JPH07118938A - Rotor type open end spinning frame - Google Patents

Abstract

PURPOSE:To enable the stable spinning of yarn twisted in a fiber bundle in a relatively straight stretched state of fiber constituting the fiber bundle. CONSTITUTION:This rotor type open end spinning frame is obtained by installing an independently and positively driven inner rotor 11 on the same axial line as that of an outer rotor 6 therein, forming a yarn passage 31 for taking out on the side opposite from a plane where a fiber bundle part (6a) is present to an opening end of the outer rotor 6 in the inner rotor 11, forming a part 35 for preventing twist from propagating a little toward the first end of the yarn passage 31 for taking out, an annular groove 30 passing through a position corresponding to the yarn passage 31 for taking out in the inner rotor 11 and a protruding ridge 37 having the tip side freely inserted into the annular ring 30 in the outer rotor 6 and regulating the angle of a gap (6) between the wall surface (30a) and the protruding ridge 37 from the direction of acting centrifugal force (f) to 90 deg. when cut with an imaginary plane, including the rotational center of the outer rotor 6 and inner rotor 11 and intersecting the part 35 for preventing twist from propagating.

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-type open-end spinning machine, the fiber bundle (fleece) bundled in the fiber bundle portion is peeled off from the fiber bundle portion and drawn out along the wall surface of the guide hole formed in the center of the navel. Then, the fiber bundle is pulled out while rotating along the inner wall surface of the guide hole as the rotor rotates, so that the fiber bundle is twisted.

However, the fiber bundles focused on the fiber focusing portion are merely attached to the inner wall surface of the fiber focusing portion by the action of the centrifugal force accompanying the rotation of the rotor. Therefore, the twist added to the fiber bundle drawn out while rotating along the guide hole propagates to the fiber bundle before being drawn out as a thread in a state of being attached to the fiber collecting portion, and the fiber bundle inside the fiber collecting portion rotates. As a result, there is a problem in that the fibers are not twisted straight and the yarn strength is not increased because the fibers are twisted in a state where sufficient tension is not obtained during twisting and the fibers are not sufficiently stretched.

In order to solve this problem, Japanese Patent Laid-Open No. 5-8
An apparatus as shown in FIG. 12 is proposed in Japanese Patent No. 6512. In this device, an inner rotor 92, which is positively driven independently of the outer rotor 91, is provided inside the outer rotor 91 having a fiber converging portion 91a.
The inner rotor 92 is formed with a yarn path 95 for guiding the fiber bundle (yarn) from the vicinity of the fiber collecting portion 91a to a position facing the yarn drawing passage 94 formed in the navel 93. A twist propagation preventing portion 96 is provided at the end of the yarn path 95 on the fiber collecting portion 91a side.

In this apparatus, the fiber bundle F collected in the fiber collecting portion 91a is stripped off from the fiber collecting portion 91a and guided to the yarn path 95 of the inner rotor 92, and the outer rotor 9
The yarn Y is drawn out while being twisted by the rotation of the inner rotor 92 that rotates at substantially the same speed as 1. When twisting is applied to the fiber bundle F stripped off from the fiber collecting portion 91a,
Due to the action of the twist propagation preventing portion 96, the twist applied to the fiber bundle F is suppressed from propagating to the fiber bundle F upstream (on the fiber concentrating portion side) from the relevant portion. Then, the fiber bundle F is twisted in a state in which tension is applied to the fibers during twisting and the fibers are stretched. As a result, the fibers constituting the fiber bundle are twisted into the yarn in a state where they are relatively straightly stretched, and a yarn having high tensile strength can be manufactured.

[0006]

However, in the above-mentioned conventional device, the fiber bundle F is directly drawn from the fiber collecting portion 91a toward the center side of the outer rotor 91 and guided to the inlet portion of the yarn path 95. Therefore, the fiber bundle is pulled out in a state in which the centrifugal force acting by the rotation of the outer rotor 91 is exerted as a force against the pulling out of the fiber bundle that is being pulled out. That is, a large tension acts on the fiber bundle that is not twisted. Since the centrifugal force is proportional to the square of the angular velocity, when the outer rotor 91 is rotated at a high speed, the untwisted fiber bundle is withdrawn against the centrifugal force directly from the fiber focusing portion toward the center side of the outer rotor 91. Will be difficult.

