Agricultural machine

1. An agricultural machine comprising:

a vehicle body including a front wheel and a rear wheel;

an obstacle detector to detect an obstacle;

a position changer to change a position of the obstacle detector between a detection position to detect an obstacle and an evacuation position to evacuate toward the vehicle body from the detection position; and

a controller to control automatic traveling of the vehicle body; wherein

the position changer is configured to switch between a detection posture to locate the obstacle detector in the detection position and an evacuation posture to locate the obstacle detector in the evacuation position;

the position changer includes a posture detector to detect whether the position changer is in the detection posture or in the evacuation posture;

the controller receives detection information from the posture detector indicating whether the obstacle detector is in the detection position or in the evacuation position, and controls the automatic traveling of the vehicle body based on the detection information;

the position changer includes a first support arm fixed to the vehicle body, and a second support arm rotatably supported by the first support arm;

the obstacle detector includes a first obstacle detector provided on a second end of the second support arm, and a second obstacle detector provided on an intermediate portion of the second support arm between the second end and a first end of the second arm; and

the second support arm is rotatable with respect to the first support arm between a first position to locate the first obstacle detector and the second obstacle detector in the detection position to detect an obstacle, and a second position to locate the first obstacle detector and the second obstacle detector in the evacuation position to evacuate the first obstacle detector and the second obstacle detector toward the vehicle body from the detection position.

2. The agricultural machine according to claim 1 , wherein

the first support arm extends outwardly from the vehicle body in a width direction of the vehicle body;

the posture detector detects the detection posture of the position changer when the second support arm is horizontally held by the first support arm to locate the first obstacle detector and the second obstacle detector in the detection position outward in the width direction of the vehicle body from the first support arm; and

the posture detector detects the evacuation posture of the position changer when the second support arm is vertically held by the first support arm to locate the first obstacle detector and the second obstacle detector in the evacuation position inward in the width direction of the vehicle body from the detection position.

3. The agricultural machine according to claim 1 , wherein

the controller controls the automatic traveling based on a detection result of the obstacle detected by the first obstacle detector and the second obstacle detector the obstacle detector.

4. The agricultural machine according to claim 1 , further comprising: a display on which the controller displays the detection information from the posture detector.

5. The agricultural machine according to claim 1 , wherein the controller determines, based on the detection information from the posture detector, to perform the automatic traveling when the first obstacle detector and the second obstacle detector are in the detection position, and not to perform the automatic traveling when the first obstacle detector and the second obstacle detector are in the evacuation position.

6. The agricultural machine according to claim 1 , wherein the posture detector includes:

a first posture detector to detect whether the position changer is in the detection posture; and a second posture detector to detect whether the position changer is in the evacuation posture.

7. The agricultural machine according to claim 1 , wherein one of the first obstacle detector and the second obstacle detector includes a laser scanner, and the other of the first obstacle detector and the second obstacle detector includes a sonar.

8. An agricultural machine comprising:

a vehicle body including a front wheel and a rear wheel;

a first support arm fixed to the vehicle body;

a second support arm rotatably supported at a first end thereof by the first support arm;

a first obstacle detector provided on a second end of the second support arm; and

a second obstacle detector provided on an intermediate portion of the second support arm between the first end and the second end; wherein

the second support arm is rotatable with respect to the first support arm between a first position to locate the first obstacle detector and the second obstacle detector in a detection position to detect an obstacle, and a second position to locate the first obstacle detector and the second obstacle detector in an evacuation position to evacuate the first obstacle detector and the second obstacle detector toward the vehicle body from the detection position.

9. The agricultural machine according to claim 8 , wherein one of the first obstacle detector and the second obstacle detector includes a laser scanner, and the other of the first obstacle detector and the second obstacle detector includes a sonar.