threshing equipment

Abstract

To increase durability of a connection frame and a chaff lip plate, in a thresher which comprises a chaff sieve supported by a sieve case, and which has the chaff sieve provided with the plurality of chaff lip plates supported by the sieve case in the state of being arranged at intervals along a sorting-processed object transfer direction and the state of being cable of changing an attitude and the connection frame for connecting the plurality of chaff lip plates together.SOLUTION: A plurality of fixing parts 80 for fixing a connection frame 70 to a side part 42A of a sieve case 42 in an adjustment position, in which movement is adjusted, are provided. The plurality of fixing parts 80 are dispersed in a direction along a sorting-processed object transfer direction of a chaff sieve 46.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a threshing device comprising: a threshing chamber to which harvested crops are supplied; a threshing drum rotatably mounted in the threshing chamber for threshing the supplied crops; a threshing section having a receiving net mounted below the threshing drum; a sieve case swingably mounted below the receiving net; and a sorting section supported by the sieve case and having a chaff sieve for receiving threshed material that has leaked from the receiving net as sorted material and sorting the received sorted material. [Background technology]

[0002] In the above-mentioned threshing device, for example as shown in Patent Document 1, the chaff sieve is provided with a plurality of chaff flip plates (sorting plates) that are aligned at intervals along the direction in which the chaff sieve transports the sorted material and are supported on the sieve case in a state in which their position can be changed, and a connecting frame (support frame) that connects the plurality of chaff flip plates, and the position of the plurality of chaff flip plates can be changed by adjusting the movement of the connecting frame. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5400566 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, when the sheave case is swung and moved by a swinging operation, the connecting frame swings, causing a twist between the connecting frame and the chaflip plate, which makes the connecting frame or the chaflip plate prone to wear.

[0005] The present invention aims to provide a threshing device that can improve the durability of the connecting frame and the chaflip plate. [Means for solving the problem]

[0006] The threshing device according to the present invention comprises: The present invention is provided with a threshing chamber to which harvested crops are supplied, a threshing drum rotatably provided in the threshing chamber for threshing the supplied crops, a threshing unit having a receiving net provided below the threshing drum, a sieve case swingably provided below the receiving net, and a sorting unit having a chaff sieve supported by the sieve case for receiving threshed material that has fallen through the receiving net as sorted material and sorting the received sorted material. The chaff sieve is provided with a plurality of chaff flip plates that are aligned at intervals along the transport direction of the chaff sieve and are supported by the sieve case in a positionally changeable state, and a connecting frame connecting the plurality of chaff flip plates. The positions of the plurality of chaff flip plates are changed by adjusting the movement of the connecting frame, and a plurality of fixing parts are provided for fixing the connecting frame to the side of the sieve case at adjusted positions, and the plurality of fixing parts are distributed in a direction along the transport direction of the sorted material. and a first fixing part among the plurality of fixing parts is supported by the side part so as to be swingable, and is configured to be positioned at a swing position corresponding to the adjustment position of the connecting frame by a plurality of first positioning holes provided in the first fixing part and one of the side part, while being positioned corresponding to each of the plurality of adjustment positions of the connecting frame, and a first positioning bolt that is attached to a first positioning hole selected from the plurality of first positioning holes and connects the first fixing part to the side part, and a second fixing part among the plurality of fixing parts is configured to be positioned at a swing position corresponding to the adjustment position of the connecting frame by a second oblong positioning hole provided in the second fixing part and one of the side part, and a second positioning bolt that is attached to the second positioning hole and connects the second fixing part to the side part.

[0007] According to this configuration, multiple parts of the connecting frame, which are located in a dispersed manner along the sorting material transport direction of the chaff sieve, are fixed to the side of the sieve case by fixing parts, so that the connecting frame is less likely to swing regardless of the oscillation of the sieve case, and twisting is less likely to occur between the connecting frame and the chaff flip plate, making the connecting frame or the chaff flip plate less likely to wear out, thereby improving the durability of the connecting frame and the chaff flip plate. According to this configuration, by swinging the first fixing part relative to the side part to a swing position corresponding to the adjustment position of the connecting frame, and attaching a first positioning bolt to a first positioning hole selected from the plurality of first positioning holes to connect the first fixing part to the side part, the first fixing part is put into an operative state and the connecting frame is fixed to the side part by the first fixing part. Because the second positioning hole of the second fixing part is elongated, if the connection of the second fixing part to the side part by the second positioning bolt is released when operating the first fixing part, the swing of the first fixing part transmitted to the second fixing part via the connecting frame will position the second fixing part at a swing position corresponding to the adjustment position of the connecting frame, and the connecting frame can be fixed to the side part by the second fixing part at the adjustment position simply by operating the second positioning bolt that connects the second fixing part to the side part, without performing any special operation to swing the second fixing part to a swing position corresponding to the adjustment position of the connecting frame, and the connecting frame can be fixed to the side part by the first fixing part and the second fixing part through a simple fixing operation.

[0008] In the present invention, It is preferable that the fixing portion be provided in an upstream region of the connecting frame that is located upstream of the central point in the sorting process material transport direction, and in a downstream region of the connecting frame that is located downstream of the central point in the sorting process material transport direction.

[0009] With this configuration, compared to when the connecting frame is fixed to the side at only one point, the length of the portion of the connecting frame from the point where it is fixed to the side in the upstream region to the upstream tip in the sorting material transport direction, and the length of the portion of the connecting frame from the point where it is fixed to the side in the downstream region to the downstream tip in the sorting material transport direction are each shorter.As a result, the connecting frame is less likely to swing despite the oscillation of the sieve case, and twisting is less likely to occur between the connecting frame and the chaflip plate, improving the durability of the connecting frame and the chaflip plate.

[0010]

[0011]

[0012] In the present invention, It is preferable that the first fixing portion is provided in the right-hand side area, and the second fixing portion is provided in the right-hand side area.

[0013] According to this configuration, the effort required to operate the first fixing part, which performs positioning by selecting a first positioning hole to which a first positioning bolt is attached from among a plurality of first positioning holes, is greater than the effort required to operate the second fixing part, which is positioned by swinging in conjunction with the first fixing part. However, by providing a drive mechanism in a portion of the sieve case on the downstream side in the sorting process transfer direction, a larger working space can be easily obtained on the side of the threshing device in the upstream region of the connecting frame than on the side of the threshing device in the downstream region of the connecting frame, and since the first fixing part is located in the upstream region of the connecting frame that is more likely to provide a larger working space, it is possible to easily fix the connecting frame to the side of the sieve case with the first fixing part and the second fixing part.

