JP2002363834A - Apparatus for manufacturing core yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automate an apparatus for manufacturing a Core yarn that a fiber comprising a fiber bundle is wrapped around an elastic yarn that is a core fiber. SOLUTION: In this apparatus for manufacturing the core yarn having a drafting unit 6 for drafting the fiber bundle 5, an elastic yarn supply device 10 for supplying the elastic yarn 11 (core fiber) to the fiber bundle 5, an air spinning device 13 for producing the core yarn by introducing the elastic yarn 11 and the fiber bundle 5 and activating an vortex air current on them, a yarn delivering device 14 disposed in the downstream side of the air spinning device 13, a winding unit 16 for winding the core yarn discharged from the yarn delivering device 14 and a yarn piecing device for piecing the core yarn in the spinning side and the yarn in the winding side, the apparatus is equipped with an extruding device 41 for introducing yarn discharged from the air spinning device 13 to the yarn piecing device by extruding it, a detecting device 66 for detecting the yarn presence in the extruding device 41 and a control unit 51 for controlling the supply of the elastic yarn by the elastic yarn supply device based on the result of the detecting device 66.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a covering spandex core yarn (hereinafter referred to as a "covering spandex core yarn") in which an elastic yarn, that is, spandex is used as a core fiber and a fiber constituting a fiber bundle is wound around the elastic yarn. The present invention relates to a technique for automating the operation of a manufacturing apparatus for manufacturing a core yarn.

[0002]

2. Description of the Related Art As a production apparatus for producing a core yarn using an elastic yarn as a core fiber, a so-called ring spinning machine has been conventionally known. The spinning speed of this ring spinning machine is
Generally, it is about 20 meters per minute. Therefore, as a technique for increasing the spinning speed, a pneumatic spinning technique capable of realizing high-speed spinning of about 10 times that of the ring spinning machine is known. In such a pneumatic spinning machine,
As a core yarn manufacturing apparatus for manufacturing a core yarn using an elastic yarn as a core fiber, the techniques of Japanese Patent No. 2734805 and Japanese Patent No. 2862107 are known.

[0003]

However, in a conventional apparatus for manufacturing a core yarn using an elastic yarn,
The device described in Japanese Patent No. 2734805 passes an elastic yarn through a pneumatic spinning nozzle by manual operation, and once the operation is stopped for some reason, the core yarn on the spinning side and the core yarn on the winding side are separated. The operation cannot be started again after automatic splicing. That is, when a slab occurs and the yarn is cut by the cutter, the operator must manually supply the elastic yarn every time.

[0004] In Japanese Patent No. 2862107,
There is a specific disclosure of a configuration in which the elastic yarn is automatically supplied from the upstream side of the front roller of the draft device. However, no other operation in piecing (operation other than the elastic yarn supply operation) is disclosed at all. In other words, the relationship between the sliver supply start timing and the elastic yarn supply start timing is not described at all in the publication. In this case, for example, at the time of piecing, if the elastic yarn is supplied while the sliver is not running normally, the elastic yarn may be clogged in the spinning nozzle. When such a situation occurs, automatic restart cannot be performed. In addition, when the yarn supply at the start of the spinning (the spun yarn is generated and discharged from the sliver) fails, the elastic yarn is supplied, and only the elastic yarn is introduced into the yarn joining device. However, there is also a problem that is wound into a package.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an apparatus for manufacturing a core yarn.
In the case where a slab is generated and the yarn is cut, etc., by automatically performing the reliable yarn feeding of the core yarn including the elastic yarn, without bothering the operator,
The object is to enable piecing and restarting operation.

[0006]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, in the first aspect, a draft device for drafting a fiber bundle, an elastic yarn supply device for supplying an elastic yarn as a core fiber to the fiber bundle, and an elastic yarn and a fiber bundle are introduced and swirled to them. An air spinning device for producing a core yarn by applying an air flow, a yarn feeder disposed downstream of the air spinning device, a winding device for winding the core yarn out of the yarn feeder, and spinning And a yarn splicing device for splicing the core yarn on the winding side and the core yarn on the winding side, wherein the yarn discharged from the pneumatic spinning device is drawn out and guided to the yarn splicing device. A detection device for detecting the presence of the yarn in the drawing device; and a control device for controlling the supply of the elastic yarn by the elastic yarn supply device based on the detection result of the detection device.

According to a second aspect of the present invention, a draft device for drafting a fiber bundle, an elastic yarn supply device for supplying an elastic yarn as a core fiber to the fiber bundle, and an elastic yarn and a fiber bundle are introduced and a swirling air flow is supplied to them. An air spinning device that produces a core yarn by acting on the air spinning device, a yarn feeding device disposed downstream of the air spinning device, a winding device that winds the core yarn output from the yarn feeding device, A yarn splicing device for splicing a core yarn and a core yarn on a take-up side, in a core yarn manufacturing device, a drawing device for drawing out the yarn discharged from the pneumatic spinning device and guiding the yarn to the yarn splicing device; A detecting device that detects that the yarn pulled out by the pulling-out device has been given a feeding force by the yarn feeding device;
A control device for controlling the supply of the elastic yarn by the elastic yarn supply device based on the detection result of the detection device.

According to a third aspect of the present invention, the drawing device is a movable suction pipe, and the detecting section detects the presence or absence of the spun yarn in a suction path of the suction pipe.

According to a fourth aspect of the present invention, the elastic yarn supply device includes an air sucker device and a clamp cutter device, and the control device activates the air sucker device when starting the supply of the elastic yarn. After a lapse of a predetermined time, the control is performed so that the gripping of the elastic yarn by the clamp cutter device is released.

According to a fifth aspect of the present invention, the elastic yarn supply device includes a feeding roller that rotates in contact with the elastic yarn supply winding body, and the control device includes:
The control is such that the feeding of the elastic yarn by the feeding roller is started almost simultaneously with the release of the holding of the elastic yarn by the clamp cutter.

According to a sixth aspect of the present invention, the pneumatic spinning device includes a hollow guide shaft, and a nozzle member for generating a swirling air flow at a tip end of the hollow guide shaft, and the air guide is provided in a yarn passage of the hollow guide shaft. While supplying the elastic yarn and the fiber bundle from the front end side, the swirling air flow by the nozzle acts to generate a core yarn.

[0013]

Next, an embodiment of the present invention will be described. First, the overall configuration of the core yarn manufacturing apparatus of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing a spinning device and a yarn splicing truck of the core yarn of the present invention, FIG. 2 is an enlarged side sectional view of a portion of the spinning device and the yarn splicing truck of FIG. 1, and FIG. FIG. 4 is an overhead view showing a spinning unit, a suction nozzle, and a main part of the present invention. FIG. 5 is an enlarged view of a core yarn of the present invention, and FIG. 6 is an enlarged view of a conventional core yarn. FIG. 7 is a perspective view showing how the covering fiber is wound in the core yarn of the present invention. FIG. 8 is a control block diagram of the core yarn spinning device of the present invention. FIG. 9 is a timing chart of the core yarn spinning device of the present invention. FIG. 10 shows a core yarn produced by a ring spinning machine, a core yarn produced by a conventional spinning method or apparatus using a covering fiber as a staple fiber, and a 100% cotton covering fiber produced by the production method of the present invention. FIG. 6 is a diagram showing a draw ratio-yarn strength characteristic of an elastic yarn 11 as a core fiber between a core yarn and a core yarn. FIG. 11 is a bird's-eye view showing the main part of the embodiment of the present invention in which the supply section of the core fiber is driven by a motor.

