JP2001159035A - Yarn suction apparatus for spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn suction apparatus for a spinning machine, not causing looseness of yarn, capable of preventing the occurrence of kinky thread, having tensile force of yarn not lowering with time due to no abrasion as a rubber roller of a conventional yarn suction apparatus and simplifying maintenance. SOLUTION: An air sucker member 17 for supplementally drawing a yarn y which is sucked and caught by a suction pipe 13 is installed in a yarn suction apparatus in a spinning machine equipped with the suction pipe for sucking and catching the yarn discharged from a yarn outlet of a spinning part 2 and transporting the yarn to a fixed position in piecing or doffing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn suction device in a spinning machine for sucking and catching a yarn and guiding it to a predetermined position during splicing and doffing of the spinning machine.

[0002]

2. Description of the Related Art Conventionally, at the time of a splicing operation or a doffing operation, a yarn spun by a spinning section is supplied to a suction pipe having a suction port arranged at a yarn discharge port of the spinning section. By using the suction pipe and rotating the suction pipe downward, the suction-captured yarn can be arranged at a predetermined position near the splicing member, or the full package can be replaced with an empty bobbin. In a yarn suction device of a spinning machine arranged at a predetermined position in the vicinity of a doffing member to be performed, in order to compensate for a lack of suction force of a suction pipe, a rotating rubber is attached to a yarn sucked and captured by the suction pipe. There is known a yarn suction device in which a roller is brought into contact (for example, Japanese Patent Application Laid-Open No. 5-86516).

[0003]

As in the yarn suction device of a conventional spinning machine, the yarn sucked and captured by the suction pipe is merely brought into contact with the rotating rubber roller to be bent by a yarn guide or the like. However, there is a problem that the thread is not enough to pull out the thread, and the thread is slackened and the thread is twisted. In particular, with the increase in the spinning speed, the occurrence of twisting due to slackening of the yarn has become a problem. It is a problem.

[0004] Further, since the rubber roller is easily worn, especially in the case of a thick count, the abrasion is so severe that the pulling force of the rubber roller is reduced, and the rubber roller is liable to be slid. And other maintenance is required.

An object of the present invention is to solve the problems of the yarn suction device in the conventional spinning machine described above.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention firstly suctions and catches a yarn discharged from a yarn discharge port of a spinning section at the time of splicing or doffing. A yarn suction device for a spinning machine having a suction pipe for transferring the yarn to a predetermined position, wherein an air sucker member for assisting and pulling the yarn sucked and captured by the suction pipe is provided. No. 2 allows the flow velocity of the compressed air jetted from the air jet holes of the air football member into the yarn passage cylinder to be adjustable.
In this configuration, a non-circling airflow is generated in a yarn passage cylinder of an air sucker member used at the time of piecing.

[0007]

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 using the yarn suction device of the present invention and a piecing step will be outlined with reference to FIGS. The yarn suction device in the spinning machine of the present invention will be described later, and FIGS. 1 and 2 only show a suction pipe constituting the yarn suction device.

Reference numeral 1 denotes a four-wire draft section comprising a back roller 1a, a third roller 1b, a second roller 1c on which an apron 1c 'is stretched, and a front roller 1d. , A spinning unit that generates a yarn using a swirling airflow. Numeral 3 is a yarn feeder for nipping the yarn y between the nip roller 3a and the delivery roller 3b and feeding it downward, 4 is a yarn guide, and 5 is a slack tube which is always in a suction state. , 6 are yarn clearers. Reference numeral 7 denotes a pair of fixed guide rollers 7a and 7b and a movable guide roller 7c disposed between the fixed guide rollers 7a and 7b and urged away from the fixed guide rollers 7a and 7b. A known tension adjusting member. Reference numeral 8 denotes a package formed by winding a yarn y around a bobbin 10 held by a cradle arm 9, and the package 8 is configured to be rotated by contacting a friction roller 11. ing. The draft unit 1, the spinning unit 2, the yarn feeding unit 3, the slack tube 5, the yarn clearer 6, the tension adjusting member 7, the cradle arm 9, and the like constitute a spinning unit U.

