JPH06327874A - Embroidery sewing machine - Google Patents

Abstract

PURPOSE:To enhance the workability and to save an embroidery yarn by inhibiting an area to be sewn from being sewn over if the color of a needle yarn is substantially identical with that of a cloth, in the case of sewing over areas to be sewn with yarns having different colors so as to form an embroidery pattern. CONSTITUTION:A CPU 30 for controlling a sewing machine as a whole is connected thereto with a ROM 32, in which sewing data for embroidery patterns to be formed with the use of a plurality of yarns having different colors are stored, and a RAM 34 provided with a memory area, in which data can be written during computation. The CPU 30 analyzes colors by means of a cloth color identifying circuit 36 in accordance with an output from a color sensor 28 in order to identify a color of a cloth to be sewn. Further, sewing data are taken out one by one from the ROM 32, and an embroidery frame is moved by means of an embroidery frame drive circuit 38 is moved so as to form an embroidery frame. When color change data are read, the sewing machine is once stopped, and a color in an area to be sewn is compared with a color of a cloth to be fabricated. If it is determined that they are the same, the area is inhibited from being sewn over.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine capable of sewing one embroidery pattern using a plurality of threads of different colors.

[0002]

2. Description of the Related Art Conventionally, in such an embroidery sewing machine, a user replaces the upper thread with a thread of a different color to form an embroidery pattern of a plurality of colors. Further, the embroidery pattern is formed on the basis of the sewing data stored in advance, and the sewing data includes thread change data indicating the replacement time of the upper thread. The yarn change instruction is notified.

The embroidery pattern is selected with reference to a book whose sample is printed in multicolor. When the user is notified of the thread change, he replaces the upper thread with the color of this book. Then, the sewing data is configured to sew all predetermined sewing areas in a predetermined order.

[0004]

However, since the sewing data is configured to sew all the embroidery patterns, depending on the color of the cloth, a part of the embroidery pattern that is the same as the color of the cloth (hereinafter referred to as the same color). Area does not have to be sewn with a needle thread of the same color as the color of the cloth, but in the conventional embroidery sewing machine, even if the same color area is already a predetermined color, Was also sewn, wasting thread changing time, sewing time, and wasting embroidery thread.

The present invention has been made to solve the above problems, and an object thereof is to provide an efficient embroidery sewing machine.

[0006]

In order to achieve this object, in the embroidery sewing machine according to claim 1 of the present invention, the color of the upper thread and the color of the cloth used in each sewing area are substantially the same. The color determining means for specifying or determining, and the sewing area for which the color determining means determines that the color of the upper thread and the color of the cloth are substantially the same, the prohibition means for prohibiting the sewing of at least a part of the sewing area. It has and.

Further, in the embroidery sewing machine according to a second aspect of the present invention, the area color detecting means for detecting the color of the sewing area, the upper thread color detecting means for detecting the color of the upper thread, the area color detecting means and the upper thread color detecting means. And a color determination unit for designating or determining that the color of the upper thread and the color of the cloth used in each sewing area are substantially the same, based on the detection result of the unit.

[0008]

In the embroidery sewing machine according to claim 1 of the present invention having the above-mentioned structure, the color determining means specifies that the color of the upper thread and the color of the cloth used in each sewing area are substantially the same, or It is possible to determine whether the color colored by the upper thread is substantially the same as the color of the cloth. The prohibition means is
For the sewing area in which the color of the upper thread and the color of the cloth are judged to be substantially the same by the color judging means, sewing of at least a part of the sewing area is prohibited, and sewing is performed using the upper thread of the same color as the cloth. Reduce crushing.

Further, in the embroidery sewing machine according to the second aspect, the area color detecting means detects the color of the sewing area. The upper thread color detecting means detects the color of the upper thread. The color judging means automatically designates or judges that the color of the upper thread and the color of the cloth used for each sewing area are substantially the same, based on the detection results of the area color detecting means and the upper thread color detecting means. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

Since the stitch forming mechanism for forming the stitches is the same as the conventional one, its explanation is omitted.

