JPH119148A - Fishing rod and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fishing rod having a concave and convex pattern clearly formed on the outer periphery, an efficiently suppressed sticky feeling of the rod, and a sufficient strength. SOLUTION: This fishing rod has a rod body 1 formed by winding a prepreg obtained by impregnating a resin in a reinforcing fiber such as carbon fiber on a mandrel, and having cylindrical shape tapered to a tip point. A convex part 10 is formed so as to be wound on the outer periphery of the rod body 1 in a spiral shape. The convex part 10 is obtained by winding a yarn obtained by impregnating the resin in the reinforcing fiber, in the spiral shape and further winding a tape for filling the gap between the yarn and the yarn in the axis direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fishing rod, and more particularly, to a fishing rod having an uneven outer peripheral surface.

[0002]

2. Description of the Related Art Some fishing rods are provided with helical irregularities on the outer peripheral surface thereof so that when water adheres to the outer peripheral surface of the fishing rod, the fishing line does not stick to the outer peripheral surface of the rod body. There is. A conventional fishing rod with irregularities on the outer peripheral surface is obtained by winding a prepreg layer around the outer periphery of a mandrel, and further winding a yarn impregnated with resin into a reinforcing fiber on the outer peripheral surface to obtain a rod material. It is manufactured by firing.

[0003] As another manufacturing method, a prepreg layer is wound around the outer periphery of a mandrel, a projection is drawn on the outer peripheral surface with screen ink to obtain a rod material, and the rod material is fired to produce the rod material. There is also.

[0004]

However, it is difficult to say that this type of conventional fishing rod has sufficient unevenness to prevent stickiness of the fishing line. That is, in the case where irregularities are formed by winding a yarn around the outer peripheral surface of the rod body, the resin is delicately deformed by baking, so that the unevenness appearing on the outer peripheral surface becomes gentle. As a result, the tackiness preventing effect of the fishing line is reduced. Also, in the case where projections and depressions are formed on the outer peripheral surface by using screen ink, if the ink is dried and fired, the steps of the projections and depressions become gentle. Furthermore, the productivity is lower than when yarn is used.

[0005] Further, when the yarn is wound around the outer peripheral surface of the rod body to form irregularities, the yarn penetrates or sinks into the prepreg constituting the rod body. May occur. This bending or meandering is one of the causes of a decrease in the strength of the rod body. It is an object of the present invention to provide a method for manufacturing a fishing rod, which has irregularities clearly expressed on an outer peripheral surface and can effectively suppress stickiness of the fishing rod.

Another object of the present invention is to provide a fishing rod having sufficient strength.

[0007]

A method of manufacturing a fishing rod according to a first aspect of the present invention is a method of manufacturing a fishing rod having a helical unevenness on the outer peripheral surface, and has the following steps. ◎ A step of applying a release agent to the core material. ◎ A step of winding a prepreg on the outer peripheral surface of the release agent. ◎ A step of winding a yarn around the outer peripheral surface of the prepreg with an axial gap therebetween, and winding a step filling tape in the axial gap between the yarns to obtain a rod material. ◎ The process of firing the rod material. ◎ A process of removing the core material and peeling off the step filling tape.

In this case, the step filling tape wound between the wound yarns prevents the resin constituting the yarn from flowing delicately at the time of firing, thereby suppressing unevenness. For this reason, the step of the unevenness on the outer peripheral surface becomes clear. In addition, when the yarn is wound only on the rod material, the force when the yarn is wound on a portion where the yarn is not wound acts on the rod material, and the orientation of the fiber of the prepreg sheet constituting the rod body is inclined. Here, when the step filling tape is wound around the gap between the yarns in the axial direction, the force is evenly applied to the entire surface of the rod body, so that the bending and meandering of the fiber orientation of the prepreg sheet constituting the rod body are suppressed. Can be

A fishing rod according to a second aspect of the present invention is the fishing rod according to the first aspect, wherein a rod body obtained by winding a prepreg layer having reinforcing fibers oriented in an axial direction, and a spiral rod provided on the outer peripheral surface of the rod body. The reinforcing fibers are provided with a convex portion, and the reinforcing fibers oriented in the axial direction are substantially linearly oriented in the axial direction near the spiral convex portion. In this case, the orientation of the fibers of the prepreg sheet constituting the rod body is substantially linear in parallel to the axial direction without being curved by receiving a force from the outside when forming the spiral convex portion. The orientation of the rod prevents the strength of the rod from decreasing.

