JPH06129921A - Yarn tension measuring device and method - Google Patents

Abstract

(57) [Summary] [Object] To provide a yarn tension measuring device having a simple structure capable of continuously measuring a large number of yarn tensions. [Structure] A large number of warp yarns T are arranged at equal intervals by yarn guides 11 and 12, and arranged on the same plane by yarn support bars 13 and 14. The sensor unit 18 on the guide rail 17 is operated by the motor 19 so that
Drive over As the sensor unit 18 travels, the contacts 33 come into contact with the warp yarns T sequentially, and the tension is continuously detected. The tension detection signal is sent to the signal processing unit 34, and the determination circuit 37 of the signal processing unit 34 compares the reference value with the detected tension value to determine the abnormal tension. The output signal of the rotary encoder 21 which is interlocked with the sensor unit 18 is sent to the abnormality occurrence position display device 42, and the tension abnormality occurrence position is displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn tension measuring device and method for continuously measuring the tension of a large number of arranged yarns.

[0002]

2. Description of the Related Art In a loom, a large number of warp yarns (usually 1,000 or more) prewound on a yarn beam are sent out little by little, and weft yarns are alternately combined to weave a woven fabric. In order to obtain a good quality woven fabric, it is necessary to apply an appropriate tension to the warp, and the warp sent out from the yarn beam is given a predetermined tension. Generally, the total tension of all the warp yarns is detected, and the feeding speed of the warp yarns is controlled so that the detected total tension becomes a predetermined tension.

In order to wind more than 1,000 warp yarns around the yarn beam at a time, it is necessary to have the same number of yarn windings as a so-called cone as the number of warp yarns, that is, 1,000 or more. It is difficult to wind the warp around the yarn beam using such a large number of windings from the viewpoint of the arrangement space of the cone. Therefore, as shown in FIG. 11, the drum 1 of the warper is divided into 5 to 10 winding sections, and 100 to 200 cones 2 are used to make 10 warp yarns.
Each winding section of the drum 1 is sequentially wound in units of 0 to 200 to a predetermined diameter. After winding the warp yarns on each winding section, 1,000 or more warp yarns T wound on the drum 1 are wound on the yarn beam at once. This process is called a warping process, and the number of cones 1 is 100 to 2 by this warping process.
Only need 00.

As shown in FIG. 11, when the warp threads T of the cone 2 on the creel 3 are wound on the drum 1, each warp thread T is a thread guide 3a on the creel 3 and a thread guide 4 using a reed used in a loom. Passed through 5. The yarn guides 4 and 5 regulate the arrangement width of a large number of warp yarns T to the width of the winding section on the drum 1. The warp T between the yarn guides 4 and 5 is the guide rod 6
It is guided by A, 6B and guide rods 7A, 7B. The pair of guide rods 6A and 6B converge and guide the warp threads T drawn out from the large number of cones 2 on substantially the same plane,
The pair of guide rods 7A and 7B guide the warp yarns T, which are converged and arranged on substantially the same plane, to the drum 1 side in this converged arrangement state.

A tension adjusting rod 8 is provided between the pair of guide rods 6A and 6B and the pair of guide rods 7A and 7B.
A, 8B and 8C are arranged. Tension adjusting rod 8
The positions of A and 8B are fixed, and the tension adjusting rod 8C
Is urged downward by a tension applying spring 9. Therefore, in the warping step, the warp is straightened and the tension is made uniform at the same time.

[0006]

When the warp yarns are wound on the drum 1 of the warper, it is necessary to keep the tension of each warp yarn constant. When the warp yarn is wound around the drum 1 in a state where the tension is nonuniform, even when the warp yarn is wound from the drum 1 to the yarn beam, the tension is nonuniform and the yarn is wound around the yarn beam. The warp tension application in the loom is a method of applying a predetermined total tension to all the warp threads, and does not make the tension of each warp thread uniform. Therefore, if the warp yarn is wound around the yarn beam while the tension is not uniform, the woven fabric woven on the loom will be wrinkled.

