Abstract: An improved container having caterpillar mechanism for loading/unloading of cargos comprises a bottom plate formed with caterpillar mechanism and left/right side walls with two lateral openings. During loading/unloading cargos, a conveyor having the same level height as the caterpillar belt is used to quickly accept the whole cargos being moved out on belt by means of pushing/pulling force exerted on the cargos.

Abstract: A extensible and retractable cargo container, comprises a top portion, a middle portion and a lower portion sleeve jointed together with each other, and further comprises a plurality set of block mechanisms for holding the top portion, the middle portion and the lower portion set in an extensible status, and a plurality of buffer rods for buffering the weight from the top portion, the middle portion and the top portion during retracting.

Abstract: A contamination-free freight and storing system for containerized bulk goods adapted to the freight and storage of granular or powdered goods, comprises an improved container satisfying ISO standard, an unloading tank with a top opening, a lifting device within the unloading tank, a suction filter device and a container freight device. The bottom board of the container comprises two separate bottom panels, which are placed above the top opening of the unloading tank while unloading, and are activated by the lifting device and elevated inwardly to expose the two sides of the base of the container so that the granular goods inside the container can slide into the unloading tank. The powder formed from the material seepage can be drawn and filtered by the suction filter device and then released into the atmosphere.

Abstract: A gravity unloading method for cargo box having split bottom plates. A pair of rectangular split bottom plates abut at one of the long sides of the bottom plates and pivoted near the other of the long sides thereof on the bottom of the cargo box. Force is applied by power devices beneath the bottom plate, causing the split bottom plates to turn pivotally and become inclined. A side plate is disposed vertically at the edge of each of the long sides of the bottom plate. The ends of the side plates adjacent the bottom plate can be pivotally turned open through the free ends turning up by a linkage such that the articles located on the split bottom plates can completely slide out by their own weight from both sides.