As a device for eliminating this inconvenience, the applicant of the present application has considered a device in which the inner rotor 92 is provided on the side opposite to the open end of the outer rotor 91 from the fiber converging portion 91a as shown in FIG. In this device, the fiber bundle F is drawn out toward the inner rotor 92 side along the wall surface of the outer rotor 91, and then the drawing direction is changed to the center side of the outer rotor 91 at the position of the twist propagation preventing portion 96. . As a result, the tension required to move the untwisted fiber bundle F becomes a magnitude that overcomes the centrifugal force component of the wall in the wall direction and the frictional resistance between the fiber bundle F and the wall surface. It is a small value compared to. Then, even when the outer rotor 91 is rotated at a high speed, the fiber bundle F can be pulled out smoothly.

However, a gap δ between the outer rotor 91 and the inner rotor 92 is provided in the middle of the drawing path of the fiber bundle F.
Exists, and the gap δ has a predetermined width along the circumferential direction and in a plane orthogonal to the center of rotation of both rotors. Then, for the fibers existing at the positions corresponding to the gap δ,
Centrifugal force acts in the direction to push the fiber into the gap δ.
As a result, when the centrifugal force is large, that is, when the outer rotor 6 is rotated at a high speed, when the fiber moves from the outer rotor 91 to the inner rotor 92, the centrifugal force acting on the fiber causes the fiber to enter the gap δ and break the yarn. May be

The present invention has been made in view of the above problems, and its object is to provide a rotor type equipped with an inner rotor capable of smoothly drawing out a fiber bundle even when the outer rotor is rotated at a high speed. To provide open-end spinning frame.

[0010]

In order to achieve the above object, according to the invention of claim 1, the outer rotor is provided in an outer rotor having a fiber converging portion for concentrating fibers supplied in an opened state. In the rotor type open-end spinning machine in which the inner rotor is provided, which is positively driven independently of the outer end of the outer rotor, and the inner rotor corresponds to the end of the yarn drawing passage, A gap that exists between the outer rotor and the inner rotor when a twist propagation prevention unit is provided on the side opposite to the end and the outer rotor and the inner rotor are cut along a virtual plane that includes the center of rotation and intersects the twist propagation prevention unit. The angle formed by the gap in which the opening end exists in the movement path of the fiber bundle from the fiber collecting portion to the twist propagation preventing portion and the direction in which the centrifugal force acts is 9 It was to be equal to or greater than degrees.

According to the second aspect of the invention, the gap where the opening end exists in the path from the fiber collecting section to the twist propagation preventing section has an annular wall surface formed on the inner rotor and the outer rotor. And a tip having a surface extending toward the bottom side of the outer rotor on the inner side of the annular wall surface and having a surface facing the annular wall surface.

Further, in the invention according to claim 3, in the outer rotor having the fiber concentrating portion for concentrating the fibers supplied in the opened state, the outer rotor is positively driven independently and partly In a rotor-type open-end spinning machine provided with an inner rotor corresponding to the end of the yarn drawing passage, a twist propagation preventing portion is provided on the inner rotor opposite to the open end of the outer rotor with respect to the plane where the fiber focusing portion exists. At the same time, a gap existing between the outer rotor and the inner rotor, which is formed when the outer rotor and the inner rotor are cut along a virtual plane that includes the rotation center of the outer rotor and the inner rotor and intersects the twist propagation preventing portion, It was arranged between the open end and the fiber bundle.

[0013]

In the device of the present invention, the spread fibers fed from the fiber transport channel into the outer rotor slide along the wall surface of the rotor and are bundled in the fiber bundle. 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 twisted by the rotation of the inner rotor and drawn out as a yarn from the yarn drawing passage. The fiber bundles stripped from the fiber bundle move along the wall surface of the outer rotor toward the yarn path of the inner rotor on the side opposite to the open end of the outer rotor, and the twist propagation prevention portion of the yarn path pulls out the fiber bundle. Is changed so as to face the center side of the outer rotor.

