JPH1121729A - Production of spun yarn, spinning frame and fluff-controlling apparatus for spinning frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a process for producing a ring spun yarn effective for suppressing the generation of fluffs on the ring spun yarn and increasing the yarn strength and provide a fluff-controlling apparatus, etc. SOLUTION: A D-formed rotor 22 made of a highly frictional material and having a curved face 22b symmetrical about the rotational axis and an S-formed rotor 23 made of a highly frictional material and having a curved hourglass face 23b symmetrical about the rotational axis are attached to a rotor case 21. A guide nose 21b is also formed on the rotor case 21. The curved face 22b and the curved hourglass face 23b are arranged in such a manner as to allow the eccentric contact of the twisting yarn (b) spun from a front roller with the curved face 22b and the curved hourglass face 23b to apply false-twist to the yarn twisted with the curved faces. The twist reaches the fleece (c) pressed with the guide nose 21b, a hard twist is applied to the fleece (c) by the original twist and the false twist with the rotor and the end of the fiber is wound up to suppress the generation of fluffs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a spun yarn using a ring spinning machine or the like, and more particularly to so-called migration, in which the constituent fibers of the yarn transfer between the inner and outer layers of the yarn in response to the twisting action. The present invention relates to a technique for amplifying the action and obtaining a high-quality spun yarn without fluff.

[0002]

2. Description of the Related Art A conventional ring spinning machine has a mechanism for drafting a supplied roving yarn, a twisting mechanism by the action of a spindle and a traveler rotating along with the roving yarn, and a spun and twisted yarn integrated with a spindle. And a cup molding mechanism that winds up a bobbin that rotates.

[0003] In the part where the fleece spun from the front roller through the draft part is twisted, the fibers on both sides of the fleece and the fiber ends wound up by the rubber roller,
The yarn was not twisted into the ring spun yarn and a large number of fluffs were generated on the yarn. Such fluff not only impairs the appearance of the yarn, but also causes the single-fiber strength to decrease because the fluffed fiber ends do not contribute to the strength of the yarn at all. Furthermore, the fiber ends that protrude long as fluff may come off or break due to frictional resistance between the yarn guide and the various yarn guides that repeatedly pass in the post-spinning process such as the winder process. Floating in the air, polluting the environment of textile factories. In addition, such floating wool is
They could form clumps and adhere to textiles, which could be a drawback of the product, which was a major cause of quality deterioration.

FIG. 9A is a side view showing a main part of a conventional ring spinning machine, and FIG. 9B is an enlarged view of a front roller portion. The roving yarn a supplied from the tram pet 1 is subjected to a brake draft action between the back roller 2 and the second roller 3 and a main draft action between the second roller 3 and the front roller 4, and the fibers are arranged in parallel. Then, it is spun from the front roller 4 as a flat ribbon-shaped fleece.

On the other hand, the twisting action generated by the action of the spindle 5 rotating at high speed, the ring 6 and the traveler 7 is twisted to the fleece spun portion of the front roller 4 via the snare wire 8 serving as a guide, thereby forming a ribbon-shaped. The fleece is twisted to make a ring spun yarn b '. The spun yarn b 'is fitted on a spindle 5 and bobbin 5' rotating integrally with the spindle.
It is wound up. Reference numeral 9 denotes a flute for preventing the fleece from being scattered by suction when the yarn b 'is cut.

At this time, as shown in FIG. 9B, a difference is provided between the inclination angle of the draft device and the inclination angle of the ring spun yarn b 'so that the angle α can be obtained. This is because the non-twisted portion “fleece angle” along the front roller 4 on the bottom side is obtained in order to obtain a “migration” effect in which the constituent fibers of the yarn transfer between the inner layer and the outer layer of the yarn in response to the twisting action described above. It is intended to be formed. That is, this makes it easier to wind the ends of the constituent fibers of the yarn into the inside of the ring spun yarn, thereby suppressing the generation of fluff.

As shown in FIGS. 9B and 10, the fleece contacts the bottom front roller 4 at the fleece angle α, and the nip side of the front roller of the fleece c is completely twisted. While not hanging
On the spindle side, a substantially triangular fleece c having a twisted twisted portion as a vertex.

