JPH0114336B2 - - 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 technology is Japanese Utility Model Application Publication No. 1983-4695.

(Problems to be Solved by the Invention) Conventionally, when boring the fabric prior to eyelet stitching, for example, a scalpel formed so that the fabric is incised in a 10-shape shape is used to strike the entire area of the fabric within the eyelet area. Because the eyelet was incised by piercing the eyelet over the area, the periphery of the incised eyelet became messy, some of the thread within the eyelet area was left uncut, and the number of operations of the scalpel required for boring increased. There were some problems, such as:

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

(Means for Solving the Problems) The present invention intermittently controls the transfer of fabric according to the pattern of eyelet pricking, and at the same time, moves a female rod to which a female having a circular edge is attached to the female rod. The knife is rotated at the operating position where it is driven up and down, and by the rotating operation of the lowered scalpel, round holes are punched into the fabric each time the knife stops after being transferred, and a group of punch holes are punched into the eyelets. The gist of this is a bowling method that connects the symbols in a chain along the contours of the symbols.

(Function) The present invention rotates a scalpel with a circular edge to punch round holes in the fabric whose transfer is controlled intermittently according to the eyelet stitching pattern each time the scalpel moves up and down. However, the fabric is bored by a group of endlessly connected punch holes along the outline of the eyelet pattern.

(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.

The fabric to be embroidered with eyelets is embossed according to the pattern of the embroidery.
A single-head type or multi-head type embroidery sewing machine equipped with a transfer device that is driven and controlled based on a transfer signal from a command device that stores X and Y data corresponding to the eyelet embroidery pattern in order to control intermittent transfer in the Y direction. In a sewing machine, an elevating member 2 disposed at the front end of a head main body 1 of a sewing machine head M is linked to a crank mechanism (not shown) fitted to a main shaft 3 extending transversely through the head main body 1, and is reciprocated in the vertical direction at a fixed position. The front portion thereof is recessed with an engaging portion 2a that is open to the front and both sides.

The slide case 4 is supported so as to be slidable in the lateral direction relative to the front end of the head main body 1, and the slide case 4 is moved in the horizontal direction by a switching signal from a command device (not shown) in order to control the movement of the slide case 4 in the horizontal direction. A slide shaft 5 whose movement is controlled to move forward and backward is fixed, and an appropriate number of needle bars 6 and female rods 9 arranged in parallel at equal intervals are suspended so as to be able to move up and down independently, and further, Each needle bar 6 and female bar 9 engages with an engaging portion 2a at an operating position opposite to the lifting member 2, and moves rearward in order to selectively drive the needle bar 6 or female bar 9 in the operating position up and down. Transmission rods 7 each having a protruding interlocking pin 8 attached thereto are arranged in parallel, and a circular edge 10a is provided at the lower end of the female rod 9 in order to punch a circular hole 21 in the fabric N. A knife 10 is attached to each needle bar 6, and a sewing needle 20 is attached to the lower end of each needle bar 6.

An annular relief groove 22a is formed in the throat plate 22 placed horizontally below the female rod 9, into which the edge 10a of the knife 10 that has descended is inserted. A cloth presser foot 23, which is normally biased downward, is arranged in parallel in order to clamp the vicinity of the incision site in the cloth between it and the throat plate 22 when the rod 9 descends.

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 lifting motion of the transmission rod 7 is transmitted to the sleeve 11 via the locking piece 13, and the female rod 9 is driven 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 drive gear 16 fitted to the motor shaft of a motor 15 installed on the side of the head body 1.
A key is rotatably driven via a driven gear 17 which is fitted to the rotary shaft 14 so as to be able to slide in the axial direction and to rotate together with the rotation shaft 14, and which is also fitted externally to the sleeve 11 and fitted into the keyway 11a. 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 through the worm wheel 18, which is engaged with a worm gear 19 that is fitted on the rotating shaft 14, and the female rod 9 is displaced to the operating position. is motor 1
5 rotates together with the sleeve 11 which is rotationally driven via the worm gear 19 and worm wheel 18, and the scalpel 10 is rotated around its axis while moving up and down.

Then, by the horizontal rotation of the edge 10a of the scalpel 10, which rotates and descends at the operating position with respect to the fabric N that has been stopped after being controlled to be transferred in a predetermined direction, a circular punch hole 21 is formed every time the scalpel rod 9 moves up and down. By repeating the punching operation, the punching holes 21 to 21 groups are connected in an endless chain along the contour R of the embroidery pattern, with the adjacent punching holes 21 slightly overlapping each other, thereby forming a chain punching. Piece of cloth N1 surrounded by 21 groups of holes
can be cut out from the fabric N and bored in accordance with the pattern of eyelets stitched into the fabric N.

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

Now, in this example, while the fabric N is intermittently transferred according to the pattern of eyelet pricking, the scalpel rod 9 to which the scalpel 10 having a circular edge 10a for cutting the fabric N is attached is This female rod 9
is rotated at the operating position where it is driven up and down, and the knife 1
0 rotation operation, each time the fabric N is stopped after being transferred, a round hole-shaped punching hole 21 is punched, and the punching holes 21 are connected in a chain along the outline of the pattern to be pierced by eyelets. It is structured as follows.

Therefore, when boring the fabric N, each punch hole 21 can be bored accurately and easily by the rotating operation of the scalpel 10, and the cut state of the bored eyelet can be improved and made uniform.

In addition, since the 21 groups of punching holes are connected endlessly to cut out the piece of cloth N1 surrounded by the 21 groups of punching holes, the number of operations of the female rod 9 can be reduced to form an eyelet, and the boring work can be reduced. It has the effect of increasing speed and efficiency.

(Effects of the Invention) That is, the present invention intermittently controls the transfer of the fabric according to the pattern of eyelet pricking, and at the same time uses a female rod to which a female having a circular edge is attached.
This scalpel rod is rotated at the operating position where it is driven up and down, and by the rotating operation of the lowered scalpel, each time it stops after being transferred, a round punch hole is punched into the cloth to form a group of punch holes. Since the eyelets are constructed so as to be connected in a chain along the outline of the eyelet stitching pattern, the eyelets corresponding to the eyelet stitching pattern can be formed accurately, and the cutting condition of the eyelets is improved and balanced. , it has the effect of making boring work more efficient.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the device used in the present invention, with Figure 1 being a longitudinal sectional view of the sewing machine head, Figure 2 being a front view, and Figure 3 being an enlarged view of the knife. A perspective view, FIG. 4 is an enlarged longitudinal sectional view of the main parts,
FIG. 5 is a plan view of the fabric illustrating the boring state. 9... Female rod, 10... Female, 10a... Edge, 21... Punch hole, N... Fabric.

Claims (1)

[Claims] 1. While intermittently controlling the transfer of the fabric according to the pattern of eyelet stitching, a female rod to which a scalpel with a circular edge is attached is rotated at an operating position where the female rod is driven up and down, By the rotating motion of the lowered scalpel, round punch holes are punched in the cloth each time the cloth is stopped after being transferred, and a group of punch holes are connected in a chain along the outline of the pattern to be pierced by eyelets. A method for boring fabric in a embroidery sewing machine characterized by: