JP2022010722A - Thresher - Google Patents

Abstract

To provide a thresher capable of preventing threshed objects located between lateral sides of a sieve case and threshing side walls, from leaking out rearward from a rear end of the sieve case.SOLUTION: A thresher comprises: a threshing section 20 for threshing loaded crops; a selecting section 21 provided on a lower side of the threshing section 20 and selecting threshed objects obtained from the threshing section 20; and left/right lateral walls located both left/right of the threshing section 20 and the selecting section 21. The selecting section 21 includes a sieve case 30 swingingly selecting the threshed objects, while rearward transferring them, by swinging drive. The sieve case 30 includes a guide section 56 on an upper side of lateral sides thereof, for guiding the threshed objects located between the lateral sides and the threshing side walls, toward a longitudinal central side of the sieve case 30.SELECTED DRAWING: Figure 2

Description

The present invention relates to a threshing device.

Conventionally, as a threshing device, for example, the threshing device described in Patent Document 1 is known. The threshing device described in Patent Document 1 includes a threshing section for threshing the introduced crop, a sorting section provided below the threshing section for sorting the threshed product obtained from the threshing section, a threshing section, and sorting. Left and right threshing side walls located on the left and right sides of the section are provided. The sorting unit is provided with a sheave case for rocking and sorting while transferring the threshed product to the rear by rocking drive. A side cover is provided on the outer side of the sheave case in the left-right direction to cover between the lateral portion of the sheave case and the threshing side wall portion. The rear ends of the left and right side covers are bent inward in the left-right direction to prevent the threshed product that is placed on the side covers and rolled backwards from leaking out from the rear ends of the sheave case. Has been done.

Japanese Unexamined Patent Publication No. 2020-43778

However, in the threshing device described in Patent Document 1, the portion of the left and right side covers that is bent inward in the left-right direction is the rear end portion of the left and right sheave cases. Therefore, the threshing product that moves rearward between the lateral side of the sheave case and the threshing side wall may leak out from the rear end of the sheave case without falling into the sheave case. rice field.

Therefore, in view of the above problems, the present invention can prevent the threshed product located between the lateral side portion of the sheave case and the threshing side wall portion from leaking to the outside from the rear end portion of the sheave case. It is an object of the present invention to provide a threshing device capable.

The threshing device of the present invention includes a threshing section for threshing the introduced crop, a sorting section provided below the threshing section for sorting the threshed product obtained from the threshing section, the threshing section, and the above. The sorting section is provided with left and right threshing side walls located on both the left and right sides of the sorting section, and the sorting section is provided with a sheave case for rocking and sorting while transferring the threshed product to the rear by rocking drive. Above the side portion, a guide portion for guiding the threshed product located between the lateral portion and the threshing side wall portion toward the central portion in the left-right direction of the sheave case is provided.

According to this configuration, the threshed product that moves rearward between the lateral portion of the sheave case and the threshing side wall portion is guided toward the central portion in the left-right direction of the sheave case by the guide portion, and the sheave case is used. Fall inside. As a result, it is possible to prevent the threshed product located between the lateral side portion of the sheave case and the threshing side wall portion from leaking to the outside from the rear end portion of the sheave case.

In the present invention, the threshing section is provided with a handling cylinder for threshing crops by rotational drive and a receiving net provided on the outer periphery of the lower portion of the handling cylinder, and the guide portion is described in the front-rear direction. It is preferable that the net is provided at a position rearward from the rear end portion of the net.

According to this configuration, the threshed product leaked from the receiving net moves rearward between the lateral portion of the sheave case and the threshing side wall portion without falling into the sheave case. However, the guide portion guides the sheave case toward the center portion in the left-right direction and falls into the sheave case. Therefore, it is possible to prevent the threshed product leaked from the receiving net from leaking to the outside from the rear end portion of the sheave case.

In the present invention, the handling cylinder extends to the rear side from the rear end portion of the receiving net, and the guide portion is located at a position rearward from the end portion of the handling cylinder in the front-rear direction. It is preferable that it is provided.

According to this configuration, the threshed product that has been threshed by the handling cylinder moves rearward between the lateral portion of the sheave case and the threshing side wall portion without falling into the sheave case. However, the guide portion guides the sheave case toward the center portion in the left-right direction and falls into the sheave case. Therefore, it is possible to prevent the threshed product that has been threshed by the handling cylinder from leaking to the outside from the rear end portion of the sheave case.