According to the invention described in claims 1 and 2, the fiber bundle crosses the open end of the gap existing between the outer rotor and the inner rotor while moving from the fiber collecting portion toward the twist propagation preventing portion. When the outer rotor and the inner rotor are cut along a virtual plane that includes the center of rotation and intersects the twist propagation preventing portion, the gap is formed so that the angle formed by the direction in which the centrifugal force acts is 90 degrees or more. Therefore, the centrifugal force acting on the fiber bundle does not generate a force that pushes the fibers toward the back of the gap. Therefore, the fibers do not enter the gap due to the centrifugal force acting on the fibers, and the yarn breakage due to the fibers entering the gap is prevented.

According to a third aspect of the present invention, the outer rotor and the inner rotor are formed between the outer rotor and the inner rotor, which are formed when the outer rotor and the inner rotor are cut along a virtual plane that includes the center of rotation and intersects the twist propagation preventing portion. The open end of the existing gap is located on the side opposite to the fiber focusing portion with respect to the twist propagation preventing portion. Therefore, since there is no gap between the outer rotor and the inner rotor in the middle of the fiber bundle moving path that is stripped from the fiber collecting portion and moves to the twist propagation preventing portion,
No yarn breakage due to fibers entering the gap occurs.

[0016]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 5, a pair of rotating shafts 2 (only one of which is shown) are supported by a base 1 fixed to a machine frame (not shown) in parallel with each other via bearings 3. 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 (not shown). A hollow rotor shaft 7 having an outer rotor 6 fitted and fixed at its tip is supported in the wedge-shaped recess 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. An inner rotor 11 is fitted and fixed to the tip of the shaft 10 so as to rotate integrally therewith, and a base end of the shaft 10 is in contact with a thrust bearing 12. Like the drive belt 8, the shaft 10 is provided with a drive belt 13 provided in common for a plurality of weights.
The shaft 10 is pressed and contacted while traveling in a direction orthogonal to 0, and the shaft 10 is rotationally driven by traveling of the drive belt 13. The thrust bearing 12 includes a case 14 in which lubricating oil O is stored, balls 16 supported by an oil supply member 15 made of felt, and an adjusting screw 15 a that abuts the ball 16 from the opposite side of the shaft 10.

A boss portion 18 is formed in the housing 17 disposed at a position facing the open side of the outer rotor 6 so as to project into the outer 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 outer rotor 6. A casing 23 that covers the outer rotor 6 is disposed at a position facing the housing 17 so as to abut the housing end surface via an O-ring 24. The casing 23 is connected to a negative pressure source (not shown) by a pipe. It is connected via 25. Since the inner rotor 11 improves the sealing performance between the boss portion 18 and the inner rotor 11, the shaft 1 is designed so that the gap between the inner rotor 11 and the end surface of the boss portion 18 is as small as possible.
It is fixed at 0.

At the center of the boss portion 18, a navel 27 having one end of the yarn drawing passage 26 opened is arranged. The yarn pipe 28 is arranged so as to intersect with the center line of the navel 27, and the end portion 2 of the yarn pipe 28 near the navel 27 is arranged.
8a is the twisting start point of the yarn. The above-mentioned structure is basically the same as that disclosed in JP-A-5-86512 except for the structures of the outer rotor 6 and the inner rotor 11.

As shown in FIG. 1, the outer rotor 6 has a fiber collecting portion 6a on the side opposite to the opening end with the fiber collecting portion 6a interposed therebetween.
A housing portion 6b having a diameter larger than that of a is formed. The outer rotor 6 is composed of a main body 6A in which the housing portion 6b is formed and is fitted to the rotor shaft 7, and an annular component 6B in which the fiber focusing portion 6a is formed and which is fitted and fixed to the main body 6A by press fitting or the like. Has been done.

