JPH08218250A - Device for sending weft - Google Patents

Abstract

PURPOSE: To provide a device for sending weft for a fluid jetting weaving machine, capable of preventing end breakage of weft and reducing loss of weft. CONSTITUTION: This device for sending weft is equipped with a ring-shaped material 15 which is installed between a waft feeding material 7 stored with weft 3 and a nozzle 8, is wound with the weft 3, revolved by a rotator 14 held on a driving member 12 and driven, a supporting member 40 which is provided with a first gas route 41 and a second gas route 42 for connecting a high- pressure air supplying means 43 and a connecting and separating means S for the ring-shaped material 15 and the rotator 14 and a control means 30 for regulating a thread handling unit 10 having a vacuum generating means for making the first and the second routes under negative pressure and the high-pressure air supplying means 43.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft-feeding device for a fluid-jet loom, and more particularly to driving an annular body, which is provided between a weft-feeding section and a yarn-feeding nozzle, and around which a weft is wound, by air pressure. The present invention relates to a weft feeding device for controlling the weft.

[0002]

2. Description of the Related Art Conventionally, there are a water jet loom and an air jet loom as a fluid jet loom. These loom have a heald frame for opening warp threads and driving a weft thread into the openings to sew a cloth. Is woven. Then, every time one or a plurality of wefts are fed by the weft delivery device to the opening of the warp by a predetermined length, the weft is cut by a cutter at a predetermined position.

In the weft delivery device of these fluid jet loom, the weft is wound from a bobbin of the weft supply mechanism around a drum having a tapered peripheral surface for a predetermined length, and the fluid is jetted from a nozzle to open the warp. What to send to the department,
A weft-feeding device has been proposed in which a weft yarn from a bobbin of a weft-feeding mechanism is sandwiched between a driving roller and a driven roller and is fed out by a rotational force of the driving roller, and is fed to the opening of the warp by a fluid from a nozzle.

[0004]

Among the above-mentioned weft-feeding devices, the former device sends the weft wound on the drum to the opening of the warp by the fluid from the nozzle, so that a large tension is applied to the weft. Therefore, there is a problem that the weft yarn may be broken and the load on the nozzle is increased and the fluid pressure needs to be increased, resulting in an increase in running cost due to an increase in energy consumption.

In the latter weft feeding device, the weft is sandwiched between the driving roller and the driven roller and is fed to the nozzle by the rotational force of the driving roller. However, means for applying tension to the weft and means for stopping the fed weft Therefore, there is a problem in that the lengths of the wefts fed to the openings of the warps become uneven, and the loss of the wefts increases.

[0006]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a weft yarn which is provided between a weft supply portion in which a weft yarn is accommodated and a nozzle and which is driven by being wound around a rotating body supported by a driving member. And a contacting / separating means for contacting / separating the rotating body and the annular body with each other. The contacting / separating means supplies the high pressure gas supplied from the high pressure air supply means to the rotating body. A support body having a first gas passage for guiding in a direction of contact with the rotor and a second gas passage for guiding the annular body in a direction of separating from the rotating body, and in particular, supply of high-pressure gas from the first gas passage. It is an object of the present invention to provide a weft-feeding device provided with a vacuum generating device which sometimes makes the second gas passage negative pressure and supplies negative pressure to the first gas passage when the high pressure gas is supplied from the second gas passage.

[0007]

According to the present invention, when the contacting / separating means composed of the high-pressure gas supplying means is operated, the rotating body supported by the driving member and the annular body driven by being wound between the supporting members are intermittently connected to the rotating body. The weft yarns that are brought into contact with and separated from each other and are wound around the annular body are intermittently supplied to the nozzle.
When the high-pressure gas is supplied to the gas passage, the annular body is pressed against the rotating body. At this time, a negative pressure is generated in the second gas passage by the vacuum generator, and the annular body is more closely pressed against the rotating body. To be done. On the other hand, when the high-pressure gas is supplied to the second gas passage, the annular body separates from the rotating body, but at the same time, a negative pressure is generated in the first gas passage by the vacuum generator, and the annular body surrounds the support member. It is attracted to the surface and further promotes the separation between the annular body and the rotating body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 indicates an air jet loom (hereinafter, referred to as “loom”) which is one of fluid jet loom.
The weaving machine 1 sends a weft 3 to the opening of a warp 2 opened by a heald frame (not shown) by a weft sending device 4 of the present invention and a fluid consisting of an air flow, and strikes the weft 3 with a reed 5 to cloth 6 Weaving

