JPH0921021A - Piecing and system therefor in open end fine spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piecing method and system therefor in an open end fine spinning machine, capable of mechanically dealing successfully with conventional drawbacks without the need of troublesome control operations and hopeful of high piecing successfulness even if piecing operation is conducted at a twist multiplier higher than that in stationary operation. SOLUTION: The revolutional speed difference between both outer and inner rotors is provided by a differential gear 50 both in stationary and piecing operations. When a yarn breakage occurs, the input from machine frame side to the differential gear is cut off and a piecing machine 60 is called. The piecing machine, as a surrogate, inputs a revolution in the differential gear 50 and both the rotors are imparted with a controllable revolutional speed difference from the piecing machine side. The number of revolutions for the outer rotor is monitored by a revolution sensor 37, and when the number reaches a level suitable for piecing, a yarn draw roller 64 and input shaft are actuated by driving motors 64 and 76, respectively. A yarn delivery is made following synchronizing the speed of the yarn draw roller 64 with that of the machine frame 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 and device in a double rotor type open end spinning machine having an outer rotor and an inner rotor arranged therein. Is.

[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 on the fiber converging portion which is the maximum inner diameter portion of the rotor, and are drawn out while being twisted by the action of the drawing roller from the guide hole provided in the center of the navel, 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. The twist added to the drawn fiber bundle propagates to the fiber bundle in the state where it is attached to the fiber bundle, and the fiber bundle in the fiber bundle rotates. 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. 11 shows one spinning unit in the latter open-end spinning machine disclosed in Japanese Unexamined Patent Publication (Kokai) No. 5-44119, which is introduced into a fiber transport channel 2 formed in an openable / closable casing 1. After the sliver is 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 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 outer shaft 3
A tangential belts 7 and 8 are provided as drive mechanisms in contact with the intermediate portion of a and the extension 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 manufacture a yarn having a high tensile strength and a uniform thickness, the outer rotor 3 and the inner rotor 4 are driven so that the spinning speed V satisfies the following equation. That is, the yarn drawing roller provided in each spinning unit of the machine base is driven at this speed V. πDR ₁ + 0.8V ≦ πDR ₂ ≦ πDR ₁ + V (1)

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.

[0009]

However, in the yarn splicing process, as is well known, in order to increase the yarn splicing success rate, even in the double rotor type spinning machine, the twisting coefficient is higher than that in the steady operation. Thread splicing is often done. Therefore, similarly to the above, the rotation speed of the outer rotor R ₁ = 6
50,000, yarn count Ne = 40, diameter of fiber bundle part D = 3
As 6 mm, when performing piecing at twist factor k = 5.2, the spinning speed V is _46. 3m / min, and the allowable range of the rotational speed R ₂ of the inner rotor 4 at this time, the above equation (2 From the above, since 60,000 + 327 ≦ R ₂ ≦ 60,000 + 409 (5), the range of the required rotational speed of the inner rotor 4 does not match at all during steady operation and during yarn splicing. .

Due to the above-mentioned circumstances, as in the conventional case,
At the time of yarn splicing, if the yarn is delivered to the machine side, that is, the yarn drawing roller on the spinning machine main body side at the yarn drawing speed drawn by the drawing roller of the yarn splicing machine, the speed difference between the two drawing rollers causes In many cases, yarn breakage occurred instantly, and as a result, the change in the twisting coefficient performed to increase the success rate of yarn splicing did not work.

On the other hand, in the one described in the above-mentioned Japanese Patent Laid-Open No. 5-44119, as described above, the outer rotor 3 and the inner rotor 4 are driven by frictional contact with the peripheral surfaces of the outer shaft 3a and the inner shaft 4a. The endless tangential belts 7 and 8 are separately driven by separate driving mechanisms. However, when the tangential belt is used, the higher the machine speed is, the greater the fluctuation of the tension due to the elongation of the tangential belt becomes, and the rotation speed of the outer shaft and the inner shaft also increases with the fluctuation. Since a large change occurs, the rotational speeds of the outer rotor and the inner rotor cannot be held in the relationship represented by the above-mentioned relational expression unless the belt tension is adjusted appropriately and frequently.

Therefore, in the case of using the tangential belt, it is difficult to accurately synchronize the speeds of the outer rotor and the inner rotor, and there is a drawback that the yarn quality is uneven. Therefore, the object of the present invention is to mechanically overcome such drawbacks without performing troublesome control, and it is possible to expect a high yarn splicing success rate even when yarn splicing is performed with a higher twist coefficient than in steady operation. An object of the present invention is to provide a yarn splicing method and device in an open-end spinning machine.

