| 摘要 |
<p>PURPOSE:To simplify an operation of a back-hoe by providing a sensor to detect an oscillating angle of the back-hoe and providing a housing control means to be automatically operated to a housing posture located within the limits of a swivel from a plane view and its starting operational means. CONSTITUTION:A boom angle sensor S1 to detect an oscillating angle against a swivel of a boom, an off-set sensor S2 to detect a transverse moving stroke, an arm angle sensor S3 to detect an oscillating angle of an arm and a bucket angle sensor S4 to detect an oscillating angle of a bucket are respectively provided. From detection result of each sensor, a position against the swivel of the back-hoe device is detected and, at the same time, a back-hoe device housing control means 20 to be automatically operated is provided to a housing posture located within the limits of the swivel from a plane view. In addition, an operational means 24a to start the control means 20 is provided. According to the constitution, automation and simplification of an operation can be achieved.</p> |
