WARNING DEVICE FOR OPENING AND CLOSING DOOR

PURPOSE:To reduce unrequired warning and to properly notify danger information to each person on both sides of the door. CONSTITUTION:When a person comes in the detection range E1 of a pyroelectric infrared ray sensor 1a provided at the side of pulling a door B, the output is performed from the 1st sensor part 1 and a retriggerable one-shot pulse generation circuit 3 outputs the pulse with pulse width of a few seconds to an AND gate 5. In this case, when a person comes in the detection range E2 which is narrower than that of the sensor 1a of a pyroelectric infrared ray sensor 2a provided at the side of pushing the door B, the output is sent from a sensor part 2 and a one-shot pulse generation circuit 4 outputs pulses through an AND gate 5 to the 1st and 2nd warning generation parts 6 and 7. Thus, the voice telling 'ATTENTION. DOOR IS OPENING' comes from a speaker 6b so as to take the attention of a person at the side of pulling the door and the voice telling 'A PERSON IS ON THE OTHER OF THE DOOR PLEASE OPEN IT SLOWLY' comes from a speaker 7b so as to notify the presence of a person on the other side of the door to the man at the side of pushing the door.