JP6731708B2 - Threshing equipment - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a threshing device in which a sorting unit is provided with a chaff sieve for sorting a threshing target object.

Conventionally, in the sorting unit of the threshing device, a large number of chaflip plates along the longitudinal direction in a direction intersecting with the transfer direction of the object to be processed are provided with chaff sheaves arranged side by side in the transfer direction. 2. Description of the Related Art There is known a structure in which a sorting/falling path for sorting and dropping an object to be processed during transfer is formed between the provided char flip plates (see, for example, Patent Document 1).

JP-A-2005-198662 (paragraphs "0022", "0023", see FIGS. 7 and 10)

In the conventional structure described above, the char flip plates formed of plate-shaped members are arranged side by side at a predetermined interval in the front-rear direction of the transfer direction. Each of the side-by-side char flip plates is bent and formed to have an L-shaped cross section, and is formed in a direction that intersects with the downflow guide surface along the up-down direction and below the downflow guide surface. A degree adjustment surface is provided. The cha-flip plate configured in this way changes the width of the sorting drop passages existing between the cha-flip plates by changing the inclination angle of the flow-down guide surface, thereby sorting according to the amount of the object to be processed. It is useful in that it can be processed.

This structure has the following problems when selecting beans such as soybeans as the object to be processed.
In other words, when the object to be treated is soybean, the contact degree between soybean crop grains or between the crop grains and the chaflip board is reduced as much as possible when passing through the sorting drop passage to reduce the contamination of the crop grains. Is desired. However, if the sorting drop passage is too wide, the sorting accuracy decreases, and if the sorting drop passage is narrowed, the time until leakage increases, and the degree of contact between crop grains or between crop grains and a chaflip plate becomes stronger. Tend.
In particular, in the chaf flip plate, there is an opening adjustment surface projecting in a direction intersecting with the downflow guide surface under the downflow guide surface, and a drop is performed in a sorting drop passage above the opening adjustment surface. There is a tendency for many objects to be treated to stay on the way, and there is room for improvement in this respect.
When a large number of objects to be treated accumulate in the sorting drop passage above the opening adjustment surface and a large number of crop grains accumulate in the sorting drop passage, the contact pressure between the crop grains increases and Since the degree of contact with the flip plate becomes stronger and the crop grains are more likely to become dirty, it is desirable to avoid contact with the crop grains as much as possible in the sorting drop passage above the opening adjustment surface.

In the present invention, the structure of the chaff sheave is devised so as to obtain a threshing device having a structure in which it is easy to avoid soiling of crop grains when passing through the sorting drop passage while avoiding reduction of sorting accuracy in the sorting drop passage. It is a thing.

A feature of the threshing device according to the present invention is that a large number of chaflip plates whose longitudinal direction extends along a direction intersecting with a transfer direction of an object to be processed are provided with chaff sheaves arranged in front and rear of the transfer direction. A sorting/falling path for sorting and dropping an object to be processed during transfer is formed between the provided chaflip plates, and the chaflip plate is sorted between the front and rear charflip plates. A flow-down guide surface for guiding the movement of the processed object in the falling direction, and an opening adjustment surface protruding into the sorting drop passage in a direction intersecting the flow-down guide surface, the opening adjustment surface, Notch portions are formed at a plurality of positions in the longitudinal direction of the chaf flip plate so that a wide portion and a narrow portion of the sorting and dropping passage are formed depending on the size of the projecting area into the sorting and dropping passage. The chaf flip plate includes a plate-shaped lip body having the flow-down guide surface, and a plurality of locking bodies arranged in parallel in the longitudinal direction of the lip body at intervals. The main body is provided such that the lower flow guide surface has an inclined posture with the lower side in the transfer direction being a higher position, the opening adjusting surface is formed by the locking body, and the opening is adjusted between the locking bodies. A notch portion is formed, the locking body is provided at a lower end portion of the lip body in a state of being located under the lip body, and projects downward from the lower end portion, and the lip body is provided. With respect to the upper side in the transfer direction, a reinforcing rib formed in the lower end portion of the lip body along the longitudinal direction of the lip body and across the left and right of the lip body. The reinforcing rib is provided at a point protruding toward the lower side in the transfer direction with respect to the lip body.

According to the present invention, since there is a notch portion on the opening adjustment surface projecting in the sorting drop passage, while maintaining the sorting accuracy in the sorting drop passage, avoiding the retention of crop grains when passing through the sorting drop passage. be able to.
Therefore, there is an advantage that it is easy to avoid soiling of crop grains without lowering the sorting accuracy.
As in this configuration, the opening adjustment surface is formed by a plurality of locking bodies that are arranged side by side in the longitudinal direction of the lip body and are spaced in parallel, so that the large notch portion can be easily structured.
According to the present invention, the shape retention strength of the lip body can be improved by using the reinforcing rib.
According to the present invention, since the protruding direction of the reinforcing rib is opposite to the protruding direction of the locking body, the reinforcing rib also reduces the width of the selection drop passage even by a small amount. It is also possible to reduce the projecting length of the locking body that projects into the same passage as the sorting and dropping passage and to reduce the size.
ADVANTAGE OF THE INVENTION According to this invention, the crop grain which slides down the downflow guide surface leaks while returning to the upper side in the transfer direction, and the sorting process in the lower stage can be received by the longest possible route.
In the present invention, it is preferable that the locking body is provided in a front-up posture in which the upper hand side in the transfer direction is a higher rank.
In the present invention, it is preferable that the locking body is formed below the reinforcing rib.
According to the present invention, the reinforcing rib can be effectively used as a mounting surface of the locking body, and the structure can be simplified.

