JPH04158889A - Data processor for embroidering-machine - Google Patents

Abstract

PURPOSE:To avoid the occurrence of the situation in which a peculiar trapezoidal block, of which the side intersects with the side of another trapezoidal block, is not changed to a normal trapezoidal brock because the peculiar trapezoidal block is at the end of a row of the trapezoidal blocks, by including a means whereby the peculiar trapezoidal block positioned at the one end of a row of a plurality of the trapezoidal blocks is independently changed to the normal trapezoidal block. CONSTITUTION:Data indicating a plurality of trapezoidal blocks to be filled up with zigzag stitch embroidery are stored in a trapezoidal block data-storing means 1, and the trapezoidal black positioned at least at one end of a row of these trapezoidal blocks is a peculiar trapezoidal block, of which the side intersects with the side of another trapezoidal block. In this case, the peculiar trapezoidal block is independently changed to a normal trapezoidal block by a changing means 2. In the case in which the peculiar trapezoidal block held between two adjoining trapezoidal blocks is changed to a normal trapezoidal block, it is essential to one side established after its change holds two normal trapezoidal blocks in common, and the restriction in the time of its change is strong. On the other hand, when the peculiar trapezoidal block at the end of a row of the trapezoidal blocks is changed, the most end side belongs to one trapezoidal block only, and hence the restriction in the time of its change is weak.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a data processing device for an embroidery sewing machine, and particularly to a data processing device for embroidery sewing machines. The present invention relates to an apparatus for processing embroidery data for embroidering characters and figures by embroidering characters and figures.

Conventional Techniques It is already known that letters and figures can be embroidered by staggered stitching at a constant width along shape defining lines.

The applicant first developed a data creation device that automatically creates embroidery data for performing zigzag embroidery, and filed a patent application.

This is the case currently being filed as Japanese Patent Application No. 1-276700.

This device stores point sequence data representing each bending point of the polygonal line when the shape defining line is a polygonal line, and each polygonal point when the shape defining line is approximated by a polygonal line when the shape defining line is a curved line. This device creates embroidery data from zigzag stitch width data representing the width of zigzag stitches to be performed along a specified line.

The band-shaped embroidery area to be filled with zigzag stitching is divided into a plurality of trapezoidal blocks to create embroidery data. Specifically, each line segment (referred to as a shape-defining line segment) connecting two adjacent bend points on the shape-defining line is divided into multiple trapezoidal blocks. imaginary first and second imaginary lines that are parallel to , and whose distance from each other is equal to the zigzag stitch width represented by the zigzag stitch width data, and between the two imaginary lines that are located on one side of the shape defining line. The intersection points are determined, and embroidery data is created using a trapezoidal block determined by a total of four intersection points, two corresponding to both ends of each line segment of the shape defining line, as one embroidery block. To actually perform embroidery, needle position data, that is, data representing the position where the sewing needle penetrates the workpiece cloth, is required, but the embroidery data creation device creates trapezoidal block data representing the trapezoidal block described above as embroidery data. It is also possible to create the needle position data in the embroidery machine in parallel with the execution of embroidery.

By dividing the band-shaped embroidery area into a plurality of trapezoidal blocks in this manner and filling each of the trapezoidal blocks with zigzag stitches, embroidery data can be automatically created.

However, it has been found that this developed device has a problem in that when the distance between two adjacent bending points is small compared to the size of the zigzag stitch width, the stitches overlap thickly and beautiful embroidery cannot be obtained. did. As shown in Figure 2, when the distance between two adjacent bending points is large relative to the zigzag stitch width, the trapezoidal block ABCD takes on a normal trapezoid whose legs do not intersect with each other. By filling in the space between the two bottoms with zigzag stitches, beautiful embroidery can be obtained where the threads are thick and do not overlap, but as shown in Figure 3, when the distance between two adjacent bending points is small compared to the width of the zigzag stitches, In this case, the two legs of the trapezoidal block ABCD intersect to form a special leg-crossing trapezoidal block in the shape of two triangles connected at their vertices, and if you want to fill in the space between the two bottoms with a zigzag stitch, As is clear from the figure, the threads overlap thickly and beautiful embroidery cannot be obtained.

Therefore, in Japanese Patent Application No. 2-120877, the present applicant proposed a data processing device for converting a leg-crossing trapezoid block row consisting of one or more leg-crossing trapezoid blocks into a normal trapezoid block.

This proposed device is configured to include first trapezoidal block changing means and second trapezoidal block changing means.

The first trapezoidal block changing means changes a trapezoidal block row consisting of one or more leg-crossing trapezoidal block rows and two normal trapezoidal blocks adjacent to each other on both sides of the trapezoidal block row so that the first virtual lines of the two adjacent normal trapezoidal blocks A line segment connecting the intersection point of and the intersection point of the second virtual lines is each regarded as one leg,
The legs of two adjacent normal trapezoidal blocks are changed to two normal trapezoidal blocks having the legs on the opposite side of the row of crossed trapezoidal blocks as the other leg.

On the other hand, the second trapezoidal block changing means changes a trapezoidal block row consisting of one or more leg-crossing trapezoidal block rows and two adjacent joined blocks adjacent to each other on both sides of the trapezoidal block row to one of the two adjacent joined blocks. An intersection between the first virtual line of the trapezoidal block and the second virtual line of the other trapezoidal block, and an intersection between the second virtual line of the one trapezoidal block and the first virtual line of the other trapezoidal block. The line segment connecting
This is changed to two normal trapezoidal blocks, each having one leg and the other leg being the leg on the opposite side of the leg-crossing trapezoidal block row of two adjacent combined blocks.

For example, according to the first trapezoidal block changing means, a trapezoidal block row consisting of two leg-crossing trapezoidal blocks shown in FIG. Changed to trapezoidal blocks 4 and 5,
According to the second trapezoidal block changing means, the two normal trapezoidal blocks 6.7 shown in FIG. 6 are changed.

In addition, in the first trapezoidal block changing means, the two trapezoidal blocks adjacent on both sides of the leg-crossing trapezoidal block are limited to normal trapezoidal blocks. Adjacent trapezoidal blocks are 2
If there are not two normal trapezoidal blocks, the leg-crossing trapezoidal block will remain even after the change, so the adjacent trapezoidal blocks must be two normal trapezoidal blocks.

However, in the second trapezoidal block changing means, one of the two trapezoidal blocks adjacent on both sides of the leg-crossing trapezoidal block may be a leg-crossing trapezoidal bronc depending on the shape of the shape defining line of the trapezoidal block row to be changed. However, both may be crossed-legged trapezoidal blocks.

According to this device, a zigzag stitch area including a leg-crossing trapezoid block is changed to a zigzag stitch area not including a leg-crossing trapezoid block, and beautiful zigzag stitch embroidery can be obtained.

Problems to be Solved by the Invention However, the proposed device described above is based on the premise that a trapezoidal block row consisting of a leg-crossing trapezoidal block row and two adjacent joined blocks adjacent thereto is changed into two normal trapezoidal blocks. Therefore, as shown in FIG. 7, when one leg-crossing trapezoidal block is at the end of a trapezoidal block row, that leg-crossing trapezoidal block cannot be changed to a normal trapezoidal bronc.

Even in this case, by applying the same rules as the second trapezoidal block changing means to one leg-crossing trapezoidal block and the trapezoidal bronc adjacent to one side thereof, it may be possible to change the block to a normal trapezoidal block. For example, a trapezoidal block row consisting of a leg-crossing trapezoidal block shown in FIG. 7(a) and one normal trapezoidal block adjacent thereto is shown in FIG. 7(b).
Two normal trapezoidal blocks EFGH and GHI are shown as solid lines in
It can be changed to J. However, it is not always possible to change to a normal trapezoidal block. When the second trapezoidal block changing means is applied as described above to the trapezoidal block row consisting of the leg-crossing trapezoidal block and one normal trapezoidal block adjacent thereto shown in FIG. 8(a), the result shown in FIG. 8(b) is The trapezoidal blocks KLMN and MNTS shown by solid lines are changed, and a new leg-crossing trapezoidal block KLMN is created.

The present invention has thus been made with the object of providing a data processing device that can avoid the situation where a leg-crossing trapezoidal block cannot be changed to a normal trapezoidal block because it is located at the end of a trapezoidal block row. .

Means for Solving the Problem In order to solve this problem, the data processing device according to the present invention, as shown in FIG. A first imaginary line and a second imaginary line are imaginary that are parallel to each of the line segments connecting two points adjacent to each other among the series of points on the shape defining line that define In this case, a trapezoidal block data storage means 1 stores data of a trapezoidal block whose four vertices are defined by two intersections between mutually adjacent first virtual lines and two intersections between mutually adjacent second virtual lines. and, et al.) A leg-crossing trapezoidal block whose legs located at at least one end intersect with each other in a trapezoidal block row consisting of a plurality of trapezoidal blocks represented by the data stored in the trapezoidal block data storage means is defined as the leg-crossing trapezoid block. Trapezoidal block changing means 2 for changing a block alone into a normal trapezoidal block.

Function: In the data processing device according to the present invention, data representing a plurality of trapezoidal blocks to be filled with zigzag embroidery is
The data is stored in the trapezoidal block data storage means 1, and when a trapezoidal block located at at least one end of a trapezoidal block row consisting of a plurality of trapezoidal blocks is a leg-crossing trapezoid block, the changing means 2 changes the leg-crossing trapezoidal block. Change a trapezoidal block to a normal trapezoidal block.

When changing the trapezoidal block for a leg-crossing trapezoidal block sandwiched between two adjacent joint blocks, it is essential that one leg set after the change is shared by the two normal trapezoidal blocks. , there are strong constraints when changing, but when changing a leg-crossing trapezoid block at the end of a trapezoidal block row, the constraints when changing are weak because the first leg belongs to only one trapezoidal block, and it cannot be changed alone. It can be done.

Effects of the Invention As described above, according to the present invention, when a leg-crossing trapezoidal block exists at at least one end of a trapezoidal block row consisting of a plurality of trapezoidal blocks defining a zigzag stitch embroidery area, the leg-crossing trapezoidal block is It is now possible to change to a normal trapezoidal block by itself, and beautiful embroidery can be obtained without leaving leg-crossing trapezoidal broncs after the change.

In addition, since there are weak constraints when making changes, it is easy to make changes so that the embroidery area made up of changed trapezoidal blocks is close to the shape of the shape defining line, and it is possible to obtain embroidery as planned. I can do it.

EXAMPLE Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 9 is a perspective view of an automatic sewing machine that performs embroidery based on embroidery data created by the data creation device according to the present invention. A sewing machine arm 12 is arranged on a table 10,
A needle bar support case 14 is attached to the front end of the needle bar support case 14 so as to be movable in the left-right direction. The needle bar support case 14 supports five needle bars 16 so as to be movable up and down, and a needle 18 is attached to the lower end of each needle bar 16. Each needle 1822 is supplied with different types of thread from a thread supply source (not shown) via a thread tension device 20 and thread take-up 22 on the needle bar support case 14. The needle bar support case 14 is driven and moved by a needle selection motor 24 attached to the sewing machine arm 12, and positions one of the five needle bars 16 and needles 18 at a use position.

The needle bar I6 positioned at the use position is connected to the sewing machine motor 26 via a power transmission mechanism (not shown)! tied up and moved up and down. A sewing machine head 28 protrudes from the sewing machine table 10 at a position opposite to the needle bar 16 in the use position, and the sewing machine head 28 works with the needle 8 to attach the workpiece cloth W.
A thread loop catcher (not shown) is provided for forming a stitch in the thread.

There are two X-direction moving frames 3 on both sides of the sewing machine table 10.
0 (only one of which is shown in FIG. 9) is provided to be movable in the direction of arrow Y, and can be moved an arbitrary distance in both forward and reverse directions by a Y-axis drive motor (not shown). A support frame 32 is stretched between both Y-direction moving frames 30, and an X-direction moving frame 34 is supported by the support frame 32 so as to be movable in the direction of arrow X. It can be moved any distance in both forward and reverse directions.

A work cloth holding frame 36 that removably holds the work cloth W is attached to the X direction moving frame 34, and the work cloth holding frame 36 can be moved to any position on the XY plane. . As described above, the X-direction moving frame 30°, the Y-axis drive motor, the X-direction moving frame 34. The x-axis drive motor, the work cloth holding frame 36, and the like constitute a work cloth feeding device 38.

The control section of this automatic sewing machine is shown in FIG. This control unit is the CPU 40. ROM42. The computer is mainly equipped with a RAM 44, and the CPU 40 has an input/output board 46. The needle selection motor 24. A sewing machine motor 26 and a workpiece cloth feeding device 38 are connected. The CPU 40 also has a magnetic disk.

An external storage device 54 for recording data on a magnetic tape or the like is connected, and an input device 58 is connected via an input control circuit 56, and a display device 62 is connected via a display control circuit 60.
are connected to each other.

The input device 58 is used by the operator to input operations such as creating zigzag stitch data, instructing the start of embroidery, and selecting point sequence data on the shape defining line that defines zigzag stitching, and uses a keyboard, mouse, etc. Contains Bointing Deheis. The display device 62 is a means for displaying data of a series of dots on a shape regulation line that defines a zigzag stitch, data of a created trapezoidal block for a zigzag stitch, etc., so that the operator can visually see the data, and the display device 62 is constructed of a cathode ray tube or the like. be done.

As shown in FIG. 11, the RAM 44 is provided with storage areas for various data, including a point sequence data area 64 for storing point sequence data, as well as a working area. The ROM 42 also stores an embroidery data creation program shown in the flowcharts of FIGS. 12 to 16, as well as various programs for controlling the operation of the sewing machine.

Hereinafter, creation of embroidery data will be explained with reference to each flowchart.

When creating embroidery data, first step Sl (
Hereinafter, it will be simply expressed as Sl. (Same for other steps)
, the point sequence data is read from the external storage device 54 and stored in the point sequence data area 64 of the RAM 44, and the number N of points is counted and stored in the point number area 66. The point sequence data is input by the operator through the input device 58 and stored in the external storage device 54.

Subsequently, in S2, zigzag stitch width data, stitch density data, and creation format designation data for zigzag stitch data are read from the external storage device 54, and are respectively stored in the zigzag stitch width area 68. It is stored in the stitch density area 70 and data format area 84. The zigzag stitch width etc. are displayed on the display device 62 based on this stored data, and if the operator wishes to change them, the zigzag stitch width can be changed by inputting other data from the input device 58. Eri 76
8 etc. data will be changed. The stitch density data is the median line of each trapezoidal block (the line segment connecting the midpoints of the two legs)
This indicates the number of stitches to be formed per unit length of the embroidery data, and the data format specification data determines whether the embroidery data can remain as trapezoidal block data or in single stitch data format representing the actual needle drop position. This is data that specifies whether it should be created.

S3 based on the above point sequence data and zigzag stitch width data
In step S4, a process of setting a zigzag stitch area is performed, and in S4, zigzag stitch data for performing zigzag stitch embroidery in that area is created, and in S5, the zigzag stitch data is stored in the external storage device 54.

The zigzag stitch area setting process in S3 is comprised of the steps shown in FIG.

First, in 5101, the point sequence number j is set to 1, and 51
Data is read from the point sequence data area 64 at step 02. In 5103, points P, which are mutually adjacent bending points,
A line segment connecting P and 41! , is created. The shape defining line has a plurality of bending points, that is, points P, . . . It is a broken line defined by y, and the point sequence data is points P, to P,.

This is data representing each X and Y coordinate value of 1. Here, since the point sequence number j is 1, as shown in FIG. 17, a line segment is created by connecting the adjacent points P and P2 on the shape defining line! , is created.

Next, at 5104, as shown in FIG.
Two virtual lines uj and d separated by /2 are created. Here, the point sequence number J is 1, so the line segment!
, parallel to the two virtual 'MA u +
and dl are created.

In step 5105, since the point sequence number j=1, the determination is YES and step 5111 is executed. 5111
As shown in FIG. 18, is the step of finding the intersection point on the imaginary line at the end of the shape defining line indicated by the point sequence number j=1, and the line passing through point P and perpendicular to line segment 11 and virtual line u
The intersection with l + d l is assumed to be intersection 0+, Q+. In 5110, the point sequence number j is incremented, and the program execution returns to 5102.

Steps 5102 to 5104 are executed in the same manner as above to obtain the line segment 12 and virtual lines uz and ctz.

In 5105, the point sequence number j=2, so
It is determined as No. In 5106, the adjacent virtual line u1
An intersection point 02 between and u2 and an intersection point Q2 between the adjacent virtual line d and d2 are determined. In 5107, since the point sequence number j is not equal to N+1, the determination is No. 5108
, the intersections o, −+ , Qj−, , Oi , Q,
A trapezoidal block ti-+ (abbreviated as trapezoid in the flowchart) defined by is created.

Here, since the point sequence number j = 2, the intersection OI
, Ql.

0□, a trapezoidal block t defined by Q2.

is created. The data of the created trapezoid block and the trapezoid number 1 are stored in the trapezoid block data area 72 and the trapezoid number area 74 at 8109, respectively. For convenience, the line segment connecting the intersection O4 and Oj + 1 will be referred to as a first virtual line segment, and the line segment connecting the intersection Qj and Q4,1 will be referred to as a second virtual line segment.

Next, in 5110, the value of point sequence number j is incremented, and the program execution returns to 5102.

Thereafter, the value of point sequence number j is sequentially incremented in the same way, and steps 5102 to 5ilo are repeatedly executed.

When the point sequence number j becomes N+1, the determination in 5107 is YES.
Therefore, 3112 and subsequent steps are executed. 5112 is the first
This step is to find the intersection point on the virtual line of the end indicated by the point sequence number j=N+1 on the shape defining line shown in Figure 7. Since N+2 does not exist in the point sequence number j, the normal method is to find the intersection point %1.
, QH,l cannot be determined, and the intersection 08°l + QN+l is set according to another rule. That is, the intersection point between the line passing through P8°1 and perpendicular to the line segment IN and the virtual lines u, d is the intersection ON++ + Qs+1. At 3113, the intersections ON, QN, ON
, 1. A trapezoidal block 1N defined by QN-+ is created, and in 5114, the created trapezoidal block 0
NQNOゎ1 QH*1 and the trapezoid number N are stored in predetermined locations in the trapezoid program data area 72 and the trapezoid number area 74.

The trapezoidal block created as described above is generally a normal trapezoidal block (normal trapezoidal block), but
Adjacent corner points where the distance between the shape defining lines is relatively small, for example, the 18th point p, .

The trapezoidal block 1=-+ defined by P has two legs, namely the line segment Oj -I Q j -1 and the line segment 0.
QJ becomes a leg-crossing trapezoidal block that intersects each other.

In addition, the trapezoidal block 2 defined by the points PM, PN, on the shape defining line is also
When ,l,QN,+ is determined, it may become a leg-crossing trapezoidal bronc in which two legs, ie, line segment 0HQ11 and line segment 0, , Q, , intersect with each other.

After the change in 5114, a search process for a leg-crossing trapezoid block is performed in 5115, and it is determined in S16 whether or not there is a leg-crossing trapezoid block, and if so, in 5117, the leg-crossing trapezoid block is converted into a normal trapezoid block. Processing to change is performed. If not, 5117 is skipped.

The leg-crossing trapezoidal block search process in step 5115 is performed by executing the steps shown in FIG.

First, in 5201, the number j of the trapezoidal block.

The number S of the first one in the leg-crossing trapezoid block row (abbreviated as the start number) 5, and the number e of the last one (abbreviated as the end number), ! II The number m of intersecting trapezoidal block columns is initialized. Trapezoidal block number j is 1, other s
, e and m are all set to zero. followed by 5
At 202, data for the j-th trapezoidal block, t, is retrieved, and at 5203, it is determined whether the legs of the trapezoidal block intersect.

If the legs intersect, it is determined in 5204 whether the start number S is O or not, and if it is 0, the trapezoid block currently taken out is the first one in a leg-crossing trapezoid block row. Therefore, in 5205, the number m of leg-crossing trapezoidal block rows is increased by 1, and 5
At 206, the trapezoidal block number j is set as the start number S. On the other hand, if the legs do not cross, 52
The determination result of 03 is NO, and it is determined in 5207 whether or not the start number S is O, and if O, 52
08 to 5210 are skipped, but if it is not 0, the currently extracted trapezoid block is a normal trapezoid block following the last leg-crossing trapezoid block of one leg-crossing trapezoid bronc row, so in 8208 The trapezoidal block number j-1 is set as the end number e, and 52
At step 09, the start number S and end number e are stored as a pair in the leg-crossing trapezoidal block row data area 7th of the RAM 44, and at step 5210, the start number S and end number e are initialized.

These values are returned to zero.

After executing 5206 or 5210, it is determined in 3211 whether there is the next trapezoidal block in the trapezoidal block data area 74, and if so, the trapezoidal block number j is incremented in 5212, and then the next trapezoidal block is incremented in 5212.
2 and subsequent steps are executed.

By repeating this execution, a leg-crossing trapezoid block row in which one or more leg-crossing trapezoid blocks are consecutive is searched, and the first trapezoid plot number of each leg-crossing trapezoid block row is used as the start number S, and the last leg-crossing trapezoid block row is used as the start number S. The numbers of the trapezoid blocks are sequentially stored in pairs in the leg-crossing trapezoid block row data area 76 as end numbers e.

Then, all the trapezoidal blocks are taken out and 5211
If the determination result is No, it is determined in 5213 whether the start number S is O or not, and if it is 0, the crossed leg trapezoid search process ends;
In step 5215, the trapezoid block number j is set to the end number e, and in step 5215, the start number and end number e are stored in the leg-crossing trapezoid block string data area 76, and the leg-crossing trapezoid search process ends. 5214 and 5215
is a necessary step when one embroidery area ends with a row of leg-crossing trapezoidal blocks.

The leg-crossing trapezoidal block changing process in step 5117 is performed by executing the process shown in FIG. 15 to change the trapezoidal block rows illustrated in FIGS. 19 and 24 to FIGS. 21, 23, and 25, respectively.

This is the process of changing to the normal trapezoidal block shown in FIG.

First, in 5301, the first leg-crossing trapezoidal block string in the leg-crossing trapezoidal block string data area 76 is read out. Here, it is assumed that one leg-crossing trapezoidal block t, (also te) shown on the left side of FIG. 19 has been read out.

In 5302, it is determined whether the values of the start number S and end number e of the first leg-crossing trapezoidal block row are both 1.

The determination in 5302 is YES when the trapezoid block located at the end of the trapezoidal block row is a leg-crossing trapezoid block, and the leg-crossing trapezoid block is changed to a normal trapezoid block by executing 3314 and subsequent steps of the program. Ru. However, here the determination is NO. Next, in 8303, it is checked whether the values of the start number S and the end number e are both N, but the determination is also NO, and 330
4 or less are executed.

At 5304, trapezoidal block t,-1 and trapezoidal block t,. An extension line of the shape defining line segment 1 is obtained. 53
05, the intersection angle α of the two extension lines is calculated.

Then, at 53o6, it is determined whether the intersection angle α is equal to or larger than the set angle β (for example, 9o°). Second
As shown in Figure 0, when the intersection angle α is equal to or greater than the set angle β, in 5309, the intersection O d0
The intersection point Q s e of °1 is found. And 531
0, one leg-crossing trapezoidal block 5 shown in FIG. 20 and normal trapezoidal blocks 5-1 adjacent to both sides thereof.
and tl, 1 are the trapezoidal block Os-I Q s-10so Q sm and the trapezoidal block 0. .

Q s a 011 +l I Q @ + 1 and 2
Changed to two normal trapezoidal blocks.

After execution of steps 5309 and 5310, in 5311, the two changed normal trapezoidal block data are changed to one leg-crossing trapezoidal block t6 in the trapezoidal block data area 72 and two normal trapezoidal blocks ti-1 and t adjacent to both sides thereof.
, +, and is stored in the storage area where the data was stored. However, the number of trapezoidal blocks that were three before the change is reduced to two after the change, resulting in one extra storage area. Therefore, the normal trapezoidal blocks Os-M-+03゜Q s e and O,, Q,, O□1 Q 414 + stop data after the change are the normal trapezoidal blocks ts-+ and L, respectively.
o. 1 is stored in the storage area where the leg-crossing trapezoid block t5 was stored, and data indicating that there is no data is stored in the storage area where the leg-crossing trapezoid block t5 was stored.

In 5312, it is determined whether there is no leg-crossing trapezoidal block row to be read next. In this case, since there is one, the determination is No. In 5313, the next leg-crossing trapezoidal block row is determined as shown on the right side of FIG. Two crossed leg trapezoidal blocks1. ,1. Suppose that a leg-crossing trapezoidal block sequence consisting of is read out.

In this case, steps 5303 to 3305 are executed in the same manner as above, and it is determined in 3306 that the intersection angle α is smaller than the set angle β. 3307, virtual mug-1
and virtual line d,. The intersection point 0□ with 1 and the intersection Q□ between the virtual line dS-+ and the virtual line U□ are determined, and in 3308, the trapezoidal block is changed. That is, the 22nd
The figure shows a leg-crossing trapezoidal block row consisting of two leg-crossing trapezoidal broncs L,, t, and two normal trapezoidal blocks ti-+ adjacent on both sides (this normal trapezoidal block is a normal trapezoidal block after being modified by the above processing). The blocks O,,Q,,0゜+l Q@*1), Lm-+ are two normal trapezoidal blocks OS-I Q S-10f shown in FIG.
il Q MP and Q,,O,. 01゜2Q0゜2. Next, in 5311, the modified normal trapezoidal block is stored in the trapezoidal block data area 72.

In this way, steps 5301 to 5313 are repeatedly executed, and if there is no leg-crossing trapezoidal block row to be read next, the determination result at 5312 becomes YES, and the process of changing the leg-crossing trapezoidal block row of one embroidery area is performed. finish.

On the other hand, in 5301, if the leg-crossing trapezoidal block js Do on the left shown in FIG. Number S
and end number e are both 1, so it is determined as YES,
3314 and subsequent steps are executed.

First, in 5314, the value of the point sequence number (hereinafter abbreviated as the intersection number) i of the intersection on the virtual line defining the trapezoidal block is set to 2. 5315, the vectors ps and pu
,, and p. is set. Here, trapezoidal block 1
In s, the vector ρ.

represents the vector of the shape defining line segment, and the size is the line segment P-P
-+ length, and the direction is the direction from point PS to point Ps-1 (hereinafter expressed as point P5...-point Ps).

The same applies to other vectors). The vector p us is the vector of the first virtual line segment, which is the point 08. .

- represents the direction of point O9, and vector pas is a vector of the second virtual line segment and represents the direction of point Q8°1-point Q5. Then, at 5316, the vector pus+
Among pat, vectors having different directions from vector p are examined. Here, if it is determined that the vector p ut of the first virtual line segment is a vector with a direction different from the vector ps, the point 0 is set as the symmetric point of the point Oi in 5319.
% is set and a normal trapezoidal block is calculated at 5320. On the other hand, if it is determined that the vector pas of the second virtual line segment is a vector whose direction is different from that of the vector Ps, the points Q and l are set as symmetrical points of the point Q8 in 5317, and the normal trapezoidal block is set in 5318. is calculated.

Here, the start number s=1, so the second
The vectors of the shape defining line segment, the first virtual line segment, and the second virtual line segment of the trapezoidal block t shown in FIG. 4 are set, respectively. That is, in the trapezoidal block t1, the shape defining line segment vector pI representing the direction from point P2 to point P, and point o2
- 0 points. A first virtual line segment vector pu+ representing the direction of point Q2 and a second virtual line segment vector p41 representing the direction of point Q are set. At 5316, vector P
Among ul+pat, vectors whose direction is different from vector pI are examined. Here, it is determined that the vector p□ of the second virtual line segment is a vector whose direction is different from that of the vector p1.

In 5317, the intersection number i=2, so the second
As shown in Figure 5, point Q2 with line segment 0+Q+ as the axis of symmetry
Let the point of symmetry be point Qz'. The direction of the vector p□' of the changed second virtual line segment becomes point Qt' - point Q1, which is the same as the direction of Peltle P+ and Pl. Next, 5
At 318, the leg-crossing trapezoid block OIQ+Ox
Q2 is normally changed to a trapezoidal block 01 QI O□Qz'.

5321, the data of the trapezoidal block after the change is changed to the leg-crossing trapezoidal block t1 of the trapezoidal block data area 72.
The data will be stored in the storage area where the previous data was stored. Here, since one leg-crossing trapezoidal block is changed to one normal trapezoidal block, the number of trapezoidal blocks does not change before and after the change, and data indicating that there is no data is not stored.

Next, in 5312, it is determined whether or not there is no leg-crossing trapezoidal block row to be read next, and the determination here is No. In 5313, the right leg shown in FIG. A series of crossed trapezoidal blocks is read out. In 5303, since both the start number S and the end number e of the read leg-crossing trapezoidal block sequence are N, it is determined as YES, and in 5322, the value of the intersection number i is set to N, and steps 3315 and below are executed. Ru.

Here, N is trapezoid number data indicating the last trapezoid block stored in the trapezoid block data area 72.

At 5315, vectors PN, puN and pdN
is set, and in 5316 it is determined that the vector having a different direction from vector P8 is the vector PuN of the first virtual line segment, and steps 3319 and 3320 are executed. 531
9, as shown in FIG. 27, the line segment ON 41
The point of symmetry of the point ON with Q s + 1 as the symmetry axis is the point ON
'. The direction of the vector P LIN' of the changed first virtual line segment becomes the point ON + 1 - the point ON', which is the same direction as the direction represented by the vector PN. At 5320, the leg-crossing trapezoidal block ON QN O+++ Q
N+1 is normally a trapezoidal block 07 ON 'QN ON+
+ Q N + 1.

At 5321, the modified normal trapezoidal block is stored in the trapezoidal block data area 72.

In step 5312, since there is no leg-crossing trapezoidal block sequence to be read next, the determination is YES and the leg-crossing trapezoidal block changing process ends.

Further, if the trapezoidal block located at at least one end of the trapezoidal block row stored in the trapezoidal block data area 72 is not a leg-crossing trapezoidal bronch, 5302
, 3303 are both NO, and 5314 to 532
2 is skipped.

As a result of the above execution, the Mx eM regions including the leg-crossing trapezoidal blocks shown in FIGS. 19 and 24 consist of only the normal trapezoidal blocks shown in FIGS. 21, 23, and 251 and 27, respectively. Changed to embroidery area.

The process of creating zigzag stitch data in S4 is performed by executing the steps shown in FIG.

First, in 5501, the current needle drop position flag is set to 1.
is set to This flag is set to either 1 or 2, and when it is 1, it means that the current needle drop position is on the side of the virtual line U, and when it is 2, it means that it is on the side of the virtual line d. .

Next, at 5502, the trapezoidal block data area 72
The data of the first trapezoidal block is retrieved from 550
In step 3, it is determined whether the data indicates no data, and if not, in step 5504, the zigzag embroidery data is blocked based on the data format designation data stored in the data format area 84. It is determined whether the request is in the data format or the -needle data format. If the data is obtained in block data format, it is stored as is in the zigzag data area 82 unless the retrieved data is data indicating no data.

On the other hand, if the retrieved data represents no data, 3504.505 is skipped, so the data representing no data is not stored in the zigzag stitch data area 82. Subsequently, at 5506,
The number of trapezoids stored in the trapezoid number area 74 is decremented by 1, and it is checked in 5507 whether the value of the trapezoid number area 74 is 0 or not, that is, the creation of zigzag stitch data for the trapezoid block is completed. It is determined whether or not the process has been completed, and if the process has not been completed, the data of the next trapezoidal block is retrieved at 5508.

As a result of the above repetition, the trapezoidal block data area 72
When all the data have been extracted and the value in the trapezoid number area 74 becomes 0, the determination result in step 5507 becomes YES, and the creation of the zigzag stitch data in the block data format is completed.

On the other hand, if the format of the zigzag stitch data being sought is the one-stitch data format, the midpoint of the two legs of the extracted trapezoidal block is found in 3509, and in 5510
The distance between these midpoints is found. And 5
At step 511, the number of stitches a is calculated by dividing the distance by the stitch density of the stitch density area 7o, and at step 5512, the number of needle drop points on the two bottoms (imaginary lines u and d) is calculated. It will be done. The needle drop points (s, c) do not include the vertices of each trapezoidal block, and are calculated as follows.

If the number of stitches a is an odd number, b = a / 2 c = a / 2 If the number of stitches a is an even number, if the current needle drop position flag is 1, b = a / 2-1 c = a / 2 Current When the needle drop position flag is 2, b = a / u c = a / 2-1 Next, in 5513, the X and Y coordinates of each needle drop position on the two bottoms are calculated, and from the current needle drop position Those coordinate data are alternately stored in the zigzag stitch data area 82.
is stored in This completes the creation of needle drop position data for filling one trapezoidal block with zigzag stitches. Thereafter, it is determined in 5514 whether the number of stitches a is an even number or not, and if it is an odd number, the current needle drop position flag is changed in 5515. If the previous value was 1, it will be changed to 2, and if it was 2, it will be changed to 1. If the number of stitches a is an even number, step 5515 is skipped.

Thereafter, needle drop position data for each trapezoidal block is obtained in the same way and stored in the zigzag stitch data area 82. However, if the retrieved data represents no data, 5504, 505, 5509~ 515 is skipped and the data of the next trapezoidal block is retrieved.

After all the trapezoidal block data have been extracted, the determination result in step 5507 becomes YES, and the creation of the zigzag stitch data in the -needle data format is completed.

Furthermore, as shown in Fig. 25 and Fig. 27, when performing zigzag stitch embroidery on two trapezoidal blocks that do not share one leg, the same procedure is used as in the case of two trapezoidal blocks that share one leg. Similarly, zigzag embroidery is performed. For example, the second
Trapezoidal blocks O, Q, 0□Ch' and 0□Q2 shown in Figure 5
0s Qs, trapezoidal block O+ Q+ Ox
When the last needle drop position of Qz' is point Qz', line segment 0□0. To the next needle drop position indicated by the side zigzag stitch data area 82, next, line segment Qz Q
.

A stitch is created to the next needle entry position on the side. In addition, when the last needle drop position is point 0□, from point 0□ to the next needle drop position indicated by the zigzag stitch data area 82 on the line segment Q, Q side, and then to the line segment Q20, a stitch is created to the next needle drop position on the side.

The created zigzag stitch data is stored in the magnetic tape, magnetic disk, etc. of the external storage device 54 in S5.

During actual embroidery, the zigzag stitch data is read from these magnetic tapes into the RAM 44 and used. As a result, the zigzag stitch embroidery shown in FIGS. 29 and 30 is obtained for the embroidery areas shown in FIGS. 19 and 24.

Each of these zigzag stitch embroideries fills the planned ta 9M area almost exactly, and is beautiful because the threads are thick and there are no overlapping areas.

As is clear from the above explanation, in this example,
The trapezoid block data area 72 of the RAM 44 constitutes the trapezoid block data storage means 1, and the trapezoid block data area 72 of the RAM 44 constitutes the trapezoid block data storage means 1. ROM4
2 and RAM44 5301~3303.5312~
The part that executes 5322 constitutes the trapezoidal block changing means 2.

One embodiment of the present invention has been described in detail above. When executing steps 5312 to 5322 of the flowchart shown in FIG.
1 may be set as the point Q,', and the direction of the changed vector 261' becomes point Q2 - point Q,', which is the same as the direction of vectors P+ and Pu+. 5318, the modified normal trapezoidal block O+Q+'O□Q2 is shown in FIG. Similarly, in 5319, the point is ON for the point 0°. The symmetry point of 1 may be set as the point ON+1', and the normal trapezoidal block Os changed in 5320
QN ON+1' QN++ is shown in FIG.

The obtained zigzag embroidery area is shown in FIG.

Here, when the start number s=1, the intersection number i=1 is set, and when the start number s=N, the intersection number i=N+1 is set.

In addition, the present invention can be implemented with various modifications and improvements based on the knowledge of those skilled in the art without departing from the scope of the claims.

[Brief explanation of drawings]

FIG. 1 is a block diagram conceptually showing the configuration of the present invention. Figures 2 and 3 are diagrams for explaining the inconvenience when a leg-crossing trapezoid pro-vine occurs, and Figures 4 to 6 are diagrams showing data processed using the previously proposed device. be. Figure 7(a). 8(b) and FIGS. 8(a) and 8(b) are diagrams in which data processing is performed by the previously proposed device when a leg-crossing trapezoidal block is located at at least one end of a trapezoidal block row. FIG. 9 is a perspective view showing an automatic sewing machine that performs zigzag stitch embroidery using data created by a data creation device including a data processing device according to an embodiment of the present invention, and FIG. 10 shows a control device thereof. Block diagram, 1st
FIG. 1 is a diagram conceptually showing the configuration of the RAM of the control device. FIGS. 12 to 16 are flowcharts showing only portions of the control program stored in the ROM of the control device that are closely related to the present invention. 17 to 28 are diagrams for explaining the operation of the control device, and FIGS. 29 to 31 are conceptual diagrams of zigzag embroidery obtained by executing the zigzag stitch data created by the control device. FIG. 12: Sewing machine arm 14: Needle bar support case 16: Needle bar 18: Needle

Claims (1)

[Claims] Two adjacent dots on a shape defining line defining the shape of an embroidery area in which zigzag stitches are to be performed with a predetermined zigzag width.
When imagining a first imaginary line and a second imaginary line that are parallel to each of the line segments connecting the points and whose mutual distance matches the zigzag stitch width, two imaginary lines between adjacent first imaginary lines The intersection point and the two intersection points of mutually adjacent second virtual lines are 4
a trapezoidal block data storage means for storing data of a trapezoidal block defined as one vertex; and a leg located at at least one end of a trapezoidal block row consisting of a plurality of trapezoidal blocks represented by the data stored in the trapezoidal block data storage means. 1. A data processing device for an embroidery sewing machine, comprising trapezoidal block changing means for changing leg-crossing trapezoidal blocks whose legs intersect with each other into normal trapezoidal blocks.