JPH0463653B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a sheave on a swinging 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.

[Conventional technology]

In the oscillating sorting device of this type of threshing machine, if the gaps between the plates constituting the sheave are wide and the leakage area of paddy is larger than necessary, the separation effect of the sheave between straw waste and paddy will be impaired. Since this may not be carried out sufficiently and the proportion of straw waste mixed into the leaked material will be too high, the gap between the plates should be kept to the minimum necessary according to the maximum allowable sorting throughput of the oscillating sorting device. Generally, it is set as follows. However, even in this case, if the supply amount of the processed material decreases,
After all, the above-mentioned drawback that the ratio of straw waste to leakage increases is unavoidable. 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 unless the amount of material to be treated is extremely small. However, there is a problem in that the rate of leakage of paddy from the material to be treated on the sieve decreases, and sufficient treatment cannot be performed unless the treatment surface of the entire sieve is made extremely wide.

Therefore, conventionally, for example, the following [1] and [2]
The technology shown in the figure was adopted.

[1] By artificially manipulating each of the flat plates attached to the swinging frame, that is, by artificially changing the angle at which the plates are attached to the swinging frame, configured to adjust the gap between the

[2] A part of the oscillating sorting plate is composed of a large number of plates arranged in parallel in the processing material transfer direction, and each plate is configured such that one end of each plate is the center of swing and the other end is swingable up and down. However, it is configured to be biased toward the upper closing side by the pressing force of the sorting air, the suction pressure of the dust exhaust fan, or the biasing force of a spring (see, for example, Japanese Patent Application Laid-Open No. 16523/1983).

[Problem that the invention seeks to solve]

However, the conventional structure described in [1] above is useful in that the leakage area of the sheave surface can be changed by adjusting the gap between the plates, but it is difficult to artificially adjust the mounting angle of the plates. Therefore, it is impossible to obtain an appropriate gap by dealing with fluctuations in the amount of material to be processed during threshing, and the degree of adjustment also depends on the experience and intuition of the operator. Therefore, it was not always possible to make appropriate adjustments.

Furthermore, in a structure in which the gap between the plates is artificially adjusted and fixed as described above, no matter how narrow the gap is to accommodate the small amount of workpieces,
Gaps must be left in which the paddy can leak freely, and there is a risk that relatively long pieces of straw, which are supplied falling in an almost vertical position, may leak straight through the gaps. Even when the amount of material to be treated is small, it has not always been possible to separate long straw waste from paddy satisfactorily.

Furthermore, according to the prior art described in [2] above,
When the amount of material to be processed is small, blocking the holes in the sorting board with the board material is advantageous in that it can prevent large amounts of long straw waste from leaking out, but at the same time, it also prevents the leakage of paddy. Since the bottom portion is limited so that almost no portion is formed, the sorting process itself is not performed in that portion, which is disadvantageous in that the sorting area cannot be used effectively. Furthermore, even if a spring is used to bias the plate material toward the closing side, if the biasing force is set to be extremely weak so that a somewhat effective sorting process can be performed even when the amount of objects to be processed is small, Even if the amount of material to be processed increases even slightly, the plate material will shake significantly, causing too much material to be processed containing a large amount of straw to leak out, making it impossible to sort as expected. If set to a strong value, there is the disadvantage that sorting processing cannot be performed until the amount of material to be processed increases considerably, and in either case, the problem is that the response range to changes in the amount of material to be processed cannot be made very wide. It was hot.

The present invention makes it possible to appropriately set the leakage area of the sieve in response to fluctuations in the amount of material to be processed during threshing by improving the structure of the sieve, and also to rely on experience and intuition. In addition, when the amount of material to be processed is small, the desired sorting process can be carried out while effectively suppressing the leakage of long straw waste. The purpose is to obtain a swinging sorting device for the machine.

[Technical means to solve the problem]

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 biasing mechanism is provided that elastically biases 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 workpiece placed on the plate material; The plates are arranged at a distance from adjacent plates so that the gap width in plan view when the amount of material to be processed is small is zero, and there is a space on the upper surface of the plate. A projecting piece is formed that maintains the minimum width of the above-mentioned interval in the vertical direction to a width that allows leakage of paddy by contacting with an adjacent plate.

[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.

Furthermore, when the supply amount of the material to be treated is small, the width of the gap in plan view becomes zero, and long pieces of straw that are supplied falling in an almost standing position are once caught by the plate material and leak straight. This will reduce the risk of this happening.

Furthermore, in this state, although the gap width in plan view is zero, the gap width in the vertical direction is maintained to an extent that allows the passage of paddy by the protrusion formed on the top surface of the board. Therefore, even in this state, the sorting action on the objects to be processed continues as expected.

Furthermore, since the presence of the protrusion secures the upper and lower gaps, even if the biasing force of the biasing mechanism is set to a certain degree, it is possible to reliably sort a small number of objects to be processed, and Since sorting can be performed as expected when there is a large amount of objects to be processed, the response range of processing to changes in the amount of objects to be processed can be expanded.

〔Effect of the invention〕

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

In addition, when setting the leakage area, it is not set artificially based on experience or intuition, but is automatically set using the weight of the workpiece, so it is easy for the operator to set it. There is less risk of setting errors due to individual differences or uneven adjustment from time to time, and it is easier to set the leakage area more appropriately.

In addition, when the supply amount of the material to be treated is small, the gap width between the plates is set to zero in plan view, so that long straw waste does not leak straight through. Even when processing a small amount, where long straw waste tends to leak out due to the small total amount of the material to be processed, it is possible to prevent the long straw waste from being mixed in as much as possible, while allowing the leakage of paddy, and making it possible to Even when there is a large amount of waste, it is possible to carry out the desired sorting, and it has become possible to carry out processing with good sorting performance that can accommodate a wide range of changes in the amount of material to be processed.

