Abstract: A retainer for securing together upper and lower shipping containers includes interconnected upper and lower retaining members each adapted to be inserted into a hole in a corner piece of a respective one of the upper and lower shipping containers, and at least one swing member disposed inside the lower retaining member. The upper retaining member has a top end aligned with a bottom end of the lower retaining member along an axial line of the retainer. The swing member includes a lower pivot portion connected pivotally to the lower retaining member, and an upper engaging portion which is proximate to the axial line in a non-engaging position and when the axial line of the retainer is substantially vertical, and which moves away from the axial line in an engaging position when the axial line of the retainer is inclined and non-vertical.

Abstract: A retainer for securing together upper and lower shipping containers includes interconnected upper and lower retaining members each adapted to be inserted into a hole in a corner piece of a respective one of the upper and lower shipping containers, and at least one swing member disposed inside the lower retaining member. The upper retaining member has a top end aligned with a bottom end of the lower retaining member along an axial line of the retainer. The swing member includes a lower pivot portion connected pivotally to the lower retaining member, and an upper engaging portion which is proximate to the axial line in a non-engaging position and when the axial line of the retainer is substantially vertical, and which moves away from the axial line in an engaging position when the axial line of the retainer is inclined and non-vertical.