JPH062228A - Rotor-type open-end spinning frame - Google Patents

Abstract

PURPOSE:To produce a yarn having excellent tightening property, capable of decreasing the number of fluffs on the surface of the yarn and giving a cloth having improved feeling. CONSTITUTION:A rotary member 11 is coaxially placed in a rotor having a fiber collection part 6a and actively driven independent of the rotor. A part of the rotary member 11 is positioned opposite to a part near the fiber collection part 6a of the rotor and another part of the rotary member is positioned close to an end of a yarn delivery path. The rotary member 11 is provided with a thread guide 36 to guide a fiber bundle from a part near the fiber collection part 6a to a position opposite to the yarn delivery path. A twist propagation preventing part 38 is placed at an end of the fiber collection part 6a of the thread guide 36. A resistor 39 coming in contact with the surface of the fiber bundle F without inhibiting the rotation of the fiber bundle F is placed on the downstream side of the twist propagation preventing part 38. The fiber bundle F rotates around its axis in contact with the resistor 39 to spirally wind the fluffs around the outer circumference of the fiber bundle. Fibers loosely wound on the surface part is tightly wound on the fiber bundle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor type open end spinning machine.

[0002]

2. Description of the Related Art Generally, in a rotor-type open-end spinning machine, a supply sliver is opened by a combing roller to separate impurities, and the fibers that have been opened are separated based on a negative pressure in a rotor that rotates at a high speed. It is transported into the rotor by the air flow generated in the transport channel. Then, the fibers transported into the rotor are converged in a fiber converging portion (fiber converging groove) which is the maximum inner diameter portion of the rotor, and are added by the action of the pulling roller from a guide hole (thread pulling passage) provided at the center of the navel. It is pulled out while being twisted, and wound on a bobbin as a package. That is, in the rotor open-end spinning machine, when the fiber bundles focused on the fiber focusing portion are stripped from the fiber focusing portion and drawn out along the wall surface of the guide hole formed in the center of the navel, the wall surface As a result of the friction between the fiber bundle and the rotation of the rotor, the fiber bundle is pulled out while rotating along the inner wall surface of the guide hole, whereby the fiber bundle is twisted.

In a rotor type open-end spinning machine, a bent portion of a yarn drawing passage formed by a guide hole and a yarn pipe with respect to a fiber bundle stripped from the fiber bundle and a fiber bundle stripped from the fiber bundle. Twist is added to and from the point as the rotor rotates. Then, in order to prevent yarn breakage due to small twist propagation to the fiber bundle during twisting, the false twist in the same direction as the actual twist is applied to the yarn (fiber bundle) upstream from the navel by the action of the navel. There is. Further, there is also proposed an apparatus in which a member for imparting a false twist in the same direction as the actual twist is provided on the yarn between the navel from the navel on the downstream side (the pulling roller side) from the actual twist starting point (for example, (Kaisho 62-276031).

[0004]

However, the yarn produced by the conventional open-end spinning machine does not have the directionality of the outer layer fiber, does not have tightness, and has a lot of fluffs, and therefore has a texture when formed into a cloth. There was a problem of being bad. It is considered that the reason is that the twisting of the fiber bundle is not effectively performed. That is, since the fiber bundle does not undergo twisting in a state in which the rotation of both ends of all the fibers constituting the fiber bundle is restricted, a part of the outer layer fibers constituting the fiber bundle serves as fluff on the surface of the fiber bundle F. It will be in a state of popping out of

As a means for solving the above problems, it is conceivable to provide a member that comes into contact with the fiber bundle and winds fluff or the like in the actual twist direction when the actual twist is applied to the fiber bundle. However, when a member that comes into contact with the fiber bundle (yarn) is provided between the actual twisting start point and the fiber bundle of the conventional rotor type open-end spinning machine, the following disadvantages occur and a good quality yarn is obtained. It is not possible. That is, the position where the contact member is provided is between the actual twisting start point and the navel, but this position is the position where the false twist imparted to the fiber bundle by the action of the navel returns. As a result, the fluff is wound in the direction opposite to the true twist and the outer layer fibers are loosened.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to reduce the amount of fluff existing on the surface of a yarn, to improve the tightness, and to improve the texture of a cloth. An object of the present invention is to provide a rotor-type open-end spinning machine capable of producing yarn.