In the present invention, on the opening adjustment surface, it is preferable that the sum of the widths of the cutout portions in the longitudinal direction is larger than the sum of the widths of the portions in which the cutout portions do not exist in the longitudinal direction. is there.

The provision of this configuration can further improve the aperture ratio on the aperture adjustment surface.

In the present invention, it is preferable that the locking body is formed of a rod-shaped member that projects toward the sorting drop passage.

According to the present invention, the locking body can be configured with a simple structure.

In the present invention, it is preferable that the locking body is formed so as to intersect with the flow-down guide surface and have a posture in which the upper side in the transfer direction is a higher position.

According to the present invention, since the locking body is formed to project in a posture in which the upper side in the transfer direction is in a higher position, the locking body has a smaller area than that in the case where the locking body projects downward. Even with the stopper, it is easy to effectively exert the sorting effect on the objects to be treated.
In the present invention, it is preferable that the lip body and the reinforcing rib are configured by a plate-shaped member formed in an L shape when viewed in the longitudinal direction of the lip body.

It is a left side view of the normal type combine which applied the threshing device of the present invention. It is a sectional view in the up-and-down direction along the handling cylinder axis direction of the threshing device. It is sectional drawing in the up-down direction orthogonal to the handling cylinder axis direction of a threshing apparatus. It is a perspective view which shows a receiving net. It is a perspective view which shows the surface on the opposite side to the side which opposes a handling cylinder among receiving nets. It is a side view which shows a receiving net. FIG. 7 is a sectional view taken along line VII-VII in FIG. 6. It is the VIII-VIII sectional view taken on the line in FIG. It is the IX-IX sectional view taken on the line in FIG. FIG. 5 is a vertical cross-sectional view in a side view showing a front portion of the sheave case. It is an up-down direction sectional view in a front view which shows a part of sheave case. It is a perspective view which shows a cha flip board. It is sectional drawing which shows a chaflip board. It is a rear view which shows a cha flip board. It is a perspective view which shows a Glensieve. It is sectional drawing which shows the cha flip board in another embodiment.

Hereinafter, an example of an embodiment of the present invention will be described based on the description of the drawings.
In addition, the front-rear direction and the left-right direction in the description of the present embodiment are described as follows unless otherwise specified. That is, the traveling direction on the forward side (see arrow F in FIG. 1) during work traveling of the traveling machine body 1 such as a normal combine to which the present invention is applied is “front”, and the traveling direction to the reverse side (arrow B in FIG. 1). (Refer to FIG. 3) is “rear”, and a direction corresponding to the right side (see arrow R in FIG. 3) based on the forward posture in the front-rear direction is “right”, and also a direction corresponding to left side (see arrow L in FIG. 3 ). ) Is "left".

〔overall structure〕
FIG. 1 is an overall side view of a normal combine harvester for harvesting beans. In this combine, the body frame 10 is mounted on a pair of left and right crawler traveling devices 11. A threshing device 2 for threshing crops and a crop collecting device 12 for storing and discharging crops are arranged in parallel on the left and right sides of the machine body frame 10, and an operating cabin 13 is mounted in front of the crop collecting device 12. The cutting and conveying device 14 is provided in front of the threshing device 2.
Further, an engine 15 for supplying power for driving the crawler traveling device 11, the cutting and conveying device 14, the threshing device 2, and the crop collecting device 12 is mounted in a state of being located under the operation cabin 13.

The harvesting and conveying device 14 arranged in front of the threshing device 2 is connected to a feeder 16 for transporting the harvested crop so as to be vertically swingable around a lateral fulcrum x1 on the rear end side. On the front end side of the feeder 16, a clipper-type cutting blade (not shown) is provided, and a cutting unit 17 for cutting a planted crop with a cutting width substantially corresponding to the machine body width and sending it to the feeder 16 is connected. ing.

The feeder 16 is internally provided with a scraping conveyor 16A, and is configured so that the object to be processed supplied from the reaper 17 can be conveyed along the bottom surface of the feeder 16 and supplied to the threshing device 2.
There are various kinds of crops to be treated, which are harvested with the ordinary combine harvester, such as rice, gall, millet, beans, sesame, and rapeseed. Here, soybeans are the crops to be treated. In the following, the whole soybean, which is the target crop, is referred to as an object to be treated in the process of undergoing any treatment with combine, and the soybean grain to be harvested among the objects to be treated is referred to as a crop grain, and the pods and leaves are discharged. It is called a thing.

