JP2949962B2 - 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 opened by a combing roller to separate impurities, and the separated fibers are separated based on a negative pressure in a rotor rotating at a high speed. It is transported into the rotor by the airflow generated in the transport channel. The fibers transported into the rotor are bundled in a fiber bundle (fiber bundle groove), which is the maximum inner diameter of the rotor, and are added by the action of a drawing roller from a guide hole (thread drawing passage) provided at the center of the navel. It is pulled out while being twisted and wound up as a package on a bobbin. That is, in the rotor-type open-end spinning machine, when the fiber bundle bundled in the fiber bundle is stripped from the fiber bundle and pulled out along the wall surface of the guide hole formed in the center of the navel, The fiber bundle is twisted by being drawn out while rotating along the inner wall surface of the guide hole with 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 yarn while being attached to the fiber bundle, and the fiber bundle in the fiber bundle rotates by itself. For this reason, sufficient tension is not obtained at the time of twisting, and twist is applied in a state where the fiber is not sufficiently stretched, so that the fiber is not twisted straight and the yarn strength does not increase.

[0004] As an apparatus for solving the drawbacks of the conventional open-ended yarn, a rotor (outer rotor) having a fiber bundle is provided with a draw-out hole for drawing out a fiber bundle bundled in the fiber bundle, and the rotor is provided with the same. There has been proposed an apparatus provided with an inner rotor that performs differential rotation with respect to (for example, JP-A-51-64034, JP-A-57-56528, and the like).

[0005] In the open-end spinning machine, a part of impurities such as dust contained in the sliver is transported together with the opened fibers into the rotor, and adheres and accumulates on the fiber converging section by centrifugal force. In order to carry out spinning and yarn quality in a stable state, it is necessary to remove impurities before a large amount of impurities adheres and accumulates at the fiber bundle.

Conventionally, an apparatus for cleaning a rotor (spinning chamber) without disassembling the spinning apparatus is disclosed in Japanese Patent Publication No. 52-4656. This device, as shown in FIG.
A cover 53 is provided so as to cover an opening of a housing 51 and a rotor (spinning chamber) 52 rotatably supported by the housing 51, and a passage 55 into which a scraping piece 54 is inserted into the cover 53 is formed of fibers of the rotor 52. It is formed so as to be directed to the focusing groove 52a. Usually scraping pieces during spinning 5
4 is retracted into the passage 55, and after the rotation speed of the rotor 52 becomes low, the scraping piece 54 is disposed at the operation position where the tip is pressed by the fiber collecting groove 52a. Then, the dust scraped off from the fiber collecting groove 52 a by the scraping pieces 54 is discharged to the outside of the rotor 52 by the airflow A from the discharge passage 57 formed on the side opposite to the thread pull-out tube 56. .

[0007]

However, since the cleaning of the fiber focusing groove 52a cannot be performed during the spinning by the above-described cleaning device, the spinning must be stopped to clean the fiber focusing groove 52a. Therefore, there is a problem that the productivity of the machine stand is reduced correspondingly. Further, since the discharge passage 57 is provided at the rotation center of the rotor 52 and the diameter of the rotor 52 is reduced from the fiber bundle 52a toward the discharge passage 57, the rotation speed of the rotor 52 is considerably reduced. Otherwise, the removed impurities cannot be sucked and removed from the discharge passage 57. Further, there is also a problem that impurities attached to the wall surface between the fiber bundle 52a and the discharge passage 57 return to the fiber bundle 52a again by centrifugal force when the rotation speed of the rotor 52 increases to the normal operation speed. is there. or,
In order to suppress a decrease in productivity due to the stoppage of the operation of the machine base for cleaning, cleaning is performed in a state where impurities are accumulated to some extent in the fiber focusing groove 52a. Therefore, there is also a problem that the removal operation is performed after a considerable time has passed since the impurities adhered to the fiber focusing groove 52a, and it is difficult to remove the impurities adhered to the bottom.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a rotor-type open-end spinning machine capable of removing impurities deposited on a fiber bundle during spinning. It is in.

[0009]

In order to achieve the above object, according to the present invention, a positively driven fiber is driven a little faster than a rotor in a rotor having a fiber bundle where fibers supplied in an opened state are bundled. In addition, at least a part thereof is provided on the same axis as the rotor with a rotating body having a shape corresponding to the vicinity of the fiber bunching part of the rotor and partly corresponding to the end of the yarn drawing path, and the rotating body is provided with While forming a yarn path that guides the fiber bundle to a position facing the yarn drawing path, a scraping member that removes impurities attached to the fiber bundle section has a distal end having a slight gap with the fiber bundle section. It was provided so as to be located on the rear side in the rotation direction of the rotating body from the yarn path on the rotating body.

[0010]

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. The fiber bundle is stripped off from the fiber collecting portion, guided to a yarn path formed in a rotating body, and drawn out as a yarn while being twisted by the rotation of the rotating body that rotates slightly faster than the rotor. When the rotating body rotates, the scraping member moves along the fiber bundle with a slight gap from the fiber bundle, and the impurities deposited on the fiber bundle are scraped. Since the scraping member is located behind the yarn path on the rotating body in the rotation direction of the rotating body, even during spinning, the scraping member is immediately after the fiber bundle collected in the fiber collecting portion is peeled off. To move. Therefore, there is no possibility that the scraping member peels off the fiber bundle collected in the fiber collecting section, and there is no problem in spinning.

[0011]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, two coils 2 and 3 are arranged in front and rear (left and right in FIG. 1) in a casing 1 fixed to a machine frame (not shown).
On the front side of the casing 1, a hollow rotor shaft 5 having a rotor 4 fitted and fixed to the tip is rotatably supported by a bearing 6 in a state where it is inserted substantially to the center of the casing 1. A portion is formed on the peripheral wall of the rotor 4 such that the diameter increases toward the bottom surface side from the fiber bundle portion 4a.
A large number of discharge holes 4b are formed in the wall. A bearing 7 is fixed in a large diameter portion 5a formed at the front end of the rotor shaft 5, and a shaft 8 that penetrates the rotor shaft 5 is connected to the bearing 7 and a bearing 9 fixed to a rear end of the casing 1. It is rotatably supported coaxially with the rotor shaft 5. A rotating body 10 is fitted and fixed to the tip of the shaft 8 so as to be integrally rotatable.

A rotor 11 is mounted on the rotor shaft 5 at a position corresponding to the coil 2, and a rotor 12 is mounted on the shaft 8 at a position corresponding to the coil 3 so as to be integrally rotatable. That is, the motor M1 is constituted by the casing 1, the coil 2, the rotor shaft 5 and the rotor 11, and the motor M2 is constituted by the casing 1, the coil 3, the shaft 8 and the rotor 12, respectively.
Are directly fixed to the drive shaft of the motor. A voltage of a predetermined frequency corresponding to a target rotation speed is supplied to the coils 2 and 3 via an inverter (not shown), so that the rotor shaft 5 and the shaft 8 are driven at a variable speed.

A boss 14 is formed in the housing 13 disposed at a position facing the open side of the rotor 4 so as to protrude into the rotor 4. One end of a fiber transport channel 15 is formed on the boss 14. It is open. The fiber transport channel 15 is supplied by the action of the feed roller 16 and the presser 17 and guides the fiber opened by the combing roller 18 into the rotor 4. A rotor housing 19 that covers the rotor 4 is disposed at a position facing the housing 13 so as to be in contact with an end surface of the housing 13 via an O-ring 20. The rotor housing 19 is connected to a negative pressure source (not shown). ) Is connected via a pipe 21.

At the center of the boss 14, there is provided a navel 23 having one end of a thread draw-out passage 22 opened. An ejector 25 as a negative pressure generator is disposed in the middle of a yarn pipe 24 that constitutes a downstream portion of the yarn drawing passage 22. The yarn pipe 24 is disposed so as to intersect the center line of the navel 23, and the yam pipe 2
The third end is the starting point for twisting the yarn. Ejector 2
Reference numeral 5 denotes a passage 26 provided at the center, a plurality of injection holes 27 provided outside the passage 26 to inject compressed air toward an outlet side (a line drawing side) of the passage 26, and an outside of the injection hole 27. And an annular chamber 30 having an opening connected to each of the injection holes 27 and the holes 28 and connected to the compressed air supply pipe 29. Compressed air supply pipe 2
Reference numeral 9 is connected to a compressed air source (not shown), and a pressure adjusting device and a valve (both not shown) are provided in the middle of the source. The ejector 25 generates a negative pressure on the inlet side of the passage 26 by injecting a predetermined pressure of compressed air supplied from a compressed air source via a compressed air supply pipe 29 from an injection hole 27. ing.

