fishing rod

Abstract

To provide a fishing rod having a tip section rod in which a solid tip rod is fitted into a tubular tip-holding rod, the fishing rod being reinforced at the boundary between the tip rod and the tip-holding rod without causing unevenness or wrinkles, and having good flexibility.SOLUTION: The fishing rod has a tip section rod 10 configured by fitting a solid tip rod 12 into a tubular tip-holding rod 15, and a reinforcing layer is formed to cover a joint 17 between the tip rod 12 and the tip-holding rod 15. The reinforcing layer is configured by spirally winding a strip-shaped member 35A that is formed by laminating a resin film onto a glass cloth and thermally welding the resin film to the glass cloth. The strip-shaped member is characterized by having an impregnation amount of the resin of 70 wt.% or more.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a fishing rod having a tip rod with a solid tip rod inserted into a tubular tip holding rod.

Background Art

[0002] Conventionally, as a tip rod of a fishing rod, a solid tip rod is inserted into a tubular tip holding rod, and both are fixed by adhesion. When the tip rod and the tip holding rod are joined, a step is inevitably generated, and cracks or the like occur at the joint when bent greatly. Therefore, as disclosed in Patent Document 1, for example, the joint portion is reinforced. As a specific reinforcement mode, a reinforcement layer is formed by winding a reinforcing fiber prepreg and / or a reinforcing fiber tape around the joint region of the tip rod and the tip holding rod.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The above-described reinforcement layer is composed of a reinforcing fiber prepreg, but Patent Document 1 does not specifically describe the configuration of the reinforcing fiber prepreg. Usually, carbon fiber is used as the reinforcing fiber of the prepreg, and a general-purpose sheet (UD sheet; resin impregnation amount is 20 to 40 wt%) obtained by impregnating this with resin and aligning it in one direction is used. As shown in FIG. 5(F) of Patent Document 1, the direction of the reinforcing fiber is in the axial direction so that the winding operation is easy.

[0005] However, when the reinforced fiber prepreg sheet made of UD sheet material was actually wound and cured, it was found that resin flow caused cracks and fissures to form between adjacent reinforcing fibers, resulting in insufficient reinforcement. Furthermore, due to the low amount of resin impregnation, when the joint portion of the finished rod tip was magnified, areas without resin impregnation were found, resulting in inconsistent strength and surface irregularities and wrinkles (particularly in reinforced fiber prepreg sheets, where irregularities and wrinkles tend to form at stepped areas), leading to a deterioration in appearance. Moreover, with reinforced fiber prepregs and reinforced fiber tapes in which carbon fibers are aligned in the axial direction, the elasticity becomes too high (resulting in high bending rigidity), hindering the flexible bending of the entire rod tip.

[0006] The present invention was made based on the above-mentioned problems, and aims to provide a fishing rod having a tip rod rod in which a solid tip rod is fitted into a tubular tip rod, in which the boundary portion between the tip rod and the tip rod is reinforced without unevenness or wrinkles and has good flexibility. [Means for solving the problem]

[0007] To achieve the above objectives, the present invention provides a fishing rod having a tip rod 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, wherein the reinforcing layer is formed by laminating a resin film onto a glass cloth and heat-welding the resin film to the glass cloth, and winding a strip-shaped member in a spiral manner, and the strip-shaped member is characterized in that the resin impregnation amount is 70 wt% or more.

[0008] In a fishing rod equipped with the tip rod shaft configured as described above, the reinforcing layer wrapped around the tip rod shaft prevents cracking and splitting at the joint between the solid tip rod and the tubular butt section. The reinforcing layer is formed by laminating a resin film onto glass cloth, heating and pressing the resin film to create a strip-shaped member, which is then wound spirally. This makes it easier to follow the steps that occur at the joint between the tip rod and the butt section, suppressing the formation of gaps. As a result, unevenness and wrinkles in the reinforcing layer are suppressed. Furthermore, since the strip-shaped member is formed by laminating a resin film onto glass cloth and heat-welding it, it becomes easier to achieve a resin impregnation amount of 70 wt% or more. In this case, a resin impregnation amount of 70 wt% or more in the strip-shaped member makes the winding process easier, and when the strip-shaped member is heated and hardened, the glass fibers become embedded in the resin, ensuring a sufficient supply of resin to the joint area. This results in a rod tip section that is less prone to unevenness or wrinkles at the joints, and has a softer action at the joints. [Effects of the Invention]

[0009] According to the present invention, in a fishing rod having a tip rod rod in which a solid tip rod is fitted into a tubular tip rod, the boundary portion between the tip rod and the tip rod is reinforced without the occurrence of irregularities or wrinkles, and a fishing rod with good flexibility can be obtained. [Brief explanation of the drawing]

