JPH01285288A - Data creating device for sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial use! FF] The present invention relates to a data creation device for a sewing machine, and is capable of sewing the seam pattern along a desired curved line when sewing a stitch pattern such as characters, symbols, etc. on a fabric by flit. The present invention relates to a data creation device that enables data creation.

[Prior Art 1] Conventionally, it is well known that stitch patterns such as letters and symbols are sewn onto work cloth using a sewing machine. In this case, the operator first selects a stitch pattern to sew.

Based on this selection, the sewing machine ff, II control device reads the pattern data of the stitch pattern selected by the operator from among the pattern data for sewing each stitch pattern stored in advance in the storage device, and The sewing machine needle and the work cloth holding means are moved relative to each other based on the data.

As for the sewing of the sewing pattern sewn in this way, the prior art in the position is disclosed in Japanese Patent Application Laid-Open No. 62-120 by the applicant of the present application.
There is one described in Publication No. 877.

This described technique involves sewing a desired stitch pattern along an arbitrary reference curve that smoothly connects at least three or more points set by the operator.

[Problems to be Solved by the Invention] However, in the above described technique, it is difficult to arrange the desired stitch pattern evenly along the reference curve and around an arbitrary point on the reference curve before and after that point. However, there was a problem in that the operator himself had to calculate and find the arrangement position of the stitch pattern based on the size of the stitch pattern, which required a lot of effort.

The present invention has been made to solve the above-mentioned problems, and its purpose is to create a desired stitch pattern along a predetermined reference curve and centered at an arbitrary point on the reference curve. To provide a data creation device for a sewing machine that can easily arrange and sew substantially evenly.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides three
1, a pattern data storage means for storing pattern data indicating a relative position of the work cloth holding means for holding the work cloth for each seam pattern, and a selection means for selecting the seam pattern from the pattern data storage means. , a reference curve setting means for setting a reference curve for the work cloth held by the work cloth holding means, and a center point specifying means for specifying an arbitrary point on the reference curve as a center point; calculation means for calculating and correcting the pattern data of the stitch patterns so that the selected stitch patterns are arranged substantially evenly along the reference curve and with the center point specified by the center point specifying means as a reference; The sewing machine includes sewing data storage means for storing data calculated by the calculation means as sewing data.

[Operation] In the present invention, when a desired stitch pattern is selected by the selection means, a reference curve is set by the reference line setting means, and a center point is specified by the center point designation means, the calculation means The pattern data of the seam pattern is calculated and corrected so that the seam pattern is arranged substantially equally along the center point, and the calculated data is stored in the sewing data storage means as sewing data. .

[Embodiment] An embodiment in which the present invention is embodied in an electronic training sewing machine will be described below with reference to FIGS. 1 to 5.

First, the mechanical configuration of this embodiment will be explained with reference to FIG.

A sewing machine main body 4 consisting of a bed 2 and an arm 3 is placed on a sewing machine table 1. On the bed 2 is the throat plate 5.
is attached, and a needle hole 6 is formed approximately at the center of the shaft.

The upper surface of the bed 2 and the upper surface of the sewing machine table 1 constitute a coplanar work cloth support surface. A needle bar 8 having a needle 7 at its lower end is supported by the arm 3 so as to be movable up and down, and the needle bar 8 is moved up and down by rotation of a sewing machine motor (path shown). The needle 7 on the needle bar 8 and a hook (path shown) provided in the bed 2 constitute a stitch forming means.

A work cloth holding means is arranged on the work cloth support surface, and the work cloth holding means includes an embroidery frame 9 and an embroidery inner frame 10.
It is composed of. The embroidery frame 9 holds the work cloth between the embroidery inner frame 10 and the X-axis pulse motor 23 shown in FIG.
It is moved in the X-axis direction and the Y-axis direction based on the rotation of the Y-axis pulse motor 24, and is moved relative to the 1t7.

A data creation device 30 is provided on one side adjacent to the sewing machine staple 1, and the data creation device 30 includes a keyboard 13 operated by the operator to select a stitch pattern, a stylus pen 14a, and a tablet. A digitizer 14 consisting of a board 14b and an image display device 12
and an external storage device 11.

Next, the electrical configuration of this embodiment will be explained according to FIG.

A central processing unit (hereinafter referred to as CPU) 15 performs various controls in addition to calculations, and includes a program memory 16 consisting of a ROM storing a control program shown in the flowchart of FIG. A working memory 17 consisting of a RAM for storing sewing data for forming edited stitch patterns is connected.

A keyboard 13, an external storage device 11 as a pattern data storage means, and a digitizer 14 are connected to the CPU 15 via an interface 18, and the keyboard 13 generates signals corresponding to various commands to be sent to the CPU 15.
supply to. The external storage device 11 stores a plurality of pattern data and display data for visually displaying the 11 stitch patterns on the display device 12 for each stitch pattern such as characters and symbols.

For example, as shown in FIG. 3, the pattern data includes a basic block B containing one stitch pattern "A" and indicating the area occupied by the stitch pattern (1 & direction x Y-axis direction) and lateral force. The basic data VD and HD indicating the size of the basic blocks (X-axis direction), the lock starting point used when arranging the basic blocks, and the stitch pattern "A" is divided into polygonal locks, and each block is It is composed of a group of position data representing the vertices of the basic block B as relative positions with respect to the origin I) o. This position data is composed of an X-axis component and a Y-axis component.

The digitizer 14 converts the coordinate data of the tablet board 14b specified by the stylus pen 14a into a CP.
Output to U15.