First, the external structure of the sewing machine M will be described.

A pattern selection switch 10 for selecting an embroidery pattern and a display 12 for displaying the embroidery pattern are arranged on the front surface of the pedestal portion 2 standing on the right side of the bed portion 1 of the sewing machine M to the arm portion 3. ing. The tip portion 14 of the arm portion 3
Is provided with a start / stop switch 18 for operating or stopping the sewing machine M.

Further, a sewing needle 19 is arranged on the lower end 14 of the arm 3 so as to be vertically movable. An illumination light source 26 that emits light downward is provided on the right side of the sewing needle 19, and
No. 139855, an amorphous integrated color sensor 28 by a three-color separation method is arranged, and the color sensor 28 receives light from an illumination light source 26 as indicated by an arrow. Has been done.

A well-known embroidery device 30 is mounted on the bed 1, and an embroidery frame driving device 30b for moving the embroidery frame 30a relative to the sewing needle 19 is mounted on the embroidery device 30.
Is provided. The work cloth W is attached to the embroidery frame 30a.
Is configured to be held like a one-dot chain point.

Next, the electrical construction of the sewing machine M will be described.

A ROM 32 and a RAM 34 of a storage device are connected to a CPU 30 which controls the entire sewing machine M.

The ROM 32 has a storage area for storing sewing data of an embroidery pattern formed by using a plurality of threads of different colors. The sewing data is composed of feed data for moving the embroidery frame 18, color change data for changing the upper thread, color data representing the color of the upper thread, and the like. Furthermore, R
The OM 32 has a storage area for storing a flowchart as shown in FIG. The RAM 34 is provided with a storage area in which the data being processed can be written.

The CPU 32 is configured to analyze the color of the light received by the 36b color sensor 28 via the fabric color identification circuit 36. Cloth color identification circuit 36
Is the color of the light received by the color sensor 28.
In principle, red (R), green (G), and blue (B) output signals are A / D converted and output to the CPU 30. The CPU 30 is configured to determine the color of the work cloth W from the A / D converted value. CPU32
Through the embroidery frame drive circuit 38, the embroidery frame drive device 44
Is configured to control.

The CPU 30 reads the sewing data from the ROM 32 one by one and moves the embroidery frame 22 by the embroidery frame drive device 24 through the embroidery frame drive circuit 38 to form an embroidery pattern. Further, when the CPU 30 reads the color change data from the ROM 32, the sewing machine 16 is temporarily stopped to change the upper thread. Furthermore, at the time of this suspension,
The CPU 30 is configured to display what color the designated color of the book on which the sample of the embroidery pattern is printed is. When the color change data is read, the CPU 30 is configured to execute the subroutine shown in FIG. Then, the CPU 30 is configured to execute a known sewing subroutine subsequent to the subroutine shown in FIG.

Next, the operation for forming the embroidery pattern of the face 50 as shown in FIG. 4 will be described. The color of the work cloth W is red. Mouth 52 is red, eyebrows 54,
It is predetermined that the pupil 56 and the nose 58 are embroidered in black. And the rest 59 of the face 50
It is previously determined that (hereinafter referred to as the surface portion 59) be embroidered in white.

Further, the sewing data of the embroidery pattern is such that the mouth portion 52, the eyebrows 54, and the pupil 5 on the surface portion 59.
6 and the nose 58 are not overlapped and sewn. Furthermore, the order of embroidering is face 59 and mouth 5.
The sewing data is configured in the order of 2, eyebrow 54, pupil 56, nose 58. The color data of the sewing data is configured such that the first color is white, the second color is red, and the third color is black.

