JP2001146646A - Method for spinning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely and rapidly carry out threading operations of a fiber bundle through a spinning member having a spinning nozzle part and a hollow guide shaft unit. SOLUTION: A real twisted yarn is spun by using a swirling air stream from a swirling nozzle acting on a tip 16a of a hollow guide shaft unit 16 in a usual spinning state. A suction stream is produced in a tip opening 16b of the hollow guide shaft unit 16 in addition to the swirling air stream when carrying out yarn finding operations to thereby suck a fiber bundle 1 fed to the vicinity of the tip opening 15b into the hollow guide shaft unit 16 by the suction stream. Thereby, the percentage of success in piecing is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning method for producing a spun yarn by twisting a fiber bundle drafted by a drafting device by applying a swirling airflow.

[0002]

2. Description of the Related Art A first nozzle having an air injection port for introducing and converging a fiber bundle downstream of a draft device;
A second nozzle having a swirling airflow air injection port for twisting the fiber bundle sent from the first nozzle, a yarn guide tube having a yarn passage hole therein and an air injection port are disposed,
In a steady state in which the yarn is being spun, air is injected from the air injection port of the swirling airflow of the second nozzle, and the injection of air from the air injection port of the first nozzle and the air injection port of the yarn introduction tube is stopped. When the yarn breaks, the yarn guide tube is brought into contact with the outlet of the first nozzle or advanced to a close position, and the swirling airflow of the second nozzle is reduced. The injection of air from the air injection port is stopped, and the injection of air from the air injection port of the first nozzle and the air injection port of the yarn introduction tube is performed, so that the yarns are supplied to the first nozzle, the second nozzle, and the yarn introduction tube. Then, the yarn guide tube is retracted, air is again injected from the air injection port of the swirling airflow of the second nozzle, and the air is injected from the air injection port of the first nozzle and the air injection port of the yarn guide tube. Air injection stops and spinning resumes The spinning method and apparatus is known (see Japanese Patent Laid-Open No. 7-157925).

[0003]

In the spinning method described above, when starting the spinning apparatus or restarting the spinning after the yarn breakage occurs, when the spinning is started or restarted, the yarn guide tube is moved forward. A retreating process and a control process such as start and stop of air injection from the air injection port of the first nozzle, the air injection port of the second nozzle, and the air injection port of the yarn introduction tube are necessary. Alternatively, there is a problem that the process until the spinning is restarted after the occurrence of the yarn breakage is complicated, and the apparatus itself is also complicated.

[0004] An object of the present invention is to solve the problems of the spinning method described above.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention firstly provides that, in a normal spinning state, a swirling air flow from a swirling nozzle acting on a tip end portion of a hollow guide shaft body. In addition to spinning the real twisted yarn using, in addition to the swirling airflow, in addition to the swirling air flow, a suction flow was generated at the distal end opening of the hollow guide shaft body and sent near the distal end opening. The fiber bundle is sucked into the hollow guide shaft body by the suction flow.
During the yarn feeding operation, compressed air is ejected from an auxiliary nozzle in the hollow guide shaft to form an airflow toward the yarn discharge port in the hollow guide shaft, and the yarn is spun, and thereafter, The airflow in the hollow guide shaft is stopped, and the real twist spinning using the swirling airflow by the swirling nozzle is performed continuously with the yarn feeding spinning. After stopping the airflow, the swirling airflow by the swirl nozzle and the yarn spun yarn using the airflow by the auxiliary nozzle are removed, and the real twisted yarn spun using the swirl airflow by the swirl nozzle, And a real twisted yarn pulled out of the package.

[0006]

Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments unless it departs from the gist of the present invention.

