How to Unload a Container House from a Trailer

The method of unloading a container house from a trailer depends on the type of vehicle group, with common methods including in-situ lifting, side-tipping, and rear-tipping. The specific operations are as follows:

In-situ Lifting Trailer

The self-loading and unloading vehicle group for container houses adopts an in-situ lifting method. Taking the bracket-type in-situ lifting as an example: When loading, the container is first placed on a dedicated bracket. The tractor and semi-trailer are then backed under the bracket. The hydraulic lifting mechanism on the vehicle is used to lift the container, which is then withdrawn from the bracket and lowered so that its four corners are secured in the trailer's twist locks. Finally, the vehicle group is driven out. The unloading process is the reverse: the container is first lifted by the hydraulic mechanism to detach it from the twist locks, then the vehicle group is moved under the bracket, and the container is slowly lowered onto the bracket. The advantage of this method is that it can independently complete container loading, unloading, and transportation operations without external machinery, making it suitable for places with small container volumes and a lack of loading and unloading equipment, especially for medium- and short-distance 'door-to-door' transportation or as a connecting device between container ports, yards, and road transportation.

Side-tipping Trailer

The skeleton-type side-tipping semi-trailer for containers uses an engine to drive a hydraulic mechanism, which in turn drives a lifting mechanism to tilt and unload the cargo. Its hydraulic jacks are evenly distributed in a straight line on one side of the trailer, providing strong lifting force unaffected by the length of the cargo box. The lifting height is relatively low, ensuring good stability during unloading. When unloading, the engine is started, and the lifting mechanism is controlled by the hydraulic system to tilt the cargo box to a certain angle on one side, causing the container to tilt and the cargo to slide out of the cargo box. However, side-tipping trailers have high requirements for the unloading site, which needs to be large, wide, and flat, and there may be issues such as tire burial or incomplete unloading during the process.

Rear-tipping Trailer

The rear-tipping semi-trailer also relies on an engine-driven hydraulic mechanism to achieve unloading. Its trailer frame and cargo box are reasonably designed with a low center of gravity, making it less likely to tip over during lifting. When unloading, the cargo box is controlled by the hydraulic system to tip backward, causing the container to follow and the cargo to be unloaded from the rear of the cargo box. This type of vehicle can realize automated handling of containers, saving manpower and material resources, and improving cargo transportation efficiency. Currently, it can achieve automated loading and unloading of containers of different sizes, such as 20-foot and 25-foot containers.