JP3507410B2 - String-like yarn and method for producing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a false-twisted yarn obtained by false-twisting a short-fiber fleece, or a false-twisted composite obtained by adding a false-twist to a spun yarn or filament as a core in a short-fiber fleece. The present invention relates to a string-like thread formed by knitting a thread into a string-like shape, and particularly to a string-like thread in which the stitch length and the thickness of the string-like thread are uneven.

[0002]

2. Description of the Related Art Thread-like yarns include yarns belonging to twisted yarns, yarns belonging to braids, yarns such as ribbons, and yarns such as lily yarns. Some of these, such as Lilian, can give a color change.

[0003]

However, in the above-mentioned string-like thread, since the thread is supplied at a constant speed to form the string-like thread, the completed string-like thread also has a uniform thickness, As for the cloth to be woven or knitted from now on, only a flat cloth having no unevenness could be produced. On the other hand, in recent years, consumers' needs have been diversified, and a cloth having a natural uneven surface has been increasing in popularity.

The present invention has been conceived in view of the above circumstances, and an object thereof is to provide a string-like thread and a method for producing the same, which can give a natural feeling of unevenness when formed into a cloth by weaving or knitting. I am trying.

[0005]

In order to achieve the above object, a cord-like yarn of the present invention is a cord-like yarn formed by knitting a yarn containing a short fiber fleece, and has a stitch length and / or a thick yarn. It is characterized by unevenness.

Further, the yarn is a false twisted yarn formed by adding false twist to a fleece of short fibers, or the yarn is
A false twisted composite yarn having a spun yarn or filament as a core and a short fiber fleece as a sheath, or a configuration in which the unevenness is unevenness due to 1 / f fluctuation can be used.

Alternatively, it is formed by knitting a false-twisted composite yarn in which a core-only part made of spun yarn or filament and a part formed with a sheath made of fleece of short fibers around the core are alternately arranged. It is characterized by that. In this case, the alternately arranged pitch can be configured by 1 / f fluctuation.

In the method for producing a string-like yarn of the present invention, short fiber roving is supplied from a back roller of a draft part, drafted in a plurality of zones, spun as a fleece from a front roller, and the fleece is false twisted. A method for producing a cord-like yarn, which comprises a step of producing a false-twisted yarn with a knitting machine, and a step of continuously supplying the produced false-twisted yarn to a knitting machine to knit in a string shape, wherein at least one of a plurality of rollers constituting the draft part is formed. 1
It is characterized in that the speed of the roller is changed to produce a string-like yarn having uneven stitch length and / or thickness.

Alternatively, short fiber roving is fed from a back roller of a draft part, drafted in a plurality of zones and spun as a fleece from a front roller, and a spun yarn or filament serving as a core is superposed on the fleece. A method for producing a cord-like yarn having a step of false-twisting a core and a fleece to produce a false-twisted composite yarn, and a step of continuously supplying the produced false-twisted composite yarn to a knitting machine and knitting into a string-like shape. It is characterized in that the speed of at least one of the plurality of rollers constituting the draft part is changed to produce a string-like yarn having uneven stitch length and / or thickness.

The draft part is composed of a back roller, an apron roller and a front roller, and the draft between the back roller and the apron roller is kept constant to change the speeds of the both, so that the speed of the front roller is kept constant. The draft part is composed of a back roller, an apron roller and a front roller, the speed of the back roller and the apron roller is constant and the speed of the front roller is changed, and the draft part is composed of a back roller, an apron roller and a front roller. It is possible to change the speed of the back roller to keep the speed of the apron roller and the front roller constant.

Further, the draft part is composed of a back roller, an apron roller and a front roller, and the speed of the back roller is kept constant, and the draft between the apron roller and the front roller is kept constant to change the speed of both. The draft part is composed of a back roller, an apron roller and a front roller, and the draft among the rollers is kept constant to change the speed of all the rollers, or the speed change is applied according to 1 / f fluctuation. Can be

Further, the speed change of the front roller when the density of the stitch is the closest is 1, and the speed of the front roller is given in the range of 1 to 3 according to 1 / f fluctuation, or the speed of the back roller is The normal spinning time is 1
The speed of the front roller is changed in two steps and the alternation pitch thereof is changed in accordance with 1 / f fluctuation. The speed of the back roller is changed in two steps and the alternation pitch is changed to 1 / F can be changed according to the fluctuation.

Further, the back roller and the apron roller are intermittently stopped from rotating at the same time to intermittently supply the short fiber fleece, or the intermittent stop is varied according to 1 / f fluctuation. It is also possible to allow it.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view of an apparatus for producing a string-like yarn made of the false twisted composite yarn of the present invention. The device shown in the figure includes a draft part 1, a false twist part 2, a small knitting machine 3,
The winding unit 4, a drive motor 6 for these units, a motor 8 for driving the draft part 1, and a control unit 9 are included.

The draft part 1 includes a back roller 1b,
It is an apron type consisting of an apron roller 1c and a three-line roller of a front roller 1a, and is used for a draft part of an ordinary ring spinning machine. The false twist portion 2 is a portion that adds false twist to the yarn sent from the front roller 1 a of the draft part 1. The small knitting machine 3 is a small-diameter tubular knitting machine having 1 to 6 needles, and is a part for making a string-shaped yarn.

Below the false twist portion 2 and the small knitting machine 3, there are pulleys 2a and 3a, on which belts are hung, and these belts are attached to the pulleys 6b and 6c of the drive shaft 6a of the drive motor 6.
It is hung on and driven. In the present invention, these false twisted portions 2
The rotation speed of the drive motor 6 that drives the small knitting machine 3 is constant.

Behind the draft part 1, there is a roving yarn 10 formed of short fibers, from which the roving yarn 10 is supplied to the back roller 1b of the draft part 1. As the roving 10, various kinds of natural fibers such as cotton, synthetic fibers such as polyester, regenerated fibers such as cupra, or a mixture of two or more thereof can be used.

The roving 10 reaches the front roller 1a from the back roller 1b through the apron roller 1c, but since the surface speed of each roller is gradually increased, the roving 10 is between the back roller 1b and the apron roller 1c and the apron roller 1c. The draft is received in a plurality of zones between the front roller 1a and the front roller 1a to become the fleece 10a and is sent out from the front roller 1a to the false twisting portion 2.

A core 11 made of spun yarn or filament is located above and in front of the front roller 1a.
Is put on the apron roller 1c side (rear side) of the front roller 1a and overlaps the fleece 10a.

The draft part 1 is driven and rotated by the drive motor 8 and sends out the roving fleece 10a and the core 11 in an overlapping manner at the surface speed of the front roller 1a. on the other hand,
The drive motor 8 increases or decreases the rotation speed of the drive motor 8 according to a signal from the 1 / f fluctuation signal generator 9a in the control unit 9.

The back roller 1b, the apron roller 1c, and the front roller 1a of the draft part 1 are
It rotates at a constant rotation ratio by a gear train (not shown), and if the number of rotations of the drive motor 8 becomes n times, the number of rotations of each of the back roller, apron roller, and front roller will also become n times as many. become. Therefore, if the rotation speed of the drive motor 8 fluctuates with 1 / f fluctuation, the rotation speed of the front roller also fluctuates with 1 / f fluctuation.
The total draft ratio added to the roving does not change. That is, the thickness of the fleece discharged from the front roller does not change, but the spinning speed changes. Further, since the core 11 is also sent out from the front roller, the thickness of the overlapping core and fleece is constant.

The 1 / f fluctuation signal is such that when the power spectrum of a time-series signal is analyzed, the intensity of the frequency (f) is almost inversely proportional to the frequency (proportional to 1 / f),
This is related to changes in the basic rhythm of the human body, and changes similar to changes in the natural world and unevenness created by hand. From another point of view, humans get tired of receiving the same stimulus continuously, but conversely, stimuli that change too much are accompanied by discomfort, and fluctuations that appropriately combine both are 1 / It can be said that it is f fluctuation.

The 1 / f fluctuation signal can be obtained from a numerical sequence formed by calculating a predetermined number of coefficients in a random number sequence,
It can be prepared by a known method using a computer or the like (see, for example, JP-A-7-243137). The 1 / f fluctuation signal generator 9a of the device of the present invention thus forms a fluctuation signal.

