JPH11137873A - Electronically controlled sewing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability and working efficiency by facilitating the scale setting (enlarging/reducing) of stitching patterns on a work to be sewn. SOLUTION: A fray tacking pattern is set in multiple scales (enlarging/ reducing)(%), and a pair of X direction magnification and Y direction are added with magnification setting numbers and memorized in a magnification memory 63a. The multiple magnification setting numbers stored in the magnification memory 63a are listed on a display, and any of magnification setting numbers can be selected by a cursor. A desired magnification (enlarging/reducing) of the fray tacking pattern is easily selected without having to select it each time, so the operability and working efficiency in selecting magnification is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronically controlled sewing apparatus for sewing various stitch patterns on a work such as trousers, and more particularly, a magnification for enlarging or reducing a stitch pattern is set and stored in advance. The present invention relates to a technique for selecting from among a plurality of types of preset magnifications.

[0002]

2. Description of the Related Art Conventionally, as an electronically controlled sewing apparatus, for example, both ends of a belt loop piece through which a belt of trousers are passed are simultaneously bar-tapped to trousers with a pair of sewing needles and a pair of thread wheel catching hooks. This needle sewing machine is in practical use. For example,
In Japanese Utility Model Laid-Open Publication No. 6-81481, two needles are provided on the needle support at the lower end of the needle bar,
A full rotary hook equipped with two hooks for catching two thread wheels corresponding to two sewing needles and transmitting the driving force of the main shaft of the sewing machine to the lower shaft, while driving both hooks for catching both thread wheels with the lower shaft. A two-needle sewing machine and a half-turn kettle type two-needle sewing machine are described.

[0003] By the way, in a cloth feeding mechanism provided in this type of two-needle sewing machine, generally, a complicated mechanism formed on a cam plate which is connected to a lower shaft for driving a thread wheel catching hook and generates a feed. The sewing object is moved by independently moving the cloth feed plate in the X direction and the Y direction perpendicular to each other by a mechanical drive system using a cam shape. That is, since the width and length of the bar-tacking are mechanically determined by the cam plate, when changing the width and length of the belt loop piece to be sewn, the size of the belt loop piece is changed. The cam plate for bar-tacking stitching, which has the optimum feed pitch, sewing width, and number of stitches, is replaced each time, which reduces operability and work efficiency.

Accordingly, the applicant of the present application has filed Japanese Patent Application No.
No. 1982, an electric motor for independently moving and driving in a perpendicular X direction and a Y direction is adopted as a cloth feed mechanism for feeding and driving a sewing object such as trousers, while a bar tacking pattern is enlarged or reduced. The magnification can be set by inputting a desired numerical value on the magnification setting screen displayed on the display, and the pattern data of the bartacking pattern is changed based on the set magnification data. A pattern stitch sewing machine has been proposed in which a cloth feed mechanism is driven by pattern data to easily and neatly sew a bar-tacking pattern having an optimum size on both ends of a belt loop piece.

[0005]

As described above, in the pattern sewing machine proposed by the applicant of the present invention in Japanese Patent Application No. Hei 8-111982, the bar-tacking pattern to be sewn is enlarged or reduced each time. A magnification setting screen is displayed on the display, and a desired numerical value is input in two or three digits for each of the “X-direction magnification” and “Y-direction magnification” items provided on the magnification setting screen. In particular, when sewing a plurality of types of belt loop pieces with different widths and lengths at random, the magnification setting operation must be performed frequently, resulting in poor operability and work efficiency. There is a problem of lowering. An object of the present invention is to improve operability and work efficiency by simplifying a magnification setting for enlarging or reducing the size of a stitch pattern to be sewn on a workpiece to be sewn.

