JP2024090182A - fishing rod - Google Patents

Abstract

To provide a fishing rod having a tip rod shaft in which a solid tip rod is fitted into a tubular handle rod, the boundary between the tip rod and the handle rod being reinforced without unevenness or wrinkles and having good flexibility.
[Solution] The fishing rod of the present invention has a tip rod shaft 10 formed by fitting a solid tip rod 12 into a tubular handle rod 15, and a reinforcing layer is formed to cover the joint 17 between the tip rod 12 and the handle rod 15. The reinforcing layer is formed by spirally winding a belt-shaped member 35A formed by laminating a resin film on glass cloth and heat fusing the resin film to the glass cloth, and the belt-shaped member is characterized in that the resin impregnation amount is 70 wt% or more.
[Selected figure] Figure 4

Description

The present invention relates to a fishing rod equipped with a tip shaft in which a solid tip is fitted into a tubular tip holder.

Conventionally, a fishing rod tip is known in which a solid tip is fitted into a tubular handle and the two are fixed by adhesive. When the tip and handle are joined, a step inevitably occurs and cracks occur at the joint when the tip and handle are bent significantly. For example, as disclosed in Patent Document 1, the joint is reinforced.
As a specific reinforcement mode, a reinforcing layer is formed by winding reinforced fiber prepreg and/or reinforced fiber tape around the joint area of the tip rod and the handle rod.

JP 2000-245307 A

The reinforcing layer described above is made of reinforced fiber prepreg, but Patent Document 1 does not specifically describe the structure of the reinforced fiber prepreg. Normally, the reinforcement fiber of the prepreg is carbon fiber, which is impregnated with resin and aligned in one direction in a versatile sheet shape (UD sheet; resin impregnation amount 20 to 40 wt%), and to make winding easier, the reinforcing fiber is oriented in the axial direction, as shown in Figure 5 (F) of Patent Document 1.

However, it was found that when the above-mentioned UD sheet was actually wound and cured, the resin flowed and caused cracks between adjacent reinforcing fibers, and sufficient reinforcement was not achieved. In addition, because the amount of resin impregnation was small, when the joints of the completed rod tip were enlarged, there were areas where the resin was not impregnated, and therefore stable strength was not obtained, and the surface was uneven and wrinkled (particularly in the case of the reinforcing fiber prepreg sheet, unevenness and wrinkles are likely to occur at the stepped parts), and the appearance was deteriorated. Furthermore, reinforcing fiber prepregs and reinforcing fiber tapes in which the carbon fibers are aligned in the axial direction have too much elasticity (high bending rigidity), which prevents the entire rod tip from bending flexibly.

The present invention was made in response to the above-mentioned problems, and aims to provide a fishing rod with a tip rod shaft in which a solid tip rod is fitted into a tubular tip rod, where the boundary between the tip rod and the tip rod is reinforced without unevenness or wrinkles, and has good flexibility.

To achieve the above-mentioned objective, the present invention provides a fishing rod having a tip shaft formed by fitting a solid tip into a tubular handle, and a reinforcing layer formed to cover the joint between the tip and handle. The reinforcing layer is formed by laminating a resin film onto a glass cloth, and then thermally welding the resin film to the glass cloth to form a belt-shaped member that is wound in a spiral shape, and the belt-shaped member has a resin impregnation amount of 70 wt% or more.

According to the fishing rod equipped with the tip rod of the above-mentioned configuration, the reinforcing layer wound around the tip rod prevents cracks and tears at the joint between the solid tip rod and the tubular tip rod. The reinforcing layer is formed by laminating a resin film on a glass cloth, and then winding the band-shaped member formed by heating and pressing the resin film in a spiral shape, so that it is easy to follow the steps that occur at the joint between the tip rod and the tip rod, and the occurrence of gaps is suppressed. Therefore, the reinforcing layer is prevented from having unevenness or wrinkles. In addition, since the band-shaped member is formed by laminating a resin film on the glass cloth and integrating it by heat welding, it is easy to configure the resin impregnation amount to 70 wt% or more. In this case, the resin impregnation amount of the band-shaped member being 70 wt% or more makes the winding work easier, and when the band-shaped member is heated and hardened, the glass fibers are embedded inside the resin, and the resin is abundantly supplied to the joint area. This makes it difficult for steps or wrinkles to form at the joint, resulting in a rod tip with a soft joint.

According to the present invention, in a fishing rod having a tip rod in which a solid tip rod is fitted into a tubular tip rod, the boundary between the tip rod and the tip rod is reinforced without unevenness or wrinkles, resulting in a fishing rod with good flexibility.

