JP2001045853A - Threshing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate trouble in deterioration of separating performances of a chaff sieve by falling of broken culms. SOLUTION: This threshing device is obtained by mounting auxiliary fins 57 and 58 on the front of chaff sieve fins 53a, 53b and 54a capable of freely opening, closing and regulating the front and rear intervals in the threshing device equipped with a shaking separation plate 30 installed under a threshing cylinder 6 and a chaff sieve 32 formed of the plural chaff sieve fins 53a 53b and 54a arranged in the shaking separation plate 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine for continuously cutting and threshing grain culms, for example.

[0002]

Conventionally, an oscillating sorter is provided below the handling cylinder, and a chaff sheave formed by a plurality of chaff sheave fins is provided on the oscillating sorter to remove deagglomerated material falling below the handling cylinder. There is a technique of sorting by a chaff sieve, causing the grains to leak downward, and discharging the straw debris behind the upper surface of the chaff sieve. However, when threshing of the grain culm, which is likely to be cut by the handling cylinder, or when the threshing material falls to the chaff sheave, the cut culm falls onto the upper surface of the chaff sheave and rushes between the chaff sheave fins to be caught. However, there is a problem that the sorting performance of the chaff sheave is reduced.

[0003]

According to the present invention, there is provided a threshing apparatus in which a swing sorter is provided below a handling cylinder and a chaff sheave formed by a plurality of chaff sheave fins is provided on the swing sorter. Auxiliary fins are attached to the front of the adjustable chaff sheave fins, so that even if the culm cut by threshing falls to the lower chaff sheave, the auxiliary fin prevents the culm from entering between the chaff sheave fins It is possible to easily prevent the cut culm from catching on the chaff sieve, and to easily eliminate the problem that the chopping performance of the chaff sheave is reduced by the fall of the cut culm, and the grain culm and the condition in which the culm break easily occurs. However, it is possible to easily improve the threshing and sorting performance.

Further, auxiliary fins are attached to the chaff sheave fins located below the dust outlet at the rear of the handling chamber in which the handling cylinder is provided, and the culms cut by threshing tend to fall in large quantities under the dust outlet. Since the catch of the culm is prevented by the auxiliary fin, it is possible to easily improve the sorting performance without lowering the sorting processing ability of the chaff sieve.

Further, auxiliary fins are attached to the chaff sheave fins located below the front side of the fourth gutter, and the fins cut from the straw to be discharged outside the machine are likely to fall in large quantities by the auxiliary fins below the fourth gutter. Because it prevents the culm from getting caught,
Even if the grain remaining in the waste straw is actively dropped and the cut culm falls a lot, the sorting performance of chaff sieve can be easily maintained and it is discharged out of the machine from the fourth gutter Grain loss can be easily reduced.

Further, the auxiliary fin is formed such that the lateral width of the auxiliary fin is shorter than that of the chaff sheave fin, and the auxiliary fin is attached to the side of the chaff sheave opposite to the processing cylinder provided on one side rear of the handling cylinder. The culm cut by threshing is less likely to fall, and the amount of grain leakage of the chaff sheave below the processing cylinder can be easily ensured. The ability can be easily maintained.

In addition, the front upper surface of the chaff sheave is inclined so that the rear is lower, and auxiliary fins are attached to the chaff sheave fins at the lower end of the slope below the dust discharge port. It is possible to improve the sorting efficiency by moving it backward, and to smoothly discharge the culms (straw chips) falling on the upper surface of the auxiliary fin to the rear of the upper surface of the chaff sheave.

An auxiliary fin is attached to a chaff sheave fin located at an intermediate portion of a front chaff sheave for automatically changing a grain leakage interval. A front fin is provided between a handling cylinder and a lowermost gutter. By providing a chaff sieve, it is possible to easily improve the collecting function of the grain and prevent a decrease in the sorting accuracy of the chaff sieve due to clogging of the culm.

The rear upper surface of the chaff sheave is inclined so that the front becomes lower, and auxiliary fins are attached to the lower end of the chaff sheave below the fourth gutter. The culm (straw chips) falling on the upper surface of the auxiliary fins can be smoothly discharged to the rear of the chaff sheave.

