JP4251154B2 - Core yarn production equipment - Google Patents

Description

  The present invention relates to a double-line draft device for drafting a sheath fiber of a core yarn, an elastic yarn supply device for supplying an elastic yarn serving as a core fiber of the core yarn, and the elastic yarn from the elastic yarn supply device toward the draft device. The present invention relates to a core yarn manufacturing apparatus, comprising: a guide pipe for guiding the elastic yarn; and an air soccer ball for flying the elastic yarn from the guide pipe toward the draft device.

2. Description of the Related Art Conventionally, there is known an apparatus for manufacturing a core yarn by covering a sheath fiber with a spinning device around an elastic yarn (Patent Document 1).
In such a core yarn manufacturing apparatus, a double-line draft apparatus that drafts the sheath fiber of the core yarn, an elastic thread supply apparatus that supplies elastic yarn that becomes the core fiber of the core yarn, and the draft apparatus from the elastic thread supply apparatus to the draft apparatus. A guide pipe that guides the elastic yarn toward the head, and an air soccer that blows the elastic yarn from the guide pipe toward the draft device.

Here, the feeding direction of the sheath fiber in the draft device is an inclined direction from the rear upper side to the front lower side with respect to the front surface of the machine base, and the draft rollers are arranged along the feeding direction. In the draft device, the pair of rollers positioned at the foremost side is a front top roller and a front bottom roller.
Further, an elastic yarn supply device is disposed above the draft device, and the elastic yarn supplied from the elastic yarn supply device is drafted in the draft device via a guide pipe disposed above the draft device. It is inserted into the inside of the sheath fiber that is fed out.

In the core yarn manufacturing apparatus as described above, the insertion position of the elastic yarn guided by the guide pipe into the draft device is, for example, between the front top roller and the second top roller, and the peripheral surfaces of these two rollers are The elastic yarn is inserted into the sheath fiber that has been drafted by the draft device.
Moreover, the cylindrical pipe was used for the guide pipe.
JP 2002-363831 A

However, in the core yarn manufacturing apparatus as described above, there is a limit to the success rate of yarn insertion, that is, the success rate of insertion of elastic yarn into the sheath fiber drafted by the draft device. This is because the guide pipe for insertion has a cylindrical shape, and the behavior of the air ejected from the guide pipe at the time of yarn insertion is not stable, and the insertion position of the core fiber delivered through the guide pipe may be displaced. .
That is, the problem to be solved is to improve the success rate of yarn insertion in a core yarn manufacturing apparatus that manufactures a core yarn using core fibers as elastic yarns.

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

That is, in claim 1,
A double-line draft device for drafting the sheath fiber of the core yarn;
An elastic yarn supply device for supplying an elastic yarn as a core fiber of the core yarn;
A guide pipe for determining the entry position of the elastic yarn into the draft device;
An air soccer ball that blows the elastic yarn from the guide pipe toward the entry position;
A core yarn manufacturing apparatus comprising:
The outlet shape of the guide pipe is a shape that is long in the feeding direction of the sheath fiber in the draft device.

In claim 2,
The entry position is provided on an outer peripheral surface of a front top roller provided in the draft device,
The layout of the guide pipe with respect to the draft device is set so that the approximate axial center position of the front top roller is located on the extended line of the elastic thread entry path from the guide pipe outlet to the entry position. , That is.

In claim 3,
The outlet shape of the guide pipe is an elliptical shape.

  As effects of the present invention, the following effects can be obtained.

In claim 1,
The behavior of the yarn inserted into the sheath fiber is stabilized, and the success rate of inserting the elastic yarn into the sheath fiber is improved.

In claim 2, in addition to the effect of claim 1,
The air discharged from the guide pipe minimizes the influence of the sheath fiber in the draft device and improves the success rate of inserting the elastic yarn into the sheath fiber.

In claim 3, in addition to the effect of claim 1 or claim 2,
The behavior of the yarn inserted into the sheath fiber is stabilized, and the success rate of inserting the elastic yarn into the sheath fiber is improved.

  A core yarn manufacturing apparatus 1 according to an embodiment of the present invention will be described with reference to the drawings. The core yarn manufacturing apparatus 1 is an apparatus that manufactures a core yarn configured by using an elastic yarn as a core fiber and covering the core fiber with a sheath fiber.

  As shown in FIG. 1, the core yarn manufacturing apparatus 1 includes a draft device 100 that drafts a sheath fiber 2 of a core yarn, an elastic yarn supply device 200 that supplies an elastic yarn 3 that becomes a core fiber, and an elastic yarn 3 inserted therein. And a pneumatic spinning device 300 that forms a core yarn 4 by spinning a sheath fiber. The core yarn manufacturing apparatus 1 is also provided with a winding device (not shown) for winding the manufactured core yarn 4.

  For convenience of explanation, the entire apparatus related to the manufacture of a single core yarn is referred to as the core yarn manufacturing apparatus 1, but the apparatus related to the manufacture of a single core yarn is referred to as a core yarn manufacturing unit, and a plurality of core yarn manufacturing units are combined. May be referred to as a core yarn manufacturing apparatus.

In FIG. 1, the base front side of the core yarn manufacturing apparatus 1 is the left side, and the right side is the back side of the base. Further, the vertical direction in FIG. 1 coincides with the vertical direction of the core yarn production apparatus 1, and the paper surface direction in FIG. 1 coincides with the horizontal direction of the core yarn production apparatus 1.
In the present specification, the front / rear (front / rear), upper / lower, left / right of the core yarn manufacturing apparatus 1 are defined as described above.

The draft device 100 will be described with reference to FIG.
The draft device 100 is a device arranged in front of the pneumatic spinning device 300 in the delivery direction of the sheath fiber 2, and drafts the sheath fiber 2 supplied to the pneumatic spinning device 300. The drafting device 100 and the pneumatic spinning device 300 constitute a pneumatic spinning device.
The draft device 100 is a double-line draft device, and includes a plurality of pairs of draft rollers (four in this embodiment) sandwiching the sheath fibers 2, and the peripheral speed difference between the draft rollers before and after the sheath fibers 2 in the feeding direction. Is provided to stretch (draft) the sheath fiber 2.

The four pairs of draft rollers are a front roller pair 110, a second roller pair 120, a third roller pair 130, and a back roller pair 140 in the order closer to the pneumatic spinning device 300 in the feeding direction of the sheath fiber 2.
These draft roller pairs are arranged rearward and upward from the pneumatic spinning device 300 with respect to the front of the machine base. The sheath fiber 2 is sent and drawn so as to pass through the back roller pair 140, the third roller pair 130, the third roller pair 130, and the front roller pair 110 in this order. That is, the delivery direction of the sheath fiber 2 is a direction from the rear upper side to the front lower side.

Each draft roller pair includes a top roller and a bottom roller that face each other with the sheath fiber 2 interposed therebetween.
The front roller pair 110 includes a front top roller 111 and a front bottom roller 112. The second roller pair 120 includes a second top roller 121 and a second bottom roller 122. The third roller pair 130 includes a third top roller 131 and a third bottom roller 132. The back roller pair 140 includes a back top roller 141 and a back bottom roller 142.
An apron belt 125 is wound around the outer periphery of the second top roller 121, and an apron belt 126 is wound around the outer periphery of the second bottom roller 122, and the sheath fiber 2 faces between the apron belts 125 and 126. It is pinched by contact.

The elastic yarn supply device 200 will be described with reference to FIG.
The elastic yarn supply device 200 is a device that supports the elastic yarn package 203 and unwinds the elastic yarn 3 from the elastic yarn package 203. Each device (such as a cradle 221 described later) constituting the elastic yarn supply device 200 is supported by the base frame 210.
. The elastic yarn package 203 is a package formed by winding the elastic yarn 3 on a bobbin.
The elastic yarn supply device 200 includes a cradle 221 that supports the elastic yarn package 203, a package driving drum 222 that rotates in conjunction with the elastic yarn package 203, and a package driving motor 223 that is a driving source of the package driving drum 222. It has been.

