Harvester and harvesting device

Abstract

The harvester of the present application is provided with a threshing device having a threshing section and a separating section that performs a separating process on a threshed product from the threshing section. The threshing section is provided with a threshing chamber, a threshing cylinder, and a receiving screen. The separating section is provided with a swing separating device that performs a separating process on the threshed product. The swing separating device is provided with a sieve box (41) and an upper sieve (45) having a plurality of sieve plates (45a) that are supported so as to be swingable freely about a swing axis core in a lateral posture, the plurality of sieve plates (45a) being spaced apart along a conveying direction of the threshed product. Among the plurality of sieve plates (45a), a limiting lip (Lx) that has an increased amount of protrusion upward compared to the other sieve plates (45a) is included in a rear portion of the upper sieve (45).

Description

Technical Field

[0001] This invention relates to harvesters and harvesting devices. Background Technology

[0002] [1] The present invention relates to a harvester that obtains grains by threshing the harvested crop.

[0003] The harvester described in Patent Document 1 (a combine harvester in this document) has the following structure: the harvested stalks are fed into the threshing chamber, threshing is performed using the threshing drum, and the grains are recovered by the oscillation of the oscillating sorting device (an oscillating sorting mechanism in this document) of the sorting section and the sorting air supplied from the air separator to sort the processed material that has fallen through the receiving net.

[0004] In Patent Document 1, the oscillating sorting device includes an upper screen with multiple screen plates arranged at predetermined intervals in the front-to-back direction. Each screen plate is supported so that it can oscillate freely around a support shaft in a lateral orientation. Thus, by setting the angles of the multiple screen plates, the opening degree (a value determined by the intervals of the screen plates) that allows the processed material containing grains to pass through can be appropriately set, thereby enabling control of the sorting performance.

[0005] [2] The present invention relates to a harvesting device for a harvester used in harvesting operations in a field.

[0006] As a harvesting device as described above, for example, there is a harvesting device described in Patent Document 2.

[0007] The harvesting device (referred to as "harvesting section" in Patent Document 2) includes a harvesting frame (referred to as "harvesting frame" in Patent Document 2) and a harvesting blade (referred to as "cutting device" in Patent Document 2) supported on the harvesting frame.

[0008] Furthermore, the harvesting frame receives the harvested rice stalks cut by the harvesting blade.

[0009] [3] The present invention relates to a harvester that obtains grains by threshing the harvested crop.

[0010] The harvester described in Patent Document 3 (a combine harvester in this document) has the following structure: during rice harvesting, a threshing device is used to thresh the harvested material, and the grains are sorted and recycled. Furthermore, the threshing operation of the harvesting process in Patent Document 3 has the following structure: a sorting section (a oscillating sorting body in this document) is used to screen the material that falls through the receiving net due to the rotation of the threshing cylinder, and sorting is performed using sorting air from an air separator (an air separator fan in this document).

[0011] Furthermore, Patent Document 3 has the following structure: a sound sensor is installed on the cover of the rear wall of the sorting chamber, which can detect scattered grains based on the collision sound of scattered grains contained in the dust.

[0012] In addition, Patent Document 4 describes a structure that includes an air separator that uses a sorting section of a threshing device (in this document, a swing sorting mechanism) to thresh and supplies sorting air to the sorting section, and a dust exhaust fan that discharges the floating dust generated in the sorting section during threshing.

[0013] In this patent document 4, a sensor is installed on the inner surface of the extension end of the dust exhaust fan that conveys dust downwards. When grains and straw are discharged together from the oscillating sorting mechanism, the straw is blown downwards by the airflow from the dust exhaust fan. However, the grains have a relatively high specific gravity and the attenuation caused by air resistance is low, which strongly impacts the sensing surface of the sensor. Therefore, grain detection is possible.

[0014] [4] This invention relates to a harvester for threshing harvested crops.

[0015] In the harvester described in Patent Document 5 (which is a combine harvester in this document), the processing method is set as follows: the harvested stalks are threshed using a threshing drum, and the processed material that leaks from the receiving net is sorted using a swing sorting unit.

[0016] Patent document 5 includes a first loss sensor for detecting the amount of grains leaking from the end of the receiving mesh and a second loss sensor for detecting the amount of grains falling from the rear of the oscillating sorting device. Additionally, an angle-adjustable dust valve is provided on the upper wall of the threshing chamber to adjust the amount of straw being conveyed.

[0017] Based on this structure, when the amount of grains detected by the first loss sensor exceeds the threshold and increases, the speed of conveying the straw in the threshing chamber is reduced by controlling the angle of the dust conveying valve, thereby reducing grain loss.

[0018] Existing technical documents

[0019] Patent documents

[0020] Patent Document 1: Japanese Patent Application Publication No. 2011-177076

[0021] Patent Document 2: Japanese Patent Application Publication No. 2019-180319

[0022] Patent Document 3: Japanese Patent Application Publication No. 2005-102610

[0023] Patent Document 4: Japanese Patent Application Publication No. 61-96916

[0024] Patent Document 5: Japanese Patent Application Publication No. 2012-244942 Summary of the Invention

[0025] The problem that the invention aims to solve

[0026] [1] The subject matter corresponding to the background technology [1] is as follows.

[0027] If we consider the situation where a harvester is used to thresh the harvested material, then with the increase in the amount of harvested material and the increase in the amount of processed material supplied from the threshing chamber to the oscillating sorting device, we can imagine that the grains will be discharged from the rear end of the oscillating sorting device in a state mixed with the straw fragments generated during the sorting process, or that the grains will be discharged from the rear end of the oscillating sorting device together with the straw fragments due to the air pressure of the sorting air.

[0028] To suppress such undesirable conditions, in Patent Document 1, the dust removal adjustment plate is bolted to the rear end of the oscillating sorting device so that its vertical position can be freely adjusted (paragraph number

[0060] ). However, manually adjusting the vertical position of the dust removal adjustment plate by operating the bolt is time-consuming and laborious, and there is room for improvement.

[0029] For this reason, there is a need for harvesters that can suppress the wasteful discharge of grains when using a oscillating sorting device to sort grains.

[0030] [2] The subject matter corresponding to the background technology [2] is as follows.

[0031] In the harvesting device described in Patent Document 2, when the upper part of the harvested rice stalk in an upright position near the left and right side walls of the harvesting frame tilts outward in the harvesting width direction, the upper part of the harvested rice stalk extends beyond the side walls of the harvesting frame and becomes a state in which it extends outward from the harvesting frame in the harvesting width direction.

[0032] Moreover, the harvested rice stalks are prone to spilling from the harvesting frame, resulting in harvest losses.

[0033] The purpose of this invention is to provide a harvesting device that minimizes harvest losses.

[0034] [3] The subject matter corresponding to the background technology [3] is as follows.

[0035] As shown in patent documents 3 and 4, from the viewpoint of reducing grain loss, it is important to properly detect the discharge of waste grains during threshing.

[0036] Here, if we consider the phenomenon of grain discharge, as described in Patent Documents 3 and 4, in addition to the phenomenon of grains being discharged by the sorting air in a state mixed with straw debris generated during sorting in the sorting section, it is also conceivable that the grains that leak from the receiving net are discharged in a state of contact with straw debris flowing in by the sorting air before reaching the sorting section.

[0037] Based on the descriptions and drawings in Patent Documents 3 and 4, it is determined that in an automatic threshing type combine harvester (harvester), the processed material after being threshed in the threshing chamber is discharged from the dust outlet at the end position in the material conveying direction, and then discharged to the outside by a dust exhaust fan.

[0038] Because of this structure, in either of the structures in Patent Documents 3 and 4, the use of sensors to detect the spatially dispersed grains floating in the straw fragments of straw chips easily leads to a decrease in detection accuracy.

[0039] For this reason, when grains are discharged from the sorting section that sorts the threshed material, a harvester that can accurately detect the discharged grains is required.

[0040] [4] The subject matter corresponding to the background technology [4] is as follows.

[0041] As described in Patent Document 5, in a harvester having a threshing chamber that houses the threshing cylinder, the harvested material is threshed in the threshing chamber, and the processed material in the threshing chamber is allowed to fall through the receiving net and be sorted by a swing sorting device. The threshed straw is configured to be discharged from the end of the transport direction of the harvested material to the outside of the threshing chamber.

[0042] However, with an increased amount of harvested material supplied to the threshing chamber, the threshing process becomes inadequate, and grains are discharged from the threshing chamber along with the straw, resulting in grain loss. To suppress such grain loss, it is possible to control the angle of the dust supply valve based on the detection result of the first loss sensor, as described in Patent Document 5. However, as described in Patent Document 5, if only a single first loss sensor is available, it cannot be said that the detection accuracy of grains leaking from the receiving net is sufficient.

[0043] For this reason, harvesters capable of detecting grains leaking from the receiving net are required.

[0044] Solution for solving the problem

[0045] [1] The solution to the problem [1] is as follows.

[0046] The harvesting apparatus of the present invention is characterized by comprising a threshing device, the threshing device having: a threshing section for threshing crops; and a sorting section disposed below the threshing section for sorting the threshed material that has leaked from the threshing section into grains and foreign matter, wherein the threshing section comprises: a threshing chamber; a threshing cylinder housed in the threshing chamber and driven to rotate about a rotating shaft to thresh crops; and a receiving net disposed on the threshing section. Below the cylinder, in the sorting section, there is a swing sorting device. The swing sorting device sorts the threshed material that leaks from the receiving net by swinging. The swing sorting device includes: a screen box, which is frame-shaped when viewed from above; and an upper screen, which has a plurality of screen plates. The plurality of screen plates are spaced apart along the conveying direction of the threshed material and are supported to swing freely around a swinging shaft in a transverse orientation. Among the plurality of screen plates, the upper screen includes a limiting lip with an increased upward protrusion compared to the other screen plates at its rear.

[0047] Based on this structural feature, for example, when the amount of threshed material supplied to the oscillating sorting device increases, by setting the oscillation posture of multiple screen plates and setting the limiting lip to an upright posture, the migration of the threshed material is suppressed, and the grains contained in the threshed material are facilitated to pass through the upper screen, thus preventing the grains from being wastefully discharged from the rear end of the oscillating sorting device. In particular, in the structure with multiple limiting lips, the migration of the threshed material can be suppressed even better.

[0048] Therefore, a harvester is designed to suppress the wasteful discharge of grains when using a oscillating sorting device to sort the grains.

