CN217509445U - Threshing device - Google Patents

Abstract

The utility model provides a threshing device, it can leak the impurity such as sand, dust of swing sieving mechanism's transport shelf from the threshing chamber and discharge the outside, reduces the contact frequency of cereal grain and impurity, suppresses the epidermis damage of cereal grain. A swing screening device (21) is arranged on the upper part of the screening chamber (20), the upper part of the swing screening device (21) is formed by a conveying shelf (22) composed of a plate-shaped body and a grain sieve (24) composed of a plurality of sieves, the conveying shelf (22) is provided with a plurality of first openings (50) or a plurality of second openings (51), the rear part of a discharge guide (27) composed of a plate-shaped body is fixed on the lower surface of the conveying shelf (22), and the discharge guide (27) extends towards the front lower side.

Description

Threshing device

Technical Field

The utility model relates to a threshing device who possesses swing sieving mechanism.

Background

Conventionally, in order to improve the quality of grains after threshing and screening, a technique has been proposed in which a plurality of plate-like sieves are provided at a predetermined interval in the left-right direction on the upper part of an oscillating screening device and on a grain pan of the oscillating screening device. (patent document 1)

In order to suppress the leakage of foreign matter such as straw chips mixed in grains leaked to the swing type sieving apparatus, there has been proposed a technique in which a sieving net woven in a lattice shape is provided on the upper portion of the swing type sieving apparatus, and a plurality of plate-like sieves spaced apart by a predetermined interval in the left-right direction are provided on a grain pan of the swing type sieving apparatus. (patent document 2)

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2006-81524

Patent document 2: japanese patent laid-open publication No. 2018-85958

SUMMERY OF THE UTILITY MODEL

However, in the techniques of patent documents 1 and 2, grains leaked from the threshing chamber to the conveying shelf of the swing sifting apparatus contact impurities such as sand and dust to damage the grain skin, and there is a risk that the commercial value of the grains is reduced.

Therefore, an object of the present invention is to provide a threshing apparatus that can discharge foreign substances such as sand and dust leaking from a threshing chamber to a transfer shelf of a swing sifting apparatus to the outside, thereby reducing the frequency of contact between grains and foreign substances and suppressing damage to the surface of grains.

The present invention for solving the above problems is as follows.

The utility model of technical solution 1 is a threshing device, which is provided with a screening chamber (20) at the lower side of a threshing chamber (10) for threshing the grain stalks, the screening chamber (20) screening the processing objects leaked from the threshing chamber (10), characterized in that,

a swing screening device (21) is provided above the screening chamber (20), the upper portion of the swing screening device (21) is formed by a transfer shelf (22) composed of a plate-shaped body and a grain sieve (24) composed of a plurality of sieves, the transfer shelf (22) is provided with a plurality of first openings (50) or a plurality of second openings (51), the rear portion of a discharge guide (27) composed of a plate-shaped body is fixed to the lower surface of the transfer shelf (22), and the discharge guide (27) extends toward the front lower side.

The utility model of technical proposal 2 is the threshing device according to technical proposal 1, which is characterized in that, a left side plate (26A) composed of a plate-shaped body is arranged at the left part of the upper surface of the transfer shelf (22), the left side plate (26A) extends towards the right rear side, a right side plate (26B) composed of a plate-shaped body is arranged at the right part of the upper surface of the transfer shelf plate (22), the right side plate (26B) extends towards the left rear side, in a plan view, the long axis of a first opening (50A) or a second opening (51A) which is arranged at the front left part of the upper surface of the transfer shelf (22) compared with the rear part of the discharge guide (27) is arranged to be parallel with the left side plate (26A), and the long axis of a first opening (50B) or a second opening (51B) which is arranged at the front right part is arranged to be parallel with the right side plate (26B).