As shown in FIG. 3, the inner rotor 11 is formed in a disk shape whose outer diameter is larger than the diameter of the fiber converging portion 6a (shown by the chain line), and is accommodated in the accommodating portion 6b, and then is attached to the shaft 10. It is fitted and fixed. Inner rotor 1
1 has a navel 27 in the central portion on the side corresponding to the boss portion 18.
The concave portion 29 into which is loosely fitted is formed with a circular annular groove 30 at the peripheral edge portion. The navel 27 is arranged such that the tip thereof is located on the bottom side (opposite to the opening side) of the outer rotor 6 with respect to an imaginary plane including the fiber collecting portion 6a.

The inner peripheral wall surface 30a of the annular groove 30 is formed so as to be perpendicular to a plane orthogonal to the rotation axis of the inner rotor 11. The inner rotor 11 is formed with a drawing yarn path 31 that guides the fiber bundle F drawn from the fiber collecting portion 6a to the yarn drawing passage 26 during normal spinning so as to extend in the radial direction of the inner rotor 11. The drawing yarn path 31 has a first end opening toward the wall surface 30a of the annular groove 30 and a second end forming the recess 2
It has an opening on the peripheral surface of 9.

On the rear side of the drawing yarn path 31 in the rotation direction of the inner rotor 11, an introducing yarn path 32 for introducing a seed yarn at the time of yarn splicing extends along the drawing yarn path 31 and communicates with the drawing yarn path 31. Is formed. Introduction thread 32
Is formed as a recess 33 which is continuous with the recess 29 and which is open on the opening side of the outer rotor 6. Recess 3
The outer peripheral wall surface 33a of the inner rotor 3 of FIG. 3 is formed so that the portion near the annular groove 30 extends obliquely toward the center side of the inner rotor 11.

The partition wall 34 which partitions the drawing yarn path 31 from the space on the opening side of the outer rotor 6 covers the inner portion of the inner rotor 1 in a state of covering the part of the opening of the recess 33 close to the drawing yarn path 31.
1 is formed so as to project to the rear side in the rotation direction. A substantially semi-cylindrical twist propagation preventing portion 35 is formed on the partition wall 34 on the first end side of the drawing yarn path 31. The first of the drawing yarn path 31 at the position corresponding to the twist propagation preventing portion 35
The end portion 31a is formed in a gap slightly narrower than the diameter of the spun yarn.

As shown in FIG. 2, the partition wall 34 is formed so that the thickness of the portion facing the introduction yarn path 32 gradually decreases from the drawing yarn path 31 side toward the tip side. Further, the portion of the partition wall 34 near the outer periphery of the inner rotor 11 is viewed from the opening side of the outer rotor 6 as shown in FIG. 3 from the first end 31a of the drawing yarn path 31 in the rotation direction of the inner rotor 11. It is formed so as to extend obliquely toward the rotation center side of the inner rotor 11 so that the opening of the introduction yarn path 32 becomes larger toward the rear side. That is, the partition wall 34 is formed with a guide surface 36 that guides the yarn Y toward the twist propagation preventing portion 35 so as to extend rearward of the twist propagation preventing portion 35 in the rotation direction of the inner rotor 11.

In the outer rotor 6, a ridge 37 extends toward the bottom of the outer rotor 6 from the fiber converging portion 6a, and the tip of the ridge 37 extends toward the bottom of the outer rotor 6, and the annular groove 3 is formed.
It is formed so as to be loosely inserted in 0. The ridge 37 has a triangular cross section, and a surface 37a facing the outer wall surface 30a of the annular groove 30 is formed parallel to the wall surface 30a. A gap δ between the wall surface 30a and the surface 37a is located in the movement path of the fiber bundle F from the fiber concentrating portion 6a to the twist propagation preventing portion 35 in the gap existing between the outer rotor 6 and the inner rotor 11. It is the existing gap δ.
Therefore, in the virtual cutting plane that includes the rotation centers of the outer rotor 6 and the inner rotor 11 and intersects with the twist propagation preventing portion 35, the angle formed by the gap δ and the direction in which the centrifugal force f acts (hereinafter, simply the gap δ and the centrifugal force). (It is called the angle formed by the direction of action of) is 90 degrees. Further, the surface of the protrusion 37 corresponding to the inner surface of the annular groove 30 is the bottom of the annular groove 30 and the wall surface 30.
The outer rotor 6 is oriented toward the boundary with a, that is, in the direction in which the fibers move from the fiber collecting portion 6a to the twist propagation preventing portion 35.
Is formed so as to face the outside.

