JPS6331584B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention uses a tracing needle as a target and moves the original painting as if the needle is tracing the original painting, and the movement is directly transmitted to the fabric tensioning section to perform stitching. This invention relates to an embroidery device for a sewing machine, which is capable of reducing or enlarging an original image and embroidering it onto cloth.

There are so-called pantograph-type embroidery devices in which the back and forth movement of the stretched fabric part, such as the embroidery frame, is performed by the bending and stretching of a pantograph mechanism, which allows the original image to be reduced or enlarged. In this type of traditional stabbing device, the tracing needle traces a fixed original image, and the movement is transmitted to the stabbing frame via a pantograph mechanism.
Since the tracing needle and the stitching frame move in the same direction, for example, if you move the tracing needle to the right side of the original image, the sewing machine needle will move to the left of the stitching frame, and if you move the tracing needle forward, the sewing machine needle will stitch the pattern. The problem was that it started to move toward the rear of the frame, creating a stitch that was upside down from the original. In some cases, the embroidery was corrected for being upside down and oriented in the same direction as the original, but this made the structure more complex. Also, if you grasp the tracing needle itself or its vicinity and try to move the stitching frame while tracing the original with the tracing needle, the tracing needle will move due to the frictional resistance between the cloth stretched over the stitching frame and the throat plate. There was a problem in that deflection occurred between the embroidery frame and the embroidery frame due to the lifting of the pantograph mechanism, and the poor accuracy of the pantograph mechanism also caused misalignment between the original image and the embroidery frame.

The present applicant has proposed a series of embroidery devices previously proposed in Japanese Patent Application No. 55-88981, in which a tracing needle is fixed and moved as if tracing the original painting, and the needle is moved as if tracing the original painting, and the needle is then used to pierce the frame. In the type of embroidery machine used in embroidery, the original image and the embroidery frame move as one, which eliminates the above-mentioned drawbacks, but the tracing needle and sewing machine needle are always located at a fixed position, and the distance between them is not constant. Therefore, the characters and figures drawn by the relative movement of the two were always the same, and it was not possible to embroider by reducing or enlarging the original image.

The present invention provides a pantograph mechanism that is capable of reducing or enlarging the needle in a type of needle that moves the tracing needle as if it were tracing the original and transmits the movement to the fabric tensioning section. This is a new feature that allows you to reduce or enlarge the original image for engraving.

Embodiments of the present invention will be described below with reference to the drawings. A runner 2 running on a rail, a runner (not shown) drilled on the side of the runner, a movable rail 3 supported by the runner so that it can run freely, and a stabilizing frame or a runner fixed on the movable rail. The cloth stretched by the cloth tensioning part 4 has a flat part 6 on which an original can be placed on the side or around the cloth tensioning part 5, and when performing embroidery, This embroidery machine has a mounting plate 8 which is partially supported on a sewing machine head 7, and a pantograph mechanism, which is indicated as a whole by reference numeral 10, is provided on the mounting plate. The pantograph mechanism 10 is formed by extending the other ends of adjacent links 11a and 11b which are pivoted at one end among four links 11 forming a parallelogram. When enlarging the original drawing, use the extension end A of the link 11a.
Links 11c, 1 are rotatably supported on a column fixed at a point, preferably a column 13 fixed to a fixed rail 1, and are opposed to the links 11a, 11b.
Attach the needle 14 to point B, which is the axis attachment point of 1d, and attach the axis at point C, which is the intersection of the extension of AB and the extension of link 11b, to the appropriate place on the mounting plate, preferably near the fabric tensioning part 5. be supported. Next, a cloth is stretched on the cloth tensioning part 5 of the mounting plate by a conventional method, and the original image 12
Place it under the tracing needle at point B and set it.

When stitching is to be carried out over the entire area or most of the stretched fabric, the tracing needle 14 and the sewing needle 15 are used to embroider the original image and the approximate center of the fabric stretched in the fabric stretching section 5, respectively. (See Figure 3A). This is because when the tracing needle is located at the edge of the original, the sewing needle comes off the stretched fabric and collides with the fabric stretching frame 4 or mounting plate 8. However, the mounting plate 8 targeted by the tracing needle 14 is operated so that the tracing needle traces the original image. The tracing needle 14 also moves as the mounting plate 8 is operated, but the direction of movement is the same as that of the mounting plate, and the movement is easily predicted.Moreover, the movement is small compared to the movement of the mounting plate, so it is easy to trace There is no difficulty in manipulating the mounting plate to target the needle.
In order to facilitate operation of the mounting plate 8, it is preferable to provide knobs 17 on both sides of the front surface of the mounting plate as shown.