The fluctuation signal generated by the 1 / f fluctuation signal generator 9a is input to the controller 9b, and the controller 9b changes the rotation speed of the motor 8 according to the fluctuation. If the rotation of the motor 8 changes, the surface speed of the front roller 1a of the draft part changes, and the speed (feed speed) of the roving fleece 10a and the core 11 spun from the front roller 1a changes.

The roving fleece 10a sent out from the front roller and the core 11 overlapping each other enter the false twist portion 2. In the false twist portion 2, the inlet side and the outlet side have the same number in opposite directions. Is added to the overlap of the fleece 10a and the core 11. That is, the twist added at the inlet side is unwound at the outlet side, and the total twist becomes zero. However, the short fiber fleece 10a is wound around the core 11 so as to be entwined as a sheath, and becomes the false twisted composite yarn 12 in a converged state.

Next, the false-twisted composite yarn 12 emerging from the false-twisted portion 2 is continuously supplied as it is to the small knitting machine 3,
Here it is knitted into a knit. Since the knitting machine is a tubular knitting machine having a small number and about 1 to 6 needles, it becomes a string-like yarn 14 thicker than the original false-twisted composite yarn 12 and wound around the winding section 4 rather than a knitted fabric. Taken.

False twisted composite yarn 1 supplied to the small knitting machine 3.
While the feeding speed of 2 changes, the hook needle of the knitting machine knits the string-like yarn 14 with a constant stroke. Here, when the supply speed is high, the stitches are large (loop length is long),
When the feeding speed is slow, the stitches are small (loop length is short).

FIG. 2 shows the knitting structure of the cord-like yarn 14 when the small knitting machine 3 has one needle. FIG. 2 (a) is a conventional string-shaped yarn 14 ', in which the false twisted composite yarn 12 is supplied with the rotation speed of the front roller 1a kept constant. as a result,
Since a large number of loops having the same size are continuously formed in a line in the longitudinal direction, the thickness of the string-like thread 14 'is constant.

FIG. 2B shows a case where the feeding speed of the false twisted composite yarn 12 of the string-like yarn 14 of the first embodiment of the present invention is changed by the 1 / f fluctuation signal. Here, the speeds of the back roller and the front roller change at the same rate of change. FIG. 2 (c) is a diagram showing fluctuation signals corresponding to the string-like threads 14, where the horizontal axis represents the length of the string-like thread, the vertical axis represents the supply speed, and the curve represents the changing state of the supply speed. There is.

The string-like yarn 14 of the present invention is a false twisted composite yarn 1
Since the feeding speed of No. 2 is changed, as shown in FIG. 2B, the stitch length is changed to a long portion A, an intermediate portion B, and a short portion C. In the portion A having a long stitch length, the feeding speed is fast, and the stitches are coarse and thin, and the stitch is soft and loose. In the portion C having a short stitch length, the feeding speed is slow, and the stitches are dense, thick and tight. The middle portion B is a stitch having the same length as the conventional example.

The relationship between the speed of the front roller and the stroke speed of the needle of the knitting machine is as follows. If the front roller speed cannot keep up with the stroke speed, thread breakage occurs. This limit speed at which yarn breakage does not occur is the minimum speed of the front roller, and the stitch length is minimum. On the other hand, when the speed of the front roller is increased, the stroke speed is constant, so that the stitch length is increased, but the excess knitting yarn is entangled, which causes trouble. The maximum speed of the front roller is the speed at which this hindrance does not occur, and the stitch length is the maximum. When actually performed, the ratio of the minimum stitch length to the maximum stitch length was about 1: 3. That is, if a change is given within this range, the stitch length can be changed based on 1 / f fluctuation in one string-like yarn 14, and the texture of the string-like yarn 14 is changed by the change. be able to.

When the string-like yarn 14 of the present invention is used for a woven fabric or a knitted fabric, it is possible to obtain a fabric which is rich in unevenness and has a partially different texture. Since the unevenness is based on 1 / f fluctuation, it becomes a natural unevenness and feels comfortable.

In the above, the 1 / f fluctuation is embodied in the stitch length. However, the stitch length is set in two steps, for example, the minimum length is 1 and the maximum length is 3, and the switching pitch between these is 1 /.
It may be changed by f fluctuation.

FIG. 3 is a view showing another embodiment of the apparatus for producing a cord-like thread according to the present invention. The same components as those in FIG. 1 are designated by the same reference numerals, and therefore different portions will be mainly described.

