JPH07102941B2 - Winding monitoring equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION “Industrial field of application” The present invention relates to a residual yarn state and a yarn breakage state when producing a product such as roving by winding a plurality of yarns such as glass strands and winding them. The present invention relates to a winding monitoring device for monitoring.

"Prior Art" Conventionally, a roving has been manufactured in which fibers obtained by melt-spinning glass are bundled to form a strand, and the strand is uniformly aligned and bundled to have a predetermined count. Roving is widely used as a material for FRP substrates and roving cloth.

By the way, generally, the roving is manufactured by using a cake obtained by winding fibers obtained by melt-spinning glass into a strand and winding the strand. That is, it is manufactured by arranging a large number of cases on a creel table, drawing a strand from each cake, and winding the strands with a winder while aligning the strands.

When the yarn is pulled out from a plurality of cakes and wound in this way, the total length of the yarn wound around each cake varies, and the timing of replacement differs for each cake.

Conventionally, the above-mentioned cake replacement timing or confirmation of yarn breakage has been performed visually. For this reason, the worker must constantly monitor the yarn alignment state, which requires complicated work.

In order to deal with this, it is conceivable to measure the cake replacement timing with a weighing machine such as a spring balance and replace it when the weight is below the set weight. A large weight error is likely to occur due to variations in tension, and there is a problem in measurement accuracy.

Further, as the yarn breakage detecting means, a drop wire method, a vibration detecting method, an optical detecting method and the like have been conventionally known. These are described below.

Drop Wire Method For example, as disclosed in U.S. Pat. No. 3,361,375, a thread is pulled up by a drop wire and pulled out under a tension, and a state where the wire falls when the thread is broken is optically (non-contact type), or Although it is a mechanical (contact type) detection method, there is a problem that tension is applied to the yarn, which causes damage and causes the thread to fall.

Vibration detection method For example, as disclosed in U.S. Pat.No. 3,966,132, the string vibration generated when the yarn is pulled out is detected by a contact type, and there is a problem that the yarn is likely to be damaged during contact. , The part that electrically converts the string vibration (micro switch, pickup part, etc.) is prone to failure, and there is a problem in service life.

Optical detection method For example, as disclosed in U.S. Pat.Nos. 4,010,908 and 4,233,520, light is projected onto a thread, and the reflected light or the transmitted light is sensed to detect a thread breakage by a non-contact method. Since it is a non-contact type, it does not damage the thread, but it removes dirt such as light emitting element, light emitting surface of light receiving element, fluff that adheres to the light receiving surface, and replacement with long life. There is a drawback that a large amount of cost is required for maintenance.

[Problems to be Solved by the Invention] The present invention has been made in view of the problems of the above-mentioned conventional techniques, and an object thereof is to prevent a yarn wound on a cake from being damaged and to prevent a failure. It is an object of the present invention to provide a winding monitoring device which is small in number, can be made maintenance-free, and has a simple structure and can be downsized.

[Means and Actions for Solving the Problem] In order to achieve the above object, the winding monitoring device of the present invention includes a weight sensor for detecting a cake weight, and a residual yarn weight and a yarn breakage based on an output signal of the weight sensor. A cake state monitoring processing means for detecting the state, and a cake state alarm processing means for outputting a residual thread alarm and a thread break alarm according to the residual thread weight and the thread breakage status detected by the cake status monitoring processing means, The cake state monitoring processing means takes in the output signal of the weight sensor every 1/5 to 1/50 seconds and calculates an average of 20 to 100 pieces thereof, and the moving average processing means calculates the average. The weight of the cake is read every predetermined time, the weight of the cake this time is compared with the weight of the previous cake, and if the amount of decrease is less than the set value, the thread break warning signal is output. When the cake weight calculated by the processing means and the moving average processing means is read every predetermined time, the cake weight is compared with a preset residual thread limit weight, and the cake weight is equal to or less than the residual thread limit weight. And a residual thread warning processing means for outputting a residual thread warning signal.

