JP2003278035A - Method for spinning and apparatus therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for spinning with which production of yarns in yarn pick-up spinning can surely be carried out and the percentage of success in ending is resultantly improved. <P>SOLUTION: The method for spinning is carried out as follows. A fed sliver 1 is drafted at a prescribed draft ratio and a yarn is produced using a turning air stream of a nozzle member in a usual spinning state with a spinning member composed of a nozzle member 17 having a nozzle hole 16d and a hollow guide shaft body 19. Compressed air is jetted from an auxiliary nozzle 19e formed in the hollow guide shaft body 19 in addition to the turning air stream during ending operation to produce suction force from an opening 19h formed at the tip of the hollow guide shaft body 19 toward a yarn discharge port 19g to thereby carry out the yarn pick-up spinning. In the method for spinning, the draft ratio during the yarn pick-up spinning is changed from that in the usual spinning state. After completing the yarn pick-up spinning, the changed draft ratio is returned to the draft ratio in the usual spinning state. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning method and apparatus for producing a spun yarn by twisting a bundle of fibers drafted by a drafting device by applying a swirling airflow.

[0002]

2. Description of the Related Art Conventionally, a yarn called a seed yarn or a parent yarn is
The nozzle member of the spinning member and the hollow guide shaft are simply supplied to the spinning member by simply supplying the fiber bundle drafted to the spinning member without passing through the spinning member including the nozzle member and the hollow guide shaft that generate the swirling airflow. A yarn is generated by an auxiliary nozzle formed in the body to perform yarn discharge (yarn discharge spinning described below), and then the yarn generated by the spinning member and the yarn connected to the winding package are combined by a yarn splicing device. There is known a spinning method and an apparatus thereof which are spun to restart spinning at the start of spinning or after yarn breakage occurs (Japanese Patent Laid-Open No. 2001-40532).

[0003]

SUMMARY OF THE INVENTION In the above-described conventional spinning method and apparatus, in order to make the above-mentioned yarn discharge spinning, that is, the restart of spinning after yarn breakage, more reliable,
That is, it is necessary to sufficiently and more reliably act the air currents from the nozzle member and the auxiliary nozzles on the fiber bundle during yarn discharge spinning. Therefore, the spinning speed at the spinning operation at the spinning restarting operation or the spinning start at the start of spinning of the spinning device is set in consideration of the above points, and therefore the normal spinning speed is There is a problem that the spinning speed is limited by the spinning speed of the spinning, and it is not possible to cope with the high spinning speed of the spinning device.

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

[0005]

In order to achieve the above-mentioned object, the present invention comprises a nozzle member having a nozzle hole and a hollow guide shaft body after a supplied sliver is drafted at a predetermined draft ratio. In a normal spinning state of the spinning member, the swirling airflow of the nozzle member is used to generate a yarn, and during yarn splicing work, in addition to the swirling airflow, an auxiliary member formed on the hollow guide shaft body is used. In a spinning method in which compressed air is jetted from the nozzle into the yarn passage, a suction force is generated from an opening formed at the tip of the hollow guide shaft toward the yarn discharge port to perform yarn discharge spinning. First, the draft ratio during the yarn discharge spinning is changed to the draft ratio in the normal spinning state, and after the yarn discharge spinning is completed, the changed draft ratio is changed to the normal spinning condition. Secondly, the spinning member side yarn catching means for catching the yarn end produced by the yarn delivering spinning and introducing the yarn end into the yarn splicing device, After capturing the yarn end spun by spinning, the changed draft ratio is returned to the draft ratio in the normal spinning state.

Further, in a spinning device having a drafting device for drafting a sliver supplied and a spinning member composed of a nozzle member and a hollow guide shaft, firstly, the draft ratio of the drafting device in a normal spinning state is set. ,
Draft ratio changing means for changing the yarn discharge spinning and means for returning the changed draft ratio to the draft ratio in the normal spinning state are provided. Secondly, a yarn splicing device and the above A spinning member side yarn catching means for catching the yarn end spun and introducing it into a yarn splicing device, the yarn catching means catching the yarn end spun yarn end, and a modified draft A means for returning the ratio to the draft ratio in the normal spinning state is provided. Thirdly, a plurality of spinning units including the above draft device and spinning members are arranged in parallel, and the draft device It is configured by a plurality of different draft rollers, at least one roller among the plurality of rollers,
The spinning machine is driven by a motor that drives each spinning unit, and a control unit that controls the rotation speed of the motor for each spinning unit is provided.

