Combine harvester

Abstract

To provide a combine harvester which can smoothly supply crops from a conveying device to a threshing device, when the conveying device is attached to a portion deviated rightward or leftward from the lateral center of the rear wall of a reaping portion.SOLUTION: The combine harvester is equipped with a reaping part 8 having a transverse feed auger 15 rotated and driven around an axial center along the right and left directions and reaping crops in a field. The horizontal feed auger 15 has a cylindrical body part 16, a first spiral part 21 and a second spiral part 22. A first end 21a of the first spiral part 21 on the conveyance device 7 side is located between a right virtual line L12 extending from the right conveyance chain 34 along the front-rear direction and a left virtual line L22 extending from the left conveyance chain 35 along the front-rear direction in a plan view.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to the configuration of a reaping unit in a general-purpose combine harvester. [Background technology]

[0002] An example of a general-purpose combine harvester is disclosed in Patent Document 1. In Patent Document 1, a lateral feed auger that rotates around a left-right axis is provided in the reaping section. The driving section is provided on the right side of the front of the machine body, and the transport device is attached to a part of the rear wall of the reaping section that is offset leftward from the left-right center.

[0003] The harvester cuts the crops in the field, and the horizontal auger transports the harvested crops laterally toward the entrance of the conveyor, where they are then supplied to the entrance. The harvested crops are then transported rearward by the conveyor, and are then supplied to the threshing device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-128448 A (see FIG. 3) Summary of the Invention [Problem to be solved by the invention]

[0005] In Patent Document 1, the conveying device is attached to a portion of the rear wall of the reaping unit that is offset to the left of the center, so the width of the portion of the reaping unit to the right of the conveying device is large and the width of the portion of the reaping unit to the left of the conveying device is small. A large amount of crops are conveyed from the right portion of the reaping unit to the entrance of the conveying device by the lateral feed auger, and a small amount of crops are conveyed from the left portion of the reaping unit to the entrance of the conveying device by the lateral feed auger.

[0006] This results in more crops being supplied to the right side of the entrance to the conveying device and less crops being supplied to the left side of the entrance to the conveying device.If the crops are transported by the conveying device in such a biased state, the crops will not be supplied properly from the conveying device to the threshing device, and there is a possibility that the crops will become stuck at the entrance to the threshing device.

[0007] The present invention aims to configure a combine harvester so that, when the conveying device is attached to a part of the rear wall of the cutting section that is offset to the right or left from the center of the left and right sides, crops can be smoothly supplied from the conveying device to the threshing device. [Means for solving the problem]

[0008] The combine harvester of the present invention is provided with a cutting section having a lateral feed auger that is driven to rotate about an axis along the left-right direction and that cuts crops in a field; a conveying device that is attached to a portion of the rear wall of the cutting section that is offset to the right or left from the left-right center and that conveys the crops cut by the cutting section rearward; and a threshing device to which the crops conveyed by the conveying device are supplied and that threshers the supplied crops, and the conveying device is provided with a right conveying chain that is mounted on the right side of the conveying device along the front-rear direction and that is driven to rotate about an axis along the left-right direction, a left conveying chain that is mounted on the left side of the conveying device along the front-rear direction and that is driven to rotate about an axis along the left-right direction, and a chain that is mounted across the right and left conveying chains. The horizontal feed auger has a cylindrical main body, a first spiral portion attached to a portion of the outer periphery of the main body opposite to the side where the conveying device is biased, and a second spiral portion attached to a portion of the outer periphery of the main body on the side where the conveying device is biased, and conveys the crops cut by the cutting section from the right and left parts of the cutting section to the right and left of the conveying device toward the entrance of the conveying device by the first spiral portion and the second spiral portion, and a first end of the first spiral portion on the side of the conveying device is located between a right imaginary line extending from the right conveying chain in the front-to-rear direction and a left imaginary line extending from the left conveying chain in the front-to-rear direction in a plan view.

[0009] Many combine harvester conveying devices have right and left conveyor chains that run along the front and rear of the right and left sides of the device, and conveyors attached across the right and left conveyor chains. When the right and left conveyor chains are rotated, the conveyor transports the crops backward.

[0010] Many combine harvester lateral feed augers have a first spiral attached to one of the right and left outer peripheries of a cylindrical main body, and a second spiral attached to the other. As the lateral feed auger rotates, the first and second spirals transport the crops from the right and left sides of the conveying device in the harvesting section toward the entrance of the conveying device. The crops transported by the first spiral section are supplied to the entrance of the conveying device near the first end of the first spiral section on the conveying device side, and the crops transported by the second spiral section are supplied to the entrance of the conveying device near the second end of the second spiral section on the conveying device side.

[0011] According to the present invention, when the conveying device is attached to a portion of the rear wall of the cutting unit that is offset to the right or left from the center of the left and right, the first helical portion is attached to a portion of the outer periphery of the main body of the traverse auger opposite to the side where the conveying device is offset, and the second helical portion is attached to a portion of the outer periphery of the main body of the traverse auger on the side where the conveying device is offset. This results in a state in which more crops are supplied to the inlet of the conveying device from the first helical portion and less crops are supplied to the inlet of the conveying device from the second helical portion.

[0012] According to the present invention, a right virtual line is assumed to extend from the right conveying chain of the conveying device along the front-to-rear direction, and a left virtual line is assumed to extend from the left conveying chain of the conveying device along the front-to-rear direction, and the first end of the first spiral portion is located between the right virtual line and the left virtual line in a planar view.

[0013] For example, if the first spiral portion is provided on the right side of the cross-feed auger, the crops transported by the first spiral portion are not only supplied from the first spiral portion to the right side of the entrance portion of the conveying device, but are also likely to be supplied to the left side of the entrance portion of the conveying device, making it easier for the crops to be supplied in a dispersed manner from the first spiral portion to the entrance portion of the conveying device. For example, if the first spiral portion is provided on the left side of the cross-feed auger, the crops transported by the first spiral portion are not only supplied from the first spiral portion to the left side of the entrance of the conveying device, but are also likely to be supplied to the right side of the entrance of the conveying device, making it easier for the crops to be supplied in a dispersed manner from the first spiral portion to the entrance of the conveying device.

[0014] This makes it easier for the crops to be supplied evenly across the entire width of the entrance of the conveying device by the first and second spiral sections, and the crops are transported by the conveying device with little bias in the left-right direction and supplied from the conveying device to the threshing device, so that the supply of crops from the conveying device to the threshing device is smooth with little backlog. By smoothly supplying crops from the conveying device to the threshing device with less backlog, the crop conveying performance can be improved, and the crop threshing performance can be improved.

[0015] In the present invention, it is preferable that the first end be located, in a plan view, between a central virtual line extending in the front-to-rear direction from the center position between the right and left conveying chains, and the virtual line on the right and left opposite the side to which the conveying device is biased.

[0016] According to the present invention, a central imaginary line is assumed to extend in the front-to-rear direction from a left-to-right central position between the right and left conveyor chains of the conveyor device. According to the present invention, for example, when the first spiral portion is provided on the right side of the cross-feed auger, the first end of the first spiral portion is located between the central virtual line and the right virtual line in a plan view, and does not cross the central virtual line and approach the second spiral portion. For example, if the first spiral portion is provided on the left side of the cross-feed auger, the first end of the first spiral portion is located between the central virtual line and the left virtual line in a planar view, and does not cross the central virtual line and approach the second spiral portion.

[0017] This prevents the crop from being supplied too much from the first spiral section to the part of the entrance of the conveying device that is closer to the second spiral section, which is advantageous in that the crop is supplied evenly across the entire width of the entrance of the conveying device, and in that it improves crop transport performance and crop threshing performance.

[0018] In the present invention, it is preferable that the first end be located in front of a left-right central portion between the right and left conveyor chains in a plan view.

[0019] According to the present invention, the first end of the first spiral portion is located in front of the left-right center between the right and left conveying chains of the conveying device when viewed in a plane, and the first end of the first spiral portion is not too close to the second spiral portion.

[0020] This prevents the crop from being supplied too much from the first spiral section to the part of the entrance of the conveying device that is closer to the second spiral section, which is advantageous in that the crop is supplied evenly across the entire width of the entrance of the conveying device, and in that it improves crop transport performance and crop threshing performance.

[0021] In the present invention, it is preferable that, in a plan view, the first end is located on the opposite side of the conveying device to the side where the conveying device is biased with respect to a central virtual line extending in the front-to-rear direction from the left-to-right central position between the right and left conveying chains, and that the second end of the second spiral portion on the conveying device side is located, in a plan view, on the side where the conveying device is biased with respect to the central virtual line, and that the first end is located, in a plan view, at a position closer to the central virtual line than the second end.

[0022] According to the present invention, a central imaginary line is assumed to extend in the front-to-rear direction from a left-to-right central position between the right and left conveyor chains of the conveyor device. The first end of the first spiral section is closer to the central imaginary line than the second end of the second spiral section, ensuring that the crops are easily dispersed and supplied from the first spiral section to the entrance of the conveying device. Since the first end of the first spiral section does not approach the second spiral section beyond the central imaginary line, a situation in which too much crop is supplied from the first spiral section to the portion of the conveying device on the side of the second spiral section at the inlet section is avoided.

[0023] This is advantageous in that the crops are supplied evenly across the entire width of the entrance of the conveying device, and is advantageous in that it improves the crop transport performance and the crop threshing performance.

[0024] In the present invention, it is preferable that the second end is located, in a plan view, between the central virtual line and the virtual line on the side to which the conveying device is biased, of the right and left virtual lines.

[0025] According to the present invention, for example, if the first spiral portion is provided on the right side of the cross-feed auger and the second spiral portion is provided on the left side of the cross-feed auger, even if the amount of crops supplied from the first spiral portion to the left side of the entrance of the conveying device is small, the crops will be supplied from the second spiral portion to the left side of the entrance of the conveying device, so the crops will be supplied evenly across the entire width of the entrance of the conveying device by the first spiral portion and the second spiral portion.

[0026] For example, if the first spiral portion is provided on the left side of the cross-feed auger and the second spiral portion is provided on the right side of the cross-feed auger, even if the amount of crops supplied from the first spiral portion to the right side of the entrance of the conveying device is small, the crops will be supplied from the second spiral portion to the right side of the entrance of the conveying device, so the crops will be supplied evenly across the entire width of the entrance of the conveying device by the first spiral portion and the second spiral portion.

[0027] This is advantageous in that the crops are supplied evenly across the entire width of the entrance of the conveying device, and is advantageous in that it improves the crop transport performance and the crop threshing performance.

[0028] In the present invention, the main body is provided with a plurality of raking members that are provided in a portion forward of the entrance portion and that rake crops transported toward the entrance portion by the first spiral portion and the second spiral portion into the entrance portion, and it is preferable that, in a planar view, there are a first passing locus along which the first end portion passes as the lateral feed auger rotates, a second passing locus along which the second end portion passes as the lateral feed auger rotates, and a wall imaginary line that extends in the fore-and-aft direction from the wall portion of the conveying device on the opposite side to the side to which the conveying device is biased, and the raking members provided between the first passing locus and the wall imaginary line are more numerous than the raking members provided between the first passing locus and the second passing locus.

