JP4107540B2 - Jointed fishing rod - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint type fishing rod.
[0002]
[Prior art]
For example, a fishing rod disclosed in Japanese Patent Application Laid-Open No. 9-248103 is a joint type fishing rod that performs fishing by joining the connecting portion X1 of the tip rod to the head holding rod. In a joint type fishing rod, since one rod pipe is generally a female type and the other rod is a male type, the male rod is bent at the rear end of its joining region due to bending when a fish is caught. However, the pressing force is concentrated on the inner surface of the female soot tube.
[0003]
[Problems to be solved by the invention]
The joint area is inevitably high in bending rigidity because both ridges overlap, but the bending area suddenly changes at the end of the joint area because the front and rear areas are independent ridge areas. Stress concentration occurs due to bending. In the case of the form of this publication, the tip part of the joining region has a diameter larger than that of the tip, so that it is somewhat strong against stress concentration. Damage is likely to occur.
Therefore, an object of the present invention is to provide a fishing rod having a front side rod that can prevent stress concentration on the rear side rod tube at the rear end portion of the joining region in the joint type fishing rod.
[0004]
[Means for Solving the Problems]
In view of the above-mentioned object, in claim 1, the front ridge is a solid ridge made of fiber-reinforced resin that is spliced in a side-by-side manner with respect to the rear ridge, and a center layer and an outer layer on the outer side thereof. The outer layer uses reinforcing fibers so that the bending rigidity is lower as the rigidity characteristic of the layer material than the center layer, and the outer diameter of the center layer is the rear end portion of the joint region rather than the front end portion. The thickness of the outer layer is small and the rear end portion is thicker than or equal to the front end portion of the joining region. The outer layer has lower bending stiffness as the stiffness characteristic of the layer material than the center layer, when the fiber direction is the same, it is to use a reinforcing fiber having a small elastic modulus, and when the elastic modulus is the same or large, The fiber direction is close to the circumferential direction (circumferential direction or inclined direction), the fiber density is small, and the like, and these may be combined.
[0005]
The front side ridge can be formed with lower bending rigidity at the rear end of the joining region than at the front end. For this reason, when bending occurs in the fishing rod, stress concentration on the rear side rod by the rear end portion of the joining region of the front side rod can be mitigated and prevented. That is, it can be said that the pressing part of the tip side heel at the time of bending is configured flexibly.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail based on an embodiment shown in the accompanying drawings.
FIG. 1 is a longitudinal sectional view of an essential part of a joint type fishing rod according to the present invention, FIG. 2 shows a manufacturing process of a tip rod 12, and FIG. 3 is an enlarged view near a joining region. The hot pot 10 and the hot pot 12 are spliced together in the joint region TZ. The head ridge 12 is a solid ridge, and is formed by winding prepreg sheets P1, P2, P3 around the outer periphery of the core portion 14, and heating and firing.
[0007]
Here, the core part is made of fiber reinforced resin using glass fibers aligned in the axial length direction as reinforced fibers and epoxy resin as a matrix, and is formed into a columnar shape or a tapered shape, and the surface is ground after firing. It forms in the form of FIG. That is, the front part is a tapered part 14A, the immediate rear part is a front thick reverse taper part 14B, the rear part is a straight part 14C, and the rear end part is a reverse taper part 14D. In the prepreg P1, carbon fibers are aligned in the axial length direction, impregnated with an epoxy resin (the same applies to others), and wound around a region excluding the tapered portion 14A of the core portion. Similarly, in the prepreg P2, the carbon fibers are aligned in the axial direction, and are wound around a region excluding the tapered portion 14A and the reverse tapered portion 14B. Both prepregs are cut into a tapered shape from near the boundary between the reverse tapered portion 14D and the straight portion 14C. In this region, the thickness gradually decreases forward as shown in FIG. ing.
[0008]
Finally, the prepreg P3 is wound around the reverse tapered portion 14D region, and the carbon fiber as the reinforcing fiber is oriented in the circumferential direction orthogonal to the axial direction.