[0007]

EXAMPLES Examples of the present invention will be described below, but the present invention is not limited to these examples as long as the gist of the present invention is not exceeded.

First, an outline of a spinning unit constituting the spinning apparatus of the present invention will be described with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a fiber bundle housed in a can 2, D denotes a plurality of draft rollers, and a back roller 3, a third roller 4, and an apron belt 5 are provided.
In the drawing, a is a four-wire draft device including a second roller 5 and a front roller 6 mounted on the a. S is a spinning member which will be described later, and 7 is a yarn feeding member including a nip roller 7a and a delivery roller 7b. Reference numeral 8 is a slack tube for temporarily storing the yarn discharged from the spinning member S whose spinning has been restarted during yarn joining operation, and 9 is a yarn clearer.

Reference numeral 10 denotes a package wound around a bobbin 12 supported by a bobbin holder 11, and the package 10 is configured to rotate when a friction roller 13 comes into contact with the surface of the package 10. . 1
Reference numeral 4 denotes a traverse guide of a traverse device (not shown). The bobbin 1 supported by the bobbin holder 11
The winding member W is composed of the two, the friction roller 13, the traverse guide 14, and the like.

The fiber bundle 1 drawn out from the can 2 through the guide bar 15 is drafted by the drafting device D, and then enters the spinning member S to be formed into yarn. After that, the yarn Y discharged from the spinning member S is nipped by the nip roller 7a and the delivery roller 7b which form the yarn feeding member 7, and is fed toward the package 10. Then, while being traversed by the traverse guide 14, it abuts on the friction roller 13 and is wound around the rotating package 10.

A spinning unit U composed of the draft device D, the spinning member S, the yarn feeding member 7, the slack tube 8, the yarn clearer 9 and the winding member W as described above is shown in FIG. As described above, a large number of spinning devices are arranged in parallel along the machine base F.

As shown in FIG. 2, E1 is a motor box arranged at one end of the spinning device, and E2 is
It is a blower box arranged at the other end of the spinning device. A is a splicing carriage, and the splicing carriage A is
It is configured to run on a rail R arranged along the longitudinal direction of the spinning device. The yarn splicing carriage A has a known suction nozzle a1 as a yarn catching means on the spinning member side.
A known yarn splicing device a2 such as a knotter or a splicer
Also, a known suction mouth a3 as a package side yarn catching means is provided.

Next, the spinning member S will be described with reference to FIG.

As shown in FIG. 3, 16 is an introduction hole 16 for introducing the fiber bundle 1 drafted by the drafting device D.
a fiber introduction block having a and a needle 16b arranged on the flow path of the fiber bundle 1.
Is fitted into a mounting hole 17a formed at the tip of the nozzle member 17. On the downstream side (the lower side in FIG. 3) of the mounting hole 17a into which the fiber introducing block 16 is fitted, there is an inner peripheral wall 17b inclined in a divergent shape in a direction away from the fiber introducing block 16, and having a substantially truncated cone shape. Space 17c
Are formed. 17d is a plurality of nozzle holes formed in the nozzle member 17 located near the fiber introduction block 16, 17e is a compressed air supply member in which the air passage 17e1 is formed so as to surround the nozzle hole 17d,
The compressed air supply member 17e is connected to a compressed air supply source (not shown).

Reference numeral 17f is a suction hole formed in the cylindrical portion 17g of the nozzle member 17, and a pipe 18 connected to an air suction source (not shown) is connected to the suction hole 17g.

Reference numeral 19 denotes a hollow guide shaft body, which has a truncated cone-shaped tip portion 19a and a tubular body portion 19c having an annular internal air passage 19b.
A thread passage 19d is formed along the axis of the hollow guide shaft body 19. The internal air passage 19b and the yarn passage 19d are
They are connected by an auxiliary nozzle 19e, and the internal air passage 19b has a through hole 19 formed in the cylindrical portion 19c.
A pipe 21 connected to a compressed air supply source (not shown) is connected via a connector 20 connected to f. The auxiliary nozzle 19e is configured to be located closer to the tip end portion 19a than the through hole 19f formed in the cylindrical body portion 19c. Compressed air from the compressed air supply source passes through the connector 20 and the pipe 21 and the internal air passage 19b.
After that, it is jetted from the auxiliary nozzle 19e, enters the yarn passage 19d formed in the hollow guide shaft body 19, and is directed toward the yarn discharge port 19g located on the side opposite to the tip end portion 19a of the hollow guide shaft body 19. It is configured to flow.

