JP2016171754A - Combine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine which can improve a filling rate of a storage part storing grains.SOLUTION: The combine includes: a threshing device threshing reaped grain culms; a storage part storing grains threshed by the threshing device; a grain-lifting conveyor conveying the grains threshed by the threshing device to an upper side; and a screw conveyor arranged in a horizontal direction in the storage part and throwing the grains conveyed by the grain-lifting conveyor to the storage part. The screw conveyor includes: a first throwing blade parallel to an axis of the screw conveyor; and a second throwing blade extended in a direction intersecting the axis of the screw conveyor.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a combine that harvests and thresh cereal grains and stores the threshed grains.

  When harvesting grains such as soybeans and corn, a combine that harvests and thresh cereal grains and collects grains is often used. The combine travels on the field with a crawler, and harvests the culm with a cutting blade during the travel, conveys the harvested culm to the handling cylinder, and threshes. Then, the combine performs sorting of the cocoons and grains separated from the cereal at the chaff sheave disposed below the handling cylinder, and causes the selected grains to leak from the chaff sheave. The leaked grain is conveyed upward by a bucket conveyor.

  The grain conveyed by the bucket conveyor is conveyed inside the grain tank by a screw conveyor extending in the horizontal direction. A throwing plate is provided at the end of the screw conveyor, and the grain is thrown downward by the throwing plate (see, for example, Patent Document 1).

JP 2012-115213 A

  In the combine grain tank, the grain is piled up most under the screw conveyor. Therefore, when the grains are piled up to the vicinity of the screw conveyor, the screw conveyor must be stopped even if the filling rate in the grain tank is smaller than the desired filling rate.

  This invention is made | formed in view of such a situation, and it aims at providing the combine which can improve the filling rate of the storage part which stores a grain.

  The combine according to the present invention transports the threshing device for threshing the harvested culm, the storage unit for storing the threshed grain by the threshing device, and the grain threshed by the threshing device upward In the combine comprising: a cereal conveyor, and a screw conveyor that is disposed along the horizontal direction in the storage unit and that feeds the grains conveyed by the cereal conveyor into the storage unit; The conveyor has a first throwing blade parallel to the axis of the screw conveyor and a second throwing blade extending in a direction intersecting the axis of the screw conveyor.

  In this invention, since the attitude | positions of a 1st throwing blade and a 2nd throwing blade are different, a grain is skipped in each different upward direction, for example, a back diagonally upward direction and a front diagonally upward direction.

  The combine which concerns on this invention is provided in the ceiling of the said storage part in the said storage part, The grain amount detection part which detects the grain amount thrown in by the said 1st throwing blade or the 2nd throwing blade, The grain amount during a contact period of the grain to the passage detection unit that detects passage of the first throwing blade or the second throwing blade and the grain amount detection unit that is determined based on a detection result of the passage detection unit And a correction unit that corrects the detection result detected by the detection unit based on the detection result detected by the grain amount detection unit outside the period.

  In the present invention, the grain amount can be detected by applying the grain to the grain amount detection unit. Moreover, since the grain quantity detection part is provided in the ceiling of the storage part, a grain quantity detection part is not buried.

  The combine which concerns on this invention is provided with the guide part which guides the grain thrown in by the said 2nd throwing blade.

  In the present invention, the grains thrown by the second throwing blades are diffused forward, for example, in the storage portion by the guide portion.

  The combine which concerns on this invention is provided with the processus | protrusion which makes cross-sectional inverted triangle shape in the ceiling of the said storage part in the said storage part.

  In the present invention, the grains thrown by the second throwing blades are applied to the protrusions, so that, for example, they are diffused left and right in the storage section.

  Since the first throwing blade and the second throwing blade cause the grains to fly in different upward directions, uneven distribution of the grains in the storage portion can be prevented and the storage rate can be improved.

