JPH0642927U - Helmet hat body - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a helmet cap body that is lightweight, safe, and has excellent end characteristics. [Structure] One or more polyarylate fiber prepreg layers and one or more carbon fiber prepreg layers are laminated, molded and cured, and the circumferential end portion of the cap body is constituted by the carbon fiber layers.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cap body of a helmet (also referred to as a protective cap, a safety cap, etc.).

[0002]

[Prior art and its problems]

 Helmets are widely used in various factories and other workplaces, and certain standards have been established, such as the standards for industrial safety caps in the Japanese Industrial Standards and the standards for protective caps of the Ministry of Labor, to ensure the safety of the wearer. There is.

Although there are various types and shapes, the mainstream is a substantially hemispherical shape made of glass fiber reinforced resin.

[0004] The major problems of the helmets used conventionally are weight and safety against flying and falling objects. Most 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 effects on the human body especially when worn for a long time are considerable. In addition, despite the above weight, it cannot be said that safety is sufficient for flying and falling objects, and development of a lighter and safer cap body is desired.

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

An object of the present invention is to provide a helmet cap body which is light in weight, particularly excellent in safety against flying / falling objects, and excellent in finish processing characteristics of a circumferential end portion, smoothness, and paintability.

[0007]

Means for Solving the Problems The helmet cap body of the present invention is formed by laminating at least one polyarylate fiber prepreg layer and at least one carbon fiber prepreg layer, and molding and curing the same, and the circumferential end portion of the cap body is substantially formed. It is characterized by being constituted by an upper carbon fiber layer.

In manufacturing the helmet cap body of the present invention, carbon fiber prepreg and polyarylate fiber prepreg are prepared. A prepreg is a molding sheet made by impregnating a fabric such as a woven fabric with a thermosetting resin such as an epoxy resin or an unsaturated polyester resin. One or more prepregs are laminated to form a helmet cap shape. 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 body is constituted by the carbon fiber layer instead of the polyarylate fiber layer. For this purpose, at least one carbon fiber prepreg has a dimension of It is made larger than the arylate fiber prepreg so that the outer peripheral end of the laminate is composed of a carbon fiber prepreg layer. In particular, it is preferable to dispose a carbon fiber layer as the outermost layer and increase its size. FIG. 2 is an enlarged cross-sectional view of an end portion, where 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 carbon fiber layer covers the end of the polyarylate fiber layer after molding.

The cap-shaped molded product taken out from the mold after the molding and curing needs to be finished by a parison or the like at the end and being sanded, but when the polyarylate fiber is present at the end, the single fiber becomes fluff. It remains in a shape and makes uniformization difficult. On the other hand, if the carbon fiber layer is arranged so as to enclose the polyarylate fiber at the end, uniform finishing can be easily performed by sanding. In particular, when the outermost layer is a carbon fiber layer and its ends are long, the effect is more remarkable, and the physical properties such as strength are maximized, making it lighter and more conventional than flying and falling objects. It is possible to obtain a uniform coated surface with a small amount of paint used by giving a flat surface free from fuzz and the like by exhibiting resistance not to be exhibited.

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

[Brief description of drawings]

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

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

[Explanation of symbols]

 1 carbon fiber layer 2 polyarylate fiber layer

Claims (2)

[Scope of utility model registration request] 1. A cap formed by laminating at least one polyarylate fiber prepreg layer and at least one carbon fiber prepreg layer, molding and curing, and substantially forming the circumferential end portion of the cap body by the carbon fiber layer. Helmet hat body characterized by. 2. The helmet cap body according to claim 1, wherein the carbon fiber layer constitutes an outermost layer, and an end portion of the outermost layer is longer than an end portion of the polyarylate fiber layer.