JP2864753B2 - Rotor type open-end spinning machine - Google Patents

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 spread by a combing roller to separate impurities, and the separated fibers are transported on the basis of a negative pressure in a rotor which rotates at a high speed. It is transported into the rotor by the airflow generated in the channel. Then, the fibers transported into the rotor are bundled in a fiber bundling portion (fiber bundling groove) at the maximum inner diameter portion of the rotor, and are drawn out while being twisted by the action of a drawing roller from a guide hole provided in the center of the navel. , And is wound on a bobbin as a package. That is, in the rotor-type open-end spinning machine, the fiber bundle bundled in the fiber bundle unit is peeled off from the fiber bundle unit and drawn out along the wall surface of a guide hole (thread drawing passage) formed in the center of the navel. In this case, the fiber bundle is twisted by being drawn out while rotating along the inner wall surface of the guide hole with the rotation of the rotor due to friction with the wall surface.

[0003] However, since the fiber bundles collected in the fiber collecting portion are only attached to the inner wall surface of the fiber collecting portion by the action of the centrifugal force accompanying the rotation of the rotor, the fiber bundle is pulled out while rotating along the guide holes. The twist added to the fiber bundle to be propagated propagates to the fiber bundle before being drawn out as a thread while being attached to the fiber bundle, and the fiber bundle in the fiber bundle rotates on its own. For this reason, sufficient tension is not obtained at the time of twisting, and twisting is applied in a state where the fiber is not sufficiently stretched, so that the fiber is not twisted straight and the yarn strength is not increased. In addition, there is a problem that the fiber jumping into the twisting region becomes a fiber wrapped around the forming yarn, and the yarn appearance is poor.

In order to solve the problem that the yarn strength does not increase, Japanese Patent Laid-Open Publication No. Sho 51-64034 discloses a drawer hole for drawing out a fiber bundle bundled in a fiber bundle portion inside a rotor having a fiber bundle portion. And a draft rotor that performs differential rotation with respect to the rotor is provided, and a small disk that revolves and rotates while being pressed against the fiber bundle collected in the fiber collecting portion is attached to the draft rotor, and the fiber bundle is floated. There is disclosed an apparatus for spinning while drafting in a state in which is suppressed.

[0005]

In the above-described apparatus, when twist is applied to the fiber bundle stripped from the fiber bundle, the end of the fiber bundle is in a state of being pressed against the fiber bundle by a small disk. Therefore, a sufficient tension is obtained at the time of twisting.
However, since the small disc faces the fiber bundle, the spread fibers are less likely to enter the fiber bundle when the small disc is placed at a position corresponding to the opening of the fiber supply passage.
Each time the draft rotor makes one rotation, it is in that state, so that the fiber bundle focused on the fiber bundle is spotted,
Not only is there a risk that yarn breakage will occur frequently during spinning, but there is also a problem that the yarn quality of the spun yarn is reduced. Further, there is also a problem that the apparatus is complicated because it is essential to actively drive the rotor and the draft rotor so that the relationship between the differential rotation between the rotor and the draft rotor and the drawing speed of the fiber bundle becomes a predetermined value. is there.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object thereof is to twist and twist a fiber constituting a fiber bundle to be drawn while being twisted into a yarn in a relatively straightened state. Another object of the present invention is to provide a rotor-type open-end spinning machine capable of producing a yarn having high tensile strength and good appearance.

[0007]

In order to achieve the above object, according to the present invention, at least a part of the rotor faces the vicinity of a fiber bundle of the rotor and a part of the rotor corresponds to an end of a yarn drawing passage. A rotatable member is formed coaxially with the rotor so as to be rotatable relative to the rotor, and the rotatable member has a yarn path with one end opened near the fiber bundle portion and the other end opened at a position facing the yarn drawing path. and, in the middle of the yarn path, the yarn canal to the fiber bundle is stripped from the fiber collecting section moving the yarn Hokkaido
Pneumatic pressing to apply pressing force by air flow injected into
Means were provided .

[0008]

The spread fiber fed into the rotor from the fiber transport channel slides along the rotor wall and is collected at the fiber collecting portion which is the maximum inner diameter portion. One end of the fiber bundle collected in the fiber collecting section is connected to the yarn drawn by the drawing roller. Fiber bundle is guided to the yarn canal is stripped from the fiber維集bundle section, drawn out as the yarn while being twisted by the rotation of the rotor. The fiber bundle stripped from the fiber bundle is moved by a pneumatic pressing means provided in the middle of the yarn path.
Is twisted while being pressed by the airflow injected into the air . Accordingly, the rotation of the yarn and the fiber bundle being pulled out is prevented from propagating to the fiber bundle upstream of the pressing portion. That is, since a twist is applied to the fiber bundle in a state where a part thereof is pressed in the yarn path, a tension is applied to the fiber at the time of twisting and the fiber is twisted while the fiber is stretched. The pressing of the fiber bundle in the yarn path is
The yarn count is changed by the air flow.
Adjustment is not necessary when the yarn count is changed.
Easy to make. Furthermore, the seed yarn is inserted into the rotor during splicing.
Since the pressing means does not hurt the introduction, the seed yarn
Entrance is performed smoothly.

