Threshing device

Abstract

To provide a threshing device that is constituted so as to be capable of adjusting a range in which processed objects are leaked down from a receiving net, and can expand a range of adaptable crops.SOLUTION: A threshing device has a cylindrical threshing cylinder and a receiving net arranged at an interval along an outer peripheral surface of the threshing cylinder, threshes crops while conveying them in accordance with rotation of the threshing cylinder, and comprises a blocking member detachably attached to the receiving net. The receiving net has a plurality of leaking holes through which processed objects threshed between the threshing cylinder and the receiving net can be leaked down from above to below. The blocking member blocks a predetermined range out of the plurality of leaking holes when it is attached to the receiving net. The blocking member is opposed to a guide plate.SELECTED DRAWING: Figure 12

Description

Technical Field

[0001] The present invention relates to a threshing device mounted on a combine or the like, and more particularly to a threshing device in which processed material leaks from a receiving net.

Background Art

[0002] Conventionally, in a threshing device mounted on a combine or the like, there is one that has a receiving net below a handling cylinder and performs threshing of crops between the handling cylinder and the receiving net (see Patent Document 1). The processed material after threshing leaks from the leakage holes of the receiving net 21 and is sorted in the sorting chamber.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when the type or state of the crop to be threshed changes, the appropriate threshing time in the handling chamber and the like change. However, in the threshing device described in Patent Document 1, the range in which the processed material leaks from the receiving net is predetermined and cannot be changed. For this reason, the range of adaptable crops has been limited.

[0005] Therefore, an object of the present invention is to provide a threshing device configured to be able to adjust the range in which the processed material leaks from the receiving net and to expand the range of adaptable crops.

Means for Solving the Problems

[0006] The present invention has a cylindrical handling cylinder and a receiving net arranged at intervals along the outer peripheral surface of the handling cylinder, and in a threshing device that threshes while conveying crops in response to the rotation of the handling cylinder, it is provided with a plugging member that is detachably attached to the receiving net, The receiving net has a plurality of leakage holes capable of leaking the processed material that has been threshed between the handling cylinder and the receiving net from above to below. The plugging member plugs a predetermined range within the plurality of leakage holes in a state of being attached to the receiving net. It is characterized by this.

Effect of the Invention

[0007] According to the present invention, according to the type and state of the crop, by attaching and detaching the plugging member to and from the receiving net, the range where the processed material leaks from the receiving net can be adjusted, and the range of crops to which the threshing device can be applied can be expanded.

Brief Description of the Drawings

[0008]

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BEST MODE FOR CARRYING OUT THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The combine 1 is a general-purpose combine, and as shown in FIGS. 1 to 5, it has a machine body 3 supported by a traveling device 2 which is a pair of left and right crawler-type traveling devices. In front of the machine body 3, a pretreatment unit 5 for cutting the cereal straw in the field is provided so as to be vertically movable. On the front side of the machine body 3 and on one side (right side) in the left-right direction, an operation control unit 6 is provided where an operator sits to control the combine 1. On the other side (left side) of the machine body 3, a threshing device 7 for threshing and sorting the cereal straw cut and conveyed by the pretreatment unit 5 is provided. Behind the operation control unit 6, a grain tank 10 for storing the grains threshed and sorted by the threshing device 7 is arranged. Behind the grain tank 10, a discharge auger 11 for discharging the grains stored in the grain tank 10 to the outside of the machine is provided.

[0010] The pretreatment unit 5 includes a divider 12 for separating the cereal straw in the field, a reciprocating cutting blade 13 for cutting the cereal straw separated by the divider 12, a bucket-shaped platform 14 disposed on the rear side of the cutting blade 13, and a reel 15 disposed above the divider 12 and the cutting blade 13 for scraping the cereal straw to the rear side of the machine body 3. The cereal straw scraped into the platform 14 by the reel 15 is configured to be cut by the cutting blade 13. The cereal straw cut by the cutting blade 13 is laterally fed by a platform auger 16 in the platform 14, and the harvested grains are configured to be fed together with the cut cereal straw into the handling chamber 19 of the threshing device 7 by a feeder 17.

