WO2023204185A1

WO2023204185A1 - Threshing device

Info

Publication number: WO2023204185A1
Application number: PCT/JP2023/015353
Authority: WO
Inventors: 小林宜泰; 青山祐也
Original assignee: 株式会社クボタ
Priority date: 2022-04-20
Filing date: 2023-04-17
Publication date: 2023-10-26
Also published as: JP2023159711A

Abstract

This threshing device comprises a plurality of fixing parts (80) for fixing a connection frame (70) to a side part (42A) of a sieve case (42) at an adjusted position. The plurality of fixing parts (80) is dispersed in the direction along a sorted product transporting direction of a chaff sieve (46).

Description

threshing equipment

The present invention is provided with a threshing section and a sorting section, and the threshing section includes a handling chamber into which harvested crops are supplied, and a handling cylinder which is rotatably provided in the handling chamber and handles and processes the supplied crops. and a receiving net provided below the handling barrel, and the sorting section is supported by a sheave case provided swingably below the receiving net, and the sheave case, The present invention relates to a threshing device having a chaff sieve that receives the threshed material leaking from the receiving net as the sorted material, and a chaff sieve for sorting the received sorted material.

In the above-mentioned threshing device, as shown in Patent Document 1, for example, a chaff sheave, a plurality of chaflip plates (sorting plates) supported by a sheave case, and a connection frame (support frame) that connects the plurality of chaflip plates. , the plurality of chaflip plates are arranged at intervals along the transfer direction of the sorted material of the chaff sieve, and the posture can be changed, and the plurality of chaflip plates are arranged according to the position of the connecting frame. Some devices are configured to change posture by adjustment.

Patent No. 5400566

Conventionally, when the sheave case is rocked and swung, the connecting frame swings and twisting occurs between the connecting frame and the chaflip plate, making the connecting frame or the chaflip plate liable to wear out.

An object of the present invention is to provide a threshing device that can improve the durability of the connection frame and the chaflip plate.

The threshing device according to the present invention includes:
A threshing section and a sorting section are provided, and the threshing section includes a handling chamber into which harvested crops are supplied, a handling cylinder which is rotatably provided in the handling chamber and handles and processes the supplied crops, and a handling cylinder which handles and processes the supplied crops. a receiving net provided below the trunk, and the sorting section is supported by the sheave case and is supported by the sheave case and is provided swingably below the receiving net. It has a chaff sieve that receives the leaked threshed material as a sorted material and also sorts the received sorted material, and the chaff sieve has a plurality of chaff flip plates supported by the sieve case; a connecting frame that connects the plurality of chaff flip plates, the plurality of chaff flip plates are arranged at intervals along the transfer direction of the sorted material of the chaff sieve, and are capable of changing their postures. The plurality of chaflip plates are configured to change their posture by adjusting the position of the connecting frame, and the plurality of chaflip plates include a plurality of fixing parts that fix the connecting frame to the side of the sheave case at the adjusted adjustment position. is provided, and the plurality of fixing parts are distributed in a direction along the transfer direction of the sorted material.

According to this configuration, a plurality of portions of the connection frame that are distributed and located along the transfer direction of the sorted material of the chaff sieve are fixed to the side of the sieve case by the fixing portion. Therefore, the connecting frame does not swing easily regardless of the swinging of the sheave case, and the connecting frame and chaflip plate are less likely to be twisted, and the connecting frame or chaflip plate is less likely to wear out. can improve the durability of

In the present invention,
The fixing portion includes an upper region of the connecting frame located on the upper side in the sorted material transfer direction with respect to a central location in the sorting material transfer direction, and an upper region of the connecting frame located on the upper side in the sorted material transfer direction It is preferable to provide each of the lower side regions located on the lower side in the sorted material transfer direction with respect to the location.

According to this configuration, compared to the case where the connecting frame is fixed to the side at only one place, the upper end of the connecting frame in the direction of transporting the sorted material from the point fixed to the side in the upper side area. , and the length of the portion of the connecting frame from the location fixed to the side in the downstream area to the downstream end in the sorted material transfer direction. Therefore, regardless of the swinging of the sheave case, the connecting frame is less likely to swing and twisting between the connecting frame and the chaflip plate is less likely to occur, thereby improving the durability of the connecting frame and chaflip plate.

In the present invention,
The fixing part located in the upper region and the fixing part located in the lower region are each swingably supported by the side part, and each of the fixing part located in the upper region and the fixing part located in the lower region The first fixing part, which is one of the fixing parts located in the area, has a plurality of first positioning holes provided in one of the first fixing part and the side part, and a plurality of first positioning holes. a first positioning bolt that is attached to any one of the first positioning holes selected from the holes and connects the first fixing part to the side part; and a first positioning bolt that is attached to any one of the first positioning holes selected from among the holes, and a first positioning bolt that connects the first fixing part to the side part. The plurality of first positioning holes are located corresponding to the plurality of adjustment positions of the connection frame, and the fixing part located in the upper region and The second fixing part, which is the other of the fixing parts located in the lower side region, includes a second positioning hole in the form of an elongated hole provided in one of the second fixing part and the side part; a second positioning bolt attached to the second positioning hole and connecting the second fixing part to the side part, the connecting frame is positioned at a swing position corresponding to the adjustment position; It is preferable to have one.

