JP2000110021A - Complex helmet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further improve impact resistance and weight saving of a helmet comprising a plastic or a metal by detachably attaching or fixing a hollow formed material to a helmet main body. SOLUTION: This helmet composed of a plastic or a metal is obtained by attaching or fixing a hollow symmetric pseudo-truncated cone formed material 2, obtained by cutting off a truncated cone-shaped formed material vertically to the bottom with sandwiching the bottom central line of the truncated cone in fixed width and bonding and integrating the residual truncated cone, to the outside of a helmet main body 1 so as to have the external shape of the formed material made along the external shape of the helmet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a helmet body made of plastic or metal, which is cut at a constant width perpendicular to the bottom surface with a center line at the bottom of the truncated cone so that the outer shape follows the helmet shape. By mounting or fixing a hollow molded product that is a symmetrical pseudo-conical shape that is formed by joining and integrating the remaining truncated cones, if a high-speed flying object is received from the outside, a partial Absorbs the energy of flying objects by destruction, effectively prevents damage to the helmet body and dents on the inner surface, has good impact resistance to high-speed flying objects, and approximates the helmet body and its shape It is made of a hollow molded product with a symmetrical pseudo-conical shape, so the volume of the hollow molded product is small, and because it is thin, it is lightweight and it is detachable. It relates to Tsu door.

[0002]

2. Description of the Prior Art It is now well known that helmets can be impact resistant to objects falling from high places or flying objects. However, when the impact force is large, it is often impossible to reduce the impact force with a helmet alone, and in some cases, the ceramic is fixed via a hollow frusto-conical shaped product (spacer). When I was wearing it, I felt heavily lacked operability. Also, once the ceramic with the truncated cone-shaped molding is fixed to the helmet, it is difficult to remove it later, and even if there is no danger of a falling object with a large impact force or an object flying at high speed, the weight is large. I had to wear my helmet all the time.

[0003]

SUMMARY OF THE INVENTION The inventor of the present invention has proposed a method in which the outer surface of a helmet body made of plastic or metal is fixed at a constant angle perpendicular to the bottom surface with the center line of the bottom surface of the truncated cone interposed therebetween so that the outer shape follows the outer shape of the helmet. By mounting or fixing a hollow molded product that is cut in width and has a symmetrical pseudoconical frustum shape in which the remaining truncated cone is joined and integrated, even if it receives a strong impact force, the destructive energy will reduce this hollow molded product. A symmetrical pseudo-cone that has excellent shock resistance that can effectively prevent swelling of the inner surface of the helmet while relaxing the impact force on the helmet body made of plastic or metal because it is transmitted to the helmet through The use of a hollow molded article has led to the completion of a lightweight composite helmet.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a helmet made of plastic or metal. The helmet is hollow on the outer surface of the helmet main body, and has a truncated conical bottom surface centered on the outer surface of the helmet. A composite helmet characterized by mounting or fixing a molded product (hereinafter, referred to as a hollow molded product) having a symmetrical pseudo-conical shape in which the bottom is cut out at a constant width vertically and the remaining truncated cone is joined and integrated. It is about. In the present invention, the hollow molded article is a molded article having a hollow portion penetrating vertically.
Preferably, the present invention relates to a composite helmet, wherein the inner surface of the hollow molded article has the same shape as the outer surface of the helmet body. Further, preferably, the hollow molded article is a combined pseudo-conical frustum in which two or more types of pseudo-conical frustums are vertically stacked such that their joint surfaces coincide with each other so that the external shape of the hollow molded article follows the external shape of the helmet body. It is about composite helmets. Further, the present invention relates to a composite helmet in which this hollow molded product has a laminated structure of two or more layers made of the same material or different materials, and furthermore, the longitudinal direction of the hollow molded product is the front-rear direction of the helmet body, and the short direction is the short direction. The present invention relates to a composite helmet in which the helmet body is in the left-right direction, and further relates to a composite helmet in which the hollow molded article is divided into two or more divided bodies and a hollow molded article is formed by combining these divided bodies. Further, preferably,
The present invention relates to a composite helmet in which a hollow molded article is detachably mounted or fixed to a helmet body.

