JPH11107121A - Weft feeding in fluid jet loom and weft feeding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel weft-feeding device that can relieve the influence of fluctuation in unreeling tension caused by alteration of the winding diameter, winding hardness and the like of a yarn feeder on the weft insertion and can relax the peak tension of the weft yarn. SOLUTION: In a weft-feeding device in a loom equipped with a weft feeding part always feeding the weft yarn as nipping the weft yarn between a yarn length-measuring roller 4 and a pinch roller 6 and with a weft yarn sending part that intermittently nips the weft yarn with a feed roller 10 and a pinch roller 12 and deliver it to a nozzle 17, a weft yarn trap 9 for trapping the weft yarn with an air flow is set on the upstream of the weft yarn sending part in the direction almost the right angle to the yarn sending part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft insertion method and apparatus for a liquid jet loom, and more particularly to a weft insertion method and apparatus using weft storage means.

[0002]

2. Description of the Related Art In conventional weft insertion of a fluid jet type loom, tension control such as control of peak tension during weft insertion and control of fluctuation of weft tension is an important issue. There was a problem that the quality was impaired, such as generation of woven stripes. In order to solve the problems associated with the peak tension of the weft and fluctuations in tension, a method of monitoring the arrival timing of the weft and automatically controlling the main nozzle pressure has been devised, but the arrival timing of the weft is other than the fluctuation in the tension of the weft. Therefore, it was difficult to completely control the peak tension and make the weft tension uniform.

[0003]

In a weaving machine such as a fluid jet loom in which high-speed weft insertion is performed, as described above, the control of the tension of the weft is a particularly important problem, and the weft in which the tension of the weft can be accurately controlled. There is a need for the development of loading methods and devices. The present invention solves the above-mentioned problems of the prior art, and reduces a peak tension at the time of stopping weft insertion, and a new weft insertion method in which fluctuation of the weft tension does not occur due to a change in the winding diameter of the yarn supplying body. And a weft insertion device.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a roller flight area in which a weft stored in a weft storage means is supplied to a main nozzle by a feed roller, and the weft is inserted by a traction force of a fluid. In the vicinity of the weft arrival point, the weft stored in the weft storage means is pulled out by the traction force of the fluid, and the free flight area for weft insertion and when all the wefts stored in the weft storage means are drawn out, directly by the length measuring roller. It is supplied to the main nozzle and divided into length-measuring flight areas where weft is inserted by the traction force of fluid, and weft insertion is performed, and the weft flight speed between each area is controlled so as to gradually decrease This is a weft insertion method in a fluid jet loom.

According to the present invention, a roller flight area, a free flight area, and a length measurement flight area are provided in the weft insertion process of one pick, and the weft flight speed between the areas is reduced stepwise. Control so that the peak tension at the start of weft insertion and at the stop of the weft can be reliably reduced, and since the last area of weft insertion is a length-measuring flight, weft measurement is more accurate. Can be.

[0006] If an initial free flight area is provided at a lower speed than the roller flight area at the beginning of weft insertion, rapid acceleration is prevented from being applied to the weft at the time of weft insertion. Weft breakage in the running area can be prevented.

[0007]

DETAILED DESCRIPTION OF THE INVENTION According to a first aspect of the present invention, in a weft insertion method for a fluid jet loom, a weft yarn stored in a weft storage means is supplied to a main nozzle by a feed roller and a traction force of the fluid is provided. The wefts stored in the weft storage means near the arrival point of the weft are drawn out by the traction force of the fluid, and the free flight area for weft insertion and all the wefts stored in the weft storage means are drawn out. When the weft is fed directly to the main nozzle by the length measuring roller, the weft is divided into length measuring flight areas where weft is inserted by the traction force of the fluid, and the weft flight speed between each area is stepwise. A weft insertion method in a fluid jet loom characterized by being controlled to decrease, according to the present invention, a roller flight area, a free flight area, and a length measurement flight in a one pick weft insertion process. Areas were set and the weft flight speed between each area was controlled so as to decrease gradually, so the peak tension at the start of weft insertion and at the stop of the weft can be reliably reduced, and weft length measurement can be improved. Has an effect that can be performed accurately.

