Opening/closing device and partitioning system for manufacturing machine

The present invention relates to a partitioning system for enclosing a large-size manufacturing machine such as laser manufacturing machine and for forming a defined space, and the present invention also relates to an opening/closing device to be provided on an opening to the partitioning system. The present invention provides an opening/closing device, comprising an opening disposed on a partitioning system, driving wheels mounted on each side of lower end of the opening, driven wheels mounted on each side of upper end of the opening, and flexible members to be run between the driving wheels and the driven wheels, wherein one end and the other end of each of the flexible members are engaged with an opening/closing panel respectively, the driving wheels on both sides are driven synchronously and the opening/closing panel is moved up and down.