JPH0699077B2 - Automatic material feeding control method in the spreading machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an automatic dough feeding control method in a spreading machine used for repeatedly extending and stacking a piece of cloth to a specified length.

<Prior art> Since multiple sheets of fabric rolled by a rebeling machine can be stacked, it is required that the edges of the stacked fabrics are aligned and wrinkle-free in order to cut the fabrics at the same time.

This basically means that it is enough to unravel the unwound material at the same speed as the traveling speed of the incinerator and send it out on the table to extend it, but in reality, the roller is used to unwound the unwound material and send it. It is generally used, in which case there is always a slip between the roller and the piece. In addition, this slip varies depending on the weight of the piece of cloth, the material acceleration, and the like, and the slip is not constant. Therefore, in the conventional spreading machine, the feeding speed of the cloth is controlled in harmony with the traveling speed of the cloth spreading machine. Since the speed tends to be faster, using two rollers for the fabric-feeding device and the fabric-defining device, the fabric is first melted by the fabric-melting device, and then the fabric is fed by the fabric-feeding device at an appropriate distance. Such a method is taken. The control is performed so that the cloth is appropriately loosened between the unwinding device and the cloth feeding device, and the weight and inertial force of the cloth applied to the cloth feeding device are kept constant. Also, since the slip changes depending on the type of fabric and dyeing, do not rotate the roller of the anti-material feeder like the running speed of the spreading machine, but rotate the roller in advance in anticipation of the slip amount. ing.

<Means for Solving the Problems> However, in the above-mentioned spreading machine, if the traveling acceleration of the spreading machine is reduced, the roller of the dough feeding device can be rotated in proportion to the traveling speed for a certain kind of piece. However, if the type of fabric changes, the feed adjustment (proportional constant)
Need to be refitted to the piece.

And today, the number of kinds of fabrics is increasing in response to the demand for many kinds of small lots, and on the other hand, the serious labor shortage seen in the entire industry tends to force the reduction of skilled personnel. The automation of feed adjustment in machines has become essential.

Therefore, the present invention intends to provide a method for spreading the cloth that can appropriately feed out the cloth in consideration of all the conditions, with respect to the drawbacks of the conventional example concerned.

<Means for Solving the Problems> A slack of a piece of cloth in the course of a piece of cloth moving in the cloth-spreading machine is a direct-type photoelectric sensor or a reflection-type photoelectric sensor, or the shape of a line drawn with a laser beam on the piece of cloth is displayed on a television. Captured from a diagonal side by the camera, while detecting the tension of the piece of fabric from this, the degree of tension of the piece of fabric is determined according to the rules of the fuzzy control figure that have been determined in advance, the resolving means, the piece-feeding means, and the spreading machine traveling means, The speed is controlled for each of the other items to be controlled.

<Operation> When the detected value is less than a certain amount of slack, the slack of the piece of cloth that moves in the retraction machine is optically detected, and according to the rule of the fuzzy control figure that predetermines the degree of the slack of the piece of cloth, the piece becomes a piece of cloth. Since it means that the tension is working,
In this case, by increasing the unraveling speed and the feeding speed of the anti-object feeding means, a certain slack is given to the anti-object to eliminate the tension acting on the anti-object, and the detected value of the slack of the anti-object becomes larger than the constant slack. In such a case, the unfolded cloth can be wrinkled, so that the unrolled state of the cloth is kept in the optimum state by slowing down the feeding speed of the unraveling and cloth feeding means.

<Examples> The present invention will be described in detail below with reference to the drawings.
First, the structure will be described with reference to FIG. 3 to FIG. 3. A drive for supporting a roll-wound original fabric A horizontally and rotatably on the retraction machine main body 1 and sequentially feeding it out from the outer end of the original fabric A. The unwinding means 2 having the motor 4, the unwinding material feeding means 5 having the unwinding material feeding roller 6 which is driven by the motor 7 from one side of the spreading machine main body 1, that is, the front side, and the motor 13
Drive means for rotating the traveling wheels 14, 15 so as to move the spreading machine main body 1 on the guide rails 17 provided along both side edges of the spreading table, and The defusing means 2 is a direct type for constantly giving a certain amount of slack to the piece of cloth a between the feeding roller 3 that is rotated by the drive of the motor 4 and the guide plate 8 and monitoring the degree of slack of the piece of cloth a. Photoelectric sensors bc and b'-c '(b and b'are light-emitting elements and c and c'are light-receiving elements) are provided above and below (see FIG. 2), and the front end of the retraction machine is further provided. A guide plate 9 having a gentle guide surface is provided immediately below the piece-feeding roller 6 in the section so that its lower front end faces the portion of the cutter 11, and a plurality of photoelectric sensors are blocked by blocking the R surface of the guide plate 9.
b ₁ −c ₁ , b ₂ −c ₂ , b ₃ −c ₃ , b ₄ −c ₄ ... are arranged side by side so that the optical axis is stepwise, and the counterfeit a ₁ , a ₂ , a ₃ ... The tangent position of the slack of (b ₁ , b ₂ ... b ₆ is a light emitting element and c ₁ , c ₂ ... c ₆ is a light receiving element) is detected.

Then, the front end portion of the upper surface of the guide plate 9 suppresses the sending end of the piece of cloth with a material presser 12 with an appropriate pressure to cut the piece of cloth with the cutter 11.
I'm trying to disconnect with.

The above is designed to be controlled by the following control circuit, that is, the photoelectric sensor (Fig. 2) for constantly giving a certain slack (margin) to the cloth and constantly monitoring the situation and the degree of slack of the cloth. Are divided into several stages, and the anti-object feed detecting means 30 consisting of a slack degree detecting section 10 (FIG. 3) consisting of a photoelectric sensor group for always tracking and detecting changes, and a signal from the detecting means 30 A fuzzy control unit 25 that receives and outputs an operation signal, a drive unit 18 that operates the motor 13 for traveling the retraction machine by the output from the fuzzy control unit 25, a drive unit 22 of the motor 7 for the anti-object delivery roller, and an unwinding roller. The motor control unit 19 that outputs a drive command signal to the drive unit 24 of the motor 4 for driving, and the drive units 18, 22, and 24 are output by the fuzzy control unit 25, respectively.
3, the speed command voltage generator 23 that outputs a signal to the motor 7 for the material feeding roller, the motor 4 for the unwinding roller to instruct how much to rotate, and the cutter 11 and the guide by the signal from the fuzzy controller 25. A drive unit 28 that operates the elevator motor 26 that supports the plate 9 and a motor 27 for the edge aligning mechanism of the piece of cloth, and continuously detects the traveling speed of the cloth spreading machine, and sends a signal to the fuzzy controller 25 through the counter circuit 21. It is controlled by the encoder 20 for driving and sending.

Next, the control method for the traveling speed and the unraveling material feeding control of the above-mentioned spreading machine will be explained according to the looseness detection section 10 of FIG. 3 through the fuzzy control graphic rule of FIG. By driving (not shown), the traveling motor 13, the anti-object feed roller motor 7, the unraveling roller motor 4, the elevator motor, and the ear aligning motor drive unit 28 operate under the initial conditions. To start.

Therefore, first, the slack is emitted to the lower limit as shown in FIG. 2 in advance so that the pull-out roller 3 always causes the cloth a to have a certain slack and the cloth feed roller 6 fast-feeds the cloth so that the tension does not directly act on the cloth. The photoelectric sensor including the element b and the light receiving element c monitors the upper limit of the slack, and the photoelectric sensor including the light emitting element b ′ and the light receiving element c ′ constantly monitors the upper limit of the slack to accelerate the motor 4 for the unraveling roller. Is slowed down so that a large force at the time of unwinding the original fabric does not directly affect the feed of the anti-object feed roller 6.