It is a perspective view which briefly shows the combine concerning an embodiment. It is front sectional drawing which briefly shows the structure of a cereal conveyor and screw conveyor vicinity. It is right side sectional drawing which shows the structure of a cereal conveyor and screw conveyor vicinity. It is a perspective view which outlines a conveyance part and a screw conveyor. It is an expansion perspective view which outlines the composition near a screw conveyor. It is a block diagram which shows the structure of a control part. It is a table which shows the relationship between the engine speed and the coefficient β. It is an example of the graph which shows the relationship between the detection value of a grain amount detection sensor, and the detection value of a pickup sensor. It is a flowchart which shows the grain amount calculation process by CPU. It is a flowchart which shows the correction value calculation process by CPU. It is a partial expansion perspective view which briefly shows the inner side of the storage tank in the combine which changed the structure of the protrusion partially.

  Hereinafter, the present invention will be described with reference to the drawings showing a combine according to an embodiment. FIG. 1 is a perspective view schematically showing a combine. The combine includes a crawler 1 that travels in a field, and a chassis 20 is provided on the crawler 1. A threshing device 2 for threshing cereals is provided on the chassis 20, and a reaping part 4 for reaping the cereals through a feeder chamber 3 is provided in front of the threshing device 2. On the right side of the threshing device 2, a grain tank 5 (storage part) for storing the grain is provided, and an operation room 6 is provided on the front side of the grain tank 5.

  At the upper part of the grain tank 5, a discharge auger 9 for conveying the grains stored in the grain tank 5 to the outside is provided. The discharge auger 9 has a cylindrical shape, and a screw-type conveyor is provided therein.

  In the threshing apparatus 2, a handling cylinder for threshing the cereal basket and an oscillating sorting apparatus (both not shown) for selecting the grains threshed by the handling cylinder are arranged vertically. A screw-type transport unit 8 (see FIG. 4) is provided below the swing sorting device with the axial direction set to the left and right. A bucket-type threshing conveyor 7 is erected at the right end of the transport unit 8. The conveyance part 8 conveys a grain from the left side to the right side. In addition, the threshing device 2, the feeder chamber 3, the reaping unit 4, the cerealing conveyor 7, and the conveying unit 8 are driven by power from an engine (not shown).

  The cereal grains harvested by the mowing unit 4 are conveyed through the feeder chamber 3 and threshed by the threshing device 2. The grains separated from the cereal grains by threshing are conveyed by the conveying unit 8 and the cereal conveyor 7 and put into the grain tank 5.

  2 is a front cross-sectional view schematically showing the configuration near the cereal conveyor 7 and the screw conveyor 10, FIG. 3 is a right side cross-sectional view schematically showing the configuration near the cereal conveyor 7 and the screw conveyor 10, and FIG. 8 and a perspective view schematically showing the screw conveyor 10, and FIG. 5 is an enlarged perspective view schematically showing a configuration in the vicinity of the screw conveyor 10. In FIG. 3, the end face plate 15b is not shown.

  The cereal conveyor 7 is wound between a box-like casing 70 that is long in the vertical direction, two sprockets 71 and 72 that are pivotally supported in the casing 70 so as to be spaced apart in the vertical direction, and both sprockets 71 and 72. A conveyor chain 73 and a plurality of buckets 74 fixed to the conveyor chain 73. The lower sprocket 72 is connected to the transport unit 8, and rotates clockwise when viewed from the right side due to the rotation of the transport unit 8. When viewed from the right side, the conveyor chain 73 also rotates clockwise, and the bucket 74 also rotates.

  A screw conveyor 10 is provided on the front side of the cereal conveyor 7. The screw conveyor 10 extends in the left-right direction, and the right part thereof is located in the grain tank 5.

  The screw conveyor 10 extends in the left-right direction, and has a semi-cylindrical casing 15 opened on the upper side thereof. The screw conveyor 10 is disposed inside the casing 15. The shaft 13 extends in the left-right direction. The first screw 11 spirally provided on the outer peripheral surface and the second screw provided spirally on the outer peripheral surface of the shaft 13 and disposed at an axial position different from the axial position of the first screw 11 12. The first screw 11 and the second screw 12 are arranged in a double spiral shape on the outer peripheral surface of the shaft 13.

  The diameter of the right end portion of the casing 15 is larger than the diameter of other portions, and the right end portion forms a large diameter portion 15a. The front-rear dimension of the large-diameter part 15a is larger than the front-rear dimension of the other part, and the bottom part of the large-diameter part 15a is positioned below the bottom part of the other part. A pickup sensor 16 (passage detector) is provided on the rear side of the bottom of the large diameter portion 15a. The pickup sensor 16 is a magnetic sensor having a Hall element or the like.