[0006]

According to a first aspect of the present invention, there is provided an electronically controlled sewing apparatus comprising: an input means; a display means including a display; a sewing means; a cloth feeding means for feeding a workpiece to be sewn; and a control means. An electronically controlled sewing apparatus for sewing a stitch pattern while independently moving and driving a sewing needle and a workpiece in X and Y directions which are relatively perpendicular to each other based on sewing data of the stitch pattern. Magnification setting means for setting a magnification for enlarging or reducing; nonvolatile magnification storage means for storing and holding a plurality of magnifications set for one or more stitch patterns by the magnification setting means; and magnification storage means And a magnification selecting means for selecting any one of the plurality of magnifications stored in the storage section. Here, the magnification storage means may be a writable nonvolatile recording medium such as a floppy disk or a flash memory, or may be a RAM chip or a RAM card backed up by a battery.

The magnification for enlarging or reducing the stitch pattern to be sewn on the work to be sewn by the magnification setting means is, for example,
When set as a percentage (%) with respect to the basic size of the stitch pattern, the nonvolatile magnification storage means stores a plurality of magnifications set for one or more stitch patterns by the magnification setting means. Hold. Then, an arbitrary one of the plurality of magnifications stored in the magnification storage means is selected by the magnification selection means. That is, since a plurality of types of magnifications for enlarging or reducing the stitch pattern can be set in advance and stored in the magnification storage means, a desired magnification can be easily selected as necessary, and can be provided as the magnification for enlarging or reducing. Can be.

According to a second aspect of the present invention, in the electronic sewing apparatus according to the first aspect, the magnification setting means is configured to be capable of independently setting a magnification in the X direction and a magnification in the Y direction. Is what you do. In this case, the magnification for enlarging or reducing the stitch pattern can be set independently in the X direction and the Y direction. Therefore, even when the enlargement ratio in the vertical dimension and the horizontal dimension of the rectangular sewing area is different, the sewing can be performed. The size of the stitch pattern can be arbitrarily changed according to the size of the region.
Other operations are the same as those of the first aspect.

According to a third aspect of the present invention, in the electronic control type sewing apparatus according to the first or second aspect, the magnification selection means displays a plurality of magnifications read from the magnification storage means on a display of a display means, and displays the plurality of magnifications on the display means. The present invention is characterized in that a magnification is selected via a display means.
In this case, a desired magnification is selected from the plurality of magnifications read out from the magnification storage means and displayed on the display via the input means and the display means, thereby greatly simplifying the magnification selection operation. I do. Other operations are the same as those of the first or second aspect.

According to a fourth aspect of the present invention, there is provided an electronically controlled sewing apparatus according to any one of the first to third aspects, wherein the sewing data of the stitch pattern is changed so as to have a magnification selected by the magnification selecting means. A sewing data changing means for processing is provided. In this case, when the magnification is selected by the magnification selecting means, the sewing data changing means changes the sewing data so as to have the magnification. Therefore, the cloth feeding means and the sewing means are controlled by the control means based on the sewing data. The means is controlled so that the stitch pattern can be sewn to the workpiece. In addition, the same operation as any one of the first to third aspects is achieved.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, the present invention is applied to a two-needle sewing machine for simultaneously performing bar-tacking sewing on both ends of a belt loop of pants. As shown in FIGS. 1 and 2, the two-needle sewing machine 1 is provided at a substantially central portion of the work table 20 in a front-rear direction.
An operation panel 24 (see FIG. 11) having a liquid crystal display 22 and an operation unit 23 is provided upright on the right side of FIG.
3 is provided.

The sewing machine main body of the two-needle sewing machine 1 includes a bed portion 2, a pillar 3 rising from a rear end of the bed 2, an arm 4 and a head portion extending horizontally forward from an upper end of the pillar 3. And 5. A main shaft (not shown) provided in the arm portion 4 is driven by a sewing machine motor 7 composed of an induction motor, and the needle bar 8 is driven up and down via a needle bar crank mechanism (not shown). 1 for needle support 9
A pair of sewing needles 11a and 11b are attached, and the sewing needle 11b is attached to the sewing needle 11a so that the attachment position thereof can be adjusted in the front-rear direction.

The bed 2 has a bed main body 12 and a shuttle module 13 disposed at a front end of the bed 2 at a predetermined interval. A first half-rotation hook (not shown) is provided at the rear end of the hook module 13, and a second half-rotation hook (not shown) is provided at the rear end of the hook module 13. Each has a bobbin thread bobbin. Then, a lower shaft disposed on the bed portion main body 12 is reciprocally driven to rotate via a swinging mechanism connected to a main shaft driven by the sewing machine motor 7, and the first half rotary hook connected to the lower shaft. Is driven in synchronization with the vertical movement of the sewing needle 11a in the same manner as a normal sewing machine.

Basically, the shuttle module 13 is formed by unitizing a second half-turn shuttle and a shuttle drive motor 14 for driving the second half-turn shuttle independently of the main shaft. The second half-turn hook is driven by a hook drive motor 14 (see FIG. 5) that is driven synchronously with the main shaft, and the sewing needle 11b
It is configured to be able to perform bar-tacking in synchronization with the vertical movement of. Next, the cloth feed mechanism (corresponding to cloth feed means) 30 will be briefly described with reference to FIGS.

Fabric foot 31 corresponding to sewing needles 11a and 11b
a, 31b are provided, and the presser foot 31a is
, And the presser foot 31b is supported by the front end of a movable support arm 32A which is slidably engaged with the support arm 32 in the front-rear direction.
Is fixed to the connecting member 37. On the other hand, the upper surface of the bed portion 2 extending between the bed portion main body portion 12 and the shuttle module 13 is sewn on the upper surface of the bed portion 31a, 31b in cooperation with the both fabric pressers 31a, 31b including the supplied belt loop piece 53a and the work cloth such as pants. A cloth receiving plate 38 that holds an object and is driven to move independently in the X direction (left-right direction) and the Y direction (front-back direction) is provided.

The cloth receiving plate 38 is fixed to a feed operating body 39 via a holding plate 38a, and a connecting member 37 is fixed to the feed operating body 39. Therefore, the sewing operation is integrally performed with the sewing object held between the cloth receiving plate 38 and the cloth pressers 31a and 31b. Next, the XY feed mechanism 36 will be briefly described. In the case 40 provided at the base end portion of the bed body 12, a θ-axis drive motor 4 is provided.
The helical cam shaft 42 is driven by the
3 drives the helical cam shaft 44. The L-shaped swing arm 45 is pivotally attached to a support shaft 46 at the center of rotation.
The small wheel 45 a of the swing arm 45 is engaged with the spiral cam shaft 42, and the piece 45 b at the front end of the swing arm 45 is connected to the feed operating body 39.

On the other hand, the base end of the swing arm 47 is
And a small wheel 47a at an intermediate portion of the swing arm 47.
Is engaged with the helical cam shaft 44, and the piece 47 b at the left end of the swing arm 47 is connected to the feed operating body 49. The feed operating body 49 is slidably supported in the front-rear direction by a first slide unit (not shown).
Are slidably supported in the left-right direction by a second slide unit (not shown) with respect to the feed operating body 49.

Therefore, the R-axis drive motor 43 feeds and drives the feed operating body 49 mainly in the front-rear direction via the helical cam shaft 44, the swing arm 47 and the first slide unit.
The feed operating body 3 is driven by the θ-axis drive motor 41 via the spiral cam shaft 42, the swing arm 45, and the second slide unit.
9 can be driven mainly in the left-right direction and driven. However,
Strictly, the X-direction feed and the Y-direction feed are executed by both motors 41 and 43. Therefore, by controlling the rotation direction and the rotation amount of both motors 41 and 43 by the control unit 60 described later, the feed amount in the X direction or -X direction and the feed amount in the Y direction or -Y direction can be precisely adjusted. Can be controlled.

