Fishing rod and formation method of rod body of fishing rod

Abstract

To provide a fishing rod including a rod body provided with a fishing line guide having improved smoothness of a surface of the rod body having a steep tapered portion, lightweight, and stable strength.SOLUTION: A fishing rod includes a first tapered part and a second tapered part adjacent to the first tapered part. The first tapered part is tapered toward the second tapered part. The second tapered part is tapered toward a direction of separating from the first tapered part. A diameter of a first end portion of the second tapered part on the first tapered part side is set to be larger than a diameter of a second end portion of the first tapered part on the second tapered part side. Leg parts of one fishing line guide of fishing line guides are placed in and fixed to both the first tapered part and the second tapered part so as to be across the first end portion and the second end portion.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fishing rod having a steeply tapered rod body provided with a fishing line guide, and to a method for forming a steeply tapered rod body for use in a fishing rod. [Background technology]

[0002] BACKGROUND ART Various methods for forming hollow rod bodies for use in fishing rods and fishing rods using rod bodies formed by these methods have been known.

[0003] As an example of such a fishing rod body, Patent Document 1 discloses a method in which a swollen portion having a non-circular cross section is formed at the base end of a core wire so that the core wire can be pulled out from the wound prepreg after heat curing treatment, a fishing rod prepreg is wound around this core wire, a heat-shrinkable tube is fitted over the wound portion of the fishing rod prepreg in the swollen portion of the core wire, a binding tape is wound spirally over the entire length of the wound portion of the fishing rod prepreg so as to overlap partially, and then a heat-curing treatment is performed, followed by removing the core wire, the binding tape and the heat-shrinkable tube to form a tubular body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 04-117231 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the method of forming a tubular body according to Patent Document 1, when forming a tubular body having a taper, particularly a steep taper, a gap inevitably occurs between the heat-shrinkable tube and the wound prepreg sheet due to the large degree of taper, and as a result, uniform pressure cannot be applied to the prepreg sheet, resulting in a problem that only a tubular body having poor strength and smoothness can be formed.

[0006] The present invention has been made in consideration of the above circumstances, and its object is to provide a fishing rod equipped with a rod body provided with a fishing line guide that improves the smoothness of the surface of the steeply tapered rod body, thereby eliminating or reducing the need for post-treatments such as painting, thereby enabling weight reduction, and also basically eliminating the need for post-treatments such as grinding, thereby providing stable strength, and to provide a method for forming a steeply tapered rod body for use in a fishing rod that eliminates or reduces the need for post-treatments such as painting, and basically eliminates the need for post-treatments such as grinding, thereby greatly improving the efficiency of the manufacturing process. Other objects of the present invention will become apparent by reading this specification as a whole. [Means for solving the problem]

[0007] A fishing rod according to one embodiment of the present invention has a rod body with a steep taper and one or more fishing line guides attached thereto, the rod body comprising a first tapered portion and a second tapered portion adjacent to the first tapered portion, the first tapered portion tapering toward the second tapered portion, and the second tapered portion tapering away from the first tapered portion, the diameter of a first end of the second tapered portion on the first tapered portion side being larger than the diameter of a second end of the first tapered portion on the second tapered portion side, and the leg of one of the fishing line guides is placed on and fixed to both the first tapered portion and the second tapered portion so as to straddle the first end and the second end.

[0008] In a fishing rod according to one embodiment of the present invention, the steep taper is defined as a taper in which (Φa-Φb) / c=2 / 1000 or more, where Φa is the outer diameter of one end (large diameter side) of the tapered portion, Φb is the outer diameter of the other end (small diameter side), and c is the longitudinal centerline distance of the tapered portion.

[0009] In a fishing rod according to one embodiment of the present invention, the diameter of the first end of the second tapered portion on the side of the first tapered portion is configured to be 0.1% to 5% larger than the diameter of the second end of the first tapered portion on the side of the second tapered portion.

[0010] In a fishing rod according to one embodiment of the present invention, the rod body further comprises a third tapered portion adjacent to the first tapered portion on the opposite side to the second tapered portion, the third tapered portion tapering toward the first tapered portion, the diameter of a third end of the first tapered portion on the third tapered portion side being larger than the diameter of a fourth end of the third tapered portion on the first tapered portion side, and the leg of another of the fishing line guides is placed on and fixed to both the first tapered portion and the third tapered portion so as to straddle the third end and the fourth end.

[0011] In a fishing rod according to one embodiment of the present invention, the rod body is further configured to include one or more tapered portions.

