JPS5295855A - Safety device for opening and closing large hinged doors - Google Patents

Safety device for opening and closing large hinged doors

Info

Publication number
JPS5295855A
JPS5295855A JP1187776A JP1187776A JPS5295855A JP S5295855 A JPS5295855 A JP S5295855A JP 1187776 A JP1187776 A JP 1187776A JP 1187776 A JP1187776 A JP 1187776A JP S5295855 A JPS5295855 A JP S5295855A
Authority
JP
Japan
Prior art keywords
doors
opening
safety device
hinged doors
closing large
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.)
Pending
Application number
JP1187776A
Other languages
Japanese (ja)
Inventor
Kotaro Kito
Hironobu Aoyama
Toshiaki Abe
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>
Nihon Kentetsu Co Ltd
Japan National Railways
Original Assignee
JAPANESE NATIONAL RAILWAYS<JNR>
Nihon Kentetsu Co Ltd
Japan National Railways
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>, Nihon Kentetsu Co Ltd, Japan National Railways filed Critical JAPANESE NATIONAL RAILWAYS<JNR>
Priority to JP1187776A priority Critical patent/JPS5295855A/en
Publication of JPS5295855A publication Critical patent/JPS5295855A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To increase the safety of hinged doors wherein the circuit for operating a screw type cylinder is not actuated unless metallic locks for the doors are released, which doors thereby permits preventing a motor from being burnt and which doors can be thereby prevented from being broken.
COPYRIGHT: (C)1977,JPO&Japio
JP1187776A 1976-02-06 1976-02-06 Safety device for opening and closing large hinged doors Pending JPS5295855A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1187776A JPS5295855A (en) 1976-02-06 1976-02-06 Safety device for opening and closing large hinged doors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1187776A JPS5295855A (en) 1976-02-06 1976-02-06 Safety device for opening and closing large hinged doors

Publications (1)

Publication Number Publication Date
JPS5295855A true JPS5295855A (en) 1977-08-11

Family

ID=11789947

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1187776A Pending JPS5295855A (en) 1976-02-06 1976-02-06 Safety device for opening and closing large hinged doors

Country Status (1)

Country Link
JP (1) JPS5295855A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4844230B1 (en) * 1969-12-16 1973-12-24

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4844230B1 (en) * 1969-12-16 1973-12-24

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