Patent ID: 7721395

Claim:
An automatic container coupling tool adapted for disposing between a pair of container including a lower container and an upper container, stacked one another for preventing a displacement thereof, comprising: a coupling tool body having a coupling platform; a bottom engager downwardly extended from said platform and adapted to be inserted into a top corner fitting housing of said lower container, wherein said bottom engager comprises an engager neck and a pair of opposed projecting lugs sidewardly provided at a lower edge of said engager neck to define an elongated engager plate and define a pair of holding cavities between each said projecting lug and said coupling platform, wherein said elongated plate is correspondingly shaped to match an opening of said corner fitting housing so as to enable said bottom engager to be inserted into said top corner fitting housing and shifted between an engaging position and a disengaging position; wherein at said disengaging position, said elongated plate is capable of being freely extracted from said corner fitting housing, at said engaging position, said bottom engager is rotated forcing a ceiling wall of said top corner fitting housing received within said holding cavities to interlock said bottom engager with said lower container; and a top guiding protrusion upwardly extended from said platform and adapted to be inserted into a bottom corner fitting housing of said upper container, wherein said top guiding protrusion comprises a lower guiding slope defined at a front side of said top guiding protrusion and an upper retaining shoulder provided at a rear side of said top guiding protrusion, such that after said bottom engager is interlocked within said lower container in said engaging position, said upper container is capable of being lowered for aligning said bottom corner fitting housing with said coupler tool body wherein an opening edge of said bottom corner fitting housing is slides against said guiding slope so as to rearwardly shift said top guiding protrusion with respect to said bottom corner fitting housing thus pushing said upper retaining shoulder in a shoved manner into said bottom corner fitting housing to retain said upper container in position above said coupling tool.