JPH0428667A - Automatic woven material feeding control method for spreading machine - Google Patents

Abstract

PURPOSE:To enable delivery of woven material properly by catching looseness in a woven material by a photoelectric sensor or a TV camera, and controlling the speed of spread releasing means, woven material feeding means, spreading machine running means and the like according to a rule of fuzzy control figure in which a spreading condition is fixed preliminarily. CONSTITUTION:The drive part of each motor starts at first operation in a condition to meet with initial conditions. Next, in the case a woven material is fed quickly by a woven material (a) feeding roller 6 while a specified looseness is normally given to the material (a) by a delivery roller 3, the lowermost and uppermost limits of looseness are preliminarily monitored by a photoelectric sensor comprising light emitting and receiving elements (b, b', c, c') without giving a direction tension to the material (a) to accelerate or decelerate the speed of a motor 4 for a spread releasing roller so as to prevent the operation of the roller 6 from being influenced. The output is input to a fuzzy control part via a sensor input processing part to control a spreading machine running motor 13, a woven material delivery roller motor 7 and the spread releasing roller motor 4, respectively to thereby prevent the overlooseness of woven material.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an automatic fabric feed control method in a fabric spreading machine used to repeatedly extend and laminate fabrics to a specified length.

<Conventional technology> Since multiple sheets of fabric are stacked by a spreading machine, in order to cut the fabric at the same time, the edges of the stacked fabrics must be aligned and wrinkle-free.

Basically, this means that it is sufficient to unravel the fabric at the same speed as the running speed of the spreading machine, feed it onto the table, and spread it, but in reality, rollers are used to unravel and feed the fabric. In this case, there is always some slippage between the roller and the cloth. Moreover, this slippage varies depending on the weight and material of the cloth, the acceleration during stretching, etc., and is not constant. Therefore, in conventional cloth spreading machines, the feed speed of the cloth is controlled in harmony with the running speed of the cloth spreading machine. However, in reality, as the fabric is stretched, its weight becomes lighter, slippage decreases, and the feeding speed of the fabric tends to increase, so two rollers are used for the fabric feeding device and unraveling device. Therefore, a method is used in which the fabric is first unraveled by an unraveling device, and then the fabric is sent out at an appropriate distance by a fabric feeding device. The control is performed so that the fabric is appropriately loosened between the unraveling device and the fabric feeder, and the weight and inertia of the fabric applied to the fabric feeder are kept constant. Also, since slippage varies depending on the type of fabric and dyeing, instead of rotating the rollers of the fabric feeder at the same speed as the spreading machine, the rollers should be rotated extra in advance to account for slippage. ing.

However, in the above-mentioned spreading machine, if the running acceleration of the spreading machine is reduced, the rollers of the fabric feeding device can be rotated in proportion to the running speed for certain kinds of fabrics. If the type of cloth changes, the feed will need to be adjusted (constant of proportionality).
It is necessary to match the cloth to the cloth again.

In order to meet today's demand for a wide variety of small lots, the number of types of fabrics has increased, and on the other hand, the serious labor shortage seen throughout the industry has led to a decline in the number of skilled human resources due to lack of money. Automation of feeding feed adjustment in feeding machines is becoming essential.

SUMMARY OF THE INVENTION Therefore, the present invention aims to solve the drawbacks of the above-mentioned conventional examples and to provide a method for spreading cloth that can appropriately unwind the cloth in consideration of all conditions.

Measures to solve the problem〉 During the path of the cloth as it moves through the spreading machine, the slackness of the cloth can be detected using a direct photoelectric sensor or a reflective photoelectric sensor, or the shape of a line drawn on the cloth using a laser tip. is captured diagonally from the side by a television camera, and the tension of the fabric is detected from this, and the tension of the fabric is determined in accordance with the rules of a fuzzy control figure that is predetermined. Means, the speed of each item to be controlled is controlled.

