JPH08113832A - Rotor type open end spinning frame - Google Patents

Abstract

PURPOSE: To enable an increase in force to press a fiber bundle in a fiber bundling part thereto, suppress the transmission of twists to the fiber bundle on the upstream side of a stripping point and prevent a fiber from loosely winding around the fiber bundle. CONSTITUTION: This rotor type open end spinning frame is obtained by installing an inner rotor 11, positively driven independently of an outer rotor 6, partially opposite to the vicinity of a fiber bundling part 6a of the rotor 6 and having a shape partially corresponding to an end of a yarn takeout passage 23 on the same axial line as that of the outer rotor 6 therein, forming an opening 31 for introducing a fiber bundle in the inner rotor 11, guiding the fiber bundle F from the vicinity of the fiber bundling part 6a to a position opposite to the yarn takeout passage 23 and forming many air holes 35 making the fiber bundling part 6a communicate with the outer surface of the outer rotor 6 so as to extend in the direction intersecting a shaft 10 at right angles.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer rotor having a fiber concentrating portion for concentrating fibers supplied in an opened state, which is positively driven independently of the outer rotor and partially has a yarn drawing passage. The present invention relates to a rotor type open-end spinning machine provided with an inner rotor corresponding to the end of the rotor.

[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 bundle focused on the fiber focusing portion is stripped from the fiber focusing portion and drawn out along the wall surface of the guide hole formed at the center of the navel, Due to the friction with the wall surface, the fiber bundle is pulled out while rotating along the inner wall surface of the guide hole as the rotor rotates, and the fiber bundle is twisted.

The open-end spinning frame has better productivity than the ring spinning frame. However, in the open-end spinning machine, some twist is transmitted to the fiber bundles upstream of the stripping point of the fiber bundles bundled in the fiber bundle. as a result,
The disadvantage is that the non-restraining fibers that slide on the inner wall surface of the rotor toward the fiber bundles around the rotating fiber bundles wind loosely and disturb the yarn appearance, resulting in poor texture when formed into a cloth. There is.

As a device for eliminating the drawbacks of conventional open-end yarns, a rotor (outer rotor) having a fiber concentrating portion has an extraction hole for withdrawing the fiber bundle converging in the fiber concentrating portion and the rotor. A device provided with a draft rotor (inner rotor) that performs differential rotation has been proposed (for example, JP-A-51-640).
34 publication). This device, as shown in FIG.
An inner rotor 72 is concentrically provided inside the outer rotor 71. Then, the inner rotor 72 rotates slightly faster than the outer rotor 71, and the fiber bundle F is drawn out through the draw-out hole 73 formed in the inner rotor 72, thereby spinning while giving a draft to the fiber bundle F. Further, as shown in FIG. 19 (b), in the above publication, a small disc 74 is attached to the inner rotor 72, which revolves and rotates while crimping to the fiber bundle F focused on the fiber focusing portion 71a. An apparatus for spinning while drafting while suppressing the floating is disclosed.

An open-end spinning machine not equipped with an inner rotor is disclosed in which a hole for discharging impurities and dust is provided in the vicinity of the fiber focusing portion of the rotor (Japanese Patent Laid-Open No. 51-149936). Also, JP-A-50-118
In Japanese Patent No. 036, a large number of openings are formed at positions corresponding to the fiber converging portion (trough), and pins are arranged at positions corresponding to the openings, and non-spinnable fibers and dust passing through the gaps between the pins are discharged from the openings. A configuration is disclosed.

[0006]

DISCLOSURE OF THE INVENTION Problem to be Solved by the Invention Inner rotor 7
In the device provided with 2, when the twist is transmitted from the inlet of the inner rotor 72 to the fiber bundle F of the fiber collecting portion 71a of the outer rotor 71, the twist should ideally stop at the stripping point P. However, the fiber bundle F upstream from the stripping point P is only pressed against the fiber collecting portion 71a by the centrifugal force acting on itself, and the drag force that prevents the twist propagation to the fiber bundle F in the fiber collecting portion 71a is the outer. It is only the frictional force between the wall surface of the rotor 71 and the fibers. Therefore, it is necessary to balance the frictional force and the twisting torque and stop the twisting at the stripping point P. However, the rotor speed, the number of spun yarn,
If the diameter of the rotor, the surface roughness of the fiber converging portion, and the like change even a little, the balance between the frictional force and the twisting torque is disturbed, and if the twisting is transmitted upstream from the stripping point P, the above-mentioned inconvenience occurs. If the twist does not reach the stripping point P, yarn breakage is likely to occur.