The core yarn manufacturing apparatus is configured by arranging a large number of spinning units 1 in a machine base longitudinal direction. A draft device 6 is provided above each unit 1. As shown in FIG. 2, the draft device 6 is supplied from the rear can 2 through the guide 3, drafts (draws) the sliver 4 serving as a covering in the core yarn, and aligns the sliver 4 into a predetermined fiber bundle 5. In this embodiment, the cotton 10
The sliver 4 composed of 0% short fibers (fibers) is used as a raw material, but is not limited thereto. As shown in FIG. 3, the draft device 6 mainly includes a back roller 7, a middle roller 8 wound around an apron, and a front roller 9. A pneumatic spinning device 13 is arranged downstream of the draft device 6 and close to the front roller 9. The clutch (reference numeral 75 shown in FIG. 8) for connecting and disconnecting power to the back roller 7 is
1 and the control device 51 controls the transmission / cutoff of power. Each spinning unit 1 includes an elastic yarn supply device 10 that supplies an elastic yarn 11 having high elasticity to the fiber bundle 5 (sliver 4) in the draft device 6. The air spinning device 13 applies a swirling airflow of compressed air from the air spinning nozzle 86 to the elastic yarn 11 supplied from the elastic yarn supplying device 10 and the fiber bundle 5 drafted by the draft device 6. Spinning,
This is for producing a core yarn 12 in which the elastic yarn 11 is used as a core fiber and the outside is covered with the fiber of the fiber bundle 5. The pneumatic spinning device 13 is provided with a yarn discharge suction flow generating nozzle 82 different from the pneumatic spinning nozzle 86 (described later). At the start of spinning out of the draft device 6, the fiber bundle 5 is After being automatically introduced into the yarn passage of the air spinning device 13 and spun by the air spinning device 13,
The spun yarn having a predetermined strength is configured to be discharged from a discharge port of the air spinning device 13.

At the time of covering the fiber bundle 5, the core yarn 12 manufactured by the core yarn manufacturing apparatus of the present invention is configured so as to be spirally wound around an elastic yarn 11 as shown in FIG. FIG. 5 (b)
As shown in (1), a binding portion K is further formed at a constant interval on the outer periphery of the single yarn, and the fiber bundle 5 and the elastic yarn 11 are wound. Downstream of the pneumatic spinning device 13, a yarn feed roller 14 as a yarn feeder that applies a feeding force to the manufactured core yarn 12 and feeds the yarn downstream.
Is provided. As shown in FIG. 2 to FIG. 4, the yarn feed roller 14 is configured by a pair of rollers of a lower constantly rotating delivery roller and an upper nip roller that contacts and rotates with the delivery roller. When the yarn is gripped between the rotating rollers, a feeding force is applied to the yarn. A core yarn 12 fed from a yarn feed roller 14 is packaged in a lower portion of the front surface of the unit 1.
A winding device 16 is provided for winding the sheet.

Further, as shown in FIG.
Between the core yarn 12 and the winding device 16
A slab catcher (thickness defect detector) 17 for detecting a yarn defect such as yarn unevenness is provided.
Is a cutter 63 provided downstream of the yarn feed roller 14.
(FIG. 4) to control the core yarn 12 to be cut. In the present invention, under the control of the control device 51, the drive of the back roller 7 constituting the draft device 6 is stopped by disconnecting the clutch (reference numeral 75 in FIG. 8) at the same time when the yarn is cut by the cutter 63, and the air spinning is performed. The device 13 is stopped to stop the core yarn spinning,
The driving of the elastic yarn package 20 described later is also stopped. In addition, the clamp cutter device 33 (FIG. 4) constituting the elastic yarn supply device 10 holds the end of the elastic yarn 11 by cutting the electromagnetic control valve 56, and cuts the end of the elastic yarn 11. Stopped at Clamp cutter device 3
The actuator 3 is operated by an actuator 54, and an electromagnetic control valve 56 for controlling high-pressure air supplied to the actuator 54 is provided. The electromagnetic control valve 56 also controls the controller 51.
It is opened and closed by a signal from The control block diagram of the spinning device of the present invention including the control device 51 is as shown in FIG.

Above the draft device 6, a supply device 10 for an elastic yarn 11 is provided, and the elastic yarn 11 supplied from the elastic yarn supply device 10 is fed to a fiber bundle from between the front roller 9 and the middle roller 8. 5, passes through the front roller 9 together with the fiber bundle 5, and is introduced into the air spinning device 13. This elastic yarn supply device 10
As shown in FIG. 1, a common drive shaft 19 that is wound around the juxtaposed units 1 and is driven to rotate by one motor 18 is provided. A rotating roller (elastic yarn feeding roller) 21 for driving a package 20 (yarn winding unit) is attached to each unit 1. The package 20 of the elastic yarn 11 is rotatably supported by a cradle arm 23 which is attached to a horizontal shaft 22 so as to be able to raise and lower. The elastic yarn package 20 is configured to contact the rotation roller 21 and receive the rotation thereof. As shown in FIG. 4, a stopper 24 for stopping rotation of the package 20 when the core yarn 12 breaks is provided between the rotating roller 21 and the elastic yarn package 20 so as to be freely inserted and removed.

More specifically, as shown in FIG. 4, the stopper 24 is rotatably supported by a support shaft, and the tip of the stopper 24 is moved between the rotation roller 21 and the elastic yarn package 20 by the rotation thereof. It is configured to be inserted and removed. The stopper 24 is not in contact with the rotating roller 21,
1 and the package 20. Stopper 24
Is connected to an actuator 29 which normally keeps the stopper 24 pulled out from between the rotary roller 21 and the package 20, and which rotates the stopper 24 based on a signal from the slab catcher 17. The elastic yarn package 20 is inserted between the package 21 and the package 20 to stop the rotation. This actuator 29 is controlled by a control device 51 via a cradle electromagnetic control valve 50 as shown in FIG.

First, at the start of spinning, in which the operation of the core yarn manufacturing apparatus is performed for the first time, the elastic yarn 1 is removed from the package 20.
The elastic yarn 11 is sucked into the funnel part 60 of the elastic yarn supply device 10 by a manual operation of an operator, and the air sucking device 58 for air threading.
After passing through the elastic yarn detection sensor 32 and the clamp cutter device 33, the elastic yarn is supplied from the elastic yarn supply guide cylinder 59 to a position in front of the front roller 9. The funnel portion 60, the air sucking device 58 for air slitting, the clamp cutter device 33, and the elastic yarn supply guide cylinder 59 are integrally housed in the rotating box 52 as a whole. This is because the draft device 6 described above is used to check and repair the sliver 4 in the draft device 6 in the first stage of spinning.
When the upper handle is lifted by operating the lifting handle 53, the elastic thread supply guide cylinder 59 can be rotated left and right so as to be retracted so as not to hinder the lifting.

The frame 1 of the unit 1 of the core yarn manufacturing apparatus
As shown in FIG. 2, a is formed in a cross section C with an open front surface, and rails 37.
38 are laid, and along the rails 37 and 38,
The yarn joining cart 39 is arranged so as to be able to run freely. The yarn joining cart 39 is provided with a suction nozzle (drawing device) 41 which is a suction tube which is rotatable in a vertical direction, and a suction mouth 42 which is rotatable. The suction nozzle 41
FIG. 2 shows that the suction port is located below the yarn splicing section 40.
As shown by a dashed line in FIG. 2, the suction port is rotated upward from the yarn guiding position A to a position near the outlet of the air spinning device 13 (yarn catching position).
The yarn end on the spinning side of No. 3 is sucked, and then the yarn end is
Is returned to the yarn guiding position A. Further, the suction mouth 42 is in a standby position B (FIG. 2) in order to guide the yarn end sent out by reversing the winding package 15 held by the lower winding device 16 to the yarn joining portion 40.
Rotate and pull up.

A cam 43 for driving the suction nozzle 41 and the suction mouth 42 is provided on the yarn joining carriage 39.
And a cam motor M for driving the cam 43, a blower for generating suction, and the like. A suction nozzle 41 is provided on the yarn joining carriage 39 at a standby position (yarn guide position) A.
When the suction port moves to the yarn catching position located near the outlet of the pneumatic spinning device 13, a nozzle detection sensor 44 for detecting the suction port is provided, and the cam 43 rotates once. The one-cycle end detection sensor 45 is provided. While the cam 43 makes one rotation, first, the operation of pulling up the yarn end of the suction mouth 42 on the winding device 16 side is completed, and then the yarn end on the air spinning device 13 side is moved toward the yarn joining section 40. The operation of the suction nozzle 41 to be drawn is completed.

The suction nozzle 41 is arranged in a vertical direction.
The suction tube is not limited to swivel, but is a movable suction tube. In the present embodiment, the suction nozzle 41 is rotatable only in the vertical direction. The in-suction-nozzle sensor 66 shown in FIG. 4 functions as a detection unit that detects the presence or absence of a yarn in the suction path of the suction nozzle 41. A control device is provided on the yarn joining vehicle 39 side, and the control device (hereinafter, referred to as a “trolley-side control device”) controls the cam motor M based on the detection result of the sensor 66 in the suction nozzle. Signals can be exchanged between the control device 51 on the unit 1 side and the bogie-side control device by signal transmission means (not shown). This signal transmission means may be non-contact communication means.