1 is a diagram showing an embodiment of a fishing rod according to the present invention. 1A is a diagram showing the configuration of the tip rod, FIG. 1B is a diagram showing the state before the holding rod and the tip rod are joined, and FIG. 1B is a diagram showing the state after the holding rod and the tip rod are joined. 1A is a diagram showing an example of a glass fiber reinforced sheet constituting a reinforcing layer (belt-shaped member) wound around the joint area of the holding rod and the tip rod, and FIG. 1B is a cross-sectional view showing the laminated structure. A diagram showing the state in which a belt-shaped member is wound around the joint area of the holding rod and the tip rod. 1A is a diagram showing a state in which a belt-shaped member is wound around the joint area of the holding rod and the tip rod, and FIG. 1A is a diagram showing the state in which a belt-shaped member is wound, then a PP tape is wound, and the belt-shaped member is heat-cured; FIG. 1B is a diagram showing the state in which the PP tape wound in the state of (a) has been peeled off; 13A and 13B are diagrams showing modified examples of the belt-shaped member. 4 is a cross-sectional view showing a reinforcing layer obtained after thermally hardening a strip-shaped member wound around the joint area of the tip rod and the handle rod. FIG.

FIG. 1 is a diagram showing an embodiment of a fishing rod according to the present invention.
The fishing rod 1 of this embodiment is configured with a butt rod 3, a middle rod 5, and a tip rod 10, and each rod is joined in a parallel joint or a telescopic joint. In this case, the middle rod 5 may be omitted, or multiple rods may be joined (FIG. 1 shows one middle rod). The fishing rod 1 of this embodiment is configured to have outer guides 8A-8F and a top guide 9 that guide the fishing line from the reel R attached to the reel seat 3A provided on the butt rod 3, but such outer guides may not be attached, and a fishing line fastener that fastens the fishing line may be attached to the tip of the tip rod 10.

The butt rod 3 and middle rod 5 are tubular bodies made of fiber-reinforced resin, and are formed to the prescribed dimensions in accordance with standard methods, such as by winding a so-called prepreg sheet, which is made of reinforced fibers (mainly carbon fibers or glass fibers) impregnated with synthetic resin, around a core bar, subjecting it to a heating process, and then removing the core.

The tip rod 10 is composed of a solid tip rod 12 which is the tip side, and a tubular tip support rod 15 into which the base end side of the tip rod 12 is fitted and fixed.
The configuration of the tip rod 10 and its manufacturing method (method of forming a reinforcing layer wound around the joint area of the tip rod and the handle rod) will be described below with reference to Figs. 2 to 6.

The tip rod 12 that constitutes the tip rod 10 is not limited to a specific material as long as it is constructed as a solid shape overall, such as a material with good flexibility, for example, a fiber-reinforced resin material in which carbon fiber or glass fiber is oriented in the axial direction and impregnated with a synthetic resin such as epoxy resin, a metal material such as a Ni-Ti alloy or an Fe-Al alloy, or even a composite material in which a core material (solid core material) formed of glass fiber-reinforced resin is coated with a fiber-reinforced resin layer.

The tip rod 12 made of the above-mentioned material has an insertion section 13 formed at its rear end, which is inserted into the tip opening of the tubular rod 15. This insertion section 13 has a tapered section 13A that narrows toward the rod, and a cylindrical section 13B that extends further from the tapered section toward the rod.

The tip rod 15 constituting the tip rod 10 is a tubular body made of fiber-reinforced resin, like the middle rod and the butt rod, and is formed to a predetermined size according to a standard method, for example, by winding a so-called prepreg sheet, which is made of reinforced fibers (mainly carbon fibers or glass fibers) impregnated with synthetic resin, around a core bar, undergoing a heating process, and then removing the core. The tip opening of this tip rod 15 is formed with a taper 15A that expands in diameter toward the tip side so that it is approximately the same as the tapered portion 13A of the insertion portion 13 of the tip rod 12.

In the above configuration, the fitting portion 13 of the tip rod 12 is fitted into the tip opening of the holding rod 15, the two tapered portions 13A and 15A are brought into contact with each other, and the contact surfaces of the two are glued together to form a joint 17 as shown in FIG. 2(b). When the tip rod 12 is fitted into the holding rod 15, this joint 17 creates a step 17a at the boundary where the two are brought into contact and fixed, and also creates a boundary line 17b along the circumferential direction at the boundary between the tip rod 12 and the holding rod 15, which are covered by the reinforcing layer described below.

3(a) and 3(b) are diagrams showing an example of a glass fiber reinforcing sheet constituting a reinforcing layer that is wound so as to cover a predetermined area including the joint 17. FIG.
In the present invention, the reinforcing layer 35 shown in FIG. 6 is formed by cutting a glass fiber reinforcing sheet 30 prepared in the following procedure into a strip to form a strip-shaped member 35A, which is then spirally wound around a specified area of the joint 17 and thermally cured (see FIGS. 4 and 5).

The belt-shaped member 35A (glass fiber reinforced sheet) is formed so that it has a higher resin impregnation amount than commonly used reinforcement members (prepreg using carbon fiber), and low-elasticity glass fiber is used as the reinforcing material. Specifically, as shown in Figures 3(a) and (b), the glass fiber reinforced sheet 30 is formed by stacking a glass cloth (a glass fiber sheet in which the orientation direction of the glass fiber is 0°/90° relative to the long side 31a) 31 in which glass fibers are plain woven and a resin film (hot melt film) 32 made of a thermosetting resin such as epoxy resin, and pressing the stacked sheets together while heating them with a heat press machine, or by transporting the glass cloth 31 and the resin film 32 in a stacked state and passing them through the heating and pressing rollers of a heat roll machine.

In this case, the amount of resin impregnation in the glass fiber reinforced sheet 30 is determined by the ratio between the amount (weight) of the resin film 32 and the amount (weight) of the glass cloth 31, so it is possible to adjust the amount of resin impregnation by changing the basis weight of the glass cloth 31, the thickness of the resin film 32, etc.
In the present invention, as described later, the glass fiber reinforcing sheet 30 is formed so that the resin impregnation amount is 70 wt % or more.

In addition, in this embodiment, a removable base sheet 33 is laminated on the opposite side of the resin film 32 from the glass cloth 31, and the base sheet 33 is peeled off during the actual winding operation, making the winding operation easy. Such a base sheet 33 can be made of paper, for example.

The glass cloth 31 may be a nonwoven sheet in which glass fibers are randomly dispersed, or a plain weave sheet in which glass fibers are woven. It is preferable to use a plain weave sheet so that stable strength can be exhibited.
In this manner, the glass fiber reinforced sheet 30 formed by laminating and thermocompressing the glass cloth 31, the resin film 32, and the base sheet 33 is cut to a predetermined width W to form a belt-shaped member 35A (see FIG. 3(a)).

As described above, the belt-shaped member 35A is wound in a spiral shape around the joint area including the joint 17 of the tip rod 12 and the tip support rod 15. In this case, it is preferable that the orientation of the glass fiber of the wound belt-shaped member 35A is inclined with respect to the axial length direction X of the tip rod around which it is wound, in particular, wound at an angle of approximately 45° with respect to the axial length direction X.

That is, as shown in FIG. 3(a), a rectangular glass cloth 31 woven so that the glass fibers are oriented at 0°/90° with respect to the long side 31a can be cut to a width W along the long side to form a belt-shaped member 35A. Then, as shown in FIG. 4, the belt-shaped member 35A thus cut can be spirally wound with a winding angle α of, for example, about 45° with respect to the axial length direction X in the joint region, thereby tilting the orientation of the glass fibers with respect to the tip rod (about 45°). This orientation of the glass fibers can improve the strength of the reinforcing layer 35.

In FIG. 3, the glass cloth is cut to form the belt-shaped member so that the glass fibers are oriented at 0°/90° to the long side, but the glass fibers may be cut to intersect at an angle to the long side. For example, as shown in FIG. 7, the glass cloth may be cut so that the glass fibers are oriented at 45°/45° to form belt-shaped member 35A, which may then be wound in a spiral shape.

In addition, if the width W of the belt-shaped member 35A is set to 4 mm to 6 mm, it will be possible to cover the boundary line 17b within the width W even if the winding angle (winding angle α relative to the axial direction X) is set to a certain degree. In addition, when winding the belt-shaped member 35A in a spiral shape in the joint region, if the overlap T is set to a range of 1 mm to 2 mm, there will be no increase in weight.

Here, a procedure for producing the tip rod 10 in which the tip rod 12 and the tip support rod 15 are joined together and the reinforcing layer 35 is formed by the belt-shaped member 35A will be described.
First, the tip rod 12 is fitted to the handle rod 15, and the joint between the two is fixed with an adhesive.
Next, the base sheet 33 of the belt-shaped member 35A formed as described above is peeled off and wound in a spiral shape around the joint 17. When winding, the winding starts from the tip rod 12 side, and the winding is continued toward the tip rod 15 at a predetermined winding angle α while ensuring the overlap T described above. When winding, it is preferable to wind at an angle of about 45° with respect to the axial direction X of the tip rod 10, because the orientation direction of the glass fibers of the glass fiber reinforced sheet 30 (belt-shaped member 35A) is inclined (about 45°) with respect to the axial direction X. In addition, the glass fiber reinforced sheet 30 has a high resin impregnation amount (70 wt% or more) and therefore has high viscosity, which, together with the above-mentioned orientation of the glass fibers, makes the winding work easy to perform, and the viscosity makes it easy to adhere to the surface of the rod.

