JPH0380448B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oscillating sorting device for a threshing machine having a gravity sorting section and an over-sorting section through which the grains subjected to the gravity sorting are allowed to pass through.

The oscillating sorting device in this type of threshing machine is useful, for example, when there is a large volume of material to be sorted, which can easily cause feeding problems such as stagnation, or when the amount of cut straw generated is small, such as when threshing rice. When it is difficult for cut straw to get mixed into the overgrain, the mesh size of the oversorting section is made coarser in order to increase work efficiency, and on the other hand, when the volume of the material to be sorted is small and there is no need to worry about feeding problems, When a large amount of cut straw is generated, such as in wheat threshing, and the cut straw is likely to be mixed into the overgrain, it is desirable to make the mesh of the over-selection section dense in order to improve the grain recovery efficiency.

By the way, conventionally, as a device that can change the density and density of the mesh in the over-selecting section, there has been a method using two shakers each having mesh holes penetrating vertically, such as the one disclosed in Japanese Utility Model Application Publication No. 54-44773. The movable sorting plates are stacked one on top of the other, and one of the oscillating sorting plates is fixed in position, while the other oscillating sorting plate is provided so that its position can be changed and fixed, thereby adjusting the vertical alignment of the stacked oscillating sorting plates. A structure in which the penetration area is changed is known.

However, since the conventional structure described above is a structure that changes the penetration area of the upper and lower stitches, the area occupied by the oscillating sorting plate other than the vertically penetrating alignment holes is large. The ratio of leaked materials to be sorted is low, and the materials to be sorted tend to accumulate on the oscillating sorting plate, and the sorting ability remains low, and the sorting ability further decreases due to the accumulated materials. There were some drawbacks, such as:

The present invention has been made in view of the above-mentioned circumstances, and although it is possible to change the spacing of the over-selecting device according to the sorting conditions, it is difficult for objects to be sorted to accumulate on the oscillating sorting plate. The purpose of the present invention is to provide a swinging sorting device for a threshing machine that can sort efficiently.

In order to achieve the above object, the oscillating sorting device for a threshing machine according to the present invention has the above-mentioned structure, and has two positions: one in which it protrudes toward the over-selection section, and the other in which it is retracted below the specific gravity sorting section. Two types of sieves, which can be freely switched to each other and are each equipped with nets with different oversize meshes, are provided so as to move in and out of the overselection section side alternatively and contradictoryly. A certain thing is a characteristic configuration.

The effects of this characteristic configuration are as follows.

In other words, since each of the two types of sheaves that make up the oscillating sorting device is fitted with a net with an oversized mesh, the area of the mesh holes occupies most of the area of the entire sheave, and this makes it possible to efficiently prevent leakage. This allows for lower sorting, and it is possible to avoid as much as possible the accumulation of material to be sorted on the oscillating sorting plate as in the conventional method, and each sheave selectively and contradictorily moves in and out of the over-sorting section. It is said that it is possible to easily and quickly change the volume of the material to be sorted and the grain size to be threshed, such as rice or wheat, and in particular, it can adequately respond to changes in volume during the work. It has come to be effective.

Hereinafter, embodiments of the configuration of the present invention will be described based on the drawings.

As shown in Fig. 1, this is a threshing machine A mounted on a combine harvester, in which the materials to be sorted from the handling chamber 2 are placed in a sorting chamber 3 on the lower side of the handling chamber 2 in which a handling barrel 1 is installed. A swing sorting device 4 is provided, and a winnower 5 and a dust exhaust fan 6 are provided for blowing a sorting airflow into the sorting chamber 3. It is constructed by providing a second collecting section 8 for collecting the second grain and a thrower 9 for returning the second collected grain to the handling chamber 2.

The oscillating sorting device 4 has a sheave case 12 supported via a oscillating arm 10 and an eccentric cam 11 so as to be freely movable, and a receiving net 2A stretched below the handling chamber 2. a specific gravity sorting section 13 for sorting grains by specific gravity, and an over-sorting section capable of passing the grains sorted by specific gravity therein to the first collecting section 7 and dropping and supplying non-filtered grains to the second collecting section 8. 14, and two upper and lower stroke racks 15, 15' for handling objects to be processed from the opening 2B at the rear end of the handling chamber 2. The over-selection section 14
is disposed in an inclined position such that it is located higher toward the rear end of the feed with respect to the extended imaginary plane a of the specific gravity sorting section 13.

