Komatsu Corporation

Keiji Kimura

Taku Murakami

Kuniaki Nakada

Masaru Uenoyama

Akifumi Hoshino

Kiyoshi Fukasawa

A noise reduction structure for a cab of a working vehicle, by which a high degree of noise reduction effectiveness can be surely obtained, is provided. For this purpose, the noise reduction structure has a configuration in which a sound-insulating chamber (A; B; C) adjacent to a cab ( ) is provided at a position of at least one of the following: under a floor ( ) of the cab ( ), behind a rear wall of the cab ( ), and at a side of a side wall of the cab ( ).

Noise reduction structure for cab of working vehicle

A cutting device for performing a cutting operation, which can reduce wasteful cutting, can easily perform an accurate and neat cutting, and can have a long service life. The cutting device includes a guide supporting member, mounted to a distal end of a working machine on a self-propelled working vehicle in such a manner as to be freely swingable; a guide element, horizontally supported by the guide supporting member; a cutter, mounted to the guide element; a first movement device, for moving the cutter with respect to the guide element; and a second movement device, for moving the cutter in a direction along the guide element. A vibration preventing system can be included. Since the cutter vertically moves at a time of entering, a cutting can be efficiently performed with no wasteful cutting; and since vibration is reduced, the service life is extended.

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Yokohama, Japan

Keiji Kimura