JPH08218234A - Method for piecing yarn in spinning machine - Google Patents

Abstract

PURPOSE: To provide a method for piecing yarns in a spinning machine, always hardly loosening yarn regardless of size of wound diameter of wound package in yarn breakage and capable of obtaining stable good pieced up section. CONSTITUTION: This method for piecing yarns in a spinning machine is to control driving timing of a draft roller d1 to a driving timing of a winding package according to wound diameter of a winding package w3 in yarn breakage in piecing method in a spinning machine utilizing a turning air stream capable of separating a nozzle member s2 from a spindle member s1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn splicing method for splicing cut yarns in a spinning machine utilizing a swirling air flow having a spinning unit in which a spindle member can be separated from a nozzle member.

[0002]

2. Description of the Related Art Conventionally, in a spinning machine which utilizes a swirling airflow in which a spindle member can be separated from a nozzle member, when a yarn is cut, the spindle member is separated from the nozzle member and then wound around the spindle member. The yarn unwound from the winding package from the take-up side (hereinafter referred to as "seed yarn").
Also called. ), The nozzle member and spindle member are united, then the spinning unit is restarted, and the back roller of the draft device is restarted to restart the supply of the sliver, and then the spindle. Immediately before the fibers forming the sliver reach the seed thread inserted in the member and splicing is performed, the separated nip roller is brought into contact with the delivery roller to pull the seed thread, or immediately thereafter. A yarn splicing method for a spinning machine is known in which a series of yarn splicing operations are performed by rotating a winding package.

Further, instead of bringing the separated nip roller into contact with the delivery roller to pull the seed yarn, the take-up package is rotated by keeping the nip roller separated from the delivery roller. A yarn splicing method for a spinning machine is known in which the yarn is taken up. In this case, the back roller of the draft device is re-driven to restart the supply of the sliver, and then the seed yarn inserted in the spindle member is wound before the fibers constituting the sliver reach and splicing is performed. The take-up package is rotated, and immediately after the end of yarn joining, the separated nip roller is brought into contact with the delivery roller to perform a series of yarn joining operations.

[0004]

In the conventional yarn splicing method of the spinning machine described above, after the yarn splicing, first, the separated nip roller is brought into contact with the delivery roller to take out the seed yarn. In the yarn splicing method, the length of the seed yarn, which is inserted into the spindle member and pulled out from the tip thereof, the driving timing of the back roller and the contact timing of the nip roller to the delivery roller,
The same seam shape can always be obtained by keeping the value constant, but since the rising speed of the winding package differs depending on the diameter of the winding package (when the diameter of the winding package is large, The rising speed is slower than in the case of small diameter.) Especially, when the diameter of the winding package is large, the yarn is greatly loosened between the winding package consisting of the nip roller and the delivery roller and the winding package. There is a problem.

Of the above-mentioned conventional yarn splicing methods for spinning machines, in the yarn splicing method in which the seed yarn is first taken up by the winding package after the yarn splicing, as described above, the winding package is used. At the beginning of driving
When the winding package has a large diameter, the take-up speed of the seed yarn is slow, and when the winding package has a small diameter,
Since the take-up speed of the seed yarn is high, there is a problem that the seam shape differs depending on the size of the winding package. That is, when the winding package has a large diameter and the take-up speed of the seed yarn is slow, when the take-up package has a small diameter and the take-up speed of the seed yarn is fast due to the supply of the sliver restarted by re-driving the back roller. As compared with the above, more fibers are inserted into the spindle member and adhere to the seed yarn pulled out from the tip of the spindle member, so that there is a problem that the seam becomes thick in a slab shape. Further, when the winding package has a large diameter, the yarn is loosened more than when the winding package has a small diameter.

An object of the present invention is to solve the problems of the conventional yarn splicing method for a spinning machine as described above, and to provide a yarn splicing method for a spinning machine that can obtain a stable and good seam form. It is in.

