Fishing rod

Abstract

To increase design freedom of a fishing rod.SOLUTION: A fishing rod comprises a rod body 1, where the rod body 1 includes a fiber-reinforced resin layer 2 containing reinforcing fibers and a fiber-free resin layer 3 not containing reinforcing fibers. The fiber-free resin layer 3 is provided radially inward from the fiber-reinforced resin layer 2 or radially outward from the fiber-reinforced resin layer 2. The fiber-reinforced resin layer 2 includes a plurality of vertical layers 13 in which the reinforcing fibers are disposed along the axial direction of the rod body 1, and horizontal layers 10 and 12 respectively provided radially inward and radially outward from the plurality of vertical layers 13 and in which the reinforcing fibers are inclined with respect to the axial direction of the rod body 1. The fiber-free resin layer 3 is provided between the plurality of vertical layers 13.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to fishing rods, and more particularly to the layer structure of the rod body. [Background technology]

[0002] Typically, the body of a fishing rod is formed by winding prepreg around a mandrel and then heating and baking it. Prepreg is a sheet-like material made of reinforcing fibers, such as carbon fiber, impregnated with a matrix resin. The bending rigidity of the rod body is primarily determined by the elastic modulus of the reinforcing fibers. However, existing prepregs are limited in variety, and prepregs must be selected from these limited varieties depending on the application. This limits the design freedom for the bending rigidity of the rod body. Furthermore, the weight of the rod body is significantly affected by the number of reinforcing fibers. Increasing the number of reinforcing fibers used increases bending rigidity, but also increases weight. Fishing rods require various bending rigidity and weight settings depending on the application, but it is not easy to arbitrarily set and adjust these two factors.

[0003] Patent Document 1 below describes that a resin reservoir is formed between the inner and outer layers of the intermediate layer, where a larger amount of synthetic resin is contained than in the inner and outer layers. It also describes that a region with a higher synthetic resin content is formed within the outer layer. However, Patent Document 1 describes that both the inner and outer layers are formed by winding prepregs, in which reinforcing fibers are impregnated with a synthetic resin matrix resin, around a mandrel. Therefore, the problem of limited design freedom for bending rigidity, as described above, remains unresolved. Furthermore, fibers are present in the resin reservoirs and regions with a high synthetic resin content shown in the drawings of Patent Document 1. Therefore, it is believed that the resin reservoirs and regions with a high synthetic resin content were also formed by winding existing prepregs, and the problem of limited design freedom remains unresolved.

[0004] Furthermore, Patent Document 2 below describes the use of a special prepreg in which a fiber-reinforced resin layer or a resin layer without reinforcing fibers is laminated to metal fiber paper. Because it uses a special material called metal fiber paper, there are many limitations. Furthermore, it describes that metal fiber paper is a porous material with numerous pores, and that the resin in the fiber-reinforced resin layer or resin layer penetrates and integrates into the pores of the metal fiber paper. Therefore, in the sintered fishing rod body, it is believed that the resin in the prepreg stage before sintering penetrates into the pores of the metal fiber paper or migrates to other fiber-reinforced resin layers. In other words, the bending rigidity of the sintered fishing rod body is determined by the metal fiber paper integrated with the resin and the reinforcing fibers integrated with the resin. Therefore, it is not easy to design a fishing rod with desired characteristics, such as bending rigidity and weight, and there are many design limitations. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-155888 [Patent Document 2] Japanese Patent Application Publication No. 5-68452 Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to increase the degree of freedom in designing a fishing rod. [Means for solving the problem]

[0007] A fishing rod according to a first aspect of the present invention comprises a rod body. The rod body has a fiber-reinforced resin layer and a fiber-free resin layer. The fiber-reinforced resin layer contains reinforcing fibers. The fiber-free resin layer does not contain reinforcing fibers.

