JP2007267629A - Threshing device - Google Patents

Abstract

An object of the present invention is to improve the sorting performance of the first item.
A handling cylinder 31 is pivotally provided in a handling chamber 33, and an object to be treated that leaks from a handling net 30 below the handling chamber 33 is received by a swing sorting shelf 38 and is swing-transferred. In the threshing apparatus that performs oscillating sorting while swinging, the oscillating sorting shelf 38 is constituted by a transfer shelf 49, a grain sheave 38a, a chaff sheave 38b, and a strolac 38c from the upper side to the lower side in the conveying direction of the object to be processed. The threshing apparatus is composed of a front grain sieve P and a rear grain sieve Q.
[Selection] Figure 6

Description

  The present invention relates to a threshing device mounted on a combine or a harvester.

Swing in a threshing device that swings and sorts while moving and receiving the workpiece to be processed that leaks from the handling net below the handling chamber on the swing sorting shelf. The sorting shelf is composed of a transfer shelf, a grain sheave, a chaff sheave, and a stroll rack from the upper side to the lower side in the conveyance direction of the workpiece. And about the grain sheave between the transfer shelf and the chaff sheave, the pitch and the inclination angle are the same on the front side and the rear side. (For example, refer to Patent Document 1).
JP 2002-330616 A

  In the technology as described above, the material that falls from the grain sheave between the transfer shelf and the chaff sheave has a small amount of sawdust to some extent. There was a drawback that the sorting of was worse.

  The subject of this invention is providing the threshing apparatus which eliminated the above malfunctions and improved the selection performance of the sized particle | grains collect | recovered first.

The above object of the present invention is achieved by the following configuration.
That is, according to the first aspect of the present invention, the handling cylinder 31 is provided in the handling chamber 33 so as to be pivoted, and the workpiece to be leaked from the handling net 30 below the handling chamber 33 is moved by the swing sorting shelf 38. In the threshing device that receives and swings and moves while swinging, the swing sorting shelf 38 is composed of a transfer shelf 49, a grain sheave 38a, a chaff sheave 38b, and a stroll rack 38c from the upper side to the lower side in the conveying direction of the workpiece. The grain sieve 38a is constituted by a front grain sieve P and a rear grain sieve Q, which is a threshing device.

  According to the operation of the first aspect, the object to be processed threshed by the handling drum 31 in the handling chamber 33 falls on the swing sorting shelf 38 below the handling net 30. The object to be processed that has fallen on the swing sorting shelf 38 is swing-sorted while being conveyed to the transfer shelf 49, the front sheave P and the rear sheave Q, chaff sheave 38b, and Strollac 38c of the grain sheave 38a. The closer the front portion of the handling chamber 33 is, the less the threshing material is in the state of swarf, so that the grain having relatively less swarf falls downward from the front grain sheave P of the grain sheave 38a. Subsequently, grains with less swarf fall down from the rear grain sieve Q of the grain sieve 38a, but a little more swarf is mixed than the front grain sieve P.

  In the second aspect of the invention, the pitch interval D of the front grain sheave P is configured to be wider than the pitch interval E of the rear grain sheave Q, and the inclination angle H of the front grain sheave P is equal to the inclination angle of the rear grain sheave Q. The threshing apparatus according to claim 1, wherein the threshing apparatus is configured to be larger than I.

  In addition to the action of the first aspect, the action of the second aspect promotes the filtration from the rear grain sieve Q rather than the filtration from the front grain sieve P. Then, the transfer of the workpiece is better on the front grain sieve P than on the rear grain sieve Q.

  According to a third aspect of the present invention, the pitch interval D and the inclination angle H of the front grain sheave P are configured to be substantially the same as the pitch interval J and the inclination angle K of the transfer shelf 49. Item 3. A threshing apparatus according to item 2.

  The effect of the third aspect is that in addition to the action of the first or second aspect, the flow of the object to be processed from the transfer shelf 49 to the front grain sieve P becomes good.

  Since the present invention is configured as described above, in the invention according to claim 1, since the processed material that has been threshed has less waste as it becomes the front side portion of the handling chamber 33, the front grain sieve of the grain sieve 38 a. From P, the grain with relatively less sawdust falls down from earlier, so that the selection of the first grain to be recovered first is good. Subsequently, grains with less swarf fall down from the rear grain sieve Q of the grain sieve 38a, but a little more swarf is mixed than the front grain sieve P. However, since the object to be processed has already been processed to some extent in the front grain sieve P, the load is reduced when the object to be processed in the rear grain sieve Q is processed.

  In the second aspect of the invention, in addition to the effect of the first aspect, the filtration from the rear grain sieve Q is promoted more than the filtration from the front grain sieve P. Less. As a result, the best sorting is achieved.

  In the invention according to claim 3, in addition to the effect of claim 1 or 2, the flow of the object to be processed from the transfer shelf 49 to the front grain sheave P is improved, so that a large amount of the object to be processed fluctuates. Even if it falls on the sorting shelf 38, it becomes possible to prevent the object to be processed from clogging from the transfer shelf 49 to the front grain sieve P.

1 and 2 show a combine that is an agricultural machine that embodies the present invention.
A cutting device 3 is provided in front of the chassis 2 having the traveling device 1. The cutting device 3 includes a plurality of weeding tools 4 for weeding the planted cereal, a plurality of pulling devices 5 for causing the planted cereal, a cutting blade 6 for harvesting the planted cereal, and the cutting blade A conveying device 7 is provided which sandwiches the grain culm cut at 6 and conveys it to the rear. The conveying device 7 includes a stock transport device 8 behind the cutting blade 6 and a supply transport device 10 that takes over the cereal straw transported from the stock transport device 8 and supplies it to the threshing device 9.

  The reaping device 3 is supported by a reaping device support frame 12 that moves up and down about a rotating shaft 11a provided above a suspension base 11 standing on the front portion of the chassis 2 at its substantially left and right intermediate portions. . The reaping device 3 is configured to move up and down together with the reaping device support frame 12 by tilting a steering lever 14 provided in the operation unit 13 in the front-rear direction.

  Above the chassis 2, the threshing device 9 having a feed chain 15 that takes over and transports the cereals conveyed from the supply conveying device 10, and the right side of the threshing device 9, A grain tank 16 that temporarily stores the grain that has been threshed and an operation unit 13 that is positioned in front of the grain tank 16 and that performs various operations of the combine are mounted. A traveling transmission device 17 that drives the traveling device 1 is provided at the front of the chassis 2.

  Behind the threshing device 9 is a waste chain 18 that takes over and transports the waste that has been transported from the feed chain 15, and a cutter device 19 that cuts the waste after the end of the waste chain 18. Is provided. Moreover, you may mount | wear with other working machines, such as a knotter which binds a waste, behind the cutter apparatus 19 of this Example.

  When the grain amount in the Glen tank 16 is full, the grain is discharged from the milled cylinder 20 and the grain discharge auger 21 to the outside of the machine. The whipping cylinder 20 is configured to be turnable by an electric motor (not shown), and the grain discharge auger 21 is configured to be moved up and down by a hydraulic cylinder 22. And the grain discharge auger 21 is connected with the upper part of the whipping cylinder 20, and is comprised integrally, and when the whipping cylinder 20 turns, the grain discharge auger 21 also turns together.

  Further, the combine determines the position of the sub-shift in the travel transmission device 17 by operating the sub-transmission lever 23 provided in the operation unit 13, and then operates the travel shift lever 24 to drive power from the engine (not shown). Is transmitted to the left and right crawlers 26 and 26 of the traveling device 1 via the hydraulic continuously variable transmission and the traveling transmission device 17 to travel at an arbitrary speed. As described above, the speed is changed by the operation amount of the traveling speed change lever 24, and the combine is moved forward and backward by the forward and backward operations of the traveling speed change lever 24.

  The combine is configured to turn left and right by tilting the steering lever 14 provided in the operation unit 13 in the left-right direction, and further, the turning radius depends on the amount of tilting operation of the steering lever 14 in the left-right direction. It is a configuration to be determined.

  When the harvesting operation is performed by advancing such a combine, the cereals planted in the field scene are weeded by the weeding tool 4, and then caused by the pulling device 5 and by the cutting blade 6. It is a structure that is reaped. Thereafter, the harvested cereals are transported rearward by the stock transporter 8 and are handed over to the supply transporter 10. The cereal that has been handed over to the supply and transport device 10 is further transported rearward and is handed over to the feed chain 15 of the threshing device 9, and the cereal is transported rearward by the feed chain 15 to the threshing device 9. And threshing and sorting.

