JPH0824775B2 - Offset sewing data creation device for sewing machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an offset sewing data creating device for automatically performing offset sewing for a desired figure pattern by a sewing machine.

[Conventional technology]

For example, in an industrial sewing machine such as an electronic cycle sewing machine,
A desired figure can be input as a sewing pattern by operating the keys on the operation panel.Furthermore, offset sewing data for a similar figure that is offset by the specified width inside or outside the figure is created, and the offset sewing is performed. There are some that have the ability to do.

Then, in order to create the offset sewing data with such a sewing machine, first, a desired figure pattern is input using the pattern input function.

That is, hold a cloth or paper on which the desired pattern is drawn on the outer presser foot of the sewing machine, move the outer presser foot in the front-rear, left-right direction so that the tip of the sewing needle follows the line forming the pattern, and at least both ends of the straight line. And the coordinate data of each input point is stored by instructing the input at a plurality of points on the curve (a large number of points are required where the bend is strong).

[Problems to be Solved by the Invention]

However, since the pattern input function of such a conventional sewing machine does not have the function of discriminating the line type and the cusp, the point and the curve of the type (line, curve, arc, etc.) of the line forming the pattern change. If there are cusps in the middle, they must be separated, and the input function must be selected for each section to input coordinate points, and needle entry data along the input pattern cannot be created. It was

Further, when the offset sewing data of the input pattern and the similar figure is created, the intersection point cannot be calculated at the connecting portion of each input section, and therefore the connecting portion needs to be corrected after the input.

For example, in the case of inputting a combined graphic pattern of straight lines and curved lines shown in FIG. 9 to create needle entry point data of an offset sewing pattern shown by broken lines,
The input figure was divided into a straight line 1, a curved line 1, and a curved line 2, and the following input operation was required.

(1) Select the straight line offset input function, set the stitch length and the offset width w, and then move the sewing needle and the figure relative to each other with one end of the straight line 1 as the current point (origin) and input the 0 point. To do.

As a result, the locus of the straight line 1 is input as shown in FIG. 10, and the straight line a offset from the straight line 1 to the outside by the offset width w, the thread cutting point at the end of the straight line a, and the idle feed data indicated by the broken line are obtained. Created.

(2) Next, after selecting the spline offset input function and setting the stitch length and offset width w again,
Input points 1 to 4 on the curve 1 as shown in the figure.

As a result, the locus of the curve 1 is input, and then the curve b offset outward by the offset width w, the thread cutting point at the end thereof, and the data of the idle feed shown by the broken line are created.

(3) Then, again select the spline offset input function to set the stitch length and offset width w, and then
Input points 5-8 on curve 2 as shown.

As a result, the locus of the curve 2 is input, and then the curve c offset by the offset width w to the outside, the thread cutting point at the end thereof, and the idle feed data shown by the broken line are created.

(4) However, the offset straight line created in this way
Curves a, curve b, and curve c are shown in FIG.
Since the connection part of C is missing and extra data of thread cutting point and jump feed is included, jump feed data as shown by the broken line in Fig. 13 (a) and c are marked with a square. The operation of deleting the data of the thread cutting point shown and adding the line connecting the two lines as shown in FIG.

In this way, in the past, input was terminated once every time there was a sharp point in the curve of the figure to be input or the type of seed changed, and the function selection and stitch length and offset width were set again and input. Since it is necessary to perform the correction work and the correction work for each connection portion of the offset pattern, the input work is complicated and troublesome.

The present invention has been made in order to solve such a problem. Even when creating offset sewing data of a complicated figure pattern in which straight lines and curved lines are combined, each necessary input of each coordinate point is performed once. You can enter all at once by selecting functions,
An object of the present invention is to make it possible to create offset sewing data (needle drop point data) that does not need to be corrected with respect to the input graphic.

