Abstract: The invention provides a platform gate door device equipped with highly reliable photoelectric obstacle detectors that do not malfunction by disturbance light that moves, such as sunlight. The platform gate door device comprises a platform gate door 13 installed on a platform at a position where passengers get on and off a vehicle; a door control device 4 for opening and closing the platform gate door; at least two photoelectric obstacle detectors 2 disposed between the platform gate door 13 and the vehicle for detecting a presence of an obstacle, wherein each obstacle detector 2 has a light emitter 21 and a light receiver 22 disposed on either side of an opening 12 of the platform gate door, and wherein the obstacle detectors 2 are arranged so that the direction of emission from the light emitters are mutually inversed; and a switching means 3 for activating one of the plurality of obstacle detectors.

Abstract: The invention provides a platform gate door device equipped with highly reliable photoelectric obstacle detectors that do not malfunction by disturbance light that moves, such as sunlight. The platform gate door device comprises a platform gate door 13 installed on a platform at a position where passengers get on and off a vehicle; a door control device 4 for opening and closing the platform gate door; at least two photoelectric obstacle detectors 2 disposed between the platform gate door 13 and the vehicle for detecting a presence of an obstacle, wherein each obstacle detector 2 has a light emitter 21 and a light receiver 22 disposed on either side of an opening 12 of the platform gate door, and wherein the obstacle detectors 2 are arranged so that the direction of emission from the light emitters are mutually inversed; and a switching means 3 for activating one of the plurality of obstacle detectors.