Further, in the case of the device shown in FIG. 19B provided with the small disc 74, the stripping point P is caused by the action of the small disc 74.
Propagation of the twist to the fiber bundle F on the upstream side is prevented. However, if the contact pressure between the small disk 74 and the outer rotor 71 is large, the inner rotor 72 causes the outer rotor 71 to rotate, and the contact pressure is applied so as to rotate the inner rotor 72 and the outer rotor 71 at a predetermined speed difference. Difficult to manage. In order to rotate both rotors 71, 72 at a predetermined speed difference without strict contact pressure management, it is necessary to increase the drive torque of the outer rotor 71, which increases the drive energy and the size of the drive motor. There's a problem. Further, since the small disc 74 rotates while coming into contact with the outer rotor 71, the small disc 74 or the outer rotor 71 rotates.
There is also a problem that it is easily worn.

Further, the apparatus disclosed in Japanese Patent Laid-Open No. 50-118036 discloses that a hole is formed in the vicinity of the fiber focusing portion in order to discharge impurities and dust. However, these are for the purpose of exhausting impurities and dust from the rotor, and are used to press the fiber bundle in the fiber bundle strongly against the fiber bundle and prevent rotation of the fiber bundle upstream from the stripping point. The idea of doing is not suggested.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to increase the force for pressing the fiber bundle in the fiber bundle to the fiber bundle, and the fiber bundle upstream from the stripping point. Manufactures a yarn that suppresses the transmission of the twist to the fiber and prevents loose wrapping of the fiber around the fiber bundle even if the twist is transmitted upstream from the stripping point to improve the appearance of the yarn and the texture of the fabric. It is to provide a rotor-type open-end spinning machine capable of performing the above.

[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. A rotor-type open in which an inner rotor is provided which is positively driven independently of the other and has a portion corresponding to the end of the yarn drawing passage and having an opening for introducing a fiber bundle facing the fiber collecting portion. In the end spinning machine, at the position corresponding to the fiber focusing portion of the outer rotor, a large number of ventilation holes are formed to connect the fiber focusing portion to the outer surface of the outer rotor or the negative pressure portion, and the fiber focusing portion is operated during the operation of the spinning machine. The fiber bundles bundled in the above were pressed against the fiber bundle portion side.

According to a second aspect of the present invention, the outer rotor is formed with an annular negative pressure portion outside the fiber converging portion and an exhaust hole is formed so as to connect the negative pressure portion and the outside of the outer rotor. Is formed, the vent hole is formed so as to communicate the fiber focusing portion and the negative pressure portion, the inner rotor has a cover portion that covers the vent hole from the negative pressure portion side in the vicinity of the opening for introducing the fiber bundle. It is provided.

According to a third aspect of the present invention, in the first aspect of the present invention, the outer rotor is formed with an annular negative pressure portion outside the fiber converging portion, and the negative pressure portion and the outside of the outer rotor. A large number of exhaust holes are formed so as to communicate with, and a flange that covers at least a part of the exhaust holes is formed in the inner rotor.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the ventilation hole has a maximum length at least in a cross section of the ventilation hole in the extending direction of the fiber focusing portion. The air holes change in two steps in the length direction and are formed to be shorter on the side of the fiber focusing portion.

According to a fifth aspect of the present invention, in the fourth aspect of the invention, the ventilation hole has a circular cross section over its entire length. In the invention described in claim 6, in the invention described in any one of claims 1 to 5,
The outer rotor is covered with a casing connected to a negative pressure source via a pipe, and the negative pressure source is configured to be able to change the strength of the negative pressure.

[0015]

According to the invention described in claims 1 to 6, the spread fibers fed into the rotor from the fiber transport channel slide along the rotor wall surface and are 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 twisted by the rotation of the inner rotor that rotates at a speed slightly higher than that of the outer rotor, while being guided by the inner rotor and drawn out as a yarn.

Since a large number of air holes communicating with the outer surface of the outer rotor or the negative pressure portion are formed in the fiber collecting portion,
During the operation of the spinning machine, an airflow is generated from the side of the fiber converging portion through the ventilation holes, and the fiber bundles converged on the fiber converging portion are pressed by the fiber converging portion. Therefore, rotation of the fiber bundle upstream of the stripping point is suppressed, and a yarn having a good appearance and a good texture when made into a cloth is spun.

When the fibers sliding on the inner wall surface of the outer rotor toward the fiber converging portion reach the fiber converging portion, the fibers are pressed and restrained by the fiber converging portion by the air flow. Therefore, even if some twist is transmitted to the fiber bundle upstream from the stripping point, there are no fibers loosely wrapped around the fiber bundle.