The hollow guide shaft body 19 is the shaft body mounting member 2
2 is fitted in a mounting hole 22a formed in the shaft member mounting member 22.
It is configured to be united with the nozzle member 17 by being fitted into the cylindrical portion 17g. Further, the truncated cone-shaped tip portion 19a of the hollow guide shaft body 19 is arranged in the substantially truncated cone-shaped space portion 17c of the nozzle member 17, and
The tip portion 19a is arranged so as to face the needle 16b attached to the fiber introducing block 16.

Next, the process of producing the yarn Y by the spinning unit which constitutes the spinning device having the above-mentioned construction will be outlined.

The fiber bundle 1 drawn from the can 2 and supplied to the draft device D is drafted by the draft device D at a predetermined draft ratio, and then the action of the blast air jetted from the nozzle hole 17d of the nozzle member 17 is performed. The suction air flow near the introduction hole 16a of the fiber introduction block 16 generated in the above step enters the introduction hole 16a, and then the needle 1
Of the space portion 17c formed along the periphery of 6b and formed in the nozzle member 17, the distal end portion 1 of the hollow guide shaft body 19
Spinning chamber 1 located between 9a and fiber introduction block 16
Enter 7c1.

Fiber bundle 1 sucked into the spinning chamber 17c1
The fibers constituting the are subjected to the action of a swirling airflow that is jetted from the nozzle hole 17d and swirling at a high speed in the vicinity of the tip end portion 19a of the hollow guide shaft body 19, and while being separated from the fiber bundle 1, a part thereof is inverted End portion 19 of hollow guide shaft body 19
a While being wound around the outer periphery of the yarn Y, and further being swirled around the yarn Y that is being produced, the yarn Y is wrapped around the outer periphery of the yarn Y and twisted in the direction of the swirling airflow. Further, a part of the twist applied by the swirling airflow tends to propagate in the direction of the front roller-6, but since the propagation is blocked by the needle 16b, the fiber bundle 1 sent from the front roller-6 is It is not twisted by the above twist. The fibers twisted by the swirling air flow are sequentially generated into a real twisted yarn Y composed of a core fiber and a wound fiber wound around the core fiber, pass through a yarn passage 19d of the hollow guide shaft body 19, and are discharged. It is discharged from the outlet 19g. Such a normal yarn Y
In the production process of the
Compressed air is not supplied to the internal air passage 19b of the hollow guide shaft body 19 through 1 and the connecting member 20, and therefore, compressed air is not supplied to the yarn passage 19d from the auxiliary nozzle 19e.

In a normal spinning state, the yarn Y, which has passed through the yarn passage 19d of the hollow guide shaft 19 and exits from the yarn discharge port 19g, is fed by the nip roller 7a and the delivery roller 7b constituting the yarn feeding member 7. It is sandwiched and sent in the direction of the package 10, and then, while being traversed by the traverse guide 14, it comes into contact with the friction roller-13,
It is wound up on the rotating package 10.

Next, the yarn splicing operation of the spinning device having the above-mentioned structure will be described.

At the start of spinning or when yarn breakage occurs, the back roller 3 and the third roller 4 are stopped. Therefore, the fiber bundle 1 is stopped by the stopped third roller 4.
And is constantly cut between the rotating second roller 5 and the tip of the fiber bundle 1 is gripped by the stopped third roller 4. During the yarn splicing operation, the fiber bundle 1 is sent out by re-driving the back roller 3 and the third roller 4, and at the same time, it is passed through the second roller 5 and the front roller 6 which are rotationally driven to the spinning member S. Supply. When the driving of the draft device D, which has been stopped, is restarted, the injection of compressed air is started from the nozzle hole 17d of the nozzle member 17 and the auxiliary nozzle 19e of the hollow guide shaft body 19. That is, during the yarn splicing operation, the compressed air is jetted from the nozzle hole 17d of the nozzle member 17, and the pipe 2 is supplied from the compressed air supply source.
Compressed air is supplied to the internal air passage 19b of the hollow guide shaft body 19 via 1 and the connecting member 20, and therefore compressed air is also injected into the passage 19d from the auxiliary nozzle 19e.

