JPH06184841A - Sensor for yarn breakage in spinning frame and method for processing sensed data - Google Patents

Abstract

PURPOSE:To accurately discriminate the number of broken yarns by collecting broken fiber of yarn flying in a duct of a spinning frame with a cotton collecting rod and then sensing the attainment of the accumulated cotton to a prescribed amount with a sensor. CONSTITUTION:Broken fiber (f1) of yarn flying in a duct 1 of a spinning frame is collected with a cotton collecting rod 3, installed and tilted from the flow direction (A) and the attainment of the accumulated cotton to a prescribed amount or more is sensed with a sensor 4. When the sensor is a reflecting type photoelectric sensor, electromotive force of the photoelectric sensor is in proportion to the number of broken yarns.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn cutting detecting device and a method of processing yarn cutting detecting data in a spinning machine.

[0002]

2. Description of the Related Art Conventionally, there are roughly three types of detecting devices for detecting a thread break in a spinning machine. A method of detecting the rotation of the traveler by a proximity sensor, a method of detecting the vibration of the spun yarn by a piezoelectric sensor, and a method of detecting the amount of yarn cutting fleece by a photoelectric sensor.

However, the above conventional method has the following problems. First, in the detection method of (1), a sensor is attached to each weight, or the sensor is moved along the ring rail, so that it becomes very expensive and economically difficult to spread. By the way, one spinning machine usually
It has about 200 weights on each side.

With respect to the above detection method, the yarn cutting fibers flying in the duct are directly detected by a photoelectric tube, and the presence or absence of the yarn cutting or the yarn cutting is generated depending on the number of detection pulses within a certain time. A method of determining the number of existing weights (hereinafter, referred to as the number of thread cuttings) has been proposed, and this method has an advantage of economically 1/3 or less of the method.

However, according to the detection method, a large number of short fibers called cotton wool are sucked and fly outside the yarn cutting fleece of long fibers in the duct regardless of the presence or absence of the thread cutting. Since the photocell has a thread-cutting fiber (long fiber) as well as a cotton wool (short fiber)
Since the same is also detected, the determination accuracy of the thread trimming detection becomes inaccurate, that is, the number of cones causing the thread trimming is set to 1 for example.
I couldn't accurately identify books such as two, three, and so on. In addition, when the spinning speed of the spinning machine is increased from the start of winding to the full pipe, the increase in the cotton fly changes more than the change in the spinning speed, so it is necessary to change the reference value for judging the thread trimming. However, it is necessary to incorporate a special correction circuit for solving this point into the thread trimming determination circuit.

Further, the photoelectric sensor for detecting the thread cutting fleece in the above detection method, as shown in FIG. 12, has holes H ₁ and H ₂ facing the upper and lower sides of the duct D, and these holes are opened. The dust-proof glass plates G ₁ and G ₂ are bonded to H ₁ and H ₂ , and the projector S
₁ and a light-receiving device S ₂ of a light-shielding type photoelectric tube are provided, but seed dust d ₁ and fiber oil agent d ₂ tend to adhere to the lower surface of the duct. Especially, in the case of synthetic fiber, glass plates G ₁ , G _The fiber tuft FT grew around ₂ and rocked, causing the sensor to malfunction. Furthermore, the fine fiber groups f ₁ and f ₂ that fly while pulsating at high speed are captured by a photoelectric tube,
In order to determine the thread breakage, a highly sensitive photodetector S ₂ and a specially designed electronic printed circuit board (not shown) are required, which not only increases the manufacturing cost but also accumulates the data. If you want to utilize it, you had to equip the communication function separately. FIG. 11 is a perspective view of the spinning portion of the spinning machine. The spinning spinning fleece (long fiber) carried by the rubber aprons V ₁ and V ₂ is spun by the rubber rollers R ₁ and R ₂ , and the weight ( Although not shown), the dust (short fibers) f ₂ and the long fibers f _{1 that} have been thread-cut off from the rollers R ₁ and R ₂ at the time of spinning are the suction ports of the furt F. It is adapted to be sucked by F ₁ and to fly in the duct D to the filter box.

As described above, since the conventional detection method detects the yarn cutting fibers flowing in the duct D, it only needs to be attached to the suction end end, which is simple and economical in this respect, but Since the running fibers are directly detected by the photoelectric tube, there is a problem in that the reliability of the thread breakage detection is lacking due to malfunctions such as dust and dirt in the duct as described above. In addition to this, it is necessary to custom-order a phototube or a printed circuit board formed with high sensitivity, which makes it slightly expensive, and it is difficult to use standard parts even when a communication function is added separately.

