JPH0634459U - Fishing rod - Google Patents

Abstract

(57) [Summary] [Purpose] To make it less susceptible to low-frequency disturbance vibrations,
The purpose of the present invention is to provide a fishing rod with improved sensitivity to fishery. [Structure] The bending rigidity of a certain range of the tip portion is made higher than the bending rigidity of the rear portion, or the mass bodies 14A, 14B are attached to the positions PA, PB, PC of the node of the vibration W4 corresponding to the sensing target frequency. 14C is added.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fishing rod that has improved the sensitivity of fishery and improved fishing results.

[0002]

[Prior art]

 As a method for improving the results of fishing, for example, in JP-A-62-22529 and JP-B-2-46289, a fish plucks and pulls in the bait, bends the tip of the bait, and then when the bait is released, the bait is taken together with the bait. There is a possibility that the fish may suddenly move away and give a feeling of strangeness or caution, and a device for preventing this by increasing the damping coefficient of the tip is disclosed.

Further, unlike the device described in each of the above-mentioned publications, an acceleration sensor is provided at the tip of the publication in Japanese Utility Model Publication No. Hei 3-13194 to detect vibrations and amplify the vibrations in order to improve fishing results. Then, a device for making it easier to detect fishery is disclosed.

[0004]

[Problems to be solved by the device]

 However, in addition to the vibration caused by the fishing rod, the vibration of the fishing rod and the disturbance vibration due to the influence of the waves are combined and transmitted to the hand of the fisherman who holds the fishing rod. Therefore, the vibration amplification disclosed in the above publication also magnifies such disturbance, and it may not be said that it is sufficient to improve the fish-tread sensitivity.

Disturbance vibration due to the influence of rod deflection, waves, etc., caused by the operation of the fishing rod is generally a low-frequency vibration of 10 Hz or less. On the other hand, as a result of research conducted by the present inventors, it was found that the frequency of the vibration generated on the fishing rod during fishing was almost constant depending on the type of fish, and it was found that there is a dominant frequency depending on the type of each fish. ing. Of course, the dominant frequency will change somewhat depending on the size and environment of the fish, but a representative value can be set according to the type of fish. Normal fish to be fished have typical values within the range of 10-40 Hz. From experience, there is a problem that the above-mentioned low-frequency disturbance vibrations cannot be sensitively sensed by the fishnet itself.

Therefore, an object of the present invention is to provide a fishing rod that is less susceptible to low-frequency disturbance vibrations and that has improved sensitivity to fish stock.

[0007]

[Means for Solving the Problems]

 In view of the above object, the present invention provides a fishing rod characterized in that the bending rigidity of a certain range of the tip portion is made higher than the bending rigidity of the rear portion thereof. In addition, a fishing rod having a feature that a mass body is added to the position of the vibration node corresponding to the frequency to be sensed is provided.

[0008]

[Action]

 If the bending rigidity of the tip portion in a certain range is made higher than the bending rigidity of the rear portion, that is, if the tip portion of the fishing rod is made hard, the fishing rod has a hard tone and it becomes difficult to transmit low-frequency vibration. In addition, the resonance frequency of the fishing rod, which is close to the predominant frequency at the time of fish-belt according to the type of fish, is the frequency to be sensed at the time of fish-belt. Although it has no effect on vibration, vibration of other frequency modes is affected and its frequency is reduced. Therefore, the frequency interval between the frequency to be sensed and the frequency of the disturbance vibration having a frequency lower than this becomes large, and the vibration of the sensing frequency can be sensed to that extent.

[0009]

【Example】

 Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 shows a tip portion of a joint type fishing rod 10 in which a tip portion 12A having a constant length of the tip 12 is set to have a bending rigidity larger than that of a rear portion 12B.

It has been already known that if the tip of the same fishing rod is slightly cut and shortened, it becomes a fishing rod with a hard tone and it is difficult to resonate with low frequency vibration. Even for fishing rods of the same size, changing the type of fiber reinforced prepreg, increasing the number of windings, and increasing the tension during winding will make the fishing rod to a more tough condition. It is also well known that it can be finished.

When the tip portion 12A of the above-mentioned tip is manufactured so as to have a large bending rigidity, this portion is unlikely to resonate with low-frequency vibration, and as a result, the tip portion 12A becomes low-frequency vibration. On the other hand, it does not act effectively, and the same effect as when the above-mentioned tip portion is slightly cut or other above-mentioned measures is produced. Therefore, it becomes a fishing rod with a hard tone, it becomes difficult to pick up low-frequency disturbance vibrations, and the fish-tick sensitivity is improved.

