JP2762694B2 - Sewing pattern sewing method of electronically controlled pattern sewing machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sewing pattern sewing method for an electronically controlled pattern sewing machine, and more particularly, to a method of selecting a desired sewing pattern from a plurality of sewing patterns by setting a holding frame to a mechanical origin. The present invention relates to a device that directly moves to a first needle position without going through.

(Prior art)

Generally, in an electronically controlled pattern stitch sewing machine used in a sewing factory or the like, a holding frame for holding a work cloth is placed on a table by X
An X-direction drive mechanism and a Y-direction drive mechanism for moving the actuator in the two directions of the axis and the Y axis, respectively, and data of a plurality of sewing patterns are stored in a nonvolatile memory such as a floppy disk or a ROM in advance. Based on the data of the desired sewing pattern selected and set from the memory, the holding frame is sequentially controlled to move in two directions of the X axis and the Y axis so that the sewing pattern can be sewn on the work cloth.

In this type of pattern sewing machine, the data of a plurality of sewing patterns are stored in these memories for each sewing pattern number.
Since the needle position is stored based on the mechanical origin of the holding frame, every time the sewing pattern is changed, it is necessary to read out the sewing pattern data and move the holding frame to the mechanical origin once. There is a problem that the work efficiency when changing is poor.

On the other hand, as data of a plurality of sewing patterns, the first needle position data based on the machine origin and the i-th needle position (i = 1, 2,...) For the first sewing pattern are referred to as ( i + 1) Needle position data is stored, and the second and subsequent jth (j = 2, 3,...) sewing patterns are determined based on the final needle position of the (j-1) th sewing pattern. There is also known one that stores first needle position data and (i + 1) th needle position data based on the i-th needle position. Even when such a sewing pattern data structure is used, the first stitch position of the j-th sewing pattern with respect to the mechanical origin is calculated using the data of the first to j-th sewing patterns, and the above-mentioned sewing pattern is calculated. As in the case of the data structure, a method is employed in which the holding frame is moved to the mechanical origin at the start of sewing of the j-th sewing pattern.

[Problems to be solved by the invention]

As described above, in the pattern sewing machine provided with a plurality of sewing pattern data, when the sewing pattern is selected, the holding frame is temporarily moved to the mechanical origin, and then is moved to the first needle position obtained by this calculation. Since the control is performed, an extra time for moving the holding frame is required at the time of selecting and setting a sewing pattern, and there is a problem that work efficiency is poor.

SUMMARY OF THE INVENTION It is an object of the present invention to sew a sewing pattern of an electronically controlled pattern stitch sewing machine that can quickly move a holding frame to a first stitch position when a sewing pattern is changed and selected and set, thereby greatly improving work efficiency. It is to provide a method.

[Means for solving the problem]

According to a first aspect of the present invention, there is provided a sewing pattern sewing method for an electronically controlled pattern stitch sewing machine, comprising: holding a work cloth in a holding frame movable in two orthogonal directions in the electronically controlled pattern stitch sewing machine; In the method of selectively reading the sewing pattern data for each sewing pattern and performing sewing, the first needle position data and the i-th needle position based on the mechanical origin for the first sewing pattern as the plurality of sewing patterns. (I + 1) -th needle position data based on (i = 1, 2,...) And (j + 1) -th sewing pattern (j = 2, 3,...) Of the second and subsequent sewing patterns -1) The j-th sewing pattern is selected and set using the first needle position data based on an arbitrary needle position of the first sewing pattern and the (i + 1) th needle position data based on the i-th needle position. When The first needle position of the j-th sewing pattern based on the machine origin is obtained based on the data of the first to j-th sewing patterns, and based on the first needle position and the current position of the holding frame. The holding frame is moved so that the first needle position matches a needle drop position having a predetermined positional relationship with respect to the mechanical origin.

According to a second aspect of the present invention, there is provided a sewing pattern sewing method for an electronically controlled pattern stitch sewing machine, comprising: holding a work cloth in a holding frame movable in two orthogonal directions in the electronically controlled pattern stitch sewing machine; In the method of selectively reading the sewing pattern data for each sewing pattern and performing sewing, the j-th (j
= 1, 2,...), The first needle position data and the i-th needle position (i = 1,
When the j-th sewing pattern is selected and set using the (i + 1) -th needle position data based on (2,...), The first stitch position of the j-th sewing pattern based on the machine origin is determined. The holding frame is moved based on the reading, the first stitch position and the current position of the holding frame such that the first stitch position matches a needle drop position having a predetermined positional relationship with respect to the machine origin.