Each time the weft 3 is fed by the weft delivery device 4 to the opening of the warp 2 by a predetermined length,
The weft 3 is cut at a predetermined position by a cutting means such as a cutter. The operation of the loom 1 is performed in synchronization with the rotation of a main shaft (not shown). The weft delivery device 4 includes a tensioner 9, a gripper 11, and a yarn path unit 10 that delivers the weft 3 in the weft 3 delivery direction indicated by the arrow A between the main nozzle 8 and the weft supply portion 7 that is configured by a bobbin. They are arranged sequentially. The weft yarn 3 from the weft yarn supplying portion 7 passes through the tensioner 9 and the gripper 11 and is tightly wound around the yarn path unit 10 at least once and is passed through to the main nozzle 8.

As the tensioner 9, there is used a reverse injection nozzle for injecting air from an air supply source (not shown) connected via a valve 22 in a direction opposite to the weft delivery direction indicated by an arrow A to apply tension to the weft 3. The air jetted from this nozzle is controlled by the valve 22. The main nozzle 8 is provided substantially horizontally with the tensioner 9 in order to feed the weft yarn 3 from the weft feeder 7 vertically to the warp yarn 2, and the air supplied from the air supply source (not shown) to the main nozzle 8 is It is controlled by the main valve 23. Main nozzle 8
Is constantly supplied with a small amount of air from an air supply source through a side passage (not shown) provided in parallel with the main valve 23 so as not to send out the weft yarn 3 at all, and the looseness of the weft yarn 3 is removed by this air. Has been done. Air is supplied to the sub nozzles 24 and 25 from an air supply source (not shown), and the air is controlled by the sub valves 26 and 27. The manual switch 28 is a manual switch for closing the gripper 11. On the arrival side of the tip portion 3b of the weft thread 3 and in the vicinity of the reed 5, the tip portion 3b of the weft thread 3 to be fed out.
A sensor 29 for detecting the

The gripper 11 is configured to be opened and closed in the direction of arrow B by being driven by a drive unit 21,
The weft yarn 3 is held in the closed state. The drive unit 21 is connected to a control device 30 as a control unit, and has a support 40 and a second gas passage 42, which will be described later.
High-pressure gas is supplied to the gripper 11 when the belt 15 is separated from the rotating body 14 by the high-pressure air supply means 43.
Is controlled to close.

As shown in FIG. 3, the yarn path unit 10 is
Pin 13, drive pulley 14 and belt 1 with circumferential grooves
5 and a substantially oval support 40, the drive pulley 14 is supported and fixed to the output shaft 12a of the motor,
It is arranged in a recess 40a formed in the substantially oval support 40 so that a part of its outer peripheral surface projects from the recess 40a. A belt 15 is attached to the drive pulley 14 and the support 40.
Is wrapped around gently.

The support 40 has a first gas passage 41 and a second gas passage 42 which are connected to the high pressure air supply means 43 inside.
Are formed respectively, and the second gas passage 42 is provided inside the side plate of the support body 40, and its end portion is open toward the contact portion between the drive pulley 14 and the belt. The first gas passage 41 guides high-pressure air supplied from the high-pressure air supply means 43 in a direction in which the belt 15 and the drive pulley 14 are brought into contact with each other, and is provided on the half surface 40A of the support 40 facing the recess 40a. Has been. The first gas passage 41 includes a circumferential curved surface 40b on the half surface 40A side of the support body 40.
Following the above, the planar shape is formed in an arc shape. The first gas passage 41 communicates with an air inlet 41a that receives air from the high-pressure air supply means 43 and an air outlet 41b that discharges high-pressure air between the belt 15 and the circumferential curved surface 40b. . The air inlet 41a is a side surface 40d of the support 40.
The air outlet 41b is provided in the
A plurality of them are arranged at 0b and opened.

The second gas passage 42 is provided with the high pressure air supply means 4
3, which guides high-pressure air supplied from No. 3 in a direction in which the drive pulley 14 and the belt 15 are separated from each other.
As shown in FIGS. 3A and 3B, they are arranged on both sides of the recess 40a. The second gas passage 42 has a substantially C shape, and is communicated with air inlets 42a formed at two positions on the side surface 40d. Both second gas passages 4
An air outlet 42b for discharging high-pressure air is communicated between the drive pulley 14 and the belt 15 at 2. A plurality of the air outlets 42b are arranged on the circumferential curved surface 40c of the support 40 located on the opening side of the recess 40a and are obliquely opened.
On the belt 15, the weft 3 whose direction is changed by the pin 13 is wound. In this embodiment, the air outlet 41
Although b and 42b are composed of a plurality of holes, the circumferential curved surface 40
It may be a slit-shaped opening extending in the longitudinal direction of b and 40c.

The high-pressure air supply means 43 is placed under the control of the controller 30, the drive pulley 14 is rotated by the drive of the motor 12, and the weft 3 is fed in the weft feed direction (arrow A). When high pressure air is supplied to the air inlet 41a and the weft yarn 3 is not sent out, that is, the loom 1
When the engine is idling or abnormal, high pressure air is supplied to the air inlet 42a. Therefore, in the present embodiment, the high pressure air supply means 43 and the support 40 constitute the contacting / separating means S.

According to this structure, when the weft 3 is fed to the warp opening 2a shown in FIG. 1, that is, when the weft is fed, the drive pulley 12 is rotated clockwise by the rotation of the drive shaft 12a. , High-pressure air is supplied to the air inlet 41a. Then, as shown in FIG. 3A, the supplied high-pressure air is simultaneously jetted from the air outlet 41b through the first gas passage 41 to the inner peripheral surface of the belt 15 located on the peripheral curved surface 40b side. . The belt 15 is pushed upward in FIG. 3 (a) by the injection pressure at this time, the belt 15 located on the circumferential curved surface 40c side is pulled and comes into pressure contact with the rotating drive pulley 14, and the rotation of the pulley 14 on the belt 15 is prevented. The weft thread 3 is sent out. Further, since an air layer is formed between the circumferential curved surface 40b and the belt 15 by the jetted air, friction between the belt 15 and the circumferential curved surface 40b that is being driven is removed.

On the other hand, when the loom 1 is in the idling state or when there is a failure, the control circuit 30 cuts off the supply of the high pressure air from the high pressure air supply means 43 to the air inlet 41a, and instead, the air inlet 42a. High pressure air is supplied to. Then, the supplied high pressure air is supplied to the second gas passage 4
2 from both air outlets 42b to drive pulley 14
Is sprayed all at once on the inner peripheral surface of the belt 15 which is in pressure contact with.
As shown in FIG. 3B, the injection pressure at this time causes the belt 15 to be pressed downward and separated from the drive pulley 14 so that the rotational force from the pulley 14 to the belt 15 is cut off. The delivery of the weft thread 3 that has leaned down stops. At this time, since the belt 15 is pressed downward, the circumferential curved surface 40
The belt 15 located on the b side will be pulled,
It is pressed against the circumferential curved surface 40b. At this time, the belt 1 that rotates due to inertia due to friction between the belt 15 and the circumferential curved surface 40b
Braking is applied to 5.

In this embodiment, the belt 15 and the peripheral curved surface 40b are provided.
The high pressure air is completely cut off to the air inlet 41a when the weft yarn 3 is not fed, that is, when the weft yarn 3 is not fed out. At this time, the high pressure air is not released so that the pressure contact between the circumferential curved surface 40b and the belt 15 is not released. May be supplied to the air inlet 41a. By doing this, the belt 1
The frictional heat generated by the friction between the No. 5 and the circumferential curved surface 40b can be cooled, and the durability of the belt 15 can be prevented from lowering due to the heat.

Next, FIG. 4 shows the pulley 14 and the support 40.
A vacuum generator is provided in each of the first and the second gas passages to have a negative pressure when the high-pressure gas is supplied to the first gas passage, and the first gas passage has a negative pressure when the high-pressure gas is supplied to the second gas passage. In the figure, the high-pressure gas inlet side of the first vacuum generator 46 is connected to the high-pressure air supply means 43, and the outlet side is connected to the first gas passage 41 via the first electromagnetic valve 48.
On the vacuum side, the second gas passage 42 is passed through the second electromagnetic valve 49.
Connected to

The high-pressure gas inlet side of the second vacuum generator 47 is connected to the high-pressure air supply means 43, and the outlet side is connected to the second gas passage 42 via the second electromagnetic valve 49. The vacuum side is connected to the first gas passage 41 via the first electromagnetic valve 48. The control circuit 30 has a first circuit as shown in FIG.
When the high-pressure gas is supplied from the high-pressure air supply means 43 to the gas passage 41, the high-pressure gas that has passed through the first vacuum generator 46 is guided to the first gas passage inlet 41a so that the first electromagnetic valve 48 is a valve. open. At this time, the valve of the second electromagnetic valve 49 is closed so that the negative pressure generated by the first vacuum generator 46 is guided to the second gas passage inlet 42a.

