KR20080079580A - Threshing apparatus - Google Patents

Abstract

A threshing apparatus is provided to improve the selecting capacity by forming stepped portions in the course of selection of chaff sieves and using wind for selecting grains and straws. In a threshing apparatus, a first stepped-in part is formed by installing the front end portion of a second chaff sieve(33) on a position that is lower than the rear end portion of a first chaff sieve(31). A second stepped-in part(B) is formed by forming the front end portion of a third chaff sieve(34) to be lower than the rear end portion of the second chaff sieve. A sending path is formed to send air toward the first stepped-in part and the second stepped-in part. A threshing drum(2) is installed inside a threshing chamber. A first dust discharge hole(10) is installed at the rear end of the threshing chamber.

Description

Threshing Device {THRESHING APPARATUS}

The present invention relates to a threshing apparatus.

As a conventional technique, Patent Literature 1 discloses a swing sorting apparatus that receives a threshing processing material from a threshing chamber, sifts and sifts while sifting and conveying the transfer lathe, the first chaff sieve and the first chaff sieve. A first straw rack corresponding to the dust exhaust port bottom of the threshing chamber end, a second chaff sheave followed by the first straw rack, and a second straw rack; A threshing apparatus is described.

Moreover, patent document 2 has a conveyance shelf, a 1st chaff sieve, a 1st stroke rack, the 2nd chaff sheave continued rearward from the middle part of this 1st stroke rack, and a 2nd in order from the sorting direction upstream, and 2nd. The threshing apparatus which arrange | positioned a stroke rack is described.

[Patent Document 1] Japanese Patent Laid-Open No. 62-215320

[Patent Document 2] Japanese Unexamined Patent Publication No. 2002-101749

In the said prior art, the 1st stroke rack provided in the threshing apparatus of patent document 1 does not have the function to sift and select, and accommodates the process material from a 1st chaff sieve and the dust process material from the dust exhaust port of the threshing chamber end. Therefore, since only the function of forcibly conveying to the rear 2nd chaff sieve is provided, the improvement of sorting performance cannot be expected very much. In addition, the straw rack provided in the threshing apparatus of patent document 2 is a structure which does not let it flow down to the part which accommodates the dust removal process from a threshing chamber dust outlet directly, and most of it has a transfer function to a 2nd chaff sieve. Because it is a subject, it is hardly different from the former in performance.

This invention makes it a subject to improve the sorting performance with respect to the said prior art.

MEANS TO SOLVE THE PROBLEM This invention takes the following technical means in order to solve the subject mentioned above.

That is, in the invention described in claim 1, a threshing barrel 2 is provided in the threshing chamber 3, a water net 4 is provided below the threshing chamber 2, and the rear threshing chamber 3 is provided. On the side opposite to the side where the 1st dust exhaust outlet 10 is provided in the edge part, the feed chain 9 is installed in one side of the threshing chamber 3, and the said feed chain 9 of the threshing chamber 3 is installed. The communication port 11 which provides the dust processing chamber 18, installs the dust processing chamber 17 in the dust processing chamber 18, and communicates the rear end part of the threshing chamber 3 and the front end part of the dust processing chamber 18 is made. The second dust exhaust port 21 is provided at the rear end of the dust exhaust treatment chamber 18, and the oscillation screening device 24 is provided below the water net 4, and the front of the oscillation screening device 24 is lowered. The first sorting fan 25 is installed at the rear of the first sorting fan 25, and the first helix 26 is provided at the rear side of the first sorting fan 25, and the second helix 28 is placed at the rear side of the first helix 26. The suction dust collecting fan 29 is installed above the rear portion of the swing sorting device 24. It is installed, the swing sorting device 24 is provided on the conveyance shelf 30 of the front part which conveys the process material which flowed down from the water net 4 to the rear, and the back side of the conveyance shelf 30, and the said conveyance shelf 30 1st chaff sieve 31 for screening while sifting off the processed material taken from), and is installed in the rear side of the 1st chaff sieve 31, and screening while sifting the processed material discharged from the 1st dust discharge port 10 The second chaff sheave 33 which is provided below the first straw rack 32 and the first straw rack 32, and sorts the processed material sieved from the first straw rack 32 while being transported backward. ), A third chaff sieve 34 provided on the rear side of the second chaff sheave 33 and screening while sifting the processed material transferred from the second chaff sheave 33, and the third chaff sheave 34 The second strip which is installed at the rear side of the head) and sorts the processed matter discharged from the second exhaust port 21 while sieving. It is composed of a rack 35, the front end of the second chaff sheave 33 is provided at a position lower than the rear end of the first chaff sheave 31, the rear end and the second chaff sheave of the first chaff sieve 31 A first step A is formed between the front ends of the 33, and the front end of the third chaff sheave 34 is provided at a position lower than the rear end of the second chaff sheave 33 so that the second chaff sheave ( A second step B is formed between the rear end of the head 33 and the front end of the third chaff sheave 34, and the blower 46 of the first sorting fan 25 of the first sorting fan 25 Wind vents 38 and 38 are provided to divide the air blowing path into three directions in the vertical direction, and the sorting wind of the first sorting fan 25 passes through the first step A from below and sucks upward. The upper 1st blowing path a toward the exhaust fan 29 side, and the sorting wind of the 1st sorting fan 25 pass through the said 2nd chaff sieve 33 from below, and the suction backing fan 29 of the upper direction Side facing Is a second blowing path (b) in the middle portion, and the sorting wind of the first sorting fan 25 forms a lower third blowing path (c) through which the second step (B) passes from below to above. It was set as the threshing apparatus made into.