[0049] As a structure based on the above, the harvester may also include a throughput sensor that detects the amount of material supplied to the oscillating sorting device; a screen angle control unit that can expand the opening area between the plurality of screen plates by oscillating each of the plurality of screen plates, including the limiting lip, toward an upright position; and a control device that controls the screen angle control unit so that the more the throughput of the material detected by the throughput sensor increases, the more the plurality of screen plates, including the limiting lip, oscillate toward the upright position.

[0050] Therefore, as the amount of threshed material detected by the throughput sensor increases, the control device causes the screen plate to swing more towards an upright position. This increases the amount of threshed material passing through the upper screen while limiting the movement of threshed material that is stuck on the upper screen, thus preventing the grains from being discharged from the rear end of the screen box.

[0051] Alternatively, based on the above structure, the limiting lip may be formed such that, in its most upright state, the swing end is positioned higher than the rear end edge in the conveying direction within the screen box.

[0052] Therefore, when the limiting lip is at its maximum upright position, it is higher than the rear end of the sieve box. Thus, for example, in a structure without a limiting lip, even when the threshed material is discharged from the rear end of the sieve box, the flow of the threshed material can be suppressed, and the discharge of grains contained in the threshed material can be suppressed.

[0053] Alternatively, based on the above structure, the restricting lip, in its maximum collapsed state, may have its swing end protrude rearward beyond the rear end edge in the conveying direction within the screen box.

[0054] Therefore, under the condition of limiting the maximum lodging of the lip, the swing end protrudes backward from the rear end edge of the screen box, thereby limiting the swing end of the lip to also be able to receive the threshed material and guide it towards the screen box, reducing the loss of the threshed material. As a result, the loss of grains is reduced.

[0055] Alternatively, based on the above structure, the limiting lip may be located at the rearmost end in the transfer direction.

[0056] Therefore, by having only a single limiting lip, it is possible to suppress the undesirable situation of grains being discharged from the rear end of the sieve box.

[0057] [2] The solution to the problem [2] is as follows.

[0058] The present invention is characterized in that the harvesting device is provided on a harvester performing harvesting operations in a field, wherein the harvesting device has: a harvesting frame that receives harvested rice stalks; and a harvesting blade supported on the harvesting frame and extending along the harvesting width direction, the harvesting frame having: left and right side walls; and a rear wall located at the rear end of the harvesting frame and extending across the left and right side walls, a guide portion is installed on at least one of the left and right side walls, the guide portion guiding the harvested rice stalks harvested by the harvesting blade, the guide portion being located further rearward than the harvesting blade, and extending in a state where the further rearward it is, the closer it is to the center side in the harvesting width direction.

[0059] According to the present invention, the harvested rice stalks are guided towards the center of the harvest width direction by the guide portion. This easily prevents the harvested rice stalks from extending outwards from the harvest frame in the harvest width direction. Furthermore, the guide portion helps to guide the harvested rice stalks that are extending outwards from the harvest frame in the harvest width direction, thus making it easier for them to be contained within the harvest frame.

[0060] As a result, it is difficult to generate any losses.

[0061] That is, according to the present invention, a harvesting device that minimizes harvest losses can be realized.

[0062] Furthermore, in this invention, it is preferred that the harvesting device includes: a reel that rotates while gathering upright rice stalks; and a reel cylinder that raises and lowers the reel, with the front end of the guide portion located at a position further forward than the reel cylinder.

[0063] When the front end of the guide is positioned further back than the reel cylinder, harvested rice stalks extending outward from the harvesting frame in the harvesting width direction are prone to getting stuck on the reel cylinder. Furthermore, the harvested rice stalks stuck on the reel cylinder are not guided by the guide and easily spill out of the harvesting frame.

[0064] Here, according to the above structure, the front end of the guide is located forward of the reel cylinder. Therefore, the harvested rice stalks received by the harvesting frame are guided by the guide before reaching the reel cylinder in the forward-backward direction. This makes it difficult for the harvested rice stalks to come into contact with the reel cylinder. Thus, a harvesting device can be realized that easily avoids the situation where the harvested rice stalks get stuck on the reel cylinder.

[0065] Furthermore, in this invention, it is preferable that the guide portion is positioned to overlap with the upper part of the sidewall when viewed from the side.

[0066] According to this structure, the guide is positioned at a relatively high level. Therefore, the guide easily acts on the upper part of the harvested stalk. Consequently, compared to the case where the guide acts on the lower part of the harvested stalk, it is easier and more effective to guide the harvesting of the stalk.

[0067] Furthermore, in this invention, it is preferred that the guide portion is arranged to span the side wall and the rear wall.

[0068] According to this structure, compared to a guide section that is too short to reach the rear wall, the rear end of the guide section is more easily positioned closer to the center in the harvest width direction. Therefore, the harvested stalks are reliably guided towards the center in the harvest width direction by the guide section. This more reliably prevents the harvested stalks from extending outwards from the harvest frame in the harvest width direction. Furthermore, the guide section helps to more reliably house the harvested stalks that are extending outwards from the harvest frame in the harvest width direction, making it easier for them to be reliably contained within the harvest frame.

[0069] Furthermore, in this invention, it is preferred that the guide portion is rod-shaped.

[0070] In the case where the guide section is plate-shaped, imagine a situation where the harvested rice stalks are damaged due to the edge of the guide section acting on them.

[0071] Here, according to the above structure, the guide part is rod-shaped. Therefore, compared to the case where the guide part is plate-shaped, it is easier to avoid damage to the harvested rice stalks due to the action of the guide part.

[0072] [3] The solution to the problem [3] is as follows.

[0073] The harvester of the present invention is characterized by comprising: a threshing device having a threshing section and a sorting section, the threshing section threshing crops, and the sorting section disposed below the threshing section to sort the threshed material that has leaked from the threshing section into grains and foreign matter; a straw processing device connected to the rear of the threshing device to process the straw after threshing by the threshing section, wherein the threshing section includes: a threshing chamber; a threshing cylinder housed in the threshing chamber and driven to rotate around a rotating shaft to thresh crops; a receiving net disposed below the threshing cylinder; and a dust discharge port formed in the threshing chamber. At the end of the crop conveying direction in the threshing chamber, straw from between the rear end of the threshing cylinder and the rear end of the receiving net is discharged from the threshing chamber. The sorting section is equipped with a swing sorting device, which sorts the threshed material that leaks from the receiving net by swinging. The harvester is equipped with a flow guide section, which is set in a front-high-back-low configuration across the dust discharge port and the straw processing device, guiding the straw discharged from the dust discharge port toward the straw processing device. A grain detection sensor is set in the area of ​​the flow guide section on the side opposite to the straw processing device to detect the grains discharged from between the rear end of the receiving net and the rear end of the swing sorting device.

[0074] According to this structural feature, straw and other particles in the threshing chamber that do not pass through the receiving net are discharged from the dust outlet, flow down the flow guide, and are processed by the straw processing section. Additionally, grains in the threshing material that have bounced up in the oscillating sorting device are discharged out of the machine through the space between the rear end of the receiving net and the rear end of the oscillating sorting device. These discharged grains are detected by colliding with a grain detection sensor located on the side of the flow guide opposite to the straw processing device. In this structure, since the grain detection sensor can be supported in the flow guide, a bracket is not required. Furthermore, because the straw and dust discharged from the dust outlet are conveyed out of the machine along the flow guide, dust from the dust outlet does not intrude into the grain dispersion space. For example, it prevents the grains scattering from the rear end of the oscillating sorting device from contacting dust, thus reducing their dispersion speed and improving detection accuracy.

[0075] Therefore, a harvester is configured to accurately detect the discharged grains when the grains are discharged from the sorting section that sorts the threshed material.

[0076] As a structure based on the above structure, the grain detection sensor may also be positioned near the outer end of the flow guide in the transverse width direction when viewed along the direction of the rotating shaft.

[0077] The receiving mesh is formed in an arc shape centered on the rotating shaft. When viewed from above, the area further outward from the central region of the receiving mesh (the area overlapping with the shaft) the dripping surface is inclined relative to the imaginary horizontal plane. Therefore, the distribution of threshed material dripping from the receiving mesh onto the oscillating sorting device increases as it moves away from the central region of the receiving mesh. Similarly, the distribution of grains dripping from the receiving mesh onto the oscillating sorting device increases near the outer end of the oscillating sorting device's transverse direction compared to the center. The amount of grains discharged from the rear end of the oscillating sorting section also increases near the outer end in the transverse direction compared to the central section. For this reason, when viewed along the direction of the rotating shaft, by placing the grain detection sensor near the outer end in the transverse direction of the flow guide, grains scattered from the rear end of the oscillating sorting device can be detected effectively.

[0078] As a structure based on the above structure, it is also possible that the surface of the flow guide section opposite to the straw processing device is provided with a cover, and the grain detection sensor is disposed between the flow guide section and the cover with the detection surface exposed from the cover.

[0079] Therefore, by arranging the grain detection sensor in the space between the flow guide and the cover, the grain detection sensor and wiring can be protected. Furthermore, for example, by arranging the grain detection sensor so that the detection surface is exposed from the opening formed in the cover, grain detection can be performed effectively.

[0080] Alternatively, based on the above structure, the grain detection sensor may be a pressure-sensitive sensor that detects the pressure when the grains collide.

[0081] Therefore, by setting a threshold between the detection value when an object with a smaller specific gravity than a grain, such as straw dust, comes into contact with the grain and the detection value when a grain comes into contact with it, the detection accuracy of the grain detection sensor can be improved.

[0082] As a structure based on the above structure, the harvester may also include a grain loss determination unit, which determines the amount of grain discharged outside the machine as grain loss based on the detection result of the grain detection sensor.

[0083] Therefore, grain loss can be determined based on the detection results of the grain detection sensor. Thus, if the grain loss exceeds the threshold, the operator can be prompted to take action by automatically controlling the grain loss and illuminating the execution indicator light.

[0084] [4] The solution to the problem [4] is as follows.