[0010] [Figure 1] A diagram showing one embodiment of a fishing rod according to the present invention. [Figure 2] This diagram shows the structure of the tip section of a fishing rod. (a) shows the state before the main section and the tip section are joined together, and (b) shows the state after the main section and the tip section are joined together. [Figure 3] (a) is a diagram showing an example of a glass fiber reinforced sheet that constitutes a reinforcing layer (strip-shaped member) wrapped around the joint area between the main section and the tip section of a fishing rod, and (b) is a cross-sectional view showing the laminated structure. [Figure 4] This diagram shows a strip-shaped member being wrapped around the joint area between the main section and the tip section. [Figure 5] (a) is a diagram showing a strip-shaped member wrapped around the joint area between the main section and the tip section, and (b) is a cross-sectional view thereof. [Figure 6] (a) is a diagram showing the state after a strip-shaped member has been wound, then wrapped with PP tape, and the strip-shaped member has been heat-cured. (b) is a diagram showing the state after the PP tape wrapped in (a) has been peeled off. [Figure 7] A diagram showing a modified example of the strip-shaped member. [Figure 8] A cross-sectional view showing the reinforcing layer obtained after heat curing of a strip-shaped member wrapped around the joint area between the main section and the tip section. [Modes for carrying out the invention]

[0011] Figure 1 shows one embodiment of a fishing rod according to the present invention. The fishing rod 1 of this embodiment is configured to include a butt rod 3, a middle rod 5, and a tip rod 10, with each rod being joined by a parallel joint or telescopic joint. In this case, the middle rod 5 may be omitted, or multiple rods may be joined together (Figure 1 shows one middle rod). Furthermore, the fishing rod 1 of this embodiment is configured to have external guides 8A to 8F and a top guide 9 attached to the reel seat 3A on the butt rod 3 to guide the fishing line from the reel R attached to the reel seat 3A, but it may also be configured without such external guides, with a fishing line fastener attached to the tip of the tip rod 10 to secure the fishing line.

[0012] The aforementioned main rod 3 and middle rod 5 are tubular bodies made of fiber-reinforced resin. For example, they are formed to predetermined dimensions according to standard methods, such as winding a so-called prepreg sheet, which is made by impregnating reinforcing fibers (mainly carbon fibers or glass fibers, etc.) with synthetic resin, onto a core, and then removing the core after a heating process.

[0013] The aforementioned tip rod 10 is composed of a solid tip rod 12 that forms the front end and a tubular tip support rod 15 into which the base end of the tip rod 12 is fitted and fixed. The structure of the tip rod shaft 10 and its manufacturing method (method for forming the reinforcing layer wrapped around the joint area between the tip rod and the main rod) will be described below with reference to Figures 2 to 6.

[0014] The spike tip rod 12 that constitutes the spike tip rod 10 is made of a material with good flexibility, such as carbon fiber or glass fiber, oriented in the axial length direction, and impregnated with a synthetic resin such as epoxy resin to form a fiber reinforced resin material, a metal material such as Ni-Ti alloy or Fe-Al alloy, or a composite material in which a coating layer of fiber reinforced resin is provided on a core material (solid core material) formed of glass fiber reinforced resin. As long as it is configured to be solid as a whole, it is not limited to a specific material.

[0015] The spike tip rod 12 formed of the above-described materials has a fitting portion 13 formed at its rear end side to be fitted into the tip opening of the tubular spike holding rod 15. This fitting portion 13 has a tapered portion 13A that tapers toward the spike holding rod and a cylindrical portion 13B that extends further toward the spike holding rod side from the tapered portion.

[0016] Also, the spike holding rod 15 that constitutes the spike tip rod 10 is a tubular body made of fiber reinforced resin, similar to the middle rod and the original rod. For example, a so-called prepreg sheet in which reinforcing fibers (mainly carbon fiber, glass fiber, etc.) are impregnated with synthetic resin is wound around a mandrel, and after passing through a heating process, it is demolded and formed into a predetermined size according to a conventional method. A taper 15A that expands toward the tip side is formed at the tip opening portion of the spike holding rod 15 so as to be approximately the same as the tapered portion 13A of the fitting portion 13 of the spike tip rod 12.

[0017] In the above-described configuration, the fitting portion 13 of the spike tip rod 12 is fitted into the tip opening of the spike holding rod 15, the two tapered portions 13A and 15A are applied, and the contact surfaces of the two are adhered, so that a joint portion 17 is formed as shown in Fig. 2(b). In this joint portion 17, when the spike tip rod 12 is fitted into the spike holding rod 15, a step 17a is generated at the boundary portion where the two are applied and fixed, and a boundary line 17b is generated along the circumferential direction at the boundary portion between the spike tip rod 12 and the spike holding rod 15, but these are covered by the following reinforcing layer.

