JP6715595B2 - combine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a combine that evaluates the amount of grains obtained by threshing a grain culm that has been cut while running.

In the combine according to Patent Document 1, the grain sensor is arranged below the grain that has been conveyed above the grain tank by the screw conveyor from the charging port, and based on the signal from this grain sensor. Grain amount is continuously detected. Although the structure of the grain sensor is not disclosed, it can be read from FIG. 1 of Patent Document 1 that it is a sensor that generates a signal by collision with a grain that naturally falls. In this way, when detecting the grains that fall naturally, if the amount of conveyed grains fluctuates, even if the grain density in the peripheral area of the natural fall trajectory changes, the grains in the central area of the natural fall trajectory will change. The grain density may not change much. Therefore, the measurement of the transport amount of grain becomes inaccurate. In addition, since the combine is swaying while it is running, the flow of the grains that naturally falls also sways. This also makes accurate measurements difficult.

The combine according to Patent Document 2 is provided with a rotary blade that discharges the grain sent from the threshing device by the screw conveyor from the grain discharge port, and is discharged inside the grain tank by the rotary blade. A sensor is provided that detects the impact with the grain using a strain gauge. The grain amount is calculated by the control unit from the strain gauge based on the voltage. Even with this configuration, the relationship between the amount of impact and the amount of grain due to the flow of grains released by the rotary blade tends to fluctuate, and it becomes difficult to accurately measure the state of transportation of the grains.

JP, 2000-354416, A JP-A-2005-204806

In view of the above situation, there is a demand for a technique for simply and accurately continuously detecting the amount of grains sent from the threshing device to the grain tank.

The combine according to the present invention, a threshing device, a grain tank for storing grains after threshing by the threshing device, a grain transport mechanism for transporting grains from the threshing device to the grain tank, and the grain A grain discharging device having a discharge case provided in the end region of the transport mechanism and provided with a grain discharge port, and a discharge rotating body rotatably arranged in the discharge case, and immediately before the grain discharge by the discharge rotating body. A pressing action portion that receives a pressing force by the grain, a load detector that detects the pressing force that acts on the pressing action portion, and a yield evaluation unit that evaluates the grain transportation amount from the detection signal of the load detector. Equipped with
The yield evaluation unit evaluates the grain transportation amount per rotation cycle based on the detection signal in the rotation cycle of the discharge rotor, and the maximum value of the detection signal obtained for each rotation cycle is a unit. by integrating the time to travel the distance traveled, we evaluate the grain conveyance amount in the unit travel distance.

According to this configuration, the grain sent from the threshing device to the grain tank by the grain transport mechanism is discharged into the grain tank from the grain discharge port by the rotational movement of the discharging rotating body. When being moved to the grain discharge port by the rotational movement of the discharge rotor, the grains are pressed against the discharge rotor. The pressing force exerted on the grain by the discharge rotating body (hereinafter, abbreviated as pressing) increases as the amount of the grain increases and decreases as the amount of the grain decreases. Therefore, when the load applied to the pressing action portion is detected by the load detector, the grain transport amount from the threshing device to the grain tank can be evaluated from the detection signal. The evaluation amount of the grain transport amount includes data indicating the grain amount (yield) per unit time, data indicating the time-dependent increase/decrease change in the grain yield, and the like.
Further, the fluctuation of the pressure generated in the pressure acting portion depends on the rotation of the discharge rotating body. That is, the detected load changes according to the rotation angle of the discharge rotating body. Therefore, it is preferable in terms of measurement engineering to process the detection signal in consideration of the rotation cycle of the discharge rotator and evaluate the grain transport amount. At that time, since the detection signal has a periodicity, it is preferable that the evaluation of the grain transport amount is based on the maximum value of the detection signal in a predetermined period. The periodicity of this detection signal corresponds to the rotation cycle of the emitting rotor.

The pressure applied to the grain when the grain is discharged by the discharge rotating body is transmitted to the discharge case via the grain. From this, it is possible to satisfactorily evaluate the grain transport amount by detecting the load applied to the discharge case. Therefore, in one of the preferred embodiments of the present invention, a plate-shaped member is attached as the pressing portion at a position in the discharge case immediately before the grain discharge port in the grain conveying direction. The pressing force of the grains passing between the discharge rotating body and the pressing action part acts on the pressing action part.