Next, a suction nozzle 41 serving as a suction pipe is used.
Is rotated downward, the yarn sucked by the suction nozzle 41 accompanying this rotation enters between the nip roller and the delivery roller of the yarn feed roller 14, and is gripped by both rollers so that the feed force is applied. Has become. In this state, when the sensor 66 in the suction nozzle detects the presence of the yarn, the (incomplete) yarn spun by the fiber bundle 5 alone is
It is determined that the yarn is smoothly discharged from the air spinning device 13 by the air ejection of the yarn discharge suction flow generating nozzle 82 described later, and that the yarn feeding roller 14 applies a feeding force to the yarn. Then, based on the above determination, the control device 51 controls the elastic yarn supply device 10 to start supplying the elastic yarn 11, thereby completing the complete core yarn in which the elastic yarn 11 is included in the fiber bundle 5. Supply is started.

Next, the construction of the air spinning device 13 and the suction flow generating nozzle 82 for discharging the yarn will be described with reference to FIGS. FIG. 12 is a sectional view of the pneumatic spinning device 13 provided with the hollow guide shaft 80. FIG. 13 is a cross-sectional view showing the behavior of the fiber bundle 5 during spinning by the air spinning device 13.
FIG. 14 is an enlarged sectional view showing details of the hollow guide shaft body 80.

As shown in FIG. 12, the pneumatic spinning device 13 includes a nozzle block (member) B and a hollow guide shaft 80. A pneumatic spinning nozzle 86, which is a swirling air flow generating nozzle, is formed in a nozzle block B of the pneumatic spinning device 13, and a fiber introduction hole 83 of a fiber introduction member 84 into which the fiber bundle 5 is introduced. Is provided.
Further, the nozzle block B is provided with a needle 85. The needle 85 is disposed coaxially with the yarn passage 81 of the hollow guide shaft 80, and has a function of guiding fibers from the fiber introduction hole 83 to the yarn passage 81 of the hollow guide shaft 80, and a function of blocking the balloon. The function of preventing propagation of false twist toward the front roller 9 and facilitating the fiber to be inverted at the tip of the hollow guide shaft 80 is achieved. The needle 85 serving as a guide member is not limited to a single needle-like needle as shown in the drawing, but forms a fiber guide space surrounded by a plurality of members, and the fibers that have exited the fiber introduction holes 83 are used for the fiber guide. The guide may be guided to the yarn passage 81 of the hollow guide shaft 80 through the space. In the hollow guide shaft 80, FIG.
As shown in FIG. 4, a yarn discharge suction flow generating nozzle 82 is formed in the middle of a yarn passage 81 formed continuously from the front end inlet to the discharge outlet. The nozzle 82 has a thread passage 81
It is configured such that an air flow from the front end inlet to the discharge port can be generated therein, and the air flow can draw the fiber into the yarn passage 81.
The fiber bundle 5 receives the swirling airflow generated by the air spinning nozzle 86 at the distal end of the hollow guide shaft body 80, and
While being wound around the core fiber that is formed by the hollow guide shaft 80, it is guided to the yarn passage 81 of the hollow guide shaft 80. As a result, spinning is performed to produce a real twist spun yarn, and the elastic yarn 11
Is formed at the center.

More specifically, the fiber bundle 5 and the elastic yarn 11 discharged through the fiber introduction hole 83 are pushed by the swirling airflow to hit the needle 85, and are wound around the needle 85 as shown in FIG. It is introduced into the hollow guide shaft body 80 while hanging. Fiber bundle 5 discharged from the fiber introduction hole 83
Is introduced into the hollow guide shaft 80 in a state where the fibers are wound around the spun yarn being formed near the front end of the hollow guide shaft 80. On the other hand, the rear end side of the fiber is once loosened and inverted as shown in FIG. 13 by the action of the swirling airflow in the spinning chamber (which is a space formed between the nozzle block B and the hollow guide shaft 80). Then, it is spirally wound around the outer peripheral surface of the hollow guide shaft body 80. However, immediately after that, the rear end side of the fiber is drawn into the hollow guide shaft 80 while being swung around the fiber bundle 5 toward the inside of the hollow guide shaft 80 by the swirling airflow.

As described above, the rear end side of the fiber is wound around the outer periphery of the fiber bundle 5 toward the inside of the hollow guide shaft body 80 to form a real twisted spun yarn. At this time, the fiber introduction hole 83 is formed in the fiber bundle around which the rear end side of the fiber is wound.
Also included is the front end side of the fiber newly discharged from, and when the rear end side of the other fibers also approaches the hollow guide shaft 80,
As described above, the fiber bundle 5 is swung around the fiber bundle 5 and wound around the outer periphery of the fiber bundle 5.

As described above, in the spinning chamber, the fibers are swung by the swirling airflow and twisted. However, the fiber bundle 5 is sent after being wound around the needle 85 once. Spinning can be performed well without propagating.

A yarn discharge suction nozzle 8 shown in FIG.
Numeral 2 acts to generate a suction flow that draws fibers into the yarn passage 81 by jetting compressed air from the nozzle 82. By operating the nozzle 82 in addition to the air spinning nozzle 86 at the start of spinning, the tip of the elastic yarn 11 or the fiber bundle 5 is sucked and introduced into the hollow guide shaft 80, and the predetermined strength (the suction nozzle 41 is This makes it possible to discharge the spun yarn having a strength such that the spun yarn is not broken even when pulled out by being rotated. The yarn discharge suction flow generating nozzle 82 does not perform injection during normal spinning, and drives the draft device 6 and the air spinning device 13 when splicing the yarn on the spinning side and the yarn on the winding side. When restarting, the air spinning nozzle 86 and the yarn discharge suction flow generating nozzle 82 operate only for a predetermined time to perform jetting spinning in which the air is spouted by generating jet air. The operation / stop of the yarn discharge suction flow generating nozzle 82 is controlled by the control device 51 switching the switching valve 76 shown in FIG. In the present invention, since the yarn discharge suction flow generating nozzle 82 constituted by the hollow guide shaft 80 is provided in the portion of the air spinning device 13, it is possible to automatically perform the yarn feeding when the spinning is restarted. is there.

Further, spinning by the air spinning device 13 as in the present invention causes a spinning principle in which a fiber having a long fiber length is shifted toward the center and a fiber having a short fiber length is wound around the outside. In this embodiment, the short fibers are used as the fiber bundles 5 of the covering, so that the elastic yarn 1 shown in FIG.
Good covering properties in which no twist is imparted to No. 1 are obtained.

Paying attention to the wrapping shape of each covering fiber constituting the fiber bundle 5, FIG.
As shown in the figure, a part of the region 5x on the front end side of the fiber is placed in a direction substantially parallel to the longitudinal direction of the core yarn 12 and is wound around the elastic yarn 11 as the core fiber, while the remaining rear end region 5y is shaped so as to spirally wind away from the elastic yarn 11 (shape spirally wound around a conical body). Each of these fibers is shown in FIG.
The core yarn 12 is formed by being wound around the elastic yarn 11 one after another as shown in FIG. Specifically, the front end side of the fiber 5a is substantially parallel to the longitudinal direction of the core yarn 12, and the rear end side of another fiber 5b is spirally wound therearound. The distal end of the other fiber 5b is also substantially parallel to the longitudinal direction of the core yarn 12, and the rear end of another fiber 5c is spirally wound therearound. In this manner, the periphery of the front end side of each fiber 5, 5... Is wound around the rear end side of the other fiber. Since the portion of the fiber 5 on the side to be wound is the spiral portion 5y as described above, the fiber 5,5.
When attention is paid to the fiber structure of the core yarn 12 of the present invention, as shown in FIGS. 7A and 7B, the elastic yarn 11 as the core yarn is disposed at the center of the core yarn. Are parallel to the longitudinal direction. On the other hand, the leading end side of the covering fiber 5 is gathered at the center of the core yarn while being directed parallel to the core yarn longitudinal direction (longitudinal direction of the elastic yarn 11), and the rear end side is wound in a spiral state and the outer surface of the core yarn. It is exposed to. Then, the rear end of one fiber wraps around another succeeding fiber, the rear end of the other fiber wraps around another succeeding fiber, and so on.
As such, because the rear end of the leading fiber is wound continuously around the fiber on the succeeding side, it has a continuous structure,
It exhibits great durability against ironing in the direction along the core yarn longitudinal direction.

