JPH08325859A - Ending in open end fine spinning frame - Google Patents

Abstract

PURPOSE: To obtain an ending method in an open end fine spinning frame expectable of high success percentage of ending even performing ending in a twist coefficient higher than in a normal operation. CONSTITUTION: In this open end fine spinning frame, each spinning unit 13 has an outer rotor 13A, an inner rotor 13B provided in the outer rotor and a pulling out roller 15A at a frame base side for pulling out yarn spun from the inner rotor driven at a prescribed speed difference about the outer rotor. Yarn is spun at first twist coefficient in usual operation and is spun at second twist coefficient in higher than the first twist coefficient when the yarn is broken. In breaking of the yarn, an ending device is called out and ended yarn is pulled out by a pulling out roller 64 at the ending device side and is delivered to the pulling out roller at the frame base side. At that time, the delivery of the yarn is performed after making yarn pulling out speed of the pulling out roller in ending side substantially same as yarn pulling out speed of the pulling out roller in the frame base side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor type open end spinning machine, and more particularly to a yarn splicing method in a double rotor type open end spinning machine having an outer rotor and an inner rotor arranged therein. .

[0002]

2. Description of the Related Art Generally, in a rotor-type open-end spinning machine, a supply sliver is opened by a combing roller to separate impurities, and the fibers that have been opened are separated based on a negative pressure in a rotor that rotates at a high speed. It is transported into the rotor by the air flow generated in the transport channel. Then, the fibers transported into the rotor are converged in the fiber converging portion which is the maximum inner diameter portion of the rotor, are drawn out from the guide hole provided at the center of the navel while being twisted by the action of the rotor, and are packaged on the bobbin. It is designed to be wound up.

However, since the fiber bundles bundled in the fiber bundles are only attached to the inner wall surface of the fiber bundles by the action of the centrifugal force caused by the rotation of the rotor, the fiber bundles are rotated along the guide holes. Twist added to the drawn fiber bundle is drawn out as a thread in a state of being attached to the fiber collecting portion and propagates to the previous fiber bundle to rotate the fiber bundle in the fiber collecting portion. Therefore, there is a problem that sufficient tension cannot be obtained when twisting, and the yarn strength cannot be increased.

Therefore, in recent years, inside the outer rotor (outer rotor) having the fiber converging portion, there is provided an extraction hole for drawing out the fiber bundles converged in the fiber converging portion, and a differential rotation is performed with respect to the outer rotor. A double-rotor open-end spinning machine has been proposed, which is provided with an inner rotor (inner rotor) for performing, and spins while drafting a fiber bundle focused on a fiber focusing portion due to a difference in rotation speed between the inner rotor and the outer rotor. (JP-A-51-64
034, JP-A-5-44119, etc.).

FIG. 9 shows one spinning unit in the latter open-end spinning machine disclosed in JP-A-5-44119, which is introduced into a fiber transport channel 2 formed in an openable / closable casing 1. Sliver
After being transported to the fiber focusing portion of the outer rotor 3, the yarn is drawn out to the outside through the drawing hole of the inner rotor 4 as a yarn through the yarn drawing passage 5 and the yarn pipe 6.
In order to drive the outer rotor 3 and the inner rotor 4 arranged concentrically, the inner shaft 4a connected to the inner rotor 4 is concentric with the tubular outer shaft 3a connected to the outer rotor 3 via the bearing 9. The tangential belts 7 and 8 as drive mechanisms are disposed in contact with the intermediate portion of the outer shaft 3a and the extended portion of the inner shaft 4a, respectively. Also, the inner rotor 4 is driven.