That is, the spun fleece c is caught at the vertex of this triangle just as when twisting a “koyori”. It is an important design element of the spinning machine. When the angle α is small, the non-twist zone becomes small, the fluff of the yarn increases, and at the same time, the strength of the yarn decreases. Conversely, when the fleece angle α becomes large and the portion of the “no-twist zone” becomes longer, yarn breakage increases. Therefore, in consideration of the both, usually, the value of α has been appropriately set to around 20 °.

[0009] The various migration patterns thus obtained are also important factors for increasing or decreasing the breaking strength of the yarn as a twisted structure. Ring spinning still survives as the mainstream of spinning, as opposed to various innovative spinning machines such as open-end spinning, air spinning, and friction spinning. It can be said that there is an excellent yarn structure due to the effect of the migration effect. For example, if the ring yarn is a rope, the yarns of various innovative spinning machines may be considered to have a chain-like structure.

[0010]

However, in the conventional ring spinning machine, the fleece angle α was only about 20 °, so that the completed ring spun yarn b ′ had a large number of fluff as shown in FIG. d was done. further,
In FIG. 9, in the ring spinning machine, since the ring rail 6 'gradually rises from the start of winding of the yarn to the full tube, the distance H between the ring 6 and the front roller 4 changes gradually, and the fleece angle α also increases. It was unavoidable that the fuzz d of the ring spun yarn b ′ thus changed fluctuated and the strength decreased.

The present invention has been conceived in view of the above facts. The present invention relates to a method for producing a spun yarn capable of suppressing the generation of fluff in a spun yarn and increasing the strength of a single yarn, a spinning machine, and a method for a spinning machine. The purpose is to provide a fluff control device.

[0012]

In order to achieve the above object, a method for producing a spun yarn according to the present invention is a method for producing a spun yarn in which a fleece spun from a front roller via a draft part is twisted and wound. In the fleece spun from the front roller and not twisted, a guide nose is provided at the boundary between the twisted portion that is twisted, and the fleece is lightly pressed by the guide nose to form the fleece. It is characterized by facilitating the winding of the front end and the rear end.

[0013] Alternatively, in a method for producing a spun yarn in which a fleece spun from a front roller through a draft part is twisted and wound, a yarn spun from the front roller is passed over a curved surface, and the curved surface is rotated. It is characterized in that false twist is given to the yarn by the frictional force between the curved surface and the yarn.

The curved surface is rotated by a frictional force with a passing yarn, or a guide is formed at a boundary between a fleece spun from the front roller and untwisted and a twisted portion twisted up. A nose may be provided so that the guide nose facilitates the winding of the leading and trailing ends of the fibers constituting the fleece.

Further, a flute may be made to pass through the curved surface a plurality of times, or a flute may be arranged below the front roller, and the leading end and the trailing end of the fiber near the guide nose may be drawn by the air flow of the flute into the twisted portion. It can also be guided inside.

A spinning machine according to the present invention is a spinning machine in which a fleece spun from a front roller through a draft part is twisted and wound, and a flute is provided below the front roller and spun from the front roller. A guide nose is provided at the boundary between the non-twisted fleece and the twisted twisted portion.

Alternatively, in a spinning machine in which a fleece spun from a front roller via a draft part is twisted and wound, a curved surface having a rotation axis and having a symmetric shape with respect to the rotation axis is provided near the front roller. The present invention is characterized in that a D-shaped rotor made of a high friction material is provided, and the D-shaped rotor is arranged such that the yarn being twisted eccentrically contacts the curved surface.

Alternatively, in a spinning machine in which a fleece spun from a front roller through a draft part is twisted and wound, an S-shaped rotor having a drum-shaped curved surface made of a high friction material is rotatably provided near the front roller. Provided,
The S-shaped rotor is characterized in that the S-shaped rotor is arranged such that the yarn is eccentrically contacted with the drum-shaped curved surface in an S shape. It is desirable that the twisted yarn be in contact with any of the above-mentioned guide nose, D-type or S-type rotor to increase the fleece angle.

The fluff controller for a spinning machine according to the present invention has a case arranged near the front roller of the spinning machine, and a guide nose formed on the yarn inlet side of the case. Is characterized in that the leading end and the trailing end of the fiber constituting the fiber are promoted to be wound.

Alternatively, a D-type rotor comprising a rotor case disposed near a front roller of a spinning machine and a high friction material rotatably supported in the rotor case and having a curved surface symmetrical with respect to a rotation axis. And an S-shaped rotor rotatably supported in the rotor case and having a drum-shaped curved surface made of a high friction material. The yarn spun from the front roller and being twisted is formed of the D-shaped rotor. The D-type rotor and the S-type rotor are arranged such that the eccentric contact is made with the curved surface, and the yarn passing through the D-type rotor is eccentrically contacted with the S-shaped rotor in an S-shape. A guide nose is formed at the inlet side of the fiber, and the guide nose facilitates the winding of the leading end and the trailing end of the fiber constituting the fleece.

A magnet for attracting the front roller to the case or the rotor case, and a case for movably supporting the case or the rotor case between a use position close to the front roller and a retracted position separated from the front roller; It is desirable to adopt a configuration provided with a holding device. Further, the case holding device may be configured to position the rotor case at a predetermined position by the tension of the roving supplied to the spinning machine.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a main part of a ring spinning machine equipped with a fluff controller A1 according to a first embodiment of the present invention. The same reference numerals are given to the same components as those in the related art,
Description is omitted.

The fluff control device A1 comprises a plastic case 10 mounted on the front of the front roller 4,
The case holding device 11 supports the case 10. The case holding device 11 includes a T-shaped frame 12 and an arm 13. A guide nose 10b is formed at the yarn inlet of the case 10. The case holding device 11 such as the T-shaped frame 12 and the arm 13 will be described in the second embodiment. First, the description will begin with the guide nose 10b.

FIG. 2 is a perspective view of the case 10. As shown in FIG. 1, the case 10 is a box-shaped part whose side facing the front roller 4 is opened, and an inlet side opening part 10a into which the ring spun yarn b enters, and a guide nose 1 formed at this inlet.
0b and the groove 1 for the arm 13 of the case holding device 11
0c and a screw hole 10d. In the lower part of the case 10, an outlet opening part 10e serving as an outlet of the ring spun yarn b is formed. The left and right contact surfaces 10f with the front roller 4 are arcuate surfaces having substantially the same curvature as the front roller 4, and a button-shaped magnet 14 is fixed to this surface by bonding or the like.

The guide nose 10b is a plate-shaped member formed by using the outer wall of the entrance portion of the case 10. When the case 10 is attracted to the front roller 4 by the magnet 14,
Cross-hatched P on the tip surface of the guide nose 10b
The portion makes light contact with the surface of the front roller 4.

FIGS. 3A and 3B show the guide nose 10b.
FIG. 3 is a diagram showing a state where the contact is made with the front roller 4. That is, when the case 10 is attracted to the surface of the front roller 4 by the magnet 14, the P portion of the guide nose 10b covers the fleece c, and the gap between the P portion and the front roller 4 is about half of the fleece c (in the width direction). ).

As shown in FIG. 3B, the guide nose 1
The upper and lower ends of 0b are arc-shaped, so that the fleece c smoothly enters the P portion from above, and the twist can be raised from below, although the twist is being restricted.
Twist coming up from spindle side is guide nose 1
While being limited by 0b, a flat ribbon-shaped fleece c pressed under the guide nose is formed from the end of the fleece c while being continuously wound as if twisting a twist.

As described above, since the guide nose 10b gently sandwiches the fleece c between the guide roller and the front roller 4 to limit the rise in twist, the length of the fleece c is increased, and the fleece angle α is increased. If the fleece angle α is large, migration is promoted, and the end of the fiber is easily entangled in the yarn b, and a yarn with less fluff is produced.

As described below, the guide nose 10b can further promote the migration under the action of the airflow. A flute 9 (see FIG. 1) is provided below the front roller 4, and always sucks the surrounding air from a hole formed facing the fleece. Also, since the front roller 4 is rotating,
This also generates an airflow around the roller. As a result, an airflow as shown by an arrow in FIG. 3A is formed in the space between the front roller 4 and the case 10.

The leading and trailing ends of the fiber on the left side of the fleece c are
By the action of the airflow flowing along the wall surface at the tip of the guide nose 10b, it is continuously guided to the center of the fleece twist. On the other hand, the fiber on the right side of the fleece, along the semicircular tip of the guide nose, has an air current flowing from the right to the left in the figure at the bottom of the nose, so that both ends of the fiber are at the twist points. It is actively guided toward the center and gets involved.

As described above, the shape of the guide nose 10b
Due to the appropriate positional relationship with the fleece and the effect of the air current flowing in an arc along the semicircular shape at the tip of the guide nose, the left and right fiber ends are effectively guided to the center of the twist and at the same time The fleece holding action of the guide nose prevents the tip of some fibers from adhering to the front top roller and winding up, or preventing it from adhering to the front bottom roller and detaching from the fleece and being sucked into the flute. In addition, the migration effect is further ensured.

FIGS. 4 to 8 show a second embodiment of the present invention. In this example, in addition to the action of the guide nose, by giving a strong false twist to the spun yarn being twisted, the fleece angle, which was limited to around 20 °, was not increased. Can be greatly increased to 50 °.

FIG. 4 is a perspective view showing the state of use of the fluff controller A2, and FIG. 5 is an exploded perspective view thereof. As shown in these figures, the fluff control device A2 includes the rotor case 2
1, a D-type rotor 22, an S-type rotor 23, and a case holding device 11.

The rotor case 21 has the D-type rotor 22 and the S-type rotor 23 attached to the case 10 described in the first embodiment, and has a common basic configuration such as a box shape. Although the description slightly overlaps with that of the case 10, it will be described below. The rotor case 21 is a plastic box type, and has an inlet-side opening 21a into which the ring spun yarn b enters.
And a guide nose 21b formed at the entrance, a mounting portion 21c for the D-type rotor 22, an inclined mounting portion 21d for mounting the S-type rotor 23, and a groove 21e for connection with the arm 13. The contact surface 21f with the front roller 4 is an arc surface having substantially the same curvature as the front roller 4, and the button-shaped magnet 14 is fixed to this surface. Further, a viewing window 21g is formed in the rotor case 21 so that the inside can be checked.

The D-type rotor 22 is rotatably fixed to the rotor case 21 by a locking member 28 integrally with the rotating shaft 22a, and the S-shaped rotor is also formed on the rotor case by the locking member 27. It is fixed to the mounting seat 21d.

The case holding device 11 includes a T-shaped frame 12
And an arm 13. The T-shaped frame 12 is supported by the draft part by placing a slightly horizontal bar portion 12b of the T-shaped vertical bar portion 12a on a ten server (not shown) provided adjacent to the second roller 3. T-shaped frame 12
Grooves 12c, 12c formed on both sides of the horizontal bar 12b are passages for the roving a. As the roving a passes therethrough, the T-shaped frame is moved right and left by the tension of the roving, so that the T-shaped frame can always move in accordance with the traverse of the roving a. At the tip of the vertical bar portion 12a of the T-shaped frame, two pins 12d, 12d are erected close to each other,
Here, the arm 13 is fitted and rotatably supported.

The two arms are made of flexible plastic such as synthetic rubber, and are attached to each other in opposite directions.
Each tip is inserted into the groove 21e of the rotor case 21 and fixed from above by a locking member 16 made of a screw and a washer (only one rotor case is shown in the figure). Since the arm 13 is rotatably attached to the T-shaped frame 12, the rotor case 21 is also rotatable with respect to the T-shaped frame 12, and the front roller 4 shown in FIG.
, And a retracted position that is moved away from the front roller by moving in the direction of the arrow r. Further, since the arm 13 is flexible, when the case 10 or the rotor case 21 is attracted to the front roller 4, even if the centering of the case and the arm is slightly out of alignment, the arm 13 can be deformed to absorb the out of alignment.

Next, the principle of false twisting of the present invention will be described. FIG. 6 is a diagram for explaining the principle of false twisting using a D-type rotor. The D-shaped rotor 22 has a curved surface 22 b (spherical surface in the illustrated embodiment) symmetrical with respect to the rotation axis at the tip of the rotation shaft 22 a, and is arranged with the curved surface 22 b facing the vicinity of the front roller 4. . The D-shaped rotor 22 is entirely or at least a curved surface 22b formed of a material having high friction and elasticity (for example, various synthetic rubbers such as natural rubber, silicon rubber, urethane rubber, and the like). . The curved surface 22b of the D-shaped rotor 22 having such a configuration
The ring-spun yarn b being twisted and spun from the front roller 4 is brought into contact therewith.

The ring spun yarn b and the curved surface 22b are shown in FIG.
As shown in FIG. 6A, eccentric contact is made so as not to pass through the center O of the curved surface, and contact is made only on one side of the center O as shown in FIG. The ring spun yarn b travels in the direction of the arrow at the same time as being twisted and is wound on a bobbin 5 ′ integrated with the spindle 5 shown in FIG. 1. Thus, a rotational force is applied by friction, and the rotation is performed about the rotation shaft 22a.

Since the curved surface 22b is made of a high-friction material, the ring spun yarn b receives a frictional force from the rotating curved surface 22b in a direction perpendicular to the ring spun yarn, and the frictional force causes the ring spun yarn b to be temporarily applied to the ring spun yarn b. Twist will be added. The direction of the false twist is the same as the original twist direction of the ring spun yarn. That is, the curved surface 22
By passing through b, a false twist is added to the ring spun yarn b in addition to the original twist, and it becomes a stronger twist to promote migration, and the leading and trailing ends of the fibers are wound into the ring spun yarn b. To reduce fluff. And thread b
Progresses and passes through the curved surface 22b, the false twist is released and returns to only the original twist.

The direction of the false twist applied to the yarn b is opposite when passing the right side of the center O of the curved surface 22b and when passing the left side. Further, if the contact is made across both sides of the center O of the curved surface, the false twist directions are opposite to each other on both sides of the center O. Therefore, the contact may be made under the most appropriate condition according to the setting condition of the D-type rotor.

FIG. 7 shows the principle of false twisting by the S-type rotor 23. The S-type rotor 23 also has a rotation shaft 23a like the D-type rotor, but has a different curved surface 23b. This curved surface 23b has two spherical surfaces 23b having the same radius but different directions.
1 and 23b2, which are formed by smoothly connecting between them. This curved surface 23b is herein referred to as a drum-shaped curved surface 23b. The S-type rotor is also made of an elastic material having a large friction coefficient, such as rubber, like the D-type rotor.

The ring spun yarn b being twisted has two spherical surfaces 2
S so that both 3b1 and 23b2 come into contact
It comes into contact with the hourglass-shaped curved surface 23b after meandering in the shape of a letter. In order to make such contact, the traveling direction of the ring spun yarn b and the rotating shaft 23a are inclined by the angle θ.
In the embodiment of the present invention, θ is set to about 30 °.

When the ring spun yarn b runs in the direction of the arrow,
Since the ring spun yarn b is in eccentric contact with the hourglass curved surface 23b, the friction between the ring spun yarn b and the hourglass curved surface 23b causes the S-shaped rotor 23 to rotate in the direction of the arrow. Then, false twist is applied to the yarn b by friction between the yarn b and the hourglass-shaped curved surface 23b. Since the curved surface is a drum shape, the yarn b strongly adheres to the curved surface, and since twisting torque can be applied to both the curved surfaces 23b1 and 23b2 on both sides, a much stronger double rotor than the D-type rotor 22 can be obtained. Such a false twist torque is received.

In the above-described embodiment, the curved surfaces of the D-type rotor and the S-type rotor are spherical. However, the present invention is not limited to the spherical surface, and various types such as an elliptical surface, a conical surface, a paraboloid, and a toroidal surface may be used. Curved surfaces can be used. In addition, although the D-type rotor and the S-type rotor are configured to rotate by running the yarn, a power source such as a motor may be provided to positively rotate the rotor. However, if the configuration is such that the yarn is rotated by traveling of the yarn as in the present invention, a driving source such as a motor is not required, so that the configuration can be simplified.

