JP2587734Y2 - Helmet cap - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a helmet (also referred to as a protective cap, a safety cap, etc.).

[0002]

2. Description of the Related Art Helmets are widely used in various factories and other workplaces, and certain standards are established in Japanese Industrial Standards for industrial safety helmets and Ministry of Labor helmets. The safety of is planned.

[0003] The types and shapes thereof are also various, but the mainstream is a substantially hemispherical shape made of glass fiber reinforced resin.

The major problems of the helmets conventionally used are weight and safety against flying and falling objects. Many of the helmets in practical use have a weight of 300 g or more in order to meet the above-mentioned standards, and the health impact on the human body, especially when worn for a long time, is considerable. In addition, despite the above-mentioned weight, safety against flying or falling objects cannot be said to be sufficient, and the development of a lighter and safer hat body is desired.

The present inventor has found that these problems can be solved by combining carbon fibers and polyarylate fibers, but has found that there are problems such as inferior finish workability at the circumferential end. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a helmet cap which is light in weight, is particularly excellent in safety against flying and falling objects, and has excellent finishing characteristics at the circumferential end, and is also excellent in smoothness and paintability.

[0007]

The helmet cap body of the present invention is obtained by laminating at least one polyarylate fiber prepreg layer and at least one carbon fiber prepreg layer, and molding and hardening the helmet cap. It is characterized by being constituted by an upper carbon fiber layer.

In manufacturing the helmet cap of the present invention, a carbon fiber prepreg and a polyarylate fiber prepreg are prepared. The prepreg is a sheet-like material for molding formed by impregnating a thermosetting resin such as an epoxy resin or an unsaturated polyester resin into a cloth such as a woven fabric made of each fiber, and laminating one or more prepregs to form a helmet cap. Molding and curing of the resin are performed by heating and pressing using a mold having

In the present invention, the circumferential end portion (A in FIG. 1) of the helmet cap is constituted by a carbon fiber layer instead of a polyarylate fiber layer. It is made larger than the prepreg so that the outer peripheral end of the laminate is composed of the carbon fiber prepreg layer. In particular, it is preferable to arrange a carbon fiber layer in the outermost layer to increase its size. FIG. 2 is an enlarged sectional view of an end portion, wherein 1 is a carbon fiber layer, and 2 is a polyarylate fiber layer. By increasing the size of the carbon fiber prepreg in the prepreg laminate, the shape becomes such that the carbon fiber layer covers the end of the polyarylate fiber layer after molding.

[0010] The hat-shaped molded product taken out from the mold after the molding and curing has a parison at the end and needs to be finished by sanding or the like. However, if polyarylate fiber is present at the end, the single fiber becomes fluffy. And make uniformization difficult. On the other hand, when the carbon fiber layer is arranged so as to wrap the polyarylate fiber at the end, uniform finishing can be easily performed by filing or the like. In particular, when the outermost layer is a carbon fiber layer and its end is lengthened, its effect is more remarkable and its physical properties such as strength are maximized, making it lighter and lighter than flying and falling objects. Uneven resistance is exhibited, and a flat surface free from fluffing or the like is obtained by polishing, and a uniform painted surface can be obtained with a small amount of paint used.

It is sufficient that the difference between the lengths of the end portions is about 1 to 10 mm. As the polyarylate fiber, an appropriate polyarylate fiber such as Vectran (produced by Kuraray Co., Ltd.) can be used.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a helmet cap.

FIG. 2 is an end sectional view of a helmet cap body.

[Explanation of symbols]

 1 carbon fiber layer 2 polyarylate fiber layer

Claims (2)

(57) [Scope of request for utility model registration] 1. A lamination of at least one polyarylate fiber prepreg layer and at least one carbon fiber prepreg layer, molding and curing, and the circumferential end of the cap body is substantially constituted by a carbon fiber layer. A helmet cap body characterized by the following. 2. The helmet cap according to claim 1, wherein the carbon fiber layer constitutes an outermost layer, and an end of the outermost layer is longer than an end of the polyarylate fiber layer.