Combine harvester

Abstract

To provide a combine harvester capable of preventing grain from remaining in a threshing device and reducing grain recovery loss.SOLUTION: A combine harvester includes: a compressor (60) that is provided in an engine room (6); a transfer screw trough (40) that conveys grain to a discharge auger (8) at the bottom of a grain tank (7); a first grain-lifting tube (30) that lifts grain collected in a first receiving trough (27) to the grain tank (7), a second grain-lifting tube (31) that lifts grain collected in a second receiving trough (28) to a transfer shelf (25A) of a swinging selection device (25); a first nozzle (62) that jets compressed air supplied from the compressor (60) toward the transfer shelf (25A); a second nozzle (63) that jets the compressed air toward the base of the first grain-lifting tube (30); a third nozzle (64) that jets the compressed air toward the base of the second grain-lifting tube (31); a fourth nozzle (65) that jets the compressed air toward the rear of the transfer screw trough (40); and a fifth nozzle (66) that jets the compressed air toward the base of a vertical discharge tube (8A) of the discharge auger (8).SELECTED DRAWING: Figure 13

Description

[Technical field]

[0001] The present invention relates to a combine harvester that sorts and processes harvested grain stalks using a threshing device. [Background technology]

[0002] In conventional combine harvesters, a technique is known in which the stalks harvested by the harvesting device are sorted by a threshing device, the sorted grains are stored in a grain tank, and when the grain tank becomes full, the grains are discharged by a discharge auger onto the bed of a work vehicle (see Patent Documents 1 to 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-117570 A [Patent Document 2] JP 2019-195302 A [Patent Document 3] JP 2020-80748 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the techniques of Patent Documents 1 to 3, it is difficult to recover grains that remain in the threshing device or grain tank, resulting in a large loss of grain recovery, and there is also the problem that the retained grains become rotten and develop mold, etc.

[0005] Therefore, a main object of the present invention is to provide a combine harvester that can prevent grains from remaining in the threshing device and reduce grain recovery loss. [Means for solving the problem]

[0006] The present invention which has solved the above problems is as follows. That is, the invention described in claim 1 is a combine harvester including a threshing device (4) for threshing and sorting the stalks at the rear left of a reaping device (3) for harvesting the stalks, a control section (5) for an operator to ride on at the rear right of the reaping device (3), an engine room (6) for mounting an engine (E) below the control section (5), a grain tank (7) for storing sorted grains at the rear of the control section (5), and a discharge auger (8) for discharging the stored grains to the outside at the rear of the grain tank (7), A oscillating sorting device (25) for sorting grains leaking from the threshing drum (21) is provided below the oscillating sorting device (25), a first receiving tub (27) and a second receiving tub (28) for collecting sorted grains are provided below the oscillating sorting device (25), a compressor (60) is provided in the engine room (6), a conveying spiral tub (40) for conveying grains to the discharge auger (8) is provided at the bottom of the grain tank (7), a first grain lifting tube (30) for lifting the grains collected in the first receiving tub (27) to the grain tank (7), and a oscillating sorting device (25) for lifting the grains collected in the second receiving tub (28) to the grain tank (7). The combine harvester is characterized in that it is provided with a second grain lifting bin (31) for lifting grain onto a transfer shelf (25A) of a feeder (25), and is provided with a first nozzle (62) for spraying compressed air supplied from the compressor (60) toward the transfer shelf (25A), a second nozzle (63) for spraying compressed air toward the base of the first grain lifting bin (30), a third nozzle (64) for spraying air toward the base of the second grain lifting bin (31), a fourth nozzle (65) for spraying air toward the rear of the conveying spiral tub (40), and a fifth nozzle (66) for spraying air toward the base of the vertical discharge tub (8A) of the discharge auger (8).

[0007] The invention described in claim 2 is the combine harvester described in claim 1, wherein the steering section (5) is provided with a mode changeover switch (13) for operating solenoid valves (61A-61F) provided in a piping path between the compressor (60) and the first to fifth nozzles (62-66), and when the mode changeover switch (13) is set to a cleaning mode, compressed air is sprayed from the first to fifth nozzles (62-66), when the mode changeover switch (13) is set to a grain recovery mode, compressed air is sprayed alternately from the first to third nozzles (62-64) and the fourth and fifth nozzles (65, 66), and when the mode changeover switch (13) is set to a work mode, compressed air is sprayed alternately from the first to third nozzles (62-64) and compressed air is sprayed alternately from the fourth and fifth nozzles (65, 66).

[0008] The invention described in claim 3 is the combine described in claim 2, wherein, in the grain recovery mode and the working mode, compressed air is sprayed from the first to third nozzles (62-64) when the harvesting device (3) and the threshing device (4) are operating, and compressed air is sprayed from the fourth and fifth nozzles (65, 66) when the discharge auger (8) is operating.

[0009] The invention described in claim 4 is a combine harvester according to claim 1 or 2, in which a layer thickness sensor (22S) for measuring a layer thickness of grains being transported on the transport shelf (25A) is provided on the underside of the handling drum (21), and when the layer thickness sensor (22S) measures a predetermined layer thickness, compressed air is not sprayed from the first to fifth nozzles (62-66).