Reference numeral 1 denotes a fiber bundle accommodated in a can 2, and D denotes an example of a back roller 3, a third roller 4, a second roller 5 on which an apron belt 5 a is mounted, and a front roller 6. It is a wire draft device. S is a spinning member described later,
Is a yarn feeding member including a nip roller 7a and a delivery roller 7b. Reference numeral 8 denotes a slack tube for temporarily storing the yarn discharged from the spinning member S from which the spinning has been restarted during the splicing operation, and reference numeral 9 denotes a yarn clearer.

Reference numeral 10 denotes a package wound around a bobbin 12 supported by a bobbin holder 11, and the package 10 is configured to be rotated by a friction roller 13 contacting the surface thereof. . 1
Reference numeral 4 denotes a traverse guide of a traverse device (not shown). The bobbin 1 supported by the bobbin holder 11
A winding member W is constituted by the friction roller 2, the friction roller 13, the traverse guide 15, and the like.

The fiber bundle 1 drawn from the can 2 is drafted by a drafting device D, and then enters a spinning member S to be formed into a yarn. Thereafter, the yarn Y discharged from the spinning member S is nipped by a nip roller 7a and a delivery roller 7b constituting the yarn feeding member 7 and sent toward the package 10. While being traversed by the traverse guide 14, the traverse guide 14 comes into contact with the friction roller 13 and is wound around the rotating package 10.

The above-described spinning unit including the draft device D, the spinning member S, the yarn feeding member 7, the slack tube 8, the yarn clearer 9, and the winding member W is mounted on a machine (not shown). Along the line, many are arranged side by side to form a spinning device.

Next, a spinning member S having a spinning nozzle portion 15 and a non-rotating hollow guide shaft 16 will be described with reference to FIGS.

The spinning nozzle 15 has a guide hole 15a for introducing the fiber bundle 1 drafted by the drafting device D;
A frustum of a non-rotating hollow guide shaft body 16 having a needle holder 15c having a needle 15b mounted on the flow path of the fiber bundle 1 discharged from the guide hole 15a and located downstream of the needle holder 15c. The hollow guide shaft body 16 has a swirling airflow generating portion 15d that generates a swirling airflow in the vicinity of the front end portion 16a of the hollow guide shaft body 16 while covering the front end portion 16a at a predetermined interval.

The swirling airflow generating section 15d is formed in a cylindrical shape, and is configured to be assembled concentrically with the needle holder 15c. The fiber bundle 1 sent from the needle holder 15c is provided in the swirling airflow generation unit 15d.
A spinning chamber 15e for applying a swirling airflow to the spinneret is formed, and a front end portion 1 of a hollow guide shaft 16 is provided in the spinning chamber 15e.
6a is accommodated coaxially.

A swirling nozzle 15 for generating a swirling airflow in the spinning chamber 15e is provided in the swirling airflow generating unit 15d.
A plurality of f's are formed. The swirl nozzle 15f is formed as a thin hole communicating with the spinning chamber 15e, and each of the air nozzles 15f is formed along the inner circumference of the swirl airflow generating unit 15d.
As an example, as shown in FIG. 3, the fiber bundle 1 is inclined on the tangent to the spinning chamber 15e and on the downstream side in the feed direction of the fiber bundle 1 so as to flow in the counterclockwise direction (counterclockwise) A in plan view. It is formed. A compressed air supply member 15h in which an air passage 15g is formed is arranged in the spinning nozzle portion 15 so as to surround the swirl nozzle 15f.
h is connected via a pipe to a compressed air supply (not shown).