The rotating body 10 is formed so that a part of its peripheral surface is extended to the vicinity of the fiber bundle 4a of the rotor 4, and a navel 23 is provided at a central portion on the side corresponding to the boss 14. A recess 31 to be loosely fitted is formed. One end of the rotor 10 has a maximum outer diameter portion,
The other end is in the vicinity of the fiber collecting portion 4a,
The thread paths 32 are respectively formed at positions facing each other, that is, at the bottom of the concave portion 31 so as to extend in the radial direction from the center of the rotating body 10. Further, in order to improve the sealing property between the rotating body 10 and the boss portion 14, a plurality of concentric concave and convex portions which are loosely fitted to each other are formed on the opposing surfaces of the rotating body 10 and the boss portion 14, thereby forming a labyrinth. A seal 33 is formed.

As shown in FIG. 3, the rotating body 10 has a yarn path 3
A notch 34 is formed on the rear side of the rotating body 10 in the rotation direction of the rotator 10, and a scraping member 35 for removing impurities attached to the fiber bundle 4a is fixed to a wall surface of the notch 34 by a screw 36. . The scraping member 35 is fixed with its tip having a slight gap from the fiber bundle 4a.

Next, the operation of the above-configured device will be described. During spinning operation, a voltage of a predetermined frequency is supplied to the coils 2 and 3, and the rotor 4 and the rotating body 10 are driven to rotate in the same direction as indicated by arrows in FIG. The rotating body 10 rotates at a speed different from the rotation speed of the rotor 4 at a speed at which the fiber bundle is stripped from the fiber bundle 4a (slightly higher than the rotation speed of the rotor 4). Compressed air is supplied to the ejector 25 from a compressed air source via a compressed air supply pipe 29, and the ejector 25
In the yarn drawing passage 22 on the further upstream side (the rotor 4 side), a suction action occurs in which the pressure becomes more negative than the negative pressure in the rotor 4. In this state, the spread fibers that have been spread by the action of the combing roller 18 and sent into the rotor 4 from the fiber transport channel 15 slide along the inner surface of the rotor 4 and are collected in the fiber collection section 4a. The fiber bundles bundled in the fiber bundling section 4a are supplied to the yarn path 32 generated based on the negative pressure in the yarn path 32.
The air is smoothly stripped off from the fiber bundle 4 a by the suction airflow toward, and guided into the yarn path 32.

The fiber bundle is connected to the yarn Y drawn out through the yarn pipe 24 by a drawing roller (not shown), and is drawn out as the yarn Y while being twisted by the rotation of the rotating body 10 as the yarn Y is drawn out. You. The twist applied to the yarn Y and the fiber bundle is transmitted from the one end 24a of the yarn pipe 24 to the upstream (toward the fiber bundle 4a). Fiber bundle is yarn path 3
The yarn path 32 receives tension when being introduced into the path 2, and is pressed against the end (corner) of the entrance of the yarn path 32. Thereby, the rotation of the fiber bundle is suppressed at the portion, and the rotation of the yarn Y and the fiber bundle that are pulled out while being twisted is prevented from propagating to the fiber bundle upstream of the position. Therefore, the fiber bundle is twisted in a state where the fiber is stretched by applying tension to the fiber at the time of twisting, and the fiber is twisted straight.

Since the scraping member 35 rotates together with the rotating body 10 and its tip moves in the vicinity thereof along the fiber collecting portion 4a, when impurities accumulate on the fiber collecting portion 4a, the scraping member 35 comes into contact with the impurities. And the impurities are scraped off. A part of the scraped impurities is discharged from the discharge hole 4b, and a part is discharged from the yarn path 32. While the impurities are being spun, the scraping member 35 always keeps the fiber bundle 4
Therefore, the amount of impurities removed at a time is small, so that the removal is performed smoothly, and even if the removed impurities are discharged from the yarn path 32, the spun yarn is not adversely affected. In addition, since the scraping member 35 is located near the rear side in the rotation direction of the rotating body 10 with respect to the yarn path 32, the scraping member 35 moves immediately after the fiber bundle is peeled off from the fiber bundle 4a. The fiber bundled in the section 4a is
It does not peel off from a and does not hinder spinning.

