JPS6334630Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) This invention relates to a presser foot device attached to a zigzag sewing machine, and particularly to a presser foot device suitable for hem stitching clothing.

(Prior Art) Blind stitching is often used in the sewing process of clothing. For example, in the case of pants, the lower end of the inner belt 21 is blind sewn to the inside surface of the pants, such as the inner pocket wall 24, as shown in FIG. Traditionally, this blind stitching has been done by hand because it is required to sew so that no seams appear on the surface of the garment. However, even if it is limited to the inner belt of pants, it costs 10 per piece.
Sewing had to be done in more than one place, which required a considerable amount of man-hours.

On the other hand, Union Special (registered trademark) is a sewing machine that can perform blind stitches like this.
There is a sewing machine for sewing mats.

However, this method has the disadvantage that the sewing thread easily unravels because it is a single chain stitch, and with conventional presser feet, it is difficult to position the pants, making it difficult to sew, and the seams may stick out on the surface of the pants, making it impractical. I couldn't offer it to him.

(Purpose) The purpose of this invention is to provide a presser foot device for easily and reliably blind stitching with a general-purpose zigzag sewing machine.

(Example) This invention will be described below based on an example shown in the drawings. In FIGS. 1 to 3, a cloth presser device 1 includes a presser plate 2 located below and a mounting handle 3.
This mounting handle portion 3 is attached to a presser foot attachment portion 4 of a zigzag sewing machine. The mounting handle part 3 has a constant width and is approximately L-shaped with its lower end bent at an obtuse angle, and a notch 5 is machined in its upper end for positioning it to the presser foot mounting part 4 of the sewing machine main body. There is. A hole 6 provided slightly below the upper end and at the center in the width direction is a hole for a mounting bolt (not shown) for the presser foot mounting portion 4.

The part beyond the bending of the lower end of the mounting handle part 3 is the foot part 3.
a, and near its tip, a connecting pin hole 7 is machined horizontally through the width direction. A screw hole 8 is machined at a substantially central portion of the foot portion 3a at a right angle to the surface and penetrates through the thickness of the plate, into which a presser plate angle adjustment screw 9 is screwed. This adjustment screw 9 and foot portion 3a
A loosening prevention spring 10 is inserted between the two.

On the other hand, the holding plate 2 has a basic shape in which a leading piece 2b and a gauge mounting piece 2c protrude from both sides of one side of a base 2a having a substantially square planar shape.

The lower surface of the base 2a is finished with a smooth flat surface,
A groove 11 having a width and depth slightly larger than the foot portion 3a of the mounting handle portion 3 is machined in the center portion of the upper surface. In front of the side wall of this groove 11, a bearing hole 1 is provided at a position corresponding to the coupling pin hole 7 of the foot portion 3a described above.
2 is machined through it.

A portion surrounded by the front edge of the base 2a and the inner side of the guide piece 2b and the base of the gauge attachment piece 2c forms a long hole running in a direction perpendicular to the groove 11. This is needle 25 (6th needle) of a zigzag sewing machine (not shown).
This is the needle drop hole 19 shown in Figure), and its length is set to be slightly larger than the maximum distance between the left and right sewing base lines 22 in zigzag stitching.

The leading piece 2b extends forward from the left front edge of the base 2a, and its bottom surface extends smoothly from the bottom surface of the base 2a and curves upward in an arched manner toward the tip.

The inner edge 13 is set so that when it is attached to a zigzag sewing machine, its plane position is parallel to the cloth feeding direction and slightly outside of the left sewing reference line 22.

Further, the gauge mounting piece 2c extends forward from the right front edge of the base 2a and faces the leading piece 2b, and its bottom surface is also smoothly connected to the bottom surface of the base 2a and gently curves upward toward the tip. It's on. A mounting seat 14 is machined into the upper surface of the gauge mounting piece 2c with a constant width and a constant depth in a direction perpendicular to the inner edge 13 of the leading piece 2b. This mounting seat 1
A screw hole 17 is provided in the center of 4.