  An end face plate 15b perpendicular to the shaft 13 is provided at the right end of the large diameter portion 15a. A bearing 15c is provided at the center of the end face plate 15b. The right end portion of the shaft 13 is rotatably supported by the bearing 15c. The left end of the shaft 13 is connected to a drive source (for example, a motor) (not shown). The shaft 13 rotates about the axis by the power from the drive source.

  A first throwing blade 11 a is provided at the right end of the first screw 11. The first throwing blade 11 a has a plate shape parallel to the shaft 13 and protrudes from the shaft 13 in the radial direction. When the shaft 13 rotates, the first throwing blade 11a rotates in a state in which the tip portion of the first throwing blade 11a approaches the inner peripheral surface of the large diameter portion 15a. The first throwing blade 11a is made of a magnetic material, and the pickup sensor 16 detects the passage of the first throwing blade 11a when the first throwing blade 11a passes.

  The right end portion of the first screw 11 is located on the right side of the right end portion of the second screw 12. A second throwing blade 12 a is provided at the right end of the second screw 12. As shown in FIG. 2, the second throwing blade 12 a has a plate shape extending in a direction intersecting the shaft 13 so as to form an inclination angle θ with respect to the axis of the shaft 13. An example of the inclination angle θ is 45 degrees. In FIG. 2, the second throwing blade 12 a when located on the lower side is indicated by a broken line.

  The casing 15 is provided with a guide plate 14 (guide portion) at a position corresponding to the second throwing blade 12 a in the axial direction of the shaft 13. The guide plate 14 is provided at the upper rear end of the casing 15. As shown in FIG. 3, the guide plate 14 protrudes from the casing 15 in a forward inclined posture toward a diagonally upward upper side.

  As shown in FIG. 2, the ceiling in the grain tank 5 is provided with a protrusion 51 that extends in the front-rear direction and protrudes downward. The cross-sectional shape of the protrusion 51 having a cut surface that is parallel to the left-right direction is an inverted triangle. Further, as shown in FIG. 3, a grain amount detection sensor 52 (a grain amount detection unit) is provided on the ceiling. The grain amount detection sensor 52 includes a strain gauge and a circuit board. The grain amount detection sensor 52 may have any configuration that can detect the impact value of the collided grain. For example, a piezoelectric element may be provided instead of the strain gauge.

  As shown in FIG. 2, a push-type switch 55 that detects that the grain is full is provided on the upper side surface in the grain tank 5. The push switch 55 is located below the screw conveyor 10.

  The input of the grain into the grain tank 5 will be described. The grains transported to the cereal conveyor 7 by the transport unit 8 are transported upward by the bucket 74. At this time, the opening of the bucket 74 faces upward. The bucket 74 is turned back by the upper sprocket 71 to change the moving direction downward. At this time, the opening of the bucket 74 faces downward, and the grains in the bucket 74 are thrown into the screw conveyor 10.

  The grain put into the screw conveyor 10 is conveyed into the grain tank 5 by the first screw 11 and the second screw 12. Since the first screw 11 and the second screw 12 are arranged in a double spiral shape, each of the first screw 11 and the second screw 12 individually conveys the grain.

  As shown by a solid line arrow in FIG. 3, the grain conveyed by the first screw 11 is thrown back obliquely upward by the first throwing blade 11 a at the right end portion of the first screw 11, and the amount of grain is detected. Collides with sensor 52.

  As shown by the solid line arrow in FIG. 2, a part of the grain conveyed by the second screw 12 is thrown diagonally right upward by the second throwing blade 12a at the right end of the second screw. The thrown-up grain collides with the protrusion 51, and is dispersed and lowered to the left and right.

  Further, as shown by the broken line arrow in FIG. 3, a part of the grain conveyed by the second screw 12 is thrown forward and obliquely along the guide plate 14 or hits the guide plate 14.

  Based on outputs from the grain amount detection sensor 52 and the pickup sensor 16, a control unit 100 that calculates the grain amount stored in the grain tank 5 is mounted on the combine. FIG. 6 is a block diagram showing the configuration of the control unit 100, and FIG. 7 is a table showing the relationship between the engine speed and the coefficient β.