[0014] In the present invention, The system is provided with a No. 1 recovery section that recovers the No. 1 processed material sorted by the chaff sieve, and a No. 2 recovery section that is located downstream of the No. 1 recovery section in the sorted material transport direction and recovers the No. 2 processed material sorted by the chaff sieve, and it is preferable that the first fixing section is located above a point between the No. 1 recovery section and the No. 2 recovery section in the sorted material transport direction, and the second fixing section is located above the No. 2 recovery section.

[0015] According to this configuration, the length of the front part of the connecting frame from the position where the first fixing part is located to the upstream end in the direction of transport of the sorting material, the length of the middle part between the position where the first fixing part is located and the position where the second fixing part is located, and the length of the rear part from the position where the second fixing part is located to the downstream end in the direction of transport of the sorting material are not too short or too long, so the front, middle and rear parts of the connecting frame are less likely to swing regardless of the swinging of the sieve case, and twisting between the connecting frame and the chaflip plate is less likely to occur, making the connecting frame or the chaflip plate less likely to wear out.

[0016] The threshing device according to the present invention comprises: The present invention is provided with a threshing chamber to which harvested crops are supplied, a threshing drum rotatably provided in the threshing chamber for threshing the supplied crops, a threshing section having a receiving net provided below the threshing drum, a sieve case swingably provided below the receiving net, and a sorting section having a chaff sieve supported by the sieve case for receiving threshed material that has dropped through the receiving net as material to be sorted and sorting the received material to be sorted, the chaff sieve is provided with a plurality of chaff flip plates that are supported by the sieve case in a state where they are aligned at intervals along the direction in which the chaff sieve transfers the material to be sorted and in a state where their positions can be changed, and a connecting frame connecting the plurality of chaff flip plates, the positions of which are changed by adjusting the connecting frame, and a plurality of fixing parts for fixing the connecting frame to the side of the sieve case at the adjusted positions where the connecting frame is moved, the plurality of fixing parts being provided in a front The particles are dispersed in the direction along the direction of transport of the sorted material. The apparatus is provided with a No. 1 recovery section that recovers the No. 1 processed material sorted by the chaff sieve, and a No. 2 recovery section that is located downstream of the No. 1 recovery section in the sorted material transport direction and recovers the No. 2 processed material sorted by the chaff sieve, and the fixing section is located above a point between the No. 1 recovery section and the No. 2 recovery section in the sorted material transport direction, and the fixing section is located above the No. 2 recovery section. According to this configuration, multiple parts of the connecting frame, which are located in a dispersed manner along the sorting material transport direction of the chaff sieve, are fixed to the side of the sieve case by fixing parts, so that the connecting frame is less likely to swing regardless of the oscillation of the sieve case, and twisting is less likely to occur between the connecting frame and the chaff flip plate, making the connecting frame or the chaff flip plate less likely to wear out, thereby improving the durability of the connecting frame and the chaff flip plate. According to this configuration, the length of the front part of the connecting frame from the position where the first fixing part is located to the upstream end in the direction of transport of the sorting material, the length of the middle part between the position where the first fixing part is located and the position where the second fixing part is located, and the length of the rear part from the position where the second fixing part is located to the downstream end in the direction of transport of the sorting material are not too short or too long, so that the front, middle and rear parts of the connecting frame are less likely to swing regardless of the swinging of the sieve case, making it less likely for twisting to occur between the connecting frame and the chaflip plate and less likely for the connecting frame or the chaflip plate to wear out. In the present invention, It is preferable that the fixing portion be provided in an upstream region of the connecting frame that is located upstream of the central point in the sorting process material transport direction, and in a downstream region of the connecting frame that is located downstream of the central point in the sorting process material transport direction. With this configuration, compared to when the connecting frame is fixed to the side at only one point, the length of the portion of the connecting frame from the point where it is fixed to the side in the upstream region to the upstream tip in the sorting material transport direction, and the length of the portion of the connecting frame from the point where it is fixed to the side in the downstream region to the downstream tip in the sorting material transport direction are each shorter.As a result, the connecting frame is less likely to swing despite the oscillation of the sieve case, and twisting is less likely to occur between the connecting frame and the chaflip plate, improving the durability of the connecting frame and the chaflip plate. In the present invention, Preferably, the fixing portion located in the upright region and the fixing portion located in the downright region are each supported by the side portion so as to be able to swing, and a first fixing portion, which is one of the fixing portions located in the upright region and the downright region, is configured to be positioned at a swing position corresponding to the adjustment position of the connecting frame by a plurality of first positioning holes provided in the first fixing portion or one of the side portions, while being positioned corresponding to each of the plurality of adjustment positions of the connecting frame, and a first positioning bolt that is attached to a first positioning hole selected from the plurality of first positioning holes and connects the first fixing portion to the side portion, and a second fixing portion, which is the other of the fixing portion located in the upright region and the downright region, is configured to be positioned at a swing position corresponding to the adjustment position of the connecting frame by a second elongated positioning hole provided in one of the second fixing portion or the side portion, and a second positioning bolt that is attached to the second positioning hole and connects the second fixing portion to the side portion. According to this configuration, by swinging the first fixing part relative to the side part to a swing position corresponding to the adjustment position of the connecting frame, and attaching a first positioning bolt to a first positioning hole selected from the plurality of first positioning holes to connect the first fixing part to the side part, the first fixing part is put into an operative state and the connecting frame is fixed to the side part by the first fixing part. Because the second positioning hole of the second fixing part is elongated, if the connection of the second fixing part to the side part by the second positioning bolt is released when operating the first fixing part, the swing of the first fixing part transmitted to the second fixing part via the connecting frame will position the second fixing part at a swing position corresponding to the adjustment position of the connecting frame, and the connecting frame can be fixed to the side part by the second fixing part at the adjustment position simply by operating the second positioning bolt that connects the second fixing part to the side part, without performing any special operation to swing the second fixing part to a swing position corresponding to the adjustment position of the connecting frame, and the connecting frame can be fixed to the side part by the first fixing part and the second fixing part through a simple fixing operation. In the present invention, It is preferable that the first fixing portion is provided in the right-hand side area, and the second fixing portion is provided in the right-hand side area. According to this configuration, the effort required to operate the first fixing part, which performs positioning by selecting a first positioning hole to which a first positioning bolt is attached from among a plurality of first positioning holes, is greater than the effort required to operate the second fixing part, which is positioned by swinging in conjunction with the first fixing part. However, by providing a drive mechanism in a portion of the sieve case on the downstream side in the sorting process transfer direction, a larger working space can be easily obtained on the side of the threshing device in the upstream region of the connecting frame than on the side of the threshing device in the downstream region of the connecting frame, and since the first fixing part is located in the upstream region of the connecting frame that is more likely to provide a larger working space, it is possible to easily fix the connecting frame to the side of the sieve case with the first fixing part and the second fixing part. In the present invention, The chaflip plate is provided with an upper fulcrum axis and a lower fulcrum axis, and is provided with a support member that is connected to the side portion while being fitted onto the upper fulcrum axis and supports the chaflip plate on the side portion in a position that allows the chaflip plate to be supported on the side portion in a manner that allows the chaflip plate to be changed in position, and the connecting frame is connected to the chaflip plate while being fitted onto the lower fulcrum axis, and it is preferable that the thickness of the support member in the direction along the axis of the upper fulcrum axis is thicker than the thickness of the connecting frame in the direction along the axis of the lower fulcrum axis.