Further, in order to obtain high productivity, the inner rotor 4 of the above-described spinning unit is operated at a high speed whose rotational speed exceeds, for example, 90,000 rpm, and the outer rotor 3 also relates to the rotational speed of the inner rotor 4. It is desired to operate at a high speed in a certain relationship.
According to the driving method of the open-end spinning frame described in JP-A-5-44119, the diameter of the fiber focusing portion is D,
When the number of revolutions of the outer rotor 3 is R ₁ and the number of revolutions of the inner rotor 4 is R ₂ , the fibers constituting the fiber bundle that is drawn out while being twisted are twisted into the yarn in a relatively straight state. In order to produce a yarn having high tensile strength and uniform thickness, the spinning speed V and the outer rotor 3 are set.
The rotation speed R ₁ and the rotation speed R ₂ of the inner rotor 4 are driven so as to satisfy the relationship of the following equation. πDR ₁ + 0.8V ≦ πDR ₂ ≦ πDR ₁ + V (1)

[0007]

Rewriting the above equation (1), it can be seen that the inner rotor 4 needs to be driven with respect to the outer rotor 3 according to the following relational equation (2). R ₁ +0.8 V / πD ≦ R ₂ ≦ R ₁ + V / πD (2) For example, the number of rotations of the outer rotor R ₁ = 60,000, the yarn count Ne = 40, the twisting coefficient k = 4.0, When the diameter D of the fiber focusing portion is 36 mm, the spinning speed V is

[Equation 1] Therefore, the inner rotor rotation speed R during steady operation
₂ (rpm) is 60,000 + 426 ≦ R ₂ ≦ 60,000 + 532 (4).

On the other hand, the yarn splicing machine is also provided with a pull-out roller for pulling out the yarn, and at the time of yarn splicing, as the number of rotations of the outer rotor 3 and the inner rotor 4 increases,
The number of rotations of this pull-out roller also rises, and the yarn is pulled out from the inner rotor 3. When the yarn is successfully drawn out, the drawn yarn is delivered to the yarn drawing roller on the main spinning machine body side at a speed managed by the driving means of the drawing roller on the yarn joining machine side.

However, in the yarn splicing process, as is well known, in order to increase the success rate of yarn splicing, yarn splicing with a higher twist coefficient is often performed even in a double rotor type spinning machine, as compared with that in steady operation. Be seen. Therefore, as before,
Number of rotations of outer rotor R ₁ = 60,000, yarn count N
When the yarn splicing is performed with a twist coefficient k = 5.2, where e = 40, the fiber bundle diameter D = 36 mm, and the spinning speed V is 46 _.
3 m / min, and the permissible range of the rotational speed R ₂ of the inner rotor 4 at this time is 60,000 + 327 ≦ R ₂ ≦ 60,000 + 409 (5) from the above equation (2), so steady operation is performed. At the time of yarn splicing, the required number of revolutions of the inner rotor 4 does not match at all.

Due to the above-mentioned circumstances, as in the conventional case,
During yarn splicing, if the yarn is delivered to the yarn drawing roller on the main body of the spinning machine at the yarn withdrawing speed that is being drawn by the yarn drawing roller of the yarn splicing machine, the yarn will be broken instantly due to the speed difference between the two drawing rollers. However, the change in the twisting coefficient for increasing the yarn splicing success rate often resulted in no success.

Therefore, an object of the present invention is to provide a yarn splicing method in an open-end spinning machine, which can expect a high yarn splicing success rate even if yarn splicing is performed with a higher twist coefficient than in steady operation.

[0012]

In order to achieve the above object, the present invention comprises a plurality of spinning units, each spinning unit being an outer rotor, an inner rotor arranged in the outer rotor, and A machine-side drawing roller for drawing the yarn spun from the inner rotor, which is driven at a predetermined speed difference with respect to the outer rotor;
In an open-end spinning machine, which has a winding means for winding the yarn spun with a twist coefficient of 1 and a spin rate of a second twist coefficient higher than the first twist coefficient when the yarn is broken. For yarn splicing, the yarn splicing machine is called at the position of the spinning unit where the yarn breakage occurred, and by the yarn splicing machine, the yarn end is captured from the winding means of the spinning unit and sent to the inner rotor, In the yarn splicing method of drawing the spliced yarn by the yarn splicing machine side pull-out roller and delivering it to the machine base side pull-out roller, in the delivery of the yarn, the yarn drawing speed of the yarn splicing machine side pull-out roller is set to the machine base. It is characterized in that it is carried out after the yarn drawing speed of the side drawing roller is made substantially the same. Advantageously, the yarn withdrawing speed of the yarn splicer side withdrawing roller is reduced, preferably at the same time after the delivery of the yarn.

