JP2595970B2 - Sewing machine with display - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sewing machine provided with a display device for displaying a stitch pattern.

(Prior Art) Conventionally, as a sewing machine of this type, when pattern data corresponding to a plurality of stitch patterns to be sewn is selected by a key operation on an operation panel, based on display data corresponding to the pattern data. In some cases, a stitch pattern is displayed on a display device.

(Problems to be Solved by the Invention) However, in this conventional sewing machine, the display data is determined based only on the outer shape of the stitch pattern.
Since there is no association between the display data and the relative position data of the needle and the work cloth holding means in the pattern data, the relative position of the needle and the work cloth holding means that changes with the progress of sewing is displayed. There is a problem in that it cannot be identified by the device, and the progress of the actual sewing operation cannot be confirmed from the display device.

(Object of the Invention) The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to make it possible to simply display a detailed progress of a sewing operation by a display device without confirming an actual sewing state. Another object of the present invention is to provide a sewing machine having a display device that can be visually recognized with certainty.

(Means for Solving the Problems) In order to achieve the above object, in the present invention,
In a sewing machine, a plurality of pattern data corresponding to a sewable stitch pattern is stored in a storage unit, and a stitch pattern appropriately selected from the storage unit is sewn based on the pattern data corresponding to the stitch pattern. A display device for displaying the selected stitch pattern, and when the selected stitch pattern is sewn based on pattern data corresponding to the stitch pattern, an actual Display control means (switch) for switching the display to a plurality of stages for each stitch pattern on the display device so that it is possible to identify to which part of the stitch pattern is being sewn the sewing has progressed. According to this, the stitch pattern appropriately selected from the storage means is sewn by the sewing machine based on the pattern data corresponding to the stitch pattern. Further, the selected stitch pattern is displayed on the display device. Then, when sewing the stitch pattern appropriately selected from the storage means based on the pattern data corresponding to the stitch pattern, the display control means relates to the sewing operation based on the pattern data, and Is displayed on the display device in a plurality of stages for each stitch pattern so that it is possible to identify to which part of the stitch pattern the sewing has progressed.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 2, a sewing machine main body 4 including a bed 2 and an arm 3 is placed on the sewing machine table 1. A needle plate 5 is mounted on the bed 2, and a needle hole 6 is formed substantially at the center thereof. A needle bar 8 having a needle 7 at a lower end is supported on the arm 3 so as to be vertically movable, and a needle 7 on the needle bar 8 which is moved up and down with rotation of a sewing machine motor (not shown).
A stitch is formed on the work cloth 9 by cooperation between the work cloth and the shuttle (not shown) in the bed 2.

A pair of right and left mounting frames are provided on the rear side of the sewing machine table 1.
The frames 10 and 11 are arranged and fixed at predetermined intervals, and a feed screw 12 and a rotation transmission shaft 13 are rotatably supported between the frames 10 and 11. An X-axis pulse motor 14 for rotating the feed screw 12 via a gear mechanism (not shown) is mounted on the right mounting frame 11.
A Y-axis pulse motor 15 for rotating the rotation transmission shaft 13 is mounted on the left mounting frame 10.

An X-axis moving table 16 that can move in the axial direction is inserted into the feed screw 12, and the X-axis moving table 16 includes a guide pipe 17 extending in a direction orthogonal to the feed screw 12 and the rotation transmission shaft 13. ing. And, at the end of the guide pipe 17, a support
18 is installed. The guide pipe 17 supports a Y-axis moving base 19 that can move in the axial direction. One end of a pair of connecting wires 20 connected to the rotation transmission shaft 13 is fixed to the Y-axis moving base 19. ing. An embroidery frame 21 is provided on the Y-axis moving table 19, and the work cloth 9 is held between the embroidery frame 21 and an embroidery inner frame 22 constituting work cloth holding means.

Therefore, the embroidery frame 21 is moved in the X direction via the feed screw 12 and the X-axis moving base 16 based on the rotation of the X-axis pulse motor 14, and based on the rotation of the Y-axis pulse motor 15, It is moved in the Y-axis direction via the rotation transmission shaft 13, the connecting wire 20, and the Y-axis moving base 19. Note that a driving unit is configured by the sewing machine motor and the pulse motors 14 and 15.

A control device 25 provided on one side of the table 1 has a keyboard 23 for selecting a stitch pattern to be sewn and an 8-digit dot matrix display device for displaying the stitch pattern as a dot aggregate. 24 are provided.