Since the compressed air jetted from the nozzle hole 17d of the nozzle member 17 flows in the feeding direction of the fiber bundle 1 while swirling, the fiber bundle 1 introduced into the introducing hole 16a of the fiber introducing block 16 is swirled. The air is sent to the vicinity of the tip portion 19a of the hollow guide shaft body 19 through the needle 16b while being brought into a loose false twist state by the air flow. Further, the compressed air jetted from the auxiliary nozzle 19e flows along the yarn passage 19d formed in the hollow guide shaft body 19 while forming a swirling airflow, and is formed in the tip end portion 19a of the hollow guide shaft body 19. An air flow in the suction direction (direction toward the inside of the hollow guide shaft body 19) is generated near the opened opening 19h. Accordingly, the fiber bundle 1 can be continuously drawn into the yarn passage 19d of the hollow guide shaft body 19.

The fiber bundle 1 in the false twist state sent near the opening 19h formed in the tip portion 19a of the hollow guide shaft body 19
Is sucked into the yarn passage 19d through the opening 19h. Then, the fiber bundle 1 is exposed to the swirling air current generated by the compressed air jetted from the auxiliary nozzle 19e in the yarn passage 19d. Due to the swirling airflow generated in the spinning chamber 17c1 by the compressed air injected from the nozzle holes 17d of the nozzle member 17 and the compressed air injected from the auxiliary nozzle 19e of the hollow guide shaft body 19, the hollow guide shaft The fiber bundle 1 in a loose false twist state due to the swirling air current generated in the yarn passage 19d of the body 19
Is discharged from the yarn discharge port 19g of the hollow guide shaft body 19 while being spun into a bundled fibrous yarn (a bundled yarn).

As described above, after the yarn breaks, the back roller 3 and the third roller 4 are re-driven to make the fiber bundle 1
Is resumed and the bundled fibrous yarn is spun by the compressed air jetted from the nozzle hole 17d of the nozzle member 17 and the compressed air jetted from the auxiliary nozzle 19e formed in the hollow guide shaft body 19. The state in which this is done is called yarn discharge spinning.

After an appropriate time has elapsed after the above-described yarn discharge spinning, the supply of compressed air from the compressed air supply source to the internal air passage 19b of the hollow guide shaft 19 is stopped, and the yarn passage from the auxiliary nozzle 19e is stopped. By stopping the injection of compressed air into 19d, the swirling airflow in the hollow guide shaft body 19 disappears, and the normal spinning state is restored.

As described above, the yarn Y produced by restarting the spinning is arranged on the yarn splicing carriage A stopped at the position of the spinning unit U for performing the yarn splicing work, and the hollow guide shaft is used. The suction nozzle a1 known to be rotatable to a position near the yarn discharge port 19g of the body 19 is sucked by the upward rotation, and then is distributed to the yarn splicing carriage A with the downward rotation of the suction nozzle a1. It is introduced into a known yarn splicing device a2. Suction nozzle a1
While being guided to the yarn splicing device a2 by the yarn, the yarn Y is nipped by the nip roller 7a and the delivery roller 7b that form the yarn feeding member 7. On the other hand, the end portion of the yarn Y wound in the package 10 is sucked by a known suction mouth a3 provided in the yarn splicing carriage A,
After that, with the upward rotation of the suction mouse a3,
It is introduced into the above yarn joining device a2. Then, after the yarn Y generated by the spinning member S and the yarn Y drawn out from the package 10 are introduced into the yarn joining device c2, the yarn joining device c2 is driven to join both yarns Y, The joining work will be completed. The extra yarn Y generated during this yarn splicing operation is once stored in the slack tube 8 as is known.

Next, with reference to FIGS. 2 and 4, the draft device D, the spinning member S, the yarn feeding member 7, the yarn clearer 9 are used.
The operation and drive control of the winding member W and the like will be described.

M1 is provided for each spinning unit U,
A single weight drive motor for driving the back roller 3 and the third roller 4, and a pulley 3a attached to the back roller 3, a pulley 4a attached to the third roller 4, and an output shaft of the single weight drive motor M1. The back roller 3 and the third roller 4 are rotationally driven by stretching the endless belt b1 between the pulley m1 and the pulley m1. Single spindle drive motor M1
Is configured to be controlled for each spinning unit by a central controller C1 as a host controller via a motor driver MD1.