The utility model of claim 3 is the threshing device according to claim 2, characterized in that, in a plan view, a long axis of a first opening (50C) or a second opening (51C) provided in a rear left portion of the upper surface of the transfer shelf (22) in comparison with a rear portion of the discharge guide (27) is set to be orthogonal to the left side plate (26A), and a long axis of a first opening (50D) or a second opening (51D) provided in a rear right portion is set to be orthogonal to the right side plate (26B).

The utility model of claim 4 is the threshing device according to any one of claims 1 to 3, wherein the transfer shelf (22) is formed by a planar portion (40) extending in a front-rear direction, an inclined surface portion (41) extending from a rear end portion of the planar portion (40) toward a rear upper side, and a vertical surface portion (42) extending from a rear end portion of the inclined surface portion (41) toward a lower side, in a left side view, and the first opening portion (50) is provided in the planar portion (40).

The utility model of claim 5 is the threshing device according to any one of claims 1 to 3, wherein the transfer shelf (22) is formed by a planar portion (40) extending in a front-rear direction, an inclined surface portion (41) extending from a rear end portion of the planar portion (40) toward a rear upper side, and a vertical surface portion (42) extending from a rear end portion of the inclined surface portion (41) toward a lower side, and the second opening portion (51) is provided in the inclined surface portion (41) in a left-view.

The utility model of claim 6 is the threshing device according to claim 4, wherein a third opening (52) is provided in the vertical surface portion (42).

The utility model of claim 7 is the threshing device according to any one of claims 1 to 3, characterized in that a rear portion of the discharge guide (27) is fixed to a rear portion of the lower surface of the transfer shelf (22).

Effect of the utility model

According to the utility model described in claim 1, the swing sifting device (21) is provided on the upper portion of the sifting chamber (20), the upper portion of the swing sifting device (21) is formed by the transfer shelf (22) made of a plate-like body and the grain sieve (24) made of a plurality of sieves, the transfer shelf (22) is provided with a plurality of first openings (50) or a plurality of second openings (51), the rear portion of the discharge guide (27) made of a plate-like body is fixed to the lower surface of the transfer shelf (22), and the discharge guide (27) is extended toward the lower side in the front, so that the foreign substances such as sand and dust leaking to the transfer shelf (22) can be discharged to the outside of the sifting chamber (20), the frequency of contact between the grains and the foreign substances is reduced, and the damage to the surface skin of the grains is suppressed.

According to the utility model described in claim 2, in addition to the effect of the utility model described in claim 1, the left side plate (26A) is provided on the left side of the upper surface of the transfer shelf (22), the left side plate (26A) is formed of a plate-like body extending toward the rear right side, the right side plate (26B) is provided on the right side of the upper surface of the transfer shelf (22), the right side plate (26B) is formed of a plate-like body extending toward the rear left side, and in a plan view, the major axis of the first opening (50A) or the second opening (51A) provided on the upper surface of the transfer shelf (22) and closer to the front left side than the rear portion of the discharge guide (27) is set to be parallel to the left side plate (26A), and the major axis of the first opening (50B) or the second opening (51B) provided on the front right side is set to be parallel to the right side plate (26B), whereby the foreign substances efficiently transported along the left side plate (26A) and right side plate (26B) can be efficiently discharged And discharged to the outside of the sorting chamber (20).

According to the utility model described in claim 3, in addition to the effects of the utility model described in claim 2, in a plan view, the long axis of the first opening (50C) or the second opening (51C) provided in the rear left portion of the rear portion of the discharge guide (27) on the upper surface of the transfer shelf (22) is set to be orthogonal to the left side plate (26A), and the long axis of the first opening (50D) or the second opening (51D) provided in the rear right portion is set to be orthogonal to the right side plate (26B), whereby grains having grains transferred along the left side plate (26A) and the right side plate (26B) can be prevented from leaking from the first opening (50C) and the like and efficiently transferred to the grain sieve (24).