Further, in the invention described in claim 2, an air flow is generated in the air hole formed in the fiber collecting portion from the fiber collecting portion side to the exhaust hole through the negative pressure portion, and the air bundle forms the fiber bundle. It is pressed by the fiber focusing section. The cover portion provided on the inner rotor moves while sequentially covering the ventilation holes near the opening for introducing the fiber bundle as the inner rotor rotates. As a result, the pressing action on the fiber bundle near the stripping point is weakened, and the pulling resistance of the fiber bundle F is weakened.

According to the third aspect of the present invention, in the ventilation hole formed in the fiber converging portion, an air flow is generated from the fiber converging portion side through the negative pressure portion toward the exhaust hole, and the air flow forms the fiber bundle. It is pressed by the fiber focusing section. By changing the ratio of the flange formed on the inner rotor covering the exhaust hole, the exhaust flow rate from the exhaust hole is changed, and the pressing force on the fiber bundle is also changed. By preparing a plurality of inner rotors having different flange diameters and changing the inner rotor according to the spinning conditions, the pressing force against the fiber bundle is adjusted to an appropriate value.

Further, in the inventions according to claims 4 and 5, the width of the cross section of the vent hole, that is, the maximum length of the cross section with respect to the extending direction of the fiber focusing portion is short on the fiber focusing portion side and long on the opposite side. Therefore, when dust such as leaf meal and seed meal sent into the outer rotor together with the fibers is discharged from the ventilation hole, it is difficult to be clogged due to the hole shape. Further, since the width on the fiber converging portion side is narrow, the fibers effective for forming the yarn are difficult to be discharged from the ventilation hole.

According to the invention of claim 6, claim 1
~ The same operation as the invention according to any one of claims 5 to 5 is performed. In addition, the pressure in the casing that covers the outer rotor changes the strength of the airflow that flows through the ventilation holes, and the pressing force that acts on the fiber bundle changes correspondingly. The pressure in the casing is changed by changing the negative pressure intensity of the negative pressure source.

[0022]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 2, 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 an outer 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. Between the two pairs of support discs 4, a drive belt 8 common to a plurality of weights is provided on the rotor shaft 7.
Are arranged in a direction orthogonal to the rotor shaft 7 while being in pressure contact with the support disk 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 rotatably coaxial with the rotor shaft 7 through the bearing 9. It is supported. 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. Similar to the drive belt 8, a drive belt 13 provided in common for a plurality of weights is pressed against the shaft 10 while traveling in a direction orthogonal to the shaft 10, and the drive belt 1
The shaft 10 is rotationally driven by the traveling of No. 3. 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 made of Japanese Patent Publication No. 53-32.
Similar to the one described in Japanese Patent No. 409, when the support disk 4 rotates with the rotation of the rotor shaft 7, it slightly inclines so that a thrust load toward the thrust bearing 12 side acts on the rotor shaft 7. It is fixed to the rotating shaft 2 in the state. 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 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. Boss 18
A navel 24 having one end of the yarn drawing passage 23 opened is disposed in the center of the. The yarn pipe 25 forming a part of the yarn drawing passage 23 is arranged so as to intersect with the center line of the navel 24.
The side end 25a is the twisting start point of the yarn (fiber bundle F). A casing 26 that covers the outer rotor 6 is disposed at a position facing the housing 17 so as to be in contact with the end surface of the housing 17 via an O-ring 27. The casing 26 is connected to a negative pressure source 29 via a pipe 28. The negative pressure source 29 is configured to be able to adjust the strength of the negative pressure acting on the casing 26 via the pipe 28.

The inner rotor 11 is formed such that a part of its peripheral surface is extended to the vicinity of the fiber converging portion 6a of the outer rotor 6, and the navel 24 is provided in the center portion on the side corresponding to the boss portion 18. A recess 30 to be fitted is formed. The inner rotor 11 is formed so that the radius of the maximum outer diameter portion is larger than the radius of the inner surface of the outer rotor 6 at the opening end. An opening 31 for introducing a fiber bundle is formed near the fiber converging portion 6a of the outer rotor 6 in the maximum outer diameter portion of the inner rotor 11, and the opening 31 is provided on the plane where the fiber converging portion 6a exists. Therefore, the fiber converging portion 6a
From the vicinity to a position facing the yarn drawing passage 23, the fiber bundle F
Can guide you.

As shown in FIG. 3, a first guide 32 is arranged in the opening 31 at the tip of the inner rotor 11 toward the rotational direction side of the inner rotor 11, and the first guide 32 is substantially a semicircle. It has a columnar shape. That is, the first
The guide 32 can contact the fiber bundle F guided to the yarn drawing passage 23 from the rotation direction side of the inner rotor 11. At a position facing the circular arc surface of the first guide 32, the wall surface 3 extending along the circular arc surface of the first guide 32 is provided.
A wall 33 having 3a is formed. The tip of the wall 33 is located on the rotation direction side of the inner rotor 11 with respect to the arc surface of the first guide 32, and the tip of the wall 33 constitutes the second guide 34.

