Fishing rod

Abstract

The technical problem is to improve the design freedom of a fishing rod. A fishing rod is provided with a rod main body (1). The rod main body (1) is provided with a fiber-reinforced resin layer (2) containing reinforced fibers and a non-fiber resin layer (3) not containing reinforced fibers. The non-fiber resin layer (3) is arranged on the inner side of the fiber-reinforced resin layer (2) in the radial direction or on the outer side of the fiber-reinforced resin layer (2) in the radial direction; the fiber-reinforced resin layer (2) has a plurality of longitudinal layers (13) in which reinforcing fibers are along the axial direction of the rod body (1), and transverse layers (10, 12) which are respectively arranged on the radial inner side and the radial outer side of the plurality of longitudinal layers (13) and in which the reinforcing fibers are inclined relative to the axial direction of the rod body (1). The fiber-free resin layer (3) is provided between the vertical layers (13).

Description

Technical Field

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

[0002] Generally speaking, the rod body of a fishing rod is formed by winding a prepreg material (プリプレグ) on a mandrel and heating and firing it. The prepreg material is a sheet-like body in which a matrix resin is impregnated with reinforcing fibers such as carbon fibers. The bending rigidity of the rod body is mainly determined by the elastic modulus of the reinforcing fibers. However, the types of existing prepreg materials are limited, and prepreg materials are selected and used from a limited number of types according to the application. Therefore, the design freedom of the bending rigidity of the rod body is relatively low. In addition, the number of reinforcing fibers is greatly related to the weight of the rod body. If the number of reinforcing fibers used is increased, the bending rigidity can be increased, but the weight also increases. The fishing rod needs to set various bending rigidity and weight according to its application, but it is not easy to arbitrarily set and adjust these two factors of bending rigidity and weight.

[0003] In addition, the following patent document 1 describes that a resin reservoir is formed between the inner layer and the outer layer of the intermediate layer, in which more synthetic resin is provided than in the inner layer and the outer layer. In addition, it is described that an area with a high synthetic resin ratio is formed in the outer layer. However, it is described that both the inner layer and the outer layer in the patent document 1 are formed by winding a prepreg material in which a synthetic resin as a matrix resin is impregnated in the reinforcing fibers onto a mandrel. Therefore, the above-mentioned problem of low design freedom for bending rigidity is not solved. Furthermore, fibers are also present in the resin reservoir and the area with a high synthetic resin ratio described in the figure of patent document 1. Therefore, it can be considered that the part set as the resin reservoir and the area with a high synthetic resin ratio is formed by winding the existing prepreg material, and the problem of low design freedom is still not solved.

[0004] In addition, Patent Document 2 below describes the use of a special prepreg material formed by laminating fiber-reinforced resin layers or resin layers without reinforcing fibers in metal fiber paper. Due to the use of a special raw material such as metal fiber paper, there are many restrictions. Furthermore, it is described that the metal fiber paper is a porous body formed with many pores, and the fiber-reinforced resin layer or the resin of the resin layer penetrates into the pores of the metal fiber paper and becomes integrated. Therefore, it can be imagined that in the rod body after being heated and fired, the resin in the prepreg material stage before being heated and fired penetrates into the pores of the metal fiber paper or moves to other fiber-reinforced resin layers. In other words, the bending rigidity of the rod body after being heated and fired 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 the characteristics of the fishing rod such as bending rigidity and weight to the desired characteristics, and there are many design restrictions.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2011-155888

[0008] Patent Document 2: Japanese Patent Application Laid-Open No. 5-68452 Summary of the Invention

[0009] Technical problem to be solved by the invention

[0010] The technical problem of the present invention is to increase the design freedom of fishing rods.

[0011] Means used to solve technical problems

[0012] A fishing rod according to a first aspect of the present invention includes a rod body. The rod body includes a fiber-reinforced resin layer and a fiber-free resin layer. The fiber-reinforced resin layer includes reinforcing fibers. The fiber-free resin layer does not include reinforcing fibers.

