A washing device for plus size bras includes a shell which consists of upper and lower shell portions. If the travel load of the vehicle is equal to or greater than a predetermined value, a higher value is used for the minimum engine rotation speed compared to a case when the travel load of the vehicle is smaller than the predetermined value. The ultraviolet irradiators 6 include a plurality of UVLEDs 63 provided on a center of a bottom surface of a concave portion 62 of the irradiators 6 and arranged in the sub-scanning direction, and a plurality of partition walls 64 provided between the UVLEDs 63 and having a flat plate shape extended in the main scanning direction.