The helmet body used in the present invention may be any helmet which is generally called a helmet, but is preferably a construction safety helmet, a riding safety helmet, a schoolchild safety helmet, and an impact-resistant helmet. Hats, bulletproof caps, etc. The helmet body is made of plastic or metal. As the material of the plastic, all materials used for manufacturing a helmet are applicable, and preferably, a material composed of a single resin such as ABS, polycarbonate and polyethylene, a mixture thereof and a composite layer of two or more types, or A material composed of a resin and a reinforcing material, such as a simple substance of FRP (general glass fiber, nylon fiber and polyester fiber reinforced plastic) and ACM (advanced composite material, that is, high-strength fiber reinforced plastic) or a composite thereof. . On the other hand, the material of the metal is not particularly limited, but is preferably a simple substance such as titanium, titanium alloy, soft iron, high-strength steel sheet, stainless steel, aluminum or duralumin, an alloy thereof, and a composite thereof.

In the above-mentioned ACM, the high-strength fiber used has a specific tensile strength obtained by dividing the tensile strength by the density of 10%.
× 10 ⁸ cm or more, and specific elastic modulus obtained by dividing elastic modulus by density is 2.5 × 10 ⁸ cm or more. Specifically, examples thereof include high-strength glass fiber, aramid fiber, aromatic polyester fiber, high-strength polyethylene fiber, high-strength nylon fiber, and polyparaphenylenebenzobisoxazole (commonly called PBO) fiber. General glass fiber, nylon fiber, polyester fiber, etc. are not applicable. When a fiber having a specific tensile strength or a specific elastic modulus equal to or less than the above value is used, the impact resistance of the helmet body is not always sufficient. On the other hand, the resin to be impregnated or coated on these high-strength fibers is usually a thermosetting resin such as a phenol resin, an epoxy resin, a polyurethane resin, an unsaturated polyester resin, a vinyl ester resin and a polyimide resin;
Alternatively, thermoplastic resins such as polyolefins such as polyethylene and polypropylene, polyamides, polyesters, polyvinyl acetate, polyether ether ketone, thermoplastic polyurethanes, and thermoplastic elastomers, and synthetic rubbers are used.

In order to obtain ACM, in the case of a thermosetting resin,
A prepreg is prepared by impregnating or coating a high-strength fiber with a thermosetting resin, a plurality of prepregs are stacked, and a compression molding method in which heat and pressure are applied, or a hand lay-up method in which a prepreg is not formed is used. Resin content is 5-80
% (% By weight, hereinafter the same) can be used, but usually 5 to 50%, preferably 5 to 50% for excellent impact resistance.
30%. In the case of a thermoplastic resin, a high-strength fiber is usually impregnated or coated with a thermoplastic resin solution, powder or a dispersion thereof to prepare a prepreg, and a plurality of prepregs are stacked and heated and pressed by a hot plate or a heating roll. There is a compression molding method and the like. At this time, the content of the resin is 5 to 80%.
(% By weight, the same applies hereinafter), but usually 5 to 50
%, Preferably 5 to 30% for excellent impact resistance. If it is less than 5%, it is difficult to make prepreg,
Even if it exceeds 80%, it is difficult to produce a prepreg, and the impact resistance is reduced.

On the other hand, the hollow molded article is a molded article made of a thermosetting or thermoplastic resin such as FRP, ACM or a resin alone or a metal, and has a high surface hardness.
It is desirable to have high mechanical strength characteristics including impact strength, weather resistance, and light weight. Typical plastics include phenolic resins, epoxy resins, unsaturated polyester resins, vinyl ester resins, and urethane resins as thermosetting resins; polycarbonate resins, acrylic resins, ABS resins, polyethylene resins as thermoplastic resins. It is a simple substance such as a polypropylene resin or a composite thereof. As fibers and resins used for FRP and ACM, those used for the helmet body are generally used. Similarly, as the metal, a material used for the helmet body is generally used.

In the composite helmet of the present invention, the hollow molded article mounted or fixed on the outer surface of the helmet main body has a constant width perpendicular to the bottom surface across the center line of the bottom surface of the truncated cone so that the outer shape follows the outer shape of the helmet. The shape is a symmetrical pseudo-conical truncated cone in which the remaining truncated cones are joined and integrated.
By adopting such a shape, the appearance of the molded product is very similar to the shape of the helmet body, and the thickness of the molded product is relatively uniform, so that necessary impact resistance is secured and weight reduction is achieved. . As for the shape of the hollow molded product, it is preferable that the inner surface has the same shape as the outer surface of the helmet body. In this case, the hollow molded article can be mounted on the helmet body without any gap, and therefore, the impact resistance of the composite helmet is further improved, the stability at the time of mounting the hollow molded article is good, and the operability is excellent. Become.