[0007]

In order to achieve the above object, the present invention provides a yarn splicing method for a spinning machine which utilizes a swirling air flow in which a nozzle member and a spindle member can be separated from each other. The drive timing of the draft roller relative to the drive timing of the take-up package is controlled according to the winding diameter of the take-up package, and after the yarn splicing, the nip roller is wound away from the delivery roller. In a yarn splicing method for a spinning machine that utilizes a swirling air flow in which a nozzle member and a spindle member are separable, the seed yarn is taken out by rotating a take-up package, The timing of fiber arrival at the winding package is large when the winding package is large and small when the winding package is small. In addition, the nozzle member and the spindle member are separated so that the nip roller that is separated from the delivery roller is brought into contact with the delivery roller after the splicing, and the seed yarn is taken off. In a yarn splicing method for a spinning machine using a possible swirling air flow, a yarn of a predetermined length is placed between the yarn take-up device including the nip roller and the delivery roller and the winding section before the yarn splicing. It was stored.

[0008]

EXAMPLE First of all, FIG. 1 is a schematic side view of a spinning machine.
A spinning machine as an example to which the yarn splicing method for a spinning machine of the present invention is applied will be described with reference to FIG.

L is a sliver supplied to the draft device D through a sliver guide G, and the draft device D
Is composed of a back roller d1, a third roller d2, a second roller d3 having an apron, and a front roller d4. The sliver L drafted by the draft device D is a nozzle member having an injection hole for generating a swirling air flow. The yarn Y, which is supplied from a nozzle member to a spinning unit S including a separable spindle member, is formed into a yarn Y by the spinning unit S, and then the yarn Y includes a nip roller h1 and a delivery roller h2, which are separable from each other. The cradle arm w2 is driven by the friction roller w1 of the winding section W through the take-up device H and the like.
It is wound up by the winding package w3 supported by.
In addition, d1 ', d2', d3 ', and d4' are the back roller d1, the third roller d2, the bottom roller of the second roller d3 and the front roller d4 which have an apron, respectively, and d5 is the back roller d1. A clutch device such as an electromagnetic clutch for stopping or driving.

Next, the yarn splicing order will be described with reference to FIG. 1, FIG. 2, FIG. 3, and FIG. 4, which are enlarged side views of the draft device D, the spinning unit S, and the like.

When the yarn Y is cut, the clutch device d5 is cut through an appropriate yarn breakage detector (not shown) to stop the driving of the back roller d1.
The driving of the entire draft device D is stopped, the supply of the sliver L is stopped, and thereafter, as shown in FIG. 2, the cylinder c1 is actuated to be attached to the support member c3 at the tip of the rod c2. The existing spindle member s1 is separated from the nozzle member s2. Further, when the driving of the draft device D is stopped, the delivery roller h2 is moved to the nip roller h1.
To stop the winding of the yarn Y by the yarn drawing device H, and separate the winding package w3 from the friction roller w1 to stop the rotation of the winding package w3. In addition, s2 'is an injection hole for generating a swirling air flow provided in the nozzle member s2,
It is connected to a suitable compressed air supply, not shown.

Next, by reversing the winding package w3, the yarn Y is rewound from the winding package w3, and the unwound yarn Y is used as a seed yarn Y ', as shown in FIG. Hollow passage s1 ′ of spindle member s1
And the seed yarn Y ′ having a constant length is always pulled out from the tip of the spindle member s1. If necessary, the tip of the seed yarn Y ′ may be defibrated so that the fibers are easily attached to the seed yarn Y ′.

Then, the cylinder c1 is operated to separate the separated spindle member s1 and nozzle member s2 from each other.
Merge as shown in FIG. After that, the clutch device d5 is operated and the back roller d1 is rotated to re-drive the draft device D, and the supply of the sliver L is restarted. In addition, s3 is a suction hole for making the air chamber s4 into a weak negative pressure state during spinning of the yarn Y, and by maintaining the air chamber s4 in a weak negative pressure state, the air chamber s4 is placed inside the air chamber s4. The harmful floating fibers generated can be removed through the suction holes s3.

