Threshing machine

Abstract

In a threshing machine, this prevents a decrease in sorting performance due to the accumulation of processed material in the chaff sieve of the sorting section. [Solution] The sorting unit has a sieve case 14 and a chaff sieve 22 provided on the sieve case 14, is positioned below the threshing unit, and is driven to reciprocate along the front-rear direction to sort the material from the threshing unit. The chaff sieve 22 has a plurality of chaff flips 24 arranged in the front-rear direction, and in a side view, the arrangement surface L1 formed by connecting the upper ends of each chaff flip 24 is attached to the sieve case 14 so as to be angle-adjustable with respect to the upper surfaces 15a, 16a of the sieve case 14.

Description

Technical Field

[0005] , , , ,

[0001] The present invention relates to the configuration of a threshing device.

Background Art

[0002] In a threshing device, as disclosed in Patent Document 1, there is one provided with a threshing unit that threshes the harvested crop, a sorting unit provided below the threshing unit, and a winnowing basket provided below the front part of the threshing unit. In Patent Document 1, the processed material threshed by the threshing unit falls onto the lower sorting unit, and while the sorting wind of the winnowing basket is supplied to the sorting unit, the sorting unit is reciprocally driven back and forth. While the processed material is conveyed from the front part to the rear part of the sorting unit, the harvested products such as grains and seeds are separated from the processed material and recovered, and the impurities such as straw scraps are discharged rearward from the sorting unit.

[0003] In Patent Document 1, in the sorting unit, a chaff sieve is provided in a rearwardly rising posture in a sieve case that is reciprocally driven back and forth. The processed material is conveyed rearward along the chaff sieve while riding on the chaff sieve. During this time, the harvested products are separated from the processed material by the back-and-forth operation of the chaff sieve and the sorting wind of the winnowing basket, and fall downward through between the chaff lips of the chaff sieve and are recovered.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] For example, when crops with high moisture content or crops with water clinging to them, such as after rain, are supplied to the threshing machine, the processed material that falls from the threshing section is more likely to stick to the chaff sieve. This makes it difficult for the processed material to be transported backward along the chaff sieve, potentially causing it to accumulate. Accumulation of processed material in the chaff sieve can lead to a decrease in sorting performance in the sorting section, so there is room for improvement.

[0006] The present invention aims to prevent a decrease in sorting performance in a threshing apparatus due to the accumulation of processed material in the chaff sieve of the sorting section. [Means for solving the problem]

[0007] The threshing apparatus of the present invention comprises a threshing unit for threshing harvested crops, a sorting unit having a sieve case and a chaff sieve provided on the sieve case, positioned below the threshing unit and driven reciprocatingly along the front-to-back direction to sort the material from the threshing unit, and a winnowing machine positioned below the front of the threshing unit to supply sorting air to the sorting unit, wherein the chaff sieve has a plurality of chaff flips arranged in the front-to-back direction along the left-to-right direction, and in a side view, the arrangement surface formed by connecting the upper ends of each of the chaff flips is attached to the sieve case so as to be angle-adjustable with respect to the upper surface of the sieve case.

[0008] According to the present invention, in a chaff sieve, the arrangement surface formed by connecting to each of the upper ends of the chaff flips is angle-adjustable with respect to the upper surface of the sieve case, and the overall orientation of the chaff sieve is angle-adjustable vertically.

[0009] According to the present invention, for example, when crops that do not contain much moisture or crops that do not have water attached are supplied to the threshing machine, the overall position of the chaff sieve (position of the mounting surface) is preferably set to a rearward-upward position. In the aforementioned state, the material to be processed is transported backward along the chaff sieve, climbing up its course. During this time, the harvested material is separated from the processed material by the forward and backward movement of the chaff sieve and the sorting airflow of the winnowing machine, and is collected by falling downward through the chaff flips of the chaff sieve.

[0010] For example, when crops containing a lot of moisture or crops with water attached are supplied to the threshing machine, the overall position of the chaff sieve (position of the mounting surface) should be set to a position close to horizontal. When the overall orientation of the chaff sieve (the orientation of the placement surface) is set to a near-horizontal position, the material placed on the chaff sieve is more easily transported backward along the chaff sieve. Even if the material is prone to sticking to the chaff sieve, the material placed on the chaff sieve will not accumulate as easily and will be more easily transported backward along the chaff sieve.

[0011] When the overall orientation of the chaff sieve (the orientation of the mounting surface) is set to a nearly horizontal position, the transport of the processed material on the chaff sieve is accelerated, raising concerns that the chaff sieve may not adequately separate the harvested material from the processed material. According to the present invention, when the overall posture of the chaff sieve (posture of the placement surface) is set to a nearly horizontal position, the sorting air from the winnowing machine is more easily supplied to the lower part of the chaff sieve, and more of the sorting air from the winnowing machine passes through the chaff flips of the chaff sieve and exits upward. As a result, a large amount of sorting air from the winnowing machine is supplied to the processed material from below, promoting the separation of the harvested material from the processed material. Therefore, even if the overall position of the chaff sieve (position of the mounting surface) is set to a near-horizontal position, the harvested material will be properly separated from the processed material.

[0012] As described above, according to the present invention, the overall posture (position of the placement surface) of the chaff sieve is configured to be able to change angle vertically, so that it can easily handle situations in which crops with little moisture or no water attached are supplied, and situations in which crops with a lot of moisture or crops with water attached are supplied to the threshing device, while maintaining the separation efficiency of harvested crops from processed material, thereby improving the sorting performance of the threshing device.

[0013] In the present invention, it is preferable that a right support member attached to the right side of the sheave case and a left support member attached to the left side of the sheave case are provided, the chaff flip is attached across the right and left support members, and the mounting position on the right and left sides of the right and left support members is changed so that the angle of the mounting surface is changed with respect to the upper surface of the sheave case.

[0014] According to the present invention, the right and left support members are attached to the right and left sides of the sieve case, and the chaff flip of the chaff sieve is attached across the right and left support members. By changing the mounting positions of the sieve case on the right and left support members, the overall orientation (position of the placement surface) of the chaff sieve can be easily changed vertically, thereby improving workability in the sorting section.

[0015] In the present invention, the right and left support members are preferably attached to the right and left sides so as to be able to change their orientation vertically with the rear of the support member as a pivot point, and the mounting positions of the right and left support members to the right and left sides are changed as the orientation of the right and left support members is changed vertically.

[0016] According to the present invention, the right and left support members are attached to the right and left sides of the sheave case so as to be able to change their orientation vertically with the rear of the support member as a pivot point. By changing the position of the front part of the support member downwards, the overall posture of the chaff sieve (posture of the placement surface) is set to a rearward-upward position. By changing the position of the front part of the support member upwards, the overall posture of the chaff sieve (posture of the placement surface) is set to a near-horizontal position.

[0017] When the overall orientation of the chaff sieve (the orientation of the placement surface) is set to a nearly horizontal position, the chaff sieve is positioned relatively high in the sieve case, which is advantageous in that it increases the amount of sorting air supplied by the winnowing machine to the bottom of the chaff sieve. This is advantageous in that even when the overall orientation of the chaff sieve (the orientation of the placement surface) is set to a nearly horizontal position, the separation of harvested crops from the processed material is properly achieved.

[0018] In the present invention, the chaff flip is equipped with a first member that is attached to the right and left support members and the sheave case, and whose mounting position on the sheave case can be changed so as to be changeable between an opening side that increases the distance between adjacent chaff flips and a closing side that decreases the distance between them; a second member that is connected to the chaff flip and can operate the chaff flip to the opening side and the closing side; and a connecting member that can connect the first member and the second member and whose connection position between the first member and the second member can be changed as the mounting position on the right and left sides of the right and left support members is changed. Preferably, when the mounting position of the first member on the sheave case is changed, the position of the second member is changed via the connecting member, and the distance between the chaff flips is changed.

[0019] In threshing machines, the chaff sieve may be configured to allow the spacing between adjacent chaff flips to be changed according to the condition of the processed material (crop), etc. According to the present invention, a first member provided in a sheave case, a second member provided in a chafing sheave, and a connecting member connecting the first member and the second member are provided. When the mounting posture of the first member in the sheave case is changed, the change in the mounting posture of the first member is transmitted to the second member via the connecting member, and the position of the second member is changed, so that the interval between the chafing lips of the chafing sheave is changed.

[0020] In the above-described configuration, when the mounting position of the chafing sheave in the sheave case is changed and the overall posture (posture of the mounting surface) of the chafing sheave is changed, the positional relationship between the first member and the second member changes (for example, the first member and the second member move away from or approach each other in the vertical direction).

[0021] According to the present invention, when the mounting position of the chafing sheave in the sheave case is changed, it is preferable that the connection position between the first member and the second member by the connecting member is changed to an appropriate position in response to the change in the mounting position of the chafing sheave in the sheave case. Thereby, even when the mounting position of the chafing sheave in the sheave case is changed, the change in the mounting posture of the first member is smoothly transmitted to the second member via the connecting member, the position of the second member is changed, and the interval between the chafing lips of the chafing sheave is smoothly changed.