The object to be processed that has been put into the threshing device 2 is subjected to threshing and sorting processing in the threshing device 2. Among the objects to be processed, the selected crop grains are sent to the crop collection device 12 and taken out from the unloader 12A of the crop collection device 12 to the outside. The sorted discharged material is shredded through the shredding device 18 provided at the rear end of the threshing device 2, and then dropped and discharged to the outside of the machine.

[Thrusher]
The threshing device 2 is configured as follows.
As shown in FIG. 2 and FIG. 3, the threshing device 2 is provided with a threshing unit 2A for threshing an object to be processed inside the threshing case 20, and a lower part inside the threshing case 20. In addition, a sorting unit 2B for sorting the processed objects after the threshing treatment is provided. The threshing unit 2A is provided with an axial-flow-type handling cylinder 3 having a rotation axis z1 along the front-rear direction of the traveling machine body 1, and the sorting unit 2B is located below the handling cylinder 3 and stores the object to be treated. A swing selecting device 5 that swings and transfers from the front to the rear is provided.

In this threshing device 2, the threshing processing direction in the threshing unit 2A and the sorting processing direction in the sorting unit 2B are both along the front-back direction of the traveling machine body 1, and the transfer direction of the object to be processed is the front side of the traveling machine body 1 On the side, the lower side is set to be the rear side of the traveling vehicle body 1.
The threshing case 20 includes a front support plate 21 that supports the handling barrel 3, a rear support plate 22, lateral side plates 23 located on both left and right sides, an upper cover 24 that constitutes a ceiling portion, and a bottom plate 25, and is a rectangle. It is shaped like a box.

The threshing portion 2A in the threshing case 20 is provided with handle tooth supports 30 in which a large number of bar members 30a are provided upright at a plurality of positions at predetermined intervals in the circumferential direction. 3 is provided. The handling cylinder 3 is supported so as to be rotatable around the rotation axis z1 in the front-rear direction and to rotate in the clockwise direction fR (see FIG. 3) in a front view. At the front end portion of the handling cylinder 3, a scraping feed portion 31 having a spiral blade 31a is continuously provided.

On the lower side of the handling cylinder 3, a circular arc-shaped receiving net 4 is provided which is convex downward in the front-back view. The receiving net 4 divides the space inside the threshing case 20 into upper and lower parts. That is, the space above the receiving net 4 forms a handling chamber in which the handling barrel 3 is installed, and the handling barrel 3 and the receiving net 4 arranged in this space constitute the threshing portion 2A. There is.
Further, the space below the receiving net forms a sorting chamber in which the swing sorting device 5 and the like are installed, and the swing sorting device 5 and the wind sorting device 6 and the like arranged in this space are used as sorting portions. It constitutes 2B.

In the threshing unit 2A, the whole of the harvested crop fed from the supply port 26 by the feeder 16 from the root to the tip is sent between the handling barrel 3 and the net 4 as the object to be threshed, and the threshing treatment is performed. The crop grains obtained by the above are leaked from the net 4 to the sorting section 2B, and the discharges such as the leaves and pods generated by the threshing process are discharged from the dust discharge port 27 to the shredding device 18.

In the sorting section 2B, a swing sorting device 5 is provided below the receiving net 4.
The oscillating sorting device 5 oscillates in the front-rear direction with vertical movement by the operation of the eccentric cam type drive mechanism 5A provided at the rear end. At the lower position on the front side of the oscillating sorting device 5, a Karako (soybean curd) 60 is provided as a blowing means of the wind sorting device 6. As shown in FIG. 2, the Karato 60 generates the sorting wind by the rotating blade that rotates leftward when viewed from the left side. The oscillating sorting device 5 receives the processed material that has leaked from the net 4 while swinging, transfers the received processed material as a processing object to be sorted to the lower side in the sorting processing direction, and sifts and sorts it. It is configured to perform wind power selection by the selection wind from 60.

The recovery section 5B is provided below the upper-side equivalent portion in the sorting processing direction of the swing sorting device 5, and the second recovery section 5C is provided below the lower-side equivalent portion in the sorting processing direction. ing. At the bottom of the first collecting section 5B and the bottom of the second collecting section 5C, screws for conveying crop grains are respectively installed. The first item that has flowed down to the bottom of the first recovery unit 5B is conveyed to the crop recovery device 12 via the lifting device 5D. The second product that has flowed down to the bottom of the second recovery unit 5C is fed through a second reduction device (not shown) and returned to the swing sorting device 5.

[Receiving network]
The receiving net 4 used in the threshing unit 2A will be described.
As shown in FIGS. 2 to 4, the receiving net 4 is bent downward so as to cover a range extending over substantially a half circumference on the lower side of the handling barrel 3 when viewed in the direction along the rotation axis z1 of the handling barrel 3. It is formed in an arc shape. When viewed in a direction orthogonal to the rotation axis center z1 of the handling cylinder 3, the handling cylinder 3 is formed in a straight line along the axial direction of the handling cylinder 3.

