JPH071114Y2 - Automatic sewing machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic sewing machine for embroidering a sewn product or sewing a decorative tape or the like on the sewn product.

[0002]

2. Description of the Related Art For example, the work of embroidering or sewing decorative tape on the upper of a female shoe is performed by an automatic sewing machine. In this work, leather that is a sewn product punched into a predetermined shape is attached to a sewn product mounting frame body, and the sewn product mounting frame body is moved based on a preset pattern by a frame body moving mechanism of the automatic sewing machine. Done by. In order to obtain a beautiful finish, the automatic sewing machine is driven so that the front surface of the needle presser always faces the traveling direction of the sewing machine needle.

The sewn product mounting frame is formed with a groove portion corresponding to a pattern such as embroidery to be applied to a plate material such as a synthetic resin. This groove is an essential part of the sewn product mounting frame, because embroidery and the like are made by the upper thread from the upper side of the processing work table and the lower thread from the lower side of the processing work table. is there.

[0004]

However, the above-mentioned conventional automatic sewing machine has the following problems.
That is, a sewn product, such as leather, is slightly stretched or contracted depending on humidity or the like. Therefore, even if the sewn product is attached to the sewn product mounting frame at a proper position, the sewn product may not be at the proper position with respect to the sewing machine needle of the automatic sewing machine. Further, the sewn product is not always cut into a predetermined size, and the error causes the same problem.

The present invention has been made in view of the above circumstances, and automatically corrects a sewing product to a proper position even when the sewing product is not in a proper position with respect to the sewing machine needle of the automatic sewing machine. The purpose of the invention is to provide an automatic sewing machine that can do this.

[0006]

SUMMARY OF THE INVENTION An automatic sewing machine according to the present invention is an automatic sewing machine in which a front surface of a freely rotatable needle holder is driven so that the front surface of the needle holder always faces the traveling direction of the sewing machine needle.
A frame moving mechanism that moves the sewn product mounting frame to which the sewn product is attached with respect to the sewing machine needle, an image input unit that captures the positional relationship between the sewn product and the sewing machine needle as an image, and this image input unit is the sewn product. An image input unit moving mechanism that moves according to the drive of the needle presser so that the sewing machine needle is always caught from the same direction, and the sewing machine needle sew at a predetermined position of the sewing product based on the pattern input in advance. And a control unit that controls the frame moving mechanism based on the image from the image input unit and controls the image input unit moving mechanism.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic block diagram of an automatic sewing machine according to an embodiment of the present invention, FIG. 2 is a schematic perspective view of the periphery of a needle holder of this automatic sewing machine, and FIG. FIG. 4 is a plan view showing the outline of the frame moving mechanism, and FIG. 5 is a perspective view showing an example of the frame moving mechanism.

The automatic sewing machine according to the present embodiment is an automatic sewing machine in which the front surface of the freely rotatable needle retainer 100 is driven so that the front surface of the needle retainer 100 always faces the traveling direction of the sewing machine needle 150.
Sewing machine attachment frame 600 to which 700 can be attached is sewing machine needle 150
The frame body moving mechanism 200 for moving with respect to
The image input section 300 that captures the positional relationship between the sewing machine and the sewing machine needle 150 as an image, and the needle presser 100 so that this image input section 300 always captures the sewing product 700 and the sewing machine needle 150 from the same direction.
Image input section moving mechanism 400 that moves according to the drive of
Sewing needle 150 based on the pattern entered in advance
Includes a control unit 500 for controlling the frame moving mechanism 200 based on the image from the image input unit 300 so as to sew a predetermined position of the sewn product 700, and a control unit 500 for controlling the image input unit moving mechanism 400. ing.

At the tip of the needle presser 100 of this automatic sewing machine, there is a through hole 110 through which a sewing machine needle 150 penetrates and a sewing product 700.
An introduction hole 120 is formed to guide the decorative tape 610 sewn to the sewing machine needle 150. Further, the needle presser 100 is centered around the sewing machine needle 150 and is indicated by an arrow A in FIG.
It can be rotated in any direction. This is because the front surface of the needle presser 100 (the side where the introduction hole 120 is seen from the through hole 110) always faces the direction of travel of the sewing machine needle 150 in order to finish the sewing trace beautifully.

A small CCD camera is used for the image input section 300. The image input unit 300 is attached to an angle 310 provided around the needle holder 100. The angle 310 has a ring-shaped portion 311 and a mounting portion 312 depending from the ring-shaped portion 311, and the ring-shaped portion 311 surrounds the needle presser 100 and the sewing machine needle 150. . A CCD camera is attached to the attachment portion 312.

The angle 310 is an image input unit moving mechanism.
By 400, it is possible to rotate in the direction of arrow B shown in FIG. That is, as shown in FIG. 3, the positional relationship between the edge portion 710 of the sewing product 700 and the needle presser 100 is completely opposite when the traveling direction of the sewing machine needle 150 is the arrow α direction and when it is the arrow β direction. Therefore, if the image input unit moving mechanism 400 is not provided, it becomes impossible to capture the relationship between the two at the same position. Therefore, the image input unit moving mechanism 400 is required.

The sewn product mounting frame 600 is no different from that used in a conventional automatic sewing machine, and is a plate member made of a synthetic resin in which a groove portion corresponding to a pattern such as embroidery to be applied is formed. The sewn product 700 is attached to the sewn product attachment frame body 600 by an appropriate means such as a double-sided tape.

