HIDDEN DOOR LOCK AND HIDDEN DOOR

To provide a hidden door lock that also has a safety function to prevent improper unlocking.SOLUTION: Included are: a lock rod horizontally retractable from a lock rod hole formed on the door tip side end face of a lock member; and a push member which is attached to the inside of a door frame and has a plate-like extension part which is released in a shortened state when a door plate in a closed state is pushed in and extends a fixed length in the door opening direction. In addition, included is: a receiving hole formed at a face on the side of the door plate of the extension part and constitutes a locked state when the lock rod is inserted under a door closed state. The extension part is formed in a lock rod protection part covering the lock rod hole, and the outside surface of the door plate in the closed state is formed on substantially the same surface as the outside surface of the door frame. Provided are a highly safe hidden door lock and a hidden door, in which the door plate is pushed out in the outdoor direction together with the lock rod in the locked state by the extension operation of the extrusion member to be in a half-opened state, but contact with the lock rod from the outside becomes difficult through a gap between the door frame and the door plate in the half-opened state by a lock rod protection part, and the door is prevented from moving in the pushing direction even when the lock rod is directly pushed by an auxiliary rod.SELECTED DRAWING: Figure 4 【課題】 不当な解錠操作をされにくくするための安全機能も具備する隠蔽扉錠が求められていた。【解決手段】 錠部材の戸先側端面に形成された錠杆孔から水平に出没可能な錠杆と、戸枠の内側に取り付けられてなると共に、閉扉状態の前記戸板を押し込むと短縮状態が解放されて開扉方向に一定長さ伸長動作する板状の伸長部を備えてなる押出し部材を有する。また、前記伸長部の戸板側の面に設けられ、閉扉状態における前記錠杆の嵌入により施錠状態を構成する受孔と、を有し、前記伸長部は前記錠杆孔を被覆する錠杆保護部に形成され、閉扉状態の前記戸板の外側面は、前記戸枠の外側面と略同一面に形成される。前記戸板が前記押出し部材の伸長動作により、施錠状態の前記錠杆と共に戸外方向に押し出されて半開状態となるが、錠杆保護部によって半開状態の戸板と戸枠との隙間を介して外部から錠杆への接触が困難となること、また、補助杆により錠杆を直接押しても押し込み方向に動かなくすることで安全性の高い隠蔽扉錠、及び隠蔽扉を提供する。【選択図】 図４