[0008]

In view of the above-mentioned prior art, the present invention collects only the thread-cutting fibers that fly in the duct with a cotton swab, so that the yarn is cut regardless of the cotton wool or the short fibers. Only the thread-cutting fleece that has a long fiber length is collected in front of the sensor, and the number of thread-cuts is accurately identified by detecting this. Specifically, it is determined by the difference in the detection interval. A thread trimmer detection device that can clearly discriminate the actual number of thread trimmers, 1, 2, and 3, and that does not cause a difference in the detection data of the winding start and full pipe, and the detection by this device. It is an object of the present invention to provide a method for processing thread cutting detection data that is performed.

[0009]

One of the constitutions of the present invention made for the purpose of solving the above-mentioned problems is to install a yarn-cutting fiber flowing in a duct of a spinning machine inclined in the flow direction. It is characterized in that the collected cotton is collected by a cotton swab and the accumulated cotton has reached a certain amount by a sensor to remove the accumulated cotton.

[0010]

Embodiments of the present invention will now be described with reference to the drawings.
1 is a perspective view of an example of the detection device of the present invention, FIG. 2 is a perspective view of another example of the device of the present invention, FIG. 3 is a sectional view of a specific example of the device of FIG. 1, and FIG. 4 is a swab in the device of FIG. FIG. 5 is an enlarged side view showing an essential part of another example of the cotton swab in the apparatus of FIG. 1, and FIG. 6 is an enlarged perspective view showing an essential part of the cotton swab in the apparatus of FIG. 7 is a perspective view showing a state in which the cotton swab shown in FIG. 6 is opened, FIG. 11 is an enlarged perspective view of a protection portion in a spinning machine, and FIG. 12 is a perspective view of an example of a conventional thread trimming detection device.

In FIGS. 1 and 2, reference numeral 1 indicates the above in order to suck the thread-cutting fibers (long fibers) and dust (short fibers) cut in the spinning machine into the flute and collect them in the filter box. The duct 2 in the spinning machine provided between the float and the filter box is arranged with an inclination of about 45 degrees with respect to the air flow direction A from the ceiling surface 1a of the duct 1 toward the inside of the duct. It is a thread-cutting detection sensor (hereinafter, simply referred to as sensor-2) in the installed device of the present invention.

The sensor-2 shown in FIG. 1 is attached by mounting a sensor-mounting base plate 2a on a hole 1b formed in a ceiling surface 1a of a duct, and mounting the inside of the base plate 2a on the base plate 2a. Two hollow cotton swabs 3 each having a downward hook shape are arranged in parallel and provided with an inclination of about 45 degrees with respect to the air flow direction A, and are arranged substantially right next to the swabs 3. rod
A reflection type photoelectric sensor-4 is provided at a position which is the tip of 4a and faces the side surface of the cotton collecting part 3a. Incidentally, 4b
Is a signal line of the photoelectric sensor-4.

In the apparatus of the present invention shown in FIG. 2, the cotton swab 31 is replaced with a cotton swab 31 having a tweezer-like or clip-like openable cotton swab 31a. Although it is different from the first device, other devices have the same configuration. Therefore, the same reference numerals as those in FIG. 1 indicate the same members. The clip-shaped cotton collecting portion 31a is opened and closed by, for example, an opening and closing actuator such as an electromagnet provided at the base portion thereof.

The apparatus of the present invention shown in FIGS. 1 and 2 has a mounting structure as shown in FIG. 3 as an example in order to be detachable from the duct 1. In FIG. 3, the ceiling surface of the duct 1
A hole 1b formed in 1a is formed with a hole 2h that is the same as this hole 1b.
The plate 2a is attached by adhesion or the like, and a fitting projection 2c formed by projecting at the center of the bottom of the sensor body 2b is fitted into the hole 2h of the plate 2a. In the present invention, the sensor-2 may be provided at any position such as the ceiling surface 1a of the duct 1 as well as the side surface 1c as long as the swab 3 can be arranged inside the duct 1.

A magnet 2d is buried on the outer peripheral side of the bottom surface of the body 2b, and the body 2b is secured to the base plate 2a by the magnet 2d. This allows the body
2b can be mounted in the hole 1b in any direction with respect to the hole 1b. In addition, 2e is a pressing piece for abutting on a straight side 2f formed on the outer periphery near the bottom of the body 2b to fix the orientation of the body 2b, which is attached to the base plate 2a by a screw 2g. There is.

