JPH044526Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention is a connecting structure for swinging rods, parallel connecting rods, and other fishing rods. The present invention relates to a connecting structure for a fishing rod that connects a side rod body and a large diameter side rod body formed into a hollow, gently conical shape.

(Prior Art) When fishing in rainy weather using fishing rods such as swing rods, if the joint between the small diameter rod body and the large diameter rod body gets wet with rainwater, the rod bodies of these rods may become damaged. The connecting portions of the rods swell, and the connecting portions become firmly attached to each other, causing so-called jamming, making it impossible to store or pull out the small-diameter rod body from the large-diameter rod body with normal force. For this reason, the fishing rod bodies may be housed or pulled out with excessive force, resulting in breakage of the fishing rod.

Conventionally, an annular groove is formed on the outer circumferential surface of the joint of the small-diameter rod main body to reduce the contact area of the joint between the small-diameter rod main body and the large-diameter rod main body. The joint structure of fishing rods that prevents the joints of each rod body from becoming jammed was developed by Jikosho.
This has already been proposed in Publication No. 58-41831.

(Problems to be Solved by the Invention) By the way, in the fishing rod coupling structure described in the above-mentioned publication, since an annular groove is formed on the outer peripheral surface of the coupling portion of the rod body, the strength of the rod body is impaired. Moreover, there were also problems such as sand entering the groove and damaging the rod body.

The present invention was devised in view of the above-mentioned problems, and its purpose is to interpose a spherical layer having a large number of microscopic hollow spheres between the joint portion of the small-diameter side rod body and the large-diameter side rod body. A connecting structure for a fishing rod that can reduce the contact area between the connecting parts with the spherical layer and prevent the rod bodies from becoming jammed without causing a large decrease in strength or intrusion of sand, etc. Our goal is to provide the following.

(Means for Solving the Problems) As shown in the embodiments of the drawings, the present invention consists of a small-diameter side rod body 1 formed into a gently conical shape by prepreg made of high-strength fibers impregnated with synthetic resin, and a gently conical shape. This is a coupling structure for a fishing rod that is coupled to a large-diameter rod body 2 formed in a hollow shape, and has an annular groove 3 on the circumferential surface of the coupling portion on one side between the small-diameter rod body 1 and the large-diameter rod body 2.
In this annular groove 3, a spherical layer 4 was provided, in which a large number of microscopic hollow spheres were interposed in a synthetic resin, and the surface had a large number of non-contact recesses 4b that did not contact the circumferential surface of the other joint part. It is characterized by this.

(Function) Therefore, the small diameter side rod body 1 and the large diameter side rod body 2
When connecting these rod bodies 1 and 2, a spherical layer 4 is interposed between the connecting portion circumferential surfaces of each of these rod bodies 1 and 2, and the non-contact recess 4b of the spherical layer 4 allows the rod bodies 1 and 2 to be connected to each other.
While the contact area between the joints in the rod bodies 1 and 2 can be reduced, the occurrence of jamming between the joints of the rod bodies 1 and 2 can be eliminated. In addition, although the annular groove 3 is provided at the joining portion of one of the rod bodies 1 and 2, the spherical layer 4 is loaded inside the groove 3. Decrease in the strength of the rod body provided with the groove 3 can be reduced,
Furthermore, the spherical layer 4 prevents sand and the like from entering the groove 3, thereby preventing the fishing rod from being damaged.

(Example) The connecting structure of a fishing rod according to the present invention will be explained below with reference to an example shown in the drawings.

Figure 1 shows a swinging rod, which is hollow inside and has a gently conical shape, made of prepreg, which is made by impregnating high-strength fibers such as carbon fibers and glass fibers with synthetic resins such as epoxy resin and polyester resin. A small-diameter rod body 1 and a large-diameter rod body 2 having a slightly larger diameter than the rod body 1 are respectively formed, and the small-diameter rod body 1 is attached to the large-diameter rod body 2.
The interior is designed to allow entry and exit.

Therefore, the large diameter side rod body 2 of the small diameter side rod body 1
The peripheral surface of the connecting part to, that is, the small diameter side rod main body 1
An annular groove 3 having a predetermined depth is formed on the outer circumferential surface of the rear side of the rod, and a large number of micro hollow spheres 4a are interposed in the synthetic resin inside the groove 3, and the large diameter rod body is formed on the outer surface of the rod body. A spherical layer 4 having a non-contact recess 4b that does not come into contact with the inner circumferential surface of the joint portion of No. 2 is loaded.

The spherical layer 4 is made of a large number of micro hollow spheres 4a each having a diameter of 0.01 to 0.1 mm, and a synthetic resin that connects each of these spheres 4a, and the volume ratio of the micro hollow spheres 4a to the synthetic resin is They are dispersed and interposed at a ratio of 20 to 30%, and formed into a sheet so that the overall specific gravity is 0.6 to 0.9 and the thickness is approximately the same as the depth of the annular groove 3.

The synthetic resin forming the spherical layer 4 is a thermosetting resin such as epoxy resin or phenolic resin, and the micro hollow spheres have a spherical shell structure with an outer diameter on the order of microns and a thin film wall, Inorganic materials such as alumina, silica, shirasu, carbon and glass; organic materials such as soybean protein, cellulose derivatives, natural rubber, polyvinyl alcohol, polystyrene, polyethylene, polyamide, epoxy and polyurethane; and metallic materials such as tungsten. used.

