JP2019176769A - Fishing rod having rod body with fiber reinforced resin layer wound in core material and its manufacturing method - Google Patents

Abstract

To provide a fishing rod with a tip rod that is superior in torsional strength and torsional rigidity.SOLUTION: A fishing rod includes a rod body 1, and the rod body 1 includes a core material extending to the longitudinal axis direction and a fiber reinforced resin layer 12 wound in the core material. The fiber reinforced resin layer 12 comprises a prepreg sheet containing liquid crystalline polyester fibers. where the tensile modulus of elasticity measured according to JIS K 7161 of the liquid crystalline polyester fiber is 500-1100 cN/dtex, and the tensile break strength measured according to JIS K 7161 of the liquid crystalline polyester fiber is 20-33 cN/dtex.SELECTED DRAWING: Figure 2

Description

The present invention relates to a fishing rod having a rod body in which a fiber reinforced resin layer is wound around a core material and a method for manufacturing the same.

  2. Description of the Related Art Conventionally, a fishing rod having a solid rod body having a core material and a fiber reinforced resin layer wound around the core material is known. A core material consists of various resin, such as carbon fiber reinforced resin, and is formed so that it may taper toward the tip side. Such fishing rods are disclosed in, for example, Japanese Patent Laid-Open Nos. 2000-209982, 2001-190185, and 2005-218459.

  As described in the above publication, the fiber reinforced resin layer wound around the core material in the conventional casing is provided to improve the fracture strength and the bending rigidity of the casing.

The fiber reinforced resin layer wound around the core material is formed from a prepreg sheet in which a reinforced fiber is impregnated with a synthetic resin. As described in the above publication, carbon fibers and glass fibers are mainly used as the reinforcing fibers of the fiber reinforced resin layer.

JP 2000-209982 A JP 2001-190185 A Japanese Patent Laid-Open No. 2005-218459

  In general, the tip must be highly flexible. In the said patent document 1, when carbon fiber is used as a reinforced fiber of a fiber reinforced resin layer, the problem that it is difficult to obtain the flexibility of a spike tip is pointed out. It is not desirable to use a carbon fiber-containing fiber reinforced resin layer at a site close to the tip.

  Organic fiber (for example, polyester fiber) having a lower elastic modulus than carbon fiber is used as a reinforcing fiber for the fiber reinforced resin layer because it has a higher elongation (20% or more) than carbon fiber, and is used in fishing rods that undergo repeated deformation. Then, there is a problem that the fibers are stretched, and as a result, the initial reinforcing effect cannot be obtained.

  Kevlar has a lower elastic modulus and lower elongation (2.4-4.4%) than carbon fiber. However, Kevlar has high water absorption (3 to 7%), and therefore has a large dimensional change in the environment and low weather resistance. For this reason, it is not suitable for use on a fishing rod used outdoors on the waterside.

  On the other hand, when glass fiber is used as the reinforcing fiber of the fiber reinforced resin layer, there is a problem that the weight of the spikelet is increased.

  When the fishing rod is used, a large torsional stress acts on the tip rod. In order to prevent the tip of the tip from breaking due to the torsional stress, it is desirable that the tip has a high torsional strength.

  Further, in order to transmit the operation at the hand of the fishing rod to the device through the tip rod, it is desirable that the tip rod has high torsional rigidity. That is, in order to improve the operability of the fishing rod, it is desired that the tip rod has high torsional rigidity.

  One of the specific objects of the present invention is to provide a fishing rod having a tip rod having excellent torsional strength and torsional rigidity. Other objects of the present invention will become apparent by referring to the entire specification.

A fishing rod according to one embodiment of the present invention includes a rod body, and the rod body includes a core member extending in a longitudinal axis direction and a fiber reinforced resin layer wound around the core member. In this embodiment, the fiber reinforced resin layer is composed of a prepreg sheet containing liquid crystal polyester fiber, and the tensile elastic modulus of the liquid crystal polyester fiber measured according to JIS K 7161 is 500 to 1100 cN / dtex, The tensile breaking strength measured according to JIS K 7161 of the liquid crystal polyester fiber is 20 to 33 cN / dtex.