As shown in FIGS. 3 and 4, the receiving net 4 is a first receiving net 40a (unit receiving net 40a) that exists in a region corresponding to one side of the rotary cylinder center z1 of the handling cylinder 3 in the left-right direction. (Corresponding to the body 40) and a second net-receiving body 40b (corresponding to the unit net-receiving body 40) existing in a region corresponding to the other side with the rotation axis z1 as a boundary. The receiving net body 40a and the second receiving net body 40b are combined to cover the lower side of the handling cylinder 3.
As shown in FIG. 2, the receiving net 4 is located below the front half of the handling cylinder 3 in the axial direction and below the front half of the handling barrel 3 in the axial direction. It is configured in combination with the rear network unit 4R. Each of the front net-receiving portion 4F and the rear net-receiving portion 4R is divided into the first net-receiving member 40a and the second net-receiving member 40b as described above. Therefore, the net 4 used in the threshing unit 2A includes the first net 40a and the second net 40b in the front net 4F and the first net 40a and the second net 40R in the rear net 4R. The net receiving body 40b is composed of a combination of four unit net receiving bodies 40 in total.

Each of the unit net-receiving bodies 40 that form the net 4 is configured as follows.
That is, the unit netting body 40 corresponding to the netting 4 has, as its basic structure, a pair of arcuate frame members 41 positioned apart from each other in the axial direction of the handling barrel 3 and the arcuate frame members 41, 41 spanning the arcuate frame members 41, 41. And a rod-shaped crosspiece member 42.
Each of the pair of arc-shaped frame members 41, 41 is formed in an arc shape along the circumferential direction of the handling cylinder 3. Then, of the arc-shaped frame members 41, 41, each end portion in the circumferential direction bent and formed in an arc shape in one arc-shaped frame member 41 is arranged at each end portion in the circumferential direction in the other arc-shaped frame member 41. They are connected via a linear outer frame member 43.
The linear outer frame member 43 is composed of a metal plate formed in a straight line along the axial direction of the handling cylinder 3, and is welded and connected to an end portion of each arc-shaped frame member 41 in the circumferential direction to form a pair of arc-shaped members. Along with the frame member 41, an outer peripheral frame 40A of the rectangular unit net body 40 is formed.

Inside the outer peripheral frame 40A, which is formed in a rectangular shape by the arcuate frame member 41 and the linear outer frame member 43 as described above, a pair of arcuate frame members 41, 41 positioned apart from each other in the axial direction of the handling barrel 3 is provided. The rod-shaped crosspiece members 42 laid across each other are arranged along the circumferential direction of the arc-shaped frame member 41 with a gap of a predetermined distance d1. Each rod-shaped crosspiece member 42 is made of a metal round pipe material. The rod-shaped rail members 42 have a gap of the predetermined distance d1 from the rod-shaped rail member 42 at the position closest to the abutting end of the first receiving net body 40a and the second receiving net body 40b. It is arranged in the state.
As shown in FIG. 3, the first receiving net body 40a and the second receiving net body 40b are located in a region corresponding to one side with a vertical line y1 passing through the rotation axis center z1 of the handling cylinder 3 as a boundary. The net 40a is present, the second net 40b is present in the region corresponding to the other side, and the abutting end of the second net 40b is arranged directly below the vertical line y1. A connecting hole 43a is formed in each of the linear outer frame members 43 present at the ends where the first receiving net body 40a and the second receiving net body 40b are abutted, and the connecting bolt 44 is inserted into the connecting hole 43a. Are connected to each other (see FIGS. 3 and 4).

The predetermined distance d1 between the rod-shaped cross-members 42 forms a gap large enough to allow the crop grains after threshing to pass through the predetermined distance d1 and to suppress leakage of discharge larger than the crop grains as much as possible. Is set to do. Due to the relationship with the predetermined distance d1, as shown in FIGS. 3 and 7, the diameter d2 of the round pipe material forming the rod-shaped crosspiece member 42 is set to be at least half the predetermined distance d1. And smaller than the predetermined interval d1. Further, in addition to the fact that the rod-shaped rail member 42 is suitable for allowing the predetermined distance d1 to pass through the crop grains after threshing without stagnation, the rod-shaped rail member 42 itself is made of a round pipe material. The smooth flow of the crop grain in contact with the round pipe material makes it easy to avoid soiling of the crop grain.

The arc-shaped frame member 41 is provided with a circumferential plate portion 41A having an arc-shaped plate surface extending along the circumferential direction of the handling barrel 3, and along a radial direction of the handling barrel 3 and a direction orthogonal to the axial direction of the handling barrel 3. A radial plate portion 41B having a flat plate surface is combined with each other to form a shape having an L-shaped cross section.
The flat plate-shaped radial plate portion 41B has a plate surface along a direction orthogonal to the axial direction of the handling cylinder 3, and the inner peripheral edge 41Ba and the outer peripheral edge 41Bb of the plate surface are It is formed in an arc shape along the circumferential direction of the handling cylinder 3.
Then, as shown in FIGS. 8 and 9, the inner peripheral edge 41Ba of the radial plate portion 41B is welded and fixed to the outer peripheral surface of the circumferential plate portion 41A, and the outer peripheral surface of the circumferential plate portion 41A is rod-shaped. The beam member 42 is also welded and fixed.

