Abstract: A door panel that permits formation of small ventilation holes therein while ensuring adequate rigidity is provided. The door panel includes an outer panel, an inner panel, and a perforated ridge-and-furrow plate. The outer panel has openings, and the inner panel has openings. The inner panel is formed by means of press molding so as to have an uneven surface with recessed portions and a raised portion, with the raised portion protruding away from the outer panel and the recessed portions recessed towards and fixed to the inner surface of the outer panel. The perforated ridge-and-furrow plate is attached to the reverse side of the inner panel. The perforated ridge-and-furrow plate is a punching plate that is already provided with numerous small, circular ventilation holes, or with ventilation holes arranged in a mesh or a honeycomb shape. The perforated ridge-and-furrow plate includes alternating furrow portions and ridge portions formed in the region that corresponds to the openings of the inner panel.

Abstract: A door panel that is capable of maintaining the adhering strength of the adhesive is provided. An outer panel and an inner panel are joined together by an adhesive. Adhesive retaining portions, each of which includes an adhesive retaining channel for retaining the adhesive, are provided in adhering portions of the inner panel. Each adhering portion includes vertically extending portions, and the adhesive retaining portions of the inner panel are formed in the shape of an extended raised portion and extend vertically in the respective vertically extending portions of the adhering portions, along ventilation openings, which are formed at locations corresponding to groups of ventilation holes of the outer panel. Each adhesive retaining portion is provided at the middle of each vertically extending portion of the adhering portions so as to be flanked by adhesion margins of identical width.

Abstract: An indicator control system for switching from a measurement value display mode to a camera display mode and vice versa in order to display a selected mode on a monitor section of an indicator and for generating an alarm from an alarm section. The measurement value display mode shows the measurement data of an object to be monitored such as a construction machine. The camera display mode being for a camera section that is mounted on the construction machine.

Abstract: The force feedback poppet valve includes a valve body having a main chamber, a first port, and a second port. The force feedback poppet valve further includes a main poppet disposed within the main chamber and movable between an open position and a closed position to control fluid flow between the first port and the second port. The main poppet forms a control chamber within the main chamber. The force feedback poppet valve further includes a first passage communicating the control chamber with the second port, a second passage communicating the control chamber with the first port, and a pilot valve having a pilot poppet for controlling fluid flow between the control chamber and the first port through the second passage. The force feedback poppet valve further includes a pressure compensator disposed within the main poppet, and fluidly connected to the second port via the first passage.

Abstract: An indicator control system with a camera section provided with a switch for switching from a measurement value display mode to a camera display mode and vice versa to display a selected mode on a monitor section of an indicator. The measurement value display mode shows the measurement data of an object to be monitored on a construction machine, and the camera display mode is for the camera section mounted on the construction machine.

Abstract: A work machine enabling a hybrid drive system to be directly driven by energy contained in a return fluid discharged from a hydraulic actuator. The work machine includes a hydraulic actuator control circuit and a swing control circuit. The hydraulic actuator control circuit serves to control hydraulic fluid supplied from pumps of a hybrid drive system to travel motors and work actuators. The swing control circuit serves to control a swing motor generator, which functions as an electric motor and, during braking of rotating motion of the upper structure, functions as a generator. The hydraulic actuator control circuit includes an energy recovery motor provided in a return passage, though which return fluid recovered from a work actuator flows. The energy recovery motor is adapted to be driven by return fluid and thereby drive a motor generator of the hybrid drive system.

Abstract: A swing control circuit is provided separately from a hydraulic actuator control circuit. The swing control circuit includes a swing pump motor connected to closed circuits of a swing motor through a solenoid valve that serves as a directional control valve. A swing motor generator is connected to the swing pump motor. The swing motor generator is connected to an electric power storage device of a hybrid type drive system. An exterior-connecting passage for feeding hydraulic fluid to hydraulic actuators of a lower structure and a work equipment is drawn from a pipeline between the swing pump motor and the solenoid valve. A connecting passage solenoid valve is disposed in the exterior-connecting passage. The invention enables hydraulic energy generated in the swing system to be directly fed to the outside of the swing system.

Abstract: A boom control circuit for controlling hydraulic fluid fed to a boom cylinder is provided separately and independently from a travel/stick/bucket control circuit, which serves to control hydraulic fluid fed to travel motors, a stick cylinder, and a bucket cylinder. The boom control circuit includes a boom pump, an energy recovery motor disposed in a return passage through which return fluid from the boom cylinder 8bmc passes, and a boom motor generator connected to the energy recovery motor. The aforementioned boom pump is connected through a clutch to the boom motor generator. The invention is capable of providing a work machine of which a boom control circuit is adapted to function independently so that the flow rate required by the boom control circuit can be easily ensured.

Abstract: A remote management system including a work machine side dynamic state data management device, and a management section side management device for causing a communication unit capable of data transmission and reception to and from a communication unit on the work machine side to receive dynamic state data transmitted from at least the work machine side and at the same time, causing a control section to run a Web site capable of providing data only to a user permitted to access and reflecting arbitrary data out of the received dynamic state data in the Web site.

Abstract: An information processor, a state judging unit, a diagnostic unit, an information processing method, a state judging method and a diagnosing method aim at precisely recognizing each operation carried out by an object that functions in a number of operation modes. For this purpose, a number of combinations of n parameter values, concerning each of the operation modes, that vary with operation are detected by sensors (1a-1d) during the operation of the object, and a Self-Organizing Map creating means (2) creates Self-Organizing Maps, which corresponds one to each of the operation modes and which serve as individual separation models, regarding detection data based on the detected combination of parameter values as learning data.