Elevator door opening and closing device and opening and closing control method

The present invention discloses a switching device and a switching control method for an elevator door, in the switching device for an elevator door, set the light emitting unit and light-receiving unit in a safe guide plate, the safety guides are respectively disposed adjacent to two elevator door frame side Ends. Light emitting means for switching the direction of the elevator door station side is inclined toward the reflected detection light emitted. Reflection detecting reflected light is incident on the platform of an obstacle to the light receiving unit. If the detected reflected light is incident on the light unit, the reflection from the reflection detection means outputs a detection signal, and an operation to reverse the direction of the elevator door opening direction.