Telescopic rod

Abstract

To provide a telescopic rod that can be used by changing a rod length in accordance with conditions of fishing without giving a change in a user's fishing sense, while suppressing increase of cost.SOLUTION: A telescopic rod is provided that has an original rod body 10 having a rod butt end, and multiple rod bodies 11-16 sequentially drawn from the original rod body 10 and engaged. In the telescopic rod, at least one first replacement rod body 11A among the multiple rod bodies 11-16 is provided interchangeably with a second replacement rod body 11B of the length unlike the first replacement rod body 11A, and an inclination of a virtual line K for connecting a rod butt end 10a with a point 10b becomes the same when a constant load is imparted while the rod is held in a fixed angle in the case when the first replacement rod body 11A is mounted and when the second replacement rod body 11B is mounted.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention is a telescopic rod Regarding. [Background technology]

[0002] Conventional ayu fishing rods are generally telescopic rods that have a base rod body with a grip portion and multiple rod bodies that are sequentially swung out from the base rod body and engage with each other when swung out (see, for example, Patent Document 1). Ayu fishing is generally done using a method called "Tomodori," in which ayu bait is set adrift and the approaching ayu are caught. The fishing rod used for this is an ayu rod, typically made up of seven rod sections, including the rod base, and measuring approximately 9 meters in length. Long rods can be used in open rivers without obstacles like power lines, bridge girders, or trees, but in areas with obstacles, a rod that is too long requires careful handling. There is also a demand for rods that can be adjusted in length depending on the ayu fishing style, such as when using a long rod to cover a wide area in a wide river, when using a shorter rod to fish more carefully even in a wide river, or when using a shorter rod in a narrow tributary or other river.

[0003] Therefore, as a telescopic rod such as ayu fishing rod that can change its length, there is known a rod that allows you to replace rods of different lengths. For example, there is a type of ayu fishing rod that allows you to change the overall length by replacing the base rod body of a rod of different lengths. There are also inexpensive telescopic rods that allow you to change the length of the entire ayu rod by replacing the third rod from the tip (rod number 3), which has a different length. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-105125 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the above-mentioned conventional telescopic rods with adjustable length have the following problems. That is, in the case of a telescopic rod in which the butt rod body is replaced, the butt rod body does not affect the flex of the entire rod, so a relatively large change in length is possible, but since it is a part that involves the grip, there is the problem that it is expensive. Also, if the butt rod body is replaced with a shorter one, the rod bodies cannot be stored inside the butt rod body. Conversely, if the butt rod body is replaced with a longer one, not only does it become inconvenient to carry, but there is also the major problem that the rod bodies are not fixed inside the butt rod body when stored, so they move around and rub against each other, causing scratches and resulting in damage (breakage).

[0006] In addition, in the case of telescopic rods where the overall length of the rod can be changed by replacing the third rod from the tip (rod no. 3), it is difficult to change the length, and the flexibility of the rod changes, causing discomfort to the user, so there is room for improvement in this regard.

[0007] The present invention has been made in consideration of the above circumstances, and its purpose is to provide a telescopic rod and a replacement rod body that can be used by changing the rod length to suit fishing conditions while suppressing increases in cost and without changing the fishing feel of the user. [Means for solving the problem]

[0008] (1) The telescopic rod of the present invention comprises a base rod body having a butt end, and a plurality of rod bodies which are successively telescopically extended from the base rod body and engage with each other, and at least one of the plurality of rod bodies is a first replacement rod body which is replaceable with a second replacement rod body of a different length from the first replacement rod body, and is characterized in that when the first replacement rod body is attached and a constant load is applied while the rod is held at a constant angle, the inclination of the imaginary line connecting the butt end and the tip is the same when the first replacement rod body is attached and when the second replacement rod body is attached.

[0009] According to the telescopic rod of the present invention, the rod body closest to the base rod body is the first replacement rod body, and the first replacement rod body can be replaced with a second replacement rod body of a different length from the first replacement rod body, so the overall length of the rod can be changed and used to suit fishing conditions such as fishing style and obstacles. In addition, in this case, the cost increase can be suppressed because the costly base rod body, which has a grip and a butt end portion, is not replaced.

[0010] Furthermore, in the present invention, when the first replacement rod body is attached and when a constant load is applied while the rod is held at a constant angle, the inclination of the imaginary line connecting the butt end and the tip is the same when the first replacement rod body is attached and when the second replacement rod body is attached. In other words, by positioning the replacement rod body close to the base rod body, the effect of flex can be reduced regardless of the difference in length between the first replacement rod body and the second replacement rod body. Therefore, a decrease in rod operability and fishing feel can be suppressed. In this way, in the present invention, the difference in length between the first replacement rod body and the second replacement rod body can be increased, thereby expanding the range of fishing conditions.

[0011] (2) It is preferable that the fishing rod has a base rod body having a butt end, and a plurality of rod bodies which are successively swung out from the base rod body and engage with each other, and that the plurality of rod bodies have at least one first replacement rod body provided on the side of the base rod body, and that the first replacement rod body is provided so as to be replaceable with a second replacement rod body of a different length from the first replacement rod body.

[0012] According to the telescopic rod of the present invention, at least one first replacement rod body provided on the base rod body side can be replaced with a second replacement rod body of a different length from the first replacement rod body, so that the overall length of the rod can be changed to suit fishing conditions such as fishing style and obstacles. In addition, in this case, the base rod body, which is more expensive than other rod bodies having components such as a grip and a rod butt, is not replaced, so an increase in costs can be suppressed.

[0013] Furthermore, in the present invention, by positioning the replacement rod body close to the base rod body, the influence of flexing can be reduced regardless of the difference in length between the first replacement rod body and the second replacement rod body. Therefore, it is possible to prevent a decrease in rod operability and fishing feel. In this way, in the present invention, the difference in length between the first replacement rod body and the second replacement rod body can be increased, thereby expanding the range of fishing conditions.

[0014] (3) The plurality of rod bodies may be characterized by including at least five rod bodies.

[0015] (4) The first replacement rod body and the second replacement rod body may be upper base rods that engage with the base rod body when the rod is extended.

[0016] In this case, the upper base rod that engages with the base rod body becomes the first replacement rod body, so the effect of bending can be more reliably reduced regardless of the difference in length between the first replacement rod body and the second replacement rod body as described above, and the deterioration of rod operability and fishing feel can be more significantly suppressed.

[0017] (5) The replacement rod body according to the present invention is characterized in that it is replaceable with the first replacement rod body of the telescopic rod described in any one of (1) to (4). [Effects of the Invention]

[0018] Telescopic rod according to the present invention According to The rod length can be changed to suit the fishing conditions without changing the fishing feel of the user, while suppressing an increase in cost. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a side view showing the overall configuration of an ayu fishing rod according to an embodiment of the present invention. [Figure 2] FIG. 2 is a side view of the sweetfish rod shown in FIG. 1, with the base rod body, each rod body, and replacement rod body separated. [Figure 3]2A and 2B are enlarged views of the base rod body side of the sweetfish rod shown in FIG. 1, where (a) is a view with the first replacement rod body attached, and (b) is a view with the second replacement rod body attached. [Figure 4] This is a diagram showing the section (rod body) that shortens the rod length and the change in hardness rank H. [Figure 5] FIG. 10 is a diagram showing the state of hardness rank H when a constant load is applied while the rod is held at a constant angle with and without a replacement rod body according to the embodiment. [Figure 6] FIG. 10 is a diagram showing the state of hardness rank H when a constant load is applied while the rod is held at a constant angle with and without a replacement rod body according to a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0020] The following is a telescopic rod according to the present invention. of The embodiments will be described with reference to the drawings. In each drawing, the scale of each component may be changed as necessary to make the component large enough to be visible.

