JPS599659B2 - embroidery device on sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an embroidery device for a sewing machine in which an embroidery frame is rotated and moved back and forth and left and right in conjunction with the operation of an original stage, thereby making it possible to perform embroidery stitches with varying thread alignment angles.

There are already some known embroidery frames in which the embroidery frame can rotate and move forward, backward, left and right, allowing embroidery to be performed by changing the angle of the thread arrangement, but For the type of embroidery in which embroidery is performed by tracing a figure drawn on a piece of fabric, the embroidery can be performed by either grasping only the embroidery frame or grasping the support frame and the embroidery frame separately. It is not easy to operate the embroidery frame in order to give it three different movements at the same time: rotation, back and forth movement, and side to side movement, and it is especially difficult to operate the embroidery frame so that the needle pierces the desired location accurately. It was difficult and required a great deal of skill to embroider according to the pattern drawn on the cloth.

Moreover, it was not easy to accurately copy the original drawing onto the cloth, and discrepancies were likely to occur between the figure drawn on the cloth and the original drawing.

Also known is one in which a fixed original image is traced using a tracer and the movement is transmitted to the embroidery hoop.

In this case, the tracer moves while in contact with or very close to the original image, which has the advantage of making copying easier and more reliable. However, on the other hand, the movement of the tracer is not accurately transmitted to the embroidery hoop, resulting in errors. The problem was that it was easy to cause

Moreover, with this device, the embroidery frame can only move forward, backward, left and right, and even if an attempt was made to rotate the embroidery frame by operating the tracker, it was impossible due to its mechanism.

SUMMARY OF THE INVENTION An object of the present invention is to provide an embroidery device for a sewing machine that eliminates the drawbacks of the conventional devices described above, and allows easy rotation of the embroidery frame as well as movement of the embroidery frame back and forth and left and right, making it easy to embroider in accordance with the original image. It is something.

Embodiments of the present invention will be described below with reference to the drawings. In the drawing, 1 is fixed at one end to a presser bar A of a sewing machine D with a screw 20;
A support plate 3 is interposed between a fixed rail provided parallel to the bed on the bed B and a movable rail 2 provided perpendicular to the fixed rail, and is arranged in a rectangular shape at the four corners of the support plate. Of the guide wheels 4, 4 which are pivoted on top and bottom with a plate in between, a fixed rail 1 is installed between the left and right guide wheels on the upper side, and a movable rail is installed between the front and rear guide wheels on the lower side. The end face is fitted into the side groove of the guide wheel 4, so that the movable rail 2 can slide back and forth and left and right in the longitudinal direction of the fixed rail 1 and in a direction perpendicular thereto.

5 is a ring of any shape, preferably circular, which is connected to the lower moving rail 2 at both ends thereof by a supporting culm 6, and whose inner diameter is the same as or larger than that of the embroidery frame described below. A mounting plate formed in a wedge shape by cutting out the = part of a ring having a diameter of , Several rollers 7 are pivotally supported in the ring-shaped portion at appropriate intervals at positions circumscribing a circle, and the annular support frame 9 is rotated by the rollers I that fit into the grooves 8 on the outer periphery. Possibly supported.

11 is pivotally supported at the tip of the curved part of the mounting plate 5, and has a concave groove 1 on the outer periphery.
2 is preferably a disc-shaped operation plate whose diameter is the same as that of the support frame 9, and the concave groove 8 of the support frame 9
A pair of rollers 7 are fitted into the grooves 12 of the operation plate 11, and a belt (preferably a timing belt) stretched between the pair of rollers 7 is supported by the anti-slip belt 10. When the frame 9 and the operation plate 11 are engaged from both sides and the operation plate is rotated in one direction, the support frame 9 is rotated in the same direction by belt transmission.

Reference numeral 14 denotes an embroidery frame which is held by the support frame 9 by support pieces 15, and is similar to known embroidery frames in which a fabric is clamped and stretched between the frame and the support frame.

The embroidery frame supported by the support frame can be fixed not only by the above-mentioned support pieces but also by a clip that is convenient for attachment and detachment, or by a helical spring whose one end is latched to the embroidery frame.

Reference numeral 16 is a wire spring-like culm whose base is fixed to the end of the fixed rail with a screw 22, and its tip 17 is directed toward an original image 21 fixed on an operation panel.

Possible methods for fixing the original image include fixing with pins, clip adhesive tape, adhesive, etc., or adsorption with a magnet.

It is also desirable to set the culm tip 17 so that it is located at the center of the operation panel 11 when the needle C is aligned with the center of the embroidery frame.

The reason for this is that if the distances to the centers of rotation of the needle and the tracing needle are different, the length of the arc drawn by the needle and the tracing needle will be This is because the amount of movement is different, causing misalignment in the embroidery seams and causing them to no longer match the original.

18 is a handle attached to the branch culm 6.

In the device described above, the fixed rail 1 has a culm 1 attached to the presser bar A.
6 is fixed to the fixed rail 1, but they may both be fixed to the presser foot A, or to a bed, table, or other sewing machine frame, or they may be fixed individually to different locations. .

