JP3473727B2 - Fishing rod - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rod tube reinforced with reinforcing fibers using a thermosetting or thermoplastic resin as a matrix.
It relates to a fishing rod having. [0002] Conventionally, in order to greatly change the bending rigidity of a rod tube as a tubular body in the longitudinal direction, it is necessary to largely change the rod diameter or to use the reinforcing fiber in the axial direction (the number of prepreg windings). ). [0003] However, since the axial direction reinforcing fiber has too great an effect on the bending rigidity, the axial direction reinforcing fiber is used for producing a delicate tip rod or the like. Sometimes things are unsuitable. Further, when the number of turns of the prepreg is changed, the thickness of the base side is increased and the weight of the rod pipe increases, or the outer diameter increases. In particular, at the tip of the fishing rod, the diameter has to be increased in comparison with other types of fishing rods in order to secure the fishing line insertion space. It is difficult to adjust the bending stiffness by reducing the diameter of the tip portion, and the bending stiffness tends to be higher in the case of a penetrating spike. In the above, the case where the bending stiffness of the original side is increased and the front side is reduced is described. However, the rigidity of the front side is not always reduced. There are various design restrictions when it is desired to change the bending stiffness in the axial direction, including other tubular bodies, but it is necessary to effectively change the bending stiffness even under such restrictions. Accordingly, it is an object of the present invention to provide a fishing rod in which the bending rigidity is effectively changed even under various design constraints. In particular, it is an object of the present invention to provide a fishing rod which has a delicate tone, is thin and lightweight, and has a region in which the tone of the front part and the base part are changed. [0005] In view of the above-mentioned object, the present invention relates to a rod according to claim 1, wherein the rod is reinforced with a reinforcing fiber using a synthetic resin as a matrix, and the reinforcing fiber oriented in the circumferential direction is provided. It has a circumferential layer as a main body, and both ends of the rod pipe
In part excluding the region, having a rod tube which is smaller as the front side than the longitudinal elastic modulus original side of the reinforcing fibers in the circumferential direction layer
A fishing rod is provided . [0006] According to tests, if a layer mainly composed of circumferential reinforcing fibers is provided in addition to a layer of reinforcing fibers (bias sheet layer) inclined in both directions and a fiber layer in the axial direction, the conventional structure is obtained. Unlike the viewpoint, it was found that the former layer and the latter layer interact with each other when flexing, and that the bending rigidity is strongly affected by the rigidity of the circumferential reinforcing fiber layer . [0007] Therefore, in claim 1, the circumferential reinforcing fiber
Change the longitudinal elastic modulus in the longitudinal direction of the rod,
Reinforcement fiber with large longitudinal modulus
Because it is used, the bending rigidity becomes smaller toward the front side,
Changes. Therefore, the amount of circumferential reinforcing fibers used
Change or change the amount of reinforcing fiber in the axial direction
Effectively change the bending stiffness of the rod even if it is not possible
be able to. Changes in the axial direction are within one rod pipe
In the case of changing with a single rod or in the case of a single rod,
And change it. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail based on an embodiment shown in the accompanying drawings. FIG. 1 shows a through fishing rod as an example of a tubular body having a structure according to the present invention. The center rod 12 is spliced to the original rod 10 and the spike rod 14 is spliced to the center rod 12. A top guide 16 is attached to the tip of the tip rod 14, a reel 20 is held and fixed to the original rod 10 by a reel mounting device 18, and a fishing line introduction guide 22 is mounted in front of the reel 20. 24 are introduced inside the rod tube. FIG. 2 shows the tip rod 14. The front end 26 is joined to the top guide 16 and the rear end 2
Reference numeral 6 'denotes a joint portion with the middle rod 12, and the outer periphery or the inner periphery is thickened to secure strength. FIG. 3 is an enlarged view of the tube wall in another region of the tip rod 14. The outer layer 14A is a layer in which the main reinforcing fibers (carbon fibers) used are inclined at an angle of about 45 degrees in one direction with respect to the axial direction of the tip rod 14, and the inner middle layer 14B is used. The main reinforcing fiber (carbon fiber) is a layer inclined in a direction symmetric with respect to the axial length direction, and the inner layer 14C is a layer in which the reinforcing fiber is directed substantially in the circumferential direction. In addition, this inner layer 14
