Abstract: A harvester apparatus (100) equipped in a work vehicle and capable of at least cutting down, pruning, and cross-cutting wood, the harvester apparatus being configured to include a gripping claw (116) that can hold the wood by opening and closing in the thickness direction of the wood, a chain saw (120) capable of cutting the wood held with the gripping claw (116), a pruner (110) for pruning the wood arranged at a different position in the lengthwise direction of the gripped wood relative to the gripping claw (116), a slide frame (105) that can change the lengthwise distance between the pruner (110) and the gripping claw (116), and a sensor (130) for detecting the slide amount of the slide frame (105).

Abstract: It is realized to efficiently energize a lifting magnet device, and reduce the devices used in an energization system of the lifting magnet device in size, energy consumption, and noise as well. Other than a lifting magnet device 8, the handling machine includes an engine 1 and an electric generator 5, which form a power source; a storage battery 20 for storing electric energy from the power source; and a generator motor (or a drive source for a driven body) 18 for driving an upper rotary body in which regenerative electric energy can be produced. The power source and the storage battery 20 are connected to be capable of supplying electric energy to the lifting magnet device 8. The generator motor 18 for driving the upper rotary body is connected to be capable of supplying its own regenerative electric energy to the storage battery 20.

Abstract: There is provided construction machinery for switchably controlling rotational speed between a normal and an energy saving mode. Change in workload is detected by means except for change in pressure of a main circuit. It is more convenient to use the machinery in the energy saving mode, increasing opportunities for use in the energy saving mode to suppress fuel consumption and noise.