An auxiliary fin is attached to a chaff sheave fin located at a front part of a rear chaff sheave for manually changing a grain leakage interval. A rear fin is provided between a dust suction fan and a lower second gutter. By providing a chaff sieve, it is possible to easily reduce the loss of sorting of grains and prevent clogging of the culm of the chaff sieve.

In addition, the culm cut by threshing is supplied to the upper surface of the chaff sheave from the front end side toward the upper surface of the rear auxiliary fin.
When it falls on the upper surface, the cut culm can be quickly transferred backward by the sorting wind of Karino (36) supplied to the upper surface of the chaff sheave (32), thereby improving the dust removal efficiency of the chaff sheave (32) and maintaining the sorting accuracy. It can be easily achieved.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a left side view of the combine, and FIG. 2 is a plan view thereof. In the figure, (1) is a track frame on which a pair of right and left traveling crawlers (2) and (2) are mounted, and (3) is the track frame ( 1) Machine base erected on the upper side, (4)
Stretches the feed chain (5) to the left and handles the cylinder (6)
And a threshing unit having a built-in processing cylinder (7), (8) is a 4-row mowing unit having a cutting blade (9) and a grain culm transport mechanism (10), etc., and (11) is a mowing frame (12). , A hydraulic lifting cylinder for raising and lowering the mowing unit (8), (13) a straw cutter facing the end of the straw chain (14), (1)
5) is a grain tank for carrying the grains from the threshing unit (4) via a fryer (16), and (17) is the tank (15).
Paddy pad for carrying out the grains of the rice to the outside of the machine, (18) a driver's cab provided with an operation section (19) and a driver's seat (20), (21)
Is an engine provided below the driver's seat (20), and is configured to continuously cut and thresh grain stalks.

Further, as shown in FIGS. 3 to 5, a rectangular box-shaped casing (22) is formed on the upper surface of the machine base (3), and a handling chamber (23) is provided above a front portion inside the casing (22). ) Is formed, and inside the handling chamber (23), the handling cylinder (6), which has a large number of teeth (24)...
Are provided such that the axis of the line is substantially parallel to the running direction.
A receiving net (25) is provided below the handling cylinder (6), and a receiving net is formed except for a straw discharge port (27) defined by a partition plate (26) at the rear end of the handling cylinder (6). (25) is stretched, and a straw passage (28) is formed behind the handling chamber (23).

A sorting mechanism (29) is provided below the handling room (23), and a swing sorting board (30) is provided. The rocking sorter (30) includes a falling plate (31) provided substantially below the receiving net (25) and a leaking horizontal bar-shaped chaff sheave provided from below to the back of the straw discharge port (27). (3
2), a chaff receiving plate (33) provided below a front portion of the chaff sheave (32), and a sorting net (34) connected to a rear end of the chaff receiving plate (33). Then, the rocking sorter (30) is rocked by the rotation of the eccentric shaft (35) in the axial direction (front-rear direction) of the handling cylinder (6), so that the straw chips are sent backward, and Drop the grains down.

In addition, Karami (3) blows up the sorting wind toward the sorting net (34) by the guidance of the wind direction plate (36a).
6), a first gutter (37) for receiving kernels dropped from the sorting net (34), and a second gutter (38) for receiving a mixture of kernels and straw falling from the rear of the chaff sheave (32), that is, a second product. Are provided below the swinging sorter (30). The grain that has entered the first gutter (37) passes through a spiral plate-shaped first conveyor (39) in the first gutter (37) and a flouring cylinder (16) containing a spiral plate-shaped conveyor. It is transferred to the grain tank (15) from the upper end charging port. In addition, the second product that has entered the second gutter (38) passes through the spiral sorter through the spiral plate type second conveyor (40) and the reduction conveyor (41) in the second gutter (38). The chaff sheave (32) of (30) is reduced and transferred to the upper surface on the front side.

A feed chain (5) is provided on the left side surface of the casing (22) for transferring grain culms from the cutting section (8) along the axis of the handling drum (6). A straw chain (14) is provided on the rear upper surface of the casing (22) for inheriting the straw from the feed end of the feed chain (5) and transferring the straw to the rear of the casing (22). The culm supplied from 8) in a sideways posture is discharged to the rear straw cutter (13) via each chain (5) (14) and released while being cut off, and the rear side of the casing (22). Straw passage (28)
A straw discharge plate (43) is provided at the rear end side of the fourth gutter (42) forming the opening and closing opening and closing, and the straw in the sideways posture sent to the end of the straw discharge chain (14) is removed from the discharge plate (43) to the casing. (22) The cereal stem supplied from the reaping unit (8) is dropped to the rear field in an uncut state, is passed on to the feed chain (5), and the cereal stem transferred by the feed chain (5) is: The thresh by the handling cylinder (6), and the culm after threshing, that is, the straw, is passed from the feed end of the feed chain (5) to the straw chain (14), is transported backward, and is transported rearward to the straw discharge plate (4).
It is configured to drop from 3) to a field or to be released after being cut by the cutter (13).

The grains threshed in the handling room (23) fall downward from the receiving net (25), and are oscillated by the rocking sorter (3).
It enters into the first gutter (37) via the drifting board (31) and the sorting net (34). Then, the grains of the first gutter (37) are fed into the grain tank (15) through the first conveyor (39) and the fryer cylinder (16), and are discharged from two outlets formed on the lower surface of the tank (15). Drop into the lower two paddy bags and pack into each bag. A large number of empty paddy bags are hung on a receiving rod and hung, and when the bag attached to the tank (15) outlet is full of grains, the next bag is attached to the tank (15) outlet. I do. This work is performed by a worker on the paddy stand (17). On the other hand, the receiving network (2)
Large threshing material such as straw waste that did not fall from 5) is sent out from the reprocessing port (44) at the rear of the handling room (23) to the left processing cylinder (7), and after threshing again, the lower chaff sheave (32) Drop on the upper surface. The processing cylinder (7) has screw blades mounted on the outer periphery thereof, and a processing net (45) is provided around the lower part of the processing cylinder (7) to allow reprocessed grains to leak from the processing net (45). On the other hand, by the sorting wind from Karino (36) and the rocking motion of the rocking sorting board (30),
Heavy threshing, that is, grains falling from the chaff sieve (32), and large and light straw debris moving backward on the upper surface of the chaff sheave (32) and being discharged out of the machine to be sorted into grains and straw debris The second object falling from the rear portion of the chaff sheave (32) enters the second gutter (38), and the second gutter (3)
It is configured to be reductively transferred to the upper surface of the front of the chaff sheave (32) via the spiral second conveyor (40) in 8) and sorted again.

A sorting drive case (46) is provided in front of the sorting mechanism (29), and a sorting drive shaft (47) is inserted into the case (46) to selectively drive an output shaft of the engine (21). The belt (48) is connected to the shaft (47), and the sorting drive shaft (47) is connected to each part of the sorting mechanism (29) by the belt (4).
9) (50) and (51) are connected, and the rocking sorter (30) is rocked in the front-rear direction, so that Karamin (36) and each conveyor (3)
9) Driving the (40) to separate the fallen material falling down the handling cylinder (6) into grains and straw chips and collect the grains, and to collect the grains, Number conveyor (39)
A belt (49) for transmitting the power of the engine (21) to the
A belt (50) for transmitting power to the second conveyor (40) via the first conveyor (39), and the conveyor (39);
A belt (51) for transmitting the power of (40) to the swinging sorter (30) is provided, and each part of the sorting mechanism (29) is driven by three belts (49), (50), and (51).

Further, a cross flow fan (52) is provided on the lower side of the fourth gutter (42) above the rear part of the rocking sorter (30), and the cross flow fan (52) is mounted on the second conveyor (40) by a belt. (50) The straw (11) is connected to the fan (52) by a belt, and the cutter (13) can be attached or detached as required by a belt-hanging operation, and the fan (52) can be attached. To the feed chain (5) via the feed chain clutch, and the straw waste and dust discharged from the processing cylinder (7), and the straw waste moving to the rear upper surface of the rocking sorter (30). The fan (52) sucks light dust out of the machine and discharges it out of the machine, while dropping the remaining heavy straw waste from the rear end of the swinging sorter (30) to the machine below. I have.

