JPS54108444A - Device for automatically opening and closing airtight door - Google Patents

Device for automatically opening and closing airtight door

Info

Publication number
JPS54108444A
JPS54108444A JP1570778A JP1570778A JPS54108444A JP S54108444 A JPS54108444 A JP S54108444A JP 1570778 A JP1570778 A JP 1570778A JP 1570778 A JP1570778 A JP 1570778A JP S54108444 A JPS54108444 A JP S54108444A
Authority
JP
Japan
Prior art keywords
door
piston
pipe
open
valve
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
Application number
JP1570778A
Other languages
Japanese (ja)
Other versions
JPS578270B2 (en
Inventor
Kazuma Sunakawa
Hiroo Kakinuma
Koji Masuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JAPANESE NATIONAL RAILWAYS<JNR>
Nippon Sharyo Ltd
Japan National Railways
Nabco Ltd
Original Assignee
JAPANESE NATIONAL RAILWAYS<JNR>
Nippon Sharyo Ltd
Japan National Railways
Nabco Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JAPANESE NATIONAL RAILWAYS<JNR>, Nippon Sharyo Ltd, Japan National Railways, Nabco Ltd filed Critical JAPANESE NATIONAL RAILWAYS<JNR>
Priority to JP1570778A priority Critical patent/JPS54108444A/en
Publication of JPS54108444A publication Critical patent/JPS54108444A/en
Publication of JPS578270B2 publication Critical patent/JPS578270B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Specific Sealing Or Ventilating Devices For Doors And Windows (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 20, a pilot control valve 14 is switched to communicate a pilot passage 15b with a tank to thereby open a pilot check valve 15. Thus, a piston 2 is returned to release the sealed state of the door. Since a pipe 9c also communicates with the tank, a control valve 9 is switched to open a check valve 11 to thereby move a piston 1c rightwardly to thus open a door. When the pump 6 is reversely rotated to supply the oil to a pipe 21, to thereby open a ckeck valve 10 and to move the piston 1c leftwardly to thus close the door. A pipe 22 communicates with the pump 6 immediately before the piston 1c completes its final stroke to switch the valve 14 to thereby supply the oil to a door pushing cylinder 2. When the door is thus sealed airthghtly, the cylinder 2 is shut off via a check valve 15 to be retained in sealed state.
COPYRIGHT: (C)1979,JPO&Japio
JP1570778A 1978-02-13 1978-02-13 Device for automatically opening and closing airtight door Granted JPS54108444A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1570778A JPS54108444A (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
JP1570778A JPS54108444A (en) 1978-02-13 1978-02-13 Device for automatically opening and closing airtight door

Publications (2)

Publication Number Publication Date
JPS54108444A true JPS54108444A (en) 1979-08-25
JPS578270B2 JPS578270B2 (en) 1982-02-16

Family

ID=11896230

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1570778A Granted JPS54108444A (en) 1978-02-13 1978-02-13 Device for automatically opening and closing airtight door

Country Status (1)

Country Link
JP (1) JPS54108444A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005132353A (en) * 2003-10-06 2005-05-26 Central Japan Railway Co Vehicle door device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005132353A (en) * 2003-10-06 2005-05-26 Central Japan Railway Co Vehicle door device

Also Published As

Publication number Publication date
JPS578270B2 (en) 1982-02-16

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