iron man

Japanese: iron man(英語表記)ironman
iron man

...Various types are currently in use, including drum cutters, hovers, and continuous miners.
[Development History]
The world's first successful coal mining machine, used in a British coal mine in 1861, was called the Iron Man, and it imitated the action of a human swinging a pickaxe horizontally to create a horizontal groove at the bottom of the coal seam (undercutting). Inspired by the success of the Iron Man, by the end of the 19th century, a series of machines were invented, including the chain cutter (also called a jib cutter or coal cutter), which was used for many years afterwards, the disc cutter, which had blades attached to a circular plate that rotates in a horizontal plane, and the bar cutter, which had many blades attached to a round bar with a horizontal shaft. All of these were used for undercutting coal seams.

*Some of the terminology that mentions "iron man" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ドラムカッター,ホーベル,コンティニュアスマイナーなど,いろいろな種類のものが現在使用されている。
[発達の歴史]
 1861年にイギリスの炭鉱で使用されて,世界で初めて成功した採炭機は,アイアンマンiron manと呼ばれ,人間がつるはしを水平に振るう動作をまねて,炭層の下部に水平な溝を作る作業(下透し作業)を行うものであった。このアイアンマンの成功に刺激されて,19世紀末までには,その後長く使用されることになったチェーンカッターchain cutter(ジブカッターjib cutter,コールカッターcoal cutterとも呼ばれる)や,水平面内を回転する円板に刃物をとりつけたディスクカッターdisc cutter,水平軸を有する丸棒に多数の刃物をとりつけたバーカッターbar cutterなどがつぎつぎに発明され,いずれも炭層の下透し作業に用いられた。…

※「iron man」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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