JPS5841831Y2 - fishing rod - Google Patents

Description

[Detailed explanation of the invention] Recent fishing rods, especially mountain stream rods, sweetfish rods, etc., have thinner tubes to reduce weight and adjust the condition. Even with normal handling when the parts are joined, the joint part of the inner part tends to shrink, and the joint part of the outer rod tends to expand, resulting in a more secure fit than the designed joint.

In other words, for the swinging rod, the joint width is shorter than designed,
In the case of parallel jointed rods, the joint width becomes longer and the frictional force on the joint surface increases, and this tendency becomes even more pronounced when moisture is resistant to adhering to the joint surface. It is often impossible to store or pull out the fishing rod, and as a result, there is a defect that the fishing rod may break due to handling with excessive force.

Conventionally, it has been considered to use rubber tail plugs, joints, or packings at the joints of fishing rods, but such joining methods using attached parts are not suitable for fishing rods. This has the major disadvantage that it not only complicates manufacturing, but also disrupts the vitality of the fishing rod and increases its weight.

In view of these current circumstances, the present invention aims to improve the above-mentioned defects by simply improving the joining surface of the rod and pipe.The present invention is a tapered rod made by winding reinforcing fibers impregnated with synthetic resin. The gist of the fishing rod is that a concave groove is integrally formed in the circumferential direction on the outer peripheral surface of the inner rod tube to be joined.

Embodiments of the present invention will be explained with reference to the drawings. 1 and 2 are fabrics made of reinforcing fibers such as glass fibers or carbon fibers or aligned sheets impregnated with synthetic resin and rolled into a tapered tubular shape as is known in the art. This is a re-molded rod tube of a parallel joint rod or a swing-out fishing rod, and a concave groove 3 is integrally formed in the circumferential direction on the outer peripheral surface of the joint surface of the inner rod tube 2 at the joint portion at the same time as the molding.

The means for integrally forming the concave groove 3 is to attach a lug B made of the same material to the end of the winding as shown in Fig. 2 when the resin-impregnated woven fabric or the lining sheet A is wound around a core metal and molded. Either the selvedge B is wrapped around the core metal and then the selvedge is wound together, or the selvedge B is first wound around the core metal, and then the woven fabric or the aligned sheet A is wound. It is preferable to heat-treat this by a conventional method and then pultrusion mold the core metal.Furthermore, in place of the selvedge B, a thread impregnated with a resin can be used after or before winding the woven fabric or the pulling sheet. It is also possible to form the concave groove 3 by winding it.

The grooves 3 may be provided in plural numbers as shown in FIGS. 3 and 4, or may be formed in a spiral shape, and the depth thereof may be 0.
Approximately 5r+on is appropriate.

Next, the experimental results for the swinging rod of the present invention were as follows.

Inner diameter 17. Made of glass fiber reinforced polyester resin.
98 rran, an inner rod tube with an outer diameter of 19.20 mm and an outer rod tube with an inner diameter of 19.20 mm and an outer diameter of 20.188 mm.
The following table shows the pull-out condition when excessively spliced.

In this invention, at the joint of each rod pipe of a swinging rod or a parallel connecting rod,
Since a concave groove is integrally formed in the circumferential direction on the outer circumferential surface of the inner rod tube, the inner rod tube and outer rod tube will not come into close contact with each other even if they are overfitted during joining, making attachment and detachment smooth and reliable. At the same time, since the concave groove is formed integrally in the material that makes up the rod tube, there is no need to attach attached parts such as rubber rings or rubber plugs, so there is no need to reduce the weight of the rod or reduce the condition. It has excellent features such as being able to join a swinging rod or a parallel connecting rod without breaking the structure, and being extremely simple to manufacture.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional front view of the present invention, Fig. 2 is a developed view of a reinforcing fiber sheet impregnated with resin used in the present invention, and Figs. 3 and 4 are longitudinal cross-sectional front views of other embodiments of the present invention. It is. 1.2... Rod pipe, 3... Concave groove.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a fishing rod in which reinforcing fibers are impregnated with synthetic resin and wound and molded to join rod tubes with letter tapers, a concave groove is integrally formed in the circumferential direction on the outer peripheral surface of the inner rod tube to be joined. The formed fishing rod. 2. A fishing rod as set forth in claim 1 of the utility model registration claim in which a plurality of grooves are formed. 3. A fishing rod as described in item (m) 1 of the utility model registration request, in which the concave groove is formed in a spiral shape.