JP2003009723A - Interline fishing rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interline fishing rod having improved bending balance of a tip rod tube with a middle rod tube joining the tip rod tube and excellent fishing conditions. SOLUTION: This interline fishing rod is provided with the tip rod tube 14 formed by winding a fiber-reinforced prepreg obtained by impregnating reinforcing fibers with a synthetic resin, the middle rod tube 16 shaking out and joining the tip rod tube 14 and a large-diameter rod tube 12 equipped with a fishing line introduction guide 24. Protrusions 30 forming a pitch S2 of 1.0-4.5 mm in the axial direction and extending in the peripheral direction at 0.05-0.28 mm height H2 are formed on the inside of the middle rod tube 16. The average taper on the inside of the middle rod tube 16 is formed in a larger size of >=1.3 times based on the average taper on the inside of the tip rod tube 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow fishing rod, and in particular, a tip rod tube formed by winding a fiber reinforced prepreg in which reinforcing fibers are impregnated with a synthetic resin, and the tip rod tube is shaken out. The present invention relates to a hollow fishing rod having a splicing rod pipe and a large-diameter rod pipe provided with a fishing line introducing portion.

[0002]

2. Description of the Related Art It has been known that a fishing rod for such a hollow fishing rod is provided with a protrusion for guiding the fishing line inside the rod tube.
Some of such protrusions are formed as ridges that extend in a spiral shape at intervals in the axial direction. Such a spiral ridge formed inside the rod pipe reduces the resistance caused by the contact of the fishing line with the inner surface of the rod pipe and water droplets, thereby forming a hollow fishing rod that smoothly guides the fishing line. can do.

[0003]

However, when the projection height of such a projection from the inner surface of the rod tube becomes large, the outer diameter of the rod tube becomes large, and therefore the bending rigidity becomes large. In particular, when the height of the protrusion formed on the inner surface of the middle rod pipe to which the tip rod pipe is spouted and joined is increased, the inner diameter cannot be reduced because the tip rod pipe must be housed. For this reason, the middle rod pipe, which is spliced and spliced with the tip rod pipe, has a considerably large bending rigidity with respect to the tip rod pipe, is less likely to be bent than the tip rod pipe, and therefore becomes a fishing rod having a bad condition. On the other hand, if the height of the projection is reduced, the outer diameter of the rod pipe can be made smaller, but the line resistance increases, and if a water repellent layer is formed inside the rod pipe, the fishing line becomes water repellent. Contact with the layer makes the water repellent layer susceptible to wear.

The present invention has been made under such circumstances, and improves the flexural balance between the tip rod pipe and the middle rod pipe that joins the tip rod pipe, and the middle fishing rod having excellent condition. The purpose is to provide.

[0005]

According to the intermediate fishing rod of the present invention which achieves the above-mentioned object, a tip rod tube formed by winding a fiber reinforced prepreg in which a reinforcing resin is impregnated with a synthetic resin and It has a middle rod pipe for spouting and splicing the tip rod pipe and a large diameter rod pipe provided with a fishing line introducing portion, and an inner space of 1.0 to 4.5 mm is formed inside the middle rod pipe. To form a projecting body extending in the circumferential direction and having a height of 0.05 to 0.28 mm, and the average taper inside the middle rod tube is 1.3 times or more larger than the average taper inside the tip rod tube. It is characterized by having done.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The drawings show a swing-out hollow fishing rod 10 according to a preferred embodiment of the present invention. As shown in the outline of the whole in FIG.
Has a large diameter rod tube 12 which is a former rod tube provided with a grip portion 12a and a bottom plug 12b on the rod end side, and has a tip rod pipe 14 on the tip side, and from this tip rod pipe 14 to the rod end Side to side first, second,
It is formed by joining the third middle rod tubes 16, 18, and 20. These tip rod tube 14 and each middle rod tube 16, 18, 2
0 is each joining part P1-P4 of a base end outer peripheral surface and a tip inner peripheral surface.
It is a drawing structure that is spliced in and is housed in the large diameter rod tube 12. Each of these rod tubes is formed by winding a fiber reinforced prepreg (FRP) in which reinforcing fibers are impregnated with a synthetic resin around a core metal, and then performing ordinary steps such as curing and decoreing.