  The control unit 100 includes a CPU (Central Processing Unit) 100a, a ROM (Read Only Memory) 100b, a RAM (Random Access Memory) 100c, and an EEPROM (Electrically Erasable and Programmable Read Only Memory) 100d connected to each other by an internal bus 100g. ing. The CPU 100a reads a control program stored in the ROM 100b into the RAM 100c, and executes a grain amount calculation according to the control program. The CPU 100a has a built-in timer.

  The EEPROM 100d stores an LUT (Look Up Table) 100h. The LUT 100h stores a table showing the relationship between the engine speed and the coefficient β (see FIG. 10). The table includes an “engine speed” column and a “coefficient β” column, and each row of each column stores an engine speed and a value of a coefficient β corresponding to the engine speed (β1 to β6). Has been. The engine speed corresponds to the speed of the sprockets 14 and 15. The number of rotations indicates the number of rotations per unit time (for example, 1 minute).

  Further, a correction variable X is set in the EEPROM 100d, and a value is stored in the correction variable X as necessary. Further, a threshold value α for determining whether or not the detection value of the grain amount detection sensor 52 is included in the calculation target of the grain amount is set.

  On the power transmission path from the engine to the mowing unit 4 and the threshing device 2, a mowing / threshing clutch 46 for cutting or connecting the power transmission path is provided. An engine speed sensor 40 for detecting the engine speed is provided near the engine output shaft. A dashboard panel (not shown) is provided in the cab 6, and a cutting switch 80 for cutting and threshing, a display unit 83 for displaying information, and the like are arranged on the dashboard panel.

  The control unit 100 outputs a disconnection / connection signal to the mowing / threshing clutch 46 via the output interface 100f. Further, the control unit 100 outputs a display signal indicating that a predetermined video is displayed on the display unit 83 via the output interface 100f.

  Output signals of the cutting switch 80, the grain amount detection sensor 52, the pickup sensor 16, the engine speed sensor 40, and the push switch 55 are input to the control unit 100 via the input interface 100e. In response to the turning on / off of the cutting switch 80, the cutting / threshing clutch 46 is disconnected / connected.

  When a signal is input to the control unit 100 from the push switch 55, the control unit 100 outputs a signal to the display unit 83, and the display unit 83 displays information indicating that the grain tank 5 is full. Thereby, the operator can easily recognize that the grain tank 5 is full. When the grain tank 5 is full, the operator generally ends the harvesting operation. Therefore, when the pressing switch 55 is pressed, the harvesting operation is completed, and it is possible to reliably avoid the screw conveyor 10 and the grain amount detection sensor 52 from being buried in the grain.

  CPU100a integrates the detection value which concerns on the output signal of the grain quantity detection sensor 52, determines whether it includes in the integration | accumulation object compared with the threshold value (alpha). Then, the detection value included in the integration target is stored in the EEPROM 100d in synchronization with the detection value related to the output signal of the pickup sensor 16. FIG. 8 is an example of a graph showing the relationship between the detection value of the grain amount detection sensor 52 and the detection value of the pickup sensor 16.

  FIG. 8A is a graph showing the relationship between time and the detection value of the grain amount detection sensor 52. The detection value of the grain amount detection sensor 52 indicates the amount of distortion due to the collision of the grains, and is a moving average value at a predetermined sampling number. FIG. 8B is a graph showing the relationship between time and the detection value of the pickup sensor 16. The detection value of the pickup sensor 16 indicates the starting point of the grain input period by the bucket 74. In the following description, the subscript of the period P in FIG. 8 is omitted as appropriate.

  The detection value of the pickup sensor 16 is detected as a pulse wave, and after the passage of one vane plate after the passage of the pulse wave, the period until the passage of one vane plate, in other words, the passage of one vane plate. This corresponds to the period P. The CPU 100a takes in the detection value of the grain amount detection sensor 52 at a predetermined cycle (for example, 100 [ms]) corresponding to the cycle P, and stores it in the EEPROM 100d. The CPU 100a creates a time stamp each time a pulse wave is input from the pickup sensor 16, and associates the time stamp with the detection value input from the grain amount detection sensor 52 when the pulse wave is input. And stored in the EEPROM 100d.