According to a second aspect of the present invention, in the weft insertion method for a fluid jet loom, the weft yarn stored in the weft storage means is pulled out by the pulling force of the fluid from the main nozzle or the main nozzle and the boost nozzle. The initial free flight area, the weft stored in the weft storage means is supplied to the main nozzle by a feed roller, and the roller flight area in which weft is inserted by the traction force of the fluid, and stored in the weft storage means near the weft arrival point. Late free flight area to pull out the weft yarn by the traction force of the fluid from the main nozzle or the main nozzle and the boost nozzle, and insert the weft,
When all the wefts stored in the weft storage means are drawn out, the weft is directly supplied to the main nozzle by the length measuring roller, and the weft is inserted by the traction force of the fluid from the main nozzle or the main nozzle and the boost nozzle. Weft insertion is divided into zones, and the weft running speed is controlled so as to decrease in the order of the roller running zone, the first and second free running zones, and the length measuring running zone. The weft insertion method, in addition to the effect of the invention according to claim 1, by providing an initial free flight area lower than the roller flight area at the beginning of weft insertion, rapid acceleration of the weft during weft insertion. This has the effect of preventing the occurrence of breakage of the weft in the roller running area where the weft runs at high speed.

If the injection timing of the main nozzle (operating timing of the electromagnetic valve) is too close to the timing of pinching / conveying the yarn by the pinch roller (operating timing of the solenoid), the weft speed sent by the pinch roller becomes the weft of the main nozzle. Since the yarn speed is higher than the yarn speed to be inserted, slack of the yarn occurs between the main nozzle and the pinch roller, and a weft insertion failure may occur. In that case, a free flight section is provided by the main nozzle or the main nozzle and the boost nozzle. By accelerating the yarn and then supplying the yarn accelerated by the pinch roller, the speed difference between the yarn inserted from the main nozzle and the yarn supplied from the pinch roller to the main nozzle is reduced, and stable weft insertion is possible. And has the effect of enabling stable operation.

According to a third aspect of the present invention, the weft insertion in the free flight area and the length-measuring flight area is performed by the traction force of the fluid from the main nozzle temporarily pressurized. Claim 2.
In addition to the function of the invention described above, the same effect as that of the invention described in the second aspect can be obtained by the simple means of providing a control valve for increasing pressure in the control valve of the conventional main nozzle.

According to a fourth aspect of the present invention, there is provided a fluid having a weft supply section for constantly supplying a weft by a length measuring roller and a pinch roller, and a weft sending section for holding the weft between a feed roller and a pinch roller and sending the same to a nozzle. In the injection loom, a weft storage means for storing the weft by an air flow upstream of the weft supply section is provided in a direction substantially perpendicular to the weft supply section, and the weft stored in the weft storage means is supplied to the nozzle by a feed roller, The roller flight area where the weft is inserted by the traction force of the fluid, the weft stored in the weft storage means is drawn out by the traction force of the fluid, and the free flight area where the weft is inserted and the weft stored in the weft storage means are all drawn out. At times, weft yarn is directly supplied to the main nozzle by the length measuring roller, and the weft is inserted into the length measuring flight area where weft is inserted by the traction force of the fluid. A weft insertion device in a fluid jet loom, characterized in that the weft is continuously pinched and pulled by a length measuring roller and a pinch roller, so that the weft supplied from the weft supply unit is supplied to a weft supply unit. When pulled out from the winding diameter, the change in tension caused by the change in unwinding resistance due to the change in winding hardness is removed, and further, by using a weft storage means and a feed roller, intermittent pulling means by a pinch roller, Since the flight speed of the weft during weft insertion is gradually reduced from the time of weft insertion to the arrival point of the weft, and the final weft flight is performed by the weft supplied directly from the weft supply unit, it is possible to accurately measure the weft length. This has the effect of reducing the peak tension when the weft stops.

