Apparatus for automatically locking container

An apparatus for automatically locking a container that locks and unlocks a container loaded on a trailer or a railroad vehicle, the apparatus comprising:

• a cylindrical housing of which an internal cross-section is bent in a curved shape;
• a top plate installed on a top of the housing;
• a bottom plate installed under the housing;
• an elevation unit installed to move up and down in the housing;
• a locker installed in the elevation unit to move up and down together and installed to rotate left and right to lock and unlock a container;
• a guide being erect at a center of the bottom plate, inserted in a lower portion of the locker, and guiding up-down movement and rotation movement of the locker;
• a first elastic supporting member installed between the bottom plate and the elevation unit and elastically supporting upward the elevation unit;
• and
• a second elastic supporting member installed between the locker and the guide and elastically supporting upward the locker,
• wherein the housing includes:
• a plurality of protrusions formed with regular intervals circumferentially on an outer side and protruding outward;
• and
• a plurality of recessions extending between the protrusions and recessed inward.