JPH08268643A - Fiber adhesion detecting method and device for rotary roller - Google Patents

Abstract

PURPOSE: To detect the adhesion of single fibers to a roller set up in high- temperature solution by measuring the width of fibers accounting for a bunch of fibers and detecting the adhesion of the fibers to the rotary roller when the measured value is reduced a preset amount or more. CONSTITUTION: An analog signal is received from a light receiving element for a CCD camera 2, converted into a digital signal, compared with a threshold value and given binary treatment that an output signal from the light receiving element to detect the width range W1-W3 of toes 1a-1c with small light entering amounts is zero and an output signal from the light receiving element to detect the gap width range W5-W8 of the toes with large light entering amounts is 1. The total number of light receiving elements is calculated when it is zero and the total width ΣW of the toe width W1-W3 is calculated by multiplying the total number by the toe width per light receiving element to measure the width of the toe at the exit. If the total width XW of the toe is reduced a preset amount or more, adhesion to be detected is defined.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber for detecting wrapping of a fiber around a rotary roller that transports a band-shaped fiber bundle (hereinafter referred to as a tow) composed of a large number of single fibers in a fiber manufacturing process. The present invention relates to a method and a device for detecting wrapping, and particularly to a method and a device for detecting fiber wrapping suitable for a treatment process using a large number of rotating rollers such as a heat treatment, a stretching treatment and a washing treatment.

[0002]

2. Description of the Related Art There are many known methods for detecting single fiber winding around a rotating roller that transports tows, and the following are representative methods.

For example, a light emitting device and a light receiving device are arranged opposite to each other at both ends of the roller so that an optical axis is provided along the surface of the roller in the axial direction of the roller, and a projection formed by winding a single fiber around the roller is an optical device. There is a transmission type photoelectric detection method that detects the occurrence of winding of single fiber around a roller by blocking the shaft.

Further, a reflection type photoelectric detector is installed so as to face the roller so that its optical axis is perpendicular to the roller surface, and when the single fiber is wound around the roller, the wound portion of the single fiber and the surface of the roller. There is a reflection-type photoelectric detection method that detects occurrence of winding of a single fiber around a roller by utilizing the fact that the reflectances of light with and are different from each other.

Further, the following mechanical system different from the above photoelectric system is also known. That is, a free roller having a minute diameter of about the same length as the roller length is installed in the vicinity of the roller surface in the axial direction of the roller, and when the single fiber is wound around the roller to form a projection of the single fiber, the free roller is formed. There is a roller system in which the protrusions come into contact with each other and the free roller rotates, so that the rotation of the free roller is detected by a proximity switch to detect the occurrence of winding of the single fiber around the roller.

Until now, these have been used.

[0007]

However, in the detection of single fiber winding around the rotating roller used in the processing steps such as tow washing and drying, the above-mentioned conventional method has the following various problems.

In the photoelectric method, when detecting the winding of the roller installed in the high temperature solution in the washing process, the detector is exposed to the high temperature solution, so that the electronic parts of the detector cannot withstand the high temperature and are waterproof. There is a problem that it is difficult to take measures and electrical insulation cannot be maintained. Further, when the solution is not transparent, there is a problem that the transmission of light is hindered and the winding of the single short fiber around the roller cannot be detected.

Even in the roller system, there are problems that it is difficult to waterproof the detector for detecting the rotation of the free roller, that the electric parts cannot withstand high temperatures, and that it cannot be detected stably due to the influence of the solution flow.

Further, both types basically need to be installed for each roller, and in a process using a large number of rollers, there is a problem that equipment investment cost becomes high.

The present invention solves the above problems and can detect the occurrence of winding of single fibers around a roller installed in a high-temperature solution or an opaque solution, which cannot be detected by the conventional detection method, and a large number of them can be detected. An object of the present invention is to provide a method and an apparatus for detecting fiber wrapping of a rotating roller, which can effectively detect the occurrence of single fiber wrapping around a roller in a process using the above roller.

[0012]

The above object can be achieved by the present invention described below. That is, the present invention consists of two inventions, one of which is a method for detecting fiber wrapping of a rotary roller for detecting fiber wrapping around a rotary roller that continuously transfers a band-shaped fiber bundle composed of a large number of single fibers. Rotation characterized by measuring the fiber width occupied by the fibers of the fiber bundle coming out of the roller, and detecting the fiber winding around the rotating roller as the occurrence of fiber winding around the rotating roller when the fiber width decreases by more than a predetermined amount. This is a method for detecting the fiber winding of the roller.