  In FIG. 8, when the grain is put into the grain tank 5 by the bucket 74, the grain collision from the grain amount detection sensor 52 to the CPU 100a during P / 4 to 3P / 4 (contact period). The detected value is input. The detection value input to the CPU 100a from the kernel amount detection sensor 52 between 0 to P / 4 and 3P / 4 to P is a detection value when the kernel does not collide with the kernel amount detection sensor 52. . The grain amount detection sensor 52 instantaneously collides with the grain between P / 4 to 3P / 4, and the grain between 0 to P / 4 and 3P / 4 to P (non-contact period). Will not collide.

  In FIG. 8A, the threshold value α corresponds to a detection value detected by the grain amount detection sensor 52 due to disturbances such as the temperature characteristics of the grain amount detection sensor 52 and the inclination of the machine body. When the grain is not thrown into the grain tank 5 by the screw conveyor 10, ideally, a detected value due to the collision of the grain from the grain amount detection sensor 52 to the CPU 100a during P / 4 to 3P / 4. Is not entered. However, actually, a detection value (threshold value α) due to disturbance is input from the grain amount detection sensor 52 to the CPU 100a.

CPU100a compares the detection value input from the grain amount detection sensor 52 between P / 4-3P / 4, and threshold value (alpha). When the detected value includes a value exceeding the threshold value α, the CPU 100a determines that the detected value input between P / 4 to 3P / 4 is to be integrated (period P in FIG. 8A). ₁ , areas of broken line hatched portions at P ₂ and P ₅ ). The value to be integrated corresponds to an impulse due to the collision of the grain with the grain amount detection sensor 52.

When the detected value does not include a value that exceeds the threshold value α, the CPU 100a excludes the detected value input between P / 4 to 3P / 4 from the targets to be integrated (in FIG. 8A, the period P). ₃ and P ₄ parts).

  On the other hand, the value obtained by integrating the detection values of the grain amount detection sensor 52 between 0 and P / 4 and 3P / 4 and P (the area of the solid line hatched portion in FIG. 8A) corresponds to a steady deviation. The steady deviation is caused by engine vibration, vibration propagated to the grain amount detection sensor 52 while traveling in an uneven field, characteristics of the grain amount detection sensor 52, and the like.

  The CPU 100a performs processing necessary for a value obtained by integrating the detection values of the grain amount detection sensor 52 between 0 to P / 4 and 3P / 4 to P in a predetermined cycle (for example, 1 [s]), and the EEPROM 100d To store in the correction variable X.

  The CPU 100a accesses the EEPROM 100d, refers to the time stamp, and integrates the detected values of the grain amount detection sensor 52 between P / 4 and 3P / 4. Then, the steady deviation included in the integrated value is removed using the value stored in the correction variable X. For example, the value stored in the correction variable X is subtracted from the integrated value.

  The CPU 100a stores the correction value D from which the steady deviation is removed in the RAM 100c. And the coefficient (beta) is applied to the correction value D, and the grain quantity stored in the grain tank 5 is calculated | required.

  Next, the grain amount calculation processing by the CPU 100a will be described. FIG. 9 is a flowchart showing the grain amount calculation processing by the CPU 100a.

  The CPU 100a takes in a signal from the cutting switch 80, determines whether or not the cutting switch 80 is turned on (step S1), and waits until the cutting switch 80 is turned on (step S1: NO). When the cutting switch 80 is on (step S1: YES), the CPU 100a takes in a signal from the engine speed sensor 40 (step S2). The CPU 100a accesses the EEPROM 100d and refers to the LUT 100h (step S3), and determines a coefficient β (β1 to β6) corresponding to the engine speed indicated by the signal taken from the engine speed sensor 40 (step S4).

  And CPU100a takes in a signal from pickup sensor 16 and grain amount detection sensor 52 (Step S5), and accumulates impulses between P / 4-3P / 4 (Step S6). At this time, the CPU 100a accesses the EEPROM 100d, refers to the time stamp, and integrates the detection values of the grain amount detection sensor 52 between P / 4 and 3P / 4. The detection values are sequentially input from the grain amount detection sensor 52 to the control unit 100 at a constant sampling period, and the CPU 100a inputs the time between P / 4 to 3P / 4 by referring to the time stamp. The detected value can be recognized.