According to a fifth aspect of the present invention, the weft feeding section includes a pinch roller and a gripper unit that are alternately operated by a solenoid, and supports the pinch roller and the gripper unit at an inoperative position when the solenoid is not operated. A weft insertion device in a fluid jet loom characterized by comprising means, wherein in addition to the function of the invention according to claim 4, a roller flight area, a free flight area, and a length measurement flight area Has a function of performing the switching control more accurately and controlling the weft feeding to the main nozzle more accurately.

According to a sixth aspect of the present invention, the weft storage means includes a weft storage pipe having an opening on the side of the weft feed section;
A weft insertion device for a fluid jet loom, comprising: an air injection nozzle for injecting air into a storage pipe; and a sensor for detecting a weft at a position immediately before all the wefts stored in the storage pipe are pulled out. In addition to the functions of the fourth aspect of the invention, it has a function of storing the weft yarn with a simple structure and supplying the weft yarn to the roller flight area and the free flight area.

According to a seventh aspect of the present invention, the weft storage means includes a weft storage pipe provided with a weft suction pipe and a weft withdrawal port on an end face on the side of the weft supply section, and a suction means for sucking air from one end of the storage pipe. And a sensor for detecting a weft yarn at a position immediately before the weft yarn stored in the storage tube is completely pulled out, which is a weft insertion device in a fluid jet loom, wherein the invention according to claim 6 has In addition to the function, it is easy to control the negative pressure for sucking the weft in the storage tube, and has an effect of easily controlling the weft storage and the weft tension in the storage tube.

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIGS. FIG. 1 is a plan view of a weft feeding and feeding device of the present invention, FIG. 2 is a side view of the weft feeding device, and FIGS. 3 and 4 are weft flight graphs of the present invention. In FIG. 1, 1 is a yarn feeder, 2 is a yarn guide,
Reference numeral 3 denotes a tensor, reference numeral 4 denotes a length measuring roller, reference numeral 5 denotes an inverter motor for driving the length measuring roller, and reference numeral 6 denotes a pinch roller provided so as to be able to contact and separate from the length measuring roller 5. Reference numeral 8 denotes an air injection nozzle for injecting air into the weft storage pipe 9, 8 a denotes a yarn guide provided in the storage pipe 9, and 9 a denotes a nozzle 17 of the storage pipe 9.
It is an opening provided in the longitudinal direction of the side. 7 is a storage pipe 9
The yarn guide 7 guides the weft yarn Y in a direction substantially perpendicular to the direction of the opening 9a. A feed roller 10 is provided downstream of the yarn guide 7, and a pinch roller 12 is provided so as to be able to contact and separate from the feed roller 10. I have. Reference numeral 21 denotes a sensor provided at a position immediately before all the wefts stored in the storage pipe are pulled out and detecting the wefts. Reference numeral 11 denotes a motor for driving a feed roller. Reference numeral 13 denotes a gripper lever. A pinch roller 12 is attached to one end of the gripper lever, and a gripper disk 15 is attached to the other end. 14 is a rotary solenoid, 14a is a solenoid shaft, 15a is a pivot, 16 is a gripper base, and 17 is a main nozzle. Reference numeral 18 denotes a neutral shaft having a lower end fixed to the solenoid shaft 14a, and an upper end thereof is fixed at one end to a receiving surface of a bracket 20, and the other end is provided by two springs 19 fixed to the neutral shaft 18 from both sides. Pinched and supported
When the rotary solenoid is not operated, the solenoid shaft 14a is maintained at the neutral position. 22 is a boost nozzle.