The number of middle rods between the large diameter rod 12 and the tip rod 14 is not limited to the above three. Further, for example, the second and third middle rod pipes may be omitted, and the first middle rod pipe 16 may be joined to the large diameter rod pipe 12, and the large diameter rod pipe 12 and the third middle rod pipe 20 may be connected. A parallel joint structure may be partially used, such as a parallel joint. Further, the shape of the grip portion 12a and the like formed on the large-diameter rod tube 12 is not limited to that shown in the drawing, and may be omitted. Furthermore, it is also possible to provide a former rod pipe behind the large diameter rod pipe 12.

The large-diameter rod pipe 12 of this embodiment is provided with a reel sheet 22 for fixing various reels, and a fishing line introducing portion for introducing fishing line extending from the reel into the rod pipe from the side on the tip end side. The fishing line introduction guide 24 is attached by a known fixing means such as a spool.

The fishing line introducing guide 24 of the present embodiment is provided close to the rear side (bottom plug 12b side) of the joint P4 between the large diameter rod pipe 12 and the third middle rod pipe 20, 3 middle rod 2
When 0 is spouted and joined from the large diameter rod pipe 12, the plug body 26 (see FIG. 2) provided on the proximal end side of the third middle rod pipe 20 is positioned close to the fishing line introduction guide 24. This facilitates the threading operation.

The fishing line introducing guide 24 is a ring 24.
a frame body 24b having a and a guide hole 24c provided in a long hole 12c formed on the side surface of the large diameter rod pipe 12 for guiding the fishing line (see FIG. 2), or a rod formed in a pipe shape. For guiding the fishing line to the hollow inside of the pipe (not shown)
Various types such as the above can be applied, and the structure thereof is not limited. Further, the fishing line introduction guide 24 may be provided, for example, on the third middle rod pipe 20 instead of the large diameter rod pipe 12.

FIG. 2 shows a hollow fishing rod similar to that shown in FIG. 1, in which three middle rod pipes 16, 18, 20 are spliced between a large diameter rod pipe 12 and a tip rod pipe 14. The combined fishing rod 10 is shown. In this figure, the large diameter rod tube 12 and the third middle rod tube 2 are shown.
0 and the second middle rod pipe 18, the first middle rod pipe 1
6 shows a state in which 6 and the tip rod tube 14 are housed in the large diameter rod tube 12. A guide 30 (protruding body) extending in the circumferential direction projects from the inner peripheral surface of each of the middle rod tube and the tip rod tube, and is extended along the circumferential direction in a spiral shape or a ring shape.

The protrusion 30 is preferably formed of a wear-resistant material, and examples of wear-resistant materials that can be used include fiber-reinforced resins made of ceramic fibers, carbon fibers, glass fibers, etc. Examples include fibers using organic fibers such as PET, aramid, PTFE, and PE, synthetic resin films, yarns, and ceramic materials (ring-shaped). In addition, the protrusion 30 is preferably formed in a mountain shape having a convex curved surface shape or a semicircular cross-sectional shape, and may be formed in, for example, a trapezoidal shape or an uneven shape in which a concave portion is formed in the top portion. Whatever the cross-sectional shape, the fishing line can be in various shapes capable of making point contact with the top of the projecting body 30 and reducing the contact area. Extend along the circumference. It is preferable that the protrusion 30 is formed as a continuous ridge in the same rod pipe, but it is not necessarily required to be continuous as long as the line resistance of the fishing line can be reduced. Good.

The inner peripheral surface of the joint portion between the rod pipes is formed in a smooth shape without forming the above-mentioned protruding body, whereby the joint dimension is stable and backlash and knot drop are prevented. can do. Further, in the illustrated embodiment, since the fishing line introducing guide 24 is provided at the tip of the large diameter rod pipe 12, no projecting member is formed inside the large diameter rod pipe 12, but the fishing line introducing guide 24 is used. When it is provided on the base side of the large-diameter rod pipe 12, a protrusion may be formed inside it.

A plug 26 is removably disposed by screwing or the like on the base portion of the third middle rod pipe 20 joined to the large diameter rod pipe 12 by spouting, that is, the inner peripheral portion of the rear end. The plug 26 is provided with a fishing line (threading tool) inserted from the fishing line introducing guide 24 at the rear end opening hole of the tip rod tube 14 (at the rear end opening hole thereof, as shown in FIG. The fishing line guide hole 26a is formed so that the guide ring 36 made of a wearable material can be easily guided. It is preferable that the fishing line guide hole 26a is formed by an inclined surface whose diameter is gradually reduced toward the tip side, and a guide ring 26b made of an abrasion resistant material is arranged at the smallest diameter portion.

The top guide 2 is attached to the tip of the tip rod tube 14.
8 is detachably provided. This Top Guide 28
A guide ring 28a for guiding the fishing line is attached to the tip end side, and the base end side is detachably attached to the tip rod tube 14 via a fixed tube 28b (see FIG. 2) fixed to the tip of the tip rod tube 14. It is preferably formed. In this way, the top guide 28
By forming the above, the yarn resistance can be reduced, and by forming the top guide 28 large, it is possible to further reduce the yarn resistance. In addition, the tip rod tube 14 is a large diameter rod tube 1
It can be pulled out from the second bottom plug 12b portion, which facilitates maintenance.

The maximum diameter of such a top guide 28 is
The inner diameter of the first middle rod pipe 16 is larger than the inner diameter on the tip side, and when the tip rod pipe 14 is housed in the first middle rod pipe 16, the top guide 28 protrudes to facilitate the operation for taking in and out. ing. In addition, the maximum diameter of the fixed tube 28b is formed smaller than the inner diameter of the tip of the first middle rod tube 16, and the top guide 28 is removed so that the tip rod tube 14 is moved to the first position.
It can be pulled out from the original side, that is, the rear side of the middle rod pipe 16. Therefore, the tip rod tube 14 and the middle rod tube 1 through which the fishing line is inserted
The inside of 6, 18, 20 can be easily maintained.

The length of the tip rod tube 14 is 50 to 160 cm.
The degree is about 80 to 140 cm in the case of rock rods and boat rods. Further, the average inner taper from the tip to the rear end in the inner circumference of the tip rod tube 14 is 0.1 / 1000.
~ 0.5 / 1000 is the best, 3.0 / 10
Within the range of 00 or less, 0.1 / 1000 to 0.6 / 10
It is preferably 00, and may be 2.0 / 1000 or 1.5 / 1000 to 0.1 / 1000.
By making the inside of the tip rod tube 14 such a gentle taper or a straight shape, the inner diameter of the tip side can be relatively increased and the guideability of the fishing line can be improved.

The tip portion (the rear portion of the top guide 28) 14A of the tip rod tube 14, the original side portion 14B adjacent to the tip of the joint portion P1, and the first middle rod tube for joining the tip rod tube. 16
The bending rigidity of each rod tube main body with the front side portion 16A adjacent to the rear of the joining portion P1 is set as follows (in this case, the bending rigidity is for joining portions and parts). Is determined by the rigidity of the main body prepreg excluding the reinforcing prepreg).

When the bending rigidity of the base side portion 14B of the tip rod tube 14 is G1 and the bending rigidity of the tip portion 14A is G0,
G1 is 10 times or more of G0, preferably 20 times or more and 40
Double or less. The bending rigidity G2 of the tip side portion 16A of the first middle rod tube 16 is 0.5 times or more and 1.7 times or less (0.5 ≦ G2) of the bending rigidity G1 of the base side portion 14B of the tip rod tube 14. /
G1 ≦ 1.7), preferably about 0.6 to 1.2 times. With such a rigidity ratio, the tip rod tube 14
The tip region of the rod tube is easily bent, and the rigidity difference between the front and rear rod tubes in the joint portion P1 is not so large, so that the bending balance between both rod tubes can be improved. In particular, G2 /
When G1 ≤ 1.7, the difference in rigidity is small and the deflection balance is improved, and when 0.5 ≤ G2 / G1 <1, the curve bend to the front of the joint (the side of the tip rod tube 14). The balance of the flexure can be transferred to the rear part of the joint (the front side part of the middle rod tube 16) without any change, and the overall flexion balance is improved.

