PURPOSE: To prevent the hazard which will be caused by an unexpected backward movement, by providing a backward movement detector so as to control backward movement.
CONSTITUTION: The tractor A is provided with a coupling part 1 for trucks B to be dragged, which can be freely attached and detached, a running gear 2, a driving machine 3 for the funning gear 2, a forward and backward movement changing gear 4, the backward movement detector 5, a backward running stopping device 6, a changing tool 7 which changes the operating and non-operating states of the stopping device 6, and others. The backward movement detector 5 is provided in the coupling part 1 so that the detection is performed based on the fact that the tractor A and the truck B to be dragged are approached within a specified size owing to the backward movement of the tractor A. The detector 5 is operated by the contact of a part to be coupled 8.
JPS5066314U | 1975-06-14 |