JPH10305963A - Yarn winding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To completely prevent a defective package in which an abnormality is generated during the winding operation from flowing into the post-process without changing the measurement value by the yarn quality and the yarn speed or without generating any error by measuring the transmission speed of the transverse wave in the traveling yarn during the winding operation, and controlling the winding condition based on the transmission speed. SOLUTION: A detector 3 detects the movement of a traverse guide 10, and a photoelectric sensor 4 detects the yarn provided between a swing fulcrum 1 and the traverse guide 10. A time difference detection circuit 5 detects the time difference based on the transmitted signal from the detector 3 and the photoelectric sensor 4. An operating means 6 calculates the transverse wave transmission speed based on the time difference, and informed to a worker by a CRT, etc., for display. The observation can be achieved without interposing the unstable friction different from the conventional method for measuring the tension, and the measurement value including no error by the change of the friction resistance caused by the yarn traveling speed, can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of winding a yarn in a synthetic fiber yarn manufacturing facility or the like.

[0002]

2. Description of the Related Art Generally, in the winding process of a synthetic fiber yarn, the optimum winding tension differs depending on the thickness of the yarn to be wound, the speed at which the yarn is fed out, and the type of yarn.

If the winding tension is too high, the bulge, called a bulge, on the side of the wound package becomes large,
There is a problem that the swollen portion is rubbed when the wound package is packed and transported, so that the yarn cannot be unwound in a subsequent process. In addition, if the dent at the center of the outer peripheral surface of the package, called a saddle, becomes large, there is a problem that a difference in yarn quality occurs between the central portion and both ends of the outer peripheral surface of the package, and dye spots occur. Furthermore, if the tension is too high, the stress inside the package will increase, and a fault called a spiral, in which the yarn layer is displaced, will reduce the stress. There is a problem that the deformation becomes large and the package cannot be removed from the winder.

[0004] On the other hand, if the winding tension is too low, the running of the yarn becomes unstable, and one or several single yarns forming the yarn are separated by a guide portion which regulates the running of the yarn to form a loop. And the quality of the yarn is degraded. Further, there is a problem that the density of the package is reduced and the predetermined shape cannot be maintained, so that the package collapses during winding, or collapses during transportation to a subsequent process, and becomes unusable. In addition, since the binding force of the yarn is low, a phenomenon that a part of the yarn is shifted to the center of the package in the middle layer portion of the package during winding occurs, and there is a problem that the portion cannot be unwound.

[0005] In order to avoid the above-mentioned problems caused by inappropriate winding tension, test winding is usually performed to search for a tension at which the wound package has an optimum shape, and to generate the tension. The required winding speed is determined.

However, if the determined winding speed is always maintained, the optimum winding state cannot be maintained permanently. However, changes in room temperature and humidity, slight fluctuations in the viscosity of the raw material polymer, and temperature conditions during the process are not possible. Even if the winding speed is the same, the winding tension deviates from the optimum value due to the influence of fluctuations, wear of the yarn path regulating parts, and the like, causing the above-described problem.

Therefore, in the yarn winding step, the winding state is always or periodically measured for any abnormality in the winding state.
On the basis of the measured information, it is necessary to correct winding conditions, spinning conditions, equipment conditions, and the like, and to perform management such as determining the quality rank of the wound package.

Conventionally, there are two methods for managing the winding state of a yarn. One method is to measure the shape and winding density of a package to be wound, and the other is to measure the tension during winding constantly or periodically. How to manage.

The former method of measuring the shape and winding density of a package has a problem that even if an abnormality occurs, the package is rolled up and the abnormality cannot be found until the appearance is inspected or the winding density is measured. Further, an abnormality that occurs only during an extremely short time cannot be found only by visual inspection of the package, and there is a problem that a defective package is mixed in a subsequent process. Further, there is a problem that when a large tension abnormality occurs suddenly, it is not possible to prevent an accident in which the package being wound is broken.

