JP2016220708A - Combine-harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure which prevents a grain level sensor from being affected by grains flying and flowing from an inflow port.SOLUTION: A combine-harvester comprises: a grain discharge device for discharging grains from a bottom part of a gain tank 16 for storing the grains to the outside; a temporary storage part 530 provided in the grain tank 16 for taking in the grains conveyed from a threshing device; a storage shutter 76 provided in the temporary storage part 530, whose position can change between a closed position for storage where the storage shutter is directed in a lateral direction to store the grains taken in and an open position for discharge where the storage shutter is directed downward to discharge the stored grains from the temporary storage part 530; a quality measurement part 5 for detecting the quality of the grains stored in the temporary storage part 530; and a shutter control part 92 for controlling the position change operation of the storage shutter 76.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a combine that measures the quality of a grain when the grain is harvested and threshed from a field while traveling, and the obtained grain is stored in a grain tank.

  In the combine by patent document 1, the receiving holding | maintenance part which creates the grain storage space which stores the grain sent to the grain tank temporarily is formed, and of the grain currently stored in the grain storage space Internal quality is measured by an optical internal quality measuring device. The bottom surface of the receiving and holding portion is formed by a swinging open / close bottom plate (shutter). The grains are temporarily stored in the closed state of the bottom plate, and the grains temporarily stored in the open state of the bottom plate are discharged. A supply (storage) state detection sensor that detects that a predetermined amount or more of grains has been stored is provided at the upper end portion inside the receiving and holding unit. In the lower region of the catch holding part, the presence or absence of a grain that detects whether or not the grain is present at the height level on the side wall of the grain tank at a position slightly below the lower end position of the open bottom plate A (grain level) sensor is provided. Every time the supply state detection sensor detects that a predetermined amount or more of the grain has been supplied to the receiving holder, a measurement process is performed by the internal quality measuring device. Then, after the bottom plate is switched to the open state and the grains are discharged, the bottom plate is returned to the closed state again, and the grains are stored. As the amount of grain in the grain tank increases, the tip of the bottom plate will eventually be buried in the grain, and the bottom plate cannot be switched from the open state to the closed state. If the presence of the kernel is detected, the measurement process is stopped.

JP 2013-118856 A

  In patent document 1, since the grain level sensor comprised by the electrostatic capacitance type proximity sensor is provided in the side wall of a grain tank, the influence of the grain which flows in flying from the inflow port of a grain tank May be erroneously detected. For this reason, there is a demand for a structure in which the grain level sensor is not easily affected by the grains that flow while flying from the inlet.

  In the combine according to the present invention, a grain tank for storing the grain conveyed from the threshing apparatus, and a grain discharging apparatus for discharging the grain stored in the grain tank from the bottom of the grain tank to the outside And a cylindrical formed body is provided in the grain tank. The cylindrical formed body forms a grain path, and the grain path takes in a part of the grain conveyed from the threshing device and the grain taken in from the intake At the bottom of the grain tank. The temporary storage part located in the middle of the said grain path | route is provided, and the storage shutter is provided in the said temporary storage part. The storage shutter has a closed storage position that is in a lateral orientation for storing the grains taken in from the intake port in the temporary storage unit, and a downward direction for discharging the stored grains from the temporary storage unit. The position can be changed to the open position for discharge which becomes the posture. The shutter lower distance, which is a distance between the lower end of the storage shutter in the downward posture and the upper surface of the grain stored in the kernel tank in the downward posture, has reached a predetermined value. A grain level detector to detect, and a quality measuring unit to detect the quality of the grain stored in the temporary storage unit, and further controls the position changing operation of the storage shutter and detects the grain level. A shutter control unit for stopping the position changing operation of the storage shutter based on a detection signal of the storage device.

  As the grain that is conveyed from the threshing device and released from the inlet of the grain tank is collected in the grain tank as the mowing and threshing operation starts, the upper surface level of the grain is pushed below the storage shutter. According to this configuration, the grain level detector that detects the upper surface level of the grain that hinders the operation of the storage shutter is provided in the grain path. That is, since the grain level detector is disposed inside the tubular formed body, the tubular formed body functions as a protective cover. As a result, the grain level detector is not easily affected by the grains that flow while flying from the inlet.

