Title:
PRODUCTION FACILITY CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2001/020410
Kind Code:
A1
Abstract:
A production facility control system having a mechanical movable part, the safety of which is easily evaluated. A safety-related circuit part (1) and a safety-unrelated circuit part (2) are separated from each other in a circuit way. The safety-related circuit part (1) has a function related to avoidance of collision between a mechanical movable part (4) and a human being and a characteristic of generating a high level of energy only when the safety-related circuit part (1) operates normally and a low level of energy when it is out of order. The safety-unrelated circuit part (2) has a function of controlling the operation of the mechanical movable part (4) and is so linked to the safety-related circuit part (1) that it can control the operation of the mechanical movable part (4) only when the safety-related circuit part (1) is generating a high level of energy.
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Inventors:
SAKAI MASAYOSHI (JP)
FUTSUHARA KOICHI (JP)
FUTSUHARA KOICHI (JP)
Application Number:
PCT/JP2000/006362
Publication Date:
March 22, 2001
Filing Date:
September 18, 2000
Export Citation:
Assignee:
NIPPON SIGNAL CO LTD (JP)
SAKAI MASAYOSHI (JP)
FUTSUHARA KOICHI (JP)
SAKAI MASAYOSHI (JP)
FUTSUHARA KOICHI (JP)
International Classes:
B23Q41/08; B25J9/16; G05B9/02; G05B19/18; G05B19/418; (IPC1-7): G05B9/02; B25J19/06
Foreign References:
| JPH09272096A | 1997-10-21 | |||
| JPH06226683A | 1994-08-16 | |||
| JPH0557669A | 1993-03-09 | |||
| JPH06254794A | 1994-09-13 |
Other References:
See also references of EP 1132787A4
Attorney, Agent or Firm:
Sasajima, Fujio (Toranomon 1-chome Minato-ku Tokyo, JP)
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