JP2001159039A - Piecing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly thread a yarn sucked to a sucking member in a spinning part into a nip roller and a delivery roller composing a yarn feeding part and reduce piecing errors. SOLUTION: This piecing device is equipped with a threading member 21 for guiding the yarn Y sucked to the sucking member 13 in the spinning part from a free end 3a' of the nip roller 3a in the yarn feeding part to the vicinity to the center thereof in the piecing device of a spinning machine having a draft part 1, the spinning part 2 forming the yarn, the yarn feeding part 3, and taking-up parts 8, 9, 10 and 11 when ordered from the upstream side of the yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piecing apparatus for a spinning machine having a draft section, a spinning section for producing a yarn, a yarn feeding section, and the like.

[0002]

2. Description of the Related Art Conventionally, at the time of piecing, a suction mouth as a take-up side suction member sucks a yarn end wound on a package, takes out the yarn, and rotates the suction mouth upward. As a result, the yarn end on the winding side is arranged near a splicing member such as a knotter or a splicer, and the yarn which is resumed from the spinning and is sent out from the spinning section is sucked into a suction pipe as a spinning-side suction member. At the same time, the suction pipe is rotated downward so that the suction pipe is disposed in the vicinity of the splicing member, and then the yarn pulling lever of the yarn pulling member is rotated in the direction of the splicing member to spin the yarn end on the winding side with the spinning. There is known a piecing apparatus that introduces a yarn end of a section into a piecing member and performs piecing.

[0003]

In the above-described conventional piecing apparatus, the yarn on the spinning section side sucked by the suction pipe is arranged near the piecing member by turning the suction pipe downward. At this time, when the tension of the yarn downstream of the spinning unit is low, there is a problem that the yarn insertion between the nip roller and the delivery roller fails, and a yarn splicing error occurs.

An object of the present invention is to solve the problems of the above-described conventional piecing apparatus.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention firstly comprises, in order from the upstream side, a draft part, a spinning for producing a yarn, a yarn feeding part, and a winding part. In a yarn splicing device of a spinning machine, a yarn insertion member that guides a yarn sucked by a spinning unit side suction member from a free end of a nip roller of a yarn feeding unit toward a center is provided. A yarn pulling member that moves the yarn sucked by the spinning unit side suction member in the axial direction of the nip roller toward the normal yarn traveling path direction,
Thirdly, the yarn pulling member is a yarn pulling member for introducing the yarn end on the spinning section side and the yarn end on the winding side into the yarn joining section of the yarn joining member.

[0006]

Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments unless it departs from the gist of the present invention.

First, a spinning unit U constituting a spinning machine to which the piecing apparatus of the present invention is applied will be outlined with reference to FIG.

[0008] Reference numeral 1 denotes a 4-wire draft section as an example, which comprises a back roller 1a, a third roller 1b, a second roller 1c on which an apron 1c 'is stretched, and a front roller 1d. It is a spinning unit that generates yarns by utilizing. 3 is a nip roller 3a
And a delivery roller 3b for holding the thread Y and sending it downward. Reference numeral 4 denotes a suction member including a cutter 4a and a suction pipe 4b which is always in a suction state. 5 is a thread guide, 6 is a slack tube which is always in a suction state, and 7 is a yarn clearer. Reference numeral 8 denotes a package in which a yarn Y is wound around a bobbin 10 held by a cradle arm 9, which constitutes a winding unit. The package 8 is configured to be rotated by contacting a friction roller 11. Have been. The nip roller 3a is supported in a cantilever manner.

[0009] P is a work carriage P running along the spinning machine.
The work carriage P is provided with a piecing member 12, which will be described later. In addition, during the piecing operation, the piecing device sucks the yarn discharged from the spinning unit 2 where the spinning has been resumed, and performs the piecing operation. Member 1
A suction pipe 13 is provided as a spinning unit side suction member for transferring the yarn to the vicinity of 2. The suction pipe 13 further sucks the yarn caught in the package 8 and performs yarn feeding.
A suction mouth 14 is provided as a take-up side suction member for transferring the yarn pulled out from the package 8 to a position near the yarn joining member 12.