[0017] According to this configuration, the upper fulcrum shaft is firmly supported by the support member so that it is less likely to rattle, making the connecting plate less likely to swing, which makes it less likely for rattle to occur between the chaflip plate and the connecting plate, and makes it less likely for the connecting frame or chaflip plate to wear out. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is an overall side view of a combine harvester. [Figure 2] FIG. 1 is an overall plan view of a combine harvester. [Figure 3] FIG. [Figure 4] FIG. 2 is a longitudinal rear view of the upper part of the threshing device. [Figure 5] This is a side view of the area of ​​the sorting section where the chaff sieve, No. 1 recovery section, and No. 2 recovery section are located. [Figure 6] FIG. 1 is a longitudinal side view of a chaff sieve. [Figure 7] FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. 5. [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 5. [Figure 9] 9 is a cross-sectional view taken along line IX-IX in FIG. 5. [Figure 10] XX cross-sectional view of FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment of a threshing device according to the present invention will be described with reference to the drawings, in which the threshing device is applied to a full-type combine harvester.

[0020] [Overall structure] 1 and 2 show a conventional combine harvester for harvesting crops such as rice and wheat. This combine harvester has a traveling body V equipped with a pair of left and right crawler-type traveling devices 2 attached to the lower part of a machine frame 1. A reaping and transporting unit 3, which reaps planted stalks as the crop to be harvested and transports them rearward, is connected to the front of the traveling body V in a manner that allows it to be raised and lowered and swingable. The traveling body V is further equipped on the machine frame 1 with a threshing device 4 that threshers the harvested stalks transported from the reaping and transporting unit 3 and separates the threshed material into grain and straw, a grain tank 5 that stores the grain obtained by the threshing device 4, a grain discharge device 6 that discharges the grain stored in the grain tank 5 outside the machine, and a driving unit 7 that an operator rides on to operate the combine harvester. This combine is configured as a whole-culm input type that cuts the base of planted culms, harvests them, and then feeds all of the harvested culms into a threshing device 4.

[0021] The driving unit 7 is located on the right side of the front of the machine body, and the grain tank 5 is provided behind the driving unit 7. Furthermore, the threshing device 4 is located on the left side, and the grain tank 5 is located on the right side, with the threshing device 4 and the grain tank 5 lined up in the left-right direction. And, below the driving unit 7, an engine 8 for driving the machine is provided.

[0022] In this embodiment, the longitudinal direction of the machine body is defined along the direction of travel of the machine body in the working state, and the left-right direction of the machine body is defined as viewed from the direction of travel of the machine body. That is, the direction indicated by the symbol (F) in Figures 1 and 2 is the front side of the machine body, and the direction indicated by the symbol (B) in Figures 1 and 2 is the rear side of the machine body. The direction indicated by the symbol (L) in Figure 2 is the left side of the machine body, and the direction indicated by the symbol (R) in Figure 2 is the right side of the machine body. Therefore, the left-right direction of the machine body corresponds to the width direction of the machine body.

[0023] The harvesting and conveying section 3 is equipped with a harvesting processing section 9 that harvests the planted stalks as the machine moves, and a feeder 10 that conveys the harvested stalks harvested by the harvesting processing section 9 toward the threshing device 4 at the rear of the machine, and is supported so that it can be raised and lowered freely and swingably around the horizontal axis P1 by the extension and contraction of a hydraulic cylinder 11 for raising and lowering the harvester, which is installed across the machine frame 1 and the feeder 10.

[0024] The harvesting processing unit 9 is equipped with a harvesting frame 12 as a framework that supports the entire harvesting processing unit 9, a pair of left and right dividers 13 that separate the planted grain culms to be harvested from those to be not, a rotating reel 14 that rakes the planted grain culms to be harvested rearward, a clipper-shaped cutting blade 15 that cuts and harvests the base side of the planted grain culms to be harvested, and an auger 16 that sends the cut harvested grain culms laterally to the middle side in the left-right direction, gathers them up, and sends them rearward.

[0025] [Threshing equipment] As shown in Figure 2, the threshing device 4 is disposed on the left side of the grain tank 5. As shown in Figures 3 and 4, the threshing device 4 is composed of side walls 24, 25 located on both the left and right sides, a front wall 26 located at the front end, and a rear wall 27 located at the rear end, and is equipped with a device main body 20 with an open top and a top plate 21 covering the top of the device main body 20. As shown in Figures 1 and 2, the threshing device 4 is equipped with a threshing device cover 76 that covers the device main body 20 from the outside on the left side. 1, the threshing device cover 76 is divided into a first divided cover 76a located at the upper front of the threshing device cover 76, a second divided cover 76b located behind the first divided cover 76a, a third divided cover 76c located below the front of the first divided cover 76a and the second divided cover 76b, and a fourth divided cover 76d located behind the third divided cover 76c and below the second divided cover 76b. The first divided cover 76a, the second divided cover 76b, the third divided cover 76c, and the fourth divided cover 76d are configured to be able to be opened and closed by being attached and detached individually.

[0026] As shown in FIG. 3, the threshing device 4 includes a threshing section 4A provided at the top of the threshing device 4 and a sorting section 4B provided at the bottom of the threshing device 4.

