Hitachi Construction Machinery Co., Ltd.

Hitachi Construction Machinery

Koichi Shibata

Hiroyuki Adachi

Genroku Sugiyama

Hiroshi Watanabe

Toichi Hirata

Hideki Komatsu

Hideo Karasawa

Kazuhiro Shibamori

Osamu Tomikawa

Kiyoshi Ono

Hiroshi Onoue

Taiki Aizawa

Yuichiro Morita

Hiroshi Ogura

Tadatoshi Shimamura

Manabu Sugiura

Toshinori Kimura

Shuichi Miura

Koji Mitsuya

Yoshiaki Saito

Atsushi Sato

Yasushi Ochiai

Yoshiyuki Umeno

Itsuo Kondo

Yuji Nagashima

A maintenance device for a construction machine includes: an abnormality detection means for detecting abnormality of an apparatus installed on the construction machine; an abnormality information output means for outputting abnormality information about the apparatus detected by the abnormality detection means; and a maintenance mode setting means for setting a maintenance mode for performing a maintenance work of the apparatus, wherein the abnormality information output means for eliminating negation or output of the information, if any abnormality of the apparatus is detected in a state in which the maintenance mode is set by the maintenance mode setting means.

Maintenance device for construction machine

An abnormality control device for a construction machine includes: an abnormality detection means for detecting abnormality of an apparatus installed on the construction machine; an abnormality information output means for outputting abnormality information about the apparatus detected by the abnormality detection means in an ordinary mode, and negating or avoiding outputting the abnormality information about the apparatus detected by the abnormality detection means in a maintenance mode; and a mode switch means for determining a content of maintenance work and switching a work mode between an ordinary mode and a work mode according to the content of work or a situation.

Abnormality information control device for construction machine

A hydraulic excavator periodically measures its current location at predetermined time intervals by the GPS device in an inoperative state where its engine key is in the off position and sends the current location data and time data to a management server by a main controller and communicator. The management server receives the periodically sent location data at its communicator and successively stores it in its memory. The current location data and the measurement time data to provide a location confirmation service by a location information provider. Changes in location can be confirmed on a map, the movement of the hydraulic excavator can be tracked, and assistance can be given for confirmation of location and prevention of theft.

Location confirmation method and location display system of construction machine and such construction machine

Assessment information needed to calculate a used vehicle assessment value of a hydraulic excavatoris input to a portable telephoneand is then transmitted from the portable telephone. The transmitted assessment information is received at a manufacturer's base stationat a remote location. The used vehicle assessment value of the hydraulic excavatoris calculated based upon the received assessment information, and history information and operation information on the hydraulic excavatorread out from an operation information databaseand a history databasein correspondence to an ID number assigned to the hydraulic excavator which is included in the assessment information.

Construction machine management apparatus and construction machines management system

An antitheft system can be provided by constructing such that, when a stop signal has been inputted from an engine, a main controlleroutputs, until a first predetermined time Ts elapses, a turn-on signal to switchesto perform a similar antitheft processing as in an operation of the engineand after an elapse of the first predetermined time Ts, instructs the switchto repeat a turn-on and turn-off at predetermined time intervals &#x394;t, and, whenever the switchis brought into a turned-on position, detects a position at that time by a position detecting controllerand compares the position with a position at the time of an engine stop to determine whether or not a theft has taken place. Owing to this construction, it is no longer necessary to always feed power to the position detecting controllerduring the stop of the engine, thereby making it possible to cut down the feeding of as much power to the controlleras a time elapsed during which the switchis kept off. The antitheft system can, therefore, minimize the power consumption of a control system during the engine stop.

Antitheft device

A maintenance system of a hydraulic excavator () is provided with a maintenance monitoring device (), a maintenance management server () for managing trouble information and operating information for each working machine, a model information server (), and a service personnel mobile terminal () connected to one another through the Internet (). When trouble occurs in the hydraulic excavator, the maintenance system () transmits trouble information to the maintenance management server (), and the maintenance management server () transmits information on occurrence of trouble to the mobile terminal () and displays it on a display unit. This system manages the maintenance manuals and other data for each model in a model information database separate from the maintenance database and correlates the two databases based on the model data.

Work machine maintenance system

A working machine maintenance system having a plurality of working machines. A center server is provided that manages maintenance on the plurality of working machines by engaging in data exchange through bidirectional communication with each of the plurality of working machines via a communication line. The working machines each include an operation data storage device, an operation device operated to enter a maintenance work completion, a data transmission device, a data reception device, and a display device at which the maintenance information is displayed. The center server includes a data reception device that receives the operation data, the maintenance work completion data, and the maintenance data that have been transmitted, an operation database in which the operation data are stored, a maintenance database, a calculation device that calculates maintenance timing. and a data transmission device that transmits data related to the maintenance information.

