JPH0623312Y2 - Aspect in Kendo Martial Arts - Google Patents

Description

[Detailed Description of the Invention] 3-1 Purpose of the Invention 3-1-1 Field of Industrial Application The present invention relates to a surface in martial arts such as kendo, and more particularly to improvement of a surface metal fitting constituting the surface.

3-1-2 Conventional technology The surface of kendo receives a strong impact from a bamboo sword, so it must have a strong structure and material that can sufficiently resist it, and at the same time it must be lightweight. It was From such a requirement, the conventional method, for example, Japanese Utility Model Publication No. 57-4
A surface such as that seen in 2462 was devised.
However, even with the structure according to such a device, it is not possible to prevent damage caused by smashing of a bamboo sword and an accident resulting from the pitting corrosion phenomenon due to salt that occurs at the connection portion between the pedestal and the chin.

In addition, although a synthetic resin bamboo sword mixed with carbon black has recently appeared and started to spread, the impact force by hitting the surface of this bamboo sword and other armor is not equal to that of a normal bamboo sword, and it causes severe pain to the whole body. In addition to running, the surface and other armor were often damaged and accidents occurred, making the service life extremely short.

When investigating the causes of damage and accidents that occur on such a kendo surface, it was found that there is a problem in the difference in strength between the pedestal and the chin when the chin is connected to the pedestal.

Even if a tough material is used for a chin and a mine (vertical chin), if the strength of the pedestal is weaker than that, it may cause damage to the pedestal. Therefore, the strength of light-weight materials cannot be the same as that of tough materials unless the light-weight material has a cross-sectional area that is several times the current cross-sectional area. Therefore, iron, stainless steel, titanium steel and other tough materials must be used for the pedestal. . Lightweight material such as aluminum alloy is usually used for the chin and ridge, and this is connected to the pedestal made of tough material by caulking or welding, but when the aluminum alloy material is in contact with the foreign metal material, Since many foreign metal materials have a higher potential than the pitting potential of aluminum alloy materials, the electric current always flows from the lower ridge to the higher pedestal. Even if the chin is made of a tough material and the pedestal is made of an aluminum alloy material or the like, an electric current will flow from the pedestal to the chin.

Normally, almost no current flow between dissimilar metals is observed in a dry state in the atmosphere, but since a large amount of sweat adheres to martial arts surfaces such as kendo, the action of salt in the sweat causes The current flow became active, and the pitting phenomenon was promoted at the contact portion with the dissimilar metal material made of the aluminum alloy material.

3-1-3 Problem to be Solved by the Invention Therefore, the present invention aims to provide a surface which prevents the pitting corrosion phenomenon which occurs at the joint connection point of the pedestal and the joint of the surface made of different metals. Therefore, even if the surface of a bamboo sword of any material is struck, damage to the surface and accidents due to the damage are surely prevented.

3-2 Configuration of the Invention 3-2-1 Means for Solving the Problem The present invention is configured such that a pedestal made of a tough metal material such as stainless steel or iron is connected to a chin made of a lightweight metal material of aluminum alloy. It is a surface formed by forming a surface-treated film by rubber coating or vinyl coating at each connection point with the base of the chin.

3-2-2 Action When a large amount of sweat containing salt that has just flowed out of the face or head hits the pedestal part of the surface, it tries to adhere to the connecting part of many straws, but that part is the surface treatment film. Since it is entirely covered and guarded by the surface treatment film, it does not penetrate into the metal portion of the base of the chin and is blocked.

3-2-3 Example (1) is a pedestal, which is made of a tough material such as stainless steel or iron. (2) is a string made of a lightweight material such as aluminum alloy. (2) is a joint connection point between the pedestal (1) and the chin (2), and a surface treatment film (4) formed by a rubber coating (rust preventive paint for ships) or a vinyl coating is formed on the connection point at the joint point. The surface treatment film may be formed over the entire surface of the pedestal and the chin. (5) is Minekin.

In addition to the above embodiments, the pedestal (1) may be made of an aluminum alloy material. Even if the pedestal (1) and the chin (2) are made of the same kind of metal material as described above, if the composition of the aluminum alloy material is different depending on the content of magnesium etc., the same salt content of sweat as that occurring between different metals Since a pitting corrosion phenomenon is caused by, a similar surface treatment film (4) is formed on the peripheral surface of the connecting portion of both members.

Therefore, the integral formation of the surface treatment film at the connecting portion of the pedestal and the hook portion, which is the object of the present invention, is not limited to the case where both members are made of pure dissimilar metal materials, but the both members are made of the same metal material. It also includes the case of configuring.

In the formation of the surface-treated film by various coatings in the present invention, the film is coated without leaving any gap portion formed at the connection part between the pedestal and the chin, and the connection part between the pedestal and the chin is continuously integrated as seen from the surface. Since it is configured so as to be effective, moisture such as sweat flowing on the surface is completely blocked, and even if an attempt is made to enter the inside of the connecting portion through the gap, it cannot be performed. The formation of the surface treatment film by such coating is completely different from the surface treatment by the plating which leaves a gap portion at the connection point, and in the case of the treatment by the plating, the surface treatment film is formed continuously and integrally at the connection point. It is impossible to form a film.

3-3 Effects of the Invention Since the present invention is configured as described above, it has the following practical effects.

Even if sweat or other moisture is hard to dry immediately when it adheres to the base of the lanyard that connects to the pedestal, even if sweat remains attached, the surface of the fox that connects to the pedestal does not show the connection gap with the pedestal surface. Since the surfaces of both members are continuously and integrally covered by the treatment film and the external contact of the metal surface is completely blocked, no salt or moisture is allowed to pass inside, which causes the pitting corrosion phenomenon of the metal part. It won't happen.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a perspective view of the entire surface, Fig. 2 is a plan sectional view of the main part, Fig. 3 is a plan sectional view of the main part of the present invention subjected to a corrosion test, and Fig. 4 [Fig. 4] is a plan sectional view of a main part of a conventional product subjected to a corrosion test.

Claims (3)

[Scope of utility model registration request] 1. A pedestal made of a tough metal material such as stainless steel or iron is connected to a chin made of a lightweight metal material of an aluminum alloy, and a surface treatment film is formed at each connection point with the pedestal at the base of the chin. An aspect of Kendo martial arts characterized by 2. A pedestal made of a tough metal material such as stainless steel or iron is connected to a chin made of a lightweight metal material of aluminum alloy, and a surface treatment film is formed by rubber coating at each connection point with the pedestal at the base of the chin. The aspect in martial arts such as Kendo described in paragraph (1) of the utility model registration claim. 3. A pedestal made of a tough metal material such as stainless steel or iron is connected to a chin made of a lightweight metal material of aluminum alloy, and a surface treatment film is formed by vinyl coating at each connection point with the pedestal at the base of the chin. The aspect in martial arts such as Kendo described in paragraph (1) of the utility model registration claim.