[0010] After being drafted in the drafting section 1, the fiber bundle S enters the spinning section 2 and is formed into a yarn Y by the swirling airflow generated in the spinning section 2. Thereafter, the sheet is nipped by a nip roller 3a and a delivery roller 3b constituting the yarn feeding section 3 and is sent downward. Thereafter, the yarn Y is always in the suction state while being guided by the yarn guide 5 via the suction member 4 having the suction pipe 4b which is always in the suction state, having the suction port below the traveling path of the yarn Y. The slack tube 6 passes through the front of the suction port 6 a and is inserted into the yarn clearer 7. Next, it is wound on the package 8 which is in contact with the friction roller 11 and is rotating.

When the yarn clearer 7 detects a defect such as a slab of the yarn Y, the cutter 4a of the suction member 4 disposed downstream of the yarn feeding section 3 is operated to cut the yarn Y. At the same time, the cut yarn Y is sucked into the suction pipe 4b of the suction member 4. The yarn Y downstream from the cutting position is
It is wound around the package 8. In addition, back roller 1
a and the third roller 1b are stopped from rotating, and the third roller 1b and the second roller 1 continuing to rotate are stopped.
c, the fiber bundle S is cut, and the fiber bundle S on the side of the second roller 1c is rotated.
c and the spinning unit 2 which is sent by the front roller 1d, and operates only for a predetermined time after the stop of the back roller 1a.
The yarn Y is generated by the suction member 4
Is sucked and removed by the suction pipe 4b.

At the time of piecing, the friction roller 1
2 is separated from the package 1 and stops rotating.
As indicated by the two-dot chain line in FIG.
4, the suction mouth of the suction mouth 14 is sucked while the package 8 is reversed by a package reversing means (not shown).
Is turned upward, the yarn end Y1 on the winding side is rotated.
Is arranged near the piecing portion 12. Further, the suction pipe 13 at the standby position is rotated upward, and the back roller 1a and the third roller 1b, which are stopped, are stopped in a state where the suction port 13a is arranged to face the yarn discharge side of the spinning unit 2. And the spinning unit 2 is operated,
The second roller 1c that continues rotating the fiber bundle S
In addition to drafting by the front roller 1d and sending to the spinning unit 2, spinning is resumed to generate a yarn Y. As shown by a two-dot chain line in FIG. 2, the yarn end of the generated yarn Y is sucked into a suction pipe 13 having a suction port 13a disposed on the yarn discharge side of the spinning unit 2, and thereafter, suction is performed. By rotating the pipe 13 downward, the yarn Y is transferred to the nip roller 3a and the delivery roller 3a.
b, and the yarn end Y2 is disposed near the piecing portion 12. At this time, suction pipe 1
The suction port 13a of No. 3 is shifted to one side in the width direction (the right side in this example) from the yarn path in the normal spinning state, and the sucked yarn Y is inclined diagonally toward one side when viewed from the front. It is in an inclined state.

Next, by turning a yarn pulling lever of a yarn pulling member, which will be described later, in the direction of the yarn splicing member 12, the yarn Y on the spinning unit side is centered in the width direction of the spinning unit U (when viewed from the front, It is moved toward the yarn running path in the normal spinning state) and is sandwiched between the nip roller 3a and the delivery roller 3b. Then, the yarn Y on the spinning unit side is fed to the nip roller 3a and the delivery roller 3b.
Between the auxiliary nozzle 1 in the spinning unit 2 to be described later.
After stopping the injection of the compressed air from 6p and returning to the real twist spinning, the piecing is performed. The spliced yarn Y comes into contact with the friction roller 11 and is taken up by the package 8 whose rotation has been resumed, and is stored in the slack tube 6 during the splicing operation by the splicing member 12 (during rotation of the notter head). The yarn Y that has been used up is exhausted when the rotation of the package 8 is restarted, and the spinning state becomes a normal spinning state.

Next, a spinning section 2 having a spinning nozzle section 15 and a non-rotating hollow guide shaft 16 will be described as an example of the spinning section with reference to FIG.

The spinning nozzle section 15 has a guide hole 15a for introducing the fiber bundle S drafted by the draft section 1, and a needle holder having a needle 15b mounted on a flow path of the fiber bundle S discharged from the guide hole 15a. 15c, and located downstream of the needle holder 15c.
Frusto-conical tip 1 of hollow guide shaft 16 in a non-rotating state
6a is provided at a predetermined interval, and has a swirling airflow generating unit 15d that generates a swirling airflow near the distal end 16a of the hollow guide shaft 16.

