JPH02113823A - Structure of grading part in thresher - Google Patents

Abstract

PURPOSE:To reduce mixing of straw wastes into recovered grains even if the amount to be treated is changed by setting the first half part of a chaff sieve at a smaller full opening degree than that in the second half part. CONSTITUTION:The first half part (9A) of a chaff sieve is set at a smaller full opening degree than that in the second half part (9B). If the amount of materials to be treated is small, the materials are leaked down only from the second half part (9B) of a chaff sieve without leaking down from the first half part (9A) thereof and returned from the second yield recovering part 14 to a threshing chamber 4. Thereby, grading performance will not be deteriorated by mixing straw wastes in the first yield recovering part 13 or dropping the straw wastes onto a grain sieve 10.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of the sorting section of a threshing device installed in a combine harvester, etc., and more specifically, the structure of the sorting section of a threshing device installed in a combine harvester, etc. Chaff sieves are arranged over the entire range in the direction of conveyance of the processed material, and the opening degree can be adjusted freely. A grain sieve for sorting grains is provided below the chaff sieve, and a first grain collection section and a second grain sieve for collecting grains are installed below the chaff sieve. This invention relates to a sorting section of a Kl removal device, which is equipped with a second product recovery section and a fit structure.

[Conventional technology]

As for the conventional sorting section structure, for example, Japanese Patent Application Laid-open No. 6
As disclosed in Japanese Patent Application No. 1-192225, the chaff sieve is configured to adjust the opening degree over the entire area according to the weight of the material to be processed, and even at the operating limit of the opening degree toward the closed side, the material to be processed is Some were configured to leave an opening to allow leakage.

[Problem to be solved by the invention]

The structure of the above-mentioned example is designed to automatically adjust the degree of opening by swinging open 7 due to the weight of the material to be treated, depending on the amount of material leaking from the rear chamber.

However, when the amount of material to be processed is small, such as when turning on a headland and when there is no trailing stage, the chaff sheave is positioned at the most closed position due to its light weight. Since the grains and fine straw waste remain, the grains and fine straw waste leak out together, resulting in a large amount of straw waste being mixed in on the first material collection section, which deteriorates the sorting performance, which is a drawback that should be improved. It had

An object of the present invention is to solve the above-mentioned disadvantages by paying attention to the fact that the small amount of processed material is temporary.

[Means for Solving the Problems] A feature of the present invention is that in the sorting section structure of the threshing device having the above configuration, the chaff/-bu is removed from the top pick at the operating limit to the closed side of the opening degree. The first half of the upper part in the transfer direction of the processed material is in a state in which the processed material cannot leak, and the rear half located above the second material collection part is in the state in which the processed material can leak. The full opening/closing degree of the front half of the chaff sheave is set smaller than the full opening degree of the rear + part, and its functions and effects are as follows.

[For production]

In other words, when there is no subsequent grain culm and the amount of threshed material is small, if the chaff sieve is opened to the closed operating limit, the processed material that leaks from the handling chamber will not leak into the first half of the chaff sieve. It is only transferred to the rear side, and it is transferred to the rear half and begins to leak. As a result, no straw waste is mixed into the -S heavy containment section, and all of the processed material is returned to the handling chamber via the second material collection section.

Then, when normal continuous grain culm feeding is performed later, the opening of the chaff sieve is operated to the open side, and the processed material leaks from the front half, and grain sorting is performed by the grain sieve.

Moreover, when there is a large amount of material to be processed, the leakage from the handling room will concentrate on the starting end of the chaff sieve, but since the opening degree of the front half is small, less straw waste will get mixed into the top of the chaff sieve. .

〔Effect of the invention〕

Therefore, according to the present invention, by rationally improving the structure of the chaff sieve, even when the amount of threshing is changed, it is possible to suppress the contamination of straw waste into the recovered grains, thereby improving the sorting performance. This is something that can be improved upon.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 2 shows a threshing device (1) for a combine harvester according to the present invention. This threshing device f (1) connects the feed chain (2) and the clamping rail (3) to the stock side of the imported husk.
The structure is such that the tip side is handled and processed by a handling cylinder (5) which is driven and rotated in a handling chamber (4) while being held and conveyed by the handling chamber (4). 6) is configured to separate grains and waste straw waste.

In other words, the material to be processed is transported to the receiving net (7) stretched below the handling room (4).
) and fall onto the swinging sorting device (8) below. The oscillating sorting device (8) includes a chaff sieve (9) for rough sorting of the processed material, and a grain sieve (IOC chaff sieve (9)) installed below the chaff sieve (9) for grain sorting. ' Stroke ranks (1) and the like connected to the winter end for transferring and discharging waste straw are attached to the swinging sorting case (12), and grooves are formed so that these can be driven to swing in one direction for sorting. In addition, below the swing sorting device (8), there is a first product collection section (13) for collecting grains and a second product collection section (13) for returning second products such as grained paddy to the handling room (4). In addition to disposing a grain collecting section (14), a winnow (15) for blowing away fine straw waste is also provided.

The chaff sheave (9), as shown in FIG. X＞
The wing (19) is pivotably connected to the swinging sorting case (12) so as to be able to swing freely around the circumference, and the lower part is connected to the lower pivot piece (17) to close and bias the drive lIJ member (18). ) by pulling it with an operating wire (20) and swinging it open, the opening degree can be freely adjusted over the entire area in the processing object conveyance direction. To adjust the opening of the chaff sheave (9),
It is done as follows. That is, the sensor (21) detects the amount of vertical displacement of the clamping rail (3) according to the amount of grain culm, and based on the detection result, the control device (22) and the drive device (23) control the operation wire. (20) is pulled to adjust the opening degree.

In the chaff sieve (9), at the imitation limit to the closed side of the opening degree, the upper half part (9A) on the upper side in the processing material transfer direction located above the first material collection section (I3) is prevented from leaking the processing material. state, and the full opening degree of the front half (9A) is changed to the full opening degree of the rear half (9B) so that the rear half (9B) located above the second material collecting section (14) can leak the processed material. It is set smaller than the full opening degree. To explain in detail, the first half (9
The partitioning upright part (24A) at the lower edge of each chaflip (9a) in A) is formed to be tall, and the partitioning upright part (24[1) in the rear half (9B) is formed to be dorsiflexed. , the rising part (
248) is configured so that it comes into contact with the adjacent lip t& (9a) and becomes fully open.

With this configuration, when there is a small amount of threshed material, the processed material will not leak from the first half (9A) of the chaff sieve (9), but will leak only from the second half (9B) of the chaff sieve (9). Since straw waste is returned to the handling room (4) from the first straw collection section (14), straw waste will not get mixed into the first straw collection section (13). or,
When there is a large amount of material to be processed, even if it falls concentrated on the starting end of the chaff sieve (9), the opening degree of the front half (9A) is small, so the straw waste falls onto the grain sieve (10), reducing the sorting performance. There is little fear.

[Example of separate box]

■ The change in the set inclination angle when the chaflip plate (9a) in the front half (9A) of the chaff sheave (9) is fully opened is greater than the set inclination angle when the chaflip plate (9a) in the rear half (9A) is fully open. It may be configured to be small.

■ Also, when installing the chaflip plate (9a) on the front half (9A) of the chaff sheave (9), pinch the
) may be configured to be smaller than the pitch.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the sorting B structure of the threshing device according to the present invention, with FIG. 1 being a longitudinal sectional side view of the main part, and FIG. 2 being a simplified side view of the husking device. (4)... Handling room, (9)... Chaff sieve, (9A)... First half, (9B)...
...Second half, (10)...Glenshive, (I
3)・・・・・・First snout collection part, (14)・・・・・・
Second item collection department.

Claims (1)

[Claims] Below the handling room (4), a chaff sieve (9) for rough sorting of leaked waste is installed over the entire area in the transport direction of the processed material, and its opening can be freely adjusted. A threshing device is equipped with a grain sieve (10) for carrying out grain sheave, and a first grain collection section (13) for collecting grains and a second grain collection section (14) for collecting second grains are arranged below the grain sheave (10). The sorting section structure is such that when the chaff sieve (9) is at its operating limit to the closed side of the opening, the first article collecting section (13)
The upper half (9A) of the upper side in the direction of transfer of the processed material located above the
The front half (9B) of the chaff sieve (9) is in a state where the processed material cannot leak, and the rear half (9B) located above the second material collection section (14) is in the state where the processed material can leak.
Structure of the sorting section of the threshing device in which the full opening degree of A) is set smaller than the full opening degree of the rear half (9B).