The annular groove 3 is formed by forming two grooves at a predetermined interval in the width direction on the outer peripheral surface of the proximal end of the rod element after the wide prepreg is wound around a core metal to form a rod element. A narrow prepreg is wound to form a bonding layer made of high-strength fibers, and the spherical layer 4 is integrally formed when the rod body 1 is molded. That is, after forming the rod element and the bonding layer, the spherical layer 4 is formed by winding a spherical sheet made of a large number of microscopic hollow spheres bonded with synthetic resin in the annular groove 3 of the bonding layer. Then, cellophane tape is wrapped around the outer periphery of the rod element body, the bonding layer, and the spherical layer to bind the rod element body, the bonding layer, and the spherical layer, and the rod element body is heated and fired in a heating furnace. The rod main body 1 and the spherical layer 4, which are composed of a bonding layer and a bonding layer, are bonded together. In this case, the thermosetting synthetic resin of the spherical sheet melts and has a low viscosity when hardened by the baking, but since the annular groove 3 is formed by winding the prepreg, the spherical sheet It does not flow outward.

The spherical layer 4 formed as described above is provided with a non-contact recess 4b between each of the spherical bodies 4a exposed on its outer surface. Each sphere 4 in the sphere layer 4 is loaded into the groove 3.
Only the outer surface of the spherical layer 4 is in contact with the inner circumferential surface of the joint portion of the large-diameter rod body 2, that is, the non-contact recess 4b of the spherical layer 4 is interposed between the joint portions of the rod bodies 1 and 2. As a result, the contact area between the joints of the respective rod bodies 1 and 2 becomes small, and the contact area between the respective rod bodies 1 and 2 is reduced.
This prevents clumping between the two.

Further, the small diameter side rod main body 1 has the annular groove 3.
However, the spherical layer 4 whose thickness is approximately the same as the depth of the annular groove 3 is loaded inside the annular groove 3, and therefore the small diameter side rod body 1 This reduces the decrease in strength of the annular groove 3, and also prevents sand from entering the annular groove 3.

In providing the spherical layer 4, as shown in FIG. 2, the annular groove 3 is formed over a predetermined range in the length direction on the outer circumferential surface of the joint portion of the small diameter rod main body 1, The groove 3 may be loaded with the spherical layer 4 having the same width as the groove 3, and as shown in FIG. It is also possible to form a plurality of annular grooves 3 having a certain width at predetermined intervals and to load each of these grooves 3 with the spherical layer 4, as shown in FIG. A part of the constituent members of the small-diameter rod body 1 are left on the outer peripheral surface of the joint portion of the small-diameter rod body 1 so as to have an approximately X shape when viewed from the front, and the spherical layer 4 is loaded between the remaining members. It is okay to do so.

In the above embodiment, an annular groove 3 is formed on the outer circumferential surface of the connecting portion of the small diameter rod body 1 that is connected to the large diameter rod body 2, and the spherical layer 4 is loaded into the groove 3. However, in the present invention, as shown in FIG. 5, the small diameter rod body 1 of the large diameter rod body 2 is
The annular groove 3 may be formed on the inner circumferential surface of the connecting part where the spherical layer 4 is connected, and the spherical layer 4 may be loaded into the groove 3. A similar effect can be obtained.

(Effect of the invention) As explained above, in the fishing rod coupling structure according to the present invention, an annular groove 3 is formed on the circumferential surface of the coupling part on one side of the small diameter rod body 1 and the large diameter rod body 2. In this annular groove 3, a spherical layer 4 is loaded, in which a large number of microscopic hollow spheres are interposed in synthetic resin, and the surface thereof has a large number of non-contact recesses 4b that do not contact the circumferential surface of the other joint part. , the rod bodies 1 and 2 are not damaged due to the intrusion of sand, etc., and even though the annular groove 3 is provided, the decrease in strength of the rod bodies can be minimized. This makes it possible to sufficiently ensure the strength of the rod bodies 1 and 2 while preventing jamming between the joints of the rod bodies 1 and 2.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing a connecting structure of a fishing rod according to the present invention, Figs. 2 to 4 are front views showing an example of forming a spherical layer, and Fig. 5 is a cross-sectional view showing another embodiment of the present invention. It is. 1...Small diameter side rod body, 2...Large diameter side rod body, 3
...Annular groove, 4...Spherical layer, 4b...Non-contact recess.

Claims (1)

[Scope of utility model registration request] A connecting structure for connecting a small diameter rod body 1 formed into a gently conical shape using prepreg made of high-strength fibers impregnated with a synthetic resin and a large diameter rod body 2 formed into a gently conical hollow shape. An annular groove 3 is provided on the circumferential surface of the joining part on one side between the small diameter side rod body 1 and the large diameter side rod body 2, and a large number of micro hollow spheres are interposed in the synthetic resin in this annular groove 3, and the surface A connecting structure for a fishing rod, characterized in that a spherical layer 4 having a large number of non-contact recesses 4b which do not come into contact with the peripheral surface of the connecting part on the other side is provided.