JP2002034394A - Fishing rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the operation of a fishing rod requiring a casting operation for a beginner, etc. SOLUTION: This fishing rod is composed so that the flexural rigidity EI of a region of the fishing rod tip has regions 14E2 and 14E3 suddenly changing and reducing as compared with a change in the flexural rigidity of the fishing rod in the whole rear region thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishing rod which requires a throwing operation, and can be applied to a casting rod which requires a long throwing accuracy, in addition to a casting rod which requires a long casting performance.

[0002]

2. Description of the Related Art Each rod tube of a throwing fishing rod such as a throwing rod which requires long casting performance has an increased bending rigidity as the number of fishing rods increases, that is, as the length of the fishing rod increases.
Even when the tip rods, which are the tip rods, are compared with each other, the bending rigidity is sequentially increased. However, in one tip rod, the ratio of the bending rigidity of the tip to the bending rigidity of the base is about 200 times (about 150 to 250 times).
Times).

[0003]

However, a long and rigid fishing rod is difficult for a fisherman with a certain physical strength or a fisherman who is technically skilled, but for a fisherman with a poor physical strength or a beginner. In some cases, it is impossible to fly a gimmick to a distant place by casting a pole, or cast at an accurate position. The present inventor has found that a fishing rod that requires such a throwing operation can be easily operated even by a beginner or the like by adjusting the bending rigidity of the tip region. Therefore, an object of the present invention is to make it easy for a beginner or the like to operate a fishing rod that requires a throwing operation.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned object, according to the present invention, the bending rigidity of the fishing rod tip region is abruptly changed as compared with the bending rigidity of the fishing rod in the entire rear region thereof. A fishing rod characterized by having a reduced area is provided. Here, the bending rigidity of the fishing rod is examined by drawing the rigidity value on a semilogarithmic graph (drawing the bending rigidity value by logarithm). In addition, local sudden changes in rigidity such as joints and local reinforcements are ignored. Since the bending stiffness of the front region suddenly changes and becomes smaller than the bending stiffness change of the entire rear region, the front region bends more in the early stage of throwing and the height from the angler during the throwing operation. (Length) is the same as that, and it is easy to handle. Also, in the late stage of throwing,
In a state where the fishing rod is held in a predetermined forward direction, the tip region returns slightly snapped and performs a throwing purpose with a slight delay due to the returning action of the bending of the entire fishing rod.

According to the second aspect, in the case of a single rod, the bending rigidity at a position about 30% of the entire length from the tip is about 600 times or more the bending rigidity of the tip of the fishing rod. For the bending rigidity of the tip of the fishing rod, 30
The bending stiffness at the position of about percent is about 600 times or more. In the case of a three-piece rod, the bending stiffness at about 30% of the entire length from the tip to the bending stiffness at the tip of the fishing rod is about 6 times.
In the case of a four-piece rod, the bending rigidity at a position about 25% of the total length from the tip is about 600 times or more the bending rigidity of the tip of the fishing rod, and in the case of a five-piece rod, There is provided a fishing rod characterized in that the bending rigidity at a position about 30% of the entire length from the distal end is about 600 times or more the bending rigidity of the distal end portion. The 30 (25) percent is a position where the position is slightly moved to the tip side and avoided there when the just position is a local sudden change portion of rigidity such as a joint portion or a local reinforcement portion. Means that. The bending stiffness of the tip of the fishing rod is defined as a rod body made of fiber-reinforced synthetic resin (excluding a coating layer if a base or the like of the top guide is attached to the tip, if any). Flexural rigidity. The requirement that the bending stiffness at a position 30 (25) percent from the tip of each fishing rod be about 600 times greater than that at the tip is a feature not found in conventional throwing fishing rods, and is only half that of conventional fishing rods. The bending stiffness is set to about one third, and there is no difference in rigidity as compared with the present application. That is, in the present application, the front region (which may coincide with the spike) is configured to have lower rigidity than the rear region. Therefore, claim 1
The same operation and effect as described above are obtained.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to embodiments shown in the accompanying drawings. FIG. 1 is a side view of a three-joint type fishing rod according to the present invention, in which a former rod 10 and a middle rod 12, and a middle rod 12 and a head rod 14 are joined in a parallel type, respectively. Spinning reel 1 on former pole 10
6 are attached, and an external guide G is attached to the middle rod 12 and the tip rod 14. In the spliced state, the tip of the fishing rod is used as a reference position, the position of the tip of the middle rod is L1, the position of the tip of the former rod is L2, and the position of the rear end of the former rod, that is, the total length is L3 (m). Each of these rods is made of a fiber-reinforced synthetic resin in which a synthetic resin such as a thermosetting resin such as an epoxy resin or another thermoplastic resin is reinforced with a reinforcing fiber such as a carbon fiber, and may be hollow or solid.

