Patent ID: 9206019
Filing Date: 2015-12-08
Classification: B66C

Abstract:
1. A working vehicle, comprising: a boom provided on the working vehicle; a detachable jib being detachably attached to the boom; a winch where a wire rope being wound around and configured to raise and lower the detachable jib attached to the boom by using the wire rope; a detachable detection part provided on the detachable jib, configured to detach from the boom together with the detachable jib, having a conductive rotating weight and an arc-like resistance plate contacting with the conductive rotating weight at a varying location in accordance to an angle of the detachable jib, and configured to output a divided voltage of the resistance plate according to a contact location of the conductive rotating weight as a detected angle of the detachable jib for determining whether or not an overload detection condition occurs or to perform overload prevention control; an acquisition part configured to acquire the angle of the detachable jib based on a feed length of the wire rope from the winch; and a determination part configured to determine that a failure occurs when a difference between the angle detected by the detachable detection part and the angle acquired by the acquisition part exceeds a predetermined tolerance.