JPS5938344B2 - 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, position data of a large number of stitch formation 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 needle and wire rod that hold the sewing machine needle and the workpiece cloth are moved relative to each other, and embroidery characters are formed on the workpiece cloth by a large number of stitches that are formed as the sewing machine needle moves up and down. Ta.

In this specification, the embroidery stitch refers to a so-called satin stitch in which the distance between threads is small due to a zigzag stitch.

However, with conventional embroidery line sewing machines, it cannot be said that sufficient consideration has been given to reducing the number of crossing threads when automatically forming embroidered characters on the processed cloth, and there are many post-processing tasks to remove crossing threads. The current situation is that the automatic embroidery line function is not fully utilized because it takes time.

An object of the present invention is to provide an electronic embroidery line sewing machine that reduces the generation of crossing threads as much as possible without impairing the appearance of embroidered characters, especially when embroidering characters in a horizontal arrangement.

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

In FIG. 1, an industrial sewing machine main body 2 consisting of a bed 2a 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 2b has a needle 4 attached to its lower end and a needle bar 5 connected to a swinging lever 6 via a needle bar holder 5a, and a needle bar 5 is attached to the front of the arm 2b for adjusting the amount of swinging of the swinging lever 6. an adjustment mechanism 7 and a first pulse motor 8 operatively connected to the adjustment mechanism 7 for setting the amount of oscillation thereof;
is provided, and the needle 4 is moved into the hook ( (not shown) to form a zigzag lockstitch seam in the left-right direction (direction of arrow B) on the work cloth 9.

A pair of left and right mounting frames io and 1i made of a synthetic resin material such as polyacetal are fixed to the upper rear side of the sewing machine table 1 with a plurality of screws at predetermined intervals.

A feed screw 12 and a rotation transmission shaft 13 are rotatably supported between mounting frames 10 and 11 so as to extend parallel to the upper surface of the sewing machine table 1.

A second pulse motor 14 is mounted on one of the mounting frames 10 so as to rotate the feed screw 12 via a gear mechanism.

A third pulse motor 15 for rotationally driving the rotation transmission shaft 13 is mounted on the other mounting frame 11'.

A support portion 16a of an X-axis moving table 16 is inserted into the feed screw 12 so that it can move in the axial direction.
The shaft moving table 16 includes a guide pipe 16b extending in a direction perpendicular to the feed screw 12 and the rotation transmission shaft 13, and a front support portion 16c.

A Y-axis movable base 18 is fitted and supported in the guide pipe 16b of the X-axis movable base 16 so as to be movable in the axial direction. It is fixed to a part of the connecting wire 17.

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 18, an annular work cloth holding part 19b with a part of its outer periphery open, a tightening screw 19c, and the work cloth holding part 19b. The embroidery frame 20 includes an embroidery inner frame 20 that is inserted into the embroidery inner frame 20 and cooperates with the embroidery inner frame 20 to hold the work cloth 9.

Therefore, the embroidery frame 19 holding the work cloth 9 is moved in the left-right direction (in the direction of the arrow X) via the feed screw 12, the Based on the rotational drive of the pulse motor 15, it is moved in a direction perpendicular to the X direction (arrow Y direction) via the rotation transmission shaft 13, the connecting wire 17, the Y-axis moving table 18, etc.

A power on switch 21 is located on the lower front of the sewing machine table 1.
, a power off switch 22, an embroidery start phase ◇ switch 23, and an emergency stop switch 24 are provided.

Furthermore, a control device 25 connected to a cable 26 for transmitting drive signals for the sewing machine main body 2 and drive signals for each of the first, second, and third pulse motors 8, 14, and 15 is arranged near the sewing machine table 1. has been done.

The control device 25 has a keyboard 27 for issuing commands for programming to form required embroidered characters on the work cloth 9, and a display panel 28 for displaying the results of the operations.