[0029] Some combine harvester lateral feed augers have multiple raking members provided on the main body of the lateral feed auger in front of the entrance to the conveying device. The crops transported toward the entrance to the conveying device by the first and second spirals are not only supplied to the entrance to the conveying device by the first and second spirals, but are also raked into the entrance to the conveying device by the raking members.

[0030] According to the present invention, a first passing locus is assumed along which a first end of the first spiral portion passes as the traverse auger rotates. A second passing locus is assumed along which a second end of the second spiral portion passes as the traverse auger rotates. A virtual wall line is assumed to extend in the front-to-rear direction from a wall portion on the opposite side of the conveying device from the side to which the conveying device is biased.

[0031] According to the present invention, in a plan view, the number of scraping members provided between the first passing trajectory and the wall virtual line is set to be greater than the number of scraping members provided between the first passing trajectory and the second passing trajectory. The scraping members provided between the first passing trajectory and the wall virtual line are located in an area opposite to the side where the conveying device is biased from the first end of the first spiral section, so there are many scraping members in this area.

[0032] As a result, when a large amount of crops is supplied from the first spiral section to the entrance of the conveying device, the crops are scraped into the entrance of the conveying device by many scraping members, and the crops enter the inside of the conveying device from the entrance without any difficulty, which is advantageous in terms of improving crop transport performance and crop threshing performance.

[0033] In the present invention, it is preferable that at least one of the sweeping members is provided at a position on the first passing locus in a plan view.

[0034] Since the first passing locus of the first end of the first spiral portion is close to the center position between the right and left conveying chains of the conveying device, the scraping member provided at the position of the first passing locus scrapes the crops into the entrance of the conveying device at a position close to the center position between the right and left conveying chains of the conveying device.

[0035] As a result, the raking member located at the position of the first passing trajectory can more easily act on both the crops supplied from the first spiral section to the entrance of the conveying device and the crops supplied from the second spiral section to the entrance of the conveying device, so that there are fewer crops that the raking member does not act on, which is advantageous in terms of improving crop transport performance and crop threshing performance.

[0036] In the present invention, it is preferable that at least one of the sweeping members is provided in a position adjacent to the first end on the right side, and at least one of the sweeping members is provided in a position adjacent to the first end on the left side.

[0037] According to the present invention, when viewed in the circumferential direction of the traverse auger, the raking members are provided on both the right and left sides of the first end of the first spiral portion. This makes it easier for the right and left lateral scraping members to act on the crops supplied from the first spiral section to the entrance of the conveying device, which is advantageous in terms of improving crop transport performance and crop threshing performance.

[0038] In the present invention, it is preferable that at least one of the scraping members is provided in a position adjacent to the right side of the first end on the upstream side in the direction of rotation of the lateral feed auger, and that at least one of the scraping members is provided in a position adjacent to the left side of the first end on the upstream side in the direction of rotation of the lateral feed auger.

[0039] According to the present invention, the right and left lateral inlet members act on the crops supplied from the first spiral section to the entrance of the conveying device slightly later than the first end of the first spiral section, making it easier for the inlet members to act on the crops, which is advantageous in terms of improving crop transport performance and crop threshing performance.

[0040] In the present invention, it is preferable that at least one of the scraping members is provided in a position adjacent to the first end on the right side of the downstream side in the direction of rotation of the lateral feed auger, and that at least one of the scraping members is provided in a position adjacent to the first end on the left side of the downstream side in the direction of rotation of the lateral feed auger.

[0041] According to the present invention, the right and left lateral inlet members act on the crops supplied from the first spiral section to the entrance of the conveying device slightly ahead of the first end of the first spiral section, making it easier for the inlet members to act on the crops, which is advantageous in terms of improving crop transport performance and crop threshing performance. [Brief explanation of the drawings]

[0042] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. 2 is a longitudinal sectional left side view of the reaping unit and the transport device. [Figure 4] FIG. 2 is a cross-sectional plan view of the reaping unit and the transport device. [Figure 5] FIG. 10 is a plan view of the traverse auger and the conveying device in a state where the traverse auger is deployed. [Figure 6] FIG. [Figure 7] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0043] Figures 1 to 7 show a general-purpose combine harvester, and in Figures 1 to 7, 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.

[0044] (Overall configuration of the combine) As shown in Figures 1 and 2, a crawler-type traveling device 2 is provided on a machine frame 1, and a driving section 3 is provided on the right part of the front of the machine frame 1. A threshing device 4 is provided on the left part of the machine frame 1, a grain tank 5 is provided on the right part of the machine frame 1, and a crop discharge device 6 is attached to the lower part of the rear of the grain tank 5.

[0045] The conveying device 7 is attached to the front of the threshing device 4 so as to be able to swing up and down about an axis P1 along the left-right direction, and extends forward from the threshing device 4. The reaping unit 8 is attached to the front of the conveying device 7, and the reaping unit 8 and the conveying device 7 can be raised and lowered together about the axis P1.

[0046] As the combine moves forward, crops in the field are cut by the cutting unit 8, and the cut crops are supplied from the cutting unit 8 to the conveying device 7, transported rearward by the conveying device 7, and then supplied from the conveying device 7 to the threshing device 4. The crops are threshed by the threshing device 4, and the threshed and collected crops are stored in the grain tank 5. When the grain tank 5 is full, the crops in the grain tank 5 are discharged by the discharge device 6.