Working machine, failure diagnosis system for work machine and maintenance system for work machines

Provided is a communication system for working machines, which makes it possible to transmit desired messages from sites, where the working machines are arranged, to their corresponding work administration centers at timings as needed. When a mail switcharranged on a working machineis operated to send information to a server, a terminal user-company identification unitidentifies, on the basis of a terminal information database, a user to which the information so received is to be sent. A user-company-dependent mail selection unitselects customer informationon the user from a customer database. At a transmission mail creation unit, a corresponding new messageis created. The mail is then transmitted from a mail output unit. In this manner, a desired message can be sent from each working machineat a remote location to the corresponding user at a timing as needed.

Communication system for working machines

Construction machine management, permitting operation of a construction machine only under specified conditions and inhibiting its operation in case it is in a state incongruent with preset working conditions. Working conditions for each construction machine are set up by a working conditions setup means, including a geographically divided working area and a working time zone in which a construction machine is allowed to operate in a specified working area. Setup working conditions are stored in a memory means. At the time of starting a construction machine, the status of the construction machine is checked for by a status checkup means which is adapted to check for current position of the construction machine and current time against the working area and working time zone of the setup working conditions. In case a construction machine is found to be in a state incongruent with both of the working area and the working time zone of the preset working conditions, the management inhibits operation of that construction machine.

System and method for managing construction machinery

The present invention is applied to a system comprised of large number of hydraulic excavatorsdeployed at construction sites and a base stationEach hydraulic excavatoris provided with a storage unit (memory), a control unit (CPU) for executing the work operation and receiving as input a quantitative machine status relating to the work operation, and a communications deviceThe base stationis provided with a communications devicea management serverfor identifying the serial number of the hydraulic excavatorand transferring information, and a databasefor storing various information. The control unit of the hydraulic excavatorand the management serverof the base stationtransfer information. With this system configuration, the control unit measures the duration during which the quantitative machine status satisfies a predetermined condition and stores it in the storage unit and transmits the measurement data of the duration to the management serverof the base stationconditional on the power input key being in the off position, while the management serverreceives the measurement data of the duration and calculates the cumulative operating time. Further, the quantitative machine status and various event data stored in the storage unit of the hydraulic excavatorare sent to the base stationwhile the management server of the base stationstores the quantitative machine status and various event data in the databaseby a predetermined format.

Method of detection of actual operating time of machinery deployed at construction sites, data collection and management system, and base station

A construction machine comprises a location detector for detecting location information for the construction machine, a determination device for determining whether or not location information is to be transmitted and outputting a transmission signal if it is determined that information is to be transmitted, and a transmitter for transmitting the detected location information to a base station in response to the transmission signal.

Construction machine management system, and construction machine

A security system of a construction machine of the present invention has a construction machine, a base station and a communication device. The construction machine comprises a data sending and receiving portion for sending first information, a storage portion for storing received information, and a control portion for controlling an operation of the construction machine. The base station receives the first information from the data sending and receiving portion of the construction machine and sends second information to the construction machine and manages the construction machine. It is configured so that the communication device is connected to the base station through a communication network and can send third information to the construction machine through the base station.

Security system of construction machine

A security system for a construction machine including a construction machine equipped with a body controller for storing a first password, management apparatus arranged in a location apart from the construction machine and a portable communications unit for storing a second password provided communicably with the management apparatus and the body controller. The portable communications unit, receiving the first password from the management apparatus, replaces the second password with the first password. The body controller determines whether the second password output from the portable communications unit coincides with the first password. In case these passwords coincide with each other, an engine drive signal is output. Otherwise the engine is kept inoperable. This prevents possible theft of a construction machine.

Security system of construction machinery

A method and system for managing a construction machine whereby working time for each of different parts of a hydraulic excavator is measured. Measured data is stored in a memory of a controller and then transferred to a base station computer via satellite communication to be stored in a database. At each repair/replacement of a part in each hydraulic excavator, the base station computer calculates, based on the operation data, a replacement time interval of the part on the basis of the working time per section to which the part belongs, and then stores and accumulates it. The base station computer also reads the stored data for each hydraulic excavator, determines, for each part, a replacement rate of the part having a substantially equal replacement time interval, and calculates a target replacement time interval of the part in accordance with the replacement time interval corresponding to a maximum replacement rate.

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Ibaraki, Japan

Koichi Shibata