According to the utility model described in claim 4, in addition to the effects of the utility model described in any one of claims 1 to 3, in a left side view, the transfer shelf (22) is formed by the plane portion (40) extending in the front-rear direction, the inclined surface portion (41) extending from the rear end portion of the plane portion (40) toward the rear upper side, and the vertical surface portion (42) extending from the rear end portion of the inclined surface portion (41) toward the lower side, and the first opening portion (50) is provided in the plane portion (40), so that the foreign substances leaking to the transfer shelf (22) can be efficiently discharged to the outside of the screening chamber (20).

According to the utility model described in claim 5, in addition to the effects of the utility model described in any one of claims 1 to 3, in a left-view, the transfer shelf (22) is formed by the plane portion (40) extending in the front-rear direction, the inclined surface portion (41) extending from the rear end portion of the plane portion (40) toward the rear upper side, and the vertical surface portion (42) extending from the rear end portion of the inclined surface portion (41) toward the lower side, and the second opening portion (51) is provided in the inclined surface portion (41), so that the foreign substances leaking to the transfer shelf (22) can be efficiently discharged to the outside of the screening chamber (20).

According to the utility model of claim 6, in addition to the effect of the utility model of claim 4, since the third opening portion 52 is provided in the vertical surface portion 42, foreign substances leaking to the transfer shelf 22 can be efficiently discharged to the outside of the sieving chamber 20.

According to the utility model of claim 7, in addition to the effects of the utility model described in any one of claims 1 to 3, since the rear portion of the discharge guide (27) is fixed to the rear portion of the lower surface of the transfer shelf (22), foreign substances leaking to the transfer shelf (22) can be further efficiently discharged to the outside of the screening chamber (20).

Drawings

Fig. 1 is a front view of a combine harvester.

Fig. 2 is a left side view of the combine.

Fig. 3 is a top view of the combine.

Fig. 4 is a longitudinal sectional view in the front-rear direction of the threshing device according to the first embodiment.

Figure 5 is a top view of the oscillating screen apparatus.

Fig. 6(a) is a plan view of a gap of a plane portion of the transfer shelf, and fig. 6(b) is a left side view of the transfer shelf.

Fig. 7 is a plan view of another slit for transferring the flat surface portion of the shelf.

Fig. 8 is a plan view of another slit in the planar portion of the transfer shelf.

Fig. 9(a) is a plan view of a gap of the inclined surface portion of the transfer shelf, and fig. 9(b) is a left side view of the transfer shelf.

Fig. 10 is a plan view of another slit for transferring the slope part of the shelf.

Fig. 11 is a plan view of another slit of the inclined surface portion of the transfer shelf.

Fig. 12(a) is a plan view of a slit of a vertical surface portion of the transfer shelf, fig. 12(b) is a rear view of the slit of the vertical surface portion, and fig. 12(c) is a left side view of the transfer shelf.

Fig. 13(a) is a plan view of another slit in the vertical surface portion of the transfer shelf, and fig. 13(b) is a rear view of the other slit in the vertical surface portion.

Fig. 14(a) is a plan view of another gap in the vertical surface portion of the transfer shelf, and fig. 14(b) is a rear view of another gap in the vertical surface portion.

Fig. 15 is a longitudinal sectional view in the front-rear direction of the threshing device according to the second embodiment.

Description of the reference symbols

10: a threshing chamber; 20: a screening chamber; 21: swinging the screening device; 22: a transfer shelf; 24: screening grains; 26A: a left side plate; 26B: a right side plate; 27: a discharge guide; 40: a planar portion; 41: an inclined plane part; 42: a vertical face; 50: a slit (first opening portion); 51: a slit (second opening portion); 52: a slit (third opening).

Detailed Description

As shown in fig. 1 to 3, a general-purpose combine is provided with a traveling device 2 composed of a pair of left and right crawler belts that travel on the soil surface on the lower side of a body frame 1, a pre-harvest treatment device 3 that harvests grain stalks in a field on the front side of the body frame 1, a threshing device 4 that performs threshing and sorting treatment on the harvested grain stalks on the left rear side of the pre-harvest treatment device 3, and an operating unit 5 on which an operator rides on the right rear side of the pre-harvest treatment device 3.

