| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that, though rice transplanters, etc., are known, there are some cases in which detected values of rates of acceleration or angular velocities do not remarkably appear when a front wheel bounds on local irregularities, as a following rear wheel is not affected by the irregularities in a vehicle having the difference in size between the front and rear wheels such as tractors or the likes. SOLUTION: In a working vehicle such as a tractor and the like installed with a pair of lateral front wheels 1, a pair of lateral rear wheels having larger size than that of the front wheels and a working space liftably connected to the rear part of the vehicle body, equipped with a rear cover angle sensor 4 for detecting working height in the working space, while an angular sensor 5 on the vehicle body side and a device for controlling lifting of implement depending on the detected values of the both sensor 4 and 5, the sensor 5 for detecting vertical accelerations of the vehicle body or angular velocities is installed on the grounding position of the front wheel, e.g. on the enging mounting frame 11 above a front accelerator case 6.
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