JP2001139231A - Fluff binding device and automatic winder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluff binding device capable of providing sufficient function for binding fluff and an automatic winder incorporating a mechanism for binding fluff effectively. SOLUTION: A fluff binding device 10 provided with a nozzle means 11 having a yarn passage 17 through which a spinning yarn Y passes and a hole jetting gas for causing a turning stream in the yarn passage 17 and twist setting means 12, 13 which are provided at least either of inlet and outlet of the yarn passage 17 and prevent twist applied on the spinning yarn Y by the turning stream from propagating to at least either of the inlet and outlet of the yarn passage 17 substantially is provided. Moreover, an automatic winder 1 in which this fluff binding device 10 is installed is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluff binding device provided on a traveling path of a spun yarn formed by twisting fibers, and a fluff binding device for folding down the fluff of the spun yarn, and a spun yarn wound around a yarn supplying bobbin. The present invention relates to an automatic winder capable of reducing generation of fluff when unwinding and rewinding a package.

[0002]

2. Description of the Related Art For example, a yarn supplying bobbin wound with a spun yarn produced by ring spinning is conveyed to an automatic winder. In this automatic winder, a large number of yarn supplying bobbins are removed while removing defects of the spun yarn. And wrapped in a corn or cheese-like package.

[0003] The rewinding process by this automatic winder is as follows.
This is a process of applying a tension to the spun yarn unwound from the yarn supplying bobbin and guiding the spun yarn with a number of yarn guides to form a package. Therefore, each time a spun yarn in which fibers such as short fibers are twisted passes through a tensor or a yarn guide, friction occurs, and the fluff present in the spun yarn of the yarn supplying bobbin before winding tends to increase after rewinding. .

[0004] Therefore, in the rewinding process in the conventional automatic winder, a fluff binding device is provided in the traveling path of the spun yarn to suppress the generation of fluff. This fluff binding device injects gas such as air into a yarn passage through which a spun yarn passes to generate a swirling flow, and balloons the spun yarn, so that the fluff is entangled with the fiber and wound, or untwisted and untwisted. The fluff binding treatment is performed by shaking off unnecessary fibers that do not contribute to the composition of the yarn due to ballooning at the time.

This fluff binding apparatus has a structure in which a yarn insertion opening is provided extending in the central axis direction of the yarn passage, and the yarn is inserted into the yarn passage through this opening. Also,
One guide plate that regulates the yarn path so as to press the spun yarn against the side surface of the yarn path is provided on each of the entrance side and the exit side of the yarn path. The guide plate serves as a node of vibration, and the spun yarn balloons due to the swirling flow in the yarn passage.

[0006]

However, there is a problem that the effect of lowering the fluff of the spun yarn cannot be obtained as expected even if the spun yarn is ballooned in the yarn passage by the conventional fluff binding device. Was. For this reason, it has not been possible to suppress an increase in the fluff of the spun yarn rewound by the automatic winder.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a fluff binding device capable of sufficiently exhibiting a fluff binding function. Another object of the present invention is to provide an automatic winder in which a mechanism for effectively fuzzing down is incorporated.

[0008]

A fluff binding device for solving the above-mentioned problems is a fluff binding device provided on a traveling path of a spun yarn formed by twisting fibers, and a yarn passage through which the spun yarn passes. A nozzle means having a hole for injecting gas to generate a swirling flow in the yarn passage, and provided at at least one of an inlet and an outlet of the yarn passage, and the swirling flow causes Twist preventing means for substantially stopping the applied twist from propagating beyond at least one of the inlet and the outlet. Further, the twist stopping means is provided on both sides of an inlet and an outlet of the yarn passage, and prevents the twist given to the spun yarn by the swirling flow from propagating upstream and downstream of the yarn passage. Those that substantially stop are preferred.

As a result of various experiments conducted by the present inventors, the reason why fluff binding is not sufficient simply by ballooning the spun yarn is that the twist given to the spun yarn accompanying the ballooning is caused by the upstream and downstream of the yarn passage. It turned out to be to the side. If the untwisting and false twisting of the spun yarn is performed in a short section, the fluff is entangled with the fiber and entangled,
Alternatively, it has been found that the untwisting or ballooning at the time of untwisting effectively removes unnecessary fibers that do not contribute to the composition of the yarn. Therefore, the twist stopping means for substantially stopping the twist given to the spun yarn by the swirling flow from propagating to at least one of the upstream side and the downstream side of the yarn passage effectively functions for fluff binding. . Preferably, the twist stopping means is provided on both the upstream side and the downstream side of the yarn passage. Here, substantially stopping twisting stops most of the propagation of twist applied to the spun yarn by the swirling flow, and false twisting by untwisting and additional twisting of the spun yarn occurs between the twist stopping means. To express.