In order to reliably detect the load applied to the plate-shaped member with a simple configuration, a combination of a pressure sensitive plate that is elastically deformed by the load and a load cell that detects strain of the pressure sensitive plate is suitable. At that time, the load detecting structure is simplified by using the plate member as the pressure sensitive plate. Therefore, in one of preferred embodiments of the present invention, the plate-shaped member is formed as a pressure-sensitive plate extending along the rotation direction of the discharge rotating body, and the load detector is a load cell attached to the pressure-sensitive plate. is there.

In one preferred embodiment of the present invention, the discharge case is a tubular body having a cylindrical portion centered on a rotation axis of the discharge rotating body and extending along the rotation axis. Yes, a grain discharge port is provided in a part of the inner peripheral surface of the cylindrical body, in the inner peripheral surface, in the peripheral surface portion located in front of the grain discharge port in the rotation direction of the discharge rotating body. The pressing action portion is provided. The fluctuation of the pressure exerted by the discharging rotating body on the discharging case via the grain becomes remarkable in the vicinity of the grain discharging port. Therefore, it is advantageous to arrange the pressing portion near the grain discharge port in order to obtain high detection accuracy.

As a simple and suitable structure of the discharging rotary body, the discharging rotary body is a rotary blade composed of a rotary shaft and a blade plate provided on the rotary shaft, and the rotary blade has a grain pushing surface for pushing the grain in the rotation direction. It is suggested to have. In that case, in order to suitably detect and evaluate the load that fluctuates periodically, as a preferred embodiment of the present invention, a rotation angle sensor that detects the rotation angle of the rotary blade is provided, and the rotation angle sensor is provided. Is a sensor for detecting a circumferential specific point of the rotary blade, the yield evaluation unit calculates the rotation cycle of the discharge rotor from the circumferential specific point, and a detection signal in the rotation cycle of the discharge rotor. It is proposed that the maximum value generation area of is the evaluation area by the yield evaluation unit.

It is a right view of a combine. It is a top view of a combine. It is a combine rear view explanatory drawing which shows a grain conveyance mechanism and a grain tank. It is a left side view explanatory view of a combine showing a grain transportation mechanism and a grain tank. It is a longitudinal section of a grain discharge device. It is a perspective view of a grain discharge device. It is explanatory drawing explaining the continuous behavior of the detection signal from the load detector 41 at the time of grain discharge. It is a functional block diagram which shows the function of a control unit. It is an exploded perspective view showing another embodiment of a grain discharge device. It is a top view showing another embodiment of a grain discharge device.

One of specific embodiments of the combine according to the present invention will be described with reference to the drawings.
FIG. 1 is a side view of an ordinary combine harvester which is an example of a combine harvester, and FIG. 2 is a plan view thereof. The combine has a machine body frame 10 in which a plurality of steel materials such as a channel material and a square pipe material are connected. A lower part of the machine body frame 10 is equipped with a pair of right and left crawler type traveling devices 11. An engine 15 is mounted on the front side of the right half portion of the machine body frame 10, and a cabin-configured operating section 13 is formed on the upper side thereof.

A steering lever 18, a monitor 19 and the like are arranged in the driving unit 13. At the front of the machine frame 10, a mowing unit 12 is vertically movable, and at the rear of the machine frame 10, a threshing device 14 for throwing all the mowing grain culms supplied from the mowing unit 12 to thresh. And a grain tank 2 for storing the grains supplied from the grain removing device 14 by the grain transport mechanism 16 and an unloader 17 for discharging the grains stored in the grain tank 2 to the outside.

The mowing unit 12 is configured to be able to move up and down around the first horizontal axis X1 in the lateral direction of the machine body, and the mowing unit 12 is in an ascending state during non-harvesting work such as turning, and descending close to the field scene during harvesting work. It becomes a state. The cut culms cut by the cutting unit 12 are conveyed to the front end of the threshing device 14.