Function> The slackness of the fabric moving in the spreading machine is detected optically, and according to the rules of fuzzy control figures that predetermine the degree of slackness of the fabric, when the detected value is less than a certain level of slackness, the fabric is adjusted accordingly. This means that tension is acting, so
In this case, by increasing the unraveling speed and the feeding speed of the cloth feeding means, a certain amount of slack is given to the cloth and the tension acting on the cloth is eliminated, and the detected value of the slack of the cloth is greater than the constant slack. If the fabric is rolled, wrinkles will be formed in the rolled fabric, so the feeding speed of the unraveling and fabric feeding means is slowed down to maintain the fabric in the best rolled condition.

<Example> The present invention will be explained in detail below.
First of all, to explain its development with reference to Figs. An unraveling means 2 having a motor 4, a cloth feeding means 5 having a cloth feeding roller 6 driven by a motor 7 from one side of the spreading machine main body 1, that is, closer to the front side, and a motor 1.
3, the running wheels 14, 15 are rotated to move the main body 1 of the spreading machine on guide rails 17 provided along both side edges of the spreading table.
In addition, the unraveling means 2 is provided with a cloth a between a feeding roller 3 rotated by the drive of a motor 4 and a guide plate 8.
Direct-ray type photoelectric sensors b-c and b'-c for always giving a certain amount of slack to the cloth a and monitoring the degree of slack in the cloth a.
' (b, b' are light emitting elements, c, c are light receiving elements) are provided above and below (see Fig. 2, 9), and are also gently placed directly below the fabric feed roller 6 at the front end of the spreading machine. The lower front end of the guide plate 9 having a guide surface is cut with a cutter 11.
A plurality of photoelectric sensors b+ '++bz 'z+bz
-c3. b4e+,"' are arranged side by side so that the optical axes are stepped, and the cloth al+a2=a,...(b+, bx・
...b6 is a light emitting element, and CI+ ('2...C6 is a light receiving element) is designed to detect the tangential position of slack.

Then, at the front end of the upper surface of the guide plate 9, the feeding end of the fabric is suppressed by a cloth presser 12 with appropriate pressure, and the fabric is cut by a cutter 11.

The above is controlled by the following control circuit, that is, the photoelectric sensor (Fig. 2) that always gives a certain amount of slack (margin) to the cloth and constantly monitors the situation, and the degree of slack of the cloth. a cloth feed detection means 30 consisting of a slackness detection section 10 (FIG. 3) consisting of a group of photoelectric sensors that constantly track and detect changes in the number of steps;
A fuzzy control section 25 that receives a signal from the detection means 30 and outputs an operation signal, a drive section 18 that operates the spreading machine running motor 13 based on the output from the fuzzy control section 25, and a cloth delivery roller motor 7. drive unit 22 of
, a motor control section 19 that outputs a drive command signal to the drive section 24 of the unraveling roller motor 4, and an output from the fuzzy control section 25 to control each of the drive sections 18.22.
．． 24 is a speed command voltage generating section 23 that outputs a signal instructing how much rotation should be made to the traveling motor 13, the dough feeding roller motor 7, and the unraveling roller motor 4, respectively, and the fuzzy control section 25. A driving section 28 operates the elevator motor 26 that supports the cutter 11 and the guide plate 9, and the motor 27 for the fabric edge leveling machine ellipse, respectively, and the running speed of the fabric spreading machine is constantly detected and transmitted via the counter circuit 21. The fuzzy control section 25
The vehicle is controlled by a running encoder 20 that sends signals to the vehicle.

Next, the control method for controlling the running speed and unraveled fabric feed of the above-mentioned spreading machine will be explained according to the graphical rules of the slackness detection section 10 in Fig. 3 to the fuzzy control shown in Fig. 5. First, the start button of the spreading machine will be (not shown), the traveling motor 13 and the cloth feed roller motor 7 are moved.
, the unraveling roller motor 4, the elevator motor, and the selvage motor drive unit 28 start operating in a state that each meets the initial conditions.

Therefore, first of all, the lower limit of the slack is set in advance so that even if the cloth a is always given a certain amount of slack by the pull-out roller 3 and the cloth is rapidly fed by the cloth feed roller 6, no tension will be applied directly to the cloth as shown in FIG. The upper limit of slack is constantly monitored by a photoelectric sensor consisting of a light-emitting element b' and a light-receiving element C', and the speed of the unraveling roller motor 4 is increased. is decelerated so that the large force when unraveling the raw fabric does not directly affect the feed of the fabric feed roller 6.

When the cloth a is sent out by the feed roller 6, whether or not the cloth a is too tensioned is detected by one of the photoelectric sensors b+ e++ bz e2+'''ba as in the cloth feed detection means 30, and the sensor manual processing is performed. Part 2
9 and input to the fuzzy control unit 25.

Then, by the photoelectric sensor of Wakashisu, -e, the cloth a1
When the drooping part of A command signal to that effect is sent to the speed command voltage generation section 23 and the motor control section 19, and the spreading machine running motor 13 is operated according to the speed command from the speed command voltage generation section 23. Operate each drive unit 18.2224 for driving the cloth feed roller motor 7 and the unraveling roller motor 4, respectively, and adjust the cloth feed speed to 1 of the standard speed.
．． Each motor 1 is decelerated by 67 (%) and at the same time increases the running speed of the spreading machine by 3.33 (%) of the standard speed.
By controlling 3 and 7.4, it is possible to prevent the fabric from becoming too loose.

Furthermore, in the same way, the condition of the cloth was slightly loosened (Fig. 3, 82).
In the state of 5th section (b), the center of gravity position of S4 is obtained by superimposing the hatched part for each speed, and is obtained by comparing the center of gravity position of S4 with the standard speed. In other words, by reducing the feed speed by 0.28 (%) of the standard speed and increasing the running speed by 2.63 (%) from the standard speed, it is possible to properly feed the cloth.

In other good conditions as shown in Figure 3 a3, Figure 5 (c)
The fuzzy control figure of S5. From the comparison between each center of gravity position of S6 and the standard speed, the feed speed is 1 of the standard speed.
．． 57(%) increase in speed, driving speed is 1.78(%) of standard speed
%) Better results can be obtained by increasing the speed.

Similarly to the above, when the tension of the fabric is good as shown in Figure 5 (cl) C, the condition of the fabric will be as shown in Figure 3 a4,
The feeding speed of the cloth material and the traveling speed of the spreading machine were determined by comparing the center of gravity of the shapes Sf and Ss, which were obtained by superimposing the diagonal lines of each fuzzy control diagram with the respective speeds, with the standard speed. The value, i.e. feed rate, is 1 of the standard speed.
．． The speed has increased by 78 (%), and the running speed is 0 of the standard speed.
．． The optimum condition can be obtained by increasing the speed by 84 (%).

Above, Figure 5 (a), (b), (c), (d
) shows the case where the cloth is slack and the case where it is good.Next, we will discuss the case where the cloth is slightly taut.In exactly the same way as above, when the cloth is at best at the top as in No. 3I21a5, The fuzzy control port shape shown in FIG. 5(e)B is applied. That is, in this case, the figures Sg, S, respectively represent the feed speed and the traveling speed of the spreading machine. The value obtained by comparing the center of gravity position with the standard speed, that is, the feed rate is 2.63 (%) of the standard speed.
) A suitable state for fi can be obtained by increasing the speed and decelerating the running speed by 0.28 (%) of the standard speed.

In addition, if the tension is too high as shown in Fig. 386, Fig. 5<f
'lA fuzzy control figure is applied, and in this case too, the values obtained by comparing the positions of the centers of gravity of figures S and S I 2 obtained by superimposing the hatched parts for each speed with the standard speed, that is, the feed rate. Good feed can be obtained by increasing the speed by 3.34 (%) from the standard speed and decreasing the traveling speed by 1.67 (%) from the standard speed.

