JP2000234243A - Weft holder for fluid-jet loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weft holder that can inexpensively realize the holding and release of the weft synchronized with the weft-inserting motion, has a simple structure and can meet the speeding-up of the weaving machine. SOLUTION: The objective weft holder is provided with the magnet on the driving side that is mounted to the reed or its supporting or driving member, the weft yarn holder 7 comprising a pair of members 5, 6 of which at least one is the opening member 6 disposed at the weft pass on the flying or beating, and the magnet 9 on the driven side in order to open or close the opening and closing members. The magnet 9 on the driven side is disposed in the action range of the magnetic force lines in a partial area of the locus of the magnet on the driving side that moves synchronously with motion of the beating. The timing of the weft folding or the weft release can be set by arranging the magnet on the driven side at which position on the locus of the magnet 9 on the driving side, as it keeps its polarity to which direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft holding device for a fluid jet loom, and more particularly to an end of a weft after weft insertion which is provided in a weft passage during flying or driving. More particularly, the present invention relates to a weft holding device suitable for holding a nozzle-side end portion of a weft after beating.

[0002]

2. Description of the Related Art In a fluid jet loom, in order to detect a weft and stabilize the tension of the weft during beating, a weft holding device for holding a weft-inserted weft end on a nozzle side and an end opposite to a nozzle side. Is used. There are various types of weft holding devices used for this purpose, such as a device that uses a beating operation to bend a weft in a zigzag manner and holds it with the frictional force. A device that holds a weft yarn by using an adhesive force is widely used.

On the other hand, in order to obtain a recently differentiated fabric or a fabric having a special function, there has been a demand to perform weaving using a weft having a very large expansion and contraction ratio on a fluid jet loom, especially a water jet loom. . This kind of weft has an expansion / contraction ratio of 400 to 600%. If the end of the weft nozzle side is cut after being beaten, the weft shrinks and the nozzle comes off. It is an essential condition to enable weaving to hold the end of the weft on the nozzle side after being beaten.

As a weft holding device aiming at satisfying this condition, for example, Japanese Patent Application Laid-Open No. 8-49134,
JP-A-8-260291, JP-A-8-26029
The technology disclosed in Japanese Patent Publication No. 2 (Japanese Patent Application Publication) No. 2 is known. The technology disclosed in the former two publications has a structure in which the weft is held by the surface tension or adhesive force of water, and the latter uses a gripping finger that opens and closes by switching the current of an electromagnet to hold and release the weft. This is the structure to be performed.

[0005]

However, the expansion ratio is 400
%, It becomes difficult to hold the weft only by the surface tension or adhesive force of water. Therefore, in order to increase the holding force of the weft, a structure is required in which the weft is guided between the two resilient members and the weft is held using the frictional force. However, the end of the weft on the nozzle side after beating is a portion that will be the flying tip at the next weft insertion. Therefore, when the holding force of the yarn in this portion is increased, the release of the flying tip is delayed at the next weft insertion, the weft bends in a U-shape and is guided into the warp opening, and the double pick and the weft end of the weft are entangled. And cause various weaving defects. Further, since the flight of the weft is not performed smoothly, the injection pressure of the nozzle is increased, and the weaving speed is suppressed.

On the other hand, as disclosed in the latter publication,
By appropriately holding and releasing the weft by turning the current on and off using an electromagnet, the nozzle end of the weft can be held with a sufficient holding force without the above-described obstacles during weft insertion. However, in this structure, if the weaving speed is to be increased, the response speed of the electromagnet must be increased, so that the apparatus becomes expensive. That is, in this conventional device, it is necessary to change the energized state of the electromagnet at the moment of holding and releasing the weft, but when the energized state of the electromagnet is rapidly switched, a large back electromotive force is generated.
In order to switch the energized state, a large voltage is required, the electric device becomes expensive, and the heat loss of the electromagnet increases.