  The grain thus threshed and sorted is transported from the first lifting cylinder 27 into the Glen tank 16 and temporarily stored, and when the amount of grain stored in the Glen tank 16 is full, the operation unit In this configuration, 13 notification means (buzzer or display device) notify the operator. Thereafter, the cutting operation is interrupted, and the operation for discharging the grains in the Glen tank 16 to the outside of the machine is started. The combine is moved to an arbitrary position (position near the truck), the grain discharge auger 21 is detached from the auger receiver 28, and the grain discharge port 21a is moved to a position such as a truck bed. Then, the grain discharge lever 29 provided in the operation unit 13 is turned on, the grain in the Glen tank 16 is discharged to the outside of the machine, and when the grain discharge in the Glen tank 16 is finished, the grain discharge auger Reference numeral 21 denotes a configuration in which the auger receiver 28 is housed again.

The said threshing apparatus 9 is demonstrated based on FIGS.
FIG. 3 is a side view of the threshing device 9, and FIG. 4 is a plan view of the threshing device 9.
In the threshing device 9, a handling chamber 33 in which a handling cylinder 31 having a handling net 30 is mounted on a handling cylinder shaft 32, and a processed material from the rear of the handling chamber 33 is received on one side of the handling chamber 33. A dust removal treatment chamber 37 is provided in which a dust removal treatment cylinder 35 having a dust treatment network 34 to be processed is mounted on a dust removal treatment cylinder shaft 36. A swing sorting shelf 38 is provided below the handling chamber 33 and the dust removal processing chamber 37. 33a is a discharge port provided at the end of the handling chamber 33.

  A second processing chamber 41 including a second processing drum 39 and a second processing drum receiving rod 40 (which may be a net or a lattice) may be formed in front of the dust removal processing drum 35. In the present embodiment, the second processing cylinder 39 is one side (the Glen tank 16 side) of the handling cylinder 31 and is integrally formed with the dust processing cylinder 35 in front of the dust processing cylinder 35. The second processing cylinder 39 basically processes a second product. Since the second processing cylinder 39 is supported by the second processing cylinder shaft 42, the dust processing cylinder 35 and the second processing cylinder 39 are integrated with the dust processing cylinder shaft 36 and the second processing cylinder 39. The structure is supported by the processing cylinder shaft 42.

  Further, FIG. 5 is a cross-sectional view taken along the line AA shown in FIG. 4. Since the workpiece leaked from the handling net 30 is taken into the second processing chamber 41, the second processing cylinder 39 is In addition to the second object, the object to be processed that has entered from the inside of the handling chamber 33 is also processed. The handling net 30, the second treatment cylinder receiving rod 40 (which may be a net or a lattice), and the dust treatment net 34 are provided below the treatment cylinder 31, the second treatment cylinder 39, and the dust treatment cylinder 35, respectively. Yes.

  Below the handling chamber 33, the second processing chamber 41, and the dust removal processing chamber 37, an oscillating sorting shelf 38 that receives and sorts the falling objects to be sorted is installed. Is provided with a tang 43 on the start side of the sorting air feed direction, and an air passage 44 and an air passage 45 are provided on the lower side of the sorting air sent from the tang 43 in the feeding direction. The first spiral 46 is provided on the lower side of 44 and the air passage 45, and the second spiral 47 is provided on the lower side of the first spiral 46 in the sorting wind feed direction. A second lifting cylinder 48 is provided for lifting the second thing collected in the second helix 47 to the second processing chamber 41.

  The configuration of the swing sorting shelf 38 will be described. The swing sorting shelf 38 includes, in order from the start side in the sorting and feeding direction, a transfer shelf 49 for transferring the fallen cereals backward, a grain sheave 38a for sorting the cereals, a chaff sheave 38b for sorting the second thing, and dust. It is composed of a Strollac 38c that loosens and collects the scorpion grains and transports and discharges dust. Below the Strollac 38c is constituted by a second shelf tip 47a for guiding the second item into the second spiral 47, and the dust removal processing cylinder 35 extends to the vicinity of the terminal end of the second shelf tip 47a. It is the composition which has taken out. The suction fan 51 is for discharging light dust in the sorting chamber 50 to the outside of the machine, and is provided at a position facing the dust removal processing cylinder 35 with respect to the handling cylinder 31. Reference numeral 52 denotes a crankshaft that drives the swing sorting shelf 38 to swing.

