MOTOR-DRIVEN CURTAIN DEVICE

PROBLEM TO BE SOLVED: To prevent the meshing part of a speed reduction gear mechanism between a motor and a roll curtain from being damaged as a result of inertial rotation of the motor if the curtain is manually operated and stopped near an open or closed position, when the motor is directly couple...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	NAKAOKA MOTOO
Format:	Patent
Sprache:	eng
Schlagworte:	CHECKS FOR WINGS COFFEE MILLS CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION DOMESTIC ARTICLES OR APPLIANCES ELECTRICITY FIXED CONSTRUCTIONS FURNISHINGS FOR WINDOWS OR DOORS FURNITURE GENERATION HUMAN NECESSITIES KEYS LOCKS SAFES SPICE MILLS SUCTION CLEANERS IN GENERAL WINDOW OR DOOR FITTINGS WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THEFUNCTIONING OF THE WING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent the meshing part of a speed reduction gear mechanism between a motor and a roll curtain from being damaged as a result of inertial rotation of the motor if the curtain is manually operated and stopped near an open or closed position, when the motor is directly coupled to the curtain without use of an electromagnetic clutch and the curtain is opened and closed as it is driven by the motor. SOLUTION: When a curtain has been moved near an open or closed position, limit switches 31, 32 for stopping a motor 19 by cutting off the power circuit 25 of the motor 19 are switched from one to the other, a short circuit is caused between both terminals of the motor 19 by short circuits 38, 39, and a current produced by the rotating motor 19 is passed through the short circuits 38, 39 so that the rotation of the motor 19 itself is braked by the current produced.