At this time, of the plate surfaces of the radial plate portion 41B, the plate surface on the side facing the end of the rod-shaped crosspiece member 42 and the axial edge 42a of the rod-shaped crosspiece member 42 facing the plate surface. Between them, the rod-shaped crosspiece member 42 is welded and fixed to the outer peripheral surface of the circumferential plate portion 41A in a state in which a certain amount of gap d3 exists.
Thus, the gap d3 exists between the plate surface of the radial plate portion 41B and the axial end edge 42a of the rod-shaped rail member 42, so that the rod-shaped rail member is provided on the outer peripheral surface of the circumferential plate portion 41A. When welding and fixing 42, it is easy to secure the welding length of the rod member 42 to the outer peripheral surface of the circumferential plate portion 41A as long as possible. That is, the welding position of the rod-shaped rail member 42 to the outer peripheral surface of the circumferential plate 41A is not limited to the direction along the longitudinal direction of the rod-shaped rail member 42, but also the radial end 42a of the rod-shaped rail member 42 and the diameter thereof. By effectively utilizing the gap d3 with the direction plate portion 41B, it is possible to weld and fix the rod-shaped beam member 42 even in the direction along the axial edge 42a.
Since the gap d3 exists between the axial end edge 42a of the rod-shaped rail member 42 and the radial plate portion 41B as described above, the axial length of each rod-shaped rail member 42 is reduced. Even if there is some variation in processing accuracy, the gap d3 can be effectively used to absorb an error in the length and to assemble without any trouble.

The radial width d4 of the circumferential plate portion 41A in the radial direction of the handling cylinder 3 is formed to be approximately the same as the diameter d2 of the rod-shaped crosspiece member 42. Therefore, the distance L1 from the rotation axis center z1 of the handling cylinder 3 to the outer peripheral edge of the handling plate 3 in the state of being welded and fixed to the outer circumferential surface of the handling plate 3 is as follows. The distance L2 is approximately the same as the distance L2 from the center z1 to the outer peripheral surface of the rod-shaped bar member 42 on the side farther from the rotation axis center z1 of the handling cylinder 3.

Between the pair of arcuate frame members 41, 41 of the receiving net 4, there is a plate surface formed in an arc shape along the circumferential direction of the handling cylinder 3 and extending in a direction orthogonal to the axial direction of the handling cylinder 3. The middle crosspiece member 45 is provided.
As shown in FIGS. 3 to 7, the inner rail member 45 has inner and outer edges 45a and 45b of the inner rail member 45 which are located closer to the handling cylinder 3 and which are on the inner peripheral side. The rod-shaped crosspiece member 42 is connected so as to project toward the handle barrel 3 side.
Further, among the edges 45a and 45b of the middle rail member 45, the outer edge 45b located on the side farther from the barrel 3 in the radial direction of the barrel 3 is a round pipe member forming the rod-shaped rail member 42. It is provided in a state of protruding by a predetermined protrusion amount d5 from the outer peripheral surface on the side away from the handling cylinder 3. The protrusion amount d5 corresponds to the shortest distance between the outer peripheral edge 45b of the middle rail member 45 and the outer peripheral surface of the round pipe member, and the radius of the round pipe member forming the rod-shaped rail member 42. Is set to be equal to or smaller than.

[Oscillating sorter]
The swing sorting device 5 provided in the sorting unit 2B will be described.
As shown in FIG. 2, the swing selecting device 5 includes a sheave case 50. Although not shown, the front side of the sheave case 50 is slidably supported in the threshing case 20 in the front-rear direction. The rear part of the sheave case 50 is supported by a well-known eccentric cam type drive mechanism 5A using an eccentric wheel. Therefore, as the eccentric wheel of the drive mechanism 5A is rotationally driven, the rear portion of the sheave case 50 is oscillated in the front-rear direction with vertical movement.
By the operation of the rocking/sorting device 5, the object to be treated that has leaked through the receiving net 4 is sorted into the crop grain and the discharge while being subjected to the actions of the specific gravity sorting and the wind sorting. ..

The sheave case 50 includes a corrugated plate-shaped front Glen pan 51 on the upper side in the transfer direction of the processing object. The chaff sheave 52 for coarse sorting, which conveys the objects to be processed subsequent to the conveyance end of the front grain pan 51, is on the lower side in the transport direction of the objects to be treated than the front grain pan 51, and the starting end is the front grain pan. It is arranged in a state of being positioned lower than the sieving line 51a provided at the terminal end portion of 51.
The chaff sheave 52 is provided in a posture in which the conveying surface thereof is gently inclined rearward and upward so that it becomes slightly higher on the lower side in the transfer direction. The conveyance surface of the chaff sheave 52 sends the object to be processed, which is placed on the upper surface side of the plurality of chaf flip plates 55 forming the chaff sheave 52, to the lower side in the transfer direction along with the swing motion of the entire sheave case 50. And a virtual surface connecting the upper end edges of a large number of chaflip plates 55.