Numeral 12 is a piecing member such as a knotter and a splicer disposed in each of the spinning units U of the working cart and the spinning machine traveling along the spinning machine. The suction port 13 is turned upward during the piecing operation, and is positioned at the tip end.
a is a suction pipe as a spinning unit side suction member that is disposed near the yarn discharge port of the spinning unit 2 and sucks the spun yarn. Further, 14 is entangled in the package 8 when the yarn breaks. The suction mouth serves as a take-up side suction member that sucks the drawn yarn end, performs the yarn drawing, and suction-holds the yarn drawn from the package 8. Similarly to the splicing member 12, the suction pipe 13 and the suction mouth 14 are also provided with a work cart or each spinning unit U of the spinning machine that travels along the spinning machine in order to reliably introduce the sucked yarn into the splicing member 12. It is arranged in. By providing the piecing member 12, the suction pipe 13, and the suction mouth 14 on the work vehicle running along the spinning machine, it is not necessary to provide the piecing member 12 for each spinning unit U, and the structure is simple.

After being drafted in the drafting section 1, the fiber bundle 15 enters the spinning section 2 and is twisted by the swirling airflow generated in the spinning section 2 to generate a yarn y. 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. Next, the slack tube 5 is guided by the yarn guide 4.
Is passed through the front of the suction port 5a and is passed through the yarn clearer 6. Next, it is wound on the package 8 which is in contact with the friction roller 11 and is rotating.

When the yarn clearer 6 detects a defect such as a slab of the yarn y, the yarn y is cut by a cutter provided on the yarn clearer 6 or a cutter provided immediately downstream of the yarn feeding section 3. At the same time, the cut yarn y on the spinning unit 2 side is sucked into the slack tube 5 or a suction duct different from the slack tube 5. The cut yarn y on the package 8 side is wound around the package 8. In addition, the rotation of the back roller 1a and the third roller 1b is stopped, and the fiber bundle 1 is moved between the third roller 1b and the second roller 1c that is continuing to rotate.
5, and the fiber bundle 15 on the second roller 1c side is
The yarn is sent by the second roller 1c and the front roller 1d continuing to rotate, and is generated into the yarn y by the operating spinning unit 2, and the generated yarn y is a slack tube 5 or a suction different from the slack tube 5. It is sucked and removed by the duct.

In splicing, the friction roller 1
In package 8, which has been separated from 1 and has stopped rotating,
As shown by a two-dot chain line in FIG. 2, the suction port located at the tip of the suction mouse 14 is brought close to suck the yarn end wound around the package 8, and thereafter, shown by a solid line in FIG. As described above, by rotating the suction mouth 14 upward, the yarn end y1 on the package 8 side is
It is arranged near the piecing member 12.

Further, the stopped back roller 1a and third roller 1b are operated, and the fiber bundle 15 is drafted by the second roller 1c and the front roller 1d which are continuing to rotate, and sent to the spinning unit 2. Then, the spinning is restarted to generate the yarn y. The yarn end of the generated and continuously spun yarn y is located near the yarn discharge port of the spinning unit 2 as shown by a two-dot chain line in FIG.
The suction pipe 3a is sucked and captured by the suction pipe 13 where the suction pipe 3a is disposed, and then, as shown by a solid line in FIG.
Is arranged on the side of the nip roller 3 a of the yarn feeding section 3 and is arranged near the yarn joining member 12. At this time, the suction port 5a of the slack tube 5 is closed.

The yarn end y1 on the package 8 side arranged near the splicing member 12 and the yarn end y2 on the spinning unit 2 arranged near the splicing member 12 are the same as the yarn The rotation of the shift lever is introduced into the piecing portion of the piecing member 12 and spliced. Immediately before the yarn joining operation and immediately before the yarn joining operation (rotation of the knotter head), the suction port 5a of the slack tube 5 is opened, and the slack of the yarn generated during the yarn joining operation is sucked and stored in the slack tube 5 in a loop shape. It has become. Further, by the rotation of the yarn pulling lever of the yarn pulling member, the yarn on the spinning unit 2 side is sandwiched between the nip roller 3a and the delivery roller 3b and sent downward.
The spliced yarn y is applied to the friction roller 1
1 and is wound on the package 8 which has resumed rotation, and is also stored in the slack tube 5.
Is pulled out when the rotation of the package 8 is resumed, and returns to a normal spinning state.

