JPS641578B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of boring a fabric by following the shape of an eyelet in a needle stitch sewing machine used for sewing eyelet stitches.

(Prior Art) An example of the conventional art is Japanese Utility Model Application Publication No. 1983-4695.

(Problems to be Solved by the Invention) Conventionally, when boring the fabric prior to stitching, for example, a scalpel formed so that the fabric is incised in a 10-shape manner is applied over the entire surface of the fabric within the eyelet area. Because the eyelet was bored by piercing, problems such as the periphery of the incised eyelet becoming messy, some of the thread within the eyelet area to be cut remaining uncut, and the number of operations of the scalpel required for boring increasing. The point was hot.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for boring an eyelet in a needle stitch sewing machine, which eliminates the above-mentioned problems and allows eyelets to be bored accurately and efficiently.

(Means for Solving the Problems) The present invention provides a sewing needle and a scalpel that are arranged side by side so that they can each move up and down independently and can move together in the horizontal direction, at a fixed position in an operating position opposite to an elevating member that moves up and down. In a needle stitch sewing machine configured to be selectively driven up and down, when the knife is moved to the operating position, the fabric is intermittently controlled by a transfer signal transmitted based on the eyelet pattern, and the knife The fabric is rotated by an angle signal transmitted each time the fabric is transferred so that the linear blade line formed on the knife is oriented in the fabric transfer direction prior to the raising/lowering movement of the knife, and the fabric is moved into the eyelet shape. The gist of this is a boring method in which incisions are made sequentially along the contour line.

(Function) The method of the present invention controls the rotation of the knife every time the fabric is transferred according to a predetermined eyelet pattern, and directs the linear blade line formed on the knife in the fabric transfer direction. The fabric is sequentially incised along the outline of the eyelet pattern to form the eyelets.

(Example) Next, an example of a device used in the present invention and a method of implementing the present invention using this device will be described.

In order to control the intermittent transfer of the eyelet stitched fabric in the X and Y directions of the XY-axis plane orthogonal coordinate system according to the pattern to be stitched, a transfer signal from a command device that stores X and Y data corresponding to the pattern to be stitched is used. In a single-head type or multi-head type embroidery sewing machine equipped with a transfer device whose drive is controlled based on It is linked to a crank mechanism (not shown) fitted in a housing 3 and is reciprocally driven in the vertical direction at a fixed position, and an engaging portion 2a that is open to the front and both sides is recessed in the front portion thereof.

The slide case 4 is supported so as to be slidable in the lateral direction relative to the front end of the head body 1, and the slide case 4 is provided with a signal from a command device (not shown) to move the slide case 4 in the horizontal direction in order to control the movement of the slide case 4 in the horizontal direction. Slide shaft 5 whose forward and backward movement is controlled
are connected to each other, and an appropriate number of needle bars 6 and transmission rods 7 arranged in parallel at equal intervals are suspended so as to be able to move up and down independently, and each needle bar 6 and transmission rod 7 is Interlocking pins 8 that protrude rearward are respectively installed in order to engage the engaging portions 2a in the operating position facing the lifting member 2 and selectively drive the needle bar 6 or the transmission rod 7 in the operating position to move up and down. It is worn.

The scalpel rod 9 is vertically movably supported in front of the transmission rod 7, and has a knife 1 at its lower end with a straight blade line 10a for cutting the fabric N into a uniform shape.
0 is fixed, and sewing needles 20 are fixed to the lower ends of the needle bars 6, respectively.

A sleeve 11 externally fitted onto the upper part of the female rod 9 is integrally and removably connected to the female rod 9 with a nut 12 screwed onto the upper end of the sleeve 11, and a key groove 11a is provided on the outer circumferential surface of the sleeve 11. The female rod 9 is recessed along the direction, and a locking piece 13 fixed to the transmission rod 7 and having a substantially U-shaped plane is inserted into the lower end of the locking piece 13.
In order to connect the transmission rod 7 to the transmission rod 7 so as to be able to move together in the vertical direction and to rotate, an engagement groove 11b having a U-shaped cross section is recessed along the circumferential direction. When the transmission rod 7 is moved to the operating position, the vertical movement of the transmission rod 7 is transmitted to the sleeve 11 via the locking piece 13, and the female rod 9 is moved up and down together with the sleeve 11.

A rotating shaft 14 horizontally suspended at the front end of the slide case 4 has a driving gear 16 fitted to the motor shaft of an angle control motor 15 installed on the side of the head body 1, and a rotating shaft 14 that is axially connected to the rotating shaft 14. Sleeve 1
A worm wheel 18 is connected to the sleeve 11 so that it can slide in the axial direction and rotate together with the sleeve 11 via a key fitted in the keyway 11a.
is the worm gear 1 fitted to the rotating shaft 14
The female rod 9 is rotationally controlled together with the sleeve 11 which is rotationally driven by the rotation of the angle control motor 15 via a worm gear 19 and a worm wheel 18, and the knife 10 is rotationally controlled.
In addition, in a multi-head embroidery sewing machine, the rotation of each rotary shaft 14 may be individually controlled by an angle control motor 15 provided in each sewing machine head.
Further, a common angle control motor 15 may be used to control the rotation of the rotary shaft 14 that extends horizontally through each sewing machine head. The angle control motor 15 controls the pointing angle of the blade line 10a of the scalpel 10 when the scalpel rod 9 and the transmission rod 7 move to the operating position.
In order to match the transfer direction of the fabric N whose transfer is controlled intermittently in the horizontal direction with the transfer signal transmitted based on the eyelet figure, an angular signal, for example, an angular signal transmitted every time the fabric N is transferred, is used. Rotation is controlled based on an angle signal obtained by converting the X and Y data for transfer control into angles. Therefore, the knife 10 is rotationally controlled prior to each vertical movement of the knife 10 so that the blade line 10a is oriented in the direction of transporting the fabric N when the knife rod 9a moves to the operating position. The knife 10 is moved to the fabric N by the lifting/lowering and rotational movements of the
The eyelets corresponding to the predetermined eyelet shapes can be bored by sequentially cutting in polygonal lines along the outline of the eyelet shapes.

Next, the operation and effects of the embodiment having the above configuration will be explained.

Now, in this example, when the scalpel rod 9 is moved to the operating position opposite the lifting member 2, the fabric N is intermittently controlled to be transferred by a transfer signal transmitted based on the eyelet pattern, and the knife 10 is 10
The rotation of the fabric N is controlled by an angle signal transmitted every time the fabric N is transferred so that the linear blade line 10a formed in the knife 10 is oriented in the fabric transfer direction prior to the vertical movement of the knife 10. It is configured to make incisions sequentially along the contour line.

Therefore, the incision line of the eyelet cut with the scalpel 10 coincides with the tangent line of each part of the contour line of the eyelet shape, and the eyelet shape can be accurately and reliably cut out along the contour line, so that the periphery of the bored eyelet is This has the effect of eliminating problems such as clutter and remaining uncut threads, and allowing eyelets of each shape to be bored in an orderly manner.

In addition, since the eyelets are sequentially incised along the contour of the eyelet shape, there is no need to cut the inside of the eyelet shape, which has the effect of reducing the number of knife operations and operating time, thereby streamlining the eyelet boring work. be.

(Effects of the Invention) That is, in the present invention, a sewing needle and a scalpel, which are arranged side by side so that each can move up and down independently and can move together in the horizontal direction, can be selectively moved at a fixed position in an operating position opposite to an elevating member that moves up and down. In a needle stitch sewing machine configured to be driven up and down, when the knife is moved to the operating position, the fabric is intermittently controlled by a transfer signal transmitted based on the eyelet pattern, and the knife is The linear blade line formed on the scalpel is rotated by an angle signal transmitted each time the fabric is transferred so that it is oriented in the fabric transfer direction before the knife moves up and down, and the fabric is aligned with the outline of the eyelet shape. Since this is a method in which incisions are made sequentially along the eyelet, each shape of the eyelet can be incised in an appropriate and orderly manner.
This has the effect of efficiently boring the eyelet.

[Brief explanation of drawings]

The drawings show one embodiment of the apparatus used in the present invention, and FIG. 1 is a partially cutaway side view of the main parts, FIG. 2 is a front view of the same, and FIG. 3 is an enlarged perspective view of the scalpel. 2... Lifting member, 10... Scalpel, 10a... Blade line, N... Cloth.

Claims (1)

[Claims] 1. A sewing needle and a scalpel, which are arranged in parallel so that each can move up and down independently and can move together in the horizontal direction, are configured to be selectively driven up and down at an operating position opposite to an up-and-down member that moves up and down in a fixed position. In a needle stitch sewing machine, when the knife is moved to the operating position, the transfer of the fabric is controlled intermittently by a transfer signal transmitted based on the eyelet pattern, and the knife has a linear blade line formed on the knife. The fabric is sequentially incised along the contour line of the eyelet shape by rotationally controlled by an angle signal transmitted each time the fabric is transferred so that the knife is oriented in the fabric transfer direction prior to the raising/lowering operation of the scalpel. Boring method for embroidery sewing machine.