Hitachi Construction Machinery Co., Ltd.

Hitachi Construction Machinery

Kazuhiro Shibamori

Hidenobu Tsukada

Hiroyuki Adachi

Genroku Sugiyama

Hideki Komatsu

Koichi Shibata

Keiichiro Nakamura

Kazunori Nakamura

Yuuki Gotou

Tadatoshi Shimamura

Hiroshi Watanabe

Yoichi Kowatari

Shohei Kamiya

Kouta Fujieda

Kouji Ishikawa

Toichi Hirata

Takashi Saegusa

Yutaka Watanabe

Kensuke Sato

Tsuyoshi Sakyo

Toshinori Kimura

Masanori Ezawa

Itsuo Kondo

Yuji Nagashima

Yuuki Nagaoka

Makoto Saen

A work machine includes a body, a work implement attached to the body, and a controller that executes a transmission process of transmitting data to an external apparatus installed outside the body. The controller measures a speed of communication with the external apparatus, places a functional restriction on the transmission process when the speed of communication is lower than a predetermined required speed, reinforces the functional restriction on the transmission process as the speed of communication lowers, and reinforces the functional restriction on the transmission process when a state of the work machine is an operation state, as compared to a case where the state of the work machine is not the operation state.

Work machine

A safety device for a construction machine includes a status information acquisition section that acquires status information pertaining to the status of the construction machine, a seat belt detection section that detects whether an operator is wearing a seat belt, and a control section that controls a warning section so that a warning is given on the basis of the status information when the operator is not wearing the seat belt, in which the status information includes information pertaining to the operation position of a gate lock lever that is manipulated to a lock position in which instructions from operating levers of the construction machine are disabled and a lock release position in which instructions from the operating levers are enabled, and the control section controls the warning section so that a warning is given when the gate lock lever operation position is at the lock release position.

Safety device for a construction machine

A remote management system for at least one working machine manages an upper limit of an engine rpm. A hydraulic excavator includes a controller and an instruction switch for selectively instructing three kinds of work modes. The controller includes a target rpm storage unit, a target rpm computer for selecting one of stored upper limits of the target rpm according to an instruction by an instruction switch and computing a target rpm in a range smaller than the selected upper limit, and a communication unit. A server selects a work mode, according to an instruction by an input device, and instructs the selected work mode to the controller. When the work mode is instructed from the server, the target rpm computer computes a target rpm based on the instructed work mode.

Remote management system for work machinery

A display system for a working machine displays warning information while also displaying a high-quality camera image. The display redisplays a reduced camera image at a reduction scale of 60% according to an abnormality information signal. An open areaoutside the area displaying the camera image. The display control device displays a warning icon (large size), corresponding to abnormality information regarding a filter of a DPF device, in the open area. The operator recognizes the warning and immediately stops the operation, moves to a place where the filter regeneration is possible while checking the safety of the surroundings by viewing the camera image, and then carries out the filter regeneration. After finishing, the operator confirms that the warning icon has disappeared, moves to the site of the operation while checking the safety of the surroundings by viewing the camera image (for normal times), and then restarts the operation.

Display system for working machine

A display system for a working machine displays basic information at all times and, in case of an abnormality, displays the details of the warning in addition to the basic information to enable an operator to reliably recognize details of the warning. For example, a first warning display function, upon receiving an abnormality information signal relating to a charge warning, displays an appropriate warning icon in a warning icon display region. A simplified basic-information display function, then displays simplified basic-information images and a second warning display function displays, in a free area of the display, a second warning message inclusive of a 'Charge warning' message as display details of the warning icon, and of character information relating to a simplified remedial action. The operator can then reliably recognize the 'Charge warning' and understand its details as well, by viewing the second warning message in addition to the warning icon.

In a server, a standard setting sectionestablishes a standard amount of deposits and a standard amount of money of a maintenance charge in advance; a first calculating sectioncalculates the maintenance charge by multiplying the standard amount of money by a ratio of a deposition level at returning to a standard deposition level; a memory sectionstores in memory an engine operating time, the number of regeneration sequences performed, and a reduction coefficient table; a second calculating sectionestablishes a reduction coefficient based on the reduction coefficient table and reduces the maintenance charge after reduction by multiplying the maintenance charge calculated by the first calculating sectionby the reduction coefficient; and a third calculating sectioncalculates an amount of refund by subtracting the value of the maintenance charge from the value of a maintenance guarantee.

Management system and method for exhaust purification apparatus

An exhaust gas treatment filter removes particulate matter from exhaust gas of a diesel engine. The particulate matter which accumulates on the filter is removed by a manual regeneration system that can simply be controlled. After a manual regeneration switchis shifted to an ON-position, a load control sectionkeeps at least one of the revolution speed N of an engine, the displacement volume q and discharge pressure P of a hydraulic pressure pumpat a corresponding first target value (N, q, or P) or second target value (N, q, or P) depending on a temperature of the cooling water in relation to a flame-out prevention temperature T. A regeneration control sectionstarts the compulsory regeneration after the manual regeneration switch has been shifted to the ON-position and when the cooling water temperature is equal to or higher than T

Working machine

Disclosed is a working machine capable of preventing damage to a filter due to excessive accumulation of particulate matter (PM), even under a situation that requires, prior to compulsory regeneration of the filter, moving the machine to a place in which to perform the regeneration work. The working machine that includes an exhaust treatment devicehaving a filterto trap the PM, a regeneration control sectionfor compulsorily regenerating the filter, and a regeneration instruction devicefor instructing the regeneration control sectionto start the compulsory regeneration. Further, when a deposition quantity estimating element determines that an actual PM deposition quantity has reached a deposition alarm level, an alarm devicenotifies an operator that the time has come to start the movement of the working machine to the place of regeneration.

A display device for a construction machine has a display switching means, output control means, operation detecting means, and display prohibiting means. The display switching means switches information displayed on a monitor placed in an operation cabin, where the switching is made to prevent display of unnecessary information on the monitor while the construction machine is performing work. The output control means selects display information recorded in information recording means and outputs the selected information to the monitor. The operation detecting means detects whether or not the construction machine is in a working state. When the operation detecting means detects that the construction machine is in the working state, display switching operation of the monitor is performed by the display switching means, and the display prohibiting means prohibits the display of specific information.

Monitor display 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

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 monitoring display system for use within a cab of an automotive vehicular construction machine to display on a monitor screen picture images of a dead angle monitor camera as a through-view in the back ground of superimposed picture images of instrumentation data indicating readings of various instruments on the machine.

Monitoring display device for use on construction 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

An information transmitting device to supply operation data of a machine as needed and without unnecessary data. The information transmitting device includes information control device, remote base station, transmission means, e.g. communication satellite, and selected data outputting means for selecting and transmitting predetermined operation data from operation data collected. Information control device includes operation data collecting unitand communication control unitwhich includes transmitting and receiving parts. Selected data outputting means includes operation data selecting device(external operating device) and, in information control device: identifier designating unitfor designating an identifier for selected operation data, identifier memory unit, and transmission data preparing unitfor reading operation data, which correspond to an identifier designated by identifier designating unit, from operation data collecting unit, and preparing operation data for transmission.

Information transmission device for 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.

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Ibaraki, Japan

Kazuhiro Shibamori