JP6030049B2 - fishing rod - Google Patents

Description

  The present invention relates to a fishing rod, and in particular, to a fishing rod having a feature at the tip.

  Generally, a fishing rod is constituted by winding a so-called prepreg in which reinforcing fibers are aligned in a specific direction and impregnated with a synthetic resin. Such a fishing rod is configured as a tubular body in order to reduce the weight, but the tip of the fishing rod is configured in a solid shape so that it is easy to bend and does not break even if it is greatly bent when caught by a fish. Things are sometimes used.

  Normally, a solid tip is impregnated with a synthetic resin in reinforcing fibers (carbon fiber, glass fiber, etc.) continuous from the base end to the tip end as disclosed in Patent Document 1 and Patent Document 2, for example. The so-called fiber-reinforced resin material is used, and these are mainly manufactured by a pultrusion method.

JP 54-80372 A JP-A-9-248103

  Since the above-mentioned known tip has a state in which reinforcing fibers are oriented from the base end to the tip end (continuous fiber solid body), the elongation is determined by the material of the reinforcing fibers to be selected. For example, in the carbon fiber and glass fiber as described above, the elongation is about 1.5 to 2.7% with respect to the entire length, and the fiber itself does not grow so much. For this reason, the elongation of the reinforcing fibers becomes wrinkles, the rigidity when bending acts is high, and there is a limit from the viewpoint of softness. In other words, the tip should be as soft and strong as possible (especially entrainment strength) so that it can detect and visually recognize the delicate fish hits. Depending on the fish, fishing species, etc., a soft one may be desired. In this case, if the continuous fiber solid body is soft, it may be possible to reduce the outer diameter. However, if it is too thin to make it soft, processing and assembly operations become difficult. In addition, such soft and high-strength characteristics of the tip may be obtained at a necessary degree in a required portion of the tip in order to realize various tips.

  The present invention has been made by paying attention to the above-described problems, and has an object to provide a fishing rod having a tip that can be obtained in a necessary degree at a required portion while having characteristics that are soft and difficult to break. And

  In order to achieve the above object, the present invention provides a fishing rod having a fiber reinforced resin tip, wherein the tip is a short fiber having an average fiber diameter of 3 μm to 15 μm and an average fiber length of 0.5 mm to 10 mm. It consists of a short fiber reinforced resin body formed by dispersing in a matrix resin material with a content of 3 to 50 wt%, and the short fiber reinforced resin body is formed by joining a plurality of portions having different characteristics from each other. Features.

  Since the tip of the fishing rod having the above-described configuration is composed of a short fiber reinforced resin body in which short fibers (short fibers having an average fiber diameter of 3 μm to 15 μm and an average fiber length of 0.5 mm to 10 mm) are dispersed in a matrix resin material, It can have properties that are soft and difficult to break. In particular, such a short fiber reinforced resin body is softer and more flexible when compared to a continuous fiber solid body in which reinforcing fibers are oriented from the proximal end to the distal end, making it easier to detect delicate fish hits and to be easily visible. Become. In this case, since the short fibers are dispersed in the matrix resin material, the amount of displacement until breakage (breaking) increases, and even if the outer diameter is increased to some extent, such an effect can be obtained. Therefore, it is easy to process and an assembly type fishing rod can be easily assembled.

  In addition, the tip of the fishing rod having the above-described configuration is formed by joining a plurality of portions having different characteristics to each other with the short fiber reinforced resin body. Various joining forms, such as joining together, thereby changing the degree of characteristics stepwise or continuously, for example, from the axial tip side to the base side or from the radially inner side to the radially outer side By forming, the characteristics which are soft and difficult to break can be obtained at the required degree at the required part of the tip, and various fishing rods can be realized.

  Here, as the different “characteristics” of the plurality of portions, the content (wt%) of short fibers in the matrix resin material (the amount of fibers blended in the resin, and hence the hardness), the elastic modulus of the short fibers, Examples of the resin (elastic modulus, elongation, thermal characteristics, etc.) can be given.

  ADVANTAGE OF THE INVENTION According to this invention, while having the characteristic which is soft and hard to damage, the fishing rod which has the tip which can obtain the characteristic by the required degree in a required site | part can be provided.

