JPS6279093A - Production of metal presser of 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 (Field of Industrial Application) The present invention relates to the manufacture of a presser foot for pressing down a presser foot which is detachably attached to a holder at the lower end of a presser foot cup of a sewing machine.

(Prior Art) In order to horizontally suspend a connecting shaft between a pair of support pieces protruding from the left and right sides of the surface of the presser foot body, conventionally, Japanese Patent Application Laid-Open No. 1g (59-9059)
As shown in the No. 2 public paddle, there is one in which the connecting shaft is not driven between a pair of support pieces, but is built into the cylinder together with the presser foot body.

To explain this conventional method with reference to FIG. 514 and FIG. If a protrusion with a circular lower groove is provided, and a recess d that fits into the protrusion is provided in the I-type C, a groove with a semicircular cross section will be formed on the bottom of the recess d. Form.

Then, a molding material is injected into the cylindrical cavity between the lower groove and the first groove, and the cylindrical connecting shaft S is molded together with the support pieces N, N of the main body M to form a presser foot.

Insert the tip of the removable bottle P provided in the holder H provided at the F end of the presser cup into the lower surface of the connecting shaft S (-) and place the plaster and metal onto the holder H. Let's go.

(Problems to be solved) 1. When using this conventional method, the protrusion of the lower mold a is removed from the presser foot body M as shown in Figure 6. It is inevitable that a hole will occur in lh>.

Also, depending on the 71'' ground, there is a drawback that it gets caught in the through hole and does not move smoothly from lIJ ground.

In the comparative invention, the presser foot is 11mm thick to prevent such a hole from forming.
1! Casting together with Yusuke is [1 target].

(Step f for solving the problem!!) To explain the uninvented embodiment shown in FIGS. 1 to 4, soil polymerizes on the lower mold l of the mold, A pair of left and right branches N, N of the presser foot main body M (corresponding to this, the entire space 3.3 is sunk 6 and the empty space 3° 3 is connected I!l!) I44
is recessed from the cavity 5 corresponding to the main body M toward the do surface of the H shape 2.

Numeral 6 is a slide pin which is inserted into the L-shape 2 obliquely from the 1+f plane of the 1-shape 2 so as to be freely removable, and its tip enters halfway into the communication groove 4 without penetrating it.

7 is an inclined guide rod installed diagonally in the 1.'' type 1, and is inserted into an inclined hole drilled in the base 6a of the slide I. Look into the space 8 in the vertical direction of the J+ hole drilled in the mold 2.

The base 6a of the slide pin 6 is placed on the back of the 1-type 2.
The boat moves diagonally downward within the notch 9 onto diagonal guide rails 10 provided on both the left and right sides of the sunken notch 9.

Then, after injecting the molding material into the cavity 5 from 111 between the lower mold 1 and the upper mold 2, the mold 2 is turned toward the upper blade and removed.

(Function) When the molding material is injected into the cavity 5 from the injection gate 11 between the lower mold 1 and the mold 2, the molding material flows from the cavity 5 to the left and right spaces 3.3 and the tip of the slide pin 6. The communication groove 4 that enters halfway is filled, so wait for the molding material to solidify and then turn the mold 2 in the L direction and remove it. The slide pin 6 is guided by the inclined guide rod 7 and moves into the lower mold 2 It automatically moves toward the back side of the screen and comes out from the communication groove 4.

Then, a presser foot body M connects the left 711 pairs of supports H-N and N by a connecting shaft 13 that forms a recess 12 in the center portion.
or produce.

(Example) 4. The molding material in the invention is preferably a hard synthetic resin or a zinc alloy. In addition, in FIG. 1, the opposing projections 14 of the lower die 1 and the J-type 2 cause the
A hole 15 is then formed.

(Effect of the invention) According to the present invention, after waiting for the molding material to solidify,
, + (When +42 is turned toward L and removed, the slide pin 6 automatically moves toward the back of the 1-type 2 and comes out from the communication groove 4, so the 6 unpin P of Polter H is located at the bottom center. The connecting shaft 13 forming a recess 12 with which the tip of the connecting shaft 13 engages can be used to construct a main body M that is horizontally suspended between a pair of left and right branches N, N, and is similar to the conventional υ and Nyoru shown in FIG. There is no hole in the main body M where the material gets caught.

Therefore, when the tip of the slide pin 6 passes through the communication groove 4, a gap is generated on the outer periphery of the tip of the slide pin 6 that protrudes from the communication groove 4, but according to the present invention, the tip of the slide pin 6 passes through the communication groove. Since it does not penetrate 4, Paris does not occur.
This effect also occurs.

[Brief explanation of drawings]

FIG. 1 is a longitudinal side view of the lower mold according to the invention, FIG.
The figure is a vertical 1E side view of the presser foot, FIG. 3 is a slope view of the presser foot produced according to the present invention, FIG. 4 is a vertical side view taken along the line ■-■, and FIG. 5 is a conventional method FIG. 6 is a vertical side view of a presser foot produced by a conventional method. ■ is the lower mold, 2 is the 1-mold, 3 is the void, 4 is the communication groove, 5 is the cavity, 6 is the slide pin, 7 is the inclined guide rod, 11 is the injection [1°

Claims (1)

[Claims] On the left and right sides of the lower surface of the upper mold (2) superimposed on the lower mold (1), there are spaces (3) (3) corresponding to a pair of left and right branches N, N of the presser foot body M.
) is provided, and a communication groove (4) connecting the spaces (3) (3) is provided above the cavity (5) corresponding to the main body M (
2) The tip of the slide pin (6), which is recessed toward the lower surface and inserted into the upper mold (2) so that it can freely go in and out from the back side of the upper mold (2), should not pass through the communication groove (4). Insert the inclined guide rod (7) installed diagonally in the lower mold (1) into the inclined hole drilled at the base of the slide pin (6), and then insert it into the cavity (5) from the injection port (11). A method of manufacturing a presser foot for a sewing machine, which is characterized by injecting a molding material into the mold, and then removing the upper mold (2) by turning it upward.