JP2970094B2 - 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 drawn out while rotating along the inner wall surface of the guide hole along with the rotation of the rotor due to friction with the wall surface, so that false twist is added to the fiber bundle and the twist propagation of the real twist is assisted.

[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.

In a rotor type open-end spinning machine, when a fiber bundle is torn off from a fiber bundle portion of a rotor, as shown in FIG. 11, a fiber f existing across a stripping point P becomes a fiber bundle F ( With the take-up of the yarn, the rotor 60
The fiber on the rear side in the traveling direction of the stripping point P is wound around the fiber bundle F in a coil shape. As a result, there is a problem that the bending rigidity of the yarn is increased, the feel when the cloth is made hard, and the appearance of the yarn is poor.

Japanese Patent Application Laid-Open No. 57-56528 discloses an apparatus for solving the drawbacks of the conventional open-end yarn. A fiber bundle bundled in the fiber bundle section is provided inside a rotor (outer rotor) having a fiber bundle section. An inner rotor having a spinning chamber having a fiber suction tube for sucking is provided so as to perform differential rotation with respect to the rotor, and compressed air is supplied to the spinning chamber of the inner rotor to generate an air vortex, thereby producing a fiber. The fiber bundle condensed in the converging section is suctioned by a fiber suction tube and sucked into a spinning chamber, and the fiber bundle is twisted by the action of the air vortex to form a yarn. A device has been proposed which discharges and withdraws with a withdrawal means.

[0006]

However, in the above-described apparatus, false twist is actively added to the fiber bundle by the action of the air vortex, but means for preventing the twist from propagating to the fiber bundle in the fiber collecting portion. Is not provided, and the twist is added in a state where the fiber is not sufficiently stretched, so that the conventional problem that the fiber is not twisted straight and the yarn strength is not increased has not been solved yet. In addition, there is a problem that the number of wound fibers wound in a coil shape by false twisting increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to twist fibers into a yarn in a state where fibers constituting a fiber bundle to be drawn while being twisted are stretched relatively straight. Another object of the present invention is to provide a rotor-type open-end spinning machine capable of producing a yarn having high tensile strength and capable of producing a yarn having a good feeling when formed into a cloth by eliminating fibers wound in a coil around the yarn.

[0008]

In order to achieve the above object, according to the present invention, there is provided a rotor having a fiber converging portion for converging fibers supplied in an open state, and is independently driven independently of the rotor. The rotor is provided on the same axis as the rotor with a shape in which at least a part of the rotor extends to near the fiber bundle of the rotor, and the rotor is being drawn out of the fiber bundle near the fiber bundle of the rotor. A fiber winding prevention unit is provided at a position corresponding to the opposite side of the direction of movement of the fiber bundle stripping point, and a twist propagation prevention unit is provided at a position closer to the fiber bundling unit of the rotating body and downstream of the fiber winding prevention unit. .

[0009]

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 peeled off from the fiber bundle and pulled out as a yarn while being twisted by the rotation of a rotating body that rotates at substantially the same speed as the rotor. When a twist is added to the fiber bundle stripped from the fiber bundle, the twist added to the fiber bundle is upstream of the fiber bundle by the action of the twist propagation preventing portion provided near the fiber bundle of the rotating body (fiber bundle). Propagation to the fiber bundle on the side (part side) is suppressed. Then, the fiber bundle is twisted in a state where tension is applied to the fiber at the time of twisting and the fiber is stretched. Also, due to the action of the fiber winding prevention section provided on the upstream side of the twist propagation prevention section, the fibers present across the fiber bundle stripping point of the fiber collection section are pulled out from the fiber collection section and twisted. This prevents the wound fiber bundle from being wound in a coil shape from the back (rear side in the moving direction of the stripping point).

[0010]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a pair of rotating shafts 2 (only one is shown) are supported in parallel with each other via bearings 3 on a base 1 fixed to a machine frame (not shown). At both ends of the rotating shaft 2, support disks 4 are fitted so as to be integrally rotatable, respectively, and a pair of adjacent support disks 4 form a wedge-shaped recess 5 (shown in FIG. 3).
Inside the wedge-shaped recess 5, a hollow rotor shaft 7 having a rotor 6 fitted and fixed at the tip is supported with its outer peripheral surface in contact with each support disk 4. A drive belt 8 common to a plurality of weights is disposed between the two pairs of support disks 4 in a direction orthogonal to the rotor shaft 7 in a state where the rotor shaft 7 is pressed against the support disks 4 and driven by a drive motor (not shown). The rotor shaft 7 is driven to rotate by the driving belt 8 traveling.