[0009]

(Embodiment 1) Hereinafter, the first embodiment of the present invention will be described.
An embodiment will be described with reference to FIGS. As shown in FIG. 1, a boss 2 is formed on a housing 1, and the fiber opened by a combing roller 3 is
One end of the fiber transport channel 5 leading to the inside is open. One end of a thread drawing passage 6 is opened at the center of the boss 2. The yarn pull-out passage 6 is connected to suction means (neither is shown) via a branch passage.

The rotor 4 is integrally rotatably fitted to the shaft 7 with its tip protruding into the rotor 4. At the tip of the shaft 7, a rotating body 8 formed in a substantially truncated cone shape having an inclination angle along the upper inner peripheral surface of the rotor 4 is provided.
However, it is supported rotatably relative to the rotor 4 via the bearing 9 in a state where a part of the peripheral surface thereof faces the vicinity of the fiber bundle 4a of the rotor 4. The rotating body 8 is formed such that a gap between the rotating body 8 and the end face of the boss 2 is as small as possible. One end of the rotating body 8 is formed in the vicinity of the fiber collecting portion 4a, and the other end is formed with a yarn path 10 opened at a position facing the yarn drawing path 6 so as to extend in the radial direction from the center of the rotating body 8. . Fiber bundle 4a of yarn path 10
As shown in FIG. 2, the end of the side is formed in an arc shape on the traveling direction side of the rotating body 8. A position corresponding to the end of the yarn path 10 near the fiber collecting portion 4 a is opened in the housing 1 on the rotating body 8, and the air in the rotor 4 is blown into the yarn path 10 based on the negative pressure in the yarn path 10. There is formed a through hole 11 for injecting into the hole. The through hole 11 constitutes a pneumatic pressing means for applying a pressing force to the fiber bundle F which is peeled off from the fiber bundle 4a and moves in the yarn path 10. In order to keep the rotating body 8 in balance during rotation, the side opposite to the yarn path 10 is the yarn path 10.
And a cutout corresponding to the through hole 11.

Next, the operation of the above-configured device will be described. At the time of the spinning operation, a suction effect of the suction device acts on the yarn pull-out passage 6 so that the inside of the yarn path 10 becomes more negative than the negative pressure in the rotor 4. The spread fiber sent into the rotor 4 from the fiber transport channel 5 slides along the fiber sliding portion 4b and is bundled in the fiber collecting portion 4a which is the maximum inner diameter portion. The fiber bundle F bundled in the fiber bundle 4 a
Is stripped from the fiber bundle 4a by the negative pressure acting on the fiber path 4a and guided into the yarn path 4a. The fiber bundle F is connected to the yarn Y drawn out by a draw-out roller (not shown), and is drawn out as the yarn Y while being twisted by the rotation of the rotating body 8 as the yarn Y is drawn out.

Since the pressure in the yarn path 10 is lower than the pressure in the rotor 4, air is injected from the through holes 11 into the yarn path 10. The fiber bundle F moving in the yarn path 10 is moved at a position facing the through-hole 11 by the action of the injected airflow.
Is pressed against the wall surface. That is, the fiber bundle F is partially pressed in the yarn path 10 and twisted in a straight state. Therefore, the fiber is twisted in a state where tension is applied to the fiber at the time of twisting and the fiber is stretched, so that the fiber is twisted straight, the yarn strength is increased, and a yarn with good tightness is obtained.