[0085] The harvester of the present invention is characterized by having a threshing device comprising: a threshing section for threshing crops; and a sorting section disposed below the threshing section for sorting the threshed material that has leaked from the threshing section into grains and foreign matter. The threshing section includes: a threshing chamber; a threshing cylinder housed within the threshing chamber and driven to rotate around a rotating shaft to thresh the crops; and a receiving net disposed on the threshing cylinder. Below; and a dust discharge port, which is formed at the end of the crop conveying direction in the threshing chamber, to discharge straw from the rear end of the threshing cylinder and the rear end of the receiving net from the threshing chamber. In the area below the receiving net and above the sorting section, downstream of the crop conveying direction in the threshing chamber, the left and right spaces between the two sides of the receiving net in the circumferential direction and the inner sides of the left and right side walls of the threshing chamber are respectively equipped with leakage sensors to detect the grains that leak from the receiving net.

[0086] Based on this structural feature, for example, when the amount of harvested material supplied to the threshing chamber increases, the amount of grains leaking from the receiving net downstream of the harvested material's transport direction in the threshing chamber also increases, and this leakage can be detected using the left and right leakage sensors. In this structure, the left and right leakage sensors are respectively positioned in the left and right spaces between the two sides of the receiving net in the circumferential direction and the inner sides of the left and right side walls, downstream of the harvested material's transport direction in the threshing chamber. Therefore, even if grains leak from the receiving net due to the pressure accompanying the rotation of the threshing cylinder, high-speed flying grains can be detected with high precision by using the detection surface of the leakage sensor to catch them. Furthermore, since leakage sensors are arranged on both sides, even if there is a deviation in the amount of grains leaking from the receiving net with the rotation of the threshing cylinder, the leakage amount can be accurately detected.

[0087] Therefore, a harvester capable of detecting grains leaking from the receiving net with high precision is constructed.

[0088] Alternatively, based on the above structure, the leakage sensor may be positioned at an angle on the inner side of the left and right sidewalls, with the lower side being closer to the center in the left-right direction.

[0089] Therefore, by incorporating a pressure-sensitive leakage sensor on the inner side of the left and right side walls in an inclined posture that is closer to the center towards the bottom, it is possible to allow grains to be incident on the detection surface of the leakage sensor at a near-vertical angle, enabling the detection of grains with high sensitivity.

[0090] As a structure based on the above structure, it is also possible that a partition wall is provided in a position on the upper side of the sorting section and below the receiving net, in the transfer direction upstream of the leakage sensor, in an orientation that intersects with the rotating shaft.

[0091] Therefore, in the direction of harvest transfer in the threshing chamber, a partition wall is arranged on the outside of the receiving net at a position upstream of the leakage sensor. Thus, the grains leaking from the receiving net upstream of the leakage sensor will not come into contact with the leakage sensor, which can suppress false detection of grains.

[0092] Alternatively, based on the above structure, the leakage sensor may be a pressure-sensitive sensor that detects the pressure when the grains collide.

[0093] Therefore, in the event of a collision between a grain and the detection surface of the flow rate sensor, pressure can be detected at the time of the collision, and electrical processing can be performed.

[0094] As a structure based on the above structure, the harvester may also include a grain loss estimation unit, which estimates the amount of grain discharged from the dust outlet as grain loss based on the detection result of the leakage amount sensor.

[0095] Therefore, it is possible to estimate grain loss based on the detection results of the leakage sensor during threshing. Thus, for example, if grain loss exceeds a threshold, the operator can be prompted to take action by implementing automatic control to suppress grain loss and illuminating an indicator light. Attached Figure Description

[0096] Figure 1 This is a diagram illustrating the first embodiment (hereinafter, until...). Figure 14 (They are all the same), is a side view of a full-feed combine harvester.

[0097] Figure 2 This is a top view of a full-feed combine harvester.

[0098] Figure 3 This is a longitudinal sectional side view of the threshing device.

[0099] Figure 4 yes Figure 3 Sectional view along line IV-IV.

[0100] Figure 5 yes Figure 3 VV-line sectional view.

[0101] Figure 6 This is a longitudinal sectional side view of a threshing device showing the configuration of sensor-type components.

[0102] Figure 7 It is a cross-sectional top view showing the positional relationship between the conveying device and the reduction device.

[0103] Figure 8 yes Figure 7 Sectional view along line VIII-VIII.

[0104] Figure 9 yes Figure 7 A sectional view along line IX-IX.

[0105] Figure 10 This is a side view showing the first and second upper sieves.

[0106] Figure 11 This is a cross-sectional view showing the oscillating structure of the sieve plate.

[0107] Figure 12 It is a cross-sectional view showing the restrictive lip in an upright position.

[0108] Figure 13This is a cross-sectional view showing the restricted lip in a prone position.

[0109] Figure 14 It is a block diagram of the control structure.

[0110] Figure 15 This is a diagram illustrating the second embodiment (hereinafter, until...). Figure 20 (They are all the same), is the left view of a combine harvester.

[0111] Figure 16 This is a top view showing the structure of the harvesting device.

[0112] Figure 17 This is a front view showing the structure of the harvesting device.

[0113] Figure 18 It is a three-dimensional diagram showing the structure of the harvesting device.

[0114] Figure 19 This is a top view showing the structure of the transverse conveyor component.

[0115] Figure 20 yes Figure 19 XX-XX section view. Detailed Implementation

[0116] [1] First Embodiment

[0117] The first embodiment of the present invention will now be described with reference to the accompanying drawings.

[0118] [The overall structure of a combine harvester]

[0119] Figure 1 , Figure 2 This shows the side and plane of a full-feed combine harvester A, which is an example of a harvester.

[0120] In these diagrams, the direction of arrow F is defined as "forward" in the front-rear direction of the vehicle body 1, the direction of arrow B is defined as "backward" in the front-rear direction of the vehicle body 1, the direction of arrow L is defined as "left" in the left-right direction of the vehicle body 1, and the direction of arrow R is defined as "right" in the left-right direction of the vehicle body 1. Additionally, the direction of arrow U is defined as "up" in the up-down direction of the vehicle body 1, and the direction of arrow D is defined as "down" in the up-down direction of the vehicle body 1.

[0121] The full-feed combine harvester A (hereinafter referred to as combine harvester A) is configured to move freely by means of a tracked travel device 2 provided in the travel body 1, and the travel body 1 is provided with a threshing device T.

[0122] The combine harvester A has a harvesting section 4 at the front of the traveling body 1 for harvesting crops (rice, wheat, soybeans, rapeseed, etc.) in the field, and a feeding device 11 for supplying the crops (hereinafter referred to as harvested material) harvested by the harvesting section 4 to the threshing device T.

[0123] The combine harvester A has a grain bin 12 located alongside the threshing unit T for storing the grains separated by the threshing unit T. Additionally, the grain bin 12 has a grain discharge device 13 for discharging the stored grains.

[0124] like Figure 1 , Figure 2 As shown, the harvesting section 4 includes: a reel 5 for gathering crops; a shear-type cutting device 6 for cutting crops in the field; and an auger 7 for supplying the harvested crops (harvest) to the feeding device 11 by conveying them laterally to the central side.

[0125] The combine harvester A has a driver's section 9 located to the right rear of the harvesting section 4, parallel to the feeding device 11. The driver's section 9 is covered by the cab 10. Although not shown, the engine, cooling fan, radiator, etc., are housed below the driver's section 9. The driving force of the engine is transmitted to the traveling device 2, the harvesting section 4, the threshing device T, etc.

[0126] Because the combine harvester A is configured in this way, during harvesting operations, the harvesting height at the harvesting section 4 is set to a height sufficient for harvesting the target crop, and the traveling body 1 is moved forward. The crop to be harvested is pulled closer to the rear by the reel 5, and its roots are cut by the cutting device 6. The harvested material is then collected by the auger 7 and fed to the front of the feeding device 11, which then supplies it to the threshing device T. Furthermore, in the threshing device T, the supplied harvested material is processed to recover the grains, which are then stored in the grain bin 12.

[0127] [Threshing device]

[0128] like Figures 3-6 As shown, the threshing device T has a threshing section 20 at the top for threshing the harvest supplied by the feeding device 11, a sorting section 30 at the bottom for sorting the threshed material supplied by the threshing section 20 into grains and foreign matter, and a straw processing device 50 at the rear of the sorting section 30 for breaking up the straw discharged from the dust outlet 25 of the threshing section 20.

[0129] [Threshing device: threshing section]

[0130] The threshing section 20 has a threshing chamber 21 from which the harvest is supplied by the feeding device 11, and a threshing cylinder 22 is rotatably housed inside the threshing chamber 21, driven by a rotating shaft X in a back-and-forth orientation. On the underside of the threshing cylinder 22, when viewed along the direction of the rotating shaft X, as shown... Figure 4 , Figure 5 As shown, the overall configuration includes an arc-shaped receiving mesh 23 centered on the rotating shaft core X. Additionally, as... Figure 4 As shown, the threshing cylinder 22 is driven to rotate clockwise in the main view.

[0131] The threshing chamber 21 has left and right side walls 221a, front and rear end walls 21b, and an upper wall 21c. Multiple dust valves 24 are provided on the lower (inner) surface of the upper wall 21c. The threshing cylinder 22 has a threshing cylinder shaft 22a extending in the front-rear direction. The end of the threshing cylinder shaft 22a is rotatably supported on the front and rear end walls 21b in a front-rear orientation by a rotating shaft X. Furthermore, a dust discharge port 25 is formed at the terminal portion of the threshing chamber 21 relative to the direction of harvest movement, in the area from the rear end of the receiving net 23 to the rear end wall 21b.

[0132] like Figure 4 , Figure 5 As shown, multiple dust valves 24 are oscillatingly supported on the upper wall 21c via a longitudinally oriented shaft 24a. The multiple dust valves 24 are arranged in an inclined position relative to the rotating shaft X when viewed from above, so as to the end side (in the direction of transport) of the harvested material that rotates with the threshing cylinder 22 inside the threshing chamber 21 as the threshing cylinder 22 rotates. Figure 3 (The middle part is on the right) is transferred. Thus, the harvest supplied to the threshing chamber 21 is transferred by multiple dust valves 24 and discharged from the dust outlet 25.

[0133] Furthermore, the dust-feeding valve 24 can change the distance the harvest is transported per unit time by altering its swing posture centered on the shaft 24a. The specific structure is not shown in the accompanying drawings, but multiple dust-feeding valves 24 are connected by a linkage mechanism in a manner that allows them to swing simultaneously at equal angles. The threshing device T includes a dust-feeding valve control unit 71 that uses the driving force of an electric motor to change the swing posture of the multiple dust-feeding valves 24 centered on the shaft 24a.