Also, as shown in detail in FIG.
A character key group 29 consisting of a large number of data input keys is arranged in the left center part of the screen, and the upper surface of each character key displays alphanumeric characters, English symbols, kana characters, and kana characters corresponding to the embroidery pattern. Symbols are engraved on it, and the command to select which character among them is given by pressing each character selection key 30, 31.
, 32° and 33 are selectively pressed.

Furthermore, the kanji selection key 34 has the function of specifying the kanji corresponding to the word selected with the character key by pressing the kanji selection key 34 after pressing the kana character selection key 32 and operating the character key. be.

Incidentally, normally, when these selection keys are not operated, alphanumeric characters are selected from among the above-mentioned characters.

On the right side of the keyboard 27, a group 35 of numerical keys from "0" to "9" are arranged.

Enter key 3 located below the letters/key group 29
6 is commonly used 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 16-digit dot matrix display device 37 that sequentially displays characters selected by various input operations by the operator. 2-digit, 7-segment numerical display 3B, 39, which displays specified data (Arrange finger cold and Ba5is finger A?) of the arrangement direction and standard of the embroidery patterns such as a plurality of characters, symbols, etc. that have been input and specified;
; A numeric display 40 that displays pitch data (pitch command) between the embroidery patterns such as the plurality of characters, symbols, etc., and data (Size finger ◇ ), a two-digit numeric display 41 that displays pre-stored characters, symbols, etc. in the embroidery pattern needle 4 swing direction (direction B (E)) changes data to standard data, i.e., for example, embroidery characters. Line thickness Wid
The two-digit numerical display 42 displays the zigzag stitch density 1 (th command), and the specified number of stitches in each divided block of pattern data of embroidery patterns such as characters stored in advance, that is, zigzag stitch density 1 ( A two-digit number display 43 is arranged to display the Density finger ◇).

Next, in FIG. 3, the first to third pulse motors 8,
14, 15, a keyboard 27, a dot matrix display device 37, numeric displays 3B to 43, a read-only storage device (hereinafter referred to as ROM) 44, and a readable and writable storage device (hereinafter referred to as RAM) 45. It is connected to a central processing unit (hereinafter referred to as CPU) 46.

Note that pattern data for forming various characters is stored in advance in the ROM 44, and the RAM 44 is for temporarily storing pattern data of characters to be embroidered lines read from the ROM 44 by the keyboard 27.

In the above configuration, the case where uppercase letters of the alphabet are formed by embroidery stitches will be described with reference to FIGS. 4 and subsequent figures.

. First, to specify the arrangement of characters, etc. in the electronic embroidery line sewing machine of this embodiment, after turning on the power, press the English symbol selection key 31 on the keyboard 27 and press the character key r.
When AjrXJ is pressed, a drive command signal is supplied from the CPU 46 to the first to third pulse smokers 8, 14, 15, and the numeric display 38 is sent so that the subsequently selected characters are embroidered in a horizontal arrangement. The characters rAJrXJ are displayed (in case of vertical layout, press the character key rAjrYj
Press .

). Next, in this state, when the number keys "3" and "0" and the enter key 36 are pressed, as shown in FIG. In order for each character to be embroidered on the horizontal line, the CPU
46 functions, and the numbers "3" and "0" are displayed on the number display 39 (note that when you press the number keys "2" and "0", the number keys "1""
0" is pressed, each character is embroidered under the horizontal line including the reference point P1.

Here, the reference point refers to the point on the cloth where the needle 4 is located when the embroidery sequence starts.

). Next, when the character key "P", the number keys "0" and "5", and the enter key 36 are pressed, the CPUJ 6 functions so that the interval P between each rectangular area 47 becomes 5, and the numeric display 4
The number rOJr5j is displayed at 0.

Next, when you press the letter key "S", number keys "0" and "8", and the enter key 36, the size of the rectangular area 47 in the X and Y directions becomes 8 and 10mrn, respectively.
46 functions, and the number r(Nr8j) is displayed on the number display 41.