According to the present invention, the output signal of the weight sensor is taken in every 1/5 to 1/50 seconds by the moving average processing means, and 20 to 1
By calculating the average of 00 pieces, the weight change of the cake can be accurately calculated without being affected by the disturbance generated when the yarn is pulled out from the cake.

Then, by the yarn breakage determination processing means, the cake weight calculated by the moving average processing means is read every predetermined time,
By comparing the cake weight of this time with the cake weight of the previous time, the yarn breakage state can be detected. That is, when yarn breakage occurs, the cake weight does not decrease. Therefore, when the amount of decrease is less than the set value, it is determined that yarn breakage has occurred, and a yarn breakage alarm signal is output. Since the yarn breakage is monitored by the weight of the cake in a non-contact manner as described above, fluffing can be prevented in advance without damaging the yarn wound around the cake, and high quality roving can be obtained.

Further, by the residual thread warning processing means, the cake weight calculated by the moving average means is read every predetermined time, and this cake weight is compared with a preset residual thread limit weight, and the cake weight is equal to or less than the residual thread limit weight. In the case of, the residual thread alarm signal is output. In this way, since the remaining yarn amount and the yarn breakage can be monitored simultaneously by one system, the structure can be simplified and the overall size of the device can be reduced.

Furthermore, since only cake weight is measured, there is no need to use a light emitting device such as weight, environmental consideration is unnecessary, there are few failures, maintenance is free, and a long service life is achieved.

Then, as described above, since it is possible to accurately calculate the weight change of the cake without being affected by the disturbance generated when the yarn is pulled out from the cake, it is possible to accurately determine the thread breakage state and the cake replacement time. You can

"Embodiment" FIG. 4 shows an overall schematic view of a winding monitoring apparatus embodying the present invention.

A strand (hereinafter referred to as a thread) is previously provided on the creel base 1.
A plurality of cakes 2 wound in a twill shape are arranged, and each cake 2 is placed on the weight sensor 3.

As the weight sensor 3, for example, a load cell is used, and the cake weight is electrically detected from the potential difference caused by the change in bridge resistance.

Further, the yarn wound around each of the cakes 2 is drawn out from the inner surface side and aligned through the guide member 4, and the winding machine 5
It is converged by the tensioner 6 provided in the
And is wound in a twill shape on the spindle 8 mounted on the winding machine 5. Rotation / stop of the spindle 8 is controlled by a motor drive unit 9.

(Circuit weight processing means circuit configuration) On the other hand, reference numeral 10 is a cake weight processing means (weight sensor controller) which is an image width device 11 connected to the weight sensor 3.
A / D converters 12 connected to the image width device 11 are provided as independent modules in the number corresponding to the cake 2. Since the number of the cakes 2 increases and decreases depending on the type of the roving 7 (the number of yarns to be bundled), the amplifier 11 and the A / D converter 12 are independent modules to cope with this.

Further, the CPU (central processing unit) 13 of the cake weight processing means (weight sensor / controller) 10, the A / D converter
12, I / O interface 14, ROM 15, and RAM 16 are connected via a bus line 17. In addition, the above I / O
The reset switch 19 of the operation unit 18 is connected to the input side of the interface 14. Also, the above I / O interface 1
On the output side of 4, the motor drive section 9 of the winding machine 5, the thread breakage lamp 20a of the alarm display section 20, the residual thread warning lamp 20b, and the buzzer
20c and the thread breakage indicator lamp 2 provided on the operation section 18
1 is connected respectively.

The yarn breakage indicator light 21 indicates which cake the yarn breaks depending on the lighting position.

Further, a weight sensor / controller setting device 22 is connected to the cake weight processing means (weight sensor / controller) 10. This weight sensor controller setting device
Reference numeral 22 has a key switch 22a and an indicator 22b. The set values W _L , W _LL (see FIG. 3) for the first remaining thread alarm and the second remaining thread alarm, and the remaining value per unit time for judging thread breakage Variable value of yarn weight K _O ,
Also, the integration time of the output signal of the weight sensor 3 can be arbitrarily set by inputting the key switch 22a. The weight sensor controller setting device 22 can be used to calibrate the output value of the weight sensor 3 and the like.
The display 22b can display the weight value of each channel.