As described above, when the separated nip roller h1 is brought into contact with the delivery roller h2 and the seed yarn Y'is taken off after the yarn splicing, the seed yarn Y inserted into the spindle member s1. Immediately before or immediately after the fibers forming the sliver L reach the yarn end and the yarn splicing is performed, the separated nip roller h1 is brought into contact with the delivery roller h2 to take up the seed yarn Y ′, or immediately thereafter. The winding package w3 is brought into contact with the friction roller w1, the winding package w3 is rotated, the winding of the yarn Y is restarted, and a series of yarn joining operations is completed.

When the seed yarn Y'is taken up by the winding package w3 while the nip roller h1 is kept separated from the delivery roller h2,
The take-up package w3 is brought into contact with the friction roller w1 a predetermined time before the fibers constituting the sliver L, the supply of which is restarted by the re-driving of the draft device D, reach the seed yarn Y ′ inserted through the spindle member s1. Then, the winding package w3 is rotationally driven, and immediately after the end of the yarn joining, the separated nip roller h1 is brought into contact with the delivery roller h2 to restart the take-up of the yarn Y, and the series of yarn joining operations is completed.

Next, after the yarn splicing, in the yarn splicing method, the nip roller h1 is kept separated from the delivery roller h2, and the winding yarn w'is taken up by rotating the winding package w3. When the drive timing of the taking package w3 is constant,
When the winding package w3 has a large diameter and when the winding package w3 has a small diameter, the driving timing of the back roller d1, the timing of arrival of the fiber to the seed yarn Y ′, and the delivery roller h2 of the nip roller h1. The contact timing will be described with reference to FIG. 5, which is a drive timing chart thereof.

In FIG. 5, the drive timing shown by the solid line is the drive timing of the back roller d1 when the winding package w3 has a small diameter, the arrival timing of the fiber to the seed yarn Y ', and the delivery of the nip roller h1. The drive timing indicated by the dotted line, which is the contact timing with the roller h2, is the drive timing of the back roller d1 when the winding package w3 has a large diameter, the arrival timing of the fiber to the seed yarn Y ′, and the nip roller h1.
Is the timing of contact with the delivery roller h2.

When the winding package w3 has a large diameter, the rising speed is slower than when the winding package w3 has a small diameter. Therefore, even if the fiber reaches the seed yarn Y ', the seed yarn Y is still formed. 'S take-up speed is slow, so
The back roller d with respect to the drive timing of the winding package w3 regardless of the diameter of the winding package w3.
When the drive timing of 1 is constant, the take-up speed of the seed yarn Y ′ is slow. When the winding package w3 has a large diameter, many fibers are attached to the seam and the seam is thickly formed in a slab shape. So, the winding package w
With respect to the drive timing of No. 3, the timing at which the fiber reaches the seed yarn Y'and the yarn splicing is performed is the winding package w.
When 3 is a large diameter, the winding package w3 is delayed more than when the winding package w3 is a small diameter, and during this period, the winding package w3 is accelerated and the fiber reaches the seed yarn Y'and the yarn splicing is performed. Winding package w3 at the time
Thus, the take-up speed of the seed yarn Y'by the yarn is increased.

If the timing at which the fiber reaches the seed yarn Y'and the splicing is determined according to the diameter of the winding package w3, the fiber necessarily reaches the seed yarn Y'and the splicing is performed. Based on the timing, the drive timing of the back roller d1 and the timing of bringing the nip roller h1 into contact with the delivery roller h2 and pulling the seed yarn Y ′ will also be determined. That is, the interval between the driving timing of the back roller d1 and the timing at which the fiber reaches the seed yarn Y ′ and is spliced is constant regardless of the diameter of the winding package w3, and the fibers forming the sliver L are Immediately after the yarn reaches the seed yarn Y ′ and the yarn splicing is performed, the separated nip roller h1 is moved to the delivery roller h1.
The seed yarn Y'is brought into contact with the yarn 2 to take it up.

