JPH0790060B2 - Sewing machine embroidery data creation device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine embroidery data creation device for creating necessary needle position related data and embroidery data for specifying needle drop points in a sewing machine for embroidering a predetermined figure on a work cloth. Regarding

[0002]

2. Description of the Related Art In a sewing machine that executes embroidery of a predetermined figure such as a one-point mark, a sewing machine control device operates a work cloth based on embroidery data that specifies a needle drop point corresponding to the figure. Alternatively, the embroidery operation is advanced while sequentially moving the sewing needle. In this case, the embroidery data is automatically created by the embroidery data creation device.

This embroidery data creating apparatus is provided with a microcomputer, an input device such as an image scanner and a keyboard, an external storage device, etc., and is based on, for example, an operator inputting information relating to a figure for which embroidery data is to be created. Then, the embroidery data is automatically calculated.

As an example, a figure A to be embroidered is shown in FIG.
When the shape is as shown in 0 (a), information of the contour line (curve 1-3, curve 2-3, straight line 1-2), start point and end point information (point 1 is start point, point 3 is end point) ), Thread density information and the like are input. Then, the embroidery data creating apparatus is shown in FIG.
As shown in (b), a pair of opposing main side portions (curve 1-3 and curve 2-3) that compose the contour of the figure A and extend in the embroidery traveling direction (the direction of the arrow in the figure) are formed according to the thread density. Then, the needle drop points are equally divided and the embroidery data is set so that the needles drop alternately on the main sides.

With such embroidery data, as shown in FIG. 10 (c), the work cloth is embroidered so that the inside of the figure A is filled with satin stitches.
By storing the embroidery data created in this way in an external storage device, it can be recalled and used any number of times.

In order to reduce the data volume and facilitate editing, needle position related data called block data for a predetermined figure is created, and embroidery data is executed from this block data. Some of them are created each time.

When this block data is used, for example, as shown in FIG. 11 (a), the figure B shows the embroidery advancing direction (arrow direction in the figure) from the contour line information (characteristic points 1 to 14). By setting a number of sub-edges that are substantially orthogonal to each other, as shown in FIG. 11B, the blocks are divided into several rectangular blocks. Then, for example, the apexes of one block are numbered as points 1, 2, 3, 4 in the advancing direction of the embroidery operation, and their respective positions (coordinates) are given as block data.

In this case, for example, the block may become a triangle at the end portion of the figure B, but in this case, by adding two numbers, for example, 3 and 4, to one vertex, it becomes a quadrangle. I handle them in the same way.

In order to create embroidery data from the block data created in this way, a so-called one-needle deployment operation is performed. This is as shown in FIG.
-3 and 2-4 are equally divided according to the thread density to obtain needle drop points, and the embroidery data is set so that the needles drop alternately on the main sides.

As a result, embroidery is performed in which the block is filled with satin stitches.
When the blocks are continuous, one stitch is continuously developed for the next block, whereby the embroidery operation is continuously executed as shown in FIG. 11 (c). In this case, the control device only needs to store the block data, so the storage capacity is much smaller than when the entire embroidery data is stored, and editing such as enlargement and reduction can be performed easily. You can do it.

[0011]

In the conventional embroidery data creation device, when the embroidery data is created directly,
The stitch of the embroidery applied by the created embroidery data is formed so as to extend between the main side portions at an angle close to a right angle with respect to the embroidering direction. Even when creating block data, the sub-sides are set so as to extend in a direction substantially perpendicular to the embroidery traveling direction.
The stitch of the embroidery applied by the embroidery data created from the block data is formed to extend between the main sides at an angle close to a right angle with respect to the embroidery traveling direction.

By the way, when the length of the stitch of the embroidery becomes short (for example, less than 1 mm), the sewing needle falls to almost the same position on the work cloth, and the stitch becomes a dumpling.
There is a risk that beautiful embroidery cannot be applied. Therefore, in the case where a stitch extending between a pair of main side portions in a substantially orthogonal direction is formed, when the interval between the main side portions is narrow as in the right end portion of the figures shown in FIGS. 10 and 11, There was a problem that beautiful embroidery could not be applied.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide embroidery data capable of executing beautiful embroidery even in a portion where a space between main sides of a figure becomes narrow. It is to provide a sewing machine embroidery data creation device that can create.

[0014]

SUMMARY OF THE INVENTION A first embroidery data creating device for a sewing machine according to the present invention embeds the necessary needle position-related data in a sewing machine that embroiders a predetermined graphic on a work cloth. Is formed based on division into a plurality of rectangular blocks surrounded by a pair of main side portions extending in the traveling direction of and a pair of sub side portions adjacent to the main side portion, and the sub side portions of each block. And a block changing unit for changing the divided shape of the block including the corresponding sub-side when the calculation result by the calculating unit is less than a predetermined length. Have.

The second sewing machine embroidery data creation device of the present invention creates embroidery data that specifies each needle drop point in the sewing machine that embroiders a predetermined figure on the work cloth. The needle drop point setting means for arranging the needle drop points alternately on a pair of opposing main sides that form the contour of the figure and extend in the embroidery traveling direction, and the needle drop point set by the needle drop point setting means Stitch length calculation means for calculating the stitch length from one needle drop point to the next needle drop point, and when the result of calculation by this stitch length calculation means is less than a predetermined stitch length, the main edge corresponding to the stitch drop point It is characterized by including a needle drop point changing means for changing the position to another position on the section.

[0016]

According to the first embroidery data creating device of the sewing machine of the present invention, the length of the sub-side portion of each block forming the figure is calculated by the calculating means. When the calculation result is less than the predetermined length, the block changing unit changes the divided shape of the block including the corresponding sub-side portion.
As a result, even if the space between the main side portions is narrow, the sub side portion of the block is formed with an inclination with respect to the embroidery advancing direction, and the sub side portions of all blocks are formed. Is longer than a predetermined length.

Therefore, even in the embroidery data created from the block data, the stitches are extended with an inclination with respect to the embroidery advancing direction, and as a result, the intervals between the main sides are narrowed. Even if there is, it will be possible to secure a certain stitch length.

Further, according to the second embroidery data creating device of the sewing machine of the present invention, the needle drop point setting means arranges the needle drop points alternately on the pair of opposing main sides, and the stitch length calculating means. Thus, the stitch length from one needle drop point to the next needle drop point at the set needle drop point is calculated. When the calculated result does not reach the predetermined stitch length, the needle drop point changing means changes the position of the corresponding needle drop point.

Therefore, the stitches are extended with an inclination with respect to the embroidery advancing direction, and as a result, a stitch length of a predetermined length or more is secured even in a portion where the interval between the main sides is narrowed. Will be able to.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The first embodiment corresponds to claim 1.

First, a schematic structure of the embroidery sewing machine will be described with reference to FIG. The sewing machine main body 11 is configured to integrally include an arm portion 13 above the bed portion 12, and is incorporated in the sewing machine table 14. A needle bar 16 having a sewing needle 15 is provided at the tip of the arm portion 13, and a needle plate 17 having a needle hole (not shown) corresponding to the needle bar 16 is provided on the bed portion 12. . Although not shown in detail, the needle bar 16 is vertically driven by a sewing machine motor 18 (see FIG. 3) via a needle bar drive mechanism, and the needle plate 17 of the needle plate 17 is provided in the bed 12. A shuttle mechanism provided below is driven by the sewing machine motor 18 in synchronization with the needle bar 16.

An embroidery frame 19 for holding a work cloth (not shown) is provided on the sewing machine table 14. The embroidery frame 19 includes an annular outer frame 19a and the outer frame 19a.
And a ring-shaped inner frame 19b that is detachably fitted into the inner peripheral portion of the inner frame, and the inner frame 19b is fitted into the outer frame 19a so that the work cloth is sandwiched between the inner frame 19b and the inner frame. It is designed to be held in a stretched state within 19b. The embroidery frame 19 can be freely moved in the horizontal direction on the sewing machine table 14 by a horizontal movement mechanism 20 described below.

That is, the slide plate portion 19c provided integrally with the outer frame 19a is slidably attached to the two slide bars 23 and 24 provided between the support bases 21 and 22. The one support base 21 is the motor mounts 25, 2 mounted on the sewing machine table 14.
A feed screw 27 extending in a direction orthogonal to the slide bars 23 and 24 is engaged between the six. This lead screw 27
Is rotatably driven by an X-axis feed motor 28 attached to the motor mount 25, whereby the support bases 21, 22 are driven by the X-axis feed motor 28.
The embroidery frame 19 is moved in the X-axis direction integrally with the above.

Between the motor mount 25 and the motor mount 26, there is provided a rotation transmission shaft 30 which is rotationally driven by a Y-axis feed motor 29 mounted on the motor mount 26. The rotation transmission shaft 30 is used for the support base 2
The wires 31, 31 suspended between the wires 1, 22 are driven, and the slide plate portion 19c is attached to an intermediate part of the wires 31, 31. With this,
By driving the Y-axis feed motor 29, the embroidery frame 19 is moved in the Y-axis direction. The work cloth set on the embroidery frame 19 is moved to an arbitrary position on the sewing machine table 14 by the horizontal movement mechanism 20 configured as described above.

The embroidery sewing machine configured as described above is controlled by the controller 32. As shown in FIG. 3, the control device 32 includes a CPU 33, a ROM
34, RAM 35, and bus 36 interconnecting them
The main component is a microcomputer including the above, and an input interface 37 and an output interface 38 are connected to the bus 36. The output interface 38 is connected to motor drive circuits 39, 40, 41 for driving the sewing machine motor 18, the X-axis feed motor 28, and the Y-axis feed motor 29, respectively.

Thus, the control device 32 controls the sewing machine motor 18 and the X-axis feed motor 2 based on the embroidery data described later.
8. The Y-axis feed motor 29 is controlled so that the needle bar 16 is moved up and down while the horizontal movement mechanism 20 moves the work cloth, whereby predetermined embroidery is automatically executed on the work cloth. Also, output interface 3
A display driving circuit 43 for driving the display device 42 is connected to the input device 8, and a keyboard 44, an external storage device 45 and an image scanner 46 are connected to the input interface 37.

The control device 32 has a function as an embroidery data creating device, and in the present embodiment, the needle position related data, that is, the block data necessary for the embroidery operation of the sewing machine body 11 is embodied as a graphic. Can be created based on division into several rectangular blocks surrounded by a pair of main side portions extending in the traveling direction and a pair of adjacent sub side portions. Further, in this embodiment, the control device 32 also has a function of developing one stitch of the block data to create embroidery data.

When creating the block data or the embroidery data, as will be described later, pattern data for defining the outline of the figure is required, and the external storage device 45 has a plurality of kana, alphabets, numbers, etc. in advance. The pattern data relating to the figure is stored, and the pattern data relating to the figure newly created by the operator using the image scanner 46 can be input to the control device 32, and further stored in the external storage device 45. You can also do it. In addition, the display device 42
A graphic or the like to be embroidered based on the pattern data is displayed on the screen.

As shown in FIG. 4, the RAM 35 has a pattern data memory 35a, a block data memory 35b, a thread density memory 35c, and an embroidery data memory 35.
d, a counter 35e and the like are provided together with the working area. Further, the ROM 34 stores programs for creating block data and embroidery data.

Here, the pattern data will be briefly described. This pattern data, for example, when the figure is a circle,
It is assumed that the coordinates of three points on the circumference and the data for instructing that the shape is a circle are included. Further, when the figure has an annular shape, the coordinates of three points on the outer circumference and one point on the inner circumference are included. It is supposed to include the coordinates and data indicating that it is a ring. In the case of other curved lines, the points and information defining the outer circumference and the inner circumference are included.

When the figure is a triangle or a quadrangle, the start point, the end point (feature point), and the fact that the contour line element is a straight line are indicated for each of the plurality of contour line elements that define the contour. Data and embroidery traveling direction data are included. At this time, if the figure is relatively complicated, as will be described later, the figure is divided into a plurality of rectangular blocks continuous in the embroidery advancing direction based on the pattern data of the figure, and Block data is created for each block.

This block data is, as shown in FIG. 7A, at each position (coordinate) of the four vertices of the block.
They are numbered 1, 2, 3, 4. As for this number, point 1 is the start of sewing, point 4 is the end of sewing, and the embroidery progresses so that line segment 1-3 and line segment 2-4 are alternately connected. It is set. Therefore, the line segment 1-3 and the line segment 2-4 become a pair of main side portions, and the line segment 1-2 and the line segment 3-4 that are adjacent to the pair are main side portions. In this case, the block may be a triangle, but at this time, as shown in FIG. 7B, by adding two numbers, for example, 3 and 4, to one apex, a quadrangle is similarly formed. I try to handle it.

To create embroidery data from such block data, so-called one-needle development work is performed. This is as shown in FIG.
4 is equally divided according to the thread density to obtain needle drop points, and embroidery data is set so that the needles drop alternately on the main side portions.

The control device 32 creates block data on the basis of the pattern data. At this time, a calculation means for calculating the length of the sub-edge portion of each block is provided by its software configuration. When the calculation result by the calculating means is less than the predetermined length, the function as the block changing means for changing the divided shape of the block including the corresponding sub-side part is realized. The function of each of these means will be clarified in the flowchart of block data creation shown in FIG.

Next, the operation of the above structure will be described with reference to a concrete example of the figure B as shown in FIG. This figure B
As shown in FIG. 5A, the contour is defined by connecting characteristic points from point 1 to point 14 by a straight line in order.
Further, the embroidery traveling direction is a direction from left to right as indicated by an arrow in the figure.

Now, assuming that such pattern data regarding the graphic B has already been created and stored in the external storage device 45, the operator operates the keyboard 44 to create the block data and specify the graphic B. Due to
Block data is created according to the flowchart of FIG.

That is, first, in step S1, the pattern data of the figure B is read from the external storage device 45 to the RAM 35, and in step S2, the number of closed regions is substituted into the variable N,
In the next step S3, the value of the counter C is set to 1. In the figure B, since the number of closed regions is 1, the value of N is 1.

In the next step S4, the C-th (first)
The block data of the closed region of is converted. This block data conversion is performed based on dividing the figure B into several quadrangles, and this division is shown in FIG.
The points 1 to 8 and the points 14 to 8 shown in FIG.
This is performed by a method of setting, for example, a sub-side portion extending from each feature point on the main side toward the opposing main side in a direction orthogonal to the embroidery traveling direction (arrow direction in the drawing).

As a result, the figure B is divided into several rectangular blocks as shown in FIG. 5 (b). Here, 1 to 24 are newly added to the vertices of each block as shown in the figure.
Will be numbered. Here, line segment 1-2, line segment 3-
4, ... Are numbered so that they are sub-sides of each block, and since the block at the right end is a triangle, two numbers 23 and 24 are assigned to one vertex. In step S5, the number of vertices (24) is set in the variable M.

In step S6, the value of the counter P is set to 1, and in the next step S7, the P-th vertex and (P +
1) The length of the sub-side portion connecting with the apex is calculated. Then, in step S8, it is determined whether or not the length of the sub-side is less than the predetermined length, in this case 1 mm. Here, if the length of the sub-side is 1 mm or more (N
o), step S15 without changing the sub-side
Proceed to.

On the other hand, if the length of the sub-side is less than 1 mm (Yes), the sub-side is set again to change the divided shape of the block. For that purpose, first, in step S9. Then, as shown in FIG. 6, the angles α, β, γ, δ formed by the sub-side portion and the four main side portions are calculated, and in step S10, the sum of the angles α and β is obtained. , The sum of the angles γ and δ is compared.

Here, the angle (α + β) is the angle (γ + δ)
If the size is above (Yes), as shown in FIG. 6A, in step S11, the main side portion P- (P-
2) Set a vertex having a length of 1 mm or more from the vertex (P + 1) on the top to create a new sub-edge portion (shown by a broken line),
Further, in step S12, the main side portion (P + 1)-(P +
3) An apex having a length of 1 mm or more from the apex P is set on the upper side, and this is also set as a new auxiliary side portion (shown by a broken line).

When the angle (α + β) is smaller than the angle (γ + δ) (No), as shown in FIG. 6B, in step S13, the main side portion (P + 1)-(P-
1) A new sub-side part is created by setting the vertices having a length of 1 mm or more from the vertices P (shown by a broken line), and further in step S14, on the main side part P- (P + 2). Apex (P
A vertex whose length from +1) is 1 mm or more is set and this is also set as a new sub-side portion (indicated by a broken line). In addition, in these steps S11 to S14, when the sub-side portion having a length of 1 mm or more cannot be created, the apex is set to be closest to 1 mm.

Thus, in a region where the distance between the main sides is narrow, the divided shape of the block is close to a rectangle, and the sub-sides are parallel to each other with respect to the embroidery advancing direction. It is changed to a shape close to a quadrangle or a trapezoid (triangle).

Thereafter, the value of the counter P is incremented by 2 (step S15), and if the value of the counter P is M or less (No in step S16), step S7.
Repeat the work from. Further, when the above-mentioned work for one closed region is completed (Yes in step S16),
The value of the counter C is incremented by 1 (step S17), and the work from step S4 for the next closed region is repeated. When the blocking for all closed regions is completed (Yes in step S18), the work ends.

As a result, in the figure B of FIG. 5, the divided shapes of the blocks are changed as shown in FIGS. 5B to 5C, so that the sub-edges of all blocks are changed. The length is set to a predetermined length (1 mm) or more. When the embroidery operation is executed using this block data, the work cloth is embroidered as shown in FIG. Here, in the portion where the space between the main sides is narrow, the extending direction of the stitch is inclined (rightward) with respect to the embroidery traveling direction (rightward).
Since it is in the direction, it is possible to secure a certain stitch length close to at least 1 mm.

As described above, according to the present embodiment, when the embroidery of the predetermined figure B is executed, unlike the conventional art in which only the stitches extending in the substantially orthogonal direction between the main side portions can be formed, A stitch extending in a direction inclined with respect to the embroidery advancing direction is formed in a portion where the distance between the main sides is narrow. Therefore, a stitch length of a certain length can always be ensured, and a beautiful embroidery can be executed without the stitch forming a dumpling shape.

In the above embodiment, when the sub-side portion is changed, new apexes are individually obtained so that the sub-side portion becomes 1 mm or more. However, for example, with respect to the embroidery advancing direction or the main side portion. The inclination angle may be fixedly set, and the sub-side portion of 1 mm or less may be changed to the inclination angle. In this case, an advantage that the calculation amount is reduced can be obtained. . Also, the inclination angle may be changed stepwise depending on the length of the sub-side portion.

Further, in the above embodiment, the block data in which the main side portion is a straight line has been described, but the block division shape may be similarly changed for a block in which the main side portion is a curved line. If so, the same effect can be obtained.

Next, a second embodiment of the present invention will be described mainly with reference to FIGS. 8 and 9. This second embodiment corresponds to claim 2. In this embodiment, since the external structure of the embroidery sewing machine and the control device is the same as that of the first embodiment, new illustration and detailed description thereof are omitted, and only different points will be described below.

The control device according to the present embodiment also has a function as an embroidery data creation device. In this embodiment, however, the control device creates embroidery data from pattern data without using block data. It is supposed to do.
At this time, by the software configuration thereof, needle drop point setting means for arranging needle drop points alternately on a pair of opposing main sides extending in the embroidery advancing direction and forming a contour of the figure, and the needle drop point setting means. The stitch length calculation means for calculating the stitch length from one needle drop point to the next needle drop point in the needle drop point set by, and when the calculation result by this stitch length calculation means is less than the predetermined stitch length, The function as a needle drop point changing means for changing the needle drop point to another position on the corresponding main side portion is realized. The function of each of these means will be clarified in the flowchart for creating embroidery data shown in FIG.

Here, the figure A as shown in FIG. 9 will be described as a specific example. As shown in FIG. 9A, the figure A has three vertices numbered as points 1 to 3 and its contour is defined by a curve 1-3, a curve 2-3, and a straight line 1-2. . In this case, the point 1 is the starting point and the point 3 is the ending point, and the embroidery traveling direction is as shown by the arrow in the figure. Therefore, the curve 1-3 and the curve 2-3 are a pair of main side portions facing each other,
By alternately arranging the needle drop points on these main side portions, the work cloth is embroidered so that the figure A is filled with the stitches alternately connecting the both main side portions. .

When the operator operates the keyboard 44 to specify the creation of the embroidery data of the figure A, the control device creates the embroidery data according to the flowchart of FIG.

That is, first, in step S21, the graphic A
Pattern data is read from the external storage device 45 to the RAM 35, the number of closed regions is substituted into the variable N in step S22, and the value of the counter C is set to 1 in the next step S23. In the figure A, since the number of closed regions is 1, the value of N is 1.

In the next steps S24 to S28, the embroidery data of the Cth (first) closed area is created. Here, a needle drop point for one stitch is set on the main side portion in order from the starting point (step S24), and then the stitch length (distance from the needle drop point to the next needle drop point) is calculated (step S24). S25). Then, it is judged whether or not the stitch length is less than a predetermined stitch length (for example, 1 mm) (step S26), and when it is less than the stitch length, the needle drop point is changed so that the stitch length becomes 1 mm or more (step S2).
7). The above operation is repeated until the needle drop point is set on the entire main side (No in step S28), and thus C
The embroidery data of the second (first) closed area is created.

In the example of FIG. 9, first, as shown in FIG. 9 (b), one main side portion 2-3 is equally divided into a predetermined number of divisions according to the yarn density, and the main side portion is divided. The needle drop point on 2-3 is determined, and the standard pitch is obtained by dividing the entire length of the other main side portion 1-3 by the division number. Thus, the needle drop point next to the vertex 1 is set to the point a, and the needle drop point next to the point a is set to the point b on the main side portion 1-3, which is separated from the vertex 1 by the standard pitch. (Step S24).
The distance between the point a and the point b becomes the stitch length, this length is calculated (step S25), and it is judged whether or not it is less than 1 mm (step S26). In this case, if it is 1 mm or more, the point b is determined.

The needle drop point next to the point b is the point c on the main side portion 2-3, and the needle drop point next to the point c is separated from the point b on the main side portion 1-3 by a standard pitch. The same calculation and determination of the stitch length as described above are repeated, such as the point d is set.

Then, as shown in FIG. 9C, when the needle drop point next to the point s is set to the point t which is apart from the point r by the standard pitch, the stitch length from the point s to the point t is 1 mm. When it becomes less than (Yes in step S26), in the next step S27, as shown in FIG. 9D, the needle drop point next to the point s is separated from the point r by the standard pitch. The stitch length is 1m so that it is shifted toward the point r from the point
Reset the needle drop point t to m or more. Continuing with Figure 9
As shown in (d), the needle drop point v next to the point u is also changed so as to be displaced to the side opposite to the embroidery advancing direction.

When the needle drop point is set up to the vertex 3 (No in step S28), the creation of the embroidery data of the Cth (first) closed area is completed, and the counter C is incremented in the next step S29. The same embroidery data is created for the next closed area, and when the embroidery data for all closed areas is created (Y in step S30).
es), the work of creating embroidery data is completed.

When the embroidery operation is executed in accordance with the embroidery data created in this way, the work cloth is shown in FIG.
The figure A is embroidered by the stitch as shown in FIG. Here, in the portion where the interval between the main side portions is narrow, the extending direction of the stitch is a direction inclined with respect to the embroidery advancing direction, and all the stitches are embroidered while ensuring a length of 1 mm or more. Like

Also in this embodiment, when the embroidery of the predetermined figure A is executed, the stitches of the embroidery made by the created embroidery data as in the prior art are arranged between the main sides in the embroidery advancing direction. Unlike that formed by extending at an angle close to a right angle with respect to the stitch, a stitch extending in a direction inclined with respect to the embroidery advancing direction is formed in a portion where the interval between the main sides of the figure is narrowed. It

Therefore, a stitch length of a predetermined length or more can always be ensured, and as in the case of the first embodiment described above, beautiful embroidery can be performed without the stitch forming a dumpling. .

In the above embodiment, the needle drop points on one of the main sides are fixedly set and the needle drop points on the other main side are changed. In, the needle drop point may be shifted in the opposite direction so that the stitch length becomes longer. Also in this embodiment, when changing the needle drop point, the needle drop point at which the stitch length is 1 mm or more is individually obtained. However, for example, the needle drop point is inclined at a predetermined angle with respect to the embroidery advancing direction. Even if the needle drop point is obtained so as to form a stitch, almost the same effect can be obtained.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

[0065]

As is apparent from the above description, according to the present invention, the following excellent effects can be obtained.

That is, according to the embroidery data creation apparatus of the sewing machine of the first aspect, the divided shape of the block is inclined with respect to the embroidery advancing direction in the portion where the interval between the main sides of the figure becomes narrow. It can be changed to one capable of forming a stitch extending in the direction. Therefore, it is possible to create needle position related data that can secure a stitch length of a certain length even in a portion where the distance between the main sides of the figure becomes narrow, and as a result, beautiful embroidery can be performed. Is what you can do.

According to the sewing machine embroidery data creation device of the second aspect, if the stitch length at the set needle drop point is less than the predetermined length, the needle drop point can be secured so that the stitch length of the predetermined length can be secured. Can be changed. Therefore,
Embroidery data that can secure a stitch length of a predetermined length can be created even in a portion where the distance between the main sides of a figure is narrow, and as a result, beautiful embroidery can be executed. Is.

[Brief description of drawings]

FIG. 1 is a flowchart of block data creation showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing the appearance of a sewing machine.

FIG. 3 is a block diagram showing an electrical configuration.

FIG. 4 is a diagram showing a configuration of RAM.

FIG. 5 is a diagram for explaining a procedure for creating block data.

FIG. 6 is a diagram for explaining a method of changing a sub-edge portion.

FIG. 7 is a diagram for explaining a method of deploying one needle of a block.

FIG. 8 is a flowchart for creating embroidery data showing a second embodiment of the present invention.

FIG. 9 is a diagram for explaining a procedure for creating embroidery data.

FIG. 10 is a view for explaining a procedure for creating embroidery data showing a conventional example.

FIG. 11 is a diagram for explaining a procedure for creating block data showing another conventional example.

[Explanation of symbols]

In the drawing, 11 is a sewing machine main body, 15 is a sewing needle, 16 is a needle bar,
Reference numeral 19 is an embroidery frame, 20 is a horizontal movement mechanism, 32 is a control device (embroidery data creation device), 33 is a CPU, and 34 is RO.
M, 35 are RAMs, 37 is an input interface, 38
Is an output interface, 42 is a display device, 44 is a keyboard, 45 is an external storage device, 46 is an image scanner, and A and B are figures.

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-3-136689 (JP, A) JP-A-63-206277 (JP, A) JP-A-3-141976 (JP, A) JP-A-2- 139470 (JP, A) JP 3-136690 (P, A) JP 3-140187 (JP, A) JP 63-212394 (JP, A) JP 63-139588 (JP, A) JP-A-62-292188 (JP, A) JP-A-3-862 (JP, A)

Claims (2)

[Claims] 1. A needle position-related data required for a sewing machine for embroidering a predetermined figure on a work cloth, a pair of main side portions extending in the advancing direction of the figure and a pair of sub sides adjacent to the main side portion. And a calculation means for calculating the length of the sub-side portion of each block, and a calculation result by the calculation means is predetermined. And a block changing means for changing the divided shape of the block including the corresponding sub-side portion when the length is less than the length. 2. A method for creating embroidery data for designating each needle drop point in a sewing machine for embroidering a predetermined figure on a work cloth, wherein a pair of a pair of stitches forming the contour of the figure and extending in the embroidery advancing direction is formed. Needle drop point setting means for alternately arranging needle drop points on opposite main sides and a stitch from one needle drop point to the next needle drop point at the needle drop point set by this needle drop point setting means Stitch length calculating means for calculating the length, and needle drop point changing means for changing the needle drop point to another position on the corresponding main side when the result of calculation by the stitch length calculating means is less than a predetermined stitch length. An embroidery data creation device for a sewing machine, comprising: