Abstract
The purpose of this study to develop of a cart that automatically moves in front of a human to support carrying burdens. In this paper, we describe two topics: development of a unit for driving the cart, and the method for the cart to move along the specified path. The drive unit can be attached to and detached from an ordinary cart easily. The drive unit rotates the rear wheels of the cart by pressing the driving wheel of the unit to the rear wheels. When the cart moves automatically, it precedes the human and moves along the pre-defined path. The path is assumed to be a combination of straight lines and arcs. We verified that the cart could track a U-shaped path without any problems.