The present invention has been made in view of the above-described problems of the conventional apparatus, and has a simple structure, and therefore, can be realized at a low cost, and can hold and release a weft in synchronization with a weft insertion operation. It is another object of the present invention to provide a weft holding device that can handle the above.

[0008]

According to a first aspect of the present invention, there is provided a weft holding device for a fluid jet loom, comprising a reed or a drive side magnet mounted on a support or a driving member thereof, and a weft passage for flying or beating. And a weft holding member 7 composed of a pair of members 5, 6 at least one of which is an opening / closing member 6, and a driven magnet 9 mounted to open or close the opening / closing member. The driven magnet 9 is disposed within the range of action of the lines of magnetic force in a section of the movement trajectory of the driving magnet that moves in synchronization with the beating operation. This structure is suitable for a water jet loom where the weft insertion nozzle is located at a fixed position.

According to a second aspect of the present invention, the drive-side magnet 12 is fixedly provided at the upper end of the slay 10 or the slide through the magnet holder 11 with its north pole or south pole facing upward. Is a gripping pair consisting of a swinging finger 6 and a fixed finger 5 arranged in a weft passage extending from the weft insertion nozzle 1 to the weaving nozzle side end, and the driven magnet 9 has its N pole or S pole directed downward. The weft holding device for a fluid jet loom according to claim 1, wherein the weft holding device is fixedly mounted on the swing finger (6).

According to a third aspect of the present invention, there is provided a weft holding device for a fluid jet loom, comprising a pair of members provided with at least one of which is an opening / closing member provided in a weft passage during flying or beating. 7, a driven magnet 9 mounted on and mounted on a reed or its supporting or driving member so as to open or close the opening / closing member, and a part of the movement locus of the driven magnet is set within the range of action of the line of magnetic force. And the drive-side magnets 12 arranged in this manner. This structure is suitable for an air jet loom in which a weft insertion nozzle is mounted on a slay.

According to a fourth aspect of the present invention, two drive-side magnets 12 for opening and closing are fixedly provided on a loom frame via a magnet holder 11 with their N pole or S pole facing upward. The weft holding device 7 is a gripping pair composed of a swinging finger 6 and a fixed finger 5 disposed in the weft passage just before the weft insertion nozzle 1, and the driven magnet 9 has its N pole or S pole directed downward. It is provided with an attraction member 27 fixedly mounted on the oscillating finger 6 and moving together with the driven magnet and holding the open or closed state of the oscillating finger by the magnetic force of the driven magnet. A weft holding device for a fluid jet loom according to claim 3.

The driving magnet 12 and the driven magnet 9 are either permanent magnets (claim 5), or one of them is an electromagnet, and a means for converting the conduction state is provided (claim 7).

According to a sixth aspect of the present invention, a plurality of driving magnets 1 are provided.
2, switching devices 15 and 16 for selectively advancing the drive-side magnet into the area of action of the lines of magnetic force to the driven-side magnet, and weft holders 7 respectively arranged in the weft passages corresponding to the plurality of weft insertion nozzles. The weft holding device for a fluid jet loom according to claim 5, characterized by comprising:

The structure in which the driving side magnet 12 and the driven side magnet 9 are made permanent magnets does not require any electric control device, so that the structure of the device becomes very simple. The timing of holding or releasing the weft can be set according to which position on the movement trajectory of the drive-side magnet 9 and in which direction the polarity of the driven-side magnet is arranged.

It is not necessary that the number of the driven side magnet and the driving side magnet provided in one weft gripper be one, for example, a moving magnet (repulsion beating) in combination with a detent mechanism (two-position stopping mechanism) or a suction member 27. By arranging a plurality of stationary magnets (driving side or driven side magnets provided at fixed positions) at different positions along the movement trajectory of the driving side or driven side magnet that moves in synchronization with the operation, the desired timing is obtained. The holding and release of the weft yarn and the maintenance of the holding state and the released state can be performed. Further, the length of the period for holding or releasing the weft can be set by the size of the drive side magnet or the driven side magnet in the direction along the movement locus of the moving magnet.

