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乾徳山 恵林寺 うぐいす廊下 Nightingale floor, Erinji-Temple
Japan

恵林寺の本堂と明王殿を結ぶ「うぐいす廊下」、侵入者を察知するため、歩くと「キュッ・キュッ」と

うぐいすの鳴き声に似た音がする仕掛けとなっています。


日本の古来の建築物に見られる、人が床の板の上を歩く事により
きしみ音が鳴る様につくられた仕組みを鶯張りと言い、
外部侵入者の危険探知の為に設けられたとされている。

 鶯張りの成立の経緯は人為的、自然作為と諸説はあるが、
その技術は失われ今日では同等の床の製作は難しいと言われている。

重量がかかればどの様に歩いても鳴るように作ってある為に
日常の用途としては制限が多く、その為に部外者でない者と
聞いて判るように、廊下を通過する際はある一定のリズムを守る事が
定められていた場合もあった。

床板と根太とを取り付けるとき、板の上から根太に向かって釘を打てば、
床面に釘の頭が見えてしまう。
入念な建築においては床面に釘の頭を見せないよう、
床板下面に設けた窪みに目かすがいの一端を打ち込み、
他端を根太に釘で留める、という方法をとる。
鶯張りの場合は、床板の幅が広いために両側が多少上方に反り、
目かすがいの釘穴はその反りを吸収できるよう、
あらかじめ上下に余裕を持たせてある。床板の上から荷重がかかると一時的に反りが戻り、
目かすがいの釘穴が釘と擦れあって音を発するのである。

◯ ~wiki鶯張り

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Copyright: Kudo Kenji
Type: Spherical
Resolution: 8000x4000
Taken: 08/04/2016
Uploaded: 01/05/2016
Updated: 04/05/2016
Views:

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Tags: erinji; temple; kentokusan; takeda_shingen; nightingale_floor
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