FIG. 8 is a diagram for explaining the operation of the present invention.
The rotor case 21 is arranged with respect to the front roller 4 as shown by a virtual line. The rotor case 21 includes the arm 13
And the T-shaped frame 12, and the magnet 14 is attracted to the front roller to be in a stable state. However, it is not fixed as described above, and can be moved right and left in accordance with the movement of the T-shaped frame 12 in the traverse of the roving. The D-shaped rotor 22 is arranged such that the curved surface of the tip faces the front roller 4 and is close to the front roller 4.
Are arranged at an angle of about 30 ° with respect to the passing direction. The ring spun yarn b eccentrically contacts the curved surface at the tip of the D-shaped rotor 22, then entangles in an S-shape below the S-shaped rotor 21, and proceeds in the direction of the spindle 5.

The twisting torque transmitted from the spindle 5 via the snell wire 8 twists a portion of the yarn in contact with the S-type rotor 23 and further twists the yarn to form a D-type rotor 22.
Is twisted, and further rises to reach the fleece c.

On the other hand, as the ring spun yarn b advances in the direction of the arrow, the D-type rotor 22 and the S-type rotor 23 rotate in the direction of the arrow in FIG.
Then, a false twisting torque is applied to the yarn by the spherical surfaces 23b1 and 23b2 on both sides of the groove. This false twist torque is further amplified by the D-type rotor 22 in the same direction as the twist of the yarn b, and reaches the twisted portion (apex of the triangle) of the fleece c. As a result, the twist at the twisted portion is strengthened, the migration action is strengthened, and both ends of the fiber are twisted to reduce fluff. At this time, the guide nose 21b and the D-shaped rotor 22
The fleece angle α can be freely changed by adjusting the position of, and even if it is increased to about 50 °, the yarn breakage does not increase due to the effect of false twist. Also,
The ability to increase the fleece angle further enhances the migration action, promotes twisting of the fiber at the leading and trailing ends into the yarn, and significantly reduces fluff.

In the embodiment of the present invention, in addition to the above-mentioned D-type rotor and S-type rotor, the guide case 2
1b. The configuration and operation of the guide nose 21b are the same as those of the guide nose 10b described in FIG. 3, but in this embodiment, since the D-type rotor and the S-type rotor are added, the Type rotor 2
By the strong false twist amplified in 2, the migration effect can be further ensured, and the fluff of the yarn can be further reduced as compared with the case where only the guide nose is used.

The positions of the guide nose 21b, the D-shaped rotor 22 and the S-shaped rotor 23 of the present invention are always constant from the start of the winding of the thread until the full thread is reached. However, the fluctuation of the fleece angle between the start of winding of the tube thread and the full tube is eliminated, a stable fleece angle can be secured, and the problem due to the fluctuation from the start of winding to the full tube can be solved.

The fluff control device of the present invention is a device which can be handled simply by making the front roller of the ring spinning machine attract only the magnet 14. Further, since the arm 13 can freely swing between the use position and the retreat position, in actual operation, the device is moved together with the rotor case 21 in the arrow r direction shown in FIG. After being separated to the separated evacuation position and performing the normal splicing operation, it may be returned to the use position and adsorbed by the magnet 14,
Operation is very simple.

Since the arm 13 is made of an elastic body, it can be attached and detached by a snap action.
It is easy to attach and detach, and is not damaged by operator's operation mistakes or interference of various automatic machines such as an autodoffer.

In the ring spinning machine, in order to prevent the front rubber roller from being worn locally, the roving a
A so-called traverse motion that moves slowly left and right over a width of mm is performed. Therefore, the fluff control device of the present invention also needs to be configured to be movable in conjunction with the traverse motion.

In such a case, it is usually necessary to install another tuning bar that synchronizes with the traverse bar that moves the roving, but the number of parts increases and the work of installing the spinning bar on the spinning machine is also difficult. is there. Therefore, the T-shaped frame 1 of the present invention
No. 2 is configured to be merely placed on the draft part, and furthermore, the T-shaped frame itself can be moved left and right with the movement of the roving by passing the roving through the groove 12c. Such a configuration is not only inexpensive and simple, but also can be easily removed at the time of periodic maintenance, so that there is no hindrance to maintenance work.