The threshing device 14 is configured to perform a threshing process on the cut culm conveyed from the reaping section 12 by the rotating drum 14a. The grain tank 2 is arranged at the right rear part on the machine body frame 10, and is located on the right side of the threshing device 14 on the right side and on the rear side of the operation part 13.
A grain conveying mechanism 16 that conveys grains from the threshing device 14 to the grain tank 2 is arranged between the threshing device 14 and the grain tank 2.

As shown in FIGS. 3 and 4, the grain transfer mechanism 16 includes a first-item recovery screw 14A provided at the bottom of the threshing device 14, a lifting conveyor 16A, and a horizontal transfer conveyor 16B. The unloading conveyor 16A is erected substantially vertically in order to feed the grains discharged from the threshing device 14 upward. The lifting conveyor 16A is a bucket conveyor in which a plurality of buckets 164 are mounted at regular intervals on the outer peripheral side of an endless rotation chain 163 wound around a drive sprocket 161 and a driven sprocket 162.

The lifting conveyor 16A is a bucket conveyor that sends the grains discharged from the threshing device 14 upward. The lateral feed conveyor 16B is a screw conveyor that is connected to the transport end portion of the lifting conveyor 16A and feeds the grains transferred from the lifting conveyor 16A into the grain tank 2. The lateral conveyor 16B extends laterally from the upper end of the lifting conveyor 16A and is inserted into the upper part of the front side of the left side wall 2b of the grain tank 2, and the outer peripheral part has a circular cross-sectional shape (octagonal or other shapes). It is enclosed by a casing 165 (which may be rectangular). The lateral feed conveyor 16B includes a screw shaft 166 and a screw body 167 fixed to the screw shaft 166.

A grain discharging device 3 that diffuses and discharges the grains into the grain tank 2 is provided in the end region of the lateral feed conveyor 16B. The grain discharging device 3 includes a discharging rotating body 32 and a discharging case 31 that covers the periphery of the discharging rotating body 32. The discharge rotary body 32 is a rotary blade including a rotary shaft 321 extended from the screw shaft 166 and a blade plate 322 provided on the rotary shaft 321. The blade plate 322 is fixed to the rotary shaft 321 so as to project radially outward from the rotary shaft 321. The blade 322 has a substantially flat extrusion surface that extrudes the grains in the rotation direction. The discharge case 31 has a cylindrical shape having an inner diameter slightly larger than the rotation locus of the blade plate 322. A part of the peripheral surface of the discharge case 31 is cut out. The notch forms a grain discharge port 30 (see FIG. 5) that discharges the grain toward the rear side inside the grain tank 2 by the rotation of the blade 322.

The screw shaft 166 and the rotating shaft 321 integrally rotate around the horizontal axis X2. In this embodiment, the rotation direction is set to the left rotation based on the line of sight of the screw shaft 166 from the base end side toward the tip end side along the horizontal axis X2. That is, the blade plate 322 rotates counterclockwise in FIG.

In this embodiment, since the rotation locus diameter of the vane plate 322 and the rotation locus diameter of the screw body 167 are substantially the same, the discharge case 31 is a cylindrical body and is formed as an extension of the casing 165 of the lateral feed conveyor 16B. Has been done. The discharge case 31 is formed to have a diameter larger than that of the casing 165 of the lateral feed conveyor 16B when the diameter of the rotation trajectory of the blade plate 322 is larger than the diameter of the rotation trajectory of the screw body 167, and in the opposite case, the discharge case 31 is formed. Is formed to have a diameter smaller than that of the casing 165 of the lateral feed conveyor 16B.

As shown in FIGS. 5 and 6, the grain discharge port 30 is substantially the width of the blade plate 322 in the axial direction of the discharge case 31, and is approximately one quarter in the rotational direction from the lower end in the circumferential direction of the discharge case 31. It is a cutout opening that extends the length of the circumference. The grain pushed by the blade 322 is discharged from the discharge case 31 into the grain tank 2 through the grain discharge port 30. In order to create a nozzle that defines the discharge direction of the grain discharged from the discharge case 31, it extends in the tangential direction of the rotation trajectory of the blade 322 from the discharge case 31 to the edges on both sides in the circumferential direction of the grain discharge port 30. A discharge guide piece 311 is formed.

