JPS603510B2 - electronic embroidery sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention moves a sewing machine needle and workpiece cloth relative to each other based on embroidery pattern data stored in advance in a storage device, and automatically creates a large number of stitches by moving the sewing machine needle up and down. This invention generally relates to a sewing machine that forms characters on processed cloth using embroidery stitches.

In this type of sewing machine described above, calendar data of a large number of stitch forming points corresponding to a required character is stored in a storage means such as a paper tape, a semiconductor recording medium, a floppy disk, etc.
Based on the position data, the sewing machine needle and the embroidery frame holding the work cloth are moved relative to each other, and embroidery characters are formed on the work cloth by a large number of stitches formed as the sewing machine needle moves up and down.

In this specification, embroidery stitches refer to so-called satin stitches in which the distance between threads is small due to zigzag stitches. However, with conventional embroidery sewing machines, it cannot be said that sufficient consideration has been given to reducing the amount of crossing threads when embroidery characters are automatically formed on the fabric, and many post-processing tasks are required to remove the crossing threads. The current situation is that the automatic embroidery sewing function is not fully utilized because it takes time.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic embroidery sewing machine that reduces the generation of crossing threads as much as possible without damaging the appearance of embroidered characters when characters are automatically embroidered over a plurality of lines.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, an industrial sewing machine body 2 consisting of a bed 23 and an arm 2b is placed on a sewing machine table 1.

A needle plate 3 is mounted on the bed 2a, and a needle hole 3a is formed approximately in the center of the needle plate 3. The arm 2M has a needle 4 attached to its lower end, swings through a needle bar holder 5a, and has a needle bar 5 connected to the bar 6'. A first pulse motor 8 is provided which is operatively connected to the adjusting mechanism 7 to set the adjusting mechanism 7 and its swing amount, and the needle bar is rotated as the sewing machine main shaft (not shown) rotates. 6 and the swinging movement of the swinging lever 6 (in the direction of arrow B), the needle 4 moves the workpiece cloth 9 in cooperation with a hook (not shown) in the base of the sewing machine main body.
Form a zigzag lock stitch in the upper left-right direction (direction of arrow B). On the rear side of the upper surface of the sewing machine table 1 are a pair of left and right mounting frames IQ, 1 made of synthetic resin material such as polyacetal.
The bolts are fixed with a plurality of screws at predetermined intervals.

A feed screw 12 and a rotation transmission shaft 13 are rotatably supported between a mounting frame 109 and a mounting frame 109 extending parallel to the upper surface of the sewing machine table. One mounting frame i
A second pulse motor mechanism is attached to rotate the feed screw 12 via a gear mechanism. A third pulse motor 5 for rotationally driving the rotation transmission shaft turtle 3 is mounted on the other mounting frame 111. The feed screw 12 is provided with a × wisteria moving base i so that it can move in its axial direction.
The support section 16a of 6 is inserted, and the
Contains. ×The guide pipe 16b' of the sea bream moving table 16 is supported by a Y-axis moving table 18 so that it can move in the direction of the enemy line, and the Y-axis moving table blade 8 is connected to the rotation transmission shaft 1.
A pair of interlocking wire wealth linked to 3? It is attached to a part of. The embroidery frame 19 made of a synthetic resin material such as polyacetal has a mounting plate part 19a to the Y-axis moving table turtle 8, an annular work cloth holding part 19b with a part of the outer periphery open, and a vertical screw]g
c and an embroidery inner frame 29 into which the work cloth holding portion 19M is inserted and which cooperates with the work cloth holding portion 19M to hold the work cloth 9. Therefore, the embroidery frame 19 holding the workpiece cloth 9 is moved in the left-right direction (arrow x direction) via the feed screw 2, the X-ray moving table turtle 6, etc. based on the rotational drive of the second pulse motor 4. Third
The rotation transmission shaft 1 is based on the rotational drive of the pulse motor 5.
3 "The above-mentioned
direction (direction of arrow Y). A power on switch 21, a power off switch 22, an embroidery start command switch 23, and an emergency stop switch 24 are provided on the lower front surface of the sewing machine table 1.

Furthermore, on the side of the sewing machine table 1, the drive signals for the sewing machine body 2, the first, second, and third pulse motors 8, 14, and the tortoise 5 are transmitted.
A control device 25 is arranged which is connected to a cable 26 for transmitting drive signals. The control rod 25 is the processed cloth 9
It has a keyboard 27 for issuing commands for programming to form required embroidered characters, etc., and a display panel 28 for displaying the results of the operations. Further, as shown in detail in FIG. 2, a character key group 29 consisting of a large number of data input keys is arranged in the left center part of the keyboard 27, and the upper surface of each character key has an embroidered pattern. The alphanumeric character "0" corresponding to "English symbol L" is engraved with kana characters and kana symbols, and the command to select which character among them is given by selectively pressing each character selection key 3Q, 31, 32, 33. This is done by pressing the button.

