JP5400566B2 - Chaff sheave structure in threshing equipment - Google Patents

Description

  The present invention relates to a chaff sheave structure in a threshing apparatus mounted on a combine or a harvester.

  Conventionally, as shown in Patent Literature 1, a sheave case provided with a chaff sheave that sorts a threshing product that has fallen from a receiving net in a sorting portion located below a handling room of a threshing device can swing back and forth. In addition to providing a chaff sheave, a plurality of sorting plates are arranged in parallel at the front and rear at a predetermined pitch, a plurality of sorting plates are supported swingably around a horizontal axis, and a long support frame is provided across the plurality of sorting plates. A configuration is known in which the opening of the chaff sheave is set by changing the angles of a plurality of sorting plates in conjunction with the back and forth movement of the support frame.

  As shown in FIG. 2 and FIG. 3 of Patent Document 1, a lower end of the sorting plate is provided with a bent portion directed forward at a substantially right angle to the sorting surface. The sorting surface and the back surface of the sorting plate are formed flat.

JP 2000-262138 A

  If the sorting plate on the sorting surface is flat, when the chaff sheave is fully open or nearly fully open (the sorting plate is in a standing state), the sorting processed material that falls along the sorting surface falls to the bent portion, where For the first time, the sorted product is oscillated and sorted by the oscillation of the chaff sheave. However, even if the categorized product is oscillated from this position, it may be difficult to perform sufficient wind sorting.

  Therefore, as shown in the reference example of FIG. 11, it is conceivable to form a bulging portion that bulges upward with respect to the plate surface of the sorting plate across the width in the width direction in the upper and lower intermediate portions of the sorting plate. If it does in this way, the sorting processed material which has fallen on the sorting board will be suppressed by the upper bulging part first, and it will become easy to perform rocking sort.

  However, both the ones in Patent Document 1 and the example shown in the reference example of FIG. 11 are adjacent to the chaff sheave because the thickness in the direction perpendicular to the sorting surface of the sorting plate including the lower bent portion and the intermediate bulging portion is thin. When the screen is set in a closed state in which a predetermined minimum gap is provided between the front sorting plate and the lower bent portion of the rear sorting plate, the sorting surfaces of the sorting plates are as shown in FIG. It is greatly lying down and becomes almost horizontal. When the sorting surface of the sorting plate approaches horizontal, if the sorted product is likely to get wet, the sorted product is less likely to fall, and a sorting failure is likely to occur.

  An object of the present invention is to provide a chaff sheave structure of a threshing device that can be well selected even in a fully closed state in which the chaff sheave is set at a minimum interval.

[Configuration of the first invention]
1st invention provides the sheave case provided with the chaff sheave which sorts the threshing processed material which fell from the receiving net in the sorting part located under the handling room of a threshing device so that rocking back and forth is possible, Are arranged in parallel at the front and rear at a predetermined pitch, the plurality of sorting plates are swingably supported around a horizontal axis, and a long support frame is connected to the front and rear across the plurality of sorting plates. In the chaff sheave structure in the threshing device configured to change the angle of the plurality of sorting plates in conjunction with the back and forth movement of the frame and to set the opening of the chaff sheave,
In the lower part of the flat plate material , the sorting plate is formed with a bent portion that bends upward with respect to the plate surface of the sorting plate, and at the upper and lower intermediate portions of the plate material over the entire width in the width direction or in the width direction. constructed by forming a bulging portion which bulges downward side stepwise with respect to the plate surface of the plate member Te,
On the upper end portion of the bent portion of the sorting plate, a bent portion different from the bent portion bent forward with respect to the bent portion is formed,
When the chaff sheave is set in a fully closed state in which the interval between the adjacent sorting plates is the minimum interval, the back surface of the bulging portion is opposed to the upper edge of the bent portion of the sorting plate adjacent to the rear thereof. A predetermined gap that is the minimum gap is formed between the back surface of the bulging portion on the front side and the bent portion on the rear side,
When the chaff sheave is set in the fully closed state, the other bent portion of the rear sorting plate in the side view is in the direction parallel to the plate surface in the side view, the bulge of the front sorting plate. It is located within the range where the part was formed .

[Operation of the first invention]
According to the first aspect of the present invention, when the chaff sheave is in the open state, the gap between the rear surface of the bulging portion of the adjacent front sorting plate through which the sorting processed product passes and the front position of the rear sorting plate is relatively wide. In addition, when the chaff sheave is in the open state, the sorting plate rises relatively steeply, so that the sorted product is easily passed between the adjacent sorting plates.

  That is, according to the first invention, since the bulging portion is bulged rearward with respect to the sorting surface formed on the front surface of the sorting plate, the amount of the sorting plate bulging the bulging portion rearward. Only the thickness in the direction perpendicular to the sorting surface of the sorting plate can be increased, so that the chaff sheave has a bent portion at the back side of the sorting plate on the front side and the lower side of the sorting plate on the rear side of the adjacent sorting plates. Even if it sets to the fully-closed state from which the clearance gap between them becomes a predetermined minimum space | interval, the selection surface of a selection plate will not fall down greatly.

[Effect of the first invention]
According to the first aspect of the present invention, the fully closed state of the chaff sheave can appear with a relatively large inclination angle of the sorting surface of the sorting plate, so that the sorted product can be satisfactorily dropped even if the sorted product is somewhat wet. Thus, a good sorting process can be performed in the open / closed state of the entire chaff sheave.

[Effects of the first invention]
According to the first aspect of the present invention, it is possible to give a drop resistance to the sorting processed product in two stages of the bulging portion and the bent portion, and the bulging portion of the front sorting plate and the folding portion of the sorting plate adjacent to the rear side. Are opposed to each other, and when the chaff sheave is fully closed, the swelled portion of the front sorting plate and the bent portion of the rear sorting plate give fall resistance to the sorting object, and both cooperate Therefore, it is possible to perform the selection with the chaff sheave fully closed.

In addition, when the chaff sheave is fully closed, the bent portion and the bulging portion of the sorting plate can increase the thickness in the direction perpendicular to the sorting surface of the sorting plate, and the bulging of the sorting plate on the front side The minimum gap between the back of the part and the bent part of the rear sorting plate can be set reliably, so that the tilt angle of the sorting surface of the sorting plate can be kept relatively large when the chaff sheave is fully closed. it can. Therefore, even if the sorted product is slightly wet, the sorted product can be dropped well, and a good sorting process can be performed in the open / closed state of the entire range of the chaff sheave.
According to a second aspect of the present invention, in the configuration of the first aspect, the bottom portion of the bulging portion is formed flat.
According to a third invention, in the configuration of the second invention, when the chaff sheave is set in the fully closed state, the bottom portion of the bulging portion in the front sorting plate and the other folding in the rear sorting plate The part is substantially parallel.

It is a schematic longitudinal side view of a threshing apparatus. It is a partial front view of a threshing apparatus. It is a partial vertical side view of the front of the handling room. It is an expanded view of a receiving network. It is a partially broken side view which shows the open state of a chaff sheave. It is a partially broken side view which shows the fully closed state of a chaff sheave. It is a partially longitudinal front view which shows the left half part of the sorting plate of a chaff sheave, the operation member, and the left side wall of the threshing apparatus. It is a partially longitudinal front view which shows the left half part of the sorting plate of a chaff sheave. It is an assembly drawing of a chaff sheave and an operation tool. (A) is a partially longitudinal side view showing the open state of the chaff sheave, (b) is a partially longitudinal side view showing the fully closed state of the chaff sheave. (A) is a partially longitudinal side view showing the open state of the chaff sheave of the reference example, and (b) is a partially longitudinal side view showing the fully closed state of the chaff sheave of the reference example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal side view of a threshing apparatus 1 mounted on a combine, FIG. 2 is a partial front view of the threshing apparatus, and FIG. 3 is a partial longitudinal side view of the front of the handling room. In the threshing apparatus 1, the threshing unit 2, the sorting unit 3, and the collecting unit 4 are arranged in an upper part, an intermediate part, and a lower part, respectively.