As described above, the winding package w3
Depending on the diameter of the seed yarn Y ', the timing at which the fibers reach the seed yarn Y'and the splicing is performed, the driving timing of the back roller d1 and the timing of bringing the nip roller h1 into contact with the delivery roller h2 and pulling the seed yarn Y' By doing so, it is possible to perform stable yarn splicing with a good seam and without slack in the yarn Y.

After the yarn splicing as described above, the seed yarn Y'is taken up by rotating the winding package w3 while keeping the nip roller h1 separated from the delivery roller h2. In the yarn splicing method, when the drive timing of the back roller d1 is constant, the arrival timing of the fiber to the seed yarn Y ′ when the winding package w3 has a large diameter and when the winding package w3 has a small diameter. The contact timing of the nip roller h1 with the delivery roller h2 and the drive timing of the winding package w3 will be described with reference to FIG. 6, which is a drive timing chart thereof.

In FIG. 6, the drive timing of the winding package w3 shown by the solid line is when the winding package w3 has a small diameter, and the drive timing of the winding package w3 shown by the dotted line is the winding timing. This is the case where the package w3 has a large diameter.

Also in this case, as in the case where the drive timing of the winding package w3 is constant, the timing at which the fiber reaches the seed yarn Y'with respect to the drive timing of the winding package w3 and the yarn splicing is performed. When the winding package w3 has a large diameter, the winding package w3 is delayed more than the winding package w3 having a small diameter, so that the winding package w3 is accelerated during this period.
This means that the take-up speed of the seed yarn Y ′ by the winding package w3 at the time when the fiber reaches the seed yarn Y ′ and the yarn splicing is performed is increased. As shown in FIG.
When the winding package w3 has a large diameter, the back roller d1 is larger than when the winding package w3 has a small diameter.
The interval between the drive timing of and the drive timing of the winding package w3 becomes narrower. In other words, when the winding package w3 has a large diameter, the winding package w3 is driven earlier after the back roller d1 is driven than when the winding package w3 has a small diameter. .

By the yarn splicing method as described above, the slack of the yarn Y can be greatly reduced and a stable and good seam can be obtained. However, after the yarn splicing, the yarn Y is separated first. Also in the yarn splicing method in which the nip roller h1 is brought into contact with the delivery roller h2 to take up the seed yarn Y ′, as shown in FIG. 7, which is a schematic side view of the spinning machine, the yarn take-up device H and the winding device are wound. The yarn absorbing tube E is arranged between the take-up portion W and the seed yarn Y ′.
A piecing method with less slack can be realized by controlling the arrival timing of the fibers to the fiber.

In the following, regarding the yarn joining method described above, the driving timing of the back roller d1 and the seed yarn Y'in FIG.
It will be described with reference to FIG. 8, which is a drive timing chart of the fiber arrival timing, the contact timing of the nip roller h1 to the delivery roller h2, and the drive timing of the winding package w3.

In FIG. 8, the drive timing of the winding package w3 shown by the solid line is when the winding package w3 has a small diameter, and the drive timing of the winding package w3 shown by the dotted line is the winding timing. This is the case where the package w3 has a large diameter.

As described above, the yarn Y is unwound from the winding package w3 by reversing the winding package w3 after the yarn breakage, and the unwound yarn Y is used as a seed yarn Y'as shown in FIG. As described above, after being inserted into the hollow passage s1 'of the spindle member s1 and withdrawing the seed yarn Y'of a fixed length from the tip of the spindle member s1, the separated spindle member s1 and nozzle member s2. Are combined as shown in FIG. 4, and the yarn Y of an appropriate length is added as shown in FIG.
It is stored in the yarn absorbing tube E in a negative pressure state by a suction device (not shown).