[0012] A method for forming a rod body having a steep taper for use in a fishing rod according to one embodiment of the present invention comprises winding a prepreg sheet around a mandrel, providing a plurality of tapered heat-shrinkable tubes along the axial direction of the mandrel on the outside of the wound prepreg sheet to match the outer shape of the steep taper to be formed, taping the outer surfaces of the heat-shrinkable tubes, and subjecting them to heat treatment, and after the heat treatment, removing the mandrel, the heat-shrinkable tubes, and the taping, and forming a molded product of the rod body.

[0013] A method for forming a rod body having a steep taper for use in a fishing rod according to one embodiment of the present invention, wherein two adjacent heat-shrinkable tubes of the plurality of heat-shrinkable tubes are configured to be provided outside the prepreg sheet so that their ends overlap by a predetermined length.

[0014] A method for forming a steeply tapered rod body for use in a fishing rod according to one embodiment of the present invention, wherein the predetermined length is configured to be in the range of 1 mm to 10 mm.

[0015] A method for forming a rod body having a steep taper for use in a fishing rod according to one embodiment of the present invention, wherein two adjacent heat-shrinkable tubes of the plurality of heat-shrinkable tubes are configured so that their ends are provided outside the prepreg sheet with a predetermined gap between them.

[0016] A method for forming a rod body having a steep taper for use in a fishing rod according to one embodiment of the present invention, wherein the predetermined interval is configured to have a length of 1 mm or more. [Effects of the Invention]

[0017] According to the above embodiment, it is possible to provide a fishing rod having a rod body with a fishing line guide that has stable strength and improves the smoothness of the surface of the rod body having a steep taper, thereby eliminating or reducing the need for post-processing such as painting, and also making post-processing such as grinding basically unnecessary; and it is also possible to provide a method for forming a rod body with a steep taper that eliminates or reduces the need for post-processing such as painting, and basically makes post-processing such as grinding unnecessary, thereby greatly improving the efficiency of the manufacturing process. [Brief explanation of the drawings]

[0018] [Figure 1] 1A to 1C are diagrams illustrating the structure of a fishing rod 1 according to an embodiment of the present invention. [Figure 2] 1A to 1C are diagrams illustrating the structure of a fishing rod 1 according to another embodiment of the present invention. [Figure 3] 1A to 1C are diagrams illustrating a method for forming a rod body 3 having a steep taper, which is used in a fishing rod 1 according to one embodiment of the present invention. [Figure 4] 10 is a diagram illustrating the placement of a heat-shrinkable tube 7 in a method for forming a fishing rod body having a steep taper used in an embodiment of the present invention. FIG. [Figure 5]10 is a diagram illustrating the placement of a heat-shrinkable tube 7 in a method for forming a fishing rod body having a steep taper used in an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, a fishing rod having a rod body with a steep taper according to the present invention and a method for forming (manufacturing) a rod body with a steep taper for use in a fishing rod will be specifically described with reference to the accompanying drawings. Components common to multiple drawings are designated by the same reference numerals throughout the multiple drawings. Please note that the drawings are not necessarily drawn to scale for the sake of convenience.

[0020] A fishing rod 1 according to one embodiment of the present invention will be described with reference to Figures 1 and 2. Figure 1 shows a fishing rod 1 according to one embodiment of the present invention, and Figure 2 shows a fishing rod 1 according to another embodiment of the present invention (please note that the reel, grip, etc. are omitted from each figure). First, as shown in Figure 1, the fishing rod 1 according to one embodiment of the present invention has a rod body 3 equipped with one or more fishing line guides 2 and having a steep taper, the rod body 3 comprising a first taper portion 3a and a second taper portion 3b adjacent to the first taper portion 3a, the first taper portion 3a tapering (tapering) as it progresses in the direction toward the second taper portion 3b, and the second taper portion 3b narrowing as it progresses in the direction away from the first taper portion 3a. The second tapered portion 3b has a tapered shape, and the diameter of a first end 3c of the second tapered portion 3b on the first tapered portion 3a side is larger than the diameter of a second end 3d of the first tapered portion 3a on the second tapered portion 3b side, and the leg 2b of one of the fishing line guides 2a is placed on and fixed to both the first tapered portion 3a and the second tapered portion 3b so as to straddle the first end 3c and the second end 3d. Here, not only can the diameter of the first end 3c of the second tapered portion 3b be larger than the diameter of the second end 3d of the first tapered portion 3a (as described above), but also the diameter of the first end 3c of the second tapered portion 3b be smaller than the diameter of the second end 3d of the first tapered portion 3a (for example, 0.1% to 5% smaller), but the former is described as an example in this specification. Furthermore, in a fishing rod according to one embodiment of the present invention, the steep taper is defined as a taper in which (Φa - Φb) / c = 2 / 1000 or greater, where Φa is the outer diameter of one end (large diameter side) of the tapered portion, Φb is the outer diameter of the other end (small diameter side), and c is the longitudinal centerline distance of the tapered portion. In the illustrated example, only one fishing line guide 2a is shown, but a plurality of fishing line guides 2 may be provided at predetermined intervals along the fishing rod body.Furthermore, instead of the fishing line guide 2a, a guide fixing portion 9 for fixing the fishing line guide 2a to the fishing rod body 3 may be used, and the guide fixing portion 9 may be fixed so as to cover the step (step) portion 4, and it has been found that this also makes it possible to significantly alleviate the occurrence of the local discontinuity in rigidity.

