JPH11127734A - Fishing rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fishing rod securing its sufficient mechanical strength while improving its flex performance through using a prepreg of very low modulus, also capable of controlling the operational rhythm and mechanical strength of the rod pipe in good balance, and free from any material bending. SOLUTION: This fishing rod comprises a rod pipe which is constructed by winding a plurality of prepregs prepared by impregnating reinforcing fibers with a synthetic resin; wherein the rod pipe 1 has a low-modulus layer 3 made using a prepreg with large axial linear expansion coefficient and low elastic modulus and a high-modulus layer 2 made using a 2nd prepreg with small axial linear expansion coefficient and an elastic modulus higher than that of the 1st prepreg, and the low-modulus layer 3 is laid inside the high-modulus layer 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishing rod and, more particularly, to a rod pipe for a fishing rod having a laminated structure formed by winding a prepreg obtained by impregnating a reinforcing fiber with a synthetic resin.

[0002]

2. Description of the Related Art In general, a rod tube of a fishing rod is wound so that various prepregs are superimposed on a core metal, and a cellophane tape is wound thereon to stabilize the rod, and then introduced into a heating furnace. The synthetic resin is thermoset, then cooled, de-centered,
It is created through the steps of peeling, polishing, and painting cellophane tape.

[0003] The characteristics of the rod tube formed in this manner vary depending on the type and alignment direction of the reinforcing fibers constituting the prepreg, the thickness and winding state of the prepreg, the amount of resin impregnation, and the like. Therefore, for example, in a through-hole rod in which a fishing line is passed through a rod tube, the inner diameter of the tip (rod tube) is ensured large to reduce the sliding resistance between the fishing line and the rod tube and to soften the condition of the rod tube. In order to maintain this, it has been proposed to form a rod pipe with a prepreg using carbon fibers having a low elastic modulus as reinforcing fibers (see Japanese Patent Publication No. 3-16086).

[0004]

When the rod tube is formed of a low elasticity prepreg as described above, the bending performance is certainly improved, but on the other hand, the material is easily bent. That is, when the modulus of elasticity is lowered, the coefficient of linear expansion generally increases, so that the finished product formed by the thermosetting treatment tends to be a rod having a bending habit.

[0005] In general, in a rod tube for a fishing rod, it is necessary to adjust the tone and strength balance between the tip and the base so that the tip is softly bent and the base has high rigidity. . Therefore, a desired tone and strength cannot be obtained simply by using a prepreg having low elasticity.

[0006] Therefore, it is common practice to form a rod pipe by combining a plurality of types of prepregs having different physical properties such as elastic modulus. However, even when a rod pipe is formed by combining a plurality of types of prepregs, depending on the lamination (winding) of the prepreg, the material may be bent in the finished product or the rod pipe may be bent only in a specific direction. It becomes something with nature. In particular, when a prepreg having an extremely low elasticity of 16 tonf / mm ² or less is used in combination to improve the bending performance, there is a problem that the strength is remarkably reduced. In a well-balanced manner.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to use a prepreg having a very low elastic modulus to improve the bending performance while securing sufficient strength. It is an object of the present invention to provide a fishing rod that can be made, and that can adjust the condition and strength of the rod tube in a well-balanced manner and that has no material bend.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a fishing rod provided with a rod pipe formed by winding a plurality of prepregs obtained by impregnating a reinforcing fiber with a synthetic resin. The rod tube has a low elastic layer formed of a prepreg having a large linear expansion coefficient in the axial direction and a low elastic modulus, and a low elastic layer having a small linear expansion coefficient in the axial direction and an elastic modulus of the prepreg of the low elastic layer. And a high elastic layer formed of a prepreg having a high elastic modulus, wherein the low elastic layer is disposed inside the high elastic layer.