  The cereals conveyed from the reaping device 3 are taken over by the start end of the feed chain 15 of the threshing device 9, and the cereals inherited by the feed chain 15 are transported rearward while It is threshed by the handling net 30. A part of the threshed threshing falls on the swing sorting shelf 38 and is sorted by the swinging action of the swing sorting shelf 38 and the wind sorting action from the Kara 43 and is taken into the spiral 46 first. Accordingly, the grain taken into the first spiral 46 is configured to be temporarily stored in the glen tank 16. After the threshing, the waste is handed over from the terminal end of the feed chain 15 to the start end of the waste chain 18 and then sent to the cutter 19 where it is cut and released onto the lower field. It has become.

  The remaining threshing in the handling chamber 31 is conveyed rearward, and a part of the threshing is taken into the second processing chamber 41 along the way. The threshing taken into the second processing chamber 41 is threshed by the interaction between the second processing cylinder 39 and the second processing cylinder receiving rod 40 (particularly, branch branch) The particles are processed) and fall onto the lower swing sorting shelf 38. The handling cylinder 31, the second processing cylinder 39, and the dust removal processing cylinder 35 are configured to rotate clockwise in a situation (a front view of the threshing device 9) when the lower side is viewed from the upper side in the sorting wind feed direction. Therefore, it is necessary to fix the direction of the processing teeth 39a of the second processing cylinder 39 in such a direction as to send the cereals in the upper direction of the sorting wind feed direction.

  That is, the processing teeth 39a have an action of conveying the workpiece to the upper side in the sorting air feed direction, and further have an action of processing the workpiece. That is, the processing tooth 39a is a part of a spiral, and is configured to process the object to be processed by the interaction between the circumferential tip portion thereof and the second processing cylinder receiving rod 40. The blades 39b provided at the conveying terminal end of the second processing cylinder 39 forcibly send the workpiece to the swing sorting shelf 38.

  The dust removal processing teeth 35a of the dust removal processing cylinder 35 need to be fixed in such a direction as to send the cereal from the rear part of the handling chamber 33 in the lower direction of the sorting wind feed direction. In the present embodiment, the dust removal treatment teeth 35 a have a spiral shape that is wound around the outer peripheral surface of the dust removal treatment cylinder 35.

  However, in this embodiment, since the dust disposal mesh 34 is rough (lattice), some short sawdust falls on the swing sorting shelf 38, and long sawdust that has not fallen is dust. It is transported to the end portion of the processing chamber 37 and is forcibly discharged onto the strola rack 38 c by the blade 35 b at the end portion of the dust removal processing cylinder 35. While the object to be processed is thus transported in the dust processing chamber 37, the dust processing cylinder 35, the processing teeth 35 c provided with the dust processing cylinder 35 and the dust processing net 34 are provided. Through the interaction, the threshing is further loosened, the threshing is loosened and the grains (so-called scorpion grains) mixed in are taken out and fall on the lower swing sorting shelf 38, and It is configured to be collected into the spiral 47.

  As described above, the remaining cereal that has not fallen on the swing sorting shelf 38 due to cerealing in the processing chamber 33 and that has not been taken into the second processing chamber 41 is conveyed to the end of the processing chamber 33. It will be done. The threshing that has been transported to the end of the handling chamber 33 is taken into the dust removal processing chamber 37, and the taken-in threshing is transported to the lower side in the sorting wind feed direction. Of the threshing that has been transported to the end of the handling chamber 33, the threshing that has not been taken into the dust disposal chamber 37 falls on the swinging sorting shelf 38 below.

  When the cereal is sent from the end portion in the handling chamber 33 into the dust removal processing chamber 37, the dust removal treatment cylinder is also provided at the takeover portion from the handling chamber 33 to the dust removal treatment chamber 37 so that the cereal removal is not clogged. Spiral-shaped dust removal processing teeth 35a are provided on the outer periphery of 35, and the take-off portion is prevented from being clogged by the feeding action of the dust removal processing teeth 35a.