[0013]

In order to achieve the above object, according to the present invention, a plurality of spinning units are provided, each spinning unit including an outer rotor and an inner rotor arranged in the outer rotor. , A differential gear unit connected to the outer rotor, the inner rotor and a drive system so as to give the inner rotor a predetermined rotational speed difference during normal spinning with respect to the outer rotor, and the outer rotor is spun from the inner rotor. The machine side thread withdrawing roller for pulling out the thread and the winding means for winding up the thread spun with the first twist coefficient are provided, and at the time of yarn splicing, the thread twist roller has a lower twist coefficient than the first twist coefficient. For yarn splicing in open-end spinning machines spinning with a high second twist factor,
The yarn splicer is called at the position of the spinning unit where the yarn breakage occurred and stopped at that position, and the rotation input from the drive system to the differential gear device is cut off. When the yarn end is captured from the winding means of the spinning unit and sent to the inner rotor, the rotation is input to the differential gear device from the yarn splicer side, and the yarn is spliced between the outer rotor and the inner rotor. A predetermined rotational speed difference is applied, the rotational speed of the outer rotor is detected, the rotational speed of the yarn drawing roller on the yarn splicing machine side is controlled based on the rotational speed, and the spliced yarn is threaded on the yarn splicing machine side. The yarn is pulled out by a pull-out roller and is delivered to the machine-side draw-out roller. To do after that was the same. In this case, it is preferable to switch the rotation blocking state from the drive system to the differential gear device to the continuous state at the same time as the yarn spliced yarn is delivered to the machine side yarn drawing roller, and after or at the same time as the delivery. It is desirable to reduce the yarn drawing speed of the yarn drawing roller on the yarn joining machine side.

According to another aspect of the present invention, in order to achieve the above-mentioned object, a row of a plurality of outer rotors, a row of a plurality of inner rotors arranged in corresponding outer rotors, and the outer rotor. And a machine-side yarn drawing roller for drawing out the yarn spun by the inner rotor, a drive system for the machine-side yarn drawing roller, and a tangential belt that drives one of the outer rotor and the inner rotor, A differential gear device for holding each corresponding outer rotor and inner rotor at a predetermined rotational speed difference, and each of the differential gear devices includes a rotation of one of the corresponding outer rotor and inner rotor. And a second input means for inputting the rotation of the drive system to the same differential gear device. A yarn splicing device in an open-end spinning machine, which is connected to output means for outputting the rotations input by the first and second input means and combined in the differential gear device to the other of the outer rotor and the inner rotor. Is arranged along the row of the outer rotor and the inner rotor when the yarn splicing is performed, and the shutoff device provided to selectively shut off the input from the second input device to the differential gear device. A yarn splicing machine that moves and stops at desired outer and inner rotor positions, the yarn splicing machine having a yarn splicing machine-side yarn drawing roller driven at a predetermined speed, and the second input means. A detachably connectable input shaft, an input shaft drive motor for rotationally driving the input shaft, and a yarn drawing machine-side yarn drawing roll according to the rotation speed of the outer rotor. A detecting means for detecting the rotational speed of the outer rotor to drive is provided. The open-end spinning machine preferably has a spinning speed changing means connected to the drive system.

When a yarn breakage occurs, the rotation input from the drive system of the machine side yarn drawing roller to the differential gear device is blocked by the blocking means (clutch), and at the same time, the yarn splicing machine is called up and the yarn breakage occurs. Stop at the position of the spinning unit that awoke. In this stop position, the yarn splicer has its input shaft connected to the differential gear device instead of the drive system, so that the outer rotor and the inner rotor provide a rotational speed difference that can be controlled from the yarn splicer side. Being rotated. The rotation speed of the outer rotor is monitored by a rotation sensor (detection means), and when the rotation speed suitable for yarn splicing is reached, the rotation of the yarn drawing roller on the yarn splicer side by the roller drive motor (driving means) and the input shaft The rotation of the input shaft by the drive motor is started, and yarn splicing is performed.

After the yarn splicing, when the number of rotations of the yarn drawing roller and the input shaft reaches a predetermined number of rotations, from the yarn splicer side so that this matches the number of rotations of the machine side yarn drawing roller during steady operation. Be changed. In this way, when splicing,
The yarn transfer from the yarn splicer side to the machine base side is performed after the drawing speed of the yarn drawing roller on the yarn splicing machine side is synchronized with the drawing speed of the yarn drawing roller on the machine base side. Even if the twisting coefficient is set higher than that during operation, the yarn is not impacted. Further, preferably, when the drawing roller on the yarn splicing machine side is decelerated after or at the same time as the passing of the yarn, the yarn sags between the yarn drawing roller on the machine base side and the yarn drawing roller on the yarn splicing machine side. , Large tension is not applied.