The inner rotor 11 is integrally formed of metal (for example, aluminum or aluminum alloy), and has excellent wear resistance due to surface treatment such as plating and ion plating on the surfaces of both guides 32 and 34 and the wall 33. Hard layers such as a chromium plating layer and a titanium nitride layer are formed.

The outer rotor 6 has a large number of ventilation holes 35 formed at predetermined positions at positions corresponding to the fiber converging portions 6a for communicating the fiber converging portions 6a with the outer surface of the outer rotor 6. The ventilation hole 35 is formed so as to extend in a direction orthogonal to the shaft 10.

Next, the operation of the above-configured apparatus 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. Unlike the rotation speed of the outer rotor 6, the inner rotor 11 rotates at the stripping speed of the fiber bundle F from the fiber collecting portion 6a (slightly higher than the rotation speed of the outer rotor 6). In this state, the fibers are opened by the action of the combing roller 21 and the fiber transport channel 2
The spread fiber fed into the outer rotor 6 from 2 slides along the inner wall surface of the outer rotor 6 and is converged on the fiber converging portion 6a which is the maximum inner diameter portion. The fiber bundle F collected in the fiber collecting portion 6a is connected to the yarn Y drawn through the yarn pipe 25 by a drawing roller (not shown),
As the yarn Y is pulled out, it is peeled off from the fiber collecting portion 6a, and is twisted by the rotation of the inner rotor 11 and drawn out as the yarn Y. The twist applied to the yarn Y and the fiber bundle F starts from the end 25a of the yarn pipe 25 as the starting point, and the outer rotor 6
Is transmitted to the fiber collecting portion 6a.

Since the ventilation hole 35 is formed so as to communicate with the bottom of the fiber converging portion 6a formed in the maximum inner diameter portion of the outer rotor 6, the ventilation hole 35 is self-contained as the outer rotor 6 rotates at high speed. Due to the exhaust action, an air flow is generated from the fiber converging portion 6a side to the outside of the outer rotor 6.
Further, since the inside of the casing 26 is kept in a depressurized state, the air flow toward the outside of the outer rotor 6 is also generated in the vent hole 35 by the action thereof. Due to the action of this air flow, the fiber bundle F converged on the fiber converging portion 6a is
Pressed by a.

Therefore, the fiber bundle F is twisted while being strongly pressed by the fiber collecting portion 6a at the stripping point P, rotation of the fiber bundle F upstream from the stripping point P is suppressed, and the yarn appearance and the cloth are obtained. Sometimes fine-textured yarn is spun. When the fibers sliding on the inner wall surface of the outer rotor 6 toward the fiber converging portion 6a reach the fiber converging portion 6a, the fibers are pressed and restrained by the fiber converging portion 6a by the air flow. Therefore, even if some twist is transmitted to the fiber bundle F upstream from the stripping point P, unlike the conventional case, the fibers before becoming the fiber bundle will not be loosely wound around the fiber bundle F in a state without binding force. . As a result, it is possible to prevent the appearance of the yarn from being disturbed and the texture of the fabric from being deteriorated. Further, since the pressing action of pressing the fiber bundle F against the fiber collecting portion 6a is due to the action of the air flow, there is no component that is worn and damaged unlike the device configured to mechanically press using components such as rollers. .

Further, in this embodiment, the fiber bundle F is pulled out at a speed such that the stripping point P is on the rotation direction side of the inner rotor 11 with respect to the second guide 34. The fiber bundle F stripped off from the fiber collecting portion 6a is in contact with the second guide 34 and the first guide 32, and the yarn drawing passage 23
Be led to. That is, the fiber bundle F is the inner rotor 1
The first rotation direction side is pulled out in a state of being in contact with the circular arc surface of the first guide 32. Therefore, the angle formed by the pulling direction of the fiber bundle F in the vicinity of the stripping point (twisting point) P and the fiber bundle F focused on the fiber focusing portion 6a, that is, the twisting angle θ is an obtuse angle. Then, the fiber focusing portion 6a
The fiber bundle F, which is stripped off from the fiber and subjected to twisting, has a small path difference between the inner side and the outer side, and twists are applied to the fiber bundle F with a substantially uniform force over the whole in a state where the fibers are straightly stretched.
As a result, the pulled-out yarn is less likely to have irregularities on the outer peripheral portion, and the texture of the cloth is improved.