1 is an overall view of a fishing rod according to an embodiment of the present invention. The side view which shows the structure of the tip rod of the fishing rod shown in FIG. The figure which shows typically the state of the reinforced fiber (short fiber) contained in the short fiber reinforced resin body (solid substance) of a spikelet. The longitudinal cross-sectional view of a short fiber reinforced resin body (solid substance). (A)-(e) is a schematic diagram which shows the various joining forms of several parts from which the characteristic mutually differs of a short fiber reinforced resin body (solid substance). It is a figure explaining the method of manufacturing a spikelet, and is a figure which shows an example of a metal mold | die.

Hereinafter, an embodiment of a fishing rod according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is an overall view showing an example of a fishing rod according to the present invention. The fishing rod 1 of this embodiment is a joint type fishing rod with an outer guide, and includes a main rod 10, a plurality of middle rods (in this embodiment, two middle rods) 11a and 11b, and a tip rod. 12 is connected in a swing-out manner.

  As is well known, the main rod 10 and the middle rods 11a and 11b are configured as a fiber reinforced resin tubular body in which a synthetic resin such as an epoxy resin or a polyester resin is reinforced with a reinforcing fiber such as carbon fiber. . In the fishing rod 1 shown in the figure, a reel seat 50 is provided on the main rod 10, and an outer guide 55 and a top guide 56 for guiding a fishing line discharged from the reel 51 mounted on the reel seat 50 are spaced apart from each other by a predetermined interval. Although provided (a part of the guide may be a floating type), the fishing rod 1 may be configured such that such an outer guide is not provided. Moreover, although the drawing type fishing rod is shown in the figure, it may be a parallel-type or reverse-parallel type.

FIG. 2 shows a tip rod 12 of the fishing rod shown in FIG.
The tip heel 12 of the present embodiment is configured in a solid shape with a circular cross section as a whole, and is configured to be inserted into the middle heel 11b, and the tip heel 12 constitutes the tip (hereinafter, referred to as a tip). The ear tip is also called the tip). The tip 12 is a short fiber reinforced resin body 60 configured as a composite material in which short fibers serving as a reinforcing material are dispersed in a matrix resin (in the present embodiment, it is solid as described above. In the embodiment, the short fiber reinforced resin body is referred to as a solid body), and the solid body 60 is formed by joining a plurality of portions having different characteristics, in this embodiment, three portions 60A, 60B, and 60C. . In particular, in the present embodiment, the plurality of portions 60A, 60B, 60C having different characteristics are formed by being joined to each other in the axial direction of the tip 12. Such a solid body 60 is excellent in flexibility due to the configuration described later, and has the property of being difficult to break (not easily damaged) when displaced.

  In addition, the number of the joined parts of the solid body 60 is not particularly limited. What is necessary is just to join the required number part from which a characteristic mutually differs suitably according to a use. In addition, the solid body 60 is not particularly limited in a joining form (arrangement form) between a plurality of portions having different characteristics.

  In addition, although the pointed hook 12 shown to a figure is comprised by the cross-sectional circle shape and solid shape over the full length, the base end side may become a tubular body and the front end side may be comprised solid. That is, the tip side becomes a solid tip, and the base end side becomes a hollow ear holding tube, and the tip can be configured by connecting both together, and by configuring in this way, As a fishing rod, it is possible to improve the sensitivity of the short region of the tip of the tip rod.

  The solid body 60 (a plurality of portions 60A, 60B, 60C having different characteristics from each other) is formed by dispersing a large number of short fibers 22 serving as reinforcing materials in a matrix resin 20, as schematically shown in FIG. In this case, the matrix resin 20 is composed of a thermoplastic resin (for example, polyamide, polypropylene, polyphenylene sulfide, polyetherimide) or a thermosetting resin (for example, epoxy, phenol). Alternatively, a polyamide resin as a main component and other thermoplastic resins (polyester, polycarbonate, etc.) may be contained.

  The matrix resin 20 may contain other auxiliary materials (materials other than reinforcing materials). For example, a colorant such as a pigment exhibiting a color may be mixed to express the color of the tip 12 or the matrix resin may be foamed and mixed with microbubbles to reduce the weight. Alternatively, it is possible to increase the efficiency at the time of injection molding by adding a flow modifier, an antistatic agent, a release agent, an antioxidant and the like.

