Bed robot apparatus

A bed robot apparatus comprising:

• a mattress partitioned in a longitudinal direction to correspond to a longitudinal position of an object;
• a porous flexible sheet which reciprocates in a lateral direction on an upper surface of the mattress for each partitioned part;
• inlet and outlet ports formed in side surfaces of the mattress for each partitioned part such that the porous flexible sheet exits from a first side of the mattress, passes over the upper surface of the mattress, and enters a second side opposite to the first side;
• a plurality of electrically driven first rollers on which the porous flexible sheet is wound and which rotate in a first direction;
• a plurality of second rollers attached to the mattress from one or more side surfaces of the mattress, the plurality of second rollers coupled to the plurality of electrically driven first rollers and driven by the rotation of the plurality of electrically driven first rollers in a second direction opposite the first direction, wherein the porous flexible sheet is placed over the plurality of second rollers;
• and
• an air circulator disposed under the mattress and configured to spray air through a plurality of air circulation holes vertically perforated in the mattress to reduce a frictional force between the porous flexible sheet and the upper surface of the mattress and to supply ventilation air to the object on the mattress,
• wherein the air circulator sprays air through the plurality of air circulation holes when the plurality of electrically driven first rollers rotate in the first direction and the plurality of second rollers are driven in the second direction.