JP2004229589A - fishing rod - Google Patents

Abstract

The present invention provides a fishing rod for preventing a small-diameter rod tube from being damaged when a small-diameter rod tube is stored in a large-diameter rod tube. The former rod pipe 10 is provided with a gradient converter T protruding inward at an intermediate portion between a small-diameter inner hole formed at one end and a large-diameter inner hole formed at the other end. The gradient rod is formed with a flexible member 16 on the innermost layer.
[Selection diagram] FIG.

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fishing rod, and in particular, includes a large-diameter rod tube for accommodating a small-diameter rod tube, and the large-diameter rod tube has a small-diameter inner hole formed at one end and a large-diameter inner hole formed at the other end. The present invention relates to a fishing rod in which a gradient conversion part protruding inward is formed in an intermediate part between the two parts.
[0002]
[Prior art]
Generally, a rod tube formed by winding a prepreg in which a synthetic resin is impregnated into a reinforcing fiber includes a fishing rod in which the diameter is enlarged from an intermediate portion and a large-diameter grip portion is formed on the rod end side (for example, see Patent Reference 1). In this fishing rod, by reducing the amount of synthetic resin impregnated in the main body prepreg at a portion where the rate of change of the pipe diameter is large, resin flow during heat molding is suppressed, and strength reduction is prevented and weight is reduced.
[0003]
Also, there is a fishing rod in which a large diameter portion is formed by a steep taper portion at the rear of a rod tube portion formed by a gentle taper, and a rod end cap is screwed to the large diameter portion (for example, see Patent Document 2). In this fishing rod, the length and the taper of the rod tube portion and the steep taper portion are set to predetermined sizes, thereby preventing the rear end of the inner rod housed therein from coming into contact with the rod end cap.
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. Hei 9-182547
[Patent Document 2]
Japanese Utility Model Publication No. 4-94967 [0006]
[Problems to be solved by the invention]
However, in a conventional fishing rod, since a portion having a large rate of change in the pipe diameter forms a corner inside the rod pipe, when a rod pipe having a smaller diameter is stored, the rod comes into contact with the corner and comes into contact with the rod. The outer surface of the tube may be damaged. In particular, in the case of a fishing rod in which the diameter and weight of the fishing rod have been pursued, the outer diameter of the original rod is also small, so that it is easy to grip the gripping part on the rod end side or the large diameter part to which the cap stopper cap is screwed. In the case where the rod is formed, such a corner portion makes the rod tube housed therein more easily damaged.
[0007]
The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a fishing rod that prevents an outer surface of a small-diameter rod from being damaged when the small-diameter rod is stored in a large-diameter rod. Aim.
[0008]
[Means for Solving the Problems]
To achieve the above object, according to the present invention, there is provided a large-diameter rod tube for accommodating a small-diameter rod tube, the large-diameter rod tube having a small-diameter inner hole formed at one end and a large-diameter rod formed at the other end. Provided is a fishing rod having a gradient conversion portion formed at an intermediate portion between the inner diameter portion and the inner diameter side, wherein the gradient conversion portion has a flexible member in an innermost layer.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 4 show a large diameter rod tube of a fishing rod according to a preferred embodiment of the present invention.
The large-diameter rod pipe according to the present embodiment is formed as a base rod pipe 10 of a swing-out fishing rod (see FIG. 2) capable of storing a rod pipe 8 having a smaller diameter than this. In this case, the reinforced and bulged fitting portion of the base end portion 8A frictionally engages with the inner periphery of the distal end portion of the original rod tube 10. Further, a rod tube (not shown) having a smaller diameter than this is stored in this middle rod tube 8 in order, and when it is swung out, a long fishing rod is formed.
[0010]
Such a large-diameter original rod tube 10 includes a main body layer 11 formed by winding a fiber-reinforced prepreg (hereinafter, simply referred to as a prepreg) in which a reinforcing fiber is impregnated with a synthetic resin around a cored bar. Such a prepreg preferably uses, for example, carbon fiber or glass fiber as the reinforcing fiber, and as the resin impregnated in the reinforcing fiber, for example, a thermosetting resin such as an epoxy resin, a polyester resin, or a phenol resin is preferable. May be mixed. Usually, the main body layer 11 formed by curing such a prepreg is formed to a hardness of about 8H with a pencil hardness specified in Japanese Industrial Standards.
[0011]
