Dynamic belay

Japanese: dynamic belay(英語表記)dynamicbelay
Dynamic belay

…Particularly, it is important to be aware that when the leader falls, the impact energy is extremely strong, and it is easy for the leader to fail to belay, leading to tragic results. To prevent this, it is necessary to use a dynamic belay, which gradually applies the brakes while letting the rope flow out at the moment of the fall, and converts the force energy into heat energy through friction and absorbs it. For this reason, the belay person usually uses gloves for braking, but there are also many cases where various braking devices are used to make the belay easier and more reliable. …

*Some of the terminology that refers to "dynamic belay" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…とくに注意すべき点は,トップ(先頭者)が墜落したときは衝撃エネルギーがきわめて強く,確保に失敗して悲惨な結果を招きやすいことである。これを防ぐためには,墜落の瞬間にザイルを流し出しながら徐々に制動を加え,摩擦によって力のエネルギーを熱エネルギーに転換し吸収する制動確保(ダイナミックビレーdynamic belay)を行うことが必要である。そのために,確保者は制動用の手袋を使うのが普通であるが,この確保をより容易で確実にする目的で各種の制動器具を使う例も多い。…

※「dynamic belay」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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