When an opening/closing detecting portion detects that a cover closed, a control portion outputs a signal to an electromagnetic locking switch of a locking mechanism to suppress opening and closing so that the cover enters a state in which the cover cannot be opened by an ordinary operation of a handle or a depression operation of an operation pedal. After that, when an operator operates an operation panel to input start of a process of cleaning, disinfection, etc., the control portion causes a cleaning/disinfecting portion to function and predeterminedly execute the inputted process. Then, when completion of the process of cleaning, disinfection, etc., is detected by a cleaning/disinfection detecting portion, the control portion releases the suppression of opening and closing of the cover by the locking mechanism and displays the completion of the process of cleaning, disinfection, etc., on the operation panel.
