JPH0424964B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention comprises a sheave on a swing frame, which is made up of a large number of groups of plates arranged in parallel at appropriate intervals in the direction of transfer of the processed material, and While the object to be processed, which is a mixture of straw waste and paddy placed on the board, is transferred in one direction as the swinging frame swings, the paddy in the object to be processed is moved through the gap formed between the plates. The present invention relates to a swing sorting device for a threshing machine configured to allow water to leak from the grain.

[Prior Art] In this type of swinging sorting device of a threshing machine, if the gaps between the plates constituting the sheave are wide and the leakage area of paddy is larger than necessary, the sheave will not separate straw waste and paddy. There is a problem that the separating action cannot be performed sufficiently and the proportion of straw waste mixed into the leaked material becomes too large. Therefore, the gap between the plates is adjusted to the maximum allowable throughput of the swinging sorting device. Generally, it is set to the minimum necessary. However, even in this case, when the supply amount of the material to be treated decreases, the disadvantage that the ratio of straw waste to the leakage material increases as described above cannot be avoided. Considering only to avoid an increase in the proportion of straw waste mixed in with the leaked material, it is sufficient to make the gap between the plates sufficiently narrow, but this will not work if the amount of material to be treated is extremely small. Otherwise, the rate of leakage of paddy from the material to be treated on the sieve decreases, and there is a problem that sufficient treatment cannot be carried out unless the entire treatment surface of the sieve is made extremely wide.

Therefore, in the past, each plate attached to the swinging frame was manually manipulated, that is, the angle at which the plate was attached to the swinging frame was artificially changed, and the gaps between the plates were removed. The gap was adjusted.

[Problem that the invention seeks to solve]

The conventional structure described above is useful in that it is possible to change the leakage area of the sheave surface by adjusting the gap between the plates, but since the installation angle of the plates is artificially adjusted, it is difficult to thresh. It is impossible to obtain an appropriate gap by dealing with fluctuations in the amount of material to be processed during work, and the degree of adjustment depends on the experience and intuition of the operator, so it is not always possible to obtain an appropriate gap. It was not always something that could be adjusted.

In addition to improving the structure of the sieve, the present invention can deal with fluctuations in the amount of material to be processed during threshing and appropriately set the leakage area of the sieve.
Another object of the present invention is to provide a swing sorting device for a threshing machine that can reduce errors in setting the leakage area due to reliance on experience and intuition.

[Technical means to solve problems]

The technical means of the present invention taken to achieve the above object is such that, in the above-mentioned swing sorting device for a threshing machine, each of the plates is pivotally attached to the swing frame, and The gap between adjacent plates can be changed wide or narrow as the plates swing, and
A mechanism is provided for elastically biasing the plate material toward the gap closing side so that the amount of opening of the gap increases in accordance with an increase in the weight of the object to be processed placed on the plate material.

[Effect]

As a result of taking the above technical measures, when the amount of material to be processed increases on the sieve, the weight of the material causes each plate to resist the elastic biasing force and open the gap between the plates. In other words, it swings to expand the leakage area, and conversely, when the supply amount of the material to be processed decreases, it swings toward the gap closing side due to the elastic biasing force and acts to reduce the leakage area. Moreover, this function can be performed automatically.

〔Effect of the invention〕

The above-mentioned effect makes it possible to obtain an appropriate leakage area according to the weight of the material to be processed, that is, the amount of material to be processed, regardless of changes in the amount of material to be processed.

In setting the leakage area, the leakage area is not set artificially based on experience or intuition, but is automatically set using the weight of the workpiece. There is less risk of setting errors due to differences or occasional adjustment irregularities, and it is easier to set the leakage area more appropriately.

〔Example〕

The oscillating sorting device for a threshing machine according to the present invention is used as one mounted on a combine harvester, a harvester, or a built-in device in a stationary threshing machine.

Figure 4 shows threshing device 1 of the oscillating sorting device of the threshing machine.
The threshing device 1 includes a threshing section 2 equipped with a handling drum 4, a swinging sorting device 5, a draft fan 6, and a first screw 7 and a second screw for collecting paddy. 8 and a sorting section 3.