In FIG. 1, a weft yarn Y supplied from a yarn supplying body 1 through a yarn guide 2 and a tensor 3 is supplied to a nozzle 8 provided at an end of a storage pipe 9 by a length measuring roller 4 and a pinch roller 6. Supplied. At this time, the weft is flown in the direction of the tip of the storage pipe 9 by the airflow injected into the storage pipe 9, and the tip is closer to the yarn guide 7 than the pneumatic pipe opening 9 a provided on the nozzle 17 side in the longitudinal direction of the storage pipe 9. Supplied to Next, the weft Y is fed to the feed roller 1 via the yarn guide 7.
0 and the pinch roller 12, and finally weft-inserted from the main nozzle 17.

Next, the operation of the weft feeding device shown in FIG. 2 will be described. Neutral shaft 18 is always 2
2C. When the rotary solenoid 14 is not energized, it is supported at a neutral position as shown in FIG.
4a is also maintains the neutral position, a positive voltage V ₁ is applied to the rotary solenoid 14, as the solenoid shaft 14a is shown in rotation to Figure 2 (a), the pinch roller 12 feed roller 10 And presses the weft to supply it to the nozzle 17. On the other hand, when the negative voltage V ₂ is applied, as shown in FIG.
5 presses against the gripper base 16 and grips the weft between them. The state shown in FIG. 2C is the pinch roller 12,
Between the feed rollers 10, and the gripper disk 15,
The gripper bases 16 are separated from each other, and the weft is directly supplied to the main nozzle 17 without being affected by the operation of the weft feeder.

The operation of the weft in the weft supply and delivery device of the present invention will be described below. First, when a preparation button (not shown) is pressed, the length measuring roller 4 and the feed roller 1 are pressed.
0 rotates. Next, when the operation button is pressed, the loom starts operating, the pinch roller 6 presses against the length measuring roller 4, and the weft Y is continuously supplied to the nozzle 8 side, and supplied to the storage pipe 9 by air jetted from the nozzle 8. 1 and fly in the direction of the tip of the storage pipe 9 due to the air flow jetted from the nozzle 8.
As shown by Y ', the water is sent to the yarn guide 7 while drawing a loop from the opening 9a of the storage tube. Next, when a positive voltage is applied to the rotary solenoid 14, as shown in FIG. 2A, the gripper disk 15 is separated from the gripper base 16, the pinch roller 12 is pressed against the feed roller 10, and the weft is The main nozzle 1 is nipped and pulled by the feed roller 10 and the pinch roller 12.
7 and are weft-inserted by the air flow. When the weft reaches the vicinity of the weft insertion point, almost all of the weft Y 'that has been drawn and stored in the storage pipe 9 shown in FIG. Although the slack disappears as described above, the sensor 21 is positioned just before the weft enters the state of Y ″.
, The energization of the rotary solenoid 14 is stopped by the detection signal, and the pinch roller 12
As shown in (c), the yarn is separated from the feed roller 10, and the operation of holding and pulling the yarn is stopped. On the other hand, since the gripper disk 15 is also separated from the gripper base 16, the weft yarn is drawn out by the air flow from the main nozzle and the auxiliary nozzle, enters the weft, and performs free flight. next,
When the slack disappears as shown by Y ″, the weft yarn is directly supplied from the length measuring roller 4 to the main nozzle 17,
The weft is inserted by the air flow from the auxiliary nozzle,
When the weft reaches the arrival point, a negative voltage is applied to the rotary solenoid 14, and the gripper disk 15 moves to the position shown in FIG. The weft is gripped between the gripper bases 16 and the flight for one pick of the weft is completed.

