JPH0119847B2 - - Google Patents

Description

Detailed Description of the Invention The present invention is a thresher mounted on a combine harvester or a stationary threshing machine, which uses a chaff sheave comprising a plurality of inclined horizontal plates for sorting threshed grains. This invention relates to improvements in dynamic sorting equipment.

As prior art, Japanese Utility Model Application Publication No. 54-152068 and Japanese Utility Model Application Publication No. 54-152069 disclose that, between the handling chamber of a threshing machine and a winnowing fan provided at the lower part thereof, the axis of the handling barrel in the handling chamber is A swinging sorting mechanism is provided with a pair of left and right side frame plates extending parallel to the swing sorting mechanism, and a part of the swinging sorting mechanism below the dust exhaust port in the handling chamber is placed between the pair of left and right side frame plates. A fixed chaff sheave is provided in which a plurality of inclined horizontal beams extending in a direction substantially perpendicular to the axis of the shell are arranged at appropriate intervals in a manner that the inclination cannot be adjusted. In the lower part, there is a swinging sorting device having a movable chaff sheave, which is made up of a plurality of inclined horizontal bars extending in a direction substantially perpendicular to the axis of the handling cylinder and arranged at appropriate intervals so that the inclination can be adjusted. Are listed.

Therefore, in the swinging sorting devices described in these publications, the chaff sheave installed below the dust exhaust port in the handling room is fixed, while the chaff sheave installed below the crimp net in the handling room is movable. This is intended to improve the sorting performance for grain threshing, but the lower edge of the inclined horizontal plate in the movable chaff sheave is pivoted with pins to the left and right side frame plates of the swing sorting mechanism. Because it was constructed so that the inclination could be adjusted freely,
There was a problem that the sorting performance deteriorated and the intended purpose could not be fully achieved.

That is, as in the above-mentioned publication, if each inclined horizontal plate in the movable chaff sheave is rotated around its lower end, the inclination angle is adjusted in relation to the amount of grain threshing. The upper edge of the inclined horizontal plate adjacent to the fixed type chaff sheave among the inclined horizontal plate in the movable chaff sheave,
Since it approaches and moves away from the inclined horizontal plate of the fixed type chaff sheave, the opening area of the upper surface of the gap between the movable and fixed type chaff sheaves is the same as that of the inclined horizontal plate of the movable As the angle is adjusted, it will become larger or smaller. For this reason, if the opening area of the upper surface of the gap between the fixed chaff sheave and the movable chaff sheave becomes large, the grains will be concentrated and fall in this gap, and the wind-selection effect will be insufficient, and conversely, If the opening area on the top surface of the gap becomes smaller, all of the threshed grains will be transported to the fixed chaff sieve without falling, or the threshed grains will become clogged in the gap, which will also deteriorate the sorting performance. So it was warm.

The object of the present invention is to prevent deterioration in sorting performance when the chaff sheave provided below the handling chamber is configured to be separated into a fixed type and a movable type in a swinging sorting device for a threshing machine. It is.

For this reason, the present invention provides a swing sorting mechanism that includes a pair of left and right side frame plates extending parallel to the axis of the handling barrel in the handling chamber, between the handling chamber of the threshing machine and the winnowing fan provided at the lower part thereof. A plurality of inclined horizontal bars extending in a direction substantially perpendicular to the axis of the handling cylinder are appropriately installed between the pair of left and right side frame plates of the swing sorting mechanism and below the dust exhaust port in the handling chamber. A fixed chaff sheave is provided which is disposed at an interval whose inclination cannot be adjusted, and a fixed chaff sheave is provided between the right and left frame plates below the crimp net in the handling chamber, and which extends in a direction substantially perpendicular to the axis of the handling cylinder. In a swing sorting device equipped with a movable chaff sheave in which a plurality of inclined horizontal bar plates are arranged at appropriate intervals so that the inclination can be adjusted, the upper end edge of each inclined horizontal bar plate in the movable chaff sheave is connected to the Rotatably pin-mounted to the left and right side frame plates at substantially the same height as the upper end edge of the inclined horizontal plate in the chaff sheave,
The lower end edge of each inclined horizontal bar plate in the movable chaff sheave is formed into an arc shape bored in the left and right frame plates so that the tilt angle of the inclined horizontal bar plate in the movable chaff sheave can be freely adjusted around its upper end edge. The structure is such that they are respectively engaged with long slot holes.

With this configuration, the inclined horizontal bar plate in the movable chaff sheave rotates around its upper edge, and the upper edge is at approximately the same height position as the upper edge of the inclined horizontal bar plate in the fixed chaff sheave. From this, the distance between the upper edge of the inclined horizontal plate in the movable chaff sheave and the upper edge of the inclined horizontal plate in the fixed type chaff sheave at the adjacent location between the fixed chaff sheave and the movable chaff sheave is It does not change as the angle of the crosspiece plate is adjusted, and therefore, the opening area of the upper surface of the gap at the adjacent location between the movable chaff sheave and the fixed chaff sheave is independent of the angle adjustment of the inclined horizontal crosspiece plate in the movable chaff sheave. It will be held approximately constant.

Therefore, according to the present invention, since the opening area of the upper surface of the gap between the fixed chaff sheave and the movable chaff sheave can be maintained constant, the grain threshing that is subjected to the rocking action on the upper surface of the chaff sheave is concentrated in the gap region. This prevents the chaff sheave from falling into the gap or being obstructed from falling into the gap, and ensures that the sorting performance will not deteriorate when the chaff sheave is configured to be separated into a fixed type and a movable type. It has the effect of preventing

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a handling chamber containing a handling cylinder 2, and a crimp screen 4 is provided at the bottom of the chamber, excluding the dust outlet 3.
is installed.

Reference numeral 5 indicates a swinging sorting mechanism supported by a link 5a, and the swinging sorting mechanism 5 includes a pair of left and right side plates 6, 6 extending in the axial direction of the handling cylinder 2, and the side plates 6, 6. A feed pan 7 is provided between the front parts of the crimp net 4 and a grain board 8 is provided between the rear parts of the crimp net 4.
As will be described in detail later, a movable chaff sheave 9, which is made up of a plurality of inclined horizontal bars 22 extending perpendicularly to the axis of the handling cylinder 2 and adjustable in inclination at appropriate intervals, is connected to the dust exhaust port 3. A plurality of inclined horizontal beam plates 1 are provided below, extending in a direction substantially perpendicular to the axis of the handling cylinder 2.
0 are disposed at appropriate intervals in a non-adjustable inclination manner. A screening net 14 is provided below the sieve line 13 and both chaff sieves 9 and 11, respectively.

Further, below the swing sorting mechanism 5, there is a winnowing fan 15 that blows air toward the sorting net 14, a No. 1 screw conveyor 17 with a grain gutter 16, and a No. 2 screw conveyor 19 with a grain gutter 18. is installed.

The movable chaff sheave 9 in which the inclination angle of each of the inclined horizontal beams 22 can be adjusted is constructed as follows.

In other words, the movable chaff sheave 9 includes a pair of left and right side frame plates 21, 21 that are removably attached to the inside of the left and right side plates 6, 6 in parallel with the left and right side plates 6, 6 of the swing sorting mechanism 5 with bolts 20, etc.; It consists of a large number of inclined horizontal crosspiece plates 22 arranged in parallel at appropriate intervals between the plates 21, 21, and the both side frame plates 21, 21 have approximately the same height as the upper edge of the inclined horizontal crosspiece plate 10 of the fixed chaff sheave 11. Upper pin insertion holes 23 are bored at the installation intervals of the respective inclined horizontal beams 22, and below the upper pin insertion holes 23, arcuate long groove holes 24 are formed with the centers of the upper pin insertion holes 23. Pin insertion hole 23
In the same manner as above, holes are bored at the mounting intervals of each inclined horizontal bar plate 22.