Next, the belt loop supply device 50 disposed on the work table 20 will be described with reference to FIG. However, since the belt loop supply device 50 is a general supply device, it will be briefly described. The belt loop supply device 50 basically includes a loop body feeding mechanism 51 that feeds the belt loop continuous body 53 and cuts the belt loop continuous body 53 to a predetermined length, and a cut belt loop piece 53a.
And a loop body supply mechanism 55 for transferring the pants above the pants placed on the cloth receiving plate 38.

The loop body feeding mechanism 51 includes a pillar 3
The belt loop continuum 53 is fed from a loop body supply reel 52 rotatably supported by the work table 20 and cut to a predetermined length, and delivered to the loop body supply mechanism 55. Has become. On the other hand, as shown in FIG.
A description will be given of the loop body supply mechanism 55 disposed on the front side of the fork member 1. The fork members 56 and 57 are provided opposite to the pair of cloth pressers 31a and 31b. It can be driven so that it can advance and retreat at the same time.

As shown in FIG. 4, the loop body feeding mechanism 5
1. The both ends of the belt loop piece 53a supplied from the first fork members 56a, 57
By rotating the fork members 56 and 57 outward by a predetermined angle while holding the fork members 7a, both ends of the belt loop piece 53a are bent downward, respectively, and these fork members 56 and 57 are integrally formed. It is advanced to the left and transported to a predetermined position above the pants. At this time,
The work clamps 31a and 31b are simultaneously lowered to hold the sewing object including the belt loop pieces 53a. When bar-tacking is performed, the cloth receiving plate 38 and the work clamps 31a and 31b are integrally fed in the X direction and the Y direction, and bar-tacking sewing is performed on both ends of the belt loop piece 53a. A stitch pattern N (see FIG. 7B) is simultaneously formed.

Next, an outline of a control system of the two-needle sewing machine 1 will be described with reference to a block diagram of FIG. Control unit 6
Reference numeral 0 denotes a microcomputer including a CPU 61, a ROM 62 and a RAM 63, and an input interface (not shown) and an output interface (not shown) connected to the microcomputer via a bus such as a data bus. The interface includes
A start switch 64, the operation unit 23 of the operation panel 24,
A spindle origin sensor 65 for detecting the origin position of the spindle, a first rotary encoder 66 provided on the sewing machine motor 7, and a second rotary encoder 67 provided on the shuttle drive motor 14.
Then, a signal from each of the shuttle shaft origin sensors 68 is supplied.

Further, from the output interface, a display (LCD) 22 of the operation panel 24, a drive circuit 69 for the R-axis drive motor 43, a θ-axis drive motor 41
, A drive circuit 71 for the sewing machine motor 7 and a drive circuit 72 for the shuttle drive motor 14 are supplied with drive signals and drive pulse signals. As shown in FIG. 11, a large liquid crystal display 22 is provided on the operation panel 24.
In order to switch and display various setting screens, and to input and set setting data, in addition to a numeric keypad for inputting numbers (0 to 9), a magnification for sewing the bar-tacking pattern N is selected. A magnification selection key 23a, a magnification setting key 23b for setting the magnification of the bar-tacking pattern N, a sewing start key 23c,.
An operation unit 23 (corresponding to an input unit) having a plurality of function switches such as a function switch is provided.

The spindle origin sensor 65 detects the origin position of the spindle (for example, a rotation position of 0 ° corresponding to the needle position) and outputs a spindle origin signal.
Numeral 8 detects the origin position of the second half-turn shuttle (for example, a rotation position of 0 ° corresponding to the needle position) and outputs a shuttle shaft origin signal. First rotary encoder 66
Outputs a clock pulse signal according to the rotation of the sewing machine motor 7, and the second rotary encoder 67 outputs a clock pulse signal according to the rotation of the shuttle drive motor 14.