In this case, it is preferable that the winding end position is located rearward of the end 13a of the cylindrical portion 13B. In other words, since the rigidity changes suddenly in the region of the cylindrical portion 13B, it is possible to suppress the sudden change in rigidity by winding the wire rearward of the end 13a of the cylindrical portion 13B.

As described above, after the belt-shaped member 35A is wound, PP tape is wrapped around the surface to stabilize the state, and the material is heated for a certain period of time (for example, 2 hours at about 95°C). Then, when the PP tape is peeled off after the belt-shaped member 35A has hardened, as shown in FIG. 5(b), unevenness is formed on the surface due to the peeling, but the unevenness can be smoothed out by subsequently carrying out a process to smooth the surface (smoothing process).

This smoothing process includes, for example, removing the PP tape, polishing the surface with an abrasive and degreasing it, forming a coating of a specified color by brushing or the like, and then drying, polishing, washing with water, degreasing, and other processes (such surface treatment processes may be performed multiple times). In this case, since the tip portion of the tip rod is soft, it is preferable to polish the apex side of the tape grain so that a large load is not placed on the tip portion when polishing. In other words, since it is preferable to perform the polishing process from the tip rod side to the holding rod side, it is preferable to wrap the belt-shaped member 35A from the tip rod 12 side to the holding rod 15 side as described above so that the surface can be easily smoothed.

As described above, when the belt-shaped member 35A is wound in a spiral shape and the PP tape 36 is wound on top of it and the heat curing process is performed, as shown in FIG. 6(a), the resin flows from the belt-shaped member 35A with a large amount of resin impregnation, displacing the PP tape 36 so that it rises. That is, the PP tape 36 is displaced so as to relieve stress during heat curing, so that the hardened resin forms a continuous protrusion 35a in the axial direction (as shown in FIG. 6(b), when the PP tape 36 is peeled off, the hardened resin forms a continuous protrusion 35a). In this surface state, when the polishing process is performed from the tip rod side to the tip rod side as shown by the tape winding direction (arrow direction), the end surface 35a' of the raised resin is polished, and the surface can be finished beautifully.

According to the tip rod 10 configured as described above, a reinforcing layer 35 made of a belt-shaped member 35A is formed in the joint area including the joint 17 of the tip rod 10, so that cracks and tears that tend to occur at the joint 17 between the solid tip rod 12 and the tubular tip rod 15 are prevented. In addition, the reinforcing layer 35 is formed by laminating a resin film 32 on a glass cloth 31, heating and pressing the resin film to form a glass fiber reinforcing sheet 30, cutting the belt-shaped member 35A, and winding it in a spiral shape, so that it easily follows the step 17a that occurs at the joint between the tip rod 12 and the tip rod 15, and the occurrence of gaps is suppressed. Therefore, the occurrence of unevenness and wrinkles in the reinforcing layer 35 is suppressed.

In addition, the belt-shaped member 35A is made by laminating the resin film 32 on the glass cloth 31 and then heating and pressurizing the laminate to form an integrated structure, so that the resin impregnation amount can be easily set to 70 wt% or more. By making the resin impregnation amount of the belt-shaped member 35A 70 wt% or more, when the belt-shaped member 35A is heated and hardened, the glass fibers are embedded in the resin, and further, resin is abundantly supplied to the joint 17 region, so that steps and wrinkles are unlikely to occur in the joint 17, and a tip rod 10 with a soft joint 17 can be obtained.
It is preferable that the outer diameter of the joint of the rod 15 is set to 1.5 mm to 2.5 mm, taking into consideration the bending strength and tone of the rod with respect to elasticity.

Here, the reason why the resin impregnation amount of the strip-shaped member 35A constituting the reinforcing layer 35 is set to 70 wt % or more will be described.
First, the plain weave glass cloth 31 used in the present invention is different from general glass cloth, and a very thin plain weave glass cloth called scrim is used. Specifically, a glass cloth with a glass fiber basis weight of 10 g/m ² to 30 g/m ² is used, and the resin impregnation amount of the plain weave glass cloth with such basis weight is set to 70 wt % or more. In this way, when a plain weave glass cloth with a low glass fiber basis weight is used, many gaps are generated, and a high resin impregnation amount can be achieved to fill these gaps. Then, when a belt-shaped member made with such a configuration is wound around the joint area, the influence of the glass cloth on the tone can be minimized, and since the thickness is also thin (25 to 85 μm), it is easy to obtain smoothness.