[0013] According to this structure, 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 mainly determined by the bending rigidity of the fiber-reinforced resin layer, and the bending rigidity of the fiber-reinforced resin layer is determined by the elastic modulus (elastic coefficient) and the secondary moment of section of the fiber-reinforced resin layer. The radial position of the rod body where the fiber-reinforced resin layer is provided has a great influence on the secondary moment of section. Since the fiber-reinforced resin layer contains many reinforcing fibers, it is heavier than the fiber-free resin layer that does not contain reinforcing fibers. Therefore, by configuring 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.

[0014] In the fishing rod of the second technical solution according to the first technical solution, the fiber-free resin layer includes a rigidity adjustment layer. The rigidity adjustment layer adjusts the rigidity of the rod body. With this structure, the bending rigidity among various characteristics of the rod body can be easily set.

[0015] In the fishing rod of the third technical solution according to the first or second technical solution, the fiber-free resin layer includes a weight adjustment layer. The weight adjustment layer adjusts the weight of the rod body. This structure makes it possible to easily set the weight of the rod body according to various characteristics.

[0016] In the fishing rod according to a fourth aspect of the present invention, which conforms to any one of the first to third aspects, the fiber-free resin layer includes a resin sheet layer. This configuration allows the thickness of the fiber-free resin layer to be easily set.

[0017] In the fishing rod according to the fifth aspect of the present invention, which conforms to any one of the first to fourth aspects, the fiber-free resin layer is disposed radially inwardly of the fiber-reinforced resin layer. With this configuration, since the fiber-reinforced resin layer is disposed radially outwardly of the fiber-free resin layer, it is possible to easily maintain high flexural rigidity while suppressing an increase in weight by using a limited number of reinforcing fibers.

[0018] In the fishing rod according to claim 6 in accordance with any one of claims 1 to 4, the fiber-free resin layer is provided radially outward of the fiber-reinforced resin layer. This configuration prevents the bending rigidity from becoming excessive while ensuring a predetermined weight.

[0019] In the fishing rod of the seventh technical solution according to the sixth technical solution, the rod body further has a coating layer on the outer peripheral surface. The fiber-free resin layer is provided between the coating layer and the fiber-reinforced resin layer. The outer peripheral surface of the rod body after being heated and fired is grinded before the coating process. In this grinding process, since the fiber-free resin layer is provided on the radially outer side of the fiber-reinforced resin layer, the reinforcing fibers of the fiber-reinforced resin layer are not exposed on the outer peripheral surface, and therefore, the reinforcing fibers are not cut and damaged due to the grinding process. The reinforcing fibers on the outer peripheral surface are the portion that has a greater impact on the strength. Since the reinforcing fibers on the outer peripheral surface are covered and protected by the fiber-free resin layer, the decrease in the strength of the rod body caused by the damage of the reinforcing fibers can be suppressed. Furthermore, by providing the fiber-free resin layer on the radially inner side of the coating layer, the fiber-free resin layer also functions as a base for the coating, and can make the coating present a sense of depth and depth.

[0020] In the fishing rod of the eighth technical solution according to the sixth technical solution or the seventh technical solution, the rod body includes a first rod body and a second rod body. The first rod body includes a connecting end portion. The second rod body is connected to the connecting end portion of the first rod body on the radially inner side so as to be freely attachable and detachable. A fiber-free resin layer is provided on the outer peripheral surface of the connecting end portion of the first rod body. According to this structure, since the fiber-free resin layer is provided on the outer peripheral surface of the connecting end portion, it is possible to more easily ensure the required outer diameter of the connecting end portion than in the case of ensuring it by means of a coating process.

[0021] In the fishing rod of the ninth technical solution according to any one of the first to eighth technical solutions, the fiber-reinforced resin layer has a plurality of longitudinal layers and a transverse layer. The reinforcing fibers of the plurality of longitudinal layers are along the axial direction of the rod body. The transverse layers are respectively arranged on the radially inner side and the radially outer side of the plurality of longitudinal layers. The reinforcing fibers of the transverse layers are inclined relative to the axial direction of the rod body. The fiber-free resin layer is arranged between the plurality of longitudinal layers. According to this structure, by arranging the fiber-free resin layer between the plurality of longitudinal layers, the bending rigidity of the rod body can be easily adjusted.