It is preferable that the hollow molded article is divided into two or more parts, which are combined with a pseudo-conical truncated cone and mounted on the helmet body. In this case, when not mounted, the volume of the divided body becomes compact, which is convenient for carrying. The divided bodies are usually detachably mounted and fixed to the helmet body, but it is preferable that the contact portions of the adjacent divided bodies have an appropriate overlapping structure. Furthermore, the impact resistance is usually improved by forming the hollow molded article into a laminated structure of two or more kinds of the same material or different materials, for example, a material having excellent impact strength and weather resistance on the surface. By using a light-weight helmet that has little deformation on impact inside and has a good impact resistance and weather resistance as a whole, a lightweight helmet can be obtained.

As a method of fixing the hollow molded article obtained by the above method to the helmet main body, the inner surface of the hollow molded article and the surface of the helmet main body may be fixed to the resin used for the hollow molded article or a synthetic rubber-based material. Or an adhesive such as epoxy resin or urethane resin or an adhesive such as a double-sided tape, or a method of attaching a magic tape to the inner surface of the hollow molded article and the surface of the helmet body and fixing the both. In some cases, mechanical joining using bolts, rivets, or the like is also possible. The simplest method of attachment and detachment is to simply fit them together, or to fix and join a magnet or magic tape to the hollow molded article and the helmet body.

The composite helmet thus obtained is
For example, when an object with a large impact force or a high-speed flying object collides, the hollow molded article first breaks down, and the collision object that lost energy rapidly and the fragments of the hollow molded article reach the helmet main body, so the helmet main body The direct impact is small, the swelling on the inner surface of the helmet due to the impact is small, and it is possible to hardly damage the head. In addition, since the hollow molded article can be detachably attached to the helmet body, it is attached when necessary, and removed when not needed, to reduce the load on the head and to reduce the burden on the head, and to improve operability during use. Can be greatly improved. Furthermore, by making the hollow molded article symmetrical, the balance when mounted on a helmet can be improved, which is important in terms of function and operability.

Hereinafter, specific examples of the composite helmet of the present invention will be described with reference to the drawings. Figure 1 shows the outer surface of the helmet body,
A pseudo cone that is hollow and cut at a fixed width perpendicular to the bottom face across the bottom center line of the truncated cone so that the outer shape follows the outer shape of the helmet, and the remaining truncated cone is joined and integrated so as to be symmetrical left and right A case where a trapezoidal hollow molded article is attached is shown, (a) is a side view, (b) is a plan view, and (c) is a vertical plane symmetrically with a constant width (T) at a central portion of a cone (T). FIG. 3D is a plan view of the pseudo cone, in which the cone (W) remaining after the cutting is joined so as to be symmetrical. In FIG. 1, 1 is a helmet main body, and 2 is a pseudo-conical frustum hollow molded article. FIG. 2 shows a case where the pseudo-cone-shaped hollow molded product divided into four parts is fixed to the helmet main body, 1 is a helmet main body, and 3 is a divided body of the pseudo-cone-conical hollow molded product. FIG. 3 shows a case in which a hollow molded product obtained by combining four divided pseudo-cone-shaped hollow molded products made of two kinds of different materials is mounted on a helmet main body.
Numerals 4 and 5 denote pseudo-conical frustoconical hollow moldings made of different materials. Fig. 4 shows two types of pseudo-conical frustum hollow molded products with different external shapes stacked up and down so that their joint surfaces coincide with each other so that the external shape of the molded product follows the external shape of the helmet body. 1 is a helmet body, and 6 is a pseudo-conical frustum hollow molded product. FIG. 5 shows a state in which two types of two differently formed pseudo-conical frustoconical hollow molded products of different materials having different external shapes along the external shape of the helmet body are vertically stacked and integrated into a helmet. Reference numeral 1 denotes a helmet body, and reference numerals 7 and 8 denote pseudo-conical frustoconical hollow moldings made of different materials. FIG. 6 shows a pseudo-conical truncated cone hollow molding in which two types of pseudo-conical truncated cones of different materials obtained by stacking two types of pseudo-conical truncated cones having different outer shapes along the outer shape of the helmet body are stacked and integrated. The figure shows a state in which the object is mounted on the helmet body, 1 is a helmet body, and 9 and 10 are pseudo-conical frustoconical hollow moldings made of different materials, respectively. FIG. 7 shows a case where three types of pseudo-conical frusto-conical hollow moldings having different external shapes are stacked and integrated into a helmet main body, 1 is a helmet main body, and 11 is a pseudo-conical frustum-cone hollow molding. .