When both rotors 6 and 11 rotate at high speed, the centrifugal force acting on the fiber bundle F moving from the stripping point P toward the first guide 32 becomes stronger, and the fiber bundle F is moved toward the wall surface side of the outer rotor 6. The force that acts to press against is increased. However, the second guide 34 existing between the stripping point P and the first guide 32 is
Since the fiber bundle F is located on the outer side, the fiber bundle F is
Is prevented from moving to the wall surface side. Further, due to the rigidity of the fiber bundle F, the phenomenon that the fiber bundle F bends after passing through the second guide 34 and comes into contact with the wall surface of the outer rotor 6 does not occur. Therefore, both rotors 6 and 11 have 90,000
Even when rotating at a high speed of about rpm, unlike the conventional apparatus, the fiber bundle F stripped off from the fiber collecting portion 6a is always held in a state where the twisting angle θ is an obtuse angle.

Further, by adjusting the strength of the negative pressure of the negative pressure source 29, the exhaust flow rate from the ventilation hole 35 is adjusted and the force for pressing the fiber bundle F against the fiber focusing portion 6a is changed. Therefore, by adjusting the strength of the negative pressure according to the spinning conditions, it becomes possible to apply a more appropriate pressing force to the fiber bundle F.

(Second Embodiment) Next, a second embodiment will be described with reference to FIGS. In this embodiment, the outer rotor 6
The structure of the inner rotor 11 is different from that of the above embodiment, and the other structures are the same. As shown in FIGS. 4 and 5, the outer rotor 6 is provided with a negative pressure chamber 36 as an annular negative pressure portion outside the fiber bundle 6a, and the negative pressure chamber 36 and the outside of the outer rotor 6 are formed. For example, a large number of exhaust holes 37 are formed in the bottom portion so as to communicate with.

The outer rotor 6 has an exhaust hole 37 and a main body 6A fitted to the rotor shaft 7,
The fiber converging portion 6a is formed, and is composed of an annular component 6B fitted and fixed to the main body 6A by press fitting or the like. A large number of ventilation holes 35 are formed in the annular component 6B at the positions corresponding to the bottom of the fiber collecting portion 6a.

The inner rotor 11 is formed in a disk shape having an outer diameter larger than the diameter of the fiber converging portion 6a and is sized to cover the exhaust hole 37 formed in the bottom portion of the outer rotor 6. In the inner rotor 11, a cover portion 11a is provided in the vicinity of the opening 31 on the side opposite to the rotation direction of the inner rotor 11 so as to cover the ventilation hole 35 communicating with the fiber converging portion 6a from the negative pressure chamber 36 side. In this embodiment, the cover portion 11a is formed to have a length that simultaneously covers the three vent holes 35.

In this embodiment, during operation of the spinning machine, the air inside the outer rotor 6 is exhausted from the exhaust holes 37 based on the negative pressure inside the casing 26, and the negative pressure chamber 36 becomes negative pressure. Due to the negative pressure in the negative pressure chamber 36, an air flow passing through the ventilation hole 35 is generated from the fiber focusing portion 6a side, and the fiber bundle F focused on the fiber focusing portion 6a is pressed by the fiber focusing portion 6a. As a result, the same action and effect as those of the above-mentioned embodiment are exhibited.

Further, in this embodiment, since the ventilation hole 35 near the stripping point P is covered with the cover portion 11a, the force for pressing the fiber bundle F stripped off from the fiber collecting portion 6a toward the fiber collecting portion 6a side. Becomes weaker and the drawing resistance of the fiber bundle F becomes smaller. As a result, spinning is facilitated, which is particularly suitable for sweet twisting.

(Third Embodiment) Next, a third embodiment will be described with reference to FIGS. In this embodiment, the inner rotor 1
The shape of 1 is different from that of the second embodiment, and other configurations are the same as those of the second embodiment. The inner rotor 11 is provided with a flange 38 that covers a part of the exhaust hole on the side corresponding to the bottom of the outer rotor 6. The flange 38 is formed so that the gap between the fiber converging portion 6a and the end surface of the annular portion where the hole 35 is formed is small. Therefore, the airflow mainly enters from the ventilation hole 35 into the negative pressure chamber 36 of the outer rotor 6 corresponding to the flow rate of the exhaust gas from the exhaust hole 37. The flow rate of the exhaust gas from the exhaust holes 37 is changed by changing the ratio of the flange 38 covering the exhaust holes 37. Therefore, by using the inner rotors 11 having different outer diameters of the flanges 38, the fiber bundles in the fiber bundle portion 6a can be changed. The pressing force on F can be changed. Therefore, if the inner rotors 11 having different outer diameters are prepared corresponding to the spinning conditions, the pressing force corresponding to the spinning conditions is secured even when the negative pressure source 29 is always operated at a constant pressure. be able to.