As described above, the tension is made uniform in the warping step. However, the winding failure of the cone 2 or the thread clogging of the thread guide 3a causes abnormal tension. The winding failure of the cone 2 occurs when the warp is pulled out from the cone 2. When the yarn winding deviation occurs, the warp yarn is entangled, and the yarn entangled portion is blocked in the yarn guide. If so, the winding tension becomes excessive, and the warp will eventually break.

The yarn guide 3a is easily clogged with yarn waste when a spun yarn in which short fibers are twisted together is used. When the spun yarn in which short fibers are twisted is running, a lot of yarn waste is generated,
This yarn waste gets stuck in the yarn guide 3a. Then, the warp thread does not pass through the thread guide 3a smoothly and the tension becomes abnormal. In this case, the yarn is not broken, and the warp winding on the drum 1 is continued with the tension being excessive.

As a method of automating the yarn tension inspection, in the case of a machine having a small number of yarns, a method of attaching a tension meter to all the yarns is possible, and this method is common.
However, in the warping machine, the number of warp yarns is in the unit of several hundreds, and if a tension meter is installed on all warp yarns, it will be extremely expensive and maintenance will be difficult.

On the other hand, in the case of a machine in which the thread winding tension is constant even if the number of threads is large, the ON-like spring type switch is used.
In some cases, an OFF switch is used. However, since the warping machine handles a wide range of warp yarns from fine counts to thick counts, the average winding tension of each warp yarn is 10 to 100 g.
And wide range. Since the abnormal tension to be detected is a value with respect to the average tension, if the average tension changes, the abnormal tension value naturally changes accordingly. Therefore, it is necessary to change the inspection tension value according to the yarn type, but it is difficult to adjust the sensitivity for the same number of spring switches as the number of warp yarns.

Therefore, the conventional warper has a warp breakage detector, but does not have a tension abnormality detector. Therefore, when the warp yarn is wound in the warping process, the worker detects the tension by touching it and stops the winding immediately when the abnormal tension is detected. Such a sensory test by a person cannot perform a quantitative test, and requires a skilled worker. Such a situation is a bottleneck for labor saving in the warper.

The present invention provides a yarn tension measuring device having a simple structure capable of continuously measuring the tension of a large number of yarns, and
An object of the present invention is to provide a yarn tension measuring method that can reliably detect abnormal tension using this yarn tension measuring device.

[0013]

To this end, in the first invention, the plurality of arranged yarns are arranged so as to be movable along the arrangement surface of the plurality of yarns in a direction intersecting the traveling direction of the plurality of yarns. A tension measuring means, a yarn tension receiving means for sequentially contacting each yarn along the arrangement surface of a plurality of yarns and transmitting the yarn tension to the tension measuring means, and a tension measured by the tension measuring means, A yarn tension measuring device having a judging means for judging presence or absence of abnormal tension by comparing with a preset reference value is constructed.

In the second aspect of the invention, the contact portion of the thread tension receiving means that comes into contact with the thread has a convex shape, and the projecting end of this contact portion moves to a position beyond the array surface of the thread. In the third invention, the contact portion of the thread tension receiving means that comes into contact with the thread is the rolling element, and the thread restraining teeth are arranged on the peripheral surface of the rolling element.

According to a fourth aspect of the invention, the tension measuring means of the yarn tension measuring device is continuously reciprocated in a direction intersecting the running direction of a plurality of arranged yarns, and the yarn of the yarn tension measuring device is reciprocated. The arrangement position of the tension receiving means is detected, and when a tension different from a preset reference value is detected at the same reciprocating position of the thread tension receiving means, it is determined that the tension is abnormal.

[0016]

The tension measuring means of the first aspect of the invention moves along the arranging surface of the plurality of yarns in a direction intersecting the traveling direction of the yarns, and the yarn tension receiving means sequentially contacts each yarn. The yarn is pressed by this contact, and the pressing stress from the yarn is transmitted to the yarn tension receiving means in correspondence with the yarn tension. This pressing stress is transmitted as thread tension to the tension measuring means via the thread tension receiving means.
The determining means is a thread tension measured by the tension measuring means,
The presence or absence of tension abnormality is determined by comparing with a preset reference value.

