JPS6021921A - Apparatus for double-twist spinning - Google Patents

Abstract

PURPOSE:To obtain a spun yarn free from twist irregularity, by placing air false twisting nozzle at the turning part of the yarn of a double twister, a yarn-guiding hole to guide the yarn delivered from the false twisting nozzle to the center hole of the spindle, and a friction ring to contact with the ballooned yarn at the bobbin cover of the stationary system. CONSTITUTION:A fiber bundle drafted with the drafting device 1 is introduced through the ballooning guide 29 into a double twister. In the above process, the ballooning fiber bundle Y is guided along the friction rings 54, 55 attached to the exterior part of the bobbin cover 43, introduced into the air false twisting nozzle 9 of the turning part through the guide 10 rotating integrally with the spindle 2, and introduced into the center hole 35 of the spindle through the yarn- guiding bent hole 8. The yarn is taken out from the elongated part 52 of the spindle hole, passed through the stationary guide roller 33 and the traverse guide 28 moving reciprocately along the bobbin cover 43, and wound on a bobbin to obtain a package P.

Description

Detailed Description of the Invention Technical Field This invention is a double-twisted yarn that heats a fiber bundle sent out by a drafting device, turns the traveling direction of the fiber bundle, twists it twice as much as the rotation of the spindle, and winds it into a package inside a balloon. This invention relates to a type spinning device.

BACKGROUND ART Ring spinning is widely used as a method for producing spun yarn by aligning short fibers and heating them.

The ring spinning method has a wide range of repeat counts and can produce high-quality yarn, but it has problems in that productivity is low and the winding package is small, so it requires a large number of doffing operations and a wine mite. In order to wind ring-spun yarn into large packages with high productivity, it is necessary to increase the ring diameter and rotate the packages at high speeds. However, when the ring diameter is increased, the traveling speed of the traveler increases, and the traveler becomes hot due to frictional heat between the ring and the traveler.
Not only does the quality of the thread change and thread breakage increases, but the traveler itself deteriorates. Furthermore, when a large package is rotated at a high speed, air resistance becomes large, creating a new problem in that energy consumption increases dramatically.

In contrast, a double-twist spinning method has been proposed in which the fiber bundle sent out from a draft device is heated, turned around in its traveling direction, twisted twice as much as the rotation of the spindle, and then wound into a package inside a balloon. There is. In this double-twist spinning method, only half the actual twist of the number of twists to be heated is applied to the yarn between the yarn turning point and the draft device, and the 41#1 bundle is crimped. Due to poor slip resistance, the tensile strength is extremely low, and if left as is, it will not be able to withstand the tension applied to the yarn due to ballooning, causing yarn breakage and making spinning impossible. Therefore, when spinning yarn using the double twist spinning method, in order to give the yarn between the draft device and the yarn turn point a strength that can withstand ballooning, the yarn is twisted in the same direction as the actual twist at least near the yarn turn point. It is necessary to add false twist. Previously, the special public notice 1962-. Japanese Patent No. 19628 proposes a device in which a false twisting mechanism is provided in the vicinity of the yarn turning point, which is actively driven via a mechanical power transmission means and applies false twist to the yarn by mechanical action. However, when a false twisting element driven by a mechanical power transmission means is introduced into the balloon, the structure of the device becomes complicated, and the device becomes large and heavy.

As a result, it becomes difficult to increase the driving power and rotate the spindle for supporting the mechanism at high speed, resulting in disadvantages such as low productivity and increased costs. In addition, in general, in a double-twist type spinning device, a cylindrical bobbin cover is placed around a rotating package, and the yarn being spun advances while ballooning around the bobbin cover. If the yarn suddenly comes into contact with the bobbin cover, the frictional resistance against the yarn increases rapidly, or the yarn winds around the bobbin cover, causing the yarn to break.

Purpose This invention was made to solve the above-mentioned conventional problems, and its purpose is to impart false twist to yarn during the ballooning process, which is an essential element when putting a double twist type spinning device into practical use. A double-twisted yarn that allows the element to be made smaller and lighter with a simple mechanism, and that the yarn during the ballooning process does not come into contact with the bobbin cover or bobbin support and wind around them or cause yarn breakage. The purpose of the present invention is to provide a type spinning device.