The threshing section 2 includes a handling cylinder 7 supported in a handling chamber 5 so as to be rotatable integrally with a support shaft 6 in a front-rear orientation, and a receiving net 8 disposed along the lower side of the handling cylinder 7. The holding chamber 5 is provided with a holding and conveying mechanism 11 including a feed chain 9 and a holding rail 10 on the side surface of the handling chamber 5.
The sorting unit 3 includes an oscillating sorting device 12 and a red pepper 13 that sends sorting wind to the oscillating sorting device 12. The oscillating sorting device 12 corrugates the processed material leaked from the receiving net 8 at the front position. The grain pan 14 is received by the grain pan 14 and is coarsely sorted by the chaff sheave 15 while being moved backward by swinging. Then, only the grain is sorted by the grain sheave 16 and leaked. Is to be sent out of the threshing device.
The recovery unit 4 is a first screw 18 that recovers the grain selected by the grain sieve 16 of the swing sorter 12 and the second screw that is discharged from the rear end of the grain sieve 16 or leaked from the Strollac 17. And a second screw 19 that collects the product, and the grain collected by the first screw 18 is sent to a grain storage section (not shown), and the straw and branches collected by the second screw 19 The processed product such as the attached grain is returned to the front portion of the swing sorting device 12 by the reduction device 20. In addition, the rear part of the threshing apparatus 1 is provided with a dust exhaust fan 21 that sucks and discharges dust in the apparatus.

  As shown in FIGS. 1 and 2, the handling chamber 5 has a front wall 22 that is a wall on the side of the grain supply port 26, a rear wall 23 that is a wall on the side of the dust feed port 27, and a wall on the side of the handling port 28. The left side wall 24 and the ceiling wall 25 arranged at positions covering the upper portions of the left side wall 24 and the support shaft 6 of the handling cylinder 7 are installed on the front wall 22 and the rear wall 23, A cereal supply port 26 is formed on the wall 22, a dust supply port 27 is formed on the rear wall 23, and a handling port 28 connected to the cereal supply port 26 and the dust supply port 27 is formed on the left side wall 24. ing. Of the left side wall 24, the upper left side wall portion including the portion near the upper portion of the handle 28 is referred to as the upper lip plate 24a, and the lower portion including the portion near the lower portion of the handle port 28 is referred to as the lower lip plate 24b. The holding rail 10 is supported on the outer surface of the upper lip plate 24a, and the feed chain 9 is supported on the outer wall of the lower lip plate 24b.

A front cover 29 of the threshing apparatus 1 is provided in front of the front wall 22 shown in FIGS. A driving pulley 30 is disposed on the support shaft 6 of the handling cylinder 7 located in front of the front wall 22, and the driving pulley 30 is covered with a front cover 29.
A rubber hump 31 is pressed against the front cover 29 by a hump holding plate 32 and is fixedly hung by screws 33. The upper portion of the front cover 29 is detachably connected to a cover support plate 36 connected to the front wall 22 via pins 35 fixed to the cover mounting bracket 34 and the like.

  As shown in FIG. 3, the front cover 29 includes a first bent cover portion 29a, a second bent cover portion 29b, and a third bent cover portion 29c that are horizontally arranged in a lower part of the fixed portion of the hump 31. Is formed. When the harvested cereals that have been nipped and conveyed by the feed chain 9 are conveyed to the cereal supply port 26, the hump 31 is applied to the first to third folded cover portions 29a, 29b, and 29c as shown by the two-dot chain line. Although it bends along, the bending angle by the 1st-3rd bending cover part 29a, 29b, 29c which adjoins can be made small by increasing the number of steps of bending, and the damage by the bending of the hump 31 is suppressed. it can.

  A processing rotator 37 is provided behind the dust feeding port 27 so as to be freely rotatable. The processing rotating body 37 causes the claw 37a to act on the threshing waste straw discharged from the handling chamber 5, and scrapes the grains that have been put into the threshing waste straw.