On the lower side of the chaff sheave 52, a corrugated plate-shaped relay pan 53 for receiving and feeding back an object to be processed leaking from the front part of the chaff sheave 52 is provided, and the rear end part of the relay Glen pan 53. After that, a Glen Sieve 54 for fine selection is provided.
As shown in FIG. 10, FIG. 11, and FIG. 15, the fine sieve 54 for fine selection is made of punching metal in which a large number of through holes 54a are formed. The through hole 54a formed in the Glen sieve 54 is not a general circular hole but a rectangular shape. The through hole 54a formed by the rectangular hole in this manner is advantageous in that it is easier to secure a large aperture ratio per unit area of the grain sheave 54, as compared with the case where it is formed by the circular hole.

The rear end portion of the Glensieve 54 is extended to an intermediate position in the transfer direction of the chaff sheave 52, and the crop grain that has passed through the Glensieve 54 flows down toward the collecting section 5B first, and the first collecting section 5B. It is collected by the crop collection device 12 from 5B through the lifting device 5D.
The object to be processed that has passed the rear end of the Glensieve 54 and the object to be processed that has leaked from the lower side of the intermediate position in the transfer direction of the chaff sheave 52 flow down toward the second collecting section 5C and are not shown in the figure. It is returned to the start end side of the swing selection device 5, that is, to the upper side of the front grain pan 51 through the number reducing device.
Since the object to be processed that has been conveyed to the end of the chaff sheave 52 without leaking from the chaff sheave 52 is the discharge that contains almost no crop grains, it is discharged from the dust outlet (not shown) at the rear of the fuselage to the lower rear of the fuselage. To be done.

The chaff sheave 52 mounted on the sheave case 50 is configured as follows.
As shown in FIGS. 10 and 11, the chaff sheave 52 includes a large number of chaflip plates 55 whose longitudinal direction extends in a direction intersecting with the transfer direction of the object to be processed, with a predetermined interval before and after the transfer direction. It is configured by arranging in parallel.
A sorting and dropping passage R1 for sorting and dropping the workpieces being transported is formed between the respective chaflip plates 55 arranged at a predetermined interval in the front and rear of the transport direction.
The wind that flows from the lower side to the upper side through the sorting and dropping passage R1 serves as sorting wind for subjecting the object to be processed that is present on the chaff sheave 52 to the wind sorting process. This sorting air is the air supplied from the wind sorting device 6 arranged in the front part of the sorting unit 2B, and has a wind sorting processing action of passing through the Glensieeve 54 and the chaff sheave 52 and blowing off a light workpiece. is there.

As shown in FIG. 11, each chaflip plate 55 is pivotally supported at its upper end on an upper horizontal support shaft 50C attached to a lateral side wall 50A of the sheave case 50 via a support arm 50B. Has been done.
The lower ends of the respective chaf flip plates 55 are connected to each other by a lower horizontal support shaft 50D and a connecting plate 50E connecting the lower horizontal support shafts 50D, and swing back and forth around the horizontal axis p1 of the upper horizontal support shaft 50C. It is movably pivoted. The connecting plate 50E that connects the lower horizontal support shafts 50D to each other is connected to an appropriate opening adjustment mechanism (not shown). By changing the position of the connecting plate 50E in the front-rear direction, the lower end of each chaflip plate 55 is connected. The side swings and the tilt angle changes. Along with the change of the inclination angle of the chaflip plate 55, the flow passage area of the selection drop passage R1 is changed to be wide or narrow.

As shown in FIGS. 12 to 14, each of the chaflip plates 55 is a downflow guide surface that guides the movement of the sorted object to be processed in the falling direction between the front and rear charflip plates 55, 55. 55A and an opening adjustment surface 55B projecting into the sorting drop passage R1 in a direction intersecting with the flow-down guide surface 55A.
Of these, the flow-down guide surface 55A is formed on a plate-shaped portion which is the lip body 56 of the chaflip plate 55, and the opening adjustment surface 55B is formed on the lower end portion of the lip body 56 of the lip body 56. It is composed of a plurality of locking bodies 57 arranged in parallel at intervals in the longitudinal direction.
In other words, with respect to the lower end surface of the lip body 56, a large number of locking bodies 57 formed of rod-shaped members are arranged with a predetermined interval in the longitudinal direction of the lip body 56, and the projecting end side faces the selection drop passage R1. It is welded and fixed so that it protrudes. Accordingly, the chaflip plate 55 is formed in an L shape in which the lip body 56 and the locking body 57 are substantially orthogonal to each other in a side view.

