JP2777314B2 - Control device for automatic sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an automatic sewing machine which forms stitches by controlling the driving of a cloth presser holding a workpiece.

[0002]

2. Description of the Related Art FIG. 6 is a perspective view showing the appearance of a conventional general automatic sewing machine. In this figure, 3 is a sewing machine table, 1 is a sewing machine head, and 2 is a X included in the sewing machine head 1. A Y drive unit, 4 a cloth presser for holding a workpiece, 5 a floppy disk drive for inputting a sewing pattern, 6 a control device for controlling the sewing machine head 1, and 7 a leg for supporting the entire sewing machine.

FIG. 7 is a block diagram showing a control circuit of the above-mentioned conventional automatic sewing machine. In FIG. 7, reference numeral 11 denotes a CPU for controlling, 12 denotes a ROM which is a nonvolatile memory,
3 is a RAM which is a readable and writable memory, 14 is an input / output device for exchanging signals with the sewing machine head, 17 is a signal line for driving a solenoid or a stepping motor on the sewing machine head, 16 is a detector or the like. This is an input signal.

FIG. 8 is a view showing an example of conventional conventional sewing. Reference numeral 20 denotes a body, and reference numeral 21 denotes a sewing product such as a label to be sewn on the body 20. The part γ indicates actual sewing, and the part ε indicates a later-described idle feed. W indicates the length of the idle feeding.

[0005] The conventional device is constructed as described above, and its operation will be described below. CPU11 is RO
Read data in M12 and use RAM 13
Various operations are executed, and an operation to be executed is instructed to the sewing machine head 1 through the input / output device 14. Since the detailed operations in FIGS. 6 and 7 are described in Japanese Patent Application Laid-Open No. Hei 3-205093, the detailed description is omitted here, and the sewing operation in FIG. 8A will be described.

A body 20 to which a label or the like can be sewn and a sewn product 21 such as a label are held by a presser of an automatic sewing machine. Next, by inputting a sewing start command (not shown) to the control device 6 of the sewing machine, the automatic sewing machine executes the determined sewing pattern, performs the actual sewing in the γ section, and the empty feed (the empty Feeding refers to an operation of moving the presser without moving the needle bar up and down), and further performs actual sewing of the ε portion. In FIG. 8b,
The sewing state of the automatic sewing machine when the size of the sewing product 21 such as a label varies is shown. As described above, the automatic sewing machine sew a position deviated from a sewing product such as a label as shown in FIG. 8B to execute a predetermined sewing pattern.

Therefore, in the case of a sewing product such as a label having a different size, a process such as setting a different sewing pattern in advance is dealt with. It is a situation that cannot be handled.

[0008]

Since the conventional automatic sewing machine is configured as described above, if the size of a sewing product such as a label is changed, the sewing pattern must be changed. If the size of the sewn items such as labels is slightly different one by one, it is practically impossible to change the sewn pattern. There is a problem that sewing cannot be performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a control device for an automatic sewing machine which beautifully sews the end of a sewn product even when the sewn product such as a label varies. The purpose is to provide.

[0010]

A control device for an automatic sewing machine according to a first aspect of the present invention includes a sewing machine and a main shaft of the sewing machine.
A motor to be driven, a presser foot device
Of the presser foot independently in the X and Y directions orthogonal to each other
A two-axis drive mechanism to be moved;
To move the presser foot to a predetermined position.
Drive control means, and the motor and drive control means, etc.
A control device that controls the overall operation of the
Storage means for storing gram and sewing pattern data, etc.
In the control device for an automatic sewing machine provided with the sewing machine,
Cloth edge detecting means for detecting the edge of the
At least the actual sewn part constituting the seam and the seam
There is an idle feed portion that sends the sewing product without configuring,
When executing the idle feeding portion, the cloth edge detecting means
By detecting the end of the sewing material,
Means to skip to the next actual sewing part without executing data
The sewing is performed from the actual sewing portion which is skipped by the skipping means.
Execution means for sewing a product .

A control device for an automatic sewing machine according to a second aspect of the present invention includes a sewing machine and a motor for driving a main shaft of the sewing machine.
And a presser device for holding the sewing product, and the presser device
Two axes that move independently in X and Y directions orthogonal to each other
By controlling the drive mechanism and the two-axis drive mechanism.
Drive control means for moving the presser foot device to a predetermined position
And the operation of each part such as the motor and drive control means
Control device to control, programs and sewing required for control
Automatic sewing provided with storage means for storing pattern data, etc.
In the control device of the sewing machine, the sewing product is sewn.
Sometimes, the cloth edge detecting means detects the end of the sewing product.
By performing the above, the sewing is performed without executing some of the actual sewing data.
Sewing pattern data until the next inflection point in the pattern data
A skipping means, and an inflection point skipped by the skipping means.
The actual sewing part from the first actual sewing part that has passed
Line means .

[0012] Control apparatus for an automatic sewing machine according to the third invention, prior to sewing the sewing material, in which a retracting means for retracting the fabric edge detecting means from the actual sewing portion.

[0013]

[Action] control apparatus for an automatic sewing machine according to the first invention, during air feed, by Rukoto is inputted detection signal from the fabric edge detecting means for detecting the end of the workpiece, executes the idle feeding data after Without skipping to the next actual sewing area.
Execute sewing from the part made of.

The control apparatus for an automatic sewing machine according to the second invention, from the fabric edge detecting means for detecting the end of the sewing material in a solid sewing by Rukoto inputted cloth end detection signal, the actual sewing data after Without executing a part , the sewing pattern data
Skip to the next inflection point, first sewing on the skipped inflection point
Execute sewing from the part made of.

A control device for an automatic sewing machine according to a third aspect of the present invention controls the cloth edge detecting means to retract from the actual sewing portion before performing sewing .

[0016]

【Example】

Embodiment 1 FIG. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the external shape of an automatic sewing machine according to an embodiment of the present invention. In FIG. 1, reference numeral 8 denotes a reflection type sensor for detecting a cloth edge, 9 denotes a reflection plate for the reflection type sensor, and 10 denotes a cylinder for operating the reflection plate 9.

FIG. 2 is a detailed view of a holding portion constituting a main part of the present invention, and the same portions as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 3 is a block diagram of a control unit according to the present invention.
The description is omitted. Reference numeral 15 denotes an output signal line of the reflection type sensor for detecting the cloth edge.

FIGS. 4A and 4B are views showing a sewing state at the time of idle feeding. 9 is a reflection plate of a reflection type sensor, and 18a is a body for sewing a sewing product 18b such as a label (hereinafter referred to as a label). .

FIGS. 5A and 5B are views showing a sewing state at the time of actual sewing.

Next, the operation of the automatic sewing machine configured as described above will be described. Since the general operation of the automatic sewing machine is the same as that of the conventional device, only different portions will be described here. The sewing patterns α1, α2, α3 shown in FIG. 4 have been input to the automatic sewing machine in advance. The automatic sewing machine is provided with a body 18 shown in FIG.
a and a presser (not shown in FIG. 4) for holding the label 18b in the directions of + X, -X, + Y, and -Y in the drawing.
Move the sewing material and form the seam. Here, the α1 portion and the α3 portion are actual sewing portions, and the α2 portion is an idle feeding portion. First, the body 18a and the label 18b are set at fixed positions. At this time, the right end of the label is set at a fixed position (on the dashed line indicated by K). When the automatic sewing machine is started after setting, the presser sequentially moves the α1 actual sewing section and executes actual sewing.

Next, when the point A is reached, only the presser is moved without performing actual sewing, and the idle feed is executed in the direction of the point B. When the cloth end sensor signal shown in FIG. 3 changes from 1 to 0 at the point B, the input / output device 14 recognizes that the cloth end has come and transmits the information to the CPU 11. I do. The CPU 11 uses the cloth edge sensor input signal to
Control is performed such that the jumping from point C to point C is skipped, and actual sewing from point C to point A is executed, and actual sewing from point C to point D is executed. Therefore, the idle feed in the actual input pattern is α2
In the actual sewing state, β for the distance from point A to point C
(Distance from point A to point B), and the idle feeding ends at point B. When the actual sewing is performed from the point C, if the sensor reflector 9 is located at the position shown in FIG. 4A, the needle of the sewing machine collides with the sensor reflector 9. To avoid this, the cylinder 10 is controlled as shown in FIG.
CP to retract the sensor reflector 9 from the actual sewing portion
U11 controls the sewing machine.

Next, FIG. 5 will be described. The sewing patterns a1 and a2 shown in FIG. 5 have been input to the automatic sewing machine in advance. Further, the sewing machine is moved in the directions of + X, -X, + Y, and -Y by a presser (not shown in FIG. 5) for holding the body 18a and the label 18b shown in FIG. Form.

Here, the portions a1 and a2 are all actual sewing portions. First, the body 18a and the label 18b are set at fixed positions. At this time, the right end of the label is set at a fixed position (two-dot chain line indicated by K). After setting, start the automatic sewing machine.
Move the actual sewing section 1 in order and execute the actual sewing. next,
At the point E, the cloth edge sensor signal shown in FIG. 3 changes from 1 to 0 by the cloth edge sensor, so that the input / output device 14 recognizes that the cloth edge has come, and transmits the information to the CPU 11. I do. When the sensor reflector 9 is located at the position shown in FIG.
When the sewing from the point E to the point F is performed, the needle of the sewing machine collides with the sensor plate 9. In order to avoid this, as shown in FIG. 5B, the CPU 11 controls the sewing machine so as to retract the sensor reflector 9 from the actual sewing portion by controlling the cylinder 10, and further executes the sewing from the point E to the point F. Further, after inputting the cloth edge sensor, after sewing several stitches (between point E and point F), sewing from point F to point G is skipped, and the sewing data a2 from point G to point H of the original data is replaced by F The actual sewing is performed at the points H and H '. Here, as means for skipping the actual sewing portion at the points F and G, there is a means for calculating the sewing direction of each stitch, finding an inflection point, and finding the point G.