According to this configuration, the first fixing portion is swung relative to the side portion to be located at a swiveling position corresponding to the adjustment position of the connection frame, and the first positioning hole selected from the plurality of first positioning holes By attaching the positioning bolt and connecting the first fixing part to the side part, the first fixing part becomes active and the connecting frame is fixed to the side part by the first fixing part. Since the second positioning hole of the second fixing part is an elongated hole, when operating the first fixing part, if the connection of the second fixing part to the side part by the second positioning bolt is released, the connecting frame The swinging motion of the first fixing part is transmitted to the second fixing part through the second fixing part, so that the second fixing part is located at a swing position corresponding to the adjustment position of the connection frame. Therefore, there is no need to perform any special operation to move the second fixed part to the swing position corresponding to the adjustment position of the connecting frame, just operate the second positioning bolt that connects the second fixed part to the side part. Then, the connecting frame is fixed to the side by the second fixing part in the adjusted position. Thereby, the connection frame can be fixed to the side part by the first fixing part and the second fixing part by a simple fixing operation.

In the present invention,
Preferably, the first fixing part is provided in the upper region, and the second fixing part is provided in the lower region.

According to this configuration, the effort required to operate the first fixing part that performs positioning by selecting the first positioning hole to which the first positioning bolt is attached from a plurality of first positioning holes can be reduced by the movement of the first fixing part that is linked to the first fixing part. This requires more effort than is required to operate the second fixing portion, which is positioned by motion. However, due to the drive mechanism being provided in the lower part of the sieve case in the direction of transporting the sorted material, the outer side of the threshing device in the upper region of the connecting frame is It is easier to obtain a wider working space in the lower side area than on the outside side of the threshing device. In this configuration, the first fixing portion is located in the upper region of the upper region and the lower region of the connecting frame, which is the one where it is easier to obtain a wider working space. The second fixing portion facilitates fixing to the side of the sheave case.

In the present invention,
a No. 1 collection section that collects the No. 1 processed material sorted by the chaff sieve; and a No. 2 processing material that is provided on the downstream side of the No. 1 collection section in the transfer direction of the sorted material and that is sorted by the chaff sieve. a No. 2 collection section for collecting the sorted materials, the first fixing section is provided above a location between the No. 1 collection section and the No. 2 collection section in the sorted material transfer direction, and the first fixing section is provided above a location between the No. It is preferable that the second fixing part is provided above the number collecting part.

According to this configuration, the length of the front part of the connection frame from the part where the first fixing part is located to the upper end in the sorted material transfer direction, the part where the first fixing part is located and the second fixing part. The length of the intermediate part between the part where the second fixing part is located and the length of the rear part from the part where the second fixing part is located to the end on the lower side in the direction of transporting the sorted material are both too short and long. No. Therefore, regardless of the swinging of the sheave case, the front, middle, and rear parts of the connecting frame are difficult to swing, and twisting between the connecting frame and the chaflip plate is less likely to occur, and the connecting frame or chaflip plate is Less likely to wear out.

In the present invention,
The chaflip plate is provided with an upper fulcrum shaft and a lower fulcrum shaft, and the chaflip plate is connected to the side part in a state of being fitted onto the upper fulcrum shaft, and the chaflip plate is supported by the side part so that its posture can be changed. The connecting frame is fitted onto the lower fulcrum shaft and connected to the chaff plate, and the support member has a thickness in a direction along the axis of the upper fulcrum shaft. It is preferable that the thickness of the connecting frame is thicker than the thickness of the connecting frame in the direction along the axis of the lower fulcrum shaft.

According to this configuration, the upper fulcrum shaft is firmly supported by the support member so that it is unlikely to wobble, thereby making it difficult for the connection plate to swing. Therefore, looseness between the chaff flip plate and the connecting plate is less likely to occur, and the connecting frame or the chaff flip plate is less likely to wear out.

FIG. 2 is an overall side view of the combine harvester. FIG. 2 is an overall plan view of the combine harvester. It is a longitudinal side view of a threshing device. It is a longitudinal cross-sectional rear view of the upper part of a threshing device. FIG. 2 is a side view of a portion of the sorting section where a chaff sieve, a first collection section, and a second collection section are located. FIG. 3 is a vertical side view of the chaff sieve. 6 is a sectional view taken along line VII-VII in FIG. 5. FIG. 6 is a sectional view taken along line VIII-VIII in FIG. 5. FIG. 6 is a sectional view taken along line IX-IX in FIG. 5. FIG. 6 is a sectional view taken along line XX in FIG. 5. FIG.

Hereinafter, a case where an embodiment of a threshing device according to the present invention is applied to a threshing device mounted on a normal type combine harvester will be described based on the drawings.

〔overall structure〕
1 and 2 show a conventional combine harvester for harvesting crops such as rice and wheat. This combine harvester includes a traveling machine body V and a reaping conveyance section 3. The traveling body V has a body frame 1 and a pair of left and right crawler type traveling devices 2. The crawler type traveling device 2 is installed at the lower part of the fuselage frame 1. The reaping conveyance unit 3 reaps the planted grain culms as crops to be harvested and conveys the harvested grains toward the rear. The reaping conveyance section 3 is connected to the front part of the traveling machine body V in a state where it can swing up and down. The traveling body V includes, on the body frame 1, a threshing device 4, a grain tank 5, a grain discharge device 6, a driving section 7, and the like. The threshing device 4 handles and processes the harvested grain culms as a crop transported from the reaping transport section 3, and separates the threshed product obtained by the handling into grains and waste straw. The grain tank 5 stores grains obtained by the threshing device 4. The grain discharge device 6 discharges grains stored in the grain tank 5 to the outside of the machine. The operator boards the driving section 7 and performs driving operations in the driving section 7. This combine harvester is configured as a full-culm input type that cuts and reaps the base of the planted grain culm and inputs all of the reaped grain culm into the threshing device 4.

The operating section 7 is located on the right side of the front part of the machine. A grain tank 5 is provided behind the driving section 7. Furthermore, the threshing device 4 is located on the left side, and the grain tank 5 is located on the right side. Thereby, the threshing device 4 and the grain tank 5 are provided side by side in the left-right direction. An engine 8 for driving the combine harvester is provided below the driving section 7.

In this embodiment, when defining the longitudinal direction of the aircraft, it is defined along the aircraft's traveling direction in the working state, and when defining the left and right direction of the aircraft, the left and right are defined as seen from the aircraft's traveling direction. . That is, the direction indicated by the symbol (F) in FIGS. 1 and 2 is the front side of the fuselage, and the direction indicated by the symbol (B) in FIGS. 1 and 2 is the rear side of the fuselage. The direction indicated by the symbol (L) in FIG. 2 is the left side of the body, and the direction indicated by the symbol (R) in FIG. 2 is the right side of the body. Therefore, the left-right direction of the fuselage corresponds to the width direction of the fuselage.

The reaping conveyance section 3 includes a reaping processing section 9 and a feeder 10. The reaping processing unit 9 reaps the planted grain culms as the machine travels. The feeder 10 conveys the harvested grain culm harvested by the harvest processing section 9 toward the threshing device 4 on the rear side of the machine body. The reaping transport section 3 is supported so as to be able to rise and fall freely around the horizontal axis P1 by expanding and contracting a hydraulic cylinder 11 for elevating and lowering the reaping, which is installed across the machine frame 1 and the feeder 10.

The reaping processing unit 9 includes a reaping frame 12, a pair of left and right dividers 13, a rotating reel 14, a clipper-shaped cutting blade 15, and an auger 16. The reaping frame 12 is a frame body that supports the entire reaping processing section 9. The divider 13 divides the planted grain culms to be harvested and the planted grain culms to be not harvested. The rotating reel 14 scrapes the planted grain culm to be harvested backward. The cutting blade 15 cuts and reaps the base side of the planted grain culm to be harvested. The auger 16 cross-feeds the cut grain culms to the middle side in the left-right direction, gathers them together, and sends them out rearward.

[Threshing device]
As shown in FIG. 2, the threshing device 4 is disposed on the left side of the grain tank 5. As shown in FIGS. 3 and 4, the threshing device 4 includes

side walls

24 and 25 located on both left and right sides, a front wall 26 located at the front end, a rear wall 27 located at the rear end, etc. It is made up of. The threshing device 4 includes a device main body 20 with an open top, and a top plate 21 that covers the top of the device main body 20. As shown in FIGS. 1 and 2, the threshing device 4 is equipped with a threshing device cover 76 that covers the device main body 20 from the left lateral outside. As shown in FIG. 1, the thresher cover 76 is divided into a first divided cover 76a, a second divided cover 76b, a third divided cover 76c, and a fourth divided cover 76d. The first divided cover 76a is located at the front upper part of the threshing device cover 76. The second divided cover 76b is located on the rear side of the first divided cover 76a. The third divided cover 76c is located below the front portions of the first divided cover 76a and the second divided cover 76b. The fourth divided cover 76d is located on the rear side of 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 openable and closable by being attached and detached individually.

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.

[Threshing Department]
As shown in FIG. 3, the threshing section 4A has a handling chamber 28. The handling chamber 28 is formed in the upper part of the internal space of the device main body 20. The handling chamber 28 is equipped with a handling cylinder 22. The handling cylinder 22 is rotatably driven around a horizontal axis X1 extending from front to back of the machine body to handle and process crops. The handling cylinder 22 includes a handling cylinder shaft 31. The handling barrel shaft 31 is rotatably supported around the horizontal axis X1 across the front wall portion 26 and the rear wall portion 27. The handling cylinder 22 is configured such that the entire handling cylinder 22 including the handling cylinder shaft 31 rotates integrally around the handling cylinder shaft 31. The handling barrel shaft 31 is rotationally driven by power from the engine 8 . The handling barrel 22 is driven to rotate clockwise when viewed from the front of the fuselage (that is, clockwise when viewed from the front of the fuselage, in the direction of rotation shown by arrow K in FIG. 4, which is a longitudinal rear view).

As shown in FIG. 3, the handling cylinder 22 includes a scraping part 22A provided at the front of the handling cylinder 22, and a handling part 22B provided on the rear side of the scraping part 22A. . The rear part of the scraping part 22A and the front part of the handling part 22B are connected. The handling section 22B includes a plurality of support plates 32, a plurality of support rods 33, and bar-shaped handling teeth 34. The plurality of support plates 32 are formed in a disc shape and are connected and fixed to the handling barrel shaft 31 so as to be freely rotatable together. The plurality of support rods 33 are distributed at equal intervals in the circumferential direction of the handling cylinder 22 and connected to each support plate 32, respectively. The handling teeth 34 protrude toward the outer peripheral side of the handling barrel 22 from a plurality of locations lined up in the axial direction of each support rod 33.

An arcuate receiving net 23 is provided below the handling cylinder 22. Although not described in detail, the receiving net 23 is composed of a large number of circular arc-shaped horizontal bars and a large number of vertical bars that extend in the axial direction and connect the horizontal bars. Thereby, the receiving net 23 is configured as a net-like body having a well-known structure in which a large number of passage holes for grains to pass are formed.

The handling chamber 28 is formed by the

side walls

24 and 25, the front wall 26, and the rear wall 27 of the apparatus main body 20, the top plate 21 that covers the upper part of the apparatus main body 20, the receiving net 23, and the like. A dust feed valve 35 is provided on the inner surface of the top plate 21. The dust feeding valve 35 transfers and guides the processed material toward the rear of the machine body along the rotational axis direction of the handling barrel 22 as the handling barrel 22 rotates.