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 outer rotor 6 and the inner rotor 11 are rotationally driven in the same direction via the rotor shaft 7 and the shaft 10, respectively. The inner rotor 11 rotates at a speed slightly slower than the stripping speed of the fiber bundle F from the fiber collecting portion 6a (slightly faster than the rotation speed of the outer rotor 6). In this state, the fiber is opened by the action of the combing roller 21 and the fiber is transferred from the fiber transport channel 22 to the outer rotor 6
The spread fibers fed inside slide along the inner wall surface of the outer rotor 6 and are bundled in the fiber bundle 6a.

The fiber bundle F collected in the fiber collecting portion 6a is pulled out from the fiber collecting portion 6a to the inner rotor 11 side along the wall surface of the outer rotor 6. Then, the yarn is wound around the twist propagation preventing portion 35, the drawing direction is changed, is guided to the navel 27 through the drawing yarn path 31, is twisted by the rotation of the inner rotor 11, and is drawn as the yarn Y. That the gap between the first end portion 31a of the drawing yarn path 31 at the position corresponding to the twist propagation preventing portion 35 is narrow,
By pulling out the fiber bundle F while being wound around the twist propagation preventing portion 35, the rotation of the fiber bundle F is suppressed at the location. That is, the rotation of the yarn Y and the fiber bundle F that are pulled out while being twisted is suppressed from propagating to the fiber bundle F upstream from the position corresponding to the twist propagation preventing portion 35. That is, twisting is stopped at a position corresponding to the twist propagation preventing portion 35. Therefore, when the fiber bundle F is twisted, the tension is applied to the fibers and the fibers are stretched, and the fibers are twisted in a straight state, the fibers are twisted in a straight line, the yarn strength is increased, and a tight yarn is obtained. To be

When the fiber bundle F is pulled out directly from the fiber collecting portion 6a toward the center of the outer rotor 6, the centrifugal force acting by the rotation of the outer rotor 6 resists the pulling-out of the fiber bundle F which is being pulled out. The fiber bundle F is pulled out while being applied as a force for That is, a large tension acts on the fiber bundle F which is not twisted. Since the centrifugal force is proportional to the square of the angular velocity, when the outer rotor 6 is rotated at a high speed, the untwisted fiber bundle F is resisted against the centrifugal force from the fiber concentrating portion 6a directly toward the center side of the outer rotor 6. It will be difficult to pull out.

However, in the device according to the present invention, the fiber bundling portion 6a is used.
The fiber bundle F bundled in is untwisted,
The outer rotor 6 extends to a position corresponding to the twist propagation preventing portion 35.
And slide on the wall surface of the inner rotor 11. Therefore,
The tension required to move the fiber bundle F may be large enough to overcome the component of centrifugal force in the wall direction and the frictional resistance between the fiber bundle F and the wall surface.

As shown in FIG. 4, the centrifugal force acting on the fiber bundle F is f, the coefficient of friction between the fiber bundle F and the wall surface is μ, and the angle between the direction perpendicular to the wall surface and the direction in which the centrifugal force acts is θ.
Then, the drag force N1 acting on the fiber bundle F and the force N2 acting in parallel with the wall surface are expressed by the following equations.

N1 = f × (cos θ), N2 = f × (sin θ) Therefore, the tension T required to move the fiber bundle F is given by the following equation. T = f × (sin θ) + μ × f × (cos θ) The friction coefficient μ is 10 ⁻¹ , and cos θ and sin θ are also 1
Since the tension T is smaller than the centrifugal force f, the tension T is smaller than that of the centrifugal force f, and even if the fiber bundle F is not twisted, the fiber bundle is smoothly moved from the fiber collecting portion 6a to a position corresponding to the twist propagation preventing portion 35. . At the position where the fiber bundle F is pulled out from the twist propagation preventing portion 33 opposite to the centrifugal force direction to the navel 27, the fiber bundle F is twisted, so that the outer rotor 6 rotates at high speed. Even when the fiber bundle F is pulled, the fiber bundle F can be pulled out smoothly.