[0027] [Threshing Department] As shown in Figure 3, the threshing section 4A has a threshing chamber 28 formed in the upper part of the internal space of the device main body 20. The threshing chamber 28 is provided with a threshing drum 22 that is driven to rotate about a horizontal axis X1 facing the front and rear of the machine body to thresh crops. The threshing drum 22 has a threshing drum shaft 31 that is supported rotatably about the horizontal axis X1 across the front wall portion 26 and the rear wall portion 27, and is configured to rotate integrally about the threshing drum shaft 31. The threshing drum shaft 31 is driven to rotate by power from the engine 8. The threshing drum 22 is driven to rotate in a right-handed direction (clockwise, the direction of rotation indicated by arrow K in Figure 4) when viewed from the front of the machine body.

[0028] 3, the threshing drum 22 has a sweeping section 22A provided at the front of the threshing drum 22, and a threshing processing section 22B provided behind the sweeping section 22A. The rear of the sweeping section 22A is connected to the front of the threshing processing section 22B. The threshing processing section 22B has a plurality of support plates 32 formed in a disk shape and connected and fixed to the threshing drum shaft 31 so as to be integrally rotatable, a plurality of support rods 33 distributed at equal intervals around the circumferential direction of the threshing drum 22 and connected to each of the support plates 32, and bar-shaped threshing teeth 34 protruding from a plurality of positions aligned in the axial direction of each support rod 33 toward the outer periphery of the threshing drum 22.

[0029] An arc-shaped receiving net 23 is provided below the threshing drum 22. Although not described in detail, the receiving net 23 is made up of a mesh-like body of known structure, in which a large number of arc-shaped horizontal bars are connected to vertical bars along the axial direction that connect the horizontal bars, and a large number of through holes are formed for the grains to pass through.

[0030] The handling chamber 28 is formed by the side walls 24, 25, front wall 26, and rear wall 27 of the device body 20, the top plate 21 that covers the top of the device body 20, and the receiving net 23. On the inner surface of the top plate 21, there is provided a dust transfer valve 35 that transfers and guides the treated material toward the rear of the machine along the rotation axis of the handling drum 22 as the handling drum 22 rotates.

[0031] In the threshing section 4A, the entire harvested stalks, from the base to the tip, are fed into the threshing chamber 28 by the feeder 10 through a supply port 30 located at the front end of the threshing chamber 28. The fed harvested stalks are then raked into the threshing chamber 28 by the sweeping section 22A and threshed by the threshing section 22B and the receiving net 23. The threshed material is given a rotational force by the rotating threshing section 22B, hits the dust discharge valve 35, and is guided by the dust discharge valve 35 to flow toward the rear of the threshing chamber 28. The threshed material is threshed while being transported toward the rear of the threshing chamber 28 by the threshing section 22B. Grains obtained through the threshing process leak through the receiving net 23. The threshed stalks and broken straw generated during the threshing process are discharged to the outside of the threshing chamber 28 through a stalk discharge section 29 located at the rear end of the threshing chamber 28.

[0032] [Reception net] 3 and 4, the receiving net 23 is divided into six divided receiving net bodies 23a at dividing points Z1 located at two places in the front-to-rear direction of the handling drum 22 and at dividing point Z2 located at one place in the circumferential direction of the handling drum 22. The six divided receiving net bodies 23a have the same length in the front-to-rear direction of the handling drum, the same length in the circumferential direction of the handling drum, and the same shape.

[0033] As shown in Figure 4, an opening / closing axis X2 is provided at one of the two lateral ends of the top plate 21, and a bolt 19 with an operating tool is provided at the other lateral end of the top plate 21. This bolt 19 is connected to a spacer member 20a provided on the device body 20 to secure the top plate 21 in a closed position. By loosening the bolt 19 with an operating tool to release the closed position of the top plate 21, the top plate 21 can be swung upward around the opening / closing axis X2 as a swing fulcrum to open the position. This allows each of the six divided mesh bodies 23a to be removed from the handling chamber 28 to the top of the device body 20 through the top opening of the device body 20, or to be installed into the handling chamber 28 from above the device body 20 through the top opening of the device body 20. The assembly positions of the six divided mesh bodies 23a in the handling chamber 28 can be swapped (rotated). For example, among three divided receiving mesh bodies 23a lined up along the front-to-back direction of the handling drum 22, the divided receiving mesh body 23a located at the front most and most susceptible to wear can be moved to the second assembly position from the front and assembled, the divided receiving mesh body 23a located at the second assembly position from the front can be moved to the third assembly position from the front and assembled, and the divided receiving mesh body 23a located at the third assembly position from the front can be moved to the frontmost assembly position and assembled.

[0034] [Sorting Department] As shown in Figure 3, the sorting section 4B is equipped with a oscillating sorting device 36 that receives the processed material that has leaked downward from the receiving net 23 as sorted material and sorts the received sorted material while transporting it toward the rear of the threshing device, a first recovery section 37 that recovers grains that have leaked from the oscillating sorting device 36 as first processed material, a second recovery section 38 that recovers second processed material such as grains with branches that have leaked from the oscillating sorting device 36, and a winnower 39 that supplies sorting air to the oscillating sorting device 36.

[0035] The first collection section 37 is configured to transport the collected grains to the outside of the threshing device 4 by a lateral feed screw 37a. After being transported to the outside of the threshing device 4, the grains collected by the first collection section 37 are transported upward by a grain transport device 40 (see Figure 2) and stored in the grain tank 5.

[0036] The second collection section 38 is configured to transport the collected second processed material to the outside of the threshing device 4 by a cross-feed screw 38a. After being transported to the outside of the threshing device 4, the second processed material collected in the second collection section 38 is returned into the threshing chamber 28 by a second material return device 41 (see Figure 2) and threshed.

[0037] As shown in Figure 3, the oscillating sorting device 36 has a sieve case 42 that is a rectangular frame in plan view and is provided below the receiving net 23. Inside the sieve case 42, a first grain pan 43, a second grain pan 44, a sieve wire 45, a chaff sieve 46, a grain sieve 47, a straw rack 48, etc. are provided.

