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Patent Searching and Data


Title:
OPENING AND CLOSING CONTROL SYSTEM FOR MANHOLE COVER
Document Type and Number:
Japanese Patent JP2001003616
Kind Code:
A
Abstract:

To provide an opening and closing control system for a manhole cover for providing detachable on a keyhole provided on a cover main body of a manhole cover, capable of executing the corrective management of the locking or unlocking state of the manhole cover by directing the unlocking permission of a key cover which can be refused the access to a keyhole from the outside though a central controller, capable of locking sure and strict the manhole cover by easy constitution, and capable of unlocking easy it by only permitted person or group.

A personal certification code of a personal identification tag is recognized by a reader communication terminal, and a laying location code of a manhole cover memorized in a ROM of a control chip is read out by the reader communication terminal. The personal certification code and the laying location code are transmitted to a centralized control center, and an encrypted unlocking permission signal is received from the centralized control center. A key cover is unlocked when a solution operated in the control chip is corresponded to the unlocking permission signal.


Inventors:
SAKANE TETSUSHI
FUJII TAKASHI
HIYOUDOU NAKAMARO
NAMIOKA HIRONORI
Application Number:
JP1999000179499
Publication Date:
January 09, 2001
Filing Date:
June 25, 1999
Export Citation:
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Assignee:
HANEDA HUME PIPE CO LTD
International Classes:
E02D29/14; E05B49/00; E05B65/00; (IPC1-7): E05B49/00; E02D29/14; E05B65/00
Attorney, Agent or Firm:
中川 周吉 (外1名)