By this operation, the high-pressure gas is ejected to the side of the support, so that the belt 15 is pulled in the direction in which it comes into contact with the drive pulley 14 and, at the same time, the second gas passage 42 which is open to the contact between the drive pulley 14 and the belt 15. Due to the negative pressure generated at 1, the belt 15 is pulled toward the drive pulley 14 side, and the pressure contact force between the belt 15 and the drive pulley 14 further increases.

In FIG. 4B, is the second gas passage 42.
When the high pressure gas is supplied from the high pressure air supply means 43 to the second electromagnetic valve 4 such that the high pressure gas that has passed through the second vacuum generator 47 is guided to the second gas passage inlet 42a.
Open valve 9. At this time, the valve of the first electromagnetic valve 48 is closed so that the negative pressure generated by the second vacuum generator 47 is guided to the first gas passage inlet 41a.

By this operation. Since the high-pressure gas is ejected to the rotating body side via the second gas passage 42, the belt 15 is guided in the direction away from the drive pulley 14 and at the same time, the negative pressure generated in the first gas passage 41 opening to the support body side. As a result, the belt 15 is sucked toward the support 40, and the belt 1
5 and the drive pulley 14 are separated from each other. When these operations are repeated, the belt 15 is attracted to the pulley 14 by the negative pressure generated in the second gas passage when the belt 15 is pressed against the pulley 14, while the belt 15 is separated from the pulley 14 and is supported. When pressing against the body 40, the belt 15 is further attracted to the support 40 by the negative pressure generated in the first gas passage, the contacting / separating means S is configured, and the weft 3 is fed in the direction of arrow A. As described above, the contact and separation between the belt and the rotating body can be made more reliable not only by the positive pressure of the high-pressure air but also by the suction by the negative pressure. .

The operations of the loom 1 and the weft feed-out device 4 having the above-mentioned construction will be described. (Operation of the loom) The operator turns on the power of the loom 1, prepares for the operation of the loom 1 and waits for the operation of the loom 1 to start. When the loom 1 is not in operation, the operator operates the gripper 11 via the drive unit 21. I'm closing it. That is, the operator visually determines whether or not the weft 3 is passed from the weft feeder 7 to the main nozzle 8, and when the weft 3 is not passed from the weft feeder 7 to the main nozzle 8, The weft 3 is manually passed from the weft feeder 7 through the tensioner 9, the gripper 11 and the yarn path unit 10 to the main nozzle 8. In this case, the yarn path unit 10, that is, the pin 13 and the belt 1
The weft yarn 3 is wound around the yarn 5 in close contact with each other for at least one round.

In the state where the preparation for operation is completed in this way,
The weft thread 3 is passed from the weft thread feeder 7 to the main nozzle 8, the gripper 11 holds the weft thread 3, and the tensioner 9 applies back tension to the weft thread 3 to stop the weft thread 3. . Further, a small amount of air is supplied to the main nozzle 8 from an air supply source (not shown) via a side passage provided in parallel with the main valve 23, and tension is applied to the weft yarn 3 to remove the looseness of the weft yarn 3.

The control device 30 judges from a signal from the main body of the loom 1 whether or not the loom is to be operated. If the loom 1 is to be operated when the operation preparation of the present embodiment is completed, By controlling the respective parts in accordance with the rotation of the main shaft (not shown) in the same loom, the weft-feeding device 4 is operated to feed the weft 3 to the warp opening 2a at a predetermined weft-feeding time.

That is, the control device 30 opens the main valve 23 and injects air into the main nozzle 8 at the timing when the main shaft reaches about 90 °. At this time, the gripper 11
Is still open, so the tip of the weft thread 3 is the gripper 1
It extends horizontally from 1 to the main nozzle 8. (Operation of Weft Feeding Device) Next, the control device 30 causes the drive unit 2 to move at a timing when the main shaft reaches about 100 °.
1 is controlled to open the gripper 11, and the drive circuit 20 drives the motor 12 to rotate the drive pulley 14 in the clockwise direction. At this time, high-pressure gas is supplied from the high-pressure air supply means 43 to the first gas passage 41 of the support 40, and the drive pulley 14 and the belt 15 are placed in contact with each other as shown in FIG. The rotation of 14 is transmitted to the belt 15, and the wound weft 3 is sent out in the direction of arrow A (see FIG. 1).