  In one preferred embodiment of the present invention, the cylindrical formed body has a first wall facing the center side of the grain tank and a second wall facing the wall body of the grain tank, The storage shutter is a swinging shutter that swings around a swinging shaft supported on the first wall, and the grain level detector is provided on the first wall. If the lower end of the storage shutter enters the grain stored in the grain tank when the storage shutter is in the release open position in the downward position, the operation of the storage shutter stops. For this reason, it is important to detect the upper surface level of the grain in the vicinity of the lower end of the storage shutter in the downward posture. In this configuration, the lower end of the downwardly facing storage shutter approaches the first wall, so that the upper surface level of the grain near the lower end can be accurately detected by the grain level detector provided on the first wall.

  In one preferred embodiment of the present invention, the grain level detector has a flat detection surface, and the grain level detector has the detection surface and the first wall flush with each other. Is arranged. With this configuration, since the grain level detector does not protrude into the grain path, it is avoided that the grain falling through the grain path is damaged by the grain level detector.

  In one preferred embodiment of the present invention, a second grain level detector for detecting that the shutter lower distance has reached a predetermined value different from the predetermined value is disposed in the grain path. ing. In this configuration, since there are two kernel level detectors in combination with the previous kernel level detector, it is possible to detect the upper surface level of the kernel with higher reliability. For example, if the second kernel level detector detects the same upper surface level of the kernel as the first kernel level detector, it is also effective as a countermeasure against a failure when one of them fails. Moreover, if the upper surface level of the grain detected by the 1st grain level detector and the 2nd grain level detector is made different, the detection result will be used separately for the caution warning and the emergency warning. be able to. In order to obtain the same advantages as the previously described kernel level detector (first kernel level detector), it is preferred that this second kernel level detector is also arranged in the kernel path.

  When the first kernel level detector and the second kernel level detector are arranged facing each other in the kernel path, the signals from the two kernel level detectors have entered the kernel path. The degree of inclination of the upper surface level of the grain can be estimated. By estimating the inclination of the upper surface level of the grain, the storage shutter can be driven and the quality of the grain can be measured until the grain enters the swinging locus of the storage shutter.

It is a schematic diagram which shows the basic composition for performing the grain quality measurement mounted in a combine. It is a schematic diagram which shows the basic principle of the control which determines the failure of the storage amount detector used at the time of grain quality measurement It is a side view which shows one of the embodiments of the combine by this invention. It is a top view of a combine. It is a cross-sectional top view which shows the front part of the grain tank mounted in the combine. It is a schematic diagram which shows a grain tank inside. It is a vertical side view of a measurement unit when the storage shutter provided in the cylindrical formation body provided in the grain tank is in a closed position. It is a vertical side view of the measurement unit when the storage shutter is in the open position. It is explanatory drawing explaining attachment of the measurement unit to a grain tank. It is a functional block diagram of the measurement control system built in the combine.

  Before describing a specific embodiment of a combine according to the present invention, a basic configuration for performing grain quality measurement performed in this combine will be described. FIG. 1 schematically shows a grain quality measuring mechanism provided on the wall of the grain tank 16. The measuring unit 30 includes a cylindrical formed body 53 and a quality measuring unit 5. In the upper part of the grain tank 16, an inlet 27 is formed from which the grain conveyed from the threshing device is discharged. The cylindrical formed body 53 has a first wall 531 facing the center side and a second wall 532 facing the wall of the grain tank 16, and creates a grain path 53 </ b> P extending in the vertical direction therein. ing. The upper opening of the grain path 53P functions as an intake 72 for taking in a part of the grain released from the inlet 27, and the lower opening of the grain path 53P is a grain taken from the intake 72. It functions as the discharge port 73 which discharges to the grain tank 16. A temporary storage unit 530 for temporarily storing the captured grain is formed in the middle of the grain path 53P. The temporary storage unit 530 releases the stored grain from the temporary storage unit 530, and the closed storage position for storing the grain taken in from the intake 72 into the temporary storage unit 530. Therefore, a storage shutter 76 that can be changed in position to an open position for discharge that assumes a downward posture is provided.

  The storage shutter 76 is switched to the storage closed position by a close command from the shutter control unit 92 constructed in the measurement control unit 9, whereby the grain is stored in the temporary storage unit 530. When the stored grain reaches an amount appropriate for the quality measurement, the stored amount detector 75 sends a storage completion signal to the measurement control unit 9. In response to the storage completion signal, a measurement start command is sent to the quality measuring unit 5. The quality measuring unit 5 sends a quality value as a measurement result to the measurement control unit 9. Next, the measurement control unit 9 sends a measurement end command to the quality measurement unit 5, and the shutter control unit 92 sends an open command to the storage shutter 76. As a result, the storage shutter 76 is switched to the release open position, and the grains stored in the temporary storage unit 530 are discharged. Such a series of quality measurement processes is repeated during the mowing and threshing process.