In this embodiment, the motor 18 does not drive the entire draft part 1, but the back roller 1b.
Drive the apron roller 1c and the front roller 1a.
Is driven by another motor not shown. Since the rotation of the motor 18 is changed by the 1 / f fluctuation signal from the control unit 9, the rotations of the back roller 1b and the apron roller 1c are changed. However, the back roller 1b and the apron roller 1
c is always rotating at the same rotation ratio, and the draft (brake draft) ratio between these rollers is kept constant.

On the other hand, since the front roller 1a is driven by a motor (not shown) and constantly rotates, the thickness of the fleece 10a spun from the front roller 1a depends on the rotation of the back roller according to the 1 / f fluctuation signal. It will change.

Here, it is preferable that the speed of the back roller does not exceed 1/10 of the speed of the front roller and the total draft does not fall below 10 times from the viewpoint of not causing draft failure.

As described above, the change in the thickness of the fleece spun from the front roller is given by the change in the roving supply speed, and the speed of the back roller during normal spinning is 1. It is suitable to vary the speed in the range of 1-5.

The spun fleece 10a passes through the false twist portion 2 and undergoes false twist, and becomes a false twist yarn 22 in which short fibers are intertwined. The false twisted yarn 22 immediately enters the small knitting machine 3 and is knitted to form a string-like yarn 24.

Since the false twisted yarn 22 is fed into the small-sized knitting machine 3 at a constant speed, the stitch length of the cord-like yarn 24 is constant. However, since the thickness of the false twisted yarn 22 has unevenness due to the 1 / f fluctuation signal, the string-like yarn 24 also has unevenness in thickness.

The controller 9 is connected to a motor that rotates the front roller 1a, and the back roller 1b and the apron roller 1c are kept constant in rotation to change the rotation of the front roller 1a to add unevenness to the fleece. You can also

FIG. 4 shows a knitting structure when the small knitting machine 3 has one needle. As a comparison, FIG. 4A shows a conventional string-like thread 14 '. FIG. 4 (b) shows a string-like thread 24 of the present invention.
The speed of the front roller is constant and the speed of the back roller is changed by the 1 / f fluctuation signal. Figure 4
(C) is a diagram showing a fluctuation signal corresponding to the string-like thread 24, the horizontal axis represents the length of the string-like thread, and the vertical axis represents the draft magnification.

When the feeding speed of the roving yarn is high, the fleece is thick with respect to the stitch, so that the loop is tight and the texture is hard. On the other hand, when the roving feed rate is slow, the fleece is thin and the stitches are loose and soft. In other words, a thick and hard portion and a thin and soft portion of the string-like thread appear as a change in 1 / f fluctuation.

When a woven fabric or a knitted fabric is produced by using such a string-like yarn 24, it is possible to obtain a fabric which is rich in unevenness and has a partially different texture. Since the unevenness is based on 1 / f fluctuation, it becomes a natural unevenness and feels comfortable.

The original false twisted yarn 22 of the string-like yarn 24
Since the short fiber fleece is false-twisted and the stitches are also false-twisted, the strength of the stitches and the non-entangled portions is low, and considering the strength when making a woven fabric or knit, the stitch length is Has a limit. The stitch length depends on the average fiber length of the fibers used in the staple fiber fleece regardless of the spun yarn or filament used as the core. The stitch length is 2 to 6 mm when the fiber is cotton, and 2 to 15 m when the worsted wool is used.
m is suitable. If a change is given within this range, the stitch length in one string-like yarn 14 changes based on 1 / f fluctuation, and the thickness and the texture of the string-like yarn 14 change due to the change. .

Although the false-twisted composite yarn 12 with the core 11 inserted therein is used in the embodiment of FIG. 1, a false-twisted yarn without the core 11 may be used. In that case, the speed of false twisting yarn is 1 /
Since it is changed based on f fluctuation, the stitch length is changed.

Further, the core 11 can be inserted in the embodiment shown in FIG. In that case, thick and thin unevenness is formed on the sheath surrounding the core 11, and as a result, a string-like thread having uneven thickness can be formed.

Further, in FIG. 3, the 1 / f fluctuation is embodied in the thickness of the false-twisted yarn, but the thickness is, for example, set in two stages with the minimum thickness being 1 and the maximum thickness being 5, and switching between them. The pitch may be changed by 1 / f fluctuation.