[0010] In order to effectively perform such a fluff binding,
The swirling flow is formed in a direction in which twist is added to the spun yarn on the outlet side of the yarn passage. This is because, when the spun yarn is unwound by untwisting the unnecessary fibers and then the fluff is wound in by twisting, the fluff binding effect is higher than by untwisting after twisting. In this case, it is preferable to provide a twist preventing means at least on the outlet side of the yarn passage. Further, in order to cause stable ballooning of the spun yarn and to ensure that twisting is performed by the swirling flow, the twist stopping means is provided so that the spun yarn passes through the yarn passage at the entrance and the exit of the yarn passage. What holds the spun yarn so as to be located at the center of the circular cross section is preferable.

Further, in order to stop twisting without generating excessive tension on the spun yarn, the twist stopping means comprises two guide members provided at an inlet and an outlet of the yarn passage, respectively. It is preferable that the propagation of the twist is substantially stopped by two guide members. Such a twist preventing means is disposed on the side near the entrance and the exit of the yarn passage, respectively, and a first guide member for positioning the spun yarn at substantially the center of a circular cross section of the yarn passage, and a yarn guide of the yarn passage. A second guide member is provided on the side distant from the entrance and the exit, and bends the spun yarn positioned by the first guide from the center. Also,
To ensure that the spun yarn enters and exits the yarn passage, the yarn passage has an opening through which the spun yarn is inserted and extends in a direction along a central axis, and the first guide member has Having a recess fixed to a predetermined position and open to the opening side, wherein the second guide member bends the spun yarn and holds the spun yarn in the recess of the first guide;
It is preferable that the first guide be movable between a position where the spun yarn can be introduced into the concave portion and the first guide.

An automatic winder that solves the above problem is an automatic winder that unwinds a spun yarn wound around a yarn supplying bobbin and rewinds the spun yarn into a package, and is provided in a yarn path of the unwound spun yarn. A nozzle means having a yarn path and a hole for injecting a gas to generate a swirling flow in the yarn path; and a nozzle means provided at at least one of an inlet and an outlet of the yarn path. The twist applied thereto substantially stops propagating beyond at least one of the inlet and the outlet, and the spun yarn is positioned at the center of the circular cross section of the yarn passage at at least one of the inlet and the outlet. And a twist stopping means for holding the spun yarn.

[0013] Fluff generated when unwound from the yarn supplying bobbin or when passing through a tensor or the like is entangled with the fiber by untwisting and twisting in a short section of the spun yarn, or untwisted or untwisted. The fluff binding is effectively performed by shaking off unnecessary fibers that do not contribute to the yarn composition by ballooning during twisting

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a main part of an automatic winder 1 provided with a fluff binding device 10, and FIG.
FIG. 3 is a perspective view showing an exploded state of the fluff binding apparatus 10 of FIG. 1. FIG.
FIG. 4 is a top view of the fluff binding apparatus 10 of FIG.

Referring to FIGS. 1 and 2, a fluff binding device 10 is shown.
Comprises a central nozzle means 11, a twist-stopping means 12 provided on the inlet side of the nozzle means 11, and a twist-stopping means 13 provided on the outlet side of the nozzle means 11.

In FIG. 2 and FIG.
Comprises a ceramic body 15 and a holder 16 into which the body 15 is fitted. The main body 15 has a yarn passage 17 formed in a through-hole having a circular cross section, and is opened substantially in the middle of the yarn passage 17 in the direction of the central axis 171. And a hole 18.
Preferably, two or more gas injection holes 18 are provided as shown. By injecting the compressed gas from the holes 18, a swirling flow 19 is formed along the circumference of the circular cross section of the yarn passage 17. The gas injected from the hole 18 is usually compressed air.