When the above-mentioned structure is applied to the rod, the bending rigidity of the tip portion 14A of the tip rod tube is 20 × 10 ^{3 to} 40 × 1.
0 ³ N · mm ² and bending rigidity of the base side portion 14B is 500
x10 ^{3 to} 700x10 ³ N · mm ² or so, and the bending rigidity of the front side portion 16A of the first middle rod tube is 400 × 10 ^{3 to} 1000.
A main body prepreg of about x10 ³ N · mm ² is used.

FIG. 3 shows an engaging portion P1 in which the tip rod tube 14 and the first middle rod tube 16 are engaged, and FIG. 4 shows an enlarged rod tube body of the tip rod tube 14. As shown, the tip rod tube 14
The main body layer 34 has a three-layer structure including an inner layer 34a, an intermediate layer 34b, and an outer layer 34c. Inner layer 34a and outer layer 34
c is a circumferential fiber layer of a reinforcing fiber layer, a scrim cloth layer (woven fabric layer) or an axial fiber layer, or a combination thereof, and the intermediate layer 34b is mainly composed of an axial fiber layer or an inclined fiber layer. Formed by the layers.

As described above, the inner peripheral surface of the rod tube main body is
The projections 30 are formed at a predetermined pitch, and a water-repellent coating (water-repellent layer) 40 made of a water-repellent resin containing fine water-repellent particles is formed thereon. In this case, the material for forming the water repellent layer is arbitrary, but for example, fluororesin or silicone resin can be used. The water-repellent layer 40 may be formed by, for example, a spray coating method, a coating solution injection method, a dipping method (after the application of the coating solution, removing unnecessary portions or masking before injection), a brush coating method, and the like. Forming by winding a film (water-repellent layer formed film) made of a water-repellent material in advance on the outside of the cored bar, winding the FRP prepreg on it, and heat-molding it by a conventional method. Is also possible. Alternatively, it may be formed by using a plating method. The term "water repellency" as used herein means that the contact angle of water droplets is at least 130 degrees or more, preferably 140 degrees or more, and more preferably 150 degrees to 180 degrees, and the water repellency is extremely large. It is meant to include super water repellency.

By forming such a water-repellent layer 40, the fishing line resistance can be reduced and the guideability can be improved, so that the height of the projection 30 can be formed low as follows. Becomes

That is, the protrusion 30 at the tip of the tip side
H1 (height from the surface of the inner layer 34a) is 0.3 m
It is formed to be lower than m and is preferably set in a range of 0.05 to 0.28 mm, preferably 0.1 to 0.27 mm. Further, the width L1 of such a protrusion 30 is set to 0.1 to 0.5 mm, the interval formed in the axial direction, that is, the pitch S1 is set to 1.0 to 4.5 mm, and its cross-sectional shape is as described above. In addition, it is formed in a convex curved surface shape that reduces the contact area with the fishing line.

The water-repellent layer 40 is formed on the surface of the protrusion 30.
In addition, it is preferable to form over the region between the protrusions 30, and the thickness thereof is set to be smaller than the height of the protrusions 30. In this case, the water-repellent layer 40 has an average thickness of 1
˜20 μm, preferably 7 μm or less.

The water-repellent layer 40 is the thinnest at the top 30a of the protrusion 30 as shown in FIG. 4 in consideration of the wear of the fishing line, the drainage of the fishing rod when the rod is tilted, etc.
0b is the thickest, and the gaps 34d between the protrusions 30 are preferably formed to have an average thickness.

Such a water-repellent layer 40 prevents water droplets from adhering to the inside of the rod tube body, and passes through the hollow portion inside the rod tube even when the height of the projection 30 is formed low. The resistance of the running fishing line is small, and the fishing line can be smoothly guided. As a result, the inner diameter at the tip of the tip rod tube 14 (the protrusion 3
(Measured at the top portion 30a of 0) can be increased. Specifically, the inner diameter at the tip of the tip rod tube 14 is formed to be 1.65 mm or more and 2.00 mm or less.