[Action]

In the sewing pattern sewing method for an electronically controlled pattern stitch sewing machine according to the first aspect, as the plurality of sewing patterns to be sewn on a work cloth, first needle position data based on a mechanical origin relating to the first sewing pattern and (I + 1) -th needle position data based on the i-th needle position (i = 1, 2,...) And j-th (j = 2, 3,...)
The first needle position data based on an arbitrary needle position of the (j-1) th sewing pattern and the (i + 1) th needle position data based on the i-th needle position regarding the sewing pattern of (.)) Are used. Therefore, when the j-th sewing pattern is selected and set, first, as shown in FIG. 6 according to the embodiment, based on the data of the first to j-th sewing patterns,
From the first needle position data of each sewing pattern from the first sewing pattern to the (j-1) th sewing pattern to arbitrary needle position data and the first sewing pattern of the first sewing pattern.
By summing up the needle position data, the first needle position B of the j-th sewing pattern based on the mechanical origin O is obtained.

Next, the mechanical origin O, the first stylus position B, and the current position A of the holding frame 12 are represented by vectors as indicated by arrows, and the first stylus position is added to a vector VA from the mechanical origin O toward the first stylus position A. When a vector I from A to the first needle position B is added, a vector VB from the mechanical origin O to the first needle position B is obtained, and the vector I is obtained by subtracting the vector VA from the vector VB. Then, based on the vector I, that is, the movement amount, the holding frame 12 is moved so that the first needle position B matches the needle drop position having a predetermined positional relationship with the mechanical origin O.

Thus, when the sewing pattern is changed and selected and set, the holding frame can be directly moved to the first stitch position without passing through the mechanical origin.

In the sewing pattern sewing method for an electronically controlled pattern sewing machine according to the second aspect, as the data of the plurality of sewing patterns, a machine origin related to a j-th (j = 1, 2,...) Sewing pattern is used as a reference. Since the first needle position data and the (i + 1) th needle position data based on the i-th needle position (i = 1, 2,...) Are used, when the j-th sewing pattern is selected and set, First, the first needle position data based on the j-th mechanical origin is read.

Next, as shown in FIG.
, The first needle position, and the current position B of the holding frame 12,
In the same manner as in the claims, the vector I, that is, the moving amount of the holding frame 12 is obtained. Then, based on the vector I, that is, the movement amount, the holding frame 12 is moved so that the first needle position B matches the needle drop position having a predetermined positional relationship with the mechanical origin O.

Thus, when the sewing pattern is changed and selected and set, the holding frame can be directly moved to the first stitch position without passing through the mechanical origin.

〔The invention's effect〕

According to the sewing pattern sewing method of the electronically controlled pattern sewing machine according to the first aspect, when the sewing pattern is changed and selected and set, as described in the section of [Action], the current position of the holding frame and the selected position are selected. The moving amount of the holding frame is obtained from the first needle position of the sewing pattern thus obtained, and the holding frame is moved without passing through the mechanical origin so that the first needle position matches the needle drop position based on the moving amount. The time required to move the holding frame when selecting and setting the sewing pattern can be reduced to the required minimum time.
Work efficiency can be greatly improved.

According to the sewing pattern sewing method of the electronically controlled pattern stitch sewing machine according to the second aspect, the same effect as in the first aspect can be obtained as described in the section of [Action].

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present embodiment is an example in which the present invention is applied to a general industrial electronic control type pattern stitch sewing machine (hereinafter, referred to as a sewing machine).

As shown in FIG. 1, a sewing machine main body 5 having a bed 2, a pillar 3 and an arm 4 is provided on a sewing machine frame 1 of the sewing machine M. A table 6 is provided at the front end of the bed 2, and a feed plate 7, which is moved and driven independently in two directions of X-axis and Y-axis orthogonal to each other and is position-controlled, is provided on the table 6. The presser device for holding the work cloth on the presser 7 includes a presser arm 8, a presser foot 9 attached to the presser arm 8, and a presser frame 10 detachably mounted on the presser foot 9.
And a presser plate 11 detachably attached to the lower surface of the presser frame 10. The rear end of the presser arm 8 is fixed to a movable member fixed to the feed plate 7, and the presser arm 8 is connected to the presser foot 9. The holding frame 12 including the holding frame 10, the holding plate 11, and the feed plate 7 is integrally moved in the X direction by an X-direction driving stepping motor 25, and is moved and driven in the Y direction by a Y-direction driving stepping motor 26. (See FIG. 2). Then, with the work cloth W sandwiched between the presser plate 11 and the feed plate 7,
13 and the sewing needle 14 at the lower end thereof are reciprocated up and down, and the positions of the holding frame 12 in the two directions of the X-axis and the Y-axis are controlled based on the cloth feed data of the selected sewing pattern. The sewing pattern is automatically sewn.