The yarn passage 17 has a slit-shaped opening 20 extending in a direction along the central axis 171 thereof. Since the opening 20 is opened in a tangential direction opposite to the direction of the swirling flow 19, the spun yarn Y ballooned by the swirling flow 19 does not jump out of the opening 20. Further, since the inclined surface 201 spreading in a fan shape is formed following the opening 20, the spun yarn Y
Passes through the opening 20 after passing through the inclined surface 201, and the yarn passage 17
Inserted securely into Further, as clearly shown in FIG. 3, a gas passage 21 reaching the hole 18 is appropriately formed in the main body 15 and the holder 16.

In FIG. 2, the twist preventing means 12 on the inlet side is shown.
Is composed of a first guide member 25 and a second guide member 26 provided near the entrance of the yarn passage 17. Like the twist-stopping means 12 on the inlet side, the twist-stopping means 13 on the outlet side also includes a first guide member 27 and a second guide member 28 provided close to the outlet of the yarn passage 17.
Note that the first guide members 25 and 27 and the second guide member 2
The portion of 6, 28 which comes into contact with the spun yarn is formed of ceramics.

The first guide members 25 and 27 are connected to the yarn passage 17.
The plate member is disposed on the side near the entrance or exit of the holder 16 and is fixed to predetermined positions above and below the holder 16 by bending portions 252 and 272. The first guide members 25 and 27 have V-shaped concave portions 251 and 271 opened toward the opening 20. As shown in FIG. 4, the bottoms of the concave portions 251 and 271 are located near the central axis 171 of the yarn passage 17 (center portion).

The second guide members 26 and 28 are connected to the yarn passage 17.
Is a plate material that is arranged on the side remote from the entrance or exit and is separated from the first guide members 25 and 27 by a predetermined distance, and is integrally fixed to the lever 29 as shown in FIG. The lever 29 can pivot around a shaft 30. As shown in FIG. 2, when the second guide members 26 and 28 are in the operating position, the spun yarn Y is moved to the first position.
The guide members 25, 27 are held at the bottoms of the concave portions 251, 271 of the guide members 25, 27 and are bent so as to deviate from the central shaft 171. As shown in FIG. 1, when the lever 29 for fixing the second guide members 26 and 28 turns as shown by a two-dot chain line, the second guide members 26 and 28 are opened by the opening 20 of the thread passage 17 and the first guide members 25 and 27. It is a retreat position where the yarn can be introduced into the concave portions 251 and 271.

The operation of the fluff binding apparatus 10 having the above-described structure will be described with reference to FIGS. FIG. 5 is a side cross-sectional view of the fluff binding apparatus 10 of FIG. 1 in which the second guide members 26 and 28 are in the retracted position, and FIG. 6 is a view in which the second guide members 26 and 28 are in the operating position. 1 fluff binding device 10
It is sectional drawing of the side surface of FIG.

In FIG. 5, the second guide members 26, 28
Is in the retracted position, the two-dot chain line spun yarn Y is introduced into the yarn passage 17 from the front surface of the fluff binding device 10 through the inclined portion 201 and the opening 20 as shown by the arrow. The spun yarn Y in the yarn passage 17 is located at the bottom of the concave portions 251 and 271 of the first guide members 25 and 27. Normally, when the spun yarn Y is introduced, the spun yarn Y does not travel and the gas is not injected from the holes 18.

In FIG. 6, the second guide members 26, 28
Is the operating position shown in the drawing, and the gas is similarly ejected from the hole 18 to generate a swirling flow in the yarn passage 17. Subsequently, the spun yarn Y is caused to travel from bottom to top as indicated by the arrow. Spun yarn Y
Starts ballooning as illustrated with the bottoms of the recesses 251 and 271 of the first guide members 25 and 27 as nodes. Second
The guide members 26 and 28 move the spun yarn Y into the concave portions 251 and 27.
Since the spun yarn Y is bent in the direction of being further pushed into the bottom of the first spout 1, the spun yarn Y is held at the bottoms of the concave portions 251, 271 and
When the spun yarn Y is bent by the first guide members 25 and 27 and the second guide members 26 and 28, the yarn passage 17 is formed.
The propagation of the twist of the spun yarn Y applied in the first guide member 2
5, 27 and the second guide members 26, 28.

