JPH039624Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a disk type cutter at the rear of the threshing machine mounted on a combine harvester, opens the part directly below the cutter that faces the dust outlet of the threshing machine, and provides a transfer spiral below it. As a result, the transfer spiral is installed below the cutter device, and the cut straw is transferred laterally while maintaining good sorting without interfering with the exhaust air from the dust outlet of the threshing machine. The present invention relates to a straw transfer device that transports cut straw to the ground and reliably discharges it to the mowed field.

As shown in FIG. 5, the conventional cut straw transfer device has a spiral bottom plate 18 for transferring cut straw with a spiral bottom plate 18 on the side of the threshing machine.
It was formed diagonally upward toward the threshing machine along the tangent to the curved gutter directly below No. 4. However, when the spiral bottom plate 18 is formed in this way, the cut straw falling from the cutter can be received over a wide area, but on the other hand, the cut straw repelled by the rotation of the spiral 14 is absorbed by the spiral bottom plate 1.
The sorting particles collided with the above-mentioned slope of No. 8, were repelled diagonally forward and upward as shown by arrow B, and entered the threshing machine through the dust outlet 9b opened at the rear of the threshing machine and between the second flow plate 22 and the bottom wall 21. There was a defect that made it defective.

In view of these conventional deficiencies, the present invention specifically addresses the following:
The threshing machine side portion of the spiral bottom plate 18 is extended obliquely upward toward the threshing machine side, and its upper edge portion is bent in the opposite direction to the extending direction, so that the cut repelled by the spiral 14 is formed by the bent portion. This prevents straw from scattering into the threshing machine and ensures good sorting.

One embodiment of the present invention will be explained with reference to FIGS. 1 to 3. In the figure, 1 is a frame of a combine supported by a crawler 2 for running, a thresher 3 is mounted on the upper part, and a threshing machine 3 is mounted in the front. A reaping device 4 is supported on the section. 5 is a handling barrel installed in the handling chamber 6 of the threshing machine 3, and 7 is a feed chain supported on the side thereof. Reference numeral 9 denotes a dust exhaust fan, which is installed at the upper end of the dust exhaust chamber 8, and is configured to suck small dust particles in the dust exhaust chamber 8 and discharge them from an exhaust port 9a facing downwardly at the rear. .

Reference numeral 10 denotes a swinging sorting body that swings in the longitudinal direction of the machine body, and is supported in a sorting air passage formed from below the handling chamber 6 to below the dust removal chamber 8. A dust exhaust port 9b is formed between the lower edge of the rear wall 8a of the dust exhaust chamber 8 and the terminal end 10a of the swing sorting body 10.

Reference numeral 11 denotes a disk-type cutter device provided at the rear of the dust removal chamber 8, and is constructed by having two horizontal shafts each having a large number of saw blades 12 and scraping teeth 13 arranged in front and behind each other.

7a is a straw removal chain, which is stretched from the end of the feed chain 7 to above the cutter device 11;
It is now being supplied to

Reference numeral 14 denotes a transfer spiral disposed horizontally below the cutter device 11, which transfers the cut straw cut by the cutter device 11 in the horizontal direction and discharges it to the mown field side so that it does not interfere with the next process. The spiral 14
The support shaft 14a is attached to the outer wall 15 on the feed chain 7 side.
The spiral blade 14b is pivotally supported at two locations on the inner wall 16 spaced apart from each other in a direction parallel to the inner wall 16, and a spiral blade 14b is fixed to a portion projecting inward from the inner wall 16. Further, the upper part of the inner wall 16 is bent upward and slopes downward toward the outer wall, so that the cut straw falling from the cutter device 11 is reliably guided to the spiral blade 14b.

A bottom plate 18 is provided below the transfer spiral 14, and has one end fixed to the inner wall 16 and projects inward. Further, the transfer spiral 14 protrudes from the edge of the bottom plate 18 by a length l within one pitch of the blade, and has a short cantilever structure to reduce weight and improve the balance between the front and rear of the aircraft. Yes, but
It is configured to prevent cut straw from clogging at the edge of the bottom plate and to ensure reliable transfer to the mown field.

The bottom plate 18 extends diagonally upward with the threshing machine side portion facing the threshing machine side, and has a rising portion 1 at its tip.
8a is provided, and its upper edge is bent rearward to form a repulsion prevention portion 18b.

Note that 19 is a spacer made of an elastic body bonded to the oscillating sorting body 10 to close the gap between the oscillating sorting body 10 and the side wall of the sorting chamber, and 20 is a cover made of an elastic body attached to the tip of the bottom wall 21. The tip thereof is in sliding contact with the back surface of the second flow plate 22 to close the gap between the second flow plate 22 and the bottom wall 21.

The one shown in FIG. 4 is another example of a large combine harvester, in which the spiral bottom plate 18 is provided halfway into the sorting chamber, and a repulsion prevention part 18b is formed near the threshing machine. In addition, it is structured as follows.

The transfer spiral 14 is configured to extend to the side wall 3a opposite to the feed chain 7 side and to be supported at both ends. Further, the position of the transfer spiral 14 is located above the direction of the exhaust air of the dust exhaust fan 9, as shown in FIG. In large combine harvesters, the amount of waste straw supplied to the cutter device 11 per unit time is large, and therefore the amount of cut straw transferred by the transfer spiral 14 is also large. It is necessary to disperse the cut straw on the mowed field side so that it does not interfere with later tilling work, etc., but the feed chain side portion (uncut field side portion) of the cut straw is separated by the transfer spiral 14 and the spiral bottom plate 18. At the long extension part of the transfer spiral 14 where the spiral bottom plate 18 is not present, the straw is forced to be transferred to the ground side and joins the cut straw from the mown field side that falls directly from above, and these straws are transferred to the spiral 14. It is dispersed and discharged by the long extension part of the . still,
At this time, the strong exhaust air blown from the dust exhaust fan 9 does not directly hit the transfer spiral 14, so the dispersion effect of the transfer spiral 14 is not hindered by this exhaust air, and the cut straw is reliably placed on the mowed field side. Dispersed and discharged.

Next, to explain the operation and effect of the present invention, the grain culms harvested and transported by the reaping device 4 are threshed by the handling cylinder 5 while being held by the feed chain 7, and the waste straw is transferred rearward by the straw removal chain 7a, and then is supplied to the device 11.

At this time, although the transfer spiral 14 is provided below the cutter device 12, the portion facing the dust outlet 9b of the threshing machine 3 is open.
There is no problem in sorting.

The cut straw that has been cut by the cutter device 11 and falls near the feed chain 7 falls onto the transfer spiral 14 and is caught by the spiral bottom plate 18 in the direction toward the mowed field side by the rotating transfer action of the blades 14b. The cut straw is transferred to the helical bottom plate 18 and released from the end of the spiral bottom plate 18, and is discharged onto the cut ground together with the cut straw that falls directly to the ground from the cutter device 11.

At this time, as shown in FIG. 2, the cut straw is repelled by the rotation of the transfer spiral 14, but the arrow A in FIG.
Thus, the cut straw is not scattered into the threshing machine 3 because it is blocked by the repulsion prevention part 18b, and therefore, the cut straw does not enter the sorting chamber and cause a sorting failure.

In this way, the present invention provides a disk-shaped straw cutter 11 at the rear of the thresher 3, opens the portion directly below the straw cutter 11 facing the dust outlet 9a of the threshing machine 3, and cuts the straw below it. In a device provided with a transfer spiral 14 for laterally transferring and discharging cut straw, the portion of the transfer spiral bottom plate 18 on the threshing machine side extends diagonally upward toward the threshing machine, and the upper edge portion thereof is extended as described above. Since it is bent in the direction opposite to the output direction, the transfer spiral 14 is provided below the cutter device 11, but it does not interfere with the sorting of the threshing machine 3, and the spiral bottom plate The threshing machine side part 18 extends obliquely upward toward the threshing machine to receive cut straw over a wide area, and a repulsion prevention part 18b is formed on the extended upper edge. The prevention part 18b reliably prevents the cut straw repelled by the transfer spiral 14 from scattering into the sorting part of the threshing machine 3, thereby achieving good sorting.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the device of the present invention, in which Figure 1 is an overall side view of the combine harvester, Figure 2 is a side sectional view of the main parts, and Figure 3 is a rear view of the combine harvester. FIG. FIG. 4 is a rear sectional view of another embodiment of the combine harvester, and FIG. 5 is a side sectional view for explaining the conventional example. 3...Thresher, 11...Cutter device, 14...
...Transfer spiral, 18...Spiral bottom plate, 18b...Repulsion prevention part.

Claims (1)

[Scope of utility model registration request] A disk-shaped straw cutter 1 is installed behind the threshing machine 3.
1, the part directly below the straw cutter 11 facing the dust outlet 9b of the threshing machine 3 is opened, and a transfer spiral 14 is provided below which transfers and discharges the cut straw in the lateral direction. , the transfer spiral bottom plate 18
A cut straw transfer device characterized in that the threshing machine side portion of the straw is extended obliquely upward toward the threshing machine side, and the upper edge portion thereof is bent in the opposite direction to the extending direction.