[0134] like Figure 3 As shown, the threshing cylinder 22 has a structure in which multiple rod-shaped threshing cylinder frames, which rotate integrally with the threshing cylinder shaft 22a, are provided with multiple threshing teeth 22b in an outwardly protruding form. When viewed along the direction of the rotating shaft X, the receiving mesh 23 forms multiple openings for discharging by arranging multiple arc-shaped longitudinal frames and multiple cross frames that are parallel to the rotating shaft X relative to the longitudinal frames in a grid pattern.

[0135] Thus, the threshing section 20 uses the driven rotating threshing cylinder 22 to thresh the harvest supplied from the feeding device 11 to the threshing chamber 21, causing the threshed material, containing the grains separated from the straw by the threshing process, to fall into the receiving net 23. Furthermore, in the threshing chamber 21, as described above, the harvest rotates within the threshing chamber 21 along with the rotation of the threshing cylinder 22. The harvest is moved rearward by contacting multiple dust discharge valves 24, and the harvest, having completed the threshing process, is discharged as straw from the dust discharge port 25.

[0136] [Threshing device: Sorting section]

[0137] like Figure 3 As shown, the sorting unit 30 includes: a swing sorting device 31 disposed below the receiving net 23; a swing drive mechanism 32 for swinging the swing sorting device 31 in the front-to-back direction; and an air classifier 33 for supplying sorting air to the swing sorting device 31 from front to rear.

[0138] Furthermore, the oscillating drive mechanism 32 drives the entire oscillating sorting device 31 along a long circular trajectory in the front-rear direction by means of the action force from the eccentric shaft that rotates using the driving force of the engine, which simultaneously causes the entire oscillating sorting device 31 to move backward and upward, and simultaneously causes the entire oscillating sorting device 31 to move forward and downward.

[0139] like Figure 3 , Figure 7 As shown, the sorting unit 30 includes below the oscillating sorting device 31: a primary processing material recovery unit 34 for recovering sorted grains as primary processing material; and a secondary processing material recovery unit 35 for recovering grains containing foreign matter such as straw fragments and not sufficiently single-grained after being sorted by the oscillating sorting device 31 as secondary processing material.

[0140] The primary processing material recovery unit 34 is equipped with a primary processing screw device 34S that conveys the primary processing material (grains) in the transverse direction, and a longitudinally oriented hoisting mechanism 36 is arranged between the threshing device T and the grain box 12 so as to supply the primary processing material conveyed by the primary processing screw device 34S to the grain box 12.

[0141] In addition, the secondary processing material recovery unit 35 is configured as a secondary processing spiral device 35S that conveys the secondary processing material in a transverse direction. The inclined reduction device 37 is arranged outside the threshing device T in such a way that the secondary processing material conveyed by the secondary processing spiral device 35S is conveyed from the intermediate conveying box 37a to the reduction spiral device 37S and returned to the front of the oscillating sorting device 31.

[0142] like Figures 7-9As shown, the conveying mechanism 36 has a drive sprocket 36b at the lower part and a driven sprocket (not shown) at the upper part inside the elongated conveying housing 36a, and a plurality of buckets 36e on the annular chain 36d wound around them. Additionally, although not shown in the figures, the conveying mechanism 36 has a mechanism for feeding grains conveyed to the upper end of the conveying housing 36a into the grain bin 12.

[0143] The drive sprocket 36b is connected to the shaft of the primary processing screw device 34S. An intermediate cylinder 38 is provided between the outer wall of the sorting section 30 and the conveying housing 36a to supply the grains conveyed by the primary processing screw device 34S to the lower part of the conveying housing 36a.

[0144] The intermediate cylinder 38 houses the end of the primary processing screw device 34S. To efficiently supply the grains conveyed from the intermediate cylinder 38 to the conveying housing 36a to the opening of the rising hopper 36e, such as... Figure 9 As shown, the bulging space 38T is formed by shaping a portion of the cross-section of the intermediate cylinder 38 into an outward bulging shape.

[0145] Furthermore, in this embodiment, the lower side of the inner circumference of the intermediate cylinder 38 is formed in a cylindrical shape along the outer circumference of the primary processing screw device 34S, and a portion of the upper side of the inner circumference of the intermediate cylinder 38 bulges outward to form a bulging space 38T. Thus, even grains that are not in contact with the primary processing screw device 34S within the bulging space 38T can be efficiently conveyed into the interior of the conveying shell 36a and supplied to the opening of the rising bucket 36e.

[0146] like Figure 3 , Figure 7 As shown, the reduction device 37 has a drive structure that transmits the driving force of the outer end of the secondary processing spiral device 35S to the intermediate conveyor box 37a and the reduction spiral device 37S, and performs the operation of returning the secondary processed material conveyed by the secondary processing spiral device 35S to the front of the oscillating sorting device 31 via the intermediate conveyor box 37a and the reduction spiral device 37S.

[0147] like Figure 3 As shown, the oscillating sorting device 31 has a frame-shaped screen box 41 that is open in the upward and downward direction. The vibrating plate 42, the first upper screen 43, the document pusher 44 and the second upper screen 45 are arranged in the area from the front to the rear. The lower screen 46 is arranged on the lower side of the first upper screen 43.

[0148] The oscillating sorting device 31 is a frame-shaped structure with the screen box 41 open in the upward and downward direction. When the air separator 33 supplies sorting air, the screen box 41 oscillates to sort the grains from the threshed material in the first upper screen 43 and the second upper screen 45. Then, the grains are allowed to fall through the mesh lower screen 46, thus achieving the so-called screening.

[0149] In this oscillating sorting device 31, a first upper screen 43 is disposed at a position connected to the rear end of the vibrating plate 42, and a paper remover 44 is disposed at the rear end of the first upper screen 43. Additionally, a second upper screen 45 is disposed in the area from below the paper remover 44 to near the rear end edge 41a of the screen box 41. The paper remover 44 is configured by arranging multiple teeth in an orientation parallel to the transverse direction of the screen box 41.

[0150] like Figure 10 As shown, the first upper screen 43 has a plurality of plate-shaped first screen plates 43a arranged at predetermined intervals in the front-back direction. These plurality of first screen plates 43a are oscillating freely on the screen box 41 about a lateral swing axis. Similarly, the second upper screen 45 has a plurality of plate-shaped second screen plates 45a arranged at predetermined intervals in the front-back direction. These plurality of second screen plates 45a are oscillating freely on the screen box 41 about a lateral swing axis.

[0151] The oscillating structures of the multiple first sieve plates 43a and the multiple second sieve plates 45a are common. That is, as shown... Figure 11 As shown, the first screen plate 43a and the second screen plate 45a are fixedly provided with U-shaped rod members 47 at both ends in the width direction, so that the upper and lower ends of the left and right rod members 47 are bent in the lateral outward direction, and the upper end is supported on the inner side of the side wall of the screen box 41 as the upper support shaft 47a.

[0152] The first sieve plate 43a and the second sieve plate 45a swing around the axis of the upper support shaft 47a on the left and right sides, and the axis of the upper support shaft 47a on the left and right sides becomes the swing axis.

[0153] Furthermore, the lower support shaft 47b at the lower end of the left and right rod components 47 is engaged with the actuating plate 48. The left and right actuating plates 48 are supported so that they can move freely in the front-back direction relative to the screen box 41. The left and right actuating plates 48 move in the front-back direction with the first upper screen 43, thereby simultaneously setting the swing posture of the multiple first screen plates 43a and the multiple second screen plates 45a of the second upper screen 45.

[0154] Although the specific structure is not shown, the threshing device T has... Figure 10 The screen angle control unit 72 shown is used to drive the first upper screen 43's actuating plate 48 and the second upper screen 45's actuating plate 48 to move simultaneously in the same direction using the driving force of the electric motor. Here, the swing posture is defined as the angle at which each screen plate is in the upright posture (the posture with the swing end facing upward) is the largest, and the angle at which the swing end faces backward is the smallest.

[0155] In particular, in the oscillating sorting device 31, such as Figure 10 , Figure 12 , Figure 13 As shown, one of the plurality of second screen plates 45a, positioned downstream in the conveying direction of the threshed material, is provided with a limiting lip Lx that protrudes upwards a greater amount than the other second screen plates 45a. The amount of protrusion relative to the other second screen plates 45a is denoted as the protrusion length La.

[0156] The second upper sieve 45 is configured to be in Figure 12 The standing posture shown Figure 13 The threshing process can swing freely between the shown lying positions. Moreover, the leakage of the threshing material is greatest when the limiting lip Lx is in the upright position. In addition, the leakage of the threshing material is minimal when the limiting lip Lx is in the lying position, and the upper end of the limiting lip Lx extends rearward by an extension amount Lb from the rear end edge 41a of the screen box 41.

[0157] like Figure 3 , Figure 6 As shown, the threshing device T includes a throughput sensor S3 that detects the throughput based on the thickness of the threshed material at the upper end of the first screen plate 43a stacked on the first upper screen 43. The throughput sensor S3 consists of a sensor plate 15 that is supported so as to swing freely with respect to the frame of the threshing device T and the lower end of which can be displaced rearward with reference to a support axis in a lateral orientation, and a potentiometer 16 that detects the swinging orientation of the sensor plate 15.

[0158] When the amount of threshed material supplied from the threshing section 20 to the sorting section 30 increases, the oscillation of the sensor plate 15 increases accordingly.

[0159] Therefore, the processing volume in the sorting unit 30 can be detected based on the swing amount of the sensor plate 15.

[0160] Because the sorting section 30 is configured in this way, when the sorting section 30 sorts the threshed material, the sorting air from the air classifier 33 flows from front to back above and below the screen box 41, while a portion of the sorting air flows from bottom to top in the lower screen 46, the first upper screen 43, and the second upper screen 45.

[0161] Furthermore, the threshed material leaking from the front of the receiving mesh 23 is supplied to the vibrating plate 42, the threshed material leaking from the middle of the receiving mesh 23 is supplied to the first upper screen 43, and the threshed material leaking from the rear of the receiving mesh 23 is supplied to the second upper screen 45. Moreover, the threshed material supplied to the vibrating plate 42 is supplied to the first upper screen 43 along with the oscillation of the screen box 41.

[0162] The first upper screen 43 swings integrally with the screen box 41, causing the threshed material to fall downwards. Conversely, the threshed material that cannot be threshed through the first upper screen 43 is conveyed backwards along the upper part of the first upper screen 43 by the swinging motion. In addition, the threshed material that falls through the first upper screen 43 is screened only by the lower screen 46, and is recovered as primary material by the primary material recovery unit 34 as primary material.

[0163] Furthermore, as described above, the threshed material conveyed rearward from the upper part of the first upper screen 43 is supplied to the second upper screen 45. During this supply, lighter amounts of threshed material, such as straw fragments, are blown rearward by the separating airflow. Figure 3 , Figure 6 The discharge path EX1 shown discharges to the outside of the threshing device T.

[0164] Furthermore, the second upper screen 45, by swinging integrally with the screen box 41, causes the threshed material to fall downwards. Conversely, the threshed material that cannot fall through the second upper screen 45 is conveyed rearward along the upper part of the second upper screen 45 by the swinging motion. Additionally, the threshed material that falls through the second upper screen 45 is recycled as secondary processing material to the secondary processing material recycling section 35. As described above, the threshed material conveyed rearward from the upper part of the second upper screen 45 is blown rearward by the sorting air. Figure 3 , Figure 6 The discharge path EX1 shown discharges to the outside of the threshing device T.

[0165] Thus, the sorting unit 30, through the operation of the conveying mechanism 36, supplies and stores the grains recovered by the primary processing material recovery unit 34 to the grain bin 12. Additionally, the sorting unit 30, through the operation of the reduction device 37, returns the secondary processed material recovered by the secondary processing material recovery unit 35 to the front of the oscillating sorting device 31. Thereby, the grains contained in the reduced secondary processed material are separated in the oscillating sorting device 31 and recovered by the primary processing material recovery unit 34.

[0166] Discharge path EX1 is at the rear end of sieve box 41 and Figure 3 , Figure 4 The straw processing device 50 shown has a space formed between the flow guide plates 26 (an example of the flow guide section) to discharge the threshed material obliquely downwards and backwards.

[0167] [Threshing device: Straw processing device]

[0168] like Figure 3 , Figure 4As shown, at the rear of the threshing device T, there is a flow guide plate 26 that sends the straw discharged from the dust outlet 25 downwards and backwards (in the same direction as the movement direction of the harvest in the threshing chamber 21). The path through which the straw is sent out on the upper surface of the flow guide plate 26 is called the dust discharge path EX2.

[0169] The straw processing device 50 includes: a cutting shaft 51 positioned laterally above the flow guide plate 26; a plurality of cutting blades 52 disposed on the cutting shaft 51; and a plurality of fixing blades 53 fixed in a position that overlaps with the cutting blades 52 when viewed from the side of the machine body and protrudes from the upper surface of the flow guide plate 26.

[0170] Furthermore, when viewed from the side, the straw processing device 50 has multiple cutting blades 52 positioned in a cross-shaped orientation, and these blades are arranged at predetermined intervals along the axis of the cutting shaft 51. With this configuration, the straw processing device 50 functions as a shredding unit, which, driven by the rotation of the cutting shaft 51, shreds and discharges the straw discharged from the dust outlet 25 into the dust discharge path EX2 using the multiple cutting blades 52 and the fixed blades 53.

[0171] In addition, such as Figure 3 , Figure 4 , Figure 6 As shown, the threshing section 20 has a limiting plate 55 between the rear end of the receiving net 23 in the threshing chamber 21 and the left and right side walls 221a of the threshing chamber 21 to prevent some of the straw, dust and other particles from flowing into the sorting section 30.

[0172] [Threshing device: sensor]

[0173] like Figure 3 , Figure 4 , Figure 6 As shown, in order to detect the defective situation of grains being discharged from the oscillating sorting device 31 to the discharge path EX1, the combine harvester A has a grain detection sensor S1 in the area of ​​the flow guide plate 26 on the side opposite to the straw processing device 50 to detect grains scattered from the oscillating sorting device 31.

[0174] That is, a cover 27 is provided on the lower side of the flow guide plate 26 in a longitudinal position. The cover 27 has openings 27a formed at two locations near its outer ends in the lateral direction (see reference). Figure 4 The grain detection sensor S1 is provided in such a way that the detection surface is exposed from the opening 27a of the two parts, thereby realizing the close arrangement of the two grain detection sensors S1 relative to the rear end of the swing sorting device 31.

[0175] In particular, since the receiving net 23 is formed in an arc shape centered on the rotating shaft X, the distribution of the threshed material leaking from the receiving net 23 tends to increase as the area moving away from the central region (the area overlapping with the rotating shaft X) of the receiving net 23 in the left and right directions increases when viewed from above. Therefore, compared to the central region in the left and right directions, more grains fly out from the swing sorting device 31 in the outer region. By placing the grain detection sensor S1 at a position on the outer side of the deflector 27 in the left and right directions, efficient detection of grains flying out from the rear end of the swing sorting device 31 can be achieved.

[0176] The grain detection sensor S1 uses a sensor that functions as a pressure sensor, which detects the pressure of grains that collide with the detection surface when they fly into the discharge path EX1 as an electrical signal. In addition, in this structure, a cover 27 protects the main body and wiring of the grain detection sensor S1.

[0177] Moreover, such as Figures 4-6 As shown, the combine harvester A, located in the area below the receiving net 23 and above the sorting section 30, downstream of the threshing chamber 21 in the direction of transport of the threshed material (crop), is equipped with leakage sensors S2 in the space between the two sides of the receiving net 23 in the circumferential direction and the inner sides of the left and right side walls to detect grains leaking from the receiving net 23. Furthermore, two leakage sensors S2 are located in... Figure 4 , Figure 5 When viewed in the indicated direction, it is positioned lower than both sides of the receiving net 23 and higher than the lowest position of the receiving net 23.

[0178] The leakage sensor S2 uses a sensor that functions as a pressure sensor to detect the pressure of the grains leaking from the receiving net 23 when they collide with the net as an electrical signal.

[0179] The left and right leakage sensors S2 are arranged in an inclined position, getting closer to the center as they move lower. That is, on the inner side of the left and right sidewalls 221a, the support portion has a support frame 28 that is inclined as it moves closer to the center in the left-right direction as it moves lower. Therefore, the leakage sensors S2 are supported by the support portion of the support frame 28, and thus, when viewed along the direction of the rotation axis X, the leakage sensors S2 are arranged in an orientation that is parallel to the tangent of the support net 23 on each side of the receiving net 23 (an orientation that is parallel to the tangent of the receiving net 23 near the position of the leakage sensor S2). In addition, by arranging the leakage sensors S2 in this way, the detection surface of the leakage sensors S2 is also inclined along the orientation of the two sides of the receiving net 23.

[0180] The support frame 28 is configured to support the inner surfaces of the left and right side walls 221a of the threshing chamber 21. By supporting the leakage sensor S2 on the support frame 28, the angle at which the grains are incident on the detection surface of the leakage sensor S2 is close to 90 degrees, which enables the detection of grains with high sensitivity.

[0181] In addition, such as Figure 5 , Figure 6 As shown, the threshing section 20 is located in the region below the receiving net 23 and above the sorting section 30, upstream of the leakage sensor S2 in the conveying direction, and has a partition 29 with a longitudinal orientation that intersects the rotating shaft X.

[0182] The partition 29 is supported on the inner surface of the left and right side walls 221a of the threshing chamber 21 at a position upstream of the leakage sensor S2, to prevent poor contact between the grains leaking from the receiving net 23 at the position upstream of the leakage sensor S2 and the detection surface of the leakage sensor S2, thereby suppressing false detection of grains.

[0183] like Figure 2 , Figure 3 , Figure 6 As shown, in the left and right partitions 29, the partition on the right side of the vehicle body 1 is positioned further forward than the partition on the left side. Similarly, in the left and right leakage sensors S2, the leakage sensor on the right side of the vehicle body 1 is positioned further forward than the leakage sensor on the left side. In particular, as Figure 3 As shown, the right partition 29 is positioned above the area where the document purifier 44 and the second upper screen 45 overlap vertically, and the left partition 29 is positioned above the central area in the front-back direction of the second upper screen 45.

[0184] [Threshing control device]

[0185] like Figure 14 As shown, the combine harvester A is equipped with a threshing control device 60, which reduces grain loss from the oscillating sorting device 31 to the discharge path EX1 and from the dust discharge port 25 to the dust discharge path EX2.

[0186] The threshing control device 60 has processing capabilities capable of program-based processing, similar to a microprocessor or DSP (Digital Signal Processor). The threshing control device 60 receives detection signals from the pair of grain detection sensors S1, the pair of leakage sensors S2, and the throughput sensor S3. Furthermore, the threshing control device 60 outputs control signals to the dust valve control unit 71, the sieve angle control unit 72, and the display unit 73. The display unit 73 is located inside the operator's cab 10 of the operator's cab 9, displaying necessary information to the operator.

[0187] The threshing control device 60 includes a grain loss determination unit 61, a grain loss estimation unit 62, and a loss reduction control unit 63. These are configured as software. Alternatively, a portion of the grain loss determination unit 61, the grain loss estimation unit 62, and the loss reduction control unit 63 may also be configured as hardware such as logic circuits or EEPROM.

[0188] The grain loss determination unit 61 determines the amount of grain discharged from the discharge path EX1 (grain loss) based on the detection signal of the grain detection sensor S1. The grain loss estimation unit 62 estimates the amount of grain discharged from the dust discharge path EX2 as grain loss based on the detection signal of the leakage amount sensor S2, and estimates the amount of grain discharged from the discharge path EX1 as grain loss based on the detection signal of the processing amount sensor S3.

[0189] In particular, the grain loss estimation unit 62 generates a correlation table of the detection signals of the left and right leakage amount sensors S2 and the grain loss by performing a simulation in advance. By referring to the correlation table in the detection signals of the leakage amount sensors S2, the amount of grain discharged from the dust discharge path EX2 (grain loss) is estimated.

[0190] The loss reduction control unit 63 controls at least one of the dust valve control unit 71 and the sieve angle control unit 72 based on the detection signals from the grain detection sensor S1, the leakage sensor S2, and the processing volume sensor S3, thereby reducing grain loss.

