Movable carriage

摘要

A movable carriage having front wheels and rear wheels includes, a detection unit detecting a direction caused by the operator pushing or pulling a grip unit, a rear-wheel steering angle changing unit changing a steering angle to cause a phase of the rear wheel to be the same as or opposite to the phase of the front wheel according to whether an angle between the detected direction and a center axis of the movable carriage is a predetermined angle or smaller, and a front-wheel steering angle changing unit changing a steering angle to cause a phase of the front wheel to be the same as or opposite to the detected direction according to whether the detected direction is a direction in which the movable carriage is pushed or pulled, when the angle between the detected direction and the center axis of the carriage exceeds the predetermined angle.

主权项

1. A movable carriage having a front wheel and a rear wheel, comprising:
a grip unit configured to be held and pushed or pulled by an operator for operating a moving direction of the movable carriage; a detection unit configured to detect a direction in which the operator pushes or pulls the grip unit; a rear-wheel steering angle changing unit configured to change a steering angle so as to cause a phase of the rear wheel to be the same as or opposite to a phase of the front wheel according to whether an angle between the detected direction and a center axis of the movable carriage is a predetermined angle or smaller; and a front-wheel steering angle changing unit configured to change a steering angle so as to cause a phase of the front wheel to be the same as the detected direction when the movable carriage is pushed, and to cause the phase of the front wheel to be opposite to the detected direction when the movable carriage is pulled.