Abstract: A forklift includes forks, cylinders for causing the forks to perform an ascending/descending operation in accordance with the flow rate of hydraulic oil, a first valve for controlling the flow rate of the hydraulic oil in accordance with an energizing current, a second valve 6 for regulating the flow rate of the hydraulic oil in accordance with cylinder pressure, and a control portion that calculates the flow rate to be regulated by the second valve, on the basis of cylinder pressure detected by a pressure sensor, calculates a current command value for the energizing current, with the flow rate to be controlled by the first valve being set equal to the regulated flow rate, and changes the energizing current in two stages, with the current command value as the upper limit of the energizing current, thereby decelerating the forks in two stages when stopping the ascending/descending operation.

Abstract: An industrial vehicle includes a holding portion for holding a load, a raising/lowering portion for raising/lowering the holding portion, a control valve for controlling the amount of hydraulic oil supplied to or discharged from the raising/lowering portion, and a control device for supplying an energizing current to the control valve. The control device includes a speed calculation unit for calculating first and second speed command values for an ascending/descending speed, a current calculation unit for calculating first and second current command values for the energizing current, and a current supply portion for supplying first and second energizing currents to the control valve, thereby offsetting a first vibration generated in the load upon start of supplying the first energizing current, by a second vibration generated in the load upon start of supplying the second energizing current.

Abstract: A forklift includes forks, cylinders for causing the forks to perform an ascending/descending operation in accordance with the flow rate of hydraulic oil, a first valve for controlling the flow rate of the hydraulic oil in accordance with an energizing current, a second valve 6 for regulating the flow rate of the hydraulic oil in accordance with cylinder pressure, and a control portion that calculates the flow rate to be regulated by the second valve, on the basis of cylinder pressure detected by a pressure sensor, calculates a current command value for the energizing current, with the flow rate to be controlled by the first valve being set equal to the regulated flow rate, and changes the energizing current in two stages, with the current command value as the upper limit of the energizing current, thereby decelerating the forks in two stages when stopping the ascending/descending operation.

Abstract: An industrial vehicle includes a holding portion for holding a load, a raising/lowering portion for raising/lowering the holding portion, a control valve for controlling the amount of hydraulic oil supplied to or discharged from the raising/lowering portion, and a control device for supplying an energizing current to the control valve. The control device includes a speed calculation unit for calculating first and second speed command values for an ascending/descending speed, a current calculation unit for calculating first and second current command values for the energizing current, and a current supply portion for supplying first and second energizing currents to the control valve, thereby offsetting a first vibration generated in the load upon start of supplying the first energizing current, by a second vibration generated in the load upon start of supplying the second energizing current.