[0038] The sieve case 42 is provided with guide rollers 49 on the left and right outer sides of the front of the machine body, and the left and right side walls 24, 25 of the threshing device 4 are provided with sliding guide portions (not shown) that slidably guide the guide rollers 49. A crank-type swing drive portion 52 is provided at the bottom of the sieve case 42 at the rear of the threshing device. Operation of the swing drive portion 52 drives the sieve case 42 at the rear of the threshing device so that it moves in a circular motion. Therefore, the entire sieve case 42 performs a back-and-forth swing motion that includes a vertical component.

[0039] As shown in Figure 3, the first grain pan 43 is composed of a plate body formed into an approximately wave-shaped shape when viewed from the side, and is provided at the upstream end (front end) of the oscillating sorting device 36 in the direction of transport of the sorted material, and transports the material that has leaked from the upstream side in the transport direction of the threshed material in the handling chamber 28 to the rear.

[0040] The sieve wire 45 is made of piano wire or the like and extends in a cantilevered manner from the end on the downstream side of the first grain pan 43 in the direction of transport toward the downstream side of the direction of transport, transporting the sorted material sent out from the first grain pan 43 backward while allowing the grains and second-stage processed material to leak downward.

[0041] The second grain pan 44, like the first grain pan 43, is composed of a plate body formed in an approximately corrugated shape when viewed from the side, and is located downstream and below the first grain pan 43 in the transport direction, and transports processed material that has leaked from the downstream side of the first grain pan 43 in the transport direction and processed material that has leaked from the sieve wire 45 rearward.

[0042] The chaff sieve 46 is located downstream of the second grain pan 44 in the direction of sorted material transport, and swings and transports sorted material sent out from the second grain pan 44, sorted material that has leaked from the sieve wire 45, and processed material that has leaked from the receiving net 23 in the handling chamber 28 toward the rear of the sieve case 42, allowing the grains and second processed material to leak downward.

[0043] The grain sieve 47 is made of a crimped mesh with many openings for grain passage, and is located below the chaff sieve 46 and is supported by a front support member 60 and a rear support member 61 that are supported across the left and right side portions 42A of the sieve case 42. The grain sieve 47 swings and transports the processed material that has leaked from the chaff sieve 46, causing the grain to leak down to the first collection section 37 below, and transports the second processed material to the second collection section 38 downstream in the transport direction.

[0044] The straw rack 48 is provided downstream in the transfer direction of the chaff sieve 46. Each straw rack 48 has a rack support 62 that is spanned across the left and right side portions 42A of the sieve case 42, and a plurality of transfer rack plates 63 are fixedly extended rearward in a cantilevered manner from the rack support 62 at intervals in the left-right direction. The transfer rack plates 63 are made of a sawtooth plate that can receive the material to be processed and swingably transfer it rearward.

[0045] The straw rack 48 swings rearward to transport the processed material supplied from the end of the transport direction of the handling chamber 28 or the end of the chaff sieve 46, causing the second processed material to leak into the second recovery section 38 below, and discharging the processed material such as waste straw that does not leak out to the outside through the dust discharge port 65 at the rear.

[0046] As shown in Figure 3, the chaff sieve 46 and straw rack 48 are arranged close to each other along the transport direction, and the gap between the end of the chaff sieve 46 in the transport direction and the start of the straw rack 48 in the transport direction is small, making it difficult for scraps of straw to fall through the gap into the second collection section 38 below. With this configuration, when harvesting a crop that requires a large amount of threshing, such as Indica rice, it is possible to prevent a large amount of scraps from falling through the gap between the chaff sieve 46 and the straw rack 48, clogging the second waste reduction device 41, or preventing the scraps from circulating between the handling chamber 28 and the second collection section 38 and not being discharged outside. The scraps are transported rearward by the straw rack 48 and discharged through the dust outlet 65.

[0047] 3, a flow-down guide member 66 is provided at the rear of the second collection section 38 to guide the second processed material leaking from the chaff sieve 46 or straw rack 48 into the second collection section 38. Although not shown, this flow-down guide member 66 has a two-layer structure consisting of a soft sheet-like body made of a soft resin material that is easily displaced along the inclined guide surface 67 of the second collection section 38, and a hard sheet-like body made of a harder material that is resistant to wear. The hard sheet-like body is thin and located on the lower side in contact with the inclined guide surface 67 of the second collection section 38, while the soft sheet-like body is thicker and located on the upper side.

[0048] [Chaff Thieves] As shown in FIGS. 3 and 6, the chaff sieve 46 includes a plurality of strip-shaped chaff flip plates 50 arranged at intervals along the direction in which the material to be sorted is transported (the front-rear direction of the threshing apparatus).

[0049] Each chaff flip plate 50 is supported on the sieve case 42 in a positionally adjustable manner. Specifically, as shown in FIGS. 6, 7, 8, and 9, an upper fulcrum shaft 54 ​​is provided on the upper portion of the chaff flip plate 50 at the left lateral end side of the chaff flip plate 50, and the upper fulcrum shaft 54 ​​is supported on the left side portion 42A of the sieve case 42. The upper fulcrum shaft 54 ​​is supported on the side portion 42A by fitting a long support member 55 extending in the direction along the sorting material transport direction of the chaff sieve 46 (the front-to-rear direction of the threshing device) onto the upper fulcrum shaft 54, and connecting members 56 attached to multiple points in the front-to-rear direction of the support member 55 are connected to the side portion 42A with connecting bolts 57. The connecting members 56 are attached to the support member 55 by welding. Of the multiple chaff flip plates 50, all chaff flip plates 50 except the first chaff flip plate 50a and the second chaff flip plate 50b are fitted with a retaining plate 58 and a retaining pin 59 attached to the upper fulcrum shaft 54 ​​to prevent the support member 55 from coming off. A long connecting frame 70 is connected to the lower part of the chaff flip plate 50 in the direction along the sorting material transport direction of the chaff sieve 46 (the front-to-rear direction of the threshing device). The multiple chaff flip plates 50 are interlocked and connected by the connecting frame 70. The connecting frame 70 is connected to the chaff flip plates 50 by fitting the connecting frame 70 onto a lower fulcrum shaft 71 provided at the lower part of the chaff flip plate 50. A thickness 55W of the support member 55 in the direction along the axis Y of the upper fulcrum shaft 54 ​​is thicker than a thickness 70W of the connecting frame 70 in the direction along the axis Q of the lower fulcrum shaft 71. 7 and 8, among the plurality of chaflip plates 50, the first chaflip plate 50a and the second chaflip plate 50b have reinforcing parts 72 attached to the connecting frame 70. In some of the plurality of chaflip plates 50, a retaining plate 74 and a retaining pin 73 are attached to the lower fulcrum shaft 71 to prevent the connecting frame 70 from coming off.