[0013]

According to the present invention, at the time of yarn splicing, when the yarn is delivered from the yarn splicing machine side to the machine base side, the drawing speed of the drawing roller on the yarn splicing machine side is synchronized with the drawing speed of the drawing roller on the machine base side. Even if the twist coefficient is set to a larger value during yarn splicing than during steady operation, the yarn will not be impacted. Further, in the embodiment, since the drawing roller on the yarn splicing machine side is decelerated after or simultaneously with the passing of the yarn, the yarn sags between the drawing roller on the machine base side and the drawing roller on the yarn splicing machine side. , Large tension is not applied.

[0014]

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts. FIG. 1 is a diagram conceptually showing an example of a drive system for an outer rotor and an inner rotor in a double rotor type open end spinning machine capable of implementing the yarn splicing method according to the present invention. The spinning machine includes a plurality of spinning units 13, and each spinning unit 13
Has an outer rotor 13A driven by the tangential belt 18 and an inner rotor 13B. In the spinning machine according to this embodiment, the outer rotor 13
The rotation speed of A is detected by a well-known rotation sensor 13C, and based on the detected rotation speed and the like, the calculation unit 13D calculates an appropriate speed of the inner rotor 13B according to the above equation (2), In order to obtain speed, each inner rotor 13B is operated via the corresponding drive motor 13E. Inner rotor 13B
The number of rotations is increased by the number of rotations of the outer rotor 13A during steady operation by the number of rotations of the drawing roller 15A on the spinning machine body side, and at the time of yarn splicing, the number of rotations by the drawing roller 64 of the yarn splicer side is increased. Switching is controlled so that minutes are added.

FIG. 2 shows details of a specific example of such a drive system. In FIG. 2, the open-end spinning machine includes the above-described spinning unit 13 including a rotor assembly 11 and an opening roller (not shown), a feed roller 14 for feeding the sliver S to the spinning unit 13, and a rotor assembly 1.
A set consisting of a yarn pull-out roller 15A for pulling the yarn from 1 and each drive system roller including a yarn winding roller 17 for winding the yarn Y onto the package or the bobbin 16.
A plurality of weights (only one weight is shown in the figure as a representative) are arranged in the longitudinal direction of the machine base.

The outer shaft of the spinning unit 13 is
The endless tangential belt 18 driven by the drive motor M1 is brought into contact with the endless tangential belt 18 to be rotationally driven.
Line shafts 19, 20, 2 connected to M3, M4
1 is attached at a predetermined pitch. An inverter 22 is attached to each of these motors M1 to M4, and its speed is made variable by a command signal from a control device (arithmetic unit) 23 which may be a computer for controlling the operation of the open-end spinning machine. . The line shafts 20 and 21 are connected to the output shafts m3 and m4 of the drive motors via clutches 24 and 25, respectively, and are driven / stopped all at once. The line shaft 19 is directly connected to the output shaft m2 of the drive motor, and each feed roller 14 branches from the line shaft 19 via the gear train 29 and the clutch 26, and the clutch 2
It is configured such that it can be driven / stopped independently by operating 6 respectively. 30 is each drawing roller 15A
It is a well-known traverser provided on the shaft 31 that reciprocates in order to wind the yarn Y drawn out by the yarn around the bobbin 16.

Further, the output shafts m1, m3, m4 of the drive motors M1, M3, M4 are provided with rotation sensors 36, 27, 28 for detecting the rotation speed, and are connected to the control device 23 by signals. The spinning unit 13 described above has a well-known configuration itself, and includes an outer rotor and an inner rotor, as will be described later. It is necessary to provide a speed difference between the outer rotor and the inner rotor as described at the beginning, and keep this speed difference within a suitable range according to the equation (2).