Next, when you press the letter key "W", the number keys "3" and "2", and the enter key 36, the CPUJ6 will function so that the thickness of the line that will stop at the embroidery line will be 3.2 mm, and the number display will be displayed. The numbers "3" and "2" are displayed at 42.

Next, when the character key rDJ, number key rOJr4J, and enter key 36 are pressed, the CPU 46 functions so that the number of stitches per unit length of the line formed by the embroidery line is 4, and the number display 43 shows "0". ” and “4” are displayed.

After completing the above operations, enter the desired characters on the keyboard 27.
When the embroidery start command switch 23 is pressed, the CPUJ 6 supplies a drive command signal to the first to third pulse smokes 8, 14, and 15 in order to embroidery the desired character on the work cloth. do.

Hereinafter, the CPU 46 operates the first to third pulse smokes 8,1.
4. By supplying the drive finger◇ signal to 15, the alphabetic capital letters A, H, K and X selected by the keyboard 27
A specific example will be described in which the embroidery stitches are formed using embroidery stitches so that the number of crossing threads is extremely reduced.

(1) Alphabet letter A As shown in Figure 5 showing the order of the embroidery lines and Figure 6 showing the stitches, ■ Embroidery line on the left side from the first embroidery edge starting point a1 ■ Embroidery line on the right side slope , Embroidery line from top to bottom from the part that touches the center horizontal line■ Move from the right end of the center horizontal line to the left end, which is the second stitch, line gutter starting point a2, without creating an embroidery line■ Move the center horizontal line from left to right Embroidery line■ If you form the alphabet letter A in the above order from the bottom of the right side slanted line where it touches the center horizontal line, from top to bottom, the thread produced by the trowel will be used for the embroidery in step ■. Since it is covered by the wire, there is no crossover thread to be removed.

Here, movement without creating an embroidery line refers to movement that does not affect the appearance of the embroidery line that later covers the thread, such as movement by straight stitching or coarse zigzag stitching, and the same applies hereinafter.

Incidentally, FIGS. 7 and 8 are views corresponding to the above-mentioned FIG. 5, and show cases in which the crossing threads appear on the surface in steps ① and ②, respectively, which is undesirable.

(I) Alphabet letter H As shown in Figure 9 showing the order of the embroidery lines and Figure 10 showing the stitches, ■ From the bottom of the left vertical line where it touches the center horizontal line,
Move the embroidery line upward from the embroidery line starting point h1 ■ From the part of the left vertical line that touches the center horizontal line to the upper end, which is the second embroidery line start point h2, without creating an embroidery line ■ The center horizontal line of the left vertical line Embroidery from the part that touches the center horizontal line, from top to bottom) Reef stitch■ Embroidery line from left to right on the center horizontal line■ From the part of the right vertical line that touches the center horizontal line to the upper end, which is the third embroidery line starting point h3, Move the embroidery line without causing any embroidery line■ Embroidery line on the right side vertical line from top to bottom If the alphabet letter H is formed in the above order, the threads produced in the above steps ■ and ■ will be covered by the embroidery lines in steps ■ and ■, respectively. Therefore, there are no crossing threads to be removed.

(I) Figure 11 showing the order of stitches and gutter in the alphabet letters and Figure 1 showing the stitches thereof
As shown in Figure 2, ■ From the part of the left vertical line that touches the right upward slope line,
Embroidery line from 1 to the starting point of the first embroidery line upwards■ Move from the part of the left vertical line that touches the upward slope line to the right to the upper end of 2, which is the starting point of the second embroidery line, without creating an embroidery line■ Left side From the part of the vertical line that touches the upward sloping line to the right,
Embroidery line from top to bottom■ Embroidery line from the part of the upward sloping right line that touches the downward sloping right line to the lower left, and from the lower left to the upper right■ The third embroidery line from the part of the upward sloping right line that touches the downward sloping right line Move to the upper right corner with 3 as the starting point without creating an embroidery line ■ Embroidery line from the part of the upward sloping right line that touches the downward sloping right line to the upper right, from the upper right to the lower left ■ The downward sloping right line from the upper left to the right If the alphabet letter K is formed in the embroidery line below in the above order, the above steps ■ and ■ are completed.
Since the threads produced in step (2) are covered by the embroidery lines in steps (2) and (2), there are no crossover threads to be removed.