  For example, PAN-based or pitch-based carbon fibers or glass fibers can be used as the reinforced fibers (short fibers 22) dispersed in a large amount in the matrix resin 20 (that is, for example, carbon, glass, boron, aramid, etc.). ). The size of each short fiber 22 is not particularly limited, but it is preferable to use one having an average fiber diameter of 3 μm to 15 μm and an average fiber length of 0.5 mm to 10 mm.

  Here, the short fibers 22 dispersed in the matrix resin 20 are set in the above-described range because when the fiber diameter is smaller than 3 μm and the length is shorter than 0.5 mm, the tip has a predetermined elasticity (eye sensitivity is lower). In order to obtain good elasticity or strength), it is necessary to mix a large amount of fibers, which deteriorates the fluidity at the time of molding and tends not to disperse the short fibers uniformly in the axial direction. Because there is. Also, if the fiber diameter is larger than 15 μm and the length is longer than 10 mm, the fluidity at the time of molding deteriorates even if the fiber ratio provides a predetermined elasticity, and the short fibers are uniformly distributed in the axial direction. This is because it tends to be impossible.

  Moreover, content with respect to the matrix resin 20 of the short fiber 22 of an above-described magnitude | size is set to 3-50 wt%. This is because if the short fiber 22 has the above-mentioned size, if it is less than 3 wt%, sufficient strength cannot be obtained. Even if it exists, it is because the fluidity | liquidity at the time of shaping | molding worsens and there exists a tendency which cannot disperse | distribute a short fiber uniformly in an axial length direction. Moreover, even if the matter required for the tip (soft and flexible and maintain strength) is taken into consideration, such an effect is sufficiently exerted if the content of the short fiber is 50 wt% or less. Is possible.

  In addition, about the short fiber disperse | distributed in the matrix resin 20, all the short fibers do not need to exist in the above-mentioned range, and the thing of the magnitude | size which remove | deviates from this range may be included partially. That is, the average value of a large number of short fibers only needs to be within the above-described range, and some of the short fibers may be larger or smaller than the above-described range.

  Moreover, about content of the above-mentioned short fiber 22, it is not necessary to make it uniform over an axial length direction. For example, if the constitution is such that the content of the short fiber 22 increases continuously or stepwise as it moves to the proximal end side in the axial length direction, the tip end can be easily bent. Alternatively, if the content of the short fibers 22 is made uniform over the axial length direction and the same diameter is made over the axial length direction, the bending characteristics of the bending become uniform, but as shown in FIG. By forming the taper 12A on the surface so as to reduce the diameter, it is possible to have a configuration in which the amount of bending increases as it moves to the front side. Including a straight part, a part having a large diameter part, a part having a different taper ratio and a smaller diameter, and a stepped diameter part). Furthermore, in a structure with a small content of the short fibers 22 on the tip side, as shown in FIG. 2, it is possible to make the tip region easier to bend and form a sensitive structure by forming a taper on the surface. In this case, as a method of changing the content of the short fibers 22 along the axial length direction, for example, fiber reinforced resin materials having different fiber contents may be injected using a two-color molding machine.

  In addition, with respect to the solid body 60 composed of the composite material as described above, the short fibers 22 serving as the reinforcing material are often anisotropic in the radially inner side and are often oriented in the axial length direction on the radially outer peripheral side. It is preferable to be dispersed in the matrix resin material 20 so as to be. Specifically, as shown in the cross section of FIG. 4, when the short fiber is oriented in the axial length direction, the cross section becomes a substantially circular shape (see the short fiber 22 radially outward), but the short fiber is anisotropic. When in a state, the short fibers are cut obliquely when viewed in cross section, so that the tendency to become elliptical or oblong is strong (see the short fibers 22 ′ existing in the central region in the radial direction). That is, when the solid body 60 is in a state in which the short fibers in the outer peripheral region are oriented in the axial length direction, the bending rigidity can be improved efficiently, and the structure can be easily bent with a predetermined elastic force. become able to. Further, since the short fibers 22 existing in the central region have anisotropy, the torsional strength of the solid body 60 can be improved, and breakage and the like when a torsional stress acts can be effectively prevented. It becomes like this.