Cake weight processing means (weight sensor controller)
The ROM 15 of 10 stores arithmetic programs and various fixed data. In the RAM 16, the cake weight after data processing is temporarily stored in a predetermined address.
Further, the CPU 13 calculates various processing data based on the data stored in the RAM 16 according to the calculation program stored in the ROM 15.

(Functional Configuration of Cake Weight Processing Means) As shown in FIG. 1, the cake weight processing means (weight sensor / controller) 10 is composed of cake state monitoring processing means 23 and cake state alarm processing means 24.

The cake state monitoring means 23 is provided corresponding to the weight sensor 3, and is composed of a moving average processing means 25, a yarn breakage determination processing means 26, and a residual yarn warning processing means 27.

The moving average processing means 25 calculates the moving average value of the output signal of the weight sensor 3 per unit time, and calculates the cake weight W _t from this moving average value.

That is, a colored portion due to binder migration is formed on the outside of the cake 2 in the drying process. A thread is pulled out from the cake 2 so that the cake weight has a predetermined value (for example,
If the amount is 100 to 200 g or less, the yarn will be close to the above migration portion and the yarn separation from the cake 2 will be poor. As a result, the back tension increases, and the weight sensor 3
As shown in FIG. 2 (a), the output signal of No. 2 has a large vibration as the weight decreases.

The vibration of the cake 2 occurs because the direction of the back tension changes depending on the position where the yarn is separated. For example, as shown in FIG. 2 (b), when the yarn on the upper side A of the cake 2 is pulled out, a force acts downward in the figure, and the apparent weight applied to the weight sensor 3 is as shown in FIG. 2 (a). As shown in A, when the yarn on the lower side B of the cake 2 is pulled out, a force acts upward in the figure, and the apparent weight applied to the weight sensor 3 becomes B in FIG. 2 (a). Lightens as shown. As a result, a few Hz (for example, 5 to 5
Vibration of 0 to 50g at 8Hz).

Since the instantaneous value of this amplitude is considered to be the same both above and below, the true cake weight without disturbance can be obtained by calculating the moving average for several seconds. Specifically, the output signal of the weight sensor 3 is taken in every 1/5 to 1/50 sec, which is the calculation cycle, and the average of 20 to 100 thereof is calculated.

In the yarn breakage determination processing means 26, the cake weight W _t calculated by the moving average processing means 25 is read every predetermined time (for example, 3 seconds), and the present cake weight W _t and the previous cake weight W _t are read.
Compared with _t-3 , the amount of decrease is set value K _O (after 1-5
g / 3sec) or less, it is determined that the thread is broken and a thread break alarm signal is output.

The residual yarn alarm processing unit 27 reads the cake weight W _t calculated in the moving average processing unit 25, a first residual thread limit weight W _L set in advance and this cake weight W _t (e.g., 200-250
g) or the second residual thread weight limit W _LL (for example, 100-1
50g) and the cake weight W _t is the first residual thread limit weight.
If W _L or the second remaining thread limit weight W _LL or less, the remaining thread limit is judged and the remaining thread alarm or the remaining thread alarm is output.

The first residual thread limit weight W _L indicates a state where the cake 2 has approached the migration portion, and the second residual thread limit weight W _L
W _LL indicates the state where the migration portion of cake 2 is reached.

That is, the migration portion of the cake 2 is formed on the outside of the cake, and its layer is almost constant. The weight of this migration portion is obtained in advance by experiments or the like to specify the cake replacement time (first residual thread limit weight W _L ) and the winder stop time (second residual thread limit weight W _LL ).

It should be noted that the both residual thread limit weights W _L and W _LL can be arbitrarily set by operating the key switch 22a of the weight sensor controller setting device 22.

In the cake state warning processing means 24, the thread breakage lamp 20a or the residual thread warning lamp 20b is turned on and the buzzer 20c is operated based on the output signals of the thread breakage determination processing means 26 and the residual thread warning processing means 27, or , Stop the winding machine 5 (details will be described later).

(Winding monitoring processing procedure) Next, the winding monitoring processing procedure will be described with reference to the flowcharts of FIGS. 5 and 6.

(1) Cake state monitoring processing procedure This program is executed for each cake in each cake state monitoring processing procedure 23.

As shown in FIG. 5, first, in step s101, the weight W _{t of the} cake 2 is read from the output signal of the weight sensor 3. Then
In step s102, the previous difference between cake weight W _t read in cakes weight W _t-3 and the step s101 is loaded in the routine of _{(t-3) (W t} -3 -W t) the set value K Compare with _O.
In addition, in step s103, the cake weight W _t read in step s101 is compared with the first residual thread limit weight W _L.

When it is determined that W _t−3 −W _t <K _{O in} step s102 above, the decrease amount of the cake weight at the set time is the set value (for example,
Since it is 1 to 5 g / 3 sec) or less, it is determined that the yarn is broken, and the process proceeds to step s104, and the yarn break signal is output. Further, to determine whether yarn breakage signal when it is determined that _{W t-3 -W t ≧ K} O at the step s102 the process proceeds to step s105 is output, if the yarn breakage signal is output, the step s106 If the yarn breakage signal is OFF, the process returns to step s101.

On the other hand, when it is determined in step s103 that W _t <W _L , the cake weight W _t is the first residual thread limit weight W _L (for example, 200 to 250).
Since g) or less, it is determined that the residual yarn is approaching the migration portion, and the first residual yarn alarm signal is output in step s107. Then, in step s110, the above step s101
Compare the cake weight W _t read in step 2 with the second residual thread limit weight W _LL (for example, 100 to 150 g), and if W _t <W _LL , cake 2
It is determined that the residual yarn of No. 1 is on the migration portion, and the process proceeds to step s112 to output the second residual yarn alarm signal. If it is determined that W _t ≧ W _LL in step s110, the process proceeds to step s111. On the other hand, if it is determined in step s103 that W _t ≧ W _L and the process proceeds to step s108, it is determined whether the first residual thread alarm signal is output. If the first residual thread alarm signal is output, step The process proceeds to s109, the output of the first remaining yarn warning signal is turned off, and the process proceeds to step s111. If it is determined in step s108 that the first remaining yarn warning signal is not output, the process returns to step s101.

Then, when proceeding to step s111, it is judged whether or not the second remaining yarn warning signal is output. When the second remaining yarn warning signal is outputted, it proceeds to step s113 and the second remaining yarn warning signal is turned off. Then, the process returns to step s101. If the second remaining yarn warning signal is not output, the process directly returns to step s101.

(2) Cake state alarm processing procedure As shown in FIG. 6, first, in step s201, it is determined whether the winding machine 5 is operating, and if it is, step s202
If it is stopped, this step s201 is repeated.

When the process proceeds to step s202, the timer operates, and after 15 seconds, that is, when this timer times out, steps s203, s2
Go to 04.

In step s203, it is determined whether or not the first residual thread alarm signal is output. If the first residual thread alarm signal is not output, the process proceeds to step s201, and the first residual thread alarm signal is output. If step s206, the remaining thread alarm lamp
Turn on 20b and turn on the buzzer 20c in step s207.
Turn on to let the operator know when to replace cake 2 and step
Go to s205.

In step s205, it is determined whether or not the second residual thread alarm signal has been output. If the second residual thread alarm signal has not been output, the procedure returns to step s201, and the second residual thread alarm signal is output. In this case, the process proceeds to step s208, 15 seconds after the timer is operated, that is, after the time is up, the winding machine 5 is stopped to prevent the migration portion from being mixed and the buzzer 20c is turned on to instruct the operator of the winding machine 5 Notify the cause of the stop (steps s209, s210).

