Mitsubishi Heavy Industries Limited

Mitsubishi Nichiyu Forklift Co., Ltd.

Mitsubishi Logisnext Co. Ltd.

Naoki Ishikawa

Katsumi Ueda

Masanobu Seki

Naoki Shibata

Tsutomu Kurihara

An accumulated use time for cargo handling vehicles is accurately displayed by a time measuring device even if the time measuring device fails and is replaced. Units such as a display unit and a control unit of the cargo handling vehicle each include a time measuring device and a storage device. The device may perform in a synchronization mode in which the difference between the accumulated use times of both devices is made the same and a synchronization inhibition mode in which the accumulated use times are not changed. The accumulated use times are communicated between the function units, and the accumulated use time of the cargo handling vehicle and the absolute value of the difference between the accumulated use times of both measuring devices are taken into consideration. The appropriate mode is selected and the time measurement is carried out in the selected mode.

Method for clocking cumulative operating time for a cargo-handling vehicle, and the cargo-handling vehicle by use of the method

A vehicle control unit and a vehicle equipped with the vehicle control unit are provided, the vehicle control unit being capable of preventing a shift change from being permitted in a direction opposite to a vehicle traveling direction caused by an erroneous operation of a shift lever during a traveling mode. In the vehicle control unit for controlling the vehicle on the basis of a shift range detecting unit configured to detect a shift range selected by a shift operation and a vehicle speed detecting unit configured to detect a vehicle speed, when the shift range detecting unit detects the shift range in a direction opposite to the vehicle traveling direction in a state where the vehicle speed detecting unit detects a vehicle speed not less than a first speed V, the vehicle control is carried out so that a compulsory deceleration is carried out by means of a deceleration unit provided in the vehicle instead of permitting the shift change corresponding to the shift range, the shift change being desirably permitted when the vehicle speed detecting unit detects that the vehicle speed decreases down to a vehicle speed not more than the first speed V.

Vehicle control unit and vehicle equipped with the same

A control deviceof an industrial vehicle which performs the control of actuating a parking brakeduring operator's absence in an industrial vehicle includes a seat switch, a vehicle speed sensor, and the parking brakecontrolled by a parking brake solenoid, and a counterwhich counts the elapsed time after the seat switchdetects the operator's absence. The control device sets the time corresponding to the time until the operator leaves the vehicle after the operator leaves the seat as a preset absence time. When the seat switchhas detected absence, a control signal which validates the parking brakeis output to the parking brake solenoid, thereby actuating the parking brakeif the vehicle speed shows a vehicle stopped state, and the elapsed time becomes equal to or more than the set absence time.

Control device of industrial vehicle, and industrial vehicle loaded with the device

A vehicle for cargo handling is equipped with a storage unit for storing a password, a password input unit, and a control unit for controlling selection of a normal operating mode with no restrictions on travel capability or cargo handling capability, an emergency operating mode where at least the travel capability of the vehicle is restricted, and a travel prohibited mode where neither the normal operating mode nor the emergency operating mode is selected. The control unit determines whether password entry is required when the vehicle is powered on and controls selection of the normal operating mode when password entry is required or when a correct password is entered, the emergency operating mode when emergency operation is indicated, or the travel prohibited mode when the normal and emergency operating modes are not selected within a predetermined specific amount of time or within a specific number of times of operation.

Vehicle for cargo handling

An accumulated use time measuring method for cargo handling vehicles and a cargo handling vehicle both enable accurate continuation of the use time till a display unit containing a time measuring device is replaced even if the time measuring device fails and prevention of false alteration after shipping while infallibly resetting the time measuring device to zero when the time measure device is shipped from the factory. The function units such as a display unit and a control unit of the cargo handling vehicle each include a time measuring device and a storage device. A synchronization mode in which the difference between the accumulated use times of both devices is made the same and a synchronization inhibition mode in which the accumulated use times are not changed and the time measurement is continued are provided. The accumulated use times are communicated between the function units, and the accumulated use time of the cargo handling vehicle and the absolute value of the difference between the accumulated use times of both measuring devices of the function units are taken into consideration. The corresponding mode is selected from the two modes, and thereby the time measurement using the accumulated use time stored in the storage device is carried out in the selected mode.

The use time till a display unit including an hour meter (a time measuring device) is replaced can be continued even if the time measuring device fails, and false alteration after shipping can be prevented while infallibly resetting the hour meter to zero when the vehicle equipped with the hour meter is shipped from the factory. The cargo handling vehicle includes a first storage device for accumulatively storing the vehicle use time measured by a first time measuring device provided in a display unit of the vehicle and a second storage device for accumulatively storing the vehicle use time measured by a second time measuring device provided in a control device. The control device allows the first and second storage devices to communicate the accumulated use times stored therein when the electric power of the vehicle is turned on. The control device compares the accumulated use times and writes the longer accumulated use time in the storage device storing the shorter one.

The issue is to show displayed items on a display device of a cargo-handling vehicle, where only a display device having a small display space can be used, so that operations accompanying the operating sequence of the cargo-handling vehicle can be performed. The device has a tilt angle sensor, which detects forward tilt or backward tilt by a mast provided at the front of the cargo handling vehicle, a hydraulic pressure sensor, which measures the supply hydraulic pressure to a lift cylinder that is provided on the mast and raises and lowers a fork, and a calculation unit, which converts the cylinder supply hydraulic pressure detected by said hydraulic pressure sensor to the weight of the cargo loaded on the aforementioned fork. A selection display area is also provided, which selectively displays the tilt angle and the weight in the same location outside of the vehicle speed display area. When the vehicle's power is turned on and the tilt angle sensor detects forward tilt or backward tilt continuing for a predetermined period of time when the aforementioned mast is tilting forward or tilting backward, the tilt angle is displayed. When the application of pressure in a direction to raise the fork is detected, continuing for a predetermined period of time, the weight of the loaded cargo calculated by the calculation unit is displayed, with priority given to display of the tilt angle.

Display device for cargo-handling vehicles

In a vehicle control unit for controlling a vehicle based on a detection signal obtained from a shift range detecting unit that detects a shift range selected by a shift operating unit, a vehicle speed detecting unit that detects a vehicle speed, and an engine rpm detecting unit that detects an engine rpm, when the detected vehicle speed is less than a reference vehicle speed, the shift range detecting unit detects that a shift switching operation is carried out from a neutral to a forward range or a reverse range, and the engine rpm detecting unit detects that the engine rpm is not less than a predetermined value until a time not less than a predetermined time is elapsed from when the shift switching operation is detected, a control for prohibiting a shift change of a transmission in accordance with the shift switching operation is carried out.

A vehicle control device has a control devicemounted on a vehicle including an accelerator opening detecting sensor, a vehicle speed sensor, and braking meanscapable of adjusting deceleration of the vehicle. The control device stores a plurality of deceleration tablesin which the deceleration is set according to a predetermined parameter. If the detected vehicle speed is equal to or less than a preset vehicle speed Vand the detected accelerator opening is equal to or less than a preset accelerator opening when a target deceleration is selected by the deceleration selecting meansand, the selection of the deceleration is validated, a deceleration tablecorresponding to the deceleration selected by the deceleration selecting means is read, and the braking means is actuated on the basis of braking parameters specified in the table, thereby executing deceleration control to provide the selected deceleration.

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Sagamihara, Japan

Naoki Ishikawa