Structure for fixing movable device

A structure for fixing a movable device, the structure comprising:

• a rail unit configured to be mounted inside a floor of a vehicle;
• a storage part configured to be movable along the rail unit;
• and
• a fixing unit disposed on the storage part adjacent to the rail unit, the fixing unit being configured to limit movement of the storage part,
• wherein the fixing unit comprises:
• a housing disposed in the storage part;
• a locking rod disposed in the housing and configured to be selectively insertable into a first fixing bracket disposed on the rail unit;
• a first limiting rod configured to selectively limit movement of the locking rod in a vertical direction;
• and
• a second limiting rod configured to selectively limit movement of the first limiting rod in a state of separation condition in which the first limiting rod is separated from the locking rod.