Next, data comparing the spun yarn obtained by the present invention (referred to as "migrated yarn") with the spun yarn obtained by a conventional spinning machine are shown in the table. Table 1 shows that 60
The count of cotton yarn was taken 10 m from the same weight, and the number of fluffs of 3 mm or more was counted.

[Table 1]

Table 2 shows the values of 4 spun on a conventional ring spinning machine.
The strength increase rate of the migrated yarn is measured when the single yarn strength of the 0th cotton yarn is defined as 100%. , The number of the weight from which the material was taken out was used to alternately and repeatedly take out the yarn in the case where the fluff control device A2 of the present invention was attached and detached from each weight so that the influence of the difference in the raw cotton did not occur. In Table 2, "average tenacity" is the average value of all the measured values, and "minimum 5" is the average value of 5 from the lowest value among the measured values. It was done.

[Table 2]

As can be seen from the above table, for the fluff of 3 mm or more, the migrated yarn of the present invention drastically decreased to 1/10 or less of the fluff of ordinary cotton yarn. In addition, the strength of the singleton increased steadily by 10% or more. In addition, the amount of fly waste generated during the rewinding process in the winder was reduced to 以下 or less, and there was a great effect on the improvement of environmental pollution due to the floating fibers which were destined for the textile factory.

Although the embodiments of the present invention have been described with reference to the two embodiments in which only the guide nose is used, and in which the guide nose, the D-type rotor and the S-type rotor are used, only the D-type rotor or the S-type rotor is used. Even with a configuration using only the rotor, it is possible to significantly reduce the generation of fluff.
Further, it is of course possible to adopt a configuration in which any two of these three are combined. Further, since a considerable airflow is generated by the rotation of the front roller, the flute 9 can be omitted.

[0059]

As described above, according to the present invention, in the method for producing a spun yarn, the guide nose facilitates the winding of the leading end and the trailing end of the fiber constituting the fleece, and prevents the fiber from being wound from the front roller. The yarn to be spun passes over a curved surface, and the curved surface is rotated to apply a false twist to the yarn by a frictional force between the curved surface and the yarn. The migration action of winding into the inside of the fiber is strengthened, and a spun yarn with less fluff and increased strength can be obtained. Further, since the fluff is reduced, the generation of fly waste in the subsequent winder step, warping step, and the like is reduced. It is also possible to reduce the amount of gluing when warping the warp of the loom.

Further, if the curved surface is configured to rotate by friction during running of the yarn, a driving source is not required, so that the configuration is simplified. If a guide nose or a flute is provided in addition to the curved surface, the migration action is further enhanced.

According to the present invention, since the fleece angle can be increased, the generation of fluff can be reduced from this point as well.
Further, the fleece angle does not change between the start of winding of the tube thread and the full tube, so that stable quality can be obtained. If the fluff control device is attracted to the front roller by the magnet and can be moved between the use position and the retracted position, the piecing operation can be simplified, and the fluff control device does not interfere. In addition, the structure can be simplified if it can be moved by the tension of the roving.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a main configuration of a ring spinning machine equipped with a fluff control device according to a first embodiment of the present invention.

2A is a perspective view of a case, and FIG. 2B is a perspective view as viewed from B in FIG.

3A and 3B are diagrams for explaining the operation of a guide nose, wherein FIG. 3A is a perspective view of a main part, and FIG. 3B is a side view.

FIG. 4 is a perspective view of a main part showing a use state of a fluff control device according to a second embodiment of the present invention.

FIG. 5 is an exploded perspective view of the fluff control device of FIG.

FIG. 6A is a perspective view showing a principle of giving a false twist by a D-type rotor, and FIG. 6B is a side view.

FIG. 7 is a perspective view showing a principle of giving false twist by an S-shaped rotor.

FIG. 8 is a perspective view illustrating an arrangement state of the fluff control device of FIG. 4;

FIG. 9A is a side view showing a main part configuration of a conventional ring spinning machine, and FIG. 9B is an enlarged side view of a front roller portion.

FIG. 10 is a perspective view showing a state in which the fleece is twisted.