The swirling airflow generating section 15d is formed in a cylindrical shape, and is configured to be assembled concentrically with the needle holder 15c. The swirling airflow generating section 15d has a fiber bundle S sent from the needle holder 15c.
A spinning chamber 15e for applying a swirling airflow to the spinneret is formed, and a front end portion 1 of a hollow guide shaft 16 is provided in the spinning chamber 15e.
6a is accommodated coaxially.

A swirling nozzle 15 for generating a swirling airflow in the spinning chamber 15e is provided in the swirling airflow generating unit 15d.
A plurality of f's are formed. The swirling nozzle 15f is formed as a thin hole communicating with the spinning chamber 15e, and is provided on the tangent to the spinning chamber 15e so that air flows along the inner circumference of the swirling airflow generation unit 15d. , Are formed to be inclined downstream in the feed direction of the fiber bundle S. A compressed air supply member 15h in which an air passage 15g is formed is arranged in the spinning nozzle portion 15 so as to surround the swirl nozzle 15f, and the compressed air supply member 15h is connected to a compressed air source (not shown) via a pipe. It is connected to an air supply.

The hollow guide shaft 16 is connected to the spinning nozzle 15
The needle holder 15c is fitted into a through hole 15k formed in a wall 15j opposite to the wall 15i on the front roller 6 side to which the front roller 6 is attached, and an opening 16b formed in the tip thereof is directed toward the needle 15b. It is configured to be arranged. Further, the yarn passage 16c formed on the axis of the hollow guide shaft body 16 is formed so as to be divergent toward the yarn outlet 16d, and specifically, the yarn passage 16c is formed through the opening 16b. A small-diameter introduction portion 16e extending a predetermined length toward 16d, a first enlarged-diameter portion 16f that is enlarged stepwise downstream from the introduction portion 16e, and a smooth downstream portion of the first enlarged-diameter portion 16f. A second enlarged diameter portion 16g which is connected to the second enlarged diameter portion 16g and a third enlarged diameter portion 16h which is enlarged stepwise downstream of the second enlarged diameter portion 16g. At the end of the third enlarged diameter portion 16h, the above-described yarn discharge port 1 is provided.
6d are formed. The shape of the yarn passage 16c is not limited to the above-described embodiment, but may be a mere stepped shape without the tapered enlarged portion.
The downstream side of the first enlarged diameter portion 16f may be shaped so that the tapered enlarged diameter portion continues to the yarn discharge port.

Frusto-conical tip 1 of hollow guide shaft 16
6a and the outer diameter of the hollow guide shaft 16 located between the large diameter portion 16i near the yarn discharge port 16d is formed as a small diameter portion 16j, and the hollow guide shaft 16 is surrounded by the small diameter portion 16j. Is attached. An air passage 16n is formed between the small diameter portion 16j and the outer cylinder 16k so as to surround the small diameter portion 16j.

The small diameter portion 16j of the hollow guide shaft 16 has
A plurality of auxiliary nozzles 16p provided tangentially to the yarn passage 16c are formed. In the present embodiment, a swirling airflow is generated in a direction opposite to the swirling airflow formed by the swirl nozzle 15f described above. Is configured.

Reference numeral 17 denotes a through hole 16 formed in the outer cylinder 16k.
r is a connecting member having a pipe portion 17a fitted to
The connecting member 17 is connected to a pipe 18 connected to a compressed air supply source (not shown).

When compressed air is supplied to the air passage 16n of the hollow guide shaft 16 via a pipe 18 and a connecting member 17 connected to a compressed air supply source (not shown), the compressed air passes through the auxiliary nozzle 16p. Through the thread passage 16
c, and is discharged from the yarn discharge port 16d.
In this way, by supplying the compressed air from the auxiliary nozzle 16p, the yarn is fed into the yarn passage 16c of the hollow guide shaft 16
It is configured to form an air flow from the opening 16b formed at the tip to the yarn discharge port 16d.

Next, an outline of the process of forming the yarn Y by the spinning unit U of the spinning machine having the above-described configuration will be described.

The fiber bundle S supplied to the draft device 1 is
After being drafted by the draft device 1, the guide hole 1 of the needle holder 15c generated by the action of the compressed air injected from the swirling nozzle 15f of the swirling airflow generating unit 15d.
By the suction air flow near 5a, the air enters the guide hole 15a,
After that, it is sent along the circumference of the needle 15b and
Enter 5e.

