JPH05287603A - Helmet - Google Patents

Abstract

PURPOSE:To make a helmet lighter by improving the penetration resistance of the helmet and making the thickness of the helmet body thinner. CONSTITUTION:A flexible fabric member 5 is sandwiched between the helmet body 1 and a cushioning member 3. When a penetration material is allowed to penetrate the helmet body 1, the fabric member 5 is forced to come into contact with the cushioning member 3 under pressure by the permeation material in a state where the permeation material is sandwiched between the helmet body 1 and the cushioning member 3. The fabric member is drawn and bent by the penetration material in that state and, therefore, the forward force of the permeation material is distributed to the whole fabric member 5. Since the forward movement of the penetration material is consequently hindered by the fabric member 5, the penetration material can be prevented from readily penetrating the cushioning member 3. Therefore, penetration resistance is secured even if the thickness of the helmet body 1 is made thinner.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、人間の頭部を衝撃から
保護するヘルメットに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a helmet for protecting a human head from impact.

【０００２】[0002]

【従来の技術】自動二輪車の乗車時に着用が義務づけら
れているヘルメットは、その外殻を形成する帽体と、こ
の帽体の内側に装着されたプラスチック発泡体製の緩衝
材等とから形成され、外部からの衝撃を帽体と緩衝材と
で二段階に受け止めるように構成されていた。2. Description of the Related Art A helmet, which must be worn when riding a motorcycle, is made up of a cap body that forms the outer shell of the helmet, and a cushioning material made of plastic foam and the like that is mounted inside the cap body. , It was configured to receive the impact from the outside in two steps with the cap body and the cushioning material.

【０００３】この種の従来のヘルメットとしては、例え
ば特開昭６２−２５７４１０号公報に開示されたものが
ある。この公報に示されたヘルメットは、小型化を図る
観点から緩衝材の肉厚を薄くしても十分に衝撃を和らげ
ることができるように、帽体と緩衝材との間にゲル状の
衝撃吸収物質が介在されていた。すなわち、その衝撃吸
収物質が帽体から緩衝材に伝わる衝撃を和らげると共に
広範囲にわたって分散させるため、緩衝材は衝撃を比較
的広い面で受けることができ、緩衝材の肉厚を薄くする
ことができる。An example of this type of conventional helmet is disclosed in Japanese Patent Laid-Open No. 62-257410. The helmet disclosed in this publication has a gel-like shock absorption between the cap body and the cushioning material so that the cushioning material can be sufficiently softened even if the cushioning material is thinned from the viewpoint of downsizing. There was material intervening. That is, since the shock absorbing material absorbs the shock transmitted from the cap body to the cushioning material and disperses the shock over a wide range, the cushioning material can receive the shock on a relatively wide surface and can reduce the thickness of the cushioning material. ..

【０００４】[0004]

【発明が解決しようとする課題】しかるに、このように
衝撃吸収物質を帽体と緩衝材との間に介装したヘルメッ
トでは、上述したように耐衝撃性を高めつつ小型化が可
能になるものの、重量を大幅に減少させることはできな
かった。However, in the helmet in which the shock absorbing material is interposed between the cap body and the cushioning material as described above, it is possible to reduce the size while improving the shock resistance as described above. , The weight could not be reduced significantly.

【０００５】これは、ヘルメットの耐衝撃性および耐貫
通性がそれぞれ日本工業規格（ＪＩＳ Ｔ８１３３）で
定められた条件を満たさなければならないからであっ
た。なお、耐貫通性を測るに当たっては、先端が尖った
指定重量の重りを指定高さ位置からヘルメットへ自然落
下させ、その重りの先端がヘルメット内に貫入した寸法
を測る手法が採られている。This is because the impact resistance and penetration resistance of the helmet must satisfy the conditions defined by Japanese Industrial Standards (JIS T8133), respectively. In measuring penetration resistance, a method is used in which a weight with a specified weight having a sharp tip is naturally dropped from a specified height position onto a helmet, and the dimension at which the tip of the weight penetrates into the helmet is measured.

【０００６】すなわち、従来のヘルメットでは耐衝撃性
は前記条件を満たしているものの、耐貫通性の条件を満
たすためには帽体の厚みをある程度確保しなければなら
ず、帽体を薄く形成して軽量化を図るにも限度があっ
た。ヘルメットの重量が重いと、そのヘルメットを着用
した者は疲労しやすくなるばかりか重心が高くなってし
まう。That is, in the conventional helmet, although the impact resistance satisfies the above-mentioned conditions, the thickness of the cap body must be secured to some extent in order to satisfy the condition of the penetration resistance, and the cap body is formed thin. There was a limit to the weight reduction. If the weight of the helmet is heavy, not only the person wearing the helmet is easily tired but also the center of gravity becomes high.

【０００７】[0007]

【課題を解決するための手段】本発明に係るヘルメット
は、帽体と緩衝材との間に、柔軟性を有する布状部材を
介装したものである。A helmet according to the present invention has a flexible cloth member interposed between a cap body and a cushioning material.

【０００８】[0008]

【作用】布状部材は貫通物が帽体を貫通したときに帽体
と緩衝材とによって挟まれたまま貫通物によって緩衝材
に圧接され、その状態で貫通物によって引っ張られて撓
むから、貫通物が進もうとする力は布状部材の全体に分
散される。When the penetrating object penetrates the cap body, the cloth-like member is pressed against the cushioning material by the penetrating object while being sandwiched between the cap body and the cushioning material, and in that state, the penetrating object is pulled and bent. The force that the penetrating body tries to travel is distributed throughout the cloth-like member.

【０００９】[0009]

【実施例】以下、本発明の一実施例を図１および図２に
よって詳細に説明する。図１は本発明に係るヘルメット
の断面図、図２は本発明に係るヘルメットに耐貫通性試
験を行った結果を示すグラフである。なお、本実施例で
は自動二輪車用のヘルメットに本発明を適用した例につ
いて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a cross-sectional view of a helmet according to the present invention, and FIG. 2 is a graph showing results of a penetration resistance test performed on the helmet according to the present invention. In this embodiment, an example in which the present invention is applied to a motorcycle helmet will be described.

【００１０】図１において、１はヘルメットの外殻を形
成するフルフェイス形の帽体で、この帽体１は、例えば
繊維強化樹脂（ＦＲＰ），ポリカーボネート樹脂あるい
は不飽和ポリエステル樹脂等とから形成されている。In FIG. 1, reference numeral 1 denotes a full-face type cap body forming the outer shell of a helmet. The cap body 1 is formed of, for example, fiber reinforced resin (FRP), polycarbonate resin or unsaturated polyester resin. ing.

【００１１】前記帽体１の内側には顎を保護するガード
部２を除いて、プラスチック発泡体からなる緩衝材３が
装着されている。この緩衝材３は帽体１よりも格段に厚
く形成されており、その内面は、例えばポリウレタンフ
ォームを布地で包んだ内装材４で覆われている。Inside the cap body 1, a cushioning material 3 made of a plastic foam is attached except for a guard portion 2 for protecting the chin. The cushioning material 3 is formed to be much thicker than the cap body 1, and the inner surface thereof is covered with an interior material 4 in which polyurethane foam is wrapped with cloth.

【００１２】そして、この帽体１と緩衝材３との間に
は、本発明に係る布状部材５が介装されている。布状部
材５は、本実施例ではアラミド繊維を多数本束ねて紐を
形成し、その紐を柔軟性に富む網状に織ったものが使用
されており、帽体１の内周面に後述する手法によって結
合されている。A cloth-like member 5 according to the present invention is interposed between the cap body 1 and the cushioning member 3. In the present embodiment, the cloth-like member 5 is formed by bundling a large number of aramid fibers to form a cord and weaving the cord into a net having a high flexibility, which will be described later on the inner peripheral surface of the cap body 1. Are combined by method.

【００１３】なお、図１中符号６はシールド、７は帽体
１の開口縁部を取り巻くゴム製のシール材である。In FIG. 1, reference numeral 6 is a shield, and 7 is a rubber sealing material surrounding the opening edge of the cap body 1.

【００１４】このように構成されたヘルメットを組立て
るには、先ず、帽体１を所定形状に成形し、帽体１の内
周面に布状部材５を結合させる。この布状部材５を帽体
１に結合させるには、帽体１の内周面に布状部材５の複
数箇所をホットメルトによって溶着させたり、布状部材
５の所々を帽体１の内周面に接着剤，樹脂材等によって
接着したりして布状部材５を部分的に帽体１に固着させ
る。すなわち、布状部材５を帽体１に取付けた状態で
は、布状部材５における結合箇所以外の部分は帽体１に
対して自由に移動できることになる。To assemble the helmet thus constructed, first, the cap body 1 is formed into a predetermined shape, and the cloth-like member 5 is joined to the inner peripheral surface of the cap body 1. In order to connect the cloth-like member 5 to the cap body 1, a plurality of places of the cloth-like member 5 are welded to the inner peripheral surface of the cap body 1 by hot melt, or parts of the cloth-like member 5 are attached to the inside of the cap body 1. The cloth-like member 5 is partially fixed to the cap body 1 by adhering it to the peripheral surface with an adhesive, a resin material or the like. That is, when the cloth-like member 5 is attached to the cap body 1, the parts of the cloth-like member 5 other than the connecting portions can freely move with respect to the cap body 1.