  Behind the handling chamber 2, there are provided a waste straw conveying device 38 for conveying the threshed waste straw obliquely rearward and a waste straw processing device 39 for treating the waste straw conveyed by the waste straw conveying device 38. The waste straw conveying device 38 inherits the threshing waste straw from the feed chain 9, and the rearing side of the threshing machine body while bringing the inherited threshing waste straw sideways to the side wall side opposite to the feed chain 9 of the threshing machine body. To the outside of the threshing machine body from the outlet wall outlet 40 located at the rear of the threshing machine body, and dropped onto the cutter case 41 of the waste wall processing apparatus 39.

  The waste straw processing device 39 is driven inside a cutter case 41, a waste straw receiving port 42 provided in the upper part of the cutter case 41, a swingable lid plate 43 that opens and closes the waste straw receiving port 42, and a cutter case 41. And a pair of rotary cutters 44, 44.

  That is, when the lid plate 43 is lifted and opened, the waste straw processing device 39 drops the threshing waste straw that has fallen from the waste straw transporting device 38 into the cutter case 41 from the waste straw receiving port 42, and the cutter case The threshing drainer that has entered 41 is shredded in a slimming direction by a pair of rotating cutters 44, 44, and the shredded straw is dropped from the lower part of the cutter case 41 to the rear of the threshing machine body 1. When the lid plate 43 is closed, the threshing waste straw dropped from the waste straw transporting device 38 is dropped onto the lid plate 43 and dropped from the lid plate 43 to the rear of the cutter case 41 while remaining as a long straw.

  FIG. 4 is a development view of the receiving network 8. As shown in FIGS. 1, 3, and 4, the receiving net 8 is divided into two divided receiving nets 8 a that are supported by supporting rails 45 provided on the front end side and the rear end side of the handling chamber 5 side by side in the circumferential direction of the handling cylinder. , 8a. The front area F of the receiving network 8 is constituted by the front portions 8af of the two divided receiving networks 8a and 8a. The rear region R on the rear side of the front region F of the receiving network 8 is configured by two rear receiving portions 8ar of the divided receiving networks 8a and 8a.

  Each of the divided receiving nets 8a includes a plurality of horizontal rails 46 arranged in the front-rear direction of the receiving net 8 (in the direction of the barrel rotation axis) and a plurality of lines arranged in the horizontal direction of the receiving net 8 (in the circumferential direction of the cylinder). And a frame 48 facing the front and rear of the receiving net 8 located at both lateral ends of the divided receiving net 8a. Each crosspiece 46 is an arc-shaped strip along the circumferential surface of the barrel, and each wire 47 is made of a round bar.

  The arrangement pitch in the horizontal direction of the wire 47 of each of the divided receiving nets 8a is the same arrangement pitch. As for the arrangement pitch in the front-rear direction of the horizontal rails 46 of each divided receiving network 8a, the front area F is set to a wider arrangement pitch than the rear area R, as will be described below.

  As shown in FIG. 4, each divided receiving network 8 a has a first arrangement pitch P <b> 1, a second arrangement pitch P <b> 2, a third arrangement pitch P <b> 3, a fourth arrangement pitch as the arrangement pitch of the adjacent horizontal rails 46 in the front region F. The arrangement pitch P4, the fifth arrangement pitch P5, and the sixth arrangement pitch P6 are provided, and the seventh arrangement pitch P7 is provided as the arrangement pitch of the adjacent horizontal rails 46 in the rear region R. The length relationship between the first to seventh arrangement pitches P1, P2, P3, P4, P5, P6, and P7 is “first arrangement pitch P1 <seventh arrangement pitch P7 <sixth arrangement pitch P6 <fifth arrangement pitch P5. <4th arrangement pitch P4 <2nd arrangement pitch P2 <3rd arrangement pitch P3. That is, except for the first arrangement pitch P1 of the front area F, the second to sixth arrangement pitches P2 to P6 of the front area F are formed wider than the seventh arrangement pitch P7 of the rear area R. The meshes 50 arranged in the five rows of the second to sixth arrangement pitches P2 to P6 other than the meshes 49 of the two first arrangement pitches P1 on the front end side of the region F are more than the meshes 51 located in the rear region R. It is a large scale with a large area.