[0021] As shown in Figures 1 and 2, the telescopic rod 1 of this embodiment is a sweetfish fishing rod with a total of seven joints, including the base rod, and a total length of 8 to 10 meters. The telescopic rod 1 is made up of multiple hollow tubular rod bodies joined together in a telescopic fashion. The telescopic rod 1 is made of fiber-reinforced resin that uses reinforcing fibers such as carbon fiber. It is preferable that the number of joints in the telescopic rod 1 is six or more, as will be described later.

[0022] The telescopic rod 1 has a base rod body 10 having a butt end portion 10a where a grip is formed, and a plurality of (six in this case) rod bodies 11 to 16 that are successively telescopically extended from the base rod body 10 and engage with each other. That is, the rod bodies 11 to 16 are, in order from the base rod body side to the tip side, the first rod body (hereinafter referred to as the base rod 11), the second rod body 12, the third rod body 13, the fourth rod body 14, the fifth rod body 15, and the sixth rod body (hereinafter referred to as the tip rod 16). In this embodiment, six rod bodies 11 to 16 are provided, but it is preferable that at least five rod bodies (in the case of five rod bodies, six including the base rod body 10) are provided.

[0023] Each rod body 11 to 16 is joined so that the rod body on the tip side can be extended and retracted from the tip of the rod body located on the rod base side. In other words, before telescoping, all of the rod bodies 11 to 16 are housed inside the base rod body 10 in the telescoping rod 1, and when telescoping, the rod bodies 11 to 16 are swung out and the ends of each rod body engage with each other.

[0024] In each of the rod bodies 11-16, the outer circumferential surface of the engaging male part 1a at the butt end is larger in diameter than the inner circumferential surface of the engaging female part 1b at the tip end of the rod body next to it. That is, the inner diameter of each of the rod bodies 11-16 gradually decreases from the butt end toward the tip end. Furthermore, the outer diameters of the butt rod body 10 and each of the rod bodies 11-16 are not tapered but rather have a constant straight shape overall. As a result, when the telescopic rod 1 is extended during use, the engaging male part 1a engages with the engaging female part 1b of each rod body, maintaining a predetermined exposed length protruding from the butt rod body 10 toward the tip end. A fishing line tying part (not shown) for tying a fishing line is provided at the tip of the tip rod 16 (the end on the tip side, tip 10b).

[0025] The base rod 11 is the second rod body from the rod base side, and is telescopically joined to the first base rod body 10. As shown in Figures 3(a) and (b), the base rod 11 of this embodiment has a first replacement rod body 11A and a second replacement rod body 11B (replacement rod body) that is provided so as to be replaceable with the first replacement rod body 11A and is, for example, 800 mm shorter in length than the first replacement rod body 11A. The first replacement rod body 11A and the second replacement rod body 11B engage with the base rod body 10 when telescoping.

[0026] The lengths of the first replacement rod body 11A and the second replacement rod body 11B can be set arbitrarily, and are not limited to the length of the second replacement rod body 11B being 800 mm shorter than the first replacement rod body 11A, as mentioned above. Furthermore, in this embodiment, one second replacement rod body 11B of one length is used, but this is not limited to this, and the second replacement rod body 11B may be multiple rod bodies of multiple lengths.

[0027] FIG. 4 shows the change in the hardness rank H and the section (rod body) where the rod length is cut shorter in the telescopic rod of this embodiment. In Figure 4, the horizontal axis shows sections (rod bodies) where the length of the rod body is shortened (cut) and rod bodies without cuts, and the vertical axis shows the hardness rank H. Here, the hardness rank H is an index that shows the height of the tip when the rod is held at a certain angle and a certain load is applied. The hardness rank H of the uncut rod body, which is used to compare the hardness rank H of each cut rod body, is approximately 2.55, and this is set as the standard hardness rank H0. In contrast, when the sixth rod body (tip rod 16) is cut, the hardness rank H is approximately 3.15, which is a change of approximately 0.7 from the standard hardness rank H0, making it harder. Similarly, when the fifth rod body 15, fourth rod body 14, third rod body 13, second rod body 12, and first rod body (butt rod 11) are cut, the change in hardness rank H from the standard hardness rank H0 at the butt rod body 10 is, in that order, approximately 0.65, approximately 0.35, approximately 0.2, approximately 0.1, approximately 0.05, and approximately 0. In other words, the more rod bodies on the butt rod side are cut, the smaller the change in hardness rank H becomes. For this reason, if the overall length of the ayu rod is changed by cutting the rod body at the tip end (for example, the third rod from the tip (rod number 3)), as in the conventional example, the hardness rank H changes significantly, but as in this embodiment, even if the length of the base rod 11 is changed, the change in hardness is small, and the first replacement rod body 11A is effective as a replacement rod.