  The casing of the above aspect is reinforced by a fiber reinforced resin layer composed of a prepreg sheet containing liquid crystal polyester fibers having a tensile modulus of 500 to 1100 cN / dtex and a tensile breaking strength of 20 to 33 cN / dtex. Has high torsional strength and high torsional rigidity. In addition, the liquid crystal polyester fiber contained in the fiber reinforced resin layer has a low elongation (about 2.3 to 3.8%), a low water absorption (less than 0.1%), and a high weather resistance. Can be used.

  In one aspect of the present invention, the fiber reinforced resin layer is a sheet in which the liquid crystal polyester fibers are knitted in a triaxial direction.

  In one aspect of the present invention, the liquid crystal polyester fiber includes a first fiber extending in a circumferential direction around the longitudinal axis, and a second fiber extending at a predetermined angle with respect to the longitudinal axis direction, And a third fiber extending at a predetermined angle with respect to the longitudinal axis direction.

  According to the above aspect, the torsional strength and the torsional rigidity can be effectively improved by the second fiber and the third fiber.

  The fishing rod according to one aspect of the present invention further includes a first fishing line guide provided at a tip of the rod and a second fishing line guide provided behind the tip of the rod, The fiber reinforced resin layer is wound around the core between the first fishing line guide and the second fishing line guide.

  In a fishing rod housing, breakage tends to occur at a portion between a first fishing line guide provided at the tip of the fishing rod and a second fishing line guide behind the first fishing line guide. Since the part is small in diameter and high in flexibility, it is likely to bend greatly depending on the method of use, and thus easily breaks. According to the said aspect, the site | part between a 1st fishing line guide and a 2nd fishing line guide can be reinforced.

According to various embodiments of the present invention, it is possible to provide a fishing rod having a rod body excellent in torsional strength and torsional rigidity.

It is a figure showing typically a fishing rod by one embodiment of the present invention. It is sectional drawing which shows typically the cross section of the tip vicinity of the fishing rod shown in FIG. It is sectional drawing which follows the AA line of the fishing rod of FIG. It is a schematic perspective view which shows the structure of the prepreg sheet | seat which fixes the fixing | fixed part of a fishing line guide with respect to a rod. It is sectional drawing along the AA line of FIG. It is a graph which shows the measurement result of the winding amount of a fishing line until a test piece is destroyed in a winding test. It is a graph which shows the measurement result of winding torque when a test piece is destroyed in a winding test. It is a graph which shows the maximum torsion torque measured in the torsion test. It is a graph which shows the initial gradient of the graph which took the twist angle obtained by the torsion test on the horizontal axis, and took the torsion torque on the vertical axis.

  Hereinafter, various embodiments of the present invention will be described with reference to the drawings as appropriate. In addition, the same referential mark is attached | subjected to the component which is common in each drawing. It should be noted that the drawings are not necessarily drawn to scale for convenience of explanation.

  FIG. 1 is a schematic diagram showing a configuration of a fishing rod according to an embodiment of the present invention. As shown in FIG. 1, a fishing rod R according to an embodiment of the present invention includes a housing 1 that extends in the longitudinal axis AX direction, and a reel 2 that is detachably attached to the housing 1 via a reel sheet 3. , And a grip 4 attached to the proximal end side of the housing 1. At least one fishing line guide is attached to the housing 1. In the example of FIG. 1, four fishing line guides 5-1 to 5-4 are attached to the housing 1. A fishing line (not shown) fed out from the reel 3 is guided to the tip of the rod 1 by fishing line guides 5-1 to 5-4. Each of the fishing line guides 5-1 to 5-4 includes a pipe-shaped attachment portion and a guide ring provided on the attachment portion. Each of the fishing line guides 5-1 to 5-4 is attached to the housing 1 by inserting the housing 1 into the attachment portion.

  The casing 1 will be further described with reference to FIGS. 2 and 3. 2 is a cross-sectional view of the housing 1 cut along a plane passing through the longitudinal axis AX, and FIG. 3 is a cross-sectional view taken along the line AA of FIG. In FIG. 2, only the vicinity of the tip of the housing 1 is shown for convenience of explanation. As illustrated, the housing 1 includes a solid body 11 serving as a core material, and a fiber reinforced resin layer 12 wound around the solid body 11.

  The solid body 11 is a rod-shaped member that is processed so as to have a smaller diameter as it approaches the tip. The solid body 11 extends in the longitudinal axis AX direction. In one embodiment, the solid body 11 is made of a fiber reinforced resin obtained by impregnating a carbon fiber, a glass fiber, or various other reinforcing fibers with a synthetic resin (for example, unsaturated polyester).

  The fiber reinforced resin layer 12 is wound around the solid body 11. In one embodiment, the fiber reinforced resin layer 12 is wound around the solid body 11 in a region between the fishing line guide 5-1 and the fishing line guide 5-2 in the longitudinal axis AX direction. For example, the fiber reinforced resin layer 12 is provided at a position that does not overlap the fishing line guide 5-1 and the fishing line guide 5-2 in a region between the fishing line guide 5-1 and the fishing line guide 5-2 in the longitudinal axis AX direction. It is done. For example, the fishing line guide 5-1 has a pipe-shaped fixing portion, and a portion of 5 to 20 mm from the tip of the solid body 11 is inserted into the fixing portion. At this time, the fiber reinforced resin layer 12 is provided on the solid body 11 such that the tip thereof is at a position rearward of the tip of the solid body 11 by the width of the fixing portion of the fishing line guide 5-1. Thus, the installation range of the fiber reinforced resin layer 12 is limited by providing the fiber reinforced resin layer 12 in a position that does not overlap with the fishing line guide 5-1 and the fishing line guide 5-2 in the longitudinal axis AX direction of the solid body 11. Thus, the housing 1 can be reduced in weight. In one embodiment, the fiber reinforced resin layer 12 may be provided so that the tip thereof overlaps with the fishing line guide 5-1. The fiber reinforced resin layer 12 may be provided such that its tip is covered with the attachment portion of the fishing line guide 5-1. Thereby, the fishing line guide 5-1 and the fiber reinforced resin layer 12 can be connected seamlessly. In one Embodiment, the fiber reinforced resin layer 12 may be provided so that the rear end may overlap with the attachment part of the fishing line guide 5-2. The fishing line guide 5-2 and the fiber reinforced resin layer 12 can be seamlessly connected. When the tip of the fiber reinforced resin layer 12 is not covered with the attachment portion of the fishing line guide 5-1, the strength and rigidity change rapidly before and after the tip in the longitudinal axis AX direction. By covering the tip of the fiber reinforced resin layer 12 with the attachment portion of the fishing line guide 5-1, the change in strength and rigidity before and after the tip can be moderated. Similarly, by covering the rear end of the fiber reinforced resin layer 12 with the attachment portion of the fishing line guide 5-2, changes in strength and rigidity before and after the rear end can be moderated.

  A method for manufacturing the casing 1 will be described. When manufacturing the casing 1, first, the solid body 11 is prepared. In one embodiment, the solid body 11 is obtained by molding a fiber reinforced resin obtained by impregnating a reinforced fiber such as carbon fiber with a synthetic resin into a tapered rod shape. The solid body 11 is not limited to those specified in the present specification, and can be manufactured using various known materials and manufacturing methods.

  Then, the sheet body used as the fiber reinforced resin layer 12 is prepared. In one embodiment, the sheet body is a prepreg sheet in which liquid crystal polyester fibers are impregnated with a synthetic resin (matrix resin). The sheet body is cut into a predetermined shape, and the cut sheet body is wound around the solid body 11 at a predetermined position in the longitudinal axis A direction. The number of windings (number of plies) of the sheet body is adjusted as appropriate. Next, the fiber reinforced resin layer 12 is formed by curing the matrix resin of the sheet body wound around the solid body 11. When the matrix resin is a thermosetting resin, the matrix resin is cured by heating the prepreg sheet wound around the solid body 11. Thus, the housing 1 in which the fiber reinforced resin layer 12 is formed on the solid body 11 is obtained. Since the liquid crystalline polyester fiber and the unsaturated polyester are excellent in adhesion, when the solid body 11 contains the unsaturated polyester, the fiber reinforced resin layer 12 is wound around the solid body 11 with good adhesion. Can do.

  In one embodiment, the tensile elastic modulus measured according to JIS K 7161 of the liquid crystal polyester fiber contained in the prepreg sheet to be the fiber reinforced resin layer 12 is 500 to 1100 cN / dtex.

  In one embodiment, the tensile breaking strength measured based on JIS K 7161 of the liquid crystal polyester fiber contained in the prepreg sheet to be the fiber reinforced resin layer 12 is 20 to 33 cN / dtex.

  The tensile modulus of carbon fiber is generally about 230 to 324 GPa (1310 to 1810 cN / dtex). Moreover, the bending elastic modulus of the prepreg sheet containing carbon fibers as reinforcing fibers is usually about 120 to 220 GPa. For this reason, the casing 1 in which the fiber reinforced resin layer 12 containing liquid crystal polyester fibers is used has higher flexibility than a casing in which a reinforcing layer made of a prepreg sheet containing carbon fibers as reinforcing fibers is formed. It is done.

  In one embodiment, the prepreg sheet used as the fiber reinforced resin layer 12 is a knitted sheet in which liquid crystal polyester fibers are knitted in the triaxial direction. For example, the prepreg sheet used as the fiber reinforced resin layer 12 includes a first fiber extending in the first direction, a second fiber extending in the second direction, and a third fiber extending in the third direction. Have. Each of the first fiber, the second fiber, and the third fiber is a fiber bundle composed of a large number of single fibers. When the prepreg sheet is wound around the solid body 11, the first fibers may be stretched in a first direction orthogonal to the longitudinal axis A, and the second fibers are in relation to the longitudinal axis A. The third fiber may be stretched in a second direction inclined by a predetermined angle, and the third fiber may be stretched in a third direction inclined by a predetermined angle with respect to the longitudinal axis A. The angle that the second direction makes with the longitudinal axis A is, for example, 45 °, and the angle that the second direction makes with the longitudinal axis A is 45 ° in the direction opposite to the second direction. The angle formed by the second direction and the third direction with the longitudinal axis A is appropriately changed.

  A plurality of test pieces were prepared as follows, and each of the test pieces was subjected to a winding test to verify the strength during use.

  FIG. 4 schematically shows the structure 20 serving as a test piece. This structural body 20 corresponds to a portion in front of the reel seat 3 in the above-described rod body 1 of the fishing rod R1. As shown in the figure, the structure 20 as a test piece includes a solid body 21, fishing line guides 15-1 to 15-4 provided on the outer peripheral surface of the solid body 21, a fishing line guide 15-1, and an outside fishing line 15-. 2 and a fiber reinforced resin layer 22 wound around the solid body 21.

  The structure 20 was created as follows. A solid body 21 was prepared by drawing a round bar made of fiber reinforced resin impregnated with unsaturated polyester into carbon fiber by pultrusion and then tapering it by centerless processing or the like. The solid body 21 thus obtained had an overall length L3 of 466 mm and a tip diameter of 0.8 mm. Moreover, the solid body 21 had a tapered shape in which the outer diameter decreased as it approached the tip, and the taper was 3/1000.

  Next, fishing line guides 15-1 to 15-4 were attached to predetermined positions on the outer peripheral surface of the solid body 21, respectively. The fishing line guide 15-1 was attached to the tip of the solid body 21, and the fishing line guide 15-2 was attached to a position at a distance L 2 (100 mm) from the tip of the solid body 21.

  Next, in a region between the fishing line guide 15-1 and the outside of the fishing line 15-2, a prepreg sheet in which liquid crystal polyester fiber is impregnated with an epoxy resin is wound on the solid body 21 by 1.0 to 1.1 ply. . The tensile elastic modulus measured according to JIS K 7161 of the liquid crystal polyester fiber contained in this prepreg sheet is 500 to 1100 cN / dtex, and the tensile strength at break measured according to JIS K 7161 is 20 -33 cN / dtex. Next, the fiber reinforced resin layer 22 was formed by heating the prepreg sheet wound around the solid body 21 to solidify the epoxy resin. The fiber reinforced resin layer 22 was extended from the rear position by L1 (20 mm) from the front end of the solid body 21 to the rear position by L2 (100 mm) from the front end of the solid body 21. That is, the length of the fiber reinforced resin layer 22 in the longitudinal direction of the solid body 21 was 80 mm. The structure 20 used as a test piece was obtained as mentioned above.

  Moreover, the structure which abbreviate | omitted the fiber reinforced resin layer 22 from said structure 20 was created as a comparative example. The manufacturing method of this comparative example is the same as the manufacturing method of the structure 20 except that the fiber reinforced resin layer 22 is not formed.

  The entrainment amount and entrainment breaking load were measured by the entrainment test apparatus 30 schematically shown in FIG. The test apparatus 30 includes a fishing line 31 and a winder 32 that winds up the fishing line 31. The winder 32 includes a measuring device that measures the winding amount of the fishing line 31 and a torque measuring device that measures a winding torque for winding the fishing line. One end of the fishing line 31 is tied to a fishing line guide 15-1 provided at the tip of the structure 20, guided by the fishing line guides 15-2 to 15-4, and the other end is connected to the winder 32. .

  At the start of the test, the structure 20 is placed on a table. At this time, since the tensile force from the fishing line 31 does not act on the structure 20, the structure 20 takes the extended posture shown by a two-dot chain line in FIG. When the winder 32 is operated, the fishing line 31 is wound around the winder 32, so that the structure 20 bends toward the winder 32 as shown by a solid line in FIG. When the deflection of the structure 20 is increased, the structure 20 is broken between the fishing line guide 15-1 and the fishing line guide 15-2. The winding amount of the fishing line 31 at the time of destruction and the winding torque at the time of destruction were measured. Further, with respect to the sample of the above comparative example, the winding amount of the fishing line 31 at the time of breaking and the winding torque at the time of breaking were measured by the same method.

  The measurement results are shown in FIGS. FIG. 6 shows the measurement result (N = 5) of the winding amount of the fishing line 31 until the breakage, and FIG. 7 shows the measurement result (N = 5) of the winding torque at the breakage.

  From the graph of FIG. 6, the structure 20 in which the fiber reinforced resin layer 22 is provided on the solid body 21 can be wound with a fishing line that can be wound up to break than the structure without the fiber reinforced resin layer 22. It can be seen that the amount taken is large.

  From the graph of FIG. 7, it can be seen that the structure 20 in which the fiber reinforced resin layer 22 is provided on the solid body 21 has a higher winding torque at the time of breakage than the structure without the fiber reinforced resin layer 22. .

  From this measurement result, the liquid crystal polyester whose tensile elastic modulus measured according to JIS K 7161 is 500 to 1100 cN / dtex and whose tensile strength at break measured according to JIS K 7161 is 20 to 33 cN / dtex. It turned out that the structure which provided the fiber reinforced resin layer which consists of a prepreg sheet | seat containing a fiber in a solid body is hard to break compared with the structure which does not have this fiber reinforced resin layer.

  Next, a torsion test was performed on the structure 20, which is a test piece, and Comparative Example 1 and Comparative Example 2. Comparative Example 1 is a structure in which the fiber reinforced resin layer 22 is omitted from the structure 20. The manufacturing method of Comparative Example 1 is the same as the manufacturing method of the structure 20 except that the fiber reinforced resin layer 22 is not formed. Comparative Example 2 was prepared by winding a prepreg sheet in which a Kevlar fiber was impregnated with an epoxy resin around a solid body 21 and heating the prepreg sheet wound around the solid body 21 to solidify the epoxy resin. That is, the comparative example 2 is different from the structure 20 in that the reinforcing fiber of the fiber reinforced resin layer wound around the solid body 21 is a Kevlar fiber, and the other points are the same as the structure 20. It is. However, the fishing line guides 15-1 to 15-4 were not provided in the structure 20 for torsion test, Comparative Example 1 and Comparative Example 2.

  The torsion test uses an autograph made by Shimadzu Corporation, supporting the tip of the structure 20 as a test piece and a position 100 mm behind the tip (support distance 100 mm) at a twisting speed of 7.2 ° / sec. The torsional moment was applied to the structure 20 and the torsional torque was measured. For Comparative Example 1 and Comparative Example 2, the torsional moment was applied in the same manner, and the torsional torque was measured. For each of the structure 20, Comparative Example 1, and Comparative Example 2, a graph was created with the torsion angle on the horizontal axis and the torsion torque on the vertical axis.

  The measurement results are shown in FIGS. FIG. 8 shows the maximum torsion torque measured by the above test, and FIG. 9 shows the initial gradient of the graph with the torsion angle measured by the above test on the horizontal axis and the torsion torque on the vertical axis.

  From this measurement result, the liquid crystal polyester whose tensile elastic modulus measured according to JIS K 7161 is 500 to 1100 cN / dtex and whose tensile strength at break measured according to JIS K 7161 is 20 to 33 cN / dtex. It was found that the torsional rigidity and the torsional strength were superior to a structure in which a fiber reinforced resin layer made of a prepreg sheet containing fibers was provided on a solid body and a structure without such a fiber reinforced resin layer.

  Further, from the comparison between the comparative example 2 and the structure 20, when the liquid crystalline polyester fiber is used as the reinforcing fiber of the fiber reinforced resin layer wound around the solid body, the torsional rigidity is higher than when the Kevlar fiber is used. It was confirmed that Kevlar fiber has a tensile modulus similar to that of liquid crystal polyester fiber, but is inferior in adhesion to the matrix resin as compared with liquid crystal polyester fiber, and thus easily peels off from the solid body. It is considered that there is a case where superior torsional rigidity is not obtained as compared with the case where it is used.

  The dimensions, materials, and arrangement of each component described in this specification are not limited to those explicitly described in the embodiments, and each component may be included in the scope of the present invention. Can be modified to have different dimensions, materials, and arrangements. In addition, components that are not explicitly described in the present specification can be added to the described embodiments, or some of the components described in the embodiments can be omitted.

R Fishing rod 1 Rod body 11 Solid body 12 Fiber reinforced resin layer

Claims (4)

A fishing rod with a frame,
The housing is
A core extending in the longitudinal axis direction;
A fiber reinforced resin layer wound around the core;
With
The fiber reinforced resin layer is composed of a prepreg sheet containing liquid crystal polyester fibers,
The tensile elastic modulus of the liquid crystal polyester fiber measured according to JIS K 7161 is 500 to 1100 cN / dtex,
The tensile breaking strength measured according to JIS K 7161 of the liquid crystal polyester fiber is 20 to 33 cN / dtex.
fishing rod. The fiber reinforced resin layer is a sheet in which the liquid crystal polyester fiber is knitted in a triaxial direction.
The fishing rod according to claim 1. The liquid crystal polyester fiber includes a first fiber extending in a circumferential direction around the longitudinal axis, a second fiber extending at a predetermined angle with respect to the longitudinal axis direction, and the longitudinal axis direction. A third fiber extending at a predetermined angle,
The fishing rod according to claim 1 or claim 2. A first fishing line guide provided at the tip of the housing;
A second fishing line guide provided behind the front end of the housing;
Further comprising
The fiber reinforced resin layer is wound around the core between the first fishing line guide and the second fishing line guide.
The fishing rod according to any one of claims 1 to 3.

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