A personal lighting device consisting of a head piece (lamp) attached to the front of a safety helmet, a battery attached to a belt around the waist or hung from a backpack, and the two connected by a cabtyre cable (a rubber-insulated electric wire). It is also called a portable safety light. There are lead-acid battery and alkaline battery types, and the illumination on a vertical surface two meters away is 50 lux or more. It first came into use in coal mines where there was a risk of gas and coal dust explosions, but is now widely used in general mines and tunnel construction. [Nobuo Fusamura] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
ヘッドピースhead pieace(灯具)を保安帽の前部に取り付け、蓄電池をベルトで腰に巻き付けるか背負い袋で吊(つ)るすかして、両者をキャブタイヤケーブルcabtyre cable(ゴム絶縁を施した電線)で接続した個人用照明器具。携帯型安全電灯ともいう。鉛蓄電池式とアルカリ蓄電池式があり、2メートル離れた垂直面の照度は50ルクス以上ある。ガス、炭塵(たんじん)爆発のおそれのある炭鉱で使用され始めたが、現在は一般の鉱山やトンネル工事などでも広く使われている。 [房村信雄] 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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