Since the spun yarn Y is held at the center of the yarn passage 17, the ballooning of the spun yarn Y is uniform and stable. With this ballooning, the spun yarn Y is twisted. The spun yarn Y is formed by twisting short fibers or the like, and for example, has a twist in the Z direction as shown in the drawing. The direction of the swirling flow 19 is preferably a direction in which a twisting is formed on the spun yarn Y on the outlet side of the yarn passage and a untwist is formed on the spun yarn Y on the inlet side of the yarn passage. False twisting of the untwisted portion and the additional twisted portion of the spun yarn Y is as follows:
Guide members 25, 26, 2 at the entrance and exit of the yarn passage 17
The guide members 25, 27
Is limited to In the untwisting portion, unnecessary fibers that do not contribute to the configuration of the yarn are shaken off, and in the additional twisting portion, it is assumed that fluff is involved. The fluff binding action of the untwisted portion and the additional twisted portion is caused by the guide members 25 and 2.
This is effectively performed by the twist stopping by 6, 27, 28.

The spun yarn Y formed by the second guide members 26 and 28
When the degree of bending is small, the ballooning of the spun yarn Y is the same,
, And the distinction between the twisted portion and the untwisted portion in the yarn passage 17 becomes unclear. Therefore, the fluff binding action of the untwisted portion and the additional twisted portion becomes insufficient. On the other hand, if the bend is too large, the yarn tension becomes too large, which may cause the yarn to break. First guide members 25 and 27 and second guide members
The degree of twist prevention by the guide members 26 and 28 can be adjusted by the pushing amount of the second guide members 26 and 28 and the like. In FIG. 1, by changing the length of the stopper 31 attached to the lever 29, it is possible to set an appropriate pushing amount to stop the propagation of the twist of the spun yarn Y.

The twist preventing means 12 is provided only on the inlet side of the nozzle means 11 and the twist preventing means 13 on the outlet side is not provided, or the twist preventing means 13 is provided only on the outlet side of the nozzle means 11, The twist applied to the spun yarn Y by the swirling flow 19 propagates over at least one of the inlet and the outlet of the nozzle means 12 even if the twisting means 12 on the side is not provided. Can be stopped. As a result, one of the twisting and the untwisting of the spun yarn Y is performed in a short section, and the fluff is entangled or the unnecessary fibers are shaken off effectively. When the swirling flow 19 is in a direction in which twist is added to the spun yarn Y on the outlet side of the yarn passage 17,
If the twist preventing means 13 is provided on the outlet side of the nozzle means 11, the fluff after the unnecessary fibers are shaken out is effectively taken in. However, it is preferable to provide the twist preventing means 12 and 13 at the inlet and the outlet of the nozzle means 11 because both the entrainment of fluff and the shaking of unnecessary fibers are effective in suppressing fluff.

Further, regarding the direction of the twist applied to the spun yarn Y,
It is also possible to form a twisted portion on the inlet side of the yarn passage 17 and form an untwisted portion on the outlet side of the yarn passage 17. However, it is preferable to form a twisted portion on the outlet side of the yarn passage 17 because the fluff is entangled subsequent to the unnecessary fluttering, so that fluff binding is ensured.

The spun yarn Y can be held at a position eccentric from the center of the yarn passage 17 with respect to the holding position. However, when the spun yarn Y is held in the vicinity (center portion) of the yarn passage 17, the ballooning of the yarn becomes a symmetrical shape with nodes along the central axis and is stabilized.

Various means can be adopted as the means for preventing the spun yarn Y from being twisted. A means for holding the spun yarn Y by abutting two plates, or a gate means for pushing a single plate between the two plates and bending the spun yarn Y in a zigzag shape may be used. However, as shown in FIG. 6, when the twisting means is provided by the two guide members 25, 26 or 27, 28, the generation of the yarn tension on the spun yarn Y is reduced, and the twisting can be stopped. This is advantageous in that generation can be reduced.

Further, the recesses 251 and 251 for holding the spun yarn Y
The first guide members 25, 27 having
By allowing the guide members 26 and 28 to move toward the recesses 251 and 271, the opening 2
The second guide members 26 and 28 do not hinder the introduction of the spun yarn Y that has passed through 0, and the first guide members 25 and 27 also reliably hold the spun yarn Y.