[0010] The invention described in claim 5 is a combine harvester described in claim 1 or 2, in which a stump sensor (3S) is provided at the rear of the harvesting device (3) to measure the stump transported from the harvesting device (3) to the threshing device (4), and when the stump sensor (3S) measures a predetermined stump, compressed air is not sprayed from the first to fifth nozzles (62-66).

[0011] The invention recited in claim 6 is the combine harvester recited in claim 1, wherein the compressor (60) is detachably provided in the engine compartment (6). Effect of the Invention

[0012] According to the invention described in claim 1, a oscillating sorting device (25) for sorting grains leaking from the threshing drum (21) is provided below the threshing drum (21) of the threshing device (4), a first receiving tub (27) and a second receiving tub (28) for collecting the sorted grains are provided below the oscillating sorting device (25), a compressor (60) is provided in the engine room (6), a conveying spiral tub (40) for conveying the grains to the discharge auger (8) is provided at the bottom of the grain tank (7), a first lifting tube (30) for lifting the grains collected in the first receiving tub (27) to the grain tank (7), and a first lifting rack (30) for lifting the grains collected in the second receiving tub (28) to the transfer shelf (25A) of the oscillating sorting device (25). A second grain lifting bin (31) is provided for lifting the grain, and compressed air supplied from a compressor (60) is sprayed toward the transfer shelf (25A) through a first nozzle (62), a second nozzle (63), a third nozzle (64), a fourth nozzle (65), a fifth nozzle (66), a fourth nozzle (65), and a fifth nozzle (66) that sprays air toward the rear of the conveying spiral tub (40), and the base of the vertical discharge tub (8A) of the discharge auger (8).This prevents grains from remaining in the threshing device (4), the grain tank (7), and the discharge auger (8), and reduces grain recovery loss.

[0013] According to the invention of claim 2, in addition to the effect of the invention of claim 1, a mode changeover switch (13) is provided in the control section (5) for operating solenoid valves (61A-61F) provided in the piping paths of the compressor (60) and the first to fifth nozzles (62-66). When the mode changeover switch (13) is set to the cleaning mode, compressed air is blown out from the first to fifth nozzles (62-66), and when the mode changeover switch (13) is set to the grain recovery mode, compressed air is blown out from the first to third nozzles (62-64) and the fourth and fifth nozzles (65, 66). In the alternately ejecting operation mode, compressed air is ejected alternately from the first to third nozzles (62-64) and alternately from the fourth and fifth nozzles (65, 66), so that compressed air is ejected from the first nozzle (62) toward the transfer shelf (25A), from the second nozzle (63) toward the base of the first lifting bin (30), and from the third nozzle (64) toward the base of the second lifting bin (31), thereby efficiently recovering stalks and the like that are retained on the transfer shelf (25A) of the threshing device (4). In addition, compressed air is ejected from the fourth nozzle (65) toward the rear of the conveying spiral tub (40) and from the fifth nozzle (66) toward the base of the vertical discharge tub (8A), thereby efficiently recovering grains that are retained in the conveying spiral tub (40).

[0014] According to the invention described in claim 3, in addition to the effects of the invention described in claim 2, in the grain recovery mode and the operation mode, compressed air is sprayed from the first to third nozzles (62-64) when the harvesting device (3) and the threshing device (4) are operating, and compressed air is sprayed from the fourth and fifth nozzles (65, 66) when the discharge auger (8) is operating, so that stalk branches and the like remaining on the transfer shelf (25A) of the threshing device (4) and grains remaining in the transport spiral barrel (40) can be more efficiently recovered.

[0015] According to the invention described in claim 4, in addition to the effects of the invention described in claim 1 or 2, a layer thickness sensor (22S) for measuring the layer thickness of the grains being transported on the transport shelf (25A) is provided on the underside of the handling drum (21), and when the layer thickness sensor (22S) measures a predetermined layer thickness, compressed air is not sprayed from the first to fifth nozzles (62 to 66), so that grains that have leaked down to the transport shelf (25A) can be efficiently transported to the rear sieve.

[0016] According to the invention described in claim 5, in addition to the effects of the invention described in claim 1 or 2, a stump sensor (3S) is provided at the rear of the harvesting device (3) to measure the stumps transported from the harvesting device (3) to the threshing device (4). When the stump sensor (3S) measures a specified stump, compressed air is not sprayed from the first to fifth nozzles (62-66), so that the stumps can be efficiently threshed by the threshing drum (21).

[0017] According to the invention recited in claim 6, in addition to the effects of the invention recited in claim 1 or 2, since the compressor (60) is detachably provided in the engine room (6), the compressor (60) can be easily attached and detached from the engine room (6). [Brief description of the drawings]

[0018] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. 2 is a longitudinal cross-sectional view of the threshing device in the front-to-rear direction. [Diagram 5] FIG. 2 is a cross-sectional view of the threshing device taken from the front to rear. [Figure 6] This is a front view of the handling drum and the second processing drum, etc. [Figure 7] FIG. 2 is a rear view of the handling drum and the dust treatment drum, etc. [Figure 8] This is a right side view explaining the first grain lifting bin and the second grain lifting bin. [Figure 9] FIG. 1 is a piping diagram of compressed air exhausted from a compressor. [Figure 10] FIG. 2 is a connection diagram of a controller. [Figure 11] 11A and 11B are explanatory diagrams of a method of ejecting compressed air in a cleaning mode. [Figure 12] 11 is an explanatory diagram of a method of ejecting compressed air in a grain recovery mode. FIG. [Figure 13] 10A and 10B are explanatory diagrams of a method of ejecting compressed air in a work mode. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] As shown in Figures 1 and 2, the combine harvester has a traveling device 2 having a pair of left and right crawlers that travel on the soil surface on the underside of a body frame 1, and a harvesting device 3 that harvests grain stalks in the field is provided in front of the body frame 1.