Further, according to the embodiment shown in FIG. 4A, the high pressure gas which has passed through the first vacuum generator 46 at this time is
The valve of the first electromagnetic valve 48 is opened so as to be guided to the first gas passage inlet 41a, and the second electromagnetic valve 49 is so arranged as to guide the negative pressure generated by the first vacuum generator 46 to the second gas passage inlet 42a. The valve is closed, and the belt is sucked by the negative pressure at the contact surface with the drive pulley 14, so that the contact pressure between the belt 15 and the pulley 14 can be further increased.

In the control unit 30, the tip 3b of the weft thread 3 reaches the sub nozzles 24 and 25, and the main shaft moves about 120 °.
The sub-valves 26 and 27 are opened at the timing of, and air is jetted from the sub-nozzles 24 and 25, and the weft 3 is sent out to the opening 2a by this air flow. When the tip 3b of the weft 3 is detected by the sensor 29, the main nozzle 8
The weft yarn 3 is cut by a cutter (not shown) arranged between the warp yarn 2 and the warp yarn 2.

The control device 30 has a main shaft of about 14
The main valve 23 is closed at a timing of 0 °, and the sub-valve 2 at a timing of about 250 ° of the main shaft.
Close 6,27. Therefore, the main valve 23 is closed earlier than the sub valves 26 and 27.
Note that the drive unit 21 is controlled to close the gripper 11 at the timing when the main shaft reaches about 240 °, or the sub-valves 26 and 27 are closed when the sensor 29 detects the tip of the weft thread 3, and at the same time the drive unit is driven. The gripper 11 may be closed by controlling 21.

On the other hand, when the sensor 29 detects the front end 3b of the weft thread 3 or when the loom 1 is in an idling state and the weft thread 3 is not fed out, the control means 30 causes the second gas passage 42 of the support 40 to move. High pressure gas is supplied from the high pressure air supply means 43 to the air outlet 42b.
Higher pressure gas is jetted to the inner peripheral surface of the belt 15. Then, as shown in FIG. 3B, the belt 15 and the drive pulley 14 are separated from each other, and the belt 15 which rotates by inertia is rotated around the circumferential curved surface 40.
It is pressed against b and stopped by friction.

Further, according to the embodiment shown in FIG. 4B, the high pressure gas passing through the second vacuum generator 47 is guided to the second gas passage inlet 42a so that the second electromagnetic valve 4 can be guided.
The valve 9 is opened, and the negative pressure generated by the second vacuum generator 47 at this time is first guided so as to be guided to the first gas passage inlet 41a.
By closing the valve of the electromagnetic valve 48, the belt 15 is sucked from the inlet 41a provided in the circumferential curved surface 40b of the support 40, and the pressure contact force between the belt and the circumferential curved surface of the support can be increased.

When the idling state of the loom 1 is released and the cut weft yarn 3 is again fed to the opening 2a of the warp yarn 2, the control means 30 causes the high pressure air feeding means 43 to be supplied.
From, the supply of high-pressure gas to the second gas passage 42 of the support 40 is stopped. Then, to the first gas passage of the support 40,
The high pressure gas is supplied from the high pressure air supply means 43 as shown in FIG.
As shown in, the pressure contact between the belt 15 and the circumferential curved surface 40b of the support 40 is released. Therefore, the rotating drive pulley 1
Belt 15 is pressed against 4 and belt 1
5 is rotated clockwise and the weft 3 wound around the belt 15
Are sent in the sending direction (direction of arrow A).

As described above, in the present invention, even when the drive pulley 14 is rotating during idling of the loom 1, when the weft is being fed out, or when the loom 1 is abnormal, the control device 30 causes the high-pressure air to pass through each passage. By switching to
Since the contact between the drive pulley 14 and the belt 15 can be released, the feeding force (conveying force) to the weft yarn 3 can be reduced. Therefore, it is possible to prevent the excessive tension from being applied to the weft yarn 3 and reduce the yarn breakage of the weft yarn 3.

When the belt 15 of the yarn path unit 10 is separated from the drive pulley 14, the gripper 11
Is closed to prevent the weft yarn 3 from returning to the weft supply portion 7 side, the weft yarn 3 can be fed in a predetermined length at a predetermined timing according to the operation of the yarn path unit 10. Therefore, the burden on the nozzles 8, 24, 25 can be reduced to reduce the pressure of air, and the air consumption can be reduced to save energy and the running cost can be reduced.