[0021] According to the fishing rod 1 of one embodiment of the present invention, the smoothness of the surface of the rod body 3 having a steep taper is improved, and post-processing such as painting is not only unnecessary or reduced, making it possible to reduce the weight, but also makes post-processing such as grinding basically unnecessary, making it possible to provide a fishing rod with a rod body equipped with a fishing line guide that has stable strength. In particular, as shown in the figure, a steeply tapered rod body has multiple tapered sections, and the ends of adjacent tapered sections have different outer diameters (as shown in the figure, the diameter of the first end 3c of the second tapered section 3b on the first tapered section 3a side is larger than the diameter of the second end 3d of the first tapered section 3a on the second tapered section 3b side). As a result, a step (step) is formed at both ends of adjacent tapered sections, and this step (step) may cause a local discontinuity in rigidity which may affect the strength of the rod body. However, it has been found that by providing a fishing line guide 2a at this step (step) section 4 as shown, and by placing and fixing the leg section 2b of the fishing line guide 2a so that it covers the step (step) section 4, it is possible to significantly alleviate the occurrence of this local discontinuity in rigidity. Here, the method of fixing the leg 2b of the fishing line guide 2 to the outer surface of the fishing rod body can be, for example, by winding line or a prepreg sheet around it, by using an adhesive, or by using the guide fixing part described above, but is not limited to these (the method of fixing the leg of the fishing line guide to the outer surface of the fishing rod body is the same throughout this specification.) For example, without attaching a fishing line guide, it is also possible to alleviate the local discontinuity in rigidity by winding line or prepreg around the stepped part, or by padding it with resin or an adhesive.

[0022] In a fishing rod 1 according to one embodiment of the present invention, the diameter of a first end 3c of the second tapered portion 3b on the side of the first tapered portion 3a is configured to be 0.1% to 5% larger than the diameter of a second end 3d of the first tapered portion 3a on the side of the second tapered portion 3b. As described above, a step (a step) is formed at both ends of adjacent tapered portions, and this step (a step) may cause a local discontinuity in rigidity that may affect the strength of the fishing rod body. However, by providing a fishing line guide 2a at the step (a step) portion 4 as shown in the figure, and by placing and fixing the leg portion 2b of the fishing line guide 2a so that it covers the step (a step) portion 4, it is possible to significantly mitigate the occurrence of the local discontinuity in rigidity.

[0023] As shown in FIG. 2, in a fishing rod 1 according to one embodiment of the present invention, the rod body 3 further includes a third tapered portion 3e adjacent to the first tapered portion 3a on the opposite side from the second tapered portion 3b, and the third tapered portion 3e becomes tapered as it progresses toward the first tapered portion 3a. The diameter of a third end 3f of the first tapered portion 3a on the third tapered portion 3e side is larger than the diameter of a fourth end 3g of the third tapered portion 3e on the first tapered portion 3a side. The leg 2d of another fishing line guide 2c of the fishing line guides 2 is placed on and fixed to both the first tapered portion 3a and the third tapered portion 3e so as to straddle the third end 3f and the fourth end 3g. Here, instead of the fishing line guides 2a, 2c, guide fixing parts 9a, 9b for fixing the fishing line guide 2a to the fishing rod body 3 may be used, and the guide fixing parts 9a, 9b may be fixed so as to cover the step (step) part 4, and it has been found that this also makes it possible to significantly alleviate the occurrence of the local discontinuity in rigidity.