  That is, the receiving net 8 has excellent net receiving strength in the front area F due to the small arrangement pitch of the cross rails 46 due to the small meshes 49 in the front area F, and the amount of granulation is large in the front area F. A certain cereal is threshed, and the threshing grain is quickly dropped from the receiving net 8 to the selection unit 3 by the large scale 51, and the cereal in a state where the amount of granulation is reduced in the rear region R is threshed before The threshing grains are dropped from the receiving net 8 to the sorting unit 3 while making it difficult for the dust to fall from the receiving net 8 by the scale 51 having a smaller area than the large scale 50 of the region F.

  As shown in FIGS. 5 to 9, in the swing sorting device 12, the chaff sheave 15 is attached to the left and right side plates 52 a of the sheave case 52. The structure for adjusting the opening of the chaff sheave 15 is configured as follows. The chaff sheave 15 is provided substantially horizontally in the front-rear direction, and a large number of sorting plates 53 are arranged in parallel in the front-rear direction at a predetermined interval.

  The sorting plate 53 includes a central sorting plate 53A connected to the operation tool 58, and other sorting plates 53B before and after this. The central sorting plate 53A includes a plate material 53b formed with a bent portion 53a that also serves as a reinforcement for receiving the sorting processed product flowing down to the lower end portion, a support shaft 57 made of a round bar fixed to the upper end portion of the plate material 53b, On the left and right of the lower end of the plate 53b, there are an operation shaft 55 that also serves as a support shaft that can be inserted and removed, and a holding plate 53c that is disposed on the left and right of the plate 53b, fixes the support shaft 57, and holds the operation shaft 55. It is comprised by the reinforcement board 53j fixed to the edge part on either side. A holding link 53h is provided across the operation shaft 55 and the support shaft 57 at the left and right outer positions of the reinforcing plate 53j.

  The front and rear sorting plates 53B are formed of a plate material 53b formed with a bent portion 53a that also serves as a reinforcement for receiving the sorting processed product flowing down to the lower end portion, and U-shaped round bars arranged at the left and right ends of the plate material 53b. The upper support shaft 57a, the lower support shaft 55a, and a holding plate 53g for holding the support shaft 57a are provided. The support shafts 55a and 57a are fixed between the plate material 53b and the holding plate 53g. The upper edge of the sorting plate 53B is formed in a waveform over substantially the entire width, and the upper and lower intermediate parts extend downward (rear) side with respect to the plate surface of the plate material 53b of the sorting plate 53B over the entire width in the width direction. A bulging portion 53d for bulging reinforcement is formed. The upper surface of the bent portion 53a and the lower end inner surface 53e of the bulging portion 53d in which the front surface of the plate material 53b is recessed receive the sorted processed product once when the sorted processed product flows down the sorting plate 53B, and the oscillating wind Since the light pods and foliage are subjected to wind sorting upon selection, they have a function as a reinforcing material and a function to improve the sorting accuracy.

  With respect to the central sorting plate 53A, the support shaft 57 is inserted into a hole formed in the chaff sheave mounting frame 69, and the operation shaft 55 is inserted into the holes of the holding link 53h and the support frame 54, whereby the sorting plate 53A and the holding link are inserted. 53h, the support frame 54, the chaff sheave mounting frame 69, and the like are assembled. With respect to the front and rear sorting plates 53B, each support shaft 57a is inserted into a hole formed in the chaff sheave mounting frame 69, and a split pin 70 is fixed to the support shaft 57a to prevent the chaff sheave mounting frame 69 from coming off. By inserting the shaft 55a into the hole of the support frame 54 and fixing the split pin 71 to the support shaft 55a to prevent the support frame 54 from coming off, the sorting plate 53B, the support frame 54, the chaff sheave mounting frame 69, etc. Assembled.