In the original side area C40 of the tip rod of C, the longitudinal elastic modulus is 40 to.
n / mm ² of carbon fiber is used,
, Glass fiber having a longitudinal elastic modulus of about 7.4 ton / mm ² is used, and the longitudinal elastic modulus is 2 in the intermediate region C24.
Carbon fiber of about 4 ton / mm ² is used. The reinforcing fibers of the outer layer and the intermediate layer are carbon fibers having a longitudinal elastic modulus of about 60 ton / mm ² , and the synthetic resin used is an epoxy resin. Each layer 14A,
The thicknesses of 14B and 14C are about 0.1 mm and 0.1 m, respectively.
m, 0.03 mm. In the pipe wall having such a structure, the tip rod 14 is more apt to bend toward the tip part, and therefore, even if the tip part cannot be formed to be thin, the bending rigidity of the tip part can be kept low. It is suitable for a part where the diameter becomes large as shown in FIG. In other words, the condition of the rod can be changed without changing the diameter and thickness of the rod pipe in the longitudinal direction. Therefore, the rod condition can be changed with a thin wall and a light weight. In particular, it is possible to obtain a fishing rod having a delicate tone on the tip side of a tip portion of a fishing rod, such as a tipping rod, and a rigid portion on the base portion side. The combination of the outer layer and the intermediate layer is usually called a bias sheet. If the tube wall is formed only with the bias sheet as the reinforcing fiber, the bending rigidity is small, but if the layer 14C of the circumferentially oriented reinforcing fiber, which is generally recognized as hardly contributing to the bending rigidity, is used together, It was confirmed that the bending rigidity of the rod tube was increased. That is, the test pieces 1 and 2 using carbon fibers under the following conditions
A point bending test was performed. As a result, it was found that the effect of the circumferentially oriented reinforcing fiber layer on the bending stiffness was large. Specimen 1 thickness (mm) longitudinal elastic modulus (ton / mm ² ) layer 14A 0.160 layer 14B 0.160 layer 14C 0.03 24 specimen 2 thickness (mm) longitudinal elastic modulus (mm) ton / mm ² ) Layer 14A 0.160 Layer 14B 0.160 Layer 14C 0.03 40 As a result of this bending test, the bending rigidity of test pair 2 is about 40 It has been found that the percentage has increased. This greatly exceeds the range of conventional recognition, and it has been found that the longitudinal elastic modulus of the circumferential reinforcing fiber greatly affects the bending rigidity of the tubular body. It was found that the same tendency was obtained when the amount of the circumferential reinforcing fibers was changed, and when the layers 14A and 14B were not the bias layers but were layers in the axial direction. Although carbon fibers were used as the above reinforcing fibers,
In the present invention, the type of the reinforcing fiber and the type of the synthetic resin are not limited.
Further, the present invention may be applied to a partial area of the rod irrespective of the type of fishing rod or single rod. Further, the present invention may be applied to a fishing rod other than a through fishing rod . As is apparent from the above description, according to the first aspect of the present invention, the longitudinal elastic modulus of the circumferential reinforcing fiber is changed in the longitudinal direction of the rod pipe , and the longitudinal elastic modulus is changed to the original side. Since a larger reinforcing fiber and a smaller reinforcing fiber are used on the front side, the bending rigidity becomes smaller on the front side, and the tone changes. Therefore,
Even if the amount of the reinforcing fibers in the circumferential direction to be used cannot be changed or the amount of the reinforcing fibers in the axial direction cannot be changed, the bending rigidity of the rod pipe can be effectively changed .

[Brief description of the drawings] FIG. 1 is a side view of a fishing rod according to the present invention. FIG. 2 is a view of the spike of FIG. 1; FIG. 3 is an enlarged view of the tube wall of FIG. 1; [Explanation of symbols] 14 Eartip 14A A layer in which reinforcing fibers are inclined in one direction 14B Layer in which reinforcing fibers are inclined in the other direction 14C Layer in which reinforcing fibers are oriented in the circumferential direction

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-242045 (JP, A) JP-A-62-180520 (JP, U) JP-A-59-5322 (JP, U) JP-A-1 95331 (JP, U) Actually open sho 59-11675 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B29C 70/00-70/88 A01K 87/00

Claims (1)

(57) the Patent Claims 1. A synthetic resin matrix, a rod tube reinforced with reinforcing fibers, has a circumferential layer mainly composed of reinforcing fibers oriented in the circumferential direction , Excluding both ends of the rod pipe
In stomach area, to have a rod pipe which is smaller as the front side than the longitudinal elastic modulus original side of the reinforcing fibers in the circumferential direction layer
Fishing rod characterized by the following .