The auxiliary gauge 15 is formed of a main body 15a of a constant width that can fit into the mounting seat 14, and a narrow reference piece 15b attached at right angles to the tip of the main body 15a. A long hole 16 is formed perpendicularly to 15b. This auxiliary gauge 15 has a long hole 16 and a screw hole 17 of the mounting seat 14.
It is fixed with mounting screws 18 at both ends.
In this state, the reference piece 15b is the leading piece 2 of the holding plate 2.
a, parallel to the inner edge 13, and the lower end of the reference piece 15b runs horizontally slightly above the lower surface of the presser plate 2. As a result, the tip of the reference piece 15b is located below the lower surface near the tip of the opposing leading piece 2a.

The presser plate 2 and the mounting handle 3 described above are integrally connected to each other by a connecting pin 23 in the connecting pin hole 7 and the bearing hole 12 so as to be able to swing within a small angular range.

The operation and effect of the presser foot device 1 configured as described above will be explained using blind stitching of the inner belt 21 of the screw 20 as an example.

In FIG. 6, the mounting handle 3 of the presser foot device 1 is fixed to the presser foot mounting portion 4 of the zigzag sewing machine. Next, the auxiliary gauge 15 is fixed by loosening the mounting screw 18, positioning it so that the distance between the reference piece 15b and the left sewing base line 22 of the blind stitch is approximately the seam allowance, and fixing the auxiliary gauge 15 with the mounting screw 18.

The pants 20 are folded in half to match the lower end of the inner belt 21 to be blind sewn, and the edge of the folded in half is aligned with the reference piece 15b of the auxiliary gauge 15 to determine its position. Next, the presser foot device 1 is lowered.

Incidentally, the inclination of the bottom surface of the presser plate 2 can be adjusted appropriately according to the fabric of the pants 20 and its thickness by rotating the presser plate angle adjustment screw 9.
In this state, the left side portion of the base 2a of the presser plate 2 and the leading piece 2b press down on the pants 20. After this, zigzag stitching is performed as usual. You can sew locally with fine stitches as shown in the picture, or you can sew continuously with coarse stitches. The tip of the reference piece 15b of the auxiliary gauge 15 is located below the lower surface of the leading piece 2b, so the edge of the folded half of the pants 20 is placed on the reference piece 15.
b.

And in this state (the edge of the pants 20 and the reference piece 1
By feeding the trousers 20 below the presser plate 2 while maintaining the state in which the trousers 5b and 5b are in contact with each other, the blind stitches can be sewn very reliably and quickly in the correct position.

(Effects) As explained above, this invention has the effect that by attaching it to a zigzag sewing machine, it is possible to perform oversewing of clothing extremely easily, reliably, and quickly.

[Brief explanation of the drawing]

Fig. 1 is a front view of a presser foot device which is an embodiment of the present invention, Fig. 2 is a side view thereof, Fig. 3 is a plan view thereof, and Fig. 4 is a state with the auxiliary gauge removed from the presser plate. 5 is a side view thereof, and FIG. 6 is a perspective view illustrating the usage state of the presser foot device 1 according to this embodiment. 2... Pressing plate, 3... Mounting handle, 13... Inner edge, 1
5... Auxiliary gauge, 15b... Reference piece, 19... Needle drop hole.

Claims (1)

[Scope of utility model registration request] In a presser foot device for a zigzag sewing machine, which is composed of a presser plate and a mounting handle, and the attachment handle is attached to a presser foot mounting portion of the sewing machine body, the presser plate is connected to a substantially square base and the front thereof. leading and gauge mounting pieces extending parallel to each other from both sides;
It is formed with a needle drop hole surrounded on three sides by the central part of the front side of the base and the inner side of the base part of the leading piece and the gauge attachment piece, and the inner edge of the leading piece is parallel to the left sewing base line of the zigzag stitch. A cloth presser for a zigzag sewing machine, characterized in that the gauge mounting piece is provided with an auxiliary gauge parallel to the inner edge of the leading piece and whose distance from the inner edge is adjustable.