The outer shaft extending from the outer rotor usually has two pairs of rotatable support disks which are axially separated from each other and which support the outer shaft from below. In the first, second and third embodiments, the outer shafts of the plurality of spinning units are frictionally driven by the tangential belt. Since the support disk is rotated by driving the outer shaft, this rotation is input to the differential gear device in the first embodiment. In the second embodiment, the rotation of the outer shaft is input to the differential gear device without passing through the support disk, and in the third embodiment, the rotation of the drive motor for driving the tangential belt of the outer shaft is input to the differential gear. You are typing into the device. In any case, the rotation of the drive system and the rotation on the outer shaft side are combined in the differential gear device, and the rotation according to the rotation fluctuation on the outer shaft side is output to the inner shaft extending from the inner rotor. Therefore, even if the tension of the tangential belt changes and the rotation speed of the outer shaft and thus the outer rotor changes, the inner shaft rotates at a suitable rotation speed corresponding to the change.

When the yarn count or the number of twists is changed, the spinning speed is changed. In the present invention in which the rotation of the drive system is input to the differential gear device, the rotation speed of the drive system is also changed. It is changed automatically and no special work is required to maintain a certain speed difference between the outer and inner shafts. Further, when the outer rotor and / or the inner rotor need to be cleaned in addition to the above-described thread breakage, the shut-off means (clutch) provided in the second input means is disengaged to stop the rotation of the inner rotor.

In the fourth embodiment, the inner shafts of a plurality of spinning units are frictionally driven by the tangential belt, and the inner shafts are rotated and input to the differential gear device. This rotation and the rotation of the drive system are combined in the differential gear device as described above,
The output is output to the outer shaft and then to the outer rotor. In this case as well, even if tension changes occur in the tangential belt of the inner shaft, the outer shaft is preferably driven in the manner described above.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Next, preferred embodiments of the present invention, that is, embodiments will 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 showing an example of a drive system of 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 open-end spinning machine includes a spinning unit 13 including a roller assembly 11 and a fiber-spreading roller (not shown),
Each roller of a drive system including a feed roller 14 for feeding the sliver S to the spinning unit 13, a yarn drawing roller 15A for drawing a yarn from the roller assembly 11, and a yarn winding roller 17 for winding the yarn Y on a package or bobbin 16. A plurality of weights (only one weight is shown in the figure as a representative) 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 the speed thereof is made variable by a command signal from a control device 23 which may be a computer for controlling the operation of the open-end spinning machine. Also, the line shaft 2
0 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. Line shaft 19
Is connected to the output shaft m2 of the drive motor, and each feed roller 14 is branched from the line shaft 19 via a gear train 29 and a clutch 26, and can be driven / stopped independently by operating the clutch 26. It is configured. Reference numeral 30 denotes a known traverser provided on a shaft 31 that reciprocates in order to traverse the yarn Y drawn by each yarn drawing roller 15A 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 a signal.

Each spinning unit 13 has an outer rotor 18A driven by a tangential belt 18.
And an inner rotor 13B. In the spinning machine according to this embodiment, the inner rotor 13
The rotation of B is performed with a predetermined rotation speed difference with respect to the outer rotor 13A by inputting the rotation of the drive system of the yarn drawing roller on the machine base side to the differential gear device described later, and at the time of yarn splicing, The rotation speed of the outer rotor 13A is detected by a well-known rotation sensor 37 (see FIG. 3) on the yarn splicing machine side, and based on the detected rotation speed, an arithmetic unit or control device 38 (see FIG. 3) Formula (2) above
Calculate the appropriate speed of the inner rotor 13B according to
In order to obtain this appropriate speed, the yarn splicer 60 (Fig.
The rotation of a drive motor (not shown) on the reference side is input to the differential gear device to impart a rotational speed difference during yarn splicing to the inner rotor 13B. Therefore, the rotation speed of the inner rotor 13B is equal to that of the outer rotor 13A.
The number of rotations of the yarn drawing roller 15A of the spinning machine main body side is increased by the differential gear device during steady operation, and at the time of yarn splicing, the yarn drawing roller 64 of the yarn splicing machine side (FIG. 3). The switching is controlled so that the increase in the number of revolutions according to the reference) is given.

Next, as best shown in FIG. 2, 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.

Each spinning unit 13 shown in FIG.
, A tubular outer shaft 13a coupled to the outer rotor 13A for driving the outer rotor 13A and the inner rotor 13B arranged concentrically with each other.
The inner shaft 13b coupled to the inner rotor 13B is inserted into and extends to the outside, and drive mechanisms 46 and 47 are provided at the intermediate portion of the outer shaft 13a and the extended portion of the inner shaft 13b, respectively. .

The drive mechanisms 46 and 47 will be described later in this embodiment as those having a structure as described in the specification of Japanese Patent Application No. 7-56209 filed by the present applicant. In the spinning unit 13, as can be understood from FIG. 2, 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 supported between machine base frames (not shown), with one supporting disc for each pair on the same side with respect to the axis of the outer shaft 13a being coupled to each other by a rotating shaft 57. ing.

Further, in FIG. 2, the outer shaft 1
In the vicinity of an extension 13b ′ of the inner shaft 13b which is concentrically inserted into the shaft 3a and is rotatably supported by the outer shaft 13a via an appropriate bearing, the outer shaft 13 is provided as a drive mechanism 47 for the inner rotor 13B.
A speed difference holding device 40 is provided for both a and the inner shaft 13b in operation. The speed difference holding device 40 comprises a differential gear device 50. The differential gear device 50 drives the first input means 55 for receiving an input from the outer shaft 13a and the pull-out roller 15A of the open-end spinning machine. Second input means 70 for taking an input from the system
And an output means 80 for supplying an output to the inner shaft 13b are connected.

The differential gear unit 50 has a gear box 51,
The planetary gear mechanism 52 is housed inside. The planetary gear mechanism 52 has a sun gear 52a connected to the output shaft 56 of the first input means 55, and a plurality of planetary gears 52c held by the planet carrier 52b so as to mesh with the sun gear 52a. The planet gear 52c meshes with the inner teeth of a ring gear 52d that is rotatably supported by a bearing device 52f in the gear box 51 concentrically with the output shaft 56, while the outer teeth of the ring gear 52d have a second input means. 70 gears mesh with each other. Further, the planet carrier 52b has a support rotary shaft 52 extending from the rotation center thereof.
The gear 81 of the output means 80 is supported by e. FIG.
In the above, reference numeral 32 denotes an appropriate bearing device such as a ball bearing.

Further, in FIG. 2, the first input means 55 is
Of the two pairs of support discs 13d driven by the outer shaft 13a, two support discs located on the same side in the axial direction of the outer shaft 13a are rotatably supported at their rotation centers, and an input shaft 57 and the input shaft 57. It includes a shaft 57 and a suitable coupling 58 for selectively coupling the output shaft 56 described above. In the figure, for the sake of convenience of explanation, the joint 58 aligns the axes of the input shaft 57 and the output shaft 56 in a linear arrangement and couples them, but in reality, a pulley, a gear, etc. (not shown).
It is desirable that the output shaft 56 and the input shaft 57 are eccentric by inserting.

Next, the second input means 70, in the embodiment, is driven by the line shaft 20 of the yarn drawing roller 15 via the gear train 33 provided on the line shaft 20, and the above-mentioned input shaft 72. Output shaft 7 having gear 71
3 is included. The input shaft 72 has a bevel gear 72a that meshes with a bevel gear 73a provided at one end of the output shaft 73. Further, as will be described later, the bevel gear 72a is provided in the middle of the output shaft 73 to the second input means 70 at the time of yarn splicing. In order to switch the input source of the rotation of (1), an appropriate clutch (disengagement means) 74 is inserted to completely stop the inner rotor. Output shaft 73
Extends to the outside of the gear box 51, and the spline 73b provided at the end of the gear box 51 has a spline hole 7 formed at the end of a drive shaft or input shaft 75 on the yarn splicer side, which will be described later.
It is a spline shaft that forms a spline joint in cooperation with 5a. Instead of spline joints, any other suitable rotary input means, such as a friction clutch, can be used.

The output means 80 includes a gear 81 provided on the support shaft 52e of the planetary gear mechanism 52, a gear 82 meshing with the gear 81, and an output shaft 83 for supporting the gear 82.
And The output shaft 83 extends to the outside of the gear box 51 and has a pulley 84 at its tip. A pulley 85 is also provided on an extension of the inner shaft 13b, and a rotation transmission means, which is preferably a timing belt (or V belt) 86, is stretched over both pulleys 84 and 85.

Next, the operation of the open-end spinning frame according to the present invention having the above structure will be described with reference to FIG. First, when spinning is started after the machine base is stopped, the motors M1 to M4 are started and the clutches 26, 24, 25 are sequentially connected. In this case, the starting order of the motors M1 to M4 can be set appropriately. Each motor M1 to M
4 may be started all at once, but by starting them sequentially, rapid power consumption can be suppressed. Each motor M
By the start of 1 to M4, each roller 14, 15, 17 starts to rotate and rises to a normal operating speed. Sensor 27,
28 and 36 monitor the rotation speeds of the motors M3, M4 and M1 and input this rotation speed signal to the control device 23, whereby a control command is issued to each inverter 22 and feedback control is performed.

In the open-end spinning machine, yarn splicing is performed in such a state as described later, and thereafter,
Although the steady operation is started, the tangential belt 18 that drives the rotor assembly including the outer rotor and the inner rotor may become loose during the operation, and the tension thereof may change. As described above, since the tangential belt 18 is frictionally engaged with the outer shaft 13a of the rotor assembly, if the tension change is left unchecked, the rotational speed of the outer shaft 13a and the outer rotor 13A will not be affected. A desired change may occur, and as a result, the number of rotations of the inner rotor 13B may not satisfy Expression (2) described above.

