressure air supply device (14) which is supported by a frame of a loom and supplies pressure air to the main nozzle (11), and an on-off valve (15) which controls passage of the pressure air to the main nozzle (11); An exhaust port (35) of a pipe joint attached to the exhaust port (17) of the on-off valve (15), and a flexible pressure conduit for communicating the exhaust port (35) with the main nozzle (11) ( 36) and a feeding device (14) comprising:
In a weft insertion device (8) of an air jet loom equipped with
The weft insertion device (8) for an air-jet loom, wherein the supply device (14) includes a rotation mechanism (18) that rotates and moves the exhaust port (35).   The rotation mechanism (18) includes a support member (25) that supports the open / close valve (15) on a frame of a loom and supports the open / close valve (15) so as to be rotatable about a rotation axis. The weft insertion device (8) for an air jet loom according to claim 1, characterized in that   The supply device (14) includes two or more on-off valves (15), and the rotating mechanism (18) is a common holding member that supports the two or more on-off valves (15). The weft insertion device (8) for an air-jet loom according to claim 2, further comprising a holding member (19) supported so as to be rotatable about a rotation axis by 25).   The weft insertion device (8) for an air-jet loom according to claim 3, wherein the rotation mechanism (18) has a rotation axis arranged substantially in the vertical direction.

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