[0050] Although the support structure and interlocking structure at the right side of the chaflip plate 50 are not shown, the right side of the chaflip plate 50 is also supported on the right side 42A of the sheave case 42 based on a support structure having the same configuration as the support structure at the left side, and is interlocked and connected by an interlocking structure having the same configuration as the interlocking structure at the left side. That is, the right side of the chaflip plate 50 is also provided with an upper fulcrum shaft 54 ​​and a lower fulcrum shaft 71, and the upper fulcrum shaft 54 ​​is supported on the right side 42A of the sheave case 42 via a support member 55 and a connecting member 56. A connecting frame 70 is connected to the lower fulcrum shaft 71.

[0051] Each chaff flip plate 50 is supported by the sieve case 42 in a state in which its position can be changed relative to the sieve case 42 by swinging around the axis Y of the upper fulcrum shaft 54 ​​as a swing fulcrum. The position of the multiple chaff flip plates 50 is changed relative to the sieve case 42 in conjunction with the connecting frame 70 as the connecting frame 70 is moved forward and backward. By adjusting the position of the multiple chaff flip plates 50 relative to the sieve case 42, the opening between the chaff flip plates 50, i.e., the size of the material leakage hole that allows the sorted material from the chaff sieve 46 to leak, can be adjusted.

[0052] [First fixed part, second fixed part] The chaff sieve 46 is provided with a plurality of fixing portions 80 which adjust the position of the connecting frame 70 and fix the connecting frame 70 to the sieve case 42 in the adjusted position, and which are positioned dispersedly in the direction along the sorting process material transport direction of the chaff sieve 46. In this embodiment, the fixing portions 80 are provided in an upstream region of the connecting frame 70 which is located upstream of a central point 70C in the sorting process material transport direction of the chaff sieve 46, and in a downstream region of the connecting frame 70 which is located downstream of the central point 70C in the sorting process material transport direction.

[0053] In this embodiment, as shown in Figures 3 and 6, two fixing portions 80 are provided. The two fixing portions 80 are provided in an upstream region of the connecting frame 70 and a downstream region of the connecting frame 70. In this embodiment, of the two fixing portions 80, a first fixing portion 80A located in the upstream region of the connecting frame 70 is provided at a location above a portion between the first collecting portion 37 and the second collecting portion 38 in the sorting process material transport direction of the chaff sieve 46. Of the two fixing portions 80, a second fixing portion 80B located in the downstream region of the connecting frame 70 is provided at a location above the second collecting portion 38.

[0054] As shown in Figures 5 and 8, the first fixing portion 80A includes a first fixing member 81 provided on the outside of the left side portion 42A of the sheave case 42, a lower fulcrum axis 71 of the first chaflip plate 50a, one of the multiple chaflip plates 50, and a first positioning bolt 85.

[0055] As shown in Figures 5 and 8, the first fixing member 81 is supported by a support shaft 82 provided on the left side 42A of the sheave case 42, and is supported on the side 42A in a state in which it can swing around the axis Y1 of the support shaft 82 as a swing fulcrum. The first fixing portion 80A is supported on the side 42A in a state in which it can swing around the axis Y1 as a swing fulcrum. The axis Y1 of the support shaft 82 is located on the same axis as the axis Y of the upper fulcrum shaft 54 ​​of the first chafing plate 50a. A retaining plate 83 and a screw hole member 82a that prevent the first fixing member 81 from coming off are attached to the support shaft 82. The lower fulcrum shaft 71 interlocks and connects the lower part of the first chafing plate 50a and the free end side of the first fixing member 81. The lower fulcrum shaft 71 is inserted through an arc-shaped elongated hole 84 provided in the side portion 42A in a manner that allows it to move around the axis Y1.

[0056] 5, the first fixing member 81 is provided with a plurality of through-hole-shaped first positioning holes 86 through which the first positioning bolts 85 pass but which the first positioning bolts 85 do not engage, and the side portion 42A is provided with a plurality of threaded first fixing holes 87 into which the first positioning bolts 85 can be engaged and disengaged. The first positioning bolt 85 is attached to a selected one of the plurality of first positioning holes 86 so as to pass through the selected one. When the first positioning bolt 85 engages with a corresponding one of the plurality of first fixing holes 87, the first fixing portion 80A is locked to the side portion 42A. When the first positioning bolt 85 is removed from the first fixing hole 87 and the first positioning hole 86, the first fixing portion 80A is unlocked to allow swinging.

[0057] In the first fixing portion 80A, the first positioning bolt 85 is set to an unlocked state and the first fixing member 81 is swung through an operating opening 88 (see FIG. 3) provided in the left side wall 25 of the device body 20 in an openable and closable manner. The lower fulcrum shaft 71 is then swung by the first fixing member 81 around the axis Y1 as a swing fulcrum, and the connecting frame 70 is repositioned in the front-to-rear direction of the threshing device by the lower fulcrum shaft 71. As shown in FIGS. 5 and 8, one first positioning hole 86 selected from the plurality of first positioning holes 86 is aligned with one first fixing hole 87 among the plurality of first fixing holes 87. In this state, the first positioning bolt 85 is attached to the selected first positioning hole 86 and engaged with the first fixing hole 87 aligned with the first positioning hole 86. Then, the first fixing member 81 is fixed to the side portion 42A by the first positioning bolt 85, the first fixing portion 80A is positioned at a swing position corresponding to the adjustment position of the connecting frame 70 as the target adjustment position, the connecting frame 70 is adjusted to the adjustment position of the target adjustment by the first fixing portion 80A, and the connecting frame 70 is fixed to the side portion 42A by the first fixing portion 80A (lower fulcrum shaft 71, first fixing member 81 and first positioning bolt 85) at the adjusted adjustment position.

[0058] As shown in Figures 5, 9, and 10, the second fixing portion 80B includes a second fixing member 91 provided on the outside of the left side portion 42A of the sheave case 42, a lower fulcrum axis 71 of the second chaflip plate 50b, one of the multiple chaflip plates 50, and a second positioning bolt 97.