  As shown in FIGS. 7 to 9, holes 72 are formed in a plurality of locations of the chaff sheave mounting frame 69, and nuts 73 are fixed around the holes 72 inside the chaff sheave mounting frame 69. With the chaff sheave 15 positioned between the left and right side plates 52 a, 52 a, the bolt 75 is threaded through the hole 74 formed in the side plate 52 a of the sheave case 52 and screwed into the nut 73 to fix the chaff sheave 15 to the sheave case 52. .

  The sorting plates 53A and 53B attached to the sheave case 52 change the angles of the plurality of sorting plates 53A and 53B in conjunction with the movement of the support frame 54 forward or backward. . That is, when the support frame 54 is moved forward, the angles of the respective sorting plates 53A and 53B are loosened and the opening of the chaff sheave 15 is reduced. Conversely, when the support frame 54 is moved rearward, the respective sorting plates 53A and 53B. The plate surface becomes a steep downward angle and the opening of the chaff sheave 15 is increased.

  The central sorting plate 53A is linked to an operation tool 58 that changes the opening degree of the chaff sheave 15. That is, as shown in FIG. 9, an operation shaft 55 that also serves as a support shaft is fixed to the operation tool 58. The operation shaft 55 passes through a circular arc-shaped long hole 56 formed in the left side plate 52a of the sheave case 52, and is separated from the hole of the support frame 54, the hole of the holding link 53h, and the hole of the reinforcing plate 53j. 53c) is inserted through a hole 53f formed in the lower part. The support shaft 57 at the upper end of the central sorting plate 53A is only supported by the chaff sheave mounting frame 69, and the support shaft 57 is not attached to the operation tool 58, and is concentric with the hole 76 of the left side plate 52a. And is supported by the left side plate 52a. That is, a hole 76 is formed in the left side plate 52a of the sheave case 52, and as shown in FIG. 7 and FIG. 9, the shaft center is located around the hole 76 inside the left side plate 52a. Axis 77) A nut 77 is fixed in a state where it coincides with or substantially coincides with a. A distance equal to or substantially equal to the distance between the axis c of the operation shaft 55 and the axis a of the support shaft 57 in a state where the operation shaft 55 is inserted into the hole 53f is spaced upward from the axis c of the operation shaft 55. A hole 78 is drilled at the upper position of the operating tool 58, a hooked ring 79 is fitted into the hole 78, and a bolt 81 is screwed into the nut 77 through the ring hole 80 to attach the operating tool 58. The hole 78 provided in the upper part of the operation tool 58 is formed larger than the outer diameter of the flanged ring 79 fitted to the operation tool 58, whereby the operation shaft 55 is inserted into the hole 53f of the sorting plate 53A and the nut. The manufacturing / mounting error when the bolt 81 is inserted through 77 is allowed.

  As shown in FIG. 5, the operation tool 58 has eleven holes 66 formed on the concentric circle of the axis a of the upper hole 78 at equal intervals along the circumferential direction. Two circular holes 59 for fixing the operation tool 58 are formed in the left side plate 52a of the sheave case 52, and the center of the hole 59 and the center of the nut coincide with each other on the inner surface of the left side plate 52a. A nut 59a is fixed. The distance between the center of the upper nut 77 and the center of the nut 59a is equal to the distance between the center of the upper hole 78 of the operation tool 58 and the center of the lower hole 66, and the eleven holes 66 have the same distance. Two nuts 59a are provided at positions separated by a pitch distance of 5 times the pitch between adjacent holes 66.

  When the operation tool 58 is fixed, the position where the operation tool 58 is swung forward is set in a direction in which the opening degree of the chaff sheave 15 is reduced, and conversely, the operation tool 58 is swung back. It is set in the direction in which the opening of the chaff sheave 15 is increased. FIG. 6 shows a fully closed state of the chaff sheave, and FIG. 5 shows an open state (half-open state). When the operation tool 58 is fixed, two bolts 60 as positioning fixing members are inserted into two holes 66 separated by 5 pitches (5 holes) out of 11 holes 66. The operation tool 58 is fixed by passing each bolt 60 through the hole 59 formed in the left side wall 52a and screwing it into the nut 59a.