[0191] [Threshing control device: reduction of grain loss in discharge path EX1]

[0192] For example, when the amount of harvested material supplied to the oscillating sorting device 31 increases, grains may sometimes be discharged from the rear end of the screen box 41 toward the discharge path EX1. Thus, when grains are discharged toward the discharge path EX1, they are scattered due to the air pressure of the sorting air, and the grain detection sensor S1 can detect the collision of grains based on pressure.

[0193] The grain loss determination unit 61 determines the amount of grains lost when the amount detected by the grain detection sensor S1 exceeds a preset threshold. While all grains detected by the grain detection sensor S1 could be considered a loss, since the amount detected by the grain detection sensor S1 contains some error, a threshold is set, and the amount of grains lost when it exceeds this threshold is considered a grain loss.

[0194] Furthermore, when the grain loss determination unit 61 determines that there is grain loss, the loss reduction control unit 63 controls the angle of the sieve plates of the first upper sieve 43 and the second upper sieve 45 to be increased proportionally to the value of grain loss via the sieve angle control unit 72. This control increases the amount of threshed material leaking downwards from the first upper sieve 43 and the second upper sieve 45, thereby suppressing the loss of grains that are wastedly discharged through the discharge path EX1.

[0195] Furthermore, the sorting unit 30 uses the air pressure of the sorting air to discharge the threshed material downwards from the rear end of the sieve box 41 along the discharge path EX1. Moreover, if the threshed material contains grains, the lighter particles such as straw or dust are carried downwards along the discharge path EX1 by the sorting air, while the heavier grains are dispersed and reach the detection surface of the grain detection sensor S1. This improves the accuracy of grain quantity detection.

[0196] Furthermore, if the amount of threshed material detected by the throughput sensor S3 exceeds a preset threshold, the grain loss estimation unit 62 also estimates grain loss. That is, since the throughput sensor S3 detects the amount of threshed material accumulated on the first upper screen 43 of the oscillating sorting device 31, the grain loss estimation unit 62 estimates that an amount of grain proportional to the amount of threshed material will be discharged from the rear end of the screen box 41.

[0197] Thus, when the grain loss estimation unit 62 determines the grain loss based on the amount of threshed material detected by the processing quantity sensor S3, the loss reduction control unit 63, as described above, controls the angle of the screen plates of the first upper screen 43 and the second upper screen 45 to increase via the screen angle control unit 72. This increases the amount of threshed material leaking downwards in the first upper screen 43 and the second upper screen 45, suppressing the loss of grains that are wastedly discharged from the discharge path EX1.

[0198] In particular, in the oscillating sorting device 31, the second screen plate 45a at the rear end of the conveying direction of the threshed material in the oscillating sorting device 31, one of the multiple second screen plates 45a of the second upper screen 45, is used as a limiting lip Lx, so that its upward protrusion is greater than that of the other second screen plates 45a. Therefore, by increasing the angle of the second upper screen 45, the flow of the threshed material is restricted at the rear end of the second upper screen 45, and the passage of grains contained in the threshed material is promoted at this location, thereby achieving a better reduction in grain loss.

[0199] [Threshing control device: reduction of grain loss in dust discharge path EX2]

[0200] For example, when the amount of harvest supplied to the threshing chamber 21 increases, the amount of grains discharged in a state of being mixed with the straw discharged from the dust discharge path EX2 increases.

[0201] Furthermore, the amount of grains discharged from the dust discharge path EX2 can be estimated based on the amount of grains leaking from the receiving net 23 near the dust discharge port 25. For this reason, the leakage amount sensor S2 detects the amount of grains leaking from the receiving net 23 downstream of the harvest transport direction. Based on this detected amount of grains, the grain loss estimation unit 62 estimates the grain loss from the amount of grains discharged from the dust discharge path EX2. If the estimated grain loss exceeds a preset threshold, the loss reduction control unit 63 controls the dust delivery valve 24 via the dust delivery valve control unit 71, thereby reducing the grain loss discharged from the dust discharge path EX2.

[0202] That is, by controlling the posture of the dust valve 24 (by setting the angle to reduce the conveying speed of the harvest), the time spent on threshing the harvest in the threshing chamber 21 is extended, thereby increasing the amount of threshed material leaking from the receiving net 23. As a result, the loss of grains discharged from the dust discharge path EX2 is suppressed.

[0203] In this control system, the time from when the harvested material is supplied to the threshing chamber 21 to when it is discharged from the dust outlet 25 is extended by controlling the posture of the dust supply valve 24. Therefore, to prevent an excessive amount of harvested material from being supplied to the threshing chamber 21, the threshing control device 60 displays messages, icons, etc., urging a reduction in travel speed to the display unit 73. Thus, the operator can manually reduce the travel speed of the combine harvester A, thereby supplying an appropriate amount of harvested material to the threshing chamber 21 to continue the harvesting operation.

[0204] In particular, the combine harvester A displays messages and icons on display unit 73 indicating that the reduction of grain loss has not been sufficiently achieved. This not only reduces grain loss through automatic control, but also achieves a better reduction of grain loss through the operator's manual operation.

[0205] [Effects of the Implementation Method 1]

[0206] Because of this structure, when the amount of threshed material supplied to the oscillating sorting device 31 increases, by setting the limiting lip Lx to an upright position in conjunction with the setting of the oscillating posture of the plurality of second screen plates 45a, the transfer of the threshed material can be suppressed, and the leakage of the grains contained in the threshed material can be promoted in the first upper screen 43 and the second upper screen 45, thereby preventing the grains from being wastefully discharged from the rear end of the screen box 41.

[0207] Furthermore, when the throughput sensor S3 detects an increase in the amount of threshed material, the leakage of the threshed material is increased by widening the angle of the swing posture of the first upper screen 43 and the second upper screen 45. As a result, the backward movement of the threshed material is suppressed by the limiting lip Lx, preventing the undesirable situation of grains scattering into the discharge path EX1.

[0208] When the grain detection sensor S1 detects that grains are scattered from the rear edge 41a of the sieve box 41 toward the discharge path EX1, by increasing the swing angle of the first upper sieve 43 and the second upper sieve 45, the leakage of the threshed material can be increased, and the undesirable situation of grains scattering toward the discharge path EX1 can be suppressed.

[0209] In particular, by expanding the angle of the swing posture of the first upper screen 43 and the second upper screen 45, the lip Lx is restricted to an upright posture. Therefore, it is possible to effectively prevent the threshed material from being moved to the rear of the swing sorting device 31 above the first upper screen 43 and the second upper screen 45, and the grains being discharged together with the threshed material into the discharge path EX1.

[0210] [Effects of the Implementation Method 2]

[0211] Thus, since the grain detection sensor S1 is located on the cover 27 below the flow guide plate 26 in a longitudinal orientation, it is not necessary to use a bracket-like device to support the grain detection sensor S1. Because the detection surface of the grain detection sensor S1 can be set in a longitudinal orientation and the grain detection sensor S1 can be positioned close to the rear end of the oscillating sorting device 31, grains scattered from the rear end of the oscillating sorting device 31 can also be detected effectively.

[0212] In addition, the space for conveying straw, dust, etc. discharged from the dust outlet 25 and the space for arranging the grain detection sensor S1 are separated by the flow guide 26. Therefore, when the grains fly outward from the rear end of the swing sorting device 31, the dust and other particles discharged from the dust outlet 25 will not invade the space where the grains fly. This can suppress the phenomenon that the flying grains come into contact with dust and other particles and the flying speed decreases, and can maintain a high level of accuracy in detecting grains.

[0213] Furthermore, the receiving mesh 23 is arc-shaped along the direction of the rotating axis X. Therefore, when viewed from the direction of the rotating axis X, the amount of threshed material leaking down from the two sides of the receiving mesh 23 (near the side wall 221a of the threshing chamber 21) is greater than the amount of threshed material leaking down from the center of the receiving mesh 23. As a result, the amount of grains scattered into the discharge path EX1 tends to increase near both ends in the width direction of the flow guide plate 26. For this reason, by providing grain detection sensors S1 at two locations near the outer end in the lateral width direction of the cover 27, the amount of grains scattered into the discharge path EX1 can be detected with high precision.

[0214] When the grain loss determination unit 61 determines that there is a grain loss based on the amount of grain detected by the grain detection sensor S1, the sieve angle control unit 72 controls the angle of the sieve plates of the first upper sieve 43 and the second upper sieve 45 to increase the amount of threshed material passing through the first upper sieve 43 and the second upper sieve 45, thereby suppressing the loss of grains that are wastedly discharged from the discharge path EX1.

[0215] [Effects of the Implementation Method 3]

[0216] In this combine harvester A, in the area below both sides of the receiving net 23 and above the sorting section 30, downstream of the direction of the harvest in the threshing chamber 21, in the space between the two sides of the receiving net 23 in the circumferential direction and the inner side of the left and right side walls 221a, a leakage amount sensor S2 is provided in an orientation along the respective orientation of the two sides of the receiving net 23 to detect the grains that leak down from the receiving net 23.

[0217] Therefore, it is possible to detect the grains leaking from the receiving net 23 by using the detection surface of the leakage sensor S2 to catch them. In addition, since the leakage sensor S2 is arranged on both the left and right sides, the leakage amount can be accurately detected even if there is a deviation in the amount of grains leaking from the receiving net 23 as the threshing cylinder 22 rotates.

[0218] In addition, since the leakage sensor S2 is set at an angle, the grains can be incident on the detection surface of the leakage sensor S2 at a near-vertical angle, enabling the detection of grains with high sensitivity.

[0219] Moreover, even when straw scraps or dust come into contact with the detection surface of the leakage sensor S2, they can be sent out at an angle downwards by their own weight, preventing the accumulation of straw scraps or dust and avoiding the adverse situation of reduced detection accuracy of grains.

[0220] In the direction of the harvested material transfer in the threshing chamber 21, a partition wall 29 with an orthogonal orientation to the rotating shaft X is provided at a position upstream of the leakage sensor S2. Therefore, grains leaking from the receiving net 23 at a position upstream of the leakage sensor S2 will not come into contact with the leakage sensor S2, thus suppressing false detection of grains.

[0221] Furthermore, if the amount of harvested material supplied to the threshing chamber 21 increases and the amount of grains detected by the left and right leakage sensors S2 increases, the grain loss estimation unit 62 estimates the amount of grains discharged into the dust discharge path EX2 as grain loss. Moreover, if the estimated grain loss exceeds a preset threshold, the loss reduction control unit 63 controls the dust conveying valve control unit 71, thereby reducing the speed at which the harvested material is transferred in the threshing chamber 21 and suppressing grain loss in the dust discharge path EX2.