[0014]

As is clear from the above description, the composite helmet of the present invention has excellent impact resistance against objects falling from high places or objects flying at high speed, and has a hollow structure. By making the molded article detachable, operability can be improved. Furthermore, the hollow molded article attached or fixed to the outer surface of the helmet body is cut at a constant width perpendicular to the bottom surface across the center line of the bottom of the truncated cone so that the outer shape follows the outer shape of the helmet, and becomes symmetrical. The shape of the molded product is very similar to the shape of the helmet,
Since the thickness of the molded article can be made uniform, the weight of the composite helmet can be reduced.

[Brief description of the drawings]

FIG. 1 shows a case in which a hollow molded article having a symmetrical pseudo-conical frustum shape is mounted on the outer surface of a helmet body, (a) is a side view, (b) is a plan view, and (c) is a central portion of a cone. The constant width
(D) A plan view when the plane is cut symmetrically into a vertical plane in (T), (d)
FIG. 4 is a plan view of a pseudo-cone in which cones (W) remaining after being cut off are joined so as to be symmetrical.

FIG. 2 shows a case where a pseudo truncated conical hollow molded product divided into four parts is fixed to a helmet body, (a) is a side view,
(B) is AA sectional drawing.

FIG. 3 shows a case in which a hollow molded product obtained by combining four divided pseudo-truncated conical hollow molded products is mounted on a helmet main body, (a) is a side view, (b) is a cross-sectional view taken along AA, (C) is a plan view.

FIG. 4 shows a case where two types of pseudo-frustro-conical hollow moldings having different outer shapes are vertically stacked so that their joint surfaces coincide with each other, and an integrated hollow molding is mounted on a helmet body;
(A) is a side view, (b) is an AA cross-sectional view, and (c) is a plan view.

FIG. 5 shows a case where a two-part pseudo frustoconical hollow molded product made of two kinds of different materials having different outer shapes is vertically stacked so that the joining surfaces thereof coincide with each other, and an integrated hollow molded product is mounted on a helmet body. (A) is a side view,
(B) is an AA sectional view, and (c) is a plan view.

FIG. 6 shows a case in which a hollow molded article formed by laminating two pseudo-cone-shaped frustum hollow molded articles made of different kinds of materials having different outer shapes is mounted on a helmet body, (a) is a side view, and (b) is a side view; Is a sectional view taken along the line AA, and FIG.

FIG. 7 shows a case in which three types of pseudo-cone-shaped truncated cone hollow molded products having different external shapes are stacked up and down so that their joining surfaces coincide, and an integrated hollow molded product is mounted on a helmet body;
(A) is a side view, (b) is AA sectional drawing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Helmet main body 2 Pseudo frustoconical hollow molded article 3 Divided body of pseudo frustoconical hollow molded article 4, 5 Divided body of pseudo frustoconical hollow molded article 6 Pseudoconical frustoconical hollow molded article 7, 8 Division of pseudo frustoconical hollow molded article Body 9,10 Pseudo frustoconical hollow molded article 11 Pseudofrustoconical hollow molded article

Claims (7)

[Claims] 1. A helmet made of plastic or metal, which is hollow on the outer surface of the helmet body and has a constant width perpendicular to the bottom surface with the center line of the bottom surface of the truncated cone interposed therebetween so that the outer shape follows the outer shape of the helmet. A composite helmet comprising: attaching or fixing a molded product having a symmetrical pseudo-conical shape in which a cut-out and remaining conical shape is joined and integrated. 2. The composite helmet according to claim 1, wherein the inner surface of the molded product has the same shape as the outer surface of the helmet body. 3. The composite helmet according to claim 1, wherein the molded article has a shape in which two or more types of pseudo-cone frustums are vertically stacked and integrated so that the outer shape of the molded product follows the outer shape of the helmet body. 4. A molded product having a laminated structure of two or more layers made of the same material or different materials.
The composite helmet as described. 5. The composite helmet according to claim 1, wherein the longitudinal direction of the molded article is the front-rear direction of the helmet body, and the lateral direction is the left-right direction of the helmet body. 6. The composite helmet according to claim 1, wherein the molded product is a combination of two or more divided bodies. 7. The helmet body according to claim 1, wherein said molded article is detachably mounted or fixed to said helmet body.
The composite helmet as described.