Combine harvester

Abstract

Provided are: a threshing device that threshes crops; a grain tank (12) that stores the grains obtained by the threshing device; a conveyance device (29, 30) that conveys the grains obtained by the threshing device from the threshing device to the grain tank (12); and a flow rate measuring device (60) that measures the flow rate of the grains conveyed by the conveyance device (29, 30). The flow rate measuring device (60) is equipped with: an arm portion (63) that swings in contact with the conveyed grains; a sensor portion that detects the swing angle of the arm portion (63); and a calculation portion that calculates the flow rate based on the swing angle detected by the sensor portion.

Description

TECHNICAL FIELD

[0001] The present application relates to a combine harvester provided with a conveying device that conveys grain obtained by a threshing device from the threshing device to a grain tank, and a flow rate measuring device that measures a flow rate of grain conveyed by the conveying device. BACKGROUND

[0002] In a combine harvester disclosed in Japanese Patent Application Publication No. 2019-004790 (Patent Literature 1), for example, a flow rate of grain conveyed by a conveying device (literature's "grain conveying device") is measured by a flow rate measuring device (literature's "detection section"). The flow rate measuring device is provided with a sensing plate and a load cell, and grain contacts the sensing plate, and a load applied to the sensing plate is detected by the load cell.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2019-004790 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] However, if the combine harvester performs a harvesting operation while traveling in a field, vibrations caused by unevenness of the field, vibrations from an engine, and the like are transmitted to the load cell. If the sensing plate resonates due to such vibrations, noise of the vibrations is mixed in the measurement data of the load cell, and there is a risk that the flow rate of grain cannot be measured with high precision. Therefore, in order to achieve further improvement in detection precision, a flow rate measuring device that is less likely to be affected by vibrations of the combine harvester is needed.

[0008] An object of the present application is to provide a combine harvester capable of detecting a yield of grain with high precision.

[0009] MEANS FOR SOLVING THE PROBLEMS

[0010] In the combine harvester of the present application, characterized by comprising: a threshing device that performs a threshing process on a crop; a grain tank that stores grain obtained by the threshing device; a conveying device that conveys the grain obtained by the threshing device from the threshing device to the grain tank; and a flow rate measuring device that measures a flow rate of grain conveyed by the conveying device, the flow rate measuring device is provided with: an arm portion that swings in contact with the grain being conveyed; a sensor portion that detects a swing angle of the arm portion; and a calculation portion that calculates the flow rate based on the swing angle detected by the sensor portion.

[0011] According to the present application, if the grains contact the arm portion, the arm portion swings, and the swing angle of the arm portion is detected by the sensor portion. In a case where the arm portion resonates due to vibration of the combine harvester, for example, if the configuration is adopted in which the load applied to the arm portion is detected by the sensor portion (for example, a load cell), the influence of the resonance on the detection of the load by the sensor portion easily becomes large. On the other hand, even if the arm portion resonates, the arm portion does not swing only due to the resonance, and therefore if the configuration is adopted in which the swing angle of the arm portion is detected by the sensor portion, the influence of the resonance on the detection of the swing angle by the sensor portion is small. Therefore, for example, compared with the configuration in which the load applied to the arm portion is detected by the sensor portion, the flow rate measuring device is less likely to be affected by the vibration of the combine harvester. That is, the magnitude of the swing angle of the arm portion is less likely to be affected by the vibration of the combine harvester, and therefore the calculation portion can calculate the flow rate of the grains with high accuracy on the basis of the magnitude of the swing angle. Thus, a combine harvester capable of detecting the yield of the grains with high accuracy can be realized.

[0012] In the present application, it is preferable that the conveying device be provided with a throwing portion that throws the grains, and the arm portion swing by being contacted by the grains thrown by the throwing portion.

[0013] If the grains are thrown by the throwing portion, the grains are likely to strongly contact the arm portion. According to the present configuration, even if the grains thrown by the throwing portion are small in amount, the arm portion reliably swings, and therefore the measurement accuracy of the flow rate measuring device is improved.

[0014] In the present application, it is preferable that the sensor portion be provided at a position deviated from a throwing path of the grains thrown by the throwing portion, in a state partitioned from the throwing path.

[0015] According to the present configuration, since the sensor portion is provided at a position deviated from the throwing path of the grains, there is no risk that the grains collide with the sensor portion. Therefore, compared with the configuration in which the sensor portion is provided in a state not partitioned from the throwing path, the flow of the grains thrown by the throwing portion is not hindered.

[0016] In the present application, it is preferable that the arm portion be configured to swing around a swing axis core provided at a position deviated from a throwing path of the grains thrown by the throwing portion.

[0017] According to the present configuration, since the swing axis core of the arm portion is provided at a position deviated from the throwing path of the grains, compared with the configuration in which the swing axis core of the arm portion is located within the range of the throwing path of the grains, the arm portion is likely to swing due to contact with the grains.

[0018] In the present application, it is preferable that the arm portion be configured such that the greater the swing angle, the greater the proportion of the arm portion that extends outside the throwing path.

[0019] If the grains come into contact with the arm portion, the grains are bounced back by the arm portion, and thus there is a risk that the grains flow in an undesired direction deviating from the throwing path. The more the grains come into contact with the arm portion, the greater the swinging angle of the arm portion. That is, according to the present configuration, the more the grains flow through the throwing path, the more the portion in the arm portion that protrudes outside the throwing path, and the smaller the proportion of the grains that are bounced back by the arm portion. Thus, compared with a configuration in which a larger portion of the arm portion is located within the range of the throwing path regardless of the swinging angle of the arm portion, the flow of the grains thrown by the throwing portion is less likely to be hindered.

[0020] In the present application, it is preferable that the conveying device is equipped with a longitudinal conveying portion of a bucket conveyor type having a plurality of buckets that elevate the grains obtained by the grain separating device, and a transverse conveying portion of a screw conveyor type having a screw that rotates around a machine transverse axis core and is connected to the longitudinal conveying portion in an adjacent state, receives the grains conveyed by the longitudinal conveying portion and transversely conveys and feeds to the grain tank, a discharge port for the grains thrown by the bucket that reverses the posture from the raised posture to the lowered posture at the upper end portion is equipped at the side portion on the side opposite to the conveying path in the return path side portion of the upper end portion of the longitudinal conveying portion, the transverse conveying portion is connected to the discharge port, an interface space of the longitudinal conveying portion and the transverse conveying portion is formed outside the discharge port and above the transverse conveying portion, and the arm portion is configured to swing around a swinging axis core provided at a position between the discharge port and the machine transverse axis core in the longitudinal conveying portion and the transverse conveying portion adjacent direction at a position higher than the screw in the interface space.

[0021] According to the present configuration, the grains obtained by threshing the crops are delivered upward by the bucket of the longitudinal delivery unit, and are thrown from the discharge port provided at the upper end of the longitudinal delivery unit to the lateral delivery unit. Further, the flow measuring device is arranged in the delivery space between the longitudinal delivery unit and the lateral delivery unit. If the arm portion is too close to the bucket, in the case where the grains are bounced back by the arm portion upon contact with the arm portion, the grains fall down on the return path to the bucket, and thus there is a risk that the delivery efficiency of the grains in the delivery space is reduced. In addition, if the arm portion is too far from the bucket, there is a concern that the grains contact the arm portion in a state where the momentum of the grains is weak, and the arm portion does not swing sufficiently. According to the present configuration, the swing axis core of the arm portion is located between the discharge port and the body lateral axis core of the screw. Thus, even in the case where the grains contact the arm portion upon contact with the arm portion on the outside of the discharge port and are bounced back by the arm portion, the grains have already passed through the discharge port and are located above the lateral delivery unit, and thus most of the grains fall down to the lateral delivery unit as they are. In addition, compared to the configuration in which the swing axis core of the arm portion is located on the side opposite to the side on which the discharge port is located, compared to the body lateral axis core of the screw, the grains reliably contact the arm portion, and the arm portion reliably swings. Thus, the flow measuring device does not hinder the flow of the grains in the delivery space between the longitudinal delivery unit and the lateral delivery unit, and can accurately measure the flow of the grains.

[0022] In the present application, it is preferable that the arm portion be provided in a vertically downward posture opposite the discharge port in a state not in contact with the grains, and be configured to be shorter than the vertical length of the discharge port.

[0023] According to the present configuration, since the arm portion in a state not in contact with the grains is provided in a vertically downward posture opposite the discharge port, the grains thrown from the discharge port contact the arm portion with a strong momentum, and the arm portion reliably swings. In addition, since the arm portion in a state not in contact with the grains is in a vertically downward posture, even if vertical vibrations occur, the arm portion is less likely to swing due to the vertical vibrations, and the influence of the vibrations on the detection of the swing angle by the sensor portion is further reduced.

[0024] In the present application, it is preferable that the lateral width of the arm portion be set to be narrower than the lateral width of the opening of the bucket.

[0025] The grains are thrown from the bucket over the lateral width of the opening of the bucket. According to the present configuration, the lateral width of the arm portion is narrower than the lateral width of the opening of the bucket, and thus only a part of the grains thrown over the lateral width of the opening of the bucket contact the arm portion. Thus, most of the grains are not hindered from flowing, but are smoothly delivered to the lateral delivery unit.

[0026] In the present application, it is preferable that the arm portion be provided inside the grain tank.

[0027] The inside of the grain tank has a relatively wide space in the combine harvester, but it is considered that the portion in the grain delivery path located outside the grain tank is relatively narrow. Therefore, according to the present configuration, the degree of freedom of the layout of the arm portion is higher compared to the configuration in which the arm is provided at the portion in the grain delivery path located outside the grain tank.

[0028] In the present application, it is preferable that the arm portion be suspended and supported from the ceiling of the grain tank.

[0029] According to the present configuration, since the ceiling of the grain tank serves as the support for the arm portion, the support configuration of the arm portion is easily simplified.

[0030] In the present application, it is preferable that the delivery device be provided with a longitudinal delivery portion having a longitudinal screw that rotates around an axis core in the upward-downward direction and elevates and delivers the grain obtained by the grain separating device to the grain tank, and the arm portion be located at a position that is forward of the axis core of the longitudinal screw in the advancing direction.

[0031] If the grain tank is filled with grain, the arm portion is buried in the grain and cannot swing. On the other hand, when the grain stored in the grain tank is discharged, the grain inside the grain tank is generally guided rearward by the grain discharge device, and thus the grain is generally stored biased toward the rear portion of the inside of the grain tank. According to the present configuration, since the arm portion is located forward of the axis core of the longitudinal screw in the advancing direction, the arm portion is less likely to be buried in the grain compared to the configuration in which the arm portion is located rearward of the axis core of the longitudinal screw in the advancing direction. Therefore, even in the case where the grain tank is filled with grain to reach the full tank, the arm portion can reliably swing until just before the grain tank is full, and the flow rate of the grain can be reliably measured.

[0032] In the present application, it is preferable that the arm portion swing around an axis core in a direction that intersects the left-right direction of the machine body in plan view.