Furthermore, it is possible to perform precise fuzzy control in the same way, and it should be noted that manual control can also be controlled by setting fuzzy control figures and storing them in the computer. shall be taken as a thing.

As above, b+-c++bz 02%”b6
Depending on which photoelectric sensor of the CG detects the slackness of the fabric, a corresponding fuzzy control figure is determined, and each motor 13.7.4 is controlled according to the value calculated based on it. .

Next, the means for detecting the slackness and overhang of the cloth material is not limited to the direct photoelectric sensor as described above.
It is also possible to draw a line 33 of a certain length using 1, photograph this with a video camera 32, process the image, and calculate the degree of slackness of the fabric.

In addition, as shown in FIG. 7, the front surface of the drooping curved part of the cloth a on the guide plate 9 is irradiated with the light source 34, and the curved shape of the cloth is directly copied from the end surface, and by imaging this, the slackness of the cloth can be checked. There are methods such as calculating the degree.

<Effects of the Invention> Since the present invention has been refined as described above, it is possible to eliminate variations in slack caused by slippage that differs depending on the fabric quality, the weight I of the fabric, the magnitude of acceleration during spreading, etc. It is possible to completely eliminate unevenness in the fabric, so that the fabric can be rolled with a constant tension at all times, and this also eliminates the occurrence of undesired wrinkles when the fabric is rolled.

[Brief explanation of the drawing]

1 to 7 show embodiments of the method of the invention. Fig. 1 is a schematic side view of the spreading machine used in the method of the present invention, Fig. 2 is a schematic diagram of the function of the slack monitoring means, Fig. 3 is a functional schematic diagram of the main part detection and inspection means, and Fig. 4 is a schematic diagram of the function of the slack monitoring means. , Functional Block Diagram 1 Section 5 is a diagram of the relationship between the fuzzy control figure and the output of the drive unit, and FIG. FIG. 5(b) shows a state in which the cloth is slightly loosened. FIGS. 5(c) and 5(d) both show good conditions. FIG. 5<e) shows a state in which the cloth is slightly stretched. FIG. 5(f) shows a state in which the cloth is stretched. FIG. 6 is a perspective view showing a second embodiment of the slack detection means, and FIG. 7 is a perspective view showing the second embodiment of the same. DESCRIPTION OF SYMBOLS 1... Spreading machine main body, A... Original fabric, 4... Unraveling roller motor 6... Feed roller 7... Feeding roller motor 9... Guide plate,

Claims (1)

[Scope of Claims] 1. An unwinding means for sequentially unwinding the roll-wound cloth, a cloth feeding means for sending out the cloth sent out by the unwinding device in accordance with the rolling speed, and a spreading machine with a unrolling table. In a spreading machine, the relaxation state of the flow of the fabric is detected in the middle of the fabric traveling path in the spreading machine by a plurality of photoelectric sensors installed on the hanging side of the fabric. The degree of relaxation is detected, and the detected value is subjected to fuzzy control to control the speed of the unraveling means, the cloth feeding means, and the spreading machine running means, respectively, according to the detected value. Features: Automatic fabric feed control method in a spreading machine. 2. A line of a certain length is drawn with a laser beam on either the front or back side of the cloth in the middle of the cloth traveling path in the spreading machine, and the shape that appears depending on the slackness of this line is copied using a television camera. Claim 1, characterized in that the degree of relaxation of the cloth is detected by image processing.
Automatic fabric feed control method in the described spreading machine. 3. During the cloth traveling path in the spreading machine, a light beam is applied to either the front or back surface of the cloth, and the end face of the cloth is photographed with a television camera and image processing is performed to detect the degree of slackness of the cloth. 2. The automatic fabric feed control method in a spreading machine according to claim 1, wherein the method is characterized in that: