JP2660258B2 - Manufacturing method of hairpin top pin - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a hairpin top pin in which a lower holding piece and an upper hair pressing piece are connected at one bent portion.

[0002]

2. Description of the Related Art Conventionally, a hair stopper provided with a spring attached to a connecting portion between a lower holding piece and an upper hair pressing piece constituting the same or a top pin actually used as a top pin.
As is known in Japanese Patent No. 593, a single metal plate is formed into a substantially angled shape by stamping or the like, and the tips of the two metal plates outside the angled metal plate are brought together in the direction of each other to form a rivet or the like. To provide elasticity to both outer metal plates, that is, the upper hair press pieces.

[0003]

In the conventional hair stopper,
As described above, since the spring is attached to the connecting portion between the lower holding piece and the upper hair pressing piece, which constitutes the same, the manufacturing process is complicated, and the cost is relatively high. Was. Further, in the top bottle of Japanese Utility Model Application Laid-Open No. 52-66593, one metal plate is formed into a substantially angled shape by stamping or the like, and the tips of both metal plates outside the angled metal plate are oriented in the direction of each other. In a method of manufacturing a clip (top pin) in which both outer metal plates, that is, upper hair pressing pieces are resiliently attached to each other by rivets or the like and connected by rivets or the like, a step of riveting that is difficult to automate is added. At the same time, the riveted connection tends to be insufficiently connected, the connection is easily separated during manufacturing and use, and the frequency of defective products increases. Was. The present invention solves the above-mentioned drawbacks and eliminates the need for a separate spring member or riveting, which is unsuitable for mass production and requires a complicated and separate process. An object of the present invention is to provide a method for manufacturing a top pin for a hair stopper, which can obtain resilience and does not generate defective products.

In order to achieve the above-mentioned object, a lower holding piece and an upper hair pressing piece are provided on the left and right of substantially the center of a flat, straight spring steel, respectively. There is a disc-shaped through hole that is punched out in the longitudinal direction of the pressing piece and swells at the center by strongly pressing the circular pressing parts at both ends of the long hole, and furthermore, a chevron-shaped protrusion almost at the center of the lower holding piece In the state where the upper hair pressing piece and the lower holding piece are joined to each other, the chevron-shaped projection of the lower holding piece projects upward to the substantially central position of the disc-shaped through hole. And a method for manufacturing a hairpin top pin bent at a bent portion.

[0005]

The lower holding piece and the upper hair pressing piece that constitute the hairpin top pin are connected at one side bent portion, and are punched in the longitudinal direction of the upper hair pressing piece and have circular shapes at both ends of the long hole. By making a disc-shaped through-hole that swells out at the center by strongly pressing the pressing part, a strong elastic resilience in the vertical direction of the upper hair pressing piece is obtained, and the lower side that is spaced apart for hair-stopping operation The lower holding piece and the upper hair pressing piece are resiliently joined so that the outer end of the piece and the outer end of the upper hair pressing piece are pressed against each other, and the hair is stopped. Conversely, the lower holding piece and the upper hair press piece are bent upward so as to bend the center of the lower holding piece and the upper hair press piece in the hair-stopping state so that the resilient joining between the lower holding piece and the upper hair press piece is released. It is.

[0006]

An embodiment will be described with reference to the drawings. 1 to 3, a lower holding piece 1 and an upper hair pressing piece 2 are integrally connected at a one-side bent portion 3, and the whole is formed of spring steel. A long and narrow disc-shaped long hole 4 is formed in the longitudinal direction of the upper hair pressing piece 2, and a frame plate 5 is formed along the outer shape of the long hole 4 so that the center portion thereof protrudes. Further, the lower holding piece 1 has a slightly narrower central portion, an elongated hole 6 formed in the central portion thereof, and a mountain-shaped projection 7 provided in the central portion. The upper hair pressing piece 2 is configured to repel upward or downward with the horizontal position a as a critical point. When the lower holding piece 1 and the upper hair pressing piece 2 are in a hair stopper state, as shown in FIG.
The upper hair pressing piece 2 and the upper hair pressing piece 2 are substantially joined. In order to release the hair-stopping state, the central part of the lower holding piece 1 and the upper hair pressing piece 2 is pushed upward in the form of a middle fold so that the outer part of the lower holding piece 1 and the upper hair pressing as shown in FIG. The outer part of the piece 2 is in a separated state. In either case, when the hair-stopping state or the hair-stopping state is released, the lower holding piece 1 merely pulls and relaxes in the vertical direction of the upper hair pressing piece 2 according to the elasticity, but does not have its own elasticity. .