The ROM 62 stores a plurality of types of pattern data (sewing data) for bar-tacking in association with the pattern numbers, and a control program for various controls of the two-needle sewing machine 1. A control program for pattern sewing control, which will be described later, is stored. RA
As shown in FIG. 6, M63 has data of a plurality of set magnifications (X-direction magnification data and Y-direction magnification data).
Memory 63a (corresponding to a magnification storage means) in which is stored in correspondence with the magnification setting numbers (10, 11, 12,...).
And various work memories, buffers, counters, and the like. Here, at least the magnification memory 63a is backed up by a battery, and always stores and holds its storage contents, and functions as a writable nonvolatile memory.

Here, as shown in FIG. 7 (a), for example, as shown in FIG. 7 (a), the pattern data for the bar-tack stitching includes 28 stitches from the needle position 1 to the needle position 28 where the sewing width of the bar-tack sewing is about 3 mm. Needle position data for the stitches is stored in absolute coordinates with respect to the origin position in XY coordinates with a pattern number added. Other pattern data are not shown, but are a plurality of types of pattern data having different stitch widths, stitch pitches and stitch lengths of bar-tacking stitches. Then, when the belt loop piece 53a is supplied to the cloth receiving plate 38 at the regular set position by the loop body supply mechanism 55 (see FIG. 4), as shown in FIG. Bar-tacking patterns N are respectively formed at predetermined positions on both ends.

When the bar-tack pattern N is small or large with respect to the sewing area at both ends of the belt loop piece 53a, the bar-tack pattern N is determined based on the enlargement or reduction ratio.
Is subjected to enlargement processing or reduction processing. Next, 2
A routine of the pattern sewing control executed by the control unit 60 of the main needle sewing machine 1 will be described with reference to flowcharts of FIGS. However, the reference symbol Si (i = 10,
..) Are each step.

When the power is turned on to the two-needle sewing machine 1, this control is started. First, an initialization process control for rotating the main shaft and the second half-turn shuttle provided on the shuttle module 13 to a predetermined initial position. Is executed (S10). In this control, based on the spindle origin signal from the spindle origin sensor 65, the main shaft is first moved to approximately the top dead center of the sewing needles 11a and 11b so that the sewing needles 11a and 11b do not collide with the first and second half rotary hooks. Is rotated to the corresponding rotation position, and then the shuttle drive motor 1
By driving the shuttle shaft 4, the second half-turn shuttle is rotated to the initial position corresponding to the initial position of the main shaft based on the shuttle shaft origin signal from the shuttle shaft origin sensor 68.

Next, pattern data for bar-tacking sewing of the pattern number selected by operating the numeric keypad provided on the operation section 23 of the operation panel 24 is read from the ROM 62 and stored in the work memory of the RAM 63. (S
11). Next, an initial screen for displaying on the display 22 various data necessary for the sewing work such as the length of the belt loop piece 53a supplied from the loop body supply mechanism 55 and the number of sewings is displayed (S12).

By the way, as shown in FIG. 14A, for example, since the width of the supplied belt loop piece 53a is small, the bar-tacking pattern N becomes longer and the belt loop piece 53a becomes longer.
When the stitches of the bar-tacking pattern N are sewn to be smaller than a, and the stitch width of the bar-tacking pattern N is sewn, the magnification setting key 23b of the operation unit 23 is operated so as to eliminate this inconvenience. That is, when the magnification setting key 23b is operated to set a magnification for enlarging or reducing a plurality of types of bartacking patterns N (S13 / S14: No, S15: Yes), the magnification setting processing control (see FIG. 9). Is executed (S19).

When this control is started, first, a magnification setting screen for setting a magnification for enlarging or reducing the bar-tacking pattern N is displayed on the display 22 (S25). For example, FIG.
As shown in the figure, the display 22 has three setting items “magnification setting number”, “magnification in X direction”, and “magnification in Y direction”.
And a default value of "100%" corresponding to each of the items "X-direction magnification" and "Y-direction magnification", and a mini-cursor k are displayed.