[Means for solving the problem]

In order to achieve the above-mentioned object, the sewing machine offset sewing data creating apparatus according to the present invention has a plurality of input points along an offset width and a graphic pattern which are input by key operation, as shown in a functional block diagram of FIG. And input data storage means 1 for sequentially storing the data of the designated corner points, input point grouping means 2 for grouping the stored plurality of input points by dividing them into designated corner points, and the input for each group. Input point interpolating means 3 for creating interpolating points for interpolating points, and offsets stored in the input data storing means 1 for each input point of all groups interpolated by the interpolating point 3 An offset point calculating means 4 for calculating each offset point according to the width, and an offset point for dividing each of the calculated offset points into groups by dividing the offset points by offset specified points. Point grouping means 5 and needle drop point calculating means 6 for calculating the needle drop point for each group, and the needle drop point data calculated for all groups by the means 6 is used as offset sewing data. Is output.

[Work]

According to the present invention, when creating the offset sewing data, the input of the original figure pattern may be performed while designating the corners at the points where the cusps and line types in the curve change with a single function selection, The input data storage means 1 sequentially stores the input offset width and the coordinate data of each input point and corner designation point.

After that, the input point grouping means 2 divides the plurality of input points stored in the input data storage means 1 into groups by dividing them by designated corner points, and the inter-input-point interpolating means 3 groups the input points in each group. Create interpolation points that interpolate between the two.

Then, the offset point calculation means 4 calculates each offset point according to the offset width stored in the input data storage means 1 with respect to each input point of all the interpolated groups and the interpolation point and the angle designation point, and divides them into offset point groups. The means 5 divides the calculated offset points into groups by dividing them by the offset designated corner points.

Accordingly, the needle drop point calculation means 6 calculates the needle drop point for each group and outputs the data of the needle drop points calculated for all the groups as the offset sewing data.

Therefore, the solid pattern that is the basis of the offset sewing can be input all at once with a single function selection.
It is possible to create and output offset sewing data (needle entry point data) that does not need to be corrected for the input graphic pattern.

〔Example〕

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

FIG. 2 is a schematic perspective view showing a main body of a sewing machine having a function as an offset sewing data creating device according to the present invention.

In this sewing machine, a sewing machine main body 10 is fixedly installed on a table 15, and a sewing needle 11 and a presser foot 12 are attached to a head portion 10a thereof.

A frame-shaped outer presser 13 is provided so as to surround the sewing position by the sewing needle 11.

The outer presser 13 is composed of a lower frame 13a, an upper frame 13b, and an arm portion 13c that supports the lower frame 13a.The outer frame 13 is a cloth to be sewn in the sewing mode, and a cloth or paper on which a sewing pattern is drawn in the pattern input mode. Hold between 13a and upper frame 13b,
The XY drive mechanism 14 can freely move along the upper surface of the table 15 in the left-right (X) direction and the front-back (Y) direction.

FIG. 3 is a block diagram showing the configuration of the input section and the control section in this embodiment.

The input unit 16 is composed of an operation panel 18 having a large number of keys and a display and a pulse motor drive circuit 19.

The configuration and operation of the operation panel 18 will be described in detail later, but the pulse motor drive circuit 19 includes a pulse motor Mx for driving the X-axis in the XY drive mechanism 14 for moving the outer presser 13 and a drive for driving the Y-axis. Pulse motor My and control unit 17
It is a circuit that is driven according to a command from.

The control unit 17 has a control circuit 20 using a CPU for overall control of the entire device, a sewing function for straight line offset sewing (d1), spline offset sewing (d2), arc offset sewing (d3), and other various functions. Read-only memory (ROM) 21 that stores each operation program and the fixed data necessary for them, and stores the offset width and stitch length that have been input and the coordinate data of each input point and angle designation point, etc. The data of the needle drop point calculated by the circuit 20 is stored in the offset as sewing data, and the random access
A memory (RAM) 22, an I / O circuit 23 serving as an interface with the operation panel 18, and an I / O circuit 24 serving as an interface with the pulse motor drive circuit 19.

The control unit 17 fulfills the functions of the respective units 1 to 6 according to the present invention shown in FIG.

FIG. 4 is a layout diagram showing a specific example of the operation panel 18 of this embodiment.

The operation panel 18 is erected at an appropriate position on the table 15 in FIG. 2, and is provided with a display group consisting of the display units 30 to 35 and a key group consisting of the keys 41 to 59.

First, the display group will be described. The sewing display 30 is wholly lit in the sewing mode, and is lit only in the right end portion in the pattern input mode.