OV) Alphabet letter X Figure 13 showing the order of embroidery lines and Figure 14 showing the stitches thereof
As shown in the diagram, ■ Move the lower left sloped line from the intersection to the first embroidery line starting point
From the intersection point to the embroidery line ■ From the intersection point to the upper right corner, which is the second embroidery line starting point X2,
Move without creating an embroidery line■ Move the embroidery line from the intersection point to the upper right slanted line from the upper right to the intersection point...■ Move from the intersection point to the upper left corner, which is the third stitch and line gutter starting point X3, without creating an embroidery line■ From the upper left edge If the alphabet letter X is formed in the above-mentioned order of embroidery lines at the lower right end, the threads produced in steps (2) and (2) are covered by the embroidery lines of steps (2) and (2), respectively, so no crossover threads are generated to be removed.

Next, the CPU 46 operates the first to third pulse smoke 8.
, 14, 15 to input the 7 driving finger 4 signals to select the uppercase letters C, E, F of the alphabet selected by the keyboard 21.
, G, I, L, T, U, V.

Another specific example will be described in which embroidery stitches are formed so that the number of threads crossing W, Y, and Z is extremely small.

Fig. 15, Fig. 11, Fig. 19, Fig. 21, Fig. 23,
Figure 25, Figure 27, Figure 29, Figure 31, Figure 33,
Figures 35 and 37 are C2E, F, G, I, and L, respectively.
, T, U, V, W, Y and Z embroidery lines;
Figure 4, Figure 26, Figure 28, Figure 30, Figure 32, Figure 3
4, FIG. 36, and FIG. 38 are diagrams showing the stitches of each capital letter of the alphabet.

In addition, the sewing order is from the smallest circled number in the diagram, the broken lines are moved without forming embroidery lines (moved by straight stitches, rough zigzag stitches, etc.), and thick lines do not mean embroidery lines. This is the same as in the previous embodiment.

Therefore, the alphabet letter C reaches the embroidery line starting point CI from the lower end of the thread produced by the steps ■ to ■ due to the embroidery line of step ■, and the alphabet letter E moves from its lower end to the first embroidery line starting point e1 and from the step ■. The threads produced by the steps ■, ■, and ■ that reach the second embroidery continuation starting point e2 are the steps ■, ■.

With the embroidery lines of ■ and ■, the alphabet letter F reaches the first embroidery series starting point f1 from its lower end, and the process ■ and ■ reaches the second embroidery series starting point f2 from the step ■.

The threads produced by ■ are embroidered by the embroidery lines of steps ■, ■, and ■.
The alphabet letter G moves from its lower end to the first embroidery series starting point g1, from step ■ to the second embroidery series starting point g2, and from step ■
Steps of reaching the third embroidery continuation starting point g3 from ■ to ■, ■
The thread produced by step ■ reaches the embroidery line of step ■, The thread produced in step (2) reaches the embroidery series starting point 11 from the lower end, and the alphabet letter T moves from the lower end to the first embroidery series starting point t1 and from step (2) to the second embroidery series starting point t2. The process of reaching ■, ■.

The threads produced by ■ are embroidered by the embroidery lines of steps ■, ■, and ■.
The alphabet letter U is threaded from the lower end to the first embroidery series starting point u1 and the threads produced by the steps ■ to ■ and ■ to ■ from step ■ to the second embroidery series starting point u2 are the threads produced by steps ■ and ■.
According to the embroidery line, the alphabet letter ■ reaches the first embroidery series starting point ■1 from its lower end, and the thread produced by process ■ and ■ reaches the second embroidery series starting point ■2 from step ■.
.

According to the embroidery line of ■, the alphabet letter W reaches the first embroidery series starting point w1 from its lower end and the second embroidery series starting point w2 from the step ■■. The resulting thread reaches the embroidery line in steps ■ and ■, and the alphabet letter Y reaches the first embroidery series starting point y1 from its lower end, and the second embroidery series starting point y2 from the process ■.
The thread produced by ,
Since the threads produced in steps (1) and (1) are covered by the embroidery lines in steps (2) and (2), respectively, there are no crossing threads to be removed.

In addition, as in the previous embodiment, the sewing start and end points of alphabet letters in this embodiment are both at the bottom edge, so when forming a plurality of letters in a horizontal arrangement, the crossing threads between the letters are Only one occurrence is enough.

That is, for example, when forming alphabetic character C after alphabetical character A, if you move directly from the lower right corner of character A to the embroidery continuation start point of character C (in this case, either end of a single curve), the character will be formed. The embroidery line forming the curved part of C cuts the crossing thread between both characters, resulting in two crooked crossing threads to be removed.

Although the present invention is most easily applied to uppercase letters of the alphabet due to the shape of the characters, it can also be applied to katakana characters and the like.

Furthermore, the present invention is not limited to the case where it is applied to all uppercase letters of the alphabet, for example, and the effects of the present invention can be obtained even when applied to specific characters.

As detailed above, the present invention can provide an electronic embroidery line sewing machine that can reduce the occurrence of crossing threads without damaging the appearance of embroidered characters when embroidering characters in a horizontal arrangement. .

[Brief Description of the Drawings] Fig. 1 is an external view of an embodiment of the electronic embroidery line sewing machine of the present invention;
Fig. 2 shows the keyboard and display panel of the control device, Fig. 3 is a block circuit diagram, Fig. 4 shows the arrangement of embroidered characters, and Fig. 5 shows the case where the present invention is applied to alphabet letter A. Figure 6 is a diagram showing the stitches thereof; Figures 7 and 8 are diagrams showing the order of undesirable embroidery lines of alphabet letter A; Figures 9, 11, and 13 are diagrams showing the order of the embroidery lines of the present invention. A diagram showing an example of the order of embroidery lines when applied to alphabet letters H and X, respectively, No. 10゜12.14
The figure shows those seams, No. 15゜17.19,21
, 23, 25, 27, 29° 31. 33, 35, 37 Figures 33, 35, and 37 illustrate the present invention using the alphabet letters C, B, F, G, I, respectively.
,L,T,U. Diagram showing an example of the order of embroidery lines when applied to v, w, y, z, No. 16, 18, 20, 22, 24° 26.28, 3
Figures 0, 32, 34, 36, and 38 are diagrams showing the stitches of the characters, respectively. 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, 14.15 is a second and third pulse motor, 19 is an embroidery frame, 25 is a control device, 27 is a keyboard, 28 is a display panel, 44 is an RO
M, 45 is RAM. 46 is a CPU.

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 feeding means for feeding the work cloth; a drive means connected to at least either the stitch forming means or the work cloth feed means for changing the relative position between the needle and the work cloth feed means; and a drive means connected to at least the stitch forming means or the work cloth feed means; It has a storage means in which pattern data constituting a character is stored by a large number of position data indicating the position, and the drive command signal is sent to the seam forming means in synchronization with the seam forming means based on the position data taken out from the storage means. In an electronic embroidery line sewing machine, the electronic embroidery line sewing machine is equipped with a central processing unit for supplying power to a driving means and for forming character stitches on a workpiece cloth. Immediately from the bottom edge of the character, preferably after embroidering a part of the line, to the starting point of the embroidery line away from the bottom edge of the character.
The electronic embroidery line is characterized in that a driving finger◇ signal is supplied to the driving means so that the electronic embroidery line moves through a portion later covered by the embroidery line without forming the embroidery line, and then starts the embroidery line. sewing machine.