  Here, “the state of being oriented in the axial length direction on the outer peripheral side in the radial direction increases” means that the short fibers 22 in a state where a large number of them are dispersed in the synthetic resin when the tip is viewed in cross section (any position). It is possible to comprehend by comparing the ratio of the cross section of the circular shape. Specifically, when the diameter of the cross section at a position where the solid body 60 is D is a circular shape of the short fibers 22 existing in the outer peripheral region rather than a circle having a radius of (1/2) / D. If the ratio is larger than the ratio of the short fibers 22 included in the inner region of the circle in a circular shape, the short fibers 22 oriented in the axial length direction on the surface side as the solid body 60 It can be evaluated that a large number of are arranged, thereby obtaining desired bending rigidity and improving strength against torsion. In addition, about the orientation state of the short fiber 22 as shown in FIG. 4, it is realizable by the manufacturing method which is mentioned later.

  Here, the portions 60 </ b> A, 60 </ b> B, and 60 </ b> C having different characteristics constituting the solid body 60 are different in content (wt%) of the short fibers 22 in the matrix resin material 20, for example. Alternatively, the elastic moduli of the short fibers are different from each other. When the content (wt%) of the short fibers 22 in the matrix resin material 20 is different from each other, the first portion 60A located on the most distal side in the axial direction has a content of the short fibers 22 in the matrix resin material 20. For example, the third portion 60C that is set to 5 wt% and is located on the most proximal side in the axial direction has the content of the short fibers 22 in the matrix resin material 20 set to 20 wt%, for example, and the first portion 60A In the second portion 60B sandwiched between the third portion 60C, the content of the short fibers 22 in the matrix resin material 20 is set to 10 wt%, for example. On the other hand, when the elastic moduli of the short fibers 22 are different from each other, the first portion 60A positioned at the most distal end in the axial direction has a low elastic modulus, for example, and is a third portion positioned at the most proximal end in the axial direction. The elastic modulus of the portion 60C is set to, for example, medium, and the elastic modulus of the second portion 60B sandwiched between the first portion 60A and the third portion 60C is set to be high, for example.

  Such characteristics can be adjusted, for example, by changing the type of resin and fiber used, the fiber orientation, and the like. In addition, other characteristics include strength (elongation) and the like.

  FIG. 5 shows various joining forms of the plurality of portions 60A, 60B, 60C of the solid body 60 having different characteristics. 5A is a joining example of the present embodiment corresponding to FIG. 2, and as described above, the plurality of portions 60A, 60B, and 60C having different characteristics are mutually connected in the axial direction of the tip 12. It is joined. In this case, the joints between the portions 60A, 60B, and 60C are tapered. Specifically, the distal end portion 62 of the second portion 60B has a tapered outer surface 62a, while the proximal end portion 64 of the first portion 60A tapers toward the distal end side (the proximal end side). And a concave portion 65 having a tapered inner surface 64a, and the first end portion 62 of the second portion 60B is inserted into the concave portion 65 of the first portion 60A. The portion 60A and the second portion 60B are joined to each other.

  Similarly, the distal end portion 66 of the third portion 60C has a tapered outer surface 66a, while the proximal end portion 67 of the second portion 60B is tapered toward the distal end side (toward the proximal end side). The second portion 60B has a concave portion 69 having a tapered inner surface 67a and the tip portion 66 of the third portion 60C is inserted into the concave portion 69 of the second portion 60B. And the third portion 60C are joined to each other.

  Therefore, in such a bonding form, the degree of characteristics (for example, the content (wt%) of the short fibers 22 in the matrix resin material 20 described above or the elastic modulus of the short fibers 22) is based on the axial front end side. It will change in steps toward the end side. For example, as described above, the short fiber content of the first portion 60A is set to 5 wt%, the short fiber content of the second portion 60B is set to 10 wt%, and the short fiber content of the third portion 60C is set. In the form in which the amount is set to 20 wt%, the degree of the characteristic (short fiber content) increases stepwise from the axial front end side to the base end side. According to such a joining form, there is an advantage that each part is well connected and parts having the same shape can be connected. Note that the degree of characteristics may change continuously instead of stepwise, and may decrease stepwise or continuously from the axial front end side to the base end side.

