JPH07289120A - Fishing hook - Google Patents

Abstract

PURPOSE:To improve strength and wear resistance of a fishing hook useful for fishing. CONSTITUTION:This fishing hook comprises a multilayer structure having a wire section in a concentric circle state. A material constituting the multilayer structure is not limited to a uniform material and a combination of various materials such as high carbon steel and tungsten carbide and high carbon steel and high-speed steel may be considered. Performances such as traverse rupture strength and wear resistance at the tip part of hook are improved. A material which has conventionally been difficult to process can be processed and this fishing hook has great effect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishing hook used for fishing.

[0002]

2. Description of the Related Art Conventionally, wire rods for fishhooks have been 0.8% to 1.%.
High-carbon steel wire rods and high-carbon stainless steel wire rods having a uniform single-section structure containing about 3% carbon are used. However, the fishing hooks made using these conventional wire rods have a bent tip or become chipped due to chipping when used for a long time, and even if a bite fish bites away, it will escape. There is often As a fisherman, I want a needle that has a strong and sharp tip and is pierceable as much as possible. The most important point in the fishing hook is that the tip is sharper and does not break,
Since it does not bend and does not easily wear, the conventional single-needle needles currently used have the following drawbacks. If the heat treatment is performed to increase the hardness in order to make the tip of the needle less likely to wear, the needle becomes brittle and the tip of the needle tends to be chipped. If a heat treatment is performed to reduce the hardness to make it hard to break, the needle tip is easily bent or worn. In order to improve the characteristics, a fishing hook made of wear-resistant steel or the like is expensive, has poor workability, and has a low degree of freedom in shape.

[0003]

The fishing hook has no restrictions on bending, burring, etc. and has a high degree of freedom with respect to the shape of the fishing hook. When used as a fishing hook, the tip of the needle has abrasion resistance,
High strength such as not easily breaking or bending. It is desirable that it satisfies the above. The present invention is
It is intended to satisfy the above-mentioned problems at the same time and to significantly improve the conventional technique.

[0004]

A fishing hook according to the present invention is characterized in that a wire rod has a concentric circular cross section and has a multi-layer structure. As is well known for Japanese swords, it is possible to make a sharp blade that is hard to break, hard, and strong, by forging multiple layers of steel. The present invention also enables a fishing hook with higher toughness and hardness by drawing finely a wire rod that is formed by stacking multiple layers concentrically. Further, in order to further improve the performance of the needle tip, it is also effective to use a material having a high hardness such as tungsten or high-speed steel as the material of the central portion of the multilayer structure.

[0005]

In the present invention, the tip of the fishing hook can be made into a good fishing needle having abrasion resistance and being hard to break and bend, and the degree of freedom with respect to the needle shape is the same as that of the conventional material. In addition, even if it is a material that can not normally be processed as a fishhook, if it is useful for performance improvement, it will come to the center of this multi-layered structure Can be processed.

[0006]

Example 1 As shown in FIG. 2, a high carbon steel containing 0.8% of carbon component was made to have a four-layer structure and a wire diameter of 0.4 m.
A wire rod of m was prepared and used as a fishing hook. The structure is such that the thickness of the central layer is 0.05 ¢ mm and the thickness of the second layer is 0.025 m.
m diameter 0.1 ¢ mm, third layer has thickness 0.025 mm, diameter 0.15 ¢ mm, outermost layer 4 has outer diameter 0.4 ¢ mm
And As a result, the bending resistance at the tip of the needle was improved by 20 to 30% and the abrasion resistance was improved by 10 to 20%, as compared with a fishing hook made of a uniform material of the same material.

[0007]

Example 2 As shown in FIG. 3, four layers of high carbon steel containing 1.0% of carbon component were provided, and a niobium layer of 2 μm was provided between the high carbon steel and the high carbon steel. As a result, the bending strength of the tip of the needle is 30 ~ compared to a fishing hook made of the same material, uniform material.
40% and abrasion resistance improved by 10 to 20%.

[0008]

Example 3 As shown in FIG. 4, a tungsten layer was provided in the center layer and a carbon component of 1.0 was formed through a 2 μm niobium layer.
Three high carbon steel layers containing 3% were provided. As a result, the bending resistance of the tip of the needle was improved by 40 to 50% and the wear resistance was improved by 40 to 50%, as compared with a fishing hook made of a uniform material of the same material.

[0009]

[Embodiment 4] As shown in FIG. 5, a high carbon steel containing 1.0% of carbon component has a thickness of the central layer of 0.05 ¢ mm and the second and subsequent layers have a thickness of 0.025 mm and are continuously formed. A multi-layered structure,
The final wire outer diameter was 0.4 mm. As a result, even when a continuous multi-layer structure made of the same material is used, compared to a fishing hook made of a uniform material made of the same material, the same effect as that of other multi-layer structured needles is recognized, and the transverse rupture strength is 30 to 40. %, Wear resistance is 1
Improved by 0 to 20%.

[0010]

As described in the examples of the preceding paragraph, even the same material that has been conventionally used is improved in hardness and wear resistance as compared with a uniform material by forming a multilayer structure. be able to. Furthermore, the effect was further improved by providing a niobium layer between each layer. Even when a different material such as tungsten was brought into the central layer, it could be processed as a fishing hook and the physical properties of tungsten could be well drawn out. Thus, in terms of performance improvement, a very good effect was recognized.

[Brief description of drawings]

FIG. 1 is a perspective view of a fishing hook having a multilayer structure.

FIG. 2 is a cross-sectional view of a fishing hook wire rod having a four-layer structure made of high carbon steel containing 0.8% of carbon component.

FIG. 3 provides four layers of high-carbon steel containing 1.0% of carbon component,
Sectional drawing of the wire material for fishing hooks which provided the niobium layer between each layer.

FIG. 4 is a view showing that a tungsten layer is provided in the center layer and three layers of high carbon steel containing 1.0% of carbon component are provided via niobium layers.
Sectional drawing of the wire rod for fishing hooks.

FIG. 5 is a cross-sectional view of a fishing hook wire rod having a continuous multi-layer structure of high carbon steel containing 1.0% of carbon component from the center layer.

[Explanation of code] ……………… High carbon steel ……………… Niobium ……………… Tungsten

Claims (2)

[Claims] 1. A fishing hook having a multi-layered structure in which a wire rod has a concentric cross section. 2. The material of the central portion of the multi-layer structure is a highly hard and wear resistant material such as tungsten or high speed steel.