The fibers constituting the fiber bundle S sucked into the spinning chamber 15e are subjected to the action of the swirling airflow which is jetted from the swirling nozzle 15f and is swirling at high speed near the distal end 16a of the hollow guide shaft body 16. The fiber is twisted in the direction of the swirling airflow while being separated from the fiber bundle S. Further, a part of the twist applied by the swirling airflow tends to propagate in the direction of the front roller 6, but the propagation is prevented by the needle 15b, so that the fiber bundle S sent out from the front roller 6 has the twist. Is not twisted. Most of the twisted fibers as described above are successively formed into real twisted yarns (real twisted yarns) Y which are mostly wrapped fibers, pass through the yarn passage 16c of the hollow guide shaft 16, and pass through the yarn outlet 16d.
Is discharged from In such a normal yarn Y production process, compressed air is not supplied to the air passage 16n of the hollow guide shaft 16 from the compressed air supply source via the pipe 18 and the connecting member 17, and therefore, Auxiliary nozzle 16
From p, no compressed air is supplied into the yarn passage 16c.

In the normal spinning state, the yarns Y sequentially formed on the real twisted yarn Y, passing through the yarn passage 16c of the hollow guide shaft 16 and coming out of the yarn discharge port 16d are fed to the nip roller 3a constituting the yarn feeding portion 3. And delivered by the delivery roller 3b and sent to the package 8 direction.
While being traversed by a traverse guide (not shown), the traverse guide abuts the friction roller 11 and is wound up on the rotating package 8.

Next, a splicing operation for starting the spinning machine and a splicing operation when a yarn break occurs will be described.

Before the spinning machine is started or when the yarn breaks, a part of the draft roller (in this case, the back roller 3 and the third roller 4) is stopped.
No compressed air is injected from the swirl nozzle 15f and the auxiliary nozzle 16p, and the swirl nozzle 15f and the auxiliary nozzle 1
6p is inactive. Fiber bundle S whose tip is gripped by the stopped third roller 4
Is supplied by rotating the back roller 3 and the third roller 4, and is supplied to the spinning unit 2 via the second roller 5 and the front roller 6. With the start of driving of the stopped draft roller, the injection of compressed air from the swirling nozzle 15f and the auxiliary nozzle 16p is started. That is, at the time of resuming the spinning for performing the piecing operation, in the spinning unit 2, the compressed air is injected from the swirling nozzle 15f, and the hollow guide shaft 1 is supplied from the compressed air supply source via the pipe 18 and the connecting member 17.
6, the compressed air is supplied to the air passage 16n, and therefore the compressed air is also injected into the yarn passage 16c from the auxiliary nozzle 16p.

The swirling nozzle 15f is formed to be inclined downstream in the feed direction of the fiber bundle S, and the compressed air injected from the swirl nozzle 15f flows in the feed direction of the fiber bundle S while swirling. Guide hole 1 of holder 15c
The fiber bundle S introduced into 5 a is sent to the vicinity of the opening 16 b formed at the tip of the hollow guide shaft 16 via the needle 15 b while being made into a loose false twist state by the swirling airflow.

The compressed air injected from the auxiliary nozzle 16p is supplied to the yarn passage 1 formed in the hollow guide shaft 16
It flows along the inner peripheral surface in 6c to form a swirling airflow. And, as described above, the yarn passage 16c is
d, the compressed air injected into the yarn passage 16c through the auxiliary nozzle 16p flows to the yarn discharge port 16d side, and has a small diameter introduction portion 16e.
Becomes negative pressure. For this reason, air flows in the suction direction (the direction toward the inside of the hollow guide shaft 16) in the opening 16 b formed at the tip of the hollow guide shaft 16. Thereby, the fiber bundle S can be continuously drawn into the yarn passage 16 c of the hollow guide shaft 16.

As described above, the fiber bundle S in the false twist state sent to the vicinity of the opening 16b formed at the tip of the hollow guide shaft 16 is subjected to the suction flow from the opening 16b.
6b is drawn into the yarn passage 16c. And the fiber bundle S
Reaches the first enlarged diameter portion 16f through the small-diameter introduction portion 16e, and is exposed to the swirling airflow in the spinning nozzle portion 15 in the direction opposite to the swirling airflow formed by the swirling nozzle 15f. For this reason, the loosely twisted fiber bundle 1 is spun into a bundled fibrous yarn (bundled yarn) by the bundled spinning technology of generating yarns by swirling airflows in opposite directions.
The hollow guide shaft 16 is discharged from the yarn discharge port 16d.
Such a spinning state of the bundled fibrous yarn by the swirling nozzle 15f and the auxiliary nozzle 16p is referred to as a yarn feeding spinning. In the present example, in the spinning nozzle section 15, a needle 15b is provided on the flow path of the fiber bundle S, and the rotating nozzle 15f
Propagation of the false twist imparted to the fiber by the auxiliary nozzle 16p is transmitted between the needle 15 and the front roller 1d.
As a result, the strength of the binding yarn by the yarn spinning is low, and the tension of the binding yarn downstream of the yarn discharge port 16d of the hollow guide shaft 16 is low.

On the other hand, the tying yarn discharged from the yarn discharge port 16d of the hollow guide shaft 16 as described above is driven by driving the stopped work carriage P which has been moved to the spinning unit requiring piecing and stopped. To the yarn discharge port 1 of the hollow guide shaft 16.
Suction port 1 of suction pipe 13 arranged near 6d
The suction is performed by the suction pipe 3a, and the suction pipe 13 is transferred to the vicinity of the piecing member 12 by the downward rotation.
Thereafter, when the yarn sucked by the suction pipe 13 is sandwiched between the nip roller 3a and the delivery roller 3b, the supply of compressed air from the compressed air supply source to the auxiliary nozzle 16p is stopped, and the auxiliary nozzle 16p The injection of the compressed air into the yarn passage 16c is stopped. This allows
The swirling airflow in the hollow guide shaft body 16 disappears, and the above-mentioned yarn spinning of the binding yarn by the swirling airflows in opposite directions ends, and the normal spinning state of the yarn Y, that is, the spinning nozzle unit 15
Of the yarn feeder 3 by the swirling airflow from the swirling nozzle 15f
As a result, the spun yarn is spun while the yarn Y is pulled out.

When the yarn Y sucked from the suction pipe 13 of the work cart P is spliced by the splicing member 12,
All the binding yarns are sucked into the suction pipe 13 and the real twists are spliced together. In parallel with the above-mentioned operation by the suction pipe 13, the suction mouth 14 of the work cart P is rotated in the direction of the package 8, and the yarn caught in the package 8 is sucked by the suction mouth 14. Is rotated upward, and the yarn end on the winding side is arranged near the piecing member 12. Then, the yarn end Y2 on the spinning section side
After the take-up side yarn end Y1 is disposed in the vicinity of the yarn splicing member 12, once the yarn pulling lever of the yarn pulling member described later is rotated in the direction of the yarn splicing member 12, and the yarn at the spinning unit side is rotated. The end Y2 is moved in the axial direction of the nip roller 3a toward the normal yarn traveling path, and is moved under the nip roller 3a. Thereafter, the compressed air from the auxiliary nozzle 16p is stopped, and when all the binding yarns are sucked and removed by the suction pipe 13, the yarn pulling lever of the yarn pulling member is operated again to wind the yarn with the yarn end Y2 on the spinning unit side. Yarn end Y1 on the picking side
Are introduced into the piecing member 12, and the piecing member 12 is driven to connect both yarns, thereby completing the piecing operation. The suction port of the slack tube 6 is normally closed, and the suction port is opened when the driving of the piecing member 12 (rotation of the knotter head) is started. Thereby, the slack of the yarn during the driving of the splicing member 12 (during the rotation of the knotter head) is reduced by the slack tube 6.
Is designed to be sucked.

As shown in FIG. 4, the piecing member 1
Reference numeral 2 has a thread knot portion 12a formed of a known knotter or the like, and an upper thread guide portion 12b and a lower thread guide portion 12c are disposed above and below the thread knot portion 12a. The upper thread guide portion 12b has a guide plate 12b2 in which a concave portion 12b1 having a larger width is formed toward the tip.
And the guide plate 1 so as to bisect the concave portion 12b1.
2b2 and a branch plate 12b3 attached thereto. Similarly, the lower the thread guide portion 12c is, the more it goes to the tip.
It has a guide plate 12c2 in which a wide recess 12c1 is formed, and a branch plate 12c3 attached to the guide plate 12c2 so as to bisect the recess 12c1.