Then, when the piece of material a is sent out by the feed roller 6, whether or not the piece of material a is too tight is determined by b ₁ in the piece of material detecting means 30.
It is detected by the photoelectric sensor of any one of −c ₁ , b ₂ −c ₂ , ... B ₆ −c ₆ , and is input to the fuzzy control unit 25 via the sensor input processing unit 29.

Then, if the hanging part of the piece of article a ₁ is detected by the photoelectric sensor of b ₁ -c ₁ , it is shown that the piece of article is stretched most loosely, and at this time, the fuzzy control of FIG. Adopting the feed speed of the piece of cloth and the traveling speed of the cloth spreading machine so as to correspond to the figure, sends a command signal to that effect to the speed command voltage generation section 23 and the motor control section 19, and the speed command voltage generation section 23 In accordance with the speed command from, the motor 13 for traveling the cloth spreading machine, the motor 7 for the anti-object feeding roller, and the respective drive units 18, 22, 24 for driving the motor 4 for the unraveling roller are operated to change the anti-object feeding speed. By controlling each motor 13,7,4 so as to reduce the standard speed by 1.67 (%) and at the same time increase the traveling speed of the cloth spreading machine by 3.38 (%) of the standard speed, it is possible to prevent excessive looseness of the cloth. To do.

Similarly, if the state of the piece of cloth is slightly loose (state of a in Fig. 3 a ₂ ), a figure obtained by superimposing shaded parts for each speed so as to correspond to the fuzzy figure in Fig. 5 (b) D. A value obtained by comparing the center of gravity of S ₃ and S _{4 with} the standard speed, that is, 0.28 (%) deceleration of the standard speed at the feed speed, and 2.63 (%) of the standard speed at the traveling speed. It is possible to feed properly.

Others In a good condition as shown in Fig. ₃ a3, Fig. 5 (c) C
A fuzzy control graphic application, the feed speed, feed rate from the comparison between the gravity center position and the standard speed of the graphic S _5, S ₆ obtained by superimposing for each speed and running speed, 1.57 standard speed
(%) Acceleration, and good running results can be obtained by increasing the standard speed to 1.78 (%).

Also when the same manner as described above FIG. 5 (d) is good tension piece goods as C is now fabric state of FIG. 3 a _4, travel of the feed rate and Nobehan machine cloth for this The speed is a value obtained by comparing the barycentric positions of the figures S ₇ and S ₈ obtained by superimposing the shaded areas of each fuzzy control figure for each speed with the standard speed, that is, at the feed speed, 1.78 (the standard speed). %)
The optimum condition is obtained by increasing the speed and increasing the running speed by 0.84 (%) of the standard speed.

5 (a), 5 (b), 5 (c), and 5 (d) show the case in which the slack of the cloth is applied and the case in which it is good. Next, the case where the cloth is slightly tense is as described above. fuzzy control graphic fifth diagram (e) B is applied when the piece goods as shown in FIG. 3 a ₅ just like is stretched somewhat s. That is, in this case each feed rate and Nobehan machine each shape S of the traveling speed of _9, S ₁₀
The value obtained by comparing the position of the center of gravity with the standard speed, that is, 2.63 (%) increase of the standard speed at the feed speed and 0.28 (%) of the standard speed at the running speed, the optimum state can be obtained.

Further, FIG. 5 in the case of tension too far as shown in FIG. 3 a ₆ (f)
The fuzzy control figure of A is applied, and in this case as well, the values obtained by comparing the respective barycentric positions of the figures S ₁₁ and S ₁₂ obtained by superimposing the shaded portions for each speed with the standard speed Good feed can be obtained by increasing the speed by 3.34 (%) and decelerating the standard speed by 1.67 (%).

In addition, it is possible to perform fine fuzzy control in the same way, and for manual control, it is possible to control by setting a fuzzy control figure and storing it in a computer. I shall.