[0022] In the fishing rod of the tenth technical solution according to any one of the first to ninth technical solutions, 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. Furthermore, when multiple fiber-free resin layers are provided, the thickness of the fiber-free resin layer is the thickness of each layer (single layer). With this structure, since the thickness of the fiber-free resin layer is greater than the diameter of the reinforcing fibers, the characteristics of the rod body, such as bending rigidity and weight, can be easily adjusted.

[0023] Effects of the Invention

[0024] As described above, since the fiber-reinforced resin layer and the fiber-free resin layer are provided on the rod body, the bending rigidity, weight and other characteristics of the rod body can be easily adjusted with the help of the fiber-reinforced resin layer and the fiber-free resin layer, which can easily improve the design freedom. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 (a) and Figure 1 (b) is a cross-sectional view schematically showing the fishing rod of the present invention.

[0026] Figure 2 It is a cross-sectional view of a rod body of a fishing rod according to a first embodiment of the present invention.

[0027] Figure 3 It is a cross-sectional view of the main layer of the rod body.

[0028] Figure 4 This is a schematic diagram showing the manufacturing process of the rod body.

[0029] Figure 5 It is a cross-sectional view of the main layer of the rod body.

[0030] Figure 6 This is a schematic diagram showing the manufacturing process of the rod body.

[0031] Figure 7 It is a cross-sectional view of the main layer of the rod body.

[0032] Figure 8 This is a schematic diagram showing the manufacturing process of the rod body.

[0033] Figure 9 It is a cross-sectional view of a rod body of a fishing rod according to a second embodiment of the present invention.

[0034] Figure 10 This is a schematic diagram showing the manufacturing process of the rod body.

[0035] Figure 11 yes Figure 9 A-A cross-sectional view.

[0036] Figure 12 (a) and Figure 12 (b) is a cross-sectional view of a main portion of a rod body of a fishing rod according to a third embodiment of the present invention.

[0037] Figure 13 yes Figure 12 Enlarged view of part B of (a).

[0038] Figure 14 This is a schematic diagram showing the manufacturing process of the rod body.

[0039] Figure 15 It is a cross-sectional view of a rod body of a fishing rod according to a fourth embodiment of the present invention.

[0040] Figure 16 This is a schematic diagram showing the manufacturing process of the rod body.

[0041] Figure 17 This is a schematic diagram showing the manufacturing process of the rod body.

[0042] Figure 18 It is a cross-sectional view schematically showing a conventional fishing rod. DETAILED DESCRIPTION

[0043] First, the outline of the present invention is described. Figure 1 The outline of the fishing rod of the present invention is shown in FIG. Figure 1 The layer structure of the rod body 1 of the fishing rod is simplified and shown in FIG. Figure 18 1 shows an outline of a conventional fishing rod body 1, which is also simplified.

[0044] The bending rigidity of the rod body 1 is mainly determined by the elastic modulus of the fiber-reinforced resin layer 2 having reinforcing fibers and the secondary moment of cross-section of the fiber-reinforced resin layer 2. The reinforcing fibers are mainly along the axial direction of the rod body 1. The elastic modulus of the fiber-reinforced resin layer 2 is mainly determined by the elastic modulus and density of the reinforcing fibers. In addition, the reinforcing fibers can be various fibers such as carbon fibers and glass fibers. The secondary moment of cross-section of the fiber-reinforced resin layer 2 is determined by the diameter (inner diameter and outer diameter) of the fiber-reinforced resin layer 2.

