JPH0114337B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a boring device for boring fabric following an eyelet pattern 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 stitching the eyelet, for example, a scalpel formed so that the fabric is incised in a ten shape is used to pierce the entire area within the eyelet area of the fabric. Because the eyelet was incised by piercing the eyelet over a long period of time, the incision performance of the scalpel deteriorated over time, causing the periphery of the incised eyelet to become untidy, and a portion of the thread within the eyelet area to be excised to be removed to be left uncut. However, there were problems such as an increase in the number of operations of the scalpel required for boring.

SUMMARY OF THE INVENTION An object of the present invention is to provide a boring device for a needle stitch sewing machine that can solve the above-mentioned problems and can boring an eyelet accurately and efficiently.

(Means for Solving the Problems) The present invention perforates a punch hole in the fabric every time the fabric is stopped, which is intermittently controlled to transfer according to the pattern to be stitched with an eyelet, and moves the fabric along the outline of the pattern to be stitched with an eyelet. A knife provided to continuously perforate a group of arranged punching holes has a planar projection figure forming a square edge, while a knife is provided to cooperate with the knife to shear the fabric. The gist of this invention is a boring device for a needle-stitch sewing machine that has a female hole with an opening edge having the same shape as the planar projection of the edge.

(Function) When boring an eyelet in a needle stitch sewing machine, the device of the present invention intermittently controls the transfer of the fabric according to the pattern to be stitched into the eyelet, and at the same time lifts and lowers a knife having an edge whose planar projection pattern is square. By a cooperative shearing action between the edge of this knife and the opening edge of a female hole made in the horizontal plate for inserting the knife, a punch hole is bored every time the fabric is stopped being transferred.
The eyelet is bored by repeatedly punching a group of holes along the contour of the eyelet.

(Example) Next, an example of the present invention will be described with reference to the drawings.

A command that stores X and Y data corresponding to the eyelet stitch pattern in order to intermittently control the movement of the fabric N to be stitched with the eyelet in the X and Y directions of the XY-axis plane orthogonal coordinate system according to the eyelet stitch pattern. In 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 the device, an elevating member 2 disposed at the front end of the head main body 1 of the sewing machine head M moves the head main body 1 It is linked to a crank mechanism (not shown) fitted to a main shaft 3 that passes through the main shaft 3, and is driven reciprocally 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 part of the main shaft 3. .

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 is connected to the slide case 4, and an appropriate number of needle bars 6 and female bars 7 arranged in parallel at equal intervals are suspended from the slide case 4 so as to be able to move up and down independently. At the same time, a transmission rod 8 provided opposite to each needle bar 6 and female rod 7 is suspended so as to be movable up and down, and is engaged with the transmission rod 8 at an operating position opposite to the elevating member 2. An interlocking pin 9 that engages in the section 2a and protrudes rearward to selectively drive the needle bar 6 or the female rod 7 up and down in the operating position, and a sleeve 10 that is fitted onto the upper part of the female rod 7. In order to connect the female rod 7 and the transmission rod 8 so that they can be raised and lowered together and the rotation of the female rod 7 is restricted by engaging the engaging groove 10a having a U-shaped cross section formed circumferentially at the lower end. A locking piece 11 extending forward and having a substantially U-shaped plane is attached to each of the female rods 7 and 7, and when the female rod 7 is displaced to the operating position together with the transmission rod 8, the female rod 7 is connected to the elevating member 2 via the interlocking pin 9. The transmission rod 8 moves up and down, and the female rod 7 is driven up and down in conjunction with the transmission rod 8.

The scalpel 12 is attached to the lower end of the scalpel rod 7 in order to continuously punch a group of punching holes H arranged along the outline of the pattern to be eyelet-pierced by punching punching holes H every time the transfer of the fabric N is stopped. At the lower end, an endless edge 12a is formed which has a square planar projection and an arcuate side profile in order to punch a square hole H in the fabric.

The horizontal plate 13 is placed horizontally below the female rod 7 that has been displaced to the operating position, and the female rod 7 that has been lowered is attached to the horizontal plate 13.
A female hole 14 having an opening edge 14a formed in a square having the same shape as the plane projection figure of the edge 12a of the knife 12 is opened in order to shear the fabric N in cooperation with the knife 12. Opposite.

The presser foot 15 is fitted to the lower part of the female rod 7 in order to press the periphery of the punching hole H in the fabric N in an annular manner between it and the horizontal plate 14 when punching the punching hole H, and is normally attached downward by a spring 16. Forced.

Then, the edge 12a of the knife 12, which has descended in the operating position, is inserted into the fabric N, which has been stopped after being transferred according to the eyelet stitching pattern, and is cut into a square punch by shearing action with the opening edge 14a of the knife hole 14. At the same time as the holes H are perforated, the above-mentioned perforation operation is repeated every time the transfer of the fabric N is stopped, and a group of punching holes H arranged along the outline of the pattern to be pierced are endlessly punched, and the punching holes are punched out from the cloth N. The piece of cloth N1 surrounded by the holes H can be cut out and eyelets can be bored.

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

Now, in this example, each time the fabric N is stopped, the transfer of which is simply controlled in accordance with the eyelet stitch pattern, punch holes H are punched in the fabric N, and the punch holes are arranged along the outline of the eyelet stitch pattern. The knife 12 provided to continuously punch the hole H group forms an edge 12a with a square plane projection figure, while the horizontal plate 13 placed horizontally on the lower side of the fabric N cooperates with the knife 12. Edge 1 of the scalpel 12 for shearing the fabric N
A female hole 14 is provided with an opening edge 14a having the same shape as the plane projection figure 2a.

Therefore, when boring an eyelet in the fabric N, the edge 12a of the knife 12 and the knife hole 14
By the cooperative shearing action with the opening edge 14a of the eyelet, each punch hole H is reliably and accurately drilled, the cutting edge of the eyelet is made even, and the cutting performance for the fabric N can be ensured over time. .

In addition to the square, a triangle, a rhombus, a rectangle, a hexagon, etc. can be used as the plane projection figure of the edge 12a of the knife 12.

In addition, as shown in FIG. 7, the slide case 4
The motor shaft 1 of the control motor 17 is
A worm wheel fitted onto the female rod 7 is attached to the upper drive shaft 20, which is fitted with a driven gear 19 which is rotatably driven by meshing with the driving gear 18 fitted to the drive gear 7a, and which is slidable in the axial direction. A worm gear 22 for rotationally driving the female rod 7 by meshing with the upper drive shaft 21 is fitted, and the control motor 17 is rotationally controlled prior to each lifting operation of the female rod 7 to control the rotation of the scalpel 12. A female hole 1 is provided in the lower drive shaft 24 which is connected to the lower drive shaft 20 via a belt 23 so as to be able to rotate together with the lower drive shaft 20.
A worm gear 27 is fitted to engage with a worm wheel 26 formed on the knife receiving member 25 in which the knife receiving member 4 is opened, and rotate the knife receiving member 25 synchronously with the knife 12. It is also possible to control the rotation of the female hole 14 synchronously so that the cut edge E of the eyelet to be bored is continuous in a straight line or a curved line as shown in FIG.

(Effects of the Invention) That is, the present invention perforates punch holes in the fabric every time the fabric is stopped, which is intermittently controlled to transfer according to the eyelet stitch pattern, and arranges the holes along the outline of the eyelet stitch pattern. A knife provided to continuously punch a group of punching holes has a rectangular edge with a planar projection figure, and a knife provided on the knife has a rectangular edge formed in a planar projection pattern, and a knife is provided with an edge of the knife to cooperate with the knife to shear the fabric. By arranging female holes having opening edges of the same shape as the planar projection figure so that they can be inserted and removed, each punching hole can be reliably and accurately drilled and the eyelet can be accurately bored according to the pattern to be inserted into the eyelet. At the same time, it has the effect of ensuring the cutting performance of the fabric over time.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view of the sewing machine head, Fig. 2 is a front view of the same, Fig. 3 is an enlarged longitudinal sectional view of the main parts, and Fig. 4 is an enlarged view of the knife. The longitudinal cross-sectional view, FIGS. 5 and 6 are plan views of the fabric to explain the boring state, respectively, and FIG. 7 is a schematic side view to explain the rotation control mechanism of the knife and the knife hole. 12... Female, 12a... Edge, 14... Female hole, 14a... Opening edge, H... Punch hole, N...
fabric.

Claims (1)

[Claims] 1. In order to continuously punch a group of punch holes arranged along the contour of the eyelet stitch pattern by punching punch holes in the fabric every time the fabric whose transfer is controlled intermittently according to the eyelet stitch pattern is stopped. The provided knife has a planar projection figure forming a square edge, while the knife has an opening edge having the same shape as the planar projection figure of the edge of the knife in order to cooperate with the knife to shear the fabric. A boring device for a needle-stitch sewing machine, characterized in that female holes with two holes are arranged opposite each other so that they can be inserted and removed.