Next, details of the yarn suction device, the yarn joining member 12, and the like will be described with reference to FIGS.

The piecing member 12 has a piecing portion 12a such as a known knotter or splicer.
An upper thread guide portion 12b and a lower thread guide portion 12c are disposed vertically above and below the 2a. Upper thread guide 1
2b has a guide plate 12b2 in which a recess 12b1 having a larger width is formed toward the tip, and a branch plate 12b3 attached to the guide plate 12b2 so as to bisect the recess 12b1. Similarly, the lower thread guide portion 12c also has a wider concave portion 12c1 as it goes to the tip.
The guide plate 12c2 in which the
It has a branch plate 12c3 attached to the guide plate 12c2 so as to bisect c1.

Reference numeral 16 denotes the above-described yarn pulling member. The yarn pulling member 16 has a vertical shaft 16a and a pair of yarn pulling levers 16b attached to upper and lower ends of the vertical shaft 16a. The shift lever 16b is moved by a suitable driving means as shown in FIGS.
And from the standby position separated from the lower thread guide portion 12c,
It is configured to be able to rotate in the direction of the upper yarn guide portion 12b and the lower yarn guide portion 12c so as to be at the yarn shift position shown in FIG.

Reference numeral 17 denotes an air sucker member which constitutes the yarn suction device S of the present invention together with the above-described suction pipe 13. The air sucker member 17 is provided for suctioning the yarn sucked by the suction pipe 13 without fail. Similarly to the pipe 13, it is fixed to a predetermined position of a work cart traveling along the spinning machine or a spinning unit U of the spinning machine. The air soccer member 17 includes a yarn passage cylinder 17a.
And an air soccer body 17c having a vertical hole 17b into which the thread passage cylinder 17a is fitted. An air reservoir 17d is formed between the thread passage cylinder 17a and the air soccer body 17c. ing. An air reservoir 17d communicates with an air passage 17e formed in the air soccer main body 17c, and a pipe 17f connected to a compressed air supply source (not shown) is connected to the air passage 17e.

The yarn passage cylinder 1 located in the air reservoir 17d
A suitable number of air ejection holes 17g extending downward along the axial direction of the yarn passage cylinder 17a are formed in the circumferential direction of the yarn passage cylinder 17a.
The compressed air ejected from 7 g into the yarn passage cylinder 17 a is
Without forming a swirling airflow, the direct current flows straight toward the suction port 13a of the suction pipe 13 rotated to the lowest position. The air soccer body 17c
Is formed with a guide recess 17h which communicates with the vertical hole 17b and expands toward the outside.
Is formed in the yarn passage cylinder 17a.

Air soccer member 1 having the above configuration
7 is a step of arranging the yarn y spun by the spinning section 2 by suction and arranging the yarn y suctioned and captured by the suction pipe 13 rotated downward in the vicinity of the piecing member 12. The y is guided by the guide recess 17h of the air soccer member 17 and is attached to a position where it is introduced into the yarn passage cylinder 17a through the slit 17i of the guide recess 17h.