[0024] According to the fishing rod 1 of one embodiment of the present invention, the surface smoothness of the rod body 3 having a steep taper is improved, and post-treatment such as painting is unnecessary or reduced, thereby enabling weight reduction. In addition, post-treatment such as grinding is basically unnecessary, making it possible to provide a fishing rod with a rod body provided with a fishing line guide, which has stable strength. In particular, as shown in the figure, a steeply tapered rod body has multiple tapered sections, but the ends of adjacent tapered sections have different outer diameters (as shown in the figure, the diameter of the first end 3c of the second tapered section 3b on the side of the first tapered section 3a is larger than the diameter of the second end 3d of the first tapered section 3a on the side of the second tapered section 3b, and the diameter of the third end 3f of the first tapered section 3a on the side of the third tapered section 3e is larger than the diameter of the fourth end 3g of the third tapered section 3e on the side of the first tapered section 3a). As a result, multiple steps (steps) are formed at both ends of adjacent tapered sections, and these steps (steps) may cause local discontinuities in rigidity that may affect the strength of the rod body. However, by providing fishing line guides 2a and 2c at these step (step) sections 4a and 4b as shown in the figure, and by placing and fixing the legs 2b and 2d of the fishing line guides 2a and 2c so that they cover the step (step) sections 4a and 4b, respectively, it is possible to significantly mitigate the occurrence of local discontinuities in rigidity.

[0025] In a fishing rod 1 according to one embodiment of the present invention, the rod body 3 is configured to have one or more additional tapered portions in addition to the tapered portions 3a, 3b, and 3e. In this way, multiple additional tapered portions can be formed, but because the ends of adjacent tapered portions have different outer diameters, multiple steps (steps) are formed at both ends of adjacent tapered portions. These steps (steps) can cause local discontinuities in rigidity that can affect the strength of the rod body. However, by providing fishing line guides at these step (step) portions and placing and fixing the legs of the fishing line guides so that they cover the respective step (step) portions, it is possible to significantly reduce the occurrence of local discontinuities in rigidity.

[0026] Next, a method for forming a rod body 3 having a steep taper used in a fishing rod 1 according to one embodiment of the present invention will be described with reference to Figure 3. As shown in the figure, the method for forming a rod body 3 having a steep taper used in a fishing rod 1 according to one embodiment of the present invention is as follows: (1) first, prepare a mandrel 5 having an outer diameter that matches the steep taper rod body 3 to be formed (Step A), (2) then, wind a prepreg sheet 6 on the outer surface of the mandrel 5 (Step B), and (3) further, on the outside of the wound prepreg sheet 6, a plurality of tapered heat-shrinkable tubes 7 ( In the illustrated example, two tapered heat-shrinkable tubes 7 are provided (Step C), (4) taping 8 is applied to the outer surface of the heat-shrinkable tube 7 (Step D), (5) the tubes are then heat-treated (for example, a curing process at a temperature of 120 to 150°C and a pressure of 0.1 to 2 MPa for approximately 1 to 2 hours) (Step E), and (6) after the heat treatment, the mandrel 5, the heat-shrinkable tube 7, and taping 8 are removed to form the molded product of the rod body 3. Here, the heat-shrinkable tube 7 refers to a tube whose inner and outer diameters shrink when heated at a predetermined temperature, and is made of a material such as a fluorine-based material or polyolefin. Furthermore, a tapered heat-shrinkable tube can be formed by processing an originally straight heat-shrinkable tube. In addition, in the illustrated example, two heat-shrinkable tubes 7 are provided, each of which has a tapered shape to match the sharply tapered rod body 3 that is to be formed, and the inner diameter is configured so that the clearance between the rod body after winding the prepreg sheet 6 around the mandrel 5 and the inner diameter of the heat-shrinkable tube 7 is 0.5 mm or less.

[0027] According to the method for forming a steeply tapered rod body 3 used in a fishing rod 1 according to one embodiment of the present invention, taping does not need to be applied directly to the prepreg sheet, so no tape marks remain, and the heat-shrinkable tube divided into multiple parts can apply internal pressure more uniformly and effectively to the prepreg sheet. This not only improves the smoothness of the surface of the rod body, but also eliminates or reduces the need for post-processing such as painting, and basically makes post-processing such as grinding unnecessary, making it possible to provide a method for forming a steeply tapered rod body used in a fishing rod that can significantly improve the efficiency of the manufacturing process.

[0028] Next, as shown in Figure 4, in a method for forming a fishing rod body having a steep taper for use in an embodiment of the present invention, two adjacent heat-shrinkable tubes 7a, 7b of the plurality of heat-shrinkable tubes 7 are configured to be provided on the outside of the prepreg sheet 6 so that their ends overlap by a predetermined length (T). Also, in a method for forming a fishing rod body having a steep taper for use in an embodiment of the present invention, the predetermined length is configured to be in the range of 1 mm to 10 mm. In this way, by overlapping the ends of the heat-shrinkable tubes 7a, 7b by such a length (T), it is possible to smooth the surface of the fishing rod over the entire length of the rod (one section).