Further, the present invention relates to a fishing rod provided with a rod tube formed by winding a plurality of prepregs obtained by impregnating a reinforcing fiber with a synthetic resin, wherein the rod tube has a linear expansion in an axial direction. A low elastic layer formed by a prepreg having a large modulus and a low elastic modulus, and a high elastic layer formed by a prepreg having a small linear expansion coefficient in an axial direction and having an elastic modulus higher than that of the prepreg of the low elastic layer. A prepreg having an elastic layer, the prepreg forming the low elastic layer, in the wound state, the overlap margin of the ends is set to substantially zero or a minute minus width, the prepreg forming the high elastic layer, In the wound state, the end portions are overlapped with each other with substantially zero or a very small width.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention. The rod 1 shown in FIG.
For example, it is used for the tip of a hollow rod. This rod tube 1 is made of a so-called FRP made by winding a prepreg sheet obtained by impregnating a synthetic resin into a reinforcing fiber,
FIG. 2 is a side sectional view of a portion A near the tip.
FRP has an elastic modulus of 0.2 tonf / m as a reinforcing fiber.
Carbon, boron, glass, organic fibers, etc. of m ^{2 to} 95 tonf / mm ² are used, and an epoxy resin or the like is used as a synthetic resin to be impregnated.

As shown in FIG. 2, the rod tube 1 has an innermost layer 4 as a reinforcing layer composed of a prepreg sheet in which reinforcing fibers are aligned in the circumferential direction, and reinforcing fibers aligned in the longitudinal direction. Intermediate layer 3 composed of prepreg sheet
And an outermost layer 2 composed of a prepreg sheet in which reinforcing fibers are aligned in the circumferential direction. Each layer 2,
The direction in which the reinforcing fibers forming the layers 3 and 4 are aligned is not limited to this, and the number of turns (the number of plies) and the thickness of the prepreg sheet are appropriately set according to the required characteristics.

The prepreg sheet forming the intermediate layer 3 is as follows:
The prepreg sheet forming the outermost layer 2 has a large linear expansion coefficient in the axial direction and a low elastic modulus, and the prepreg sheet having a small linear expansion coefficient in the axial direction and an elastic modulus of the intermediate layer 3 is used. Is set higher than Specifically, the prepreg sheet of the intermediate layer 3 has an elastic modulus of 20.
The prepreg sheet of the outermost layer 2 has an elastic modulus of less than tonf / mm ² , preferably 10 tonf / mm ² or less.
It is set to 0 tonf / mm ² or more, preferably 30 tonf / mm ² or more. The thickness of the intermediate layer 3 is set to be larger than that of the outermost layer 2. Of course, the thickness of the intermediate layer 3 may be set smaller than that of the outermost layer 2.

The innermost layer 4 may not be provided. The intermediate layer 3 may partially include a prepreg sheet forming the outermost layer 2 or a prepreg sheet forming the innermost layer 4.

As described above, according to this embodiment, the low elastic prepreg having a large linear expansion coefficient is provided on the inner layer side, and the high elastic prepreg having a small linear expansion coefficient is provided outside the prepreg. Since the intermediate layer 3 is formed by a prepreg sheet having a large linear expansion coefficient and a low elastic modulus, and the outermost layer 2 is formed by a prepreg sheet having a small linear expansion coefficient and a high elastic modulus, the deformation of the low elastic prepreg sheet is reduced. (Material bending) is suppressed by the highly elastic prepreg sheet (deformation and the like are reduced). Therefore, a sufficient strength can be secured while improving the bending performance, the material can be prevented from being bent, and the tone and strength of the rod pipe can be adjusted in a well-balanced manner. Such a configuration of the present embodiment is 16 tonf / m in order to improve the bending performance.
It is particularly advantageous when using prepreg m ² or less of extremely low modulus.

FIG. 3 shows a cross-sectional view of a rod tube 1a according to a second embodiment of the present invention. As shown in the drawing, the rod pipe 1a of the present embodiment has an innermost layer 4 as a reinforcing layer constituted by a prepreg sheet in which reinforcing fibers are aligned in the circumferential direction.
And an intermediate layer 3 made of a prepreg sheet in which reinforcing fibers are aligned in the longitudinal direction, and an outermost layer 2 made of a prepreg sheet in which reinforcing fibers are aligned in the circumferential direction. Of course, the alignment direction of the reinforcing fibers forming the layers 2, 3, and 4 is not limited to this, and the thickness of the prepreg sheet is appropriately set according to required characteristics.

