Harvester

Abstract

To provide a harvester capable of performing separation control with optimum air quantity and sieve opening solving a problem with a conventional harvester in which increasing / decreasing control for air quantity of a fan and sieve opening by detecting a grain amount by a layer thickness sensor for detecting layer thickness of materials to be processed provided on a swinging separation shelf of a thresher that there is a risk of reducing a yield when separation control is performed with the air quantity and sieve opening which are not optimum with respect to a grain amount since the fan air quantity and sieve opening are controlled by one increasing / decreasing range.SOLUTION: A harvester in which a fan and a sieve are provided in a separation device for separating grains and contaminants such as waste straws of a thresher for separating and sorting out grains from grain culms reaped and conveyed by a reaping device, and a grain amount sensor is provided for detecting an amount of grains passing through the separation device has a plurality of control modes with different change ranges of the fan air quantity and the sieve opening, and the control mode is determined by a detection value of the grain amount sensor.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a harvester equipped with a threshing device that threshes grain stalks harvested by a reaping device. [Background technology]

[0002] Conventionally, there is a harvester that controls the wind volume of the winnower and the opening degree of the sieve by detecting the amount of grain using a layer thickness sensor that detects the layer thickness of the material to be processed and is installed on the swinging sorting shelf of the threshing device (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-057402 A Summary of the Invention [Problem to be solved by the invention]

[0004] Because the winnower air volume and sieve opening are controlled within a single range of increase or decrease, sorting control may be performed at an air volume or sieve opening that is not optimal for the amount of grain, which may result in a reduction in yield.

[0005] Therefore, the present invention provides a harvester that can perform sorting control with optimal air volume and sieve opening. [Means for solving the problem]

[0006] The invention described in claim 1 is a harvester in which a sorting device 16 is equipped with a winnowing machine 20 and a sieve 18 to separate grains from impurities such as straw in a threshing device 3 which separates and sorts grains from the stalks harvested and transported by a harvesting device 4, and a grain quantity sensor 25 is provided to detect the amount of grains passing through the sorting device 16, in which multiple control modes are provided with different ranges of change for the wind force of the winnowing machine 20 and the opening of the sieve 18, and the control mode is determined by the detection value of the grain quantity sensor 25.

[0007] According to the invention described in claim 1, multiple control modes are provided with different ranges of change for the wind power of the winnower 20 and the opening of the sieve 18, and the control mode is determined by the detection value of the grain quantity sensor 25, so that sorting control can be performed with the optimal air volume and sieve opening.

[0008] The invention described in claim 2 is a harvester as described in claim 1 which is provided with setting units 40U, 40D, 43U, 43D which set the lower and upper limits of the change range of the wind power of the winnower 20 and the opening of the sieve 18 for each control mode, and which starts control of each control mode from the lower limit value.

[0009] According to the invention described in claim 2, setting units 40U, 40D, 43U, 43D are provided for setting the minimum and maximum limits of the change range of the wind power of the winnower 20 and the opening of the sieve 18 for each control mode, thereby making it possible to set the range appropriate for the variety and working environment, thereby improving sorting accuracy and working efficiency.

[0010] Since each control mode starts from the lowest limit value, it is possible to prevent the wind force of the winnower 20 from being too strong or the opening of the sieve 18 from being too large, thereby reducing sorting errors and losses.

[0011] The invention described in claim 3 is a harvester as described in claim 1 or claim 2, which is provided with a front camera 7 that photographs the culms to be harvested in front of the machine and / or a rear camera 8 that photographs the straw discharged to the rear of the machine, and which automatically corrects the wind force of the winnower 20 and the opening of the sieve 18 when the image captured by the front camera 7 is analyzed to determine that the number of green pixels of the culms to be harvested in front is a predetermined value or more and / or when the image captured by the rear camera 8 is analyzed to determine that the discharged straw has a predetermined value or more of grains with stalks attached.

