Free folding bed, displacement means for same, and method for operating same

Displacement means for a free folding bed, comprising:

• an upper body support unit and a lower body support unit, which are arranged on a main frame and of which each includes a plurality of divided parts having a vertical rotating shaft, wherein the divided parts of the respective supports support units rotate the support units arranged on a plurality of vertical lines about the vertical rotating shafts;
• a common elevating body having a vertical shaft and a wing frame to move the divided parts of each support unit, arranged on the same vertical line, at a time;
• and
• an elevating member for rotating the wing frame about the vertical shaft.

A method for operating a free folding bed which includes:

• a main frame;
• a support panel arranged on the main frame and comprising an upper body support unit and a lower body support unit, each of which includes a plurality of divided parts each having a vertical rotating shaft;
• vertical displacement means for rotating each support unit about the vertical rotating shaft so as to lift or lower the support unit;
• horizontal displacement means for rotating each support unit about a horizontal rotating shaft to lift or lower the support unit;
• and a controller configured to move the vertical displacement means and the horizontal displacement means,
• wherein each support unit comprises three divided parts forming the same vertical line, and the divided parts of the support unit are arranged on three vertical lines,
• the vertical displacement means performs a first vertical folding mode to lift or lower the divided parts of each support unit, which are arranged on a first vertical line and a second vertical line, or performs a second vertical folding mode to lift or lower the divided parts of each support unit, which are arranged in the second vertical line and a third vertical line, according to control of the controller, and
• a safety lifting mode is performed to lift the divided parts arranged on the third or first vertical line, when the first vertical folding mode or the second vertical folding mode is performed.