Abstract: The present invention relates to a multifunctional locking device for a container of a trailer, in which a lock is operated by the weight of the container, whereby it is possible to automatically or manually lock the container to the trailer, and it is possible to prevent movement and disengagement of the container due to the increased fixing force of the container during trailer operation, thereby improving stability.

Abstract: The present invention relates to a multifunctional locking device for a container of a trailer, in which a lock is operated by the weight of the container, whereby it is possible to automatically or manually lock the container to the trailer, and it is possible to prevent movement and disengagement of the container due to the increased fixing force of the container during trailer operation, thereby improving stability.

Abstract: The present invention provides a locking apparatus of a container for a trailer that can fixing a container by automatically or manually coupling the container to a trailer, using a locking pin that is operated by the weight of a container, and can improve stability by preventing movement and separation of a container from a trailer in transportation. The locking apparatus includes: an outer housing; an inner housing; an automatic actuator; a locking pin having a cylindrical body, a head, a first locking protrusion, and a guiding portion; a guide member; and a manual actuator having an extension, a length adjusting portion, and a lever.