In addition, in the illustrated device, the belt that transmits the rotation of the operation plate to the embroidery frame is stretched only between the pair of rollers 7, 7, but it is not stretched around the outer periphery of the support frame 9 and the operation plate 11 or on the rollers. It is desirable to extend the belt only between the support frame and the operation plate so that the contact area between the belt, the support frame and the operation plate is small, and belt transmission is performed more reliably.

In this case, a belt tension adjustment device that is normally provided in a belt transmission device can be easily provided.

Note that instead of transmitting power between the operation plate 11 and the support frame 9 using a belt, the operation plate and the support frame may be in direct contact with each other, or may be frictionally transmitted via a friction wheel. A gear may be provided for gear transmission.

Furthermore, in addition to the device shown in the figure as a device for movably attaching the movable rail to the fixed rail vertically and horizontally, a sliding body such as a sleeve that slidably engages the fixed rail and a movable rail that can be slidably attached to the movable rail. It is possible to use a structure in which the engaging sliding bodies are orthogonally crossed and integrated.

In addition, instead of using a device including a fixed rail and a movable rail as shown in the figure to move the mounting plate back and forth, a device including guide rails arranged orthogonally, which is generally used in conventional embroidery equipment, is used. You can.

Furthermore, the illustrated apparatus may be configured so that the embroidery frame is directly rotated without providing a support frame.

In this case, the fabric is fastened to the embroidery hoop with pins or other fastening devices.

Further, the support frame may be supported by forming an annular projection on the intermediate mounting plate which is rotatably supported by rollers as shown in the figure, and by rotatably fitting the support frame into the projection. Alternatively, it may be supported by a known bearing device.

Embroidery with this device is performed by placing and fixing the original image 21 on the operating panel 11, holding the handle 18, and moving the operating panel back and forth and left and right while turning the operating panel according to the pattern of the original image in accordance with the culm tip 17.

Here, the embroidery frame is rotated and moved forward, backward, left, and right while grasping the handle and rotating the operation panel, but it is also possible to rotate and move the embroidery frame forward, backward, left, and right by grasping only the operation panel. .

As described above, in the embroidery device of the present invention, the target culm tip is stationary, so it is easier to trace the original image, and it is easier to operate than the conventional embroidery frame that rotates and moves back and forth and left and right. Furthermore, since the operation plate and the embroidery frame are both attached to the mounting plate and move together in the front, rear, left and right directions, there is no error in movement between the operation plate and the embroidery frame.

Therefore, according to the apparatus of the present invention, embroidery can be easily and reliably performed in accordance with the original drawing.

[Brief explanation of drawings]

The figures show an embroidery device for a sewing machine according to the present invention; FIG. 1 is a plan view thereof, FIG. 2 is a front view thereof, and FIG. 3 is a perspective view thereof. 1... Fixed rail, 2... Movable rail, 5... Mounting plate, 7... Roller, 9...
...Support frame, 10...Belt, 11...
...Operation board, 14...Embroidery frame, 16...
...Culm, 21...Original picture.

Claims (1)

[Scope of Claims] 1. A mounting plate 5 supported by a support device so as to be rotatable and movable back and forth and left and right on the bed B, and an embroidery frame supported only rotatably by a holding device on one side of the additional plate. 14, an operation plate 11 rotatably supported on the other side of the mounting plate 5 and on which the original image 21 is placed and fixed, a transmission means for transmitting the rotation of the operation plate to the embroidery frame, and a sewing machine and others 9. A culm 16 that is fixed to a device or instrument and whose tip 17 is directed toward the original image on the operation board.
In addition, the mounting plate is further provided with an opening on one side thereof large enough to prevent the edge of the hole from protruding into the embroidery frame. 2. The support device is fixed to a sewing machine or the like, and includes a fixed rail 1 provided on the belt in parallel with the bed, and a support device that intersects with the fixed rail 1 and is slidable in the longitudinal direction and in the direction crossing the fixed rail. An embroidery device for a sewing machine according to claim 1, comprising a movable rail 2 and a support rod 6 that connects and integrates the movable rail 2 and the mounting plate 5. 3 The holding device is an annular support frame 9 that holds the embroidery frame.
An embroidery device for a sewing machine according to claim 1, comprising: and several rollers 7 pivotally supported by a mounting plate 5 so as to circumscribe the outer periphery of the support frame at appropriate intervals. 4. An embroidery device for a sewing machine according to claim 1, wherein the transmission means is a device including an endless belt 10 that directly engages with an operation plate 11, a support frame 9, or an embroidery frame 14. 5. The embroidery device for a sewing machine according to claim 4, wherein the endless belt 10 is stretched around the outer periphery of the operation plate and the outer periphery of the support frame. 6. The embroidery device for a sewing machine according to claim 1, wherein rotation of the operation plate is transmitted to the embroidery frame by friction transmission. 7. The embroidery device for a sewing machine according to claim 1, wherein rotation of the operation plate is transmitted to the embroidery frame by gear transmission. 8. The embroidery device for a sewing machine according to claim 1, wherein the culm tip 17 is set so as to be located at the rotation center of the operation plate 110 when the needle is at the rotation center of the embroidery frame 14.