A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
MANHOLE COVER
To provide a manhole cover with a ventilation function in a water storage tank which reduces maintenance and management cost and replacement component cost.SOLUTION: A manhole cover disposed in an entrance 2 in an upper wall 1a of a water storage tank comprises: a first cylindrical body 12 erected from the upper wall 1a; a cover body 13 opening and closing an upper end opening of the first cylindrical body 12; and a second cylindrical body 15 securing a first gap between it and an outer peripheral surface of the first cylindrical body 12. A vent hole 40 is formed in the first cylindrical body 12, and the inside of the water storage tank is communicated with the outside via the vent hole 40, the first gap, and a second gap S2 secured below the second cylindrical body 15. The manhole cover includes a net plate 41 as a separate body from the first cylindrical body 12, and the net plate 41 is detachably held in a position covering the vent hole 40 by holding means such as a guide portion.SELECTED DRAWING: Figure 4
【課題】維持管理コストの低減及び交換部品コストの低減を図った、貯水槽の換気機能を有する人孔蓋を提供する。【解決手段】貯水槽の上壁１ａの出入口２に配置される人孔蓋であって、上壁１ａから立ち上がる第１の筒状体１２と、第１の筒状体１２の上端開口を開閉する蓋本体１３と、第１の筒状体１２の外周面との間に第１の隙間を確保する第２の筒状体１５とを備え、第１の筒状体１２に通気口４０を形成し、貯水槽内を、通気口４０、第１の隙間及び第２の筒状体１５の下方に確保された第２の隙間Ｓ２を介して外部に連通している人孔蓋において、第１の筒状体１２とは別体の網板４１を備え、網板４１を、ガイド部等の保持手段により、通気口４０を覆う位置に着脱可能に保持する。【選択図】図４
MANHOLE COVER
To provide a manhole cover with a ventilation function in a water storage tank which reduces maintenance and management cost and replacement component cost.SOLUTION: A manhole cover disposed in an entrance 2 in an upper wall 1a of a water storage tank comprises: a first cylindrical body 12 erected from the upper wall 1a; a cover body 13 opening and closing an upper end opening of the first cylindrical body 12; and a second cylindrical body 15 securing a first gap between it and an outer peripheral surface of the first cylindrical body 12. A vent hole 40 is formed in the first cylindrical body 12, and the inside of the water storage tank is communicated with the outside via the vent hole 40, the first gap, and a second gap S2 secured below the second cylindrical body 15. The manhole cover includes a net plate 41 as a separate body from the first cylindrical body 12, and the net plate 41 is detachably held in a position covering the vent hole 40 by holding means such as a guide portion.SELECTED DRAWING: Figure 4
【課題】維持管理コストの低減及び交換部品コストの低減を図った、貯水槽の換気機能を有する人孔蓋を提供する。【解決手段】貯水槽の上壁１ａの出入口２に配置される人孔蓋であって、上壁１ａから立ち上がる第１の筒状体１２と、第１の筒状体１２の上端開口を開閉する蓋本体１３と、第１の筒状体１２の外周面との間に第１の隙間を確保する第２の筒状体１５とを備え、第１の筒状体１２に通気口４０を形成し、貯水槽内を、通気口４０、第１の隙間及び第２の筒状体１５の下方に確保された第２の隙間Ｓ２を介して外部に連通している人孔蓋において、第１の筒状体１２とは別体の網板４１を備え、網板４１を、ガイド部等の保持手段により、通気口４０を覆う位置に着脱可能に保持する。【選択図】図４
MANHOLE COVER
人孔蓋
MAEDA HIDEHIKO (author) / MAEDA NOBUTAKA (author) / MAEDA YASUHIDE (author)
2019-02-21
Patent
Electronic Resource
Japanese
IPC:
E02D
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