〔Example〕

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

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 8 for collecting paddy. Sorting section 3 equipped with
It is broadly divided into.

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. The stroke rack 13 etc. provided at the location corresponding to the terminal side of the route,
It is configured to be integrally attached to the swing frame 5A, and the entire swing frame 5A is configured to be swing-driven by a well-known drive structure (not shown) such as a lever crank mechanism.

The chaff sheave 10, which is an example of a sheave according to the present invention, of the swing sorting device 5 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 of the plate materials 15 is formed into a substantially L-shape when viewed from the side, and the minimum width in the vertical direction of the above-mentioned interval S is set on the upper surface 15A side, that is, on the side to which the workpiece is supplied. By contacting the plate materials 15, 15,
A plurality of reinforcing pieces 16 are protruded at appropriate intervals to maintain the width to an extent that allows leakage of paddy. One of the reinforcing pieces 16 provided on one plate material 15 has an upwardly protruding piece portion 16A.
The upper protruding piece portion 16A is pivotally attached to a long connecting bar 17 having a U-shaped cross section. 15...Each reinforcing piece 16...
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.

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 6 has a shape along the radial direction away from the center of swing of the plate material 15 on both end sides thereof,
When the lower edge portion 19a of the protruding edge 19 is in contact with the boss portion 15b of the adjacent plate 15 (the state shown by the solid line in Figure 1), the gap S between the plates 15, 15 is at its minimum value ( ₁ ), so that the gap S becomes the maximum value ( ₂ ) when the upper edge portion 19b of the protruding edge 19 is in contact with the boss portion 15B of the adjacent plate 15 (as shown by the imaginary line in FIG. 1). A gap L is defined between the lower edge portion 19a and the upper edge portion 19b.

The minimum value ( ₁ ) 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 under normal working conditions. Even if it is set in this state, 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 ( 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 set to a value larger than that.

The arrangement interval of the plate materials 15 in the direction of transfer of the material to be processed (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 workpiece that is dropped and supplied from above. Once the material does not leak straight,
It is configured to be 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 comes into light contact with the boss portion 15B of the adjacent plate material 15, and as the amount of workpieces placed on the plate material 15 increases, it rotates downward as appropriate to expand the width of the gap S between the plate materials 15... It has been done.

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 plate materials 15 adjacent in the longitudinal direction are Although we have shown an example in which the width of the gap S can be obtained by independently operating the slits, it is possible to obtain a gap S width that corresponds well to the difference in the amount of material to be processed. It may be divided into more parts, or the entire plate 15 may be constructed as one piece without being divided in the longitudinal direction of the pivot shaft 14.

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

Furthermore, in the above embodiment, the plate materials 15 adjacent to each other in the direction of transfer of the processed material are pivotally connected by the connecting bar 17, but they may be connected by a wire or a coil spring, or , the plate materials 15 adjacent to each other 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 plate materials 15, so that the plate materials 15 adjacent to each other in the transfer direction are It may be configured so that both operate separately. 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 processed material using the chaff sieve 10 having the embodiment structure shown in FIGS. 1 to 3 will be explained based on FIG. 5. As shown in FIG. Of the processed materials, 20 paddy...and 2 garbage such as small straw waste were
1... rides on the upper surface 15A of the board 15 and then falls from the side gap S, but relatively long straw waste 22
Even if it falls in a standing position along the vertical direction, it is caught by the upper surface 15A of the plate material 15, and is sent out in the direction of transporting the workpiece (in the direction of arrow a) as the swinging frame 5A swings. In addition, as shown in FIG.
5A, one of the adjacent reinforcing pieces 16 prevents the lateral movement of the lower end side of the straw waste 22, and the protruding edge 1 of the other reinforcing piece 16
Since the upper end side of the straw waste 22 is supported in a state where 9 is used as a pillow, the straw waste 22 is completely laid down and the above-mentioned gap S
Furthermore, if the straw waste 22 that is fallen and supplied in a sideways position is longer than the distance between the adjacent reinforcing pieces 16, 16, it can be avoided from leaking from the bottom of the figure. Protruding edge 1 as shown
9 and 19, and leakage from the gap S can be avoided.

Although the chaff sheave 10 has been described as an example of the sheave according to the present invention, the grain sheave 12 may be used instead of the chaff sheave 10, or
It is free to apply the configuration of the present invention to both the chaff sheave 10 and the grain sheave 12.

[Brief explanation of the drawing]

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. Figure A is a sectional view, and Figure B is a view taken along the Ro-Ro line in Figure A. 5A...Swinging frame, 10, 12...Sheave, 15
... Plate material, 16 ... Projection piece, 18 ... Biasing mechanism, S
……gap.

Claims (1)

[Claims] 1. A sieve 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 swinging 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, and A biasing mechanism 18 that elastically urges the plate material 15 toward the gap closing side so that the amount of opening of the gap S increases in accordance with an increase in the weight of the object to be processed placed on the plate material 15. Further, the plate materials 15 are arranged with a defined spacing between adjacent plate materials 15, 15 such that the width S of the spacing in plan view is zero when the amount of supplied material to be processed is small. In addition, the plate material 15
On the upper surface side, there are projecting pieces 16 that maintain the minimum width of the interval S in the vertical direction to a width that allows leakage of paddy by contacting with adjacent plate members 15, 15.
A swinging sorting device for a threshing machine, characterized in that it has the following configuration: