JPH0772363B2 - Fabric pattern matching method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention detects a pattern angle and a position of a plurality of roughly cut fabrics, and adjusts the patterns of the respective fabrics to the same position. Regarding pattern matching method.

[Conventional technology]

Generally, it is necessary to pattern-match a plurality of cloths having a pattern in the sewing process before sewing. For example, as shown in FIG. 19 (a), a pocket 101 of a patterned waist is attached to the upper front body 102.
When sewn on, the striped patterns 102a and 102b of the upper front body 102 and the striped patterns 101a and 101b of the pocket 101 are enlarged as shown in FIG. Need to match each.

Therefore, as shown in FIG. 20, when the fabric 105 that has been wrinkled and stretched by the spreading machine 103 and is stacked on the table 104 is used for patterning, a striped pattern is almost formed on the patterned fabric 106. Cut into the same position. However, since the positions of the striped patterns of the stretched fabric 105 are not always exactly the same, pattern matching is performed to correct the shift of the striped pattern of the stamped fabric 106. Will be needed.

In order to perform the above-mentioned pattern matching, conventionally, a pin stab 108 having two pins 107, 107 shown in FIG. 21 (a) was placed on the table 104 shown in FIG. 20 and modeled. Fabric 106
As shown in FIG. 21 (b), for example, as shown in FIG. 21 (c), the stripes 109 are on the line connecting the two pins 107, 107 while visually observing and aligning them one by one. As described above, they were stacked on the pin piercing table 108.

Then, as shown in FIG. 22, the fabric 106 having completed the pattern matching is trimmed into a predetermined shape such as a pocket by the trimming device 110 by the trimming blade 111.

Therefore, not only a lot of time and labor are required for pattern matching of the cloth, but there is also a fear that an operator is often injured by the pin.

In order to solve the above problems, the present applicant first
The inventors have invented and applied for a pattern matching method and apparatus for automating these operations (see Japanese Patent Laid-Open No. 64-77675).

This is because at least a part of the pattern of the roughly cut cloth is detected by a camera, the detected image signal is quantized and stored in a memory, and the stored image data is output to an image recognition device and the From the predetermined end to the opposite end, along the lines of several different predetermined angles, sequentially read and added, the maximum or minimum value of the plurality of projection data for each added angle The value or the variance with respect to the average value of a plurality of projection data is obtained, and the angle and position of the pattern are detected from the maximum value thus obtained to correct the position of the cloth.

[Problems to be Solved by the Invention]

However, in such a conventional cloth pattern matching method, the background color of the cloth when detecting the cloth pattern is always the same bright color. For this reason, in the case of relatively thin fabrics such as Washishitsu fabric, the pattern is often difficult to see due to the influence of the background color, and there is a problem in that the types of patterns that can be patterned are limited and they are not practical. It was

In general, with respect to a pattern which is usually called a woven pattern, when the background color of the cloth at the time of pattern detection is dark such as black, the appearance of the pattern is good, but when it is bright such as white, it is difficult to see. On the other hand, for a pattern that is a normal pattern and has a light color, a dark background color makes it difficult to see, and a light color makes it easy to see.

FIG. 23 shows a state in which the cloth 106a having a general pattern and the cloth 106b having a woven pattern are placed on the cloth placing plate 112 that is color-coded into the black portion 112a and the white portion 112b. It can be recognized that the white background and the black background color of the fabric 106b are suitable for pattern detection for the above reasons.