In the embodiment of FIG. 1, the motor 8 drives the entire draft part 1. In the embodiment of FIG. 3, the motor 18 drives the back roller 1b and the apron roller 1c, and the front roller 1a is different. The model is driven by a motor. However, these are merely examples, and a configuration in which each roller is driven by an independent motor is also possible, and the rotation speed of only one of the plurality of rollers is changed, or the back roller is kept at a constant speed and other It is also possible to add unevenness to the fleece in various ways, such as changing the two rollers at the same time or, conversely, changing the speed of the back roller while keeping the apron roller and the front roller constant.

FIG. 5 is a diagram showing a string-like thread according to another embodiment of the present invention. This is because the core 11 is inserted in the apparatus of FIG. 3 in the same manner as in FIG. 1, the supply of the fleece by the control unit 9 is controlled by the ON-OFF signal as shown in FIG. 5A, and the back roller and apron roller are controlled. Are simultaneously stopped intermittently, and the fleece is intermittently supplied to the front roller to manufacture a false-twisted composite yarn, and then the false-twisted composite yarn is knitted to form a string-like yarn 31. As shown in FIG. 5 (b), the size of the stitch is constant, but only the core 11 (the thin portion of the yarn) and the portion in which the fleece false-twisted on the core 11 is entangled as a sheath (the yarn) The thick part 3) is changed by
The string-like thread 31 in which 1a and the thin portion 31b appear alternately is formed. The pitches Q1, Q2, Q3 ... Between the thick portion 31a and the thin portion 31b also change with 1 / f fluctuation. When a woven fabric or a knitted fabric is made using such a string-like thread, it is possible to obtain a cloth which is rich in natural feeling of unevenness and has a partially different texture. In the present invention, unevenness due to 1 / f fluctuation is preferable, but the present invention is not limited to this, and it is also possible to use appropriate unevenness such as unevenness due to random changes.

[0051]

As described above, the cord-like yarn of the present invention is formed by knitting a spun yarn or a false-twisted composite yarn having a filament as a core and a short fiber as a sheath. It is a string-like yarn formed by knitting a false-twisted yarn of fleece, and since the stitch length and the thickness of the yarn are changed, the appearance and the texture are changed, and this string-like yarn is woven or knitted. When you make a cloth, the cloth has irregularities, it is rich in variety, and
You can get a partially different cloth.

If the above unevenness is formed by 1 / f fluctuation, the same unevenness as in the natural world can be obtained, and a cloth having natural unevenness can be obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing the configuration of an apparatus for producing a cord-like yarn made of false-twisted composite yarn in the first embodiment of the present invention.

2A and 2B are diagrams showing a knitting structure of a string-like yarn knitted by a knitting machine having one needle, FIG. 2A is a conventional string-like yarn, FIG. 2B is a string-like yarn manufactured by the apparatus of FIG. FIG. 3C is a diagram showing a change in speed of the front roller.

FIG. 3 is a diagram showing another configuration of an apparatus for producing a cord-like thread according to the present invention.

4A and 4B are diagrams showing a knitting structure of a string-like yarn knitted by a knitting machine having one needle, FIG. 4A is a conventional string-like yarn, FIG. c) is a diagram showing a change in the roving supply rate.

FIG. 5 is an example of a string-like yarn formed by knitting a false-twisted composite yarn including a core-only portion and a core-covered portion.
(A) is a diagram showing an ON / OFF state of the supply of the fleece, and (b) is a diagram showing a knitting structure.

[Explanation of symbols]

1 Draft Part 1a Front Roller 1b Back Roller 1c Apron Roller 3 Knitting Machine 10 Short Fiber Coarse Yarn 10a Fleece 11 Core 12 False Twisted Composite Yarn 22 False Twisted Yarn 14, 24, 31 Cord 31a Core Only Part 31b Core The part where the fleece twisted around is entwined as a sheath

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A 1-250431 (JP, A) JP-A 8-3846 (JP, A) JP-A 48-27052 (JP, A) JP-A 60- 139831 (JP, A) JP-A-7-268728 (JP, A) Actually open 60-147698 (JP, U) Actually open 4-13689 (JP, U) JP-B-40-22014 (JP, B1) Japanese Patent Publication No. 48-30023 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) D02G 1/00-3/48 D02J 1/00-13/00 D01H 7/00-7 / 92 D04B 21/00-21/20