The other is an apparatus for carrying out the method invention, which detects the fiber wrapping of a rotary roller for detecting the fiber wrapping around a rotary roller that continuously transfers a band-shaped fiber bundle composed of a large number of single fibers. In the device, the output side width measuring means for measuring the fiber width of the fiber bundle provided on the output side of the rotating roller, and the decrease width of the output side width signal from the output side width measuring means is set to a preset value or more. A fiber wrapping detection device for a rotating roller, comprising: a fiber wrapping detection means for generating a fiber wrapping signal when the fiber wraps.

According to the present invention described above, the fiber width occupied by the fibers of the tow is stable during the transfer by the rotating roller, and when the winding of the fiber around the rotating roller occurs, that portion becomes a gap between the fibers of the tow, which is It was found that by measuring the fiber width, it can be detected at a response speed practically sufficient,
It was made.

The details of the present invention will be described below with reference to an embodiment in which the tow is washed with water.

[0016]

EXAMPLES FIG. 1 is an explanatory diagram of a tow water washing process step to which the example is applied, and FIG. 2 is a configuration diagram of the example.

In this step, as shown in FIG. 2, three bundles of tows 1a, 1b and 1c are transferred in parallel while being washed with water and transferred to a drying step. That is, toe 1a,
1b and 1c are sent to the tow cleaning device 10 by the tow feed roller 4 from the previous step (not shown). The tow cleaning device 10 is composed of a tank of hot water 11 which is supplied with water by a water supply device (not shown) to maintain a constant water surface and which is heated to a predetermined temperature by steam. Tow 1a, 1b, 1
c is warm water 1 by the rollers 5 to 9 of the tow cleaning device 10.
It is guided to the inside of 1, washed by a tow take-up roller 12, and sent to a heating roller type tow drying device 13. Tows 1a, 1b, 1c are tow drying devices 13
And dried and sent to the next step. As shown in the figure, many rollers are used in the steps of washing and drying the tow.

When winding of the single fiber around the roller occurs in a processing step including washing and drying of the tow,
Since the single fiber is wound around the roller and interferes with the production, the production is stopped and the operation of the short fiber is removed after the short fiber is wound around the roller. In addition, if the removal process is delayed and the amount of tow wrapped around the roller is large, the machine parts installed in the vicinity of the roller (eg, the brush for removing the single fiber wrapped around the roller) may be damaged. There is a problem of inviting. Further, it becomes a serious problem as a process trouble such as production of a product with abnormal quality.

On the other hand, in this embodiment, the outlet side of the water washing treatment step, specifically, the final roller 7 of the tow water washing device 10 is used.
2 is installed in the tow transfer path between the tow take-up roller 12 and the tow take-up roller 12, and the occurrence of fiber wrap around the roller in the washing process is automatically detected at an early stage. I will inform you. Therefore, the above-mentioned abnormality processing is surely performed early, and the above-mentioned problem is solved.

The fiber wrap detection device of the embodiment will be described below with reference to FIG. The detector of FIG. 2 shows a cross-sectional arrangement viewed from the line A of FIG. 1 in the tow transfer path on the outlet side of the water washing process step in which three bundles of tows 1a, 1b, and 1c are transferred in parallel.

As shown, the tows 1a, 1 of the tow transfer path
A one-dimensional CCD camera 2 with 5000 light-receiving elements is installed above b and 1c as a linear imaging means for measuring each width. The CCD camera 2 is installed so that the light receiving elements are arranged in a direction orthogonal to the traveling direction of the tows 1a, 1b, 1c, in other words, the width direction. Tow 1a, 1b, 1
A fluorescent lamp 3 having a commercial frequency of linear light source means for irradiating the same in the same direction as the arrangement direction of the light receiving elements of the CCD camera 2 is installed below c. The arc tube length L1 of the fluorescent lamp 3 is set so that the measurement width W9 of the CCD camera 2 is within the light emission stable area length L2 of the fluorescent lamp 3 because the light emission of the fluorescent lamp 3 is unstable at the left and right ends.

The amount of light entering the CCD camera 2 from the fluorescent lamp 3 depends on the toe widths W1 and W of the tows 1a, 1b and 1c.
In each of the regions 2 and W3, since the single fibers are in close contact with each other, the light is blocked by the tows 1a, 1b, 1c, and only a small amount of the background light is incident. Also, tow 1a, 1
Toe gap widths W5, W6, W in regions where b and 1c do not exist
The amount of incident light in each of the areas 7 and W8 is large because the light from the fluorescent lamp 3 directly enters. Then, as is well known, the CCD camera 2 uses the 5000 light receiving elements for detecting each area to convert into an analog electric signal proportional to the amount of incident light and sequentially output.

The controller 21 of the CCD camera is a computer equipped with an interface circuit,
The following output side width measuring means and winding detection means are configured to be sequentially executed in a predetermined cycle.

