Automatic safety door device in construction site
PURPOSE: An automatic safety door device in a construction site is provided to prevent safety accident of operators and to improve efficiency of work. CONSTITUTION: An automatic safety door device in a construction site comprises right and left doors(30a,30b) a frame(40) a sensor(50) a control valve(60) a door opening and closing member(70) and a fastening member(80) The right and left doors are opened and closed while revolving. The frame is installed on top of the right and left doors. The sensor is located on top of the frame and checks the opening and closing of an entrance door(3) of a cage(1) The control valve is connected to the sensor and operated with a sensing signal of the sensor. The door opening and closing member is connected to the control valve. The right and left doors are closed and opened with a control signal of the control valve. The fastening member is connected to the control valve. The right and left doors are locked with the control signal of the control valve.