A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Provided is a locking apparatus for a manhole iron cover that can promptly release the pressure in a sewerage pipe, can suppress the lifting height of the cover, and can make the posture of the lifted cover stable, when the cover is lifted due to a pressure rise in the pipe.The locking apparatus for the manhole iron cover includes: a lock main body that is attached to a peripheral lower surface of the cover and includes at least one hook; a recessed part that is formed on an upper surface of the cover and includes an engagement part that engages with a claw for opening the cover; and a hook receiver that is formed in a peripheral wall lower part of a receiving frame and engages with the hook. The lock main body includes: a pivotal support part having an axis that is parallel to a lower surface of the cover; and a pressing part on a peripheral side of the cover with respect to the pivotal support part. A claw abutment surface that abuts against the claw is formed on an upper surface of the pressing part. An inclined part is formed on the lower surface of the cover, the lower surface being opposed to the claw abutment surface. When the hook and the hook receiver engage with each other, the claw abutment surface and an upper surface of the receiving frame are located at substantially the same height. The lock main body itself is attached rotatably about the pivotal support part.
Provided is a locking apparatus for a manhole iron cover that can promptly release the pressure in a sewerage pipe, can suppress the lifting height of the cover, and can make the posture of the lifted cover stable, when the cover is lifted due to a pressure rise in the pipe.The locking apparatus for the manhole iron cover includes: a lock main body that is attached to a peripheral lower surface of the cover and includes at least one hook; a recessed part that is formed on an upper surface of the cover and includes an engagement part that engages with a claw for opening the cover; and a hook receiver that is formed in a peripheral wall lower part of a receiving frame and engages with the hook. The lock main body includes: a pivotal support part having an axis that is parallel to a lower surface of the cover; and a pressing part on a peripheral side of the cover with respect to the pivotal support part. A claw abutment surface that abuts against the claw is formed on an upper surface of the pressing part. An inclined part is formed on the lower surface of the cover, the lower surface being opposed to the claw abutment surface. When the hook and the hook receiver engage with each other, the claw abutment surface and an upper surface of the receiving frame are located at substantially the same height. The lock main body itself is attached rotatably about the pivotal support part.
LOCKING DEVICE FOR MANHOLE IRON COVER
VERRIEGELUNGSVORRICHTUNG FÜR SCHACHTEISENABDECKUNG
DISPOSITIF DE VERROUILLAGE POUR COUVERCLE EN FER DE TROU D'HOMME
HATA NOBUYUKI (author)
2024-07-17
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
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Gründungen