JPH0122447Y2 - - Google Patents

Description

[Detailed explanation of the idea] (b) Industrial application fields The present invention relates to a threshing machine for threshing grain culms.

(b) Conventional technology Conventionally, a sorting air path that extends over the first receiving gutter and the second receiving gutter to the dust evacuation chamber is created by a blower fan installed at the lower part of the starting end of the handling room and a suction fan installed at the rear of the dust evacuation chamber. A threshing machine is already known in which a swinging sorter is installed in the sorting air passage, and a second thrower is provided at the transfer end of the second receiving gutter.

(c) Problems to be solved by the invention In the known threshing machine, the throwing blade of the second thrower located on one side of the lower part of the dust removal chamber rotates at high speed and suctions the top of the second catch gutter. The suction power of the fan is reduced, the straw waste discharge performance near the No. 2 thrower of the dust removal chamber is reduced, and the straw waste falls into the No. 2 receiving gutter, increasing the amount of the No. 2 reduced product and flowing into the dust removal chamber. There are problems such as clogging, and if the sorting air is strengthened to improve this, the sorting air on the side opposite to the second thrower becomes too strong, increasing the amount of scattering, and
A threshing machine equipped with a suction fan on one side has an intake width L to perform cyclone sorting at the part facing the suction port.
Because the chamber was narrow, when raw threshing was performed like in a combine harvester, straw debris adhered and accumulated on the rear plate that protruded diagonally into the dust removal chamber.

Furthermore, so-called open-type threshing equipment with a dust exhaust port opened in the rear wall of the dust exhaust chamber does not suffer from the negative effects of the suction from the second thrower as described above, but it does cause repulsion on the stroke rack above the second receiving gutter. There was a drawback that the grain was the third to be lost.

(d) Means for solving the problem The present invention is integrated with the above-mentioned oscillating sorting body and provides an intake port below the No. 2 return pan that faces above the No. 2 gutter, so that outside air can be drawn from the bottom of the No. 2 return pan. This prevents the reduction in the wind force of the sorting air caused by the suction of the second thrower without adversely affecting the air sorting in the dust removal chamber as much as possible. By pivoting the rear plate so that it can swing freely, and rotatably connecting the lower part of the rear plate and the upper part of the second return pan with a grain return plate, the dust evacuation chamber can be kept in a closed type even when raw threshing is performed. The above-mentioned problems were solved by preventing straw debris from adhering to or accumulating on the rear panel during construction.

(e) Action During threshing, grains are sieved and air-sorted while being transferred by the oscillating sorter in the sorting air passage, and the grains are carried out of the machine by the first transfer spiral in the first receiving trough, and are carried out to the second The material falls into the second receiving trough and is transferred to the second thrower by the second transfer spiral, and the second thrower returns the second material onto the oscillating sorting body.

When the straw waste and second grains are wind-sorted in the dust extraction chamber, the rear part of the dust extraction chamber is surrounded by a rear plate, a grain returning plate, and a second return pan, and the dust extraction chamber is constructed in a closed type. The outside air sucked in from the intake port at the bottom of the second return pan enters the second catch gutter along the bottom surface of the second return pan and is sucked into the second thrower, which weakens the sorting air in the vicinity. I have nothing to do.

In addition, even if the straw waste is wet as in the case of raw threshing, the rear plate is oscillated back and forth in conjunction with the rocking plate, so that straw waste does not adhere to and accumulate on the rear plate. There is no.

(F) Example An example of the present invention will be explained with reference to the drawings.
1 is a handling cylinder mounted on a shaft in a handling room 2, and a handling cylinder receiving net 3
A sorting air passage consisting of a main sorting air passage A and a sub-selection air passage B is formed by a blower fan 4 provided at the bottom and a suction fan 5 attached to the upper part of one side of the rear side, and the sorting air passage is provided with a back-and-forth oscillation. Oscillating sorting body 6 installed to move
, a flow plate 7 facing the lower part of the handling body receiving gutter 3, and a sorting screen 9 extending to the end thereof and facing the uppermost receiving gutter 8.
, a wave-shaped transfer plate 12 and a spoke (or stroke rack) 13 facing onto the second receiving gutter 11 from the upper end of the first flow plate 10, and a wave-shaped transfer plate facing onto the sorting net 9 from the lower part of the dust inlet 14. a plate 15, and a spoke (or stroke rack) oriented slightly below the portion facing the suction port 5a of the suction fan 5 from its terminal end;
It is composed of 16...etc.

Further, as shown in FIG. 1, the sorting net 9 includes a receiving net portion 9a curved along the lower outer periphery of the dispersing roll 17 driven by a second helical shaft 11a, and a receiving net portion 9.
The most flowing plate 10 from the part slightly lower than the rear upper end of a
It consists of an inclined crimp net 9b extending over a portion close to the upper part of the screen, and an adjustment net 9c that can be adjusted up and down, and an adjustment device fixed to the adjustment net 9c is drilled into both side plates of the swing sorting body 6. The processing teeth 18 of the dispersion roll 17 are locked in a vertically adjustable manner in a long hole, and the rotation locus of the processing teeth 18 of the dispersion roll 17 is set lower than the upper end of the flow plate 10, so that the grains repelled by the dispersion roll 17 are lower than the upper end of the flow plate 10. A second thrower 19 is provided at the transfer end of the second transfer spiral in the second receiving gutter 11 to prevent it from falling into the receiving gutter 11 .