[0028] Figure 5 is a diagram showing the state of a telescopic rod 1 when the first replacement rod body 11A and the second replacement rod body 11B are attached, with the rod held at a certain angle and a certain load being applied. In Figure 5, the horizontal axis represents the horizontal length, the vertical axis represents the vertical length, and the scale represents a predetermined unit length (α). In Figure 5, the butt of the telescopic rod 1 is at position 0 on the horizontal axis.

[0029] As shown in Figure 5, the bending state of the telescopic rod 1 in this embodiment is shown when a first replacement rod body 11A is attached and when a second replacement rod body 11B is attached, and when a certain load is applied while the rod is held at a certain angle. Here, the solid line in Figure 5 shows the bending state of the first telescopic rod designated by the symbol 1A, and the black circles on this solid line indicate the joints between the rod bodies. Also, the dashed line in Figure 5 shows the bending state of the second telescopic rod designated by the symbol 1B, and the white circles (open circles) on this dashed line indicate the joints between the rod bodies. Note that overlapping points between the solid black circle and the dashed white circle are indicated by black circles. This shows that the slope of the imaginary line K connecting the butt end 10a and the tip 10b is the same. In other words, this means that there is little change in the stiffness rank H, and in this example, it shows that the stiffness rank H is essentially the same. As can be seen from the difference in the positions of the black and white circles in Figure 5, an example is shown in which the second replacement rod body 11B is shorter (for example, 300 mm shorter) than the first replacement rod body 11A in the second base rod 11 from the base side. Here, the inclination of the imaginary line K being "same" includes slight vertical errors and slight changes due to the usage and storage conditions of the telescopic rod 1, and these variations are taken into consideration. Note that "the inclination of the imaginary line being the same" in this invention means the "same" as mentioned above.

[0030] In the case of the first telescopic rod 1A equipped with the first replacement rod body 11A and the case of the second telescopic rod 1B equipped with the second replacement rod body 11B, the state of rod flex is almost the same between α and approximately 4α in horizontal length, that is, from the base rod body 10 to the third rod body 13 (the fourth rod from the base side). Then, from the fourth rod body 14 toward the tip side, the second telescopic rod 1B bends slightly more than the first telescopic rod 1A, but as mentioned above, the inclination of the imaginary line K is the same for the first telescopic rod 1A and the second telescopic rod 1B. In other words, the hardness rank H of the first telescopic rod 1A and the second telescopic rod 1B are the same.

[0031] Figure 6 shows a comparative example using a telescopic rod with a replaceable position different from that of the embodiment, and shows the state before replacement (solid line in Figure 6) and when a shorter replacement rod body is attached (dashed line in Figure 6) with the rod held at a certain angle and a certain load applied. As shown in FIG. 6, the telescopic rod of the comparative example, like the present embodiment, consists of a total of seven rod bodies, and the replacement rod body is located at the third rod body from the tip side (corresponding to the fourth rod body, which is the fifth from the butt side). In FIG. 6, the black circles on the solid line showing the state before replacement indicate the joints of the rod bodies. Furthermore, the white circles (open circles) on the dashed line showing the state with the shorter replacement rod body attached indicate the joints of the rod bodies. In the comparative example, when a fixed load is applied while the rod is held at a fixed angle, the inclinations of the imaginary lines K1 and K2 connecting the butt end and the tip of each rod change between the case before replacement (solid line in FIG. 6, third telescopic rod designated by symbol 1C) and the case after replacement with a shorter replacement rod body (dashed line in FIG. 6, fourth telescopic rod designated by symbol 1D). Note that in the comparative example, the replacement rod body is 300 mm shorter than the rod body before replacement in the third telescopic rod.