By arranging a large number of locking bodies 57 in the longitudinal direction of the lip body 56 in this manner with a predetermined gap, the opening adjustment surface 55B has the lip body 56B as shown by a phantom line in FIG. 12, for example. The area of the opening degree adjusting surface 55B can be greatly reduced as compared with the structure formed in the entire longitudinal direction of. The space existing between the locking bodies 57 corresponds to the cutout portion s1 formed in the opening adjustment surface 55B. The upper surface of the locking body 57 corresponds to a portion where the cutout portion s1 does not exist.
Therefore, the sum of the widths of the portions of the lip body 56 where the cutout portions s1 are present in the longitudinal direction is larger than the sum of the widths of the portions of the lip body 56 where the cutout portions s1 are not present. Has been done.

Thus, in the longitudinal direction of the lip body 56, the width of the portion where the cutout portion s1 exists is made larger than the width of the portion where the cutout portion s1 does not exist, and the area of the opening adjustment surface 55B is greatly reduced. As a result, the passing rate of the object to be processed in the sorting/falling passage R1 can be greatly increased.
If the distance between the front and rear lip bodies 56 is increased to increase the flow passage area of the selection drop passage R1, the object to be processed can easily pass through and the retention of crop grains can be avoided, but the specific gravity of the object to be processed is selected. The accuracy will be extremely reduced. On the contrary, if the distance between the front and rear lip bodies 56 is reduced to reduce the flow passage area of the sorting and dropping passage R1, it becomes difficult for the object to be processed to pass through and the specific gravity sorting accuracy is improved, but the crop grains are retained. become.
In the present embodiment, instead of changing the flow passage area of the sorting drop passage R1 by adjusting the distance between the front and rear lip bodies 56, the opening adjustment surface 55B has a notch portion s1. By forming a portion where the notch portion s1 does not exist, the sorting accuracy is improved and the crop grain is prevented from being soiled.
By adopting such a structure, the reduction of the specific gravity selection accuracy is suppressed in a portion where the cutout portion s1 does not exist, and the passage rate of the object to be treated is improved in the portion where the cutout portion s1 exists to improve the crop grain. We are trying to prevent stagnation.

Further, by providing the opening adjustment surface 55B with a portion where the cutout portion s1 is present, the air volume of the wind selection air in the selection drop passage R1 tends to increase, so that the opening adjustment surface 55B includes the cutout portion s1. Even if the area of the area is enlarged and the sorting accuracy in the specific gravity sorting tends to decrease, the sorting wind is sent in the direction opposite to the falling direction of the object to suppress the decline in the specific gravity sorting performance. It also has the effect of facilitating.

As shown in FIG. 13, the lower end portion of the lip main body 56 is bent in a rib shape toward the side opposite to the side where the locking body 57 is formed to project, and a reinforcing rib 58 along the longitudinal direction of the lip main body 56. Are formed to project. The reinforcing ribs 58 can improve the bending strength of the lip body 56, particularly in the direction intersecting the plate surface forming the flow-down guide surface 55A.
At the same time, the reinforcing rib 58 bent in a direction intersecting the plate surface of the lip body 56 has a plate of the lip body 56 at the lower end of the lip body 56 having an area much larger than the area of the lip body 56 due to the plate thickness. A surface can be formed in a direction intersecting the surface. By welding and fixing the locking body 57 on the lower side of this surface, a portion having a sufficient area as a mounting surface of the locking body 57 can be formed on the lower end side of the lip body 56.

The lip body 56 is formed in an inclined posture in which the flow-down guide surface 55A is inclined so that the lower side is higher in the transfer direction of the object to be processed. Therefore, the sorting and dropping passages R1 are formed at predetermined intervals between the lip bodies 56 that are lined up at predetermined intervals in the front-rear direction in the transport direction of the object to be processed.
The locking body 57 is welded and fixed to the lower surface of the reinforcing rib 58 bent in a direction intersecting with the plate surface of the lip body 56, and exists on the upstream side in the transfer direction in the direction intersecting with the flow-down guide surface 55A of the lip body 56. It is attached so as to project toward the inside of the sorting drop passage R1. While the flow-down guide surface 55A of the lip main body 56 is in a rearward and upward inclined posture in which the lower side of the flow-down guide surface 55A inclines so that the lower side of the lip main body 56 becomes higher, the locking body 57 allows the lip main body 56 to flow down. In a state of being substantially orthogonal to the guide surface 55A, it is arranged in a forwardly inclined posture that is inclined so that the upper side is higher in the transport direction of the object to be processed.

[Other Embodiment 1]
In the above-described embodiment, as a means for forming the opening adjustment surface 55B including the cutout portion s1, a structure using a plurality of locking bodies 57 arranged in parallel in the longitudinal direction of the lip body 56 at intervals is used. Although illustrated, it is not limited to this structure.
For example, at the lower end of the lip body 56, a plate-shaped member having a plate surface in the direction intersecting with the flow-down guide surface 55A is welded and fixed to form an opening adjustment surface 55B, and the plate-shaped member is provided with a cutout portion s1. Then, the opening adjustment surface 55B may be provided with the cutout portion s1. Alternatively, the lower end of the lip body 56 may be bent to form the opening adjustment surface 55B, and the opening adjustment surface 55B may be provided with the cutout portion s1.
Other configurations may be the same as those of the above-described embodiment.