The sewing machine M further includes a start / stop switch 20 for instructing start / stop of a sewing operation, a sewing pattern selection switch 21 including a numeric keypad for selecting a desired sewing pattern,
A floppy disk drive FD for reading data of a plurality of sewing patterns stored in the floppy disk F is provided.

Next, the control system of the sewing machine M is configured as shown in the block diagram of FIG.

The sewing machine motor 24 and the stepping motors 25 and 26 are connected to the floppy disk drive FD, the timing signal generator 30, the switches 20 and 21, the X-direction origin detection switch 22, and the Y-direction origin detection switch via the respective drive circuits 27 to 29. 23 is
Each is connected to the input / output interface 31 of the control device C. When the holding frame 12 is in the second
As shown in the figure, a detection signal of "L" level is output on the left side of the center position in the X direction with respect to the table 6, and an "H" level detection signal is output on the right side of the center position. Furthermore, Y
The direction origin detection switch 23 outputs an "L" level detection signal below the center position in the Y direction with respect to the table 6, and outputs an "H" level detection signal above the center position. That is, the holding frame 12 moves to the center position in the X direction and the Y direction, and the detection signals from the two detection switches 22 and 23 change from “H” level to “L” level or from “L” level to “H” level, respectively. The switching position is the mechanical origin O of the holding frame 12.
Is set to This mechanical origin O is set as the origin position of the XY coordinates with respect to the table 6. Therefore, when the holding frame 12 moves to the mechanical origin O, the needle drop position is the center position of the holding frame 12.

Briefly describing the timing signal generator 30,
An opening is formed in a disk-shaped disk fixed to an upper shaft (not shown) driven by the sewing machine motor 24. The opening is formed by a sensor, and a cloth feed timing signal is output at a cloth feed timing. I do.

The floppy disk drive FD reads a plurality of sewing pattern data stored in a detachably mounted floppy disk F,
Output to

As shown in FIGS. 3 and 4, the floppy disk F includes data of a first sewing pattern, data of a second sewing pattern, and data of a third sewing pattern as data of a plurality of sewing patterns. Pattern data,..., J-th sewing pattern data are stored in this order. As shown in FIG. 4, the data of each sewing pattern is composed of a large number of sewing data (needle position data) of 2 bytes. The first one byte includes Y-direction data (1 bit) indicating the movement direction in the Y direction, X-direction data (1 bit) indicating the movement direction in the X direction, and X
Direction cloth feed data Sx (Px1, Px2,
.. Qx1,...), And the next one byte is used to instruct the drive of the sewing machine motor 24 to execute sewing [1, 1] or to instruct the end of sewing of each sewing pattern. Command the stop of the driving of the sewing machine motor 24 [0,
0] drive data (2 bits), cloth feed data in the Y direction
Sy (Py1, Py2,... Qy1,... Consisting of 6 bits)
It is composed of That is, the plurality of pattern data include cloth feed data Sx and Sy in both the X and Y directions with respect to the mechanical origin O for the first sewing pattern, that is, the first stitch position data and the i-th stitch position (i = 1). (I + 1) -th needle position data based on (2,...) And the (j−1) -th sewing pattern of the second and subsequent j-th (j = 2, 3,...) Sewing patterns The first needle position data based on the last needle position of the sewing pattern and the (i + 1) th needle position data based on the i-th needle position are stored. When the drive data is [0, 0], the cloth feed data in both the X and Y directions is “0”.

The control device C includes a CPU 33 and a bus such as a data bus.
I / O interface 31, ROM3 connected via 32
4 and a RAM 40.

The ROM 34 stores a program for controlling the sewing machine motor 24 based on a start signal and a stop signal output from the start / stop switch 20, a control program for sewing pattern sewing control, and the like.

The sewing pattern data memory 41 of the RAM 40 reads and stores all data of a plurality of sewing patterns stored in the floppy disk F in advance.

The pattern number memory 42 stores the pattern number of the currently set sewing pattern.

The first first needle position data memory 43 stores data of the first needle position A (Ax, Ay) of the sewing pattern currently sewn.

The data of the first needle position B (Bx, By) of the newly selected sewing pattern is stored in the second first needle position data memory 44.

The movement amount data memory 45 stores movement amount data I (Ix, Iy) for moving the holding frame 12 from the current sewing position to the first stitch position of the newly selected sewing pattern.

The current position data memory 46 has a holding frame during sewing.
The current position G (G) based on the twelve first needle positions A (Ax, Ay)
x, Gy) is stored.

The flag memory 47 stores flag data of an origin detection flag F which is set (data is “1”) when the origin detection of the holding frame 12 is executed.

As shown in FIG. 3, the sewing pattern data memory 41 reads and stores all data of a plurality of sewing patterns stored in the floppy disk F.

Next, a routine of sewing pattern sewing control performed by the control device C of the sewing machine M will be described with reference to the flowchart of FIG. In the figure, Si (i = 1, 2, 3,...)
・) Is each step.

When the power is turned on, this control is started, initial setting is first executed (S1), data of all sewing patterns stored in the floppy disk F is read out, and this data is stored in the sewing pattern data memory 41. (S2),
The pattern number of the sewing pattern set by the sewing pattern selection switch 21 is read and temporarily stored in a predetermined memory of the RAM 40 (S3). When the start / stop switch 20 is turned on (S4: Yes), and when the origin detection flag F is reset immediately after the power is turned on (S5: N
o), based on the detection signals from both origin detecting switches 22 and 23, drive both stepping motors 25 and 26 to move the holding frame 12 to the mechanical origin O shown in FIG. 2 (S6), and move the first stitch position “0” is stored in A (Ax, Ay) and “0” is also stored in the current position G (Gx, Gy) (S7), the flag F is set (S8), and the process returns to S3.

When the start / stop switch 20 is turned on again, the flag F
Is set (S4, S5: Yes), when the number data in the pattern number memory 42 does not match the temporarily stored newly set pattern number, that is, the sewing pattern number is changed and selected and set. (S9: Ye
s) The newly set pattern number (j) is stored in the pattern number memory 42 (S10), and the sewing corresponding to the sewing pattern number (j) selected and set based on the data in the sewing pattern data memory 41. 1st needle position B of pattern
(Bx, By) is obtained by calculation (S11). That is, the first needle position B (Bx, By) based on the mechanical origin O of the selected j-th sewing pattern is determined by referring to the drive data [0, 0]. ... Rx1 + Rx2 + ...
.. + By the Py1 + Py2 +... Qy1 + Qy2 +... Ry1 + Ry2 +...
+ Determined from the first stitch position of the j-th sewing pattern.

Next, the movement amount I (Ix, Iy) of the holding frame 12 is calculated (S12). That is, as described later, the first needle position data of the sewing pattern immediately before newly selected as the current position of the holding frame 12, that is, the first needle position A (Ax, Ay) is stored. As shown in the figure, three positions are represented by vectors as indicated by arrows, and the mechanical origin O
Is added to the vector VA from the first needle position A to the first needle position B to the vector VA toward the first needle position A, a vector VB from the mechanical origin O to the first needle position B is obtained, and the vector I is a vector It is obtained by subtracting the vector VA from VB. Then, the obtained movement amount I (Ix, I
Based on y), the holding frame 12 is moved so that the first needle position B matches the needle drop position, that is, the mechanical origin O (S13), and the first needle position B (Bx of the selected j-th sewing pattern). , B
y) The data is stored as the first needle position A (Ax, Ay) data (S14). Therefore, when a sewing pattern is newly selected, the holding frame 12 directly moves to the first stitch position of the selected sewing pattern without passing through the mechanical origin O.

Next, at the cloth feed timing (S15: Yes), the next sewing data S (Sx, Sy) is read (S16), and when the drive data is [1, 1] and not a stop command (S17: No),
The holding frame 12 is moved based on the sewing data S (Sx, Sy) (S
18), the current sewing data of the holding frame 12 is added to the current position G (Gx, Gy) (S19), and the process returns to S16.

On the other hand, when the readout sewing data includes the stop command (S17: Yes), the driving of the sewing machine motor 24 is stopped (S20), and the holding frame 12 is moved to the first position based on the current position G (Gx, Gy). It is moved to the needle position A (Ax, Ay) (S21) and the current position G
“0” is stored in (Gx, Gy) (S22), and the process returns to S2.

If the sewing pattern number is not changed when the sewing of the sewing pattern is started (S9: No), S15 to S2
2 is executed. Therefore, also in this case, the sewing of the holding frame 12 is started immediately from the first needle position A without passing through the mechanical origin O.

