| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reach type forklift capable of preventing destabilization of front and back positions of a fork due to shortage of hydraulic oil in a reach cylinder, and a control system thereof. <P>SOLUTION: The control system 10, which controls an electric motor 22 for supplying hydraulic oil to a reach cylinder 6, includes a memory section 11 a correspondence relationship between a rotation frequency of the electric motor 22 and the torque command value is stored, a rotation frequency acquisition section 12 acquiring repeatedly the rotation frequency of the electric motor 22, a command value selection section 13 referring the correspondence relationship stored in the memory section 11 to select the torque command value capable of maintaining the rotation frequency of the electric motor 22 acquired from the rotation frequency acquisition section 12 to the corresponding rotation frequency, and an electric motor control section 14 which makes an output torque of the electric motor 22 to the command torque on the basis of the torque command value selected from the command value selection section 13, wherein the correspondence relationship is characterized by having a lowering tendency of the torque command value with increases in the rotation frequency. <P>COPYRIGHT: (C)2012,JPO&INPIT |