The fiber bundle F crosses the open end of the gap δ existing between the outer rotor 6 and the inner rotor 11 while moving from the fiber collecting portion 6a toward the twist propagation preventing portion 35. The angle between the gap δ and the direction in which the centrifugal force acts is 9
Since it is formed so as to be 0 degree, the centrifugal force f acting on the fiber bundle F does not generate a component force that pushes the fibers toward the back of the gap δ. Therefore, even if the fiber bundle F crosses the open end of the gap δ, the fibers do not enter the gap δ due to the centrifugal force f that acts on the fibers, and the yarn breakage due to the fibers entering the gap δ does not occur.

Next, the operation at the time of yarn splicing will be described. At the time of yarn splicing, the rotation speed of the inner rotor 11 is set to be the same as the stripping speed of the fiber bundle F from the fiber collecting portion 6a and slightly higher than the rotation speed of the outer rotor 6. Then, the outer rotor 6 and the inner rotor 11 are rotationally driven at a speed slower than that during normal spinning. In this state, the seed yarn is yarn pipe 28.
Is inserted into the yarn drawing passage 26. The tip of the seed yarn reaches the fiber converging portion 6a by the action of the centrifugal force and the air flow from the yarn drawing passage 26 into the outer rotor 6 based on the negative pressure in the outer rotor 6. Next, when a draw-out roller (not shown) is driven in the forward direction to draw out the seed yarn, the fiber bundle F bundled in the fiber collecting portion 6a is wound around the end portion of the seed yarn and peeled off from the fiber collecting portion 6a. Be withdrawn.

At the initial stage of yarn splicing, the yarn Y is not engaged with the twist propagation preventing portion 35 as shown by A in FIG.
Is spun in a state of being guided to the navel 27 through the introduction yarn path 32 of the inner rotor 11. Next, the rotation speed of the inner rotor 11 is changed so as to be lower than the stripping speed of the fiber bundle F. As a result, the position of the stripping point of the fiber bundle F relatively moves to the front side in the rotation direction of the inner rotor 11, and the fiber bundle F (yarn Y) also moves in the same direction. During the movement of the fiber bundle F, the yarn Y is brought into a state of engaging with the peripheral edge of the partition wall 34. Since the guide surface 36 that extends obliquely toward the twist propagation preventing portion 35 is formed on the side of the partition wall 34 facing the introduction yarn path 32, the yarn Y is guided from the state of engaging with the peripheral edge of the partition wall 34. It moves smoothly along the surface 36. And FIG.
After the state indicated by B in FIG. 1, the state is brought into engagement with the twist propagation preventing portion 35 as shown in FIGS. After that, the rotation speeds of the outer rotor 6 and the inner rotor 11 are increased to the normal spinning speed, and the yarn Y is spun in a state of being pulled out while engaging with the twist propagation preventing portion 35.

(Second Embodiment) Next, a second embodiment will be described with reference to FIG. In this embodiment, the shapes of the annular groove 30 and the protrusions 37 are different from those of the previous embodiment, and the other structures are the same. The annular groove 30 is formed such that the diameter of the wall surface 30 a becomes smaller toward the opening end side of the outer rotor 6.
The wall surface 33a of the recess 33 is formed so as to be continuous with the same inclination as the wall surface 30a. The protrusion 37 is formed so that the surface 37a is parallel to the wall surface 30a. That is, in this embodiment, the angle formed by the gap δ and the direction in which the centrifugal force acts is an obtuse angle.

Therefore, also in this embodiment, the same operational effects as those of the above-mentioned embodiment are exhibited. Further, in this embodiment, since the angle formed by the gap δ and the direction in which the centrifugal force acts is an obtuse angle, the centrifugal force f acting on the fibers at the position corresponding to the gap δ causes the fibers to flow from the wall surface 30a side to the wall surface 33a. Acts as if pushed to the side. That is, there is no possibility that the centrifugal force f pushes the fibers toward the inner side of the gap δ, and the centrifugal force f is the fiber bundle F.
Assists the movement toward the twist propagation preventing portion 35.