Moreover, the swinging sorting device 4 includes the swinging arm 10.
By changing the position of the fulcrum shaft 10a along the elongated hole 16 in the front-rear direction, the swing trajectory, that is, the feed swing direction is changed, and the feed capacity is changed. Specifically, the farther back the fulcrum shaft 10a of the swing arm 10 is located, the more the swing arm 1
0 is located at the center of its swing amplitude, the angle of the tangent line passing through the tip of the swing arm 10 with respect to the horizontal becomes small, and the fulcrum axis 1 of the swing arm 10
The configuration is such that the tangent line when Oa is located at the rear end and the over-selection section 14 are positioned substantially parallel to each other. In other words, the larger the tangential angle, the larger the feeding capacity.

Thus, the swinging sorting device 4 has a posture protruding toward the over-selecting section 14 and the specific gravity sorting section 1.
3. A member 17 that can change the mesh size of the over-selecting section 14 by switching between a lower and retired position.
will be established.

The over-separation changing members 17 have different mesh sizes and can be slid separately into a protruding position and a retracted position, and are contrarily slid to the protruding position, and by sliding to the protruding position, the over-selecting part 14 is changed. Two upper and lower sheaves to be formed 1
8, 18'.

The mechanism for sliding both the sheaves 18, 18' in a contralateral manner is such that the sheave 1
Pins 19, 1 to frames 18A, 18A' of 8, 18'
9' and the long holes 20, 20', and by swinging around the base end, the sheave 18,
In addition to providing links 21 and 21' for sliding the part 18', the operation lever 23 attached to the A part of the threshing machine near the driving part 22 and one link 21 are provided.
A pair of gears 25, 25' are provided, which are interlocked and connected via real wires 24, 24, and which interlock the links 21, 21' so as to swing oppositely.
It is configured.

26 is a reaping section, and 27 is a crawler traveling device.

According to the configuration of the embodiment described above, by operating the operation lever 23 in the operating section 22 to switch between two positions, both the sheaves 18 and 18' are placed in a contradictory protruding position, and the mesh size in the over-sorting section 14 is changed between coarse and fine. It can be changed according to the street.

FIG. 6 shows another embodiment, in which brushes 18B, 18B' are attached to the sheave frames 18A, 18A', respectively, for cleaning the other sheave 18, 18' as it slides. It is something.

In the above embodiment, two sheaves 18, 1
Although the sheave 8' is configured to be placed in a contradictory protruding position to change the mesh, the mesh changing member 17 is composed of three or more sheaves with mutually different meshes and alternatively protruded. Alternatively, the mesh may be formed in a protruding position and overlapped with a fixed sieve constituting the over-selection section 14 to change the mesh size closely.

[Brief explanation of drawings]

The drawings show an embodiment of the swing sorting device in a threshing machine according to the present invention, in which Fig. 1 is a partially cutaway side view of a combine harvester, Fig. 2 is an enlarged longitudinal sectional side view of the main part, and Fig. 3 is a main part. Fig. 4 is an enlarged longitudinal sectional front view of the main part, Fig. 5 is an enlarged longitudinal sectional side view of the main part,
FIG. 6 is a longitudinal sectional side view of the main parts showing another embodiment. 13... Specific gravity sorting section, 14... Over sorting section, 1
7... Over mesh changing member, 18, 18'... Sheave.

Claims (1)

[Claims] 1. In a swinging sorting device for a threshing machine having a specific gravity sorting section 13 and an over-sorting section 14 that allows the grains subjected to the specific gravity sorting to pass therethrough, the specific gravity sorting section 13
Two types of sheaves 18, 18, which can be freely switched to a lower retracted position and are each provided with nets of different mesh sizes, are alternatively and contradictoryly installed in the over-selecting section 14. A swing sorting device in a threshing machine, characterized in that it is configured to move in and out from the side.