Then, the clutch device d5 is operated to rotate the back roller d1 to re-drive the draft device D to restart the supply of the sliver L, and the fibers reach the seed yarn Y'and splicing is performed. Immediately before, the separated nip roller h1 is brought into contact with the delivery roller h2 to take up the seed yarn Y '. In this embodiment, the yarn Y having a predetermined length is stored in the yarn absorbing tube E. Therefore, when the fiber reaches the seed yarn Y ′ and the yarn splicing is performed, the fiber reaches the seed yarn Y ′ so that the rotation of the winding package w3 is always at a steady speed. The winding package w3 can be driven earlier by a predetermined time than when the splicing is performed. In this way, even if the winding package w3 is driven earlier, the yarn Y wound on the winding package w3 is the yarn Y stored in the yarn absorbing tube E, so the spindle member s
The seed yarn Y'inserted in 1 does not move.

As described above, the winding package w3
When the winding package w3 has a large diameter, the start-up speed is slower than when the winding package w3 has a small diameter, and it takes time for the rotation of the winding package w3 to reach a steady state speed. In the case of the diameter, by driving the winding package w3 earlier than in the case of the winding package w3 having a small diameter, the yarn Y drawn by the contact between the nip roller h1 and the delivery roller h2 after the yarn splicing. And the speed of the yarn Y drawn by the winding package w3 can always be maintained at substantially the same speed.

In this way, by storing the yarn Y of a predetermined length in the yarn absorbing tube E in advance, the nip roller h
Even in the yarn splicing method for pulling the seed yarn Y ′ by the yarn pulling device H composed of 1 and the delivery roller h2, it is configured so that the slack of the yarn Y does not occur between the yarn pulling device H and the winding portion W. be able to.

Next, with reference to FIG. 9, which is a schematic side view of the spinning machine similar to that shown in FIG. 1, an example of a controller for discriminating the diameter of the winding package w3 and controlling it will be described.

U is a yarn splicing carriage in which a large number of spinning units S can run along the spinning machines arranged in parallel, and u1
Is a yarn splicing control unit arranged on the yarn splicing carriage U for controlling the yarn splicing operation, and u2 and u3 are sensors for detecting the movement amount of the package reverse roller. Further, u4 is a valve for controlling the supply of fluid to the package lifting cylinder for separating the winding package w3 from the friction roller w1.

At the time of yarn splicing work, in order to suck the cut yarn end wound in the winding package w3 with the suction mouth, the package lifting cylinder is operated to move the winding package w3 from the friction roller w1. Then, the package reversing roller is brought into contact with the winding package w3 to reverse the winding package w3. The movement amount of the package reversing roller depends on the size of the winding package w3 when the yarn Y is cut. Therefore, the size of the diameter of the winding package w3 at the time when the yarn Y is cut can be determined by detecting the movement amount of the package reversing roller with the sensors u2 and u3. In addition, in general, the package reversing roller is arranged at the tip of the arm that can swivel around the fulcrum,
The amount of movement of the package reversing roller can be detected by detecting the amount of rotation of this arm. For example, when the diameter of the winding package w3 when the yarn Y is cut is small, the movement amount of the arm provided with the package reversing roller is large, and when the diameter of the winding package w3 is large. Since the movement amount of this arm is small, the size of the diameter of the winding package w3 can be determined by detecting the movement amount of this arm.

Further, the winding package w3 is brought into contact with the friction roller w1 so that the winding package w3
In order to restart the winding of the yarn Y by means of 3, the valve u4 is operated by a command from the yarn splicing control unit u1 to stop the supply of the fluid to the package lifting cylinder, so that the winding package w3 can be moved to the cradle. Since the spring or the like arranged on the arm w2 is always biased to the friction roller w1 side, the winding package w3 comes into contact with the friction roller w1 and restarts the rotation.

As described above, the amount of movement of the package reverse roller is detected by the sensors u2 and u3, and the diameter of the winding package w3 is discriminated.
The start timing of the back roller d1 by the clutch device d5 and the contact timing of the winding package w3 with the friction roller w1 can be appropriately controlled by the yarn splicing control unit u1.