Therefore, when the sewing pattern is changed and selected and set, the holding frame 12 is determined based on the moving amount I obtained from the current position A of the holding frame 12 and the first needle position B of the selected sewing pattern.
Is moved to the first needle position B without passing through the mechanical origin O, so that the moving time of the holding frame 12 at the time of selecting and setting the sewing pattern can be reduced to a necessary minimum time, and the working efficiency can be greatly improved. .

The data of the plurality of sewing patterns stored on the floppy disk F includes first stitch position data based on the mechanical origin of the first sewing pattern and i-th sewing pattern.
(I +) based on the needle position (i = 1, 2,...)
1) Needle position data and the second and subsequent j-th (j =
(2-1, 3) (j-1) regarding the sewing pattern
In the case where it is composed of the first needle position data based on an arbitrary needle position other than the last needle position of the sewing pattern and the (i + 1) th needle position data based on the i-th needle position, the sewing is performed. In S11 of the pattern sewing control, the first needle position B based on the mechanical origin O of the selected j-th sewing pattern is shifted from the first sewing pattern to the (j-
1) From the first needle position data of each sewing pattern up to the first sewing pattern to any desired needle position data, the first needle position data of the j-th sewing pattern may be obtained by total addition. .

The data of a plurality of sewing patterns stored in the floppy disk F is a j-th data (j = 2,...).
・ The 1st sewing machine pattern based on the machine origin
If it is composed of the needle position data and the (i + 1) th needle position data based on the i-th needle position (i = 1, 2,...), S1 to S10 are executed in the sewing pattern sewing control. After that, in S11, the first stitch position B of the sewing pattern corresponding to the sewing pattern number (j) selected and set with reference to the mechanical origin O may be read, and S12 and subsequent steps may be executed.

The present invention can be applied to various electronically controlled pattern sewing machines, such as a sewing machine in which sewing pattern data is stored in a ROM or the like, and a machine in which the mechanical origin O is not set at the center position of the holding frame 12. Of course.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a perspective view of an electronically controlled pattern stitch sewing machine, FIG. 2 is a block diagram of a control system of the sewing machine, and FIG. 3 and FIG. FIG. 5 is a schematic flowchart of a sewing pattern sewing control routine, and FIG. 6 is a diagram illustrating a theory of directly moving a holding frame to a first needle position of a newly selected sewing pattern. FIG. M: electronically controlled pattern stitch sewing machine, 5: sewing machine body,
12 ... holding frame, 33 ... CPU, 34 ... ROM, 40 ... RAM, 41
… Sewing pattern data memory, 43/44… first stitch position coordinate data memory, 45… moving amount data memory, 46…
Current position coordinate data memory, C: control device, FD: floppy disk drive device.

Claims (2)

(57) [Claims] 1. An orthogonal 2 in an electronically controlled pattern stitch sewing machine.
In a method of holding a work cloth in a holding frame movable in a direction and selectively reading data of a plurality of sewing patterns stored in advance for each sewing pattern and sewing, the data of the plurality of sewing patterns are as follows. The first needle position data based on the mechanical origin of the first sewing pattern, the (i + 1) th needle position data based on the i-th needle position (i = 1, 2,...), And the second The first needle position data and the i-th needle position based on an arbitrary needle position of the (j-1) th sewing pattern for the jth sewing pattern (j = 2, 3,...) When the j-th sewing pattern is selected and set using the (i + 1) -th needle position data as a reference, the first
A first stitch position of the j-th sewing pattern based on the machine origin based on the data of the second to j-th sewing patterns; and determining the first stitch position based on the first stitch position and the current position of the holding frame. 1
A sewing pattern sewing method for an electronically controlled pattern sewing machine, wherein the holding frame is moved so that a needle position matches a needle drop position having a predetermined positional relationship with respect to a machine origin. 2. An orthogonal 2 in an electronically controlled pattern stitch sewing machine.
In a method of holding a work cloth in a holding frame movable in a direction and selectively reading data of a plurality of sewing patterns stored in advance for each sewing pattern and sewing, the data of the plurality of sewing patterns are as follows. J-th (j
= 1, 2,...), The first needle position data and the i-th needle position (i = 1,
When the j-th sewing pattern is selected and set using the (i + 1) -th needle position data based on (2,...), The first needle position of the j-th sewing pattern based on the machine origin is determined. Reading out the first stitch position based on the first stitch position and the current position of the holding frame.
A sewing pattern sewing method for an electronically controlled pattern sewing machine, wherein the holding frame is moved so that a needle position matches a needle drop position having a predetermined positional relationship with respect to a machine origin.