SAFETY DEVICE OF ELEVATOR DOOR - MITSUBISHI ELECTRIC CORP

Title:

SAFETY DEVICE OF ELEVATOR DOOR

Document Type and Number:

Japanese Patent JPS53145249

Kind Code:

A

Abstract:

PURPOSE: To ensure safety, by driving a ultrasonic wave transmitting and receiving instrument mounted towards a floor near a ceiling of te cage side at a fixed time interval, and by detecting the presence of absence of reflection wave, to stop the closing operation of doors when there exists no reflection wave.

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Inventors:

FURUYA YOSHIAKI
NAGAI SATOSHI
HONDA YOSHIYUKI

Application Number:

JP5966277A

Publication Date:

December 18, 1978

Filing Date:

May 23, 1977

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP

International Classes:

B66B13/26; B66B5/02; (IPC1-7): B66B5/02; B66B13/26

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