Tank device

A tank device comprising:

• a tank body storing a liquid;
• and
• a return filter provided inside the tank body and protruding downward from an upper surface of the tank body, the return filter including a filter medium filtering the liquid and a filter case internally provided with the filter medium, the return filter causing the filtered liquid to flow into the tank body,
• wherein side surfaces of the tank body are provided with a first plate-shaped portion and a second plate-shaped portion provided with an opening larger than a diameter of the filter case and being installed parallel to a bottom surface of the tank body;
• the first plate-shaped portion and the second plate-shaped portion are spaced apart at a predetermined distance in a height direction;
• in a side view, the first plate-shaped portion and the second plate-shaped portion extend in parallel with one another, and cross the filter medium;
• in a plan view, the first plate-shaped portion and the second plate-shaped portion are disposed between the tank body and the filter case, and
• in the plan view, the first plate-shaped portion and the second plate-shaped portion are non-overlapped with the filter case wherein the first plate-shaped portion is divided into a third plate-shaped portion and a fourth plate-shaped portion, the second plate-shaped portion is divided into a fifth plate shaped portion and a sixth plate-shaped portion, in the plan view, a third plate-shaped portion and a fourth plate-shaped portion are non-overlapped with each other, in the plan view, a fifth plate-shaped portion and a sixth plate-shaped portion are non-overlapped with each other, the tank body includes a first side surface and a second side surface opposite each other and a third side surface and a fourth side surface opposite each other, the third plate-shaped portion and the fifth plate-shaped portion abut the first side surface, the second side surface, and the third side surface, the fourth plate-shaped portion and the sixth plate-shaped portion abut the first side surface, the second side surface, and the fourth side surface, and
• a flow path for the liquid is formed between the third plate-shaped portion and the fourth plate-shaped portion and between the fifth plate-shaped portion and the sixth plate-shaped portion.