[0033] If the arm portion swings around an axis core in the left-right direction of the machine body in plan view, the arm portion is likely to swing in the front-rear direction due to acceleration and deceleration accompanying the travel of the combine harvester. That is, if the arm portion swings in the front-rear direction, the acceleration and deceleration of the combine harvester becomes a disturbing factor in the calculation of the flow rate of the grain. According to the present configuration, since the arm portion swings in the left-right direction, the disturbance caused by the acceleration and deceleration of the combine harvester is suppressed in the calculation of the flow rate of the grain compared to the configuration in which the arm portion swings in the front-rear direction. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a whole right side view of the combine harvester.

[0035] Figure 2 is a whole plan view of the combine harvester.

[0036] Figure 3 is a longitudinal sectional left side view of the threshing device.

[0037] Figure 4 is a front view of the grain tank, the elevating device, and the threshing device.

[0038] Figure 5 is a longitudinal sectional right side view of the elevating device showing the primary material sensor.

[0039] Figure 6 is a plan view showing the primary material sensor.

[0040] Figure 7 is a longitudinal sectional view in the machine body front-rear direction showing the primary material sensor.

[0041] Figure 8 is a longitudinal sectional right side view of the elevating device showing the state in which the primary material sensor detects the grain.

[0042] Figure 9 is a longitudinal sectional right side view of the elevating device showing the state in which the primary material sensor detects the grain.

[0043] Figure 10 is a disposition view of the secondary material sensor and the secondary material discharge port.

[0044] Figure 11 is a disposition view of the secondary material sensor and the secondary material discharge port.

[0045] Figure 12 is a disposition view of the secondary material sensor and the secondary material discharge port.

[0046] Figure 13 is a side view of the secondary material sensor.

[0047] Figure 14 is a longitudinal sectional right side view of the elevating device showing the state in which the bucket contacts the peak.

[0048] Figure 15 is a longitudinal sectional right side view of the elevating device showing the state in which the bucket contacts the peak.

[0049] Figure 16 is a longitudinal sectional right side view of the elevating device showing the state in which the bucket contacts the peak.

[0050] Figure 17 is a block diagram showing the functions involved in the estimation of the work amount and the threshing control.

[0051] Figure 18 is a diagram showing the setting of the control parameters.

[0052] Figure 19 It is a graph showing the relationship between each of the leakage opening and air volume and the ratio of the amount of secondary treated material returned to the amount of primary treated material recovered.

[0053] Figure 20 This is a side view of the grain bin sidewall of the primary feed sensor in a semi-feed combine harvester.

[0054] Figure 21 This is a top view of the grain bin, which represents the primary feed sensor in a semi-feed combine harvester.

[0055] Figure 22 This is a cross-sectional view of the primary feed sensor in a semi-feeding combine harvester, shown by line IIXII-IIXII.

[0056] Figure 23 This is a cross-sectional view of the primary feed sensor in a semi-feeding combine harvester, showing line IIXIII-IIXIII.

[0057] Figure 24 This is a top view showing the primary feed sensor in a semi-feed combine harvester.

[0058] Figure 25 This is a top view of the grain bin, which represents the primary feed sensor in a semi-feed combine harvester.

[0059] Figure 26 This is a graph showing the test results of the amount of secondary processed materials returned. Detailed Implementation

[0060] The combine harvester mechanism of this invention is capable of properly storing the grains sorted from the threshed crop. Hereinafter, a conventional combine harvester will be used as an example to describe the combine harvester of this embodiment.

[0061] Figure 1 This is a right-side view of a combine harvester. Figure 2 This is a top view of a combine harvester. For ease of understanding, in this embodiment, unless otherwise specified, "front" (or "front") will be used. Figure 1 The direction of the arrow "F" indicates the front (forward) and "backward" in the longitudinal (direction of travel) direction of the aircraft. Figure 1 The direction of arrow "B" indicates the rear of the aircraft in the forward / backward direction (direction of travel). Additionally, "up" ( Figure 1 The direction of the arrow "U" shown) and "down" ( Figure 1 The direction of arrow "D" indicates the vertical position of the aircraft, representing its height relative to the ground. Furthermore, the left-right or lateral direction is the transverse direction of the aircraft (width direction), orthogonal to the front-back direction, i.e., "left" (…).Figure 2 the direction of the arrow "L" shown) and "right" (the direction of the arrow "R" shown) mean the left direction and the right direction of the machine body, respectively. Figure 2

[0062] The combine harvester is equipped with a track-type traveling device 3, a machine body frame 2 supported by the traveling device 3, a cutting section 4 that cuts crops (rice, wheat, soybeans, rapeseed, and various other crops) in a field, a feeder 11, a threshing device 1, a grain tank 12, and a grain discharge device 14.

[0063] The cutting section 4 is provided with a pickup reel 5 that picks up crops, a push-type cutting device 6 that cuts crops in a field, and a auger 7 that feeds the cut crops transversely to the feeder 11. The crops cut by the cutting section 4 are transported to the threshing device 1 by the feeder 11, and are subjected to threshing and sorting processing by the threshing device 1. The sorted processing product subjected to the threshing and sorting processing by the threshing device 1 is stored in the grain tank 12 and is appropriately discharged to the outside of the machine by the grain discharge device 14.

[0064] A driver's section 9 is provided behind the cutting section 4 in a state in which the feeder 11 is arranged transversely, and the driver's section 9 is disposed in a state in which it is biased to the right side of the machine body. The driver's section 9 is covered by a cab 10. An engine compartment ER is provided below the driver's section 9, and an engine E is housed in the engine compartment ER, although not particularly shown, as well as a cooling fan, a radiator, and the like. The power of the engine E is transmitted to the traveling device 3 and the work devices such as the cutting section 4, the threshing device 1, and the like, by a power transmission mechanism, not shown.

[0065] A satellite positioning module 83 is provided in the cab 10. The satellite positioning module 83 receives a signal (including a GPS signal) of a GNSS (Global Navigation Satellite System) from an artificial satellite (not shown) and acquires the position of the vehicle. In addition, in order to supplement the satellite navigation of the satellite positioning module 83, an inertial navigation unit in which a gyro acceleration sensor and a magnetic direction sensor are assembled is assembled to the satellite positioning module 83. In addition, the inertial navigation unit can also be disposed at a different position in the combine harvester from the satellite positioning module 83.

[0066] Next, the configuration of the threshing device 1 will be described using the longitudinal cross-sectional left side view of the threshing device 1 shown in FIG. 2. Figure 3 The threshing device 1 is provided in the machine body frame 2 and is provided with a threshing section 41 that threshes crops using a threshing cylinder 22 and a sorting section 42 that performs swing sorting processing on the threshed processing product. The threshing section 41 is disposed in an upper region in the threshing device 1, and a screen 23 is provided below the threshing section 41, and the sorting section 42 is provided below the screen 23. The sorting section 42 sorts the threshed processing product that leaks from the screen 23 into a sorted processing product that contains grains to be recovered and a discharge product such as waste straw.​

[0067] The threshing section 41 has a threshing chamber 21 surrounded by the left and right side walls, the top plate 53, and the screen 23 of the threshing device 1. The threshing chamber 21 is equipped with a threshing cylinder 22 that performs threshing of the crop by rotation and a plurality of dust delivery valves 53a. The threshing cylinder 22 rotates around the rotation axis core X. The crop delivered by the feeder 11 is thrown into the threshing chamber 21 and is subjected to threshing by the threshing cylinder 22. The crop that rotates in conjunction with the threshing cylinder 22 is moved toward the rear by the delivery action of the dust delivery valves 53a.

[0068] The dust delivery valve 53a is plate-shaped and is provided at a prescribed interval in the front-rear direction on the inner surface (lower surface) of the top plate 53. The dust delivery valve 53a is provided in a posture inclined with respect to the rotation axis core X when viewed from above. Therefore, each dust delivery valve 53a acts to move the cut crop stalks that rotate in the threshing chamber 21 in conjunction with the threshing cylinder 22 toward the rear side. In addition, the dust delivery valve 53a can adjust the inclination angle with respect to the rotation axis core X. The speed at which the crop is delivered toward the rear within the threshing cylinder 22 is determined in accordance with the inclination angle of the dust delivery valve 53a. In addition, the threshing efficiency with which the crop is threshed is also affected by the speed at which the crop is delivered within the threshing cylinder 22. As a result, the processing capacity with which the crop is threshed can be adjusted using various means, but changing the inclination angle of the dust delivery valve 53a can be used as one means to adjust. Although not particularly shown, a dust delivery valve control mechanism that can change the inclined posture of the dust delivery valve 53a is provided, and the inclination angle of the dust delivery valve 53a can be automatically changed.

[0069] The threshing device 1 is equipped with a primary processing material recovery section 26, a secondary processing material recovery section 27, and a secondary processing material return device 32. The sorting section 42 includes a swing sorting device 24 having a screening housing 33 and an air separator 19.

[0070] The winnower 19 is provided in a lower region of a front region of the sorting section 42, and generates sorting air in a conveying direction of the threshed material from a front side of the swing sorting device 24 toward the rear. The sorting air has an effect of sending waste straw and the like, which has a relatively low specific gravity, toward the rear side of the screening housing 33. In addition, in the swing sorting device 24, the screening housing 33 is swung by the swing drive mechanism 43, so that the threshed material inside the screening housing 33 is conveyed toward the rear while being subjected to the swing sorting process. For this reason, in the following description, in the swing sorting device 24, the upstream side of the conveying direction of the threshed material is referred to as the front end or the front side, and the downstream side is referred to as the rear end or the rear side. In addition, the winnower 19 can change the strength (air volume, air speed) of the sorting air. If the sorting air is increased, the threshed material is easily sent toward the rear, and the sorting speed becomes high. In contrast, if the sorting air is decreased, the threshed material stays in the screening housing 33 for a long time, and the sorting accuracy becomes high. Therefore, the winnower 19 can adjust the sorting efficiency (sorting accuracy, sorting speed) of the swing sorting device 24 by changing the strength of the sorting air. Although not particularly shown, a winnower control mechanism that can change the strength of the sorting air of the winnower 19 is provided, and the strength of the sorting air of the winnower 19 can be automatically changed.

[0071] The first grain screen 38 is provided in the front half of the screening housing 33, and the second grain screen 39 is provided in the rear half of the screening housing 33. Since it is a general configuration, it is not particularly described, but in the screening housing 33, in addition to the first grain screen 38 and the like, a grain shaking plate and a grain screen 40 are provided. The threshed material that leaks from the screen 23 falls to the first grain screen 38 and the second grain screen 39. The majority of the threshed material leaks from the screen 23 to the front half of the screening housing 33 including the first grain screen 38, and is coarsely sorted and finely sorted by the front half of the screening housing 33. A part of the threshed material leaks from the screen 23 to the second grain screen 39, or is conveyed to the second grain screen 39 without leaking downward from the first grain screen 38, leaks in the second grain screen 39, and is sorted.

[0072] The grain screen 40 described above is provided below the first grain screen 38. That is, the swing sorting device 24 is provided with the grain screen 40 provided below the first grain screen 38. The grain screen 40 is configured of a punched metal, a mesh body, or the like, and catches the threshed material that leaks from the first grain screen 38 and performs leak-down sorting.

