JP3205208B2 - Method and apparatus for detecting winding of fiber around rotating roller - Google Patents

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 winding of a fiber around a rotary roller for transferring a band-shaped fiber bundle (hereinafter referred to as tow) composed of a plurality of single fibers in a fiber manufacturing process. The present invention relates to a winding detection method and apparatus, and more particularly to a fiber winding detection method and apparatus suitable for a processing step using a number of rotating rollers, such as a heating process, a stretching process, and a cleaning process.

[0002]

2. Description of the Related Art As a method for detecting winding of a single fiber around a rotating roller for transferring a tow, many methods have already been known, and the following are typical examples.

For example, a light-emitting device and a light-receiving device are arranged at both ends of a roller so as to have an optical axis in the vicinity of the roller surface in the axial direction of the roller. There is a transmission type photoelectric detection method that detects the occurrence of winding of a single fiber around a roller by blocking an axis.

In addition, a reflection type photoelectric detector is installed facing a roller so that its optical axis is perpendicular to the roller surface, and when a single fiber is wound around the roller, the wound portion of the single fiber and the roller surface There is a reflection-type photoelectric detection method which detects the occurrence of winding of a single fiber around a roller by utilizing the fact that the reflectance of light is different.

Further, the following mechanical system different from the above photoelectric system is also known. That is, a free roller having a small diameter approximately the same length as the roller length is installed in the vicinity of the roller surface along the roller surface in the axial direction of the roller. There is a roller system in which the protrusions come into contact with the free roller 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 a single fiber around the roller.

Heretofore, these have been used.

[0007]

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

In the photoelectric system, in detecting the winding of a roller installed in a high-temperature solution in a washing process, the detector is exposed to a high-temperature solution, so that the electronic components of the detector cannot withstand high temperatures. There are problems 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 it is not possible to detect the winding of the single short fiber around the roller.

The roller system also has problems such as difficulty in waterproofing the detector for detecting the rotation of the free roller, inability of the electric parts to withstand high temperatures, and inability to stably detect the influence of the flow of the solution.

[0010] Further, both types basically need to be installed for each roller, and there is a problem that equipment investment is expensive in a process using a large number of rollers.

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

[0012]

The above objects are achieved by the present invention described below. That is, the present invention comprises two inventions, one of which is a method for detecting a fiber wrapping of a rotary roller that detects a fiber wrapping around a rotary roller that continuously transfers a belt-shaped fiber bundle made up of many single fibers. Measuring the fiber width occupied by the fibers of the fiber bundle coming out of the roller, and, when the fiber width is reduced by a predetermined amount or more, as the occurrence of fiber winding on the rotating roller, detecting the fiber winding on the rotating roller. This is a method for detecting winding of a fiber around a roller.

The other is an apparatus for carrying out the method of the present invention, which detects the fiber winding of a rotating roller for detecting the winding of a fiber around a rotating roller for continuously transferring a band-shaped fiber bundle composed of a large number of single fibers. In the apparatus, an output side width measuring means for measuring the fiber width of the fiber bundle provided on the output side of the rotating roller, and a decrease width of the output side width signal from the output side width measuring means is equal to or more than a preset value. And a winding detecting means for generating a fiber winding signal when the rotation of the rotating roller has occurred.

According to the present invention described above, the fiber width occupied by the tow fibers is stable during transfer by the rotating roller, and when the winding of the fiber around the rotating roller occurs, that portion becomes a gap between the tow fibers, which is By measuring the fiber width, we found that it was possible to detect with a practically sufficient response speed,
It was done.

Hereinafter, the present invention will be described in detail based on an embodiment in which the present invention is applied to a tow washing process.

[0016]

FIG. 1 is an explanatory view of a tow washing process to which the embodiment is applied, and FIG. 2 is a configuration diagram of the embodiment.