The present invention has been made in view of the above points, and a pattern of a fabric capable of selecting an optimal background color corresponding to various patterns, detecting a pattern on the selected background color, and performing pattern matching. The purpose is to provide a matching method.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention conveys one preceding fabric from the laminated fabrics to a position over each background color of a pattern detection unit in which background colors having different brightness are color-coded, and each background is conveyed. The pattern is detected on each color, the maximum and minimum values of the detection data of each field of view are obtained, the range widths of both are compared, and the background color having a large range width is selected and the cloth detected on the background color. After storing the pattern information in the memory and fixing and transferring it to the pattern matching laminating section located directly below the pattern detecting section, the rear fabric is similarly conveyed to the pattern detecting section and the selected background is selected. The pattern is detected on the color to obtain the tilt angle and displacement amount of the preceding fabric with respect to the pattern, and the pattern matching laminated portion is displaced to correct them, and then the posterior fabric is placed directly under it. By fixing and moving it to the pattern-matching laminated part located at The one in which is laminated to the pattern match on the previous position of the fabric.

Further, it is preferable that the background colors having different brightnesses are white and black, respectively.

[Work]

In this way, the patterns of the preceding fabrics conveyed on the background colors of different brightness are detected for each background color. Here, the range width of the minimum value and the maximum value of the detection data is compared. The size of the range width is related to the recognizability of the pattern, and the background color side having the large range width facilitates pattern detection.

Therefore, by performing pattern detection on both the leading and trailing fabrics on this background color, it is possible to perform accurate pattern matching regardless of the type of pattern.

Further, if the background color is white or black, it is possible to maximize the compatibility with many types of patterns.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 8 of the accompanying drawings.

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a front view showing a part thereof by cutting out, FIG. 3 is a right side view thereof, and FIG. It is a left side view shown.

In FIG. 1 and FIG. 2, a dough set table 2 is fixedly provided on the upper right side of a casing 1 which constitutes the outer shell of the device, and a positioning frame 2a for the dough 40 is provided on the surface thereof.

In FIG. 1 of the housing 1, a guide rail 3 is fixedly installed on the upper side, and one end of the material gripping and conveying section 4 and the material pressing section 5 are mounted on the guide rail 3 so as to be slidable in the directions V and U, respectively. The other ends of the housings 1 and 2 can be reciprocally driven by rodless cylinders 6 and 7 provided on the lower side of the housing 1 in FIG.

Then, as shown in FIG. 3, the cloth gripping and conveying section 4 is provided with a guide shaft 4a and a roller winding method in which a suitable interval is provided in the longitudinal direction of the guide shaft 4a so as to be swingable by a rotary cylinder (not shown). It is composed of a plurality of pick-ups 4b such as adhesive type or suction type, and the pick-up 4b is rotated upward, so that one end of the uppermost piece 40a of the patterned material 40 laminated on the material set table 2 is rubbed. ， Allow it to be lifted by adhesion or adsorption.

On the other hand, as shown in FIG.
5a and a plurality of cylinders 5b fixedly installed on the guide shaft 5a at intervals, and a presser 5c that can be driven up and down by these cylinders 5b, and the tip of the presser 5c is made of elastic material such as rubber. The member 5d is fixed as necessary.

Directly below the material set table 2 and in parallel therewith, as shown in FIG. 1, a black first background color portion 8b and a white second color portion 8b.
The pattern detection table 8 color-coded into the background color part 8c of
A guide rail 9 and a rodless cylinder 10 shown in the figure are provided so as to be reciprocally movable within a predetermined range in the direction of the arrow W (see FIG. 2), and a cutout groove is provided at the left end of the handle detection table 8 corresponding to each presser 5c. Provide 8a (see Figure 1). Further, below the pattern detecting table 8 located at the pattern detecting portion at the left end, the pattern matching table 11 can be respectively displaced in the Y, R, Z directions by the motors 12, 13, 14 shown in FIG. And the pattern-matching laminated portion 15 is formed by these.

Further, a U-shaped frame 16 is erected on the housing 1, and the ITV camera 17 is directed downward above the pattern-matching stacking unit 15 so that its field of view can detect the first background color portion 8b. The T-axis motor 18a drives the T-axis motor 18a so that it can move in the arrow T direction between the position and the position where the background color portion 8c can be detected, and the S-axis motor moves in the arrow S direction orthogonal to the moving direction. The camera moving unit 18 is configured such that it can be moved along the pair of guide rails 19 and 19 by being driven by the 18b, and the ITV camera 17 driven by the camera moving unit 18 constitutes the pattern detecting means.