Next, as best shown in FIG. 3, each spinning unit 13 includes an outer rotor 13A connected to the outer shaft 13a and an inner rotor 13B connected to the inner shaft 13b, and the outer shaft 13a. The tangential belt 18 described above is in frictional contact with the outer peripheral surface of the, and the inner shaft 13b described above is inserted inside the outer shaft 13a. Further, in the embodiment, the outer shaft 13a is rotatably supported by being sandwiched from below by a rotatable support disk 13d provided in pairs at two positions spaced apart in the axial direction.

Further, each spinning unit 13 shown in FIG.
In, the sliver introduced into the fiber transport channel (not shown) formed in the openable / closable casing 41 is transported to the fiber focusing portion in the maximum inner diameter portion of the outer rotor 13A, and then passes through the extraction hole of the inner rotor 13B. As the yarn, the yarn drawing passage 44 and the yarn pipe 45
Is pulled out to the outside. In order to drive the outer rotor 13A and the inner rotor 13B arranged concentrically, the tubular outer shaft 13a coupled to the outer rotor 13A is inserted with the inner shaft 13b coupled to the inner rotor 13B and extended to the outside. The drive mechanisms 46, 4 are provided on the intermediate portion of the outer shaft 13a and the extension portion of the inner shaft 13b, respectively.
7 are provided.

The drive mechanisms 46 and 47 will be described later in this embodiment as those having a structure as described in Japanese Patent Application No. 7-54517 by the present applicant. The present invention is not limited to those having such a structure, but can be applied to various other structures. In the spinning unit 13, as can be understood from FIG. 3, the drive mechanism 46 of the outer rotor 13A is arranged so as to contact the outer peripheral surface of the outer shaft 13a, and the tangential belt 18 that transmits the rotational force to the outer shaft 13a. And the outer shaft 13a are arranged at two positions axially separated from each other.
It is provided with two pairs of support discs 13d and 13d that rotatably support the 3a from below by sandwiching 3a below its axis. These supporting discs are bridged between the machine base frames 48, 48, one supporting disc for each pair being on the same side with respect to the axial center of the outer shaft 13a, coupled to each other by a rotation shaft (not shown). It is fitted and supported on the support housing 49. Each casing 50 of the rotary shaft is pressed from above by an elastic disc retainer (not shown) connected to the upper surface of the support housing 49 by, for example, bolts, whereby the casing 50 is rotated.
By extension, the support discs 13d and 13d are prevented from rising (see the above-mentioned Japanese Patent Application No. 7-54517).

Further, in FIG. 3, disposed above the tangential belt 18 is a well-known tension roller 53 whose position in at least the vertical direction can be adjusted, which can be adjusted in position on the tangential belt 18. Touch to adjust its tension.

On the other hand, the drive mechanism 47 for the inner rotor 13B is provided in the vicinity of the extension portion 13b 'of the inner shaft 13b which is concentrically inserted into the outer shaft 13a and is rotatably supported by the outer shaft 13a via an appropriate bearing. As a pair of drive rollers 47a for frictionally engaging both side surfaces of the extension 13b 'to rotate the inner shaft 13b, and a rotation shaft of each drive roller 47a as a roller driving means for driving the drive rollers. A bearing housing 47c having a bearing (not shown) therein for rotatably supporting (not shown), a drive motor 47e.
Etc. are arranged. Further, an appropriate rotation transmission means such as a timing belt 47h is stretched around the pulley 47d attached to each rotation shaft and the pulley 47g attached to the output shaft 47f of the drive motor.

A suitable drive motor 47e for rotating the drive roller 47a is mounted on a base (not shown) supported between the frames 48. Drive motor 47
By driving e to drive the timing belt 47h, each drive roller 47a is positively rotated, and the inner rotor 13B can be stably rotated. A well-known tension pulley is provided on the return side of the timing belt 47h so that the timing belt 47h
The tension of may be adjustable.

The inner shaft 13b has its tip extension 13b 'sandwiched between the drive rollers 47a, 47a which are at the same height level as the center of rotation (axial center) and the height thereof, that is, , Inner shaft 1
The shaft center of 3b and the shaft centers of the drive rollers 47a, 47a are arranged on the same plane, so that an unbalanced load does not act on the inner rotor 13B when the inner shaft 13b rotates.