In the threshing section 4A, the entire harvested grain culm from the base to the tip is fed into the handling chamber 28 from the supply port 30 by the feeder 10. The supply port 30 is located at the front end of the handling chamber 28. The inputted harvested grain culm is scraped into the handling chamber 28 by the raking section 22A as a threshed product, and is threshed by the handling section 22B and the receiving net 23. The threshed material to be threshed is given a rotational force by the rotating handling section 22B, hits the dust feeding valve 35, and is guided by the dust feeding valve 35 to flow toward the rear of the handling chamber 28. The threshed material is transported toward the rear of the handling chamber 28 by the handling section 22B and is threshed. The grains obtained by the threshing process leak through the receiving net 23. The threshed culm, cut straw, etc. generated by the threshing process are discharged to the outside of the handling chamber 28 from a culm discharge section 29 located at the rear end of the handling chamber 28.

[Reception net]
As shown in FIGS. 3 and 4, the receiving net 23 has two division points Z1 located in the front-rear direction of the handling cylinder 22, and a division point Z2 located in one position in the circumferential direction of the handling cylinder 22. It is divided by. Thereby, the receiving net 23 is divided into six divided receiving net bodies 23a. The six divided receiving net bodies 23a have the same length in the longitudinal direction of the handling cylinder, length in the circumferential direction of the handling cylinder, and the same shape.

As shown in FIG. 4, an opening/closing axis X2 is provided at one of both lateral ends of the top plate 21. A bolt 19 with an operating tool is provided at the other lateral end of both lateral ends of the top plate 21 . The bolt 19 with the operating tool fixes the top plate 21 in the closed position by being connected to a spacer member 20a provided in the main body 20 of the apparatus. The top plate 21 can be placed in an open position by loosening the bolt 19 with the operating tool to release the closed fixation of the top plate 21 and swinging the top plate 21 upward using the opening/closing axis X2 as a swing fulcrum. . When the top plate 21 is in the open position, each of the six divided net receiving bodies 23a in the handling chamber 28 can be taken out above the apparatus main body 20 through the upper opening of the apparatus main body 20. Furthermore, when the top plate 21 is in the open position, each of the six divided receiving net bodies 23a can be inserted into the handling chamber 28 from above the apparatus main body 20 through the upper opening of the apparatus main body 20. be. Furthermore, the assembly positions of the six divided receiving net members 23a in the handling chamber 28 can be changed (rotated). For example, among the three split receiving net members 23a lined up along the front-rear direction of the handling cylinder 22, the split receiving net member 23a, which is located at the front and is easily worn out, is moved to the second assembly position from the front and assembled. The split receiving net body 23a located at the second assembly position from the front is moved to the third assembly position from the front and assembled, and the split receiving net body 23a located at the third assembly position from the front is assembled. can be moved to the frontmost assembly position and assembled.

[Sorting Department]
As shown in FIG. 3, the sorting section 4B includes a swing sorting device 36, a first collection section 37, a second collection section 38, and a winnow 39. The oscillating sorting device 36 receives the processed material leaking downward from the receiving net 23 as a sorted material, and sorts the received sorted material while transferring it toward the rear of the threshing device. The No. 1 recovery section 37 recovers grains as the No. 1 processed material leaked from the swing sorting device 36. The No. 2 recovery unit 38 recovers the No. 2 processed material such as grains with branches leaked from the swing sorting device 36 . The winnower 39 supplies sorting air to the swing sorting device 36.

The No. 1 collecting section 37 is configured to transport the collected grains to the outside of the threshing device 4 laterally by means of a lateral feed screw 37a. The grains collected in the first collection section 37 are transported to the outside of the lateral side of the threshing device 4, then transported upward by the grain transport device 40 (see FIG. 2) and stored in the grain tank 5. be done.

The No. 2 collection section 38 is configured to transport the collected No. 2 processed material to the outside of the lateral side of the threshing device 4 by a cross-feeding screw 38a. Then, the No. 2 processed material collected by the No. 2 collection section 38 is transported to the outside of the lateral side of the threshing device 4, and then returned to the handling room 28 by the No. 2 processing material returning device 41 (see Fig. 2). treated and processed.

The swinging sorting device 36 has a sheave case 42, as shown in FIG. The sheave case 42 is provided below the receiving net 23. The sheave case 42 has a rectangular frame shape in plan view. 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.

The sheave case 42 includes a guide roller 49. The guide rollers 49 are located on the left and right outer sides of the sheave case 42 on the front side of the body. The left and

right side walls

24 and 25 of the threshing device 4 are provided with sliding guide portions (not shown) that slidably guide the guide roller 49. A crank-type swing drive section 52 is provided below the rear side of the threshing device in the sheave case 42. As the swing drive unit 52 operates, a portion of the sheave case 42 on the rear side of the threshing device moves in a circular motion. Therefore, the entire sheave case 42 performs a back-and-forth rocking motion with a vertical component.

As shown in FIG. 3, the first grain pan 43 is composed of a plate formed into a substantially corrugated shape when viewed from the side. The first grain pan 43 is provided at the upper end (front end) of the swing sorting device 36 in the direction of transporting the sorted materials. The first grain pan 43 transfers the processed material leaking from the upper side in the transfer direction of the threshed material in the handling chamber 28 to the rear.

The sieve wire 45 is made of piano wire or the like. The sieve line 45 extends in a cantilevered manner from the end of the first grain pan 43 on the lower side in the transfer direction toward the lower side in the transfer direction. The sieve line 45 transports the sorted material sent out from the first grain pan 43 backward, while leaking the grains and the second processed material downward.

Similarly to the first grain pan 43, the second grain pan 44 is made of a plate formed into a substantially corrugated shape when viewed from the side. The second grain pan 44 is located on the downstream side of the first grain pan 43 in the transfer direction and on the lower side. The second grain pan 44 transports the processed material leaking from the downstream side of the first grain pan 43 in the transfer direction and the processed material leaking from the sieve line 45 to the rear.

The chaff sieve 46 is located on the downstream side of the second grain pan 44 in the direction of transporting the sorted materials. The chaff sieve 46 directs the sorted material sent out from the second grain pan 44, the sorted material leaked from the sieve line 45, and the processed material leaked from the receiving screen 23 of the handling chamber 28 toward the rear of the sieve case 42. The grains and No. 2 processed material are leaked downward while being oscillated and transferred.

The grain sieve 47 is made of a crimp net with many openings for grain passage. The grain sheave 47 is located below the chaff sheave 46. The grain sheave 47 is supported by a front support member 60 and a rear support member 61, respectively. The front support member 60 and the rear support member 61 are supported across the left and right sides 42A of the sheave case 42. This grain sieve 47 oscillates and transfers the processed material leaking from the chaff sieve 46, causing the grains to leak into the first collection section 37 located below, and the second processing material to the second collecting section 38 on the downstream side in the transfer direction. Transfer to.

The straw rack 48 is provided on the downstream side of the chaff sieve 46 in the transport direction. The straw rack 48 has a rack support 62 and a plurality of transport rack plates 63. The rack support body 62 is constructed and connected across the left and right sides 42A of the sheave case 42. The plurality of transfer rack plates 63 are fixedly extended rearward in a cantilevered manner from the rack support body 62 at intervals from each other in the left-right direction. The transfer rack plate 63 is made of a sawtooth-shaped plate. The transfer rack plate 63 can receive the processed material and swing and transfer it rearward.

The straw rack 48 swings and transfers the processed material supplied from the terminal end of the handling chamber 28 in the transfer direction and the terminal end of the chaff sieve 46 toward the rear, while transporting the second processed material to the second collection section 38 located below. Let it leak. Further, the straw rack 48 discharges waste straw and other waste that has not leaked out to the outside through the dust exhaust port 65 at the rear.

As shown in FIG. 3, the chaff sieve 46 and the straw rack 48 are arranged in close proximity to each other along the transport direction. Therefore, the gap between the chaff sheave 46 at the end in the transfer direction and the straw rack 48 at the start end in the transfer direction is small. This makes it difficult for cut straw and the like to fall from the gap into the second collecting section 38 below. With this configuration, for example, when harvesting a crop that requires a large amount of threshing material, such as indica rice, a large amount of cut straw falls from the gap between the chaff sieve 46 and the straw rack 48, and the second material reducing device 41 is clogged, or the cut straw circulates between the handling chamber 28 and the second collection section 38 and is not discharged to the outside, etc., can be avoided. The cut straw is transported rearward by the straw rack 48 and discharged from the dust outlet 65.

As shown in FIG. 3, a downstream guide member 66 is provided on the rear side of the second recovery section 38. The downstream guide member 66 guides the No. 2 processed material leaking from the chaff sieve 46 and the straw rack 48 to the No. 2 collection section 38 at a location on the rear side of the No. 2 collection section 38 . Although not shown, the downstream guide member 66 has a two-layer structure including a thick soft sheet-like body and a thin hard sheet-like body. In the downstream guide member 66, the soft sheet-like body is located on the upper side, and the hard sheet-like body is located on the lower side. The soft sheet-like body is made of a soft resin material that is easily displaced along the inclined guide surface 67 of the second recovery section 38. The hard sheet-like body is made of a hard material that is hard to wear. The hard sheet-like body is in contact with the inclined guide surface 67 of the second recovery section 38.

[Chaff Sheeb]
As shown in FIGS. 3 and 6, the chaff sheave 46 includes a plurality of band-like chaf flip plates 50. The plurality of chaflip plates 50 are lined up at intervals along the sorted material transfer direction (the front-rear direction of the threshing device).

Each chaflip plate 50 is supported by the sheave case 42 in a state where its posture can be changed. Specifically, as shown in FIGS. 6, 7, 8, and 9, an upper fulcrum shaft 54 is provided at the upper part of the chaflip plate 50 on the left side end side of the chaflip plate 50. As shown in FIGS. The upper fulcrum shaft 54 is supported by the left side 42A of the sheave case 42. The upper fulcrum shaft 54 is supported on the side portion 42A by a long support member 55 extending in the direction of transferring the sorted material of the chaff sieve 46 (the front-rear direction of the threshing device) and fitted onto the upper fulcrum shaft 54. This is done by connecting connecting members 56 attached to a plurality of locations in the front-rear direction of 55 to the side portion 42A using connecting bolts 57. The connection member 56 is attached to the support member 55 by welding. Among the plurality of chaflip plates 50, the chafflip plates 50 excluding the first chaflip plate 50a and the second chaflip plate 50b have a retaining plate 58 and a pull-out prevention plate 58 for preventing the support member 55 from coming off on the upper fulcrum shaft 54. A retaining pin 59 is attached. A connecting frame 70 is connected to the lower part of the chaflip plate 50. The connection frame 70 is elongated in the direction along the transfer direction of the sorted material of the chaff sieve 46 (the front-rear direction of the threshing device). A plurality of chaflip plates 50 are interlocked and connected to each other by a connection frame 70. The connection frame 70 is connected to the chaflip plate 50 by fitting the connection frame 70 onto the lower fulcrum shaft 71. The lower fulcrum shaft 71 is provided at the lower part of the chaflip plate 50. The thickness 55W of the support member 55 in the direction along the axis Y of the upper fulcrum shaft 54 is thicker than the thickness 70W of the connecting frame 70 in the direction along the axis Q of the lower fulcrum shaft 71. As shown in FIGS. 7 and 8, among the plurality of chaflip plates 50, a reinforcing portion 72 is attached to the connection frame 70 in the first chaflip plate 50a and the second chaflip plate 50b. In some chaflip plates 50 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 connection frame 70 from coming off.