In this step, as shown in FIG. 2, the three bundles of tows 1a, 1b, and 1c are washed while being transferred in parallel, and then 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 a preceding step not shown. The tow washing device 10 is constituted by a tank of hot water 11 which is supplied with water by a water supply device (not shown) to maintain a constant water level and is heated to a predetermined temperature by steam. Toe 1a, 1b, 1
c is hot water 1 by the rollers 5 to 9 of the tow washing device 10.
It is guided into 1, washed, taken up by a tow take-up roller 12, and sent to a heated roller type tow dryer 13. Tow 1a, 1b, 1c is tow drying device 13
And sent to the next step. As shown in the figure, a number of rollers are used in the steps of washing and drying the tow.

When winding of a single fiber around a roller occurs in processing steps including washing and drying of the tow,
Since the single fiber is wound around the roller and hinders production, the production is suspended and the operation is resumed after removing the short fiber wrapping around the roller. In addition, such removal processing is delayed, and if the amount of tow wrapping around the roller increases, mechanical parts installed near the roller (eg, a single-fiber wrapping removal brush around the roller) may be damaged. There are problems such as invitation. Furthermore, it becomes a serious problem as a process trouble such as production of a product having abnormal quality.

On the other hand, in the present embodiment, the exit side of the water washing process, specifically,
The following fiber winding detection device shown in FIG. 2 according to the present invention is installed in the tow transfer path between the tow take-up roller 12 and the tow take-off roller 12, and automatically detects the occurrence of fiber winding on the roller in the washing process in the early stage. I am trying to inform you. Therefore, the above-described abnormality processing is reliably performed at an early stage, and the problem is solved.

Hereinafter, a fiber winding detection apparatus according to an embodiment will be described with reference to FIG. The detecting unit in FIG. 2 shows a cross-sectional arrangement as viewed from the line A in FIG. 1 in a tow transfer path on the exit side of the washing processing step, in which three bundles of tows 1a, 1b, and 1c are arranged and transferred in parallel.

As shown, the tows 1a, 1
Above b and 1c, a one-dimensional CCD camera 2 having 5000 light receiving elements is installed as a linear imaging means for measuring each width. The CCD camera 2 is installed such that the arrangement direction of the light receiving elements is at right angles to the running direction of the tows 1a, 1b, 1c, in other words, the width direction. Toe 1a, 1b, 1
Below line c, a fluorescent lamp 3 of commercial frequency of a line light source means longer than its full width for irradiating light in the same direction as the arrangement direction of the light receiving elements of the CCD camera 2 is provided. The light emitting 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 emitting stable region length L2 of the fluorescent lamp 3 because the light emission of the fluorescent lamp 3 is unstable at both left and right ends.

The amount of light entering the CCD camera 2 from the fluorescent lamp 3 is determined by the toe widths W1 and W1 of the toes 1a, 1b and 1c.
In each of the regions 2 and W3, since the single fibers are present in close contact with each other, the light is blocked by the tows 1a, 1b, and 1c, and only a small amount of light enters the background light. Also, toe 1a, 1
Toe gap widths W5, W6, W in areas where b, 1c do not exist
The amount of light entering 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 the respective regions to convert the signals into analog electric signals proportional to the amount of incident light and sequentially output the signals.

The controller 21 of the CCD camera comprises a computer having an interface circuit.
The following output side width measuring means and winding detection means are configured to be sequentially executed at a predetermined cycle.

That is, the outlet width measuring means has the following configuration. Each analog electric signal is received from 5000 light receiving elements of the CCD camera 2 and A / D converted. The output signal of the light receiving element detecting the toe widths W1, W2, and W3 of the toes 1a, 1b, and 1c having a small incident light amount is "0", and the toe gap width W5 having a large incident light amount is compared with a preset threshold value. , W, 6, W7 and W8 are binarized by setting the output signal of the light receiving element to "1". Next, the total number of light receiving elements of the CCD camera 2 which has become “0” by the binarization processing is calculated, and this total number is multiplied by a previously determined toe width per light receiving element, tow 1a, 1b Calculate the toe total width の W of the toe widths W1, W2, and W3 of 1c, and measure the toe exit side width. The measured value of the tow total width ΔW is converted into an analog signal, sent to the analog recorder 22, and recorded. Accordingly, the analog recorder 22 constantly records the current analog value of the toe total width ΔW.