At the approximate center of the fitting protrusion 2c on the lower surface of the body 2a, two cotton collecting rods 3 and 3 and a supporting rod 4a for the sensor 4 are provided downward at an angle of about 45 degrees with respect to the lower surface. And are planted. An air supply pipe 3c connected to an external air supply source is provided at the rear end of the air passage 3b formed through the swabs 3, 3, and the sensor-4 has a support rod.
Signal lines 4b are connected to each other via 4a.

Thus, in the apparatus of the present invention shown in FIGS. 1 and 2, as in the inside of the duct D in the case of the conventional apparatus shown in FIG. 9, there are thread-cutting fibers f _{1 of} long fibers and dust. Although the short fibers f ₂ are flowing together in the ducts shown in FIGS. 1 and 2, only the long thread cutting fibers f ₁ are caught by the cotton collecting rods 3 and 31 and are made hooked at the tips of the rods 3 and 31 due to the flow velocity. The formed cotton collecting part 3a or the closed clip-shaped cotton collecting part 31a is moved and deposited. Short fiber f ₂
Even if it is once caught on the cotton swabs 3,31, it is separated from the cotton swabs 3,31 by the flow velocity and is made to flow downstream of the duct.

As described above, according to the device of the present invention, only the filament cutting fibers f ₁ of long fibers are accumulated in the cotton collecting portions 3a and 31a. Therefore, this cotton collecting state is detected by the reflective photoelectric sensor-4. Then, the thread cutting fiber f ₁ is caught on the cotton collecting portions 3a and 31a, and a signal proportional to the number of thread cuttings is obtained in the electromotive force of the photoelectric sensor-4. This is the thread-free fleece
This is because the number of weights in the thread cutting state increases in proportion to the number.

Therefore, in the present invention, the number of yarn cutting lines is determined by detecting and breaking the electric signal obtained by the photoelectric sensor-4 according to the amount of yarn cutting fleece accumulated on the cotton collecting portions 3a, 31a. I made it possible to distinguish even books. This point will be described later.

The cotton collected on the cotton collecting portions 3a and 31a is, in the apparatus shown in FIG. 1, as shown in FIG.
A gas air having a high flow velocity such as compressed air is supplied to the air flow path 3b formed in the inside of the hook to collect the thread-cutting fibers f ₁ in the accumulated state in the hook-shaped cotton collecting portion 3a. By opening the, it is removed so as to fly to the downstream side in the duct. In addition, as shown in FIGS. 6 and 7, the cotton collection accumulated on the clip-shaped cotton collection part 31a of FIG. 2 is made to fly to the downstream side of the duct 1 by opening the clip-shaped part. .

The inventors of the present invention tested and studied the thread cutting detection using the apparatus of the present invention, and as a result, in a spinning machine having about 200 weights on each side, the apparatus of the present invention was used. It has been found that the operating interval, which operates by detecting thread cutting, is proportional to the number of thread cuttings.

That is, in the above spinning machine, the photoelectric sensor-4 of the device of the present invention has 50 to 50
It operates at intervals of 70 seconds, when the thread cutting weight is one, the operation interval of the sensor-4 is at intervals of 20 to 30 seconds, and when it is two, the operation interval is the same. I knew that if the number of balls was 3 to 20 seconds, and that there were three bars, they would operate at intervals of 10 to 15 seconds. FIG. 8 is a diagram showing an example of the relationship between the number of thread cuttings and the operation interval of the thread cutting detection sensor.

Therefore, in the present invention, when the photoelectric sensor-4 of the thread trimming detecting device of the present invention operates at an interval set for, for example, 30 to 40 seconds, 0 thread trimming, 16 thread trimming is performed.
One thread trimming operation at the interval set for 25 seconds,
By setting in advance a criterion for judging that the interval operation set between 11 and 17 seconds is three or more thread cuts, the number and the number of thread cuts are detected and determined. When the number of thread cuttings is zero, theoretically, the photoelectric sensor-4 of the device of the present invention does not detect the accumulated cotton, so that it is considered that the operation interval of the photoelectric sensor becomes infinite. But,
In fact, long fibers that are not spun by the rubber roller even if there is no thread cutting are sucked into the flute and fly in the duct.
Photoelectric sensor-4 with the above interval even with zero thread breaker
It has been confirmed in an experiment that the above works.

The yarn-cutting fibers flowing in the duct may cause an abnormal value in the operation interval of the photoelectric sensor-4 due to entanglement, vortex, pulsation, etc. during flight. Therefore, in the present invention, it is preferable to use a plurality of detection data for the operation interval of the photoelectric sensor-4, for example, a moving average value of about 6 detection data as the determination value.
If such a moving average value is used as the discriminant value, the response time for thread trimming detection will take about 1 to 4 minutes between three and one thread trimmings. There is no problem in practice because the patrol interval for each person is about 14 to 20 minutes per spinning machine.