[0073] A primary treatment material recovery section 26 of a screw type is provided below the front half of the screening housing 33, and a secondary treatment material recovery section 27 of a screw type is provided below the rear half of the screening housing 33. The primary treatment material, which is the treatment material that has fallen through the front half of the screening housing 33, i.e., the primary treatment material among the treatment materials that have been sorted by the sorting section 42, is recovered by the primary treatment material recovery section 26 and is transported toward the side (right side in the machine body left-right direction) of the grain tank 12. The secondary treatment material, which is the treatment material that has fallen through the rear half (second chaff screen 39) of the screening housing 33 (generally, the sorting precision is low, and the ratio of cut stalks and the like is high), i.e., the secondary treatment material among the treatment materials, is recovered by the secondary treatment material recovery section 27. The secondary treatment material corresponds to the threshing treatment material that has not been sorted as the treatment material by the sorting section 42. The secondary treatment material recovered by the secondary treatment material recovery section 27 is returned to the front of the sorting section 42 by the secondary treatment material return device 32 and is sorted again by the screening housing 33.

[0074] The first chaff screen 38 is provided with a plurality of plate-shaped chaff lips arranged in the direction of movement (front-rear direction) of the threshing treatment material. Each chaff lip is disposed in a tilted posture that is tilted more upward as it is toward the rear end side. The tilt angle of the chaff lip is variable, and the more steep the tilt angle, the wider the interval between the adjacent chaff lips, and the easier the threshing treatment material falls through. That is, the opening degree at which the treatment material falls through can be changed by changing the posture of the plurality of chaff lips. Therefore, by adjusting the tilt angle of the chaff lip, the sorting efficiency (sorting precision, sorting speed) of the swing sorting device 24 can be adjusted. A lip control mechanism that changes the tilt posture of the chaff lip of the first chaff screen 38 is provided, and the tilt angle of the chaff lip can be automatically changed.

[0075] The second chaff screen 39 is also configured the same as the first chaff screen 38. An angle control mechanism that changes the tilt posture of the chaff lip of the second chaff screen 39 is also provided, and the tilt angle of the chaff lip can be automatically changed.

[0076] Figure 4 is a front view of the grain tank 12, the threshing device 1, and the grain elevator 29, Figure 5 is a longitudinal sectional right side view of the grain elevator 29. As Figure 4 and Figure 5As shown, a grain elevating device 29 is provided which transports the sorted processed material recovered by the primary processed material recovery section 26 to the grain tank 12. The grain elevating device 29 is disposed between the threshing device 1 and the grain tank 12, and is erected in an attitude along the vertical direction. The grain elevating device 29 is composed of a bucket conveyor type conveying mechanism. The sorted processed material elevated by the grain elevating device 29 is delivered to a lateral feed conveyor device 30 at the upper end portion of the grain elevating device 29. The lateral feed conveyor device 30 is connected to the grain elevating device 29 in an adjacent state. The lateral feed conveyor device 30 is configured as a screw conveyor type, and is sunk into the interior of the grain tank 12 from the wall portion of the left side of the front portion of the grain tank 12. The lateral feed conveyor device 30 has a screw portion 30S which rotates around a body lateral axis Yl. A grain discharge device 30A is provided at the end portion of the tank interior side of the lateral feed conveyor device 30. The grain discharge device 30A has a plate-shaped discharge rotating body 30B which rotates integrally with the screw portion 30S. The sorted processed material (grain) is conveyed laterally by the lateral feed conveyor device 30, and is finally thrown into the grain tank 12 by the grain discharge device 30A. That is, the lateral feed conveyor device 30 receives the grain conveyed by the grain elevating device 29 and conveys it laterally, and discharges it into the grain tank 12. The grain elevating device 29 and the lateral feed conveyor device 30 are the "conveying device" of the present application. In addition, the grain elevating device 29 is the "vertical conveying portion" of the present application, and the lateral feed conveyor device 30 is the "lateral conveying portion" of the present application. Further, the screw portion 30S is the "screw" of the present application.

[0077] In the grain elevating device 29, as shown in FIG. 2, a plurality of buckets 31 are installed at regular intervals at the outer peripheral side of the endless rotating chain 29C wound around the driving sprocket 29A and the driven sprocket 29B. That is, the grain elevating device 29 has a plurality of buckets 31 which elevate the grain obtained by the threshing device 1. The bucket 31 is the "throwing portion" of the present application. The grain elevating device 29 has a conveying path 29D (the "conveying path" of the present application) in which the bucket 31 in which the sorted processed material is accommodated is raised, and a return path 29E in which the bucket 31 is lowered after the sorted processed material is discharged to the lateral feed conveyor device 30. The conveying path 29D and the return path 29E are arranged in alignment along the left side wall 12b of the grain tank 12 in a manner such that the conveying path 29D is on the rear side. Figure 4 Figure 5 In the grain elevating device 29, as shown in FIG. 2, a plurality of buckets 31 are installed at regular intervals at the outer peripheral side of the endless rotating chain 29C wound around the driving sprocket 29A and the driven sprocket 29B. That is, the grain elevating device 29 has a plurality of buckets 31 which elevate the grain obtained by the threshing device 1. The bucket 31 is the "throwing portion" of the present application. The grain elevating device 29 has a conveying path 29D (the "conveying path" of the present application) in which the bucket 31 in which the sorted processed material is accommodated is raised, and a return path 29E in which the bucket 31 is lowered after the sorted processed material is discharged to the lateral feed conveyor device 30. The conveying path 29D and the return path 29E are arranged in alignment along the left side wall 12b of the grain tank 12 in a manner such that the conveying path 29D is on the rear side.

[0078] Configuration of primary processed material sensor

[0079] ​A primary treatment material sensor 60 is provided between the grain elevator 29 and the cross feed conveyor 30. The primary treatment material sensor 60 is a "flow measuring device" of the present application. The primary treatment material sensor 60 is disposed at the upper end of the grain elevator 29 so as to measure the amount of the sorting treatment material which is handed over from the bucket 31 to the cross feed conveyor 30. The primary treatment material sensor 60 measures the flow Fvl of the grain which is conveyed by the grain elevator 29 and the cross feed conveyor 30 (refer to Figure 17 ). The primary treatment material sensor 60 is provided with an arm portion 63 which swings in contact with the conveyed grain, a first sensor portion 64 (a "sensor portion" of the present application), and a first flow calculating portion 81A (refer to Figure 17 , a "calculating portion" of the present application). The first sensor portion 64 detects the swing angle θl of the arm portion 63 (refer to Figure 8 , Figure 9 , Figure 17 ). The first flow calculating portion 81A calculates the flow Fvl on the basis of the detected swing angle θl.

[0080] As shown in Figure 5 , the bucket 31 moves upward along the conveying path 29D, the grain is loaded in the bucket 31, and the grain is conveyed from the primary treatment material recovery portion 26 to the upper end of the grain elevator 29. A discharge port 29h is formed at the upper end of the grain elevator 29. The discharge port 29h is provided at the side portion of the side opposite to the conveying path 29D in the side portion of the return path 29E at the upper end of the grain elevator 29. At the upper end of the grain elevator 29, the bucket 31 is inverted in posture from the ascending posture to the descending posture when the bucket 31 moves from the conveying path 29D to the return path 29E. At this time, the bucket 31 performs a 180-degree (or substantially 180-degree) turning action around the rotation axis core of the driven sprocket 29B, and a centrifugal force acts on the grain loaded in the bucket 31. Then, in the discharge port 29h, the bucket 31 throws the grain at the time of the turning action. In other words, the bucket 31 which is inverted in posture from the ascending posture to the descending posture at the upper end of the grain elevator 29 throws the grain in the discharge port 29h. The upper end of the grain elevator 29, i.e., the upper end of each of the conveying path 29D and the return path 29E is covered by the ceiling 61. In addition, the cross feed conveyor 30 is connected to the discharge port 29h. That is, the handover space of the grain elevator 29 and the cross feed conveyor 30 is formed outside the discharge port 29h and above the cross feed conveyor 30. If the grain is thrown from the bucket 31, the grain is thrown to the cross feed conveyor 30 while describing a parabola in the space below the ceiling 61.

[0081] As shown in Figure 5 , Figure 6 , and Figure 7As shown, the top plate 61 in the grain elevator 29 is provided with a bulging portion 65. The bulging portion 65 is bulged upward more than the surface portion of the top plate 61, and an internal space 62 is formed in the inside of the bulging portion 65. The primary treatment material sensor 60 is supported to the bulging portion 65. The primary treatment material sensor 60 measures the flow rate Fvl of the grains thrown from the bucket 31. The primary treatment material sensor 60 is equipped with an arm portion 63, a first sensor portion 64, and a rotating shaft 66.

[0082] The rotating shaft 66 is supported to the bulging portion 65. The arm portion 63 is attached to the rotating shaft 66 so as to be able to rotate integrally with the rotating shaft 66. The arm portion 63 extends and projects downward from the rotating shaft 66. The arm portion 63 is supported so as to be able to swing around the swing shaft core Y2 of the rotating shaft 66.

[0083] The arm portion 63 is located on the throwing path (throwing path region Sl) of the grains thrown from the bucket 31, and swings by contacting the grains thrown by the bucket 31. The arm portion 63 is disposed in a hanging posture in which the discharge port 29h is opposed in a state where the arm portion 63 is not contacted by the grains, and is configured to be shorter than the up-and-down length of the discharge port 29h. The bulging portion 65 is formed so that the portion of the bulging portion 65 located directly above the rotating shaft 66 becomes the highest position. In addition, an inclined surface 65a is formed in the front portion of the body of the bulging portion 65, and the closer to the front side of the body the inclined surface 65a is, the closer to the top plate 61. In addition, in order to easily understand the inclined surface 65a of the arm portion 63, Figure 6 only the front lower side portion of the inclined surface 65a is shown.

[0084] A flange portion 65b is formed in the left side of the body of the bulging portion 65, and a brace 67 is connected to the flange portion 65b by a bolt Bo. When viewed from above, the length direction central region of the brace 67 projects more to the side away from the bulging portion 65 than the length direction both end portions of the brace 67. The first sensor portion 64 is supported in the length direction central region of the brace 67. The first sensor portion 64 is located outside the grain elevator 29 across the flange portion 65b of the bulging portion 65. That is, the first sensor portion 64 is disposed in a state where it is divided from the throwing path region Sl of the grains thrown from the bucket 31 in a position deviated from the throwing path region Sl.

[0085] A through hole is formed in the flange portion 65b of the bulge 65, through which the rotating shaft 66 passes. A connecting arm 66A is provided at the end of the rotating shaft 66 on the side opposite to the side where the arm portion 63 is located, separated from the flange portion 65b of the bulge 65. The connecting arm 66A extends radially outward from the rotating shaft 66. Additionally, a through hole is formed in the central region along the length of the support bar 67, through which the rotating shaft portion 64A of the first sensor portion 64 passes. A connecting arm 64B is connected to the front end of the rotating shaft portion 64A of the first sensor portion 64, extending radially outward. The connecting arm 66A and the connecting arm 64B are connected by a pin. Thus, the arm portion 63, which rotates integrally with the rotating shaft 66, and the first sensor portion 64 are movably connected via the connecting arm 66A, the connecting arm 64B, and the pin 99. Compared to a configuration where the first sensor unit 64 is directly connected to the rotating shaft 66, this configuration makes the first sensor unit 64 less susceptible to impacts from the arm 63, and thus less prone to malfunction. The first sensor unit 64 detects the swing angle θ1 of the arm 63 (refer to...). Figure 17 Additionally, it is equipped with a first flow calculation unit 81A that calculates the flow rate Fv1 based on the swing angle θ1 (see reference). Figure 17 For example, a mapping diagram and formula representing the relationship between the swing angle θ1 and the flow rate Fv1 are pre-stored in the first flow rate calculation unit 81A. The mapping diagram and formula representing the relationship between the swing angle θ1 and the flow rate Fv1 are obtained in advance through experiments and calculations (either experiments or calculations). Then, the first flow rate calculation unit 81A calculates the flow rate Fv1 based on the mapping diagram and formula.

[0086] An elongated hole is formed on one side of the connecting arm 66A and the connecting arm 64B, and a round hole is formed on the other side. The elongated hole extends along the length of the elongated hole. Furthermore, the connecting arm 66A and the connecting arm 64B are pin-connected by inserting a pin 99 into the elongated hole on one side and the round hole on the other. Because an elongated hole is formed on one side of the connecting arm 66A and the connecting arm 64B, centering errors in the pin connection are allowed. With this configuration, it is not necessary to precisely align the rotating shaft of the first sensor section 64 with the rotating shaft 66 on the same axis, making the assembly of the first sensor section 64 in the primary processing sensor 60 easier.

[0087] Insertion holes for inserting bolts Bo are formed at the left and right ends of the support bar 67. The diameter of the insertion holes is larger than the nominal diameter of bolt Bo (for example, about 3 mm larger than the nominal diameter) and smaller than the diameter of the head of bolt Bo. With this configuration, the alignment of the first sensor part 64 relative to the rotation shaft part of the rotation shaft 66 becomes easier. That is, the assembly of the first sensor part 64 in the primary processing sensor 60 becomes easier.

[0088] A spring support 67a is provided on the support bar 67. A coil spring 68 is tensioned across the free end of the connecting arm 66A and the spring support 67a. The arm 63 is swung by the tension of the coil spring 68 to approach the winnowing device 29. The area on the swing base end side of the arm 63 abuts against the locking part 69, overcoming the spring force of the coil spring 68 and maintaining a downward standby position. With the arm 63 abutting against the locking part 69 and the force of the coil spring 68 acting on the arm 63, even if vibrations caused by unevenness in the field or vibrations from the engine are transmitted to the arm 63, the arm 63 remains in a downward standby position with almost no impact from the vibrations.

[0089] With the above configuration, the arm 63 is configured to swing within a range from the lower front end of the inclined surface 65a in a downward orientation position. In this case, the swing angle θ1 of the arm 63 is set to, for example, 40 degrees.

[0090] A receiving portion 30d is formed at the beginning of the conveying direction of the cylindrical shell covering the spiral portion 30S in the transverse feed conveyor 30. The receiving portion 30d receives grains thrown from the bucket 31. The receiving portion 30d extends and protrudes from the spiral portion 30S of the transverse feed conveyor 30 towards the side where the winnowing device 29 is located. The receiving portion 30d is inclined in such a way that it is located further down the closer it is to the side where the spiral portion 30S is located.

[0091] like Figure 5 As shown, in a side view of the machine body, the area where the extended protruding front end of the bearing part 30d is located is indicated by the virtual line L1, and the arm part 63 is positioned on the side of the lateral feed conveyor 30S located closer to the virtual line L1. Furthermore, in a side view of the machine body, the portion of the lateral shaft Y1 of the lateral shaft Y1 of the lateral shaft Y1 is indicated by the virtual line L2, and the arm part 63 is positioned on the side of the winnowing device 29 located closer to the virtual line L2, extending downwards without being struck by grains. That is, the arm part 63 is positioned in the area between the virtual lines L1 and L2, extending downwards without being struck by grains. In other words, the arm part 63 is configured to oscillate around the swing shaft Y2 located between the discharge outlet 29h and the lateral shaft Y1 within the junction space between the winnowing device 29 and the lateral feed conveyor 30, at a position higher than the lateral shaft Y2 and in a direction adjacent to the winnowing device 29 and the lateral feed conveyor 30.

[0092] If a grain collides with arm 63, it will fall downwards due to the repulsive force from arm 63. Therefore, grains that collide with arm 63 are more likely to fall onto return path 29E compared to grains that do not collide with arm 63. According to this embodiment, arm 63 is positioned on the side where the spiral portion 30S of the lateral feed conveyor 30 is located, beyond the extended protruding end of the receiving portion 30d. Therefore, most of the grains that bounce back after colliding with arm 63 are caught by the receiving portion 30d and guided into the grain bin 12 by the lateral feed conveyor 30. As a result, grains that collide with arm 63 are less likely to fall onto return path 29E.

[0093] The boom 63 is configured such that its width is less than half the width of the bucket 31. In the width direction of the bucket 31, grains are thrown from the bucket 31 approximately evenly, so more than half of the grains thrown from the bucket 31 do not collide with the boom 63 but are caught by the receiving part 30d. As a result, the risk of grains being bounced back by the boom 63 and falling into the return path 29E is reduced. That is, the lateral width of the boom 63 is set to be narrower than the lateral width of the opening of the bucket 31.

[0094] Furthermore, the arm 63 is positioned so that it extends downwards without being struck by the grains, on the side closer to the winnowing device 29 than the virtual line L2. Therefore, compared to a configuration where the arm 63 is positioned on the opposite side from the winnowing device 29 than the virtual line L2, the grains impact the arm 63 more forcefully. Consequently, even if the amount of grains thrown from the bucket 31 is small, the primary feed sensor 60 can accurately measure the grain flow rate Fv1.

[0095] like Figure 8 as well as Figure 9 As shown, when grains are thrown from the bucket 31, they form a continuous vertical strip, falling in a parabolic trajectory toward the side where the receiving part 30d is located. The arm 63 is located on the throwing path of the grains (throwing path area S1), and the upper grains in the continuous vertical strip of grains contact the arm 63. When a grain thrown from the bucket 31 contacts the arm 63, the arm 63, through this pressing force, overcomes the force of the coil spring 68 and swings away from the bucket 31 where the grain was thrown. The grain that collides with the arm 63 falls downward due to the repulsive force from the arm 63, is caught by the receiving part 30d, and guided toward the side where the spiral part 30S is located. The swinging base of the arm 63 is offset upwards beyond the throwing path area S1 of the grains. That is, the arm 63 is configured to swing around a swinging axis Y2 located at a position offset from the throwing path area S1 of the grains thrown from the bucket 31.

[0096] exist Figure 5The diagram shows a virtual line L3. Virtual line L3 extends downwards from the swing axis Y2 and intersects the upper line of the throwing path region S1 in a direction orthogonal to it. The free end of the arm 63, extending downwards without being struck by the grain, is located on the side closer to virtual line L2 than virtual line L3. Therefore, the more the arm 63 swings towards the side where virtual line L2 is located, the more of the arm 63 extends beyond the throwing path region S1. That is, the arm 63 is configured such that the larger the swing angle θ1, the greater the proportion extending beyond the throwing path region S1.

[0097] like Figure 8 As shown, if a grain is thrown from the bucket 31 and comes into contact with the arm 63, the arm 63 swings. Then, if most of the grain thrown from the bucket 31 passes through the area where the arm 63 is located, the arm 63 returns to its downward orientation by the force of the coil spring 68. In this embodiment, 20 to 30 buckets 31 pass the upper end of the winnowing device 29 per second, and grains are thrown from the bucket 31 at intervals of 1 / 20 to 1 / 30 of a second at the discharge port 29h. Therefore, the arm 63 swings (vibrates) at a period of 1 / 20 to 1 / 30 of a second.

[0098] exist Figure 9 In the example shown, with Figure 8 Compared to the example shown, the amount of grains thrown from bucket 31 increases. With an increased amount of grains thrown from bucket 31, the thrown grains become lumpy and thicker at the discharge outlet 29h. As the amount of grains thrown from bucket 31 increases, the swing angle θ1 of arm 63 becomes larger. Furthermore, because the grains become lumpy and thicker at the discharge outlet 29h, the time required for the lumpy grains to pass through the throwing path region S1 increases. Therefore, the time for arm 63 to return to the downward-facing side is almost negligible, and the swing angle θ1 remains relatively large.

[0099] When the arm 63 abuts against the lower front end of the inclined surface 65a, the swinging of the arm 63 stops. In other words, the abutment of the arm 63 against the lower front end of the inclined surface 65a maximizes the distance the arm 63 swings. In this state, the arm 63, except for its free end, is substantially housed within the internal space 62. At this time, the grains thrown in a parabolic shape along the inner circumferential side of the top plate 61 only contact the free end of the arm 63, so most of the grains do not contact the arm 63 but are guided by the receiving part 30d of the transverse feed conveyor 30.

[0100] [Composition of the sensor for secondary processed materials]

[0101] As described above, the secondary processed material is returned by the secondary processed material return device 32 to the upstream side of the front part of the oscillating sorting device 24. Specifically, the secondary processed material discharge port 32A of the secondary processed material return device 32 is located at a radially outer position in the arc-shaped screen 23 (to the side of the screen 23, and at a position where the secondary processed material does not pass through the screen 23), and the secondary processed material is discharged at this position. The threshing device 1 is equipped with a device for measuring the flow rate Fv2 (secondary processed material return amount, refer to...) of the returned secondary processed material. Figure 17 ) secondary processing material sensor 70. Figure 10 to Figure 13 The configuration of this secondary treatment waste discharge port 32A is shown in the figure.

[0102] In this embodiment, such as Figure 10 As shown, the secondary treated material discharge port 32A is positioned facing the screen 23. Figure 11 as well as Figure 12 As shown, a rotating blade 32B, which rotates together with the screw constituting the secondary processing return device 32, is provided near the secondary processing material discharge port 32A. The secondary processing material conveyed by the secondary processing material return device 32 is discharged radially outward from the secondary processing material discharge port 32A through an insertion hole formed in the side wall 50 of the threshing section 41 by the rotating blade 32B. Figure 12 It is discharged as shown by the dashed arrow.

[0103] A guide portion 32C is provided at the secondary processing outlet 32A to guide the discharged secondary processing material upstream in the processing direction of the oscillating sorting device 24. The guide portion 32C is shaped to have a cylindrical portion having an inner circumferential surface opposite to the secondary processing outlet 32A. In other words, the guide portion 32C is shaped to bend the belt into an arc shape. The inner circumferential surface of this guide portion 32C restricts the discharge direction of the secondary processing material discharged by the rotating blade 32B.

