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Document Type and Number:
Japanese Patent JP2020073812
Kind Code:
To enable vibration to be reduced even if vibration occurs when earthquake or the like occurs.SOLUTION: An air valve comprises a lower flange part 19 arranged at a lower part of a valve casing 5 and an intermediation flange part 20 fixed to the lower part flange part 19 through a small clearance. An expanded diameter cylinder 20b of the intermediation flange part 20 is fitted to an expanded diameter opening 19a of the lower part flange part 19, a recess-shaped receiving part 19b is formed at the expanded diameter opening 19a and a ring-like vibration control rubber 24 is installed between it and the expanded diameter cylinder 20b. The lower part flange part 19 and an outer peripheral part of the intermediation flange part 20 are fixed by a bolt 21 and a nut 22 while being spaced by a prescribed value, a spherical washer 23 and a disc spring 26 are provided between the recess-shaped spring receiver 19c and the intermediation flange part 20, and a through-bolt 21 is fitted and inserted into the spherical washer 23 and the disc spring 26 and they are coaxially arranged.SELECTED DRAWING: Figure 4

Application Number:
Publication Date:
May 14, 2020
Filing Date:
September 18, 2019
Export Citation:
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International Classes:
F16K27/00; F16K24/00
Attorney, Agent or Firm:
Nishizawa Kazumi
Kenichi Kawabuchi
Shiro Suzuki

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