Further, as shown in FIGS. 4 to 7, a front chaff sheave (53) disposed above the paddy pad (33) and the sorting net (34), and a part above the second gutter (38). A rear chaff sheave (54) disposed on the chaff sheave (32) is provided on the chaff sheave (32), and a rear chaff sheave (53) front upper surface and a front chaff sheave (53) front lower surface from the rear end of the lower surface of the flocking plate (31). The selected wind of the Karino (36) is sent out toward the chaff sheave (32), and the kernels are allowed to leak while the wind is selected on the front upper surface. Also, the front chaff sieve (5
3) A plurality of front fins (53a) and a plurality of central fins (53b) are provided, and the electric sorting is performed based on the detection result of the sorting amount sensor (55a) for detecting the unsorted grain layer thickness on the upper surface of the chaff sheave (32). The motor (55b) is automatically controlled so that each fin (53a) (5
3b) is swung back and forth, and the chaff sheave (3
2) Fins (53a) (53b) when there are many grains on top
The gap between the fins (53a) and (53b) is automatically reduced when the grain gap is large, and when there are few grains, the operation is performed with high sorting accuracy. On the other hand, a plurality of rear fins (5
4a) and a plurality of rearmost fins (54b), the rearmost fins (54b) are fixed to the swinging sorter (30) body, and the leakage interval between the rearmost fins (54b) is always kept constant. By manually operating the opening / closing lever (55c), the lower end side of the rear fin (54a) is swung back and forth around the fulcrum shaft (56) on the upper end side, and the leakage interval between the rear fins (54a) is opened and closed. This adjusts the amount of kernel particles falling from between the rear fins (54a). The kernel on the upper surface of the front chaff sheave (53) is dropped to the first gutter (37). Are dropped into the second gutter (38), and the straw debris on the upper surface of the chaff sheave (32) is moved backward to cross the flow fan (52) or the rearmost fin (5).
4b) Discharge to the outside of the rear end machine. In addition, the front fin (5
3a) is mounted in a rearwardly inclined position by forming an inclination angle (A) rearward such that the rear upper surface is lower than the front upper surface, the center fin (53b) is mounted substantially horizontally, and the rear fin (54) is mounted.
a) and the rearmost fin (54b) are attached to the front fin (53a) by forming a slant angle (B) forward so that the rear upper surface is higher than the front upper surface, and mounting the kernel on the front fin (53a). And the backward feeding of straw waste (threshing and sorting products) quickly, while efficiently processing the grains on the front fins (53a),
The speed of rearward feed of the crushed sorted material on the rear fin (54a) is reduced to improve the efficiency of collecting the kernel into the second gutter (38), and the kernel discharged from the rearmost fin (54b) to the outside of the machine. Reduce the volume and prevent sorting losses.

Further, a swing sorter (30) is provided below the handling cylinder (6), and is formed by a plurality of chaff sieve fins, a front fin (53a), a center fin (53b), and a rear fin (54a). Chaff sieve (3
In the threshing device in which 2) is provided on the swinging sorter (30),
Each two fins (53) of the front two fins (53a) of the front fin (53a) group and the front three fins (53a) of the center fin (53b) group and the front two fins (53a) of the rear fin (54a) group whose front-rear spacing is adjustable.
a) Auxiliary fin (57) on the front of (53b) (54a)
Even if the culm cut by threshing falls to the lower chaff sheave (32), the auxiliary fin (57) prevents the culm from protruding between the fins (53a) (53b) (54a). ) (58) to prevent the cut culm from being caught between the chaff sheaves (32), to eliminate the problem that the chopping performance of the chaff sheave (32) is reduced by the fall of the cut culm, The aim is to improve the threshing and sorting performance, even for cereals and conditions that are likely to occur.

A handling room (2) in which a handling cylinder (6) is provided.
3) Auxiliary fins (57) are attached to the front fin (53a) and the center fin (53b) located below the straw discharge port (27), which is the rear exhaust port, and a large amount of culms cut by threshing fall. Auxiliary fins (57) prevent the culm from being caught below the easy straw discharge port (27), improve the sorting performance without lowering the sorting capacity of the chaff sheave (32), and improve the fourth gutter (42). ) An auxiliary fin (58) is attached to the rear fin (54a) located below the front side, and the auxiliary fin (58) is provided below the fourth gutter (42) where a large amount of cut culm easily falls from the waste straw to be carried out of the machine. Even if the amount of fall of the cut culm is increased by preventing the culm from being caught and the grains remaining on the straw are actively dropped, the sorting performance of the chaff sheave (32) is maintained and the fourth gutter ( 42) is discharged outside the machine Reduce the particle loss.

The width of the auxiliary fins (57) and (58) is shorter than that of the front fin (53a), the center fin (53b), and the rear fin (54a). Auxiliary fins (57) are shifted to the side of the chaff sheave (32) opposite to the processing cylinder (7) provided at the rear.
(58) is attached, the grain of the chaff sheave (32) below the processing cylinder (7) where the fall of the culm cut by threshing is small is secured, and the kernel that falls much below the processing cylinder (7) is secured. , Smoothly leak down below the chaff sheave (32),
The sorting processing ability of the chaff sheave (32) below the processing cylinder (7) is maintained.

Further, the upper surface of the front part of the chaff sheave (32) is inclined so that the rear is lower, and the auxiliary fin (57) is attached to the chaff sheave fin (53a) at the lower end of the slope below the dust outlet (27). 32) Grains falling on the upper surface are moved backward by tilting quickly to improve the sorting efficiency, and culms (straw chips) falling on the upper surface of the auxiliary fins (57) are smoothly discharged to the rear of the upper surface of the chaff sheave (32). The auxiliary fins (5a) are inserted into the chaff sheave fins (53a) (53b) located in the middle of the front chaff sheave (53), which automatically changes the grain leakage interval.
7) is attached, and a front chief sieve (53) is provided between the handling cylinder (6) and the lowermost gutter (37) to improve the collecting function of the grain and to prevent a decrease in the accuracy of sorting the chaff sieve due to clogging of the culm. Plan.

Further, the rear upper surface of the chief sheave (32) is inclined so that the front becomes lower, and the auxiliary fin (58) is attached to the chief sheave fin (53a) at the lower end of the inclination below the fourth gutter (42). ) Grains falling on the upper surface are moved backward slowly by tilting to improve the sorting accuracy, and the culms (straw chips) falling on the upper surface of the auxiliary fins (58) are smoothly discharged to the rear of the chaff sheave (32). Auxiliary fins (58) are attached to the chaff sheave fins (54a) located in front of the rear chaff sheave (54) for manually changing the grain leakage interval. A rear chaff sieve (54) is provided between the gutters (38) to reduce loss of kernel sorting and prevent clogging of the chaff sheave.

Further, when the amount of particles falling from the handling chamber (239) falling into the chaff sheave (32) is small, the front fin (53a) and the center fin (53b) are automatically controlled by the selection motor (55b) or operated by the opening / closing lever (55c).
Alternatively, by closing the rear fin (54a) to reduce the front-rear distance, the fins (53a) (53b) (54
When the distance between the front and rear of the a) is closed in the fully closed state by the auxiliary fins (57) and (58), and there are few grains or the like on the upper surface of the chaff sheave (32), the cut culm becomes the fin (53a)
(53b) Although it is easy to rush between (54a), the fins (53a) are
(53b) Even if the front and rear intervals of (54a) are closed and the cut culm falls on the chaff sheave (32), the chaff sheave (32) does not protrude between the fins (53a) (53b) (54a). Karino (36) sorting wind and chaff sieve (32) supplied to the upper and lower surfaces in front of)
The stalks are fed backward by the swinging feed action of, and the cut culm is smoothly discharged out of the machine without being caught by the chaff sheave (32).

Also, from the front end side of the chaff sheave (32) to the rear upper fin (57) upper surface,
6) When the culm cut by threshing falls on the upper surface of the auxiliary fin (57) and the culm cut by threshing is supplied to the upper surface of the chaff sheave (32), the culm is promptly separated by the culling wind of Karamin (36). The chaff sheave (32) is transported backward to improve the dust-extraction efficiency and maintain the sorting accuracy.

If there is a large amount of debris from the handling chamber (23) that falls into the chaff sheave (32), the sorting motor (55)
b) The front fin (53a) and the center fin (53b) or the rear fin (54a) are opened and moved by the automatic control or the operation of the opening / closing lever (55c) to increase the front-rear distance, and the grain on the upper surface of the chaff sheave (32) is quickly removed. Even if it leaks, since many grains exist on the upper surface of the chaff sheave (32), when the cut culm falls on the chaff sheave (32), the cut culm is cut into the chaff sheave (32) by the grain on the upper surface of the chaff sheave (32). Is prevented from entering, and the cut culm does not catch on the chaff sheave (32), but is sent backward by the Karin (36) sorting wind from the front upper surface of the chaff sheave (32) and the feeding action of the chaff sheave (32). Is discharged outside the machine.

[0029]

As is apparent from the above embodiments, the present invention has a swing sorter (30) provided below the handling cylinder (6) and a plurality of chaff sheave fins (53a) (53b).
In a threshing apparatus in which a chaff sheave (32) formed by (54a) is provided on a swing sorting machine (30), a chaff sheave fin (53a) (53
b) Auxiliary fins (57) and (58) are attached to the front surface of (54a). Even if the culm cut by threshing falls to the lower chaff sieve (32), the culm can be reduced to the chaff sieve fin (53a) ( The auxiliary fins (57) and (58) can prevent the intrusion between 53b) and (54a).
The cut culm can be easily prevented from being caught on the chaff sheave (32), and the chaff sheave (3
The disadvantage of 2) that the sorting performance is deteriorated can be easily eliminated, and the threshing and sorting performance can be easily improved even with cereal culms and conditions in which culm breakage is likely to occur.

A handling room (2) in which a handling cylinder (6) is provided.
3) An auxiliary fin (57) is attached to the chaff sheave fins (53a) (53b) located below the rear dust outlet (27), and the culm cut by threshing tends to fall in large quantities. 27) Since the catching of the culm is prevented by the auxiliary fins (57) below, it is possible to easily improve the sorting performance without lowering the sorting processing ability of the chaff sheave (32).

An auxiliary fin (58) is attached to a chaff sheave fin (54a) located below the front side of the fourth gutter (42), and a large amount of cut culms fall from waste straw to be carried out of the machine. Since the auxiliary fins (58) prevent the culm from being caught below the easy fourth gutter (42), the grain remaining on the straw is positively dropped, so that the amount of the cut culm falls. In addition, the sorting performance of the chaff sheave (32) can be easily maintained, and the loss of grain discharged from the fourth gutter (42) to the outside of the machine can be easily reduced.

The chaff sieve fins (53) (5)
The width of the auxiliary fins (57) and (58) is made shorter than that of the processing cylinder (4), and the auxiliary fins (57) and (58) are provided on one side and rear side of the handling cylinder (6). And the auxiliary fins (57) and (58) are attached, and the amount of grain leakage of the chaff sheave (32) below the processing cylinder (7) with less falling of the culm cut by threshing can be easily secured, Grains that fall largely below the processing cylinder (7) can be smoothly leaked below the chaff sheave (32), and the sorting processing ability can be easily maintained.

Also, the upper surface of the front part of the chaff sheave (32) is inclined so that the rear is lower, and the auxiliary fin (57) is attached to the chaff sheave fin (53a) at the lower end of the inclination below the dust outlet (27). The grains falling on the upper surface of the chaff sheave (32) can be quickly moved backward by the inclination to improve the sorting efficiency, and the culms (straw chips) falling on the upper surface of the auxiliary fin (57) can be removed by the chaff sheave (3).
2) It can be discharged smoothly to the rear of the upper surface.

The auxiliary fins (5a) and (53b) located in the middle of the front chaff sheave (53) for automatically changing the grain leakage interval are attached to the auxiliary fins (53a) and (53b).
7) attached, the handling cylinder (6) and the lowermost gutter (3)
By providing a front chaff sieve (53) during 7), it is possible to easily improve the grain collecting function and prevent a decrease in the accuracy of chaff sheave sorting due to clogging of the culm.

The rear upper surface of the chief sheave (32) is inclined so that the front becomes lower, and an auxiliary fin (58) is attached to the chaff sheave fin (53a) at the inclined lower end below the fourth gutter (42). Grains falling on the upper surface of the chaff sheave (32) can be moved backward slowly by tilting to improve the sorting accuracy, and the culms (straw chips) falling on the upper surface of the auxiliary fin (58) can be removed from the chaff sheave (3).
2) It can be discharged smoothly to the rear.

An auxiliary fin (58) is attached to a chaff sheave fin (54a) located in front of a rear chaff sheave (54) for manually changing a grain leakage interval. 52) and the lower second gutter (3
The rear chaff sieve (54) is provided between 8), so that it is possible to easily reduce the sorting loss of the grain and prevent the clogging of the chaff sieve from clogging.

[0038] Also, from the front end side to the rear upper fin (57) upper surface of the chaff sheave (32),
When the culm cut by threshing falls on the upper surface of the auxiliary fins (57), the culm is supplied by the karamino (36) supplied on the upper surface of the chaff sheave (32). The chaff sheave (32) can be quickly transferred to the rear, and the dust removal efficiency of the chaff sheave (32) can be improved and the sorting accuracy can be easily maintained.

[Brief description of the drawings]

FIG. 1 is an overall left side view of a combine.

FIG. 2 is a plan view of the same.

FIG. 3 is an explanatory side view of a threshing unit.

FIG. 4 is an enlarged explanatory view of the same.

FIG. 5 is an explanatory side view of the chaff sheave.

FIG. 6 is an explanatory rear view of the same.

FIG. 7 is a side view of the front chaff sieve fin.

FIG. 8 is a side view of the rear chaff sheave fin.

[Explanation of symbols]

 (6) Handling cylinder (7) Processing cylinder (23) Handling room (27) Straw discharge port (dust discharge port) (30) Swing sorter (32) Chaff sheave (36) Karamin (42) Fourth gutter (53) Front chaff sheave (54) Rear chaff sheave (53a) Front fin (chaff sheave fin) (53b) Center fin (chaff sheave fin) (54a) Rear fin (chaff sheave fin) (57) (58) Auxiliary fin

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yozaburo Narahara 1-32 Chaya-cho, Kita-ku, Osaka City Inside Yanmar Agricultural Machinery Co., Ltd. 72) Inventor Masahiko Tadokoro 428 Enami, Okayama-shi, Okayama Pref. (72) Inventor Eiji Arita 428 Enami, Okayama-shi, Okayama Pref. BA11 BA21 BA24 BA35 BB27 BB28 BB29 CA02 CB02 EA03

Claims (9)

[Claims] 1. A threshing device in which a swing sorting machine is provided below a handling cylinder and a chaff sheave formed by a plurality of chaff sheave fins is provided on the swing sorter. A threshing device characterized by attaching auxiliary fins. 2. The threshing apparatus according to claim 1, wherein an auxiliary fin is attached to a chaff sheave fin located below a dust outlet at a rear portion of a handling chamber in which a handling cylinder is provided. 3. The threshing apparatus according to claim 1, wherein an auxiliary fin is attached to the chaff sheave fin located below the front side of the fourth gutter. 4. The auxiliary fin is formed such that the lateral width of the auxiliary fin is shorter than that of the chaff sheave fin, and the auxiliary fin is biased to a side of the chaff sheave opposite to the processing cylinder provided on one side rear of the handling cylinder. The threshing apparatus according to claim 1, wherein 5. The threshing apparatus according to claim 2, wherein an upper surface of a front portion of the chaff sheave is inclined so that a rear portion thereof is lower, and an auxiliary fin is attached to a chaff sheave fin at an inclined lower end portion below the dust outlet. 6. The threshing apparatus according to claim 2, wherein an auxiliary fin is attached to a chaff sheave fin located at an intermediate portion of the front chaff sheave for automatically changing a grain leakage interval. 7. The threshing apparatus according to claim 3, wherein the rear upper surface of the chaff sheave is inclined so that the front becomes lower, and auxiliary fins are attached to the chaff sheave fins at the lower end of the inclination below the fourth gutter. 8. The threshing apparatus according to claim 3, wherein auxiliary fins are attached to the chaff sheave fins located at the front of the rear chaff sheave for manually changing the grain leakage interval. 9. The threshing apparatus according to claim 2, wherein a sorting wind of Karamin is supplied to the upper surface of the chaff sheave from the front end side to the upper surface of the rear auxiliary fin.