[0012] According to the invention described in claim 3, a front camera 7 is provided for photographing the stalks to be harvested in front of the machine body and / or a rear camera 8 for photographing the straw discharged to the rear of the machine body, and when the image captured by the front camera 7 is analyzed to determine that the number of green pixels of the stalks to be harvested in front is equal to or greater than a predetermined value and / or when the image captured by the rear camera 8 is analyzed to determine that the discharged straw has more than a predetermined value of grains with stalks attached, the wind force of the winnower 20 and the opening of the sieve 18 are automatically corrected, thereby enabling appropriate sorting to prevent a decrease in yield.

[0013] The invention described in claim 4 is a harvester as described in claim 1 or claim 2, which determines whether the harvested stalks are moist or not based on the detection value of a moisture meter 28 that measures the moisture content of the stalks and is provided in a transport section that transports the stalks harvested by the harvesting device 4 toward the threshing device 3, and if it is determined that the harvested stalks are moist, increases the air volume of the winnowing machine 20 and increases the opening of the sieve 18.

[0014] According to the invention described in claim 4, whether the harvested stalks are moist or not is determined based on the detection value of a moisture meter 28 that measures the moisture content of the stalks and is provided in the transport section that transports the harvested stalks by the harvesting device 4 toward the threshing device 3.If it is determined that the harvested stalks are moist, the air volume of the winnowing machine 20 is increased and the opening of the sieve 18 is made larger, thereby reducing the amount of ears that are not separated from the grains and are discharged together with the straw, thereby preventing a decrease in yield. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a side view of a combine harvester according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a side cross-sectional view of the threshing device of the combine. [Diagram 3] FIG. 2 is a side cross-sectional view of the main parts of the threshing device. [Figure 4] FIG. 4 is a side view for explaining the operation of the layer thickness sensor. [Diagram 5] FIG. [Figure 6] FIG. 4 is an explanatory diagram of the operation of the wind force control setting unit. [Figure 7]5 is an explanatory diagram of the operation of an opening control setting unit. FIG. [Figure 8] FIG. [Figure 9] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, a combine harvester as one embodiment of the harvester of the present invention will be described in detail with reference to the drawings.

[0017] For ease of understanding, the following description will refer to the front as the front side, the rear as the rear side, the right hand side as the right side, and the left hand side as the left side, as viewed from the pilot's perspective; however, the present invention is not limited to these terms.

[0018] As shown in Figure 1, reference numeral 1 denotes the machine frame, 2 denotes a running gear mounted on the lower part of the machine frame 1, 3 denotes a threshing device mounted on the machine frame 1, 4 denotes a reaping device, 5 denotes a grain tank, and 6 denotes a control unit mounted on one side in front of the threshing device 3.

[0019] The reaping device 4 is attached so as to be movable up and down by a reaping up and down cylinder.

[0020] A front camera 7 is provided at the upper front portion of the reaping device 4 to photograph the culms to be reaped in front.

[0021] The control device 27 performs image analysis on the image sent from the front camera 7 and judges whether the number of green pixels of the culms to be harvested in front is equal to or greater than a predetermined value. If the number of green pixels of the culms to be harvested is equal to or greater than a predetermined value, it judges that a large air volume of the winnower 20 is required at the beginning of the optimum harvesting period, and therefore that the opening of the sieve 18 needs to be increased.

[0022] A rear camera 8 is provided at the upper rear of the machine body to photograph the discharged straw.

[0023] The control device 27 performs image analysis on the image sent from the rear camera 8 to determine whether the number of grains with rachis branches attached to the discharged straw chips is equal to or greater than a predetermined number. If the number of grains with rachis branches attached to the discharged straw chips is equal to or greater than a predetermined number, it determines that a large air volume is required from the winnower 20 and that the opening of the sieve 18 needs to be increased.

[0024] Further, a moisture meter 28 for measuring the moisture content of the rice is provided in the conveying section that conveys the culms harvested by the reaping device 4 toward the threshing device 3.

[0025] The control device 27 judges whether the harvested rice is wet or not based on the detection value sent from the moisture meter 28. If it judges that the harvested rice is wet, it increases the air volume of the winnower 20 and controls the opening of the sieve 18 to be larger.

[0026] In addition, a vehicle speed sensor 29 is provided on the vehicle body.

[0027] The control device 27 recognizes the current vehicle speed based on the detection value sent from the vehicle speed sensor 29 .

[0028] In addition, GNSS30 is installed on the top of the aircraft.

[0029] The control device 27 records map data, calculates the current aircraft position based on input from the GNSS 30, and stores the calculated position in the map data in chronological order.

[0030] As shown in Figures 2 and 3, a threshing chamber 10 is provided above the threshing device 3 to thresh the stalks harvested by the harvesting device 4 and transported by the feed chain 9, and a threshing drum 11 is mounted on a threshing drum shaft 12 within the threshing chamber 10.

[0031] The lower side of the handling drum 11 is mainly surrounded by a handling net 15.

[0032] A transfer shelf 17 at the start end of a swinging sorting shelf 16 serving as a sorting device is provided below the handling net 15. A sieve 18 for separating grains from foreign objects is provided below the transfer shelf 17, and a straw rack 19 for transporting straw waste is provided below the sieve 18.

[0033] A winnower 20 is provided below the transfer shelf 17 of the oscillating sorting shelf 16, and the winnower 20 blows air toward the oscillating sorting shelf 16.

[0034] 21 is conveyor number 1 and 22 is conveyor number 2.

[0035] As shown in Figs. 2 to 4, at a predetermined position above the oscillating sorting shelf 16, a layer thickness sensor 25 serving as a grain amount sensor for detecting the layer thickness of grains (material to be processed) on the oscillating sorting shelf 16 is provided in the left-right central position.

[0036] The layer thickness sensor 25 has a sensor body 25a disposed at the left-right central position of an attachment stay 26 fixed to the left and right machine frames of the threshing device 3, and a detection arm 25b, the base of which is freely rotatable on the sensor body 25a, extends toward the oscillating sorting shelf 16, and the detection arm 25b is freely rotatable upward from an initial angle A.

[0037] The layer thickness sensor 25 has a detection arm 25b which rotates upward from an initial angle A depending on the layer thickness of the grains on the oscillating sorting shelf 16, and the sensor body 25a sends a detection voltage to the control device 27 according to the rotation angle.

[0038] In other words, when the layer thickness of the grains on the oscillating sorting shelf 16 is thin (the amount of grains is small), a low detection voltage is sent to the control device 27, and as the layer thickness increases (the amount of grains increases), a high detection voltage is sent, so that the control device 27 can recognize the layer thickness of the grains on the oscillating sorting shelf 16 based on the detection voltage from the layer thickness sensor 25.

[0039] Specifically, the threshold value is the range in which the detection arm 25b of the layer thickness sensor 25 rotates upward from the initial angle A by less than 5 degrees, the noise region in which impurities and the like are moving on the oscillating sorting shelf 16 is defined, and the sensor voltage value output by the layer thickness sensor 25 is less than 1 V.

[0040] The range in which the detection arm 25b of the layer thickness sensor 25 rotates upward from the initial angle A by 5 degrees or more but less than 15 degrees is the small grain amount area where a small amount of grains are moving on the oscillating sorting shelf 16, and the sensor voltage value output by the layer thickness sensor 25 is 1V or more but less than 3V.

[0041] The range in which the detection arm 25b of the layer thickness sensor 25 rotates upward from the initial angle A by 15 degrees or more but less than 30 degrees is the medium grain amount region in which a medium amount of grains are moving on the oscillating sorting shelf 16, and the sensor voltage value output by the layer thickness sensor 25 is 3V or more but less than 5V.

[0042] The range in which the detection arm 25b of the layer thickness sensor 25 rotates upward from the initial angle A by 30 degrees or more but less than 45 degrees is the grain volume region where a large number of grains are moving on the oscillating sorting shelf 16, and the sensor voltage value output by the layer thickness sensor 25 is 5 V or more.

[0043] Figure 5 is a control block diagram, in which a moisture meter 28, a vehicle speed sensor 29, a GNSS 30, a layer thickness sensor 25, a front camera 7 and a rear camera 8 are connected to the input side of a control device 27, and a transmission 20a that changes the rotational speed of the winnower 20 and a sheave rotation motor 18a that changes the opening of the sheave 18 are connected to the output side.

[0044] Figure 6 shows the wind power control setting section of the winnower 20 provided on the control unit 6, in which the control device 27 controls the transmission 20a to change the rotational speed of the winnower 20 and automatically sets the range in which the wind power is changed to MAX mode, MID mode, and MIN mode, and the minimum and maximum wind powers for each mode are manually set using the first manual increase / decrease buttons 40U, 40D, and an example display is shown in which the manually set wind power is displayed on the first display unit 41.

[0045] That is, in the MAX mode, the lowest wind limit and highest wind limit of the winnower 20 are manually set within the range of 1.8 m / s to 3.3 m / s using the first manual increase / decrease buttons 40U, 40D, and the set wind force is displayed on the first display unit 41. The diagram on the left side of the MAX mode in Fig. 6 is an example of the display when the lowest wind force is manually set, and the diagram on the right side of the MAX mode is an example of the display when the highest wind force is manually set.

[0046] In the MID mode, the lowest wind speed limit and highest wind speed limit of the winnower 20 are manually set within the range of 1.4 m / s to 2.8 m / s using the first manual increase / decrease buttons 40U, 40D, and the set wind speed is displayed on the first display unit 41. The diagram on the left side of the MID mode in Fig. 6 is a display example when the lowest wind speed limit is manually set, and the diagram on the right side of the MID mode is a display example when the highest wind speed limit is manually set.

[0047] In the MIN mode, the lowest wind speed and highest wind speed of the winnower 20 are manually set within the range of 0.9 m / s to 2.4 m / s using the first manual increase / decrease buttons 40U, 40D, and the set wind speed is displayed on the first display unit 41. The diagram on the left side of the MIN mode in Fig. 6 is an example of the display when the lowest wind speed is manually set, and the diagram on the right side of the MIN mode is an example of the display when the highest wind speed is manually set.

[0048] As explained below in the control flow diagrams of Figures 8 and 9, the control device 27 controls the speed change device 20a to change the rotational speed of the winnower 20 and automatically sets the range for changing the wind power to MAX mode, MID mode, and MIN mode. However, in preference to the automatic setting by this control, it is also possible to manually switch to any of the MAX mode, MID mode, and MIN mode using the first mode manual switch button 42 in the wind power control setting section.

[0049] FIG. 7 shows an opening control setting section for the sheave 18 provided in the control section 6, in which the control device 27 controls the sheave rotating motor 18a to automatically set the range in which the opening of the sheave 18 is changed to MAX mode, MID mode, and MIN mode, and the minimum and maximum openings of each mode are manually set using the second manual increase / decrease buttons 43U, 43D, and the manually set openings are displayed on the second display section 44, showing an example of such a display.

[0050] That is, in the MAX mode, the lowest limit opening and the highest limit opening of the sheave 18 are manually set within a range of 60 degrees to 90 degrees by the second manual increase / decrease buttons 43U, 43D, and the set opening is displayed on the second display unit 44. The diagram on the left side of the MAX mode in Fig. 7 is a display example when the lowest limit opening is manually set, and the diagram on the right side of the MAX mode is a display example when the highest limit opening is manually set.

[0051] In the MID mode, the lowest limit opening and the highest limit opening of the sheave 18 are manually set within a range of 45 degrees to 75 degrees using the second manual increase / decrease buttons 43U, 43D, and the set opening is displayed on the second display unit 44. The diagram on the left side of the MAX mode in Fig. 7 is a display example when the lowest limit opening is manually set, and the diagram on the right side of the MAX mode is a display example when the highest limit opening is manually set.