Further, by lowering the height of the protrusions 30 and making the inner diameter larger than 1.65 mm, the fishing line can be smoothly guided even if there is a tack on the tackle or a knot of the thread. It is possible to prevent damage to the tip rod tube 14.
Further, since the height of the projection 30 is formed lower than the inner diameter, the tip outer diameter of the tip rod tube 14 can be made smaller, and the bending rigidity of the tip portion of the tip rod tube can be reduced to facilitate bending. A fishing rod having a flexible tip rod tube can be obtained. In this case, the outer diameter dimension at the tip of the tip rod tube 14 is 2.
It is preferable that the length is 9 mm or less. By using the tip rod tube having such an outer diameter, it is possible to obtain a more flexible tone.

Further, in the above construction, the tip rod tube 14
The thickness T1 of the main body layer 34 at the tip of is preferably less than or equal to the height H1 of the protrusion 30. By doing so, the body layer 34 at the tip of the tip rod tube becomes thin, and the tone can be made even more flexible.

The first middle rod pipe 16 which oscillates and splices the tip rod rod 14 as described above is provided with an inner reinforcing layer 50 and an outer reinforcing layer 52 at the portion forming the joint P1. These reinforcing layers 50 and 52 are formed by winding one layer or a plurality of layers of reinforcing prepregs in which reinforcing fibers are arranged in the circumferential direction or the inclined direction, and suppress the increase in bending rigidity and at the joint P1. The strength of the first middle rod tube 16 is improved. When the reinforcing prepreg is wound in a plurality of layers, it is preferable to wind the reinforcing prepreg in the direction in which the fiber directions intersect. The outer reinforcing layer 52 may be projected from the main body layer instead of being formed so as to be flush with the outer peripheral surface of the main body layer as shown in FIG. The inner peripheral surface of the joint P1 may be formed as a tapered surface by reducing the thickness of the inner reinforcing layer 50 toward the tip. This improves the flexure connection with the previous section.

Then, from the portion adjacent to the rear edge portion of the inner reinforcing layer 50, the protrusion 30 similar to the above is formed. That is, the height H2 (height from the surface of the main body layer) of the protrusion 30 formed inside the middle rod tube 16 is lower than 0.3 mm, preferably in the range of 0.05 to 0.28 mm. Is preferably set in the range of 0.1 to 0.27 mm.
Further, the width L2 of such a protrusion 30 is 0.5 to 1.0.
mm, the interval formed in the axial direction, that is, the pitch S2 is 1.
It is set to 0 to 5.0 mm, preferably 1.0 to 4.5 mm, and its cross-sectional shape is formed so that the contact area with the fishing line becomes small as described above. The height of the protrusions 30 is preferably set so that the fishing line does not come into contact with the inner surface of the main body layer in relation to the pitch. For example, the height H2 is 0.2
When the pitch S2 is set to 4.5 mm, preferably 3.5 mm when it is 8 mm, the fishing line is prevented from being caught in the gap between the protrusions 30, and thus the line resistance of the fishing line can be reduced. On the other hand, if the height H2 is lower than 0.05 mm, the pitch S2 must be set to an extremely small value, in which case the entire contact area becomes large and the yarn resistance cannot be reduced. Therefore, it is preferable to set the height H2 and the pitch S2 of the protrusions 30 to the above values.

In the present embodiment, the inner diameter D1 formed by the top portion of the protrusion 30 at the tip side portion 16A of the first middle rod tube 16 is formed to have a size that allows the tip rod tube 14 to be inserted, and this inner diameter D1 and the main body. The difference from the inner diameter D0 of the layer is 1.0 mm or less, preferably 0.6 mm or less. Since the diameter difference is small, and thus the tip side portion 16A does not have a large diameter, the bending balance with the tip rod tube 14 can be improved.

The wall thickness T2 of the tip side portion 16A of the first middle rod tube 16 is preferably formed to be equal to or smaller than the wall thickness of the base portion of the tip rod tube 14. In this case, the bending rigidity of the tip side portion 16A is reduced, and the flexural balance with the tip rod tube 14 is improved.