Here, the orientation of the reinforcing fibers of the prepreg sheet in the axial direction is preferably at an angle of 15 degrees or less from the axial center line. If it spreads more than 15 degrees, the bending strength of the rod body will be extremely reduced. In consideration of the bending rigidity of the rod body,
More preferably, the orientation of the reinforcing fibers in the axial direction is within a range of 10 degrees from the axial center line.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. (Summary of Structure) As shown in FIG. 1, a fishing rod 100 adopting an embodiment of the present invention has a rod body 1, a front grip 2 disposed on the outer periphery of the rod body 1, and a hand end. And a rod base grip 3.
A fishing line 20 is provided between the front grip 2 and the rod base grip 3.
A reel 4 for winding 0 is mounted.

The rod body 1 is formed by winding a sheet-shaped prepreg in which a reinforcing fiber such as carbon fiber is impregnated with a resin around a mandrel, and has a tapered tapered tip and a cylindrical shape. It is. And as shown in FIG.
On the outer peripheral surface of the rod body 1, a convex portion 10 wound spirally is formed. The convex portion 10 is obtained by spirally winding a yarn obtained by impregnating a reinforcing fiber with a resin, as described later. (Manufacturing method) A fishing rod 100 employing one embodiment of the present invention is manufactured as follows.

As shown in FIG. 3, first, the mandrel 30
A release agent 31 such as wax is applied to the outer periphery of the substrate. A release tape 32 made of polypropylene resin is wound around the outer peripheral surface of the release agent 31. Next, on the outer peripheral surface of the release tape 32,
A plurality of prepreg layers 41 to 44 are wound. These prepreg layers 41 to 44 are formed by winding a prepreg tape in which a sheet-shaped prepreg obtained by impregnating a reinforcing fiber such as a carbon fiber with a resin into a thin tape shape. here,
The innermost first prepreg layer 41 is formed by using one in which reinforcing fibers are oriented in the length direction of the tape, and the reinforcing fiber group 51 is oriented in the circumferential direction of the rod body 1. In addition, the second to fourth prepreg layers 41 to 44 are formed by using reinforcing fibers oriented in the width direction of the tape,
The second to fourth reinforcing fiber groups 52 to 54 are oriented in the axial direction of the mandrel.

After arranging the four prepreg layers 41 to 44, as shown in FIG. 4A, a yarn 50 in which a reinforcing fiber is impregnated with a resin is placed on the outer peripheral surface of the prepreg layer at a predetermined interval in the axial direction. And spirally wound. This yarn 5
0, and a step filling tape 51 is wound between the yarns. After winding the yarn 50 and the step filling tape 51 in this way, a protective tape (not shown) made of polyethylene terephthalate or polypropylene is further wound around the outer periphery thereof to obtain a rod material. The obtained rod material is fired, the mandrel 30 is extracted, and the protection tape, the release tape 32 and the step filling tape 51 are sequentially peeled off, and as shown in FIG. The manufactured rod body 1 is manufactured. (Operation) Since the fishing rod 100 thus configured is manufactured by winding the yarn 50 and winding the step filling tape 51 in the axial gap between the yarn 50 and the yarn 50, the yarn 50 is delicate during firing. And unevenness is not smoothed.

Further, since the step filling tape 51 is wound together with the yarn 50, a force is uniformly applied to the entire outer peripheral surface of the rod material, and the deformation of the second to fourth reinforcing fiber groups 52 to 54 is suppressed.