[0008] According to this configuration, a fiber-reinforced resin layer and a fiber-free resin layer are provided on the rod body. For example, the bending rigidity of the rod body is determined primarily by the bending rigidity of the fiber-reinforced resin layer, which in turn is determined by the modulus of elasticity (elastic coefficient) and second moment of area of ​​the fiber-reinforced resin layer. The second moment of area is greatly influenced by the radial position of the rod body where the fiber-reinforced resin layer is provided. Because the fiber-reinforced resin layer contains many reinforcing fibers, it is heavier than a fiber-free resin layer that does not contain reinforcing fibers. Therefore, by arranging both the fiber-reinforced resin layer and the fiber-free resin layer, the bending rigidity and weight of the rod body can be easily set.

[0009] In a fishing rod of a second aspect according to the first aspect, the fiberless resin layer has a stiffness adjustment layer. The stiffness adjustment layer adjusts the stiffness of the rod body. With this configuration, the bending stiffness, among various properties of the rod body, can be easily set.

[0010] In a fishing rod having a third aspect according to the first or second aspect, the fiberless resin layer has a weight adjustment layer. The weight adjustment layer adjusts the weight of the rod body. With this configuration, the weight, among other properties of the rod body, can be easily set.

[0011] In a fishing rod having a fourth aspect according to any one of the first to third aspects, the fiberless resin layer has a resin sheet layer. With this configuration, the thickness of the fiberless resin layer can be easily set.

[0012] In a fishing rod having a fifth aspect according to any one of the first to fourth aspects, the fiber-free resin layer is provided radially inward of the fiber-reinforced resin layer. With this configuration, since the fiber-reinforced resin layer is located radially outward of the fiber-free resin layer, it is possible to easily ensure high bending rigidity while suppressing weight increase by using a limited number of reinforcing fibers.

[0013] In a fishing rod having a sixth side face that is one of the first to fourth side faces, the fiber-free resin layer is provided radially outward of the fiber-reinforced resin layer. This configuration can prevent excessive bending rigidity while ensuring a predetermined weight.

[0014] In a fishing rod of a seventh aspect according to the sixth aspect, the rod body further has a paint layer on its outer circumferential surface. The fiberless resin layer is provided between the paint layer and the fiber-reinforced resin layer. The heated and baked outer circumferential surface of the rod body is polished before the painting process. In the polishing process, the fiberless resin layer is provided radially outside the fiber-reinforced resin layer, so the reinforcing fibers of the fiber-reinforced resin layer are not exposed to the outer circumferential surface, and therefore the reinforcing fibers are not scraped off and damaged during the polishing process. The reinforcing fibers on the outer circumferential surface have a significant impact on strength. Because the reinforcing fibers on the outer circumferential surface are covered and protected by the fiberless resin layer, a decrease in the strength of the rod body caused by damage to the reinforcing fibers can be suppressed. Furthermore, by providing the fiberless resin layer radially inside the paint layer, the fiberless resin layer also functions as a base for the paint, giving the paint a sense of depth and dimension.

[0015] In a fishing rod of an eighth aspect according to the sixth or seventh aspect, the rod main body has a first rod body and a second rod body. The first rod body includes a connecting end portion. The connecting end portion of the first rod body is detachably connected to the second rod body radially inward. A fiberless resin layer is provided on the outer peripheral surface of the connecting end portion of the first rod body. With this configuration, since a fiberless resin layer is provided on the outer peripheral surface of the connecting end portion, the required outer diameter of the connecting end portion can be more easily ensured than when it is ensured by a painting process.

[0016] In a fishing rod of a ninth aspect according to any one of the first to eighth aspects, the fiber-reinforced resin layer has a plurality of vertical layers and horizontal layers. The reinforcing fibers of the vertical layers are aligned along the axial direction of the rod body. The horizontal layers are provided radially inward and radially outward of the vertical layers. The reinforcing fibers of the horizontal layers are inclined with respect to the axial direction of the rod body. A fiber-free resin layer is provided between the vertical layers. With this configuration, the bending rigidity of the rod body can be easily adjusted by providing a fiber-free resin layer between the vertical layers.