  5B, the plurality of portions 60A, 60B, and 60C having different characteristics are joined to each other in the axial direction of the tip 12, and the joined portion is tapered. However, the taper formation form is opposite to that of FIG. Specifically, the proximal end portion 70 of the first portion 60A has a tapered outer surface 70a that tapers toward the proximal end side, while the distal end portion 72 of the second portion 60B faces the proximal end side. And has a concave portion 73 having a tapered inner surface 72a that tapers (expands toward the distal end side), and the base end portion 70 of the first portion 60A is inserted into the concave portion 73 of the second portion 60B. In this state, the first portion 60A and the second portion 60B are joined to each other.

  Similarly, the base end portion 75 of the second portion 60B has a tapered outer surface 75a that tapers toward the base end side, while the tip end portion 76 of the third portion 60C tapers toward the base end side. The base portion 75 of the second portion 60B is inserted into the recess portion 77 of the third portion 60C. The concave portion 77 has a tapered inner surface 76a (spreading toward the distal end side). In the state, the second portion 60B and the third portion 60C are joined to each other. According to such a joining form, for example, the outer layer can be formed thin by increasing the elastic modulus.

  5C, the plurality of portions 60A, 60B, and 60C having different characteristics are joined to each other in the axial direction of the tip 12, and the joint portion is tapered. The axial lengths of the two portions 60A and 60B are extremely shortened compared to the case of FIG. 5A, the second portion 60C covers the third portion 60C, and these portions are covered with the first portion. 60A is covered. In other words, a thin-walled first and second portions 60A and 60B are joined in the axial direction on the tip side of the third portion 60C. According to such a joining form, since a seam does not appear on the surface, an advantage of high strength can be obtained.

  5D and 5E, a plurality of portions 60A, 60B, 60C having different characteristics forming the solid body 60 are joined to each other in the radial direction of the tip 12. Specifically, with the solid first portion 60A as a core material, a tubular second portion 60B is fitted on the outer periphery thereof, and further, a tubular third portion is disposed on the outer periphery of the second portion 60B. It forms a joining form in which 60C is fitted. When the three portions 60A, 60B, and 60C are concentrically polymerized in this way and cut as shown by the broken line C1 in FIG. 5D, the overall shape is tapered. The tip 12 to be formed is formed. Alternatively, as shown by a broken line C2 in FIG. 5 (e), a cutting form in which the tip side is only the first portion 60A over a predetermined length is also conceivable. By changing the cutting form, it is possible to realize various tips with different tip tones.

  Therefore, in such a bonding form, the degree of characteristics (for example, the content (wt%) of the short fibers 22 in the matrix resin material 20 described above or the elastic modulus of the short fibers 22) is changed from the radial inner side to the radial direction. It will change in steps toward the outside. For example, as described above, the short fiber content of the first portion 60A is set to 5 wt%, the short fiber content of the second portion 60B is set to 10 wt%, and the short fiber content of the third portion 60C is set. In the form in which the amount is set to 20 wt%, the degree of characteristics (short fiber content) increases stepwise from the radially inner side to the radially outer side. According to such a joining form, the advantage that it can be used universally is acquired. Note that the degree of characteristics may change continuously instead of stepwise, and may decrease stepwise or continuously from the axial front end side to the base end side.

  The joining of the portions 60A, 60B, and 60C as described above may be performed by an injection molding method or a two-color molding method, which will be described later, or bonded to each other after the portions 60A, 60B, and 60C are separately molded. May be performed.

  An example in which the portions 60A, 60B, 60C are joined to each other by injection molding is shown in FIG.

  In this injection molding, the second portion 60B and the third portion 60C preliminarily molded by the injection molding are set in the mold 30 as shown in FIG. 6, and in this state, the first portion 60A is formed. Each portion 60A, 60B, 60C is integrally molded (joined) by injecting the fiber reinforced resin material containing the above-described short fibers into the mold 30. That is, in this stage of finally joining the first portion 60A, the second portion 60B and the third portion 60C are already joined together by another molding method using a mold having a corresponding shape. It has been done.