  When the grain in the grain tank 16 increases, the upper surface level of the grain approaches the outlet 73 and enters the grain path 53P. When the lower end of the storage shutter 76 enters the grain stored in the grain tank 16 when the storage shutter 76 is in the release open position where the storage shutter 76 is in the downward posture, the storage shutter 76 is loaded and stopped. . Before such a situation occurs, a grain level detector 41 is provided in order to stop the mowing threshing process and / or the grain quality measurement process. The grain level detector 41 detects that the distance between the lower end of the storage shutter 76 and the upper surface level of the grain in the downward posture (here, this distance is defined as the shutter lower distance) has reached a predetermined value. It is configured as follows. Therefore, when the grain level detector 41 detects that the shutter lower distance exceeds a predetermined value, it sends a level excess signal to the shutter control unit 92 as a detection signal. The shutter control unit 92 stops the position changing operation of the storage shutter 76 in response to the signal exceeding the level, and the measurement control unit 9 stops the grain quality measurement process.

  In the example shown in FIG. 1, an optional second kernel level detector 42 is shown in broken lines. In this example, the first grain level detector 41 described above is provided on the first wall 531, and the second grain level detector 42 is provided on the second wall 532. The two kernel level detectors 41 and 42 not only improve the detection reliability, but also estimate the gradient of the upper surface level of the kernel that has entered the kernel path 53P.

When the storage amount detector 75 that detects that the grain stored in the temporary storage unit 530 has reached an amount appropriate for the quality measurement fails, the storage completion signal cannot be sent, or the storage completion signal Will continue to be sent. Thereby, a grain quality measurement process becomes impossible.
Thus, the storage amount detector 75 is an important detector for the grain quality measurement process. The basic principle for detecting the failure detection of the storage amount detector 75 will be described with reference to FIG.

  Although simply depicted in FIG. 2, the configurations of the cylindrical formed body 53 and the storage shutter 76 that create the grain path 53 </ b> P and the temporary storage unit 530 are substantially the same as those in FIG. 1. Instead of omitting the grain level detector 41, a shutter position detector 79 for detecting the change position of the storage shutter 76 is shown. Moreover, the yield measuring device 35 which measures the yield of the grain stored in the grain tank 16 is shown. A failure determination unit 94 that is a core element for detecting a failure of the storage amount detector 75 is constructed in the measurement control unit 9. The failure determination unit 94 is based on the fact that the storage amount detector 75 does not output a storage completion signal even if the storage amount in the temporary storage unit 530 estimated based on the measurement result of the yield measuring device 35 exceeds the predetermined amount. A failure of the storage amount detector 75 is determined.

An example of the failure determination by the failure determination unit 96 is to determine a failure of the storage amount detector 75 based on the measurement result of the yield measuring device 35 over time and the detection result of the shutter position detector 79.
As described with reference to FIG. 1 and as schematically shown in FIG. 2, in the grain quality measurement process, the closing command from the shutter control unit 92 to the storage shutter 76, the storage amount detector 75. A series of control flow is executed in which the storage completion signal from, and the opening command from the shutter control unit 92 to the storage shutter 76 are sequentially repeated through the measurement start and measurement end. During this grain quality measurement process, the yield, which is the measurement result of the yield measuring device 35, is taken into the failure determination unit 94 over time. In FIG. 2, Q1, Q2, Q3, Q4... Are obtained continuously from the time when the closing command is output to the storage shutter 76 at a certain time. The amount of increase in grain from the output of this closing command to a specific time: q is the sum of the amount of increase in grain q1, q2, q3, ... in the grain tank 16 at each yield calculation time. can get. Alternatively, it can be obtained from the difference between the yield at a specific time and the yield at the time when the closing command is output. Since the ratio of passing through the grain path 53P among the grains released from the inflow port 27 is estimated in advance, the relationship between the grain increase amount: q and the storage amount in the temporary storage unit 530 is expressed as a function: f. Can be functionalized or tabulated. Therefore, the amount of grain increase in the grain tank 16 after the storage shutter 76 is closed is far beyond the value corresponding to the predetermined amount at which the storage completion signal is output by the storage amount detector 75. Regardless, if the storage completion signal is not output, it can be determined that the storage amount detector 75 is malfunctioning.