The original rod tube 10 of the present embodiment is, for example, a large-diameter tube having a diameter of 23 to 25 mm from a distal end portion 12 forming a small-diameter inner hole having a diameter of 10 to 20 mm via a steeply inclined portion 14. The hole is smoothly shifted to the rear end portion 16 where the hole is formed, and is generally formed to have a rod diameter corresponding to the tail plug 6 whose size is determined. By providing such a steeply inclined portion 14 at an intermediate portion of the original rod tube 10, for example, a rod end of a fishing rod, which is desired to be reduced in diameter and weight, such as an ayu rod, is increased in diameter to improve grip. In addition to the good quality, it is possible to employ a tail plug 6 having a standard size. The large-diameter portion 16 can be formed with an appropriate gradient as long as it forms a suitable gripping property, and is usually formed at about 20/1000 to 50/1000.
[0012]
As shown in FIG. 1, the gradient changes from a small tip side portion 12 having a small gradient of, for example, about 0.3 / 1000 to 2/1000 to a steeply inclined portion 14 forming a steep gradient of, for example, about 10/100 to 100/1000. The conversion part T protrudes to the inner surface side of the original rod tube 10 to form a corner. When this gradient conversion part T is located on the distal end side from the distal end with respect to the total length L of, for example, about 1350 mm of the original rod tube 10, this gradient conversion part T is housed inside. There is a high possibility that the outer surface of the middle rod tube 8 will be damaged.
[0013]
This is because the inner rod tube 8 accommodated therein moves within the original rod tube 10, and the outer surface of the inner rod tube 8 receives an impact from the gradient conversion part T at that time. When a coating film is formed on the outer surface of the middle rod tube 8, the coating film has a pencil hardness of about H-2H, and is therefore softer than the main body layer 11 of the original rod tube 10. In particular, when the outermost coating film is thin in order to reduce the weight or the like, the scratch may penetrate the coating film and reach the main body of the inner rod tube 8. Further, even in the case of an unpainted middle rod tube 8 whose surface is chemically polished to a pencil hardness of about 8H, scratches may occur due to collision or friction with the gradient conversion part T forming a sharp corner. There is.
[0014]
In addition, when this gradient conversion part T is located on the rear end side from the position of (3/4) L from the front end, the rattling of the middle rod pipe in the former rod pipe is small, and Even so, the possibility that the outer surface of the inner rod 8 is damaged by the bulging base end 8A serving as a support is small. Further, when the gradient of the steeply inclined portion 14 is smaller than 10/10000, since the corner formed on the inner surface is not sharp, even if the gradient conversion portion T is closer to the distal end than the position of (3/4) L from the distal end. Even if it is located, the possibility of damaging the outer surface of the inner rod tube 8 is small.
[0015]
In the present embodiment, the flexible member 16 is disposed on the innermost layer of the gradient conversion portion T that forms a corner that is likely to damage the outer surface of the middle rod tube 8, and the main body layer 11 of the original rod tube 10 and the middle rod tube 8 is prevented from coming into direct contact with the gradient converter T. The flexible member 16 is formed to have a hardness lower than that of the coating film of the middle rod tube 8 as described above, so that the flexible member 16 is not limited to the middle rod tube 8 having the coating film formed on the surface thereof, but is a non-painted surface whose surface is chemically polished. It does not damage the center rod pipe.
[0016]
Before winding the prepreg forming the main body layer 11 of the original rod tube 10 around a core metal (not shown), such a flexible member 16 is provided at a position straddling the above-mentioned gradient converting portion T at about 1000 to 5000 kg / mm ^2. A flexible sheet having a flexural modulus of is directly wound around a cored bar, and various prepregs forming the main body layer 11 are wound thereon. The prepreg forming the main body layer 11 is appropriately wound several times in a state where the fiber direction is aligned in the axial direction, the circumferential direction, or the inclined direction, as usual.
[0017]
Such a flexible member 16 may be wound alone on a cored bar, or may be wound together with a prepreg forming the main body layer 11 in a state of being stacked on a prepreg forming the main body layer 11. In any case, the flexible sheet forming the flexible member 16 has a width of 5 to 50 mm at one end, a width of 5 to 20 mm at the other end opposite thereto, and a length of at least one turn. It is preferable to form it in a shape. Further, the thickness of the flexible sheet is about 0.01 to 0.2 mm, particularly preferably about 0.01 to 0.1 mm. If it is formed thicker than this, there is a high possibility that wrinkles which cause a reduction in strength are formed on the main body layer 11.
[0018]
Then, in the case of actual winding, by winding onto the core metal from the end on the wide side, the winding can be easily performed without forming a step on the inner surface of the original rod tube 10. By forming the flexible sheet into the above-described dimensions, a flexible member 16 having an axial dimension of 5 to 50 mm across the gradient conversion portion T is formed on the inner surface of the original rod tube 10 over the entire circumference.
[0019]
The flexible member 16 is not limited to the flexible sheet as described above, but may have a lower elastic modulus or a lower elastic modulus as long as it can prevent the outer surface of the inner rod tube 8 housed therein from being damaged. In addition to rubber materials such as synthetic rubber or natural rubber having hardness, resin materials such as paints, and other suitable materials such as cloths and woods can be used. When formed of a rubber material, it is preferable to form the rubber with a value of about 50 to 90 degrees.
[0020]
Further, a flexible member 18 is arranged on the innermost layer also at the ball opening B at the tip of the former rod tube 10. The flexible member 18 is shorter than the length of the mating portion of the base end portion 8A of the middle rod tube 8, and when the middle rod tube 8 is shaken, a reliable connection between the middle rod tube 8 and the original rod tube 10 is made. It is preferable to maintain the combined state. The length of the flexible member 18 is preferably in the range of 10 to 35 mm and about 25 mm. Such a flexible member 18 can be formed in the same manner from the same material as the flexible sheet forming the flexible member 16 disposed in the above-mentioned gradient conversion part T, but when the middle rod tube 8 is pulled out or stored. In this case, since a relatively large impact may be applied, it is preferable to form the flexible member 16 with the same hardness or lower hardness.
[0021]
When the flexible member 18 is formed of a flexible sheet as described above, since the gradient is small, the rectangular flexible sheet or the leading edge is orthogonal to the axis of the original rod tube 10 and the rear edge is inclined. It is preferable to form a trapezoidal shape. Also, as for the length, it is sufficient that the length has at least one dimension capable of winding at least once.
[0022]
The original rod tube 10 formed in this way prevents the flexible member 16 of the gradient conversion part T from damaging the outer surface of the central rod tube 8 housed therein, and the flexible member 18 of the ball opening B is provided with the central rod By preventing the outer surface of the tube 8 from being damaged when the tube 8 is pulled out and stored, damage to the surface of the middle rod tube 8 can be prevented for a long period of time while maintaining the lightweight structure of the fishing rod.
[0023]
In particular, in the case of the inner rod tube 8 that has not been subjected to a surface treatment, the spiral unevenness of the tightening tape wound at the time of thermosetting to stabilize the resin of the prepreg remains. Damage caused by this unevenness being cut by the gradient converter T is almost certainly prevented by the flexible member 16 provided in the gradient converter T. Further, not only such irregularities but also damage to the coating film on the surface can be prevented, so that even when a thin coating film is formed, generation of scratches reaching the main body layer is suppressed. Therefore, it is possible to extend the life of the middle rod tube.
[0024]
In the above-described embodiment, the original rod tube 10 of the swing-out type fishing rod has been described. However, even in the case of a joint type fishing rod, for example, a rod tube having a smaller diameter than this is housed inside. It can be applied to any fishing rod. In addition to the original rod tube 10, a small diameter rod tube is alternately housed in two rod tubes of an original rod tube and a rod tube to be joined to the former rod tube, as is commonly called a double rod end. In the case of a fishing rod, the flexible members 16 and 18 described above can be provided on both the original rod tube and the rod tube to be spliced ahead. In this case, it is preferable that the flexible member 18 of the ball opening B is provided at the front end of the rod tube on the storage side. Further, the flexible member 18 of the ball opening B can be omitted.
[0025]
【The invention's effect】
As is apparent from the above, according to the present invention, it is possible to prevent the outer surface of the small diameter rod tube from being damaged when the small diameter rod tube is stored in the large diameter rod tube of the fishing rod.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main rod pipe according to a preferred embodiment of the present invention.
FIG. 2 is a cross-sectional view of a state in which a middle rod pipe is housed in the original rod pipe of FIG.
FIG. 3 is an enlarged cross-sectional view of a gradient conversion unit of the original rod pipe of FIG.
FIG. 4 is an enlarged cross-sectional view of a ball-mouth portion of the original rod tube of FIG. 1;
[Explanation of symbols]
10: original rod tube, 11: body layer, 12: tip side portion, 14: steeply inclined portion, T: gradient conversion portion.

Claims (4)

With a large-diameter rod pipe for storing a small-diameter rod pipe, this large-diameter rod pipe is provided at an intermediate portion between a small-diameter inner hole formed on one end and a large-diameter inner hole formed on the other end. A fishing rod provided with a gradient conversion portion projecting to the inner surface side, wherein the gradient conversion portion has a flexible member in an innermost layer. 2. The fishing rod according to claim 1, wherein the gradient conversion unit is formed in a range of ／ from one end of the large-diameter rod pipe, and the gradient is converted with a magnitude of 10/10000 or more. 3. The fishing rod according to claim 1, wherein the large-diameter rod tube has a flexible member in an innermost layer at the one end. The fishing rod according to claim 3, wherein the flexible member provided on the innermost layer of the one end has a hardness equal to or lower than that of the flexible member provided on the innermost layer of the gradient conversion unit.

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