sledge hammersとは 意味・読み方・使い方

In the ninth section of Kanatehon, Chushingura (a program of Kabuki - Japanese classical drama titled "The treasury of Loyal Retainers"), there is a description that says; 'KO no Moronao, known as a prudent person, all shoji and fusuma of the residence had shirizashi (a kind of key for fitting, a wedge knocked in under rail) and amado (shutters) had aisen-aikuro (locked with the meeting edges made with a tongue and groove or with a lap joint), of which locks couldn't be broken open, and tearing them down with sledge hammers would make a sound and there wouldn't be time to say; how was it...'発音を聞く 例文帳に追加

歌舞伎の仮名手本忠臣蔵の九段目に、「用心厳しき高師直、障子・襖は皆尻ざし（建具の一種の錠で、框の下に楔を打ち込んだもの）、雨戸に合栓合框（錠の一種）、こじて外れず、大槌にて毀（こわ）たば音して用意せんか、それいかが・・・」とある。 - Wikipedia日英京都関連文書対訳コーパス