JPS6232893B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a threshing machine that improves the posture of inserting grain culms into a handling chamber to prevent the occurrence of culm breakage, etc.

There are stationary types of threshing machines, and mobile types that are equipped with wheels and crawlers to make them movable.
There are some that are attached to self-retracting combine harvesters, but these have almost the same structure in their main parts. In other words, this type of threshing machine is equipped with a handling drum that rotates inside the handling chamber and a conveying device that runs along the handling chamber. The grain is inserted tangentially into the handling cylinder through a grain insertion port opened parallel to the axial direction of the grain, and is threshed by the handling teeth of the handling cylinder while being conveyed by a conveying device.

By the way, in this threshing work, if the grain culm being transported has the same point of contact with the handling barrel from the entrance to the exit of the handling chamber, and only that point is handled, the grain tip will be There are problems in that the grains become torn and untidy, reducing sorting efficiency and increasing grain loss. In order to solve this problem, it has been proposed and used to incline the conveying device and the grain culm insertion port so that they are lower on the entrance side of the handling chamber and higher on the exit side. By doing this, the insertion position of the grain culm into the handling chamber is almost horizontal on the entrance side, but as it goes towards the exit, it rises up, so the shaft center is fixed. The contact point of the grain culm with the handling trunk changes.

However, in such conventional devices, the grain culm extends straight along the inner surface of the handling chamber from the gripping part to the tip of the grain without being bent. There is a problem in that the handling teeth press the grain culm against the inner surface of the handling chamber, or push it through, resulting in a lot of straw waste and culm breakage, and this often occurs especially near the entrance of the handling chamber. Was.

The present invention has been made in view of the above-mentioned points, and the present invention has been made in such a way that the grain culm is pressed and bent by the vertical opening edge of the grain culm insertion port so that the culm direction is directed toward the axis of the trunk. By displacing the opening edge and the grain culm holding member in the vertical direction, the handling teeth can easily pass through, and the generation of straw waste and culm breakage due to the grain culm being pressed against the inner surface of the handling chamber can be prevented. To provide a threshing machine configured to prevent this.

Hereinafter, its configuration and the like will be explained in detail with reference to embodiments shown in the drawings.

This embodiment shows an example in which the threshing machine according to the present invention is implemented in a small-sized combine harvester with lower handling, and Fig. 1 is a side view of the combine in which this is implemented, Fig. 2 is a longitudinal cross-sectional view of the main parts of the threshing machine, FIG. 3 is a side sectional view, and FIG. 4 is an enlarged sectional view of the vicinity of the grain culm insertion port. In these figures, a combine harvester 1 includes a reaping machine 2, a threshing machine 3, a traveling section 4 carrying these and traveling,
and other attached equipment. Furthermore, the reaping machine 2 includes a pulling device 5 that pulls up grain culms in the field, a cutting blade 6 that reaps the root part of the pulled up grain culms, and conveys the harvested grain culms to a threshing machine 3. It is composed of a grain culm conveying device 7 and the like.

A threshing frame 10 is mounted on the running frame at the rear of the reaper 2, and is integrally formed with a handling chamber 8 and a sorting chamber 9 below the threshing chamber 8. A handling cylinder 12 having a large number of handling teeth 11 arranged on a surface and rotating in the direction indicated by arrow A in FIG. 2 is mounted on an axis. Also,
About half of the circumference of this handling cylinder 12 is the handling cylinder 1.
2 and a concentric arc-shaped handling chamber receiving net 13, and the upper part of the remaining half is covered with the handling trunk cover 1.
4. The sides are covered with a handling chamber casing 15 that is continuous with the handling chamber receiving net 13. Furthermore, the handling room 8 is
In order to insert the grain culm 16, a supply port 17 and a discharge port 18 are opened in the front and rear side plates, respectively.
Further, a grain culm insertion port 19 is opened in the handling chamber casing 15. Of these, the grain culm insertion port 19 is the third
As shown in the figure, it is formed to be vertically inclined so that the height increases from the supply port 17 toward the discharge culm port 18. Furthermore, an endless feed chain 20 is stretched on the side of the grain culm insertion port 19 and adjacent thereto, with its upper running end inclined along the grain culm insertion port 19 . Further, above the feed chain 20, several levers 22 are supported along the running end of the feed chain 20 and are connected in the longitudinal direction and urged toward the feed chain 20 by a compression coil spring 21. The base of the grain culm 16 is held between the grain culm 16 and the feed chain 20. The threshing machine 1 of this embodiment is of a lower handling type, and the tip of the grain culm 16 is inserted below the handling barrel 12.