Reference numeral 19 denotes the above-described yarn pulling member. The yarn pulling member 19 has a vertical shaft 19a and a pair of yarn pulling levers 19b attached to upper and lower ends of the vertical shaft 19a. The shift lever 19b is moved from a standby position separated from the upper thread guide portion 12b and the lower thread guide portion 12c as shown in FIG. 4 by an appropriate driving means, as shown in FIG. It is configured to be able to rotate in the direction of the yarn guide portion 12b and the lower yarn guide portion 12c.

Next, a description will be given of a thread insertion member for inserting a thread between the nip roller 3a and the delivery roller 3b, which constitutes the thread feed member 3, and between the nip roller 3a and the delivery roller 3b. Reference numeral 20 denotes a thread slide plate disposed immediately downstream of the thread feed member 3, and a free end 3a 'of the nip roller 3a is provided at an upper end thereof.
, A downwardly inclined surface 20a is formed up to a position beyond the free end 3a 'of the nip roller 3a. When the suction pipe 13 that has sucked the yarn discharged from the spinning unit 2 is rotated in the direction of the piecing member 12, the yarn is turned on the inclined surface 20 of the yarn slide plate 20.
a, and moves along the inclined surface 20a toward the free end 3a 'of the nip roller 3a, passes over the free end 3a', and is mounted on the delivery roller 3b. Have been. Since such a thread slide plate 20 is provided, the thread is placed on the nip roller 3a on the upstream side of the nip roller 3a despite the fact that the thread is guided toward the center by a thread insertion member 21 described later. It can be prevented from being left. When the yarn is sandwiched between the nip roller 3a and the delivery roller 3b, the yarn is located below the lower end 20b of the yarn slide plate 20 and is configured not to contact the yarn slide plate 20. ing.

The reference numeral 21 designates a means disposed immediately upstream of the yarn feeding member 3 for promoting insertion of the yarn between the nip roller 3a and the delivery roller 3b constituting the yarn feeding member 3. It is a thread storage plate. Yarn storage plate 2
1, a suction pipe 1 that sucks a yarn spun from a spinning unit 2 through a suction port 13a disposed on the yarn discharge side.
3 is rotated downward to arrange the yarn Y in the vicinity of the piecing portion 12, and the yarn Y is moved to the free end 3a 'of the nip roller 3a.
From the nip roller 3a and the delivery roller 3b, so that the thread introduced between the nip roller 3a and the delivery roller 3b does not contact the thread receiving plate 21. A relief recess 21b is formed below. The thread holder plate 21 is mounted on a suitable frame of the spinning machine, not shown.

As described above, during the piecing operation, the yarn end Y2 sucked by the suction pipe 13 rotated near the piecing member 12, as shown in FIG.
The branch plate 12c3 which is in contact with the inclined surface 21a of the thread storage plate 21 and which is partitioned by the branch plate 12b3 of the concave portion 12b1 of the upper thread guide portion 12b and the concave portion 12c1 of the lower thread guide portion 12c.
Are located in one of the concave portions. Similarly, the suction mouth 1 rotated near the piecing member 12
The yarn end Y1 sucked by the upper yarn guide 4 is connected to the upper yarn guide portion 12b.
In the other concave portion and the concave portion 1c of the lower thread guide portion 12c, which are partitioned by the branch plate 12b3 of the concave portion 12b1.
It is located in the other concave portion partitioned by the branch plate 12c3 of 2c1.

After the yarn end Y2 on the spinning section side and the yarn end Y1 on the winding side are arranged as described above, the yarn pulling member 19 is moved to the upper yarn guide as shown in FIG. Part 1
2b and the standby position separated from the lower yarn guide portion 12c, as shown in FIG.
When rotated in the direction of the lower yarn guide portion 12c, the yarn end Y2 on the spinning portion side and the yarn end Y1 on the winding side are respectively rotated by the upper yarn guide portion 12b and the lower yarn guide portion 12c. When viewed from the front substantially on the center line in the width direction, the yarn tying portion 1 is guided in the normal yarn traveling path direction.
2a. The yarn Y on the spinning unit side guided toward the center by the upper yarn guide portion 12b and the lower yarn guide portion 12c comes into contact with the above-described inclined surface 21a of the yarn insertion plate 21, and the force for shifting toward the center is reduced. Because of the action, the yarn pulling lever 19a is rotated in the direction of the yarn knot portion 12a, so that the yarn is reliably inserted and nipped between the nip roller 3a and the delivery roller 3b.
As described above, the yarn sucked by the suction pipe 13 is supplied to the yarn storage plate 21 on the upstream side of the nip roller 3a.
Is guided to the center in the width direction along the inclined surface 21a, and is moved toward the center in the width direction by the yarn pulling member 19 on the downstream side of the nip roller 3a. Even when the yarn tension on the (downstream side) is low, the yarn can be reliably inserted into the nip roller 3a.