[0059] The second fixing member 91 is supported by a support shaft 92 provided on the left side 42A of the sheave case 42, and is supported on the side 42A in a state in which it can swing around the axis Y2 of the support shaft 92 as a swing fulcrum. The second fixing portion 80B is supported on the side 42A in a state in which it can swing around the axis Y2 as a swing fulcrum. The axis Y2 of the support shaft 92 is located on the same axis as the axis Y of the upper fulcrum shaft 54 ​​of the second chaflip plate 50b. A retaining plate 93 and a screw hole member 92a that prevent the second fixing member 91 from coming off are attached to the support shaft 92. The lower fulcrum shaft 71 interlocks and connects the lower part of the second chaflip plate 50b and the free end side of the second fixing member 91. The lower fulcrum shaft 71 is inserted through an arc-shaped slot 94 provided in the side portion 42A in a manner that allows it to move around the axis Y2.

[0060] 5 and 10, the second fixing member 91 is provided with a second positioning hole 95 having an elongated arc-shaped hole centered on the axis Y2, and a second fixing hole 96 having a threaded hole is provided in the left side portion 42A of the sheave case 42. The second positioning bolt 97 is inserted through the second positioning hole 95 and attached to the second positioning hole 95, and is then tightened into the second fixing hole 96, thereby locking the second fixing portion 80B to the side portion 42A and fixing it. When the second positioning bolt 97 is loosened from being tightened into the second fixing hole 96, the second positioning bolt 97 is released from the second fixing hole 96, thereby unlocking the second fixing portion 80B from being fixed to the side portion 42A and allowing the second fixing portion 80B to swing.

[0061] In the second fixing portion 80B, when adjusting the position of the connecting frame 70 using the first fixing portion 80A, the second positioning bolt 97 is unlocked via the operation opening 88. Then, when the position of the connecting frame 70 is changed by the first fixing portion 80A, the swing of the first fixing portion 80A is transmitted to the lower fulcrum shaft 71 via the connecting frame 70, and the second fixing portion 80B is operated to swing around the axis Y2 as the swing fulcrum. When the first fixing portion 80A is fixed to the side portion 42A, the second positioning bolt 97 is locked. Then, the second fixing portion 80B is positioned at a swing position corresponding to the adjustment position of the connecting frame 70 adjusted by the first fixing portion 80A, and the connecting frame 70 is adjusted to the adjustment target position by the second fixing portion 80b, and the connecting frame 70 is fixed to the side portion 42A at the adjustment target adjustment position by the second fixing portion 80B (lower fulcrum shaft 71, second fixing member 91 and second positioning bolt 97).

[0062] The size of the processing material leakage hole of the chaff sieve 46 is adjusted based on the following procedure. The fourth divided cover 76d of the threshing device cover 76 is removed to open the operation opening 88 in the left side wall 25 of the device body 20, and the second positioning bolt 97 of the second fixing part 80B is loosened through the operation opening 88 to release the second fixing part 80B from the side part 42A, and the second fixing part 80B is released from the side part 42A of the connecting frame 70. Next, the first positioning bolt 85 of the first fixing part 80A is removed through the operation opening 88 to release the first fixing part 80A from the side part 42A, and the first fixing part 80A is released from the side part 42A of the connecting frame 70, and the first fixing part 80A is swung to change the position of the connecting frame 70. When the connecting frame 70 reaches the target adjustment position, the first positioning bolt 85 is attached to the corresponding first positioning hole 86 of the first fixing portion 80A and the first fixing hole 87 of the side portion 42A to fix the first fixing portion 80A to the side portion 42A, and the upstream region of the connecting frame 70 is fixed to the side portion 42A by the first fixing portion 80A. Next, the second positioning bolt 97 of the second fixing portion 80B is tightened to fix the second fixing portion 80B to the side portion 42A, and the downstream region of the connecting frame 70 is fixed to the side portion 42A by the second fixing portion 80B.

[0063] [Another embodiment] (1) In the above embodiment, the fixing portion 80 is provided on the left side of the sheave case 42, but it may be provided on the right side.

[0064] (2) In the above embodiment, an example was shown in which two fixing portions 80 were provided, but three or more fixing portions may also be provided.

[0065] (3) In the above embodiment, an example is shown in which one fixing portion 80 is provided in each of the left and right areas of the connecting frame 70, but it is possible to provide two or more fixing portions 80 in each of the right and left areas of the connecting frame 70.

[0066] (4) In the above embodiment, an example was shown in which the first fixing portion 80A was provided in the upper region of the connecting frame 70 and the second fixing portion 80B was provided in the lower region of the connecting frame, but it would also be acceptable to provide the second fixing portion 80B in the upper region of the connecting frame 70 and the first fixing portion 80A in the lower region of the connecting frame.

[0067] (5) In the above embodiment, an example is shown in which multiple first fixing holes 87 are provided in side portion 42A, but a configuration may also be adopted in which only one first fixing hole 87 is provided in side portion 42A and each of the multiple first positioning holes 86 of first fixing member 81 (first fixing portion 80A) is aligned with one first fixing hole 87.

[0068] (6) In the above embodiment, an example is shown in which multiple first positioning holes 86 are provided in the first fixing member 81 (first fixing portion 80A) and a first fixing hole 87 is provided in the side portion 42A. However, a configuration may also be adopted in which multiple first positioning holes with which the first positioning bolt 85 can engage are provided in the side portion 42A, only one first positioning hole is provided in the first fixing member 81 (first fixing portion 80A), and the first positioning hole in the first fixing member 81 (first fixing portion 80A) is aligned with one positioning hole selected from the multiple positioning holes in the side portion 42A.

[0069] (7) In the above embodiment, an example is shown in which an elongated second positioning hole 95 is provided in the second fixing member 91 (second fixing portion 80B) and a second fixing hole 96 is provided in the side portion 42A. However, a configuration may also be adopted in which an elongated second positioning hole is provided in the side portion 42A and a positioning hole through which the second positioning bolt 97 is inserted is provided in the second fixing member 91 (second fixing portion 80B), and the second fixing member 91 (second fixing portion 80B) is tightened and fixed to the side portion 42A by the second positioning bolt 97 attached to the positioning hole of the second fixing member 91 (second fixing portion 80B) and a threaded hole member engaged with the second positioning bolt 97.