First, an instruction to use the white upper thread is displayed on the display unit 12, and the surface 59 is embroidered. When the embroidery of the face portion 59 is completed and the color change data for the next mouth portion 52 is read, it is detected that the color of the upper thread for sewing the mouth portion 52 is red based on the color data. (S
1). Next, it is detected that the color of the work cloth W is red based on the detection result of the cloth color identification circuit 36 (S
2). Then, it is determined that the color of the upper thread for sewing the mouth portion 52 and the color of the work cloth are both red (S).
3: YES). Then, the feed data is successively read (S4, S5: NO), and the embroidery sewing machine M is stopped.

When the color change data for sewing the eyebrows 54 is read (S5: YES), similarly, the color of the upper thread for sewing the eyebrows 54 and the color of the work cloth are detected ( (S1: black, S2: red), it is determined that the color of the upper thread and the color of the work cloth are different (S3:
NO). Therefore, after the instruction that the white upper thread should be used to embroider the face portion 59, the instruction that the black upper thread should be used to embroider the eyebrow 54 is displayed on the display unit 12. . When the black upper thread is attached and the start / stop switch 18 is pressed, subsequently, the eyebrows 54 and the like are sequentially embroidered by the sewing subroutine.

Thus, even if it is decided in advance to sew, if the same color as the cloth is not sewn, the waste of the thread is eliminated and the time is shortened. Further, the thread changing time is also shortened because the red thread is not attached to the sewing machine M.

Although the color of the upper thread is used as data in this embodiment, the color of the upper thread is identified by a color identification circuit using a light source for illumination, a color sensor or the like as in the color identification of the cloth to be processed. You can go.

In the present embodiment, the same color area is not embroidered at all, but if the upper thread of the same color as the cloth to be processed is embroidered along the outer shape of the same color area, the same color area is Since the contour is clear, it is possible to prevent the quality from being deteriorated.

Further, in the processing of S1 to S3 of this embodiment, it is judged that the color of the thread and the color of the cloth are the same, and the control is carried out. However, instead of S1 to S3, the operator sew You may comprise so that the same color area which does not need to be crushed may be designated manually.

[0029]

As is apparent from the above description, in the embroidery sewing machine according to the first aspect of the present invention, since the sewing with the thread of the same color as the cloth to be sewn is reduced, the embroidery sewing time is reduced. In addition to being shortened, waste of yarn is prevented.

Further, in the embroidery sewing machine according to the second aspect of the present invention, since the sewing with the thread of the same color as the cloth to be sewn is automatically reduced, the usability is improved.

[Brief description of drawings]

FIG. 1 is a flow chart for explaining the operation of an embroidery sewing machine according to an embodiment of the present invention.

FIG. 2 is an external view of the sewing machine.

FIG. 2 is a block diagram showing an electrical configuration of the sewing machine.

FIG. 4 is an explanatory diagram of an embroidery pattern embroidered by the sewing machine.

[Explanation of symbols]

 26 Illumination Light Source 28 Color Sensor 36 Cloth Color Identification Circuit 10 Pattern Selection SW 24 Embroidery Frame Drive Device 32 ROM 30 CPU

Claims (2)

[Claims] 1. An embroidery sewing machine that sewes an embroidery pattern consisting of a plurality of sewing areas using a plurality of upper threads of different colors so as to sew the plurality of sewing areas based on prestored data. Color determining means for designating or determining that the color of the upper thread and the color of the cloth used for each sewing area are substantially the same, and the color of the upper thread and the color of the cloth are substantially the same by the color judging means. An embroidery sewing machine which has a prohibition means for prohibiting the sewing of at least a part of the sewing area for the sewing area determined to be. 2. An area color detecting means for detecting a color of the sewing area and an upper thread color detecting means for detecting a color of the upper thread, wherein the color determining means includes the area color detecting means and the upper thread. 2. An embroidery sewing machine according to claim 1, wherein the embroidery sewing machine specifies or determines that the color of the upper thread and the color of the cloth used in each of the sewing areas are substantially the same, based on the detection result of the color detection means.