PURPOSE: A vacuum glass keeping the space between glasses under vacuum status is provided for use as a glass of building or greenhouse demanding heat insulation and soundproofing. CONSTITUTION: The vacuum glass is characterized in that the space between glasses is vacuumed by pulling out the air between glasses, where the space is kept by silica with a size as small as tens of micrometers, Accordingly, silica is invisible and the area taken by silica is negligible as it corresponds to 1/100-1/1000 of glass. Also, a frame of the vacuum glass is sealed by chemicals and heat, preferably heat.

manufacturing glass vacuum for protact heat and vibration

PROBLEM TO BE SOLVED: To detect non-operation of a crime prevention device in the crime prevention device for detecting that a shutter curtain is prized open in an electric shutter for architecture. SOLUTION: The crime prevention device is configured of a crime prevention control part 9. The crime prevention control part 9 is connected with a total closure detecting switch 10 to be switched by changing of the shutter curtain to a totally closed posture, and with a shutter control part 7 for controlling an opening/closing machine 3 which opens/closes the shutter curtain. The crime prevention device is provided with a non-operation diagnosing part which detects that switching of the total closure detecting switch 10 is non-operated during process of closing operation of the shutter curtain, and operates a means for informing non-operation. COPYRIGHT: (C)2006,JPO&NCIPI

Crime prevention device in electric shutter for architecture

PURPOSE:To prevent the damage of a driving unit by forcibly releasing motor driving when motor locking at the time of full opening or full closing is not detected within a preset time. CONSTITUTION:A timer device for measuring the driving times of motors 7, 12 opening and closing a window section or a blind device such as a roll screen, a control section commanding the forced stoppage of motor driving when there is no operation-completion input, stoppage input or inversion control input within a fixed time, a buzzer 16 as an alarm device notifying the generation of abnormality at the time of forced stoppage and a display unit 17 are arranged to a control system. When motor locking is not detected within a preset fixed time, motor driving is released forcibly as abnormality. Accordingly, the damage of the driving unit of the motor, a speed reducer, etc., can be prevented while a user is warned of the abnormality of operation.

Lighting window device

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