Cleaning apparatus

A cleaning apparatus, comprising:

• a rotary shaft supported to be axially rotatable;
• a first fluid passage formed in the rotary shaft;
• a pivot rotary shaft supported to be axially rotatable in a direction substantially orthogonal to the rotary shaft, and revolved with the rotary shaft as a rotational center;
• a second fluid passage provided in the pivot rotary shaft and being in communication with the first fluid passage;
• a nozzle provided on the pivot rotary shaft and for spraying a cleaning fluid to an object to be cleaned, the cleaning fluid being supplied via the first fluid passage and the second fluid passage;
• an outer tube surrounding the rotary shaft and being supported to be axially rotatable;
• a first bevel gear provided on the outer tube;
• a second bevel gear provided on the pivot rotary shaft and meshing with the first bevel gear;
• a first drive source for rotating the rotary shaft;
• a second drive source for rotating the outer tube;
• and
• a control device for controlling the operations of the first drive source and the second drive source, wherein
• the nozzle is inserted into the object to be cleaned, and a cleaning fluid is sprayed from the nozzle to clean the inner surface of the object to be cleaned, the cleaning apparatus being characterized in that
• the control device is capable of operating the first drive source and the second drive source at the same time, and is also capable of controlling rotational frequencies of both the drive sources to change a movement trajectory of the nozzle when the nozzle sprays the cleaning fluid.