JPS6331585B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has a main body having an original drawing stand on which an original drawing is placed, a cloth stretching frame, and a fixed tracing needle that points at the original drawing on the original drawing stand. This invention relates to a method of stitching using a stitching device of a sewing machine, in which copy stitching of an original picture is performed by moving the original picture with a tracing needle as if tracing the original picture.

When sewing with a sewing machine, the presser foot is generally removed, but the presser foot is kept at a height such that it collides with the sewing frame even if the presser foot is raised using the presser foot lifting lever. The same thing applies to the sewing machine's stitching device as described above; the presser foot is located behind the needle, so the original image fits within the fabric tensioning frame, and the stitches protrude beyond the fabric tensioning frame. Even if you set the mounting position of the original image so that it will not bleed, if you try to trace the upper part of the original image as shown in Figures 1 and 2, the presser foot will hit the fabric tensioning frame first and the copy stitching shown in the dotted line will not be performed. I couldn't do it.

In the present invention, an original drawing stand and a fabric tensioning frame are rotatably attached to the main body, and the tracing needle is set so that when the sewing machine needle is located at the rotational center of the fabric tensioning frame, it is located at the rotational center of the original drawing stand. Using a stabilizing device,
In the middle of copy stitching, stop the work once and rotate both the original table and the fabric tensioning frame by the same amount, and move the main body back and forth in parallel with this, so that the work is within the radial direction of the fabric tensioning frame rather than the presser foot. After displacing the sewing machine needle located on the opposite side radially outward and positioning it closer to the periphery of the fabric tensioning frame, the sewing machine needle and tracing needle are aligned with their respective interrupted positions, and then the sewing operation is resumed. By doing so, the above-mentioned problems will not occur.

The present invention will be explained below with reference to the drawings. The illustrated embroidery device is an example of the embroidery device used in the method of the present invention. 3 and fabric upholstery frame 4
A main body 5 rotatably supported is connected by a pantograph mechanism 6, and the main body 5 can be moved back and forth and left and right by bending and stretching the pantograph mechanism, and a rod 7 is supported by the fixed member 2. A tracing needle 9 is provided at the end of the rod to point at the original image 8 on the original image stand. Here, the tracing needle 9 is set so that it is located at the center of rotation of the original drawing stand 3 when the sewing machine needle 11 is located at the center of rotation of the cloth tensioning frame.

Stab is performed by targeting the tracing needle 9 and manipulating the main body 5 as if the tracing needle traces the original image.During the tracing operation, for example, as shown in Fig. 1, the upper part of the original image is traced and the needle is moved downward. When the presser bar 3 hits or is about to hit the fabric stretching frame 4 as it moves, the tracing work is temporarily interrupted and the original drawing stand 3 is moved.
After rotating both the sewing machine and the fabric tensioning frame 4 by a required amount, preferably 180 degrees, the main body 5 is moved in the direction of the arrow in FIG. 1, and the sewing machine needle and tracing needle are positioned at their respective interrupted positions.

Instead of rotating the original drawing stand and fabric tensioning frame and then moving the main body, first move the main body, then rotate the original drawing stand and fabric tensioning frame to align each interrupted point with the sewing machine needle and tracing needle. Good too. By operating the main body 5, the sewing machine needle is moved relatively along the inner edge of the fabric tensioning frame, and while it reaches the position shown in FIG. It is located radially outward, and can come into contact with the inner surface of the fabric tensioning frame near the middle portion, and thereafter is located radially outward from the presser bar 1. In the state shown in FIG. 2, the gap between the presser bar and the fabric tensioning frame is at its maximum, and it is possible to stitch the frame up to the periphery around this area. As mentioned above, the sewing machine needle and tracing needle are set to coincide with the respective rotation centers of the fabric tensioning frame and original drawing stand, so if the original drawing stand and fabric tensioning frame are rotated by the same angle, the sewing machine needle will move. The position on the fabric that the tracing needle points to and the position on the original stand that the tracing needle points to do not change even after rotation. Therefore, even if the stitching operation is interrupted, the sewing machine is rotated, and the tracing operation is resumed from the interrupted point, the sewing machine needle will not deviate from the interrupted stitching stitch.

Transmission means are provided to enable the original stage and the upholstery frame to rotate equiangularly and preferably in the same direction. The figure shows intermediate gear 1 as an example.
A gear transmission means consisting of three gears is shown. It is desirable to provide a stopper, for example, a pawl that feeds into a gear, so that the original picture stand and the cloth tensioning frame can be fixed after being rotated by a required amount.

Instead of connecting both the original drawing stand and the cloth tensioning frame via a transmission means, it is preferable that a protrusion be provided on the circumference of either one of them between the cloth stretching frame and the main body and between the original drawing stand and the main body. A pin is provided that is biased in the radial direction of the other by a spring, and recesses into which the pins can fit are provided on the other circumference, for example, at every 90°, and the fabric tension frame and original art stand are placed at every 90°. It may also be made rotatable.

According to the method of the present invention, it is possible to sew over the entire area within the fabric tensioning frame, and therefore the area on which embroidery can be performed is substantially increased. This makes it easier to change the area and divide the original image into sections when stitching is required several times, such as when stitching a large original.

[Brief explanation of the drawing]

Figures 1 and 2 show the state when the presser foot hits the fabric tensioning frame, and Figure 3 shows the original stage and fabric tensioning frame rotated 180 degrees to position the sewing machine needle on the periphery of the fabric tensioning frame. FIG. 1... Presser bar, 3... Original drawing stand, 4... Fabric tension frame, 5... Main body, 9... Tracing needle, 11... Sewing machine needle, 13... Intermediate gear.

Claims (1)

[Claims] 1. A main body on which an original drawing stand on which an original image is placed and a fabric tensioning frame are rotatably attached, and a sewing machine needle is set so that it points at the rotation center of the original drawing stand when it is located at the rotational center of the fabric tensioning frame. A sewing machine has a fixed tracing needle, and uses the tracing needle as a target to sew the main body of the sewing machine so that the needle traces the original. Pause tracing, rotate both the original drawing stand and the fabric tensioning frame by an equal angle, move the main body back and forth, and rotate the sewing machine needle located radially inward of the fabric tensioning frame from the presser bar. After displacing the needle outward in the direction and positioning it near the periphery of the fabric tensioning frame, align the sewing machine needle and tracing needle with their respective interrupted positions, and then resume the stitching operation to cover the entire area of the fabric tensioning frame. A method of sashimi that makes it possible to sashiyu.