Kabushiki Kaisha Kobe Seiko Sho

Kobelco Construction Machinery Co., Ltd.

Norihiko Hayashi

Tomohiko Asakage

Hideki Kinugawa

Hideaki Yoshimatsu

Yukio Koizumi

Yoshiyasu Umezu

Yoshiki Kamon

Yoshimi Saotome

Kiyotsuna Kuchiki

Hisashi Kadowaki

Tsuyoshi Katada

Hitoshi Hidaka

After a remote control valve has been brought into a non-working state, a stop signal is to be sent from an engine controller in a controller to a governor controller in an engine to stop the engine automatically, under the condition that an illuminating lamp is turned off, after a preset allowance time has passed and when a gate lever provided at a gateway for an operator is opened (the operator gets off the machine). Further, before the engine is stopped, the operator is to be notified of the coming engine stop, and when the engine is stopped, a power supply is to be cut off automatically.

Construction machinery

A control device for a construction machine according to the present invention is configured so that in the construction machine provided with an automatic stop function which automatically stops an engine by an engine controller upon a predetermined automatic stop condition being met, and a hydraulic lock function which sets a hydraulic actuator locked in an inactive state by a hydraulic lock controller, there is provided a restart switch, where after an automatic stop of the engine, when the restart switch is operated, a restart command is transmitted to the engine controller via a route independently of that of an engine switch and independently of a hydraulic unlock condition, and the engine is restarted.

Control device for construction machine

An anti-theft system for construction machines, comprising a memory which stores, as machine-side identification information, first identification information allocated construction machine by construction machine and second identification information allocated in common to plural construction machines, a first collating medium having the same identification information as the first identification information, a second collating medium having the same identification information as the second identification information, a collator which collates the identification information of the first or the second collating medium with the machine-side identification information, and an operation controller which cancels the inhibit of operation of the construction machine concerned when there is obtained a coincident collation result by the collator. With this anti-theft system, an owner of construction machines can manage the construction machines by only one type of a collating medium while preventing theft.

Anti-theft system for construction machines and method for managing construction machines

A safety apparatus which can set an appropriate rated load curve which can be grasped readily by an operator and takes a difference between horizontal extension amounts of outrigger jacks into consideration and can facilitate calculation of a load factor. Entire circumference load calculating means calculates a first rated load regarding a forward and backward direction and calculates a second rated load based on extended conditions of the front and rear outrigger jacks, and then calculates inflection angles of a rated load curve based on the rated loads and the extended conditions of the outrigger jacks, whereafter it sets, from the inflection angles, a final rated load curve which continues over the entire circumference. Further, load factor calculating means calculates a load factor making use of the rated load calculated by the entire circumference load calculating means, and a safety operation is performed in accordance with the load factor.

Safety apparatus for construction equipment

A safety device for a crane which can make a safety operation precisely taking a relationship between a swinging condition of a boom and a limit working region into consideration. In the device, a working radius and a swinging angle of the boom and projection amounts of projectable support members of the crane are detected, and a limit working region of the boom is set in accordance with a weight of a suspended cargo and the projection amounts. A remaining angle over which the boom can be swung until the set limit working region is exceeded is calculated, and also a braking angular acceleration at which swinging movement of the boom is braked and stopped without leaving a shake of the suspended cargo is calculated. Further, a swinging angle of the boom required to brake and stop the swinging movement of the boom at the braking angular acceleration is calculated, and the thus calculated required angle and the remaining angle are compared with each other. Thus, a safety operation is performed before the remaining angle exceeds the required angle. Meanwhile, the set limit working region and a current working radius and swinging angle of the boom are indicated on the same screen of a display unit.

Safety device for crane

According to the displacement suppressing mechanism for a travelling crane of the present invention, when a mode selection switch selects an operation mode and a detected value by a boom position detecting means is smaller than a lower limit value of an appropriate travelling range, a change-over valve for replenishment capable of changing over the position of an auxiliary pressure oil source selectively to a communicating position for communication of the auxiliary pressure oil source with a first oil chamber of a boom raising and lowering hydraulic cylinder and a communication cutting-off position is shifted to the communicating position by a control means to supply a predetermined amount of pressure oil to the first oil chamber of the hydraulic cylinder.

Mechanism for suppressing displacement of travelling crane

A steering controlling device for a wheel crane wherein a locking operation in a special mode is permitted upon changing over from the special mode to a normal mode and locking and a mode changing over operation can be prevented during normal running of the crane. The device includes front and rear wheel steering cylinders, a mode changing over valve for controlling the cylinders to change over the steering mode, a mode selecting switch, a locking device for locking the rear wheels in the normal mode, a locking switch, a running detecting sensor for detecting a running condition of the crane, a locking change-over controller means responsive to signals from the locking switch and the running detecting sensor for developing a locking or unlocking instruction signal to the locking device when the crane is not in a normal running condition, and a mode change-over controller means responsive to a signal from the running detecting means for forwarding a steering mode selected by the mode selecting switch to the mode changing over valve when the crane is not in a normal running condition.

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Kakogawa, Japan

Norihiko Hayashi