[0017] In a fishing rod of a tenth aspect according to any one of the first to ninth aspects, the thickness of the fiber-free resin layer in the radial direction of the rod body is greater than the diameter of the reinforcing fibers. Note that, when multiple fiber-free resin layers are provided, the thickness of the fiber-free resin layer is the thickness of one layer (single layer). With this configuration, since the thickness of the fiber-free resin layer is greater than the diameter of the reinforcing fibers, the properties of the rod body, such as the bending rigidity and weight, can be easily adjusted. [Effects of the Invention]

[0018] As described above, since the rod body is provided with a fiber-reinforced resin layer and a fiber-free resin layer, the properties of the rod body such as bending rigidity and weight can be easily adjusted using the fiber-reinforced resin layer and the fiber-free resin layer, and design freedom can be easily increased. [Brief explanation of the drawings]

[0019] [Figure 1] 1(a) and 1(b) are cross-sectional views showing an outline of a fishing rod of the present invention. [Figure 2] 1 is a cross-sectional view of a rod body of a fishing rod according to a first embodiment of the present invention. [Figure 3] Cross-sectional view of the main layer of the rod body. [Figure 4] Schematic diagram showing the manufacturing process of the rod body. [Figure 5] Cross-sectional view of the main layer of the rod body. [Figure 6] Schematic diagram showing the manufacturing process of the rod body. [Figure 7] Cross-sectional view of the main layer of the rod body. [Figure 8] Schematic diagram showing the manufacturing process of the rod body. [Figure 9] FIG. 4 is a cross-sectional view of a rod body of a fishing rod according to a second embodiment of the present invention. [Figure 10] Schematic diagram showing the manufacturing process of the rod body. [Figure 11] Cross section AA of Figure 9. [Figure 12] 10(a) and 10(b) are cross-sectional views of the main part of the rod body of a fishing rod according to a third embodiment of the present invention. [Figure 13] Enlarged view of part B in Figure 12(a). [Figure 14] Schematic diagram showing the manufacturing process of the rod body. [Figure 15] FIG. 10 is a cross-sectional view of a fishing rod body according to a fourth embodiment of the present invention. [Figure 16] Schematic diagram showing the manufacturing process of the rod body. [Figure 17] Schematic diagram showing the manufacturing process of the rod body. [Figure 18] FIG. 1 is a cross-sectional view showing an outline of a conventional fishing rod. DETAILED DESCRIPTION OF THE INVENTION

[0020] First, an overview of the present invention will be described. Fig. 1 shows an overview of the fishing rod of the present invention. In Fig. 1, the layer structure of the rod body 1 of the fishing rod is shown in a simplified form. For comparison, Fig. 18 shows an overview of the rod body 1 of a conventional fishing rod, which is also shown in a simplified form.

[0021] The bending rigidity of the rod body 1 is determined mainly by the modulus of elasticity of the fiber reinforced resin layer 2 containing reinforcing fibers, and the second moment of area of ​​the fiber reinforced resin layer 2. The reinforcing fibers are mainly along the axial direction of the rod body 1. The modulus of elasticity of the fiber reinforced resin layer 2 is determined mainly by the modulus of elasticity and density of the reinforcing fibers. The reinforcing fibers may be various types such as carbon fiber or glass fiber. The second moment of area of ​​the fiber reinforced resin layer 2 is determined by the diameter (inner diameter and outer diameter) of the fiber reinforced resin layer 2.

[0022] The rod body 1 of a conventional fishing rod is composed only of a fiber-reinforced resin layer 2. The rod body 1 of the present invention shown in FIG. 1 includes a fiber-reinforced resin layer 2 and a fiber-free resin layer 3 that does not contain reinforcing fibers. The fiber-reinforced resin layer 2 is laminated radially outward of the fiber-free resin layer 3. The conventional rod body 1 shown in FIG. 18 and the rod body 1 of the present invention shown in FIG. 1 have the same inner and outer diameters, the same reinforcing fibers, and the same number of reinforcing fibers. The weight of the rod body 1 is determined primarily by the number of reinforcing fibers. Therefore, the weights of the rod bodies 1 are the same. As a result, if the number of reinforcing fibers is the same between the conventional rod and the present invention, the density of the reinforcing fibers in the conventional fiber-reinforced resin layer 2 will be relatively small, while the density of the reinforcing fibers in the fiber-reinforced resin layer 2 of the present invention will be relatively large. Furthermore, as the density of the reinforcing fibers in the fiber-reinforced resin layer 2 increases, the elastic modulus of the fiber-reinforced resin layer 2 increases.