Next, a control circuit built in the control device 25 will be described with reference to FIG. CPU31 as display control means
Is provided with a program memory 32 composed of a ROM storing a control program, and a working memory 33 composed of a RAM as second storage means. The CPU 31 is connected to a basic data memory 34 as a first storage means composed of a ROM, a floppy disk, or the like.
A plurality of pattern data corresponding to various embroidery patterns and display data corresponding to each pattern data are stored.

As shown in FIGS. 7 (a) and 7 (b), the pattern data includes a predetermined origin G of the pattern data and a rectangular shape including the entire pattern and having the origin G as one vertex. A mask M, and a stitch block B having a predetermined shape for dividing a pattern forming portion,
Each stitch block B includes a data group of a needle drop position P required for embroidering a pattern, that is, a coordinate data group for two axes X and Y orthogonal to each other. Further, the display data is constituted by a vertex Bp of the stitch block B.

When a pattern selection signal is input by operating the keyboard 23, the CPU 31 reads out the pattern data and display data corresponding to the pattern selection signal from the basic data memory 34 and temporarily stores them in the working memory 33. . or,
The CPU 31 determines an interface 35 based on the pattern data.
A drive control signal is output to each of the pulse motor drive circuits 36 and 37 through the control unit 40 to control the drive of each pulse motor 14 and 15. Further, the CPU 31 outputs a display control signal to the display drive circuit 38 via the interface 35 to cause the display device 24 to perform a display operation.

Next, the operation of the sewing machine in this embodiment will be described.
In step S1 shown in FIG. 3 (hereinafter simply referred to as S1 and other steps are the same), the CPU 31 waits for the input of a pattern selection signal, and responds to a stitch pattern (for example, “A”) by operating the keys on the keyboard 23. When the input signal is inputted, the process proceeds to the next S2, where the pattern data and the display data corresponding to the pattern selection signal are read out from the basic data memory 34 and
Transfer to

Subsequently, in S3, based on the display data, the stitch pattern "A" is displayed at a normal low luminance with the display device shown in FIG.
Displayed in the eighth digit of 24. And the processing of S1 to S3 is
In S4, the sewing start signal is output from the sewing start switch SW1 (second
Each time the pattern selection signal is input, the CPU 31 carries up the display position of each stitch pattern, and sequentially deletes the previously selected pattern while sequentially deleting the previously selected pattern. Is displayed in the eighth digit. And finally, for example, "I", "B",
When twelve patterns consisting of "c", "le" and "o" are selected, eight patterns after "e" are displayed as shown in Fig. 6 (c).

Next, when the sewing start signal is input, the CPU 31 proceeds to S5.
Change the pattern display state in the first
The eighth to eighth patterns are displayed (see FIG. 6B). In S6, the sewing machine motor (not shown) and each of the pulse motors 14 and 15 are operated based on the first pattern data "A", and the embroidery frame 21 is moved in the X and Y directions while the needle 7 is moved up and down. To perform sewing.

With the execution of the sewing, the relative positions of the needle 7 and the embroidery frame 21 are changed, and when the changed relative position matches the vertex Bp of the stitch block B shown in FIG. Since the answer is YES, the CPU 31 changes the dot corresponding to the vertex Bp to high brightness on the display device 24 in response to the answer (S8). If the determination in S7 is NO, the normal low luminance display is maintained (S9).

On the other hand, if an interrupt signal such as an output signal from the emergency stop switch SW2 shown in FIG. 2 or an output signal from a thread breakage detection device (not shown) is input in S10 during the execution of the sewing, the interrupt subroutine of S11 is executed. Processing is performed.

Here, the subroutine will be described. As shown in FIG. 5, after the input of the interrupt signal, the CPU 31
In step a, the drive of each of the pulse motors 14, 15 and the sewing machine motor is stopped to interrupt the sewing. Next, in S11b, input of the idle feed signal is waited for by a predetermined key operation on the keyboard 23, and when that signal is not input, the process jumps to S11l. When the signal is input, in response to the signal, the CPU 31 drives the sewing machine motor to hold the needle 7 at the needle upper position, and operates the pulse motors 14 and 15 according to the relative position data in the pattern data. Then, the idle feeding is given to the work cloth 9 (S11c). After this idle feeding operation, the CPU 31 executes the same processing as S7 to S9 described above in S
Executed in 11d, S11e, and S11f. When the relative positions of the needle 7 and the embroidery frame 21 match the vertex Bp of the stitch block B after the idle feeding operation, the dot corresponding to the vertex Bp is displayed with high luminance. In addition, when the pattern to be read is changed along with the idle feeding operation, the determination in S11g is YES, and in the next S11h, it is determined whether the change in the pattern is on the display carry side. Is done.

If the determination is YES, the process proceeds to S11i, and the CPU 31 carries the display state on the display device 24 from, for example, the state shown in FIG. 6 (b) to the state shown in FIG. 6 (d). If the determination in S11h is NO, the display state is lowered in S11j.

On the other hand, when the determination in S11g is NO, a pattern currently involved in sewing is displayed, and the S11i, S11j, S11k are displayed.
After the execution of step S11l, the process similarly advances to S11l, and waits for input of a sewing restart signal by operating the sewing start switch SW1.
When the signal is input, the process exits the interrupt subroutine and returns to the main routine.

Then, in S12, it is determined whether or not sewing of one pattern has been completed, and if the determination is NO, the aforementioned S6 to S1
Step 1 is repeated. If the determination is YES, the display state is updated from, for example, the state shown in FIG. 6B to the state shown in FIG. 6D, and the pattern “R” whose display has been suspended is displayed in the eighth digit. At the same time, the pattern "B" to be sewn next is displayed in the first digit (S13).

Subsequently, in S14, it is determined whether or not the sewing corresponding to all the patterns selected previously is completed, and the determination is YES.
Until the above, the processes of S4 to S13 are repeated.

As described above, in this embodiment, when the relative positions of the needle 7 and the embroidery frame 21 are changed during the pattern sewing operation or the idle feeding operation, the relative position after the change is changed to the top of the stitch block B. If it matches Bp, display device
On 24, the luminance of the vertex Bp is changed from low luminance to high luminance. That is, as the relative positions of the needle 7 and the embroidery frame 21 are changed by the sewing operation based on the pattern data, on the display device 24, the brightness of the first vertex Bp changes from low to high, and the brightness of the next vertex Bp changes. The luminance is sequentially switched and displayed from low luminance to high luminance in a stepwise manner. Therefore, the operator can easily confirm the progress of the sewing only by the display device 24 without looking at the actual sewing status.

The present invention is not limited to the above embodiment, but can be embodied in the following modes. (A) After changing the relative positions of the needle 7 and the embroidery frame 21,
Make the dots blink instead of changing the dot brightness.

(B) The display data is configured to correspond to all coordinate data constituting the pattern data, and every time the relative position between the needle 7 and the embroidery frame 21 is changed, a dot corresponding to the changed relative position is displayed. High brightness display.

(C) Use a monochrome CRT display as the display device.

(D) A display device capable of color display is used, and when the relative position is changed, the corresponding dot is displayed in a different color from the other dots.

(Effects of the Invention) As described above in detail, the present invention has an excellent effect that the detailed progress of the sewing operation can be easily and reliably visually recognized on the display device without confirming the actual sewing state. Demonstrate.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a control device of a sewing machine embodying the present invention, FIG. 2 is a perspective view of the sewing machine, FIGS. 3 to 5 are flowcharts, and FIGS. 6 (a) to (d) are patterns. FIGS. 7 (a) and 7 (b) are illustrations of pattern data and display data. In the drawing, 7: needle, 9: work cloth, 14: X-axis pulse motor, 15: Y-axis pulse motor (driving means is constituted by the 14, 15 and the like), 21: embroidery frame .., 22... Embroidery inner frame (work cloth holding means is constituted by the above 21 and 22), 23... Keyboard as operating means, 31... CPU as display control means, 33. Working memory as means, 34... Basic data memory as first storage means;

Continuation of front page (56) References JP-A-60-19981 (JP, A) JP-A-57-29103 (JP, A) JP-A-60-148584 (JP, A) , U) Japanese Utility Model Showa 62-13474 (JP, U) Japanese Utility Model Showa 61-198672 (JP, U)

Claims (1)

(57) [Claims] A plurality of pattern data corresponding to a sewable stitch pattern are stored in a storage means, and a stitch pattern appropriately selected from the storage means is sewn based on the pattern data corresponding to the stitch pattern. In the sewing machine, a display device for displaying the selected stitch pattern; and, when the selected stitch pattern is sewn based on pattern data corresponding to the stitch pattern, a display device related to a sewing operation based on the pattern data. Display control means for switching and displaying a plurality of stages for each stitch pattern on the display device so as to identify to which part of the stitch pattern actually being sewn the sewing has progressed. A sewing machine having a display device.