SAFETY SYSTEM OF A BUS DOOR WHICH SECURES SAFETY OF PASSENGER BY OPENING A DOOR USING A SAFETY UNIT

摘要

PURPOSE: A safety system of a bus door is provided to open a door by rotating a drive shaft by supplying air to a closed pipe of a cylinder through an adjust valve.;CONSTITUTION: A safety system of a bus door comprises a cylinder(200), an adjust valve(300) and a safety unit(400). The cylinder rotates forwardly or reversely a drive shaft(210) in order to open or close the door. The adjust valve selectively supplies air to an opened tube and closed pipe of the cylinder from an air tank(100). When door is closing or an object is stuck between the door and the body, the drive shaft rotates in order to open the door by supplying the air to the closed pipe through the adjust valve using the safety unit.;COPYRIGHT KIPO 2010