CN112119772A

CN112119772A - Threshing device

Info

Publication number: CN112119772A
Application number: CN202010572348.3A
Authority: CN
Inventors: 高木雅志; 高比良学; 永田哲治
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2019-06-25
Filing date: 2020-06-22
Publication date: 2020-12-25
Also published as: JP2021003015A; KR20210000670A; JP7155069B2

Abstract

The invention provides a threshing device which is provided with a threshing chamber for inserting the ear tip side part of a harvested grain stalk, a threshing cylinder arranged in the threshing chamber, a screen arranged below the threshing cylinder, a threshing supply chain for clamping and conveying the stalk root side part of the harvested grain stalk, and a sorting chamber arranged below the threshing chamber. A partition member (26) is provided at a position (10a) on the opposite side of the threshing feeding chain in the left-right direction at a position corresponding to the front end (11F) of the threshing cylinder (11) in the threshing chamber, and the partition member (26) partitions a processing space formed between the threshing cylinder (11) and the screen (15) and the sorting chamber. According to the threshing device having this configuration, the straw chips generated at the portion of the threshing chamber corresponding to the front end portion of the threshing cylinder are less likely to fall into the sorting chamber.

Description

Threshing device

Technical Field

The present invention relates to threshing apparatus.

Background

As shown in patent document 1, for example, the threshing device includes: a threshing chamber into which a tip side part of the harvested grain stalks is inserted; a threshing cylinder provided in the threshing chamber and threshing an ear tip side part inserted into the threshing chamber; a screen disposed around an outer side of a lower portion of the threshing cylinder; a separation chamber provided below the threshing chamber and separating the grains and dust leaked from the screen mesh; and a threshing supply chain which extends in the front-rear direction of the threshing chamber on the lateral side of the threshing chamber and clamps and conveys the part of the stalk and root side of the harvested straws to the rear of the threshing chamber.

Patent document 1: japanese unexamined patent application publication No. 2018-102152

In the above threshing device, the side of the tip of the ear located at the front of the threshing chamber is in a state of carrying a large number of grains, and the straw bodies are often entangled, and therefore, long cut straws are easily produced at the front of the threshing chamber. In the front of the threshing chamber, if long cut straws leak from the screen, the long cut straws are easily mixed into the fine grains taken out of the sorting chamber. If straw chips are mixed in the fine grains, hulling is hindered or removal is performed with time.

Disclosure of Invention

The invention provides a threshing device which is difficult to mix straw scraps into fine grains.

The threshing device of the present invention comprises: a threshing chamber into which a tip side part of the harvested grain stalks is inserted; a threshing cylinder provided in the threshing chamber and threshing an ear tip side part inserted into the threshing chamber; a screen disposed around an outer side of a lower portion of the threshing cylinder; a separation chamber provided below the threshing chamber and separating the grains and dust leaked from the screen mesh; a threshing supply chain extending in the front-rear direction of the threshing chamber on the lateral side of the threshing chamber and clamping and conveying the parts of the stalks and roots of the harvested straws to the rear of the threshing chamber; a partition member that partitions a processing space formed between the threshing cylinder and the screen from the sorting chamber is provided at a position on a side opposite to the threshing supply chain side in the left-right direction at a position corresponding to a front end portion of the threshing cylinder in the threshing chamber.

According to this configuration, even if straw chips such as cut straws are produced at the front portion of the threshing chamber, the straw chips are blocked by the partition member and are less likely to leak into the sorting chamber, so that the straw chips are less likely to be mixed into the fine grains.

In the present invention, it is preferable that the rear end of the partition member is connected to the mesh.

According to this configuration, when the straw chips flow from the partition member to the rear of the threshing chamber, the straw chips do not leak from between the partition member and the screen, and therefore the straw chips can be made less likely to leak into the sorting chamber.

In the present invention, it is preferable that the screen is located on an upstream side in a rotation direction of the threshing cylinder with respect to the partition member.