[0104] like Figure 11 as well as Figure 12 As shown, the secondary processed material sensor 70 is supported on the inner side portion of the sidewall 50 in the threshing section 41. The secondary processed material sensor 70 is configured to contact the secondary processed material discharged by the rotating blade 32B in the secondary processed material return device 32 to measure the flow rate Fv2 of the returned secondary processed material. The secondary processed material sensor 70 includes: a swing arm 72 located on the discharge extension line of the secondary processed material discharged by the secondary processed material return device 32, which swings upon contact with the discharged secondary processed material; based on the swing angle θ2 of the swing arm 72 (refer to...). Figure 17 The system includes a second sensor unit 73 for measuring the flow rate Fv2 of the secondary processed material; a support frame 74 for supporting the second sensor unit 73 and the swing arm 72; and a cover 75 covering the upper part of the secondary processed material sensor 70.

[0105] The second sensor unit 73 houses a potentiometer within its housing and is bolted to the inner side of the support frame 74. Regarding the second sensor unit 73, a rotating shaft 76 is provided, protruding outwards (towards the sidewall 50) through the support frame 74. A swing arm 72 is integrally rotatably mounted on the rotating shaft 76. The swing arm 72 extends downwards from the rotating shaft 76, positioned within the guide path of the secondary processed material guided by the guide portion 32C. The swing arm 72 is supported so that it can swing about the axis of the rotating shaft 76.

[0106] The cover 75 is configured to cover the top of the swing arm 72, the second sensor unit 73, and the support frame 74. By using the cover 75, it is possible to prevent fine dust from the threshed material that has leaked through the screen 23 from falling onto the swing arm 72 and the second sensor unit 73 and thus hindering the measurement operation.

[0107] like Figure 13 As shown, the swing arm 72 has an extension protrusion that extends upward beyond the rotation shaft 76, and a coil spring 78 is tensioned across the extension protrusion and the spring support portion 77. Under the tension force of the coil spring 78, the swing arm 72 is forced to swing in a manner close to the secondary processing outlet 32A. The upper end of the swing arm 72 abuts against the locking portion 79, thereby overcoming the spring force and being held in a downward standby position.

[0108] If the secondary processed material discharged by the rotating blade 32B through the secondary processed material discharge port 32A contacts the swing arm 72, under its pressure, the swing arm 72 overcomes the force of the coil spring 78 and swings away from the secondary processed material discharge port 32A. The swing angle θ2 at this time is measured by the second sensor unit 73, and the second flow calculation unit 81B (refer to...) Figure 17 The flow rate Fv2 of the secondary processed material is calculated based on the measurement results of the second sensor unit 73. Specifically, it is preferable to store a mapping diagram and formula representing the relationship between the swing angle θ2 and the flow rate Fv2 of the secondary processed material in the second flow calculation unit 81B, and calculate the flow rate Fv2 of the secondary processed material based on the mapping diagram and formula.

[0109] [The composition of the protrusions in the bucket contact area]

[0110] about Figure 5 The details of peak 30e shown are based on Figure 14 , Figure 15 as well as Figure 16An explanation will be given. As described above, in the discharge port 29h, the scoop 31 discharges the grain while performing a 180-degree (or substantially 180-degree) swing action around the rotation axis core of the driven sprocket 29B. However, for example, there is a concern that the grain sticks to the inside of the scoop 31. The grain that sticks to the inside of the scoop 31 has a concern that it cannot be discharged from the scoop 31 by the swing action of the scoop 31 alone. Therefore, if the grain sticks to the inside of the scoop 31, there is a concern that it leads to a decrease in the conveying efficiency of the grain elevator 29, a loss in the yield of the grain, and the like. In order to reduce such an undesirable situation, a rubber-made protuberance 30e is bolt-coupled to the protruding front end portion of the receiving portion 30d. The protuberance 30e is positioned so as to come into contact with the scoop 31. Upon the impact of the protuberance 30e coming into contact with the scoop 31, the grain remaining in the scoop 31 is ejected and guided toward the receiving portion 30d. Then, if the scoop 31 moves downward, the scoop 31 swings upward while the protuberance 30e elastically deforms downward. If the scoop 31 further moves downward in the return path 29E, the protuberance 30e separates from the scoop 31. At this time, the elastic energy of the protuberance 30e is released, and the protuberance 30e recovers to the original shape with a strong momentum. In addition, also at the time when the scoop 31 separates from the protuberance 30e, the impact caused by the elastic energy of the protuberance 30e is transmitted to the scoop 31, and the grain remaining in the scoop 31 is ejected and falls downward. The grain that falls downward is returned along the return path 29E toward the once-processed material recovery portion 26. With this configuration, it is possible to reduce the concern that the grain sticks to the inside of the scoop 31.

[0111] 〔Calculation of the work amount〕

[0112] The calculation of the work amount is based on Figure 17 An explanation will be given. The first flow rate calculation portion 81A calculates the flow rate Fv1 of the grain flowing through the grain elevator 29 and the cross-feed conveyor 30 based on the swing angle θ1 of the arm portion 63 measured by the first sensor portion 64. The correlation between the swing angle θ1 and the flow rate Fv1 of the grain is obtained, for example, by experimental data, a learning algorithm, or the like. The data of the correlation between the swing angle θ1 and the flow rate Fv1 of the grain obtained by the experimental data, the learning algorithm, or the like is stored in a storage device (not shown), or the like. In the present embodiment, the first flow rate calculation portion 81A can calculate the flow rate Fv1 of the grain at a sampling period of, for example, 1 / 20 to 1 / 30 of a second. Therefore, the first flow rate calculation portion 81A can calculate the flow rate Fv1 of the grain flowing through the grain elevator 29 and the cross-feed conveyor 30 in real time (or substantially in real time).

[0113] The second flow rate calculating section 81B calculates the flow rate Fv2 of the secondary treatment material discharged from the secondary treatment material discharge port 32A on the basis of the swing angle θ2 of the swing arm 72 measured by the second sensor section 73. The correlation between the swing angle θ2 and the flow rate Fv2 of the secondary treatment material is obtained, for example, by experimental data, a learning algorithm. Data of the correlation between the swing angle θ2 and the flow rate Fv2 of the secondary treatment material obtained by the experimental data, the learning algorithm is stored in a storage device (not shown) or the like. Like the first flow rate calculating section 81A, the second flow rate calculating section 81B can calculate the flow rate Fv2 of the secondary treatment material discharged from the secondary treatment material discharge port 32A in real time (or substantially in real time).

[0114] The yield accepting section 85 accepts a specific yield value Vd. As the specific yield value Vd, a yield value corresponding to a known capacity of the grain tank 12, a yield value corresponding to a capacity (or a remaining amount) that the transport vehicle can transport, a yield value corresponding to a capacity that a dryer of the drying facility can dry, and the like can be exemplified. As for the specific yield value Vd, for example, it can be configured to read the capacity of the grain tank 12 stored in advance in a storage device (not shown) or the like, or it can be configured to be set by an operator on an operation panel of the cab 9. In addition, the specific yield value Vd can also be configured to receive data from the outside through a wireless communication network. The specific yield value Vd accepted by the yield accepting section 85 is sent to the work amount estimating section 84.

[0115] The body position calculating section 88 calculates the position coordinates of the body over time on the basis of the positioning data output by the satellite positioning module 83. That is, the body position calculating section 88 calculates the position of the body using satellite positioning. The calculated position coordinates of the body over time are sent to the work amount estimating section 84.

[0116] The work amount estimating section 84 estimates the total amount of the grain stored in the grain tank 12, that is, the yield Vi in real time by accumulating the flow rate Fv1 of the grain calculated by the first flow rate calculating section 81A. The flow rate Fv1 of the grain is, for example, sequentially sent from the first flow rate calculating section 81A every 1 / 20 to 1 / 30 of a second, so the work amount estimating section 84 can calculate the average yield Vt per unit time on the basis of the flow rate Fv1 of the grain.

[0117] In addition, the work amount estimating section 84 receives the position coordinates of the body over time calculated by the body position calculating section 88, so it can calculate the distance traveled and the speed by calculating the difference in the position coordinates of the body over time. Therefore, the work amount estimating section 84 can calculate the average yield Vr per unit distance traveled on the basis of the flow rate Fv1 of the grain.

[0118] Further, the work amount calculating section 84 calculates various work amounts based on the specific yield value Vd, the flow rate Fvl of the grain, and the position coordinates of the machine body calculated by the machine body position calculating section 88. In the present embodiment, the various work amounts are work amounts until the grain corresponding to the specific yield value Vd is stored in the grain tank 12. For example, if the specific yield value Vd is the capacity of the grain tank 12, the work amount calculating section 84 calculates a work amount until the grain tank 12 is filled. Also, for example, if the specific yield value Vd is the capacity (or the remaining amount) that can be transported by the transport vehicle, the work amount calculating section 84 calculates a work amount corresponding to the capacity (or the remaining amount) that can be transported by the transport vehicle.

[0119] As a specific example, the work amount calculating section 84 calculates a remaining amount value Vre as the work amount by the following equation.

[0120] Vre = Vd - Vi

[0121] The remaining amount value Vre is a value obtained by subtracting the yield Vi from the specific yield value Vd. Also, the work amount calculating section 84 calculates a work time Tw as the work amount by the following equation.

[0122] Tw = Vre / Vt

[0123] The work time Tw is a value obtained by dividing the remaining amount value Vre, which is obtained by subtracting the yield Vi from the specific yield value Vd, by the average yield Vt per unit time. In addition to this, the work amount calculating section 84 calculates a work travel distance Dw as the work amount by the following equation.

[0124] Dw = Vre / Vr

[0125] The work travel distance Dw is a value obtained by dividing the remaining amount value Vre, which is obtained by subtracting the yield Vi from the specific yield value Vd, by the average yield Vr per unit travel distance. In this way, the work amount calculating section 84 calculates a work amount required to reach the specific yield value Vd by the yield Vi of the grain obtained by the harvesting work based on the flow rate Fvl of the grain.

[0126] The work amount (for example, the remaining amount value Vre, the work time Tw, the work travel distance Dw, and the like) calculated by the work amount calculating section 84 is reported to the operator or the like by the reporting section 87. In the case where the reporting section 87 is, for example, a liquid crystal monitor provided in the driver section 9, the calculation results of the first flow rate calculating section 81A and the work amount calculating section 84 are each displayed on the liquid crystal monitor. Also, the reporting section 87 can be an LED lamp, a buzzer, a voice guide, or the like.

[0127] If the screw conveyor 14A of the grain discharging device 14 rotates, the grain stored in the grain tank 12 is discharged to the outside. The discharge amount calculating section 86 calculates the amount of the grain discharged from the grain tank 12 on the basis of the rotational speed Rv of the screw conveyor 14A of the grain discharging device 14. In the present embodiment, the rotational speed Rv of the screw conveyor 14A is detected by the rotational speed detecting section 14B. The discharge amount of the grain per unit time discharged by the grain discharging device 14 is in a proportional relationship (or substantially proportional relationship) with the rotational speed Rv of the screw conveyor 14A. Therefore, by multiplying the rotational speed Rv of the screw conveyor 14A by time, the discharge amount of the grain is calculated in real time. The yield Vi of the grain stored in the grain tank 12 is calculated by the work amount calculating section 84 before the grain is discharged to the outside. Therefore, the discharge amount calculating section 86 can also subtract the cumulative discharge amount from the yield Vi in the discharge of the grain, thereby calculating the remaining amount of the grain remaining in the inside of the grain tank 12 in real time. The result of the calculation of the discharge amount calculating section 86 is reported to the operator or the like by the reporting section 87. In the case where the reporting section 87 is a liquid crystal monitor, the result of the calculation of the discharge amount calculating section 86 is displayed on the liquid crystal monitor.