[0020] A threshing device 4 that threshes and sorts the culms harvested by the reaping device 3 is provided on the rear left side of the reaping device 3, and a control unit 5 on which an operator rides is provided on the rear right side of the reaping device 3. In addition, a culm transport device 3A that transports the harvested culms rearward is provided at the rear of the reaping device 3, and a culm sensor 3S that measures the presence or absence of culms within the culm transport device 3A is provided.

[0021] An engine room 6 in which an engine E is mounted is provided below the control unit 5, and a grain tank 7 in which grains threshed and sorted by the threshing device 4 are stored is provided behind the control unit 5. A discharge auger 8 that discharges grains stored in the grain tank 7 to the outside is connected to the rear of the grain tank 7. The discharge auger 8 is formed of a vertical discharge tube 8A connected to the rear of the grain tank 7 and extending in the vertical direction, and a horizontal discharge tube 8B extending forward from an upper portion of the vertical discharge tube 8A.

[0022] 3, a front panel 10 is provided in front of the driver's seat of the control section 5, and a touch panel monitor 11 that displays the output speed of the engine E and the like is provided in the center of the front panel 10, and an operation lever 12 for operating the rotation of the traveling device 2 and the elevation of the reaping device 3 is provided on the right side of the monitor 11, and a mode change switch 13 for changing the mode in which compressed air exhausted from the compressor 60 provided in the engine room 6 is sprayed toward the transfer shelf 25A or the conveying spiral installed inside the first grain lifting tube 25B is provided on the left side of the monitor 11. Also, a narrow guide extending to the left side of the machine frame 1 can be depicted on the monitor 11.

[0023] The operating position of the operating lever 12 is measured by an angle sensor such as a potentiometer attached to the lower part of the operating lever 12. When the operating lever 12 is tilted forward, the mowing device 3 descends to the mowing position, and when it is tilted backward, the mowing device 3 rises to the waiting position. When the operating lever 12 is tilted left, the traveling device 2 turns left, and when it is tilted right, the traveling device 2 turns right.

[0024] A side panel 14 is provided to the left of the cockpit. A main speed change lever 15 is provided in front of the side panel 14 to operate a continuously variable transmission that increases / decreases the output speed of the engine E and switches the direction of rotation, and a sub-speed change lever 16 is provided behind the main speed change lever 15 to operate a transmission that increases / decreases the output rotation of the engine E.

[0025] On the left side of the main shift lever 15 is a harvesting / disconnecting lever 17 which operates to connect and disconnect the harvesting clutch that transmits the output speed of the engine E to the harvesting device 3, and the threshing clutch that transmits the output speed of the engine E to the threshing device 4.

[0026] A discharge lever 18 is provided behind the cutting lever 17 for engaging and disengaging a discharge clutch that transmits the output speed of the engine E to the discharge auger 8. When the discharge clutch is engaged, the conveying spiral mounted in the conveying spiral tub 40 provided at the bottom of the grain tank 7 also rotates.

[0027] The operating position of the main shift lever 15 is measured by an angle sensor such as a potentiometer attached to the bottom of the main shift lever 15, the operating position of the sub-shift lever 16 is measured by an angle sensor attached to the bottom of the sub-shift lever 16, the operating position of the mowing / removal lever 17 is measured by an angle sensor 17S attached to the bottom of the mowing / removal lever 17, and the operating position of the discharge lever 18 is measured by an angle sensor 18S attached to the bottom of the discharge lever 18.

[0028] When the main speed change lever 15 is in the neutral position, the output rotation speed of the continuously variable transmission becomes zero. When the main speed change lever 15 is tilted forward from the neutral position, the output rotation direction output from the continuously variable transmission becomes forward rotation, which is the same as the output rotation direction of the engine E. When the tilt angle of the front tilt position is increased, the output rotation speed of the continuously variable transmission increases, and when the tilt angle of the front tilt position is decreased, the output rotation speed of the continuously variable transmission decreases. When the main speed change lever 15 is tilted rearward from the neutral position, the output rotation direction of the continuously variable transmission becomes reverse rotation, which is opposite to the output rotation direction of the engine E. When the tilt angle of the rear tilt position is increased, the output rotation speed of the continuously variable transmission increases, and when the tilt angle of the rear tilt position is decreased, the output rotation speed of the continuously variable transmission decreases.

[0029] When the sub-speed-change lever 16 is in the neutral position, the output speed of the transmission is not increased or decreased. When the sub-speed-change lever 16 is moved from the neutral position to a forward tilted position, the output speed of the transmission is increased, and when the sub-speed-change lever 16 is moved from the neutral position to a rearward tilted position, the output speed of the transmission is decreased.

