combine

Abstract

To provide a combine capable of creating a yield map by executing simple control while suppressing a time lag from reaping to the detection of yield, solving a problem with a conventional combine in which positional coordinates are measured by GNSS, a weight measuring device is provided in a grain tank, a yield of grains is measured from the weight, and recorded for each position that since there is a time lag from the time grains are reaped by a reaping machine to the time the grains are accumulated in the grain tank, it is necessary to correct the positional information and record the yield, which requires complicated control.SOLUTION: In a combine equipped with a travelling device, a reaping device, a thresher 6, and a GNSS antenna, a first grain amount sensor 55 for detecting an amount of grains is provided on a conveyance start end side of a first conveyance screw 47 for conveying grains provided below an oscillation separation shelf 45 of the thresher 6. The amount of grains detected by the first grain amount sensor 55 and a machine body position calculated by the input from the GNSS antenna are associated with each other and recorded.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a combine equipped with a threshing device for threshing cereal straw cut by a cutting device.

Background Art

[0002] There is a combine that measures position coordinates with GNSS, provides a weighing device in a grain tank for storing grains, measures the harvest amount of grains from the weight, and records it for each position (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Since there is a time lag from when the cereal straw is cut by the cutting device until the grains are stored in the grain tank, a process of correcting the position information and recording the harvest amount is required, which is a complicated control.

[0005] Therefore, the present invention provides a combine that can suppress the time lag from cutting to detecting the harvest amount and can create a yield map with simple control.

Means for Solving the Problems

[0006] The invention according to claim 1 is a combine equipped with a traveling device 4, a cutting device 15, a threshing device 6, and a GNSS antenna 27. A first grain amount sensor 55 for detecting the amount of grains is provided on the conveying start end side of the first conveying auger 47 for conveying grains provided below the oscillating sorting shelf 45 of the threshing device 6. The combine records by associating the amount of grains detected by the first grain amount sensor 55 with the position of the machine body calculated from the input from the GNSS antenna 27.

[0007] According to the invention described in claim 1, by detecting the amount of grain below the oscillating sorting shelf 45, it becomes difficult for foreign matter to be misdetected as the amount of grain, and the amount of grain can be accurately measured.

[0008] In addition, since the amount of grain is detected at a position where the moving distance of the grain from the harvesting device 15 is short, the deviation between the harvesting point and the grain amount detection point when creating the yield map is reduced, and a more appropriate yield map can be created with simple control.

[0009] The invention described in claim 2 is a combine as described in claim 1, wherein the first grain amount sensor 55 is arranged in a posture that includes the vicinity of the lower part of the first conveying auger 47 within the guide 47a of the first conveying auger 47 in the detection range, and when the amount of grain per detection unit time is less than a certain value, correction is performed to reduce the amount of grain by the number of rotations of the first conveying auger 47 per detection unit time.

[0010] According to the invention described in claim 2, by including the lower part of the first conveying auger 47 in the detection range, detection can be performed even when the amount of incoming grain is small.

[0011] In addition, when the amount of grain per detection unit time is less than a certain value, the exposed first conveying auger 47 is misdetected as grain, so by performing correction to reduce the amount of grain, accuracy can be ensured.

[0012] The invention described in claim 3 is a combine equipped with a traveling device 4, a harvesting device 15, a threshing device 6, and a GNSS antenna 27. In the combine, a first grain amount sensor 57 composed of a pressure sensor for detecting the amount of grain in an inclined posture toward the first conveying auger 47 is provided across the entire left - right width of the oscillating sorting shelf 45 or a plurality of them are provided in the left - right width direction. The combine records by associating the amount of grain detected by the first grain amount sensor 57 with the position of the machine body calculated from the input from the GNSS antenna 27.

[0013] According to the invention described in claim 3, by detecting the amount of grain below the oscillating sorting shelf 45, it becomes difficult for foreign matter to be misdetected as the amount of grain, and the amount of grain can be accurately measured.

[0014] In addition, since the grain amount is detected at a position where the moving distance of the grains from the cutting device 15 is short, the deviation between the cutting point and the grain amount detection point when creating the yield map is reduced, and a more appropriate yield map can be created with simple control.