The amount of movement of the arm provided with the package reversing roller can be more accurately detected by providing a rotation angle detector such as an encoder on the rotation shaft of the arm. Further, instead of determining the diameter of the winding package w3 by the movement amount of the package reversing roller, the winding length of the yarn Y is measured,
By comparing the length of the yarn Y wound around the winding package w3 at the time of cutting with the length of the yarn Y wound around the winding package w3 when the yarn is full, the diameter of the winding package w3 is determined. Can also be determined.

[0037]

Since the present invention is constructed as described above, it has the following effects.

[0038] Regardless of the winding diameter of the winding package at the time of thread cutting, it is possible to realize a thread splicing method in which a slack of the thread is always small and a stable and good seam is obtained.

[Brief description of drawings]

FIG. 1 is a schematic side view of a spinning machine as an example to which a yarn splicing method for a spinning machine of the present invention is applied.

FIG. 2 is an enlarged side view of a drafting device, a spinning unit, and the like for explaining a yarn splicing order.

FIG. 3 is an enlarged side view of a draft device, a spinning unit and the like similar to FIG.

FIG. 4 is an enlarged side view of the same draft device and spinning unit as in FIG.

FIG. 5 is a drive timing of a winding package,
It is a drive timing chart of the drive timing of a back roller, the arrival timing of a fiber to a seed yarn, and the contact timing of a nip roller to a delivery roller.

FIG. 6 is a drive timing diagram of the drive timing of the winding package, the drive timing of the back roller, the arrival timing of the fiber to the seed yarn, and the contact timing of the nip roller to the delivery roller similar to FIG. .

FIG. 7 is a schematic side view of a spinning machine as an example to which the yarn splicing method of the spinning machine of the present invention is applied.

FIG. 8 is a drive timing chart of drive timing of the winding package, drive timing of the back roller, arrival timing of the fiber to the seed yarn, and contact timing of the nip roller to the delivery roller similar to FIG. .

FIG. 9 is a schematic side view of a spinning machine similar to FIG. 1 as an example to which the yarn splicing method of the spinning machine of the present invention is applied.

[Explanation of symbols]

 D ... Draft device E ... Yarn absorption tube H ... Yarn take-up device L ... Sliver S ...・ ・ ・ ・ Spinning unit U ・ ・ ・ ・ ・ ・ ・ ・ Yarn splicing cart W ・ ・ ・ ・ ・ ・ Winding part Y '・ ・ ・ ・ ・ ・ ・ Seed yarn h1 ・ ・ ・ ・ ・ ・ ・ ・ ・ Nip Roller h2 ... Delivery roller s1 .... Spindle member s2 ..... Nozzle member u1 ..... Yarn splicing control unit w1 .. ..Friction roller w3 ........ Winding package

Claims (3)

[Claims] 1. A yarn joining method for a spinning machine using a swirling air flow capable of separating a nozzle member and a spindle member,
A yarn splicing method for a spinning machine, wherein the drive timing of the draft roller with respect to the drive timing of the winding package is controlled according to the winding diameter of the winding package during yarn cutting. 2. After the yarn splicing, the seed yarn is taken up by rotating the winding package while keeping the nip roller away from the delivery roller.
In a yarn splicing method of a spinning machine that uses a swirling air flow in which a nozzle member and a spindle member can be separated, the timing at which a fiber reaches a seed yarn with respect to the drive timing of a winding package is set to a value when the winding package has a large diameter. The yarn splicing method for a spinning machine is characterized in that it is delayed more than in the case of a small diameter. 3. A spinning process using a swirling air flow in which a nozzle member and a spindle member can be separated from each other by bringing a separated nip roller into contact with a delivery roller to take out a seed yarn after splicing. In a yarn splicing method for a machine, a yarn having a predetermined length is stored between a winding portion and a yarn drawing device including the nip roller and the delivery roller before the yarn splicing. Machine splicing method.