  Next, the CPU 100a determines whether or not the detection value input between P / 4 to 3P / 4 includes a detection value that exceeds the threshold value α (step S7). When the detected value exceeding the threshold value α is not included (step S7: NO), the CPU 100a advances the process to step S12.

  When the detected value exceeding the threshold value α is included (step S7: YES), the CPU 100a accesses the EEPROM 100d, refers to the correction variable X (step S8), and corrects the calculated impulse with the correction variable X ( Step S9), a correction value D is obtained. For example, the CPU 100a subtracts the value stored in the correction variable X from the calculated impulse. Note that subtraction is an example of correction, and multiplication or division may be performed based on a value stored in the correction variable X.

  Then, the CPU 100a applies the coefficient β to the correction value D (Step S10). For example, the correction value D is multiplied or added by the coefficient β. The multiplication or addition of the coefficient β is an example of application of the coefficient β, and is not limited to this. Next, the CPU 100a integrates the correction value D after applying the coefficient β (step S11). The integrated value in step S <b> 11 corresponds to the amount of grain stored in the grain tank 5. Then, the CPU 100a takes in a signal from the cutting switch 80 and determines whether or not the cutting switch 80 is off (step S12). When the cutting switch 80 is not off (step S12: NO), that is, when the cutting switch 80 is on, the CPU 100a returns the process to step S2. When the cutting switch 80 is off (step S12: YES), the CPU 100a ends the process. In addition, the grain amount calculation process mentioned above can be performed as a real-time process performed within the period P. Note that the determination in step S7 may be performed after step S5. Further, the process of step S10 may be omitted and the correction value D may be integrated.

  Next, correction value calculation processing by the CPU 100a will be described. FIG. 10 is a flowchart showing correction value calculation processing by the CPU 100a.

  The CPU 100a takes in a signal from the cutting switch 80, determines whether the cutting switch 80 is turned on (step S21), and waits until the cutting switch 80 is turned on (step S21: NO). When the cutting switch 80 is on (step S21: YES), signals are acquired from the pickup sensor 16 and the grain amount detection sensor 52 (step S22), and impulses between 0-P / 4 and 3P / 4-P are obtained. Are integrated (step S23). At this time, the CPU 100a accesses the EEPROM 100d, refers to the time stamp, and integrates the detection values of the grain amount detection sensor 52 between 0-P / 4 and 3P / 4-P. The detection values are sequentially input from the grain amount detection sensor 52 to the control unit 100 at a constant sampling period, and the CPU 100a refers to 0 to P / 4 and 3P / 4 to P by referring to the time stamp. It is possible to recognize the detection value input during the period.

  Then, the CPU 100a performs a predetermined process on the integrated value (step S24). For example, a predetermined function set in advance in the EEPROM 100d is applied in accordance with an input from a switch (not shown) or multiplied by a coefficient considering the variation rate. Next, the CPU 100a stores the processed value in the correction variable X (step S25).

  The CPU 100a starts to elapse with a built-in timer and waits for a predetermined time, for example, 1 [s] (step S26: NO). When the predetermined time has elapsed (step S26: YES), the CPU 100a takes in a signal from the cutting switch 80 and determines whether or not the cutting switch 80 is off (step S27). When the cutting switch 80 is on (step S27: NO), the CPU 100a resets the timer (step S28) and returns the process to step S22. When the cutting switch 80 is off (step S27: YES), the CPU 100a ends the process.

  In the above-described embodiment, the periods 0 to P / 4 and 3P / 4 to P in which the grain should not contact the grain amount detection sensor 52 and the periods P / 4 to 3P / 4 in which the grain should contact Is merely an example, and the present invention is not limited thereto. The contact period and the non-contact period are determined according to the specifications of each combine.

  In the combine according to the embodiment, since the grains are thrown in different upward directions by the first throwing blade 11a and the second throwing blade 12a, uneven distribution of the grains in the grain tank 5 is prevented. In addition, the storage rate can be improved. Further, the grain amount can be detected by applying the grain to the grain amount detection sensor 52. Moreover, since the grain quantity detection sensor 52 is provided in the ceiling of the grain tank 5, the grain quantity detection sensor 52 is not buried.

