JPH07115836A - Receiving net structure in axial flow type thresher - Google Patents

Abstract

PURPOSE:To make the improvement of grain recovery efficiency compatible with that of grain sorting efficiency in an axial flow type thresher equipped with a receiving net to feed threshed grains by dropping from a threshing chamber to a sorting section. CONSTITUTION:The mesh of the midway portion of a receiving net 4 along the threshed grain-conveying direction in a threshing chamber is made larger than that of the front portion along this direction, and the mesh of the rear portion along the direction is made smaller than that of the midway portion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a net-receiving structure for an axial-flow threshing device mounted on an all-cullet throw-in type combine.

[0002]

2. Description of the Related Art Conventionally, the mesh size of the entire receiving network has been made substantially the same.

[0003]

However, if the mesh size of the receiving net is reduced, the efficiency of falling of the grains mixed in the straw waste to the sorting unit is deteriorated, and the grain collection efficiency is likely to decrease, and conversely,
If the mesh size of the net is increased, a large amount of straw waste will fall into the sorting section, and the sorting efficiency will easily decrease.In short, it is difficult to achieve both improved grain collection efficiency and improved sorting efficiency.
There was room for improvement in terms of grain recovery and sorting efficiency. An object of the present invention is to easily achieve both improvement of grain collection efficiency and improvement of selection efficiency.

[0004]

A characteristic feature of the present invention is that in an axial flow type threshing device provided with a net for dropping threshing material from the handling room to the sorting section, processing in the handling room of the receiving net is performed. The mesh of the intermediate part in the material transfer direction is larger than that of the front part in the handling chamber in the handling chamber, and the mesh size of the rear part of the receiving net in the handling chamber in the handling chamber is It is formed to be smaller than the intermediate portion in the processing product transfer direction.

[0005]

In other words, most of the grains pass through the net at the front side of the net in the processed product transfer direction, so that in the middle part of the net in the processed product transfer direction, the grains were mixed in a large amount of straw waste. It is difficult to pass through the net because it is in a state, but the grain mixed in the straw waste is compared by making the mesh of the intermediate part of the net in the processed product transfer direction larger than the front part in the processed product transfer direction. It is possible to sufficiently drop together with the fine straw waste from the intermediate part of the receiving net in the processed product transfer direction to the sorting part, and improve the grain collection efficiency. Most of the grains in the rear part of the receiving net in the processed product transfer direction are straw and there are not many grains, but the mesh of the rear part of the processed net in the processed product transfer direction is smaller than that of the intermediate part in the processed product transfer direction. Therefore, excessive straw waste can be prevented from dropping from the rear side of the processed net transfer direction of the receiving net to the sorting unit, and the sorting efficiency can be improved.

[0006]

As a result, it is possible to provide a more efficient axial flow threshing device which can easily achieve both improvement of grain collection efficiency and improvement of selection efficiency by appropriately selecting the mesh size of the receiving net. Became.

[0007]

EXAMPLE As shown in FIG. 1, in order to construct an axial flow type threshing device to be mounted on an all culm input type combine, a handling room 2 communicating with a feed conveyor 1 for supplying culm from a cutting section on the left side of the figure. Is formed in the upper part of the case, and the sorting section 3 is provided below the handling chamber 2.
And a receiving net 4 for leaking grains from the handling room 2 to the sorting section 3 is provided over almost the entire length of the handling room 2.

A handling cylinder 5 is rotatably supported in the handling chamber 2 so as to be rotatable about a front-rear horizontal axis, and spiral handling teeth 6a are provided on the outer peripheral surface of the handling cylinder 5.
Is installed over the entire length, and the spiral handle 6
An independent handling tooth 6b is attached at an appropriate pitch in the circumferential direction, and a dust-sending valve 7 is provided for guiding a processed object flowing in the circumferential direction of the handling cylinder along with the rotation of the handling cylinder 5 in the axial direction of the handling cylinder. It is provided on the ceiling.

