JPS6211394Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a swing sorting structure for a threshing device mounted on a combine harvester.

A combine harvester is a device that performs raw threshing while harvesting grain culms that are standing in paddy fields. In many cases, culm fragments that are cut to the bottom and grains mixed with straw that are mixed in or attached to the straw do not fall into the first mouth but are sent to the sieve line at the end of the oscillating sorting device. . If these fine grains do not fall into the first opening and do not fall through the sieve line, they may be dropped directly into the field through the third opening, or they may be sucked into a dust fan and blown onto the field. This appears as a problem in the combine harvester's performance, where there is a lot of loss.

The present invention collects such grains mixed with culms and straw at the sieve line that curves upward at the end of the sieve line and separates them from the dust sucked into the dust suction fan. The structure is such that the mixed grains fall into the second port.

The purpose of the present invention is as described above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings.

FIG. 1 is an overall side view of the combine harvester.

The aircraft body is placed on a crawler type traveling device 14. A weeding body 1 is protruded from the tip, and the base of the grain culm is separated from side to side while being guided to a pulling device 2. While being pulled up by a pulling device 2, the plant is harvested by a reaping device 4, and the plant head portion is transferred to a plant transfer device 3, and the tip portion is transferred to a tip transfer device 5. The stock transport device 3 is transferred to the vertical transport device 6,
The grain is suddenly jumped up by the vertical conveyance device 6 and transferred to the feed chain 7 of the threshing device. The ear tip portion is conveyed from the ear tip conveying device 5 to the iron plate at the entrance of the handling drum of the threshing device.
The grain culm enters the threshing device with the stock end held by the feed chain 7, and the ear end touches the handling teeth 19 of the handling barrel 17 and is threshed. The fine grains mixed with straw after threshing pass through the crimp net 18 and are transferred to the swing sorting device A.
The fine grains fall onto the grain sorting board 20 and are sorted by specific gravity, passing through the chaff sieve 22 and falling from the sorting net 21 to the first screw conveyor 10. While the culm-cut grains and grains mixed with straw are sent to the chaff sieve 22, only the heavier grains fall and fall onto the second screw conveyor 23. Straw waste and dust that do not fall even at the second port reach the sieve line 12 from the sieve sieve 22, are sucked from the sieve line 12 to a cross-flow fan type dust removal fan 15, and are blown onto the paddy field from the third port 25. The second screw conveyor 23 communicates with the return thrower 11, and the straw mixed flow that has fallen into the second port is returned to the handling barrel 17. 13 is a waste straw conveyor, and 16 is a waste culm processing device.

Sorting air is blown from the sorting fan 9 to the first and second ports, and light straw and culm grains are sent from the first port to the second port, and dust is sent from the first port and second port to the dust removal fan 15. sent to.

FIG. 2 is a side sectional view of the sorting device of the threshing device with the handling barrel removed, FIG. 3 is a plan view of the sieve line, and FIG. 4 is a side view.

The sieve wire 12 is fixed to the rear end of the swinging sorting device by a fixed frame 12c, and a long hole 12 is formed in the fixed part.
d and a butterfly bolt 12e, and below the dust suction port C,
The dust suction port can be adjusted forward and backward over range B.
As shown in FIG. 2, straw waste and dust are sucked up from the dust suction port C and discharged from the third outlet 25 of the dust removal fan's discharge port. Therefore, by adjusting the curved sieve line 12a of the sieve line within the dust suction port range B of the dust suction port C, the position of the curved sieve line 12a can be changed according to the dry/wet condition of the grain culm, and the No. 3 loss can be reduced. It can be adjusted. Long hole 12d
The wing bolt 12e can be adjusted by removing the window on the side panel of the fuselage.

The forward and backward adjustment of the sieve line does not necessarily involve adjusting all of the sieve line; the fixed sieve line 12b is formed in a straight line and is in a fixed state, and only the curved sieve line 12a is adjustable back and forth.

As described above, the present invention has a structure in which a cross-flow fan type dust removal fan 15 is provided above the rear end of the swing sorting device A in the threshing device, and the dust removal fan 15 is located below the dust removal fan 15 from the rear end of the swing sorting device A. The sieve line 12 that protrudes up to Since the position can be adjusted, the following effects can be achieved.

First, a part of the sieve line 12 protruding from the rear end of the swing sorting device A is curved upward within the dust suction port range B of the dust suction port C, so that several lines are formed instead of a straight line in the past. By curving the sieve line 12a, broken culms, grains mixed with straw, and chaff are removed from the curved sieve line 12a.
It engages with the curved part at the rear end and undergoes sorting before being sucked into the dust removal fan 15, reducing the probability that fine particles will be discharged from the third port.

As with the technology described in the conventional Utility Model Publication 53-48863, simply bending the stalk diagonally in a straight line is not enough to retain the broken stalks and grains mixed with straw that are sucked into the dust removal fan 15, and it is not possible to improve the sorting performance as with the present invention.

Secondly, fine dust etc. are removed from the curved sieve line 12a.
Since the dust is directly sucked into the dust removal fan 15 and discharged without being affected by the dust removal, there is no reduction in dust absorption performance.

Thirdly, the fixed sieve line 12b is fixed in a non-adjustable state, and the curved sieve line 12a is adjustable back and forth within the range B of the dust suction port below the dust suction port C. Depending on the situation, the curved sieve line 12a can be adjusted back and forth within the dust suction port range B.

For example, if the grain culm is dry and can be easily sucked into the dust removal fan 15, the curved sieve line 12d is positioned at the front end, and if the grain culm is damp, such as in the morning or after rain, it is sucked into the dust removal fan 15. Therefore, by retracting the curved sieve line 12a to the rear end position, a substantially uniform sorting state can be obtained regardless of the moisture content.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the combine, Figure 2 is a sectional side view of the threshing device showing only the sorting unit with the handling barrel removed, Figure 3 is a plan view of the sieve line section, and Figure 4 is the sieve line section. FIG. A...Obcillating sorting device, B...Dust suction port range, C...
...Dust suction port, 12a...Curved sieve line, 12b...
Fixed sieve line, 15...Dust removal fan.

Claims (1)

[Scope of utility model registration request] In a configuration in which a cross-flow fan type dust removal fan 15 is provided above the rear end of the swinging sorting device A in the threshing device, the dust removal fan 15 is installed from the rear end of the swinging sorting device A.
The sieve line 12 that protrudes to the bottom of the screen is composed of alternately arranged curved sieve lines 12a and fixed sieve lines 12b. A swinging sorting device for a combine harvester, which is characterized by being adjustable in position forward and backward.