As described above, depending on which of the photoelectric sensors b ₁ -c ₁ , b ₂ -c ₂ , ... b ₆ -c ₆ detects the looseness of the piece of cloth, the fuzzy control figure corresponding to this can be obtained. The respective motors 13, 7, 4 are controlled according to the values determined and calculated based on the values.

Next, the means for detecting the excessive tension of the cloth is not limited to the direct type photoelectric sensor as described above, and the laser gun 31 is provided on the curved surface of the hanging end of the cloth a on the guide plate 9 as shown in FIG.
It is also possible to draw a line 33 having a certain length, photograph this with the video camera 32, and perform image processing to calculate the degree of slack of the piece of cloth.

Further, as shown in FIG. 7, the front surface of the drooping curved portion of the piece of cloth a on the guide plate 9 is illuminated by the light source 34, and the curved shape of the piece of cloth is directly photographed from the end face. There are methods such as calculating the degree.

<Effects of the Invention> Since the present invention is configured as described above, there is no slack caused by variations in slack caused by slippage depending on the material quality, superposition of pieces of cloth, or large or small acceleration during spreading. It is possible to completely eliminate the evenness so that the fabric can be stretched while maintaining a constant tension, and it is possible to eliminate the occurrence of undesired wrinkles when the fabric is stretched.

[Brief description of drawings]

1 to 7 show an embodiment of the method of the present invention. FIG. 1 is a schematic side view of a retraction machine used in the method of the present invention, FIG. 2 is a functional schematic diagram of slack monitoring means, FIG. 3 is a functional schematic diagram of main part detecting means, and FIG. FIG. 5 is a block diagram, FIG. 5 is a relationship diagram between a fuzzy control figure and an output of a drive unit, and FIG. 5 (a) shows a state in which a piece of fabric is excessively loosened. FIG. 5 (b) shows a state in which the piece of fabric is loosened. 5 (c) and 5 (b) each show a good state. FIG. 5 (e) shows a state in which the piece of cloth is tense. FIG. 5 (f) shows a state in which the piece of fabric is too tight. FIG. 6 is a perspective view showing a second embodiment of the slack detecting means, and FIG. 7 is a perspective view showing the second embodiment of the same. 1 ... Spreading machine main body, A ... Original fabric, 4 ... Unwinding roller motor, 6 ... Feed roller, 7 ... Sending roller motor, 9 ... Guide plate, 13 ... Spreading machine running use motor, a ...... piece _{goods, b 1, b 2 ... b} 6 ...... emitting _{element, c 1, c 2 ... c} 6 ...... receiving element

Claims (3)

[Claims] 1. An unwinding means for sequentially unwinding roll-wound piece of cloth, a piece of cloth feed means for feeding the piece of cloth sent out by the unpacking device at a spreading speed, and a spreading machine along a spreading table. In a spreading machine composed of a traveling means adapted to run, the relaxation state of the flow of the piece of material is determined by a plurality of photoelectric sensors installed on the hanging side of the piece of material in the middle of the piece material traveling path in the piece of spreading machine. It is characterized in that the degree of the degree is detected and fuzzy control is performed on the detected value to control the speed of each of the unwinding means, the piece feeding means, and the spreading machine traveling means in accordance with the detected value. Automatic material feeding control method in the spreading machine. 2. In the midway of the anti-object traveling route in the retraction machine,
Draw a line of a certain length with a laser beam on either surface of the piece of cloth, and use a TV camera to draw this line.
2. The automatic fabric feed control method for a fabric spreading machine according to claim 1, wherein the shape appearing according to the slack is copied and image-processed to detect the degree of slack of the piece. 3. In the midway of the anti-object traveling path in the retraction machine,
2. The degree of looseness of the piece of cloth is detected by shining a light ray on either the front or back surface of the piece of cloth and photographing the end surface of the piece of cloth with a television camera to perform image processing. Automatic material feeding control method in the spreading machine.