Furthermore, the kanji selection key 34 has a function of specifying the kanji corresponding to the word selected with the character key by pressing the kana character selection key 32 and operating the character key, and then pressing the kanji selection key 34. It is something. Normally, when these selection keys are not operated, alphanumeric characters are selected from among the above characters. The return key 35 is a key for line feed. Numerical key groups 36 of "0" to "9" are arranged. An enter key 37 arranged below the character key group 29 is used commonly for character keys and numerical keys. The display panel 28 has a large number of segments sufficient to display simple patterns and kanji characters, and a one-line dot matrix display device 38 that sequentially displays characters selected by various input operations by the operator.
, data specifying the arrangement direction and standard of embroidery patterns such as multiple characters and symbols inputted by the operator (Ateran
2-digit 7-segment numerical displays 39, 40 for displaying bag commands and master sis commands; and numerical display displaying pitch data between embroidery patterns such as the plurality of characters and symbols (Pitc is command). 41, a two-digit numerical display 42 that displays data (Size command) indicating the size of the embroidery pattern data selected by the operator; Changes to the standard data regarding the movement direction (B direction), for example, a two-digit numerical display 43 that displays the line thickness of embroidered characters (Width ratio command) to embroidery patterns such as characters stored in advance. The specified number of stitches in each divided block of pattern data is 0, and the zigzag stitch density is
A two-digit numerical table Z indicator 44 is arranged to display the y command).

Next, in FIG. 3, the first to third pulse motors 8,
14, 15, keyboard 27, dot matrix display device 38, numeric displays 39 to 47, memory device (hereinafter referred to as ROM) Z45, readable and writable memory device (hereinafter referred to as RAM) 46 is connected to a central processing unit (hereinafter referred to as CPU) 47.

Note that pattern data for forming various characters is stored in advance in this ROM 45, and RAM 46 is used to temporarily store pattern data of characters to be embroidered which are read out from the ROM 45 by the keyboard 27. be. In the above configuration, a case where uppercase letters of the alphabet are formed by embroidery stitches over two lines will be described with reference to FIG. 4. Regarding the formation of the embroidery seam itself,
This is described in detail in Japanese Patent Application No. 55-37266 filed by the present applicant. First, we will discuss the designation of character placement, etc. in the electronic embroidery sewing machine of this embodiment.
After the power is turned on 3, press the alphabetic symbol selection key 31 on the keyboard 27 and press the character keys "A" and "X", and then the selected characters will be embroidered horizontally.
7 supplies the drive command signal to the first to third pulse motors 8, 14, 15, and the numerical display 39 shows "A".
” and “X” are displayed (in case of vertical arrangement, press the character keys “A” and “Y”). Next, in this state, when you press the multi-layer keys "3" and "0" and the enter key 37, as shown in FIG. The CPU 47 functions so that each character is embroidered on the line, and the numbers ``3'' and ``0'' are displayed on the numeric display 401 (while pressing the number layer keys ``2'' and ``0'', the reference point P2 When the podium key "1" ro is pressed, centering on the horizontal line containing the embroidery, each character is sewn under the horizontal edge containing the reference point PI.The reference point is the point where the needle 4 is point on the cloth). Next, the character key "P", the number layer key "0", "
5" and the enter key 37 is pressed, the CPU 47 functions to set the interval P between each rectangular area 48 to the 5 side, and the numbers "0" and "5" are displayed on the number display 41. Next, when you press the letter key "S", the number key "OJ", and the enter key 37, the CPU 47 functions so that the size of the rectangular area 48 in the The numbers "0" and "8" are displayed on the device 42. Next, when the character key "W", the number layer keys "3" and "2", and the enter key 37 are pressed, the CPU 47 functions so that the thickness of the line formed by the embroidery stitches is on the 3.2 side.
The numbers "3" and "2" are displayed on the number display 43.
Next, when you press the character key "D", numerical calendar keys "0" and "4", and the enter key 37, the CPU 47 functions so that the number of stitches per unit length of the line formed by embroidery stitches is 4, and the number The numbers "0" and "4" are displayed on the display 44. After completing the above operations, select the desired character on the keyboard 27 and press the embroidery start command switch 23 to embroidery the desired character on the work cloth. A drive command signal is supplied to the motors 8, 14, and 15.

Hereinafter, the CPU 47 controls the first to third pulse motors 8, 1.
4 and 15 to input the alphabet capital letters A to D and E selected by the keyboard 27.
The following describes the case where embroidery is sewn with a line break between.
First, press the English signal selection key 31 on the keyboard 27, then press the character keys "A", "B", "C", "D", and the return key 35.
, by pressing the character keys "E", "F", "G" and "H" in this order, the CPU 47 displays the dot matrix display device 38.
When the display shown in FIG. 2 is displayed and the embroidery start command switch 23 is then pressed, the embroidery stitches from the capital letters A to the days shown in FIG. 4 are formed on the workpiece cloth 9.

Note that the symbol ■ on the dot matrix display device 38 is a line break mark. Next, referring to FIG. 4 in detail, the black circles of each capital letter indicate the embroidery stitch start point, the white circles indicate the embroidery stitch end points, the thick lines indicate the embroidery stitches, and the broken lines indicate the straight stitches.

As is clear from FIG. 4, all of the broken lines are covered by the embroidery stitches formed later and are not visible to the outside in the sewing order. After embroidering the alphabet capital letter ○, the CPU 47 turns on the second and third pulse motors 14.
, 15. At this time, first, the first capital letter A of each line is output so as not to pass over the line formed by the alphabet capital letters B through 15. Stitch one stitch at point a, which is to the left of E and above the letter E, and then move to the embroidery start point for the capital letter E. Line spacing (
In this case, consider the interval between the upper and lower areas 48) is the sentence Z
1'2 of area 48 that determines the font size, preferably C
The PU 47 calculates and automatically determines. In FIG. 4, t is a crossing thread between characters, which is ultimately removed by cutting both ends of the thread. As described above, in this embodiment, when starting a line in two lines of automatic embroidery over multiple lines, after the embroidery stitch of the last character forming the line is finished, and before moving to the embroidery stitch start point of the first character of the next line. , the crossing thread t connecting the two characters above is bent without passing over the next line, so a single stitch is performed, so when a line break is made, the second crossing thread t is embroidered after the line break. Since the letter E or the mark formed by the stitches will not be divided into several parts, it will be easier to remove the crossover thread, and there will be no troubles caused by the crossover thread and the threads forming the embroidery stitches getting tangled. There is no possibility that the embroidery stitches will occur or that the aesthetic appearance of the characters formed will be spoiled.

As described in detail above, the present invention can provide an electronic embroidery sewing machine that reduces the generation of crossing threads as much as possible without damaging the appearance of embroidered characters when starting a line in automatic embroidery sewing over multiple lines, and is an industrial improvement. The effect of doing so is huge.

[Brief explanation of drawings]

Fig. 1 is an external view of an electronic embroidery sewing machine showing an embodiment of the present invention, Fig. 2 is a view showing the keyboard and display panel of the control device, Fig. 3 is a block circuit diagram, and Fig. 4 is an embroidery character. It is a figure for explaining formation of. In the figure, 1 is the sewing machine table, 2 is the sewing machine body, 4 is the needle,
8 is a first pulse motor, 9 is a work cloth, 14 and 15 are second and third pulse motors, 19 is an embroidery frame, 25 is a control device, 27 is a keyboard, 28 is a display panel, and 35 is a return key , 45 is ROM, 46 is RAM, 47 is CPU, t
is a crossing thread. Figure Hinazu N Whale Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. A stitch forming means for forming stitches on a work cloth, which has a needle that moves up and down and a hook that cooperates with the needle, and a work cloth holding means for holding the work cloth. , a drive means connected to at least either the stitch forming means or the work cloth holding means for changing the relative position between the needle and the work cloth holding means; and a driving means connected to at least one of the stitch forming means and the work cloth holding means; a storage means in which pattern data constituting a character is stored by a large number of position data indicating positions; and a drive means that outputs a drive command signal in synchronization with the seam forming means based on the position data retrieved from the storage means. The machine is equipped with a central processing unit for forming character stitches on the work cloth, a character key for selecting characters to be sewn, and a line feed key for instructing to divide the selected characters into multiple lines. When starting a line, the central processing unit, after finishing the embroidery of the last character forming the line and before moving to the embroidery start point of the first character of the next line, executes a transition that connects the two characters. An electronic embroidery sewing machine characterized in that a drive command signal is supplied to the drive means to perform one stitch in which the thread is bent without passing over the next row.