[Explanation of symbols]

 Reference Signs List a roving b spinning c fleece 4 front roller 5 spindle 5 'bobbin 6 ring 7 traveler 9 flute 10 case 10b, 21b guide nose 11 case holding device 21 rotor case 22 D-shaped rotor 22b curved surface 23S-shaped rotor 23b drum-shaped curved surface

Claims (14)

[Claims] 1. A method for manufacturing a spun yarn in which a fleece spun from a front roller through a draft part is twisted and wound, and a fleece spun from the front roller and not twisted is twisted up. A method for producing a spun yarn, wherein a guide nose is provided at a boundary with a twisted portion to be wrapped, and the guide nose gently presses the fleece to promote the winding of the leading and trailing ends of the fibers constituting the fleece. 2. A method for producing a spun yarn in which a fleece spun from a front roller via a draft part is twisted and wound, and the yarn spun from the front roller is passed over a curved surface, and the curved surface is rotated. A method for producing a spun yarn, wherein false twist is given to the yarn by a frictional force between the curved surface and the yarn. 3. The method for producing a spun yarn according to claim 2, wherein the curved surface is rotated by a frictional force with a passing yarn. 4. A guide nose is provided at a boundary between a fleece spun from the front roller and untwisted and a twisted portion that is twisted, and a tip end of a fiber constituting the fleece by the guide nose. 4. The method for producing a spun yarn according to claim 2 or 3, wherein winding of the rear end portion is promoted. 5. The method for producing a spun yarn according to claim 2, wherein the curved surface is passed a plurality of times. 6. A flute is disposed below the front roller, and a leading end and a trailing end of a fiber near the guide nose are guided into the twisted portion by a suction airflow of the flute. 6. The method for producing a spun yarn according to any one of 1, 4, and 5. 7. A spinning machine for twisting and winding a fleece spun from a front roller via a draft part, wherein a flute is provided below the front roller, and the fleece spun from the front roller is not twisted. A spinning machine characterized in that a guide nose is provided at a boundary between a state fleece and a twisted twisting portion. 8. A spinning machine that twists and winds a fleece spun from a front roller through a draft part, wherein a curved surface having a rotation axis and having a symmetrical shape with respect to the rotation axis is provided near the front roller. A spinning machine comprising a D-shaped rotor made of a high-friction material and a D-shaped rotor arranged such that the yarn being twisted on the curved surface is in eccentric contact. 9. A spinning machine for twisting and winding a fleece spun from a front roller through a draft part, wherein an S-shaped rotor having a drum-shaped curved surface made of a high friction material is rotatably provided near the front roller. A spinning machine, wherein the S-shaped rotor is disposed such that the yarn is eccentrically contacted with the drum-shaped curved surface in an S-shape. 10. The yarn being twisted is formed of the guide nose, D
The spinning machine according to any one of claims 7 to 9, wherein the fleece angle is increased by contacting either the mold or the S-shaped rotor. 11. A case disposed near a front roller of a spinning machine, and a guide nose formed on a yarn inlet side of the case, and the guide nose forms a fleece tip and a rear end. A fluff control device for a spinning machine characterized by promoting end winding. 12. A D-type rotor comprising a rotor case disposed near a front roller of a spinning machine and a high friction material rotatably supported in the rotor case and having a curved surface symmetrical with respect to a rotation axis. , Which also has a drum-shaped curved surface made of a high friction material rotatably supported in the rotor case.
Wherein the yarn spun from the front roller and being twisted makes eccentric contact with the curved surface of the D-shaped rotor, and the yarn passing through the D-shaped rotor contacts the drum-shaped curved surface of the S-shaped rotor. The D-shaped rotor and the S-shaped rotor are arranged so as to be eccentrically contacted in an S-shape, a guide nose is formed on the yarn inlet side of the rotor case, and a tip of a fiber constituting a fleece is formed by the guide nose. A fluff control device for a spinning machine characterized by promoting entrainment of a rear end portion. 13. A magnet for attracting to a front roller is provided on the case or the rotor case, and the case or the rotor case is movably supported between a use position close to the front roller and a retracted position separated from the front roller. 13. The fluff control device for a spinning machine according to claim 11, wherein a case holding device is provided. 14. The fluff control device for a spinning machine according to claim 13, wherein said case holding device positions said rotor case at a predetermined position by tension of roving supplied to the spinning machine.