[0032] As described above, the third telescopic rod 1C and the fourth telescopic rod 1D have almost the same flex state in the horizontal length range of α to approximately 2α, that is, from the base rod body 10 to the base rod 11 (the second rod from the base), but the fourth telescopic rod 1D has a different flex state compared to the third telescopic rod 1C from the second rod body 12 to the tip. Furthermore, in the case of the comparative example, the inclination of the imaginary line K1 of the third telescopic rod 1C and the imaginary line K2 of the fourth telescopic rod 1D is significantly different. This means that the stiffness rank H of the third telescopic rod 1C and the fourth telescopic rod 1D are significantly different, which is a factor in causing discomfort to the user.

[0033] Next, the operation of the telescopic rod 1 and replacement rod body configured as described above will be described in detail with reference to the drawings.

[0034] 1 and 2, in this embodiment, the base rod 11 closest to the base rod body 10 is the first replacement rod body 11A, and since the first replacement rod body 11A can be replaced with a second replacement rod body 11B of a different length from the first replacement rod body 11A, the overall length of the rod can be changed to suit fishing conditions such as fishing style and obstacles. For example, in an open river where there are no obstacles such as power lines, bridge girders, or trees, a long telescopic rod with the first replacement rod body 11A attached to the base rod 11 can be used, and in places where there are obstacles, a short telescopic rod with the second replacement rod body 11B attached can be used. In addition, in this case, the cost increase can be suppressed because the costly base rod body 10 having the rod butt end portion 10a such as the grip and butt is not replaced.

[0035] Furthermore, in this embodiment, as shown in Figure 4, when the first replacement rod body 11A is attached and when the second replacement rod body 11B is attached, when a certain load is applied while the rod is held at a certain angle, the inclination of the imaginary line K connecting the rod butt end 10a and the tip is the same. In other words, by positioning the replacement rod body close to the base rod body 10, the effect of flexing can be reduced regardless of the difference in length between the first replacement rod body 11A and the second replacement rod body 11B. Therefore, it is possible to prevent a decrease in rod operability and fishing feel. In this way, in this embodiment, the difference in length between the first replacement rod body 11A and the second replacement rod body 11B can be increased, thereby widening the range of fishing conditions.

[0036] Furthermore, in this embodiment, since the base upper rod 11 that engages with the base rod body 10 is the first replacement rod body 11A, the effect of flexing can be more reliably reduced regardless of the difference in length between the first replacement rod body 11A and the second replacement rod body 11B as described above, and the deterioration of the rod's operability and fishing feel can be more significantly suppressed.

[0037] The telescopic rod and replacement rod body according to the embodiment configured as described above can be used by changing the rod length to suit the fishing conditions, while suppressing increases in cost and without changing the fishing feel of the user.

[0038] The above describes embodiments of the telescopic fishing rod and replacement fishing rod body according to the present invention, but these embodiments are presented as examples and are not intended to limit the scope of the invention. The embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. The embodiments and their modifications include, for example, those that can be easily imagined by a person skilled in the art, those that are substantially the same, and those that are equivalent.

[0039] For example, in this embodiment, at least one first replacement rod body 11A among the multiple rod bodies is provided so as to be replaceable with a second replacement rod body 11B of a different length from the first replacement rod body 11A, and when a fixed load is applied with the rod held at a fixed angle, the inclination of the imaginary line K connecting the rod butt end 10a and the tip is the same when the first replacement rod body 11A is attached and when the second replacement rod body 11B is attached, and the multiple rod bodies are provided on the base rod body 10 side, have at least one first replacement rod body 11A, and the first replacement rod body 11A is provided so as to be replaceable with a second replacement rod body 11B of a different length from the first replacement rod body 11A, but the present invention is not limited to these configuration conditions. In other words, the object of the present invention can be achieved by satisfying either the first or second configuration condition.

