JP2006050994A - Grain separation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To keep a balance between layered separation and air separation and to exhibit excellent separation performance in a grain separation apparatus having chaff sieves constituted of upper and lower two steps. <P>SOLUTION: The grain separation apparatus 1 is equipped with a shaking separation body 21 having chaff sieves 7 and 8 and with a pressure air fan 12 blowing separation air ahead of the shaking separation body 21. The chaff sieves 7 and 8 are constituted of a plurality of fins 7a, 7b, 8a and 8b and grain is dropped from gaps between the fins. The chaff sieves 7 and 8 are constituted of upper and lower two steps, air guiding bodies 7c and 8c for introducing separation air upward are arranged at the rear parts of the chaff sieves 7 and 8 and the air guiding body 7c of the upper chaff sieve 7 is arranged ahead of the air guiding body 8c of the lower chaff sieve 8. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a grain sorting device provided in a combine or a harvester.

  2. Description of the Related Art A grain sorting device is known that includes a rocking sorter that rocks and sorts grain and a compressed air fan that generates a sorting wind in front of the rocking sorter. Usually, the rocking sorter is provided with a chaff sheave comprising a plurality of fins, and the grains transferred onto the chaff sheave are subjected to layered sorting (specific gravity sorting) along with the rocking of the rocking sorter. The wind is sorted by the sorting wind that blows between the fins.

In addition, a grain sorting device in which chaff sheaves are configured in two upper and lower stages is also known (for example, see Patent Document 1). According to the grain sorting apparatus configured as described above, since the layered sorting by the chaff sheave can be performed in two stages, the sorting accuracy and the sorting efficiency can be improved.
JP-A-6-169633

  However, if the chaff sheave is configured in two upper and lower stages as in Patent Document 1, the blow-up of the sorting wind is deteriorated, so that the balance between the layered sorting and the wind sorting is lost, and the sorting accuracy may be lowered. Although there is a method of adjusting the balance between the layered sorting and the wind sorting based on the fin opening control of the chaff sheave, in this case, there is a problem that the adjustment takes time.

The present invention has been made in order to solve these problems in view of the above-described circumstances, and includes a rocking sorter having a chaff sheave, and a sorting wind that is generated in front of the rocking sorter. In the grain sorting device in which the chaff sheave is configured with a plurality of fins and leaks the grain from the gap between the fins, the chaff sheave is configured in two upper and lower stages, and the upper stage and An air guide body for guiding the sorting air upward is provided at the rear of the lower chaff sheave, and the air guide body of the upper chaff sheave is arranged in front of the air guide body of the lower chaff sheave. In this way, although the chaff sheave is configured in two upper and lower stages, it is possible to urge the blowing air of each chaff sheave to be blown, and the upper chaff sheave air guide body is forward of the lower chaff sheave air guide body. By arranging, the sorting wind can be efficiently blown over a wide range. Thereby, even if the chaff sheave is configured in two upper and lower stages, it is possible to maintain a balance between the layered sorting and the wind sorting and to exhibit a good sorting performance.
The chaff sheave includes a movable fin having a variable fin angle and a fixed fin having a fixed fin angle, and the air guide body is provided on a fixed fin of the upper and lower chaff sheaves. If it does in this way, while performing fin opening adjustment by a movable fin, a selection wind can be blown up in a fixed direction with a wind guide, and stable wind selection can be performed.
Further, the lower chaff sheave air guide is arranged along the most flow plate. In this way, the chaff sheave is placed up to the top of the flow plate to prevent falling off of the first mouth, etc. It can be blown up to the vicinity of the top board. Thereby, the increase in the number 3 scattering due to insufficient height of the sorting wind can be prevented.
Further, the air guide body of the upper chaff sheave is arranged toward the tip of the dust exhaust air passage top plate. In this way, the sorting air can be guided to the dust exhaust port without being blown through the fourth port. Thereby, the efficiency of a dust exhaust fan can be raised and the silence of a dust exhaust fan can be improved.

  Next, embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a grain sorting device. The grain sorting device 1 includes a threshing feed chain 3 for sandwiching and transporting stems and stems along a handling chamber 2, and an object to be sorted (including a mixture). A barrel 4 for threshing the grain), a receiving net 5 for leaking the threshed material to be sorted, an oscillating flow plate 6 for sequentially oscillating and conveying the material to be sorted leaked from the receiving net 5; Chaff sheaves 7 and 8 that perform layered sorting (specific gravity sorting) of the objects to be sorted at the end of the oscillating flow plate 6, grain sieves 9 that screen the objects to be sorted that have leaked from the chaff sheaves 7 and 8, and the grain sieves The first flow plate 11 before and after the first flow plate 11 leading the grain that has leaked from the first flow to the spiral 10, the compressed air fan 12 that generates the sorting air in front of the first flow plate 11, and the chaff sheave 7 and 8 are disposed on the rear side of the strok rack 13 and the objects to be sorted leaked from the strok rack 13 A second flow plate 15 having a low front and rear height leading to the spiral 14, a second sorting fan 16 for generating a sorting wind in front of the second spiral 14, and a dust discharge chamber configured at the end of the sorting chamber 17, a dust exhaust fan 18 provided in the dust exhaust chamber 17, and a waste chain 20 that discharges and conveys the waste that has been threshed to the outside through the fourth port 19. Yes.