  The mold 30 is constituted by molds 31 and 32 that are vertically opened. A cavity 35 that is an outer shape of the tip 12 is formed on the joint surfaces 31a and 32a of the molds 31 and 32, and each mold is formed. 31 and 32 are formed with gates 36 for injecting fiber reinforced resin into predetermined positions. The gate 36 communicates with the hollow portion 35 and opens to the side. The molding machine nozzle 40 is inserted into the opening 36a, and a fiber reinforced resin material is injected as indicated by an arrow.

  As described above, the fiber reinforced resin material to be injected is a thermoplastic resin containing 3 to 50 wt% of short fibers having an average fiber diameter of 3 μm to 15 μm and an average fiber length of 0.5 mm to 10 mm as a reinforcing material. Yes, it is injected at a predetermined temperature (plastic temperature of approximately 200 ° C.). In this case, the temperature of the mold 30 is set to be lower than the injected fiber reinforced resin material, and the injected fiber reinforced resin material is cooled and cured from the surface layer side in contact with the inner surface of the mold 30. It becomes possible to do. That is, since the fiber-reinforced resin material to be injected is in a state of flowing along the axial length direction of the tip 12, the contained short fibers 22 are directed in the axial length direction along the flow, In order to cure from the surface side in this flow state, the short fibers on the surface side tend to be oriented in the axial direction. However, in the central region, since there is time until curing, in a state where the flow is stopped (a state in which the fiber reinforced resin material is substantially filled), it is possible to vary somewhat freely. The direction of the short fiber becomes anisotropic.

  Thus, depending on the difference between the temperature of the fiber-reinforced resin material to be injected and the temperature of the mold, and the injection direction, the short fibers on the radially outer peripheral side are oriented in the axial length direction as described above, and the center It is possible to make the short fibers in the region anisotropic. Note that the arrangement state of the short fibers as shown in FIG. 4 can be changed depending on the injection pressure of the injected fiber reinforced resin material, the temperature difference from the mold, the position of the gate, the number of gates, and the like. .

  The tip 12 of the present embodiment can be manufactured by, for example, extrusion molding or pultrusion molding other than the above-described manufacturing method. In this case, since the tip is formed in a columnar shape, it can be formed into a desired shape by performing centerless processing thereafter.

  In the present embodiment, it is preferable to use means for improving the mutual adhesion of the interfaces 60A, 60B, 60C of the solid body 60 between the portions 60A, 60B, 60C. For example, the interface part is melted by using the thermoplastic resin as the resin to be used (for example, the resin to be inserted into the mold and the resin to be poured into the mold at the time of insert molding). Peeling can be made difficult to occur. Alternatively, a fabric prepreg containing glass fibers (desirably having a resin impregnation amount of 30 wt% to 80 wt%) is disposed at the interface portion between the portions 60 </ b> A, 60 </ b> B, 60 </ b> C of the solid body 60. You may make it difficult to peel in a resin rich state. Or you may perform the process which increases a contact area to each interface site | part (outer surface site | part or inner surface site | part) of each part 60A, 60B, 60C of the solid body 60 so that the contact area of an interface part may increase. Specifically, for example, roughening treatment by sandblasting or the like, scratching in a spiral (concave), forming a concave on the surface (can be changed by selection of the grindstone) by centerless processing, You may form an uneven | corrugated level | step difference, or may form the taper of the level | step difference which makes a diameter narrow toward a front-end | tip.

  Further, in the present embodiment, in order to increase the bonding (connection) strength between the portions 60A, 60B, 60C of the solid body 60, a thread may be wound around and fixed to the outer periphery of the bonding portion between the portions, or The legs of the guide for inserting the fishing line may be wound around the outer periphery of the joint.

  In the present embodiment, since the portions 60A, 60B, 60C of the solid body 60 are connected in the longitudinal direction (see FIG. 5), there may be a case where two or more different types of materials exist on the longitudinal surface. Therefore, the flexibility may be different. When coating the surface in such a configuration, there may be a problem in adhesion with the coating. Therefore, it is preferable to form a coating by applying a primer that improves adhesion to at least one (preferably, one having a large curvature). In this case, examples of the primer include a urethane resin, an acrylic resin, an acrylic urethane resin, and an epoxy resin. Among these materials, a primer having a low hardness (soft) is particularly preferable.