FIGS. 3B to 3F show an example of stabbing performed by manipulating the mounting plate 8 to target the needle 14.

If you want to change the enlargement ratio, for example, if you want to make the enlargement ratio larger than what is shown, click link 11.
Change the axis attachment point of one end of d to link 11a from B to A, and increase the length of link C by 3/2, change the axis attachment point of one end of that end to link 11b from E to D,
Either attach the other end to the middle part of the link 11d (it is preferable to replace the link 11d with one that is 1/2 the length rather than use it as is), or create a new link and One end is pivoted to point 2 of link 11b, the middle part is pivoted to point t of link 11d,
Attach the tracing needle to the AC connection line.

If you want to reduce the enlargement ratio, click link 11c.
The axis attachment point to link 11b is set to
Change the axis attachment point of 1d to link 11a to C.

Next, if you want to pierce the original drawing by reducing it, remove point C of the link 11b from the mounting plate 8, attach the needle 14 to that part, and attach the mounting plate 8 to the point B. This is done by following the original drawing and transferring it under the needle and setting it. When changing the reduction rate, it is performed in the same way as when enlarging the image described above.

FIG. 4 shows another embodiment, in which a pair of large, medium and small links 21 of the pantograph mechanism 20 are combined in a state where the large link 21a intersects to form a large and small rhombus. A U-shaped connecting part 23 is integrally formed on 22, and one end A of the pantograph mechanism is connected to the connecting part 23 at an intersection point B, preferably a column (not shown) fixed to a fixed rail 24.
, and a needle is attached to the other end C of the pantograph mechanism 20. Reference numeral 25 denotes a movable rail that is perpendicular to the fixed rail 24 and fixed to a connecting portion that can move in the longitudinal direction of the fixed rail and in a direction orthogonal to the fixed rail. However, by operating the mounting plate 22 and furthermore the connecting portion 23 so that the tracing needle traces the original image set under the tracing needle, the original image is enlarged and embroidered onto the stretched cloth.

If the original image is to be embroidered in a reduced size, the left and right sides of the pantograph mechanism 20 are reversed (see FIG. 5). In this case, although the position of point C changes, the position of the tracing needle remains unchanged.Therefore, there is no need to change the setting position of the original image regardless of enlargement/reduction, and therefore the mounting surface on which the original image is set does not need to be changed. It can be made narrower than that of the above embodiment.

In each of the embodiments described above, the movement of the mounting plate back and forth and left and right is performed along the longitudinal directions of the orthogonal rails, but instead of the rail, one end is fixed and the other end is connected to the mounting plate. A pantograph mechanism may be provided, and by bending and stretching the mechanism, the mounting plate may be moved back and forth and left and right, similar to the conventional pantograph system and the stabilizing device. In this case, two types of pantograph mechanisms are therefore provided, for example above and below the mounting plate, so as not to interfere with each other's movements.

As described above, the stabilizing device of the present invention is provided with a new pantograph mechanism on the mounting plate that can be moved back and forth along each longitudinal direction of the orthogonal rails or by bending and stretching the pantograph mechanism.
This is a type of embroidery device that uses a tracing needle to move the original image as a target to pierce the original image.

[Brief explanation of the drawing]

The figures show a stabilizing device according to the present invention, in which Figure 1 is a plan view, Figure 2 is a front view, and Figures 3A to 3F are
The figure shows the order of stitching operation when enlarging an original image, and FIGS. 4 and 5 are plan views of another embodiment, showing an example of enlarging and reducing an original image. 8... Mounting plate, 10... Pantograph mechanism, 1
4... Tracing needle, 15... Sewing needle, 20... Pantograph mechanism, 22... Mounting plate, 23... Connecting portion.

Claims (1)

[Claims] 1.Equipped with a fabric upholstery section and a mounting section on which the original picture is placed,
It has a mounting plate in which the longitudinal movement is performed along each longitudinal direction of the rails arranged orthogonally, or by bending and stretching the pantograph mechanism, and the needle is moved along the mounting plate by tracing the needle as a target. In the embroidery device of a sewing machine, which performs embroidery by manipulating it as if tracing the original drawing, it is made up of two sets of parallel links, and the dab and tracking point are located on a straight line passing through a fixed point, and the dab and the tracking point are This pricker is provided with a pantograph mechanism 10, 20 that moves in a manner similar to a dot, and uses the tracing needle as a tracking point and any point on the mounting plate 8 or a connecting part 23 integrated with the mounting plate as a dab point.