In the latter method of managing the yarn tension during winding by constantly or periodically measuring, the tension is constantly measured and the winding speed is actively controlled so that the tension becomes substantially constant. A tension control winding method has been put to practical use.

As means for measuring the tension, a movable guide 63 is provided between two fixed guides 61 and 62 as shown in FIG.
A three-point tensiometer is used in which the amount of deflection (the amount of deflection) is detected by a strain gauge or a displacement gauge 64 such as a strain gauge, and a tension signal corresponding to the amount of movement of the movable guide is output.

However, since the three-point tensiometer does not detect the absolute value of the tension, it must always be calibrated. Ideally, the three-point tensiometer is a yarn traveling at a speed of 3000 m / min or more for measuring the tension. It should be performed, but it is actually difficult to run the yarn in a stable state with a predetermined reference tension for calibration. Therefore, in general, calibration is performed by adjusting the weight of the yarn in a state where the weight in the measurement range is suspended in a static state without running the yarn and the measured value using a tension meter.

However, in a static calibration, a tensiometer showing the same value often shows a different value when measuring a running yarn. The cause is due to the difference in the coefficient of friction between the yarn and the guide due to slight differences in the surface condition, shape and position of the guide of the tension meter, the thickness of the yarn to be measured and the quality of the yarn, and the difference in the appearance of the effect. Things.

Therefore, even if the tension meter of the same principle is used, the measurement value of the tension of the running yarn is different due to the difference in the manufacturing accuracy at the time of manufacture, and there is no compatibility. Further, the measurement value changes with time due to the wear of the guide. I do.

[0015]

As described above, since the displayed values of the tensiometer are not interchangeable, even if an optimum tension value is found in advance by a test winding, the numerical value is a specific value of the tensiometer measured at that time. The optimal value for different tensiometers is unknown. In addition, in order to maintain the winding state of the entire factory continuously and with high accuracy over a long period of time, multiple tension meters must be used. Due to the change, it can be evaluated as a true abnormality only when a large tension abnormality occurs, and therefore, there is a problem that a defective package cannot be completely prevented from flowing to a subsequent process.

Further, in the above-described tension control winding method, the true tension of the yarn actually wound differs due to the variation of the tension meter, so that the shape of the package wound by the plurality of winding machines is uniform. There is a problem that the shape is not optimal.

The present invention varies between multiple measuring means,
There is no change over time, the measured value does not change or error occurs depending on the yarn quality and yarn speed, and it is possible to completely prevent the defective package in which an abnormality occurred during winding from flowing to the subsequent process. It is an object to provide a winding method.

[0018]

According to a first aspect of the present invention, there is provided a yarn winding method for measuring a transmission speed of a transverse wave of a traveling yarn during winding, and winding the yarn based on the transmission speed. It is characterized by managing the state.

The transmission speed of the shear wave of the traveling yarn is an observed value of the propagation speed of the shear wave transmitted through the traveling yarn.

Further, in the yarn winding method, the transverse wave transmission speed of the running yarn during winding is 40 to 70.
The winding speed is controlled so as to be in the range of m / s.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention describes in detail the relationship between the behavior of a yarn reciprocating in a direction substantially perpendicular to the running direction by a traverse device in the width of a package and the shape of the package in winding a synthetic fiber. As a result of the research, they have found that there is a close relationship between the shear wave transmission speed at which the shear wave generated by the traverse device is transmitted upstream in the running direction of the yarn and the shape of the package.

The transverse wave transmission speed mentioned here is the speed of movement of the displacement of the yarn in the direction perpendicular to the running direction of the yarn in the running direction of the yarn.

FIG. 1 shows a first embodiment of the configuration of a shear wave transmission speed measuring device for measuring the shear wave transmission speed in the winding method of the present invention based on the transmission speed of the shear wave generated by the traverse device of the yarn winding machine. FIG. 3 is a schematic system diagram showing a traverse device 2 including a swing support guide 1, a traverse guide 10 which reciprocates by engaging with a scroll cam roller 9 rotated by an electric motor 8 as shown in FIG. 10, a photoelectric sensor 4 for detecting a thread provided between the swinging fulcrum guide 1 and the traverse guide 10, and a transmission signal from the detector 3 and the photoelectric sensor 4. A time difference detection circuit 5 for detecting a time difference based on the time difference; a calculating means 6 for calculating a shear wave transmission speed based on the time difference from the time difference detection circuit 5; CRT for display to inform the operator is constituted by an output interface 7 to a printer or the like (not shown) is connected to print the data.

The traverse guide 10 and the detector 3 are installed so as to have a predetermined distance [L (mm)]. The detector 3 uses a capacitance type sensor, a photoelectric sensor, or the like.

Although the traverse guide 10 may be directly detected by the detector 3 as described above, a plurality of traverse guides 10 are connected so as to have the same phase as indicated by a dashed line in FIG. If the detection piece 11 is attached to the portion and the detection piece 11 is detected by the detector 3, it is economical and the configuration can be simplified.

The above-described traverse device 2 has a pulley 14 in which a plurality of traverse rotary blade units 12 as shown in FIGS.
Can be used that are simultaneously rotated by the belt 15 driven by the belt. In this case, the pulley 14
Is provided with a detection piece 16 and detected by a detector 17.

The photoelectric sensor 4 is mounted on a casing 21 such that a light emitting element 18 and a light receiving element 19 having an amplifier 20 as shown in FIG. 5 have a predetermined angle with respect to the yarn running path 100a. A reflection-type photoelectric sensor in which lenses 22 and 23 are provided in a light emitting unit and a light receiving unit,
Alternatively, the light emitting element 24 and the amplifier 2 as shown in FIG.
The light receiving element 25 having the line 6 is a thread running path (slit) 2
One of the transmissive photoelectric sensors attached to the casing 27 so as to sandwich 7a is used.

In the shear wave transmission speed measuring device as shown in FIG. 1 described above, the detection of the traverse guide 10 by the detector 3 moves the traverse guide 10 from the point (C ') to the point (B'). The signal is output when passing through the point (A '). The traverse guide 1
When 0 moves from the point (B ') to the point (C'), no transmission signal is output.

The yarn 100 in the photoelectric sensor 4 is detected in a state as shown in FIG. 7 between the points (C) and (A).

At this time, the transverse wave is transmitted when the traverse guide 10 moves in the direction (a).
When the traverse guide 10 moves in the direction (b), the state shown in FIG. 16 is obtained.

At this time, the output waveform from the detector 3 and the input waveform to the photoelectric sensor 4 have a relationship as shown in FIG.

In the above-described time difference detection circuit 5, the detector 3
(T) from when the transverse wave is transmitted to the photoelectric sensor 4
When 5) is detected, the calculating means 6 calculates the shear wave transmission speed and outputs it to the CRT and the printer. The shear wave transmission speed [V (m)] is calculated by the following equation.

V (m / s) = L (m) / t5 (s) Since [L (m)] is a fixed value, it is simply (t5)
Can be used as a substitute for the shear wave transmission speed.

Instead of the detector 3 for detecting the phase of the yarn guide portion of the traverse guide 10 in the traverse device 2 described above, a second photoelectric sensor is provided between the photoelectric sensor 4 and the traverse guide 10 as shown in FIG. The sensor 28 is installed so as to have an interval dimension [L (m)] with the photoelectric sensor 4, and an apparent shear wave transmission speed is calculated based on signals transmitted from the second photoelectric sensor 28 and the photoelectric sensor 4. You can also

In this case, it can be carried out without modifying the traverse device of the existing winding machine.

Also, an upper limit value and a lower limit value are determined for the measured shear wave transmission speed, and when the shear wave transmission speed exceeds the values, a buzzer sounds or a red or yellow lamp is turned on to issue an alarm. It may be. Further, a standard deviation of the shear wave transmission speed may be calculated, and an alarm may be issued when the standard deviation value exceeds a predetermined value.

[0037]

EXAMPLE 1 Table 1 shows the relationship between the state of the package shape of various yarns and the transverse wave transmission speed.

[0038]

[Table 1] Table 1 shows that the polyester POY120d-36f, 2
40d-48f, a polyester FDY which is a yarn manufactured by a direct drawing method of directly heating and drawing continuously from spinning.
75d-36f, polyester HOY75 which is a high-speed spun yarn directly wound at a speed of 6000 m / min or more from the spun yarn.
The transverse wave transmission speed and the state of the package shape for each winding speed of the d-36f and the nylon industrial yarn 1500d are described.

As is clear from Table 1, the respective process speeds are greatly different from 3300 m / min to 6000 m / min, and the fineness is also greatly different from 75 d to 1500 d, but the usable package can be wound. The shear wave transmission speed is between 40 m / s and 70 m / s.

That is, when the shear wave transmission speed was higher than 70 m, the saddle and the spiral became large, and when it was lower than 40 m / s, the bulge became large and the yarn was skewed and the package collapsed.

From the above results, it was determined that the present invention can be used in place of the conventional control of the winding state by measuring the tension.

From the above results, the optimum shear wave transmission speed V (m
/ S) may be in the range of the following empirical formula (1) as a function of the winding speed v (m / s) regardless of the yarn thickness.

4.3v0.765−v <V <5.1v0.765−v ‥‥ (1) More preferably, the winding speed is set to be close to the transmission speed as shown by the empirical formula (2). Good to do.

V = 4.7v0.765−v ‥‥ (2) From these, the measurement range is from 35 m / s to 75 m / s.
That is all.

FIG. 10 is a schematic system diagram showing a third embodiment of the configuration of the shear wave transmission speed measuring device in the winding method of the present invention. Vibrating means 30 for providing a transverse wave to the installed running yarn, measuring means 31 for measuring an apparent transverse wave transmission speed given to the yarn, and an output interface for outputting the transverse wave transmission speed to an operator or a controller 42.

The vibrating means 30 includes a guide 32 having a U-shaped yarn path 32a as shown in FIG. 11, and a machine frame (see FIG. 11) so that the U-shaped yarn path 32a is positioned on the yarn traveling path. (Not shown), and a piezoelectric element 33 for exciting the guide, which connects the guide 32 and the bracket 34.
And an oscillation circuit 3 for inputting a predetermined oscillation signal to the gate 37
5 and an intermittent signal so that an oscillation signal is output from the gate 37 to the piezoelectric element 33 at a predetermined interval.
Is constituted by a multivibrator 36 for inputting to the.

The above-mentioned measuring means 31 is based on a transverse wave detecting means 38 for detecting a transverse wave applied by the vibration means 30 and a time until the transverse wave provided by the vibrating means 30 is detected by the transverse wave detecting means 38. And a signal processing unit 39 for outputting an apparent shear wave transmission speed.

The signal processing section 39 includes a time difference detection circuit 40 for detecting a time difference from the detection signal from the shear wave detection means 38 and a transmission signal from the multivibrator 36, and a shear wave transmission based on the time difference from the time difference detection circuit 40. It comprises an arithmetic circuit 41 for calculating the speed and an output interface 42.

The transverse wave detecting means 38 includes a guide 43 having a U-shaped yarn path as in the case of the vibrating means 30, and a machine frame (not shown) so that the U-shaped yarn path is positioned on the yarn running path. ), And a guide vibrating piezoelectric element 44 for connecting the guide 43 and the bracket 45.

The transverse wave detecting means 38 and the vibration means 30 are installed so as to have a predetermined distance [L (mm)].

An input keyboard 46, a display CRT 47, a printer 48 for printing data, and the like are connected to the output interface 42 as required. Further, a buzzer, a lamp, and the like, which are alarm means, can be connected.

The output interface 42 may be connected to a plurality of signal processing units.

The tension measuring operation of the above-described yarn tension measuring device will be described.