The hollow guide shaft 16 is connected to the spinning nozzle 15
The needle holder 15c is fitted into a through hole 15k formed in a wall 15j opposite to the wall 15i on the front roller 6 side to which the front roller 6 is attached, and an opening 16b formed in the tip thereof is directed toward the needle 15b. It is configured to be arranged. Further, the yarn passage 16c formed on the axis of the hollow guide shaft body 16 is formed so as to be divergent toward the yarn outlet 16d, and specifically, the yarn passage 16c is formed through the opening 16b. A small-diameter introduction portion 16e extending a predetermined length toward 16d, a first enlarged-diameter portion 16f that is enlarged stepwise downstream from the introduction portion 16e, and a smooth downstream portion of the first enlarged-diameter portion 16f. A second enlarged diameter portion 16g which is connected to the second enlarged diameter portion 16g and a third enlarged diameter portion 16h which is enlarged stepwise downstream of the second enlarged diameter portion 16g. At the end of the third enlarged diameter portion 16h, the above-described yarn discharge port 1 is provided.
6d are formed. The shape of the yarn passage 16c is not limited to the above-described embodiment, but may be a mere stepped shape without the tapered enlarged portion.
The downstream side of the first enlarged diameter portion 16f may be shaped so that the tapered enlarged diameter portion continues to the yarn discharge port.

Frusto-conical tip 1 of hollow guide shaft 16
6a and the outer diameter of the hollow guide shaft 16 located between the large diameter portion 16i near the yarn discharge port 16d is formed as a small diameter portion 16j, and the hollow guide shaft 16 is surrounded by the small diameter portion 16j. Is attached. An air passage 16n is formed between the small diameter portion 16j and the outer cylinder 16k so as to surround the small diameter portion 16j.

The small diameter portion 16j of the hollow guide shaft 16 has
A plurality of auxiliary nozzles 16p provided tangentially to the yarn passage 16c are formed. In this embodiment, as shown in FIG. 3, eight auxiliary nozzles 16p are provided at equal intervals so as to generate a swirling airflow in the clockwise direction (clockwise) B in plan view. The first enlarged portion 16 of 16c
It is formed so as to communicate with f.

Reference numeral 17 denotes a through hole 16 formed in the outer cylinder 16k.
r is a connecting member having a pipe portion 17a fitted to
The connecting member 17 is connected to a pipe 18 connected to a compressed air supply source (not shown).

When compressed air is supplied to the air passage 16n of the hollow guide shaft 16 through a pipe 18 and a connecting member 17 connected to a compressed air supply source (not shown), the compressed air passes through the auxiliary nozzle 16p. Through the thread passage 16
c, and is discharged from the yarn discharge port 16d.
In this way, by supplying the compressed air from the auxiliary nozzle 16p, the yarn is fed into the yarn passage 16c of the hollow guide shaft 16
It is configured to form an air flow from the opening 16b formed at the tip to the yarn discharge port 16d.

Next, the production process of the yarn Y by the spinning unit of the spinning apparatus having the above-described configuration will be outlined.

The fiber bundle 1 drawn out from the can 2 and supplied to the draft device D is drafted by the draft device D, and is generated by the action of compressed air injected from the swirling nozzle 15f of the swirling airflow generating unit 15d. The suction air flow near the guide hole 15a of the needle holder 15c enters the guide hole 15a, and then is sent along the periphery of the needle 15b to enter the spinning chamber 15e.

The fibers constituting the fiber bundle 1 sucked into the spinning chamber 15e are subjected to the action of a swirling airflow which is jetted from the swirling nozzle 15f and is swirling at high speed near the distal end 16a of the hollow guide shaft body 16. The fiber is twisted in the direction of the swirling airflow while being separated from the fiber bundle 1. Further, a part of the twist applied by the swirling airflow tends to propagate in the direction of the front roller 6, but the propagation is prevented by the needle 15b, so that the fiber bundle 1 sent out from the front roller 6 is twisted. Is not twisted. Most of the twisted fibers as described above are successively formed into real twisted yarns (real twisted yarns) Y which are mostly wrapped fibers, pass through the yarn passage 16c of the hollow guide shaft 16, and pass through the yarn outlet 16d.
Is discharged from In such a normal yarn Y production process, compressed air is not supplied to the air passage 16n of the hollow guide shaft 16 from the compressed air supply source via the pipe 18 and the connecting member 17, and therefore, Auxiliary nozzle 16
From p, no compressed air is supplied into the yarn passage 16c.