[0040] For example, in this embodiment, the telescopic rod 1 is made up of a total of seven rod bodies, of which the upper rod 11 is the replacement rod body, but if the telescopic rod has a total of seven rod bodies, it is also possible to use the second rod body 12 (the third from the base rod side) provided on the base rod body 10 side as the replacement rod body. The number of sections (joints) of the telescopic rod is not limited to seven as in this embodiment, and may be eight or more.

[0041] The phrase "installed on the butt rod body side" as used in claim 2 of the present invention is defined as including the upper butt rod to the central rod body when the total number of telescopic rods 1 is an odd number (e.g., 7, 9, etc.), and including half of the rod bodies on the butt rod side of the total number of rods, excluding the butt rod body, when the total number of rods is an even number (e.g., 6, 8, etc.). For example, in the case of an odd number of seven joints including a butt rod (butt rod body 10, upper butt rod 11, second rod body 12, third rod body 13, fourth rod body 14, fifth rod body 15, tip rod 16) as in the above-mentioned embodiment, the upper butt rod 11, second rod body 12, and third rod body 13 correspond to "provided on the butt rod body side" as set forth in claim 2 of the present invention. Also, for example, in the case of an even number of eight joints including a butt rod (butt rod body 10, upper butt rod 11, second rod body 12, third rod body 13, fourth rod body 14, fifth rod body 15, sixth rod body 16, tip rod 17), the upper butt rod 11, second rod body 12, third rod body 13, and fourth rod body 14 correspond to "provided on the butt rod body side" as set forth in claim 2 of the present invention. Furthermore, for example, in the case of an even number of six sections including the butt rod (butt rod body 10, butt upper rod 11, second rod body 12, third rod body 13, fourth rod body 14, tip rod 15), the butt upper rod 11 and the second rod body 12 correspond to "provided on the butt rod body side" as defined in claim 2 of the present invention.

[0042] Furthermore, in this embodiment, one of the total number of sections (joints) of the telescopic rod (only the butt rod 11) is used as a replacement rod body, but the number of replacement locations is not limited to one and can be two or more. For example, in a telescopic rod 1 consisting of a total of seven rod bodies as in this embodiment, it is also possible to use two of the butt rod 11 and the second rod body 12 on the tip side as replacement rod bodies, provided that the hardness rank H does not change. More specifically, even if the replacement rod body has two or more steel pipe locations, it is necessary to satisfy either one of the following conditions: the inclination of the imaginary line connecting the butt end and the tip is the same (equivalent) when the first replacement rod body is attached and when the second replacement rod body is attached, and the first replacement rod body is attached to the butt rod body side.

[0043] Furthermore, the shape, length, and material of the telescopic rod can also be set as appropriate. For example, the tip rod 16 may be solid.

[0044] Furthermore, in this embodiment, an Ayu fishing rod is used as an example of a telescopic fishing rod, but the present invention is not limited to Ayu fishing rods and can also be applied to other types of fishing rods such as mountain stream fishing rods. [Explanation of symbols]

[0045] 1 Telescopic Rod 1A First Telescopic Rod 1B 2nd telescopic rod 10 original rod body 10a Rod butt end 10b Tip 11~16 Rod body 11 Genjogan 11A First replacement rod body 11B 2nd replacement rod body K Virtual line

Claims

1. A rod base body having a rod butt end; A plurality of rod bodies that are sequentially swung out from the base rod body and engage with each other, At least one first replacement rod body among the plurality of rod bodies is provided so as to be replaceable with a second replacement rod body having a length different from that of the first replacement rod body, When the first replacement rod body is attached and when the second replacement rod body is attached, the inclination of the imaginary line connecting the butt end and the tip is the same when the rod is held at a certain angle and a certain load is applied.

2. The plurality of rods includes at least five rods. The telescopic fishing rod according to claim 1.

3. 3. A telescopic rod according to claim 1 or 2, wherein the first replacement rod body and the second replacement rod body are upper base rods that engage with the base rod body when telescoping.

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