[0052] In the MIN mode, the lowest limit opening and the highest limit opening of the sheave 18 are manually set within a range of 30 degrees to 60 degrees using the second manual increase / decrease buttons 43U, 43D, and the set opening is displayed on the second display unit 44. The diagram on the left side of the MAX mode in Fig. 7 is a display example when the lowest limit opening is manually set, and the diagram on the right side of the MAX mode is a display example when the highest limit opening is manually set.

[0053] As will be explained below with reference to the control flow diagrams of Figures 8 and 9, the range in which the control device 27 controls the sheave rotating motor 18a to change the opening of the sheave 18 is automatically set to MAX mode, MID mode, and MIN mode, but in preference to the automatic setting by this control, it is also possible to manually switch to any of the MAX mode, MID mode, and MIN mode using the second mode manual switch button 45 of the opening control setting section.

[0054] Next, a method for controlling the wind force of the winnower 20 and the opening degree of the sieve 18 when the combine harvester is performing harvesting work will be described with reference to the control flow diagrams of Figs.

[0055] FIG. 8 is a control flow diagram in which the image captured by the front camera 7 is analyzed and reflected in the wind force control of the winnower 20 and the opening control of the sieve 18.

[0056] When the combine engine is started, the system reads the minimum and maximum wind forces of each winnower 20 in MAX mode, MID mode, and MIN mode, which have been manually set using the first manual increase / decrease buttons 40U, 40D of the wind force control setting section of the winnower 20, reads the minimum and maximum opening degrees of each sieve 18 in MAX mode, MID mode, and MIN mode, which have been manually set using the second manual increase / decrease buttons 43U, 43D of the sieve 18 opening control setting section, determines that the machine is moving from the detection value of the vehicle speed sensor 29, determines the amount of grain from the detection value of the layer thickness sensor 25, and analyzes the image captured by the front camera 7 to calculate the number of green pixels.

[0057] When harvesting work begins (when control begins), the wind force of the winnower 20 and the opening degree of the sieve 18 are controlled in MID mode, the wind force of the winnower 20 is controlled according to the detection value of the layer thickness sensor 25 within the range of the minimum wind force and maximum wind force set in the MID mode, and the opening degree of the sieve 18 is controlled within the range of the minimum opening degree and maximum opening degree set in the MID mode.

[0058] It should be noted that the greater the detection value of the layer thickness sensor 25 (the greater the amount of grains), the stronger the wind force of the winnower 20 is made and the greater the opening of the sieve 18 is made.

[0059] Then, when the detection value of the layer thickness sensor 25 becomes greater than a predetermined value (when the amount of grain becomes greater than a predetermined value), the control device 27 changes from MID mode to MAX mode, controls the wind force of the winnower 20 according to the detection value of the layer thickness sensor 25 within the range of the lowest wind force and the highest wind force set in the MAX mode, and controls the opening of the sieve 18 within the range of the lowest opening degree and the highest opening degree set in the MAX mode.

[0060] Then, by analyzing the image captured by the front camera 7, if the number of green pixels of the stalks to be harvested in front is equal to or greater than a predetermined value, the wind power of the winnower 20 is increased (the wind volume is increased) and the opening of the sieve 18 is made larger.

[0061] In addition, when the detection value of the layer thickness sensor 25 becomes smaller than a predetermined value (when the amount of grains becomes smaller than a predetermined value), the control device 27 changes from MID mode to MIN mode, controls the wind force of the winnower 20 according to the detection value of the layer thickness sensor 25 within the range of the lowest wind force and the highest wind force set in the MIN mode, and controls the opening of the sieve 18 within the range of the lowest opening degree and the highest opening degree set in the MIN mode.

[0062] Then, by analyzing the image captured by the front camera 7, if the number of green pixels of the stalks to be harvested in front is equal to or greater than a predetermined value, the wind power of the winnower 20 is increased (the wind volume is increased) and the opening of the sieve 18 is made larger.

[0063] FIG. 9 is a control flow diagram in which the image captured by the rear camera 8 is analyzed and reflected in the wind force control of the winnower 20 and the opening control of the sieve 18.

[0064] When the combine engine is started, the system reads the minimum and maximum wind forces of each winnower 20 in MAX mode, MID mode, and MIN mode, which have been manually set using the first manual increase / decrease button 40U, 40D of the wind force control setting section of the winnower 20, reads the minimum and maximum opening degrees of each sieve 18 in MAX mode, MID mode, and MIN mode, which have been manually set using the second manual increase / decrease button 43U, 43D of the sieve 18 opening control setting section, determines that the machine is moving from the detection value of the vehicle speed sensor 29, determines the amount of grain from the detection value of the layer thickness sensor 25, and analyzes the image captured by the rear camera 8 to calculate the number of grains with stalk branches attached to the straw waste discharged.

[0065] When harvesting work begins (when control begins), the wind force of the winnower 20 and the opening degree of the sieve 18 are controlled in MID mode, the wind force of the winnower 20 is controlled according to the detection value of the layer thickness sensor 25 within the range of the minimum wind force and maximum wind force set in the MID mode, and the opening degree of the sieve 18 is controlled within the range of the minimum opening degree and maximum opening degree set in the MID mode.

[0066] It should be noted that the greater the detection value of the layer thickness sensor 25 (the greater the amount of grains), the stronger the wind force of the winnower 20 is made and the greater the opening of the sieve 18 is made.

[0067] Then, when the detection value of the layer thickness sensor 25 becomes greater than a predetermined value (when the amount of grain becomes greater than a predetermined value), the control device 27 changes from MID mode to MAX mode, controls the wind force of the winnower 20 according to the detection value of the layer thickness sensor 25 within the range of the lowest wind force and the highest wind force set in the MAX mode, and controls the opening of the sieve 18 within the range of the lowest opening degree and the highest opening degree set in the MAX mode.

[0068] Then, by analyzing the image captured by the rear camera 8, if the discharged straw has a predetermined number of grains with rachis branches attached thereto or more, the wind force of the winnower 20 is increased (air volume is increased) and the opening of the sieve 18 is made larger.

[0069] In addition, when the detection value of the layer thickness sensor 25 becomes smaller than a predetermined value (when the amount of grains becomes smaller than a predetermined value), the control device 27 changes from MID mode to MIN mode, controls the wind force of the winnower 20 according to the detection value of the layer thickness sensor 25 within the range of the lowest wind force and the highest wind force set in the MIN mode, and controls the opening of the sieve 18 within the range of the lowest opening degree and the highest opening degree set in the MIN mode.

[0070] Then, by analyzing the image captured by the rear camera 8, if the discharged straw has a predetermined number of grains with rachis branches attached thereto or more, the wind force of the winnower 20 is increased (air volume is increased) and the opening of the sieve 18 is made larger.

[0071] The above-mentioned controls in the control flow diagrams of Figures 8 and 9 operate separately or simultaneously. In addition, when the control in the MAX mode, MID mode, and MIN mode starts, it starts from the lowest limit value (lowest limit wind force, lowest limit opening).

[0072] In addition, the detection value of a moisture meter 28 that measures the moisture content of rice and is provided in the transport section that transports the harvested stalks by the harvesting device 4 toward the threshing device 3 can be used to determine whether the harvested stalks are moist or not.If it is determined that the harvested stalks are moist, the air volume of the winnowing machine 20 can be increased and the opening of the sieve 18 can be controlled to be larger.

[0073] The control device 27 may also calculate the current aircraft position based on input from the GNSS 30, store the wind control data for the winnower 20 and the opening control of the sieve 18 in the map data, and apply these to the harvesting work in the field in the next fiscal year. Note that the wind control data for the winnower 20 and the opening control of the sieve 18 may be stored in the map data for several years, allowing appropriate data to be selected for use, or more appropriate data may be overwritten and stored.

[0074] In summary, MAX mode, MID mode, and MIN mode are provided as multiple control modes with different change ranges for the wind power of the winnower 20 and the opening of the sieve 18, and the control mode is determined by the detection value of the layer thickness sensor 25, so that sorting control can be performed with the optimal air volume and sieve opening.