FIG. 2 shows the bending rigidity EI (N · m) of the fishing rod of FIG.
The m ²⁾ on the vertical axis of logarithm, which is usually a graph displaying the length position P (m) from the tip to the horizontal axis of the display. Joint 1
Except for 0T and 12T, former rod 10, middle rod 12, head rod 1
In the diagram of the bending stiffness corresponding to No. 4, reference numerals 1
0 ', 12', 14 ', etc. are attached. At the joint portion 10T between the original rod and the middle rod, the bending rigidity is locally high and is 10T ', and at the joint portion 12T between the middle rod and the head rod, the bending rigidity is locally high and is 12T'. The solid lines for these joints indicate that there is no joint for each front rod.
The bending rigidity of only the rear rod is shown.

The bending rigidity of the tip rod 14 is indicated by reference numeral 14 '.
, A solid line portion from the rear end position P3 to the halfway position P2 excluding the spliced portion, and the halfway position P2 to the front end position A
Up to the broken line 14E2 or the dashed line 14E3. Solid line 1 from halfway position P2 to tip position A
4E1 shows the conventional bending stiffness for comparison. Both the broken line 14E2 and the one-dot chain line 14E3 are considerably lower than the conventional bending stiffness 14E1 from the position P2 to the tip position A. In other words, it is configured to be much more flexible than this area of the conventional tip rod.

In the one-dot chain line 14E3, the rate of change in bending stiffness sharply changes at a position P1 between the midway position P2 and the tip position A, and is the highest in the area between the positions P2 and P1. (Decrease rate) is large, and the rate of change between the position P1 and the tip position A is about the same as that of the conventional bending stiffness 14E1. For example, when the bending rigidity of the tip rod of the structure of the present application is a series of the line 14 'and the line 14E2, the rod portion in the region corresponding to the line 14' and the rod portion in the region corresponding to the line 14E2 have different structures. And their joints are immediately behind the position P2, and have locally high bending stiffness 14T 'as shown by the broken line. This joint may not be fixedly joined but may have a structure that can be inserted and removed like a joint of a joint rod.

In the above description, the three fishing rods are used, and the length of each of the three rods 10, 12, and 14 is not extremely different. Is approximately the position P3. If 30
When the position closer to the rear of the percentage is above the joint 12T ', the position P3 immediately before this position is the position B where the bending rigidity is compared with the position of the tip A. If the position 30% backward is on the tip rod before the position P3, the position is set as the comparison position B.

In this example, the total length L3 is 3
The position closer to the rear by 0% is on the joint 12T '. In this case, the position P3 immediately before is the position B where the bending rigidity is compared with the position of the tip A. The bending stiffness EIB at the position B is about 600 times the bending stiffness EIA at the position of the tip A, but is 1% in comparison with the bending stiffness EIJ at the position of the tip A of the conventional tip rod shown by the solid line 14E1.
It is about 50 times.

The bending rigidity lines 14 'and 14E described above
The tip rod 14 corresponding to the series 2 is located at the positions P3 and P
2 is a hollow rod having a structure in which a large number of reinforcing fibers (carbon fibers) are directed in the axial direction, as in a normal rod structure. The area is
One example is a structure in which a solid rod having a joint portion inserted into the hollow rod is formed. A solid rod has an inner core (called a solid, in which the reinforcing fibers are oriented substantially in the axial direction) and an outer layer. The reinforcing fiber of the core material is glass fiber, or the longitudinal elastic modulus is 24 to 40 ton / mm ² (235200 to 3
92000 N / mm ² ) carbon fiber is used. If glass fiber is used, the tip becomes sticky.