[0047] (Configuration of reaping unit 8) 1 and 2, the reaping unit 8 is provided with a bottom 9, a rear wall 10, side walls 11, a cutting device 12, a divider 13, a raking reel 14, and a lateral feed auger 15. The bottom 9, the rear wall 10, and the right and left side walls 11 are connected to form the framework of the reaping unit 8.

[0048] As shown in Figures 3 and 4, a clipper-type cutting device 12 is attached to the front of the bottom 9, and right and left dividers 13 are attached to the front of the side wall portions 11. A take-in reel 14 is provided above the cutting device 12. A transverse feed auger 15 is attached across the right and left side wall portions 11 so as to be rotatable about an axis P2 extending in the left-right direction.

[0049] As the combine moves forward, the crops in the field are divided by the divider 13, raked backward by the raking reel 14, and the base of the crops is cut by the cutting device 12, and the crops are harvested.

[0050] Crops cut on the right side of the cutting unit 8 are transported leftward by the horizontal feed auger 15, and are supplied from the horizontal feed auger 15 to the conveying device 7. Crops cut on the left side of the cutting unit 8 are transported rightward by the horizontal feed auger 15, and are supplied from the horizontal feed auger 15 to the conveying device 7. The crops are transported rearward by the conveying device 7, and are supplied from the conveying device 7 to the threshing device 4.

[0051] (Configuration of horizontal feed auger 15) As shown in FIGS. 3, 4 and 5, the traverse auger 15 includes a main body 16, a first helical portion 21, a second helical portion 22, and raking members 17, 18, 19, 20, 23, 24, 25 and 26.

[0052] The main body 16 is cylindrical and rotatably attached to the right and left side walls 11 around the axis P2. The first spiral portion 21 is flat and attached to the outer periphery of the main body 16, extending from a position offset leftward from the center of the main body 16 to the right end of the main body 16.

[0053] The second spiral portion 22 is formed in a flat plate shape and is attached to the outer periphery of the main body portion 16, spanning from a position offset leftward from the center position of the main body portion 16 to the left end portion of the main body portion 16. The first spiral portion 21 is formed to be longer than the second spiral portion 22.

[0054] The main body 16, the first spiral portion 21, and the second spiral portion 22 are rotated integrally in the rotation direction A1. When the first spiral portion 21 and the second spiral portion 22 are rotated in the rotation direction A1, they move in a direction from the bottom 9 of the reaping unit 8 toward the lower portion of an inlet 31 of the conveying device 7 (described later) and from the lower portion of the inlet 31 of the conveying device 7 toward the upper portion of the inlet 31 (see FIG. 3).

[0055] Sweeping members 17, 18, 19, 20, 23, 24, and 25 are provided on the outer periphery of the main body 16 in a region in front of the inlet 31 of the conveying device 7. Sweeping member 26 is provided on the right side of the outer periphery of the main body 16.

[0056] The sweeping members 17-20, 23-26 are configured to be able to protrude and retract radially into the main body 16. Each of the sweeping members 17-20, 23-26 protrudes from the main body 16 in a phase above, below, or in front of the main body 16, and retracts into the main body 16 in a phase behind the main body 16 (a phase facing an inlet 31 of the conveying device 7, which will be described later).

[0057] The crops cut at the right side of the cutting section 8 are scraped in by the scraping member 26, transported to the left by the first spiral section 21, and supplied to the entrance section 31 of the conveying device 7 from near the end 21a of the first spiral section 21, and are scraped into the entrance section 31 of the conveying device 7 by the scraping members 17-20, 23-25.

[0058] The crops cut at the left side of the cutting section 8 are transported to the right by the second spiral section 22 and supplied to the entrance section 31 of the conveying device 7 from near the end 22a of the second spiral section 22, and are scraped into the entrance section 31 of the conveying device 7 by the scraping members 17-20, 23-25.

[0059] (Configuration of the conveying device 7) As shown in Figures 3, 4, and 5, the conveying device 7 includes a bottom 27, right and left wall portions 28, 29, a top plate portion 30, an inlet portion 31, a drive shaft 32, a rotating body 33, right and left conveying chains 34, 35, a conveying body 36, a dust exhaust fan 37, etc.

[0060] The entire conveying device 7 is configured as a cylinder with a rectangular cross section, with a bottom 27, right and left wall sections 28, 29, and a top plate section 30 connected together. A rectangular entrance section 31 is formed at the front of the conveying device 7 by the front end of the bottom 27, the front ends of the walls 28, 29, and the front end of the top plate section 30, and the entrance section 31 is attached to a portion of the rear wall section 10 of the reaping unit 8 that is offset leftward from the center in the left-right direction.

[0061] A drive shaft 32 is provided rotatably around an axis P1 (see FIG. 1). A cylindrical rotor 33 is provided at the front of the conveying device 7 rotatably around an axis P3 extending in the left-right direction.

[0062] The right conveying chain 34 is attached between the right part of the drive shaft 32 and the right part of the rotating body 33, and the left conveying chain 35 is attached between the left part of the drive shaft 32 and the left part of the rotating body 33. A plurality of rod-shaped conveying bodies 36 are attached between the right and left conveying chains 34, 35, and each of the conveying bodies 36 is attached to the conveying chains 34, 35 at a predetermined interval in the front-to-rear direction.

[0063] 1, the rotating body 33 and the conveying chains 34, 35 are rotated in the rotation direction A2 around the axes P1, P3. The conveying body 36 moves backward along the bottom portion 27 and forward along the top plate portion 30.

[0064] 1 and 2, a dust exhaust fan 37 is provided on the top panel 30 of the transfer device 7. Dust inside the transfer device 7 is sucked by the dust exhaust fan 37 and discharged to the outside of the transfer device 7.

[0065] (Positional Relationship Between the First Spiral Section 21, the Second Spiral Section 22, and the Conveyor Device 7) As shown in FIG. 5, a right imaginary line L12 is assumed to extend from the right conveyor chain 34 of the conveyor device 7 in the front-rear direction in a plan view. A left imaginary line L22 extending from the left conveyor chain 35 of the conveyor device 7 along the front-rear direction is assumed. A central imaginary line L31 is assumed to extend from the left-right central position between the right and left conveyor chains 34, 35 of the conveyor device 7 along the front-rear direction.

[0066] The end 21a of the first spiral portion 21 is located slightly to the right of the central imaginary line L31 (opposite the side to which the conveying device 7 is biased) and is located to the left of the right imaginary line L12. As a result, the end 21a of the first spiral portion 21 is located between the right imaginary line L12 and the left imaginary line L22.

[0067] The end 21a of the first spiral portion 21 is located between the central imaginary line L31 and the right imaginary line L12 (the imaginary line on the opposite side of the right and left imaginary lines L12, L22 to the side to which the conveying device 7 is biased). The end 21a of the first spiral portion 21 is located in front of the left-right center between the right and left conveying chains 34, 35 of the conveying device 7.

[0068] An end 22a of the second spiral portion 22 is located on the left side of the central imaginary line L31 (the side to which the conveying device 7 is biased), and is located slightly to the right of the left imaginary line L22. As a result, the end 22a of the second spiral portion 22 is located between the central imaginary line L31 and the left imaginary line L22 (the imaginary line on the side where the conveying device 7 is biased, out of the right and left imaginary lines L12, L22).

[0069] When a distance W1 in the left-right direction between the end 21a of the first spiral portion 21 and the central virtual line L31 is compared with a distance W2 in the left-right direction between the end 22a of the second spiral portion 22 and the central virtual line L31, the distance W1 is smaller than the distance W2. As a result, the end 21a of the first spiral portion 21 is located closer to the central virtual line L31 than the end 22a of the second spiral portion 22.

[0070] As shown in Figures 3 and 5, when comparing the distance W3 from the end 21a of the first spiral portion 21 to the end 22a of the second spiral portion 22 when moving toward the upstream side of the rotation direction A1 with the distance W4 from the end 21a of the first spiral portion 21 to the end 22a of the second spiral portion 22 when moving toward the downstream side of the rotation direction A1, the distance W3 is slightly larger than the distance W4.

[0071] (Positional relationship between the scraping members 17-20, 23-25 ​​and the conveying device 7) As shown in Figure 5, in a plan view, a right wall virtual line L13 is imagined extending in the front-to-rear direction from the right wall 28 of the conveying device 7 (the wall of the conveying device 7 on the opposite side to the side to which the conveying device 7 is biased). A left wall imaginary line L23 is assumed to extend in the front-to-rear direction from the left wall 29 of the transport device 7 (the wall of the transport device 7 on the side to which the transport device 7 is biased). A first passing locus L11 along which the end 21a of the first spiral portion 21 passes as the traverse auger 15 rotates is assumed. A second passing locus L21 along which the end 22a of the second spiral portion 22 passes as the traverse auger 15 rotates is assumed.

[0072] The sweeping members 17 to 20, 23 to 25 are located between the right wall imaginary line L13 and the left wall imaginary line L23, and are provided in the main body 16 in front of the entrance 31 of the conveying device .

[0073] The sweeping member 20 is provided at a position on the first passing locus L11, adjacent to the right side of the end 22a of the second spiral portion 22 on the upstream side in the rotation direction A1. The sweeping member 25 is provided between the second passing trajectory L21 and the left wall imaginary line L23, and is provided at a position adjacent to the left lateral side on the upstream side of the end 22a of the second spiral portion 22 in the rotation direction A1.

[0074] The number of suction members 17, 18, 19 provided between the first passing trajectory L11 and the right wall virtual line L13 is greater than the number of suction members 23, 24 provided between the first passing trajectory L11 and the second passing trajectory L21.

[0075] The sweeping member 18 is provided at a position adjacent to the right side of the end 21a of the first spiral portion 21 on the upstream side in the rotation direction A1, and is provided on the right side of the central imaginary line L31. The sweeping member 24 is provided at a position adjacent to the left side of the end 21a of the first spiral portion 21 on the upstream side in the rotation direction A1, and is provided on the left side of the central imaginary line L31. The sweeping member 17 is provided at a position adjacent to the end 21a of the first spiral portion 21 on the right side of the downstream side in the rotation direction A1, and is provided on the right side of the central imaginary line L31. The sweeping member 23 is provided at a position adjacent to the end 21a of the first spiral portion 21 on the left side downstream in the rotation direction A1, and is provided on the left side of the central imaginary line L31.

[0076] As a result, the sweeping members 17, 18 are provided laterally to the right of the end 21a of the first helical portion 21, and the sweeping members 23, 24 are provided laterally to the left of the end 21a of the first helical portion 21. The end 21a of the first helical portion 21 is surrounded by the sweeping members 17, 18, 23, 24.

[0077] (Cover 38 configuration) 3 and 4, a cover 38 is provided above the entrance 31 of the conveying device 7. As shown in FIGS. 6 and 7, the cover 38 is made of a plate material and has a first portion 38a, a second portion 38b, and right and left third portions 38c.