As shown in FIG. 6, in the circumferential wall portion of the discharge case 31 located in front of the grain discharge port 30 in the rotation direction of the blade plate 322, within the axial width of the blade plate 322, in the rotation direction of the blade plate 322. An opening extending along the opening is provided, and a pressing action portion 40 formed of a plate-shaped member is attached to the opening. At this time, in order to prevent a step from being formed between the inner surface of the peripheral wall of the discharge case 31 and the inner surface of the pressing action portion 40, a structure in which the pressing action portion 40 is fitted in the opening may be adopted. Further, a load cell is provided on the outer surface of the pressing action portion 40 as a load detector 41 that detects the load applied to the pressing action portion 40. When the blades 322 release the grains, the pressure applied to the grains by the rotational force of the blades 322 is transmitted to the pressing action unit 40 via the grains. The pressure generated by this pressing causes strain in the pressing action portion 40. The pressing of the grain by the blades 322 increases as the amount of grain conveyed by the grain conveying mechanism 16 increases. Therefore, the electric signal generated in the load cell due to the strain of the pressing action portion 40 has a strength that depends on the amount of the conveyed grains (the amount of the harvested grains: the yield). It can be handled as a detection signal for evaluating the fluctuation and quantity of the coming grain.

In this embodiment, the plate-shaped member that constitutes the pressing portion 40 functions as a part of the peripheral wall of the discharge case 31, and also functions as a pressure-sensitive plate that detects pressure fluctuations due to increase and decrease of grain. Therefore, as the load detector 41 that detects the load applied to the pressing action portion 40, it is possible to use other pressure-sensitive sensors other than the load cell.

Further, as shown in FIG. 6, a rotation angle sensor 91 that detects the rotation period of the blade plate 322, that is, the period of the rotation shaft 321, is arranged around the rotation shaft 321. The rotation angle sensor 91 is a sensor that optically or magnetically detects an object to be detected such as a protrusion provided at a specific position in the circumferential direction of the rotation shaft 321, and based on this detection signal, the rotation angle sensor 91 rotates around the rotation shaft 321. A pulse signal is generated that indicates the passage time of the direction specific point, and consequently the passage time of the vane plate 322.

FIG. 7 shows the temporal behavior of the detection signal from the load detector 41 when the grain is discharged. The upper graph of FIG. 7 schematically shows the detection signal (voltage from the load cell) output by the load detector 41 during one rotation of the blade plate 322 (one cycle). Immediately after the blade plate 322 has passed the pressing portion 40, a large pressure (load) is not applied to the pressing portion 40, so that the detection signal shows a low level. Grains that are continuously fed from the lateral feed conveyor 16B to the grain discharging device 3 are pushed toward the grain discharging port 30 by the rotating blade plate 322. When the blade plate 322 passes through the pressing action portion 40, the force due to the pressing by the blade plate 322 becomes the strongest in the pressing action portion 40, and at that time, the detection signal of the load detector 41 is the maximum value (max) in one cycle. Indicates.

In FIG. 7, the blade 322 operates the pressing portion 40 during the period from the generation of the pulse signal based on the detection signal of the rotation angle sensor 91 to the generation of the next pulse signal (hereinafter, also referred to as a pulse section). It passes only once, and a peak that should be detected as the maximum value (max) (a peak immediately before grain release) occurs once in each pulse section. Here, the timing at which a peak, which should be detected as the maximum value (max) (hereinafter, also referred to as peak timing), may shift slightly before and after the blade plate 322 rotates once.
Therefore, if it is configured that the timing at which the pulse signal is generated and the timing at which the detection signal of the load detector 41 reaches the maximum value (max) are close to each other, the maximum value (max) may occur due to the peak timing shift. An event may occur in which no single peak is included in one pulse section or two or more peaks are included in one pulse section. Therefore, in this embodiment, as shown in FIG. 7, the vane plate 322 is configured to pass the pressing portion 40 and reach a peak timing at a time point near the center of the pulse section. According to this configuration, even if the peak timing deviates slightly before and after, one pulse section that does not include one peak that should be detected as the maximum value (max), or two peaks in one pulse section It is unlikely that an event such as the above will be included.