Next, another embodiment of the weft supply and delivery device of the present invention will be described. FIG. 5 is a plan view showing a weft supply and delivery device according to another embodiment of the present invention. In the figure, reference numeral 23 denotes a weft suction pipe for sucking and supplying the weft supplied from the tensor 3 to a weft storage tube 24, and reference numeral 25 denotes a weft withdrawal provided at the front end of the storage tube 24 at an end perpendicular to the weft supply line of the yarn guide 7. A mouth, 26 is a suction duct for connecting the storage pipe 24 and the blower 27, 28 is a weft passage sensor provided near the front end of the storage pipe 24, and 29 is an opening provided on the front end face of the storage pipe 24. In addition, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The operation of the weft in the above-described embodiment of the present invention will be described. First, when a preparation button (not shown) is pressed, the length measuring roller 4 and the feed roller 10 rotate. In synchronism with this operation, the blower 27 operates, and the inside of the storage pipe 24 is set to a negative pressure via the suction pipe 26, so that air is sucked from the weft suction pipe 23.

Next, when the operation button is pressed, the loom starts operating,
The pinch roller 6 is pressed against the length measuring roller 4, and the weft Y is stored in the storage pipe 2 by the air flow sucked from the weft suction pipe 23.
4, fly in the direction of the tip of the storage tube 24 by the air flow, and are sent to the yarn guide 7 from the weft outlet 25 while drawing a loop in the storage tube 24 as indicated by Y ′ in FIG. 5. . Next, as shown in FIG. 2 (a), when a positive voltage is applied to the rotary solenoid 14 and the pinch roller 12 is pressed against the feed roller 10, the weft is nipped and pulled by the feed roller 10 and the pinch roller 12, and the main yarn is pulled. It is supplied to the nozzle 17 and is weft-inserted by an air flow. In the vicinity where the weft reaches the weft insertion point,
As shown by the weft loop in FIG. 5, the weft in the storage tube 24 is in a state in which the weft Y 'is not slackened like the weft Y ", but immediately before the weft Y", the weft passing sensor 28
Detects the weft, activates the solenoid 14, the solenoid shaft 14a is in the neutral position, and separates the pinch roller 12 from the feed roller 10 as shown in FIG. The weft is the main nozzle,
It is drawn by the air flow from the auxiliary nozzle, and freely flies by the nozzle. Next, when the yarn slack Y ″ disappears,
The weft is supplied directly from the length measuring roller 4 to the main nozzle,
A length measurement run is performed at the peripheral speed of the length measurement roller 4, and when the reaching point of the weft insertion is reached, the solenoid is operated, and the gripper disk 15 moves to the position shown in FIG. The yarn is clamped between the bases 16 and the flight of one pick of the weft is completed.

Next, a three-stage method in each of the above embodiments is described.
The weft insertion operation according to the weft control method is shown in FIGS. 3 and 4.
This will be described using a graph. The peripheral speed of the measuring roller 4
Machine speed x weaving width (including remaining yarn length) "m / min
The weaving width is conveyed continuously within one rotation of the loom,
The weft speed at the time of is shown by the dashed line in the weft flight graph of FIG.
Be forgotten. On the other hand, the peripheral speed of the feed roller
Roller peripheral speed x 360 / θ '_Two−θ₁Expressed in m / min
You. First, θ of FIG.₁Or
Et θ_TwoUntil V₁Is applied and the pinch roller 1
2 is pressed against the feed roller 10 and the weft is a distance L₁Delivery
Sent by the main nozzle and auxiliary nozzle
You. At this time, the peripheral speed of the feed roller 10
It is controlled by controlling the number of revolutions,
θ ₁~ Θ_TwoAngle of rotation of the loom main shaft
Output of the controller to the controller, and according to each angle
Output the voltage applied to the rotary solenoid 14.
And press the pinch roller 12 against the feed roller 10
You. As shown in the weft flight graph of FIG._Four
From θ₁Until the feed roller 10 side pinch roller
12 is separated from the feed roller 10 and
The length measuring roller 4 and the pinch roller 6 feed the weft Y
The storage pipe 9 is opened by the air injection from the nozzle 8.
A loop is drawn from the mouth 9a, and the weft is indicated by Y 'in FIG.
It is stored in a slack state. Next, the weft reaches point B
Approaching, the slack of the yarn in the storage tube disappears, and the weft
If the sensor 21 detects a weft just before the state,
Power supply to the rotary solenoid 14 is stopped.