(Fourth Embodiment) Next, a fourth embodiment will be described with reference to FIGS. In this embodiment, the inner rotor 1
The shape of 1 and the shape of the vent hole 35 are different from those of the second embodiment, and the other configurations are the same. Inner rotor 1
In the shape of No. 1, the circumferential length of the maximum outer diameter portion is the length of the cover portion 11a that covers the ventilation hole 35, and is symmetrical with respect to a straight line passing through the center of the cover portion 11a and the rotation center of the inner rotor 11. In addition, the center of gravity of the inner rotor 11 is formed as the center of rotation. The cover portion 11 a is arranged on the rear side of the opening 31 in the rotation direction of the inner rotor 11.

The ventilation hole 35 has a circular cross-sectional shape over its entire length, and its diameter is the smallest on the fiber converging portion 6a side and gradually increases toward the opposite side, that is, the cross-sectional area is opposite from the fiber converging portion 6a side. It is formed so as to gradually increase toward the side. The size of the minimum diameter portion of the ventilation hole 35 allows passage of dust such as short fibers, leaf meal, and actual meal, which are unsuitable for the fibers forming the yarn, and the passage of fibers effective for forming the yarn. It is set to a size that suppresses.
The diameter of the minimum diameter portion of the vent hole 35 is about 1 mm or less, preferably about 0.5 mm, although it depends on the operating conditions. If it is larger than 1 mm, the effective fiber discharge increases, which is not preferable. Further, if the diameter is too small, dust is not discharged and clogging easily occurs.

Therefore, in this embodiment, in addition to exhibiting the same operation and effect as in the second embodiment, short fibers, leaf curls, which are fed into the outer rotor together with the fibers and which are unsuitable as fibers constituting the yarn, When dust such as fruit meal is discharged from the ventilation hole 35, it is difficult to be clogged. If the diameter of the vent hole 35 is constant, if the size of the dust entering the vent hole 35 is close to the size of the vent hole, the dust may be clogged in the middle of the vent hole 35. However, in this embodiment, since the size of the vent hole 35 gradually increases from the inlet side, that is, from the fiber converging portion 6a side toward the outlet side, the dust that has entered the vent hole 35 smoothly moves to the outlet side and is clogged. Never.

(Fifth Embodiment) Next, a fifth embodiment will be described with reference to FIGS. In this embodiment, the shape of the vent holes 35 is different from that of the third embodiment, and the other structures are the same. As shown in FIG. 10 (b), the vent hole 35 is composed of a small diameter portion 35 a and an enlarged diameter portion 35 b following the small diameter portion 35 a.
5a is provided on the fiber converging portion 6a side. Small diameter part 35
The diameter of a is set to the same size as the minimum diameter portion of the ventilation hole 35 of the fourth embodiment.

Therefore, in this embodiment, in addition to exhibiting the same effects as the third embodiment, it is unsuitable as a leaf meal, a fruit meal or a fiber constituting a yarn fed into the outer rotor together with the fiber. When dust such as short fibers is discharged from the ventilation hole 35, it is difficult to be clogged.

The present invention is not limited to the above embodiments, but may be embodied as follows. (1) The strength of forced exhaust, that is, the relationship between the strength of the negative pressure source 29 and the pressing force acting on the fiber bundle F of the fiber focusing portion 6a is obtained by performing test spinning in advance, and corresponds to the spinning conditions. Then, the strength of forced exhaust may be set.

(2) As in the device disclosed in Japanese Patent Laid-Open No. 64034/51, a drawing hole (drawing hole) is formed near the fiber collecting portion 6a of the inner rotor 11, and the fiber bundle F is drafted. However, it may be applied to a spinning device.

(3) The number, size and spacing of the vent holes 35 may be changed as appropriate. Also, the number, size, and spacing of the exhaust holes 37 may be changed as appropriate. When the strength of the negative pressure source 29 is fixed, the strength of the negative pressure in the negative pressure chamber 36 can be adjusted by changing the number and size of the exhaust holes 37.

(4) The entire inner rotor 11 is formed of ceramics such as alumina, aluminum nitride (AlN), silicon carbide, boron nitride, etc., which have excellent wear resistance, and
Only the guide 32 and the second guide 34 may be made of ceramic. In this case, the first guide 32 and the second
The wear of the guide 34 is suppressed, and the durability is improved.
When only the first guide 32 and the second guide 34 are made of ceramic, only the two guides 32 and 34 need to be replaced even if they are worn to the extent that they need replacement due to long-term use. You don't have to replace the whole thing.