[0222] [Other Implementation Methods]

[0223] In addition to the embodiments described above, the present invention may also be configured as follows (for parts having the same function as in the embodiments, the same numbers and reference numerals as in the embodiments are marked).

[0224] (a) The number of limiting lips Lx is not limited to one, but can also be multiple. In the case of having multiple limiting lips Lx, it is also effective to leave a gap between the multiple limiting lips Lx. In addition, by configuring them near the rear end edge 41a of the screen box 41, the threshing performance can be maintained to a higher degree.

[0225] (b) The limiting lip Lx is positioned forward of the rear end position in the conveying direction of the threshed material. That is, the second screen plate 45a is positioned at the rear end position, and the limiting lip Lx is positioned forward of it. With the limiting lip Lx configured in this way, multiple limiting lips Lx may also be used, as described in another embodiment (a).

[0226] (c) Instead of having both a first upper screen 43 and a second upper screen 45, the sorting section 30 may be configured with a single upper screen. In this way, even with a single upper screen, grain loss can be suppressed by having a limiting lip Lx, and the screening process can be simplified.

[0227] (d) In order to adjust the air volume of the air separator 33, for example, it is equipped with a continuously variable transmission mechanism that changes the rotational speed transmitted from the engine to the air separator 33, or multiple tensioned clutches, and has an actuator to realize these speed changes.

[0228] In this other embodiment (d), when grain loss is determined by the grain loss determination unit 61, the angle of the sieve plate is increased by the sieve angle control unit 72, and the air volume of the sorting air is increased at the same time, thereby improving the sorting performance and reducing grain loss.

[0229] (e) In order to adjust the number of swings per unit time of the swing sorting device 31, similar to the other embodiment (d) described above, the transmission system that transmits driving force from the engine to the swing drive mechanism 32 is provided with a continuously variable transmission mechanism or multiple clutches with tension, and is provided with actuators to realize these speed changes.

[0230] In this other embodiment (e), when grain loss is determined, while controlling the angle of the sieve plate to increase by the sieve angle control unit 72, the number of oscillations of the oscillating sorting device 31 is also increased, thereby improving sorting performance and reducing grain loss.

[0231] (f) Multiple leakage sensors S2 are arranged in the space between the two sides of the receiving net 23 in the circumferential direction and the inner sides of the left and right side walls 221a of the threshing chamber 21. That is, consider arranging two or more leakage sensors S2 on the left and right sides. By increasing the number of leakage sensors S2 in this way, the amount of grain leaking from the receiving net 23 can be detected with high accuracy.

[0232] (g) As a variation of another embodiment (f), a plurality of leakage sensors S2 are arranged in a front-to-back direction in the aforementioned left-to-right space. Based on the amount of grains flowing down detected by the leakage sensors S2 in a front-to-back position, the tendency of the amount of grain leakage in the front-to-back direction is calculated at the rear end position of the receiving net 23, and reflected in the estimation of grain loss performed by the grain loss estimation unit 62.

[0233] That is, the amount of grains leaking from the receiving net 23 decreases towards the rear end (the terminal side in the conveying direction), and the tendency to decrease varies depending on the state of the harvested grains. Based on this reasoning, the tendency to decrease the amount of grains detected by the multiple leakage amount sensors S2 arranged in the front-to-back direction is obtained, and this tendency to decrease and the amount of grains detected by the multiple leakage amount sensors S2 are provided to the grain loss estimation unit 62, thereby improving the estimation accuracy of the amount of grains discharged from the dust discharge port 25 (grain loss).

[0234] (h) is configured to allow for arbitrary changes in the tilt orientation of the left and right leakage sensors S2. It is also configured to allow for changes in the position of the left and right leakage sensors S2 in the forward and backward direction.

[0235] (g) The present invention can be used in harvesters for threshing harvested crops.

[0236] [2] Second implementation method

[0237] The second embodiment of the present invention will be described with reference to the accompanying drawings. Furthermore, in the following description, [the following will be used to describe the second embodiment]. Figure 15 , Figure 16 , Figure 19 , Figure 20 The direction of arrow F is set to "forward", and the direction of arrow B is set to "backward". Figure 16 , Figure 17 , Figure 19 The direction of arrow L is set to "left", and the direction of arrow R is set to "right". Additionally, [the following text is incomplete and requires further context: "to set the direction of arrow L to "left" and arrow R to "right"]. Figure 15 , Figure 17 , Figure 20 The direction of arrow U is set to "up", and the direction of arrow D is set to "down".

[0238] [The overall structure of a combine harvester]

[0239] like Figure 15 As shown, the full-feed combine harvester 201 (equivalent to the "harvester" of the present invention) includes a harvesting device H, a tracked traveling device 211, a driving unit 212, a threshing device 213, a grain bin 214, a conveying unit 216, a grain discharge device 218, and an engine E.

[0240] The travel device 211 is located at the lower part of the combine harvester 201. Furthermore, the travel device 211 is driven by power from the engine E. Moreover, the combine harvester 201 is capable of moving independently using the travel device 211.

[0241] In addition, the driver's unit 212, threshing device 213, and grain bin 214 are located on the upper side of the traveling device 211. An operator can ride in the driver's unit 212 to monitor the operation of the combine harvester 201.

[0242] In addition, the operator can also monitor the operation of the combine harvester 201 from outside the machine.

[0243] A grain discharge device 218 is located on the upper side of the grain bin 214. A harvesting device H is located at the front of the combine harvester 201. Furthermore, a conveying unit 216 is located at the rear of the harvesting device H. The harvesting device H includes a harvesting blade 215 and a reel 217.

[0244] The harvester blade 215 harvests the upright rice stalks in the field. Additionally, the reel 217, while rotating around its shaft 217b along the left-right direction of the machine body, gathers the upright rice stalks of the harvested crop. The harvested rice stalks K (see reference) are harvested by the harvester blade 215. Figure 18 It is conveyed to the conveying unit 216.

[0245] That is, the harvesting device H has a reel 217 that rotates and gathers the upright rice stalks at the same time.

[0246] According to this structure, the harvesting device H harvests the grain in the field. Moreover, the combine harvester 201 is capable of harvesting while simultaneously moving along the travel device 211, using the harvesting blades 215 to cut the upright stalks of the grain in the field.

[0247] The harvested rice straw K, harvested by the harvesting device H, is conveyed to the rear of the machine via the conveyor section 216. From there, the harvested rice straw K is conveyed to the threshing device 213.

[0248] In the threshing device 213, the harvested rice stalks K are threshed. The resulting grains are stored in the grain bin 214. The grains stored in the grain bin 214 are discharged out of the machine as needed through the grain discharge device 218.

[0249] Here, the harvesting device H is installed on a combine harvester 201 that performs harvesting operations in the field. The structure of the harvesting device H will be described in detail below.

[0250] [Structure of the harvesting device]

[0251] like Figures 15 to 17 As shown, the harvesting device H includes a harvesting frame 220. The harvesting frame 220 is configured to receive the harvested rice stalks K harvested by the harvester blade 215.

[0252] That is, the harvesting device H has a harvesting frame 220 for receiving harvested rice straw K.

[0253] The harvesting frame 220 has left and right side walls 221, a rear wall 222, and a bottom plate 223. The rear wall 222 is located at the rear end of the harvesting frame 220 and is arranged to span the left and right side walls 221.

[0254] That is, the harvesting frame 220 has left and right side walls 221 and a rear wall 222 located at the rear end of the harvesting frame 220 and spanning the left and right side walls 221.

[0255] The base plate 223 is located at the lower part of the harvesting frame 220. In addition, the base plate 223 is set in a state that spans the left and right side walls 221.

[0256] Additionally, retractable reel cylinders 217A are supported on the upper part of the left and right side walls 221.

[0257] When the reel cylinder 217A is controlled in the extension direction, the reel 217 rises relative to the harvest frame 220.

[0258] Additionally, if the reel cylinder 217A is controlled in the contraction direction, the reel 217 descends relative to the harvest frame 220.

[0259] According to this structure, such as Figure 15 As shown, the reel 217 can be raised and lowered relative to the harvesting frame 220. That is, the harvesting device H has a reel cylinder 217A for raising and lowering the reel 217.

[0260] In addition, such as Figure 16 as well as Figure 17 As shown, the harvesting blade 215 is supported on the base plate 223. Furthermore, the harvesting blade 215 extends in the left-right direction. Additionally, in this embodiment, the harvesting width direction of the harvesting device H is the left-right direction.

[0261] That is, the harvesting device H has a harvesting blade 215 supported on the harvesting frame 220 and extending along the harvesting width direction.

[0262] The harvester blade 215 includes a fixed blade 230 and a movable blade 231. The fixed blade 230 is positioned to protrude forward. The fixed blade 230 is supported on a base plate 223. The movable blade 231 reciprocates in the left-right direction of the machine body using a driving force transmitted from a movable blade drive mechanism (not shown). Thus, the movable blade 231 reciprocates relative to the fixed blade 230 in the left-right direction of the machine body. Furthermore, the harvester blade 215 cuts upright rice stalks using both the fixed blade 230 and the movable blade 231.

[0263] Here, Figure 16 Line P in the diagram represents the center position of the harvesting frame 220 in the left-right direction. The conveying unit 216 is located to the left of line P. That is, the conveying unit 216 is positioned to the left of the center position of the harvesting frame 220 in the left-right direction. Furthermore, the front end of the conveying unit 216 is connected in communication with the rear wall 222.

[0264] Additionally, the harvesting device H includes an auger 240. The auger 240 is driven to rotate around an auger shaft 240b. The auger shaft 240b is aligned with the left-right direction of the machine body.

[0265] like Figure 16 as well as Figure 17 As shown, the auger 240 has a first helix 241, a second helix 242, and a gripping claw 243. The first helix 241 and the second helix 242 are helical. In addition, the gripping claw 243 is rod-shaped and protrudes radially outward from the auger 240.

[0266] The gripper 243 is positioned opposite the front end of the conveyor section 216. Furthermore, the first auger 241 is positioned to the right of the gripper 243. Additionally, the second auger 242 is positioned to the left of the gripper 243.

