JP3396238B2 - How to Boring Cloth with Embroidery Sewing Machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of boring the inside of an eyelet pattern prior to the formation of an embroidery stitch in an eyelet embroidery (piercing embroidery) by an embroidery sewing machine. It is. 2. Description of the Related Art Most of conventional eyelet embroidery is performed by the following method. (1) As shown in FIG. 8, a boring knife 51 having an inverted quadrangular pyramid-shaped cutting blade is attached to a sewing machine head (not shown), and a round hole-shaped female hole 52 into which the boring knife 51 is loosely inserted and removed. Is formed on the needle plate 53 in advance. (2) When the eyelet pattern is, for example, a circular pattern, as shown in FIG. 9, the cloth 54 is intermittently moved in a cross shape within the circular pattern, and as shown in FIG. The cloth 51 is moved up and down to pierce the cloth 54, thereby forming a cross-shaped incision line 55 in the cloth 54. Therefore, the remaining pieces 56 of the fabric 54 remain in the circular pattern in a saw-tooth shape. (3) Next, as shown in FIG. 10, embroidery stitches are formed along the circular pattern to form embroidery stitches 57. At this time, if the cloth 54 is thin and the waist is weak,
6 is completely wrapped in the embroidery stitch 57 by the tightening action of the embroidery thread to form a beautiful circular patterned eyelet with a smooth peripheral edge. However, when the fabric 54 is thick and strong, as shown in FIG. 10, the residual piece 56 is not completely involved in the embroidery stitch 57, and a part of the remaining piece 56 extends from between the embroidery stitch 57 to the inside of the eyelet 58. However, the embroidery stitch 57 bulges into the eyelet 58 even if the remaining piece 56 is entangled, and there is a problem that an irregularly shaped eyelet 58 is formed. Therefore, a method of boring a through hole having substantially the same shape as an eyelet pattern on a cloth has been considered so far in order to prevent the residual piece 56 from remaining during boring. Had occurred. For example,
In Japanese Patent Publication No. 1-14336, a scalpel having a circular edge is rotationally driven to form a circular hole in a cloth,
Although a method of connecting the punched holes in a chain along the eyelet pattern is shown, this method has a problem that a mechanism for rotating and driving the knife is required. [0005] Also, Japanese Patent Publication No. 1-14337 discloses that
Due to the shearing action of a scalpel with a square-shaped opening edge as well as a scalpel with a square-shaped edge, a square-shaped hole is drilled in the fabric, and this group of holes is converted to an eyelet pattern. A method is described in which the scalpel and the scalpel hole are difficult to form, or the pitch setting of the intermittent movement of the fabric is inappropriate. Although there is no clear description of the pitch, according to the drawings, the pitch is large, and the overlapping of the perforations is extremely small.) there were. Japanese Patent Application Laid-Open No. 2-151659 discloses a method in which a punch having substantially the same shape as the eyelet pattern is punched at once by vertically moving a punch having a shape substantially the same as the eyelet pattern. However, this method has a problem in that a dedicated punched body must be formed for each different eyelet pattern. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to use a simple embroidery sewing machine so that a boring can be surely performed without leaving a through hole having substantially the same shape as an eyelet pattern on a cloth. An object of the present invention is to provide a new method of boring a fabric, which can form a beautiful eyelet with a smooth peripheral edge when forming an embroidery stitch. In order to achieve the above object, in the method of boring a fabric according to the present invention, one needle bar of a multi-needle sewing head is positioned at an equal position to another needle. Using a solid round bar-shaped boring knife attached to eliminate the offset with respect to the needle, and a round hole-shaped needle hole and female hole formed on the needle plate through which the boring knife is inserted with a small clearance, By intermittently moving the boring knife according to the eyelet pattern at a pitch equal to or less than 1/2 of the diameter of the boring knife. After forming a large number of piercing holes connected to each other along the eyelet pattern in the cloth, a measure was taken to remove the cutout pieces of the cloth cut out by the piercing holes. Here, the "boring knife" can be attached to one needle bar of a multi-needle sewing head, for example, at a position offset from other needles or at a position equivalent to other needles. it can. Correspondingly “scalpel hole”
For example, a needle plate attached to a table can be provided as a female hole dedicated to boring, or a conventional needle hole can be provided so as to be shared as a needle hole and a female hole. However,
Enlarge, reduce, rotate, etc. embroidery patterns in the sewing machine controller
The boring scalpel can be easily realized.