  As shown in FIGS. 5 to 7, an opening 61 is formed in the left side wall 63 of the sorting unit 3 at a position corresponding to the outer side of the operation tool 58, and the opening 61 is detachable. Is blocked. When the opening degree of the chaff sheave 15 is changed, the opening degree of the chaff sheave 15 is changed by removing the opening / closing lid 62 and changing the position of the hole 59 to be bolted and fixed by swinging the operating tool 58.

  A rubber hump is provided at the upper ends of the left and right side plates 52a of the sheave case 52 in order to prevent the processed material from falling between the side plate 52a of the sheave case 52 and the side plate 63 of the sorting unit 3. 67 is fixed with bolts 68.

  FIG. 10A is a partially longitudinal side view showing a detailed view when the chaff sheave 15 is in the open state. When the chaff sheave 15 is in the open state, the adjacent front sorting plate 53B through which the sorting processed product passes is shown. The distance (processed material passage width) S1 between the rear surface position (the rear surface of the bulging portion 53d) and the front surface position (the front end position of the bent portion 53a) of the rear sorting plate 53B is relatively wide, and the chaff sheave 15 is opened. In the state, since the sorting plate 53B rises relatively steeply, the sorted product easily passes between the adjacent sorting plates 53B and 53B.

  FIG. 11 is a reference diagram for comparison with the embodiment of the present invention. In the reference example of FIG. 11, the bulging direction of the sorting plate 53B is opposite to the structure of the embodiment of the present invention. In FIG. 11, the sorting plate extends across the wide width in the upper and lower intermediate portions of the sorting plate 53B. A bulging portion 53k that bulges upward with respect to the plate surface of the 53B plate material 53b is formed. In this case, in the open state of the chaff sheave 15 shown in FIG. 11A, the rear position of the adjacent front sorting plate 53B (the back surface of the plate material 53b) and the front position of the rear sorting plate 53B (the front end position of the bent portion 53a). ) (Processed product passage width) S1 can be secured relatively wide.

  In the reference example of FIG. 11, since the bulging portion 53k is bulged forward, the thickness in the direction perpendicular to the sorting surface of the sorting plate 53B including the lower bent portion 53a and the middle bulging portion 53k. As shown in FIG. 11 (b), the gap between the rear surface of the front sorting plate 53B and the lower bent portion 53a of the rear sorting plate 53B is fully closed so that a predetermined minimum interval S0 is obtained. When the state is set, the sorting surface of the sorting plate 53B is greatly laid down, and the sorting surface (the front surface of the plate material 53b) is almost horizontal. As described above, when the sorting surface of the sorting plate 53B approaches horizontal, when the threshing processed product is likely to get wet, the sorted processing product is difficult to fall, and a sorting failure is likely to occur.

  On the other hand, in the embodiment of the present invention, as shown in FIG. 10, the bulging portion 53d is bulged downward (rearward) with respect to the selection surface. The thickness in the direction orthogonal to the sorting surface of the sorting plate 53B including the bulging portion 53d is thicker than that shown in the reference diagram shown in FIG. 11 by the amount of bulging the bulging portion 53d downward (rear). . As a result, as shown in FIG. 10B, a fully closed state in which the gap between the back surface of the front sorting plate 53B and the bent portion 53a at the lower portion of the rear sorting plate 53B is a predetermined minimum interval S0. Even if it is set, the sorting surface of the sorting plate 53B is not largely overlaid as shown in FIG. In the fully closed state shown in FIG. 10B, the back surface of the bulging portion 53d of the front sorting plate 53B and the upper edge of the bent portion 53a at the lower portion of the rear sorting plate 53B are opposed to each other.

  That is, in FIG. 10B and FIG. 11B, when the sorting plate 53B is tilted until the minimum interval S0 becomes the same, the sorting plate 53B shown in FIG. 10), the minimum spacing S0 is obtained when the bulging portion 53d bulges downward (backward) from the back surface of the plate 53b, so that the chaff sheave shown in FIG. 15, the chaff sheave 15 is fully closed in a state where the inclination angle of the selection surface of the selection plate 53B shown in FIG. 11 is large (minimum interval S0). Therefore, in the embodiment of the present invention shown in FIG. 10, since the inclination angle of the sorting surface of the sorting plate 53B can be relatively large even when the chaff sheave 15 is in the fully closed state, the sorted product tends to get somewhat wet. Even so, the sorted product can be dropped well, and a good sorting process can be performed in the open / closed state of the entire range of the chaff sheave 15.