In a normal spinning state, the yarn Y which is successively formed on the real twisted yarn Y, passes through the yarn passage 16c of the hollow guide shaft body 16, and comes out of the yarn discharge port 16d is fed to the nip roller 7a constituting the yarn feeding member 7. The paper is sent in the direction of the package 10 while being held by the delivery roller 7b, and then, while being traversed by the traverse guide 14, comes into contact with the friction roller 13 and is taken up by the rotating package 10.

Next, a splicing operation for starting the spinning device and a splicing operation when a yarn break occurs will be described.

Before the spinning device is started or when the yarn breaks, a part of the draft roller (in this case, the back roller 3 and the third roller 4) is stopped, and the rotating nozzle 15f and the auxiliary nozzle No compressed air is injected from 16p, and the swirl nozzle 15f and the auxiliary nozzle 16p are in a non-operating state. The fiber bundle 1 whose leading end is gripped by the stopped third roller 4 is sent out by rotating the back roller 3 and the third roller 4 and sent to the spinning member S via the second roller 5 and the front roller 6. Supply. With the start of driving of the stopped draft roller, the injection of compressed air from the swirling nozzle 15f and the auxiliary nozzle 16p is started. That is, when resuming spinning for performing the piecing operation, in the spinning member S, the compressed air is injected from the swirl nozzle 15f, and the compressed air supply source passes through the pipe 18 and the connecting member 17, and the hollow guide shaft 16 is rotated. Compressed air is supplied to the air passage 16n, and therefore, compressed air is also injected into the yarn passage 16c from the auxiliary nozzle 16p.

The swirling nozzle 15f is formed so as to be inclined downstream in the feed direction of the fiber bundle 1, and the compressed air injected from the swirl nozzle 15f flows in the feed direction of the fiber bundle 1 while swirling. Guide hole 1 of holder 15c
The fiber bundle 1 introduced into 5a is sent to the vicinity of the opening 16b formed at the tip of the hollow guide shaft 16 through the needle 15b while being made into a loose false twist state by the swirling airflow.

The compressed air jetted from the auxiliary nozzle 16p is supplied to the yarn passage 1 formed in the hollow guide shaft body 16.
It flows along the inner peripheral surface in 6c to form a swirling airflow. And, as described above, the yarn passage 16c is
d, the compressed air injected into the yarn passage 16c through the auxiliary nozzle 16p flows to the yarn discharge port 16d side, and has a small diameter introduction portion 16e.
Becomes negative pressure. For this reason, air flows in the suction direction (the direction toward the inside of the hollow guide shaft 16) in the opening 16 b formed at the tip of the hollow guide shaft 16. Thereby, the fiber bundle 1 can be continuously drawn into the yarn passage 16 c of the hollow guide shaft 16.

As described above, the fiber bundle 1 in the false twist state sent to the vicinity of the opening 16b formed at the tip of the hollow guide shaft 16 is subjected to the suction flow from the opening 16b.
6b is drawn into the yarn passage 16c. And fiber bundle 1
Reaches the first enlarged diameter portion 16f through the small-diameter introduction portion 16e, and is exposed to the swirling airflow in the spinning nozzle portion 15 in the direction opposite to the swirling airflow formed by the swirling nozzle 15f. Therefore, the fiber bundle 1 in a loose false twist state is spun into a bundled fibrous yarn (bundled yarn) by a known spinning technique of generating a yarn by swirling airflows in mutually opposite directions, while the hollow guide shaft 16 is being rotated. It is discharged from the yarn discharge port 16d. Such a swirl nozzle 15f and an auxiliary nozzle 16p
The spinning state of the bundled fibrous yarn is referred to as yarn out spinning.