On the other hand, in the case of a core yarn manufactured by a ring spinning machine, not only the covering fiber but also the core fiber (elastic yarn) is twisted, and the covering fiber is entirely irrespective of its front end and rear end. Are spirally twisted, and each covering fiber is arranged in parallel with (along other fibers) other fibers. Further, the elastic yarn as the core yarn is twisted substantially parallel to the covering fiber. Such a structure results in a yarn that is weak against ironing in the core yarn longitudinal direction.

The core yarn 12 manufactured by the core yarn manufacturing apparatus of the present invention has a strong binding between the core fiber (elastic yarn 11) and the covering fiber (fiber bundle 5).
Durability against ironing when the core yarn 12 is pulled in the longitudinal direction of the core yarn 12 (elastic yarn 11) (property)
Is based on the strengthening of the binding of the fiber bundle 5 to the elastic yarn 11,
It is larger than the single yarn strength (tensile breaking strength) of the core yarn 12. Therefore, the durability against ironing is
When the core yarn 12 is strongly pulled in the longitudinal direction of the core yarn 12, the fiber bundle 5 (covering fiber) moves from the elastic yarn 11 so as to be cut off before the elastic yarn 11 is exposed. The strength of the elastic yarn 11 contributes to the strength of the single yarn as the core yarn. By the spinning, the core yarn 12 having excellent durability against ironing and having the fiber bundle 5 as the covering fiber as the short fiber can be produced at high speed.

Next, the structure of the elastic yarn supply device 10 will be described. As shown in FIG. 4, the funnel part 60 is arranged so that the end of the elastic thread 11 can be easily sucked in a manual operation. An air soccer device 58 for air slitting is fixed below the funnel 60. In addition, below the air soccer device 58 (downstream side), the clamp cutter device 33 is disposed. The elastic yarn detection sensor 32 is disposed between the air soccer device 58 for air setting and the clamp cutter device 33. The elastic yarn detecting sensor 32 detects the elastic yarn 11 between the air sucking device 58 and the clamp cutter device 33 during the first yarn setting.
Is detected based on the presence or absence of the elastic thread 11. The elastic yarn detecting sensor 32 is constituted by a non-contact type sensor, and has a role of preventing the elastic yarn 11 from adhering. Further, even when the yarn is stopped, the presence / absence of the yarn can be detected because the elastic yarn detection sensor 32 exists. The elastic yarn detection sensor 32 is
In FIG. 4, the air sucking device 58 is disposed between the air sucking device 58 and the clamp cutter device 33, but may be disposed anywhere between the rotating roller 21 and the clamp cutter device 33.

Air soccer device 5 for air letting
8 includes, for example, a plurality of threading members provided with threading holes having different sizes (diameters), and the plurality of threading members are arranged such that the size of the threading hole on the same axis is on the downstream side, that is, It can be configured such that it is disposed so as to become smaller toward the elastic yarn supply guide cylinder 59 side described later. This allows the elastic thread 11 to be threaded by air flowing on the center axis of the threading hole while effectively releasing air from the gap between the threading members. And the elastic yarn 11 can be reliably supplied to the draft device 6 without loosening.

Below the clamp cutter device 33, toward the elastic yarn supply position for the draft device 6 (between the middle roller 8 and the front roller 9 in this embodiment).
The elastic yarn supply guide cylinder 59 projects as an elongated cylinder. Considering the quality of the yarn, it is preferable that the elastic yarn supply guide cylinder 59 extends straight downward so that the elastic yarn 11 does not bend and the drawing ratio is stabilized. A portion of the air sucking device 58 for air slitting, the clamp cutter device 33 and the elastic thread supply guide cylinder 59 is housed in a rotating box 52 so as to be integrally rotatable. Due to the fact that half of the cradle part supporting the top roller side of the draft device 6 can be lifted up by operating the lifting handle 53 for the inspection and repair of the draft device 6. ,
When the cradle of the draft device 6 is lifted, the elastic yarn supply guide cylinder 59 is turned or moved left and right so as not to be in the way, and can be avoided.

The stretching ratio of the elastic yarn 11 is
The difference can be given by the difference in the peripheral speed ratio between 1 and the yarn feed roller 14. That is, by configuring the peripheral speed of the yarn feed roller 14 to be higher than the peripheral speed of the rotary roller 21,
The elastic yarn 11 can be maintained in a stretched state, for example, about four times or more between the rotation roller 21 including the spinning section and the yarn feed roller 14. Then, spinning is performed while the fiber bundle 5 is wound around the outer periphery of the elastic yarn 11 using the swirling airflow from the air spinning nozzle 86 while maintaining the elastic yarn 11 at a predetermined stretching ratio.

At the same time as the winding of the fiber bundle 5 around the elastic yarn 11, a part of the fiber bundle 5 is wound around the elastic bundle 11 and spirally wound around the elastic yarn 11 as shown in FIG. 5 (b), forming a binding portion K which is partially wound, as shown in FIG.
By winding the binding portion K, the elastic yarn 11 and the fiber bundle 5 are brought into close contact with each other to be integrated. The difference between these configurations is, for example, that the front roller 9 shown in FIG.
This is caused by the difference in the distance from the tip of the hollow guide shaft body 80. The elastic yarn package 20 for feeding the elastic yarn 11 is supported above the rotating roller 21 by bearings.
The elastic roller 11 is rotationally driven by the rotating roller 21 in a direction in which the elastic yarn 11 is unwound and fed. The pulled out elastic yarn 11 is given a predetermined stretching ratio by the peripheral speed difference given between the rotating roller 21 and the yarn feed roller 14 and is given tension. In this way, in a stretched state, the elastic yarn is introduced into the air spinning device 13 from the front roller 9 together with the fiber bundle 5 after drafting the sliver 4, and is spun.

When a defect occurs in the yarn while the core yarn manufacturing device is in operation, the slab catcher 17 (FIG. 4) detects this and sends a signal to the control device 51. Upon receiving the signal, the control device 51 operates the cutter 63 to cut the yarn, and also cuts off the clutch 75 to cut off the power to the back roller 7 of the draft device 6 and stop it. By operating the actuator 29 through the stopper, the stopper 24 of the elastic yarn supply device 10 is inserted between the rotating roller 21 and the package 20, and the rotation of the elastic yarn package 20 is stopped. At the same time as the operation of the stopper 24, the electromagnetic control valve 56 is switched to close the clamp cutter device 33, and the elastic thread 11 is gripped by the clamp cutter device 33.

On the other hand, when the back roller 7 stops, the fiber bundle 5 downstream of the back roller 7 is torn off from the back roller 7 and both are sucked and removed from the suction port 26. in this way,
When a yarn defect is detected by the slab catcher 17, the cutter 63 operates to cut the core yarn 12, and an end of the cut core yarn 12 on the winding device 16 side is once wound into the winding package 15. It is. Thus, the unit 1 is in a state where piecing is required, and the control device 51 of the unit 1 transmits a piecing request signal.
The control device on the side of the piecing carriage 39 that has received the signal moves the trolley 39 to the unit 1 where the piecing is necessary and stops it.

In FIG. 4, reference numeral 71 denotes a slack tube which is generated at the time of splicing when the supply of the sliver 4 from the spinning side is resumed and the core yarn 12 at the spun side is sucked. It is arranged to suck the slack and secure the thread tension. Reference numeral 17 denotes a slab catcher for detecting the thickness of the core yarn 12 and cutting the yarn when detecting a fine yarn portion or a thick yarn portion. In FIG. 4, a yarn splicing impossible display plate 62 is a marker for passing the yarn splicing carriage 39 to the unit 1 that cannot be spliced, and a solenoid 65 that operates the yarn splicing impossible display plate 62.
And the connection link 68 is operated via the control device 51. Then, when the elastic yarn 11 is lost in the elastic yarn package 20 or when the clamp cutter device 33 cannot clamp the elastic yarn 11 and the elastic yarn detection sensor 32 does not detect the elastic yarn 11, , As shown in the figure, passes the yarn joining carriage 39 to notify the operator of the abnormality. The cutter 63 is also operated by the solenoid 65 and the connection link 67 via the control device 51.