[0022] In the present invention, a first chafing sheave provided in the sheave case, a mounting portion provided in a portion behind the first chafing sheave in the sheave case, and a stroller lock detachably attached to the mounting portion and extending rearward from the mounting portion are provided, and the chafing sheave is a second chafing sheave provided behind the first chafing sheave and provided so as to overlap the stroller lock in plan view. It is preferable that the stroller lock is attached to the mounting portion when the second chafing sheave is attached to the sheave case so that the placement surface is located at a first angle away from the mounting portion, and the stroller lock is removed from the mounting portion when the second chafing sheave is attached to the sheave case so that the placement surface is at a second angle closer to the mounting portion than the first angle.

[0023] In the threshing device, a first chaff sieve, a straw rack, and a second chaff sieve may be provided in the sieve case. In this case, the mounting portion is provided at a portion behind the first chaff sieve in the sieve case, the straw rack is attached to the mounting portion and extends rearward. The second chaff sieve is provided behind the first chaff sieve and is provided so as to overlap the straw rack in plan view.

[0024] According to the present invention, in the above-described configuration, the chaff sieve is the second chaff sieve, and the straw rack is detachable from the mounting portion. When the second chaff sieve is attached to the sieve case so that the arrangement surface of the second chaff sieve is located at a first angle away from the mounting portion, it is preferable that the straw rack be attached to the mounting portion. The second chaff sieve and the straw rack function without contacting each other.

[0025] When the second chaff sieve is attached to the sieve case so that the arrangement surface of the second chaff sieve becomes a second angle closer to the mounting portion than the first angle, the second chaff sieve and the straw rack may come into contact with each other. In this case, the straw rack is removed from the mounting portion, thereby preventing damage caused by contact between the second chaff sieve and the straw rack.

Brief Description of the Drawings

[0026] [Figure 1] It is a left side view of the threshing device. [Figure 2] It is a plan view of the vicinity of the straw rack and the second chaff sieve in the sieve case of the sorting unit. [Figure 3] It is an exploded left side view of the second chaff sieve, the support plate, the adjusting member, and the connecting member in a state where the second chaff sieve is attached to the sieve case at the first angle. [Figure 4] It is a front view of the vicinity of the left part of the second chaff sieve, the support plate, the adjusting member, and the connecting member in a state where the second chaff sieve is attached to the sieve case at the first angle. [Figure 5] This is a left side view of the second chaff sieve, support plate, adjustment member, and connecting member in a state where the second chaff sieve is attached to the sieve case at the first angle. [Figure 6] This is a left side view of the second chaff sieve, support plate, adjustment member, and connecting member in a state where the second chaff sieve is attached to the sieve case at a second angle. [Modes for carrying out the invention]

[0027] Figures 1 to 6 show threshing equipment mounted on a standard combine harvester. In Figures 1 to 6, F indicates the forward direction, B indicates the backward direction, U indicates the upward direction, D indicates the downward direction, R indicates the right direction, and L indicates the left direction.

[0028] (Overall configuration of the threshing machine) As shown in Figure 1, the threshing apparatus includes a threshing section 1 located at the top, a sorting section 2 located below the threshing section 1, a winnowing machine 3 located below the front of the threshing section 1, and a first-grade material collection section 4 and a second-grade material collection section 5 located below the sorting section 2.

[0029] (Structure of Threshing Unit 1) As shown in Figure 1, the threshing unit 1 is equipped with a threshing drum 6, a receiving net 7, and a dust supply valve 8, among other things. The threshing drum 6 is configured to rotate around an axis P1 along the front-rear direction, and is made up of a spiral scraping section 9 provided at the front, a plurality of round pipe-shaped threshing tooth support sections 10 arranged along the axis P1, and a number of round bar-shaped threshing teeth 11 extending radially outward from the threshing tooth support sections 10.

[0030] The receiving net 7 has a grid formed by a number of semicircular members arranged along the rotational direction of the threshing drum 6 and a number of rod members arranged along the axis P1. The receiving net 7 is positioned below the threshing drum 6 and is formed in a semi-cylindrical shape along the threshing drum 6. Numerous dust supply valves 8 are provided at the top of the threshing section 1 and are installed at an inclination with respect to the axis P1.

[0031] (Configuration of sorting unit 2) As shown in Figures 1 and 2, the sorting section 2 is provided with a sheave case 14 having a flat right side portion 15 and a left side portion 16, and the sheave case 14 is driven to reciprocate along the front-rear direction.

[0032] The sorting section 2 is formed by mounting the grain pans 17 and 18, the grain sieve 19, the straw rack 20, the first chaff sieve 21, and the second chaff sieve 22 across the right side 15 and left side 16 of the sieve case 14.

[0033] From the front of the sieve case 14, the grain pan 17, the first chaff sieve 21, the straw rack 20, and the second chaff sieve 22 are provided in this order. The grain pan 18 and grain sieve 19 are provided below the first chaff sieve 21.

[0034] The grain pans 17 and 18 are configured with numerous triangular cross-section protrusions arranged along the front-to-back direction. The grain sheave 19 is configured in a mesh-like manner. The first chaff sieve 21 and the second chaff sieve 22 are configured with a plurality of flat chaff flips 23 and 24 arranged in a row along the front-to-back direction, and the distance W1 (see Figure 3) between adjacent front-to-back chaff flips 23 and 24 is changed by changing the inclination angle of the chaff flips 23 and 24 in a side view.

[0035] (Configuration of winnowing machine 3, first material collection unit 4, and second material collection unit 5) As shown in Figure 1, the winnowing machine 3 is driven to rotate around an axis P2 along the left-right direction, and the sorting air is directed towards the rear. Multiple guide plates 26 are provided, and the sorting air from the winnowing machine 3 is guided by the guide plates 26 and supplied from below to the first chaff sieve 21, the straw rack 20, and the second chaff sieve 22, and also supplied from below to the grain sieve 19. The first object recovery unit 4 is located below the grain sieve 19. The second object recovery unit 5 is located below the second chaff sieve 22.

[0036] (The process of threshing and sorting in a threshing machine) As shown in Figure 1, the harvested crop is supplied from the inlet 12 to the threshing section 1, raked in towards the rear by the scraping section 9 of the threshing drum 6, and threshed by the threshing drum 6 (threshing tooth support section 10 and threshing teeth 11) while being guided to the rear by the dust supply valve 8.

[0037] The threshed material, processed by the threshing drum 6 (threshing tooth support section 10 and threshing teeth 11), falls through the receiving net 7 into the sorting section 2. Straw and other materials that do not fall through the receiving net 7 are discharged from the discharge section 13 at the rear of the threshing section 1.

[0038] The processed material that falls into the sorting section 2 is transported backward by the grain pan 17 and then to the first chaff sieve 21, where it is transported backward. The processed material that falls through the chaff flips 23 of the first chaff sieve 21 is transported backward by the grain pan 18 and then to the grain sieve 19. The processed material that falls through the grain sieve 19 is collected as the first crop (harvested material) in the first crop collection unit 4 and then transported to the combine harvester's grain tank (not shown).

[0039] The processed material transported to the first chaff sieve 21 is transported to the straw rack 20, then to the second chaff sieve 22, and then transported backward by the second chaff sieve 22. The processed material that falls through the chaff flips 24 of the second chaff sieve 22 is collected as second-grade material in the second-grade material collection unit 5 and returned to the threshing unit 1. Straw scraps and other materials that do not fall through the chaff flips 24 of the second chaff sieve 22 are transported backward by the second chaff sieve 22 and discharged from the discharge unit 13.

[0040] (Straw Rack 20 configuration) As shown in Figures 1, 2, and 3, the mounting portion 25 is provided between the rear of the first chaff sieve 21 and the front of the second chaff sieve 22, and is connected to the right side 15 and left side 16 of the sieve case 14.

[0041] A base plate member 29 having approximately the same left-right width as the mounting portion 25 is provided. The straw rack 20 is configured in a sawtooth shape when viewed from the side, and multiple straw racks 20 are connected to the base plate member 29 at intervals along the left-right direction, extending cantileveredly from the base plate member 29 toward the rear.

[0042] The state shown in Figures 2 and 3 is such that the substrate member 29 is connected to the mounting portion 25 by bolts 30, and the straw rack 20 extends cantilevered backward from the mounting portion 25.

[0043] The second chaff sieve 22 is located behind the first chaff sieve 21. The straw rack 20 is located above the second chaff sieve 22 so as to overlap with the second chaff sieve 22 in a plan view. When the bolt 30 is removed, the straw rack 20 and the base plate member 29 are removed together from the mounting part 25.

[0044] (Configuration of the second chaff sieve 22) As shown in Figures 2, 3, and 4, the right support member 27 is provided on the inner part of the right side 15 of the sheave case 14. The left support member 28 is provided on the inner part of the left side 16 of the sheave case 14.

[0045] The rear portions of the right and left support members 27 and 28 are attached to the rear portions of the right and left sides of the sheave case 14, respectively, so as to be able to swing up and down around an axis P3 that runs in the left-right direction, and the right and left support members 27 and 28 are connected to the right and left sides of the sheave case 14, respectively, by two bolts 31.

[0046] In the second chaff sieve 22, a plurality of flat chaff flips 24 are arranged in a line along the front-to-back direction, and the upper right and left portions of the chaff flips 24 are attached to the right and left support members 27 and 28 so as to be able to swing around an axis P4 along the left-to-right direction. The upper right and left portions of the rearmost chaff flip 24 are attached to the right and left support members 27 and 28 so as to be able to swing around an axis P3.

[0047] A flat, rod-shaped connecting member 32 on the right is pivotably mounted across the lower right portion of the chafflip 24. A flat, rod-shaped connecting member 32 on the left is pivotably mounted across the lower left portion of the chafflip 24. The tilt angle of the chafflip 24 with respect to the support members 27 and 28 is set by the connecting members 32.

[0048] When the position of the connecting member 32 is changed forward, the inclination angle of the chaff 24 with respect to the support members 27 and 28 becomes closer to horizontal, and the distance W1 between adjacent chaff 24 becomes smaller. When the position of the connecting member 32 is changed backward, the inclination angle of the chaff 24 with respect to the support members 27 and 28 becomes closer to vertical, and the distance W1 between adjacent chaff 24 becomes larger.

[0049] (Configuration of the overall attitude change of the second chaff sieve 22) As shown in Figure 3, connecting holes 14a and 14b are opened in the right side 15 and left side 16 of the sheave case 14. In the state shown in Figures 3, 4, and 5, the bolt 31 is connected across the support members 27 and 28 and the connecting hole 14a of the sheave case 14, with the front part of the support members 27 and 28 being lower than the rear part of the support members 27 and 28.

[0050] In the case of the second chaff sieve 22, if we assume that an arrangement surface L1 is formed by connecting across the upper ends of each chaff flip 24 in a side view, the state shown in Figures 3, 4, and 5 is the state in which the second chaff sieve 22 is attached to the sieve case 14 such that the arrangement surface L1 is located at a first angle A1 away from the mounting portion 25. When the second chaff sieve 22 is attached to the sieve case 14 at the first angle A1, the straw rack 20 and the substrate member 29 are attached to the mounting portion 25.

[0051] With the bolt 31 removed, the support members 27 and 28 become able to swing up and down around the axis P3. The state shown in Figure 6 is one in which the bolt 31 is connected across the support members 27, 28 and the connecting hole 14b of the sheave case 14, and the front parts of the support members 27, 28 and the support members 27, 28 are located at approximately the same height. The state shown in Figure 6 is one in which the second chaff sheave 22 is attached to the sheave case 14 such that the arrangement surface L1 is at a second angle A2, which is closer to the mounting portion 25 than the first angle A1. When the second chaff sieve 22 is attached to the sieve case 14 at the second angle A2, the straw rack 20 and the base plate member 29 are removed from the mounting portion 25.

[0052] With the above configuration, the second chaff sieve 22 is attached to the sieve case 14 such that, in a side view, the mounting surface L1 can be angle-adjusted relative to the upper surface 15a of the right side 15 and the upper surface 16a of the left side 16 of the sieve case 14.

[0053] (Configuration regarding the change in interval W1 in the second chaff sieve 22) As shown in Figures 3, 4, and 5, a triangular support plate 33 is provided in side view, and the upper part of the support plate 33 is connected to the outer part of the left side 16 of the sheave case 14. A triangular adjustment member 34 is provided in side view, and the adjustment member 34 is attached to the lower part of the support plate 33 so as to be able to swing around an axis P5 along the left-right direction.

[0054] The support plate 33 has two connecting holes 33a, two connecting holes 33b, and two connecting holes 33c. The adjustment member 34 has two connecting holes 34a and 34b. The bolt 35 connects the adjustment member 34 to the support plate 33 by connecting it across one of the connecting holes 34a or 34b of the adjustment member 34 and one of the connecting holes 33a, 33b, or 33c of the support plate 33. The mounting position of the adjustment member 34 to the support plate 33 is changed by changing the connecting holes 33a, 33b, or 33c of the support plate 33 to which the bolt 35 is connected.

[0055] An arm portion 32a extends downward from the front end of the left connecting member 32, and two connecting holes 32b and 32c are opened in the arm portion 32a. A connecting member 36 is provided for connecting the arm portion 32a of the left linking member 32 to the adjustment member 34. The connecting member 36 is constructed by connecting a connecting pin 36b to a base plate portion 36a.

[0056] (Change in the spacing W1 of the second chaff sieve 22 when the second chaff sieve 22 is attached to the sieve case 14 at the first angle A1) As shown in Figures 3, 4, and 5, when the second chaff sheave 22 is attached to the sheave case 14 at the first angle A1, the front parts of the support members 27 and 28 are lower than the rear parts of the support members 27 and 28. As a result, the connecting hole 32b of the left linking member 32 (arm portion 32a) and the lower part of the adjustment member 34 are at approximately the same height.

[0057] With the second chaff sieve 22 attached to the sieve case 14 at a first angle A1, the connecting pin 36b of the connecting member 36 is inserted through the lower connecting hole 34c of the adjustment member 34 and the connecting hole 32b of the left linking member 32 (arm portion 32a), and the base portion 36a of the connecting member 36 is connected to the adjustment member 34 by a bolt 37. As a result, the left linking member 32 (arm portion 32a) and the adjustment member 34 are connected via the connecting member 36, and the positions of the right and left linking members 32 are set by the adjustment member 34.