Reference numeral 20 in FIG. 2 is a control unit for controlling the above-mentioned units.

FIG. 5 is a block diagram showing the configuration of the control circuit by the control unit 20. The control unit 20 comprises a central processing unit (CPU) 21, RAM22, ROM23, and a program for controlling the CPU21 is written in the ROM23. There is.

The maximum value and the minimum value of the image pickup data added in the pattern direction of the image data of the cloth striped pattern picked up by the ITV camera 17 positioned on the first and second background color portions 8b and 8c are obtained, and both Compare the range widths, select the one with the larger width, convert the pattern information into a digital signal with the A / D converter 24, and then use the image memory 25.
To be stored in sequence. The stored digital image data is read and integrated, and the image recognition device 26 determines the inclination angle and position of the striped pattern, and the interface (I /
It is input to the CPU 21 via F) 27.

The output of the CPU 21 passes through the turtle moving section driving circuit 30, the pattern matching laminating section driving circuit 31, the cloth gripping and conveying section driving circuit 32, the pattern detection table driving circuit 33, the cloth pressing section driving circuit 34, and the camera moving section 18, respectively. It is transmitted to the pattern matching laminating unit 15, the material gripping and conveying unit 4, the pattern detection table 8 and the material pressing unit 5.

Next, the operation of this embodiment having the above-mentioned structure will be described with reference to the operation explanatory views shown in FIGS. 6 to 16 in accordance with the flow chart shown in FIGS. 17 and 18.

In the initial state, as shown in FIGS. 6 (a) and 6 (b), stripes 41 are aligned with the positioning frame 2a on the material set table 2.
The cloth 40 before pattern matching having the above is stacked and placed, and the pattern detection table 8 is located at the left end. In this state, move the pick-up 4b upwards to the top (first)
The pick-up 4b holds one end of the dough 40a and is lifted.

Here, as shown in FIGS. 7 (a) and 7 (b), the material gripping / conveying unit 4 is driven in the direction of the arrow V _{1 to} move the material 40a to the first, first or second position on the pattern detection table 8 located at the leftmost end. After being conveyed to a position straddling the second background color portions 8b and 8c, the pick-up 4b is swung downward and set on the pattern detection table 8, and then the cloth holding and conveying portion 4
As shown in FIG. 8, the cloth is returned in the direction of the arrow V ₂ , and the pick-up 4b holds one end of the rear cloth 40b and waits there.

In this state, the T-axis motor 18a is driven to move the ITV camera 17 to the position shown by the solid line in FIG. 9 (b), and its field of view is the tip on the first background color portion 8b in FIG. 9 (a). After setting the visual field T1 on the fabric 40a in the upper rank, the detection data of the visual field T1 is obtained and stored in the image memory 25, as shown in the flow chart of FIG. Next, the ITV camera 17 has a field of view in the second background color portion in FIG.
With the visual field T2 on the cloth 40c on 8c, the detection data of the pattern in the visual field T2 is obtained and stored in the image memory 25.

The detection data of the visual fields T1 and T2 thus obtained are the 10th
As shown in FIGS. 7A and 7B, the range widths of the maximum value and the minimum value are h1 and h2, respectively, and are shown by curves a and b.

Here, the range width h1, h2 of each detection data of the visual fields T1 and T2
And selects the background color portion (the second background color portion 8c in the embodiment of FIG. 9) on the side of the field of view (visual field T2 in the embodiment of FIG. 9) from which the image data of the larger range width was obtained. And set it as the pattern detection position. This selection can be done manually, but
It can be automatically performed by the control unit 20.