In the embodiment described later, a material having magnetic permeability is used for the fixed finger 5 and the oscillating finger 6 so as not to hinder the magnetic action between the driving magnet and the driven magnet. With a structure such as mounting a magnet via a magnet holder extending to the side of the finger, a magnetic force can be applied at a position distant from the position where the yarn is actually held.

In the structure using an electromagnet as the driving side magnet or the driven side magnet, the switching between holding and release of the weft holding device can be changed by switching the electromagnet on / off or switching the polarity. This is useful, for example, when changing the weft insertion order during weaving in a two-nozzle loom.
The switching of the energized state in the case of using the electromagnet may be performed while the drive-side magnet and the driven-side magnet are at separate positions where no magnetic force acts on each other. Therefore, there is sufficient time for switching the energization state of the electromagnet, and the electromagnet can be controlled by an inexpensive electric device having a lower voltage than that of the conventional device.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 and 2 show a first embodiment of an example of the simplest structure of a water jet loom for holding a nozzle end of a weft driven into a weave by a weft holding device of the present invention (FIG. FIG. 2 is a side view, and FIG. 2 is a plan view of an end on a nozzle side. In the water jet loom, usually, the weft insertion nozzle 1 is provided at a fixed position.

In the loom shown in the figure, the weft is
From the warp opening, and is driven into the cloth fell 3 by the beating operation of the reed 2. The nozzle side end of the weft driven into the weave is stretched between the nozzle end 3a before the weave and the nozzle tip 1c. In this state, the end of the weft on the nozzle side is cut by the cutter 4. However, when the expansion / contraction ratio of the weft is large, the phenomenon that the weft on the nozzle side after being cut by the cutter shrinks and falls off from the tip of the nozzle. Occurs. In order to prevent this, in the illustrated apparatus, the fixed finger 5 and the oscillating finger 6 elastically pressed by the fixed finger 5 are arranged so as to sandwich the weft stretched between the nozzle side end of the weaving and the nozzle tip. The weft holding device 7 is arranged.

The fixed finger 5 and the swing finger 6 are fixed to the frame of the loom via the support bar 8. The fixed finger 5 is a non-magnetic stainless steel plate, and the swing finger 6 is a thin beryllium copper plate having elasticity. The swing finger 6 has a fixed base end (the front side of the loom),
It is resiliently pressed against the fixed finger 5 by its own elasticity. Tip of fixed finger 5 and swing finger 6 (back side of loom)
Is open like a trumpet so as to guide the weft between them.
A driven magnet 9 is adhered with the N pole facing downward, on the tip end side of the upper surface of the swing finger 6.

On the other hand, the drive side magnet 1 is attached to the nozzle side end of the
2 is fixed with the N pole facing upward. Drive magnet 1
Both 2 and the driven side magnet 9 are permanent magnets. The fixed position of the drive-side magnet 12 is just below the fixed finger 5. When the slay 10 swings for beating, the drive-side magnet 12 and the driven-side magnet 9 face each other at a position where the crank angle is approximately 90 degrees. I do. Since the two magnets are provided so that the N poles face each other, when the two magnets 9 and 12 face each other, the driven magnet 9 is repelled, and the swing finger 6 flexes upward and opens.

The weft flying by the jet flow of the weft insertion nozzle 1 is driven into the cloth fell 3 by the forward movement of the reed 2. At the time of this driving, the portion of the weft immediately before the nozzle is obliquely stretched between the nozzle tip 1c and the nozzle end 3a of the weave, and the portion of the weft guided to the trumpet-shaped opening is It is guided between the fixed finger 5 and the oscillating finger 6 and is held by the elasticity of the oscillating finger 6.
When the drive-side magnet 12 and the driven-side magnet 9 face each other while the reed is moving forward, the swing finger 6 is opened and the weft is grasped temporarily. The opening / closing movement of the swing finger 6 has no effect on the weft yarn.