  The oscillating flow plate 6, the chaff sheaves 7 and 8, the grain sheave 9, the first flow plate 11, the strok rack 13 and the second flow plate 15 are provided on the oscillating sorter 21. The swing sorting body 21 is swingably supported in the sorting chamber, and is continuously reciprocated at a predetermined cycle by a swing mechanism 22 including a crank mechanism or a cam mechanism.

  The chaff sheaves 7 and 8 are configured in two upper and lower stages with a predetermined interval. That is, the grain transferred rearward from the oscillating flow plate 6 is subjected to the layered selection at the upper chaff sheave 7 and then falls onto the lower chaff sheave 8 where the grain sieve 9 is subjected to the second layered selection. Fall on top. Thereby, the layered sorting by the chaff sheaves 7 and 8 can be performed in two stages, and the sorting accuracy and sorting efficiency can be improved. In this embodiment, the grain leaked from the lower chaff sheave 8 is further screened by the grain sheave 9, but the grain sheave 9 may be omitted.

  Each of the chaff sheaves 7 and 8 includes a plurality of movable fins 7a and 8a and a plurality of fixed fins 7b and 8b arranged in parallel at a predetermined interval in the front-rear direction. The movable fins 7a and 8a can adjust the fin angle, and clearance adjustment (opening adjustment) between the fins is performed according to the fin angle adjustment. For example, the fin opening is automatically controlled in accordance with the amount of objects to be sorted on the oscillating flow plate 6 and the chaff sheaves 7 and 8. On the other hand, the fixed fins 7b and 8b are provided at the rear ends of the chaff sheaves 7 and 8, and the fin angle is fixed.

  Next, the flow of the sorting wind in the grain sorting device 1 will be described with reference to FIG. As shown in FIG. 2, the selected wind generated by the compressed air fan 12 is divided into a gap between the upper chaff sheave 7 and the lower chaff sheave 8, a gap between the lower chaff sheave 8 and the grain sheave 9, and the grain sheave 9 and the most spiral. 10 is blown into the gap. These sorting air passes through the gaps as they are, or blows up from the chaff sheaves 7 and 8 and the grain sheave 9 and reaches the dust chamber 17. Further, the second sorting air generated by the second sorting fan 16 blows up from the straw rack 13 and reaches the dust discharge chamber 17. At this time, in consideration of the balance between the layered sorting and the wind sorting, it is preferable that a certain amount of blowing air (the sorting wind passing between the fins) is generated in each of the chaff sheaves 7 and 8. When configured in stages, there is a possibility that the blow-up of the sorting wind will deteriorate.

  In the grain sorting device 1 according to the present invention, the air guide bodies 7 c and 8 c for guiding the sorting wind upward are provided at the rear of each chaff sheave 7 and 8, and the air guide body 7 c of the upper chaff sheave 7 is provided on the lower chaff sheave 8. It arrange | positions ahead rather than the wind guide 8c. With such a configuration, even if the chaff sheaves 7 and 8 are configured in two upper and lower stages, the blowing of the sorting air in each of the chaff sheaves 7 and 8 is promoted, and the air guide body 7 c of the upper chaff sheave 7 is replaced with the lower chaff sheave 8. By arranging in front of the air guide body 8c, it becomes possible to efficiently blow the selected wind over a wide range. As a result, in the grain sorting device 1 in which the chaff sheaves 7 and 8 are configured in two upper and lower stages, the balance between the layered sorting and the wind sorting can be maintained and good sorting performance can be exhibited.

  The air guide bodies 7c and 8c can be configured using a plate material equivalent to the movable fins 7a and 8a and the fixed fins 7b and 8b. For example, the plate-like air guide bodies 7c and 8c are arranged in parallel with the movable fins 7a and 8a and the fixed fins 7b and 8b, and the air guide bodies 7c and 8c are located below the movable fins 7a and 8a and the fixed fins 7b and 8b. By projecting, it becomes possible to guide the sorting air flowing below the chaff sheaves 7 and 8 between the fins.

  In the present embodiment, when the air guide bodies 7c and 8c are constituted by the plate material, the air guide bodies 7c and 8c are provided on the fixing fins 7b and 8b of the chaff sheaves 7 and 8, respectively. If comprised in this way, while performing fin opening adjustment by the movable fins 7a and 8a, a selection wind can be blown up in a fixed direction by the baffle bodies 7c and 8c, and the stable wind selection can be performed. In the present embodiment, the air guide bodies 7c and 8c and the fixing fins 7b and 8b are configured as separate bodies, but may be configured integrally with one member.

