To dispense with the sprinkling by hands by providing the first nozzle at the flank of the rotary part of a work vehicle and the second nozzle at the tip of a hydraulic breaker, and sprinkling water over a crash point and a fall point, and preventing the scattering of dust.
The first spray nozzle 17 is provided at the flank of the rotary part adjacent to the control cab of a work vehicle equipped with a hydraulic breaker 1 which performs the excavation of a tunnel and the crash of a concrete structure, and the second spray nozzle 3 is provided at the tip of the hydraulic breaker 1, and these are coupled with a water pump 22 by high-pressure rubber hoses 55 and 56. The water pump 22 is driven by a hydraulic motor 32 driven by an engine 8, and the discharge pressure from the jet nozzles 3 and 17 is kept constant, and also it is so arranged that this can sprinkle water even in pause of a breaker, not to mention it during operation. The occurrence of dust at the crash point is prevented, and also the scattering of dust at the fall point is prevented. Hereby, the sprinkling of water to the head of the work site is made possible, and the safety is improved.
| WO/1991/001413 | ADJUSTABLE SWIVELLING JOINT FOR AN EXCAVATOR OR THE LIKE |
| JPS56115427 | HYDRAULIC CONTROLLER |
SAKANO HISASHI
FUJIMOTO SHIGERU
HITACHI CONSTRUCTION MACHINERY
YUNAITO LEASE KK
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