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 via the bearing 9. It is supported by. The shaft 10 has a rotating body 11 fitted and fixed to the distal end so as to be integrally rotatable, and a base end in contact with a thrust bearing 12. A drive belt 13 provided in common with a plurality of weights, like the drive belt 8, is pressed against the shaft 10 while running in a direction perpendicular to the shaft 10, and the shaft 10 is driven to rotate by the travel of the drive belt 13. Has become. The thrust bearing 12 includes a case 14 in which lubricating oil O is stored, a ball 16 supported by a felt oil supply member 15, and an adjusting screw 15a that abuts the ball 16 from the opposite side of the shaft 10. When the support disk 4 is rotated along with the rotation of the rotor shaft 7, the support disk 4 is, as described in Japanese Patent Publication No. 53-32409, thrust bearing 12 with respect to the rotor shaft 7. It is fixed to the rotating shaft 2 in a slightly inclined state so that a thrust load toward the side acts. Then, a thrust load acting on the rotor shaft 7 is transmitted to the shaft 10 via the bearing 9, and is supported by the thrust bearing 12.

A boss 18 is formed in a housing 17 disposed at a position facing the open side of the rotor 6 so as to protrude into the rotor 6. The boss 18 has a feed roller 19 and a presser 20. One end of a fiber transport channel 22 that guides the fiber supplied by the action and opened by the combing roller 21 into the rotor 6 is opened. In the center of the boss portion 18 is a thread drawing passage 23.
A navel 24 having one end opened is provided. The yarn pipe 25 constituting a part of the yarn drawing passage 23 is disposed so as to intersect with the center line of the navel 24, and the end of the yam pipe 25 near the navel 24 is a yarn twist starting point. A casing 26 covering the rotor 6 is disposed at a position facing the housing 17 so as to be in contact with an end surface of the housing via an O-ring 27.
Reference numeral 6 is connected to a negative pressure source (not shown) via a pipe 28.

The rotating body 11 has a maximum outer diameter whose radius is larger than the radius of the inner surface of the open end of the rotor 6, and a part of the peripheral surface extends to the vicinity of the fiber bundle 6 a of the rotor 6. It is formed in a shape. A regulating pin 29 as a fiber winding prevention portion is protrudingly provided on the end of the rotating body 11 opposite to the housing 17. In addition, a support piece 30 is protruded in the vicinity of the control pin 29 and downstream of the control pin 29, and the support piece 30 is provided with three engaging pins 31 constituting a twist propagation preventing section from the fiber bundle section 6a. The fiber bundle F is supported so as to be engageable in a state substantially perpendicular to the fiber bundle F to be drawn. The engagement pins 31 are arranged in a staggered manner along the moving direction of the fiber bundle F as shown in FIG. 4A, and the fiber bundle F is introduced into the engagement position with the engagement pin 31 at the time of piecing. As shown in FIG. 4B, the tip is bent toward the side opposite to the side engaged with the fiber bundle F for ease of use.

Next, the operation of the above-configured device will be described. During the spinning operation, the drive belts 8 and 13 run in the same direction, and the rotor 6 and the rotating body 11 are driven to rotate in the same direction via the rotor shaft 7 and the shaft 10, respectively. The rotating body 11 is different from the rotating speed of the rotor 6,
The fiber bundle F rotates at a peeling speed (slightly higher than the rotation speed of the rotor 6) from the fiber bundle 6a. In this state, the spread fibers that have been spread by the action of the combing roller 21 and sent into the rotor 6 from the fiber transport channel 22 slide along the inner surface of the rotor 6 and are focused on the fiber bundle 6a that is the maximum inner diameter. Is done. The fiber bundle F collected by the fiber collecting portion 6a is connected to the yarn Y drawn out through the yarn pipe 25 by a drawing roller (not shown), and is stripped from the fiber collecting portion 6a with the drawing of the yarn Y. Rotating body 11
The yarn Y is drawn out while being twisted by the rotation of.