According to this configuration, since the grain obtained in the front portion of the threshing chamber leaks from the screen before flowing to the partition member, the straw chips generated in the front portion of the threshing chamber flow to the downstream side in the rotation direction of the threshing cylinder and are blocked by the partition member, it is possible to make the grain difficult to stay and to make the straw chips difficult to leak into the sorting chamber.

In the present invention, it is preferable that the screen is located on a downstream side in a rotation direction of the threshing cylinder with respect to the partition member.

According to this configuration, the grains caught by the partition member flow from the partition member to the downstream side in the rotation direction of the threshing cylinder, and the grains go to the screen and leak from the screen, so that the grains are less likely to be retained.

In the present invention, it is preferable that the partition member has a circular arc shape that follows the circular arc shape of the screen mesh.

According to this configuration, since the threshing process by the threshing cylinder at the position of the partition member in the threshing chamber can be performed with the same performance as the threshing process at the position of the screen by the arc shape along the arc shape of the screen of the partition member, the threshing process can be performed satisfactorily even if the partition member is present.

In the present invention, it is preferable that the screen is dividable into an upstream screen section located on an upstream side in a rotation direction of the threshing cylinder and a downstream screen section located on a downstream side in the rotation direction of the threshing cylinder, and the partition member is integrally attached to the downstream screen section.

According to this configuration, since the partition member can be attached to the threshing chamber together with the downstream-side screen part, even if the partition member is provided, the assembly can be performed efficiently.

In the present invention, it is preferable that a rear edge of the partition member is adjacent to a front edge of the downstream-side screen mesh section, and an upstream lateral edge of both lateral edges of the partition member in the rotation direction of the threshing cylinder is adjacent to a downstream lateral edge of both lateral edges of the upstream-side screen mesh section in the rotation direction of the threshing cylinder.

According to this configuration, the straw chips generated in the front portion of the upstream screen part are blocked by the partition member when flowing to the downstream side in the rotation direction of the threshing cylinder, and therefore the straw chips can be made less likely to leak into the sorting chamber. When the grain caught by the partition member flows rearward of the threshing chamber, the grain goes to the downstream-side screen part and leaks from the downstream-side screen part, so that the grain can be made difficult to accumulate.

In the present invention, it is preferable that the threshing cylinder has a truncated cone-shaped straw introduction portion at a leading end portion thereof, the size of the straw introduction portion being smaller in a radial direction toward a leading end side, and the partition member is provided at a position of the threshing chamber corresponding to the straw introduction portion.

According to this configuration, even if straw chips are generated as the grain introduction portion introduces the tip end portion, the straw chips can be blocked by the partition member, and therefore the straw chips can be made less likely to leak into the threshing chamber.

In the present invention, it is preferable that the partition member has a length in the front-rear direction of the threshing chamber longer than a front-rear length of the straw introduction portion.

According to this configuration, even if straw chips generated in the straw introduction portion flow from the straw introduction portion toward the rear of the threshing chamber, the straw chips are blocked by the partition member, and therefore the straw is less likely to leak into the sorting chamber.

Drawings

Fig. 1 is a left side view showing the whole of the combine harvester.

Fig. 2 is a longitudinal sectional side view showing the threshing device.

Fig. 3 is a front longitudinal sectional view showing the threshing device.

Fig. 4 is a plan view showing the screen and the partition member.

Fig. 5 is a perspective view showing the partition member and the front portion of the downstream screen section.

Fig. 6 is a plan view showing a partition member provided with another embodiment.

Description of the reference numerals

10: threshing chamber

11: threshing cylinder

11A: straw leading-in part

15: screen mesh

15A: upstream side screen section

15B: downstream screen section

25: threshing supply chain

26: partition member

26R: rear end part

40: sorting chamber

57: horizontal edge part (horizontal frame)

58: rear edge part (reinforcing plate)

61: front edge part (Beam)

62: horizontal edge part (horizontal frame)

L1: length of the partition member

L2: length of straw inlet

Detailed Description

Hereinafter, embodiments as examples of the present invention will be described with reference to the drawings.