On the other hand, the piecing device P which is driven to the spinning unit which needs piecing and which is stopped, is driven, and the binding unit discharged from the yarn discharging port 16d of the hollow guide shaft 16 as described above. The yarn is guided to a yarn splicing portion 20 including a knotter, a splicer, and the like while being sucked into a suction pipe 19 as a yarn suction means on the spinning side. On the way to the piecing part 20 by the suction pipe 19,
The binding yarn is supplied to a nip roller 7 a constituting the yarn feeding member 7.
And the delivery roller 7b, so that the binding yarn is stably sent out. Then, the auxiliary nozzle 16p
The supply of compressed air from the compressed air supply to the
The injection of the compressed air from the auxiliary nozzle 16p into the yarn passage 16c is stopped. As a result, the swirling airflow in the hollow guide shaft body 16 disappears, the above-described spinning spinning of the binding yarn by the swirling airflows in the opposite directions ends, and the normal spinning state of the yarn Y, that is, the spinning nozzle portion 15 By the swirling airflow from the swirling nozzle 15f, the spinning of the real twist yarn is performed.

When the yarn on the spun side is passed from the suction pipe 19 of the piecing device P to the piecing portion 20, the binding yarn is
All are sucked into the suction pipe 19, and the real twisted yarn is transferred to the piecing part 20. On the other hand, in parallel with the operation by the suction pipe 19, the suction mouth 21 (the yarn suction means on the winding side) of the yarn splicing device P is driven, and the yarn end on the package 10 side is also transferred to the yarn splicing portion 20. deep. Then, after the yarn on the suction pipe 19 side and the yarn on the suction mouth 21 side are passed to the piecing portion 20, the piecing portion 20 is driven to connect both yarns, and the piecing operation is completed. become. As described above, when performing the piecing by the piecing part 20, all the binding yarns are removed in the suction pipe 19, and are spliced with the yarn on the package 10 side at the part of the real twisted yarn.

As described above, the fiber bundle 1 swirled by the spinning nozzle portion 15 is sucked, and the yarn path 1 of the hollow guide shaft 16 is sucked.
6c, the hollow guide shaft 16 is used at the time of splicing at the time of yarn cutting or splicing at the start of spinning.
The opening 16b formed at the end of the fiber bundle is provided with a means for generating a flow of air in the suction direction (the direction toward the inside of the hollow guide shaft body 16). Can be easily pulled into the hollow guide shaft body 16 and the binding yarn can be discharged from the yarn discharge port 16d of the hollow guide shaft body 16, so that it is reliable and
Quick splicing work can be performed.

The spinning nozzle 15f formed in the spinning nozzle portion 15 spins a normal yarn, and performs the hollow guide only at the time of yarn splicing at the time of yarn cutting or splicing at the start of spinning. Auxiliary nozzle 16p formed on shaft 16
, And the yarn is spun out to perform the splicing, so that the structure of the spinning device can be simplified,
As a result, the manufacturing cost of the spinning device can be reduced, and the reliability of the spinning device can be improved.

Further, only during the splicing operation at the time of yarn cutting or the splicing operation at the start of spinning, only the injection of compressed air from the auxiliary nozzle 16p formed on the hollow guide shaft 16 is stopped. Or just restart it,
The control system of the spinning device can be simplified, and therefore, the stability and reliability of the control system are improved.

Further, since the swirling airflow is generated in the hollow guide shaft body 16 in a direction opposite to the swirling airflow in the spinning nozzle portion 15, the spinning can be performed in the spinning nozzle portion 15. The bundle 1 can be formed into a thread,
It is possible to prevent the fiber bundle 1 from being cut during the piecing operation.

Further, the yarn passage 1 of the hollow guide shaft 16
6c from the opening 16b formed at the tip to the yarn discharge port 16
By forming the divergent shape toward the d side, the compressed air injected from the auxiliary nozzle 16p can be sent to the yarn discharge port 16d side, and the opening 16b side can be set to a negative pressure, so that it is easy and reliable. In addition, a suction flow can be formed in the opening 16b.