Next, the operation procedure of the spinning apparatus of the present invention will be described. In preparation for starting the operation of the core yarn manufacturing equipment for the first time, manual operation by the operator,
Funnel part 6 of air soccer device 58 for air letting
At 0, the yarn end of the elastic yarn 11 unwound from the elastic yarn package 20 and hung downward by the rotating roller 21 is put. Then, the manual switch 55 (FIGS. 2 and 3) specially provided on the passage side of the rotating box 52 is turned on.
N operations are performed. A manual start signal is transmitted from the manual switch 55 to the control device 51, and an operation signal from the control device 51 causes the air soccer device 58 for air slitting to be performed.
The electromagnetic control valve 57 (FIG. 8) for controlling (FIG. 4) is opened,
A threading operation is performed in which high-pressure air is supplied to pass the end of the elastic yarn 11 through the air sucking device 58 for air slitting. Air soccer device 58 for air letting
At the same time, the distal end portion of the elastic yarn 11 sucked into and threaded passes through the elastic yarn detection sensor 32 and the clamp cutter device 33. The end of the elastic thread 11 is cut by the cutter and is held by the clamp device. Thus, the preparation of the elastic yarn supply device 10 is completed. That is, when the manual switch 55 is turned on, the elastic yarn 11
Of the elastic thread 11 passes through the air sucking device 58 for air slitting and the elastic yarn detection sensor 32, and the clamp cutter device 33 grips the distal end and cuts off the unnecessary distal end portion of the elastic yarn 11. .

On the other hand, a mechanism for automating piecing after a slab is generated during the operation of the core yarn manufacturing apparatus and the yarn is cut will be described.

In this embodiment constructed as shown in FIG. 4, when a slab is detected by the slab catcher 17, the core yarn 12 is cut by the cutter 63, the air spinning device 13 is stopped as described above, and the back roller 7 is stopped. The elastic yarn 11 is stopped by the clamp cutter device 33, and the elastic yarn 11 is stopped with its end cut and gripped.

The piecing is started from these states.
First, the control device 51 that has received the signal from the slab catcher 17 sends a signal to the control device of the yarn joining truck 39, and the bogie-side control device that has received the signal stops the yarn joining vehicle 39 in the unit 1 in a stopped state 1 until it stops at a position where the suction nozzle 41 matches the position of the unit 1. When the yarn joining bogie 39 arrives at the unit 1 in the stopped state, the bogie-side control device controls the cam motor M
Is rotated by a predetermined angle to rotate the suction nozzle 41, and the suction port is positioned near the discharge port of the air spinning device 13 as shown by the chain line in FIG. 2 or the solid line in FIG. ) To stop. This is the preparation process of the yarn feeding spinning. When this process is completed, the carriage-side control device transmits a preparation completion signal to the control device 51 of the unit 1. The control device 51 of the unit 1 that has received the preparation completion signal has stopped in a state where the suction nozzle 41 is at the above-described yarn catching position (a state where the suction port is located near the discharge port of the air spinning device 13). The back roller 7 is driven by connecting the clutch 75, and the spinning nozzle 86 is operated via the low-pressure switching valve 74, and the yarn discharge suction flow generating nozzle 82 is operated via the switching valve 76, respectively. 4. A yarn feed spinning for generating and discharging a spun yarn from No. 4 is performed.

As a result, only the fiber bundle 5 from the back roller 7 of the draft device 6 is passed through the middle roller 8 on which the apron is hung and the front roller 9 via the air spinning device 13.
(At this stage, the elastic yarn 11 is not yet supplied to the air spinning device 13), and the jet air from the yarn discharge suction flow generating nozzle 82 causes the incomplete yarn without the elastic yarn 11 to enter. The yarn is spun and discharged from the air spinning device 13. At this time, the suction nozzle 41 of the yarn joining carriage 39 is in a state of rotating to the upper yarn catching position, and the incomplete yarn discharged from the air spinning device 13 is sucked by the suction nozzle 41. ing.

At this time, as shown in FIG. 9, the spinning nozzle 86 is maintained at a low pressure for a predetermined time from the start of the operation, and is then switched to the same high pressure as during normal spinning. By maintaining the spinning nozzle 86 at a low pressure immediately after the start of the yarn spinning,
Since the fibers are suppressed from being swirled by the swirling airflow from the spinning nozzle 86 near the tip of the hollow guide shaft 80, the yarn passage of the hollow guide shaft 80 is suctioned by the yarn discharge suction flow generating nozzle 82. The fibers can be reliably taken into the inside 81, and the success rate of the yarn spinning is improved. This low pressure / high pressure switching control is performed by the high pressure switching valve 73 shown in FIG.
The control is performed by the controller 51 sending an appropriate signal to the low-pressure switching valve 74.

Here, if the yarn spinning and the yarn discharge are performed normally, the suction of the suction nozzle 41 causes the sensor 66 in the nozzle 41 to detect the presence of the yarn. The above-described bogie-side control device monitors the state of the sensor 66 in the suction nozzle at a predetermined time after the start of the yarn feeding and spinning, and determines whether or not the yarn feeding has succeeded (whether or not the spun yarn has been normally discharged). judge. That is, if the bogie-side control device detects the presence of the yarn by the yarn-starting detection sensor 66 during the predetermined time after transmitting the preparation completion signal to the unit 1 as described above, the yarn-starting spinning is successful. It is determined that it has been performed. On the other hand, the sensor 66 detects that there is a yarn during a predetermined time.
If it is not detected, it is determined that the yarn feeding spinning has failed.

When it is determined that the yarn spinning is successful, the bogie-side control device further rotates the cam motor M by a predetermined angle to rotate the suction nozzle 41 to the lower yarn guiding position. Since the suction of the suction nozzle 41 is continued even during the downward rotation, the yarn is pulled down while being sucked from the tip of the suction nozzle 41. In the process, the yarn during rotation of the yarn feed roller 14 is rotated. The yarn is gripped between the delivery roller and the nip roller, and a feeding force is applied to the yarn. If the yarn in the suction nozzle 41 is detected by the sensor 66, it is considered that the yarn has been pulled down normally while being sucked, and in the process, the yarn is
It can be inferred that the sheet is appropriately gripped between the delivery roller and the nip roller of No. 4 and a feeding force is applied. In the present embodiment, when the rotation of the suction nozzle 41 to the yarn guiding position is completed, the presence of the yarn in the nozzle 41 is confirmed again by the sensor 66 in the suction nozzle. When the presence of the yarn is confirmed by the sensor 66 in the state where the nozzle 41 is rotated downward, the bogie-side control device transmits a yarn-start detection signal (a yarn-start success signal) to the control device 51 of the unit 1. The control device 51 that has received the yarn-out detection signal regards the yarn pulled out by the suction nozzle 41 as being sandwiched by the yarn-feeding roller 14 and applying a yarn-feeding force.

After that, the control device 51 sets the elastic yarn supply device 1
0 is started to supply the elastic yarn 11 to the pneumatic spinning device 13, and the operation of the yarn discharge suction flow generating nozzle 82 is stopped while the operation state of the spinning nozzle 86 is maintained. More specifically, a predetermined time (see FIG. 9) after the controller 51 considers that the yarn feed force has been applied.
After the elapse of time t1), the control device 51 sets the air sucking device 58 to start suctioning.
A signal is sent to the electromagnetic control valve 57. After a lapse of a predetermined time (t2), the control device 51 releases the gripping state of the clamp cutter device 33 via the electromagnetic control valve 56,
At substantially the same time, the actuator 29 is operated via the electromagnetic control valve 50 to start rotating the elastic yarn package 20. As a result, the already driven air sucking device 58 sucks the elastic yarn 11 and guides it to the air spinning device 13. This allows
The elastic yarn (core fiber) 11 and the fiber bundle 5 are both supplied to the air spinning device 13, and the core yarn spinning is started. In other words, the normal core yarn 12 is generated in a form in which the elastic yarn 11 enters inside the yarn (incomplete yarn) spun only by the fiber bundle 5. At the time when the clamp cutter device 33 is opened, the yarn discharge suction flow generating nozzle 82 is still in the operating state, and at this time, the core yarn 12 starts the yarn discharge between the nozzle 82 and the spinning nozzle 86 by the jet air. It is a form generated by spinning.
Thereafter, the control device 51 controls the yarn discharge suction flow generation nozzle 82 to stop via the switching valve 76,
Spinning (normal spinning) using only the spinning nozzle 86 and the hollow guide shaft 80 is performed.

