To simplify equipment setup work and improve operating efficiency.

In this travel gear of a movable body MB wherein a travel driving means MD for traveling and driving the movable boy at the travel speed commanded by a travel control means is installed in the movable body MB reciprocatively moving within the setting range, while the travel control means MD is constituted so as to perform the speed command of a setting decelerating pattern to the travel driving means MD in time of stopping the movable body MB, it is provided with a velocity sensitive means VS detecting a speed of the movable body MB, and the travel control means MD executes an emergency stopping process making the movable body MB into an emergency stop when velocity in the movable body MB has come to be higher than the velocity to be specified by a setting upper limit decelerating pattern being set up to be higher than the setting decelerating pattern, on the basis of detection information of the velocity sensitive means VS.