The strip-shaped member 35A that constitutes the reinforcing layer 35 was prepared by cutting multiple sheets of the following materials into the sizes described above: one made from a prepreg in which conventional carbon fibers were aligned in one direction (UD sheet with 40 wt% resin impregnation), and another made from plain woven glass fibers with resin impregnation of 50 wt%, 60 wt%, and 70 wt%. These were then spirally wound around the joint area, and the surface condition after hardening was examined.

Conventional prepregs (UD sheets made of carbon fiber) are highly rigid, making wrapping difficult, and the resulting reinforcing layer makes the rod tip too rigid. Also, because the amount of resin impregnation is small, the resin does not spread sufficiently due to the resin flow during hardening, and many steps and wrinkles were observed at the joint 17. These steps and wrinkles were improved when the glass fiber was woven in a plain weave and the resin impregnation amount was set to 50 wt% or 60 wt%, so the results showed that it is preferable to use glass fiber as the reinforcing fiber used in the reinforcing layer so as not to increase rigidity, and that a higher amount of resin impregnation is preferable.

As mentioned above, the joint between the tip rod and the handle rod has a step and is an area with a large difference in rigidity, but by spirally winding the belt-shaped member 35A around this area, the step can be effectively filled, and by using low-elasticity glass fiber, it is thought that the increase in bending rigidity can be suppressed. In particular, by increasing the amount of resin impregnation, the step at the joint can be effectively filled, and the occurrence of cracks and wrinkles can be suppressed.

When the resin impregnation amounts of the belt-shaped member were tested at 50 wt%, 60 wt%, and 70 wt%, the 70 wt% test piece showed almost no cracks or wrinkles on the surface after heat curing, indicating that a resin impregnation amount of 70 wt% or more for the wound belt-shaped member is good.
In this case, a larger amount of resin impregnation is preferable, but if it is too much, the weight will increase and the resin will flow out of the gaps in the PP tape during the heating process, making it easier for unwanted unevenness and wrinkles to form on the surface. Therefore, it is preferable to form the glass fiber reinforced sheet 30 (belt-shaped member 35A) so that the amount of resin impregnation is 85 wt % or less, or even 80 wt % or less.

Although the embodiment of the present invention has been described above, the present invention is not limited to the shape of the above embodiment and can be modified in various ways. The thickness of the glass cloth 31 and the resin film 32 described above is not particularly limited, and can be set appropriately so as to improve winding workability and prevent weight increase. Furthermore, the glass cloth 31 may be configured to include glass fibers, and the configuration can also be modified appropriately. In this case, when the glass fibers of the glass cloth 31 are plain woven, the inclination direction of each inclined reinforcing fiber is not limited, and it is sufficient that the orientation direction of the glass fibers is inclined with respect to the axial length direction X of the tip rod 10 when wound.

Reference Signs List 1 Fishing rod 10 Tip rod 12 Tip rod 15 Rod handle 17 Joint 30 Glass fiber reinforcement sheet 31 Glass cloth 32 Resin film 35 Reinforcement layer 35A Belt-shaped member

Claims (6)

A fishing rod having a tip rod formed by fitting a solid tip rod into a tubular tip rod, and a reinforcing layer formed to cover the joint between the tip rod and the tip rod,
the reinforcing layer is configured by laminating a resin film on a glass cloth and thermally fusing the resin film to the glass cloth to form a belt-shaped member, and then winding the belt-shaped member in a spiral shape;
The fishing rod is characterized in that the belt-shaped member has a resin impregnation amount of 70 wt % or more. The fishing rod according to claim 1, characterized in that the belt-shaped member is made of plain woven glass fibers. The fishing rod according to claim 2, characterized in that the orientation direction of the glass fibers is inclined with respect to the axial length direction of the tip rod around which it is wound. The fishing rod according to claim 1, characterized in that the belt-shaped member has a width of 4 mm to 6 mm and is wound in a spiral shape with an overlap of 1 mm to 2 mm. The fishing rod according to claim 1, characterized in that the outer diameter of the rod tip at the joint is 1.5 mm to 2.5 mm. The fishing rod according to claim 1, characterized in that the joint area is smoothed by polishing and painting after the belt-shaped member is wound and hardened.

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