[0045] The rod body 1 of a conventional fishing rod is composed only of a fiber-reinforced resin layer 2 . Figure 1 The rod body 1 of the present invention shown in the figure includes a fiber-reinforced resin layer 2 and a fiber-free resin layer 3 having no reinforcing fibers. The fiber-reinforced resin layer 2 is laminated on the outside of the fiber-free resin layer 3 in the radial direction. Figure 18 The conventional rod body 1 and Figure 1The rod body 1 of the present invention shown has the same inner diameter and outer diameter, the same reinforcing fibers, and the same number of reinforcing fibers. The weight of the rod body 1 is mainly determined by the number of reinforcing fibers. Therefore, the weight of the rod body 1 is made the same. As a result, if the number of reinforcing fibers is the same in the past and in the present invention, the density of the reinforcing fibers in the fiber-reinforced resin layer 2 in the past becomes relatively smaller, and the density of the reinforcing fibers in the fiber-reinforced resin layer 2 in the present invention becomes relatively larger. Moreover, if 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.

[0046] exist Figure 1 In (a), the fiber-reinforced resin layer 2 having a relatively high density of reinforcing fibers is provided radially outside the fiber-free resin layer 3. Figure 1 (a) The diameter ratio of the fiber reinforced resin layer 2 Figure 18 The diameter of the fiber reinforced resin layer 2 is large. Figure 1 The bending rigidity of the rod body 1 of (a) becomes greater than Figure 18 The rod body 1 has great bending rigidity.

[0047] On the contrary, if Figure 1 (b) If the fiber-reinforced resin layer 2 is arranged radially inward of the fiber-free resin layer 3, the diameter of the fiber-reinforced resin layer 2 will be Figure 1 The diameter of the fiber-reinforced resin layer 2 of (a) becomes smaller. Figure 1 (a) The bending rigidity of the rod body 1 is compared Figure 1 (a) The bending rigidity of the rod body 1 becomes smaller. Figure 1 (b) The bending rigidity of the rod body 1 is relatively Figure 18 The bending rigidity of the rod body 1 may decrease or increase. Figure 1 In the example, if it is set to Figure 18 With the same fiber density, the number of reinforcing fibers decreases, the weight of the rod body 1 decreases, and the bending rigidity decreases.

[0048] By adopting a layer structure in which the fiber-reinforced resin layer 2 and the fiber-free resin layer 3 are stacked, it is possible to easily set the bending rigidity and weight of the rod body 1. This will be described in detail below using specific examples.

[0049] <First embodiment>

[0050] exist Figure 2, a cross section of the rod body 1 of the fishing rod according to the first embodiment of the present invention is shown. In the following description, the axial direction of the rod body 1 may be simply referred to as the front-rear direction. The rod body 1 comprises a first transverse layer 10, a main layer 11, and a second transverse layer 12 in order from the radial inside. The main layer 11 is provided between the first transverse layer 10 and the second transverse layer 12 in the radial direction. The main layer 11 is a layer for setting the bending rigidity of the rod body 1. Figure 3 Detailed examples of the main layer 11 are shown in FIG. The main layer 11 includes one vertical layer 13 which is a fiber-reinforced resin layer 2 having reinforcing fibers, and one fiber-free resin layer 3 which does not have reinforcing fibers.

[0051] The longitudinal layer 13 is formed of a prepreg material. Therefore, the longitudinal layer 13 is a prepreg material layer. The longitudinal layer 13 is stacked on the radial outside of the fiber-free resin layer 3. The longitudinal layer 13 constitutes the radial outside area in the main layer 11. The reinforcing fiber is along the axial direction of the rod body 1. The fiber diameter of the reinforcing fiber is, for example, 1 μm to 20 μm. The thickness (radial dimension) of each layer of the longitudinal layer 13 is larger than the fiber diameter of the reinforcing fiber, for example, 10 μm or more and 300 μm.

[0052] The fiber-free resin layer 3 constitutes the radially inner region of the main layer 11. The fiber-free resin layer 3 functions as a rigidity adjustment layer for adjusting the bending rigidity of the main layer 11, and also functions as a weight adjustment layer for adjusting the weight of the rod body 1. The fiber-free resin layer 3 is formed of a resin sheet as described later. Therefore, the fiber-free resin layer 3 is a resin sheet layer. The thickness of each layer of the fiber-free resin layer 3 is larger than the fiber diameter of the reinforcing fiber of the longitudinal layer 13. The thickness of each layer of the fiber-free resin layer 3 is, for example, not less than 10 μm and less than 100 μm. In addition, by variously setting the thickness of the longitudinal layer 13 and the thickness of the fiber-free resin layer 3, the bending rigidity and weight of the rod body 1 can be adjusted.

