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A platform for research: civil engineering, architecture and urbanism
ABOVEGROUND OPENING PART STRUCTURE OF UNDERGROUND SPACE STRUCTURE
PROBLEM TO BE SOLVED: To enable an escape by allowing an operator shut up in an underground space structure (for example, a manhole) to open a cover of an aboveground opening part by oneself.SOLUTION: Means B for releasing biting-in of a cover 3 to a receiving frame 4 is provided on the reverse surface side of the cover 3. The biting-in releasing means B releases the biting-in of the cover 3 to the receiving frame 4 by slightly lifting a part of the cover 3 to the receiving frame 4 by manually operating from the inside of an underground space, and comprises a camshaft 30 provided on a reverse surface of the cover 3, a rotatable eccentric cam 31 journaled by this and a lever B arranged on the reverse surface side of the cover 3 for rotating this, as one example, and a distance between the camshaft 30 and a hook receiver 6 is expanded by rotating the eccentric cam 31 by the lever B, and the biting-in of the cover 3 to the receiving frame 4 is released.
【課題】地下空間構造物（例えば、マンホール）に閉じ込められた作業員が地上開口部の蓋を自力で開け、脱出できるようにする。【解決手段】蓋３の裏面側に受枠４に対する蓋３の食い込みを解除する手段Ｂを設ける。食い込み解除手段Ｂは、地下空間の内部から手動で操作して受枠４に対して蓋３の一部をわずかに持ち上げることで、受枠４に対する蓋３の食い込みを解除するものである。一例として、蓋３の裏面に設けたカム軸３０と、これに軸支されて回転が可能な偏心カム３１と、これを回転させる蓋３の裏面側に配置するレバーＢを備え、レバーＢにより偏心カム３１を回転してカム軸３０とフック受け６との距離を拡大して、受枠４に対する蓋３の食い込みを解除する。【選択図】図９
ABOVEGROUND OPENING PART STRUCTURE OF UNDERGROUND SPACE STRUCTURE
PROBLEM TO BE SOLVED: To enable an escape by allowing an operator shut up in an underground space structure (for example, a manhole) to open a cover of an aboveground opening part by oneself.SOLUTION: Means B for releasing biting-in of a cover 3 to a receiving frame 4 is provided on the reverse surface side of the cover 3. The biting-in releasing means B releases the biting-in of the cover 3 to the receiving frame 4 by slightly lifting a part of the cover 3 to the receiving frame 4 by manually operating from the inside of an underground space, and comprises a camshaft 30 provided on a reverse surface of the cover 3, a rotatable eccentric cam 31 journaled by this and a lever B arranged on the reverse surface side of the cover 3 for rotating this, as one example, and a distance between the camshaft 30 and a hook receiver 6 is expanded by rotating the eccentric cam 31 by the lever B, and the biting-in of the cover 3 to the receiving frame 4 is released.
【課題】地下空間構造物（例えば、マンホール）に閉じ込められた作業員が地上開口部の蓋を自力で開け、脱出できるようにする。【解決手段】蓋３の裏面側に受枠４に対する蓋３の食い込みを解除する手段Ｂを設ける。食い込み解除手段Ｂは、地下空間の内部から手動で操作して受枠４に対して蓋３の一部をわずかに持ち上げることで、受枠４に対する蓋３の食い込みを解除するものである。一例として、蓋３の裏面に設けたカム軸３０と、これに軸支されて回転が可能な偏心カム３１と、これを回転させる蓋３の裏面側に配置するレバーＢを備え、レバーＢにより偏心カム３１を回転してカム軸３０とフック受け６との距離を拡大して、受枠４に対する蓋３の食い込みを解除する。【選択図】図９
ABOVEGROUND OPENING PART STRUCTURE OF UNDERGROUND SPACE STRUCTURE
地下空間構造物の地上開口部構造
KANDA SATOKI (author)
2015-12-17
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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