The sewn product mounting frame body 600 is mounted,
The frame moving mechanism 200 that can be moved is a sewing workbench.
It is installed at 230. The frame moving mechanism 200 has two
It is composed of two moving mechanisms, that is, a first moving mechanism 210 for moving the sewn product mounting frame body 600 by a large amount and a second moving mechanism 220 for moving the sewn product mounting frame body 600 by a small amount.

The first moving mechanism 210 includes a sewing work table 230.
And an X-axis slider 211 that moves in the X-axis direction along two guide grooves 231 formed in the Y-axis, and a Y-axis slider that is attached to the X-axis slider 211 and moves in the Y-axis direction that is orthogonal to the X-axis. Axis slider 212 and these sliders 211,
And a drive motor (not shown) for driving 212. The first moving mechanism 210 moves the second moving mechanism 220, that is, the sewn product mounting frame body 600 attached to the second moving mechanism 220, according to a pattern previously input to the control unit 500.

On the other hand, the second moving mechanism 220 is provided on the Y-axis slider 212. The second moving mechanism 220
Are two X-axis direction moving rails 221 formed at the left and right ends of the Y-axis slider 212, and the X-axis direction moving rails 22.
1 has a slider 221c movably attached to it, a ball screw 222 spanned by the slider 221c, and a frame body mounting portion 223 which is screwed to the ball screw 222 and moves in the Y-axis direction. .

The X-direction moving rail 221 is a rail base 221a.
A slider 221c movable along a guide groove 221b formed on the rail base 221a, and a slider 221c.
And a drive motor (not shown) for driving the. The slider 221c is formed with a protrusion 221d that protrudes from the guide groove 221b while being fitted in the guide groove 221b.

The sewn product mounting frame body is attached to the frame body mounting portion 223.
Mounting means (not shown) for detachably mounting the 600 is provided.

The second moving mechanism 220 configured as described above
Is a sewing product 700 captured by the image input unit 300.
The position of the sewn product 700 is corrected so that the interval between the edge portion 710 and the pattern is set in advance. That is,
Even if the sewn product 700 is stretched and contracted and is attached to the sewn product mounting frame body 600 at the proper position, when the sewn product 700 is not in the proper position with respect to the sewing machine needle 150 of the automatic sewing machine, The positional deviation is corrected.

The sewing part 700 and a pattern to be sewn are input to the control part 500, and the sewing machine needle 150 sew a predetermined position of the sewn product 700 based on the pattern. The frame moving mechanism 200 is controlled based on the image from 300. That is, control is performed so that the space between the sewing machine needle 150 captured by the image input unit 300 and the edge portion 710 of the sewn product 700 becomes a predetermined distance. At the same time, as described above, when the traveling direction of the sewing machine needle 150 is in the direction of arrow α and in the direction of arrow β, the sewing product is
Since the positional relationship between the edge portion 710 of the 700 and the needle presser 100 is completely reversed, the image input unit moving mechanism 400 is also controlled so as not to be like this. Needless to say, the control unit 500 also controls the rotation of the needle presser 100, the movement of the sewing machine needle 150, and the like.

[0020]

The automatic sewing machine according to the present invention is an automatic sewing machine which is driven so that the front surface of the rotatable needle retainer always faces the direction of movement of the sewing machine needle. A frame moving mechanism that moves the mounting frame with respect to the sewing machine needle, an image input unit that captures the positional relationship between the sewing product and the sewing machine as an image, and this image input unit keeps the sewing product and the sewing machine needle in the same direction. Based on the image input unit moving mechanism that moves according to the drive of the needle presser as seen from the above, and the pattern that has been input in advance, the sewing machine needle from the image input unit so as to sew a predetermined position of the sewing product. While controlling the frame moving mechanism based on the image, since it is provided with a control unit for controlling the image input unit moving mechanism,
Even when the sewn product is not in the proper position with respect to the sewing machine needle of the automatic sewing machine, the sewn product can be automatically corrected to the proper position to perform accurate sewing based on the pattern.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an automatic sewing machine according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view of the periphery of a needle holder of this automatic sewing machine.

FIG. 3 is an explanatory diagram for explaining the necessity of an image input unit moving mechanism.

FIG. 4 is a plan view showing an outline of a frame moving mechanism.

FIG. 5 is a perspective view showing an example of a frame moving mechanism.

[Explanation of symbols]

 100 Needle holder 150 Sewing machine needle 200 Frame moving mechanism 210 1st moving mechanism 220 2nd moving mechanism 300 Image input section 400 Image input section moving mechanism 500 Control section 600 Sewing item mounting frame 700 Sewing item

Claims (2)

[Scope of utility model registration request] 1. In an automatic sewing machine in which a front surface of a rotatable needle presser is always driven so as to face the traveling direction of a sewing machine needle, a sewing product mounting frame body to which a sewing product is mounted is moved with respect to the sewing machine needle. A frame moving mechanism for making the image, an image input section for capturing the positional relationship between the sewn product and the sewing machine needle as an image,
While the image input section moving mechanism moves the sewing machine and the sewing machine needle according to the drive of the needle presser so that the sewing machine and the sewing machine needle are always caught from the same direction, the sewing machine needle is An automatic sewing machine that controls a frame moving mechanism based on an image from the image input unit so as to sew a predetermined position of the image input unit, and a control unit that controls the image input unit moving mechanism. . 2. The frame moving mechanism is provided with a first moving mechanism for moving the sewn product mounting frame according to a pattern previously input to the control unit, and the first moving mechanism is provided with the first moving mechanism. 2. A second moving mechanism that corrects the position of the sewn product such that the space between the pattern and the edge portion of the sewn product becomes a preset distance.
Automatic sewing machine described.