Furthermore, a pulse motor drive circuit 20, 21 and a display drive circuit 22 are connected to the CPU 15 via an interface 19. An X-axis pulse motor 23 is connected to the pulse motor drive circuit 20, a Y-axis pulse motor 24 is connected to the pulse motor drive circuit 21, and CPtJ1
The pulse motors 23 and 24 are driven and controlled by supplying a drive control signal to each pulse motor drive circuit 20, 21 via the interface 19 based on the sewing data.

The display device 12 is connected to the display drive circuit 22,
The CPU 15 supplies a display control signal to the display drive circuit 22 via the interface 19 based on the display data, so that the display device 12 performs a display operation.

Next, the operation of the actual reduction will be explained according to the flowchart of FIG.

First, after pasting a piece of paper on which an arbitrary free curve K is drawn on the tablet board 14b, the worker presses the start switch (
(not shown), the CPU 15 proceeds to a stitch pattern selection routine (step 50). In this routine, when the operator selects, for example, the stitch pattern "rA", rY) and presses a selection end key (not shown), the CPU 15 selects the stitch pattern "A".

The pattern data of "Y" is read from the external storage device 11 and stored in a predetermined storage area of the working memory 17.

Thereafter, the CPU 15 proceeds to a specified point storage routine (step 51), stores in the memory 17 the coordinate data generated each time the operator presses a number of arbitrary points on the free curve with the stylus pen 14a, When a specified point storage end key (not shown) is pressed, the process advances to step 52.

Based on the stored coordinate data of the designated point, the CPU 15
Using the free curve K passing through the specified point as a reference curve, calculation is performed using a spline function, and the result is displayed on the display device 12.

After this, the CPU 15 determines whether or not the center point designation key (not shown) has been pressed (step 53).0 An arbitrary point 1 ([) on the free curve is pressed by the operator with the stylus pen 14a. and when the center point specification key is pressed,
The CPU 15 stores the coordinate data of the point KP as the center point in the working memory 17, displays the point on the display device 12, and proceeds to the next step 54.

The CPU 15 reads the basic data HD in the X-axis direction from the pattern data of the stitch patterns rAJ and rY selected in the stitch pattern selection routine, and calculates the total sum T.
is calculated and the process proceeds to the next step 55.

In step 55, C1)U15 calculates a point on the reference curve that is T/2 apart from the center point KP and stores it as the array starting point F, as shown in FIG.

The CPU 15 selects the array starting point F. The first stitch pattern "A"
The starting point of the block is point F, as shown in FIG. A point on the reference curve that is away from the basic data IID is set as the array end point of the basic block B, and is also stored as the block start point F1 of the next stitch I] pattern. The CPU 15 performs this operation for all the selected stitch patterns rAJ, rY (steps 56 to 59).

After this, the CPU 15 executes the mth (m=o, 1°2...
) sewing [l pattern array start point Fm and array end point Fm++
Calculate the angle θm between the straight line passing through and the X-axis direction, and m
Among the pattern data of the th stitch pattern, the position data group is rotated by an angle θm around the point Fm. The CPU 15 performs this operation for all selected stitch patterns (
Steps 60 to 64), and thereafter, the CPU 15 stores the calculated data as sewing data in a predetermined storage area of the working memory 17 (step 65), displays it on the display device 12, and ends the data creation work.

After the data creation work, when the sewing start switch (not shown) is pressed, the CPtJ15 starts the X-axis and Y-axis pulse motors 23 based on the sewing data stored in the working memory 17.
, 24 are driven to sew stitch patterns "A" and "Y" on the work cloth along the reference curve and evenly arranged with the center point as a reference.

The present invention is not limited only to the above-described embodiments, and various modifications are possible.

[Effects of the Invention] As is clear from the above speed measurement, according to the present invention, an arbitrary point on the reference curve is set as the center point, and the center point is selected as the reference point. Since the seam patterns can be automatically arranged substantially evenly, there is an advantage that work efficiency can be improved.

[Brief explanation of the drawing]

1 to 5 show an embodiment embodying the present invention, FIG. 1 is a block diagram thereof, FIG. 2 is a perspective view showing the overall mechanical configuration, and FIG. 3 is a seam pattern. FIG. 4 is an explanatory diagram of pattern data, FIG. 4 is a flowchart, and FIG. 5 is an explanatory diagram showing the arrangement of stitch patterns. Ru. In the figure, 7 is a needle, 9 is an embroidery frame, 10 is an embroidery inner frame, 11 is an external storage device (pattern data storage means), 13 is a keyboard (selection means), and 14 is a digitizer (reference line setting means, center point specification) 15 is a CPU, 17 is a working memory (sewing data storage means), K is a reference curve, and KP is a center point.

Claims (1)

[Claims] 1. Pattern data in which pattern data indicating the relative position of the needle (7) that is moved up and down and the work cloth holding means (9, 10) that holds the work cloth is stored for each stitch pattern. Storage means (1
1), a selection means (13) for selecting the stitch pattern from the pattern data storage means, and a reference curve for setting a reference curve (K) for the work cloth held in the work cloth holding means. a setting means (14); a center point specifying means (14) for specifying an arbitrary point on the reference curve as a center point (KP); A calculation means (such as 15) that calculates and corrects the pattern data of the stitch patterns so that the selected stitch patterns are arranged approximately equally with the center point as a reference; the data calculated by the calculation means is stored as sewing data; 1. A data creation device for a sewing machine, comprising: sewing data storage means (17).