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

Each chaflip plate 50 is supported by the sheave case 42 in such a manner that its attitude relative to the sheave case 42 can be changed by swinging about the axis Y of the upper fulcrum shaft 54 as a swing fulcrum. By moving the connecting frame 70 in the front-back direction, the plurality of chaflip plates 50 change their posture with respect to the sheave case 42 while being interlocked by the connecting frame 70. By adjusting the posture of the plurality of chaff flip plates 50 with respect to the sieve case 42, the opening degree between the chaff flip plates 50, that is, the size of the processed material leakage hole through which the sorted processed material of the chaff sieve 46 leaks is adjusted. can do.

[First fixed part, second fixed part]
When the position of the connecting frame 70 is adjusted, the chaff sheave 46 is provided with a plurality of fixing parts 80 that fix the connecting frame 70 to the sheave case 42 at the adjusted position (post-adjusted position or adjustable position). ing. The plurality of fixing parts 80 are distributed and located in a direction along the direction in which the chaff sieve 46 transfers the sorted materials. In the present embodiment, the fixing portion 80 includes an upper region of the connection frame 70 that is located on the upper side in the sorted material transfer direction with respect to a central portion 70C of the chaff sieve 46 in the sorted material transfer direction, and Of the frame 70, they are provided in each of the lower side regions located on the lower side in the sorted material transfer direction with respect to the central location 70C.

In this embodiment, as shown in FIGS. 3 and 5, two fixing parts 80 are provided. The two fixing parts 80 are provided in an upper region of the connecting frame 70 and a lower region of the connecting frame 70. In this embodiment, of the two fixing parts 80, the first fixing part 80A located in the upper region of the connection frame 70 is connected to the first collecting part 37 and the second collecting part 38 in the sorted material transfer direction of the chaff sieve 46. It is provided at a location above the location between. Of the two fixing parts 80, the second fixing part 80B located in the lower region of the connection frame 70 is provided at a location above the second collection part 38.

As shown in FIGS. 5 and 8, the first fixing portion 80A includes a first fixing member 81, a lower fulcrum shaft 71 of one of the plurality of chaff flip plates 50a, and a first A positioning bolt 85 is provided. The first fixing member 81 is provided on the outside of the left side portion 42A of the sheave case 42.

As shown in FIGS. 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. Thereby, the first fixing member 81 is supported by the side portion 42A in a swingable state using the axis Y1 of the support shaft 82 as a swing fulcrum. The first fixed portion 80A is supported by the side portion 42A in a swingable state about 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 support shaft 54 of the first chaflip plate 50a. A retaining plate 83 and a screw hole member 82a are attached to the support shaft 82 to prevent the first fixing member 81 from coming off. The lower fulcrum shaft 71 interlocks and connects the lower part of the first chaflip plate 50a and the free end side portion of the first fixing member 81. The lower fulcrum shaft 71 is inserted through the elongated hole 84 so as to be movable inside the elongated hole 84 provided in the side portion 42A. The elongated hole 84 has an arc shape centered on the axis Y1.

As shown in FIG. 5, the first fixing member 81 is provided with a plurality of through-hole-shaped first positioning holes 86. The first positioning bolt 85 can be inserted into the first positioning hole 86, but does not engage with it. A plurality of screw hole-shaped first fixing holes 87 are provided in the side portion 42A. The first positioning bolt 85 can be engaged and detached from the first fixing hole 87 . The first positioning bolt 85 is attached to one of the first positioning holes 86 selected from the plurality of first positioning holes 86 so as to be inserted therethrough. When the first positioning bolt 85 is engaged with one of the plurality of first fixing holes 87 to which the first positioning hole 86 is aligned, the first positioning bolt 85 is inserted into the first fixing hole 87. It is in a locked state so that the portion 80A is fixed 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, it enters the unlocked state so as to allow the first fixing portion 80A to swing.

An operation opening 88 (see FIG. 3) is provided in the left side wall portion 24 of the device main body 20 so as to be openable and closable. Regarding the first fixing portion 80A, the operator accesses the first positioning bolt 85 through the operation opening 88, puts the first positioning bolt 85 in the unlocked state, and swings the first fixing member 81. Then, the lower fulcrum shaft 71 is swung by the first fixing member 81 using the axis Y1 as a fulcrum, and the connection frame 70 is repositioned by the lower fulcrum shaft 71 in the front-rear direction of the threshing device. 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 that corresponds to the first positioning hole 86 . Then, the first fixing member 81 is fixed to the side portion 42A by the first positioning bolt 85, and the first fixing portion 80A is positioned at the swing position corresponding to the target adjustment position of the connection frame 70. As a result, the connecting frame 70 is adjusted to the adjustment position of the adjustment target by the first fixing part 80A, and the first fixing part 80A (lower fulcrum shaft 71, first fixing member 81 and a first positioning bolt 85).

As shown in FIGS. 5, 9, and 10, the second fixing portion 80B includes a second fixing member 91, a lower fulcrum shaft 71 of one of the chaff flip plates 50 of the chaff flip plates 50, and a second A positioning bolt 97 is provided. The second fixing member 91 is provided outside the left side portion 42A of the sheave case 42.

The second fixing member 91 is supported by a support shaft 92 provided on the left side 42A of the sheave case 42. Thereby, the second fixing member 91 is supported by the side portion 42A in a swingable state using the axis Y2 of the support shaft 92 as a swing fulcrum. The second fixed portion 80B is supported by the side portion 42A in a swingable state about 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 support shaft 54 of the second chaflip plate 50b. A retaining plate 93 and a screw hole member 92a are attached to the support shaft 92 to prevent the second fixing member 91 from coming off. The lower fulcrum shaft 71 interlocks and connects the lower part of the second chaff plate 50b and the free end side portion of the second fixing member 91. The lower fulcrum shaft 71 is inserted through the elongated hole 94 so as to be movable inside the elongated hole 94 provided in the side portion 42A. The elongated hole 94 has an arc shape centered on the axis Y2.

As shown in FIGS. 5 and 10, the second fixing member 91 is provided with a second positioning hole 95 in the shape of an arcuate long hole centered on the axis Y2. A second screw hole-shaped fixing hole 96 is provided in the left side portion 42A of the sheave case 42. The second positioning bolt 97 is attached to the second positioning hole 95 so as to pass through the second positioning hole 95, and is tightened into the second fixing hole 96, thereby tightening the second fixing part 80B to the side part 42A. It will be in a locked state so that it is fixed. By loosening the second positioning bolt 97 into the second fixing hole 96, the second positioning bolt 97 releases the fixation to the side portion 42A of the second fixing part 80B, allowing the second fixing part 80B to swing. Becomes unlocked.

When adjusting the position of the connecting frame 70 by the first fixing part 80A, the operator accesses the second positioning bolt 97 through the operation opening 88 and unlocks the second positioning bolt 97 with respect to the second fixing part 80B. keep it in condition. Then, as the connection frame 70 is changed in position by the first fixing part 80A, the swinging motion of the first fixing part 80A is transmitted to the lower fulcrum shaft 71 via the connection frame 70. As a result, the second fixed portion 80B is operated to swing about the axis Y2 as a swing fulcrum. After the first fixing portion 80A is fixed to the side portion 42A, the operator locks the second positioning bolt 97. Then, the second fixing part 80B is positioned at the swing position corresponding to the adjustment position of the connection frame 70 adjusted by the first fixing part 80A. As a result, the connecting frame 70 is adjusted to the adjustment position of the adjustment target by the second fixing part 80B, and the connecting frame 70 is at the adjustment target adjustment position of the second fixing part 80B (lower fulcrum shaft 71, second fixing member 91 and a second positioning bolt 97).

The size of the processed 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 portion 24 of the device main body 20. The second positioning bolt 97 is accessed through the opened operation opening 88, and the second positioning bolt 97 of the second fixing part 80B is loosened to release the fixation of the second fixing part 80B to the side part 42A, and the second fixing part 80B is released from the side part 42A. The fixation of the connecting frame 70 to the side portion 42A by the portion 80B is released. Next, the first positioning bolt 85 is accessed through the operation opening 88, and the first positioning bolt 85 of the first fixing part 80A is removed to release the fixation of the first fixing part 80A to the side part 42A. The fixing of the connecting frame 70 to the side portion 42A by the fixing portion 80A is released and the first fixing portion 80A is operated to swing, thereby changing the position of the connecting frame 70. When the connecting frame 70 reaches the adjustment target adjustment position, the first positioning bolts 85 are attached to the matching first positioning holes 86 of the first fixing part 80A and the first fixing holes 87 of the side part 42A. The fixing part 80A is fixed to the side part 42A, and the upper region of the connection frame 70 is fixed to the side part 42A by the first fixing part 80A. Next, the second positioning bolt 97 of the second fixing part 80B is tightened to fix the second fixing part 80B to the side part 42A, and the lower side region of the connecting frame 70 is fixed to the side part 42A by the second fixing part 80B. .

[Another embodiment]
(1) In the above embodiment, an example was shown in which the fixing portion 80 was provided on the left side of the sheave case 42, but the present invention is not limited thereto. For example, the fixing portion 80 may be provided on the right side of the sheave case 42.

(2) In the above embodiment, an example was shown in which two fixing parts 80 were provided, but the present invention is not limited to this. For example, three or more fixing parts 80 may be provided.

(3) In the above embodiment, an example was shown in which one fixing portion 80 was provided in each of the upper region and the lower region of the connection frame 70, but the present invention is not limited to this. For example, it is possible to provide two or more fixing parts 80 in each of the upper region and the lower region of the connection frame 70.

(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 70. but not limited to. For example, the second fixing portion 80B may be provided in the upper region of the connecting frame 70, and the first fixing portion 80A may be provided in the lower region of the connecting frame 70.

(5) In the above embodiment, an example was shown in which a plurality of first fixing holes 87 were provided in the side portion 42A, but the present invention is not limited to this. For example, only one first fixing hole 87 is provided in the side part 42A, and each of the plurality of first positioning holes 86 of the first fixing member 81 (first fixing part 80A) is connected to one first fixing hole 87. It is also possible to adopt a configuration that matches the above.

(6) In the above embodiment, an example was shown in which a plurality of first positioning holes 86 were provided in the first fixing member 81 (first fixing portion 80A) and a first fixing hole 87 was provided in the side portion 42A. The invention is not limited to this. For example, a plurality of positioning holes (or first fixing holes 87) that can be engaged with the first positioning bolts 85 are provided in the side portion 42A, and only one first fixing hole is provided in the first fixing member 81 (first fixing portion 80A). A positioning hole 86 is provided, and the first positioning hole 86 of the first fixing member 81 (first fixing part 80A) is connected to one positioning hole (or A configuration may be adopted in which the first fixing hole 87) is aligned with the first fixing hole 87).

(7) In the above embodiment, an example is shown in which the second fixing member 91 (second fixing part 80B) is provided with the second positioning hole 95 in the shape of an elongated hole, and the second fixing hole 96 is provided in the side portion 42A. However, the present invention is not limited thereto. For example, an elongated second positioning hole 95 is provided in the side portion 42A, a positioning hole into which the second positioning bolt 97 is inserted is provided in the second fixing member 91 (second fixing portion 80B), and a second positioning hole 95 is provided in the second fixing member 91 (second fixing portion 80B). The second fixing member 91 (second fixing part 80B) is attached to the side part 42A by the second positioning bolt 97 attached to the positioning hole of the second fixing part 80B) and the screw hole member engaged with the second positioning bolt 97. A configuration in which it is tightened and fixed may be adopted.

(8) In the embodiment described above, an example is shown in which the thickness 55W of the support member 55 is thicker than the thickness 70W of the connection frame 70, but the present invention is not limited thereto. The thickness of the support member 55 may be thinner than the thickness of the connection frame 70, or the thickness of the support member 55 and the thickness of the connection frame 70 may be the same.

The present invention can be applied to a threshing device mounted on a regular combine harvester or a self-threshold combine harvester.

4A Threshing section

4B Sorting section 22 Handling cylinder 23 Receiving net 28 Handling room 37 No. 1 collection section 38 No. 2 collection section 42 Sheave case 42A Side part 46 Chaff sheave 50 Chaff flip plate 54 Upper fulcrum shaft 55 Support member 70 Connection frame 71 Lower fulcrum Shaft 70C Central location 80 Fixed part 80A First fixed part 80B Second fixed part 85 First positioning bolt 86 First positioning hole 95 Second positioning hole 97 Second positioning bolt Y Axis center (upper fulcrum shaft)
Q Axis center (lower fulcrum axis)

Claims

Equipped with a threshing section and a sorting section,
The threshing section includes a handling chamber into which harvested crops are supplied, a handling cylinder which is rotatably provided in the handling chamber and handles and processes the supplied crops, and a receiving net provided below the handling cylinder. and,
The sorting section includes a sheave case that is swingably provided below the receiving net, and is supported by the sheave case, and receives the threshed material leaking from the receiving net as the sorted material, and also receives and sorts the received threshing material. It has a chaff sieve for sorting the processed material,
The chaff sheave includes a plurality of chaff flip plates supported by the sheave case, and a connection frame that connects the plurality of chaff flip plates,
The plurality of chaff flip plates are arranged at intervals along the transfer direction of the sorted material of the chaff sieve, and are changeable in orientation,
The plurality of chaflip plates are configured to change their posture by adjusting the position of the connection frame,
A plurality of fixing parts are provided for fixing the connection frame to a side of the sheave case at an adjusted adjustment position,
In the threshing device, the plurality of fixing parts are distributed in a direction along the sorted material transfer direction.
The fixing portion includes an upper region of the connecting frame located on the upper side in the sorted material transfer direction with respect to a central location in the sorting material transfer direction, and an upper region of the connecting frame located on the upper side in the sorted material transfer direction The threshing device according to claim 1, wherein the threshing device is provided in each of the lower side regions located on the lower side in the transfer direction of the sorted material with respect to the location.
Each of the fixed part located in the upper region and the fixed part located in the lower region is swingably supported by the side part,
The first fixing part, which is one of the fixing part located in the upper region and the fixing part located in the lower region, is provided on one of the first fixing part and the side part. a plurality of first positioning holes; a first positioning bolt that is attached to any one of the first positioning holes selected from the plurality of first positioning holes and connects the first fixing part to the side part; , configured to position the connection frame at a swing position corresponding to the adjustment position,
The plurality of first positioning holes are located corresponding to each of the plurality of adjustment positions of the connection frame,
The second fixing part, which is the other of the fixing part located in the upper region and the fixing part located in the lower region, is provided on one of the second fixing part and the side part. A second positioning hole in the form of an elongated hole, and a second positioning bolt that is attached to the second positioning hole and connects the second fixing part to the side part allow the connecting frame to be oscillated to correspond to the adjustment position. 3. The threshing device of claim 2, wherein the threshing device is configured to be positioned in a dynamic position.
the first fixing part is provided in the upper region,
The threshing device according to claim 3, wherein the second fixing portion is provided in the lower side region.
a No. 1 collection section that collects the No. 1 processed material sorted by the chaff sieve;
A second recovery section is provided on the downstream side of the first recovery section in the transfer direction of the sorted objects and collects the second object sorted by the chaff sieve,
The first fixing part is provided above a location between the first collection part and the second collection part in the sorted material transfer direction,
The threshing device according to claim 4, wherein the second fixing part is provided above the second collecting part.
The chaflip plate is provided with an upper fulcrum shaft and a lower fulcrum shaft,
A support member is provided that is connected to the side part while being fitted onto the upper fulcrum shaft and supports the chaff flip plate on the side part so that its posture can be changed;
The connection frame is externally fitted onto the lower fulcrum shaft and is connected to the chaflip plate,
The thickness of the support member in the direction along the axis of the upper support shaft is thicker than the thickness of the connection frame in the direction along the axis of the lower support shaft. Threshing equipment.