The error display 31 is a 7-segment display (fluorescent display tube, LED, liquid crystal, etc.). When an error occurs in the sewing mode, one of the error codes "1 to 9" is displayed, In the pattern input mode, "d" blinks, and at this time, 52, 54 to 56 of the numeric keys 51 to 59 described later are displayed.
Only 58 and 58 are valid.

All of the displays 32 to 35 are 3-digit 7-segment displays. The pattern number display 32 displays the mode and function. In the pattern input mode, the mode is "E: input",
Either "C: modify" or "A: add" as a function
"1: Straight offset sewing", "d2: Spline offset sewing", "d3: Arc offset sewing", etc. are selectively displayed.

The X enlargement / reduction ratio display 33 displays the X enlargement / reduction ratio in the sewing mode, but in the pattern input mode, the sewing type code and speed, or the distance in the X direction is displayed as, for example, "X.
Display as "10".

The Y enlargement / reduction ratio display 34 displays the Y enlargement / reduction ratio in the sewing mode, but displays the stitch length in mm in the pattern input mode, or displays the Y-direction distance, for example, "Y.
Display as "10". Further, when the stitch length is input, the stitch lengths that can be selected are sequentially displayed.

The bobbin thread setting display 35 displays the bobbin thread setting value in the sewing mode, but displays the width of the zigzag stitch or the offset stitch in mm unit in the pattern input mode, or the number of input points and the point movement When displaying the distance.

Next, the key group will be described. When the feed advance key 41 is pressed, the position moves one stitch at a time from the current point toward the end point along the created pattern. To use the pattern input function, turn on the power switch while pressing this key 41.

When the feed / reverse key 42 is pressed, the position moves one stitch at a time from the current point toward the origin along the created pattern. When pressed during pattern input, the previous input point is canceled and the needle position is returned.

When the home return key 43 is pressed, the needle position returns from the current point to the home.

Only the names and functions of the following keys in the pattern input mode will be described.

The selection key 44 is a key for function selection.
When the desired function code is displayed at 32, pressing this selects that function.

The pattern No key 45 is not used in the pattern input mode, and therefore its explanation is omitted.

The confirmation key 46 is pressed when it is desired to confirm the input shape when finishing inputting one element. When this key 46 is pressed, the needle position moves from the sewing start of the input element according to the sewing shape and then stops at the end point of the element.

The end key 47 is pressed when finishing inputting one element. In this case, the input shape is not confirmed.

The designation key 48 is used when setting the stitch length and the offset width value, and when the set value is reached, the designation key 48 is pressed.

The trial sewing key 49 is pressed when shifting to the trial sewing and returning to the pattern input mode again.

The cancel key 50 is pressed during the operation to cancel the operation.

Of the number keys 51 to 59 of "1" to "9", the input key 55
Is pressed when inputting the coordinate value data of the input point of the element.

The move keys 52 and 58 are used to change the display of the function and the value by advancing or returning in order when selecting the function and when setting the stitch length and the offset value.

The four movement keys 52, 54 to 56, 58 are used to move the above-mentioned outer presser 13 to X,
Drive the needle in the Y direction until the point at which you want to enter
Used to move the position of relative to.

Next, the procedure of the input operation by the operation panel 18 will be described by taking as an example the case where the figure pattern shown by the solid line in FIG. 5 is input according to this embodiment to create the sewing data of the offset pattern shown by the broken line. A description will be given mainly with reference to FIG.

First, the lower frame 13a and the upper frame 13b of the outer presser 13 of FIG. 1 are used to hold the paper on which the graphic pattern shown by the solid line in FIG. 5 is drawn, and then the feed forward key 41 of the operation panel 18 is pressed. A power switch (not shown) is turned on to enter the pattern input mode.

 After that, the input operation is performed in the following procedure.

(1) Press the move key 52 or 58 to display the function code "E.d2: Spline off set sewing" on the pattern No. display 32, and then press the select key 44 to select that function.

(2) Press the move key 52 or 58 to display the Y enlargement / reduction ratio indicator 34.
After the desired stitch length value is displayed on, the designation key 48 is pressed to register the value.

(3) Press the move key 52 or 58 to display the desired offset width value on the bobbin thread setting display 35, and then press the designation key 48 to register the value.

(4) Since the digitizing wait is on after the above operation, the four moving keys 52, 54 to 56, 58 are pressed, and the sewing needle 11 in FIG. 2 is moved to the initial position in FIG. ) Move the outer presser foot 13 until it coincides with the point to be input, and when it coincides, press the input key 55 to input that point.

Accordingly, the coordinate value data of the input point is detected by the control circuit 20 of FIG. 3 and stored in the memory (RAM) 32.

 By this operation, the point 0 in FIG. 6 is input.

(5) Since the figure to be input has a corner (cusp) at this 0 point, move the outer clamp 13 by 1 pulse in either the X or Y direction to specify that it is a corner. (Press one of the four movement keys 52,54 to 56,58 once), Enter key
Press 55 and enter the designated corner point 1.

(6) Subsequently, the same operation as (4) is performed to input points 2 to 5 in FIG.

(7) Since the corner is designated at the position of the input point 5, the corner designated point 6 is input by the same operation as in (5).

(8) Then, perform the same operation as (4), and
Enter the point.

(9) Since the corner is designated at the position of the input point 9, the corner designated point 10 is input by the same operation as in (5).

(10) Next, perform the same operation as in (4), and input the point 11.

(11) Press the confirmation key 46 or the end key 47 to end the input.

By such input operation, the respective values of the stitch length and the offset width and the coordinates of the required input points 0, 2 to 5, 7 to 9 and 11 of the figure pattern shown by the solid line in FIG. The value data and the coordinate value data of the designated corner points 1, 6, 10 are stored in the memory 22 in the control unit 17 in FIG.

Therefore, next, the control circuit (CPU) 20 of the control unit 17
The needle drop point data is calculated based on the data stored in the memory 22, and the offset sewing data having the pattern shown by the broken lines in FIGS. 5 and 6 is created.
This will be described with reference to the flow chart in the figure and FIG.

When the process of FIG. 7 is started, first, in step 1, the memory is
The input point groups 0 to 11 (1, 2 shown in FIG.
6, 10) are divided into groups by separating the corner designation points as marks, and in this example, they are divided into 4 groups of 0 to 1, 2 to 6, 7 to 10, and 11. Then, the coordinate value data of each input point is sequentially taken out in group units from the first group to the fourth group.

Then, in step 2, in order to accurately offset the shape of the figure and to accurately perform the intersection calculation, an interpolation point for interpolating the respective input points is created for each group by using the curve interpolation routine.

The above processing is repeated until the processing is completed for all the input points in step 3, and when the processing is completed, the processing proceeds to step 4. The input data after this processing is, for example, as shown in FIG. It has the coordinate value data of the points 0 to 26, in which interpolation points are added to the specified points and.

In step 4, the memory 22 is set for each of the points 0 to 26.
Calculate the offset point according to the offset width stored in. Here, the offset point of the designated corner is also calculated.

Further, in order to calculate the offset position of, for example, 3 points which are the corner points, first, the offset figures 2'-3 'and 3'-5' of the straight line 2-3 and the straight line 3-5 are shown in FIG. Then, the intersection 3 ″ may be obtained by the calculation as shown in FIG.

In the conventional input method, the data of line 3-5 is 3
Since it was not input at the time of calculating the offset position of the point, it was not possible to obtain the intersection 3 ″, but according to the present invention, all the data are collectively input and form a lump of data. , The intersection 3 ″ can be obtained by referring to the data of the straight line 3-5.

The input data after this processing becomes points 0'-26 'shown in FIG.

Next, in step 5, the offset point group is divided into groups of offset corner designation points 4 ', 14', 24 'as marks, and in the case of the example shown in FIG. ',Five'
It is divided into four groups of 13 ', 15' to 23 ', 25' to 26 '.

Then, the coordinate value data of the offset points are taken out in group units from the first group to the fourth group.

Further, in step 6, only the points belonging to each group are used, the curve interpolation is performed using the curve interpolation routine, and the needle drop based on the value of the stitch length (hand movement pitch) stored in the memory 22 is performed. Calculate the points.

In step 7, it is judged whether or not all offset points have been processed, and the processes of steps 5 and 6 are repeated until the processing is completed, and all the processes of this routine are completed.

The data of the needle drop point calculated in step 6 may be output as it is as the offset sewing data, but normally it is the third stitch.
The data is stored in the memory (RAM) 22 shown in the figure, and the same offset sewing can be performed by using the data any number of times.

Further, the offset sewing data can be stored and saved in a floppy disk or the like.

As described above, according to this embodiment, the graphic pattern in which the straight line and the curved line are combined can be collectively input by one function selection. Therefore, not only the input operation is simplified, but also all the input points include the intersection point calculation. It becomes the effective range of offset calculation,
It is possible to calculate the intersection point at a connecting portion such as a straight line and a curve or curves on both sides of a point.

Therefore, the correction work, which has been necessary in the past, is not required, and the offset sewing data can be created extremely efficiently.

In the embodiment described above, the sewing machine itself is provided with a function as an offset sewing data creation device so that it can be used by switching between the sewing mode and the pattern input mode. It is convenient because the trial sewing can be performed immediately after the data is created, and if desired, the sewing can be started as it is, but the offset sewing data creating device can be configured as a device different from the sewing machine.

〔The invention's effect〕

As described above, by using the sewing machine offset sewing data creating apparatus of the present invention, even when it is desired to perform the offset sewing of a complicated figure pattern in which straight lines and curved lines are combined, the figure patterns can be collectively selected by the same function selection. The input efficiency is good because it can be input in the same way, and the data of each needle entry point on the offset pattern is calculated based on the data of each input point and the specified corner of the figure pattern and the offset width, and it is completely automatic. The offset sewing data can be created, and the conventional correction work of the connecting portion between the straight line and the curved line becomes unnecessary.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing a basic configuration of an offset sewing data creating device for a sewing machine according to the present invention, and FIG. 2 is a schematic view showing a main body of a sewing machine having a function as an offset sewing data creating device according to the present invention. FIG. 3 is a perspective view, FIG. 3 is a block diagram showing the configuration of the input unit and control unit in this embodiment, FIG. 4 is a layout diagram showing a concrete example of the operation panel 18 in FIG. 3, and FIG. FIG. 6 is an explanatory view showing an example of a graphic pattern to be input and its offset pattern, FIG. 6 is an explanatory view for explaining the input operation of the graphic pattern according to this embodiment, and FIG. FIG. 8 is a flow chart of offset sewing data creation processing, FIG. 8 is an explanatory diagram for explaining the processing of FIG. 7, and FIGS. 9 to 13 are explanations for explaining conventional offset sewing data creation procedures. It is. 10 …… Sewing machine main body, 11 …… Sewing needle 13 …… Outer presser foot, 14 …… XY drive mechanism 15 …… Table, 16 …… Input section 17 …… Control section, 18 …… Operation panel 19 …… Pulse motor drive circuit 20 …… Control circuit (CPU) 21 …… Memory (ROM), 22 …… Memory (RAM) 30 to 35 …… Display unit, 41 to 59 …… Key

Continuation of the front page (56) Reference JP 60-205774 (JP, A) JP 60-160476 (JP, A) JP 62-170287 (JP, A) JP 1-250291 (JP , A) JP 62-112585 (JP, A) JP 1-290078 (JP, A) JP 2-12568 (JP, A) JP 2-90270 (JP, A) JP 2-249580 (JP, A) JP-A-3-77579 (JP, A) JP-A-2-51779 (JP, A) Actually developed 55-170074 (JP, U) JP-B-63-9245 (JP, A) B2) Japanese Patent Publication No. 62-40039 (JP, B2) Japanese Patent Publication No. 60-43149 (JP, B2)

Claims (1)

[Claims] 1. An input data storage means for sequentially storing data of a plurality of input points and corner designation points along an offset width and a sewing pattern input by key operation, and a plurality of input data storage means stored by the means. An input point grouping means for dividing the input points into groups by dividing them by designated corner points, and an inter-input point interpolating means for creating an interpolation point for interpolating the input points for each group divided by the means. Offset point calculation means for calculating each offset point according to the offset width stored in the input data storage means for each input point of all groups interpolated by the means, the interpolation point and the angle designation point, An offset point grouping means for grouping each offset point calculated by the means by dividing the offset points by the offset specified corner points; and a grouping means for dividing by the means. And needle drop point calculation means for calculating the needle drop point for each group, and the data of the needle drop point calculated by the means for all groups is output as the offset sewing data. A sewing machine offset sewing data creation device.