Next, an automatic winder 1 provided with the fluff binding device 10 shown in FIG. 1 will be described with reference to FIG. The automatic winder 1 is formed by arranging a number of weight winding units 2 in parallel. Each of these winding units 2 feeds a spun yarn Y unwound from a yarn feeding bobbin 3 supplied to a predetermined position to a balloon breaker 51, a tensioner 52 for applying yarn tension, a fluff binding device 10, and a yarn feeding at the time of yarn breakage. A package that is rotated by a traverse drum 56 after passing through a suction nozzle 53 for holding a yarn end (lower yarn) on the bobbin side, a slab catcher 54 for detecting a defective portion of the spun yarn Y, a yarn splicing device 55, and the like. 57. A suction mouth 5 for guiding the yarn end of the package 4 to the yarn joining device 55.
7 and a relay pipe 58 for guiding the lower thread from the yarn supplying bobbin 3 to the yarn joining device 55 are provided above and below the yarn joining device 55.

As shown in FIG. 1, the tensor 52, the fluff binding device 10 and the suction nozzle 53 are mounted on the side surface of a tensor box 59. The tensor 52 is of a gate type in which a movable comb blade 522 is freely meshed with a fixed comb blade 521. The movable comb blade 522 is attached to the tip of the arm 523, and the arm 523 is attached to the shaft 60 that works with the shaft 30. Therefore, the second guide member 2 of the fluff binding device 10
The opening and closing operations of the comb blades 522 of the tensor 52 are performed at the same time.

In FIG. 7, when the traverse drum 56 of each winding unit 2 is driven to start the rewinding of the spun yarn Y, the spun yarn Y unwound from the yarn supplying bobbin 3 passes through the fluff binding device 10. An effective fluff binding process is performed by the twist preventing means 12 and 13 having the above-described functions. If a defect is found in the spun yarn Y being wound on the package 4, the yarn must be cut and spliced.
At this time, the injection of gas in the fluff binding device 10 is stopped, and the yarn end on the yarn supplying bobbin side is sucked and captured by the suction nozzle 53. Then, the relay pipe 58 is turned to the vicinity of the balloon breaker 51 and the suction nozzle 53 is turned.
The lower thread caught by the above is sucked and guided to the yarn joining device 55. At this time, the tensor 52 of the tensor box 59 and the fluff binding device 10 are in an open state, and the spun yarn Y can take the illustrated yarn traveling path. At the same time, the yarn end on the package 4 side is sucked by the suction mouth 57 and guided to the yarn joining device 55, so that the yarn joining device 55 executes the yarn joining. When the piecing is completed, the respective devices of the tensor box 59 are activated, and winding of the spun yarn Y with the fluff binding process is started.

When the yarn supplying bobbin 3 is unwound,
Generated at the time of applying a tension in the fuzz wrapping device 10
This allows the spun yarn Y to be rewound while suppressing the generation of fluff.

If the suction nozzle 53 is arranged near the exit of the fluff binding device 10, the fluff binding device 10
It is also possible to collect fluff coming out without scattering. In addition, a waxing device for applying wax to the spun yarn can be provided downstream (upper) of the fluff binding device 10.
If a space for disposing the fluff binding device 10 cannot be secured by providing the waxing device, the fluff binding device 10 can be disposed upstream (downward) of the tensor 52. However, it is preferable to provide the fluff binding device 10 on the downstream side of the tensor 25 because fluff generated by the tensor 52 can be suppressed.

In addition to the compressed air, humidified air containing steam or water droplets can be used as the gas for generating the swirling flow for twisting the spun yarn Y in which the short fibers are twisted. When steam is used, the spun yarn Y passing through the yarn passage 17 and the inner periphery of the yarn passage 17 can be heated.
The heat setting can be performed in a state similar to ironing by contact with the inner periphery and maintaining a form with less fluff. Also,
The fluff of the spun yarn Y can be softened by exposing it to humidified air or steam. As a result, the spun yarn Y twisted in the yarn passage 17 can be effectively entangled with the fibers by the fluff softened by false twisting by untwisting and twirling, and can be wound. Further, dry heated air may be used as the gas that causes the swirling flow.