However, according to the above-described first embodiment of the present invention, the outer shaft 13a is driven by the tangential belt 18 during operation, and the inner shaft 1
3b is driven via the speed difference holding device 40. That is,
The outer shaft 13a is driven to support the support disk 13
When d is rotated, the rotation is transmitted to the sun gear 52a of the planetary gear mechanism 52 via the input shaft 57 of the first input means 55, the joint 58, and the output shaft 56. On the other hand, in order to apply the increased speed for drawing the yarn to the inner shaft 13b and then to the inner rotor 13B, the line shaft 2 of the yarn drawing roller 15 on the machine base side is provided via the gear train 33.
The rotation of the input shaft 72 of the second input means coupled to 0 is transmitted to the ring gear 52d of the planetary gear mechanism 52 via the bevel gears 72a and 73a, the clutch 74, the output shaft 73, and the gear 71. Therefore, the rotation of the outer shaft 13a and the rotation of the input shaft 72 for imparting the increased speed are combined and transmitted to the planetary gear 52c.

The rotation of the planetary gear 52c as described above is transmitted to the gear 81 of the output means 80 via the planet carrier 52b and its supporting rotary shaft 52e, and from there, the gear 82, the output shaft 83, the pulley 84, the timing belt. 8
6, the power is transmitted to the inner shaft 13b via the pulley 85, and the inner rotor 13B is rotated. The rotation of the outer shaft 13a is decelerated by the support disk 13d, and the gear ratio is set such that the deceleration amount is increased later to be offset. The same applies to the rotation of the input shaft 72.

As can be appreciated from the above description, since the outer shaft 13a and the inner shaft 13b are connected by the speed difference holding device 40 composed of a differential gear device, when the rotation speed of the outer rotor 13A changes, the It can be seen that the rotation speed of the inner rotor 13B suitably changes in response to the change automatically.

Next, the above-mentioned yarn splicing operation during spinning after the machine base is stopped will be described in detail with reference to the drawings, particularly FIGS. 3 to 7. First, when a yarn breakage occurs in a certain spinning unit 13, the yarn breakage is detected by a well-known sensor (not shown), and a yarn breakage signal is output, whereby the machine side clutch 74 (FIG. 2) is released or turned off. As well as
The automatic yarn splicing machine 60 capable of traveling along the machine base is called and stopped at a predetermined position in front of the spinning unit 13 where the yarn breakage has occurred. At this stage, the outer rotor 13A is braked to stop its rotation, and the inner rotor 13B rotating following the rotation of the outer rotor is automatically stopped. 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. Needless to say, the apparatus for carrying out the yarn splicing method of the present invention is not limited to the one described in JP-A-61-258031.

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. Then, the input shaft drive motor 76 mounted on a slide mechanism (not shown) in the yarn splicing machine 60 and the drive shaft or the input shaft 75 coupled thereto are moved toward the output shaft 73 by the slide mechanism, As a result, the above-mentioned spline joint is engaged.
During this time, the yarn splicing machine 60 lifts the bobbin 16 on the machine base side from the winding roller 17 by a bobbin drive roller 62 supported by a swingable drive arm (not shown), and reversely drives the bobbin 16. The suction pipe 61 is separated from the bobbin 16 while sucking out the yarn end of the yarn wound around the bobbin with the suction pipe 61. The thread end is a swingable thread tensioning member 6 having a grip portion at the tip.
Under the action of 5, the clamp roller 63 is passed between the clamp roller 63 and the yarn drawing roller 64 on the yarn joining machine side. Further, by rotating the arm 66 supporting the clamp roller 63 and pressing the clamp roller 63 against the yarn drawing roller 64, the yarn end is nipped between the clamp roller 63 and the yarn drawing roller 64.

Next, at this time, the driving roller 62 is inserted so that the yarn end is inserted between the yarn pulling roller 15A and the pressing roller 15B on the machine side which are still separated from each other.
While rotating the yarn drawing roller 64 in the opposite direction, the yarn splicing member 67 having the 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 not-shown cutting member (cutter), 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 point t1 ((B) of FIG. 7) is shown in FIG.

Here, when the above-mentioned brake of the outer rotor 13A is released, the rotation of the outer rotor and the inner rotor rises, but at the same time, in order to detect the number of rotations of the outer rotor 13A from the yarn splicer side, for example, As shown in FIG. 3, a rotation sensor (detection means) 37 including a reflection plate 37a having a high reflectance attached to the side surface of the support disk 13d and an optical transceiver 37b installed in the yarn splicing machine is provided. And this starts operation. The optical transmitter / receiver 37b is positioned so that the transmitted light is reflected by the reflector 37a and received by the optical transmitter / receiver 37b when the yarn splicer 60 is stopped in front of the spinning unit where the yarn breakage has occurred. It is installed in. In addition, the rotation sensor 37
Is sent to a control device 38 such as a microcomputer incorporated in the yarn splicing machine 60, and under the control of this control device 38, the yarn pulling roller 64 of the yarn splicing machine side is controlled based on the detection signal. The rotation speed of the roller drive motor (driving means) 64a is determined.

When the outer rotor 13A reaches a certain number of revolutions 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. The rotation speed of the pull-out roller 64 is detected by a rotation sensor 39 of an appropriate type, and the detection signal is sent to the control device 38 described above, and the rotation speed of the input shaft drive motor 76 is determined based on the detection signal. After being determined, the rotation of the input shaft 75 is also started. As a result, the inner rotor 13B
The rotation speed according to the yarn drawing speed of the yarn splicing machine is applied to the shaft through a speed difference holding device 40 which is a differential gear device.
Further, the yarn drawing roller 15A on the machine base side is shown in FIG.
As indicated by the broken line in FIG. Then, at the time point t3, the outer rotor 13A reaches the steady rotational speed R ₁₂ . On the other hand, the input shaft 75 also reaches a predetermined rotation speed, and the inner rotor 13B reaches the rotation speed R ₂₁ according to the above-mentioned equation (5) with respect to this rotation speed R ₁₂ . That is, the rotation speed of the inner rotor 13B 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. 7A and 7B, 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
The yarn drawing roller 64 on the yarn splicing machine side rotates at a speed (drawing speed) of m / min, while the yarn drawing roller 64 on the yarn splicing machine rotates at 46.3 m / min when the twisting coefficient k at the time of yarn splicing is 5.2. doing.

In this way, the yarn is drawn out by the yarn drawing roller 64 driven by the drive motor 64a on the yarn joining machine side according to the above-mentioned formula (5). In order to smoothly deliver this yarn to the yarn withdrawing roller 15A that is controlled from the machine side, in the embodiment, the outer rotor 13 is used.
After A reaches the steady-state rotation speed R ₁₂ , a timer (not shown) is turned on at time t4 and the outer rotor 15
A, 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 1
3B is driven at a rotational speed according to the equation (4) rather than the above equation (5), and the drawing roller 64 is also accelerated.

Therefore, at the time t5, the winding speeds of the machine base side and the yarn splicing machine side match, and after this time t5, the clutch 74 on the machine base side is engaged by the time t6 when the timer expires. Engage and operate the slide mechanism (not shown) on the yarn splicing machine side to move the input shaft 75 on the yarn splicing machine side in a direction away from the output shaft 73 of the differential gear device on the machine stand side. Thus, the engagement of the spline joint is released, and the rotation of the input shaft 75 by the drive motor 76 is stopped. At time t6, the inner rotor 13B has already reached the rotation speed R ₂₂ according to the above equation (4), that is, the speed of the drawing roller 64 on the yarn splicing machine side is the speed of the drawing roller 15A on the machine stand side.
(60.2 m / min), and at this time t6, the presser roller 15B on the machine base side is pulled out to the pull-out roller 1
5A (see FIG. 4). As a result, the yarn is smoothly delivered from the yarn splicer side to the machine base side.

On the other hand, after the above-mentioned delivery of the yarn, time t
At 7, 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. 5). In addition, between the time points t6 and t7, 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.
After delivery, as soon as possible, in the embodiment, time t7
In step 1, the yarn drawing roller 64 on the yarn splicing machine side is decelerated, and the spun yarn is slackened between the yarn drawing roller 15A on the machine base side and the yarn drawing roller 64 on the yarn splicing machine side to prevent yarn breakage. It is preferable.

Thereafter, as shown in FIG. 6, the yarn is removed from the drawing roller 64 on the yarn splicing machine base side by a well-known method, and the package 16 supported by the cradle 68 is unloaded onto the winding drum 17 and completely removed. First, prepare the yarn for spinning on the machine side. After that, the yarn splicer 60 moves to the next yarn splicing position or standby position.

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.

For example, FIG. 8 shows a second embodiment of the present invention. In the first embodiment best shown in FIG. 2, the first input means 55 controls the rotation of the support disk 13d that supports the outer shaft 13a by rotating the differential gear device 50.
Input to the sun gear 52a of the
The output rotation of is transmitted to the inner shaft 13b via the timing belt 86, but in the second embodiment, the first input means 55A is the outer shaft 13a.
Is input to the inner shaft 13b, and the output means 80A transmits it to the inner shaft 13b through gears meshing with each other.

