A work state identifying unit identifies work states of a work machine. A parameter identifying unit identifies a parameter related to a work amount per unit time of the work machine or a parameter related to a speed of the work machine for each of the identified work states on the basis of a time series of position data, azimuth data, or speed data of the work machine.

A tailgate assembly is provided for a cargo bed having a bottom wall and a front, left and right side walls. An opening is defined between the left and right side walls, and the bottom wall. The tailgate assembly includes a first panel and a second panel. The first panel is pivotally connected to the bottom wall. The first panel is pivotable between a cargo-retaining position and an unfolded position with respect to the bottom wall. In the cargo-retaining position, the first panel closes the opening. The second panel is pivotally connected to the first panel. The second panel is pivotable between a folded position and a ramp position. In the folded position, the first panel and the second panel are substantially parallel to one another and in the ramp position the first and second panels extend from one another at an angle greater than ninety degrees.

A tailgate assembly is provided for a cargo bed having a bottom wall and a front, left and right side walls. An opening is defined between the left and right side walls, and the bottom wall. The tailgate assembly includes a first panel and a second panel. The first panel is pivotally connected to the bottom wall. The first panel is pivotable between a cargo-retaining position and an unfolded position with respect to the bottom wall. In the cargo-retaining position, the first panel closes the opening. The second panel is pivotally connected to the first panel. The second panel is pivotable between a folded position and a ramp position. In the folded position, the first panel and the second panel are substantially parallel to one another and in the ramp position the first and second panels extend from one another at an angle greater than ninety degrees.

A method for transporting a plurality of articles with a transportation container that can be carried in a transport container of one of a plurality of robots. The plurality of articles is placed in the transportation container. The transportation container is placed in a pickup location at a first location. A robot is navigated to the first location and the transportation container is autonomously moved from the pickup location to the transport container of the robot. The robot is navigated over an outdoor transportation network to a second location and the transportation container is autonomously moved from the transport container to a recipient location at the second location.

A method for transporting a plurality of articles with a transportation container that can be carried in a transport container of one of a plurality of robots. The plurality of articles is placed in the transportation container. The transportation container is placed in a pickup location at a first location. A robot is navigated to the first location and the transportation container is autonomously moved from the pickup location to the transport container of the robot. The robot is navigated over an outdoor transportation network to a second location and the transportation container is autonomously moved from the transport container to a recipient location at the second location.

The present disclosure relates to a method for controlling a lifting and lowering sequence of a load carrying body (20) of a vehicle (1) and to a vehicle comprising a chassis structure (10) and the load carrying body (20) pivotally mounted on the chassis structure (10) with respect to a pivot axis being substantially parallel to either a pitch axis (Y) or a roll axis (X) of the vehicle, wherein the vehicle (1) comprises sensing means (11) provided on the chassis structure for measuring roll angle and pitch angle of the chassis structure and sensing means (21) provided on the load carrying body for measuring roll angle and pitch angle of the load carrying body. The method comprises the steps of: —(S1) measuring roll angle and pitch angle of the chassis structure and of the load carrying body during the lifting and lowering sequence, by means of the sensing means, —(S2) determining absolute roll angle and pitch angle of the chassis structure and the load carrying body, respectively, with respect to a reference, —(S3) determining a relative roll angle between the chassis structure and the load carrying body by comparing the measured roll angles of the chassis structure and the load carrying body when the load carrying body is pivotally mounted with respect to the pivot axis being substantially parallel to the pitch axis, or determining a relative pitch angle between the chassis structure and the load carrying body by comparing the measured pitch angles of the chassis structure and the load carrying body when the load carrying body is pivotally mounted with respect to the pivot axis being substantially parallel to the roll axis, —(S4) controlling the lifting and lowering sequence at least based on the determined absolute and relative angles.

Provided is a dump truck capable of performing an actuation test of an emergency brake system at an appropriate timing. The dump truck comprises: front wheel and rear wheel emergency brake systems, each system including an accumulator that accumulates hydraulic oil supplied from a hydraulic pump, a brake device that is actuated by the hydraulic oil supplied from the accumulator, and a solenoid valve that opens and closes a flow path of the hydraulic oil extending from the accumulator to the brake device; and a controller configured to execute front test processing and rear test processing alternately (step S16/step S18) in the case of determining that the dump truck is stopped (step S11: Yes), a vessel is in a fallen position (step S12: YES), and a loading operation onto the vessel is completed (step S15: Yes/step S17: Yes).

Disclosed is a work vehicle having a load carrier deck provided at a rear portion of a vehicle body to be vertically pivotable between an elevated discharging posture and a lowered load carrying posture. An engine section is provided under the load carrier deck. The engine section includes an engine, an exhaust muffler for the engine, and a muffler heat insulating cover for covering an outer circumference of the exhaust muffler. The muffler heat insulating cover is supported by a vehicle body frame via an anti-vibration member.

Disclosed is a work vehicle having a load carrier deck provided at a rear portion of a vehicle body to be vertically pivotable between an elevated discharging posture and a lowered load carrying posture. An engine section is provided under the load carrier deck. The engine section includes an engine, an exhaust muffler for the engine, and a muffler heat insulating cover for covering an outer circumference of the exhaust muffler. The muffler heat insulating cover is supported by a vehicle body frame via an anti-vibration member.

A trailer having a main deck portion having a main deck surface, an upper deck portion having an upper deck surface, a connecting frame assembly, a plurality of rollers elements, and a tailgate. The connecting frame assembly can couple together the main deck portion and the upper deck portion. The roller elements can be arranged in one or more rows and can be mounted in the main deck surface or the upper deck surface so as to cover a substantial portion of the main deck surface or the upper deck surface. The tailgate can be coupled to the main deck portion and can be movable between a closed position and an open position.