The method of manufacturing the hairpin top pin of the present invention will be described below. As shown in FIG. 4, a flat straight spring steel is punched out to form a straight outer shape of the top pin.
A long hole 4 elongated in the longitudinal direction and having the same width is formed in the center of a portion corresponding to the upper hair pressing piece 2, and a circular pressing portion 8 is strongly pressed at both ends of the long hole to form a flat plate. Each of the piece and the long hole becomes a disc-shaped through hole which swells at the center thereof. In such an upper hair pressing piece 2, as shown in FIG. 7, it repels up and down with the horizontal position as a critical point.
A mountain-shaped projection 7 is formed at the center of a portion corresponding to the lower holding piece 1, and a bent portion 3 is formed by bending at a substantially central position of the straight outer shape in FIG. 4, thereby forming a top pin. . When the upper hair pressing piece 2 and the lower holding piece 1 are joined to each other, the chevron-shaped projection 7 of the lower holding piece 1 projects upward to the substantially central position of the disc-shaped through hole 4. It is bent.

[0008]

According to the method for manufacturing a hairpin top pin of the present invention, a lower holding piece and an upper hair pressing piece are provided on the left and right of the center of a flat, straight spring steel, respectively. There is a disc-shaped through hole that is punched out in the longitudinal direction of the pressing piece and swells at the center by strongly pressing the pressing part in a circular shape at both ends of the long hole, and furthermore, a chevron in the center of the lower holding piece When the upper hair pressing piece and the lower holding piece are joined to each other, the chevron-shaped projection of this lower holding piece projects upward at the approximate center of the disc-shaped through hole. Since it is a method of manufacturing a hairpin top pin that is bent at the bent portion so that a separate spring member or a top pin having strong elasticity without a complicated process such as riveting is required. Mass production at low cost. Moreover, according to the method for manufacturing the hairpin top pin of the present invention, elasticity is imparted by punching in the longitudinal direction of the upper hair pressing piece and strongly pressing the pressing portion in a circular shape at both ends of the long hole. Therefore, there is no defective product, and the resilience does not decrease even if the top pin is used for a long period of time.

[Brief description of the drawings]

FIG. 1 is a side view of a hairpin top pin in a detached state.

FIG. 2 is a side view of a hairpin in a hairpin state of a hairpin top pin.

FIG. 3 is a plan view of a top pin for a hair stop.

FIG. 4 is a plan view of a die-cut state.

FIG. 5 is a side view of a die-cut state.

FIG. 6 is a plan view showing a state where both ends of a long hole portion of the hair pressing piece are pressed.

FIG. 7 is a side view showing a state where both ends of a long hole portion of the hair pressing piece are pressed.

[Explanation of symbols]

 1. . Lower holding piece 2. . Upper hair pressing piece 3. . One side bent part . 4. Disc-shaped long hole . Frame plate 6. . Slotted holes 7. . 7. Yamagata projection . Circular pressing part

Claims (1)

(57) [Claims] 1. A lower holding piece 1 and an upper hair pressing piece 6 are provided on the left and right sides of a substantially central portion 3 of a flat plate-like spring steel, and a long hole is punched out in the longitudinal direction of the upper hair pressing piece 6. 4, the disc-shaped through-hole swells at the center by strongly pressing the pressing portion 8 in a circular shape at both end portions, and further, a mountain-shaped protruding portion 7 is formed substantially at the center of the lower holding piece 1. When the upper hair pressing piece 2 and the lower holding piece 1 are joined to each other, the chevron-shaped projection 7 of the lower holding piece 1 projects upward to substantially the center of the disc-shaped through hole. A method for manufacturing a hairpin top pin, which is formed by bending at a bending portion 3.