Particularly, in a spinning machine having a spinning section 2 of the type shown in FIG. 3, since the tension of the yarn spun during the above-mentioned yarn spinning is small, the nip roller 3a and the delivery Although the thread insertion to the roller 3b failed in some cases, as described above, the thread insertion plate 21 as a thread insertion member provided a success rate of thread insertion to the nip roller 3a and the delivery roller 3b. Is improved.

In the above-described embodiment, the yarn end member Y1 for introducing the yarn end Y1 on the winding side and the yarn end Y2 on the spinning unit side to the yarn joining portion 12a, and the yarn In cooperation with the storage plate 21, the suction pipe 13
An example is shown in which the yarn being sucked is inserted between the nip roller 3a and the delivery roller 3b.
That is, when the yarn is inserted into the nip roller 3a, the yarn pulling member that brings the yarn closer to the center and applies tension to the yarn is provided downstream of the nip roller 3a.
Immediately before the driving of No. 2, an example is shown in which the yarn end member Y1 on the winding side and the yarn end Y2 on the spinning unit are also used as the yarn pulling member 19 for introducing the yarn into the yarn joining portion 12a. In addition to the yarn pulling member 19 for introducing the yarn into the yarn joining portion 12a, a yarn pulling member that shifts the yarn toward the center can be provided.

[0042]

Since the present invention has the above-described structure, the following effects can be obtained.

The yarn sucked by the spinning unit side suction member is
Yarn can be reliably inserted into the nip roller and the delivery roller that constitute the yarn feeding section, and therefore, tying errors can be reduced.

Since the yarn is guided to the center before and after the nip roller in combination with the yarn pulling member, the yarn sucked by the spinning unit side suction member is sent to the nip roller and the delivery roller constituting the yarn feeding unit. The thread can be inserted more reliably.

Since the yarn pulling member is also used as the yarn pulling member of the yarn splicing member, there is no need to provide a special yarn pulling member for inserting the yarn into the nip roller. Can be driven at a predetermined timing, so that the structure of the piecing device can be simplified, the failure of the piecing device is reduced, and maintenance becomes easy.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a piecing apparatus according to the present invention and a spinning machine as an example to which the piecing apparatus is applied.

FIG. 2 is a schematic side view of a piecing apparatus according to the present invention and a spinning machine as an example to which the piecing apparatus is applied.

FIG. 3 is a vertical sectional view of a spinning unit as an example of a spinning machine to which the piecing apparatus of the present invention is applied.

FIG. 4 is a perspective view of a main part of a piecing apparatus according to the present invention and a spinning machine as an example to which the piecing apparatus is applied.

FIG. 5 is a perspective view of a main part of the piecing apparatus of the present invention and a spinning machine as an example to which the piecing apparatus is applied.

FIG. 6 is an enlarged perspective view of a main part of a piecing apparatus according to the present invention and a spinning machine as an example to which the piecing apparatus is applied.

[Explanation of symbols]

1 ... Draft section 2 ... Spinning section 3 ... Thread feed section 8 ... Package 12 ·········································································· Suction mouth (with / within take-up side) ..... Threading members

Claims (3)

[Claims] 1. A yarn splicing device for a spinning machine having a draft section, a yarn producing section, a yarn feed section, and a winding section in order from the upstream side, wherein the yarn sucked by the spinning section side suction member is converted into a yarn. A yarn splicing device provided with a yarn insertion member for guiding a free end of a nip roller of a feed portion toward a center. 2. The yarn sucked by the spinning section side suction member,
The yarn splicing device according to claim 1, further comprising a yarn pulling member that moves in the axial direction of the nip roller toward a normal yarn traveling path. 3. A yarn pulling member for introducing a yarn end on a spinning section side and a yarn end on a winding side into a yarn splicing section of a yarn splicing member. The piecing device according to claim 1 or 2.