On the other hand, each inclined horizontal bar plate 22 is formed into an L-shaped cross section by bending its lower edge upward or downward, and horizontal bar plate mounting pieces 25 made of synthetic resin are attached to both longitudinal ends thereof. An upper pin 26 protruding from the outer surface of the upper end of the horizontal frame plate mounting piece 25 is attached to the side frame plate 2.
By rotatably inserting it into the upper pin insertion hole 23 in 1 and 21, the inclined horizontal bar plate 22 is configured to rotate around its upper edge, while the lower end of each horizontal bar plate mounting piece 25 The horizontal frame plate angle adjustment pin 27 protruding from the outer surface is connected to the both side frame plates 21,
21, so that the inclination angle of each inclined horizontal bar plate 22 can be freely adjusted by slidingly inserting them into the arc-shaped long slot holes 24 in the horizontal bar plate 21, and furthermore, the horizontal bar plate angle adjustment pins 27 are inserted into the both side frames. It protrudes to the outside of the plates 21, 21, and the protruding ends are connected to the frame plates 21, 21 on both sides.
By engaging with the angle adjustment rods 28, 28 arranged substantially parallel to the longitudinal direction on the outer surface of 21, each inclined horizontal bar plate is adjusted as the angle adjustment rods 28, 28 slide in the longitudinal direction. 22 are configured so that their angles are adjusted all at once.

In this case, by making the width dimension of both angle adjustment rods 28 smaller than the dimension in the vertical direction height direction of the arcuate long groove hole 24, the horizontal bar angle adjustment pin in each inclined horizontal bar plate 22 can be adjusted. 27 is located at the upper end of the arc-shaped long groove hole 24, that is, when the inclination angle of each inclined horizontal bar plate 22 is minimized,
The lower end of each of the long groove holes 24 is configured to open from the lower surface of the angle adjustment rod 28.

On the other hand, an adjustment shaft 29 is pivotally supported between the left and right frame plates 21, 21 in parallel with each inclined horizontal frame plate 22, and the angle adjustment rod 28 is attached to arms 30, 30 fixed to both ends of the adjustment shaft 29. , 28 are connected by pins 31, 31, and both angle adjustment rods 2 are connected by rotating the adjustment shaft 29.
8 and 28 move simultaneously in the same direction, and a lever 34 is fixed to one end of a pipe 33 to which a bolt 32 is removably fastened to the adjustment shaft 29. A spring 35 is mounted between the side plate 6 and the horizontal plate 22 to urge each inclined horizontal bar plate 22 in the horizontal direction, while the other end of the lever 34 is connected to a suitable location such as a threshing machine operating section near the operator seat of a combine harvester. It is movably connected via a wire 37 to an adjustment lever 36 provided at the location.

Note that the wire 37 is a flexible cable conduit 38.
One end 38' of the cable conduit 38 is fixed to the side plate 6 of the swing sorting mechanism 5, and the other end 38'' is fixed to the location where the adjustment lever 36 is attached, and the cable conduit 38 is fixed to the side plate 6 of the swing sorting mechanism 5, and the other end 38'' is fixed to the location where the adjustment lever 36 is attached. Even if the sorting mechanism 5 swings,
The inclination angle position of each inclined horizontal bar plate 22 by the adjustment lever 36 is configured not to change.

In this configuration, the threshed grains leaking from the crimp net 4 in the handling chamber 1 fall onto the upper surface of the feed pan 7 and the movable chaff sheave 9, and are sequentially sent from above the feed pan 7 to the upper surface of the movable chaff sheave 9 by a rocking motion. While being conveyed toward the fixed chaff sheave 11, it falls onto the sorting net 14 from between the inclined horizontal bars 22 of the movable chaff sheave 9,
On the sorting net 14, the dust is sorted by the wind blowing from the windmill fan 15 so that it is sucked into the dust exhaust fan 12, and then it is passed through the grain gutter 16 to the No. 1 screw conveyor 17 outside the machine. sent to.