[0007]

In order to achieve the above-mentioned object, in the present invention, a rotor having a fiber concentrating portion for concentrating fibers supplied in an opened state is provided independently of the rotor. A rotor having a shape that is driven and at least a portion of which faces the vicinity of the fiber focusing portion of the rotor and a portion of which corresponds to the end of the yarn drawing passage is provided coaxially with the rotor, and the fiber focusing portion is provided on the rotor. A yarn path that guides the fiber bundle from the vicinity to a position facing the yarn drawing passage is formed, and contacts the surface of the fiber bundle without blocking rotation of the fiber bundle between the actual twisting start point and the fiber collecting portion. A resistor is provided.

[0008]

The opened fiber fed into the rotor from the fiber transport channel slides along the rotor wall and is converged on the fiber converging portion having the maximum inner diameter. One end of the fiber bundle bundled in the fiber bundle portion is connected to the yarn drawn by the drawing roller. The fiber bundle is stripped from the fiber collecting portion and guided to a yarn path formed in the rotating body, and is drawn out as a yarn while being twisted by the rotation of the rotating body that rotates at substantially the same speed as the rotor. The fiber bundle that is being stripped off from the fiber converging portion and being twisted to form a yarn is pulled out while its surface is in contact with a resistor provided between the actual twist origin and the fiber converging portion. By twisting the fiber bundle in contact with the resistor, the fluff on the surface spirally wraps around the outer surface of the fiber bundle, and the fiber gently wrapping around the surface part tightens the internal fiber, It is tightly wrapped.

[0009]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, a pair of rotating shafts 2 (only one is shown) are supported in parallel with each other via a bearing 3 on a base 1 fixed to a machine frame (not shown). Support disks 4 are integrally rotatably fitted to both ends of the rotary shaft 2, and a pair of adjacent support disks 4 form wedge-shaped recesses 5 (shown in FIG. 3).
A hollow rotor shaft 7 having a rotor 6 fitted and fixed at its tip is supported in the wedge-shaped recess 5 with its outer peripheral surface in contact with each support disk 4. A drive belt 8 common to a plurality of weights is arranged between two pairs of support discs 4 in a direction orthogonal to the rotor shaft 7 while the rotor shaft 7 is in pressure contact with the support disc 4. The drive belt 8 is driven by a drive motor (not shown), and the rotor shaft 7 is rotationally driven by the traveling of the drive belt 8.

Bearings 9 are fixed to large diameter portions 7a formed at both ends of the rotor shaft 7, and a shaft 10 penetrating the rotor shaft 7 is rotatable coaxially with the rotor shaft 7 through the bearings 9. Supported by. The shaft 10 has a rotating body 11 integrally fitted and fixed to a tip end thereof, and a base end thereof abuts on a thrust bearing 12. Like the drive belt 8, a drive belt 13 provided in common for a plurality of weights is pressed against the shaft 10 in a state of traveling in a direction orthogonal to the shaft 10, and the shaft 10 is rotationally driven by the traveling of the drive belt 13. Has become. The thrust bearing 12 includes a case 14 in which lubricating oil O is stored, a ball 16 supported by an oil supply member 15 made of felt, and an adjusting screw 15 a that abuts on the ball 16 from the opposite side of the shaft 10. The supporting disk 4 is similar to that described in Japanese Patent Publication No. 53-32409, and when the supporting disk 4 rotates as the rotor shaft 7 rotates, the thrust bearing 12 with respect to the rotor shaft 7 rotates. It is fixed to the rotary shaft 2 in a slightly inclined state so that a thrust load toward the side acts. The thrust load acting on the rotor shaft 7 is transmitted to the shaft 10 via the bearing 9 and supported by the thrust bearing 12.

A boss portion 18 is formed on the housing 17 disposed at a position facing the open side of the rotor 6 so as to project into the rotor 6. The boss portion 18 has one end of a fiber transport channel 22 for guiding the fibers supplied by the action of the feed roller 19 and the presser 20 and opened by the combing roller 21 into the rotor 6. A casing 23 that covers the rotor 6 is disposed at a position facing the housing 17 so as to abut on the end surface of the housing via an O-ring 24. The casing 23 is connected to a negative pressure source (not shown) by a pipe 25. Connected through.