[0058] In the state shown in Figures 3, 4, and 5, the worker can change the mounting position of the adjustment member 34 to the support plate 33 around the axis P5 by removing the bolt 35. The change in the mounting position of the adjustment member 34 is transmitted to the left linking member 32 (arm portion 32a) via the connecting member 36, and the position of the linking member 32 is changed front to back, thereby changing the spacing W1 between adjacent chaff flips 24.

[0059] After changing the spacing W1 between adjacent chafflips 24, the worker connects the bolt 35 across one of the connecting holes 34a or 34b of the adjustment member 34 and either of the connecting holes 33a or 33b of the support plate 33. This fixes the mounting position of the adjustment member 34 to the support plate 33 and fixes the spacing W1 between adjacent chafflips 24.

[0060] With the second chaff sieve 22 attached to the sieve case 14 at a first angle A1, the worker connects the bolt 35 to either the connecting hole 33a or 33b of the support plate 33, but not to the connecting hole 33c of the support plate 33. An adjustment label 38, which serves as a guide for changing the mounting position of the adjustment member 34 to the support plate 33 (changing the spacing W1 between adjacent chaffs 24), is attached to the support plate 33.

[0061] (Transition in the second chaff sieve 22 from being attached to the sieve case 14 at the first angle A1 to being attached to the sieve case 14 at the second angle A2) When the second chaff sieve 22 is moved from being attached to the sieve case 14 at a first angle A1 to being attached to the sieve case 14 at a second angle A2, the worker performs the following steps (1) to (6) in order.

[0062] (1) Removal of bolt 35 as shown in Figures 3, 4, and 5. (2) Removal of bolt 37 and connecting member 36 as shown in Figures 3, 4, and 5. (3) Removal of the bolts 30 shown in Figures 3, 4, and 5. Removal of the straw rack 20 and the base plate member 29 from the mounting portion 25. (4) Removal of bolt 31 as shown in Figures 3, 4, and 5. (5) The second chaff sieve 22 (support members 27, 28) is changed to the second angle A2 (see Figure 6). (6) Connecting the bolt 31 to the connecting hole 14b of the sheave case 14 (see Figure 6).

[0063] After the above steps (1) to (6) are performed, and the second chaff sieve 22 is attached to the sieve case 14 at the second angle A2 as shown in Figure 6, the front parts of the support members 27, 28 and the support members 27, 28 are at approximately the same height, and the connecting hole 32c of the left linking member 32 (arm portion 32a) and the lower part of the adjustment member 34 are at approximately the same height.

[0064] In the state described above, the worker inserts the connecting pin 36b of the connecting member 36 across the connecting hole 34c (see Figure 3) of the adjustment member 34 and the connecting hole 32c (see Figure 3) of the left linking member 32 (arm portion 32a), and connects the base portion 36a of the connecting member 36 to the adjustment member 34 with a bolt 37. As a result, the left linking member 32 (arm portion 32a) and the adjustment member 34 are connected via the connecting member 36, and the positions of the right and left linking members 32 are set by the adjustment member 34.

[0065] (Change in the spacing W1 of the second chaff sieve 22 when the second chaff sieve 22 is attached to the sieve case 14 at a second angle A2) As shown in Figure 6, with the second chaff sheave 22 attached to the sheave case 14 at a second angle A2, the operator changes the mounting position of the adjustment member 34 relative to the support plate 33 around the axis P5. The change in the mounting position of the adjustment member 34 is transmitted to the left linking member 32 (arm portion 32a) via the connecting member 36, and the position of the linking member 32 is changed front to back, thereby changing the spacing W1 between adjacent chaff flips 24.

[0066] As shown in Figures 3 and 6, after changing the spacing W1 between adjacent chafflips 24, the worker connects the bolt 35 across one of the connecting holes 34a and 34b of the adjustment member 34 and either of the connecting holes 33a and 33c of the support plate 33. This fixes the mounting position of the adjustment member 34 to the support plate 33 and fixes the spacing W1 between adjacent chafflips 24.

[0067] With the second chaff sieve 22 attached to the sieve case 14 at a second angle A2, the worker connects the bolt 35 to either the connecting hole 33a or 33c of the support plate 33, but not to the connecting hole 33b of the support plate 33. An adjustment label 39, which serves as a guide for changing the mounting position of the adjustment member 34 to the support plate 33 (changing the spacing W1 between adjacent chaffs 24), is attached to the support plate 33.

[0068] (Transition in the second chaff sieve 22 from being attached to the sieve case 14 at a second angle A2 to being attached to the sieve case 14 at a first angle A1) When the second chaff sieve 22 is moved from being attached to the sieve case 14 at a second angle A2 to being attached to the sieve case 14 at a first angle A1, the worker performs the operations described in (1) to (4) above.