The cradle 221 is an arm that is swingably provided by a rotation support shaft 224 at the rear upper end of the base frame 10, and includes a bobbin holder 221 a that can hold and release the bobbin of the elastic yarn package 203.
A package driving drum 222 is disposed in front of and below the rotation support shaft 224. When the cradle 221 is tilted forward, the elastic yarn package 203 supported by the cradle 221 is in contact with the package driving drum 222. Has been.
Further, a package drive motor 223 is disposed behind the package drive drum 222, and power is transmitted from the package drive motor 223 to the package drive drum 222 by the belt 225.

  Between the elastic yarn supplying device 200 and the draft device 100, along the elastic yarn feeding path, there are a yarn feeler 5, an air soccer 6, a clamp cutter 7, a nozzle pipe 8, a funnel-shaped guide 9, and a guide pipe 10. Has been placed.

  The yarn feeler 5 is a device that detects the presence or absence of elastic yarn from the elastic yarn supply device 200 to the draft device 100.

  The clamp cutter 7 is a device that simultaneously includes a cutter that is a cutting means for elastic yarn and a clamp that is a means for gripping the cut elastic yarn. This clamp cutter 7 cuts the elastic yarn 3 and holds (clamps) the yarn end when the yarn of the core yarn 4 is spliced, or releases the holding so that the elastic yarn 3 can be sent out. Is possible.

  The air soccer 6 is configured to include a suction part 6a that sucks air and a discharge part 6b that discharges air by driving an external air supply means (compressor or the like). The air soccer 6 is capable of sucking and capturing the elastic yarn 3 into the air soccer 6 and skipping the elastic yarn 3 from the guide pipe 10 by the discharge pressure from the air soccer 6.

  When the air soccer 6 is driven in a state where the holding (clamping) of the elastic yarn 3 by the clamp cutter 7 is released, the elastic yarn 3 in the clamp cutter 7 is discharged from the nozzle pipe by the discharge pressure from the discharge portion 6b. 8, it passes through the funnel-shaped guide 9 and the guide pipe 10 and enters the outer peripheral surface 111 a of the front top roller 111 of the draft device 100.

Here, the delivery path of the elastic yarn 3 in the clamp cutter 7 is kept airtight, and the clamp cutter 7 and the nozzle pipe 8 are also connected in communication so as to keep airtightness. The nozzle pipe 8 and the guide pipe 10 downstream in the yarn feeding direction are connected by a funnel-shaped guide 9. The funnel-shaped guide 9 has an inlet whose inner diameter is wider than the outer diameter of the nozzle pipe 8 and is open to the outside, but the outlet is formed so that the inner diameter matches the outer diameter of the guide pipe 10. Airtightness is maintained.
With the above configuration, when the air soccer 6 is activated, a feeding force is applied to the elastic yarn 3 between the clamp cutter 7 and the nozzle pipe 8 by the jet air from the discharge portion 6b. It enters the draft device 100 (on the outer peripheral surface 111a of the front top roller 111). At the same time, part of the air is released by the funnel-shaped guide 9 and the air discharge pressure from the guide pipe 10 is reduced. The sheath fiber 2 fed through the draft device 100 is prevented from being adversely affected by air from the guide pipe 10.

The thread insertion of the elastic yarn 3 into the sheath fiber 2 will be described with reference to FIGS.
When the production of the core yarn is interrupted or resumed, such as when piecing, the elastic yarn 3 held by the clamp cutter 7 is newly inserted into the sheath fiber 2 drafted in the draft device 100 Is done. This is a thread insertion of the elastic yarn 3 into the sheath fiber 2.
At this time, the air soccer 6 is driven, and the elastic yarn 3 held by the clamp cutter 7 is blown out from the guide pipe 10 to enter the outer peripheral surface 111 a of the front top roller 111. A position where the yarn end of the elastic yarn 3 comes into contact with the outer peripheral surface 111a is defined as an entry position P.
The elastic yarn 3 that has entered the outer peripheral surface 111a is fed between the front top roller 111 and the front bottom roller 112 as the front top roller 111 rotates, and the elastic yarn 3 is inserted into the sheath fiber 2. Is done.

  As described above, by providing the entry position P of the elastic yarn 3 on the outer peripheral surface 111 a of the front top roller 111, the air discharged from the guide pipe 10 by driving the air soccer 6 is sheathed in the draft device 100. There is no direct contact with the fiber 2. That is, it is difficult for the sheath fiber 2 to be adversely affected by the discharge air from the guide pipe 10.