[0078] A third portion 38c of the cover 38 is attached to the rear wall 10 of the reaping unit 8. When viewed along the direction H1, which is the movement direction of the conveying body 36 of the conveying device 7, the cover 38 is provided at the top within the range of the opening area of ​​the entrance 31 of the conveying device 7. The cover 38 is provided across the entire width of the entrance 31 of the conveying device 7 in the left-right direction.

[0079] In a side view, the first portion 38a of the cover 38 extends from the upper edge portion (the upper portion of the opening area) of the entrance portion 31 of the conveying device 7 toward the axis P2 of the lateral feed auger 15. In a side view, the second portion 38b of the cover 38 extends downward from the lower end portion of the first portion 38a of the cover 38 along the rear wall portion 10 of the reaping unit 8.

[0080] (Positional relationship between the cover 38 and each part) As shown in FIG. 6, when the reaping unit 8 is lowered to the ground, the cover 38 is located forward of the rear wall 10 of the reaping unit 8 (on the side of the lateral feed auger 15).

[0081] A movement locus L41 is assumed in a side view of the conveying body 36 of the conveying device 7. When the reaping unit 8 is lowered to the ground, the cover 38 is located forward of the front end of the movement locus L41 (toward the lateral feed auger 15).

[0082] In the traverse auger 15, the upper ends of the outer peripheries of the first spiral portion 21 and the second spiral portion 22 are defined as upper end portions 15a of the outer periphery of the traverse auger 15. When the cutting unit 8 is lowered to the ground, the cover 38 is provided at a position higher than the position of the upper end portions 15a of the outer periphery of the traverse auger 15 in a side view.

[0083] When viewed along direction H1, which is the movement direction of conveyor 36 of conveying device 7, cover 38 overlaps with the movement trajectories of first spiral portion 21 and second spiral portion 22, and also with the movement trajectories of sweeping members 17-20, 23-25. The lower end of second portion 38b of cover 38 is located at approximately the same height as the upper portion of movement trajectory L41, and is located at a higher position than conveying chains 34, 35 of conveying device 7.

[0084] When viewed downward in the direction H2 along the rear wall portion 10 of the cutting section 8 from a position above the cover 38, the cover 38 overlaps with the movement trajectories of the first spiral portion 21 and the second spiral portion 22, and also overlaps with the movement trajectories of the scraping members 17-20, 23-25.

[0085] A distance W5 is assumed between the lower end of the second portion 38b of the cover 38 in a side view and the outer peripheries of the first spiral portion 21 and the second spiral portion 22 of the traverse auger 15. A distance W6 is assumed between the lower end of the second portion 38b of the cover 38 in a side view and the movement locus L41. In this case, the distance W5 is smaller than the distance W6.

[0086] (First Alternative Embodiment of the Invention) The driving section 3 may be provided on the front left side of the machine frame 1, the threshing device 4 may be provided on the right side of the machine frame 1, and the grain tank 5 may be provided on the left side of the machine frame 1.

[0087] According to the above-described configuration, the transport device 7 attached to the front of the threshing device 4 is attached to a portion of the rear wall 10 of the reaping unit 8 that is offset to the right from the center in the left-right direction. The first spiral portion 21 is provided on the outer periphery of the main body 16 of the traverse auger 15 at a portion (left portion) opposite to the side (right side) where the conveying device 7 is biased. The second spiral portion 22 is provided on the outer periphery of the main body 16 of the traverse auger 15 at a portion (right portion) where the conveying device 7 is biased (right side).

[0088] As described above, when the conveying device 7 is attached to a part of the rear wall portion 10 of the cutting section 8 that is biased to the right from the center of the left and right sides, the imaginary line L22 becomes the imaginary line on the opposite side of the right and left imaginary lines L1, L2 to the side to which the conveying device 7 is biased. The end 21a of the first spiral portion 21 is located between the central imaginary line L31 and the left imaginary line L22 (the imaginary line on the opposite side of the right and left imaginary lines L12, L22 to the side where the conveying device 7 is biased). The end 22a of the second spiral portion 22 is located between the central imaginary line L31 and the right imaginary line L12 (the imaginary line on the side where the conveying device 7 is biased out of the right and left imaginary lines L12, L22).

[0089] (Second Alternative Embodiment of the Invention) The end 21a of the first spiral portion 21 may be configured to be located on the central virtual line L3 in a planar view, or may be configured to be located slightly to the side where the conveying device 7 is biased relative to the central virtual line L3 (the left side in Figure 5). In the above-described configuration, the end 21a of the first spiral portion 21 is also located in front of the left-right center between the right and left conveyor chains 34, 35 of the conveyor device 7 in plan view.

[0090] (Third Alternative Embodiment of the Invention) The interval W3 and the interval W4 may be the same value, or the interval W4 may be a value slightly larger than the interval W3.

[0091] (Fourth Alternative Embodiment of the Invention) The sweeping member 20 may be provided on the right side of the first passing trajectory L11, and may be provided between the first passing trajectory L11 and the right wall virtual line L13. According to this configuration, the number of suction members 17, 18, 19, and 20 provided between the first passing trajectory L11 and the right wall virtual line L13 is greater than the number of suction members 23 and 24 provided between the first passing trajectory L11 and the second passing trajectory L21.