M2 is a common motor that rotationally drives the second roller 5 via the transmission T1, and also rotationally drives the front roller 6, the delivery roller 7b and the friction roller 13 that form the yarn feeding member 7, respectively. The common motor M2 is provided in the prime mover box E1 and is common to the plurality of spinning units U constituting the spinning device. This common motor M2 is a motor driver MD
2 is configured to be controlled by a central control device C2 as a host controller disposed in the prime mover box E1. And the central controller C2
When the common motor M2 is accelerated or decelerated via the motor driver MD2 in response to the command, the second roller 5, the front roller 6, the yarn feeding member 7, and the friction roller 13 are synchronized while maintaining a predetermined rotation speed ratio. It is configured to be controlled by the state. As a result, the back roller 3, the third roller 4, the second roller 5, and the front roller 6 have different rotational speeds, so that a draft with a predetermined draft ratio is possible.

By the way, mainly the front roller 6
The thickness (count) of the generated yarn is determined by the amount of fibers discharged from the spinning member and supplied to the spinning member S. However, in the conventional spinning device, even in the yarn splicing operation of the spinning device, The same amount of fibers as in the yarn production operation was supplied from the draft device D to the spinning member S. However, if the amount of the fiber bundles 1 supplied to the spinning member S is not appropriate during the yarn discharge spinning in the joining operation, the yarn discharge spinning will fail. For example, when a yarn breakage occurs in the process of producing the fine count spun yarn Y, the same amount of fibers as in the normal fine count yarn producing operation is supplied to the spinning member S to cause the yarn described above. When the spinning is performed, the amount of fibers is small. Therefore, depending on the spinning conditions, the amount of fibers required to bind the fibers may not be satisfied in the production of the binding yarn at the time of spinning the yarn. Generation will fail. For example, when performing yarn discharge spinning at high speed, the time during which the fibers are exposed to the swirling air flow is short, and because of the reasons described above, it is difficult to obtain sufficient fiber bundling, and the generated yarn is spun downstream. Because it is not strong enough to be put out. On the contrary, if a thread breakage occurs in the process of generating a thick count,
The same amount of fibers as in the normal thick count yarn production work is used for the spinning member S.
When the above-mentioned yarn discharge spinning is performed, the amount of fibers is too large and the opening 19h of the hollow guide shaft body 19 of the spinning member S is increased.
The fibers are clogged in the yarn, and the yarn generation in the yarn discharge spinning fails.

In order to improve the success rate of the above-mentioned yarn discharge spinning, mainly referring to FIG. 4 and FIG. 5 showing the relationship between the rotation speed of the single spindle drive motor M1 and the time during the yarn splicing operation, A yarn splicing operation in the embodiment of the present invention will be described.

When the generated yarn Y has a defective portion such as a thick portion or a thin portion such as a slab, this defective portion is detected by the yarn clearer 9, and the yarn Y in which the defective portion is detected is The yarn Y on the package 10 side, which is cut by the cutter, is wound around the package 10. The yarn defect portion detection signal from the yarn clearer 9 is input to the central controller C1 as shown in FIG. Based on this yarn defect portion detection signal, when the central controller C1 stops driving the single spindle drive motor M1 via the motor driver MD1, the rotations of the back roller 3 and the third roller 4 are stopped,
The fiber bundle 1 is cut between the second roller 5 and the third roller 4 which are constantly rotating (time T in FIG. 5).
1). The fiber bundle 1 sent from the second roller 5 and the front roller 6 which are constantly rotating is still
The yarn Y is supplied to the driving spinning member S to be generated into the yarn Y, and the generated yarn Y is sucked and removed by a duct (not shown) immediately upstream of the cutter.
After that, the ejection of compressed air from the nozzle holes 17d formed in the nozzle member 17 constituting the spinning member S is stopped,
The operation of the spinning member S is stopped and the package 1
0 is separated from the friction roller 13 to stop the rotation of the package 10.