[0016]

【Example】

(Example 1) Using a mandrel having a diameter of 4 mm, a fishing rod was manufactured by the above-described manufacturing method. (Example 2) Using a mandrel having a diameter of 6 mm, a fishing rod was manufactured by the above-described manufacturing method. (Example 3) Using a mandrel having a diameter of 8 mm, a fishing rod was manufactured by the above-described manufacturing method. (Example 4) Using a mandrel having a diameter of 10 mm, a fishing rod was manufactured by the above-described manufacturing method. Comparative Examples 1-4 Corresponding to the above Examples 1-4, fishing rods were manufactured by a conventional manufacturing method using mandrels having diameters of 4, 6, 8, and 10 mm. Specifically, a fishing rod was manufactured by winding a plurality of prepreg layers around a mandrel and then winding only the yarn without winding a filling tape. (Experiment 1) After producing each of Examples 1 to 4 and Comparative Examples 1 to 4, θ of each fishing rod was measured. Here, θ is the angle formed between the axial center line of the rod body and the axially oriented reinforcing fibers of the rod body.

When 100 samples are respectively extracted, in Examples 1 to 4, θ of the manufactured fishing rod is limited to 15 degrees. On the other hand, in Comparative Examples 1 to 4, even if the manufactured fishing rod has the smallest θ, it exceeds 20 degrees. That is, it can be seen that the fishing rod manufactured by the manufacturing method according to the present invention has very little bending or meandering of the orientation of the rod body reinforcing fiber. (Experiment 2) The above Examples 1-4 and Comparative Examples 1-4 were subjected to JI
The bending strength was calculated according to the bending test method of carbon fiber reinforced plastic of SK7074. Here, a pipe-shaped rod body was used as a test material instead of a plate, and a test was performed with a four-point bending test apparatus. The fulcrum distance is 300 mm, and the interval between the indenters is 150 mm. Table 1 shows a plot of samples having various θs according to the inner diameter of the mandrel.
And Table 2. Table 1 plots bending strength against θ, and Table 2 plots bending rigidity against θ.

[0018]

[Table 1]

As is evident from Table 1, the bending strength of the rod sharply decreases when θ exceeds about 15 degrees.
That is, it can be said that a rod having a large θ is difficult to withstand a large load.

[0020]

[Table 2]

As apparent from Table 2, the bending stiffness of the rod greatly decreases from the vicinity where θ exceeds 10 degrees.

[0022]

As described above, according to the method for manufacturing a fishing rod according to the present invention, the outer peripheral surface has irregularities clearly expressed,
A fishing rod capable of effectively suppressing stickiness of the fishing rod can be manufactured. Furthermore, since the displacement of the orientation of the reinforcing fibers of the mandrel forming the rod body of the fishing rod can be suppressed, a fishing rod having sufficient strength can be manufactured.

[Brief description of the drawings]

FIG. 1 is an overall view of a fishing rod employing an embodiment of the present invention.

FIG. 2 is an enlarged view of a rod body outer peripheral surface of a fishing rod employing one embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a method of manufacturing the rod body during manufacturing.

FIGS. 4A and 4B are enlarged views showing a method of manufacturing the rod body during the manufacturing process (a) and after the manufacturing process (b).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rod main body 10 Convex part 30 Mandrel 32 Release tape 41 First prepreg layer 42 Second prepreg layer 43 Third prepreg layer 44 Fourth prepreg layer 50 Yarn 51 Step filling tape

Claims (2)

[Claims] 1. A method of manufacturing a fishing rod having a helical projection on an outer peripheral surface thereof, comprising: applying a release agent to a core material; and winding a prepreg around the outer peripheral surface of the release agent. And winding a yarn forming the convex portion on the outer peripheral surface of the prepreg with an axial gap therebetween, and winding a step filling tape in the axial gap between the yarn and the yarn to obtain a rod material. And a step of firing the rod material; and a step of removing the core material and peeling off the stepping tape. 2. A rod body obtained by winding a prepreg layer having reinforcing fibers oriented in an axial direction, and a spiral convex portion provided on an outer peripheral surface of the rod body, wherein the rod is oriented in the axial direction. The reinforcing fibers are not curved near the helical convex portion and are oriented substantially linearly in the axial direction,
fishing rod.