By this structure, the processed material which flows out from the water net 4 of the threshing chamber 3 is received on the transfer shelf 30, is conveyed to the 1st chaff sheave 31 of the rear side, and is screened. In addition, the processed material falling from the 1st dust discharge port 10 of the threshing chamber 3 terminal side is received on the lower 1st stroke rack 32, and is screened. The processed material falling downward from the first straw rack 32 is sieved and sorted while received on the second chaff sheave 33 on the lower side and moved back and forth. Thereafter, sieving is selected while reaching the rear second straw rack 35 from the end of the second chaff sheave 33 to the subsequent third chaff sheave 34.

When the processing material on the first chaff sheave 31 falls on the second chaff sheave 33 below from the rear end thereof, the first blowing path A which exits the first step A is upward. Separation of the first product (grain) and straw crumbs is favorably performed by the sorting wind.

Moreover, the 2nd ventilation path | pass (b) which passes the 1st step A part at the time of the fall to the 2nd chaff sheave 33 below, also the process material which sifts on the 1st stroke rack 32, and falls down below (b) Separation and separation of grain and straw waste can be performed correctly and satisfactorily by wind of sorting), and sorting performance improves.

In addition, when the fall from the 2nd chaff sieve 33 to the 3rd chaff sieve 34 separate | separates a 2nd thing and a straw crumb by the sorting wind of the 3rd air flow path (c) which passes this 2nd step B. Good sorting is performed to improve the sorting performance.

In addition, straw crumbs not falling downward from the second straw rack 35 are discharged to the outside of the threshing apparatus.

According to the invention described in claim 2, a second sorting fan 27 is provided between the first spiral 26 and the second spiral 28, and the sorting wind of the second sorting fan 25 is the second straw rack 35. The threshing apparatus of Claim 1 was formed, through which 4th air flow path | path (d) which passed through from below and toward the outer side of an upper threshing apparatus was formed.

By this configuration, the straw debris not falling downward from the second straw rack 35 is discharged to the outside of the threshing apparatus by the sorting wind of the fourth blowing path r.

The invention according to claim 3 is provided with an attaching plate 35a for attaching the second straw rack 35 to the swinging separator 24, and the lower end of the attaching plate 35a is provided with the fourth blowing path (d). The sorting wind of the 2nd sorting fan 27 was made to face the 3rd chaff sieve 34 by the said attachment plate 35a, The threshing apparatus of Claim 2 characterized by the above-mentioned.

By this structure, a part of the selection wind of the 4th blowing path r extends also to the 3rd chaff sieve 34 with a large quantity for selection.

(Effects of the Invention)

According to the invention as set forth in claim 1, since the front end of the second chaff sheave 33 is provided at a position lower than the rear end of the first chaff sheave 31, the processing material on the first chaff sheave 31 is removed from the rear end thereof. When falling on the 2nd chaff sieve 33, separation of a 1st thing and a straw crumb is performed favorably by the sorting wind of the 1st blowing path a which exits this 1st step A part upwards.

Moreover, since the 2nd chaff sieve 33 is in the position below the 1st straw rack 32, the processed material which sifts on the 1st straw rack 32, and selects and falls below is also the 2nd chaff sheave 33 below. When falling down, the sorting wind of the second blowing path b passing through the first step A can accurately and satisfactorily separate the grains and the straw debris, thereby improving the sorting performance of the first product. It can increase.