[0053] The first transverse layer 10 is arranged radially inward of the main layer 11. The first transverse layer 10 is the innermost layer of the rod body 1. The inner circumferential surface of the first transverse layer 10 is the inner circumferential surface of the rod body 1. The first transverse layer 10 is a fiber-reinforced resin layer 2 having reinforcing fibers, and is a pre-impregnated material layer. The reinforcing fibers of the first transverse layer 10 are, for example, along the circumferential direction of the rod body 1. The reinforcing fibers of the first transverse layer 10 only need to be inclined relative to the axial direction of the rod body 1, or they may be along a direction inclined relative to the axial direction and the circumferential direction of the rod body 1. The first transverse layer 10 only needs to include reinforcing fibers inclined relative to the axial direction of the rod body 1, or it may include reinforcing fibers along the axial direction of the rod body 1.

[0054] The second transverse layer 12 is arranged radially outside the main layer 11. The second transverse layer 12 is the outer layer of the rod body 1. The second transverse layer 12 is a fiber-reinforced resin layer 2 having reinforcing fibers, and is a pre-impregnated material layer. The reinforcing fibers of the second transverse layer 12 are the same as the reinforcing fibers of the first transverse layer 10, for example, along the circumference of the rod body 1. The reinforcing fibers of the second transverse layer 12 are the same as the reinforcing fibers of the first transverse layer 10. The specifications of the reinforcing fibers of the first transverse layer 10 and the specifications of the reinforcing fibers of the second transverse layer 12 may be the same as or different from each other. In addition, as in Figure 2 As indicated by the two-dot chain line in FIG, various coating layers 14 are formed radially outside the second lateral layer 12. The coating layer 14 may be a single layer or a plurality of layers.

[0055] exist Figure 4 The figure schematically shows an overview of the manufacturing process of the rod body 1. The first reverse-grain prepreg 21 constituting the first transverse layer 10, the resin sheet 22 constituting the fiber-free resin layer 3 of the main layer 11, the along-grain prepreg 23 constituting the longitudinal layer 13 of the main layer 11, and the second reverse-grain prepreg 24 constituting the second transverse layer 12 are wound around the mandrel 20 in sequence. Next, after the forming tape is wound, it is heated and fired to form the rod body 1. Then, the coating layer 14 is formed on the outer peripheral surface of the rod body 1 by coating. The reinforcing fibers in the first reverse-grain prepreg 21 and the second reverse-grain prepreg 24 are along the circumferential direction of the rod body 1. The reinforcing fibers in the along-grain prepreg 23 are along the axial direction of the rod body 1. In addition, as the matrix resin of each prepreg, a thermosetting resin such as epoxy resin is used. In addition, the shape, size, number of sheets, etc. of the prepreg and the resin sheet 22 can be set in various ways. The first lateral layer 10 and the second lateral layer 12 may be formed of, for example, a tape-shaped prepreg material.

[0056] The resin sheet 22 is a sheet made of resin without reinforcing fibers. The resin constituting the resin sheet 22 is preferably a thermosetting resin and can be composed of a single resin, and epoxy resin is particularly preferred. The resin sheet 22 is in a semi-hardened state. Therefore, when the resin sheet 22 is heated and fired after being wound on the mandrel 20 together with the prepreg material, the resin sheet 22 hardens earlier than the matrix resin of other prepreg materials. Therefore, the resin of the resin sheet 22 is difficult to transfer to other prepreg materials, and a fiber-free resin layer 3 that does not contain reinforcing fibers can be easily formed. In addition, the thickness of the resin sheet 22 is, for example, several tens of μm, that is, greater than 10 μm and less than 100 μm.