Next, a setting process for setting a set value for each setting item is executed (S26). That is, by operating the cursor movement keys of the up arrow or the down arrow, the mini-cursor k is moved to the numerical value input position of each item, and the magnification setting number is set with two digits “10”, and X (+) is set. Key 23d, X
By operating any of the (-) key 23e, the Y (+) key 23f, and the Y (-) key 23g, the magnification (%) common to a plurality of types of bar tacking patterns N is set to a default value "100%". It is set by operating the enter key 23h finally.

Next, the set values of the set items are stored as a set in the magnification memory 63a (S27), this control is terminated, and the process returns to S13 of the pattern sewing control (FIG. 8). As a result, as shown in FIG. 6, a magnification setting number “10” and an X-direction magnification “80” are stored in the magnification memory 63a.
% "And the Y-direction magnification" 110% "are stored as a set, and the magnification setting processing is repeated in the same manner as described above, whereby the magnification setting numbers" 11 "," 12 "," 13 ", and" 14 "are used. A plurality of magnification setting contents are stored. However, these multiple sets of set magnifications can be commonly applied to bar-tacking stitches of a plurality of types of pattern numbers stored in the ROM 62.

When the magnification selection key 23a is operated in the pattern sewing control (S13 / S14: Ye
s), the magnification selection control (see FIG. 10) is executed (S17). When this control is started, first, a magnification selection screen for selecting a preset magnification is displayed on the display 22 (S30). For example, as shown in FIG. 12, the display 22 displays all the magnification setting numbers “10” to “14” stored in the magnification memory 63a, and the cursor K is positioned at the first magnification setting number “10”. Is displayed.

Next, a selection process is performed in which a magnification setting number having a desired magnification is selected by pointing to it with the cursor K (S31). That is, as shown in FIG. 12, the cursor K is displayed on the magnification setting number "10" by operating the cursor movement key, and finally the selection is made by operating the enter key 23h. Next, the sewing magnification, which is the magnification of the selected magnification setting number as the magnification for sewing, is displayed on the display 22 (S32), this control is ended, and the process returns to S18 of the pattern sewing control. For example, as shown in FIG.
When the magnification setting number “10” is selected, the display 22 displays the X-direction magnification and the Y-direction magnification set by the magnification setting number “10”, respectively.

Then, in the pattern sewing control, S17
Based on the data of the magnification in the X direction and the magnification in the Y direction of the magnification setting number selected in the above, pattern data change processing is executed for changing the needle position data of the pattern data stored in the work memory by enlarging or reducing. Is stored again in the work memory (S18), and the process returns to S13. Here, in the enlargement processing or reduction processing based on the magnification data of the pattern data, it is assumed that data conversion is performed so that the bar-tacking pattern is enlarged or reduced with respect to the center in the X direction and the Y direction.

That is, the pattern data of the pattern number shown in FIG. 7A is reduced (or enlarged) by the X-direction magnification “80%” and the Y-direction magnification “110%” set by the magnification setting number “10”. When processed, it is converted to pattern data shown in FIG. When the sewing start key 23c is operated (S13: Yes, S14-S
15: No, S16: Yes), and the sewing process control is executed (S2
0), and return to S13.

In this sewing process control, drive control for synchronizing the shuttle drive motor 14 with the main shaft is executed based on the clock pulse signal from the first rotary encoder 66 and the clock pulse signal from the second rotary encoder 67. At the same time, the cloth feed mechanism 30 is fed and driven by the drive control of the motors 41 and 43, and bar-tacking is simultaneously performed on both ends of the belt loop piece 53a. Here, the magnification setting key 23b, the magnification setting control and the control unit 60
The magnification setting means is constituted by such as the magnification selection key 23a, the magnification selection control and the control unit 60 constitute the magnification selection means, and the sewing data changing means is constituted by the pattern sewing control, especially S18 and the control unit 60. I have.

