mobile stacker 

mobile stacker / mobile stacker conveyor

https://www.zoomryhi.com/Mobile-Stacker-for-conveyor-system-p.html

The mobile stackers are used to improve tipping onto conical or kidney-shaped stockpiles. The direct material transport from the crushing or screening plant to the dedicated stockpile means that additional material movements with the wheel loader can be avoided. This reduces operating costs, increases operational reliability and efficiency.

Mobile stacker cranes are used for efficient logistics processes on construction sites. Transporting material directly from the crushing or screening plant to a dedicated stockpile means that additional material movement by wheel loaders can be avoided. This reduces operating costs and increases operational reliability and efficiency.