The wrap detecting means compares the decrease width of the toe total width ΣW measured by the outlet width measuring means with a preset value, and when the tow total width ΣW exceeds the set amount, the wrapping is detected. Detected as occurrence. When it is detected, the detection signal is output to the alarm signal processing device 23 and the alarm broadcasting device 24, assuming that the winding of the fiber has occurred in any of the tow feed roller 4 and the tow cleaning device 10.

The alarm signal processor 23 turns on the alarm indicator lamp 24 upon receiving the winding detection signal. When receiving the winding detection signal, the alarm broadcasting device 24 activates and amplifies an audio alarm, and then notifies the speaker 24 of the alarm by audio.

According to the above-described embodiment, winding around 11 rollers in the washing step can be quickly performed by one winding detecting device, including detection of winding around the rollers 8 and 9 in the hot water 11, which was difficult in the conventional method. Automatically detected and notified, so that troubles associated with thickening of the fiber wound on the roller were eliminated.

By the way, the present invention is not limited to the above-described embodiment, but may be variously modified as required.

If a short time gap is generated between the single fibers of the tows 1a, 1b, and 1c, which may cause a false alarm of the winding alarm signal, the winding detecting means In detection of wrap, total tow width ΣW
By detecting a case where the above-mentioned decrease continues for a predetermined time or more as the occurrence of winding, reliable detection without such false alarm can be performed.

When the tow widths W1, W2, W3 fluctuate, a regulating guide for regulating the width is provided near the detection position of the tow transfer path on the upstream side thereof so that the tow width is unregulatedly transferred. By restricting the width slightly smaller than the width, the fluctuation is prevented, and stable and reliable detection can be performed. This regulation guide is also effective in suppressing the above-mentioned temporary gap generation.

In this embodiment, the tow cleaning device 1 is used.
Although the exit width measuring means is provided only on the exit side of No. 0, winding of the single fiber around only the rollers 5 to 9 of the tow cleaning device 10 may be detected as follows. An entrance width measuring unit having the same configuration as the exit width measuring unit is also installed on the entrance side of the tow cleaning device 10, and the total width of the tow on the entrance side is ΣW.
Measure I and the total width of the outgoing toe Σ WO. In the winding detecting means, there is provided a difference calculating means for subtracting the total width of the toe on the incoming side ΣWI from the total width of the toe on the outgoing side ΣWI, and a case where the subtraction value exceeds a preset value is detected as the occurrence of the winding. By doing so, even if the single fiber wraps around the tow feed roller 4, it is possible to detect the wrapping 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 the tow width fluctuates in the previous process.

In the present invention, it is necessary to accurately measure the width of the tow. In the present embodiment, the tow width is measured by a transmission type one-dimensional CCD camera which is not easily affected by disturbance light and can be stably detected. The width is detected. However, if the contrast between the toe and the background is large, the width can be detected by the reflection method. Needless to say, the reflection method can be applied to the present invention.

As described above, in the present embodiment, a non-contact CCD camera is used for measuring the toe width. However, regardless of the contact type or the non-contact type, any method may be used. It is 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 is shown. However, in the present invention, the number of bundles of tows to be processed is not limited at all, and the present invention can be applied to one bundle to three or more bundles. It is clear from the purpose of this.

[0035]

As described above, the present invention measures the fiber width of the tow on the exit side of the roller and detects the winding based on the decrease in the width. It is designed to detect the winding of a single fiber around a roller installed in a high-temperature aqueous solution or an opaque aqueous solution that is often used in the washing and drying processes of fibers in the state, and it is necessary to manually detect the occurrence of winding. The effect of labor-saving inspection work by the operator is great.

In addition, early automatic detection of winding of a single fiber around a roller installed in a high-temperature aqueous solution or an opaque aqueous solution becomes possible, and the discovery of occurrence of winding of a single fiber around a roller is delayed. It is also possible to obtain an effect of reliably preventing accidents such as damaging installed mechanical parts (eg, a brush for removing a single fiber wound around a roller).

Further, according to the present invention, it is possible to detect whether a single fiber has been wound around any of a number of rollers by a single unit. Can be greatly reduced, and a great effect can be obtained particularly in the manufacturing process of processing the synthetic fiber in a tow shape that does not require detection of winding in a roller unit.

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

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a tow washing process to which an embodiment is applied.

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

[Explanation of symbols]

 1a-1c Toe 2 CCD camera 3 Fluorescent lamp 4 Tow feed roller 5-9 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)

(57) [Claims] 1. A method for detecting winding of a fiber on a rotating roller for continuously transferring a belt-like fiber bundle composed of a large number of single fibers, wherein the fiber occupied by the fibers of the fiber bundle exiting from the rotating roller. Measure the width,
A method for detecting winding of a fiber on a rotating roller, wherein the case where the fiber width is reduced by a predetermined amount or more is regarded as occurrence of winding of the fiber on the rotating roller, and the winding of the fiber on the rotating roller is detected. 2. The fiber width of a fiber bundle is measured on each of an outlet side and an inlet side of a rotating roller, and the measured value on the outlet side is subtracted from the measured value on the inlet side to determine the difference. The method according to claim 1, wherein the case where the rotation is increased is regarded as occurrence of fiber winding around the rotating roller. 3. The method according to claim 1, wherein when the decrease in the fiber width of the fiber bundle by a predetermined value or more continues for a predetermined time or more, the winding of the fiber around the rotating roller occurs. 4. A fiber winding detection device for a rotating roller, which detects winding of a fiber around a rotating roller for continuously transferring a belt-shaped fiber bundle made of a large number of single fibers, the fiber bundle provided on an output side of the rotating roller. Outgoing width measuring means for measuring the fiber width of, and winding detecting 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 greater than a preset value. A fiber winding detection device for a rotary roller, comprising: 5. An entrance width measuring means for measuring a fiber width of a fiber bundle on an entrance side of a rotating roller, and an entrance width signal and an exit width signal from the entrance width measurement means to the winding detection means. 5. A fiber winding around the rotary roller according to claim 4, wherein a difference calculating means for calculating a difference between the fiber winding is provided, and a fiber winding signal is generated when a difference signal from the difference calculating means is equal to or more than the set value. Detection device. 6. The fiber wrapping detection means for generating a fiber wrapping signal when the decreasing width of the output side width signal or the difference signal exceeds the set value continuously for a predetermined time or more. Item 6. A fiber winding detection device for a rotary roller according to item 4 or 5. 7. A linear light source arranged on one side of the fiber bundle and having a length equal to or longer than the width thereof, and a linear measuring means arranged on the other side of the fiber bundle so as to face the line light source. The fiber winding detection device for a rotary roller according to any one of claims 4 to 6, wherein the detection device is a light transmission type measurement unit such as an imaging unit. 8. The fiber winding detection of a rotary roller according to claim 4, wherein a regulation guide for regulating the width of the fiber bundle is provided upstream of the detection position of the width measuring means in the fiber bundle transfer path. apparatus. 9. The method according to claim 1, wherein the rotating roller is a rotating roller group including a plurality of rotating rollers.
9. A fiber winding detection device for a rotary roller according to any one of claims 8 to 8. 10. The method according to claim 1, wherein the fiber bundle is a plurality of fiber bundles that are transferred in parallel. Fiber winding detection device. 11. The method according to claim 1, wherein the rotating roller is a rotating roller in liquid, or the method according to claim 4, wherein the rotating roller is a rotating roller in a liquid. apparatus.