Note that, in the following description, regarding the traveling machine body of the combine harvester, the direction of arrow F shown in fig. 1 is referred to as "machine body front", the direction of arrow B is referred to as "machine body rear", the direction of arrow U is referred to as "machine body upper", the direction of arrow D is referred to as "machine body lower", the direction on the front side of the paper surface is referred to as "machine body left", and the direction on the back side of the paper surface is referred to as "machine body right".

[ regarding the entirety of the combine ]

As shown in fig. 1, a travel machine body of a combine harvester includes a machine body frame 1 configured by connecting a plurality of steel materials such as square pipe materials. A pair of right and left crawler type traveling devices 2 is provided at a lower portion of the machine body frame 1. A cab 3 is formed at a laterally right portion of the front portion of the travel machine body. The driving unit 3 is provided with a booth 3a covering the boarding space. A harvesting and conveying device 4 is arranged at the front part of the traveling machine body in a lifting way. The harvesting and conveying device 4 includes a harvesting portion 4A and a supply and conveying portion 4B, the harvesting portion 4A lifts up the standing grain stalks of rice or wheat in a plurality of planting rows by a grain lifting device 5 in front of the traveling body and harvests the standing grain stalks by a harvesting device 6, and the supply and conveying portion 4B conveys the harvested grain stalks harvested by the harvesting portion 4A rearward. The threshing device 7 and the grain tank 8 are supported at the rear of the machine body frame 1 in a horizontally juxtaposed state. The threshing device 7 is disposed behind the supply and transport unit 4B, and the grain tank 8 is disposed behind the drive unit 3. The threshing device 7 performs a threshing process of the harvested grain stalks conveyed by the supply conveyor 4B, and a sorting process of sorting the threshed grains and dust obtained by the threshing process. The grain tank 8 stores grains fed from the threshing device 7. A grain discharging device 9 for taking out grains from the grain tank 8 is connected to the rear part of the grain tank 8.

[ threshing device ]

In describing the threshing device 7 and the threshing cylinder 11, the processing start end side [ the straw insertion side (left side of the sheet of fig. 2) ] of the threshing device 7 and the threshing cylinder 11 is referred to as "front", and the processing end side [ the straw discharge side (right side of the sheet of fig. 2) ] of the threshing device 7 and the threshing cylinder 11 is referred to as "rear".

As shown in fig. 2, the threshing device 7 includes a threshing section 7A provided at an upper portion of the threshing device 7 and a sorting section 7B provided at a lower portion of the threshing device 7.

As shown in fig. 2 and 3, the threshing unit 7A includes a threshing chamber 10. A threshing cylinder 11 for threshing the harvested grain stalks is provided in the threshing chamber 10. The threshing cylinder 11 is rotatably driven in a rotation direction Z indicated by an arrow in fig. 3 around an axis P of the threshing cylinder support shaft 12 extending in the front-rear direction of the threshing device 7. The threshing cylinder 11 includes a grain and straw introduction part 11A provided at a front end part 11F of the threshing cylinder 11 and a threshing processing part 11B provided at a part of the threshing cylinder 11 on the rear side of the grain and straw introduction part 11A. The straw introduction portion 11A is formed in a truncated cone shape whose radial dimension decreases toward the tip end side. A plurality of combing teeth 13 are provided on the outer peripheral portion of the straw introduction portion 11A, and the plurality of combing teeth 13 are arranged at intervals in the circumferential direction of the straw introduction portion 11A. A plurality of threshing teeth 14 are provided on the outer periphery of the processing unit 11B, and the plurality of threshing teeth 14 are arranged in the circumferential direction of the threshing processing unit 11B and in the longitudinal direction of the threshing processing unit 11B. A screen 15 is provided around the outer side of the lower part of the threshing cylinder 11. Threshing chamber 10 is formed by front wall 16, rear wall 17, upper lip 19, lower lip 20, roof 21, and screen 15. In the front of the threshing chamber 10, an inlet 22 for inserting the tip end side portion of the harvested straw into the threshing chamber 10 is formed. A dust sending port 23 for discharging the threshing exhaust stalks, the stalk chips, etc. to the rear of the threshing chamber 10 is formed at the rear of the threshing chamber 10.

