JPS61135732A - Manufacture of fishing rod - Google Patents

Abstract

PURPOSE:To prevent breakage of jointing section due to jointing operation or shock by a method wherein the small piece of prepreg, whose width is corresponding to the circumferential length of the jointing section and which is formed by arranging the bundles of large diametral reinforcing fibers in the circumderential direction of a mandrel with predetermined spaces under impregnating thermosetting resin thereinto, is laminated on and wound around the jointing section. CONSTITUTION:The prepreg 1 fro constituting the tubular fishing rod, which is formed by impregnating the thermosetting synthetic resin, such as epoxy resin, polyester resin or the like, into the reinforcing fibers consisting of the orientated sheet or fabric of carbon fibers, glass fibers or the like, is wound around the mandrel 2, thereafter, the small piece 5 of the prepreg, whose width is corresponding to the circumferential length of the jointing section and which is formed by impregnating the same or same series thermosetting synthetic resin as the resin impregnated into the prepreg 1 into the reinforcing fibers 4 in which the bundles 3 of large diametral fibers are arranged in the circumferential direction of the mandrel 2 with predetermined spaces, is laminated on and wound around the jointing section. The small piece 5 of prepreg, wound around the jointing section, is bound by a tape and the surface thereof is processed by thermosetting process as a normal rod, subsequently, the mandrel 2 is withdrawn, thereafter, a protrusion 7, formed by the large diametral fibers 3, is ground so as to meet with the fishing rod 8 to be jointed and engaged whereby the jointing section may be formed on the fishing rod 9.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION The present invention relates to a method of manufacturing a fishing rod having a joint.

Conventional fishing rod fitting joints have the disadvantage that if they are deeply and firmly fitted beyond the specified joint width, it may become impossible to remove or the fishing rod joint may be damaged. This tendency is particularly likely to occur in the case of thin-walled rods or when moisture adheres to the joint surface.

As a means to prevent such defects, it is known from Japanese Utility Model Publication No. 58-41831 to form a groove by winding a sheet or fiber thread of the same material in a circular or spiral shape at the joint. However, since the sheets or fiber threads must be positioned and wound at predetermined intervals each time, the manufacturing process is cumbersome and time-consuming. However, air is trapped in the fine irregularities, which become bubbles during the heat curing process, impeding airtightness, causing delamination between the tubular body and the spiral protrusion, and hindering the joining operation. There is a defect in which the joints are damaged due to shock or impact.

DESCRIPTION OF THE INVENTION The present invention relates to a fishing rod manufacturing method that prevents such defects in the joints of fishing rods.

Prepreg, which has reinforcing fibers impregnated with thermosetting synthetic resin, is wrapped around a core metal, and large-diameter fiber bundles are arranged at predetermined intervals in the circumferential direction of the core metal on the outside of the base.Thermosetting synthetic resin is applied to the reinforcing fibers. After one roll of the impregnated Bripreg small piece is wrapped, it is bound by taping, heat hardened, and cored metal removed using conventional methods to form uneven stripes at the joint of the fishing rod. That is.

To explain the present invention in detail, epoxy resin is added to reinforcing fibers made of aligned sheets or woven fabrics of carbon fibers, glass fibers, etc.
A prepreg 1 for forming a rod tube, which is formed by impregnating a thermosetting synthetic resin such as polyester resin, is wound around a core bar 2 and then attached to the outside of its base.

One roll of prepreg small pieces 5 formed by impregnating reinforcing fibers 4 in which large-diameter fiber bundles 3 are arranged at predetermined intervals in the circumferential direction of the core bar 2 with a thermosetting synthetic resin equivalent to or similar to the prepreg is polymerized. wrap around.

As shown in FIGS. 6 and 7, the prepreg pieces 5 include large-diameter fiber bundles arranged at regular intervals on the warp of reinforcing fibers 4 made of plain weave, satin weave, etc. woven with carbon fibers, glass fibers, etc. 3 knitted and impregnated with thermosetting synthetic resin,
Alternatively, between the scrim sheets 6 (see Fig. 8) which are pre-impregnated with a thermosetting synthetic resin, or between the scrim sheets 6 (see Fig. 9), or on the surface of the scrim sheet 6 (see Fig. 9), a large-diameter sheet which is also impregnated with a thermosetting synthetic resin may be used. It is preferable to use a fiber bundle 3 glued together, and in the present invention, the circumferential direction of the core metal of the large diameter fiber bundle 3 means not only a circular winding as shown in FIG. This also includes the case where the prepreg is wound in a spiral shape as shown in 4@, and when the prepreg small piece 5 is wound, the prepreg 1 may be wound around the core bar 2 and then wound. prepreg 1 in advance
There is no problem even if the prepreg small piece 5 is bonded to the core bar 2 and then wrapped around the core bar 2.

However, the surface of the lever wrapped around the core bar 2 is bound with tape as usual and heat-cured, then the core bar 2 is removed, and then the protrusion formed by the large diameter fiber bundle 3 is 7 is ground to match the fishing rod 8 to which the joint is to be fitted, thereby forming a joint part on the fishing rod 9.

Effects of the Invention The present invention, when winding the prepreg constituting a fishing rod around a core metal, wraps one roll of small prepreg pieces in which thick, large-diameter fiber bundles are arranged at predetermined intervals in the circumferential direction of the core metal on the outside of the base of the prepreg. Since it is wrapped around the fishing rod, it is possible to form an uneven strip of a predetermined width on the joint part of the fishing rod, and it is possible to prevent the joint part from coming into close contact with each other and prevent the joint part from becoming unremovable or being damaged. Since it is simply winding small pieces of prepreg, it can be wrapped smoothly and tightly onto the prepreg that makes up the fishing rod.The manufacturing process is extremely simple, and the spacing between the uneven strips can be maintained at a specified level, making it possible to maintain the joint part of each year. Equalize the fit.

Moreover, it has excellent features such as being able to reinforce the strength of the joint, allowing efficient mass production of fishing rods with joints.

[Brief explanation of the drawing]

Figure 1 is a slope view before winding, showing the manufacturing process of the present invention;
3 is a partially cutaway front view of a fishing rod according to the present invention, FIG. 4 is a slope view of another embodiment of the present invention before winding, and FIG. 5 is a slope view of the same fishing rod after winding. 6 is a partially cutaway front view, FIG. 6 is an oblique view of reinforcing fibers of a small prepreg piece of the present invention, FIG. 7 is a side view of the same, and FIGS. 8 and 9 are oblique views of an embodiment of the prepreg small piece, respectively. be. 1... prepreg, 2... core metal, 3... large diameter fiber bundle. 4... Reinforcing fiber, 5... Small prepreg piece, 9...
·fishing rod.

Claims (1)

[Claims] Prepreg, which has reinforcing fibers impregnated with thermosetting synthetic resin, is wrapped around a core metal, and large-diameter fiber bundles are arranged at predetermined intervals in the circumferential direction of the core metal on the outside of the base.Thermosetting synthetic resin is applied to the reinforcing fibers. After one roll of impregnated and formed prepreg pieces is polymerized and wound, a concavo-convex strip is formed at the fishing rod joint by performing a binding process by taping, a thermosetting process, and a core metal removal process using conventional methods. A method of manufacturing fishing rods.