In the period from θ ₂ to θ ₃ shown in FIG. 3, the voltage applied to the rotary solenoid 14 is 0, and the pinch roller 12 is connected to the feed roller 10 as shown in FIG.
, The conveyance of the weft by the roller is interrupted. At the same time, the gripper disk 15 and the gripper base 16 are also separated from each other, and during this time, the weft is in a free flying state where it is pulled by the air flow from the main nozzle and the auxiliary nozzle, and the weft Y that has drawn a slight loop in the storage pipe is It is supplied until there is no slack as shown by Y ″.

Next, between θ ₃ and θ _{4 in} FIG.
As in the case between θ _{2 and} θ ₃ , the voltage applied to the rotary solenoid 11 is 0, and the feed roller 10 and the pinch roller 12
And gripper disc 15 and gripper base 16
Are separated from each other, and since there is no slack portion Y ′ of the weft in the storage pipe 9, the weft is fed to the length measuring roller 4 and the pinch roller 6.
It is more directly supplied to the main nozzle 17 via the yarn guide 8a, and is weft-inserted by the air flow from the main nozzle and the auxiliary nozzle. By controlling the number of rotations of the length measuring roller driving motor 5, a length measuring flight line between points C and D can be obtained. Next, between θ ₄ and θ ₁ , as shown in FIG. 3, a negative voltage V ₂ is applied to the rotary solenoid 14 to stop the weft from traveling at the weft reaching distance L _3, that is, at the point D, As shown in FIG. 2B, the gripper disk 15 is pressed toward the gripper base 16, and the weft is gripped between the gripper disk 15 and the gripper base 16.

Next, a weft insertion operation by a four-stage weft control method applied to prevent a sudden acceleration from being applied to the weft during weft insertion will be described with reference to a weft flight graph of FIG. First, during the period from θ ₁ to θ ₂ in FIG. 6, no voltage is applied to the rotary solenoid 14, so that the weft is not conveyed by the feed roller 10,
The main nozzle 17 or the nine nozzle 17 and the boost nozzle 22 are drawn out of the storage pipe by the blast air and enter the weft to perform an initial free flight.

Next, during the period from θ ₂ to θ _{3 in} FIG. 6, the operation of the boost nozzle 30 is stopped, a voltage V ₁ is applied to the rotary solenoid 12, and the pinch roller 12 is pressed against the feed roller 10, weft is supplied to the main nozzle 17 by the feed roller 10 performs the attitude control roller flight run by the main nozzle and the length fraction weft insertion distance L ₁ along with the initial free Hihashi.

Next, between θ ₃ and θ _{4 in} FIG. 6, the voltage applied to the rotary solenoid 14 is 0, and the pinch roller 12 is separated from the feed roller 10 as shown in FIG. Move to position and gripper disc 1
Both the gripper base 16 and the gripper base 16 are in the neutral position,
In synchronization with this operation, the boost nozzle 22 is operated again, and the weft enters a free flight state in which the weft is drawn and inserted by the main nozzle 17 and the auxiliary nozzle, or both the nozzles and the boost nozzle 22. Weft Y of tube 24
Is in a state without slack as shown by Y ″.

Next, between θ ₄ and θ _{5 in} FIG.
As in the case between θ _{3 and} θ ₄ , the voltage applied to the rotary solenoid 11 is 0, and the feed roller 10 and the pinch roller 12
Is stopped, and the gripper disk 15 and the gripper base 16 are separated from each other, in the same state as between θ ₃ and θ _4, but there is no slack in the weft in the weft storage tube 24. In the state of Y ″, the weft is directly transferred to the yarn guide 7 by the length measuring roller 4 and the pinch roller 6.
Is supplied to the main nozzle 17 through the main nozzle 1
7. Auxiliary nozzle, or both nozzles and boost nozzle 2
It is weft-inserted by 2 and performs a length measurement flight. By controlling the number of rotations of the length measuring roller driving motor 5, a length measuring flight line between points D and E can be obtained.

Next, during the period from θ ₅ to θ ₁ , as shown in FIG. 6, the weft stops at the weft reaching distance L _3, that is, at the point E, so that the negative voltage V ₂ is applied to the rotary solenoid 14. When the voltage is applied, the gripper disk 15 is pressed toward the gripper base 16 as shown in FIG.
The weft is gripped in between, and the supply of the weft is stopped.

Injection timing of the main nozzle (operation timing of the electromagnetic valve) and timing of pinching and conveying by the pinch roller (operation timing of the rotary solenoid)
Is too close, the weft speed sent by the pinch roller is faster than the yarn speed sent by the main nozzle, so that the yarn may become slack between the main nozzle and the pinch roller and the weft insertion may become unstable. By providing a free flight section by the main nozzle, accelerating the yarn and then conveying the yarn by the pinch roller, it is possible to reduce the speed difference between the yarn sent from the main nozzle and the yarn sent by the pinch roller and to stably operate the yarn. .

In the above four-stage control system, in the free flight area, weft insertion is performed by the auxiliary fluid from the boost nozzle in addition to the ejection fluid from the main nozzle. The same effect can be achieved by temporarily increasing the fluid pressure of the main nozzle to be described. FIG. 7 shows an example of control means for temporarily increasing the fluid pressure of the main nozzle. In the figure, the main nozzle and the sub-nozzle inject air from the air tank by operating the solenoid valves A and B and B ', respectively. I do. In the present embodiment, the air pressure on the sub-nozzle side is set to a pressure 20% to 30% higher than the fluid pressure on the main nozzle side, and by attaching the solenoid valve C to the main nozzle, in the free flight area, When increasing the air pressure of the main nozzle, the solenoid valve A is closed and the solenoid valve C is operated to supply high-pressure air to the main nozzle.

[0032]

According to the conventional drum type weft feeder, when the weft is pulled out from the yarn supplying body, there is a defect that a woven stripe is generated on the woven fabric due to a change in tension generated with a change in the winding diameter. According to the invention, since the weft is continuously pinched and pulled from the yarn feeder by the length measuring roller and the pinch roller and stored and supplied to the storage device, the change in tension pulled out from the yarn feeder is removed from the yarn after transport. You.

Further, since the traveling speed of the weft during weft insertion is sequentially reduced from immediately before the arrival point, and the weft insertion is performed in the length measurement flight state in which the weft is pulled out from the length measurement roller in the final flight, the weft is stopped. The peak tension at the time can be reduced, the weft length can be measured accurately, and the occurrence of yarn breakage can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of a weft supply and delivery device according to the present invention.

FIG. 2 is a side view of the weft feeding device of the present invention.

FIG. 3 is a weft flight graph of the present invention.

FIG. 4 is a weft flight graph of the present invention.

FIG. 5 is a plan view of another weft supply and delivery device according to the present invention.

FIG. 6 is another weft flight graph of the present invention.

FIG. 7 is a block diagram of a nozzle airflow control device of the present invention.

[Explanation of symbols]

 Reference Signs List 1 yarn feeder 2 yarn guide 3 tensor 4 length measuring roller 5 motor for driving length measuring roller 6 pinch roller (for measuring length) 7 yarn guide 8 fluid injection nozzle 8a yarn guide 9 weft storing pipe 9a opening 10 feed roller 11 feed Roller drive motor 12 Pinch roller 13 Gripper lever 14 Rotary solenoid 14a Solenoid shaft 15 Gripper disk 15a Pivot 16 Gripper base 17 Main nozzle 18 Neutral shaft 19 Spring 20 Bracket 21 Sensor 22 Air boost nozzle 23 Weft suction pipe 24 Weft storage pipe 25 Weft Outlet 26 Suction duct 27 Blower 28 Sensor 29 Opening Y, Y ', Y "Weft