Next, the operation and effect of the pattern sewing control will be described. Pattern data for bar-tacking both ends of the belt loop piece 53a is stored in the ROM 62, and a magnification setting number is assigned to the X-direction magnification (%) and the Y-direction magnification (%) by the magnification setting control. Are stored in the magnification memory 63a as a set. Then, by the magnification selection control,
When a magnification for enlarging or reducing the bar-tacking pattern N in accordance with the size of the sewing area at both ends of the belt loop piece 53a is selected by a magnification setting number, magnification data (% ), The needle position data of the pattern data is changed, the θ-axis drive motor 41 and the R-axis drive motor 43 are driven based on the changed pattern data, and the cloth feed mechanism 30 ,
The sewing target object including the belt loop piece 53a is moved and driven in the X direction and the X direction orthogonal to each other, and bar-tacking patterns N having an optimum size are formed at both ends of the belt loop piece 53a.

As described above, a plurality of types of magnifications (%) for enlarging or reducing the bar-tacking pattern N are set in advance by attaching magnification setting numbers and stored in the magnification memory 63a.
In addition, since a plurality of magnification setting numbers stored in the magnification memory 63a are displayed on the display 22, an arbitrary one is selected from the displayed magnification setting numbers. The desired magnification to be reduced can be easily selected as needed without setting each time, and the operability of the magnification setting operation and the work efficiency can be improved.

Further, since the magnification in the X direction and the magnification in the Y direction can be set independently by the magnification setting control,
Even when the enlargement ratio between the vertical dimension and the horizontal dimension of the rectangular sewing area is different, the size of the bar-tacking pattern N can be arbitrarily changed according to the size of the sewing area.
The magnification setting function can be enhanced. Further, since the plurality of magnification setting numbers read from the magnification memory 63a are displayed on the display 22 by the magnification selection control, and an arbitrary magnification setting number is selected using the cursor K, the magnification selection operation is simplified. Can be achieved.

Further, the pattern data of the bar-tacking pattern N is changed by the pattern data change control so that the X-direction magnification and the Y-direction magnification included in the magnification setting number selected by the magnification selection control. , A bar-tacking pattern N having an optimum size for the sewing area of the belt loop piece 53a.
Is obtained, and the sewing efficiency can be improved. As a modification of the above-described embodiment, in the magnification selection screen displayed on the display 22 by the magnification selection control, all the X-direction magnifications and the Y-direction magnifications stored as the magnification setting numbers are displayed in pairs, respectively. May be directly selected.

The magnification in the X direction and the magnification in the Y direction may be individually set. The pattern stitching control according to the embodiment is merely an example, and various changes can be made without departing from the technical spirit of the present invention.
In addition, various modifications may be made to the above-described embodiment based on existing technology or technology obvious to those skilled in the art. Further, the present invention is applied to an electronic control sewing machine for sewing a buttonhole sewing pattern or a zigzag sewing pattern with one sewing needle, and various electronically controlled sewing apparatuses driven and controlled by a personal computer. Of course you can.

[0044]

According to the first aspect of the present invention, a magnification setting means, a magnification storage means, and a magnification selection means are provided, and a plurality of kinds of magnifications for enlarging or reducing a stitch pattern are preset and stored. Means, and any one of a plurality of magnifications stored in the magnification storage means is selected. Selection can be made easily as needed without setting each time, and operability and operation efficiency of the magnification setting operation can be improved.

According to the second aspect of the present invention, the same effect as that of the first aspect is obtained, but the magnification setting means is configured to be able to independently set the magnification in the X direction and the magnification in the Y direction.
Even when the enlargement ratio between the vertical size and the horizontal size of the rectangular sewing area is different, the size of the stitch pattern can be arbitrarily changed according to the size of the sewing area. Enhancement can be achieved.