Further, the rotation of the yarn Y and the fiber bundle F being pulled out is prevented from propagating to the fiber bundle F upstream of the pressing position. Accordingly, the fiber bundle F from the fiber bundle 4a to the pressing position is hardly twisted. However, the fiber bundle F is sequentially moved from the fiber bundle 4a by the suction effect based on the negative pressure in the yarn path 10. As it is stripped, continuous spinning becomes possible. The rotator 8 rotates at a speed different from the rotation speed of the rotor 4 at a speed at which the fiber bundle F is peeled off from the fiber bundle 4a (slightly higher than the rotation speed of the rotor 4). or,
Among the fibers sent from the fiber transport channel 5 into the rotor 4, the fibers jumping into the twisting region become the fibers wound around the yarn Y being formed, which causes a poor yarn appearance. However, in the apparatus of the present invention, twisting is not performed in the fiber bundle section 4a and its vicinity unlike the related art,
The wound fiber is greatly reduced, and the yarn appearance is improved. (Embodiment 2) Next, a second embodiment will be described with reference to FIG.
This embodiment differs from the previous embodiment in that a device for applying false twist in the same direction as the actual twisting direction to the yarn Y passing through the yarn pull-out passage 6 is provided. The boss portion 2 has a thread drawing path 6
An injection hole 12 for injecting compressed air so as to generate a vortex in the real twisting direction of the yarn Y therein is formed so as to open at an eccentric position with respect to the yarn drawing passage 6. Then, at the time of spinning, a false twist in the same direction as the actual twist direction is added to the yarn Y in the yarn drawing passage 6 by the injection air from the injection hole 12. Therefore, since the twist propagates to the fiber bundle F in the yarn path 10, the number of twists of the fiber bundle F increases, and the yarn breakage is less likely to occur even when the drawing speed of the yarn Y is increased. Further, since the injection holes 12 are formed obliquely in the yarn drawing direction of the yarn drawing passage 6, the injected air does not flow into the yarn path 10 and exerts no adverse effect.

Note that the present invention is not limited to the above-described embodiments. For example, a mechanical seal or a labyrinth seal as shown in FIG. As shown in FIG. 4B, a protrusion 2a that is loosely inserted into the yarn path 10 may be formed at the tip of the boss 2. Further, as shown in FIG. 5A, the shape of the entrance portion of the yarn path 10 is such that the side corresponding to the fiber sliding portion 4b of the rotor 4 is widened, or the fiber bundle F is formed as shown in FIG. A portion corresponding to the side to be peeled off from the fiber bundle 4a may be formed wide, or the yarn path 10 may be slanted so as to extend not in the radial direction but in the rotation direction of the rotating body 8 as shown in FIG. It may be formed. In these cases, the fiber bundle F is easily sucked into the yarn path 10. In addition, as shown in FIG.
0 may be formed in a state of intersecting with the plane where the fiber bundle 4a exists. A configuration in which compressed air is sent instead of a configuration in which the negative pressure in the yarn path 10 is used as a pneumatic pressing means ;
May be.

[0015]

As described above in detail, according to the present invention, the fiber bundle stripped from the fiber bundle is subjected to a twisting action in a state where a part thereof is securely pressed in the yarn path, so that the fiber bundle is twisted. Since the fiber is twisted in a state where the tension is increased and the fiber is stretched, the fiber is twisted straight, and a tight-fitting yarn is formed, and a yarn having a high tensile strength is obtained. In addition, since there is no twisting area in the fiber bundle, the amount of the wound fiber wound around the yarn being formed is greatly reduced, and the yarn appearance is improved. Furthermore, the spun yarn
Since it is not necessary to adjust the pressing means according to the yarn count, spinning
The operation when changing the yarn count of the yarn becomes easy. In addition, piecing
The pressing means is an obstacle to the seed yarn introduction into the rotor at the time.
, The introduction of seed yarn can be performed smoothly.
You.

[Brief description of the drawings]

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

FIG. 2 is a partially enlarged sectional view taken along line AA of FIG.

FIG. 3 is a sectional view of a main part of a second embodiment.

FIG. 4 is a cross-sectional view showing a modified example of a seal structure between a boss and a rotating body.

FIG. 5 is a partial sectional view showing a modified example of the yarn path.

FIG. 6 is a partial sectional view showing a modified example of the yarn path.

[Explanation of symbols]

4 ... Rotor, 4a ... Fiber bundle part, 6 ... Yarn draw-out passage, 7
... Shaft, 8 ... rotating body, 10 ... thread path, 11 ... through-hole as pneumatic pressing means , F ... fiber bundle, Y ... thread.

Continued on the front page (72) Inventor Yukio Saito 2-1-1 Toyota-cho, Kariya-shi, Aichi Pref. Inside Toyota Industries Corporation (72) Inventor Kenji Ito 2-1-1, Toyota-cho, Kariya-shi, Aichi Pref. In-house (56) References JP-A-51-64034 (JP, A) JP-B 49-10295 (JP, B1) JP-B 50-31215 (JP, B1) (58) Fields investigated (Int. . ^6, DB name) D01H 4/10 D01H 4/40

Claims (1)

(57) [Claims] 1. A rotor having a shape in which at least a part thereof faces the vicinity of a fiber bundle portion of the rotor and a part of which corresponds to an end of a yarn pull-out passage is rotatable coaxially with the rotor. At one end of the rotating body, the other end is formed in the vicinity of the fiber bundle, and the other end is formed with a yarn path opened at a position facing the yarn drawing path, and is cut off from the fiber collection part in the middle of the yarn path. Jets into the yarn path to the fiber bundle moving in the yarn path
Pneumatic pressing means for applying pressing force by incoming air flow
Rotor-type open-end spinning machine equipped with .