  Moreover, although the storage shutter 76 is changed from the storage closed position to the release open position, the storage amount detector 75 still outputs a storage completion signal even though the grain should have been discharged from the temporary storage unit 530. Even in the case of failure, the failure determination unit 94 can determine that the storage amount detector 75 has failed.

Next, one specific embodiment of a combine according to the present invention will be described with reference to the drawings.
FIG. 3 is a side view of a crawler traveling self-removing combine, and FIG. 4 is a plan view. The combine is provided with a traveling machine body 10 configured to be self-propelled by a pair of left and right crawler traveling devices 12 driven by the engine 11. The reaping unit 14 that harvests the planted cereals supported by the front part of the body frame 13 of the traveling body 10, the threshing device 15 that threshs the harvested cereals, and the grains threshed by the threshing device 15 are stored. A grain tank 16, an unloader 17 that is a grain discharging device that discharges the grains in the grain tank 16 to the outside, and a driving control unit 19 including a driver seat 18 on which a driver is seated are provided. ing.

  As shown in FIGS. 3 and 4, the grain tank 16 is disposed on the right side of the machine body with respect to the threshing device 15 in the machine frame 13 and is located behind the engine 11. A grain raising device 24 is provided on the left side of the grain tank 16. The whipping device 24 is arranged on the left side of the machine body in the grain tank 16. As shown in FIG. 3, FIG. 4, and FIG. 5, the cerealing device 24 lifts the grain conveyed from the threshing device 15 to the inlet 27 by the lifting screw 26. The grains that have been lifted up to the inflow port 27 are splashed off from the inflow port 27 by a rotary blade 28 that is integrally provided with the lifting screw 26 and is driven to rotate counterclockwise. Fly and fall while being diffused. Most of the grains supplied from the inflow port 27 are supplied to the internal space M in the grain tank 16. A part of the grain supplied from the inflow port 27 is disposed in the front part of the grain tank 16 and supplied to the measurement unit 30 that measures the quality of the grain stored in the grain tank 16. In this way, the grain conveyed from the threshing device 15 is stored in the grain tank 16.

  As shown in FIGS. 3, 4, and 5, the bottom of the grain tank 16 has a discharge auger that is configured to discharge the grain stored in the grain tank 16 to the outside. 32 is provided. The discharge auger 32 is operated by the driving force of the engine 11. The grain stored in the grain tank 16 is discharged from the rear part of the grain tank 16 by the discharge auger 32 and discharged to the outside through the unloader 17 shown in FIGS.

  As shown in FIGS. 3 and 4, the front portion of the grain tank 16 is configured to measure the yield of the grain in the grain tank 16 based on the weight of the grain tank 16. A load cell is provided as the yield measuring device 35.

  As shown in FIG. 6, the grain tank 16 is provided with a level sensor group 37 that detects the accumulation level of the grains in the grain tank 16. The level sensor group 37 is composed of four level sensors arranged from below to above.

  As shown in FIG. 9, the measuring unit 30 is fitted and fixed to the mounting hole 45 </ b> A of the front wall 45 of the grain tank 16 via a vibration-proof rubber 47 for sealing. The measuring unit 30 includes a cylindrical formed body 53 and a quality measuring unit 5. As shown in FIGS. 5-8, the quality measurement part 5 is provided with the box-shaped measurement chamber housing 52 in which the quality sensor 50 which measures the quality of a grain was incorporated. The tubular formed body 53 includes a temporary storage unit 530 for temporarily storing the grains for which quality measurement is performed by the quality sensor 50.

  As shown in FIG. 9, a housing 55 that houses the quality sensor 50 is attached to the measurement chamber housing 52. The housing 55 houses a main body case 56 that houses the quality sensor 50 and a filter case 57 that is detachable from the main body case 56. The filter case 57 is configured to be detachably connected to the main body case 56 by a buckle-type connector 66. The coupling tool 66 is provided at each of the upper end portion and the lower end portion of the main body case 56, and is configured to be connected to and disconnected from the upper end portion and the lower end portion of the filter case 57.

