Automatic door with automatic lock system
AssigneeYoshida Kogyo K. K.
InventorYukio Yoshida
Life of this patent
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Abstract
An automatic door including a door body connected to a chain or belt extending between and wound around a drive pulley disposed on one side of a door opening and a driven pulley disposed on the other side thereof in which the door body is actuated to open and close by allowing the drive pulley to be rotated forwardly or reversely by an electric motor connected through a main switch and a controller to a main electric power supply source, comprises an apparatus for automatically moving the door body to its closing-stop point when the supply of electric power to the motor is interrupted by the OFF operation of the main switch, and a locking apparatus for automatically locking the door body in its closing-stop position at that time.
Claims8
An automatic door which includes a door body connected to a chain or belt means extending between and wound around at least one drive pulley disposed on one side of a door opening and at least one driven pulley disposed on the other side thereof, wherein the door body is actuated to open or close by allowing the drive pulley to be rotated forwardly or reversely by means of an electric motor connected through a main switch and a controller to a main electric power supply source, characterized in that the automatic door further includes a means for automatically moving the door body to its closing-stop point when the supply of electric power to the motor is interrupted by the OFF operation of the main switch, and at least one locking means for automatically locking the door body in its closing-stop point at that time.
Dependencies are inferred from the claim text.