JP3530296B2 - Fishing float and its manufacturing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a float used for fishing in the sea, a river, a lake or a pond and a method for manufacturing the float.

[0002]

2. Description of the Related Art Hitherto, as a fishing float of this kind, a wood product made by cutting a natural wood such as paulownia wood and applying a water resistant coating on its surface has been popular. In recent years, resin floats have also been used, but these wooden and resin floats have a problem that they are easily damaged or damaged by hitting rocks or the like in a fishing ground.

Recently, metal floats have also been developed. The metal float has excellent impact resistance when hitting a rock or the like, and can effectively cope with a damage accident or the like which is a problem with the above-mentioned wooden float. As a material for forming such a metal float, a metal material such as stainless steel or aluminum is used.

[0004]

Among the metal floats conventionally developed, for example, in the case of stainless metal floats,
Since stainless steel has a large specific gravity, it was difficult to design a low center of gravity. In other words, since the center of gravity of the float had to be relatively high, the stability of the float in water was lacking, and in some cases a good fishing effect could not be expected. Further, in the metal float using aluminum, since the specific gravity is small, the above-mentioned problem of the center of gravity can be solved, but there is a problem in corrosion resistance such as rusting.

In view of the above situation, it is an object of the present invention to provide a fishing float having excellent performance having high impact resistance, stability and corrosion resistance, and a method for manufacturing the fishing float.

[0006]

The fishing float according to the present invention comprises:
It is characterized in that at least a lower portion of the shell body forming the floating body is made of a composite material composed of carbon fibers and a thermosetting resin matrix. Further, in the fishing float of the present invention, at least the lower portion of the shell body on which the floating body is to be formed,
It is characterized by being composed of a composite material composed of a carbon fiber woven cloth and a thermosetting resin matrix.

Further, in the fishing float of the present invention, the upper shell of the floating main body is formed of a water-resistant thermoplastic resin, and the lower shell is formed of the composite material.

In the method for manufacturing a fishing float according to the present invention, carbon fibers are impregnated with a thermosetting resin to form a carbon fiber reinforced composite material, and the carbon fiber reinforced composite material is used to form a floating body. It shapes at least the lower part of the body.

In the method for manufacturing a fishing float according to the present invention, a carbon fiber woven cloth is impregnated with a thermosetting resin to form a carbon fiber reinforced composite material, and the carbon fiber reinforced composite material is used to form a floating body. In addition to molding the lower shell, the upper shell of the floating body is molded using the water resistant thermoplastic resin or the carbon fiber reinforced composite material, and the upper floating shell and the lower shell are integrally joined to form a hollow floating main body. Form.

[0010]

According to the present invention, at least the lower shell of the floating body is made of a carbon fiber and thermosetting resin matrix composite material, that is, a carbon fiber reinforced composite material. The float composed of the carbon fiber reinforced composite material is lightweight, has excellent impact resistance and corrosion resistance, and has good moldability, and therefore has excellent mass productivity. Since carbon fiber reinforced composite material has a low specific gravity, the center of gravity can be easily set low by attaching a weight to the lower part of the float formed of such composite material, which ensures high stability and stable flight attitude. be able to. Furthermore, since it is excellent in impact resistance and water resistance, it realizes excellent floating without damage or water infiltration, and can take advantage of the characteristics of the material to obtain a beautiful appearance.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a fishing float according to the present invention will be described below with reference to FIGS.

FIG. 1 shows a structural example of a fishing float 10 in this embodiment. In this embodiment, the present invention is applied to a so-called hollow float, and the fishing line 1 is inserted through the center of the float 10 as shown in the figure.

In the figure, the floating body of the float 10 is formed by joining an upper cup (upper shell) 11 made of synthetic resin and a lower cup (lower shell) 12 made of reinforced plastic. The floating main body, which is hollow and has a roughly oval shape, has a vertically divided two-part configuration. At the center of the upper cup 11, a middle pipe 13 for inserting the fishing line 1 is hung from the top to the lower end of the lower cup 12.
Has been extended. The center pipe 13 is integrally formed with the upper cup 11 as in this example, and has a center hole 13a through which the fishing line 1 is inserted.

