Shutter open-closing apparatus, shutter open-closing system including the same, and shutter open-closing method

A shutter open-closing system comprising:

• a main frame having an access space formed therein;
• a first main door on the main frame to be movable in a first axial direction;
• a second main door on the main frame to be movable in the first axial direction;
• a first shutter open-closing apparatus comprising a first main body coupled to the first main door to move together with the first main door, a first shutter pushing unit on the first main body to be movable in the first axial direction, a first shutter connected to a first link unit to move in response to an operation of the first link unit connected to the first shutter pushing unit, and a first elastic unit providing a restoring force by an elastic force to the first shutter pushing unit;
• and
• a second shutter open-closing apparatus comprising a second main body coupled to the second main door to move together with the second main door, a second shutter pushing unit on the second main body to be movable in the first axial direction, a second shutter connected to a second link unit to move in response to an operation of the second link unit connected to the second shutter pushing unit, and a second elastic unit providing a restoring force by an elastic force to the second shutter pushing unit.

A shutter open-closing method comprising:

• moving a first main door, which is opened and closed, and a first main body coupled to the first main door, in a first direction that is parallel to a first axial direction;
• moving a second main door, which is opened and closed, and a second main body coupled to the second main door, in a second direction that is opposite to the first direction;
• making a first shutter pushing unit on the first main body be in contact with a second shutter pushing unit on the second main body;
• moving the first shutter pushing unit in the second direction and moving the second shutter pushing unit in the first direction;
• and
• moving a first shutter connected to the first shutter pushing unit, in a second axial direction crossing the first axial direction, and moving a second shutter connected to the second shutter pushing unit, in the second axial direction.