[0015] In addition, by detecting the grains falling from the swing sorting shelf 45 by bringing them into contact with the first grain amount sensor 57, detection omission is less likely to occur and the accuracy is improved.

[0016] The invention according to claim 4 is the combine according to claim 1, wherein the bottom of the guide 47a of the first conveying screw 47 on the conveying start end side is configured to be vertically movable, a first grain amount sensor 60 constituted by a weight sensor is provided below the vertically movable portion of the guide 47a, and a covering member 63 constituted by an elastic body is provided across the vertically movable portion and the fixed portion of the guide 47a.

[0017] According to the invention described in claim 4, by detecting the grain amount based on the load applied near the conveying start end of the first guide 47a, detection omission is less likely to occur and the accuracy is improved.

[0018] The invention according to claim 5 is the combine according to claim 1, wherein a second grain amount sensor 56 for detecting the grain amount of the second conveying screw 48 that recovers the grains that have fallen from the rear part of the swing sorting shelf 45 is arranged on the conveying start end side of the second conveying screw 48, and the grain amount of the first conveying screw 47 is corrected by the grain amount of the second conveying screw 48.

[0019] According to the invention described in claim 5, since the grain amount that has been returned to the swing sorting shelf 45 by the second conveying screw 48 and merged can be roughly excluded, the accuracy of the grain amount for each location is improved.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Mode for Carrying Out the Invention

[0021] Hereinafter, the combine harvester 1 which is an embodiment of the present invention will be described with reference to the accompanying drawings. For ease of understanding, for the sake of convenience, the front side is referred to as the front side, the rear side as the rear side, the right hand side as the right side, and the left hand side as the left side when viewed from the operator, but the configuration is not limited by these.

[0022] <Overall Configuration of Combine Harvester> As shown in FIGS. 1 and 2, the combine 1 is provided with a traveling device 4 having a pair of left and right traveling crawlers 3 that travel on the soil surface on the lower side of the vehicle body 2. On the left and right of the vehicle body 2, there are a threshing device 6 that threshes and separates the cereal straws that are clamped and conveyed by the feed chain 5, a grain tank 7 as a storage device for temporarily storing the grains, and a discharge auger 8 that discharges the grains stored in the grain tank 7 to the outside of the machine. A straw discharge processing device 9 is mounted on the rear end of the threshing device 6. The discharge auger 8 rises and falls by operating the auger lifting cylinder when discharging the grains.

[0023] In front of the threshing device 6, there are a weeding body 11 that weeds the uncut cereal straws from the front end side, a raising part 12 that raises the weeded cereal straws, a cutting blade part 13 that cuts the raised cereal straws, and a supply adjustment conveyance part that rakes in the cut cereal straws and adjusts the handling depth during conveyance and transfers them to the feed chain 5. The harvesting device 15 having the like is suspended and disposed at the front end of the vehicle body 2 so as to be movable up and down with respect to the soil surface by a harvesting lifting cylinder.

[0024] An operation device for operating and controlling the combine 1 and an operation seat 21 on which the operator sits are provided at the upper rear side of the harvesting device 15. An engine is mounted below the operation seat 21, and the grain tank 7 is arranged at the rear side. A cabin 23 that covers the operation device and the operation seat 21 is provided, and these traveling device 4, threshing device 6, harvesting device 15, operation device, engine, cabin 23, etc. are mounted on the vehicle body 2 of the combine.

[0025] On the monitor provided in the cabin 23, when the full cup sensor detects that the grains in the grain tank 7 are full, an alarm for the full grain tank is displayed, and when the fuel cut sensor detects that the fuel in the fuel tank is running low, an alarm for fuel cut and various support items from the control device are displayed.