The yarn splicing section 40 performs splicing between the yarn on the spinning side and the yarn end on the side of the winding device 16 sucked by the suction mouth 42. Thus, the normal spinning / winding operation is started. In addition, an unnecessary portion of the yarn (an incomplete portion where the elastic yarn 11 does not enter, or the two nozzles 82 and 86
The portion of the core yarn 12 generated by the yarn spun spinning with the jet air is cut off by a cutter (not shown) of the yarn joining portion 40 during the yarn joining operation, and is all sucked and removed into the suction nozzle 41. As shown in the timing chart of FIG. 9, after the elastic yarn 11 is supplied, the injection air of the yarn discharge suction flow generation nozzle 82 is stopped, and the operation is switched to normal spinning using only the spinning nozzle 86. The above-described yarn splicing operation by 40 is performed. Therefore, at the time when the yarn joining portion 40 actually performs the yarn joining operation, the elastic yarn 11 is in the inside, and the core yarn 12 generated by normal spinning using only the spinning nozzle 86 reaches the yarn joining portion 40. As a result, only the core yarn by the normal spinning is wound around the package 15.

As described above, in this embodiment, the bogie-side control device receives the yarn detection signal of the sensor 66 in the suction nozzle, and transmits the yarn-out detection signal of the bogie-side control device which is transmitted based on the signal. After receiving the signal 51 and determining that the feed force has been applied to the incomplete yarn by the yarn feed roller 14, control is performed such that the air sucker device 58 is operated and the supply of the elastic yarn 11 is started. It is doing. Therefore, after confirming that the yarn discharged from the air spinning device 13 (the yarn pulled out by the suction nozzle 41) is in a state where a strong feeding force is applied by the yarn feeding roller 14, the elastic yarn 11
Supply has started. This is because the yarn feed roller 1 starts from an incomplete yarn stage in which the elastic yarn 11 is not contained.
4 means that a process of applying a downstream feeding force in advance and then putting the elastic yarn 11 into the yarn is performed. Therefore, the elastic yarn 11 that is easily contracted can be reliably guided into the fiber bundle 5 and sent to the downstream yarn joining portion 40 side while being taken into the fiber bundle 5, thereby improving the certainty and stability of the yarn joining operation. It is excellent. In other words, the threading of the elastic yarn 11 to the pneumatic spinning device 13 can be performed reliably while riding the normal fiber bundle 5 (yarn). That is, the elastic yarn 11 having high elasticity and easily contracting does not clog the air spinning device 13.

In the present embodiment, the control device 51 determines that the sensor 66 in the suction nozzle 41 has detected the presence of the yarn after the suction nozzle 41 has rotated downward, and the yarn is fed by the yarn feed roller 14. Is determined (detected) indirectly, as it were. That is,
The sensor 66 that constitutes the detection unit has a role as a detector that detects that the yarn has been normally released using the yarn discharge suction flow generation nozzle 82, and the yarn is fed by the yarn feed roller 14. It also serves as a detector for detecting that the feed force is applied.

The bogie-side control device, which has determined in the above-described determination operation that the yarn feeding has failed, transmits a yarn-out failure signal to the control device 51 of the unit 1. In such a case, it is presumed that an abnormality such as loss of the fiber bundle 5 or the like has occurred.
Immediately stops the back roller 7 by disengaging the clutch 75, thereby stopping the supply of the sliver 4 (fiber bundle) to the pneumatic spinning device 13. At this time, it is desirable that the operations of the spinning nozzle 86 and the yarn discharge suction flow generating nozzle 82 are also stopped. By immediately stopping the supply of the sliver 4, the winding of the sliver 4 around the front top roller can be suppressed, and the front top roller can be prevented from being damaged. After the above control, the control device 51 notifies the operator of the abnormality by using the yarn splicing disable display plate 62 or the like.

As described above, splicing after yarn cutting due to slab generation and restart of operation are automatically performed. The following variations are also conceivable as a control structure for automatic splicing work. That is, when the suction nozzle 41 is in the upward rotation state, the sensor 66 in the nozzle 41 detects that the yarn has been sucked (the presence of the yarn), and then the suction nozzle 41 is rotated downward. Regardless of the detection result of the in-suction nozzle sensor 66 at that time, it is considered that the yarn has been gripped between the delivery roller and the nip roller of the yarn feed roller 14 by this downward rotation, and the same elastic yarn as described above is used. 11 is configured to perform the closing operation. That is, after the downward rotation of the suction nozzle 41, the confirmation of the presence of the yarn in the nozzle 41 by the sensor 66 is omitted.

Alternatively, a separate sensor is provided in the vicinity of the yarn feed roller 14 so that the suction of the yarn by the suction nozzle 41 is detected by the sensor 66 in the nozzle 41, while the delivery roller and the nip roller of the yarn feed roller 14 are detected. May be detected by the separately provided sensor that the yarn is gripped (that is, the feeding force is applied). In this case, the detection unit is constituted by the two sensors. Alternatively, it may be constituted by only a sensor for detecting that the yarn is gripped between the two rollers of the yarn feed roller 14.

Alternatively, when the bogie-side control device detects the presence of the yarn by the sensor 66 in the suction nozzle when the suction nozzle 41 is at the yarn catching position, and detects that the yarn is being spun normally, the suction nozzle Before rotating the controller 41 downward, the controller 51 on the unit 1 side
May be transmitted. Then, it is assumed that the control device 51 activates the elastic yarn supply device 10 immediately after receiving the yarn out detection signal. In this case, even before the feed force by the yarn feed roller 14 is applied, the feed force by the suction force of the suction nozzle 41 is applied to the yarn discharged from the pneumatic spinning device 13. In this way, by starting the supply of the elastic yarn after confirming that the yarn spinning and spinning has been performed normally, the elastic yarn is passed through the air spinning device 13 while riding the normal fiber bundle (yarn), Regardless of the characteristic that the elastic yarn has a large elasticity and is easy to shrink, the threading is surely performed. Then, while the complete core yarn 12 containing the elastic yarn 11 is sucked by the suction nozzle 41, the suction nozzle 41 is rotated downward, pulled out downstream, and spliced. This is particularly effective when the suction nozzle 41 has a suction force enough to pull out the yarn 12 containing the easily contractible elastic yarn 11 to the downstream side while reliably sucking the yarn 12 by the downward rotation. However, after the suction nozzle 41 was rotated downward, it was confirmed that a strong feed force was applied to the yarn by detecting that the yarn was gripped by the yarn feed roller 14 (assuming that the yarn was gripped). Starting the supply of the elastic yarn 11 later is more preferable from the viewpoint of more surely performing yarn splicing and splicing of the core yarn using the elastic yarn 11 as the core fiber. That is, the feed force that is gripped and sent by the yarn feed roller 14 is
This is because the suction force of the suction nozzle 41 is larger than the feed force.

The elastic yarn detecting sensor 32 is for detecting whether or not the elastic yarn 11 is located at a position between the rotating roller 21 and the clamp cutter device 33 in the elastic yarn supplying device 10. When the elastic yarn 11 is not present, the sensor 32 that has detected the elastic yarn 11 transmits a signal to the control device 51, and the control device 51 determines that a situation has occurred such as the elastic yarn 11 having disappeared from the elastic yarn package 20. do it,
The spinning operation will be stopped. Furthermore, in this case, the above-described yarn joining cart 39 is
Is controlled by a display operation such as a yarn splicing impossible display plate 62 shown in FIG.

When the core yarn 12 is fully wound by the winding device 16 and doffing is performed, high-pressure air is supplied from the cradle electromagnetic control valve 50 to the actuator 29 by a signal from the control device 51 shown in FIG. Supply and stopper 24
Is rotated to lift the elastic yarn package 20 so that the elastic yarn 11
Is stopped, and at the same time, the core yarn 12 is cut by the cutter 63 shown in FIG.

Next, a modified example of the driving structure of the elastic yarn package 20 will be described. In FIG. 11, in FIG.
FIG. 3 illustrates a configuration in which a portion that serves as a mechanism for controlling rotation / non-rotation of the elastic yarn package 20 by rotating a stopper 24 by an actuator 29 is controlled by a yarn feeding motor Mo. The drive of the rotating roller 21 is independently controlled by the yarn supply motor Mo for each unit 1, and the elastic yarn package 20 and the rotating roller 21 may be always in contact with each other. The yarn feeding motor M
o can be controlled via the control device 51, and the stretching ratio of the elastic yarn can be varied by rotating the elastic yarn package 20 at a different rotation speed for each unit 1. Accordingly, it is possible to produce a plurality of types of core yarns having different yarn qualities in one production apparatus. In addition, by performing single-mass drive by the yarn supply motor Mo, it is possible to independently drive / stop the elastic yarn package 20 for each unit 1.
Therefore, for example, when the elastic yarn 11 is wound around the rotating roller 21, there is also an advantage that the rotation of the rotating roller 21 alone can be stopped to repair or the yarn can be removed immediately. It is.