The lower graph of FIG. 7 schematically shows a detection signal (voltage from the load cell) output by the load detector 41 during a plurality of rotations of the blade plate 322 (a plurality of cycles). The fluctuation of the maximum value (max) in each cycle represents the fluctuation of the amount of grains sent by the horizontal feed conveyor 16B, that is, the fluctuation of the harvest amount (yield) in the unit of small section of the field.

Therefore, the detection signal from the load detector 41 is subjected to signal processing including filter processing, and the preset yield is calculated from the maximum value (max) calculated for each rotation (one cycle) of the blade plate 322. The yield per unit travel distance can be derived using the derivation map 63. The content of the yield derivation map 63 is changed depending on the traveling speed of the combine, the rotation speed of the blade 322, the type of grain, and the like. The simplest yield derivation map 63 is a linear relationship between the maximum value (max) and the yield per unit time (one rotation of the blade 322). The yield per unit travel distance, that is, the yield per unit distance in the field is obtained from the yield per unit time and the traveling speed of the combine derived using this. Furthermore, the yield per unit area (small section) of the field can be obtained from the yield per unit distance and the combine cutting width.

The cutting position (harvest position) of the grain culm in the combine field during the cutting operation can be acquired using GPS or the like. The delay time until the grain extracted by the threshing process from the cut grain culm is discharged from the grain discharge port 30 is obtained in advance, and the traveling locus of the combine during this delay is traced. It is possible to determine a field microcompartment to which the yield per unit area (microcompartment) is allocated. This finally allows the production of grain yield distributions in the field.

When the blade 322 rotates a plurality of times in a small section (unit travel distance) of the field to which the yield is to be allocated, the maximum value (max) obtained for each rotation (each cycle) is integrated.

FIG. 8 shows a part of the functional blocks of the combine control unit 5. The control unit 5 includes a travel control unit 51 that controls devices related to travel, a work control unit 52 that controls devices related to the working device, and an input signal processing unit 53 as modules that control the operation of each device of the combine. ing. Further, the control unit 5 is constructed with a yield evaluation unit 6 as a functional module relating to yield measurement. The control signals generated by the traveling control unit 51 and the work control unit 52 are sent to various devices via the device control unit 54. The input signal processing unit 53 receives a signal from a human-operated device, a signal from a work state detection sensor group 9 such as a sensor or a switch that detects the state of a device forming a combine, and a detection signal from a load detector 41 that is a load cell. Is entered. Then, the input signal processing unit 53 converts these inputs into a required data format, and then transfers them to each functional unit of the control unit 5. The combine has a GPS unit 90 for detecting the position of the own vehicle. The direction information acquired by the GPS unit 90 is also input to the control unit 5.

In this embodiment, the yield evaluation unit 6 includes a maximum value calculation unit 61, a yield calculation unit 62, a yield derivation map 63, and a yield distribution calculation unit 64. The detection signal of the load detector 41, which is a load cell, that has been subjected to amplification processing and filtering processing by the input signal processing unit 53 is input to the maximum value calculation unit 61. The maximum value calculation unit 61 further receives a signal from the rotation angle sensor 91 that detects the rotation cycle of the blade plate 322 of the grain discharging device 3 via the input signal processing unit 53, and the maximum value for each cycle ( max) is calculated.

In this embodiment, one blade plate 322 is provided on the rotating shaft 321, and one pulse is generated each time the rotating shaft 321 makes one rotation based on the detection signal from the rotation angle sensor 91. That is, one maximum value (max) is calculated for each rotation cycle of 360 degrees. The relationship between the time when this pulse occurs and the time when the maximum value (max) occurs can be calculated in advance. Therefore, it is possible to set a maximum value generation region having a predetermined time width as a gate and use this maximum value generation region as an evaluation region for calculating the maximum value (max).

