Harvesting machine

A combine comprising:

• a travelling machine body;
• an orientation changing mechanism that changes an orientation of the travelling machine body;
• a grain tank that is mounted on the travelling machine body and stores grain that has been transported from a threshing apparatus;
• an unloader apparatus that discharges grain that has been stored in the grain tank to an outside from a bottom part of the grain tank;
• a load cell that measures a weight of the grain tank;
• a yield measurement part that measures a yield of grain that has been stored in the grain tank, based on a result of measurement performed by the load cell;
• a zero point adjustment part that performs zero point adjustment processing for the yield measurement part;
• and
• a horizontal orientation control part that controls the orientation changing mechanism upon zero point adjustment processing being started by the zero point adjustment part, so as to bring the travelling machine body into a horizontal orientation.

A combine comprising:

• a grain tank that stores grain that has been transported from a threshing apparatus;
• a grain discharging apparatus that discharges grain that has been stored in the grain tank to an outside from a bottom part of the grain tank;
• a tube-shaped member that is provided inside the grain tank, and forms a grain path that has:
• an inlet port that is an upper port for taking in some of the grain that has been transported from the threshing apparatus;
• and a discharge port that is a lower port for discharging the grain that has been taken in from the inlet port to the grain tank;
• a temporary storage part that is located halfway of the grain path;
• a storage shutter that is provided for the temporary storage part, and that is movable between:
• a closed position for storing, at which the storage shutter takes on a horizontal orientation in order to store grain that has been taken in from the inlet port of the temporary storage part;
• and an open position for discharging, at which the storage shutter takes on a downward orientation in order to discharge the stored grain from the temporary storage part;
• a quality measurement part that detects quality of grain that has been stored in the temporary storage part;
• a grain level detector that is provided in the grain path and detects that a below-shutter distance has reached a predetermined value, the below-shutter distance being a distance between a lower end of the storage shutter in the downward orientation and an upper surface of the grain that has been stored in the grain tank;
• and
• a shutter control part that controls a position changing operation of the storage shutter, and stops the position changing operation of the storage shutter based on a detection signal from the grain level detector.

A combine comprising:

• a grain tank that stores grain that has been transported from a threshing apparatus;
• a grain discharging apparatus that discharges grain that has been stored in the grain tank to an outside from a bottom part of the grain tank;
• a grain path that is provided inside the grain tank, and has:
• an inlet port that is an upper port for taking in some of the grain that has been transported from the threshing apparatus;
• and a discharge port that is a lower port for discharging the grain that has been taken in from the inlet port to the grain tank;
• a temporary storage part that is located halfway of the grain path;
• a storage shutter that is provided for the temporary storage part, and that is movable between:
• a closed position for storing, at which the storage shutter stores the grain that has been taken in from the inlet port of the temporary storage part;
• and an open position for discharging, at which the storage shutter discharges the stored grain from the temporary storage part;
• a storage amount detector that outputs a storage complete signal upon an amount of grain that has been stored in the temporary storage part reaching a predetermined amount;
• a quality measurement part that detects quality of grain that has been stored in the temporary storage part;
• a shutter control part that controls a position changing operation of the storage shutter;
• a yield measuring device that measures a yield of grain that is stored in the grain tank;
• and
• a failure determination part that determines that a failure has occurred in the storage amount detector, based on a fact that the storage amount detector has not outputted the storage complete signal, despite the amount of grain that has been stored in the temporary storage part, estimated based on a result of measurement by the yield measuring device, having exceeded the predetermined amount.