After that, the above-described yarn discharge spinning is performed. For example, when a yarn breakage occurs in the process of producing the fine count yarn Y, the same as the normal fine count yarn production work. When the yarn amount spinning is performed by supplying the fiber amount, the yarn amount spinning may fail because the fiber amount to the spinning member S is small. Therefore, in the present embodiment, when the spinning is restarted, The central controller C1 raises the rotation speed of the single-spindle drive motor M1 that rotationally drives the back roller 3 and the third roller 4 from the central controller C1 via the motor driver MD1, thereby increasing the draft of the draft device D. The ratio is decreased and the amount of fibers supplied to the spun member S is increased. In normal spinning, the rotation speed of the second roller 5 is higher than the rotation speed of the back roller 3 and the third roller 4, and the rotation speed of the front roller 6 is higher than the rotation speed of the second roller 5. This is because it is faster. In particular, the difference in rotation speed between the second roller 5 and the front roller 6 is set to be larger than the others.

The fiber bundle 1 whose tip is gripped by the stopped third roller 4 is sent out by re-driving the back roller 3 and the third roller 4 in response to a command from the central controller C1 (see FIG. 5). Time T2), as described above, the back roller 3 and the third roller 4 are rotated at a high speed from the normal spinning state in response to a command from the central control device C1 to reduce the draft ratio of the draft device D, and the second roller. 5 and the front roller 6 are supplied to the spinning member S with more fibers than in the normal yarn production process (time T3 in FIG. 5). At approximately the same time as the driving of the draft device D that was stopped was restarted, the spinning member S
Of the nozzle hole 17d formed in the nozzle member 17
The jetting of the compressed air from the nozzle is restarted, and the compressed air is jetted from the auxiliary nozzle 19e formed in the hollow guide shaft body 19 to perform the yarn discharge spinning as described above.

The yarn Y generated by the yarn discharge spinning is discharged from the yarn discharge port 19g of the hollow guide shaft body 19 and is positioned near the yarn discharge port 19g by rotating upward.
The yarn Y is captured by the suction nozzle a1 arranged on the yarn splicing carriage A (time T4 in FIG. 5). afterwards,
With the downward rotation of the suction nozzle a1, the yarn Y sucked and captured by the suction nozzle a1 is introduced into the yarn splicing device a2 arranged in the yarn splicing carriage A, and the yarn is spun by the suction nozzle a1. While being guided to the splicing device a2, the yarn Y is nipped by the nip roller 7a and the delivery roller 7b that form the yarn feeding member 7, and the feeding of the yarn Y is started, so that the yarn Y is stably fed. (Time T5 in FIG. 5).

Further, in parallel with the above-described work of introducing the yarn Y into the yarn splicing device a2 by the suction nozzle a1, the suction mouth of the suction mouth a3 arranged in the yarn splicing carriage A is also shown. Package 1 that is rotating in the opposite direction to the winding direction by the reverse roller that is not installed
The yarn Y wound around the package 10 is sucked toward 0, and the suction mouth a3 is rotated upward to introduce the yarn Y into the yarn splicing device a2. Then, after the yarn Y generated by the spinning member S and the yarn Y pulled out from the package 10 are introduced into the yarn joining device a2,
The yarn splicing device a2 is driven to splice both yarns Y, and the yarn splicing operation by the yarn splicing device a2 ends (time T8 in FIG. 5). The extra yarn Y during the yarn splicing work is
It will be temporarily stored in the slack tube 8 mentioned above. Further, since the thick yarn portion generated based on the changed draft ratio is discarded during the yarn joining operation of the yarn joining device a2, such a thick yarn portion is not caught in the package 10. Absent.

Even during the yarn discharge spinning described above, the second roller 5, the front roller 6, the yarn feeding member 7 and the friction roller 13 which are rotationally driven by the common motor M2 are synchronized in the same manner as in the normal spinning process. Controlled.