[0128] The grain stored in the grain tank 12 is liable to be accumulated in a mountain shape, but according to the present configuration, the flow rate Fvl of the grain is detected by the primary work material sensor 60 between the grain elevating device 29 and the lateral feed conveying device 30. With the configuration in which the flow rate Fvl of the grain is detected by the primary work material sensor 60 between the grain elevating device 29 and the lateral feed conveying device 30, the work amount can be calculated with high accuracy regardless of the accumulation shape of the grain in the inside of the grain tank 12.

[0129] 〔Determination of control parameters〕

[0130] As Figure 17The measurement result of the primary treatment object sensor 60 and the measurement result of the secondary treatment object sensor 70 are transmitted to the parameter determining section 80. The parameter determining section 80 determines the control parameter of the threshing device 1 based on the ratio of the secondary treatment object return amount to the primary treatment object recovery amount. The primary treatment object recovery amount is the recovery amount of the primary treatment object shown by the measurement result of the primary treatment object sensor 60, and is the flow rate Fvl of the grain. The secondary treatment object return amount is the return amount of the secondary treatment object shown by the measurement result of the secondary treatment object sensor 70, and is the flow rate of the secondary treatment object. The ratio of the secondary treatment object return amount to the primary treatment object recovery amount is a value obtained by dividing the return amount of the secondary treatment object by the recovery amount of the primary treatment object. Here, the primary treatment object recovery amount and the secondary treatment object return amount are not always obtained as measurement results composed of certain values by the constitution of the primary treatment object sensor 60 and the secondary treatment object sensor 70. Therefore, the parameter determining section 80 can calculate the above ratio using the average value of the primary treatment object recovery amount and the secondary treatment object return amount for a prescribed time, or can calculate the above ratio using the instantaneous value of the primary treatment object recovery amount and the secondary treatment object return amount obtained at a prescribed timing.

[0131] The control parameter of the threshing device 1 is a device setting value that sets the capacity of the threshing device 1, and specifically corresponds to a threshing parameter that sets the threshing capacity of the threshing section 41 provided in the threshing device 1, and a separation parameter that sets the separation capacity of the separation section 42. The threshing parameter that sets the threshing capacity in the threshing section 41 corresponds to a setting value that sets the rotational speed of the rotational shaft 55 of the threshing cylinder 22, and a setting value that sets the installation angle of the dust delivery valve 53a with respect to the top plate 53. In addition, the separation parameter that sets the separation capacity in the separation section 42 corresponds to a setting value that sets the air volume of the separation air from the air separator 19, a setting value that sets the opening degree of the chaffer, a setting value that sets the oscillation speed and the oscillation amount of the oscillation drive mechanism 43 that oscillates the oscillation separation device 24. Furthermore, the amount of the crop cut by the combine harvester can be changed by increasing or decreasing the traveling speed of the body frame 2. Thus, the traveling speed of the body frame 2 is also included in the control parameter.

[0132] The parameter determining section 80 determines by changing the above control parameter so that the separation capacity of the oscillation separation device 24, that is, the proportion of the amount of the primary treatment object recovered by the primary treatment object recovery section 26 to the amount of the treatment object leaked from the screen 23, that is, the separation degree (or the separation efficiency) becomes appropriate.

[0133] As Figure 18As shown, the parameter determining section 80 is preferably configured to, when setting the prescribed control parameter, set a first threshold value and a second threshold value larger than the first threshold value, in advance, for the ratio of the secondary processing material return amount to the primary processing material recovery amount, and set the control parameter within a range between the first threshold value and the second threshold value. Thus, the minimum and maximum values of the control parameter can be set, and therefore the control amount can be ensured.

[0134] Returning Figure 17 The control unit 82 controls the threshing device 1 based on the control parameter. That is, the control unit 82 controls the threshing section 41 and the separating section 42 of the threshing device 1 by the control parameter described above. In the threshing device 1 thus controlled, the primary processing material sensor 60 and the secondary processing material sensor 70 measure the recovery amount and the return amount, respectively, and further, the parameter determining section 80 determines the control parameter, and the control unit 82 controls the threshing device 1. Thus, the control unit 82 performs feedback control based on the measurement results of the primary processing material sensor 60 and the secondary processing material sensor 70, and can set appropriate control parameters corresponding to the working conditions in real time during the harvesting operation of the combine harvester, and can appropriately perform the harvesting operation.

[0135] Specifically, as Figure 19As shown, the greater the ratio of the amount of the secondary processed material returned to the amount of the primary processed material recovered, the greater the opening degree of the chaffer, and the greater the ratio of the amount of the secondary processed material returned to the amount of the primary processed material recovered, the greater the amount of the separating air of the winnower 19. In the case where the ratio of the amount of the secondary processed material returned to the amount of the primary processed material recovered is large, it is possible that a large amount of the material is transported to the rear of the swing separator 24 without being recovered as the primary processed material and without being returned as the secondary processed material. Therefore, in the case where the ratio of the amount of the secondary processed material returned to the amount of the primary processed material recovered is large, by setting the opening degree of the chaffer to be large, the separated material can be easily discharged to the primary processed material recovery section 26 and the secondary processed material recovery section 27, and by increasing the amount of the separating air of the winnower 19, the material other than the separated material can be transported to the rear of the swing separator 24. Thus, it is possible to reduce the tertiary processing loss as the tertiary processed material is transported. On the other hand, in the case where the ratio of the amount of the secondary processed material returned to the amount of the primary processed material recovered is small, it is possible that the separation accuracy is too high, and a large amount of the material is transported to the secondary processed material recovery section 27 without being recovered as the primary processed material in the swing separator 24. Therefore, in the case where the ratio of the amount of the secondary processed material returned to the amount of the primary processed material recovered is small, by setting the opening degree of the chaffer to be large, the separated material can be easily discharged to the primary processed material recovery section 26, and by reducing the amount of the separating air of the winnower 19, it is difficult for the separated material to be transported to the rear of the swing separator 24. Thus, it is easy to be recovered as the primary processed material. In addition, in the case where the ratio of the amount of the secondary processed material returned to the amount of the primary processed material recovered is small, the amount of the separating air of the winnower 19 is reduced, and the material other than the separated material is less likely to be transported to the rear of the swing separator 24. Thus, it is possible to reduce the tertiary processing loss as the tertiary processed material is transported. Figure 19 In the above, the relationship between the opening degree and the ratio of the amount of the secondary processed material returned to the amount of the primary processed material recovered, and the relationship between the amount of the separating air and the ratio of the amount of the secondary processed material returned to the amount of the primary processed material recovered are expressed by the same characteristic, but they can be set to different characteristics from each other, and can be changed for each kind of the crop.

[0136] In addition, depending on the situation, it is assumed that even in the case where the opening degree of the chaffer is large and the amount of the separating air of the winnower 19 is increased, the ratio of the amount of the secondary processed material returned to the amount of the primary processed material recovered does not decrease, but this is because the amount of the crop supplied to the threshing device 1 is too large. Therefore, it is preferable that in the case where the ratio of the amount of the secondary processed material returned to the amount of the primary processed material recovered does not decrease even when the opening degree of the chaffer is large and the amount of the separating air of the winnower 19 is increased, the traveling device 3 reduces the traveling speed of the machine frame 2. Thus, the amount of the crop supplied to the threshing device 1 is reduced, and it is possible to reduce the threshing amount and the separating amount in the threshing device 1, and thus it is possible to appropriately perform the separating process.

[0137] Further, it is preferable that the traveling device 3 stop the body frame 2 when the leakage opening of the chaffer becomes large due to an unexpected reason, the amount of air of the separating air of the air cleaner 19 increases for a predetermined time, the ratio of the amount of the secondary processed material to be returned to the amount of the primary processed material to be recovered does not change, or the traveling speed of the body frame 2 decreases for a predetermined time, the ratio of the amount of the secondary processed material to be returned to the amount of the primary processed material to be recovered does not change. Thus, the supply of the crop to the threshing device 1 can be temporarily interrupted, and thus the load of the threshing process and the separating process in the threshing device 1 can be reduced. Therefore, the process on the crop in the threshing device 1 can be performed at present.

[0138] Further, the reporting section 87 can report when the ratio of the amount of the secondary processed material to be returned to the amount of the primary processed material to be recovered does not change even when the leakage opening of the chaffer becomes large and the amount of air of the separating air of the air cleaner 19 increases. Thus, the operator and the surroundings can be informed that the ratio of the amount of the secondary processed material to be returned to the amount of the primary processed material to be recovered does not change.

[0139] [Other Embodiments]

[0140] The present application is not limited to the configurations illustrated in the above-described embodiments, and representative other embodiments of the present application will be described below.

[0141] (1) In the above-described embodiments, examples in which the combine harvester is a normal combine harvester have been described, but the combine harvester can be a semi-feed combine harvester. The configuration of the primary processed material sensor 60 illustrated in the above-described embodiments can be applied to the semi-feed combine harvester. For example, as illustrated in FIG. 9, the primary processed material sensor 91 can be supported to the top plate 12t of the grain tank 12. Figure 20 to Figure 24 Figure 20 to Figure 24 In the embodiment illustrated in FIG. 10, the grain elevating device 90 extending upward and downward is supported to the left side wall 12b of the grain tank 12. The grain elevating device 90 is the "vertical conveying section" of the present application, and the grain elevating device 90 as the "vertical conveying section" is a part of the "conveying device" of the present application. The screw conveyor 90A is provided to the grain elevating device 90. The screw conveyor 90A is the "vertical screw" of the present application, and elevates the grain obtained by the threshing device 1 while rotating around the rotation axis core Pl oriented upward and downward, and discharges the grain to the grain tank 12. The screw conveyor 90A rotates clockwise when viewed from above. The discharge port 12h is formed at a portion where the upper end of the grain elevating device 90 is present in the left side wall 12b, and the discharge port 12h communicates with the internal space of the grain elevating device 90.

[0142] ​The spiral conveyor 90A vertically conveys the grain from the bottom of the threshing device 1. A rotating blade 90B is provided at the upper end of the spiral conveyor 90A. The rotating blade 90B rotates integrally with the spiral conveyor 90A about the rotation axis core PI. The discharge port 12h is provided at a position where the rotating blade 90B is present.

[0143] In Figure 20 to Figure 24 In the embodiment shown in the drawing, the one-time processing object sensor 91 is provided with an arm portion 92, a sensor portion 93, and a rotation shaft 94. The arm portion 92 is provided inside the grain tank 12. The arm portion 92 is located on the front side in the direction of travel with respect to the rotation axis core PI of the spiral conveyor 90A. If the grain is discharged from the discharge port 12h, some of the grain comes into contact with the arm portion 92, and the arm portion 92 swings. The angle of swing θ1 of the arm portion 92 is measured by the sensor portion 93, and the flow rate Fv1 of the grain is calculated on the basis of the measurement result.

