JPS6130841Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fiber-reinforced synthetic resin prop mainly used for agricultural and horticultural purposes.

Conventionally, fiber-reinforced synthetic resin struts have been used as rod-shaped objects made of reinforcing fiber bundles impregnated with thermosetting resin;
Some of these rod-shaped objects were coated with synthetic resin such as polyethylene.

However, the former rod-shaped object is generally a fiber bundle impregnated with a thermosetting resin and pultruded into a predetermined shape through a molding die, and when it passes through the molding die, the cross section expands somewhat and the fiber bundle Air is easily trapped in the resin and the strength and rigidity are not sufficient. In addition, in the case of the latter rod-shaped object coated with synthetic resin, there is no adhesion between the rod-shaped object and the coating resin, and when the rod-shaped object is bent or driven into the soil, the coating resin shifts from the rod-shaped object and the rod-shaped object is damaged. The disadvantage was that the fibers were exposed and could easily get stuck in the hands or body.

In view of these conventional drawbacks, the present inventor has made extensive efforts to provide a fiber-reinforced synthetic resin strut that eliminates the above-mentioned drawbacks.

An embodiment of the present invention will be described below with reference to the drawings.

In the drawings, 1 is a rod-shaped core material, 2 is a protrusion, and 3 is a coating layer.

In the rod-shaped core material 1, reinforcing fibers such as glass fibers, polyamide fibers, polyester fibers, and natural fibers are impregnated with uncured thermosetting resin such as polyester resin, epoxy resin, and phenolic resin, and the fibers are They are formed by being aligned. or,
The cross-sectional shape of the core material 1 is not particularly limited, and may be circular, oval, square, or the like.

The protrusion 2 is formed by integrally winding a fiber bundle similar to the above-mentioned reinforcing fiber on the outer peripheral wall of the core material 1. The shape of the protrusion 2 may be spiral as shown in FIG. 1, or knot-like as shown in FIG.

The covering layer 3 is formed by covering the core material 1 in the length direction with a synthetic resin such as polyethylene, polypropylene, polyamide, polyvinyl chloride, or the like.
Further, the coating layer 3 may be formed of not only the above-mentioned thermoplastic resin but also a thermosetting resin. Furthermore, irregularities or protrusions may be formed on the surface of the coating layer 3.

As described in detail above, in the strut of the present invention, reinforcing fibers impregnated with a thermosetting resin are aligned in the length direction to form a rod-shaped core material, and fiber bundles similar to the above fibers are attached to the outer peripheral wall of the core material. Since the core material is wound in an integrated manner, it is possible to improve the bundle strength of the fibers without entraining air during molding as in the conventional method, and it is also possible to prevent the core material from becoming hung up even if the fibers are cut. .

In addition, spiral or knot-shaped protrusions are formed on the outer peripheral wall of the core material, and a synthetic resin coating layer is formed along the length of the core material, so the coating layer does not shift from the core material, unlike conventional methods. The fibers of the core material are not exposed and will not injure your hands or body.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing one embodiment of the strut according to the present invention, and FIG. 2 is a partially cutaway perspective view showing another embodiment of the strut according to the present invention. 1...Core material, 2...Protrusion, 3...Coating layer.

Claims (1)

[Scope of utility model registration request] Reinforcing fibers impregnated with a thermosetting resin are aligned in the length direction to form a rod-shaped core material 1.
A fiber-reinforced synthetic material in which a fiber bundle similar to the above-mentioned fibers is wound and integrated on the outer peripheral wall of the core material 1 to form spiral or knot-like protrusions 2, and a synthetic resin coating layer 3 is formed over the length of the core material 1. Resin strut.