In the present invention, as shown in FIG. 10, each spinning machine is provided with a lamp L capable of flickering at a different frequency depending on the number of thread cuttings detected by the device of the present invention, or a lamp of a different color. By visually displaying the thread trimming contents, an operator can change the patrol order for each spinning machine to perform the yarn splicing work, or request the worker in the next process to support the yarn splicing work. Can be able to FIG. 9 is a diagram showing an example of a blinking pattern in which the flicker state of the display lamp is changed according to the number of thread cuts, and FIG. 11 processes the signal from the photoelectric sensor-4 above the duct 1 of each machine base. FIG. 3 is a perspective view showing an example of a display unit provided with a display control unit 5 having a sequencer and a controller.

Further, in the present invention, in addition to displaying the thread trimming for each spinning machine as described above, or in addition to this, one spinning group is provided for every 5 to 10 spinning machines. The thread trimming detection data for each group is aggregated in the computer C through the communication lines N, LAN, etc., as shown in FIG. 10, and this data is grouped in advance. The quality of the spinning tone of each group is determined by comparing with the data indicating the spinning tone set in the unit, and the spinning tone of each group is, for example, "red". , "Yellow" and "Blue" lamps may be used to display the spinning status of the entire spinning machine in operation on the display DP or the lamp L as a "wide area anastheter".

In this way, the workers in charge of the spinning machines of the respective groups mutually support, for example, the yarn splicing work, and the workers and managers of other processes display the display. Accordingly, it becomes easy to support the yarn joining operation.

In the present invention, the reference value for the above-mentioned detection and discrimination, or the discrimination value such as the width of the threshold value is the product switching,
Needless to say, the rubber roller may be replaced and the collector may be replaced depending on the conditions for preventing sleep.

In the present invention, the cotton collecting parts 3a and 31a and the sensor-4 are used.
Is installed in the central portion of the duct 1 by obliquely projecting into the duct 1, so that there is no problem of fiber oil agent stains around the interior of the duct or fiber catching due to seed meal, which is a problem of the conventional method. Also, no abnormal data is generated due to the above-mentioned fiber catching. Further, since the main body of the photoelectric sensor-4 can be attached to the outer surface of the duct 1 by suction with a magnet, the thread breakage detection sensor-2 can be removed from the duct 1 even if the surface of the sensor is dirty. The relevant sensor
You can wipe dirt on the surface. This is much easier than wiping the glass surface of the sensor mounted in the duct in the conventional method.

Further, in the present invention in which the thread-cutting fibers are collected and detected by the cotton swabs 3 and 31, the distance between the thread-cutting fiber and the detection surface of the photoelectric sensor-4 can be set close, so that the photoelectric sensor-4 can detect the detection distance. An inexpensive photoelectric switch type sensor of about 10 mm can be used, and control / processing that processes data
Since the calculation part can be a commercially available standard sequencer, it can be manufactured at an economical cost. Further, even when connecting to a computer by data communication, the standard parts are commercially available, so that the system can be easily constructed.

Further, since the number of thread cuttings is processed as a digital value by using the operation interval of the photoelectric sensor-4 which has detected the integrated cotton as a detection data, an abnormal value may be mixed in the data. Also, for example, the threshold value for determining the number of thread trimmings is compared with the detection data obtained by obtaining a plurality of moving average values to make a determination, so that the influence of the abnormal value can be suppressed to an extremely small level. is there.

[0032]

The present invention is as described above, and according to the conventional thread trimming detection device of the spinning machine, the thread trimming detection accuracy is low.
It greatly reduces the wasteful walking of yarn splicing workers, which is more than 50%, and greatly contributes to the improvement of work efficiency and labor. Incidentally, the conventional method of attaching a sensor to each spindle of a spinning machine having an enormous number of spindles is too expensive, and has not been widely used even more than 10 years after its development.

Therefore, the present invention can provide an economical and accurate yarn breakage detecting device required by the spinning industry. In addition to improving the work efficiency of the yarn splicing operator, it not only contributes to the reduction of labor, but also because the detection accuracy is extremely accurate, it is possible to accurately count the number of thread cuttings for each machine.
This aggregated information effectively contributes to early detection of malfunctioning machines and reduction of thread trimming. In addition, since the communication function is a standard product that can be easily added, an economical and efficient operation control is built so that an "automatic yarn splicer" that will be put into practical use in the near future can go straight to the thread cutting table. It is also a very useful element when doing.