The twist applied to the yarn Y and the fiber bundle F propagates from the one end 25a of the yarn pipe 25 as a starting point to the upstream (toward the fiber bunching portion), and the false twist due to friction between the yarn Y and the guide hole wall surface of the navel 24. Assist in this twist propagation. Since the fiber bundle F moves in a direction orthogonal to the engagement pins 31 in a state where the fiber bundle F is pressed against the three engagement pins 31, the fiber bundle F is suppressed from rotating at the corresponding positions. Then, the rotation of the yarn Y and the fiber bundle F that are pulled out while being twisted is prevented from propagating to the fiber bundle F upstream of the position corresponding to the engagement pin 31, and the twisting is performed at the position corresponding to the engagement pin 31. Stop is made. Therefore, the fiber bundle F is subjected to twisting in a state where the fiber is stretched by twisting the fiber at the time of twisting, and the fiber is twisted straight, the yarn strength is increased, and a yarn with good tightness is obtained. Can be

Since the rotating body 11 rotates at the same speed as the moving speed of the stripping point P, the regulating pin 29 always moves along the fiber collecting portion 6a in a state close to the stripping point P. Therefore, when the fiber f present in the fiber bundle 6a while straddling the stripping point P is wound around the fiber bundle F peeled off from the fiber bundle 6a, the movement thereof is regulated by the regulation pin 29. Then, the portion on the front side in the moving direction of the stripping point P across the stripping point P is twisted in the same direction with other fibers regardless of the presence or absence of the regulating pin 29. Further, the portion on the rear side in the movement direction of the stripping point P across the stripping point P is pulled toward the center of the rotor 6 as the fiber bundle F is pulled out without the restriction pin 29, and the other portion around the fiber bundle is drawn. Wound in a coil shape in the direction opposite to the twisting direction of the fiber. However, due to the presence of the regulating pin 29, the fiber f is regulated by the regulating pin 29 as shown in FIG. 5, and merges with the other fiber near the stripping point P with the fiber bundle F being drawn out.
When passing through an engagement portion with an engagement pin 31 (shown only in FIG. 5A) as the twist propagation preventing portion, the yarn is drawn out as a yarn while being twisted with other fibers.

(Embodiment 2) Next, a second embodiment will be described with reference to FIGS. In this embodiment, the structure of the fiber winding preventing portion and the twist propagation preventing portion provided on the rotating body 11 and the structure in which the fiber bundle F and the yarn Y being drawn are exerted with the suction action in the drawing direction. The present embodiment is different from the above-described embodiment in that the other configuration is the same.

As shown in FIG. 6, an ejector 32 as a negative pressure generator is provided in the middle of the yarn pipe 25 constituting the downstream portion of the yarn drawing passage 23. The ejector 32 has a passage 33 provided at the center, a plurality of injection holes 34 provided outside the passage 33 and injecting compressed air toward an outlet side (a yarn drawing side) of the passage 33, and an injection hole 34.
And an annular chamber 37 provided with an opening connected to each of the injection holes 34 and the holes 35 and connected to the compressed air supply pipe 36. The compressed air supply pipe 36 is connected to a compressed air source (not shown), and a pressure adjusting device and a valve (neither is shown) on the way.
Is provided. The ejector 32 is configured such that compressed air of a predetermined pressure supplied from a compressed air source via a compressed air supply pipe 36 is injected from an injection hole 34,
A negative pressure is generated on the inlet side of the passage 33.