[0092] (Fifth Alternative Embodiment of the Invention) The sweeping member 20 may be provided on the left side of the first passing locus L11 and between the first passing locus L11 and the second passing locus L21. With this configuration, the number of scavenging members 17, 18, 19 provided between the first passing trajectory L11 and the right wall virtual line L13 is the same as the number of scavenging members 20, 23, 24 provided between the first passing trajectory L11 and the second passing trajectory L21.

[0093] (Sixth Alternative Embodiment of the Invention) The sweeping member 25 may be provided on the right side of the second passing locus L21 and between the first passing locus L11 and the second passing locus L21. According to this configuration, the number of sweeping members 17, 18, 19 provided between the first passing trajectory L11 and the right wall virtual line L13 is the same as the number of sweeping members 23, 24, 25 provided between the first passing trajectory L11 and the second passing trajectory L21.

[0094] (Seventh Alternative Embodiment of the Invention) Two or more sweeping members 20 may be provided at positions on the first passing locus L11 in plan view.

[0095] Three or more sweeping members 17, 18 may be provided at positions adjacent to the right side of end 21a of first helical portion 21. Three or more sweeping members 23, 24 may be provided at positions adjacent to the left side of end 21a of first helical portion 21.

[0096] Two or more sweeping members 18 may be provided at positions adjacent to the right lateral side on the upstream side in the rotational direction A1 relative to the end 21a of the first spiral portion 21. Two or more sweeping members 24 may be provided at positions adjacent to the left lateral side on the upstream side in the rotational direction A1 relative to the end 21a of the first spiral portion 21.

[0097] Two or more sweeping members 17 may be provided adjacent to the right side of end 21a of first spiral portion 21 on the downstream side in the rotational direction A1. Two or more sweeping members 23 may be provided adjacent to the left side of end 21a of first spiral portion 21 on the downstream side in the rotational direction A1.

[0098] (Correspondence to claims)-1 The end 21a of the first spiral portion 21 corresponds to a first end of the first spiral portion 21 on the conveying device 7 side. An end 22a of the second spiral portion 22 corresponds to a second end of the second spiral portion 22 on the conveying device 7 side.

[0099] (Correspondence to claims)-2 The machine is provided with a reaping unit 8 that has a lateral feed auger 15 that is driven to rotate around an axis P2 that extends in the left-right direction and that reaps crops in the field. A conveying device 7 is attached to a portion of the rear wall 10 of the reaping unit 8 that is offset to the right or left from the center in the left-right direction, and conveys the crops cut by the reaping unit 8 rearward. The threshing device 4 is provided to receive the crops transported by the transport device 7 and thresh the crops.

[0100] The conveying device 7 has a right conveying chain 34 that is arranged along the front-to-rear direction on the right side of the conveying device 7 and is driven to rotate around axes P1 and P3 that are along the left-to-right direction, a left conveying chain 35 that is arranged along the front-to-rear direction on the left side of the conveying device 7 and is driven to rotate around axes P1 and P3 that are along the left-to-right direction, and a conveying body 36 that is attached across the right and left conveying chains 34 and 35.

[0101] The cross-feed auger 15 has a cylindrical main body 16, a first spiral portion 21 attached to the outer periphery of the main body 16 on the side opposite to the side where the conveying device 7 is biased, and a second spiral portion 22 attached to the outer periphery of the main body 16 on the side where the conveying device 7 is biased, and transports crops cut by the cutting section 8 from the right and left parts of the conveying device 7 in the cutting section 8 toward the entrance portion 31 of the conveying device 7 by the first spiral portion 21 and the second spiral portion 22.

[0102] The first end (end 21a) of the first spiral portion 21 on the side of the conveying device 7 is located, in a plan view, between a right imaginary line L12 extending from the right conveying chain 34 in the front-to-rear direction and a left imaginary line L22 extending from the left conveying chain 35 in the front-to-rear direction.

[0103] (Correspondence to claims) - 3 In a plan view, the first end (end 21a) is located between a central imaginary line L31 extending in the front-to-rear direction from the center position between the right and left conveying chains 34, 35, and one of the right and left imaginary lines L12, L22 that is on the opposite side to the side to which the conveying device 7 is biased. The first end (end 21a) is located in front of the left-right center between the right and left conveyor chains 34 and 35 in plan view.

[0104] (Correspondence to claims)-4 In a plan view, the first end (end 21a) is located on the opposite side of the central imaginary line L31 extending from the center position between the right and left conveying chains 34, 35 in the front-to-back direction from the side to which the conveying device 7 is biased. A second end (end 22a) of the second spiral portion 22 on the transport device 7 side is located on the side where the transport device 7 is biased with respect to the central virtual line L31 in plan view. The first end (end 21a) is located closer to the central virtual line L31 than the second end (end 22a) in a plan view. The second end (end 22a) is located between the central imaginary line L31 and the imaginary line on the side to which the conveyance device 7 is biased, out of the right and left imaginary lines L12 and L22, in a plan view.

[0105] (Correspondence to claims) - 5 The main body 16 is provided with a plurality of raking members 17-20, 23-25 ​​located in the front portion of the entrance 31, which raking crops transported toward the entrance 31 by the first spiral portion 21 and the second spiral portion 22 into the entrance 31.

[0106] In a plan view, the number of suction members 17, 18, 19 provided between the first passing locus L11 and the wall virtual line L13 is greater than the number of suction members 23, 24 provided between the first passing locus L11 and the second passing locus L21, in which the first end (end 21a) passes through as the cross-feed auger 15 rotates, the second passing locus L21 through which the second end (end 22a) passes through as the cross-feed auger 15 rotates, and the wall virtual line L13 extends in the front-to-rear direction from the wall portion 28 on the opposite side of the conveying device 7 from the side on which the conveying device 7 is biased.