An engine room 6 with an engine is provided below the operation part 5, a grain tank 7 for storing grains after threshing and screening is provided behind the operation part 5, and a discharge auger 8 for discharging grains to the outside is provided behind the grain tank 7.

The pre-harvest processing apparatus 3 includes a conveyor 3A, a cutter 3B, an auger device 3C, and a feeding chamber 3D, the conveyor 3A conveys the grain stalks to the rear side while raising the grain stalks in the field, the cutter 3B cuts the roots of the grain stalks conveyed to the lower portion of the rear side of the conveyor 3A, the auger device 3C collects the grain stalks conveyed to the rear side of the conveyor 3A to the left side, and the feeding chamber 3D conveys the collected grain stalks to the threshing device 4.

< threshing apparatus according to first embodiment >

As shown in fig. 4, the threshing apparatus 4 according to the first embodiment is formed of a threshing chamber 10 for threshing stalks and a screening chamber 20 for screening grains after threshing.

A threshing roller 11 for threshing the grain stalks fed from the feeding chamber 3D is provided on the front wall and the rear wall of the threshing chamber 10, and a receiving net 12 formed in a semicircular arc shape along the lower portion of the outer periphery of the threshing roller 11 is provided below the threshing roller 11. The upper part of the threshing cylinder 11 is covered with an openable and closable threshing cylinder cover (not shown), and a dust feeding plate for guiding the grain stalks to the rear part of the threshing chamber 10 is provided on the inner peripheral part of the threshing cylinder cover.

An oscillating sifting device 21 for sifting grains leaked from the threshing chamber 10 is provided above the sifting chamber 20.

As shown in fig. 5, the following are provided in order from the front side in the upper part of the swing screen apparatus 21: a transfer shelf 22 formed of a plate-like body; a screen body 23 formed of round bars arranged in parallel at a predetermined interval in the left-right direction and extending in the front-rear direction; a grain sieve 24 formed of a plurality of sieves which are arranged in parallel at predetermined intervals in the front-rear direction, inclined in the up-down direction, and extending in the left-right direction; and a straw screen 25 formed of a plurality of screens arranged in parallel at predetermined intervals in the left-right direction and extending in the front-rear direction. The inclination angle (opening degree) of the sieve of the grain sieve 24 can be changed by operating the rod provided in the operation unit 5 according to the type of the harvested grain straw. Thus, the screening efficiency can be maintained at a high level regardless of the kind of harvested rice straw.

A left side plate 26A is provided at the left portion of the transfer shelf 22, the left side plate 26A extends to the right rear side and guides the grain stalks or the like conveyed to the transfer shelf 22 to the center portion in the left-right direction, and a right side plate 26B is provided at the right portion of the transfer shelf 22, the right side plate 26B extends to the left rear side and guides the grain stalks or the like conveyed to the transfer shelf 22 to the center portion in the left-right direction. In the present specification, the left side plate 26A and the right side plate 26B are collectively referred to as a side plate 26.

As shown in fig. 4, a discharge guide 27 extending forward and downward from a middle portion of the transfer shelf 22 in the front-rear direction is provided on the lower side of the transfer shelf 22. The length of the discharge guide 27 in the left-right direction is the length of the transfer shelf 22 in the left-right direction, and the discharge guide 27 reaches the upper front portion of the fan cover 30A from the middle portion of the transfer shelf 22 in the front-rear direction through the upper side of the fan 30. This allows foreign matter such as sand and dust that has leaked through the slits 50 formed in the transfer shelf 22 to be discharged to the outside of the sorting chamber 20.

A grain pan 28 is provided at the lower part of the oscillating screen 21, and the grain pan 28 is formed into a bucket shape that receives grains and the like that have leaked from the upper part.