  Further, the air guide body 8 c of the lower chaff sheave 8 is preferably arranged along the terminal end portion of the first flow plate 11. In this way, the chaff sheave 8 is arranged up to the top of the most flow plate 11 to prevent the fall of the first spiral 10 and the like, while the strong sorting wind near the most flow plate 11 is guided to the air guide 8c. And can be blown up to the vicinity of the top plate 23 of the dust chamber 17. Thereby, the increase in the number 3 scattering due to insufficient height of the sorting wind can be prevented.

  Further, the air guide 7 c of the upper chaff sheave 7 is preferably arranged toward the front end of the top plate 23 in the dust exhaust chamber 17. In this way, the sorting air can be guided to the dust chamber 17 without being blown through the fourth port 19. Thereby, the efficiency of the dust exhaust fan 18 can be raised and the silence of the dust exhaust fan 18 can be improved.

  Further, in the present embodiment, a bent portion 15 a rising along the dust chamber 17 is formed at the end portion of the second flow plate 15, and between the bent portion 15 a and the rear end of the straw rack 13. A gap is secured. That is, the bent portion 15a acts to bounce forward while stalling the grains that run up on the second flow plate 15 in response to the second sorting wind. Thereby, the inconvenience that the grain which ran up on the second flow plate 15 in response to the second selection wind receives the selection wind of the compressed air fan 12 and is scattered third is avoided.

  The present embodiment configured as described is provided with a swinging sorter 21 provided with chaff sheaves 7 and 8 and a compressed air fan 12 for generating a sorting wind in front of the swinging sorter 21. The chaff sheaves 7, 8 are composed of a plurality of fins 7a, 7b, 8a, 8b, and the grain sorting device 1 leaks the grains from the gaps between the fins. In addition, since the air guide bodies 7c and 8c for guiding the sorting air upward are provided at the rear portions of the chaff sheaves 7 and 8, it is possible to promote the blowing of the sorting air in the chaff sheaves 7 and 8.

  In addition, by arranging the air guide 7c of the upper chaff sheave 7 in front of the air guide 8c of the lower chaff sheave 8, the selected air can be efficiently blown over a wide range. Thereby, even if the chaff sheaves 7 and 8 are configured in two upper and lower stages, the balance between the layered sorting and the wind sorting can be maintained and good sorting performance can be exhibited.

  The chaff sheaves 7 and 8 include movable fins 7a and 8a with variable fin angles, and fixed fins 7b and 8c with fixed fin angles. The air guide bodies 7c and 8c are fixed fins of the chaff sheaves 7 and 8, respectively. 7b and 8b, it is possible to perform stable wind sorting by blowing the sorting wind in a fixed direction by the air guides 7c and 8c having a fixed angle while adjusting the fin opening by the movable fins 7a and 8a. .

  Further, since the air guide body 8c of the lower chaff sheave 8 is arranged along the most flow plate 11, the chaff sheave 8 is arranged up to the top of the most flow plate 11 so as to prevent a fall such as a broken flaw from the first mouth. However, it is possible to guide the strong sorting air in the vicinity of the first flow plate 11 by the air guide body 8 c and blow it up to the vicinity of the top plate 23 of the dust chamber 17. Thereby, the increase in the number 3 scattering due to insufficient height of the sorting wind can be prevented.

  Moreover, since the air guide 7c of the upper chaff sheave 7 is disposed toward the tip of the top plate 23 in the dust exhaust chamber 17, the sorting air is guided to the dust exhaust chamber 17 without being blown through the fourth port 19. be able to. Thereby, the efficiency of the dust exhaust fan 18 can be raised and the silence of the dust exhaust fan 18 can be improved.

It is an internal side view of a grain sorter. It is an internal side view of the grain sorting device which illustrated the flow of sorting wind. It is a principal part side view of a grain sorter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grain sorting device 7 Upper stage chaff sheave 7a Movable fin 7b Fixed fin 7c Air guide body 8 Lower stage chaff sheave 8a Movable fin 8b Fixed fin 8c Air guide body 11 First flow plate 12 Pressure air fan 17 Dust chamber 18 Dust fan 19 4th port 21 Oscillating sorter 23 Top plate

Claims (4)

A rocking sorter provided with a chaff sheave and a compressed air fan for generating a sorting wind in front of the rocking sorter are provided, and the chaff sheave is constituted by a plurality of fins, and the grains are separated from the gaps between the fins. In the grain sorting device to leak,
The chaff sheave is configured in two upper and lower stages, and a wind guide for guiding the sorting air upward is provided at the rear of the upper and lower chaff sheaves. Further, the air guide of the upper chaff sheave is arranged in front of the lower chaff sheave. The grain sorter characterized by having performed.   2. The chaff sheave includes a movable fin having a variable fin angle and a fixed fin having a fixed fin angle, and the air guide body is provided on a fixed fin of the upper and lower chaff sheaves. Kernel sorting device.   The grain sorting device according to claim 1 or 2, wherein the air guide body of the lower chaff sheave is arranged along the most flow plate.   The grain sorting device according to any one of claims 1 to 3, wherein the air guide body of the upper chaff sheave is disposed toward a tip portion of the dust exhaust passage top plate.

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