That is, regarding the first input means 55A, the pulley 56a is fitted to the end of the outer shaft 13a, and another pulley 56b is fitted to the end of the input shaft 56.
A timing belt 56c is stretched around both pulleys 56a and 56b and drives the sun gear 52a via the input shaft 56. Further, regarding the output means 80A, the gear box 51
A gear 87a is attached to the end of the output shaft 83 inside, and the tip of the inner shaft 13b is attached to the gear box 51.
And a gear 87b that meshes with the gear 87a is mounted therein. The rest of the configuration is the same as that of the first embodiment, and the operation of the second embodiment is also substantially the same.

Next, FIG. 9 shows a third embodiment of the present invention. The difference between this embodiment and the second embodiment is that rotation is not performed from the outer shaft 13a but from the drive motor 34 of the tangential belt 18. That is, the output shaft m1 of the drive motor M1 is
A pulley 34a is mounted, and another pulley 34b is attached by a timing belt 35 stretched around the pulley 34a,
The tangential belt 18 is driven via the rotary shaft 34d and the pulley 34c, and the output shaft m1 further includes
The pulley 56d of the first input means 55B of the third embodiment is connected, and the rotation of the pulley 56d is transmitted to the input shaft 56 via the timing belt or the V belt 56f and the pulley 56e. .

Further, a fourth embodiment of the present invention is shown in FIG. In the first to third embodiments, the input to the differential gear device 50 is taken out from the outer rotor 13A side and the output is supplied to the inner rotor 13B, but in the fourth embodiment, the related elements are , And the reverse rotation transmission relationship. That is, in FIG. 10, the inner shaft 13b of the fourth embodiment is positively driven by the tangential belt 18. In order to take an input from the inner shaft 13b, the pulley 56a of the first input means 55C is attached to the end of the inner shaft 13b, and another pulley 56a is attached to the end of the input shaft 56.
b is fitted. A timing belt 56c is stretched around both pulleys 56a and 56b and drives the sun gear 52a via the input shaft 56. Regarding the output means 80B, a pulley 88a is provided at the end of the output shaft 83,
Another pulley 88b is provided on the outer shaft 13a, and the output of the differential gear device 50 is transmitted to the outer shaft 13a via a tangential belt 89 stretched over both pulleys 88a, 88b. .
In any embodiment, the input shaft 75 on the yarn splicing machine side
Is connected to the output shaft 73 of each second input means 70 via a rotation transmission member such as a spline joint.

[0052]

As described above, according to the present invention, during normal operation, the outer shaft and the inner shaft are connected by the differential gear unit, and the influence of belt tension fluctuation is exerted on the differential gear unit. Since the rotation of the yarn drawing roller side that is not received is input as the reference speed, when the rotation speed of one of the outer rotor and the inner rotor changes, the other rotation speed automatically follows the change in real time. As a result, stable spinning is possible and the yarn quality is improved. Further, even when the spinning speed is changed, such as when changing the number of twists or the number of yarns, the operator can easily deal with it without performing any special work.

Further, at the time of yarn splicing, the rotation of the input shaft driven by the driving motor on the yarn splicing machine side is input to the differential gear device instead of the drive system of the yarn drawing roller on the machine base side. At that time, since the rotation speed of the outer rotor is detected and the input shaft drive motor is controlled based on the detection signal, the above effect can be obtained even during yarn splicing, and moreover, from the yarn splicer side. Since 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 stand side, the twisting coefficient at the time of yarn splicing is higher than that during steady operation. Even if it is set, the yarn is not impacted, so that the yarn breakage is reduced and the working efficiency of the spinning machine is improved.

When the drawing roller on the yarn splicing machine side is decelerated after or at the same time as the yarn passing, the yarn sags between the drawing roller on the machine base side and the drawing roller on the yarn splicing machine side. Since a large tension is not applied, it is possible to expect further reduction of yarn breakage.

[Brief description of drawings]

FIG. 1 is a detailed view of a part of a drive system of an open-end spinning frame in which a yarn splicing method and device according to the present invention are implemented.

FIG. 2 is an enlarged vertical sectional view showing a drive mechanism of the spinning unit shown in FIG.

FIG. 3 is a schematic diagram illustrating one process in which the yarn splicing method and device according to the present invention are applied to the open-end spinning frame shown in FIGS. 1 and 2 by using a yarn splicing machine.

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

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 (A) is a diagram showing the relationship between the drawing speed on the yarn splicing machine side and the drawing speed on the machine side under the yarn splicing condition, and FIG. 7 (B) is an outer rotor according to the present invention. FIG. 6 is a diagram showing the relationship between the rotation speed of the inner rotor and the rotation speed of the inner rotor.

8 is a vertical cross-sectional view showing a modified embodiment of the drive mechanism in FIG.

FIG. 9 is a vertical cross-sectional view showing another modified embodiment of the drive mechanism shown in FIG.