The yield derivation map 63 is a lookup table for deriving the grain amount per unit time sent by the transverse feed conveyor 16B, using the maximum value (max) in one cycle of the blade 322 as an input. When the rotation speed of the blade plate 322 is selectable, a look-up table is prepared for each rotation speed, or the output value is corrected by a correction coefficient set according to the rotation speed. The yield calculation unit 62 obtains the grain amount (yield) per unit time from the maximum value (max) calculated by the maximum value calculation unit 61 using the yield derivation map 63. Further, it is also possible to obtain the vehicle speed and the cutting width of the combine to obtain the grain amount (yield) per unit travel distance or unit area.

The yield calculation unit 62 calculates the field position where the culm corresponding to the grain subjected to the yield calculation was cut based on the position information from the GPS unit 90, and the calculated position information and the calculated grain amount. (Yield) is related and recorded as grain yield state information. The yield distribution calculation unit 64 allocates a yield for each minute section of the field based on the grain yield state information to generate a grain yield distribution.

[Another embodiment]
(1) In the above-described embodiment, the yield is handled as the grain yield state information, but instead of this, the yield variation, that is, the variation data of the maximum value (max) may be used as the grain yield state information. .. In this case, the grain yield distribution is relative data indicating the amount of yield in the unit of microdivision. The absolute value of the yield in the field can be obtained from the measurement result of the grain amount performed when the grain is unloaded from the grain tank 2.

(2) In the above-described embodiment, the pressing action portion 40 and the load detector 41 are provided in a part of the discharge case 31 of the grain discharging device 3 provided on the extension of the lateral feed conveyor 16B. Since the form of the grain discharging device 3 differs depending on the type of combine, in the present invention, the form of the grain discharging device 3 and the shapes and arrangements of the pressing action portion 40 and the load detector 41 are limited to the above-described embodiment. Not done. For example, in FIGS. 9 and 10, the grain discharging device 3 is provided at the upper end of the screw conveyor type feeding conveyor 16A that conveys the grains from the bottom of the threshing device 14 to above the grain tank 2. The grain discharging device 3 includes a blade plate 192 provided along the axial direction at the upper end of the shaft body 191 of the screw conveyor 190 that constitutes the lifting conveyor 16A, and a blade cover 193 that covers the blade plate 192. ing. The blade cover 193 has an opening in a region facing a portion of the rotation path of the blade plate 192 facing the inside of the grain tank 2, and this opening serves as the grain discharge port 30 of the grain. The blades 192 of the grains conveyed by the screw conveyor 190 bounce the grains from the grain discharge port 30 toward the inside of the grain tank 2. The blade cover 193 has a shape such that the bounced-off grains are stored in the grain tank 2 in a horizontally distributed state as uniform as possible. On the side wall of the blade cover 193, a plate-like pressing action portion 40 and a load detector 41 by a load cell are attached to the place where the grain is sandwiched between the blade cover 193 and the blade 192 when the grain is discharged. Since the grain conveyed by the lifting conveyor 16A is pressed against the side wall of the blade cover 193 by the blade 192, a load corresponding to the amount of the grain is applied to the pressing action portion 40. The load detector 41 (load cell) detects the load applied to this side wall.

(3) In the above-described embodiment, the rotary shaft 321 is provided with one blade plate 322, but the rotary shaft 321 may be provided with a plurality of blade plates 322. At that time, the vane plates 322 are preferably arranged at equal intervals in the circumferential direction. In this case, the rotation phase interval at which the peak (peak immediately before the grain release) that should be detected as the maximum value (max) occurs is not 360 degrees, but 360 degrees divided by the number of blades 322. Becomes In order to detect each peak as the maximum value (max), the rotation cycle of the rotary shaft 321 corresponds to the allocation pitch of the blade plates 322 in the rotation direction of the rotary shaft 321, and is equal to the number of blade plates 322. Section (hereinafter referred to as a division section). In that case, if the blade plate 322 passes the pressing portion 40 at the time of the vicinity of the center of each divided section and the peak timing is reached, the maximum value (max) can be obtained even if the peak timing is slightly shifted forward or backward. It is unlikely that a peak that should be detected as “1” is not included in one divided section or that two or more peaks are included in one divided section. In order to divide the rotation cycle of the rotating shaft 321, it is sufficient to set a plurality of specific points so as to correspond to each blade plate 322. In that case, the rotation angle sensor 91 generates as many pulses as the number of blades 322 for each rotation of the rotation shaft 321. As a result, the rotation cycle of the rotating shaft 321 is divided into the same number of pulse sections as the number of blades 322.

