JPS63150094A - Sewing machine equipped with sewing position confirming function - 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 Object of the Invention (Field of Industrial Application) The present invention relates to a sewing machine having a function of checking the sewing position and size of a stitch pattern.

(Prior art and problems to be solved by the invention) Conventionally,
For example, this type of sewing machine is
There is one described in Publication No. 6.

In this conventional sewing machine, a movement area in which the work cloth holding device does not collide with the needle is set in advance, and the lengths of the stitch pattern to be sewn in the vertical and horizontal directions are calculated, and the two are compared. The results are displayed on a display device.

However, in this conventional sewing machine, the workpiece cloth holding device is not actually operated in a free feed operation in order to check the area occupied by the seam pattern to be sewn, so it is difficult to check the size and formation position of the seam pattern. The problem is that it cannot be confirmed concretely.

This invention was made to solve the above problems, and its purpose is to adjust the size and formation position of the stitch pattern for each stitch pattern based on the relative movement of the needle and the work cloth holding device. To provide a sewing machine equipped with a sewing position confirmation function that allows confirmation of sewing positions.

Structure of the Invention (Means for Solving the Problems) In order to achieve the above object, the present invention includes a needle that moves up and down, and as the needle moves up and down, stitches are formed on the work cloth. In order to change the relative position of the work cloth holding means and the needle, any one of the seam forming means or the work cloth holding means is used. a driving means connected to one of the needles, a storage means for storing stitch pattern data consisting of a large number of relative position data indicating the relative positions of the needle and the work cloth holding means, and a calculating means for calculating the occupied range of each stitch pattern to be formed based on the stitch pattern data; and controlling the driving means based on the occupied range data calculated by the calculating means; and control means for relatively moving the needle and the work cloth holding means along the outer contour of each occupied area.

(Operation) Therefore, the calculation means calculates the occupied range for each stitch pattern formed based on the stitch pattern data, and controls based on the calculated occupied range data. The means controls the driving means to relatively move the needle and the work cloth holding means along the outline of the occupied range for each stitch pattern.

Therefore, the operator can visually check the formation position and size of each stitch pattern prior to actual sewing.

(Example) Hereinafter, an example embodying the present invention will be described in detail with reference to the drawings.

Now, as shown in FIG. 2, the sewing machine arm 1 is arranged on a table 2, and a needle bar support case 3 is supported at its front end so as to be slidable left and right. The five needle bars 4 are supported by the support case 3 so as to be movable up and down, and each has a needle 5 at its lower end. Different types (colors) of thread are supplied to each needle 5 from a thread supply source (not shown) via a thread tension device 6 and thread take-up 7 of the needle bar support case 3'J:.

A needle selection motor 8 is disposed on the sewing machine arm 1 and is drivingly connected to the needle bar support case 3. When a predetermined needle selection signal is input to the needle selection motor 8, the needle selection motor 8 slides the needle bar support case 3.
One needle 5 is selectively placed at a predetermined use position.

The sewing machine morph 9 is disposed at the rear of the sewing machine arm 1, and its power is transmitted to the needle bar 4 in the use position through a power transmission mechanism (not shown) in the sewing machine arm 1, and the needle bar 4 is moved up and down. It has become so. sewing machine bed 10
is a thread ring catcher (not shown) that is provided protrudingly on the table 2 opposite to the needle bar 4 placed in the use position, and is used to form stitches on the workpiece cloth W in cooperation with the needle bar 4. Built-in.

A pair of Y-direction moving frames 11 (only one is shown) are disposed on both left and right edges of the table 2 so as to be able to reciprocate in the Y-direction, and are driven by an X-direction drive motor (not shown).

Further, a support rod 12 is installed between both moving frames 11. The X-direction moving frame 13 is connected to the support rod 12 at its base end.
It is disposed so as to be able to reciprocate in the X direction along the axis, and is driven by an X direction drive motor (not shown). Work cloth holding frame 1
4 is attached to the X-direction moving frame 13 to detachably hold the work cloth W.

Note that the relative position between the work cloth holding frame 14 and the needle 5 is changed in synchronization with the vertical movement of the needle 5 by the Y- and X-direction moving frames 11 and 13, the support rod 12, and the Y- and X-direction drive motors. A work cloth feeding device 15 is configured as a driving means for this purpose, and a stitch pattern such as embroidery is formed on the work cloth W by relative movement between the work cloth holding frame 14 and the needle 5.