Is preferably the latter, and the female hole is also preferably the latter. According to the boring method of the present invention, the structure of the embroidery sewing machine can be simplified since the rotating mechanism of the boring knife is not required. In addition, the shearing action of the boring knife and the knife hole which is inserted and withdrawn with a small clearance allows the thread of the fabric to be reliably cut to form a piercing hole, and the pitch of the intermittent movement of the fabric is the diameter of the boring knife. Of the piercing holes, and thus the overlapping of the piercing holes is large, so that the piercing holes are reliably connected without being left uncut. By forming a large number of piercing holes along the eyelet pattern in this way and removing the cutout pieces of the fabric cut out by the piercing hole group, a through hole having substantially the same shape as the eyelet pattern appears. Therefore, a beautiful eyelet having a smooth peripheral edge can be formed when the embroidery stitch is formed later. FIG. 1 shows a first embodiment in which the present invention is embodied in a method of boring a fabric by a multi-needle embroidery sewing machine.
This will be described with reference to FIGS. First, the outline of the main parts of the embroidery sewing machine will be described. The sewing head 1 is provided with seven needle bars 2 which are driven up and down at predetermined intervals in an arc shape. Needle stopper 3 for 6 needle bars 2 except for the central needle bar 2
For example, a needle 4 having a diameter of 20 (diameter: 1.22 mm) is fixed to the center needle bar 2, and instead of the needle 4, a solid round bar-shaped boring knife 5 having a diameter of, for example, 1.62 mm is also provided by the needle stopper 3. It is fixed. The boring knife 5 has a cutting edge 6 formed by cutting a central portion of a front end surface (lower end surface) of a solid round bar into a valley shape. As described above, the boring knife 5 is connected to the other needle 4
Therefore, the offset of the boring knife 5 with respect to the needle 4 is zero. Each of the needles 4 and the boring knife 5 is provided with a cloth presser 8 having an insertion hole 7 in parallel, and a rubber ring 9 is attached to a lower surface of the cloth presser 8. As shown by a chain line in FIG. 1, the needle 4 and the boring knife 5 are configured to be moved in an arc so that objects to be driven up and down sequentially come to the center of the front. A rectangular mounting hole 11 is formed in the table 10 of the embroidery sewing machine, and a bed (not shown) is arranged below the mounting hole 11. The mounting hole 11 has a thickness of about 2m.
The needle plate 13 of m is dropped so as to be substantially flush with the table 10, and the needle plate 13 is detachably attached to the bed by a plurality of flathead screws 14. In the needle plate 13, the needle 4 or the boring knife 5 is inserted / removed at a position corresponding to the needle 4 or the boring knife 5 which has been circularly moved to the front center as described above.
For example, a round needle-shaped and female hole 15 having an inner diameter of 1.8 mm is formed. Therefore, in particular, the boring knife 5 is inserted and removed with a small clearance of about 0.09 mm in the needle hole and knife hole 15. The eyelet embroidery by the embroidery sewing machine is performed as follows. (1) First, as shown by a chain line arrow in FIG. 1, the boring knife 5 is circularly moved to the front center. (2) As shown in FIG. 2, when the eyelet pattern is, for example, a circular pattern, the cloth 21 spread on an embroidery frame (not shown) is, for example, 0.4 mm pitch (boring knife 5) according to the circular pattern. (Approximately 1/4 of the diameter). Then, as shown in FIG. 3, each time the intermittent movement is stopped, the boring knife 5 is moved up and down without rotating, and is inserted into and pulled out from the fabric 21 and the needle hole and knife hole 15, thereby forming a circular pattern on the fabric 21. A large number of piercing holes 22 are formed along with each other. At this time, due to the shearing action between the boring knife 5 and the needle hole and knife hole 15 which is inserted and withdrawn with a small clearance, the thread of the cloth 21 is reliably cut and the piercing hole 2 is cut.
2 can be formed, and the pitch of the intermittent movement of the cloth 21 is sufficiently small. Therefore, as shown in FIG. It is surely connected without anything. Further, in the present embodiment, the boring is performed in a state where the cloth 21 is pressed by the cloth presser 8 and the rubber ring 9, so that the expansion of the cloth 21 is reduced, and the uncut portion can be more reliably eliminated. (3) Subsequently, as shown in FIG.
If the cutout pieces 23 of the cloth 21 cut out by the two groups are removed by means of, for example, tweezers 24, air jet, vacuum suction, or the like, a through hole 25 having substantially the same shape as the circular pattern appears. Therefore, no sawtooth-shaped residual piece remains in this through-hole 25 as in the related art. (4) For this reason, as shown in FIG. 6, by performing embroidery sewing along the circular pattern and forming the embroidery stitch 26, an eyelet 27 having a smooth circular pattern and a beautiful circular pattern is provided.
Can be formed. This effect can be obtained even when the cloth 21 is thin and the waist is weak, even when the cloth 21 is thick and strong such as felt, denim, natural or artificial leather, etc.
The same is true. Further, in the present embodiment, the offset of the boring knife 5 with respect to the needle 4 is eliminated, and the needle hole and knife hole 1 is removed.
Since the sewing machine 5 is used in common, enlargement, reduction, rotation, and the like of the embroidery pattern can be easily realized in the sewing machine control device. Next, the boring method of the present embodiment shown in FIG. 7 differs from the first embodiment only in the way of providing a boring knife and a female hole of an embroidery sewing machine to be used.
That is, in this embroidery sewing machine, the boring knife 5 is fixed to the rightmost needle bar 2 by a knife stop 16, and the boring knife 5 is moved forward with respect to the needle 4 by, for example, 1 mm.
It is offset by 5 mm. In addition, a needle hole 17 and a female hole 18 having a round hole shape are separately formed in the needle plate 13 corresponding to the offset. The eyelet embroidery method by the embroidery sewing machine is the same as that of the first embodiment.
The same operations and effects as those of the first embodiment are obtained except that the program work such as rotation is more complicated than that of the first embodiment. The present invention is not limited to the configuration of the above embodiment, and may be embodied by appropriately changing the shape of the boring knife and the female hole without departing from the spirit of the invention. You can also. The method of boring a fabric using an embroidery sewing machine according to the present invention is configured as described above, and a through hole having substantially the same shape as the eyelet pattern is cut in the fabric by the embroidery sewing machine having a simple structure. Bowling can be done reliably without leaving, so when forming embroidery stitches later,
The peripheral edge is smooth and can form a beautiful eyelet ,
In addition, enlargement, reduction, and
This provides an excellent effect that rolling and the like can be easily realized .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a main part of an embroidery sewing machine used in a first embodiment of the present invention. FIG. 2 is a perspective view of the fabric during boring in the first embodiment. FIG. 3 is a sectional view of the same during boring. FIG. 4 is an enlarged plan view of a piercing hole formed in the same manner. FIG. 5 is a perspective view when the formed cutout is removed from the fabric. FIG. 6 is a perspective view of a fabric on which an embroidery stitch is formed after the boring. FIG. 7 is a perspective view of a main part of an embroidery sewing machine used in the second embodiment. FIG. 8 is a sectional view at the time of boring in a conventional example. FIG. 9 is a perspective view of the same boring cloth. FIG. 10 is a perspective view of a fabric on which an embroidery stitch is formed after the boring. [Description of Signs] 1 Sewing machine head 5 Boring knife 10 Table 13 Needle plate 15 Needle hole and knife hole 18 Female hole 21 Cloth 22 Piercing hole 23 Cutout piece

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-106777 (JP, A) JP-A-61-238425 (JP, A) Patent 3352103 (JP, B2) JP-B-1-14337 (JP, A) B2) Japanese Patent Publication No. 59-36023 (JP, B2) (58) Field surveyed (Int. Cl. ⁷ , DB name) D05C 7/04

Claims (1)

(57) [Claim 1] A solid round bar-shaped boring knife in which a needle bar of a multi-needle sewing machine head is mounted at a position equivalent to that of another needle to eliminate offset with respect to the needle. And formed on the needle plate
Using the round hole-shaped needle hole and knife hole which the boring knife inserts and removes with a small clearance, the fabric is intermittently moved at a pitch of 1/2 or less of the diameter of the boring knife according to the eyelet pattern. By moving the boring knife up and down without rotating the boring knife each time the movement is stopped, and inserting and removing it into the fabric and the needle hole and knife hole, after forming a large number of piercing holes connected to each other along the eyelet pattern on the fabric,
A method of boring a fabric using an embroidery sewing machine, wherein a cutout piece of the fabric cut out by the piercing hole group is removed.