Since the supply of the compressed air to the ejector 25 is stopped at the time of splicing, the yarn Y is connected to the yarn pipe 2.
4 can be smoothly inserted into the rotor 4 through the yarn drawing path 22 and the yarn path 32.

(Embodiment 2) Next, a second embodiment will be described with reference to FIG. This embodiment is different from the previous embodiment in that the scraping member 35 is configured to be movable between an operation position for removing impurities and a retreat position separated from the fiber bunching portion 4a, and other configurations are the same. It is. Rotating body 1
0 has a chamber 37 and a passage 38 communicating with the chamber 37 and extending in parallel with the yarn path 32. A piston 39 to which the base end of the scraping member 35 is fixed is housed in the chamber 37. The chamber 37 accommodates a spring 40 for urging the piston 39 in a direction in which the tip of the scraping member 35 enters the passage 38. The rotating body 10 has a chamber 3
An air passage 41 for supplying a compressed gas (air) is formed on the back side of the piston 39 in the inside 7. An annular groove 42 communicating with the air passage 41 is formed on a surface of the rotating body 10 facing the housing 13, and compressed air supplied from an air supply passage (not shown) formed on the housing 13 side is formed by the groove. The air is supplied to the air passage 41 through the air passage 42.

In the case of this embodiment, when the compressed air is not supplied to the chamber 37, the scraping member 35 is disposed and held at a retracted position where the tip of the scraping member 35 is immersed in the passage 38 by the urging force of the spring 40. When compressed air is supplied from the air passage 41 into the chamber 37, the piston 39
, And the scraping member 35 is disposed at an operation position where the tip of the scraping member 35 is close to the fiber bundle 4a.
Then, the impurities are removed by the scraping member 35 with the rotation of the rotating body 10 in the same manner as in the above-described embodiment.
Removed from Therefore, in the configuration of this embodiment, the timing for disposing the scraping member 35 at the operation position can be freely set.

The speed of the open-end spinning machine has been increased, and the rotational speed of the rotor during steady spinning is 100,000 rpm.
When the scraping member 35 contacts the rotor 4 during such high-speed rotation, the scraping member 35 or the rotor 4 may be damaged. Therefore, in the case where the scraping member 35 is always fixed at the operating position as in the above embodiment, extremely high accuracy is required for mounting the scraping member 35. However, in the case of this embodiment, the timing of disposing the scraping member 35 at the operating position can be freely set, and by disposing the scraping member 35 at the operating position when the rotor 4 is not rotating at such a high speed, It becomes unnecessary to attach the scraping member 35 with extremely high accuracy.

(Embodiment 3) Next, a third embodiment will be described with reference to FIG.
It will be described according to. This embodiment is the same as the second embodiment in that the scraping member 35 is configured to be movable between the operating position and the retracted position, but the operating position and the retracted position are changed according to the rotation speed of the rotating body 10. The difference is that they are automatically moved and placed. That is, the rotating body 10 is
A passage 38 for accommodating the scraping member 35 having a length greater than the maximum radius of 0 is formed parallel to the yarn path 32, and an accommodation section 43 communicating with the path 38 is formed on the opposite side of the entrance of the yarn path 32. A weight 44 is movably accommodated in the accommodation portion 43 on an extension of the yarn path 32, and the base end of the scraping member 35 is attached to the weight 44.
It is fixed to. The weight 44 urges the scraping member 35 in a direction in which its tip protrudes from the passage 38 by a spring 46 interposed between a lid 45 provided in the storage portion 43 and the weight 44.

Therefore, in this embodiment, when the rotating speed of the rotating body 10 is low, the force of the spring 46 is larger than the centrifugal force acting on the weight 44, the tip of the scraping member 35 is held at the operating position, and With the rotation, impurities are removed from the fiber bundle 4a by the scraping member 35. When the rotation speed of the rotating body 10 becomes larger than a predetermined value, the centrifugal force acting on the weight 44 becomes larger than the force of the spring 46, and the scraping member 35 is moved to the retracted position.

The present invention is not limited to the above embodiments. For example, in the second embodiment, instead of using a compressed gas as a means for moving and arranging the scraping member 35 between the operating position and the retracted position. Alternatively, a magnetic force by an electromagnet may be used. Also, instead of providing the discharge hole 4b in the peripheral wall of the rotor 4, as shown in FIG. 5 (b), a housing space 47 for storing impurities removed from the fiber bundle 4a is provided on the bottom side of the fiber bundle 4a of the rotor 4. Alternatively, the impurities removed by the scraping member 35 during the spinning may be temporarily stored in the storage space 47, and the impurities accumulated in the storage space 47 may be discharged by the yarn splicer at the time of splicing. Further, instead of the ejector 25, another suction means may be connected to the yarn pipe 24 as a device for generating a negative pressure in the yarn path 32. Further, the negative pressure generator may be omitted. Further, instead of the rotor shaft 5 and the shaft 8 being individually driven for each of the weights, the rotor shaft 5 and the shaft 8 may be driven by a drive belt common to a plurality of weights pressed against the rotor shaft 5 and the shaft 8, respectively. Another configuration may be adopted, such as driving one of the shaft 8 and the shaft 8 with a drive belt common to a plurality of weights. In addition, a common drive source for the rotor 4 and the rotating body 10 is used, and a transmission mechanism is provided between the rotor shafts 5 and 8 so that the rotation speeds of both the rotation speeds have a predetermined ratio. When the spinning condition is changed, the gears and pulleys constituting the transmission mechanism may be replaced.

[0027]

As described above in detail, according to the present invention, it is possible to remove impurities accumulated in the fiber bundle without disturbing the spinning during the spinning, and to remove the impurities accumulated in the fiber bundle. It is possible to avoid a decrease in productivity due to stopping the spinning for removing impurities.

[Brief description of the drawings]

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

FIG. 2 is a partially enlarged sectional view.

FIG. 3 is a partial cross-sectional view showing a rotor and a rotating body as viewed from an opening side of the rotor.

FIG. 4 is a partially cutaway front view of a rotating body according to a second embodiment.

FIG. 5A is a front sectional view of a rotating body according to a third embodiment, and FIG. 5B is a partial sectional view of a rotor according to a modification.

FIG. 6 is a sectional view of a conventional device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 4 ... Rotor, 4a ... Fiber bundle part, 4b ... Discharge hole, 5 ... Rotor shaft, 8 ... Shaft, 10 ... Rotating body, 22 ... Thread take-out path, 23 ... Navel, 24 ... Yarn pipe, 3
2 ... thread path, 35 ... scraping member, Y ... thread.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yasuyuki Kawai 2-1-1 Toyota-cho, Kariya-shi, Aichi Pref. Inside Toyota Industries Corporation (56) References JP-A-57-56528 (JP, A) JP-A Sho 51-64034 (JP, A) JP-A-47-12017 (JP, A) JP-A-3-14635 (JP, A) JP-A-50-14829 (JP, A) JP-B-48-16454 (JP, A) B1) Japanese Patent Publication No. 52-4656 (JP, B1) Japanese Patent Publication No. 47-51652 (JP, B1) (58) Field surveyed (Int. Cl. ⁶ , DB name) D01H 4/22-4/26 D01H 4 / 08-4/14

Claims (1)

(57) [Claims] 1. A rotor having a fiber bundle where fibers supplied in an opened state are bundled is positively driven slightly faster than the rotor, and at least a part thereof is opposed to the vicinity of the fiber bundle of the rotor. A rotating body having a shape corresponding to the end of the yarn drawing passage is provided on the same axis as the rotor,
The rotating body is formed with a yarn path for guiding the fiber bundle from the vicinity of the fiber collecting section to a position facing the yarn drawing path, and a tip of the scraping member for removing impurities attached to the fiber collecting section is provided. A rotor-type open-end spinning machine provided so as to be located behind the yarn path on the rotating body in the rotation direction of the rotating body with a slight gap between the rotating body and the rotating body.