[0267] As the auger 240 rotates, the first auger 241 conveys the harvested rice stalks K received from the harvesting frame 220 to the left. Simultaneously, the second auger 242 conveys the harvested rice stalks K received from the harvesting frame 220 to the right. Furthermore, the raking claw 243 pulls the harvested rice stalks K towards the rear of the machine.

[0268] In addition, such as Figure 16 as well as Figure 17 As shown, the harvesting device H has left and right dividers 250 protruding forward. The left divider 250 is supported at the front end of the left side wall 221. The right divider 250 is supported at the front end of the right side wall 221.

[0269] [Structure of the guiding section]

[0270] like Figure 16 as well as Figure 17 As shown, the harvesting device H includes a guide section 206. The guide section 206 is rod-shaped. Furthermore, as... Figure 16 As shown, the guide 206 is located behind the harvester 215.

[0271] In this embodiment, the guide portion 206 is mounted on the left side wall 221. Furthermore, the guide portion 206 is positioned to span both the left side wall 221 and the rear wall 222. Moreover, the guide portion 206 extends towards the right as it recedes further back. That is, the guide portion 206 extends towards the center of the harvest width direction as it recedes further back.

[0272] That is, the guide section 206 is located behind the harvester 215, and extends in a state where the further back it is, the more central it is in the harvest width direction.

[0273] Additionally, the guide section 206 is not installed on the right-side side wall 221.

[0274] However, the present invention is not limited thereto. For example, the guide portion 206 may be installed on the right side wall 221, and the guide portion 206 may be configured to span across the right side wall 221 and the rear wall 222. In this case, the guide portion 206 may or may not be installed on the left side wall 221.

[0275] That is, the guide section 206 is configured to span the side wall 221 and the rear wall 222.

[0276] Moreover, such as Figure 18As shown, the guide 206 guides the harvested rice stalk K located at the left end of the harvesting frame 220 to the right.

[0277] That is, at least one of the left and right side walls 221 is equipped with a guide part 206 for guiding the harvested rice stalks K harvested by the harvester blade 215.

[0278] In addition, such as Figure 16 As shown, the front end of the guide section 206 is located further forward than the reel cylinder 217A. Additionally, as... Figure 15 As shown, the guide portion 206 is positioned at a position that overlaps with the upper part of the side wall 221 when viewed from the side.

[0279] In this embodiment, the guide portion 206 extends in a straight line. However, the present invention is not limited to this; the guide portion 206 may be bent or smoothly curved.

[0280] [Structure of the transverse conveyor component]

[0281] like Figure 16 as well as Figure 19 As shown, the harvesting device H includes left and right lateral conveying members 270. The left and right lateral conveying members 270 are fixed to the movable blade 231. Therefore, the left and right lateral conveying members 270 and the movable blade 231 reciprocate together in the left-right direction of the machine body. Furthermore, as... Figure 20 As shown, each transverse conveying component 270 is positioned to extend rearward and upward from the movable blade 231.

[0282] like Figure 16 As shown, the length of the left-hand transverse conveying member 270 in the left-right direction is shorter than that of the right-hand transverse conveying member 270 in the left-right direction. Furthermore, the left-hand transverse conveying member 270 is positioned to the left of the conveying section 216. Conversely, the right-hand transverse conveying member 270 is positioned to the right of the conveying section 216.

[0283] Based on the above structure, the left-side transverse conveying unit 270 reciprocates in the left-right direction of the machine body while conveying the harvested rice straw K to the right. Meanwhile, the right-side transverse conveying unit 270 reciprocates in the left-right direction of the machine body while conveying the harvested rice straw K to the left.

[0284] Here, as Figure 19 as well as Figure 20 As shown, each transverse conveying component 270 has multiple support portions 271 and straw action portions 272. Figure 20 As shown, the support portion 271 and the straw action portion 272 are fastened together by the first bolt and nut b1. In addition, the support portion 271 is fixed to the upper surface of the movable blade 231 by the second bolt and nut b2.

[0285] In addition, such as Figure 20 As shown, a harvester support 51 is fixed to the front end of the base plate 223. Furthermore, a fixing blade 230 is fixed to the harvester support 51.

[0286] In addition, the straw working part 272 has multiple protrusions 272a. For example... Figure 16 As shown, in the left-side transverse conveying member 270, a plurality of protrusions 272a extend toward the right rear. Additionally, in the right-side transverse conveying member 270, a plurality of protrusions 272a extend toward the left rear.

[0287] Here, Figure 20 The first bolt and nut b1 shown is configured to be detachable. Furthermore, by releasing the first bolt and nut b1, the support portion 271 and the straw action portion 272 can be separated. Moreover, as... Figure 19 As shown, with the straw action part 272 flipped over, the support part 271 and the straw action part 272 are tightened again by the first bolt and nut b1, thereby reversing the extension direction of the multiple protrusions 272a in the left and right directions.

[0288] That is, by flipping over the straw action part 272 in the left lateral conveying member 270, the plurality of protrusions 272a in the left lateral conveying member 270 extend towards the left rear. In addition, by flipping over the straw action part 272 in the right lateral conveying member 270, the plurality of protrusions 272a in the right lateral conveying member 270 extend towards the right rear.

[0289] Here, in Figure 19 The reference line Q is shown. Reference line Q is a line indicating the center position of the left and right bolt holes 272b of the straw action part 272. In other words, reference line Q is a line located at an equal distance from the left and right bolt holes 272b. The arrangement of the plurality of protrusions 272a is symmetrical about the left and right sides with respect to reference line Q. Therefore, when the straw action part 272 is flipped over, the extending directions of the plurality of protrusions 272a are reversed in the left and right directions, but the arrangement of the plurality of protrusions 272a remains unchanged. Furthermore, a bolt for inserting the first bolt nut b1 is inserted into the bolt hole 272b.

[0290] For example, such as Figure 19 As shown, the straw-operating part 272 on the left has three protrusions 272a. Furthermore, the central protrusion 272a of the three protrusions 272a is positioned at the baseline Q. Additionally, the distance from the left protrusion 272a to the baseline Q is equal to the distance from the right protrusion 272a to the baseline Q.

[0291] With the structure described above, the harvested rice stalks K are guided towards the center of the harvest width direction by the guide portion 206. This easily prevents the harvested rice stalks K from extending outwards from the harvest frame 220 in the harvest width direction. Furthermore, the guide portion 206 guides the harvested rice stalks K that are extending outwards from the harvest frame 220 in the harvest width direction, making it easier for them to be contained within the harvest frame 220. As a result, harvest losses are less likely to occur.

[0292] That is, if the structure described above is used, a harvesting device H that is unlikely to cause harvesting losses can be realized.

[0293] [Other Implementation Methods]

[0294] (1) The driving device 211 can be either wheeled or half-tracked.

[0295] (2) The guide portion 206 may not be rod-shaped. For example, the guide portion 206 may also be plate-shaped.

[0296] (3) The front end of the guide 206 can also be located at a position further back than the reel cylinder 217A.

[0297] (4) Alternatively, the reel cylinder 217A may not be installed.

[0298] (5) The guide part 206 may also be located in a position that does not overlap with the upper part of the side wall 221 when viewed from the side.

[0299] (6) The guide section 206 may also be configured to be so short that it does not reach the rear wall 222.

[0300] (7) This invention can be used not only for combine harvesters, but also for various harvesters other than combine harvesters.

[0301] Furthermore, the structures disclosed in the above embodiments (including other embodiments, hereinafter the same) can be combined with structures disclosed in other embodiments as long as they do not create contradictions. Additionally, the embodiments disclosed in this specification are illustrative, and the embodiments of the present invention are not limited thereto; appropriate modifications can be made without departing from the purpose of the present invention.

[0302] Explanation of reference numerals in the attached figures

[0303] 20 Threshing Section

[0304] 21 Threshing Chamber

[0305] 21a sidewall

[0306] 22 Threshing cylinder

[0307] 23 Contracting Network

[0308] 25 dust outlets

[0309] 26. Downflow guide plate (downflow guide section)

[0310] 27 masks

[0311] 28 Support Frame

[0312] 29 next door

[0313] 30-point selection department

[0314] 31 Swing Sorting Device

[0315] 41 sieve boxes

[0316] 41a rear edge

[0317] 45 sieve (second sieve)

[0318] 45a sieve plate (second sieve plate)

[0319] 50 Straw Processing Device

[0320] 60 Threshing Control Device (Control Device)

[0321] 61 Grain Loss Assessment Department

[0322] 62. Estimated Grain Loss Section

[0323] 72-sieve angle control unit

[0324] X-rotation axis

[0325] T threshing unit

[0326] Lx restricted lips

[0327] X-rotation axis

[0328] S1 Grain Detection Sensor

[0329] S2 Leakage Sensor

[0330] S3 Processing Capacity Sensor

[0331] 201 combine harvester (harvester)

[0332] 206 Guiding Department

[0333] 215 harvesting knife

[0334] 217 Harvester

[0335] 217A Reel Cylinder

[0336] 220 Harvest Framework

[0337] 221 sidewall

[0338] 222 Rear Wall

[0339] H Harvesting Device

[0340] K harvests rice stalks

Claims

1. A harvester, equipped with a harvesting device, and performing harvesting operations in a field, wherein, The harvesting device has: Harvesting frame, the harvesting frame receiving harvested rice straw; and A harvesting blade, which is supported on the harvesting frame and extends along the harvesting width direction. The harvesting frame has: left and right side walls; and a rear wall located at the rear end of the harvesting frame and extending across the left and right side walls. A guide is installed on at least one of the left and right side walls, the guide being used to guide the harvested rice stalks cut by the harvesting blade. The guide portion is located further back than the harvester blade, and extends in a manner that the further back it is, the closer it is to the center of the harvest width direction. The guide portion is configured to extend across the side wall and the rear wall. The harvester includes a conveying section that transports the harvested rice stalks harvested by the harvesting device to the rear. The front end of the conveying section is connected to the rear wall. The rear end of the guide is located between the left and right ends of the conveying part in the left-right direction.

2. The harvester as described in claim 1, wherein, have: A reel, which rotates while gathering upright rice stalks; and A reel cylinder that raises and lowers the reel. The front end of the guide is located at a position further forward than the reel cylinder.

3. The harvester as described in claim 1 or 2, wherein, The guide portion is positioned to overlap with the upper part of the sidewall when viewed from the side.

4. The harvester as described in claim 1 or 2, wherein, The guide portion is rod-shaped.

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