The first middle rod tube 16 has an average taper from the front side portion 16A adjacent to the rear edge portion of the inner reinforcing layer 50 to the rear end except for the engaging portion P1, and the average taper is 0.3 / 1000 to 2 .0 /
It is preferably 1000 / 0.6 to 1000 / 1.5 / 1000. That is, in relation to the average taper inside the tip rod tube 14, the average taper of the first middle rod tube 16 is 1.3 times or more the average taper of the tip rod tube 14 and is 1.
It is preferably formed five times or more. As a result, the outer diameter of the front side portion 16A of the first middle rod tube 16 can be reduced while the outer diameter of the original side of the rear end can be increased, and the tip portion adjacent to the tip rod tube 14 can be easily bent. It has a small bending rigidity and has a large bending rigidity on the original side, and
The middle rod tube 16 can be formed into a rod tube having a soft tone on the tip side and a firm tone on the base side.

The tip rod tube 14 is also provided inside the first middle rod tube 16.
A water repellent layer is formed in the same manner as the water repellent layer 40 formed inside. The water-repellent layer formed on the inside of the first middle rod tube 16 is formed by coating a super water-repellent layer as a film covering the inside of the rod tube and the projecting portion, or by forming only on the inside portion of the rod tube. Good. The water-repellent layer can be formed to have an appropriate thickness as long as it can function as a water-repellent layer that imparts water repellency to the inner surface of the first middle rod tube 16, and forms the rod tube. It is also possible to form them at the same time. In addition, regarding the specific method of forming the water repellent layer, the tip rod tube 1
Materials and methods similar to those described for No. 4 can be appropriately selected.

The water-repellent layer formed inside the first middle rod tube 16 is preferably thicker than the water-repellent layer formed on the tip rod tube 14. Water repellent layer 40 of the tip rod 14
When formed thicker than this, the water repellency of the first middle rod tube 16 can be maintained for a long period of time, and
It is possible to form a fishing rod with good operability by reducing the weight of the tip side to prevent the weight from being carried.

A water-repellent layer may not be formed on the rod pipes that are, for example, the second and third intermediate rod pipes 18 and 20 on the rod butt side of the first intermediate rod pipe 16, although no water repellent layer is formed. 1 By forming a water repellent layer thinner than the middle rod pipe 16, the fishing line resistance over the entire fishing rod can be reduced in a well-balanced manner.

Further, in the present embodiment, as illustrated in FIG. 2, a rod pipe which is, for example, the second and third middle rod pipes 18 and 20 on the rod butt side of the first middle rod pipe 16 as described above. Inside, first
The protrusion 30 having a larger axial gap than the protrusion 30 of the middle rod pipe 16 and having a high height is formed.

According to the above-described embodiment, the tip side portion 16A of the first middle rod tube 16 for spouting and joining the tip rod tube 14 has a height H2 of the projection 30 of 0.05 to 0.28 mm, preferably Is 0.1 to 0.27 mm, the pitch S2 between the protrusions is 1.0 to 4.5 mm, and water repellency is imparted to the inside of the first middle rod pipe 16 to smoothly guide the fishing line. it can. Further, by forming the protrusions 30 densely with such a small pitch S2, it is possible to prevent the water-repellent layer inside the first middle rod pipe 16 from being worn by the fishing line, and to make the water-repellent property long-term. Can be maintained. Further, by reducing the height H2 of the protrusions, it is possible to prevent the outer diameter of the first middle rod pipe 16 from increasing, and to reduce the average taper inside the first middle rod pipe 16 of the tip rod pipe 14. The bending rigidity of the tip side portion 16A of the first middle rod tube adjacent to the first joint portion P1 is made equal to the bending rigidity of the tip rod tube by forming the inner taper at a size 1.3 times or more. It is possible to reduce the difference between the two and to the original side, improve the balance of bending from the tip to the middle rod, and form a medium-through fishing rod having an excellent condition.

In addition, the bending rigidity of the base side of the tip rod tube is set to G1.
When the bending rigidity of the tip side portion of the middle rod pipe adjacent to the joint portion for joining the tip rod pipes is G2, 1.0 ≦ G2
In the case of /G1≦1.7, the difference in bending rigidity between the front side portion 14B of the tip rod tube 14 and the front side portion 16A of the first middle rod tube 16 is reduced to prevent so-called bending. However, the bending balance can be further improved.

