JPS6045380A - Linking stitch of eyelet part of eyelet and button hole in sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to stitching using a lockstitch sewing machine to prevent tearing of the eyelet hole of a lockstitch sewing machine.

(Prior art) The first example of stitching an eyelet buttonhole using a lockstitch sewing machine
As shown in the figure. As shown in the figure, a seam 2 is formed around the eyelet hole 1 where the button is located when in use, and although it has a fraying prevention effect, it does not have much of a reinforcing effect and prevents the button from being placed during use. There is a problem in that the eyelet hole portion 1 tends to tear when subjected to force through the thread.

Fig. 2 shows an example of eyelet stitching using a lockstitch sewing machine. The seam 4 around the eyelet hole 3 is similar to the seam 2 near the eyelet hole 1 in FIG. 1, and has the problem of being easily torn due to its strength as described above.

(Objective) An object of the present invention is to provide a hook stitch that has improved overlocking strength against tearing of the eyelet hole and eyelet hole portion of a buttonhole by a lockstitch sewing machine.

(Example) The present invention will be explained below with reference to an example. In Figure 3,
The eyelet buttonhole overlock is composed of a bar tack seam 6 at the end 5- of the cut line 5, a right line tack 7, an overlock stitch 9 around the eyelet hole part 8, and a left line tank 10.

The needle entry procedure for overlock stitch 9 is as shown in Figure 4.
The steps are as follows: b, c, d, e, f, g, and the overlock stitch 9 consists of the tangent group U of the approximately X-shaped unit consisting of needle drops a, b, c, and d, needle drop d, e, f.

The tangent group U- of the next unit consisting of g is sewn continuously,
In addition, it is a stitch formed by partially overlapping the shape of the unit raphe group U sewn previously with the shape of the sub-braid line group U' to be sewn next.

To explain in detail, the unit tangent group is composed of the first, second, and third string lines shown below, and the first string line (△) has a width approximately equal to the radius of the eyelet hole 8. Sewing point <a> on concentric circle V with a larger radius and sewing point near eyelet hole 8 (b)
The second string line B is a string line that is inclined at a small angle (α) with respect to the line segment that connects the sewing point (a > and the center 0 of the radius of the eyelet hole part 8). A string line connecting the sewing point (b) near the eyelet hole section 8 and another new sewing point (C) near the eyelet hole section 8, forming an acute angle with respect to the first string line △, and forming a third String line C
is a string line connecting another sewing point (C) near the eyelet hole 8 and a new other sewing point (d) on the concentric circle V, and
This is a string line that makes an acute angle with respect to the string line B and intersects with the first string line A, and the unit tangent group U is approximately X-shaped as described above.

Overlock stitch 9 is a unit tangent group U that is sewn consecutively,
The second set line BfjN, which is the horizontal part of the shape part, is located on the eyelet hole 8 side, and is the shape part of the unit raphe group U- that is sewn next to the v-shaped part of the tangent line group U of the previously sewn unit. are formed by partially overlapping.

The needle drop of the overlock stitch 9 is performed by the sewing machine's cloth feed control and needle amplitude control.

According to the overlock stitch 9 according to the embodiment of the present invention, when the button comes to the side of the eyelet hole 8, the string line overlaps in the vicinity of the eyelet hole 8 as described above. Because I am doing
It has sufficient strength to withstand tearing.

In addition, when the button comes near the end 5- of the cut line 5, since there is a bartack seam 6 close to the end, it goes without saying that the button has sufficient strength against tearing.

In Fig. 5, the eyelet stitch 11 is the same stitch as the eyelet buttonhole stitch 9, and the string line near the eyelet hole 12 is sewn overlappingly, so it is easy to prevent tearing. It has sufficient strength.

(Effects) As described above, according to the present invention, it is possible to provide an overlock stitch with improved hooking strength against tearing of the eyelet hole and the eyelet hole portion of a buttonhole by a lockstitch sewing machine.

[Brief explanation of the drawing]

Figures 1 and 2 are related to the conventional example, Figure 1 is a diagram showing the main parts of eyelet buttonhole stitching, Figure 2 is a diagram showing eyelet buttonhole stitching, and Figures 3 to 5 are according to the present invention. Regarding the example of
FIG. 3 is a diagram showing eyelet buttonhole stitching, FIG. 4 is a diagram showing details of the main part of FIG. 3, and FIG. 5 is a diagram showing eyelet buttonhole stitching. 8.12 is the eyelet hole part, 9.11 is the overlock seam, U, U-
is the unit tangent group. Patent applicant Janome Sewing Machine Industry Co., Ltd. Figure 1 Figure 3 Factor 6 Figure 4 Figure 5 47Q-

Claims (1)

[Claims] Today, when sewing the eyelet hole and the eyelet hole part of button 4 (-) with the sewing machine, the ridgeline group h of the unit, which is approximately in the shape of an An eyelet hole for a lockstitch sewing machine and an eyelet hole for a buttonhole are used in a lockstitch sewing machine characterized in that the shape part of a group of latitude lines of the next unit to be sewn partially overlaps with the shape part of a group of latitude lines of a unit to be sewn. IJI iJ~ri seam of the section.