Structure of the Invention In order to achieve the above-mentioned object, in the present invention, a thread guiding hole is formed in the spindle to guide the thread traveling while being heated to the top of the spindle by turning the traveling direction of the thread. The yarn turning point is used in this sense as the point at which the yarn finishes ballooning and its traveling direction coincides with the rotational axis direction of the spindle. ) in the vicinity,
An air nozzle having at least a function of false twisting in the same direction as the actual twist applied to the yarn by rotation of the spindle is rotatably mounted on the upper part of the spindle so as to be rotatable relative to the spindle. and a bobbin support that is held stationary is provided, and a friction ring is attached to at least either the bobbin support or the bobbin cover provided on the bobbin support to constantly contact the yarn during the ballooning process. Ta.

EXAMPLES Hereinafter, examples embodying the present invention will be described with reference to the drawings. Below the draft device 1 that thins the sliver and continuously supplies it, a spindle 2 is connected to a frame 3 and a support tube 4.
It is vertically and rotatably supported via a bearing 5 fixed to the holder 5, and is rotationally driven by a belt 7 via a boot 6 fitted and fixed to the lower end of the holder 5. As shown in FIG. 4, the spindle 2 has one end opened upward and the other end opened to the side of the spindle 2 in order to turn back the traveling direction of the thread Y and guide it above the spindle 2 while being heated. A thread guiding hole 8 is formed so as to Further, on the outer periphery of the spindle 2, a support 11 is fitted to the spindle 2 so that the air nozzles 9 and 10 for guiding the yarn Y to the yarn guiding hole 8 can be attached to the spindle 2 so as to be rotatable therewith. ing. As shown in FIG. 6.7.8, both air nozzles 9.10 have air injection holes 13 opened eccentrically and in the downstream direction with respect to the yarn passage 12. It has a function of false twisting in the same direction as the actual twist applied to Y, and a function of promoting the progress of yarn Y.

The second air nozzle 9 connected to the entrance of the yarn guide hole 8 and arranged horizontally has a constriction part 12 in the yarn passage 12.
A is provided.

An annular permanent magnet 14 whose outer peripheral surface is fitted onto the inner surface of the support tube 4 and an annular pole piece 15 closely attached to both upper and lower surfaces of the support tube 4 are attached to the lower outer periphery of the support body 11 .
The pole piece 15 is fitted so as to be rotatable relative to the pole piece 15, and is sealed by a magnetic fluid (not shown) attached to a protrusion formed on the inner peripheral surface of the pole piece 15. An annular groove 17 constituting an air chamber 16 is formed on the outer peripheral surface of the support body 11 corresponding to the inner surface of the permanent magnet 14 . The air chamber 16 and an external pressure air source (not shown) are connected through an air passage 18 formed between the permanent magnet 14 and the pole piece 15. The support body 11 has an annular air chamber 19, 20; 21 for guiding the compressed air in the air chamber 16 to the second air nozzle 9 and the first air nozzle 10.
and air passages 22, 23, 24 connecting each of the air chambers.
is formed. Further, the spindle 2 has the air chamber 1
In order to send the compressed air of No. 6 to an air chamber 26 provided in a bodon support 25, which will be described later, an annular air chamber 27 communicating with the air chamber 16 is formed, and the air chamber 27 and the air chamber A pair of air passage holes 28 communicating with the spindle 26 are formed parallel to the axis of the spindle 2. Further, as shown in FIG. 1, a spindle 2 is provided below the draft device 1.
A third air nozzle 29 is fixed coaxially with. Third
The air nozzle 29 has a function of imparting a false twist to the yarn Y in the same direction as the actual twist, and a function of promoting yarn entrainment.

As shown in FIG. 4, a bobbin support 25 is supported at the upper part of the spindle 2 through a bearing 30 so as to be rotatable relative to the spindle 2. Magnet 3 fixed to the inner wall of
1 and a magnet 33 fixed to the frame 3 via a bracket 32, even when the spindle 2 rotates, it is always held stationary without rotating accordingly. An iron plate 34 for magnetic flux convergence is attached to each of the magnets 31 and 33. A bobbin support 25 is connected to the thread guide hole 8 of the spindle 2.
A bobbin support 37 that supports a bobbin 36 for winding the spun yarn Y into a package P is rotatably attached to a pipe 35 provided at the center of the pipe 35 and coaxially with the spindle 2 via a bearing 38. Supported. The lower part of the bobbin support 37 is formed into a truncated conical shape, and turbine blades 39 are carved on the outer circumferential surface of the bobbin support 37 . It is designed to be rotated by compressed air. The air chamber 26 and the outer circumferential surface of the spindle 2 are interposed between a permanent magnet 41, a pair of pole pieces 42 forming a closed magnetic circuit, and a protrusion of the pole pieces 42 and the outer circumference of the spindle 2. sealed by a magnetic fluid (not shown).

A cylindrical bobbin cover 43 is formed on the upper surface of the bobbin support 25, and a guide rail 44 extending in the vertical direction is fixed to the inner surface of the bobbin cover 43. A movable body 48 including an A7-shaped guide 45, an iron plate 46, and a magnet 47 is supported on the guide rail 44 so as to be movable in the vertical direction along the guide rail 44. The movable body 48 moves up and down on the outside of a fixed cylindrical balloon protector 49 provided outside the bobbin cover 43 to protect the balloon of the thread Y, via a magnet 51 that moves up and down by the action of a cylinder 50. It is designed to be moved. Moreover, the guide rail 44
A roller 53 that guides the yarn Y emerging from the upper end of the guide tube 52, which rotates together with the bobbin support 37, to the yarn guide 45 is rotatably supported at the upper end.

As shown in FIG. 1.4, friction rings 54 and 55 are provided at the upper end of the outer periphery of the bobbin cover 43 and at the center of the outer periphery of the bobbin support 25 to constantly contact the yarn Y during the ballooning process.
is installed. The friction rings 54 and 55 are made of urethane rubber, which is a wear-resistant member, and are fitted and fixed onto the bobbin support 25 and the bobbin cover 43 using their elasticity so that their mounting positions can be changed. ing.

Next, the operation of the apparatus configured as described above will be explained. Now, when the machine is driven, the λ spindle is rotated at high speed via the belt 7 and pulley 6.

The fiber bundle that is thinned by the drafting device 1 and continuously sent out from the front roller 1a passes through the third air nozzle 29 and advances while ballooning along the balloon protector 49 while contacting the outer surface of the friction ring 5.4.55. and the first air nozzle 10. It is guided to the second air nozzle 9. The yarn Y that has exited the second air nozzle 9 is turned back in its traveling direction at the yarn guide hole 8 formed in the spindle 2, is guided above the package P through the pipe 35 and the guide tube 52, and passes through the rollers 53. The operation of the cylinder 50 leads to the yarn guide 45 which is reciprocated in the vertical direction via the magnet 51, and the bobbin support 3 is traversed by the yarn guide 45.
The package P is placed on the bobbin 36 which is rotated integrally with the package P.
It is rolled up as.

The yarn Y being spun by the rotation of the spindle 2 is given an actual twist of half the number of twists that is finally heated between the front roller 1a and the yarn turning point, and from the yarn turning point to the roller 53. (or the winding point), the same number of actual twists are added.

Therefore, with only the actual twist added by the rotation of spindle 2,
The yarn Y between the front roller 1a and the yarn turning point has very low tensile strength due to poor sliding resistance due to the pressure bond between the fibers, and cannot withstand the tension applied to the yarn Y due to ballooning, resulting in yarn breakage and spinning. It becomes impossible. However, in this device, the second air nozzle 9 and the first air nozzle 10, which have a false twisting function and a yarn advancement promotion function, are provided near the yarn turning point and at the bending part of the yarn Y, so that the yarn Y in the ballooning process is False twisting is applied in the same direction as the actual twisting by both air nozzles 9 and 10, and the convergence and yarn strength of the yarn Y are improved, and it can withstand severe ballooning and is less likely to break. Further, since the third air nozzle 29 also applies false twist to the yarn Y in the same direction as the actual twist, the twist is applied to the front roller 1.
The yarn is sufficiently propagated to a point, further improving the apparent strength of the yarn and reducing yarn breakage. Also, the thread Y is a friction ring 54.55
Since the thread Y advances while ballooning around the bobbin support 25 and bobbin cover 43 while constantly in contact with the bobbin support 25 and the bobbin cover 43, the thread Y comes into contact with the bobbin support 25 and the bobbin cover 43 and winds around them, causing thread breakage. There is no possibility that this will happen. Furthermore, since the yarn Y advances while always in contact with the friction ring 54.55, the frictional resistance against the yarn Y is always stable, which not only makes yarn breakage less likely to occur, but also allows ballooning while in contact with the friction ring 54.55. As a result, the yarn Y rotates on its own axis, and the yarn Y is given false twist in the same direction as the actual twist by the rotation of the spindle 2, increasing the strength of the yarn Y and preventing yarn breakage. Furthermore, since the friction ring 55 imparts false twist to the yarn Y, it is also possible to eliminate the first air nozzle 10.
There is no need for compressed air to be injected at zero, making it possible to reduce the manufacturing cost of spun yarn. In this case, in order to smoothly guide the thread Y after passing through the friction ring 55 to the second air nozzle 9, it is desirable that the upper part of the support body 11 be curved upward as shown in FIG. Furthermore, in the device of this embodiment, the friction rings 54 and 55 are fitted and fixed to the bobbin support 25 and the bobbin cover 43 by utilizing the elasticity of the friction rings 54 and 55, so that the ballooning shape of the thread Y is The fixed position can be easily changed to the most suitable position according to the situation.

Note that this invention is not limited to the above embodiments,
The friction rings 54 and 55 may be formed of a wear-resistant material such as plastic other than urethane rubber, ceramic or chrome-plated metal, or the friction rings 54 and 55 may be fitted and fixed in a predetermined position, or the third air nozzle may be It is also possible to arbitrarily change the shape and structure of each part without departing from the spirit of the present invention, such as by providing a simple yarn guide instead of 29.

Effects As detailed above, according to the present invention, the mechanism for imparting false twist in the same direction as the actual twist applied to the yarn during the ballooning process by rotation of the spindle is simple and compact, and the device is lightweight. At the same time, it prevents the yarn progressing while ballooning around the bobbin support and bobbin cover from contacting and wrapping around the bobbin support and bobbin cover, forming stable ballooning.
! The contact between the friction ring and the yarn gives the yarn a false twist in the same direction as the actual twist, which improves the apparent strength of the yarn during the ballooning process and reduces yarn breakage. be effective.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment embodying the present invention, FIG. 2 is an enlarged sectional view taken along line A-A in FIG. 1, and FIG. 3 is a B-B in FIG. 1. 4 is a sectional view taken along line C-C in FIG. 3, FIG. 5 is a sectional view taken along line D-D in FIG. 4, and FIG. 6 is an enlarged sectional view of the second air nozzle. , FIG. 7 is a sectional view taken along line E-E in FIG. 6, FIG. 8 is an enlarged sectional view of the first air nozzle, and FIG. 9 is a sectional view of a main part showing a modification. Draft device 1, front roller 1a, spindle 2,
Thread guide hole 8, second air nozzle 9, first air nozzle 10, bobbin support 25, bobbin support 37, bobbin cover 43
, yarn guide 45, balloon protector 49, friction rings 54, 55, yarn Y1 package P. Patent Applicant Toyota Industries Corporation Representative Patent Attorney On 1) Hironobu No. 6 5 Co. Figure 8 Figure 7N Figure 9

Claims (1)

[Claims] 1. In a double-twist spinning device that heats a fiber bundle sent out from a draft device, turns the traveling direction of the fiber bundle, applies twist twice as much as the spindle rotation, and winds it into a package inside a balloon. A thread guide hole is formed in the spindle to guide the thread traveling while being heated to the top of the spindle by turning the thread in its traveling direction, and the thread turned around in the thread guide hole completes ballooning and its traveling direction is changed. An air nozzle having a function of at least false twisting in the same direction as the actual twist applied to the yarn by rotation of the spindle is provided near a point corresponding to the rotational axis direction of the spindle so as to be rotatable together with the spindle. A bobbin support that is rotatably supported relative to the spindle and held stationary is disposed on the upper part, and at least either the bobbin support or the bobbin cover provided on the bobbin support A double twist type spinning device characterized by being equipped with a friction ring that constantly contacts the yarn during the ballooning process. 2. The double-twist spinning device according to claim 1, wherein the friction ring is made of a wear-resistant member such as urethane rubber or ceramic. 3. The friction ring is fitted and fixed to the bobbin support or the bobbin cover by utilizing its elasticity so that its mounting position can be changed. The double twist type spinning device according to item 2.