[0011] The threshing device 7 has a handling chamber 19 into which the cereal straw cut by the pretreatment unit 5 is fed, and a sorting chamber 9 disposed directly below the handling chamber 19. Threshing of the cereal straw is performed in the handling chamber 19, and sorting of the processed material threshed in the sorting chamber 9 is performed. In the handling chamber 19, a handling cylinder 20 having a spiral guide plate 20a attached to its outer peripheral surface is rotatably housed. The guide plate 20a is provided with a plurality of protruding handling teeth 20b for hooking the cereal straw and rotating it together with the handling cylinder 20. The handling cylinder 20 is formed in a cylindrical shape. Also, the handling chamber 19 is formed by a semi-cylindrical receiving net 21 along the outer periphery of the lower side (lower part of the handling cylinder 20) of the handling chamber 19. That is, the receiving net 21 is disposed below the handling cylinder 20 at a distance. The cereal straw fed into the handling chamber 19 is rotated together with the handling cylinder 20 by the handling teeth 20b, and while being conveyed to the rear side of the machine body by the guide plate 20a, it is rubbed against the receiving net 21 and threshed.

[0012] The sorting chamber 9 has a swinging sorting body 22 disposed below the receiving net 21, and a winnowing fan 23 and a blowing fan 24 that blow sorting air from the lower front side to the upper rear side of the swinging sorting body 22. The swinging sorting body 22 has an upper and lower two-stage structure, and is composed of an upper feed pan 25, chaff sieve 26, straw rack 27, and a lower glen sieve 29, chaff sieve 30, straw rack 31. These are continuously provided in the upper and lower stages and are swung back and forth to perform specific gravity sorting on the processed material. The feed pan 25 is a corrugated transfer plate that receives the processed material leaking from the receiving net 21 and the secondary product described later and transfers it backward. The chaff sieves 26 and 30 are composed of a plurality of fins arranged at a predetermined interval in the front-rear direction. These processed materials transferred backward are subjected to air sorting and screening by the sorting air of the winnowing fan 23 and the blowing fan 24, and the grains passing through the glen sieve 29 made of a wire mesh member with a predetermined mesh size fall as the primary product into the primary spiral 32. The processed material transferred to the end of the swinging sorting body 22 falls into the secondary spiral 33 through the straw racks 27, chaff sieve 30, and straw rack 31. Also, the long straws whose fall is restricted by the straw rack 31 are transferred to the end and discharged outside the machine. As shown in FIG. 5, in the handling chamber 19 and the sorting chamber 9, by opening upward a side cover 36 that is supported by a hinge 35 on the machine body 3 so as to be openable and closable, an operator can access.

[0013] A grain elevating device 37 for elevating the grains as the primary product to the glen tank 10 is connected to the primary spiral 32. Also, a reduction device 40 for elevating and reducing the secondary product to a reduction chamber 39 arranged on one side (right side) in the left-right direction of the handling chamber 19 is connected to the secondary spiral 33. As shown in FIG. 3, in the reduction chamber 39, a reduction horizontal spiral 41 parallel to the handling cylinder 20 is axially mounted, and by this reduction horizontal spiral 41, the secondary product reduced from the reduction device 40 to the rear end of the reduction chamber 39 is conveyed in the direction opposite to the conveying direction of the handling cylinder 20, that is, from the rear to the front.

[0014] As shown in FIGS. 3 and 4, the reduction chamber 39 has a handling chamber reduction port 42 at its front end facing the threshing start end of the handling chamber 19. The secondary products conveyed to the front end of the reduction chamber 39 by the reduction horizontal race 41 can be bounced out by a jumping plate 43 fixed to the front end of the reduction horizontal race 41 and reduced to the handling chamber 19 through the handling chamber reduction port 42.