【００１５】その後、帽体１内に緩衝材３を帽体１との
間に前記布状部材５を挟み込むようにして装着させ、内
装材４，シール材７およびシールド６を取付ける。この
ようにしてヘルメットが組立てられる。After that, the cushioning material 3 is mounted in the cap body 1 such that the cloth-like member 5 is sandwiched between the cushion body 3 and the cap body 1, and the interior material 4, the seal material 7 and the shield 6 are attached. In this way, the helmet is assembled.

【００１６】そして、組立後のヘルメットに先端の尖っ
た物体が衝突して帽体１がその物体によって貫通された
ときには、布状部材５は帽体１と緩衝材３とによって挟
まれたまま物体によって緩衝材３に圧接され、その状態
で物体によって引っ張られて撓むようになる。When an object with a sharp tip collides with the assembled helmet and the cap body 1 is penetrated by the object, the cloth-like member 5 is held between the cap body 1 and the cushioning material 3 and the object is kept. Thus, the cushioning material 3 is pressed against the cushioning material 3, and in this state, the cushioning material 3 is pulled by an object and bends.

【００１７】したがって、このヘルメットによれば、帽
体１を貫通した物体が進もうとする力は布状部材５の全
体に分散されるようになるから、その物体の進行が布状
部材５によって阻止されることになる。Therefore, according to this helmet, the force of the object penetrating the cap body 1 to move is distributed to the entire cloth-like member 5, so that the cloth-like member 5 advances the object. Will be blocked.

【００１８】本発明に係るヘルメットに対して日本工業
規格に基づく耐貫通性試験を行った結果は図２に示す通
りとなった。この試験に用いたヘルメットは、帽体１を
ＦＲＰによって形成して厚みを３mmとし、緩衝材３の厚
みを３５mmとした。そして、布状部材５を使用したもの
と使用していないものについて同様に試験を行った。ま
た、帽体１としては、強化繊維の種類の異なる２種類の
ものを用意し、それぞれについて同様に試験を行った。The results of a penetration resistance test based on Japanese Industrial Standards for the helmet according to the present invention are shown in FIG. In the helmet used in this test, the cap body 1 was formed by FRP to have a thickness of 3 mm, and the cushioning material 3 had a thickness of 35 mm. Then, the same test was performed for the one using the cloth-like member 5 and the one not using the same. Further, as the cap body 1, two types having different types of reinforcing fibers were prepared, and the same test was performed for each.

【００１９】図２は緩衝材３の発泡倍率を横軸とし、試
験用貫通物の先端が帽体１の外表面からヘルメット内に
貫入した沈下量を縦軸として前記各種ヘルメットの耐貫
通性を示し、同図中破線Ａと実線Ｂは本発明に係る布状
部材５が装着されていないヘルメットを使用した場合を
示す。なお、破線Ａで示されるヘルメットと実線Ｂで示
されるヘルメットとでは帽体１の強化繊維の種類が異な
る。また、一点鎖線ａは前記破線Ａで示したヘルメット
に本発明に係る布状部材５を装着させた場合を示し、二
点鎖線ｂは前記実線Ｂで示したヘルメットに本発明に係
る布状部材５を装着させた場合を示す。In FIG. 2, the foaming ratio of the cushioning material 3 is plotted on the horizontal axis, and the sinking amount of the tip of the test penetrating material from the outer surface of the cap body 1 into the helmet is plotted on the vertical axis to show the penetration resistance of the various helmets. The broken line A and the solid line B in the figure show the case where a helmet without the cloth-like member 5 according to the present invention is used. The helmet shown by the broken line A and the helmet shown by the solid line B have different types of reinforcing fibers in the cap body 1. Further, the alternate long and short dash line a indicates the case where the cloth-like member 5 according to the present invention is attached to the helmet shown by the broken line A, and the alternate long and two short dashes line b indicates the cloth-like member according to the present invention on the helmet shown by the solid line B. 5 shows the case where 5 is attached.

【００２０】同図に示すように、布状部材５を装着させ
るだけで貫通物の沈下量が減少することが分かる。As shown in the figure, it can be seen that the sinking amount of the penetrating object is reduced only by mounting the cloth-like member 5.

【００２１】なお、本実施例では布状部材５をアラミド
繊維によって形成した例を示したが、布状部材５の材質
としては、有機繊維のうち高密度ポリエチレン系合成繊
維やポリビニルアルコール系合成繊維等を使用すること
もできる。また、無機繊維としては、ガラス繊維や炭素
繊維等を使用することもできる。In this embodiment, the cloth-like member 5 is made of aramid fiber. However, the cloth-like member 5 is made of a high density polyethylene synthetic fiber or polyvinyl alcohol synthetic fiber among organic fibers. Etc. can also be used. Further, as the inorganic fiber, glass fiber, carbon fiber or the like can be used.

【００２２】さらに、布状部材５の構造も本実施例で示
したような網状に限定されるものではなく、布状部材５
は織布や例えばフェルト状の不織布によって形成するこ
ともでき、一方向性シートをクロス状に複数枚重ねて形
成することもできる。Further, the structure of the cloth-like member 5 is not limited to the net-like shape shown in this embodiment, and the cloth-like member 5 is not limited thereto.
Can be formed of a woven fabric or, for example, a felt-like nonwoven fabric, or can be formed by stacking a plurality of unidirectional sheets in a cross shape.

【００２３】さらにまた、本実施例では布状部材５を帽
体１に保持させた例について説明したが、布状部材５は
緩衝材３に保持させることもできる。そして、布状部材
５を帽体１や緩衝材３に結合させるに当たっては、布状
部材５を帽体１の内周面あるいは緩衝材３の内周面にあ
てがい、その状態で布状部材５に酢酸ビニル系樹脂から
なる液体を塗布し、乾燥させることによって行うことも
できる。このようにすると、柔軟性を有する酢酸ビニル
系樹脂を介して布状部材５が帽体１あるいは緩衝材３に
保持されるようになる。Furthermore, in the present embodiment, an example in which the cloth-like member 5 is held by the cap body 1 has been described, but the cloth-like member 5 can be held by the cushioning material 3. When connecting the cloth-like member 5 to the cap body 1 or the cushioning member 3, the cloth-like member 5 is applied to the inner peripheral surface of the cap body 1 or the cushioning member 3, and in that state, the cloth-like member 5 is applied. It is also possible to apply a liquid containing a vinyl acetate-based resin to and to dry it. By doing so, the cloth-like member 5 is held by the cap body 1 or the cushioning material 3 via the flexible vinyl acetate resin.

【００２４】加えて、帽体１の形状は本実施例で示した
ようなフルフェイス形に限らず、例えばジェット形や椀
形であってもよい。なお、本実施例では自動二輪車用ヘ
ルメットに本発明を適用した例を示したが、本発明は自
動車用ヘルメット，作業用安全帽等、人間の頭部を保護
するヘルメットであればどのようなヘルメットにも適用
できるということはいうまでもない。In addition, the shape of the cap body 1 is not limited to the full-face shape as shown in this embodiment, but may be, for example, a jet shape or a bowl shape. In addition, in the present embodiment, an example in which the present invention is applied to a motorcycle helmet is shown, but the present invention is any helmet as long as it is a helmet for protecting a human head, such as an automobile helmet and a work safety hat. It goes without saying that it can also be applied to.

【００２５】[0025]

【発明の効果】以上説明したように本発明に係るヘルメ
ットは、帽体と緩衝材との間に、柔軟性を有する布状部
材を介装したため、布状部材は貫通物が帽体を貫通した
ときに帽体と緩衝材とによって挟まれたまま貫通物によ
って緩衝材に圧接され、その状態で貫通物によって引っ
張られて撓むから、貫通物が進もうとする力は布状部材
の全体に分散される。As described above, in the helmet according to the present invention, since the cloth-like member having flexibility is interposed between the cap body and the cushioning material, the cloth-like member has the penetrating object penetrating the cap body. When it is held, it is pressed against the cushioning material by the penetrating object while being sandwiched between the cap body and the cushioning material, and in that state, it is pulled by the penetrating object and bends, so the force that the penetrating object tries to move is the entire cloth-like member. Dispersed in.

【００２６】したがって、貫通物の進行が布状部材によ
って阻止されるから、貫通物が緩衝材を貫通し難くな
る。このため、帽体の肉厚を薄く形成しても耐貫通性を
確保できるので、ヘルメットの軽量化を図ることができ
る。Therefore, since the penetration of the penetrating object is blocked by the cloth-like member, it becomes difficult for the penetrating object to penetrate the cushioning material. Therefore, the penetration resistance can be ensured even if the thickness of the cap body is thin, so that the weight of the helmet can be reduced.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明に係るヘルメットの断面図である。1 is a cross-sectional view of a helmet according to the present invention.

【図２】本発明に係るヘルメットに耐貫通性試験を行っ
た結果を示すグラフである。FIG. 2 is a graph showing the results of a penetration resistance test performed on the helmet according to the present invention.

【符号の説明】[Explanation of symbols]

１ 帽体 ３ 緩衝材 ５ 布状部材 1 Hat body 3 Buffer material 5 Cloth-like member

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 樹脂材製帽体内にプラスチック発泡体か
らなる緩衝材が装着されたヘルメットにおいて、前記帽
体と緩衝材との間に、柔軟性を有する布状部材を介装し
たことを特徴とするヘルメット。1. A helmet in which a cushioning material made of plastic foam is mounted in a resin cap body, wherein a flexible cloth-like member is interposed between the cap body and the cushioning material. And a helmet.