When the yarn has uneven thickness, the yarn running tension varies. Therefore, even if a tension different from the reference value is detected at the time of the forward movement (or the backward movement) of the thread tension receiving means due to the unevenness of the yarn thickness, the backward movement (or the forward movement of the thread tension receiving means). The ratio that the detected tension falls within the standard value is extremely high. Therefore, when a tension different from a preset reference value is continuously detected at the same reciprocating position of the yarn tension receiving means of the second invention, the determining means determines that the tension is abnormal.

When the yarn tension receiving means having a convex contact portion with the yarn comes into contact with the yarn, the yarn is pressed and separated from the arrangement surface of the plurality of threads, and the contact portion protruding from the arrangement surface. Get over the tip. In the third aspect of the invention, when the change in the measured tension at the time of overcoming is within the reference value, the determining means determines that the tension is normal.

When the thread tension receiving means, in which thread restraining teeth are arranged on the peripheral surface of the rolling element, comes into contact with the thread, the thread is placed between adjacent thread restraining teeth. Be bound by.
The thread climbs over the rolling elements in this restrained state. Therefore,
In the fourth invention, when the yarn passes over the yarn tension receiving means, friction does not occur between the yarn and the yarn tension receiving means, and the yarn quality does not change.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment embodying the present invention will now be described with reference to FIG.
~ It demonstrates based on FIG. FIG. 1 shows an overall view of the yarn tension measuring device. 11 and 12 are thread guides using a reed,
They are arranged in parallel. The warp yarns T drawn from a plurality of creels (not shown) are passed through the yarn guides 11 and 12 through a guide mechanism and a tension applying mechanism similar to the configuration of FIG. The yarn guides 11 and 12 guide the warp yarns T so that the intervals between the plurality of warp yarns T are even and the lateral warp yarns are not displaced. A pair of yarn support bars 13 and 14 are arranged in parallel between the yarn guides 11 and 12. The yarn support bars 13 and 14 arrange and guide a plurality of warp yarns T on the same plane.

On both sides of the thread guides 11 and 12, columns 15,
16 are erected. A guide rail 17 is installed between the columns 15 and 16, and a sensor unit 18 is movably supported on the guide rail 17. A motor 19 is attached to one of the columns 16, and a drive timing pulley 20 is attached to an output shaft 19a of the motor. A rotary encoder 21 is attached to the other column 15, and a driven timing pulley 22 is attached to its input shaft 21a. A timing belt 23 is wound around the drive timing pulley 20 and the driven pulley 22. The timing belt 23 is fixed to the base frame 24 of the sensor unit 18, and the sensor unit 18 is guided by the guide rail 17 by the forward and reverse operation of the motor 19.
Drive over

Limit switches 25 and 26 are arranged on the left and right of the guide rail 17. Limit switch 2
5, 26 are turned on by contact with the sensor unit 18, and the forward / reverse operation of the motor 19 is limited by the limit switches 25, 2
It is switched by turning on 6. That is, the limit switches 25 and 26 regulate the reciprocating traveling range of the sensor unit 18. When the motor 19 is rotating in the normal direction, the sensor unit 18 travels from the limit switch 25 side toward the limit switch 26 side, and when the motor 19 is rotating in the reverse direction, the sensor unit 18 travels in the reverse direction.

As shown in FIGS. 2 and 3, a guide roller 24a is mounted in the base frame 24 of the sensor unit 18 so as to be rollable on the guide rail 17. The sensor unit 18 travels on the guide rail 17 by the rolling guide action of the guide roller 24a.

A support bracket 27 is suspended from the lower surface of the base frame 24, and a detection lever 28 is supported on the support bracket 27 via a support shaft 29 so as to be vertically rotatable. A support pin 30 is projectingly provided on the front surface of the base frame 24, and a tension spring 31 is interposed between the support pin 30 and the tip of the detection lever 28. A load cell 32 is attached to the lower surface of the base frame 24. Detection lever 2
The back surface of 8 is always in contact with the load cell 32 by the spring action of the tension spring 31.

An inverted triangular contactor 33 is fixed to the tip of the detection lever 28. The protruding end 33a of the contactor 33 extends downward beyond the array surface of the plurality of warp threads T, and the contact slopes 33b and 33c on both sides of the protruding end 33a sequentially contact the warp thread T as the sensor unit 18 travels. . The tip 33a of the contactor 33 projects from the warp yarn T array surface by about 1 to 2 mm. The amount of protrusion is adjusted by the guide rail 1.
It is performed by adjusting the height position of 7.

As shown in FIGS. 2 to 4, the warp yarn T is pushed downward while coming into contact with the contact slopes 33b and 33c of the moving contact 33, and gets over the projecting end 33a. The warp yarn T which is pushed downward by the contact element 33 gives the contact element 33 a stress proportional to the magnitude of its tension. This stress is applied to the load cell 3 via the contact 33 and the detection lever 28.
Communicate to 2. That is, the detection lever 28 and the contact 33 form a thread tension receiving means.

If the tension of the warp yarn T is small, the warp yarn T easily gets over the projecting end 33a of the contactor 33, and the contactor 33.
Gives little power to. If the warp tension is high, the tip 3
The force to get over 3a is increased. Therefore, the load cell 32 outputs a signal having a magnitude corresponding to the tension of the warp yarn T.

This detection signal is sent to the amplifier 3 of the signal processor 34.
Sent to 5. The signal processing unit 34 includes an amplifier 35, a determination reference value setting device 36, a determination circuit 37, a relay circuit 38, an abnormality display unit 39, a motor drive circuit 40, and an operation switch 41.
It consists of The amplifier 35 amplifies the tension detection signal input from the load cell 32 and outputs it to the determination circuit 37.

The judgment reference value setting device 36 is for setting the reference tension value F ₁ . The output characteristic of the load cell 32 with respect to the warp tension is tested in advance, and the output value of the load cell 32 when abnormal tension occurs is used as the reference tension value F ₁ .

The judgment circuit 37 compares the set reference tension value F ₁ obtained from the judgment reference value setter 36 with the detected tension value Fx obtained from the load cell 32. Judgment circuit 37
Determines the presence or absence of tension abnormality based on the magnitude comparison result. When the detected tension value Fx is less than or equal to the set reference tension value F ₁ , the determination circuit 37 determines that there is no abnormal tension. When the detected tension value Fx exceeds the set reference tension value F ₁ , the determination circuit 37 determines that the tension abnormality has occurred. When it is determined that the tension is abnormal, the determination circuit 37 outputs a tension abnormality signal. The abnormality display section 39 displays an abnormality based on the input of the tension abnormality signal. Further, the drive motor 10 of the take-up drum (not shown) of the warper stops its operation based on the output of the tension abnormality signal.

The relay circuit 38 turns on the operation switch 41.
It operates based on the operation. The relay circuit 38 switches the forward / reverse operation of the motor 19 based on the ON signal input from the limit switches 25 and 26.
The forward / reverse switching signal is output to 0.

The output signal of the rotary encoder 21 is sent to the reversible counter 43 of the abnormality occurrence position display device 42.
The abnormality occurrence position display device 42 includes a reversible counter 43, a latch circuit 44, and a display 45.

The forward / reverse switching signal output from the relay circuit 38 of the signal processing unit 34 is also input to the reversible counter 43. When the forward / reverse switching signal is input, the reversible counter 43 switches the increment / decrement count of the pulse signal input from the rotary encoder 21. That is, when the forward / reverse switching signal is the forward rotation command of the motor 19, the number of pulse signals is added, and when the forward / reverse switching signal is the reverse rotation command of the motor 19, the pulse signal is subtracted. The count of the pulse signal is based on the origin when the limit switch 25 is turned on and the motor 19 is switched from reverse rotation to forward rotation. Therefore,
When the limit switch 26 is turned on, the count number of the pulse signal becomes maximum.

The range of 0 to the maximum value of the count number of the pulse signal corresponds to the distance of the reciprocating range of the contact 33 of the sensor unit 18. Therefore, the count number of the reversible counter 43 represents the position of the contact 33, and thus the position of the warp thread T in contact with the contact 33. The tension abnormality signal output from the determination circuit 37 of the signal processing unit 34 is also input to the latch circuit 44. The latch circuit 44 holds the count number of the reversible counter 43 at the time of inputting this tension abnormality signal, and outputs the position of the contactor 33 corresponding to this count number to the display unit 45 for display. This display position represents the position of the warp yarn T in which the tension abnormality occurs. Therefore, the warp yarn T having the abnormal tension can be immediately identified, and the cause of the excessive tension can be promptly removed.

A curve E _{1 in} the graph of FIG. 8A shows a tension waveform obtained by actually measuring the tension of the warp using the apparatus of this embodiment. The measurement conditions are as follows. Number of threads / Warp row width: 400 threads / 800 mm Thread spacing: 2 mm Thread type: Wool yarn Thickness: 2/7 No. Winding speed: 120 m / min Winding tension Approx. 40 gf Sensor movement speed ... 0.8 m / sec Set reference tension value ... 60 gf The tension waveform E ₁ exceeds the set reference tension value 60 gf at position A. In this measurement example, the position A is displayed on the display 45.

The measured warp yarn is a woolen yarn in which a large amount of short fibers are used in order to give a feeling of the cloth, but this woolen yarn has many fluffs, and therefore, there is much unevenness in running resistance when passing through the yarn guide. Therefore, as can be seen from the measured tension waveform E ₁ , a large tension fluctuation occurs. Such fluctuations vary depending on the size of the fluff unevenness or the thickness unevenness, but when the unevenness is large, the tension fluctuation may reach up to ± 50% of the average tension value (winding tension of the above measurement conditions). Therefore,
If the reference tension value is set in an attempt to detect a tension abnormality within 50%, the tension abnormality judgment is output frequently even though the tension abnormality is not detected.
It cannot be set to a value within 0%.

However, even if the detected tension Fx exceeds the set reference tension value F ₁ during the forward movement (or the backward movement) of the contactor 33 due to the unevenness of the fluff or the thickness of the yarn, the contactor 33 is
The ratio at which the detected tension falls within the reference value is extremely high during the backward movement (or forward movement). FIG. 5 shows a second embodiment in consideration of this situation.

In the second embodiment, the determination circuit 4 of the signal processing unit 34 uses the count signal output from the reversible counter 43.
Enter in 6. The other structure is the same as that of the first embodiment. The determination circuit 46 performs the determination process twice shown in the flowchart of FIG. 6 based on the input of the count number signal.

When the detected tension value Fx exceeds the set reference tension value F ₁ , the judgment circuit 46 stores the count number information at this time, that is, the position B ₁ of the contact 33. The traveling direction of the sensor unit 18 is switched, and the position B of the contactor 33 is changed.
When the detected tension value Fx when the information of ₁ is input again exceeds the set reference tension value F ₁ , a tension abnormality signal is output. When the detected tension value Fx when the information of the position B ₁ of the contact 33 is input is equal to or less than the set reference tension value F ₁ , the determination circuit 46 determines that there is no abnormal tension and stores the stored position B 1.
Erase ₁

The two-time determination method for determining the tension abnormality only when the tension exceeding the set reference tension value F ₁ is detected continuously at the same reciprocating position of the contact 33 is different from the tension abnormality. Alternatively, erroneous determination of tension fluctuation due to unevenness of thread thickness is eliminated.

Curve E in FIGS. 8B and 8C₂, E
₃Shows the sensor unit under the same measurement conditions as in Fig. 8 (a).
With the tension waveform that measured the tension during 18 consecutive round trips
is there. Tension waveform E₂Is position B₁, B₂, B₃Setting standard with
Tension value F₁Is exceeded, but tension waveform E₃Is position B₁so
Only set reference tension value F₁Is over. Position B₂, B ₃
The detected tension at is set as a reference tension value only in one direction of reciprocation.
F₁Crossing over, position B₁The detected tension at
Set reference tension value F in both directions₁Is over. Ie position
B₂, B₃Tension detected in fluff is uneven
This is because the tension is changed due to uneven thickness of the thread.
It turns out that it is not a force abnormality. On the other hand, position B₁To
The excessive tension detected by the
Indicates that the tension is abnormal due to thread clogging.