[0015] As shown in FIGS. 3 and 5, a sorting chamber reduction port 45 communicating with the sorting chamber 9 is opened in the middle of the conveyance path from the rear end of the reduction chamber 39 to the handling chamber reduction port 42. As shown in FIGS. 6 and 7, the sorting chamber reduction port 45 is configured to be openable and closable by a communication port cover 46. As shown in FIG. 6, when the communication port cover 46 is fixed to the reduction chamber 39 by bolts 47, 47, the sorting chamber reduction port 45 is blocked. As shown in FIG. 7, when removing the communication port cover 46, first, the operator removes the upper cover 44 located above the sorting chamber reduction port 45 to enable access to the communication port cover 46. Then, the operator can remove the communication port cover 46 from the reduction chamber 39 by removing the bolts 47, 47 and open the sorting chamber reduction port 45.

[0016] When the sorting chamber reduction port 45 is blocked by the communication port cover 46, the secondary products pass through the sorting chamber reduction port 45 and are reduced from the handling chamber reduction port 42 to the handling chamber 19 by the jumping plate 43. On the other hand, when the communication port cover 46 is removed and the sorting chamber reduction port 45 is open, the secondary products fall from the sorting chamber reduction port 45 and are reduced to the sorting chamber 9. Therefore, the operator can alternatively switch whether to reduce the secondary products from the sorting chamber reduction port 45 to the sorting chamber 9 or from the handling chamber reduction port 42 to the handling chamber 19 by detaching and attaching the communication port cover 46.

[0017] As shown in FIGS. 8 and 9, on the rocking sorting body 22, four pairs of pushing plates 49R, 49L, 50R, 50L, 51R, 51L, 52R, 52L are arranged as a pair on the left and right sides of the rocking sorting body 22. These pushing plates 49R, 49L, 50R, 50L, 51R, 51L, 52R, 52L are fixed in a posture inclined so that the rear end side is closer to the left and right center of the rocking sorting body 22, and the processed materials that tend to stay near the left and right ends on the rocking sorting body 22 are pushed toward the center side and dispersed. Among the four pairs of pushing plates 49R, 49L, 50R, 50L, 51R, 51L, 52R, 52L, the pushing plates 51R, 51L, 52R, 52L located on the rear side extend to the outside beyond the pushing plates 49R, 49L, 50R, 50L located on the front side so that the grains riding on the left and right side ends of the rocking sorting body 22 are not discharged outside the machine.

[0018] As shown in FIG. 5, a passage 60 through which the processed materials falling from the sorting chamber return port 45 passes is formed between the side wall 9a of the sorting chamber 9 and the receiving net 21. Further, a guide plate 59 for guiding the by-products passing through the passage 60 toward the rocking sorting body 22 is fixed to the side wall 9a. The guide plate 59 is inclined downward as it goes toward the center of the sorting chamber 9 in the left-right direction. Since the width of the sorting chamber 9 in the left-right direction is narrower than the width of the handling chamber 19 in the left-right direction, the by-products are guided toward the rocking sorting body 22 by the guide plate 59.

[0019] Among the four pairs of pushing plates 49R, 49L, 50R, 50L, 51R, 51L, 52R, 52L, the pushing plate 49R arranged most forward and located on the side of the sorting chamber return port 45 in the left-right direction is arranged so that at least a part of it overlaps with the passage 60 and the front-rear direction of the machine body 3 in a plan view as shown in FIG. 8. Thereby, the by-products returned to the sorting chamber 9 are configured to be discharged to both the front side and the rear side of the pushing plate 49R.

[0020] Further, as shown in FIGS. 5, 8, and 9, the pushing plate 49R is composed of a substantially rectangular fixed plate 53 fixed to the swing sorting body 22 and a movable plate 56 that is overlapped with the fixed plate 53 and fixed to the fixed plate 53 by bolts 55, 55. The movable plate 56 has long holes 57, 57, and is configured such that the height of the pushing plate 49R can be adjusted by changing the positions of the long holes through which the bolts 55, 55 pass. The movable plate 56 also has an inclined portion 56a and is formed so as to gradually become higher toward the sorting chamber return port 45 side, which is one side of the sorting chamber 9.