The success rate of the yarn insertion depends on the followability of the elastic yarn 3 that has entered the front top roller 111.
That is, when the yarn end of the elastic yarn 3 after contacting (after entering) the outer peripheral surface 111a is attached without leaving the outer peripheral surface 111a, the elastic yarn 3 follows the rotating front top roller 111. Then, it is fed as it is between the front top roller 111 and the front bottom roller 112. That is, the yarn insertion is successful. On the other hand, if the yarn end of the elastic yarn 3 after contacting (after entering) the outer peripheral surface 111a is separated from the outer peripheral surface 111a, the elastic yarn 3 is inserted into the sheath fiber 2 at an inappropriate position. Or come off without entering the sheath fiber 2. That is, the yarn insertion is likely to fail.

  Therefore, in order to improve the success rate of the yarn insertion, the entry path C of the elastic yarn 3 to the front top roller 111 and the entry position P where the elastic yarn 3 contacts the outer peripheral surface 111a of the front top roller 111 for the first time are as follows. It is set like this.

Since the guide pipe 10 in the present embodiment is a straight cylindrical member, the guide path of the elastic yarn 3 formed in the guide pipe 10 is straight. If the guide path in the guide pipe 10 is a straight line, the entry path C on the extension line of the guide path is also a straight line.
Here, the entry path C of the elastic yarn 3 into the front top roller 111 is determined by the shape of the outlet side portion of the guide pipe 10. For this reason, even if there is a bent portion in the middle of the guide pipe 10, the entry path C is also straight if at least the outlet side portion of the guide pipe 10 is formed in a straight line.

The entry path C is formed on the normal line of the outer peripheral surface 111a of the front top roller 111, and the entry position P, which is the end position of the entry path C, is the intersection point between the normal line and the outer peripheral surface 111a. It has become. That is, the axial center Mr of the front top roller 111 is located on the extended line of the entry path C.
The layout of the guide pipe 10 with respect to the draft device 100, that is, the arrangement position of the guide pipe 10 and the direction (arrangement attitude) of the guide pipe 10 are set so that the entry path C is formed.

The elastic yarn 3 is blown from the guide pipe 10 toward the axial center Mr (in the normal direction) by driving the air soccer 6, and reaches the entry position P on the outer peripheral surface 111 a of the front top roller 111.
As described above, when the elastic yarn 3 is allowed to enter the outer peripheral surface 111a from the normal direction, the yarn end of the elastic yarn 3 is more likely to enter the outer periphery than in the case where the elastic yarn 3 is allowed to enter from the other direction (the direction not passing through the axis Mr). It is hard to slip with respect to the surface 111a and easily follows the rotating front top roller 111. That is, the success rate of inserting the elastic yarn 3 into the sheath fiber 2 is improved.

This is because the magnitude of the impact received by the yarn end of the elastic yarn 3 at the time of contact (during entry) changes depending on the direction in which the elastic yarn 3 enters the outer peripheral surface 111a. This is due to the change in the degree of unraveling. When the fiber at the yarn end of the elastic yarn 3 is loosened, the yarn end of the elastic yarn 3 tends to adhere to the outer peripheral surface 111a without coming off at the time of contact (when entering).
Here, when the elastic yarn 3 is allowed to enter the outer peripheral surface 111a from the normal direction, the yarn end of the elastic yarn 3 is more than the outer peripheral surface compared to the case where the elastic yarn 3 is allowed to enter from the other direction (the direction not passing through the axis Mr). It contacts the entire surface of 111a without slipping, and the impact received upon contact (when entering) is large, and the yarn end of the elastic yarn 3 is easily loosened. For this reason, when the elastic yarn 3 is allowed to enter the outer peripheral surface 111a from the normal direction, the success rate of the yarn insertion is improved.

  As shown in FIGS. 2 and 3, the separation distance between the outlet 10 a of the guide pipe 10 and the entry position P (the path length of the entry path C) is preferably set to about 2 to 8 mm.