After the beating is performed, when the reed retreats and the nozzle side end of the weft is cut by the cutter 4, the weft tries to shrink, but is held by the weft holding tool 7, so Remains in the state of. At the timing immediately after the reed retreats and the fluid is ejected from the nozzle for the next weft insertion, the driving magnet 12
Face the driven magnet 9 (the positional relationship between the two magnets is determined so that the two magnets face each other at this timing).
Then, the swinging finger is opened by the reaction force of the two magnets, and the weft that has been gripped is released to fly as the weft tip of the next pick.

After the swing finger 6 is opened during the movement of the reed toward the cloth fell, if there is a possibility that the weft gripping may not be stabilized due to the bumping operation, as shown in FIG. The auxiliary driven magnet 13 with the S pole facing downward is fixed to the base end side. After the driven magnet 9 is repelled by the drive magnet and the swing finger 6 is opened, the swing finger 6 to be opened again by pumping is moved to the drive magnet 1.
2 attracts the S-pole of the auxiliary driven magnet 13 at the next moment and suppresses it, and stabilizes the holding of the weft after beating.

FIGS. 4 and 5 show a third embodiment in which the present invention is applied to a loom provided with two weft insertion nozzles. The two weft insertion nozzles 1a and 1b are arranged side by side in the front-rear direction of the loom, and the yarn passages from each nozzle tip to the nozzle side end 3a before weaving are two passages having different angles on the same plane. It is formed. It is necessary to guide the two wefts so that they do not become entangled in this passage. In the example of the figure, the wefts from each nozzle are guided above and below the fixed finger 5a common to the upper and lower weft holders 7a and 7b. It has become. Oscillating fingers 6a and 6b are arranged above and below the fixed finger, and the upper oscillating fingers 6a and 6b are arranged.
Driven magnets 9a and 9b with their N poles facing downward are bonded to both the upper surface of a and the lower surface of the lower swing finger 6b. The mounting position and mounting structure of the weft grippers 7a and 7b are as follows.
1 and 2, the lower swing finger 6b corresponding to the back weft insertion nozzle 1b is longer than the upper swing finger 6a because the weft passage is slightly back and forth. The fixed position of the driven magnet 9b is also slightly deeper.

On the other hand, a rotary magnet holder 14 having four drive-side magnets 12 fixed at positions that divide the outer periphery into four parts is mounted on the nozzle side end of the slay so as to be freely rotatable around an axis in the weft flight direction. Have been. The four drive-side magnets 12 are mounted alternately with the north and south poles facing outward. A ratchet wheel 15 having four ratchet teeth on the outer periphery is provided coaxially with the rotating magnet holder 14,
On the other hand, a ratchet pawl 16 facing the ratchet wheel is mounted on a fixing member of the loom. Further, a magnetic plate 17 such as an iron plate attracted by another magnet is fixed to the slay so that one of the drive-side magnets 12 is held at a position facing upward.

The operation when the ratchet pawl 16 is provided on the driving end side of the slay will now be described. With the drive-side magnet 12 with the N-pole facing the outer periphery facing upward, the opposite drive-side magnet and the magnetic plate 17 are attracted to fix the rotation of the rotary magnet holder 14. The end of the back side weft ejected from the back side nozzle 1b at the time of the previous pick is held by the lower side weft holding tool 7b. When the reed moves forward after weft insertion, the magnetic action of the drive-side magnet 12 causes
The upper swing finger 6a is temporarily opened, and the lower swing finger 6b is temporarily pressed strongly against the fixed finger 5a. These actions have no effect.