That is, the outlet width measuring means has the following structure. Each of the analog electric signals is received from 5000 light receiving elements of the CCD camera 2 and A / D converted. Then, as compared with a preset threshold value, the output signal of the light receiving element for detecting the areas of the toe widths W1, W2, and W3 of the tows 1a, 1b, and 1c having a small light incident amount is "0", and the toe gap width W5 having a large light incident amount is , W, 6, W7, and W8 are detected, the output signal of the light receiving element is binarized to be "1". Next, the total number of the light receiving elements of the CCD camera 2 which has become “0” by the binarization process is calculated, and this total number is multiplied by the tow width per one light receiving element obtained in advance, and the toe 1a, 1b is obtained. The toe total width ΣW of the toe widths W1, W2, and W3 of 1c is calculated, and the toe outlet width is measured. The measured value of the toe total width ΣW is converted into an analog signal and sent to the analog recorder 22 for recording. Therefore, the analog recorder 22 always records the analog value of the current tow total width ΣW.

The winding detection means compares the reduction width of the tow total width ΣW measured by the output side width measurement means with a preset setting value, and when the tow total width ΣW decreases below the set amount, the winding detection means Detect as occurrence. Upon detection, it is determined that the tow feed roller 4 or the tow cleaning device 10 is wrapped around the fiber, and a detection signal is output to the alarm signal processing device 23 and the alarm broadcasting device 24.

When the alarm signal processing device 23 receives the winding detection signal, the alarm signal lamp 24 is turned on. When the alarm broadcasting device 24 receives the winding detection signal, the alarm broadcasting device 24 activates and amplifies the audio alarm, and then the speaker 24 gives an audio alarm.

According to the above-described embodiment, the winding around 11 rollers in the washing step including the winding around the rollers 8 and 9 in the warm water 11 which is difficult in the conventional method can be quickly detected by one winding detecting apparatus. Since it is automatically detected and notified by, the troubles associated with the winding of the fiber around the roller are eliminated.

By the way, the present invention is not limited to the above-mentioned embodiments, but can be modified into the following various modes as required.

When there is a temporary gap between the single fibers of the tows 1a, 1b, 1c for a short time, which may cause false alarm of the winding alarm signal, the winding detection means Tow total width ΣW in wrap detection
By detecting when the decrease continues for a predetermined time or more as the occurrence of wrapping, it is possible to perform reliable detection without such false alarm.

When the tow widths W1, W2, W3 are varied, a tow width is controlled without restriction by providing a regulating guide on the upstream side in the vicinity of the detection position of the tow transfer path. By restricting the width to be slightly narrower than the width, fluctuation can be prevented and stable and highly reliable detection can be performed. It should be noted that this regulation guide is also effective in suppressing the above-described temporary gap generation.

The tow cleaning device 1 is used in this embodiment.
Although the outlet side width measuring means is provided only on the outlet side of 0, the following can be performed to detect the winding of the single fiber around only the rollers 5 to 9 of the tow cleaning device 10. The entrance side width measuring means having the same configuration as the exit side width measuring means is also installed on the entrance side of the tow cleaning device 10, and the total toe width ΣW of the entrance side is set.
Measure I and outgoing toe total width ΣWO. Then, the wrap detection means is provided with a difference calculation means for subtracting the tow total width ΣWI on the outgoing side from the total tow width ΣWI on the incoming side, and detects a case where the subtraction value exceeds a preset value as wrapping occurrence. By doing so, even if the winding of the single fiber occurs on the tow feed roller 4, it is possible to detect the winding occurrence of only the rollers 5 to 9 of the tow cleaning device 10 without being affected. This configuration has a great effect in terms of detection stability and reliability even when there is a change in the toe width in the previous step.

By the way, in the present invention, it is necessary to accurately measure the width of the tow, and in the present embodiment, the tow width of the tow is measured by the one-dimensional CCD camera of the transmission type which is not easily affected by the ambient light and can be detected stably. Although the width is detected, it is needless to say that the reflection method can also be detected if the lightness and darkness of the toe and the background are large, and the reflection method can also be applied to the present invention.

Further, as described above, the non-contact CCD camera is used for measuring the tow width in this embodiment, but any type of contact or non-contact type camera may be used. It is also clear from the gist of the present invention that any measuring means capable of measuring the tow width can be applied to the present invention.

Further, in this embodiment, the case where three bundles of tows are processed in parallel has been shown, but the number of bundles of tows to be processed is not limited in the present invention, and one to three or more bundles can be applied. It is clear from the meaning of.

[0035]

As described above, according to the present invention, by measuring the fiber width of the tow on the roller exit side and detecting the wrapping due to the decrease in the width, the tow can be detected in the synthetic fiber manufacturing process which was difficult to detect in the conventional example. It is designed to detect the wrapping of single fibers around a roller installed in a high temperature aqueous solution or opaque aqueous solution that is often used in the washing and drying processes of the existing fibers. The effect that the inspection work by means of labor saving is great.