  In addition, the direction (arrangement posture) of the guide pipe 10 which is a straight cylindrical member is oriented in the vertical direction, and the guide path of the elastic yarn 3 in the guide pipe 10 and the entry path C are also in the vertical direction. It is in line with. Then, the elastic yarn 3 blown from the guide pipe 10 by the driving of the air soccer 6 enters the entry position P on the outer peripheral surface 111a of the front top roller 111 from directly above.

Next, the shape of the outlet 10a of the guide pipe 10 will be described with reference to FIGS.
Since the elastic yarn 3 is configured to be delivered by the discharge pressure of the air soccer 6, the shape of the outlet 10 a of the guide pipe 10 affects the direction in which the elastic yarn 3 enters the outer peripheral surface 111 a of the front top roller 111. It has become.
Therefore, the shape of the outlet 10a of the guide pipe 10 is formed such that the entry direction does not deviate in the axial direction of the front top roller 111 with respect to the entry position P.

  As shown in FIG. 4, the outlet 10 a of the guide pipe 10 has an elliptical shape, and the major axis direction of this ellipse is the direction along the delivery direction Ds of the sheath fiber 2 in the draft device 100.

  Therefore, the air discharged from the outlet 10a of the guide pipe 10 is diffused in the delivery direction Ds with respect to the central axis Mp of the guide pipe 10, but the axial direction of the front top roller 111 (axial center Mr direction). Then it is not spread. Therefore, the entry direction of the elastic yarn 3 does not shift in the axial direction (axial center Mr direction) of the front top roller 111 due to the diffusion of the air discharged from the outlet 10a of the guide pipe 10.

If the entry direction of the elastic yarn 3 is shifted in the axial center Mr direction, the insertion position of the elastic yarn 3 into the sheath fiber 2 is shifted from the center to the right and left in the width direction instead of the center in the width direction of the sheath fiber 2. The position of the elastic yarn 3 or the insertion of the elastic yarn 3 into the sheath fiber 2 itself may fail. That is, the thread insertion of the elastic yarn 3 into the sheath fiber 2 is reduced.
In the case of the guide pipe 10 having the above-described configuration, there is no possibility of the elastic yarn 3 entering in the direction of the axial center Mr. Therefore, there is no such failure.

The core yarn manufacturing apparatus of this invention is put together.
A core yarn manufacturing apparatus according to a first aspect of the present invention includes a double-line draft device that drafts a sheath fiber of a core yarn, an elastic yarn supply device that supplies an elastic yarn that becomes a core fiber of the core yarn, and the elastic yarn that is supplied to the draft device. A guide pipe that determines a rush position; and an air soccer ball that blows the elastic yarn from the guide pipe toward the rush position.
The outlet shape of the guide pipe is a shape that is long in the feeding direction of the sheath fiber in the draft device.

The core yarn manufacturing apparatus 1 according to the present embodiment includes a four-wire draft device 100, an elastic yarn supply device 200, and a pneumatic spinning device 300. The spinning apparatus is not limited to the pneumatic type.
Between the draft device 100 and the elastic yarn supply device 200, along the delivery path of the elastic yarn 3, the yarn feeler 5, the air soccer 6, the clamp cutter 7, the nozzle pipe 8, the funnel-shaped guide 9, the guide pipe 10, Is arranged.

In the present embodiment, the shape of the outlet 10 a of the guide pipe 10 is an ellipse, and the major axis direction of the ellipse is the direction along the delivery direction Ds of the sheath fiber 2 in the draft device 100.
The outlet shape of the guide pipe is not limited to the elliptical shape of the present embodiment, but is elongated in one direction such as a rhombus, a long hole (a shape in which a corner is rounded in a rectangle), an isosceles triangle, etc. Therefore, the opening may be a straight line that is short in a direction perpendicular to the one direction. And the guide pipe in which the opening which becomes long in such one direction was formed should just be arranged to the draft device so that the longitudinal direction of the opening may be the direction along the sending direction Ds of the sheath fiber 2. .

With the above configuration, the air discharged from the outlet of the guide pipe is diffused in the sheath fiber delivery direction with respect to the central axis of the guide pipe outlet side portion, but is not diffused in the axial direction of the front top roller.
For this reason, the behavior of the yarn inserted into the sheath fiber is stabilized, and the success rate of inserting the elastic yarn into the sheath fiber is improved.

