Patent ID: 8775034

Claim:
A shift control system for industrial vehicle, comprising: a vehicle speed detection device that detects a vehicle speed of an industrial vehicle; a transmission device that shifts up and shifts down a speed stage of a transmission; a shift control device that permits shift up by the transmission device when a vehicle speed detected by the vehicle speed detection device becomes equal to or greater than a shift up permission vehicle speed; a height position detection device that detects a height position of a working machine device; a forward/backward switch device that switches the industrial vehicle between forward travel and backward travel; and a shift up control switch selection device that switches between normal control, in which shift up is performed by the transmission device when the vehicle speed becomes equal to or greater than the shift up permission vehicle speed regardless of a travel direction of the industrial vehicle set by the forward/backward switch device and the height position of the working machine device detected by the height position detection device, and delay control, in which shift up timing is delayed by changing the shift up permission vehicle speed with respect to the normal control depending on the travel direction of the industrial vehicle or depending on the travel direction of the industrial vehicle and the height position of the working machine device.