[Another embodiment]
(1) In the main embodiment, only one bulging portion 53d is provided for one sorting plate 53. However, two or more bulging portions 53d may be provided in a state of being vertically separated. When a plurality of bulging portions 53d are provided for one sorting plate 53, all the bulging portions 53d may be bulged on the back side of the sorting plate 53, or on the plate surface of the sorting plate 53. On the other hand, it may be provided so as to bulge in both the front and rear directions.

(2) In the main embodiment, the upper and lower intermediate portions of the sorting plate 53 are formed with the bulging portion 53d that bulges downward (rear) with respect to the plate surface of the sorting plate 53 over the width in the width direction. The bulging portion 53d may be formed over the entire width of the sorting plate 53 in the width direction.

(3) In the main embodiment, the eleven holes 66 are formed in the operation tool 58. However, eleven holes 59 and nuts 59a shown in FIG. Two holes 66 may be formed with a distance of 5 times the pitch. In the above-described embodiment, the operation tool 58 can perform six types of angle changes, but the number of angles that can be appropriately changed in the range from fully open to fully closed of the sorting plate 53 may be increased or decreased. Furthermore, although the number of fixing bolts 60 is two, it may be one (in this case, the number of eleven holes 66 or 59 is six in the above example).

  The present invention can be applied not only to a self-decomposing combine, but also to a harvester for a harvester or a general combine.

DESCRIPTION OF SYMBOLS 1 Threshing apparatus 3 Sorting part 5 Handling room 8 Receiving net 15 Chaff sheave 52 Sheave case 53 Sorting plate 53a Bending part
53b plate material 53d bulging portion 54 support frame a horizontal axis S0 minimum interval

Claims (3)

A sheave case provided with a chaff sheave for sorting the threshing product that has fallen from the receiving net is provided in the sorting section located below the handling room of the threshing apparatus so as to be swingable back and forth, and a plurality of sorting plates are provided on the chaff sheave. The plurality of sorting plates are arranged in parallel at the front and rear at a pitch, and the plurality of sorting plates are supported so as to be swingable around a horizontal axis, and a long support frame is connected to the front and rear across the plurality of sorting plates. In the chaff sheave structure in the threshing device configured to change the angle of the plurality of sorting plates in conjunction with the opening of the chaff sheave,
In the lower part of the flat plate material , the sorting plate is formed with a bent portion that bends upward with respect to the plate surface of the sorting plate, and at the upper and lower intermediate portions of the plate material over the entire width in the width direction or in the width direction. constructed by forming a bulging portion which bulges downward side stepwise with respect to the plate surface of the plate member Te,
On the upper end portion of the bent portion of the sorting plate, a bent portion different from the bent portion bent forward with respect to the bent portion is formed,
When the chaff sheave is set in a fully closed state in which the interval between the adjacent sorting plates is the minimum interval, the back surface of the bulging portion is opposed to the upper edge of the bent portion of the sorting plate adjacent to the rear thereof. A predetermined gap that is the minimum gap is formed between the back surface of the bulging portion on the front side and the bent portion on the rear side,
When the chaff sheave is set in the fully closed state, the other bent portion of the rear sorting plate in the side view is in the direction parallel to the plate surface in the side view, the bulge of the front sorting plate. The chaff sheave structure in the threshing device located within the range where the part is formed . The chaff sheave structure in the threshing apparatus according to claim 1 , wherein a bottom portion of the bulging portion is formed flat . The bottom of the bulging portion of the front sorting plate and the other bent portion of the rear sorting plate are substantially parallel when the chaff sheave is set to the fully closed state. Chaff sheave structure in threshing equipment.

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