[Brief description of drawings]

FIG. 1 is a perspective view of an example of a detection device of the present invention.

FIG. 2 is a perspective view of another example.

3 is a cross-sectional view of an embodiment of the apparatus of FIG.

4 is an enlarged side view showing a main part of a cotton swab in the device of FIG.

5 is a perspective view of a main part of another example of the cotton swab in the apparatus of FIG.

6 is an enlarged perspective view showing a main part of a cotton swab in the device of FIG.

FIG. 7 is a perspective view showing a state in which the cotton swab of FIG. 5 is opened.

FIG. 8 is a diagram showing the number of thread trimmings and the sensor thread trimming detection operation interface
A diagram showing the relationship between the bars.

FIG. 9 is a diagram showing the relationship between the number of thread cuttings and the blinking pattern of the display lamp.

FIG. 10 is a perspective view showing an example of a display unit of the method of the present invention.

FIG. 11 is a perspective view showing how short fibers are sucked into the spinning portion of the spinning machine.

FIG. 12 is a perspective view of an example of a conventional thread trimming detection device.

[Explanation of symbols]

 1 Duct 2 Thread breakage detection sensor-2a Base plate 3,31 Cotton swab 3a, 31a Cotton collecting part 4 Reflective photoelectric sensor-4a Support frame 4b Signal line

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naohisa Ogawa 600 Zenzaemon, Fujieda-shi, Shizuoka Nisshinbo Co., Ltd. Fujieda factory

Claims (13)

[Claims] 1. A thread-cutting fiber flowing in a duct of a spinning machine,
A thread trimming detection device, characterized in that a cotton swab mounted so as to be inclined in a flow direction is used to collect the accumulated cotton and a sensor detects that the accumulated cotton has reached a certain amount, and the accumulated cotton is removed. 2. The thread trimming detection device according to claim 1, wherein the cotton swab has a cotton swab formed in a hook shape or a clip shape. 3. The yarn trimming detection device according to claim 2, wherein the accumulated cotton is removed by injecting air to the hook-shaped portion of the cotton swab or opening the clip-shaped portion. 4. A detection device comprising a cotton swab having a cotton collecting portion and a thread trimming detection sensor arranged so as to face the cotton collecting portion, the detecting device being fixed to a hole formed on the upper surface or the side surface of the duct. −
Attach it to the duct by adsorbing it with a magnet etc.
The detector according to claim 1, wherein the detection device is detachably attached to the duct.
Thread trimming detector. 5. The thread trimming detection device according to claim 4, wherein the parallelism between the cotton swab and the duct is adjustable. 6. An operation interval in which a thread-cutting detection sensor, which is activated when a thread-cutting fiber is detected, is repeatedly operated, is measured in advance for each number of weights causing thread breakage,
A reference value of the operating interval of the sensor is formed in advance from the measured value for each number of thread cuttings, the operating interval of the sensor is detected during spinning, and this is compared with the reference value. A method for processing thread trimming detection data, characterized in that the occurrence of thread trimming and the number of thread trimmings are discriminated by the above. 7. The thread trimming detection data according to claim 6, wherein the reference value is a threshold value which is set to an average value of operating intervals of the thread trimming detecting sensors which operate corresponding to the respective number of thread trimmings. Processing method. 8. The processing method for thread trimming detection data according to claim 6, wherein the detected value during spinning is a moving average value of operating intervals detected by the thread trimming sensor a plurality of times. 9. The method for processing yarn trimming detection data according to claim 6, wherein the threshold value is changed according to spinning conditions such as the number of revolutions of the spinning machine and changes in the fiber raw material. 10. The method of processing thread breakage detection data according to claim 6, wherein the thread breakage indicator lamp of the machine stand is displayed by a different blinking pattern depending on the number of thread breaks. 11. The method for processing thread trimming detection data according to claim 6, wherein in the blinking pattern, the interval of sequential blinking is made faster or slower as the number of thread trimmings increases. 12. The processing method for thread trimming detection data according to claim 6, wherein the indicator lamp is composed of an illumination type push button, and an operator operates the lamp before and after joining to turn off the lamp. 13. The number of thread trimmings detected for each spinning machine is summed up by dividing the number of spinning machine groups into an appropriate number using a communication function, and the thread trimming status is “red”, “yellow”, “blue”. It is displayed as a wide area annunciator for each spinning condition, and at the same time, when the “red” display when a malfunction occurs for a certain time or more, the aggregate display of the spinning machine group is flickered. And a method of processing thread cutting data.