In the present invention, a separation drum for separating the cut straw and the grain while diffusing the threshed product is provided above the sheave case behind the handling cylinder, and the guide portion is the separation in the front-rear direction. It is preferable that the drum is provided at a position rearward from the drum.

According to this configuration, the grains separated from the cut straw by the separation drum move backward between the lateral portion of the sheave case and the threshing side wall portion without falling into the sheave case. Even so, the guide portion guides the sheave case toward the center in the left-right direction and falls into the sheave case. Therefore, it is possible to prevent the grains separated from the cut straw by the separation drum from leaking to the rear of the sheave case.

In the present invention, the dust exhaust port for discharging the exhaust straw transferred by the sheave case to the outside of the device is provided, and the dust exhaust port is opened by swinging above the rear end portion of the sheave case. It is preferable that the guide portion is provided at a position in front of the shutter portion in a state where the opening degree of the dust exhaust port is minimized in the front-rear direction.

According to this configuration, the guide portion can be prevented from interfering with the shutter portion in a state where the opening degree of the dust discharge port is minimized.

In the present invention, a screw-type first item collecting unit for collecting the selected first item and a second item provided behind the first item collection unit and selected below the sheave case. It is equipped with a screw-type second item collection unit that collects objects, and is provided with a downwardly constricted inclined portion having the second item collection unit as the lowermost end in a side view before and after the second item collection unit. It is preferable that the guide portion is provided at a position within the existence range of the inclined portion in the front-rear direction.

According to this configuration, the threshed product located between the lateral side portion of the sheave case and the threshing side wall portion is guided toward the central portion in the left-right direction of the sheave case by the guide portion, and is second from the inside of the sheave case. It falls into the object collection section. Therefore, the threshed product located between the lateral portion of the sheave case and the threshing side wall portion can be collected in the second product collection unit.

In the present invention, a gap filling member having flexibility and filling a gap between the upper end portion of the lateral side portion and the threshing side wall portion is provided, and the guide portion is provided on the gap filling member. It is preferable that it is used.

According to this configuration, the threshing processed product can be prevented from leaking from the gap between the upper end portion of the lateral side portion of the sheave case and the threshing side wall portion by the gap filling member. Further, the threshed product on the gap filling member can be guided toward the center portion in the left-right direction of the sheave case by the guide portion and dropped into the sheave case.

In the present invention, it is preferable that the guide portion is provided with an extending portion extending from the lateral portion toward the center portion in the left-right direction of the sheave case and extending below the upper end portion of the lateral portion. Is.

According to this configuration, the threshed product that moves rearward between the lateral portion of the sheave case and the threshing side wall portion is moved to the central portion in the left-right direction of the sheave case with respect to the lateral portion by the extension portion. It is guided toward and toward the lower side of the upper end of the lateral side. As a result, the threshed product that moves rearward between the lateral side portion of the sheave case and the threshing side wall portion is reliably guided toward the central portion in the left-right direction of the sheave case, and is surely inside the sheave case. Can be dropped into.

In the present invention, it is preferable that the guide portions are provided at a plurality of locations in the front-rear direction.

According to this configuration, a plurality of guide portions are provided on the movement path of the threshing processed product that moves rearward between the lateral portion of the sheave case and the threshing side wall portion. Therefore, the threshing process is performed. It is possible to reliably guide an object toward the center side in the left-right direction of the sheave case.

In the present invention, it is preferable that the guide surface in the guide portion is configured to have an inclined shape located on the rear side toward the central portion in the left-right direction of the sheave case.

According to this configuration, the threshed product that moves rearward between the lateral portion of the sheave case and the threshing side wall portion is guided toward the central portion in the left-right direction of the sheave case without obstructing the flow. be able to.

It is a left side view showing a head-feeding combine. It is a left side sectional view which shows the threshing apparatus. It is a top view which shows the structure of a sheave case. It is a front sectional view which shows the structure of a sheave case. It is a front sectional view which shows the structure of the sheave case of another embodiment.

Hereinafter, a case where the embodiment of the threshing apparatus according to the present invention is applied to a head-feeding combine will be described with reference to the drawings. In this embodiment, when defining the front-rear direction of the traveling aircraft of the combine, it is defined along the traveling direction of the aircraft in the working state, and when defining the left-right direction of the aircraft, it is left and right as viewed from the traveling direction of the aircraft. Is defined. That is, the direction indicated by the reference numeral (F) in FIG. 1 and the like is the front side of the aircraft, the direction indicated by the reference numeral (B) is the rear side of the aircraft, the direction indicated by the reference numeral (L) is the left side of the aircraft, and the direction indicated by the reference numeral (R) is the right side of the aircraft. Is.

[Overall configuration]
As shown in FIG. 1, the head-feeding combine includes an airframe frame 1 and a traveling device 2 that supports the airframe frame 1. A cabin 3 is provided on the right side of the front part of the aircraft. The cabin 3 includes a driving unit 4 on which the driver is boarded. An engine (not shown) is provided below the driving unit 4.

In front of the cabin 3, a cutting section 5 for cutting the planted culm is provided. The cutting unit 5 is configured to have a plurality of cutting specifications (for example, six-row cutting specifications). A grain storage tank 6 for storing grains is provided behind the cabin 3. A grain discharge device 7 for discharging grains in the grain storage tank 6 is provided. To the left of the grain storage tank 6, a threshing device 9 for threshing the cut grain culms transported by the sandwiching and transporting mechanism 8 is provided. A straw-removing transport mechanism 11 is continuously provided on the rear side of the threshing device 9. The straw-removing transport mechanism 11 receives the threshed straw after the threshing process from the pinching and transporting mechanism 8 and pinches and transports it backward. A straw cutting device 12 for cutting the waste straw transported by the straw transport mechanism 11 is provided below the transport end side portion of the straw transport mechanism 11.

[About threshing equipment]
As shown in FIG. 2, the threshing device 9 is provided below the threshing section 20 and the threshing section 20 for threshing the crops input from the harvesting section 5, and conveys the threshed product obtained from the threshing section 20. A sorting unit 21 for sorting while performing the sorting process is provided. The threshing device 9 is provided with left and right threshing side wall portions 23 (see FIG. 3) located on the left and right sides of the threshing section 20 and the sorting section 21.

The threshing section 20 includes a pinching and transporting mechanism 8 having a feed chain 8a including an endless rotating chain with protrusions for pinching and transporting the harvested culms transported from the harvesting section 5 toward the rear, and rotation along the front-rear direction. A drum-type handling cylinder 25 is provided which handles the tip side of the cut grain culm that is rotationally driven around the shaft core Y and is sandwiched and transported by the sandwiching and transporting mechanism 8 to perform threshing processing. Further, on the outer periphery of the lower portion of the handling cylinder 25, a receiving net 26 for receiving and leaking the threshed product processed by the handling cylinder 25 is provided. The handling cylinder 25 is extended to the rear side of the rear end portion of the receiving net 26.

The threshed product separated from the cut grain culm by the handling cylinder 25 is supplied to the sorting unit 21 by leaking the receiving net 26. On the other hand, the waste straw of the harvested grain culm after the threshed product is separated by the handling cylinder 25 is handed over from the sandwiching and transporting mechanism 8 to the straw discharging transport mechanism 11 for transporting the threshed waste after the threshing treatment. It is discharged toward.

The sorting unit 21 includes a swinging sorting device 27 that swings and sorts the threshed product supplied from the threshing section 20, a main wall insert 28 provided below the front of the swing sorting device 27, and a front of the main wall insert 28. At the lower wall insert 29 provided above, the screw-type first item collecting unit 45 that is provided below the sheave case 30 and collects the first item that has flowed down from the grain sheave 38 of the sorting unit 21, and below the grain sheave 38. A screw-type second product collection unit 46, which is provided behind the first product collection unit 45 and collects the selected second product, is provided in the grain receive 38 of the sorting unit 21.

The main wall insert 28 supplies the sorting wind to the lower precision sorting region and the like in the rocking sorting device 27. The sub wall insert 29 supplies the sorting wind to the upper rough sorting region in the rocking sorting device 27.

The rocking sorting device 27 includes a frame-shaped sheave case 30 formed in a rectangular shape in a top view, a first grain pan 31 for rough sorting, a plurality of first sieve lines 32, and a second grain pan 33 for rough sorting. , A plurality of second sieve lines 34, a chaff sheave 35 for rough sorting, a straw rack 36 for rough sorting, a guide plate 37 in a backward inclined posture, and a grain sheave 38 for fine sorting. An eccentric cam type drive unit 39 for swinging and driving the sheave case 30 is provided at the rear portion of the sheave case 30. Above the rear end portion of the sheave case 30, a dust discharge port 52 for discharging the exhaust straw transferred by the sheave case 30 to the outside of the device is provided.

The first Glenpan 31 is arranged on the front side of the rough sorting region in the sheave case 30. The first Glenpan 31 transfers the threshed product leaked from the front side of the receiving net 26 to the rear while sorting by specific gravity difference.