The oscillating sorting device 5 includes a chaff sheave 10 provided below the crimp net 9 below the threshing section 2, a grain pan 11 and a grain sieve 12 provided below the grain pan 11, and a grain sieve 12 that performs the sorting process more than the grain sieve 12. It is configured by integrally attaching the stroke rack 13 and the like provided at a location corresponding to the end side of the path to the swing frame 5A, and uses a well-known drive structure (not shown) such as a lever crank mechanism. The entire swing frame 5A is configured to be swing-driven.

Of the swing sorting device 5, the chaff sheave 10, which is an example of a sheave according to the present invention, is configured as described below.

As shown in FIGS. 1 to 3, a large number of long pivot shafts 14 are installed along the width direction of the swing frame 5A (direction perpendicular to the direction of transfer of the object to be processed), A plate member 15 divided into three parts in the length direction of the pivot shaft 14 is pivotally attached to each of the pivot shafts 14 so as to be freely swingable.

Each plate material 15 is formed into a substantially L-shape when viewed from the side, and a plurality of reinforcing pieces 16 are protruded at appropriate intervals on the upper surface 15A side, that is, the side to which the processed material is supplied. There is. One of the reinforcing pieces 16 provided on one plate material 15 is formed with an upwardly protruding portion 16A.
6A is pivotally attached to a long connecting bar 17 having a U-shaped cross section, and the connecting bar 17 is
The reinforcing pieces 16 on each of the plate materials 15 lined up in the direction of transfer of the processed material are connected to each other, and one end thereof is connected to the swing frame 5A via a coil spring 18, which is an example of an elastic biasing mechanism. It is connected.

Among the reinforcing pieces 16..., the reinforcing piece 1 in the center position is provided with the upwardly protruding piece portion 16A.
The protruding edge 19 of the plate member 15 has a shape extending in the radial direction away from the swing center of the plate material 15 on both end sides, and the lower edge portion 19a of the protruding edge portion 19 of the protruding edge portion 19 is attached to the boss portion 15B of the adjacent plate material 15. State of contact (first
In the state indicated by the solid line in the figure), the gap S between the plates 15, 15 becomes the minimum value l ₁ , and the upper edge portion 19b of the protruding edge 19 abuts the boss portion 15B of the adjacent plate 15 (see Figure 1). the lower edge portion 19a so that the gap S becomes the maximum value _l2 in the virtual line state).
A distance L is determined between the upper edge portion 19b and the upper edge portion 19b.

Note that the minimum value _l1 of the gap S is preferably a size appropriate for processing the minimum amount of material to be processed that is supplied onto the chaff sieve 10 in normal working conditions, but if the gap S is completely closed, However, if the biasing force of the coil spring 18 is made sufficiently weak, even a small amount of objects to be processed can be handled, so such a structure may be used. Further, the maximum value l ₂ of the gap S may be set to a size appropriate for processing the predicted maximum supply amount of the workpiece, but it may be larger than that.

The arrangement interval of the plate materials 15 in the direction of transfer of the material to be processed (direction of arrow a) is determined in plan view when there is no material to be processed on the plate material 15 and in a state where the amount of material to be processed is small. The gap S is set so that it is not visible, that is, the free end of the plate material 15 vertically overlaps the boss portion 15B of another plate material 15 adjacent in the transport direction, and the material that is dropped and supplied from above is set. The processed material does not leak straight,
It is configured so that it is once received by the upper surface 15A of the plate material 15, and then turned horizontally and dropped from the side.

The tensile force of the coil spring 18 is
Plate material 15...lower edge portion 19a of the protruding edge 19 of the reinforcing piece 16 in a state where the amount of the processed material placed on it is small
is set so that it lightly contacts the boss portion 15B of the adjacent plate material 15 and rotates downward as appropriate depending on the amount of the workpiece placed on the plate material 15 to enlarge the width of the gap S between the plate materials 15... be.

In the above embodiment, the plate members 15... are connected to their pivot shafts 1
4 is divided into three parts in the longitudinal direction, and even if the amount of material to be processed that is dropped and supplied from above differs in the width direction of the chaff sheave 10, the plates 15 adjacent in the longitudinal direction can be separated from each other correspondingly. By operating the
Although we have shown an example of a configuration in which the gap S width can be obtained that corresponds well to the difference in the amount of objects to be processed, it is not limited to the above-mentioned three divisions, but may also be divided into two, four or more divisions. Alternatively, the entire plate 15 may be constructed as a single piece without being divided in the longitudinal direction of the pivot shaft 14.