[0026] The operating device includes a main shift lever that actuates a shift actuator for switching between forward and reverse and stopping, and for main shift switching, by the forward and backward operations of the operator seated on the operator's seat 21; a steering lever that actuates a left and right traveling actuator for operating the left and right side clutches and the left and right side brakes of the left and right traveling crawlers 3, 3 by tilting operations to the left and right sides, causing straight-ahead left and right steering and turning in various turning modes, and actuates a mowing lift cylinder by an operation in the front-rear direction to raise and lower the mowing device 15; a threshing lever that actuates a threshing clutch actuator to turn on and off the drive of the mowing device 15 and the threshing device 6; an auger operation lever that moves the discharge auger 8 vertically by the operation of an auger lift cylinder and moves it horizontally by the operation of a left and right turning actuator; and various operating tools such as an auger drive switching lever that actuates an auger drive electromagnetic clutch for turning on and off the drive of the discharge auger 8 to discharge the grain in the grain tank 7 outside the machine body.

[0027] A seating sensor is provided to detect whether the operator is seated or has left the operator's seat 21. When the seating sensor detects that the operator has left the seat and the parking brake is operated and the parking brake is actuated, if the manual operation switch is pressed, only the threshing device 6 is driven.

[0028] Then, when the manual operation switch is pressed again, the drive of the threshing device 6 stops.

[0029] Also, when the seating sensor detects that the operator has seated on the operator's seat 21 while the manual operation switch is pressed and the threshing device 6 is being driven (during manual operation), the manual operation switch turns OFF, the drive of the threshing device 6 stops, and the machine body becomes drivable, so a notification device such as a buzzer sounds.

[0030] Also, when it is detected that the parking brake actuation is released, the manual operation switch turns OFF, the drive of the threshing device 6 stops, and the machine body becomes drivable, so a notification device such as a buzzer sounds.

[0031] Also, when the emergency stop switch is pressed, the pinch lever cover opens and the engine stops.

[0032] In addition, a momentary switch is provided as an intention device on the main transmission lever, and the driving of the mowing device 15, the threshing device 6, and the traveling device 4, which are stopped when the seating sensor detects that the operator has left the seat, is made movable only while the operator is pressing the momentary switch.

[0033] When the seating sensor detects that the operator who was working while pressing the momentary switch is seated, the condition of working while pressing the momentary switch is continued.

[0034] When the seating sensor detects that the operator is seated, the rotation of the drive unit is attenuated, and when the momentary switch is released, it is restored.

[0035] In addition, when the seating sensor detects that the operator has left the seat, the PTO interlock operation is delayed by a timer relay (3 seconds until operation after leaving the seat).

[0036] If the momentary switch is pressed within the delay time, the work can be continued continuously.

[0037] <Cab 23> As shown in FIG. 3, the cab 23 is configured in a box shape by providing a cab roof 25 on the upper part of a cab frame 24 whose base is fixed to the vehicle body 2, equipped with a door 26 whose front side opens and closes on the right side, a left glass window on the left side, a front glass window on the front side, and a rear glass window on the rear side, and a GNSS antenna 27 is provided on the upper surface of the cab roof 25.

[0038] The control device 31 records map data, calculates the current aircraft position based on the input from the GNSS antenna 27, and stores it in the map data in time series.

[0039] An air conditioner unit 30 is provided at the center position in the front-rear direction on the upper left side inside the cab 23, a control device 31 equipped with a GNSS unit as a position information acquisition device is provided behind the air conditioner unit 30, and an inside / outside air switching unit 32 and a switching electric motor 33 are provided behind the operator's seat 21.

[0040] During the harvesting operation with the combine 1, a large amount of dust is generated, so the airtightness of the cabin 23 is enhanced. However, when the degree of airtightness increases, there is a problem that the door 26 becomes difficult to close and turns into a half-door.

[0041] Therefore, taking advantage of the fact that a dust intrusion prevention filter is installed at the outside air inlet of the inside-outside air switching part 32, when closing the door 26, the inside-outside air switching part 32 is switched to outside air introduction to reduce the airtightness while preventing dust intrusion, making it easier to close the door 26 and preventing it from becoming a half-door.

[0042] That is, an opening / closing detection sensor for detecting the opening and closing of the door 26 is provided. When the opening / closing detection sensor detects that the door 26 is open, the control device 31 operates the switching electric motor 33 to switch the inside-outside air switching part 32 to outside air introduction.

[0043] Therefore, when closing the door 26 from the open state, since the inside-outside air switching part 32 is in the outside air introduction state, it is possible to reduce the airtightness while preventing dust intrusion, making it easier to close the door 26 and preventing it from becoming a half-door.

[0044] And when the controller of the air conditioner unit 30 is in the inside air introduction state, after the opening / closing detection sensor detects that the door 26 is closed, the switching electric motor 33 is operated to switch the inside-outside air switching part 32 to inside air introduction.

[0045] When the key switch is OFF, since the harvesting operation is not being performed, the control device 31 operates the switching electric motor 33 regardless of the opening and closing of the door 26 to switch the inside-outside air switching part 32 to outside air introduction.

[0046] Overall, the switching between the outside air and the inside air of the above inside-outside air switching part 32 is as shown in the flowchart of FIG. 4.

[0047] <Threshing device 6> As shown in Fig. 5, an operation chamber 40 for threshing the cereal straw cut by the cutting device 15 and conveyed by the feed chain 5 is provided above the threshing device 6, and an operation cylinder 41 is mounted on an operation cylinder shaft 42 in the operation chamber 40.

[0048] The driving force to the threshing device 6 is input to the operation cylinder shaft 42 and transmitted to each part of the threshing device 6.

[0049] A threshing rotation sensor 43 is provided on the operation cylinder shaft 42, and the driving rotation speed is detected and input to the control device 31.

[0050] The mainly lower side of the operation cylinder 41 is surrounded by an operation net 44.

[0051] Below the operation net 44, the transfer shelf 45a at the starting end of the swing sorting shelf 45 as a sorting device is faced. A sieve 45b for sorting grains and foreign matters is provided on the lower side of the transfer shelf 45a, and a straw rack 45c capable of transferring straw scraps is provided on the lower side of the sieve 45b.

[0052] A winnowing basket 46 is provided below the transfer shelf 45a of the swing sorting shelf 45, and the winnowing basket 46 blows air toward the swing sorting shelf 45.

[0053] A first conveying auger 47 for conveying the sorted grains to the grain tank 7 is provided below the sieve 45b of the swing sorting shelf 45.

[0054] A second conveying auger 48 for conveying the mixture of straw scraps and grains to the operation chamber 40 is provided below the straw rack 45c at the rear of the swing sorting shelf 45.

[0055] At a predetermined position above the swing sorting shelf 45, a layer thickness sensor 50 as a grain amount sensor for detecting the layer thickness of the grains (objects to be processed) on the swing sorting shelf 45 is provided at the left - right center position.

[0056] The layer thickness sensor 50 rotates upward from the initial angle according to the layer thickness of the grains on the swing sorting shelf 45, and sends a detection voltage to the control device 31 according to the rotation angle.

[0057] That is, when the layer thickness of the grains on the oscillating sorting shelf 45 is thin (the amount of grains is small), a detection low voltage is sent to the control device 31, and as the layer thickness increases (as the amount of grains increases), a detection high voltage is sent. Thus, the control device 31 calculates the layer thickness of the grains on the oscillating sorting shelf 45 based on the detection voltage from the layer thickness sensor 50.

[0058] Then, the control device 31 controls the wind force of the winnowing basket 46 and the opening degree of the sieve 45b according to the calculated layer thickness of the grains on the oscillating sorting shelf 45 (as the detection value of the layer thickness sensor 50 increases (as the layer thickness becomes thicker), the wind force of the winnowing basket 46 is strengthened and the opening degree of the sieve 45b is increased).

[0059] As shown in FIGS. 5 and 6, at the starting end side of the first guide 47a of the first conveying screw 47 (near the left outer side of the body of the threshing device 6), a first distance sensor 55 for detecting the distance toward the bottom of the first guide 47a is provided as the first grain amount sensor, and it detects the height L1 (grain amount) of the grains in the first guide 47a conveyed by the first conveying screw 47 and sends the detection value to the control device 31.

