Abstract: management device for managing the expiration date of food and drink arranged on a plate and including a camera for capturing a two-dimensional code on a cylindrical base of the plate, a barcode scanner for analyzing the two-dimensional code captured by the camera and extracting a plate number, a management main body for receiving the plate number output from the barcode scanner and collectively managing the traveling plates, and a DIO (Digital Input/Output) module. The DIO module is connected to a detection switch disposed on a downstream position of the camera and a discharge mechanism disposed on a downstream side of the detection switch to perform a bidirectional communication with the management main body. A separation distance between the camera and the detection switch is shorter than a diameter of the plate.

Abstract: A management device (5) for managing the expiration date of food and drink arranged on a plate includes a camera (20) for capturing a two-dimensional code (13A) on a cylindrical base (12A) of the plate, a barcode scanner (21) for analyzing the two-dimensional code captured by the camera (20) and extracting a plate number, a management main body (22) for receiving the plate number output from the barcode scanner (21) and collectively managing the traveling plates, and a DIO module (23). The DIO module (23) is connected to a detection switch (26) disposed on a downstream position of the camera (20) and a discharge mechanism (27, 28) disposed on a downstream side of the detection switch (26) to perform a bidirectional communication with the management main body (22). A separation distance LS between the camera (20) and the detection switch (26) is shorter than a diameter ? of the plate.