  Moreover, the grain thrown by the 2nd throwing blade | wing 12a can be diffused by the guide plate 14 in the grain tank 5 to the upper front or the upper side. Moreover, in the grain tank 5, it can be made to spread | diffuse, for example to right and left by hitting the grain thrown by the 2nd throwing blade 12a to the protrusion 51. FIG.

  In addition, the grain amount detection sensor is provided in the front part of the ceiling of the grain tank 5, the pickup sensor which detects passage of the 2nd throwing blade 12a is provided in the casing 15, and the grain thrown by the 2nd throwing blade 12a is provided. You may comprise so that it may collide with a grain amount detection sensor. In this case, the grain amount stored in the grain tank 5 is calculated based on the grain amount thrown by the second throwing blade 12a.

(Example of change)
FIG. 11 is a partially enlarged perspective view schematically showing the inside of the storage tank 5 in the combine in which the configuration of the protrusion 51 is partially changed. As shown in FIG. 11, the protrusion 51 is disposed on the rear side of the grain amount detection sensor 52. The left and right dimensions of the protrusion 51 are designed so that the rear left and right dimensions are gradually larger than the front left and right dimensions. In addition, the vertical dimension of the protrusion 51 is designed so that the vertical dimension on the rear side becomes gradually larger than the vertical dimension on the front side. The lower end portion of the protrusion 51 is inclined downward toward the rear.

  Since the left and right dimensions and the vertical dimension of the protrusion 51 are designed such that the rear dimension is gradually larger than the front dimension, the grains easily diffuse in the grain tank 5.

  Although the description of the screw conveyor 10 is omitted in FIG. 11, the screw conveyor 10 is located in front of the grain amount detection sensor 52. The grain amount detection sensor 52 is positioned in front of the protrusion 51 and is positioned between the protrusion 51 and the screw conveyor 10. Therefore, the grain thrown from the screw conveyor 10 directly collides with the grain amount detection sensor 52.

  If the grain amount detection sensor 52 is positioned on the rear side of the protrusion 51, the grain thrown from the screw conveyor 10 collides indirectly with the grain amount detection sensor 52 after colliding with the protrusion 51. Since the grain directly collides with the grain quantity detection sensor 52, the grain quantity can be accurately detected as compared with the case where the grain collides indirectly.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The technical features described in each embodiment can be combined with each other, and the scope of the present invention is intended to include all modifications within the scope of claims and the scope equivalent to the scope of claims. Is done.

2 Threshing device 5 Grain tank (reservoir)
7 Grain conveyor 10 Screw conveyor 11 First screw 11a First throwing blade 12 Second screw 12a Second throwing blade 14 Guide plate (guide section)
16 Pickup sensor (passage detector)
51 protrusion 52 grain amount detection sensor (grain amount detection unit)
100 Control unit (correction unit)

Claims (4)

A threshing device for threshing the harvested cereals, a storage unit for storing the grains threshed by the threshing device, a cereal conveyor for conveying the grains threshed by the threshing device to the upper side, and In a combine provided with a screw conveyor that is disposed along a horizontal direction in a storage unit and that throws the grains conveyed by the cereal conveyor into the storage unit,
The screw conveyor is
A first throwing blade parallel to the axis of the screw conveyor;
And a second throwing blade extending in a direction intersecting the axis of the screw conveyor. A grain amount detection unit that is provided on the ceiling of the storage unit in the storage unit, and that detects the amount of grain introduced by the first throwing blade or the second throwing blade,
A passage detection unit for detecting passage of the first throwing blade or the second throwing blade;
The detection result detected by the kernel amount detection unit during the contact period of the kernel to the kernel amount detection unit determined based on the detection result of the passage detection unit is detected outside the period. The combine according to claim 1, further comprising: a correction unit configured to correct based on a detection result detected by the unit.   The combine according to claim 1 or 2, further comprising a guide unit that guides the grain thrown in by the second throwing blade. The combine according to any one of claims 1 to 3, wherein a projection having an inverted triangular cross section is provided on the ceiling of the storage section in the storage section.

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