At the time of the piecing operation, as described above, the yarn end y1 sucked into the slit-shaped suction port 14a of the suction mouth 14 rotated near the piecing member 12,
Branch plate 1 of concave portion 12b1 of upper thread guide portion 12b
It is located in one concave part partitioned by 2b3 and one concave part partitioned by the branch plate 12c3 of the concave part 12c1 of the lower thread guide part 12c. Similarly, the yarn end y2 sucked and captured by the suction pipe 13 rotated near the yarn splicing member 12 is in the other concave portion and the lower yarn guide partitioned by the branch plate 12b3 of the concave portion 12b1 of the upper yarn guide portion 12b. The concave portion 12c of the portion 12c
The air sucker member 17 is located in the other concave portion partitioned by the first branch plate 12c3.
Of the guide recess 17h.
h, and is introduced into the yarn passage cylindrical body 17a through the slit 17i. The yarn introduced into the yarn passage cylinder 17a is generated in the suction pipe 1
The suction pipe 13 is pulled by the airflow flowing straight toward the suction port 13a of the third and the suction force of the suction pipe 13. Therefore, the yarn y spun by the spinning unit 2
Is pulled by both the suction force of the air sucker member 17 and the suction force of the suction pipe 13, so that the yarn y does not become slack and the occurrence of sway can be prevented.

After the yarn end y2 on the spinning unit side sucked and captured by the suction pipe 13 and the yarn end y1 on the winding side sucked by the suction mouth 14 are arranged as described above, the yarn Thread shift lever 16b of member 16
Is moved from a standby position separated from the upper thread guide portion 12b and the lower thread guide portion 12c as shown in FIGS. 3 and 6, and as shown in FIG.
2b and 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 connected to the yarn joining portion 12a by the upper yarn guide portion 12b and the lower yarn guide portion 12c. To be spliced. In addition, by rotating the yarn pulling lever 16b of the yarn pulling member 16 in the directions of the upper yarn guide 12b and the lower yarn guide 12c, as described above, the yarn puller 16 is disposed on the side of the nip roller 3a of the yarn feeder 3. The thread y thus moved is moved in the direction of the contact portion between the nip roller 3a and the delivery roller 3b, is nipped by the nip roller 3a and the delivery roller 3b, and is sent downward.

As described above, at the time of the splicing operation, the yarn on the spinning section side which is sucked and captured by the suction pipe 13 which has been rotated downward is drawn into the suction port 13 a of the suction pipe 13.
Introduced into the air sucker member 17 in which the air flow flowing straight in the direction is generated, the suction pipe 1
3 and the air soccer member 17 cooperate with each other to increase the pulling force of the yarn, so that it is possible to reliably prevent the yarn from becoming loose and causing a twist. In addition, since the air soccer member 17 is provided, there is no abrasion unlike the rubber roller of the conventional yarn suction device, so that the pulling force of the yarn does not decrease with time and maintenance is also improved. It's easy. Furthermore, since the air sucker member 17 is fixedly provided at a predetermined position separately from the suction pipe 13, the amount of air sucked from the tip is small as in the case where the air sucker member 17 is provided at the tip of the suction pipe 13. Therefore, there is no problem that the yarn discharged from the spinning unit 2 cannot be captured.

As described above, the yarn passage cylinder 17a
The airflow flowing inside the yarn passage cylinder 1 is not changed to a swirling airflow.
The non-swirl airflow directed downward along the axial direction of 7a is such that when the swirling airflow flowing in the yarn passage cylinder 17a turns in the direction opposite to the twist of the yarn, the twist of the yarn is released. The yarn is twisted and cuts, and when the swirling airflow swirls in the twisting direction of the yarn, the yarn is twisted and twisting torque remains in the spliced portion and the twisting torque remains. Undesirably occurs.

Next, a case where the above-described yarn suction device S including the suction pipe 13 and the air sucker member 17 is used at the time of doffing will be described with reference to FIGS. In this case, similarly to the case of the yarn splicing, the yarn suction device S can be provided for each work carriage or each spinning unit U.

Reference numeral 18 denotes a thread locking member having a thread locking claw 18a attached to an appropriate frame located outside the cradle arm 9, and 19 is a thread locking member in the standby position.
A thread transfer member that is located above the air soccer member 17 and that can move outward from the standby position beyond the thread locking claw 18a in the horizontal direction during operation. Reference numeral 20 denotes a thread hooking member. The thread hooking member 20 moves the cradle arm 9 from a standby position in a substantially vertical state around a horizontal shaft 20a.
A rotary lever 20b which is mounted in the direction of the thread locking board 21 having the notch 21a, and a cylinder 20c which is mounted on the tip of the rotary lever 20b;
Bobbin 1 attached to piston rod 20c '
Threading piece 20d that can move back and forth in the direction perpendicular to the 0 axis
And a guide piece 20e protruding from an upper end of the threading piece 20d, and a thread locking notch 20d 'is formed at a lower end edge of the threading piece 20d.