  As shown in FIG. 7 and FIG. 8, the tubular forming body 53 includes a first wall 531 facing the inner space M of the grain tank 16, a pair of left and right side walls 533, and the quality measuring unit 5. It is a cylindrical body having a rectangular cross section composed of the second wall 532 facing toward it. In this embodiment, the second wall 532 is also used as a vertical plate portion facing the inner space M of the measurement chamber housing 52. Of course, the second walls 532 may be provided individually. Due to the structure of the cylindrical formed body 53, a vertically extending grain path 53P is created therein, and a temporary storage portion 530 is formed in the middle of the grain path 53P. The grain path 53P has an upper inlet 72 for taking in the grain and a lower outlet 73 for discharging the grain.

As shown in FIGS. 7 and 8, the temporary storage unit 530 is configured to be able to temporarily store a part of the grains that have been transported from the threshing device 15 and jumped off by the rotary blades 28. Temporary storage unit 530 takes in a part of the grain that has been conveyed from threshing device 15 from intake 72 formed in the upper part of temporary storage unit 530 and temporarily stores it, in the lower part of temporary storage unit 530. The grain stored in the temporary storage unit 530 can be discharged from the formed outlet 73 to the internal space M in the grain tank 16. In the upper part of the temporary storage unit 530, a storage amount detector 75 including a proximity sensor that detects the grain is provided on the side wall 533 of the tubular formed body 53.
A storage shutter 76 that closes or opens the discharge port 73 is provided below the temporary storage unit 530. A quality sensor 50 that detects the quality of the grains stored in the temporary storage unit 530 faces the temporary storage unit 530.

  As shown in FIGS. 7 and 8, the discharge number securing area 534 is created as a part of the grain path 53 </ b> P and adjacent to the lower part of the storage shutter 76. For this reason, the number-of-discharges securing area 534 differs from the internal space M of the grain tank 16 in the degree of grain accumulation. The grain level detector 41 described in detail with reference to FIG. 1 is provided on the first wall 531 in the lower end region of the discharge count securing region 534. The volume of the number-of-discharges securing area 534 is preferably more than doubled so as to be larger than the temporary storage volume of the grains that can be stored above the storage shutter 76. The grain level detector 41 is arranged such that its detection surface 410 is flush with the inner surface of the tubular formed body 53, that is, the inner surface of the first wall 531. A second grain level detector 42 is provided on the second wall 532, and the detection surface 420 is also arranged so as to be flush with the inner surface of the tubular formed body 53, that is, the inner surface of the second wall 532. Has been.

  As shown in FIGS. 7 and 8, when the measurement unit 30 is fitted and fixed in the grain tank 16, the quality sensor 50 comes to be located in the grain tank 16. That is, the quality sensor 50 is provided in the grain tank 16. The quality sensor 50 measures the quality of the grain stored in the grain tank 16. The quality sensor 50 performs quality measurement on the grains temporarily stored in the temporary storage unit 530. The quality sensor 50 is an optical detection method, and is configured to be able to measure the internal quality such as the moisture value and protein value of a stationary grain without contact.

  The storage shutter 76 is configured as a plate-like swinging type. The storage shutter 76 is switched between a storage closed position in a horizontal posture and a discharge open position in a downward vertical posture by a switching mechanism 80 configured by a cam or the like by driving a motor 78. The storage shutter 76 swings around a lateral support shaft 81 that intersects the opening / closing direction of the storage shutter 76. The support shaft 81 is supported by the first wall 531 of the tubular formed body 53.

  FIG. 10 is a functional block diagram of the measurement control system constructed in this combine. This functional block diagram controls a detector group provided in the measurement unit 30, a measurement control unit 9 as a core element of the measurement control system, an input signal processing unit 9A as a data input interface, and various operation devices. A device control unit 9B is shown. The measurement control unit 9, the input signal processing unit 9A, and the device control unit 9B are interconnected by an in-vehicle LAN or other data transmission line. The measurement control unit 9 uses the basic principle of measurement control described with reference to FIG. 1 and the basic principle of failure determination described with reference to FIG.

  The input signal processing unit 9A includes a measurement value signal from the yield measuring unit 35, quality value data from the quality measuring unit 5, a storage completion signal from the storage amount detector 75, a shutter position signal from the shutter position detector 79, An over-level signal or the like from the first grain level detector 41 or the second grain level detector 42 is input. Further, a signal from a switch related to measurement control such as a measurement start switch (not shown) is also input. The signal input to the input signal processing unit 9A undergoes necessary preprocessing and is transferred to the measurement control unit 9.

  The device control unit 9B gives an open command and a close command to various operating devices controlled by the measurement control unit 9, for example, the storage shutter 76, and a measurement start command and a measurement end command to the quality measurement unit 5.