(4) In the above-described embodiment, the blade plate 322 has a flat plate shape, but various shapes such as a curved body can be adopted.

INDUSTRIAL APPLICABILITY The present invention can be applied to a combine in which the grain after the threshing process is stored in the grain tank by the grain conveying mechanism.

2: Grain tank 10: Machine frame 12: Harvesting unit 14: Threshing device 16: Grain transport mechanism 16A: Lifting conveyor 16B: Side-feeding conveyor 161: Drive sprocket 162: Driven sprocket 166: Screw shaft 167: Screw body 190 : Screw Conveyor 191: Shaft 192: Blade 193: Blade Cover 3: Grain Discharge Device 30: Grain Discharge Port 31: Discharge Case 311: Discharge Guide Piece 32: Discharge Rotator 321: Rotation Shaft 322: Blade 40 : Pushing action part 41: Load detector 5: Control unit 51: Travel control part 6: Yield evaluation part 61: Maximum value calculation part 62: Yield calculation part 63: Yield derivation map 64: Yield distribution calculation part 9: Work state detection Sensor group 90: GPS unit 91: Rotation angle sensor

Claims (6)

Threshing device,
A grain tank for storing grains after threshing by the threshing device,
A grain transport mechanism that transports grains from the threshing device to the grain tank,
A grain discharging device having a discharge case provided in the end region of the grain conveying mechanism and provided with a grain discharge port, and a discharge rotating body rotatably arranged in the discharge case,
A pressing action portion that receives a pressing force by the grain immediately before the grain is discharged by the discharge rotating body,
A load detector for detecting the pressing force acting on the pressing portion,
And yield evaluation unit for evaluating the grain conveyance amount from the detection signal of the load detector, is provided, et al is,
The yield evaluation unit evaluates the grain transportation amount per rotation cycle based on the detection signal in the rotation cycle of the discharge rotor, and the maximum value of the detection signal obtained for each rotation cycle is a unit. A combine that evaluates the grain transportation amount in the unit traveling distance by integrating the traveling distance in the traveling time . As the pressing action portion, in the discharge case, at a position immediately before the grain discharge port in the grain transport direction, a plate-shaped member is attached,
The combine according to claim 1, wherein the pressing force of the grains passing between the discharge rotating body and the pressing action part acts on the pressing action part. The combiner according to claim 2, wherein the plate-shaped member is formed as a pressure-sensitive plate extending along a rotation direction of the discharge rotating body, and the load detector is a load cell provided on the pressure-sensitive plate. The discharge case has a cylindrical portion centering on the rotation axis of the discharge rotating body, and is a tubular body extending along the rotation axis,
A grain discharge port is provided on a part of the inner peripheral surface of the tubular body,
4. The pressing portion is provided on a peripheral surface portion of the inner peripheral surface, which is located in front of the grain discharge port in the rotation direction of the discharge rotating body. Combine. Said discharge rotary body is rotating blade made of slats provided on the rotary shaft and the rotary shaft, the rotary blade one any of claims 1 to 4 having a grain extrusion surface extruding the grain in the rotating direction The combine according to the section. A rotation angle sensor for detecting a rotation angle of the rotary blade is provided,
The rotation angle sensor is a sensor for detecting a circumferential specific point of the rotary blade,
The yield evaluation unit calculates a rotation cycle of the emission rotor from the circumferential specific point, and sets a maximum value generation region of a detection signal in the rotation period of the emission rotor as an evaluation region by the yield evaluation unit. The combine harvester according to Item 5 .

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