JPS54108443A - Device for automatically opening and closing airtight door - Google Patents
Device for automatically opening and closing airtight doorInfo
- Publication number
- JPS54108443A JPS54108443A JP1570678A JP1570678A JPS54108443A JP S54108443 A JPS54108443 A JP S54108443A JP 1570678 A JP1570678 A JP 1570678A JP 1570678 A JP1570678 A JP 1570678A JP S54108443 A JPS54108443 A JP S54108443A
- Authority
- JP
- Japan
- Prior art keywords
- door
- valve
- oil
- piston
- supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Support Devices For Sliding Doors (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
PURPOSE: To simplify the adjusting operation of an airtight door by hydraulically opening or closing and sealing the door via a hydraulic circuit to thereby exactly airtightly seal the door against external pressure.
CONSTITUTION: When a pump 6 is normally rotated to supply hydraulic oil to a pipe 12', a check valve 11 is opened to communicate the pilot unit 9a of a pilot control valve 9 with a tank to thereby switch the valve 9 and to open a ckeck valve 10 so as to move a piston 1c rightwardly to thus open a door. When the pump 6 is reversely rotated to supply the oil to a pipe 12, it moves the piston 1c leftwardly to thus close the door. A passage 15 communicates with a chamber 1b immediately before the piston 1c completes its closing stroke to thereby supply the oil to a door pushing cylinder 2 to cause its piston rod 2a to push the door into sealed state. When the door is thus sealed airthghtly, the cylinder 2 is shut off via a check valve 17 and second chock valve 11. Thus, even if large external pressure is applied to the door, the latter is still sealed due to non-compressibility of the oil.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1570678A JPS54108443A (en) | 1978-02-13 | 1978-02-13 | Device for automatically opening and closing airtight door |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1570678A JPS54108443A (en) | 1978-02-13 | 1978-02-13 | Device for automatically opening and closing airtight door |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54108443A true JPS54108443A (en) | 1979-08-25 |
JPS5734428B2 JPS5734428B2 (en) | 1982-07-22 |
Family
ID=11896201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1570678A Granted JPS54108443A (en) | 1978-02-13 | 1978-02-13 | Device for automatically opening and closing airtight door |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54108443A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5974287U (en) * | 1982-11-11 | 1984-05-19 | 株式会社中村鐵工所 | Door device for high pressure treatment tanks, etc. |
JPH06321307A (en) * | 1993-05-14 | 1994-11-22 | Fuji Plant Kk | Improvement of gas cooled storage automated warehouse |
KR20020051734A (en) * | 2000-12-23 | 2002-06-29 | 이계안 | The direct operational type open/close device for a sliding door of bus |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6183721U (en) * | 1984-11-08 | 1986-06-03 |
-
1978
- 1978-02-13 JP JP1570678A patent/JPS54108443A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5974287U (en) * | 1982-11-11 | 1984-05-19 | 株式会社中村鐵工所 | Door device for high pressure treatment tanks, etc. |
JPH06321307A (en) * | 1993-05-14 | 1994-11-22 | Fuji Plant Kk | Improvement of gas cooled storage automated warehouse |
KR20020051734A (en) * | 2000-12-23 | 2002-06-29 | 이계안 | The direct operational type open/close device for a sliding door of bus |
Also Published As
Publication number | Publication date |
---|---|
JPS5734428B2 (en) | 1982-07-22 |
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