JPH04207139A - Fishing rod - Google Patents

Abstract

PURPOSE:To provide a fishing rod comprising a hollow laminate composed of a fiber-reinforced resin layer and a specific vibration-damping material layer, the outermost layer being constituted of the resin layer having a high function of absorbing impact vibrations and highly sensitively transmitting a fish strike. CONSTITUTION:A fishing rod comprises a hollow laminate composed of a fiber- reinforced resin layer containing an epoxy-based resin or an unsaturated polyester-based resin and a vibration-damping material layer composed of an elastomeric substance selected from polyester resins, polyamide resins and urethane resins each having a vibration coefficient of >=0.01 (preferably >=0.02), the outermost layer being constituted of the above resin layer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a highly functional fishing rod that can absorb shock vibrations and transmit small fish signals with high sensitivity.

[Prior Art] Conventionally, various types of fishing rods have been manufactured, such as bamboo tubes and fiber-reinforced plastic tubes, but these have been studied with a focus on improving strength characteristics and weight reduction. That's all.

In addition, with regard to the recent spread of carbon rods, some claim to convey fish confidence to fishing rods due to the material's high vibration damping rate, but carbon fiber, carbon fiber and aramid fiber, carbon fiber and boron fiber, etc. The vibration damping rate of the rod made of an inorganic fiber-reinforced resin layer is insufficient;
The shock vibrations that occur when repeatedly fishing for bluefin fish have only caused problems such as elbow pain.

[Problem to be solved by the invention] Recently, many anglers are complaining of such elbow pain.

In addition, it is desirable that the only signal that should be transmitted to the fishing rod is the fish signal, but in reality, the environment of the fishing location is not constant, and due to the influence of vibrations transmitted from wind, rain, waves, etc., it is difficult to accurately transmit only the fish signal. It has been considered impossible to make a fishing rod that conveys this message.

The purpose of the present invention is to solve the above-mentioned drawbacks of the conventional fishing rod, reduce the burden on elbows due to vibrations that occur when repeatedly fishing for fish, alleviate abnormal vibrations, and make it possible to properly detect fish signals by hand. We aim to provide the best fishing rods possible.

[Means for Solving the Problems] The present invention employs the following means to achieve the above object.

That is, the fishing rod of the present invention is a hollow laminate comprising a fiber-reinforced resin layer and at least one vibration suppressing material layer having a vibration coefficient of 0.01 or more at room temperature, and the outermost layer of the laminate is It is characterized by being composed of a fiber-reinforced resin layer.

[Function] The present invention has revealed the fact that when a composite hollow material made of a vibration suppressing material and a fiber-reinforced resin is used as the aggregate of a fishing rod, it is possible to unexpectedly detect the presence of fish by hand. It was completed by doing so.

As the resin used for the fiber-reinforced resin layer of the present invention, materials having sufficiently high strength and rigidity as aggregates for fishing rods, such as thermoplastic resins and thermosetting resins, can be used, but thermosetting resins are preferably used. The resin should have high rigidity.

Examples of such thermoplastic resins include polyamide resins, polyester resins, polycarbonate resins, ABS resins, polyvinyl chloride resins, bonoacetal resins, polyacrylate resins, polystyrene resins, and polyethylene resins. , polyvinyl acetate resin, polyimide resin, and mixed resins thereof can be used.

In addition, thermosetting resins include epoxy resins, unsaturated polyester resins, phenol resins, urea resins, melamine resins, diallyl phthalate resins, urethane resins, polyimide resins, and mixed resins thereof. can be used.

These resins are reinforced with reinforcing fibers such as inorganic fibers such as metal fibers, carbon fibers, glass fibers, and alumina fibers, aramid fibers, and other high-strength synthetic fibers to form a fiber-reinforced resin layer. These reinforcing fibers may be used alone or in a mixture thereof, and may be used in the form of long fibers, short fibers, or a mixture thereof.

It is important that the vibration suppressing material in the present invention is made of a substance having a vibration loss coefficient of 0.01 or more at room temperature, which will be described later.

Materials constituting such substances include metals with high specific gravity such as lead and copper, elastic rubber, synthetic resins, these resins, metals, ceramics, graphite, ferrite, etc.
A material mixed with an inorganic filler such as mica can be used.

As such a metal, for example, metal particles or metal fibers made of lead, iron, copper, etc. can be used.

As such a vibration suppressing material, those listed below can be used, but are not limited to these.

・Inorganic elastomers include rubber-like sulfur, silicon fluoride polymers, phosphorus-based, silicon-based (siloxane-based polymers), phosphazene-based elastomers (phosphorous and nitrogen skeletons), etc. ・Polymer gel-based products include polyvinyl alcohol hydrogel, Sodium acrylate/acrylamide copolymer gel, etc. Organic elastomers include polyvinyl chloride, polyurethane, polyamide, polystyrene, ethylene vinyl acetate copolymer, ethylene ethyl acrylate, polyolefin, polyester, Poxy-based, block polyether amide,
Or copolymers or mixtures thereof - Rubber elastomers: natural rubber, styrene-butadiene rubber, nitrile rubber, isoprene rubber, hydrin rubber, chloroprene rubber, etc. - Foamed plastics: polyurethane-based, polystyrene-based, polyethylene-based, fluorine-based, EVA Among these vibration suppressing materials such as polyurethane, phenolic, PVC, and polyurea resins, materials made of elastic rubber and synthetic resins can be processed into various shapes such as protrusions, plates, and films. It is preferable because it can be easily laminated or composited.

As the vibration suppressing material in the present invention, a more preferable material has a vibration loss coefficient of 0.01 or more in the frequency range of 50 Hz to 5 KHX at room temperature of 20°C, particularly preferably 0.
．． 02 or more.

Among these, polyester-based, polyamide-based, and polyurethane-based elastomers are particularly preferred. These elastomers themselves are characterized by high strength and good adhesion to fiber-reinforced resins. In particular, polyester-based, polyamide-based elastomers or polyurethane elastomers copolymerized with polyether segments are preferably used from the viewpoint of performance. Furthermore, the Shore hardness (D) is 2
0~50, flexural modulus is 200kg/afl'~100
An elastomer in the range of 0 kg/d is most preferably used in the present invention because it has good molding adhesion to the carbon fiber prepreg and has an excellent balance between vibration damping properties and molded product strength.

The above-mentioned vibration loss coefficient is measured as follows. That is, under room temperature (20°C) conditions, MIL-P-22
The vibration damping waveform according to 581B is measured, and the vibration loss coefficient (η) is determined by the following formula.

a, Attenuation rate (DECAY RATD Do (dB/5ec) = (F /N) 20 log (A+ / A2
) b, EFFECTIVE DECAY
RATE) De (+lB/5ee) =po −
I) [IC1 critical attenuation rate (PERCENT CRITI)
CAL DAMPING)C/Cc(%) -(18
３ Damping factor d of the original steel plate, vibration loss coefficient (η) η=(C/Cc) 150 Next, the fishing rod of the present invention will be explained with reference to the drawings.

Although typical structural diagrams are shown in FIGS. 1 to 4, the fishing rod of the present invention is not limited to these structures.

The fishing rod 1 shown in FIG. 1 is an example in which a vibration suppressing material layer 3 is arranged around the entire circumference of the middle layer of aggregate composed of a fiber-reinforced resin layer 2.

The fishing rod 1 shown in FIG. 2 is an example of a modification of the structure shown in FIG. 1 in which a vibration suppressing material layer 3 is arranged around 1/3 of the circumference.

The fishing rod 1 shown in FIG. 3 is an example of a structure in which the vibration suppressing material layer 3 is arranged in multiple layers, and the layer is partially provided with intermittent portions.

The fishing rod 1 shown in FIG. 4 is an example in which a vibration suppressing material layer is provided as the innermost layer of the fiber reinforced resin layer.

Further, the fishing rod of the present invention may have a structure in which various combinations of the structural examples shown in FIGS. 1 to 4 described above are combined, or may have a structure in which the vibration suppressing material layer is arranged on a portion of the aggregate in the axial direction.

Further, when inserting two or more layers of vibration suppressing material, they may be made of the same material or different materials.

Such a fishing rod preferably has an apparent vibration loss coefficient of 0.0.
2 or more, more preferably 0.03 or more, especially 0.04
This is a high value. The higher the value of the loss coefficient, the better the above-mentioned functions of the present invention are.

The method for measuring this apparent vibration loss coefficient is as follows.

That is, a micro-acceleration pickup is attached to one end of the sample or the center of the handle or grip of a fishing rod and suspended, and the sample or the other end of the fishing rod (tip of the fishing rod) is tapped with a hammer to determine the maximum value at that time. Detects resonance frequencies with high impact strength. Next, set a frequency filter near the detection resonance frequency, tap the sample again with a hammer,
The attenuation waveform of the vibration is measured using an FFT analyzer (Ono Sokki).
(manufactured by NEC Corporation), and the vibration loss coefficient (η) of the waveform is measured using a microcomputer (manufactured by NEC Corporation) according to the formula of MI L-P-22581B.

[Example] Hereinafter, the present invention will be explained in more detail using examples.

As a fishing rod structure, two unidirectional prepreg sheets with a fiber weight ratio of 65% and a basis weight of 50 g/rrf are stacked in ±45° directions using epoxy resin on carbon fiber to form a 90° orthogonal prepreg sheet. did.

On the other hand, as a vibration suppressing material, polyurethane elastomer [ESTAN #54630 manufactured by Gutdrich Co., Ltd.] was spread to obtain a resin sheet with a thickness of 0.2 cm. The vibration loss coefficient of this resin sheet at 20°C is 50H2 to 5
It was 0.04 in the frequency range of K[lx. Subsequently, the above prepreg sheets were cut into predetermined trapezoids and wrapped around a steel mandrel to form a tubular laminate in which the resin sheet was the second layer from the outside and was arranged in the center of the tube ( Next, this tubular laminate was placed in a curing oven at 130°C, and
After curing for a period of time, the molded product was taken out from the mold. This molded product had a good appearance with no blisters or voids.

After going through processes such as deburring the molded product and polishing the surface, a grip and other parts were attached to make it into a fishing rod.

The weight of this fishing rod was 50 g with two pieces.

Results of measuring the apparent vibration loss coefficient of a fishing rod at 20℃
The resonance frequency is 136. It was 0°025 in OH2.

When using this fishing rod, the impact vibrations transmitted to the wrists and elbows were extremely small (compared to commercially available fishing rods and comparative examples described below) (and comfortable fishing was possible).

As a comparative example, a conventional fishing rod was obtained in the same manner as in the example without laminating the vibration suppressing material sheet.

The weight of this fishing rod was 45 g, and the apparent vibration loss coefficient was measured to be 0.006 at 20° C. and a resonance frequency of 136° OHx.

When using this fishing rod, the vibrations transmitted to the wrists and elbows were large and unpleasant.

[Effects of the Invention] The present invention significantly controls the shock vibrations that occur when catching a fish, and extremely effectively damps the transmission of the shock vibrations to the hands, body, and other parts of the body other than the part that received the shock. A hollow impact cushioning material with functions can be provided.

The fishing rod of the present invention does not cause unpleasant vibrations or tingling, satisfactorily reduces arm and elbow fatigue caused by impact vibration, does not accumulate such fatigue in the wrist, arm, elbow, etc., and does not cause vibrations other than fishing rods. You can enjoy comfortable fishing with almost no sensation.

[Brief explanation of the drawing]

1 to 4 are cross-sectional views showing various structural examples of the fishing rod of the present invention. 1: Fishing rod 2: Fiber reinforced resin layer 3: Vibration suppressing material layer Patent applicant Toshi Co., Ltd. Figure 8 Figure 2 Figure 47

Claims (6)

[Claims] (1) The fiber reinforced resin layer has a vibration coefficient of 0.0 at room temperature.
A fishing rod comprising a hollow laminate comprising at least one vibration suppressing material layer, the outermost layer of the laminate being comprised of the fiber reinforced resin layer. (2) The fishing rod according to claim 1, wherein the resin constituting the fiber-reinforced resin layer is a thermosetting resin. (3) Claim (2) wherein the thermosetting resin is a resin selected from epoxy resins and unsaturated polyester resins.
Fishing rod listed. (4) The vibration suppression material has a vibration loss coefficient of 0 at room temperature.
The fishing rod according to claim 1, wherein the fishing rod is made of a material having a molecular weight of 0.02 or higher. (5) The fishing rod according to claim 1, wherein the vibration suppressing material is an elastomer material selected from polyester resins, polyamide resins, urethane resins, and epoxy resins. (6) The fishing rod according to claim 1, wherein the deterrent material is an elastomer composition containing a filler.