[Other embodiment 2]
In the above-described embodiment, the flow-down guide surface 55A of the lip body 56 is formed in an inclined posture such that the lower side in the transfer direction is the upper side, and the locking body 57 intersects the flow-down guide surface 55A and the upper side in the transfer direction. An example is shown in which the structure is such that it projects upward to the sorting drop passage R1 existing on the upper side in the transfer direction with respect to the flow-down guide surface 55A of the lip main body 56 to which the locking body 57 is attached. It is not something that can be done.
For example, as shown in FIG. 16, the locking body 57 has a structure in which it protrudes into the sorting drop passage R1 existing on the lower side in the transfer direction than the flow-down guide surface 55A of the lip body 56 to which the locking body 57 is attached. It may be one.
Other configurations may be the same as those of the above-described embodiment.

[Other Embodiment 3]
In the above-described embodiment, the structure in which the lower end portion of the lip main body 56 is provided with the reinforcing rib 58 that is bent and formed so as to project in the direction opposite to the projecting direction of the locking body 57 is illustrated. It is not limited to.
For example, although not shown, the reinforcing rib 58 and the locking body 57 may be formed so as to project in the same direction. In this case, the reinforcing rib 58 and the locking body 57 may be formed as an integral plate-shaped body (not shown), but they serve as the locking body 57 rather than the portion functioning as the reinforcing rib 58. The protruding length of the part needs to be large. Further, the reinforcing rib 58 may be omitted.
Other configurations may be the same as those of the above-described embodiment.

[Fourth Embodiment]
In the above-described embodiment, the rod-shaped crosspiece member 42 constituting the receiving net 4 has a structure in which a round pipe is used, but the round pipe is not necessarily limited to one having a perfect circular cross section. Absent. For example, it may be formed of an elliptical shape such as an ellipse, or a semicircular shape having a peripheral surface that is bent upward. Further, it is not limited to the round pipe, and may be configured by a solid round bar member.
In this case, it is desirable that the major axis direction of the cross-section circle be along the radial direction of the handling cylinder 3. In the case of a semi-circular shape, the top of the arcuate peripheral surface that bends upward is the handling cylinder 3. It is preferably in the radial direction.
Other configurations may be the same as those of the above-described embodiment.

The present invention is not limited to soybeans to be treated, but may be applied to combine harvesters such as rice, gall, millet, beans, sesame, and rapeseed.

52 chaff sheave 55 chaf flip plate 55A downflow guide surface 55B opening adjustment surface 56 lip body 57 locking body 58 reinforcement rib R1 sorting drop passage s1 notch

Claims (7)

A large number of chaflip plates along the longitudinal direction in a direction intersecting the transfer direction of the object to be processed are provided with chaff sheaves arranged side by side in the front and rear of the transfer direction,
A sorting/falling passage for sorting and dropping the objects to be processed during transfer is formed between the char flip plates arranged in parallel,
The chaflip plate has a downflow guide surface that guides the movement of the sorted object to be dropped between the front and back chaflip plates, and the sorting drop passage in a direction intersecting the downflow guide surface. With an opening adjustment surface protruding inside,
A plurality of the opening degree adjusting surfaces in the longitudinal direction of the chaflip plate are formed so as to form a wide portion and a narrow portion of the sorting and dropping passage depending on the size of the projecting area into the sorting and dropping passage. A notch is formed at the location,
The chaflip plate includes a plate-shaped lip body having the flow-down guide surface, and a plurality of locking bodies arranged in parallel in the longitudinal direction of the lip body at intervals.
The lip body is provided such that the lower flow side of the flow-down guide surface is in a tilted posture with the lower side being higher.
The opening adjustment surface is formed by the locking body, the notch portion is formed between the locking bodies,
The locking body is provided at a lower end portion of the lip body in a state of being located under the lip body, projects downward from the lower end portion, and is arranged in the transfer direction with respect to the lip body. Protruding towards the right side,
The lower end portion of the lip body is provided with a reinforcing rib formed in a state along the longitudinal direction of the lip body and across the left and right sides of the lip body ,
The threshing device in which the reinforcing rib projects toward the lower side in the transfer direction with respect to the lip body. The threshing device according to claim 1, wherein the locking body is provided in a front-up posture in which the upper side in the transfer direction is higher. The threshing device according to claim 1 or 2, wherein the locking body is formed below the reinforcing ribs. The threshing device according to any one of claims 1 to 3, wherein the locking body is formed of a rod-shaped member that projects toward the sorting drop passage. The sum of widths of the cutout portions in the longitudinal direction on the opening adjustment surface is larger than the sum of widths of portions where the cutout portions do not exist in the longitudinal direction. The threshing device according to one item. The threshing device according to any one of claims 1 to 5, wherein the locking body is projectingly formed so as to intersect with the flow-down guide surface and the upper side in the transfer direction is a higher position. 7. The lip body and the reinforcing rib are configured by a plate-shaped member formed in an L shape when viewed in a direction along the longitudinal direction of the lip body. The threshing device described.

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