As shown in fig. 3, at the lateral side of the threshing chamber 10, a threshing opening 24 is formed by the upper lip 19 and the lower lip 20. The threshing opening 24 is formed to extend in the front-rear direction of the threshing chamber 10. A threshing supply chain 25 is provided on the lateral side of the threshing chamber 10 on the threshing opening side, in a state of extending in the front-rear direction of the threshing chamber 10. As shown in fig. 3 and 4, a partition member 26 is provided at a position 10a on the opposite side to the threshing supply chain side in the left-right direction at a position corresponding to the front end portion 11F of the threshing cylinder 11 in the threshing chamber 10. The processing space formed between the threshing cylinder 11 and the screen 15 and the sorting chamber 40 of the sorting section 7B are partitioned by the partition member 26. As shown in fig. 3, the partition member 26 is formed in an arc shape along the arc shape of the screen 15 so that the threshing process by the threshing cylinder 11 at the position of the partition member 26 in the threshing chamber 10 is performed with the same threshing performance as the threshing process by the threshing cylinder 11 at the position of the screen 15 in the threshing chamber 10.

In the threshing section 7A, the stem root side portion of the harvested straw conveyed by the supply conveyor 4B is supplied to a threshing supply chain 25, and is nipped and conveyed by the threshing supply chain 25 toward the rear of the threshing chamber 10. As the root side portion of the stalk is gripped and conveyed, the tip portion of the harvested stalk is guided to the inlet 22 by the inlet bottom plate 27 (see fig. 2) and inserted into the threshing chamber 10 through the inlet 22. In the straw introduction part 11A, the tip part of the ear inserted into the threshing chamber 10 is combed by the combing teeth 13 and is pushed backward, and is introduced into the threshing processing part 11B, and the threshing processing part 11B performs threshing processing on the tip part of the ear. Straw chips such as long cut straws are likely to be produced on the tip end side portions of the straw introduction portion 11A and the threshing processing portion 11B, which are subjected to the plunging and threshing, but the produced straw chips are blocked by the partition member 26, and the threshing processing is performed on the premise that the partition member 26 suppresses the straw chips from leaking into the sorting chamber 40. The side of the ear tip introduced into the threshing processing section 11B is subjected to threshing processing by the threshing teeth 15 and the screen 15 while being transferred to the rear of the threshing chamber 10. The threshed grains obtained by the threshing process leak down to the sorting chamber 40 through the processed matter leakage holes of the screen 15. The dust such as the threshed straw chips and chips generated by the threshing process is discharged to the rear of the threshing chamber 10 through the dust sending port 23. The grains mixed with the straw chips and the like discharged from the threshing chamber 10 are pulled out by the separation drum 28 (see fig. 2), and the pulled-out grains fall into the sorting chamber 40. The threshed straw chips discharged from the threshing chamber 10 are supplied to the straw chip conveyor 29 by the threshing supply chain 25, and are conveyed rearward by the straw chip conveyor 29. When the straw chip inlet 31 of the straw chip shredder 30 provided at the rear of the thresher 7 is opened, the threshed straw chips fall from the straw chip conveyor 29 to the straw chip inlet 31, and the threshed straw chips are shredded in the body direction by the straw chip shredder 30 and discharged into the field. When the straw chip inlet 31 of the straw chip shredder 30 is closed by the cover 32, the threshed straw chips fall from the straw chip conveyor 29 onto the cover 32, and the threshed straw chips are guided by the cover 32 to fall behind the straw chip shredder 30 and are discharged to the rear of the traveling machine body in a long straw state.