Next, the electrical configuration of the sewing machine in this embodiment will be explained with reference to FIG. Data is stored. Each stitch pattern data is stored in the needle 5 and the work cloth holding frame 14.
It is composed of a large amount of relative position data indicating the relative position with respect to the needle drop position, that is, the coordinates of the needle drop position.

A CPU (central processing unit) 21 includes a calculation means 22 and a control means 23. On the operation keyboard 24, there are a mode changeover switch 25, a pattern selection key 26, various editing keys 28 for inputting the enlargement rate of the stitch pattern and creating spaces between each stitch pattern, and starting the sewing machine. A start switch 29 for selecting the needle 5, a needle selection key 30 for selecting the needle 5, etc. are provided.

When the needle selection signal is input to the CPU 21 via the interface 31 by operating the needle selection key 30, the CPU 21 selects the interface 32 and the drive circuit 3.
3 to drive the needle selection motor 8. Further, when the mode changeover switch 25 is operated, a mode designation signal is input to the CPU 21 via the interface 31, and the CPU
U21 sets the sewing position confirmation mode or sewing mode, and when code data corresponding to various stitch patterns is input by operating the pattern selection key 26, the CPU 21 outputs the stitch pattern data corresponding to the code data to the external device. The information is read from the storage device 20 and temporarily stored in the RAM (random access memory) 27. Further, when additional information for editing such as the enlargement ratio of each stitch pattern and the space between each stitch pattern is input by operating the edit key 28, the CPU 21 stores the data in the RAM 27.

Further, when the start switch 29 is operated with the ml mode set, the control means 23 of the CPU 21 operates based on the relative position data and according to the control program stored in the ROM (read only memory) 34.
The operation of the sewing machine motor 9 and the workpiece cloth feeding device 15 is controlled via the interface 32 and each drive circuit 35, 36. Further, when the start switch 29 is operated with the sewing position confirmation mode set, the calculation means 22 of the CPU 21 calculates the divination for each stitch pattern formed based on the stitch pattern data inputted in advance. The range (usually referred to as a mask), that is, the maximum length of the stitch pattern in the X and Y directions, is calculated, and based on the calculated mask data, the CPU 21
With the sewing machine motor 9 stopped, the control means 23 of
The operation of only the workpiece cloth feeding device 15 is controlled.

Next, the operation of the sewing machine configured as described above is shown in Figure 3 (
This will be explained according to the flowcharts shown in a) to (c).

First, in step 40 shown in FIG. 3(a), when the code data corresponding to the stitch pattern 1 (11il) is input by operating the pattern selection key 26, the CPU 21 selects the code data corresponding to the code data in step 41. R the stitch pattern data
Transfer to AM27 and store. Next, in step 42, additional information such as the enlargement ratio and the space between stitch patterns is input by operating the edit key 28, and in step 43, the input data is transferred to the RAM 27 and stored.

At step 44, the CPU 21 determines whether input of the stitch pattern code data has been completed, and if the result is NO, steps 40 to 43 are repeated. Based on the above operation, rAJ, r
When the input of the stitch pattern combination consisting of Bj and rCJ is completed, the determination result in step 44 becomes YES, and the process proceeds to the next step 45.

In this step 45, it is determined whether or not the sewing position confirmation mode is designated by operating the mode changeover switch 25. If the determination result is YES, the CPU 21 sets the sewing position confirmation mode in step 46. Subsequently, in step 47, the CPU 21 turns on the start switch 2.
9, and when the start switch 29 is operated, in step 48, the stitch pattern data and additional information are read from the RAM 27, and are used to indicate the relative position of the needle 5 and the workpiece cloth feeding device 15. After converting into coordinate data for each stitch, the data is stored in another storage area of the RAM 27.

Then, in step 49, the CPU 21 calculates the maximum values in the X and Y directions of each stitch pattern from the coordinate data, and creates mask data representing the occupied range of each stitch pattern. Next, in step 50, the CPU 21 controls the sewing machine motor 9.
With the operation stopped, only the workpiece cloth feeding device 15 is operated based on the mask data and the space data in the additional information.

Next, the process proceeds to step 51, where it is determined whether or not the sewing position confirmation operation for one stitch pattern has been completed, and the process of step 50 is performed until the determination result becomes YES. Then, in step 52, it is determined whether or not the sewing position confirmation operation for all input stitch patterns has been completed, and the processes of steps 48 to 51 are repeated until the determination result becomes YES.
When S is reached, the process returns to step 45.