Claims (7)

[Claims] In a weft insertion method for a fluid jet loom,
The weft stored in the weft storage means is supplied to the main nozzle by a feed roller, and the weft stored in the weft storage means is pulled out by the fluid traction force in the roller flight area where the weft is inserted by the traction force of the fluid and near the weft arrival point. , A free flight area for weft insertion, and a length measurement flight area in which when all of the weft stored in the weft storage means are drawn out, the weft is directly supplied to the main nozzle by a length measuring roller and the weft is inserted by the traction force of the fluid. A weft insertion method for a fluid jet loom, characterized in that weft insertion is performed in a divided manner, and the weft running speed between the respective sections is controlled so as to decrease stepwise. 2. A weft insertion method for a fluid jet loom,
The weft stored in the weft storage means is pulled out by the main nozzle or the traction force of the fluid from the main nozzle and the boost nozzle, and the initial free flight area for weft insertion, and the weft stored in the weft storage means are fed to the main nozzle by the feed roller. And the weft yarn stored in the weft storage means near the weft arrival point is drawn out by the traction force of the fluid from the main nozzle or the main nozzle and the boost nozzle. When the late free flight area and the weft stored in the weft storage means are all pulled out, the weft is directly supplied to the main nozzle by the length measuring roller, and the traction force of the fluid from the main nozzle or the main nozzle and the boost nozzle is applied. The weft insertion speed is divided into the length measurement flight areas where weft insertion is performed, and the weft flight speed is adjusted to the roller flight area. , Front and late free flying run area, weft insertion method in a fluid jet loom, characterized in that the control to decrease in the order of measuring flying run area. 3. The method according to claim 1, wherein the weft insertion in the free flight area and the length measurement flight area is performed by the traction force of the fluid from the main nozzle which is temporarily pressurized.
A weft feeding method in the fluid jet loom described in the above. 4. A weft feeder in a fluid jet loom having a weft supply unit for constantly supplying a weft by a length measuring roller and a pinch roller, and a weft feeder for sandwiching the weft by a feed roller and a pinch roller and sending the same to a nozzle. A weft storage means for storing the weft by an air flow upstream of the section is provided in a direction substantially perpendicular to the weft sending section, the weft stored in the weft storage means is supplied to the nozzle by a feed roller, and the weft is inserted by the traction force of the fluid. Roller run area,
When the weft stored in the weft storage means is pulled out only by the pulling force of the fluid and the free flight area for weft insertion and all the wefts stored in the weft storage means are drawn out, the weft is directly sent to the main nozzle by the length measuring roller. A weft insertion device in a fluid jet loom, wherein the weft insertion is performed by dividing into a length-measuring flight area in which a supply is performed and the weft is inserted by a traction force of a fluid. 5. The weft feeding section includes a pinch roller and a gripper that are alternately operated by a solenoid, and a support that supports the pinch roller and the gripper at an inoperative position when the solenoid is not operated. 5. The weft insertion device in a fluid jet loom according to claim 4. 6. A weft storage means, comprising: a weft storage pipe having an opening on the side of a weft delivery section; an air injection nozzle for injecting air into the storage pipe; and a position immediately before all the wefts stored in the storage pipe are drawn out. 5. The weft insertion device in a fluid jet loom according to claim 4, wherein said weft insertion device comprises a sensor for detecting a weft. 7. A weft storage means comprising: a weft storage pipe provided with a weft suction pipe and a weft withdrawal port on an end face on a side of a weft feeding portion; a suction means for sucking air from one end of the storage pipe; and a weft storage means stored in the storage pipe. 5. The weft insertion device for a fluid jet loom according to claim 4, further comprising a sensor for detecting the weft at a position immediately before all the wefts are pulled out.