The sorting section 3 is provided with a rocking sorting case 8, a wind picking sardine 9, a No. 1 object recovery screw conveyor 10, and a No. 2 object recovery screw conveyor 11, which are supplied under leakage from the receiving net 4. An object is subjected to sieving and wind screening while being oscillatedly transferred to the rear by an oscillating sorting case 8, and the singulated grain is configured to be sent from a No. 1 object recovery screw conveyor 10 to a Glen tank (not shown), Inadequate selection 2
It is configured such that the product is returned from the second product recovery screw conveyor 11 to the front part of the swing selection case 3a by a reduction device (not shown).

As shown in FIGS. 2 and 3, in constructing the receiving net 4, curved plate-shaped crosspieces 4a extending in the circumferential direction of the handling cylinder are arranged side by side in the axial direction of the handling cylinder. The thin round bar 4b that extends
Six receiving net units 4A to 4F are arranged side by side, and the receiving net 4 is divided into two in the circumferential direction of the handling cylinder and divided into three in the axial direction of the handling cylinder.

The interval P ₁ between the crosspieces 4a in the front portion of the receiving net 4 in the treatment room transfer direction in the handling chamber 2, that is, the entire receiving net units 4A and 4B and the front side of the receiving net units 4C and 4D,
An intermediate portion of the receiving net 4 in the processing object transfer direction in the handling chamber 2, that is, a rear portion of the receiving net units 4C and 4D and the receiving net unit 4
The distance P ₂ between the crosspieces 4a in the front portion of E and 4F, and the rear portion of the receiving net 4 in the handling chamber 2 transfer direction in the handling chamber 2,
That is, the crosspiece 4a in the rear portion of the receiving net units 4E and 4F
The interval P ₃ of the crosspiece 4a in the front part of the processed material transfer direction.
The crosspiece 4 in the intermediate portion in the processing product transfer direction than the interval P _{1 of}
The interval P _{2 of a} is set to be large, and the interval P ₃ of the crosspiece 4a in the rear portion in the processed product transfer direction is set to be equal to or smaller than the interval P ₁ of the crosspiece 4a in the front part in the processed product transfer direction. is there.

That is, the mesh of the intermediate portion of the receiving net 4 in the workpiece transfer direction is made larger than that of the front portion in the workpiece transfer direction, and the mesh of the rear portion of the net 4 in the workpiece transfer direction is treated. It is formed to be smaller than the intermediate portion in the material transfer direction, and most of the grains are passed through the front portion of the receiving net 4 in the processed material transfer direction.
In the middle part of the processed product transfer direction, the grains mixed in the straw waste are dropped into the sorting unit 3 to improve the grain collection efficiency, and the receiving net 4
In the rear part of the processing product transfer direction, the sorting efficiency is improved without dropping excessive straw waste on the sorting part 3.

Incidentally, the grain pan 12 which receives the processed product falling from the intermediate portion of the receiving net 4 in the processed product transfer direction and sends the processed product to the rear, and the straw rack which separates and drops the grains while loosening and sending the processed product from the Glen pan 12. 13 is added to the rocking sorting case 8 so that the grains in the processed product that fall from the intermediate portion of the receiving net 4 in the processed product transfer direction, so-called sticky grains, can be collected by the screw conveyor 10 for second product reduction. I am doing it.

The structure of the receiving net 4 can be set arbitrarily, and for example, a crimp net formed by knitting a wire rod or a punched steel plate can be used.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

1 is a vertical side view of the threshing device.

[Fig. 2] Front view in vertical section of the threshing section

[Figure 3] Development view of the receiving network

[Explanation of symbols]

 2 Handling room 3 Sorting unit 4 Receiving network

Claims (1)

[Claims] 1. A mesh of an intermediate portion of the handling net (4) in the handling chamber (2) of a receiving net (4) for feeding the threshing treatment product from the handling chamber (2) down to the sorting section (3). A larger mesh than the front portion of the handling chamber (2) in the processing product transfer direction, and the rear portion of the receiving net (4) in the handling chamber (2) in the processing product transfer direction. A net structure of an axial flow type threshing device which is formed to be smaller than an intermediate portion of the net (4) in the processed product transfer direction.