10 is a vertical cross-sectional view showing another modified embodiment of the drive mechanism shown in FIG.

FIG. 11 is a partial cross-sectional view showing a spinning unit including a conventional rotor drive device.

[Explanation of symbols]

13 ... Spinning unit, 13A ... Outer rotor, 13B
... Inner rotor, 15 ... Machine stand side thread drawing roller, 17
... yarn winding roller (winding means), 18 ... tangential belt, 20 ... line shaft (drive system), 21 ...
Line shaft (driving system), 22 ... Inverter (changing means), 37 ... Rotation sensor (detecting means) for detecting the rotation speed of the outer rotor, 38 ... Control device, 40 ... Speed difference holding device, 50 ... Differential gear device , 55 ... First input means, 6
0 ... Thread splicing machine, 64 ... Thread splicing machine side thread drawing roller, 64
a ... roller drive motor, 70 ... second input means, 72 ...
An input shaft in the drive system of the yarn drawing roller, 74 ... Clutch (disengaging means), 75 ... Input shaft in the yarn splicing machine, 76 ... Input shaft drive motor, 80 ... Output means, Y ... Yarn.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noriaki Miyamoto 2-chome, Toyota-cho, Kariya city, Aichi stock company Toyota Industries Corp.

Claims (6)

[Claims] 1. A plurality of spinning units, each spinning unit including an outer rotor, an inner rotor arranged in the outer rotor, and a predetermined rotational speed difference during normal spinning with respect to the outer rotor. A differential gear device connected to the outer rotor, the inner rotor, and a drive system so as to provide a machine base side yarn drawing roller for drawing the yarn spun from the inner rotor, and a first twist coefficient. And a winding means for winding the yarn spun in, and at the time of yarn splicing, the yarn splicing in an open-end spinning machine spinning at a second twist coefficient higher than the first twist coefficient Therefore, the yarn splicer is called to the position of the spinning unit where the yarn breakage occurred and stopped at the position, and the rotation input from the drive system to the differential gear device is performed. And then the yarn splicer captures the yarn end from the winding means of the spinning unit and sends it to the inner rotor, and inputs rotation to the differential gear device from the yarn splicer side. A predetermined rotational speed difference at the time of yarn splicing is applied between the outer rotor and the inner rotor, the rotational speed of the outer rotor is detected, and the rotational speed of the yarn drawing roller on the yarn splicing machine side is controlled based on the rotational speed. , The yarn spliced yarn is pulled out by the yarn splicing machine side thread withdrawing roller, and is delivered to the machine base side thread withdrawing roller. The delivery of the yarn is performed by changing the yarn withdrawing speed of the yarn splicing machine side yarn withdrawing roller to the machine base. A yarn joining method in an open-end spinning machine, which is performed after the yarn withdrawing speed of the side yarn withdrawing roller is made substantially the same. 2. The rotation cutoff state from the drive system to the differential gear device is switched to a continuous state at the same time when the yarn spliced yarn is delivered to the machine side yarn drawing roller. The splicing method described. 3. The yarn splicing method according to claim 1, wherein after the delivery, the yarn drawing speed of the yarn drawing roller on the yarn joining machine side is reduced. 4. The yarn splicing method according to claim 1, wherein the yarn drawing speed of the yarn drawing roller on the yarn joining machine side is reduced simultaneously with the delivery. 5. A row of a plurality of outer rotors, a row of a plurality of inner rotors arranged in corresponding outer rotors, a machine side yarn for drawing out the outer rotor and the yarn spun by the inner rotor. Withdrawal roller,
A drive system for the machine side yarn drawing roller, a tangential belt for driving one of the outer rotor and the inner rotor, and a differential for holding the corresponding outer rotor and inner rotor at a predetermined rotational speed difference. A gear unit, wherein each of the differential gear units includes first input means for inputting rotation of one of the outer rotor and the inner rotor corresponding thereto to the differential gear unit; Second for inputting rotation to the same differential gear
An open-end spinning machine in which input means and output means for outputting the rotation input by the first and second input means and combined in the differential gear device to the other of the outer rotor and the inner rotor are connected. A splicing device for selectively splicing the input from the second input means to the differential gear device during splicing, and the outer rotor and the inner portion during splicing. A yarn splicing machine that moves along a row of rotors and stops at desired outer rotor and inner rotor positions, and the yarn splicing machine includes a yarn splicing machine side yarn drawing roller that is driven at a predetermined speed; An input shaft detachably connectable to the second input means, an input shaft drive motor for rotationally driving the input shaft, and a yarn splicing according to the rotation speed of the outer rotor. A detecting means for detecting the rotational speed of the outer rotor to drive the side yarn pulling rollers are provided, the yarn splicing device. 6. The yarn splicing device according to claim 5, wherein the open-end spinning frame has a spinning speed changing device connected to the drive system.