At the center of the boss portion 18, a navel 27 having one end of the yarn drawing passage 26 opened is arranged. An ejector 29 as a negative pressure generating device is arranged in the middle of the yarn pipe 28 that constitutes the downstream portion of the yarn drawing passage 26. The yarn pipe 28 is disposed so as to intersect with the center line of the navel 27, and
The 7-sided end 28a is the twist starting point (actual twist starting point) of the yarn. The ejector 29 is provided with a passage 30 provided at the center.
And a plurality of injection holes 31 provided outside the passage 30 for injecting compressed air toward the outlet side (thread drawing side) of the passage 30 and an annular chamber 32 provided outside the injection hole 31. I have it. The chamber 32 communicates with each injection hole 31 and the hole 33, and has an opening to which the compressed air supply pipe 34 is connected. The compressed air supply pipe 34 is connected to a compressed air source (not shown), and a pressure adjusting device and a valve (both not shown) are provided in the middle thereof. Then, the ejector 29 generates a negative pressure at the inlet side of the passage 30 by injecting compressed air of a predetermined pressure supplied from the compressed air source through the compressed air supply pipe 34 through the injection hole 31. ing.

The rotating body 11 is formed in such a shape that a part of its peripheral surface extends to the vicinity of the fiber converging portion 6a of the rotor 6, and a navel 27 is provided in the center portion on the side corresponding to the boss portion 18. A recess 35 to be fitted is formed. The rotor 11 is formed such that the radius of the maximum outer diameter portion is larger than the radius of the inner surface of the open end of the rotor 6. A yarn path 36 is formed at the maximum outer diameter portion of the rotating body 11 so as to extend in the radial direction from the center of the rotating body 11. That is, one end of the yarn path 36 is opened near the fiber collecting portion 6a of the rotor 6, and the other end is opened at a position facing the yarn drawing passage 26, that is, at the bottom of the recess 35. A cover plate 37 that allows the yarn path 36 to be opened is provided at the end of the rotating body 11 on the housing 17 side.
Is stuck. The rotor 11 is fixed to the shaft 10 so that the gap between the boss 18 and the rotor 11 is as small as possible in order to improve the sealing property between the boss 18 and the rotor 11.

As shown in FIGS. 3 and 4, a semi-cylindrical twist propagation preventing portion 38 is formed so as to bulge at the inlet side end of the yarn path 36 on the wall surface on the rotation direction side of the rotating body 11. The twist propagation preventing portion 38 is in a state of being pressed by the twist propagation preventing portion 38 by the force with which the fiber bundle F is drawn into the yarn path 36, so that the twist propagation from the location to the upstream side of the fiber bundle F is propagated. It is designed to prevent

In the yarn path 36, on the downstream side of the twist propagation preventing portion 38, the rotation of the fiber bundle (thread) F guided to the yarn passage 26 while being pressed against the twist propagation preventing portion 38 is prevented, and the rotation of the fiber bundle F is prevented. A resistor 39 that contacts the surface is provided. The resistor 39 is formed by bulging a part of the wall surface of the yarn path 36 in parallel with the yarn path 36.

Next, the operation of the device configured as described above will be described. During the spinning operation, the drive belts 8 and 13 travel in the same direction, and the rotor 6 and the rotating body 11 are rotationally driven in the same direction via the rotor shaft 7 and the shaft 10. By making the drawing speed of the yarn Y faster than the rotation speed of the rotor 6, the fiber bundles F are sequentially stripped off from the fiber collecting portion 6a and introduced into the yarn path 36. The rotating body 11 rotates at a speed slightly lower than the stripping speed of the fiber bundle F from the fiber collecting portion 6a (slightly higher than the rotation speed of the rotor 6).
Further, compressed air is supplied to the ejector 29 from the compressed air source through the compressed air supply pipe 34, and the yarn drawing passage 26 on the upstream side (rotor 6 side) of the ejector 29 is further negative in pressure than the negative pressure in the rotor 6. And a suction action occurs. In this state, the spread fibers that have been spread by the action of the combing roller 21 and fed into the rotor 6 from the fiber transport channel 22 slide along the inner surface of the rotor 6 and are converged on the fiber converging portion 6a that is the maximum inner diameter portion. To be done. The fiber bundle F bundled in the fiber collecting portion 6a is smoothly stripped from the fiber collecting portion 6a by the suction airflow toward the yarn path 36 which is generated based on the negative pressure in the yarn path 36, and is guided into the yarn path 36. .