[0021] For example, when returning the secondary product to the handling chamber 19 again, as shown in FIG. 5, the pushing plate 49R is overlapped so that the movable plate 56 does not protrude above the fixed plate 53, that is, the pushing plate 49R is set low and adjusted to be approximately the same height as the opposite pushing plate 49L. When the processed materials fall evenly from the receiving net 21 in the circumferential direction of the receiving net 21, the amount of processed materials on both sides of the swing sorting body 22 increases, but there is no difference in the amount of processed materials between the pushing plate 49R side and the pushing plate 49L side. Therefore, by making the heights of these pushing plates 49R and 49L substantially the same, the evenness of the processed materials on the swing sorting body can be improved, and the occurrence of discharge loss can be prevented.

[0022] On the other hand, in the case of grains that are easily damaged, such as soybeans, the secondary products are directly discharged into the sorting chamber 9. To this end, the operator removes the communication port cover 46 from the reduction chamber 39 so as to open the sorting chamber reduction port 45, and configures it so that the secondary products fall from the sorting chamber reduction port 45 (see Fig. 7). The secondary products that have fallen from the sorting chamber reduction port 45 are discharged from the passage 60 into the sorting chamber 9 and are dropped and guided by the guide plate 59. The secondary products that have been dropped and guided by the guide plate 59 fall on both the front side and the rear side of the gathering plate 49R on the swing sorting body 22. The secondary products discharged to the front side of the gathering plate 49R are gathered by the gathering plate 49R to the center side in the left-right direction of the swing sorting body 22, and the secondary products discharged to the rear side of the gathering plate 49R are rearwardly transferred without being gathered by the gathering plate 49R to the center side in the left-right direction of the swing sorting body 22. As a result, all of the discharged secondary products are not gathered by the gathering plate 49R to the center side of the swing sorting body 22 and do not overly gather at the center portion in the left-right direction of the swing sorting body 22, and the processed materials on the swing sorting body 22 can be efficiently dispersed to improve the uniformity of the processed materials.

[0023] When discharging the secondary products into the sorting chamber 9 in this way, as shown in Fig. 10, the side cover 36 is opened, and the gathering plate 49R is fixed so that the movable plate 56 protrudes above the fixed plate 53, that is, the gathering plate 49R is set high and adjusted higher than the gathering plate 49L on the opposite side. On the swing sorting body 22, the processed materials leaking from the receiving net 21 and the secondary products discharged from the passage 60 merge, and the amount of processed materials on the gathering plate 49R side becomes larger than the amount of processed materials on the gathering plate 49L side. Therefore, by setting the gathering plate 49R high, the processed materials on the gathering plate 49R side are gathered more to the center side of the swing sorting body 22 than the processed materials on the gathering plate 49L side, the uniformity of the processed materials on the swing sorting body 22 can be improved, and the sorting processing ability can be improved.

[0024] Also, when the pushing plate 49R is set high, the pushing plate 49R is formed to gradually rise toward the sorting chamber reduction port 45 and the passage 60 side by the inclined portion 56a formed on the movable plate 56. Therefore, the gap between the pushing plate 49R and the receiving net 21 becomes wider on the central side of the swing sorting body 22, and clogging can be prevented. Moreover, on the passage 60 side where the amount of processed material is large, more processed material can be pushed toward the central side, and the evenness of the processed material can be improved.

[0025] Next, the receiving net 21 and the plugging members 70 to 77 attached to the receiving net 21 will be described in detail. As shown in FIGS. 11 and 12, the receiving net 21 is a lattice net formed in a lattice shape by a plurality of bar members 81, a plurality of cross bars 82, and a frame body 83, and forms a plurality of leakage holes 21a through which the processed material dehulled between the handling cylinder 20 and the receiving net 21 can leak from above downward. Each cross bar 82 is a round bar member extending along the rotation axis direction (front-rear direction) of the handling cylinder 20, and a plurality of cross bars 82 are arranged side by side in the circumferential direction of the handling cylinder 20. The bar member 81 is an arc-shaped plate member extending along the rotation direction (circumferential direction) of the handling cylinder 20, and a plurality of bar members 81 are arranged side by side in the rotation axis direction (front-rear direction) of the handling cylinder 20.