In this way, the outer periphery of the joining region of the material obtained by pressurizing and firing several prepregs wound around the core portion, the outer periphery within the range of the winding layer of the prepreg P3 is ground, painted, and then subjected to coating. To complete. When this joining region TZ of the spikelet is inserted and joined to the leading joint region of the hot pot 10, the outer periphery 12S including the joining region of the spikelet is a portion near the front end F (hereinafter referred to as the front end portion F). And a portion near the rear end R (hereinafter referred to as the rear end portion R), a gap is formed with respect to the inner surface of the joining region of the hochi mochi. Further, from the vicinity of the front end F to the front predetermined position, a front thick reverse taper portion 12T ′ is formed.
[0009]
Referring to FIG. 3, the layer made of prepreg sheets P1 and P2 is 16A, the orientation direction of the carbon fiber is the axial direction layer similarly to the glass fiber direction of the core portion, and the layer made of prepreg P3 is 16B. . These layers 16 </ b> A and 16 </ b> B are shown together as a prepreg sheet winding layer 16. In this example, the center layer referred to in the claims is the core portion 14 and the layer 16A, and the outer layer is the layer 16B. That is, in the outer layer, since the orientation direction of the carbon fiber is the circumferential direction, it hardly contributes to the bending rigidity, and in the center layer, both the glass fiber and the carbon fiber are oriented in the axial length direction. The bending rigidity is lower as the rigidity characteristic of the layer material. In the rear end portion R, compared to the front end portion F of the joining region, the outer diameter of the center layer is small and the thickness of the outer layer is thick. Therefore, the bending rigidity of the rear end portion is lower than that of the front end portion, and stress concentration on the panicle ridge at this portion is prevented from being relaxed.
As a modification of this embodiment, the carbon fiber of the prepreg sheet P1 and the carbon fiber of P1 is smaller than the glass fiber of the core part, and the orientation direction of the carbon fiber of the prepreg sheet P2 is a circle like the prepreg sheet P3. In the circumferential direction, the prepreg sheet winding layer 16 can be an outer layer.
[0010]
FIG. 4 corresponds to FIG. 2 and is a diagram illustrating a process for forming a spikelet of a reference form . FIG. 5 is a cross-sectional view of a state in which the spikelet 12 is joined to the spike holder 10 in a side-by-side manner. Explaining mainly the difference from the case of FIG. 2 and FIG. 3, the same carbon fiber is reinforced in the core portion 14 in which the front tapered portion 14D ′ is formed instead of the reverse tapered portion 14D in the rear end portion of FIG. Three types of prepreg sheets P1, P2, and P3 ′ that are fibers are wound. In the prepreg sheet P3 ′, the orientation direction of the carbon fiber which is the reinforcing fiber is oriented in the axial direction as in the other prepreg sheets P1 and P2. After pressure firing, the outer periphery of the layer 16B by this prepreg P3 ′ is ground to form the outer periphery 12S including the joining region TZ.
[0011]
In this example, the central layer is the core portion 14, and the outer layer is the prepreg sheet winding layer 16 in which the layers 16 </ b> A and 16 </ b> B are combined. That is, the central layer 14 is made of glass fiber as the reinforcing fiber, and the outer layer 16 is made of carbon fiber (excluding carbon fiber whose elastic modulus is less than or equal to glass fiber) and is oriented in the axial length direction. The outer layer has a high bending rigidity as a rigidity characteristic of the layer material. In the rear end portion R rather than the front end portion F of the joining region, the outer diameter of the center layer is larger and the thickness of the outer layer is thinner. Therefore, the bending rigidity of the rear end portion can be made lower than that of the front end portion of the joining region, and stress concentration on the panicle rod 10 at this portion can be prevented from mitigating.
[0012]
FIG. 6 is a cross-sectional view showing another example of the reference form , in which the tip ridge 12 is spliced together with the head holding pod 10 in a swing-out manner. As for the spike end 12, the rear end part of the core part 14 in which the carbon fibers are aligned in the axial length direction is a thick reverse taper part 14D as in FIG. 2, and the carbon fiber is oriented in the axial length direction outside thereof. Thus, the layer 16A is formed by winding the prepreg sheet. Further, on the outer side, a prepreg sheet is wound so that the carbon fibers are oriented in the circumferential direction to form a layer 16B, and the outer periphery 12T is formed into a pre-tapered shape by grinding or the like.
[0013]
In this example, the central layer is the core portion 14 and the layer 16A, and the outer layer is the layer 16B. That is, in the outer layer, since the orientation direction of the carbon fiber is the circumferential direction, it hardly contributes to the bending rigidity, and in the center layer, the carbon fiber is oriented in the axial length direction, so the outer layer is more oriented. Bending rigidity is low as a rigidity characteristic of the layer material. In the rear end portion R of the joining region TZ, the outer diameter of the central layer is small and the thickness of the outer layer is thicker. Therefore, the bending rigidity of the rear end portion R can be made lower than that of the front end portion F, and stress concentration on the panicle rod 12 at this portion can be prevented from mitigating.
[0014]
FIG. 7 is a cross-sectional view showing another example of the reference form , in which the spike basket 12 is joined to the spike holder 10 in a swing-out manner. The tip end 12 has a tapered end 14D ′ of the core portion 14 in which the glass fibers are aligned in the axial length direction as in the case of FIG. 4, and the carbon fiber is oriented in the axial length direction outside thereof. Two prepreg sheets are wound around to form a layer 16A and a layer 16B. The outer periphery 12T is formed in a pre-thin taper shape without grinding.
[0015]
In this example, the central layer is the core portion 14, and the outer layer is the prepreg winding layer 16 in which the layers 16 </ b> A and 16 </ b> B are combined. That is, since the outer layer is carbon fiber and the center layer is glass fiber oriented in the axial direction, when the elastic modulus of carbon fiber is larger than that of glass fiber, the outer layer is more rigid than the layer material. The bending rigidity is high as a characteristic. In the rear end portion R of the joining region TZ, the outer diameter of the central layer is larger and the thickness of the outer layer is thinner. Therefore, the bending rigidity of the rear end portion R can be made lower than that of the front end portion F, and stress concentration on the panicle rod 12 at this portion can be prevented from mitigating.
[0016]
In the above, it was a splicing of the head spear and the Homochi spear, but it may be a splicing of other spears. Further, in the case of the side-by-side type, the rear side ridge may be a ridge having a solid ridge as a basic shape and a joining portion formed hollow.
[0017]
【The invention's effect】
As is apparent from the above description, according to the present invention, it is possible to provide a joint type fishing rod having a front side rod that can prevent relaxation of stress concentration on the rear side rod tube at the rear end portion of the joining region.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an essential part of a joint type fishing rod according to the present invention.
FIG. 2 is a production diagram of the spikelet of FIG.
FIG. 3 is an enlarged view of a main part of FIG.
FIG. 4 is a production diagram of a spikelet of a reference embodiment example .
FIG. 5 is a longitudinal sectional view of a main part of a joint type fishing rod according to another reference embodiment .
FIG. 6 is a longitudinal sectional view of a main part of a joint type fishing rod according to another reference embodiment .
FIG. 7 is a longitudinal sectional view of a main part of a joint type fishing rod according to another reference embodiment .
[Explanation of symbols]
10 Ho Mochi (Rear Side)
12 Earhead (front side)
14 Core part

Claims (1)

It is a solid reinforced resin made of fiber reinforced resin where the front side heel is spliced together with the rear side heel, and has a center layer and an outer layer outside the center layer. As the stiffness characteristics of the layer material, reinforcing fibers are used so that the bending rigidity is low, the outer diameter of the center layer is smaller at the rear end portion than the front end portion of the joining region, and the wall thickness of the outer layer is A joining type fishing rod characterized in that the rear end part is thicker or the same as the front end part of the joining region.

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