FIG. 7 shows a third embodiment which is an extension of the two-time determination method of the second embodiment. In this embodiment, the same determination circuit 37A as the determination circuit 37 of the first embodiment and the same determination circuit 46A as the determination circuit 46 of the second embodiment are used together. Each of the judgment circuits 37A and 46A has a judgment reference setter 3
6A and 36B are connected. Judgment standard setting device 36B
The reference tension value F ₂ set by is larger than the reference tension value F ₁ set by the judgment reference setting unit 36A. In the third embodiment, the count signal output from the reversible counter 43 is used as the determination circuit 46 of the signal processing unit 34.
Enter in A. The tension abnormality signals output from the determination circuits 37A and 46A are output to the drive motor 10, the abnormality display unit 39 and the latch circuit 44. The other structure is the same as that of the first embodiment.

The decision circuit 46A is similar to that of the second embodiment shown in FIG.
The determination circuit 37A performs the same determination process as in the first embodiment based on the comparison between the set reference tension value F ₂ (> F ₁ ) and the detected tension value. By this method, when an excessive tension larger than the set reference tension value F ₂ is generated, the abnormal tension is immediately detected, and the cause of the abnormal tension can be quickly removed.

Curve E in FIG. 8 (d)_FourIs the set reference tension value F
₂Is set to 80 gf, and others are as shown in FIGS. 8 (a) to 8 (c).
It is a tension waveform measured under the same measurement conditions. Tension wave
Shape E _FourIs the reference tension value F set at position D₂Above and beyond
Excessive tension detected in device D causes the thread guide to be blocked.
Or abnormal tension due to thread clogging
It

The present invention is not limited to the first to third embodiments, but a pair of sensor units 18A, 1 as shown in FIG.
By using 8B together, the abnormal tension can be detected more quickly. The sensor units 18A and 18B are fixed to the timing belt 23, respectively. Sensor unit 1
8A turns on the limit switch 25, and the sensor unit 18B turns on the limit switch 26. When the limit switch 25 is turned on, the sensor units 18A and 18B
Moves toward the limit switch 26 side, and when the limit switch 26 is turned on, the sensor units 18A and 18B move toward the limit switch 25 side. Both sensor units 18
If the distance between A and 18B is set to be half the distance between both limit switches 25 and 26, the sensor units 18A and 18B respectively move on one side of the guide rail 17. Therefore, the sensor units 18A and 18B are responsible for half of the inspection area of the sensor unit 18 of each of the above-described embodiments. If the inspection areas are shared by the plurality of sensor units in this way, the inspection cycle becomes shorter and the tension abnormality is detected earlier.

In each of the above-mentioned embodiments, the shape of the contact 33 is an inverted triangle, but with this shape, the friction in the slope direction between the contact slopes 33b and 33c and the thread when the thread moves while pressing the thread is large. . In particular, in the case of a fine yarn having a lot of fluff, the yarn quality is likely to be adversely affected by the friction with the contactor.

In order to avoid such a bad influence on the yarn quality due to friction, it is convenient to use the contact 47 having a shape as shown in FIG. The contact 47 is a rolling element supported by the tip of the detection lever 28, and the thread restraining tooth 4 is provided on the peripheral surface thereof.
7a are arranged at equal intervals. The yarn restraining teeth 47a are arranged at the same intervals as the warp yarn arrangement intervals. When the sensor unit is moved, the contact 47 rotates and the thread restraining tooth 47a rotates.
In the meantime, the warp yarns are restrained one by one. The warp tension is detected by the load cell 32 via the contact 47 and the detection lever 28.

Since the contactor 47 rotates, the thread restraining teeth 47
There is no relative displacement in the circumferential direction between the warp T between a and the peripheral surface of the contact 47. Therefore, there is no friction between the contact 47 and the warp yarn T in the circumferential direction, and the yarn quality is not adversely affected by the contact with the contact 47.

In addition to the warping machine, the present invention can be applied to the application of measuring the tension and inspecting the tension of many yarns.

[0050]

As described in detail above, according to the present invention, the yarn tension receiving means is sequentially brought into contact with each yarn along the arrangement surface of a plurality of yarns, and the tension is transmitted to the tension measuring means to detect the detected tension. Since the presence or absence of tension abnormality is determined by comparing with a preset reference value, the excellent effect of being able to continuously measure the tension of a large number of threads despite the simple device configuration is provided. Play.

The measuring method in which when the tension different from the preset reference value is detected at the same reciprocating position of the thread tension receiving means, it is judged that the tension is abnormal, the tension fluctuation caused by the unevenness of the thread thickness is detected. It has an excellent effect that it can be excluded from the tension abnormality and only the original tension abnormality can be accurately detected.