In addition, since the front end of the third chaff sheave 34 is provided at a position lower than the rear end of the second chaff sheave 33, the first chaff sieve 34 is provided at the time of falling from the second chave sheave 33 to the third chaff sheave 34. The sorting wind of the 3rd blowing path (c) passing through the 2nd step | paragraph B part can separate | separate sorting of 2nd material and straw debris well and correctly, and can improve the sorting performance of 2nd material.

According to the invention set forth in claim 2, the threshing apparatus exhibits the effect of the invention set forth in claim 1, and the straw crumbs which do not fall downward from the second straw rack 35 by the sorting wind of the fourth blowing path r. It can be discharged to the outside, improving the sorting performance.

According to the invention set forth in claim 3, the effect of the invention set forth in claim 2 is exhibited, and a part of the sorting wind of the fourth blowing path (r) also extends to the third chaff sieve 34 having a large amount of water to be selected. It can be further improved.

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described concretely based on drawing.

1 and 2 show a threshing apparatus to be mounted on a combine.

The water net 4 is attached along the lower half circumference of the threshing chamber 3 in which the threshing cylinder 2 with threshing tooth 1 was rotatably built. The water net 4 is provided between the threshing chamber front side plate 5 and the intermediate side plate 6. 8 is a threshing cylinder cover which covers the upper part of the threshing chamber 3, and it is set as the structure which can rock open and close around the axis center parallel to the rotation axis direction of the threshing chamber 2. As shown in FIG.

The feed chain 9 which sandwiches and feeds a grain stem to the threshing opening side of the threshing chamber 3 is installed. At the terminal side of the threshing chamber 3, a first dust outlet 10 for dropping the dust-treated material containing a large amount of straw crumbs or untreated material is provided downward, and the middle side plate 6 and the rear side plate 7 of the threshing chamber. Open between the holes.

On the side opposite to the feed chain 9 side of the threshing chamber 3, the 2nd process chamber 15 which rotatably built the 2nd process chamber 14 is arrange | positioned and provided. Moreover, behind the said 2nd process cylinder 14, the dust removal process cylinder 17 provided with the process tooth 16 is provided in the outer periphery on the same axial center as this 2nd process cylinder 14, and this dust removal process A dust treatment chamber 18 having a cylinder 17 rotatably installed is provided. Spiral shape is fixed to the beginning end of the dust treatment tube 17 to the communication port 11 communicated from the portion corresponding to the first dust outlet 10 at the end of the threshing chamber 3 to the exhaust treatment chamber 18 beginning. Facing the introduction blades 19 to facilitate introduction of the dust into the dust treatment chamber 18. A discharge vane 20 is provided at the rear end of the dust collecting chamber 17, and the dust discharged to the rear end of the dust collecting chamber 18 is discharged by the discharge vane 20 to the second end of the dust collecting chamber 18. It is set as the structure which discharge | releases the upper part of the rear end of the shaking-separation apparatus (swing-separation lathe) 24 mentioned later from the true mouth 21, and the exterior of a machine.

A swinging sorting device (swinging sorting shelf) 24 is provided below the threshing chamber 3, and the first sorting fan 25 and the first sorting order are located below from the upstream side of the sorting and conveying direction of the workpiece. The 1st collection container 26a which has the spiral 26, the 2nd sorting pan 27, and the 2nd collection container 28a which has the 2nd spiral 28 are further provided. Further, a suction dust collecting fan 29 is provided above the rear portion of the swing sorting device 24 to form a sorting chamber.

In addition, the first grain-weighing device pumps and transports the grain recovered by the spiral 26 to be stored in the grain tank. Moreover, the 2nd grain-graining apparatus 45 is set as the structure which reduces the 2nd thing collect | recovered by the 2nd spiral 28 into the process chamber 15 of the 2nd process cylinder 14.

The swing-separating device 24 is configured to receive the processed material from the threshing chamber 3 and the dust-treatment chamber 18, and to sift and sift while transferring the threshing chamber. (3) the transfer rack 30 which receives and processes the processed material from the water net 4, the 1st chaff sheave 31 provided continuously at the end of this transfer shelf 30, and the 1st chaff A first stroke rack 32 that is continuous to the end of the sheave 31 and receives and filters the dust-treated material from the first dust outlet 10 at the end of the threshing chamber 3, and the first stroke rack ( The second chaff sheave 33 and the second chave sheave 33 which follow the end of the 2nd chaff sheave 33 which collect | receive the process material sifted away from this 1st stroke rack 32, and transfer it to the back below 32). 3 chaff sheaves 34 and the exhaust chamber 18 continuously connected to the end of the third chaff sheave. The second straw rack 35 for receiving, sieving and screening the dust-treated material discharged | emitted from the dust discharge port 21 of the terminal is arrange | positioned. The grain sheave 36 is further arrange | positioned under the 1st chaff sieve 31 and the 2nd chaff sieve 33, the 1st return shelf 37a is arrange | positioned below the front end side of the grain sieve 36, and 1st The 2nd return shelf 37b is arrange | positioned under 2 stroke racks 35, and it installs integrally. The threshing chamber 3 is formed by the cooperative action of the sorting wind by the first sorting fan 25, the second sorting fan 27, and the suction backing fan 29, and the swinging of the swing sorting device 24. It is set as the structure which sifts and sorts, receiving the processed material which flowed down from the dust exhaust treatment chamber 18, and sieving and conveying.

The above-described configuration will be described in more detail, such that the second chaff sieve 33 is lower than the first chaff sieve 31 between the first chaff sieve 31 and the second chaff sieve 33. A first step A having a free fall is formed. The second step B having a predetermined drop is also formed between the end of the second chaff sheave 33 and the start of the third chaff sheave 34. In order for the processing material beyond the end of the first chaff sheave 31 to fall on the second chaff sheave 33 through the first straw rack 32, the beginning of the second chaff sheave 33 is first It arrange | positions below the start end of the stroke rack 32, and the end of the 2nd chaff sheave 33 extends rearward rather than the end of the 1st stroke rack 32, and arranges it. The first stroke rack 32 is provided at a position corresponding to the front and rear widths of the first dust exhaust port 10 at the end of the threshing chamber 3 and is provided at a position below the first dust exhaust port 10, and the first dust exhaust The waste material discharged | emitted from the ball | bowl 10 is accommodated, and it is set as the structure which sifts out and sorts.

The first chaff sheave 31 and the second chaff sheave 33 are arranged with a plurality of strip-shaped sheave plates 31a and 33a at equal intervals to pivotally attach the upper portion to the pivot attachment portions 31b and 33b. The lower part is swing-opened and opened along the long holes 31c and 33c on the arc, so that the opening degree of the screening interval can be adjusted. The third chaff sheave 34 is installed in a fixed state so as to maintain a constant inclination angle, and is disposed above the second helix 28. Moreover, also in this 3rd chaff sieve 34, when it is set as the structure which changes a sieve angle like the 1st chaff sieve 31 and the 2nd chaff sieve 33, it loses 3 times (a grain scatters out of a threshing apparatus, Because it may be a cause of harvest loss, stable sorting is possible by maintaining a fixed state with an appropriate opening degree. In addition, since the amount of the workpiece is large in the vicinity of the third chaff sieve 34, it is necessary to increase the amount flowing down from the second chaff sieve 33, and the third chaff sieve ( The screening performance is improved by widening the sieve spacing of 34).

The attachment plate 32a of the first stroke rack 32 is configured to guide the sorting wind at approximately equal inclination with the sheave plate of the first chave sheave 31, and the lower end of the attachment plate 32a is It is set so as to be located above the lower end of the start end side sheave plate 33a of the second chaff sheave 33 so that the sorting wind from below can escape upward through the attachment plate 32a and the sheave plate 33a. do. Moreover, the lower end of the attachment plate 32a is set so that it may be located below the lower end of the sieve plate 31a of the front end of the 1st chaff sieve 31, and is also sorted between the sieve plate 31a and the attachment plate 32a. It is assumed that the wind passes. Further, the first end of the first chaff sheave 31 is disposed at a position ahead of the threshing chamber 3 middle side plate 6, and the end of the first chaff sheave 31 is disposed at a position just below the middle side plate 6. As a result, the grain flows down in the first half of the swing sorting shelf, thereby improving the sorting efficiency. In addition, the start end of the first straw rack 32 subsequent to the end of the first chaff sheave 31 is located just below the middle side plate 6.

In addition, the upper surface of the first straw rack 32 is configured to be substantially the same plane as the virtual extension surface connecting the upper ends of the respective sheave plates 31a. The flow of the workpiece to the rack is smooth. (In addition, the front and rear ends of the respective virtual surfaces connecting the upper ends of the respective sieve plates 31a, 33a, and 34a are sheared by the chaff sheaves 31, 33, and 34, respectively. It's called the wealth and the tail.)

The lower surface of the first straw rack 32 is configured to be separated from the second chaff sheave 33 (to maintain the gradient θ) as the rear end side thereof, so that straw crumbs are blocked between the first straw rack and the second chaff sheave. It disappears and the flow to the back becomes favorable, and the grain flows down and it can promote.

The tuyere 46 of the first sorting fan 25 is divided into three by the two windshields 38 and 38 in the vertical direction, and the upper first blowing path a is formed by the first chaff sheave 31 and the first chaff sheave 31. The front end portion of the first stroke rack 32 and the front end portion of the second chaff sheave 33 are made to pass through the ventilation zone so that the sorting wind from below passes toward the upper side of the suction dust collecting fan 29. The second blowing path (b) in the middle portion has the second half of the first straw rack 32 and the substantially entire area of the second chaff sheave 33 in the blowing zone, and the sorting wind from below is directed to the suction suction fan 29 side above. Configure to pass through. The lower 3rd blowing path c mainly comprises the 3rd chaff sieve 34 in a blowing zone, and the sorting wind passes. Moreover, the sorting wind from the 2nd sorting fan 27 mainly passes the 2nd straw rack 35 in a blowing area, and forms the 4th blowing path r so that it may escape to the exterior of an upper machine. Moreover, a part of the sorting wind is extended to the 3rd chaff sieve 34 with a large quantity of to-be-processed object, and the improvement of sorting performance is aimed at.

The attachment plate 35a for the wind guide combined use of the second straw rack 35 extends the lower end side downward, and at the swing bottom dead center position of the second straw rack 35, the lower end portion of the attaching plate 35a is formed. 2, the sorting wind is introduced into the blowing roll by the sorting fan 27, and the sieve plate 34a at the end of the third chaff sheave 34 is introduced. Further, at the swing top dead center position, the lower end of the attachment plate 35a is deviated from the inside of the blowing wind so as to introduce the sorting wind into the range of the front and rear lengths of the second straw rack 35.

5 shows a support structure for supporting both ends of the chaff sheave 31 between the left and right swinging side plates 39 and 39. The support members 40 at both ends of each sheave plate 31a are made of resin, and each support member 40 includes a point shaft portion 40a for pivotally supporting an upper portion of the sheave plate 31a and a sheave plate ( The lower portion of 31a has a guide shaft portion 40b for guiding and supporting the swinging opening and closing along the arc-shaped long hole 31c. On the support side of the sieve plate 31a forming the corrugated projections, the sheave support portion 40d is inserted and held through the insertion groove 40c into which the sieve plate 31a is inserted, and the screening surface of the sieve support portion 40d is provided. The supporting part on the side is made shorter than the supporting part on the lower surface side, and it is set as the structure which inclined surface 40s so that it might incline to the swinging sorting inner side as it goes downward. According to this, compared with the structure of the conventional structure shown in FIG. 6, the substantial swing sorting width | variety in the lateral width direction of the chaff sieve 31 becomes enlarged, and sorting efficiency can be improved. In addition, the rib 40e is connected between the side walls of the insertion groove 40c to improve the strength of the sheave support member.

As shown in FIG. 5, the sheave plate 31a is formed to be bent in a substantially Z shape from the side to form two stepped stepped portions Q1 and Q2. The two-stage bending step portions Q1 and Q2 impart a drop resistance to the grains, and promote the flow of flowing down by actively sifting and dropping them by their own swinging action.

Moreover, the sheave support member of the conventional form becomes the support member 40 of the shape as shown in FIG. 6, and supports it so that rocking opening-closing is possible by inserting the Ko-shaped pin 41 from the outer side of the swinging side plates 39 and 39. FIG. It was a constitution.

In the embodiment shown in FIG. 7, the 1st chaff sheave 31 and the 2nd chaff sheave 33 are interlocked so that rocking opening and closing may be carried out simultaneously by the interlocking plate 42 arrange | positioned at the left and right both ends. That is, when the operation arm 43 is pushed and pulled by the wire 44 or the like, the linkage plate 42 moves in the front-rear direction, and each sheave plate of the first chaff sheave 31 and the second chaff sheave 33 ( 31a and 33a swing and open and close simultaneously along the long holes 31c and 33c of circular arcs, with the upper side as the rotational points 31b and 33b.

1 is a cutaway side view of the threshing apparatus.

2 is a plan view of a part of the threshing apparatus broken.

3 is a plan view of the oscillation screening device.

4 is a cutaway side view of the main part of the statue.

5 is a front view and a side view showing a support structure of the chaff sheave.

6 is a front view and a side view showing a support structure of a conventional chaff sheave.

It is a side sectional view of the principal part of the oscillation screening apparatus.

(Explanation of symbols for the main parts of the drawing)

2: threshing container 3: threshing chamber

4: water network 9: feed chain

10: first exhaust port 11: communication port

17: Dust collection chamber 18: Dust collection chamber

21: second exhaust port 24: oscillation screening device

25: 1st sorting fan 26: Spiral 1

27: 2nd sorting fan 28: 2nd spiral

29: suction exhaust fan 30: transfer lathe

31: first chaff sheave 32: first stroke rack

33: second chaff sheave 34: third chaff sheave

35: second stroke rack 35a: attachment plate

38: windshield 46: tuyere

A: first step B: second step

A: first blowing path b: second blowing path

C: 3rd blowing path r: 4th blowing path

Claims (3)

A threshing container 2 is installed in the threshing chamber 3; A water net 4 is provided below the threshing barrel 2; A first exhaust port 10 is provided at the rear end of the threshing chamber 3; A feed chain 9 is installed on one side of the threshing chamber 3; A dust treatment chamber 18 is provided on the side opposite to the side on which the feed chain 9 is installed in the threshing chamber 3; A dust treatment chamber 17 is provided in the dust treatment chamber 18; A communication port 11 for communicating the rear end of the threshing chamber 3 and the front end of the dust exhaust treatment chamber 18 is provided; A second dust exhaust port 21 is provided at the rear end of the dust exhaust treatment chamber 18; An oscillation screening device 24 is provided below the water network 4; A first sorting fan 25 is installed below the front part of the swing sorting device 24; A first helix 26 is provided on the rear side of the first sorting fan 25; Install helix 2 on the back side of helix 26; A suction backing fan 29 is provided above the rear portion of the swinging screening device 24; The swinging sorting device 24, A conveying shelf 30 in the front portion for conveying the processed material flowing down from the water net 4 to the rear; A first chaff sieve (31) installed at the rear side of the transfer shelf (30), for sifting and sorting the processed material transferred from the transfer shelf (30); A first stroke rack (32) installed at the rear side of the first chaff sieve (31) and sifting the processed matter discharged from the first dust discharge port (10); A second chaff sieve (33) installed below the first straw rack (32) for sorting while transporting the processed material sieved away from the first straw rack (32) to the rear; A third chaff sheave (34) installed at the rear side of the second chaff sheave (33), for sifting and filtering the processed material transferred from the second chaff sheave (33); And It is provided in the back side of the 3rd chaff sieve 34, and is comprised by the 2nd straw rack 35 which sorts the processed material discharged | emitted from the 2nd dust outlet 21, and sifts; The front end of the second chaff sheave 33 is provided at a position lower than the rear end of the first chaff sheave 31, and between the rear end of the first chaff sheave 31 and the front end of the second chaff sheave 33. To form a first step A; The front end of the third chaff sheave 34 is provided at a position lower than the rear end of the second chaff sheave 33, and between the rear end of the second chaff sheave 33 and the front end of the third chaff sheave 34. To form a second step B; Air blowers (38, 38) for dividing the air blowing path of the first sorting fan (25) in the up-down direction in the air outlet (46) of the first sorting fan (25); A first blowing path (a) in the upper part of which the sorting wind of the first sorting fan (25) passes through the first step (A) from below to the upper side of the suction dust collecting fan (29); A second blowing path (b) in the middle portion in which the sorting wind of the first sorting fan (25) passes through the second chaff sieve (33) from the lower side and is directed to the upper side of the suction dust collecting fan (29); And The threshing apparatus characterized in that the sorting wind of the 1st sorting fan (25) formed the lower 3rd blowing path (c) which passes the said 2nd step B upwards from below. A second sorting fan (27) provided between the first spiral (26) and the second spiral (28); The threshing apparatus characterized by forming the 4th blowing path (d) which the sorting wind of the 2nd sorting fan (25) passes through the 2nd straw rack (35) from below and toward the exterior of the upper threshing apparatus. 3. An attachment plate (35a) for attaching the second straw rack (35) to the swing sorting device (24) is provided; The lower end of the attachment plate 35a enters the fourth blowing path r; The threshing apparatus characterized by the above-mentioned attachment plate (35a) directing the sorting wind of the 2nd sorting fan (27) toward the 3rd chaff sheave (34).

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