When the front side weft is driven in, the nozzle side yarn end of the weft is held by the upper side weft holder, and the ratchet pawl 16 rotates the rotary magnet holder 14 by 90 degrees, and the drive side magnet with the S pole facing outward. Faces upwards. This state is maintained by the opposite driving magnet attracting the magnetic plate 17. The reed starts retreating, the weft end is cut, and the fluid ejection is started from the back side nozzle 1b.
Immediately thereafter, the drive-side magnet 12 with the south pole facing upward opens the lower swing finger 6b and presses the upper swing finger 6a against the fixed finger 5a. When the lower swing finger 6b is opened, the weft end of the back side nozzle 1b is released, and the weft flies.

When the reed advances again for beating, the lower swing finger and the upper swing finger repeat the above-mentioned operations, but these operations do not produce any effect. Then, when beating is performed, the ratchet pawl 16 rotates the rotating magnet holder 14 by 90 degrees to turn the N pole upward. Next, when the reed starts retreating, the end of the back side weft is cut, and fluid ejection of the front side nozzle is started. While the reed is retreating, the drive-side magnet with the N pole facing upward presses the lower oscillating finger 6b against the fixed finger 5a to temporarily open the upper oscillating finger 6a. At this time, the holding of the front side weft is released, and the leading end of the weft flies. By repeating the above operation, the front side weft and the back side weft are alternately inserted. When two N poles are successively and outwardly mounted on the rotating magnet holder 14 with the driving magnets 12, two front wefts and two back wefts are alternately inserted.

Instead of the four driving magnets in the above embodiment,
As shown in FIG. 6, one DC electromagnet 18 is provided, and the energizing direction switching means 19 is provided, so that the opening and closing of the upper oscillating finger 6a and the lower oscillating finger 6b can be electrically controlled arbitrarily. be able to. That is, by synchronously switching the control of the injection valves of the two nozzles and the conversion of the polarity of the electromagnet 18, it is possible to insert the front weft and the back weft in any order.

In the two-nozzle loom, as shown in FIGS. 7 and 8, the weft holding members 7a and 7b corresponding to the front side weft 20 and the back side weft 21 are arranged side by side in the weft flight direction and provided on the slay. The two drive side magnets are reciprocated in the weft flight direction and opposed to the driven side magnets of the corresponding weft holder for each pick, thereby alternately releasing the yarn ends of the two weft holders. Is possible. As a mechanism for reciprocating the drive-side magnet 12 in the weft flight direction, a mechanical structure using a butting tool and a detent mechanism or an electrical structure using a solenoid is possible.

FIGS. 9, 10, and 11 show other means of the weft holding device. The weft holding device of this embodiment includes a slit ring 22 rotatably mounted on the weft insertion nozzle 1 in the circumferential direction and a fixed finger 24. The slit ring 22 has an axial slit 23 at one location on the circumference, and the weft 25
Through to the nozzle side end of the weave. The driven magnet 9 is fixed to the slit ring 22 so as to face downward.

When the driving magnet mounted on the slab passes below the nozzle provided with the slit ring 22 having the above structure, the slit ring 2 is dragged by the movement of the driving magnet.
2 rotates to hold or release the weft 25 passing through the slit 23 with the fixed finger 24.

If the rotating end of the slit ring 22 is held by a magnet and an iron plate provided on both sides thereof, the holding and release of the weft can be switched alternately in relation to the forward and backward movement of the slay. Become. That is, the holding and release of the weft are switched each time the drive-side magnet passes below the nozzle, and the state after the switching is maintained until the next switching operation occurs. On the other hand, if the slit ring 22 is urged to one rotation end by a winding spring or the like, only when the drive-side magnet passes below the weft insertion nozzle in the direction opposite to the urging force of the spring, The weft is temporarily held or released. In the embodiment shown in FIGS. 1, 2 or 4 and 5, when it is desired to hold the swing finger in the holding state or the open state, it is sufficient to provide a drive-side magnet having a dimension covering the holding period.