[0018] Figs. 3(a) and (b) are diagrams showing an example of a glass fiber reinforced sheet that constitutes a reinforcing layer wound so as to cover a predetermined range including the joint portion 17. In the present invention, the reinforcing layer 35 shown in Figure 6 is formed by cutting a glass fiber reinforcing sheet 30, which is prepared by the following procedure, into a strip-shaped member 35A, winding this in a spiral manner around a predetermined area of ​​the joint 17, and then heat-curing it (see Figures 4 and 5).

[0019] The aforementioned strip-shaped member 35A (glass fiber reinforced sheet) is formed to have a higher resin impregnation amount than commonly used reinforcing members (prepregs using carbon fibers), and low-elasticity glass fibers are used as the reinforcing material. Specifically, as shown in Figures 3(a) and (b), the glass fiber reinforced sheet 30 is formed by laminating a glass cloth (a glass fiber sheet in which the direction of glass fibers is oriented at 0° / 90° with respect 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 then pressing them while heating them in a hot press machine, or by transporting the laminated glass cloth 31 and resin film 32 and passing them through the heating and compression rollers of a hot roll machine.

[0020] In this case, the amount of resin impregnation of the glass fiber reinforced sheet 30 is determined by the ratio of the amount (weight) of the resin film 32 to the amount (weight) of the glass cloth 31. Therefore, the amount of resin impregnation can be adjusted 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 reinforced sheet 30 is formed such that the resin impregnation amount is 70 wt% or more.

[0021] Furthermore, in this embodiment, a peelable base sheet 33 is laminated on the side of the resin film 32 opposite to the glass cloth 31, so that the base sheet 33 can be peeled off during the actual winding operation, making the winding operation easier. Such a base sheet 33 can be made of paper, for example.

[0022] The glass cloth 31 can be a nonwoven fabric sheet in which glass fibers are randomly dispersed, or a plain weave sheet in which glass fibers are woven together, but it is preferable to use a plain weave sheet in order to achieve stable strength. In this manner, the glass fiber reinforced sheet 30, formed by laminating and heat-pressing the glass cloth 31, resin film 32, and base sheet 33, is cut to a predetermined width W to form a strip-shaped member 35A (see Figure 3(a)).

[0023] As described above, the strip-shaped member 35A is wound spirally around the joint region including the joint portion 17 between the tip rod 12 and the main rod 15. In this case, it is preferable that the direction of the glass fibers of the wound strip-shaped member 35A is inclined with respect to the axial length direction X of the tip rod shaft around which it is wound, and in particular, that it is wound at approximately 45° with respect to the axial length direction X.

[0024] In other words, as shown in Figure 3(a), a rectangular glass cloth 31, which is woven so that the glass fibers are oriented at 0° / 90° with respect to the long side 31a, can be cut along the long side with a width W to form a strip-shaped member 35A. Then, as shown in Figure 4, the strip-shaped member 35A cut in this way can be spirally wound in the joint region with a winding angle α of approximately 45° with respect to the axial length direction X, thereby tilting the direction of the glass fibers toward the tip rod (approximately 45°). This direction of direction of the glass fibers makes it possible to improve the strength of the reinforcing layer 35.

[0025] In Figure 3, the glass cloth was cut so that the glass fibers were at a 0° / 90° angle to the long side to form a strip-shaped member. However, it is also possible to cut the glass cloth so that it intersects the long side in a direction that is inclined. For example, as shown in Figure 7, the glass cloth could be cut so that the glass fibers are at a 45° / 45° angle to form a strip-shaped member 35A, which could then be wound in a spiral shape.

[0026] Furthermore, if the width W of the strip-shaped member 35A is formed to be 4 mm to 6 mm, it is possible to cover the boundary line 17b within its width W, even with a certain winding angle (winding angle α relative to the axial length direction X). In addition, when winding the strip-shaped member 35A spirally in the joint region, the weight will not increase if the overlap T is within the range of 1 mm to 2 mm.