[0026] Both ends of each bar member 81 and each cross bar 82 are welded to the frame body 83, and the intersecting portions of each bar member 81 and each cross bar 82 are also welded. Thereby, the plurality of bar members 81, the plurality of cross bars 82, and the frame body 83 are integrated to form the receiving net 21.

[0027] Also, plugging members 70 to 77 are detachably attached to the receiving net 21. Since the attachment configurations of these plugging members 70 to 77 are the same, only the attachment configuration of the plugging member 71 will be described.

[0028] As shown in FIGS. 11 and 12, the plurality of crossbar members 81 have two crossbar members 81a and 81b adjacent in the front-rear direction. The plugging member 71 is arranged so as to be sandwiched in the front-rear direction by the two crossbar members 81a and 81b, thereby restricting movement in the front-rear direction. Further, as shown in FIGS. 10 and 13, the plugging member 71 has a locking portion 71a at its upper end. The plugging member 71 is restricted from moving in the circumferential direction by the locking portion 71a being locked to the crossbar 82a located at the highest position among the plurality of crossbars 82.

[0029] Furthermore, a plate member 85 is arranged on the side opposite to the plugging member 71 with the receiving net 21 interposed therebetween. The plugging member 71 and the plate member 85 are fixed to each other by fixing members 86, 87, and 88 so as to sandwich the plurality of crossbars 82 of the receiving net 21. The fixing members 86, 87, and 88 are, for example, bolts and nuts. That is, the plate member 85 sandwiches the plurality of crossbars 82 together with the plugging member 71, thereby fixing the plugging member 71 to the receiving net 21. By removing the fixing members 86, 87, and 88, the plugging member 71 and the plate member 85 can be removed from the receiving net 21.

[0030] As shown in FIG. 10, the plugging members 70 to 77 block a predetermined range AR among the plurality of leakage holes 21a in a state of being attached to the receiving net 21. The predetermined range AR faces the guide plate 59. In other words, the plugging members 70 to 77 are arranged at positions facing the guide plate 59. Further, as shown in FIG. 11, in the front-rear direction, the predetermined range AR overlaps with the sorting chamber reduction port 45.

[0031] As described above, in the present embodiment, the plugging members 70 to 77 are detachably attached to the receiving net 21. The predetermined range AR where the plugging members 70 to 77 are provided overlaps with the sorting chamber reduction port 45 in the front-rear direction and faces the guide plate 59 that guides the second-grade product to the swinging sorting body 22.

[0032] Therefore, according to the type and condition of the crop, by attaching and detaching the blocking members 70 to 77, the range where the processed material leaks from the receiving net 21 can be adjusted, and the range of crops adaptable by the combine 1 can be expanded.

[0033] Also, in this embodiment, since the width of the sorting chamber 9 in the left - right direction is narrower than the width of the handling chamber 19 in the left - right direction, a part of the passage 60 is narrow. Specifically, a part of the passage 60 formed by the guide plate 59 and the receiving net 21 is narrow. Then, for example, when harvesting a crop with stems or branches, by attaching the blocking members 70 to 77 to the receiving net 21, it is possible to reduce the occurrence of jams caused by the stems or branches getting caught in the passage 60. Also, when it is desired to fully perform the threshing process in the handling chamber 19, by attaching the blocking members 70 to 77 to the receiving net 21, the residence time of the threshed material in the handling chamber 19 can be lengthened, and the threshing performance can be improved. In particular, since the blocking members 70 to 77 are arranged on the front side of the handling chamber 19, the threshed material can be threshed in the handling chamber 19 for a longer time.

[0034] Also, in a state where the blocking members 70 to 77 are removed from the receiving net 21, the secondary product that falls through the passage 60 from the sorting chamber return port 45 and the processed material (threshed material) that leaks from the receiving net 21 merge, and jams are likely to occur. However, by attaching the blocking members 70 to 77 to the receiving net 21, jams at the merging point of the secondary product and the processed material can be reduced, and the harvesting operation can be continued.

[0035] Furthermore, since the blocking members 70 to 77 are detachably fixed to the receiving net 21 by sandwiching a plurality of horizontal bars 82 with plate members (85) respectively, the attachment and detachment state of the blocking members 70 to 77 can be switched with a simple structure and low cost.

[0036] <Other Embodiments> In the above-described embodiment, the blocking members 70 to 77 were arranged in a predetermined range AR facing the guide plate 59, but the present invention is not limited to this. For example, the blocking members 70 to 77 may not be provided in the range facing the guide plate 59. Even in such a case, the leakage ability of the receiving net 21 can be adjusted.

[0037] Also, in the above-described embodiment, the blocking members 70 to 77 were fixed to the receiving net 21 by sandwiching the receiving net 21 together with the plate member 85, but the present invention is not limited to this. For example, the blocking members 70 to 77 may be detachably attached to the receiving net 21 by means of snap fit or the like without using the plate member 85.

[0038] Also, in the above-described embodiment, the blocking members 70 to 77 were respectively divided and arranged between two adjacent cross members, but the present invention is not limited to this. For example, a blocking member may be formed so as to straddle two adjacent cross members, and the shape and number of the blocking members detachably attached to the receiving net 21 are not limited.

[0039] Also, in the above-described embodiment, the receiving net 21 was formed by a plurality of cross members 81, a plurality of horizontal bars 82, and a frame body 83, but the present invention is not limited to this. For example, the receiving net 21 may be formed by a wire mesh composed of wire materials.

Explanation of Reference Numerals

[0040] 7 Threshing device 9 Sorting chamber 19 Handling chamber 20 Handling cylinder 21 Receiving net 21a A plurality of leakage holes 22 Oscillating sorting body 45 Sorting chamber return port 59 Guide plate 70 to 77 Blocking members 81 A plurality of cross members 81a, 81b Two cross members 82 A plurality of horizontal bars 85 Plate member AR Predetermined range

Claims

1. A threshing device having a cylindrical handling cylinder and a receiving net arranged at intervals along the outer peripheral surface of the handling cylinder, and threshing while conveying crops in accordance with the rotation of the handling cylinder, comprising a plugging member detachably attached to the receiving net, wherein the receiving net has a plurality of leaking holes through which the processed material threshed between the handling cylinder and the receiving net can leak downward from above, and the plugging member closes a predetermined range within the plurality of leaking holes in a state of being attached to the receiving net. A threshing device characterized by the above.

2. a handling chamber for housing the handling cylinder and performing the threshing process; a sorting chamber having a swing sorting body for sorting while rearwardly transferring the processed material threshed in the handling chamber; a sorting chamber reduction port disposed above the sorting chamber and capable of reducing the secondary product, which is the processed material sorted in the sorting chamber, back into the sorting chamber; and a guide plate for guiding the secondary product dropped from the sorting chamber reduction port toward the swing sorting body. The plugging member faces the guide plate. The threshing device according to claim 1, characterized by the above.

3. The receiving net has a plurality of horizontal bars each extending in the front-rear direction and arranged side by side in the circumferential direction along the outer peripheral surface of the handling cylinder, and a plurality of cross members each extending in the circumferential direction and arranged side by side in the circumferential direction. The plurality of horizontal bars and the plurality of cross members form the plurality of leaking holes. The plugging member is disposed between two cross members adjacent to each other in the front-rear direction among the plurality of cross members. The threshing device further comprises a plate member for fixing the plugging member to the receiving net by sandwiching the plurality of horizontal bars together with the plugging member. The threshing device according to claim 1 or 2, characterized by the above.

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