[0070] (8) In the above embodiment, an example is shown in which the thickness 55W of the support member 55 is thicker than the thickness 70W of the connecting frame 70, but this is not limited to this, and the thickness of the support member 55 may be thinner than the thickness of the connecting frame 70, or the thickness of the support member 55 and the thickness of the connecting frame 70 may be the same. [Industrial Applicability]

[0071] The present invention can be applied to a threshing device mounted on a normal type combine harvester or a head-feeding type combine harvester. [Explanation of symbols]

[0072] 4A Threshing Department 4B Sorting Department 22 Thrusting Drum 23 receiving net 28 Handling room 37 Recovery Section No. 1 38 Recovery Section No. 2 42 Sieve Case 42A Side 46 Chaff Seeb 50 Chaflip Board 54 Upper fulcrum shaft 55 Support member 70 Connecting Frame 71 Lower fulcrum shaft 70C central location 80 Fixed part 80A 1st fixed part 80B 2nd fixed part 85 First positioning bolt 86 First positioning hole 95 Second positioning hole 97 Second positioning bolt Y-axis center (upper fulcrum axis) Q axis center (lower fulcrum axis)

Claims

1. A threshing unit having a threshing chamber to which harvested crops are supplied, a threshing drum rotatably provided in the threshing chamber to thresh and process the supplied crops, and a receiving net provided below the threshing drum; A sieve case is provided below the receiving net so as to be able to swing, and a sorting unit is provided which is supported by the sieve case and has a chaff sieve which receives the threshed material that has fallen through the receiving net as a sorted material, and sorts the received sorted material, The chaff sieve is provided with a plurality of chaff flip plates that are aligned at intervals along the sorting processing material transfer direction of the chaff sieve and are supported by the sieve case in a posture-changeable state, and a connecting frame that connects the plurality of chaff flip plates; The plurality of chaflip plates are configured to change their postures by adjusting the movement of the connecting frame, A plurality of fixing portions are provided to fix the connection frame to the side of the sheave case at an adjusted position, the plurality of fixing portions are dispersed in a direction along the sorting processing material transport direction and are supported swingably on the side portions, a first fixing portion of the plurality of fixing portions is configured to be positioned at a swing position corresponding to the adjustment position of the connecting frame by a plurality of first positioning holes provided in the first fixing portion and one of the side portions while being positioned corresponding to each of the plurality of adjustment positions of the connecting frame, and a first positioning bolt attached to a first positioning hole selected from the plurality of first positioning holes and connecting the first fixing portion to the side portion, A threshing device in which a second fixing portion of the plurality of fixing portions is configured to be positioned at a swing position corresponding to the adjustment position of the connecting frame by a second positioning hole having an elongated hole formed in one of the second fixing portion and the side portion, and a second positioning bolt attached to the second positioning hole and connecting the second fixing portion to the side portion.

2. The threshing device described in claim 1, wherein the fixing portions are provided in an upstream region of the connecting frame located upstream of the central point in the sorting material transport direction, and in a downstream region of the connecting frame located downstream of the central point in the sorting material transport direction.

3. the first fixing portion is provided in the right-side region, A threshing device as described in claim 2, wherein the second fixing portion is provided in the downside region.

4. a first recovery section for recovering the first processed material separated by the chaff sieve; a second recovery section provided downstream of the first recovery section in the sorting treatment material transfer direction and recovering the second treatment material sorted by the chaff sieve; the first fixing portion is provided above a portion between the first recovery portion and the second recovery portion in the sorting treatment material transfer direction, A threshing device as described in claim 3, wherein the second fixing portion is provided above the second collecting portion.

5. A threshing unit having a threshing chamber to which harvested crops are supplied, a threshing drum rotatably provided in the threshing chamber to thresh and process the supplied crops, and a receiving net provided below the threshing drum; A sieve case is provided below the receiving net so as to be able to swing, and a sorting unit is provided which is supported by the sieve case and has a chaff sieve which receives the threshed material that has fallen through the receiving net as a sorted material, and sorts the received sorted material, The chaff sieve is provided with a plurality of chaff flip plates that are aligned at intervals along the sorting processing material transfer direction of the chaff sieve and are supported by the sieve case in a posture-changeable state, and a connecting frame that connects the plurality of chaff flip plates; The plurality of chaflip plates are configured to change their postures by adjusting the movement of the connecting frame, A plurality of fixing portions are provided to fix the connection frame to the side of the sheave case at an adjusted position, The plurality of fixing portions are distributed in a direction along the sorting processing material transport direction, a first recovery section for recovering the first processed material separated by the chaff sieve; a second recovery section provided downstream of the first recovery section in the sorting treatment material transfer direction and recovering the second treatment material sorted by the chaff sieve; The fixing unit is provided above a location between the first recovery unit and the second recovery unit in the sorting process material transfer direction, A threshing device in which the fixed part is provided above the second collection part.

6. A threshing device as described in Claim 5, wherein the fixing parts are provided in an upside region of the connecting frame located on the upside of the central point in the sorted material transport direction in the sorted material transport direction, and in a downside region of the connecting frame located on the downside of the central point in the sorted material transport direction.

7. Each of the fixed portion located in the up-hand region and the fixed portion located in the down-hand region is supported swingably on the side portion, a first fixing portion, which is one of the fixing portion located in the upright region and the fixing portion located in the downright region, is configured to be positioned at a swing position corresponding to the adjustment position of the connecting frame by a plurality of first positioning holes provided in the first fixing portion or one of the side portions while being positioned corresponding to each of the plurality of adjustment positions of the connecting frame, and a first positioning bolt attached to a first positioning hole selected from the plurality of first positioning holes and connecting the first fixing portion to the side portion; The threshing device described in claim 6, wherein the other second fixing portion of the fixing portion located in the upstream region and the fixing portion located in the downstream region is configured to be positioned at a swing position corresponding to the adjustment position of the connecting frame by a second oblong positioning hole provided in one of the second fixing portion and the side portion, and a second positioning bolt attached to the second positioning hole and connecting the second fixing portion to the side portion.

8. The first fixing portion is provided in the right side area, A threshing device as described in claim 7, wherein the second fixing portion is provided in the downside region.

9. The chaflip plate is provided with an upper fulcrum shaft and a lower fulcrum shaft, A support member is provided which is fitted onto the upper support shaft and connected to the side portion, and supports the chaflip plate on the side portion so that the position of the chaflip plate can be changed. The connecting frame is connected to the chaflip plate in a state where it is fitted onto the lower support shaft, A threshing device as described in any one of claims 1 to 8, wherein the thickness of the support member in a direction along the axis of the upper fulcrum shaft is thicker than the thickness of the connecting frame in a direction along the axis of the lower fulcrum shaft.

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