[0069] Next, as shown in Figures 3 and 5, the worker changes the angle of the second chaff sheave 22 (support members 27, 28) to the first angle A1 and connects the bolt 31 to the connecting hole 14a of the sheave case 14.

[0070] The worker inserts the connecting pin 36b of the connecting member 36 across the connecting hole 34c of the adjustment member 34 and the connecting hole 32b of the left linking member 32 (arm portion 32a), and connects the base portion 36a of the connecting member 36 to the adjustment member 34 with a bolt 37.

[0071] (First alternative embodiment of the invention) In the sheave case 14, one or more angles may be set between the first angle A1 and the second angle A2. With this configuration, the worker can select one angle from three or more angles, including the first angle A1 and the second angle A2, and attach the second chaff sieve 22 (support members 27, 28) to the sieve case 14 at the selected angle.

[0072] (Second alternative embodiment of the invention) The arm portion 32a of the left linking member 32 may be eliminated, and an arm portion (not shown) may be provided on the adjustment member 34. In this configuration, with the second chaff sieve 22 attached to the sieve case 14 at a first angle A1, the connecting member 36 is inserted and attached across the front of the left linking member 32 and the lower part of the arm of the adjustment member 34. With the second chaff sieve 22 attached to the sieve case 14 at a second angle A2, the connecting member 36 is inserted and attached across the front of the left linking member 32 and the upper part of the arm of the adjustment member 34.

[0073] (Third alternative embodiment of the invention) The straw rack 20 and the mounting portion 25 may be configured to be located above the second chaff sieve 22 so as to overlap with the second chaff sieve 22 in a plan view.

[0074] (Fourth alternative embodiment of the invention) Rather than the second chaff sieve 22 (support members 27, 28) being attached to the sieve case 14 so as to be able to swing around the axis P3, the entire second chaff sieve 22 (support members 27, 28) may be moved along the vertical direction so that the angle of the placement surface L1 is changed with respect to the upper surfaces 15a, 16a of the right side 15 and left side 16 of the sieve case 14.

[0075] (Fifth alternative embodiment of the invention) A feed chain (not shown) may be provided in the threshing unit 1. In this configuration, not all of the harvested crop is supplied to the threshing unit 1. Instead, the base of the harvested crop is held and transported by the feed chain, and the tips of the crop are inserted into the threshing unit 1 for threshing.

[0076] (Sixth alternative embodiment of the invention) The second chaff sieve 22 may be eliminated, and the configuration shown in Figures 3 to 6 may be adopted for the first chaff sieve 21. In this configuration, the first chaff sieve 21 becomes the chaff sieve.

[0077] (Correspondence with claims)-1 It is equipped with a threshing unit 1 for processing harvested crops. A sorting unit 2 is provided, which has a sieve case 14 and a chaff sieve (second chaff sieve 22) provided in the sieve case 14, is positioned below the threshing unit 1, and is driven to reciprocate along the front-rear direction to sort the material from the threshing unit 1. A winnowing machine 3 is positioned below the front of the threshing section 1 and supplies sorting air to the sorting section 2.

[0078] The chaff sieve (second chaff sieve 22) has multiple chaffs 24 arranged in a row along the front-to-back direction, and in a side view, the arrangement surface L1 formed by connecting the upper ends of each chaff 24 is attached to the sieve case 14 in a way that allows the angle to be changed relative to the upper surfaces 15a and 16a of the sieve case 14.

[0079] (Correspondence with claims)-2 The sheave case 14 is equipped with a right support member 27 attached to the right side 15 and a left support member 28 attached to the left side 16. Chafflips 24 are attached across the right and left support members 27 and 28.

[0080] By changing the mounting positions of the right and left support members 27 and 28 on the right and left sides, the angle of the mounting surface L1 is changed with respect to the upper surfaces 15a and 16a of the sheave case 14.

[0081] (Correspondence with claims)-3 The right and left support members 27 and 28 are attached to the right side 15 and left side 16 so that their orientation can be changed vertically using the rear of the support members 27 and 28 as a pivot point. By changing the vertical orientation of the right and left support members 27 and 28, the mounting positions of the right and left support members 27 and 28 to the right side 15 and left side 16 are changed.

[0082] (Correspondence with claims)-4 The adjustment member 34 corresponds to the first member. The connecting member 32 on the left corresponds to the second member. The chaff 24 is attached to the right and left support members 27 and 28 so that it can be changed to an open side that increases the distance W1 between adjacent chaff 24 and a closed side that decreases the distance W1.