[0057] As described above, by forming the main layer 11 of the rod body 1 with a fiber-reinforced resin layer 2, i.e., a longitudinal layer 13, containing reinforcing fibers extending in the front-to-back direction, and a fiber-free resin layer 3 disposed radially inward of the longitudinal layer 13, the bending rigidity of the main layer 11 can be increased while suppressing the number of reinforcing fibers in the main layer 11. Therefore, the bending rigidity of the rod body 1 can be increased without significantly increasing the weight of the rod body 1.

[0058] In addition, you can also Figure 5 In this way, the layer structure of the main layer 11 of the rod body 1 is set to Figure 3 That is, in the main layer 11, a fiber-free resin layer 3 may be provided radially outside the longitudinal layer 13. Figure 6 The following diagram outlines the manufacturing process for the rod body 1 in this case. By making the radially outer region of the main layer 11 from a fiber-free resin layer 3, the bending rigidity of the rod body 1 can be reduced, making it easy to manufacture a flexible and easily bendable fishing rod. A flexible and easily bendable fishing rod is suitable for fishing with lighter traps, for example.

[0059] In addition, Figure 3 and Figure 5 In the embodiment, the longitudinal layer 13 and the fiber-free resin layer 3 constituting the main layer 11 are each a single layer, but at least one of the longitudinal layer 13 and the fiber-free resin layer 3 may be a multilayer. Figure 7 Thus, the main layer 11 includes a plurality of longitudinal layers 13 and a plurality of fiber-free resin layers 3. The number of layers is arbitrary, but in this embodiment, three longitudinal layers 13 and two fiber-free resin layers 3 are provided as an example. The fiber-free resin layers 3 are provided between the longitudinal layers 13 adjacent to each other in the radial direction. Figure 8 The manufacturing process of the rod body 1 in this case is schematically shown in FIG. Alternatively, for example, two longitudinal layers 13 and one fiber-free resin layer 3 may be provided in the main layer 11, or conversely, one longitudinal layer 13 and two fiber-free resin layers 3 may be provided in the main layer 11. In this way, the number of longitudinal layers 13 and the number of fiber-free resin layers 3 in the main layer 11 can be varied in various ways. By varying the number of longitudinal layers 13 and fiber-free resin layers 3 in the main layer 11, the bending rigidity can be finely adjusted.

[0060] <Second embodiment>

[0061] exist Figure 9 1 shows the layer structure of the rod body 1 of the fishing rod according to the second embodiment of the present invention. Figure 10, an outline of the manufacturing process of the rod body 1 is shown. In the present embodiment, a fiber-free resin layer 3 is provided on the radially outer side of the second transverse layer 12. That is, the rod body 1 comprises, from the radially inner side, a first transverse layer 10, a main layer 11, a second transverse layer 12 and a fiber-free resin layer 3. Furthermore, a coating layer 14 is provided on the radially outer side of the fiber-free resin layer 3. The main layer 11 is composed of, for example, one or more longitudinal layers 13, but a fiber-free resin layer 3 may also be provided on the main layer 11.

[0062] exist Figure 11 China stated that it will Figure 9 The cross section of the main part of the rod when it is cut along the front-to-back direction. Since the fiber-free resin layer 3 is provided between the coating layer 14 and the second transverse layer 12, the reinforcing fibers 12a in the second transverse layer 12 are covered and protected by the fiber-free resin layer 3. After the rod body 1 is heated and fired, the outer peripheral surface of the rod body 1 is polished and painted. Generally, the coating layer 14 is provided directly on the radially outer side of the second transverse layer 12, but in this case, the reinforcing fibers 12a of the second transverse layer 12 are cut and damaged during the polishing process. In contrast, if the second transverse layer 12 is covered with the fiber-free resin layer 3, the reinforcing fibers 12a of the second transverse layer 12 are no longer cut during the polishing process. Therefore, there is no need to design the second transverse layer 12 to be thicker than necessary to account for being cut and removed. In addition, since a transparent or translucent fiber-free resin layer 3 is provided on the radially inner side of the coating layer 14, the fiber-free resin layer 3 also functions as a base for painting. Therefore, the color tone of the coating can be expressed in shades and depth, and the sense of luxury is enhanced.