[0060] By providing the first distance sensor 55 at the starting end side of the first guide 47a of the first conveying screw 47, an accurate grain amount can be detected without being affected by the change in layer thickness when the grains are discharged from the first conveying screw 47.

[0061] By including the lower part of the first conveying screw 47 in the detection range, detection can be performed even when the amount of incoming grains is small.

[0062] And when the grain amount per detection unit time is less than a certain value, when the first distance sensor 55 detects a height L2 or less of the grains, the first conveying screw 47 will be detected and it will be a false detection. Therefore, a correction is made to reduce the grain amount corresponding to the number of rotations of the first conveying screw 47 calculated from the number of driving rotations detected by the threshing rotation sensor 43 in the detection unit time.

[0063] That is, as shown in FIG. 7, a correction is made.

[0064] Therefore, when the amount of grains per detection unit time is less than a certain value, the first distance sensor 55 can correct the amount of grains misdetected due to detecting the first conveying screw 47, ensuring accuracy.

[0065] Then, the control device 31 associates and records the amount of grains with the aircraft position calculated from the input from the GNSS antenna 27.

[0066] Also, at the starting end side of the second guide 48a of the second conveying screw 48 (near the left outer side of the aircraft of the threshing device 6), a second distance sensor 56 for detecting the distance toward the bottom of the second guide 48a is provided as the second grain amount sensor, and it detects the height L1 (amount of grains) of the grains in the second guide 48a conveyed by the second conveying screw 48 and sends the detection value to the control device 31.

[0067] When the amount of grains per detection unit time is less than a certain value, when the second distance sensor 56 detects a height less than or equal to the height L2 of the grains, it will detect the second conveying screw 48 and result in a false detection. Therefore, a correction is made to reduce the amount of grains corresponding to the number of rotations of the second conveying screw 48 calculated from the number of driving rotations detected by the threshing rotation sensor 43 per detection unit time.

[0068] That is, the correction is made as shown in FIG. 7.

[0069] The control device 31 associates and records the amount of grains conveyed by the second conveying screw 48 with the aircraft position calculated from the input from the GNSS antenna 27.

[0070] When the control device 31 stores the amount of grains in the map data to create a yield map, it corrects the amount of grains of the first conveying screw 47 with the amount of grains conveyed by the second conveying screw 48 to complete and store the yield map.

[0071] The means for correcting the amount of grains of the first conveying screw 47 with the amount of grains conveyed by the second conveying screw 48 is performed as shown in FIG. 8.

[0072] Therefore, the amount of grain returned to the swing sorting shelf 45 by the second conveying screw 48 and merged can be approximately excluded, so the accuracy of the grain amount for each location is improved and an accurate yield map can be created.

[0073] And, since the grain amount is detected at a position where the moving distance of the grain from the harvesting device 15 is short, the deviation between the harvesting point and the grain amount detection point when creating the yield map becomes small, and a more appropriate yield map can be created with simple control.

[0074] Also, when the grain straw sensor provided on the harvesting device 15 stops detecting the grain straw and the first distance sensor 55 or the second distance sensor 56 detects the grain amount after a predetermined time, the monitor or notification device in the cabin 23 notifies that the first distance sensor 55 or the second distance sensor 56 is dirty and misdetecting, prompting cleaning.

[0075] FIG. 9 shows a second embodiment of the threshing device 6 using a first pressure-sensitive sensor 57 and a second pressure-sensitive sensor 58 as the first grain amount sensors instead of the first distance sensor 55 and the second distance sensor 56 for detecting the grain amount in the first embodiment.

[0076] That is, a first pressure-sensitive sensor 57 spanning the entire left and right width of the swing sorting shelf 45 (the entire left and right width of the threshing device 6) is provided near the upper part of the first conveying screw 47 below the swing sorting shelf 45 to detect the grain amount and send the detection value to the control device 31.

[0077] And the control device 31 associates and records the above grain amount with the aircraft position calculated from the input from the GNSS antenna 27.

[0078] Also, a second pressure-sensitive sensor 58 spanning the entire left and right width of the swing sorting shelf 45 (the entire left and right width of the threshing device 6) is provided near the upper part of the second conveying screw 48 below the swing sorting shelf 45 to detect the grain amount and send the detection value to the control device 31.

[0079] The control device 31 associates and records the above grain amount with the aircraft position calculated from the input from the GNSS antenna 27.

[0080] Then, similar to the first embodiment, when creating a yield map by storing the amount of grain in the map data, the control device 31 corrects the amount of grain detected by the first pressure sensor 57 with the amount of grain detected by the second pressure sensor 58 and completes and stores the yield map.

[0081] The first pressure sensor 57 and the second pressure sensor 58 are each provided obliquely inclined toward the first conveying auger 47 and the second conveying auger 48, respectively, preventing the accumulation of grain on the upper surface.

[0082] Note that a plurality of small first pressure sensors 57 and second pressure sensors 58 may be arranged side by side at equal intervals across the entire left - right width of the swing sorting shelf 45.

[0083] By bringing the grains falling from the swing sorting shelf 45 into contact with the first pressure sensor 57 and the second pressure sensor 58 for detection, detection omission is less likely to occur and accuracy is improved.

[0084] Figs. 10 and 11 show a third embodiment of the threshing device 6 using a first weight sensor 60 and a second weight sensor 61 as the first grain amount sensors instead of the first distance sensor 55 and the second distance sensor 56 for detecting the amount of grain in the first embodiment.

[0085] That is, the first guide 47a of the first conveying auger 47 is composed of a fixed guide 47b fixed to the threshing frame 6a and a rotating guide 47c whose starting end side (the left outer side of the threshing device 6 body) is connected to the threshing frame 6a by a hinge 62 and whose inner end side is freely movable up and down. A first weight sensor 60 is provided below the rotating guide 47c.

[0086] Then, a rubber plate 63 as a covering member with its base (left outer part) fixed to the threshing frame 6a is provided so as to extend from the inner surface of the rotating guide 47c to the inner surface of the fixed guide 47b toward the inside of the machine body, provided so as to block the gap between the fixed guide 47b and the rotating guide 47c, and prevent the grain from leaking from the first guide 47a even when the rotating guide 47c moves up and down.

[0087] Therefore, by weighing the rotating guide 47c with the first weight sensor 60, the amount of grains in the rotating guide 47c can be detected, and the detected value is sent to the control device 31.

[0088] By detecting at one location on the starting end side of the first guide 47a of the first conveying screw 47, it can be made inexpensively with a simpler configuration than detecting at a plurality of locations.

[0089] Then, the control device 31 associates and records the amount of grains with the aircraft position calculated from the input from the GNSS antenna 27.

[0090] Similarly, the second guide 48a of the second conveying screw 48 is configured by a fixed guide 48b fixed to the threshing frame 6a and a rotating guide 48c whose starting end side (the left outer side of the aircraft of the threshing device 6) is connected to the threshing frame 6a by a hinge 62 and whose inner end side can move up and down freely. A second weight sensor 61 is provided below the rotating guide 48c.

[0091] Then, a rubber plate 63 with its base (left outer part) fixed to the threshing frame 6a is provided so as to extend from the inner surface of the rotating guide 48c to the inner surface of the fixed guide 48b toward the inside of the aircraft, and is provided so as to block the gap between the fixed guide 48b and the rotating guide 48c, so that grains do not leak from the second guide 48a even when the rotating guide 48c moves up and down.

[0092] Therefore, by weighing the rotating guide 48c with the second weight sensor 61, the amount of grains in the rotating guide 48c can be detected, and the detected value is sent to the control device 31.

[0093] The control device 31 associates and records the amount of grains with the aircraft position calculated from the input from the GNSS antenna 27.

[0094] Then, similar to the first embodiment, when the control device 31 stores the amount of grains in the map data to create a yield map, the amount of grains detected by the first weight sensor 60 is corrected by the amount of grains detected by the second weight sensor 61 to complete and store the yield map.

[0095] By detecting the amount of grain based on the load applied near the starting end of the first guide 47a and the second guide 48a, detection leakage is less likely to occur and the accuracy is improved.

[0096] Further, when comparing the amount of grain calculated by the first weight sensor 60 and the second weight sensor 61 with the amount of grain on the oscillating sorting shelf 45 detected by the layer thickness sensor 50, the flow of grain (sorted material) in the threshing device 6 can be grasped, and control for improving the threshing performance (sorting performance) can be performed.

[0097] That is, when the amount of grain calculated by the first weight sensor 60 and the second weight sensor 61 is less than the amount of grain on the oscillating sorting shelf 45 detected by the layer thickness sensor 50, the control device 31 determines that there is a lot of straw and chaff, etc., and controls the wind force of the winnowing basket 46 to become stronger.

[0098] Also, when both the amount of grain calculated by the first weight sensor 60 and the second weight sensor 61 and the amount of grain on the oscillating sorting shelf 45 detected by the layer thickness sensor 50 are large, the control device 31 determines that there is little straw and chaff, etc., and controls the wind force of the winnowing basket 46 to become weaker.

[0099] In addition, when the amount of grain calculated by the first weight sensor 60 and the second weight sensor 61 is more than the amount of grain on the oscillating sorting shelf 45 detected by the layer thickness sensor 50, the control device 31 determines that an abnormality has occurred, issues an alarm, and limits the vehicle speed to prevent damage to the threshing device 6 and to prevent loss of grain.

Explanation of Signs

[0100] 4 Traveling device 6 Threshing device 15 Reaping device 27 GNSS antenna 45 Oscillating sorting shelf 47 First conveying auger 47a Guide (first guide) 48 Second conveying auger 55 First grain amount sensor (first distance sensor) 56 Secondary grain quantity sensor (secondary distance sensor) 57 Primary grain quantity sensor (primary pressure sensor) 60 Primary grain quantity sensor (primary weight sensor) 63 Covering member (rubber plate)

Claims

1. In a combine harvester equipped with a traveling device (4), a cutting device (15), a threshing device (6), and a GNSS antenna (27), a first grain amount sensor (55) for detecting the amount of grains is provided on the conveying start end side of a first conveying auger (47) that conveys grains provided below a swing sorting shelf (45) of the threshing device (6), and the combine harvester is characterized in that the amount of grains detected by the first grain amount sensor (55) is associated with and recorded together with the position of the machine body calculated from the input from the GNSS antenna (27).

2. The first grain amount sensor (55) is arranged in a posture that includes the vicinity of the lower part of the first conveying auger (47) within a guide (47a) of the first conveying auger (47) in the detection range, and when the amount of grains per detection unit time is less than a certain value, correction is made to reduce the amount of grains per rotation of the first conveying auger (47) in the detection unit time. The combine harvester according to Claim 1, characterized by this.

3. In a combine harvester equipped with a traveling device (4), a cutting device (15), a threshing device (6), and a GNSS antenna (27), a first grain amount sensor (57) composed of a pressure-sensitive sensor for detecting the amount of grains in an inclined posture toward the first conveying auger (47) is provided between the swing sorting shelf (45) of the threshing device (6) and the upper and lower parts of the first conveying auger (47) that conveys grains, across the entire left-right width of the swing sorting shelf (45) or a plurality are provided in the left-right width direction, and the combine harvester is characterized in that the amount of grains detected by the first grain amount sensor (57) is associated with and recorded together with the position of the machine body calculated from the input from the GNSS antenna (27).

4. The bottom of the conveying start end side of the guide (47a) of the first conveying auger (47) is configured to be vertically movable, a first grain amount sensor (60) composed of a weight sensor is provided below the vertically movable part of the guide (47a), and the combine harvester according to Claim 1, characterized by providing a covering member (63) composed of an elastic body across the vertically movable part and the fixed part of the guide (47a).

5. A second grain amount sensor (56) for detecting the amount of grains of a second conveying auger (48) that recovers grains falling from the rear part of the swing sorting shelf (45) is arranged on the conveying start end side of the second conveying auger (48), and the combine harvester according to Claim 1, characterized in that the amount of grains of the first conveying auger (47) is corrected by the amount of grains of the second conveying auger (48).

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