Closing mechanism

Japanese Patent JP6277156

B2

An opening/closing device according to the present invention includes a gate, a fall prevention unit, a support release unit, a first float, a floating prevention unit, a second float, and a floating prevention release unit. The gate receives a flow of fluid, and is able to fall down toward a downstream direction of the flow. The fall prevention unit supports the gate, thereby preventing the gate from falling down. The support release unit releases the support for the gate by the fall prevention unit. The first float is arranged on an upstream side of the gate, is arranged on one of the left side and the right side of the gate viewed from upstream, and is less in the specific gravity than the fluid. The floating prevention unit prevents the first float from floating. The second float is arranged on the upstream side of the gate, is arranged on the other one of the left side and the right side of the gate viewed from upstream, and is less in the specific gravity than the fluid. The floating prevention release unit releases the prevention of the first float from the floating by the floating prevention unit as the second float floats The support release unit is activated as the first float floats.

Motonobu Ito
Kikuchi Yu
Takato Aoyama
Takaaki Odate
Kenji Hasegawa
Igawa

JP2015114450A

February 07, 2018

June 05, 2015

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Nippon Koei Co., Ltd.
Tokyo Metropolitan Sewerage Service Co., Ltd.
Kansei Industry Co., Ltd.

E03F7/02; E02B7/40; E02B8/02; E03F9/00

JP2010180566A
JP2010180567A
JP2010180568A
JP2008106461A
JP2004360280A

是安秀樹、外2名,下水道管路の自動洗浄装置(フラッシュゲート)の作動性と効果に関する中間報告, 下水道研究発表会講演集,2011年 7月 8日,vol.48,p.578-580

Masumi Hosoda
So Ishii

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