(Third Embodiment) Next, a third embodiment will be described with reference to FIG. In this embodiment, the fiber bundle F has the twist propagation preventing portion 3
5 is that the direction of movement toward 5 is toward the center of the inner rotor 11, and that there is no gap between the outer rotor 6 and the inner rotor 11 in the path from the fiber converging portion 6a to the twist propagation preventing portion 35. Different from the example.

The bottom of the annular groove 30 has a twist propagation preventing portion 35.
The groove width is formed so as to be closer to the bottom side of the outer rotor 6, and the groove width increases toward the open end side of the outer rotor 6. Protrusions 37 formed on the outer rotor 6
Is formed so as to extend toward the center side of the outer rotor 6, the tip of which is close to the twist propagation preventing portion 35, and the gap between the twist propagation preventing portion 35 is formed to be slightly smaller than the diameter of the spun yarn. ing. The opening end of the gap δ existing between the outer rotor 6 and the inner rotor 11 which is formed when the outer rotor 6 and the inner rotor 11 are cut along a virtual plane including the rotation center and intersecting the twist propagation preventing portion 35 is , Which is located on the side opposite to the fiber converging portion 6a with respect to the twist propagation preventing portion 35.

Therefore, in this embodiment, the fiber bundle F pulled out from the fiber collecting portion 6a moves along the second surface 37b of the ridge 37 to reach the twist propagation preventing portion 35, and the twist propagation preventing portion 35. Then, the moving direction is changed to the direction orthogonal to the rotation axis of the inner rotor 11. That is, since there is no gap between the outer rotor 6 and the inner rotor 11 in the movement path of the untwisted fiber bundle F, there is no possibility that the fibers enter the gap due to the action of centrifugal force during the movement of the fiber bundle F. Absent.

The present invention is not limited to the above-mentioned embodiments, and for example, the recess 33 in the first embodiment is used.
The wall surface 33a may be formed so as to be perpendicular to the plane orthogonal to the rotation axis of the inner rotor 11, as shown in FIG. When the twist propagation preventing portion 35 is provided closer to the center of the inner rotor 11 than the fiber converging portion 6a,
As shown in FIG. 8B, the protrusion 38 may be provided on the inner rotor 11 without providing the protrusion on the outer rotor 6.

The twist propagation preventing portion 35 may be separated from the partition wall 34. For example, as shown in FIG. 9, a wall surface 31 of the drawing yarn path 31 on the front side in the rotation direction of the inner rotor 11.
The twist propagation preventing portion 35 may be provided in b. Twist propagation prevention unit 3
Reference numeral 5 is composed of a support shaft 39 protruding from the wall surface 31b and a cylinder 40 loosely fitted to the support shaft 39, and a truncated cone-shaped guide portion 39a is formed at the tip of the support shaft 39. The partition wall 34 has an opening 34 at a position corresponding to the twist propagation preventing portion 35.
a is formed. In this configuration, the inner rotor 11
The cylinder 40 is rotated by the action of centrifugal force,
The twisting function is achieved by being urged toward the first end 31a side of the drawing yarn path 31 and gripping the fiber bundle F in cooperation with the first end 31a. Further, since the cylinder 40 can move freely, it is easy to follow the change in the thickness of the fiber bundle F.

Further, in the third embodiment, the twist propagation preventing portion 35 is used.
The inner surface of the ridge 37 opposed to may be formed so as to extend substantially equilibrium with the rotor shaft as shown in FIG.
Further, as shown in FIG. 11, the twist propagation preventing portion 35 may be arranged outside the fiber collecting portion 6a so that the tip of the protrusion 37 reaches the bottom side of the outer rotor 6 from the twist propagation preventing portion 35. Good. That is, the position of the twist propagation preventing portion 35 is not limited to the inside of the fiber converging portion 6a, but may be disposed between the opening end of the gap δ and the fiber converging portion 6a.