(5) The wall 33 is provided on the downstream side of the second guide 34.
Alternatively, the second guide 34 may be provided so as to project in an isolated state without providing the above. Also in this case, the fiber bundle F stripped off from the stripping point P does not contact the inner wall surface of the outer rotor 6 again even if a centrifugal force is applied, and the twisting angle is kept obtuse and the first guide 32 is kept. Will be guided to.

(6) The cover portion 11a formed on the inner rotor 11 of the second embodiment is the same except for the portion on the upstream side in the rotation direction of the inner rotor 11 near the position facing the opening for introducing the fiber bundle. You may form so that the ventilation hole 35 of the part of may be covered. In this case, since the airflow mainly flows into the negative pressure chamber 36 side from the ventilation hole 35 near the stripping point P, even if the negative pressure source 29 has the same strength and the same rotation speed, the fiber bundles near the stripping point P are bundled. The pressing force on F becomes stronger.

(7) In the first embodiment, the shape of the inner rotor 11 may be a rotationally symmetrical shape in which the side opposite to the portion where the opening 31 is formed extends to the vicinity of the fiber converging portion 6a, or may be formed in a disc shape. That is, the shape of the inner rotor 11 may be any shape that can maintain the dynamic balance during rotation.

(8) As shown in FIGS. 12 (a), 12 (b) and 13, the vent hole 35 in the fourth embodiment is provided with the enlarged diameter portion 3
5b and a large-diameter portion 35c following it, the enlarged-diameter portion 3
5b is provided on the fiber converging portion 6a side. The diameter of the minimum diameter portion of the expanded diameter portion 35b is set to the same size as the minimum diameter portion of the ventilation hole 35 of the fourth embodiment. Also in this case, the dust can be smoothly discharged from the ventilation holes 35.

(9) As shown in FIGS. 14 (a), 14 (b) and 15, the vent hole 35 in the first embodiment is provided with the small diameter portion 3.
5a, the enlarged diameter portion 35b and the large diameter portion 35c, and the small diameter portion 35a is provided on the fiber converging portion 6a side. Also in this case, the dust can be smoothly discharged from the ventilation holes 35.

(10) The cross-sectional shape of the vent hole 35 may be a shape other than a circular shape, or may be composed of a circular cross-section portion and a portion having another shape. For example, FIGS. 16 (a) and 16 (b) and FIG.
As shown in FIG. 7, the ventilation hole 35 has an elongated groove 35d having a rectangular cross section that extends in a direction orthogonal to the fiber converging portion 6a, and a large diameter portion 35c having a width, that is, a length larger than the length of the fiber converging portion 6a in the extending direction. And the groove 35d is provided on the fiber collecting portion 6a side. Also in this case, the dust can be smoothly discharged from the ventilation holes 35. Note that FIG. 17 is a partially enlarged view of the outer rotor 6 in the vicinity of the fiber collecting portion 6a.

(11) In each of the above-described embodiments and modifications, the vent hole 35 may be formed so that the side opposite to the fiber converging portion 6a extends toward the side opposite to the rotation direction of the outer rotor 6, not in the radial direction. Good. In this case, vent 35
The flow rate of the airflow from the negative pressure chamber 36 to the negative pressure chamber 36 increases. Further, the vent hole 35 may be formed so as not to be in a plane orthogonal to the shaft 10 but to extend obliquely toward the opening side or the bottom side of the outer rotor 6.

(12) A fiber bundle introducing opening 31 for guiding the fiber bundle F collected in the fiber collecting portion 6a to the yarn drawing passage 23.
Is not limited to a continuous passage up to the yarn drawing passage 23, but may be any portion that guides the fiber bundle F near the fiber collecting portion 6a. For example, as shown in FIG. 18, the inner rotor 11 is provided with a first guide 32 and a second guide 34, and a space S opened from the first guide 32 to the yarn drawing passage 23.
It may be.

Inventions other than those described in the claims that can be grasped from the respective embodiments and modifications will be described below along with their effects. (1) In the invention described in any one of claims 1 to 6, a first guide for guiding the fiber bundle F while curving the fiber bundle F from the rotation direction side of the inner rotor is provided in the inner rotor near the opening, and A second guide is provided on the rotation direction side of the inner rotor. In this case, the fiber bundle stripped from the fiber bundle is always held in a state where the twisting angle is an obtuse angle, and the fiber bundle is pulled out without applying excessive pulling resistance to the fiber bundle.

[0060]

As described in detail above, the first to sixth aspects of the invention are described.
According to the invention described in, it is possible to increase the force for pressing the fiber bundle in the fiber bundle to the fiber bundle, suppress the transmission of twist to the fiber bundle upstream from the stripping point, and twist from the stripping point. It is possible to manufacture a yarn in which loose winding of the fiber around the fiber bundle is prevented even if the yarn is transmitted to the upstream side, and the appearance of the yarn and the texture of the fabric are improved.