According to the invention of claim 3, claim 1 or 2
The same effect as described above is obtained, but the magnification selection means is configured to display the plurality of magnifications read from the magnification storage means on the display of the display means and to select the magnification via the input means and the display means. Thus, a desired magnification can be selected from among a plurality of magnifications displayed on the display, and the magnification selection operation can be simplified. According to the fourth aspect of the present invention, the same effect as in any one of the first to third aspects is obtained, but the sewing data of the stitch pattern is changed so that the magnification selected by the magnification selecting means is obtained. Since the sewing data changing means is provided, sewing data having a stitch pattern having an optimum size for the sewing area of the work to be sewn can be obtained, and the sewing efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a two-needle sewing machine according to an embodiment of the present invention.

FIG. 2 is a right side view of a sewing device including a two-needle sewing machine.

FIG. 3 is a plan view of a main part of the cloth feeding mechanism.

FIG. 4 is a partially enlarged plan view of a loop body supply mechanism.

FIG. 5 is a block diagram of a control system of the two-needle sewing machine.

FIG. 6 is a table illustrating a data structure of a magnification memory.

7A is a diagram showing pattern data of a bar-tack pattern, and FIG. 7B is a plan view of a belt loop piece obtained by sewing a bar-tack pattern having an optimum size.

FIG. 8 is a schematic flowchart of a routine of pattern sewing control.

FIG. 9 is a schematic flowchart of a routine for controlling a magnification setting process.

FIG. 10 is a schematic flowchart of a routine of magnification selection processing control.

FIG. 11 is an explanatory diagram illustrating a display example of a magnification setting screen.

FIG. 12 is an explanatory diagram illustrating a display example of a magnification selection screen.

FIG. 13 is an explanatory diagram illustrating a display example of a sewing magnification display screen.

14A is a plan view of a belt loop piece obtained by sewing a large bar-tacking pattern, and FIG. 14B is a diagram illustrating pattern data obtained by changing the original pattern data by enlarging or reducing the pattern data.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Two-needle sewing machine 7 Thin motor 22 Liquid crystal display 23 Operation part 23a Magnification selection key 23b Magnification setting key 24 Operation panel 30 Cloth feed mechanism 36 XY feed mechanism 41 θ axis drive motor 43 R axis drive motor 60 Control part 61 CPU 62 ROM 63 RAM 63a magnification memory

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Akira Nishio, Inventor, 151-1 Naeshiro-cho, Mizuho-ku, Nagoya-shi Inside Brother Industries, Ltd. Inside the company (72) Inventor Goto Nozaki 15-1 Naeshiro-cho, Mizuho-ku, Nagoya-city Inside Brother Industries, Ltd.

Claims (4)

[Claims] 1. A sewing machine comprising: input means; display means including a display; sewing means; cloth feeding means for feeding a work to be sewn; and control means. In an electronically controlled sewing device that sews a stitch pattern while independently moving and driving the stitch pattern in the X direction and the Y direction that are relatively orthogonal, magnification setting means for setting a magnification for enlarging or reducing the stitch pattern; A nonvolatile magnification storage unit that stores and holds a plurality of magnifications set for one or a plurality of stitch patterns by the magnification setting unit; and an arbitrary one of the plurality of magnifications stored in the magnification storage unit An electronically controlled sewing device comprising: 2. The image forming apparatus according to claim 1, wherein the magnification setting means includes a magnification in X direction and a magnification in Y direction.
2. The electronically controlled sewing apparatus according to claim 1, wherein a magnification in the direction can be set independently. 3. The magnification selection means is configured to display a plurality of magnifications read from a magnification storage means on a display of a display means, and to select the magnification via an input means and a display means. The electronically controlled sewing device according to claim 1 or 2, wherein the sewing device is a sewing machine. 4. A sewing data changing means for changing sewing data of a stitch pattern so as to have a magnification selected by the magnification selecting means.
The electronically controlled sewing device according to any one of items 3 to 3.