[0144] In Figure 20 to Figure 24 In the embodiment shown in the drawing, a bulging portion 95 is formed in the top plate 12t of the grain tank 12. The bulging portion 95 bulges upward more than the surface portion of the top plate 12t, and a bulging space 95S is formed inside the bulging portion 95. The rotation shaft 94 of the arm portion 92 is supported by the bulging portion 95. With this configuration, the arm portion 92 is supported in a suspended state by the top plate 12t, which is the ceiling of the grain tank 12. The bulging portion 95 is formed so that the portion of the bulging portion 95 that is directly above the rotation shaft 94 is the highest position. In addition, an inclined surface 95a is formed in the front portion of the body of the bulging portion 95, and the inclined surface 95a approaches the top plate 12t more as it approaches the front side of the body.

[0145] In Figure 20 A virtual line L3 is shown in FIG. 6. The virtual line L3 extends downward from the swing axis core Y2 and intersects in a direction orthogonal to the upper end line of the throw path region SI. The free end portion of the arm portion 92 is located on the side opposite the side on which the discharge port 12h is present, in a state in which it extends downward without being struck by the grain. Therefore, the more the arm portion 92 swings toward the side opposite the side on which the discharge port 12h is present, the more of the arm portion 92 extends outside the range of the throw path region SI. That is, the arm portion 92 is configured so that the greater the angle of swing θ1, the greater the proportion of the arm portion 92 that extends outside the throw path region SI. The fact that the greater the angle of swing θ1, the more the arm portion 92 extends further outside the throw path region SI is the same in the embodiment shown in FIG. 7 as well. Figure 21 to Figure 24

[0146] ​If the amount of the primary processed product discharged from the discharge port 12h increases, the arm portion 92 swings upward to a large extent. At this time, the swing base end portion side in the arm portion 92 is positioned on the upper side than the top plate 12t, and is housed in the bulging portion 95. That is, if the amount of the primary processed product discharged from the discharge port 12h increases, the arm portion 92 swings upward to a large extent, and the proportion of the portion in the arm portion 92 in which the grain deviates to the upper side of the throwing path region SI increases. In addition, the more the arm portion 92 swings upward to a large extent, the greater the proportion of the portion in the arm portion 92 that is housed in the bulging portion 95. Therefore, most of the primary processed product does not contact the arm portion 92, but diffuses to the inside of the grain tank 12 along a parabola.

[0147] (2) In Figure 21 to Figure 24 the embodiment shown in the drawing, a flange portion 95b is formed on the left side of the body of the bulging portion 95, and a strut 97 is connected to the flange portion 95b by a bolt Bo. In plan view, the central region in the length direction of the strut 97 protrudes to the side farther from the bulging portion 95 than the both end portions in the length direction of the strut 97. The sensor portion 93 is supported in the central region in the length direction of the strut 97. The sensor portion 93 is positioned on the outside of the grain tank 12 across the flange portion 95b of the bulging portion 95. That is, the sensor portion 93 is provided in a state divided from the throwing path region SI in which the grain thrown from the discharge port 12h deviates, at a position deviating from the throwing path region SI.

[0148] A through hole is formed in the flange portion 95b of the bulging portion 95, and the rotating shaft 94 penetrates the through hole. A link arm 94A is provided at the end portion of the rotating shaft 94 on the side opposite to the side on which the arm portion 92 is positioned across the flange portion 95b of the bulging portion 95, and extends to the radially outer side of the rotating shaft 94. In addition, a through hole is formed in the central region in the length direction of the strut 97, and a rotating shaft portion 93A of the sensor portion 93 penetrates the through hole. A link arm 93B is connected to the front end portion of the rotating shaft portion 93A of the sensor portion 93, and extends to the radially outer side. The link arm 94A and the link arm 93B are connected by a pin 96. Thus, the arm portion 92 and the sensor portion 93 that rotate integrally with the rotating shaft 94 are connected in linkage with the pin 96 via the link arm 94A and the link arm 93B. With this configuration, compared with the configuration in which the sensor portion 93 is directly connected to the rotating shaft 94, the sensor portion 93 is less likely to be impacted by the arm portion 92, and the sensor portion 93 is less likely to malfunction. The sensor portion 93 detects the swing angle θ1 of the arm portion 92 (refer to Figure 17 ).

[0149] An elongated hole is formed on one side of the connecting arm 94A and the connecting arm 93B, and a round hole is formed on the other side. The elongated hole extends along the length of the elongated hole. Furthermore, the connecting arm 94A and the connecting arm 93B are pin-connected by inserting a pin 96 through the elongated hole on one side and the round hole on the other. Because an elongated hole is formed on one side of the connecting arm 94A and the connecting arm 93B, centering errors in the pin connection are allowed. With this configuration, it is not necessary to precisely align the rotating shaft of the sensor section 93 with the rotating shaft 94 on the same axis, making the assembly of the sensor section 93 in the primary processing sensor 91 easier.

[0150] Insertion holes for inserting bolts Bo are formed at the left and right ends of the support bar 97. The diameter of the insertion holes is larger than the nominal diameter of bolt Bo (for example, about 3 mm larger than the nominal diameter) and smaller than the diameter of the head of bolt Bo. With this configuration, the alignment of the sensor section 93 with respect to the rotating shaft of the rotating shaft 94 becomes easier. That is, the assembly of the sensor section 93 in the primary processing sensor 91 becomes easier.

[0151] like Figure 24 As shown, a spring support portion 97a is provided on the support bar 97. A coil spring 98 is tensioned across the free end of the connecting arm 94A and the spring support portion 97a. The arm 92 is oscillated by the tension force of the coil spring 98, causing the free end of the arm 92 to approach the outlet 12h. The area on the oscillating base end side of the arm 92 abuts against the locking portion 95c, overcoming the spring force of the coil spring 98 and maintaining a downward standby position. With the arm 92 abutting against the locking portion 95c and the force of the coil spring 98 acting on the arm 92, even if vibrations caused by unevenness in the field or vibrations from the engine are transmitted to the arm 92, the arm 92 remains in a downward standby position with almost no impact from the vibrations.

[0152] (3) In Figure 21 to Figure 24 In the embodiment shown, a recess Q1 is formed in the middle of the front and rear sides of the left side wall 12b of the grain bin 12. Figure 21 The winnowing device 90 is located in the recessed portion Q1. Additionally, although in Figure 21 Not shown, but a threshing device 1 is provided on the left side of the grain bin 12. The winnowing device 90 is located in the central area of ​​the front and rear of the grain bin 12 in the front-rear direction. Grains thrown from the discharge port 12h are thrown in three directions inside the grain bin 12: in front of the machine body, to the right of the machine body, and to the rear of the machine body.

[0153] A guide member 90C and a guide receiving member 90D are provided at the upper end portion of the grain elevator 90. The guide member 90C and the guide receiving member 90D are supported to the left side wall 12b at the portion where the discharge port 12h is located, respectively. The guide member 90C is curved along the rotational track of the rotary vane 90B, outward of the rotational track of the rotary vane 90B.

[0154] The first guide portion 90e and the second guide portion 90f are formed in the guide member 90C. The second guide portion 90f is located on the front side of the machine body with respect to the first guide portion 90e. The first guide portion 90e is located on the left side of the machine body with respect to the rotary vane 90B, and the second guide portion 90f is located on the front side of the machine body with respect to the rotary vane 90B. In Figure 21 In the first guide portion 90e and the second guide portion 90f, a line L11 is shown as a boundary line. The line L11 is a position where the longitudinal portion 90g of the guide member 90C overlaps in Figure 22 In the first guide portion 90e and the second guide portion 90f, a line L11 is shown as a boundary line. The line L11 is a position where the longitudinal portion 90g of the guide member 90C overlaps in Figure 22 The longitudinal portion 90g in the first guide portion 90e and the second guide portion 90f is a boundary between the first guide portion 90e and the second guide portion 90f.

[0155] The upper and lower widths of the first guide portion 90e are formed wider than the upper and lower widths of the rotary vane 90B, and the first guide portion 90e covers the rotary vane 90B in the upper and lower directions. The front and rear central portions of the first guide portion 90e are curved along the rotational track of the rotary vane 90B. The rear portion of the first guide portion 90e extends in a tangential direction with respect to the outer periphery of the rotational track of the rotary vane 90B, and is inclined so that the further the portion is to the rear side, the more the portion is located to the left and right central sides of the grain tank 12 in plan view. Therefore, the further the portion is to the rear side of the rear portion of the first guide portion 90e, the more the portion is away from the rotational axis core P1.

[0156] The second guide portion 90f is curved so as to extend to the left and right central sides of the grain tank 12 with respect to the first guide portion 90e. The upper and lower widths of the second guide portion 90f are formed narrower than the upper and lower widths of the rotary vane 90B, and the second guide portion 90f covers the lower portion of the rotary vane 90B. Therefore, the front side portion of the discharge port 12h is narrower than the right side portion and the rear side portion of the discharge port 12h. The guide receiving member 90D is located in front of the second guide portion 90f.

[0157] The rotating blade 90B rotates clockwise when viewed from above, so most of the grains threshed by the winnowing device 90 are guided forward of the aircraft along the first guide section 90e by the rotation of the rotating blade 90B. Then, the grains guided forward of the aircraft that are located above the upper edge of the second guide section 90f are thrown forward of the aircraft as is. The grains guided forward of the aircraft that are located below the upper edge of the second guide section 90f are redirected to the right by the second guide section 90f and thrown to the right. If the second guide section 90f were not present, most of the grains thrown from the discharge outlet 12h would tend to fly forward of the aircraft, but the second guide section 90f suppresses the amount of grains thrown forward of the aircraft.

[0158] The first guide portion 90e and the second guide portion 90f are bent together. Therefore, the risk of grain getting stuck or trapped between the first guide portion 90e and the second guide portion 90f is reduced. On the other hand, if the grain is guided to the right along the second guide portion 90f by the rotation of the rotating blade 90B, the second guide portion 90f is prone to elastic deformation relative to the first guide portion 90e. In the event of elastic deformation of the second guide portion 90f, the second guide portion 90f is caught and supported by the guide bearing member 90D, thus preventing plastic deformation of the second guide portion 90f.

[0159] like Figure 23 As shown, the arm 92 is located on the left side of the machine body relative to the rotating shaft P1, and is positioned above the upper ends of both the second guide portion 90f and the guide bearing member 90D. Figure 21 to Figure 24 In the illustrated embodiment, the arm 92 is located at a corner inside the grain bin 12. If a grain comes into contact with the arm 92, it bounces back through the arm 92, thus posing a risk that the grain may deviate from the throwing path area S1 and flow in an unwanted direction. According to this configuration, compared to a configuration where the arm 92 is located on the right side of the machine body relative to the rotating shaft P1, and where the arm 92 is located below the upper ends of both the second guide portion 90f and the guide bearing member 90D, the flow of grain is less likely to be obstructed.

[0160] (4) In Figure 21 to Figure 24 In the illustrated embodiment, an opening 12i is formed in the top plate 12t of the grain bin 12, and the opening 12i is covered by a cover 12A. The cover 12A swings up and down around a pivot P2 with a front-to-back orientation via hinges 12j. Thus, the cover 12A is configured to change its state to a blocked state that seals the opening 12i, and an open state that swings to a position higher than the blocked state and opens the opening 12i.

[0161] like Figure 21As shown, the primary processing sensor 91 is adjacent to the opening 12i and the cover 12A on the left side of the machine body. Furthermore, hinges 12j and 12j are provided on the edge portion of the opening 12i on the side opposite to the side where the primary processing sensor 91 is located. If hinges 12j and 12j are provided on this edge portion on the side where the primary processing sensor 91 is located, the cover 12A covers the primary processing sensor 91, thus reducing the operator's workability with the primary processing sensor 91. According to this configuration, if the operator swings the cover 12A upwards, the primary processing sensor 91 is located to the left of the opening 12i, thus allowing the operator to easily operate on the primary processing sensor 91 through the opening 12i. Alternatively, the primary processing sensor 91 can also be configured to be located on the cover 12A.

[0162] In addition, such as Figure 25 As shown, the primary processing sensor 91 can also be configured to be adjacent to the opening 12i and the cover 12A on the rear side of the body. Figure 25 In the example shown, the primary processing sensor 91 is located on the right side of the winnowing device 90 relative to the machine body, and the arm 92 swings around the axis Y3 facing back and forth of the machine body. That is, in Figure 25 In the example shown, the boom 92 swings back and forth toward the axis Y3 of the machine body in a direction intersecting the left and right directions of the machine body when viewed from above. Due to the acceleration and deceleration of the combine harvester, a back-and-forth force is easily applied to the boom 92. According to... Figure 25 As shown in the configuration, the arm 92 swings in the left-right direction. Therefore, in the calculation of flow rate Fv1, compared with the configuration where the arm 92 swings in the front-back direction, the interference caused by the acceleration and deceleration of the combine harvester can be suppressed.

[0163] (5) When discharging the grains stored in the grain bin 12, the grains inside the grain bin 12 are generally discharged by the grain discharge device 14 (see reference). Figure 1 The grains are guided backward. Therefore, in typical combine harvesters, grains are often stored towards the rear of the grain bin 12. Thus, even with a configuration where the arm 92 is positioned forward of the rotating shaft P1 of the screw conveyor 90A in the direction of travel, the arm 92 is less likely to be buried by grains when the grain bin 12 is full, compared to a configuration where the arm 92 is positioned further backward of the rotating shaft P1 in the direction of travel. Therefore, the arm 92 can reliably swing until the grain bin 12 is almost full, allowing for reliable measurement of the grain flow rate.

[0164] (6) In the above-described embodiment, the parameter determining portion 80 and the control unit 82 set the opening degree of the chaffer screen to be larger when the ratio of the amount of the secondary treatment material returned to the amount of the primary treatment material recovered is larger, but the embodiment is not limited thereto. If the opening degree of the first chaffer screen 38 is set to be smaller, the flow rate Fvl of the grains decreases, and the amount of the decrease in the flow rate Fvl of the grains is recovered to the secondary treatment material recovery portion 27 as the secondary treatment material, thereby further improving the sorting accuracy. On the other hand, if the amount recovered to the secondary treatment material recovery portion 27 excessively increases, the secondary treatment material overflows from the secondary treatment material recovery portion 27, and is discharged as it is together with the waste straw and the like to become the third loss. In order to avoid such an undesirable situation, for example, as shown in FIG. 8, the opening degree of the first chaffer screen 38 can be increased by the parameter determining portion 80 and the control unit 82 when the flow rate Fv2 of the secondary treatment material is larger than a third threshold value set in advance. Thereby, the sorting treatment material is promoted to fall through the first chaffer screen 38, the flow rate Fvl of the grains increases, and the amount recovered to the secondary treatment material recovery portion 27 decreases, and thus the risk of the secondary treatment material overflowing from the secondary treatment material recovery portion 27 can be reduced. Figure 26

[0165] (7) In the above-described embodiment, the first sensor portion 64 is provided in a state of being divided from the throwing path region Sl at a position deviated from the grains thrown from the scoop 31, but the embodiment is not limited thereto. For example, the first sensor portion 64 can be provided in a state of not being divided from the throwing path region Sl inside the grain elevator 29.

[0166] (8) In the above-described embodiment, the arm portion 63 swings by contacting the grains thrown by the scoop 31, but the embodiment is not limited thereto. For example, in the case where the grain elevator 29 is configured in a screw conveyor type, the arm portion 63 can be configured to swing by contacting the grains naturally falling from the upper end portion of the grain elevator 29.

[0167] (9) In the above-described embodiment, the arm portion 63 swings around the swing shaft core Y2 provided at a position deviated from the throwing path region Sl, but the embodiment is not limited thereto. For example, the swing shaft core Y2 of the arm portion 63 can be located within the range of the throwing path region Sl.

[0168] (10) In the above-described embodiment, the arm portion 63 is configured such that the larger the swing angle θl is, the larger the proportion of the arm portion 63 extending outside the throwing path region Sl is, but the embodiment is not limited thereto. For example, the arm portion 63 can be configured such that the larger the swing angle θl is, the larger the proportion of the arm portion 63 entering within the range of the throwing path region Sl is.

[0169] ​(11) In the above embodiment, the arm portion 63 is configured to be in a downward posture in a state not contacted by the grain, but is not limited to this embodiment. For example, as long as the arm portion 63 abuts against the locking portion 69 and the arm portion 63 is configured to be subjected to the force of the coil spring 68, the arm portion 63 can be configured to be in an inclined posture in a state not contacted by the grain.

[0170] (12) In the above embodiment, the arm portion 63 is configured to be shorter than the up-and-down length of the discharge port 29h, but is not limited to this embodiment. The arm portion 63 can be configured to be the same or substantially the same as the up-and-down length of the discharge port 29h. Alternatively, the arm portion 63 can be configured to be longer than the up-and-down length of the discharge port 29h.

[0171] (13) In the above embodiment, the arm portion 63 is configured to be narrower than the lateral width of the opening of the scoop 31, but is not limited to this embodiment. For example, the arm portion 63 can be configured to be the same or substantially the same as the lateral width of the opening of the scoop 31. Alternatively, the arm portion 63 can be configured to be wider than the lateral width of the opening of the scoop 31.

[0172] In addition, the configurations disclosed in the above embodiments (including other embodiments, the same hereinafter) can be applied in combination with the configurations disclosed in other embodiments as long as there is no contradiction. In addition, the embodiments disclosed in the present specification are illustrative, and the embodiments of the present application are not limited thereto, and can be appropriately changed within the scope of the object of the present application.

[0173] Industrial applicability

[0174] The present application can be used for a combine harvester that cuts planted grain stalks of a field and performs a threshing and separating process of the cut grain stalks by a threshing device.

[0175] Explanation of reference numerals

[0176] 1: Threshing device

[0177] 12: Grain tank

[0178] 29: Grain elevator (conveying device, longitudinal conveying portion)

[0179] 29D: Conveying path (conveying path)

[0180] 29E: Return path

[0181] 29h: Discharge port

[0182] 30: Lateral feed conveying device (conveying device, lateral conveying portion)

[0183] 30S: Spiral portion (screw)

[0184] 31: bucket (throwing section)

[0185] 60: one-time treatment object sensor (flow measuring device)

[0186] 63: arm section

[0187] 64: first sensor section (sensor section)

[0188] 81A: first flow amount calculating section (calculating section)

[0189] S1: throwing path region (throwing path)

[0190] Y1: machine body transverse axis core

[0191] Y2: oscillation axis core

[0192] θ1: oscillation angle of arm section

Claims

1. A combine harvester, characterized in that, have: A threshing device that threshes crops; A grain bin for storing grains obtained by the threshing device; A conveying device that conveys grains obtained through the threshing device from the threshing device to the grain bin; as well as A flow measurement device that measures the flow rate of grains conveyed by the conveying device. The flow measurement device is equipped with: an arm that swings in contact with the conveyed grains; a sensor unit that detects the swing angle of the arm; and a calculation unit that calculates the flow rate based on the swing angle detected by the sensor unit. have: A locking part that abuts against the arm when the arm is not in contact with the grain; A spring that applies force to the arm while the arm is in contact with the locking part.

2. The combine harvester according to claim 1, characterized in that, The conveying device is equipped with a grain-throwing section. The arm swings by contact with grains thrown by the throwing part.

3. The combine harvester according to claim 2, characterized in that, The sensor unit is positioned at a location offset from the throwing path of the grains thrown by the throwing unit, thus separating it from the throwing path.

4. The combine harvester according to claim 2 or 3, characterized in that, The arm is configured to swing about a swing axis located off the throwing path of the grains thrown by the throwing part.

5. The combine harvester according to claim 4, characterized in that, The arm is configured such that the larger the swing angle, the greater the proportion extending beyond the throwing path.

6. The combine harvester according to claim 2 or 3, characterized in that, The conveying device is equipped with: a longitudinal conveying section of the type of bucket conveyor, which has multiple buckets for conveying the grains obtained by the threshing device; and a transverse conveying section of the type of screw conveyor, which has a screw that rotates about a transverse axis of the machine body and is connected to the longitudinal conveying section in an adjacent manner, receives the grains conveyed by the longitudinal conveying section, conveys them transversely, and puts them into the grain bin. A discharge port is provided on the side opposite to the conveying path in the return path section at the upper end of the longitudinal conveying section. This discharge port is for discharging grains thrown by the bucket at the upper end as it reverses its posture from an ascending to a descending position. The transverse conveying section is connected to the discharge port. An interface space between the longitudinal conveying section and the transverse conveying section is formed outside the outlet and above the transverse conveying section. The arm is configured to oscillate around a pivot located between the outlet and the transverse axis of the machine body in the junction space, at a position higher than the screw and adjacent to the longitudinal conveying section and the transverse conveying section.

7. The combine harvester according to claim 6, characterized in that, The arm is positioned in a downward-facing posture opposite the outlet without contacting the grains, and is configured to be shorter than the vertical length of the outlet.

8. The combine harvester according to claim 6, characterized in that, The lateral width of the arm is set to be narrower than the lateral width of the bucket opening.

9. The combine harvester according to any one of claims 1 to 3, characterized in that, The arm is located inside the grain bin.

10. The combine harvester according to claim 9, characterized in that, The arm is suspended and supported by the roof of the grain bin.

11. The combine harvester according to claim 9, characterized in that, The conveying device is equipped with a longitudinal conveying section, which has a longitudinal screw that, while rotating about an up-down oriented shaft, conveys the grains obtained by the threshing device and feeds them into the grain bin. The arm is located in a position further forward in the direction of travel than the spindle of the longitudinal screw.

12. The combine harvester according to any one of claims 1 to 3, characterized in that, The arm swings around an axis that, when viewed from above, intersects with the left-right direction of the aircraft.

Images