[0029] Next, as shown in Figure 5, in a method for forming a fishing rod body having a steep taper for use in a fishing rod according to one embodiment of the present invention, two adjacent heat-shrinkable tubes 7a, 7b of the plurality of heat-shrinkable tubes 7 are configured so that their ends are provided on the outside of the prepreg sheet 6 with a predetermined gap (L) between them. Also, in a method for forming a fishing rod body having a steep taper for use in a fishing rod according to one embodiment of the present invention, the predetermined gap (L) is configured to be 1 mm or longer. By arranging the ends of the heat-shrinkable tubes 7a, 7b with a gap of this size (L) in this way, a step is created in the uneven parts by directly pressing the rod body with taping tape, and by placing a fishing line guide in the step, the fixing force of the fishing line guide can be maintained, and the surface of the parts where the fishing line guide is not fixed can be made smooth.

[0030] The dimensions, materials, and arrangement of each component described in this specification are not limited to those explicitly described in the embodiments, and each component can be modified to have any dimensions, materials, and arrangement that can be included in the scope of the present invention. Furthermore, components not explicitly described in this specification can be added to the described embodiments, and some of the components described in each embodiment can be omitted. [Explanation of symbols]

[0031] 1 fishing rod 2. One or more fishing line guides 2a 1 fishing line guide 2b Legs 2c Another Fishing Line Guide 2d legs 3 Rod body 3a First tapered section 3b Second tapered section 3c First end 3d Second end 3e Third tapered section 3f Third end 3g Fourth end 4 Step (step) part 4a, 4b Step part 5 mandrels 6 Prepreg sheet 7 Heat shrink tubing 7a, 7b Two adjacent heat shrink tubes 8. Taping 9 Guide fixing part 9a, 9b Guide fixing part

Claims

1. A fishing rod having one or more fishing line guides attached thereto and a rod body having a steep taper, the rod body comprises a first tapered portion and a second tapered portion adjacent to the first tapered portion, the first tapered portion tapering toward the second tapered portion, and the second tapered portion tapering away from the first tapered portion, and the diameter of a first end of the second tapered portion on the first tapered portion side is larger than the diameter of a second end of the first tapered portion on the second tapered portion side; A fishing rod characterized in that the leg portion of one of the fishing line guides is placed on and fixed to both the first tapered portion and the second tapered portion so as to straddle the first end and the second end.

2. 2. The fishing rod according to claim 1, wherein the steep taper is defined as a taper such that (Φa-Φb) / c=2 / 1000 or more, where Φa is the outer diameter of one end (large diameter side) of the tapered portion, Φb is the outer diameter of the other end (small diameter side), and c is the distance between the longitudinal center lines of the tapered portion.

3. 2. The fishing rod of claim 1, wherein a diameter of a first end of the second tapered portion on the first tapered portion side is 0.1% to 5% larger than a diameter of a second end of the first tapered portion on the second tapered portion side.

4. The rod body further includes a third tapered portion adjacent to the first tapered portion on the opposite side to the second tapered portion, the third tapered portion tapering toward the first tapered portion, and the diameter of a third end of the first tapered portion on the third tapered portion side is larger than the diameter of a fourth end of the third tapered portion on the first tapered portion side, 3. The fishing rod according to claim 1, wherein the leg portion of another of the fishing line guides is placed on and fixed to both the first tapered portion and the third tapered portion so as to straddle the third end and the fourth end.

5. The fishing rod according to claim 4 , wherein the rod body further comprises one or more tapered portions.

6. 1. A method of forming a steeply tapered rod body for use in a fishing rod, comprising: The prepreg sheet is wound around the mandrel, a plurality of tapered heat-shrinkable tubes are provided on the outside of the wound prepreg sheet along the axial direction of the mandrel to match the outer shape of the steep taper to be formed; Taping is applied to the outer surface of the heat shrink tube, These are heat treated, After the heat treatment, the mandrel, the heat-shrinkable tube, and the taping are removed to form the rod body molded product.

7. 7. The method for forming a fishing rod body according to claim 6, wherein two adjacent heat-shrinkable tubes of the plurality of heat-shrinkable tubes are provided on the outside of the prepreg sheet so that their ends overlap by a predetermined length.

8. 8. The method for forming a rod body for use in a fishing rod according to claim 7, wherein the predetermined length is in the range of 1 mm to 10 mm.

9. 7. The method for forming a fishing rod body according to claim 6, wherein two adjacent heat-shrinkable tubes of the plurality of heat-shrinkable tubes are provided on the outside of the prepreg sheet with their ends spaced apart by a predetermined distance.

10. 10. The method for forming a fishing rod body according to claim 9, wherein the predetermined interval has a length of 1 mm or more.

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