  In the measurement control unit 9, a monitoring module 90, a yield calculation unit 91, a shutter control unit 92, a quality measurement management unit 93, and a failure determination unit 94 are substantially constructed by software. The monitoring module 90 has a function unit that receives signals from various detectors via the input signal processing unit 9A and monitors various states in the measurement control described with reference to FIGS. For example, the storage monitoring unit 901 monitors the storage state of the grains in the temporary storage unit 530 based on a signal from the storage amount detector 75. Based on the signal from the shutter position detector 79, the shutter position monitoring unit 902 monitors whether the storage shutter 76 is in the storage closed position or the discharge open position. The grain level monitoring unit 903 monitors the upper surface level of the grain entering from the discharge port 73 of the tubular formed body 53 based on the signals from the grain level detectors 41 and 42.

  The yield calculation unit 91 calculates the yield from the measurement value signal of the yield measuring device 35, which is a load cell, using a measurement value / yield conversion table. In this embodiment, the yield calculation unit 91 has a function of calculating an increase in yield from a specified start time to a specified end time based on the yield calculated at a predetermined sampling time.

  The quality measurement management unit 93 commands the quality measurement unit 5 to start measurement and end measurement in cooperation with the shutter control unit 92 and the monitoring module 90. In addition to this, there is also a function of linking and recording the grain moisture and protein component amounts obtained from the quality value data from the quality measuring unit 5 and a specific point in the field obtained from this combine traveling locus data. Have.

  The failure determination unit 94 has a function of performing the failure determination of the storage amount detector 75 described with reference to FIG. 2 in cooperation with the monitoring module 90, the yield calculation unit 91, and the like. Since the function description is as described above, the description is omitted here.

[Another embodiment]
(1) In the above-described embodiment, proximity sensors are used as the storage amount detector 75 and the grain level detectors 41 and 42. However, the present invention is not limited to this, and it is possible to detect a grain such as a contact sensor. If available. In the above-described embodiment, the two grain level detectors 41 and 42 are provided at the same height, but may be provided at different heights.
(2) In the above-described embodiment, the cylindrical formed body 53 is about twice the amount of grain that can be stored in the temporary storage unit 530 from the lower end of the storage shutter 76 at the release open position to the discharge port 73. Although the volume is secured, instead of this, the length may be shortened only to the length at which the grain level detector 41 is provided at the lower end of the storage shutter 76 at the release open position.
(3) In the above-described embodiment, the cylindrical formed body 53 and the quality measuring unit 5 are integrated with each other. However, separate structures independent of each other may be used.
(4) The division of the functional units shown in FIG. 10 is an example, and the integration of the functional units and the division of the functional units are arbitrary. Any configuration is possible as long as the control function of the present invention is realized, and these functions can be realized by hardware and / or software.

  The present invention can be used not only for a self-removing combine but also for a full throwing type combine. In addition to the crawler travel combine, it can also be used for a wheel travel combine.

14: Cutting part 15: Threshing device 16: Grain tank 30: Measuring unit 35: Yield measuring device 37: Level sensor group 41: Grain level detector (first grain level detector)
42: 2nd grain level detector 5: Quality measurement part 50: Quality sensor 52: Measurement chamber housing 53: Cylindrical formation body 53P: Grain path | route 530: Temporary storage part 531: 1st wall 532: 2nd wall 533: Side wall 534: Discharge count securing area 72: Intake port 73: Discharge port 75: Storage amount detector 76: Storage shutter 79: Shutter position detector 9: Measurement control unit 90: Monitoring module 91: Yield calculation unit 92: Shutter control section 93: Quality measurement management section 94: Failure determination section 96: Failure determination section 901: Storage monitoring section 902: Shutter position monitoring section 903: Grain level monitoring section

Claims (1)

A grain tank for storing the grains conveyed from the threshing device;
A grain discharging device for discharging the grains stored in the grain tank from the bottom of the grain tank to the outside;
A temporary storage unit that is provided in the grain tank and takes in the grain that has been conveyed from the threshing device;
A closed position for storage that is provided in the temporary storage unit and is in a lateral orientation to store the captured grains in the temporary storage unit, and a downward posture to release the stored grains from the temporary storage unit A storage shutter that can be changed to an open position for discharge,
A quality measuring unit for detecting the quality of the grains stored in the temporary storage unit;
A combiner comprising: a shutter control unit that controls a position changing operation of the storage shutter.

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