The rotary body 11 has a concave portion 38 into which the navel 24 is loosely fitted at a central portion on a side corresponding to the boss portion 18. In the maximum outer diameter portion of the rotating body 11, one end is located near the fiber collecting portion 6a of the rotor 6, and the other end is opposed to the yarn drawing passage 23, that is, a yarn path 39 having an opening at the bottom of the concave portion 38 is provided. 11 is formed to extend in the radial direction from the center. As shown in FIG. 7, the shape of the entrance side of the yarn path 39 is formed such that the radius of curvature R of one wall surface 39a on the rotation direction side of the rotating body 11 is 0.5 mm or more. And the other wall 3 on the opposite side
The radius of curvature R of 9b is smaller than 0.5 mm. The one wall surface 39a is pressed against the wall surface 39a by the force of drawing the fiber bundle F into the yarn path 39 based on the negative pressure in the yarn path 39 due to the action of the ejector 32. On the other hand, a twist propagation preventing portion for preventing the propagation of twist to the upstream side from the location is configured.
Further, the other wall surface 39b constitutes a fiber winding prevention portion. The other wall surface 39b is formed closer to the fiber bundle 6a than the one wall surface 39a so that the twist propagation preventing portion is located on the downstream side of the fiber winding preventing portion. The rotator 11 has a boss 18 and the rotator 11.
In order to improve the sealing performance between the boss portion 18 and the boss portion 18, the boss portion 18 is fixed to the shaft 10 so that the gap between the boss portion 18 and the end surface is as small as possible.

In this apparatus, the ejector 32 is operated during the spinning operation.
Is supplied from a compressed air source via a compressed air supply pipe 36 to the upstream side of the ejector 32 (the rotor 6 side).
In the yarn pull-out passage 23, a suction action is performed in which the pressure becomes more negative than the negative pressure in the rotor 6. Then, the fiber bundle 6a
The fiber bundle F bundled in the fiber bundle 39 is drawn by the suction airflow toward the yarn path 39 which is generated based on the negative pressure in the yarn path 39, and the fiber bundle F
a is smoothly removed from the thread a and guided into the yarn path 39. The fiber bundle F receives tension when introduced into the yarn path 39, and
9 is pressed against one wall surface 39a of the entrance. Thereby, the rotation of the fiber bundle F is suppressed at the corresponding location, and the rotation of the yarn and the fiber bundle that are pulled out while being twisted is prevented from propagating to the fiber bundle F upstream from the position corresponding to the wall surface 39a. That is, twisting is performed at a position corresponding to the wall surface 39a. Fiber bundle F and wall 3
Since the longer the contact length with 9a, the greater the twisting effect, the radius of curvature R is preferably 0.5 mm or more.

The portion of the fiber f present in the fiber bundle 6a in the state of straddling the stripping point P and sandwiching the stripping point P on the rear side in the moving direction of the stripping point P is regulated by the other wall surface 39b. In the vicinity of the stripping point P, the fiber bundle F being joined is joined with other untwisted fibers, and is drawn out as a yarn while being twisted with the other fibers. In order to improve the slip of the fiber f that moves in contact with the other wall surface 39b, the radius of curvature R is 0.5 m.
Although it is better to be smaller than m, even if it is 0.5 mm or more, there is a winding prevention function.

Further, as described above, the propagation of the twist upstream from the position corresponding to the wall surface 39a of the yarn path 39 is prevented.
The fiber bundle F just peeled off from the fiber bundle 6a has low strength. However, due to the action of the ejector 32, the yarn path 3
Since the suction airflow toward 9 is generated, stripping of the fiber bundle F and introduction of the fiber bundle F into the yarn path 39 are performed smoothly.

Since the supply of compressed air to the ejector 32 is stopped at the time of splicing, the reverse insertion of the yarn Y from the yarn pipe 25 into the rotor 6 through the yarn drawing passage 23 and the yarn path 39 is performed smoothly. Will be

(Embodiment 3) Next, a third embodiment will be described with reference to FIG. In this embodiment, the structure is the same as that of the second embodiment except for the structure of the fiber winding prevention portion provided on the rotating body 11. That is, the cutter 40 is fixed to the rotating body 11 on the opposite side of the wall surface 39a as the twist propagation preventing portion formed at the entrance end of the yarn path 39 as the fiber winding preventing portion. The cutting part of the cutter 40 is separated from the fiber bundle part 6 by the wall surface 39a.
a. In the apparatus of this embodiment, the yarn path 39 is peeled off from the fiber bundle 6a and twisted.
Twisting of the fiber bundle F moving inside is performed by the wall surface 39a in the same manner as in the second embodiment. Further, when the fiber existing in the fiber bundle 6a while straddling the stripping point moves toward the inside of the yarn path 39 together with the fiber bundle being drawn out, the fiber is cut by the cutter 40 near the stripping point, and the stripping point is set. The portion on the rear side in the moving direction of the stripping point is not wound around the fiber bundle being drawn out in a coil shape.