[0037]

The fluff binding apparatus and the automatic winder of the present invention have the following effects by having the above-described configuration. The twist-stopping means substantially prevents the twist given to the spun yarn by the swirling flow from propagating to the upstream side and the downstream side of the yarn passage. Is performed in a short section. As a result, the fluff is entangled with the fiber and wound up, or unnecessary fibers that do not contribute to the composition of the yarn due to untwisting or ballooning at the time of untwisting are effectively shaken off, and the fluff generated in the rewinding process of the spun yarn. Can be suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of an automatic winder provided with a fluff binding device.

FIG. 2 is a perspective view showing an exploded state of the fluff binding apparatus of FIG.

FIG. 3 is a sectional view of nozzle means of the fluff binding apparatus of FIG. 1;

FIG. 4 is a top view of the fluff binding apparatus of FIG. 1;

5 is a side sectional view of the fluff binding apparatus of FIG. 1 in which a second guide member is at a retracted position.

FIG. 6 is a side cross-sectional view of the fluff binding apparatus of FIG. 1 in which a second guide member is in an operating position.

FIG. 7 is an equipment layout diagram of an automatic winder in which the fluff binding apparatus of FIG. 1 is installed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic winder 2 Winding unit 3 Yarn supplying bobbin 4 Package 10 Fluff binding device 11 Nozzle means 12 Twist stop means 13 Twist stop means 17 Thread passage 171 Center shaft 18 Hole 19 Swirling flow 20 Opening 25 First guide member 251 on the inlet side Concave part 26 Second guide member on the entrance side 27 First guide member on the exit side 271 Concave part 28 Second guide member on the exit side Y Spun yarn

Claims (9)

[Claims] 1. A fluff binding device provided on a traveling path of a spun yarn formed by twisting fibers, comprising: a yarn passage through which the spun yarn passes; and a swirl flow in the yarn passage. A nozzle means having a hole for injecting gas, provided at at least one of an inlet and an outlet of the yarn passage, and a twist given to the spun yarn by the swirling flow exceeds at least one of the inlet and the outlet. And a twist preventing means for substantially stopping the propagation. 2. The fluff binding device according to claim 1, wherein the swirling flow is formed in a direction in which twist is added to the spun yarn at an outlet side of the yarn passage. 3. The twist-preventing means is provided at an outlet of the yarn passage, and substantially prevents the additional twist given to the spun yarn by the swirling flow from propagating downstream of the yarn passage. 3. The fluff binding device according to claim 2, wherein the device is stopped. 4. The twist stopping means is provided on both sides of an inlet and an outlet of the yarn passage, and twists applied to the spun yarn by the swirling flow propagate to an upstream side and a downstream side of the yarn passage. The fluff binding device according to claim 1 or 2, wherein the fluffing is substantially stopped. 5. The twist stopping means holds the spun yarn at the entrance and the exit of the yarn passage so that the spun yarn is located at the center of the circular cross section of the yarn passage.
A fluff binding device as described in the above. 6. The twist stopping means comprises two guide members provided at an inlet and an outlet of the yarn passage respectively, and the two guide members substantially stop the propagation of the twist. The fluff binding device according to claim 4. 7. A first guide member disposed on a side near an entrance and an exit of the yarn passage, and a first guide member for positioning the spun yarn substantially at a center of a circular cross section of the yarn passage. The fluff binding device according to claim 4 or 5, further comprising a second guide member disposed on a side of the yarn passage apart from the entrance and the exit, and bending the spun yarn positioned by the first guide from the central portion. . 8. The yarn passage has an opening for inserting the spun yarn and extending in a direction along a central axis, the first guide member is fixed at a predetermined position, and The second guide member has a concave portion opened to the opening side, and the second guide member bends the spun yarn and introduces the spun yarn into the concave portion of the first guide while holding the spun yarn in the concave portion of the first guide. The fluff binding device according to claim 7, wherein the fluff binding device is movable between a position where the fluffing is enabled. 9. An automatic winder, which unwinds a spun yarn wound around a yarn supplying bobbin and rewinds it into a package, comprising: a yarn passage provided in a yarn path of an unwound spun yarn; A nozzle means having a hole for injecting a gas to generate a swirling flow, and a twist provided on at least one of an inlet and an outlet of the yarn passage, and the twist given to the spun yarn by the swirling flow is provided at the inlet. And at least one of the inlet and the outlet, and holds the spun yarn so that the spun yarn is located at the center of the circular cross section of the yarn passage. An automatic winder comprising: twisting means.