In the spinning spinning, the hollow guide shaft 16 is coupled with the swirling airflow in the spinning nozzle 15.
The fiber bundle 1 is formed into a binding yarn by the swirling airflow inside, and the binding yarn is sucked by the suction pipe 19 of the piecing device P, and the piecing portion is rotated by the downward rotation of the suction pipe 19. While being moved in the 20 direction, it is nipped by the nip roller 7a and the delivery roller 7b that constitute the yarn feeding member 7. As described above, the supply of the compressed air from the compressed air supply source to the auxiliary nozzle 16p is stopped after the binding yarn is nipped by the nip roller 7a and the delivery roller 7b, so that the yarn is sent by the yarn feeding member 7. Using the force, the spinning member S can be changed from the spinning state of the bundled yarn, that is, the yarn spinning state to the normal spinning state of the real twisted yarn. Then, after the conversion to the real twisted yarn, only the real twisted yarn is wound around the package 10 in order to splice the real twisted yarn and the real twisted yarn pulled out of the package 10.

In the embodiment described above, the hollow guide shaft 16
An example is shown in which the compressed air injected from the auxiliary nozzle 16p formed in the hollow guide shaft 16 generates a swirling airflow in the hollow guide shaft 16 in a direction opposite to the swirling airflow in the spinning nozzle unit 15. Specifically, a suction flow is formed in an opening 16b formed at the tip of the hollow guide shaft body 16, and the false flow causes the false twisted fiber bundle 1 sent near the opening 16b to pass through the opening 16b. Suctioned into the yarn passage 16c,
It is important that the yarn is discharged from the yarn discharge port 16d. Therefore, even if the formed thread-like fiber bundle 1 twisted by the swirling airflow in the spinning nozzle portion 15 is exposed to the compressed air injected from the auxiliary nozzle 16p of the hollow guide shaft 16,
While maintaining the state of the fiber bundle 1 formed in the form of a thread, the fiber bundle 1 is discharged from the thread discharge port 16 d of the hollow guide shaft body 16, is sucked by the suction pipe 19, and can be guided to the piecing section 20. If so, the airflow in the yarn passage 16c formed by the compressed air injected from the auxiliary nozzle 16p formed in the hollow guide shaft 16 is not limited to the swirling airflow, and the tip of the hollow guide shaft 16 A non-turning direct current from the opening 16b formed in the spinning nozzle 16 to the yarn discharge port 16d or a turning airflow in the same direction as the turning airflow in the spinning nozzle unit 15 may be used.

Next, referring to FIG. 6, the back roller 3, the third roller 4, the revolving nozzle 15f and the auxiliary nozzle 1 will be described.
The 6p drive timing will be described.

At the start of the normal spinning state, the draft device D including the back roller 3 and the third roller 4 that can be driven and stopped via a clutch or the like is driven, and at the same time, the turning nozzle 15f and the auxiliary nozzle 16p
Are turned on to inject compressed air from the swirl nozzle 15f and the auxiliary nozzle 16p, thereby performing the yarn feed spinning as described above. Thereafter, after a lapse of a predetermined time, the auxiliary nozzle 16p is turned off, the injection of compressed air from the auxiliary nozzle 16p is stopped, and a normal spinning, that is, a real twist spinning state is set.

When the yarn Y is cut, the back roller 3 and the third roller 4 are stopped by, for example, disengaging the clutch, and the driven third roller 4 and the second roller continuing to rotate are stopped. 5, the fiber bundle 1 is cut. Fiber bundle 1 on the cut second roller 5 side
Is generated into the yarn Y by the spinning member S and the yarn feeding member 7 which are continuing to drive, and the generated yarn Y is sucked and removed by the yarn waste suction means. After the spinning of the yarn Y by the cut fiber bundle 1 on the second roller 5 side is completed, the turning nozzle 15f is turned off and the turning nozzle 15f is turned off.
The injection of the compressed air from f is stopped. Immediately downstream of the yarn feeding member 7, there is a yarn cutting device (cutter) and a yarn waste suction means (not shown).

