JPH10310329A - Tension monitoring device in yarn manufacturing process - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and accurately detect single yarn movement by comparing the detection signals from yarn tension detecting means provided correspondingly to individual yarns, and judging whether they are normal or abnormal. SOLUTION: Multiple yarns spun from a spinning device 1 are wound on multiple bobbins fitted to spindles 6, 7 by a winding device 4 respectively. Multiple tension sensors 13 serving at yarn tension detecting means are installed at prescribed positions by support members between a yarn separating guide 11 and swing fulcrum guides 12. The tension sensors 13 are made of a three- point contact type detector, and their detection signals are sent to a comparing/ judging means 10. The comparing/judging means 10 receives the detection signals of the tension sensors 13, compares the adjacent tension detected values based on the detection signal values, and judges whether they are normal or abnormal. The single yarn movement in the yarn winding action can be accurately detected regardless of a tension change.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension monitoring device in a yarn manufacturing process for winding a yarn spun from a spinning device around a winding machine.

[0002]

2. Description of the Related Art Generally, in a process for producing a synthetic fiber yarn such as polyamide or polyester, a plurality of yarns spun from a spinning device are wound on a plurality of bobbins mounted on one spindle. It has become.

[0003] In the manufacturing process, in a cooling section, an oiling section, a guide section of the winding apparatus, and the like, which are spun from the spinning apparatus until the yarn is wound on a bobbin, the yarn constituting the yarn is cut. Single yarn movement occurs in which the upstream single yarn moves to the adjacent yarn.

[0004]

When the above-described single yarn moves to an adjacent yarn and causes unevenness in thickness, a difference in diameter occurs between the packages, or the winding breaks and the spindle is damaged. Or an excessive load is applied to the chuck mechanism of the spindle, so that tightening cannot be performed in a normal state and the package jumps out of the spindle.

In order to detect the movement of the single yarn by detecting the fluctuation of the tension, the fluctuation of the tension is very small. Therefore, it is necessary to reduce the width of the upper limit value and the lower limit value, which are the reference values for judging the tension abnormality. However, when the width is reduced, the change in the traverse speed, the change in the winding speed, and the tension fluctuation value due to vibration, etc., which are performed to avoid the ribbon winding at the time of winding the yarn and to prevent the edge of the package from rising, are larger. However, there is a problem in that these tension fluctuations are detected as abnormal tension, and a normal winding operation cannot be performed.

Further, the movement of the single yarn is performed by a cooling unit, an oiling unit,
There is a problem that it is structurally impossible to monitor at all of these points because it occurs at a guide portion or the like in the winding device.

As described above, various devices for detecting the movement of a single yarn have been studied, but have not been put to practical use.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tension monitoring device in a yarn manufacturing process capable of easily and accurately detecting movement of a single yarn.

[0009]

In order to solve the above-mentioned problems, a tension monitoring device in a yarn manufacturing process according to the present invention comprises a yarn tension detecting means corresponding to each yarn. In addition to the above, a configuration is provided in which comparison determination means is provided for comparing detection signals from adjacent yarn tension detection means to determine whether the yarn tension is normal or abnormal.

[0010] The term "adjacent" as used herein is not limited to the case of being adjacent to each other, but also includes, for example, the state of flying one spindle, the first and third, the second and fourth, and the like.

[0011]

FIG. 1 is a schematic diagram showing the overall construction of a yarn production facility according to the present invention, and FIG. 2 is a block diagram of a yarn tension device in FIG. Spinning device 1 consisting of a spinning metering pump, spinneret, etc.
And a revolving member (not shown) in which a first take-up roller 2 and a second take-up roller 3 for taking up the spun yarn at a predetermined speed, a traverse mechanism 5, and two spindles 6 and 7 are rotatably mounted. The winding device 4 includes a contact roller 8 and the like, a control device 9 installed at a position close to the winding device 4, and a comparing and determining unit 10.

The above-mentioned second take-up roller 3 and take-up device 4
A thread splitting guide 11 and a swinging fulcrum guide 12 are installed at predetermined positions by a support member (not shown). In response to this, a tension sensor 13 (13-1 to 13-m) serving as a yarn tension detecting means is provided with a support member (not shown).
Is installed at a predetermined position.

The tension sensor 13 uses a three-point contact type detector or a non-contact type detector, and each detection signal is sent to the comparing and judging means 10.

The above-mentioned winding device 4 includes a traverse speed sensor for detecting a traverse speed and a winding speed sensor for detecting the winding speed [spindles 6 and 7] as winding state detecting means.
A sensor for detecting the rotation speed of the contact ruler 8 and the rotation speed of the contact ruler 8 (none of them is shown) is provided, and each detection signal is sent to the control device 9.

The controller 9 is connected to a line controller (not shown). Based on a control command signal from the line controller (not shown), the traverse mechanism 5, the spindles 6, 7 of each winding device 4 are connected. Speed is controlled.