The core yarn manufacturing apparatus according to the second invention is the following structure in the first invention.
A double-line draft device for drafting the sheath fiber of the core yarn, an elastic yarn supply device for supplying an elastic yarn to be the core fiber of the core yarn, a guide pipe for determining the entry position of the elastic yarn into the draft device, and the guide An air soccer ball that blows the elastic yarn from the inside of the pipe toward the entry position.
The entry position is provided on an outer peripheral surface of a front top roller provided in the draft device.
The layout of the guide pipe with respect to the draft device is set so that the substantially axial position of the front top roller is positioned on the extended line of the elastic thread entry path from the guide pipe outlet to the entry position. Yes.

The core yarn manufacturing apparatus 1 according to the present embodiment includes a four-wire draft device 100, an elastic yarn supply device 200, and a pneumatic spinning device 300. The spinning apparatus is not limited to the pneumatic type.
Between the draft device 100 and the elastic yarn supply device 200, along the delivery path of the elastic yarn 3, the yarn feeler 5, the air soccer 6, the clamp cutter 7, the nozzle pipe 8, the funnel-shaped guide 9, the guide pipe 10, Is arranged.

The entry position P of the elastic yarn 3 into the draft device 100 is on the outer peripheral surface of the front top roller 111 located closest to the pneumatic spinning device 300 among the four-wire draft rollers provided in the draft device 100. Is provided.
Further, on the extended line of the entry path C of the elastic yarn 3 from the exit 10a of the guide pipe 10 to the entry position P, the substantially axial center position of the front top roller is located. The layout (arrangement position and orientation) of the guide pipe 10 with respect to the draft device 100 is set so as to have such a positional relationship.

With the above configuration, the air discharged from the guide pipe does not directly hit the sheath fiber in the draft device. Further, the thread end of the elastic thread that enters is less likely to slip with respect to the outer peripheral surface of the front top roller, and easily follows the rotating front top roller.
For this reason, the influence which the sheath fiber in a draft apparatus receives by the air discharged from a guide pipe is minimized, and the success rate of the thread insertion into the sheath fiber of an elastic thread improves.

A core yarn manufacturing apparatus according to a third aspect of the present invention is the following structure according to the first or second aspect of the present invention.
The outlet shape of the guide pipe is an elliptical shape.

  For this reason, the behavior of the yarn inserted into the sheath fiber is stabilized, and the success rate of inserting the elastic yarn into the sheath fiber is improved.

It is a side view which shows the principal part of a core yarn manufacturing apparatus. It is a side view of the front top roller periphery part which shows the penetration path | route to the front top roller of an elastic yarn. It is a front view of the front top roller periphery part which shows the penetration path | route to the front top roller of an elastic yarn. It is a plane sectional view showing the exit shape of a guide pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Core yarn manufacturing apparatus 2 Sheath fiber 3 Elastic yarn 4 Core yarn 6 Air soccer | ball 10 Guide pipe 10a Outlet 100 Draft apparatus 111 Front top roller 111a Outer surface 200 Elastic thread supply apparatus C Entry path | route Ds Delivery direction Mr Axle P Entry position

Claims (3)

A double-line draft device for drafting the sheath fiber of the core yarn;
An elastic yarn supply device for supplying an elastic yarn as a core fiber of the core yarn;
A guide pipe for determining the entry position of the elastic yarn into the draft device;
An air soccer ball that blows the elastic yarn from the guide pipe toward the entry position;
A core yarn manufacturing apparatus comprising:
The outlet shape of the guide pipe is a shape that is long in the feeding direction of the sheath fiber in the draft device,
A core yarn manufacturing apparatus characterized by that. The entry position is provided on an outer peripheral surface of a front top roller provided in the draft device,
The layout of the guide pipe with respect to the draft device is set so that the approximate axial center position of the front top roller is located on the extended line of the elastic thread entry path from the guide pipe outlet to the entry position. ,
The core yarn manufacturing apparatus according to claim 1. The outlet shape of the guide pipe is an ellipse,
The core yarn manufacturing apparatus according to claim 1 or 2, characterized in that

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