While the yarn 100 is running, an oscillating signal of 30 to 40 KHz is input from the oscillating circuit 35 to the gate 37, and the multivibrator 36 outputs a signal of 20 to 50 kHz.
When an intermittent signal [t1, t2 (ms)] of msec is input, an oscillation signal is output from the gate 37 to the piezoelectric element 33.

At this time, the output waveform from the multivibrator 36 and the output waveform from the gate 37 to the piezoelectric element 33 have a relationship as shown in FIG.

The intermittent signals (t1, t2) from the multivibrator 36 are simultaneously input to the time difference detection circuit 40.

When the guide 32 vibrates by operating the piezoelectric element 33 based on the oscillation signal from the gate 37, the running yarn 100 is moved by the guide 32 at predetermined intervals (t1, t).
Vibrated with 2).

Then, the oscillating running yarn 100 moves to the position of the transverse wave detecting means 38, and the running yarn 100 comes into contact with the guide 43, the piezoelectric element 44 operates, and the intermittent reception signal is transmitted to the time difference detection circuit 40. , The time difference [t3, t4 (ms)] shown in FIG. 13 is detected from the received signal and the transmission signal from the multivibrator 36 and output to the arithmetic circuit 41.

At this time, the relationship between the time differences t3 and t4 is t3 <
t4, and t3 is the longitudinal wave transmission time transmitted through the yarn,
Since t4 is the shear wave transmission time and the function of the tension is the shear wave speed, t4 is output to the arithmetic circuit 41 as a measured value.

Then, based on the shear wave transmission time (t4) and the distance [L (m)] between the vibrating means 30 and the shear wave detecting means 38 in the arithmetic circuit 41, the apparent shear wave transmission speed is determined in the first embodiment. It is calculated as in the example.

The vibrating means is not limited to the piezoelectric element, but may be used as long as it has a function of generating vibration according to an input signal.

[0062]

Example 2 The shear wave transmission speed was measured by the above-described means. Oscillation signal value from oscillation circuit 35: 30 KHz Intermittent signal value from multivibrator 36: 0.020 s Dimension (L) between vibration means 30 and shear wave detection means 38: 0.1 m Similar to the example. Therefore, unlike the conventional method of monitoring the winding state of the yarn by measuring the tension, it can be understood that the present invention has high compatibility regardless of the measuring means.

In the above-described embodiment, the shear wave transmission speed from the downstream to the upstream in the running direction of the yarn is measured, but the transmission speed of the shear wave from the upstream to the downstream may be measured. Subtracting twice the running speed of the yarn from the traveling shear wave transmission speed results in the upstream shear wave transmission speed.

FIG. 14 shows the relationship between the winding speed and the transverse wave transmission speed when the yarn sending speed is 4700 m / min in the polyester FDY 75d-36f. It can be seen from FIG. 14 that when the winding speed increases, the shear wave transmission speed also increases.

Thus, by adjusting the winding speed, the shear wave transmission speed can be adjusted to an optimum value. The winding speed may be automatically adjusted based on the shear wave transmission speed.

FIG. 18 is a schematic system diagram showing a fourth embodiment of the shear wave transmission measuring device in the yarn winding method of the present invention. The shear wave transmission measuring device is different from the shear wave transmission measuring device of the first embodiment. Similarly, a traversing guide 10 serving as a vibrating means, a detector 3 for detecting that the traversing guide 10 has reached the moving end (C '), and a sensor 3 are provided between the traversing guide 10 and the swing supporting point guide 1. Reflected photoelectric sensor 4,
A time difference detection circuit 5 for detecting a time difference based on a transmission signal from the reflection type photoelectric sensor 4;
Calculating means 6 for calculating the apparent shear wave transmission speed based on the time difference from the transmission speed, and calculating the tension from the transmission speed, the yarn running speed and the fineness inputted in advance, and a display for notifying the operator of the calculated tension. And a reflection type photoelectric sensor 4 swings along the trajectory (B ')-(C') of the traverse guide 10. A reflection-type photoelectric sensor that emits light from the outside on a plane substantially parallel to the plane of movement of the yarn path connecting the fulcrum guide 1 toward the yarn side (from a direction substantially parallel to the plane of movement of the yarn path). 4
Is provided.

The reflection type photoelectric sensor 4 has a configuration including a light projector 4a, a light receiver 4b, a signal amplifier (not shown), and a comparison circuit.

In winding the yarn, the traverse guide 1
In the traverse end portion (B '), the traverse end portion (B') accelerates and performs a substantially constant-velocity motion when it reverses. The shape of the transverse wave propagating upstream due to this rapid reversal has a curvature that connects the constant velocity moving part from (B ′) to (C ′) and the constant velocity moving part from (C ′) to (B ′). It becomes a small bent portion (D) and rises toward the swing guide 1.

For this reason, as shown in FIG. 19, the reflection type photoelectric sensor 4 is configured such that the light projecting device 4a and the light receiving device 4b are arranged such that the reflected light and the light Are located substantially on the same line, the light receiving amount increases, and the bent portion (D) and the traverse guide 10 (A)
As shown in FIG. 20, the angle is set so that the reflected light and the light receiver 4b are not located on the same line with respect to the yarn path connecting the positions and the amount of received light is small.

The distance (δ) between the bent portion (D) and the reflective photoelectric sensor 4 is determined by the light emission of the light emitter 4a and the light receiver 4b.
Even if it changes within the light receiving range (E), the signal after passing through the bent portion (D) surely changes in a smaller direction than the signal before passing through the bent portion (D). Output, the passage timing of the bent portion (D) can be reliably detected.

The bent portion (D) and the reflection type photoelectric sensor 4
FIG. 2 shows the relationship between the input signal level and the output signal in the photodetector 4b when the distance (δ) from the optical receiver 4 is 6 mm and 10 mm.
As shown in FIG.

The relationship between the output of the detector 3 and the output of the reflection type photoelectric sensor 4 is as shown in FIG.

The distance between the detector 3 and the bent portion (D)
In the case of [L (m)], the time from the output of the detector 3 to the output of the reflective photoelectric sensor 4 [t5 (sec)]
Is measured, and the apparent shear wave transmission velocity [V0 (m / se
c)] is calculated by the following formula.

V0 = L / t5 (m / sec) According to this configuration, even if the distance between the reflective photoelectric sensor 4 and the yarn path changes, the apparent shear wave transmission speed [V0 (m / sec)
c)] can be calculated, as compared with the case where the photoelectric sensor is installed so as to project light toward the moving plane of the yarn path as in the first to third shear wave transmission measuring devices described above. More accurate detection is possible.

The yarn is guided by a convex guide guide in a direction perpendicular to the traverse movement direction between the turning point (B ') and the turning point (C') in the above-described movement of the traverse guide. In the case of a rotary vane type traverse device as shown in (1), the yarn path measured by the reflective photoelectric sensor 4 is displaced in a direction orthogonal to the traverse movement direction due to a change in tension due to a change in tension. There is. In such a case, by providing at least one of the light emitter 4a and the light receiver 4b of the reflective photoelectric sensor 4, the detection width in the direction orthogonal to the traverse movement direction can be increased, and the bent portion (D ) Can be detected.

[0076]

The yarn winding method according to the present invention measures the transmission speed of the transverse wave of the running yarn during winding and manages the winding state based on the transmission speed. In this method, unstable friction can be observed without intervening, and a measurement value that does not include an error due to a change in frictional resistance due to the yarn running speed can be obtained.

Further, since the yarn winding method of the present invention has high compatibility and does not change with time, the winding state of the package of the entire factory is continuously performed over a long period of time in a large number of yarn manufacturing facilities installed in the factory. In addition, it can be managed with high accuracy, and it is possible to completely prevent the occurrence of an abnormality during winding and the defective package from flowing to the subsequent process.

Further, when the winding speed is controlled using the measurement result of the shear wave transmission speed of the yarn winding method of the present invention, the shapes of the packages wound up by a plurality of winding machines are uniformly optimized. be able to.

In the yarn winding method, the traveling speed of the transverse wave of the running yarn during winding is 40 to 70 m / s.
If the winding speed is controlled so as to fall within the range, a package having a good winding shape without saddles or bulges can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic system diagram showing a first embodiment of a shear wave transmission speed measuring device in a yarn winding method according to the present invention.

FIG. 2 is a schematic diagram showing an outline of a first embodiment of the traverse device in FIG. 1;

FIG. 3 is a schematic diagram showing a second embodiment of the traverse device.

FIG. 4 is a view of the oscillation signal output unit in FIG.

FIG. 5 is a schematic diagram showing a first embodiment of the photoelectric sensor.

FIG. 6 is a schematic view showing a second embodiment of the photoelectric sensor.

FIG. 7 is a schematic diagram showing details of a yarn detection state.

FIG. 8 is a schematic diagram illustrating a relationship between an output waveform from a detector and an output waveform from a photoelectric sensor.

FIG. 9 is a schematic system diagram showing a second embodiment of the shear wave transmission speed measuring device in the yarn winding method of the present invention.

FIG. 10 is a schematic system diagram showing a third embodiment of a shear wave transmission speed measuring device in the yarn winding method according to the present invention.

FIG. 11 is a schematic perspective view showing a second embodiment of the vibration means.

FIG. 12 is a schematic diagram illustrating a relationship between an interval signal from a multivibrator and a transmission signal output from a gate to a piezoelectric element.

FIG. 13 is a schematic diagram illustrating a relationship between a reception signal from a shear wave detection unit and a transmission signal from a multivibrator.

FIG. 14 is a graph showing a relationship between a winding speed and a shear wave transmission speed in polyester FDY75d-36f.

FIG.

FIG.

FIG. 17 is a schematic view showing a transmission state of a shear wave.

FIG. 18 is a schematic system diagram showing a fourth embodiment of a shear wave transmission speed measuring device in the yarn winding method according to the present invention.

19 is a schematic diagram showing a relationship between a reflection type photoelectric sensor and a yarn path connecting the swinging fulcrum guide 1 and the bent portion (D) in FIG. 18;

FIG. 20 is a schematic diagram showing a relationship between a reflection type photoelectric sensor and a yarn path connecting a bent portion (D) and a position (A) of the traverse guide 10 in FIG.

21 is a schematic diagram showing a relationship between a distance between a bent portion (D) and a reflective photoelectric sensor in FIG. 18 and an input signal level and an output signal of a light receiver in the reflective photoelectric sensor.

FIG. 22 is a schematic diagram showing the relationship between the output of the detector in FIG. 18 and the output signal of a reflective photoelectric sensor.

FIG. 23 is a schematic perspective view showing one embodiment of the configuration of a conventional three-point tensiometer.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 swing support guide 2 traverse device 3, 17 detector 4 photoelectric sensor 5, 40 time difference detection circuit 6, 41 calculating means 7, 42 output interface 8, 13 electric motor 9 scroll cam roller 10 traverse guide 11, 16 detection piece 12 rotating blade Unit 14 Pulley 15 Belt 18, 24 Light emitting element 19, 25 Light receiving element 20, 26 Amplifier 21, 27 Casing 22, 23 Lens 28 Second photoelectric sensor 30 Vibration means 31 Measuring means 32, 43 Guide 33, 44 Piezoelectric element 34 , 45 bracket 35 oscillation circuit 36 multivibrator 37 gate 38 shear wave detecting means 39 signal processing unit 46 keyboard 47 CRT 48 printer 21a U-shaped thread path

Claims (2)

[Claims] 1. A yarn winding method comprising: measuring a transmission speed of a transverse wave of a running yarn being wound; and managing a winding state based on the transmission speed. 2. The yarn winding method according to claim 1, wherein the winding speed is controlled so that the transmission speed of the transverse wave of the running yarn during winding is in the range of 40 to 70 m / s.