Next, the rotor driving of the spinning unit having the above-mentioned rotor driving device will be explained. Regarding the outer rotor 13A, the endless tangential belt 18 which is driven by a driving motor (not shown) and runs horizontally in the embodiment is used as the outer. The outer shaft 13a is pressed by the outer peripheral surface of the shaft 13a, rotates the outer shaft 13a, and rotates the outer rotor 13A connected thereto in a known manner. At that time, the tension of the tangential belt 18 is adjusted by the tension roller 53 as desired, so that the tangential belt 18 and the outer shaft 1
You may make it hold | maintain an appropriate contact state with 3a.

On the other hand, with respect to the inner rotor 13B, which is controlled to rotate according to the above equation (2) at a predetermined speed or function preset with respect to the rotation speed of the outer rotor 13A, the drive motor 47e is controlled by the control device 23. Is operated to rotate a pulley 47g connected to the output shaft 47f, and a timing belt 47h stretched around the pulley 47g is driven to drive each drive roller 4g.
The pulley 47d coupled to the rotating shaft (not shown) of 7a is rotated. As a result, the drive rollers 47a are rotated in the same direction, and the tip extension 13 is provided between the drive rollers 47a.
The inner shaft 13b in which b'is pressed and sandwiched is rotated, and the inner rotor 13B is also stably rotated without receiving an unbalanced load. At that time, for example, the tension of the timing belt 47h is adjusted to an appropriate value by a tension pulley (not shown), and the degree of pressure contact of the drive roller 47a with the distal end extension 13b ′ of the inner shaft 13b is determined by, for example, a coil spring (not shown). It goes without saying that the adjustment may be made as desired by adjusting the above method.

Next, regarding the yarn splicing operation of the open-end spinning frame including the rotor driving device having the above-mentioned structure,
Description will be given with reference to the drawings, and in particular to FIGS. First, when a yarn breakage occurs in a certain spinning unit 13, a well-known sensor (not shown) detects the yarn breakage and outputs a yarn breakage signal, whereby the automatic yarn splicer 60 that can run along the machine base. It is called and stopped at a predetermined position in front of the spinning unit 13 where the yarn breakage occurred. Then, the outer rotor 13A is braked by a braking means (not shown) to stop the rotation of the outer rotor 13A, and the control device 2
Under the control of 3, the inner rotor 13B, which rotates following the rotation of the outer rotor, also automatically stops. Details of a device such as the yarn splicing machine 60 are described in JP-A-61-258031. Here, the device will be described within the range necessary for understanding the present invention.
An apparatus for carrying out the yarn splicing method of the present invention is disclosed in Japanese Patent Laid-Open No.
It goes without saying that the invention is not limited to the one described in JP-A 1-258031.

Thereafter, the casing 41 is opened by a yarn splicer 60 in a known manner to clean the exposed outer rotor 13A, inner rotor 13B, etc.
The casing 41 is closed. During this period, the yarn splicer 60
The bobbin drive roller 62 supported by a swingable drive arm (not shown) lifts the bobbin 16 on the machine base side from the winding roller 17 to drive the bobbin 16 in the reverse direction, and the yarn wound on the bobbin. The suction pipe 61 is sucked out by the suction pipe 61, and the suction pipe 61 is separated from the bobbin 16. Then, the yarn end is passed between the clamp roller 63 and the drawing roller 64 on the yarn splicing machine side under the action of a swingable yarn tension member 65 having a grip portion at the tip. In addition, an arm 66 supporting the clamp roller 63
The yarn end is nipped between the clamp roller 63 and the pull-out roller 64 by rotating and pressing the clamp roller 63 against the pull-out roller 64.

Next, at this time, the machine side pull-out roller 15A and the press roller 1 which are still separated from each other.
The drive roller 62 and the pull-out roller 64 are rotated in opposite directions so that the yarn end is inserted between the yarn splicing member 5B and the yarn 5B, and the yarn splicing member 67 having a grip portion at the tip is swung in a predetermined direction.
After that, the yarn end connected to the bobbin 16 is cut by a cutting member (not shown), and a new yarn end generated by the cutting is inserted into the yarn pipe 45 by a predetermined length in advance. The state at this time t1 ((B) of FIG. 8) is shown in FIG.

Here, when the brake of the outer rotor 13A is released, the rotations of the outer rotor and the inner rotor rise, but the number of rotations of the outer rotor 13A is monitored via the rotation sensor 36, and the above equation (2) is used. )
As a result, the rotation speed of the inner rotor 13B that is driven to satisfy the above condition is also monitored. Further, the yarn drawing roller 15A on the machine base side is rotating in the yarn drawing direction, as indicated by the broken line in FIG.

When the outer rotor 13A reaches a certain rotational speed R ₁₁ suitable for yarn splicing at time t2, the yarn splicing machine 6
The yarn drawing roller 64 of 0 starts to rotate in the yarn drawing direction, and during this period, the number of rotations of the yarn drawing roller 64 and the outer rotor 13A and the inner rotor 13B continues to increase. Then, at the time point t3, the outer rotor 13A reaches the steady rotational speed R ₁₂ . On the other hand, the inner rotor 13B relates to this rotation speed R ₁₂ by the above equation (4).
The rotational speed R _{21 according} to is reached. That is, the inner rotor 1
The rotation speed of 3B is the rotation speed of the outer rotor 13A + the additional rotation speed of the yarn splicing machine.

At this time t3, as can be understood from FIGS. 8A and 8B, the outer rotor has a steady rotational speed R ₁₂ = 60,000, the yarn count Ne = 40, and the twisting coefficient during steady operation. k = 4.0, fiber converging part diameter D = 36 mm
Under the condition of, the thread pull-out roller 15A on the machine side is 60.2
It rotates at a speed (drawing speed) of m / min, while the drawing roller 64 on the yarn splicing machine side rotates at 46.3 m / min when the twisting coefficient k at the time of yarn splicing is 5.2. ing.

In this way, the yarn is pulled out by the yarn drawing roller 64 driven by the drive motor 47e from the yarn joining machine side.
Is derived by the above equation (4). In order to smoothly deliver this yarn to the yarn drawing roller 15A which is controlled from the machine side, in the embodiment, the outer rotor 1 is used.
After 3A reaches the steady-state rotation speed R ₁₂ , a timer (not shown) is turned on at time t4 and the outer rotor 1
5A, the inner rotor 13B, and the yarn drawing roller 64 on the yarn joining machine side are switched from driving under yarn joining conditions to driving during steady operation. By this switching, the inner rotor 13B is driven at a rotational speed according to the equation (3) rather than the equation (4), and the pull-out roller 64 is also accelerated. At the time t5 when this timer expires, the inner rotor 13B has the above formula (3).
Has already reached the rotational speed R ₂₂ according to the above, that is, the speed of the drawing roller 64 on the yarn splicing machine side is equal to
It substantially matches the speed of A (60.2 m / min), and at this time t5, the presser roller 15B on the machine base side is pressed against the pull-out roller 15A (see FIG. 5). As a result, the yarn is smoothly delivered from the yarn splicer side to the machine base side.

On the other hand, at the time t after the above-mentioned delivery of the yarn.
At 6, the arm 66 to which the clamp roller 63 is mounted is swung upward, and the clamp roller 63 is completely separated from the drawing roller 64 on the yarn joining machine side (FIG. 6). In addition, between the time points t5 and t6, the yarn spun on the machine base side is pulled at the same speed on the yarn splicing machine side. Therefore, if there is a slight speed difference, there is a risk of developing yarn breakage.
At the time t6 in the embodiment, the yarn drawing roller 64 on the yarn splicing machine side is decelerated as soon as possible after the delivery, and spinning is performed between the drawing roller 15A on the machine stand side and the drawing roller 64 on the yarn splicing machine side. It is preferable to sag the thread to prevent thread breakage.