[0063] <Third embodiment>

[0064] exist Figure 12 1 shows the main part of the rod body 1 of the fishing rod according to the third embodiment of the present invention. The rod body 1 of this embodiment includes a first rod body 31 and a second rod body 32. The first rod body 31 and the second rod body 32 are arranged as follows. Figure 12 (a) The state of separation between the front and the back, such as Figure 12 (b) are connected to each other front and back. That is, 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 the front end of the second rod body 32 to connect.

[0065] 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 inward of the second connecting end 34, and the outer circumference of the first connecting end 33 is in close contact with the inner circumference of the second connecting end 34. The friction resistance between them connects the first rod body 31 and the second rod body 32. The first rod body 31 is connected to the second rod body 32 by a so-called relay method.

[0066] The fiber-free resin layer 3 is provided on the first connection end portion 33. The fiber-free resin layer 3 constitutes the outermost layer of the first connection end portion 33 and constitutes the outer peripheral surface of the first connection end portion 33. A raised portion 35 is formed on the outer peripheral surface of the first connection end portion 33. The raised portion 35 is formed of the fiber-free resin layer 3. Figure 12 In the embodiment, a step is provided at the front end portion of the raised portion 35 , but as indicated by a two-dot chain line, the raised portion 35 may be gradually thinner toward the front side.

[0067] exist Figure 13 Indicates Figure 12 Enlarged view of part B of (a). Figure 13 It is a longitudinal sectional view of the outer peripheral portion of the first connecting end portion 33 cut along the front-to-back direction. The layer structure of the first rod body 31 is, for example, the same as that of the second embodiment described above, and a fiber-free resin layer 3 is provided on the radially outer side of the second transverse layer 12. The fiber-free resin layer 3 is provided over the entire length of the first connecting end portion 33. The fiber-free resin layer 3 is not provided over the entire length of the first rod body 31, but is provided only at a portion of the entire length, and in this embodiment, is provided only at the first connecting end portion 33. In Figure 14 ] shows an overview of the manufacturing process of the first rod body 31. The length of the resin sheet 22 in the front-to-back direction is shorter than that of other prepreg materials. The resin sheet 22 is only arranged at the rear end of the mandrel 20. The thickness of the fiber-free resin layer 3 can be easily set according to the thickness of the resin sheet 22 and the number of windings, and the outer diameter of the protrusion 35 can be easily set.

[0068] In this embodiment, the fiber-free resin layer 3 is provided on the outer circumferential surface of the first connecting end portion 33. However, the fiber-free resin layer 3 may also be provided on the inner circumferential surface of the second connecting end portion 34, or on both. Furthermore, a configuration in which the first connecting end portion 33 is connected radially inwardly of the second connecting end portion 34 is also possible, or a so-called reverse-connected configuration in which the second connecting end portion 34 is connected radially inwardly of the first connecting end portion 33 is also possible. In this case, it is preferred that the fiber-free resin layer 3 be provided on the outer circumferential surface of the second connecting end portion 34.

[0069] <Fourth embodiment>

[0070] exist Figure 15 , a layer structure of the rod body 1 of the fishing rod according to the fourth embodiment of the present invention is shown. Figure 16 An overview of the manufacturing process of the rod body 1 is shown in FIG. In the present embodiment, the fiber-free resin layer 3 is provided on the radially inner side of the first transverse layer 10. That is, the rod body 1 comprises the fiber-free resin layer 3, the first transverse layer 10, the main layer 11 and the second transverse layer 12 in order from the radially inner side. The fiber-free resin layer 3 constitutes the innermost layer of the rod body 1 and constitutes the inner circumference of the rod body 1. The main layer 11 is composed of, for example, one or more longitudinal layers 13, but the fiber-free resin layer 3 may also be provided on the main layer 11. If the fiber-free resin layer 3 is provided in the innermost layer of the rod body 1 in this way, the main layer 11 of the rod body 1 is located radially outward only according to the thickness of the fiber-free resin layer 3. That is, the diameter of the main layer 11 of the rod body 1 can be increased. Therefore, the bending rigidity of the rod body 1 can be easily improved. In addition, as Figure 16 In this way, 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.

