JPH05344820A - Sorting structure of thresher - Google Patents

Abstract

PURPOSE:To prevent cut straws from dropping at a straw rack part and to improve sorting performance by protrusively installing a sieve made of a resin below the undersurface of a front straw rack. CONSTITUTION:A front straw rack 7 equipped with plural rack plates 7a at the right and left is laid side by side at the rear of a front grain pan 6 and a sieve 15 made of a resin for rough selection is protrusively installed along the undersurface of the front straw rack. Cut straws falling from the front straw rack are received by the sieve and can be transported backward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a threshing device of a type using a straw rack for rough screening, and to a screening structure for further improving the screening performance.

[0002]

2. Description of the Related Art Generally, in a thresher, one using a Straw rack (see Japanese Utility Model Laid-Open No. 4-21231) and one using a chaff sieve in a coarse sorting unit (Real Kai 3-675).
(See Japanese Patent Publication No. 29). The former one allows relatively fine sorting and is suitable for mounting on an automatic threshing type combine, and the latter one has a rough sorting function for a large amount of processed materials and is mounted on a large combine such as an all-cullet type. And so on.

[0003]

In a relatively small combine harvester, the Straw rack type threshing device is often adopted, but in this type of rough sorting operation, the falling space is along the conveying direction of the object to be treated. Since it has a long and long shape, the straw tends to fall off, and there is room for improvement. An object of the present invention is to further improve the sorting performance in a threshing device using a straw packing in the rough sorting section by making it possible to prevent the falling of straw at the straw packing portion as much as possible.

[0004]

In order to achieve the above object, the present invention has a plurality of rack plates arranged side by side on the rear part of a front grain pan for sorting the processed products leaking from a net by specific gravity difference. It is characterized in that the straw racks that are provided are connected in series, and a resin sheave for rough selection is stretched along the lower surface of the straw rack.

[0005]

[Operation] The sheave stretched below the Straw rack can prevent the falling of the straw that could not be blocked by the Straw rack and can convey it backward, and the sheave is for coarse selection, that is, it has a large mesh. The grain can be dropped well at the Straw rack site as before. Since the sheave is made of a resin that easily repels water, it becomes difficult for a wet treated material to adhere to or accumulate on the sheave, and a good rough sorting action can be exhibited even during wet threshing. In addition, since the sheave is provided along the lower surface of the straw rack, the object to be processed is caught between the sheave and the straw rack, as in the case where the sheave is provided at a position below the straw rack with a slight distance. There is no inconvenience.

[0006]

Therefore, by relatively simple modification in which a resin sheave is stretched on the lower surface of the front Straw rack, it is possible to effectively prevent the falling of straw at this Straw rack and to prevent the roughing during wet threshing. It became possible to eliminate the deterioration of the sorting action as much as possible, and it was possible to further improve the sorting performance of the threshing device of the type in which rough sorting is performed with a Straw rack.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a threshing device mounted on the combine, where A is a threshing unit, B is a sorting unit, and C is a collecting unit. The threshing section A is composed of a handling barrel 1, a handling chamber 2, a receiving net 3, a feed chain 4, etc., and threshes the grain culm introduced between the handling barrel 1 and the receiving net 3 by the striking action of the handling teeth 1a. To do. As shown in FIG. 3, projections 3A are formed on the crosspiece 3a on the resin net 3 so that unprocessed objects such as spikes can be removed from the projection 3A.
It is designed to be hooked on A to improve the shedding ability. The sorting unit B includes a rough sorting unit B _{1 including} a front Glen pan 6, a front Straw rack 7, an intermediate Straw rack 8, and a rear Straw rack 9, a lower Glen pan 10, and a Glen sieve 11.
And a fine sorting section B ₂ composed of the above and the above. Numeral 12 is a Kara-no-mitsu that produces a selection wind. The collecting section C includes a first collecting section 13 in which the first horizontal feed conveyor 13a is arranged and a second collecting section 14 in which a second horizontal feed conveyor 14a is arranged.

As shown in FIG. 1, in the rear part of the front part Glen pan 6 for selecting the specific gravity difference of the processed products leaking from the receiving net 3,
A front stroll rack 7 formed by arranging a plurality of rack plates 7a side by side is continuously provided, and a resin upper sheave 15 for rough selection is stretched along the lower surface of the front stroll rack 7. . The upper sheave 15 is formed with a large number of square holes 15a each having a side of 9 to 15 mm, and is bent and formed so as to form a serrated conveying surface similar to the upper edge shape of the front stroll rack 7. In other words, the straw is the front Straw Rack 7
Even if it falls from the upper sheave 15, it can be received by the upper sheave 15 and conveyed backward.
It leaks well.

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]

FIG. 1 is a plan view showing the structure of a rough sorting unit.

FIG. 2 is a side view of the threshing device.

FIG. 3 is a front view showing the structure of a receiving net.

[Explanation of symbols]

 3 Receiving net 6 Front grain pan 7 Straw rack 7a Rack plate 15 Resin sheave

Claims (1)

[Claims] 1. A stroll rack formed by arranging a plurality of rack plates (7a) side by side at the rear of a front grain pan (6) for selecting a specific gravity difference of a processed product leaking from a receiving net (3). A threshing device sorting structure in which (7) is continuously provided and a resin sheave (15) for rough sorting is stretched along the lower surface of the straw rack (7).