When the yarn tension receiving means in which the contact portion with the thread is a rolling element and the thread restraining teeth are arranged on the peripheral surface of the rolling element is used when the thread gets over the thread tension receiving means. Therefore, there is no friction between the yarn and the yarn tension receiving means, and it is possible to avoid a change in yarn quality.

[Brief description of drawings]

FIG. 1 is a combination diagram of a perspective view and a circuit diagram showing a first embodiment embodying the present invention.

FIG. 2 is a front sectional view of a sensor unit.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is an enlarged perspective view of a main part.

FIG. 5 is a combination diagram of a perspective view and a circuit diagram showing a second embodiment embodying the present invention.

FIG. 6 is a flowchart showing a two-time determination process of the second embodiment.

FIG. 7 is a combination diagram of a perspective view and a circuit diagram showing a third embodiment embodying the present invention.

8A to 8D are graphs showing yarn tension measurement results.

FIG. 9 is a perspective view showing an embodiment using two sensor units.

FIG. 10 is an enlarged perspective view showing another example of the contactor that constitutes the thread tension receiving means.

FIG. 11 is a perspective view showing a conventional warper.

[Explanation of symbols]

17 ... Guide rail, 18, 18A, 18B ... Sensor unit, 19 ... Motor, 20 ... Driving timing pulley,
21 ... Rotary encoder, 22 ... Driven timing pulley, 23 ... Timing belt, 25,26 ... Limit switch, 28 ... Detection lever which constitutes yarn tension receiving means,
32 ... Load cell which serves as tension measuring means, 33 ... Contact which constitutes yarn tension receiving means, 34 ... Signal processing portion which serves as judging means, 42 ... Abnormality occurrence position display device, 47 ... which constitutes yarn tension receiving means Contact, T ... warp.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Otsuka, Nagakute-cho, Aichi-gun, Aichi Prefecture, 1 o'clock character, Toyota Central Research Institute, Ltd. at 41, Yokomichi (72) Inventor, Kazuhisa Higashi, Nagakute, Aichi-gun, Aichi-gun 1 Chuo Yokoido 1 Toyota Central Research Institute Co., Ltd. (72) Inventor Yu Kawabata Nagachite Town, Aichi-gun, Aichi Prefecture Large character Nagata Yoko Toyota 1 Chuo Research Laboratories 1 72 (72) Inventor Hideo Arakawa Aichi 1 Chuo Road, Nagakute-machi, Nagakute-cho, Aichi 1 Toyota Central Research Institute Co., Ltd. (72) Inventor Takao Hasegawa 1-1, Toyota-cho, Kariya city, Aichi Toyota Boshoku Co., Ltd. (72) Inventor Masayuki Hattori Aichi 1-chome Toyota-cho, Kariya city, prefecture Toyota Boshoku Co., Ltd.

Claims (4)

[Claims] 1. A tension measuring means arranged so as to be movable along an array surface of a plurality of threads in a direction intersecting a traveling direction of the arrayed threads, and an array surface of the plurality of threads. Along with the thread tension receiving means for sequentially contacting each thread and transmitting the thread tension to the tension measuring means, the tension measured by the tension measuring means, and the tension by comparing with a preset reference value. A yarn tension measuring device comprising a judging means for judging whether or not there is an abnormality. 2. The yarn tension measuring device according to claim 1, wherein a contact portion of the yarn tension receiving means that comes into contact with the yarn has a convex shape, and a tip of the contact portion moves to a position beyond the array surface of the yarn. apparatus. 3. The yarn tension measuring device according to claim 1, wherein the contact portion of the yarn tension receiving means that comes into contact with the yarn is a rolling element, and thread restraining teeth are arranged on the peripheral surface of the rolling element. 4. The yarn tension measuring device according to claim 1, wherein the tension measuring means of the yarn tension measuring device according to claim 1 is continuously reciprocated in a direction intersecting a running direction of a plurality of arranged yarns. Of the thread tension receiving means, the thread tension measuring method determines that the tension is abnormal when a tension different from a preset reference value is detected at the same reciprocating position of the thread tension receiving means.