Further, inside the tip rod tube 14, a pitch S1 of 1.0 to 4.5 mm is formed in the axial direction to extend in the circumferential direction and the height H1 is 0.05 to 0.28 mm, preferably 0. 1 to 0.27 mm protrusions 30 are formed to give water repellency to the inside of the tip rod tube 14, and the average taper inside the tip rod tube is set to 0.1 / 1000 to 0.6 / 100.
When it is set to 0, the line resistance is reduced, the fishing line is guided more smoothly, the outer diameter is prevented from becoming larger than the inner diameter of the rod tube, and the tip is easily bent. A hollow fishing rod can be formed.

Further, the intermediate rod pipes 18 and 20 are arranged on the rod butt side of the first middle rod pipe and on the tip side of the large diameter rod pipe 12.
The inner side of the rod pipe is formed by forming a protrusion 30 having a height higher than that of the protrusion 30 of the first middle rod pipe 16 and having a high height inside the intermediate rod pipe. It is possible to form a medium-through fishing rod which has a large space and has a high protrusion height 30 for smoothly guiding the fishing line, and which is excellent in fishing line guiding property and condition and has a good balance as a whole.

[0043]

As described above, according to the present invention, the bending balance between the tip rod tube and the middle rod tube joining the tip rod tube is improved, and a middle fishing rod having an excellent condition is formed. be able to.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of a hollow fishing rod according to an embodiment of the present invention.

FIG. 2 is a view showing a state in which the center fishing rod shown in FIG. 1 is housed in a large diameter middle rod pipe with a tip rod pipe.

FIG. 3 is a view showing a spliced state of the tip rod pipe and the middle rod pipe of the hollow fishing rod shown in FIG. 1.

FIG. 4 is a cross-sectional view of a tip rod tube.

[Explanation of symbols]

10 ... Medium fishing rod, 12 ... Large diameter rod pipe, 14 ... Spike rod pipe,
16, 18, 20 ... Middle rod pipe, 24 ... Fishing line introduction guide, 3
0 ... protrusions, 40 ... water repellent layer.

Continued front page    (72) Inventor Eiji Sugaya             3-14-16 Maesawa, Higashi-Kurume City, Tokyo             Within Iwa Seiko Co., Ltd. F-term (reference) 2B019 AA04 BA07

Claims (4)

[Claims] 1. A tip rod pipe formed by winding a fiber reinforced prepreg in which reinforcing fibers are impregnated with a synthetic resin, an intermediate rod pipe for feeding and splicing the tip rod pipe, and a fishing line introducing portion are provided. A medium-through fishing rod having a large diameter rod pipe, wherein the inside rod pipe has an axial interval of 1.0 to 4.5 mm, extends in the circumferential direction, and has a height of 0.05 to 0.2
A medium-through fishing rod, characterized in that a protrusion having a diameter of 8 mm is formed, and an average taper inside the middle rod pipe is formed to be 1.3 times or more larger than an average taper inside the tip rod pipe. 2. The flexural rigidity of the base side of the tip rod tube is G1.
When the bending rigidity of the tip side portion of the middle rod pipe adjacent to the joint portion for joining the tip rod pipes is G2, 0.5 ≦ G2 / G1 ≦ 1.7 The hollow fishing rod according to claim 1. 3. Inside the tip rod tube, 1.0 in the axial direction
To form a protrusion having a height of 0.05 to 0.28 mm and forming a space of about 4.5 mm in the circumferential direction and imparting water repellency to the inside of this tip rod tube, An average taper on the inner side of the rod is set to 0.1 / 1000 to 0.6 / 1000, and the middle fishing rod according to claim 1 or 2 is characterized in that. 4. An intermediate rod pipe is provided on the rod butt side of the intermediate rod pipe and on the tip side of the large diameter rod pipe, and the protrusion of the intermediate rod pipe is provided inside the intermediate rod pipe. The hollow fishing rod according to any one of claims 1 to 3, wherein a protrusion having a larger axial distance than that of the strip and a height higher than that of the strip is formed.