The fiber bundle F is connected to the yarn Y drawn through the yarn pipe 28 by a drawing roller (not shown), and is drawn as the yarn Y while being twisted by the rotation of the rotating body 11 as the yarn Y is drawn. . Thread Y and fiber bundle F
The twist applied to the wire is transmitted from the end 28a of the yarn pipe 28 to the upstream thereof as a starting point.

When the fiber bundle F is introduced into the yarn path 36, the fiber bundle F is subjected to tension, and the twist propagation preventing portion 3 formed at the inlet of the yarn path 36.
It is in a state of being pressed against 8. As a result, the fiber bundle F is prevented from rotating at the relevant portion, and the yarn and the fiber bundle that are pulled out while being twisted are prevented from rotating around the twist propagation preventing portion 38.
Propagation to the fiber bundle F upstream from the position corresponding to is suppressed. That is, twisting is stopped at a position corresponding to the twist propagation preventing portion 38. Therefore, the fiber bundle F undergoes twisting in a state where tension is applied to the fibers during twisting and the fibers are stretched. As a result, the fibers are twisted straight, the yarn strength is increased, and a yarn with good tightness is obtained. The longer the contact length between the fiber bundle F and the twist propagation preventing portion 38 is, the greater the twist preventing effect is.
The radius of curvature of 8 is preferably 0.5 mm or more.

Since not all the fibers constituting the fiber bundle F are twisted in the fiber bundle F with the rotation of both ends thereof restricted, the fiber bundle F passing through the twist propagation preventing portion 38 is the outer layer fiber. A part of the fluff protrudes from the surface of the fiber bundle F. When the fiber bundle F having fluffs on its surface passes through the position corresponding to the resistor 39, the surface of the fiber bundle F is so strong that its rotation is not blocked.
Slide on. That is, the fiber bundle F is rotated (rotated) by twisting while a part of the outer layer fibers and the fluff on the surface are in contact with the resistor 39. As a result, as shown in FIG. 5B, the fluff on the surface is spirally wound around the outer peripheral surface of the fiber bundle, and the fibers gently wound around the surface are tightly wound so as to tighten the fibers inside. . Then, the outer layer fibers and the fluff are wound around the outer circumference of the fiber bundle F, so that the yarn Y is tightened, and a fabric having a good texture can be obtained.

As described above, since the propagation of twists upstream from the twist propagation preventing portion 38 is prevented, the strength of the fiber bundle F just peeled from the fiber collecting portion 6a is weak. However, since the rotating body 11 is actively driven at a predetermined speed independently of the rotor 6, the force acting on the fiber bundle F at the time of stripping is stable,
Stripping of the fiber bundle F is smoothly performed. Then, the action of the ejector 29 generates a suction airflow toward the yarn path 36, so that the fiber bundle F is stripped off and the fiber bundle F is smoothly introduced into the yarn path 36. Since the supply of compressed air to the ejector 29 is stopped during yarn splicing, the reverse insertion of the yarn Y from the yarn pipe 28 through the yarn drawing passage 26 and the yarn path 36 into the rotor 6 is smoothly performed.

(Second Embodiment) Next, a second embodiment will be described with reference to FIG. This embodiment is different from the above embodiment in that a brush 40 having a large number of bristles planted as a resistor is provided in the yarn path 36, and other configurations are the same. Also in this embodiment, when the fiber bundle F passes through the position corresponding to the brush 40 as in the previous embodiment, the fluff on the surface of the fiber bundle F spirally wraps around the outer peripheral surface of the fiber bundle and gently wraps around the surface portion. As the fibers inside are tightening the fibers inside,
It is tightly wrapped. As a result, the yarn Y is in a tightened state, and a yarn having a good texture can be obtained.