On the lower side of the swing screen device 21, there are provided in order from the front side: a fan 30 that sends the screening air to the swing screening device 21; a wind cutter 31 for changing the blowing direction of the screen wind to the rear of the fan 30; a first screw 32 for conveying the grains leaked from the oscillating screen 21 to the grain tank 7; and a second screw 33 for conveying again the grains adhered with branches and the like and leaking from the rear part of the swing sifting apparatus 21 to the sifting shelf at the front part of the swing sifting apparatus 21.

(gap of plane part of transfer shelf)

As shown in fig. 6(a) and 6(b), the transfer shelf 22 is formed, as viewed from the left, by a flat surface portion 40, a slant surface portion 41, and a vertical surface portion 42, the flat surface portion 40 extending horizontally in the front-rear direction, the slant surface portion 41 extending rearward and upward from a rear end portion of the flat surface portion 40, and the vertical surface portion 42 extending downward from a rear end portion of the slant surface portion 41.

A left slit 50A is formed in the plane portion 40 of the transfer shelf 22 located at the front left portion, the left slit 50A having a long axis extending substantially parallel to the left side plate 26A, and a right slit 50B is formed in the plane portion 40 of the transfer shelf 22 located at the front right portion, the right slit 50B having a long axis extending substantially parallel to the right side plate 26B. Thus, the foreign matter such as sand and dust transferred along the left side plate 26A of the transfer shelf plate 22 can be efficiently leaked out from the left slit 50A, and the foreign matter such as sand and dust transferred along the right side plate 26B of the transfer shelf plate 22 can be efficiently leaked out from the right slit 50B, so that the frequency of contact between grains of soybeans and mung beans and the foreign matter such as sand and dust can be reduced, and soft skin damage of the grains can be suppressed. The upper portion of the discharge guide 27 is fixed to a portion of the lower surface of the transfer shelf 22, which is opposed to the second vertical surface portion 42 from the front side.

A left slit 50C is formed in the planar portion 40 of the transfer shelf 22 located at the front left portion, the left slit 50C having a long axis extending substantially perpendicularly to the left side plate 26A, and a right slit 50D is formed in the planar portion 40 of the transfer shelf 22 located at the front right portion, the right slit 50D having a parallel long axis extending substantially perpendicularly to the right side plate 26B. This prevents the valley bars transferred along the left side plate 26A of the transfer shelf 22 from leaking through the left slit 50C and prevents the valley bars transferred along the right side plate 26B of the transfer shelf 22 from leaking through the right slit 50D. Further, since the sifting air from the fan 30 is blown toward the upper surface of the transfer shelf 22 through the slits 50C and 50D, the grain stalks on the transfer shelf 22 can be efficiently transferred to the screen body 23 and the grain screen 24. Further, the left slit 50C and the right slit 50D may be formed in the same shape as the left slit 50A and the right slit 50B, respectively. This allows the slits 50A to 50D to be easily formed in the planar portion 40.

In the present specification, the left slit 50A, the right slit 50B, the left slit 50C, and the right slit 50D are collectively referred to as a slit 50 (a "first opening portion" according to the embodiment). The slit 50 may be formed together with the slits 51 and 52 described later, or may be formed separately.

Fig. 7 illustrates the left half of the transfer shelf 22. As shown in fig. 7, a left slit 50A may be formed in the flat surface portion 40 of the transfer shelf 22 located at the front left portion, the left slit 50A having a long axis extending in the front-rear direction, and a left slit 50C may be formed in the flat surface portion 40 of the transfer shelf 22 located at the rear left portion, the left slit 50C having a long axis extending in the front-rear direction. Similarly, a right slit 50B may be formed in the planar portion 40 of the transfer shelf 22 located at the front right portion, the right slit 50B having a long axis extending in the front-rear direction, and a right slit 50D may be formed in the planar portion 40 of the transfer shelf 22 located at the rear right portion, the right slit 50D having a long axis extending in the front-rear direction. This allows the slit 50 to be easily formed in the flat surface portion 40. Further, the foreign matter such as sand and dust transferred from the intermediate portion in the left-right direction of the transfer shelf 22 can be efficiently leaked through the left slit 50A and the right slit 50B, and the valley bars transferred from the intermediate portion in the left-right direction of the transfer shelf 22 at a predetermined angle with respect to the front-rear direction can be prevented from leaking through the left slit 50C and the right slit 50D.

Fig. 8 illustrates the left half of the transfer shelf 22. As shown in fig. 8, a left slit 50A may be formed in the flat surface portion 40 of the transfer shelf 22 located at the front left portion, the left slit 50A having a long axis extending in the left-right direction, and a left slit 50C may be formed in the flat surface portion 40 of the transfer shelf 22 located at the rear left portion, the left slit 50C having a long axis extending in the left-right direction. Similarly, a right slit 50B may be formed in the flat surface portion 40 of the transfer shelf 22 located at the front right portion, the right slit 50B having a long axis extending in the left-right direction, and a right slit 50D may be formed in the flat surface portion 40 of the transfer shelf 22 located at the rear right portion, the right slit 50D having a long axis extending in the left-right direction. This allows the slit 50 to be easily formed in the flat surface portion 40. Further, the foreign matter such as sand and dust transferred from the intermediate portion in the left-right direction of the transfer shelf 22 can be efficiently leaked from the left slit 50A and the right slit 50B, and the valley bars transferred from the intermediate portion in the left-right direction of the transfer shelf 22 at a predetermined angle with respect to the front-rear direction can be prevented from being leaked from the left slit 50C and the right slit 50D.

(gap of inclined plane part of transfer shelf)

As shown in fig. 9(a) and 9(B), a left slit 51A is formed in the inclined surface portion 41 of the transfer shelf 22 located at the front left portion, the left slit 51A having a long axis extending substantially parallel to the left side plate 26A, and a right slit 51B is formed in the inclined surface portion 41 of the transfer shelf 22 located at the front right portion, the right slit 51B having a long axis extending substantially parallel to the right side plate 26B. Accordingly, since the length of the inclined surface portion 41 in the front-rear direction is generally longer than the length of the planar portion 40 in the front-rear direction, foreign matter such as sand or dust transferred along the left side plate 26A of the transfer shelf 22 can be more efficiently leaked out from the left slit 51A, and foreign matter such as sand or dust transferred along the right side plate 26B of the transfer shelf 22 can be efficiently leaked out from the right slit 51B, so that the frequency of contact between grains of soybeans or mung beans and foreign matter such as sand or dust is reduced, and soft skin damage of the grains can be further suppressed. The upper portion of the discharge guide 27 is fixed to a portion of the lower surface of the transfer shelf 22, which is opposed to the second vertical surface portion 42 from the front side.

A left slit 51C is formed in the inclined surface portion 41 of the transfer shelf 22 located at the front left portion, the left slit 51C having a long axis extending substantially perpendicularly to the left side plate 26A, and a right slit 51D is formed in the inclined surface portion 41 of the transfer shelf 22 located at the front right portion, the right slit 51D having a parallel long axis extending substantially perpendicularly to the right side plate 26B. This prevents the grain bars transferred along the left side plate 26A of the transfer shelf 22 from leaking through the left slit 51C, and prevents the grain bars transferred along the right side plate 26B of the transfer shelf 22 from leaking through the right slit 51D. Further, since the sifting air from the fan 30 is blown toward the upper surface of the transfer shelf 22 through the slits 51C and 51D, the grain stalks on the transfer shelf 22 can be efficiently transferred to the screen body 23 and the grain screen 24. Further, the left slit 51C and the right slit 51D may be formed in the same shape as the left slit 51A and the right slit 51B, respectively. This allows the slits 51A to 51D to be easily formed in the inclined surface portion 41.

In the present specification, the left slit 51A, the right slit 51B, the left slit 51C, and the right slit 51D are collectively referred to as a slit 51 (a "second opening portion" according to the embodiment). The slit 51 may be formed together with the slit 50 and a slit 52 described later, or may be formed separately.

Fig. 10 illustrates the left half of the transfer shelf 22. As shown in fig. 10, a left slit 51A may be formed in the inclined surface portion 41 of the transfer shelf 22 located at the front left portion, the left slit 51A having a long axis extending in the front-rear direction, and a left slit 51C may be formed in the inclined surface portion 41 of the transfer shelf 22 located at the rear left portion, the left slit 51C having a long axis extending in the front-rear direction. Similarly, a right slit 51B may be formed in the inclined surface portion 41 of the transfer shelf 22 located on the front right side, the right slit 51B having a long axis extending in the front-rear direction, and a right slit 51D may be formed in the inclined surface portion 41 of the transfer shelf 22 located on the rear right side, the right slit 51D having a long axis extending in the front-rear direction. This enables the slit 51 to be easily formed in the inclined surface portion 41. Further, the foreign matter such as sand and dust transferred from the intermediate portion in the left-right direction of the transfer shelf 22 can be effectively leaked through the left slit 51A and the right slit 51B, and the valley bars transferred from the intermediate portion in the left-right direction of the transfer shelf 22 at a predetermined angle with respect to the front-rear direction can be prevented from leaking through the left slit 51C and the right slit 51D.

Fig. 11 illustrates the left half of the transfer shelf 22. As shown in fig. 11, a left slit 51A may be formed in the inclined surface portion 41 of the transfer shelf 22 located at the front left portion, the left slit 51A having a long axis extending in the left-right direction, and a left slit 51C may be formed in the inclined surface portion 41 of the transfer shelf 22 located at the rear left portion, the left slit 51C having a long axis extending in the left-right direction. Similarly, a right slit 51B may be formed in the inclined surface portion 41 of the transfer shelf 22 located at the front right portion, the right slit 51B having a long axis extending in the left-right direction, and a right slit 51D may be formed in the inclined surface portion 41 of the transfer shelf 22 located at the rear right portion, the right slit 51D having a long axis extending in the left-right direction. This enables the slit 51 to be easily formed in the inclined surface portion 41. Further, the foreign matter such as sand and dust transferred from the intermediate portion in the left-right direction of the transfer shelf 22 can be effectively leaked through the left slit 51A and the right slit 51B, and the valley bars transferred from the intermediate portion in the left-right direction of the transfer shelf 22 at a predetermined angle with respect to the front-rear direction can be prevented from leaking through the left slit 51C and the right slit 51D.

(gap of vertical face for transfer shelf)

Fig. 12(a), 12(b), and 12(c) show the left half of the transfer shelf 22. As shown in fig. 12 a, 12 b, and 12 c, a slit 52 ("third opening" in the present embodiment) is formed in the vertical surface portion 42 of the transfer shelf 22, and the slit 52 has a long axis extending at a predetermined angle with respect to the vertical direction. Accordingly, foreign matter such as sand and dust transferred to the plane portion 40 of the transfer shelf 22 can be efficiently leaked from the slit 52, and can be prevented from staying at the corner portion of the plane portion 40 and the vertical surface portion 42, so that the frequency of contact between grains of soybeans and mung beans and foreign matter such as sand and dust can be reduced, and soft skin damage of grains can be suppressed. Further, the grain stalks transferred to the flat surface 40 can be prevented from leaking from the slits 52 and transferred to the rear screen body 23 and grain screen 24, and a high grain recovery efficiency can be maintained. The slit 52 may be formed together with the slits 50 and 51, or may be formed separately.

Fig. 13(a) and 13(b) illustrate the left half of the transfer shelf 22. As shown in fig. 13(a) and 13(b), a slit 52 is formed in the vertical surface portion 42 of the transfer shelf 22, and the slit 52 has a long axis extending in the vertical direction. This enables the slit 52 to be easily formed in the vertical surface portion 42.

Fig. 14(a) and 14(b) show the left half of the transfer shelf 22. As shown in fig. 14(a) and 14(b), a slit 52 is formed in the vertical surface portion 42 of the transfer shelf 22, and the slit 52 has a long axis extending in the left-right direction. This enables the slit 52 to be easily formed in the vertical surface portion 42.

< threshing apparatus according to second embodiment >

A threshing apparatus 4 of a second embodiment is illustrated in fig. 15. The same components are denoted by the same reference numerals and descriptions thereof are omitted.

A discharge guide 27 extending forward and downward from a rear end portion of the transfer shelf 22 in the front-rear direction is provided below the transfer shelf 22. The length of the discharge guide 27 in the left-right direction is the length of the transfer shelf 22 in the left-right direction, and the discharge guide 27 reaches the upper front portion of the fan cover 30A from the middle portion of the transfer shelf 22 in the front-rear direction through the upper side of the fan 30. This allows all foreign matter such as sand and dust that has leaked through the slits 50 formed in the transfer shelf 22 to be discharged to the outside of the sorting chamber 20. As described above, the slit 50 is formed in the flat surface portion 40 of the transfer shelf 22, the slit 51 is formed in the inclined surface portion 41, and the slit 52 is formed in the vertical surface portion 42.

Claims (7)

1. A threshing device comprising a screening chamber (20) below a threshing chamber (10) for performing threshing of grain stalks, the screening chamber (20) performing screening of a processed material leaked from the threshing chamber (10),

a swinging screening device (21) is arranged at the upper part of the screening chamber (20),

the upper part of the swing screening device (21) is formed by a conveying shelf (22) composed of a plate-shaped body and a grain sieve (24) composed of a plurality of sieves,

the transfer shelf (22) is provided with a plurality of first openings (50) or a plurality of second openings (51),

the rear part of a discharge guide (27) formed by a plate-shaped body is fixed on the lower surface of the transfer shelf (22), and the discharge guide (27) extends towards the front lower side.

2. Threshing apparatus according to claim 1,

a left side plate (26A) formed by a plate-shaped body is arranged at the left part of the upper surface of the transfer shelf (22), the left side plate (26A) extends towards the right rear side,

a right side plate (26B) formed by a plate-shaped body is arranged at the right part of the upper surface of the transfer shelf (22), the right side plate (26B) extends towards the left rear side,

in a plan view, the long axis of a first opening (50) or a second opening (51) provided on the front left portion of the upper surface of the transfer shelf (22) with respect to the rear portion of the discharge guide (27) is set parallel to the left side plate (26A), and the long axis of the first opening (50) or the second opening (51) provided on the front right portion is set parallel to the right side plate (26B).

3. Threshing apparatus according to claim 2,

in a plan view, the long axis of a first opening (50) or a second opening (51) provided on the rear left portion of the upper surface of the transfer shelf (22) with respect to the rear portion of the discharge guide (27) is set to be orthogonal to the left side plate (26A), and the long axis of the first opening (50) or the second opening (51) provided on the rear right portion is set to be orthogonal to the right side plate (26B).

4. Threshing apparatus according to any one of claims 1 to 3,

the transfer shelf (22) is formed by a plane part (40) extending in the front-back direction, a slope part (41) extending from the rear end part of the plane part (40) to the back upper side, and a vertical surface part (42) extending from the rear end part of the slope part (41) to the lower side,

the first opening (50) is provided in the planar portion (40).

5. Threshing apparatus according to any one of claims 1 to 3,

the transfer shelf (22) is formed by a plane part (40) extending in the front-back direction, a slope part (41) extending from the rear end part of the plane part (40) to the back upper side, and a vertical surface part (42) extending from the rear end part of the slope part (41) to the lower side,

the second opening (51) is provided in the inclined surface section (41).

6. Threshing apparatus according to claim 4,

a third opening (52) is provided in the vertical surface (42).

7. Threshing apparatus according to any one of claims 1 to 3,

the rear part of the discharge guide (27) is fixed to the rear part of the lower surface of the transfer shelf (22).

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