Furthermore, a straw conveyor 21b is provided above the dust removal chamber 20 from the end of the feed chain 21a stretched along the handling opening of the handling chamber 2.

At the rear of the swing sorting body 6, a swash plate 22 is provided that extends diagonally rearward and upward from the second gutter 11.
and a second return pan 2 integrated with the oscillating sorting body 6.
3, and an intake port 24 surrounded by left and right side walls, and the rear part of the dust exhaust chamber 20 is provided with a rear plate 25 and the second return pan 23 whose upper part is pivotably mounted.
It is closed by a rear end upright part 23a and a grain return plate 27 interposed between the rear end upright part 23a and the rear plate 25 and rotatably connected by hinges 26.

In the above-mentioned threshing machine, the flow plate 7 is
The materials to be sorted that have leaked upward are transferred to a receiving net section 9a that constitutes a part of the sorting net 9 located in the main sorting air path A, and are subjected to a dispersion process by a dispersion roll 17. At this time, if the threshing conditions are good and the amount of material to be sorted is large by supplying a large amount of grain culms, or if wet grain culms are threshed, the rear part of the lifting adjustment net 9c is raised and set to perform the dispersion process. The grains that were wind-selected and leaked during the dispersion process flowed into the first receiving gutter 8 through the first flow plate 10, and the grains that were thrown out to the rear were collected by the crimp net 9b. The materials remaining on the crimp net 9b after being further sieved are fed into the corrugated transfer plate 12.

Further, the dust that has fallen into the corrugated transfer plate 15 from the dust inlet 14 is sieved by the spokes 16 . The leakage material joins onto the corrugated transfer plate 12, is sieved by the following spokes 13, and is screened by the sorting air of the sub-separation air path B, and falls into the second receiving gutter 11. is transferred to the second thrower 19 by the second transfer spiral and returned onto the flow plate 7.

During the above-mentioned dust sorting and second reduction, the throwing blade of the second thrower 19 rotates at high speed and suctions the top of the second receiving gutter 11.
Since outside air is sucked in from 4 as shown by arrow C, the sorting air is not weakened.

Further, in the dust removal chamber 20, the dust is separated by the sorting air from the blower fan 4 and the suction air from the suction fan 5. Since it is closed by the return plate 27 and the rear plate 25, the grains do not scatter like in the open type.

Furthermore, when the oscillating sorting body 6 oscillates, the second return pan 23 moves back and forth in conjunction with the oscillation.
The grain returning plate 27 and the rear plate 25, which are rotatably connected to the second retanning pan 23, swing back and forth, so that even if the material to be sorted is wet, straw debris does not adhere to or accumulate on the rear plate 25. In addition, the grain return plate 27 helps return the grains diagonally forward and downward.

(g) Effect of the invention Since the invention is configured as described above, the dust removal chamber 2
It is a type that can prevent scattering by blocking the rear part of the grain thrower 19 with a rear plate 25 and a grain return plate 27, etc. Despite being sucked in by the second thrower 19, outside air is introduced from the intake port 24 close to the top of the second gutter 11 in response to the intake of the second thrower 19, and the sorting air is drawn into the second thrower 19. It is not weakened by intake air, straw waste does not fall into the second receiving gutter 11 and the amount of straw waste does not become abnormally large, and good sorting can be performed while preventing clogging.

In addition, a rear plate 25 that blocks the rear part of the dust exhaust chamber 20 is provided.
The grain return plate 27 oscillates in conjunction with the oscillation of the oscillating sorter 6, thereby preventing straw debris from adhering to the rear plate 25 even if the waste is wet while returning the grains. There is no possibility of accumulation.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Figure 1 is a longitudinal side view of threshing, and Figure 2 is a rear view of the same. 3... Handling trunk receiving net, 4... Blowing fan, 5... Suction fan, 6... Rocking sorter, 8... First receiving gutter,
11...Second gutter, 17...Dispersion roll, 19...
...Second thrower, 20...Dust exhaust chamber, 22...Swash plate, 23...Second return pan, 24...Intake port,
25... Rear plate, 27... Grain return plate.

Claims (1)

[Scope of utility model registration request] A ventilation fan 4 and a dust removal chamber 2 installed at the bottom of the handling chamber 2
With the suction fan 5 provided at the rear of the 0, a sorting air path is formed that extends from the bottom of the handling trunk receiving net 3 through the first receiving gutter 8 and the second receiving gutter 11 to the suction fan 5. A swinging sorting body 6 is provided at the second receiving gutter 11, and a second thrower 19 is provided at the transfer end of the second receiving gutter 11.
In a threshing machine in which the rear part of the dust evacuation chamber 20 is sealed, an intake port 24 is provided below the second return pan 23 facing above the second receiving gutter 11 and integral with the swing sorting body 6; The upper part of the second return pan 23 and the lower part of the rear plate 25 of the dust removal chamber 20 are rotatably connected by a grain return plate 27, and the upper part of the rear plate 25 is pivotably supported. A threshing machine.