FIG. 10 shows that the core yarn produced by the ring spinning machine, the core yarn produced by the conventional spinning method or apparatus using the covering fiber as staple fiber, and the covering fiber as 100% cotton.
The drawing ratio-yarn strength characteristics of the elastic yarn 11 as the core fiber between the core yarn manufactured by the manufacturing method of the present invention and the core yarn are shown. According to FIG. 10, in the spun yarn in which the covering fiber is 100% cotton, the draw ratio is 4%.
If less than twice, the yarn tenacity is low compared to other spun yarns. However, when increasing the draw ratio, the draw ratio is set to 4
By increasing the draw ratio at the vicinity of the draw ratio, a result in which the tendency of the yarn strength to increase was remarkably obtained was obtained.

This is because the single yarn strength is the strength of the core fiber and
It depends on the binding strength of the covering fibers. As shown in the lower part of FIG. 10, the cross section of the core yarn 12 when the draw ratio is low is not sufficient because the elastic yarn 11 is not sufficiently pulled. Large cross-sectional area,
As the proportion of the surrounding covering fiber (fiber) is small, the covering fiber (100% cotton) wrapped around the elastic yarn 11 is small and the binding is weak, but the elastic yarn 11 is pulled. It is considered that when the spinning is performed, the cross-sectional area of the elastic yarn 11 is reduced, and the proportion of the covering fiber to be wrapped is increased accordingly, so that a strong binding is obtained and the strength is increased.

Further, the yarn strength of the core yarn 12 of the present invention is leveling off when the draw ratio is about 5 times. This is because, as shown in the lower part of FIG. 10, even if the draw ratio increases, the change in the cross-sectional area (diameter) of the elastic yarn 11 decreases with an increase in the draw ratio, and the change in the amount of wound fibers also decreases. it is conceivable that. In consideration of the above result and the limit of the tensile breaking strength of the elastic yarn 11 itself, the stretching ratio of the elastic yarn 11 is, for example, 4 to 6 times at 40 denier (unit indicating the thickness of the yarn), 105 times. 4.5 in denier
It is preferable that the density be 5 times to 8 times at 140 denier.

Therefore, according to the manufacturing method of the present invention, not only the coverability of the fiber bundle 5 to the elastic yarn 11 can be improved, but also
The strength of a spun yarn using 100% cotton as a covering fiber can be made close to the strength of another spun yarn. Furthermore, by stretching the elastic yarn 11 as described above and spinning,
Sufficient elasticity can be obtained, and a core yarn longer than the length of a normal elastic yarn can be obtained. That is,
The length of the core yarn generated per unit weight of the elastic yarn 11 can be increased. In addition, as shown in Japanese Patent No. 2703189, compared with a ring spinning machine,
High speed spinning more than doubled becomes possible.

When the core yarn is used for a loom, sewing or the like, the elastic yarn 1 is stretched at a plurality of draw ratios by a ring spinning machine.
When the yarn is cut, the core yarn produced by stretching the elastic yarn 11 has a weak binding with the surrounding covering fiber, so that the elastic yarn 11 tries to shrink and shrinks in the longitudinal direction of the core yarn. That is, a portion where the elastic yarn 11 is not inserted occurs. Therefore, in consideration of the contraction of the elastic yarn 11, a core yarn longer than the length of the core yarn actually required for weaving and sewing is prepared. A large seam allowance was required. However, when the core yarn of the present invention is used, the core yarn is formed by stretching the elastic yarn 11 at a multiple draw ratio, and even when the yarn end is cut, the binding with the surrounding covering fiber is not performed. So strong
Since the covering fiber suppresses the contraction of the elastic yarn 11,
The degree of shrinking in the core yarn longitudinal direction can be reduced. Therefore, unlike the core yarns generated by the ring spinning machine, unnecessary core yarns are reduced, and it is not necessary to prepare an extra seam allowance in the case of sewing, so that the cost of the raw material of the elastic yarn 11 can be reduced.

[0066]

As described above, the present invention has the following advantages.

A draft device for drafting a fiber bundle, an elastic yarn supply device for supplying an elastic yarn serving as a core fiber to the fiber bundle, and an elastic yarn and a fiber bundle are introduced and swirling air is supplied to them. An air spinning device for producing a core yarn by applying a flow, a yarn feeder disposed downstream of the air spinning device, a winding device for winding the core yarn out of the yarn feeder, and a spinning side A yarn splicing device for splicing the core yarn and the take-up core yarn, a pull-out device for pulling out the yarn discharged from the pneumatic spinning device and guiding the yarn to the yarn splicing device. A detection device for detecting the presence of the yarn in the pull-out device, and a control device for controlling the supply of the elastic yarn by the elastic yarn supply device based on the detection result of the detection device,
After confirming the presence of the yarn in the drawing device, the supply of the elastic yarn to the fiber bundle can be started. That is, at the start of spinning, after confirming that the fiber bundle that has exited from the draft device has been discharged from the air spinning device as a normal spun yarn, supply of the elastic yarn to the fiber bundle can be started. As described above, by combining the elastic yarns while the fiber bundle (spun yarn) is running normally through the air spinning device, even if the elastic yarn has a large elasticity, the fiber bundle (spun yarn) can travel. Ride through the pneumatic spinning device. Therefore, it is possible to reliably prevent the elastic yarn from being clogged in the pneumatic spinning device, and it is possible to realize a reliable automation of threading and splicing of the core yarn using the elastic yarn as the core fiber.

Also, after confirming that the fiber bundle (spun yarn) is running normally through the air spinning device, the elastic yarns are merged, so that the fiber bundle is threaded out (the spun yarn is generated from the fiber bundle). It is possible to prevent the supply of the elastic yarn in a state where the discharge from the air spinning device has failed. Therefore, it is possible to prevent only the elastic yarn from being pulled out by the pull-out device and guided to the yarn splicing device, and being spliced with the core yarn on the winding side. That is, it is possible to prevent the portion of only the elastic yarn from being mixed into the wound winding body (winding package).

Further, when the spun yarn is not detected by the detecting device within a predetermined time from the start of driving of the draft device (back roller), the draft device (back roller) is immediately stopped without supplying the elastic yarn. In addition, it is possible to prevent the fiber bundle continuously supplied from being wound around the draft roller (front roller). Therefore, the recovery operation can be performed in a short time, and damage to the draft roller can be prevented.

According to a second aspect of the present invention, a drafting device for drafting a fiber bundle, an elastic yarn supply device for supplying an elastic yarn as a core fiber to the fiber bundle, an elastic yarn and a fiber bundle are introduced, and swirling air is introduced into them. An air spinning device for producing a core yarn by applying a flow, a yarn feeder disposed downstream of the air spinning device, a winding device for winding the core yarn out of the yarn feeder, and a spinning side A yarn splicing device for splicing the core yarn and the take-up core yarn, a pull-out device for pulling out the yarn discharged from the pneumatic spinning device and guiding the yarn to the yarn splicing device. A detecting device that detects that the yarn pulled by the pulling device has been given a feeding force by the yarn feeding device;
A control device for controlling the supply of the elastic yarn by the elastic yarn supply device based on the detection result of the detection device, so that the yarn discharged from the pneumatic spinning device is provided with a feeding force by the yarn feeding device. Thereafter, the supply of the elastic yarn to the fiber bundle can be started. That is, at the start of spinning, the fiber bundle that has exited from the drafting device is discharged from the air spinning device as a normal spun yarn, and after confirming that the spun yarn has been given a strong feeding force by the yarn feeding device, The supply of the elastic yarn can be started. Thus, the yarn feeder acts on the spun yarn discharged from the air spinning device,
By combining the elastic yarns in a state in which a strong feeding force is applied to the spun yarns by the feeding device, even if the elastic yarns are large in elasticity, the yarns are spun on a running fiber bundle (spun yarn). It passes through the device without fail. Therefore, it is possible to reliably prevent the elastic yarn from being clogged in the pneumatic spinning device, and it is possible to realize a reliable automation of threading and splicing of the core yarn using the elastic yarn as the core fiber.