The weft holding device of the present invention is particularly useful as a holding device for gripping the nozzle-side end of the inserted weft when wefting a weft having a large expansion / contraction ratio. Weft yarns with large expansion and contraction rates are often woven on water jet looms,
Although the above embodiment has been described with reference to a structure suitable for a water jet loom, the weft holding device of the present invention can also be used in an air jet loom. In the air jet loom, the weft insertion nozzle 1 is mounted on the slay and makes a synchronous movement with the reed. Therefore, the weft holding member 7 and the driven-side magnet 9 are provided on a moving member such as a slay, and the driving-side magnet 12 is provided on a stationary member such as the support bar 8 extending from the loom frame.

FIGS. 12 to 15 are views showing an example of an air jet loom for holding the end of the weft on the nozzle side in the apparatus of the present invention. 12 is a perspective view showing a weft insertion portion of a loom, FIG. 13 is a schematic side view showing a weft holding device mounted on a sley, FIG. 14 is a side view showing the operation of the weft holding device, and FIG. It is a schematic diagram which shows a clamping state and a release state.

As described above, the weft insertion nozzle 1 of the air jet loom is attached to the slay 10 with the nozzle tip facing the air guide 26 provided on the reed 2. Weft holder 7
Has a swinging finger 6 and a fixed finger 5 arranged above and below the weft passage just before the nozzle 1. As shown in FIG. 15, the oscillating finger 6 enters between the fixed fingers 5 formed of two bar members provided in a fork shape, and grips the weft 25 in a bent state. The driven magnet 9 is fixed to the swing finger 6.

The driving magnet is mounted on a support bar 8 fixed to the frame of the loom. In the apparatus of this embodiment in which the weft holding member 7 is provided in the weft passage just before the nozzle 1, it is necessary to keep the open state of the swing finger 6 continuously while the weft is flying. In the water jet loom shown in the first embodiment and the like, it is sufficient that the swing finger is open when the flight starts. In order to realize this operation, in the apparatus of the sixth embodiment, the supporting bar 8 is provided with the driving magnet 12a for opening operation and the driving magnet 12b for closing operation, and the magnetic member for holding the swing finger 6 in the open state. A suction plate 27 made of a material is provided on the side of the reed 2.

13 and 14, the opening operation drive magnet 12a magnetically repels the driven magnet 9 to open the swing finger 6, and the closing operation drive magnet 12b causes the driven magnet 9 to move. The swing finger 6 is closed by magnetic attraction. The opened swing finger 6 is attracted to the attraction plate 27 by its own magnetic force and held in the open state until it is attracted by the closing drive magnet 12b. When it is desired to avoid a decrease in the magnetic force due to the separation of the driving magnet and the driven magnet, for example, in the example of FIGS. The side magnet 9 is configured to repel magnetically and close.

The opening drive magnet 12a is provided at a weft insertion start position (for example, a crank angle of 90 degrees), and the closing drive magnet 12b is provided at a position immediately before a beating (for example, a crank angle of 300 degrees). Have been. When the reed 2 retreats and the driven magnet 9 and the opening operation driving magnet 12a face each other, the swing finger 6 moves upward to release the weft.
At this time, air is simultaneously ejected from the nozzle 1 to start weft insertion. When the reed 2 moves forward after reaching the retreating end and immediately before it is beaten, and the driven magnet 9 faces the closing drive magnet 12b, the swing finger 6 moves down to grip the weft. In this state, beating is performed, and the end of the weft on the nozzle side is cut by the cutter. By repeating this operation, weft insertion is performed.

As described above, the holding and release of the weft of the weft holding device of the present invention can be performed by arbitrarily setting the opening and closing timing of the weft according to the dimensions and the positional relationship between the driving magnet and the driven magnet. Since the period can be set freely, it can be used not only for holding the weft end on the nozzle side when using a highly elastic weft, but also for holding the weft end on the side opposite to the nozzle.

[Brief description of the drawings]

FIG. 1 is a side view of a weft holding device according to a first embodiment.

FIG. 2 is a plan view of the apparatus of FIG. 1;

FIG. 3 is a side view of a second embodiment of the weft holding device.

FIG. 4 is a side view of a third embodiment in which the present invention is applied to a two-nozzle loom;

FIG. 5 is a side view showing a first example of a drive-side magnet switching device in a two-nozzle loom.

FIG. 6 is a side view showing a second example of the drive-side magnet switching device in the two-nozzle loom.

FIG. 7 is a side view of a fourth embodiment in which the present invention is applied to a two-nozzle loom;

FIG. 8 is a plan view of the device of FIG. 7;

FIG. 9 is a side view of a fifth embodiment of the weft holding device.

FIG. 10 is a cross-sectional plan view of the device of FIG. 9;

FIG. 11 is a side view showing the weft holding state of the apparatus of FIG. 9;

FIG. 12 is a perspective view showing a sixth embodiment.

FIG. 13 is a schematic side view of the sixth embodiment.

FIG. 14 is a side view showing the operation of the sixth embodiment.

FIG. 15 is a view schematically showing holding and releasing of a weft;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nozzle 5 Fixed finger 6 Swing finger 7 Weft holding device 9 Follower side magnet 10 Slay 11 Magnet holder 12 Drive side magnet 19 Switching means

Claims (7)

[Claims] 1. A reed or a drive-side magnet (12) mounted on a supporting or driving member thereof, and a pair of members at least one of which is an opening / closing member (6) provided in a weft passage at the time of flying or beating. (5, 6), a weft holding device (7), and a driven magnet (9) mounted to open or close the opening and closing member, the driven magnet (9) is synchronized with the beating operation A weft holding device for a fluid jet loom, wherein the weft holding device is disposed within a range of action of magnetic lines of force in a partial section of a movement locus of a drive-side magnet that moves. 2. A drive magnet (12) having its north pole or south pole facing upward through a slay (10) via a magnet holder (11).
Or it is fixedly provided at the upper end of the slide,
The weft holding device (7) is a gripping pair consisting of a swinging finger (6) and a fixed finger (5) arranged in a weft passage extending from the weft insertion nozzle (1) to the end of the weaving nozzle on the side of the weaving nozzle. The weft holding device for a fluid jet loom according to claim 1, wherein the magnet (9) is fixedly mounted on the swing finger (6) with its north or south pole facing downward. 3. A pair of members (5, 6) provided at least one of which is an opening / closing member (6) provided in a weft passage at the time of flying or beating.
A weft holding device (7), a driven magnet (9) mounted and mounted on a reed or its supporting or driving member to open or close the opening and closing member, and a movement locus of the driven magnet. A weft holding device for a fluid jet loom, comprising: a drive-side magnet (12) arranged so that a part of the section is within the range of action of the lines of magnetic force. 4. Two drive-side magnets (12) for opening movement and closing movement.
With its N or S pole facing upwards
(11) is fixedly provided on the loom frame,
The weft holding device (7) is a gripping pair consisting of a swinging finger (6) and a fixed finger (5) arranged in the weft passage just before the weft insertion nozzle (1), and the driven magnet (9) has its N Suction is fixed to the swing finger (6) with its pole or S pole facing downward, and moves with the driven magnet to maintain the open or closed state of the swing finger by the magnetic force of the driven magnet. Members (2
The weft holding device for a fluid jet loom according to claim 3, further comprising (7). 5. The weft holding device for a fluid jet loom according to claim 1, wherein the driving magnet (12) and the driven magnet (9) are permanent magnets. 6. A plurality of drive-side magnets (12), a switching device (15, 16) for selectively advancing the drive-side magnets within the range of action of the magnetic field lines to the driven-side magnets, and a plurality of weft insertions The weft holding device for a fluid jet loom according to claim 5, further comprising a weft holding device (7) disposed in each of the weft passages corresponding to the nozzles. 7. The driving magnet according to claim 1, wherein one of the driving magnet and the driven magnet is a permanent magnet, and the other is an electromagnet.
5. The weft holding device for a fluid jet loom according to 2, 3 or 4.