As in the case of the above-described splicing operation, during the doffing operation, the yarn y discharged from the spinning unit 2 that has resumed spinning is placed near the yarn discharge port of the spinning unit 2 at its suction port. 13a
The suction pipe 13 that has been suction-captured by the suction pipe 13 in which the yarn y is discharged from the spinning unit 2 is turned downward, and as shown in FIG. The package is removed and placed on the upper outside of the cradle arm 9 holding the empty bobbin 10.

Next, the thread transfer member 19 is horizontally rotated from the standby position shown in FIG. 8 toward the thread locking member 18 as shown in FIG. ,
The yarn y, which is stretched between the air sucker member 17 and the yarn sucking device S, is locked by the yarn transfer member 19 to the yarn locking claw 18a of the yarn locking member 18, and thereafter, the yarn is transferred. The member 19 returns to the original standby position. In this state,
As shown in FIG. 10, the thread y is
Between the thread locking claw 18a and the air sucker member 17 constituting the thread suction device S.

Next, the turning lever 20 of the thread hooking member 20
b is rotated in the direction of the thread locking board 21 so that the thread locking member 18 is rotated.
The thread y stretched between the thread locking claw 18a and the air sucker member 17 is inserted into the thread locking notch 20 of the thread hooking piece 20d.
d '. Thereafter, the cylinder 20c is operated to advance the piston rod 20c ', and the thread hook 2
0d is advanced in the direction of the empty bobbin 10, and as shown in FIG.
The thread y engaged with the notch 21
a, the yarn y on the tension adjusting member 7 side is wound around the empty bobbin 10, and the yarn y extending from the notch 21a toward the air sucker member 17 constituting the yarn suction device S is cut. Then, it is sucked and removed by the suction pipe 13.

Then, after a bunch is formed around the empty bobbin 10 and a bunch is formed, the cylinder 20c of the thread hooking member 20 is operated to retreat the piston rod 20c ', to retract the thread hooking piece 20d, and to rotate. The lever 20b is pivoted upward to return to the standby position shown in FIG. Thereafter, the yarn y engages with a reciprocating traverse guide (not shown) to resume traverse, and the empty bobbin 10
Will be wound.

Also during the doffing operation described above, the yarn y spun by the spinning unit 2 is introduced into the air sucker member 17 constituting the yarn suction device S by the rotation of the suction pipe 13, and the air sucker member 17 and suction pipe 13
Since the yarn y is pulled by both of the suction forces, the yarn y is not slackened, and the occurrence of stiffness can be prevented.

In the air sucker member 17 used in the doffing operation, the air flow generated in the yarn passage cylinder 17a is not necessarily limited to the air sucker member 17 used in the above-described yarn joining operation. As shown in FIGS. 12 and 13 without being limited to the non-swirl airflow as described above,
The air ejection holes 17g may be formed in the tangential direction of the inner peripheral surface of the yarn passage cylinder 17a. In the case of doffing work,
Since there is a distance from the air soccer member 17 to a position where the yarn y is hooked on the notch 21a of the yarn locking board 21, even if the yarn y is slightly untwisted or twisted, substantially There is no problem. By using the swirling airflow as the airflow, the pulling force of the yarn by the air sucker member 17 can be increased.

The yarn sucking device S has a yarn passage cylinder 17a through an air ejection hole 17g of the air sucker member 17.
The flow rate of the compressed air ejected into the inside is configured to be adjustable. When the yarn y to be spun is a thick yarn having a high twisting torque, the yarn that is ejected from the air ejection hole 17g into the yarn passage cylinder 17a to increase the flow velocity of the compressed air, and is sucked and captured by the suction pipe. , The tension of the thread y is strengthened, the slack of the yarn y is surely removed, and the occurrence of the twist is suppressed. Conversely, if the yarn y has a fine count, the yarn is broken if the flow velocity of the compressed air is ejected from the air ejection hole 17g into the yarn passage cylinder 17a and the tensile force of the yarn is too strong. Therefore, in such a case, the flow velocity of the compressed air ejected from the air ejection hole 17g into the yarn passage cylinder 17a is reduced.