  As described above, the tip 12 of the fishing rod 1 of this embodiment is a short fiber in which short fibers (short fibers having an average fiber diameter of 3 μm to 15 μm and an average fiber length of 0.5 mm to 10 mm) are dispersed in a matrix resin material. Since it consists of the reinforced resin body (solid body) 60, it can have the characteristic of being soft and not easily damaged. That is, in this solid body 60, since the reinforcing fiber does not extend from the base end to the tip end, the restriction due to the elongation of the reinforcing fiber is eliminated, and depending on the matrix resin material used, it is softer than the conventional (hard to break against displacement). It becomes possible to make a configuration. In addition, this softening improves fish sensitivity during actual fishing, and also improves eye sensitivity (subtle displacement of the tip) and biting (fish does not release the needle) performance. . Furthermore, when designing with the same hardness and strength, since the elastic modulus is low, the outer diameter can be increased, and the assembly workability can be improved.

  Further, the tip 12 of the fishing rod 1 of the present embodiment is formed by joining the plurality of portions 60A, 60B, and 60C having the different characteristics from each other, so that the solid body 60 is formed in various joining forms as described above. Thus, it is possible to obtain a soft and hard-to-break characteristic at a necessary degree in a required portion of the tip, and it is possible to realize various kinds of fishing rods.

  Although the embodiments of the present invention have been described above, the present invention can be modified as appropriate in addition to the above-described embodiments. For example, although the fishing rod of the present embodiment is configured to join a large number of rods, it may be configured as a single rod having the tip of the above-described characteristics. Moreover, although the cross-sectional shape of the tip is circular in cross section, the cross section may be non-circular such as elliptical. In the embodiment described above, the short fiber reinforced resin body is configured as a solid body, but may be configured as a hollow body. In that case, for example, a hollow body is obtained by previously arranging a core material in the cavity 35 of the mold 30 shown in FIG. 6 and pouring a material (fiber reinforced resin material containing short fibers) into the outer periphery of the core material. Is formed.

1 Fishing rod 12
12A Taper 20 Matrix resin 22 Short fiber 60 Short fiber reinforced resin body (solid)
60A, 60B, 60C Multiple parts with different characteristics

Claims (11)

In a fishing rod having a tip made of fiber reinforced resin,
The tip is made of a short fiber reinforced resin body formed by dispersing short fibers having an average fiber diameter of 3 μm to 15 μm and an average fiber length of 0.5 mm to 10 mm in a matrix resin material in a content of 3 to 50 wt%. Consisting of
The short fiber reinforced resin body is formed by joining a plurality of portions having different characteristics from each other.   The fishing rod according to claim 1, wherein the short fiber reinforced resin body is made of a solid body.   The fishing rod according to claim 1 or 2, wherein the plurality of portions having different characteristics have different short fiber contents (wt%) in the matrix resin material.   The fishing rod according to claim 1 or 2, wherein the plurality of portions having different characteristics have different elastic moduli of short fibers.   The fishing rod according to claim 1 or 2, wherein the plurality of portions having different characteristics are different in type of resin.   The fishing rod according to any one of claims 1 to 5, wherein the short fiber reinforced resin body is formed by joining the plurality of portions having different characteristics in the axial direction of the tip.   The fishing rod according to claim 6, wherein joint portions of the plurality of portions having different characteristics are tapered.   The fishing rod according to claim 6 or 7, characterized in that the degree of the characteristic increases stepwise or continuously from the axial front end side to the base end side.   The fishing rod according to any one of claims 1 to 5, wherein the short fiber reinforced resin body is formed by joining the plurality of portions having different characteristics in a radial direction of a tip.   The fishing rod according to claim 9, wherein the degree of the characteristic increases stepwise or continuously from the radially inner side toward the radially outer side.   The short fibers of the short fiber reinforced resin body are dispersed in the matrix resin material so that there are many anisotropic states on the radially inner side and many states oriented in the axial length direction on the radially outer peripheral side. The fishing rod according to any one of claims 1 to 10, wherein the fishing rod is characterized.

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