The intermediate layer 3 is formed by two prepreg sheets 3a and 3b wound one ply at a time. In this case, each of the prepreg sheets 3a and 3b is cut so as to have a width such that both ends 5, 6 do not overlap when actually wound. That is, each prepreg sheet 3a,
In the winding 3b, both ends 5, 6 are substantially abutted against each other at the time of winding to form no overlap margin (the overlap margin is set to substantially zero). Needless to say, both ends 5 and 6 may be slightly separated from each other (approximately 1 mm or less) at the time of winding (that is, the overlap margin may be set to a minute minus width).

The prepreg sheet forming the innermost layer 4 is cut to have a width in which both ends 7, 8 overlap by a predetermined amount when actually wound. In this case, end 7,
The overlap margin between the eight is preferably set to 1 mm or more. Further, the prepreg sheet forming the outermost layer 2 is cut in a width dimension such that both end portions 9 and 10 thereof overlap when they are actually wound. That is, the prepreg sheet forming the outermost layer 2 is in the wound state, and the end portions 9 and
The overlapping margin between the ten is set to substantially zero or a very small width. Of course, the overlap may be set large. Here, the overlap margin not only refers to the overlap width when the ends of the prepreg sheets are in direct contact and overlap with each other at the time of winding one ply, but also the ends of the prepreg sheets are halfway at the time of winding several ply. It also includes the overlap width when overlapping indirectly via the sheet portion.

In the present embodiment, as in the first embodiment, the prepreg sheet forming the intermediate layer 3 has a large linear expansion coefficient in the axial direction and a low elastic modulus, and the outermost layer 2 Is set to have a small linear expansion coefficient in the axial direction and a higher elastic modulus than that of the prepreg sheet of the intermediate layer 3. Specifically, the prepreg sheet of the intermediate layer 3 has an elastic modulus of 20 tonf / m.
less than m ^2, preferably it is set below 10tonf / mm ^2,
The prepreg sheet of the outermost layer 2 has an elastic modulus of 20 tonf.
/ mm ² or more, preferably 30 tonf / mm ² or more.

As described above, according to the present embodiment, the low elastic prepreg having a large linear expansion coefficient is provided on the inner layer side, and the high elastic prepreg having a small linear expansion coefficient is provided on the outside thereof. The same operation and effect as in the first embodiment can be obtained. In addition, since the overlapping margin of the low elastic prepreg having a large linear expansion coefficient is set to 0 or a minute minus width, the uneven thickness in the circumferential direction is reduced, the material is prevented from bending, and other prepregs (for example, a high prepreg having a small linear expansion coefficient) are used. Since the overlap margin is secured to some extent by the elastic prepreg, the strength can be stabilized and improved. In general, when a prepreg sheet is wound, the ends thereof inevitably overlap each other (the front surface of one end and the back surface of the other end overlap), so that a thick portion is formed in a part in the circumferential direction. Would. As described above, if a thick portion is formed in the circumferential direction, problems such as variations in directionality (bending of material, etc.) and strength of the rod tube and an increase in weight occur. However, if the overlapping margin of the low elastic prepreg having a large linear expansion coefficient is set to 0 or a minute minus width as in the present embodiment, the thickness deviation in the circumferential direction can be reduced by that amount, and The resulting strength deterioration or the like can be compensated for by the overlap allowance of another prepreg (for example, a high elasticity prepreg).

FIG. 4 shows a third embodiment of the present invention. The rod pipe of the present embodiment has a main body layer 20 formed over the entire length. The main body layer 20 includes an innermost layer 4 composed of a prepreg sheet 4a in which reinforcing fibers are aligned in the circumferential direction, and two low-elastic prepreg sheets 3a, 3b in which reinforcing fibers are aligned in the longitudinal direction. Middle layer 3,
The outermost layer 2 is composed of a highly elastic prepreg sheet 2a in which reinforcing fibers are aligned in the longitudinal direction.

On the main body layer 20 (exactly the outermost layer 2) located at the base of the rod tube, a reinforcing layer 15 for reinforcing the base of the rod tube is provided.
Are formed. This reinforcing layer 15 is composed of two stepped auxiliary prepreg sheets 1 in which reinforcing fibers are aligned in the longitudinal direction.
5a and 15b. Each auxiliary prepreg sheet 15
a and 15b are three winding portions 2 wound one ply at a time.
0, 21 and 22 and each winding part 20, 21 and 22
No. 2 differs in the length in the major axis direction. Therefore, at the base of the rod tube, the reinforcing layer 1 is gradually stepped toward the end.
5 becomes thicker. Also, on the outer periphery of the reinforcing layer 15,
A prepreg 31 for forming a joint formed by backing a woven fabric 31
Is wound. In the prepreg 31, the reinforcing fibers are aligned in the longitudinal direction, and constitute a seam (thick wall) of the front and rear rod pipes.

The reinforcing layer 15 may be constituted by one prepreg sheet. In addition, the innermost layer 4 may not be provided, and its elastic modulus is arbitrarily set. Also,
The direction in which the reinforcing fibers forming each of the layers 2, 3, and 4 are aligned is not limited to the above-described embodiment, and the number of turns (the number of plies) and the thickness of each prepreg sheet are appropriately set according to required characteristics.

In the rod tube having such a laminated structure, each prepreg sheet is sequentially wound around a cored bar 40, and thereafter, a conventional method, that is, a process such as a heating process, a cooling process, a decentering process, a polishing process, a painting process, etc. Molded. Of course, each sheet is arbitrarily attached in advance, and this is integrally
It may be wound around zero.

Next, each of the layers 2, 3, 15 of the rod tube having the above-described structure is described.
Conditions are listed for each item. (1) Linear Expansion Coefficient The linear expansion coefficients of the prepregs 3 a and 3 b forming the intermediate layer 3 are set to be higher than those of the prepreg 2 a forming the outermost layer 2. Specifically, the linear expansion coefficient of the prepreg 2a of the outermost layer 2 is set to 1 × 10 ⁻⁶ / ° C. or less, and the linear expansion coefficient of the prepreg of the intermediate layer is 2 × 10 ⁻⁶ / ° C. or more (or 10 × 10 ⁻⁶ / ° C.). ⁻⁶ / ° C. to 100 × 10 ⁻⁶ / ° C., or 10 × 10 ⁻⁶ / ° C. to 50 × 10 ⁻⁶ / ° C.). The linear expansion coefficients of the auxiliary prepregs 15a and 15b are set to 1 × 10 ⁻⁶ / ° C. or less, and preferably smaller than the prepreg 2a of the outermost layer 2. In this case, the linear expansion coefficients of the two auxiliary prepregs 15a and 15b are set to be the same (or substantially the same).

As described above, if the intermediate layer 3 having a large linear expansion coefficient is formed inside the outermost layer 2, the influence of the linear expansion coefficient can be reduced, and material bending can be effectively prevented. Further, by setting the linear expansion coefficient of the auxiliary prepregs 15a and 15b to be smaller than that of the outermost layer 2, the influence of the linear expansion coefficient in the major axis direction or the like can be further reduced, and the material bending at the base of the rod pipe can be reduced. It can be effectively prevented. If the linear expansion coefficients of the auxiliary prepregs 15a and 15b are not set smaller than that of the outermost layer 2, the auxiliary prepregs 15a and 15b
If b is provided inside the outermost layer 2, the material can be prevented from bending at the base of the rod tube. Further, the linear expansion coefficients of the two auxiliary prepregs 15a and 15b are the same (or substantially the same).
By setting to, material bending can be further prevented. (2) Elastic Modulus As described above, the elastic modulus of the prepreg 2a forming the outermost layer 2 is set higher than that of the prepregs 3a and 3b forming the intermediate layer 3. Specifically, the elastic modulus of the outermost layer 2 of the prepreg 2a is 20tonf / mm ² or more, preferably set to 30tonf / mm ² or more, prepreg 3a of the intermediate layer 3, the elastic modulus of 3b is 20tonf / mm less than ^2, Preferably 10 tonf / mm ² or less, more preferably 0.3 tonf / mm ²
/ mm ^{2 to} 1.9 tonf / mm ² . Also,
The elastic modulus of the auxiliary prepregs 15a, 15b is set higher than that of the prepregs 3a, 3b of the intermediate layer 3, and preferably, the prepregs 2a, 3 of the intermediate layer 3 and the outermost layer 2.
It is desirable to set higher than those of a and 3b and set to 24 tonf / mm ² or more.

The prepregs 2 a and 3 of the outermost layer 2 and the intermediate layer 3
If the elastic modulus of a and 3b is set in this manner, the rigidity of the rod can be adjusted with good balance, and the flexibility of the rod can be improved. Also, by setting the elastic modulus of the auxiliary prepregs 15a and 15b wound around the base of the rod tube in this manner, the strength balance and tone balance between the tip and the base of the rod tube can be improved. (3) Resin Impregnation (RC) The resin impregnation of the prepregs 3 a and 3 b forming the intermediate layer 3 is set to be greater than that of the prepreg 2 a forming the outermost layer 2. Specifically, the prepregs 3a,
The resin impregnation amount of 3b is preferably set to 40 wt% to 80 wt% (or less than this value), and the resin impregnation amount of the outermost prepreg is set to 20 wt% to 60 wt%. The amount of resin impregnation of the auxiliary prepregs 15a, 15b is set to be less than that of the prepregs 3a, 3b of the intermediate layer 3, and is preferably smaller than that of the prepregs 2a, 3a, 3b of the intermediate layer 3 and the outermost layer 2. It is set, for example, to 15 wt% to 35 wt%.

Prepregs 3a and 3b for forming the intermediate layer 3
By setting the resin impregnation amount of such a large value, the bending elastic modulus of the prepreg in the axial direction (bending rigidity of the rod tube) can be reduced, and a rod tube which is easily bent and hardly damaged even if bent greatly can be formed. Can be. In addition, the auxiliary prepreg 15
By setting the resin impregnation amounts of “a” and “15b” to be small as described above, it is possible to form a lightweight and high-rigidity rod tube. (4) Material The reinforcing fibers of the prepreg forming each of the layers 2, 3 and 15 may be arbitrarily set, but preferably, the prepreg 2a forming the outermost layer 2 is formed of carbon fiber or the like, and the intermediate layer 3 is formed. The prepregs 3a and 3b use carbon fibers, flame-resistant fibers, organic fibers such as acrylic, and the like, and the auxiliary prepregs 15a use carbon fibers. In particular, each layer 2,
If carbon fibers are used for all of the reinforcing fibers of the prepregs forming the prepregs 3, 15, the difference in linear expansion coefficient can be reduced, and the material can be prevented from bending.

As the impregnating resin of the prepreg forming each of the layers 2, 3, and 15, an epoxy resin is used. (5) Strength This strength is arbitrarily changed according to the above three conditions, but is set so as to satisfy the following conditions as a whole. That is, the prepreg 2 forming the outermost layer 2
The prepregs 3 a and 3 b forming the intermediate layer 3 are set to have the greatest elongation than the prepreg 2 a of the outermost layer 2. Further, in order to increase the buckling strength of the prepregs 3a, 3b of the intermediate layer 3, the fiber diameter of the prepregs 3a, 3b of the intermediate layer 3 is set large. In this case, the fiber diameter is set to 8 μm or more and 100 μm or less or 10 μm or more and 100 μm or less. It is desirable that the strength of the auxiliary prepregs 15a and 15b is also large.

By setting the strength of the prepregs 2a, 3a, 3b of the intermediate layer 3 and the outermost layer 2 in this way, not only the strength of the rod pipe can be increased, but also the flexibility can be improved. Further, if the fiber diameter of the prepregs 3a and 3b of the intermediate layer 3 is set to such a large value, the buckling strength can be improved even with low elasticity. (6) Number of layers and thickness a. The front end of the rod pipe is composed of a combination layer of the outermost layer 2 and the intermediate layer 3, and the base of the rod pipe has a reinforcing layer 15 in addition to these layers 2 and 3.

B. The ratio of the intermediate layer 3 is increased at the tip of the rod tube, and the ratio of the outermost layer 2 and the reinforcing layer 15 is increased at the base of the rod tube. However, the intermediate layer 3 is desirably in the range of 50 to 90% of the whole, but may be smaller.

C. In the middle portion of the rod tube, the balance is adjusted in tone and strength. Preferably, the middle layer 3 is set in a range of 50 to 150% of the outermost layer 2. d. It is desirable that the outermost layer 2 be larger than the intermediate layer 3 at the base (base end) of the rod tube. Further, it is desirable that the number of the reinforcing layers 15 be larger than that of the outermost layer 2.

By setting the number of layers and the layer thickness in this way,
Alternatively, if a to d are arbitrarily combined, the bending of the tip portion of the rod pipe can be increased, the rigidity of the base portion can be increased, the tone can be improved, and the strength can be improved.

It is desirable that all of the above conditions (1) to (6) are satisfied, but they may be arbitrarily selected and applied. Further, the above conditions are not limited to the third embodiment, but are applicable to the first and second embodiments.

[0034]

As described above, according to the present invention,
While using a prepreg having a very low elastic modulus to improve the bending performance, sufficient strength can be secured, and
It is possible to provide a fishing rod having no bent material, which can adjust the condition and strength of the rod tube in a well-balanced manner.

[Brief description of the drawings]

FIG. 1 is a side view of a rod pipe for a fishing rod according to a first embodiment of the present invention.

FIG. 2 is a side sectional view of a portion A in FIG. 1;

FIG. 3 is a cross-sectional view of a rod tube for a fishing rod according to a second embodiment of the present invention.

FIG. 4 is a view showing a configuration of a prepreg of a rod tube for a fishing rod according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rod pipe 2 ... Outermost layer (high elastic layer) 3 ... Intermediate layer (low elastic layer) 2a, 3a, 3b, 15a, 15b ... prepreg

Claims (3)

[Claims] 1. A fishing rod having a rod tube formed by winding a plurality of prepregs obtained by impregnating a reinforcing fiber with a synthetic resin, wherein the rod tube has a large linear expansion coefficient in an axial direction and A low elastic layer formed of a prepreg having a low elastic modulus, and a high elastic layer formed of a prepreg having a small linear expansion coefficient in an axial direction and an elastic modulus higher than that of the prepreg of the low elastic layer. A fishing rod, wherein the low elastic layer is disposed inside the high elastic layer. 2. A fishing rod having a rod tube formed by winding a plurality of prepregs obtained by impregnating a reinforcing fiber with a synthetic resin, wherein the rod tube has a large linear expansion coefficient in an axial length direction and A low elastic layer formed of a prepreg having a low elastic modulus, and a high elastic layer formed of a prepreg having a small linear expansion coefficient in an axial direction and an elastic modulus higher than that of the prepreg of the low elastic layer. In the prepreg forming the low elastic layer, in the wound state, the overlapping margin between the ends is set to substantially zero or a minute minus width, and the prepreg forming the high elastic layer is in the wound state. A fishing rod characterized in that the ends are overlapped with each other with substantially zero or minute width. 3. A prepreg having a higher elastic modulus and a higher linear expansion coefficient than a prepreg forming a high elastic layer is wound around the base of the rod tube outside the high elastic layer. The fishing rod according to claim 1 or 2, wherein