[0083] A first component (adjustment component 34) is provided, which is attached to the sheave case 14 and whose mounting position on the sheave case 14 can be changed. A second member (linking member 32) is provided, which is connected to the chaff flip 24 and can operate the chaff flip 24 in the open and closed positions. A connecting member 36 is provided that can connect the first member (adjustment member 34) and the second member (linking member 32), and that the connection position between the first member (adjustment member 34) and the second member (linking member 32) can be changed as the mounting positions on the right side 15 and left side 16 of the right and left support members 27 and 28 are changed.

[0084] When the mounting position of the first member (adjustment member 34) in the sheave case 14 is changed, the position of the second member (linking member 32) is changed via the connecting member 36, and the spacing W1 of the chaff flips 24 is changed.

[0085] (Correspondence with claims)-5 The sieve case 14 is equipped with a first chaff sieve 21. The sieve case 14 is provided with a mounting portion 25 located at the rear of the first chaff sieve 21. A straw rack 20 is provided, which is detachably attached to the mounting portion 25 and extends rearward from the mounting portion 25. The chaff sieve (second chaff sieve 22) is located behind the first chaff sieve 21 and is positioned to overlap with the straw rack 20 in a plan view.

[0086] When the second chaff sieve 22 is attached to the sieve case 14 such that the placement surface L1 is located at a first angle A1 away from the mounting part 25, the straw rack 20 is attached to the mounting part 25.

[0087] When the second chaff sieve 22 is attached to the sieve case 14 such that the placement surface L1 is at a second angle A2 which is closer to the mounting portion 25 than the first angle A1, the straw rack 20 is removed from the mounting portion 25. [Industrial applicability]

[0088] This invention can be applied not only to threshing devices mounted on conventional combine harvesters, but also to threshing devices mounted on self-propelled combine harvesters, and even to threshing devices that are installed independently in a workshop or the like without being mounted on a combine harvester. [Explanation of Symbols]

[0089] 1. Threshing section 2. Sorting Section 3 Karawinoo 14 Sheave Case 15 Right side 15a Top part 16 Left side 16a Top part 20 Straw Rack 21. First Chaff Sieve 22. Second Chaff Sieve (Chaff Sieve) 24 Chafflip 25 Mounting part 27 Support Member 28 Support member 32. Connecting member (second member) 34 Adjustment member (first member) 36 Connecting Members a1 First angle a2 2nd angle L1 placement plane W1 Interval

Claims

1. The threshing section is used to process the harvested crops, A sorting unit having a sieve case and a chaff sieve provided in the sieve case, positioned below the threshing unit, and driven to reciprocate along the front-rear direction to sort the material from the threshing unit, A winnowing machine is provided, positioned below the front of the threshing section, to supply sorting air to the sorting section. The chaff sieve is a threshing device in which a plurality of chaff flips are arranged in a row along the front-to-back direction, and in a side view, the arrangement surface formed by connecting the upper ends of each of the chaff flips is attached to the sieve case in such a way that it can be angled relative to the upper surface of the sieve case.

2. The sheave case is provided with a right support member attached to the right side and a left support member attached to the left side of the sheave case. The chaff is attached across the right and left support members, The threshing apparatus according to claim 1, wherein the mounting positions of the right and left support members are changed on the right and left sides, thereby changing the angle of the arrangement surface with respect to the upper surface of the sieve case.

3. The right and left support members are attached to the right and left sides of the support member so as to be able to change their orientation vertically, with the rear of the support member as the pivot point. The threshing apparatus according to claim 2, wherein the mounting positions of the right and left support members on the right and left sides are changed by changing the orientation of the right and left support members vertically.

4. The chaff flips are attached to the right and left support members so as to be switchable between an open side that increases the distance between adjacent chaff flips and a closed side that decreases the distance between them. A first member that is attached to the sheave case and whose mounting position in the sheave case can be changed, A second member connected to the chaff, which can operate the chaff to the open and closed sides, A connecting member is provided that can connect the first member and the second member, and that can change the connection position between the first member and the second member as the mounting positions on the right and left sides of the right and left support members are changed. The threshing apparatus according to claim 2, wherein when the mounting position of the first member in the sieve case is changed, the position of the second member is changed via the connecting member, and the spacing of the chaff flips is changed.

5. The first chaff sieve provided in the sieve case, A mounting portion provided in the rear portion of the first chaff sieve in the sieve case, A straw rack is provided which is detachably attached to the mounting portion and extends rearward from the mounting portion. The chaff sieve is a second chaff sieve provided behind the first chaff sieve and overlapping with the straw rack in a plan view. When the second chaff sieve is attached to the sieve case such that the arrangement surface is positioned at a first angle away from the mounting portion, the straw rack is attached to the mounting portion. The threshing apparatus according to claim 1, wherein the second chaff sieve is attached to the sieve case such that the arrangement surface is at a second angle that is closer to the mounting portion than the first angle, and the straw rack is removed from the mounting portion.

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