In FIG. 2, the cross section near the supply port 17 of the handling chamber 8 is shown by a chain line, and the cross section near the culm discharge port 18 is shown by a solid line, and in FIG. 19 supply ports 1
The vicinity of the 7th side is shown enlarged. As is clear from these figures, in the vicinity of the supply port 17, as described above, the feed chain 20 and the clamping rod 22 are provided at a low position close to the horizontal plane passing through the lower end of the handling barrel 12. With,
The upper edge of the handling chamber casing 15 that is continuous with the handling chamber receiving net 13, that is, the lower opening edge of the grain culm insertion port 19 is formed to be farther upward than the gripping portion of the grain culm 16, as shown by t in the figure. ing. By doing so, the grain culm 16 is pressed upward and a space 23 is formed between the inner surface of the handling chamber 8, that is, the handling chamber casing 15, the handling chamber receiving net 13, and the grain culm 16.
is formed. In other words, the grain culm insertion port 19
The lower opening edge of the grain culm 16 is pressed upward so that the culm direction is directed toward the axis of the handling barrel 12, and the grain culm 16 is bent greatly. The grain culm holding member consisting of the clamping rod 22 is provided so as to be shifted in the vertical direction. Furthermore, if I may add, the grain culm 1 for the handling cylinder 12
By pressing the grain culm 16 fed in the tangential direction with the opening edge, the grain culm 16 is handled and deflected toward the center of the barrel 12.

In the combine harvester 1 configured as above, the grain culm 16 cut by the cutting blade 6 is conveyed to the threshing machine 3 by the grain conveying device 7, and the root portion is taken over by the feed chain 20, Further, the tip portion is supplied to the handling chamber 8 from the supply port 17. The grains are then conveyed toward the culm discharge port 18 while being held between the feed chain 20 and the clamping rod 22, but because the feed chain 20 and the like are vertically inclined, the grain culm 16 is The insertion posture is sequentially changed from the posture shown by the chain line in FIG. 2 to the posture shown by the solid line. In the vicinity of the supply port 17,
Since the grain culm holding position is low, the grain culm 16 tries to extend from this holding part along the inner surface of the handling chamber 8 toward the handling barrel 12, but the lower opening edge of the grain culm insertion opening 19 is in the holding part. Since the grain culm 16 is pushed upward, the grain culm 16 is bent into an arc shape, and a space 23 is formed between the grain culm 16 and the inner surface of the handling chamber 8. Therefore, the handling teeth 11 that have been rotating from above due to the rotation of the handling cylinder 12
The grain culm 16 is inserted between the stalks of the grain culm 16 and passes through very easily, and the grain culm 16 is handled in the chamber 8.
It does not push against the inner surface of the body or push it all the way down.

In addition, in this embodiment, the grain culm 16 is directly pressed by the opening edge of the grain culm insertion port 19, but another member may be attached to this part and the grain culm 16 may be pressed by this member. . Further, in this embodiment, the present invention was applied to a bottom-handling type threshing machine 2, but it can also be applied to a top-handling type threshing machine. In this case, the feed chain 20 and the clamping rod 22 are in the upside down position, the rotation direction of the handling barrel 12 is reversed, and the shape of the handling chamber casing 15 and the insertion posture of the grain culm 16 are all changed to the lower handling type. Since the grain culm 16 and the inner surface of the handling chamber 8 are almost symmetrical in the vertical direction, in order to form a space between the grain culm 16 and the inner surface of the handling chamber 8, the upper opening edge of the grain culm insertion port 19 or a It goes without saying that the member must be placed farther downward than the grain culm holding part. Further, the present invention can be applied not only to combine threshing machines but also to stationary and mobile automatic threshing machines that are not equipped with a reaper.

As is clear from the above description, according to the present invention, the grain culm transport path is provided to be inclined vertically with respect to the transport direction, and the grain culm is inserted into the culm center at the vertical opening edge of the grain culm insertion port. By shifting the opening edge and the grain culm holding member in the vertical direction so as to press and flex the grain so that the direction points toward the axis of the handling cylinder, the handling cylinder rotates around the grain by rotation of the handling cylinder. Since the teeth pass between the stems of the grain culms extremely easily, the grain culms are not pressed against the inner surface of the handling chamber or cut through, and the generation of straw waste and culm breaks is significantly reduced compared to conventional methods. This improves sorting efficiency and reduces grain loss.

[Brief explanation of the drawing]

Figures 1 to 4 show a threshing machine according to the present invention, Figure 1 is a side view of a combine harvester implementing this, Figure 2 is a vertical sectional view of the main part of the threshing machine, and Figure 3 is a side sectional view of the same. FIG. 4 is an enlarged sectional view of the vicinity of the grain culm insertion port. 3... Threshing machine, 8... Handling chamber, 12... Handling barrel, 16... Grain culm, 19... Grain culm insertion port, 20...
...Feed chain, 22...Holder, 23...
Space department.

Claims (1)

[Claims] 1 The grain culm 16 whose root portion is held between the grain culm holding members 20 and 22 is handled through the grain culm insertion port 19 and transferred to the trunk 12.
In a threshing machine that performs threshing while inserted in a tangential direction to The opening edge and the grain culm holding member 2 are pressed so that the culm direction of the grain culm is directed toward the axis of the barrel 12.
A threshing machine characterized in that 0 and 22 are shifted in the vertical direction.