[0107] (Correspondence to claims) - 6 At least one sweeping member 20 is provided at a position on the first passing locus L11 in plan view.

[0108] At least one sweeping member 17, 18 is provided at a position adjacent to the first end (end 21a) on the right side. At least one sweeping member 23, 24 is provided at a position adjacent to the left side of the first end (end 21a).

[0109] At least one scraping member 18 is provided at a position adjacent to the right side of the first end (end 21a) on the upstream side in the rotation direction of the traverse auger 15. At least one scraping member 24 is provided at a position adjacent to the left side of the first end (end 21a) on the upstream side in the rotation direction of the traverse auger 15.

[0110] At least one scraping member 17 is provided at a position adjacent to the right side of the first end (end 21a) on the downstream side in the rotation direction of the traverse auger 15. At least one scraping member 23 is provided at a position adjacent to the left side of the first end (end 21a) on the downstream side in the rotation direction of the traverse auger 15. [Industrial Applicability]

[0111] The present invention can be applied to general-purpose combine harvesters. [Explanation of symbols]

[0112] 4. Threshing equipment 7. Conveyor equipment 8 Reaping section 10 Rear wall 15 Horizontal feed auger 16 Main body 17 Scraping member 18 Scraping member 19 Scraping member 20 Scraping member 21 1st spiral part 21a End (first end) 22 Second spiral part 22a End (second end) 23 Scraping member 24 Scraping member 25 Scraping member 28 Wall 31 Entrance 34 Conveyor chain 35 conveyor chain 36 Transporter L11 1st passing trajectory L12 Virtual Line L13 Wall virtual line L21 2nd passing trajectory L22 Virtual Line L31 Central Virtual Line P1 axis center P2 axis center P3 axis center

Claims

1. a reaping unit having a lateral feed auger that is driven to rotate around an axis along the left-right direction and that reaps crops in a field; a conveying device attached to a portion of the rear wall of the reaping unit that is offset to the right or left from the left-right center, and that conveys the crops reaped by the reaping unit rearward; a threshing device to which the crops transported by the transport device are supplied and which threshes the supplied crops, The conveying device includes a right conveying chain that is provided on a right portion of the conveying device along the front-rear direction and is driven to rotate around an axis that is also along the left-right direction, a left conveying chain that is provided on a left portion of the conveying device along the front-rear direction and is driven to rotate around an axis that is also along the left-right direction, and a conveying body that is attached across the right and left conveying chains, The lateral feed auger has a cylindrical main body, a first spiral portion attached to a portion of the outer periphery of the main body opposite to the side where the conveying device is biased, and a second spiral portion attached to a portion of the outer periphery of the main body on the side where the conveying device is biased, and conveys crops cut by the cutting section from the right and left sides of the conveying device in the cutting section toward an entrance of the conveying device by the first spiral portion and the second spiral portion, A combine harvester in which the first end of the first spiral portion on the conveying device side is located, in a plan view, between a right imaginary line extending from the right conveying chain in the fore-and-aft direction and a left imaginary line extending from the left conveying chain in the fore-and-aft direction.

2. The combine harvester of claim 1, wherein the first end is located between a central imaginary line extending in the front-to-rear direction from the center position between the right and left conveying chains in a plan view and the imaginary line on the right and left opposite to the side to which the conveying device is biased.

3. The combine harvester according to claim 1 , wherein the first end is located forward of a left-right center portion between the right and left conveyor chains in a plan view.

4. the first end is located on the opposite side to the side to which the conveying device is biased with respect to a virtual central line extending in a front-rear direction from a left-right central position between the right and left conveying chains in a plan view, a second end portion of the second spiral portion on the conveying device side is located on a side where the conveying device is biased with respect to the central virtual line in a plan view; The combine harvester according to claim 1 , wherein the first end is located closer to the central virtual line than the second end in a plan view.

5. The combine harvester according to claim 4, wherein the second end is located between the center virtual line and one of the right and left virtual lines, the virtual line to which the conveying device is biased, in a plan view.

6. A plurality of raking members are provided in a portion of the main body in front of the entrance portion, and raking the crops transported toward the entrance portion by the first spiral portion and the second spiral portion into the entrance portion, a first passing locus along which the first end portion passes as the traverse auger rotates, a second passing locus along which the second end portion passes as the traverse auger rotates, and a wall imaginary line extending in the front-to-rear direction from a wall portion of the conveying device on the opposite side to the side to which the conveying device is biased, A combine harvester as described in claim 4, wherein, in a plan view, the number of scraping members provided between the first passing path and the wall virtual line is greater than the number of scraping members provided between the first passing path and the second passing path.

7. The combine harvester according to claim 6, wherein at least one of the sweeping members is provided at a position on the first passing locus in a plan view.

8. 7. The combine harvester according to claim 6, wherein at least one of the raking members is provided at a position adjacent to the right side of the first end, and at least one of the raking members is provided at a position adjacent to the left side of the first end.

9. At least one of the raking members is provided at a position adjacent to the first end on the right side of the upstream side in the rotation direction of the traverse auger, The combine harvester according to claim 8, wherein at least one of the raking members is provided at a position adjacent to and to the left of the first end portion on the upstream side in the rotation direction of the traverse auger.

10. At least one of the raking members is provided at a position adjacent to the first end on the right side of the downstream side in the rotation direction of the traverse auger, The combine harvester according to claim 8, wherein at least one of the raking members is provided at a position adjacent to and to the left of the first end portion on a downstream side in a rotational direction of the lateral feed auger.

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