The reinforcing fibers of the outer layer are left and right with respect to the axial direction.
In order to be symmetrical, a structure that is inclined and directed in ± 45 degrees
Forming is also an example. In this case,
By the action, twisting of the tip rod can be prevented. False to 45 degrees
The difference range is about ± 15 degrees. As a reinforcing fiber, vertical bullet
The modulus is 1 to 60 ton / mm²(9800-58800
0N / mm²) Use carbon fiber. Specifically, strong
Use a bias cross where the synthetic fibers cross at right angles.
The number of turns is set to about 0 to 6 in the area near the end A,
Near the base (position P2), the number is about 0 to 13 times. This
Use the bias cross in carbon per unit area
In terms of fiber mass, 0-450 g / m ², 0 at the base
1900g / m²It is.

When the solid rod is used as the tip of the tip rod in this manner, the flexibility of the tip can be improved while preventing the tip from being crushed.
In addition, as described above, since the reinforcing fibers are inclined and directed to the outer layer, they are resistant to torsion, have good vibration damping properties, can reduce the deflection of the pole tip after throwing, and improve the long throw property. Also, the accuracy of directionality and the like are improved. Furthermore, since the reinforcing fibers are directed to the outer layer of the solid rod in the inclined direction, the flexural rigidity in this region is not so large, and the sensitivity of the tip is not impaired.

The stiffness ratio of 600 is an example, and it is generally preferable that the stiffness ratio be about 1,000 to 3,000, or about 1,000 to 4,000. In the above, the case of a three-joint fishing rod has been exemplified, but the number of joints is arbitrary, and the bending rigidity at a position 30% of the total length from the tip is about 600 times or more of the tip portion. Becomes However, in the case where the just position is local high rigidity such as a joint portion, the bending rigidity of the immediately preceding portion excluding the high rigidity is used.
In the case of four joints, the position is 25% from the tip, but other matters are the same. This is because the length of the four rods is set to be approximately the same length in the design of the fishing rod (of course, the head is set slightly shorter than the original rod), so the head is about 25% of the total length. It depends.

[0016] However, for example, if the tip
If the length is 25%, the position 25% from the tip is a little behind the joint, and in this case, the bending rigidity of the 25% position itself (the position on the ear rod) is The question is whether it is about 600 times or more. Therefore,
In the present application, not only the most advanced rod, but also the rod (homo rod) immediately thereafter may be considered together. In particular, if the leading rod is extremely short compared to the original rod, the rod immediately after the rod will be considered together. Conversely, in the case of two splices having substantially the same length, the tip is approximately 50% of the entire length, and the position of 30% is the middle position of the tip. In short, the problem is the broad concept area of the tip of the fishing rod.

In the above description, the difference in rigidity between the front end portion and the predetermined rear portion has been a problem. However, the difference in weight is a problem, and the weight per unit length at the position B described above is calculated by the unit length of the portion of the front end A. By setting the weight per hit to about three times or less, the tip portion can be easily bent as described above.

[0018]

As is apparent from the above description, the present invention makes it possible to reduce the rigidity of the tip region and to make it easier for a beginner or the like to operate a fishing rod that requires a throwing operation.

[Brief description of the drawings]

FIG. 1 is a side view of a fishing rod according to the present invention.

FIG. 2 is a bending rigidity diagram of the fishing rod of FIG. 1;

[Explanation of symbols]

10 Former rod 10T joint 12 Medium rod 12T joint 14 Head tip A Tip of fishing rod B Comparison position a predetermined distance behind the tip

Claims (2)

[Claims] 1. A fishing rod characterized in that it has a region where the bending rigidity of the fishing rod tip region suddenly changes and becomes smaller as compared with the change in bending rigidity of the fishing rod in the entire rear region thereof. 2. In the case of a single rod, the bending rigidity at a position about 30% of the entire length from the tip is about 600 times or more the bending rigidity of the tip of the fishing rod. The bending stiffness at a position about 30% of the total length from the tip is about 600 times or more of the bending stiffness of the fishing rod.
The bending stiffness at a position of about 0% is about 600 times or more, and in the case of a four-piece rod, the bending stiffness at a position about 25% of the entire length from the tip to the bending stiffness at the tip of the fishing rod is about 6 times.
A fishing rod, wherein the bending rigidity at a position of about 30% of the total length from the tip to the bending rigidity of the tip of the fishing rod is about 600 times or more with respect to the bending rigidity at the tip of the fishing rod.