Furthermore, since the wefts 3 to be sent out are stopped by the gripper 11, the lengths of the wefts 3 sent out to the opening 2a of the warp 2 are made uniform, so that the loss of the wefts 3 can be reduced and the structure is made. It can be simplified.
In addition, by controlling the operation of the yarn path unit 10, the weft yarn 3 can be sent out in arbitrary lengths at arbitrary timing.

[0037]

According to the present invention, the first and second gas passages for supplying the air supplied from the high-pressure air supply means to the side where the rotating body and the annular body are in contact with each other and the support side are provided, and the woven material In synchronization with the operation of the weft-feeding device related to the operation,
By switching the supply of high-pressure air, it is possible to intermittently control the movement of the annular body that supplies the weft yarn to the nozzle, so that it is possible to simplify the structure, save energy, and reduce running costs. It is possible to reduce the loss of the weft yarn during the operation of the device. Also,
Since air is supplied between the annular body and the contact member, friction between them and frictional heat are reduced, leading to improvement in durability of the annular body.

Further, according to the present invention, the annular body is intermittently rotated by the contacting / separating means between the rotating body and the annular body, while the weft thread is rubbed against the annular body by the fluid ejected from the tensioner and the nozzle. Since the force is applied, the weft yarn is intermittently conveyed to the nozzle due to the intermittent rotation of the annular body, so the jet pressure of the nozzle for sending out the weft yarn is reduced, the burden on the nozzle is reduced, and the occurrence of weft yarn breakage occurs. It can be prevented and the fluid consumption can be saved. Further, since the winding direction of the weft wound around the annular body coincides with the flying direction of the weft, there is no resistance due to the contact portion, and the annular body is intermittently rotated by the contacting / separating means between the annular body and the rotating body. Therefore, the annular body can be smoothly driven and stopped, and a large tension is not applied during the weft transportation, so that the yarn is not broken and it is suitable for weft insertion of high-quality yarn such as ultrafine yarn which attaches importance to texture.

Further, the apparatus is roughly divided into a rotating body, an annular body, and a supporting body. Since there is no intermediate moving part as a contacting / separating means of the annular body, the number of parts is small and the apparatus can be provided at a low cost. In addition, since an air layer is formed between the annular body and the support body while the annular body is being driven and wear of the annular body is prevented, the maintenance of the device is easy together with the absence of intermediate moving parts.
Further, even if there is only one motor as the drive source of the rotating body, a plurality of yarn types can be conveyed by connecting a plurality of yarn path units to the drive shaft of the motor, and the installation place can be narrowed. Economic effect is great.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a fluid injection type loom to which a weft feeding device of the present invention is applied.

FIG. 2 is a configuration diagram of a first embodiment of the present invention.

FIG. 3 (a) shows a weft-feeding operation state of the weft-feeding device according to the first embodiment, and FIG. 3 (b) shows an operation stop state thereof.

FIG. 4 (a) shows a weft delivery operation state of the weft delivery device in the second embodiment, and FIG. 4 (b) shows an operation stop state thereof.

[Explanation of symbols]

 1 Fluid injection type loom 2 Warp 2a Opening 3 Weft 4 Weft feeding device 7 Weft feeder 8 Nozzle 10 Thread guide unit 11 Gripper 12 Driving member (motor) 14 Rotating body (driving pulley) 15 Annular body (belt) 20 Driving circuit 30 Control device 40 Support 41 First gas passage 42 Second gas passage 43 High pressure gas supply means 46 First vacuum generator 47 Second vacuum generator 48 First electromagnetic valve 49 Second electromagnetic valve S Contact and separation means

Claims (1)

[Claims] 1. A device provided between a weft supply unit and a nozzle,
An annular body that is driven by being wound between a rotating body supported by a drive member and a supporting member, and a contacting / separating means for bringing the rotating body and the annular body into contact with and separating from each other are provided. In the weft delivery device adapted to supply the nozzle to the nozzle, the contacting / separating means rotates the annular body and the first gas passage for guiding the high-pressure gas supplied from the high-pressure air supply means in the direction in which the annular body contacts the rotating body. A support body in which a second gas passage that guides in a direction of separating from the body is formed, the second gas passage is made to have a negative pressure when the high-pressure gas is supplied to the first gas passage, and the first gas passage is supplied to the second gas passage. A weft feeding device, characterized in that a vacuum generating device is provided to make the gas passage under negative pressure.