The plurality of first sieve lines 32 extend rearward and upward from the rear end portion of the first Glenpan 31 in a state of being spaced apart from each other in the left-right direction. The plurality of first sieve lines 32 supply the threshed product from the first Glenpan 31 to the front end portion of the lower chaff sheave 35 while unraveling the threshed product.

The second Glenpan 33 is arranged on the rear side of the rough sorting region in the sheave case 30 and below the dust transmission port 51. The second Glenpan 33 transfers the threshed product from the dust outlet 51 to the rear while sorting by the difference in specific density.

The plurality of second sieve lines 34 extend rearward from the rear end portion of the second Glenpan 33 with a certain interval in the left-right direction. The plurality of second sieve lines 34 supply the rear end portion of the lower chaff sheave 35 and the straw rack 36 while unraveling the threshed product from the second Glenpan 33.

The chaff sheave 35 is arranged below the first grain pan 31 in the rough sorting region of the sheave case 30 on the rear side (downstream side in the transport direction). The chaff sheave 35 sifts and sorts the threshed product from the plurality of first sieve lines 32, the threshed product leaked from the rear side of the receiving net 26, and the threshed product from the plurality of second sieve lines 34. Transfer to the rear.

The chaff sheave 35 is configured so that the opening degree can be adjusted. The chaf sheave 35 is provided with a plurality of chaflip plates 42 that are aligned and arranged at predetermined intervals in the front-rear direction so as to be swingable in the front-rear direction (transport direction), and integrally swing to change the posture. ing.

The straw rack 36 is arranged in a state of being connected to the chaff sheave 35 on the rear side of the chaff sheave 35 in the rough sorting region of the sheave case 30. The straw rack 36 transfers the threshed product from the plurality of second sieve lines 34 and the threshed product from the chaff sheave 35 to the rear while sieving and sorting, and does not leak long shredded culms and the like (exhaust). The straw) is discharged to the outside of the machine from the dust discharge port 52 provided behind the swing sorting device 27.

At a position immediately before the transport direction of the chaf sheave 35 below the first grain pan 31, the first sorting wind that allows the sorting wind from the wall insert 29 to flow in the air passage between the first grain pan 31 and the chaf sheave 35, and the chaf sheave 35. A second sorting wind that flows in the air passage between the guide plate 37 and a fluid 41 that divides vertically are arranged.

The guide plate 37 is arranged on the front side of the fine sorting region in the sheave case 30. The guide plate 37 guides the threshed product leaking from the front side of the chaf sheave 35 to the rear side.

The Glen Sheave 38 is located on the rear side of the fine sorting region in the Sheave Case 30. The grain sheave 38 transfers the threshed product leaked from the rear side of the chaf sheave 35 and the threshed product flowed down by the guide plate 37 to the rear while sorting by sieving.

Above the sheave case 30 behind the handling cylinder 25, the separation drum 43 is rotatably arranged around the drum axis in a posture along the left-right direction of the machine body. The separation drum 43 separates the cut straw and the grains while diffusing the threshed product discharged from the dust outlet 51.

A dust exhaust fan 44 for discharging dust to the outside is provided behind the separation drum 43. The dust exhaust fan 44 sucks culms and the like carried by wind power upward and backward by the sorting wind from the main wall insert 28 and the sub wall insert 29 and discharges them to the outside of the machine.

With the above configuration, in the sorting unit 21, the threshed product from the threshing unit 20 is supplied to the first product (single grain) flowing down from the grain sheave 38 and the second product supplied to the rear of the grain sheave 38 (single grain). It can be accurately sorted into stalk-attached grains, bifurcated grains, etc.) and the third product (sliced culm, culm, etc.) discharged to the outside of the machine from the dust outlet 52.

Before and after the first object collecting portion 45, a first inclined portion 47 having a lower constriction shape with the first object collecting portion 45 as the lowermost end is provided in a side view. At the right end of the first item collection unit 45, the first item transported by the first item collection unit 45 is lifted and supplied to the grain storage tank 6 in conjunction with the first item collection unit 45. The lifting conveyor 61 is continuously installed. The first item collection unit 45 transports the collected first item to the right.

A second inclined portion 48 (“inclined portion” of the present invention) having a downward constriction shape having the second object collecting portion 46 as the lowermost end is provided in front of and behind the second object collecting portion 46. The second item collection unit 46 conveys the collected second item to the right. At the right end of the second product collection unit 46, there is a second reduction device 62 that reduces the second product after shredding by the second processing cylinder to the sorting unit 21 in conjunction with the second product collection unit 46. Are serially installed.

The dust exhaust port 52 is provided with a shutter portion 53 for adjusting the opening degree of the dust exhaust port 52. The shutter portion 53 is configured as a swing-type lid, and swings according to the amount of discharged straw. When the amount of waste disposal is large, the shutter unit 53 is pushed by the straw to increase the opening degree, and when the amount of straw discharge processing is small, the opening degree is small and the grain leaks out of the machine. To prevent.

[About gap filling members]
As shown in FIGS. 2 and 3, a gap filling member 54 is provided on the outer side of the sheave case 30 in the left-right direction. The gap filling member 54 is made of a flexible resin plate-shaped member. The gap filling member 54 extends in the front-rear direction and is provided so as to fill the gap between the upper end portion of the lateral portion 30a of the sheave case 30 and the threshing side wall portion 23 from the front end to the rear end of the sheave case 30. ing. The gap filling member 54 is attached to the left and right lateral portions 30a of the sheave case 30.

As shown in FIG. 4, the gap filling member 54 is attached to the upper end of the lateral portion 30a of the sheave case 30 by bolts and nuts via a stay 55. The gap filling member 54 protrudes outward in the left-right direction from the lateral side portion 30a and is in contact with the threshing side wall portion 23.

[About the guide section]
As shown in FIGS. 3 and 4, a threshed product located between the lateral portion 30a of the sheave case 30 and the threshing side wall portion 23 is placed on the left and right gap filling members 54 in the left-right direction of the sheave case 30. A guide portion 56 for guiding toward the center side is provided. One guide portion 56 is provided on each of the left and right gap filling members 54.

In the present embodiment, the guide portion 56 is composed of a plate-shaped member. The guide portion 56 is provided between the upper edge portion of the lateral portion 30a of the sheave case 30 and the threshing side wall portion 23. The edge portion of the guide portion 56 facing the gap filling member 54 is formed in a shape (substantially arcuate shape) along the upper surface of the gap filling member 54. The upper end of the guide portion 56 does not protrude above the upper end of the gap filling member 54. The lateral inner end of the guide portion 56 does not protrude from the lateral inner end of the stay 55 toward the center portion side in the left-right direction of the sheave case 30.

As shown in FIG. 3, the guide portion 56 is welded and fixed to the stay 55 in a state of being inclined so as to be located on the rear side toward the central portion in the left-right direction of the sheave case 30. As shown in FIG. 2, the guide portion 56 is provided at a position rearward of the rear end portion of the receiving net 26 in the front-rear direction. Specifically, the guide portion 56 is provided at a position rearward from the terminal portion of the handling cylinder 25 and at a position rearward from the rear end portion of the second sieve line 34 in the front-rear direction. .. The guide portion 56 is provided at a position rearward of the separation drum 43 and at a position rearward of the rear end portion of the second inclined portion 48 in the front-rear direction. The guide portion 56 is provided at a position within the existence range of the straw rack 36 in the front-rear direction. The guide portion 56 is provided at a position in front of the shutter portion 53 in a state where the opening degree of the dust exhaust port 52 is minimized in the front-rear direction.

Of the guide portions 56, the guide surface 56a for guiding the threshed material toward the center side in the left-right direction of the sheave case 30 is configured to have an inclined shape located on the rear side toward the center portion in the left-right direction of the sheave case 30.

With this configuration, it is possible to prevent the threshed product located between the lateral side portion 30a of the sheave case 30 and the threshing side wall portion 23 from leaking to the outside from the rear end portion of the sheave case 30.

[Another Embodiment]
Hereinafter, another embodiment in which the above embodiment is modified will be illustrated. The following alternative embodiments may be applied to the above embodiment in combination as long as there is no contradiction. The scope of the present invention is not limited to the contents of each embodiment.

(1) In the above embodiment, the configuration in which the separation drum 43 is provided has been described as an example, but the separation drum 43 may not be provided.

(2) In the above embodiment, the guide portion 56 is provided at a position on the front side of the shutter portion 53 in a state where the opening degree of the dust discharge port 52 is minimized from a position on the rear side of the separation drum 43 in the front-rear direction. Although the configuration described above has been described as an example, the present invention is not limited to the above embodiment. For example, the guide portion 56 may be provided at a position behind the shutter portion 53 in a state where the opening degree of the dust discharge port 52 is minimized from a position behind the separation drum 43 in the front-rear direction. ..

(3) In the above embodiment, the guide portion 56 has been described as an example of a configuration provided at a position rearward from the rear end portion of the second inclined portion 48, but the present invention is limited to the above embodiment. It's not a thing. For example, the guide portion 56 may be provided at a position within the existence range of the second inclined portion 48 in the front-rear direction.

(4) As shown in FIG. 5, the guide portion 56 extends from the lateral portion 30a of the sheave case 30 toward the center portion in the left-right direction of the sheave case 30 and below the upper end portion of the lateral portion 30a. It may be configured to include an extending extension portion 57.

(5) In the above embodiment, the guide portion 56 has been described as an example of a configuration provided at one location in the front-rear direction above each of both lateral portions of the sheave case 30, but the present invention has been described above. It is not limited to the form. For example, the guide portions 56 may be provided at a plurality of locations in the front-rear direction above each of the lateral portions of the sheave case 30.

(6) In the above embodiment, the guide surface 56a has been described based on an example in which the guide surface 56a is configured to have an inclined shape located on the rear side toward the central portion in the left-right direction of the sheave case 30, but the present invention is based on the above embodiment. Not limited. For example, the guide surface 56a may be configured to extend in a direction orthogonal to the surface of the lateral portion 30a of the sheave case 30.

The present invention can be applied to a harvester that harvests crops to be planted while traveling, and can be applied not only to a head-feeding combine but also to a normal combine and the like.

9: Threshing device 20: Threshing part 21: Sorting part 23: Threshing side wall part 25: Handling cylinder 26: Receiving net 30: Sheave case 30a: Horizontal part 43: Separation drum 45: First item collection part 46: Second item Collection part 48: Second inclined part (inclined part)
52: Dust exhaust port 53: Shutter part 54: Gap filling member 56: Guide part 56a: Guide surface 57: Extension part

Claims (10)

A threshing department that threshes the introduced crops,
A sorting unit provided below the threshing unit for sorting and processing the threshed product obtained from the threshing unit.
The threshing section and the left and right threshing side wall portions located on the left and right sides of the sorting section are provided.
The sorting unit is provided with a sheave case for rocking and sorting while transferring the threshed product to the rear by rocking drive.
Above the lateral portion of the sheave case, a guide portion for guiding the threshed product located between the lateral portion and the threshing side wall portion toward the central portion in the left-right direction of the sheave case is provided. Threshing device. The threshing section is provided with a handling cylinder for threshing crops by rotational drive and a receiving net provided on the outer periphery of the lower portion of the handling cylinder.
The threshing device according to claim 1, wherein the guide portion is provided at a position rearward from the rear end portion of the net in the front-rear direction. The handling cylinder extends to the rear side of the rear end portion of the receiving net, and is extended to the rear side.
The threshing device according to claim 2, wherein the guide portion is provided at a position rearward from the terminal portion of the handling cylinder in the front-rear direction. A separation drum for separating the cut straw and the grains while diffusing the threshed product is provided above the sheave case at the rear of the handling cylinder.
The threshing device according to claim 3, wherein the guide portion is provided at a position behind the separation drum in the front-rear direction. A dust outlet for discharging the waste straw transferred by the sheave case to the outside of the device is provided.
A shutter portion for adjusting the opening degree of the dust outlet by swinging is provided above the rear end portion of the sheave case.
The threshing device according to any one of claims 1 to 4, wherein the guide portion is provided at a position in front of the shutter portion in a state where the opening degree of the dust outlet is minimized in the front-rear direction. .. Below the sheave case, there is a screw-type first item collection unit that collects the selected first item, and a screw that is provided behind the first item collection unit and collects the selected second item. Equipped with a second item collection unit of the ceremony,
Before and after the second item collecting part, a downwardly constricted inclined part having the second item collecting part as the lowermost end is provided in a side view.
The threshing device according to any one of claims 1 to 5, wherein the guide portion is provided at a position within the existence range of the inclined portion in the front-rear direction. A gap-filling member that is flexible and fills the gap between the upper end of the lateral side and the threshing side wall.
The threshing device according to any one of claims 1 to 6, wherein the guide portion is provided on the gap filling member. 7. The threshing device according to the first paragraph. The threshing device according to any one of claims 1 to 8, wherein the guide portions are provided at a plurality of locations in the front-rear direction. The threshing device according to any one of claims 1 to 9, wherein the guide surface in the guide portion is configured in an inclined shape located on the rear side toward the central portion in the left-right direction of the sheave case.

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