Title:
OPENING CLOSING DEVICE AND MAINTENANCE METHOD FOR THE SAME
Document Type and Number:
Japanese Patent JP2014080751
Kind Code:
A
Abstract:
To provide a closing device that can easily and reliably open/close an opening of a variety of facilities such as a plant, without bringing an operator closer to the opening, and an inspection method and a maintenance method for the same.
Gas flows into a bag body 4 with an air chamber 7 for being filled with the gas, and the bag body 4 is positioned in an opening by bag body maintaining means 6 to close the opening. Changes in air temperature, atmospheric pressure and internal pressure of the bag body 4 are measured so that the presence or absence of the leakage of the gas from the bag body 4 can be checked. The gas is continuously supplied into the air chamber 7 and pressurized to maintain a closed state of the opening.
Inventors:
OHORI MICHIO
ITO TAKANOBU
FUKUBA KAZUSHI
ITO TAKANOBU
FUKUBA KAZUSHI
Application Number:
JP2012227916A
Publication Date:
May 08, 2014
Filing Date:
October 15, 2012
Export Citation:
Assignee:
SHIN NIPPON AIR TECH CO LTD
International Classes:
E04H5/02; G21C9/00; G21C13/028
Domestic Patent References:
| JPH07269173A | 1995-10-17 | |||
| JPS63138079A | 1988-06-10 | |||
| JP2004225276A | 2004-08-12 | |||
| JP2006193969A | 2006-07-27 |
Attorney, Agent or Firm:
Nobuyuki Iida
Kazuhiko Iida
Kazuhiko Iida