[0035]

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

Since the air sucker member for assisting and pulling the yarn sucked and captured by the suction pipe is provided, the yarn does not become slack, and it is possible to prevent the occurrence of stiffness and the conventional method. Unlike the rubber roller of the yarn suction device, it does not wear, so that the pulling force of the yarn does not decrease with time and maintenance is simplified.

Since the flow velocity of the compressed air ejected from the air ejection hole of the air sucker member into the yarn passage cylinder can be adjusted, an appropriate yarn pulling force can be obtained according to the yarn count and the like.

Since a non-swirling airflow is generated in the yarn passage cylinder of the air sucker member used at the time of splicing, the yarn is untwisted by the swirling airflow to cut the yarn. It is possible to prevent the yarn from being twisted and the twisting torque from remaining at the spliced portion, thereby preventing the yarn from being twisted.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a spinning machine or the like as an example in which a yarn suction device in a spinning machine of the present invention is applied to a piecing operation.

FIG. 2 is a schematic side view of a spinning machine or the like as an example in which the yarn suction device in the spinning machine of the present invention is also applied to a piecing operation.

FIG. 3 is a partial perspective view of a yarn suction device and the like when the yarn suction device in the spinning machine of the present invention is applied to a piecing operation.

FIG. 4 is a perspective view of an air sucker member constituting the yarn suction device in the spinning machine of the present invention.

FIG. 5 is a vertical sectional view taken along line II of FIG. 4;

FIG. 6 is a partial perspective view of a yarn suction device and the like when the yarn suction device in the spinning machine of the present invention is applied to a yarn splicing operation.

FIG. 7 is a partial perspective view of a yarn suction device and the like when the yarn suction device in the spinning machine according to the present invention is applied to a piecing operation.

FIG. 8 is a partial perspective view of a yarn suction device and the like when the yarn suction device in the spinning machine of the present invention is applied to a doffing operation.

FIG. 9 is a partial perspective view of the yarn suction device and the like when the yarn suction device in the spinning machine of the present invention is applied to doffing work.

FIG. 10 is a partial perspective view of the yarn suction device and the like when the yarn suction device in the spinning machine of the present invention is applied to doffing work.

FIG. 11 is a partial perspective view of the yarn suction device and the like when the yarn suction device in the spinning machine of the present invention is applied to doffing work.

FIG. 12 is a horizontal sectional view of an air sucker member constituting a yarn suction device in the spinning machine of the present invention applied to doffing work.

FIG. 13 is a vertical sectional view of an air sucker member constituting a yarn suction device in the spinning machine of the present invention applied to doffing work.

[Explanation of symbols]

S: Thread suction device 1: Draft unit 2: Spinning unit 3: Thread feed unit 8 ... package 12 ... splicing member 13 ... suction pipe (spinning unit side suction member) 14 ... Suction mouth (winding side suction member) 16 .............. Thread pulling member 17 ......... Air soccer member

Claims (3)

[Claims] 1. A yarn suction device for a spinning machine having a suction pipe for sucking and catching a yarn discharged from a yarn discharge port of a spinning unit at the time of piecing or doffing, and transferring the yarn to a predetermined position. A yarn suction device for a spinning machine, comprising an air sucker member for assisting and pulling a yarn sucked and captured by a pipe. 2. The yarn suction device for a spinning machine according to claim 1, wherein the flow velocity of the compressed air injected into the yarn passage cylinder from the air injection hole of the air sucker member is adjustable. 3. The spinning machine according to claim 1, wherein a non-swirl airflow is generated in the yarn passage cylinder of the air sucker member used at the time of piecing. Thread suction device.