[0027] Here, we will describe the procedure for creating the tip rod 10, which involves joining the tip rod 12 and the main rod 15 and forming a reinforcing layer 35 with the strip-shaped member 35A. First, the tip section 12 is fitted onto the main section 15, and the joint between the two is secured with adhesive. Next, the base sheet 33 of the strip-shaped member 35A formed as described above is peeled off and wound spirally around the joint portion 17. When winding, the winding is started from the tip rod 12 side and wound toward the main rod 15 at a predetermined winding angle α while ensuring the overlap T described above. When winding, it is preferable to set the winding angle to approximately 45° with respect to the axial length direction X of the tip rod shaft 10, because this causes the direction of the glass fibers of the glass fiber reinforcement sheet 30 (strip-shaped member 35A) to be inclined with respect to the axial length direction X (approximately 45°). In addition, the glass fiber reinforcement sheet 30 has a high resin impregnation amount (70 wt% or more) and therefore has high viscosity, which, combined with the direction of the glass fibers as described above, makes the winding work easier and also makes it easier to adhere to the surface of the rod shaft due to its viscosity.

[0028] In this case, it is preferable that the end position of the winding be behind the end 13a of the cylindrical portion 13B described above. That is, since the rigidity changes abruptly in the region of the cylindrical portion 13B, winding the material beyond the end 13a of the cylindrical portion 13B makes it possible to suppress abrupt changes in rigidity.

[0029] As described above, after the strip-shaped member 35A is wrapped, PP tape is wrapped around its surface to stabilize it, and it is heated for a certain period of time (for example, 2 hours at about 95°C). After the strip-shaped member 35A has hardened, when the PP tape is peeled off, as shown in Figure 5(b), irregularities are formed on the surface due to peeling. However, by continuing to perform a surface smoothing process, these irregularities can be flattened.

[0030] This smoothing process includes steps such as peeling off the PP tape, polishing the surface with an abrasive and degreasing it, forming a coating of a predetermined color by brushing, drying, polishing, washing with water, and degreasing (such surface treatment steps may be performed multiple times). In this case, it is preferable to polish the apex side of the tape pattern so that the tip portion of the rod tip is soft and less stress is placed on the tip portion during polishing. That is, it is preferable to perform the polishing process from the rod tip side toward the rod end, so it is preferable to wrap the strip-shaped member 35A from the rod tip 12 side toward the rod end 15, as described above, so that the surface can be easily smoothed.

[0031] As described above, when the strip-shaped member 35A is wound spirally and the PP tape 36 is wound over it and then heat-cured, as shown in Figure 6(a), the resin flows out from the strip-shaped member 35A, which has a large amount of resin impregnation, and displaces the PP tape 36 in a way that causes it to bulge. In other words, the PP tape 36 is displaced in a way that relieves stress during heat curing, so the cured resin forms a continuous convex portion 35a in the axial direction (as shown in Figure 6(b), when the PP tape 36 is peeled off, the cured resin forms a continuous convex portion 35a). With this surface condition, if polishing is performed from the tip rod side toward the tip rod side, as shown in the tape winding direction (arrow direction), the raised resin end face 35a' side is polished, and the surface can be finished smoothly.

[0032] With the tip rod 10 configured as described above, a reinforcing layer 35 made of a strip-shaped member 35A is formed in the joint region including the joint portion 17 of the tip rod 10, thereby preventing cracks and splits that are likely to occur at the joint portion 17 between the solid tip rod 12 and the tubular tip rod 15. Furthermore, the reinforcing layer 35 is constructed by creating a strip-shaped member 35A by cutting a glass fiber reinforcing sheet 30, which is formed by laminating a resin film 32 onto a glass cloth 31, heating and pressing the resin film, and then winding it in a spiral shape. This makes it easier to follow the step 17a that occurs at the joint portion between the tip rod 12 and the tip rod 15, and prevents gaps from forming. As a result, unevenness and wrinkles in the reinforcing layer 35 are prevented.

[0033] Furthermore, since the strip-shaped member 35A is formed by laminating a resin film 32 onto a glass cloth 31 and then heating and pressurizing it to integrate them, it becomes easier to achieve a resin impregnation amount of 70 wt% or more. When the resin impregnation amount of the strip-shaped member 35A is 70 wt% or more, when the strip-shaped member 35A is heated and cured, the glass fibers become embedded in the resin, and moreover, resin is abundantly supplied to the area of ​​the joint 17, so that steps and wrinkles are less likely to form in the joint 17, and a rod tip 10 with a soft joint 17 can be obtained. Furthermore, the outer diameter of the joint portion of the tip section 15 is preferably formed to be 1.5 mm to 2.5 mm, taking into consideration the bending strength relative to elasticity and the action.

[0034] Here, we will explain the reason why the resin impregnation amount of the strip-shaped member 35A constituting the reinforcing layer 35 was set to 70 wt% or more. First, the plain weave glass cloth 31 used in this invention differs from general glass cloth in that a very thin plain weave glass cloth called scrim is used. Specifically, the weight of the glass fibers is 10 g / m 2 ~30g / m 2A material with a low fiber density is used, and the resin impregnation amount is set to 70 wt% or more in a plain weave glass cloth with such a density. In this way, using a plain weave with a low fiber density creates many gaps, and a high resin impregnation amount can be achieved to fill these gaps. When a strip member made with this configuration is wound around the joint area, the influence of the glass cloth on the texture can be minimized, and since the thickness is thin (25-85 μm), it is easy to obtain smoothness.

[0035] For the strip-shaped member 35A constituting the reinforcing layer 35, we prepared multiple pieces by cutting each of the following materials to the sizes described above: one formed from a prepreg with carbon fibers aligned in one direction (UD sheet with a resin impregnation amount of 40 wt%) and another made from plain-woven glass fibers with resin impregnation amounts of 50 wt%, 60 wt%, and 70 wt%. These pieces were then wound spirally around the joint area, and the surface condition after hardening was examined.

[0036] Conventional prepregs (UD sheets made of carbon fiber) are highly rigid, making them difficult to wrap, and the resulting reinforcement layer makes them too rigid for use as a rod tip. Furthermore, due to the low resin impregnation, the resin does not spread sufficiently during curing, resulting in many steps and wrinkles at the joint 17. These steps and wrinkles were improved when glass fibers were plain woven and the resin impregnation amount was increased to 50 wt% and 60 wt%. Therefore, it was found that it is preferable to use glass fibers as the reinforcing fiber for the reinforcement layer to avoid excessive rigidity, and that a higher resin impregnation amount is preferable.

[0037] As described above, the joint between the tip section and the main section of the rod has a step, resulting in a significant difference in rigidity. However, by spirally wrapping the strip-shaped member 35A around this joint, the step can be effectively filled, and the use of low-elasticity glass fiber can suppress an increase in bending rigidity. In particular, increasing the amount of resin impregnation can effectively fill the step at the joint, suppressing the occurrence of cracks and wrinkles.

[0038] When the resin impregnation amount of the strip-shaped material was tested at 50wt%, 60wt%, and 70wt%, the 70wt% test piece showed almost no cracking or wrinkling on the surface after heat curing. Therefore, it was found that a resin impregnation amount of 70wt% or higher is optimal for the wound strip-shaped material. In this case, a larger amount of resin impregnation is preferable, but if it is too much, the weight will increase, and during the heating process, the resin will flow out through the gaps in the PP tape, making it easy for unwanted irregularities and wrinkles to occur on the surface. Therefore, it is preferable to form the glass fiber reinforced sheet 30 (strip-shaped member 35A) with an impregnation amount of 85 wt% or less, and even 80 wt% or less.

[0039] Although embodiments of the present invention have been described above, the present invention is not limited to the shapes of the embodiments described above and can be modified in various ways. The thickness of the glass cloth 31 and resin film 32 described above is not particularly limited and can be set appropriately so as not to increase winding workability or weight. Furthermore, the glass cloth 31 only needs to have a composition that includes glass fibers, and its composition can also be modified as appropriate. 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 direction of orientation of the glass fibers is inclined with respect to the axial length direction X of the tip rod 10 when wound. [Explanation of symbols]

[0040] 1 fishing rod 10. Tip section of the rod 12 Tip Rod 15. Tip-holding rod 17 Joint 30 Fiberglass Reinforced Sheets 31 Glass cloth 32 Resin film 35 Reinforcement layer 35A Strip-shaped member

Claims

1. A fishing rod having a tip rod rod formed by fitting a solid tip rod into a tubular tip rod, and having a reinforcing layer formed to cover the joint between the tip rod and the tip rod, The reinforcing layer is formed by laminating a resin film onto a glass cloth and heat-welding the resin film to the glass cloth, and then winding the resulting strip-shaped member in a spiral shape. The aforementioned strip-shaped member is characterized by having a resin impregnation amount of 70 wt% or more.

2. The fishing rod according to claim 1, characterized in that the strip-shaped member is made of glass fibers woven in a plain weave.

3. The fishing rod according to claim 2, characterized in that the direction of orientation of the glass fibers is inclined with respect to the axial length direction of the tip rod that is wound around it.

4. The fishing rod according to claim 1, characterized in that the strip-shaped member has a width of 4 mm to 6 mm and is wound spirally with an overlap of 1 mm to 2 mm.

5. The fishing rod according to claim 1, characterized in that the outer diameter at the joint of the tip section is 1.5 mm to 2.5 mm.

6. The fishing rod according to claim 1, characterized in that the joint area is smoothed by polishing and painting after the strip-shaped member has been wound and hardened.

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