[0071] Furthermore, the fiber-free resin layer 3 provided in the innermost layer of the rod body 1 may be provided over the entire length of the rod body 1 or only in a portion of the entire length of the rod body 1. For example, it may be provided only at the front end portion of the entire length of the rod body 1, or only at the rear end portion, or only in the middle portion. Figure 17 The manufacturing process of the rod body 1 is schematically shown in the case where the fiber-free resin layer 3 is provided only in the middle portion of the entire length of the rod body 1. If the resin sheet 22 is wound around the middle portion of the mandrel 20 in the front-to-back direction, the middle portion of the mandrel 20 is hypothetically partially enlarged in diameter. If the outer diameter of the middle portion of the mandrel 20 itself is partially enlarged, it will be necessary to forcefully pull the mandrel 20 out of the rod body 1 after heating and firing. In contrast, in the case of Figure 17 When the resin sheet 22 is partially wound around the mandrel 20 in this manner, the mandrel 20 can be smoothly removed without requiring forceful removal after heating and firing. Furthermore, the partially wound resin sheet 22 can easily cause the prepreg material wound radially outward to be locally bulged and deformed radially outward. This makes it easier to cause the middle portion of the main layer 11 to meander radially outward, for example.

[0072] Furthermore, in the manufacturing process of the rod body 1 in the above embodiment, the resin sheet 22 is wound separately from other prepreg materials. However, the resin sheet 22 may be laminated with other prepreg materials in advance and then wound around the mandrel 20 .

[0073] Description of Reference Numerals

[0074] 1 rod body

[0075] 2 fiber-reinforced resin layers

[0076] 3. No fiber resin layer

[0077] 101st horizontal layer

[0078] 11 Main Floor

[0079] 12 2nd horizontal layer

[0080] 12a reinforced fiber

[0081] 13 vertical layers

[0082] 14 coating layer

[0083] 20 spindle

[0084] 21st reverse texture prepreg material

[0085] 22 resin sheets

[0086] 23. Pre-impregnated material with smooth texture

[0087] 24 2nd reverse texture prepreg material

[0088] 31 1st rod body

[0089] 32 2nd rod body

[0090] 33 1st connection end

[0091] 34 2nd connection end

[0092] 35 bulge

Claims

1. A fishing rod comprising a rod body, characterized in that: The aforementioned rod body has: a fiber-reinforced resin layer comprising reinforcing fibers; and The fiber-free resin layer does not contain the aforementioned reinforcing fibers.

2. The fishing rod according to claim 1, wherein The fiber-free resin layer includes a rigidity adjustment layer for adjusting the rigidity of the rod body.

3. The fishing rod according to claim 1 or 2, wherein: The fiber-free resin layer includes a weight adjustment layer for adjusting the weight of the rod body.

4. The fishing rod according to claim 1, wherein The fiber-free resin layer includes 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. The fishing rod according to claim 6, wherein The rod body further includes a coating layer on its outer peripheral surface, and the fiber-free resin layer is provided between the coating layer and the fiber-reinforced resin layer.

8. The fishing rod according to claim 6, wherein The rod body comprises a first rod body including a connecting end and a second rod body which is detachably connected to the connecting end of the first rod body on the radial inner side, and the fiber-free resin layer is provided on the outer peripheral surface of the connecting end of the first rod body.

9. The fishing rod according to claim 1, wherein The fiber-reinforced resin layer comprises a plurality of longitudinal layers of the reinforcing fibers along the axial direction of the rod body, and transverse layers of the reinforcing fibers, which are arranged radially inward and radially outward of the plurality of longitudinal layers and are inclined relative to the axial direction of the rod body. The fiber-free resin layer is provided between the plurality of vertical layers.

10. The fishing rod according to claim 1, wherein The thickness of the fiber-free resin layer in the radial direction of the rod body is larger than the diameter of the reinforcing fiber.

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