Such a rod tip 12 is integrally molded by changing its bending rigidity by changing the kind of fiber prepreg of the rear portion 12B and the front portion 12A or changing the winding tension at the time of manufacturing. can do. Further, although the fishing rod is of the joint type in the above description, the fishing rod is not limited to this, and a single rod may be used. The point is that the tip of the fishing rod is made to have a greater bending rigidity than the adjacent rear part.

A second embodiment of the present invention will be described with reference to FIGS. 2 and 3. FIG. 2 schematically shows a state in which a fisherman is gripping the gripping portion 10B of the fishing rod 10 with his / her hand, and the tip is indicated by 10A. It is assumed that the resonance frequencies of the fishing rod in this fishing state are f1, f2, f3, f4, f5, f6 .... These values can be obtained by measuring the vibration of the fishing rod 10 by applying an impact force with an impact hammer or the like in a laboratory and analyzing it by a frequency analyzer. As a result, the case where each of the above frequencies is 3 Hz, 6 Hz, 10 Hz, 21 Hz ... Will be described.

When the target fish for fishing is sweetfish, the dominant frequency was about 20 Hz in an example of an experiment in friend fishing. In this case, the sensing target frequency corresponding to the fish-belt is f4 (21 Hz), and a frequency of 21 Hz appears largely on the fishing rod when the ayu-fish is fish-fished during friend fishing. This example is shown in FIG. 3, which is a frequency analysis diagram. However, as mentioned above, if there is a low-order disturbance vibration, it is difficult to detect the vibration of the target frequency, which can be said to be the fish-belt.

Therefore, as shown in FIG. 2, a fishing rod is provided in which the mass bodies 14A, 14B, and 14C are attached to the node positions PA, PB, and PC of the vibration W4 of the fourth-order mode. Each of the mass bodies may have various shapes such as a ring-shaped rubber member, a metal added to the mass member to increase the mass, or a lead plate wound around a rod.

Since this mass body is provided at the node position of the vibration of the frequency to be sensed, which is the fourth-order mode, the fourth-order mode is not changed, but for the vibration W3 of the third-order mode indicated by the broken line, for example, Since the vibration is located at a position other than the node position, the frequency is reduced. The same applies to the vibrations of other modes, and the frequencies other than the vibration of the fourth mode change in the direction in which the original frequency decreases.

Explaining this with reference to FIG. 3, the frequency interval Δf between the sensed frequency f4 of the fourth-order mode and the frequency f3 of the third-order mode adjacent to the low-order side is widened. Therefore, the vibration sensitivity of the fourth-order mode is less likely to be affected by the vibration of the lower-order mode, and the fish-sense sensitivity is improved. However, in this case, the values of the higher-order frequency f5 and the like also become smaller, and the value approaches the fourth-order frequency f4. However, it has been empirically known that the influence of vibrations of lower frequencies is greater than the influence of vibrations of higher frequencies. The addition of "" contributes to the improvement of the sensitivity of Uoshinobu.

At the time of adding the mass body, it is not necessary to add the mass body to all the node positions of the vibration W4 of the fourth-order mode. For example, even if the mass body 14A is added only to one point PA. Good. In this case, it is possible to lower the frequencies of the other modes by adding a lighter mass body to the position PB than to the position PA and to the position PC to the position PB.

[0019]

[Effect of device]

 As is clear from the above description, according to the present invention, it becomes difficult to pick up low-order disturbance vibrations, and the disturbance vibrations are moved further to the lower frequency side, so that fish sensitivity is improved.

[Brief description of drawings]

FIG. 1 is a side view of a main part of a first embodiment according to the present invention.

FIG. 2 is an explanatory view of a second embodiment according to the present invention.

FIG. 3 is an explanatory diagram of a second embodiment according to the present invention, which is a frequency analysis diagram.

[Explanation of symbols]

10 Fishing rod 12 Ear tips 14A, 14B, 14C Mass body PA, PB, PC Node position of frequency vibration of sensing target W3 Vibration of third mode W4 Vibration of fourth mode (frequency vibration of sensing target)

Claims (2)

[Scope of utility model registration request] 1. A fishing rod characterized in that the bending rigidity of the tip portion in a certain range is made higher than the bending rigidity of the rear portion. 2. A fishing rod, wherein a mass body is added to a position of a vibration node corresponding to a frequency to be sensed.