In the above-described yarn discharge spinning process, the timing for returning the changed draft ratio to the normal draft ratio is the time when the yarn discharge spinning is completed (time T in FIG. 5).
6) It is preferable to return the changed draft ratio to the normal draft ratio. The yarn discharge spinning is performed between the time T2 and the time T6 described above, and thereafter, at time T6, the air injection from the auxiliary nozzle 19e is stopped, and the normal full-twist spinning is restarted. Become. Further, whether or not the yarn discharge spinning is completed is determined by the yarn discharge port 1 of the hollow guide shaft body 19.
A thread detection sensor is provided on 9g, and a thread detection signal from the thread detection sensor is transmitted to the central control device C1. Based on this thread detection signal, rotation of the single spindle drive motor M1 is performed via the motor driver MD1. Then, the rotational speed in the normal yarn production process is restored (time T7 in FIG. 5). In addition, in order to determine the timing of time T7 in FIG.
Instead of providing the yarn detection sensor at the yarn discharge port 19g of 9, the yarn detection sensor may be provided at the suction nozzle a1. As a result, it is possible to detect the yarn discharge spinning more reliably and the success of capturing the yarn spun by the spinning. Furthermore, as a simpler and more practical means, without disposing the thread detection sensor as described above,
At the time of yarn discharge spinning, the yarn discharge port 19 of the hollow guide shaft body 19
After the suction nozzle a1 located near the yarn discharge port 19g sucks and captures the yarn Y discharged from g, the suction nozzle a1 is rotated downward, or immediately after that, the changed draft ratio is changed. , It can also be configured to return to a normal draft ratio. With the above-described configuration, the thick yarn portion (between time T3 and time T7 in FIG. 5) generated based on the changed draft ratio can be made as short as possible, and such thick yarn It is possible to prevent the portion from being completely discarded and used for splicing and being caught in the package 10.

If yarn breakage occurs during spinning of the thick count yarn Y in the normal yarn generation process, the same fiber amount as in the normal thick count yarn generation operation is supplied. When the above-described yarn discharge spinning is performed, since the amount of fibers supplied to the spinning member S is large, the fibers are clogged in the openings 19h of the hollow guide shaft body 19 that configures the spinning member S, and the yarn discharge spinning fails. Therefore, in such a case, when the spinning is restarted, the central controller C1 lowers the rotation speed of the single spindle drive motor M1 via the motor driver MD1. The draft ratio is increased and the amount of fibers supplied to the spinning member S is reduced. Except that the amount of fibers supplied to the spinning member S is reduced, this is the same as the above-described embodiment, so a detailed description thereof will be omitted.

As described above, the spinning member is controlled by controlling the rotational speeds of the back roller 3 and the third roller 4 constituting the draft device D to change the draft ratio of the draft device D during the yarn discharge spinning. By adjusting the amount of fibers supplied to S to an appropriate amount, the success rate of yarn discharge spinning can be improved.

Further, since the draft ratio is changed by controlling the rotation speeds of the back roller 3 and the third roller 4 without controlling the rotation speed of the front roller 6, the spinning speed of the yarn Y is changed. Therefore, the success rate of yarn discharge spinning can be improved even if the spinning speed during normal spinning is high. Based on the change of the spinning speed, the second roller 5, the front roller 6, the yarn feeding member 7 and the friction roller 13 are
There is no need to change the rotation speed of the common motor M2 that is synchronously controlled. Therefore, the yarn discharge spinning can be performed in a stable state, and the control of the spinning device can be simplified.

In the above-mentioned embodiment, during the yarn discharge spinning,
The rotation speed of the single spindle drive motor M1 that rotationally drives the back roller 3 and the third roller 4 is controlled by the central controller C1.
Although an example in which it is changed by the command of is shown,
The back roller 3 and the third roller 4 may be rotationally driven by the common motor M2 arranged in the prime mover box E1, and the front roller 6 may be rotationally driven by the single spindle drive motor M1. In this case, by the command of the central controller C1, the rotation speed of the single spindle drive motor M1 and the rotation speed of the front roller 6 can be increased to increase the draft ratio of the draft device D. On the contrary, the draft ratio of the draft device D can be lowered by lowering the rotation speed of the single spindle drive motor M1 and lowering the rotation speed of the front roller 6. In normal spinning, this is higher than the rotational speed of the back roller 3 and the third roller 4
This is because the rotation speed of the second roller 5 is high and the rotation speed of the front roller 6 is higher than the rotation speed of the second roller 5. In particular, the difference in rotation speed between the second roller 5 and the front roller 6 is set to be larger than the others.

As a result, particularly when the fine count yarn Y is spun, the single spindle drive motor M1 is used in the yarn discharge spinning.
When the drafting ratio of the draft device D is lowered by lowering the rotation speed of the draft device D, it is possible to make the yarn spinning yarn count thicker and the spinning speed slower, so that the nozzle hole 17d and the auxiliary nozzle 19e can be more reliably operated. The swirling airflow can be applied to the fiber bundle, and the success rate of yarn discharge spinning can be further improved.