[0075] In addition, there are provided first manual increase / decrease buttons 40U, 40D and second manual increase / decrease buttons 43U, 43D, which are setting sections for setting the minimum and maximum limits of the change range of the wind power of the winnower 20 and the opening of the sieve 18 in the MAX mode, MID mode and MIN mode. This allows settings to be made suitable for the variety and working environment, improving sorting accuracy and working efficiency.

[0076] In addition, since the control of the MAX mode, MID mode, and MIN mode starts from the lowest limit value, it is possible to prevent the wind force of the winnower 20 from being too strong or the opening of the sieve 18 from being too large, thereby reducing sorting errors and losses.

[0077] In addition, a front camera 7 is provided which photographs the stalks to be harvested in front of the machine, and / or a rear camera 8 which photographs the straw discharged to the rear of the machine.The image taken by the front camera 7 is analyzed, and if the number of green pixels of the stalks to be harvested in front is equal to or greater than a predetermined value, the wind force of the winnower 20 is increased and the opening of the sieve 18 is increased.The image taken by the rear camera 8 is analyzed, and if the number of grains with stalks attached in the discharged straw is equal to or greater than a predetermined value, the wind force of the winnower 20 is increased and the opening of the sieve 18 is increased.The wind force of the winnower 20 and the opening of the sieve 18 are automatically corrected, allowing appropriate sorting to be performed and preventing a decrease in yield.

[0078] In addition, whether the harvested stalks are moist or not is determined based on the detection value of a moisture meter 28 that measures the moisture content of the stalks and is provided in the transport section that transports the harvested stalks by the harvesting device 4 toward the threshing device 3. If it is determined that the harvested stalks are moist, the air volume of the winnowing machine 20 is increased and the opening of the sieve 18 is made larger, thereby reducing the amount of ears that are not separated from the grains and are discharged together with the straw, thereby preventing a decrease in yield. [Explanation of symbols]

[0079] 3. Threshing equipment 4 Reaping device 7. Front Camera 8. Rear Camera 16 Sorting Equipment 18 Sheaves 20 Karakinoh 25 Grain quantity sensor (layer thickness sensor) 28 Moisture meter 40U, 40D Setting section (first manual increase / decrease button) 43U, 43D Setting section (second manual increase / decrease button)

Claims

1. This harvester is characterized in that a winnower (20) and a sieve (18) are provided in a sorting device (16) that separates grains from impurities such as straw and the like in a threshing device (3) that separates and sorts grains from the stalks harvested and transported by a harvesting device (4), and a grain quantity sensor (25) is provided to detect the amount of grains passing through the sorting device (16), and that a plurality of control modes are provided with different ranges of change for the wind force of the winnower (20) and the opening degree of the sieve (18), and the control mode is determined by the detection value of the grain quantity sensor (25).

2. A harvester as described in claim 1, characterized in that a setting unit (40U, 40D, 43U, 43D) is provided for setting the lower limit and upper limit of the change range of the wind power of the winnower (20) and the opening degree of the sieve (18) for each control mode, and control of each control mode starts from the lower limit value.

3. A harvester as described in claim 1 or claim 2, characterized in that it is provided with a front camera (7) that photographs the culms to be harvested in front of the machine body and / or a rear camera (8) that photographs the straw discharged to the rear of the machine body, and automatically corrects the wind force of the winnowing machine (20) and the opening degree of the sieve (18) when the image captured by the front camera (7) is analyzed to determine that the number of green pixels of the culms to be harvested in front is a predetermined value or more and / or when the image captured by the rear camera (8) is analyzed to determine that the discharged straw has a predetermined value or more of grains with stalks attached.

4. A harvester as described in claim 1 or claim 2, characterized in that whether the harvested stalks are moist or not is determined based on the detection value of a moisture meter (28) that measures the moisture content of the stalks and is provided in a conveying section that conveys the harvested stalks by the harvesting device (4) toward the threshing device (3), and if it is determined that the harvested stalks are moist, the air volume of the winnowing machine (20) is increased and the opening of the sieve (18) is made larger.

Images