In the present embodiment, the upper cup 11 is formed of a water-resistant thermoplastic resin, preferably a resin material such as polypropylene (polycarbonate) or ABS having a colored (red, yellow or orange) light-transmitting or light-shielding property. To be done.

The lower shell, which constitutes the floating body of the float 10, that is, the lower cup 12, is made of a carbon fiber reinforced composite material. As a typical example of the carbon fiber reinforced composite material in the present invention, a thermosetting resin such as an epoxy resin, a vinyl ester resin, an unsaturated polyester resin, or a phenol resin is used as a matrix (base material), and a PAN-based carbon fiber (polyacryl) is used. A carbon fiber composite material obtained by bonding nitrile fibers (carbon fibers obtained by firing) or pitch-based carbon fibers (carbon fibers formed by using coal tar generated when distilling petroleum) as a reinforcing material is provided. This is preferable because the carbon fiber length can be increased. The carbon fiber has a tensile elastic modulus of 2 × 10 ⁴ kg / mm ² or more,
A tensile strength of 3 × 10 ² kg / mm ² or more is preferable. The lower cup 12 can be formed by a compression molding method such as pressing using the composite material.
At this time, it is preferable to use a carbon fiber woven fabric as the reinforcing material because the crushing rigidity is improved.

The upper cup 11 and the lower cup 12 are tightly joined by fitting the respective fitting portions (outer circumference) 11a and fitting portion (inner circumference) 12a to each other. As will be described later, when the upper cup 11 and the lower cup 12 are joined, an appropriate adhesive is applied to the fitting portions 11a and 12a to fit and bond them. Further, the engaging projections 14 are attached so as to project from appropriate positions (for example, two positions in the diametrical direction) on the inner peripheral edge of the upper cup 11, and the engaging recesses are formed along the inner peripheral edge of the lower cup 12. The groove 15 is formed. The projecting piece 14 has a constant width as shown by the alternate long and short dash line in FIG. 1, and its tip end is supported so as to elastically engage with the engaging groove 15.

At the lower end of the lower cup 12, there is a through tube 13.
A weight 16 inserted around is adhered and fixed. The weight 16 can be constituted by, for example, a plurality of washer made of metal such as lead attached to the through tube 13 in a laminated manner, and a heavy (thick) one can be sequentially stacked from the lower layer. Further, a step portion is provided at the lower end portion of the middle through pipe 13, and the step portion is fitted and adhered to the hole 12b of the lower cup 12. A ring 17 made of, for example, ceramic is fixed to the top of the upper cup 11.

In the fishing float 10 of the present invention, when it is first manufactured, the upper cup 11 is molded into a predetermined shape by injection molding or the like. On the other hand, the lower cup 12 is formed into a predetermined shape by pressing or the like. Next, the separately formed upper cup 11 and the lower cup 12 are joined and integrated to obtain a floating body of the hollow structure. In this case, the upper cup provided with an adhesive (x mark) as shown in FIG. 11 and lower cup 12
The fitting portion 11a and the fitting portion 12a are fitted together.

At the same time, the engaging projection 14 of the upper cup 11 engages with the engaging groove 15 of the lower cup 12. The upper cup 1 is formed by the engagement of the projecting piece 14 and the concave groove 15 itself.
The 1 and the lower cup 12 can be bonded and held with high bonding strength. In other words, when the upper cup 11 and the lower cup 12 are finally joined by the adhesive, they are previously joined by the engagement of the projecting piece 14 and the recessed groove 15, whereby the proper and complete adhesive action of the adhesive is achieved. Can be guaranteed.

By the way, in the conventional metal float of this type, when the upper and lower cups are bonded, a predetermined jig is used.
It was necessary to hold the upper and lower cups from the holding outside until the adhesive solidified. Further, it takes at least 24 hours for the adhesive to solidify, and thus it takes a lot of time and effort. According to the present invention, as described above, in the float 10 itself, the upper cup 11 is in the form of temporary fixing.
By joining the lower cup 12 and the lower cup 12, it is possible to surely join them without any trouble. Further, in the present invention, a silicon-based adhesive is preferably used as the adhesive, and after the adhesive is solidified, for example, when distortion or the like occurs between the upper cup 11 and the lower cup 12 due to a thermal effect or the like, Also, such strain and the like can be absorbed by the silicone adhesive.

As described above, the float 10 of the present invention constructed by using the carbon fiber reinforced composite material is a float 10 because the forming material itself is lightweight and has a hollow structure.
The whole can be lightened, and necessary and sufficient buoyancy can be obtained as a float. In this case, a desired buoyancy balance can be set by setting the weight of the weight 16. Further, according to the carbon fiber reinforced composite material, high strength is ensured and the impact resistance is excellent, and high corrosion resistance is guaranteed. In addition, since the lower cup 12 made of the carbon fiber reinforced composite material has good moldability, it is also excellent in mass productivity.

In the float 10 of the present invention, the carbon fiber reinforced composite material forming the lower cup 12, in particular, has a smaller specific gravity than a metal material or the like. For example, when the float 10 is made to have substantially the same size and shape as the float made of metal, the lower cup 1
By setting a relatively heavier weight 16 in the lower part of 2, it is possible to easily realize the floating of the low center of gravity.

Here, as shown in FIG. 3, the float 10 of the present invention is compared with a metal float 10 'having the same size and shape. The total weight (or mass) M and M'of these two floats 10 and 10 'are the same. Overall weight M of float 10; M = m1 + m2 + m3 where m1, m2 and m3 are the weights of the upper cup 11, the lower cup 12 and the weight 16 in the float 10, respectively. Overall weight of float 10 'M'; M '= m1' + m2 '+ m
3'Here, m1 ', m2', and m3 'are the weights of the upper cup 11', the lower cup 12 ', and the weight 16' in the float 10 '.

Weight m of the lower cup 12 of the float 10 of the present invention
2 is lighter than the weight m2 'of the lower cup 12' of the metal float 10 ', that is, m2'> m2. In this case, since the total weights M and M'of the two floats 10 and 10 'are the same, the weight m3 of the weight 16 of the float 10 of the present invention is greater than the weight m3' of the weight 16 'of the metal float 10'. It can be set heavily, i.e. m3> m3 '. Therefore,
In the float 10 according to the present invention, the center of gravity G of the entire body is set closer to the lower end portion, that is, the center of gravity G can be a low center of gravity. As a result, high stability of the float 10 can be ensured.

The lower cup 1 of the carbon fiber reinforced composite material
According to 2, the surface treatment and coloring (black or the like) as a product is performed as it is after the molding, and it is not necessary to perform any special coating treatment or the like. Therefore, it is possible to reduce man-hours for painting and the like and equipment therefor, and to realize floating at a substantially low cost.

When the float 10 is actually used, the lower part (lower cup 12) of the float 10 which becomes a collision part when hitting a rock or the like during fishing is made of a carbon fiber reinforced composite material, and the float main body is protected from a shock due to a collision or the like. Because I tried to protect it,
It is possible to prevent fatal damage when the float 10 collides with a rock or the like. Therefore, it is not necessary to replace the float and remake the tackle, which are required when the float collides with a rock or the like during fishing and the float is damaged.

Here, in another embodiment of the present invention,
The entire floating body is made of carbon fiber reinforced composite material. That is, the upper cup 11 of the float 10 in the above-described embodiment is also made of the carbon fiber reinforced composite material. By forming both the upper cup 11 and the lower cup 12 from the carbon fiber reinforced composite material, impact resistance and corrosion resistance can be further improved.

Further, in still another embodiment of the present invention, the entire floating body is integrally formed of the carbon fiber reinforced composite material. In this case, it can be formed into a desired shape by a compression molding method such as press molding or autoclave molding, but in order to obtain an integrally molded hollow structure, for example,
It requires certain measures as described later.

FIG. 4 shows an example of the structure of the float 20 when the entire float body is integrally molded. As a basic configuration of the float 20, a centering pipe 21 having a centering hole 21a through which the fishing line 1 is inserted is provided. The floating body in this case may have a hollow, substantially oval shape, but the floating body can be formed by, for example, an integral hollow molding method (melt core method) as shown in FIG.

That is, using a low melting point alloy, the core mold 100 corresponding to the floating body of the floating 20 as shown in FIG.
To form. As shown in FIG. 5B, carbon fiber SMC (sheet molding compound) 101 is attached to the peripheral surface of the core mold 100 to a predetermined thickness. In this case, a small hole 101a is provided at the lower end of the carbon fiber SMC 101 so that the molten material of the core mold 100 can be taken out. Next, the core mold 100 to which the carbon fiber SMC101 is attached is set in a predetermined mold and press molding is performed. After molding, the core mold 100 is melted by heating for a long time, and the melted material of the core mold 100 is taken out through the small holes 101a. According to the float 20, it is possible to realize lightweight and excellent impact resistance and corrosion resistance due to a simple hollow structure formed by integral molding.

In the above embodiment, the upper cup 1
In the above description, the engaging projection 14 is provided on the first cup 1 and the engaging groove 15 is provided on the lower cup 12, but the projecting piece 14 and the concave groove 15 may be provided between the upper cup 11 and the lower cup 12 in reverse. May be. Further, the example in which the two protrusions 14 are provided has been described, but more protrusions may be provided.

[0032]

EXAMPLE A specific example of the fishing float 10 of the present invention will be described.
It will be described next. The float 10 of this embodiment is divided into two parts by an upper cup 11 and a lower cup 12. Upper cup Molded into a predetermined shape by injection molding using a colored ABS resin as a raw material. Lower cup material: SMC made of carbon fiber woven cloth impregnated with vinyl ester resin is used. The resin content in this SMC is 40% by weight. The carbon fiber used for the carbon fiber woven fabric is made by Mitsubishi Rayon and has a tensile modulus of elasticity of 2.4 × 10 ⁴ k.
g / mm ² or more, tensile strength; 4 × 10 ² kg / mm ² of high-strength PAN-based carbon fiber with 10 filaments
The number is 00. Twill weave with 28 warp yarns / inch and 28 weft yarns / inch is used as the woven fabric, and the weight of the woven fabric is 149 g /
m ² Shape, etc .: A funnel type with a diameter of 20 mm, a depth of 25 mm, and a thickness of 1 mm. Molding conditions: Mold into a predetermined shape by a press molding method. a) Mold surface temperature ... 140 ° C b) Curing time ... 70 sec c) Pressure ... 50 kg / cm ² (using a 50 ton press) d) Charge amount ... 2 g

[0033]

As described above, according to the present invention, by using a carbon fiber reinforced composite material to form a float, it is possible to realize a float that is lightweight and has excellent impact resistance and corrosion resistance. In addition, the center of gravity of the float can be easily set low, and high stability can be guaranteed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration example of an embodiment of a fishing float according to the present invention.

FIG. 2 is an exploded perspective view showing a configuration example of an embodiment of a fishing float according to the present invention.

FIG. 3 is a diagram illustrating an example of setting the center of gravity in the embodiment of the fishing float according to the present invention, together with a comparative example.

FIG. 4 is a cross-sectional view showing a configuration example of another embodiment of the fishing float according to the present invention.

5A and 5B are diagrams illustrating manufacturing steps for the fishing float of FIG.

[Explanation of symbols] 1 fishing line 10 floating 11 upper cup 12 lower cup 13 through pipe 13a through hole 14 Engaging protrusion 15 Engagement groove 16 weights 17 ring

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-87723 (JP, A) Fukukaihei 2-39678 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) A01K 93/00

Claims (5)

(57) [Claims] 1. A fishing float according to claim 1, wherein at least a lower portion of the shell body forming the floating body is made of a composite material composed of carbon fibers and a thermosetting resin matrix. 2. The fishing float according to claim 1, wherein at least a lower portion of the shell body forming the floating body is made of a composite material including a carbon fiber woven cloth and a thermosetting resin matrix. 3. The fishing boat according to claim 1, wherein the upper shell of the floating body is made of a water-resistant thermoplastic resin and the lower shell is made of the composite material. float. 4. Forming a carbon fiber reinforced composite material by impregnating carbon fiber with a thermosetting resin, and molding at least a lower portion of a shell body for forming a floating body using the carbon fiber reinforced composite material. A method of manufacturing a float for fishing which features. 5. A carbon fiber woven fabric is impregnated with a thermosetting resin to form a carbon fiber reinforced composite material, and the carbon fiber reinforced composite material is used to form a lower shell of a floating body.
A hollow floating body is formed by molding an upper shell body of a floating body using a water resistant thermoplastic resin or the carbon fiber reinforced composite material, and integrally joining the upper shell body and the lower shell body. And a method for manufacturing a fishing float.