It is preferable that the plate material 15 is made of relatively lightweight sheet metal or synthetic resin, but if it is properly set to balance the biasing force of the biasing means such as the coil spring 18, it may be made of cast metal or aluminum die-casting. Alternatively, other materials may be used.

Furthermore, in the above embodiment, the plates 15 adjacent to each other in the transfer direction of the processed material are pivotally connected by the connecting bar 17, but they may also be connected by a wire or a coil spring, or The plates 15 adjacent in the transfer direction are not connected to each other at all, but an elastic biasing mechanism such as a helical spring is provided between the swing frame 5A and the plates 15, so that the plates 15 adjacent in the transfer direction operate separately. It may be configured as follows. In this case, if the plate material 15 is divided in the longitudinal direction of the pivot shaft 14, the plate material 15 at a position away from the swing frame 5A will also be different from the plate material 15 on the side closer to the swing frame 5A. , it is necessary to connect them with a helical spring or the like so that the desired biasing force can be obtained.

Next, the processing state of the objects to be processed using the chaff sheave 10 having the above structure will be explained based on FIG. 5. As shown in FIG. 20... and dust 21... such as small straw waste are placed on the upper surface 15 of the board 15.
After getting on A, it falls from the gap S on the side, but
Even if the relatively long straw waste 22 falls in a standing position along the vertical direction, it will fall on the top surface 15 of the board 15.
A and sent out in the direction of transporting the object to be processed (arrow a) as the object is oscillated by the oscillating frame 5A.
In addition, as shown in FIG. 2B, the straw waste 22 in a long standing position shifts in the width direction of the chaff sheave 10 and falls sideways along the upper surface 15A of the board 15, causing it to leak from the gap S. In this case, one of the adjacent reinforcing pieces 16 prevents the lateral movement of the lower end of the straw waste 22, and the upper end of the straw waste 22 is supported with the protruding edge 19 of the other reinforcing piece 16 acting as a pillow. Therefore, the straw waste 22 that is completely laid down on its side and leaked from the gap S can be avoided.
If it is longer than the interval between the adjacent reinforcing pieces 16, 16, it will be in a state where it is bridged between the protruding edges 19, 19, as shown in FIG. It is something that can be done.

In addition, although the chaff sheave 10 has been explained as an example of the sheave referred to in the present invention, the chaff sheave 10 and the grain sheave 12 may be used instead of the chaff sheave 10.
It is free to apply the configuration of the present invention to both.

[Brief explanation of drawings]

The drawings show an embodiment of the swing sorting device for a threshing machine according to the present invention, and FIG. 1 is a sectional view of a sheave portion, and FIG.
The figure is a perspective view of the sheave part, Figure 3 is a schematic plan view of the entire sheave, Figure 4 is a sectional view showing the entire threshing device part, and Figures 5A and 5B are explanatory diagrams of the operating state of the sheave. A in the same figure is a sectional view, and B in the same figure is a view taken along the Ro-Ro line in A in the figure. 5A...Swinging frame, 10, 12...Sheave, 15
... Plate material, 18 ... Elastic biasing mechanism, S ... Gap.

Claims (1)

[Claims] 1. A sheave 1 consisting of a large number of plate materials 15 arranged in parallel at appropriate intervals in the direction of transfer of the processed material.
0 and 12 on the swing frame 5A, and the sheave 10
While the object to be processed, which is a mixture of straw waste and paddy placed on top, is transferred in one direction as the swinging frame 5A swings, the paddy in the object to be processed is transferred between the plate materials 15... In the swing sorting device of a threshing machine configured to leak from the gap S formed, the plate material 15
... are pivotally connected to the swing frame 5A, and the gap S between the adjacent plate materials 15, 15 can be changed to be wide or narrow as each plate material 15... swings, The plate material 15... is the plate material 15...
A threshing machine characterized by being provided with a mechanism 18 that elastically urges the gap toward the closing side so that the amount of opening of the gap S increases in accordance with the increase in the weight of the object to be processed placed thereon. Oscillating sorting device.