Claims (18)

(57) [Claims] 1. Formed by adding false twist to a short fiber fleece
A string-like yarn formed by weaving yarns which are, string-like yarn, characterized in that there is uneven stitch length and / or thickness. 2. The string-like yarn according to claim 1, wherein the yarn is a false twisted composite yarn having a spun yarn or a filament as a core and a short fiber fleece as a sheath. 3. A string-like yarn according to claim 1 or 2, wherein the said unevenness is unevenness due to 1 / f fluctuation. 4. The composite yarn, wherein the composite yarn comprises a core-only part made of spun yarn or filament, and a part in which a sheath made of fleece of short fibers is formed around the core , alternately. Or knitted to form
The string-shaped thread according to item 3 . 5. A process of supplying short fiber roving from a back roller of a draft part, drafting in a plurality of zones, spinning out as a fleece from a front roller, and false twisting the fleece to produce a false twisted yarn, A method of manufacturing a string-shaped yarn, which comprises a step of continuously supplying the manufactured false-twisted yarn to a knitting machine and knitting in a string shape, wherein a speed of at least one roller of a plurality of rollers constituting the draft part is changed,
A method for producing a string-like yarn, which comprises producing a string-like yarn having uneven stitch length and / or thickness. 6. A short fiber roving is fed from a back roller of a draft part, drafted in a plurality of zones, spun as a fleece from a front roller, and a spun yarn or filament serving as a core is superposed on the fleece. A method for producing a cord-like yarn having a step of false-twisting a core and a fleece to produce a false-twisted composite yarn, and a step of continuously supplying the produced false-twisted composite yarn to a knitting machine and knitting into a string-like shape. There
A method for producing a cord-like yarn, which comprises varying the speed of at least one of the plurality of rollers constituting the draft part to produce a cord-like yarn having uneven stitch length and / or thickness. 7. The draft part comprises a back roller, an apron roller, and a front roller. The draft between the back roller and the apron roller is kept constant to change the speeds of the both, and the speed of the front roller is kept constant. The method for producing a string-like thread according to claim 5, which is characterized in that. 8. The draft part is from the back roller, an apron roller and the front roller, and the speed of the back roller and the apron roller is constant, claim 5, characterized in that varying the speed of the front roller or 6
A method for producing the string-like thread described. 9. The draft part is back roller consists apron roller and the front roller to vary the speed of the back rollers, according to claim 5 or 6, characterized in that to keep the speed of the apron roller and the front roller constant Method for manufacturing a string-shaped thread. 10. The back roller is the draft part,
7. The string-like yarn according to claim 5 , comprising an apron roller and a front roller, wherein the speed of the back roller is constant, and the draft between the apron roller and the front roller is kept constant to change both speeds. Manufacturing method. 11. The draft part is a back roller,
7. The method for producing a string-like yarn according to claim 5, comprising an apron roller and a front roller, wherein the draft between the rollers is kept constant to change the speed of all the rollers. 12. The method for manufacturing a string-like yarn according to claim 5 , wherein the change in speed is given according to 1 / f fluctuation. 13. The speed variation is given in a range of 1 to 3 in accordance with a 1 / f fluctuation, with the speed of the front roller when the density of the stitch is closest as 1. The method for producing the string-like yarn according to any one of 8, 10, and 11 . The speed of 14. The back roller, usually from 1 to at spinning as a cord-like yarn according to claim 7, 9 or 11, characterized by changing in the range of 5 Production method. 15. a two stage speed of the front roller, the production of string-like yarn according to any one of claims 8, 10 or 11, characterized in that varying the substitution pitch according 1 / f fluctuation Method. 16. The speed of the back roller and two steps, the production of string-like yarn according to claim 7, 9 or 11, characterized in that varying the substitution pitch according 1 / f fluctuation Method. 17. Stop Rotation simultaneously intermittently in the back roller and the apron roller, manufacturing method of the string-like yarn according to claim 6, wherein the intermittently performing the supply of the above short fiber fleece. 18. The method for producing a string-like yarn according to claim 17, wherein the intermittent stop is varied according to 1 / f fluctuation.