Regarding the above sewing position confirmation operation, rAJ shown in Fig. 4
, rBl rcJ will be described as an example. In FIGS. 4 and 5, if the coordinates of point a at the lower left corner of the mask of stitch pattern rAJ are expressed as (x, y) with respect to the sewing origin (path shown in the figure), the workpiece cloth feeding device 15 and the needle 5
The relative movement with respect to is executed in the order shown in FIG. This can be expressed as a coordinate change with the point a as the base point as follows.

(x, y) ■(x +Dlx, y) ■(x +D1x, y +D1y) ■(x,
y+01y) ■(x, y) ■(x+Dlx, y) ■(x+D1.x +51.y) ■(x +DIX +S1+D2X, )')■ (x
+Dlx +S1+D2x, y +D2y) @
(x + D1x + S1 + D2x + S2, y
+D3y) @ (x +DIX +S1+D2X +
S2, y) @ (x +DIX +SL+
D2X + S2 + D3X, y) @ (x, y) Here, DIX, D2x, D3x indicate the maximum length in the x direction of the mask of each stitch pattern, and Dly, D2y
, D3y indicates the maximum length in the Y direction, and SL
, S2 indicates the space between each stitch pattern.

Next, in step 45, if the sewing mode is designated by the mode changeover switch 25, the CPU 21 sets the sewing mode in step 53. Therefore, when the start switch 29 is operated in step 54, coordinate data for each stitch is created and stored in the RAM 27 based on the stitch pattern data and additional information in step 55, as in step 48.

Then, in step 56, the coordinate data is read out every month, and on the basis of the data, in step 57, the needle 5 and workpiece cloth feeding device 15 are operated.

In step 58, it is determined whether or not the sewing of one stitch pattern has been completed, and steps 56 and 57 are repeated until the result is YES. Then, if the determination result in step 58 is YES, step 59
Then, it is determined whether or not sewing has been completed for all stitch patterns, and the processes of steps 55 to 58 are repeatedly executed until the result becomes YES. When the result of the determination becomes YES, the needle 5 Then, the operation of the workpiece cloth feeding device 15 is stopped, and the creation of the stitch pattern is completed.

As described above, in this embodiment, the workpiece cloth feeding device 15 is moved relative to the needle 5 for each stitch pattern along the area occupied by the stitch pattern to be actually sewn. The size of the pattern and the sewing position can be visually checked concretely and reliably.

Note that this invention is not limited to the above embodiments (
It is also possible to arbitrarily change the configuration of each part without departing from the spirit of the invention, such as configuring the needle 5 to be moved relative to the work cloth holding frame 14.

Effects of the Invention As detailed above, the present invention has an excellent effect in that the size and formation position of each stitch pattern can be reliably checked for each stitch pattern prior to actual sewing.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the electrical configuration of a sewing machine embodying the present invention, Figure 2 is a perspective view of the sewing machine, and Figure 3 (a).
-(c) are flowcharts, FIG. 4 is an explanatory diagram of the stitch pattern, and FIG. 5 is an explanatory diagram of the sewing position confirmation operation of the stitch pattern. In the figure, reference numeral 5 indicates a needle (seam formation means is constituted by the above-mentioned 5, etc.), 14 a work cloth holding frame as a work cloth holding means, 15 a work cloth feeding device as a driving means, and 20
22 is an external storage device as a storage means; 22 is an arithmetic means;
23 is a control means, and W is a work cloth. Patent applicant Brother Industries, Ltd. Agent
Patent Attorney On 1) Hiroki Figure 3 (a)

Claims (1)

[Scope of Claims] 1. A stitch forming means that includes a needle (5) that moves up and down, and forms a stitch in a work cloth (W) as the needle (5) moves up and down; A work cloth holding means (14) for holding the cloth (W); and a work cloth holding means (14) for changing the relative position between the work cloth holding means (14) and the needle (5). 14) a driving means (
15), storage means (20) for storing stitch pattern data consisting of a large number of relative position data indicating the relative positions of the needle (5) and the work cloth holding means (14), and the stitch pattern data a calculation means (22) for calculating the occupied range for each stitch pattern formed based on the stitch pattern data; and the driving unit based on the occupied range data calculated by the calculation means (22). A control means (23) for controlling the means (15) and relatively moving the needle (5) and the work cloth holding means (14) along the outline of the area occupied by each stitch pattern is provided. A sewing machine equipped with a sewing position confirmation function.