According to the second aspect of the invention, the pull-out resistance of the fiber bundle is further weakened, and the fiber bundle can be pulled out easily. According to the third aspect of the invention, the pressing force against the fiber bundle can be adjusted by changing the ratio of the flange covering the exhaust hole.

According to the fourth and fifth aspects of the invention, the dust such as leaf meal and actual meal, which has been sent into the outer rotor together with the fibers, is smoothly discharged from the ventilation hole to the outside of the outer rotor. be able to.

According to the sixth aspect of the invention, the pressing force against the fiber bundle can be adjusted by changing the strength of the negative pressure source.

[Brief description of drawings]

FIG. 1 is a partially enlarged sectional view of an outer rotor and an inner rotor of a first embodiment.

FIG. 2 is a partial sectional view of the open-end spinning frame.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a partially enlarged sectional view of a second embodiment.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is a partially enlarged sectional view of a third embodiment.

7 is a sectional view taken along line VII-VII of FIG.

FIG. 8 is a partially enlarged sectional view of a fourth embodiment.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10A is a partially enlarged sectional view of the fifth embodiment,
(B) is an enlarged view of the vent hole.

FIG. 11 is a partially enlarged sectional view of the same.

12A is a partially enlarged cross-sectional view of a modified example, and FIG. 12B is an enlarged view of a vent hole.

FIG. 13 is a partially enlarged sectional view of the same.

FIG. 14A is a partially enlarged cross-sectional view of another modification,
(B) is an enlarged view of the vent hole.

FIG. 15 is a partially enlarged sectional view of the same.

FIG. 16 (a) is a partially enlarged sectional view of another modification,
(B) is an enlarged view of the vent hole.

FIG. 17 is a partially enlarged view of the same.

FIG. 18 is a cross-sectional view of another modification.

19A is a partially enlarged cross-sectional view of a conventional example, and FIG. 19B is a partially cutaway plan view.

[Explanation of symbols]

6 ... Outer rotor, 6a ... Fiber collecting part, 11 ... Inner rotor, 23 ... Yarn drawing passage, 24 ... Navel, 25
... yarn pipe, 31 ... opening for introducing fiber bundle, 32 ... first guide, 33 ... wall, 33a ... wall surface, 34 ... second guide, 35 ... vent hole, 35a ... small diameter part, 35b ... expanded diameter part , 35c ... Large diameter part, 36 ... Negative pressure chamber as negative pressure part, 3
7 ... Exhaust hole, 38 ... Flange, F ... Fiber bundle, P ... Peeling point.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hisaki Hayashi 2-chome, Toyota-cho, Kariya city, Aichi prefecture Toyota Industries Corp.

Claims (6)

[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. And a rotor-type open-end spinning machine in which an inner rotor having an opening for introducing a fiber bundle facing the fiber focusing portion is provided, the fiber focusing portion is provided at a position corresponding to the fiber focusing portion of the outer rotor. A large number of vent holes that connect the outer part of the outer rotor or the negative pressure part to the outer surface of the outer rotor, and press the fiber bundle that has been focused on the fiber focusing part toward the fiber focusing part during operation of the spinning machine. End spinning machine. 2. The outer rotor is formed with an annular negative pressure portion outside the fiber converging portion, and an exhaust hole is formed so as to communicate the negative pressure portion with the outside of the outer rotor. Is formed so that the fiber converging portion and the negative pressure portion communicate with each other, and the inner rotor is provided with a cover portion that covers the ventilation hole from the negative pressure portion side near the opening for introducing the fiber bundle. The rotor-type open-end spinning machine described in. 3. The outer rotor is formed with an annular negative pressure portion outside the fiber converging portion, and a plurality of exhaust holes are formed so as to communicate the negative pressure portion with the outside of the outer rotor. The rotor type open-end spinning frame according to claim 1, wherein a flange is formed on the rotor to cover at least a part of the exhaust hole. 4. The vent hole is formed such that the maximum length in the cross section of the vent hole with respect to the extending direction of the fiber focusing portion changes in at least two steps in at least the length direction of the vent hole, and is shorter toward the fiber focusing portion side. The rotor type open-end spinning machine according to any one of claims 1 to 3. 5. The rotor type open-end spinning machine according to claim 4, wherein the ventilation hole has a circular cross-sectional shape over its entire length. 6. The casing according to claim 1, wherein the outer rotor is covered with a casing connected to a negative pressure source via a pipe, and the negative pressure source is capable of changing the negative pressure intensity. The rotor-type open-end spinning machine according to any one of items.