JPS5915777B2 - How to make grip scissors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In gripping scissors in which an upper blade 2 and a lower blade 3 are joined to the tip of a handle 1 bent into a U-shape, a stepped portion 4 is formed on the upper surface of the neck 3a) of the lower blade 3, commonly known as a gusset. This serves as a stopper for the upper blade 2.

The conventional manufacturing method for gripping scissors is as shown in Figure 12.
A lower blade A that does not include a neck is manufactured, butt-welded to a handle C at a weld line B, and a stepped portion D is formed by applying build-up to a part of the handle C.

In other words, since the step is formed by overlaying extremely mild steel,
Due to long-term use, the stepped portion would wear out and no longer function as a stopper, posing a risk of injury.

In forming the upper blade 2 and the lower blade 3, the present invention includes neck parts 2a and 3a, respectively, which are joined to the handle 51, and in order to form the stepped part 4, the neck parts 2a and 3a are formed on the back side of the lower blade 3. By applying build-up and forging to bulge out the build-up on the blade surface side, and by forming a stepped part with the same cutter steel as the blade surface, it is possible to make durable scissors that do not easily wear out. It is.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the method for manufacturing gripping scissors of the present invention will be described with reference to the accompanying drawings.

The blade of the scissors is made of a composite material in which a thin blade steel 5 is integrally attached to one side of a very mild steel plate, as shown in Fig. 2 (15).
Material is taken with the upper and lower blades having a shape that includes the neck part facing each other.

That is, a blade body prototype 6 for one pair of scissors is made, and as shown in FIG. 3, it is divided into an upper blade 2 and a lower blade 3 along the center of the blade steel 5.

20 Then, as shown in FIG. 4, an upper blade 2 and a lower blade 3 are butt welded to both ends of the rod-shaped handle 1, respectively.

Next, as shown in FIGS. 5 and 6, the neck 3a of the lower blade 3 is
Apply overlay 8 on the back side, that is, the very mild steel surface, and then turn it back so that the overlay 8 is flush with the extremely mild steel side, that is, the back side of the blade surface, and reverse the overlay amount to the blade side. bulge out and form a step 4 here (Figs. 9 and 10).Finally, as shown in Fig. 11, the handle 1 is flattened and finished by hardening, sharpening, polishing, etc. 30 times, and then bend the handle approximately 180 degrees into a U-shape at the center to complete the gripping scissors.

In this case, a protrusion T protruding inward on the cutting edge side is formed on the neck portion 3a of the lower blade 3, at least in the composite material portion on which the cutter steel is heavily attached, and the 35 build-up 8 is After that, by hammering in the width direction during hot forging to eliminate the protrusions, the build-up is promoted and the blade steel that was distributed in the protrusions 7 is expanded. is distributed over the upper surface of the extremely mild steel (Fig. 7,
(Fig. 8), it is more effective.

According to the present invention, the stepped portion formed at the neck (gusset) of the lower blade;
The neck surface of the upper blade that comes into contact with the stepped part is made of the same blade steel as the blade surface, so the grip does not wear out the stepped part and cease to function as a stopper, unlike in conventional grips. Can make scissors.

[Brief explanation of the drawing]

The attached drawings are for explaining the method of manufacturing the gripping scissors of the present invention. FIG. 1 is a perspective view of the gripping scissors manufactured by the manufacturing method of the present invention, and FIGS. The process will be explained in order, and Figure 2 is a plan view of the original blade shape;
Fig. 3 is a plan view of the upper and lower blades separated, Fig. 4 is a plan view of the upper and lower blades welded to the handle, and Fig. 5 is a plan view showing the upper and lower blades welded to the handle. Figure 6 is a cross-sectional view taken along the - line in Figure 5, Figure 7 is a plan view with the protrusion on the neck of the lower blade crushed, and Figure 8 is the - line in Figure 7. cross section,
FIG. 9 is a plan view of the state in which the stepped portion is formed, and FIG.
FIG. 11 is a plan view of the handle in a flattened state, and FIG. 12 is a partially cutaway perspective view of gripping scissors made by a conventional manufacturing method. 1...Handle, 2...Upper blade, 3...
・Lower blade, 2a, 3a... Neck, 4...
Stepped portion, 5...Knife steel, 7...Protrusion, 8
・・・・・・A lot of meat.

Claims (1)

[Claims] 1 Neck part 2 is made of a composite material made of extremely mild steel plate with cutter steel layered on one side.
form an upper blade 2 and a lower blade 3 including a, 3a, the upper blade,
The lower blade is joined to both ends of the handle 1 that is to be bent into a U-shape, and a build-up 8 is applied to the back surface made of extremely mild steel in order to form the stepped portion 4 that will serve as a stopper on the neck 3a of the lower blade 3. A method for manufacturing gripping scissors, characterized in that the 8-minute build-up is forged to form a bulge on the blade surface side, which is the blade steel on the opposite side, to form a stepped portion 4.