| 摘要 |
The invention describes a system for locking and unlocking containers truck chassis, railroad cars, airplane cargo decks, each other when loaded onto ships or in container yards and to other bases. The invention uses the energy exerted by lifting devices including lifting spreaders and fork lifts to create tension on a connecting line which rotates a locking leg housed in the lower corner fitting of a container to unlock the container from a base beneath it. The invention is comprised of a plate and spring housed in an upper corner fitting of a container, a line connected to the plate and guiding eyes to route a line from the plate to a locking leg housed in a lower corner fitting of a container. When the twist lock of a lifting spreader mates with the upper corner fitting of a container it forces the plate and spring in the upper corner fitting downward. A connecting line, which is attached to the plate, is also pulled downward creating a pulling force which pulls the locking leg, housed in the lower corner fitting, causing it to rotate such that the locking leg aligns with the access slot of a base beneath the container such that the container and locking leg can be lifted clear of the base and vice versa. A connecting line can also be connected to multiple locking legs and lead such that when the tine of a fork lift lifts a container the connecting line is forced upwards creating a pulling tension causing the locking legs to rotate such that the container can be lifted clear of a base and vice versa.
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