Next, the ITV camera 17 is moved in the selected background color portion 8c in the direction of the arrow S shown in FIG. 11 so that the field of view thereof is S _{1 to} S _5, and the pattern of the preceding cloth 40a, respectively. Is detected and the pattern information is stored in the image memory 25.

Next, as shown in FIG. 12, the material pressing portion 5 is moved in the direction of the arrow U ₂ and, as shown in FIGS. 13 (a) and 13 (b), the presser foot 5c is lowered by the cylinder 5b to move the material 40a. after fixing onto pattern match table 11 through the notch portion 8a of the handle detection table 8, to move the handle detection table 8 to the arrow W ₂ direction, the fabric
40a is moved to the pattern matching table 11.

After raising the work clamp 5c by the cylinder 5b,
As shown in FIGS. (A) and (b), the material pressing portion 5 is indicated by an arrow U ₁
The pattern matching table 11 is lowered and the pattern detection table 8 is returned to the arrow W ₁ .

When the above operation is completed, the operations shown in FIG. 7 and FIG. 8 are repeated again, and the rear cloth 40b is returned to the left-hand end by the cloth gripping and conveying section 4 and the first and second cloth detection tables 8 are returned. Two
After being transported to a position that straddles the background color portions 8b and 8c and set,
The dough-holding / conveying unit 4 is returned, and the next dough is held and waited.

When the setting of the second cloth 40b is completed, the ITV camera 17 is moved again in the direction of the arrow S as shown in FIG. 11 to detect the pattern, and the inclination and displacement of the pattern with respect to the preceding cloth 40a are detected. After determining the amount, as shown in FIG. 12, while moving the material pressing portion 5 in the arrow U ₂ direction, the motors 12 and 13 displace the pattern matching laminated portion 15 in the arrow Y and R directions. Correct the position of the pattern matching table 11.

When this correction is completed, the pattern matching table 11 is moved by the motor 14.
To the first position and the dough retainer 5 causes the dough 40a, 40
While pressing b together, the pattern detection table 8 is pulled out in the direction of the arrow W _{2 as} shown in FIG. 13, and the cloth 40b is moved to the pattern matching table 11
After stacking on the upper fabric 40a, the pattern matching table 11 is lowered to retract the fabric pressing portion 5 to the initial position, and the fabric 40b
Match the pattern.

Further, for the pattern matching of the rear fabric, the pattern detection table 8 is moved in the direction of the arrow W ₁ to be returned, and the pattern matching table 11
After returning to the raised position, the inclination of the handle and the amount of position shift relative to the preceding fabric 40a are obtained by the same operation as the second fabric, and the position of the pattern matching table 11 is determined. Correct and perform.

Here, it is determined whether or not the pattern matching of all the fabrics has been completed, and if all the patterns are completed, the fabric retainer portion 5 is enlarged again in the direction of the arrow U ₂ to the position above the fabric set table 2 as shown in FIG. While moving, the pattern matching table 11 is lowered as shown in FIG. 16, facilitating the taking out of the laminated fabrics and ending the operation, and manually delivering the fabrics.

With such a configuration, by appropriately selecting the positions of the pick-up 4b of the material gripping and conveying unit 4 and the position of the presser 5c of the material pressing unit 5, for example, a pocket or a collar of a wet shirt which cannot be handled by the conventional method. , Cuffs, front body, and placket such as placket can be laminated by pattern matching regardless of shape, size, etc.

In addition, although the case where the present invention is applied to the striped fabric is described in the above embodiment, the present invention is not limited to this and can be applied to other patterned fabrics having a lattice pattern or the like. .

Further, the background color of the pattern detecting portion does not necessarily have to be white and black, and any number of background colors having different brightness may be used.

Further, the presser foot 5c of the cloth presser section 5 is not limited to a plurality, and may be replaced with a single other means.

〔The invention's effect〕

As described above, the cloth pattern matching method according to the present invention detects the pattern of the preceding cloth on each background color having different brightness and detects the range of the maximum value and the minimum value of the detection data of each visual field. Since the widths are compared and the background color having a large range width is selected and the pattern is detected on the background color, there is no restriction on the type of the pattern, and accurate pattern matching can always be performed.

If the background color is automatically selected, the work efficiency of pattern matching can be remarkably improved, and if white and black are used as background colors having different brightness, it can be applied to many kinds of patterns. The responsiveness can be maximized.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a front view showing a part of the same in a cutaway manner, FIG. 3 is a right side view of the same, and FIG. Fig. 5 is a block diagram showing a cutaway left side view, Fig. 5 is a block diagram showing the configuration of the control circuit, and Figs. 6 (a) and 6 (b) are main part plan views and front views showing the initial state, and Fig. 7 ( FIGS. 9A and 9B are a plan view and a front view of relevant parts showing a leading state of the dough carrying state, and FIGS. ) Is a plan view and a front view of a main part showing a background color selection method, FIGS. 10 (a) and 10 (b) are diagrams showing detection data on different background colors, and FIGS. 11 (a) and 11 (b). Is a plan view and a front view of an essential part showing the pattern detection method of the cloth, FIG. 12 is a front view of the essential part showing a state in which the cloth is fixed on the pattern matching table, and FIGS. 13 (a) and 13 (b). Is a plan view and a front view of a main part showing a state in which the cloth is transferred to the pattern-matching stacking part, and FIGS. 14 (a) and 14 (b) are a plan view and a front view of the main part showing a retracted state of the cloth pressing part, FIG. Is a front view of the main part showing the position and angle correction state of the pattern matching laminated part, FIG. 16 is a front view of the main part showing the pattern matching completed state, FIG. 17 is a flow chart showing the above operating state, and FIG. 18 is Fig. 19 (a) and 19 (b) are plan views and a partially enlarged view of the upper front body with a pocket, and Fig. 20 is a wrinkle removal of the cloth. Fig. 21 (a), (b), (c) is an explanatory view showing a conventional manual patterning method for the cloth, and Fig. 22 shows the finely cut cloth. FIG. 23 is a perspective view and FIG. 23 is an explanatory diagram showing the appearance of different patterns on different background colors. 1 ... Housing, 2 ... Fabric set table 4 ... Fabric gripping and transporting part, 4b ... Pickup 5 ... Fabric pressing part, 5c ... Presser 6,7,10 ... Lotless cylinder 8 ... Pattern detection table , 8b …… First background color part 8c …… Second background color part, 11 …… Pattern matching table 12,13,14 …… Motor 15 …… Pattern matching laminated part, 17 …… ITV camera 18 …… Camera moving part, 18a …… T-axis motor 18b …… S-axis motor, 20 …… control part 21 …… CPU, 40 …… textile 41 …… stripes (pattern)

Claims (2)

[Claims] 1. A layered fabric is conveyed to a position over each background color of a pattern detection unit in which one preceding fabric is color-coded into background colors having different brightness, and the pattern is formed on each background color. The maximum and minimum values of the detection data of each field of view are detected, the range widths of the two are compared, the background color with a large range width is selected, and the pattern information of the cloth detected on that background color is stored in the memory. After memorizing and fixing and transferring to the pattern matching laminating section located directly below the pattern detecting section, the subsequent fabric is similarly conveyed to the pattern detecting section and the pattern is selected on the selected background color. The tilt angle and the amount of positional deviation with respect to the pattern of the preceding fabric are detected,
Displace the pattern-matching laminated part to correct them, and after that, fix and transfer the rear fabric to the pattern-matching laminated part located directly below it, and move the rear fabric to the front. A pattern matching method for fabrics, which is characterized by pattern-matching and stacking on the fabric. 2. The pattern matching method for a cloth according to claim 1, wherein the background colors having different brightness are white and black, respectively.