[0030] When the cutting / threshing lever 17 is in the forward tilted position, the cutting clutch and the threshing clutch are released, and the cutting device 3 and the threshing device 4 are stopped. When the cutting / threshing lever 17 is in the rearward tilted position, the cutting clutch and the threshing clutch are connected, and the cutting device 3 and the threshing device 4 are driven. When the cutting / threshing lever 17 is in the neutral position, the cutting clutch is released and the threshing clutch is connected, the cutting device 3 is stopped, and the threshing device 4 is driven.

[0031] When the discharge lever 18 is in the forward tilted position, the discharge clutch is released and the discharge auger 8 stops. When the discharge lever 18 is in the rearward tilted position, the discharge clutch is engaged and the discharge auger 8 operates.

[0032] As shown in Figures 4 to 7, a threshing drum 21 that threshes the stalks transported from the harvesting device 3 by the feed chain 20 is provided on the upper part of the threshing device 4. A receiving net 22 is provided on the underside of the threshing drum 21, and a layer thickness sensor 22S is attached to the lower part of the receiving net 22 for measuring the layer thickness of grains transported on the upper surface of a transfer shelf 25A of a swinging sorting device 25 that sorts the grains threshed by the threshing drum 21. The feed chain 20 is provided along a threshing opening formed on the left wall of the threshing device 4 and extending in the front-rear direction.

[0033] A threshing drum cover 23 is provided on the upper side of the threshing drum 21, and a clamping stalk 24 that is urged toward the feed chain 20 is provided on the lower part of the left wall of the threshing drum cover 23.

[0034] The upper part of the oscillating sorting device 25 is provided with, from the front, a transfer shelf 25A formed from a plate-shaped body, a fixed sieve 25B formed from a plurality of plate-shaped bodies arranged at a predetermined interval in the front-to-rear direction with a rear-upward inclination, a variable sieve 25C formed from a plurality of plate-shaped bodies arranged at a predetermined interval in the front-to-rear direction so that the rear-upward inclination angle can be changed, and a straw rack 25D formed from a plurality of plate-shaped bodies arranged at a predetermined interval in the left-to-right direction, and the lower part of the oscillating sorting device 25 is provided with a sorting net 25E for sorting grains leaking down from the fixed sieve 25B and the variable sieve 25C.

[0035] Provided below the oscillating sorting device 25 are, in order from the front, a winnower 26 that blows sorting air toward the fixed sieve 25B and the variable sieve 25C, a No. 1 receiving tub 27 that collects grains (hereinafter referred to as No. 1 grains) that leak down from the fixed sieve 25B and the variable sieve 25C, and a No. 2 receiving tub 28 that collects grains (hereinafter referred to as No. 2 grains) with stalks and the like attached that leak down from the straw rack 25D. The No. 1 receiving tub 27 is also provided with a conveying spiral (not shown) that extends left and right for conveying the No. 1 grains, and the No. 2 receiving tub 28 is also provided with a conveying spiral (not shown) that extends left and right for conveying the No. 2 grains.

[0036] The first grain collected in the first receiving tub 27 is lifted into the grain tank 7 by the first lifting tube 30, and the second grain is lifted by the second lifting tube 31 into the second processing drum 32, which is arranged in parallel to the right side of the handling drum 21. The first lifting tube 30 is fitted with a conveying spiral for lifting the first grain, the second lifting tube 31 is fitted with a conveying spiral for lifting the second grain, and the second processing drum 32 is provided on its outer periphery with a conveying spiral 32A for conveying the second grain forward.

[0037] A dust discharge processing drum 33 is provided on the rear side of the second processing drum 33 to transport straw chips mixed in with the second-grade material backward, and a dust discharge transport spiral 33A is provided on the outer periphery of the dust discharge processing drum 33 to transport the straw chips backward. In addition, a dust discharge fan 34 is provided above the straw rack 25D of the oscillating separator 25 to suck in the straw chips and discharge them to the outside.

[0038] A straw discharge conveying device 36 that conveys the threshed stalks backward is provided on the rear side of the feed chain 20. In addition, a pair of front and rear cutters 37 that shred the straw discharged stalks dropping from the straw discharge conveying device 36 is provided below the straw discharge conveying device 36.

[0039] As shown in Figure 8, the lower part of the right wall of the threshing device 4 and the upper part of the left wall of the grain tank 7 are connected by a first lifting bin 30. A second lifting bin 31 that lifts the second grain to the oscillating sorting device 25 is provided at the rear of the first lifting bin 30 on the right wall of the threshing device 4. A recovery door 30A is provided at the base of the first lifting bin 30 for recovering grains remaining at the base, and a recovery door 31A is provided at the base of the second lifting bin 31 for recovering grains remaining at the base.

[0040] At the bottom of the grain tank 7, a conveying spiral tub 40 is provided to convey the grains that have leaked from the grain tank 7 to the rear side, and at the rear of the conveying spiral tub 40, a front communicating part 41 with a tapered right part is formed. In addition, a rear communicating part 42 is formed at the bottom of the vertical discharge tube 8A. When the grain tank 7 is moved to a storage position on the machine frame 1, the front communicating part 41 and the rear communicating part 42 are connected and communicated, and when the front part of the grain tank 7 is moved to an open position located to the right of the machine frame 1, the connection between the front communicating part 41 and the rear communicating part 42 is released and communication is also released. This allows the grains that have accumulated in the front communicating part 41 and the rear communicating part 42 to be collected. In this specification, the front communicating part 41 and the rear communicating part 42 are collectively referred to as the communicating part 43.

[0041] Exhaust gas combusted by the engine E is exhausted to the outside after impurities in the exhaust gas are purified by an exhaust purification device 50. The exhaust purification device 50 is formed of a DOC 51, which is a catalyst that oxidizes unburned gas in the exhaust gas, an SCR catalyst 52 that purifies nitrogen oxides in the exhaust gas exhausted from the DOC 51 by reducing them with ammonia generated from a urea aqueous solution (hereinafter referred to as urea water), an injection device 53 that injects urea water into a flexible pipe connecting the DOC 51 and the SCR catalyst 52, a supply device 54 that supplies urea water to the injection device 53, and a urea water tank 55 that stores the urea water supplied to the supply device 54. The injection device 53 and the supply device 54 are connected by a thin, flexible pipe, and the supply device 54 and the urea water tank 55 are also connected by a thin, flexible pipe.

[0042] <Compressed air piping diagram> 9, compressed air exhausted from compressor 60 is supplied to solenoid valve 61A. In addition, it is preferable to provide a pressure regulating valve for regulating the pressure of the compressed air, a drain for removing moisture from the compressed air, and a filter for removing dust from the compressed air in the flexible piping connecting compressor 60 and solenoid valve 61A.

[0043] When the solenoid of the solenoid valve 61A is excited, the compressed air supplied to the solenoid valve 61A is supplied to the solenoid valve 61B. In addition, when the solenoid of solenoid valve 61A is not excited, the compressed air supplied to solenoid valve 61A is supplied to a transfer shelf nozzle (referred to as the ``first nozzle'' in the claims) 62 provided toward the front of the transfer shelf 25A of the oscillating sorting device 25, a first lifting grain cylinder nozzle (referred to as the ``second nozzle'' in the claims) 63 provided from the first receiving barrel 27 toward the base of the first lifting grain cylinder 30, a second lifting grain cylinder nozzle (referred to as the ``third nozzle'' in the claims) 64 provided from the second receiving barrel 28 toward the base of the second lifting grain cylinder 31, a front communicating section nozzle (referred to as the ``fourth nozzle'' in the claims) 65 provided toward the front communicating section 41 of the conveying spiral barrel 40, and a rear communicating section nozzle (referred to as the ``fifth nozzle'' in the claims) 66 provided toward the rear communicating section 42 of the vertical discharge barrel 8A.

[0044] When the solenoid of solenoid valve 61B is excited, the compressed air supplied to solenoid valve 61B is supplied to solenoid valve 61C. When the solenoid of solenoid valve 61B is not excited, the compressed air supplied to solenoid valve 61B is supplied to nozzle 62 for the transfer rack, nozzle 63 for the first lifting grain cylinder, and nozzle 64 for the second lifting grain cylinder.

[0045] When the solenoid of the solenoid valve 61C is excited, the compressed air supplied to the solenoid valve 61C is supplied to the solenoid valve 61D, and when the solenoid of the solenoid valve 61C is excited, the compressed air is supplied to the solenoid valve 61E.

[0046] When the solenoid of solenoid valve 61D is excited, the compressed air supplied to solenoid valve 61D is supplied to transfer shelf nozzle 62 and sprayed from transfer shelf nozzle 62 toward transfer shelf 25A. When the solenoid of solenoid valve 61D is not excited, the compressed air supplied to solenoid valve 61D is supplied to first lifting grain cylinder nozzle 63 and second lifting grain cylinder nozzle 64 and sprayed from first lifting grain cylinder nozzle 63 toward the base of first lifting grain cylinder 30 and from second lifting grain cylinder nozzle 64 toward the base of second lifting grain cylinder 31.

[0047] When the solenoid of the solenoid valve 61E is excited, the compressed air supplied to the solenoid valve 61E is supplied to the solenoid valve 61F. When the solenoid of the solenoid valve 61E is not excited, the compressed air supplied to the solenoid valve 61E is supplied to the front communication part nozzle 65 and the rear communication part nozzle 66.

[0048] When the solenoid of the solenoid valve 61F is excited, the compressed air supplied to the solenoid valve 61F is supplied to the front communicating portion nozzle 65 and is ejected from the front communicating portion nozzle 65 toward the front communicating portion 41. When the solenoid of the solenoid valve 61F is not excited, the compressed air supplied to the solenoid valve 61F is supplied to the rear communicating portion nozzle 66 and is ejected from the rear communicating portion nozzle 66 toward the rear communicating portion 42.

[0049] <Controller connection diagram> As shown in FIG. 10, the controller 70 is formed from a processing unit 71 consisting of a CPU etc., a memory unit 72 consisting of a ROM, a RAM, a hard disk drive, a flash memory etc., a timer 73, and a communication unit 74 for data communication with the outside.

[0050] The processing unit 71 operates the solenoid valves 61A to 61D based on the operation mode switched by the mode changeover switch 13 and the like.

[0051] The memory unit 72 stores the compressed air ejection method in the cleaning mode, grain recovery mode, and working mode selected by the mode selector switch 13.

[0052] The timer 73 measures the elapsed time, which is input in advance by the monitor 11, for switching the solenoid valves 61D, 61F.

[0053] The communication unit 74 transmits and receives information to and from an external portable controller, etc.