As described above, when the draft ratio of the draft device D is changed by changing the rotation speed of the front roller 6, the spinning speed (yarn generation speed) of the spinning member S is the normal spinning state. Will be different from
In such a case, the rotation speeds of the second roller 5, the yarn feeding member 7 and the friction roller 13 are changed by a command from the motor driver MD1 so that the second roller 5, the front roller 6, the yarn feeding member 7 and the friction roller 13 are changed. Are configured to be controlled in a synchronized state.

[0048]

Since the present invention has the constitution described above, it has the following effects.

Since the draft ratio in the yarn discharge spinning is appropriately changed from the draft ratio in the normal spinning state, it is possible to surely generate the yarn in the yarn discharge spinning, and therefore, the yarn can be surely generated. The success rate of splicing is improved.

After the spinning member side yarn catching means catches the yarn after the yarn discharge spinning, the changed draft ratio is returned to the draft ratio in the normal spinning state. It is possible to prevent the structured yarn from being wound into the package.

At least one roller among a plurality of draft rollers having different rotation speeds constituting the draft device is driven by a motor for driving each spinning unit, and the rotation speed of the motor is controlled for each spinning unit. Since the means is arranged, the draft ratio is changed by changing the rotation speed of the roller, so that the spinning speed of the yarn does not change, and therefore, the yarn feeding member, the winding member, etc. Since it is not necessary to change the control, the yarn discharge spinning can be performed in a stable state, and the control of the spinning device can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view of a spinning unit that constitutes a spinning device of the present invention.

FIG. 2 is a schematic front view of a spinning device and a yarn splicing cart according to the present invention.

FIG. 3 is a side sectional view of a spinning member that constitutes the spinning device of the present invention.

FIG. 4 is a schematic side view including a control block and the like of the spinning device of the present invention.

FIG. 5 is a graph showing the relationship between the rotation speed of a single spindle drive motor and time during yarn splicing work.

[Explanation of symbols]

A ..... Thread splicing cart D: Draft device S ・ ・ ・ ・ ・ ・ ・ ・ Spinning material 1 ... Fiber bundle 7 ... Thread feed member 10 ... Package 17 ... Nozzle member 19 ・ ・ ・ ・ ・ ・ Hollow guide shaft

Claims (5)

[Claims] 1. A sliver to be supplied is drafted at a predetermined draft ratio, and then, in a normal spinning state by a spinning member composed of a nozzle member having a nozzle hole and a hollow guide shaft, a swirling air flow of the nozzle member is generated. The yarn is generated using the hollow guide by injecting compressed air into the yarn passage from the auxiliary nozzle formed in the hollow guide shaft during the yarn splicing operation, in addition to the swirling airflow. In the spinning method in which a suction force is generated from the opening formed at the tip of the shaft toward the yarn discharge port to perform the yarn discharge spinning, the draft ratio during the yarn discharge spinning is
A spinning method, wherein the draft ratio is changed to that in a normal spinning state, and after the yarn discharge spinning is finished, the changed draft ratio is returned to the draft ratio in a normal spinning state. 2. A spinning member side yarn catching means for catching a yarn end discharged by the yarn discharge spinning and introducing the yarn end into a yarn splicing device, after catching the yarn end spun by the yarn discharge spinning, The spinning method according to claim 1, wherein the changed draft ratio is returned to the draft ratio in a normal spinning state. 3. A spinning device having a drafting device for drafting a sliver supplied, and a spinning member comprising a nozzle member and a hollow guide shaft, wherein the draft ratio of the drafting device in a normal spinning state is A spinning device having a draft ratio changing means for changing the draft ratio and a means for returning the changed draft ratio to the draft ratio in a normal spinning state. 4. A yarn splicing device and a spinning member side yarn catching means for catching the yarn end spun and introducing it into the yarn splicing device, wherein the yarn catching means is spun out. The spinning device according to claim 3, further comprising means for returning the changed draft ratio to the draft ratio in a normal spinning state after capturing the yarn end. 5. A plurality of spinning units including the draft device and a spinning member are arranged in parallel, and the draft device is composed of a plurality of draft rollers having different rotational speeds, and at least one of the plurality of rollers. The one roller is driven by a motor that drives each spinning unit, and a control unit that controls the rotation speed of the motor for each spinning unit is provided. Spinning equipment.