  In spite of the swinging action of the swinging sorting shelf 38 and the action of the sorting wind from the red pepper 43, the remaining grains that are not taken into the spiral 46 are further collected together with other dusts. It is sent to the rear and taken into the second spiral 47. The second product taken into the second spiral 47 is reduced to the lower side in the sorting air feed direction of the second processing chamber 41 by the second lifting cylinder 48 and merged with the cereal from the handling chamber 33. Then, while being transported to the upper side of the sorting wind feed direction, it is transported while being threshed by the interaction with the second processing barrel receiving rod 40, and is placed on the lower swing sorting shelf 38 by the blade 39b at the end portion. It is the composition that falls forcibly.

FIG. 6 is a side view of the swing sorting shelf 38, and FIG. 7 shows the swing sorting shelf 38.
The pitch interval of the arrangement of the Glen sheave 38a is shorter than the pitch interval B of the rear chaff sheave 38b. In addition, each gap of the Glen sheave 38a is narrower than the gap C of the rear chaff sheave 38b. As a result, the processing object falling from the grain sieve 38a is reduced to a certain extent by reducing the amount of long swarf, and is then sorted by the sorting wind from the Karatsu 43. Grains are better sorted.

  The grain sieve 38a further includes a front grain sieve P and a rear grain sieve Q. And the pitch interval D of the arrangement | positioning of the front part granular sheave P is comprised narrowly with respect to the pitch interval E of arrangement | positioning of the rear rear part sheen sieve Q (when the inclination angle of the front part granular sieve P and the rear part granular sieve Q is substantially the same), Each gap F of the front grain sieve P is narrower than the gap G of the rear rear grain sieve Q.

  Accordingly, the amount of filtration of the object to be processed gradually increases from the front part to the rear part of the swing sorting shelf 38. Therefore, since it becomes possible to prevent the object to be processed from being guided onto the sorting net 38d in the state where the specific gravity sorting at the front part of the swing sorting shelf 38 is insufficient, the third loss can be reduced. become.

  Further, the inclination angle H of the front grain sieve P is configured to be larger than the inclination angle I of the rear grain sieve Q. In this case, the pitch interval D of the arrangement of the front grain sieve P is configured to be wider than the pitch interval E of the arrangement of the rear rear grain sieve Q. Thereby, in the grain sieve 38a (the front grain sieve P and the rear grain sieve Q), the filtration of the rear grain sieve Q is promoted more than the front grain sieve P, and the front grain sieve P is treated more than the rear grain sieve Q. Goods transfer is good.

  About the relationship between the pitch interval D of the arrangement | positioning of the said front grain sieve P, and the pitch interval B of the chaff sheave 38b, it is comprised so that it may become substantially the same pitch interval. The gap and the inclination angle between the front grain sheave P and the chaff sheave 38b are configured to be substantially the same or larger because the chaff sheave 38b is configured to be rotatable. is doing.

  As a result, the chaff sheave 38b is better filtered than the front grain sieve P, and can be recovered well before the object to be processed reaches the end of the swing sorting shelf 38. In addition, since the chaff sheave 38b is configured to be rotatable, the sheave inclination angle can be adjusted to substantially the same angle as the inclination angle of the front grain sheave P when working at a low flow rate. It becomes possible to prevent the sorting from deteriorating.

The relationship between the front grain sieve P and the transfer shelf 49 configured in front of the front grain sieve P will be described.
The pitch interval D and the inclination angle H of the front grain sieve P are configured to be substantially the same as the pitch interval J and the inclination angle K of the transfer shelf 49. Thereby, the flow of the to-be-processed object from the transfer shelf 49 to the front grain sieve P becomes favorable. Further, even when a large amount of objects to be processed is processed, occurrence of clogging and the like can be prevented, and damage to the drive system of the swing sorting shelf 38 can be prevented.

  58a and 58b shown in FIGS. 7 and 8 are a left-justified plate and a right-justified plate, respectively. The left alignment plate 58a and the right alignment plate 58b are configured to be provided on the above-described grain sieve 38a (the front granular sieve P and the rear granular sieve Q).

  As a result, the treatment object leveled to some extent on the transfer shelf 49 is further forcibly leveled on the front grain sieve P and the rear grain sieve Q, so that The object to be processed is properly filtered.

  The conveyance end portion (front end portion) of the second processing cylinder receiving rod 40 is configured to be forward of the left end plate 58a and the right end plate 58b with respect to the start end portion. That is, the second object falling from the second processing chamber 41 is configured to fall in front of the left alignment plate 58a and the right alignment plate 58b. As a result, the second item dropped on the transfer shelf 49 is once leveled on the transfer shelf 49 to some extent, and thereafter, is easily leveled on the front and rear sieves P and Q.