[0054] The input side of the controller 70 is connected, via a specified input interface circuit, to a stalk sensor 3S that measures the presence or absence of stalks transported from the harvesting device 3 to the threshing device 4, an angle sensor 17S that measures the operating position of the harvesting and threshing lever 17, an angle sensor 18S that measures the operating position of the discharge lever 18, a mode change switch 13 that switches modes, and a layer thickness sensor 22S that measures the layer thickness of grains transported on the transfer shelf 25A of the oscillating sorting device 25.

[0055] The output side of the controller 70 is connected to the solenoid valves 61A to 61F via a predetermined output interface circuit.

[0056] <How to eject compressed air> 11, in step S1, the processing unit 71 of the controller 70 determines the operation state of the mode changeover switch 13. If it is determined that the mode changeover switch 13 is switched to the cleaning mode, the process proceeds to step S2, if it is determined that the mode changeover switch 13 is switched to the grain recovery mode, the process proceeds to step S5, and if it is determined that the mode changeover switch 13 is switched to the work mode, the process proceeds to step S11.

[0057] (Cleaning mode) In step S2, the processing unit 71 judges the input information from the stalk sensor 3S. If it is determined that the input information from the stalk sensor 3S is OFF and stalks are not being transported from the harvesting device 3 to the threshing device 4, the processing unit 71 proceeds to step S3, and if it is determined that the input information from the stalk sensor 3S is ON and stalks are being transported from the harvesting device 3 to the threshing device 4, the processing unit 71 repeats step S2.

[0058] In step S3, the processing unit 71 judges the input information from the layer thickness sensor 22S. If the input information from the layer thickness sensor 22S is OFF and it is judged that there are no grains leaking from the handling drum 21 onto the transfer shelf 25A of the oscillating sorting device 25, the processing unit 71 proceeds to step S4, and if the input information from the layer thickness sensor 22S is ON and it is judged that there are grains leaking from the handling drum 21 onto the transfer shelf 25A of the oscillating sorting device 25, the processing unit 71 repeats step S3.

[0059] In step S4, the processing unit 71 de-energizes the solenoid of the solenoid valve 61A by not energizing it, and supplies the compressed air supplied to the solenoid valve 61A to the transfer shelf nozzle 62, the first lifting grain bin nozzle 63, the second lifting grain bin nozzle 64, the front communicating portion nozzle 65, and the rear communicating portion nozzle 66 as shown in Fig. 9, and returns to step S1. This allows compressed air to be sprayed from the transfer shelf nozzle 62 toward the front of the transfer shelf 25A, from the first lifting grain bin nozzle 63 toward the base of the first lifting grain bin 30, and from the second lifting grain bin nozzle 64 toward the base of the second lifting grain bin 31, thereby removing stalk branches and the like that have accumulated in the front of the transfer shelf 25A, etc. In addition, compressed air can be sprayed from the front communicating portion nozzle 65 toward the front communicating portion 41 and from the rear communicating portion nozzle 66 toward the rear communicating portion 42, thereby removing stalk branches and the like that have accumulated in the conveying spiral tub 40.

[0060] (Grain recovery mode) In step S5, the processing unit 71 judges the input information from the stalk sensor 3S. If it judges that the input information from the stalk sensor 3S is OFF, the processing unit 71 proceeds to step S6, and if it judges that the input information from the stalk sensor 3S is ON, the processing unit 71 repeats step S5.

[0061] In step S6, the processing unit 71 judges the input information from the layer thickness sensor 22S. If it judges that the input information from the layer thickness sensor 22S is OFF, the processing unit 71 proceeds to step S7, and if it judges that the input information from the layer thickness sensor 22S is ON, the processing unit 71 repeats step S6.

[0062] In step S7, processing unit 71 judges the input information from angle sensor 17S. If it is determined from the input information from angle sensor 17S that the reaping device 3 and the thresher 4 are operating, the process proceeds to step S8, and if it is determined from the input information from angle sensor 17S that the reaping device 3 and the thresher 4 are not operating, the process proceeds to step S9.

[0063] In step S8, processing unit 71 energizes the solenoid of solenoid valve 61A to excite it, and does not energize the solenoid of solenoid valve 61B to de-energize it, and supplies the compressed air supplied to solenoid valve 61B to transfer shelf nozzle 62, first lifting grain cylinder nozzle 63, and second lifting grain cylinder nozzle 64 as shown in Fig. 9, and returns to step S1. This causes compressed air to be sprayed from transfer shelf nozzle 62 toward the front of transfer shelf 25A, transferring grains remaining on transfer shelf 25A backward and causing them to leak into the first receiving bucket 27 and the second receiving bucket 28. In addition, compressed air can be sprayed from the nozzle 63 for the first lifting grain canister toward the base of the first lifting grain canister 30, so that grains remaining in the first receiving bucket 27 can be collected from the recovery door 30A of the first lifting grain canister 30, and compressed air can be sprayed from the nozzle 64 for the second lifting grain canister toward the base of the second lifting grain canister 31, so that grains remaining in the second receiving bucket 28 can be collected from the recovery door 31A of the second lifting grain canister 31.

[0064] In step S9, the processing unit 71 judges the input information from the angle sensor 18S. If it is judged from the input information from the angle sensor 18S that the discharge auger 8 is operating, the process proceeds to step S10, and if it is judged from the input information from the angle sensor 18S that the discharge auger 8 is not operating, the process returns to step S1.