Further, the fiber bundle (spun yarn) normally travels through the air spinning device, and the elastic yarn is joined after the feeding force of the yarn feeding device is applied to the spun yarn. It is possible to prevent the supply of the elastic yarn in a state where the dispensing (forming the spun yarn from the fiber bundle and discharging the spun yarn from the air spinning device) has failed. Therefore, it is possible to prevent only the elastic yarn from being pulled out by the pull-out device and guided to the yarn splicing device, and being spliced with the core yarn on the winding side. That is,
It is possible to prevent the portion of only the elastic yarn from being mixed into the wound winding body (winding package).

According to a third aspect of the present invention, the drawing device is a movable suction tube, and the detection unit is configured to detect the presence or absence of the spun yarn in a suction path of the suction tube. By moving the pipe, the spun yarn (spinned yarn consisting of only fiber bundles or spun yarn containing elastic yarn) can be easily pulled out for splicing. The state of being pulled out can be easily and reliably detected.

According to a fourth aspect of the present invention, the elastic yarn supplying device includes an air sucker device and a clamp cutter device, and the control device is configured to control the air sucker device to start supplying the elastic yarn. After the elapse of a predetermined time from the operation, the gripping of the elastic yarn by the clamp cutter is controlled to be released, so that the suction of the air sucking device for air threading is started before the release of the gripping state by the clamp cutter. By doing so, it is possible to prevent slack at the start of the supply of the elastic yarn, and it is possible to prevent troubles such as the elastic yarn being wound around a rotating roller or the like.

According to a fifth aspect of the present invention, the elastic yarn supplying device includes a feeding roller which rotates in contact with the elastic yarn supplying winding body, and the control device is adapted to start supplying the elastic yarn.
Controlling so that the feeding of the elastic yarn by the feeding roller is started almost simultaneously with the release of the elastic yarn by the clamp cutter, so that the air sucking device for air threading is operated first and then the supply of the elastic yarn is started. Therefore, the elastic yarn can be reliably supplied to the clamp cutter device and the merging path with the fiber bundle (the front roller 9 in the above-described embodiment) without slackening.

According to a sixth aspect of the present invention, the pneumatic spinning device includes a hollow guide shaft and a nozzle member for generating a swirling air flow at a tip end of the hollow guide shaft, and a yarn passage of the hollow guide shaft. The core yarn is generated by applying the swirling airflow from the nozzle while supplying the elastic yarn and the fiber bundle from the tip side to the core yarn, so it is possible to produce the core yarn excellent in coverability and durability against ironing at high speed. It was. In particular, it is effective to use short fibers such as 100% cotton as the covering fiber, that is, the fiber bundle.

[Brief description of the drawings]

FIG. 1 is a front view showing a core yarn spinning device and a yarn joining cart according to the present invention.

FIG. 2 is an enlarged side cross-sectional view of a spinning device and a yarn splicing cart shown in FIG.

FIG. 3 is an enlarged side view of a spinning unit, a suction nozzle, and a yarn joining cart.

FIG. 4 is an overhead view showing a spinning unit, a suction nozzle, and a main part of the present invention.

FIG. 5 is an enlarged view of the core yarn of the present invention.

FIG. 6 is an enlarged view of a conventional core yarn.

FIG. 7 is a perspective view showing how the covering fiber is wound.

FIG. 8 is a control block diagram of the core yarn spinning device of the present invention.

FIG. 9 is a timing chart of the core yarn spinning device of the present invention.

FIG. 10 shows a core yarn produced by a ring spinning machine, a core yarn produced by a conventional spinning method or apparatus using a covering fiber as a staple fiber, and a 100% cotton covering fiber, according to the production method of the present invention. The figure which shows the draw ratio-yarn strength characteristic of the elastic yarn 11 which is a core fiber with the manufactured core yarn.

FIG. 11 is a bird's-eye view showing a main part of the embodiment of the present invention in which a core fiber supply unit is driven by a motor.

FIG. 12 is a sectional view of a pneumatic spinning device 13 provided with a hollow guide shaft 80.

FIG. 13 is a cross-sectional view showing the behavior of the fiber bundle 5 during spinning by the air spinning device 13.

14 is an enlarged sectional view showing details of a hollow guide shaft body 80. FIG.

[Explanation of symbols]

 B Nozzle Block 1 Unit 5 Fiber Bundle 6 Draft Device 7 Back Roller 8 Middle Roller 9 Front Roller 10 Elastic Thread Supply Device 11 Elastic Thread 12 Core Yarn 13 Air Spinning Device 14 Thread Feeding Roller (Yarn Feeding Device) 15 Package 16 Winding Device 17 Slab catcher 20 Elastic yarn package (yarn supply winding body) 21 Rotary roller (delivery roller) 33 Clamp cutter device 39 Thread joining cart 40 Thread joining portion 41 Suction nozzle (suction pipe) 42 Suction mouth 51 Control device 52 Rotating box 58 Air Air soccer device for scretting 60 Funnel section 63 Cutter 64 Thread tension detection sensor 66 Sensor in suction nozzle (detection section) 80 Hollow guide shaft 82 Suction flow generation nozzle for thread discharge 83 Fiber introduction hole 85 Needle 86 Air spinning nozzle

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[Procedure amendment]

[Submission date] August 12, 2002 (2002.8.1
2)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 8

[Correction method] Change

[Correction contents]

FIG. 8

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 9

[Correction method] Change

[Correction contents]

FIG. 9

Claims (6)

[Claims] 1. A drafting device for drafting a fiber bundle, an elastic yarn supplying device for supplying an elastic yarn as a core fiber to the fiber bundle, and introducing an elastic yarn and a fiber bundle and causing a swirling air flow to act on them. An air spinning device for producing a core yarn, a yarn feeder disposed downstream of the air spinning device, a winding device for winding the core yarn out of the yarn feeder, and a core yarn on the spinning side A yarn splicing device for splicing the core yarn with the core yarn on the side. A drawing device for drawing out the yarn discharged from the pneumatic spinning device and guiding the yarn to the yarn splicing device; And a control device for controlling the supply of the elastic yarn by the elastic yarn supply device based on the detection result of the detection device. 2. A drafting device for drafting a fiber bundle, an elastic yarn supply device for supplying an elastic yarn as a core fiber to the fiber bundle, and introducing an elastic yarn and a fiber bundle and causing a swirling air flow to act on them. An air spinning device for producing a core yarn, a yarn feeder disposed downstream of the air spinning device, a winding device for winding the core yarn out of the yarn feeder, and a core yarn on the spinning side A yarn splicing device for splicing the yarn with the core yarn on the side, and a yarn drawing device for drawing out the yarn discharged from the air spinning device and guiding the yarn to the yarn splicing device. A detecting device that detects that the drawn yarn has been given a feeding force by the yarn feeding device; and a control device that controls supply of the elastic yarn by the elastic yarn supplying device based on a detection result of the detecting device. When, characterized by comprising a core yarn production apparatus. 3. The suction device according to claim 1, wherein the drawing device is a movable suction tube, and the detection unit detects the presence or absence of a thread in a suction path of the suction tube. Item 3. An apparatus for producing a core yarn according to item 2. 4. The elastic yarn supply device includes an air sucker device and a clamp cutter device, and the control device, when starting supply of the elastic yarn, starts a predetermined operation after the air sucker device is activated. The core yarn manufacturing apparatus according to any one of claims 1 to 3, wherein control is performed such that gripping of the elastic yarn by the clamp cutter device is released after a lapse of time. 5. The elastic yarn supply device includes a pay-out roller that rotates in contact with a yarn supply winding body of the elastic yarn, and the control device is configured to supply the elastic yarn by a clamp cutter when starting the supply of the elastic yarn. The core yarn manufacturing apparatus according to claim 4, wherein control is performed so that feeding of the elastic yarn by the feeding roller is started substantially simultaneously with release of the grip. 6. The air spinning device includes a hollow guide shaft, and a nozzle member for generating a swirling air flow at a distal end of the hollow guide shaft. The core yarn producing apparatus according to any one of claims 1 to 5, wherein a swirling air flow by a nozzle is applied while supplying the yarn and the fiber bundle to generate a core yarn.