[0023] In Fig. 1(a), a fiber-reinforced resin layer 2 with a relatively high density of reinforcing fibers is provided radially outside the fiber-free resin layer 3. The diameter of the fiber-reinforced resin layer 2 in Fig. 1(a) is larger than the diameter of the fiber-reinforced resin layer 2 in Fig. 18. Therefore, the bending rigidity of the rod body 1 in Fig. 1(a) is greater than the bending rigidity of the rod body 1 in Fig. 18.

[0024] Conversely, if the fiber-reinforced resin layer 2 is provided radially inward of the fiber-free resin layer 3 as shown in FIG. 1(b), the diameter of the fiber-reinforced resin layer 2 will be smaller than the diameter of the fiber-reinforced resin layer 2 in FIG. 1(a). Therefore, the bending rigidity of the rod body 1 in FIG. 1(a) will be smaller than the bending rigidity of the rod body 1 in FIG. 1(a). Note that the bending rigidity of the rod body 1 in FIG. 1(b) may be smaller than the bending rigidity of the rod body 1 in FIG. 18, or conversely, it may be larger. Note that if the fiber density in FIG. 1 is the same as that in FIG. 18, the number of reinforcing fibers will be smaller, the weight of the rod body 1 will be lighter, and the bending rigidity will be lower.

[0025] In this way, by using a layer structure in which the fiber reinforced resin layer 2 and the fiberless resin layer 3 are laminated, it is possible to easily set the bending rigidity and weight of the rod body 1. A detailed explanation will be given below using specific examples.

[0026] First Embodiment FIG. 2 shows a cross section of the rod body 1 of a fishing rod according to a first embodiment of the present invention. In the following description, the axial direction of the rod body 1 may be simply referred to as the front-to-rear direction. The rod body 1 comprises, in order from the radially inner side, a first horizontal layer 10, a main layer 11, and a second horizontal layer 12. The main layer 11 is provided radially between the first horizontal layer 10 and the second horizontal layer 12. The main layer 11 is a layer for setting the bending rigidity of the rod body 1. An example of the details of the main layer 11 is shown in FIG. 3. The main layer 11 comprises one vertical layer 13, which is a fiber-reinforced resin layer 2 containing reinforcing fibers, and one fiber-free resin layer 3 which does not contain reinforcing fibers.

[0027] The vertical layers 13 are formed from prepreg. Therefore, the vertical layers 13 are prepreg layers. The vertical layers 13 are laminated radially outside the fiberless resin layer 3. The vertical layers 13 constitute the radially outer region of the main layer 11. The reinforcing fibers are aligned along the axial direction of the rod body 1. The fiber diameter of the reinforcing fibers is, for example, 1 μm to 20 μm. The thickness (radial dimension) of each vertical layer 13 is larger than the fiber diameter of the reinforcing fibers, for example, 10 μm to 300 μm.

[0028] The fiberless resin layer 3 constitutes the radially inner region of the main layer 11. The fiberless resin layer 3 functions as a rigidity adjustment layer that adjusts the bending rigidity of the main layer 11, and also functions as a weight adjustment layer that adjusts the weight of the rod body 1. The fiberless resin layer 3 is formed from a resin sheet, as will be described later. Therefore, the fiberless resin layer 3 is a resin sheet layer. The thickness of each fiberless resin layer 3 is greater than the fiber diameter of the reinforcing fibers of the vertical layers 13. The thickness of each fiberless resin layer 3 is, for example, 10 μm or more and less than 100 μm. The bending rigidity and weight of the rod body 1 can be adjusted by varying the thickness of the vertical layers 13 and the thickness of the fiberless resin layer 3.

[0029] The first horizontal layer 10 is provided radially inward of the main layer 11. The first horizontal layer 10 is the innermost layer of the rod body 1. The inner peripheral surface of the first horizontal layer 10 is the inner peripheral surface of the rod body 1. The first horizontal layer 10 is a fiber-reinforced resin layer 2 having reinforcing fibers, and is a prepreg layer. The reinforcing fibers of the first horizontal layer 10 are, for example, aligned along the circumferential direction of the rod body 1. The reinforcing fibers of the first horizontal layer 10 may be inclined with respect to the axial direction of the rod body 1, or may be aligned along a direction inclined with respect to the axial direction and circumferential direction of the rod body 1. The first horizontal layer 10 may include reinforcing fibers inclined with respect to the axial direction of the rod body 1, or may include reinforcing fibers aligned along the axial direction of the rod body 1.

[0030] The second horizontal layer 12 is provided radially outside the main layer 11. The second horizontal layer 12 is the outer layer of the rod body 1. The second horizontal layer 12 is a fiber-reinforced resin layer 2 having reinforcing fibers, and is a prepreg layer. The reinforcing fibers of the second horizontal layer 12 are the same as the reinforcing fibers of the first horizontal layer 10 and are arranged, for example, along the circumferential direction of the rod body 1. The reinforcing fibers of the second horizontal layer 12 are the same as the reinforcing fibers of the first horizontal layer 10. The specifications of the reinforcing fibers of the first horizontal layer 10 and the second horizontal layer 12 may be the same or different from each other. As shown by the two-dot chain line in Figure 2, various paint layers 14 are formed radially outside the second horizontal layer 12. The paint layer 14 may be a single layer or multiple layers.

[0031] FIG. 4 shows a schematic overview of the manufacturing process for the fishing rod body 1. A first barbed prepreg 21 constituting the first horizontal layer 10, a resin sheet 22 constituting the fiberless resin layer 3 of the main layer 11, a regular-grain prepreg 23 constituting the vertical layer 13 of the main layer 11, and a second barbed prepreg 24 constituting the second horizontal layer 12 are wound around a mandrel 20 in this order. After the molding tape is wound, the fishing rod body 1 is formed by heating and baking. A coating layer 14 is then formed on the outer surface of the fishing rod body 1 by painting. The reinforcing fibers in the first barbed prepreg 21 and the second barbed prepreg 24 are aligned in the circumferential direction of the fishing rod body 1. The reinforcing fibers in the regular-grain prepreg 23 are aligned in the axial direction of the fishing rod body 1. The matrix resin for each prepreg is a thermosetting resin, such as epoxy resin. The shape, size, and number of the prepregs and resin sheets 22 may be varied. The first horizontal layer 10 and the second horizontal layer 12 may be formed of, for example, a tape-shaped prepreg.

[0032] The resin sheet 22 is a sheet made of resin that does not contain reinforcing fibers. The resin that constitutes the resin sheet 22 is preferably a thermosetting resin and may be composed of a single resin, particularly an epoxy resin. The resin sheet 22 is in a semi-cured state. Therefore, when the resin sheet 22 is wound around the mandrel 20 together with the prepregs and then heated and baked, the resin sheet 22 hardens before the matrix resins of the other prepregs. This makes it difficult for the resin of the resin sheet 22 to migrate to the other prepregs, making it easy to form a fiber-free resin layer 3 that does not contain reinforcing fibers. The thickness of the resin sheet 22 is, for example, several tens of μm, i.e., 10 μm or more and less than 100 μm.

[0033] As described above, by configuring the main layer 11 of the rod body 1 from the vertical layer 13, which is a fiber-reinforced resin layer 2 containing reinforcing fibers along the front-to-rear direction, and the fiber-free resin layer 3 provided radially inward of the vertical layer 13, it is possible to set a high bending rigidity for the main layer 11 while suppressing the number of reinforcing fibers in the main layer 11. Therefore, it is possible to increase the bending rigidity of the rod body 1 without significantly increasing the weight of the rod body 1.

[0034] As shown in Figure 5, the layer structure of the main layer 11 of the rod body 1 may be reversed from that shown in Figure 3. That is, in the main layer 11, a fiberless resin layer 3 may be provided radially outside the vertical layer 13. The manufacturing process for the rod body 1 in this case is outlined in Figure 6. By configuring the radially outer region of the main layer 11 with a fiberless resin layer 3 in this way, the bending rigidity of the rod body 1 can be reduced, making it easy to manufacture a flexible fishing rod. A flexible fishing rod that is flexible is suitable, for example, for fishing using light tackle.

[0035] 3 and 5, the vertical layers 13 and the fiberless resin layer 3 constituting the main layer 11 are each shown as single layers, but at least one of the vertical layers 13 and the fiberless resin layer 3 may be multiple layers. For example, as shown in FIG. 7, the main layer 11 may have multiple vertical layers 13 and multiple fiberless resin layers 3. The number of each layer is arbitrary, but in this embodiment, as an example, three vertical layers 13 and two fiberless resin layers 3 are provided. The fiberless resin layers 3 are each provided between two radially adjacent vertical layers 13. The manufacturing process for the rod body 1 in this case is outlined in FIG. 8. For example, the main layer 11 may have two vertical layers 13 and one fiberless resin layer 3, or conversely, the main layer 11 may have one vertical layer 13 and two fiberless resin layers 3. In this way, the number of vertical layers 13 and the number of fiberless resin layers 3 in the main layer 11 can be variously changed. By varying the number of vertical layers 13 and fiberless resin layers 3 in the main layer 11, the bending rigidity can be finely adjusted.

[0036] <Second embodiment> Fig. 9 shows the layer structure of a rod body 1 of a fishing rod according to a second embodiment of the present invention. Fig. 10 shows an overview of the manufacturing process of the rod body 1. In this embodiment, a fiberless resin layer 3 is provided radially outward of the second horizontal layer 12. That is, the rod body 1 comprises, in order from the radially inner side, a first horizontal layer 10, a main layer 11, a second horizontal layer 12, and a fiberless resin layer 3. A paint layer 14 is provided radially outward of the fiberless resin layer 3. The main layer 11 is made up of, for example, one or more vertical layers 13, but the fiberless resin layer 3 may also be provided in the main layer 11.

[0037] Figure 11 shows a cross section of the main part of Figure 9 taken along the front-to-rear direction. Because the fiberless resin layer 3 is provided between the paint layer 14 and the second horizontal layer 12, the reinforcing fibers 12a in the second horizontal layer 12 are covered and protected by the fiberless resin layer 3. After the rod body 1 is heated and baked, the outer surface of the rod body 1 is polished and painted. Typically, the paint layer 14 is provided directly on the radially outer side of the second horizontal layer 12. However, in this case, the reinforcing fibers 12a in the second horizontal layer 12 are scraped and damaged during the polishing process. In contrast, if the second horizontal layer 12 is covered by the fiberless resin layer 3, the reinforcing fibers 12a in the second horizontal layer 12 are not scraped during the polishing process. Therefore, there is no need to design the second horizontal layer 12 thicker than necessary to account for scraping and removal. Furthermore, because the transparent or translucent fiberless resin layer 3 is provided radially inward of the paint layer 14, the fiberless resin layer 3 also functions as a base for painting. This gives the paint color depth and dimension, and adds a sense of luxury.

[0038] <Third embodiment> FIG. 12 shows the main parts of a rod body 1 of a fishing rod according to a third embodiment of the present invention. The rod body 1 in this embodiment comprises a first rod body 31 and a second rod body 32. The first rod body 31 and the second rod body 32 are separated from each other in the front and rear as shown in FIG. 12(a), and then connected to each other in the front and rear as shown in FIG. 12(b). In other words, the first rod body 31 and the second rod body 32 are connected so as to be separable from each other. The first rod body 31 is provided on the tip side (front side) of the second rod body 32. The rear end of the first rod body 31 is inserted into and connected to the front end of the second rod body 32.

[0039] The first rod body 31 has a first connecting end 33 at its rear end, and the second rod body 32 has a second connecting end 34 at its front end. The first connecting end 33 and the second connecting end 34 are connected to each other. Specifically, the first connecting end 33 is inserted radially inside the second connecting end 34, and the outer circumferential surface of the first connecting end 33 comes into close contact with the inner circumferential surface of the second connecting end 34, and the first rod body 31 and the second rod body 32 are connected by the frictional resistance therebetween. The first rod body 31 is connected to the second rod body 32 by a so-called parallel joint.

[0040] A fiberless resin layer 3 is provided on the first connecting end 33. The fiberless resin layer 3 forms the outermost layer of the first connecting end 33 and forms the outer peripheral surface of the first connecting end 33. A padding portion 35 is formed on the outer peripheral surface of the first connecting end 33, and the padding portion 35 is formed by the fiberless resin layer 3. Note that in FIG. 12, a step is provided at the front end of the padding portion 35, but the padding portion 35 may be gradually thinner toward the front, as indicated by the two-dot chain line.

[0041] FIG. 13 shows an enlarged view of portion B in FIG. 12(a). FIG. 13 is a longitudinal cross-sectional view of the outer periphery of the first connecting end 33 cut along the front-rear direction. The layer structure of the first rod body 31 is the same as that of the second embodiment described above, and a fiberless resin layer 3 is provided radially outside the second horizontal layer 12. The fiberless resin layer 3 is provided over the entire length of the first connecting end 33. The fiberless resin layer 3 is not provided over the entire length of the first rod body 31, but only over a portion of the entire length, and in this embodiment, it is provided only on the first connecting end 33. FIG. 14 shows an overview of the manufacturing process for the first rod body 31. The length of the resin sheet 22 in the front-rear direction is shorter than that of the other prepregs. The resin sheet 22 is arranged only on the rear end of the mandrel 20. The thickness of the fiberless resin layer 3 can be easily set by adjusting the thickness and number of windings of the resin sheet 22, and the outer diameter of the padding portion 35 can also be easily set.

[0042] In this embodiment, the fiberless resin layer 3 is provided on the outer peripheral surface of the first connecting end 33, but the fiberless resin layer 3 may also be provided on the inner peripheral surface of the second connecting end 34, or a fiberless resin layer 3 may be provided on both. Also, while the first connecting end 33 is connected to the radially inner side of the second connecting end 34 in the above embodiment, the second connecting end 34 may be connected to the radially inner side of the first connecting end 33, forming a so-called reverse butt joint. In this case, it is preferable that the fiberless resin layer 3 be provided on the outer peripheral surface of the second connecting end 34.

[0043] <Fourth embodiment> FIG. 15 shows the layer structure of the rod body 1 of a fishing rod according to a fourth embodiment of the present invention. FIG. 16 shows an overview of the manufacturing process for the rod body 1. In this embodiment, the fiberless resin layer 3 is provided radially inward of the first horizontal layer 10. That is, the rod body 1 comprises, from the radially innermost layer, the fiberless resin layer 3, the first horizontal layer 10, the main layer 11, and the second horizontal layer 12. The fiberless resin layer 3 constitutes the innermost layer of the rod body 1 and forms the inner circumferential surface of the rod body 1. The main layer 11 may be composed of, for example, one or more vertical layers 13, but the fiberless resin layer 3 may also be provided on the main layer 11. By providing the fiberless resin layer 3 as the innermost layer of the rod body 1, the main layer 11 of the rod body 1 is positioned radially outward by the thickness of the fiberless resin layer 3. That is, the diameter of the main layer 11 of the rod body 1 can be increased. This facilitates increasing the bending rigidity of the rod body 1. 16, the resin sheet 22 is wound as the first sheet around the mandrel 20. Therefore, the diameter of the mandrel 20 can be increased in appearance, and the versatility of the mandrel 20 can be improved.

[0044] Furthermore, the fiberless resin layer 3 provided as the innermost layer of the rod body 1 may be provided over the entire length of the rod body 1, or it may be provided only in a portion of the entire length of the rod body 1. For example, it may be provided only in the front end, only in the rear end, or only in the middle portion of the entire length of the rod body 1. For example, FIG. 17 shows an outline of the manufacturing process for the rod body 1 when the fiberless resin layer 3 is provided only in the middle portion of the entire length of the rod body 1. When the resin sheet 22 is wound around the middle portion of the mandrel 20 in this manner, the middle portion of the mandrel 20 is effectively locally enlarged in diameter. If the outer diameter of the middle portion of the mandrel 20 itself were locally enlarged, it would be necessary to perform a force-removal process when pulling the mandrel 20 out of the rod body 1 after heating and baking. In contrast, when the resin sheet 22 is wound around the mandrel 20 locally as shown in FIG. 17, force-removal after heating and baking is not required, and the mandrel 20 can be smoothly pulled out. The locally wound resin sheet 22 can easily cause the prepreg wound radially outward to locally bulge and deform radially outward, making it easier to make the middle portion of the main layer 11 meander radially outward, for example.

[0045] In the manufacturing process of the rod body 1 in the above embodiment, the resin sheet 22 is wound separately from the other prepregs, but it may be wound around the mandrel 20 after being bonded to other prepregs in advance. [Explanation of symbols]

[0046] 1 Rod body 2 Fiber-reinforced resin layer 3 Fiber-free resin layer 10 First horizontal layer 11 Main layer 12 Second horizontal layer 12a reinforced fiber 13 Vertical Layer 14 Paint layer 20 mandrels 21 First reverse grain prepreg 22 Resin sheet 23 Straight prepreg 24 Second reverse grain prepreg 31 First rod body 32 Second rod body 33 First connection end 34 Second connection end 35 Meat platter

Claims

1. A fishing rod having a rod body, The rod body includes a fiber reinforced resin layer containing reinforced fibers, A fishing rod having a fiber-free resin layer that does not contain the reinforcing fibers.

2. The fiber-free resin layer is 2. The fishing rod according to claim 1, further comprising a stiffness adjusting layer for adjusting the stiffness of the rod body.

3. The fiber-free resin layer is 3. The fishing rod according to claim 1, further comprising a weight adjustment layer for adjusting the weight of the rod body.

4. The fishing rod of claim 1 , wherein the fiberless resin layer comprises a resin sheet layer.

5. The fishing rod according to claim 1 , wherein the fiber-free resin layer is provided radially inward of the fiber-reinforced resin layer.

6. The fishing rod according to claim 1 , wherein the fiber-free resin layer is provided radially outward of the fiber-reinforced resin layer.

7. 7. The fishing rod according to claim 6, wherein the rod body further has a paint layer on its outer circumferential surface, and the fiber-free resin layer is provided between the paint layer and the fiber-reinforced resin layer.

8. 7. The fishing rod according to claim 6, wherein the rod main body comprises a first rod body including a connecting end, and a second rod body to which the connecting end of the first rod body is detachably connected radially inward, and the fiberless resin layer is provided on an outer peripheral surface of the connecting end of the first rod body.

9. The fiber reinforced resin layer has a plurality of vertical layers in which the reinforcing fibers are aligned along the axial direction of the rod body, and horizontal layers provided radially inside and outside the vertical layers, and in which the reinforcing fibers are inclined with respect to the axial direction of the rod body, 2. The fishing rod according to claim 1, wherein the fiberless resin layer is provided between the plurality of vertical layers.

10. 2. The fishing rod according to claim 1, wherein the thickness of the fiberless resin layer in the radial direction of the rod body is greater than the diameter of the reinforcing fibers.

Images