The shape of the inner rotor 11 is not limited to the disk shape, and may be any shape that can maintain the dynamic balance during rotation. Further, a large number of streaks may be formed on the circumferential surface of the twist propagation preventing portion 33 along the circumferential direction.

[0045]

As described in detail above, according to the present invention, the fiber bundle can be smoothly drawn out even when the outer rotor is rotated at a high speed, and the fibers constituting the fiber bundle are relatively straightened. A yarn having a large tensile strength twisted in a twisted state can be stably spun at high speed.

[Brief description of drawings]

1A and 1B show a first embodiment embodying the present invention, FIG. 1A is a partial sectional view, and FIG. 1B is a partially enlarged view thereof.

FIG. 2 is a partial schematic perspective view of an inner rotor.

FIG. 3 is a partially omitted view showing the relationship between the inner rotor and the yarn as viewed from the opening side of the outer rotor.

FIG. 4 is a schematic diagram showing a relationship of forces acting on a fiber bundle.

FIG. 5 is a partially cutaway schematic side view of the open-end spinning frame.

FIG. 6 is a partial sectional view of a second embodiment.

FIG. 7 is a partial sectional view of a third embodiment.

FIG. 8A is a partial sectional view of a modified example, and FIG. 8B is a partial sectional view of another modified example.

FIG. 9 is a partial schematic perspective view of another modification.

FIG. 10 is a partial cross-sectional view of another modification.

FIG. 11 is a partial cross-sectional view of another modification.

FIG. 12 is a partial cross-sectional view of a conventional device.

FIG. 13 is a partial cross-sectional view of a device for drawing a fiber bundle along an inner wall surface of an outer rotor to a twist propagation preventing portion.

[Explanation of symbols]

Reference numeral 6 ... Outer rotor, 6a ... Fiber collecting portion, 11 ... Inner rotor, 26 ... Yarn drawing passage, 27 ... Navel, 30
... annular groove, 30a ... wall surface, 34 ... partition wall, 35 ... twist propagation preventing portion, 36 ... guide surface, 37 ... ridge, 37a ... surface, δ ...
Gap, f ... centrifugal force, F ... fiber bundle, Y ... thread.

Claims (3)

[Claims] 1. An outer rotor having a fiber concentrating portion for concentrating fibers supplied in an opened state is positively driven independently of the outer rotor and part of the outer rotor corresponds to an end of a yarn drawing passage. In the rotor-type open-end spinning machine provided with the inner rotor, a twist propagation preventing portion is provided on the side opposite to the opening end of the outer rotor from the plane where the fiber concentrating portion is present in the inner rotor,
When the outer rotor and the inner rotor are cut along a virtual plane including the center of rotation and intersecting the twist propagation preventing portion,
Among the gaps existing between the outer rotor and the inner rotor, the angle between the direction in which the centrifugal force acts and the gap in which the opening end exists in the movement path of the fiber bundle from the fiber collecting portion to the twist propagation preventing portion is Rotor-type open-end spinning machine designed to be 90 degrees or more. 2. The gap where the opening end exists in the path from the fiber converging portion to the twist propagation preventing portion is formed in the inner wall of the inner rotor and the inner wall of the outer rotor, and the tip is The rotor-type open-end spinning machine according to claim 1, wherein the rotor-type open-end spinning machine is configured by a ridge that extends toward the bottom side of the outer rotor inside the annular wall surface and has a surface facing the annular wall surface. 3. An outer rotor having a fiber concentrating portion for concentrating fibers supplied in an opened state is actively driven independently of the outer rotor and part of the outer rotor corresponds to an end of the yarn drawing passage. In the rotor-type open-end spinning machine provided with an inner rotor, a twist propagation preventing portion is provided on the inner rotor side opposite to the opening end of the outer rotor with respect to the plane where the fiber focusing portion exists, and the twist propagation preventing portion is An opening end of a gap existing between the outer rotor and the inner rotor, which is formed when the outer rotor and the inner rotor are cut by a virtual plane including the rotation center and intersecting the twist propagation preventing portion,
A rotor-type open-end spinning machine arranged between the fiber converging unit.