[0065] In step S10, the processing unit 71 energizes the solenoids of the solenoid valves 61A and 61B to excite them, and energizes the solenoids of the solenoid valves 61C and 61E to de-energize them, and then supplies the compressed air supplied to the solenoid valve 61E to the front communicating portion nozzle 65 and the rear communicating portion nozzle 66 as shown in Fig. 9, and returns to step S1. As a result, compressed air can be sprayed from the front communicating portion nozzle 65 to the front communicating portion 41 to recover grains remaining in the conveying spiral tub 40 from the gap between the front communicating portion 41 and the rear communicating portion 42, and compressed air can be sprayed from the rear communicating portion nozzle 66 to the rear communicating portion 42 to recover grains remaining in the vertical discharge tube 8A from the gap between the front communicating portion 41 and the rear communicating portion 42.

[0066] (Working mode) In step S11, the processing unit 71 judges the input information from the stalk sensor 3S. If it judges that the input information from the stalk sensor 3S is OFF, the processing unit 71 proceeds to step S12, and if it judges that the input information from the stalk sensor 3S is ON, the processing unit 71 repeats step S11.

[0067] In step S12, the processing unit 71 judges the input information from the layer thickness sensor 22S. If it judges that the input information from the layer thickness sensor 22S is OFF, the processing unit 71 proceeds to step S13, and if it judges that the input information from the layer thickness sensor 22S is ON, the processing unit 71 repeats step S12.

[0068] In step S13, processing unit 71 judges the input information from angle sensor 17S. If it is determined from the input information from angle sensor 17S that the reaping device 3 and the threshing device 4 are operating, the process proceeds to step S14, and if it is determined from the input information from angle sensor 17S that the reaping device 3 and the threshing device 4 are not operating, the process proceeds to step S18.

[0069] In step S14, processing unit 71 energizes the solenoids of solenoid valves 61A to 61D to excite them, and supplies the compressed air supplied to solenoid valve 61D to transfer shelf nozzle 62 as shown in Fig. 9, and proceeds to step S15. As a result, compressed air is sprayed from transfer shelf nozzle 62 toward the front of transfer shelf 25A, so that grains remaining on transfer shelf 25A can be transferred backward and dropped into the first receiving trough 27 and the second receiving trough 28.

[0070] In step S15, processing unit 71 determines the elapsed time measured by timer 73. If the elapsed time measured by timer 73 exceeds a preset elapsed time, processing proceeds to step S16, and if the elapsed time measured by timer 73 is equal to or less than the preset elapsed time, processing returns to step S14.

[0071] In step S16, the processing unit 71 energizes the solenoids of the solenoid valves 61A to 61C to excite them, and does not energize the solenoid of the solenoid valve 61D to de-energize it, and supplies the compressed air supplied to the solenoid valve 61D to the nozzle 63 for the No. 1 lifting grain cylinder and the nozzle 64 for the No. 2 lifting grain cylinder as shown in Fig. 9, and proceeds to step S17. As a result, compressed air is sprayed from the nozzle 63 for the No. 1 lifting grain cylinder toward the base of the No. 1 lifting grain cylinder 30, so that the grains remaining in the No. 1 receiving barrel 27 can be transferred to the conveying spiral of the No. 1 lifting grain cylinder 30 and lifted into the grain tank 7, and compressed air is sprayed from the nozzle 64 for the No. 2 lifting grain cylinder toward the base of the No. 2 lifting grain cylinder 31, so that the grains remaining in the No. 2 receiving barrel 28 can be transferred to the conveying spiral of the No. 2 lifting grain cylinder 31 and lifted into the No. 2 processing drum 32.

[0072] In step S17, processing unit 71 determines the elapsed time measured by timer 73. If the elapsed time measured by timer 73 exceeds a preset elapsed time, processing returns to step S1, and if the elapsed time measured by timer 73 is equal to or less than the preset elapsed time, processing returns to step S16.

[0073] In step S18, the processing unit 71 judges the input information from the angle sensor 18S. If it is judged from the input information from the angle sensor 18S that the discharge auger 8 is operating, the process proceeds to step S19, and if it is judged from the input information from the angle sensor 18S that the discharge auger 8 is not operating, the process returns to step S1.

[0074] In step S19, the processing unit 71 energizes the solenoids of the solenoid valves 61A, 61B, 61E, and 61F to excite them, and does not energize the solenoid of the solenoid valve 61C to de-energize it, and then supplies the compressed air supplied to the solenoid valve 61F to the front communication part nozzle 65 as shown in Fig. 9, and proceeds to step S20. As a result, compressed air is sprayed from the front communication part nozzle 65 to the front communication part 41, so that the grains remaining in the conveying spiral tub 40 can be transported to the front communication part 41 and discharged by the discharge auger 8 onto the bed of a work vehicle such as a truck.

[0075] In step S20, processing unit 71 determines the elapsed time measured by timer 73. If the elapsed time measured by timer 73 exceeds a preset elapsed time, processing proceeds to step S21, and if the elapsed time measured by timer 73 is equal to or less than the preset elapsed time, processing returns to step S19.

[0076] In step S21, the processing unit 71 energizes the solenoids of the solenoid valves 61A, 61B, and 61E to excite them, and does not energize the solenoids of the solenoid valves 61C and 61F to de-energize them, and supplies the compressed air supplied to the solenoid valve 61F to the rear communicating part nozzle 66 as shown in Fig. 9, and proceeds to step S22. As a result, the compressed air is sprayed from the rear communicating part nozzle 66 to the rear communicating part 42, so that the grains remaining in the vertical discharge tube 8A can be dropped into the rear communicating part 42 and discharged by the discharge auger 8 into the bed of a work vehicle such as a truck.

[0077] In step S22, the processing unit 71 determines the elapsed time measured by the timer 73. If the elapsed time measured by the timer 73 exceeds a preset elapsed time, the process returns to step S1, and if the elapsed time measured by the timer 73 is equal to or less than the preset elapsed time, the process returns to step S21. [Explanation of symbols]

[0078] 2 Running gear 3 Reaping device 3S Grain stalk sensor 4. Threshing equipment 5. Control Unit 6. Engine Room 7. Glentank 8. Discharge Auger 13 Mode switch 21 Handling body 22S Layer Thickness Sensor 25 Swinging Sorting Device 25A transfer shelf 27 No. 1 Receiving Bucket 28 No. 2 Receiving Tub 30 No. 1 fried grain cylinder 31 No. 2 fried grain cylinder 40 Spiral Transport Barrel 60 Compressor 61A Solenoid valve 61B Solenoid valve 61C Solenoid valve 61D Solenoid valve 61E Solenoid valve 61F Solenoid valve 62 Transfer shelf nozzle (No. 1 nozzle) 63 No. 1 Grain Cylinder Nozzle (No. 2 Nozzle) 64 No. 2 Grain Cylinder Nozzle (No. 3 Nozzle) 65 Front connecting nozzle (4th nozzle) 66 Rear connecting nozzle (5th nozzle) E-Engine

Claims

1. A combine harvester comprising: a threshing device (4) for threshing and sorting the stalks, provided at the rear left of a reaping device (3) for harvesting the stalks; a control section (5) for an operator to ride on, provided at the rear right of the reaping device (3); an engine room (6) for mounting an engine (E) provided below the control section (5); a grain tank (7) for storing sorted grain, provided at the rear of the control section (5); and a discharge auger (8) for discharging the stored grain to the outside, provided at the rear of the grain tank (7). A swinging sorting device (25) for sorting grains leaking from the threshing drum (21) of the threshing device (4) is provided below the threshing drum (21), and a first receiving tub (27) and a second receiving tub (28) for collecting the sorted grains are provided below the swinging sorting device (25). A compressor (60) is provided in the engine room (6); A conveying spiral tub (40) is provided at the bottom of the grain tank (7) to convey the grain to a discharge auger (8), A first grain lifting bin (30) is provided for lifting the grains collected in the first receiving tub (27) into the grain tank (7), and a second grain lifting bin (31) is provided for lifting the grains collected in the second receiving tub (28) into the transfer shelf (25A) of the swinging sorting device (25). This combine harvester is characterized by being provided with a first nozzle (62) that sprays compressed air supplied from the compressor (60) toward the transfer shelf (25A), a second nozzle (63) that sprays the air toward the base of the first grain lifting bin (30), a third nozzle (64) that sprays the air toward the base of the second grain lifting bin (31), a fourth nozzle (65) that sprays the air toward the rear of the conveying spiral tub (40), and a fifth nozzle (66) that sprays the air toward the base of the vertical discharge tub (8A) of the discharge auger (8).

2. 2. The combine harvester according to claim 1, wherein the steering section (5) is provided with a mode changeover switch (13) for operating solenoid valves (61A-61F) provided in piping paths between the compressor (60) and the first to fifth nozzles (62-66), and when the mode changeover switch (13) is set to a cleaning mode, compressed air is sprayed from the first to fifth nozzles (62-66), when the mode changeover switch (13) is set to a grain recovery mode, compressed air is sprayed alternately from the first to third nozzles (62-64) and the fourth and fifth nozzles (65, 66), and when the mode changeover switch (13) is set to a work mode, compressed air is sprayed alternately from the first to third nozzles (62-64) and compressed air is sprayed alternately from the fourth and fifth nozzles (65, 66).

3. A combine harvester as described in claim 2, wherein in the grain recovery mode and the working mode, compressed air is sprayed from the first to third nozzles (62-64) while the harvesting device (3) and the threshing device (4) are operating, and compressed air is sprayed from the fourth and fifth nozzles (65, 66) while the discharge auger (8) is operating.

4. A combine harvester as described in claim 1 or 2, wherein a layer thickness sensor (22S) for measuring a layer thickness of grains being transported on the transport shelf (25A) is provided on the underside of the handling drum (21), and when the layer thickness sensor (22S) measures a predetermined layer thickness, compressed air is not sprayed from the first to fifth nozzles (62 to 66).

5. A combine harvester as described in claim 1 or 2, wherein a stump sensor (3S) for measuring the stump transported from the harvesting device (3) to the threshing device (4) is provided at the rear of the harvesting device (3), and when the stump sensor (3S) measures a specified stump, compressed air is not sprayed from the first to fifth nozzles (62 to 66).

6. 2. The combine harvester according to claim 1, wherein the compressor (60) is detachably provided in the engine compartment (6).

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