Embodiment 2 FIG. Although the reflection type sensor is used as the cloth edge sensor in the above embodiment, it goes without saying that a transmission type sensor, a cloth thickness sensor, or the like may be used. Furthermore, in the embodiment, an example has been described in which the sewing is performed while being aligned with the cloth edge. However, it is needless to say that the sewing machine may be used for positioning a sewing pattern in a sewing product. Further, in the embodiment, by arranging one sensor as shown in FIG. 5, it was possible to match the sewing of one corner, but for a square sewing product like a label, By arranging sensors,
It goes without saying that the entire periphery of the label can be sewn.

[0026]

As it is evident from the foregoing description, according to the first aspect, with respect to existing sewing field <br/> variability, using the same stitching pattern, a certain portion from the two sides of the workpiece Sewing can be performed, the operation can be more easily performed, and a more stable sewing finish can be obtained.

According to the second invention, with respect to existing sewing field variability, using the same stitching pattern, at least 2
A fixed portion can be sewn from the side, so that the work can be performed more easily and a stable sewing finish can be obtained.

According to the third aspect of the present invention, since the retracting means for retracting the cloth edge detecting means is provided, the sewing machine needle can detect the cloth edge.
It is possible to prevent collision with the intellectual means .

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an external view showing a cloth presser and a sensor reflector driving portion according to an embodiment of the present invention.

FIG. 3 is a block diagram showing a control circuit according to one embodiment of the present invention.

FIG. 4 is a diagram showing a sewing state according to an embodiment of the present invention.

FIG. 5 is a diagram showing a sewing state according to an embodiment of the present invention.

FIG. 6 is a perspective view of a conventional automatic sewing machine.

FIG. 7 is a block diagram showing a control circuit of a conventional automatic sewing machine.

FIG. 8 is a diagram showing a conventional sewing situation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sewing machine head 2 XY drive part 3 Sewing machine table 4 Work clamp 5 Floppy disk device 6 Control device 7 Leg 8 Reflective sensor 9 Reflective plate for reflective sensor 10 Cylinder

Continuation of the front page (72) Inventor Saburo Hatanaka 3-2-2, Uehonmachi Nishi, Chuo-ku, Osaka-shi, Osaka Ono Industry Co., Ltd. (56) References JP-A-4-97775 (JP, A) JP-A Sho 59-105489 (JP, A) JP 4-55720 (JP, B2) (58) Field surveyed (Int. Cl. ⁶ , DB name) D05B 1/00-83/00

Claims (3)

(57) [Claims] 1. A sewing machine, a motor for driving a main shaft of the sewing machine, a cloth presser for clamping a sewing product, and a biaxial drive mechanism for independently moving the cloth presser in X and Y directions orthogonal to each other. A drive control means for controlling the drive of the two-axis drive mechanism to move the presser foot device to a predetermined position; a control device for controlling overall operations of the motor and the drive control means; In a control device for an automatic sewing machine, comprising a storage means for storing a program, sewing pattern data, and the like, a cloth end detecting means for detecting an end of the sewing product ; and actual sewing forming at least a stitch in the sewing pattern data. portion and, there is preliminary feeding part sending the workpiece without configuring seams, the air when the feed is running portion, child detecting the edge of the fabric end detecting means said workpiece Without performing the preliminary feeding data after the, means for skip to the next actual sewing portions, the stitches from the real sewing portion blown by the blowing means
A control device for an automatic sewing machine , comprising: execution means for sewing a product . 2. A sewing machine, a motor for driving a main shaft of the sewing machine, a cloth presser for clamping a sewing product, and a biaxial drive mechanism for independently moving the cloth presser in X and Y directions orthogonal to each other. A drive control means for controlling the drive of the two-axis drive mechanism to move the presser foot device to a predetermined position; a control device for controlling overall operations of the motor and the drive control means; In a control device for an automatic sewing machine, comprising a storage means for storing a program, sewing pattern data, and the like, a cloth end detecting means for detecting an end of the sewing product; Detection means ahead
By detecting the end of the sewing product , the sewing pattern data can be saved without executing some actual sewing data.
To skip sewing pattern data to the next inflection point in
And the first passing through the inflection point skipped by the skipping means
And an execution means for sewing the sewn material from the actual sewn portion of the automatic sewing machine. 3. The automatic sewing machine according to claim 1, further comprising a retracting means for retracting the cloth edge detecting means from an actual sewing portion before sewing the sewing product. Control device.