As shown in fig. 2, the sorting section 7B has a sorting chamber 40 provided below the screen 15. The sorting chamber 40 is provided with a swing sorting device 41, and the swing sorting device 41 receives threshed processed objects such as grains falling from processed object dropping holes of the screen 15 and sorts the received grains and dust. The swing sorting apparatus 41 can be operated to swing by a drive mechanism 42 provided at the rear of the swing sorting apparatus 41. The swing sorting device 41 includes a grain shaking plate 43, an upper sieve 44, a lower sieve 45, and a straw sieve 46. A winnowing machine 47 is provided below the front end of the swing sorting device 41. A first air supply device 48 is arranged in front of the winnowing machine 47. A second air supply device 49 is arranged behind the winnowing machine 47. The winnowing machine 47 supplies separation air which passes through the lower screen 45, the upper screen 44 and the straw screen 46 from below to above and is directed to the rear upper side of the separation chamber 40. The first air blowing device 48 supplies the sorting air which swings the sorting device 41 from the front lower side of the upper screen 44 to the rear upper side thereof. The second air blowing device 49 supplies the sorting air which passes through the straw screen 46 from below to above and toward the rear upper side of the swing sorting device 41.

The refined grains of the grains sorted by the swing sorting device 41 flow down to the first auger 50 provided below the middle portion of the swing sorting device 41, and are conveyed to the lateral outside of the threshing device 7 by the first auger 50. The fine grains conveyed by the first auger 50 are supplied to the grain tank 8 by a winnowing device 51 connected to the conveyance terminating end of the first auger 50. The untreated grains among the grains sorted by the swing sorting device 41 flow down to the second auger 52 provided below the rear portion of the swing sorting device 41, and are conveyed to the lateral outside of the threshing device 7 by the second auger 52. The sorted air supplied from the second air supply device 49 passes through the upper part of the second auger 52. The untreated pellets conveyed by the second auger 52 are returned to the starting portion of the swing sorting device 41 by a returning device 53 connected to the conveyance terminating end portion of the second auger 52. The dust sorted by the swing sorting device 41 is sucked into the dust exhaust fan 33 together with the sorting wind, and is discharged from the dust exhaust fan 33 to the outside of the thresher 7.

[ concerning the partition member ]

As shown in fig. 3 and 4, the partition member 26 is provided at a position 10a on the opposite side to the threshing supply chain side in the left-right direction at a position corresponding to the front end portion 11F of the threshing cylinder 11 in the threshing chamber 10. The partition member 26 partitions a processing space formed between the threshing cylinder 11 and the screen 15 and the sorting chamber 40. Straw chips such as growing straw chips are likely to be generated on the ear tip side portion subjected to the plunging-in treatment and the threshing treatment by the front end portions of the straw introduction portion 11A of the threshing cylinder 11 and the threshing treatment portion 11B of the threshing cylinder 11, respectively, but the generated straw chips are blocked by the partition member 26 and are less likely to leak into the threshing chamber 10.

As shown in fig. 4, the rear end portion 26R of the partition member 26 is connected to the mesh 15. Even if straw chips flow from the partition member 26 to the rear of the threshing chamber 10, they do not leak between the partition member 26 and the screen 15. The screen 15 is disposed on the upstream side of the partition member 26 in the rotation direction of the threshing cylinder. The grains obtained at the front of the threshing chamber 10 leak down from the screen 15 before flowing to the partition member 26, and the straw chips generated at the front of the threshing chamber 10 flow from the generation position to the downstream side in the rotation direction of the threshing cylinder and are received by the partition member 26.

Specifically, as shown in fig. 3 and 4, a dividing line Y extending in the front-rear direction of the screen 15 is provided at an intermediate portion of the screen 15 in the left-right direction. The screen 15 is divided by a dividing line Y into an upstream screen part 15A located on the upstream side in the rotation direction of the threshing cylinder and a downstream screen part 15B located on the downstream side in the rotation direction of the threshing cylinder. The member 54 shown in fig. 4 is a coupling member that couples the front end portion of the upstream screen section 15A and the front wall section 16.

As shown in fig. 4 and 5, the partition member 26 includes a first partition portion 26A and a second partition portion 26B provided between the front end portion of the first partition portion 26A and the front wall portion 16. The first partition 26A includes a main body 55 formed of a plate member, a front frame 56 connected to the front portion of the main body 55, and a lateral frame 57 connected to both lateral edges of the main body 55 in the rotation direction of the threshing cylinder. The main body portion 55 and the front frame portion 56 are joined by welding. The left and right lateral frame portions 57 and the main body portion 55 are connected by welding. The second partition 26B is detachably connected to the front wall 16 by a connecting bolt. The front frame portion 56 and the second partition portion 26B are detachably connected by the support rail portion 34 that supports the front frame portion 56 to the second partition portion 26B. A reinforcing plate 58 is provided at the rear end of the main body 55. The reinforcing plate 58 and the main body 55 are joined by welding. Reinforcing bars 59 are provided at two positions in the left-right direction on the back side of the main body 55. Each reinforcement bar 59 is connected to the front frame portion 56 and the reinforcement plate 58. The reinforcing bar 59 and the front frame 56 are joined by welding. The reinforcing bar 59 and the reinforcing plate 58 are joined by welding.

The left and right lateral frame portions 57 are integrally formed with a lateral frame portion 60 of the downstream screen portion 15B, the reinforcing plate 58 is connected to a foremost lateral beam 61 of the downstream screen portion 15B by welding, and the partition member 26 is integrally attached to the downstream screen portion 15B. The second partition 26B is supported by the front wall 16 via a connecting bolt, and the partition 26 is supported by the front wall 16 and the downstream screen section 15B. In a state where the partition member 26, the downstream-side screen mesh portion 15B, and the upstream-side screen mesh portion 15A are assembled in the threshing device 7, the reinforcement plate 58 as the rear edge portion of the partition member 26 is adjacent to the cross member 61 as the front edge portion of the downstream-side screen mesh portion 15B, and the transverse frame portion 57 on the upstream side in the rotation direction of the threshing cylinder among the two transverse frame portions 57 as the both transverse edge portions in the rotation direction of the threshing cylinder of the partition member 26 is adjacent to the transverse frame portion 62 on the downstream side in the rotation direction of the threshing cylinder among the two transverse frame portions 62 as the both transverse edge portions in the rotation direction of the threshing cylinder of the front end portion of the upstream-side screen mesh portion 15A. The grains obtained at the front of the threshing chamber 10 leak down from the upstream-side screen part 15A before flowing to the partition member 26, and the straw chips generated at the front of the threshing chamber 10 flow to the downstream side in the rotation direction of the threshing cylinder and are blocked by the partition member 26. The grains caught by the partition member 26 leak down from the downstream-side screen part 15B when flowing rearward of the threshing chamber 10.

As shown in fig. 4, the partition member 26 is provided at a position corresponding to the straw introduction portion 11A in the threshing chamber 10 at the second partition portion 26B. The length L1 of the partition member 26 in the front-rear direction of the threshing chamber is set to be longer than the front-rear length L2 of the straw inlet 11A. The partition member 26 can prevent the straw chips from leaking into the sorting chamber 40 at a portion of the threshing chamber 10 corresponding to the front end portion 11F of the threshing cylinder 11.

< other embodiment >

(1) Fig. 6 is a plan view showing a partition member 26 according to another embodiment. In the partition member 26 according to another embodiment, the screen 15 is provided at a position downstream of the partition member 26 in the rotation direction of the threshing cylinder. Specifically, the front side portion of the downstream-side screen section 15B is located on the downstream side in the rotation direction of the threshing cylinder with respect to the partition member 26.

(2) In the above embodiment, the example in which the partition member 26 is integrally attached to the downstream screen part 15B is shown, but the present invention is not limited thereto. For example, the partition member 26 and the mesh 15 may be separable. Further, the partition member may be detachably supported at a portion of the screen 15 having the cross member and the side member, and the screen 15 may be configured to be changeable between a state with the partition member 26 attached and a state without the partition member 26.

(3) In the above embodiment, the example in which the partition member 26 is constituted by the first partition portion 16A and the second partition portion 16B is shown, but the present invention is not limited thereto. For example, the entire partition member may be formed of a single member, or may be formed of three or more partitions.

(4) In the above embodiment, the screen 15 is divided into the upstream screen part 15A and the downstream screen part 15B, but may be configured not to be divided.

(5) In the above embodiment, the example in which the partition member 26 is formed in the circular arc shape along the circular arc shape of the mesh 15 is shown, but the present invention is not limited thereto. For example, the partition member 26 may be a multi-stage bent shape bent at a plurality of positions in the circumferential direction of the threshing cylinder.

Industrial applicability

The present invention can be applied to a threshing device having a threshing chamber into which an ear tip side portion of a harvested grain stalk is inserted, a threshing cylinder that threshes the ear tip side portion inserted into the threshing chamber, a screen provided around the outer side below the threshing cylinder, a sorting chamber that sorts threshing grains and dust that have leaked from the screen, and a threshing supply chain that holds and conveys the stem root side portion of the harvested grain stalk to the rear of the threshing chamber.

Claims

1. A threshing apparatus comprising:

a threshing chamber into which a tip side part of the harvested grain stalks is inserted;

a threshing cylinder provided in the threshing chamber and threshing an ear tip side part inserted into the threshing chamber;

a screen disposed around an outer side of a lower portion of the threshing cylinder;

a separation chamber provided below the threshing chamber and separating the grains and dust leaked from the screen mesh;

a threshing supply chain extending in the front-rear direction of the threshing chamber on the lateral side of the threshing chamber and clamping and conveying the parts of the stalks and roots of the harvested straws to the rear of the threshing chamber;

a partition member that partitions a processing space formed between the threshing cylinder and the screen from the sorting chamber is provided at a position on a side opposite to the threshing supply chain side in the left-right direction at a position corresponding to a front end portion of the threshing cylinder in the threshing chamber.

2. Threshing apparatus according to claim 1,

the rear end of the partition member is connected to the screen.

3. Threshing device according to claim 1 or 2,

the screen is located on the upstream side in the rotation direction of the threshing cylinder with respect to the partition member.

4. Threshing device according to any of claims 1 to 3,

the screen is located on the downstream side in the rotation direction of the threshing cylinder with respect to the partition member.

5. Threshing device according to any of the claims 1 to 4,

the partition member has an arc shape that follows the arc shape of the screen.

6. Threshing device according to any of the claims 1 to 5,

the screen can be divided into an upstream side screen part positioned at the upstream side of the rotation direction of the threshing cylinder and a downstream side screen part positioned at the downstream side of the rotation direction of the threshing cylinder,

the partition member is integrally attached to the downstream-side screen section.

7. Threshing apparatus according to claim 6,

the rear edge portion of the partition member is adjacent to the front edge portion of the downstream-side screen section,

the partition member has a transverse edge on the upstream side in the rotation direction of the threshing cylinder among the two transverse edges in the rotation direction of the threshing cylinder adjacent to a transverse edge on the downstream side in the rotation direction of the threshing cylinder among the two transverse edges in the rotation direction of the threshing cylinder at the front end of the upstream screen section.

8. Threshing device according to any of the claims 1 to 7,

a truncated cone-shaped straw introduction part having a smaller radial dimension toward the front end side is provided at the front end part of the threshing cylinder,

the partition member is provided at a position of the threshing chamber corresponding to the straw introduction portion.

9. Threshing apparatus according to claim 8,

the length of the partition member in the front-rear direction of the threshing chamber is longer than the front-rear length of the grain and straw introduction part.