Safety securing system for operation lever of construction vehicle

A safety securing system for an operation lever of a construction vehicle, in which the construction vehicle includes a plurality of work equipments, each being driven by a hydraulic pump operating by an engine, an operation lever for generating a driving signal for the work equipments, and a safety lever for stopping the operation lever when the safety lever is locked out, the safety securing system comprising:

• a receiver for receiving a detection signal from an engine rpm detector detecting the engine shaft rpm, a control input detector of the operation lever, and a safety lever position detector, respectively;
• a data processor for deciding, on the basis of the signals received by the receiver, whether the engine starts, whether the operation lever is in the neutral position, and whether the safety lever is in operation, making a decision on whether to operate the work equipment, and memorizing, through a neutral position check bit of the data processor, whether the decision on the position of the operation lever is made;
• and
• an output for outputting, based on the result of process of the data processor, an engine stop signal, an alarm signal, and a driving signal outside according to the operation lever's control input.