At the time of the piecing operation, the back roller 3 and the third roller 4 which have been stopped are re-driven, and at the same time, the turning nozzle 15f and the auxiliary nozzle 16p
Are turned on to inject compressed air from the swirl nozzle 15f and the auxiliary nozzle 16p, thereby performing the yarn feed spinning as described above. Thereafter, after a lapse of a predetermined time, the auxiliary nozzle 16p is turned off, and normal spinning, that is, a real twist spinning state is performed.

After the yarn breakage occurs, the piecing device P
The spinning unit is in a standby state until it reaches the spinning unit where the yarn break has occurred and starts the piecing operation.

In the above-described embodiment, when the yarn breaks,
The reason why the turning nozzle 15f is turned off is from the viewpoint of energy saving, and it is not always necessary to stop the turning nozzle 15f when the yarn breaks, and it may be kept on.

When the spinning is started or when the full package is replaced with an empty bobbin, the bobbin 12 on which only the yarn necessary for the splicing operation is wound is removed.
It is mounted on the bobbin holder 11.

[0045]

Since the present invention has the above-described structure, the following effects can be obtained.

Since the operation of inserting the fiber bundle into the spinning member having the spinning nozzle portion and the hollow guide shaft can be performed reliably and promptly, the success rate of piecing is improved.

In the splicing operation at the time of yarn cutting or the yarn unwinding operation at the start of spinning, the use of the swirl nozzle used for normal spinning and the auxiliary nozzle which is not operated during normal spinning allows the yarn to be spun. Since the splicing is performed, the structure of the spinning device can be simplified, and the control system of the spinning device can be simplified, so that the stability and reliability of the control system are improved.

After stopping the air flow in the hollow guide shaft,
Since the real twisted yarn spun using the swirling airflow generated in the spinning nozzle and the real twisted yarn similarly drawn from the package are spliced, only the real twisted yarn can be wound into the package. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a spinning unit constituting a spinning apparatus as an example to which a spinning method of the present invention is applied.

FIG. 2 is a side sectional view of a spinning member and the like of the spinning unit shown in FIG. 1;

FIG. 3 is an enlarged side sectional view of a main part of FIG. 2;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a schematic side view of a spinning device.

FIG. 6 is a timing chart of an example of driving / stopping a back roller and a third roller and turning on / off a swirling nozzle and an auxiliary nozzle in the spinning method of the present invention.

[Explanation of symbols]

 D Draft device S Spinning member 1 Fiber bundle 7 Thread feeder 10 Package 15 Spinning nozzle 16 Hollow guide shaft

Claims (3)

[Claims] In a normal spinning state, a real twisted yarn is spun using a swirling airflow from a swirling nozzle acting on a tip end portion of a hollow guide shaft, and at the time of a yarn unwinding operation,
In addition to the swirling airflow, a suction flow is generated at the distal end opening of the hollow guide shaft, and the fiber bundle sent near the distal end opening is sucked into the hollow guide shaft body by the suction flow. A spinning method characterized by the following. 2. In the yarn feeding operation, compressed air is jetted from an auxiliary nozzle provided in the hollow guide shaft to form an air flow in the hollow guide shaft toward the yarn discharge port, thereby performing yarn feeding spinning. 2. The method according to claim 1, wherein the air flow in the hollow guide shaft body is stopped, and then the real twist spinning using the swirling airflow by the swirling nozzle is performed continuously with the yarn feeding spinning. The spinning method according to 1. 3. After stopping the air flow in the hollow guide shaft body,
A real twisted yarn spun using the swirling airflow from the swirling nozzle and a yarn spun yarn using the swirling airflow from the swirling nozzle and the airflow from the auxiliary nozzle, and a real twisting yarn spun from the package 3. The spinning method according to claim 1, wherein: