JPS637795B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This is an invention of a presser foot used when sewing decorative strings with a sewing machine.

(Prior art) As shown in Fig. 4 A and B, the conventional presser foot for attaching a string has a through hole drilled at one end of a spring plate c for holding the string fitted into a protrusion b' on one side of the front side of the main body a. The upper end of the protrusion b was crushed and caulked by hitting it.

(Problem to be solved by the invention) However, if the protrusion b is crushed too much, the protrusion plate c
The free end of the cord curves upward as shown by the chain line in Figure 4 (b), and the cord m cannot be compressed by the spring plate c.
There was a risk that the string might come loose.

As described above, the conventional method not only requires skill to attach the spring plate, but also has the drawback of increasing the number of parts such as the spring plate c.

The object of the present invention is to eliminate this drawback and to mold the string holding part from metal or synthetic resin integrally with the main body in one step using an upper mold and a lower mold, without using a spring plate.

(Means for solving the problem) A notch groove 3 is bored from one side of the main body 1 in front of the needle drop hole 2, and a string passing hole 4 with a diameter larger than the width of the notch groove is formed in the notch groove 3. installed approximately perpendicular to the

(Function) The string taken out from the string guide groove 5 provided on the back side of the main body 1 in the front-rear direction through the needle drop hole 2 to the surface of the main body 1 is passed from one side of the main body 1 through the notch groove 3 and into the string passing hole 4.
, and the string is sewn onto the cloth using a sewing machine needle (not shown) that moves up and down within the needle drop hole 2.

(Embodiment) In the illustrated embodiment, the string passing holes 4 are provided only at the end points of the notched grooves 3, but several string holes 4 may be provided in the middle to sew several threads of string at the same time.

(Effects of the Invention) According to the present invention, the string can be easily passed from one side of the main body 1 through the notched groove 3 and into the string passing hole 4 having a diameter larger than the width of the notched groove 3 while pressing the string. Since the string passing hole 4 is substantially perpendicular to the main body 1, the main body 1 can be molded from metal or synthetic resin in one step using split upper and lower molds, making it suitable for mass production. .

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of the embodiment of the present invention, Fig. 2 is a sectional view along the arrow in Fig. 1, Fig. 3 is a bottom view of the main body, Fig. 4 A is an oblique view of the conventional product, and B is its sectional view. A cross-sectional view along the arrow. 1 is the main body, 2 is the needle drop hole, 3 is the cutout groove, and 4 is the string hole.

Claims (1)

[Claims] 1 A presser foot for attaching a string to a sewing machine, which has a cutout groove cut from one side of the main body in front of the needle drop hole, and a string threading hole with a diameter larger than the width of the cutout groove is provided in the cutout groove approximately perpendicular to the main body. .