In addition, large dust that could not leak through the crimp net 4 falls from the dust exhaust port 3 of the handling room 1 onto the upper surface of the fixed chaff sheave 11 provided below, and is caused by its swinging and the wind blowing. As they are being sequentially fed along the sieving line 13, the heavy grains with paddy fall from between the inclined horizontal bars 10 of the fixed chaff sieve 11 onto the No. 2 screw conveyor 19, and are transferred to the No. 2 screw conveyor 19. While it is returned to the handling room 1 by a No. 2 return thrower (not shown) installed at one end of the conveyor 19, light and large straw waste is sucked into the dust exhaust fan 12 from the tip of the sieve line 13, or left outside the machine as it is. It is discharged.

When the adjustment lever 36 is rotated in the direction of the arrow a, the inclination angle of each inclined horizontal bar plate 22 in the movable chaff sheave 9 increases at the same time, and conversely, when the adjustment lever 36 is operated in the direction of the arrow b,
Each inclined horizontal plate 22 in the movable chaff sheave 9
Since the angle of inclination decreases all at once as it approaches horizontality, by changing the angle of inclination of the inclined horizontal bar plate 22, it is possible to maintain optimal sorting performance according to the amount of threshed grain.

In this case, each inclined horizontal bar plate 22 in the movable chaff sheave 9 has its upper end edge pivoted to the side frame plate 21 by a pin 26 at approximately the same height as the upper end edge of the inclined transverse bar plate 10 in the fixed chaff sheave 11. Since the angle is adjusted by doing this, the opening area of the upper surface of the gap at the adjacent location between the fixed chap sheave 11 and the movable chap sheave 9 is approximately equal to It will be kept constant.
Therefore, if the gap between the fixed chaff sheave 11 and the movable chaff sheave 9 is opened more than necessary, the grain threshing may fall intensively into the gap, or the opening area of the upper surface of the gap may be reduced. By making the grain smaller, it is possible to prevent the threshing from clogging or being transported to the fixed chaff sheave 11 without falling into a gap.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view of the main parts of a threshing machine, FIG. 2 is an enlarged partially cutaway view of a chaff sheave, and FIG. 3 is an enlarged sectional view of FIG.
Figure 4 is a cross-sectional view of Figure 2, and Figure 5 is a cross-sectional view of Figure 2.
FIG. 6 is a sectional view of FIG. 5, and FIG. 6 is a side view of FIG. 1... Handling room, 2... Handling cylinder, 4... Crimp net, 5... Rocking sorting mechanism, 6... Left and right side plates, 9... Movable chaff sheave, 11... Fixed chaff sheave, 10... Inclined horizontal plate of fixed chaff sheave, 21...side frame plate, 22
...Slanted horizontal bar plate of movable chaff sheave, 23... Upper pin insertion hole, 24... Arc-shaped long groove hole, 26... Upper pin, 27... Horizontal bar plate angle adjustment pin, 28... Angle adjustment rod.

Claims (1)

[Claims] 1. A swing sorting mechanism is provided between the handling chamber of the threshing machine and the winnowing fan provided at the bottom thereof, and is equipped with a pair of left and right side frame plates extending parallel to the axis of the handling barrel in the handling chamber, and the A plurality of inclined horizontal bars extending in a direction substantially perpendicular to the axis of the handling barrel are arranged at appropriate intervals in a region below the dust exhaust port in the handling chamber between the pair of left and right side frame plates of the sorting mechanism, and the inclination cannot be adjusted. A fixed chaff sheave is provided, and a plurality of inclined horizontal sheets extending substantially perpendicular to the axis of the handling cylinder are provided between the right and left frame plates in a portion below the crimp net in the handling chamber. In a swinging sorting device equipped with a movable chaff sheave in which crosspiece plates are arranged at appropriate intervals so that the inclination can be adjusted, the upper end edge of each inclined horizontal crosspiece plate in the movable chaff sheave is connected to the inclined horizontal crosspiece in the fixed type chaff sheave. The pins are rotatably attached to the left and right side frame plates at substantially the same height as the upper edge of the plate, and the lower edge of each inclined horizontal plate in the movable chaff sheave is connected to the inclined horizontal plate in the movable chaff sheave. A rocking sorting device for a threshing machine, characterized in that the horizontal rail plates are engaged with arc-shaped long slot holes bored in the left and right side frame plates so that the inclination angle can be freely adjusted around the upper edge of the horizontal rail plate.