  As shown in FIG. 9, the front and rear length L of the transfer shelf 49 and the front and rear length M of the grain sieve 38 a (front grain sieve P and rear grain sieve Q) are configured to be substantially the same. Moreover, the grain sieve 38a (front grain sieve P and rear grain sieve Q) portion is a portion of the transfer shelf 49 portion that is conventionally constituted by the grain sieve 38a. Accordingly, since the workpiece is configured to be able to drop downward from many portions of the entire length of the swing sorting shelf 38, the processing capability is increased.

  As shown in FIG. 10, a left justifying plate 58a and a right justifying plate 58b are integrally formed on the front grain sieve P by welding. Furthermore, left and right plates 59a and 59b are fixed to the left and right ends of the front grain sieve P by welding. As shown in FIG. 11, the left and right plates 59 a and 59 b are attached to the left and right side walls 38 e and 38 f of the swing sorting shelf 38 with bolts 60.

  Thereby, since the grain sieve P, the left alignment plate 58a, and the right alignment plate 58b are integrally formed, the strength is improved. Further, since the swing sorting shelf 38 can be easily detached from the main body, inspection and maintenance work are facilitated.

  FIG. 12 is a view of the threshing device 9 as seen from the rear. The pulley 61, the belt 62, and the pulley 63 are a transmission system that drives the suction fan 51, and the pulley 64 and the belt 665 are a transmission system of the cutter device 19. The transmission system of the suction fan 51 and the cutter device 19 is configured to be covered with a cover 66. Further, the cover 66 is configured to cover a part of the chain cover 67 that covers the side portion from the start end portion to the rear portion of the feed chain 15.

As a result, the transmission system of the suction fan 51 and the cutter device 19 can prevent the influence of sawdust.
Further, since the lower cover 68 is provided on the lower side of the chain cover 67, it can be prevented from the influence of the wind blown from the lower side of the traveling device 1 or the like (wind containing dust). It becomes like this. Further, since the lower cover 68 is inclined downward, it is difficult for dust, dust and the like to collect on the lower cover 68.

  In this embodiment, the feed chain 15 is configured to turn sideways with the front side as a fulcrum. However, the cover 66, the chain cover 67, and the lower cover 68 described above are together with the feed chain 15. It is set as the structure rotated to the side. Thereby, the inspection work of the transmission system of the suction fan 51 and the cutter device 19 is facilitated.

Combine left side view Combine front view Side cross section of threshing device Top view of threshing device Cross section of threshing device front Side view of swing sorting shelf Top view of swing sorting shelf Front view of part of threshing device Side view of swing sorting shelf Side view of swing sorting shelf Front view of part of threshing device Rear view of threshing device

Explanation of symbols

9 Threshing device 30 Handling net 31 Handling cylinder 33 Handling chamber 38 Swing and sorting shelf 38a Glen sheave 38b Chaff sheave 38c Strollac D Pitch interval of front grenve E Pitch interval of rear glenve H Inclination angle of front glenve I Inclination angle of rear grenshave J Transfer shelf pitch interval K Transfer shelf inclination angle P Front glen sieve Q Rear glen sieve

Claims (3)

  A handling cylinder (31) is pivotally provided in the handling chamber (33), and an object to be processed that leaks from the handling net (30) below the handling chamber (33) is moved by a swing sorting shelf (38). In the threshing apparatus that receives and swings and moves while swinging, the swing sorting shelf (38) has a transfer shelf (49), a grain sheave (38a), and a chaff sheave (38b) from the upper side to the lower side in the conveying direction of the workpiece. ), A throller (38c), and the grain sieve (38a) comprises a front grain sieve (P) and a rear grain sieve (Q).   The pitch interval (D) of the front grain sieve (P) is configured to be wider than the pitch interval (E) of the rear grain sieve (Q), and the inclination angle (H) of the front grain sieve (P) is The threshing apparatus according to claim 1, wherein the threshing apparatus is configured to increase with respect to the inclination angle (I) of (Q).   The pitch interval (D) and the inclination angle (H) of the front grain sieve (P) are substantially the same as the pitch interval (J) and the inclination angle (K) of the transfer shelf (49). The threshing apparatus according to claim 1 or claim 2.

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