The comparing and judging means 10 comprises a plurality of winding devices 4
(4-1 to 4-n), and a tension signal input unit 14 (to which a detection signal from the tension sensor 13 (13-1-1 to 13-nm) is input). 14-1 ~
14-n) a control unit 15 which performs an operation of judging normal or abnormal by comparing adjacent tension detection values based on each detection signal value, comprising a lamp 16 for alarm, a buzzer 17 and a display for display. 18 and the like are connected. A printer 19 can be connected to the control unit 15 to print and output abnormal data and the like.

When the detection signal from the tension sensor 13 is an analog signal, the tension signal input section 14 is provided with a low-pass filter for cutting unnecessary signals out of the analog signals. fc) is around 5 (HZ). As the low-pass filter, a hard circuit filter or a digital filter is used. When the detection signal from the tension sensor 13 is a digital signal, a converter for converting a parallel signal into a serial signal is provided.

The control section 15 is located in the same weight (same winding device) and has a first comparison function of comparing detection signals from the adjacent tension sensors 13, a storage function of storing the tension difference, and a storage function. A second comparison function for comparing the detected tension difference with the current value, a determination function for determining whether or not the value compared in the second comparison function is within a tolerance abnormality determination reference allowable value, a tension abnormality determination reference allowable value Any of a microcomputer, a personal computer, and a programmable logic controller having a function such as an operation command signal output function of transmitting an operation command signal to the lamp 16 and the buzzer 17 when it is determined that the number has exceeded the threshold value is used.

In the above-described tension monitoring, the tension sensor 13 is used.
FIG. 3 is a graph showing a state where the difference between the detection signal from the tension sensor 13-2 and the detection signal from the tension sensor 13-2 is compared.
In the case of -1, the tension value of either yarn (T-1), (T-2)
Also fluctuate, but in both cases they are also substantially similar.
This is due to a change in the traverse speed, a change in the winding speed, a vibration, etc., which affect the entire winding device 4, so that the difference (ΔT) is canceled between the yarns and does not appear as a large change. Can be determined.

On the other hand, in the section t-n, the section t-1
Unlike the case of, the tension difference is enlarged. This is thread 3
When the single yarn of 0-2 moves to the yarn 30-1 and becomes entangled with the yarn, the thickness of the yarn changes, and as the yarn is wound, the weight difference of the package gradually increases, and the single yarn becomes The package on the reduced side does not have a large winding diameter, and the package on the side where the single yarn is entangled has a larger peripheral diameter than the other packages, causing a difference in peripheral speed on the package surface. It can be determined that the tension value has increased, indicating that the tension value of the yarn 30-2 has decreased.

In this case, when the tension value (T-1) exceeds the allowable value for the reference for judging abnormal tension, an alarm operation command signal is transmitted from the control unit 15, the lamp 16 is turned on, the buzzer 17 sounds and the single yarn Notify the worker that the movement has occurred. Further, the number of the winding device 4 corresponding to the display 18, the yarn position, the tension value at that time, and the like are displayed by a diagram, numerical values, and the like.

By the warning by the lamp 16, the buzzer 17 or the like, the corresponding yarn processing of the winding device 4 can be performed promptly.

In the above-described embodiment, adjacent signals are detected as detection signals from the adjacent yarn tension detecting means. However, since the single yarn may be entangled with a yarn at a distant position, the first and third signals may be detected. It is needless to say that a signal can be detected from the yarn tension detecting means at the distant positions such as the second, fourth, and the like to determine whether the yarn is normal or abnormal.

[0024]

According to the method for monitoring the tension in the yarn manufacturing process of the present invention, the yarn tension detecting means is provided corresponding to each yarn as described in claim 1, and the yarn tension detecting means from the adjacent yarn tension detecting means is provided. The structure is provided with comparison and judgment means for comparing the detection signals to determine whether the yarn is normal or abnormal, so that the single yarn can be moved regardless of the traverse speed change in the yarn winding operation and the tension change based on the winding speed change. It can be easily and accurately detected.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of the overall configuration of a yarn manufacturing facility of the present invention.

FIG. 2 is a block diagram showing one embodiment of a yarn tension monitoring device according to the present invention.

FIG. 3 is a schematic diagram illustrating an example of a relationship between detected tension values of adjacent yarns.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spinning device 2 1st take-up roller 3 2nd take-up roller 4 Take-up device 5 Traverse mechanism 6, 7 Spindle 8 Contact roller 9 Control device 10 Comparison / judgment means 11 Thread dividing guide 12 Swing support point guide 13 Tension sensor 14 Tension signal input section 15 Control section 16 Lamp 17 Buzzer 18 Display 19 Printer

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hisao Hasegawa 1-1-1 Sonoyama, Otsu, Shiga Prefecture Toray Engineering Co., Ltd.

Claims (1)

[Claims] 1. A contact roller for applying a surface pressure by contacting a yarn spun from a spinning device with a traverse mechanism, a bobbin mounting spindle, a yarn wound on a bobbin, and winding state detecting means. A device that detects an abnormality based on the tension of the running yarn during winding detected by the yarn tension detecting means installed on the upstream side of the winding device when winding by the winding device having The yarn tension detecting means is provided for each yarn, and comparison determining means for comparing detection signals from adjacent yarn tension detecting means to determine whether the yarn is normal or abnormal is provided. A tension monitoring device in the yarn manufacturing process.