Further, it becomes possible to early and automatically detect the winding of the monofilament around the roller installed in the high temperature aqueous solution or the opaque aqueous solution, and the discovery of the occurrence of the monofilament winding around the roller is delayed, so that the roller is close to the roller. It is also possible to obtain an effect that accidents such as damage to installed machine parts (eg, brush for removing monofilament wrapped around rollers) can be reliably prevented.

Further, according to the present invention, it is possible to detect the winding of the monofilament around any one of a large number of rollers, and the capital investment cost can be reduced as compared with the conventional example which must be provided for each roller. The effect can be greatly reduced, and a great effect can be obtained particularly in a manufacturing process of processing synthetic fiber in a tow shape that does not require detection of winding around each roller.

As described above, the present invention greatly contributes to the rationalization of the manufacturing process.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a tow water washing process step to which an example is applied.

FIG. 2 is an explanatory diagram of a configuration of an example of the present invention.

[Explanation of symbols]

 1a to 1c tow 2 CCD camera 3 fluorescent lamp 4 tow feed roller 5 to 9 roller 10 tow cleaning device 12 tow take-up roller 13 tow drying roller 21 controller 22 analog recorder 23 alarm signal processing device 24 alarm indicator light 25 alarm broadcast device 26 Speaker

Claims (11)

[Claims] 1. A fiber occupancy detection method for a rotary roller, which detects fiber wrapping around a rotary roller that continuously transports a band-shaped fiber bundle composed of a large number of single fibers, and a fiber occupied by the fibers of the fiber bundle output from the rotary roller. Measure the width,
A fiber winding detection method for a rotating roller, wherein fiber winding around the rotating roller is detected when the fiber width is reduced by a predetermined amount or more, and the fiber winding around the rotating roller is detected. 2. The fiber width of the fiber bundle is measured on the outgoing side and the incoming side of the rotary roller, and the measured value on the outgoing side is subtracted from the measured value on the incoming side to obtain the difference, and the difference is a predetermined amount. The method for detecting fiber wrapping of a rotary roller according to claim 1, wherein the fiber wrapping around the rotary roller occurs when the number of fibers increases. 3. The method for detecting fiber wrapping of a rotary roller according to claim 1, wherein the fiber wrapping occurs on the rotary roller when a decrease in the fiber width of the fiber bundle by a predetermined value or more continues for a predetermined time or more. 4. A fiber wrap detection device for a rotary roller that detects fiber wrap around a rotary roller that continuously transports a band-shaped fiber bundle composed of a large number of single fibers. Outgoing width measuring means for measuring the fiber width of the, and winding detection means for generating a fiber winding signal when the decrease width of the outgoing width signal from the outgoing width measuring means is equal to or more than a preset value. A fiber winding detection device for a rotating roller, which is provided with: 5. An entrance side width measuring means for measuring the fiber width of the fiber bundle is provided on the entrance side of the rotating roller, and the entrance side width signal and the exit side width signal from the entrance detecting means are included. 5. The fiber winding around the rotary roller according to claim 4, further comprising a difference calculating means for calculating a difference between the rotating roller and a fiber winding signal when the difference signal from the difference calculating means exceeds the set value. Detection device. 6. The wrapping detection means is configured to generate a fiber wrapping signal when the decrease width of the output side width signal or the difference signal continues for a predetermined time or more and exceeds the set value. Item 4. A device for detecting fiber wrapping of a rotating roller according to Item 4 or 5. 7. The width measuring means comprises a linear light source means arranged on one side of the fiber bundle and having a length equal to or larger than the width, and a linear light source means arranged on the other side so as to face the linear light source means. The fiber wrapping detection device for a rotary roller according to any one of claims 4 to 6, which is a light-transmitting type measuring means which is an image pickup means. 8. The fiber winding detection of the rotary roller according to claim 4, wherein a regulation guide for regulating the width of the fiber bundle is provided on the upstream side of the detection position of the width measuring means of the fiber bundle transfer path. apparatus. 9. The method for detecting fiber winding of a rotating roller according to claim 1, wherein the rotating roller is a rotating roller group including a plurality of rotating rollers.
A fiber winding detection device for the rotating roller according to any one of items 1 to 8. 10. The method for detecting fiber wrapping of a rotary roller according to claim 1, wherein the fiber bundle is a plurality of fiber bundles transferred in parallel, or the rotary roller according to claim 4. Fiber wrap detection device. 11. The method of detecting fiber wrapping of any of the rotating rollers according to claim 1, wherein the rotating roller is a rotating roller in a liquid, or the detection of fiber wrapping of any of the rotating rollers of claim 4 to 10. apparatus.