(Third Embodiment) Next, a third embodiment will be described with reference to FIG. In this embodiment, a resistor 41 having a width substantially equal to the thickness of the yarn Y and having a groove 41a whose bottom is in sliding contact with the fiber bundle F is provided in the yarn path 36 as the resistor.
In the case of this embodiment, the resistor 41 is in contact with the fiber bundle F from three directions, so that the resistor 41 reliably contacts the fiber bundle F even when the yarn vibrates. Therefore, fluff or the like is more reliably wound around the outer circumference of the fiber bundle F as compared with the above-described respective embodiments. In the case of this embodiment, when the thickness of the spun fiber is changed, the resistor 41 is correspondingly provided with a groove 41a having an optimum groove width.
It is necessary to replace the resistor 41 with

The present invention is not limited to the above-described embodiments. For example, as shown in FIG. 8, a V groove is provided in the resistor 39 of the first embodiment, or as shown in FIG. The leaf spring 42 may be provided as a body. When the leaf spring 52 is provided, it is possible to follow the change in the thread thickness. Further, a large number of streaks extending along the moving direction of the fiber bundle F may be engraved on the wall surface of the twist propagation preventing portion 38, or a V groove may be formed. In the case of individual pieces, twisting is more reliably performed. Further, the twist propagation preventing portion 38 is not always necessary, and the twist propagation preventing portion 38 may be omitted. Further, a mechanical seal or a labyrinth seal may be provided between the boss portion 18 and the rotating body 11, or another suction means may be connected to the yarn pipe as a negative pressure generating device instead of the ejector. Furthermore, the negative pressure generator may be omitted.

[0024]

As described in detail above, according to the present invention, the fluff on the surface spirally wraps around the outer peripheral surface of the fiber bundle, and the fibers gently wrapping around the surface part tighten the internal fibers. Since it is tightly wound, the amount of fluff existing on the surface of the yarn can be reduced, and the yarn can be manufactured with good tightness and good texture when made into cloth.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a first embodiment embodying the present invention.

FIG. 2 is a partially enlarged sectional view.

FIG. 3 is a partial cross-sectional view showing the relationship between the rotor, the rotating body, the support disk, and the rotor shaft as viewed from the opening side of the rotor.

FIG. 4 is a partially enlarged view of the rotating body as seen from the opening side of the rotor with the cover plate omitted.

FIG. 5A is a partially enlarged view of the rotating body as seen from the inlet side of the yarn path, and FIG. 5B is a schematic view showing the action.

6A is a view corresponding to FIG. 4 in which the rotating body of the second embodiment is viewed from the opening side of the rotor, and FIG. 6B is a VI of FIG.
It is a VI sectional view taken on the line.

7A is a view corresponding to FIG. 4 in which the rotating body of the third embodiment is viewed from the opening side of the rotor, and FIG. 7B is a VI of FIG.
It is a sectional view taken along the line I-VII.

FIG. 8 is a cross-sectional view corresponding to FIG. 7 (b) showing a modified resistor.

FIG. 9 is a view corresponding to FIG. 4 showing a resistor according to another modification.

[Explanation of symbols]

6 ... Rotor, 6a ... Fiber converging section, 11 ... Rotating body, 26
Thread drawing passage, 27 ... Navel, 28 ... Yarn pipe,
38 ... Twist propagation preventing portion, 39, 41 ... Resistor, 40 ... Brush as resistor, 41a ... Groove, 42 ... Leaf spring as resistor, F ... Fiber bundle, Y ... Yarn.

Front page continuation (72) Inventor Yasuyuki Kawai 2-chome, Toyota-cho, Kariya city, Aichi Prefecture Toyota Industries Corporation

Claims (1)

[Claims] 1. A rotor having a fiber converging portion for converging fibers supplied in an opened state is actively driven independently of the rotor and at least a part of the rotor is in the vicinity of the fiber converging portion of the rotor. A yarn is provided coaxially with the rotor so as to face the end of the yarn drawing passage and a part of the same is provided on the rotor. The yarn guides the fiber bundle from the vicinity of the fiber collecting portion to a position facing the yarn drawing passage. A rotor-type open-end spinning machine provided with a resistor that forms a path and is in contact with the surface of the fiber bundle without blocking rotation of the fiber bundle between the actual twisting start point and the fiber converging portion.