After that, as shown in FIG. 7, the yarn is removed from the drawing roller 64 on the yarn splicing machine base side by a known method, and the package 16 supported by the cradle 68 is lowered onto the winding drum 17 and completely removed. First, prepare the yarn for spinning on the machine side.

The invention and its various advantages will be understood from the above description. Moreover, it is obvious that the form, structure and sequence can be modified without departing from the spirit and scope of the present invention or sacrificing the important effects of the present invention, and disclosed in this specification. The form is merely a preferred or exemplary embodiment of the present invention.

[0037]

As described above, according to the present invention, at the time of yarn splicing, when the yarn is delivered from the yarn splicing machine side to the machine base side, the withdrawing speed of the drawing roller of the yarn splicing machine side is set to the machine base side. Since it is performed after synchronizing with the drawing speed of the drawing roller, even if the twisting coefficient is set higher during yarn splicing than during steady operation, no impact is applied to the yarn, so yarn breakage is reduced and the spinning machine Work efficiency is improved. Further, when the drawing roller on the yarn splicing machine side is decelerated after or at the same time as the yarn is transferred, the yarn sags between the drawing roller on the machine base side and the drawing roller on the yarn splicing machine side, and a large tension is applied. Therefore, further reduction of yarn breakage can be expected.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a drive system of an open-end spinning frame in which a yarn splicing method according to the present invention is carried out.

FIG. 2 is a detailed view of a part of the drive system shown in FIG.

FIG. 3 is an enlarged elevational view showing a drive mechanism of the spinning unit shown in FIG.

FIG. 4 is a schematic diagram illustrating a process in which the yarn splicing method according to the present invention is applied to the open-end spinning machine shown in FIGS.

5 is a schematic diagram illustrating the next process of FIG. 4. FIG.

FIG. 6 is a schematic diagram illustrating the next process of FIG. 5;

FIG. 7 is a schematic diagram illustrating the next process of FIG.

FIG. 8 (A) is a diagram showing the relationship between the drawing speed of the yarn splicer according to the present invention and the drawing speed of the machine base under yarn splicing conditions, and FIG. FIG. 6 is a diagram showing the relationship of the rotation speed of the rotor.

FIG. 9 is a partial cross-sectional view showing a spinning unit including a conventional rotor drive device.

[Explanation of Codes] 13 ... Spinning unit, 13A ... Outer rotor, 13B
… Inner rotor, 15A… Machine side drawer roller, 17
... Thread winding roller (winding means), 60 ... Thread splicing machine, 6
4 ... Pulling roller on the yarn splicing machine side.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masashi Kaneko 2-chome, Toyota-cho, Kariya city, Aichi Prefecture Toyota Industries Corp.

Claims (3)

[Claims] 1. A plurality of spinning units, each spinning unit comprising an outer rotor, an inner rotor arranged in the outer rotor, and an inner rotor driven at a predetermined speed difference with respect to the outer rotor. A machine-side draw-out roller for drawing out the taken-out thread;
In an open-end spinning machine, which has a winding means for winding the yarn spun with a twist coefficient of 1 and a spin rate of a second twist coefficient higher than the first twist coefficient when the yarn is broken. For yarn splicing, the yarn splicing machine is called at the position of the spinning unit where the yarn breakage occurred, and by the yarn splicing machine, the yarn end is captured from the winding means of the spinning unit and sent to the inner rotor, In the yarn splicing method of drawing the spliced yarn by the yarn splicing machine side pull-out roller and delivering it to the machine base side pull-out roller, in the delivery of the yarn, the yarn drawing speed of the yarn splicing machine side pull-out roller is set to the machine base. A yarn joining method in an open-end spinning machine, which is performed after the yarn drawing speed of the side drawing roller is made substantially the same. 2. The yarn splicing method according to claim 1, wherein after the delivery, the yarn withdrawing speed of the yarn splicing machine side withdrawing roller is reduced. 3. The yarn splicing method according to claim 1, wherein the yarn drawing speed of the yarn drawing machine side drawing roller is reduced simultaneously with the delivery.