The operator gives the first residual thread alarm (remaining thread alarm lamp ON, buzzer ON)
Since the cake weight becomes W _t = O when the cake 2 is replaced after the is issued, and the second residual thread alarm signal is output, the timer is activated in step s208 to stop the winding machine 5. Delayed to ensure continuous operation. When the process proceeds from step s202 to step s204, it is determined whether the thread break signal is output.If the thread break signal is not output, the process returns to step s201, and if the thread break signal is output, The number of thread breaks is counted from the thread break signal from each cake condition monitoring processing means 23, and the thread break lamp is displayed.
20a is turned on and buzzer 20c is turned on to notify the worker of the thread breakage (steps s211, s212, s213).

Then, in step s214, the number of thread breaks counted in step s211 is compared with the limit value K ₁ (depending on the type of roving), and if the number of thread breaks is less than or equal to the limit value K ₁ ,
Return to step s201, and if the number of thread breaks exceeds the limit value K ₁ , stop the winding machine 5 and turn on the buzzer 20c.
Then, the operator is notified of the cause of the stop of the winding machine 5 (steps s215, s216).

In this way, the weight of the cake 2 is measured and the residual yarn amount and the yarn breakage are detected in a non-contact manner, so that the yarn is not damaged. Further, since the cake weight is calculated from the moving average value, the residual yarn amount can be managed properly and accurately.

Furthermore, unmanned monitoring work such as automatic yarn knotting and automatic cake replacement can be realized by using the above-described yarn breakage determination and residual yarn weight determination.

[Advantages of the Invention] As described above, according to the present invention, the remaining yarn amount or the yarn breakage is monitored in a non-contact manner by the cake weight, so that the yarn wound around the cake is not damaged. Not only can standing be prevented and high-quality roving can be obtained, but the remaining yarn amount and yarn breakage can be monitored simultaneously with one system, so the structure can be simplified and the overall size of the device can be reduced. .

Furthermore, since the cake weight is only measured, there is no need to consider the environment without using a light emitting device as in the past, and there are few failures, maintenance-free and a long service life can be achieved.

In addition, since the cake weight is calculated from the moving average value, the weight change of the cake can be accurately calculated without being affected by the disturbance generated when the yarn is pulled out from the cake. The replacement time can be accurately determined, and high-quality roving can be structured with high yield.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention, FIG. 1 is a functional block diagram of a cake weight processing means, FIG. 2 (a) is a characteristic diagram showing a variation amount of cake weight, and FIG. (B) is a schematic view showing the state of pulling out the yarn, FIG. 3 is a diagram showing the weight fluctuation of the cake after the moving average process, FIG. 4 is an overall schematic view of the winding monitoring device, and FIG. 5 is a cake condition monitoring FIG. 6 is a flowchart showing a processing procedure, and FIG. 6 is a flowchart showing a cake state alarm processing procedure. In the figure, 3 is a weight sensor, 23 is a cake condition monitoring processing device,
24 is a cake state alarm processing device, 25 is a moving average processing means,
26 is a thread breakage determination processing means, 27 is a residual thread warning processing means, K _O ,
W _L and W _LL are set values, W _t is (current) cake weight, and W _t-3 is (previous) cake weight.

Claims (1)

[Claims] 1. A weight sensor for detecting a cake weight, a cake state monitoring processing means for detecting a residual thread weight and a thread breakage state based on an output signal of the weight sensor, and a residue detected by the cake state monitoring processing means. And a cake state alarm processing unit that outputs a residual yarn alarm and a yarn break alarm according to the yarn weight and the yarn break condition, and the cake state monitoring processing unit outputs the output signal of the weight sensor to 1/5 to 1 / Taking in every 50 seconds, moving average processing means for calculating the average of 20 to 100 pieces thereof, and the cake weight calculated by the moving average processing means are read at predetermined time intervals, and the cake weight this time and the cake weight last time. If the amount of decrease is less than or equal to the set value, the yarn breakage determination processing unit that outputs a yarn breakage alarm signal and the cake weight calculated by the moving average processing unit are read at predetermined time intervals. And a preset residual thread limit weight, and when the cake weight is less than or equal to the residual thread limit weight, the residual thread alarm processing means for outputting a residual thread alarm signal is used. A unique winding monitoring device.