JPS6397190A - Tools - Google Patents

Abstract

(57) [Abstract] 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 tools such as scissors, which are formed by selecting a blade suitable for the object to be cut and fixing the blade and handle by fitting them into irregularities.

[Conventional technology]

Traditionally, tools such as scissors were made of metal such as special steel.
They were formed into shapes according to their respective purposes by means such as forging, then roughly finished to shape them, then subjected to heat treatments such as quenching and tempering, and then finished and assembled by polishing, plating, etc.

[Problem that the invention seeks to solve]

When making these tools, a mold is made, the material is die-forged, rough-finished and hardened, etc.
Since distortion occurs in the material due to hardening, we prepare a pair of materials while performing correction processing to eliminate the distortion, and then polish, plate, and sharpen them to assemble them into scissors. requires considerable skill. In addition, there are many types of scissors, etc., and the conventional manufacturing method of making molds and forging for each type has the drawback that it is not profitable when the production volume is small.

However, these days, although machining is not possible, there are ceramic blades with excellent sharpness, light and strong Ti-based alloys, A, f!
There are materials such as alloys and synthetic resins, but it has not been possible to make tools such as scissors using these materials using conventional methods.

[Means to solve the problem]

Therefore, the present invention provides a blade having a tapered convex or concave joint made of ceramic, tool steel, or Ti-based alloy, and a concave tapered blade made of Ti-based alloy, Al-based alloy, synthetic resin, or steel. Alternatively, a handle that has a convex joint and opens and closes around a fulcrum is prepared, and the concave and convex joints of both are fitted and firmly fixed together by a taper to form one body, which is suitable for the purpose of cutting. To provide tools such as scissors that allow you to choose between sharp blades, sharp blades, and ceramic blades that are harmful to humans. As a result of fitting the uneven parts, the fitting part can be made into a beautiful wavy blade pattern, and when processing materials such as Ti-based alloys that are difficult to process with normal processing methods, wire-cut electrical discharge is used. Cutting is done by.

[Effect]

According to the present invention, tools such as scissors with removable blades can be made using ceramics and Ti alloys that are difficult to process. The tools are light and strong, and the blades can be installed in combination by selecting a regular blade, sharp blade, or obtuse-angled blade depending on the purpose of use, and the mounting part has a clean blade. It was possible to present a pattern.

〔Example〕

The present invention will be explained with reference to figures illustrating the invention.

In FIG. 1, a pair of blades 1 have a convex joint portion 2. On the other hand, the pair of handles 4 that open and close around the shaft 3 have concave joints 5 at their tips, and are fitted with the convex joints 2 of the blade 1 to be integrally connected. .

2(a) is a view of a portion of FIG. 1 viewed from arrow A, and FIG. 2(b) is a sectional view taken along line BB in FIG. 1. As shown in this figure, both the convex joint part 2 and the concave joint part 5 have the same taper α, and the blade 1 and the handle 4 are integrally joined laterally by this taper α. Further, if there is no need to replace the blade 1, an adhesive may be applied to further secure the blade 1 more firmly. The cross section of the blade 1 is shown in the 3rd cross section taken along the line C-C in Figure 1.
In addition to the cross-section of a normal doll as shown in Figure (a), there is also a sharp doll that can cut extremely flexible materials such as silk, and Figure (b) shows a doll that has an obtuse angle that can be used to shear something like cardboard. It can be made as shown in the same figure (C), and even if it is wet, the blade 1 with the selected glue material can be attached to the handle 4.
When installing the dolls, it is not necessarily necessary to attach a pair of the same dolls; for example, a normal doll (a) and an obtuse-angled doll (e) may be installed in combination, depending on the purpose of use. In addition to ceramics that are difficult to process and carbon steel that is normally used, this blade 1 is made of H8S z
Wire-cut electrical discharge machining can be performed using high hardness materials such as WC coated with N, etc. Furthermore, parts that require hardness using Ti as a base material can be processed in a medium gas or with a diffused solid electrode. Ti B2 , Ti C
, TiN, etc. can be applied to a depth of 0.01 to 0.1 mm from the surface.

On the other hand, the handle 4 can be formed at once by heat-treating an inexpensive steel plate or the like and then using wire-cut electrical discharge machining or laser machining. In addition to steel plates, Ti-based materials, Ti alloy-based materials, cemented carbide materials, A1 alloy-based materials, FRP (lift-reinforced plastics), engineering plastics, etc. can be used. When performing electric discharge machining, the friction surfaces that come into contact with each other when the pair of handles 4 open and close are preferably smoothed by 20 to 40% of the depth Rmax of the remaining discharge marks to obtain a smooth surface.

Furthermore, if the convex joint part 2 of the blade 1 and the concave joint part 5 of the handle 4 are finished in a waveform as shown in FIG. 4, a beautiful blade pattern can be provided when the two are joined. can.

FIG. 5 and FIG. 6 taken along the line D-D cross section are views of another embodiment, in which the blade 1 has one convex joint 6 in the longitudinal direction, and the handle 4 is fitted with the joint 6. It has one concave joint 7, by which the blade 1 is attached to the handle 4. In the explanation, the blade has a convex joint and the handle has a concave joint, but it is also possible to have a concave joint on the blade and a convex joint on the handle. After being cut out, necessary post-processing may be performed.

〔Effect of the invention〕

According to the present invention, it is possible to effectively select the characteristics of the blade material and handle material, which utilize ceramics, Ti, etc., which cannot be conventionally processed. The problem of rust was solved by selecting a rust-free material, and there were problems with hardness, bending and hardness, etc., but the handle was dealt with according to the characteristics of the handle, and the blade was Deal with the characteristics of the blade,
Sharp blades are used for extremely flexible materials such as silk, sharp blades are used for cardboard, ceramic blades are used for wet materials, and blades of different shapes are selected depending on the purpose of use. , they can be used in combination, and the purpose can be achieved by replacing only the blades, even though the problem of lifespan is a problem.

Furthermore, since the handle etc. can be processed and cut out from a single material using wire-cut electric discharge machining, it is possible to eliminate the traditional work of making a mold and forging, etc., which is an unprecedented processing process. We were able to provide tools such as scissors and nippers for production at the plant.

[Brief explanation of the drawing]

Figure 1 is a diagram of scissors illustrating the present invention, Figure 2 (a)
2(b) is a sectional view taken along the line B-B in FIG. 1, and FIG. 3 is a sectional view taken along the line C-C in FIG. 1 and other embodiments. , FIG. 4 is another embodiment of the concave-convex joint, and FIG.
The figure is another embodiment of the concave-convex joint, and Figure 6 is D- in Figure 5.
It is a cross-sectional view taken along arrow C. 1...Blade 2...Convex joint 4...Handle 5...Concave joint Department Patent Applicant: Kiyosai Inoue, Representative of Inoue Japax Laboratory Co., Ltd. Figure 1F Figure 2] (3) (b)

Claims (9)

[Claims] (1) Consisting of a blade having a convex or concave joint, and a handle that opens and closes around a fulcrum and has a concave or convex joint, the convex or concave joint of the blade has an arbitrary shape. Tools such as scissors that are integrated by fitting into a concave or convex joint of the handle. (2) The tool according to claim 1, wherein the convex joint portion and the concave joint portion are tapered, and the blade and handle are connected by the taper. (3) The tools according to claim 1, wherein the concave joint portion and the convex joint portion form a wavy blade pattern. (4) Tools according to claim 1, wherein the blade is made of ceramics. (5) The tools according to claim 1, wherein the handle is made of a Ti-based material. (6) The tools according to claim 1, wherein the handle is made of an Al-based material. (7) Claim 1 in which the handle is made of synthetic resin material
Tools listed in section. (8) The tools according to claim 1, wherein the blade or handle is cut out by wire-cut electric discharge machining. (9) Claim 1 in which the necessary processing is performed on the necessary parts after the blade or handle is cut out by wire-cut electric discharge machining.
Tools listed in section.