It should be noted that the present invention is not limited to the above embodiments, and for example, as shown in FIG.
Is formed as a separate member 41 made of a material having excellent abrasion resistance such as ceramics, and wall surfaces 39a and 39b similar to those of the above and the second embodiment are formed at the ends thereof to form fibers. A winding prevention part and a twist propagation prevention part may be used, or at least the inlet part of the yarn path 39 of the rotating pair 11 may be hardened by surface treatment. Further, as shown in FIG. 9 (b), the rotating pair 11 is formed in a point-symmetrical shape, and the yarn path 39 is not a hole but a groove which is open on the open side of the rotor 6, and opposing wall surfaces at both ends of the groove are formed. Similarly to the second embodiment, a twist propagation preventing portion and a fiber winding preventing portion may be provided.
Further, as shown in FIG. 10, a groove-shaped thread path 39 is formed in the rotating pair 11, and the rotating body 1 at the entrance of the thread path 39 is formed.
A brush (not shown) and a plurality of pins 42 are provided on the wall surface on the rotation direction side of 1 in a state orthogonal to the yarn path 39 to serve as a twist propagation preventing member, and a regulating pin 29 as a winding preventing portion is provided on the opposite side. You may.

[0026]

As described above in detail, according to the present invention, the fibers constituting the fiber bundle to be drawn while being twisted are twisted into the yarn while being stretched relatively straight, and the tensile strength of the yarn is reduced. growing. In addition, due to the action of the fiber winding preventing portion disposed upstream of the twist propagation preventing portion, there is no fiber wound around the spun yarn in the form of a coil, and the feeling of fabric is improved.

[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 relationship between a rotor, a rotating body, a support disk, and a rotor shaft as viewed from an opening side of the rotor.

FIG. 4A is a diagram of the twist propagation preventing portion viewed from a tip end side of an engaging pin, and FIG. 4B is a diagram of the twist propagation preventing portion viewed from a side surface of the engaging pin.

FIG. 5 is a schematic view showing the operation of a fiber winding prevention portion.

FIG. 6 is a sectional view taken along line VI-VI in FIG. 7;

FIG. 7 is a sectional view of a main part of a second embodiment.

FIG. 8 is a sectional view corresponding to FIG. 6, showing a third embodiment.

FIG. 9 is a sectional view of a modified example.

FIG. 10 is a partial sectional view showing another modification.

FIG. 11 is a schematic view showing an operation of generating a wrapped fiber in a conventional device.

[Explanation of symbols]

6 rotor, 6a fiber bundle, 11 rotating body, 23
Thread pull-out passage, 24 ... navel, 25 ... yarn pipe,
29: regulating pin as a fiber winding prevention section; 31: engagement pin constituting a twist propagation prevention section; 32: ejector; 39
... yarn path, 39a ... wall surface constituting twist propagation preventing portion, 39b
... wall surface constituting the fiber winding prevention portion, 40 ... cutter as the fiber winding prevention portion, 42 ... pin forming the twist propagation preventing portion, F ... fiber bundle, f ... fiber, P ... stripping point, Y ...
yarn.

──────────────────────────────────────────────────続 き Continued on 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) 2-6636 (JP, A) JP-A-51-64034 (JP, A) JP-A-5-33226 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) D01H 4/08 -4/14 D01H 4/40-4/44

Claims (1)

(57) [Claims] In a rotor having a fiber bundle where fibers supplied in an opened state are bundled, the rotor is positively driven independently of the rotor and at least a part of the fiber is bundled up to the vicinity of the fiber bundle of the rotor. A rotating body having an extended shape is provided on the same axis as the rotor, and the fiber is positioned at a position corresponding to the opposite side of the direction of movement of the stripping point of the fiber bundle being pulled out from the fiber bundle near the fiber bundle of the rotating body. A rotor-type open-end spinning machine having a winding prevention unit and a twist propagation prevention unit at a position near a fiber bundle of a rotating body and downstream of the fiber winding prevention unit.